if (MSVC)
# C99 includes for msvc
- include_directories (msvc)
+ include_directories (${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/msvc)
# Enable math constants defines
add_definitions (-D_USE_MATH_DEFINES)
# which subdirectory they are declared
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
-include_directories (${CMAKE_CURRENT_SOURCE_DIR})
-
##############################################################################
# Bundled dependencies
# - on unices to prevent symbol collisions when tracing applications that link
# against other versions of these libraries
-set (ZLIB_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/zlib)
+set (ZLIB_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/zlib)
set (ZLIB_LIBRARIES z_bundled)
-add_subdirectory (zlib EXCLUDE_FROM_ALL)
+add_subdirectory (thirdparty/zlib EXCLUDE_FROM_ALL)
include_directories (${ZLIB_INCLUDE_DIRS})
link_libraries (${ZLIB_LIBRARIES})
-set (PNG_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/libpng)
+set (PNG_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/libpng)
set (PNG_DEFINITIONS "")
set (PNG_LIBRARIES png_bundled)
-add_subdirectory (libpng EXCLUDE_FROM_ALL)
+add_subdirectory (thirdparty/libpng EXCLUDE_FROM_ALL)
include_directories (${PNG_INCLUDE_DIR})
add_definitions (${PNG_DEFINITIONS})
link_libraries (${PNG_LIBRARIES})
+# For glext headers
+include_directories (${CMAKE_CURRENT_SOURCE_DIR}/thirdparty)
+
##############################################################################
# Common libraries / utilities
+++ /dev/null
-#ifndef __glext_h_
-#define __glext_h_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/*
-** Copyright (c) 2007-2010 The Khronos Group Inc.
-**
-** Permission is hereby granted, free of charge, to any person obtaining a
-** copy of this software and/or associated documentation files (the
-** "Materials"), to deal in the Materials without restriction, including
-** without limitation the rights to use, copy, modify, merge, publish,
-** distribute, sublicense, and/or sell copies of the Materials, and to
-** permit persons to whom the Materials are furnished to do so, subject to
-** the following conditions:
-**
-** The above copyright notice and this permission notice shall be included
-** in all copies or substantial portions of the Materials.
-**
-** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
-*/
-
-/* Header file version number, required by OpenGL ABI for Linux */
-/* glext.h last updated $Date: 2010-11-03 18:59:30 -0700 (Wed, 03 Nov 2010) $ */
-/* Current version at http://www.opengl.org/registry/ */
-#define GL_GLEXT_VERSION 66
-/* Function declaration macros - to move into glplatform.h */
-
-#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
-#define WIN32_LEAN_AND_MEAN 1
-#include <windows.h>
-#endif
-
-#ifndef APIENTRY
-#define APIENTRY
-#endif
-#ifndef APIENTRYP
-#define APIENTRYP APIENTRY *
-#endif
-#ifndef GLAPI
-#define GLAPI extern
-#endif
-
-/*************************************************************/
-
-#ifndef GL_VERSION_1_2
-#define GL_UNSIGNED_BYTE_3_3_2 0x8032
-#define GL_UNSIGNED_SHORT_4_4_4_4 0x8033
-#define GL_UNSIGNED_SHORT_5_5_5_1 0x8034
-#define GL_UNSIGNED_INT_8_8_8_8 0x8035
-#define GL_UNSIGNED_INT_10_10_10_2 0x8036
-#define GL_TEXTURE_BINDING_3D 0x806A
-#define GL_PACK_SKIP_IMAGES 0x806B
-#define GL_PACK_IMAGE_HEIGHT 0x806C
-#define GL_UNPACK_SKIP_IMAGES 0x806D
-#define GL_UNPACK_IMAGE_HEIGHT 0x806E
-#define GL_TEXTURE_3D 0x806F
-#define GL_PROXY_TEXTURE_3D 0x8070
-#define GL_TEXTURE_DEPTH 0x8071
-#define GL_TEXTURE_WRAP_R 0x8072
-#define GL_MAX_3D_TEXTURE_SIZE 0x8073
-#define GL_UNSIGNED_BYTE_2_3_3_REV 0x8362
-#define GL_UNSIGNED_SHORT_5_6_5 0x8363
-#define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364
-#define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365
-#define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
-#define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
-#define GL_UNSIGNED_INT_2_10_10_10_REV 0x8368
-#define GL_BGR 0x80E0
-#define GL_BGRA 0x80E1
-#define GL_MAX_ELEMENTS_VERTICES 0x80E8
-#define GL_MAX_ELEMENTS_INDICES 0x80E9
-#define GL_CLAMP_TO_EDGE 0x812F
-#define GL_TEXTURE_MIN_LOD 0x813A
-#define GL_TEXTURE_MAX_LOD 0x813B
-#define GL_TEXTURE_BASE_LEVEL 0x813C
-#define GL_TEXTURE_MAX_LEVEL 0x813D
-#define GL_SMOOTH_POINT_SIZE_RANGE 0x0B12
-#define GL_SMOOTH_POINT_SIZE_GRANULARITY 0x0B13
-#define GL_SMOOTH_LINE_WIDTH_RANGE 0x0B22
-#define GL_SMOOTH_LINE_WIDTH_GRANULARITY 0x0B23
-#define GL_ALIASED_LINE_WIDTH_RANGE 0x846E
-#endif
-
-#ifndef GL_VERSION_1_2_DEPRECATED
-#define GL_RESCALE_NORMAL 0x803A
-#define GL_LIGHT_MODEL_COLOR_CONTROL 0x81F8
-#define GL_SINGLE_COLOR 0x81F9
-#define GL_SEPARATE_SPECULAR_COLOR 0x81FA
-#define GL_ALIASED_POINT_SIZE_RANGE 0x846D
-#endif
-
-#ifndef GL_ARB_imaging
-#define GL_CONSTANT_COLOR 0x8001
-#define GL_ONE_MINUS_CONSTANT_COLOR 0x8002
-#define GL_CONSTANT_ALPHA 0x8003
-#define GL_ONE_MINUS_CONSTANT_ALPHA 0x8004
-#define GL_BLEND_COLOR 0x8005
-#define GL_FUNC_ADD 0x8006
-#define GL_MIN 0x8007
-#define GL_MAX 0x8008
-#define GL_BLEND_EQUATION 0x8009
-#define GL_FUNC_SUBTRACT 0x800A
-#define GL_FUNC_REVERSE_SUBTRACT 0x800B
-#endif
-
-#ifndef GL_ARB_imaging_DEPRECATED
-#define GL_CONVOLUTION_1D 0x8010
-#define GL_CONVOLUTION_2D 0x8011
-#define GL_SEPARABLE_2D 0x8012
-#define GL_CONVOLUTION_BORDER_MODE 0x8013
-#define GL_CONVOLUTION_FILTER_SCALE 0x8014
-#define GL_CONVOLUTION_FILTER_BIAS 0x8015
-#define GL_REDUCE 0x8016
-#define GL_CONVOLUTION_FORMAT 0x8017
-#define GL_CONVOLUTION_WIDTH 0x8018
-#define GL_CONVOLUTION_HEIGHT 0x8019
-#define GL_MAX_CONVOLUTION_WIDTH 0x801A
-#define GL_MAX_CONVOLUTION_HEIGHT 0x801B
-#define GL_POST_CONVOLUTION_RED_SCALE 0x801C
-#define GL_POST_CONVOLUTION_GREEN_SCALE 0x801D
-#define GL_POST_CONVOLUTION_BLUE_SCALE 0x801E
-#define GL_POST_CONVOLUTION_ALPHA_SCALE 0x801F
-#define GL_POST_CONVOLUTION_RED_BIAS 0x8020
-#define GL_POST_CONVOLUTION_GREEN_BIAS 0x8021
-#define GL_POST_CONVOLUTION_BLUE_BIAS 0x8022
-#define GL_POST_CONVOLUTION_ALPHA_BIAS 0x8023
-#define GL_HISTOGRAM 0x8024
-#define GL_PROXY_HISTOGRAM 0x8025
-#define GL_HISTOGRAM_WIDTH 0x8026
-#define GL_HISTOGRAM_FORMAT 0x8027
-#define GL_HISTOGRAM_RED_SIZE 0x8028
-#define GL_HISTOGRAM_GREEN_SIZE 0x8029
-#define GL_HISTOGRAM_BLUE_SIZE 0x802A
-#define GL_HISTOGRAM_ALPHA_SIZE 0x802B
-#define GL_HISTOGRAM_LUMINANCE_SIZE 0x802C
-#define GL_HISTOGRAM_SINK 0x802D
-#define GL_MINMAX 0x802E
-#define GL_MINMAX_FORMAT 0x802F
-#define GL_MINMAX_SINK 0x8030
-#define GL_TABLE_TOO_LARGE 0x8031
-#define GL_COLOR_MATRIX 0x80B1
-#define GL_COLOR_MATRIX_STACK_DEPTH 0x80B2
-#define GL_MAX_COLOR_MATRIX_STACK_DEPTH 0x80B3
-#define GL_POST_COLOR_MATRIX_RED_SCALE 0x80B4
-#define GL_POST_COLOR_MATRIX_GREEN_SCALE 0x80B5
-#define GL_POST_COLOR_MATRIX_BLUE_SCALE 0x80B6
-#define GL_POST_COLOR_MATRIX_ALPHA_SCALE 0x80B7
-#define GL_POST_COLOR_MATRIX_RED_BIAS 0x80B8
-#define GL_POST_COLOR_MATRIX_GREEN_BIAS 0x80B9
-#define GL_POST_COLOR_MATRIX_BLUE_BIAS 0x80BA
-#define GL_POST_COLOR_MATRIX_ALPHA_BIAS 0x80BB
-#define GL_COLOR_TABLE 0x80D0
-#define GL_POST_CONVOLUTION_COLOR_TABLE 0x80D1
-#define GL_POST_COLOR_MATRIX_COLOR_TABLE 0x80D2
-#define GL_PROXY_COLOR_TABLE 0x80D3
-#define GL_PROXY_POST_CONVOLUTION_COLOR_TABLE 0x80D4
-#define GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE 0x80D5
-#define GL_COLOR_TABLE_SCALE 0x80D6
-#define GL_COLOR_TABLE_BIAS 0x80D7
-#define GL_COLOR_TABLE_FORMAT 0x80D8
-#define GL_COLOR_TABLE_WIDTH 0x80D9
-#define GL_COLOR_TABLE_RED_SIZE 0x80DA
-#define GL_COLOR_TABLE_GREEN_SIZE 0x80DB
-#define GL_COLOR_TABLE_BLUE_SIZE 0x80DC
-#define GL_COLOR_TABLE_ALPHA_SIZE 0x80DD
-#define GL_COLOR_TABLE_LUMINANCE_SIZE 0x80DE
-#define GL_COLOR_TABLE_INTENSITY_SIZE 0x80DF
-#define GL_CONSTANT_BORDER 0x8151
-#define GL_REPLICATE_BORDER 0x8153
-#define GL_CONVOLUTION_BORDER_COLOR 0x8154
-#endif
-
-#ifndef GL_VERSION_1_3
-#define GL_TEXTURE0 0x84C0
-#define GL_TEXTURE1 0x84C1
-#define GL_TEXTURE2 0x84C2
-#define GL_TEXTURE3 0x84C3
-#define GL_TEXTURE4 0x84C4
-#define GL_TEXTURE5 0x84C5
-#define GL_TEXTURE6 0x84C6
-#define GL_TEXTURE7 0x84C7
-#define GL_TEXTURE8 0x84C8
-#define GL_TEXTURE9 0x84C9
-#define GL_TEXTURE10 0x84CA
-#define GL_TEXTURE11 0x84CB
-#define GL_TEXTURE12 0x84CC
-#define GL_TEXTURE13 0x84CD
-#define GL_TEXTURE14 0x84CE
-#define GL_TEXTURE15 0x84CF
-#define GL_TEXTURE16 0x84D0
-#define GL_TEXTURE17 0x84D1
-#define GL_TEXTURE18 0x84D2
-#define GL_TEXTURE19 0x84D3
-#define GL_TEXTURE20 0x84D4
-#define GL_TEXTURE21 0x84D5
-#define GL_TEXTURE22 0x84D6
-#define GL_TEXTURE23 0x84D7
-#define GL_TEXTURE24 0x84D8
-#define GL_TEXTURE25 0x84D9
-#define GL_TEXTURE26 0x84DA
-#define GL_TEXTURE27 0x84DB
-#define GL_TEXTURE28 0x84DC
-#define GL_TEXTURE29 0x84DD
-#define GL_TEXTURE30 0x84DE
-#define GL_TEXTURE31 0x84DF
-#define GL_ACTIVE_TEXTURE 0x84E0
-#define GL_MULTISAMPLE 0x809D
-#define GL_SAMPLE_ALPHA_TO_COVERAGE 0x809E
-#define GL_SAMPLE_ALPHA_TO_ONE 0x809F
-#define GL_SAMPLE_COVERAGE 0x80A0
-#define GL_SAMPLE_BUFFERS 0x80A8
-#define GL_SAMPLES 0x80A9
-#define GL_SAMPLE_COVERAGE_VALUE 0x80AA
-#define GL_SAMPLE_COVERAGE_INVERT 0x80AB
-#define GL_TEXTURE_CUBE_MAP 0x8513
-#define GL_TEXTURE_BINDING_CUBE_MAP 0x8514
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A
-#define GL_PROXY_TEXTURE_CUBE_MAP 0x851B
-#define GL_MAX_CUBE_MAP_TEXTURE_SIZE 0x851C
-#define GL_COMPRESSED_RGB 0x84ED
-#define GL_COMPRESSED_RGBA 0x84EE
-#define GL_TEXTURE_COMPRESSION_HINT 0x84EF
-#define GL_TEXTURE_COMPRESSED_IMAGE_SIZE 0x86A0
-#define GL_TEXTURE_COMPRESSED 0x86A1
-#define GL_NUM_COMPRESSED_TEXTURE_FORMATS 0x86A2
-#define GL_COMPRESSED_TEXTURE_FORMATS 0x86A3
-#define GL_CLAMP_TO_BORDER 0x812D
-#endif
-
-#ifndef GL_VERSION_1_3_DEPRECATED
-#define GL_CLIENT_ACTIVE_TEXTURE 0x84E1
-#define GL_MAX_TEXTURE_UNITS 0x84E2
-#define GL_TRANSPOSE_MODELVIEW_MATRIX 0x84E3
-#define GL_TRANSPOSE_PROJECTION_MATRIX 0x84E4
-#define GL_TRANSPOSE_TEXTURE_MATRIX 0x84E5
-#define GL_TRANSPOSE_COLOR_MATRIX 0x84E6
-#define GL_MULTISAMPLE_BIT 0x20000000
-#define GL_NORMAL_MAP 0x8511
-#define GL_REFLECTION_MAP 0x8512
-#define GL_COMPRESSED_ALPHA 0x84E9
-#define GL_COMPRESSED_LUMINANCE 0x84EA
-#define GL_COMPRESSED_LUMINANCE_ALPHA 0x84EB
-#define GL_COMPRESSED_INTENSITY 0x84EC
-#define GL_COMBINE 0x8570
-#define GL_COMBINE_RGB 0x8571
-#define GL_COMBINE_ALPHA 0x8572
-#define GL_SOURCE0_RGB 0x8580
-#define GL_SOURCE1_RGB 0x8581
-#define GL_SOURCE2_RGB 0x8582
-#define GL_SOURCE0_ALPHA 0x8588
-#define GL_SOURCE1_ALPHA 0x8589
-#define GL_SOURCE2_ALPHA 0x858A
-#define GL_OPERAND0_RGB 0x8590
-#define GL_OPERAND1_RGB 0x8591
-#define GL_OPERAND2_RGB 0x8592
-#define GL_OPERAND0_ALPHA 0x8598
-#define GL_OPERAND1_ALPHA 0x8599
-#define GL_OPERAND2_ALPHA 0x859A
-#define GL_RGB_SCALE 0x8573
-#define GL_ADD_SIGNED 0x8574
-#define GL_INTERPOLATE 0x8575
-#define GL_SUBTRACT 0x84E7
-#define GL_CONSTANT 0x8576
-#define GL_PRIMARY_COLOR 0x8577
-#define GL_PREVIOUS 0x8578
-#define GL_DOT3_RGB 0x86AE
-#define GL_DOT3_RGBA 0x86AF
-#endif
-
-#ifndef GL_VERSION_1_4
-#define GL_BLEND_DST_RGB 0x80C8
-#define GL_BLEND_SRC_RGB 0x80C9
-#define GL_BLEND_DST_ALPHA 0x80CA
-#define GL_BLEND_SRC_ALPHA 0x80CB
-#define GL_POINT_FADE_THRESHOLD_SIZE 0x8128
-#define GL_DEPTH_COMPONENT16 0x81A5
-#define GL_DEPTH_COMPONENT24 0x81A6
-#define GL_DEPTH_COMPONENT32 0x81A7
-#define GL_MIRRORED_REPEAT 0x8370
-#define GL_MAX_TEXTURE_LOD_BIAS 0x84FD
-#define GL_TEXTURE_LOD_BIAS 0x8501
-#define GL_INCR_WRAP 0x8507
-#define GL_DECR_WRAP 0x8508
-#define GL_TEXTURE_DEPTH_SIZE 0x884A
-#define GL_TEXTURE_COMPARE_MODE 0x884C
-#define GL_TEXTURE_COMPARE_FUNC 0x884D
-#endif
-
-#ifndef GL_VERSION_1_4_DEPRECATED
-#define GL_POINT_SIZE_MIN 0x8126
-#define GL_POINT_SIZE_MAX 0x8127
-#define GL_POINT_DISTANCE_ATTENUATION 0x8129
-#define GL_GENERATE_MIPMAP 0x8191
-#define GL_GENERATE_MIPMAP_HINT 0x8192
-#define GL_FOG_COORDINATE_SOURCE 0x8450
-#define GL_FOG_COORDINATE 0x8451
-#define GL_FRAGMENT_DEPTH 0x8452
-#define GL_CURRENT_FOG_COORDINATE 0x8453
-#define GL_FOG_COORDINATE_ARRAY_TYPE 0x8454
-#define GL_FOG_COORDINATE_ARRAY_STRIDE 0x8455
-#define GL_FOG_COORDINATE_ARRAY_POINTER 0x8456
-#define GL_FOG_COORDINATE_ARRAY 0x8457
-#define GL_COLOR_SUM 0x8458
-#define GL_CURRENT_SECONDARY_COLOR 0x8459
-#define GL_SECONDARY_COLOR_ARRAY_SIZE 0x845A
-#define GL_SECONDARY_COLOR_ARRAY_TYPE 0x845B
-#define GL_SECONDARY_COLOR_ARRAY_STRIDE 0x845C
-#define GL_SECONDARY_COLOR_ARRAY_POINTER 0x845D
-#define GL_SECONDARY_COLOR_ARRAY 0x845E
-#define GL_TEXTURE_FILTER_CONTROL 0x8500
-#define GL_DEPTH_TEXTURE_MODE 0x884B
-#define GL_COMPARE_R_TO_TEXTURE 0x884E
-#endif
-
-#ifndef GL_VERSION_1_5
-#define GL_BUFFER_SIZE 0x8764
-#define GL_BUFFER_USAGE 0x8765
-#define GL_QUERY_COUNTER_BITS 0x8864
-#define GL_CURRENT_QUERY 0x8865
-#define GL_QUERY_RESULT 0x8866
-#define GL_QUERY_RESULT_AVAILABLE 0x8867
-#define GL_ARRAY_BUFFER 0x8892
-#define GL_ELEMENT_ARRAY_BUFFER 0x8893
-#define GL_ARRAY_BUFFER_BINDING 0x8894
-#define GL_ELEMENT_ARRAY_BUFFER_BINDING 0x8895
-#define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0x889F
-#define GL_READ_ONLY 0x88B8
-#define GL_WRITE_ONLY 0x88B9
-#define GL_READ_WRITE 0x88BA
-#define GL_BUFFER_ACCESS 0x88BB
-#define GL_BUFFER_MAPPED 0x88BC
-#define GL_BUFFER_MAP_POINTER 0x88BD
-#define GL_STREAM_DRAW 0x88E0
-#define GL_STREAM_READ 0x88E1
-#define GL_STREAM_COPY 0x88E2
-#define GL_STATIC_DRAW 0x88E4
-#define GL_STATIC_READ 0x88E5
-#define GL_STATIC_COPY 0x88E6
-#define GL_DYNAMIC_DRAW 0x88E8
-#define GL_DYNAMIC_READ 0x88E9
-#define GL_DYNAMIC_COPY 0x88EA
-#define GL_SAMPLES_PASSED 0x8914
-#endif
-
-#ifndef GL_VERSION_1_5_DEPRECATED
-#define GL_VERTEX_ARRAY_BUFFER_BINDING 0x8896
-#define GL_NORMAL_ARRAY_BUFFER_BINDING 0x8897
-#define GL_COLOR_ARRAY_BUFFER_BINDING 0x8898
-#define GL_INDEX_ARRAY_BUFFER_BINDING 0x8899
-#define GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING 0x889A
-#define GL_EDGE_FLAG_ARRAY_BUFFER_BINDING 0x889B
-#define GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING 0x889C
-#define GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING 0x889D
-#define GL_WEIGHT_ARRAY_BUFFER_BINDING 0x889E
-#define GL_FOG_COORD_SRC 0x8450
-#define GL_FOG_COORD 0x8451
-#define GL_CURRENT_FOG_COORD 0x8453
-#define GL_FOG_COORD_ARRAY_TYPE 0x8454
-#define GL_FOG_COORD_ARRAY_STRIDE 0x8455
-#define GL_FOG_COORD_ARRAY_POINTER 0x8456
-#define GL_FOG_COORD_ARRAY 0x8457
-#define GL_FOG_COORD_ARRAY_BUFFER_BINDING 0x889D
-#define GL_SRC0_RGB 0x8580
-#define GL_SRC1_RGB 0x8581
-#define GL_SRC2_RGB 0x8582
-#define GL_SRC0_ALPHA 0x8588
-#define GL_SRC1_ALPHA 0x8589
-#define GL_SRC2_ALPHA 0x858A
-#endif
-
-#ifndef GL_VERSION_2_0
-#define GL_BLEND_EQUATION_RGB 0x8009
-#define GL_VERTEX_ATTRIB_ARRAY_ENABLED 0x8622
-#define GL_VERTEX_ATTRIB_ARRAY_SIZE 0x8623
-#define GL_VERTEX_ATTRIB_ARRAY_STRIDE 0x8624
-#define GL_VERTEX_ATTRIB_ARRAY_TYPE 0x8625
-#define GL_CURRENT_VERTEX_ATTRIB 0x8626
-#define GL_VERTEX_PROGRAM_POINT_SIZE 0x8642
-#define GL_VERTEX_ATTRIB_ARRAY_POINTER 0x8645
-#define GL_STENCIL_BACK_FUNC 0x8800
-#define GL_STENCIL_BACK_FAIL 0x8801
-#define GL_STENCIL_BACK_PASS_DEPTH_FAIL 0x8802
-#define GL_STENCIL_BACK_PASS_DEPTH_PASS 0x8803
-#define GL_MAX_DRAW_BUFFERS 0x8824
-#define GL_DRAW_BUFFER0 0x8825
-#define GL_DRAW_BUFFER1 0x8826
-#define GL_DRAW_BUFFER2 0x8827
-#define GL_DRAW_BUFFER3 0x8828
-#define GL_DRAW_BUFFER4 0x8829
-#define GL_DRAW_BUFFER5 0x882A
-#define GL_DRAW_BUFFER6 0x882B
-#define GL_DRAW_BUFFER7 0x882C
-#define GL_DRAW_BUFFER8 0x882D
-#define GL_DRAW_BUFFER9 0x882E
-#define GL_DRAW_BUFFER10 0x882F
-#define GL_DRAW_BUFFER11 0x8830
-#define GL_DRAW_BUFFER12 0x8831
-#define GL_DRAW_BUFFER13 0x8832
-#define GL_DRAW_BUFFER14 0x8833
-#define GL_DRAW_BUFFER15 0x8834
-#define GL_BLEND_EQUATION_ALPHA 0x883D
-#define GL_MAX_VERTEX_ATTRIBS 0x8869
-#define GL_VERTEX_ATTRIB_ARRAY_NORMALIZED 0x886A
-#define GL_MAX_TEXTURE_IMAGE_UNITS 0x8872
-#define GL_FRAGMENT_SHADER 0x8B30
-#define GL_VERTEX_SHADER 0x8B31
-#define GL_MAX_FRAGMENT_UNIFORM_COMPONENTS 0x8B49
-#define GL_MAX_VERTEX_UNIFORM_COMPONENTS 0x8B4A
-#define GL_MAX_VARYING_FLOATS 0x8B4B
-#define GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS 0x8B4C
-#define GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS 0x8B4D
-#define GL_SHADER_TYPE 0x8B4F
-#define GL_FLOAT_VEC2 0x8B50
-#define GL_FLOAT_VEC3 0x8B51
-#define GL_FLOAT_VEC4 0x8B52
-#define GL_INT_VEC2 0x8B53
-#define GL_INT_VEC3 0x8B54
-#define GL_INT_VEC4 0x8B55
-#define GL_BOOL 0x8B56
-#define GL_BOOL_VEC2 0x8B57
-#define GL_BOOL_VEC3 0x8B58
-#define GL_BOOL_VEC4 0x8B59
-#define GL_FLOAT_MAT2 0x8B5A
-#define GL_FLOAT_MAT3 0x8B5B
-#define GL_FLOAT_MAT4 0x8B5C
-#define GL_SAMPLER_1D 0x8B5D
-#define GL_SAMPLER_2D 0x8B5E
-#define GL_SAMPLER_3D 0x8B5F
-#define GL_SAMPLER_CUBE 0x8B60
-#define GL_SAMPLER_1D_SHADOW 0x8B61
-#define GL_SAMPLER_2D_SHADOW 0x8B62
-#define GL_DELETE_STATUS 0x8B80
-#define GL_COMPILE_STATUS 0x8B81
-#define GL_LINK_STATUS 0x8B82
-#define GL_VALIDATE_STATUS 0x8B83
-#define GL_INFO_LOG_LENGTH 0x8B84
-#define GL_ATTACHED_SHADERS 0x8B85
-#define GL_ACTIVE_UNIFORMS 0x8B86
-#define GL_ACTIVE_UNIFORM_MAX_LENGTH 0x8B87
-#define GL_SHADER_SOURCE_LENGTH 0x8B88
-#define GL_ACTIVE_ATTRIBUTES 0x8B89
-#define GL_ACTIVE_ATTRIBUTE_MAX_LENGTH 0x8B8A
-#define GL_FRAGMENT_SHADER_DERIVATIVE_HINT 0x8B8B
-#define GL_SHADING_LANGUAGE_VERSION 0x8B8C
-#define GL_CURRENT_PROGRAM 0x8B8D
-#define GL_POINT_SPRITE_COORD_ORIGIN 0x8CA0
-#define GL_LOWER_LEFT 0x8CA1
-#define GL_UPPER_LEFT 0x8CA2
-#define GL_STENCIL_BACK_REF 0x8CA3
-#define GL_STENCIL_BACK_VALUE_MASK 0x8CA4
-#define GL_STENCIL_BACK_WRITEMASK 0x8CA5
-#endif
-
-#ifndef GL_VERSION_2_0_DEPRECATED
-#define GL_VERTEX_PROGRAM_TWO_SIDE 0x8643
-#define GL_POINT_SPRITE 0x8861
-#define GL_COORD_REPLACE 0x8862
-#define GL_MAX_TEXTURE_COORDS 0x8871
-#endif
-
-#ifndef GL_VERSION_2_1
-#define GL_PIXEL_PACK_BUFFER 0x88EB
-#define GL_PIXEL_UNPACK_BUFFER 0x88EC
-#define GL_PIXEL_PACK_BUFFER_BINDING 0x88ED
-#define GL_PIXEL_UNPACK_BUFFER_BINDING 0x88EF
-#define GL_FLOAT_MAT2x3 0x8B65
-#define GL_FLOAT_MAT2x4 0x8B66
-#define GL_FLOAT_MAT3x2 0x8B67
-#define GL_FLOAT_MAT3x4 0x8B68
-#define GL_FLOAT_MAT4x2 0x8B69
-#define GL_FLOAT_MAT4x3 0x8B6A
-#define GL_SRGB 0x8C40
-#define GL_SRGB8 0x8C41
-#define GL_SRGB_ALPHA 0x8C42
-#define GL_SRGB8_ALPHA8 0x8C43
-#define GL_COMPRESSED_SRGB 0x8C48
-#define GL_COMPRESSED_SRGB_ALPHA 0x8C49
-#endif
-
-#ifndef GL_VERSION_2_1_DEPRECATED
-#define GL_CURRENT_RASTER_SECONDARY_COLOR 0x845F
-#define GL_SLUMINANCE_ALPHA 0x8C44
-#define GL_SLUMINANCE8_ALPHA8 0x8C45
-#define GL_SLUMINANCE 0x8C46
-#define GL_SLUMINANCE8 0x8C47
-#define GL_COMPRESSED_SLUMINANCE 0x8C4A
-#define GL_COMPRESSED_SLUMINANCE_ALPHA 0x8C4B
-#endif
-
-#ifndef GL_VERSION_3_0
-#define GL_COMPARE_REF_TO_TEXTURE 0x884E
-#define GL_CLIP_DISTANCE0 0x3000
-#define GL_CLIP_DISTANCE1 0x3001
-#define GL_CLIP_DISTANCE2 0x3002
-#define GL_CLIP_DISTANCE3 0x3003
-#define GL_CLIP_DISTANCE4 0x3004
-#define GL_CLIP_DISTANCE5 0x3005
-#define GL_CLIP_DISTANCE6 0x3006
-#define GL_CLIP_DISTANCE7 0x3007
-#define GL_MAX_CLIP_DISTANCES 0x0D32
-#define GL_MAJOR_VERSION 0x821B
-#define GL_MINOR_VERSION 0x821C
-#define GL_NUM_EXTENSIONS 0x821D
-#define GL_CONTEXT_FLAGS 0x821E
-#define GL_DEPTH_BUFFER 0x8223
-#define GL_STENCIL_BUFFER 0x8224
-#define GL_COMPRESSED_RED 0x8225
-#define GL_COMPRESSED_RG 0x8226
-#define GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT 0x0001
-#define GL_RGBA32F 0x8814
-#define GL_RGB32F 0x8815
-#define GL_RGBA16F 0x881A
-#define GL_RGB16F 0x881B
-#define GL_VERTEX_ATTRIB_ARRAY_INTEGER 0x88FD
-#define GL_MAX_ARRAY_TEXTURE_LAYERS 0x88FF
-#define GL_MIN_PROGRAM_TEXEL_OFFSET 0x8904
-#define GL_MAX_PROGRAM_TEXEL_OFFSET 0x8905
-#define GL_CLAMP_READ_COLOR 0x891C
-#define GL_FIXED_ONLY 0x891D
-#define GL_MAX_VARYING_COMPONENTS 0x8B4B
-#define GL_TEXTURE_1D_ARRAY 0x8C18
-#define GL_PROXY_TEXTURE_1D_ARRAY 0x8C19
-#define GL_TEXTURE_2D_ARRAY 0x8C1A
-#define GL_PROXY_TEXTURE_2D_ARRAY 0x8C1B
-#define GL_TEXTURE_BINDING_1D_ARRAY 0x8C1C
-#define GL_TEXTURE_BINDING_2D_ARRAY 0x8C1D
-#define GL_R11F_G11F_B10F 0x8C3A
-#define GL_UNSIGNED_INT_10F_11F_11F_REV 0x8C3B
-#define GL_RGB9_E5 0x8C3D
-#define GL_UNSIGNED_INT_5_9_9_9_REV 0x8C3E
-#define GL_TEXTURE_SHARED_SIZE 0x8C3F
-#define GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH 0x8C76
-#define GL_TRANSFORM_FEEDBACK_BUFFER_MODE 0x8C7F
-#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS 0x8C80
-#define GL_TRANSFORM_FEEDBACK_VARYINGS 0x8C83
-#define GL_TRANSFORM_FEEDBACK_BUFFER_START 0x8C84
-#define GL_TRANSFORM_FEEDBACK_BUFFER_SIZE 0x8C85
-#define GL_PRIMITIVES_GENERATED 0x8C87
-#define GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN 0x8C88
-#define GL_RASTERIZER_DISCARD 0x8C89
-#define GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS 0x8C8A
-#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS 0x8C8B
-#define GL_INTERLEAVED_ATTRIBS 0x8C8C
-#define GL_SEPARATE_ATTRIBS 0x8C8D
-#define GL_TRANSFORM_FEEDBACK_BUFFER 0x8C8E
-#define GL_TRANSFORM_FEEDBACK_BUFFER_BINDING 0x8C8F
-#define GL_RGBA32UI 0x8D70
-#define GL_RGB32UI 0x8D71
-#define GL_RGBA16UI 0x8D76
-#define GL_RGB16UI 0x8D77
-#define GL_RGBA8UI 0x8D7C
-#define GL_RGB8UI 0x8D7D
-#define GL_RGBA32I 0x8D82
-#define GL_RGB32I 0x8D83
-#define GL_RGBA16I 0x8D88
-#define GL_RGB16I 0x8D89
-#define GL_RGBA8I 0x8D8E
-#define GL_RGB8I 0x8D8F
-#define GL_RED_INTEGER 0x8D94
-#define GL_GREEN_INTEGER 0x8D95
-#define GL_BLUE_INTEGER 0x8D96
-#define GL_RGB_INTEGER 0x8D98
-#define GL_RGBA_INTEGER 0x8D99
-#define GL_BGR_INTEGER 0x8D9A
-#define GL_BGRA_INTEGER 0x8D9B
-#define GL_SAMPLER_1D_ARRAY 0x8DC0
-#define GL_SAMPLER_2D_ARRAY 0x8DC1
-#define GL_SAMPLER_1D_ARRAY_SHADOW 0x8DC3
-#define GL_SAMPLER_2D_ARRAY_SHADOW 0x8DC4
-#define GL_SAMPLER_CUBE_SHADOW 0x8DC5
-#define GL_UNSIGNED_INT_VEC2 0x8DC6
-#define GL_UNSIGNED_INT_VEC3 0x8DC7
-#define GL_UNSIGNED_INT_VEC4 0x8DC8
-#define GL_INT_SAMPLER_1D 0x8DC9
-#define GL_INT_SAMPLER_2D 0x8DCA
-#define GL_INT_SAMPLER_3D 0x8DCB
-#define GL_INT_SAMPLER_CUBE 0x8DCC
-#define GL_INT_SAMPLER_1D_ARRAY 0x8DCE
-#define GL_INT_SAMPLER_2D_ARRAY 0x8DCF
-#define GL_UNSIGNED_INT_SAMPLER_1D 0x8DD1
-#define GL_UNSIGNED_INT_SAMPLER_2D 0x8DD2
-#define GL_UNSIGNED_INT_SAMPLER_3D 0x8DD3
-#define GL_UNSIGNED_INT_SAMPLER_CUBE 0x8DD4
-#define GL_UNSIGNED_INT_SAMPLER_1D_ARRAY 0x8DD6
-#define GL_UNSIGNED_INT_SAMPLER_2D_ARRAY 0x8DD7
-#define GL_QUERY_WAIT 0x8E13
-#define GL_QUERY_NO_WAIT 0x8E14
-#define GL_QUERY_BY_REGION_WAIT 0x8E15
-#define GL_QUERY_BY_REGION_NO_WAIT 0x8E16
-#define GL_BUFFER_ACCESS_FLAGS 0x911F
-#define GL_BUFFER_MAP_LENGTH 0x9120
-#define GL_BUFFER_MAP_OFFSET 0x9121
-/* Reuse tokens from ARB_depth_buffer_float */
-/* reuse GL_DEPTH_COMPONENT32F */
-/* reuse GL_DEPTH32F_STENCIL8 */
-/* reuse GL_FLOAT_32_UNSIGNED_INT_24_8_REV */
-/* Reuse tokens from ARB_framebuffer_object */
-/* reuse GL_INVALID_FRAMEBUFFER_OPERATION */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE */
-/* reuse GL_FRAMEBUFFER_DEFAULT */
-/* reuse GL_FRAMEBUFFER_UNDEFINED */
-/* reuse GL_DEPTH_STENCIL_ATTACHMENT */
-/* reuse GL_INDEX */
-/* reuse GL_MAX_RENDERBUFFER_SIZE */
-/* reuse GL_DEPTH_STENCIL */
-/* reuse GL_UNSIGNED_INT_24_8 */
-/* reuse GL_DEPTH24_STENCIL8 */
-/* reuse GL_TEXTURE_STENCIL_SIZE */
-/* reuse GL_TEXTURE_RED_TYPE */
-/* reuse GL_TEXTURE_GREEN_TYPE */
-/* reuse GL_TEXTURE_BLUE_TYPE */
-/* reuse GL_TEXTURE_ALPHA_TYPE */
-/* reuse GL_TEXTURE_DEPTH_TYPE */
-/* reuse GL_UNSIGNED_NORMALIZED */
-/* reuse GL_FRAMEBUFFER_BINDING */
-/* reuse GL_DRAW_FRAMEBUFFER_BINDING */
-/* reuse GL_RENDERBUFFER_BINDING */
-/* reuse GL_READ_FRAMEBUFFER */
-/* reuse GL_DRAW_FRAMEBUFFER */
-/* reuse GL_READ_FRAMEBUFFER_BINDING */
-/* reuse GL_RENDERBUFFER_SAMPLES */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER */
-/* reuse GL_FRAMEBUFFER_COMPLETE */
-/* reuse GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT */
-/* reuse GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT */
-/* reuse GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER */
-/* reuse GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER */
-/* reuse GL_FRAMEBUFFER_UNSUPPORTED */
-/* reuse GL_MAX_COLOR_ATTACHMENTS */
-/* reuse GL_COLOR_ATTACHMENT0 */
-/* reuse GL_COLOR_ATTACHMENT1 */
-/* reuse GL_COLOR_ATTACHMENT2 */
-/* reuse GL_COLOR_ATTACHMENT3 */
-/* reuse GL_COLOR_ATTACHMENT4 */
-/* reuse GL_COLOR_ATTACHMENT5 */
-/* reuse GL_COLOR_ATTACHMENT6 */
-/* reuse GL_COLOR_ATTACHMENT7 */
-/* reuse GL_COLOR_ATTACHMENT8 */
-/* reuse GL_COLOR_ATTACHMENT9 */
-/* reuse GL_COLOR_ATTACHMENT10 */
-/* reuse GL_COLOR_ATTACHMENT11 */
-/* reuse GL_COLOR_ATTACHMENT12 */
-/* reuse GL_COLOR_ATTACHMENT13 */
-/* reuse GL_COLOR_ATTACHMENT14 */
-/* reuse GL_COLOR_ATTACHMENT15 */
-/* reuse GL_DEPTH_ATTACHMENT */
-/* reuse GL_STENCIL_ATTACHMENT */
-/* reuse GL_FRAMEBUFFER */
-/* reuse GL_RENDERBUFFER */
-/* reuse GL_RENDERBUFFER_WIDTH */
-/* reuse GL_RENDERBUFFER_HEIGHT */
-/* reuse GL_RENDERBUFFER_INTERNAL_FORMAT */
-/* reuse GL_STENCIL_INDEX1 */
-/* reuse GL_STENCIL_INDEX4 */
-/* reuse GL_STENCIL_INDEX8 */
-/* reuse GL_STENCIL_INDEX16 */
-/* reuse GL_RENDERBUFFER_RED_SIZE */
-/* reuse GL_RENDERBUFFER_GREEN_SIZE */
-/* reuse GL_RENDERBUFFER_BLUE_SIZE */
-/* reuse GL_RENDERBUFFER_ALPHA_SIZE */
-/* reuse GL_RENDERBUFFER_DEPTH_SIZE */
-/* reuse GL_RENDERBUFFER_STENCIL_SIZE */
-/* reuse GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE */
-/* reuse GL_MAX_SAMPLES */
-/* Reuse tokens from ARB_framebuffer_sRGB */
-/* reuse GL_FRAMEBUFFER_SRGB */
-/* Reuse tokens from ARB_half_float_vertex */
-/* reuse GL_HALF_FLOAT */
-/* Reuse tokens from ARB_map_buffer_range */
-/* reuse GL_MAP_READ_BIT */
-/* reuse GL_MAP_WRITE_BIT */
-/* reuse GL_MAP_INVALIDATE_RANGE_BIT */
-/* reuse GL_MAP_INVALIDATE_BUFFER_BIT */
-/* reuse GL_MAP_FLUSH_EXPLICIT_BIT */
-/* reuse GL_MAP_UNSYNCHRONIZED_BIT */
-/* Reuse tokens from ARB_texture_compression_rgtc */
-/* reuse GL_COMPRESSED_RED_RGTC1 */
-/* reuse GL_COMPRESSED_SIGNED_RED_RGTC1 */
-/* reuse GL_COMPRESSED_RG_RGTC2 */
-/* reuse GL_COMPRESSED_SIGNED_RG_RGTC2 */
-/* Reuse tokens from ARB_texture_rg */
-/* reuse GL_RG */
-/* reuse GL_RG_INTEGER */
-/* reuse GL_R8 */
-/* reuse GL_R16 */
-/* reuse GL_RG8 */
-/* reuse GL_RG16 */
-/* reuse GL_R16F */
-/* reuse GL_R32F */
-/* reuse GL_RG16F */
-/* reuse GL_RG32F */
-/* reuse GL_R8I */
-/* reuse GL_R8UI */
-/* reuse GL_R16I */
-/* reuse GL_R16UI */
-/* reuse GL_R32I */
-/* reuse GL_R32UI */
-/* reuse GL_RG8I */
-/* reuse GL_RG8UI */
-/* reuse GL_RG16I */
-/* reuse GL_RG16UI */
-/* reuse GL_RG32I */
-/* reuse GL_RG32UI */
-/* Reuse tokens from ARB_vertex_array_object */
-/* reuse GL_VERTEX_ARRAY_BINDING */
-#endif
-
-#ifndef GL_VERSION_3_0_DEPRECATED
-#define GL_CLAMP_VERTEX_COLOR 0x891A
-#define GL_CLAMP_FRAGMENT_COLOR 0x891B
-#define GL_ALPHA_INTEGER 0x8D97
-/* Reuse tokens from ARB_framebuffer_object */
-/* reuse GL_TEXTURE_LUMINANCE_TYPE */
-/* reuse GL_TEXTURE_INTENSITY_TYPE */
-#endif
-
-#ifndef GL_VERSION_3_1
-#define GL_SAMPLER_2D_RECT 0x8B63
-#define GL_SAMPLER_2D_RECT_SHADOW 0x8B64
-#define GL_SAMPLER_BUFFER 0x8DC2
-#define GL_INT_SAMPLER_2D_RECT 0x8DCD
-#define GL_INT_SAMPLER_BUFFER 0x8DD0
-#define GL_UNSIGNED_INT_SAMPLER_2D_RECT 0x8DD5
-#define GL_UNSIGNED_INT_SAMPLER_BUFFER 0x8DD8
-#define GL_TEXTURE_BUFFER 0x8C2A
-#define GL_MAX_TEXTURE_BUFFER_SIZE 0x8C2B
-#define GL_TEXTURE_BINDING_BUFFER 0x8C2C
-#define GL_TEXTURE_BUFFER_DATA_STORE_BINDING 0x8C2D
-#define GL_TEXTURE_BUFFER_FORMAT 0x8C2E
-#define GL_TEXTURE_RECTANGLE 0x84F5
-#define GL_TEXTURE_BINDING_RECTANGLE 0x84F6
-#define GL_PROXY_TEXTURE_RECTANGLE 0x84F7
-#define GL_MAX_RECTANGLE_TEXTURE_SIZE 0x84F8
-#define GL_RED_SNORM 0x8F90
-#define GL_RG_SNORM 0x8F91
-#define GL_RGB_SNORM 0x8F92
-#define GL_RGBA_SNORM 0x8F93
-#define GL_R8_SNORM 0x8F94
-#define GL_RG8_SNORM 0x8F95
-#define GL_RGB8_SNORM 0x8F96
-#define GL_RGBA8_SNORM 0x8F97
-#define GL_R16_SNORM 0x8F98
-#define GL_RG16_SNORM 0x8F99
-#define GL_RGB16_SNORM 0x8F9A
-#define GL_RGBA16_SNORM 0x8F9B
-#define GL_SIGNED_NORMALIZED 0x8F9C
-#define GL_PRIMITIVE_RESTART 0x8F9D
-#define GL_PRIMITIVE_RESTART_INDEX 0x8F9E
-/* Reuse tokens from ARB_copy_buffer */
-/* reuse GL_COPY_READ_BUFFER */
-/* reuse GL_COPY_WRITE_BUFFER */
-/* Reuse tokens from ARB_draw_instanced (none) */
-/* Reuse tokens from ARB_uniform_buffer_object */
-/* reuse GL_UNIFORM_BUFFER */
-/* reuse GL_UNIFORM_BUFFER_BINDING */
-/* reuse GL_UNIFORM_BUFFER_START */
-/* reuse GL_UNIFORM_BUFFER_SIZE */
-/* reuse GL_MAX_VERTEX_UNIFORM_BLOCKS */
-/* reuse GL_MAX_FRAGMENT_UNIFORM_BLOCKS */
-/* reuse GL_MAX_COMBINED_UNIFORM_BLOCKS */
-/* reuse GL_MAX_UNIFORM_BUFFER_BINDINGS */
-/* reuse GL_MAX_UNIFORM_BLOCK_SIZE */
-/* reuse GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS */
-/* reuse GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS */
-/* reuse GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT */
-/* reuse GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH */
-/* reuse GL_ACTIVE_UNIFORM_BLOCKS */
-/* reuse GL_UNIFORM_TYPE */
-/* reuse GL_UNIFORM_SIZE */
-/* reuse GL_UNIFORM_NAME_LENGTH */
-/* reuse GL_UNIFORM_BLOCK_INDEX */
-/* reuse GL_UNIFORM_OFFSET */
-/* reuse GL_UNIFORM_ARRAY_STRIDE */
-/* reuse GL_UNIFORM_MATRIX_STRIDE */
-/* reuse GL_UNIFORM_IS_ROW_MAJOR */
-/* reuse GL_UNIFORM_BLOCK_BINDING */
-/* reuse GL_UNIFORM_BLOCK_DATA_SIZE */
-/* reuse GL_UNIFORM_BLOCK_NAME_LENGTH */
-/* reuse GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS */
-/* reuse GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES */
-/* reuse GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER */
-/* reuse GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER */
-/* reuse GL_INVALID_INDEX */
-#endif
-
-#ifndef GL_VERSION_3_2
-#define GL_CONTEXT_CORE_PROFILE_BIT 0x00000001
-#define GL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002
-#define GL_LINES_ADJACENCY 0x000A
-#define GL_LINE_STRIP_ADJACENCY 0x000B
-#define GL_TRIANGLES_ADJACENCY 0x000C
-#define GL_TRIANGLE_STRIP_ADJACENCY 0x000D
-#define GL_PROGRAM_POINT_SIZE 0x8642
-#define GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS 0x8C29
-#define GL_FRAMEBUFFER_ATTACHMENT_LAYERED 0x8DA7
-#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS 0x8DA8
-#define GL_GEOMETRY_SHADER 0x8DD9
-#define GL_GEOMETRY_VERTICES_OUT 0x8916
-#define GL_GEOMETRY_INPUT_TYPE 0x8917
-#define GL_GEOMETRY_OUTPUT_TYPE 0x8918
-#define GL_MAX_GEOMETRY_UNIFORM_COMPONENTS 0x8DDF
-#define GL_MAX_GEOMETRY_OUTPUT_VERTICES 0x8DE0
-#define GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS 0x8DE1
-#define GL_MAX_VERTEX_OUTPUT_COMPONENTS 0x9122
-#define GL_MAX_GEOMETRY_INPUT_COMPONENTS 0x9123
-#define GL_MAX_GEOMETRY_OUTPUT_COMPONENTS 0x9124
-#define GL_MAX_FRAGMENT_INPUT_COMPONENTS 0x9125
-#define GL_CONTEXT_PROFILE_MASK 0x9126
-/* reuse GL_MAX_VARYING_COMPONENTS */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER */
-/* Reuse tokens from ARB_depth_clamp */
-/* reuse GL_DEPTH_CLAMP */
-/* Reuse tokens from ARB_draw_elements_base_vertex (none) */
-/* Reuse tokens from ARB_fragment_coord_conventions (none) */
-/* Reuse tokens from ARB_provoking_vertex */
-/* reuse GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION */
-/* reuse GL_FIRST_VERTEX_CONVENTION */
-/* reuse GL_LAST_VERTEX_CONVENTION */
-/* reuse GL_PROVOKING_VERTEX */
-/* Reuse tokens from ARB_seamless_cube_map */
-/* reuse GL_TEXTURE_CUBE_MAP_SEAMLESS */
-/* Reuse tokens from ARB_sync */
-/* reuse GL_MAX_SERVER_WAIT_TIMEOUT */
-/* reuse GL_OBJECT_TYPE */
-/* reuse GL_SYNC_CONDITION */
-/* reuse GL_SYNC_STATUS */
-/* reuse GL_SYNC_FLAGS */
-/* reuse GL_SYNC_FENCE */
-/* reuse GL_SYNC_GPU_COMMANDS_COMPLETE */
-/* reuse GL_UNSIGNALED */
-/* reuse GL_SIGNALED */
-/* reuse GL_ALREADY_SIGNALED */
-/* reuse GL_TIMEOUT_EXPIRED */
-/* reuse GL_CONDITION_SATISFIED */
-/* reuse GL_WAIT_FAILED */
-/* reuse GL_TIMEOUT_IGNORED */
-/* reuse GL_SYNC_FLUSH_COMMANDS_BIT */
-/* reuse GL_TIMEOUT_IGNORED */
-/* Reuse tokens from ARB_texture_multisample */
-/* reuse GL_SAMPLE_POSITION */
-/* reuse GL_SAMPLE_MASK */
-/* reuse GL_SAMPLE_MASK_VALUE */
-/* reuse GL_MAX_SAMPLE_MASK_WORDS */
-/* reuse GL_TEXTURE_2D_MULTISAMPLE */
-/* reuse GL_PROXY_TEXTURE_2D_MULTISAMPLE */
-/* reuse GL_TEXTURE_2D_MULTISAMPLE_ARRAY */
-/* reuse GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY */
-/* reuse GL_TEXTURE_BINDING_2D_MULTISAMPLE */
-/* reuse GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY */
-/* reuse GL_TEXTURE_SAMPLES */
-/* reuse GL_TEXTURE_FIXED_SAMPLE_LOCATIONS */
-/* reuse GL_SAMPLER_2D_MULTISAMPLE */
-/* reuse GL_INT_SAMPLER_2D_MULTISAMPLE */
-/* reuse GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE */
-/* reuse GL_SAMPLER_2D_MULTISAMPLE_ARRAY */
-/* reuse GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY */
-/* reuse GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY */
-/* reuse GL_MAX_COLOR_TEXTURE_SAMPLES */
-/* reuse GL_MAX_DEPTH_TEXTURE_SAMPLES */
-/* reuse GL_MAX_INTEGER_SAMPLES */
-/* Don't need to reuse tokens from ARB_vertex_array_bgra since they're already in 1.2 core */
-#endif
-
-#ifndef GL_VERSION_3_3
-#define GL_VERTEX_ATTRIB_ARRAY_DIVISOR 0x88FE
-/* Reuse tokens from ARB_blend_func_extended */
-/* reuse GL_SRC1_COLOR */
-/* reuse GL_ONE_MINUS_SRC1_COLOR */
-/* reuse GL_ONE_MINUS_SRC1_ALPHA */
-/* reuse GL_MAX_DUAL_SOURCE_DRAW_BUFFERS */
-/* Reuse tokens from ARB_explicit_attrib_location (none) */
-/* Reuse tokens from ARB_occlusion_query2 */
-/* reuse GL_ANY_SAMPLES_PASSED */
-/* Reuse tokens from ARB_sampler_objects */
-/* reuse GL_SAMPLER_BINDING */
-/* Reuse tokens from ARB_shader_bit_encoding (none) */
-/* Reuse tokens from ARB_texture_rgb10_a2ui */
-/* reuse GL_RGB10_A2UI */
-/* Reuse tokens from ARB_texture_swizzle */
-/* reuse GL_TEXTURE_SWIZZLE_R */
-/* reuse GL_TEXTURE_SWIZZLE_G */
-/* reuse GL_TEXTURE_SWIZZLE_B */
-/* reuse GL_TEXTURE_SWIZZLE_A */
-/* reuse GL_TEXTURE_SWIZZLE_RGBA */
-/* Reuse tokens from ARB_timer_query */
-/* reuse GL_TIME_ELAPSED */
-/* reuse GL_TIMESTAMP */
-/* Reuse tokens from ARB_vertex_type_2_10_10_10_rev */
-/* reuse GL_INT_2_10_10_10_REV */
-#endif
-
-#ifndef GL_VERSION_4_0
-#define GL_SAMPLE_SHADING 0x8C36
-#define GL_MIN_SAMPLE_SHADING_VALUE 0x8C37
-#define GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET 0x8E5E
-#define GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET 0x8E5F
-#define GL_TEXTURE_CUBE_MAP_ARRAY 0x9009
-#define GL_TEXTURE_BINDING_CUBE_MAP_ARRAY 0x900A
-#define GL_PROXY_TEXTURE_CUBE_MAP_ARRAY 0x900B
-#define GL_SAMPLER_CUBE_MAP_ARRAY 0x900C
-#define GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW 0x900D
-#define GL_INT_SAMPLER_CUBE_MAP_ARRAY 0x900E
-#define GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY 0x900F
-/* Reuse tokens from ARB_texture_query_lod (none) */
-/* Reuse tokens from ARB_draw_buffers_blend (none) */
-/* Reuse tokens from ARB_draw_indirect */
-/* reuse GL_DRAW_INDIRECT_BUFFER */
-/* reuse GL_DRAW_INDIRECT_BUFFER_BINDING */
-/* Reuse tokens from ARB_gpu_shader5 */
-/* reuse GL_GEOMETRY_SHADER_INVOCATIONS */
-/* reuse GL_MAX_GEOMETRY_SHADER_INVOCATIONS */
-/* reuse GL_MIN_FRAGMENT_INTERPOLATION_OFFSET */
-/* reuse GL_MAX_FRAGMENT_INTERPOLATION_OFFSET */
-/* reuse GL_FRAGMENT_INTERPOLATION_OFFSET_BITS */
-/* reuse GL_MAX_VERTEX_STREAMS */
-/* Reuse tokens from ARB_gpu_shader_fp64 */
-/* reuse GL_DOUBLE_VEC2 */
-/* reuse GL_DOUBLE_VEC3 */
-/* reuse GL_DOUBLE_VEC4 */
-/* reuse GL_DOUBLE_MAT2 */
-/* reuse GL_DOUBLE_MAT3 */
-/* reuse GL_DOUBLE_MAT4 */
-/* reuse GL_DOUBLE_MAT2x3 */
-/* reuse GL_DOUBLE_MAT2x4 */
-/* reuse GL_DOUBLE_MAT3x2 */
-/* reuse GL_DOUBLE_MAT3x4 */
-/* reuse GL_DOUBLE_MAT4x2 */
-/* reuse GL_DOUBLE_MAT4x3 */
-/* Reuse tokens from ARB_shader_subroutine */
-/* reuse GL_ACTIVE_SUBROUTINES */
-/* reuse GL_ACTIVE_SUBROUTINE_UNIFORMS */
-/* reuse GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS */
-/* reuse GL_ACTIVE_SUBROUTINE_MAX_LENGTH */
-/* reuse GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH */
-/* reuse GL_MAX_SUBROUTINES */
-/* reuse GL_MAX_SUBROUTINE_UNIFORM_LOCATIONS */
-/* reuse GL_NUM_COMPATIBLE_SUBROUTINES */
-/* reuse GL_COMPATIBLE_SUBROUTINES */
-/* Reuse tokens from ARB_tessellation_shader */
-/* reuse GL_PATCHES */
-/* reuse GL_PATCH_VERTICES */
-/* reuse GL_PATCH_DEFAULT_INNER_LEVEL */
-/* reuse GL_PATCH_DEFAULT_OUTER_LEVEL */
-/* reuse GL_TESS_CONTROL_OUTPUT_VERTICES */
-/* reuse GL_TESS_GEN_MODE */
-/* reuse GL_TESS_GEN_SPACING */
-/* reuse GL_TESS_GEN_VERTEX_ORDER */
-/* reuse GL_TESS_GEN_POINT_MODE */
-/* reuse GL_ISOLINES */
-/* reuse GL_FRACTIONAL_ODD */
-/* reuse GL_FRACTIONAL_EVEN */
-/* reuse GL_MAX_PATCH_VERTICES */
-/* reuse GL_MAX_TESS_GEN_LEVEL */
-/* reuse GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS */
-/* reuse GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS */
-/* reuse GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS */
-/* reuse GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS */
-/* reuse GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS */
-/* reuse GL_MAX_TESS_PATCH_COMPONENTS */
-/* reuse GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS */
-/* reuse GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS */
-/* reuse GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS */
-/* reuse GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS */
-/* reuse GL_MAX_TESS_CONTROL_INPUT_COMPONENTS */
-/* reuse GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS */
-/* reuse GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS */
-/* reuse GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS */
-/* reuse GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER */
-/* reuse GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER */
-/* reuse GL_TESS_EVALUATION_SHADER */
-/* reuse GL_TESS_CONTROL_SHADER */
-/* Reuse tokens from ARB_texture_buffer_object_rgb32 (none) */
-/* Reuse tokens from ARB_transform_feedback2 */
-/* reuse GL_TRANSFORM_FEEDBACK */
-/* reuse GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED */
-/* reuse GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE */
-/* reuse GL_TRANSFORM_FEEDBACK_BINDING */
-/* Reuse tokens from ARB_transform_feedback3 */
-/* reuse GL_MAX_TRANSFORM_FEEDBACK_BUFFERS */
-/* reuse GL_MAX_VERTEX_STREAMS */
-#endif
-
-#ifndef GL_VERSION_4_1
-/* Reuse tokens from ARB_ES2_compatibility */
-/* reuse GL_FIXED */
-/* reuse GL_IMPLEMENTATION_COLOR_READ_TYPE */
-/* reuse GL_IMPLEMENTATION_COLOR_READ_FORMAT */
-/* reuse GL_LOW_FLOAT */
-/* reuse GL_MEDIUM_FLOAT */
-/* reuse GL_HIGH_FLOAT */
-/* reuse GL_LOW_INT */
-/* reuse GL_MEDIUM_INT */
-/* reuse GL_HIGH_INT */
-/* reuse GL_SHADER_COMPILER */
-/* reuse GL_NUM_SHADER_BINARY_FORMATS */
-/* reuse GL_MAX_VERTEX_UNIFORM_VECTORS */
-/* reuse GL_MAX_VARYING_VECTORS */
-/* reuse GL_MAX_FRAGMENT_UNIFORM_VECTORS */
-/* Reuse tokens from ARB_get_program_binary */
-/* reuse GL_PROGRAM_BINARY_RETRIEVABLE_HINT */
-/* reuse GL_PROGRAM_BINARY_LENGTH */
-/* reuse GL_NUM_PROGRAM_BINARY_FORMATS */
-/* reuse GL_PROGRAM_BINARY_FORMATS */
-/* Reuse tokens from ARB_separate_shader_objects */
-/* reuse GL_VERTEX_SHADER_BIT */
-/* reuse GL_FRAGMENT_SHADER_BIT */
-/* reuse GL_GEOMETRY_SHADER_BIT */
-/* reuse GL_TESS_CONTROL_SHADER_BIT */
-/* reuse GL_TESS_EVALUATION_SHADER_BIT */
-/* reuse GL_ALL_SHADER_BITS */
-/* reuse GL_PROGRAM_SEPARABLE */
-/* reuse GL_ACTIVE_PROGRAM */
-/* reuse GL_PROGRAM_PIPELINE_BINDING */
-/* Reuse tokens from ARB_shader_precision (none) */
-/* Reuse tokens from ARB_vertex_attrib_64bit - all are in GL 3.0 and 4.0 already */
-/* Reuse tokens from ARB_viewport_array - some are in GL 1.1 and ARB_provoking_vertex already */
-/* reuse GL_MAX_VIEWPORTS */
-/* reuse GL_VIEWPORT_SUBPIXEL_BITS */
-/* reuse GL_VIEWPORT_BOUNDS_RANGE */
-/* reuse GL_LAYER_PROVOKING_VERTEX */
-/* reuse GL_VIEWPORT_INDEX_PROVOKING_VERTEX */
-/* reuse GL_UNDEFINED_VERTEX */
-#endif
-
-#ifndef GL_ARB_multitexture
-#define GL_TEXTURE0_ARB 0x84C0
-#define GL_TEXTURE1_ARB 0x84C1
-#define GL_TEXTURE2_ARB 0x84C2
-#define GL_TEXTURE3_ARB 0x84C3
-#define GL_TEXTURE4_ARB 0x84C4
-#define GL_TEXTURE5_ARB 0x84C5
-#define GL_TEXTURE6_ARB 0x84C6
-#define GL_TEXTURE7_ARB 0x84C7
-#define GL_TEXTURE8_ARB 0x84C8
-#define GL_TEXTURE9_ARB 0x84C9
-#define GL_TEXTURE10_ARB 0x84CA
-#define GL_TEXTURE11_ARB 0x84CB
-#define GL_TEXTURE12_ARB 0x84CC
-#define GL_TEXTURE13_ARB 0x84CD
-#define GL_TEXTURE14_ARB 0x84CE
-#define GL_TEXTURE15_ARB 0x84CF
-#define GL_TEXTURE16_ARB 0x84D0
-#define GL_TEXTURE17_ARB 0x84D1
-#define GL_TEXTURE18_ARB 0x84D2
-#define GL_TEXTURE19_ARB 0x84D3
-#define GL_TEXTURE20_ARB 0x84D4
-#define GL_TEXTURE21_ARB 0x84D5
-#define GL_TEXTURE22_ARB 0x84D6
-#define GL_TEXTURE23_ARB 0x84D7
-#define GL_TEXTURE24_ARB 0x84D8
-#define GL_TEXTURE25_ARB 0x84D9
-#define GL_TEXTURE26_ARB 0x84DA
-#define GL_TEXTURE27_ARB 0x84DB
-#define GL_TEXTURE28_ARB 0x84DC
-#define GL_TEXTURE29_ARB 0x84DD
-#define GL_TEXTURE30_ARB 0x84DE
-#define GL_TEXTURE31_ARB 0x84DF
-#define GL_ACTIVE_TEXTURE_ARB 0x84E0
-#define GL_CLIENT_ACTIVE_TEXTURE_ARB 0x84E1
-#define GL_MAX_TEXTURE_UNITS_ARB 0x84E2
-#endif
-
-#ifndef GL_ARB_transpose_matrix
-#define GL_TRANSPOSE_MODELVIEW_MATRIX_ARB 0x84E3
-#define GL_TRANSPOSE_PROJECTION_MATRIX_ARB 0x84E4
-#define GL_TRANSPOSE_TEXTURE_MATRIX_ARB 0x84E5
-#define GL_TRANSPOSE_COLOR_MATRIX_ARB 0x84E6
-#endif
-
-#ifndef GL_ARB_multisample
-#define GL_MULTISAMPLE_ARB 0x809D
-#define GL_SAMPLE_ALPHA_TO_COVERAGE_ARB 0x809E
-#define GL_SAMPLE_ALPHA_TO_ONE_ARB 0x809F
-#define GL_SAMPLE_COVERAGE_ARB 0x80A0
-#define GL_SAMPLE_BUFFERS_ARB 0x80A8
-#define GL_SAMPLES_ARB 0x80A9
-#define GL_SAMPLE_COVERAGE_VALUE_ARB 0x80AA
-#define GL_SAMPLE_COVERAGE_INVERT_ARB 0x80AB
-#define GL_MULTISAMPLE_BIT_ARB 0x20000000
-#endif
-
-#ifndef GL_ARB_texture_env_add
-#endif
-
-#ifndef GL_ARB_texture_cube_map
-#define GL_NORMAL_MAP_ARB 0x8511
-#define GL_REFLECTION_MAP_ARB 0x8512
-#define GL_TEXTURE_CUBE_MAP_ARB 0x8513
-#define GL_TEXTURE_BINDING_CUBE_MAP_ARB 0x8514
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x8515
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x8516
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x8517
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x8518
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x8519
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x851A
-#define GL_PROXY_TEXTURE_CUBE_MAP_ARB 0x851B
-#define GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB 0x851C
-#endif
-
-#ifndef GL_ARB_texture_compression
-#define GL_COMPRESSED_ALPHA_ARB 0x84E9
-#define GL_COMPRESSED_LUMINANCE_ARB 0x84EA
-#define GL_COMPRESSED_LUMINANCE_ALPHA_ARB 0x84EB
-#define GL_COMPRESSED_INTENSITY_ARB 0x84EC
-#define GL_COMPRESSED_RGB_ARB 0x84ED
-#define GL_COMPRESSED_RGBA_ARB 0x84EE
-#define GL_TEXTURE_COMPRESSION_HINT_ARB 0x84EF
-#define GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB 0x86A0
-#define GL_TEXTURE_COMPRESSED_ARB 0x86A1
-#define GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB 0x86A2
-#define GL_COMPRESSED_TEXTURE_FORMATS_ARB 0x86A3
-#endif
-
-#ifndef GL_ARB_texture_border_clamp
-#define GL_CLAMP_TO_BORDER_ARB 0x812D
-#endif
-
-#ifndef GL_ARB_point_parameters
-#define GL_POINT_SIZE_MIN_ARB 0x8126
-#define GL_POINT_SIZE_MAX_ARB 0x8127
-#define GL_POINT_FADE_THRESHOLD_SIZE_ARB 0x8128
-#define GL_POINT_DISTANCE_ATTENUATION_ARB 0x8129
-#endif
-
-#ifndef GL_ARB_vertex_blend
-#define GL_MAX_VERTEX_UNITS_ARB 0x86A4
-#define GL_ACTIVE_VERTEX_UNITS_ARB 0x86A5
-#define GL_WEIGHT_SUM_UNITY_ARB 0x86A6
-#define GL_VERTEX_BLEND_ARB 0x86A7
-#define GL_CURRENT_WEIGHT_ARB 0x86A8
-#define GL_WEIGHT_ARRAY_TYPE_ARB 0x86A9
-#define GL_WEIGHT_ARRAY_STRIDE_ARB 0x86AA
-#define GL_WEIGHT_ARRAY_SIZE_ARB 0x86AB
-#define GL_WEIGHT_ARRAY_POINTER_ARB 0x86AC
-#define GL_WEIGHT_ARRAY_ARB 0x86AD
-#define GL_MODELVIEW0_ARB 0x1700
-#define GL_MODELVIEW1_ARB 0x850A
-#define GL_MODELVIEW2_ARB 0x8722
-#define GL_MODELVIEW3_ARB 0x8723
-#define GL_MODELVIEW4_ARB 0x8724
-#define GL_MODELVIEW5_ARB 0x8725
-#define GL_MODELVIEW6_ARB 0x8726
-#define GL_MODELVIEW7_ARB 0x8727
-#define GL_MODELVIEW8_ARB 0x8728
-#define GL_MODELVIEW9_ARB 0x8729
-#define GL_MODELVIEW10_ARB 0x872A
-#define GL_MODELVIEW11_ARB 0x872B
-#define GL_MODELVIEW12_ARB 0x872C
-#define GL_MODELVIEW13_ARB 0x872D
-#define GL_MODELVIEW14_ARB 0x872E
-#define GL_MODELVIEW15_ARB 0x872F
-#define GL_MODELVIEW16_ARB 0x8730
-#define GL_MODELVIEW17_ARB 0x8731
-#define GL_MODELVIEW18_ARB 0x8732
-#define GL_MODELVIEW19_ARB 0x8733
-#define GL_MODELVIEW20_ARB 0x8734
-#define GL_MODELVIEW21_ARB 0x8735
-#define GL_MODELVIEW22_ARB 0x8736
-#define GL_MODELVIEW23_ARB 0x8737
-#define GL_MODELVIEW24_ARB 0x8738
-#define GL_MODELVIEW25_ARB 0x8739
-#define GL_MODELVIEW26_ARB 0x873A
-#define GL_MODELVIEW27_ARB 0x873B
-#define GL_MODELVIEW28_ARB 0x873C
-#define GL_MODELVIEW29_ARB 0x873D
-#define GL_MODELVIEW30_ARB 0x873E
-#define GL_MODELVIEW31_ARB 0x873F
-#endif
-
-#ifndef GL_ARB_matrix_palette
-#define GL_MATRIX_PALETTE_ARB 0x8840
-#define GL_MAX_MATRIX_PALETTE_STACK_DEPTH_ARB 0x8841
-#define GL_MAX_PALETTE_MATRICES_ARB 0x8842
-#define GL_CURRENT_PALETTE_MATRIX_ARB 0x8843
-#define GL_MATRIX_INDEX_ARRAY_ARB 0x8844
-#define GL_CURRENT_MATRIX_INDEX_ARB 0x8845
-#define GL_MATRIX_INDEX_ARRAY_SIZE_ARB 0x8846
-#define GL_MATRIX_INDEX_ARRAY_TYPE_ARB 0x8847
-#define GL_MATRIX_INDEX_ARRAY_STRIDE_ARB 0x8848
-#define GL_MATRIX_INDEX_ARRAY_POINTER_ARB 0x8849
-#endif
-
-#ifndef GL_ARB_texture_env_combine
-#define GL_COMBINE_ARB 0x8570
-#define GL_COMBINE_RGB_ARB 0x8571
-#define GL_COMBINE_ALPHA_ARB 0x8572
-#define GL_SOURCE0_RGB_ARB 0x8580
-#define GL_SOURCE1_RGB_ARB 0x8581
-#define GL_SOURCE2_RGB_ARB 0x8582
-#define GL_SOURCE0_ALPHA_ARB 0x8588
-#define GL_SOURCE1_ALPHA_ARB 0x8589
-#define GL_SOURCE2_ALPHA_ARB 0x858A
-#define GL_OPERAND0_RGB_ARB 0x8590
-#define GL_OPERAND1_RGB_ARB 0x8591
-#define GL_OPERAND2_RGB_ARB 0x8592
-#define GL_OPERAND0_ALPHA_ARB 0x8598
-#define GL_OPERAND1_ALPHA_ARB 0x8599
-#define GL_OPERAND2_ALPHA_ARB 0x859A
-#define GL_RGB_SCALE_ARB 0x8573
-#define GL_ADD_SIGNED_ARB 0x8574
-#define GL_INTERPOLATE_ARB 0x8575
-#define GL_SUBTRACT_ARB 0x84E7
-#define GL_CONSTANT_ARB 0x8576
-#define GL_PRIMARY_COLOR_ARB 0x8577
-#define GL_PREVIOUS_ARB 0x8578
-#endif
-
-#ifndef GL_ARB_texture_env_crossbar
-#endif
-
-#ifndef GL_ARB_texture_env_dot3
-#define GL_DOT3_RGB_ARB 0x86AE
-#define GL_DOT3_RGBA_ARB 0x86AF
-#endif
-
-#ifndef GL_ARB_texture_mirrored_repeat
-#define GL_MIRRORED_REPEAT_ARB 0x8370
-#endif
-
-#ifndef GL_ARB_depth_texture
-#define GL_DEPTH_COMPONENT16_ARB 0x81A5
-#define GL_DEPTH_COMPONENT24_ARB 0x81A6
-#define GL_DEPTH_COMPONENT32_ARB 0x81A7
-#define GL_TEXTURE_DEPTH_SIZE_ARB 0x884A
-#define GL_DEPTH_TEXTURE_MODE_ARB 0x884B
-#endif
-
-#ifndef GL_ARB_shadow
-#define GL_TEXTURE_COMPARE_MODE_ARB 0x884C
-#define GL_TEXTURE_COMPARE_FUNC_ARB 0x884D
-#define GL_COMPARE_R_TO_TEXTURE_ARB 0x884E
-#endif
-
-#ifndef GL_ARB_shadow_ambient
-#define GL_TEXTURE_COMPARE_FAIL_VALUE_ARB 0x80BF
-#endif
-
-#ifndef GL_ARB_window_pos
-#endif
-
-#ifndef GL_ARB_vertex_program
-#define GL_COLOR_SUM_ARB 0x8458
-#define GL_VERTEX_PROGRAM_ARB 0x8620
-#define GL_VERTEX_ATTRIB_ARRAY_ENABLED_ARB 0x8622
-#define GL_VERTEX_ATTRIB_ARRAY_SIZE_ARB 0x8623
-#define GL_VERTEX_ATTRIB_ARRAY_STRIDE_ARB 0x8624
-#define GL_VERTEX_ATTRIB_ARRAY_TYPE_ARB 0x8625
-#define GL_CURRENT_VERTEX_ATTRIB_ARB 0x8626
-#define GL_PROGRAM_LENGTH_ARB 0x8627
-#define GL_PROGRAM_STRING_ARB 0x8628
-#define GL_MAX_PROGRAM_MATRIX_STACK_DEPTH_ARB 0x862E
-#define GL_MAX_PROGRAM_MATRICES_ARB 0x862F
-#define GL_CURRENT_MATRIX_STACK_DEPTH_ARB 0x8640
-#define GL_CURRENT_MATRIX_ARB 0x8641
-#define GL_VERTEX_PROGRAM_POINT_SIZE_ARB 0x8642
-#define GL_VERTEX_PROGRAM_TWO_SIDE_ARB 0x8643
-#define GL_VERTEX_ATTRIB_ARRAY_POINTER_ARB 0x8645
-#define GL_PROGRAM_ERROR_POSITION_ARB 0x864B
-#define GL_PROGRAM_BINDING_ARB 0x8677
-#define GL_MAX_VERTEX_ATTRIBS_ARB 0x8869
-#define GL_VERTEX_ATTRIB_ARRAY_NORMALIZED_ARB 0x886A
-#define GL_PROGRAM_ERROR_STRING_ARB 0x8874
-#define GL_PROGRAM_FORMAT_ASCII_ARB 0x8875
-#define GL_PROGRAM_FORMAT_ARB 0x8876
-#define GL_PROGRAM_INSTRUCTIONS_ARB 0x88A0
-#define GL_MAX_PROGRAM_INSTRUCTIONS_ARB 0x88A1
-#define GL_PROGRAM_NATIVE_INSTRUCTIONS_ARB 0x88A2
-#define GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB 0x88A3
-#define GL_PROGRAM_TEMPORARIES_ARB 0x88A4
-#define GL_MAX_PROGRAM_TEMPORARIES_ARB 0x88A5
-#define GL_PROGRAM_NATIVE_TEMPORARIES_ARB 0x88A6
-#define GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB 0x88A7
-#define GL_PROGRAM_PARAMETERS_ARB 0x88A8
-#define GL_MAX_PROGRAM_PARAMETERS_ARB 0x88A9
-#define GL_PROGRAM_NATIVE_PARAMETERS_ARB 0x88AA
-#define GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB 0x88AB
-#define GL_PROGRAM_ATTRIBS_ARB 0x88AC
-#define GL_MAX_PROGRAM_ATTRIBS_ARB 0x88AD
-#define GL_PROGRAM_NATIVE_ATTRIBS_ARB 0x88AE
-#define GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB 0x88AF
-#define GL_PROGRAM_ADDRESS_REGISTERS_ARB 0x88B0
-#define GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB 0x88B1
-#define GL_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB 0x88B2
-#define GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB 0x88B3
-#define GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB 0x88B4
-#define GL_MAX_PROGRAM_ENV_PARAMETERS_ARB 0x88B5
-#define GL_PROGRAM_UNDER_NATIVE_LIMITS_ARB 0x88B6
-#define GL_TRANSPOSE_CURRENT_MATRIX_ARB 0x88B7
-#define GL_MATRIX0_ARB 0x88C0
-#define GL_MATRIX1_ARB 0x88C1
-#define GL_MATRIX2_ARB 0x88C2
-#define GL_MATRIX3_ARB 0x88C3
-#define GL_MATRIX4_ARB 0x88C4
-#define GL_MATRIX5_ARB 0x88C5
-#define GL_MATRIX6_ARB 0x88C6
-#define GL_MATRIX7_ARB 0x88C7
-#define GL_MATRIX8_ARB 0x88C8
-#define GL_MATRIX9_ARB 0x88C9
-#define GL_MATRIX10_ARB 0x88CA
-#define GL_MATRIX11_ARB 0x88CB
-#define GL_MATRIX12_ARB 0x88CC
-#define GL_MATRIX13_ARB 0x88CD
-#define GL_MATRIX14_ARB 0x88CE
-#define GL_MATRIX15_ARB 0x88CF
-#define GL_MATRIX16_ARB 0x88D0
-#define GL_MATRIX17_ARB 0x88D1
-#define GL_MATRIX18_ARB 0x88D2
-#define GL_MATRIX19_ARB 0x88D3
-#define GL_MATRIX20_ARB 0x88D4
-#define GL_MATRIX21_ARB 0x88D5
-#define GL_MATRIX22_ARB 0x88D6
-#define GL_MATRIX23_ARB 0x88D7
-#define GL_MATRIX24_ARB 0x88D8
-#define GL_MATRIX25_ARB 0x88D9
-#define GL_MATRIX26_ARB 0x88DA
-#define GL_MATRIX27_ARB 0x88DB
-#define GL_MATRIX28_ARB 0x88DC
-#define GL_MATRIX29_ARB 0x88DD
-#define GL_MATRIX30_ARB 0x88DE
-#define GL_MATRIX31_ARB 0x88DF
-#endif
-
-#ifndef GL_ARB_fragment_program
-#define GL_FRAGMENT_PROGRAM_ARB 0x8804
-#define GL_PROGRAM_ALU_INSTRUCTIONS_ARB 0x8805
-#define GL_PROGRAM_TEX_INSTRUCTIONS_ARB 0x8806
-#define GL_PROGRAM_TEX_INDIRECTIONS_ARB 0x8807
-#define GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB 0x8808
-#define GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB 0x8809
-#define GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB 0x880A
-#define GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB 0x880B
-#define GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB 0x880C
-#define GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB 0x880D
-#define GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB 0x880E
-#define GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB 0x880F
-#define GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB 0x8810
-#define GL_MAX_TEXTURE_COORDS_ARB 0x8871
-#define GL_MAX_TEXTURE_IMAGE_UNITS_ARB 0x8872
-#endif
-
-#ifndef GL_ARB_vertex_buffer_object
-#define GL_BUFFER_SIZE_ARB 0x8764
-#define GL_BUFFER_USAGE_ARB 0x8765
-#define GL_ARRAY_BUFFER_ARB 0x8892
-#define GL_ELEMENT_ARRAY_BUFFER_ARB 0x8893
-#define GL_ARRAY_BUFFER_BINDING_ARB 0x8894
-#define GL_ELEMENT_ARRAY_BUFFER_BINDING_ARB 0x8895
-#define GL_VERTEX_ARRAY_BUFFER_BINDING_ARB 0x8896
-#define GL_NORMAL_ARRAY_BUFFER_BINDING_ARB 0x8897
-#define GL_COLOR_ARRAY_BUFFER_BINDING_ARB 0x8898
-#define GL_INDEX_ARRAY_BUFFER_BINDING_ARB 0x8899
-#define GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING_ARB 0x889A
-#define GL_EDGE_FLAG_ARRAY_BUFFER_BINDING_ARB 0x889B
-#define GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING_ARB 0x889C
-#define GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING_ARB 0x889D
-#define GL_WEIGHT_ARRAY_BUFFER_BINDING_ARB 0x889E
-#define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ARB 0x889F
-#define GL_READ_ONLY_ARB 0x88B8
-#define GL_WRITE_ONLY_ARB 0x88B9
-#define GL_READ_WRITE_ARB 0x88BA
-#define GL_BUFFER_ACCESS_ARB 0x88BB
-#define GL_BUFFER_MAPPED_ARB 0x88BC
-#define GL_BUFFER_MAP_POINTER_ARB 0x88BD
-#define GL_STREAM_DRAW_ARB 0x88E0
-#define GL_STREAM_READ_ARB 0x88E1
-#define GL_STREAM_COPY_ARB 0x88E2
-#define GL_STATIC_DRAW_ARB 0x88E4
-#define GL_STATIC_READ_ARB 0x88E5
-#define GL_STATIC_COPY_ARB 0x88E6
-#define GL_DYNAMIC_DRAW_ARB 0x88E8
-#define GL_DYNAMIC_READ_ARB 0x88E9
-#define GL_DYNAMIC_COPY_ARB 0x88EA
-#endif
-
-#ifndef GL_ARB_occlusion_query
-#define GL_QUERY_COUNTER_BITS_ARB 0x8864
-#define GL_CURRENT_QUERY_ARB 0x8865
-#define GL_QUERY_RESULT_ARB 0x8866
-#define GL_QUERY_RESULT_AVAILABLE_ARB 0x8867
-#define GL_SAMPLES_PASSED_ARB 0x8914
-#endif
-
-#ifndef GL_ARB_shader_objects
-#define GL_PROGRAM_OBJECT_ARB 0x8B40
-#define GL_SHADER_OBJECT_ARB 0x8B48
-#define GL_OBJECT_TYPE_ARB 0x8B4E
-#define GL_OBJECT_SUBTYPE_ARB 0x8B4F
-#define GL_FLOAT_VEC2_ARB 0x8B50
-#define GL_FLOAT_VEC3_ARB 0x8B51
-#define GL_FLOAT_VEC4_ARB 0x8B52
-#define GL_INT_VEC2_ARB 0x8B53
-#define GL_INT_VEC3_ARB 0x8B54
-#define GL_INT_VEC4_ARB 0x8B55
-#define GL_BOOL_ARB 0x8B56
-#define GL_BOOL_VEC2_ARB 0x8B57
-#define GL_BOOL_VEC3_ARB 0x8B58
-#define GL_BOOL_VEC4_ARB 0x8B59
-#define GL_FLOAT_MAT2_ARB 0x8B5A
-#define GL_FLOAT_MAT3_ARB 0x8B5B
-#define GL_FLOAT_MAT4_ARB 0x8B5C
-#define GL_SAMPLER_1D_ARB 0x8B5D
-#define GL_SAMPLER_2D_ARB 0x8B5E
-#define GL_SAMPLER_3D_ARB 0x8B5F
-#define GL_SAMPLER_CUBE_ARB 0x8B60
-#define GL_SAMPLER_1D_SHADOW_ARB 0x8B61
-#define GL_SAMPLER_2D_SHADOW_ARB 0x8B62
-#define GL_SAMPLER_2D_RECT_ARB 0x8B63
-#define GL_SAMPLER_2D_RECT_SHADOW_ARB 0x8B64
-#define GL_OBJECT_DELETE_STATUS_ARB 0x8B80
-#define GL_OBJECT_COMPILE_STATUS_ARB 0x8B81
-#define GL_OBJECT_LINK_STATUS_ARB 0x8B82
-#define GL_OBJECT_VALIDATE_STATUS_ARB 0x8B83
-#define GL_OBJECT_INFO_LOG_LENGTH_ARB 0x8B84
-#define GL_OBJECT_ATTACHED_OBJECTS_ARB 0x8B85
-#define GL_OBJECT_ACTIVE_UNIFORMS_ARB 0x8B86
-#define GL_OBJECT_ACTIVE_UNIFORM_MAX_LENGTH_ARB 0x8B87
-#define GL_OBJECT_SHADER_SOURCE_LENGTH_ARB 0x8B88
-#endif
-
-#ifndef GL_ARB_vertex_shader
-#define GL_VERTEX_SHADER_ARB 0x8B31
-#define GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB 0x8B4A
-#define GL_MAX_VARYING_FLOATS_ARB 0x8B4B
-#define GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB 0x8B4C
-#define GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB 0x8B4D
-#define GL_OBJECT_ACTIVE_ATTRIBUTES_ARB 0x8B89
-#define GL_OBJECT_ACTIVE_ATTRIBUTE_MAX_LENGTH_ARB 0x8B8A
-#endif
-
-#ifndef GL_ARB_fragment_shader
-#define GL_FRAGMENT_SHADER_ARB 0x8B30
-#define GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB 0x8B49
-#define GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB 0x8B8B
-#endif
-
-#ifndef GL_ARB_shading_language_100
-#define GL_SHADING_LANGUAGE_VERSION_ARB 0x8B8C
-#endif
-
-#ifndef GL_ARB_texture_non_power_of_two
-#endif
-
-#ifndef GL_ARB_point_sprite
-#define GL_POINT_SPRITE_ARB 0x8861
-#define GL_COORD_REPLACE_ARB 0x8862
-#endif
-
-#ifndef GL_ARB_fragment_program_shadow
-#endif
-
-#ifndef GL_ARB_draw_buffers
-#define GL_MAX_DRAW_BUFFERS_ARB 0x8824
-#define GL_DRAW_BUFFER0_ARB 0x8825
-#define GL_DRAW_BUFFER1_ARB 0x8826
-#define GL_DRAW_BUFFER2_ARB 0x8827
-#define GL_DRAW_BUFFER3_ARB 0x8828
-#define GL_DRAW_BUFFER4_ARB 0x8829
-#define GL_DRAW_BUFFER5_ARB 0x882A
-#define GL_DRAW_BUFFER6_ARB 0x882B
-#define GL_DRAW_BUFFER7_ARB 0x882C
-#define GL_DRAW_BUFFER8_ARB 0x882D
-#define GL_DRAW_BUFFER9_ARB 0x882E
-#define GL_DRAW_BUFFER10_ARB 0x882F
-#define GL_DRAW_BUFFER11_ARB 0x8830
-#define GL_DRAW_BUFFER12_ARB 0x8831
-#define GL_DRAW_BUFFER13_ARB 0x8832
-#define GL_DRAW_BUFFER14_ARB 0x8833
-#define GL_DRAW_BUFFER15_ARB 0x8834
-#endif
-
-#ifndef GL_ARB_texture_rectangle
-#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
-#define GL_TEXTURE_BINDING_RECTANGLE_ARB 0x84F6
-#define GL_PROXY_TEXTURE_RECTANGLE_ARB 0x84F7
-#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8
-#endif
-
-#ifndef GL_ARB_color_buffer_float
-#define GL_RGBA_FLOAT_MODE_ARB 0x8820
-#define GL_CLAMP_VERTEX_COLOR_ARB 0x891A
-#define GL_CLAMP_FRAGMENT_COLOR_ARB 0x891B
-#define GL_CLAMP_READ_COLOR_ARB 0x891C
-#define GL_FIXED_ONLY_ARB 0x891D
-#endif
-
-#ifndef GL_ARB_half_float_pixel
-#define GL_HALF_FLOAT_ARB 0x140B
-#endif
-
-#ifndef GL_ARB_texture_float
-#define GL_TEXTURE_RED_TYPE_ARB 0x8C10
-#define GL_TEXTURE_GREEN_TYPE_ARB 0x8C11
-#define GL_TEXTURE_BLUE_TYPE_ARB 0x8C12
-#define GL_TEXTURE_ALPHA_TYPE_ARB 0x8C13
-#define GL_TEXTURE_LUMINANCE_TYPE_ARB 0x8C14
-#define GL_TEXTURE_INTENSITY_TYPE_ARB 0x8C15
-#define GL_TEXTURE_DEPTH_TYPE_ARB 0x8C16
-#define GL_UNSIGNED_NORMALIZED_ARB 0x8C17
-#define GL_RGBA32F_ARB 0x8814
-#define GL_RGB32F_ARB 0x8815
-#define GL_ALPHA32F_ARB 0x8816
-#define GL_INTENSITY32F_ARB 0x8817
-#define GL_LUMINANCE32F_ARB 0x8818
-#define GL_LUMINANCE_ALPHA32F_ARB 0x8819
-#define GL_RGBA16F_ARB 0x881A
-#define GL_RGB16F_ARB 0x881B
-#define GL_ALPHA16F_ARB 0x881C
-#define GL_INTENSITY16F_ARB 0x881D
-#define GL_LUMINANCE16F_ARB 0x881E
-#define GL_LUMINANCE_ALPHA16F_ARB 0x881F
-#endif
-
-#ifndef GL_ARB_pixel_buffer_object
-#define GL_PIXEL_PACK_BUFFER_ARB 0x88EB
-#define GL_PIXEL_UNPACK_BUFFER_ARB 0x88EC
-#define GL_PIXEL_PACK_BUFFER_BINDING_ARB 0x88ED
-#define GL_PIXEL_UNPACK_BUFFER_BINDING_ARB 0x88EF
-#endif
-
-#ifndef GL_ARB_depth_buffer_float
-#define GL_DEPTH_COMPONENT32F 0x8CAC
-#define GL_DEPTH32F_STENCIL8 0x8CAD
-#define GL_FLOAT_32_UNSIGNED_INT_24_8_REV 0x8DAD
-#endif
-
-#ifndef GL_ARB_draw_instanced
-#endif
-
-#ifndef GL_ARB_framebuffer_object
-#define GL_INVALID_FRAMEBUFFER_OPERATION 0x0506
-#define GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING 0x8210
-#define GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE 0x8211
-#define GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE 0x8212
-#define GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE 0x8213
-#define GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE 0x8214
-#define GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE 0x8215
-#define GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE 0x8216
-#define GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE 0x8217
-#define GL_FRAMEBUFFER_DEFAULT 0x8218
-#define GL_FRAMEBUFFER_UNDEFINED 0x8219
-#define GL_DEPTH_STENCIL_ATTACHMENT 0x821A
-#define GL_MAX_RENDERBUFFER_SIZE 0x84E8
-#define GL_DEPTH_STENCIL 0x84F9
-#define GL_UNSIGNED_INT_24_8 0x84FA
-#define GL_DEPTH24_STENCIL8 0x88F0
-#define GL_TEXTURE_STENCIL_SIZE 0x88F1
-#define GL_TEXTURE_RED_TYPE 0x8C10
-#define GL_TEXTURE_GREEN_TYPE 0x8C11
-#define GL_TEXTURE_BLUE_TYPE 0x8C12
-#define GL_TEXTURE_ALPHA_TYPE 0x8C13
-#define GL_TEXTURE_DEPTH_TYPE 0x8C16
-#define GL_UNSIGNED_NORMALIZED 0x8C17
-#define GL_FRAMEBUFFER_BINDING 0x8CA6
-#define GL_DRAW_FRAMEBUFFER_BINDING GL_FRAMEBUFFER_BINDING
-#define GL_RENDERBUFFER_BINDING 0x8CA7
-#define GL_READ_FRAMEBUFFER 0x8CA8
-#define GL_DRAW_FRAMEBUFFER 0x8CA9
-#define GL_READ_FRAMEBUFFER_BINDING 0x8CAA
-#define GL_RENDERBUFFER_SAMPLES 0x8CAB
-#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE 0x8CD0
-#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME 0x8CD1
-#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL 0x8CD2
-#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE 0x8CD3
-#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER 0x8CD4
-#define GL_FRAMEBUFFER_COMPLETE 0x8CD5
-#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT 0x8CD6
-#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT 0x8CD7
-#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER 0x8CDB
-#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER 0x8CDC
-#define GL_FRAMEBUFFER_UNSUPPORTED 0x8CDD
-#define GL_MAX_COLOR_ATTACHMENTS 0x8CDF
-#define GL_COLOR_ATTACHMENT0 0x8CE0
-#define GL_COLOR_ATTACHMENT1 0x8CE1
-#define GL_COLOR_ATTACHMENT2 0x8CE2
-#define GL_COLOR_ATTACHMENT3 0x8CE3
-#define GL_COLOR_ATTACHMENT4 0x8CE4
-#define GL_COLOR_ATTACHMENT5 0x8CE5
-#define GL_COLOR_ATTACHMENT6 0x8CE6
-#define GL_COLOR_ATTACHMENT7 0x8CE7
-#define GL_COLOR_ATTACHMENT8 0x8CE8
-#define GL_COLOR_ATTACHMENT9 0x8CE9
-#define GL_COLOR_ATTACHMENT10 0x8CEA
-#define GL_COLOR_ATTACHMENT11 0x8CEB
-#define GL_COLOR_ATTACHMENT12 0x8CEC
-#define GL_COLOR_ATTACHMENT13 0x8CED
-#define GL_COLOR_ATTACHMENT14 0x8CEE
-#define GL_COLOR_ATTACHMENT15 0x8CEF
-#define GL_DEPTH_ATTACHMENT 0x8D00
-#define GL_STENCIL_ATTACHMENT 0x8D20
-#define GL_FRAMEBUFFER 0x8D40
-#define GL_RENDERBUFFER 0x8D41
-#define GL_RENDERBUFFER_WIDTH 0x8D42
-#define GL_RENDERBUFFER_HEIGHT 0x8D43
-#define GL_RENDERBUFFER_INTERNAL_FORMAT 0x8D44
-#define GL_STENCIL_INDEX1 0x8D46
-#define GL_STENCIL_INDEX4 0x8D47
-#define GL_STENCIL_INDEX8 0x8D48
-#define GL_STENCIL_INDEX16 0x8D49
-#define GL_RENDERBUFFER_RED_SIZE 0x8D50
-#define GL_RENDERBUFFER_GREEN_SIZE 0x8D51
-#define GL_RENDERBUFFER_BLUE_SIZE 0x8D52
-#define GL_RENDERBUFFER_ALPHA_SIZE 0x8D53
-#define GL_RENDERBUFFER_DEPTH_SIZE 0x8D54
-#define GL_RENDERBUFFER_STENCIL_SIZE 0x8D55
-#define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE 0x8D56
-#define GL_MAX_SAMPLES 0x8D57
-#endif
-
-#ifndef GL_ARB_framebuffer_object_DEPRECATED
-#define GL_INDEX 0x8222
-#define GL_TEXTURE_LUMINANCE_TYPE 0x8C14
-#define GL_TEXTURE_INTENSITY_TYPE 0x8C15
-#endif
-
-#ifndef GL_ARB_framebuffer_sRGB
-#define GL_FRAMEBUFFER_SRGB 0x8DB9
-#endif
-
-#ifndef GL_ARB_geometry_shader4
-#define GL_LINES_ADJACENCY_ARB 0x000A
-#define GL_LINE_STRIP_ADJACENCY_ARB 0x000B
-#define GL_TRIANGLES_ADJACENCY_ARB 0x000C
-#define GL_TRIANGLE_STRIP_ADJACENCY_ARB 0x000D
-#define GL_PROGRAM_POINT_SIZE_ARB 0x8642
-#define GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_ARB 0x8C29
-#define GL_FRAMEBUFFER_ATTACHMENT_LAYERED_ARB 0x8DA7
-#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_ARB 0x8DA8
-#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_ARB 0x8DA9
-#define GL_GEOMETRY_SHADER_ARB 0x8DD9
-#define GL_GEOMETRY_VERTICES_OUT_ARB 0x8DDA
-#define GL_GEOMETRY_INPUT_TYPE_ARB 0x8DDB
-#define GL_GEOMETRY_OUTPUT_TYPE_ARB 0x8DDC
-#define GL_MAX_GEOMETRY_VARYING_COMPONENTS_ARB 0x8DDD
-#define GL_MAX_VERTEX_VARYING_COMPONENTS_ARB 0x8DDE
-#define GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_ARB 0x8DDF
-#define GL_MAX_GEOMETRY_OUTPUT_VERTICES_ARB 0x8DE0
-#define GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_ARB 0x8DE1
-/* reuse GL_MAX_VARYING_COMPONENTS */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER */
-#endif
-
-#ifndef GL_ARB_half_float_vertex
-#define GL_HALF_FLOAT 0x140B
-#endif
-
-#ifndef GL_ARB_instanced_arrays
-#define GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0x88FE
-#endif
-
-#ifndef GL_ARB_map_buffer_range
-#define GL_MAP_READ_BIT 0x0001
-#define GL_MAP_WRITE_BIT 0x0002
-#define GL_MAP_INVALIDATE_RANGE_BIT 0x0004
-#define GL_MAP_INVALIDATE_BUFFER_BIT 0x0008
-#define GL_MAP_FLUSH_EXPLICIT_BIT 0x0010
-#define GL_MAP_UNSYNCHRONIZED_BIT 0x0020
-#endif
-
-#ifndef GL_ARB_texture_buffer_object
-#define GL_TEXTURE_BUFFER_ARB 0x8C2A
-#define GL_MAX_TEXTURE_BUFFER_SIZE_ARB 0x8C2B
-#define GL_TEXTURE_BINDING_BUFFER_ARB 0x8C2C
-#define GL_TEXTURE_BUFFER_DATA_STORE_BINDING_ARB 0x8C2D
-#define GL_TEXTURE_BUFFER_FORMAT_ARB 0x8C2E
-#endif
-
-#ifndef GL_ARB_texture_compression_rgtc
-#define GL_COMPRESSED_RED_RGTC1 0x8DBB
-#define GL_COMPRESSED_SIGNED_RED_RGTC1 0x8DBC
-#define GL_COMPRESSED_RG_RGTC2 0x8DBD
-#define GL_COMPRESSED_SIGNED_RG_RGTC2 0x8DBE
-#endif
-
-#ifndef GL_ARB_texture_rg
-#define GL_RG 0x8227
-#define GL_RG_INTEGER 0x8228
-#define GL_R8 0x8229
-#define GL_R16 0x822A
-#define GL_RG8 0x822B
-#define GL_RG16 0x822C
-#define GL_R16F 0x822D
-#define GL_R32F 0x822E
-#define GL_RG16F 0x822F
-#define GL_RG32F 0x8230
-#define GL_R8I 0x8231
-#define GL_R8UI 0x8232
-#define GL_R16I 0x8233
-#define GL_R16UI 0x8234
-#define GL_R32I 0x8235
-#define GL_R32UI 0x8236
-#define GL_RG8I 0x8237
-#define GL_RG8UI 0x8238
-#define GL_RG16I 0x8239
-#define GL_RG16UI 0x823A
-#define GL_RG32I 0x823B
-#define GL_RG32UI 0x823C
-#endif
-
-#ifndef GL_ARB_vertex_array_object
-#define GL_VERTEX_ARRAY_BINDING 0x85B5
-#endif
-
-#ifndef GL_ARB_uniform_buffer_object
-#define GL_UNIFORM_BUFFER 0x8A11
-#define GL_UNIFORM_BUFFER_BINDING 0x8A28
-#define GL_UNIFORM_BUFFER_START 0x8A29
-#define GL_UNIFORM_BUFFER_SIZE 0x8A2A
-#define GL_MAX_VERTEX_UNIFORM_BLOCKS 0x8A2B
-#define GL_MAX_GEOMETRY_UNIFORM_BLOCKS 0x8A2C
-#define GL_MAX_FRAGMENT_UNIFORM_BLOCKS 0x8A2D
-#define GL_MAX_COMBINED_UNIFORM_BLOCKS 0x8A2E
-#define GL_MAX_UNIFORM_BUFFER_BINDINGS 0x8A2F
-#define GL_MAX_UNIFORM_BLOCK_SIZE 0x8A30
-#define GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS 0x8A31
-#define GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS 0x8A32
-#define GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS 0x8A33
-#define GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT 0x8A34
-#define GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH 0x8A35
-#define GL_ACTIVE_UNIFORM_BLOCKS 0x8A36
-#define GL_UNIFORM_TYPE 0x8A37
-#define GL_UNIFORM_SIZE 0x8A38
-#define GL_UNIFORM_NAME_LENGTH 0x8A39
-#define GL_UNIFORM_BLOCK_INDEX 0x8A3A
-#define GL_UNIFORM_OFFSET 0x8A3B
-#define GL_UNIFORM_ARRAY_STRIDE 0x8A3C
-#define GL_UNIFORM_MATRIX_STRIDE 0x8A3D
-#define GL_UNIFORM_IS_ROW_MAJOR 0x8A3E
-#define GL_UNIFORM_BLOCK_BINDING 0x8A3F
-#define GL_UNIFORM_BLOCK_DATA_SIZE 0x8A40
-#define GL_UNIFORM_BLOCK_NAME_LENGTH 0x8A41
-#define GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS 0x8A42
-#define GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES 0x8A43
-#define GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER 0x8A44
-#define GL_UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER 0x8A45
-#define GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER 0x8A46
-#define GL_INVALID_INDEX 0xFFFFFFFFu
-#endif
-
-#ifndef GL_ARB_compatibility
-/* ARB_compatibility just defines tokens from core 3.0 */
-#endif
-
-#ifndef GL_ARB_copy_buffer
-#define GL_COPY_READ_BUFFER 0x8F36
-#define GL_COPY_WRITE_BUFFER 0x8F37
-#endif
-
-#ifndef GL_ARB_shader_texture_lod
-#endif
-
-#ifndef GL_ARB_depth_clamp
-#define GL_DEPTH_CLAMP 0x864F
-#endif
-
-#ifndef GL_ARB_draw_elements_base_vertex
-#endif
-
-#ifndef GL_ARB_fragment_coord_conventions
-#endif
-
-#ifndef GL_ARB_provoking_vertex
-#define GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION 0x8E4C
-#define GL_FIRST_VERTEX_CONVENTION 0x8E4D
-#define GL_LAST_VERTEX_CONVENTION 0x8E4E
-#define GL_PROVOKING_VERTEX 0x8E4F
-#endif
-
-#ifndef GL_ARB_seamless_cube_map
-#define GL_TEXTURE_CUBE_MAP_SEAMLESS 0x884F
-#endif
-
-#ifndef GL_ARB_sync
-#define GL_MAX_SERVER_WAIT_TIMEOUT 0x9111
-#define GL_OBJECT_TYPE 0x9112
-#define GL_SYNC_CONDITION 0x9113
-#define GL_SYNC_STATUS 0x9114
-#define GL_SYNC_FLAGS 0x9115
-#define GL_SYNC_FENCE 0x9116
-#define GL_SYNC_GPU_COMMANDS_COMPLETE 0x9117
-#define GL_UNSIGNALED 0x9118
-#define GL_SIGNALED 0x9119
-#define GL_ALREADY_SIGNALED 0x911A
-#define GL_TIMEOUT_EXPIRED 0x911B
-#define GL_CONDITION_SATISFIED 0x911C
-#define GL_WAIT_FAILED 0x911D
-#define GL_SYNC_FLUSH_COMMANDS_BIT 0x00000001
-#define GL_TIMEOUT_IGNORED 0xFFFFFFFFFFFFFFFFull
-#endif
-
-#ifndef GL_ARB_texture_multisample
-#define GL_SAMPLE_POSITION 0x8E50
-#define GL_SAMPLE_MASK 0x8E51
-#define GL_SAMPLE_MASK_VALUE 0x8E52
-#define GL_MAX_SAMPLE_MASK_WORDS 0x8E59
-#define GL_TEXTURE_2D_MULTISAMPLE 0x9100
-#define GL_PROXY_TEXTURE_2D_MULTISAMPLE 0x9101
-#define GL_TEXTURE_2D_MULTISAMPLE_ARRAY 0x9102
-#define GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY 0x9103
-#define GL_TEXTURE_BINDING_2D_MULTISAMPLE 0x9104
-#define GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY 0x9105
-#define GL_TEXTURE_SAMPLES 0x9106
-#define GL_TEXTURE_FIXED_SAMPLE_LOCATIONS 0x9107
-#define GL_SAMPLER_2D_MULTISAMPLE 0x9108
-#define GL_INT_SAMPLER_2D_MULTISAMPLE 0x9109
-#define GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE 0x910A
-#define GL_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910B
-#define GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910C
-#define GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910D
-#define GL_MAX_COLOR_TEXTURE_SAMPLES 0x910E
-#define GL_MAX_DEPTH_TEXTURE_SAMPLES 0x910F
-#define GL_MAX_INTEGER_SAMPLES 0x9110
-#endif
-
-#ifndef GL_ARB_vertex_array_bgra
-/* reuse GL_BGRA */
-#endif
-
-#ifndef GL_ARB_draw_buffers_blend
-#endif
-
-#ifndef GL_ARB_sample_shading
-#define GL_SAMPLE_SHADING_ARB 0x8C36
-#define GL_MIN_SAMPLE_SHADING_VALUE_ARB 0x8C37
-#endif
-
-#ifndef GL_ARB_texture_cube_map_array
-#define GL_TEXTURE_CUBE_MAP_ARRAY_ARB 0x9009
-#define GL_TEXTURE_BINDING_CUBE_MAP_ARRAY_ARB 0x900A
-#define GL_PROXY_TEXTURE_CUBE_MAP_ARRAY_ARB 0x900B
-#define GL_SAMPLER_CUBE_MAP_ARRAY_ARB 0x900C
-#define GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW_ARB 0x900D
-#define GL_INT_SAMPLER_CUBE_MAP_ARRAY_ARB 0x900E
-#define GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY_ARB 0x900F
-#endif
-
-#ifndef GL_ARB_texture_gather
-#define GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET_ARB 0x8E5E
-#define GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET_ARB 0x8E5F
-#endif
-
-#ifndef GL_ARB_texture_query_lod
-#endif
-
-#ifndef GL_ARB_shading_language_include
-#define GL_SHADER_INCLUDE_ARB 0x8DAE
-#define GL_NAMED_STRING_LENGTH_ARB 0x8DE9
-#define GL_NAMED_STRING_TYPE_ARB 0x8DEA
-#endif
-
-#ifndef GL_ARB_texture_compression_bptc
-#define GL_COMPRESSED_RGBA_BPTC_UNORM_ARB 0x8E8C
-#define GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB 0x8E8D
-#define GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB 0x8E8E
-#define GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB 0x8E8F
-#endif
-
-#ifndef GL_ARB_blend_func_extended
-#define GL_SRC1_COLOR 0x88F9
-/* reuse GL_SRC1_ALPHA */
-#define GL_ONE_MINUS_SRC1_COLOR 0x88FA
-#define GL_ONE_MINUS_SRC1_ALPHA 0x88FB
-#define GL_MAX_DUAL_SOURCE_DRAW_BUFFERS 0x88FC
-#endif
-
-#ifndef GL_ARB_explicit_attrib_location
-#endif
-
-#ifndef GL_ARB_occlusion_query2
-#define GL_ANY_SAMPLES_PASSED 0x8C2F
-#endif
-
-#ifndef GL_ARB_sampler_objects
-#define GL_SAMPLER_BINDING 0x8919
-#endif
-
-#ifndef GL_ARB_shader_bit_encoding
-#endif
-
-#ifndef GL_ARB_texture_rgb10_a2ui
-#define GL_RGB10_A2UI 0x906F
-#endif
-
-#ifndef GL_ARB_texture_swizzle
-#define GL_TEXTURE_SWIZZLE_R 0x8E42
-#define GL_TEXTURE_SWIZZLE_G 0x8E43
-#define GL_TEXTURE_SWIZZLE_B 0x8E44
-#define GL_TEXTURE_SWIZZLE_A 0x8E45
-#define GL_TEXTURE_SWIZZLE_RGBA 0x8E46
-#endif
-
-#ifndef GL_ARB_timer_query
-#define GL_TIME_ELAPSED 0x88BF
-#define GL_TIMESTAMP 0x8E28
-#endif
-
-#ifndef GL_ARB_vertex_type_2_10_10_10_rev
-/* reuse GL_UNSIGNED_INT_2_10_10_10_REV */
-#define GL_INT_2_10_10_10_REV 0x8D9F
-#endif
-
-#ifndef GL_ARB_draw_indirect
-#define GL_DRAW_INDIRECT_BUFFER 0x8F3F
-#define GL_DRAW_INDIRECT_BUFFER_BINDING 0x8F43
-#endif
-
-#ifndef GL_ARB_gpu_shader5
-#define GL_GEOMETRY_SHADER_INVOCATIONS 0x887F
-#define GL_MAX_GEOMETRY_SHADER_INVOCATIONS 0x8E5A
-#define GL_MIN_FRAGMENT_INTERPOLATION_OFFSET 0x8E5B
-#define GL_MAX_FRAGMENT_INTERPOLATION_OFFSET 0x8E5C
-#define GL_FRAGMENT_INTERPOLATION_OFFSET_BITS 0x8E5D
-/* reuse GL_MAX_VERTEX_STREAMS */
-#endif
-
-#ifndef GL_ARB_gpu_shader_fp64
-/* reuse GL_DOUBLE */
-#define GL_DOUBLE_VEC2 0x8FFC
-#define GL_DOUBLE_VEC3 0x8FFD
-#define GL_DOUBLE_VEC4 0x8FFE
-#define GL_DOUBLE_MAT2 0x8F46
-#define GL_DOUBLE_MAT3 0x8F47
-#define GL_DOUBLE_MAT4 0x8F48
-#define GL_DOUBLE_MAT2x3 0x8F49
-#define GL_DOUBLE_MAT2x4 0x8F4A
-#define GL_DOUBLE_MAT3x2 0x8F4B
-#define GL_DOUBLE_MAT3x4 0x8F4C
-#define GL_DOUBLE_MAT4x2 0x8F4D
-#define GL_DOUBLE_MAT4x3 0x8F4E
-#endif
-
-#ifndef GL_ARB_shader_subroutine
-#define GL_ACTIVE_SUBROUTINES 0x8DE5
-#define GL_ACTIVE_SUBROUTINE_UNIFORMS 0x8DE6
-#define GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS 0x8E47
-#define GL_ACTIVE_SUBROUTINE_MAX_LENGTH 0x8E48
-#define GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH 0x8E49
-#define GL_MAX_SUBROUTINES 0x8DE7
-#define GL_MAX_SUBROUTINE_UNIFORM_LOCATIONS 0x8DE8
-#define GL_NUM_COMPATIBLE_SUBROUTINES 0x8E4A
-#define GL_COMPATIBLE_SUBROUTINES 0x8E4B
-/* reuse GL_UNIFORM_SIZE */
-/* reuse GL_UNIFORM_NAME_LENGTH */
-#endif
-
-#ifndef GL_ARB_tessellation_shader
-#define GL_PATCHES 0x000E
-#define GL_PATCH_VERTICES 0x8E72
-#define GL_PATCH_DEFAULT_INNER_LEVEL 0x8E73
-#define GL_PATCH_DEFAULT_OUTER_LEVEL 0x8E74
-#define GL_TESS_CONTROL_OUTPUT_VERTICES 0x8E75
-#define GL_TESS_GEN_MODE 0x8E76
-#define GL_TESS_GEN_SPACING 0x8E77
-#define GL_TESS_GEN_VERTEX_ORDER 0x8E78
-#define GL_TESS_GEN_POINT_MODE 0x8E79
-/* reuse GL_TRIANGLES */
-/* reuse GL_QUADS */
-#define GL_ISOLINES 0x8E7A
-/* reuse GL_EQUAL */
-#define GL_FRACTIONAL_ODD 0x8E7B
-#define GL_FRACTIONAL_EVEN 0x8E7C
-/* reuse GL_CCW */
-/* reuse GL_CW */
-#define GL_MAX_PATCH_VERTICES 0x8E7D
-#define GL_MAX_TESS_GEN_LEVEL 0x8E7E
-#define GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS 0x8E7F
-#define GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS 0x8E80
-#define GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS 0x8E81
-#define GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS 0x8E82
-#define GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS 0x8E83
-#define GL_MAX_TESS_PATCH_COMPONENTS 0x8E84
-#define GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS 0x8E85
-#define GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS 0x8E86
-#define GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS 0x8E89
-#define GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS 0x8E8A
-#define GL_MAX_TESS_CONTROL_INPUT_COMPONENTS 0x886C
-#define GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS 0x886D
-#define GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS 0x8E1E
-#define GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS 0x8E1F
-#define GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER 0x84F0
-#define GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER 0x84F1
-#define GL_TESS_EVALUATION_SHADER 0x8E87
-#define GL_TESS_CONTROL_SHADER 0x8E88
-#endif
-
-#ifndef GL_ARB_texture_buffer_object_rgb32
-/* reuse GL_RGB32F */
-/* reuse GL_RGB32UI */
-/* reuse GL_RGB32I */
-#endif
-
-#ifndef GL_ARB_transform_feedback2
-#define GL_TRANSFORM_FEEDBACK 0x8E22
-#define GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED 0x8E23
-#define GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE 0x8E24
-#define GL_TRANSFORM_FEEDBACK_BINDING 0x8E25
-#endif
-
-#ifndef GL_ARB_transform_feedback3
-#define GL_MAX_TRANSFORM_FEEDBACK_BUFFERS 0x8E70
-#define GL_MAX_VERTEX_STREAMS 0x8E71
-#endif
-
-#ifndef GL_ARB_ES2_compatibility
-#define GL_FIXED 0x140C
-#define GL_IMPLEMENTATION_COLOR_READ_TYPE 0x8B9A
-#define GL_IMPLEMENTATION_COLOR_READ_FORMAT 0x8B9B
-#define GL_LOW_FLOAT 0x8DF0
-#define GL_MEDIUM_FLOAT 0x8DF1
-#define GL_HIGH_FLOAT 0x8DF2
-#define GL_LOW_INT 0x8DF3
-#define GL_MEDIUM_INT 0x8DF4
-#define GL_HIGH_INT 0x8DF5
-#define GL_SHADER_COMPILER 0x8DFA
-#define GL_NUM_SHADER_BINARY_FORMATS 0x8DF9
-#define GL_MAX_VERTEX_UNIFORM_VECTORS 0x8DFB
-#define GL_MAX_VARYING_VECTORS 0x8DFC
-#define GL_MAX_FRAGMENT_UNIFORM_VECTORS 0x8DFD
-#endif
-
-#ifndef GL_ARB_get_program_binary
-#define GL_PROGRAM_BINARY_RETRIEVABLE_HINT 0x8257
-#define GL_PROGRAM_BINARY_LENGTH 0x8741
-#define GL_NUM_PROGRAM_BINARY_FORMATS 0x87FE
-#define GL_PROGRAM_BINARY_FORMATS 0x87FF
-#endif
-
-#ifndef GL_ARB_separate_shader_objects
-#define GL_VERTEX_SHADER_BIT 0x00000001
-#define GL_FRAGMENT_SHADER_BIT 0x00000002
-#define GL_GEOMETRY_SHADER_BIT 0x00000004
-#define GL_TESS_CONTROL_SHADER_BIT 0x00000008
-#define GL_TESS_EVALUATION_SHADER_BIT 0x00000010
-#define GL_ALL_SHADER_BITS 0xFFFFFFFF
-#define GL_PROGRAM_SEPARABLE 0x8258
-#define GL_ACTIVE_PROGRAM 0x8259
-#define GL_PROGRAM_PIPELINE_BINDING 0x825A
-#endif
-
-#ifndef GL_ARB_shader_precision
-#endif
-
-#ifndef GL_ARB_vertex_attrib_64bit
-/* reuse GL_RGB32I */
-/* reuse GL_DOUBLE_VEC2 */
-/* reuse GL_DOUBLE_VEC3 */
-/* reuse GL_DOUBLE_VEC4 */
-/* reuse GL_DOUBLE_MAT2 */
-/* reuse GL_DOUBLE_MAT3 */
-/* reuse GL_DOUBLE_MAT4 */
-/* reuse GL_DOUBLE_MAT2x3 */
-/* reuse GL_DOUBLE_MAT2x4 */
-/* reuse GL_DOUBLE_MAT3x2 */
-/* reuse GL_DOUBLE_MAT3x4 */
-/* reuse GL_DOUBLE_MAT4x2 */
-/* reuse GL_DOUBLE_MAT4x3 */
-#endif
-
-#ifndef GL_ARB_viewport_array
-/* reuse GL_SCISSOR_BOX */
-/* reuse GL_VIEWPORT */
-/* reuse GL_DEPTH_RANGE */
-/* reuse GL_SCISSOR_TEST */
-#define GL_MAX_VIEWPORTS 0x825B
-#define GL_VIEWPORT_SUBPIXEL_BITS 0x825C
-#define GL_VIEWPORT_BOUNDS_RANGE 0x825D
-#define GL_LAYER_PROVOKING_VERTEX 0x825E
-#define GL_VIEWPORT_INDEX_PROVOKING_VERTEX 0x825F
-#define GL_UNDEFINED_VERTEX 0x8260
-/* reuse GL_FIRST_VERTEX_CONVENTION */
-/* reuse GL_LAST_VERTEX_CONVENTION */
-/* reuse GL_PROVOKING_VERTEX */
-#endif
-
-#ifndef GL_ARB_cl_event
-#define GL_SYNC_CL_EVENT_ARB 0x8240
-#define GL_SYNC_CL_EVENT_COMPLETE_ARB 0x8241
-#endif
-
-#ifndef GL_ARB_debug_output
-#define GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB 0x8242
-#define GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH_ARB 0x8243
-#define GL_DEBUG_CALLBACK_FUNCTION_ARB 0x8244
-#define GL_DEBUG_CALLBACK_USER_PARAM_ARB 0x8245
-#define GL_DEBUG_SOURCE_API_ARB 0x8246
-#define GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB 0x8247
-#define GL_DEBUG_SOURCE_SHADER_COMPILER_ARB 0x8248
-#define GL_DEBUG_SOURCE_THIRD_PARTY_ARB 0x8249
-#define GL_DEBUG_SOURCE_APPLICATION_ARB 0x824A
-#define GL_DEBUG_SOURCE_OTHER_ARB 0x824B
-#define GL_DEBUG_TYPE_ERROR_ARB 0x824C
-#define GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB 0x824D
-#define GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB 0x824E
-#define GL_DEBUG_TYPE_PORTABILITY_ARB 0x824F
-#define GL_DEBUG_TYPE_PERFORMANCE_ARB 0x8250
-#define GL_DEBUG_TYPE_OTHER_ARB 0x8251
-#define GL_MAX_DEBUG_MESSAGE_LENGTH_ARB 0x9143
-#define GL_MAX_DEBUG_LOGGED_MESSAGES_ARB 0x9144
-#define GL_DEBUG_LOGGED_MESSAGES_ARB 0x9145
-#define GL_DEBUG_SEVERITY_HIGH_ARB 0x9146
-#define GL_DEBUG_SEVERITY_MEDIUM_ARB 0x9147
-#define GL_DEBUG_SEVERITY_LOW_ARB 0x9148
-#endif
-
-#ifndef GL_ARB_robustness
-/* reuse GL_NO_ERROR */
-#define GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB 0x00000004
-#define GL_LOSE_CONTEXT_ON_RESET_ARB 0x8252
-#define GL_GUILTY_CONTEXT_RESET_ARB 0x8253
-#define GL_INNOCENT_CONTEXT_RESET_ARB 0x8254
-#define GL_UNKNOWN_CONTEXT_RESET_ARB 0x8255
-#define GL_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
-#define GL_NO_RESET_NOTIFICATION_ARB 0x8261
-#endif
-
-#ifndef GL_ARB_shader_stencil_export
-#endif
-
-#ifndef GL_EXT_abgr
-#define GL_ABGR_EXT 0x8000
-#endif
-
-#ifndef GL_EXT_blend_color
-#define GL_CONSTANT_COLOR_EXT 0x8001
-#define GL_ONE_MINUS_CONSTANT_COLOR_EXT 0x8002
-#define GL_CONSTANT_ALPHA_EXT 0x8003
-#define GL_ONE_MINUS_CONSTANT_ALPHA_EXT 0x8004
-#define GL_BLEND_COLOR_EXT 0x8005
-#endif
-
-#ifndef GL_EXT_polygon_offset
-#define GL_POLYGON_OFFSET_EXT 0x8037
-#define GL_POLYGON_OFFSET_FACTOR_EXT 0x8038
-#define GL_POLYGON_OFFSET_BIAS_EXT 0x8039
-#endif
-
-#ifndef GL_EXT_texture
-#define GL_ALPHA4_EXT 0x803B
-#define GL_ALPHA8_EXT 0x803C
-#define GL_ALPHA12_EXT 0x803D
-#define GL_ALPHA16_EXT 0x803E
-#define GL_LUMINANCE4_EXT 0x803F
-#define GL_LUMINANCE8_EXT 0x8040
-#define GL_LUMINANCE12_EXT 0x8041
-#define GL_LUMINANCE16_EXT 0x8042
-#define GL_LUMINANCE4_ALPHA4_EXT 0x8043
-#define GL_LUMINANCE6_ALPHA2_EXT 0x8044
-#define GL_LUMINANCE8_ALPHA8_EXT 0x8045
-#define GL_LUMINANCE12_ALPHA4_EXT 0x8046
-#define GL_LUMINANCE12_ALPHA12_EXT 0x8047
-#define GL_LUMINANCE16_ALPHA16_EXT 0x8048
-#define GL_INTENSITY_EXT 0x8049
-#define GL_INTENSITY4_EXT 0x804A
-#define GL_INTENSITY8_EXT 0x804B
-#define GL_INTENSITY12_EXT 0x804C
-#define GL_INTENSITY16_EXT 0x804D
-#define GL_RGB2_EXT 0x804E
-#define GL_RGB4_EXT 0x804F
-#define GL_RGB5_EXT 0x8050
-#define GL_RGB8_EXT 0x8051
-#define GL_RGB10_EXT 0x8052
-#define GL_RGB12_EXT 0x8053
-#define GL_RGB16_EXT 0x8054
-#define GL_RGBA2_EXT 0x8055
-#define GL_RGBA4_EXT 0x8056
-#define GL_RGB5_A1_EXT 0x8057
-#define GL_RGBA8_EXT 0x8058
-#define GL_RGB10_A2_EXT 0x8059
-#define GL_RGBA12_EXT 0x805A
-#define GL_RGBA16_EXT 0x805B
-#define GL_TEXTURE_RED_SIZE_EXT 0x805C
-#define GL_TEXTURE_GREEN_SIZE_EXT 0x805D
-#define GL_TEXTURE_BLUE_SIZE_EXT 0x805E
-#define GL_TEXTURE_ALPHA_SIZE_EXT 0x805F
-#define GL_TEXTURE_LUMINANCE_SIZE_EXT 0x8060
-#define GL_TEXTURE_INTENSITY_SIZE_EXT 0x8061
-#define GL_REPLACE_EXT 0x8062
-#define GL_PROXY_TEXTURE_1D_EXT 0x8063
-#define GL_PROXY_TEXTURE_2D_EXT 0x8064
-#define GL_TEXTURE_TOO_LARGE_EXT 0x8065
-#endif
-
-#ifndef GL_EXT_texture3D
-#define GL_PACK_SKIP_IMAGES_EXT 0x806B
-#define GL_PACK_IMAGE_HEIGHT_EXT 0x806C
-#define GL_UNPACK_SKIP_IMAGES_EXT 0x806D
-#define GL_UNPACK_IMAGE_HEIGHT_EXT 0x806E
-#define GL_TEXTURE_3D_EXT 0x806F
-#define GL_PROXY_TEXTURE_3D_EXT 0x8070
-#define GL_TEXTURE_DEPTH_EXT 0x8071
-#define GL_TEXTURE_WRAP_R_EXT 0x8072
-#define GL_MAX_3D_TEXTURE_SIZE_EXT 0x8073
-#endif
-
-#ifndef GL_SGIS_texture_filter4
-#define GL_FILTER4_SGIS 0x8146
-#define GL_TEXTURE_FILTER4_SIZE_SGIS 0x8147
-#endif
-
-#ifndef GL_EXT_subtexture
-#endif
-
-#ifndef GL_EXT_copy_texture
-#endif
-
-#ifndef GL_EXT_histogram
-#define GL_HISTOGRAM_EXT 0x8024
-#define GL_PROXY_HISTOGRAM_EXT 0x8025
-#define GL_HISTOGRAM_WIDTH_EXT 0x8026
-#define GL_HISTOGRAM_FORMAT_EXT 0x8027
-#define GL_HISTOGRAM_RED_SIZE_EXT 0x8028
-#define GL_HISTOGRAM_GREEN_SIZE_EXT 0x8029
-#define GL_HISTOGRAM_BLUE_SIZE_EXT 0x802A
-#define GL_HISTOGRAM_ALPHA_SIZE_EXT 0x802B
-#define GL_HISTOGRAM_LUMINANCE_SIZE_EXT 0x802C
-#define GL_HISTOGRAM_SINK_EXT 0x802D
-#define GL_MINMAX_EXT 0x802E
-#define GL_MINMAX_FORMAT_EXT 0x802F
-#define GL_MINMAX_SINK_EXT 0x8030
-#define GL_TABLE_TOO_LARGE_EXT 0x8031
-#endif
-
-#ifndef GL_EXT_convolution
-#define GL_CONVOLUTION_1D_EXT 0x8010
-#define GL_CONVOLUTION_2D_EXT 0x8011
-#define GL_SEPARABLE_2D_EXT 0x8012
-#define GL_CONVOLUTION_BORDER_MODE_EXT 0x8013
-#define GL_CONVOLUTION_FILTER_SCALE_EXT 0x8014
-#define GL_CONVOLUTION_FILTER_BIAS_EXT 0x8015
-#define GL_REDUCE_EXT 0x8016
-#define GL_CONVOLUTION_FORMAT_EXT 0x8017
-#define GL_CONVOLUTION_WIDTH_EXT 0x8018
-#define GL_CONVOLUTION_HEIGHT_EXT 0x8019
-#define GL_MAX_CONVOLUTION_WIDTH_EXT 0x801A
-#define GL_MAX_CONVOLUTION_HEIGHT_EXT 0x801B
-#define GL_POST_CONVOLUTION_RED_SCALE_EXT 0x801C
-#define GL_POST_CONVOLUTION_GREEN_SCALE_EXT 0x801D
-#define GL_POST_CONVOLUTION_BLUE_SCALE_EXT 0x801E
-#define GL_POST_CONVOLUTION_ALPHA_SCALE_EXT 0x801F
-#define GL_POST_CONVOLUTION_RED_BIAS_EXT 0x8020
-#define GL_POST_CONVOLUTION_GREEN_BIAS_EXT 0x8021
-#define GL_POST_CONVOLUTION_BLUE_BIAS_EXT 0x8022
-#define GL_POST_CONVOLUTION_ALPHA_BIAS_EXT 0x8023
-#endif
-
-#ifndef GL_SGI_color_matrix
-#define GL_COLOR_MATRIX_SGI 0x80B1
-#define GL_COLOR_MATRIX_STACK_DEPTH_SGI 0x80B2
-#define GL_MAX_COLOR_MATRIX_STACK_DEPTH_SGI 0x80B3
-#define GL_POST_COLOR_MATRIX_RED_SCALE_SGI 0x80B4
-#define GL_POST_COLOR_MATRIX_GREEN_SCALE_SGI 0x80B5
-#define GL_POST_COLOR_MATRIX_BLUE_SCALE_SGI 0x80B6
-#define GL_POST_COLOR_MATRIX_ALPHA_SCALE_SGI 0x80B7
-#define GL_POST_COLOR_MATRIX_RED_BIAS_SGI 0x80B8
-#define GL_POST_COLOR_MATRIX_GREEN_BIAS_SGI 0x80B9
-#define GL_POST_COLOR_MATRIX_BLUE_BIAS_SGI 0x80BA
-#define GL_POST_COLOR_MATRIX_ALPHA_BIAS_SGI 0x80BB
-#endif
-
-#ifndef GL_SGI_color_table
-#define GL_COLOR_TABLE_SGI 0x80D0
-#define GL_POST_CONVOLUTION_COLOR_TABLE_SGI 0x80D1
-#define GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI 0x80D2
-#define GL_PROXY_COLOR_TABLE_SGI 0x80D3
-#define GL_PROXY_POST_CONVOLUTION_COLOR_TABLE_SGI 0x80D4
-#define GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE_SGI 0x80D5
-#define GL_COLOR_TABLE_SCALE_SGI 0x80D6
-#define GL_COLOR_TABLE_BIAS_SGI 0x80D7
-#define GL_COLOR_TABLE_FORMAT_SGI 0x80D8
-#define GL_COLOR_TABLE_WIDTH_SGI 0x80D9
-#define GL_COLOR_TABLE_RED_SIZE_SGI 0x80DA
-#define GL_COLOR_TABLE_GREEN_SIZE_SGI 0x80DB
-#define GL_COLOR_TABLE_BLUE_SIZE_SGI 0x80DC
-#define GL_COLOR_TABLE_ALPHA_SIZE_SGI 0x80DD
-#define GL_COLOR_TABLE_LUMINANCE_SIZE_SGI 0x80DE
-#define GL_COLOR_TABLE_INTENSITY_SIZE_SGI 0x80DF
-#endif
-
-#ifndef GL_SGIS_pixel_texture
-#define GL_PIXEL_TEXTURE_SGIS 0x8353
-#define GL_PIXEL_FRAGMENT_RGB_SOURCE_SGIS 0x8354
-#define GL_PIXEL_FRAGMENT_ALPHA_SOURCE_SGIS 0x8355
-#define GL_PIXEL_GROUP_COLOR_SGIS 0x8356
-#endif
-
-#ifndef GL_SGIX_pixel_texture
-#define GL_PIXEL_TEX_GEN_SGIX 0x8139
-#define GL_PIXEL_TEX_GEN_MODE_SGIX 0x832B
-#endif
-
-#ifndef GL_SGIS_texture4D
-#define GL_PACK_SKIP_VOLUMES_SGIS 0x8130
-#define GL_PACK_IMAGE_DEPTH_SGIS 0x8131
-#define GL_UNPACK_SKIP_VOLUMES_SGIS 0x8132
-#define GL_UNPACK_IMAGE_DEPTH_SGIS 0x8133
-#define GL_TEXTURE_4D_SGIS 0x8134
-#define GL_PROXY_TEXTURE_4D_SGIS 0x8135
-#define GL_TEXTURE_4DSIZE_SGIS 0x8136
-#define GL_TEXTURE_WRAP_Q_SGIS 0x8137
-#define GL_MAX_4D_TEXTURE_SIZE_SGIS 0x8138
-#define GL_TEXTURE_4D_BINDING_SGIS 0x814F
-#endif
-
-#ifndef GL_SGI_texture_color_table
-#define GL_TEXTURE_COLOR_TABLE_SGI 0x80BC
-#define GL_PROXY_TEXTURE_COLOR_TABLE_SGI 0x80BD
-#endif
-
-#ifndef GL_EXT_cmyka
-#define GL_CMYK_EXT 0x800C
-#define GL_CMYKA_EXT 0x800D
-#define GL_PACK_CMYK_HINT_EXT 0x800E
-#define GL_UNPACK_CMYK_HINT_EXT 0x800F
-#endif
-
-#ifndef GL_EXT_texture_object
-#define GL_TEXTURE_PRIORITY_EXT 0x8066
-#define GL_TEXTURE_RESIDENT_EXT 0x8067
-#define GL_TEXTURE_1D_BINDING_EXT 0x8068
-#define GL_TEXTURE_2D_BINDING_EXT 0x8069
-#define GL_TEXTURE_3D_BINDING_EXT 0x806A
-#endif
-
-#ifndef GL_SGIS_detail_texture
-#define GL_DETAIL_TEXTURE_2D_SGIS 0x8095
-#define GL_DETAIL_TEXTURE_2D_BINDING_SGIS 0x8096
-#define GL_LINEAR_DETAIL_SGIS 0x8097
-#define GL_LINEAR_DETAIL_ALPHA_SGIS 0x8098
-#define GL_LINEAR_DETAIL_COLOR_SGIS 0x8099
-#define GL_DETAIL_TEXTURE_LEVEL_SGIS 0x809A
-#define GL_DETAIL_TEXTURE_MODE_SGIS 0x809B
-#define GL_DETAIL_TEXTURE_FUNC_POINTS_SGIS 0x809C
-#endif
-
-#ifndef GL_SGIS_sharpen_texture
-#define GL_LINEAR_SHARPEN_SGIS 0x80AD
-#define GL_LINEAR_SHARPEN_ALPHA_SGIS 0x80AE
-#define GL_LINEAR_SHARPEN_COLOR_SGIS 0x80AF
-#define GL_SHARPEN_TEXTURE_FUNC_POINTS_SGIS 0x80B0
-#endif
-
-#ifndef GL_EXT_packed_pixels
-#define GL_UNSIGNED_BYTE_3_3_2_EXT 0x8032
-#define GL_UNSIGNED_SHORT_4_4_4_4_EXT 0x8033
-#define GL_UNSIGNED_SHORT_5_5_5_1_EXT 0x8034
-#define GL_UNSIGNED_INT_8_8_8_8_EXT 0x8035
-#define GL_UNSIGNED_INT_10_10_10_2_EXT 0x8036
-#endif
-
-#ifndef GL_SGIS_texture_lod
-#define GL_TEXTURE_MIN_LOD_SGIS 0x813A
-#define GL_TEXTURE_MAX_LOD_SGIS 0x813B
-#define GL_TEXTURE_BASE_LEVEL_SGIS 0x813C
-#define GL_TEXTURE_MAX_LEVEL_SGIS 0x813D
-#endif
-
-#ifndef GL_SGIS_multisample
-#define GL_MULTISAMPLE_SGIS 0x809D
-#define GL_SAMPLE_ALPHA_TO_MASK_SGIS 0x809E
-#define GL_SAMPLE_ALPHA_TO_ONE_SGIS 0x809F
-#define GL_SAMPLE_MASK_SGIS 0x80A0
-#define GL_1PASS_SGIS 0x80A1
-#define GL_2PASS_0_SGIS 0x80A2
-#define GL_2PASS_1_SGIS 0x80A3
-#define GL_4PASS_0_SGIS 0x80A4
-#define GL_4PASS_1_SGIS 0x80A5
-#define GL_4PASS_2_SGIS 0x80A6
-#define GL_4PASS_3_SGIS 0x80A7
-#define GL_SAMPLE_BUFFERS_SGIS 0x80A8
-#define GL_SAMPLES_SGIS 0x80A9
-#define GL_SAMPLE_MASK_VALUE_SGIS 0x80AA
-#define GL_SAMPLE_MASK_INVERT_SGIS 0x80AB
-#define GL_SAMPLE_PATTERN_SGIS 0x80AC
-#endif
-
-#ifndef GL_EXT_rescale_normal
-#define GL_RESCALE_NORMAL_EXT 0x803A
-#endif
-
-#ifndef GL_EXT_vertex_array
-#define GL_VERTEX_ARRAY_EXT 0x8074
-#define GL_NORMAL_ARRAY_EXT 0x8075
-#define GL_COLOR_ARRAY_EXT 0x8076
-#define GL_INDEX_ARRAY_EXT 0x8077
-#define GL_TEXTURE_COORD_ARRAY_EXT 0x8078
-#define GL_EDGE_FLAG_ARRAY_EXT 0x8079
-#define GL_VERTEX_ARRAY_SIZE_EXT 0x807A
-#define GL_VERTEX_ARRAY_TYPE_EXT 0x807B
-#define GL_VERTEX_ARRAY_STRIDE_EXT 0x807C
-#define GL_VERTEX_ARRAY_COUNT_EXT 0x807D
-#define GL_NORMAL_ARRAY_TYPE_EXT 0x807E
-#define GL_NORMAL_ARRAY_STRIDE_EXT 0x807F
-#define GL_NORMAL_ARRAY_COUNT_EXT 0x8080
-#define GL_COLOR_ARRAY_SIZE_EXT 0x8081
-#define GL_COLOR_ARRAY_TYPE_EXT 0x8082
-#define GL_COLOR_ARRAY_STRIDE_EXT 0x8083
-#define GL_COLOR_ARRAY_COUNT_EXT 0x8084
-#define GL_INDEX_ARRAY_TYPE_EXT 0x8085
-#define GL_INDEX_ARRAY_STRIDE_EXT 0x8086
-#define GL_INDEX_ARRAY_COUNT_EXT 0x8087
-#define GL_TEXTURE_COORD_ARRAY_SIZE_EXT 0x8088
-#define GL_TEXTURE_COORD_ARRAY_TYPE_EXT 0x8089
-#define GL_TEXTURE_COORD_ARRAY_STRIDE_EXT 0x808A
-#define GL_TEXTURE_COORD_ARRAY_COUNT_EXT 0x808B
-#define GL_EDGE_FLAG_ARRAY_STRIDE_EXT 0x808C
-#define GL_EDGE_FLAG_ARRAY_COUNT_EXT 0x808D
-#define GL_VERTEX_ARRAY_POINTER_EXT 0x808E
-#define GL_NORMAL_ARRAY_POINTER_EXT 0x808F
-#define GL_COLOR_ARRAY_POINTER_EXT 0x8090
-#define GL_INDEX_ARRAY_POINTER_EXT 0x8091
-#define GL_TEXTURE_COORD_ARRAY_POINTER_EXT 0x8092
-#define GL_EDGE_FLAG_ARRAY_POINTER_EXT 0x8093
-#endif
-
-#ifndef GL_EXT_misc_attribute
-#endif
-
-#ifndef GL_SGIS_generate_mipmap
-#define GL_GENERATE_MIPMAP_SGIS 0x8191
-#define GL_GENERATE_MIPMAP_HINT_SGIS 0x8192
-#endif
-
-#ifndef GL_SGIX_clipmap
-#define GL_LINEAR_CLIPMAP_LINEAR_SGIX 0x8170
-#define GL_TEXTURE_CLIPMAP_CENTER_SGIX 0x8171
-#define GL_TEXTURE_CLIPMAP_FRAME_SGIX 0x8172
-#define GL_TEXTURE_CLIPMAP_OFFSET_SGIX 0x8173
-#define GL_TEXTURE_CLIPMAP_VIRTUAL_DEPTH_SGIX 0x8174
-#define GL_TEXTURE_CLIPMAP_LOD_OFFSET_SGIX 0x8175
-#define GL_TEXTURE_CLIPMAP_DEPTH_SGIX 0x8176
-#define GL_MAX_CLIPMAP_DEPTH_SGIX 0x8177
-#define GL_MAX_CLIPMAP_VIRTUAL_DEPTH_SGIX 0x8178
-#define GL_NEAREST_CLIPMAP_NEAREST_SGIX 0x844D
-#define GL_NEAREST_CLIPMAP_LINEAR_SGIX 0x844E
-#define GL_LINEAR_CLIPMAP_NEAREST_SGIX 0x844F
-#endif
-
-#ifndef GL_SGIX_shadow
-#define GL_TEXTURE_COMPARE_SGIX 0x819A
-#define GL_TEXTURE_COMPARE_OPERATOR_SGIX 0x819B
-#define GL_TEXTURE_LEQUAL_R_SGIX 0x819C
-#define GL_TEXTURE_GEQUAL_R_SGIX 0x819D
-#endif
-
-#ifndef GL_SGIS_texture_edge_clamp
-#define GL_CLAMP_TO_EDGE_SGIS 0x812F
-#endif
-
-#ifndef GL_SGIS_texture_border_clamp
-#define GL_CLAMP_TO_BORDER_SGIS 0x812D
-#endif
-
-#ifndef GL_EXT_blend_minmax
-#define GL_FUNC_ADD_EXT 0x8006
-#define GL_MIN_EXT 0x8007
-#define GL_MAX_EXT 0x8008
-#define GL_BLEND_EQUATION_EXT 0x8009
-#endif
-
-#ifndef GL_EXT_blend_subtract
-#define GL_FUNC_SUBTRACT_EXT 0x800A
-#define GL_FUNC_REVERSE_SUBTRACT_EXT 0x800B
-#endif
-
-#ifndef GL_EXT_blend_logic_op
-#endif
-
-#ifndef GL_SGIX_interlace
-#define GL_INTERLACE_SGIX 0x8094
-#endif
-
-#ifndef GL_SGIX_pixel_tiles
-#define GL_PIXEL_TILE_BEST_ALIGNMENT_SGIX 0x813E
-#define GL_PIXEL_TILE_CACHE_INCREMENT_SGIX 0x813F
-#define GL_PIXEL_TILE_WIDTH_SGIX 0x8140
-#define GL_PIXEL_TILE_HEIGHT_SGIX 0x8141
-#define GL_PIXEL_TILE_GRID_WIDTH_SGIX 0x8142
-#define GL_PIXEL_TILE_GRID_HEIGHT_SGIX 0x8143
-#define GL_PIXEL_TILE_GRID_DEPTH_SGIX 0x8144
-#define GL_PIXEL_TILE_CACHE_SIZE_SGIX 0x8145
-#endif
-
-#ifndef GL_SGIS_texture_select
-#define GL_DUAL_ALPHA4_SGIS 0x8110
-#define GL_DUAL_ALPHA8_SGIS 0x8111
-#define GL_DUAL_ALPHA12_SGIS 0x8112
-#define GL_DUAL_ALPHA16_SGIS 0x8113
-#define GL_DUAL_LUMINANCE4_SGIS 0x8114
-#define GL_DUAL_LUMINANCE8_SGIS 0x8115
-#define GL_DUAL_LUMINANCE12_SGIS 0x8116
-#define GL_DUAL_LUMINANCE16_SGIS 0x8117
-#define GL_DUAL_INTENSITY4_SGIS 0x8118
-#define GL_DUAL_INTENSITY8_SGIS 0x8119
-#define GL_DUAL_INTENSITY12_SGIS 0x811A
-#define GL_DUAL_INTENSITY16_SGIS 0x811B
-#define GL_DUAL_LUMINANCE_ALPHA4_SGIS 0x811C
-#define GL_DUAL_LUMINANCE_ALPHA8_SGIS 0x811D
-#define GL_QUAD_ALPHA4_SGIS 0x811E
-#define GL_QUAD_ALPHA8_SGIS 0x811F
-#define GL_QUAD_LUMINANCE4_SGIS 0x8120
-#define GL_QUAD_LUMINANCE8_SGIS 0x8121
-#define GL_QUAD_INTENSITY4_SGIS 0x8122
-#define GL_QUAD_INTENSITY8_SGIS 0x8123
-#define GL_DUAL_TEXTURE_SELECT_SGIS 0x8124
-#define GL_QUAD_TEXTURE_SELECT_SGIS 0x8125
-#endif
-
-#ifndef GL_SGIX_sprite
-#define GL_SPRITE_SGIX 0x8148
-#define GL_SPRITE_MODE_SGIX 0x8149
-#define GL_SPRITE_AXIS_SGIX 0x814A
-#define GL_SPRITE_TRANSLATION_SGIX 0x814B
-#define GL_SPRITE_AXIAL_SGIX 0x814C
-#define GL_SPRITE_OBJECT_ALIGNED_SGIX 0x814D
-#define GL_SPRITE_EYE_ALIGNED_SGIX 0x814E
-#endif
-
-#ifndef GL_SGIX_texture_multi_buffer
-#define GL_TEXTURE_MULTI_BUFFER_HINT_SGIX 0x812E
-#endif
-
-#ifndef GL_EXT_point_parameters
-#define GL_POINT_SIZE_MIN_EXT 0x8126
-#define GL_POINT_SIZE_MAX_EXT 0x8127
-#define GL_POINT_FADE_THRESHOLD_SIZE_EXT 0x8128
-#define GL_DISTANCE_ATTENUATION_EXT 0x8129
-#endif
-
-#ifndef GL_SGIS_point_parameters
-#define GL_POINT_SIZE_MIN_SGIS 0x8126
-#define GL_POINT_SIZE_MAX_SGIS 0x8127
-#define GL_POINT_FADE_THRESHOLD_SIZE_SGIS 0x8128
-#define GL_DISTANCE_ATTENUATION_SGIS 0x8129
-#endif
-
-#ifndef GL_SGIX_instruments
-#define GL_INSTRUMENT_BUFFER_POINTER_SGIX 0x8180
-#define GL_INSTRUMENT_MEASUREMENTS_SGIX 0x8181
-#endif
-
-#ifndef GL_SGIX_texture_scale_bias
-#define GL_POST_TEXTURE_FILTER_BIAS_SGIX 0x8179
-#define GL_POST_TEXTURE_FILTER_SCALE_SGIX 0x817A
-#define GL_POST_TEXTURE_FILTER_BIAS_RANGE_SGIX 0x817B
-#define GL_POST_TEXTURE_FILTER_SCALE_RANGE_SGIX 0x817C
-#endif
-
-#ifndef GL_SGIX_framezoom
-#define GL_FRAMEZOOM_SGIX 0x818B
-#define GL_FRAMEZOOM_FACTOR_SGIX 0x818C
-#define GL_MAX_FRAMEZOOM_FACTOR_SGIX 0x818D
-#endif
-
-#ifndef GL_SGIX_tag_sample_buffer
-#endif
-
-#ifndef GL_FfdMaskSGIX
-#define GL_TEXTURE_DEFORMATION_BIT_SGIX 0x00000001
-#define GL_GEOMETRY_DEFORMATION_BIT_SGIX 0x00000002
-#endif
-
-#ifndef GL_SGIX_polynomial_ffd
-#define GL_GEOMETRY_DEFORMATION_SGIX 0x8194
-#define GL_TEXTURE_DEFORMATION_SGIX 0x8195
-#define GL_DEFORMATIONS_MASK_SGIX 0x8196
-#define GL_MAX_DEFORMATION_ORDER_SGIX 0x8197
-#endif
-
-#ifndef GL_SGIX_reference_plane
-#define GL_REFERENCE_PLANE_SGIX 0x817D
-#define GL_REFERENCE_PLANE_EQUATION_SGIX 0x817E
-#endif
-
-#ifndef GL_SGIX_flush_raster
-#endif
-
-#ifndef GL_SGIX_depth_texture
-#define GL_DEPTH_COMPONENT16_SGIX 0x81A5
-#define GL_DEPTH_COMPONENT24_SGIX 0x81A6
-#define GL_DEPTH_COMPONENT32_SGIX 0x81A7
-#endif
-
-#ifndef GL_SGIS_fog_function
-#define GL_FOG_FUNC_SGIS 0x812A
-#define GL_FOG_FUNC_POINTS_SGIS 0x812B
-#define GL_MAX_FOG_FUNC_POINTS_SGIS 0x812C
-#endif
-
-#ifndef GL_SGIX_fog_offset
-#define GL_FOG_OFFSET_SGIX 0x8198
-#define GL_FOG_OFFSET_VALUE_SGIX 0x8199
-#endif
-
-#ifndef GL_HP_image_transform
-#define GL_IMAGE_SCALE_X_HP 0x8155
-#define GL_IMAGE_SCALE_Y_HP 0x8156
-#define GL_IMAGE_TRANSLATE_X_HP 0x8157
-#define GL_IMAGE_TRANSLATE_Y_HP 0x8158
-#define GL_IMAGE_ROTATE_ANGLE_HP 0x8159
-#define GL_IMAGE_ROTATE_ORIGIN_X_HP 0x815A
-#define GL_IMAGE_ROTATE_ORIGIN_Y_HP 0x815B
-#define GL_IMAGE_MAG_FILTER_HP 0x815C
-#define GL_IMAGE_MIN_FILTER_HP 0x815D
-#define GL_IMAGE_CUBIC_WEIGHT_HP 0x815E
-#define GL_CUBIC_HP 0x815F
-#define GL_AVERAGE_HP 0x8160
-#define GL_IMAGE_TRANSFORM_2D_HP 0x8161
-#define GL_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP 0x8162
-#define GL_PROXY_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP 0x8163
-#endif
-
-#ifndef GL_HP_convolution_border_modes
-#define GL_IGNORE_BORDER_HP 0x8150
-#define GL_CONSTANT_BORDER_HP 0x8151
-#define GL_REPLICATE_BORDER_HP 0x8153
-#define GL_CONVOLUTION_BORDER_COLOR_HP 0x8154
-#endif
-
-#ifndef GL_INGR_palette_buffer
-#endif
-
-#ifndef GL_SGIX_texture_add_env
-#define GL_TEXTURE_ENV_BIAS_SGIX 0x80BE
-#endif
-
-#ifndef GL_EXT_color_subtable
-#endif
-
-#ifndef GL_PGI_vertex_hints
-#define GL_VERTEX_DATA_HINT_PGI 0x1A22A
-#define GL_VERTEX_CONSISTENT_HINT_PGI 0x1A22B
-#define GL_MATERIAL_SIDE_HINT_PGI 0x1A22C
-#define GL_MAX_VERTEX_HINT_PGI 0x1A22D
-#define GL_COLOR3_BIT_PGI 0x00010000
-#define GL_COLOR4_BIT_PGI 0x00020000
-#define GL_EDGEFLAG_BIT_PGI 0x00040000
-#define GL_INDEX_BIT_PGI 0x00080000
-#define GL_MAT_AMBIENT_BIT_PGI 0x00100000
-#define GL_MAT_AMBIENT_AND_DIFFUSE_BIT_PGI 0x00200000
-#define GL_MAT_DIFFUSE_BIT_PGI 0x00400000
-#define GL_MAT_EMISSION_BIT_PGI 0x00800000
-#define GL_MAT_COLOR_INDEXES_BIT_PGI 0x01000000
-#define GL_MAT_SHININESS_BIT_PGI 0x02000000
-#define GL_MAT_SPECULAR_BIT_PGI 0x04000000
-#define GL_NORMAL_BIT_PGI 0x08000000
-#define GL_TEXCOORD1_BIT_PGI 0x10000000
-#define GL_TEXCOORD2_BIT_PGI 0x20000000
-#define GL_TEXCOORD3_BIT_PGI 0x40000000
-#define GL_TEXCOORD4_BIT_PGI 0x80000000
-#define GL_VERTEX23_BIT_PGI 0x00000004
-#define GL_VERTEX4_BIT_PGI 0x00000008
-#endif
-
-#ifndef GL_PGI_misc_hints
-#define GL_PREFER_DOUBLEBUFFER_HINT_PGI 0x1A1F8
-#define GL_CONSERVE_MEMORY_HINT_PGI 0x1A1FD
-#define GL_RECLAIM_MEMORY_HINT_PGI 0x1A1FE
-#define GL_NATIVE_GRAPHICS_HANDLE_PGI 0x1A202
-#define GL_NATIVE_GRAPHICS_BEGIN_HINT_PGI 0x1A203
-#define GL_NATIVE_GRAPHICS_END_HINT_PGI 0x1A204
-#define GL_ALWAYS_FAST_HINT_PGI 0x1A20C
-#define GL_ALWAYS_SOFT_HINT_PGI 0x1A20D
-#define GL_ALLOW_DRAW_OBJ_HINT_PGI 0x1A20E
-#define GL_ALLOW_DRAW_WIN_HINT_PGI 0x1A20F
-#define GL_ALLOW_DRAW_FRG_HINT_PGI 0x1A210
-#define GL_ALLOW_DRAW_MEM_HINT_PGI 0x1A211
-#define GL_STRICT_DEPTHFUNC_HINT_PGI 0x1A216
-#define GL_STRICT_LIGHTING_HINT_PGI 0x1A217
-#define GL_STRICT_SCISSOR_HINT_PGI 0x1A218
-#define GL_FULL_STIPPLE_HINT_PGI 0x1A219
-#define GL_CLIP_NEAR_HINT_PGI 0x1A220
-#define GL_CLIP_FAR_HINT_PGI 0x1A221
-#define GL_WIDE_LINE_HINT_PGI 0x1A222
-#define GL_BACK_NORMALS_HINT_PGI 0x1A223
-#endif
-
-#ifndef GL_EXT_paletted_texture
-#define GL_COLOR_INDEX1_EXT 0x80E2
-#define GL_COLOR_INDEX2_EXT 0x80E3
-#define GL_COLOR_INDEX4_EXT 0x80E4
-#define GL_COLOR_INDEX8_EXT 0x80E5
-#define GL_COLOR_INDEX12_EXT 0x80E6
-#define GL_COLOR_INDEX16_EXT 0x80E7
-#define GL_TEXTURE_INDEX_SIZE_EXT 0x80ED
-#endif
-
-#ifndef GL_EXT_clip_volume_hint
-#define GL_CLIP_VOLUME_CLIPPING_HINT_EXT 0x80F0
-#endif
-
-#ifndef GL_SGIX_list_priority
-#define GL_LIST_PRIORITY_SGIX 0x8182
-#endif
-
-#ifndef GL_SGIX_ir_instrument1
-#define GL_IR_INSTRUMENT1_SGIX 0x817F
-#endif
-
-#ifndef GL_SGIX_calligraphic_fragment
-#define GL_CALLIGRAPHIC_FRAGMENT_SGIX 0x8183
-#endif
-
-#ifndef GL_SGIX_texture_lod_bias
-#define GL_TEXTURE_LOD_BIAS_S_SGIX 0x818E
-#define GL_TEXTURE_LOD_BIAS_T_SGIX 0x818F
-#define GL_TEXTURE_LOD_BIAS_R_SGIX 0x8190
-#endif
-
-#ifndef GL_SGIX_shadow_ambient
-#define GL_SHADOW_AMBIENT_SGIX 0x80BF
-#endif
-
-#ifndef GL_EXT_index_texture
-#endif
-
-#ifndef GL_EXT_index_material
-#define GL_INDEX_MATERIAL_EXT 0x81B8
-#define GL_INDEX_MATERIAL_PARAMETER_EXT 0x81B9
-#define GL_INDEX_MATERIAL_FACE_EXT 0x81BA
-#endif
-
-#ifndef GL_EXT_index_func
-#define GL_INDEX_TEST_EXT 0x81B5
-#define GL_INDEX_TEST_FUNC_EXT 0x81B6
-#define GL_INDEX_TEST_REF_EXT 0x81B7
-#endif
-
-#ifndef GL_EXT_index_array_formats
-#define GL_IUI_V2F_EXT 0x81AD
-#define GL_IUI_V3F_EXT 0x81AE
-#define GL_IUI_N3F_V2F_EXT 0x81AF
-#define GL_IUI_N3F_V3F_EXT 0x81B0
-#define GL_T2F_IUI_V2F_EXT 0x81B1
-#define GL_T2F_IUI_V3F_EXT 0x81B2
-#define GL_T2F_IUI_N3F_V2F_EXT 0x81B3
-#define GL_T2F_IUI_N3F_V3F_EXT 0x81B4
-#endif
-
-#ifndef GL_EXT_compiled_vertex_array
-#define GL_ARRAY_ELEMENT_LOCK_FIRST_EXT 0x81A8
-#define GL_ARRAY_ELEMENT_LOCK_COUNT_EXT 0x81A9
-#endif
-
-#ifndef GL_EXT_cull_vertex
-#define GL_CULL_VERTEX_EXT 0x81AA
-#define GL_CULL_VERTEX_EYE_POSITION_EXT 0x81AB
-#define GL_CULL_VERTEX_OBJECT_POSITION_EXT 0x81AC
-#endif
-
-#ifndef GL_SGIX_ycrcb
-#define GL_YCRCB_422_SGIX 0x81BB
-#define GL_YCRCB_444_SGIX 0x81BC
-#endif
-
-#ifndef GL_SGIX_fragment_lighting
-#define GL_FRAGMENT_LIGHTING_SGIX 0x8400
-#define GL_FRAGMENT_COLOR_MATERIAL_SGIX 0x8401
-#define GL_FRAGMENT_COLOR_MATERIAL_FACE_SGIX 0x8402
-#define GL_FRAGMENT_COLOR_MATERIAL_PARAMETER_SGIX 0x8403
-#define GL_MAX_FRAGMENT_LIGHTS_SGIX 0x8404
-#define GL_MAX_ACTIVE_LIGHTS_SGIX 0x8405
-#define GL_CURRENT_RASTER_NORMAL_SGIX 0x8406
-#define GL_LIGHT_ENV_MODE_SGIX 0x8407
-#define GL_FRAGMENT_LIGHT_MODEL_LOCAL_VIEWER_SGIX 0x8408
-#define GL_FRAGMENT_LIGHT_MODEL_TWO_SIDE_SGIX 0x8409
-#define GL_FRAGMENT_LIGHT_MODEL_AMBIENT_SGIX 0x840A
-#define GL_FRAGMENT_LIGHT_MODEL_NORMAL_INTERPOLATION_SGIX 0x840B
-#define GL_FRAGMENT_LIGHT0_SGIX 0x840C
-#define GL_FRAGMENT_LIGHT1_SGIX 0x840D
-#define GL_FRAGMENT_LIGHT2_SGIX 0x840E
-#define GL_FRAGMENT_LIGHT3_SGIX 0x840F
-#define GL_FRAGMENT_LIGHT4_SGIX 0x8410
-#define GL_FRAGMENT_LIGHT5_SGIX 0x8411
-#define GL_FRAGMENT_LIGHT6_SGIX 0x8412
-#define GL_FRAGMENT_LIGHT7_SGIX 0x8413
-#endif
-
-#ifndef GL_IBM_rasterpos_clip
-#define GL_RASTER_POSITION_UNCLIPPED_IBM 0x19262
-#endif
-
-#ifndef GL_HP_texture_lighting
-#define GL_TEXTURE_LIGHTING_MODE_HP 0x8167
-#define GL_TEXTURE_POST_SPECULAR_HP 0x8168
-#define GL_TEXTURE_PRE_SPECULAR_HP 0x8169
-#endif
-
-#ifndef GL_EXT_draw_range_elements
-#define GL_MAX_ELEMENTS_VERTICES_EXT 0x80E8
-#define GL_MAX_ELEMENTS_INDICES_EXT 0x80E9
-#endif
-
-#ifndef GL_WIN_phong_shading
-#define GL_PHONG_WIN 0x80EA
-#define GL_PHONG_HINT_WIN 0x80EB
-#endif
-
-#ifndef GL_WIN_specular_fog
-#define GL_FOG_SPECULAR_TEXTURE_WIN 0x80EC
-#endif
-
-#ifndef GL_EXT_light_texture
-#define GL_FRAGMENT_MATERIAL_EXT 0x8349
-#define GL_FRAGMENT_NORMAL_EXT 0x834A
-#define GL_FRAGMENT_COLOR_EXT 0x834C
-#define GL_ATTENUATION_EXT 0x834D
-#define GL_SHADOW_ATTENUATION_EXT 0x834E
-#define GL_TEXTURE_APPLICATION_MODE_EXT 0x834F
-#define GL_TEXTURE_LIGHT_EXT 0x8350
-#define GL_TEXTURE_MATERIAL_FACE_EXT 0x8351
-#define GL_TEXTURE_MATERIAL_PARAMETER_EXT 0x8352
-/* reuse GL_FRAGMENT_DEPTH_EXT */
-#endif
-
-#ifndef GL_SGIX_blend_alpha_minmax
-#define GL_ALPHA_MIN_SGIX 0x8320
-#define GL_ALPHA_MAX_SGIX 0x8321
-#endif
-
-#ifndef GL_SGIX_impact_pixel_texture
-#define GL_PIXEL_TEX_GEN_Q_CEILING_SGIX 0x8184
-#define GL_PIXEL_TEX_GEN_Q_ROUND_SGIX 0x8185
-#define GL_PIXEL_TEX_GEN_Q_FLOOR_SGIX 0x8186
-#define GL_PIXEL_TEX_GEN_ALPHA_REPLACE_SGIX 0x8187
-#define GL_PIXEL_TEX_GEN_ALPHA_NO_REPLACE_SGIX 0x8188
-#define GL_PIXEL_TEX_GEN_ALPHA_LS_SGIX 0x8189
-#define GL_PIXEL_TEX_GEN_ALPHA_MS_SGIX 0x818A
-#endif
-
-#ifndef GL_EXT_bgra
-#define GL_BGR_EXT 0x80E0
-#define GL_BGRA_EXT 0x80E1
-#endif
-
-#ifndef GL_SGIX_async
-#define GL_ASYNC_MARKER_SGIX 0x8329
-#endif
-
-#ifndef GL_SGIX_async_pixel
-#define GL_ASYNC_TEX_IMAGE_SGIX 0x835C
-#define GL_ASYNC_DRAW_PIXELS_SGIX 0x835D
-#define GL_ASYNC_READ_PIXELS_SGIX 0x835E
-#define GL_MAX_ASYNC_TEX_IMAGE_SGIX 0x835F
-#define GL_MAX_ASYNC_DRAW_PIXELS_SGIX 0x8360
-#define GL_MAX_ASYNC_READ_PIXELS_SGIX 0x8361
-#endif
-
-#ifndef GL_SGIX_async_histogram
-#define GL_ASYNC_HISTOGRAM_SGIX 0x832C
-#define GL_MAX_ASYNC_HISTOGRAM_SGIX 0x832D
-#endif
-
-#ifndef GL_INTEL_texture_scissor
-#endif
-
-#ifndef GL_INTEL_parallel_arrays
-#define GL_PARALLEL_ARRAYS_INTEL 0x83F4
-#define GL_VERTEX_ARRAY_PARALLEL_POINTERS_INTEL 0x83F5
-#define GL_NORMAL_ARRAY_PARALLEL_POINTERS_INTEL 0x83F6
-#define GL_COLOR_ARRAY_PARALLEL_POINTERS_INTEL 0x83F7
-#define GL_TEXTURE_COORD_ARRAY_PARALLEL_POINTERS_INTEL 0x83F8
-#endif
-
-#ifndef GL_HP_occlusion_test
-#define GL_OCCLUSION_TEST_HP 0x8165
-#define GL_OCCLUSION_TEST_RESULT_HP 0x8166
-#endif
-
-#ifndef GL_EXT_pixel_transform
-#define GL_PIXEL_TRANSFORM_2D_EXT 0x8330
-#define GL_PIXEL_MAG_FILTER_EXT 0x8331
-#define GL_PIXEL_MIN_FILTER_EXT 0x8332
-#define GL_PIXEL_CUBIC_WEIGHT_EXT 0x8333
-#define GL_CUBIC_EXT 0x8334
-#define GL_AVERAGE_EXT 0x8335
-#define GL_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT 0x8336
-#define GL_MAX_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT 0x8337
-#define GL_PIXEL_TRANSFORM_2D_MATRIX_EXT 0x8338
-#endif
-
-#ifndef GL_EXT_pixel_transform_color_table
-#endif
-
-#ifndef GL_EXT_shared_texture_palette
-#define GL_SHARED_TEXTURE_PALETTE_EXT 0x81FB
-#endif
-
-#ifndef GL_EXT_separate_specular_color
-#define GL_LIGHT_MODEL_COLOR_CONTROL_EXT 0x81F8
-#define GL_SINGLE_COLOR_EXT 0x81F9
-#define GL_SEPARATE_SPECULAR_COLOR_EXT 0x81FA
-#endif
-
-#ifndef GL_EXT_secondary_color
-#define GL_COLOR_SUM_EXT 0x8458
-#define GL_CURRENT_SECONDARY_COLOR_EXT 0x8459
-#define GL_SECONDARY_COLOR_ARRAY_SIZE_EXT 0x845A
-#define GL_SECONDARY_COLOR_ARRAY_TYPE_EXT 0x845B
-#define GL_SECONDARY_COLOR_ARRAY_STRIDE_EXT 0x845C
-#define GL_SECONDARY_COLOR_ARRAY_POINTER_EXT 0x845D
-#define GL_SECONDARY_COLOR_ARRAY_EXT 0x845E
-#endif
-
-#ifndef GL_EXT_texture_perturb_normal
-#define GL_PERTURB_EXT 0x85AE
-#define GL_TEXTURE_NORMAL_EXT 0x85AF
-#endif
-
-#ifndef GL_EXT_multi_draw_arrays
-#endif
-
-#ifndef GL_EXT_fog_coord
-#define GL_FOG_COORDINATE_SOURCE_EXT 0x8450
-#define GL_FOG_COORDINATE_EXT 0x8451
-#define GL_FRAGMENT_DEPTH_EXT 0x8452
-#define GL_CURRENT_FOG_COORDINATE_EXT 0x8453
-#define GL_FOG_COORDINATE_ARRAY_TYPE_EXT 0x8454
-#define GL_FOG_COORDINATE_ARRAY_STRIDE_EXT 0x8455
-#define GL_FOG_COORDINATE_ARRAY_POINTER_EXT 0x8456
-#define GL_FOG_COORDINATE_ARRAY_EXT 0x8457
-#endif
-
-#ifndef GL_REND_screen_coordinates
-#define GL_SCREEN_COORDINATES_REND 0x8490
-#define GL_INVERTED_SCREEN_W_REND 0x8491
-#endif
-
-#ifndef GL_EXT_coordinate_frame
-#define GL_TANGENT_ARRAY_EXT 0x8439
-#define GL_BINORMAL_ARRAY_EXT 0x843A
-#define GL_CURRENT_TANGENT_EXT 0x843B
-#define GL_CURRENT_BINORMAL_EXT 0x843C
-#define GL_TANGENT_ARRAY_TYPE_EXT 0x843E
-#define GL_TANGENT_ARRAY_STRIDE_EXT 0x843F
-#define GL_BINORMAL_ARRAY_TYPE_EXT 0x8440
-#define GL_BINORMAL_ARRAY_STRIDE_EXT 0x8441
-#define GL_TANGENT_ARRAY_POINTER_EXT 0x8442
-#define GL_BINORMAL_ARRAY_POINTER_EXT 0x8443
-#define GL_MAP1_TANGENT_EXT 0x8444
-#define GL_MAP2_TANGENT_EXT 0x8445
-#define GL_MAP1_BINORMAL_EXT 0x8446
-#define GL_MAP2_BINORMAL_EXT 0x8447
-#endif
-
-#ifndef GL_EXT_texture_env_combine
-#define GL_COMBINE_EXT 0x8570
-#define GL_COMBINE_RGB_EXT 0x8571
-#define GL_COMBINE_ALPHA_EXT 0x8572
-#define GL_RGB_SCALE_EXT 0x8573
-#define GL_ADD_SIGNED_EXT 0x8574
-#define GL_INTERPOLATE_EXT 0x8575
-#define GL_CONSTANT_EXT 0x8576
-#define GL_PRIMARY_COLOR_EXT 0x8577
-#define GL_PREVIOUS_EXT 0x8578
-#define GL_SOURCE0_RGB_EXT 0x8580
-#define GL_SOURCE1_RGB_EXT 0x8581
-#define GL_SOURCE2_RGB_EXT 0x8582
-#define GL_SOURCE0_ALPHA_EXT 0x8588
-#define GL_SOURCE1_ALPHA_EXT 0x8589
-#define GL_SOURCE2_ALPHA_EXT 0x858A
-#define GL_OPERAND0_RGB_EXT 0x8590
-#define GL_OPERAND1_RGB_EXT 0x8591
-#define GL_OPERAND2_RGB_EXT 0x8592
-#define GL_OPERAND0_ALPHA_EXT 0x8598
-#define GL_OPERAND1_ALPHA_EXT 0x8599
-#define GL_OPERAND2_ALPHA_EXT 0x859A
-#endif
-
-#ifndef GL_APPLE_specular_vector
-#define GL_LIGHT_MODEL_SPECULAR_VECTOR_APPLE 0x85B0
-#endif
-
-#ifndef GL_APPLE_transform_hint
-#define GL_TRANSFORM_HINT_APPLE 0x85B1
-#endif
-
-#ifndef GL_SGIX_fog_scale
-#define GL_FOG_SCALE_SGIX 0x81FC
-#define GL_FOG_SCALE_VALUE_SGIX 0x81FD
-#endif
-
-#ifndef GL_SUNX_constant_data
-#define GL_UNPACK_CONSTANT_DATA_SUNX 0x81D5
-#define GL_TEXTURE_CONSTANT_DATA_SUNX 0x81D6
-#endif
-
-#ifndef GL_SUN_global_alpha
-#define GL_GLOBAL_ALPHA_SUN 0x81D9
-#define GL_GLOBAL_ALPHA_FACTOR_SUN 0x81DA
-#endif
-
-#ifndef GL_SUN_triangle_list
-#define GL_RESTART_SUN 0x0001
-#define GL_REPLACE_MIDDLE_SUN 0x0002
-#define GL_REPLACE_OLDEST_SUN 0x0003
-#define GL_TRIANGLE_LIST_SUN 0x81D7
-#define GL_REPLACEMENT_CODE_SUN 0x81D8
-#define GL_REPLACEMENT_CODE_ARRAY_SUN 0x85C0
-#define GL_REPLACEMENT_CODE_ARRAY_TYPE_SUN 0x85C1
-#define GL_REPLACEMENT_CODE_ARRAY_STRIDE_SUN 0x85C2
-#define GL_REPLACEMENT_CODE_ARRAY_POINTER_SUN 0x85C3
-#define GL_R1UI_V3F_SUN 0x85C4
-#define GL_R1UI_C4UB_V3F_SUN 0x85C5
-#define GL_R1UI_C3F_V3F_SUN 0x85C6
-#define GL_R1UI_N3F_V3F_SUN 0x85C7
-#define GL_R1UI_C4F_N3F_V3F_SUN 0x85C8
-#define GL_R1UI_T2F_V3F_SUN 0x85C9
-#define GL_R1UI_T2F_N3F_V3F_SUN 0x85CA
-#define GL_R1UI_T2F_C4F_N3F_V3F_SUN 0x85CB
-#endif
-
-#ifndef GL_SUN_vertex
-#endif
-
-#ifndef GL_EXT_blend_func_separate
-#define GL_BLEND_DST_RGB_EXT 0x80C8
-#define GL_BLEND_SRC_RGB_EXT 0x80C9
-#define GL_BLEND_DST_ALPHA_EXT 0x80CA
-#define GL_BLEND_SRC_ALPHA_EXT 0x80CB
-#endif
-
-#ifndef GL_INGR_color_clamp
-#define GL_RED_MIN_CLAMP_INGR 0x8560
-#define GL_GREEN_MIN_CLAMP_INGR 0x8561
-#define GL_BLUE_MIN_CLAMP_INGR 0x8562
-#define GL_ALPHA_MIN_CLAMP_INGR 0x8563
-#define GL_RED_MAX_CLAMP_INGR 0x8564
-#define GL_GREEN_MAX_CLAMP_INGR 0x8565
-#define GL_BLUE_MAX_CLAMP_INGR 0x8566
-#define GL_ALPHA_MAX_CLAMP_INGR 0x8567
-#endif
-
-#ifndef GL_INGR_interlace_read
-#define GL_INTERLACE_READ_INGR 0x8568
-#endif
-
-#ifndef GL_EXT_stencil_wrap
-#define GL_INCR_WRAP_EXT 0x8507
-#define GL_DECR_WRAP_EXT 0x8508
-#endif
-
-#ifndef GL_EXT_422_pixels
-#define GL_422_EXT 0x80CC
-#define GL_422_REV_EXT 0x80CD
-#define GL_422_AVERAGE_EXT 0x80CE
-#define GL_422_REV_AVERAGE_EXT 0x80CF
-#endif
-
-#ifndef GL_NV_texgen_reflection
-#define GL_NORMAL_MAP_NV 0x8511
-#define GL_REFLECTION_MAP_NV 0x8512
-#endif
-
-#ifndef GL_EXT_texture_cube_map
-#define GL_NORMAL_MAP_EXT 0x8511
-#define GL_REFLECTION_MAP_EXT 0x8512
-#define GL_TEXTURE_CUBE_MAP_EXT 0x8513
-#define GL_TEXTURE_BINDING_CUBE_MAP_EXT 0x8514
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_X_EXT 0x8515
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X_EXT 0x8516
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y_EXT 0x8517
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT 0x8518
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z_EXT 0x8519
-#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT 0x851A
-#define GL_PROXY_TEXTURE_CUBE_MAP_EXT 0x851B
-#define GL_MAX_CUBE_MAP_TEXTURE_SIZE_EXT 0x851C
-#endif
-
-#ifndef GL_SUN_convolution_border_modes
-#define GL_WRAP_BORDER_SUN 0x81D4
-#endif
-
-#ifndef GL_EXT_texture_env_add
-#endif
-
-#ifndef GL_EXT_texture_lod_bias
-#define GL_MAX_TEXTURE_LOD_BIAS_EXT 0x84FD
-#define GL_TEXTURE_FILTER_CONTROL_EXT 0x8500
-#define GL_TEXTURE_LOD_BIAS_EXT 0x8501
-#endif
-
-#ifndef GL_EXT_texture_filter_anisotropic
-#define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
-#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
-#endif
-
-#ifndef GL_EXT_vertex_weighting
-#define GL_MODELVIEW0_STACK_DEPTH_EXT GL_MODELVIEW_STACK_DEPTH
-#define GL_MODELVIEW1_STACK_DEPTH_EXT 0x8502
-#define GL_MODELVIEW0_MATRIX_EXT GL_MODELVIEW_MATRIX
-#define GL_MODELVIEW1_MATRIX_EXT 0x8506
-#define GL_VERTEX_WEIGHTING_EXT 0x8509
-#define GL_MODELVIEW0_EXT GL_MODELVIEW
-#define GL_MODELVIEW1_EXT 0x850A
-#define GL_CURRENT_VERTEX_WEIGHT_EXT 0x850B
-#define GL_VERTEX_WEIGHT_ARRAY_EXT 0x850C
-#define GL_VERTEX_WEIGHT_ARRAY_SIZE_EXT 0x850D
-#define GL_VERTEX_WEIGHT_ARRAY_TYPE_EXT 0x850E
-#define GL_VERTEX_WEIGHT_ARRAY_STRIDE_EXT 0x850F
-#define GL_VERTEX_WEIGHT_ARRAY_POINTER_EXT 0x8510
-#endif
-
-#ifndef GL_NV_light_max_exponent
-#define GL_MAX_SHININESS_NV 0x8504
-#define GL_MAX_SPOT_EXPONENT_NV 0x8505
-#endif
-
-#ifndef GL_NV_vertex_array_range
-#define GL_VERTEX_ARRAY_RANGE_NV 0x851D
-#define GL_VERTEX_ARRAY_RANGE_LENGTH_NV 0x851E
-#define GL_VERTEX_ARRAY_RANGE_VALID_NV 0x851F
-#define GL_MAX_VERTEX_ARRAY_RANGE_ELEMENT_NV 0x8520
-#define GL_VERTEX_ARRAY_RANGE_POINTER_NV 0x8521
-#endif
-
-#ifndef GL_NV_register_combiners
-#define GL_REGISTER_COMBINERS_NV 0x8522
-#define GL_VARIABLE_A_NV 0x8523
-#define GL_VARIABLE_B_NV 0x8524
-#define GL_VARIABLE_C_NV 0x8525
-#define GL_VARIABLE_D_NV 0x8526
-#define GL_VARIABLE_E_NV 0x8527
-#define GL_VARIABLE_F_NV 0x8528
-#define GL_VARIABLE_G_NV 0x8529
-#define GL_CONSTANT_COLOR0_NV 0x852A
-#define GL_CONSTANT_COLOR1_NV 0x852B
-#define GL_PRIMARY_COLOR_NV 0x852C
-#define GL_SECONDARY_COLOR_NV 0x852D
-#define GL_SPARE0_NV 0x852E
-#define GL_SPARE1_NV 0x852F
-#define GL_DISCARD_NV 0x8530
-#define GL_E_TIMES_F_NV 0x8531
-#define GL_SPARE0_PLUS_SECONDARY_COLOR_NV 0x8532
-#define GL_UNSIGNED_IDENTITY_NV 0x8536
-#define GL_UNSIGNED_INVERT_NV 0x8537
-#define GL_EXPAND_NORMAL_NV 0x8538
-#define GL_EXPAND_NEGATE_NV 0x8539
-#define GL_HALF_BIAS_NORMAL_NV 0x853A
-#define GL_HALF_BIAS_NEGATE_NV 0x853B
-#define GL_SIGNED_IDENTITY_NV 0x853C
-#define GL_SIGNED_NEGATE_NV 0x853D
-#define GL_SCALE_BY_TWO_NV 0x853E
-#define GL_SCALE_BY_FOUR_NV 0x853F
-#define GL_SCALE_BY_ONE_HALF_NV 0x8540
-#define GL_BIAS_BY_NEGATIVE_ONE_HALF_NV 0x8541
-#define GL_COMBINER_INPUT_NV 0x8542
-#define GL_COMBINER_MAPPING_NV 0x8543
-#define GL_COMBINER_COMPONENT_USAGE_NV 0x8544
-#define GL_COMBINER_AB_DOT_PRODUCT_NV 0x8545
-#define GL_COMBINER_CD_DOT_PRODUCT_NV 0x8546
-#define GL_COMBINER_MUX_SUM_NV 0x8547
-#define GL_COMBINER_SCALE_NV 0x8548
-#define GL_COMBINER_BIAS_NV 0x8549
-#define GL_COMBINER_AB_OUTPUT_NV 0x854A
-#define GL_COMBINER_CD_OUTPUT_NV 0x854B
-#define GL_COMBINER_SUM_OUTPUT_NV 0x854C
-#define GL_MAX_GENERAL_COMBINERS_NV 0x854D
-#define GL_NUM_GENERAL_COMBINERS_NV 0x854E
-#define GL_COLOR_SUM_CLAMP_NV 0x854F
-#define GL_COMBINER0_NV 0x8550
-#define GL_COMBINER1_NV 0x8551
-#define GL_COMBINER2_NV 0x8552
-#define GL_COMBINER3_NV 0x8553
-#define GL_COMBINER4_NV 0x8554
-#define GL_COMBINER5_NV 0x8555
-#define GL_COMBINER6_NV 0x8556
-#define GL_COMBINER7_NV 0x8557
-/* reuse GL_TEXTURE0_ARB */
-/* reuse GL_TEXTURE1_ARB */
-/* reuse GL_ZERO */
-/* reuse GL_NONE */
-/* reuse GL_FOG */
-#endif
-
-#ifndef GL_NV_fog_distance
-#define GL_FOG_DISTANCE_MODE_NV 0x855A
-#define GL_EYE_RADIAL_NV 0x855B
-#define GL_EYE_PLANE_ABSOLUTE_NV 0x855C
-/* reuse GL_EYE_PLANE */
-#endif
-
-#ifndef GL_NV_texgen_emboss
-#define GL_EMBOSS_LIGHT_NV 0x855D
-#define GL_EMBOSS_CONSTANT_NV 0x855E
-#define GL_EMBOSS_MAP_NV 0x855F
-#endif
-
-#ifndef GL_NV_blend_square
-#endif
-
-#ifndef GL_NV_texture_env_combine4
-#define GL_COMBINE4_NV 0x8503
-#define GL_SOURCE3_RGB_NV 0x8583
-#define GL_SOURCE3_ALPHA_NV 0x858B
-#define GL_OPERAND3_RGB_NV 0x8593
-#define GL_OPERAND3_ALPHA_NV 0x859B
-#endif
-
-#ifndef GL_MESA_resize_buffers
-#endif
-
-#ifndef GL_MESA_window_pos
-#endif
-
-#ifndef GL_EXT_texture_compression_s3tc
-#define GL_COMPRESSED_RGB_S3TC_DXT1_EXT 0x83F0
-#define GL_COMPRESSED_RGBA_S3TC_DXT1_EXT 0x83F1
-#define GL_COMPRESSED_RGBA_S3TC_DXT3_EXT 0x83F2
-#define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT 0x83F3
-#endif
-
-#ifndef GL_IBM_cull_vertex
-#define GL_CULL_VERTEX_IBM 103050
-#endif
-
-#ifndef GL_IBM_multimode_draw_arrays
-#endif
-
-#ifndef GL_IBM_vertex_array_lists
-#define GL_VERTEX_ARRAY_LIST_IBM 103070
-#define GL_NORMAL_ARRAY_LIST_IBM 103071
-#define GL_COLOR_ARRAY_LIST_IBM 103072
-#define GL_INDEX_ARRAY_LIST_IBM 103073
-#define GL_TEXTURE_COORD_ARRAY_LIST_IBM 103074
-#define GL_EDGE_FLAG_ARRAY_LIST_IBM 103075
-#define GL_FOG_COORDINATE_ARRAY_LIST_IBM 103076
-#define GL_SECONDARY_COLOR_ARRAY_LIST_IBM 103077
-#define GL_VERTEX_ARRAY_LIST_STRIDE_IBM 103080
-#define GL_NORMAL_ARRAY_LIST_STRIDE_IBM 103081
-#define GL_COLOR_ARRAY_LIST_STRIDE_IBM 103082
-#define GL_INDEX_ARRAY_LIST_STRIDE_IBM 103083
-#define GL_TEXTURE_COORD_ARRAY_LIST_STRIDE_IBM 103084
-#define GL_EDGE_FLAG_ARRAY_LIST_STRIDE_IBM 103085
-#define GL_FOG_COORDINATE_ARRAY_LIST_STRIDE_IBM 103086
-#define GL_SECONDARY_COLOR_ARRAY_LIST_STRIDE_IBM 103087
-#endif
-
-#ifndef GL_SGIX_subsample
-#define GL_PACK_SUBSAMPLE_RATE_SGIX 0x85A0
-#define GL_UNPACK_SUBSAMPLE_RATE_SGIX 0x85A1
-#define GL_PIXEL_SUBSAMPLE_4444_SGIX 0x85A2
-#define GL_PIXEL_SUBSAMPLE_2424_SGIX 0x85A3
-#define GL_PIXEL_SUBSAMPLE_4242_SGIX 0x85A4
-#endif
-
-#ifndef GL_SGIX_ycrcb_subsample
-#endif
-
-#ifndef GL_SGIX_ycrcba
-#define GL_YCRCB_SGIX 0x8318
-#define GL_YCRCBA_SGIX 0x8319
-#endif
-
-#ifndef GL_SGI_depth_pass_instrument
-#define GL_DEPTH_PASS_INSTRUMENT_SGIX 0x8310
-#define GL_DEPTH_PASS_INSTRUMENT_COUNTERS_SGIX 0x8311
-#define GL_DEPTH_PASS_INSTRUMENT_MAX_SGIX 0x8312
-#endif
-
-#ifndef GL_3DFX_texture_compression_FXT1
-#define GL_COMPRESSED_RGB_FXT1_3DFX 0x86B0
-#define GL_COMPRESSED_RGBA_FXT1_3DFX 0x86B1
-#endif
-
-#ifndef GL_3DFX_multisample
-#define GL_MULTISAMPLE_3DFX 0x86B2
-#define GL_SAMPLE_BUFFERS_3DFX 0x86B3
-#define GL_SAMPLES_3DFX 0x86B4
-#define GL_MULTISAMPLE_BIT_3DFX 0x20000000
-#endif
-
-#ifndef GL_3DFX_tbuffer
-#endif
-
-#ifndef GL_EXT_multisample
-#define GL_MULTISAMPLE_EXT 0x809D
-#define GL_SAMPLE_ALPHA_TO_MASK_EXT 0x809E
-#define GL_SAMPLE_ALPHA_TO_ONE_EXT 0x809F
-#define GL_SAMPLE_MASK_EXT 0x80A0
-#define GL_1PASS_EXT 0x80A1
-#define GL_2PASS_0_EXT 0x80A2
-#define GL_2PASS_1_EXT 0x80A3
-#define GL_4PASS_0_EXT 0x80A4
-#define GL_4PASS_1_EXT 0x80A5
-#define GL_4PASS_2_EXT 0x80A6
-#define GL_4PASS_3_EXT 0x80A7
-#define GL_SAMPLE_BUFFERS_EXT 0x80A8
-#define GL_SAMPLES_EXT 0x80A9
-#define GL_SAMPLE_MASK_VALUE_EXT 0x80AA
-#define GL_SAMPLE_MASK_INVERT_EXT 0x80AB
-#define GL_SAMPLE_PATTERN_EXT 0x80AC
-#define GL_MULTISAMPLE_BIT_EXT 0x20000000
-#endif
-
-#ifndef GL_SGIX_vertex_preclip
-#define GL_VERTEX_PRECLIP_SGIX 0x83EE
-#define GL_VERTEX_PRECLIP_HINT_SGIX 0x83EF
-#endif
-
-#ifndef GL_SGIX_convolution_accuracy
-#define GL_CONVOLUTION_HINT_SGIX 0x8316
-#endif
-
-#ifndef GL_SGIX_resample
-#define GL_PACK_RESAMPLE_SGIX 0x842C
-#define GL_UNPACK_RESAMPLE_SGIX 0x842D
-#define GL_RESAMPLE_REPLICATE_SGIX 0x842E
-#define GL_RESAMPLE_ZERO_FILL_SGIX 0x842F
-#define GL_RESAMPLE_DECIMATE_SGIX 0x8430
-#endif
-
-#ifndef GL_SGIS_point_line_texgen
-#define GL_EYE_DISTANCE_TO_POINT_SGIS 0x81F0
-#define GL_OBJECT_DISTANCE_TO_POINT_SGIS 0x81F1
-#define GL_EYE_DISTANCE_TO_LINE_SGIS 0x81F2
-#define GL_OBJECT_DISTANCE_TO_LINE_SGIS 0x81F3
-#define GL_EYE_POINT_SGIS 0x81F4
-#define GL_OBJECT_POINT_SGIS 0x81F5
-#define GL_EYE_LINE_SGIS 0x81F6
-#define GL_OBJECT_LINE_SGIS 0x81F7
-#endif
-
-#ifndef GL_SGIS_texture_color_mask
-#define GL_TEXTURE_COLOR_WRITEMASK_SGIS 0x81EF
-#endif
-
-#ifndef GL_EXT_texture_env_dot3
-#define GL_DOT3_RGB_EXT 0x8740
-#define GL_DOT3_RGBA_EXT 0x8741
-#endif
-
-#ifndef GL_ATI_texture_mirror_once
-#define GL_MIRROR_CLAMP_ATI 0x8742
-#define GL_MIRROR_CLAMP_TO_EDGE_ATI 0x8743
-#endif
-
-#ifndef GL_NV_fence
-#define GL_ALL_COMPLETED_NV 0x84F2
-#define GL_FENCE_STATUS_NV 0x84F3
-#define GL_FENCE_CONDITION_NV 0x84F4
-#endif
-
-#ifndef GL_IBM_texture_mirrored_repeat
-#define GL_MIRRORED_REPEAT_IBM 0x8370
-#endif
-
-#ifndef GL_NV_evaluators
-#define GL_EVAL_2D_NV 0x86C0
-#define GL_EVAL_TRIANGULAR_2D_NV 0x86C1
-#define GL_MAP_TESSELLATION_NV 0x86C2
-#define GL_MAP_ATTRIB_U_ORDER_NV 0x86C3
-#define GL_MAP_ATTRIB_V_ORDER_NV 0x86C4
-#define GL_EVAL_FRACTIONAL_TESSELLATION_NV 0x86C5
-#define GL_EVAL_VERTEX_ATTRIB0_NV 0x86C6
-#define GL_EVAL_VERTEX_ATTRIB1_NV 0x86C7
-#define GL_EVAL_VERTEX_ATTRIB2_NV 0x86C8
-#define GL_EVAL_VERTEX_ATTRIB3_NV 0x86C9
-#define GL_EVAL_VERTEX_ATTRIB4_NV 0x86CA
-#define GL_EVAL_VERTEX_ATTRIB5_NV 0x86CB
-#define GL_EVAL_VERTEX_ATTRIB6_NV 0x86CC
-#define GL_EVAL_VERTEX_ATTRIB7_NV 0x86CD
-#define GL_EVAL_VERTEX_ATTRIB8_NV 0x86CE
-#define GL_EVAL_VERTEX_ATTRIB9_NV 0x86CF
-#define GL_EVAL_VERTEX_ATTRIB10_NV 0x86D0
-#define GL_EVAL_VERTEX_ATTRIB11_NV 0x86D1
-#define GL_EVAL_VERTEX_ATTRIB12_NV 0x86D2
-#define GL_EVAL_VERTEX_ATTRIB13_NV 0x86D3
-#define GL_EVAL_VERTEX_ATTRIB14_NV 0x86D4
-#define GL_EVAL_VERTEX_ATTRIB15_NV 0x86D5
-#define GL_MAX_MAP_TESSELLATION_NV 0x86D6
-#define GL_MAX_RATIONAL_EVAL_ORDER_NV 0x86D7
-#endif
-
-#ifndef GL_NV_packed_depth_stencil
-#define GL_DEPTH_STENCIL_NV 0x84F9
-#define GL_UNSIGNED_INT_24_8_NV 0x84FA
-#endif
-
-#ifndef GL_NV_register_combiners2
-#define GL_PER_STAGE_CONSTANTS_NV 0x8535
-#endif
-
-#ifndef GL_NV_texture_compression_vtc
-#endif
-
-#ifndef GL_NV_texture_rectangle
-#define GL_TEXTURE_RECTANGLE_NV 0x84F5
-#define GL_TEXTURE_BINDING_RECTANGLE_NV 0x84F6
-#define GL_PROXY_TEXTURE_RECTANGLE_NV 0x84F7
-#define GL_MAX_RECTANGLE_TEXTURE_SIZE_NV 0x84F8
-#endif
-
-#ifndef GL_NV_texture_shader
-#define GL_OFFSET_TEXTURE_RECTANGLE_NV 0x864C
-#define GL_OFFSET_TEXTURE_RECTANGLE_SCALE_NV 0x864D
-#define GL_DOT_PRODUCT_TEXTURE_RECTANGLE_NV 0x864E
-#define GL_RGBA_UNSIGNED_DOT_PRODUCT_MAPPING_NV 0x86D9
-#define GL_UNSIGNED_INT_S8_S8_8_8_NV 0x86DA
-#define GL_UNSIGNED_INT_8_8_S8_S8_REV_NV 0x86DB
-#define GL_DSDT_MAG_INTENSITY_NV 0x86DC
-#define GL_SHADER_CONSISTENT_NV 0x86DD
-#define GL_TEXTURE_SHADER_NV 0x86DE
-#define GL_SHADER_OPERATION_NV 0x86DF
-#define GL_CULL_MODES_NV 0x86E0
-#define GL_OFFSET_TEXTURE_MATRIX_NV 0x86E1
-#define GL_OFFSET_TEXTURE_SCALE_NV 0x86E2
-#define GL_OFFSET_TEXTURE_BIAS_NV 0x86E3
-#define GL_OFFSET_TEXTURE_2D_MATRIX_NV GL_OFFSET_TEXTURE_MATRIX_NV
-#define GL_OFFSET_TEXTURE_2D_SCALE_NV GL_OFFSET_TEXTURE_SCALE_NV
-#define GL_OFFSET_TEXTURE_2D_BIAS_NV GL_OFFSET_TEXTURE_BIAS_NV
-#define GL_PREVIOUS_TEXTURE_INPUT_NV 0x86E4
-#define GL_CONST_EYE_NV 0x86E5
-#define GL_PASS_THROUGH_NV 0x86E6
-#define GL_CULL_FRAGMENT_NV 0x86E7
-#define GL_OFFSET_TEXTURE_2D_NV 0x86E8
-#define GL_DEPENDENT_AR_TEXTURE_2D_NV 0x86E9
-#define GL_DEPENDENT_GB_TEXTURE_2D_NV 0x86EA
-#define GL_DOT_PRODUCT_NV 0x86EC
-#define GL_DOT_PRODUCT_DEPTH_REPLACE_NV 0x86ED
-#define GL_DOT_PRODUCT_TEXTURE_2D_NV 0x86EE
-#define GL_DOT_PRODUCT_TEXTURE_CUBE_MAP_NV 0x86F0
-#define GL_DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV 0x86F1
-#define GL_DOT_PRODUCT_REFLECT_CUBE_MAP_NV 0x86F2
-#define GL_DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV 0x86F3
-#define GL_HILO_NV 0x86F4
-#define GL_DSDT_NV 0x86F5
-#define GL_DSDT_MAG_NV 0x86F6
-#define GL_DSDT_MAG_VIB_NV 0x86F7
-#define GL_HILO16_NV 0x86F8
-#define GL_SIGNED_HILO_NV 0x86F9
-#define GL_SIGNED_HILO16_NV 0x86FA
-#define GL_SIGNED_RGBA_NV 0x86FB
-#define GL_SIGNED_RGBA8_NV 0x86FC
-#define GL_SIGNED_RGB_NV 0x86FE
-#define GL_SIGNED_RGB8_NV 0x86FF
-#define GL_SIGNED_LUMINANCE_NV 0x8701
-#define GL_SIGNED_LUMINANCE8_NV 0x8702
-#define GL_SIGNED_LUMINANCE_ALPHA_NV 0x8703
-#define GL_SIGNED_LUMINANCE8_ALPHA8_NV 0x8704
-#define GL_SIGNED_ALPHA_NV 0x8705
-#define GL_SIGNED_ALPHA8_NV 0x8706
-#define GL_SIGNED_INTENSITY_NV 0x8707
-#define GL_SIGNED_INTENSITY8_NV 0x8708
-#define GL_DSDT8_NV 0x8709
-#define GL_DSDT8_MAG8_NV 0x870A
-#define GL_DSDT8_MAG8_INTENSITY8_NV 0x870B
-#define GL_SIGNED_RGB_UNSIGNED_ALPHA_NV 0x870C
-#define GL_SIGNED_RGB8_UNSIGNED_ALPHA8_NV 0x870D
-#define GL_HI_SCALE_NV 0x870E
-#define GL_LO_SCALE_NV 0x870F
-#define GL_DS_SCALE_NV 0x8710
-#define GL_DT_SCALE_NV 0x8711
-#define GL_MAGNITUDE_SCALE_NV 0x8712
-#define GL_VIBRANCE_SCALE_NV 0x8713
-#define GL_HI_BIAS_NV 0x8714
-#define GL_LO_BIAS_NV 0x8715
-#define GL_DS_BIAS_NV 0x8716
-#define GL_DT_BIAS_NV 0x8717
-#define GL_MAGNITUDE_BIAS_NV 0x8718
-#define GL_VIBRANCE_BIAS_NV 0x8719
-#define GL_TEXTURE_BORDER_VALUES_NV 0x871A
-#define GL_TEXTURE_HI_SIZE_NV 0x871B
-#define GL_TEXTURE_LO_SIZE_NV 0x871C
-#define GL_TEXTURE_DS_SIZE_NV 0x871D
-#define GL_TEXTURE_DT_SIZE_NV 0x871E
-#define GL_TEXTURE_MAG_SIZE_NV 0x871F
-#endif
-
-#ifndef GL_NV_texture_shader2
-#define GL_DOT_PRODUCT_TEXTURE_3D_NV 0x86EF
-#endif
-
-#ifndef GL_NV_vertex_array_range2
-#define GL_VERTEX_ARRAY_RANGE_WITHOUT_FLUSH_NV 0x8533
-#endif
-
-#ifndef GL_NV_vertex_program
-#define GL_VERTEX_PROGRAM_NV 0x8620
-#define GL_VERTEX_STATE_PROGRAM_NV 0x8621
-#define GL_ATTRIB_ARRAY_SIZE_NV 0x8623
-#define GL_ATTRIB_ARRAY_STRIDE_NV 0x8624
-#define GL_ATTRIB_ARRAY_TYPE_NV 0x8625
-#define GL_CURRENT_ATTRIB_NV 0x8626
-#define GL_PROGRAM_LENGTH_NV 0x8627
-#define GL_PROGRAM_STRING_NV 0x8628
-#define GL_MODELVIEW_PROJECTION_NV 0x8629
-#define GL_IDENTITY_NV 0x862A
-#define GL_INVERSE_NV 0x862B
-#define GL_TRANSPOSE_NV 0x862C
-#define GL_INVERSE_TRANSPOSE_NV 0x862D
-#define GL_MAX_TRACK_MATRIX_STACK_DEPTH_NV 0x862E
-#define GL_MAX_TRACK_MATRICES_NV 0x862F
-#define GL_MATRIX0_NV 0x8630
-#define GL_MATRIX1_NV 0x8631
-#define GL_MATRIX2_NV 0x8632
-#define GL_MATRIX3_NV 0x8633
-#define GL_MATRIX4_NV 0x8634
-#define GL_MATRIX5_NV 0x8635
-#define GL_MATRIX6_NV 0x8636
-#define GL_MATRIX7_NV 0x8637
-#define GL_CURRENT_MATRIX_STACK_DEPTH_NV 0x8640
-#define GL_CURRENT_MATRIX_NV 0x8641
-#define GL_VERTEX_PROGRAM_POINT_SIZE_NV 0x8642
-#define GL_VERTEX_PROGRAM_TWO_SIDE_NV 0x8643
-#define GL_PROGRAM_PARAMETER_NV 0x8644
-#define GL_ATTRIB_ARRAY_POINTER_NV 0x8645
-#define GL_PROGRAM_TARGET_NV 0x8646
-#define GL_PROGRAM_RESIDENT_NV 0x8647
-#define GL_TRACK_MATRIX_NV 0x8648
-#define GL_TRACK_MATRIX_TRANSFORM_NV 0x8649
-#define GL_VERTEX_PROGRAM_BINDING_NV 0x864A
-#define GL_PROGRAM_ERROR_POSITION_NV 0x864B
-#define GL_VERTEX_ATTRIB_ARRAY0_NV 0x8650
-#define GL_VERTEX_ATTRIB_ARRAY1_NV 0x8651
-#define GL_VERTEX_ATTRIB_ARRAY2_NV 0x8652
-#define GL_VERTEX_ATTRIB_ARRAY3_NV 0x8653
-#define GL_VERTEX_ATTRIB_ARRAY4_NV 0x8654
-#define GL_VERTEX_ATTRIB_ARRAY5_NV 0x8655
-#define GL_VERTEX_ATTRIB_ARRAY6_NV 0x8656
-#define GL_VERTEX_ATTRIB_ARRAY7_NV 0x8657
-#define GL_VERTEX_ATTRIB_ARRAY8_NV 0x8658
-#define GL_VERTEX_ATTRIB_ARRAY9_NV 0x8659
-#define GL_VERTEX_ATTRIB_ARRAY10_NV 0x865A
-#define GL_VERTEX_ATTRIB_ARRAY11_NV 0x865B
-#define GL_VERTEX_ATTRIB_ARRAY12_NV 0x865C
-#define GL_VERTEX_ATTRIB_ARRAY13_NV 0x865D
-#define GL_VERTEX_ATTRIB_ARRAY14_NV 0x865E
-#define GL_VERTEX_ATTRIB_ARRAY15_NV 0x865F
-#define GL_MAP1_VERTEX_ATTRIB0_4_NV 0x8660
-#define GL_MAP1_VERTEX_ATTRIB1_4_NV 0x8661
-#define GL_MAP1_VERTEX_ATTRIB2_4_NV 0x8662
-#define GL_MAP1_VERTEX_ATTRIB3_4_NV 0x8663
-#define GL_MAP1_VERTEX_ATTRIB4_4_NV 0x8664
-#define GL_MAP1_VERTEX_ATTRIB5_4_NV 0x8665
-#define GL_MAP1_VERTEX_ATTRIB6_4_NV 0x8666
-#define GL_MAP1_VERTEX_ATTRIB7_4_NV 0x8667
-#define GL_MAP1_VERTEX_ATTRIB8_4_NV 0x8668
-#define GL_MAP1_VERTEX_ATTRIB9_4_NV 0x8669
-#define GL_MAP1_VERTEX_ATTRIB10_4_NV 0x866A
-#define GL_MAP1_VERTEX_ATTRIB11_4_NV 0x866B
-#define GL_MAP1_VERTEX_ATTRIB12_4_NV 0x866C
-#define GL_MAP1_VERTEX_ATTRIB13_4_NV 0x866D
-#define GL_MAP1_VERTEX_ATTRIB14_4_NV 0x866E
-#define GL_MAP1_VERTEX_ATTRIB15_4_NV 0x866F
-#define GL_MAP2_VERTEX_ATTRIB0_4_NV 0x8670
-#define GL_MAP2_VERTEX_ATTRIB1_4_NV 0x8671
-#define GL_MAP2_VERTEX_ATTRIB2_4_NV 0x8672
-#define GL_MAP2_VERTEX_ATTRIB3_4_NV 0x8673
-#define GL_MAP2_VERTEX_ATTRIB4_4_NV 0x8674
-#define GL_MAP2_VERTEX_ATTRIB5_4_NV 0x8675
-#define GL_MAP2_VERTEX_ATTRIB6_4_NV 0x8676
-#define GL_MAP2_VERTEX_ATTRIB7_4_NV 0x8677
-#define GL_MAP2_VERTEX_ATTRIB8_4_NV 0x8678
-#define GL_MAP2_VERTEX_ATTRIB9_4_NV 0x8679
-#define GL_MAP2_VERTEX_ATTRIB10_4_NV 0x867A
-#define GL_MAP2_VERTEX_ATTRIB11_4_NV 0x867B
-#define GL_MAP2_VERTEX_ATTRIB12_4_NV 0x867C
-#define GL_MAP2_VERTEX_ATTRIB13_4_NV 0x867D
-#define GL_MAP2_VERTEX_ATTRIB14_4_NV 0x867E
-#define GL_MAP2_VERTEX_ATTRIB15_4_NV 0x867F
-#endif
-
-#ifndef GL_SGIX_texture_coordinate_clamp
-#define GL_TEXTURE_MAX_CLAMP_S_SGIX 0x8369
-#define GL_TEXTURE_MAX_CLAMP_T_SGIX 0x836A
-#define GL_TEXTURE_MAX_CLAMP_R_SGIX 0x836B
-#endif
-
-#ifndef GL_SGIX_scalebias_hint
-#define GL_SCALEBIAS_HINT_SGIX 0x8322
-#endif
-
-#ifndef GL_OML_interlace
-#define GL_INTERLACE_OML 0x8980
-#define GL_INTERLACE_READ_OML 0x8981
-#endif
-
-#ifndef GL_OML_subsample
-#define GL_FORMAT_SUBSAMPLE_24_24_OML 0x8982
-#define GL_FORMAT_SUBSAMPLE_244_244_OML 0x8983
-#endif
-
-#ifndef GL_OML_resample
-#define GL_PACK_RESAMPLE_OML 0x8984
-#define GL_UNPACK_RESAMPLE_OML 0x8985
-#define GL_RESAMPLE_REPLICATE_OML 0x8986
-#define GL_RESAMPLE_ZERO_FILL_OML 0x8987
-#define GL_RESAMPLE_AVERAGE_OML 0x8988
-#define GL_RESAMPLE_DECIMATE_OML 0x8989
-#endif
-
-#ifndef GL_NV_copy_depth_to_color
-#define GL_DEPTH_STENCIL_TO_RGBA_NV 0x886E
-#define GL_DEPTH_STENCIL_TO_BGRA_NV 0x886F
-#endif
-
-#ifndef GL_ATI_envmap_bumpmap
-#define GL_BUMP_ROT_MATRIX_ATI 0x8775
-#define GL_BUMP_ROT_MATRIX_SIZE_ATI 0x8776
-#define GL_BUMP_NUM_TEX_UNITS_ATI 0x8777
-#define GL_BUMP_TEX_UNITS_ATI 0x8778
-#define GL_DUDV_ATI 0x8779
-#define GL_DU8DV8_ATI 0x877A
-#define GL_BUMP_ENVMAP_ATI 0x877B
-#define GL_BUMP_TARGET_ATI 0x877C
-#endif
-
-#ifndef GL_ATI_fragment_shader
-#define GL_FRAGMENT_SHADER_ATI 0x8920
-#define GL_REG_0_ATI 0x8921
-#define GL_REG_1_ATI 0x8922
-#define GL_REG_2_ATI 0x8923
-#define GL_REG_3_ATI 0x8924
-#define GL_REG_4_ATI 0x8925
-#define GL_REG_5_ATI 0x8926
-#define GL_REG_6_ATI 0x8927
-#define GL_REG_7_ATI 0x8928
-#define GL_REG_8_ATI 0x8929
-#define GL_REG_9_ATI 0x892A
-#define GL_REG_10_ATI 0x892B
-#define GL_REG_11_ATI 0x892C
-#define GL_REG_12_ATI 0x892D
-#define GL_REG_13_ATI 0x892E
-#define GL_REG_14_ATI 0x892F
-#define GL_REG_15_ATI 0x8930
-#define GL_REG_16_ATI 0x8931
-#define GL_REG_17_ATI 0x8932
-#define GL_REG_18_ATI 0x8933
-#define GL_REG_19_ATI 0x8934
-#define GL_REG_20_ATI 0x8935
-#define GL_REG_21_ATI 0x8936
-#define GL_REG_22_ATI 0x8937
-#define GL_REG_23_ATI 0x8938
-#define GL_REG_24_ATI 0x8939
-#define GL_REG_25_ATI 0x893A
-#define GL_REG_26_ATI 0x893B
-#define GL_REG_27_ATI 0x893C
-#define GL_REG_28_ATI 0x893D
-#define GL_REG_29_ATI 0x893E
-#define GL_REG_30_ATI 0x893F
-#define GL_REG_31_ATI 0x8940
-#define GL_CON_0_ATI 0x8941
-#define GL_CON_1_ATI 0x8942
-#define GL_CON_2_ATI 0x8943
-#define GL_CON_3_ATI 0x8944
-#define GL_CON_4_ATI 0x8945
-#define GL_CON_5_ATI 0x8946
-#define GL_CON_6_ATI 0x8947
-#define GL_CON_7_ATI 0x8948
-#define GL_CON_8_ATI 0x8949
-#define GL_CON_9_ATI 0x894A
-#define GL_CON_10_ATI 0x894B
-#define GL_CON_11_ATI 0x894C
-#define GL_CON_12_ATI 0x894D
-#define GL_CON_13_ATI 0x894E
-#define GL_CON_14_ATI 0x894F
-#define GL_CON_15_ATI 0x8950
-#define GL_CON_16_ATI 0x8951
-#define GL_CON_17_ATI 0x8952
-#define GL_CON_18_ATI 0x8953
-#define GL_CON_19_ATI 0x8954
-#define GL_CON_20_ATI 0x8955
-#define GL_CON_21_ATI 0x8956
-#define GL_CON_22_ATI 0x8957
-#define GL_CON_23_ATI 0x8958
-#define GL_CON_24_ATI 0x8959
-#define GL_CON_25_ATI 0x895A
-#define GL_CON_26_ATI 0x895B
-#define GL_CON_27_ATI 0x895C
-#define GL_CON_28_ATI 0x895D
-#define GL_CON_29_ATI 0x895E
-#define GL_CON_30_ATI 0x895F
-#define GL_CON_31_ATI 0x8960
-#define GL_MOV_ATI 0x8961
-#define GL_ADD_ATI 0x8963
-#define GL_MUL_ATI 0x8964
-#define GL_SUB_ATI 0x8965
-#define GL_DOT3_ATI 0x8966
-#define GL_DOT4_ATI 0x8967
-#define GL_MAD_ATI 0x8968
-#define GL_LERP_ATI 0x8969
-#define GL_CND_ATI 0x896A
-#define GL_CND0_ATI 0x896B
-#define GL_DOT2_ADD_ATI 0x896C
-#define GL_SECONDARY_INTERPOLATOR_ATI 0x896D
-#define GL_NUM_FRAGMENT_REGISTERS_ATI 0x896E
-#define GL_NUM_FRAGMENT_CONSTANTS_ATI 0x896F
-#define GL_NUM_PASSES_ATI 0x8970
-#define GL_NUM_INSTRUCTIONS_PER_PASS_ATI 0x8971
-#define GL_NUM_INSTRUCTIONS_TOTAL_ATI 0x8972
-#define GL_NUM_INPUT_INTERPOLATOR_COMPONENTS_ATI 0x8973
-#define GL_NUM_LOOPBACK_COMPONENTS_ATI 0x8974
-#define GL_COLOR_ALPHA_PAIRING_ATI 0x8975
-#define GL_SWIZZLE_STR_ATI 0x8976
-#define GL_SWIZZLE_STQ_ATI 0x8977
-#define GL_SWIZZLE_STR_DR_ATI 0x8978
-#define GL_SWIZZLE_STQ_DQ_ATI 0x8979
-#define GL_SWIZZLE_STRQ_ATI 0x897A
-#define GL_SWIZZLE_STRQ_DQ_ATI 0x897B
-#define GL_RED_BIT_ATI 0x00000001
-#define GL_GREEN_BIT_ATI 0x00000002
-#define GL_BLUE_BIT_ATI 0x00000004
-#define GL_2X_BIT_ATI 0x00000001
-#define GL_4X_BIT_ATI 0x00000002
-#define GL_8X_BIT_ATI 0x00000004
-#define GL_HALF_BIT_ATI 0x00000008
-#define GL_QUARTER_BIT_ATI 0x00000010
-#define GL_EIGHTH_BIT_ATI 0x00000020
-#define GL_SATURATE_BIT_ATI 0x00000040
-#define GL_COMP_BIT_ATI 0x00000002
-#define GL_NEGATE_BIT_ATI 0x00000004
-#define GL_BIAS_BIT_ATI 0x00000008
-#endif
-
-#ifndef GL_ATI_pn_triangles
-#define GL_PN_TRIANGLES_ATI 0x87F0
-#define GL_MAX_PN_TRIANGLES_TESSELATION_LEVEL_ATI 0x87F1
-#define GL_PN_TRIANGLES_POINT_MODE_ATI 0x87F2
-#define GL_PN_TRIANGLES_NORMAL_MODE_ATI 0x87F3
-#define GL_PN_TRIANGLES_TESSELATION_LEVEL_ATI 0x87F4
-#define GL_PN_TRIANGLES_POINT_MODE_LINEAR_ATI 0x87F5
-#define GL_PN_TRIANGLES_POINT_MODE_CUBIC_ATI 0x87F6
-#define GL_PN_TRIANGLES_NORMAL_MODE_LINEAR_ATI 0x87F7
-#define GL_PN_TRIANGLES_NORMAL_MODE_QUADRATIC_ATI 0x87F8
-#endif
-
-#ifndef GL_ATI_vertex_array_object
-#define GL_STATIC_ATI 0x8760
-#define GL_DYNAMIC_ATI 0x8761
-#define GL_PRESERVE_ATI 0x8762
-#define GL_DISCARD_ATI 0x8763
-#define GL_OBJECT_BUFFER_SIZE_ATI 0x8764
-#define GL_OBJECT_BUFFER_USAGE_ATI 0x8765
-#define GL_ARRAY_OBJECT_BUFFER_ATI 0x8766
-#define GL_ARRAY_OBJECT_OFFSET_ATI 0x8767
-#endif
-
-#ifndef GL_EXT_vertex_shader
-#define GL_VERTEX_SHADER_EXT 0x8780
-#define GL_VERTEX_SHADER_BINDING_EXT 0x8781
-#define GL_OP_INDEX_EXT 0x8782
-#define GL_OP_NEGATE_EXT 0x8783
-#define GL_OP_DOT3_EXT 0x8784
-#define GL_OP_DOT4_EXT 0x8785
-#define GL_OP_MUL_EXT 0x8786
-#define GL_OP_ADD_EXT 0x8787
-#define GL_OP_MADD_EXT 0x8788
-#define GL_OP_FRAC_EXT 0x8789
-#define GL_OP_MAX_EXT 0x878A
-#define GL_OP_MIN_EXT 0x878B
-#define GL_OP_SET_GE_EXT 0x878C
-#define GL_OP_SET_LT_EXT 0x878D
-#define GL_OP_CLAMP_EXT 0x878E
-#define GL_OP_FLOOR_EXT 0x878F
-#define GL_OP_ROUND_EXT 0x8790
-#define GL_OP_EXP_BASE_2_EXT 0x8791
-#define GL_OP_LOG_BASE_2_EXT 0x8792
-#define GL_OP_POWER_EXT 0x8793
-#define GL_OP_RECIP_EXT 0x8794
-#define GL_OP_RECIP_SQRT_EXT 0x8795
-#define GL_OP_SUB_EXT 0x8796
-#define GL_OP_CROSS_PRODUCT_EXT 0x8797
-#define GL_OP_MULTIPLY_MATRIX_EXT 0x8798
-#define GL_OP_MOV_EXT 0x8799
-#define GL_OUTPUT_VERTEX_EXT 0x879A
-#define GL_OUTPUT_COLOR0_EXT 0x879B
-#define GL_OUTPUT_COLOR1_EXT 0x879C
-#define GL_OUTPUT_TEXTURE_COORD0_EXT 0x879D
-#define GL_OUTPUT_TEXTURE_COORD1_EXT 0x879E
-#define GL_OUTPUT_TEXTURE_COORD2_EXT 0x879F
-#define GL_OUTPUT_TEXTURE_COORD3_EXT 0x87A0
-#define GL_OUTPUT_TEXTURE_COORD4_EXT 0x87A1
-#define GL_OUTPUT_TEXTURE_COORD5_EXT 0x87A2
-#define GL_OUTPUT_TEXTURE_COORD6_EXT 0x87A3
-#define GL_OUTPUT_TEXTURE_COORD7_EXT 0x87A4
-#define GL_OUTPUT_TEXTURE_COORD8_EXT 0x87A5
-#define GL_OUTPUT_TEXTURE_COORD9_EXT 0x87A6
-#define GL_OUTPUT_TEXTURE_COORD10_EXT 0x87A7
-#define GL_OUTPUT_TEXTURE_COORD11_EXT 0x87A8
-#define GL_OUTPUT_TEXTURE_COORD12_EXT 0x87A9
-#define GL_OUTPUT_TEXTURE_COORD13_EXT 0x87AA
-#define GL_OUTPUT_TEXTURE_COORD14_EXT 0x87AB
-#define GL_OUTPUT_TEXTURE_COORD15_EXT 0x87AC
-#define GL_OUTPUT_TEXTURE_COORD16_EXT 0x87AD
-#define GL_OUTPUT_TEXTURE_COORD17_EXT 0x87AE
-#define GL_OUTPUT_TEXTURE_COORD18_EXT 0x87AF
-#define GL_OUTPUT_TEXTURE_COORD19_EXT 0x87B0
-#define GL_OUTPUT_TEXTURE_COORD20_EXT 0x87B1
-#define GL_OUTPUT_TEXTURE_COORD21_EXT 0x87B2
-#define GL_OUTPUT_TEXTURE_COORD22_EXT 0x87B3
-#define GL_OUTPUT_TEXTURE_COORD23_EXT 0x87B4
-#define GL_OUTPUT_TEXTURE_COORD24_EXT 0x87B5
-#define GL_OUTPUT_TEXTURE_COORD25_EXT 0x87B6
-#define GL_OUTPUT_TEXTURE_COORD26_EXT 0x87B7
-#define GL_OUTPUT_TEXTURE_COORD27_EXT 0x87B8
-#define GL_OUTPUT_TEXTURE_COORD28_EXT 0x87B9
-#define GL_OUTPUT_TEXTURE_COORD29_EXT 0x87BA
-#define GL_OUTPUT_TEXTURE_COORD30_EXT 0x87BB
-#define GL_OUTPUT_TEXTURE_COORD31_EXT 0x87BC
-#define GL_OUTPUT_FOG_EXT 0x87BD
-#define GL_SCALAR_EXT 0x87BE
-#define GL_VECTOR_EXT 0x87BF
-#define GL_MATRIX_EXT 0x87C0
-#define GL_VARIANT_EXT 0x87C1
-#define GL_INVARIANT_EXT 0x87C2
-#define GL_LOCAL_CONSTANT_EXT 0x87C3
-#define GL_LOCAL_EXT 0x87C4
-#define GL_MAX_VERTEX_SHADER_INSTRUCTIONS_EXT 0x87C5
-#define GL_MAX_VERTEX_SHADER_VARIANTS_EXT 0x87C6
-#define GL_MAX_VERTEX_SHADER_INVARIANTS_EXT 0x87C7
-#define GL_MAX_VERTEX_SHADER_LOCAL_CONSTANTS_EXT 0x87C8
-#define GL_MAX_VERTEX_SHADER_LOCALS_EXT 0x87C9
-#define GL_MAX_OPTIMIZED_VERTEX_SHADER_INSTRUCTIONS_EXT 0x87CA
-#define GL_MAX_OPTIMIZED_VERTEX_SHADER_VARIANTS_EXT 0x87CB
-#define GL_MAX_OPTIMIZED_VERTEX_SHADER_LOCAL_CONSTANTS_EXT 0x87CC
-#define GL_MAX_OPTIMIZED_VERTEX_SHADER_INVARIANTS_EXT 0x87CD
-#define GL_MAX_OPTIMIZED_VERTEX_SHADER_LOCALS_EXT 0x87CE
-#define GL_VERTEX_SHADER_INSTRUCTIONS_EXT 0x87CF
-#define GL_VERTEX_SHADER_VARIANTS_EXT 0x87D0
-#define GL_VERTEX_SHADER_INVARIANTS_EXT 0x87D1
-#define GL_VERTEX_SHADER_LOCAL_CONSTANTS_EXT 0x87D2
-#define GL_VERTEX_SHADER_LOCALS_EXT 0x87D3
-#define GL_VERTEX_SHADER_OPTIMIZED_EXT 0x87D4
-#define GL_X_EXT 0x87D5
-#define GL_Y_EXT 0x87D6
-#define GL_Z_EXT 0x87D7
-#define GL_W_EXT 0x87D8
-#define GL_NEGATIVE_X_EXT 0x87D9
-#define GL_NEGATIVE_Y_EXT 0x87DA
-#define GL_NEGATIVE_Z_EXT 0x87DB
-#define GL_NEGATIVE_W_EXT 0x87DC
-#define GL_ZERO_EXT 0x87DD
-#define GL_ONE_EXT 0x87DE
-#define GL_NEGATIVE_ONE_EXT 0x87DF
-#define GL_NORMALIZED_RANGE_EXT 0x87E0
-#define GL_FULL_RANGE_EXT 0x87E1
-#define GL_CURRENT_VERTEX_EXT 0x87E2
-#define GL_MVP_MATRIX_EXT 0x87E3
-#define GL_VARIANT_VALUE_EXT 0x87E4
-#define GL_VARIANT_DATATYPE_EXT 0x87E5
-#define GL_VARIANT_ARRAY_STRIDE_EXT 0x87E6
-#define GL_VARIANT_ARRAY_TYPE_EXT 0x87E7
-#define GL_VARIANT_ARRAY_EXT 0x87E8
-#define GL_VARIANT_ARRAY_POINTER_EXT 0x87E9
-#define GL_INVARIANT_VALUE_EXT 0x87EA
-#define GL_INVARIANT_DATATYPE_EXT 0x87EB
-#define GL_LOCAL_CONSTANT_VALUE_EXT 0x87EC
-#define GL_LOCAL_CONSTANT_DATATYPE_EXT 0x87ED
-#endif
-
-#ifndef GL_ATI_vertex_streams
-#define GL_MAX_VERTEX_STREAMS_ATI 0x876B
-#define GL_VERTEX_STREAM0_ATI 0x876C
-#define GL_VERTEX_STREAM1_ATI 0x876D
-#define GL_VERTEX_STREAM2_ATI 0x876E
-#define GL_VERTEX_STREAM3_ATI 0x876F
-#define GL_VERTEX_STREAM4_ATI 0x8770
-#define GL_VERTEX_STREAM5_ATI 0x8771
-#define GL_VERTEX_STREAM6_ATI 0x8772
-#define GL_VERTEX_STREAM7_ATI 0x8773
-#define GL_VERTEX_SOURCE_ATI 0x8774
-#endif
-
-#ifndef GL_ATI_element_array
-#define GL_ELEMENT_ARRAY_ATI 0x8768
-#define GL_ELEMENT_ARRAY_TYPE_ATI 0x8769
-#define GL_ELEMENT_ARRAY_POINTER_ATI 0x876A
-#endif
-
-#ifndef GL_SUN_mesh_array
-#define GL_QUAD_MESH_SUN 0x8614
-#define GL_TRIANGLE_MESH_SUN 0x8615
-#endif
-
-#ifndef GL_SUN_slice_accum
-#define GL_SLICE_ACCUM_SUN 0x85CC
-#endif
-
-#ifndef GL_NV_multisample_filter_hint
-#define GL_MULTISAMPLE_FILTER_HINT_NV 0x8534
-#endif
-
-#ifndef GL_NV_depth_clamp
-#define GL_DEPTH_CLAMP_NV 0x864F
-#endif
-
-#ifndef GL_NV_occlusion_query
-#define GL_PIXEL_COUNTER_BITS_NV 0x8864
-#define GL_CURRENT_OCCLUSION_QUERY_ID_NV 0x8865
-#define GL_PIXEL_COUNT_NV 0x8866
-#define GL_PIXEL_COUNT_AVAILABLE_NV 0x8867
-#endif
-
-#ifndef GL_NV_point_sprite
-#define GL_POINT_SPRITE_NV 0x8861
-#define GL_COORD_REPLACE_NV 0x8862
-#define GL_POINT_SPRITE_R_MODE_NV 0x8863
-#endif
-
-#ifndef GL_NV_texture_shader3
-#define GL_OFFSET_PROJECTIVE_TEXTURE_2D_NV 0x8850
-#define GL_OFFSET_PROJECTIVE_TEXTURE_2D_SCALE_NV 0x8851
-#define GL_OFFSET_PROJECTIVE_TEXTURE_RECTANGLE_NV 0x8852
-#define GL_OFFSET_PROJECTIVE_TEXTURE_RECTANGLE_SCALE_NV 0x8853
-#define GL_OFFSET_HILO_TEXTURE_2D_NV 0x8854
-#define GL_OFFSET_HILO_TEXTURE_RECTANGLE_NV 0x8855
-#define GL_OFFSET_HILO_PROJECTIVE_TEXTURE_2D_NV 0x8856
-#define GL_OFFSET_HILO_PROJECTIVE_TEXTURE_RECTANGLE_NV 0x8857
-#define GL_DEPENDENT_HILO_TEXTURE_2D_NV 0x8858
-#define GL_DEPENDENT_RGB_TEXTURE_3D_NV 0x8859
-#define GL_DEPENDENT_RGB_TEXTURE_CUBE_MAP_NV 0x885A
-#define GL_DOT_PRODUCT_PASS_THROUGH_NV 0x885B
-#define GL_DOT_PRODUCT_TEXTURE_1D_NV 0x885C
-#define GL_DOT_PRODUCT_AFFINE_DEPTH_REPLACE_NV 0x885D
-#define GL_HILO8_NV 0x885E
-#define GL_SIGNED_HILO8_NV 0x885F
-#define GL_FORCE_BLUE_TO_ONE_NV 0x8860
-#endif
-
-#ifndef GL_NV_vertex_program1_1
-#endif
-
-#ifndef GL_EXT_shadow_funcs
-#endif
-
-#ifndef GL_EXT_stencil_two_side
-#define GL_STENCIL_TEST_TWO_SIDE_EXT 0x8910
-#define GL_ACTIVE_STENCIL_FACE_EXT 0x8911
-#endif
-
-#ifndef GL_ATI_text_fragment_shader
-#define GL_TEXT_FRAGMENT_SHADER_ATI 0x8200
-#endif
-
-#ifndef GL_APPLE_client_storage
-#define GL_UNPACK_CLIENT_STORAGE_APPLE 0x85B2
-#endif
-
-#ifndef GL_APPLE_element_array
-#define GL_ELEMENT_ARRAY_APPLE 0x8A0C
-#define GL_ELEMENT_ARRAY_TYPE_APPLE 0x8A0D
-#define GL_ELEMENT_ARRAY_POINTER_APPLE 0x8A0E
-#endif
-
-#ifndef GL_APPLE_fence
-#define GL_DRAW_PIXELS_APPLE 0x8A0A
-#define GL_FENCE_APPLE 0x8A0B
-#endif
-
-#ifndef GL_APPLE_vertex_array_object
-#define GL_VERTEX_ARRAY_BINDING_APPLE 0x85B5
-#endif
-
-#ifndef GL_APPLE_vertex_array_range
-#define GL_VERTEX_ARRAY_RANGE_APPLE 0x851D
-#define GL_VERTEX_ARRAY_RANGE_LENGTH_APPLE 0x851E
-#define GL_VERTEX_ARRAY_STORAGE_HINT_APPLE 0x851F
-#define GL_VERTEX_ARRAY_RANGE_POINTER_APPLE 0x8521
-#define GL_STORAGE_CLIENT_APPLE 0x85B4
-#define GL_STORAGE_CACHED_APPLE 0x85BE
-#define GL_STORAGE_SHARED_APPLE 0x85BF
-#endif
-
-#ifndef GL_APPLE_ycbcr_422
-#define GL_YCBCR_422_APPLE 0x85B9
-#define GL_UNSIGNED_SHORT_8_8_APPLE 0x85BA
-#define GL_UNSIGNED_SHORT_8_8_REV_APPLE 0x85BB
-#endif
-
-#ifndef GL_S3_s3tc
-#define GL_RGB_S3TC 0x83A0
-#define GL_RGB4_S3TC 0x83A1
-#define GL_RGBA_S3TC 0x83A2
-#define GL_RGBA4_S3TC 0x83A3
-#endif
-
-#ifndef GL_ATI_draw_buffers
-#define GL_MAX_DRAW_BUFFERS_ATI 0x8824
-#define GL_DRAW_BUFFER0_ATI 0x8825
-#define GL_DRAW_BUFFER1_ATI 0x8826
-#define GL_DRAW_BUFFER2_ATI 0x8827
-#define GL_DRAW_BUFFER3_ATI 0x8828
-#define GL_DRAW_BUFFER4_ATI 0x8829
-#define GL_DRAW_BUFFER5_ATI 0x882A
-#define GL_DRAW_BUFFER6_ATI 0x882B
-#define GL_DRAW_BUFFER7_ATI 0x882C
-#define GL_DRAW_BUFFER8_ATI 0x882D
-#define GL_DRAW_BUFFER9_ATI 0x882E
-#define GL_DRAW_BUFFER10_ATI 0x882F
-#define GL_DRAW_BUFFER11_ATI 0x8830
-#define GL_DRAW_BUFFER12_ATI 0x8831
-#define GL_DRAW_BUFFER13_ATI 0x8832
-#define GL_DRAW_BUFFER14_ATI 0x8833
-#define GL_DRAW_BUFFER15_ATI 0x8834
-#endif
-
-#ifndef GL_ATI_pixel_format_float
-#define GL_TYPE_RGBA_FLOAT_ATI 0x8820
-#define GL_COLOR_CLEAR_UNCLAMPED_VALUE_ATI 0x8835
-#endif
-
-#ifndef GL_ATI_texture_env_combine3
-#define GL_MODULATE_ADD_ATI 0x8744
-#define GL_MODULATE_SIGNED_ADD_ATI 0x8745
-#define GL_MODULATE_SUBTRACT_ATI 0x8746
-#endif
-
-#ifndef GL_ATI_texture_float
-#define GL_RGBA_FLOAT32_ATI 0x8814
-#define GL_RGB_FLOAT32_ATI 0x8815
-#define GL_ALPHA_FLOAT32_ATI 0x8816
-#define GL_INTENSITY_FLOAT32_ATI 0x8817
-#define GL_LUMINANCE_FLOAT32_ATI 0x8818
-#define GL_LUMINANCE_ALPHA_FLOAT32_ATI 0x8819
-#define GL_RGBA_FLOAT16_ATI 0x881A
-#define GL_RGB_FLOAT16_ATI 0x881B
-#define GL_ALPHA_FLOAT16_ATI 0x881C
-#define GL_INTENSITY_FLOAT16_ATI 0x881D
-#define GL_LUMINANCE_FLOAT16_ATI 0x881E
-#define GL_LUMINANCE_ALPHA_FLOAT16_ATI 0x881F
-#endif
-
-#ifndef GL_NV_float_buffer
-#define GL_FLOAT_R_NV 0x8880
-#define GL_FLOAT_RG_NV 0x8881
-#define GL_FLOAT_RGB_NV 0x8882
-#define GL_FLOAT_RGBA_NV 0x8883
-#define GL_FLOAT_R16_NV 0x8884
-#define GL_FLOAT_R32_NV 0x8885
-#define GL_FLOAT_RG16_NV 0x8886
-#define GL_FLOAT_RG32_NV 0x8887
-#define GL_FLOAT_RGB16_NV 0x8888
-#define GL_FLOAT_RGB32_NV 0x8889
-#define GL_FLOAT_RGBA16_NV 0x888A
-#define GL_FLOAT_RGBA32_NV 0x888B
-#define GL_TEXTURE_FLOAT_COMPONENTS_NV 0x888C
-#define GL_FLOAT_CLEAR_COLOR_VALUE_NV 0x888D
-#define GL_FLOAT_RGBA_MODE_NV 0x888E
-#endif
-
-#ifndef GL_NV_fragment_program
-#define GL_MAX_FRAGMENT_PROGRAM_LOCAL_PARAMETERS_NV 0x8868
-#define GL_FRAGMENT_PROGRAM_NV 0x8870
-#define GL_MAX_TEXTURE_COORDS_NV 0x8871
-#define GL_MAX_TEXTURE_IMAGE_UNITS_NV 0x8872
-#define GL_FRAGMENT_PROGRAM_BINDING_NV 0x8873
-#define GL_PROGRAM_ERROR_STRING_NV 0x8874
-#endif
-
-#ifndef GL_NV_half_float
-#define GL_HALF_FLOAT_NV 0x140B
-#endif
-
-#ifndef GL_NV_pixel_data_range
-#define GL_WRITE_PIXEL_DATA_RANGE_NV 0x8878
-#define GL_READ_PIXEL_DATA_RANGE_NV 0x8879
-#define GL_WRITE_PIXEL_DATA_RANGE_LENGTH_NV 0x887A
-#define GL_READ_PIXEL_DATA_RANGE_LENGTH_NV 0x887B
-#define GL_WRITE_PIXEL_DATA_RANGE_POINTER_NV 0x887C
-#define GL_READ_PIXEL_DATA_RANGE_POINTER_NV 0x887D
-#endif
-
-#ifndef GL_NV_primitive_restart
-#define GL_PRIMITIVE_RESTART_NV 0x8558
-#define GL_PRIMITIVE_RESTART_INDEX_NV 0x8559
-#endif
-
-#ifndef GL_NV_texture_expand_normal
-#define GL_TEXTURE_UNSIGNED_REMAP_MODE_NV 0x888F
-#endif
-
-#ifndef GL_NV_vertex_program2
-#endif
-
-#ifndef GL_ATI_map_object_buffer
-#endif
-
-#ifndef GL_ATI_separate_stencil
-#define GL_STENCIL_BACK_FUNC_ATI 0x8800
-#define GL_STENCIL_BACK_FAIL_ATI 0x8801
-#define GL_STENCIL_BACK_PASS_DEPTH_FAIL_ATI 0x8802
-#define GL_STENCIL_BACK_PASS_DEPTH_PASS_ATI 0x8803
-#endif
-
-#ifndef GL_ATI_vertex_attrib_array_object
-#endif
-
-#ifndef GL_OES_read_format
-#define GL_IMPLEMENTATION_COLOR_READ_TYPE_OES 0x8B9A
-#define GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES 0x8B9B
-#endif
-
-#ifndef GL_EXT_depth_bounds_test
-#define GL_DEPTH_BOUNDS_TEST_EXT 0x8890
-#define GL_DEPTH_BOUNDS_EXT 0x8891
-#endif
-
-#ifndef GL_EXT_texture_mirror_clamp
-#define GL_MIRROR_CLAMP_EXT 0x8742
-#define GL_MIRROR_CLAMP_TO_EDGE_EXT 0x8743
-#define GL_MIRROR_CLAMP_TO_BORDER_EXT 0x8912
-#endif
-
-#ifndef GL_EXT_blend_equation_separate
-#define GL_BLEND_EQUATION_RGB_EXT 0x8009
-#define GL_BLEND_EQUATION_ALPHA_EXT 0x883D
-#endif
-
-#ifndef GL_MESA_pack_invert
-#define GL_PACK_INVERT_MESA 0x8758
-#endif
-
-#ifndef GL_MESA_ycbcr_texture
-#define GL_UNSIGNED_SHORT_8_8_MESA 0x85BA
-#define GL_UNSIGNED_SHORT_8_8_REV_MESA 0x85BB
-#define GL_YCBCR_MESA 0x8757
-#endif
-
-#ifndef GL_EXT_pixel_buffer_object
-#define GL_PIXEL_PACK_BUFFER_EXT 0x88EB
-#define GL_PIXEL_UNPACK_BUFFER_EXT 0x88EC
-#define GL_PIXEL_PACK_BUFFER_BINDING_EXT 0x88ED
-#define GL_PIXEL_UNPACK_BUFFER_BINDING_EXT 0x88EF
-#endif
-
-#ifndef GL_NV_fragment_program_option
-#endif
-
-#ifndef GL_NV_fragment_program2
-#define GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV 0x88F4
-#define GL_MAX_PROGRAM_CALL_DEPTH_NV 0x88F5
-#define GL_MAX_PROGRAM_IF_DEPTH_NV 0x88F6
-#define GL_MAX_PROGRAM_LOOP_DEPTH_NV 0x88F7
-#define GL_MAX_PROGRAM_LOOP_COUNT_NV 0x88F8
-#endif
-
-#ifndef GL_NV_vertex_program2_option
-/* reuse GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV */
-/* reuse GL_MAX_PROGRAM_CALL_DEPTH_NV */
-#endif
-
-#ifndef GL_NV_vertex_program3
-/* reuse GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB */
-#endif
-
-#ifndef GL_EXT_framebuffer_object
-#define GL_INVALID_FRAMEBUFFER_OPERATION_EXT 0x0506
-#define GL_MAX_RENDERBUFFER_SIZE_EXT 0x84E8
-#define GL_FRAMEBUFFER_BINDING_EXT 0x8CA6
-#define GL_RENDERBUFFER_BINDING_EXT 0x8CA7
-#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT 0x8CD0
-#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT 0x8CD1
-#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT 0x8CD2
-#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT 0x8CD3
-#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT 0x8CD4
-#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
-#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT 0x8CD6
-#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT 0x8CD7
-#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT 0x8CD9
-#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT 0x8CDA
-#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT 0x8CDB
-#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT 0x8CDC
-#define GL_FRAMEBUFFER_UNSUPPORTED_EXT 0x8CDD
-#define GL_MAX_COLOR_ATTACHMENTS_EXT 0x8CDF
-#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
-#define GL_COLOR_ATTACHMENT1_EXT 0x8CE1
-#define GL_COLOR_ATTACHMENT2_EXT 0x8CE2
-#define GL_COLOR_ATTACHMENT3_EXT 0x8CE3
-#define GL_COLOR_ATTACHMENT4_EXT 0x8CE4
-#define GL_COLOR_ATTACHMENT5_EXT 0x8CE5
-#define GL_COLOR_ATTACHMENT6_EXT 0x8CE6
-#define GL_COLOR_ATTACHMENT7_EXT 0x8CE7
-#define GL_COLOR_ATTACHMENT8_EXT 0x8CE8
-#define GL_COLOR_ATTACHMENT9_EXT 0x8CE9
-#define GL_COLOR_ATTACHMENT10_EXT 0x8CEA
-#define GL_COLOR_ATTACHMENT11_EXT 0x8CEB
-#define GL_COLOR_ATTACHMENT12_EXT 0x8CEC
-#define GL_COLOR_ATTACHMENT13_EXT 0x8CED
-#define GL_COLOR_ATTACHMENT14_EXT 0x8CEE
-#define GL_COLOR_ATTACHMENT15_EXT 0x8CEF
-#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
-#define GL_STENCIL_ATTACHMENT_EXT 0x8D20
-#define GL_FRAMEBUFFER_EXT 0x8D40
-#define GL_RENDERBUFFER_EXT 0x8D41
-#define GL_RENDERBUFFER_WIDTH_EXT 0x8D42
-#define GL_RENDERBUFFER_HEIGHT_EXT 0x8D43
-#define GL_RENDERBUFFER_INTERNAL_FORMAT_EXT 0x8D44
-#define GL_STENCIL_INDEX1_EXT 0x8D46
-#define GL_STENCIL_INDEX4_EXT 0x8D47
-#define GL_STENCIL_INDEX8_EXT 0x8D48
-#define GL_STENCIL_INDEX16_EXT 0x8D49
-#define GL_RENDERBUFFER_RED_SIZE_EXT 0x8D50
-#define GL_RENDERBUFFER_GREEN_SIZE_EXT 0x8D51
-#define GL_RENDERBUFFER_BLUE_SIZE_EXT 0x8D52
-#define GL_RENDERBUFFER_ALPHA_SIZE_EXT 0x8D53
-#define GL_RENDERBUFFER_DEPTH_SIZE_EXT 0x8D54
-#define GL_RENDERBUFFER_STENCIL_SIZE_EXT 0x8D55
-#endif
-
-#ifndef GL_GREMEDY_string_marker
-#endif
-
-#ifndef GL_EXT_packed_depth_stencil
-#define GL_DEPTH_STENCIL_EXT 0x84F9
-#define GL_UNSIGNED_INT_24_8_EXT 0x84FA
-#define GL_DEPTH24_STENCIL8_EXT 0x88F0
-#define GL_TEXTURE_STENCIL_SIZE_EXT 0x88F1
-#endif
-
-#ifndef GL_EXT_stencil_clear_tag
-#define GL_STENCIL_TAG_BITS_EXT 0x88F2
-#define GL_STENCIL_CLEAR_TAG_VALUE_EXT 0x88F3
-#endif
-
-#ifndef GL_EXT_texture_sRGB
-#define GL_SRGB_EXT 0x8C40
-#define GL_SRGB8_EXT 0x8C41
-#define GL_SRGB_ALPHA_EXT 0x8C42
-#define GL_SRGB8_ALPHA8_EXT 0x8C43
-#define GL_SLUMINANCE_ALPHA_EXT 0x8C44
-#define GL_SLUMINANCE8_ALPHA8_EXT 0x8C45
-#define GL_SLUMINANCE_EXT 0x8C46
-#define GL_SLUMINANCE8_EXT 0x8C47
-#define GL_COMPRESSED_SRGB_EXT 0x8C48
-#define GL_COMPRESSED_SRGB_ALPHA_EXT 0x8C49
-#define GL_COMPRESSED_SLUMINANCE_EXT 0x8C4A
-#define GL_COMPRESSED_SLUMINANCE_ALPHA_EXT 0x8C4B
-#define GL_COMPRESSED_SRGB_S3TC_DXT1_EXT 0x8C4C
-#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT 0x8C4D
-#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT 0x8C4E
-#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT 0x8C4F
-#endif
-
-#ifndef GL_EXT_framebuffer_blit
-#define GL_READ_FRAMEBUFFER_EXT 0x8CA8
-#define GL_DRAW_FRAMEBUFFER_EXT 0x8CA9
-#define GL_DRAW_FRAMEBUFFER_BINDING_EXT GL_FRAMEBUFFER_BINDING_EXT
-#define GL_READ_FRAMEBUFFER_BINDING_EXT 0x8CAA
-#endif
-
-#ifndef GL_EXT_framebuffer_multisample
-#define GL_RENDERBUFFER_SAMPLES_EXT 0x8CAB
-#define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT 0x8D56
-#define GL_MAX_SAMPLES_EXT 0x8D57
-#endif
-
-#ifndef GL_MESAX_texture_stack
-#define GL_TEXTURE_1D_STACK_MESAX 0x8759
-#define GL_TEXTURE_2D_STACK_MESAX 0x875A
-#define GL_PROXY_TEXTURE_1D_STACK_MESAX 0x875B
-#define GL_PROXY_TEXTURE_2D_STACK_MESAX 0x875C
-#define GL_TEXTURE_1D_STACK_BINDING_MESAX 0x875D
-#define GL_TEXTURE_2D_STACK_BINDING_MESAX 0x875E
-#endif
-
-#ifndef GL_EXT_timer_query
-#define GL_TIME_ELAPSED_EXT 0x88BF
-#endif
-
-#ifndef GL_EXT_gpu_program_parameters
-#endif
-
-#ifndef GL_APPLE_flush_buffer_range
-#define GL_BUFFER_SERIALIZED_MODIFY_APPLE 0x8A12
-#define GL_BUFFER_FLUSHING_UNMAP_APPLE 0x8A13
-#endif
-
-#ifndef GL_NV_gpu_program4
-#define GL_MIN_PROGRAM_TEXEL_OFFSET_NV 0x8904
-#define GL_MAX_PROGRAM_TEXEL_OFFSET_NV 0x8905
-#define GL_PROGRAM_ATTRIB_COMPONENTS_NV 0x8906
-#define GL_PROGRAM_RESULT_COMPONENTS_NV 0x8907
-#define GL_MAX_PROGRAM_ATTRIB_COMPONENTS_NV 0x8908
-#define GL_MAX_PROGRAM_RESULT_COMPONENTS_NV 0x8909
-#define GL_MAX_PROGRAM_GENERIC_ATTRIBS_NV 0x8DA5
-#define GL_MAX_PROGRAM_GENERIC_RESULTS_NV 0x8DA6
-#endif
-
-#ifndef GL_NV_geometry_program4
-#define GL_LINES_ADJACENCY_EXT 0x000A
-#define GL_LINE_STRIP_ADJACENCY_EXT 0x000B
-#define GL_TRIANGLES_ADJACENCY_EXT 0x000C
-#define GL_TRIANGLE_STRIP_ADJACENCY_EXT 0x000D
-#define GL_GEOMETRY_PROGRAM_NV 0x8C26
-#define GL_MAX_PROGRAM_OUTPUT_VERTICES_NV 0x8C27
-#define GL_MAX_PROGRAM_TOTAL_OUTPUT_COMPONENTS_NV 0x8C28
-#define GL_GEOMETRY_VERTICES_OUT_EXT 0x8DDA
-#define GL_GEOMETRY_INPUT_TYPE_EXT 0x8DDB
-#define GL_GEOMETRY_OUTPUT_TYPE_EXT 0x8DDC
-#define GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_EXT 0x8C29
-#define GL_FRAMEBUFFER_ATTACHMENT_LAYERED_EXT 0x8DA7
-#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_EXT 0x8DA8
-#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_EXT 0x8DA9
-#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT 0x8CD4
-#define GL_PROGRAM_POINT_SIZE_EXT 0x8642
-#endif
-
-#ifndef GL_EXT_geometry_shader4
-#define GL_GEOMETRY_SHADER_EXT 0x8DD9
-/* reuse GL_GEOMETRY_VERTICES_OUT_EXT */
-/* reuse GL_GEOMETRY_INPUT_TYPE_EXT */
-/* reuse GL_GEOMETRY_OUTPUT_TYPE_EXT */
-/* reuse GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_EXT */
-#define GL_MAX_GEOMETRY_VARYING_COMPONENTS_EXT 0x8DDD
-#define GL_MAX_VERTEX_VARYING_COMPONENTS_EXT 0x8DDE
-#define GL_MAX_VARYING_COMPONENTS_EXT 0x8B4B
-#define GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_EXT 0x8DDF
-#define GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT 0x8DE0
-#define GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_EXT 0x8DE1
-/* reuse GL_LINES_ADJACENCY_EXT */
-/* reuse GL_LINE_STRIP_ADJACENCY_EXT */
-/* reuse GL_TRIANGLES_ADJACENCY_EXT */
-/* reuse GL_TRIANGLE_STRIP_ADJACENCY_EXT */
-/* reuse GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_EXT */
-/* reuse GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_EXT */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_LAYERED_EXT */
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT */
-/* reuse GL_PROGRAM_POINT_SIZE_EXT */
-#endif
-
-#ifndef GL_NV_vertex_program4
-#define GL_VERTEX_ATTRIB_ARRAY_INTEGER_NV 0x88FD
-#endif
-
-#ifndef GL_EXT_gpu_shader4
-#define GL_SAMPLER_1D_ARRAY_EXT 0x8DC0
-#define GL_SAMPLER_2D_ARRAY_EXT 0x8DC1
-#define GL_SAMPLER_BUFFER_EXT 0x8DC2
-#define GL_SAMPLER_1D_ARRAY_SHADOW_EXT 0x8DC3
-#define GL_SAMPLER_2D_ARRAY_SHADOW_EXT 0x8DC4
-#define GL_SAMPLER_CUBE_SHADOW_EXT 0x8DC5
-#define GL_UNSIGNED_INT_VEC2_EXT 0x8DC6
-#define GL_UNSIGNED_INT_VEC3_EXT 0x8DC7
-#define GL_UNSIGNED_INT_VEC4_EXT 0x8DC8
-#define GL_INT_SAMPLER_1D_EXT 0x8DC9
-#define GL_INT_SAMPLER_2D_EXT 0x8DCA
-#define GL_INT_SAMPLER_3D_EXT 0x8DCB
-#define GL_INT_SAMPLER_CUBE_EXT 0x8DCC
-#define GL_INT_SAMPLER_2D_RECT_EXT 0x8DCD
-#define GL_INT_SAMPLER_1D_ARRAY_EXT 0x8DCE
-#define GL_INT_SAMPLER_2D_ARRAY_EXT 0x8DCF
-#define GL_INT_SAMPLER_BUFFER_EXT 0x8DD0
-#define GL_UNSIGNED_INT_SAMPLER_1D_EXT 0x8DD1
-#define GL_UNSIGNED_INT_SAMPLER_2D_EXT 0x8DD2
-#define GL_UNSIGNED_INT_SAMPLER_3D_EXT 0x8DD3
-#define GL_UNSIGNED_INT_SAMPLER_CUBE_EXT 0x8DD4
-#define GL_UNSIGNED_INT_SAMPLER_2D_RECT_EXT 0x8DD5
-#define GL_UNSIGNED_INT_SAMPLER_1D_ARRAY_EXT 0x8DD6
-#define GL_UNSIGNED_INT_SAMPLER_2D_ARRAY_EXT 0x8DD7
-#define GL_UNSIGNED_INT_SAMPLER_BUFFER_EXT 0x8DD8
-#endif
-
-#ifndef GL_EXT_draw_instanced
-#endif
-
-#ifndef GL_EXT_packed_float
-#define GL_R11F_G11F_B10F_EXT 0x8C3A
-#define GL_UNSIGNED_INT_10F_11F_11F_REV_EXT 0x8C3B
-#define GL_RGBA_SIGNED_COMPONENTS_EXT 0x8C3C
-#endif
-
-#ifndef GL_EXT_texture_array
-#define GL_TEXTURE_1D_ARRAY_EXT 0x8C18
-#define GL_PROXY_TEXTURE_1D_ARRAY_EXT 0x8C19
-#define GL_TEXTURE_2D_ARRAY_EXT 0x8C1A
-#define GL_PROXY_TEXTURE_2D_ARRAY_EXT 0x8C1B
-#define GL_TEXTURE_BINDING_1D_ARRAY_EXT 0x8C1C
-#define GL_TEXTURE_BINDING_2D_ARRAY_EXT 0x8C1D
-#define GL_MAX_ARRAY_TEXTURE_LAYERS_EXT 0x88FF
-#define GL_COMPARE_REF_DEPTH_TO_TEXTURE_EXT 0x884E
-/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT */
-#endif
-
-#ifndef GL_EXT_texture_buffer_object
-#define GL_TEXTURE_BUFFER_EXT 0x8C2A
-#define GL_MAX_TEXTURE_BUFFER_SIZE_EXT 0x8C2B
-#define GL_TEXTURE_BINDING_BUFFER_EXT 0x8C2C
-#define GL_TEXTURE_BUFFER_DATA_STORE_BINDING_EXT 0x8C2D
-#define GL_TEXTURE_BUFFER_FORMAT_EXT 0x8C2E
-#endif
-
-#ifndef GL_EXT_texture_compression_latc
-#define GL_COMPRESSED_LUMINANCE_LATC1_EXT 0x8C70
-#define GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT 0x8C71
-#define GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT 0x8C72
-#define GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT 0x8C73
-#endif
-
-#ifndef GL_EXT_texture_compression_rgtc
-#define GL_COMPRESSED_RED_RGTC1_EXT 0x8DBB
-#define GL_COMPRESSED_SIGNED_RED_RGTC1_EXT 0x8DBC
-#define GL_COMPRESSED_RED_GREEN_RGTC2_EXT 0x8DBD
-#define GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT 0x8DBE
-#endif
-
-#ifndef GL_EXT_texture_shared_exponent
-#define GL_RGB9_E5_EXT 0x8C3D
-#define GL_UNSIGNED_INT_5_9_9_9_REV_EXT 0x8C3E
-#define GL_TEXTURE_SHARED_SIZE_EXT 0x8C3F
-#endif
-
-#ifndef GL_NV_depth_buffer_float
-#define GL_DEPTH_COMPONENT32F_NV 0x8DAB
-#define GL_DEPTH32F_STENCIL8_NV 0x8DAC
-#define GL_FLOAT_32_UNSIGNED_INT_24_8_REV_NV 0x8DAD
-#define GL_DEPTH_BUFFER_FLOAT_MODE_NV 0x8DAF
-#endif
-
-#ifndef GL_NV_fragment_program4
-#endif
-
-#ifndef GL_NV_framebuffer_multisample_coverage
-#define GL_RENDERBUFFER_COVERAGE_SAMPLES_NV 0x8CAB
-#define GL_RENDERBUFFER_COLOR_SAMPLES_NV 0x8E10
-#define GL_MAX_MULTISAMPLE_COVERAGE_MODES_NV 0x8E11
-#define GL_MULTISAMPLE_COVERAGE_MODES_NV 0x8E12
-#endif
-
-#ifndef GL_EXT_framebuffer_sRGB
-#define GL_FRAMEBUFFER_SRGB_EXT 0x8DB9
-#define GL_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x8DBA
-#endif
-
-#ifndef GL_NV_geometry_shader4
-#endif
-
-#ifndef GL_NV_parameter_buffer_object
-#define GL_MAX_PROGRAM_PARAMETER_BUFFER_BINDINGS_NV 0x8DA0
-#define GL_MAX_PROGRAM_PARAMETER_BUFFER_SIZE_NV 0x8DA1
-#define GL_VERTEX_PROGRAM_PARAMETER_BUFFER_NV 0x8DA2
-#define GL_GEOMETRY_PROGRAM_PARAMETER_BUFFER_NV 0x8DA3
-#define GL_FRAGMENT_PROGRAM_PARAMETER_BUFFER_NV 0x8DA4
-#endif
-
-#ifndef GL_EXT_draw_buffers2
-#endif
-
-#ifndef GL_NV_transform_feedback
-#define GL_BACK_PRIMARY_COLOR_NV 0x8C77
-#define GL_BACK_SECONDARY_COLOR_NV 0x8C78
-#define GL_TEXTURE_COORD_NV 0x8C79
-#define GL_CLIP_DISTANCE_NV 0x8C7A
-#define GL_VERTEX_ID_NV 0x8C7B
-#define GL_PRIMITIVE_ID_NV 0x8C7C
-#define GL_GENERIC_ATTRIB_NV 0x8C7D
-#define GL_TRANSFORM_FEEDBACK_ATTRIBS_NV 0x8C7E
-#define GL_TRANSFORM_FEEDBACK_BUFFER_MODE_NV 0x8C7F
-#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_NV 0x8C80
-#define GL_ACTIVE_VARYINGS_NV 0x8C81
-#define GL_ACTIVE_VARYING_MAX_LENGTH_NV 0x8C82
-#define GL_TRANSFORM_FEEDBACK_VARYINGS_NV 0x8C83
-#define GL_TRANSFORM_FEEDBACK_BUFFER_START_NV 0x8C84
-#define GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_NV 0x8C85
-#define GL_TRANSFORM_FEEDBACK_RECORD_NV 0x8C86
-#define GL_PRIMITIVES_GENERATED_NV 0x8C87
-#define GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_NV 0x8C88
-#define GL_RASTERIZER_DISCARD_NV 0x8C89
-#define GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_ATTRIBS_NV 0x8C8A
-#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_NV 0x8C8B
-#define GL_INTERLEAVED_ATTRIBS_NV 0x8C8C
-#define GL_SEPARATE_ATTRIBS_NV 0x8C8D
-#define GL_TRANSFORM_FEEDBACK_BUFFER_NV 0x8C8E
-#define GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_NV 0x8C8F
-#define GL_LAYER_NV 0x8DAA
-#define GL_NEXT_BUFFER_NV -2
-#define GL_SKIP_COMPONENTS4_NV -3
-#define GL_SKIP_COMPONENTS3_NV -4
-#define GL_SKIP_COMPONENTS2_NV -5
-#define GL_SKIP_COMPONENTS1_NV -6
-#endif
-
-#ifndef GL_EXT_bindable_uniform
-#define GL_MAX_VERTEX_BINDABLE_UNIFORMS_EXT 0x8DE2
-#define GL_MAX_FRAGMENT_BINDABLE_UNIFORMS_EXT 0x8DE3
-#define GL_MAX_GEOMETRY_BINDABLE_UNIFORMS_EXT 0x8DE4
-#define GL_MAX_BINDABLE_UNIFORM_SIZE_EXT 0x8DED
-#define GL_UNIFORM_BUFFER_EXT 0x8DEE
-#define GL_UNIFORM_BUFFER_BINDING_EXT 0x8DEF
-#endif
-
-#ifndef GL_EXT_texture_integer
-#define GL_RGBA32UI_EXT 0x8D70
-#define GL_RGB32UI_EXT 0x8D71
-#define GL_ALPHA32UI_EXT 0x8D72
-#define GL_INTENSITY32UI_EXT 0x8D73
-#define GL_LUMINANCE32UI_EXT 0x8D74
-#define GL_LUMINANCE_ALPHA32UI_EXT 0x8D75
-#define GL_RGBA16UI_EXT 0x8D76
-#define GL_RGB16UI_EXT 0x8D77
-#define GL_ALPHA16UI_EXT 0x8D78
-#define GL_INTENSITY16UI_EXT 0x8D79
-#define GL_LUMINANCE16UI_EXT 0x8D7A
-#define GL_LUMINANCE_ALPHA16UI_EXT 0x8D7B
-#define GL_RGBA8UI_EXT 0x8D7C
-#define GL_RGB8UI_EXT 0x8D7D
-#define GL_ALPHA8UI_EXT 0x8D7E
-#define GL_INTENSITY8UI_EXT 0x8D7F
-#define GL_LUMINANCE8UI_EXT 0x8D80
-#define GL_LUMINANCE_ALPHA8UI_EXT 0x8D81
-#define GL_RGBA32I_EXT 0x8D82
-#define GL_RGB32I_EXT 0x8D83
-#define GL_ALPHA32I_EXT 0x8D84
-#define GL_INTENSITY32I_EXT 0x8D85
-#define GL_LUMINANCE32I_EXT 0x8D86
-#define GL_LUMINANCE_ALPHA32I_EXT 0x8D87
-#define GL_RGBA16I_EXT 0x8D88
-#define GL_RGB16I_EXT 0x8D89
-#define GL_ALPHA16I_EXT 0x8D8A
-#define GL_INTENSITY16I_EXT 0x8D8B
-#define GL_LUMINANCE16I_EXT 0x8D8C
-#define GL_LUMINANCE_ALPHA16I_EXT 0x8D8D
-#define GL_RGBA8I_EXT 0x8D8E
-#define GL_RGB8I_EXT 0x8D8F
-#define GL_ALPHA8I_EXT 0x8D90
-#define GL_INTENSITY8I_EXT 0x8D91
-#define GL_LUMINANCE8I_EXT 0x8D92
-#define GL_LUMINANCE_ALPHA8I_EXT 0x8D93
-#define GL_RED_INTEGER_EXT 0x8D94
-#define GL_GREEN_INTEGER_EXT 0x8D95
-#define GL_BLUE_INTEGER_EXT 0x8D96
-#define GL_ALPHA_INTEGER_EXT 0x8D97
-#define GL_RGB_INTEGER_EXT 0x8D98
-#define GL_RGBA_INTEGER_EXT 0x8D99
-#define GL_BGR_INTEGER_EXT 0x8D9A
-#define GL_BGRA_INTEGER_EXT 0x8D9B
-#define GL_LUMINANCE_INTEGER_EXT 0x8D9C
-#define GL_LUMINANCE_ALPHA_INTEGER_EXT 0x8D9D
-#define GL_RGBA_INTEGER_MODE_EXT 0x8D9E
-#endif
-
-#ifndef GL_GREMEDY_frame_terminator
-#endif
-
-#ifndef GL_NV_conditional_render
-#define GL_QUERY_WAIT_NV 0x8E13
-#define GL_QUERY_NO_WAIT_NV 0x8E14
-#define GL_QUERY_BY_REGION_WAIT_NV 0x8E15
-#define GL_QUERY_BY_REGION_NO_WAIT_NV 0x8E16
-#endif
-
-#ifndef GL_NV_present_video
-#define GL_FRAME_NV 0x8E26
-#define GL_FIELDS_NV 0x8E27
-#define GL_CURRENT_TIME_NV 0x8E28
-#define GL_NUM_FILL_STREAMS_NV 0x8E29
-#define GL_PRESENT_TIME_NV 0x8E2A
-#define GL_PRESENT_DURATION_NV 0x8E2B
-#endif
-
-#ifndef GL_EXT_transform_feedback
-#define GL_TRANSFORM_FEEDBACK_BUFFER_EXT 0x8C8E
-#define GL_TRANSFORM_FEEDBACK_BUFFER_START_EXT 0x8C84
-#define GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_EXT 0x8C85
-#define GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_EXT 0x8C8F
-#define GL_INTERLEAVED_ATTRIBS_EXT 0x8C8C
-#define GL_SEPARATE_ATTRIBS_EXT 0x8C8D
-#define GL_PRIMITIVES_GENERATED_EXT 0x8C87
-#define GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_EXT 0x8C88
-#define GL_RASTERIZER_DISCARD_EXT 0x8C89
-#define GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS_EXT 0x8C8A
-#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_EXT 0x8C8B
-#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_EXT 0x8C80
-#define GL_TRANSFORM_FEEDBACK_VARYINGS_EXT 0x8C83
-#define GL_TRANSFORM_FEEDBACK_BUFFER_MODE_EXT 0x8C7F
-#define GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH_EXT 0x8C76
-#endif
-
-#ifndef GL_EXT_direct_state_access
-#define GL_PROGRAM_MATRIX_EXT 0x8E2D
-#define GL_TRANSPOSE_PROGRAM_MATRIX_EXT 0x8E2E
-#define GL_PROGRAM_MATRIX_STACK_DEPTH_EXT 0x8E2F
-#endif
-
-#ifndef GL_EXT_vertex_array_bgra
-/* reuse GL_BGRA */
-#endif
-
-#ifndef GL_EXT_texture_swizzle
-#define GL_TEXTURE_SWIZZLE_R_EXT 0x8E42
-#define GL_TEXTURE_SWIZZLE_G_EXT 0x8E43
-#define GL_TEXTURE_SWIZZLE_B_EXT 0x8E44
-#define GL_TEXTURE_SWIZZLE_A_EXT 0x8E45
-#define GL_TEXTURE_SWIZZLE_RGBA_EXT 0x8E46
-#endif
-
-#ifndef GL_NV_explicit_multisample
-#define GL_SAMPLE_POSITION_NV 0x8E50
-#define GL_SAMPLE_MASK_NV 0x8E51
-#define GL_SAMPLE_MASK_VALUE_NV 0x8E52
-#define GL_TEXTURE_BINDING_RENDERBUFFER_NV 0x8E53
-#define GL_TEXTURE_RENDERBUFFER_DATA_STORE_BINDING_NV 0x8E54
-#define GL_TEXTURE_RENDERBUFFER_NV 0x8E55
-#define GL_SAMPLER_RENDERBUFFER_NV 0x8E56
-#define GL_INT_SAMPLER_RENDERBUFFER_NV 0x8E57
-#define GL_UNSIGNED_INT_SAMPLER_RENDERBUFFER_NV 0x8E58
-#define GL_MAX_SAMPLE_MASK_WORDS_NV 0x8E59
-#endif
-
-#ifndef GL_NV_transform_feedback2
-#define GL_TRANSFORM_FEEDBACK_NV 0x8E22
-#define GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED_NV 0x8E23
-#define GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE_NV 0x8E24
-#define GL_TRANSFORM_FEEDBACK_BINDING_NV 0x8E25
-#endif
-
-#ifndef GL_ATI_meminfo
-#define GL_VBO_FREE_MEMORY_ATI 0x87FB
-#define GL_TEXTURE_FREE_MEMORY_ATI 0x87FC
-#define GL_RENDERBUFFER_FREE_MEMORY_ATI 0x87FD
-#endif
-
-#ifndef GL_AMD_performance_monitor
-#define GL_COUNTER_TYPE_AMD 0x8BC0
-#define GL_COUNTER_RANGE_AMD 0x8BC1
-#define GL_UNSIGNED_INT64_AMD 0x8BC2
-#define GL_PERCENTAGE_AMD 0x8BC3
-#define GL_PERFMON_RESULT_AVAILABLE_AMD 0x8BC4
-#define GL_PERFMON_RESULT_SIZE_AMD 0x8BC5
-#define GL_PERFMON_RESULT_AMD 0x8BC6
-#endif
-
-#ifndef GL_AMD_texture_texture4
-#endif
-
-#ifndef GL_AMD_vertex_shader_tesselator
-#define GL_SAMPLER_BUFFER_AMD 0x9001
-#define GL_INT_SAMPLER_BUFFER_AMD 0x9002
-#define GL_UNSIGNED_INT_SAMPLER_BUFFER_AMD 0x9003
-#define GL_TESSELLATION_MODE_AMD 0x9004
-#define GL_TESSELLATION_FACTOR_AMD 0x9005
-#define GL_DISCRETE_AMD 0x9006
-#define GL_CONTINUOUS_AMD 0x9007
-#endif
-
-#ifndef GL_EXT_provoking_vertex
-#define GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION_EXT 0x8E4C
-#define GL_FIRST_VERTEX_CONVENTION_EXT 0x8E4D
-#define GL_LAST_VERTEX_CONVENTION_EXT 0x8E4E
-#define GL_PROVOKING_VERTEX_EXT 0x8E4F
-#endif
-
-#ifndef GL_EXT_texture_snorm
-#define GL_ALPHA_SNORM 0x9010
-#define GL_LUMINANCE_SNORM 0x9011
-#define GL_LUMINANCE_ALPHA_SNORM 0x9012
-#define GL_INTENSITY_SNORM 0x9013
-#define GL_ALPHA8_SNORM 0x9014
-#define GL_LUMINANCE8_SNORM 0x9015
-#define GL_LUMINANCE8_ALPHA8_SNORM 0x9016
-#define GL_INTENSITY8_SNORM 0x9017
-#define GL_ALPHA16_SNORM 0x9018
-#define GL_LUMINANCE16_SNORM 0x9019
-#define GL_LUMINANCE16_ALPHA16_SNORM 0x901A
-#define GL_INTENSITY16_SNORM 0x901B
-/* reuse GL_RED_SNORM */
-/* reuse GL_RG_SNORM */
-/* reuse GL_RGB_SNORM */
-/* reuse GL_RGBA_SNORM */
-/* reuse GL_R8_SNORM */
-/* reuse GL_RG8_SNORM */
-/* reuse GL_RGB8_SNORM */
-/* reuse GL_RGBA8_SNORM */
-/* reuse GL_R16_SNORM */
-/* reuse GL_RG16_SNORM */
-/* reuse GL_RGB16_SNORM */
-/* reuse GL_RGBA16_SNORM */
-/* reuse GL_SIGNED_NORMALIZED */
-#endif
-
-#ifndef GL_AMD_draw_buffers_blend
-#endif
-
-#ifndef GL_APPLE_texture_range
-#define GL_TEXTURE_RANGE_LENGTH_APPLE 0x85B7
-#define GL_TEXTURE_RANGE_POINTER_APPLE 0x85B8
-#define GL_TEXTURE_STORAGE_HINT_APPLE 0x85BC
-#define GL_STORAGE_PRIVATE_APPLE 0x85BD
-/* reuse GL_STORAGE_CACHED_APPLE */
-/* reuse GL_STORAGE_SHARED_APPLE */
-#endif
-
-#ifndef GL_APPLE_float_pixels
-#define GL_HALF_APPLE 0x140B
-#define GL_RGBA_FLOAT32_APPLE 0x8814
-#define GL_RGB_FLOAT32_APPLE 0x8815
-#define GL_ALPHA_FLOAT32_APPLE 0x8816
-#define GL_INTENSITY_FLOAT32_APPLE 0x8817
-#define GL_LUMINANCE_FLOAT32_APPLE 0x8818
-#define GL_LUMINANCE_ALPHA_FLOAT32_APPLE 0x8819
-#define GL_RGBA_FLOAT16_APPLE 0x881A
-#define GL_RGB_FLOAT16_APPLE 0x881B
-#define GL_ALPHA_FLOAT16_APPLE 0x881C
-#define GL_INTENSITY_FLOAT16_APPLE 0x881D
-#define GL_LUMINANCE_FLOAT16_APPLE 0x881E
-#define GL_LUMINANCE_ALPHA_FLOAT16_APPLE 0x881F
-#define GL_COLOR_FLOAT_APPLE 0x8A0F
-#endif
-
-#ifndef GL_APPLE_vertex_program_evaluators
-#define GL_VERTEX_ATTRIB_MAP1_APPLE 0x8A00
-#define GL_VERTEX_ATTRIB_MAP2_APPLE 0x8A01
-#define GL_VERTEX_ATTRIB_MAP1_SIZE_APPLE 0x8A02
-#define GL_VERTEX_ATTRIB_MAP1_COEFF_APPLE 0x8A03
-#define GL_VERTEX_ATTRIB_MAP1_ORDER_APPLE 0x8A04
-#define GL_VERTEX_ATTRIB_MAP1_DOMAIN_APPLE 0x8A05
-#define GL_VERTEX_ATTRIB_MAP2_SIZE_APPLE 0x8A06
-#define GL_VERTEX_ATTRIB_MAP2_COEFF_APPLE 0x8A07
-#define GL_VERTEX_ATTRIB_MAP2_ORDER_APPLE 0x8A08
-#define GL_VERTEX_ATTRIB_MAP2_DOMAIN_APPLE 0x8A09
-#endif
-
-#ifndef GL_APPLE_aux_depth_stencil
-#define GL_AUX_DEPTH_STENCIL_APPLE 0x8A14
-#endif
-
-#ifndef GL_APPLE_object_purgeable
-#define GL_BUFFER_OBJECT_APPLE 0x85B3
-#define GL_RELEASED_APPLE 0x8A19
-#define GL_VOLATILE_APPLE 0x8A1A
-#define GL_RETAINED_APPLE 0x8A1B
-#define GL_UNDEFINED_APPLE 0x8A1C
-#define GL_PURGEABLE_APPLE 0x8A1D
-#endif
-
-#ifndef GL_APPLE_row_bytes
-#define GL_PACK_ROW_BYTES_APPLE 0x8A15
-#define GL_UNPACK_ROW_BYTES_APPLE 0x8A16
-#endif
-
-#ifndef GL_APPLE_rgb_422
-#define GL_RGB_422_APPLE 0x8A1F
-/* reuse GL_UNSIGNED_SHORT_8_8_APPLE */
-/* reuse GL_UNSIGNED_SHORT_8_8_REV_APPLE */
-#endif
-
-#ifndef GL_NV_video_capture
-#define GL_VIDEO_BUFFER_NV 0x9020
-#define GL_VIDEO_BUFFER_BINDING_NV 0x9021
-#define GL_FIELD_UPPER_NV 0x9022
-#define GL_FIELD_LOWER_NV 0x9023
-#define GL_NUM_VIDEO_CAPTURE_STREAMS_NV 0x9024
-#define GL_NEXT_VIDEO_CAPTURE_BUFFER_STATUS_NV 0x9025
-#define GL_VIDEO_CAPTURE_TO_422_SUPPORTED_NV 0x9026
-#define GL_LAST_VIDEO_CAPTURE_STATUS_NV 0x9027
-#define GL_VIDEO_BUFFER_PITCH_NV 0x9028
-#define GL_VIDEO_COLOR_CONVERSION_MATRIX_NV 0x9029
-#define GL_VIDEO_COLOR_CONVERSION_MAX_NV 0x902A
-#define GL_VIDEO_COLOR_CONVERSION_MIN_NV 0x902B
-#define GL_VIDEO_COLOR_CONVERSION_OFFSET_NV 0x902C
-#define GL_VIDEO_BUFFER_INTERNAL_FORMAT_NV 0x902D
-#define GL_PARTIAL_SUCCESS_NV 0x902E
-#define GL_SUCCESS_NV 0x902F
-#define GL_FAILURE_NV 0x9030
-#define GL_YCBYCR8_422_NV 0x9031
-#define GL_YCBAYCR8A_4224_NV 0x9032
-#define GL_Z6Y10Z6CB10Z6Y10Z6CR10_422_NV 0x9033
-#define GL_Z6Y10Z6CB10Z6A10Z6Y10Z6CR10Z6A10_4224_NV 0x9034
-#define GL_Z4Y12Z4CB12Z4Y12Z4CR12_422_NV 0x9035
-#define GL_Z4Y12Z4CB12Z4A12Z4Y12Z4CR12Z4A12_4224_NV 0x9036
-#define GL_Z4Y12Z4CB12Z4CR12_444_NV 0x9037
-#define GL_VIDEO_CAPTURE_FRAME_WIDTH_NV 0x9038
-#define GL_VIDEO_CAPTURE_FRAME_HEIGHT_NV 0x9039
-#define GL_VIDEO_CAPTURE_FIELD_UPPER_HEIGHT_NV 0x903A
-#define GL_VIDEO_CAPTURE_FIELD_LOWER_HEIGHT_NV 0x903B
-#define GL_VIDEO_CAPTURE_SURFACE_ORIGIN_NV 0x903C
-#endif
-
-#ifndef GL_NV_copy_image
-#endif
-
-#ifndef GL_EXT_separate_shader_objects
-#define GL_ACTIVE_PROGRAM_EXT 0x8B8D
-#endif
-
-#ifndef GL_NV_parameter_buffer_object2
-#endif
-
-#ifndef GL_NV_shader_buffer_load
-#define GL_BUFFER_GPU_ADDRESS_NV 0x8F1D
-#define GL_GPU_ADDRESS_NV 0x8F34
-#define GL_MAX_SHADER_BUFFER_ADDRESS_NV 0x8F35
-#endif
-
-#ifndef GL_NV_vertex_buffer_unified_memory
-#define GL_VERTEX_ATTRIB_ARRAY_UNIFIED_NV 0x8F1E
-#define GL_ELEMENT_ARRAY_UNIFIED_NV 0x8F1F
-#define GL_VERTEX_ATTRIB_ARRAY_ADDRESS_NV 0x8F20
-#define GL_VERTEX_ARRAY_ADDRESS_NV 0x8F21
-#define GL_NORMAL_ARRAY_ADDRESS_NV 0x8F22
-#define GL_COLOR_ARRAY_ADDRESS_NV 0x8F23
-#define GL_INDEX_ARRAY_ADDRESS_NV 0x8F24
-#define GL_TEXTURE_COORD_ARRAY_ADDRESS_NV 0x8F25
-#define GL_EDGE_FLAG_ARRAY_ADDRESS_NV 0x8F26
-#define GL_SECONDARY_COLOR_ARRAY_ADDRESS_NV 0x8F27
-#define GL_FOG_COORD_ARRAY_ADDRESS_NV 0x8F28
-#define GL_ELEMENT_ARRAY_ADDRESS_NV 0x8F29
-#define GL_VERTEX_ATTRIB_ARRAY_LENGTH_NV 0x8F2A
-#define GL_VERTEX_ARRAY_LENGTH_NV 0x8F2B
-#define GL_NORMAL_ARRAY_LENGTH_NV 0x8F2C
-#define GL_COLOR_ARRAY_LENGTH_NV 0x8F2D
-#define GL_INDEX_ARRAY_LENGTH_NV 0x8F2E
-#define GL_TEXTURE_COORD_ARRAY_LENGTH_NV 0x8F2F
-#define GL_EDGE_FLAG_ARRAY_LENGTH_NV 0x8F30
-#define GL_SECONDARY_COLOR_ARRAY_LENGTH_NV 0x8F31
-#define GL_FOG_COORD_ARRAY_LENGTH_NV 0x8F32
-#define GL_ELEMENT_ARRAY_LENGTH_NV 0x8F33
-#define GL_DRAW_INDIRECT_UNIFIED_NV 0x8F40
-#define GL_DRAW_INDIRECT_ADDRESS_NV 0x8F41
-#define GL_DRAW_INDIRECT_LENGTH_NV 0x8F42
-#endif
-
-#ifndef GL_NV_texture_barrier
-#endif
-
-#ifndef GL_AMD_shader_stencil_export
-#endif
-
-#ifndef GL_AMD_seamless_cubemap_per_texture
-/* reuse GL_TEXTURE_CUBE_MAP_SEAMLESS */
-#endif
-
-#ifndef GL_AMD_conservative_depth
-#endif
-
-#ifndef GL_EXT_shader_image_load_store
-#define GL_MAX_IMAGE_UNITS_EXT 0x8F38
-#define GL_MAX_COMBINED_IMAGE_UNITS_AND_FRAGMENT_OUTPUTS_EXT 0x8F39
-#define GL_IMAGE_BINDING_NAME_EXT 0x8F3A
-#define GL_IMAGE_BINDING_LEVEL_EXT 0x8F3B
-#define GL_IMAGE_BINDING_LAYERED_EXT 0x8F3C
-#define GL_IMAGE_BINDING_LAYER_EXT 0x8F3D
-#define GL_IMAGE_BINDING_ACCESS_EXT 0x8F3E
-#define GL_IMAGE_1D_EXT 0x904C
-#define GL_IMAGE_2D_EXT 0x904D
-#define GL_IMAGE_3D_EXT 0x904E
-#define GL_IMAGE_2D_RECT_EXT 0x904F
-#define GL_IMAGE_CUBE_EXT 0x9050
-#define GL_IMAGE_BUFFER_EXT 0x9051
-#define GL_IMAGE_1D_ARRAY_EXT 0x9052
-#define GL_IMAGE_2D_ARRAY_EXT 0x9053
-#define GL_IMAGE_CUBE_MAP_ARRAY_EXT 0x9054
-#define GL_IMAGE_2D_MULTISAMPLE_EXT 0x9055
-#define GL_IMAGE_2D_MULTISAMPLE_ARRAY_EXT 0x9056
-#define GL_INT_IMAGE_1D_EXT 0x9057
-#define GL_INT_IMAGE_2D_EXT 0x9058
-#define GL_INT_IMAGE_3D_EXT 0x9059
-#define GL_INT_IMAGE_2D_RECT_EXT 0x905A
-#define GL_INT_IMAGE_CUBE_EXT 0x905B
-#define GL_INT_IMAGE_BUFFER_EXT 0x905C
-#define GL_INT_IMAGE_1D_ARRAY_EXT 0x905D
-#define GL_INT_IMAGE_2D_ARRAY_EXT 0x905E
-#define GL_INT_IMAGE_CUBE_MAP_ARRAY_EXT 0x905F
-#define GL_INT_IMAGE_2D_MULTISAMPLE_EXT 0x9060
-#define GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY_EXT 0x9061
-#define GL_UNSIGNED_INT_IMAGE_1D_EXT 0x9062
-#define GL_UNSIGNED_INT_IMAGE_2D_EXT 0x9063
-#define GL_UNSIGNED_INT_IMAGE_3D_EXT 0x9064
-#define GL_UNSIGNED_INT_IMAGE_2D_RECT_EXT 0x9065
-#define GL_UNSIGNED_INT_IMAGE_CUBE_EXT 0x9066
-#define GL_UNSIGNED_INT_IMAGE_BUFFER_EXT 0x9067
-#define GL_UNSIGNED_INT_IMAGE_1D_ARRAY_EXT 0x9068
-#define GL_UNSIGNED_INT_IMAGE_2D_ARRAY_EXT 0x9069
-#define GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY_EXT 0x906A
-#define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_EXT 0x906B
-#define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY_EXT 0x906C
-#define GL_MAX_IMAGE_SAMPLES_EXT 0x906D
-#define GL_IMAGE_BINDING_FORMAT_EXT 0x906E
-#define GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT_EXT 0x00000001
-#define GL_ELEMENT_ARRAY_BARRIER_BIT_EXT 0x00000002
-#define GL_UNIFORM_BARRIER_BIT_EXT 0x00000004
-#define GL_TEXTURE_FETCH_BARRIER_BIT_EXT 0x00000008
-#define GL_SHADER_IMAGE_ACCESS_BARRIER_BIT_EXT 0x00000020
-#define GL_COMMAND_BARRIER_BIT_EXT 0x00000040
-#define GL_PIXEL_BUFFER_BARRIER_BIT_EXT 0x00000080
-#define GL_TEXTURE_UPDATE_BARRIER_BIT_EXT 0x00000100
-#define GL_BUFFER_UPDATE_BARRIER_BIT_EXT 0x00000200
-#define GL_FRAMEBUFFER_BARRIER_BIT_EXT 0x00000400
-#define GL_TRANSFORM_FEEDBACK_BARRIER_BIT_EXT 0x00000800
-#define GL_ATOMIC_COUNTER_BARRIER_BIT_EXT 0x00001000
-#define GL_ALL_BARRIER_BITS_EXT 0xFFFFFFFF
-#endif
-
-#ifndef GL_EXT_vertex_attrib_64bit
-/* reuse GL_DOUBLE */
-#define GL_DOUBLE_VEC2_EXT 0x8FFC
-#define GL_DOUBLE_VEC3_EXT 0x8FFD
-#define GL_DOUBLE_VEC4_EXT 0x8FFE
-#define GL_DOUBLE_MAT2_EXT 0x8F46
-#define GL_DOUBLE_MAT3_EXT 0x8F47
-#define GL_DOUBLE_MAT4_EXT 0x8F48
-#define GL_DOUBLE_MAT2x3_EXT 0x8F49
-#define GL_DOUBLE_MAT2x4_EXT 0x8F4A
-#define GL_DOUBLE_MAT3x2_EXT 0x8F4B
-#define GL_DOUBLE_MAT3x4_EXT 0x8F4C
-#define GL_DOUBLE_MAT4x2_EXT 0x8F4D
-#define GL_DOUBLE_MAT4x3_EXT 0x8F4E
-#endif
-
-#ifndef GL_NV_gpu_program5
-#define GL_MAX_GEOMETRY_PROGRAM_INVOCATIONS_NV 0x8E5A
-#define GL_MIN_FRAGMENT_INTERPOLATION_OFFSET_NV 0x8E5B
-#define GL_MAX_FRAGMENT_INTERPOLATION_OFFSET_NV 0x8E5C
-#define GL_FRAGMENT_PROGRAM_INTERPOLATION_OFFSET_BITS_NV 0x8E5D
-#define GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET_NV 0x8E5E
-#define GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET_NV 0x8E5F
-#define GL_MAX_PROGRAM_SUBROUTINE_PARAMETERS_NV 0x8F44
-#define GL_MAX_PROGRAM_SUBROUTINE_NUM_NV 0x8F45
-#endif
-
-#ifndef GL_NV_gpu_shader5
-#define GL_INT64_NV 0x140E
-#define GL_UNSIGNED_INT64_NV 0x140F
-#define GL_INT8_NV 0x8FE0
-#define GL_INT8_VEC2_NV 0x8FE1
-#define GL_INT8_VEC3_NV 0x8FE2
-#define GL_INT8_VEC4_NV 0x8FE3
-#define GL_INT16_NV 0x8FE4
-#define GL_INT16_VEC2_NV 0x8FE5
-#define GL_INT16_VEC3_NV 0x8FE6
-#define GL_INT16_VEC4_NV 0x8FE7
-#define GL_INT64_VEC2_NV 0x8FE9
-#define GL_INT64_VEC3_NV 0x8FEA
-#define GL_INT64_VEC4_NV 0x8FEB
-#define GL_UNSIGNED_INT8_NV 0x8FEC
-#define GL_UNSIGNED_INT8_VEC2_NV 0x8FED
-#define GL_UNSIGNED_INT8_VEC3_NV 0x8FEE
-#define GL_UNSIGNED_INT8_VEC4_NV 0x8FEF
-#define GL_UNSIGNED_INT16_NV 0x8FF0
-#define GL_UNSIGNED_INT16_VEC2_NV 0x8FF1
-#define GL_UNSIGNED_INT16_VEC3_NV 0x8FF2
-#define GL_UNSIGNED_INT16_VEC4_NV 0x8FF3
-#define GL_UNSIGNED_INT64_VEC2_NV 0x8FF5
-#define GL_UNSIGNED_INT64_VEC3_NV 0x8FF6
-#define GL_UNSIGNED_INT64_VEC4_NV 0x8FF7
-#define GL_FLOAT16_NV 0x8FF8
-#define GL_FLOAT16_VEC2_NV 0x8FF9
-#define GL_FLOAT16_VEC3_NV 0x8FFA
-#define GL_FLOAT16_VEC4_NV 0x8FFB
-/* reuse GL_PATCHES */
-#endif
-
-#ifndef GL_NV_shader_buffer_store
-#define GL_SHADER_GLOBAL_ACCESS_BARRIER_BIT_NV 0x00000010
-/* reuse GL_READ_WRITE */
-/* reuse GL_WRITE_ONLY */
-#endif
-
-#ifndef GL_NV_tessellation_program5
-#define GL_MAX_PROGRAM_PATCH_ATTRIBS_NV 0x86D8
-#define GL_TESS_CONTROL_PROGRAM_NV 0x891E
-#define GL_TESS_EVALUATION_PROGRAM_NV 0x891F
-#define GL_TESS_CONTROL_PROGRAM_PARAMETER_BUFFER_NV 0x8C74
-#define GL_TESS_EVALUATION_PROGRAM_PARAMETER_BUFFER_NV 0x8C75
-#endif
-
-#ifndef GL_NV_vertex_attrib_integer_64bit
-/* reuse GL_INT64_NV */
-/* reuse GL_UNSIGNED_INT64_NV */
-#endif
-
-#ifndef GL_NV_multisample_coverage
-#define GL_COVERAGE_SAMPLES_NV 0x80A9
-#define GL_COLOR_SAMPLES_NV 0x8E20
-#endif
-
-#ifndef GL_AMD_name_gen_delete
-#define GL_DATA_BUFFER_AMD 0x9151
-#define GL_PERFORMANCE_MONITOR_AMD 0x9152
-#define GL_QUERY_OBJECT_AMD 0x9153
-#define GL_VERTEX_ARRAY_OBJECT_AMD 0x9154
-#define GL_SAMPLER_OBJECT_AMD 0x9155
-#endif
-
-#ifndef GL_AMD_debug_output
-#define GL_MAX_DEBUG_LOGGED_MESSAGES_AMD 0x9144
-#define GL_DEBUG_LOGGED_MESSAGES_AMD 0x9145
-#define GL_DEBUG_SEVERITY_HIGH_AMD 0x9146
-#define GL_DEBUG_SEVERITY_MEDIUM_AMD 0x9147
-#define GL_DEBUG_SEVERITY_LOW_AMD 0x9148
-#define GL_DEBUG_CATEGORY_API_ERROR_AMD 0x9149
-#define GL_DEBUG_CATEGORY_WINDOW_SYSTEM_AMD 0x914A
-#define GL_DEBUG_CATEGORY_DEPRECATION_AMD 0x914B
-#define GL_DEBUG_CATEGORY_UNDEFINED_BEHAVIOR_AMD 0x914C
-#define GL_DEBUG_CATEGORY_PERFORMANCE_AMD 0x914D
-#define GL_DEBUG_CATEGORY_SHADER_COMPILER_AMD 0x914E
-#define GL_DEBUG_CATEGORY_APPLICATION_AMD 0x914F
-#define GL_DEBUG_CATEGORY_OTHER_AMD 0x9150
-#endif
-
-#ifndef GL_NV_vdpau_interop
-#define GL_SURFACE_STATE_NV 0x86EB
-#define GL_SURFACE_REGISTERED_NV 0x86FD
-#define GL_SURFACE_MAPPED_NV 0x8700
-#define GL_WRITE_DISCARD_NV 0x88BE
-#endif
-
-#ifndef GL_AMD_transform_feedback3_lines_triangles
-#endif
-
-#ifndef GL_AMD_depth_clamp_separate
-#define GL_DEPTH_CLAMP_NEAR_AMD 0x901E
-#define GL_DEPTH_CLAMP_FAR_AMD 0x901F
-#endif
-
-
-/*************************************************************/
-
-#include <stddef.h>
-#ifndef GL_VERSION_2_0
-/* GL type for program/shader text */
-typedef char GLchar;
-#endif
-
-#ifndef GL_VERSION_1_5
-/* GL types for handling large vertex buffer objects */
-typedef ptrdiff_t GLintptr;
-typedef ptrdiff_t GLsizeiptr;
-#endif
-
-#ifndef GL_ARB_vertex_buffer_object
-/* GL types for handling large vertex buffer objects */
-typedef ptrdiff_t GLintptrARB;
-typedef ptrdiff_t GLsizeiptrARB;
-#endif
-
-#ifndef GL_ARB_shader_objects
-/* GL types for program/shader text and shader object handles */
-typedef char GLcharARB;
-typedef unsigned int GLhandleARB;
-#endif
-
-/* GL type for "half" precision (s10e5) float data in host memory */
-#ifndef GL_ARB_half_float_pixel
-typedef unsigned short GLhalfARB;
-#endif
-
-#ifndef GL_NV_half_float
-typedef unsigned short GLhalfNV;
-#endif
-
-#ifndef GLEXT_64_TYPES_DEFINED
-/* This code block is duplicated in glxext.h, so must be protected */
-#define GLEXT_64_TYPES_DEFINED
-/* Define int32_t, int64_t, and uint64_t types for UST/MSC */
-/* (as used in the GL_EXT_timer_query extension). */
-#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-#include <inttypes.h>
-#elif defined(__sun__) || defined(__digital__)
-#include <inttypes.h>
-#if defined(__STDC__)
-#if defined(__arch64__) || defined(_LP64)
-typedef long int int64_t;
-typedef unsigned long int uint64_t;
-#else
-typedef long long int int64_t;
-typedef unsigned long long int uint64_t;
-#endif /* __arch64__ */
-#endif /* __STDC__ */
-#elif defined( __VMS ) || defined(__sgi)
-#include <inttypes.h>
-#elif defined(__SCO__) || defined(__USLC__)
-#include <stdint.h>
-#elif defined(__UNIXOS2__) || defined(__SOL64__)
-typedef long int int32_t;
-typedef long long int int64_t;
-typedef unsigned long long int uint64_t;
-#elif defined(_WIN32) && defined(__GNUC__)
-#include <stdint.h>
-#elif defined(_WIN32)
-typedef __int32 int32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-#else
-/* Fallback if nothing above works */
-#include <inttypes.h>
-#endif
-#endif
-
-#ifndef GL_EXT_timer_query
-typedef int64_t GLint64EXT;
-typedef uint64_t GLuint64EXT;
-#endif
-
-#ifndef GL_ARB_sync
-typedef int64_t GLint64;
-typedef uint64_t GLuint64;
-typedef struct __GLsync *GLsync;
-#endif
-
-#ifndef GL_ARB_cl_event
-/* These incomplete types let us declare types compatible with OpenCL's cl_context and cl_event */
-struct _cl_context;
-struct _cl_event;
-#endif
-
-#ifndef GL_ARB_debug_output
-typedef void (APIENTRY *GLDEBUGPROCARB)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,GLvoid *userParam);
-#endif
-
-#ifndef GL_AMD_debug_output
-typedef void (APIENTRY *GLDEBUGPROCAMD)(GLuint id,GLenum category,GLenum severity,GLsizei length,const GLchar *message,GLvoid *userParam);
-#endif
-
-#ifndef GL_NV_vdpau_interop
-typedef GLintptr GLvdpauSurfaceNV;
-#endif
-
-#ifndef GL_VERSION_1_2
-#define GL_VERSION_1_2 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendColor (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
-GLAPI void APIENTRY glBlendEquation (GLenum mode);
-GLAPI void APIENTRY glDrawRangeElements (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
-GLAPI void APIENTRY glTexImage3D (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glTexSubImage3D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glCopyTexSubImage3D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDCOLORPROC) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
-typedef void (APIENTRYP PFNGLBLENDEQUATIONPROC) (GLenum mode);
-typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTSPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
-typedef void (APIENTRYP PFNGLTEXIMAGE3DPROC) (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLTEXSUBIMAGE3DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE3DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-#endif
-
-#ifndef GL_VERSION_1_2_DEPRECATED
-#define GL_VERSION_1_2_DEPRECATED 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glColorTable (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
-GLAPI void APIENTRY glColorTableParameterfv (GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glColorTableParameteriv (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glCopyColorTable (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
-GLAPI void APIENTRY glGetColorTable (GLenum target, GLenum format, GLenum type, GLvoid *table);
-GLAPI void APIENTRY glGetColorTableParameterfv (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetColorTableParameteriv (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glColorSubTable (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
-GLAPI void APIENTRY glCopyColorSubTable (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
-GLAPI void APIENTRY glConvolutionFilter1D (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
-GLAPI void APIENTRY glConvolutionFilter2D (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
-GLAPI void APIENTRY glConvolutionParameterf (GLenum target, GLenum pname, GLfloat params);
-GLAPI void APIENTRY glConvolutionParameterfv (GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glConvolutionParameteri (GLenum target, GLenum pname, GLint params);
-GLAPI void APIENTRY glConvolutionParameteriv (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glCopyConvolutionFilter1D (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
-GLAPI void APIENTRY glCopyConvolutionFilter2D (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glGetConvolutionFilter (GLenum target, GLenum format, GLenum type, GLvoid *image);
-GLAPI void APIENTRY glGetConvolutionParameterfv (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetConvolutionParameteriv (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetSeparableFilter (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
-GLAPI void APIENTRY glSeparableFilter2D (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
-GLAPI void APIENTRY glGetHistogram (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
-GLAPI void APIENTRY glGetHistogramParameterfv (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetHistogramParameteriv (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetMinmax (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
-GLAPI void APIENTRY glGetMinmaxParameterfv (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetMinmaxParameteriv (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glHistogram (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
-GLAPI void APIENTRY glMinmax (GLenum target, GLenum internalformat, GLboolean sink);
-GLAPI void APIENTRY glResetHistogram (GLenum target);
-GLAPI void APIENTRY glResetMinmax (GLenum target);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOLORTABLEPROC) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
-typedef void (APIENTRYP PFNGLCOLORTABLEPARAMETERFVPROC) (GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLCOLORTABLEPARAMETERIVPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLCOPYCOLORTABLEPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
-typedef void (APIENTRYP PFNGLGETCOLORTABLEPROC) (GLenum target, GLenum format, GLenum type, GLvoid *table);
-typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERFVPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLCOLORSUBTABLEPROC) (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOPYCOLORSUBTABLEPROC) (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
-typedef void (APIENTRYP PFNGLCONVOLUTIONFILTER1DPROC) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
-typedef void (APIENTRYP PFNGLCONVOLUTIONFILTER2DPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
-typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERFPROC) (GLenum target, GLenum pname, GLfloat params);
-typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERFVPROC) (GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERIPROC) (GLenum target, GLenum pname, GLint params);
-typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERIVPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLCOPYCONVOLUTIONFILTER1DPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
-typedef void (APIENTRYP PFNGLCOPYCONVOLUTIONFILTER2DPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLGETCONVOLUTIONFILTERPROC) (GLenum target, GLenum format, GLenum type, GLvoid *image);
-typedef void (APIENTRYP PFNGLGETCONVOLUTIONPARAMETERFVPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETCONVOLUTIONPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETSEPARABLEFILTERPROC) (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
-typedef void (APIENTRYP PFNGLSEPARABLEFILTER2DPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
-typedef void (APIENTRYP PFNGLGETHISTOGRAMPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
-typedef void (APIENTRYP PFNGLGETHISTOGRAMPARAMETERFVPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETHISTOGRAMPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETMINMAXPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
-typedef void (APIENTRYP PFNGLGETMINMAXPARAMETERFVPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETMINMAXPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLHISTOGRAMPROC) (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
-typedef void (APIENTRYP PFNGLMINMAXPROC) (GLenum target, GLenum internalformat, GLboolean sink);
-typedef void (APIENTRYP PFNGLRESETHISTOGRAMPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLRESETMINMAXPROC) (GLenum target);
-#endif
-
-#ifndef GL_VERSION_1_3
-#define GL_VERSION_1_3 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glActiveTexture (GLenum texture);
-GLAPI void APIENTRY glSampleCoverage (GLclampf value, GLboolean invert);
-GLAPI void APIENTRY glCompressedTexImage3D (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexImage2D (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexImage1D (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexSubImage3D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexSubImage2D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexSubImage1D (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glGetCompressedTexImage (GLenum target, GLint level, GLvoid *img);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLACTIVETEXTUREPROC) (GLenum texture);
-typedef void (APIENTRYP PFNGLSAMPLECOVERAGEPROC) (GLclampf value, GLboolean invert);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE3DPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE2DPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE1DPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE1DPROC) (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXIMAGEPROC) (GLenum target, GLint level, GLvoid *img);
-#endif
-
-#ifndef GL_VERSION_1_3_DEPRECATED
-#define GL_VERSION_1_3_DEPRECATED 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glClientActiveTexture (GLenum texture);
-GLAPI void APIENTRY glMultiTexCoord1d (GLenum target, GLdouble s);
-GLAPI void APIENTRY glMultiTexCoord1dv (GLenum target, const GLdouble *v);
-GLAPI void APIENTRY glMultiTexCoord1f (GLenum target, GLfloat s);
-GLAPI void APIENTRY glMultiTexCoord1fv (GLenum target, const GLfloat *v);
-GLAPI void APIENTRY glMultiTexCoord1i (GLenum target, GLint s);
-GLAPI void APIENTRY glMultiTexCoord1iv (GLenum target, const GLint *v);
-GLAPI void APIENTRY glMultiTexCoord1s (GLenum target, GLshort s);
-GLAPI void APIENTRY glMultiTexCoord1sv (GLenum target, const GLshort *v);
-GLAPI void APIENTRY glMultiTexCoord2d (GLenum target, GLdouble s, GLdouble t);
-GLAPI void APIENTRY glMultiTexCoord2dv (GLenum target, const GLdouble *v);
-GLAPI void APIENTRY glMultiTexCoord2f (GLenum target, GLfloat s, GLfloat t);
-GLAPI void APIENTRY glMultiTexCoord2fv (GLenum target, const GLfloat *v);
-GLAPI void APIENTRY glMultiTexCoord2i (GLenum target, GLint s, GLint t);
-GLAPI void APIENTRY glMultiTexCoord2iv (GLenum target, const GLint *v);
-GLAPI void APIENTRY glMultiTexCoord2s (GLenum target, GLshort s, GLshort t);
-GLAPI void APIENTRY glMultiTexCoord2sv (GLenum target, const GLshort *v);
-GLAPI void APIENTRY glMultiTexCoord3d (GLenum target, GLdouble s, GLdouble t, GLdouble r);
-GLAPI void APIENTRY glMultiTexCoord3dv (GLenum target, const GLdouble *v);
-GLAPI void APIENTRY glMultiTexCoord3f (GLenum target, GLfloat s, GLfloat t, GLfloat r);
-GLAPI void APIENTRY glMultiTexCoord3fv (GLenum target, const GLfloat *v);
-GLAPI void APIENTRY glMultiTexCoord3i (GLenum target, GLint s, GLint t, GLint r);
-GLAPI void APIENTRY glMultiTexCoord3iv (GLenum target, const GLint *v);
-GLAPI void APIENTRY glMultiTexCoord3s (GLenum target, GLshort s, GLshort t, GLshort r);
-GLAPI void APIENTRY glMultiTexCoord3sv (GLenum target, const GLshort *v);
-GLAPI void APIENTRY glMultiTexCoord4d (GLenum target, GLdouble s, GLdouble t, GLdouble r, GLdouble q);
-GLAPI void APIENTRY glMultiTexCoord4dv (GLenum target, const GLdouble *v);
-GLAPI void APIENTRY glMultiTexCoord4f (GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
-GLAPI void APIENTRY glMultiTexCoord4fv (GLenum target, const GLfloat *v);
-GLAPI void APIENTRY glMultiTexCoord4i (GLenum target, GLint s, GLint t, GLint r, GLint q);
-GLAPI void APIENTRY glMultiTexCoord4iv (GLenum target, const GLint *v);
-GLAPI void APIENTRY glMultiTexCoord4s (GLenum target, GLshort s, GLshort t, GLshort r, GLshort q);
-GLAPI void APIENTRY glMultiTexCoord4sv (GLenum target, const GLshort *v);
-GLAPI void APIENTRY glLoadTransposeMatrixf (const GLfloat *m);
-GLAPI void APIENTRY glLoadTransposeMatrixd (const GLdouble *m);
-GLAPI void APIENTRY glMultTransposeMatrixf (const GLfloat *m);
-GLAPI void APIENTRY glMultTransposeMatrixd (const GLdouble *m);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCLIENTACTIVETEXTUREPROC) (GLenum texture);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1DPROC) (GLenum target, GLdouble s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1DVPROC) (GLenum target, const GLdouble *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1FPROC) (GLenum target, GLfloat s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1FVPROC) (GLenum target, const GLfloat *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1IPROC) (GLenum target, GLint s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1IVPROC) (GLenum target, const GLint *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1SPROC) (GLenum target, GLshort s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1SVPROC) (GLenum target, const GLshort *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2DPROC) (GLenum target, GLdouble s, GLdouble t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2DVPROC) (GLenum target, const GLdouble *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2FPROC) (GLenum target, GLfloat s, GLfloat t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2FVPROC) (GLenum target, const GLfloat *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2IPROC) (GLenum target, GLint s, GLint t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2IVPROC) (GLenum target, const GLint *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2SPROC) (GLenum target, GLshort s, GLshort t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2SVPROC) (GLenum target, const GLshort *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3DPROC) (GLenum target, GLdouble s, GLdouble t, GLdouble r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3DVPROC) (GLenum target, const GLdouble *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3FPROC) (GLenum target, GLfloat s, GLfloat t, GLfloat r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3FVPROC) (GLenum target, const GLfloat *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3IPROC) (GLenum target, GLint s, GLint t, GLint r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3IVPROC) (GLenum target, const GLint *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3SPROC) (GLenum target, GLshort s, GLshort t, GLshort r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3SVPROC) (GLenum target, const GLshort *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4DPROC) (GLenum target, GLdouble s, GLdouble t, GLdouble r, GLdouble q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4DVPROC) (GLenum target, const GLdouble *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4FPROC) (GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4FVPROC) (GLenum target, const GLfloat *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4IPROC) (GLenum target, GLint s, GLint t, GLint r, GLint q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4IVPROC) (GLenum target, const GLint *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4SPROC) (GLenum target, GLshort s, GLshort t, GLshort r, GLshort q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4SVPROC) (GLenum target, const GLshort *v);
-typedef void (APIENTRYP PFNGLLOADTRANSPOSEMATRIXFPROC) (const GLfloat *m);
-typedef void (APIENTRYP PFNGLLOADTRANSPOSEMATRIXDPROC) (const GLdouble *m);
-typedef void (APIENTRYP PFNGLMULTTRANSPOSEMATRIXFPROC) (const GLfloat *m);
-typedef void (APIENTRYP PFNGLMULTTRANSPOSEMATRIXDPROC) (const GLdouble *m);
-#endif
-
-#ifndef GL_VERSION_1_4
-#define GL_VERSION_1_4 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendFuncSeparate (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
-GLAPI void APIENTRY glMultiDrawArrays (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
-GLAPI void APIENTRY glMultiDrawElements (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount);
-GLAPI void APIENTRY glPointParameterf (GLenum pname, GLfloat param);
-GLAPI void APIENTRY glPointParameterfv (GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glPointParameteri (GLenum pname, GLint param);
-GLAPI void APIENTRY glPointParameteriv (GLenum pname, const GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEPROC) (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
-typedef void (APIENTRYP PFNGLMULTIDRAWARRAYSPROC) (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
-typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSPROC) (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount);
-typedef void (APIENTRYP PFNGLPOINTPARAMETERFPROC) (GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLPOINTPARAMETERFVPROC) (GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLPOINTPARAMETERIPROC) (GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLPOINTPARAMETERIVPROC) (GLenum pname, const GLint *params);
-#endif
-
-#ifndef GL_VERSION_1_4_DEPRECATED
-#define GL_VERSION_1_4_DEPRECATED 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFogCoordf (GLfloat coord);
-GLAPI void APIENTRY glFogCoordfv (const GLfloat *coord);
-GLAPI void APIENTRY glFogCoordd (GLdouble coord);
-GLAPI void APIENTRY glFogCoorddv (const GLdouble *coord);
-GLAPI void APIENTRY glFogCoordPointer (GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glSecondaryColor3b (GLbyte red, GLbyte green, GLbyte blue);
-GLAPI void APIENTRY glSecondaryColor3bv (const GLbyte *v);
-GLAPI void APIENTRY glSecondaryColor3d (GLdouble red, GLdouble green, GLdouble blue);
-GLAPI void APIENTRY glSecondaryColor3dv (const GLdouble *v);
-GLAPI void APIENTRY glSecondaryColor3f (GLfloat red, GLfloat green, GLfloat blue);
-GLAPI void APIENTRY glSecondaryColor3fv (const GLfloat *v);
-GLAPI void APIENTRY glSecondaryColor3i (GLint red, GLint green, GLint blue);
-GLAPI void APIENTRY glSecondaryColor3iv (const GLint *v);
-GLAPI void APIENTRY glSecondaryColor3s (GLshort red, GLshort green, GLshort blue);
-GLAPI void APIENTRY glSecondaryColor3sv (const GLshort *v);
-GLAPI void APIENTRY glSecondaryColor3ub (GLubyte red, GLubyte green, GLubyte blue);
-GLAPI void APIENTRY glSecondaryColor3ubv (const GLubyte *v);
-GLAPI void APIENTRY glSecondaryColor3ui (GLuint red, GLuint green, GLuint blue);
-GLAPI void APIENTRY glSecondaryColor3uiv (const GLuint *v);
-GLAPI void APIENTRY glSecondaryColor3us (GLushort red, GLushort green, GLushort blue);
-GLAPI void APIENTRY glSecondaryColor3usv (const GLushort *v);
-GLAPI void APIENTRY glSecondaryColorPointer (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glWindowPos2d (GLdouble x, GLdouble y);
-GLAPI void APIENTRY glWindowPos2dv (const GLdouble *v);
-GLAPI void APIENTRY glWindowPos2f (GLfloat x, GLfloat y);
-GLAPI void APIENTRY glWindowPos2fv (const GLfloat *v);
-GLAPI void APIENTRY glWindowPos2i (GLint x, GLint y);
-GLAPI void APIENTRY glWindowPos2iv (const GLint *v);
-GLAPI void APIENTRY glWindowPos2s (GLshort x, GLshort y);
-GLAPI void APIENTRY glWindowPos2sv (const GLshort *v);
-GLAPI void APIENTRY glWindowPos3d (GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glWindowPos3dv (const GLdouble *v);
-GLAPI void APIENTRY glWindowPos3f (GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glWindowPos3fv (const GLfloat *v);
-GLAPI void APIENTRY glWindowPos3i (GLint x, GLint y, GLint z);
-GLAPI void APIENTRY glWindowPos3iv (const GLint *v);
-GLAPI void APIENTRY glWindowPos3s (GLshort x, GLshort y, GLshort z);
-GLAPI void APIENTRY glWindowPos3sv (const GLshort *v);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFOGCOORDFPROC) (GLfloat coord);
-typedef void (APIENTRYP PFNGLFOGCOORDFVPROC) (const GLfloat *coord);
-typedef void (APIENTRYP PFNGLFOGCOORDDPROC) (GLdouble coord);
-typedef void (APIENTRYP PFNGLFOGCOORDDVPROC) (const GLdouble *coord);
-typedef void (APIENTRYP PFNGLFOGCOORDPOINTERPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3BPROC) (GLbyte red, GLbyte green, GLbyte blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3BVPROC) (const GLbyte *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3DPROC) (GLdouble red, GLdouble green, GLdouble blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3DVPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3FPROC) (GLfloat red, GLfloat green, GLfloat blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3FVPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3IPROC) (GLint red, GLint green, GLint blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3IVPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3SPROC) (GLshort red, GLshort green, GLshort blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3SVPROC) (const GLshort *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UBPROC) (GLubyte red, GLubyte green, GLubyte blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UBVPROC) (const GLubyte *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UIPROC) (GLuint red, GLuint green, GLuint blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UIVPROC) (const GLuint *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3USPROC) (GLushort red, GLushort green, GLushort blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3USVPROC) (const GLushort *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLORPOINTERPROC) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLWINDOWPOS2DPROC) (GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2DVPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2FPROC) (GLfloat x, GLfloat y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2FVPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2IPROC) (GLint x, GLint y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2IVPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2SPROC) (GLshort x, GLshort y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2SVPROC) (const GLshort *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3DPROC) (GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3DVPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3FPROC) (GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3FVPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3IPROC) (GLint x, GLint y, GLint z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3IVPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3SPROC) (GLshort x, GLshort y, GLshort z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3SVPROC) (const GLshort *v);
-#endif
-
-#ifndef GL_VERSION_1_5
-#define GL_VERSION_1_5 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGenQueries (GLsizei n, GLuint *ids);
-GLAPI void APIENTRY glDeleteQueries (GLsizei n, const GLuint *ids);
-GLAPI GLboolean APIENTRY glIsQuery (GLuint id);
-GLAPI void APIENTRY glBeginQuery (GLenum target, GLuint id);
-GLAPI void APIENTRY glEndQuery (GLenum target);
-GLAPI void APIENTRY glGetQueryiv (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetQueryObjectiv (GLuint id, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetQueryObjectuiv (GLuint id, GLenum pname, GLuint *params);
-GLAPI void APIENTRY glBindBuffer (GLenum target, GLuint buffer);
-GLAPI void APIENTRY glDeleteBuffers (GLsizei n, const GLuint *buffers);
-GLAPI void APIENTRY glGenBuffers (GLsizei n, GLuint *buffers);
-GLAPI GLboolean APIENTRY glIsBuffer (GLuint buffer);
-GLAPI void APIENTRY glBufferData (GLenum target, GLsizeiptr size, const GLvoid *data, GLenum usage);
-GLAPI void APIENTRY glBufferSubData (GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid *data);
-GLAPI void APIENTRY glGetBufferSubData (GLenum target, GLintptr offset, GLsizeiptr size, GLvoid *data);
-GLAPI GLvoid* APIENTRY glMapBuffer (GLenum target, GLenum access);
-GLAPI GLboolean APIENTRY glUnmapBuffer (GLenum target);
-GLAPI void APIENTRY glGetBufferParameteriv (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetBufferPointerv (GLenum target, GLenum pname, GLvoid* *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGENQUERIESPROC) (GLsizei n, GLuint *ids);
-typedef void (APIENTRYP PFNGLDELETEQUERIESPROC) (GLsizei n, const GLuint *ids);
-typedef GLboolean (APIENTRYP PFNGLISQUERYPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLBEGINQUERYPROC) (GLenum target, GLuint id);
-typedef void (APIENTRYP PFNGLENDQUERYPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLGETQUERYIVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETQUERYOBJECTIVPROC) (GLuint id, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETQUERYOBJECTUIVPROC) (GLuint id, GLenum pname, GLuint *params);
-typedef void (APIENTRYP PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
-typedef void (APIENTRYP PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
-typedef void (APIENTRYP PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
-typedef GLboolean (APIENTRYP PFNGLISBUFFERPROC) (GLuint buffer);
-typedef void (APIENTRYP PFNGLBUFFERDATAPROC) (GLenum target, GLsizeiptr size, const GLvoid *data, GLenum usage);
-typedef void (APIENTRYP PFNGLBUFFERSUBDATAPROC) (GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid *data);
-typedef void (APIENTRYP PFNGLGETBUFFERSUBDATAPROC) (GLenum target, GLintptr offset, GLsizeiptr size, GLvoid *data);
-typedef GLvoid* (APIENTRYP PFNGLMAPBUFFERPROC) (GLenum target, GLenum access);
-typedef GLboolean (APIENTRYP PFNGLUNMAPBUFFERPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETBUFFERPOINTERVPROC) (GLenum target, GLenum pname, GLvoid* *params);
-#endif
-
-#ifndef GL_VERSION_2_0
-#define GL_VERSION_2_0 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendEquationSeparate (GLenum modeRGB, GLenum modeAlpha);
-GLAPI void APIENTRY glDrawBuffers (GLsizei n, const GLenum *bufs);
-GLAPI void APIENTRY glStencilOpSeparate (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
-GLAPI void APIENTRY glStencilFuncSeparate (GLenum face, GLenum func, GLint ref, GLuint mask);
-GLAPI void APIENTRY glStencilMaskSeparate (GLenum face, GLuint mask);
-GLAPI void APIENTRY glAttachShader (GLuint program, GLuint shader);
-GLAPI void APIENTRY glBindAttribLocation (GLuint program, GLuint index, const GLchar *name);
-GLAPI void APIENTRY glCompileShader (GLuint shader);
-GLAPI GLuint APIENTRY glCreateProgram (void);
-GLAPI GLuint APIENTRY glCreateShader (GLenum type);
-GLAPI void APIENTRY glDeleteProgram (GLuint program);
-GLAPI void APIENTRY glDeleteShader (GLuint shader);
-GLAPI void APIENTRY glDetachShader (GLuint program, GLuint shader);
-GLAPI void APIENTRY glDisableVertexAttribArray (GLuint index);
-GLAPI void APIENTRY glEnableVertexAttribArray (GLuint index);
-GLAPI void APIENTRY glGetActiveAttrib (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
-GLAPI void APIENTRY glGetActiveUniform (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
-GLAPI void APIENTRY glGetAttachedShaders (GLuint program, GLsizei maxCount, GLsizei *count, GLuint *obj);
-GLAPI GLint APIENTRY glGetAttribLocation (GLuint program, const GLchar *name);
-GLAPI void APIENTRY glGetProgramiv (GLuint program, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetProgramInfoLog (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
-GLAPI void APIENTRY glGetShaderiv (GLuint shader, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetShaderInfoLog (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
-GLAPI void APIENTRY glGetShaderSource (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *source);
-GLAPI GLint APIENTRY glGetUniformLocation (GLuint program, const GLchar *name);
-GLAPI void APIENTRY glGetUniformfv (GLuint program, GLint location, GLfloat *params);
-GLAPI void APIENTRY glGetUniformiv (GLuint program, GLint location, GLint *params);
-GLAPI void APIENTRY glGetVertexAttribdv (GLuint index, GLenum pname, GLdouble *params);
-GLAPI void APIENTRY glGetVertexAttribfv (GLuint index, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetVertexAttribiv (GLuint index, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVertexAttribPointerv (GLuint index, GLenum pname, GLvoid* *pointer);
-GLAPI GLboolean APIENTRY glIsProgram (GLuint program);
-GLAPI GLboolean APIENTRY glIsShader (GLuint shader);
-GLAPI void APIENTRY glLinkProgram (GLuint program);
-GLAPI void APIENTRY glShaderSource (GLuint shader, GLsizei count, const GLchar* *string, const GLint *length);
-GLAPI void APIENTRY glUseProgram (GLuint program);
-GLAPI void APIENTRY glUniform1f (GLint location, GLfloat v0);
-GLAPI void APIENTRY glUniform2f (GLint location, GLfloat v0, GLfloat v1);
-GLAPI void APIENTRY glUniform3f (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
-GLAPI void APIENTRY glUniform4f (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-GLAPI void APIENTRY glUniform1i (GLint location, GLint v0);
-GLAPI void APIENTRY glUniform2i (GLint location, GLint v0, GLint v1);
-GLAPI void APIENTRY glUniform3i (GLint location, GLint v0, GLint v1, GLint v2);
-GLAPI void APIENTRY glUniform4i (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
-GLAPI void APIENTRY glUniform1fv (GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glUniform2fv (GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glUniform3fv (GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glUniform4fv (GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glUniform1iv (GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glUniform2iv (GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glUniform3iv (GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glUniform4iv (GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glUniformMatrix2fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix3fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix4fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glValidateProgram (GLuint program);
-GLAPI void APIENTRY glVertexAttrib1d (GLuint index, GLdouble x);
-GLAPI void APIENTRY glVertexAttrib1dv (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib1f (GLuint index, GLfloat x);
-GLAPI void APIENTRY glVertexAttrib1fv (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib1s (GLuint index, GLshort x);
-GLAPI void APIENTRY glVertexAttrib1sv (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib2d (GLuint index, GLdouble x, GLdouble y);
-GLAPI void APIENTRY glVertexAttrib2dv (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib2f (GLuint index, GLfloat x, GLfloat y);
-GLAPI void APIENTRY glVertexAttrib2fv (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib2s (GLuint index, GLshort x, GLshort y);
-GLAPI void APIENTRY glVertexAttrib2sv (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib3d (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glVertexAttrib3dv (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib3f (GLuint index, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glVertexAttrib3fv (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib3s (GLuint index, GLshort x, GLshort y, GLshort z);
-GLAPI void APIENTRY glVertexAttrib3sv (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib4Nbv (GLuint index, const GLbyte *v);
-GLAPI void APIENTRY glVertexAttrib4Niv (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttrib4Nsv (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib4Nub (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
-GLAPI void APIENTRY glVertexAttrib4Nubv (GLuint index, const GLubyte *v);
-GLAPI void APIENTRY glVertexAttrib4Nuiv (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttrib4Nusv (GLuint index, const GLushort *v);
-GLAPI void APIENTRY glVertexAttrib4bv (GLuint index, const GLbyte *v);
-GLAPI void APIENTRY glVertexAttrib4d (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glVertexAttrib4dv (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib4f (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glVertexAttrib4fv (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib4iv (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttrib4s (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
-GLAPI void APIENTRY glVertexAttrib4sv (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib4ubv (GLuint index, const GLubyte *v);
-GLAPI void APIENTRY glVertexAttrib4uiv (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttrib4usv (GLuint index, const GLushort *v);
-GLAPI void APIENTRY glVertexAttribPointer (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEPROC) (GLenum modeRGB, GLenum modeAlpha);
-typedef void (APIENTRYP PFNGLDRAWBUFFERSPROC) (GLsizei n, const GLenum *bufs);
-typedef void (APIENTRYP PFNGLSTENCILOPSEPARATEPROC) (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
-typedef void (APIENTRYP PFNGLSTENCILFUNCSEPARATEPROC) (GLenum face, GLenum func, GLint ref, GLuint mask);
-typedef void (APIENTRYP PFNGLSTENCILMASKSEPARATEPROC) (GLenum face, GLuint mask);
-typedef void (APIENTRYP PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
-typedef void (APIENTRYP PFNGLBINDATTRIBLOCATIONPROC) (GLuint program, GLuint index, const GLchar *name);
-typedef void (APIENTRYP PFNGLCOMPILESHADERPROC) (GLuint shader);
-typedef GLuint (APIENTRYP PFNGLCREATEPROGRAMPROC) (void);
-typedef GLuint (APIENTRYP PFNGLCREATESHADERPROC) (GLenum type);
-typedef void (APIENTRYP PFNGLDELETEPROGRAMPROC) (GLuint program);
-typedef void (APIENTRYP PFNGLDELETESHADERPROC) (GLuint shader);
-typedef void (APIENTRYP PFNGLDETACHSHADERPROC) (GLuint program, GLuint shader);
-typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint index);
-typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
-typedef void (APIENTRYP PFNGLGETACTIVEATTRIBPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
-typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
-typedef void (APIENTRYP PFNGLGETATTACHEDSHADERSPROC) (GLuint program, GLsizei maxCount, GLsizei *count, GLuint *obj);
-typedef GLint (APIENTRYP PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const GLchar *name);
-typedef void (APIENTRYP PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
-typedef void (APIENTRYP PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
-typedef void (APIENTRYP PFNGLGETSHADERSOURCEPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *source);
-typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const GLchar *name);
-typedef void (APIENTRYP PFNGLGETUNIFORMFVPROC) (GLuint program, GLint location, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETUNIFORMIVPROC) (GLuint program, GLint location, GLint *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBDVPROC) (GLuint index, GLenum pname, GLdouble *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBFVPROC) (GLuint index, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIVPROC) (GLuint index, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBPOINTERVPROC) (GLuint index, GLenum pname, GLvoid* *pointer);
-typedef GLboolean (APIENTRYP PFNGLISPROGRAMPROC) (GLuint program);
-typedef GLboolean (APIENTRYP PFNGLISSHADERPROC) (GLuint shader);
-typedef void (APIENTRYP PFNGLLINKPROGRAMPROC) (GLuint program);
-typedef void (APIENTRYP PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const GLchar* *string, const GLint *length);
-typedef void (APIENTRYP PFNGLUSEPROGRAMPROC) (GLuint program);
-typedef void (APIENTRYP PFNGLUNIFORM1FPROC) (GLint location, GLfloat v0);
-typedef void (APIENTRYP PFNGLUNIFORM2FPROC) (GLint location, GLfloat v0, GLfloat v1);
-typedef void (APIENTRYP PFNGLUNIFORM3FPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
-typedef void (APIENTRYP PFNGLUNIFORM4FPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-typedef void (APIENTRYP PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
-typedef void (APIENTRYP PFNGLUNIFORM2IPROC) (GLint location, GLint v0, GLint v1);
-typedef void (APIENTRYP PFNGLUNIFORM3IPROC) (GLint location, GLint v0, GLint v1, GLint v2);
-typedef void (APIENTRYP PFNGLUNIFORM4IPROC) (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
-typedef void (APIENTRYP PFNGLUNIFORM1FVPROC) (GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORM2FVPROC) (GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORM3FVPROC) (GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORM4FVPROC) (GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORM1IVPROC) (GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLUNIFORM2IVPROC) (GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLUNIFORM3IVPROC) (GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLUNIFORM4IVPROC) (GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX2FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX3FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLVALIDATEPROGRAMPROC) (GLuint program);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1DPROC) (GLuint index, GLdouble x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1DVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1FPROC) (GLuint index, GLfloat x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1FVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1SPROC) (GLuint index, GLshort x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1SVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2DPROC) (GLuint index, GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2DVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2FPROC) (GLuint index, GLfloat x, GLfloat y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2FVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2SPROC) (GLuint index, GLshort x, GLshort y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2SVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3DPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3DVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3FPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3FVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3SPROC) (GLuint index, GLshort x, GLshort y, GLshort z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3SVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NBVPROC) (GLuint index, const GLbyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NIVPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NSVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBPROC) (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBVPROC) (GLuint index, const GLubyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUIVPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUSVPROC) (GLuint index, const GLushort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4BVPROC) (GLuint index, const GLbyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4DPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4DVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4FPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4FVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4IVPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4SPROC) (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4SVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBVPROC) (GLuint index, const GLubyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4UIVPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4USVPROC) (GLuint index, const GLushort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
-#endif
-
-#ifndef GL_VERSION_2_1
-#define GL_VERSION_2_1 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glUniformMatrix2x3fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix3x2fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix2x4fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix4x2fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix3x4fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix4x3fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X3FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X2FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X2FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X3FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-#endif
-
-#ifndef GL_VERSION_3_0
-#define GL_VERSION_3_0 1
-/* OpenGL 3.0 also reuses entry points from these extensions: */
-/* ARB_framebuffer_object */
-/* ARB_map_buffer_range */
-/* ARB_vertex_array_object */
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glColorMaski (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
-GLAPI void APIENTRY glGetBooleani_v (GLenum target, GLuint index, GLboolean *data);
-GLAPI void APIENTRY glGetIntegeri_v (GLenum target, GLuint index, GLint *data);
-GLAPI void APIENTRY glEnablei (GLenum target, GLuint index);
-GLAPI void APIENTRY glDisablei (GLenum target, GLuint index);
-GLAPI GLboolean APIENTRY glIsEnabledi (GLenum target, GLuint index);
-GLAPI void APIENTRY glBeginTransformFeedback (GLenum primitiveMode);
-GLAPI void APIENTRY glEndTransformFeedback (void);
-GLAPI void APIENTRY glBindBufferRange (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
-GLAPI void APIENTRY glBindBufferBase (GLenum target, GLuint index, GLuint buffer);
-GLAPI void APIENTRY glTransformFeedbackVaryings (GLuint program, GLsizei count, const GLchar* *varyings, GLenum bufferMode);
-GLAPI void APIENTRY glGetTransformFeedbackVarying (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
-GLAPI void APIENTRY glClampColor (GLenum target, GLenum clamp);
-GLAPI void APIENTRY glBeginConditionalRender (GLuint id, GLenum mode);
-GLAPI void APIENTRY glEndConditionalRender (void);
-GLAPI void APIENTRY glVertexAttribIPointer (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glGetVertexAttribIiv (GLuint index, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVertexAttribIuiv (GLuint index, GLenum pname, GLuint *params);
-GLAPI void APIENTRY glVertexAttribI1i (GLuint index, GLint x);
-GLAPI void APIENTRY glVertexAttribI2i (GLuint index, GLint x, GLint y);
-GLAPI void APIENTRY glVertexAttribI3i (GLuint index, GLint x, GLint y, GLint z);
-GLAPI void APIENTRY glVertexAttribI4i (GLuint index, GLint x, GLint y, GLint z, GLint w);
-GLAPI void APIENTRY glVertexAttribI1ui (GLuint index, GLuint x);
-GLAPI void APIENTRY glVertexAttribI2ui (GLuint index, GLuint x, GLuint y);
-GLAPI void APIENTRY glVertexAttribI3ui (GLuint index, GLuint x, GLuint y, GLuint z);
-GLAPI void APIENTRY glVertexAttribI4ui (GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-GLAPI void APIENTRY glVertexAttribI1iv (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttribI2iv (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttribI3iv (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttribI4iv (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttribI1uiv (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttribI2uiv (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttribI3uiv (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttribI4uiv (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttribI4bv (GLuint index, const GLbyte *v);
-GLAPI void APIENTRY glVertexAttribI4sv (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttribI4ubv (GLuint index, const GLubyte *v);
-GLAPI void APIENTRY glVertexAttribI4usv (GLuint index, const GLushort *v);
-GLAPI void APIENTRY glGetUniformuiv (GLuint program, GLint location, GLuint *params);
-GLAPI void APIENTRY glBindFragDataLocation (GLuint program, GLuint color, const GLchar *name);
-GLAPI GLint APIENTRY glGetFragDataLocation (GLuint program, const GLchar *name);
-GLAPI void APIENTRY glUniform1ui (GLint location, GLuint v0);
-GLAPI void APIENTRY glUniform2ui (GLint location, GLuint v0, GLuint v1);
-GLAPI void APIENTRY glUniform3ui (GLint location, GLuint v0, GLuint v1, GLuint v2);
-GLAPI void APIENTRY glUniform4ui (GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-GLAPI void APIENTRY glUniform1uiv (GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glUniform2uiv (GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glUniform3uiv (GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glUniform4uiv (GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glTexParameterIiv (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glTexParameterIuiv (GLenum target, GLenum pname, const GLuint *params);
-GLAPI void APIENTRY glGetTexParameterIiv (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetTexParameterIuiv (GLenum target, GLenum pname, GLuint *params);
-GLAPI void APIENTRY glClearBufferiv (GLenum buffer, GLint drawbuffer, const GLint *value);
-GLAPI void APIENTRY glClearBufferuiv (GLenum buffer, GLint drawbuffer, const GLuint *value);
-GLAPI void APIENTRY glClearBufferfv (GLenum buffer, GLint drawbuffer, const GLfloat *value);
-GLAPI void APIENTRY glClearBufferfi (GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
-GLAPI const GLubyte * APIENTRY glGetStringi (GLenum name, GLuint index);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOLORMASKIPROC) (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
-typedef void (APIENTRYP PFNGLGETBOOLEANI_VPROC) (GLenum target, GLuint index, GLboolean *data);
-typedef void (APIENTRYP PFNGLGETINTEGERI_VPROC) (GLenum target, GLuint index, GLint *data);
-typedef void (APIENTRYP PFNGLENABLEIPROC) (GLenum target, GLuint index);
-typedef void (APIENTRYP PFNGLDISABLEIPROC) (GLenum target, GLuint index);
-typedef GLboolean (APIENTRYP PFNGLISENABLEDIPROC) (GLenum target, GLuint index);
-typedef void (APIENTRYP PFNGLBEGINTRANSFORMFEEDBACKPROC) (GLenum primitiveMode);
-typedef void (APIENTRYP PFNGLENDTRANSFORMFEEDBACKPROC) (void);
-typedef void (APIENTRYP PFNGLBINDBUFFERRANGEPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
-typedef void (APIENTRYP PFNGLBINDBUFFERBASEPROC) (GLenum target, GLuint index, GLuint buffer);
-typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKVARYINGSPROC) (GLuint program, GLsizei count, const GLchar* *varyings, GLenum bufferMode);
-typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKVARYINGPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
-typedef void (APIENTRYP PFNGLCLAMPCOLORPROC) (GLenum target, GLenum clamp);
-typedef void (APIENTRYP PFNGLBEGINCONDITIONALRENDERPROC) (GLuint id, GLenum mode);
-typedef void (APIENTRYP PFNGLENDCONDITIONALRENDERPROC) (void);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBIPOINTERPROC) (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIIVPROC) (GLuint index, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIUIVPROC) (GLuint index, GLenum pname, GLuint *params);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IPROC) (GLuint index, GLint x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IPROC) (GLuint index, GLint x, GLint y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IPROC) (GLuint index, GLint x, GLint y, GLint z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IPROC) (GLuint index, GLint x, GLint y, GLint z, GLint w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIPROC) (GLuint index, GLuint x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIPROC) (GLuint index, GLuint x, GLuint y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIPROC) (GLuint index, GLuint x, GLuint y, GLuint z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIPROC) (GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IVPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IVPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IVPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IVPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIVPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIVPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIVPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIVPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4BVPROC) (GLuint index, const GLbyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4SVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UBVPROC) (GLuint index, const GLubyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4USVPROC) (GLuint index, const GLushort *v);
-typedef void (APIENTRYP PFNGLGETUNIFORMUIVPROC) (GLuint program, GLint location, GLuint *params);
-typedef void (APIENTRYP PFNGLBINDFRAGDATALOCATIONPROC) (GLuint program, GLuint color, const GLchar *name);
-typedef GLint (APIENTRYP PFNGLGETFRAGDATALOCATIONPROC) (GLuint program, const GLchar *name);
-typedef void (APIENTRYP PFNGLUNIFORM1UIPROC) (GLint location, GLuint v0);
-typedef void (APIENTRYP PFNGLUNIFORM2UIPROC) (GLint location, GLuint v0, GLuint v1);
-typedef void (APIENTRYP PFNGLUNIFORM3UIPROC) (GLint location, GLuint v0, GLuint v1, GLuint v2);
-typedef void (APIENTRYP PFNGLUNIFORM4UIPROC) (GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-typedef void (APIENTRYP PFNGLUNIFORM1UIVPROC) (GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLUNIFORM2UIVPROC) (GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLUNIFORM3UIVPROC) (GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLUNIFORM4UIVPROC) (GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLTEXPARAMETERIIVPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLTEXPARAMETERIUIVPROC) (GLenum target, GLenum pname, const GLuint *params);
-typedef void (APIENTRYP PFNGLGETTEXPARAMETERIIVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETTEXPARAMETERIUIVPROC) (GLenum target, GLenum pname, GLuint *params);
-typedef void (APIENTRYP PFNGLCLEARBUFFERIVPROC) (GLenum buffer, GLint drawbuffer, const GLint *value);
-typedef void (APIENTRYP PFNGLCLEARBUFFERUIVPROC) (GLenum buffer, GLint drawbuffer, const GLuint *value);
-typedef void (APIENTRYP PFNGLCLEARBUFFERFVPROC) (GLenum buffer, GLint drawbuffer, const GLfloat *value);
-typedef void (APIENTRYP PFNGLCLEARBUFFERFIPROC) (GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
-typedef const GLubyte * (APIENTRYP PFNGLGETSTRINGIPROC) (GLenum name, GLuint index);
-#endif
-
-#ifndef GL_VERSION_3_1
-#define GL_VERSION_3_1 1
-/* OpenGL 3.1 also reuses entry points from these extensions: */
-/* ARB_copy_buffer */
-/* ARB_uniform_buffer_object */
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawArraysInstanced (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
-GLAPI void APIENTRY glDrawElementsInstanced (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
-GLAPI void APIENTRY glTexBuffer (GLenum target, GLenum internalformat, GLuint buffer);
-GLAPI void APIENTRY glPrimitiveRestartIndex (GLuint index);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDPROC) (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
-typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
-typedef void (APIENTRYP PFNGLTEXBUFFERPROC) (GLenum target, GLenum internalformat, GLuint buffer);
-typedef void (APIENTRYP PFNGLPRIMITIVERESTARTINDEXPROC) (GLuint index);
-#endif
-
-#ifndef GL_VERSION_3_2
-#define GL_VERSION_3_2 1
-/* OpenGL 3.2 also reuses entry points from these extensions: */
-/* ARB_draw_elements_base_vertex */
-/* ARB_provoking_vertex */
-/* ARB_sync */
-/* ARB_texture_multisample */
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetInteger64i_v (GLenum target, GLuint index, GLint64 *data);
-GLAPI void APIENTRY glGetBufferParameteri64v (GLenum target, GLenum pname, GLint64 *params);
-GLAPI void APIENTRY glFramebufferTexture (GLenum target, GLenum attachment, GLuint texture, GLint level);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETINTEGER64I_VPROC) (GLenum target, GLuint index, GLint64 *data);
-typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERI64VPROC) (GLenum target, GLenum pname, GLint64 *params);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level);
-#endif
-
-#ifndef GL_VERSION_3_3
-#define GL_VERSION_3_3 1
-/* OpenGL 3.3 also reuses entry points from these extensions: */
-/* ARB_blend_func_extended */
-/* ARB_sampler_objects */
-/* ARB_explicit_attrib_location, but it has none */
-/* ARB_occlusion_query2 (no entry points) */
-/* ARB_shader_bit_encoding (no entry points) */
-/* ARB_texture_rgb10_a2ui (no entry points) */
-/* ARB_texture_swizzle (no entry points) */
-/* ARB_timer_query */
-/* ARB_vertex_type_2_10_10_10_rev */
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexAttribDivisor (GLuint index, GLuint divisor);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXATTRIBDIVISORPROC) (GLuint index, GLuint divisor);
-#endif
-
-#ifndef GL_VERSION_4_0
-#define GL_VERSION_4_0 1
-/* OpenGL 4.0 also reuses entry points from these extensions: */
-/* ARB_texture_query_lod (no entry points) */
-/* ARB_draw_indirect */
-/* ARB_gpu_shader5 (no entry points) */
-/* ARB_gpu_shader_fp64 */
-/* ARB_shader_subroutine */
-/* ARB_tessellation_shader */
-/* ARB_texture_buffer_object_rgb32 (no entry points) */
-/* ARB_texture_cube_map_array (no entry points) */
-/* ARB_texture_gather (no entry points) */
-/* ARB_transform_feedback2 */
-/* ARB_transform_feedback3 */
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glMinSampleShading (GLclampf value);
-GLAPI void APIENTRY glBlendEquationi (GLuint buf, GLenum mode);
-GLAPI void APIENTRY glBlendEquationSeparatei (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
-GLAPI void APIENTRY glBlendFunci (GLuint buf, GLenum src, GLenum dst);
-GLAPI void APIENTRY glBlendFuncSeparatei (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLMINSAMPLESHADINGPROC) (GLclampf value);
-typedef void (APIENTRYP PFNGLBLENDEQUATIONIPROC) (GLuint buf, GLenum mode);
-typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEIPROC) (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
-typedef void (APIENTRYP PFNGLBLENDFUNCIPROC) (GLuint buf, GLenum src, GLenum dst);
-typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEIPROC) (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
-#endif
-
-#ifndef GL_VERSION_4_1
-#define GL_VERSION_4_1 1
-/* OpenGL 4.1 also reuses entry points from these extensions: */
-/* ARB_ES2_compatibility */
-/* ARB_get_program_binary */
-/* ARB_separate_shader_objects */
-/* ARB_shader_precision (no entry points) */
-/* ARB_vertex_attrib_64bit */
-/* ARB_viewport_array */
-#endif
-
-#ifndef GL_ARB_multitexture
-#define GL_ARB_multitexture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glActiveTextureARB (GLenum texture);
-GLAPI void APIENTRY glClientActiveTextureARB (GLenum texture);
-GLAPI void APIENTRY glMultiTexCoord1dARB (GLenum target, GLdouble s);
-GLAPI void APIENTRY glMultiTexCoord1dvARB (GLenum target, const GLdouble *v);
-GLAPI void APIENTRY glMultiTexCoord1fARB (GLenum target, GLfloat s);
-GLAPI void APIENTRY glMultiTexCoord1fvARB (GLenum target, const GLfloat *v);
-GLAPI void APIENTRY glMultiTexCoord1iARB (GLenum target, GLint s);
-GLAPI void APIENTRY glMultiTexCoord1ivARB (GLenum target, const GLint *v);
-GLAPI void APIENTRY glMultiTexCoord1sARB (GLenum target, GLshort s);
-GLAPI void APIENTRY glMultiTexCoord1svARB (GLenum target, const GLshort *v);
-GLAPI void APIENTRY glMultiTexCoord2dARB (GLenum target, GLdouble s, GLdouble t);
-GLAPI void APIENTRY glMultiTexCoord2dvARB (GLenum target, const GLdouble *v);
-GLAPI void APIENTRY glMultiTexCoord2fARB (GLenum target, GLfloat s, GLfloat t);
-GLAPI void APIENTRY glMultiTexCoord2fvARB (GLenum target, const GLfloat *v);
-GLAPI void APIENTRY glMultiTexCoord2iARB (GLenum target, GLint s, GLint t);
-GLAPI void APIENTRY glMultiTexCoord2ivARB (GLenum target, const GLint *v);
-GLAPI void APIENTRY glMultiTexCoord2sARB (GLenum target, GLshort s, GLshort t);
-GLAPI void APIENTRY glMultiTexCoord2svARB (GLenum target, const GLshort *v);
-GLAPI void APIENTRY glMultiTexCoord3dARB (GLenum target, GLdouble s, GLdouble t, GLdouble r);
-GLAPI void APIENTRY glMultiTexCoord3dvARB (GLenum target, const GLdouble *v);
-GLAPI void APIENTRY glMultiTexCoord3fARB (GLenum target, GLfloat s, GLfloat t, GLfloat r);
-GLAPI void APIENTRY glMultiTexCoord3fvARB (GLenum target, const GLfloat *v);
-GLAPI void APIENTRY glMultiTexCoord3iARB (GLenum target, GLint s, GLint t, GLint r);
-GLAPI void APIENTRY glMultiTexCoord3ivARB (GLenum target, const GLint *v);
-GLAPI void APIENTRY glMultiTexCoord3sARB (GLenum target, GLshort s, GLshort t, GLshort r);
-GLAPI void APIENTRY glMultiTexCoord3svARB (GLenum target, const GLshort *v);
-GLAPI void APIENTRY glMultiTexCoord4dARB (GLenum target, GLdouble s, GLdouble t, GLdouble r, GLdouble q);
-GLAPI void APIENTRY glMultiTexCoord4dvARB (GLenum target, const GLdouble *v);
-GLAPI void APIENTRY glMultiTexCoord4fARB (GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
-GLAPI void APIENTRY glMultiTexCoord4fvARB (GLenum target, const GLfloat *v);
-GLAPI void APIENTRY glMultiTexCoord4iARB (GLenum target, GLint s, GLint t, GLint r, GLint q);
-GLAPI void APIENTRY glMultiTexCoord4ivARB (GLenum target, const GLint *v);
-GLAPI void APIENTRY glMultiTexCoord4sARB (GLenum target, GLshort s, GLshort t, GLshort r, GLshort q);
-GLAPI void APIENTRY glMultiTexCoord4svARB (GLenum target, const GLshort *v);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLACTIVETEXTUREARBPROC) (GLenum texture);
-typedef void (APIENTRYP PFNGLCLIENTACTIVETEXTUREARBPROC) (GLenum texture);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1DARBPROC) (GLenum target, GLdouble s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1DVARBPROC) (GLenum target, const GLdouble *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1FARBPROC) (GLenum target, GLfloat s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1FVARBPROC) (GLenum target, const GLfloat *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1IARBPROC) (GLenum target, GLint s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1IVARBPROC) (GLenum target, const GLint *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1SARBPROC) (GLenum target, GLshort s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1SVARBPROC) (GLenum target, const GLshort *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2DARBPROC) (GLenum target, GLdouble s, GLdouble t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2DVARBPROC) (GLenum target, const GLdouble *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2FARBPROC) (GLenum target, GLfloat s, GLfloat t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2FVARBPROC) (GLenum target, const GLfloat *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2IARBPROC) (GLenum target, GLint s, GLint t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2IVARBPROC) (GLenum target, const GLint *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2SARBPROC) (GLenum target, GLshort s, GLshort t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2SVARBPROC) (GLenum target, const GLshort *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3DARBPROC) (GLenum target, GLdouble s, GLdouble t, GLdouble r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3DVARBPROC) (GLenum target, const GLdouble *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3FARBPROC) (GLenum target, GLfloat s, GLfloat t, GLfloat r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3FVARBPROC) (GLenum target, const GLfloat *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3IARBPROC) (GLenum target, GLint s, GLint t, GLint r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3IVARBPROC) (GLenum target, const GLint *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3SARBPROC) (GLenum target, GLshort s, GLshort t, GLshort r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3SVARBPROC) (GLenum target, const GLshort *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4DARBPROC) (GLenum target, GLdouble s, GLdouble t, GLdouble r, GLdouble q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4DVARBPROC) (GLenum target, const GLdouble *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4FARBPROC) (GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4FVARBPROC) (GLenum target, const GLfloat *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4IARBPROC) (GLenum target, GLint s, GLint t, GLint r, GLint q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4IVARBPROC) (GLenum target, const GLint *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4SARBPROC) (GLenum target, GLshort s, GLshort t, GLshort r, GLshort q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4SVARBPROC) (GLenum target, const GLshort *v);
-#endif
-
-#ifndef GL_ARB_transpose_matrix
-#define GL_ARB_transpose_matrix 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glLoadTransposeMatrixfARB (const GLfloat *m);
-GLAPI void APIENTRY glLoadTransposeMatrixdARB (const GLdouble *m);
-GLAPI void APIENTRY glMultTransposeMatrixfARB (const GLfloat *m);
-GLAPI void APIENTRY glMultTransposeMatrixdARB (const GLdouble *m);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLLOADTRANSPOSEMATRIXFARBPROC) (const GLfloat *m);
-typedef void (APIENTRYP PFNGLLOADTRANSPOSEMATRIXDARBPROC) (const GLdouble *m);
-typedef void (APIENTRYP PFNGLMULTTRANSPOSEMATRIXFARBPROC) (const GLfloat *m);
-typedef void (APIENTRYP PFNGLMULTTRANSPOSEMATRIXDARBPROC) (const GLdouble *m);
-#endif
-
-#ifndef GL_ARB_multisample
-#define GL_ARB_multisample 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glSampleCoverageARB (GLclampf value, GLboolean invert);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSAMPLECOVERAGEARBPROC) (GLclampf value, GLboolean invert);
-#endif
-
-#ifndef GL_ARB_texture_env_add
-#define GL_ARB_texture_env_add 1
-#endif
-
-#ifndef GL_ARB_texture_cube_map
-#define GL_ARB_texture_cube_map 1
-#endif
-
-#ifndef GL_ARB_texture_compression
-#define GL_ARB_texture_compression 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glCompressedTexImage3DARB (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexImage2DARB (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexImage1DARB (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexSubImage3DARB (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexSubImage2DARB (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glCompressedTexSubImage1DARB (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *data);
-GLAPI void APIENTRY glGetCompressedTexImageARB (GLenum target, GLint level, GLvoid *img);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE3DARBPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE2DARBPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE1DARBPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE3DARBPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE2DARBPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE1DARBPROC) (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *data);
-typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXIMAGEARBPROC) (GLenum target, GLint level, GLvoid *img);
-#endif
-
-#ifndef GL_ARB_texture_border_clamp
-#define GL_ARB_texture_border_clamp 1
-#endif
-
-#ifndef GL_ARB_point_parameters
-#define GL_ARB_point_parameters 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPointParameterfARB (GLenum pname, GLfloat param);
-GLAPI void APIENTRY glPointParameterfvARB (GLenum pname, const GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPOINTPARAMETERFARBPROC) (GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLPOINTPARAMETERFVARBPROC) (GLenum pname, const GLfloat *params);
-#endif
-
-#ifndef GL_ARB_vertex_blend
-#define GL_ARB_vertex_blend 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glWeightbvARB (GLint size, const GLbyte *weights);
-GLAPI void APIENTRY glWeightsvARB (GLint size, const GLshort *weights);
-GLAPI void APIENTRY glWeightivARB (GLint size, const GLint *weights);
-GLAPI void APIENTRY glWeightfvARB (GLint size, const GLfloat *weights);
-GLAPI void APIENTRY glWeightdvARB (GLint size, const GLdouble *weights);
-GLAPI void APIENTRY glWeightubvARB (GLint size, const GLubyte *weights);
-GLAPI void APIENTRY glWeightusvARB (GLint size, const GLushort *weights);
-GLAPI void APIENTRY glWeightuivARB (GLint size, const GLuint *weights);
-GLAPI void APIENTRY glWeightPointerARB (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glVertexBlendARB (GLint count);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLWEIGHTBVARBPROC) (GLint size, const GLbyte *weights);
-typedef void (APIENTRYP PFNGLWEIGHTSVARBPROC) (GLint size, const GLshort *weights);
-typedef void (APIENTRYP PFNGLWEIGHTIVARBPROC) (GLint size, const GLint *weights);
-typedef void (APIENTRYP PFNGLWEIGHTFVARBPROC) (GLint size, const GLfloat *weights);
-typedef void (APIENTRYP PFNGLWEIGHTDVARBPROC) (GLint size, const GLdouble *weights);
-typedef void (APIENTRYP PFNGLWEIGHTUBVARBPROC) (GLint size, const GLubyte *weights);
-typedef void (APIENTRYP PFNGLWEIGHTUSVARBPROC) (GLint size, const GLushort *weights);
-typedef void (APIENTRYP PFNGLWEIGHTUIVARBPROC) (GLint size, const GLuint *weights);
-typedef void (APIENTRYP PFNGLWEIGHTPOINTERARBPROC) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLVERTEXBLENDARBPROC) (GLint count);
-#endif
-
-#ifndef GL_ARB_matrix_palette
-#define GL_ARB_matrix_palette 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glCurrentPaletteMatrixARB (GLint index);
-GLAPI void APIENTRY glMatrixIndexubvARB (GLint size, const GLubyte *indices);
-GLAPI void APIENTRY glMatrixIndexusvARB (GLint size, const GLushort *indices);
-GLAPI void APIENTRY glMatrixIndexuivARB (GLint size, const GLuint *indices);
-GLAPI void APIENTRY glMatrixIndexPointerARB (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCURRENTPALETTEMATRIXARBPROC) (GLint index);
-typedef void (APIENTRYP PFNGLMATRIXINDEXUBVARBPROC) (GLint size, const GLubyte *indices);
-typedef void (APIENTRYP PFNGLMATRIXINDEXUSVARBPROC) (GLint size, const GLushort *indices);
-typedef void (APIENTRYP PFNGLMATRIXINDEXUIVARBPROC) (GLint size, const GLuint *indices);
-typedef void (APIENTRYP PFNGLMATRIXINDEXPOINTERARBPROC) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif
-
-#ifndef GL_ARB_texture_env_combine
-#define GL_ARB_texture_env_combine 1
-#endif
-
-#ifndef GL_ARB_texture_env_crossbar
-#define GL_ARB_texture_env_crossbar 1
-#endif
-
-#ifndef GL_ARB_texture_env_dot3
-#define GL_ARB_texture_env_dot3 1
-#endif
-
-#ifndef GL_ARB_texture_mirrored_repeat
-#define GL_ARB_texture_mirrored_repeat 1
-#endif
-
-#ifndef GL_ARB_depth_texture
-#define GL_ARB_depth_texture 1
-#endif
-
-#ifndef GL_ARB_shadow
-#define GL_ARB_shadow 1
-#endif
-
-#ifndef GL_ARB_shadow_ambient
-#define GL_ARB_shadow_ambient 1
-#endif
-
-#ifndef GL_ARB_window_pos
-#define GL_ARB_window_pos 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glWindowPos2dARB (GLdouble x, GLdouble y);
-GLAPI void APIENTRY glWindowPos2dvARB (const GLdouble *v);
-GLAPI void APIENTRY glWindowPos2fARB (GLfloat x, GLfloat y);
-GLAPI void APIENTRY glWindowPos2fvARB (const GLfloat *v);
-GLAPI void APIENTRY glWindowPos2iARB (GLint x, GLint y);
-GLAPI void APIENTRY glWindowPos2ivARB (const GLint *v);
-GLAPI void APIENTRY glWindowPos2sARB (GLshort x, GLshort y);
-GLAPI void APIENTRY glWindowPos2svARB (const GLshort *v);
-GLAPI void APIENTRY glWindowPos3dARB (GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glWindowPos3dvARB (const GLdouble *v);
-GLAPI void APIENTRY glWindowPos3fARB (GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glWindowPos3fvARB (const GLfloat *v);
-GLAPI void APIENTRY glWindowPos3iARB (GLint x, GLint y, GLint z);
-GLAPI void APIENTRY glWindowPos3ivARB (const GLint *v);
-GLAPI void APIENTRY glWindowPos3sARB (GLshort x, GLshort y, GLshort z);
-GLAPI void APIENTRY glWindowPos3svARB (const GLshort *v);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLWINDOWPOS2DARBPROC) (GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2DVARBPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2FARBPROC) (GLfloat x, GLfloat y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2FVARBPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2IARBPROC) (GLint x, GLint y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2IVARBPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2SARBPROC) (GLshort x, GLshort y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2SVARBPROC) (const GLshort *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3DARBPROC) (GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3DVARBPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3FARBPROC) (GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3FVARBPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3IARBPROC) (GLint x, GLint y, GLint z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3IVARBPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3SARBPROC) (GLshort x, GLshort y, GLshort z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3SVARBPROC) (const GLshort *v);
-#endif
-
-#ifndef GL_ARB_vertex_program
-#define GL_ARB_vertex_program 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexAttrib1dARB (GLuint index, GLdouble x);
-GLAPI void APIENTRY glVertexAttrib1dvARB (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib1fARB (GLuint index, GLfloat x);
-GLAPI void APIENTRY glVertexAttrib1fvARB (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib1sARB (GLuint index, GLshort x);
-GLAPI void APIENTRY glVertexAttrib1svARB (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib2dARB (GLuint index, GLdouble x, GLdouble y);
-GLAPI void APIENTRY glVertexAttrib2dvARB (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib2fARB (GLuint index, GLfloat x, GLfloat y);
-GLAPI void APIENTRY glVertexAttrib2fvARB (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib2sARB (GLuint index, GLshort x, GLshort y);
-GLAPI void APIENTRY glVertexAttrib2svARB (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib3dARB (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glVertexAttrib3dvARB (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib3fARB (GLuint index, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glVertexAttrib3fvARB (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib3sARB (GLuint index, GLshort x, GLshort y, GLshort z);
-GLAPI void APIENTRY glVertexAttrib3svARB (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib4NbvARB (GLuint index, const GLbyte *v);
-GLAPI void APIENTRY glVertexAttrib4NivARB (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttrib4NsvARB (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib4NubARB (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
-GLAPI void APIENTRY glVertexAttrib4NubvARB (GLuint index, const GLubyte *v);
-GLAPI void APIENTRY glVertexAttrib4NuivARB (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttrib4NusvARB (GLuint index, const GLushort *v);
-GLAPI void APIENTRY glVertexAttrib4bvARB (GLuint index, const GLbyte *v);
-GLAPI void APIENTRY glVertexAttrib4dARB (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glVertexAttrib4dvARB (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib4fARB (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glVertexAttrib4fvARB (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib4ivARB (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttrib4sARB (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
-GLAPI void APIENTRY glVertexAttrib4svARB (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib4ubvARB (GLuint index, const GLubyte *v);
-GLAPI void APIENTRY glVertexAttrib4uivARB (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttrib4usvARB (GLuint index, const GLushort *v);
-GLAPI void APIENTRY glVertexAttribPointerARB (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glEnableVertexAttribArrayARB (GLuint index);
-GLAPI void APIENTRY glDisableVertexAttribArrayARB (GLuint index);
-GLAPI void APIENTRY glProgramStringARB (GLenum target, GLenum format, GLsizei len, const GLvoid *string);
-GLAPI void APIENTRY glBindProgramARB (GLenum target, GLuint program);
-GLAPI void APIENTRY glDeleteProgramsARB (GLsizei n, const GLuint *programs);
-GLAPI void APIENTRY glGenProgramsARB (GLsizei n, GLuint *programs);
-GLAPI void APIENTRY glProgramEnvParameter4dARB (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glProgramEnvParameter4dvARB (GLenum target, GLuint index, const GLdouble *params);
-GLAPI void APIENTRY glProgramEnvParameter4fARB (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glProgramEnvParameter4fvARB (GLenum target, GLuint index, const GLfloat *params);
-GLAPI void APIENTRY glProgramLocalParameter4dARB (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glProgramLocalParameter4dvARB (GLenum target, GLuint index, const GLdouble *params);
-GLAPI void APIENTRY glProgramLocalParameter4fARB (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glProgramLocalParameter4fvARB (GLenum target, GLuint index, const GLfloat *params);
-GLAPI void APIENTRY glGetProgramEnvParameterdvARB (GLenum target, GLuint index, GLdouble *params);
-GLAPI void APIENTRY glGetProgramEnvParameterfvARB (GLenum target, GLuint index, GLfloat *params);
-GLAPI void APIENTRY glGetProgramLocalParameterdvARB (GLenum target, GLuint index, GLdouble *params);
-GLAPI void APIENTRY glGetProgramLocalParameterfvARB (GLenum target, GLuint index, GLfloat *params);
-GLAPI void APIENTRY glGetProgramivARB (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetProgramStringARB (GLenum target, GLenum pname, GLvoid *string);
-GLAPI void APIENTRY glGetVertexAttribdvARB (GLuint index, GLenum pname, GLdouble *params);
-GLAPI void APIENTRY glGetVertexAttribfvARB (GLuint index, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetVertexAttribivARB (GLuint index, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVertexAttribPointervARB (GLuint index, GLenum pname, GLvoid* *pointer);
-GLAPI GLboolean APIENTRY glIsProgramARB (GLuint program);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1DARBPROC) (GLuint index, GLdouble x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1DVARBPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1FARBPROC) (GLuint index, GLfloat x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1FVARBPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1SARBPROC) (GLuint index, GLshort x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1SVARBPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2DARBPROC) (GLuint index, GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2DVARBPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2FARBPROC) (GLuint index, GLfloat x, GLfloat y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2FVARBPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2SARBPROC) (GLuint index, GLshort x, GLshort y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2SVARBPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3DARBPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3DVARBPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3FARBPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3FVARBPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3SARBPROC) (GLuint index, GLshort x, GLshort y, GLshort z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3SVARBPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NBVARBPROC) (GLuint index, const GLbyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NIVARBPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NSVARBPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBARBPROC) (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBVARBPROC) (GLuint index, const GLubyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUIVARBPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUSVARBPROC) (GLuint index, const GLushort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4BVARBPROC) (GLuint index, const GLbyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4DARBPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4DVARBPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4FARBPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4FVARBPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4IVARBPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4SARBPROC) (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4SVARBPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBVARBPROC) (GLuint index, const GLubyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4UIVARBPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4USVARBPROC) (GLuint index, const GLushort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERARBPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYARBPROC) (GLuint index);
-typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYARBPROC) (GLuint index);
-typedef void (APIENTRYP PFNGLPROGRAMSTRINGARBPROC) (GLenum target, GLenum format, GLsizei len, const GLvoid *string);
-typedef void (APIENTRYP PFNGLBINDPROGRAMARBPROC) (GLenum target, GLuint program);
-typedef void (APIENTRYP PFNGLDELETEPROGRAMSARBPROC) (GLsizei n, const GLuint *programs);
-typedef void (APIENTRYP PFNGLGENPROGRAMSARBPROC) (GLsizei n, GLuint *programs);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETER4DARBPROC) (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETER4DVARBPROC) (GLenum target, GLuint index, const GLdouble *params);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETER4FARBPROC) (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETER4FVARBPROC) (GLenum target, GLuint index, const GLfloat *params);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETER4DARBPROC) (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETER4DVARBPROC) (GLenum target, GLuint index, const GLdouble *params);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETER4FARBPROC) (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) (GLenum target, GLuint index, const GLfloat *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMENVPARAMETERDVARBPROC) (GLenum target, GLuint index, GLdouble *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMENVPARAMETERFVARBPROC) (GLenum target, GLuint index, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) (GLenum target, GLuint index, GLdouble *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMLOCALPARAMETERFVARBPROC) (GLenum target, GLuint index, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMIVARBPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMSTRINGARBPROC) (GLenum target, GLenum pname, GLvoid *string);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBDVARBPROC) (GLuint index, GLenum pname, GLdouble *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBFVARBPROC) (GLuint index, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIVARBPROC) (GLuint index, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBPOINTERVARBPROC) (GLuint index, GLenum pname, GLvoid* *pointer);
-typedef GLboolean (APIENTRYP PFNGLISPROGRAMARBPROC) (GLuint program);
-#endif
-
-#ifndef GL_ARB_fragment_program
-#define GL_ARB_fragment_program 1
-/* All ARB_fragment_program entry points are shared with ARB_vertex_program. */
-#endif
-
-#ifndef GL_ARB_vertex_buffer_object
-#define GL_ARB_vertex_buffer_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBindBufferARB (GLenum target, GLuint buffer);
-GLAPI void APIENTRY glDeleteBuffersARB (GLsizei n, const GLuint *buffers);
-GLAPI void APIENTRY glGenBuffersARB (GLsizei n, GLuint *buffers);
-GLAPI GLboolean APIENTRY glIsBufferARB (GLuint buffer);
-GLAPI void APIENTRY glBufferDataARB (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
-GLAPI void APIENTRY glBufferSubDataARB (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data);
-GLAPI void APIENTRY glGetBufferSubDataARB (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid *data);
-GLAPI GLvoid* APIENTRY glMapBufferARB (GLenum target, GLenum access);
-GLAPI GLboolean APIENTRY glUnmapBufferARB (GLenum target);
-GLAPI void APIENTRY glGetBufferParameterivARB (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetBufferPointervARB (GLenum target, GLenum pname, GLvoid* *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBINDBUFFERARBPROC) (GLenum target, GLuint buffer);
-typedef void (APIENTRYP PFNGLDELETEBUFFERSARBPROC) (GLsizei n, const GLuint *buffers);
-typedef void (APIENTRYP PFNGLGENBUFFERSARBPROC) (GLsizei n, GLuint *buffers);
-typedef GLboolean (APIENTRYP PFNGLISBUFFERARBPROC) (GLuint buffer);
-typedef void (APIENTRYP PFNGLBUFFERDATAARBPROC) (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
-typedef void (APIENTRYP PFNGLBUFFERSUBDATAARBPROC) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data);
-typedef void (APIENTRYP PFNGLGETBUFFERSUBDATAARBPROC) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid *data);
-typedef GLvoid* (APIENTRYP PFNGLMAPBUFFERARBPROC) (GLenum target, GLenum access);
-typedef GLboolean (APIENTRYP PFNGLUNMAPBUFFERARBPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERIVARBPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETBUFFERPOINTERVARBPROC) (GLenum target, GLenum pname, GLvoid* *params);
-#endif
-
-#ifndef GL_ARB_occlusion_query
-#define GL_ARB_occlusion_query 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGenQueriesARB (GLsizei n, GLuint *ids);
-GLAPI void APIENTRY glDeleteQueriesARB (GLsizei n, const GLuint *ids);
-GLAPI GLboolean APIENTRY glIsQueryARB (GLuint id);
-GLAPI void APIENTRY glBeginQueryARB (GLenum target, GLuint id);
-GLAPI void APIENTRY glEndQueryARB (GLenum target);
-GLAPI void APIENTRY glGetQueryivARB (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetQueryObjectivARB (GLuint id, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetQueryObjectuivARB (GLuint id, GLenum pname, GLuint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGENQUERIESARBPROC) (GLsizei n, GLuint *ids);
-typedef void (APIENTRYP PFNGLDELETEQUERIESARBPROC) (GLsizei n, const GLuint *ids);
-typedef GLboolean (APIENTRYP PFNGLISQUERYARBPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLBEGINQUERYARBPROC) (GLenum target, GLuint id);
-typedef void (APIENTRYP PFNGLENDQUERYARBPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLGETQUERYIVARBPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETQUERYOBJECTIVARBPROC) (GLuint id, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETQUERYOBJECTUIVARBPROC) (GLuint id, GLenum pname, GLuint *params);
-#endif
-
-#ifndef GL_ARB_shader_objects
-#define GL_ARB_shader_objects 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDeleteObjectARB (GLhandleARB obj);
-GLAPI GLhandleARB APIENTRY glGetHandleARB (GLenum pname);
-GLAPI void APIENTRY glDetachObjectARB (GLhandleARB containerObj, GLhandleARB attachedObj);
-GLAPI GLhandleARB APIENTRY glCreateShaderObjectARB (GLenum shaderType);
-GLAPI void APIENTRY glShaderSourceARB (GLhandleARB shaderObj, GLsizei count, const GLcharARB* *string, const GLint *length);
-GLAPI void APIENTRY glCompileShaderARB (GLhandleARB shaderObj);
-GLAPI GLhandleARB APIENTRY glCreateProgramObjectARB (void);
-GLAPI void APIENTRY glAttachObjectARB (GLhandleARB containerObj, GLhandleARB obj);
-GLAPI void APIENTRY glLinkProgramARB (GLhandleARB programObj);
-GLAPI void APIENTRY glUseProgramObjectARB (GLhandleARB programObj);
-GLAPI void APIENTRY glValidateProgramARB (GLhandleARB programObj);
-GLAPI void APIENTRY glUniform1fARB (GLint location, GLfloat v0);
-GLAPI void APIENTRY glUniform2fARB (GLint location, GLfloat v0, GLfloat v1);
-GLAPI void APIENTRY glUniform3fARB (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
-GLAPI void APIENTRY glUniform4fARB (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-GLAPI void APIENTRY glUniform1iARB (GLint location, GLint v0);
-GLAPI void APIENTRY glUniform2iARB (GLint location, GLint v0, GLint v1);
-GLAPI void APIENTRY glUniform3iARB (GLint location, GLint v0, GLint v1, GLint v2);
-GLAPI void APIENTRY glUniform4iARB (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
-GLAPI void APIENTRY glUniform1fvARB (GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glUniform2fvARB (GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glUniform3fvARB (GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glUniform4fvARB (GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glUniform1ivARB (GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glUniform2ivARB (GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glUniform3ivARB (GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glUniform4ivARB (GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glUniformMatrix2fvARB (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix3fvARB (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glUniformMatrix4fvARB (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glGetObjectParameterfvARB (GLhandleARB obj, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetObjectParameterivARB (GLhandleARB obj, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetInfoLogARB (GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *infoLog);
-GLAPI void APIENTRY glGetAttachedObjectsARB (GLhandleARB containerObj, GLsizei maxCount, GLsizei *count, GLhandleARB *obj);
-GLAPI GLint APIENTRY glGetUniformLocationARB (GLhandleARB programObj, const GLcharARB *name);
-GLAPI void APIENTRY glGetActiveUniformARB (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
-GLAPI void APIENTRY glGetUniformfvARB (GLhandleARB programObj, GLint location, GLfloat *params);
-GLAPI void APIENTRY glGetUniformivARB (GLhandleARB programObj, GLint location, GLint *params);
-GLAPI void APIENTRY glGetShaderSourceARB (GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *source);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDELETEOBJECTARBPROC) (GLhandleARB obj);
-typedef GLhandleARB (APIENTRYP PFNGLGETHANDLEARBPROC) (GLenum pname);
-typedef void (APIENTRYP PFNGLDETACHOBJECTARBPROC) (GLhandleARB containerObj, GLhandleARB attachedObj);
-typedef GLhandleARB (APIENTRYP PFNGLCREATESHADEROBJECTARBPROC) (GLenum shaderType);
-typedef void (APIENTRYP PFNGLSHADERSOURCEARBPROC) (GLhandleARB shaderObj, GLsizei count, const GLcharARB* *string, const GLint *length);
-typedef void (APIENTRYP PFNGLCOMPILESHADERARBPROC) (GLhandleARB shaderObj);
-typedef GLhandleARB (APIENTRYP PFNGLCREATEPROGRAMOBJECTARBPROC) (void);
-typedef void (APIENTRYP PFNGLATTACHOBJECTARBPROC) (GLhandleARB containerObj, GLhandleARB obj);
-typedef void (APIENTRYP PFNGLLINKPROGRAMARBPROC) (GLhandleARB programObj);
-typedef void (APIENTRYP PFNGLUSEPROGRAMOBJECTARBPROC) (GLhandleARB programObj);
-typedef void (APIENTRYP PFNGLVALIDATEPROGRAMARBPROC) (GLhandleARB programObj);
-typedef void (APIENTRYP PFNGLUNIFORM1FARBPROC) (GLint location, GLfloat v0);
-typedef void (APIENTRYP PFNGLUNIFORM2FARBPROC) (GLint location, GLfloat v0, GLfloat v1);
-typedef void (APIENTRYP PFNGLUNIFORM3FARBPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
-typedef void (APIENTRYP PFNGLUNIFORM4FARBPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-typedef void (APIENTRYP PFNGLUNIFORM1IARBPROC) (GLint location, GLint v0);
-typedef void (APIENTRYP PFNGLUNIFORM2IARBPROC) (GLint location, GLint v0, GLint v1);
-typedef void (APIENTRYP PFNGLUNIFORM3IARBPROC) (GLint location, GLint v0, GLint v1, GLint v2);
-typedef void (APIENTRYP PFNGLUNIFORM4IARBPROC) (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
-typedef void (APIENTRYP PFNGLUNIFORM1FVARBPROC) (GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORM2FVARBPROC) (GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORM3FVARBPROC) (GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORM4FVARBPROC) (GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORM1IVARBPROC) (GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLUNIFORM2IVARBPROC) (GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLUNIFORM3IVARBPROC) (GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLUNIFORM4IVARBPROC) (GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX2FVARBPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX3FVARBPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX4FVARBPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLGETOBJECTPARAMETERFVARBPROC) (GLhandleARB obj, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETOBJECTPARAMETERIVARBPROC) (GLhandleARB obj, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETINFOLOGARBPROC) (GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *infoLog);
-typedef void (APIENTRYP PFNGLGETATTACHEDOBJECTSARBPROC) (GLhandleARB containerObj, GLsizei maxCount, GLsizei *count, GLhandleARB *obj);
-typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONARBPROC) (GLhandleARB programObj, const GLcharARB *name);
-typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMARBPROC) (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
-typedef void (APIENTRYP PFNGLGETUNIFORMFVARBPROC) (GLhandleARB programObj, GLint location, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETUNIFORMIVARBPROC) (GLhandleARB programObj, GLint location, GLint *params);
-typedef void (APIENTRYP PFNGLGETSHADERSOURCEARBPROC) (GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *source);
-#endif
-
-#ifndef GL_ARB_vertex_shader
-#define GL_ARB_vertex_shader 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBindAttribLocationARB (GLhandleARB programObj, GLuint index, const GLcharARB *name);
-GLAPI void APIENTRY glGetActiveAttribARB (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
-GLAPI GLint APIENTRY glGetAttribLocationARB (GLhandleARB programObj, const GLcharARB *name);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBINDATTRIBLOCATIONARBPROC) (GLhandleARB programObj, GLuint index, const GLcharARB *name);
-typedef void (APIENTRYP PFNGLGETACTIVEATTRIBARBPROC) (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
-typedef GLint (APIENTRYP PFNGLGETATTRIBLOCATIONARBPROC) (GLhandleARB programObj, const GLcharARB *name);
-#endif
-
-#ifndef GL_ARB_fragment_shader
-#define GL_ARB_fragment_shader 1
-#endif
-
-#ifndef GL_ARB_shading_language_100
-#define GL_ARB_shading_language_100 1
-#endif
-
-#ifndef GL_ARB_texture_non_power_of_two
-#define GL_ARB_texture_non_power_of_two 1
-#endif
-
-#ifndef GL_ARB_point_sprite
-#define GL_ARB_point_sprite 1
-#endif
-
-#ifndef GL_ARB_fragment_program_shadow
-#define GL_ARB_fragment_program_shadow 1
-#endif
-
-#ifndef GL_ARB_draw_buffers
-#define GL_ARB_draw_buffers 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawBuffersARB (GLsizei n, const GLenum *bufs);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWBUFFERSARBPROC) (GLsizei n, const GLenum *bufs);
-#endif
-
-#ifndef GL_ARB_texture_rectangle
-#define GL_ARB_texture_rectangle 1
-#endif
-
-#ifndef GL_ARB_color_buffer_float
-#define GL_ARB_color_buffer_float 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glClampColorARB (GLenum target, GLenum clamp);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCLAMPCOLORARBPROC) (GLenum target, GLenum clamp);
-#endif
-
-#ifndef GL_ARB_half_float_pixel
-#define GL_ARB_half_float_pixel 1
-#endif
-
-#ifndef GL_ARB_texture_float
-#define GL_ARB_texture_float 1
-#endif
-
-#ifndef GL_ARB_pixel_buffer_object
-#define GL_ARB_pixel_buffer_object 1
-#endif
-
-#ifndef GL_ARB_depth_buffer_float
-#define GL_ARB_depth_buffer_float 1
-#endif
-
-#ifndef GL_ARB_draw_instanced
-#define GL_ARB_draw_instanced 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawArraysInstancedARB (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
-GLAPI void APIENTRY glDrawElementsInstancedARB (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDARBPROC) (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
-typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDARBPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
-#endif
-
-#ifndef GL_ARB_framebuffer_object
-#define GL_ARB_framebuffer_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLboolean APIENTRY glIsRenderbuffer (GLuint renderbuffer);
-GLAPI void APIENTRY glBindRenderbuffer (GLenum target, GLuint renderbuffer);
-GLAPI void APIENTRY glDeleteRenderbuffers (GLsizei n, const GLuint *renderbuffers);
-GLAPI void APIENTRY glGenRenderbuffers (GLsizei n, GLuint *renderbuffers);
-GLAPI void APIENTRY glRenderbufferStorage (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glGetRenderbufferParameteriv (GLenum target, GLenum pname, GLint *params);
-GLAPI GLboolean APIENTRY glIsFramebuffer (GLuint framebuffer);
-GLAPI void APIENTRY glBindFramebuffer (GLenum target, GLuint framebuffer);
-GLAPI void APIENTRY glDeleteFramebuffers (GLsizei n, const GLuint *framebuffers);
-GLAPI void APIENTRY glGenFramebuffers (GLsizei n, GLuint *framebuffers);
-GLAPI GLenum APIENTRY glCheckFramebufferStatus (GLenum target);
-GLAPI void APIENTRY glFramebufferTexture1D (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-GLAPI void APIENTRY glFramebufferTexture2D (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-GLAPI void APIENTRY glFramebufferTexture3D (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
-GLAPI void APIENTRY glFramebufferRenderbuffer (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
-GLAPI void APIENTRY glGetFramebufferAttachmentParameteriv (GLenum target, GLenum attachment, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGenerateMipmap (GLenum target);
-GLAPI void APIENTRY glBlitFramebuffer (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
-GLAPI void APIENTRY glRenderbufferStorageMultisample (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glFramebufferTextureLayer (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLboolean (APIENTRYP PFNGLISRENDERBUFFERPROC) (GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLBINDRENDERBUFFERPROC) (GLenum target, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLDELETERENDERBUFFERSPROC) (GLsizei n, const GLuint *renderbuffers);
-typedef void (APIENTRYP PFNGLGENRENDERBUFFERSPROC) (GLsizei n, GLuint *renderbuffers);
-typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLGETRENDERBUFFERPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef GLboolean (APIENTRYP PFNGLISFRAMEBUFFERPROC) (GLuint framebuffer);
-typedef void (APIENTRYP PFNGLBINDFRAMEBUFFERPROC) (GLenum target, GLuint framebuffer);
-typedef void (APIENTRYP PFNGLDELETEFRAMEBUFFERSPROC) (GLsizei n, const GLuint *framebuffers);
-typedef void (APIENTRYP PFNGLGENFRAMEBUFFERSPROC) (GLsizei n, GLuint *framebuffers);
-typedef GLenum (APIENTRYP PFNGLCHECKFRAMEBUFFERSTATUSPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE1DPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE2DPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE3DPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERRENDERBUFFERPROC) (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) (GLenum target, GLenum attachment, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGENERATEMIPMAPPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLBLITFRAMEBUFFERPROC) (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
-typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC) (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURELAYERPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
-#endif
-
-#ifndef GL_ARB_framebuffer_sRGB
-#define GL_ARB_framebuffer_sRGB 1
-#endif
-
-#ifndef GL_ARB_geometry_shader4
-#define GL_ARB_geometry_shader4 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProgramParameteriARB (GLuint program, GLenum pname, GLint value);
-GLAPI void APIENTRY glFramebufferTextureARB (GLenum target, GLenum attachment, GLuint texture, GLint level);
-GLAPI void APIENTRY glFramebufferTextureLayerARB (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
-GLAPI void APIENTRY glFramebufferTextureFaceARB (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETERIARBPROC) (GLuint program, GLenum pname, GLint value);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREARBPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURELAYERARBPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREFACEARBPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face);
-#endif
-
-#ifndef GL_ARB_half_float_vertex
-#define GL_ARB_half_float_vertex 1
-#endif
-
-#ifndef GL_ARB_instanced_arrays
-#define GL_ARB_instanced_arrays 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexAttribDivisorARB (GLuint index, GLuint divisor);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXATTRIBDIVISORARBPROC) (GLuint index, GLuint divisor);
-#endif
-
-#ifndef GL_ARB_map_buffer_range
-#define GL_ARB_map_buffer_range 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLvoid* APIENTRY glMapBufferRange (GLenum target, GLintptr offset, GLsizeiptr length, GLbitfield access);
-GLAPI void APIENTRY glFlushMappedBufferRange (GLenum target, GLintptr offset, GLsizeiptr length);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLvoid* (APIENTRYP PFNGLMAPBUFFERRANGEPROC) (GLenum target, GLintptr offset, GLsizeiptr length, GLbitfield access);
-typedef void (APIENTRYP PFNGLFLUSHMAPPEDBUFFERRANGEPROC) (GLenum target, GLintptr offset, GLsizeiptr length);
-#endif
-
-#ifndef GL_ARB_texture_buffer_object
-#define GL_ARB_texture_buffer_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTexBufferARB (GLenum target, GLenum internalformat, GLuint buffer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXBUFFERARBPROC) (GLenum target, GLenum internalformat, GLuint buffer);
-#endif
-
-#ifndef GL_ARB_texture_compression_rgtc
-#define GL_ARB_texture_compression_rgtc 1
-#endif
-
-#ifndef GL_ARB_texture_rg
-#define GL_ARB_texture_rg 1
-#endif
-
-#ifndef GL_ARB_vertex_array_object
-#define GL_ARB_vertex_array_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBindVertexArray (GLuint array);
-GLAPI void APIENTRY glDeleteVertexArrays (GLsizei n, const GLuint *arrays);
-GLAPI void APIENTRY glGenVertexArrays (GLsizei n, GLuint *arrays);
-GLAPI GLboolean APIENTRY glIsVertexArray (GLuint array);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBINDVERTEXARRAYPROC) (GLuint array);
-typedef void (APIENTRYP PFNGLDELETEVERTEXARRAYSPROC) (GLsizei n, const GLuint *arrays);
-typedef void (APIENTRYP PFNGLGENVERTEXARRAYSPROC) (GLsizei n, GLuint *arrays);
-typedef GLboolean (APIENTRYP PFNGLISVERTEXARRAYPROC) (GLuint array);
-#endif
-
-#ifndef GL_ARB_uniform_buffer_object
-#define GL_ARB_uniform_buffer_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetUniformIndices (GLuint program, GLsizei uniformCount, const GLchar* *uniformNames, GLuint *uniformIndices);
-GLAPI void APIENTRY glGetActiveUniformsiv (GLuint program, GLsizei uniformCount, const GLuint *uniformIndices, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetActiveUniformName (GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformName);
-GLAPI GLuint APIENTRY glGetUniformBlockIndex (GLuint program, const GLchar *uniformBlockName);
-GLAPI void APIENTRY glGetActiveUniformBlockiv (GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetActiveUniformBlockName (GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformBlockName);
-GLAPI void APIENTRY glUniformBlockBinding (GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETUNIFORMINDICESPROC) (GLuint program, GLsizei uniformCount, const GLchar* *uniformNames, GLuint *uniformIndices);
-typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMSIVPROC) (GLuint program, GLsizei uniformCount, const GLuint *uniformIndices, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMNAMEPROC) (GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformName);
-typedef GLuint (APIENTRYP PFNGLGETUNIFORMBLOCKINDEXPROC) (GLuint program, const GLchar *uniformBlockName);
-typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMBLOCKIVPROC) (GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC) (GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformBlockName);
-typedef void (APIENTRYP PFNGLUNIFORMBLOCKBINDINGPROC) (GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
-#endif
-
-#ifndef GL_ARB_compatibility
-#define GL_ARB_compatibility 1
-#endif
-
-#ifndef GL_ARB_copy_buffer
-#define GL_ARB_copy_buffer 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glCopyBufferSubData (GLenum readTarget, GLenum writeTarget, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOPYBUFFERSUBDATAPROC) (GLenum readTarget, GLenum writeTarget, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
-#endif
-
-#ifndef GL_ARB_shader_texture_lod
-#define GL_ARB_shader_texture_lod 1
-#endif
-
-#ifndef GL_ARB_depth_clamp
-#define GL_ARB_depth_clamp 1
-#endif
-
-#ifndef GL_ARB_draw_elements_base_vertex
-#define GL_ARB_draw_elements_base_vertex 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawElementsBaseVertex (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex);
-GLAPI void APIENTRY glDrawRangeElementsBaseVertex (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex);
-GLAPI void APIENTRY glDrawElementsInstancedBaseVertex (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount, GLint basevertex);
-GLAPI void APIENTRY glMultiDrawElementsBaseVertex (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount, const GLint *basevertex);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWELEMENTSBASEVERTEXPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex);
-typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex);
-typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount, GLint basevertex);
-typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC) (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount, const GLint *basevertex);
-#endif
-
-#ifndef GL_ARB_fragment_coord_conventions
-#define GL_ARB_fragment_coord_conventions 1
-#endif
-
-#ifndef GL_ARB_provoking_vertex
-#define GL_ARB_provoking_vertex 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProvokingVertex (GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROVOKINGVERTEXPROC) (GLenum mode);
-#endif
-
-#ifndef GL_ARB_seamless_cube_map
-#define GL_ARB_seamless_cube_map 1
-#endif
-
-#ifndef GL_ARB_sync
-#define GL_ARB_sync 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLsync APIENTRY glFenceSync (GLenum condition, GLbitfield flags);
-GLAPI GLboolean APIENTRY glIsSync (GLsync sync);
-GLAPI void APIENTRY glDeleteSync (GLsync sync);
-GLAPI GLenum APIENTRY glClientWaitSync (GLsync sync, GLbitfield flags, GLuint64 timeout);
-GLAPI void APIENTRY glWaitSync (GLsync sync, GLbitfield flags, GLuint64 timeout);
-GLAPI void APIENTRY glGetInteger64v (GLenum pname, GLint64 *params);
-GLAPI void APIENTRY glGetSynciv (GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLsync (APIENTRYP PFNGLFENCESYNCPROC) (GLenum condition, GLbitfield flags);
-typedef GLboolean (APIENTRYP PFNGLISSYNCPROC) (GLsync sync);
-typedef void (APIENTRYP PFNGLDELETESYNCPROC) (GLsync sync);
-typedef GLenum (APIENTRYP PFNGLCLIENTWAITSYNCPROC) (GLsync sync, GLbitfield flags, GLuint64 timeout);
-typedef void (APIENTRYP PFNGLWAITSYNCPROC) (GLsync sync, GLbitfield flags, GLuint64 timeout);
-typedef void (APIENTRYP PFNGLGETINTEGER64VPROC) (GLenum pname, GLint64 *params);
-typedef void (APIENTRYP PFNGLGETSYNCIVPROC) (GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
-#endif
-
-#ifndef GL_ARB_texture_multisample
-#define GL_ARB_texture_multisample 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTexImage2DMultisample (GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
-GLAPI void APIENTRY glTexImage3DMultisample (GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLboolean fixedsamplelocations);
-GLAPI void APIENTRY glGetMultisamplefv (GLenum pname, GLuint index, GLfloat *val);
-GLAPI void APIENTRY glSampleMaski (GLuint index, GLbitfield mask);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXIMAGE2DMULTISAMPLEPROC) (GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
-typedef void (APIENTRYP PFNGLTEXIMAGE3DMULTISAMPLEPROC) (GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLboolean fixedsamplelocations);
-typedef void (APIENTRYP PFNGLGETMULTISAMPLEFVPROC) (GLenum pname, GLuint index, GLfloat *val);
-typedef void (APIENTRYP PFNGLSAMPLEMASKIPROC) (GLuint index, GLbitfield mask);
-#endif
-
-#ifndef GL_ARB_vertex_array_bgra
-#define GL_ARB_vertex_array_bgra 1
-#endif
-
-#ifndef GL_ARB_draw_buffers_blend
-#define GL_ARB_draw_buffers_blend 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendEquationiARB (GLuint buf, GLenum mode);
-GLAPI void APIENTRY glBlendEquationSeparateiARB (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
-GLAPI void APIENTRY glBlendFunciARB (GLuint buf, GLenum src, GLenum dst);
-GLAPI void APIENTRY glBlendFuncSeparateiARB (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDEQUATIONIARBPROC) (GLuint buf, GLenum mode);
-typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEIARBPROC) (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
-typedef void (APIENTRYP PFNGLBLENDFUNCIARBPROC) (GLuint buf, GLenum src, GLenum dst);
-typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEIARBPROC) (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
-#endif
-
-#ifndef GL_ARB_sample_shading
-#define GL_ARB_sample_shading 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glMinSampleShadingARB (GLclampf value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLMINSAMPLESHADINGARBPROC) (GLclampf value);
-#endif
-
-#ifndef GL_ARB_texture_cube_map_array
-#define GL_ARB_texture_cube_map_array 1
-#endif
-
-#ifndef GL_ARB_texture_gather
-#define GL_ARB_texture_gather 1
-#endif
-
-#ifndef GL_ARB_texture_query_lod
-#define GL_ARB_texture_query_lod 1
-#endif
-
-#ifndef GL_ARB_shading_language_include
-#define GL_ARB_shading_language_include 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glNamedStringARB (GLenum type, GLint namelen, const GLchar *name, GLint stringlen, const GLchar *string);
-GLAPI void APIENTRY glDeleteNamedStringARB (GLint namelen, const GLchar *name);
-GLAPI void APIENTRY glCompileShaderIncludeARB (GLuint shader, GLsizei count, const GLchar* *path, const GLint *length);
-GLAPI GLboolean APIENTRY glIsNamedStringARB (GLint namelen, const GLchar *name);
-GLAPI void APIENTRY glGetNamedStringARB (GLint namelen, const GLchar *name, GLsizei bufSize, GLint *stringlen, GLchar *string);
-GLAPI void APIENTRY glGetNamedStringivARB (GLint namelen, const GLchar *name, GLenum pname, GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLNAMEDSTRINGARBPROC) (GLenum type, GLint namelen, const GLchar *name, GLint stringlen, const GLchar *string);
-typedef void (APIENTRYP PFNGLDELETENAMEDSTRINGARBPROC) (GLint namelen, const GLchar *name);
-typedef void (APIENTRYP PFNGLCOMPILESHADERINCLUDEARBPROC) (GLuint shader, GLsizei count, const GLchar* *path, const GLint *length);
-typedef GLboolean (APIENTRYP PFNGLISNAMEDSTRINGARBPROC) (GLint namelen, const GLchar *name);
-typedef void (APIENTRYP PFNGLGETNAMEDSTRINGARBPROC) (GLint namelen, const GLchar *name, GLsizei bufSize, GLint *stringlen, GLchar *string);
-typedef void (APIENTRYP PFNGLGETNAMEDSTRINGIVARBPROC) (GLint namelen, const GLchar *name, GLenum pname, GLint *params);
-#endif
-
-#ifndef GL_ARB_texture_compression_bptc
-#define GL_ARB_texture_compression_bptc 1
-#endif
-
-#ifndef GL_ARB_blend_func_extended
-#define GL_ARB_blend_func_extended 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBindFragDataLocationIndexed (GLuint program, GLuint colorNumber, GLuint index, const GLchar *name);
-GLAPI GLint APIENTRY glGetFragDataIndex (GLuint program, const GLchar *name);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBINDFRAGDATALOCATIONINDEXEDPROC) (GLuint program, GLuint colorNumber, GLuint index, const GLchar *name);
-typedef GLint (APIENTRYP PFNGLGETFRAGDATAINDEXPROC) (GLuint program, const GLchar *name);
-#endif
-
-#ifndef GL_ARB_explicit_attrib_location
-#define GL_ARB_explicit_attrib_location 1
-#endif
-
-#ifndef GL_ARB_occlusion_query2
-#define GL_ARB_occlusion_query2 1
-#endif
-
-#ifndef GL_ARB_sampler_objects
-#define GL_ARB_sampler_objects 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGenSamplers (GLsizei count, GLuint *samplers);
-GLAPI void APIENTRY glDeleteSamplers (GLsizei count, const GLuint *samplers);
-GLAPI GLboolean APIENTRY glIsSampler (GLuint sampler);
-GLAPI void APIENTRY glBindSampler (GLuint unit, GLuint sampler);
-GLAPI void APIENTRY glSamplerParameteri (GLuint sampler, GLenum pname, GLint param);
-GLAPI void APIENTRY glSamplerParameteriv (GLuint sampler, GLenum pname, const GLint *param);
-GLAPI void APIENTRY glSamplerParameterf (GLuint sampler, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glSamplerParameterfv (GLuint sampler, GLenum pname, const GLfloat *param);
-GLAPI void APIENTRY glSamplerParameterIiv (GLuint sampler, GLenum pname, const GLint *param);
-GLAPI void APIENTRY glSamplerParameterIuiv (GLuint sampler, GLenum pname, const GLuint *param);
-GLAPI void APIENTRY glGetSamplerParameteriv (GLuint sampler, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetSamplerParameterIiv (GLuint sampler, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetSamplerParameterfv (GLuint sampler, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetSamplerParameterIuiv (GLuint sampler, GLenum pname, GLuint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGENSAMPLERSPROC) (GLsizei count, GLuint *samplers);
-typedef void (APIENTRYP PFNGLDELETESAMPLERSPROC) (GLsizei count, const GLuint *samplers);
-typedef GLboolean (APIENTRYP PFNGLISSAMPLERPROC) (GLuint sampler);
-typedef void (APIENTRYP PFNGLBINDSAMPLERPROC) (GLuint unit, GLuint sampler);
-typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIPROC) (GLuint sampler, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIVPROC) (GLuint sampler, GLenum pname, const GLint *param);
-typedef void (APIENTRYP PFNGLSAMPLERPARAMETERFPROC) (GLuint sampler, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLSAMPLERPARAMETERFVPROC) (GLuint sampler, GLenum pname, const GLfloat *param);
-typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIIVPROC) (GLuint sampler, GLenum pname, const GLint *param);
-typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIUIVPROC) (GLuint sampler, GLenum pname, const GLuint *param);
-typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIVPROC) (GLuint sampler, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIIVPROC) (GLuint sampler, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERFVPROC) (GLuint sampler, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIUIVPROC) (GLuint sampler, GLenum pname, GLuint *params);
-#endif
-
-#ifndef GL_ARB_texture_rgb10_a2ui
-#define GL_ARB_texture_rgb10_a2ui 1
-#endif
-
-#ifndef GL_ARB_texture_swizzle
-#define GL_ARB_texture_swizzle 1
-#endif
-
-#ifndef GL_ARB_timer_query
-#define GL_ARB_timer_query 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glQueryCounter (GLuint id, GLenum target);
-GLAPI void APIENTRY glGetQueryObjecti64v (GLuint id, GLenum pname, GLint64 *params);
-GLAPI void APIENTRY glGetQueryObjectui64v (GLuint id, GLenum pname, GLuint64 *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLQUERYCOUNTERPROC) (GLuint id, GLenum target);
-typedef void (APIENTRYP PFNGLGETQUERYOBJECTI64VPROC) (GLuint id, GLenum pname, GLint64 *params);
-typedef void (APIENTRYP PFNGLGETQUERYOBJECTUI64VPROC) (GLuint id, GLenum pname, GLuint64 *params);
-#endif
-
-#ifndef GL_ARB_vertex_type_2_10_10_10_rev
-#define GL_ARB_vertex_type_2_10_10_10_rev 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexP2ui (GLenum type, GLuint value);
-GLAPI void APIENTRY glVertexP2uiv (GLenum type, const GLuint *value);
-GLAPI void APIENTRY glVertexP3ui (GLenum type, GLuint value);
-GLAPI void APIENTRY glVertexP3uiv (GLenum type, const GLuint *value);
-GLAPI void APIENTRY glVertexP4ui (GLenum type, GLuint value);
-GLAPI void APIENTRY glVertexP4uiv (GLenum type, const GLuint *value);
-GLAPI void APIENTRY glTexCoordP1ui (GLenum type, GLuint coords);
-GLAPI void APIENTRY glTexCoordP1uiv (GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glTexCoordP2ui (GLenum type, GLuint coords);
-GLAPI void APIENTRY glTexCoordP2uiv (GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glTexCoordP3ui (GLenum type, GLuint coords);
-GLAPI void APIENTRY glTexCoordP3uiv (GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glTexCoordP4ui (GLenum type, GLuint coords);
-GLAPI void APIENTRY glTexCoordP4uiv (GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glMultiTexCoordP1ui (GLenum texture, GLenum type, GLuint coords);
-GLAPI void APIENTRY glMultiTexCoordP1uiv (GLenum texture, GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glMultiTexCoordP2ui (GLenum texture, GLenum type, GLuint coords);
-GLAPI void APIENTRY glMultiTexCoordP2uiv (GLenum texture, GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glMultiTexCoordP3ui (GLenum texture, GLenum type, GLuint coords);
-GLAPI void APIENTRY glMultiTexCoordP3uiv (GLenum texture, GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glMultiTexCoordP4ui (GLenum texture, GLenum type, GLuint coords);
-GLAPI void APIENTRY glMultiTexCoordP4uiv (GLenum texture, GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glNormalP3ui (GLenum type, GLuint coords);
-GLAPI void APIENTRY glNormalP3uiv (GLenum type, const GLuint *coords);
-GLAPI void APIENTRY glColorP3ui (GLenum type, GLuint color);
-GLAPI void APIENTRY glColorP3uiv (GLenum type, const GLuint *color);
-GLAPI void APIENTRY glColorP4ui (GLenum type, GLuint color);
-GLAPI void APIENTRY glColorP4uiv (GLenum type, const GLuint *color);
-GLAPI void APIENTRY glSecondaryColorP3ui (GLenum type, GLuint color);
-GLAPI void APIENTRY glSecondaryColorP3uiv (GLenum type, const GLuint *color);
-GLAPI void APIENTRY glVertexAttribP1ui (GLuint index, GLenum type, GLboolean normalized, GLuint value);
-GLAPI void APIENTRY glVertexAttribP1uiv (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
-GLAPI void APIENTRY glVertexAttribP2ui (GLuint index, GLenum type, GLboolean normalized, GLuint value);
-GLAPI void APIENTRY glVertexAttribP2uiv (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
-GLAPI void APIENTRY glVertexAttribP3ui (GLuint index, GLenum type, GLboolean normalized, GLuint value);
-GLAPI void APIENTRY glVertexAttribP3uiv (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
-GLAPI void APIENTRY glVertexAttribP4ui (GLuint index, GLenum type, GLboolean normalized, GLuint value);
-GLAPI void APIENTRY glVertexAttribP4uiv (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXP2UIPROC) (GLenum type, GLuint value);
-typedef void (APIENTRYP PFNGLVERTEXP2UIVPROC) (GLenum type, const GLuint *value);
-typedef void (APIENTRYP PFNGLVERTEXP3UIPROC) (GLenum type, GLuint value);
-typedef void (APIENTRYP PFNGLVERTEXP3UIVPROC) (GLenum type, const GLuint *value);
-typedef void (APIENTRYP PFNGLVERTEXP4UIPROC) (GLenum type, GLuint value);
-typedef void (APIENTRYP PFNGLVERTEXP4UIVPROC) (GLenum type, const GLuint *value);
-typedef void (APIENTRYP PFNGLTEXCOORDP1UIPROC) (GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLTEXCOORDP1UIVPROC) (GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLTEXCOORDP2UIPROC) (GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLTEXCOORDP2UIVPROC) (GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLTEXCOORDP3UIPROC) (GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLTEXCOORDP3UIVPROC) (GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLTEXCOORDP4UIPROC) (GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLTEXCOORDP4UIVPROC) (GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDP1UIPROC) (GLenum texture, GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDP1UIVPROC) (GLenum texture, GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDP2UIPROC) (GLenum texture, GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDP2UIVPROC) (GLenum texture, GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDP3UIPROC) (GLenum texture, GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDP3UIVPROC) (GLenum texture, GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDP4UIPROC) (GLenum texture, GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDP4UIVPROC) (GLenum texture, GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLNORMALP3UIPROC) (GLenum type, GLuint coords);
-typedef void (APIENTRYP PFNGLNORMALP3UIVPROC) (GLenum type, const GLuint *coords);
-typedef void (APIENTRYP PFNGLCOLORP3UIPROC) (GLenum type, GLuint color);
-typedef void (APIENTRYP PFNGLCOLORP3UIVPROC) (GLenum type, const GLuint *color);
-typedef void (APIENTRYP PFNGLCOLORP4UIPROC) (GLenum type, GLuint color);
-typedef void (APIENTRYP PFNGLCOLORP4UIVPROC) (GLenum type, const GLuint *color);
-typedef void (APIENTRYP PFNGLSECONDARYCOLORP3UIPROC) (GLenum type, GLuint color);
-typedef void (APIENTRYP PFNGLSECONDARYCOLORP3UIVPROC) (GLenum type, const GLuint *color);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBP1UIPROC) (GLuint index, GLenum type, GLboolean normalized, GLuint value);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBP1UIVPROC) (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBP2UIPROC) (GLuint index, GLenum type, GLboolean normalized, GLuint value);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBP2UIVPROC) (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBP3UIPROC) (GLuint index, GLenum type, GLboolean normalized, GLuint value);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBP3UIVPROC) (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBP4UIPROC) (GLuint index, GLenum type, GLboolean normalized, GLuint value);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBP4UIVPROC) (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
-#endif
-
-#ifndef GL_ARB_draw_indirect
-#define GL_ARB_draw_indirect 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawArraysIndirect (GLenum mode, const GLvoid *indirect);
-GLAPI void APIENTRY glDrawElementsIndirect (GLenum mode, GLenum type, const GLvoid *indirect);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWARRAYSINDIRECTPROC) (GLenum mode, const GLvoid *indirect);
-typedef void (APIENTRYP PFNGLDRAWELEMENTSINDIRECTPROC) (GLenum mode, GLenum type, const GLvoid *indirect);
-#endif
-
-#ifndef GL_ARB_gpu_shader5
-#define GL_ARB_gpu_shader5 1
-#endif
-
-#ifndef GL_ARB_gpu_shader_fp64
-#define GL_ARB_gpu_shader_fp64 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glUniform1d (GLint location, GLdouble x);
-GLAPI void APIENTRY glUniform2d (GLint location, GLdouble x, GLdouble y);
-GLAPI void APIENTRY glUniform3d (GLint location, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glUniform4d (GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glUniform1dv (GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glUniform2dv (GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glUniform3dv (GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glUniform4dv (GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix2dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix3dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix4dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix2x3dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix2x4dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix3x2dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix3x4dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix4x2dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glUniformMatrix4x3dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glGetUniformdv (GLuint program, GLint location, GLdouble *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLUNIFORM1DPROC) (GLint location, GLdouble x);
-typedef void (APIENTRYP PFNGLUNIFORM2DPROC) (GLint location, GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLUNIFORM3DPROC) (GLint location, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLUNIFORM4DPROC) (GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLUNIFORM1DVPROC) (GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORM2DVPROC) (GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORM3DVPROC) (GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORM4DVPROC) (GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX2DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX3DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX4DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X3DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X4DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X2DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X4DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X2DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X3DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLGETUNIFORMDVPROC) (GLuint program, GLint location, GLdouble *params);
-#endif
-
-#ifndef GL_ARB_shader_subroutine
-#define GL_ARB_shader_subroutine 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLint APIENTRY glGetSubroutineUniformLocation (GLuint program, GLenum shadertype, const GLchar *name);
-GLAPI GLuint APIENTRY glGetSubroutineIndex (GLuint program, GLenum shadertype, const GLchar *name);
-GLAPI void APIENTRY glGetActiveSubroutineUniformiv (GLuint program, GLenum shadertype, GLuint index, GLenum pname, GLint *values);
-GLAPI void APIENTRY glGetActiveSubroutineUniformName (GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
-GLAPI void APIENTRY glGetActiveSubroutineName (GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
-GLAPI void APIENTRY glUniformSubroutinesuiv (GLenum shadertype, GLsizei count, const GLuint *indices);
-GLAPI void APIENTRY glGetUniformSubroutineuiv (GLenum shadertype, GLint location, GLuint *params);
-GLAPI void APIENTRY glGetProgramStageiv (GLuint program, GLenum shadertype, GLenum pname, GLint *values);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLint (APIENTRYP PFNGLGETSUBROUTINEUNIFORMLOCATIONPROC) (GLuint program, GLenum shadertype, const GLchar *name);
-typedef GLuint (APIENTRYP PFNGLGETSUBROUTINEINDEXPROC) (GLuint program, GLenum shadertype, const GLchar *name);
-typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINEUNIFORMIVPROC) (GLuint program, GLenum shadertype, GLuint index, GLenum pname, GLint *values);
-typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINEUNIFORMNAMEPROC) (GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
-typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINENAMEPROC) (GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
-typedef void (APIENTRYP PFNGLUNIFORMSUBROUTINESUIVPROC) (GLenum shadertype, GLsizei count, const GLuint *indices);
-typedef void (APIENTRYP PFNGLGETUNIFORMSUBROUTINEUIVPROC) (GLenum shadertype, GLint location, GLuint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMSTAGEIVPROC) (GLuint program, GLenum shadertype, GLenum pname, GLint *values);
-#endif
-
-#ifndef GL_ARB_tessellation_shader
-#define GL_ARB_tessellation_shader 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPatchParameteri (GLenum pname, GLint value);
-GLAPI void APIENTRY glPatchParameterfv (GLenum pname, const GLfloat *values);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPATCHPARAMETERIPROC) (GLenum pname, GLint value);
-typedef void (APIENTRYP PFNGLPATCHPARAMETERFVPROC) (GLenum pname, const GLfloat *values);
-#endif
-
-#ifndef GL_ARB_texture_buffer_object_rgb32
-#define GL_ARB_texture_buffer_object_rgb32 1
-#endif
-
-#ifndef GL_ARB_transform_feedback2
-#define GL_ARB_transform_feedback2 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBindTransformFeedback (GLenum target, GLuint id);
-GLAPI void APIENTRY glDeleteTransformFeedbacks (GLsizei n, const GLuint *ids);
-GLAPI void APIENTRY glGenTransformFeedbacks (GLsizei n, GLuint *ids);
-GLAPI GLboolean APIENTRY glIsTransformFeedback (GLuint id);
-GLAPI void APIENTRY glPauseTransformFeedback (void);
-GLAPI void APIENTRY glResumeTransformFeedback (void);
-GLAPI void APIENTRY glDrawTransformFeedback (GLenum mode, GLuint id);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBINDTRANSFORMFEEDBACKPROC) (GLenum target, GLuint id);
-typedef void (APIENTRYP PFNGLDELETETRANSFORMFEEDBACKSPROC) (GLsizei n, const GLuint *ids);
-typedef void (APIENTRYP PFNGLGENTRANSFORMFEEDBACKSPROC) (GLsizei n, GLuint *ids);
-typedef GLboolean (APIENTRYP PFNGLISTRANSFORMFEEDBACKPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLPAUSETRANSFORMFEEDBACKPROC) (void);
-typedef void (APIENTRYP PFNGLRESUMETRANSFORMFEEDBACKPROC) (void);
-typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKPROC) (GLenum mode, GLuint id);
-#endif
-
-#ifndef GL_ARB_transform_feedback3
-#define GL_ARB_transform_feedback3 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawTransformFeedbackStream (GLenum mode, GLuint id, GLuint stream);
-GLAPI void APIENTRY glBeginQueryIndexed (GLenum target, GLuint index, GLuint id);
-GLAPI void APIENTRY glEndQueryIndexed (GLenum target, GLuint index);
-GLAPI void APIENTRY glGetQueryIndexediv (GLenum target, GLuint index, GLenum pname, GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKSTREAMPROC) (GLenum mode, GLuint id, GLuint stream);
-typedef void (APIENTRYP PFNGLBEGINQUERYINDEXEDPROC) (GLenum target, GLuint index, GLuint id);
-typedef void (APIENTRYP PFNGLENDQUERYINDEXEDPROC) (GLenum target, GLuint index);
-typedef void (APIENTRYP PFNGLGETQUERYINDEXEDIVPROC) (GLenum target, GLuint index, GLenum pname, GLint *params);
-#endif
-
-#ifndef GL_ARB_ES2_compatibility
-#define GL_ARB_ES2_compatibility 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glReleaseShaderCompiler (void);
-GLAPI void APIENTRY glShaderBinary (GLsizei count, const GLuint *shaders, GLenum binaryformat, const GLvoid *binary, GLsizei length);
-GLAPI void APIENTRY glGetShaderPrecisionFormat (GLenum shadertype, GLenum precisiontype, GLint *range, GLint *precision);
-GLAPI void APIENTRY glDepthRangef (GLclampf n, GLclampf f);
-GLAPI void APIENTRY glClearDepthf (GLclampf d);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLRELEASESHADERCOMPILERPROC) (void);
-typedef void (APIENTRYP PFNGLSHADERBINARYPROC) (GLsizei count, const GLuint *shaders, GLenum binaryformat, const GLvoid *binary, GLsizei length);
-typedef void (APIENTRYP PFNGLGETSHADERPRECISIONFORMATPROC) (GLenum shadertype, GLenum precisiontype, GLint *range, GLint *precision);
-typedef void (APIENTRYP PFNGLDEPTHRANGEFPROC) (GLclampf n, GLclampf f);
-typedef void (APIENTRYP PFNGLCLEARDEPTHFPROC) (GLclampf d);
-#endif
-
-#ifndef GL_ARB_get_program_binary
-#define GL_ARB_get_program_binary 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetProgramBinary (GLuint program, GLsizei bufSize, GLsizei *length, GLenum *binaryFormat, GLvoid *binary);
-GLAPI void APIENTRY glProgramBinary (GLuint program, GLenum binaryFormat, const GLvoid *binary, GLsizei length);
-GLAPI void APIENTRY glProgramParameteri (GLuint program, GLenum pname, GLint value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETPROGRAMBINARYPROC) (GLuint program, GLsizei bufSize, GLsizei *length, GLenum *binaryFormat, GLvoid *binary);
-typedef void (APIENTRYP PFNGLPROGRAMBINARYPROC) (GLuint program, GLenum binaryFormat, const GLvoid *binary, GLsizei length);
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETERIPROC) (GLuint program, GLenum pname, GLint value);
-#endif
-
-#ifndef GL_ARB_separate_shader_objects
-#define GL_ARB_separate_shader_objects 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glUseProgramStages (GLuint pipeline, GLbitfield stages, GLuint program);
-GLAPI void APIENTRY glActiveShaderProgram (GLuint pipeline, GLuint program);
-GLAPI GLuint APIENTRY glCreateShaderProgramv (GLenum type, GLsizei count, const GLchar* *strings);
-GLAPI void APIENTRY glBindProgramPipeline (GLuint pipeline);
-GLAPI void APIENTRY glDeleteProgramPipelines (GLsizei n, const GLuint *pipelines);
-GLAPI void APIENTRY glGenProgramPipelines (GLsizei n, GLuint *pipelines);
-GLAPI GLboolean APIENTRY glIsProgramPipeline (GLuint pipeline);
-GLAPI void APIENTRY glGetProgramPipelineiv (GLuint pipeline, GLenum pname, GLint *params);
-GLAPI void APIENTRY glProgramUniform1i (GLuint program, GLint location, GLint v0);
-GLAPI void APIENTRY glProgramUniform1iv (GLuint program, GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glProgramUniform1f (GLuint program, GLint location, GLfloat v0);
-GLAPI void APIENTRY glProgramUniform1fv (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform1d (GLuint program, GLint location, GLdouble v0);
-GLAPI void APIENTRY glProgramUniform1dv (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniform1ui (GLuint program, GLint location, GLuint v0);
-GLAPI void APIENTRY glProgramUniform1uiv (GLuint program, GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glProgramUniform2i (GLuint program, GLint location, GLint v0, GLint v1);
-GLAPI void APIENTRY glProgramUniform2iv (GLuint program, GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glProgramUniform2f (GLuint program, GLint location, GLfloat v0, GLfloat v1);
-GLAPI void APIENTRY glProgramUniform2fv (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform2d (GLuint program, GLint location, GLdouble v0, GLdouble v1);
-GLAPI void APIENTRY glProgramUniform2dv (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniform2ui (GLuint program, GLint location, GLuint v0, GLuint v1);
-GLAPI void APIENTRY glProgramUniform2uiv (GLuint program, GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glProgramUniform3i (GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
-GLAPI void APIENTRY glProgramUniform3iv (GLuint program, GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glProgramUniform3f (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
-GLAPI void APIENTRY glProgramUniform3fv (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform3d (GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2);
-GLAPI void APIENTRY glProgramUniform3dv (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniform3ui (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
-GLAPI void APIENTRY glProgramUniform3uiv (GLuint program, GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glProgramUniform4i (GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
-GLAPI void APIENTRY glProgramUniform4iv (GLuint program, GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glProgramUniform4f (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-GLAPI void APIENTRY glProgramUniform4fv (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform4d (GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3);
-GLAPI void APIENTRY glProgramUniform4dv (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniform4ui (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-GLAPI void APIENTRY glProgramUniform4uiv (GLuint program, GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glProgramUniformMatrix2fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix3fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix4fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix2dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix3dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix4dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix2x3fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix3x2fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix2x4fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix4x2fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix3x4fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix4x3fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix2x3dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix3x2dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix2x4dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix4x2dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix3x4dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix4x3dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glValidateProgramPipeline (GLuint pipeline);
-GLAPI void APIENTRY glGetProgramPipelineInfoLog (GLuint pipeline, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLUSEPROGRAMSTAGESPROC) (GLuint pipeline, GLbitfield stages, GLuint program);
-typedef void (APIENTRYP PFNGLACTIVESHADERPROGRAMPROC) (GLuint pipeline, GLuint program);
-typedef GLuint (APIENTRYP PFNGLCREATESHADERPROGRAMVPROC) (GLenum type, GLsizei count, const GLchar* *strings);
-typedef void (APIENTRYP PFNGLBINDPROGRAMPIPELINEPROC) (GLuint pipeline);
-typedef void (APIENTRYP PFNGLDELETEPROGRAMPIPELINESPROC) (GLsizei n, const GLuint *pipelines);
-typedef void (APIENTRYP PFNGLGENPROGRAMPIPELINESPROC) (GLsizei n, GLuint *pipelines);
-typedef GLboolean (APIENTRYP PFNGLISPROGRAMPIPELINEPROC) (GLuint pipeline);
-typedef void (APIENTRYP PFNGLGETPROGRAMPIPELINEIVPROC) (GLuint pipeline, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IPROC) (GLuint program, GLint location, GLint v0);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IVPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FPROC) (GLuint program, GLint location, GLfloat v0);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FVPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DPROC) (GLuint program, GLint location, GLdouble v0);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DVPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIPROC) (GLuint program, GLint location, GLuint v0);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIVPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IPROC) (GLuint program, GLint location, GLint v0, GLint v1);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IVPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FVPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DPROC) (GLuint program, GLint location, GLdouble v0, GLdouble v1);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DVPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIPROC) (GLuint program, GLint location, GLuint v0, GLuint v1);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIVPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IPROC) (GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IVPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FVPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DPROC) (GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DVPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIPROC) (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIVPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IPROC) (GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IVPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FVPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DPROC) (GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DVPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIPROC) (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIVPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLVALIDATEPROGRAMPIPELINEPROC) (GLuint pipeline);
-typedef void (APIENTRYP PFNGLGETPROGRAMPIPELINEINFOLOGPROC) (GLuint pipeline, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
-#endif
-
-#ifndef GL_ARB_vertex_attrib_64bit
-#define GL_ARB_vertex_attrib_64bit 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexAttribL1d (GLuint index, GLdouble x);
-GLAPI void APIENTRY glVertexAttribL2d (GLuint index, GLdouble x, GLdouble y);
-GLAPI void APIENTRY glVertexAttribL3d (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glVertexAttribL4d (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glVertexAttribL1dv (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribL2dv (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribL3dv (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribL4dv (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribLPointer (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glGetVertexAttribLdv (GLuint index, GLenum pname, GLdouble *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DPROC) (GLuint index, GLdouble x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DPROC) (GLuint index, GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBLPOINTERPROC) (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLDVPROC) (GLuint index, GLenum pname, GLdouble *params);
-#endif
-
-#ifndef GL_ARB_viewport_array
-#define GL_ARB_viewport_array 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glViewportArrayv (GLuint first, GLsizei count, const GLfloat *v);
-GLAPI void APIENTRY glViewportIndexedf (GLuint index, GLfloat x, GLfloat y, GLfloat w, GLfloat h);
-GLAPI void APIENTRY glViewportIndexedfv (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glScissorArrayv (GLuint first, GLsizei count, const GLint *v);
-GLAPI void APIENTRY glScissorIndexed (GLuint index, GLint left, GLint bottom, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glScissorIndexedv (GLuint index, const GLint *v);
-GLAPI void APIENTRY glDepthRangeArrayv (GLuint first, GLsizei count, const GLclampd *v);
-GLAPI void APIENTRY glDepthRangeIndexed (GLuint index, GLclampd n, GLclampd f);
-GLAPI void APIENTRY glGetFloati_v (GLenum target, GLuint index, GLfloat *data);
-GLAPI void APIENTRY glGetDoublei_v (GLenum target, GLuint index, GLdouble *data);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVIEWPORTARRAYVPROC) (GLuint first, GLsizei count, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVIEWPORTINDEXEDFPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat w, GLfloat h);
-typedef void (APIENTRYP PFNGLVIEWPORTINDEXEDFVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLSCISSORARRAYVPROC) (GLuint first, GLsizei count, const GLint *v);
-typedef void (APIENTRYP PFNGLSCISSORINDEXEDPROC) (GLuint index, GLint left, GLint bottom, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLSCISSORINDEXEDVPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLDEPTHRANGEARRAYVPROC) (GLuint first, GLsizei count, const GLclampd *v);
-typedef void (APIENTRYP PFNGLDEPTHRANGEINDEXEDPROC) (GLuint index, GLclampd n, GLclampd f);
-typedef void (APIENTRYP PFNGLGETFLOATI_VPROC) (GLenum target, GLuint index, GLfloat *data);
-typedef void (APIENTRYP PFNGLGETDOUBLEI_VPROC) (GLenum target, GLuint index, GLdouble *data);
-#endif
-
-#ifndef GL_ARB_cl_event
-#define GL_ARB_cl_event 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLsync APIENTRY glCreateSyncFromCLeventARB (struct _cl_context * context, struct _cl_event * event, GLbitfield flags);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLsync (APIENTRYP PFNGLCREATESYNCFROMCLEVENTARBPROC) (struct _cl_context * context, struct _cl_event * event, GLbitfield flags);
-#endif
-
-#ifndef GL_ARB_debug_output
-#define GL_ARB_debug_output 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDebugMessageControlARB (GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
-GLAPI void APIENTRY glDebugMessageInsertARB (GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *buf);
-GLAPI void APIENTRY glDebugMessageCallbackARB (GLDEBUGPROCARB callback, const GLvoid *userParam);
-GLAPI GLuint APIENTRY glGetDebugMessageLogARB (GLuint count, GLsizei bufsize, GLenum *sources, GLenum *types, GLuint *ids, GLenum *severities, GLsizei *lengths, GLchar *messageLog);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDEBUGMESSAGECONTROLARBPROC) (GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
-typedef void (APIENTRYP PFNGLDEBUGMESSAGEINSERTARBPROC) (GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *buf);
-typedef void (APIENTRYP PFNGLDEBUGMESSAGECALLBACKARBPROC) (GLDEBUGPROCARB callback, const GLvoid *userParam);
-typedef GLuint (APIENTRYP PFNGLGETDEBUGMESSAGELOGARBPROC) (GLuint count, GLsizei bufsize, GLenum *sources, GLenum *types, GLuint *ids, GLenum *severities, GLsizei *lengths, GLchar *messageLog);
-#endif
-
-#ifndef GL_ARB_robustness
-#define GL_ARB_robustness 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLenum APIENTRY glGetGraphicsResetStatusARB (void);
-GLAPI void APIENTRY glGetnMapdvARB (GLenum target, GLenum query, GLsizei bufSize, GLdouble *v);
-GLAPI void APIENTRY glGetnMapfvARB (GLenum target, GLenum query, GLsizei bufSize, GLfloat *v);
-GLAPI void APIENTRY glGetnMapivARB (GLenum target, GLenum query, GLsizei bufSize, GLint *v);
-GLAPI void APIENTRY glGetnPixelMapfvARB (GLenum map, GLsizei bufSize, GLfloat *values);
-GLAPI void APIENTRY glGetnPixelMapuivARB (GLenum map, GLsizei bufSize, GLuint *values);
-GLAPI void APIENTRY glGetnPixelMapusvARB (GLenum map, GLsizei bufSize, GLushort *values);
-GLAPI void APIENTRY glGetnPolygonStippleARB (GLsizei bufSize, GLubyte *pattern);
-GLAPI void APIENTRY glGetnColorTableARB (GLenum target, GLenum format, GLenum type, GLsizei bufSize, GLvoid *table);
-GLAPI void APIENTRY glGetnConvolutionFilterARB (GLenum target, GLenum format, GLenum type, GLsizei bufSize, GLvoid *image);
-GLAPI void APIENTRY glGetnSeparableFilterARB (GLenum target, GLenum format, GLenum type, GLsizei rowBufSize, GLvoid *row, GLsizei columnBufSize, GLvoid *column, GLvoid *span);
-GLAPI void APIENTRY glGetnHistogramARB (GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, GLvoid *values);
-GLAPI void APIENTRY glGetnMinmaxARB (GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, GLvoid *values);
-GLAPI void APIENTRY glGetnTexImageARB (GLenum target, GLint level, GLenum format, GLenum type, GLsizei bufSize, GLvoid *img);
-GLAPI void APIENTRY glReadnPixelsARB (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei bufSize, GLvoid *data);
-GLAPI void APIENTRY glGetnCompressedTexImageARB (GLenum target, GLint lod, GLsizei bufSize, GLvoid *img);
-GLAPI void APIENTRY glGetnUniformfvARB (GLuint program, GLint location, GLsizei bufSize, GLfloat *params);
-GLAPI void APIENTRY glGetnUniformivARB (GLuint program, GLint location, GLsizei bufSize, GLint *params);
-GLAPI void APIENTRY glGetnUniformuivARB (GLuint program, GLint location, GLsizei bufSize, GLuint *params);
-GLAPI void APIENTRY glGetnUniformdvARB (GLuint program, GLint location, GLsizei bufSize, GLdouble *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLenum (APIENTRYP PFNGLGETGRAPHICSRESETSTATUSARBPROC) (void);
-typedef void (APIENTRYP PFNGLGETNMAPDVARBPROC) (GLenum target, GLenum query, GLsizei bufSize, GLdouble *v);
-typedef void (APIENTRYP PFNGLGETNMAPFVARBPROC) (GLenum target, GLenum query, GLsizei bufSize, GLfloat *v);
-typedef void (APIENTRYP PFNGLGETNMAPIVARBPROC) (GLenum target, GLenum query, GLsizei bufSize, GLint *v);
-typedef void (APIENTRYP PFNGLGETNPIXELMAPFVARBPROC) (GLenum map, GLsizei bufSize, GLfloat *values);
-typedef void (APIENTRYP PFNGLGETNPIXELMAPUIVARBPROC) (GLenum map, GLsizei bufSize, GLuint *values);
-typedef void (APIENTRYP PFNGLGETNPIXELMAPUSVARBPROC) (GLenum map, GLsizei bufSize, GLushort *values);
-typedef void (APIENTRYP PFNGLGETNPOLYGONSTIPPLEARBPROC) (GLsizei bufSize, GLubyte *pattern);
-typedef void (APIENTRYP PFNGLGETNCOLORTABLEARBPROC) (GLenum target, GLenum format, GLenum type, GLsizei bufSize, GLvoid *table);
-typedef void (APIENTRYP PFNGLGETNCONVOLUTIONFILTERARBPROC) (GLenum target, GLenum format, GLenum type, GLsizei bufSize, GLvoid *image);
-typedef void (APIENTRYP PFNGLGETNSEPARABLEFILTERARBPROC) (GLenum target, GLenum format, GLenum type, GLsizei rowBufSize, GLvoid *row, GLsizei columnBufSize, GLvoid *column, GLvoid *span);
-typedef void (APIENTRYP PFNGLGETNHISTOGRAMARBPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, GLvoid *values);
-typedef void (APIENTRYP PFNGLGETNMINMAXARBPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, GLvoid *values);
-typedef void (APIENTRYP PFNGLGETNTEXIMAGEARBPROC) (GLenum target, GLint level, GLenum format, GLenum type, GLsizei bufSize, GLvoid *img);
-typedef void (APIENTRYP PFNGLREADNPIXELSARBPROC) (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei bufSize, GLvoid *data);
-typedef void (APIENTRYP PFNGLGETNCOMPRESSEDTEXIMAGEARBPROC) (GLenum target, GLint lod, GLsizei bufSize, GLvoid *img);
-typedef void (APIENTRYP PFNGLGETNUNIFORMFVARBPROC) (GLuint program, GLint location, GLsizei bufSize, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETNUNIFORMIVARBPROC) (GLuint program, GLint location, GLsizei bufSize, GLint *params);
-typedef void (APIENTRYP PFNGLGETNUNIFORMUIVARBPROC) (GLuint program, GLint location, GLsizei bufSize, GLuint *params);
-typedef void (APIENTRYP PFNGLGETNUNIFORMDVARBPROC) (GLuint program, GLint location, GLsizei bufSize, GLdouble *params);
-#endif
-
-#ifndef GL_ARB_shader_stencil_export
-#define GL_ARB_shader_stencil_export 1
-#endif
-
-#ifndef GL_EXT_abgr
-#define GL_EXT_abgr 1
-#endif
-
-#ifndef GL_EXT_blend_color
-#define GL_EXT_blend_color 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendColorEXT (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDCOLOREXTPROC) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
-#endif
-
-#ifndef GL_EXT_polygon_offset
-#define GL_EXT_polygon_offset 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPolygonOffsetEXT (GLfloat factor, GLfloat bias);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPOLYGONOFFSETEXTPROC) (GLfloat factor, GLfloat bias);
-#endif
-
-#ifndef GL_EXT_texture
-#define GL_EXT_texture 1
-#endif
-
-#ifndef GL_EXT_texture3D
-#define GL_EXT_texture3D 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTexImage3DEXT (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glTexSubImage3DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXIMAGE3DEXTPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLTEXSUBIMAGE3DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
-#endif
-
-#ifndef GL_SGIS_texture_filter4
-#define GL_SGIS_texture_filter4 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetTexFilterFuncSGIS (GLenum target, GLenum filter, GLfloat *weights);
-GLAPI void APIENTRY glTexFilterFuncSGIS (GLenum target, GLenum filter, GLsizei n, const GLfloat *weights);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETTEXFILTERFUNCSGISPROC) (GLenum target, GLenum filter, GLfloat *weights);
-typedef void (APIENTRYP PFNGLTEXFILTERFUNCSGISPROC) (GLenum target, GLenum filter, GLsizei n, const GLfloat *weights);
-#endif
-
-#ifndef GL_EXT_subtexture
-#define GL_EXT_subtexture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTexSubImage1DEXT (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glTexSubImage2DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXSUBIMAGE1DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLTEXSUBIMAGE2DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
-#endif
-
-#ifndef GL_EXT_copy_texture
-#define GL_EXT_copy_texture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glCopyTexImage1DEXT (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
-GLAPI void APIENTRY glCopyTexImage2DEXT (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
-GLAPI void APIENTRY glCopyTexSubImage1DEXT (GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
-GLAPI void APIENTRY glCopyTexSubImage2DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glCopyTexSubImage3DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOPYTEXIMAGE1DEXTPROC) (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
-typedef void (APIENTRYP PFNGLCOPYTEXIMAGE2DEXTPROC) (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
-typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE1DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
-typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE2DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE3DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-#endif
-
-#ifndef GL_EXT_histogram
-#define GL_EXT_histogram 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetHistogramEXT (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
-GLAPI void APIENTRY glGetHistogramParameterfvEXT (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetHistogramParameterivEXT (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetMinmaxEXT (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
-GLAPI void APIENTRY glGetMinmaxParameterfvEXT (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetMinmaxParameterivEXT (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glHistogramEXT (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
-GLAPI void APIENTRY glMinmaxEXT (GLenum target, GLenum internalformat, GLboolean sink);
-GLAPI void APIENTRY glResetHistogramEXT (GLenum target);
-GLAPI void APIENTRY glResetMinmaxEXT (GLenum target);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETHISTOGRAMEXTPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
-typedef void (APIENTRYP PFNGLGETHISTOGRAMPARAMETERFVEXTPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETHISTOGRAMPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETMINMAXEXTPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
-typedef void (APIENTRYP PFNGLGETMINMAXPARAMETERFVEXTPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETMINMAXPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLHISTOGRAMEXTPROC) (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
-typedef void (APIENTRYP PFNGLMINMAXEXTPROC) (GLenum target, GLenum internalformat, GLboolean sink);
-typedef void (APIENTRYP PFNGLRESETHISTOGRAMEXTPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLRESETMINMAXEXTPROC) (GLenum target);
-#endif
-
-#ifndef GL_EXT_convolution
-#define GL_EXT_convolution 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glConvolutionFilter1DEXT (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
-GLAPI void APIENTRY glConvolutionFilter2DEXT (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
-GLAPI void APIENTRY glConvolutionParameterfEXT (GLenum target, GLenum pname, GLfloat params);
-GLAPI void APIENTRY glConvolutionParameterfvEXT (GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glConvolutionParameteriEXT (GLenum target, GLenum pname, GLint params);
-GLAPI void APIENTRY glConvolutionParameterivEXT (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glCopyConvolutionFilter1DEXT (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
-GLAPI void APIENTRY glCopyConvolutionFilter2DEXT (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glGetConvolutionFilterEXT (GLenum target, GLenum format, GLenum type, GLvoid *image);
-GLAPI void APIENTRY glGetConvolutionParameterfvEXT (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetConvolutionParameterivEXT (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetSeparableFilterEXT (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
-GLAPI void APIENTRY glSeparableFilter2DEXT (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCONVOLUTIONFILTER1DEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
-typedef void (APIENTRYP PFNGLCONVOLUTIONFILTER2DEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
-typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERFEXTPROC) (GLenum target, GLenum pname, GLfloat params);
-typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERFVEXTPROC) (GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERIEXTPROC) (GLenum target, GLenum pname, GLint params);
-typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERIVEXTPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLCOPYCONVOLUTIONFILTER1DEXTPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
-typedef void (APIENTRYP PFNGLCOPYCONVOLUTIONFILTER2DEXTPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLGETCONVOLUTIONFILTEREXTPROC) (GLenum target, GLenum format, GLenum type, GLvoid *image);
-typedef void (APIENTRYP PFNGLGETCONVOLUTIONPARAMETERFVEXTPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETCONVOLUTIONPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETSEPARABLEFILTEREXTPROC) (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
-typedef void (APIENTRYP PFNGLSEPARABLEFILTER2DEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
-#endif
-
-#ifndef GL_SGI_color_matrix
-#define GL_SGI_color_matrix 1
-#endif
-
-#ifndef GL_SGI_color_table
-#define GL_SGI_color_table 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glColorTableSGI (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
-GLAPI void APIENTRY glColorTableParameterfvSGI (GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glColorTableParameterivSGI (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glCopyColorTableSGI (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
-GLAPI void APIENTRY glGetColorTableSGI (GLenum target, GLenum format, GLenum type, GLvoid *table);
-GLAPI void APIENTRY glGetColorTableParameterfvSGI (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetColorTableParameterivSGI (GLenum target, GLenum pname, GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOLORTABLESGIPROC) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
-typedef void (APIENTRYP PFNGLCOLORTABLEPARAMETERFVSGIPROC) (GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLCOLORTABLEPARAMETERIVSGIPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLCOPYCOLORTABLESGIPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
-typedef void (APIENTRYP PFNGLGETCOLORTABLESGIPROC) (GLenum target, GLenum format, GLenum type, GLvoid *table);
-typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERFVSGIPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERIVSGIPROC) (GLenum target, GLenum pname, GLint *params);
-#endif
-
-#ifndef GL_SGIX_pixel_texture
-#define GL_SGIX_pixel_texture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPixelTexGenSGIX (GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPIXELTEXGENSGIXPROC) (GLenum mode);
-#endif
-
-#ifndef GL_SGIS_pixel_texture
-#define GL_SGIS_pixel_texture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPixelTexGenParameteriSGIS (GLenum pname, GLint param);
-GLAPI void APIENTRY glPixelTexGenParameterivSGIS (GLenum pname, const GLint *params);
-GLAPI void APIENTRY glPixelTexGenParameterfSGIS (GLenum pname, GLfloat param);
-GLAPI void APIENTRY glPixelTexGenParameterfvSGIS (GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glGetPixelTexGenParameterivSGIS (GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetPixelTexGenParameterfvSGIS (GLenum pname, GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPIXELTEXGENPARAMETERISGISPROC) (GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLPIXELTEXGENPARAMETERIVSGISPROC) (GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLPIXELTEXGENPARAMETERFSGISPROC) (GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLPIXELTEXGENPARAMETERFVSGISPROC) (GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLGETPIXELTEXGENPARAMETERIVSGISPROC) (GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETPIXELTEXGENPARAMETERFVSGISPROC) (GLenum pname, GLfloat *params);
-#endif
-
-#ifndef GL_SGIS_texture4D
-#define GL_SGIS_texture4D 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTexImage4DSGIS (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLsizei size4d, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glTexSubImage4DSGIS (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint woffset, GLsizei width, GLsizei height, GLsizei depth, GLsizei size4d, GLenum format, GLenum type, const GLvoid *pixels);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXIMAGE4DSGISPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLsizei size4d, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLTEXSUBIMAGE4DSGISPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint woffset, GLsizei width, GLsizei height, GLsizei depth, GLsizei size4d, GLenum format, GLenum type, const GLvoid *pixels);
-#endif
-
-#ifndef GL_SGI_texture_color_table
-#define GL_SGI_texture_color_table 1
-#endif
-
-#ifndef GL_EXT_cmyka
-#define GL_EXT_cmyka 1
-#endif
-
-#ifndef GL_EXT_texture_object
-#define GL_EXT_texture_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLboolean APIENTRY glAreTexturesResidentEXT (GLsizei n, const GLuint *textures, GLboolean *residences);
-GLAPI void APIENTRY glBindTextureEXT (GLenum target, GLuint texture);
-GLAPI void APIENTRY glDeleteTexturesEXT (GLsizei n, const GLuint *textures);
-GLAPI void APIENTRY glGenTexturesEXT (GLsizei n, GLuint *textures);
-GLAPI GLboolean APIENTRY glIsTextureEXT (GLuint texture);
-GLAPI void APIENTRY glPrioritizeTexturesEXT (GLsizei n, const GLuint *textures, const GLclampf *priorities);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLboolean (APIENTRYP PFNGLARETEXTURESRESIDENTEXTPROC) (GLsizei n, const GLuint *textures, GLboolean *residences);
-typedef void (APIENTRYP PFNGLBINDTEXTUREEXTPROC) (GLenum target, GLuint texture);
-typedef void (APIENTRYP PFNGLDELETETEXTURESEXTPROC) (GLsizei n, const GLuint *textures);
-typedef void (APIENTRYP PFNGLGENTEXTURESEXTPROC) (GLsizei n, GLuint *textures);
-typedef GLboolean (APIENTRYP PFNGLISTEXTUREEXTPROC) (GLuint texture);
-typedef void (APIENTRYP PFNGLPRIORITIZETEXTURESEXTPROC) (GLsizei n, const GLuint *textures, const GLclampf *priorities);
-#endif
-
-#ifndef GL_SGIS_detail_texture
-#define GL_SGIS_detail_texture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDetailTexFuncSGIS (GLenum target, GLsizei n, const GLfloat *points);
-GLAPI void APIENTRY glGetDetailTexFuncSGIS (GLenum target, GLfloat *points);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDETAILTEXFUNCSGISPROC) (GLenum target, GLsizei n, const GLfloat *points);
-typedef void (APIENTRYP PFNGLGETDETAILTEXFUNCSGISPROC) (GLenum target, GLfloat *points);
-#endif
-
-#ifndef GL_SGIS_sharpen_texture
-#define GL_SGIS_sharpen_texture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glSharpenTexFuncSGIS (GLenum target, GLsizei n, const GLfloat *points);
-GLAPI void APIENTRY glGetSharpenTexFuncSGIS (GLenum target, GLfloat *points);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSHARPENTEXFUNCSGISPROC) (GLenum target, GLsizei n, const GLfloat *points);
-typedef void (APIENTRYP PFNGLGETSHARPENTEXFUNCSGISPROC) (GLenum target, GLfloat *points);
-#endif
-
-#ifndef GL_EXT_packed_pixels
-#define GL_EXT_packed_pixels 1
-#endif
-
-#ifndef GL_SGIS_texture_lod
-#define GL_SGIS_texture_lod 1
-#endif
-
-#ifndef GL_SGIS_multisample
-#define GL_SGIS_multisample 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glSampleMaskSGIS (GLclampf value, GLboolean invert);
-GLAPI void APIENTRY glSamplePatternSGIS (GLenum pattern);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSAMPLEMASKSGISPROC) (GLclampf value, GLboolean invert);
-typedef void (APIENTRYP PFNGLSAMPLEPATTERNSGISPROC) (GLenum pattern);
-#endif
-
-#ifndef GL_EXT_rescale_normal
-#define GL_EXT_rescale_normal 1
-#endif
-
-#ifndef GL_EXT_vertex_array
-#define GL_EXT_vertex_array 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glArrayElementEXT (GLint i);
-GLAPI void APIENTRY glColorPointerEXT (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-GLAPI void APIENTRY glDrawArraysEXT (GLenum mode, GLint first, GLsizei count);
-GLAPI void APIENTRY glEdgeFlagPointerEXT (GLsizei stride, GLsizei count, const GLboolean *pointer);
-GLAPI void APIENTRY glGetPointervEXT (GLenum pname, GLvoid* *params);
-GLAPI void APIENTRY glIndexPointerEXT (GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-GLAPI void APIENTRY glNormalPointerEXT (GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-GLAPI void APIENTRY glTexCoordPointerEXT (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-GLAPI void APIENTRY glVertexPointerEXT (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLARRAYELEMENTEXTPROC) (GLint i);
-typedef void (APIENTRYP PFNGLCOLORPOINTEREXTPROC) (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLDRAWARRAYSEXTPROC) (GLenum mode, GLint first, GLsizei count);
-typedef void (APIENTRYP PFNGLEDGEFLAGPOINTEREXTPROC) (GLsizei stride, GLsizei count, const GLboolean *pointer);
-typedef void (APIENTRYP PFNGLGETPOINTERVEXTPROC) (GLenum pname, GLvoid* *params);
-typedef void (APIENTRYP PFNGLINDEXPOINTEREXTPROC) (GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLNORMALPOINTEREXTPROC) (GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLTEXCOORDPOINTEREXTPROC) (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLVERTEXPOINTEREXTPROC) (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
-#endif
-
-#ifndef GL_EXT_misc_attribute
-#define GL_EXT_misc_attribute 1
-#endif
-
-#ifndef GL_SGIS_generate_mipmap
-#define GL_SGIS_generate_mipmap 1
-#endif
-
-#ifndef GL_SGIX_clipmap
-#define GL_SGIX_clipmap 1
-#endif
-
-#ifndef GL_SGIX_shadow
-#define GL_SGIX_shadow 1
-#endif
-
-#ifndef GL_SGIS_texture_edge_clamp
-#define GL_SGIS_texture_edge_clamp 1
-#endif
-
-#ifndef GL_SGIS_texture_border_clamp
-#define GL_SGIS_texture_border_clamp 1
-#endif
-
-#ifndef GL_EXT_blend_minmax
-#define GL_EXT_blend_minmax 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendEquationEXT (GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDEQUATIONEXTPROC) (GLenum mode);
-#endif
-
-#ifndef GL_EXT_blend_subtract
-#define GL_EXT_blend_subtract 1
-#endif
-
-#ifndef GL_EXT_blend_logic_op
-#define GL_EXT_blend_logic_op 1
-#endif
-
-#ifndef GL_SGIX_interlace
-#define GL_SGIX_interlace 1
-#endif
-
-#ifndef GL_SGIX_pixel_tiles
-#define GL_SGIX_pixel_tiles 1
-#endif
-
-#ifndef GL_SGIX_texture_select
-#define GL_SGIX_texture_select 1
-#endif
-
-#ifndef GL_SGIX_sprite
-#define GL_SGIX_sprite 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glSpriteParameterfSGIX (GLenum pname, GLfloat param);
-GLAPI void APIENTRY glSpriteParameterfvSGIX (GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glSpriteParameteriSGIX (GLenum pname, GLint param);
-GLAPI void APIENTRY glSpriteParameterivSGIX (GLenum pname, const GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSPRITEPARAMETERFSGIXPROC) (GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLSPRITEPARAMETERFVSGIXPROC) (GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLSPRITEPARAMETERISGIXPROC) (GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLSPRITEPARAMETERIVSGIXPROC) (GLenum pname, const GLint *params);
-#endif
-
-#ifndef GL_SGIX_texture_multi_buffer
-#define GL_SGIX_texture_multi_buffer 1
-#endif
-
-#ifndef GL_EXT_point_parameters
-#define GL_EXT_point_parameters 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPointParameterfEXT (GLenum pname, GLfloat param);
-GLAPI void APIENTRY glPointParameterfvEXT (GLenum pname, const GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPOINTPARAMETERFEXTPROC) (GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLPOINTPARAMETERFVEXTPROC) (GLenum pname, const GLfloat *params);
-#endif
-
-#ifndef GL_SGIS_point_parameters
-#define GL_SGIS_point_parameters 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPointParameterfSGIS (GLenum pname, GLfloat param);
-GLAPI void APIENTRY glPointParameterfvSGIS (GLenum pname, const GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPOINTPARAMETERFSGISPROC) (GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLPOINTPARAMETERFVSGISPROC) (GLenum pname, const GLfloat *params);
-#endif
-
-#ifndef GL_SGIX_instruments
-#define GL_SGIX_instruments 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLint APIENTRY glGetInstrumentsSGIX (void);
-GLAPI void APIENTRY glInstrumentsBufferSGIX (GLsizei size, GLint *buffer);
-GLAPI GLint APIENTRY glPollInstrumentsSGIX (GLint *marker_p);
-GLAPI void APIENTRY glReadInstrumentsSGIX (GLint marker);
-GLAPI void APIENTRY glStartInstrumentsSGIX (void);
-GLAPI void APIENTRY glStopInstrumentsSGIX (GLint marker);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLint (APIENTRYP PFNGLGETINSTRUMENTSSGIXPROC) (void);
-typedef void (APIENTRYP PFNGLINSTRUMENTSBUFFERSGIXPROC) (GLsizei size, GLint *buffer);
-typedef GLint (APIENTRYP PFNGLPOLLINSTRUMENTSSGIXPROC) (GLint *marker_p);
-typedef void (APIENTRYP PFNGLREADINSTRUMENTSSGIXPROC) (GLint marker);
-typedef void (APIENTRYP PFNGLSTARTINSTRUMENTSSGIXPROC) (void);
-typedef void (APIENTRYP PFNGLSTOPINSTRUMENTSSGIXPROC) (GLint marker);
-#endif
-
-#ifndef GL_SGIX_texture_scale_bias
-#define GL_SGIX_texture_scale_bias 1
-#endif
-
-#ifndef GL_SGIX_framezoom
-#define GL_SGIX_framezoom 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFrameZoomSGIX (GLint factor);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFRAMEZOOMSGIXPROC) (GLint factor);
-#endif
-
-#ifndef GL_SGIX_tag_sample_buffer
-#define GL_SGIX_tag_sample_buffer 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTagSampleBufferSGIX (void);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTAGSAMPLEBUFFERSGIXPROC) (void);
-#endif
-
-#ifndef GL_SGIX_polynomial_ffd
-#define GL_SGIX_polynomial_ffd 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDeformationMap3dSGIX (GLenum target, GLdouble u1, GLdouble u2, GLint ustride, GLint uorder, GLdouble v1, GLdouble v2, GLint vstride, GLint vorder, GLdouble w1, GLdouble w2, GLint wstride, GLint worder, const GLdouble *points);
-GLAPI void APIENTRY glDeformationMap3fSGIX (GLenum target, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder, GLfloat v1, GLfloat v2, GLint vstride, GLint vorder, GLfloat w1, GLfloat w2, GLint wstride, GLint worder, const GLfloat *points);
-GLAPI void APIENTRY glDeformSGIX (GLbitfield mask);
-GLAPI void APIENTRY glLoadIdentityDeformationMapSGIX (GLbitfield mask);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDEFORMATIONMAP3DSGIXPROC) (GLenum target, GLdouble u1, GLdouble u2, GLint ustride, GLint uorder, GLdouble v1, GLdouble v2, GLint vstride, GLint vorder, GLdouble w1, GLdouble w2, GLint wstride, GLint worder, const GLdouble *points);
-typedef void (APIENTRYP PFNGLDEFORMATIONMAP3FSGIXPROC) (GLenum target, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder, GLfloat v1, GLfloat v2, GLint vstride, GLint vorder, GLfloat w1, GLfloat w2, GLint wstride, GLint worder, const GLfloat *points);
-typedef void (APIENTRYP PFNGLDEFORMSGIXPROC) (GLbitfield mask);
-typedef void (APIENTRYP PFNGLLOADIDENTITYDEFORMATIONMAPSGIXPROC) (GLbitfield mask);
-#endif
-
-#ifndef GL_SGIX_reference_plane
-#define GL_SGIX_reference_plane 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glReferencePlaneSGIX (const GLdouble *equation);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLREFERENCEPLANESGIXPROC) (const GLdouble *equation);
-#endif
-
-#ifndef GL_SGIX_flush_raster
-#define GL_SGIX_flush_raster 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFlushRasterSGIX (void);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFLUSHRASTERSGIXPROC) (void);
-#endif
-
-#ifndef GL_SGIX_depth_texture
-#define GL_SGIX_depth_texture 1
-#endif
-
-#ifndef GL_SGIS_fog_function
-#define GL_SGIS_fog_function 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFogFuncSGIS (GLsizei n, const GLfloat *points);
-GLAPI void APIENTRY glGetFogFuncSGIS (GLfloat *points);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFOGFUNCSGISPROC) (GLsizei n, const GLfloat *points);
-typedef void (APIENTRYP PFNGLGETFOGFUNCSGISPROC) (GLfloat *points);
-#endif
-
-#ifndef GL_SGIX_fog_offset
-#define GL_SGIX_fog_offset 1
-#endif
-
-#ifndef GL_HP_image_transform
-#define GL_HP_image_transform 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glImageTransformParameteriHP (GLenum target, GLenum pname, GLint param);
-GLAPI void APIENTRY glImageTransformParameterfHP (GLenum target, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glImageTransformParameterivHP (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glImageTransformParameterfvHP (GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glGetImageTransformParameterivHP (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetImageTransformParameterfvHP (GLenum target, GLenum pname, GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLIMAGETRANSFORMPARAMETERIHPPROC) (GLenum target, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLIMAGETRANSFORMPARAMETERFHPPROC) (GLenum target, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLIMAGETRANSFORMPARAMETERIVHPPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLIMAGETRANSFORMPARAMETERFVHPPROC) (GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLGETIMAGETRANSFORMPARAMETERIVHPPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETIMAGETRANSFORMPARAMETERFVHPPROC) (GLenum target, GLenum pname, GLfloat *params);
-#endif
-
-#ifndef GL_HP_convolution_border_modes
-#define GL_HP_convolution_border_modes 1
-#endif
-
-#ifndef GL_SGIX_texture_add_env
-#define GL_SGIX_texture_add_env 1
-#endif
-
-#ifndef GL_EXT_color_subtable
-#define GL_EXT_color_subtable 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glColorSubTableEXT (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
-GLAPI void APIENTRY glCopyColorSubTableEXT (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOLORSUBTABLEEXTPROC) (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
-typedef void (APIENTRYP PFNGLCOPYCOLORSUBTABLEEXTPROC) (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
-#endif
-
-#ifndef GL_PGI_vertex_hints
-#define GL_PGI_vertex_hints 1
-#endif
-
-#ifndef GL_PGI_misc_hints
-#define GL_PGI_misc_hints 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glHintPGI (GLenum target, GLint mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLHINTPGIPROC) (GLenum target, GLint mode);
-#endif
-
-#ifndef GL_EXT_paletted_texture
-#define GL_EXT_paletted_texture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glColorTableEXT (GLenum target, GLenum internalFormat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
-GLAPI void APIENTRY glGetColorTableEXT (GLenum target, GLenum format, GLenum type, GLvoid *data);
-GLAPI void APIENTRY glGetColorTableParameterivEXT (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetColorTableParameterfvEXT (GLenum target, GLenum pname, GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOLORTABLEEXTPROC) (GLenum target, GLenum internalFormat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
-typedef void (APIENTRYP PFNGLGETCOLORTABLEEXTPROC) (GLenum target, GLenum format, GLenum type, GLvoid *data);
-typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERFVEXTPROC) (GLenum target, GLenum pname, GLfloat *params);
-#endif
-
-#ifndef GL_EXT_clip_volume_hint
-#define GL_EXT_clip_volume_hint 1
-#endif
-
-#ifndef GL_SGIX_list_priority
-#define GL_SGIX_list_priority 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetListParameterfvSGIX (GLuint list, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetListParameterivSGIX (GLuint list, GLenum pname, GLint *params);
-GLAPI void APIENTRY glListParameterfSGIX (GLuint list, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glListParameterfvSGIX (GLuint list, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glListParameteriSGIX (GLuint list, GLenum pname, GLint param);
-GLAPI void APIENTRY glListParameterivSGIX (GLuint list, GLenum pname, const GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETLISTPARAMETERFVSGIXPROC) (GLuint list, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETLISTPARAMETERIVSGIXPROC) (GLuint list, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLLISTPARAMETERFSGIXPROC) (GLuint list, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLLISTPARAMETERFVSGIXPROC) (GLuint list, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLLISTPARAMETERISGIXPROC) (GLuint list, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLLISTPARAMETERIVSGIXPROC) (GLuint list, GLenum pname, const GLint *params);
-#endif
-
-#ifndef GL_SGIX_ir_instrument1
-#define GL_SGIX_ir_instrument1 1
-#endif
-
-#ifndef GL_SGIX_calligraphic_fragment
-#define GL_SGIX_calligraphic_fragment 1
-#endif
-
-#ifndef GL_SGIX_texture_lod_bias
-#define GL_SGIX_texture_lod_bias 1
-#endif
-
-#ifndef GL_SGIX_shadow_ambient
-#define GL_SGIX_shadow_ambient 1
-#endif
-
-#ifndef GL_EXT_index_texture
-#define GL_EXT_index_texture 1
-#endif
-
-#ifndef GL_EXT_index_material
-#define GL_EXT_index_material 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glIndexMaterialEXT (GLenum face, GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLINDEXMATERIALEXTPROC) (GLenum face, GLenum mode);
-#endif
-
-#ifndef GL_EXT_index_func
-#define GL_EXT_index_func 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glIndexFuncEXT (GLenum func, GLclampf ref);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLINDEXFUNCEXTPROC) (GLenum func, GLclampf ref);
-#endif
-
-#ifndef GL_EXT_index_array_formats
-#define GL_EXT_index_array_formats 1
-#endif
-
-#ifndef GL_EXT_compiled_vertex_array
-#define GL_EXT_compiled_vertex_array 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glLockArraysEXT (GLint first, GLsizei count);
-GLAPI void APIENTRY glUnlockArraysEXT (void);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLLOCKARRAYSEXTPROC) (GLint first, GLsizei count);
-typedef void (APIENTRYP PFNGLUNLOCKARRAYSEXTPROC) (void);
-#endif
-
-#ifndef GL_EXT_cull_vertex
-#define GL_EXT_cull_vertex 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glCullParameterdvEXT (GLenum pname, GLdouble *params);
-GLAPI void APIENTRY glCullParameterfvEXT (GLenum pname, GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCULLPARAMETERDVEXTPROC) (GLenum pname, GLdouble *params);
-typedef void (APIENTRYP PFNGLCULLPARAMETERFVEXTPROC) (GLenum pname, GLfloat *params);
-#endif
-
-#ifndef GL_SGIX_ycrcb
-#define GL_SGIX_ycrcb 1
-#endif
-
-#ifndef GL_SGIX_fragment_lighting
-#define GL_SGIX_fragment_lighting 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFragmentColorMaterialSGIX (GLenum face, GLenum mode);
-GLAPI void APIENTRY glFragmentLightfSGIX (GLenum light, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glFragmentLightfvSGIX (GLenum light, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glFragmentLightiSGIX (GLenum light, GLenum pname, GLint param);
-GLAPI void APIENTRY glFragmentLightivSGIX (GLenum light, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glFragmentLightModelfSGIX (GLenum pname, GLfloat param);
-GLAPI void APIENTRY glFragmentLightModelfvSGIX (GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glFragmentLightModeliSGIX (GLenum pname, GLint param);
-GLAPI void APIENTRY glFragmentLightModelivSGIX (GLenum pname, const GLint *params);
-GLAPI void APIENTRY glFragmentMaterialfSGIX (GLenum face, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glFragmentMaterialfvSGIX (GLenum face, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glFragmentMaterialiSGIX (GLenum face, GLenum pname, GLint param);
-GLAPI void APIENTRY glFragmentMaterialivSGIX (GLenum face, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glGetFragmentLightfvSGIX (GLenum light, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetFragmentLightivSGIX (GLenum light, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetFragmentMaterialfvSGIX (GLenum face, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetFragmentMaterialivSGIX (GLenum face, GLenum pname, GLint *params);
-GLAPI void APIENTRY glLightEnviSGIX (GLenum pname, GLint param);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFRAGMENTCOLORMATERIALSGIXPROC) (GLenum face, GLenum mode);
-typedef void (APIENTRYP PFNGLFRAGMENTLIGHTFSGIXPROC) (GLenum light, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLFRAGMENTLIGHTFVSGIXPROC) (GLenum light, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLFRAGMENTLIGHTISGIXPROC) (GLenum light, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLFRAGMENTLIGHTIVSGIXPROC) (GLenum light, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLFRAGMENTLIGHTMODELFSGIXPROC) (GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLFRAGMENTLIGHTMODELFVSGIXPROC) (GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLFRAGMENTLIGHTMODELISGIXPROC) (GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLFRAGMENTLIGHTMODELIVSGIXPROC) (GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLFRAGMENTMATERIALFSGIXPROC) (GLenum face, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLFRAGMENTMATERIALFVSGIXPROC) (GLenum face, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLFRAGMENTMATERIALISGIXPROC) (GLenum face, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLFRAGMENTMATERIALIVSGIXPROC) (GLenum face, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLGETFRAGMENTLIGHTFVSGIXPROC) (GLenum light, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETFRAGMENTLIGHTIVSGIXPROC) (GLenum light, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETFRAGMENTMATERIALFVSGIXPROC) (GLenum face, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETFRAGMENTMATERIALIVSGIXPROC) (GLenum face, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLLIGHTENVISGIXPROC) (GLenum pname, GLint param);
-#endif
-
-#ifndef GL_IBM_rasterpos_clip
-#define GL_IBM_rasterpos_clip 1
-#endif
-
-#ifndef GL_HP_texture_lighting
-#define GL_HP_texture_lighting 1
-#endif
-
-#ifndef GL_EXT_draw_range_elements
-#define GL_EXT_draw_range_elements 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawRangeElementsEXT (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTSEXTPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
-#endif
-
-#ifndef GL_WIN_phong_shading
-#define GL_WIN_phong_shading 1
-#endif
-
-#ifndef GL_WIN_specular_fog
-#define GL_WIN_specular_fog 1
-#endif
-
-#ifndef GL_EXT_light_texture
-#define GL_EXT_light_texture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glApplyTextureEXT (GLenum mode);
-GLAPI void APIENTRY glTextureLightEXT (GLenum pname);
-GLAPI void APIENTRY glTextureMaterialEXT (GLenum face, GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLAPPLYTEXTUREEXTPROC) (GLenum mode);
-typedef void (APIENTRYP PFNGLTEXTURELIGHTEXTPROC) (GLenum pname);
-typedef void (APIENTRYP PFNGLTEXTUREMATERIALEXTPROC) (GLenum face, GLenum mode);
-#endif
-
-#ifndef GL_SGIX_blend_alpha_minmax
-#define GL_SGIX_blend_alpha_minmax 1
-#endif
-
-#ifndef GL_EXT_bgra
-#define GL_EXT_bgra 1
-#endif
-
-#ifndef GL_SGIX_async
-#define GL_SGIX_async 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glAsyncMarkerSGIX (GLuint marker);
-GLAPI GLint APIENTRY glFinishAsyncSGIX (GLuint *markerp);
-GLAPI GLint APIENTRY glPollAsyncSGIX (GLuint *markerp);
-GLAPI GLuint APIENTRY glGenAsyncMarkersSGIX (GLsizei range);
-GLAPI void APIENTRY glDeleteAsyncMarkersSGIX (GLuint marker, GLsizei range);
-GLAPI GLboolean APIENTRY glIsAsyncMarkerSGIX (GLuint marker);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLASYNCMARKERSGIXPROC) (GLuint marker);
-typedef GLint (APIENTRYP PFNGLFINISHASYNCSGIXPROC) (GLuint *markerp);
-typedef GLint (APIENTRYP PFNGLPOLLASYNCSGIXPROC) (GLuint *markerp);
-typedef GLuint (APIENTRYP PFNGLGENASYNCMARKERSSGIXPROC) (GLsizei range);
-typedef void (APIENTRYP PFNGLDELETEASYNCMARKERSSGIXPROC) (GLuint marker, GLsizei range);
-typedef GLboolean (APIENTRYP PFNGLISASYNCMARKERSGIXPROC) (GLuint marker);
-#endif
-
-#ifndef GL_SGIX_async_pixel
-#define GL_SGIX_async_pixel 1
-#endif
-
-#ifndef GL_SGIX_async_histogram
-#define GL_SGIX_async_histogram 1
-#endif
-
-#ifndef GL_INTEL_parallel_arrays
-#define GL_INTEL_parallel_arrays 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexPointervINTEL (GLint size, GLenum type, const GLvoid* *pointer);
-GLAPI void APIENTRY glNormalPointervINTEL (GLenum type, const GLvoid* *pointer);
-GLAPI void APIENTRY glColorPointervINTEL (GLint size, GLenum type, const GLvoid* *pointer);
-GLAPI void APIENTRY glTexCoordPointervINTEL (GLint size, GLenum type, const GLvoid* *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXPOINTERVINTELPROC) (GLint size, GLenum type, const GLvoid* *pointer);
-typedef void (APIENTRYP PFNGLNORMALPOINTERVINTELPROC) (GLenum type, const GLvoid* *pointer);
-typedef void (APIENTRYP PFNGLCOLORPOINTERVINTELPROC) (GLint size, GLenum type, const GLvoid* *pointer);
-typedef void (APIENTRYP PFNGLTEXCOORDPOINTERVINTELPROC) (GLint size, GLenum type, const GLvoid* *pointer);
-#endif
-
-#ifndef GL_HP_occlusion_test
-#define GL_HP_occlusion_test 1
-#endif
-
-#ifndef GL_EXT_pixel_transform
-#define GL_EXT_pixel_transform 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPixelTransformParameteriEXT (GLenum target, GLenum pname, GLint param);
-GLAPI void APIENTRY glPixelTransformParameterfEXT (GLenum target, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glPixelTransformParameterivEXT (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glPixelTransformParameterfvEXT (GLenum target, GLenum pname, const GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPIXELTRANSFORMPARAMETERIEXTPROC) (GLenum target, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLPIXELTRANSFORMPARAMETERFEXTPROC) (GLenum target, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLPIXELTRANSFORMPARAMETERIVEXTPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLPIXELTRANSFORMPARAMETERFVEXTPROC) (GLenum target, GLenum pname, const GLfloat *params);
-#endif
-
-#ifndef GL_EXT_pixel_transform_color_table
-#define GL_EXT_pixel_transform_color_table 1
-#endif
-
-#ifndef GL_EXT_shared_texture_palette
-#define GL_EXT_shared_texture_palette 1
-#endif
-
-#ifndef GL_EXT_separate_specular_color
-#define GL_EXT_separate_specular_color 1
-#endif
-
-#ifndef GL_EXT_secondary_color
-#define GL_EXT_secondary_color 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glSecondaryColor3bEXT (GLbyte red, GLbyte green, GLbyte blue);
-GLAPI void APIENTRY glSecondaryColor3bvEXT (const GLbyte *v);
-GLAPI void APIENTRY glSecondaryColor3dEXT (GLdouble red, GLdouble green, GLdouble blue);
-GLAPI void APIENTRY glSecondaryColor3dvEXT (const GLdouble *v);
-GLAPI void APIENTRY glSecondaryColor3fEXT (GLfloat red, GLfloat green, GLfloat blue);
-GLAPI void APIENTRY glSecondaryColor3fvEXT (const GLfloat *v);
-GLAPI void APIENTRY glSecondaryColor3iEXT (GLint red, GLint green, GLint blue);
-GLAPI void APIENTRY glSecondaryColor3ivEXT (const GLint *v);
-GLAPI void APIENTRY glSecondaryColor3sEXT (GLshort red, GLshort green, GLshort blue);
-GLAPI void APIENTRY glSecondaryColor3svEXT (const GLshort *v);
-GLAPI void APIENTRY glSecondaryColor3ubEXT (GLubyte red, GLubyte green, GLubyte blue);
-GLAPI void APIENTRY glSecondaryColor3ubvEXT (const GLubyte *v);
-GLAPI void APIENTRY glSecondaryColor3uiEXT (GLuint red, GLuint green, GLuint blue);
-GLAPI void APIENTRY glSecondaryColor3uivEXT (const GLuint *v);
-GLAPI void APIENTRY glSecondaryColor3usEXT (GLushort red, GLushort green, GLushort blue);
-GLAPI void APIENTRY glSecondaryColor3usvEXT (const GLushort *v);
-GLAPI void APIENTRY glSecondaryColorPointerEXT (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3BEXTPROC) (GLbyte red, GLbyte green, GLbyte blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3BVEXTPROC) (const GLbyte *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3DEXTPROC) (GLdouble red, GLdouble green, GLdouble blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3DVEXTPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3FEXTPROC) (GLfloat red, GLfloat green, GLfloat blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3FVEXTPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3IEXTPROC) (GLint red, GLint green, GLint blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3IVEXTPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3SEXTPROC) (GLshort red, GLshort green, GLshort blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3SVEXTPROC) (const GLshort *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UBEXTPROC) (GLubyte red, GLubyte green, GLubyte blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UBVEXTPROC) (const GLubyte *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UIEXTPROC) (GLuint red, GLuint green, GLuint blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UIVEXTPROC) (const GLuint *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3USEXTPROC) (GLushort red, GLushort green, GLushort blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3USVEXTPROC) (const GLushort *v);
-typedef void (APIENTRYP PFNGLSECONDARYCOLORPOINTEREXTPROC) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif
-
-#ifndef GL_EXT_texture_perturb_normal
-#define GL_EXT_texture_perturb_normal 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTextureNormalEXT (GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXTURENORMALEXTPROC) (GLenum mode);
-#endif
-
-#ifndef GL_EXT_multi_draw_arrays
-#define GL_EXT_multi_draw_arrays 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glMultiDrawArraysEXT (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
-GLAPI void APIENTRY glMultiDrawElementsEXT (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLMULTIDRAWARRAYSEXTPROC) (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
-typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSEXTPROC) (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount);
-#endif
-
-#ifndef GL_EXT_fog_coord
-#define GL_EXT_fog_coord 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFogCoordfEXT (GLfloat coord);
-GLAPI void APIENTRY glFogCoordfvEXT (const GLfloat *coord);
-GLAPI void APIENTRY glFogCoorddEXT (GLdouble coord);
-GLAPI void APIENTRY glFogCoorddvEXT (const GLdouble *coord);
-GLAPI void APIENTRY glFogCoordPointerEXT (GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFOGCOORDFEXTPROC) (GLfloat coord);
-typedef void (APIENTRYP PFNGLFOGCOORDFVEXTPROC) (const GLfloat *coord);
-typedef void (APIENTRYP PFNGLFOGCOORDDEXTPROC) (GLdouble coord);
-typedef void (APIENTRYP PFNGLFOGCOORDDVEXTPROC) (const GLdouble *coord);
-typedef void (APIENTRYP PFNGLFOGCOORDPOINTEREXTPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif
-
-#ifndef GL_REND_screen_coordinates
-#define GL_REND_screen_coordinates 1
-#endif
-
-#ifndef GL_EXT_coordinate_frame
-#define GL_EXT_coordinate_frame 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTangent3bEXT (GLbyte tx, GLbyte ty, GLbyte tz);
-GLAPI void APIENTRY glTangent3bvEXT (const GLbyte *v);
-GLAPI void APIENTRY glTangent3dEXT (GLdouble tx, GLdouble ty, GLdouble tz);
-GLAPI void APIENTRY glTangent3dvEXT (const GLdouble *v);
-GLAPI void APIENTRY glTangent3fEXT (GLfloat tx, GLfloat ty, GLfloat tz);
-GLAPI void APIENTRY glTangent3fvEXT (const GLfloat *v);
-GLAPI void APIENTRY glTangent3iEXT (GLint tx, GLint ty, GLint tz);
-GLAPI void APIENTRY glTangent3ivEXT (const GLint *v);
-GLAPI void APIENTRY glTangent3sEXT (GLshort tx, GLshort ty, GLshort tz);
-GLAPI void APIENTRY glTangent3svEXT (const GLshort *v);
-GLAPI void APIENTRY glBinormal3bEXT (GLbyte bx, GLbyte by, GLbyte bz);
-GLAPI void APIENTRY glBinormal3bvEXT (const GLbyte *v);
-GLAPI void APIENTRY glBinormal3dEXT (GLdouble bx, GLdouble by, GLdouble bz);
-GLAPI void APIENTRY glBinormal3dvEXT (const GLdouble *v);
-GLAPI void APIENTRY glBinormal3fEXT (GLfloat bx, GLfloat by, GLfloat bz);
-GLAPI void APIENTRY glBinormal3fvEXT (const GLfloat *v);
-GLAPI void APIENTRY glBinormal3iEXT (GLint bx, GLint by, GLint bz);
-GLAPI void APIENTRY glBinormal3ivEXT (const GLint *v);
-GLAPI void APIENTRY glBinormal3sEXT (GLshort bx, GLshort by, GLshort bz);
-GLAPI void APIENTRY glBinormal3svEXT (const GLshort *v);
-GLAPI void APIENTRY glTangentPointerEXT (GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glBinormalPointerEXT (GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTANGENT3BEXTPROC) (GLbyte tx, GLbyte ty, GLbyte tz);
-typedef void (APIENTRYP PFNGLTANGENT3BVEXTPROC) (const GLbyte *v);
-typedef void (APIENTRYP PFNGLTANGENT3DEXTPROC) (GLdouble tx, GLdouble ty, GLdouble tz);
-typedef void (APIENTRYP PFNGLTANGENT3DVEXTPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLTANGENT3FEXTPROC) (GLfloat tx, GLfloat ty, GLfloat tz);
-typedef void (APIENTRYP PFNGLTANGENT3FVEXTPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLTANGENT3IEXTPROC) (GLint tx, GLint ty, GLint tz);
-typedef void (APIENTRYP PFNGLTANGENT3IVEXTPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLTANGENT3SEXTPROC) (GLshort tx, GLshort ty, GLshort tz);
-typedef void (APIENTRYP PFNGLTANGENT3SVEXTPROC) (const GLshort *v);
-typedef void (APIENTRYP PFNGLBINORMAL3BEXTPROC) (GLbyte bx, GLbyte by, GLbyte bz);
-typedef void (APIENTRYP PFNGLBINORMAL3BVEXTPROC) (const GLbyte *v);
-typedef void (APIENTRYP PFNGLBINORMAL3DEXTPROC) (GLdouble bx, GLdouble by, GLdouble bz);
-typedef void (APIENTRYP PFNGLBINORMAL3DVEXTPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLBINORMAL3FEXTPROC) (GLfloat bx, GLfloat by, GLfloat bz);
-typedef void (APIENTRYP PFNGLBINORMAL3FVEXTPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLBINORMAL3IEXTPROC) (GLint bx, GLint by, GLint bz);
-typedef void (APIENTRYP PFNGLBINORMAL3IVEXTPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLBINORMAL3SEXTPROC) (GLshort bx, GLshort by, GLshort bz);
-typedef void (APIENTRYP PFNGLBINORMAL3SVEXTPROC) (const GLshort *v);
-typedef void (APIENTRYP PFNGLTANGENTPOINTEREXTPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLBINORMALPOINTEREXTPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif
-
-#ifndef GL_EXT_texture_env_combine
-#define GL_EXT_texture_env_combine 1
-#endif
-
-#ifndef GL_APPLE_specular_vector
-#define GL_APPLE_specular_vector 1
-#endif
-
-#ifndef GL_APPLE_transform_hint
-#define GL_APPLE_transform_hint 1
-#endif
-
-#ifndef GL_SGIX_fog_scale
-#define GL_SGIX_fog_scale 1
-#endif
-
-#ifndef GL_SUNX_constant_data
-#define GL_SUNX_constant_data 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFinishTextureSUNX (void);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFINISHTEXTURESUNXPROC) (void);
-#endif
-
-#ifndef GL_SUN_global_alpha
-#define GL_SUN_global_alpha 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGlobalAlphaFactorbSUN (GLbyte factor);
-GLAPI void APIENTRY glGlobalAlphaFactorsSUN (GLshort factor);
-GLAPI void APIENTRY glGlobalAlphaFactoriSUN (GLint factor);
-GLAPI void APIENTRY glGlobalAlphaFactorfSUN (GLfloat factor);
-GLAPI void APIENTRY glGlobalAlphaFactordSUN (GLdouble factor);
-GLAPI void APIENTRY glGlobalAlphaFactorubSUN (GLubyte factor);
-GLAPI void APIENTRY glGlobalAlphaFactorusSUN (GLushort factor);
-GLAPI void APIENTRY glGlobalAlphaFactoruiSUN (GLuint factor);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORBSUNPROC) (GLbyte factor);
-typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORSSUNPROC) (GLshort factor);
-typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORISUNPROC) (GLint factor);
-typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORFSUNPROC) (GLfloat factor);
-typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORDSUNPROC) (GLdouble factor);
-typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORUBSUNPROC) (GLubyte factor);
-typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORUSSUNPROC) (GLushort factor);
-typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORUISUNPROC) (GLuint factor);
-#endif
-
-#ifndef GL_SUN_triangle_list
-#define GL_SUN_triangle_list 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glReplacementCodeuiSUN (GLuint code);
-GLAPI void APIENTRY glReplacementCodeusSUN (GLushort code);
-GLAPI void APIENTRY glReplacementCodeubSUN (GLubyte code);
-GLAPI void APIENTRY glReplacementCodeuivSUN (const GLuint *code);
-GLAPI void APIENTRY glReplacementCodeusvSUN (const GLushort *code);
-GLAPI void APIENTRY glReplacementCodeubvSUN (const GLubyte *code);
-GLAPI void APIENTRY glReplacementCodePointerSUN (GLenum type, GLsizei stride, const GLvoid* *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUISUNPROC) (GLuint code);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUSSUNPROC) (GLushort code);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUBSUNPROC) (GLubyte code);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUIVSUNPROC) (const GLuint *code);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUSVSUNPROC) (const GLushort *code);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUBVSUNPROC) (const GLubyte *code);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEPOINTERSUNPROC) (GLenum type, GLsizei stride, const GLvoid* *pointer);
-#endif
-
-#ifndef GL_SUN_vertex
-#define GL_SUN_vertex 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glColor4ubVertex2fSUN (GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y);
-GLAPI void APIENTRY glColor4ubVertex2fvSUN (const GLubyte *c, const GLfloat *v);
-GLAPI void APIENTRY glColor4ubVertex3fSUN (GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glColor4ubVertex3fvSUN (const GLubyte *c, const GLfloat *v);
-GLAPI void APIENTRY glColor3fVertex3fSUN (GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glColor3fVertex3fvSUN (const GLfloat *c, const GLfloat *v);
-GLAPI void APIENTRY glNormal3fVertex3fSUN (GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glNormal3fVertex3fvSUN (const GLfloat *n, const GLfloat *v);
-GLAPI void APIENTRY glColor4fNormal3fVertex3fSUN (GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glColor4fNormal3fVertex3fvSUN (const GLfloat *c, const GLfloat *n, const GLfloat *v);
-GLAPI void APIENTRY glTexCoord2fVertex3fSUN (GLfloat s, GLfloat t, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glTexCoord2fVertex3fvSUN (const GLfloat *tc, const GLfloat *v);
-GLAPI void APIENTRY glTexCoord4fVertex4fSUN (GLfloat s, GLfloat t, GLfloat p, GLfloat q, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glTexCoord4fVertex4fvSUN (const GLfloat *tc, const GLfloat *v);
-GLAPI void APIENTRY glTexCoord2fColor4ubVertex3fSUN (GLfloat s, GLfloat t, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glTexCoord2fColor4ubVertex3fvSUN (const GLfloat *tc, const GLubyte *c, const GLfloat *v);
-GLAPI void APIENTRY glTexCoord2fColor3fVertex3fSUN (GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glTexCoord2fColor3fVertex3fvSUN (const GLfloat *tc, const GLfloat *c, const GLfloat *v);
-GLAPI void APIENTRY glTexCoord2fNormal3fVertex3fSUN (GLfloat s, GLfloat t, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glTexCoord2fNormal3fVertex3fvSUN (const GLfloat *tc, const GLfloat *n, const GLfloat *v);
-GLAPI void APIENTRY glTexCoord2fColor4fNormal3fVertex3fSUN (GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glTexCoord2fColor4fNormal3fVertex3fvSUN (const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
-GLAPI void APIENTRY glTexCoord4fColor4fNormal3fVertex4fSUN (GLfloat s, GLfloat t, GLfloat p, GLfloat q, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glTexCoord4fColor4fNormal3fVertex4fvSUN (const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
-GLAPI void APIENTRY glReplacementCodeuiVertex3fSUN (GLuint rc, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glReplacementCodeuiVertex3fvSUN (const GLuint *rc, const GLfloat *v);
-GLAPI void APIENTRY glReplacementCodeuiColor4ubVertex3fSUN (GLuint rc, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glReplacementCodeuiColor4ubVertex3fvSUN (const GLuint *rc, const GLubyte *c, const GLfloat *v);
-GLAPI void APIENTRY glReplacementCodeuiColor3fVertex3fSUN (GLuint rc, GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glReplacementCodeuiColor3fVertex3fvSUN (const GLuint *rc, const GLfloat *c, const GLfloat *v);
-GLAPI void APIENTRY glReplacementCodeuiNormal3fVertex3fSUN (GLuint rc, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glReplacementCodeuiNormal3fVertex3fvSUN (const GLuint *rc, const GLfloat *n, const GLfloat *v);
-GLAPI void APIENTRY glReplacementCodeuiColor4fNormal3fVertex3fSUN (GLuint rc, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glReplacementCodeuiColor4fNormal3fVertex3fvSUN (const GLuint *rc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
-GLAPI void APIENTRY glReplacementCodeuiTexCoord2fVertex3fSUN (GLuint rc, GLfloat s, GLfloat t, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glReplacementCodeuiTexCoord2fVertex3fvSUN (const GLuint *rc, const GLfloat *tc, const GLfloat *v);
-GLAPI void APIENTRY glReplacementCodeuiTexCoord2fNormal3fVertex3fSUN (GLuint rc, GLfloat s, GLfloat t, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glReplacementCodeuiTexCoord2fNormal3fVertex3fvSUN (const GLuint *rc, const GLfloat *tc, const GLfloat *n, const GLfloat *v);
-GLAPI void APIENTRY glReplacementCodeuiTexCoord2fColor4fNormal3fVertex3fSUN (GLuint rc, GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glReplacementCodeuiTexCoord2fColor4fNormal3fVertex3fvSUN (const GLuint *rc, const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOLOR4UBVERTEX2FSUNPROC) (GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y);
-typedef void (APIENTRYP PFNGLCOLOR4UBVERTEX2FVSUNPROC) (const GLubyte *c, const GLfloat *v);
-typedef void (APIENTRYP PFNGLCOLOR4UBVERTEX3FSUNPROC) (GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLCOLOR4UBVERTEX3FVSUNPROC) (const GLubyte *c, const GLfloat *v);
-typedef void (APIENTRYP PFNGLCOLOR3FVERTEX3FSUNPROC) (GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLCOLOR3FVERTEX3FVSUNPROC) (const GLfloat *c, const GLfloat *v);
-typedef void (APIENTRYP PFNGLNORMAL3FVERTEX3FSUNPROC) (GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLNORMAL3FVERTEX3FVSUNPROC) (const GLfloat *n, const GLfloat *v);
-typedef void (APIENTRYP PFNGLCOLOR4FNORMAL3FVERTEX3FSUNPROC) (GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLCOLOR4FNORMAL3FVERTEX3FVSUNPROC) (const GLfloat *c, const GLfloat *n, const GLfloat *v);
-typedef void (APIENTRYP PFNGLTEXCOORD2FVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLTEXCOORD2FVERTEX3FVSUNPROC) (const GLfloat *tc, const GLfloat *v);
-typedef void (APIENTRYP PFNGLTEXCOORD4FVERTEX4FSUNPROC) (GLfloat s, GLfloat t, GLfloat p, GLfloat q, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLTEXCOORD4FVERTEX4FVSUNPROC) (const GLfloat *tc, const GLfloat *v);
-typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR4UBVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR4UBVERTEX3FVSUNPROC) (const GLfloat *tc, const GLubyte *c, const GLfloat *v);
-typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR3FVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR3FVERTEX3FVSUNPROC) (const GLfloat *tc, const GLfloat *c, const GLfloat *v);
-typedef void (APIENTRYP PFNGLTEXCOORD2FNORMAL3FVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLTEXCOORD2FNORMAL3FVERTEX3FVSUNPROC) (const GLfloat *tc, const GLfloat *n, const GLfloat *v);
-typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR4FNORMAL3FVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR4FNORMAL3FVERTEX3FVSUNPROC) (const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
-typedef void (APIENTRYP PFNGLTEXCOORD4FCOLOR4FNORMAL3FVERTEX4FSUNPROC) (GLfloat s, GLfloat t, GLfloat p, GLfloat q, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLTEXCOORD4FCOLOR4FNORMAL3FVERTEX4FVSUNPROC) (const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUIVERTEX3FSUNPROC) (GLuint rc, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUIVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR4UBVERTEX3FSUNPROC) (GLuint rc, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR4UBVERTEX3FVSUNPROC) (const GLuint *rc, const GLubyte *c, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR3FVERTEX3FSUNPROC) (GLuint rc, GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *c, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUINORMAL3FVERTEX3FSUNPROC) (GLuint rc, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUINORMAL3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *n, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR4FNORMAL3FVERTEX3FSUNPROC) (GLuint rc, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR4FNORMAL3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FVERTEX3FSUNPROC) (GLuint rc, GLfloat s, GLfloat t, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *tc, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FNORMAL3FVERTEX3FSUNPROC) (GLuint rc, GLfloat s, GLfloat t, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FNORMAL3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *tc, const GLfloat *n, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FCOLOR4FNORMAL3FVERTEX3FSUNPROC) (GLuint rc, GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FCOLOR4FNORMAL3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
-#endif
-
-#ifndef GL_EXT_blend_func_separate
-#define GL_EXT_blend_func_separate 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendFuncSeparateEXT (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEEXTPROC) (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
-#endif
-
-#ifndef GL_INGR_blend_func_separate
-#define GL_INGR_blend_func_separate 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendFuncSeparateINGR (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEINGRPROC) (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
-#endif
-
-#ifndef GL_INGR_color_clamp
-#define GL_INGR_color_clamp 1
-#endif
-
-#ifndef GL_INGR_interlace_read
-#define GL_INGR_interlace_read 1
-#endif
-
-#ifndef GL_EXT_stencil_wrap
-#define GL_EXT_stencil_wrap 1
-#endif
-
-#ifndef GL_EXT_422_pixels
-#define GL_EXT_422_pixels 1
-#endif
-
-#ifndef GL_NV_texgen_reflection
-#define GL_NV_texgen_reflection 1
-#endif
-
-#ifndef GL_SUN_convolution_border_modes
-#define GL_SUN_convolution_border_modes 1
-#endif
-
-#ifndef GL_EXT_texture_env_add
-#define GL_EXT_texture_env_add 1
-#endif
-
-#ifndef GL_EXT_texture_lod_bias
-#define GL_EXT_texture_lod_bias 1
-#endif
-
-#ifndef GL_EXT_texture_filter_anisotropic
-#define GL_EXT_texture_filter_anisotropic 1
-#endif
-
-#ifndef GL_EXT_vertex_weighting
-#define GL_EXT_vertex_weighting 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexWeightfEXT (GLfloat weight);
-GLAPI void APIENTRY glVertexWeightfvEXT (const GLfloat *weight);
-GLAPI void APIENTRY glVertexWeightPointerEXT (GLsizei size, GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXWEIGHTFEXTPROC) (GLfloat weight);
-typedef void (APIENTRYP PFNGLVERTEXWEIGHTFVEXTPROC) (const GLfloat *weight);
-typedef void (APIENTRYP PFNGLVERTEXWEIGHTPOINTEREXTPROC) (GLsizei size, GLenum type, GLsizei stride, const GLvoid *pointer);
-#endif
-
-#ifndef GL_NV_light_max_exponent
-#define GL_NV_light_max_exponent 1
-#endif
-
-#ifndef GL_NV_vertex_array_range
-#define GL_NV_vertex_array_range 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFlushVertexArrayRangeNV (void);
-GLAPI void APIENTRY glVertexArrayRangeNV (GLsizei length, const GLvoid *pointer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFLUSHVERTEXARRAYRANGENVPROC) (void);
-typedef void (APIENTRYP PFNGLVERTEXARRAYRANGENVPROC) (GLsizei length, const GLvoid *pointer);
-#endif
-
-#ifndef GL_NV_register_combiners
-#define GL_NV_register_combiners 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glCombinerParameterfvNV (GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glCombinerParameterfNV (GLenum pname, GLfloat param);
-GLAPI void APIENTRY glCombinerParameterivNV (GLenum pname, const GLint *params);
-GLAPI void APIENTRY glCombinerParameteriNV (GLenum pname, GLint param);
-GLAPI void APIENTRY glCombinerInputNV (GLenum stage, GLenum portion, GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage);
-GLAPI void APIENTRY glCombinerOutputNV (GLenum stage, GLenum portion, GLenum abOutput, GLenum cdOutput, GLenum sumOutput, GLenum scale, GLenum bias, GLboolean abDotProduct, GLboolean cdDotProduct, GLboolean muxSum);
-GLAPI void APIENTRY glFinalCombinerInputNV (GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage);
-GLAPI void APIENTRY glGetCombinerInputParameterfvNV (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetCombinerInputParameterivNV (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetCombinerOutputParameterfvNV (GLenum stage, GLenum portion, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetCombinerOutputParameterivNV (GLenum stage, GLenum portion, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetFinalCombinerInputParameterfvNV (GLenum variable, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetFinalCombinerInputParameterivNV (GLenum variable, GLenum pname, GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOMBINERPARAMETERFVNVPROC) (GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLCOMBINERPARAMETERFNVPROC) (GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLCOMBINERPARAMETERIVNVPROC) (GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLCOMBINERPARAMETERINVPROC) (GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLCOMBINERINPUTNVPROC) (GLenum stage, GLenum portion, GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage);
-typedef void (APIENTRYP PFNGLCOMBINEROUTPUTNVPROC) (GLenum stage, GLenum portion, GLenum abOutput, GLenum cdOutput, GLenum sumOutput, GLenum scale, GLenum bias, GLboolean abDotProduct, GLboolean cdDotProduct, GLboolean muxSum);
-typedef void (APIENTRYP PFNGLFINALCOMBINERINPUTNVPROC) (GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage);
-typedef void (APIENTRYP PFNGLGETCOMBINERINPUTPARAMETERFVNVPROC) (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETCOMBINERINPUTPARAMETERIVNVPROC) (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETCOMBINEROUTPUTPARAMETERFVNVPROC) (GLenum stage, GLenum portion, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETCOMBINEROUTPUTPARAMETERIVNVPROC) (GLenum stage, GLenum portion, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETFINALCOMBINERINPUTPARAMETERFVNVPROC) (GLenum variable, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETFINALCOMBINERINPUTPARAMETERIVNVPROC) (GLenum variable, GLenum pname, GLint *params);
-#endif
-
-#ifndef GL_NV_fog_distance
-#define GL_NV_fog_distance 1
-#endif
-
-#ifndef GL_NV_texgen_emboss
-#define GL_NV_texgen_emboss 1
-#endif
-
-#ifndef GL_NV_blend_square
-#define GL_NV_blend_square 1
-#endif
-
-#ifndef GL_NV_texture_env_combine4
-#define GL_NV_texture_env_combine4 1
-#endif
-
-#ifndef GL_MESA_resize_buffers
-#define GL_MESA_resize_buffers 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glResizeBuffersMESA (void);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLRESIZEBUFFERSMESAPROC) (void);
-#endif
-
-#ifndef GL_MESA_window_pos
-#define GL_MESA_window_pos 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glWindowPos2dMESA (GLdouble x, GLdouble y);
-GLAPI void APIENTRY glWindowPos2dvMESA (const GLdouble *v);
-GLAPI void APIENTRY glWindowPos2fMESA (GLfloat x, GLfloat y);
-GLAPI void APIENTRY glWindowPos2fvMESA (const GLfloat *v);
-GLAPI void APIENTRY glWindowPos2iMESA (GLint x, GLint y);
-GLAPI void APIENTRY glWindowPos2ivMESA (const GLint *v);
-GLAPI void APIENTRY glWindowPos2sMESA (GLshort x, GLshort y);
-GLAPI void APIENTRY glWindowPos2svMESA (const GLshort *v);
-GLAPI void APIENTRY glWindowPos3dMESA (GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glWindowPos3dvMESA (const GLdouble *v);
-GLAPI void APIENTRY glWindowPos3fMESA (GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glWindowPos3fvMESA (const GLfloat *v);
-GLAPI void APIENTRY glWindowPos3iMESA (GLint x, GLint y, GLint z);
-GLAPI void APIENTRY glWindowPos3ivMESA (const GLint *v);
-GLAPI void APIENTRY glWindowPos3sMESA (GLshort x, GLshort y, GLshort z);
-GLAPI void APIENTRY glWindowPos3svMESA (const GLshort *v);
-GLAPI void APIENTRY glWindowPos4dMESA (GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glWindowPos4dvMESA (const GLdouble *v);
-GLAPI void APIENTRY glWindowPos4fMESA (GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glWindowPos4fvMESA (const GLfloat *v);
-GLAPI void APIENTRY glWindowPos4iMESA (GLint x, GLint y, GLint z, GLint w);
-GLAPI void APIENTRY glWindowPos4ivMESA (const GLint *v);
-GLAPI void APIENTRY glWindowPos4sMESA (GLshort x, GLshort y, GLshort z, GLshort w);
-GLAPI void APIENTRY glWindowPos4svMESA (const GLshort *v);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLWINDOWPOS2DMESAPROC) (GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2DVMESAPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2FMESAPROC) (GLfloat x, GLfloat y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2FVMESAPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2IMESAPROC) (GLint x, GLint y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2IVMESAPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS2SMESAPROC) (GLshort x, GLshort y);
-typedef void (APIENTRYP PFNGLWINDOWPOS2SVMESAPROC) (const GLshort *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3DMESAPROC) (GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3DVMESAPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3FMESAPROC) (GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3FVMESAPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3IMESAPROC) (GLint x, GLint y, GLint z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3IVMESAPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS3SMESAPROC) (GLshort x, GLshort y, GLshort z);
-typedef void (APIENTRYP PFNGLWINDOWPOS3SVMESAPROC) (const GLshort *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS4DMESAPROC) (GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLWINDOWPOS4DVMESAPROC) (const GLdouble *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS4FMESAPROC) (GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLWINDOWPOS4FVMESAPROC) (const GLfloat *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS4IMESAPROC) (GLint x, GLint y, GLint z, GLint w);
-typedef void (APIENTRYP PFNGLWINDOWPOS4IVMESAPROC) (const GLint *v);
-typedef void (APIENTRYP PFNGLWINDOWPOS4SMESAPROC) (GLshort x, GLshort y, GLshort z, GLshort w);
-typedef void (APIENTRYP PFNGLWINDOWPOS4SVMESAPROC) (const GLshort *v);
-#endif
-
-#ifndef GL_IBM_cull_vertex
-#define GL_IBM_cull_vertex 1
-#endif
-
-#ifndef GL_IBM_multimode_draw_arrays
-#define GL_IBM_multimode_draw_arrays 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glMultiModeDrawArraysIBM (const GLenum *mode, const GLint *first, const GLsizei *count, GLsizei primcount, GLint modestride);
-GLAPI void APIENTRY glMultiModeDrawElementsIBM (const GLenum *mode, const GLsizei *count, GLenum type, const GLvoid* const *indices, GLsizei primcount, GLint modestride);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLMULTIMODEDRAWARRAYSIBMPROC) (const GLenum *mode, const GLint *first, const GLsizei *count, GLsizei primcount, GLint modestride);
-typedef void (APIENTRYP PFNGLMULTIMODEDRAWELEMENTSIBMPROC) (const GLenum *mode, const GLsizei *count, GLenum type, const GLvoid* const *indices, GLsizei primcount, GLint modestride);
-#endif
-
-#ifndef GL_IBM_vertex_array_lists
-#define GL_IBM_vertex_array_lists 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glColorPointerListIBM (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-GLAPI void APIENTRY glSecondaryColorPointerListIBM (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-GLAPI void APIENTRY glEdgeFlagPointerListIBM (GLint stride, const GLboolean* *pointer, GLint ptrstride);
-GLAPI void APIENTRY glFogCoordPointerListIBM (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-GLAPI void APIENTRY glIndexPointerListIBM (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-GLAPI void APIENTRY glNormalPointerListIBM (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-GLAPI void APIENTRY glTexCoordPointerListIBM (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-GLAPI void APIENTRY glVertexPointerListIBM (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOLORPOINTERLISTIBMPROC) (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-typedef void (APIENTRYP PFNGLSECONDARYCOLORPOINTERLISTIBMPROC) (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-typedef void (APIENTRYP PFNGLEDGEFLAGPOINTERLISTIBMPROC) (GLint stride, const GLboolean* *pointer, GLint ptrstride);
-typedef void (APIENTRYP PFNGLFOGCOORDPOINTERLISTIBMPROC) (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-typedef void (APIENTRYP PFNGLINDEXPOINTERLISTIBMPROC) (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-typedef void (APIENTRYP PFNGLNORMALPOINTERLISTIBMPROC) (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-typedef void (APIENTRYP PFNGLTEXCOORDPOINTERLISTIBMPROC) (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-typedef void (APIENTRYP PFNGLVERTEXPOINTERLISTIBMPROC) (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
-#endif
-
-#ifndef GL_SGIX_subsample
-#define GL_SGIX_subsample 1
-#endif
-
-#ifndef GL_SGIX_ycrcba
-#define GL_SGIX_ycrcba 1
-#endif
-
-#ifndef GL_SGIX_ycrcb_subsample
-#define GL_SGIX_ycrcb_subsample 1
-#endif
-
-#ifndef GL_SGIX_depth_pass_instrument
-#define GL_SGIX_depth_pass_instrument 1
-#endif
-
-#ifndef GL_3DFX_texture_compression_FXT1
-#define GL_3DFX_texture_compression_FXT1 1
-#endif
-
-#ifndef GL_3DFX_multisample
-#define GL_3DFX_multisample 1
-#endif
-
-#ifndef GL_3DFX_tbuffer
-#define GL_3DFX_tbuffer 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTbufferMask3DFX (GLuint mask);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTBUFFERMASK3DFXPROC) (GLuint mask);
-#endif
-
-#ifndef GL_EXT_multisample
-#define GL_EXT_multisample 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glSampleMaskEXT (GLclampf value, GLboolean invert);
-GLAPI void APIENTRY glSamplePatternEXT (GLenum pattern);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSAMPLEMASKEXTPROC) (GLclampf value, GLboolean invert);
-typedef void (APIENTRYP PFNGLSAMPLEPATTERNEXTPROC) (GLenum pattern);
-#endif
-
-#ifndef GL_SGIX_vertex_preclip
-#define GL_SGIX_vertex_preclip 1
-#endif
-
-#ifndef GL_SGIX_convolution_accuracy
-#define GL_SGIX_convolution_accuracy 1
-#endif
-
-#ifndef GL_SGIX_resample
-#define GL_SGIX_resample 1
-#endif
-
-#ifndef GL_SGIS_point_line_texgen
-#define GL_SGIS_point_line_texgen 1
-#endif
-
-#ifndef GL_SGIS_texture_color_mask
-#define GL_SGIS_texture_color_mask 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTextureColorMaskSGIS (GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXTURECOLORMASKSGISPROC) (GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
-#endif
-
-#ifndef GL_SGIX_igloo_interface
-#define GL_SGIX_igloo_interface 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glIglooInterfaceSGIX (GLenum pname, const GLvoid *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLIGLOOINTERFACESGIXPROC) (GLenum pname, const GLvoid *params);
-#endif
-
-#ifndef GL_EXT_texture_env_dot3
-#define GL_EXT_texture_env_dot3 1
-#endif
-
-#ifndef GL_ATI_texture_mirror_once
-#define GL_ATI_texture_mirror_once 1
-#endif
-
-#ifndef GL_NV_fence
-#define GL_NV_fence 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDeleteFencesNV (GLsizei n, const GLuint *fences);
-GLAPI void APIENTRY glGenFencesNV (GLsizei n, GLuint *fences);
-GLAPI GLboolean APIENTRY glIsFenceNV (GLuint fence);
-GLAPI GLboolean APIENTRY glTestFenceNV (GLuint fence);
-GLAPI void APIENTRY glGetFenceivNV (GLuint fence, GLenum pname, GLint *params);
-GLAPI void APIENTRY glFinishFenceNV (GLuint fence);
-GLAPI void APIENTRY glSetFenceNV (GLuint fence, GLenum condition);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDELETEFENCESNVPROC) (GLsizei n, const GLuint *fences);
-typedef void (APIENTRYP PFNGLGENFENCESNVPROC) (GLsizei n, GLuint *fences);
-typedef GLboolean (APIENTRYP PFNGLISFENCENVPROC) (GLuint fence);
-typedef GLboolean (APIENTRYP PFNGLTESTFENCENVPROC) (GLuint fence);
-typedef void (APIENTRYP PFNGLGETFENCEIVNVPROC) (GLuint fence, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLFINISHFENCENVPROC) (GLuint fence);
-typedef void (APIENTRYP PFNGLSETFENCENVPROC) (GLuint fence, GLenum condition);
-#endif
-
-#ifndef GL_NV_evaluators
-#define GL_NV_evaluators 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glMapControlPointsNV (GLenum target, GLuint index, GLenum type, GLsizei ustride, GLsizei vstride, GLint uorder, GLint vorder, GLboolean packed, const GLvoid *points);
-GLAPI void APIENTRY glMapParameterivNV (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glMapParameterfvNV (GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glGetMapControlPointsNV (GLenum target, GLuint index, GLenum type, GLsizei ustride, GLsizei vstride, GLboolean packed, GLvoid *points);
-GLAPI void APIENTRY glGetMapParameterivNV (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetMapParameterfvNV (GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetMapAttribParameterivNV (GLenum target, GLuint index, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetMapAttribParameterfvNV (GLenum target, GLuint index, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glEvalMapsNV (GLenum target, GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLMAPCONTROLPOINTSNVPROC) (GLenum target, GLuint index, GLenum type, GLsizei ustride, GLsizei vstride, GLint uorder, GLint vorder, GLboolean packed, const GLvoid *points);
-typedef void (APIENTRYP PFNGLMAPPARAMETERIVNVPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLMAPPARAMETERFVNVPROC) (GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLGETMAPCONTROLPOINTSNVPROC) (GLenum target, GLuint index, GLenum type, GLsizei ustride, GLsizei vstride, GLboolean packed, GLvoid *points);
-typedef void (APIENTRYP PFNGLGETMAPPARAMETERIVNVPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETMAPPARAMETERFVNVPROC) (GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETMAPATTRIBPARAMETERIVNVPROC) (GLenum target, GLuint index, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETMAPATTRIBPARAMETERFVNVPROC) (GLenum target, GLuint index, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLEVALMAPSNVPROC) (GLenum target, GLenum mode);
-#endif
-
-#ifndef GL_NV_packed_depth_stencil
-#define GL_NV_packed_depth_stencil 1
-#endif
-
-#ifndef GL_NV_register_combiners2
-#define GL_NV_register_combiners2 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glCombinerStageParameterfvNV (GLenum stage, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glGetCombinerStageParameterfvNV (GLenum stage, GLenum pname, GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOMBINERSTAGEPARAMETERFVNVPROC) (GLenum stage, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLGETCOMBINERSTAGEPARAMETERFVNVPROC) (GLenum stage, GLenum pname, GLfloat *params);
-#endif
-
-#ifndef GL_NV_texture_compression_vtc
-#define GL_NV_texture_compression_vtc 1
-#endif
-
-#ifndef GL_NV_texture_rectangle
-#define GL_NV_texture_rectangle 1
-#endif
-
-#ifndef GL_NV_texture_shader
-#define GL_NV_texture_shader 1
-#endif
-
-#ifndef GL_NV_texture_shader2
-#define GL_NV_texture_shader2 1
-#endif
-
-#ifndef GL_NV_vertex_array_range2
-#define GL_NV_vertex_array_range2 1
-#endif
-
-#ifndef GL_NV_vertex_program
-#define GL_NV_vertex_program 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLboolean APIENTRY glAreProgramsResidentNV (GLsizei n, const GLuint *programs, GLboolean *residences);
-GLAPI void APIENTRY glBindProgramNV (GLenum target, GLuint id);
-GLAPI void APIENTRY glDeleteProgramsNV (GLsizei n, const GLuint *programs);
-GLAPI void APIENTRY glExecuteProgramNV (GLenum target, GLuint id, const GLfloat *params);
-GLAPI void APIENTRY glGenProgramsNV (GLsizei n, GLuint *programs);
-GLAPI void APIENTRY glGetProgramParameterdvNV (GLenum target, GLuint index, GLenum pname, GLdouble *params);
-GLAPI void APIENTRY glGetProgramParameterfvNV (GLenum target, GLuint index, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetProgramivNV (GLuint id, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetProgramStringNV (GLuint id, GLenum pname, GLubyte *program);
-GLAPI void APIENTRY glGetTrackMatrixivNV (GLenum target, GLuint address, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVertexAttribdvNV (GLuint index, GLenum pname, GLdouble *params);
-GLAPI void APIENTRY glGetVertexAttribfvNV (GLuint index, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetVertexAttribivNV (GLuint index, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVertexAttribPointervNV (GLuint index, GLenum pname, GLvoid* *pointer);
-GLAPI GLboolean APIENTRY glIsProgramNV (GLuint id);
-GLAPI void APIENTRY glLoadProgramNV (GLenum target, GLuint id, GLsizei len, const GLubyte *program);
-GLAPI void APIENTRY glProgramParameter4dNV (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glProgramParameter4dvNV (GLenum target, GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glProgramParameter4fNV (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glProgramParameter4fvNV (GLenum target, GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glProgramParameters4dvNV (GLenum target, GLuint index, GLsizei count, const GLdouble *v);
-GLAPI void APIENTRY glProgramParameters4fvNV (GLenum target, GLuint index, GLsizei count, const GLfloat *v);
-GLAPI void APIENTRY glRequestResidentProgramsNV (GLsizei n, const GLuint *programs);
-GLAPI void APIENTRY glTrackMatrixNV (GLenum target, GLuint address, GLenum matrix, GLenum transform);
-GLAPI void APIENTRY glVertexAttribPointerNV (GLuint index, GLint fsize, GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glVertexAttrib1dNV (GLuint index, GLdouble x);
-GLAPI void APIENTRY glVertexAttrib1dvNV (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib1fNV (GLuint index, GLfloat x);
-GLAPI void APIENTRY glVertexAttrib1fvNV (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib1sNV (GLuint index, GLshort x);
-GLAPI void APIENTRY glVertexAttrib1svNV (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib2dNV (GLuint index, GLdouble x, GLdouble y);
-GLAPI void APIENTRY glVertexAttrib2dvNV (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib2fNV (GLuint index, GLfloat x, GLfloat y);
-GLAPI void APIENTRY glVertexAttrib2fvNV (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib2sNV (GLuint index, GLshort x, GLshort y);
-GLAPI void APIENTRY glVertexAttrib2svNV (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib3dNV (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glVertexAttrib3dvNV (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib3fNV (GLuint index, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glVertexAttrib3fvNV (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib3sNV (GLuint index, GLshort x, GLshort y, GLshort z);
-GLAPI void APIENTRY glVertexAttrib3svNV (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib4dNV (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glVertexAttrib4dvNV (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttrib4fNV (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glVertexAttrib4fvNV (GLuint index, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttrib4sNV (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
-GLAPI void APIENTRY glVertexAttrib4svNV (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttrib4ubNV (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
-GLAPI void APIENTRY glVertexAttrib4ubvNV (GLuint index, const GLubyte *v);
-GLAPI void APIENTRY glVertexAttribs1dvNV (GLuint index, GLsizei count, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribs1fvNV (GLuint index, GLsizei count, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttribs1svNV (GLuint index, GLsizei count, const GLshort *v);
-GLAPI void APIENTRY glVertexAttribs2dvNV (GLuint index, GLsizei count, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribs2fvNV (GLuint index, GLsizei count, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttribs2svNV (GLuint index, GLsizei count, const GLshort *v);
-GLAPI void APIENTRY glVertexAttribs3dvNV (GLuint index, GLsizei count, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribs3fvNV (GLuint index, GLsizei count, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttribs3svNV (GLuint index, GLsizei count, const GLshort *v);
-GLAPI void APIENTRY glVertexAttribs4dvNV (GLuint index, GLsizei count, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribs4fvNV (GLuint index, GLsizei count, const GLfloat *v);
-GLAPI void APIENTRY glVertexAttribs4svNV (GLuint index, GLsizei count, const GLshort *v);
-GLAPI void APIENTRY glVertexAttribs4ubvNV (GLuint index, GLsizei count, const GLubyte *v);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLboolean (APIENTRYP PFNGLAREPROGRAMSRESIDENTNVPROC) (GLsizei n, const GLuint *programs, GLboolean *residences);
-typedef void (APIENTRYP PFNGLBINDPROGRAMNVPROC) (GLenum target, GLuint id);
-typedef void (APIENTRYP PFNGLDELETEPROGRAMSNVPROC) (GLsizei n, const GLuint *programs);
-typedef void (APIENTRYP PFNGLEXECUTEPROGRAMNVPROC) (GLenum target, GLuint id, const GLfloat *params);
-typedef void (APIENTRYP PFNGLGENPROGRAMSNVPROC) (GLsizei n, GLuint *programs);
-typedef void (APIENTRYP PFNGLGETPROGRAMPARAMETERDVNVPROC) (GLenum target, GLuint index, GLenum pname, GLdouble *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMPARAMETERFVNVPROC) (GLenum target, GLuint index, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMIVNVPROC) (GLuint id, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMSTRINGNVPROC) (GLuint id, GLenum pname, GLubyte *program);
-typedef void (APIENTRYP PFNGLGETTRACKMATRIXIVNVPROC) (GLenum target, GLuint address, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBDVNVPROC) (GLuint index, GLenum pname, GLdouble *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBFVNVPROC) (GLuint index, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIVNVPROC) (GLuint index, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBPOINTERVNVPROC) (GLuint index, GLenum pname, GLvoid* *pointer);
-typedef GLboolean (APIENTRYP PFNGLISPROGRAMNVPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLLOADPROGRAMNVPROC) (GLenum target, GLuint id, GLsizei len, const GLubyte *program);
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETER4DNVPROC) (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETER4DVNVPROC) (GLenum target, GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETER4FNVPROC) (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETER4FVNVPROC) (GLenum target, GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETERS4DVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLdouble *v);
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETERS4FVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLfloat *v);
-typedef void (APIENTRYP PFNGLREQUESTRESIDENTPROGRAMSNVPROC) (GLsizei n, const GLuint *programs);
-typedef void (APIENTRYP PFNGLTRACKMATRIXNVPROC) (GLenum target, GLuint address, GLenum matrix, GLenum transform);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERNVPROC) (GLuint index, GLint fsize, GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1DNVPROC) (GLuint index, GLdouble x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1DVNVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1FNVPROC) (GLuint index, GLfloat x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1FVNVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1SNVPROC) (GLuint index, GLshort x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1SVNVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2DNVPROC) (GLuint index, GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2DVNVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2FNVPROC) (GLuint index, GLfloat x, GLfloat y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2FVNVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2SNVPROC) (GLuint index, GLshort x, GLshort y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2SVNVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3DNVPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3DVNVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3FNVPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3FVNVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3SNVPROC) (GLuint index, GLshort x, GLshort y, GLshort z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3SVNVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4DNVPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4DVNVPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4FNVPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4FVNVPROC) (GLuint index, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4SNVPROC) (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4SVNVPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBNVPROC) (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBVNVPROC) (GLuint index, const GLubyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS1DVNVPROC) (GLuint index, GLsizei count, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS1FVNVPROC) (GLuint index, GLsizei count, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS1SVNVPROC) (GLuint index, GLsizei count, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS2DVNVPROC) (GLuint index, GLsizei count, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS2FVNVPROC) (GLuint index, GLsizei count, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS2SVNVPROC) (GLuint index, GLsizei count, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS3DVNVPROC) (GLuint index, GLsizei count, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS3FVNVPROC) (GLuint index, GLsizei count, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS3SVNVPROC) (GLuint index, GLsizei count, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS4DVNVPROC) (GLuint index, GLsizei count, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS4FVNVPROC) (GLuint index, GLsizei count, const GLfloat *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS4SVNVPROC) (GLuint index, GLsizei count, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS4UBVNVPROC) (GLuint index, GLsizei count, const GLubyte *v);
-#endif
-
-#ifndef GL_SGIX_texture_coordinate_clamp
-#define GL_SGIX_texture_coordinate_clamp 1
-#endif
-
-#ifndef GL_SGIX_scalebias_hint
-#define GL_SGIX_scalebias_hint 1
-#endif
-
-#ifndef GL_OML_interlace
-#define GL_OML_interlace 1
-#endif
-
-#ifndef GL_OML_subsample
-#define GL_OML_subsample 1
-#endif
-
-#ifndef GL_OML_resample
-#define GL_OML_resample 1
-#endif
-
-#ifndef GL_NV_copy_depth_to_color
-#define GL_NV_copy_depth_to_color 1
-#endif
-
-#ifndef GL_ATI_envmap_bumpmap
-#define GL_ATI_envmap_bumpmap 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTexBumpParameterivATI (GLenum pname, const GLint *param);
-GLAPI void APIENTRY glTexBumpParameterfvATI (GLenum pname, const GLfloat *param);
-GLAPI void APIENTRY glGetTexBumpParameterivATI (GLenum pname, GLint *param);
-GLAPI void APIENTRY glGetTexBumpParameterfvATI (GLenum pname, GLfloat *param);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXBUMPPARAMETERIVATIPROC) (GLenum pname, const GLint *param);
-typedef void (APIENTRYP PFNGLTEXBUMPPARAMETERFVATIPROC) (GLenum pname, const GLfloat *param);
-typedef void (APIENTRYP PFNGLGETTEXBUMPPARAMETERIVATIPROC) (GLenum pname, GLint *param);
-typedef void (APIENTRYP PFNGLGETTEXBUMPPARAMETERFVATIPROC) (GLenum pname, GLfloat *param);
-#endif
-
-#ifndef GL_ATI_fragment_shader
-#define GL_ATI_fragment_shader 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLuint APIENTRY glGenFragmentShadersATI (GLuint range);
-GLAPI void APIENTRY glBindFragmentShaderATI (GLuint id);
-GLAPI void APIENTRY glDeleteFragmentShaderATI (GLuint id);
-GLAPI void APIENTRY glBeginFragmentShaderATI (void);
-GLAPI void APIENTRY glEndFragmentShaderATI (void);
-GLAPI void APIENTRY glPassTexCoordATI (GLuint dst, GLuint coord, GLenum swizzle);
-GLAPI void APIENTRY glSampleMapATI (GLuint dst, GLuint interp, GLenum swizzle);
-GLAPI void APIENTRY glColorFragmentOp1ATI (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod);
-GLAPI void APIENTRY glColorFragmentOp2ATI (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod);
-GLAPI void APIENTRY glColorFragmentOp3ATI (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod, GLuint arg3, GLuint arg3Rep, GLuint arg3Mod);
-GLAPI void APIENTRY glAlphaFragmentOp1ATI (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod);
-GLAPI void APIENTRY glAlphaFragmentOp2ATI (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod);
-GLAPI void APIENTRY glAlphaFragmentOp3ATI (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod, GLuint arg3, GLuint arg3Rep, GLuint arg3Mod);
-GLAPI void APIENTRY glSetFragmentShaderConstantATI (GLuint dst, const GLfloat *value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLuint (APIENTRYP PFNGLGENFRAGMENTSHADERSATIPROC) (GLuint range);
-typedef void (APIENTRYP PFNGLBINDFRAGMENTSHADERATIPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLDELETEFRAGMENTSHADERATIPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLBEGINFRAGMENTSHADERATIPROC) (void);
-typedef void (APIENTRYP PFNGLENDFRAGMENTSHADERATIPROC) (void);
-typedef void (APIENTRYP PFNGLPASSTEXCOORDATIPROC) (GLuint dst, GLuint coord, GLenum swizzle);
-typedef void (APIENTRYP PFNGLSAMPLEMAPATIPROC) (GLuint dst, GLuint interp, GLenum swizzle);
-typedef void (APIENTRYP PFNGLCOLORFRAGMENTOP1ATIPROC) (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod);
-typedef void (APIENTRYP PFNGLCOLORFRAGMENTOP2ATIPROC) (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod);
-typedef void (APIENTRYP PFNGLCOLORFRAGMENTOP3ATIPROC) (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod, GLuint arg3, GLuint arg3Rep, GLuint arg3Mod);
-typedef void (APIENTRYP PFNGLALPHAFRAGMENTOP1ATIPROC) (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod);
-typedef void (APIENTRYP PFNGLALPHAFRAGMENTOP2ATIPROC) (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod);
-typedef void (APIENTRYP PFNGLALPHAFRAGMENTOP3ATIPROC) (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod, GLuint arg3, GLuint arg3Rep, GLuint arg3Mod);
-typedef void (APIENTRYP PFNGLSETFRAGMENTSHADERCONSTANTATIPROC) (GLuint dst, const GLfloat *value);
-#endif
-
-#ifndef GL_ATI_pn_triangles
-#define GL_ATI_pn_triangles 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPNTrianglesiATI (GLenum pname, GLint param);
-GLAPI void APIENTRY glPNTrianglesfATI (GLenum pname, GLfloat param);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPNTRIANGLESIATIPROC) (GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLPNTRIANGLESFATIPROC) (GLenum pname, GLfloat param);
-#endif
-
-#ifndef GL_ATI_vertex_array_object
-#define GL_ATI_vertex_array_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLuint APIENTRY glNewObjectBufferATI (GLsizei size, const GLvoid *pointer, GLenum usage);
-GLAPI GLboolean APIENTRY glIsObjectBufferATI (GLuint buffer);
-GLAPI void APIENTRY glUpdateObjectBufferATI (GLuint buffer, GLuint offset, GLsizei size, const GLvoid *pointer, GLenum preserve);
-GLAPI void APIENTRY glGetObjectBufferfvATI (GLuint buffer, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetObjectBufferivATI (GLuint buffer, GLenum pname, GLint *params);
-GLAPI void APIENTRY glFreeObjectBufferATI (GLuint buffer);
-GLAPI void APIENTRY glArrayObjectATI (GLenum array, GLint size, GLenum type, GLsizei stride, GLuint buffer, GLuint offset);
-GLAPI void APIENTRY glGetArrayObjectfvATI (GLenum array, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetArrayObjectivATI (GLenum array, GLenum pname, GLint *params);
-GLAPI void APIENTRY glVariantArrayObjectATI (GLuint id, GLenum type, GLsizei stride, GLuint buffer, GLuint offset);
-GLAPI void APIENTRY glGetVariantArrayObjectfvATI (GLuint id, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetVariantArrayObjectivATI (GLuint id, GLenum pname, GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLuint (APIENTRYP PFNGLNEWOBJECTBUFFERATIPROC) (GLsizei size, const GLvoid *pointer, GLenum usage);
-typedef GLboolean (APIENTRYP PFNGLISOBJECTBUFFERATIPROC) (GLuint buffer);
-typedef void (APIENTRYP PFNGLUPDATEOBJECTBUFFERATIPROC) (GLuint buffer, GLuint offset, GLsizei size, const GLvoid *pointer, GLenum preserve);
-typedef void (APIENTRYP PFNGLGETOBJECTBUFFERFVATIPROC) (GLuint buffer, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETOBJECTBUFFERIVATIPROC) (GLuint buffer, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLFREEOBJECTBUFFERATIPROC) (GLuint buffer);
-typedef void (APIENTRYP PFNGLARRAYOBJECTATIPROC) (GLenum array, GLint size, GLenum type, GLsizei stride, GLuint buffer, GLuint offset);
-typedef void (APIENTRYP PFNGLGETARRAYOBJECTFVATIPROC) (GLenum array, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETARRAYOBJECTIVATIPROC) (GLenum array, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLVARIANTARRAYOBJECTATIPROC) (GLuint id, GLenum type, GLsizei stride, GLuint buffer, GLuint offset);
-typedef void (APIENTRYP PFNGLGETVARIANTARRAYOBJECTFVATIPROC) (GLuint id, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETVARIANTARRAYOBJECTIVATIPROC) (GLuint id, GLenum pname, GLint *params);
-#endif
-
-#ifndef GL_EXT_vertex_shader
-#define GL_EXT_vertex_shader 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBeginVertexShaderEXT (void);
-GLAPI void APIENTRY glEndVertexShaderEXT (void);
-GLAPI void APIENTRY glBindVertexShaderEXT (GLuint id);
-GLAPI GLuint APIENTRY glGenVertexShadersEXT (GLuint range);
-GLAPI void APIENTRY glDeleteVertexShaderEXT (GLuint id);
-GLAPI void APIENTRY glShaderOp1EXT (GLenum op, GLuint res, GLuint arg1);
-GLAPI void APIENTRY glShaderOp2EXT (GLenum op, GLuint res, GLuint arg1, GLuint arg2);
-GLAPI void APIENTRY glShaderOp3EXT (GLenum op, GLuint res, GLuint arg1, GLuint arg2, GLuint arg3);
-GLAPI void APIENTRY glSwizzleEXT (GLuint res, GLuint in, GLenum outX, GLenum outY, GLenum outZ, GLenum outW);
-GLAPI void APIENTRY glWriteMaskEXT (GLuint res, GLuint in, GLenum outX, GLenum outY, GLenum outZ, GLenum outW);
-GLAPI void APIENTRY glInsertComponentEXT (GLuint res, GLuint src, GLuint num);
-GLAPI void APIENTRY glExtractComponentEXT (GLuint res, GLuint src, GLuint num);
-GLAPI GLuint APIENTRY glGenSymbolsEXT (GLenum datatype, GLenum storagetype, GLenum range, GLuint components);
-GLAPI void APIENTRY glSetInvariantEXT (GLuint id, GLenum type, const GLvoid *addr);
-GLAPI void APIENTRY glSetLocalConstantEXT (GLuint id, GLenum type, const GLvoid *addr);
-GLAPI void APIENTRY glVariantbvEXT (GLuint id, const GLbyte *addr);
-GLAPI void APIENTRY glVariantsvEXT (GLuint id, const GLshort *addr);
-GLAPI void APIENTRY glVariantivEXT (GLuint id, const GLint *addr);
-GLAPI void APIENTRY glVariantfvEXT (GLuint id, const GLfloat *addr);
-GLAPI void APIENTRY glVariantdvEXT (GLuint id, const GLdouble *addr);
-GLAPI void APIENTRY glVariantubvEXT (GLuint id, const GLubyte *addr);
-GLAPI void APIENTRY glVariantusvEXT (GLuint id, const GLushort *addr);
-GLAPI void APIENTRY glVariantuivEXT (GLuint id, const GLuint *addr);
-GLAPI void APIENTRY glVariantPointerEXT (GLuint id, GLenum type, GLuint stride, const GLvoid *addr);
-GLAPI void APIENTRY glEnableVariantClientStateEXT (GLuint id);
-GLAPI void APIENTRY glDisableVariantClientStateEXT (GLuint id);
-GLAPI GLuint APIENTRY glBindLightParameterEXT (GLenum light, GLenum value);
-GLAPI GLuint APIENTRY glBindMaterialParameterEXT (GLenum face, GLenum value);
-GLAPI GLuint APIENTRY glBindTexGenParameterEXT (GLenum unit, GLenum coord, GLenum value);
-GLAPI GLuint APIENTRY glBindTextureUnitParameterEXT (GLenum unit, GLenum value);
-GLAPI GLuint APIENTRY glBindParameterEXT (GLenum value);
-GLAPI GLboolean APIENTRY glIsVariantEnabledEXT (GLuint id, GLenum cap);
-GLAPI void APIENTRY glGetVariantBooleanvEXT (GLuint id, GLenum value, GLboolean *data);
-GLAPI void APIENTRY glGetVariantIntegervEXT (GLuint id, GLenum value, GLint *data);
-GLAPI void APIENTRY glGetVariantFloatvEXT (GLuint id, GLenum value, GLfloat *data);
-GLAPI void APIENTRY glGetVariantPointervEXT (GLuint id, GLenum value, GLvoid* *data);
-GLAPI void APIENTRY glGetInvariantBooleanvEXT (GLuint id, GLenum value, GLboolean *data);
-GLAPI void APIENTRY glGetInvariantIntegervEXT (GLuint id, GLenum value, GLint *data);
-GLAPI void APIENTRY glGetInvariantFloatvEXT (GLuint id, GLenum value, GLfloat *data);
-GLAPI void APIENTRY glGetLocalConstantBooleanvEXT (GLuint id, GLenum value, GLboolean *data);
-GLAPI void APIENTRY glGetLocalConstantIntegervEXT (GLuint id, GLenum value, GLint *data);
-GLAPI void APIENTRY glGetLocalConstantFloatvEXT (GLuint id, GLenum value, GLfloat *data);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBEGINVERTEXSHADEREXTPROC) (void);
-typedef void (APIENTRYP PFNGLENDVERTEXSHADEREXTPROC) (void);
-typedef void (APIENTRYP PFNGLBINDVERTEXSHADEREXTPROC) (GLuint id);
-typedef GLuint (APIENTRYP PFNGLGENVERTEXSHADERSEXTPROC) (GLuint range);
-typedef void (APIENTRYP PFNGLDELETEVERTEXSHADEREXTPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLSHADEROP1EXTPROC) (GLenum op, GLuint res, GLuint arg1);
-typedef void (APIENTRYP PFNGLSHADEROP2EXTPROC) (GLenum op, GLuint res, GLuint arg1, GLuint arg2);
-typedef void (APIENTRYP PFNGLSHADEROP3EXTPROC) (GLenum op, GLuint res, GLuint arg1, GLuint arg2, GLuint arg3);
-typedef void (APIENTRYP PFNGLSWIZZLEEXTPROC) (GLuint res, GLuint in, GLenum outX, GLenum outY, GLenum outZ, GLenum outW);
-typedef void (APIENTRYP PFNGLWRITEMASKEXTPROC) (GLuint res, GLuint in, GLenum outX, GLenum outY, GLenum outZ, GLenum outW);
-typedef void (APIENTRYP PFNGLINSERTCOMPONENTEXTPROC) (GLuint res, GLuint src, GLuint num);
-typedef void (APIENTRYP PFNGLEXTRACTCOMPONENTEXTPROC) (GLuint res, GLuint src, GLuint num);
-typedef GLuint (APIENTRYP PFNGLGENSYMBOLSEXTPROC) (GLenum datatype, GLenum storagetype, GLenum range, GLuint components);
-typedef void (APIENTRYP PFNGLSETINVARIANTEXTPROC) (GLuint id, GLenum type, const GLvoid *addr);
-typedef void (APIENTRYP PFNGLSETLOCALCONSTANTEXTPROC) (GLuint id, GLenum type, const GLvoid *addr);
-typedef void (APIENTRYP PFNGLVARIANTBVEXTPROC) (GLuint id, const GLbyte *addr);
-typedef void (APIENTRYP PFNGLVARIANTSVEXTPROC) (GLuint id, const GLshort *addr);
-typedef void (APIENTRYP PFNGLVARIANTIVEXTPROC) (GLuint id, const GLint *addr);
-typedef void (APIENTRYP PFNGLVARIANTFVEXTPROC) (GLuint id, const GLfloat *addr);
-typedef void (APIENTRYP PFNGLVARIANTDVEXTPROC) (GLuint id, const GLdouble *addr);
-typedef void (APIENTRYP PFNGLVARIANTUBVEXTPROC) (GLuint id, const GLubyte *addr);
-typedef void (APIENTRYP PFNGLVARIANTUSVEXTPROC) (GLuint id, const GLushort *addr);
-typedef void (APIENTRYP PFNGLVARIANTUIVEXTPROC) (GLuint id, const GLuint *addr);
-typedef void (APIENTRYP PFNGLVARIANTPOINTEREXTPROC) (GLuint id, GLenum type, GLuint stride, const GLvoid *addr);
-typedef void (APIENTRYP PFNGLENABLEVARIANTCLIENTSTATEEXTPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLDISABLEVARIANTCLIENTSTATEEXTPROC) (GLuint id);
-typedef GLuint (APIENTRYP PFNGLBINDLIGHTPARAMETEREXTPROC) (GLenum light, GLenum value);
-typedef GLuint (APIENTRYP PFNGLBINDMATERIALPARAMETEREXTPROC) (GLenum face, GLenum value);
-typedef GLuint (APIENTRYP PFNGLBINDTEXGENPARAMETEREXTPROC) (GLenum unit, GLenum coord, GLenum value);
-typedef GLuint (APIENTRYP PFNGLBINDTEXTUREUNITPARAMETEREXTPROC) (GLenum unit, GLenum value);
-typedef GLuint (APIENTRYP PFNGLBINDPARAMETEREXTPROC) (GLenum value);
-typedef GLboolean (APIENTRYP PFNGLISVARIANTENABLEDEXTPROC) (GLuint id, GLenum cap);
-typedef void (APIENTRYP PFNGLGETVARIANTBOOLEANVEXTPROC) (GLuint id, GLenum value, GLboolean *data);
-typedef void (APIENTRYP PFNGLGETVARIANTINTEGERVEXTPROC) (GLuint id, GLenum value, GLint *data);
-typedef void (APIENTRYP PFNGLGETVARIANTFLOATVEXTPROC) (GLuint id, GLenum value, GLfloat *data);
-typedef void (APIENTRYP PFNGLGETVARIANTPOINTERVEXTPROC) (GLuint id, GLenum value, GLvoid* *data);
-typedef void (APIENTRYP PFNGLGETINVARIANTBOOLEANVEXTPROC) (GLuint id, GLenum value, GLboolean *data);
-typedef void (APIENTRYP PFNGLGETINVARIANTINTEGERVEXTPROC) (GLuint id, GLenum value, GLint *data);
-typedef void (APIENTRYP PFNGLGETINVARIANTFLOATVEXTPROC) (GLuint id, GLenum value, GLfloat *data);
-typedef void (APIENTRYP PFNGLGETLOCALCONSTANTBOOLEANVEXTPROC) (GLuint id, GLenum value, GLboolean *data);
-typedef void (APIENTRYP PFNGLGETLOCALCONSTANTINTEGERVEXTPROC) (GLuint id, GLenum value, GLint *data);
-typedef void (APIENTRYP PFNGLGETLOCALCONSTANTFLOATVEXTPROC) (GLuint id, GLenum value, GLfloat *data);
-#endif
-
-#ifndef GL_ATI_vertex_streams
-#define GL_ATI_vertex_streams 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexStream1sATI (GLenum stream, GLshort x);
-GLAPI void APIENTRY glVertexStream1svATI (GLenum stream, const GLshort *coords);
-GLAPI void APIENTRY glVertexStream1iATI (GLenum stream, GLint x);
-GLAPI void APIENTRY glVertexStream1ivATI (GLenum stream, const GLint *coords);
-GLAPI void APIENTRY glVertexStream1fATI (GLenum stream, GLfloat x);
-GLAPI void APIENTRY glVertexStream1fvATI (GLenum stream, const GLfloat *coords);
-GLAPI void APIENTRY glVertexStream1dATI (GLenum stream, GLdouble x);
-GLAPI void APIENTRY glVertexStream1dvATI (GLenum stream, const GLdouble *coords);
-GLAPI void APIENTRY glVertexStream2sATI (GLenum stream, GLshort x, GLshort y);
-GLAPI void APIENTRY glVertexStream2svATI (GLenum stream, const GLshort *coords);
-GLAPI void APIENTRY glVertexStream2iATI (GLenum stream, GLint x, GLint y);
-GLAPI void APIENTRY glVertexStream2ivATI (GLenum stream, const GLint *coords);
-GLAPI void APIENTRY glVertexStream2fATI (GLenum stream, GLfloat x, GLfloat y);
-GLAPI void APIENTRY glVertexStream2fvATI (GLenum stream, const GLfloat *coords);
-GLAPI void APIENTRY glVertexStream2dATI (GLenum stream, GLdouble x, GLdouble y);
-GLAPI void APIENTRY glVertexStream2dvATI (GLenum stream, const GLdouble *coords);
-GLAPI void APIENTRY glVertexStream3sATI (GLenum stream, GLshort x, GLshort y, GLshort z);
-GLAPI void APIENTRY glVertexStream3svATI (GLenum stream, const GLshort *coords);
-GLAPI void APIENTRY glVertexStream3iATI (GLenum stream, GLint x, GLint y, GLint z);
-GLAPI void APIENTRY glVertexStream3ivATI (GLenum stream, const GLint *coords);
-GLAPI void APIENTRY glVertexStream3fATI (GLenum stream, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glVertexStream3fvATI (GLenum stream, const GLfloat *coords);
-GLAPI void APIENTRY glVertexStream3dATI (GLenum stream, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glVertexStream3dvATI (GLenum stream, const GLdouble *coords);
-GLAPI void APIENTRY glVertexStream4sATI (GLenum stream, GLshort x, GLshort y, GLshort z, GLshort w);
-GLAPI void APIENTRY glVertexStream4svATI (GLenum stream, const GLshort *coords);
-GLAPI void APIENTRY glVertexStream4iATI (GLenum stream, GLint x, GLint y, GLint z, GLint w);
-GLAPI void APIENTRY glVertexStream4ivATI (GLenum stream, const GLint *coords);
-GLAPI void APIENTRY glVertexStream4fATI (GLenum stream, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glVertexStream4fvATI (GLenum stream, const GLfloat *coords);
-GLAPI void APIENTRY glVertexStream4dATI (GLenum stream, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glVertexStream4dvATI (GLenum stream, const GLdouble *coords);
-GLAPI void APIENTRY glNormalStream3bATI (GLenum stream, GLbyte nx, GLbyte ny, GLbyte nz);
-GLAPI void APIENTRY glNormalStream3bvATI (GLenum stream, const GLbyte *coords);
-GLAPI void APIENTRY glNormalStream3sATI (GLenum stream, GLshort nx, GLshort ny, GLshort nz);
-GLAPI void APIENTRY glNormalStream3svATI (GLenum stream, const GLshort *coords);
-GLAPI void APIENTRY glNormalStream3iATI (GLenum stream, GLint nx, GLint ny, GLint nz);
-GLAPI void APIENTRY glNormalStream3ivATI (GLenum stream, const GLint *coords);
-GLAPI void APIENTRY glNormalStream3fATI (GLenum stream, GLfloat nx, GLfloat ny, GLfloat nz);
-GLAPI void APIENTRY glNormalStream3fvATI (GLenum stream, const GLfloat *coords);
-GLAPI void APIENTRY glNormalStream3dATI (GLenum stream, GLdouble nx, GLdouble ny, GLdouble nz);
-GLAPI void APIENTRY glNormalStream3dvATI (GLenum stream, const GLdouble *coords);
-GLAPI void APIENTRY glClientActiveVertexStreamATI (GLenum stream);
-GLAPI void APIENTRY glVertexBlendEnviATI (GLenum pname, GLint param);
-GLAPI void APIENTRY glVertexBlendEnvfATI (GLenum pname, GLfloat param);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXSTREAM1SATIPROC) (GLenum stream, GLshort x);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM1SVATIPROC) (GLenum stream, const GLshort *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM1IATIPROC) (GLenum stream, GLint x);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM1IVATIPROC) (GLenum stream, const GLint *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM1FATIPROC) (GLenum stream, GLfloat x);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM1FVATIPROC) (GLenum stream, const GLfloat *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM1DATIPROC) (GLenum stream, GLdouble x);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM1DVATIPROC) (GLenum stream, const GLdouble *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM2SATIPROC) (GLenum stream, GLshort x, GLshort y);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM2SVATIPROC) (GLenum stream, const GLshort *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM2IATIPROC) (GLenum stream, GLint x, GLint y);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM2IVATIPROC) (GLenum stream, const GLint *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM2FATIPROC) (GLenum stream, GLfloat x, GLfloat y);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM2FVATIPROC) (GLenum stream, const GLfloat *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM2DATIPROC) (GLenum stream, GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM2DVATIPROC) (GLenum stream, const GLdouble *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM3SATIPROC) (GLenum stream, GLshort x, GLshort y, GLshort z);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM3SVATIPROC) (GLenum stream, const GLshort *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM3IATIPROC) (GLenum stream, GLint x, GLint y, GLint z);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM3IVATIPROC) (GLenum stream, const GLint *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM3FATIPROC) (GLenum stream, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM3FVATIPROC) (GLenum stream, const GLfloat *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM3DATIPROC) (GLenum stream, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM3DVATIPROC) (GLenum stream, const GLdouble *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM4SATIPROC) (GLenum stream, GLshort x, GLshort y, GLshort z, GLshort w);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM4SVATIPROC) (GLenum stream, const GLshort *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM4IATIPROC) (GLenum stream, GLint x, GLint y, GLint z, GLint w);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM4IVATIPROC) (GLenum stream, const GLint *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM4FATIPROC) (GLenum stream, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM4FVATIPROC) (GLenum stream, const GLfloat *coords);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM4DATIPROC) (GLenum stream, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLVERTEXSTREAM4DVATIPROC) (GLenum stream, const GLdouble *coords);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3BATIPROC) (GLenum stream, GLbyte nx, GLbyte ny, GLbyte nz);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3BVATIPROC) (GLenum stream, const GLbyte *coords);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3SATIPROC) (GLenum stream, GLshort nx, GLshort ny, GLshort nz);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3SVATIPROC) (GLenum stream, const GLshort *coords);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3IATIPROC) (GLenum stream, GLint nx, GLint ny, GLint nz);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3IVATIPROC) (GLenum stream, const GLint *coords);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3FATIPROC) (GLenum stream, GLfloat nx, GLfloat ny, GLfloat nz);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3FVATIPROC) (GLenum stream, const GLfloat *coords);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3DATIPROC) (GLenum stream, GLdouble nx, GLdouble ny, GLdouble nz);
-typedef void (APIENTRYP PFNGLNORMALSTREAM3DVATIPROC) (GLenum stream, const GLdouble *coords);
-typedef void (APIENTRYP PFNGLCLIENTACTIVEVERTEXSTREAMATIPROC) (GLenum stream);
-typedef void (APIENTRYP PFNGLVERTEXBLENDENVIATIPROC) (GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLVERTEXBLENDENVFATIPROC) (GLenum pname, GLfloat param);
-#endif
-
-#ifndef GL_ATI_element_array
-#define GL_ATI_element_array 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glElementPointerATI (GLenum type, const GLvoid *pointer);
-GLAPI void APIENTRY glDrawElementArrayATI (GLenum mode, GLsizei count);
-GLAPI void APIENTRY glDrawRangeElementArrayATI (GLenum mode, GLuint start, GLuint end, GLsizei count);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLELEMENTPOINTERATIPROC) (GLenum type, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLDRAWELEMENTARRAYATIPROC) (GLenum mode, GLsizei count);
-typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTARRAYATIPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count);
-#endif
-
-#ifndef GL_SUN_mesh_array
-#define GL_SUN_mesh_array 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawMeshArraysSUN (GLenum mode, GLint first, GLsizei count, GLsizei width);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWMESHARRAYSSUNPROC) (GLenum mode, GLint first, GLsizei count, GLsizei width);
-#endif
-
-#ifndef GL_SUN_slice_accum
-#define GL_SUN_slice_accum 1
-#endif
-
-#ifndef GL_NV_multisample_filter_hint
-#define GL_NV_multisample_filter_hint 1
-#endif
-
-#ifndef GL_NV_depth_clamp
-#define GL_NV_depth_clamp 1
-#endif
-
-#ifndef GL_NV_occlusion_query
-#define GL_NV_occlusion_query 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGenOcclusionQueriesNV (GLsizei n, GLuint *ids);
-GLAPI void APIENTRY glDeleteOcclusionQueriesNV (GLsizei n, const GLuint *ids);
-GLAPI GLboolean APIENTRY glIsOcclusionQueryNV (GLuint id);
-GLAPI void APIENTRY glBeginOcclusionQueryNV (GLuint id);
-GLAPI void APIENTRY glEndOcclusionQueryNV (void);
-GLAPI void APIENTRY glGetOcclusionQueryivNV (GLuint id, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetOcclusionQueryuivNV (GLuint id, GLenum pname, GLuint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGENOCCLUSIONQUERIESNVPROC) (GLsizei n, GLuint *ids);
-typedef void (APIENTRYP PFNGLDELETEOCCLUSIONQUERIESNVPROC) (GLsizei n, const GLuint *ids);
-typedef GLboolean (APIENTRYP PFNGLISOCCLUSIONQUERYNVPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLBEGINOCCLUSIONQUERYNVPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLENDOCCLUSIONQUERYNVPROC) (void);
-typedef void (APIENTRYP PFNGLGETOCCLUSIONQUERYIVNVPROC) (GLuint id, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETOCCLUSIONQUERYUIVNVPROC) (GLuint id, GLenum pname, GLuint *params);
-#endif
-
-#ifndef GL_NV_point_sprite
-#define GL_NV_point_sprite 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPointParameteriNV (GLenum pname, GLint param);
-GLAPI void APIENTRY glPointParameterivNV (GLenum pname, const GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPOINTPARAMETERINVPROC) (GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLPOINTPARAMETERIVNVPROC) (GLenum pname, const GLint *params);
-#endif
-
-#ifndef GL_NV_texture_shader3
-#define GL_NV_texture_shader3 1
-#endif
-
-#ifndef GL_NV_vertex_program1_1
-#define GL_NV_vertex_program1_1 1
-#endif
-
-#ifndef GL_EXT_shadow_funcs
-#define GL_EXT_shadow_funcs 1
-#endif
-
-#ifndef GL_EXT_stencil_two_side
-#define GL_EXT_stencil_two_side 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glActiveStencilFaceEXT (GLenum face);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLACTIVESTENCILFACEEXTPROC) (GLenum face);
-#endif
-
-#ifndef GL_ATI_text_fragment_shader
-#define GL_ATI_text_fragment_shader 1
-#endif
-
-#ifndef GL_APPLE_client_storage
-#define GL_APPLE_client_storage 1
-#endif
-
-#ifndef GL_APPLE_element_array
-#define GL_APPLE_element_array 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glElementPointerAPPLE (GLenum type, const GLvoid *pointer);
-GLAPI void APIENTRY glDrawElementArrayAPPLE (GLenum mode, GLint first, GLsizei count);
-GLAPI void APIENTRY glDrawRangeElementArrayAPPLE (GLenum mode, GLuint start, GLuint end, GLint first, GLsizei count);
-GLAPI void APIENTRY glMultiDrawElementArrayAPPLE (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
-GLAPI void APIENTRY glMultiDrawRangeElementArrayAPPLE (GLenum mode, GLuint start, GLuint end, const GLint *first, const GLsizei *count, GLsizei primcount);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLELEMENTPOINTERAPPLEPROC) (GLenum type, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLDRAWELEMENTARRAYAPPLEPROC) (GLenum mode, GLint first, GLsizei count);
-typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTARRAYAPPLEPROC) (GLenum mode, GLuint start, GLuint end, GLint first, GLsizei count);
-typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTARRAYAPPLEPROC) (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
-typedef void (APIENTRYP PFNGLMULTIDRAWRANGEELEMENTARRAYAPPLEPROC) (GLenum mode, GLuint start, GLuint end, const GLint *first, const GLsizei *count, GLsizei primcount);
-#endif
-
-#ifndef GL_APPLE_fence
-#define GL_APPLE_fence 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGenFencesAPPLE (GLsizei n, GLuint *fences);
-GLAPI void APIENTRY glDeleteFencesAPPLE (GLsizei n, const GLuint *fences);
-GLAPI void APIENTRY glSetFenceAPPLE (GLuint fence);
-GLAPI GLboolean APIENTRY glIsFenceAPPLE (GLuint fence);
-GLAPI GLboolean APIENTRY glTestFenceAPPLE (GLuint fence);
-GLAPI void APIENTRY glFinishFenceAPPLE (GLuint fence);
-GLAPI GLboolean APIENTRY glTestObjectAPPLE (GLenum object, GLuint name);
-GLAPI void APIENTRY glFinishObjectAPPLE (GLenum object, GLint name);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGENFENCESAPPLEPROC) (GLsizei n, GLuint *fences);
-typedef void (APIENTRYP PFNGLDELETEFENCESAPPLEPROC) (GLsizei n, const GLuint *fences);
-typedef void (APIENTRYP PFNGLSETFENCEAPPLEPROC) (GLuint fence);
-typedef GLboolean (APIENTRYP PFNGLISFENCEAPPLEPROC) (GLuint fence);
-typedef GLboolean (APIENTRYP PFNGLTESTFENCEAPPLEPROC) (GLuint fence);
-typedef void (APIENTRYP PFNGLFINISHFENCEAPPLEPROC) (GLuint fence);
-typedef GLboolean (APIENTRYP PFNGLTESTOBJECTAPPLEPROC) (GLenum object, GLuint name);
-typedef void (APIENTRYP PFNGLFINISHOBJECTAPPLEPROC) (GLenum object, GLint name);
-#endif
-
-#ifndef GL_APPLE_vertex_array_object
-#define GL_APPLE_vertex_array_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBindVertexArrayAPPLE (GLuint array);
-GLAPI void APIENTRY glDeleteVertexArraysAPPLE (GLsizei n, const GLuint *arrays);
-GLAPI void APIENTRY glGenVertexArraysAPPLE (GLsizei n, GLuint *arrays);
-GLAPI GLboolean APIENTRY glIsVertexArrayAPPLE (GLuint array);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBINDVERTEXARRAYAPPLEPROC) (GLuint array);
-typedef void (APIENTRYP PFNGLDELETEVERTEXARRAYSAPPLEPROC) (GLsizei n, const GLuint *arrays);
-typedef void (APIENTRYP PFNGLGENVERTEXARRAYSAPPLEPROC) (GLsizei n, GLuint *arrays);
-typedef GLboolean (APIENTRYP PFNGLISVERTEXARRAYAPPLEPROC) (GLuint array);
-#endif
-
-#ifndef GL_APPLE_vertex_array_range
-#define GL_APPLE_vertex_array_range 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexArrayRangeAPPLE (GLsizei length, GLvoid *pointer);
-GLAPI void APIENTRY glFlushVertexArrayRangeAPPLE (GLsizei length, GLvoid *pointer);
-GLAPI void APIENTRY glVertexArrayParameteriAPPLE (GLenum pname, GLint param);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXARRAYRANGEAPPLEPROC) (GLsizei length, GLvoid *pointer);
-typedef void (APIENTRYP PFNGLFLUSHVERTEXARRAYRANGEAPPLEPROC) (GLsizei length, GLvoid *pointer);
-typedef void (APIENTRYP PFNGLVERTEXARRAYPARAMETERIAPPLEPROC) (GLenum pname, GLint param);
-#endif
-
-#ifndef GL_APPLE_ycbcr_422
-#define GL_APPLE_ycbcr_422 1
-#endif
-
-#ifndef GL_S3_s3tc
-#define GL_S3_s3tc 1
-#endif
-
-#ifndef GL_ATI_draw_buffers
-#define GL_ATI_draw_buffers 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawBuffersATI (GLsizei n, const GLenum *bufs);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWBUFFERSATIPROC) (GLsizei n, const GLenum *bufs);
-#endif
-
-#ifndef GL_ATI_pixel_format_float
-#define GL_ATI_pixel_format_float 1
-/* This is really a WGL extension, but defines some associated GL enums.
- * ATI does not export "GL_ATI_pixel_format_float" in the GL_EXTENSIONS string.
- */
-#endif
-
-#ifndef GL_ATI_texture_env_combine3
-#define GL_ATI_texture_env_combine3 1
-#endif
-
-#ifndef GL_ATI_texture_float
-#define GL_ATI_texture_float 1
-#endif
-
-#ifndef GL_NV_float_buffer
-#define GL_NV_float_buffer 1
-#endif
-
-#ifndef GL_NV_fragment_program
-#define GL_NV_fragment_program 1
-/* Some NV_fragment_program entry points are shared with ARB_vertex_program. */
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProgramNamedParameter4fNV (GLuint id, GLsizei len, const GLubyte *name, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glProgramNamedParameter4dNV (GLuint id, GLsizei len, const GLubyte *name, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glProgramNamedParameter4fvNV (GLuint id, GLsizei len, const GLubyte *name, const GLfloat *v);
-GLAPI void APIENTRY glProgramNamedParameter4dvNV (GLuint id, GLsizei len, const GLubyte *name, const GLdouble *v);
-GLAPI void APIENTRY glGetProgramNamedParameterfvNV (GLuint id, GLsizei len, const GLubyte *name, GLfloat *params);
-GLAPI void APIENTRY glGetProgramNamedParameterdvNV (GLuint id, GLsizei len, const GLubyte *name, GLdouble *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROGRAMNAMEDPARAMETER4FNVPROC) (GLuint id, GLsizei len, const GLubyte *name, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLPROGRAMNAMEDPARAMETER4DNVPROC) (GLuint id, GLsizei len, const GLubyte *name, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLPROGRAMNAMEDPARAMETER4FVNVPROC) (GLuint id, GLsizei len, const GLubyte *name, const GLfloat *v);
-typedef void (APIENTRYP PFNGLPROGRAMNAMEDPARAMETER4DVNVPROC) (GLuint id, GLsizei len, const GLubyte *name, const GLdouble *v);
-typedef void (APIENTRYP PFNGLGETPROGRAMNAMEDPARAMETERFVNVPROC) (GLuint id, GLsizei len, const GLubyte *name, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMNAMEDPARAMETERDVNVPROC) (GLuint id, GLsizei len, const GLubyte *name, GLdouble *params);
-#endif
-
-#ifndef GL_NV_half_float
-#define GL_NV_half_float 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertex2hNV (GLhalfNV x, GLhalfNV y);
-GLAPI void APIENTRY glVertex2hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glVertex3hNV (GLhalfNV x, GLhalfNV y, GLhalfNV z);
-GLAPI void APIENTRY glVertex3hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glVertex4hNV (GLhalfNV x, GLhalfNV y, GLhalfNV z, GLhalfNV w);
-GLAPI void APIENTRY glVertex4hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glNormal3hNV (GLhalfNV nx, GLhalfNV ny, GLhalfNV nz);
-GLAPI void APIENTRY glNormal3hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glColor3hNV (GLhalfNV red, GLhalfNV green, GLhalfNV blue);
-GLAPI void APIENTRY glColor3hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glColor4hNV (GLhalfNV red, GLhalfNV green, GLhalfNV blue, GLhalfNV alpha);
-GLAPI void APIENTRY glColor4hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glTexCoord1hNV (GLhalfNV s);
-GLAPI void APIENTRY glTexCoord1hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glTexCoord2hNV (GLhalfNV s, GLhalfNV t);
-GLAPI void APIENTRY glTexCoord2hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glTexCoord3hNV (GLhalfNV s, GLhalfNV t, GLhalfNV r);
-GLAPI void APIENTRY glTexCoord3hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glTexCoord4hNV (GLhalfNV s, GLhalfNV t, GLhalfNV r, GLhalfNV q);
-GLAPI void APIENTRY glTexCoord4hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glMultiTexCoord1hNV (GLenum target, GLhalfNV s);
-GLAPI void APIENTRY glMultiTexCoord1hvNV (GLenum target, const GLhalfNV *v);
-GLAPI void APIENTRY glMultiTexCoord2hNV (GLenum target, GLhalfNV s, GLhalfNV t);
-GLAPI void APIENTRY glMultiTexCoord2hvNV (GLenum target, const GLhalfNV *v);
-GLAPI void APIENTRY glMultiTexCoord3hNV (GLenum target, GLhalfNV s, GLhalfNV t, GLhalfNV r);
-GLAPI void APIENTRY glMultiTexCoord3hvNV (GLenum target, const GLhalfNV *v);
-GLAPI void APIENTRY glMultiTexCoord4hNV (GLenum target, GLhalfNV s, GLhalfNV t, GLhalfNV r, GLhalfNV q);
-GLAPI void APIENTRY glMultiTexCoord4hvNV (GLenum target, const GLhalfNV *v);
-GLAPI void APIENTRY glFogCoordhNV (GLhalfNV fog);
-GLAPI void APIENTRY glFogCoordhvNV (const GLhalfNV *fog);
-GLAPI void APIENTRY glSecondaryColor3hNV (GLhalfNV red, GLhalfNV green, GLhalfNV blue);
-GLAPI void APIENTRY glSecondaryColor3hvNV (const GLhalfNV *v);
-GLAPI void APIENTRY glVertexWeighthNV (GLhalfNV weight);
-GLAPI void APIENTRY glVertexWeighthvNV (const GLhalfNV *weight);
-GLAPI void APIENTRY glVertexAttrib1hNV (GLuint index, GLhalfNV x);
-GLAPI void APIENTRY glVertexAttrib1hvNV (GLuint index, const GLhalfNV *v);
-GLAPI void APIENTRY glVertexAttrib2hNV (GLuint index, GLhalfNV x, GLhalfNV y);
-GLAPI void APIENTRY glVertexAttrib2hvNV (GLuint index, const GLhalfNV *v);
-GLAPI void APIENTRY glVertexAttrib3hNV (GLuint index, GLhalfNV x, GLhalfNV y, GLhalfNV z);
-GLAPI void APIENTRY glVertexAttrib3hvNV (GLuint index, const GLhalfNV *v);
-GLAPI void APIENTRY glVertexAttrib4hNV (GLuint index, GLhalfNV x, GLhalfNV y, GLhalfNV z, GLhalfNV w);
-GLAPI void APIENTRY glVertexAttrib4hvNV (GLuint index, const GLhalfNV *v);
-GLAPI void APIENTRY glVertexAttribs1hvNV (GLuint index, GLsizei n, const GLhalfNV *v);
-GLAPI void APIENTRY glVertexAttribs2hvNV (GLuint index, GLsizei n, const GLhalfNV *v);
-GLAPI void APIENTRY glVertexAttribs3hvNV (GLuint index, GLsizei n, const GLhalfNV *v);
-GLAPI void APIENTRY glVertexAttribs4hvNV (GLuint index, GLsizei n, const GLhalfNV *v);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEX2HNVPROC) (GLhalfNV x, GLhalfNV y);
-typedef void (APIENTRYP PFNGLVERTEX2HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEX3HNVPROC) (GLhalfNV x, GLhalfNV y, GLhalfNV z);
-typedef void (APIENTRYP PFNGLVERTEX3HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEX4HNVPROC) (GLhalfNV x, GLhalfNV y, GLhalfNV z, GLhalfNV w);
-typedef void (APIENTRYP PFNGLVERTEX4HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLNORMAL3HNVPROC) (GLhalfNV nx, GLhalfNV ny, GLhalfNV nz);
-typedef void (APIENTRYP PFNGLNORMAL3HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLCOLOR3HNVPROC) (GLhalfNV red, GLhalfNV green, GLhalfNV blue);
-typedef void (APIENTRYP PFNGLCOLOR3HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLCOLOR4HNVPROC) (GLhalfNV red, GLhalfNV green, GLhalfNV blue, GLhalfNV alpha);
-typedef void (APIENTRYP PFNGLCOLOR4HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLTEXCOORD1HNVPROC) (GLhalfNV s);
-typedef void (APIENTRYP PFNGLTEXCOORD1HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLTEXCOORD2HNVPROC) (GLhalfNV s, GLhalfNV t);
-typedef void (APIENTRYP PFNGLTEXCOORD2HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLTEXCOORD3HNVPROC) (GLhalfNV s, GLhalfNV t, GLhalfNV r);
-typedef void (APIENTRYP PFNGLTEXCOORD3HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLTEXCOORD4HNVPROC) (GLhalfNV s, GLhalfNV t, GLhalfNV r, GLhalfNV q);
-typedef void (APIENTRYP PFNGLTEXCOORD4HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1HNVPROC) (GLenum target, GLhalfNV s);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD1HVNVPROC) (GLenum target, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2HNVPROC) (GLenum target, GLhalfNV s, GLhalfNV t);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD2HVNVPROC) (GLenum target, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3HNVPROC) (GLenum target, GLhalfNV s, GLhalfNV t, GLhalfNV r);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD3HVNVPROC) (GLenum target, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4HNVPROC) (GLenum target, GLhalfNV s, GLhalfNV t, GLhalfNV r, GLhalfNV q);
-typedef void (APIENTRYP PFNGLMULTITEXCOORD4HVNVPROC) (GLenum target, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLFOGCOORDHNVPROC) (GLhalfNV fog);
-typedef void (APIENTRYP PFNGLFOGCOORDHVNVPROC) (const GLhalfNV *fog);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3HNVPROC) (GLhalfNV red, GLhalfNV green, GLhalfNV blue);
-typedef void (APIENTRYP PFNGLSECONDARYCOLOR3HVNVPROC) (const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEXWEIGHTHNVPROC) (GLhalfNV weight);
-typedef void (APIENTRYP PFNGLVERTEXWEIGHTHVNVPROC) (const GLhalfNV *weight);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1HNVPROC) (GLuint index, GLhalfNV x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB1HVNVPROC) (GLuint index, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2HNVPROC) (GLuint index, GLhalfNV x, GLhalfNV y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB2HVNVPROC) (GLuint index, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3HNVPROC) (GLuint index, GLhalfNV x, GLhalfNV y, GLhalfNV z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB3HVNVPROC) (GLuint index, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4HNVPROC) (GLuint index, GLhalfNV x, GLhalfNV y, GLhalfNV z, GLhalfNV w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIB4HVNVPROC) (GLuint index, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS1HVNVPROC) (GLuint index, GLsizei n, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS2HVNVPROC) (GLuint index, GLsizei n, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS3HVNVPROC) (GLuint index, GLsizei n, const GLhalfNV *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBS4HVNVPROC) (GLuint index, GLsizei n, const GLhalfNV *v);
-#endif
-
-#ifndef GL_NV_pixel_data_range
-#define GL_NV_pixel_data_range 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPixelDataRangeNV (GLenum target, GLsizei length, GLvoid *pointer);
-GLAPI void APIENTRY glFlushPixelDataRangeNV (GLenum target);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPIXELDATARANGENVPROC) (GLenum target, GLsizei length, GLvoid *pointer);
-typedef void (APIENTRYP PFNGLFLUSHPIXELDATARANGENVPROC) (GLenum target);
-#endif
-
-#ifndef GL_NV_primitive_restart
-#define GL_NV_primitive_restart 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPrimitiveRestartNV (void);
-GLAPI void APIENTRY glPrimitiveRestartIndexNV (GLuint index);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPRIMITIVERESTARTNVPROC) (void);
-typedef void (APIENTRYP PFNGLPRIMITIVERESTARTINDEXNVPROC) (GLuint index);
-#endif
-
-#ifndef GL_NV_texture_expand_normal
-#define GL_NV_texture_expand_normal 1
-#endif
-
-#ifndef GL_NV_vertex_program2
-#define GL_NV_vertex_program2 1
-#endif
-
-#ifndef GL_ATI_map_object_buffer
-#define GL_ATI_map_object_buffer 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLvoid* APIENTRY glMapObjectBufferATI (GLuint buffer);
-GLAPI void APIENTRY glUnmapObjectBufferATI (GLuint buffer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLvoid* (APIENTRYP PFNGLMAPOBJECTBUFFERATIPROC) (GLuint buffer);
-typedef void (APIENTRYP PFNGLUNMAPOBJECTBUFFERATIPROC) (GLuint buffer);
-#endif
-
-#ifndef GL_ATI_separate_stencil
-#define GL_ATI_separate_stencil 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glStencilOpSeparateATI (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
-GLAPI void APIENTRY glStencilFuncSeparateATI (GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSTENCILOPSEPARATEATIPROC) (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
-typedef void (APIENTRYP PFNGLSTENCILFUNCSEPARATEATIPROC) (GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask);
-#endif
-
-#ifndef GL_ATI_vertex_attrib_array_object
-#define GL_ATI_vertex_attrib_array_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexAttribArrayObjectATI (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, GLuint buffer, GLuint offset);
-GLAPI void APIENTRY glGetVertexAttribArrayObjectfvATI (GLuint index, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetVertexAttribArrayObjectivATI (GLuint index, GLenum pname, GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXATTRIBARRAYOBJECTATIPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, GLuint buffer, GLuint offset);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBARRAYOBJECTFVATIPROC) (GLuint index, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBARRAYOBJECTIVATIPROC) (GLuint index, GLenum pname, GLint *params);
-#endif
-
-#ifndef GL_OES_read_format
-#define GL_OES_read_format 1
-#endif
-
-#ifndef GL_EXT_depth_bounds_test
-#define GL_EXT_depth_bounds_test 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDepthBoundsEXT (GLclampd zmin, GLclampd zmax);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDEPTHBOUNDSEXTPROC) (GLclampd zmin, GLclampd zmax);
-#endif
-
-#ifndef GL_EXT_texture_mirror_clamp
-#define GL_EXT_texture_mirror_clamp 1
-#endif
-
-#ifndef GL_EXT_blend_equation_separate
-#define GL_EXT_blend_equation_separate 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendEquationSeparateEXT (GLenum modeRGB, GLenum modeAlpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEEXTPROC) (GLenum modeRGB, GLenum modeAlpha);
-#endif
-
-#ifndef GL_MESA_pack_invert
-#define GL_MESA_pack_invert 1
-#endif
-
-#ifndef GL_MESA_ycbcr_texture
-#define GL_MESA_ycbcr_texture 1
-#endif
-
-#ifndef GL_EXT_pixel_buffer_object
-#define GL_EXT_pixel_buffer_object 1
-#endif
-
-#ifndef GL_NV_fragment_program_option
-#define GL_NV_fragment_program_option 1
-#endif
-
-#ifndef GL_NV_fragment_program2
-#define GL_NV_fragment_program2 1
-#endif
-
-#ifndef GL_NV_vertex_program2_option
-#define GL_NV_vertex_program2_option 1
-#endif
-
-#ifndef GL_NV_vertex_program3
-#define GL_NV_vertex_program3 1
-#endif
-
-#ifndef GL_EXT_framebuffer_object
-#define GL_EXT_framebuffer_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLboolean APIENTRY glIsRenderbufferEXT (GLuint renderbuffer);
-GLAPI void APIENTRY glBindRenderbufferEXT (GLenum target, GLuint renderbuffer);
-GLAPI void APIENTRY glDeleteRenderbuffersEXT (GLsizei n, const GLuint *renderbuffers);
-GLAPI void APIENTRY glGenRenderbuffersEXT (GLsizei n, GLuint *renderbuffers);
-GLAPI void APIENTRY glRenderbufferStorageEXT (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glGetRenderbufferParameterivEXT (GLenum target, GLenum pname, GLint *params);
-GLAPI GLboolean APIENTRY glIsFramebufferEXT (GLuint framebuffer);
-GLAPI void APIENTRY glBindFramebufferEXT (GLenum target, GLuint framebuffer);
-GLAPI void APIENTRY glDeleteFramebuffersEXT (GLsizei n, const GLuint *framebuffers);
-GLAPI void APIENTRY glGenFramebuffersEXT (GLsizei n, GLuint *framebuffers);
-GLAPI GLenum APIENTRY glCheckFramebufferStatusEXT (GLenum target);
-GLAPI void APIENTRY glFramebufferTexture1DEXT (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-GLAPI void APIENTRY glFramebufferTexture2DEXT (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-GLAPI void APIENTRY glFramebufferTexture3DEXT (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
-GLAPI void APIENTRY glFramebufferRenderbufferEXT (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
-GLAPI void APIENTRY glGetFramebufferAttachmentParameterivEXT (GLenum target, GLenum attachment, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGenerateMipmapEXT (GLenum target);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLboolean (APIENTRYP PFNGLISRENDERBUFFEREXTPROC) (GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLBINDRENDERBUFFEREXTPROC) (GLenum target, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLDELETERENDERBUFFERSEXTPROC) (GLsizei n, const GLuint *renderbuffers);
-typedef void (APIENTRYP PFNGLGENRENDERBUFFERSEXTPROC) (GLsizei n, GLuint *renderbuffers);
-typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
-typedef GLboolean (APIENTRYP PFNGLISFRAMEBUFFEREXTPROC) (GLuint framebuffer);
-typedef void (APIENTRYP PFNGLBINDFRAMEBUFFEREXTPROC) (GLenum target, GLuint framebuffer);
-typedef void (APIENTRYP PFNGLDELETEFRAMEBUFFERSEXTPROC) (GLsizei n, const GLuint *framebuffers);
-typedef void (APIENTRYP PFNGLGENFRAMEBUFFERSEXTPROC) (GLsizei n, GLuint *framebuffers);
-typedef GLenum (APIENTRYP PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE1DEXTPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE3DEXTPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) (GLenum target, GLenum attachment, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGENERATEMIPMAPEXTPROC) (GLenum target);
-#endif
-
-#ifndef GL_GREMEDY_string_marker
-#define GL_GREMEDY_string_marker 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glStringMarkerGREMEDY (GLsizei len, const GLvoid *string);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSTRINGMARKERGREMEDYPROC) (GLsizei len, const GLvoid *string);
-#endif
-
-#ifndef GL_EXT_packed_depth_stencil
-#define GL_EXT_packed_depth_stencil 1
-#endif
-
-#ifndef GL_EXT_stencil_clear_tag
-#define GL_EXT_stencil_clear_tag 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glStencilClearTagEXT (GLsizei stencilTagBits, GLuint stencilClearTag);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLSTENCILCLEARTAGEXTPROC) (GLsizei stencilTagBits, GLuint stencilClearTag);
-#endif
-
-#ifndef GL_EXT_texture_sRGB
-#define GL_EXT_texture_sRGB 1
-#endif
-
-#ifndef GL_EXT_framebuffer_blit
-#define GL_EXT_framebuffer_blit 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlitFramebufferEXT (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLITFRAMEBUFFEREXTPROC) (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
-#endif
-
-#ifndef GL_EXT_framebuffer_multisample
-#define GL_EXT_framebuffer_multisample 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glRenderbufferStorageMultisampleEXT (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC) (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
-#endif
-
-#ifndef GL_MESAX_texture_stack
-#define GL_MESAX_texture_stack 1
-#endif
-
-#ifndef GL_EXT_timer_query
-#define GL_EXT_timer_query 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetQueryObjecti64vEXT (GLuint id, GLenum pname, GLint64EXT *params);
-GLAPI void APIENTRY glGetQueryObjectui64vEXT (GLuint id, GLenum pname, GLuint64EXT *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETQUERYOBJECTI64VEXTPROC) (GLuint id, GLenum pname, GLint64EXT *params);
-typedef void (APIENTRYP PFNGLGETQUERYOBJECTUI64VEXTPROC) (GLuint id, GLenum pname, GLuint64EXT *params);
-#endif
-
-#ifndef GL_EXT_gpu_program_parameters
-#define GL_EXT_gpu_program_parameters 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProgramEnvParameters4fvEXT (GLenum target, GLuint index, GLsizei count, const GLfloat *params);
-GLAPI void APIENTRY glProgramLocalParameters4fvEXT (GLenum target, GLuint index, GLsizei count, const GLfloat *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERS4FVEXTPROC) (GLenum target, GLuint index, GLsizei count, const GLfloat *params);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERS4FVEXTPROC) (GLenum target, GLuint index, GLsizei count, const GLfloat *params);
-#endif
-
-#ifndef GL_APPLE_flush_buffer_range
-#define GL_APPLE_flush_buffer_range 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBufferParameteriAPPLE (GLenum target, GLenum pname, GLint param);
-GLAPI void APIENTRY glFlushMappedBufferRangeAPPLE (GLenum target, GLintptr offset, GLsizeiptr size);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBUFFERPARAMETERIAPPLEPROC) (GLenum target, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLFLUSHMAPPEDBUFFERRANGEAPPLEPROC) (GLenum target, GLintptr offset, GLsizeiptr size);
-#endif
-
-#ifndef GL_NV_gpu_program4
-#define GL_NV_gpu_program4 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProgramLocalParameterI4iNV (GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
-GLAPI void APIENTRY glProgramLocalParameterI4ivNV (GLenum target, GLuint index, const GLint *params);
-GLAPI void APIENTRY glProgramLocalParametersI4ivNV (GLenum target, GLuint index, GLsizei count, const GLint *params);
-GLAPI void APIENTRY glProgramLocalParameterI4uiNV (GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-GLAPI void APIENTRY glProgramLocalParameterI4uivNV (GLenum target, GLuint index, const GLuint *params);
-GLAPI void APIENTRY glProgramLocalParametersI4uivNV (GLenum target, GLuint index, GLsizei count, const GLuint *params);
-GLAPI void APIENTRY glProgramEnvParameterI4iNV (GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
-GLAPI void APIENTRY glProgramEnvParameterI4ivNV (GLenum target, GLuint index, const GLint *params);
-GLAPI void APIENTRY glProgramEnvParametersI4ivNV (GLenum target, GLuint index, GLsizei count, const GLint *params);
-GLAPI void APIENTRY glProgramEnvParameterI4uiNV (GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-GLAPI void APIENTRY glProgramEnvParameterI4uivNV (GLenum target, GLuint index, const GLuint *params);
-GLAPI void APIENTRY glProgramEnvParametersI4uivNV (GLenum target, GLuint index, GLsizei count, const GLuint *params);
-GLAPI void APIENTRY glGetProgramLocalParameterIivNV (GLenum target, GLuint index, GLint *params);
-GLAPI void APIENTRY glGetProgramLocalParameterIuivNV (GLenum target, GLuint index, GLuint *params);
-GLAPI void APIENTRY glGetProgramEnvParameterIivNV (GLenum target, GLuint index, GLint *params);
-GLAPI void APIENTRY glGetProgramEnvParameterIuivNV (GLenum target, GLuint index, GLuint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERI4INVPROC) (GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERI4IVNVPROC) (GLenum target, GLuint index, const GLint *params);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERSI4IVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLint *params);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERI4UINVPROC) (GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERI4UIVNVPROC) (GLenum target, GLuint index, const GLuint *params);
-typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERSI4UIVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLuint *params);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERI4INVPROC) (GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERI4IVNVPROC) (GLenum target, GLuint index, const GLint *params);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERSI4IVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLint *params);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERI4UINVPROC) (GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERI4UIVNVPROC) (GLenum target, GLuint index, const GLuint *params);
-typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERSI4UIVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLuint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMLOCALPARAMETERIIVNVPROC) (GLenum target, GLuint index, GLint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMLOCALPARAMETERIUIVNVPROC) (GLenum target, GLuint index, GLuint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMENVPARAMETERIIVNVPROC) (GLenum target, GLuint index, GLint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMENVPARAMETERIUIVNVPROC) (GLenum target, GLuint index, GLuint *params);
-#endif
-
-#ifndef GL_NV_geometry_program4
-#define GL_NV_geometry_program4 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProgramVertexLimitNV (GLenum target, GLint limit);
-GLAPI void APIENTRY glFramebufferTextureEXT (GLenum target, GLenum attachment, GLuint texture, GLint level);
-GLAPI void APIENTRY glFramebufferTextureLayerEXT (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
-GLAPI void APIENTRY glFramebufferTextureFaceEXT (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROGRAMVERTEXLIMITNVPROC) (GLenum target, GLint limit);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREEXTPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURELAYEREXTPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREFACEEXTPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face);
-#endif
-
-#ifndef GL_EXT_geometry_shader4
-#define GL_EXT_geometry_shader4 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProgramParameteriEXT (GLuint program, GLenum pname, GLint value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROGRAMPARAMETERIEXTPROC) (GLuint program, GLenum pname, GLint value);
-#endif
-
-#ifndef GL_NV_vertex_program4
-#define GL_NV_vertex_program4 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexAttribI1iEXT (GLuint index, GLint x);
-GLAPI void APIENTRY glVertexAttribI2iEXT (GLuint index, GLint x, GLint y);
-GLAPI void APIENTRY glVertexAttribI3iEXT (GLuint index, GLint x, GLint y, GLint z);
-GLAPI void APIENTRY glVertexAttribI4iEXT (GLuint index, GLint x, GLint y, GLint z, GLint w);
-GLAPI void APIENTRY glVertexAttribI1uiEXT (GLuint index, GLuint x);
-GLAPI void APIENTRY glVertexAttribI2uiEXT (GLuint index, GLuint x, GLuint y);
-GLAPI void APIENTRY glVertexAttribI3uiEXT (GLuint index, GLuint x, GLuint y, GLuint z);
-GLAPI void APIENTRY glVertexAttribI4uiEXT (GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-GLAPI void APIENTRY glVertexAttribI1ivEXT (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttribI2ivEXT (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttribI3ivEXT (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttribI4ivEXT (GLuint index, const GLint *v);
-GLAPI void APIENTRY glVertexAttribI1uivEXT (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttribI2uivEXT (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttribI3uivEXT (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttribI4uivEXT (GLuint index, const GLuint *v);
-GLAPI void APIENTRY glVertexAttribI4bvEXT (GLuint index, const GLbyte *v);
-GLAPI void APIENTRY glVertexAttribI4svEXT (GLuint index, const GLshort *v);
-GLAPI void APIENTRY glVertexAttribI4ubvEXT (GLuint index, const GLubyte *v);
-GLAPI void APIENTRY glVertexAttribI4usvEXT (GLuint index, const GLushort *v);
-GLAPI void APIENTRY glVertexAttribIPointerEXT (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glGetVertexAttribIivEXT (GLuint index, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVertexAttribIuivEXT (GLuint index, GLenum pname, GLuint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IEXTPROC) (GLuint index, GLint x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IEXTPROC) (GLuint index, GLint x, GLint y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IEXTPROC) (GLuint index, GLint x, GLint y, GLint z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IEXTPROC) (GLuint index, GLint x, GLint y, GLint z, GLint w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIEXTPROC) (GLuint index, GLuint x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIEXTPROC) (GLuint index, GLuint x, GLuint y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIEXTPROC) (GLuint index, GLuint x, GLuint y, GLuint z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIEXTPROC) (GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IVEXTPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IVEXTPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IVEXTPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IVEXTPROC) (GLuint index, const GLint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIVEXTPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIVEXTPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIVEXTPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIVEXTPROC) (GLuint index, const GLuint *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4BVEXTPROC) (GLuint index, const GLbyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4SVEXTPROC) (GLuint index, const GLshort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UBVEXTPROC) (GLuint index, const GLubyte *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBI4USVEXTPROC) (GLuint index, const GLushort *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBIPOINTEREXTPROC) (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIIVEXTPROC) (GLuint index, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIUIVEXTPROC) (GLuint index, GLenum pname, GLuint *params);
-#endif
-
-#ifndef GL_EXT_gpu_shader4
-#define GL_EXT_gpu_shader4 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetUniformuivEXT (GLuint program, GLint location, GLuint *params);
-GLAPI void APIENTRY glBindFragDataLocationEXT (GLuint program, GLuint color, const GLchar *name);
-GLAPI GLint APIENTRY glGetFragDataLocationEXT (GLuint program, const GLchar *name);
-GLAPI void APIENTRY glUniform1uiEXT (GLint location, GLuint v0);
-GLAPI void APIENTRY glUniform2uiEXT (GLint location, GLuint v0, GLuint v1);
-GLAPI void APIENTRY glUniform3uiEXT (GLint location, GLuint v0, GLuint v1, GLuint v2);
-GLAPI void APIENTRY glUniform4uiEXT (GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-GLAPI void APIENTRY glUniform1uivEXT (GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glUniform2uivEXT (GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glUniform3uivEXT (GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glUniform4uivEXT (GLint location, GLsizei count, const GLuint *value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETUNIFORMUIVEXTPROC) (GLuint program, GLint location, GLuint *params);
-typedef void (APIENTRYP PFNGLBINDFRAGDATALOCATIONEXTPROC) (GLuint program, GLuint color, const GLchar *name);
-typedef GLint (APIENTRYP PFNGLGETFRAGDATALOCATIONEXTPROC) (GLuint program, const GLchar *name);
-typedef void (APIENTRYP PFNGLUNIFORM1UIEXTPROC) (GLint location, GLuint v0);
-typedef void (APIENTRYP PFNGLUNIFORM2UIEXTPROC) (GLint location, GLuint v0, GLuint v1);
-typedef void (APIENTRYP PFNGLUNIFORM3UIEXTPROC) (GLint location, GLuint v0, GLuint v1, GLuint v2);
-typedef void (APIENTRYP PFNGLUNIFORM4UIEXTPROC) (GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-typedef void (APIENTRYP PFNGLUNIFORM1UIVEXTPROC) (GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLUNIFORM2UIVEXTPROC) (GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLUNIFORM3UIVEXTPROC) (GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLUNIFORM4UIVEXTPROC) (GLint location, GLsizei count, const GLuint *value);
-#endif
-
-#ifndef GL_EXT_draw_instanced
-#define GL_EXT_draw_instanced 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDrawArraysInstancedEXT (GLenum mode, GLint start, GLsizei count, GLsizei primcount);
-GLAPI void APIENTRY glDrawElementsInstancedEXT (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDEXTPROC) (GLenum mode, GLint start, GLsizei count, GLsizei primcount);
-typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDEXTPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
-#endif
-
-#ifndef GL_EXT_packed_float
-#define GL_EXT_packed_float 1
-#endif
-
-#ifndef GL_EXT_texture_array
-#define GL_EXT_texture_array 1
-#endif
-
-#ifndef GL_EXT_texture_buffer_object
-#define GL_EXT_texture_buffer_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTexBufferEXT (GLenum target, GLenum internalformat, GLuint buffer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXBUFFEREXTPROC) (GLenum target, GLenum internalformat, GLuint buffer);
-#endif
-
-#ifndef GL_EXT_texture_compression_latc
-#define GL_EXT_texture_compression_latc 1
-#endif
-
-#ifndef GL_EXT_texture_compression_rgtc
-#define GL_EXT_texture_compression_rgtc 1
-#endif
-
-#ifndef GL_EXT_texture_shared_exponent
-#define GL_EXT_texture_shared_exponent 1
-#endif
-
-#ifndef GL_NV_depth_buffer_float
-#define GL_NV_depth_buffer_float 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDepthRangedNV (GLdouble zNear, GLdouble zFar);
-GLAPI void APIENTRY glClearDepthdNV (GLdouble depth);
-GLAPI void APIENTRY glDepthBoundsdNV (GLdouble zmin, GLdouble zmax);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDEPTHRANGEDNVPROC) (GLdouble zNear, GLdouble zFar);
-typedef void (APIENTRYP PFNGLCLEARDEPTHDNVPROC) (GLdouble depth);
-typedef void (APIENTRYP PFNGLDEPTHBOUNDSDNVPROC) (GLdouble zmin, GLdouble zmax);
-#endif
-
-#ifndef GL_NV_fragment_program4
-#define GL_NV_fragment_program4 1
-#endif
-
-#ifndef GL_NV_framebuffer_multisample_coverage
-#define GL_NV_framebuffer_multisample_coverage 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glRenderbufferStorageMultisampleCoverageNV (GLenum target, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEMULTISAMPLECOVERAGENVPROC) (GLenum target, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height);
-#endif
-
-#ifndef GL_EXT_framebuffer_sRGB
-#define GL_EXT_framebuffer_sRGB 1
-#endif
-
-#ifndef GL_NV_geometry_shader4
-#define GL_NV_geometry_shader4 1
-#endif
-
-#ifndef GL_NV_parameter_buffer_object
-#define GL_NV_parameter_buffer_object 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProgramBufferParametersfvNV (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLfloat *params);
-GLAPI void APIENTRY glProgramBufferParametersIivNV (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLint *params);
-GLAPI void APIENTRY glProgramBufferParametersIuivNV (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLuint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROGRAMBUFFERPARAMETERSFVNVPROC) (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLfloat *params);
-typedef void (APIENTRYP PFNGLPROGRAMBUFFERPARAMETERSIIVNVPROC) (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLint *params);
-typedef void (APIENTRYP PFNGLPROGRAMBUFFERPARAMETERSIUIVNVPROC) (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLuint *params);
-#endif
-
-#ifndef GL_EXT_draw_buffers2
-#define GL_EXT_draw_buffers2 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glColorMaskIndexedEXT (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
-GLAPI void APIENTRY glGetBooleanIndexedvEXT (GLenum target, GLuint index, GLboolean *data);
-GLAPI void APIENTRY glGetIntegerIndexedvEXT (GLenum target, GLuint index, GLint *data);
-GLAPI void APIENTRY glEnableIndexedEXT (GLenum target, GLuint index);
-GLAPI void APIENTRY glDisableIndexedEXT (GLenum target, GLuint index);
-GLAPI GLboolean APIENTRY glIsEnabledIndexedEXT (GLenum target, GLuint index);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOLORMASKINDEXEDEXTPROC) (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
-typedef void (APIENTRYP PFNGLGETBOOLEANINDEXEDVEXTPROC) (GLenum target, GLuint index, GLboolean *data);
-typedef void (APIENTRYP PFNGLGETINTEGERINDEXEDVEXTPROC) (GLenum target, GLuint index, GLint *data);
-typedef void (APIENTRYP PFNGLENABLEINDEXEDEXTPROC) (GLenum target, GLuint index);
-typedef void (APIENTRYP PFNGLDISABLEINDEXEDEXTPROC) (GLenum target, GLuint index);
-typedef GLboolean (APIENTRYP PFNGLISENABLEDINDEXEDEXTPROC) (GLenum target, GLuint index);
-#endif
-
-#ifndef GL_NV_transform_feedback
-#define GL_NV_transform_feedback 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBeginTransformFeedbackNV (GLenum primitiveMode);
-GLAPI void APIENTRY glEndTransformFeedbackNV (void);
-GLAPI void APIENTRY glTransformFeedbackAttribsNV (GLuint count, const GLint *attribs, GLenum bufferMode);
-GLAPI void APIENTRY glBindBufferRangeNV (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
-GLAPI void APIENTRY glBindBufferOffsetNV (GLenum target, GLuint index, GLuint buffer, GLintptr offset);
-GLAPI void APIENTRY glBindBufferBaseNV (GLenum target, GLuint index, GLuint buffer);
-GLAPI void APIENTRY glTransformFeedbackVaryingsNV (GLuint program, GLsizei count, const GLint *locations, GLenum bufferMode);
-GLAPI void APIENTRY glActiveVaryingNV (GLuint program, const GLchar *name);
-GLAPI GLint APIENTRY glGetVaryingLocationNV (GLuint program, const GLchar *name);
-GLAPI void APIENTRY glGetActiveVaryingNV (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
-GLAPI void APIENTRY glGetTransformFeedbackVaryingNV (GLuint program, GLuint index, GLint *location);
-GLAPI void APIENTRY glTransformFeedbackStreamAttribsNV (GLsizei count, const GLint *attribs, GLsizei nbuffers, const GLint *bufstreams, GLenum bufferMode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBEGINTRANSFORMFEEDBACKNVPROC) (GLenum primitiveMode);
-typedef void (APIENTRYP PFNGLENDTRANSFORMFEEDBACKNVPROC) (void);
-typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKATTRIBSNVPROC) (GLuint count, const GLint *attribs, GLenum bufferMode);
-typedef void (APIENTRYP PFNGLBINDBUFFERRANGENVPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
-typedef void (APIENTRYP PFNGLBINDBUFFEROFFSETNVPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset);
-typedef void (APIENTRYP PFNGLBINDBUFFERBASENVPROC) (GLenum target, GLuint index, GLuint buffer);
-typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKVARYINGSNVPROC) (GLuint program, GLsizei count, const GLint *locations, GLenum bufferMode);
-typedef void (APIENTRYP PFNGLACTIVEVARYINGNVPROC) (GLuint program, const GLchar *name);
-typedef GLint (APIENTRYP PFNGLGETVARYINGLOCATIONNVPROC) (GLuint program, const GLchar *name);
-typedef void (APIENTRYP PFNGLGETACTIVEVARYINGNVPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
-typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKVARYINGNVPROC) (GLuint program, GLuint index, GLint *location);
-typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKSTREAMATTRIBSNVPROC) (GLsizei count, const GLint *attribs, GLsizei nbuffers, const GLint *bufstreams, GLenum bufferMode);
-#endif
-
-#ifndef GL_EXT_bindable_uniform
-#define GL_EXT_bindable_uniform 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glUniformBufferEXT (GLuint program, GLint location, GLuint buffer);
-GLAPI GLint APIENTRY glGetUniformBufferSizeEXT (GLuint program, GLint location);
-GLAPI GLintptr APIENTRY glGetUniformOffsetEXT (GLuint program, GLint location);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLUNIFORMBUFFEREXTPROC) (GLuint program, GLint location, GLuint buffer);
-typedef GLint (APIENTRYP PFNGLGETUNIFORMBUFFERSIZEEXTPROC) (GLuint program, GLint location);
-typedef GLintptr (APIENTRYP PFNGLGETUNIFORMOFFSETEXTPROC) (GLuint program, GLint location);
-#endif
-
-#ifndef GL_EXT_texture_integer
-#define GL_EXT_texture_integer 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTexParameterIivEXT (GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glTexParameterIuivEXT (GLenum target, GLenum pname, const GLuint *params);
-GLAPI void APIENTRY glGetTexParameterIivEXT (GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetTexParameterIuivEXT (GLenum target, GLenum pname, GLuint *params);
-GLAPI void APIENTRY glClearColorIiEXT (GLint red, GLint green, GLint blue, GLint alpha);
-GLAPI void APIENTRY glClearColorIuiEXT (GLuint red, GLuint green, GLuint blue, GLuint alpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXPARAMETERIIVEXTPROC) (GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLTEXPARAMETERIUIVEXTPROC) (GLenum target, GLenum pname, const GLuint *params);
-typedef void (APIENTRYP PFNGLGETTEXPARAMETERIIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETTEXPARAMETERIUIVEXTPROC) (GLenum target, GLenum pname, GLuint *params);
-typedef void (APIENTRYP PFNGLCLEARCOLORIIEXTPROC) (GLint red, GLint green, GLint blue, GLint alpha);
-typedef void (APIENTRYP PFNGLCLEARCOLORIUIEXTPROC) (GLuint red, GLuint green, GLuint blue, GLuint alpha);
-#endif
-
-#ifndef GL_GREMEDY_frame_terminator
-#define GL_GREMEDY_frame_terminator 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glFrameTerminatorGREMEDY (void);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLFRAMETERMINATORGREMEDYPROC) (void);
-#endif
-
-#ifndef GL_NV_conditional_render
-#define GL_NV_conditional_render 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBeginConditionalRenderNV (GLuint id, GLenum mode);
-GLAPI void APIENTRY glEndConditionalRenderNV (void);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBEGINCONDITIONALRENDERNVPROC) (GLuint id, GLenum mode);
-typedef void (APIENTRYP PFNGLENDCONDITIONALRENDERNVPROC) (void);
-#endif
-
-#ifndef GL_NV_present_video
-#define GL_NV_present_video 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glPresentFrameKeyedNV (GLuint video_slot, GLuint64EXT minPresentTime, GLuint beginPresentTimeId, GLuint presentDurationId, GLenum type, GLenum target0, GLuint fill0, GLuint key0, GLenum target1, GLuint fill1, GLuint key1);
-GLAPI void APIENTRY glPresentFrameDualFillNV (GLuint video_slot, GLuint64EXT minPresentTime, GLuint beginPresentTimeId, GLuint presentDurationId, GLenum type, GLenum target0, GLuint fill0, GLenum target1, GLuint fill1, GLenum target2, GLuint fill2, GLenum target3, GLuint fill3);
-GLAPI void APIENTRY glGetVideoivNV (GLuint video_slot, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVideouivNV (GLuint video_slot, GLenum pname, GLuint *params);
-GLAPI void APIENTRY glGetVideoi64vNV (GLuint video_slot, GLenum pname, GLint64EXT *params);
-GLAPI void APIENTRY glGetVideoui64vNV (GLuint video_slot, GLenum pname, GLuint64EXT *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPRESENTFRAMEKEYEDNVPROC) (GLuint video_slot, GLuint64EXT minPresentTime, GLuint beginPresentTimeId, GLuint presentDurationId, GLenum type, GLenum target0, GLuint fill0, GLuint key0, GLenum target1, GLuint fill1, GLuint key1);
-typedef void (APIENTRYP PFNGLPRESENTFRAMEDUALFILLNVPROC) (GLuint video_slot, GLuint64EXT minPresentTime, GLuint beginPresentTimeId, GLuint presentDurationId, GLenum type, GLenum target0, GLuint fill0, GLenum target1, GLuint fill1, GLenum target2, GLuint fill2, GLenum target3, GLuint fill3);
-typedef void (APIENTRYP PFNGLGETVIDEOIVNVPROC) (GLuint video_slot, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVIDEOUIVNVPROC) (GLuint video_slot, GLenum pname, GLuint *params);
-typedef void (APIENTRYP PFNGLGETVIDEOI64VNVPROC) (GLuint video_slot, GLenum pname, GLint64EXT *params);
-typedef void (APIENTRYP PFNGLGETVIDEOUI64VNVPROC) (GLuint video_slot, GLenum pname, GLuint64EXT *params);
-#endif
-
-#ifndef GL_EXT_transform_feedback
-#define GL_EXT_transform_feedback 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBeginTransformFeedbackEXT (GLenum primitiveMode);
-GLAPI void APIENTRY glEndTransformFeedbackEXT (void);
-GLAPI void APIENTRY glBindBufferRangeEXT (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
-GLAPI void APIENTRY glBindBufferOffsetEXT (GLenum target, GLuint index, GLuint buffer, GLintptr offset);
-GLAPI void APIENTRY glBindBufferBaseEXT (GLenum target, GLuint index, GLuint buffer);
-GLAPI void APIENTRY glTransformFeedbackVaryingsEXT (GLuint program, GLsizei count, const GLchar* *varyings, GLenum bufferMode);
-GLAPI void APIENTRY glGetTransformFeedbackVaryingEXT (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBEGINTRANSFORMFEEDBACKEXTPROC) (GLenum primitiveMode);
-typedef void (APIENTRYP PFNGLENDTRANSFORMFEEDBACKEXTPROC) (void);
-typedef void (APIENTRYP PFNGLBINDBUFFERRANGEEXTPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
-typedef void (APIENTRYP PFNGLBINDBUFFEROFFSETEXTPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset);
-typedef void (APIENTRYP PFNGLBINDBUFFERBASEEXTPROC) (GLenum target, GLuint index, GLuint buffer);
-typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKVARYINGSEXTPROC) (GLuint program, GLsizei count, const GLchar* *varyings, GLenum bufferMode);
-typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKVARYINGEXTPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
-#endif
-
-#ifndef GL_EXT_direct_state_access
-#define GL_EXT_direct_state_access 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glClientAttribDefaultEXT (GLbitfield mask);
-GLAPI void APIENTRY glPushClientAttribDefaultEXT (GLbitfield mask);
-GLAPI void APIENTRY glMatrixLoadfEXT (GLenum mode, const GLfloat *m);
-GLAPI void APIENTRY glMatrixLoaddEXT (GLenum mode, const GLdouble *m);
-GLAPI void APIENTRY glMatrixMultfEXT (GLenum mode, const GLfloat *m);
-GLAPI void APIENTRY glMatrixMultdEXT (GLenum mode, const GLdouble *m);
-GLAPI void APIENTRY glMatrixLoadIdentityEXT (GLenum mode);
-GLAPI void APIENTRY glMatrixRotatefEXT (GLenum mode, GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glMatrixRotatedEXT (GLenum mode, GLdouble angle, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glMatrixScalefEXT (GLenum mode, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glMatrixScaledEXT (GLenum mode, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glMatrixTranslatefEXT (GLenum mode, GLfloat x, GLfloat y, GLfloat z);
-GLAPI void APIENTRY glMatrixTranslatedEXT (GLenum mode, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glMatrixFrustumEXT (GLenum mode, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
-GLAPI void APIENTRY glMatrixOrthoEXT (GLenum mode, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
-GLAPI void APIENTRY glMatrixPopEXT (GLenum mode);
-GLAPI void APIENTRY glMatrixPushEXT (GLenum mode);
-GLAPI void APIENTRY glMatrixLoadTransposefEXT (GLenum mode, const GLfloat *m);
-GLAPI void APIENTRY glMatrixLoadTransposedEXT (GLenum mode, const GLdouble *m);
-GLAPI void APIENTRY glMatrixMultTransposefEXT (GLenum mode, const GLfloat *m);
-GLAPI void APIENTRY glMatrixMultTransposedEXT (GLenum mode, const GLdouble *m);
-GLAPI void APIENTRY glTextureParameterfEXT (GLuint texture, GLenum target, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glTextureParameterfvEXT (GLuint texture, GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glTextureParameteriEXT (GLuint texture, GLenum target, GLenum pname, GLint param);
-GLAPI void APIENTRY glTextureParameterivEXT (GLuint texture, GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glTextureImage1DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glTextureImage2DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glTextureSubImage1DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glTextureSubImage2DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glCopyTextureImage1DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
-GLAPI void APIENTRY glCopyTextureImage2DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
-GLAPI void APIENTRY glCopyTextureSubImage1DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
-GLAPI void APIENTRY glCopyTextureSubImage2DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glGetTextureImageEXT (GLuint texture, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
-GLAPI void APIENTRY glGetTextureParameterfvEXT (GLuint texture, GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetTextureParameterivEXT (GLuint texture, GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetTextureLevelParameterfvEXT (GLuint texture, GLenum target, GLint level, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetTextureLevelParameterivEXT (GLuint texture, GLenum target, GLint level, GLenum pname, GLint *params);
-GLAPI void APIENTRY glTextureImage3DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glTextureSubImage3DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glCopyTextureSubImage3DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glMultiTexParameterfEXT (GLenum texunit, GLenum target, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glMultiTexParameterfvEXT (GLenum texunit, GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glMultiTexParameteriEXT (GLenum texunit, GLenum target, GLenum pname, GLint param);
-GLAPI void APIENTRY glMultiTexParameterivEXT (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glMultiTexImage1DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glMultiTexImage2DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glMultiTexSubImage1DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glMultiTexSubImage2DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glCopyMultiTexImage1DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
-GLAPI void APIENTRY glCopyMultiTexImage2DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
-GLAPI void APIENTRY glCopyMultiTexSubImage1DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
-GLAPI void APIENTRY glCopyMultiTexSubImage2DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glGetMultiTexImageEXT (GLenum texunit, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
-GLAPI void APIENTRY glGetMultiTexParameterfvEXT (GLenum texunit, GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetMultiTexParameterivEXT (GLenum texunit, GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetMultiTexLevelParameterfvEXT (GLenum texunit, GLenum target, GLint level, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetMultiTexLevelParameterivEXT (GLenum texunit, GLenum target, GLint level, GLenum pname, GLint *params);
-GLAPI void APIENTRY glMultiTexImage3DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glMultiTexSubImage3DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
-GLAPI void APIENTRY glCopyMultiTexSubImage3DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glBindMultiTextureEXT (GLenum texunit, GLenum target, GLuint texture);
-GLAPI void APIENTRY glEnableClientStateIndexedEXT (GLenum array, GLuint index);
-GLAPI void APIENTRY glDisableClientStateIndexedEXT (GLenum array, GLuint index);
-GLAPI void APIENTRY glMultiTexCoordPointerEXT (GLenum texunit, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glMultiTexEnvfEXT (GLenum texunit, GLenum target, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glMultiTexEnvfvEXT (GLenum texunit, GLenum target, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glMultiTexEnviEXT (GLenum texunit, GLenum target, GLenum pname, GLint param);
-GLAPI void APIENTRY glMultiTexEnvivEXT (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glMultiTexGendEXT (GLenum texunit, GLenum coord, GLenum pname, GLdouble param);
-GLAPI void APIENTRY glMultiTexGendvEXT (GLenum texunit, GLenum coord, GLenum pname, const GLdouble *params);
-GLAPI void APIENTRY glMultiTexGenfEXT (GLenum texunit, GLenum coord, GLenum pname, GLfloat param);
-GLAPI void APIENTRY glMultiTexGenfvEXT (GLenum texunit, GLenum coord, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glMultiTexGeniEXT (GLenum texunit, GLenum coord, GLenum pname, GLint param);
-GLAPI void APIENTRY glMultiTexGenivEXT (GLenum texunit, GLenum coord, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glGetMultiTexEnvfvEXT (GLenum texunit, GLenum target, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetMultiTexEnvivEXT (GLenum texunit, GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetMultiTexGendvEXT (GLenum texunit, GLenum coord, GLenum pname, GLdouble *params);
-GLAPI void APIENTRY glGetMultiTexGenfvEXT (GLenum texunit, GLenum coord, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetMultiTexGenivEXT (GLenum texunit, GLenum coord, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetFloatIndexedvEXT (GLenum target, GLuint index, GLfloat *data);
-GLAPI void APIENTRY glGetDoubleIndexedvEXT (GLenum target, GLuint index, GLdouble *data);
-GLAPI void APIENTRY glGetPointerIndexedvEXT (GLenum target, GLuint index, GLvoid* *data);
-GLAPI void APIENTRY glCompressedTextureImage3DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedTextureImage2DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedTextureImage1DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedTextureSubImage3DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedTextureSubImage2DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedTextureSubImage1DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glGetCompressedTextureImageEXT (GLuint texture, GLenum target, GLint lod, GLvoid *img);
-GLAPI void APIENTRY glCompressedMultiTexImage3DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedMultiTexImage2DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedMultiTexImage1DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedMultiTexSubImage3DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedMultiTexSubImage2DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glCompressedMultiTexSubImage1DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *bits);
-GLAPI void APIENTRY glGetCompressedMultiTexImageEXT (GLenum texunit, GLenum target, GLint lod, GLvoid *img);
-GLAPI void APIENTRY glNamedProgramStringEXT (GLuint program, GLenum target, GLenum format, GLsizei len, const GLvoid *string);
-GLAPI void APIENTRY glNamedProgramLocalParameter4dEXT (GLuint program, GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glNamedProgramLocalParameter4dvEXT (GLuint program, GLenum target, GLuint index, const GLdouble *params);
-GLAPI void APIENTRY glNamedProgramLocalParameter4fEXT (GLuint program, GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-GLAPI void APIENTRY glNamedProgramLocalParameter4fvEXT (GLuint program, GLenum target, GLuint index, const GLfloat *params);
-GLAPI void APIENTRY glGetNamedProgramLocalParameterdvEXT (GLuint program, GLenum target, GLuint index, GLdouble *params);
-GLAPI void APIENTRY glGetNamedProgramLocalParameterfvEXT (GLuint program, GLenum target, GLuint index, GLfloat *params);
-GLAPI void APIENTRY glGetNamedProgramivEXT (GLuint program, GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetNamedProgramStringEXT (GLuint program, GLenum target, GLenum pname, GLvoid *string);
-GLAPI void APIENTRY glNamedProgramLocalParameters4fvEXT (GLuint program, GLenum target, GLuint index, GLsizei count, const GLfloat *params);
-GLAPI void APIENTRY glNamedProgramLocalParameterI4iEXT (GLuint program, GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
-GLAPI void APIENTRY glNamedProgramLocalParameterI4ivEXT (GLuint program, GLenum target, GLuint index, const GLint *params);
-GLAPI void APIENTRY glNamedProgramLocalParametersI4ivEXT (GLuint program, GLenum target, GLuint index, GLsizei count, const GLint *params);
-GLAPI void APIENTRY glNamedProgramLocalParameterI4uiEXT (GLuint program, GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-GLAPI void APIENTRY glNamedProgramLocalParameterI4uivEXT (GLuint program, GLenum target, GLuint index, const GLuint *params);
-GLAPI void APIENTRY glNamedProgramLocalParametersI4uivEXT (GLuint program, GLenum target, GLuint index, GLsizei count, const GLuint *params);
-GLAPI void APIENTRY glGetNamedProgramLocalParameterIivEXT (GLuint program, GLenum target, GLuint index, GLint *params);
-GLAPI void APIENTRY glGetNamedProgramLocalParameterIuivEXT (GLuint program, GLenum target, GLuint index, GLuint *params);
-GLAPI void APIENTRY glTextureParameterIivEXT (GLuint texture, GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glTextureParameterIuivEXT (GLuint texture, GLenum target, GLenum pname, const GLuint *params);
-GLAPI void APIENTRY glGetTextureParameterIivEXT (GLuint texture, GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetTextureParameterIuivEXT (GLuint texture, GLenum target, GLenum pname, GLuint *params);
-GLAPI void APIENTRY glMultiTexParameterIivEXT (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glMultiTexParameterIuivEXT (GLenum texunit, GLenum target, GLenum pname, const GLuint *params);
-GLAPI void APIENTRY glGetMultiTexParameterIivEXT (GLenum texunit, GLenum target, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetMultiTexParameterIuivEXT (GLenum texunit, GLenum target, GLenum pname, GLuint *params);
-GLAPI void APIENTRY glProgramUniform1fEXT (GLuint program, GLint location, GLfloat v0);
-GLAPI void APIENTRY glProgramUniform2fEXT (GLuint program, GLint location, GLfloat v0, GLfloat v1);
-GLAPI void APIENTRY glProgramUniform3fEXT (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
-GLAPI void APIENTRY glProgramUniform4fEXT (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-GLAPI void APIENTRY glProgramUniform1iEXT (GLuint program, GLint location, GLint v0);
-GLAPI void APIENTRY glProgramUniform2iEXT (GLuint program, GLint location, GLint v0, GLint v1);
-GLAPI void APIENTRY glProgramUniform3iEXT (GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
-GLAPI void APIENTRY glProgramUniform4iEXT (GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
-GLAPI void APIENTRY glProgramUniform1fvEXT (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform2fvEXT (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform3fvEXT (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform4fvEXT (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform1ivEXT (GLuint program, GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glProgramUniform2ivEXT (GLuint program, GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glProgramUniform3ivEXT (GLuint program, GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glProgramUniform4ivEXT (GLuint program, GLint location, GLsizei count, const GLint *value);
-GLAPI void APIENTRY glProgramUniformMatrix2fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix3fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix4fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix2x3fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix3x2fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix2x4fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix4x2fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix3x4fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniformMatrix4x3fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-GLAPI void APIENTRY glProgramUniform1uiEXT (GLuint program, GLint location, GLuint v0);
-GLAPI void APIENTRY glProgramUniform2uiEXT (GLuint program, GLint location, GLuint v0, GLuint v1);
-GLAPI void APIENTRY glProgramUniform3uiEXT (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
-GLAPI void APIENTRY glProgramUniform4uiEXT (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-GLAPI void APIENTRY glProgramUniform1uivEXT (GLuint program, GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glProgramUniform2uivEXT (GLuint program, GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glProgramUniform3uivEXT (GLuint program, GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glProgramUniform4uivEXT (GLuint program, GLint location, GLsizei count, const GLuint *value);
-GLAPI void APIENTRY glNamedBufferDataEXT (GLuint buffer, GLsizeiptr size, const GLvoid *data, GLenum usage);
-GLAPI void APIENTRY glNamedBufferSubDataEXT (GLuint buffer, GLintptr offset, GLsizeiptr size, const GLvoid *data);
-GLAPI GLvoid* APIENTRY glMapNamedBufferEXT (GLuint buffer, GLenum access);
-GLAPI GLboolean APIENTRY glUnmapNamedBufferEXT (GLuint buffer);
-GLAPI GLvoid* APIENTRY glMapNamedBufferRangeEXT (GLuint buffer, GLintptr offset, GLsizeiptr length, GLbitfield access);
-GLAPI void APIENTRY glFlushMappedNamedBufferRangeEXT (GLuint buffer, GLintptr offset, GLsizeiptr length);
-GLAPI void APIENTRY glNamedCopyBufferSubDataEXT (GLuint readBuffer, GLuint writeBuffer, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
-GLAPI void APIENTRY glGetNamedBufferParameterivEXT (GLuint buffer, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetNamedBufferPointervEXT (GLuint buffer, GLenum pname, GLvoid* *params);
-GLAPI void APIENTRY glGetNamedBufferSubDataEXT (GLuint buffer, GLintptr offset, GLsizeiptr size, GLvoid *data);
-GLAPI void APIENTRY glTextureBufferEXT (GLuint texture, GLenum target, GLenum internalformat, GLuint buffer);
-GLAPI void APIENTRY glMultiTexBufferEXT (GLenum texunit, GLenum target, GLenum internalformat, GLuint buffer);
-GLAPI void APIENTRY glNamedRenderbufferStorageEXT (GLuint renderbuffer, GLenum internalformat, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glGetNamedRenderbufferParameterivEXT (GLuint renderbuffer, GLenum pname, GLint *params);
-GLAPI GLenum APIENTRY glCheckNamedFramebufferStatusEXT (GLuint framebuffer, GLenum target);
-GLAPI void APIENTRY glNamedFramebufferTexture1DEXT (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-GLAPI void APIENTRY glNamedFramebufferTexture2DEXT (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-GLAPI void APIENTRY glNamedFramebufferTexture3DEXT (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
-GLAPI void APIENTRY glNamedFramebufferRenderbufferEXT (GLuint framebuffer, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
-GLAPI void APIENTRY glGetNamedFramebufferAttachmentParameterivEXT (GLuint framebuffer, GLenum attachment, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGenerateTextureMipmapEXT (GLuint texture, GLenum target);
-GLAPI void APIENTRY glGenerateMultiTexMipmapEXT (GLenum texunit, GLenum target);
-GLAPI void APIENTRY glFramebufferDrawBufferEXT (GLuint framebuffer, GLenum mode);
-GLAPI void APIENTRY glFramebufferDrawBuffersEXT (GLuint framebuffer, GLsizei n, const GLenum *bufs);
-GLAPI void APIENTRY glFramebufferReadBufferEXT (GLuint framebuffer, GLenum mode);
-GLAPI void APIENTRY glGetFramebufferParameterivEXT (GLuint framebuffer, GLenum pname, GLint *params);
-GLAPI void APIENTRY glNamedRenderbufferStorageMultisampleEXT (GLuint renderbuffer, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glNamedRenderbufferStorageMultisampleCoverageEXT (GLuint renderbuffer, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height);
-GLAPI void APIENTRY glNamedFramebufferTextureEXT (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level);
-GLAPI void APIENTRY glNamedFramebufferTextureLayerEXT (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLint layer);
-GLAPI void APIENTRY glNamedFramebufferTextureFaceEXT (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLenum face);
-GLAPI void APIENTRY glTextureRenderbufferEXT (GLuint texture, GLenum target, GLuint renderbuffer);
-GLAPI void APIENTRY glMultiTexRenderbufferEXT (GLenum texunit, GLenum target, GLuint renderbuffer);
-GLAPI void APIENTRY glProgramUniform1dEXT (GLuint program, GLint location, GLdouble x);
-GLAPI void APIENTRY glProgramUniform2dEXT (GLuint program, GLint location, GLdouble x, GLdouble y);
-GLAPI void APIENTRY glProgramUniform3dEXT (GLuint program, GLint location, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glProgramUniform4dEXT (GLuint program, GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glProgramUniform1dvEXT (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniform2dvEXT (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniform3dvEXT (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniform4dvEXT (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix2dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix3dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix4dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix2x3dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix2x4dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix3x2dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix3x4dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix4x2dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-GLAPI void APIENTRY glProgramUniformMatrix4x3dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCLIENTATTRIBDEFAULTEXTPROC) (GLbitfield mask);
-typedef void (APIENTRYP PFNGLPUSHCLIENTATTRIBDEFAULTEXTPROC) (GLbitfield mask);
-typedef void (APIENTRYP PFNGLMATRIXLOADFEXTPROC) (GLenum mode, const GLfloat *m);
-typedef void (APIENTRYP PFNGLMATRIXLOADDEXTPROC) (GLenum mode, const GLdouble *m);
-typedef void (APIENTRYP PFNGLMATRIXMULTFEXTPROC) (GLenum mode, const GLfloat *m);
-typedef void (APIENTRYP PFNGLMATRIXMULTDEXTPROC) (GLenum mode, const GLdouble *m);
-typedef void (APIENTRYP PFNGLMATRIXLOADIDENTITYEXTPROC) (GLenum mode);
-typedef void (APIENTRYP PFNGLMATRIXROTATEFEXTPROC) (GLenum mode, GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLMATRIXROTATEDEXTPROC) (GLenum mode, GLdouble angle, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLMATRIXSCALEFEXTPROC) (GLenum mode, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLMATRIXSCALEDEXTPROC) (GLenum mode, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLMATRIXTRANSLATEFEXTPROC) (GLenum mode, GLfloat x, GLfloat y, GLfloat z);
-typedef void (APIENTRYP PFNGLMATRIXTRANSLATEDEXTPROC) (GLenum mode, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLMATRIXFRUSTUMEXTPROC) (GLenum mode, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
-typedef void (APIENTRYP PFNGLMATRIXORTHOEXTPROC) (GLenum mode, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
-typedef void (APIENTRYP PFNGLMATRIXPOPEXTPROC) (GLenum mode);
-typedef void (APIENTRYP PFNGLMATRIXPUSHEXTPROC) (GLenum mode);
-typedef void (APIENTRYP PFNGLMATRIXLOADTRANSPOSEFEXTPROC) (GLenum mode, const GLfloat *m);
-typedef void (APIENTRYP PFNGLMATRIXLOADTRANSPOSEDEXTPROC) (GLenum mode, const GLdouble *m);
-typedef void (APIENTRYP PFNGLMATRIXMULTTRANSPOSEFEXTPROC) (GLenum mode, const GLfloat *m);
-typedef void (APIENTRYP PFNGLMATRIXMULTTRANSPOSEDEXTPROC) (GLenum mode, const GLdouble *m);
-typedef void (APIENTRYP PFNGLTEXTUREPARAMETERFEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLTEXTUREPARAMETERFVEXTPROC) (GLuint texture, GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLTEXTUREIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLTEXTUREIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLCOPYTEXTUREIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
-typedef void (APIENTRYP PFNGLCOPYTEXTUREIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
-typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
-typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLGETTEXTUREIMAGEEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
-typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERFVEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETTEXTURELEVELPARAMETERFVEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETTEXTURELEVELPARAMETERIVEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLTEXTUREIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLMULTITEXPARAMETERFEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLMULTITEXPARAMETERFVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLMULTITEXPARAMETERIEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLMULTITEXPARAMETERIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLMULTITEXIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLMULTITEXIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLMULTITEXSUBIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLMULTITEXSUBIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLCOPYMULTITEXIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
-typedef void (APIENTRYP PFNGLCOPYMULTITEXIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
-typedef void (APIENTRYP PFNGLCOPYMULTITEXSUBIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
-typedef void (APIENTRYP PFNGLCOPYMULTITEXSUBIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLGETMULTITEXIMAGEEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
-typedef void (APIENTRYP PFNGLGETMULTITEXPARAMETERFVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXPARAMETERIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXLEVELPARAMETERFVEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXLEVELPARAMETERIVEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLMULTITEXIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLMULTITEXSUBIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
-typedef void (APIENTRYP PFNGLCOPYMULTITEXSUBIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLBINDMULTITEXTUREEXTPROC) (GLenum texunit, GLenum target, GLuint texture);
-typedef void (APIENTRYP PFNGLENABLECLIENTSTATEINDEXEDEXTPROC) (GLenum array, GLuint index);
-typedef void (APIENTRYP PFNGLDISABLECLIENTSTATEINDEXEDEXTPROC) (GLenum array, GLuint index);
-typedef void (APIENTRYP PFNGLMULTITEXCOORDPOINTEREXTPROC) (GLenum texunit, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLMULTITEXENVFEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLMULTITEXENVFVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLMULTITEXENVIEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLMULTITEXENVIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLMULTITEXGENDEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLdouble param);
-typedef void (APIENTRYP PFNGLMULTITEXGENDVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, const GLdouble *params);
-typedef void (APIENTRYP PFNGLMULTITEXGENFEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLfloat param);
-typedef void (APIENTRYP PFNGLMULTITEXGENFVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLMULTITEXGENIEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLint param);
-typedef void (APIENTRYP PFNGLMULTITEXGENIVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXENVFVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXENVIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXGENDVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLdouble *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXGENFVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXGENIVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETFLOATINDEXEDVEXTPROC) (GLenum target, GLuint index, GLfloat *data);
-typedef void (APIENTRYP PFNGLGETDOUBLEINDEXEDVEXTPROC) (GLenum target, GLuint index, GLdouble *data);
-typedef void (APIENTRYP PFNGLGETPOINTERINDEXEDVEXTPROC) (GLenum target, GLuint index, GLvoid* *data);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTUREIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTUREIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTUREIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXTUREIMAGEEXTPROC) (GLuint texture, GLenum target, GLint lod, GLvoid *img);
-typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXSUBIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXSUBIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXSUBIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *bits);
-typedef void (APIENTRYP PFNGLGETCOMPRESSEDMULTITEXIMAGEEXTPROC) (GLenum texunit, GLenum target, GLint lod, GLvoid *img);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMSTRINGEXTPROC) (GLuint program, GLenum target, GLenum format, GLsizei len, const GLvoid *string);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETER4DEXTPROC) (GLuint program, GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETER4DVEXTPROC) (GLuint program, GLenum target, GLuint index, const GLdouble *params);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETER4FEXTPROC) (GLuint program, GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETER4FVEXTPROC) (GLuint program, GLenum target, GLuint index, const GLfloat *params);
-typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMLOCALPARAMETERDVEXTPROC) (GLuint program, GLenum target, GLuint index, GLdouble *params);
-typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMLOCALPARAMETERFVEXTPROC) (GLuint program, GLenum target, GLuint index, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMIVEXTPROC) (GLuint program, GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMSTRINGEXTPROC) (GLuint program, GLenum target, GLenum pname, GLvoid *string);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERS4FVEXTPROC) (GLuint program, GLenum target, GLuint index, GLsizei count, const GLfloat *params);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERI4IEXTPROC) (GLuint program, GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERI4IVEXTPROC) (GLuint program, GLenum target, GLuint index, const GLint *params);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERSI4IVEXTPROC) (GLuint program, GLenum target, GLuint index, GLsizei count, const GLint *params);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERI4UIEXTPROC) (GLuint program, GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERI4UIVEXTPROC) (GLuint program, GLenum target, GLuint index, const GLuint *params);
-typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERSI4UIVEXTPROC) (GLuint program, GLenum target, GLuint index, GLsizei count, const GLuint *params);
-typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMLOCALPARAMETERIIVEXTPROC) (GLuint program, GLenum target, GLuint index, GLint *params);
-typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMLOCALPARAMETERIUIVEXTPROC) (GLuint program, GLenum target, GLuint index, GLuint *params);
-typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIUIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, const GLuint *params);
-typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIUIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLuint *params);
-typedef void (APIENTRYP PFNGLMULTITEXPARAMETERIIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLMULTITEXPARAMETERIUIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLuint *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXPARAMETERIIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETMULTITEXPARAMETERIUIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLuint *params);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FEXTPROC) (GLuint program, GLint location, GLfloat v0);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FEXTPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FEXTPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FEXTPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IEXTPROC) (GLuint program, GLint location, GLint v0);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IEXTPROC) (GLuint program, GLint location, GLint v0, GLint v1);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IEXTPROC) (GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IEXTPROC) (GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIEXTPROC) (GLuint program, GLint location, GLuint v0);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIEXTPROC) (GLuint program, GLint location, GLuint v0, GLuint v1);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIEXTPROC) (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIEXTPROC) (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
-typedef void (APIENTRYP PFNGLNAMEDBUFFERDATAEXTPROC) (GLuint buffer, GLsizeiptr size, const GLvoid *data, GLenum usage);
-typedef void (APIENTRYP PFNGLNAMEDBUFFERSUBDATAEXTPROC) (GLuint buffer, GLintptr offset, GLsizeiptr size, const GLvoid *data);
-typedef GLvoid* (APIENTRYP PFNGLMAPNAMEDBUFFEREXTPROC) (GLuint buffer, GLenum access);
-typedef GLboolean (APIENTRYP PFNGLUNMAPNAMEDBUFFEREXTPROC) (GLuint buffer);
-typedef GLvoid* (APIENTRYP PFNGLMAPNAMEDBUFFERRANGEEXTPROC) (GLuint buffer, GLintptr offset, GLsizeiptr length, GLbitfield access);
-typedef void (APIENTRYP PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEEXTPROC) (GLuint buffer, GLintptr offset, GLsizeiptr length);
-typedef void (APIENTRYP PFNGLNAMEDCOPYBUFFERSUBDATAEXTPROC) (GLuint readBuffer, GLuint writeBuffer, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
-typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPARAMETERIVEXTPROC) (GLuint buffer, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPOINTERVEXTPROC) (GLuint buffer, GLenum pname, GLvoid* *params);
-typedef void (APIENTRYP PFNGLGETNAMEDBUFFERSUBDATAEXTPROC) (GLuint buffer, GLintptr offset, GLsizeiptr size, GLvoid *data);
-typedef void (APIENTRYP PFNGLTEXTUREBUFFEREXTPROC) (GLuint texture, GLenum target, GLenum internalformat, GLuint buffer);
-typedef void (APIENTRYP PFNGLMULTITEXBUFFEREXTPROC) (GLenum texunit, GLenum target, GLenum internalformat, GLuint buffer);
-typedef void (APIENTRYP PFNGLNAMEDRENDERBUFFERSTORAGEEXTPROC) (GLuint renderbuffer, GLenum internalformat, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLGETNAMEDRENDERBUFFERPARAMETERIVEXTPROC) (GLuint renderbuffer, GLenum pname, GLint *params);
-typedef GLenum (APIENTRYP PFNGLCHECKNAMEDFRAMEBUFFERSTATUSEXTPROC) (GLuint framebuffer, GLenum target);
-typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURE1DEXTPROC) (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURE2DEXTPROC) (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURE3DEXTPROC) (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
-typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERRENDERBUFFEREXTPROC) (GLuint framebuffer, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLGETNAMEDFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) (GLuint framebuffer, GLenum attachment, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGENERATETEXTUREMIPMAPEXTPROC) (GLuint texture, GLenum target);
-typedef void (APIENTRYP PFNGLGENERATEMULTITEXMIPMAPEXTPROC) (GLenum texunit, GLenum target);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERDRAWBUFFEREXTPROC) (GLuint framebuffer, GLenum mode);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERDRAWBUFFERSEXTPROC) (GLuint framebuffer, GLsizei n, const GLenum *bufs);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERREADBUFFEREXTPROC) (GLuint framebuffer, GLenum mode);
-typedef void (APIENTRYP PFNGLGETFRAMEBUFFERPARAMETERIVEXTPROC) (GLuint framebuffer, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLNAMEDRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC) (GLuint renderbuffer, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLNAMEDRENDERBUFFERSTORAGEMULTISAMPLECOVERAGEEXTPROC) (GLuint renderbuffer, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTUREEXTPROC) (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level);
-typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURELAYEREXTPROC) (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLint layer);
-typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTUREFACEEXTPROC) (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLenum face);
-typedef void (APIENTRYP PFNGLTEXTURERENDERBUFFEREXTPROC) (GLuint texture, GLenum target, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLMULTITEXRENDERBUFFEREXTPROC) (GLenum texunit, GLenum target, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DEXTPROC) (GLuint program, GLint location, GLdouble x);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DEXTPROC) (GLuint program, GLint location, GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DEXTPROC) (GLuint program, GLint location, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DEXTPROC) (GLuint program, GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
-#endif
-
-#ifndef GL_EXT_vertex_array_bgra
-#define GL_EXT_vertex_array_bgra 1
-#endif
-
-#ifndef GL_EXT_texture_swizzle
-#define GL_EXT_texture_swizzle 1
-#endif
-
-#ifndef GL_NV_explicit_multisample
-#define GL_NV_explicit_multisample 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetMultisamplefvNV (GLenum pname, GLuint index, GLfloat *val);
-GLAPI void APIENTRY glSampleMaskIndexedNV (GLuint index, GLbitfield mask);
-GLAPI void APIENTRY glTexRenderbufferNV (GLenum target, GLuint renderbuffer);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETMULTISAMPLEFVNVPROC) (GLenum pname, GLuint index, GLfloat *val);
-typedef void (APIENTRYP PFNGLSAMPLEMASKINDEXEDNVPROC) (GLuint index, GLbitfield mask);
-typedef void (APIENTRYP PFNGLTEXRENDERBUFFERNVPROC) (GLenum target, GLuint renderbuffer);
-#endif
-
-#ifndef GL_NV_transform_feedback2
-#define GL_NV_transform_feedback2 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBindTransformFeedbackNV (GLenum target, GLuint id);
-GLAPI void APIENTRY glDeleteTransformFeedbacksNV (GLsizei n, const GLuint *ids);
-GLAPI void APIENTRY glGenTransformFeedbacksNV (GLsizei n, GLuint *ids);
-GLAPI GLboolean APIENTRY glIsTransformFeedbackNV (GLuint id);
-GLAPI void APIENTRY glPauseTransformFeedbackNV (void);
-GLAPI void APIENTRY glResumeTransformFeedbackNV (void);
-GLAPI void APIENTRY glDrawTransformFeedbackNV (GLenum mode, GLuint id);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBINDTRANSFORMFEEDBACKNVPROC) (GLenum target, GLuint id);
-typedef void (APIENTRYP PFNGLDELETETRANSFORMFEEDBACKSNVPROC) (GLsizei n, const GLuint *ids);
-typedef void (APIENTRYP PFNGLGENTRANSFORMFEEDBACKSNVPROC) (GLsizei n, GLuint *ids);
-typedef GLboolean (APIENTRYP PFNGLISTRANSFORMFEEDBACKNVPROC) (GLuint id);
-typedef void (APIENTRYP PFNGLPAUSETRANSFORMFEEDBACKNVPROC) (void);
-typedef void (APIENTRYP PFNGLRESUMETRANSFORMFEEDBACKNVPROC) (void);
-typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKNVPROC) (GLenum mode, GLuint id);
-#endif
-
-#ifndef GL_ATI_meminfo
-#define GL_ATI_meminfo 1
-#endif
-
-#ifndef GL_AMD_performance_monitor
-#define GL_AMD_performance_monitor 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGetPerfMonitorGroupsAMD (GLint *numGroups, GLsizei groupsSize, GLuint *groups);
-GLAPI void APIENTRY glGetPerfMonitorCountersAMD (GLuint group, GLint *numCounters, GLint *maxActiveCounters, GLsizei counterSize, GLuint *counters);
-GLAPI void APIENTRY glGetPerfMonitorGroupStringAMD (GLuint group, GLsizei bufSize, GLsizei *length, GLchar *groupString);
-GLAPI void APIENTRY glGetPerfMonitorCounterStringAMD (GLuint group, GLuint counter, GLsizei bufSize, GLsizei *length, GLchar *counterString);
-GLAPI void APIENTRY glGetPerfMonitorCounterInfoAMD (GLuint group, GLuint counter, GLenum pname, GLvoid *data);
-GLAPI void APIENTRY glGenPerfMonitorsAMD (GLsizei n, GLuint *monitors);
-GLAPI void APIENTRY glDeletePerfMonitorsAMD (GLsizei n, GLuint *monitors);
-GLAPI void APIENTRY glSelectPerfMonitorCountersAMD (GLuint monitor, GLboolean enable, GLuint group, GLint numCounters, GLuint *counterList);
-GLAPI void APIENTRY glBeginPerfMonitorAMD (GLuint monitor);
-GLAPI void APIENTRY glEndPerfMonitorAMD (GLuint monitor);
-GLAPI void APIENTRY glGetPerfMonitorCounterDataAMD (GLuint monitor, GLenum pname, GLsizei dataSize, GLuint *data, GLint *bytesWritten);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGETPERFMONITORGROUPSAMDPROC) (GLint *numGroups, GLsizei groupsSize, GLuint *groups);
-typedef void (APIENTRYP PFNGLGETPERFMONITORCOUNTERSAMDPROC) (GLuint group, GLint *numCounters, GLint *maxActiveCounters, GLsizei counterSize, GLuint *counters);
-typedef void (APIENTRYP PFNGLGETPERFMONITORGROUPSTRINGAMDPROC) (GLuint group, GLsizei bufSize, GLsizei *length, GLchar *groupString);
-typedef void (APIENTRYP PFNGLGETPERFMONITORCOUNTERSTRINGAMDPROC) (GLuint group, GLuint counter, GLsizei bufSize, GLsizei *length, GLchar *counterString);
-typedef void (APIENTRYP PFNGLGETPERFMONITORCOUNTERINFOAMDPROC) (GLuint group, GLuint counter, GLenum pname, GLvoid *data);
-typedef void (APIENTRYP PFNGLGENPERFMONITORSAMDPROC) (GLsizei n, GLuint *monitors);
-typedef void (APIENTRYP PFNGLDELETEPERFMONITORSAMDPROC) (GLsizei n, GLuint *monitors);
-typedef void (APIENTRYP PFNGLSELECTPERFMONITORCOUNTERSAMDPROC) (GLuint monitor, GLboolean enable, GLuint group, GLint numCounters, GLuint *counterList);
-typedef void (APIENTRYP PFNGLBEGINPERFMONITORAMDPROC) (GLuint monitor);
-typedef void (APIENTRYP PFNGLENDPERFMONITORAMDPROC) (GLuint monitor);
-typedef void (APIENTRYP PFNGLGETPERFMONITORCOUNTERDATAAMDPROC) (GLuint monitor, GLenum pname, GLsizei dataSize, GLuint *data, GLint *bytesWritten);
-#endif
-
-#ifndef GL_AMD_texture_texture4
-#define GL_AMD_texture_texture4 1
-#endif
-
-#ifndef GL_AMD_vertex_shader_tesselator
-#define GL_AMD_vertex_shader_tesselator 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTessellationFactorAMD (GLfloat factor);
-GLAPI void APIENTRY glTessellationModeAMD (GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTESSELLATIONFACTORAMDPROC) (GLfloat factor);
-typedef void (APIENTRYP PFNGLTESSELLATIONMODEAMDPROC) (GLenum mode);
-#endif
-
-#ifndef GL_EXT_provoking_vertex
-#define GL_EXT_provoking_vertex 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProvokingVertexEXT (GLenum mode);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROVOKINGVERTEXEXTPROC) (GLenum mode);
-#endif
-
-#ifndef GL_EXT_texture_snorm
-#define GL_EXT_texture_snorm 1
-#endif
-
-#ifndef GL_AMD_draw_buffers_blend
-#define GL_AMD_draw_buffers_blend 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBlendFuncIndexedAMD (GLuint buf, GLenum src, GLenum dst);
-GLAPI void APIENTRY glBlendFuncSeparateIndexedAMD (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
-GLAPI void APIENTRY glBlendEquationIndexedAMD (GLuint buf, GLenum mode);
-GLAPI void APIENTRY glBlendEquationSeparateIndexedAMD (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBLENDFUNCINDEXEDAMDPROC) (GLuint buf, GLenum src, GLenum dst);
-typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEINDEXEDAMDPROC) (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
-typedef void (APIENTRYP PFNGLBLENDEQUATIONINDEXEDAMDPROC) (GLuint buf, GLenum mode);
-typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEINDEXEDAMDPROC) (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
-#endif
-
-#ifndef GL_APPLE_texture_range
-#define GL_APPLE_texture_range 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTextureRangeAPPLE (GLenum target, GLsizei length, const GLvoid *pointer);
-GLAPI void APIENTRY glGetTexParameterPointervAPPLE (GLenum target, GLenum pname, GLvoid* *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXTURERANGEAPPLEPROC) (GLenum target, GLsizei length, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLGETTEXPARAMETERPOINTERVAPPLEPROC) (GLenum target, GLenum pname, GLvoid* *params);
-#endif
-
-#ifndef GL_APPLE_float_pixels
-#define GL_APPLE_float_pixels 1
-#endif
-
-#ifndef GL_APPLE_vertex_program_evaluators
-#define GL_APPLE_vertex_program_evaluators 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glEnableVertexAttribAPPLE (GLuint index, GLenum pname);
-GLAPI void APIENTRY glDisableVertexAttribAPPLE (GLuint index, GLenum pname);
-GLAPI GLboolean APIENTRY glIsVertexAttribEnabledAPPLE (GLuint index, GLenum pname);
-GLAPI void APIENTRY glMapVertexAttrib1dAPPLE (GLuint index, GLuint size, GLdouble u1, GLdouble u2, GLint stride, GLint order, const GLdouble *points);
-GLAPI void APIENTRY glMapVertexAttrib1fAPPLE (GLuint index, GLuint size, GLfloat u1, GLfloat u2, GLint stride, GLint order, const GLfloat *points);
-GLAPI void APIENTRY glMapVertexAttrib2dAPPLE (GLuint index, GLuint size, GLdouble u1, GLdouble u2, GLint ustride, GLint uorder, GLdouble v1, GLdouble v2, GLint vstride, GLint vorder, const GLdouble *points);
-GLAPI void APIENTRY glMapVertexAttrib2fAPPLE (GLuint index, GLuint size, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder, GLfloat v1, GLfloat v2, GLint vstride, GLint vorder, const GLfloat *points);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBAPPLEPROC) (GLuint index, GLenum pname);
-typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBAPPLEPROC) (GLuint index, GLenum pname);
-typedef GLboolean (APIENTRYP PFNGLISVERTEXATTRIBENABLEDAPPLEPROC) (GLuint index, GLenum pname);
-typedef void (APIENTRYP PFNGLMAPVERTEXATTRIB1DAPPLEPROC) (GLuint index, GLuint size, GLdouble u1, GLdouble u2, GLint stride, GLint order, const GLdouble *points);
-typedef void (APIENTRYP PFNGLMAPVERTEXATTRIB1FAPPLEPROC) (GLuint index, GLuint size, GLfloat u1, GLfloat u2, GLint stride, GLint order, const GLfloat *points);
-typedef void (APIENTRYP PFNGLMAPVERTEXATTRIB2DAPPLEPROC) (GLuint index, GLuint size, GLdouble u1, GLdouble u2, GLint ustride, GLint uorder, GLdouble v1, GLdouble v2, GLint vstride, GLint vorder, const GLdouble *points);
-typedef void (APIENTRYP PFNGLMAPVERTEXATTRIB2FAPPLEPROC) (GLuint index, GLuint size, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder, GLfloat v1, GLfloat v2, GLint vstride, GLint vorder, const GLfloat *points);
-#endif
-
-#ifndef GL_APPLE_aux_depth_stencil
-#define GL_APPLE_aux_depth_stencil 1
-#endif
-
-#ifndef GL_APPLE_object_purgeable
-#define GL_APPLE_object_purgeable 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI GLenum APIENTRY glObjectPurgeableAPPLE (GLenum objectType, GLuint name, GLenum option);
-GLAPI GLenum APIENTRY glObjectUnpurgeableAPPLE (GLenum objectType, GLuint name, GLenum option);
-GLAPI void APIENTRY glGetObjectParameterivAPPLE (GLenum objectType, GLuint name, GLenum pname, GLint *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef GLenum (APIENTRYP PFNGLOBJECTPURGEABLEAPPLEPROC) (GLenum objectType, GLuint name, GLenum option);
-typedef GLenum (APIENTRYP PFNGLOBJECTUNPURGEABLEAPPLEPROC) (GLenum objectType, GLuint name, GLenum option);
-typedef void (APIENTRYP PFNGLGETOBJECTPARAMETERIVAPPLEPROC) (GLenum objectType, GLuint name, GLenum pname, GLint *params);
-#endif
-
-#ifndef GL_APPLE_row_bytes
-#define GL_APPLE_row_bytes 1
-#endif
-
-#ifndef GL_APPLE_rgb_422
-#define GL_APPLE_rgb_422 1
-#endif
-
-#ifndef GL_NV_video_capture
-#define GL_NV_video_capture 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBeginVideoCaptureNV (GLuint video_capture_slot);
-GLAPI void APIENTRY glBindVideoCaptureStreamBufferNV (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLintptrARB offset);
-GLAPI void APIENTRY glBindVideoCaptureStreamTextureNV (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLenum target, GLuint texture);
-GLAPI void APIENTRY glEndVideoCaptureNV (GLuint video_capture_slot);
-GLAPI void APIENTRY glGetVideoCaptureivNV (GLuint video_capture_slot, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVideoCaptureStreamivNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLint *params);
-GLAPI void APIENTRY glGetVideoCaptureStreamfvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLfloat *params);
-GLAPI void APIENTRY glGetVideoCaptureStreamdvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLdouble *params);
-GLAPI GLenum APIENTRY glVideoCaptureNV (GLuint video_capture_slot, GLuint *sequence_num, GLuint64EXT *capture_time);
-GLAPI void APIENTRY glVideoCaptureStreamParameterivNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLint *params);
-GLAPI void APIENTRY glVideoCaptureStreamParameterfvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLfloat *params);
-GLAPI void APIENTRY glVideoCaptureStreamParameterdvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLdouble *params);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBEGINVIDEOCAPTURENVPROC) (GLuint video_capture_slot);
-typedef void (APIENTRYP PFNGLBINDVIDEOCAPTURESTREAMBUFFERNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLintptrARB offset);
-typedef void (APIENTRYP PFNGLBINDVIDEOCAPTURESTREAMTEXTURENVPROC) (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLenum target, GLuint texture);
-typedef void (APIENTRYP PFNGLENDVIDEOCAPTURENVPROC) (GLuint video_capture_slot);
-typedef void (APIENTRYP PFNGLGETVIDEOCAPTUREIVNVPROC) (GLuint video_capture_slot, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVIDEOCAPTURESTREAMIVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, GLint *params);
-typedef void (APIENTRYP PFNGLGETVIDEOCAPTURESTREAMFVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, GLfloat *params);
-typedef void (APIENTRYP PFNGLGETVIDEOCAPTURESTREAMDVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, GLdouble *params);
-typedef GLenum (APIENTRYP PFNGLVIDEOCAPTURENVPROC) (GLuint video_capture_slot, GLuint *sequence_num, GLuint64EXT *capture_time);
-typedef void (APIENTRYP PFNGLVIDEOCAPTURESTREAMPARAMETERIVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLint *params);
-typedef void (APIENTRYP PFNGLVIDEOCAPTURESTREAMPARAMETERFVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLfloat *params);
-typedef void (APIENTRYP PFNGLVIDEOCAPTURESTREAMPARAMETERDVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLdouble *params);
-#endif
-
-#ifndef GL_NV_copy_image
-#define GL_NV_copy_image 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glCopyImageSubDataNV (GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLCOPYIMAGESUBDATANVPROC) (GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
-#endif
-
-#ifndef GL_EXT_separate_shader_objects
-#define GL_EXT_separate_shader_objects 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glUseShaderProgramEXT (GLenum type, GLuint program);
-GLAPI void APIENTRY glActiveProgramEXT (GLuint program);
-GLAPI GLuint APIENTRY glCreateShaderProgramEXT (GLenum type, const GLchar *string);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLUSESHADERPROGRAMEXTPROC) (GLenum type, GLuint program);
-typedef void (APIENTRYP PFNGLACTIVEPROGRAMEXTPROC) (GLuint program);
-typedef GLuint (APIENTRYP PFNGLCREATESHADERPROGRAMEXTPROC) (GLenum type, const GLchar *string);
-#endif
-
-#ifndef GL_NV_parameter_buffer_object2
-#define GL_NV_parameter_buffer_object2 1
-#endif
-
-#ifndef GL_NV_shader_buffer_load
-#define GL_NV_shader_buffer_load 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glMakeBufferResidentNV (GLenum target, GLenum access);
-GLAPI void APIENTRY glMakeBufferNonResidentNV (GLenum target);
-GLAPI GLboolean APIENTRY glIsBufferResidentNV (GLenum target);
-GLAPI void APIENTRY glMakeNamedBufferResidentNV (GLuint buffer, GLenum access);
-GLAPI void APIENTRY glMakeNamedBufferNonResidentNV (GLuint buffer);
-GLAPI GLboolean APIENTRY glIsNamedBufferResidentNV (GLuint buffer);
-GLAPI void APIENTRY glGetBufferParameterui64vNV (GLenum target, GLenum pname, GLuint64EXT *params);
-GLAPI void APIENTRY glGetNamedBufferParameterui64vNV (GLuint buffer, GLenum pname, GLuint64EXT *params);
-GLAPI void APIENTRY glGetIntegerui64vNV (GLenum value, GLuint64EXT *result);
-GLAPI void APIENTRY glUniformui64NV (GLint location, GLuint64EXT value);
-GLAPI void APIENTRY glUniformui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
-GLAPI void APIENTRY glGetUniformui64vNV (GLuint program, GLint location, GLuint64EXT *params);
-GLAPI void APIENTRY glProgramUniformui64NV (GLuint program, GLint location, GLuint64EXT value);
-GLAPI void APIENTRY glProgramUniformui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLMAKEBUFFERRESIDENTNVPROC) (GLenum target, GLenum access);
-typedef void (APIENTRYP PFNGLMAKEBUFFERNONRESIDENTNVPROC) (GLenum target);
-typedef GLboolean (APIENTRYP PFNGLISBUFFERRESIDENTNVPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLMAKENAMEDBUFFERRESIDENTNVPROC) (GLuint buffer, GLenum access);
-typedef void (APIENTRYP PFNGLMAKENAMEDBUFFERNONRESIDENTNVPROC) (GLuint buffer);
-typedef GLboolean (APIENTRYP PFNGLISNAMEDBUFFERRESIDENTNVPROC) (GLuint buffer);
-typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERUI64VNVPROC) (GLenum target, GLenum pname, GLuint64EXT *params);
-typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPARAMETERUI64VNVPROC) (GLuint buffer, GLenum pname, GLuint64EXT *params);
-typedef void (APIENTRYP PFNGLGETINTEGERUI64VNVPROC) (GLenum value, GLuint64EXT *result);
-typedef void (APIENTRYP PFNGLUNIFORMUI64NVPROC) (GLint location, GLuint64EXT value);
-typedef void (APIENTRYP PFNGLUNIFORMUI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
-typedef void (APIENTRYP PFNGLGETUNIFORMUI64VNVPROC) (GLuint program, GLint location, GLuint64EXT *params);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMUI64NVPROC) (GLuint program, GLint location, GLuint64EXT value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORMUI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-#endif
-
-#ifndef GL_NV_vertex_buffer_unified_memory
-#define GL_NV_vertex_buffer_unified_memory 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBufferAddressRangeNV (GLenum pname, GLuint index, GLuint64EXT address, GLsizeiptr length);
-GLAPI void APIENTRY glVertexFormatNV (GLint size, GLenum type, GLsizei stride);
-GLAPI void APIENTRY glNormalFormatNV (GLenum type, GLsizei stride);
-GLAPI void APIENTRY glColorFormatNV (GLint size, GLenum type, GLsizei stride);
-GLAPI void APIENTRY glIndexFormatNV (GLenum type, GLsizei stride);
-GLAPI void APIENTRY glTexCoordFormatNV (GLint size, GLenum type, GLsizei stride);
-GLAPI void APIENTRY glEdgeFlagFormatNV (GLsizei stride);
-GLAPI void APIENTRY glSecondaryColorFormatNV (GLint size, GLenum type, GLsizei stride);
-GLAPI void APIENTRY glFogCoordFormatNV (GLenum type, GLsizei stride);
-GLAPI void APIENTRY glVertexAttribFormatNV (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride);
-GLAPI void APIENTRY glVertexAttribIFormatNV (GLuint index, GLint size, GLenum type, GLsizei stride);
-GLAPI void APIENTRY glGetIntegerui64i_vNV (GLenum value, GLuint index, GLuint64EXT *result);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBUFFERADDRESSRANGENVPROC) (GLenum pname, GLuint index, GLuint64EXT address, GLsizeiptr length);
-typedef void (APIENTRYP PFNGLVERTEXFORMATNVPROC) (GLint size, GLenum type, GLsizei stride);
-typedef void (APIENTRYP PFNGLNORMALFORMATNVPROC) (GLenum type, GLsizei stride);
-typedef void (APIENTRYP PFNGLCOLORFORMATNVPROC) (GLint size, GLenum type, GLsizei stride);
-typedef void (APIENTRYP PFNGLINDEXFORMATNVPROC) (GLenum type, GLsizei stride);
-typedef void (APIENTRYP PFNGLTEXCOORDFORMATNVPROC) (GLint size, GLenum type, GLsizei stride);
-typedef void (APIENTRYP PFNGLEDGEFLAGFORMATNVPROC) (GLsizei stride);
-typedef void (APIENTRYP PFNGLSECONDARYCOLORFORMATNVPROC) (GLint size, GLenum type, GLsizei stride);
-typedef void (APIENTRYP PFNGLFOGCOORDFORMATNVPROC) (GLenum type, GLsizei stride);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBFORMATNVPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBIFORMATNVPROC) (GLuint index, GLint size, GLenum type, GLsizei stride);
-typedef void (APIENTRYP PFNGLGETINTEGERUI64I_VNVPROC) (GLenum value, GLuint index, GLuint64EXT *result);
-#endif
-
-#ifndef GL_NV_texture_barrier
-#define GL_NV_texture_barrier 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glTextureBarrierNV (void);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLTEXTUREBARRIERNVPROC) (void);
-#endif
-
-#ifndef GL_AMD_shader_stencil_export
-#define GL_AMD_shader_stencil_export 1
-#endif
-
-#ifndef GL_AMD_seamless_cubemap_per_texture
-#define GL_AMD_seamless_cubemap_per_texture 1
-#endif
-
-#ifndef GL_AMD_conservative_depth
-#define GL_AMD_conservative_depth 1
-#endif
-
-#ifndef GL_EXT_shader_image_load_store
-#define GL_EXT_shader_image_load_store 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glBindImageTextureEXT (GLuint index, GLuint texture, GLint level, GLboolean layered, GLint layer, GLenum access, GLint format);
-GLAPI void APIENTRY glMemoryBarrierEXT (GLbitfield barriers);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLBINDIMAGETEXTUREEXTPROC) (GLuint index, GLuint texture, GLint level, GLboolean layered, GLint layer, GLenum access, GLint format);
-typedef void (APIENTRYP PFNGLMEMORYBARRIEREXTPROC) (GLbitfield barriers);
-#endif
-
-#ifndef GL_EXT_vertex_attrib_64bit
-#define GL_EXT_vertex_attrib_64bit 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexAttribL1dEXT (GLuint index, GLdouble x);
-GLAPI void APIENTRY glVertexAttribL2dEXT (GLuint index, GLdouble x, GLdouble y);
-GLAPI void APIENTRY glVertexAttribL3dEXT (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-GLAPI void APIENTRY glVertexAttribL4dEXT (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-GLAPI void APIENTRY glVertexAttribL1dvEXT (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribL2dvEXT (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribL3dvEXT (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribL4dvEXT (GLuint index, const GLdouble *v);
-GLAPI void APIENTRY glVertexAttribLPointerEXT (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-GLAPI void APIENTRY glGetVertexAttribLdvEXT (GLuint index, GLenum pname, GLdouble *params);
-GLAPI void APIENTRY glVertexArrayVertexAttribLOffsetEXT (GLuint vaobj, GLuint buffer, GLuint index, GLint size, GLenum type, GLsizei stride, GLintptr offset);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DEXTPROC) (GLuint index, GLdouble x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DEXTPROC) (GLuint index, GLdouble x, GLdouble y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DEXTPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DEXTPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DVEXTPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DVEXTPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DVEXTPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DVEXTPROC) (GLuint index, const GLdouble *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBLPOINTEREXTPROC) (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLDVEXTPROC) (GLuint index, GLenum pname, GLdouble *params);
-typedef void (APIENTRYP PFNGLVERTEXARRAYVERTEXATTRIBLOFFSETEXTPROC) (GLuint vaobj, GLuint buffer, GLuint index, GLint size, GLenum type, GLsizei stride, GLintptr offset);
-#endif
-
-#ifndef GL_NV_gpu_program5
-#define GL_NV_gpu_program5 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glProgramSubroutineParametersuivNV (GLenum target, GLsizei count, const GLuint *params);
-GLAPI void APIENTRY glGetProgramSubroutineParameteruivNV (GLenum target, GLuint index, GLuint *param);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLPROGRAMSUBROUTINEPARAMETERSUIVNVPROC) (GLenum target, GLsizei count, const GLuint *params);
-typedef void (APIENTRYP PFNGLGETPROGRAMSUBROUTINEPARAMETERUIVNVPROC) (GLenum target, GLuint index, GLuint *param);
-#endif
-
-#ifndef GL_NV_gpu_shader5
-#define GL_NV_gpu_shader5 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glUniform1i64NV (GLint location, GLint64EXT x);
-GLAPI void APIENTRY glUniform2i64NV (GLint location, GLint64EXT x, GLint64EXT y);
-GLAPI void APIENTRY glUniform3i64NV (GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z);
-GLAPI void APIENTRY glUniform4i64NV (GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
-GLAPI void APIENTRY glUniform1i64vNV (GLint location, GLsizei count, const GLint64EXT *value);
-GLAPI void APIENTRY glUniform2i64vNV (GLint location, GLsizei count, const GLint64EXT *value);
-GLAPI void APIENTRY glUniform3i64vNV (GLint location, GLsizei count, const GLint64EXT *value);
-GLAPI void APIENTRY glUniform4i64vNV (GLint location, GLsizei count, const GLint64EXT *value);
-GLAPI void APIENTRY glUniform1ui64NV (GLint location, GLuint64EXT x);
-GLAPI void APIENTRY glUniform2ui64NV (GLint location, GLuint64EXT x, GLuint64EXT y);
-GLAPI void APIENTRY glUniform3ui64NV (GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
-GLAPI void APIENTRY glUniform4ui64NV (GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
-GLAPI void APIENTRY glUniform1ui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
-GLAPI void APIENTRY glUniform2ui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
-GLAPI void APIENTRY glUniform3ui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
-GLAPI void APIENTRY glUniform4ui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
-GLAPI void APIENTRY glGetUniformi64vNV (GLuint program, GLint location, GLint64EXT *params);
-GLAPI void APIENTRY glProgramUniform1i64NV (GLuint program, GLint location, GLint64EXT x);
-GLAPI void APIENTRY glProgramUniform2i64NV (GLuint program, GLint location, GLint64EXT x, GLint64EXT y);
-GLAPI void APIENTRY glProgramUniform3i64NV (GLuint program, GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z);
-GLAPI void APIENTRY glProgramUniform4i64NV (GLuint program, GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
-GLAPI void APIENTRY glProgramUniform1i64vNV (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
-GLAPI void APIENTRY glProgramUniform2i64vNV (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
-GLAPI void APIENTRY glProgramUniform3i64vNV (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
-GLAPI void APIENTRY glProgramUniform4i64vNV (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
-GLAPI void APIENTRY glProgramUniform1ui64NV (GLuint program, GLint location, GLuint64EXT x);
-GLAPI void APIENTRY glProgramUniform2ui64NV (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y);
-GLAPI void APIENTRY glProgramUniform3ui64NV (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
-GLAPI void APIENTRY glProgramUniform4ui64NV (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
-GLAPI void APIENTRY glProgramUniform1ui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-GLAPI void APIENTRY glProgramUniform2ui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-GLAPI void APIENTRY glProgramUniform3ui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-GLAPI void APIENTRY glProgramUniform4ui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLUNIFORM1I64NVPROC) (GLint location, GLint64EXT x);
-typedef void (APIENTRYP PFNGLUNIFORM2I64NVPROC) (GLint location, GLint64EXT x, GLint64EXT y);
-typedef void (APIENTRYP PFNGLUNIFORM3I64NVPROC) (GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z);
-typedef void (APIENTRYP PFNGLUNIFORM4I64NVPROC) (GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
-typedef void (APIENTRYP PFNGLUNIFORM1I64VNVPROC) (GLint location, GLsizei count, const GLint64EXT *value);
-typedef void (APIENTRYP PFNGLUNIFORM2I64VNVPROC) (GLint location, GLsizei count, const GLint64EXT *value);
-typedef void (APIENTRYP PFNGLUNIFORM3I64VNVPROC) (GLint location, GLsizei count, const GLint64EXT *value);
-typedef void (APIENTRYP PFNGLUNIFORM4I64VNVPROC) (GLint location, GLsizei count, const GLint64EXT *value);
-typedef void (APIENTRYP PFNGLUNIFORM1UI64NVPROC) (GLint location, GLuint64EXT x);
-typedef void (APIENTRYP PFNGLUNIFORM2UI64NVPROC) (GLint location, GLuint64EXT x, GLuint64EXT y);
-typedef void (APIENTRYP PFNGLUNIFORM3UI64NVPROC) (GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
-typedef void (APIENTRYP PFNGLUNIFORM4UI64NVPROC) (GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
-typedef void (APIENTRYP PFNGLUNIFORM1UI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
-typedef void (APIENTRYP PFNGLUNIFORM2UI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
-typedef void (APIENTRYP PFNGLUNIFORM3UI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
-typedef void (APIENTRYP PFNGLUNIFORM4UI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
-typedef void (APIENTRYP PFNGLGETUNIFORMI64VNVPROC) (GLuint program, GLint location, GLint64EXT *params);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1I64NVPROC) (GLuint program, GLint location, GLint64EXT x);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2I64NVPROC) (GLuint program, GLint location, GLint64EXT x, GLint64EXT y);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3I64NVPROC) (GLuint program, GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4I64NVPROC) (GLuint program, GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1I64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2I64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3I64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4I64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UI64NVPROC) (GLuint program, GLint location, GLuint64EXT x);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UI64NVPROC) (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UI64NVPROC) (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UI64NVPROC) (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
-#endif
-
-#ifndef GL_NV_shader_buffer_store
-#define GL_NV_shader_buffer_store 1
-#endif
-
-#ifndef GL_NV_tessellation_program5
-#define GL_NV_tessellation_program5 1
-#endif
-
-#ifndef GL_NV_vertex_attrib_integer_64bit
-#define GL_NV_vertex_attrib_integer_64bit 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVertexAttribL1i64NV (GLuint index, GLint64EXT x);
-GLAPI void APIENTRY glVertexAttribL2i64NV (GLuint index, GLint64EXT x, GLint64EXT y);
-GLAPI void APIENTRY glVertexAttribL3i64NV (GLuint index, GLint64EXT x, GLint64EXT y, GLint64EXT z);
-GLAPI void APIENTRY glVertexAttribL4i64NV (GLuint index, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
-GLAPI void APIENTRY glVertexAttribL1i64vNV (GLuint index, const GLint64EXT *v);
-GLAPI void APIENTRY glVertexAttribL2i64vNV (GLuint index, const GLint64EXT *v);
-GLAPI void APIENTRY glVertexAttribL3i64vNV (GLuint index, const GLint64EXT *v);
-GLAPI void APIENTRY glVertexAttribL4i64vNV (GLuint index, const GLint64EXT *v);
-GLAPI void APIENTRY glVertexAttribL1ui64NV (GLuint index, GLuint64EXT x);
-GLAPI void APIENTRY glVertexAttribL2ui64NV (GLuint index, GLuint64EXT x, GLuint64EXT y);
-GLAPI void APIENTRY glVertexAttribL3ui64NV (GLuint index, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
-GLAPI void APIENTRY glVertexAttribL4ui64NV (GLuint index, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
-GLAPI void APIENTRY glVertexAttribL1ui64vNV (GLuint index, const GLuint64EXT *v);
-GLAPI void APIENTRY glVertexAttribL2ui64vNV (GLuint index, const GLuint64EXT *v);
-GLAPI void APIENTRY glVertexAttribL3ui64vNV (GLuint index, const GLuint64EXT *v);
-GLAPI void APIENTRY glVertexAttribL4ui64vNV (GLuint index, const GLuint64EXT *v);
-GLAPI void APIENTRY glGetVertexAttribLi64vNV (GLuint index, GLenum pname, GLint64EXT *params);
-GLAPI void APIENTRY glGetVertexAttribLui64vNV (GLuint index, GLenum pname, GLuint64EXT *params);
-GLAPI void APIENTRY glVertexAttribLFormatNV (GLuint index, GLint size, GLenum type, GLsizei stride);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL1I64NVPROC) (GLuint index, GLint64EXT x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL2I64NVPROC) (GLuint index, GLint64EXT x, GLint64EXT y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL3I64NVPROC) (GLuint index, GLint64EXT x, GLint64EXT y, GLint64EXT z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL4I64NVPROC) (GLuint index, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL1I64VNVPROC) (GLuint index, const GLint64EXT *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL2I64VNVPROC) (GLuint index, const GLint64EXT *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL3I64VNVPROC) (GLuint index, const GLint64EXT *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL4I64VNVPROC) (GLuint index, const GLint64EXT *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL1UI64NVPROC) (GLuint index, GLuint64EXT x);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL2UI64NVPROC) (GLuint index, GLuint64EXT x, GLuint64EXT y);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL3UI64NVPROC) (GLuint index, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL4UI64NVPROC) (GLuint index, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL1UI64VNVPROC) (GLuint index, const GLuint64EXT *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL2UI64VNVPROC) (GLuint index, const GLuint64EXT *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL3UI64VNVPROC) (GLuint index, const GLuint64EXT *v);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBL4UI64VNVPROC) (GLuint index, const GLuint64EXT *v);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLI64VNVPROC) (GLuint index, GLenum pname, GLint64EXT *params);
-typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLUI64VNVPROC) (GLuint index, GLenum pname, GLuint64EXT *params);
-typedef void (APIENTRYP PFNGLVERTEXATTRIBLFORMATNVPROC) (GLuint index, GLint size, GLenum type, GLsizei stride);
-#endif
-
-#ifndef GL_NV_multisample_coverage
-#define GL_NV_multisample_coverage 1
-#endif
-
-#ifndef GL_AMD_name_gen_delete
-#define GL_AMD_name_gen_delete 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGenNamesAMD (GLenum identifier, GLuint num, GLuint *names);
-GLAPI void APIENTRY glDeleteNamesAMD (GLenum identifier, GLuint num, const GLuint *names);
-GLAPI GLboolean APIENTRY glIsNameAMD (GLenum identifier, GLuint name);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLGENNAMESAMDPROC) (GLenum identifier, GLuint num, GLuint *names);
-typedef void (APIENTRYP PFNGLDELETENAMESAMDPROC) (GLenum identifier, GLuint num, const GLuint *names);
-typedef GLboolean (APIENTRYP PFNGLISNAMEAMDPROC) (GLenum identifier, GLuint name);
-#endif
-
-#ifndef GL_AMD_debug_output
-#define GL_AMD_debug_output 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glDebugMessageEnableAMD (GLenum category, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
-GLAPI void APIENTRY glDebugMessageInsertAMD (GLenum category, GLenum severity, GLuint id, GLsizei length, const GLchar *buf);
-GLAPI void APIENTRY glDebugMessageCallbackAMD (GLDEBUGPROCAMD callback, GLvoid *userParam);
-GLAPI GLuint APIENTRY glGetDebugMessageLogAMD (GLuint count, GLsizei bufsize, GLenum *categories, GLuint *severities, GLuint *ids, GLsizei *lengths, GLchar *message);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLDEBUGMESSAGEENABLEAMDPROC) (GLenum category, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
-typedef void (APIENTRYP PFNGLDEBUGMESSAGEINSERTAMDPROC) (GLenum category, GLenum severity, GLuint id, GLsizei length, const GLchar *buf);
-typedef void (APIENTRYP PFNGLDEBUGMESSAGECALLBACKAMDPROC) (GLDEBUGPROCAMD callback, GLvoid *userParam);
-typedef GLuint (APIENTRYP PFNGLGETDEBUGMESSAGELOGAMDPROC) (GLuint count, GLsizei bufsize, GLenum *categories, GLuint *severities, GLuint *ids, GLsizei *lengths, GLchar *message);
-#endif
-
-#ifndef GL_NV_vdpau_interop
-#define GL_NV_vdpau_interop 1
-#ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glVDPAUInitNV (const GLvoid *vdpDevice, const GLvoid *getProcAddress);
-GLAPI void APIENTRY glVDPAUFiniNV (void);
-GLAPI GLvdpauSurfaceNV APIENTRY glVDPAURegisterVideoSurfaceNV (GLvoid *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
-GLAPI GLvdpauSurfaceNV APIENTRY glVDPAURegisterOutputSurfaceNV (GLvoid *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
-GLAPI void APIENTRY glVDPAUIsSurfaceNV (GLvdpauSurfaceNV surface);
-GLAPI void APIENTRY glVDPAUUnregisterSurfaceNV (GLvdpauSurfaceNV surface);
-GLAPI void APIENTRY glVDPAUGetSurfaceivNV (GLvdpauSurfaceNV surface, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
-GLAPI void APIENTRY glVDPAUSurfaceAccessNV (GLvdpauSurfaceNV surface, GLenum access);
-GLAPI void APIENTRY glVDPAUMapSurfacesNV (GLsizei numSurfaces, const GLvdpauSurfaceNV *surfaces);
-GLAPI void APIENTRY glVDPAUUnmapSurfacesNV (GLsizei numSurface, const GLvdpauSurfaceNV *surfaces);
-#endif /* GL_GLEXT_PROTOTYPES */
-typedef void (APIENTRYP PFNGLVDPAUINITNVPROC) (const GLvoid *vdpDevice, const GLvoid *getProcAddress);
-typedef void (APIENTRYP PFNGLVDPAUFININVPROC) (void);
-typedef GLvdpauSurfaceNV (APIENTRYP PFNGLVDPAUREGISTERVIDEOSURFACENVPROC) (GLvoid *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
-typedef GLvdpauSurfaceNV (APIENTRYP PFNGLVDPAUREGISTEROUTPUTSURFACENVPROC) (GLvoid *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
-typedef void (APIENTRYP PFNGLVDPAUISSURFACENVPROC) (GLvdpauSurfaceNV surface);
-typedef void (APIENTRYP PFNGLVDPAUUNREGISTERSURFACENVPROC) (GLvdpauSurfaceNV surface);
-typedef void (APIENTRYP PFNGLVDPAUGETSURFACEIVNVPROC) (GLvdpauSurfaceNV surface, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
-typedef void (APIENTRYP PFNGLVDPAUSURFACEACCESSNVPROC) (GLvdpauSurfaceNV surface, GLenum access);
-typedef void (APIENTRYP PFNGLVDPAUMAPSURFACESNVPROC) (GLsizei numSurfaces, const GLvdpauSurfaceNV *surfaces);
-typedef void (APIENTRYP PFNGLVDPAUUNMAPSURFACESNVPROC) (GLsizei numSurface, const GLvdpauSurfaceNV *surfaces);
-#endif
-
-#ifndef GL_AMD_transform_feedback3_lines_triangles
-#define GL_AMD_transform_feedback3_lines_triangles 1
-#endif
-
-#ifndef GL_AMD_depth_clamp_separate
-#define GL_AMD_depth_clamp_separate 1
-#endif
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
+++ /dev/null
-#ifndef __glxext_h_
-#define __glxext_h_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/*
-** Copyright (c) 2007-2010 The Khronos Group Inc.
-**
-** Permission is hereby granted, free of charge, to any person obtaining a
-** copy of this software and/or associated documentation files (the
-** "Materials"), to deal in the Materials without restriction, including
-** without limitation the rights to use, copy, modify, merge, publish,
-** distribute, sublicense, and/or sell copies of the Materials, and to
-** permit persons to whom the Materials are furnished to do so, subject to
-** the following conditions:
-**
-** The above copyright notice and this permission notice shall be included
-** in all copies or substantial portions of the Materials.
-**
-** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
-*/
-
-/* Function declaration macros - to move into glplatform.h */
-
-#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
-#define WIN32_LEAN_AND_MEAN 1
-#include <windows.h>
-#endif
-
-#ifndef APIENTRY
-#define APIENTRY
-#endif
-#ifndef APIENTRYP
-#define APIENTRYP APIENTRY *
-#endif
-#ifndef GLAPI
-#define GLAPI extern
-#endif
-
-/*************************************************************/
-
-/* Header file version number, required by OpenGL ABI for Linux */
-/* glxext.h last updated 2010/08/06 */
-/* Current version at http://www.opengl.org/registry/ */
-#define GLX_GLXEXT_VERSION 32
-
-#ifndef GLX_VERSION_1_3
-#define GLX_WINDOW_BIT 0x00000001
-#define GLX_PIXMAP_BIT 0x00000002
-#define GLX_PBUFFER_BIT 0x00000004
-#define GLX_RGBA_BIT 0x00000001
-#define GLX_COLOR_INDEX_BIT 0x00000002
-#define GLX_PBUFFER_CLOBBER_MASK 0x08000000
-#define GLX_FRONT_LEFT_BUFFER_BIT 0x00000001
-#define GLX_FRONT_RIGHT_BUFFER_BIT 0x00000002
-#define GLX_BACK_LEFT_BUFFER_BIT 0x00000004
-#define GLX_BACK_RIGHT_BUFFER_BIT 0x00000008
-#define GLX_AUX_BUFFERS_BIT 0x00000010
-#define GLX_DEPTH_BUFFER_BIT 0x00000020
-#define GLX_STENCIL_BUFFER_BIT 0x00000040
-#define GLX_ACCUM_BUFFER_BIT 0x00000080
-#define GLX_CONFIG_CAVEAT 0x20
-#define GLX_X_VISUAL_TYPE 0x22
-#define GLX_TRANSPARENT_TYPE 0x23
-#define GLX_TRANSPARENT_INDEX_VALUE 0x24
-#define GLX_TRANSPARENT_RED_VALUE 0x25
-#define GLX_TRANSPARENT_GREEN_VALUE 0x26
-#define GLX_TRANSPARENT_BLUE_VALUE 0x27
-#define GLX_TRANSPARENT_ALPHA_VALUE 0x28
-#define GLX_DONT_CARE 0xFFFFFFFF
-#define GLX_NONE 0x8000
-#define GLX_SLOW_CONFIG 0x8001
-#define GLX_TRUE_COLOR 0x8002
-#define GLX_DIRECT_COLOR 0x8003
-#define GLX_PSEUDO_COLOR 0x8004
-#define GLX_STATIC_COLOR 0x8005
-#define GLX_GRAY_SCALE 0x8006
-#define GLX_STATIC_GRAY 0x8007
-#define GLX_TRANSPARENT_RGB 0x8008
-#define GLX_TRANSPARENT_INDEX 0x8009
-#define GLX_VISUAL_ID 0x800B
-#define GLX_SCREEN 0x800C
-#define GLX_NON_CONFORMANT_CONFIG 0x800D
-#define GLX_DRAWABLE_TYPE 0x8010
-#define GLX_RENDER_TYPE 0x8011
-#define GLX_X_RENDERABLE 0x8012
-#define GLX_FBCONFIG_ID 0x8013
-#define GLX_RGBA_TYPE 0x8014
-#define GLX_COLOR_INDEX_TYPE 0x8015
-#define GLX_MAX_PBUFFER_WIDTH 0x8016
-#define GLX_MAX_PBUFFER_HEIGHT 0x8017
-#define GLX_MAX_PBUFFER_PIXELS 0x8018
-#define GLX_PRESERVED_CONTENTS 0x801B
-#define GLX_LARGEST_PBUFFER 0x801C
-#define GLX_WIDTH 0x801D
-#define GLX_HEIGHT 0x801E
-#define GLX_EVENT_MASK 0x801F
-#define GLX_DAMAGED 0x8020
-#define GLX_SAVED 0x8021
-#define GLX_WINDOW 0x8022
-#define GLX_PBUFFER 0x8023
-#define GLX_PBUFFER_HEIGHT 0x8040
-#define GLX_PBUFFER_WIDTH 0x8041
-#endif
-
-#ifndef GLX_VERSION_1_4
-#define GLX_SAMPLE_BUFFERS 100000
-#define GLX_SAMPLES 100001
-#endif
-
-#ifndef GLX_ARB_get_proc_address
-#endif
-
-#ifndef GLX_ARB_multisample
-#define GLX_SAMPLE_BUFFERS_ARB 100000
-#define GLX_SAMPLES_ARB 100001
-#endif
-
-#ifndef GLX_ARB_vertex_buffer_object
-#define GLX_CONTEXT_ALLOW_BUFFER_BYTE_ORDER_MISMATCH_ARB 0x2095
-#endif
-
-#ifndef GLX_ARB_fbconfig_float
-#define GLX_RGBA_FLOAT_TYPE_ARB 0x20B9
-#define GLX_RGBA_FLOAT_BIT_ARB 0x00000004
-#endif
-
-#ifndef GLX_ARB_framebuffer_sRGB
-#define GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20B2
-#endif
-
-#ifndef GLX_ARB_create_context
-#define GLX_CONTEXT_DEBUG_BIT_ARB 0x00000001
-#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
-#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
-#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
-#define GLX_CONTEXT_FLAGS_ARB 0x2094
-#endif
-
-#ifndef GLX_ARB_create_context_profile
-#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
-#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
-#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
-#endif
-
-#ifndef GLX_ARB_create_context_robustness
-#define GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB 0x00000004
-#define GLX_LOSE_CONTEXT_ON_RESET_ARB 0x8252
-#define GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
-#define GLX_NO_RESET_NOTIFICATION_ARB 0x8261
-#endif
-
-#ifndef GLX_SGIS_multisample
-#define GLX_SAMPLE_BUFFERS_SGIS 100000
-#define GLX_SAMPLES_SGIS 100001
-#endif
-
-#ifndef GLX_EXT_visual_info
-#define GLX_X_VISUAL_TYPE_EXT 0x22
-#define GLX_TRANSPARENT_TYPE_EXT 0x23
-#define GLX_TRANSPARENT_INDEX_VALUE_EXT 0x24
-#define GLX_TRANSPARENT_RED_VALUE_EXT 0x25
-#define GLX_TRANSPARENT_GREEN_VALUE_EXT 0x26
-#define GLX_TRANSPARENT_BLUE_VALUE_EXT 0x27
-#define GLX_TRANSPARENT_ALPHA_VALUE_EXT 0x28
-#define GLX_NONE_EXT 0x8000
-#define GLX_TRUE_COLOR_EXT 0x8002
-#define GLX_DIRECT_COLOR_EXT 0x8003
-#define GLX_PSEUDO_COLOR_EXT 0x8004
-#define GLX_STATIC_COLOR_EXT 0x8005
-#define GLX_GRAY_SCALE_EXT 0x8006
-#define GLX_STATIC_GRAY_EXT 0x8007
-#define GLX_TRANSPARENT_RGB_EXT 0x8008
-#define GLX_TRANSPARENT_INDEX_EXT 0x8009
-#endif
-
-#ifndef GLX_SGI_swap_control
-#endif
-
-#ifndef GLX_SGI_video_sync
-#endif
-
-#ifndef GLX_SGI_make_current_read
-#endif
-
-#ifndef GLX_SGIX_video_source
-#endif
-
-#ifndef GLX_EXT_visual_rating
-#define GLX_VISUAL_CAVEAT_EXT 0x20
-#define GLX_SLOW_VISUAL_EXT 0x8001
-#define GLX_NON_CONFORMANT_VISUAL_EXT 0x800D
-/* reuse GLX_NONE_EXT */
-#endif
-
-#ifndef GLX_EXT_import_context
-#define GLX_SHARE_CONTEXT_EXT 0x800A
-#define GLX_VISUAL_ID_EXT 0x800B
-#define GLX_SCREEN_EXT 0x800C
-#endif
-
-#ifndef GLX_SGIX_fbconfig
-#define GLX_WINDOW_BIT_SGIX 0x00000001
-#define GLX_PIXMAP_BIT_SGIX 0x00000002
-#define GLX_RGBA_BIT_SGIX 0x00000001
-#define GLX_COLOR_INDEX_BIT_SGIX 0x00000002
-#define GLX_DRAWABLE_TYPE_SGIX 0x8010
-#define GLX_RENDER_TYPE_SGIX 0x8011
-#define GLX_X_RENDERABLE_SGIX 0x8012
-#define GLX_FBCONFIG_ID_SGIX 0x8013
-#define GLX_RGBA_TYPE_SGIX 0x8014
-#define GLX_COLOR_INDEX_TYPE_SGIX 0x8015
-/* reuse GLX_SCREEN_EXT */
-#endif
-
-#ifndef GLX_SGIX_pbuffer
-#define GLX_PBUFFER_BIT_SGIX 0x00000004
-#define GLX_BUFFER_CLOBBER_MASK_SGIX 0x08000000
-#define GLX_FRONT_LEFT_BUFFER_BIT_SGIX 0x00000001
-#define GLX_FRONT_RIGHT_BUFFER_BIT_SGIX 0x00000002
-#define GLX_BACK_LEFT_BUFFER_BIT_SGIX 0x00000004
-#define GLX_BACK_RIGHT_BUFFER_BIT_SGIX 0x00000008
-#define GLX_AUX_BUFFERS_BIT_SGIX 0x00000010
-#define GLX_DEPTH_BUFFER_BIT_SGIX 0x00000020
-#define GLX_STENCIL_BUFFER_BIT_SGIX 0x00000040
-#define GLX_ACCUM_BUFFER_BIT_SGIX 0x00000080
-#define GLX_SAMPLE_BUFFERS_BIT_SGIX 0x00000100
-#define GLX_MAX_PBUFFER_WIDTH_SGIX 0x8016
-#define GLX_MAX_PBUFFER_HEIGHT_SGIX 0x8017
-#define GLX_MAX_PBUFFER_PIXELS_SGIX 0x8018
-#define GLX_OPTIMAL_PBUFFER_WIDTH_SGIX 0x8019
-#define GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX 0x801A
-#define GLX_PRESERVED_CONTENTS_SGIX 0x801B
-#define GLX_LARGEST_PBUFFER_SGIX 0x801C
-#define GLX_WIDTH_SGIX 0x801D
-#define GLX_HEIGHT_SGIX 0x801E
-#define GLX_EVENT_MASK_SGIX 0x801F
-#define GLX_DAMAGED_SGIX 0x8020
-#define GLX_SAVED_SGIX 0x8021
-#define GLX_WINDOW_SGIX 0x8022
-#define GLX_PBUFFER_SGIX 0x8023
-#endif
-
-#ifndef GLX_SGI_cushion
-#endif
-
-#ifndef GLX_SGIX_video_resize
-#define GLX_SYNC_FRAME_SGIX 0x00000000
-#define GLX_SYNC_SWAP_SGIX 0x00000001
-#endif
-
-#ifndef GLX_SGIX_dmbuffer
-#define GLX_DIGITAL_MEDIA_PBUFFER_SGIX 0x8024
-#endif
-
-#ifndef GLX_SGIX_swap_group
-#endif
-
-#ifndef GLX_SGIX_swap_barrier
-#endif
-
-#ifndef GLX_SGIS_blended_overlay
-#define GLX_BLENDED_RGBA_SGIS 0x8025
-#endif
-
-#ifndef GLX_SGIS_shared_multisample
-#define GLX_MULTISAMPLE_SUB_RECT_WIDTH_SGIS 0x8026
-#define GLX_MULTISAMPLE_SUB_RECT_HEIGHT_SGIS 0x8027
-#endif
-
-#ifndef GLX_SUN_get_transparent_index
-#endif
-
-#ifndef GLX_3DFX_multisample
-#define GLX_SAMPLE_BUFFERS_3DFX 0x8050
-#define GLX_SAMPLES_3DFX 0x8051
-#endif
-
-#ifndef GLX_MESA_copy_sub_buffer
-#endif
-
-#ifndef GLX_MESA_pixmap_colormap
-#endif
-
-#ifndef GLX_MESA_release_buffers
-#endif
-
-#ifndef GLX_MESA_set_3dfx_mode
-#define GLX_3DFX_WINDOW_MODE_MESA 0x1
-#define GLX_3DFX_FULLSCREEN_MODE_MESA 0x2
-#endif
-
-#ifndef GLX_SGIX_visual_select_group
-#define GLX_VISUAL_SELECT_GROUP_SGIX 0x8028
-#endif
-
-#ifndef GLX_OML_swap_method
-#define GLX_SWAP_METHOD_OML 0x8060
-#define GLX_SWAP_EXCHANGE_OML 0x8061
-#define GLX_SWAP_COPY_OML 0x8062
-#define GLX_SWAP_UNDEFINED_OML 0x8063
-#endif
-
-#ifndef GLX_OML_sync_control
-#endif
-
-#ifndef GLX_NV_float_buffer
-#define GLX_FLOAT_COMPONENTS_NV 0x20B0
-#endif
-
-#ifndef GLX_SGIX_hyperpipe
-#define GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX 80
-#define GLX_BAD_HYPERPIPE_CONFIG_SGIX 91
-#define GLX_BAD_HYPERPIPE_SGIX 92
-#define GLX_HYPERPIPE_DISPLAY_PIPE_SGIX 0x00000001
-#define GLX_HYPERPIPE_RENDER_PIPE_SGIX 0x00000002
-#define GLX_PIPE_RECT_SGIX 0x00000001
-#define GLX_PIPE_RECT_LIMITS_SGIX 0x00000002
-#define GLX_HYPERPIPE_STEREO_SGIX 0x00000003
-#define GLX_HYPERPIPE_PIXEL_AVERAGE_SGIX 0x00000004
-#define GLX_HYPERPIPE_ID_SGIX 0x8030
-#endif
-
-#ifndef GLX_MESA_agp_offset
-#endif
-
-#ifndef GLX_EXT_fbconfig_packed_float
-#define GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT 0x20B1
-#define GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT 0x00000008
-#endif
-
-#ifndef GLX_EXT_framebuffer_sRGB
-#define GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x20B2
-#endif
-
-#ifndef GLX_EXT_texture_from_pixmap
-#define GLX_TEXTURE_1D_BIT_EXT 0x00000001
-#define GLX_TEXTURE_2D_BIT_EXT 0x00000002
-#define GLX_TEXTURE_RECTANGLE_BIT_EXT 0x00000004
-#define GLX_BIND_TO_TEXTURE_RGB_EXT 0x20D0
-#define GLX_BIND_TO_TEXTURE_RGBA_EXT 0x20D1
-#define GLX_BIND_TO_MIPMAP_TEXTURE_EXT 0x20D2
-#define GLX_BIND_TO_TEXTURE_TARGETS_EXT 0x20D3
-#define GLX_Y_INVERTED_EXT 0x20D4
-#define GLX_TEXTURE_FORMAT_EXT 0x20D5
-#define GLX_TEXTURE_TARGET_EXT 0x20D6
-#define GLX_MIPMAP_TEXTURE_EXT 0x20D7
-#define GLX_TEXTURE_FORMAT_NONE_EXT 0x20D8
-#define GLX_TEXTURE_FORMAT_RGB_EXT 0x20D9
-#define GLX_TEXTURE_FORMAT_RGBA_EXT 0x20DA
-#define GLX_TEXTURE_1D_EXT 0x20DB
-#define GLX_TEXTURE_2D_EXT 0x20DC
-#define GLX_TEXTURE_RECTANGLE_EXT 0x20DD
-#define GLX_FRONT_LEFT_EXT 0x20DE
-#define GLX_FRONT_RIGHT_EXT 0x20DF
-#define GLX_BACK_LEFT_EXT 0x20E0
-#define GLX_BACK_RIGHT_EXT 0x20E1
-#define GLX_FRONT_EXT GLX_FRONT_LEFT_EXT
-#define GLX_BACK_EXT GLX_BACK_LEFT_EXT
-#define GLX_AUX0_EXT 0x20E2
-#define GLX_AUX1_EXT 0x20E3
-#define GLX_AUX2_EXT 0x20E4
-#define GLX_AUX3_EXT 0x20E5
-#define GLX_AUX4_EXT 0x20E6
-#define GLX_AUX5_EXT 0x20E7
-#define GLX_AUX6_EXT 0x20E8
-#define GLX_AUX7_EXT 0x20E9
-#define GLX_AUX8_EXT 0x20EA
-#define GLX_AUX9_EXT 0x20EB
-#endif
-
-#ifndef GLX_NV_present_video
-#define GLX_NUM_VIDEO_SLOTS_NV 0x20F0
-#endif
-
-#ifndef GLX_NV_video_out
-#define GLX_VIDEO_OUT_COLOR_NV 0x20C3
-#define GLX_VIDEO_OUT_ALPHA_NV 0x20C4
-#define GLX_VIDEO_OUT_DEPTH_NV 0x20C5
-#define GLX_VIDEO_OUT_COLOR_AND_ALPHA_NV 0x20C6
-#define GLX_VIDEO_OUT_COLOR_AND_DEPTH_NV 0x20C7
-#define GLX_VIDEO_OUT_FRAME_NV 0x20C8
-#define GLX_VIDEO_OUT_FIELD_1_NV 0x20C9
-#define GLX_VIDEO_OUT_FIELD_2_NV 0x20CA
-#define GLX_VIDEO_OUT_STACKED_FIELDS_1_2_NV 0x20CB
-#define GLX_VIDEO_OUT_STACKED_FIELDS_2_1_NV 0x20CC
-#endif
-
-#ifndef GLX_NV_swap_group
-#endif
-
-#ifndef GLX_NV_video_capture
-#define GLX_DEVICE_ID_NV 0x20CD
-#define GLX_UNIQUE_ID_NV 0x20CE
-#define GLX_NUM_VIDEO_CAPTURE_SLOTS_NV 0x20CF
-#endif
-
-#ifndef GLX_EXT_swap_control
-#define GLX_SWAP_INTERVAL_EXT 0x20F1
-#define GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
-#endif
-
-#ifndef GLX_NV_copy_image
-#endif
-
-#ifndef GLX_INTEL_swap_event
-#define GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK 0x04000000
-#define GLX_EXCHANGE_COMPLETE_INTEL 0x8180
-#define GLX_COPY_COMPLETE_INTEL 0x8181
-#define GLX_FLIP_COMPLETE_INTEL 0x8182
-#endif
-
-#ifndef GLX_NV_multisample_coverage
-#define GLX_COVERAGE_SAMPLES_NV 100001
-#define GLX_COLOR_SAMPLES_NV 0x20B3
-#endif
-
-#ifndef GLX_AMD_gpu_association
-#define GLX_GPU_VENDOR_AMD 0x1F00
-#define GLX_GPU_RENDERER_STRING_AMD 0x1F01
-#define GLX_GPU_OPENGL_VERSION_STRING_AMD 0x1F02
-#define GLX_GPU_FASTEST_TARGET_GPUS_AMD 0x21A2
-#define GLX_GPU_RAM_AMD 0x21A3
-#define GLX_GPU_CLOCK_AMD 0x21A4
-#define GLX_GPU_NUM_PIPES_AMD 0x21A5
-#define GLX_GPU_NUM_SIMD_AMD 0x21A6
-#define GLX_GPU_NUM_RB_AMD 0x21A7
-#define GLX_GPU_NUM_SPI_AMD 0x21A8
-#endif
-
-#ifndef GLX_EXT_create_context_es2_profile
-#define GLX_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
-#endif
-
-
-/*************************************************************/
-
-#ifndef GLX_ARB_get_proc_address
-typedef void (*__GLXextFuncPtr)(void);
-#endif
-
-#ifndef GLX_SGIX_video_source
-typedef XID GLXVideoSourceSGIX;
-#endif
-
-#ifndef GLX_SGIX_fbconfig
-typedef XID GLXFBConfigIDSGIX;
-typedef struct __GLXFBConfigRec *GLXFBConfigSGIX;
-#endif
-
-#ifndef GLX_SGIX_pbuffer
-typedef XID GLXPbufferSGIX;
-typedef struct {
- int type;
- unsigned long serial; /* # of last request processed by server */
- Bool send_event; /* true if this came for SendEvent request */
- Display *display; /* display the event was read from */
- GLXDrawable drawable; /* i.d. of Drawable */
- int event_type; /* GLX_DAMAGED_SGIX or GLX_SAVED_SGIX */
- int draw_type; /* GLX_WINDOW_SGIX or GLX_PBUFFER_SGIX */
- unsigned int mask; /* mask indicating which buffers are affected*/
- int x, y;
- int width, height;
- int count; /* if nonzero, at least this many more */
-} GLXBufferClobberEventSGIX;
-#endif
-
-#ifndef GLX_NV_video_output
-typedef unsigned int GLXVideoDeviceNV;
-#endif
-
-#ifndef GLX_NV_video_capture
-typedef XID GLXVideoCaptureDeviceNV;
-#endif
-
-#ifndef GLEXT_64_TYPES_DEFINED
-/* This code block is duplicated in glext.h, so must be protected */
-#define GLEXT_64_TYPES_DEFINED
-/* Define int32_t, int64_t, and uint64_t types for UST/MSC */
-/* (as used in the GLX_OML_sync_control extension). */
-#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-#include <inttypes.h>
-#elif defined(__sun__) || defined(__digital__)
-#include <inttypes.h>
-#if defined(__STDC__)
-#if defined(__arch64__) || defined(_LP64)
-typedef long int int64_t;
-typedef unsigned long int uint64_t;
-#else
-typedef long long int int64_t;
-typedef unsigned long long int uint64_t;
-#endif /* __arch64__ */
-#endif /* __STDC__ */
-#elif defined( __VMS ) || defined(__sgi)
-#include <inttypes.h>
-#elif defined(__SCO__) || defined(__USLC__)
-#include <stdint.h>
-#elif defined(__UNIXOS2__) || defined(__SOL64__)
-typedef long int int32_t;
-typedef long long int int64_t;
-typedef unsigned long long int uint64_t;
-#elif defined(_WIN32) && defined(__GNUC__)
-#include <stdint.h>
-#elif defined(_WIN32)
-typedef __int32 int32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-#else
-#include <inttypes.h> /* Fallback option */
-#endif
-#endif
-
-#ifndef GLX_VERSION_1_3
-#define GLX_VERSION_1_3 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern GLXFBConfig * glXGetFBConfigs (Display *dpy, int screen, int *nelements);
-extern GLXFBConfig * glXChooseFBConfig (Display *dpy, int screen, const int *attrib_list, int *nelements);
-extern int glXGetFBConfigAttrib (Display *dpy, GLXFBConfig config, int attribute, int *value);
-extern XVisualInfo * glXGetVisualFromFBConfig (Display *dpy, GLXFBConfig config);
-extern GLXWindow glXCreateWindow (Display *dpy, GLXFBConfig config, Window win, const int *attrib_list);
-extern void glXDestroyWindow (Display *dpy, GLXWindow win);
-extern GLXPixmap glXCreatePixmap (Display *dpy, GLXFBConfig config, Pixmap pixmap, const int *attrib_list);
-extern void glXDestroyPixmap (Display *dpy, GLXPixmap pixmap);
-extern GLXPbuffer glXCreatePbuffer (Display *dpy, GLXFBConfig config, const int *attrib_list);
-extern void glXDestroyPbuffer (Display *dpy, GLXPbuffer pbuf);
-extern void glXQueryDrawable (Display *dpy, GLXDrawable draw, int attribute, unsigned int *value);
-extern GLXContext glXCreateNewContext (Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct);
-extern Bool glXMakeContextCurrent (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
-extern GLXDrawable glXGetCurrentReadDrawable (void);
-extern Display * glXGetCurrentDisplay (void);
-extern int glXQueryContext (Display *dpy, GLXContext ctx, int attribute, int *value);
-extern void glXSelectEvent (Display *dpy, GLXDrawable draw, unsigned long event_mask);
-extern void glXGetSelectedEvent (Display *dpy, GLXDrawable draw, unsigned long *event_mask);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef GLXFBConfig * ( * PFNGLXGETFBCONFIGSPROC) (Display *dpy, int screen, int *nelements);
-typedef GLXFBConfig * ( * PFNGLXCHOOSEFBCONFIGPROC) (Display *dpy, int screen, const int *attrib_list, int *nelements);
-typedef int ( * PFNGLXGETFBCONFIGATTRIBPROC) (Display *dpy, GLXFBConfig config, int attribute, int *value);
-typedef XVisualInfo * ( * PFNGLXGETVISUALFROMFBCONFIGPROC) (Display *dpy, GLXFBConfig config);
-typedef GLXWindow ( * PFNGLXCREATEWINDOWPROC) (Display *dpy, GLXFBConfig config, Window win, const int *attrib_list);
-typedef void ( * PFNGLXDESTROYWINDOWPROC) (Display *dpy, GLXWindow win);
-typedef GLXPixmap ( * PFNGLXCREATEPIXMAPPROC) (Display *dpy, GLXFBConfig config, Pixmap pixmap, const int *attrib_list);
-typedef void ( * PFNGLXDESTROYPIXMAPPROC) (Display *dpy, GLXPixmap pixmap);
-typedef GLXPbuffer ( * PFNGLXCREATEPBUFFERPROC) (Display *dpy, GLXFBConfig config, const int *attrib_list);
-typedef void ( * PFNGLXDESTROYPBUFFERPROC) (Display *dpy, GLXPbuffer pbuf);
-typedef void ( * PFNGLXQUERYDRAWABLEPROC) (Display *dpy, GLXDrawable draw, int attribute, unsigned int *value);
-typedef GLXContext ( * PFNGLXCREATENEWCONTEXTPROC) (Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct);
-typedef Bool ( * PFNGLXMAKECONTEXTCURRENTPROC) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
-typedef GLXDrawable ( * PFNGLXGETCURRENTREADDRAWABLEPROC) (void);
-typedef Display * ( * PFNGLXGETCURRENTDISPLAYPROC) (void);
-typedef int ( * PFNGLXQUERYCONTEXTPROC) (Display *dpy, GLXContext ctx, int attribute, int *value);
-typedef void ( * PFNGLXSELECTEVENTPROC) (Display *dpy, GLXDrawable draw, unsigned long event_mask);
-typedef void ( * PFNGLXGETSELECTEDEVENTPROC) (Display *dpy, GLXDrawable draw, unsigned long *event_mask);
-#endif
-
-#ifndef GLX_VERSION_1_4
-#define GLX_VERSION_1_4 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern __GLXextFuncPtr glXGetProcAddress (const GLubyte *procName);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef __GLXextFuncPtr ( * PFNGLXGETPROCADDRESSPROC) (const GLubyte *procName);
-#endif
-
-#ifndef GLX_ARB_get_proc_address
-#define GLX_ARB_get_proc_address 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern __GLXextFuncPtr glXGetProcAddressARB (const GLubyte *procName);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef __GLXextFuncPtr ( * PFNGLXGETPROCADDRESSARBPROC) (const GLubyte *procName);
-#endif
-
-#ifndef GLX_ARB_multisample
-#define GLX_ARB_multisample 1
-#endif
-
-#ifndef GLX_ARB_fbconfig_float
-#define GLX_ARB_fbconfig_float 1
-#endif
-
-#ifndef GLX_ARB_framebuffer_sRGB
-#define GLX_ARB_framebuffer_sRGB 1
-#endif
-
-#ifndef GLX_ARB_create_context
-#define GLX_ARB_create_context 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern GLXContext glXCreateContextAttribsARB (Display *dpy, GLXFBConfig config, GLXContext share_context, Bool direct, const int *attrib_list);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef GLXContext ( * PFNGLXCREATECONTEXTATTRIBSARBPROC) (Display *dpy, GLXFBConfig config, GLXContext share_context, Bool direct, const int *attrib_list);
-#endif
-
-#ifndef GLX_ARB_create_context_profile
-#define GLX_ARB_create_context_profile 1
-#endif
-
-#ifndef GLX_ARB_create_context_robustness
-#define GLX_ARB_create_context_robustness 1
-#endif
-
-#ifndef GLX_SGIS_multisample
-#define GLX_SGIS_multisample 1
-#endif
-
-#ifndef GLX_EXT_visual_info
-#define GLX_EXT_visual_info 1
-#endif
-
-#ifndef GLX_SGI_swap_control
-#define GLX_SGI_swap_control 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXSwapIntervalSGI (int interval);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXSWAPINTERVALSGIPROC) (int interval);
-#endif
-
-#ifndef GLX_SGI_video_sync
-#define GLX_SGI_video_sync 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXGetVideoSyncSGI (unsigned int *count);
-extern int glXWaitVideoSyncSGI (int divisor, int remainder, unsigned int *count);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXGETVIDEOSYNCSGIPROC) (unsigned int *count);
-typedef int ( * PFNGLXWAITVIDEOSYNCSGIPROC) (int divisor, int remainder, unsigned int *count);
-#endif
-
-#ifndef GLX_SGI_make_current_read
-#define GLX_SGI_make_current_read 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Bool glXMakeCurrentReadSGI (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
-extern GLXDrawable glXGetCurrentReadDrawableSGI (void);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Bool ( * PFNGLXMAKECURRENTREADSGIPROC) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
-typedef GLXDrawable ( * PFNGLXGETCURRENTREADDRAWABLESGIPROC) (void);
-#endif
-
-#ifndef GLX_SGIX_video_source
-#define GLX_SGIX_video_source 1
-#ifdef _VL_H
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern GLXVideoSourceSGIX glXCreateGLXVideoSourceSGIX (Display *display, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode);
-extern void glXDestroyGLXVideoSourceSGIX (Display *dpy, GLXVideoSourceSGIX glxvideosource);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef GLXVideoSourceSGIX ( * PFNGLXCREATEGLXVIDEOSOURCESGIXPROC) (Display *display, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode);
-typedef void ( * PFNGLXDESTROYGLXVIDEOSOURCESGIXPROC) (Display *dpy, GLXVideoSourceSGIX glxvideosource);
-#endif /* _VL_H */
-#endif
-
-#ifndef GLX_EXT_visual_rating
-#define GLX_EXT_visual_rating 1
-#endif
-
-#ifndef GLX_EXT_import_context
-#define GLX_EXT_import_context 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Display * glXGetCurrentDisplayEXT (void);
-extern int glXQueryContextInfoEXT (Display *dpy, GLXContext context, int attribute, int *value);
-extern GLXContextID glXGetContextIDEXT (const GLXContext context);
-extern GLXContext glXImportContextEXT (Display *dpy, GLXContextID contextID);
-extern void glXFreeContextEXT (Display *dpy, GLXContext context);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Display * ( * PFNGLXGETCURRENTDISPLAYEXTPROC) (void);
-typedef int ( * PFNGLXQUERYCONTEXTINFOEXTPROC) (Display *dpy, GLXContext context, int attribute, int *value);
-typedef GLXContextID ( * PFNGLXGETCONTEXTIDEXTPROC) (const GLXContext context);
-typedef GLXContext ( * PFNGLXIMPORTCONTEXTEXTPROC) (Display *dpy, GLXContextID contextID);
-typedef void ( * PFNGLXFREECONTEXTEXTPROC) (Display *dpy, GLXContext context);
-#endif
-
-#ifndef GLX_SGIX_fbconfig
-#define GLX_SGIX_fbconfig 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXGetFBConfigAttribSGIX (Display *dpy, GLXFBConfigSGIX config, int attribute, int *value);
-extern GLXFBConfigSGIX * glXChooseFBConfigSGIX (Display *dpy, int screen, int *attrib_list, int *nelements);
-extern GLXPixmap glXCreateGLXPixmapWithConfigSGIX (Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap);
-extern GLXContext glXCreateContextWithConfigSGIX (Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct);
-extern XVisualInfo * glXGetVisualFromFBConfigSGIX (Display *dpy, GLXFBConfigSGIX config);
-extern GLXFBConfigSGIX glXGetFBConfigFromVisualSGIX (Display *dpy, XVisualInfo *vis);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXGETFBCONFIGATTRIBSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, int attribute, int *value);
-typedef GLXFBConfigSGIX * ( * PFNGLXCHOOSEFBCONFIGSGIXPROC) (Display *dpy, int screen, int *attrib_list, int *nelements);
-typedef GLXPixmap ( * PFNGLXCREATEGLXPIXMAPWITHCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap);
-typedef GLXContext ( * PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct);
-typedef XVisualInfo * ( * PFNGLXGETVISUALFROMFBCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config);
-typedef GLXFBConfigSGIX ( * PFNGLXGETFBCONFIGFROMVISUALSGIXPROC) (Display *dpy, XVisualInfo *vis);
-#endif
-
-#ifndef GLX_SGIX_pbuffer
-#define GLX_SGIX_pbuffer 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern GLXPbufferSGIX glXCreateGLXPbufferSGIX (Display *dpy, GLXFBConfigSGIX config, unsigned int width, unsigned int height, int *attrib_list);
-extern void glXDestroyGLXPbufferSGIX (Display *dpy, GLXPbufferSGIX pbuf);
-extern int glXQueryGLXPbufferSGIX (Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value);
-extern void glXSelectEventSGIX (Display *dpy, GLXDrawable drawable, unsigned long mask);
-extern void glXGetSelectedEventSGIX (Display *dpy, GLXDrawable drawable, unsigned long *mask);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef GLXPbufferSGIX ( * PFNGLXCREATEGLXPBUFFERSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, unsigned int width, unsigned int height, int *attrib_list);
-typedef void ( * PFNGLXDESTROYGLXPBUFFERSGIXPROC) (Display *dpy, GLXPbufferSGIX pbuf);
-typedef int ( * PFNGLXQUERYGLXPBUFFERSGIXPROC) (Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value);
-typedef void ( * PFNGLXSELECTEVENTSGIXPROC) (Display *dpy, GLXDrawable drawable, unsigned long mask);
-typedef void ( * PFNGLXGETSELECTEDEVENTSGIXPROC) (Display *dpy, GLXDrawable drawable, unsigned long *mask);
-#endif
-
-#ifndef GLX_SGI_cushion
-#define GLX_SGI_cushion 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern void glXCushionSGI (Display *dpy, Window window, float cushion);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef void ( * PFNGLXCUSHIONSGIPROC) (Display *dpy, Window window, float cushion);
-#endif
-
-#ifndef GLX_SGIX_video_resize
-#define GLX_SGIX_video_resize 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXBindChannelToWindowSGIX (Display *display, int screen, int channel, Window window);
-extern int glXChannelRectSGIX (Display *display, int screen, int channel, int x, int y, int w, int h);
-extern int glXQueryChannelRectSGIX (Display *display, int screen, int channel, int *dx, int *dy, int *dw, int *dh);
-extern int glXQueryChannelDeltasSGIX (Display *display, int screen, int channel, int *x, int *y, int *w, int *h);
-extern int glXChannelRectSyncSGIX (Display *display, int screen, int channel, GLenum synctype);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXBINDCHANNELTOWINDOWSGIXPROC) (Display *display, int screen, int channel, Window window);
-typedef int ( * PFNGLXCHANNELRECTSGIXPROC) (Display *display, int screen, int channel, int x, int y, int w, int h);
-typedef int ( * PFNGLXQUERYCHANNELRECTSGIXPROC) (Display *display, int screen, int channel, int *dx, int *dy, int *dw, int *dh);
-typedef int ( * PFNGLXQUERYCHANNELDELTASSGIXPROC) (Display *display, int screen, int channel, int *x, int *y, int *w, int *h);
-typedef int ( * PFNGLXCHANNELRECTSYNCSGIXPROC) (Display *display, int screen, int channel, GLenum synctype);
-#endif
-
-#ifndef GLX_SGIX_dmbuffer
-#define GLX_SGIX_dmbuffer 1
-#ifdef _DM_BUFFER_H_
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Bool glXAssociateDMPbufferSGIX (Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Bool ( * PFNGLXASSOCIATEDMPBUFFERSGIXPROC) (Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer);
-#endif /* _DM_BUFFER_H_ */
-#endif
-
-#ifndef GLX_SGIX_swap_group
-#define GLX_SGIX_swap_group 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern void glXJoinSwapGroupSGIX (Display *dpy, GLXDrawable drawable, GLXDrawable member);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef void ( * PFNGLXJOINSWAPGROUPSGIXPROC) (Display *dpy, GLXDrawable drawable, GLXDrawable member);
-#endif
-
-#ifndef GLX_SGIX_swap_barrier
-#define GLX_SGIX_swap_barrier 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern void glXBindSwapBarrierSGIX (Display *dpy, GLXDrawable drawable, int barrier);
-extern Bool glXQueryMaxSwapBarriersSGIX (Display *dpy, int screen, int *max);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef void ( * PFNGLXBINDSWAPBARRIERSGIXPROC) (Display *dpy, GLXDrawable drawable, int barrier);
-typedef Bool ( * PFNGLXQUERYMAXSWAPBARRIERSSGIXPROC) (Display *dpy, int screen, int *max);
-#endif
-
-#ifndef GLX_SUN_get_transparent_index
-#define GLX_SUN_get_transparent_index 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Status glXGetTransparentIndexSUN (Display *dpy, Window overlay, Window underlay, long *pTransparentIndex);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Status ( * PFNGLXGETTRANSPARENTINDEXSUNPROC) (Display *dpy, Window overlay, Window underlay, long *pTransparentIndex);
-#endif
-
-#ifndef GLX_MESA_copy_sub_buffer
-#define GLX_MESA_copy_sub_buffer 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern void glXCopySubBufferMESA (Display *dpy, GLXDrawable drawable, int x, int y, int width, int height);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef void ( * PFNGLXCOPYSUBBUFFERMESAPROC) (Display *dpy, GLXDrawable drawable, int x, int y, int width, int height);
-#endif
-
-#ifndef GLX_MESA_pixmap_colormap
-#define GLX_MESA_pixmap_colormap 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern GLXPixmap glXCreateGLXPixmapMESA (Display *dpy, XVisualInfo *visual, Pixmap pixmap, Colormap cmap);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef GLXPixmap ( * PFNGLXCREATEGLXPIXMAPMESAPROC) (Display *dpy, XVisualInfo *visual, Pixmap pixmap, Colormap cmap);
-#endif
-
-#ifndef GLX_MESA_release_buffers
-#define GLX_MESA_release_buffers 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Bool glXReleaseBuffersMESA (Display *dpy, GLXDrawable drawable);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Bool ( * PFNGLXRELEASEBUFFERSMESAPROC) (Display *dpy, GLXDrawable drawable);
-#endif
-
-#ifndef GLX_MESA_set_3dfx_mode
-#define GLX_MESA_set_3dfx_mode 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Bool glXSet3DfxModeMESA (int mode);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Bool ( * PFNGLXSET3DFXMODEMESAPROC) (int mode);
-#endif
-
-#ifndef GLX_SGIX_visual_select_group
-#define GLX_SGIX_visual_select_group 1
-#endif
-
-#ifndef GLX_OML_swap_method
-#define GLX_OML_swap_method 1
-#endif
-
-#ifndef GLX_OML_sync_control
-#define GLX_OML_sync_control 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Bool glXGetSyncValuesOML (Display *dpy, GLXDrawable drawable, int64_t *ust, int64_t *msc, int64_t *sbc);
-extern Bool glXGetMscRateOML (Display *dpy, GLXDrawable drawable, int32_t *numerator, int32_t *denominator);
-extern int64_t glXSwapBuffersMscOML (Display *dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder);
-extern Bool glXWaitForMscOML (Display *dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc);
-extern Bool glXWaitForSbcOML (Display *dpy, GLXDrawable drawable, int64_t target_sbc, int64_t *ust, int64_t *msc, int64_t *sbc);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Bool ( * PFNGLXGETSYNCVALUESOMLPROC) (Display *dpy, GLXDrawable drawable, int64_t *ust, int64_t *msc, int64_t *sbc);
-typedef Bool ( * PFNGLXGETMSCRATEOMLPROC) (Display *dpy, GLXDrawable drawable, int32_t *numerator, int32_t *denominator);
-typedef int64_t ( * PFNGLXSWAPBUFFERSMSCOMLPROC) (Display *dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder);
-typedef Bool ( * PFNGLXWAITFORMSCOMLPROC) (Display *dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc);
-typedef Bool ( * PFNGLXWAITFORSBCOMLPROC) (Display *dpy, GLXDrawable drawable, int64_t target_sbc, int64_t *ust, int64_t *msc, int64_t *sbc);
-#endif
-
-#ifndef GLX_NV_float_buffer
-#define GLX_NV_float_buffer 1
-#endif
-
-#ifndef GLX_SGIX_hyperpipe
-#define GLX_SGIX_hyperpipe 1
-
-typedef struct {
- char pipeName[GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX];
- int networkId;
-} GLXHyperpipeNetworkSGIX;
-
-typedef struct {
- char pipeName[GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX];
- int channel;
- unsigned int
- participationType;
- int timeSlice;
-} GLXHyperpipeConfigSGIX;
-
-typedef struct {
- char pipeName[GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX];
- int srcXOrigin, srcYOrigin, srcWidth, srcHeight;
- int destXOrigin, destYOrigin, destWidth, destHeight;
-} GLXPipeRect;
-
-typedef struct {
- char pipeName[GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX];
- int XOrigin, YOrigin, maxHeight, maxWidth;
-} GLXPipeRectLimits;
-
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern GLXHyperpipeNetworkSGIX * glXQueryHyperpipeNetworkSGIX (Display *dpy, int *npipes);
-extern int glXHyperpipeConfigSGIX (Display *dpy, int networkId, int npipes, GLXHyperpipeConfigSGIX *cfg, int *hpId);
-extern GLXHyperpipeConfigSGIX * glXQueryHyperpipeConfigSGIX (Display *dpy, int hpId, int *npipes);
-extern int glXDestroyHyperpipeConfigSGIX (Display *dpy, int hpId);
-extern int glXBindHyperpipeSGIX (Display *dpy, int hpId);
-extern int glXQueryHyperpipeBestAttribSGIX (Display *dpy, int timeSlice, int attrib, int size, void *attribList, void *returnAttribList);
-extern int glXHyperpipeAttribSGIX (Display *dpy, int timeSlice, int attrib, int size, void *attribList);
-extern int glXQueryHyperpipeAttribSGIX (Display *dpy, int timeSlice, int attrib, int size, void *returnAttribList);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef GLXHyperpipeNetworkSGIX * ( * PFNGLXQUERYHYPERPIPENETWORKSGIXPROC) (Display *dpy, int *npipes);
-typedef int ( * PFNGLXHYPERPIPECONFIGSGIXPROC) (Display *dpy, int networkId, int npipes, GLXHyperpipeConfigSGIX *cfg, int *hpId);
-typedef GLXHyperpipeConfigSGIX * ( * PFNGLXQUERYHYPERPIPECONFIGSGIXPROC) (Display *dpy, int hpId, int *npipes);
-typedef int ( * PFNGLXDESTROYHYPERPIPECONFIGSGIXPROC) (Display *dpy, int hpId);
-typedef int ( * PFNGLXBINDHYPERPIPESGIXPROC) (Display *dpy, int hpId);
-typedef int ( * PFNGLXQUERYHYPERPIPEBESTATTRIBSGIXPROC) (Display *dpy, int timeSlice, int attrib, int size, void *attribList, void *returnAttribList);
-typedef int ( * PFNGLXHYPERPIPEATTRIBSGIXPROC) (Display *dpy, int timeSlice, int attrib, int size, void *attribList);
-typedef int ( * PFNGLXQUERYHYPERPIPEATTRIBSGIXPROC) (Display *dpy, int timeSlice, int attrib, int size, void *returnAttribList);
-#endif
-
-#ifndef GLX_MESA_agp_offset
-#define GLX_MESA_agp_offset 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern unsigned int glXGetAGPOffsetMESA (const void *pointer);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef unsigned int ( * PFNGLXGETAGPOFFSETMESAPROC) (const void *pointer);
-#endif
-
-#ifndef GLX_EXT_fbconfig_packed_float
-#define GLX_EXT_fbconfig_packed_float 1
-#endif
-
-#ifndef GLX_EXT_framebuffer_sRGB
-#define GLX_EXT_framebuffer_sRGB 1
-#endif
-
-#ifndef GLX_EXT_texture_from_pixmap
-#define GLX_EXT_texture_from_pixmap 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern void glXBindTexImageEXT (Display *dpy, GLXDrawable drawable, int buffer, const int *attrib_list);
-extern void glXReleaseTexImageEXT (Display *dpy, GLXDrawable drawable, int buffer);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef void ( * PFNGLXBINDTEXIMAGEEXTPROC) (Display *dpy, GLXDrawable drawable, int buffer, const int *attrib_list);
-typedef void ( * PFNGLXRELEASETEXIMAGEEXTPROC) (Display *dpy, GLXDrawable drawable, int buffer);
-#endif
-
-#ifndef GLX_NV_present_video
-#define GLX_NV_present_video 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern unsigned int * glXEnumerateVideoDevicesNV (Display *dpy, int screen, int *nelements);
-extern int glXBindVideoDeviceNV (Display *dpy, unsigned int video_slot, unsigned int video_device, const int *attrib_list);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef unsigned int * ( * PFNGLXENUMERATEVIDEODEVICESNVPROC) (Display *dpy, int screen, int *nelements);
-typedef int ( * PFNGLXBINDVIDEODEVICENVPROC) (Display *dpy, unsigned int video_slot, unsigned int video_device, const int *attrib_list);
-#endif
-
-#ifndef GLX_NV_video_output
-#define GLX_NV_video_output 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXGetVideoDeviceNV (Display *dpy, int screen, int numVideoDevices, GLXVideoDeviceNV *pVideoDevice);
-extern int glXReleaseVideoDeviceNV (Display *dpy, int screen, GLXVideoDeviceNV VideoDevice);
-extern int glXBindVideoImageNV (Display *dpy, GLXVideoDeviceNV VideoDevice, GLXPbuffer pbuf, int iVideoBuffer);
-extern int glXReleaseVideoImageNV (Display *dpy, GLXPbuffer pbuf);
-extern int glXSendPbufferToVideoNV (Display *dpy, GLXPbuffer pbuf, int iBufferType, unsigned long *pulCounterPbuffer, GLboolean bBlock);
-extern int glXGetVideoInfoNV (Display *dpy, int screen, GLXVideoDeviceNV VideoDevice, unsigned long *pulCounterOutputPbuffer, unsigned long *pulCounterOutputVideo);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXGETVIDEODEVICENVPROC) (Display *dpy, int screen, int numVideoDevices, GLXVideoDeviceNV *pVideoDevice);
-typedef int ( * PFNGLXRELEASEVIDEODEVICENVPROC) (Display *dpy, int screen, GLXVideoDeviceNV VideoDevice);
-typedef int ( * PFNGLXBINDVIDEOIMAGENVPROC) (Display *dpy, GLXVideoDeviceNV VideoDevice, GLXPbuffer pbuf, int iVideoBuffer);
-typedef int ( * PFNGLXRELEASEVIDEOIMAGENVPROC) (Display *dpy, GLXPbuffer pbuf);
-typedef int ( * PFNGLXSENDPBUFFERTOVIDEONVPROC) (Display *dpy, GLXPbuffer pbuf, int iBufferType, unsigned long *pulCounterPbuffer, GLboolean bBlock);
-typedef int ( * PFNGLXGETVIDEOINFONVPROC) (Display *dpy, int screen, GLXVideoDeviceNV VideoDevice, unsigned long *pulCounterOutputPbuffer, unsigned long *pulCounterOutputVideo);
-#endif
-
-#ifndef GLX_NV_swap_group
-#define GLX_NV_swap_group 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Bool glXJoinSwapGroupNV (Display *dpy, GLXDrawable drawable, GLuint group);
-extern Bool glXBindSwapBarrierNV (Display *dpy, GLuint group, GLuint barrier);
-extern Bool glXQuerySwapGroupNV (Display *dpy, GLXDrawable drawable, GLuint *group, GLuint *barrier);
-extern Bool glXQueryMaxSwapGroupsNV (Display *dpy, int screen, GLuint *maxGroups, GLuint *maxBarriers);
-extern Bool glXQueryFrameCountNV (Display *dpy, int screen, GLuint *count);
-extern Bool glXResetFrameCountNV (Display *dpy, int screen);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Bool ( * PFNGLXJOINSWAPGROUPNVPROC) (Display *dpy, GLXDrawable drawable, GLuint group);
-typedef Bool ( * PFNGLXBINDSWAPBARRIERNVPROC) (Display *dpy, GLuint group, GLuint barrier);
-typedef Bool ( * PFNGLXQUERYSWAPGROUPNVPROC) (Display *dpy, GLXDrawable drawable, GLuint *group, GLuint *barrier);
-typedef Bool ( * PFNGLXQUERYMAXSWAPGROUPSNVPROC) (Display *dpy, int screen, GLuint *maxGroups, GLuint *maxBarriers);
-typedef Bool ( * PFNGLXQUERYFRAMECOUNTNVPROC) (Display *dpy, int screen, GLuint *count);
-typedef Bool ( * PFNGLXRESETFRAMECOUNTNVPROC) (Display *dpy, int screen);
-#endif
-
-#ifndef GLX_NV_video_capture
-#define GLX_NV_video_capture 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXBindVideoCaptureDeviceNV (Display *dpy, unsigned int video_capture_slot, GLXVideoCaptureDeviceNV device);
-extern GLXVideoCaptureDeviceNV * glXEnumerateVideoCaptureDevicesNV (Display *dpy, int screen, int *nelements);
-extern void glXLockVideoCaptureDeviceNV (Display *dpy, GLXVideoCaptureDeviceNV device);
-extern int glXQueryVideoCaptureDeviceNV (Display *dpy, GLXVideoCaptureDeviceNV device, int attribute, int *value);
-extern void glXReleaseVideoCaptureDeviceNV (Display *dpy, GLXVideoCaptureDeviceNV device);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXBINDVIDEOCAPTUREDEVICENVPROC) (Display *dpy, unsigned int video_capture_slot, GLXVideoCaptureDeviceNV device);
-typedef GLXVideoCaptureDeviceNV * ( * PFNGLXENUMERATEVIDEOCAPTUREDEVICESNVPROC) (Display *dpy, int screen, int *nelements);
-typedef void ( * PFNGLXLOCKVIDEOCAPTUREDEVICENVPROC) (Display *dpy, GLXVideoCaptureDeviceNV device);
-typedef int ( * PFNGLXQUERYVIDEOCAPTUREDEVICENVPROC) (Display *dpy, GLXVideoCaptureDeviceNV device, int attribute, int *value);
-typedef void ( * PFNGLXRELEASEVIDEOCAPTUREDEVICENVPROC) (Display *dpy, GLXVideoCaptureDeviceNV device);
-#endif
-
-#ifndef GLX_EXT_swap_control
-#define GLX_EXT_swap_control 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXSwapIntervalEXT (Display *dpy, GLXDrawable drawable, int interval);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXSWAPINTERVALEXTPROC) (Display *dpy, GLXDrawable drawable, int interval);
-#endif
-
-#ifndef GLX_NV_copy_image
-#define GLX_NV_copy_image 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern void glXCopyImageSubDataNV (Display *dpy, GLXContext srcCtx, GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLXContext dstCtx, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef void ( * PFNGLXCOPYIMAGESUBDATANVPROC) (Display *dpy, GLXContext srcCtx, GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLXContext dstCtx, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
-#endif
-
-#ifndef GLX_INTEL_swap_event
-#define GLX_INTEL_swap_event 1
-#endif
-
-#ifndef GLX_NV_multisample_coverage
-#define GLX_NV_multisample_coverage 1
-#endif
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
+++ /dev/null
-#ifndef __wglext_h_
-#define __wglext_h_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/*
-** Copyright (c) 2007-2010 The Khronos Group Inc.
-**
-** Permission is hereby granted, free of charge, to any person obtaining a
-** copy of this software and/or associated documentation files (the
-** "Materials"), to deal in the Materials without restriction, including
-** without limitation the rights to use, copy, modify, merge, publish,
-** distribute, sublicense, and/or sell copies of the Materials, and to
-** permit persons to whom the Materials are furnished to do so, subject to
-** the following conditions:
-**
-** The above copyright notice and this permission notice shall be included
-** in all copies or substantial portions of the Materials.
-**
-** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
-*/
-
-/* Function declaration macros - to move into glplatform.h */
-
-#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
-#define WIN32_LEAN_AND_MEAN 1
-#include <windows.h>
-#endif
-
-#ifndef APIENTRY
-#define APIENTRY
-#endif
-#ifndef APIENTRYP
-#define APIENTRYP APIENTRY *
-#endif
-#ifndef GLAPI
-#define GLAPI extern
-#endif
-
-/*************************************************************/
-
-/* Header file version number */
-/* wglext.h last updated 2010/08/06 */
-/* Current version at http://www.opengl.org/registry/ */
-#define WGL_WGLEXT_VERSION 22
-
-#ifndef WGL_ARB_buffer_region
-#define WGL_FRONT_COLOR_BUFFER_BIT_ARB 0x00000001
-#define WGL_BACK_COLOR_BUFFER_BIT_ARB 0x00000002
-#define WGL_DEPTH_BUFFER_BIT_ARB 0x00000004
-#define WGL_STENCIL_BUFFER_BIT_ARB 0x00000008
-#endif
-
-#ifndef WGL_ARB_multisample
-#define WGL_SAMPLE_BUFFERS_ARB 0x2041
-#define WGL_SAMPLES_ARB 0x2042
-#endif
-
-#ifndef WGL_ARB_extensions_string
-#endif
-
-#ifndef WGL_ARB_pixel_format
-#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
-#define WGL_DRAW_TO_WINDOW_ARB 0x2001
-#define WGL_DRAW_TO_BITMAP_ARB 0x2002
-#define WGL_ACCELERATION_ARB 0x2003
-#define WGL_NEED_PALETTE_ARB 0x2004
-#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
-#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
-#define WGL_SWAP_METHOD_ARB 0x2007
-#define WGL_NUMBER_OVERLAYS_ARB 0x2008
-#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
-#define WGL_TRANSPARENT_ARB 0x200A
-#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
-#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
-#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
-#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
-#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
-#define WGL_SHARE_DEPTH_ARB 0x200C
-#define WGL_SHARE_STENCIL_ARB 0x200D
-#define WGL_SHARE_ACCUM_ARB 0x200E
-#define WGL_SUPPORT_GDI_ARB 0x200F
-#define WGL_SUPPORT_OPENGL_ARB 0x2010
-#define WGL_DOUBLE_BUFFER_ARB 0x2011
-#define WGL_STEREO_ARB 0x2012
-#define WGL_PIXEL_TYPE_ARB 0x2013
-#define WGL_COLOR_BITS_ARB 0x2014
-#define WGL_RED_BITS_ARB 0x2015
-#define WGL_RED_SHIFT_ARB 0x2016
-#define WGL_GREEN_BITS_ARB 0x2017
-#define WGL_GREEN_SHIFT_ARB 0x2018
-#define WGL_BLUE_BITS_ARB 0x2019
-#define WGL_BLUE_SHIFT_ARB 0x201A
-#define WGL_ALPHA_BITS_ARB 0x201B
-#define WGL_ALPHA_SHIFT_ARB 0x201C
-#define WGL_ACCUM_BITS_ARB 0x201D
-#define WGL_ACCUM_RED_BITS_ARB 0x201E
-#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
-#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
-#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
-#define WGL_DEPTH_BITS_ARB 0x2022
-#define WGL_STENCIL_BITS_ARB 0x2023
-#define WGL_AUX_BUFFERS_ARB 0x2024
-#define WGL_NO_ACCELERATION_ARB 0x2025
-#define WGL_GENERIC_ACCELERATION_ARB 0x2026
-#define WGL_FULL_ACCELERATION_ARB 0x2027
-#define WGL_SWAP_EXCHANGE_ARB 0x2028
-#define WGL_SWAP_COPY_ARB 0x2029
-#define WGL_SWAP_UNDEFINED_ARB 0x202A
-#define WGL_TYPE_RGBA_ARB 0x202B
-#define WGL_TYPE_COLORINDEX_ARB 0x202C
-#endif
-
-#ifndef WGL_ARB_make_current_read
-#define ERROR_INVALID_PIXEL_TYPE_ARB 0x2043
-#define ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB 0x2054
-#endif
-
-#ifndef WGL_ARB_pbuffer
-#define WGL_DRAW_TO_PBUFFER_ARB 0x202D
-#define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E
-#define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F
-#define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030
-#define WGL_PBUFFER_LARGEST_ARB 0x2033
-#define WGL_PBUFFER_WIDTH_ARB 0x2034
-#define WGL_PBUFFER_HEIGHT_ARB 0x2035
-#define WGL_PBUFFER_LOST_ARB 0x2036
-#endif
-
-#ifndef WGL_ARB_render_texture
-#define WGL_BIND_TO_TEXTURE_RGB_ARB 0x2070
-#define WGL_BIND_TO_TEXTURE_RGBA_ARB 0x2071
-#define WGL_TEXTURE_FORMAT_ARB 0x2072
-#define WGL_TEXTURE_TARGET_ARB 0x2073
-#define WGL_MIPMAP_TEXTURE_ARB 0x2074
-#define WGL_TEXTURE_RGB_ARB 0x2075
-#define WGL_TEXTURE_RGBA_ARB 0x2076
-#define WGL_NO_TEXTURE_ARB 0x2077
-#define WGL_TEXTURE_CUBE_MAP_ARB 0x2078
-#define WGL_TEXTURE_1D_ARB 0x2079
-#define WGL_TEXTURE_2D_ARB 0x207A
-#define WGL_MIPMAP_LEVEL_ARB 0x207B
-#define WGL_CUBE_MAP_FACE_ARB 0x207C
-#define WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x207D
-#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x207E
-#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x207F
-#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x2080
-#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x2081
-#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x2082
-#define WGL_FRONT_LEFT_ARB 0x2083
-#define WGL_FRONT_RIGHT_ARB 0x2084
-#define WGL_BACK_LEFT_ARB 0x2085
-#define WGL_BACK_RIGHT_ARB 0x2086
-#define WGL_AUX0_ARB 0x2087
-#define WGL_AUX1_ARB 0x2088
-#define WGL_AUX2_ARB 0x2089
-#define WGL_AUX3_ARB 0x208A
-#define WGL_AUX4_ARB 0x208B
-#define WGL_AUX5_ARB 0x208C
-#define WGL_AUX6_ARB 0x208D
-#define WGL_AUX7_ARB 0x208E
-#define WGL_AUX8_ARB 0x208F
-#define WGL_AUX9_ARB 0x2090
-#endif
-
-#ifndef WGL_ARB_pixel_format_float
-#define WGL_TYPE_RGBA_FLOAT_ARB 0x21A0
-#endif
-
-#ifndef WGL_ARB_framebuffer_sRGB
-#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20A9
-#endif
-
-#ifndef WGL_ARB_create_context
-#define WGL_CONTEXT_DEBUG_BIT_ARB 0x00000001
-#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
-#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
-#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
-#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
-#define WGL_CONTEXT_FLAGS_ARB 0x2094
-#define ERROR_INVALID_VERSION_ARB 0x2095
-#endif
-
-#ifndef WGL_ARB_create_context_profile
-#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
-#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
-#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
-#define ERROR_INVALID_PROFILE_ARB 0x2096
-#endif
-
-#ifndef WGL_ARB_create_context_robustness
-#define WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB 0x00000004
-#define WGL_LOSE_CONTEXT_ON_RESET_ARB 0x8252
-#define WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
-#define WGL_NO_RESET_NOTIFICATION_ARB 0x8261
-#endif
-
-#ifndef WGL_EXT_make_current_read
-#define ERROR_INVALID_PIXEL_TYPE_EXT 0x2043
-#endif
-
-#ifndef WGL_EXT_pixel_format
-#define WGL_NUMBER_PIXEL_FORMATS_EXT 0x2000
-#define WGL_DRAW_TO_WINDOW_EXT 0x2001
-#define WGL_DRAW_TO_BITMAP_EXT 0x2002
-#define WGL_ACCELERATION_EXT 0x2003
-#define WGL_NEED_PALETTE_EXT 0x2004
-#define WGL_NEED_SYSTEM_PALETTE_EXT 0x2005
-#define WGL_SWAP_LAYER_BUFFERS_EXT 0x2006
-#define WGL_SWAP_METHOD_EXT 0x2007
-#define WGL_NUMBER_OVERLAYS_EXT 0x2008
-#define WGL_NUMBER_UNDERLAYS_EXT 0x2009
-#define WGL_TRANSPARENT_EXT 0x200A
-#define WGL_TRANSPARENT_VALUE_EXT 0x200B
-#define WGL_SHARE_DEPTH_EXT 0x200C
-#define WGL_SHARE_STENCIL_EXT 0x200D
-#define WGL_SHARE_ACCUM_EXT 0x200E
-#define WGL_SUPPORT_GDI_EXT 0x200F
-#define WGL_SUPPORT_OPENGL_EXT 0x2010
-#define WGL_DOUBLE_BUFFER_EXT 0x2011
-#define WGL_STEREO_EXT 0x2012
-#define WGL_PIXEL_TYPE_EXT 0x2013
-#define WGL_COLOR_BITS_EXT 0x2014
-#define WGL_RED_BITS_EXT 0x2015
-#define WGL_RED_SHIFT_EXT 0x2016
-#define WGL_GREEN_BITS_EXT 0x2017
-#define WGL_GREEN_SHIFT_EXT 0x2018
-#define WGL_BLUE_BITS_EXT 0x2019
-#define WGL_BLUE_SHIFT_EXT 0x201A
-#define WGL_ALPHA_BITS_EXT 0x201B
-#define WGL_ALPHA_SHIFT_EXT 0x201C
-#define WGL_ACCUM_BITS_EXT 0x201D
-#define WGL_ACCUM_RED_BITS_EXT 0x201E
-#define WGL_ACCUM_GREEN_BITS_EXT 0x201F
-#define WGL_ACCUM_BLUE_BITS_EXT 0x2020
-#define WGL_ACCUM_ALPHA_BITS_EXT 0x2021
-#define WGL_DEPTH_BITS_EXT 0x2022
-#define WGL_STENCIL_BITS_EXT 0x2023
-#define WGL_AUX_BUFFERS_EXT 0x2024
-#define WGL_NO_ACCELERATION_EXT 0x2025
-#define WGL_GENERIC_ACCELERATION_EXT 0x2026
-#define WGL_FULL_ACCELERATION_EXT 0x2027
-#define WGL_SWAP_EXCHANGE_EXT 0x2028
-#define WGL_SWAP_COPY_EXT 0x2029
-#define WGL_SWAP_UNDEFINED_EXT 0x202A
-#define WGL_TYPE_RGBA_EXT 0x202B
-#define WGL_TYPE_COLORINDEX_EXT 0x202C
-#endif
-
-#ifndef WGL_EXT_pbuffer
-#define WGL_DRAW_TO_PBUFFER_EXT 0x202D
-#define WGL_MAX_PBUFFER_PIXELS_EXT 0x202E
-#define WGL_MAX_PBUFFER_WIDTH_EXT 0x202F
-#define WGL_MAX_PBUFFER_HEIGHT_EXT 0x2030
-#define WGL_OPTIMAL_PBUFFER_WIDTH_EXT 0x2031
-#define WGL_OPTIMAL_PBUFFER_HEIGHT_EXT 0x2032
-#define WGL_PBUFFER_LARGEST_EXT 0x2033
-#define WGL_PBUFFER_WIDTH_EXT 0x2034
-#define WGL_PBUFFER_HEIGHT_EXT 0x2035
-#endif
-
-#ifndef WGL_EXT_depth_float
-#define WGL_DEPTH_FLOAT_EXT 0x2040
-#endif
-
-#ifndef WGL_3DFX_multisample
-#define WGL_SAMPLE_BUFFERS_3DFX 0x2060
-#define WGL_SAMPLES_3DFX 0x2061
-#endif
-
-#ifndef WGL_EXT_multisample
-#define WGL_SAMPLE_BUFFERS_EXT 0x2041
-#define WGL_SAMPLES_EXT 0x2042
-#endif
-
-#ifndef WGL_I3D_digital_video_control
-#define WGL_DIGITAL_VIDEO_CURSOR_ALPHA_FRAMEBUFFER_I3D 0x2050
-#define WGL_DIGITAL_VIDEO_CURSOR_ALPHA_VALUE_I3D 0x2051
-#define WGL_DIGITAL_VIDEO_CURSOR_INCLUDED_I3D 0x2052
-#define WGL_DIGITAL_VIDEO_GAMMA_CORRECTED_I3D 0x2053
-#endif
-
-#ifndef WGL_I3D_gamma
-#define WGL_GAMMA_TABLE_SIZE_I3D 0x204E
-#define WGL_GAMMA_EXCLUDE_DESKTOP_I3D 0x204F
-#endif
-
-#ifndef WGL_I3D_genlock
-#define WGL_GENLOCK_SOURCE_MULTIVIEW_I3D 0x2044
-#define WGL_GENLOCK_SOURCE_EXTENAL_SYNC_I3D 0x2045
-#define WGL_GENLOCK_SOURCE_EXTENAL_FIELD_I3D 0x2046
-#define WGL_GENLOCK_SOURCE_EXTENAL_TTL_I3D 0x2047
-#define WGL_GENLOCK_SOURCE_DIGITAL_SYNC_I3D 0x2048
-#define WGL_GENLOCK_SOURCE_DIGITAL_FIELD_I3D 0x2049
-#define WGL_GENLOCK_SOURCE_EDGE_FALLING_I3D 0x204A
-#define WGL_GENLOCK_SOURCE_EDGE_RISING_I3D 0x204B
-#define WGL_GENLOCK_SOURCE_EDGE_BOTH_I3D 0x204C
-#endif
-
-#ifndef WGL_I3D_image_buffer
-#define WGL_IMAGE_BUFFER_MIN_ACCESS_I3D 0x00000001
-#define WGL_IMAGE_BUFFER_LOCK_I3D 0x00000002
-#endif
-
-#ifndef WGL_I3D_swap_frame_lock
-#endif
-
-#ifndef WGL_NV_render_depth_texture
-#define WGL_BIND_TO_TEXTURE_DEPTH_NV 0x20A3
-#define WGL_BIND_TO_TEXTURE_RECTANGLE_DEPTH_NV 0x20A4
-#define WGL_DEPTH_TEXTURE_FORMAT_NV 0x20A5
-#define WGL_TEXTURE_DEPTH_COMPONENT_NV 0x20A6
-#define WGL_DEPTH_COMPONENT_NV 0x20A7
-#endif
-
-#ifndef WGL_NV_render_texture_rectangle
-#define WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV 0x20A0
-#define WGL_BIND_TO_TEXTURE_RECTANGLE_RGBA_NV 0x20A1
-#define WGL_TEXTURE_RECTANGLE_NV 0x20A2
-#endif
-
-#ifndef WGL_ATI_pixel_format_float
-#define WGL_TYPE_RGBA_FLOAT_ATI 0x21A0
-#endif
-
-#ifndef WGL_NV_float_buffer
-#define WGL_FLOAT_COMPONENTS_NV 0x20B0
-#define WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_R_NV 0x20B1
-#define WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RG_NV 0x20B2
-#define WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGB_NV 0x20B3
-#define WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGBA_NV 0x20B4
-#define WGL_TEXTURE_FLOAT_R_NV 0x20B5
-#define WGL_TEXTURE_FLOAT_RG_NV 0x20B6
-#define WGL_TEXTURE_FLOAT_RGB_NV 0x20B7
-#define WGL_TEXTURE_FLOAT_RGBA_NV 0x20B8
-#endif
-
-#ifndef WGL_3DL_stereo_control
-#define WGL_STEREO_EMITTER_ENABLE_3DL 0x2055
-#define WGL_STEREO_EMITTER_DISABLE_3DL 0x2056
-#define WGL_STEREO_POLARITY_NORMAL_3DL 0x2057
-#define WGL_STEREO_POLARITY_INVERT_3DL 0x2058
-#endif
-
-#ifndef WGL_EXT_pixel_format_packed_float
-#define WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT 0x20A8
-#endif
-
-#ifndef WGL_EXT_framebuffer_sRGB
-#define WGL_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x20A9
-#endif
-
-#ifndef WGL_NV_present_video
-#define WGL_NUM_VIDEO_SLOTS_NV 0x20F0
-#endif
-
-#ifndef WGL_NV_video_out
-#define WGL_BIND_TO_VIDEO_RGB_NV 0x20C0
-#define WGL_BIND_TO_VIDEO_RGBA_NV 0x20C1
-#define WGL_BIND_TO_VIDEO_RGB_AND_DEPTH_NV 0x20C2
-#define WGL_VIDEO_OUT_COLOR_NV 0x20C3
-#define WGL_VIDEO_OUT_ALPHA_NV 0x20C4
-#define WGL_VIDEO_OUT_DEPTH_NV 0x20C5
-#define WGL_VIDEO_OUT_COLOR_AND_ALPHA_NV 0x20C6
-#define WGL_VIDEO_OUT_COLOR_AND_DEPTH_NV 0x20C7
-#define WGL_VIDEO_OUT_FRAME 0x20C8
-#define WGL_VIDEO_OUT_FIELD_1 0x20C9
-#define WGL_VIDEO_OUT_FIELD_2 0x20CA
-#define WGL_VIDEO_OUT_STACKED_FIELDS_1_2 0x20CB
-#define WGL_VIDEO_OUT_STACKED_FIELDS_2_1 0x20CC
-#endif
-
-#ifndef WGL_NV_swap_group
-#endif
-
-#ifndef WGL_NV_gpu_affinity
-#define WGL_ERROR_INCOMPATIBLE_AFFINITY_MASKS_NV 0x20D0
-#define WGL_ERROR_MISSING_AFFINITY_MASK_NV 0x20D1
-#endif
-
-#ifndef WGL_AMD_gpu_association
-#define WGL_GPU_VENDOR_AMD 0x1F00
-#define WGL_GPU_RENDERER_STRING_AMD 0x1F01
-#define WGL_GPU_OPENGL_VERSION_STRING_AMD 0x1F02
-#define WGL_GPU_FASTEST_TARGET_GPUS_AMD 0x21A2
-#define WGL_GPU_RAM_AMD 0x21A3
-#define WGL_GPU_CLOCK_AMD 0x21A4
-#define WGL_GPU_NUM_PIPES_AMD 0x21A5
-#define WGL_GPU_NUM_SIMD_AMD 0x21A6
-#define WGL_GPU_NUM_RB_AMD 0x21A7
-#define WGL_GPU_NUM_SPI_AMD 0x21A8
-#endif
-
-#ifndef WGL_NV_video_capture
-#define WGL_UNIQUE_ID_NV 0x20CE
-#define WGL_NUM_VIDEO_CAPTURE_SLOTS_NV 0x20CF
-#endif
-
-#ifndef WGL_NV_copy_image
-#endif
-
-#ifndef WGL_NV_multisample_coverage
-#define WGL_COVERAGE_SAMPLES_NV 0x2042
-#define WGL_COLOR_SAMPLES_NV 0x20B9
-#endif
-
-#ifndef WGL_EXT_create_context_es2_profile
-#define WGL_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
-#endif
-
-
-/*************************************************************/
-
-#ifndef WGL_ARB_pbuffer
-DECLARE_HANDLE(HPBUFFERARB);
-#endif
-#ifndef WGL_EXT_pbuffer
-DECLARE_HANDLE(HPBUFFEREXT);
-#endif
-#ifndef WGL_NV_present_video
-DECLARE_HANDLE(HVIDEOOUTPUTDEVICENV);
-#endif
-#ifndef WGL_NV_video_output
-DECLARE_HANDLE(HPVIDEODEV);
-#endif
-#ifndef WGL_NV_gpu_affinity
-DECLARE_HANDLE(HPGPUNV);
-DECLARE_HANDLE(HGPUNV);
-
-typedef struct _GPU_DEVICE {
- DWORD cb;
- CHAR DeviceName[32];
- CHAR DeviceString[128];
- DWORD Flags;
- RECT rcVirtualScreen;
-} GPU_DEVICE, *PGPU_DEVICE;
-#endif
-#ifndef WGL_NV_video_capture
-DECLARE_HANDLE(HVIDEOINPUTDEVICENV);
-#endif
-
-#ifndef WGL_ARB_buffer_region
-#define WGL_ARB_buffer_region 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern HANDLE WINAPI wglCreateBufferRegionARB (HDC hDC, int iLayerPlane, UINT uType);
-extern VOID WINAPI wglDeleteBufferRegionARB (HANDLE hRegion);
-extern BOOL WINAPI wglSaveBufferRegionARB (HANDLE hRegion, int x, int y, int width, int height);
-extern BOOL WINAPI wglRestoreBufferRegionARB (HANDLE hRegion, int x, int y, int width, int height, int xSrc, int ySrc);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef HANDLE (WINAPI * PFNWGLCREATEBUFFERREGIONARBPROC) (HDC hDC, int iLayerPlane, UINT uType);
-typedef VOID (WINAPI * PFNWGLDELETEBUFFERREGIONARBPROC) (HANDLE hRegion);
-typedef BOOL (WINAPI * PFNWGLSAVEBUFFERREGIONARBPROC) (HANDLE hRegion, int x, int y, int width, int height);
-typedef BOOL (WINAPI * PFNWGLRESTOREBUFFERREGIONARBPROC) (HANDLE hRegion, int x, int y, int width, int height, int xSrc, int ySrc);
-#endif
-
-#ifndef WGL_ARB_multisample
-#define WGL_ARB_multisample 1
-#endif
-
-#ifndef WGL_ARB_extensions_string
-#define WGL_ARB_extensions_string 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern const char * WINAPI wglGetExtensionsStringARB (HDC hdc);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc);
-#endif
-
-#ifndef WGL_ARB_pixel_format
-#define WGL_ARB_pixel_format 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglGetPixelFormatAttribivARB (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
-extern BOOL WINAPI wglGetPixelFormatAttribfvARB (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues);
-extern BOOL WINAPI wglChoosePixelFormatARB (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
-typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBFVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues);
-typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
-#endif
-
-#ifndef WGL_ARB_make_current_read
-#define WGL_ARB_make_current_read 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglMakeContextCurrentARB (HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
-extern HDC WINAPI wglGetCurrentReadDCARB (void);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLMAKECONTEXTCURRENTARBPROC) (HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
-typedef HDC (WINAPI * PFNWGLGETCURRENTREADDCARBPROC) (void);
-#endif
-
-#ifndef WGL_ARB_pbuffer
-#define WGL_ARB_pbuffer 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern HPBUFFERARB WINAPI wglCreatePbufferARB (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
-extern HDC WINAPI wglGetPbufferDCARB (HPBUFFERARB hPbuffer);
-extern int WINAPI wglReleasePbufferDCARB (HPBUFFERARB hPbuffer, HDC hDC);
-extern BOOL WINAPI wglDestroyPbufferARB (HPBUFFERARB hPbuffer);
-extern BOOL WINAPI wglQueryPbufferARB (HPBUFFERARB hPbuffer, int iAttribute, int *piValue);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef HPBUFFERARB (WINAPI * PFNWGLCREATEPBUFFERARBPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
-typedef HDC (WINAPI * PFNWGLGETPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer);
-typedef int (WINAPI * PFNWGLRELEASEPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer, HDC hDC);
-typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFERARBPROC) (HPBUFFERARB hPbuffer);
-typedef BOOL (WINAPI * PFNWGLQUERYPBUFFERARBPROC) (HPBUFFERARB hPbuffer, int iAttribute, int *piValue);
-#endif
-
-#ifndef WGL_ARB_render_texture
-#define WGL_ARB_render_texture 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglBindTexImageARB (HPBUFFERARB hPbuffer, int iBuffer);
-extern BOOL WINAPI wglReleaseTexImageARB (HPBUFFERARB hPbuffer, int iBuffer);
-extern BOOL WINAPI wglSetPbufferAttribARB (HPBUFFERARB hPbuffer, const int *piAttribList);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLBINDTEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer);
-typedef BOOL (WINAPI * PFNWGLRELEASETEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer);
-typedef BOOL (WINAPI * PFNWGLSETPBUFFERATTRIBARBPROC) (HPBUFFERARB hPbuffer, const int *piAttribList);
-#endif
-
-#ifndef WGL_ARB_pixel_format_float
-#define WGL_ARB_pixel_format_float 1
-#endif
-
-#ifndef WGL_ARB_framebuffer_sRGB
-#define WGL_ARB_framebuffer_sRGB 1
-#endif
-
-#ifndef WGL_ARB_create_context
-#define WGL_ARB_create_context 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern HGLRC WINAPI wglCreateContextAttribsARB (HDC hDC, HGLRC hShareContext, const int *attribList);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC, HGLRC hShareContext, const int *attribList);
-#endif
-
-#ifndef WGL_ARB_create_context_profile
-#define WGL_ARB_create_context_profile 1
-#endif
-
-#ifndef WGL_ARB_create_context_robustness
-#define WGL_ARB_create_context_robustness 1
-#endif
-
-#ifndef WGL_EXT_display_color_table
-#define WGL_EXT_display_color_table 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern GLboolean WINAPI wglCreateDisplayColorTableEXT (GLushort id);
-extern GLboolean WINAPI wglLoadDisplayColorTableEXT (const GLushort *table, GLuint length);
-extern GLboolean WINAPI wglBindDisplayColorTableEXT (GLushort id);
-extern VOID WINAPI wglDestroyDisplayColorTableEXT (GLushort id);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef GLboolean (WINAPI * PFNWGLCREATEDISPLAYCOLORTABLEEXTPROC) (GLushort id);
-typedef GLboolean (WINAPI * PFNWGLLOADDISPLAYCOLORTABLEEXTPROC) (const GLushort *table, GLuint length);
-typedef GLboolean (WINAPI * PFNWGLBINDDISPLAYCOLORTABLEEXTPROC) (GLushort id);
-typedef VOID (WINAPI * PFNWGLDESTROYDISPLAYCOLORTABLEEXTPROC) (GLushort id);
-#endif
-
-#ifndef WGL_EXT_extensions_string
-#define WGL_EXT_extensions_string 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern const char * WINAPI wglGetExtensionsStringEXT (void);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGEXTPROC) (void);
-#endif
-
-#ifndef WGL_EXT_make_current_read
-#define WGL_EXT_make_current_read 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglMakeContextCurrentEXT (HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
-extern HDC WINAPI wglGetCurrentReadDCEXT (void);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLMAKECONTEXTCURRENTEXTPROC) (HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
-typedef HDC (WINAPI * PFNWGLGETCURRENTREADDCEXTPROC) (void);
-#endif
-
-#ifndef WGL_EXT_pbuffer
-#define WGL_EXT_pbuffer 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern HPBUFFEREXT WINAPI wglCreatePbufferEXT (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
-extern HDC WINAPI wglGetPbufferDCEXT (HPBUFFEREXT hPbuffer);
-extern int WINAPI wglReleasePbufferDCEXT (HPBUFFEREXT hPbuffer, HDC hDC);
-extern BOOL WINAPI wglDestroyPbufferEXT (HPBUFFEREXT hPbuffer);
-extern BOOL WINAPI wglQueryPbufferEXT (HPBUFFEREXT hPbuffer, int iAttribute, int *piValue);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef HPBUFFEREXT (WINAPI * PFNWGLCREATEPBUFFEREXTPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
-typedef HDC (WINAPI * PFNWGLGETPBUFFERDCEXTPROC) (HPBUFFEREXT hPbuffer);
-typedef int (WINAPI * PFNWGLRELEASEPBUFFERDCEXTPROC) (HPBUFFEREXT hPbuffer, HDC hDC);
-typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFEREXTPROC) (HPBUFFEREXT hPbuffer);
-typedef BOOL (WINAPI * PFNWGLQUERYPBUFFEREXTPROC) (HPBUFFEREXT hPbuffer, int iAttribute, int *piValue);
-#endif
-
-#ifndef WGL_EXT_pixel_format
-#define WGL_EXT_pixel_format 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglGetPixelFormatAttribivEXT (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, int *piValues);
-extern BOOL WINAPI wglGetPixelFormatAttribfvEXT (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, FLOAT *pfValues);
-extern BOOL WINAPI wglChoosePixelFormatEXT (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVEXTPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, int *piValues);
-typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBFVEXTPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, FLOAT *pfValues);
-typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATEXTPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
-#endif
-
-#ifndef WGL_EXT_swap_control
-#define WGL_EXT_swap_control 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglSwapIntervalEXT (int interval);
-extern int WINAPI wglGetSwapIntervalEXT (void);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLSWAPINTERVALEXTPROC) (int interval);
-typedef int (WINAPI * PFNWGLGETSWAPINTERVALEXTPROC) (void);
-#endif
-
-#ifndef WGL_EXT_depth_float
-#define WGL_EXT_depth_float 1
-#endif
-
-#ifndef WGL_NV_vertex_array_range
-#define WGL_NV_vertex_array_range 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern void* WINAPI wglAllocateMemoryNV (GLsizei size, GLfloat readfreq, GLfloat writefreq, GLfloat priority);
-extern void WINAPI wglFreeMemoryNV (void *pointer);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef void* (WINAPI * PFNWGLALLOCATEMEMORYNVPROC) (GLsizei size, GLfloat readfreq, GLfloat writefreq, GLfloat priority);
-typedef void (WINAPI * PFNWGLFREEMEMORYNVPROC) (void *pointer);
-#endif
-
-#ifndef WGL_3DFX_multisample
-#define WGL_3DFX_multisample 1
-#endif
-
-#ifndef WGL_EXT_multisample
-#define WGL_EXT_multisample 1
-#endif
-
-#ifndef WGL_OML_sync_control
-#define WGL_OML_sync_control 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglGetSyncValuesOML (HDC hdc, INT64 *ust, INT64 *msc, INT64 *sbc);
-extern BOOL WINAPI wglGetMscRateOML (HDC hdc, INT32 *numerator, INT32 *denominator);
-extern INT64 WINAPI wglSwapBuffersMscOML (HDC hdc, INT64 target_msc, INT64 divisor, INT64 remainder);
-extern INT64 WINAPI wglSwapLayerBuffersMscOML (HDC hdc, int fuPlanes, INT64 target_msc, INT64 divisor, INT64 remainder);
-extern BOOL WINAPI wglWaitForMscOML (HDC hdc, INT64 target_msc, INT64 divisor, INT64 remainder, INT64 *ust, INT64 *msc, INT64 *sbc);
-extern BOOL WINAPI wglWaitForSbcOML (HDC hdc, INT64 target_sbc, INT64 *ust, INT64 *msc, INT64 *sbc);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLGETSYNCVALUESOMLPROC) (HDC hdc, INT64 *ust, INT64 *msc, INT64 *sbc);
-typedef BOOL (WINAPI * PFNWGLGETMSCRATEOMLPROC) (HDC hdc, INT32 *numerator, INT32 *denominator);
-typedef INT64 (WINAPI * PFNWGLSWAPBUFFERSMSCOMLPROC) (HDC hdc, INT64 target_msc, INT64 divisor, INT64 remainder);
-typedef INT64 (WINAPI * PFNWGLSWAPLAYERBUFFERSMSCOMLPROC) (HDC hdc, int fuPlanes, INT64 target_msc, INT64 divisor, INT64 remainder);
-typedef BOOL (WINAPI * PFNWGLWAITFORMSCOMLPROC) (HDC hdc, INT64 target_msc, INT64 divisor, INT64 remainder, INT64 *ust, INT64 *msc, INT64 *sbc);
-typedef BOOL (WINAPI * PFNWGLWAITFORSBCOMLPROC) (HDC hdc, INT64 target_sbc, INT64 *ust, INT64 *msc, INT64 *sbc);
-#endif
-
-#ifndef WGL_I3D_digital_video_control
-#define WGL_I3D_digital_video_control 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglGetDigitalVideoParametersI3D (HDC hDC, int iAttribute, int *piValue);
-extern BOOL WINAPI wglSetDigitalVideoParametersI3D (HDC hDC, int iAttribute, const int *piValue);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLGETDIGITALVIDEOPARAMETERSI3DPROC) (HDC hDC, int iAttribute, int *piValue);
-typedef BOOL (WINAPI * PFNWGLSETDIGITALVIDEOPARAMETERSI3DPROC) (HDC hDC, int iAttribute, const int *piValue);
-#endif
-
-#ifndef WGL_I3D_gamma
-#define WGL_I3D_gamma 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglGetGammaTableParametersI3D (HDC hDC, int iAttribute, int *piValue);
-extern BOOL WINAPI wglSetGammaTableParametersI3D (HDC hDC, int iAttribute, const int *piValue);
-extern BOOL WINAPI wglGetGammaTableI3D (HDC hDC, int iEntries, USHORT *puRed, USHORT *puGreen, USHORT *puBlue);
-extern BOOL WINAPI wglSetGammaTableI3D (HDC hDC, int iEntries, const USHORT *puRed, const USHORT *puGreen, const USHORT *puBlue);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLGETGAMMATABLEPARAMETERSI3DPROC) (HDC hDC, int iAttribute, int *piValue);
-typedef BOOL (WINAPI * PFNWGLSETGAMMATABLEPARAMETERSI3DPROC) (HDC hDC, int iAttribute, const int *piValue);
-typedef BOOL (WINAPI * PFNWGLGETGAMMATABLEI3DPROC) (HDC hDC, int iEntries, USHORT *puRed, USHORT *puGreen, USHORT *puBlue);
-typedef BOOL (WINAPI * PFNWGLSETGAMMATABLEI3DPROC) (HDC hDC, int iEntries, const USHORT *puRed, const USHORT *puGreen, const USHORT *puBlue);
-#endif
-
-#ifndef WGL_I3D_genlock
-#define WGL_I3D_genlock 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglEnableGenlockI3D (HDC hDC);
-extern BOOL WINAPI wglDisableGenlockI3D (HDC hDC);
-extern BOOL WINAPI wglIsEnabledGenlockI3D (HDC hDC, BOOL *pFlag);
-extern BOOL WINAPI wglGenlockSourceI3D (HDC hDC, UINT uSource);
-extern BOOL WINAPI wglGetGenlockSourceI3D (HDC hDC, UINT *uSource);
-extern BOOL WINAPI wglGenlockSourceEdgeI3D (HDC hDC, UINT uEdge);
-extern BOOL WINAPI wglGetGenlockSourceEdgeI3D (HDC hDC, UINT *uEdge);
-extern BOOL WINAPI wglGenlockSampleRateI3D (HDC hDC, UINT uRate);
-extern BOOL WINAPI wglGetGenlockSampleRateI3D (HDC hDC, UINT *uRate);
-extern BOOL WINAPI wglGenlockSourceDelayI3D (HDC hDC, UINT uDelay);
-extern BOOL WINAPI wglGetGenlockSourceDelayI3D (HDC hDC, UINT *uDelay);
-extern BOOL WINAPI wglQueryGenlockMaxSourceDelayI3D (HDC hDC, UINT *uMaxLineDelay, UINT *uMaxPixelDelay);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLENABLEGENLOCKI3DPROC) (HDC hDC);
-typedef BOOL (WINAPI * PFNWGLDISABLEGENLOCKI3DPROC) (HDC hDC);
-typedef BOOL (WINAPI * PFNWGLISENABLEDGENLOCKI3DPROC) (HDC hDC, BOOL *pFlag);
-typedef BOOL (WINAPI * PFNWGLGENLOCKSOURCEI3DPROC) (HDC hDC, UINT uSource);
-typedef BOOL (WINAPI * PFNWGLGETGENLOCKSOURCEI3DPROC) (HDC hDC, UINT *uSource);
-typedef BOOL (WINAPI * PFNWGLGENLOCKSOURCEEDGEI3DPROC) (HDC hDC, UINT uEdge);
-typedef BOOL (WINAPI * PFNWGLGETGENLOCKSOURCEEDGEI3DPROC) (HDC hDC, UINT *uEdge);
-typedef BOOL (WINAPI * PFNWGLGENLOCKSAMPLERATEI3DPROC) (HDC hDC, UINT uRate);
-typedef BOOL (WINAPI * PFNWGLGETGENLOCKSAMPLERATEI3DPROC) (HDC hDC, UINT *uRate);
-typedef BOOL (WINAPI * PFNWGLGENLOCKSOURCEDELAYI3DPROC) (HDC hDC, UINT uDelay);
-typedef BOOL (WINAPI * PFNWGLGETGENLOCKSOURCEDELAYI3DPROC) (HDC hDC, UINT *uDelay);
-typedef BOOL (WINAPI * PFNWGLQUERYGENLOCKMAXSOURCEDELAYI3DPROC) (HDC hDC, UINT *uMaxLineDelay, UINT *uMaxPixelDelay);
-#endif
-
-#ifndef WGL_I3D_image_buffer
-#define WGL_I3D_image_buffer 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern LPVOID WINAPI wglCreateImageBufferI3D (HDC hDC, DWORD dwSize, UINT uFlags);
-extern BOOL WINAPI wglDestroyImageBufferI3D (HDC hDC, LPVOID pAddress);
-extern BOOL WINAPI wglAssociateImageBufferEventsI3D (HDC hDC, const HANDLE *pEvent, const LPVOID *pAddress, const DWORD *pSize, UINT count);
-extern BOOL WINAPI wglReleaseImageBufferEventsI3D (HDC hDC, const LPVOID *pAddress, UINT count);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef LPVOID (WINAPI * PFNWGLCREATEIMAGEBUFFERI3DPROC) (HDC hDC, DWORD dwSize, UINT uFlags);
-typedef BOOL (WINAPI * PFNWGLDESTROYIMAGEBUFFERI3DPROC) (HDC hDC, LPVOID pAddress);
-typedef BOOL (WINAPI * PFNWGLASSOCIATEIMAGEBUFFEREVENTSI3DPROC) (HDC hDC, const HANDLE *pEvent, const LPVOID *pAddress, const DWORD *pSize, UINT count);
-typedef BOOL (WINAPI * PFNWGLRELEASEIMAGEBUFFEREVENTSI3DPROC) (HDC hDC, const LPVOID *pAddress, UINT count);
-#endif
-
-#ifndef WGL_I3D_swap_frame_lock
-#define WGL_I3D_swap_frame_lock 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglEnableFrameLockI3D (void);
-extern BOOL WINAPI wglDisableFrameLockI3D (void);
-extern BOOL WINAPI wglIsEnabledFrameLockI3D (BOOL *pFlag);
-extern BOOL WINAPI wglQueryFrameLockMasterI3D (BOOL *pFlag);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLENABLEFRAMELOCKI3DPROC) (void);
-typedef BOOL (WINAPI * PFNWGLDISABLEFRAMELOCKI3DPROC) (void);
-typedef BOOL (WINAPI * PFNWGLISENABLEDFRAMELOCKI3DPROC) (BOOL *pFlag);
-typedef BOOL (WINAPI * PFNWGLQUERYFRAMELOCKMASTERI3DPROC) (BOOL *pFlag);
-#endif
-
-#ifndef WGL_I3D_swap_frame_usage
-#define WGL_I3D_swap_frame_usage 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglGetFrameUsageI3D (float *pUsage);
-extern BOOL WINAPI wglBeginFrameTrackingI3D (void);
-extern BOOL WINAPI wglEndFrameTrackingI3D (void);
-extern BOOL WINAPI wglQueryFrameTrackingI3D (DWORD *pFrameCount, DWORD *pMissedFrames, float *pLastMissedUsage);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLGETFRAMEUSAGEI3DPROC) (float *pUsage);
-typedef BOOL (WINAPI * PFNWGLBEGINFRAMETRACKINGI3DPROC) (void);
-typedef BOOL (WINAPI * PFNWGLENDFRAMETRACKINGI3DPROC) (void);
-typedef BOOL (WINAPI * PFNWGLQUERYFRAMETRACKINGI3DPROC) (DWORD *pFrameCount, DWORD *pMissedFrames, float *pLastMissedUsage);
-#endif
-
-#ifndef WGL_ATI_pixel_format_float
-#define WGL_ATI_pixel_format_float 1
-#endif
-
-#ifndef WGL_NV_float_buffer
-#define WGL_NV_float_buffer 1
-#endif
-
-#ifndef WGL_3DL_stereo_control
-#define WGL_3DL_stereo_control 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglSetStereoEmitterState3DL (HDC hDC, UINT uState);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLSETSTEREOEMITTERSTATE3DLPROC) (HDC hDC, UINT uState);
-#endif
-
-#ifndef WGL_EXT_pixel_format_packed_float
-#define WGL_EXT_pixel_format_packed_float 1
-#endif
-
-#ifndef WGL_EXT_framebuffer_sRGB
-#define WGL_EXT_framebuffer_sRGB 1
-#endif
-
-#ifndef WGL_NV_present_video
-#define WGL_NV_present_video 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern int WINAPI wglEnumerateVideoDevicesNV (HDC hDC, HVIDEOOUTPUTDEVICENV *phDeviceList);
-extern BOOL WINAPI wglBindVideoDeviceNV (HDC hDC, unsigned int uVideoSlot, HVIDEOOUTPUTDEVICENV hVideoDevice, const int *piAttribList);
-extern BOOL WINAPI wglQueryCurrentContextNV (int iAttribute, int *piValue);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef int (WINAPI * PFNWGLENUMERATEVIDEODEVICESNVPROC) (HDC hDC, HVIDEOOUTPUTDEVICENV *phDeviceList);
-typedef BOOL (WINAPI * PFNWGLBINDVIDEODEVICENVPROC) (HDC hDC, unsigned int uVideoSlot, HVIDEOOUTPUTDEVICENV hVideoDevice, const int *piAttribList);
-typedef BOOL (WINAPI * PFNWGLQUERYCURRENTCONTEXTNVPROC) (int iAttribute, int *piValue);
-#endif
-
-#ifndef WGL_NV_video_output
-#define WGL_NV_video_output 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglGetVideoDeviceNV (HDC hDC, int numDevices, HPVIDEODEV *hVideoDevice);
-extern BOOL WINAPI wglReleaseVideoDeviceNV (HPVIDEODEV hVideoDevice);
-extern BOOL WINAPI wglBindVideoImageNV (HPVIDEODEV hVideoDevice, HPBUFFERARB hPbuffer, int iVideoBuffer);
-extern BOOL WINAPI wglReleaseVideoImageNV (HPBUFFERARB hPbuffer, int iVideoBuffer);
-extern BOOL WINAPI wglSendPbufferToVideoNV (HPBUFFERARB hPbuffer, int iBufferType, unsigned long *pulCounterPbuffer, BOOL bBlock);
-extern BOOL WINAPI wglGetVideoInfoNV (HPVIDEODEV hpVideoDevice, unsigned long *pulCounterOutputPbuffer, unsigned long *pulCounterOutputVideo);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLGETVIDEODEVICENVPROC) (HDC hDC, int numDevices, HPVIDEODEV *hVideoDevice);
-typedef BOOL (WINAPI * PFNWGLRELEASEVIDEODEVICENVPROC) (HPVIDEODEV hVideoDevice);
-typedef BOOL (WINAPI * PFNWGLBINDVIDEOIMAGENVPROC) (HPVIDEODEV hVideoDevice, HPBUFFERARB hPbuffer, int iVideoBuffer);
-typedef BOOL (WINAPI * PFNWGLRELEASEVIDEOIMAGENVPROC) (HPBUFFERARB hPbuffer, int iVideoBuffer);
-typedef BOOL (WINAPI * PFNWGLSENDPBUFFERTOVIDEONVPROC) (HPBUFFERARB hPbuffer, int iBufferType, unsigned long *pulCounterPbuffer, BOOL bBlock);
-typedef BOOL (WINAPI * PFNWGLGETVIDEOINFONVPROC) (HPVIDEODEV hpVideoDevice, unsigned long *pulCounterOutputPbuffer, unsigned long *pulCounterOutputVideo);
-#endif
-
-#ifndef WGL_NV_swap_group
-#define WGL_NV_swap_group 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglJoinSwapGroupNV (HDC hDC, GLuint group);
-extern BOOL WINAPI wglBindSwapBarrierNV (GLuint group, GLuint barrier);
-extern BOOL WINAPI wglQuerySwapGroupNV (HDC hDC, GLuint *group, GLuint *barrier);
-extern BOOL WINAPI wglQueryMaxSwapGroupsNV (HDC hDC, GLuint *maxGroups, GLuint *maxBarriers);
-extern BOOL WINAPI wglQueryFrameCountNV (HDC hDC, GLuint *count);
-extern BOOL WINAPI wglResetFrameCountNV (HDC hDC);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLJOINSWAPGROUPNVPROC) (HDC hDC, GLuint group);
-typedef BOOL (WINAPI * PFNWGLBINDSWAPBARRIERNVPROC) (GLuint group, GLuint barrier);
-typedef BOOL (WINAPI * PFNWGLQUERYSWAPGROUPNVPROC) (HDC hDC, GLuint *group, GLuint *barrier);
-typedef BOOL (WINAPI * PFNWGLQUERYMAXSWAPGROUPSNVPROC) (HDC hDC, GLuint *maxGroups, GLuint *maxBarriers);
-typedef BOOL (WINAPI * PFNWGLQUERYFRAMECOUNTNVPROC) (HDC hDC, GLuint *count);
-typedef BOOL (WINAPI * PFNWGLRESETFRAMECOUNTNVPROC) (HDC hDC);
-#endif
-
-#ifndef WGL_NV_gpu_affinity
-#define WGL_NV_gpu_affinity 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglEnumGpusNV (UINT iGpuIndex, HGPUNV *phGpu);
-extern BOOL WINAPI wglEnumGpuDevicesNV (HGPUNV hGpu, UINT iDeviceIndex, PGPU_DEVICE lpGpuDevice);
-extern HDC WINAPI wglCreateAffinityDCNV (const HGPUNV *phGpuList);
-extern BOOL WINAPI wglEnumGpusFromAffinityDCNV (HDC hAffinityDC, UINT iGpuIndex, HGPUNV *hGpu);
-extern BOOL WINAPI wglDeleteDCNV (HDC hdc);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLENUMGPUSNVPROC) (UINT iGpuIndex, HGPUNV *phGpu);
-typedef BOOL (WINAPI * PFNWGLENUMGPUDEVICESNVPROC) (HGPUNV hGpu, UINT iDeviceIndex, PGPU_DEVICE lpGpuDevice);
-typedef HDC (WINAPI * PFNWGLCREATEAFFINITYDCNVPROC) (const HGPUNV *phGpuList);
-typedef BOOL (WINAPI * PFNWGLENUMGPUSFROMAFFINITYDCNVPROC) (HDC hAffinityDC, UINT iGpuIndex, HGPUNV *hGpu);
-typedef BOOL (WINAPI * PFNWGLDELETEDCNVPROC) (HDC hdc);
-#endif
-
-#ifndef WGL_AMD_gpu_association
-#define WGL_AMD_gpu_association 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern UINT WINAPI wglGetGPUIDsAMD (UINT maxCount, UINT *ids);
-extern INT WINAPI wglGetGPUInfoAMD (UINT id, int property, GLenum dataType, UINT size, void *data);
-extern UINT WINAPI wglGetContextGPUIDAMD (HGLRC hglrc);
-extern HGLRC WINAPI wglCreateAssociatedContextAMD (UINT id);
-extern HGLRC WINAPI wglCreateAssociatedContextAttribsAMD (UINT id, HGLRC hShareContext, const int *attribList);
-extern BOOL WINAPI wglDeleteAssociatedContextAMD (HGLRC hglrc);
-extern BOOL WINAPI wglMakeAssociatedContextCurrentAMD (HGLRC hglrc);
-extern HGLRC WINAPI wglGetCurrentAssociatedContextAMD (void);
-extern VOID WINAPI wglBlitContextFramebufferAMD (HGLRC dstCtx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef UINT (WINAPI * PFNWGLGETGPUIDSAMDPROC) (UINT maxCount, UINT *ids);
-typedef INT (WINAPI * PFNWGLGETGPUINFOAMDPROC) (UINT id, int property, GLenum dataType, UINT size, void *data);
-typedef UINT (WINAPI * PFNWGLGETCONTEXTGPUIDAMDPROC) (HGLRC hglrc);
-typedef HGLRC (WINAPI * PFNWGLCREATEASSOCIATEDCONTEXTAMDPROC) (UINT id);
-typedef HGLRC (WINAPI * PFNWGLCREATEASSOCIATEDCONTEXTATTRIBSAMDPROC) (UINT id, HGLRC hShareContext, const int *attribList);
-typedef BOOL (WINAPI * PFNWGLDELETEASSOCIATEDCONTEXTAMDPROC) (HGLRC hglrc);
-typedef BOOL (WINAPI * PFNWGLMAKEASSOCIATEDCONTEXTCURRENTAMDPROC) (HGLRC hglrc);
-typedef HGLRC (WINAPI * PFNWGLGETCURRENTASSOCIATEDCONTEXTAMDPROC) (void);
-typedef VOID (WINAPI * PFNWGLBLITCONTEXTFRAMEBUFFERAMDPROC) (HGLRC dstCtx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
-#endif
-
-#ifndef WGL_NV_video_capture
-#define WGL_NV_video_capture 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglBindVideoCaptureDeviceNV (UINT uVideoSlot, HVIDEOINPUTDEVICENV hDevice);
-extern UINT WINAPI wglEnumerateVideoCaptureDevicesNV (HDC hDc, HVIDEOINPUTDEVICENV *phDeviceList);
-extern BOOL WINAPI wglLockVideoCaptureDeviceNV (HDC hDc, HVIDEOINPUTDEVICENV hDevice);
-extern BOOL WINAPI wglQueryVideoCaptureDeviceNV (HDC hDc, HVIDEOINPUTDEVICENV hDevice, int iAttribute, int *piValue);
-extern BOOL WINAPI wglReleaseVideoCaptureDeviceNV (HDC hDc, HVIDEOINPUTDEVICENV hDevice);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLBINDVIDEOCAPTUREDEVICENVPROC) (UINT uVideoSlot, HVIDEOINPUTDEVICENV hDevice);
-typedef UINT (WINAPI * PFNWGLENUMERATEVIDEOCAPTUREDEVICESNVPROC) (HDC hDc, HVIDEOINPUTDEVICENV *phDeviceList);
-typedef BOOL (WINAPI * PFNWGLLOCKVIDEOCAPTUREDEVICENVPROC) (HDC hDc, HVIDEOINPUTDEVICENV hDevice);
-typedef BOOL (WINAPI * PFNWGLQUERYVIDEOCAPTUREDEVICENVPROC) (HDC hDc, HVIDEOINPUTDEVICENV hDevice, int iAttribute, int *piValue);
-typedef BOOL (WINAPI * PFNWGLRELEASEVIDEOCAPTUREDEVICENVPROC) (HDC hDc, HVIDEOINPUTDEVICENV hDevice);
-#endif
-
-#ifndef WGL_NV_copy_image
-#define WGL_NV_copy_image 1
-#ifdef WGL_WGLEXT_PROTOTYPES
-extern BOOL WINAPI wglCopyImageSubDataNV (HGLRC hSrcRC, GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, HGLRC hDstRC, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
-#endif /* WGL_WGLEXT_PROTOTYPES */
-typedef BOOL (WINAPI * PFNWGLCOPYIMAGESUBDATANVPROC) (HGLRC hSrcRC, GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, HGLRC hDstRC, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
-#endif
-
-#ifndef WGL_NV_multisample_coverage
-#define WGL_NV_multisample_coverage 1
-#endif
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
+++ /dev/null
-
-Libpng 1.5.2 - March 31, 2011
-
-This is a public release of libpng, intended for use in production codes.
-
-Files available for download:
-
-Source files with LF line endings (for Unix/Linux) and with a
-"configure" script
-
- libpng-1.5.2.tar.xz (LZMA-compressed, recommended)
- libpng-1.5.2.tar.gz
- libpng-1.5.2.tar.bz2
-
-Source files with CRLF line endings (for Windows), without the
-"configure" script
-
- lpng152.7z (LZMA-compressed, recommended)
- lpng152.zip
-
-Other information:
-
- libpng-1.5.2-README.txt
- libpng-1.5.2-LICENSE.txt
-
-Changes since the last public release (1.5.2):
-
- More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
- check formal parameters names in function declarations (as well as
- definitions) to see if they match a name in the global namespace.
- Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
- old VisualC++ preprocessor.
- Turned on interlace handling in png_read_png().
- Fixed gcc pendantic warnings.
- Handle longjmp in Cygwin.
- Fixed png_get_current_row_number() in the interlaced case.
- Cleaned up ALPHA flags and transformations.
- Implemented expansion to 16 bits.
- Fixed mistake in the descriptions of user read_transform and write_transform
- function prototypes in the manual. The row_info struct is png_row_infop.
- Corrected png_get_current_row_number documentation
- Fixed the read/write row callback documentation.
- This documents the current behavior, where the callback is called after
- every row with information pertaining to the next row.
- Fixed scripts/makefile.vcwin32
- Updated contrib/pngsuite/README to add the word "modify".
- Define PNG_ALLOCATED and other attributes to blank when _MSC_VER<1300.
- ifdef out mask arrays in pngread.c when interlacing is not supported.
- Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
- and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
- from the makefiles.
- Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
- to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
- Don't include standard header files in png.h while building the symbol table,
- to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
-
-Send comments/corrections/commendations to png-mng-implement at lists.sf.net
-(subscription required; visit
-https://lists.sourceforge.net/lists/listinfo/png-mng-implement
-to subscribe) or to glennrp at users.sourceforge.net
-
-Glenn R-P
+++ /dev/null
-#if 0
-libpng_changes(){ /*
-CHANGES - changes for libpng
-
-Version 0.2
- added reader into png.h
- fixed small problems in stub file
-
-Version 0.3
- added pull reader
- split up pngwrite.c to several files
- added pnglib.txt
- added example.c
- cleaned up writer, adding a few new transformations
- fixed some bugs in writer
- interfaced with zlib 0.5
- added K&R support
- added check for 64 KB blocks for 16 bit machines
-
-Version 0.4
- cleaned up code and commented code
- simplified time handling into png_time
- created png_color_16 and png_color_8 to handle color needs
- cleaned up color type defines
- fixed various bugs
- made various names more consistent
- interfaced with zlib 0.71
- cleaned up zTXt reader and writer (using zlib's Reset functions)
- split transformations into pngrtran.c and pngwtran.c
-
-Version 0.5
- interfaced with zlib 0.8
- fixed many reading and writing bugs
- saved using 3 spaces instead of tabs
-
-Version 0.6
- added png_large_malloc() and png_large_free()
- added png_size_t
- cleaned up some compiler warnings
- added png_start_read_image()
-
-Version 0.7
- cleaned up lots of bugs
- finished dithering and other stuff
- added test program
- changed name from pnglib to libpng
-
-Version 0.71 [June, 1995]
- changed pngtest.png for zlib 0.93
- fixed error in libpng.txt and example.c
-
-Version 0.8
- cleaned up some bugs
- added png_set_filler()
- split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
- added #define's to remove unwanted code
- moved png_info_init() to png.c
- added old_size into png_realloc()
- added functions to manually set filtering and compression info
- changed compression parameters based on image type
- optimized filter selection code
- added version info
- changed external functions passing floats to doubles (k&r problems?)
- put all the configurable stuff in pngconf.h
- enabled png_set_shift to work with paletted images on read
- added png_read_update_info() - updates info structure with transformations
-
-Version 0.81 [August, 1995]
- incorporated Tim Wegner's medium model code (thanks, Tim)
-
-Version 0.82 [September, 1995]
- [unspecified changes]
-
-Version 0.85 [December, 1995]
- added more medium model code (almost everything's a far)
- added i/o, error, and memory callback functions
- fixed some bugs (16 bit, 4 bit interlaced, etc.)
- added first run progressive reader (barely tested)
-
-Version 0.86 [January, 1996]
- fixed bugs
- improved documentation
-
-Version 0.87 [January, 1996]
- fixed medium model bugs
- fixed other bugs introduced in 0.85 and 0.86
- added some minor documentation
-
-Version 0.88 [January, 1996]
- fixed progressive bugs
- replaced tabs with spaces
- cleaned up documentation
- added callbacks for read/write and warning/error functions
-
-Version 0.89 [July, 1996]
- Added new initialization API to make libpng work better with shared libs
- we now have png_create_read_struct(), png_create_write_struct(),
- png_create_info_struct(), png_destroy_read_struct(), and
- png_destroy_write_struct() instead of the separate calls to
- malloc and png_read_init(), png_info_init(), and png_write_init()
- Changed warning/error callback functions to fix bug - this means you
- should use the new initialization API if you were using the old
- png_set_message_fn() calls, and that the old API no longer exists
- so that people are aware that they need to change their code
- Changed filter selection API to allow selection of multiple filters
- since it didn't work in previous versions of libpng anyways
- Optimized filter selection code
- Fixed png_set_background() to allow using an arbitrary RGB color for
- paletted images
- Fixed gamma and background correction for paletted images, so
- png_correct_palette is not needed unless you are correcting an
- external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
- in pngconf.h) - if nobody uses this, it may disappear in the future.
- Fixed bug with Borland 64K memory allocation (Alexander Lehmann)
- Fixed bug in interlace handling (Smarasderagd, I think)
- Added more error checking for writing and image to reduce invalid files
- Separated read and write functions so that they won't both be linked
- into a binary when only reading or writing functionality is used
- New pngtest image also has interlacing and zTXt
- Updated documentation to reflect new API
-
-Version 0.90 [January, 1997]
- Made CRC errors/warnings on critical and ancillary chunks configurable
- libpng will use the zlib CRC routines by (compile-time) default
- Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
- Added external C++ wrapper statements to png.h (Gilles Dauphin)
- Allow PNG file to be read when some or all of file signature has already
- been read from the beginning of the stream. ****This affects the size
- of info_struct and invalidates all programs that use a shared libpng****
- Fixed png_filler() declarations
- Fixed? background color conversions
- Fixed order of error function pointers to match documentation
- Current chunk name is now available in png_struct to reduce the number
- of nearly identical error messages (will simplify multi-lingual
- support when available)
- Try to get ready for unknown-chunk callback functions:
- - previously read critical chunks are flagged, so the chunk handling
- routines can determine if the chunk is in the right place
- - all chunk handling routines have the same prototypes, so we will
- be able to handle all chunks via a callback mechanism
- Try to fix Linux "setjmp" buffer size problems
- Removed png_large_malloc, png_large_free, and png_realloc functions.
-
-Version 0.95 [March, 1997]
- Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
- Fixed bug in PNG file signature compares when start != 0
- Changed parameter type of png_set_filler(...filler...) from png_byte
- to png_uint_32
- Added test for MACOS to ensure that both math.h and fp.h are not #included
- Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
- Added "packswap" transformation, which changes the endianness of
- packed-pixel bytes (Kevin Bracey)
- Added "strip_alpha" transformation, which removes the alpha channel of
- input images without using it (not necessarily a good idea)
- Added "swap_alpha" transformation, which puts the alpha channel in front
- of the color bytes instead of after
- Removed all implicit variable tests which assume NULL == 0 (I think)
- Changed several variables to "png_size_t" to show 16/32-bit limitations
- Added new pCAL chunk read/write support
- Added experimental filter selection weighting (Greg Roelofs)
- Removed old png_set_rgbx() and png_set_xrgb() functions that have been
- obsolete for about 2 years now (use png_set_filler() instead)
- Added macros to read 16- and 32-bit ints directly from buffer, to be
- used only on those systems that support it (namely PowerPC and 680x0)
- With some testing, this may become the default for MACOS/PPC systems.
- Only calculate CRC on data if we are going to use it
- Added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
- Added macros for simple libpng debugging output selectable at compile time
- Removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
- More description of info_struct in libpng.txt and png.h
- More instructions in example.c
- More chunk types tested in pngtest.c
- Renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
- png_set_<chunk>. We now have corresponding png_get_<chunk>
- functions in pngget.c to get information in info_ptr. This isolates
- the application from the internal organization of png_info_struct
- (good for shared library implementations).
-
-Version 0.96 [May, 1997]
- Fixed serious bug with < 8bpp images introduced in 0.95
- Fixed 256-color transparency bug (Greg Roelofs)
- Fixed up documentation (Greg Roelofs, Laszlo Nyul)
- Fixed "error" in pngconf.h for Linux setjmp() behaviour
- Fixed DOS medium model support (Tim Wegner)
- Fixed png_check_keyword() for case with error in static string text
- Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
- Added typecasts to quiet compiler errors
- Added more debugging info
-
-Version 0.97 [January, 1998]
- Removed PNG_USE_OWN_CRC capability
- Relocated png_set_crc_action from pngrutil.c to pngrtran.c
- Fixed typecasts of "new_key", etc. (Andreas Dilger)
- Added RFC 1152 [sic] date support
- Fixed bug in gamma handling of 4-bit grayscale
- Added 2-bit grayscale gamma handling (Glenn R-P)
- Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
- Minor corrections in libpng.txt
- Added simple sRGB support (Glenn R-P)
- Easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
- all configurable options can be selected from command-line instead
- of having to edit pngconf.h (Glenn R-P)
- Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
- Added more conditions for png_do_background, to avoid changing
- black pixels to background when a background is supplied and
- no pixels are transparent
- Repaired PNG_NO_STDIO behaviour
- Tested NODIV support and made it default behaviour (Greg Roelofs)
- Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
- Regularized version numbering scheme and bumped shared-library major
- version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs)
-
-Version 0.98 [January, 1998]
- Cleaned up some typos in libpng.txt and in code documentation
- Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
- Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
- Changed recommendation about file_gamma for PC images to .51 from .45,
- in example.c and libpng.txt, added comments to distinguish between
- screen_gamma, viewing_gamma, and display_gamma.
- Changed all references to RFC1152 to read RFC1123 and changed the
- PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
- Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
- Changed srgb_intent from png_byte to int to avoid compiler bugs
-
-Version 0.99 [January 30, 1998]
- Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
- Fixed a longstanding "packswap" bug in pngtrans.c
- Fixed some inconsistencies in pngconf.h that prevented compiling with
- PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
- Fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
- Changed recommendation about file_gamma for PC images to .50 from .51 in
- example.c and libpng.txt, and changed file_gamma for sRGB images to .45
- Added a number of functions to access information from the png structure
- png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
- Added TARGET_MACOS similar to zlib-1.0.8
- Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
- Added type casting to all png_malloc() function calls
-
-Version 0.99a [January 31, 1998]
- Added type casts and parentheses to all returns that return a value.(Tim W.)
-
-Version 0.99b [February 4, 1998]
- Added type cast png_uint_32 on malloc function calls where needed.
- Changed type of num_hist from png_uint_32 to int (same as num_palette).
- Added checks for rowbytes overflow, in case png_size_t is less than 32 bits.
- Renamed makefile.elf to makefile.lnx.
-
-Version 0.99c [February 7, 1998]
- More type casting. Removed erroneous overflow test in pngmem.c.
- Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.
- Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5.
-
-Version 0.99d [February 11, 1998]
- Renamed "far_to_near()" "png_far_to_near()"
- Revised libpng.3
- Version 99c "buffered" operations didn't work as intended. Replaced them
- with png_memcpy_check() and png_memset_check().
- Added many "if (png_ptr == NULL) return" to quell compiler warnings about
- unused png_ptr, mostly in pngget.c and pngset.c.
- Check for overlength tRNS chunk present when indexed-color PLTE is read.
- Cleaned up spelling errors in libpng.3/libpng.txt
- Corrected a problem with png_get_tRNS() which returned undefined trans array
-
-Version 0.99e [February 28, 1998]
- Corrected png_get_tRNS() again.
- Add parentheses for easier reading of pngget.c, fixed "||" should be "&&".
- Touched up example.c to make more of it compileable, although the entire
- file still can't be compiled (Willem van Schaik)
- Fixed a bug in png_do_shift() (Bryan Tsai)
- Added a space in png.h prototype for png_write_chunk_start()
- Replaced pngtest.png with one created with zlib 1.1.1
- Changed pngtest to report PASS even when file size is different (Jean-loup G.)
- Corrected some logic errors in png_do_invert_alpha() (Chris Patterson)
-
-Version 0.99f [March 5, 1998]
- Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey)
- Moved makefiles into a "scripts" directory, and added INSTALL instruction file
- Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok)
- Added pointers to "note on libpng versions" in makefile.lnx and README
- Added row callback feature when reading and writing nonprogressive rows
- and added a test of this feature in pngtest.c
- Added user transform callbacks, with test of the feature in pngtest.c
-
-Version 0.99g [March 6, 1998, morning]
- Minor changes to pngtest.c to suppress compiler warnings.
- Removed "beta" language from documentation.
-
-Version 0.99h [March 6, 1998, evening]
- Minor changes to previous minor changes to pngtest.c
- Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED
- and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro
- Added user transform capability
-
-Version 1.00 [March 7, 1998]
- Changed several typedefs in pngrutil.c
- Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)
- Replaced "while(1)" with "for(;;)"
- Added PNGARG() to prototypes in pngtest.c and removed some prototypes
- Updated some of the makefiles (Tom Lane)
- Changed some typedefs (s_start, etc.) in pngrutil.c
- Fixed dimensions of "short_months" array in pngwrite.c
- Replaced ansi2knr.c with the one from jpeg-v6
-
-Version 1.0.0 [March 8, 1998]
- Changed name from 1.00 to 1.0.0 (Adam Costello)
- Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)
-
-Version 1.0.0a [March 9, 1998]
- Fixed three bugs in pngrtran.c to make gamma+background handling consistent
- (Greg Roelofs)
- Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz
- for major, minor, and bugfix releases. This is 10001. (Adam Costello,
- Tom Lane)
- Make months range from 1-12 in png_convert_to_rfc1123
-
-Version 1.0.0b [March 13, 1998]
- Quieted compiler complaints about two empty "for" loops in pngrutil.c
- Minor changes to makefile.s2x
- Removed #ifdef/#endif around a png_free() in pngread.c
-
-Version 1.0.1 [March 14, 1998]
- Changed makefile.s2x to reduce security risk of using a relative pathname
- Fixed some typos in the documentation (Greg).
- Fixed a problem with value of "channels" returned by png_read_update_info()
-
-Version 1.0.1a [April 21, 1998]
- Optimized Paeth calculations by replacing abs() function calls with intrinsics
- plus other loop optimizations. Improves avg decoding speed by about 20%.
- Commented out i386istic "align" compiler flags in makefile.lnx.
- Reduced the default warning level in some makefiles, to make them consistent.
- Removed references to IJG and JPEG in the ansi2knr.c copyright statement.
- Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.
- Added grayscale and 16-bit capability to png_do_read_filler().
- Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes
- too large when writing an image with bit_depth < 8 (Bob Dellaca).
- Corrected some bugs in the experimental weighted filtering heuristics.
- Moved a misplaced pngrutil code block that truncates tRNS if it has more
- than num_palette entries -- test was done before num_palette was defined.
- Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
- Changed compiler flags in makefile.wat for better optimization
- (Pawel Mrochen).
-
-Version 1.0.1b [May 2, 1998]
- Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
- Relocated the png_composite macros from pngrtran.c to png.h (Greg).
- Added makefile.sco (contributed by Mike Hopkirk).
- Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
- Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
- More work on the Paeth-filtering, achieving imperceptible speedup
- (A Kleinert).
- More work on loop optimization which may help when compiled with C++
- compilers.
- Added warnings when people try to use transforms they've defined out.
- Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
- Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
-
-Version 1.0.1c [May 11, 1998]
- Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
- filler bytes should have been 0xff instead of 0xf.
- Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
- Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
- out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
- Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,
- for consistency, in pngconf.h
- Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier
- to remove unwanted capabilities via the compile line
- Made some corrections to grammar (which, it's) in documentation (Greg).
- Corrected example.c, use of row_pointers in png_write_image().
-
-Version 1.0.1d [May 24, 1998]
- Corrected several statements that used side effects illegally in pngrutil.c
- and pngtrans.c, that were introduced in version 1.0.1b
- Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
- More corrections to example.c, use of row_pointers in png_write_image()
- and png_read_rows().
- Added pngdll.mak and pngdef.pas to scripts directory, contributed by
- Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
- Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
- Changed several loops from count-down to count-up, for consistency.
-
-Version 1.0.1e [June 6, 1998]
- Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
- added warnings when people try to set png_read_fn and png_write_fn in
- the same structure.
- Added a test such that png_do_gamma will be done when num_trans==0
- for truecolor images that have defined a background. This corrects an
- error that was introduced in libpng-0.90 that can cause gamma processing
- to be skipped.
- Added tests in png.h to include "trans" and "trans_values" in structures
- when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined.
- Add png_free(png_ptr->time_buffer) in png_destroy_read_struct()
- Moved png_convert_to_rfc_1123() from pngwrite.c to png.c
- Added capability for user-provided malloc_fn() and free_fn() functions,
- and revised pngtest.c to demonstrate their use, replacing the
- PNGTEST_DEBUG_MEM feature.
- Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
-
-Version 1.0.2 [June 14, 1998]
- Fixed two bugs in makefile.bor .
-
-Version 1.0.2a [December 30, 1998]
- Replaced and extended code that was removed from png_set_filler() in 1.0.1a.
- Fixed a bug in png_do_filler() that made it fail to write filler bytes in
- the left-most pixel of each row (Kevin Bracey).
- Changed "static pngcharp tIME_string" to "static char tIME_string[30]"
- in pngtest.c (Duncan Simpson).
- Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk
- even when no tIME chunk was present in the source file.
- Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit.
- Fixed a problem in png_read_push_finish_row(), which would not skip some
- passes that it should skip, for images that are less than 3 pixels high.
- Interchanged the order of calls to png_do_swap() and png_do_shift()
- in pngwtran.c (John Cromer).
- Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h .
- Changed "bad adaptive filter type" from error to warning in pngrutil.c .
- Fixed a documentation error about default filtering with 8-bit indexed-color.
- Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO
- (L. Peter Deutsch).
- Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.
- Added png_get_copyright() and png_get_header_version() functions.
- Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c
- Added information about debugging in libpng.txt and libpng.3 .
- Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and
- makefile.sco.
- Removed lines after Dynamic Dependencies" in makefile.aco .
- Revised makefile.dec to make a shared library (Jeremie Petit).
- Removed trailing blanks from all files.
-
-Version 1.0.2a [January 6, 1999]
- Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h
- Added "if" tests to silence complaints about unused png_ptr in png.h and png.c
- Changed "check_if_png" function in example.c to return true (nonzero) if PNG.
- Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()
- which is obsolete.
-
-Version 1.0.3 [January 14, 1999]
- Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)
- Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.
-
-Version 1.0.3a [August 12, 1999]
- Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
- if an attempt is made to read an interlaced image when it's not supported.
- Added check if png_ptr->trans is defined before freeing it in pngread.c
- Modified the Y2K statement to include versions back to version 0.71
- Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c
- Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)
- Replaced leading blanks with tab characters in makefile.hux
- Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.
- Changed (float)red and (float)green to (double)red, (double)green
- in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.
- Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).
- Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).
- Updated documentation to refer to the PNG-1.2 specification.
- Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c
- in makefile.knr, INSTALL, and README (L. Peter Deutsch)
- Fixed bugs in calculation of the length of rowbytes when adding alpha
- channels to 16-bit images, in pngrtran.c (Chris Nokleberg)
- Added function png_set_user_transform_info() to store user_transform_ptr,
- user_depth, and user_channels into the png_struct, and a function
- png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)
- Added function png_set_empty_plte_permitted() to make libpng useable
- in MNG applications.
- Corrected the typedef for png_free_ptr in png.h (Jesse Jones).
- Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
- consistent with PNG-1.2, and allow variance of 500 before complaining.
- Added assembler code contributed by Intel in file pngvcrd.c and modified
- makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation,
- Gilles Vollant)
- Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
- Added some aliases for png_set_expand() in pngrtran.c, namely
- png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
- (Greg Roelofs, in "PNG: The Definitive Guide").
- Added makefile.beo for BEOS on X86, contributed by Sander Stok.
-
-Version 1.0.3b [August 26, 1999]
- Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
- Changed leading blanks to tabs in all makefiles.
- Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
- Made alternate versions of png_set_expand() in pngrtran.c, namely
- png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
- (Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases.
- Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
- Revised calculation of num_blocks in pngmem.c to avoid a potentially
- negative shift distance, whose results are undefined in the C language.
- Added a check in pngset.c to prevent writing multiple tIME chunks.
- Added a check in pngwrite.c to detect invalid small window_bits sizes.
-
-Version 1.0.3d [September 4, 1999]
- Fixed type casting of igamma in pngrutil.c
- Added new png_expand functions to scripts/pngdef.pas and pngos2.def
- Added a demo read_user_transform_fn that examines the row filters in pngtest.c
-
-Version 1.0.4 [September 24, 1999]
- Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
- Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
- Made several minor corrections to pngtest.c
- Renamed the makefiles with longer but more user friendly extensions.
- Copied the PNG copyright and license to a separate LICENSE file.
- Revised documentation, png.h, and example.c to remove reference to
- "viewing_gamma" which no longer appears in the PNG specification.
- Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
- Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
- Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
- assembler code) and makefile.vcwin32 (doesn't).
- Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
- Added a copy of pngnow.png to the distribution.
-
-Version 1.0.4a [September 25, 1999]
- Increase max_pixel_depth in pngrutil.c if a user transform needs it.
- Changed several division operations to right-shifts in pngvcrd.c
-
-Version 1.0.4b [September 30, 1999]
- Added parentheses in line 3732 of pngvcrd.c
- Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
-
-Version 1.0.4c [October 1, 1999]
- Added a "png_check_version" function in png.c and pngtest.c that will generate
- a helpful compiler error if an old png.h is found in the search path.
- Changed type of png_user_transform_depth|channels from int to png_byte.
-
-Version 1.0.4d [October 6, 1999]
- Changed 0.45 to 0.45455 in png_set_sRGB()
- Removed unused PLTE entries from pngnow.png
- Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.
-
-Version 1.0.4e [October 10, 1999]
- Fixed sign error in pngvcrd.c (Greg Roelofs)
- Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)
-
-Version 1.0.4f [October 15, 1999]
- Surrounded example.c code with #if 0 .. #endif to prevent people from
- inadvertently trying to compile it.
- Changed png_get_header_version() from a function to a macro in png.h
- Added type casting mostly in pngrtran.c and pngwtran.c
- Removed some pointless "ptr = NULL" in pngmem.c
- Added a "contrib" directory containing the source code from Greg's book.
-
-Version 1.0.5 [October 15, 1999]
- Minor editing of the INSTALL and README files.
-
-Version 1.0.5a [October 23, 1999]
- Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
- Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
- Further optimization and bugfix of pngvcrd.c
- Revised pngset.c so that it does not allocate or free memory in the user's
- text_ptr structure. Instead, it makes its own copy.
- Created separate write_end_info_struct in pngtest.c for a more severe test.
- Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
-
-Version 1.0.5b [November 23, 1999]
- Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and
- PNG_FLAG_WROTE_tIME from flags to mode.
- Added png_write_info_before_PLTE() function.
- Fixed some typecasting in contrib/gregbook/*.c
- Updated scripts/makevms.com and added makevms.com to contrib/gregbook
- and contrib/pngminus (Martin Zinser)
-
-Version 1.0.5c [November 26, 1999]
- Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr.
- Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
- accommodate making DLL's: Moved usr_png_ver from global variable to function
- png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and
- eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays
- into pngtypes.h. Eliminated use of global png_pass arrays. Declared the
- png_CHNK and png_pass arrays to be "const". Made the global arrays
- available to applications (although none are used in libpng itself) when
- PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined.
- Removed some extraneous "-I" from contrib/pngminus/makefile.std
- Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.
- Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3
-
-Version 1.0.5d [November 29, 1999]
- Add type cast (png_const_charp) two places in png.c
- Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
- Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
- to applications a macro "PNG_USE_LOCAL_ARRAYS".
- comment out (with #ifdef) all the new declarations when
- PNG_USE_GLOBAL_ARRAYS is defined.
- Added PNG_EXPORT_VAR macro to accommodate making DLL's.
-
-Version 1.0.5e [November 30, 1999]
- Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
- structure; refactored the inflate/deflate support to make adding new chunks
- with trailing compressed parts easier in the future, and added new functions
- png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP,
- png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond).
- NOTE: Applications that write text chunks MUST define png_text->lang
- before calling png_set_text(). It must be set to NULL if you want to
- write tEXt or zTXt chunks. If you want your application to be able to
- run with older versions of libpng, use
-
- #ifdef PNG_iTXt_SUPPORTED
- png_text[i].lang = NULL;
- #endif
-
- Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned
- offsets (Eric S. Raymond).
- Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into
- PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED
- macros, leaving the separate macros also available.
- Removed comments on #endifs at the end of many short, non-nested #if-blocks.
-
-Version 1.0.5f [December 6, 1999]
- Changed makefile.solaris to issue a warning about potential problems when
- the ucb "ld" is in the path ahead of the ccs "ld".
- Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.
- Added sCAL chunk support (Eric S. Raymond).
-
-Version 1.0.5g [December 7, 1999]
- Fixed "png_free_spallettes" typo in png.h
- Added code to handle new chunks in pngpread.c
- Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block
- Added "translated_key" to png_text structure and png_write_iTXt().
- Added code in pngwrite.c to work around a newly discovered zlib bug.
-
-Version 1.0.5h [December 10, 1999]
- NOTE: regarding the note for version 1.0.5e, the following must also
- be included in your code:
- png_text[i].translated_key = NULL;
- Unknown chunk handling is now supported.
- Option to eliminate all floating point support was added. Some new
- fixed-point functions such as png_set_gAMA_fixed() were added.
- Expanded tabs and removed trailing blanks in source files.
-
-Version 1.0.5i [December 13, 1999]
- Added some type casts to silence compiler warnings.
- Renamed "png_free_spalette" to "png_free_spalettes" for consistency.
- Removed leading blanks from a #define in pngvcrd.c
- Added some parameters to the new png_set_keep_unknown_chunks() function.
- Added a test for up->location != 0 in the first instance of writing
- unknown chunks in pngwrite.c
- Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to
- prevent recursion.
- Added png_free_hIST() function.
- Various patches to fix bugs in the sCAL and integer cHRM processing,
- and to add some convenience macros for use with sCAL.
-
-Version 1.0.5j [December 21, 1999]
- Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
- around buggy compilers.
- Added new type "png_fixed_point" for integers that hold float*100000 values
- Restored backward compatibility of tEXt/zTXt chunk processing:
- Restored the first four members of png_text to the same order as v.1.0.5d.
- Added members "lang_key" and "itxt_length" to png_text struct. Set
- text_length=0 when "text" contains iTXt data. Use the "compression"
- member to distinguish among tEXt/zTXt/iTXt types. Added
- PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.
- The "Note" above, about backward incompatibility of libpng-1.0.5e, no
- longer applies.
- Fixed png_read|write_iTXt() to read|write parameters in the right order,
- and to write the iTXt chunk after IDAT if it appears in the end_ptr.
- Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
- Reversed the order of trying to write floating-point and fixed-point gAMA.
-
-Version 1.0.5k [December 27, 1999]
- Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
- Added png_handle_as_unknown() function (Glenn)
- Added png_free_chunk_list() function and chunk_list and num_chunk_list members
- of png_ptr.
- Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.
- Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings
- about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)
- Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
- Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
- Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
-
-Version 1.0.5l [January 1, 2000]
- Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
- for setting a callback function to handle unknown chunks and for
- retrieving the associated user pointer (Glenn).
-
-Version 1.0.5m [January 7, 2000]
- Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
-
-Version 1.0.5n [January 9, 2000]
- Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
- own memory for info_ptr->palette. This makes it safe for the calling
- application to free its copy of the palette any time after it calls
- png_set_PLTE().
-
-Version 1.0.5o [January 20, 2000]
- Cosmetic changes only (removed some trailing blanks and TABs)
-
-Version 1.0.5p [January 31, 2000]
- Renamed pngdll.mak to makefile.bd32
- Cosmetic changes in pngtest.c
-
-Version 1.0.5q [February 5, 2000]
- Relocated the makefile.solaris warning about PATH problems.
- Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
- Revised makefile.gcmmx
- Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
-
-Version 1.0.5r [February 7, 2000]
- Removed superfluous prototype for png_get_itxt from png.h
- Fixed a bug in pngrtran.c that improperly expanded the background color.
- Return *num_text=0 from png_get_text() when appropriate, and fix documentation
- of png_get_text() in libpng.txt/libpng.3.
-
-Version 1.0.5s [February 18, 2000]
- Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
- new error handler that's planned for the next libpng release, and changed
- example.c, pngtest.c, and contrib programs to use this macro.
- Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
- Fixed a bug in png_read_png() that caused it to fail to expand some images
- that it should have expanded.
- Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
- in pngget.c
- Changed the allocation of palette, history, and trans arrays back to
- the version 1.0.5 method (linking instead of copying) which restores
- backward compatibility with version 1.0.5. Added some remarks about
- that in example.c. Added "free_me" member to info_ptr and png_ptr
- and added png_free_data() function.
- Updated makefile.linux and makefile.gccmmx to make directories conditionally.
- Made cosmetic changes to pngasmrd.h
- Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
- Modified png_read_png() to allocate info_ptr->row_pointers only if it
- hasn't already been allocated.
-
-Version 1.0.5t [March 4, 2000]
- Changed png_jmp_env() migration aiding macro to png_jmpbuf().
- Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c
- Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when
- PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b
- Files in contrib/gregbook were revised to use png_jmpbuf() and to select
- a 24-bit visual if one is available, and to allow abbreviated options.
- Files in contrib/pngminus were revised to use the png_jmpbuf() macro.
- Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s
-
-Version 1.0.5u [March 5, 2000]
- Simplified the code that detects old png.h in png.c and pngtest.c
- Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)
- Increased precision of rgb_to_gray calculations from 8 to 15 bits and
- added png_set_rgb_to_gray_fixed() function.
- Added makefile.bc32 (32-bit Borland C++, C mode)
-
-Version 1.0.5v [March 11, 2000]
- Added some parentheses to the png_jmpbuf macro definition.
- Updated references to the zlib home page, which has moved to freesoftware.com.
- Corrected bugs in documentation regarding png_read_row() and png_write_row().
- Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt.
- Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
- revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
-
-Version 1.0.6 [March 20, 2000]
- Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c
- Added makefile.sggcc (SGI IRIX with gcc)
-
-Version 1.0.6d [April 7, 2000]
- Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
- Added data_length parameter to png_decompress_chunk() function
- Revised documentation to remove reference to abandoned png_free_chnk functions
- Fixed an error in png_rgb_to_gray_fixed()
- Revised example.c, usage of png_destroy_write_struct().
- Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
- Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c
- Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
-
-Version 1.0.6e [April 9, 2000]
- Added png_data_freer() function.
- In the code that checks for over-length tRNS chunks, added check of
- info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
- Minor revisions of libpng.txt/libpng.3.
- Check for existing data and free it if the free_me flag is set, in png_set_*()
- and png_handle_*().
- Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED
- is defined.
- Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c
- and mentioned the purposes of the two macros in libpng.txt/libpng.3.
-
-Version 1.0.6f [April 14, 2000]
- Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.
- Add checks in png_set_text() for NULL members of the input text structure.
- Revised libpng.txt/libpng.3.
- Removed superfluous prototype for png_set_iTXt from png.h
- Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
- Changed several png_errors about malformed ancillary chunks to png_warnings.
-
-Version 1.0.6g [April 24, 2000]
- Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
- Relocated paragraph about png_set_background() in libpng.3/libpng.txt
- and other revisions (Matthias Benckmann)
- Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
- png_ptr members to restore binary compatibility with libpng-1.0.5
- (breaks compatibility with libpng-1.0.6).
-
-Version 1.0.6h [April 24, 2000]
- Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds
- libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)
- This is a temporary change for test purposes.
-
-Version 1.0.6i [May 2, 2000]
- Rearranged some members at the end of png_info and png_struct, to put
- unknown_chunks_num and free_me within the original size of the png_structs
- and free_me, png_read_user_fn, and png_free_fn within the original png_info,
- because some old applications allocate the structs directly instead of
- using png_create_*().
- Added documentation of user memory functions in libpng.txt/libpng.3
- Modified png_read_png so that it will use user_allocated row_pointers
- if present, unless free_me directs that it be freed, and added description
- of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.
- Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version
- 1.00) members of png_struct and png_info, to regain binary compatibility
- when you define this macro. Capabilities lost in this event
- are user transforms (new in version 1.0.0),the user transform pointer
- (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,
- the high-level interface, and unknown chunks support (all new in 1.0.6).
- This was necessary because of old applications that allocate the structs
- directly as authors were instructed to do in libpng-0.88 and earlier,
- instead of using png_create_*().
- Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which
- can be used to detect codes that directly allocate the structs, and
- code to check these modes in png_read_init() and png_write_init() and
- generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED
- was not defined.
- Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
-
-Version 1.0.6j [May 3, 2000]
- Overloaded png_read_init() and png_write_init() with macros that convert
- calls to png_read_init_2() or png_write_init_2() that check the version
- and structure sizes.
-
-Version 1.0.7beta11 [May 7, 2000]
- Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
- which are no longer used.
- Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
- defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED
- is defined.
- Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory
- overrun when old applications fill the info_ptr->text structure directly.
- Added PNGAPI macro, and added it to the definitions of all exported functions.
- Relocated version macro definitions ahead of the includes of zlib.h and
- pngconf.h in png.h.
-
-Version 1.0.7beta12 [May 12, 2000]
- Revised pngset.c to avoid a problem with expanding the png_debug macro.
- Deleted some extraneous defines from pngconf.h
- Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
- Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
- Added png_access_version_number() function.
- Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
- Expanded libpng.3/libpng.txt information about png_data_freer().
-
-Version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
- Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
- warnings instead of errors, as pngrutil.c does.
- Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
- will actually write IDATs.
- Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
- Make png_free_data() ignore its final parameter except when freeing data
- that can have multiple instances (text, sPLT, unknowns).
- Fixed a new bug in png_set_rows().
- Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
- Added png_set_invalid() function.
- Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
-
-Version 1.0.7beta15 [May 30, 2000]
- Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
- fewer error messages.
- Rearranged checks for Z_OK to check the most likely path first in pngpread.c
- and pngwutil.c.
- Added checks in pngtest.c for png_create_*() returning NULL, and mentioned
- in libpng.txt/libpng.3 the need for applications to check this.
- Changed names of png_default_*() functions in pngtest to pngtest_*().
- Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32.
- Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c
- Set each pointer to NULL after freeing it in png_free_data().
- Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
- macro that conflicts with libpng's png_color_16.index. (Dimitri
- Papadapoulos)
- Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).
-
-Version 1.0.7beta16 [June 4, 2000]
- Revised the workaround of AIX string.h "index" bug.
- Added a check for overlength PLTE chunk in pngrutil.c.
- Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
- indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
- Added a warning in png_decompress_chunk() when it runs out of data, e.g.
- when it tries to read an erroneous PhotoShop iCCP chunk.
- Added PNG_USE_DLL macro.
- Revised the copyright/disclaimer/license notice.
- Added contrib/msvctest directory
-
-Version 1.0.7rc1 [June 9, 2000]
- Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
- Added contrib/visupng directory (Willem van Schaik)
-
-Version 1.0.7beta18 [June 23, 2000]
- Revised PNGAPI definition, and pngvcrd.c to work with __GCC__
- and do not redefine PNGAPI if it is passed in via a compiler directive.
- Revised visupng/PngFile.c to remove returns from within the Try block.
- Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
- Updated contrib/visupng/cexcept.h to version 1.0.0.
- Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
-
-Version 1.0.7rc2 [June 28, 2000]
- Updated license to include disclaimers required by UCITA.
- Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.
-
-Version 1.0.7 [July 1, 2000]
- Revised the definition of "trans_values" in libpng.3/libpng.txt
-
-Version 1.0.8beta1 [July 8, 2000]
- Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.
- Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and
- pngwutil.c.
- Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h.
- Removed unused "#include <assert.h>" from png.c
- Added WindowsCE support.
- Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment.
-
-Version 1.0.8beta2 [July 10, 2000]
- Added project files to the wince directory and made further revisions
- of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE.
-
-Version 1.0.8beta3 [July 11, 2000]
- Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS()
- for indexed-color input files to avoid potential double-freeing trans array
- under some unusual conditions; problem was introduced in version 1.0.6f.
- Further revisions to pngtest.c and files in the wince subdirectory.
-
-Version 1.0.8beta4 [July 14, 2000]
- Added the files pngbar.png and pngbar.jpg to the distribution.
- Added makefile.cygwin, and cygwin support in pngconf.h
- Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory)
-
-Version 1.0.8rc1 [July 16, 2000]
- Revised png_debug() macros and statements to eliminate compiler warnings.
-
-Version 1.0.8 [July 24, 2000]
- Added png_flush() in pngwrite.c, after png_write_IEND().
- Updated makefile.hpux to build a shared library.
-
-Version 1.0.9beta1 [November 10, 2000]
- Fixed typo in scripts/makefile.hpux
- Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
- Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
- Changed "cdrom.com" in documentation to "libpng.org"
- Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).
- Changed type of "params" from voidp to png_voidp in png_read|write_png().
- Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h.
- Revised the 3 instances of WRITEFILE in pngtest.c.
- Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory.
- Updated png.rc in dll/msvc project
- Revised makefile.dec to define and use LIBPATH and INCPATH
- Increased size of global png_libpng_ver[] array from 12 to 18 chars.
- Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const.
- Removed duplicate png_crc_finish() from png_handle_bKGD() function.
- Added a warning when application calls png_read_update_info() multiple times.
- Revised makefile.cygwin
- Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.
- Replaced png_set_empty_plte_permitted() with png_permit_mng_features().
-
-Version 1.0.9beta2 [November 19, 2000]
- Renamed the "dll" subdirectory "projects".
- Added borland project files to "projects" subdirectory.
- Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.
- Add error message in png_set_compression_buffer_size() when malloc fails.
-
-Version 1.0.9beta3 [November 23, 2000]
- Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
- Removed the png_flush() in pngwrite.c that crashes some applications
- that don't set png_output_flush_fn.
- Added makefile.macosx and makefile.aix to scripts directory.
-
-Version 1.0.9beta4 [December 1, 2000]
- Change png_chunk_warning to png_warning in png_check_keyword().
- Increased the first part of msg buffer from 16 to 18 in png_chunk_error().
-
-Version 1.0.9beta5 [December 15, 2000]
- Added support for filter method 64 (for PNG datastreams embedded in MNG).
-
-Version 1.0.9beta6 [December 18, 2000]
- Revised png_set_filter() to accept filter method 64 when appropriate.
- Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to
- help prevent applications from using MNG features in PNG datastreams.
- Added png_permit_mng_features() function.
- Revised libpng.3/libpng.txt. Changed "filter type" to "filter method".
-
-Version 1.0.9rc1 [December 23, 2000]
- Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c
- Fixed error handling of unknown compression type in png_decompress_chunk().
- In pngconf.h, define __cdecl when _MSC_VER is defined.
-
-Version 1.0.9beta7 [December 28, 2000]
- Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.
- Revised memory management in png_set_hIST and png_handle_hIST in a backward
- compatible manner. PLTE and tRNS were revised similarly.
- Revised the iCCP chunk reader to ignore trailing garbage.
-
-Version 1.0.9beta8 [January 12, 2001]
- Moved pngasmrd.h into pngconf.h.
- Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
-
-Version 1.0.9beta9 [January 15, 2001]
- Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
- wince and msvc project module definition files.
- Minor revision of makefile.cygwin.
- Fixed bug with progressive reading of narrow interlaced images in pngpread.c
-
-Version 1.0.9beta10 [January 16, 2001]
- Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.
- Fixed "png_mmx_supported" typo in project definition files.
-
-Version 1.0.9beta11 [January 19, 2001]
- Updated makefile.sgi to make shared library.
- Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED
- by default, for the benefit of DLL forward compatibility. These will
- be re-enabled in version 1.2.0.
-
-Version 1.0.9rc2 [January 22, 2001]
- Revised cygwin support.
-
-Version 1.0.9 [January 31, 2001]
- Added check of cygwin's ALL_STATIC in pngconf.h
- Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.
-
-Version 1.0.10beta1 [March 14, 2001]
- Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc.
- Reformatted libpng.3 to eliminate bad line breaks.
- Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c
- Added prototype for png_mmx_support() near the top of pnggccrd.c
- Moved some error checking from png_handle_IHDR to png_set_IHDR.
- Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros.
- Revised png_mmx_support() function in pnggccrd.c
- Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c
- Fixed memory leak in contrib/visupng/PngFile.c
- Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version)
- Added warnings when retrieving or setting gamma=0.
- Increased the first part of msg buffer from 16 to 18 in png_chunk_warning().
-
-Version 1.0.10rc1 [March 23, 2001]
- Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy,
- and png_strlen.
- Revised png_mmx_supported() function in pnggccrd.c to return proper value.
- Fixed bug in progressive reading (pngpread.c) with small images (height < 8).
-
-Version 1.0.10 [March 30, 2001]
- Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin
- Added beos project files (Chris Herborth)
-
-Version 1.0.11beta1 [April 3, 2001]
- Added type casts on several png_malloc() calls (Dimitri Papadapoulos).
- Removed a no-longer needed AIX work-around from pngconf.h
- Changed several "//" single-line comments to C-style in pnggccrd.c
-
-Version 1.0.11beta2 [April 11, 2001]
- Removed PNGAPI from several functions whose prototypes did not have PNGAPI.
- Updated scripts/pngos2.def
-
-Version 1.0.11beta3 [April 14, 2001]
- Added checking the results of many instances of png_malloc() for NULL
-
-Version 1.0.11beta4 [April 20, 2001]
- Undid the changes from version 1.0.11beta3. Added a check for NULL return
- from user's malloc_fn().
- Removed some useless type casts of the NULL pointer.
- Added makefile.netbsd
-
-Version 1.0.11 [April 27, 2001]
- Revised makefile.netbsd
-
-Version 1.0.12beta1 [May 14, 2001]
- Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot)
- Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h
- Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings.
- Eliminated the png_error about apps using png_read|write_init(). Instead,
- libpng will reallocate the png_struct and info_struct if they are too small.
- This retains future binary compatibility for old applications written for
- libpng-0.88 and earlier.
-
-Version 1.2.0beta1 [May 6, 2001]
- Bumped DLLNUM to 2.
- Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED
- by default.
- Added runtime selection of MMX features.
- Added png_set_strip_error_numbers function and related macros.
-
-Version 1.2.0beta2 [May 7, 2001]
- Finished merging 1.2.0beta1 with version 1.0.11
- Added a check for attempts to read or write PLTE in grayscale PNG datastreams.
-
-Version 1.2.0beta3 [May 17, 2001]
- Enabled user memory function by default.
- Modified png_create_struct so it passes user mem_ptr to user memory allocator.
- Increased png_mng_features flag from png_byte to png_uint_32.
- Bumped shared-library (so-number) and dll-number to 3.
-
-Version 1.2.0beta4 [June 23, 2001]
- Check for missing profile length field in iCCP chunk and free chunk_data
- in case of truncated iCCP chunk.
- Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc
- Bumped dll-number from 2 to 3 in makefile.cygwin
- Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly
- if user attempts to run it on an 8-bit display.
- Updated contrib/gregbook
- Use png_malloc instead of png_zalloc to allocate palette in pngset.c
- Updated makefile.ibmc
- Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes
- of png_write_oFFS width and height from png_uint_32 to png_int_32.
- Updated example.c
- Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c
-
-Version 1.2.0beta5 [August 8, 2001]
- Revised contrib/gregbook
- Revised makefile.gcmmx
- Revised pnggccrd.c to conditionally compile some thread-unsafe code only
- when PNG_THREAD_UNSAFE_OK is defined.
- Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with
- value exceeding 2^bit_depth-1
- Revised makefile.sgi and makefile.sggcc
- Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c
- Removed restriction that do_invert_mono only operate on 1-bit opaque files
-
-Version 1.2.0 [September 1, 2001]
- Changed a png_warning() to png_debug() in pnggccrd.c
- Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC().
-
-Version 1.2.1beta1 [October 19, 2001]
- Revised makefile.std in contrib/pngminus
- Include background_1 in png_struct regardless of gamma support.
- Revised makefile.netbsd and makefile.macosx, added makefile.darwin.
- Revised example.c to provide more details about using row_callback().
-
-Version 1.2.1beta2 [October 25, 2001]
- Added type cast to each NULL appearing in a function call, except for
- WINCE functions.
- Added makefile.so9.
-
-Version 1.2.1beta3 [October 27, 2001]
- Removed type casts from all NULLs.
- Simplified png_create_struct_2().
-
-Version 1.2.1beta4 [November 7, 2001]
- Revised png_create_info_struct() and png_creat_struct_2().
- Added error message if png_write_info() was omitted.
- Type cast NULLs appearing in function calls when _NO_PROTO or
- PNG_TYPECAST_NULL is defined.
-
-Version 1.2.1rc1 [November 24, 2001]
- Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL
- is defined.
- Changed typecast of "size" argument to png_size_t in pngmem.c calls to
- the user malloc_fn, to agree with the prototype in png.h
- Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev)
- Updated makefile.sgi to recognize LIBPATH and INCPATH.
- Updated various makefiles so "make clean" does not remove previous major
- version of the shared library.
-
-Version 1.2.1rc2 [December 4, 2001]
- Always allocate 256-entry internal palette, hist, and trans arrays, to
- avoid out-of-bounds memory reference caused by invalid PNG datastreams.
- Added a check for prefix_length > data_length in iCCP chunk handler.
-
-Version 1.2.1 [December 7, 2001]
- None.
-
-Version 1.2.2beta1 [February 22, 2002]
- Fixed a bug with reading the length of iCCP profiles (Larry Reeves).
- Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate
- libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h
- Revised makefile.darwin to remove "-undefined suppress" option.
- Added checks for gamma and chromaticity values over 21474.83, which exceed
- the limit for PNG unsigned 32-bit integers when encoded.
- Revised calls to png_create_read_struct() and png_create_write_struct()
- for simpler debugging.
- Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK)
-
-Version 1.2.2beta2 [February 23, 2002]
- Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths.
- Check for invalid image dimensions in png_get_IHDR.
- Added missing "fi;" in the install target of the SGI makefiles.
- Added install-static to all makefiles that make shared libraries.
- Always do gamma compensation when image is partially transparent.
-
-Version 1.2.2beta3 [March 7, 2002]
- Compute background.gray and background_1.gray even when color_type is RGB
- in case image gets reduced to gray later.
- Modified shared-library makefiles to install pkgconfig/libpngNN.pc.
- Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown
- Removed unused png_write_destroy_info prototype from png.h
- Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case
- Added install-shared target to all makefiles that make shared libraries.
- Stopped a double free of palette, hist, and trans when not using free_me.
- Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64.
-
-Version 1.2.2beta4 [March 8, 2002]
- Compute background.gray and background_1.gray even when color_type is RGB
- in case image gets reduced to gray later (Jason Summers).
- Relocated a misplaced /bin/rm in the "install-shared" makefile targets
- Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library.
-
-Version 1.2.2beta5 [March 26, 2002]
- Added missing PNGAPI to several function definitions.
- Check for invalid bit_depth or color_type in png_get_IHDR(), and
- check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen).
- Revised iTXt support to accept NULL for lang and lang_key.
- Compute gamma for color components of background even when color_type is gray.
- Changed "()" to "{}" in scripts/libpng.pc.in.
- Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN
- Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so
-
-Version 1.2.2beta6 [March 31, 2002]
-
-Version 1.0.13beta1 [March 31, 2002]
- Prevent png_zalloc() from trying to memset memory that it failed to acquire.
- Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate).
- Ensure that the right function (user or default) is used to free the
- png_struct after an error in png_create_read_struct_2().
-
-Version 1.2.2rc1 [April 7, 2002]
-
-Version 1.0.13rc1 [April 7, 2002]
- Save the ebx register in pnggccrd.c (Sami Farin)
- Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner).
- Updated makefiles to put headers in include/libpng and remove old include/*.h.
-
-Version 1.2.2 [April 15, 2002]
-
-Version 1.0.13 [April 15, 2002]
- Revised description of png_set_filter() in libpng.3/libpng.txt.
- Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd
-
-Version 1.0.13patch01 [April 17, 2002]
-
-Version 1.2.2patch01 [April 17, 2002]
- Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and
- makefile.sggcc
- Fixed VER -> PNGVER typo in makefile.macosx and added install-static to
- install
- Added install: target to makefile.32sunu and makefile.64sunu
-
-Version 1.0.13patch03 [April 18, 2002]
-
-Version 1.2.2patch03 [April 18, 2002]
- Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng
- subdirectory to libpngNN subdirectory without the full pathname.
- Moved generation of libpng.pc from "install" to "all" in 15 makefiles.
-
-Version 1.2.3rc1 [April 28, 2002]
- Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos).
- Added $(DESTDIR) feature to 24 makefiles (Tim Mooney)
- Fixed bug with $prefix, should be $(prefix) in makefile.hpux.
- Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin
- Added a link from libpngNN.pc to libpng.pc in 15 makefiles.
- Added links from include/libpngNN/*.h to include/*.h in 24 makefiles.
- Revised makefile.darwin to make relative links without full pathname.
- Added setjmp() at the end of png_create_*_struct_2() in case user forgets
- to put one in their application.
- Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and
- removed them from module definition files.
-
-Version 1.2.3rc2 [May 1, 2002]
- Fixed bug in reporting number of channels in pngget.c and pngset.c,
- that was introduced in version 1.2.2beta5.
- Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(),
- png_default_flush(), and png_push_fill_buffer() and included them in
- module definition files.
- Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles.
-
-Version 1.2.3rc3 [May 1, 2002]
- Revised prototype for png_default_flush()
- Remove old libpng.pc and libpngNN.pc before installing new ones.
-
-Version 1.2.3rc4 [May 2, 2002]
- Typos in *.def files (png_default_read|write -> png_default_read|write_data)
- In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc
- Added libpng-config and libpngNN-config and modified makefiles to install
- them.
- Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles
- Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp
-
-Version 1.2.3rc5 [May 11, 2002]
- Changed "error" and "message" in prototypes to "error_message" and
- "warning_message" to avoid namespace conflict.
- Revised 15 makefiles to build libpng-config from libpng-config-*.in
- Once more restored png_zalloc and png_zfree to regular nonexported form.
- Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer
- to nonexported form, but with PNGAPI, and removed them from module def
- files.
-
-Version 1.2.3rc6 [May 14, 2002]
- Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c
- Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp.
- Removed leftover libpng-config "sed" script from four makefiles.
- Revised libpng-config creating script in 16 makefiles.
-
-Version 1.2.3 [May 22, 2002]
- Revised libpng-config target in makefile.cygwin.
- Removed description of png_set_mem_fn() from documentation.
- Revised makefile.freebsd.
- Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR).
- Revised projects/msvc/README.txt
- Changed -lpng to -lpngNN in LDFLAGS in several makefiles.
-
-Version 1.2.4beta1 [May 24, 2002]
- Added libpng.pc and libpng-config to "all:" target in 16 makefiles.
- Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH)
- Added missing "\" before closing double quote in makefile.gcmmx.
- Plugged various memory leaks; added png_malloc_warn() and png_set_text_2()
- functions.
-
-Version 1.2.4beta2 [June 25, 2002]
- Plugged memory leak of png_ptr->current_text (Matt Holgate).
- Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison)
- Added -soname to the loader flags in makefile.dec, makefile.sgi, and
- makefile.sggcc.
- Added "test-installed" target to makefile.linux, makefile.gcmmx,
- makefile.sgi, and makefile.sggcc.
-
-Version 1.2.4beta3 [June 28, 2002]
- Plugged memory leak of row_buf in pngtest.c when there is a png_error().
- Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.
- Added "test-installed" target to makefile.32sunu, makefile.64sunu,
- makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,
- makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.
-
-Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
- Added "test-installed" target to makefile.cygwin and makefile.sco.
- Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro.
-
-Version 1.2.4 and 1.0.14 [July 8, 2002]
- Changed png_warning() to png_error() when width is too large to process.
-
-Version 1.2.4patch01 [July 20, 2002]
- Revised makefile.cygwin to use DLL number 12 instead of 13.
-
-Version 1.2.5beta1 [August 6, 2002]
- Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
- Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
- Removed some stray *.o files from contrib/gregbook.
- Changed png_error() to png_warning() about "Too much data" in pngpread.c
- and about "Extra compressed data" in pngrutil.c.
- Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
- Updated makefile.hpgcc
- Updated png.c and pnggccrd.c handling of return from png_mmx_support()
-
-Version 1.2.5beta2 [August 15, 2002]
- Only issue png_warning() about "Too much data" in pngpread.c when avail_in
- is nonzero.
- Updated makefiles to install a separate libpng.so.3 with its own rpath.
-
-Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
- Revised makefiles to not remove previous minor versions of shared libraries.
-
-Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
- Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
- library loader directive.
- Added missing "$OBJSDLL" line to makefile.gcmmx.
- Added missing "; fi" to makefile.32sunu.
-
-Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
- Revised libpng-config script.
-
-Version 1.2.5 and 1.0.15 [October 3, 2002]
- Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,
- and makefile.aix.
- Relocated two misplaced PNGAPI lines in pngtest.c
-
-Version 1.2.6beta1 [October 22, 2002]
- Commented out warning about uninitialized mmx_support in pnggccrd.c.
- Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.
- Relocated two more misplaced PNGAPI lines in pngtest.c
- Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams,
- introduced in version 1.0.2.
- Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu.
-
-Version 1.2.6beta2 [November 1, 2002]
- Added libpng-config "--ldopts" output.
- Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)"
- in makefiles.
-
-Version 1.2.6beta3 [July 18, 2004]
- Reverted makefile changes from version 1.2.6beta2 and some of the changes
- from version 1.2.6beta1; these will be postponed until version 1.2.7.
- Version 1.2.6 is going to be a simple bugfix release.
- Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile.
- Fixed potential overrun in pngerror.c by using strncpy instead of memcpy.
- Added "#!/bin/sh" at the top of configure, for recognition of the
- 'x' flag under Cygwin (Cosmin).
- Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin).
- Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin).
- Fixed the special memory handler for Borland C under DOS, in pngmem.c
- (Cosmin).
- Removed some spurious assignments in pngrutil.c (Cosmin).
- Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings
- on 16-bit platforms (Cosmin).
- Enclosed shift op expressions in parentheses, to silence warnings (Cosmin).
- Used proper type png_fixed_point, to avoid problems on 16-bit platforms,
- in png_handle_sRGB() (Cosmin).
- Added compression_type to png_struct, and optimized the window size
- inside the deflate stream (Cosmin).
- Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin).
- Fixed handling of unknown chunks that come after IDAT (Cosmin).
- Allowed png_error() and png_warning() to work even if png_ptr == NULL
- (Cosmin).
- Replaced row_info->rowbytes with row_bytes in png_write_find_filter()
- (Cosmin).
- Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre).
- Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded
- values in png.c (Simon-Pierre, Cosmin).
- Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre).
- Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc
- (Simon-Pierre).
- Moved the definition of PNG_HEADER_VERSION_STRING near the definitions
- of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin).
- Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin).
- Updated scripts/makefile.vc(a)win32 (Cosmin).
- Updated the MSVC project (Simon-Pierre, Cosmin).
- Updated the Borland C++ Builder project (Cosmin).
- Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin).
- Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin).
- Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin).
- Added extra guard around inclusion of Turbo C memory headers, in pngconf.h
- (Cosmin).
- Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to
- projects/cbuilder5/ (Cosmin).
- Moved projects/visualc6/png32ms.def to scripts/pngw32.def,
- and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin).
- Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin).
- Changed line endings to DOS style in cbuilder5 and visualc6 files, even
- in the tar.* distributions (Cosmin).
- Updated contrib/visupng/VisualPng.dsp (Cosmin).
- Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin).
- Added a separate distribution with "configure" and supporting files (Junichi).
-
-Version 1.2.6beta4 [July 28, 2004]
- Added user ability to change png_size_t via a PNG_SIZE_T macro.
- Added png_sizeof() and png_convert_size() functions.
- Added PNG_SIZE_MAX (maximum value of a png_size_t variable.
- Added check in png_malloc_default() for (size_t)size != (png_uint_32)size
- which would indicate an overflow.
- Changed sPLT failure action from png_error to png_warning and abandon chunk.
- Changed sCAL and iCCP failures from png_error to png_warning and abandon.
- Added png_get_uint_31(png_ptr, buf) function.
- Added PNG_UINT_32_MAX macro.
- Renamed PNG_MAX_UINT to PNG_UINT_31_MAX.
- Made png_zalloc() issue a png_warning and return NULL on potential
- overflow.
- Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x
- Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4.
- Revised Borland portion of png_malloc() to return NULL or issue
- png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK.
- Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove
- sequential read support.
- Added some "#if PNG_WRITE_SUPPORTED" blocks.
- Added #ifdef to remove some redundancy in png_malloc_default().
- Use png_malloc instead of png_zalloc to allocate the pallete.
-
-Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
- Fixed buffer overflow vulnerability in png_handle_tRNS()
- Fixed integer arithmetic overflow vulnerability in png_read_png().
- Fixed some harmless bugs in png_handle_sBIT, etc, that would cause
- duplicate chunk types to go undetected.
- Fixed some timestamps in the -config version
- Rearranged order of processing of color types in png_handle_tRNS().
- Added ROWBYTES macro to calculate rowbytes without integer overflow.
- Updated makefile.darwin and removed makefile.macosx from scripts directory.
- Imposed default one million column, one-million row limits on the image
- dimensions, and added png_set_user_limits() function to override them.
- Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro.
- Fixed wrong cast of returns from png_get_user_width|height_max().
- Changed some "keep the compiler happy" from empty statements to returns,
- Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution
-
-Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004]
- Revised makefile.darwin and makefile.solaris. Removed makefile.macosx.
- Revised pngtest's png_debug_malloc() to use png_malloc() instead of
- png_malloc_default() which is not supposed to be exported.
- Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in
- pngpread.c. Bug was introduced in 1.2.6rc1.
- Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1.
- Fixed old bug in RGB to Gray transformation.
- Fixed problem with 64-bit compilers by casting arguments to abs()
- to png_int_32.
- Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9).
- Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin)
- Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles.
- Added code to update the row_info->colortype in png_do_read_filler() (MSB).
-
-Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004]
- Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid
- trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro.
- Revised documentation of png_set_keep_unknown_chunks().
- Check handle_as_unknown status in pngpread.c, as in pngread.c previously.
- Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h
- Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c
-
-Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004]
- Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of
- "pinfo" was out of place).
-
-Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]
- Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED
- section of png.h where they were inadvertently placed in version rc3.
-
-Version 1.2.6 and 1.0.16 [August 15, 2004]
- Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.
-
-Version 1.2.7beta1 [August 26, 2004]
- Removed unused pngasmrd.h file.
- Removed references to uu.net for archived files. Added references to
- PNG Spec (second edition) and the PNG ISO/IEC Standard.
- Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR.
- Fixed bug with "optimized window size" in the IDAT datastream, that
- causes libpng to write PNG files with incorrect zlib header bytes.
-
-Version 1.2.7beta2 [August 28, 2004]
- Fixed bug with sCAL chunk and big-endian machines (David Munro).
- Undid new code added in 1.2.6rc2 to update the color_type in
- png_set_filler().
- Added png_set_add_alpha() that updates color type.
-
-Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]
- Revised png_set_strip_filler() to not remove alpha if color_type has alpha.
-
-Version 1.2.7 and 1.0.17 [September 12, 2004]
- Added makefile.hp64
- Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin
-
-Version 1.2.8beta1 [November 1, 2004]
- Fixed bug in png_text_compress() that would fail to complete a large block.
- Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
- strip alpha operation in png_do_strip_filler().
- Added PNG_1_2_X definition in pngconf.h
- Use #ifdef to comment out png_info_init in png.c and png_read_init in
- pngread.c (as of 1.3.0)
-
-Version 1.2.8beta2 [November 2, 2004]
- Reduce color_type to a nonalpha type after strip alpha operation in
- png_do_strip_filler().
-
-Version 1.2.8beta3 [November 3, 2004]
- Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM
-
-Version 1.2.8beta4 [November 12, 2004]
- Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).
- Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).
- Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection
- of data type in deflate (Cosmin).
- Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of
- PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
-
-Version 1.2.8beta5 [November 20, 2004]
- Use png_ptr->flags instead of png_ptr->transformations to pass
- PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI
- compatibility.
- Revised handling of SPECIALBUILD, PRIVATEBUILD,
- PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
-
-Version 1.2.8rc1 [November 24, 2004]
- Moved handling of BUILD macros from pngconf.h to png.h
- Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently
- omitted from beta5.
- Revised scripts/pngw32.rc
- Despammed mailing addresses by masking "@" with "at".
- Inadvertently installed a supposedly faster test version of pngrutil.c
-
-Version 1.2.8rc2 [November 26, 2004]
- Added two missing "\" in png.h
- Change tests in pngread.c and pngpread.c to
- if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
- png_do_read_transformations(png_ptr);
-
-Version 1.2.8rc3 [November 28, 2004]
- Reverted pngrutil.c to version libpng-1.2.8beta5.
- Added scripts/makefile.elf with supporting code in pngconf.h for symbol
- versioning (John Bowler).
-
-Version 1.2.8rc4 [November 29, 2004]
- Added projects/visualc7 (Simon-pierre).
-
-Version 1.2.8rc5 [November 29, 2004]
- Fixed new typo in scripts/pngw32.rc
-
-Version 1.2.8 [December 3, 2004]
- Removed projects/visualc7, added projects/visualc71.
-
-Version 1.2.9beta1 [February 21, 2006]
- Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints
- Revised man page and libpng.txt to make it clear that one should not call
- png_read_end or png_write_end after png_read_png or png_write_png.
- Updated references to png-mng-implement mailing list.
- Fixed an incorrect typecast in pngrutil.c
- Added PNG_NO_READ_SUPPORTED conditional for making a write-only library.
- Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional.
- Optimized alpha-inversion loops in pngwtran.c
- Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c
- Make sure num_trans is <= 256 before copying data in png_set_tRNS().
- Make sure num_palette is <= 256 before copying data in png_set_PLTE().
- Interchanged order of write_swap_alpha and write_invert_alpha transforms.
- Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).
- Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin).
- Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin).
- Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16,
- png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin).
- Added type cast (png_byte) in png_write_sCAL() (Cosmin).
- Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin).
- Default iTXt support was inadvertently enabled.
-
-Version 1.2.9beta2 [February 21, 2006]
- Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
- checking for png_read_dither in pngrtran.c
- Revised checking of chromaticity limits to accommodate extended RGB
- colorspace (John Denker).
- Changed line endings in some of the project files to CRLF, even in the
- "Unix" tar distributions (Cosmin).
- Made png_get_int_32 and png_save_int_32 always available (Cosmin).
- Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def
- with the newly exported functions.
- Eliminated distributions without the "configure" script.
- Updated INSTALL instructions.
-
-Version 1.2.9beta3 [February 24, 2006]
- Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp
- Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)
- Removed reference to pngasmrd.h from Makefile.am
- Renamed CHANGES to ChangeLog.
- Renamed LICENSE to COPYING.
- Renamed ANNOUNCE to NEWS.
- Created AUTHORS file.
-
-Version 1.2.9beta4 [March 3, 2006]
- Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
- Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
- Removed newline from the end of some error and warning messages.
- Removed test for sqrt() from configure.ac and configure.
- Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).
- Disabled default iTXt support that was inadvertently enabled in
- libpng-1.2.9beta1.
- Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
- Removed libpng version and date from *.c files.
-
-Version 1.2.9beta5 [March 4, 2006]
- Removed trailing blanks from source files.
- Put version and date of latest change in each source file, and changed
- copyright year accordingly.
- More cleanup of configure.ac, Makefile.am, and associated scripts.
- Restored scripts/makefile.elf which was inadvertently deleted.
-
-Version 1.2.9beta6 [March 6, 2006]
- Fixed typo (RELEASE) in configuration files.
-
-Version 1.2.9beta7 [March 7, 2006]
- Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
- Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()
- in png.h.
- Updated makefile.elf as suggested by debian.
- Made cosmetic changes to some makefiles, adding LN_SF and other macros.
- Made some makefiles accept "exec_prefix".
-
-Version 1.2.9beta8 [March 9, 2006]
- Fixed some "#if defined (..." which should be "#if defined(..."
- Bug introduced in libpng-1.2.8.
- Fixed inconsistency in definition of png_default_read_data()
- Restored blank that was lost from makefile.sggcc "clean" target in beta7.
- Revised calculation of "current" and "major" for irix in ltmain.sh
- Changed "mkdir" to "MKDIR_P" in some makefiles.
- Separated PNG_EXPAND and PNG_EXPAND_tRNS.
- Added png_set_expand_gray_1_2_4_to_8() and deprecated
- png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.
-
-Version 1.2.9beta9 [March 10, 2006]
- Include "config.h" in pngconf.h when available.
- Added some checks for NULL png_ptr or NULL info_ptr (timeless)
-
-Version 1.2.9beta10 [March 20, 2006]
- Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)
- Made pnggccrd.c PIC-compliant (Christian Aichinger).
- Added makefile.mingw (Wolfgang Glas).
- Revised pngconf.h MMX checking.
-
-Version 1.2.9beta11 [March 22, 2006]
- Fixed out-of-order declaration in pngwrite.c that was introduced in beta9
- Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.
-
-Version 1.2.9rc1 [March 31, 2006]
- Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).
- Removed nonsensical assertion check from pngtest.c (Cosmin).
-
-Version 1.2.9 [April 14, 2006]
- Revised makefile.beos and added "none" selector in ltmain.sh
-
-Version 1.2.10beta1 [April 15, 2006]
- Renamed "config.h" to "png_conf.h" and revised Makefile.am to add
- -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h
- to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.
-
-Version 1.2.10beta2 [April 15, 2006]
- Manually updated Makefile.in and configure. Changed png_conf.h.in
- back to config.h.
-
-Version 1.2.10beta3 [April 15, 2006]
- Change png_conf.h back to config.h in pngconf.h.
-
-Version 1.2.10beta4 [April 16, 2006]
- Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.
-
-Version 1.2.10beta5 [April 16, 2006]
- Added a configure check for compiling assembler code in pnggccrd.c
-
-Version 1.2.10beta6 [April 17, 2006]
- Revised the configure check for pnggccrd.c
- Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@
- Added @LIBPNG_DEFINES@ to arguments when building libpng.sym
-
-Version 1.2.10beta7 [April 18, 2006]
- Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.
-
-Version 1.2.10rc1 [April 19, 2006]
- Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD
- Fixed "LN_FS" typo in makefile.sco and makefile.solaris.
-
-Version 1.2.10rc2 [April 20, 2006]
- Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE
- in configure.ac and configure
- Made the configure warning about versioned symbols less arrogant.
-
-Version 1.2.10rc3 [April 21, 2006]
- Added a note in libpng.txt that png_set_sig_bytes(8) can be used when
- writing an embedded PNG without the 8-byte signature.
- Revised makefiles and configure to avoid making links to libpng.so.*
-
-Version 1.2.10 [April 23, 2006]
- Reverted configure to "rc2" state.
-
-Version 1.2.11beta1 [May 31, 2006]
- scripts/libpng.pc.in contained "configure" style version info and would
- not work with makefiles.
- The shared-library makefiles were linking to libpng.so.0 instead of
- libpng.so.3 compatibility as the library.
-
-Version 1.2.11beta2 [June 2, 2006]
- Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
- buffer overflow.
- Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb)
-
-Version 1.2.11beta3 [June 5, 2006]
- Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin).
- Removed the accidental leftover Makefile.in~ (Cosmin).
- Avoided potential buffer overflow and optimized buffer in
- png_write_sCAL(), png_write_sCAL_s() (Cosmin).
- Removed the include directories and libraries from CFLAGS and LDFLAGS
- in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin).
-
-Version 1.2.11beta4 [June 6, 2006]
- Allow zero-length IDAT chunks after the entire zlib datastream, but not
- after another intervening chunk type.
-
-Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]
- Deleted extraneous square brackets from [config.h] in configure.ac
-
-Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]
- Added prototypes for PNG_INCH_CONVERSIONS functions to png.h
- Revised INSTALL and autogen.sh
- Fixed typo in several makefiles (-W1 should be -Wl)
- Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
-
-Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]
- Removed the new typedefs for 64-bit systems (delay until version 1.4.0)
- Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid
- reading out of bounds.
-
-Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]
- Really removed the new typedefs for 64-bit systems.
-
-Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]
- Removed png_sig_bytes entry from scripts/pngw32.def
-
-Version 1.0.19, 1.2.11 [June 26, 2006]
- None.
-
-Version 1.0.20, 1.2.12 [June 27, 2006]
- Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
- buffer overflow.
-
-Version 1.2.13beta1 [October 2, 2006]
- Removed AC_FUNC_MALLOC from configure.ac
- Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
- Change "logical" to "bitwise" throughout documentation.
- Detect and fix attempt to write wrong iCCP profile length.
-
-Version 1.0.21, 1.2.13 [November 14, 2006]
- Fix potential buffer overflow in sPLT chunk handler.
- Fix Makefile.am to not try to link to noexistent files.
- Check all exported functions for NULL png_ptr.
-
-Version 1.2.14beta1 [November 17, 2006]
- Relocated three misplaced tests for NULL png_ptr.
- Built Makefile.in with automake-1.9.6 instead of 1.9.2.
- Build configure with autoconf-2.60 instead of 2.59
-
-Version 1.2.14beta2 [November 17, 2006]
- Added some typecasts in png_zalloc().
-
-Version 1.2.14rc1 [November 20, 2006]
- Changed "strtod" to "png_strtod" in pngrutil.c
-
-Version 1.0.22, 1.2.14 [November 27, 2006]
- Added missing "$(srcdir)" in Makefile.am and Makefile.in
-
-Version 1.2.15beta1 [December 3, 2006]
- Generated configure with autoconf-2.61 instead of 2.60
- Revised configure.ac to update libpng.pc and libpng-config.
-
-Version 1.2.15beta2 [December 3, 2006]
- Always export MMX asm functions, just stubs if not building pnggccrd.c
-
-Version 1.2.15beta3 [December 4, 2006]
- Add "png_bytep" typecast to profile while calculating length in pngwutil.c
-
-Version 1.2.15beta4 [December 7, 2006]
- Added scripts/CMakeLists.txt
- Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta
-
-Version 1.2.15beta5 [December 7, 2006]
- Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c
- Revised scripts/CMakeLists.txt
-
-Version 1.2.15beta6 [December 13, 2006]
- Revised scripts/CMakeLists.txt and configure.ac
-
-Version 1.2.15rc1 [December 18, 2006]
- Revised scripts/CMakeLists.txt
-
-Version 1.2.15rc2 [December 21, 2006]
- Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
- Added scripts/makefile.nommx
-
-Version 1.2.15rc3 [December 25, 2006]
- Fixed shared library numbering error that was introduced in 1.2.15beta6.
-
-Version 1.2.15rc4 [December 27, 2006]
- Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.
-
-Version 1.2.15rc5 [December 31, 2006]
- Revised handling of rgb_to_gray.
-
-Version 1.2.15 [January 5, 2007]
- Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
-
-Version 1.2.16beta1 [January 6, 2007]
- Fix bugs in makefile.nommx
-
-Version 1.2.16beta2 [January 16, 2007]
- Revised scripts/CMakeLists.txt
-
-Version 1.2.16 [January 31, 2007]
- No changes.
-
-Version 1.2.17beta1 [March 6, 2007]
- Revised scripts/CMakeLists.txt to install both shared and static libraries.
- Deleted a redundant line from pngset.c.
-
-Version 1.2.17beta2 [April 26, 2007]
- Relocated misplaced test for png_ptr == NULL in pngpread.c
- Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN
- flags.
- Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_*
- Added pngerror() when write_IHDR fails in deflateInit2().
- Added "const" to some array declarations.
- Mention examples of libpng usage in the libpng*.txt and libpng.3 documents.
-
-Version 1.2.17rc1 [May 4, 2007]
- No changes.
-
-Version 1.2.17rc2 [May 8, 2007]
- Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications
- calling set_unknown_chunk_location() need them.
- Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in
- png_set_expand_gray_1_2_4_to_8().
- Added png_ptr->unknown_chunk to hold working unknown chunk data, so it
- can be free'ed in case of error. Revised unknown chunk handling in
- pngrutil.c and pngpread.c to use this structure.
-
-Version 1.2.17rc3 [May 8, 2007]
- Revised symbol-handling in configure script.
-
-Version 1.2.17rc4 [May 10, 2007]
- Revised unknown chunk handling to avoid storing unknown critical chunks.
-
-Version 1.0.25 [May 15, 2007]
-Version 1.2.17 [May 15, 2007]
- Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,
- to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664)
-
-Version 1.0.26 [May 15, 2007]
-Version 1.2.18 [May 15, 2007]
- Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script
-
-Version 1.2.19beta1 [May 18, 2007]
- Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
- change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST"
- Changed some handling of unused parameters, to avoid compiler warnings.
- "if (unused == NULL) return;" becomes "unused = unused".
-
-Version 1.2.19beta2 [May 18, 2007]
- Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier)
-
-Version 1.2.19beta3 [May 19, 2007]
- Add some "png_byte" typecasts in png_check_keyword() and write new_key
- instead of key in zTXt chunk (Kevin Ryde).
-
-Version 1.2.19beta4 [May 21, 2007]
- Add png_snprintf() function and use it in place of sprint() for improved
- defense against buffer overflows.
-
-Version 1.2.19beta5 [May 21, 2007]
- Fixed png_handle_tRNS() to only use the valid bits of tRNS value.
- Changed handling of more unused parameters, to avoid compiler warnings.
- Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.
-
-Version 1.2.19beta6 [May 22, 2007]
- Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
- Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
-
-Version 1.2.19beta7 [May 22, 2007]
- Squelched png_squelch_warnings() in pnggccrd.c and added
- an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
- the warnings that png_squelch_warnings was squelching.
-
-Version 1.2.19beta8 [May 22, 2007]
- Removed __MMX__ from test in pngconf.h.
-
-Version 1.2.19beta9 [May 23, 2007]
- Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
- Revised png_squelch_warnings() so it might work.
- Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.
-
-Version 1.2.19beta10 [May 24, 2007]
- Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.
-
-Version 1.4.0beta1 [April 20, 2006]
- Enabled iTXt support (changes png_struct, thus requires so-number change).
- Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED
- Eliminated PNG_1_0_X and PNG_1_2_X macros.
- Removed deprecated functions png_read_init, png_write_init, png_info_init,
- png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and
- removed the deprecated macro PNG_MAX_UINT.
- Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h
- Removed many WIN32_WCE #ifdefs (Cosmin).
- Reduced dependency on C-runtime library when on Windows (Simon-Pierre)
- Replaced sprintf() with png_sprintf() (Simon-Pierre)
-
-Version 1.4.0beta2 [April 20, 2006]
- Revised makefiles and configure to avoid making links to libpng.so.*
- Moved some leftover MMX-related defines from pngconf.h to pngintrn.h
- Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def
-
-Version 1.4.0beta3 [May 10, 2006]
- Updated scripts/pngw32.def to comment out MMX functions.
- Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros.
- Scripts/libpng.pc.in contained "configure" style version info and would
- not work with makefiles.
- Revised pngconf.h and added pngconf.h.in, so makefiles and configure can
- pass defines to libpng and applications.
-
-Version 1.4.0beta4 [May 11, 2006]
- Revised configure.ac, Makefile.am, and many of the makefiles to write
- their defines in pngconf.h.
-
-Version 1.4.0beta5 [May 15, 2006]
- Added a missing semicolon in Makefile.am and Makefile.in
- Deleted extraneous square brackets from configure.ac
-
-Version 1.4.0beta6 [June 2, 2006]
- Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
- buffer overflow.
- Changed sonum from 0 to 1.
- Removed unused prototype for png_check_sig() from png.h
-
-Version 1.4.0beta7 [June 16, 2006]
- Exported png_write_sig (Cosmin).
- Optimized buffer in png_handle_cHRM() (Cosmin).
- Set pHYs = 2835 x 2835 pixels per meter, and added
- sCAL = 0.352778e-3 x 0.352778e-3 meters, in pngtest.png (Cosmin).
- Added png_set_benign_errors(), png_benign_error(), png_chunk_benign_error().
- Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
- Added "(unsigned long)" typecast on png_uint_32 variables in printf lists.
-
-Version 1.4.0beta8 [June 22, 2006]
- Added demonstration of user chunk support in pngtest.c, to support the
- public sTER chunk and a private vpAg chunk.
-
-Version 1.4.0beta9 [July 3, 2006]
- Removed ordinals from scripts/pngw32.def and removed png_info_int and
- png_set_gray_1_2_4_to_8 entries.
- Inline call of png_get_uint_32() in png_get_uint_31().
- Use png_get_uint_31() to get vpAg width and height in pngtest.c
- Removed WINCE and Netware projects.
- Removed standalone Y2KINFO file.
-
-Version 1.4.0beta10 [July 12, 2006]
- Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and
- some makefiles, because it was not working reliably. Instead, distribute
- pngconf.h.in along with pngconf.h and cause configure and some of the
- makefiles to update pngconf.h from pngconf.h.in.
- Added pngconf.h to DEPENDENCIES in Makefile.am
-
-Version 1.4.0beta11 [August 19, 2006]
- Removed AC_FUNC_MALLOC from configure.ac.
- Added a warning when writing iCCP profile with mismatched profile length.
- Patched pnggccrd.c to assemble on x86_64 platforms.
- Moved chunk header reading into a separate function png_read_chunk_header()
- in pngrutil.c. The chunk header (len+sig) is now serialized in a single
- operation (Cosmin).
- Implemented support for I/O states. Added png_ptr member io_state, and
- functions png_get_io_chunk_name() and png_get_io_state() in pngget.c
- (Cosmin).
- Added png_get_io_chunk_name and png_get_io_state to scripts/*.def (Cosmin).
- Renamed scripts/pngw32.* to scripts/pngwin.* (Cosmin).
- Removed the include directories and libraries from CFLAGS and LDFLAGS
- in scripts/makefile.gcc (Cosmin).
- Used png_save_uint_32() to set vpAg width and height in pngtest.c (Cosmin).
- Cast to proper type when getting/setting vpAg units in pngtest.c (Cosmin).
- Added pngintrn.h to the Visual C++ projects (Cosmin).
- Removed scripts/list (Cosmin).
- Updated copyright year in scripts/pngwin.def (Cosmin).
- Removed PNG_TYPECAST_NULL and used standard NULL consistently (Cosmin).
- Disallowed the user to redefine png_size_t, and enforced a consistent use
- of png_size_t across libpng (Cosmin).
- Changed the type of png_ptr->rowbytes, PNG_ROWBYTES() and friends
- to png_size_t (Cosmin).
- Removed png_convert_size() and replaced png_sizeof with sizeof (Cosmin).
- Removed some unnecessary type casts (Cosmin).
- Changed prototype of png_get_compression_buffer_size() and
- png_set_compression_buffer_size() to work with png_size_t instead of
- png_uint_32 (Cosmin).
- Removed png_memcpy_check() and png_memset_check() (Cosmin).
- Fixed a typo (png_byte --> png_bytep) in libpng.3 and libpng.txt (Cosmin).
- Clarified that png_zalloc() does not clear the allocated memory,
- and png_zalloc() and png_zfree() cannot be PNGAPI (Cosmin).
- Renamed png_mem_size_t to png_alloc_size_t, fixed its definition in
- pngconf.h, and used it in all memory allocation functions (Cosmin).
- Renamed pngintrn.h to pngpriv.h, added a comment at the top of the file
- mentioning that the symbols declared in that file are private, and
- updated the scripts and the Visual C++ projects accordingly (Cosmin).
- Removed circular references between pngconf.h and pngconf.h.in in
- scripts/makefile.vc*win32 (Cosmin).
- Removing trailing '.' from the warning and error messages (Cosmin).
- Added pngdefs.h that is built by makefile or configure, instead of
- pngconf.h.in (Glenn).
- Detect and fix attempt to write wrong iCCP profile length.
-
-Version 1.4.0beta12 [October 19, 2006]
- Changed "logical" to "bitwise" in the documentation.
- Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
- Add a typecast to stifle compiler warning in pngrutil.c
-
-Version 1.4.0beta13 [November 10, 2006]
- Fix potential buffer overflow in sPLT chunk handler.
- Fix Makefile.am to not try to link to noexistent files.
-
-Version 1.4.0beta14 [November 15, 2006]
- Check all exported functions for NULL png_ptr.
-
-Version 1.4.0beta15 [November 17, 2006]
- Relocated two misplaced tests for NULL png_ptr.
- Built Makefile.in with automake-1.9.6 instead of 1.9.2.
- Build configure with autoconf-2.60 instead of 2.59
- Add "install: all" in Makefile.am so "configure; make install" will work.
-
-Version 1.4.0beta16 [November 17, 2006]
- Added a typecast in png_zalloc().
-
-Version 1.4.0beta17 [December 4, 2006]
- Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c
- Add "png_bytep" typecast to profile while calculating length in pngwutil.c
-
-Version 1.4.0beta18 [December 7, 2006]
- Added scripts/CMakeLists.txt
-
-Version 1.4.0beta19 [May 16, 2007]
- Revised scripts/CMakeLists.txt
- Rebuilt configure and Makefile.in with newer tools.
- Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
- Added scripts/makefile.nommx
-
-Version 1.4.0beta20 [July 9, 2008]
- Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications
- calling set_unknown_chunk_location() need them.
- Moved several macro definitions from pngpriv.h to pngconf.h
- Merge with changes to the 1.2.X branch, as of 1.2.30beta04.
- Deleted all use of the MMX assembler code and Intel-licensed optimizations.
- Revised makefile.mingw
-
-Version 1.4.0beta21 [July 21, 2008]
- Moved local array "chunkdata" from pngrutil.c to the png_struct, so
- it will be freed by png_read_destroy() in case of a read error (Kurt
- Christensen).
-
-Version 1.4.0beta22 [July 21, 2008]
- Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking.
-
-Version 1.4.0beta23 [July 22, 2008]
- Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in
- png_decompress_chunk().
-
-Version 1.4.0beta24 [July 25, 2008]
- Change all remaining "chunkdata" to "png_ptr->chunkdata" in
- png_decompress_chunk(), and remove "chunkdata" from parameter list.
- Put a call to png_check_chunk_name() in png_read_chunk_header().
- Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte.
- Removed two calls to png_check_chunk_name() occuring later in the process.
- Define PNG_NO_ERROR_NUMBERS by default in pngconf.h
-
-Version 1.4.0beta25 [July 30, 2008]
- Added a call to png_check_chunk_name() in pngpread.c
- Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte.
- Added png_push_have_buffer() function to pngpread.c
- Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros.
- Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS.
- Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code.
- Synced contrib directory and configure files with libpng-1.2.30beta06.
- Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles)
- Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c
-
-Version 1.4.0beta26 [August 4, 2008]
- Removed png_push_have_buffer() function in pngpread.c. It increased the
- compiled library size slightly.
- Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta)
- Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings.
- Updated contrib/visupng/cexcept.h to version 2.0.1
- Added PNG_LITERAL_CHARACTER macros for #, [, and ].
-
-Version 1.4.0beta27 [August 5, 2008]
- Revised usage of PNG_LITERAL_SHARP in pngerror.c.
- Moved newline character from individual png_debug messages into the
- png_debug macros.
- Allow user to #define their own png_debug, png_debug1, and png_debug2.
-
-Version 1.4.0beta28 [August 5, 2008]
- Revised usage of PNG_LITERAL_SHARP in pngerror.c.
- Added PNG_STRING_NEWLINE macro
-
-Version 1.4.0beta29 [August 9, 2008]
- Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers.
- Added PNG_STRING_COPYRIGHT macro.
- Added non-ISO versions of png_debug macros.
-
-Version 1.4.0beta30 [August 14, 2008]
- Added premultiplied alpha feature (Volker Wiendl).
-
-Version 1.4.0beta31 [August 18, 2008]
- Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c
- Removed extra crc check at the end of png_handle_cHRM(). Bug introduced
- in libpng-1.4.0beta20.
-
-Version 1.4.0beta32 [August 19, 2008]
- Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.
- Revised PNG_NO_STDIO version of png_write_flush()
-
-Version 1.4.0beta33 [August 20, 2008]
- Added png_get|set_chunk_cache_max() to limit the total number of sPLT,
- text, and unknown chunks that can be stored.
-
-Version 1.4.0beta34 [September 6, 2008]
- Shortened tIME_string to 29 bytes in pngtest.c
- Fixed off-by-one error introduced in png_push_read_zTXt() function in
- libpng-1.2.30beta04/pngpread.c (Harald van Dijk)
-
-Version 1.4.0beta35 [October 6, 2008]
- Changed "trans_values" to "trans_color".
- Changed so-number from 0 to 14. Some OS do not like 0.
- Revised makefile.darwin to fix shared library numbering.
- Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8()
- in example.c (debian bug report)
-
-Version 1.4.0beta36 [October 25, 2008]
- Sync with tEXt vulnerability fix in libpng-1.2.33rc02.
-
-Version 1.4.0beta37 [November 13, 2008]
- Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c,
- and pngwrite.c
-
-Version 1.4.0beta38 [November 22, 2008]
- Added check for zero-area RGB cHRM triangle in png_check_cHRM() and
- png_check_cHRM_fixed().
-
-Version 1.4.0beta39 [November 23, 2008]
- Revised png_warning() to write its message on standard output by default
- when warning_fn is NULL.
-
-Version 1.4.0beta40 [November 24, 2008]
- Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed().
- In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant
- check for all-zero coordinates that is detected by the triangle check.
-
-Version 1.4.0beta41 [November 26, 2008]
- Fixed string vs pointer-to-string error in png_check_keyword().
- Rearranged test expressions in png_check_cHRM_fixed() to avoid internal
- overflows.
- Added PNG_NO_CHECK_cHRM conditional.
-
-Version 1.4.0beta42, 43 [December 1, 2008]
- Merge png_debug with version 1.2.34beta04.
-
-Version 1.4.0beta44 [December 6, 2008]
- Removed redundant check for key==NULL before calling png_check_keyword()
- to ensure that new_key gets initialized and removed extra warning
- (Merge with version 1.2.34beta05 -- Arvan Pritchard).
-
-Version 1.4.0beta45 [December 9, 2008]
- In png_write_png(), respect the placement of the filler bytes in an earlier
- call to png_set_filler() (Jim Barry).
-
-Version 1.4.0beta46 [December 10, 2008]
- Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and
- PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated
- PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
-
-Version 1.4.0beta47 [December 15, 2008]
- Support for dithering was disabled by default, because it has never
- been well tested and doesn't work very well. The code has not
- been removed, however, and can be enabled by building libpng with
- PNG_READ_DITHER_SUPPORTED defined.
-
-Version 1.4.0beta48 [February 14, 2009]
- Added new exported function png_calloc().
- Combined several instances of png_malloc(); png_memset() into png_calloc().
- Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
- but was never defined.
-
-Version 1.4.0beta49 [February 28, 2009]
- Added png_fileno() macro to pngconf.h, used in pngwio.c
- Corrected order of #ifdef's in png_debug definition in png.h
- Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments
- for pcal_params.
- Fixed order of #ifdef directives in the png_debug defines in png.h
- (bug introduced in libpng-1.2.34/1.4.0beta29).
- Revised comments in png_set_read_fn() and png_set_write_fn().
-
-Version 1.4.0beta50 [March 18, 2009]
- Use png_calloc() instead of png_malloc() to allocate big_row_buf when
- reading an interlaced file, to avoid a possible UMR.
- Undid revision of PNG_NO_STDIO version of png_write_flush(). Users
- having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined
- or supply their own flush_fn() replacement.
- Revised libpng*.txt and png.h documentation about use of png_write_flush()
- and png_set_write_fn().
- Removed fflush() from pngtest.c.
- Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
-
-Version 1.4.0beta51 [March 21, 2009]
- Removed new png_fileno() macro from pngconf.h .
-
-Version 1.4.0beta52 [March 27, 2009]
- Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
- This avoids building 16-bit gamma tables unnecessarily.
- Removed fflush() from pngtest.c.
- Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
- Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt
-
-Version 1.4.0beta53 [April 1, 2009]
- Removed some remaining MMX macros from pngpriv.h
- Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)
-
-Version 1.4.0beta54 [April 13, 2009]
- Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow
- application code writers to bypass the check for multiple inclusion
- of setjmp.h when they know that it is safe to ignore the situation.
- Eliminated internal use of setjmp() in pngread.c and pngwrite.c
- Reordered ancillary chunks in pngtest.png to be the same as what
- pngtest now produces, and made some cosmetic changes to pngtest output.
- Eliminated deprecated png_read_init_3() and png_write_init_3() functions.
-
-Version 1.4.0beta55 [April 15, 2009]
- Simplified error handling in pngread.c and pngwrite.c by putting
- the new png_read_cleanup() and png_write_cleanup() functions inline.
-
-Version 1.4.0beta56 [April 25, 2009]
- Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress
- "shadowed declaration" warning from gcc-4.3.3.
- Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"
- warning about a global "gamma" variable in math.h on some platforms.
-
-Version 1.4.0beta57 [May 2, 2009]
- Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
- but was never defined (again).
- Rebuilt configure scripts with autoconf-2.63 instead of 2.62
- Removed pngprefs.h and MMX from makefiles
-
-Version 1.4.0beta58 [May 14, 2009]
- Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced
- in beta57).
- Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
-
-Version 1.4.0beta59 [May 15, 2009]
- Reformated sources in libpng style (3-space intentation, comment format)
- Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)
- Added sections about the git repository and our coding style to the
- documentation
- Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.
-
-Version 1.4.0beta60 [May 19, 2009]
- Conditionally compile png_read_finish_row() which is not used by
- progressive readers.
- Added contrib/pngminim/preader to demonstrate building minimal progressive
- decoder, based on contrib/gregbook with embedded libpng and zlib.
-
-Version 1.4.0beta61 [May 20, 2009]
- In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there
- is only one makefile in those directories, and revised the README files
- accordingly.
- More reformatting of comments, mostly to capitalize sentences.
-
-Version 1.4.0beta62 [June 2, 2009]
- Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
- and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
- Reformatted several remaining "else statement" into two lines.
- Added a section to the libpng documentation about using png_get_io_ptr()
- in configure scripts to detect the presence of libpng.
-
-Version 1.4.0beta63 [June 15, 2009]
- Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
- multiple times and to specify the sample order in the tRNS chunk,
- because the ISO PNG specification has a typo in the tRNS table.
- Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
- PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
- available for ignoring known chunks even when not saving unknown chunks.
- Adopted preference for consistent use of "#ifdef" and "#ifndef" versus
- "#if defined()" and "if !defined()" where possible.
-
-Version 1.4.0beta64 [June 24, 2009]
- Eliminated PNG_LEGACY_SUPPORTED code.
- Moved the various unknown chunk macro definitions outside of the
- PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
-
-Version 1.4.0beta65 [June 26, 2009]
- Added a reference to the libpng license in each file.
-
-Version 1.4.0beta66 [June 27, 2009]
- Refer to the libpng license instead of the libpng license in each file.
-
-Version 1.4.0beta67 [July 6, 2009]
- Relocated INVERT_ALPHA within png_read_png() and png_write_png().
- Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.
- Added an "xcode" project to the projects directory (Alam Arias).
-
-Version 1.4.0beta68 [July 19, 2009]
- Avoid some tests in filter selection in pngwutil.c
-
-Version 1.4.0beta69 [July 25, 2009]
- Simplified the new filter-selection test. This runs faster in the
- common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases.
- Removed extraneous declaration from the new call to png_read_gray_to_rgb()
- (bug introduced in libpng-1.4.0beta67).
- Fixed up xcode project (Alam Arias)
- Added a prototype for png_64bit_product() in png.c
-
-Version 1.4.0beta70 [July 27, 2009]
- Avoid a possible NULL dereference in debug build, in png_set_text_2().
- (bug introduced in libpng-0.95, discovered by Evan Rouault)
-
-Version 1.4.0beta71 [July 29, 2009]
- Rebuilt configure scripts with autoconf-2.64.
-
-Version 1.4.0beta72 [August 1, 2009]
- Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec
- from <http://tukaani.org/xz>.
-
-Version 1.4.0beta73 [August 1, 2009]
- Reject attempt to write iCCP chunk with negative embedded profile length
- (JD Chen)
-
-Version 1.4.0beta74 [August 8, 2009]
- Changed png_ptr and info_ptr member "trans" to "trans_alpha".
-
-Version 1.4.0beta75 [August 21, 2009]
- Removed an extra png_debug() recently added to png_write_find_filter().
- Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
-
-Version 1.4.0beta76 [August 22, 2009]
- Moved an incorrectly located test in png_read_row() in pngread.c
-
-Version 1.4.0beta77 [August 27, 2009]
- Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt,
- and the "noconfig" files from the distribution.
- Moved CMakeLists.txt from scripts into the main libpng directory.
- Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
-
-Version 1.4.0beta78 [August 31, 2009]
- Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
- Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros.
- Use png_malloc plus a loop instead of png_calloc() to initialize
- row_pointers in png_read_png().
-
-Version 1.4.0beta79 [September 1, 2009]
- Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays.
- Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc().
-
-Version 1.4.0beta80 [September 17, 2009]
- Removed scripts/libpng.icc
- Changed typecast of filler from png_byte to png_uint_16 in png_set_filler().
- (Dennis Gustafsson)
- Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ")
-
-Version 1.4.0beta81 [September 23, 2009]
- Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h
- Expanded TAB characters in pngrtran.c
- Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid
- compiler complaints about doubly declaring things "const".
- Changed all "#if [!]defined(X)" to "if[n]def X" where possible.
- Eliminated unused png_ptr->row_buf_size
-
-Version 1.4.0beta82 [September 25, 2009]
- Moved redundant IHDR checking into new png_check_IHDR() in png.c
- and report all errors found in the IHDR data.
- Eliminated useless call to png_check_cHRM() from pngset.c
-
-Version 1.4.0beta83 [September 25, 2009]
- Revised png_check_IHDR() to eliminate bogus complaint about filter_type.
-
-Version 1.4.0beta84 [September 30, 2009]
- Fixed some inconsistent indentation in pngconf.h
- Revised png_check_IHDR() to add a test for width variable less than 32-bit.
-
-Version 1.4.0beta85 [October 1, 2009]
- Revised png_check_IHDR() again, to check info_ptr members instead of
- the contents of the returned parameters.
-
-Version 1.4.0beta86 [October 9, 2009]
- Updated the "xcode" project (Alam Arias).
- Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
-
-Version 1.4.0rc01 [October 19, 2009]
- Trivial cosmetic changes.
-
-Version 1.4.0beta87 [October 30, 2009]
- Moved version 1.4.0 back into beta.
-
-Version 1.4.0beta88 [October 30, 2009]
- Revised libpng*.txt section about differences between 1.2.x and 1.4.0
- because most of the new features have now been ported back to 1.2.41
-
-Version 1.4.0beta89 [November 1, 2009]
- More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
- Removed a harmless extra png_set_invert_alpha() from pngwrite.c
- Apply png_user_chunk_cache_max within png_decompress_chunk().
- Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.
-
-Version 1.4.0beta90 [November 2, 2009]
- Removed all remaining WIN32_WCE #ifdefs except those involving the
- time.h "tm" structure
-
-Version 1.4.0beta91 [November 3, 2009]
- Updated scripts/pngw32.def and projects/wince/png32ce.def
- Copied projects/wince/png32ce.def to the scripts directory.
- Added scripts/makefile.wce
- Patched ltmain.sh for wince support.
- Added PNG_CONVERT_tIME_SUPPORTED macro.
-
-Version 1.4.0beta92 [November 4, 2009]
- Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
- Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED
- Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead
- of differences from 1.2.41 to 1.4.0)
-
-Version 1.4.0beta93 [November 7, 2009]
- Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and
- PNG_ALLOCATED macros to detect deprecated direct access to the
- png_struct or info_struct members and other deprecated usage in
- applications (John Bowler).
- Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS,
- to prevent warnings about direct access to png structs by libpng
- functions while building libpng. They need to be tested, especially
- those using compilers other than gcc.
- Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG".
- They should work but still need to be updated to remove
- references to pnggccrd.c or pngvcrd.c and ASM building.
- Added README.txt to the beos, cbuilder5, netware, and xcode projects warning
- that they need to be updated, to remove references to pnggccrd.c and
- pngvcrd.c and to depend on pngpriv.h
- Removed three direct references to read_info_ptr members in pngtest.c
- that were detected by the new PNG_DEPSTRUCT macro.
- Moved the png_debug macro definitions and the png_read_destroy(),
- png_write_destroy() and png_far_to_near() prototypes from png.h
- to pngpriv.h (John Bowler)
- Moved the synopsis lines for png_read_destroy(), png_write_destroy()
- png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3.
-
-Version 1.4.0beta94 [November 9, 2009]
- Removed the obsolete, unused pnggccrd.c and pngvcrd.c files.
- Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
- Removed dependency of pngtest.o on pngpriv.h in the makefiles.
- Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
-
-Version 1.4.0beta95 [November 10, 2009]
- Changed png_check_sig() to !png_sig_cmp() in contrib programs.
- Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile
- Changed png_check_sig() to !png_sig_cmp() in contrib programs.
- Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
- Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c
- Added dependency on pngpriv.h in contrib/pngminim/*/makefile
-
-Version 1.4.0beta96 [November 12, 2009]
- Renamed scripts/makefile.wce to scripts/makefile.cegcc
- Revised Makefile.am to use libpng.sys while building libpng.so
- so that only PNG_EXPORT functions are exported.
- Removed the deprecated png_check_sig() function/macro.
- Removed recently removed function names from scripts/*.def
- Revised pngtest.png to put chunks in the same order written by pngtest
- (evidently the same change made in libpng-1.0beta54 was lost).
- Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
-
-Version 1.4.0beta97 [November 13, 2009]
- Restored pngtest.png to the libpng-1.4.0beta7 version.
- Removed projects/beos and netware.txt; no one seems to be supporting them.
- Revised Makefile.in
-
-Version 1.4.0beta98 [November 13, 2009]
- Added the "xcode" project to zip distributions,
- Fixed a typo in scripts/pngwin.def introduced in beta97.
-
-Version 1.4.0beta99 [November 14, 2009]
- Moved libpng-config.in and libpng.pc-configure.in out of the scripts
- directory, to libpng-config.in and libpng-pc.in, respectively, and
- modified Makefile.am and configure.ac accordingly. Now "configure"
- needs nothing from the "scripts" directory.
- Avoid redefining PNG_CONST in pngconf.h
-
-Version 1.4.0beta100 [November 14, 2009]
- Removed ASM builds from projects/visualc6 and projects/visualc71
- Removed scripts/makefile.nommx and makefile.vcawin32
- Revised CMakeLists.txt to account for new location of libpng-config.in
- and libpng-pc.in
- Updated INSTALL to reflect removal and relocation of files.
-
-Version 1.4.0beta101 [November 14, 2009]
- Restored the binary files (*.jpg, *.png, some project files) that were
- accidentally deleted from the zip and 7z distributions when the xcode
- project was added.
-
-Version 1.4.0beta102 [November 18, 2009]
- Added libpng-config.in and libpng-pc.in to the zip and 7z distributions.
- Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100.
- Moved descriptions of makefiles and other scripts out of INSTALL into
- scripts/README.txt
- Updated the copyright year in scripts/pngwin.rc from 2006 to 2009.
-
-Version 1.4.0beta103 [November 21, 2009]
- Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt
- Align row_buf on 16-byte boundary in memory.
- Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call
- to png_flush() after png_write_IEND(). See 1.4.0beta32, 1.4.0beta50
- changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES. Someone
- needs this feature.
- Make the 'png_jmpbuf' macro expand to a call that records the correct
- longjmp function as well as returning a pointer to the setjmp
- jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
- (John Bowler)
-
-Version 1.4.0beta104 [November 22, 2009]
- Removed png_longjmp_ptr from scripts/*.def and libpng.3
- Rebuilt configure scripts with autoconf-2.65
-
-Version 1.4.0beta105 [November 25, 2009]
- Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535()
- to accomplish alpha premultiplication when
- PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined.
- Changed "/255" to "/255.0" in background calculations to make it clear
- that the 255 is used as a double.
-
-Version 1.4.0beta106 [November 27, 2009]
- Removed premultiplied alpha feature.
-
-Version 1.4.0beta107 [December 4, 2009]
- Updated README
- Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
- Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
- Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
- to put png.h and pngconf.h in $prefix/include, like the other scripts,
- instead of in $prefix/include/libpng. Also revised makefile.sco
- to put them in $prefix/include/libpng15 instead of in
- $prefix/include/libpng/libpng15.
-
-Version 1.4.0beta108 [December 11, 2009]
- Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
- Relocated png_do_chop() to its original position in pngrtran.c; the
- change in version 1.2.41beta08 caused transparency to be handled wrong
- in some 16-bit datastreams (Yusaku Sugai).
-
-Version 1.4.0beta109 [December 13, 2009]
- Added "bit_depth" parameter to the private png_build_gamma_table() function.
- Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the
- PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit
- tables.
-
-Version 1.4.0rc02 [December 20, 2009]
- Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c
-
-Version 1.4.0rc03 [December 22, 2009]
- Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
- (revising the change in 1.4.0beta99)
-
-Version 1.4.0rc04 [December 25, 2009]
- Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- in pngset.c to be consistent with other changes in version 1.2.38.
-
-Version 1.4.0rc05 [December 25, 2009]
- Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and
- Makefile.in to be consistent with changes in libpng-1.4.0rc03
-
-Version 1.4.0rc06 [December 29, 2009]
- Reverted the gamma_table changes from libpng-1.4.0beta109.
- Fixed some indentation errors.
-
-Version 1.4.0rc07 [January 1, 2010]
- Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences.
- Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c
- Update copyright year to 2010.
-
-Version 1.4.0rc08 [January 2, 2010]
- Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr
- in pngtest.c
-
-Version 1.4.0 [January 3, 2010]
- No changes.
-
-Version 1.4.1beta01 [January 8, 2010]
- Updated CMakeLists.txt for consistent indentation and to avoid an
- unclosed if-statement warning (Philip Lowman).
- Revised Makefile.am and Makefile.in to remove references to Y2KINFO,
- KNOWNBUG, and libpng.la (Robert Schwebel).
- Revised the makefiles to install the same files and symbolic
- links as configure, except for libpng.la and libpng14.la.
- Make png_set|get_compression_buffer_size() available even when
- PNG_WRITE_SUPPORTED is not enabled.
- Revised Makefile.am and Makefile.in to simplify their maintenance.
- Revised scripts/makefile.linux to install a link to libpng14.so.14.1
-
-Version 1.4.1beta02 [January 9, 2010]
- Revised the rest of the makefiles to install a link to libpng14.so.14.1
-
-Version 1.4.1beta03 [January 10, 2010]
- Removed png_set_premultiply_alpha() from scripts/*.def
-
-Version 1.4.1rc01 [January 16, 2010]
- No changes.
-
-Version 1.4.1beta04 [January 23, 2010]
- Revised png_decompress_chunk() to improve speed and memory usage when
- decoding large chunks.
- Added png_set|get_chunk_malloc_max() functions.
-
-Version 1.4.1beta05 [January 26, 2010]
- Relocated "int k" declaration in pngtest.c to minimize its scope.
-
-Version 1.4.1beta06 [January 28, 2010]
- Revised png_decompress_chunk() to use a two-pass method suggested by
- John Bowler.
-
-Version 1.4.1beta07 [February 6, 2010]
- Folded some long lines in the source files.
- Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,
- and a PNG_USER_LIMITS_SUPPORTED flag.
- Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as
- png_ptr->png_user_chunk_malloc_max.
- Revised png_push_save_buffer() to do fewer but larger png_malloc() calls.
-
-Version 1.4.1beta08 [February 6, 2010]
- Minor cleanup and updating of dates and copyright year.
-
-Version 1.5.0beta01 [February 7, 2010]
- Moved declaration of png_struct into private pngstruct.h and png_info
- into pnginfo.h
-
-Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010]
- Reverted to original png_push_save_buffer() code.
-
-Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010]
- Return allocated "old_buffer" in png_push_save_buffer() before
- calling png_error(), to avoid a potential memory leak.
- Updated configure script to use SO number 15.
-
-Version 1.5.0beta04 [February 9, 2010]
- Removed malformed "incomplete struct declaration" of png_info from png.h
-
-Version 1.5.0beta05 [February 12, 2010]
- Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the
- linewrapping that it entailed.
- Revised comments in pngstruct.h and pnginfo.h and added pointers to
- the libpng license.
- Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES
- Removed the cbuilder5 project, which has not been updated to 1.4.0.
-
-Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]
- Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke
- Nishikawa)
-
-Version 1.5.0beta07 [omitted]
-
-Version 1.5.0beta08 [February 19, 2010]
- Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED
- wherever png_snprintf() is used to construct error and warning messages.
- Noted in scripts/makefile.mingw that it expects to be run under MSYS.
- Removed obsolete unused MMX-querying support from contrib/gregbook
- Added exported png_longjmp() function.
- Removed the AIX redefinition of jmpbuf in png.h
- Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt
- when building on AIX.
-
-Version 1.5.0beta09 [February 19, 2010]
- Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.
- Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h
-
-Version 1.5.0beta10 [February 25, 2010]
- Removed unused gzio.c from contrib/pngminim gather and makefile scripts
- Removed replacement error handlers from contrib/gregbook. Because of
- the new png_longjmp() function they are no longer needed.
-
-Version 1.5.0beta11 [March 6, 2010]
- Removed checking for already-included setjmp.h from pngconf.h
- Fixed inconsistent indentations and made numerous cosmetic changes.
- Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
-
-Version 1.5.0beta12 [March 9, 2010]
- Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from
- the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES"
- and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler).
- Created new pngdebug.h and moved debug definitions there.
-
-Version 1.5.0beta13 [March 10, 2010]
- Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
- Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
- PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
- is defined.
- Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
- Moved the 'config.h' support from pngconf.h to pngpriv.h
- Removed PNGAPI from the png_longjmp_ptr typedef.
- Eliminated dependence of pngtest.c on the private pngdebug.h file.
- Make all png_debug macros into *unterminated* statements or
- expressions (i.e. a trailing ';' must always be added) and correct
- the format statements in various png_debug messages.
-
-Version 1.5.0beta14 [March 14, 2010]
- Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
- Revised Makefile.am to account for recent additions and replacements.
- Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and
- added ordinal numbers to the Windows DEF file and corrected the duplicated
- ordinal numbers on CE symbols that are commented out.
- Added back in export symbols that can be present in the Windows build but
- are disabled by default.
- PNG_EXPORT changed to include an 'ordinal' field for DEF file generation.
- PNG_CALLBACK added to make callback definitions uniform. PNGAPI split
- into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks),
- and appropriate changes made to all files. Cygwin builds re-hinged to
- allow procedure call standard changes and to remove the need for the DEF
- file (fixes build on Cygwin).
- Enabled 'attribute' warnings that are relevant to library APIs and callbacks.
- Changed rules for generation of the various symbol files and added a new
- rule for a DEF file (which is also added to the distribution).
- Updated the symbol file generation to stop it adding spurious spaces
- to EOL (coming from preprocessor macro expansion). Added a facility
- to join tokens in the output and rewrite *.dfn to use this.
- Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71
- and removed scripts/makefile.cygwin.
- Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built.
- Removed the include of sys/types.h - apparently unnecessary now on the
- platforms on which it happened (all but Mac OS and RISC OS).
- Moved the Mac OS test into pngpriv.h (the only place it is used.)
-
-Version 1.5.0beta15 [March 17, 2010]
- Added symbols.chk target to Makefile.am to validate the symbols in png.h
- against the new DEF file scripts/symbols.def.
- Changed the default DEF file back to pngwin.def.
- Removed makefile.mingw.
- Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
-
-Version 1.5.0beta16 [April 1, 2010]
- Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that
- fields are initialized in all configurations. The READ/WRITE
- macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as
- before to disable code to actually read or write iTXt chunks
- and iTXt_SUPPORTED can be used to detect presence of either
- read or write support (but it is probably better to check for
- the one actually required - read or write.)
- Combined multiple png_warning() calls for a single error.
- Restored the macro definition of png_check_sig().
-
-Version 1.5.0beta17 [April 17, 2010]
- Added some "(long)" typecasts to printf calls in png_handle_cHRM().
- Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
- Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
- more accurately what it actually does. At the same time, renamed
- the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
- PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
- Added some "(long)" typecasts to printf calls in png_handle_cHRM().
- Freeze build-time only configuration in the build.
- In all prior versions of libpng most configuration options
- controlled by compiler #defines had to be repeated by the
- application code that used libpng. This patch changes this
- so that compilation options that can only be changed at build
- time are frozen in the build. Options that are compiler
- dependent (and those that are system dependent) are evaluated
- each time - pngconf.h holds these. Options that can be changed
- per-file in the application are in png.h. Frozen options are
- in the new installed header file pnglibconf.h (John Bowler)
- Removed the xcode project because it has not been updated to work
- with libpng-1.5.0.
- Removed the ability to include optional pngusr.h
-
-Version 1.5.0beta18 [April 17, 2010]
- Restored the ability to include optional pngusr.h
- Moved replacements for png_error() and png_warning() from the
- contrib/pngminim project to pngerror.c, for use when warnings or
- errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
- storing unneeded error/warning text.
- Updated contrib/pngminim project to work with the new pnglibconf.h
- Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
-
-Version 1.5.0beta19 [April 24, 2010]
- Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions
- to read and write ints to be disabled independently of PNG_USE_READ_MACROS,
- which allows libpng to be built with the functions even though the default
- is to use the macros - this allows applications to choose at app build
- time whether or not to use macros (previously impossible because the
- functions weren't in the default build.)
- Changed Windows calling convention back to __cdecl for API functions.
- For Windows/x86 platforms only:
- __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses
- __cdecl throughout (both API functions and callbacks) on Windows/x86
- platforms.
- Replaced visualc6 and visualc71 projects with new vstudio project
- Relaxed the overly-restrictive permissions of some files.
-
-Version 1.5.0beta20 [April 24, 2010]
- Relaxed more overly-restrictive permissions of some files.
-
-Version 1.5.0beta21 [April 27, 2010]
- Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new
- vstudio project files, and some trivial editing of some files in the
- scripts directory.
- Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in
- contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
-
-Version 1.5.0beta22 [April 28, 2010]
- Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS
- because it has a macro equivalent.
- Improved the options.awk script; added an "everything off" option.
- Revised contrib/pngminim to use the "everything off" option in pngusr.dfa.
-
-Version 1.5.0beta23 [April 29, 2010]
- Corrected PNG_REMOVED macro to take five arguments.
- The macro was documented with two arguments (name,ordinal), however
- the symbol checking .dfn files assumed five arguments. The five
- argument form seems more useful so it is changed to that.
- Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- in gregbook/readpng2.c
- Corrected protection of png_get_user_transform_ptr. The API declaration in
- png.h is removed if both READ and WRITE USER_TRANSFORM are turned off
- but was left defined in pngtrans.c
- Added logunsupported=1 to cause pnglibconf.h to document disabled options.
- This makes the installed pnglibconf.h more readable but causes no
- other change. The intention is that users of libpng will find it
- easier to understand if an API they need is missing.
- Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
- Removed dummy_inflate.c from contrib/pngminim/encoder
- Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile.
-
-Version 1.5.0beta24 [May 7, 2010]
- Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the
- offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.
- Added more blank lines for readability.
-
-Version 1.5.0beta25 [June 18, 2010]
- In pngpread.c: png_push_have_row() add check for new_row > height
- Removed the now-redundant check for out-of-bounds new_row from example.c
-
-Version 1.5.0beta26 [June 18, 2010]
- In pngpread.c: png_push_process_row() add check for too many rows.
-
-Version 1.5.0beta27 [June 18, 2010]
- Removed the check added in beta25 as it is now redundant.
-
-Version 1.5.0beta28 [June 20, 2010]
- Rewrote png_process_IDAT_data to consistently treat extra data as warnings
- and handle end conditions more cleanly.
- Removed the new (beta26) check in png_push_process_row().
-
-Version 1.5.0beta29 [June 21, 2010]
- Revised scripts/options.awk to work on Sunos (but still doesn't work)
- Added comment to options.awk and contrib/pngminim/*/makefile to try nawk.
-
-Version 1.5.0beta30 [June 22, 2010]
- Stop memory leak when reading a malformed sCAL chunk.
-
-Version 1.5.0beta31 [June 26, 2010]
- Revised pngpread.c patch of beta28 to avoid an endless loop.
- Removed some trailing blanks.
-
-Version 1.5.0beta32 [June 26, 2010]
- Removed leftover scripts/options.patch and scripts/options.rej
-
-Version 1.5.0beta33 [July 6, 3010]
- Made FIXED and FLOATING options consistent in the APIs they enable and
- disable. Corrected scripts/options.awk to handle both command line
- options and options specified in the .dfa files.
- Changed char *msg to PNG_CONST char *msg in pngrutil.c
- Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or
- floating point APIs, but not both.
- Reversed patch to remove error handler when the jmp_buf is stored in the
- main program structure, not the png_struct.
- The error handler is needed because the default handler in libpng will
- always use the jmp_buf in the library control structure; this is never
- set. The gregbook code is a useful example because, even though it
- uses setjmp/longjmp, it shows how error handling can be implemented
- using control mechanisms not directly supported by libpng. The
- technique will work correctly with mechanisms such as Microsoft
- Structure Exceptions or C++ exceptions (compiler willing - note that gcc
- does not by default support interworking of C and C++ error handling.)
- Reverted changes to call png_longjmp in contrib/gregbook where it is not
- appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp
- cannot be used.
- Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)
- Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')
-
-Version 1.5.0beta34 [July 12, 2010]
- Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h
-
-Version 1.5.0beta35 [July 24, 2010]
- Removed some newly-added TAB characters.
- Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
- Moved the definition of png_snprintf() outside of the enclosing
- #ifdef blocks in pngconf.h
-
-Version 1.5.0beta36 [July 29, 2010]
- Patches by John Bowler:
- Fixed point APIs are now supported throughout (no missing APIs).
- Internal fixed point arithmetic support exists for all internal floating
- point operations.
- sCAL validates the floating point strings it is passed.
- Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2
- Two new APIs exist to get the number of passes without turning on the
- PNG_INTERLACE transform and to get the number of rows in the current
- pass.
- A new test program, pngvalid.c, validates the gamma code.
- Errors in the 16 bit gamma correction (overflows) have been corrected.
- cHRM chunk testing is done consistently (previously the floating point
- API bypassed it, because the test really didn't work on FP, now the test
- is performed on the actual values to be stored in the PNG file so it
- works in the FP case too.)
- Most floating point APIs now simply call the fixed point APIs after
- converting the values to the fixed point form used in the PNG file.
- The standard headers no longer include zlib.h, which is currently only
- required for pngstruct.h and can therefore be internal.
- Revised png_get_int_32 to undo the PNG two's complement representation of
- negative numbers.
-
-Version 1.5.0beta37 [July 30, 2010]
- Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid
- a compiler warning.
- Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
-
-Version 1.5.0beta38 [July 31, 2010]
- Implemented remaining "_fixed" functions.
- Corrected a number of recently introduced warnings mostly resulting from
- safe but uncast assignments to shorter integers. Also added a zlib
- VStudio release library project because the latest zlib Official Windows
- build does not include such a thing.
- Revised png_get_int_16() to be similar to png_get_int_32().
- Restored projects/visualc71.
-
-Version 1.5.0beta39 [August 2, 2010]
- VisualC/GCC warning fixes, VisualC build fixes
- The changes include support for function attributes in VC in addition to
- those already present in GCC - necessary because without these some
- warnings are unavoidable. Fixes include signed/unsigned fixes in
- pngvalid and checks with gcc -Wall -Wextra -Wunused.
- VC requires function attributes on function definitions as well as
- declarations, PNG_FUNCTION has been added to enable this and the
- relevant function definitions changed.
-
-Version 1.5.0beta40 [August 6, 2010]
- Correct use of _WINDOWS_ in pngconf.h
- Removed png_mem_ #defines; they are no longer used.
- Added the sRGB chunk to pngtest.png
-
-Version 1.5.0beta41 [August 11, 2010]
- Added the cHRM chunk to pngtest.png
- Don't try to use version-script with cygwin/mingw.
- Revised contrib/gregbook to work under cygwin/mingw.
-
-Version 1.5.0beta42 [August 18, 2010]
- Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
- Made all API functions that have const arguments and constant string
- literal pointers declare them (John Bowler).
-
-Version 1.5.0beta43 [August 20, 2010]
- Removed spurious tabs, shorten long lines (no source change)
- Also added scripts/chkfmt to validate the format of all the files that can
- reasonably be validated (it is suggested to run "make distclean" before
- checking, because some machine generated files have long lines.)
- Reformatted the CHANGES file to be more consistent throughout.
- Made changes to address various issues identified by GCC, mostly
- signed/unsigned and shortening problems on assignment but also a few
- difficult to optimize (for GCC) loops.
- Fixed non-GCC fixed point builds. In png.c a declaration was misplaced
- in an earlier update. Fixed to declare the auto variables at the head.
- Use cexcept.h in pngvalid.c.
-
-Version 1.5.0beta44 [August 24, 2010]
- Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
- installing libpng in /usr/lib64 (Funda Wang).
- Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
- Revised CMakeLists.txt to make symlinks instead of copies when installing.
- Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)
- Implemented memory checks within pngvalid
- Reformatted/rearranged pngvalid.c to assist use of progressive reader.
- Check interlaced images in pngvalid
- Clarified pngusr.h comments in pnglibconf.dfa
- Simplified the pngvalid error-handling code now that cexcept.h is in place.
- Implemented progressive reader in pngvalid.c for standard tests
- Implemented progressive read in pngvalid.c gamma tests
- Turn on progressive reader in pngvalid.c by default and tidy code.
-
-Version 1.5.0beta45 [August 26, 2010]
- Added an explicit make step to projects/vstudio for pnglibconf.h
- Also corrected zlib.vcxproj into which Visual Studio had introduced
- what it calls an "authoring error". The change to make pnglibconf.h
- simply copies the file; in the future it may actually generate the
- file from scripts/pnglibconf.dfa as the other build systems do.
- Changed pngvalid to work when floating point APIs are disabled
- Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt
- Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX
- in pngpriv.h in case the user neglected to define them in their pngusr.h
-
-Version 1.5.0beta46 [August 28, 2010]
- Added new private header files to libpng_sources in CMakeLists.txt
- Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options.
- Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project.
-
-Version 1.5.0beta47 [September 11, 2010]
- Fixed a number of problems with 64-bit compilation reported by Visual
- Studio 2010 (John Bowler).
-
-Version 1.5.0beta48 [October 4, 2010]
- Updated CMakeLists.txt (Philip Lowman).
- Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
- $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
- Fixed problem with symbols creation in Makefile.am which was assuming that
- all versions of ccp write to standard output by default (Martin Banky). The
- bug was introduced in libpng-1.2.9beta5.
- Removed unused mkinstalldirs.
-
-Version 1.5.0beta49 [October 8, 2010]
- Undid Makefile.am revision of 1.5.0beta48.
-
-Version 1.5.0beta50 [October 14, 2010]
- Revised Makefile.in to account for mkinstalldirs being removed.
- Added some "(unsigned long)" typecasts in printf statements in pngvalid.c.
- Suppressed a compiler warning in png_handle_sPLT().
- Check for out-of-range text compression mode in png_set_text().
-
-Version 1.5.0beta51 [October 15, 2010]
- Changed embedded dates to "(PENDING RELEASE) in beta releases (and future
- rc releases) to minimize the difference between releases.
-
-Version 1.5.0beta52 [October 16, 2010]
- Restored some of the embedded dates (in png.h, png.c, documentation, etc.)
-
-Version 1.5.0beta53 [October 18, 2010]
- Updated INSTALL to mention using "make maintainer-clean" and to remove
- obsolete statement about a custom ltmain.sh
- Disabled "color-tests" by default in Makefile.am so it will work with
- automake versions earlier than 1.11.1
- Use document name "libpng-manual.txt" instead of "libpng-<version>.txt"
- to simplify version differences.
- Removed obsolete remarks about setjmp handling from INSTALL.
- Revised and renamed the typedef in png.h and png.c that was designed
- to catch library and header mismatch.
-
-Version 1.5.0beta54 [November 10, 2010]
- Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.
- Used a consistent structure for the pngget.c functions.
-
-Version 1.5.0beta55 [November 21, 2010]
- Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
- Moved reading of file signature into png_read_sig (Cosmin)
- Fixed atomicity of chunk header serialization (Cosmin)
- Added test for io_state in pngtest.c (Cosmin)
- Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.
- Changes to remove gcc warnings (John Bowler)
- Certain optional gcc warning flags resulted in warnings in libpng code.
- With these changes only -Wconversion and -Wcast-qual cannot be turned on.
- Changes are trivial rearrangements of code. -Wconversion is not possible
- for pngrutil.c (because of the widespread use of += et al on variables
- smaller than (int) or (unsigned int)) and -Wcast-qual is not possible
- with pngwio.c and pngwutil.c because the 'write' callback and zlib
- compression both fail to declare their input buffers with 'const'.
-
-Version 1.5.0beta56 [December 7, 2010]
- Added the private PNG_UNUSED() macro definition in pngpriv.h.
- Added some commentary about PNG_EXPORT in png.h and pngconf.h
- Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the
- objective of simplifying and improving the cosmetic appearance of png.h.
- Fixed some incorrect "=" macro names in pnglibconf.dfa
- Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt
-
-Version 1.5.0beta57 [December 9, 2010]
- Documented the pngvalid gamma error summary with additional comments and
- print statements.
- Improved missing symbol handling in checksym.awk; symbols missing in both
- the old and new files can now be optionally ignored, treated as errors
- or warnings.
- Removed references to pngvcrd.c and pnggccrd.c from the vstudio project.
- Updated "libpng14" to "libpng15" in the visualc71 project.
- Enabled the strip16 tests in pngvalid.`
- Don't display test results (except PASS/FAIL) when running "make test".
- Instead put them in pngtest-log.txt
- Added "--with-zprefix=<string>" to configure.ac
- Updated the prebuilt configuration files to autoconf version 2.68
-
-Version 1.5.0beta58 [December 19, 2010]
- Fixed interlace image handling and add test cases (John Bowler)
- Fixed the clean rule in Makefile.am to remove pngtest-log.txt
- Made minor changes to work around warnings in gcc 3.4
-
-Version 1.5.0rc01 [December 27, 2010]
- No changes.
-
-Version 1.5.0rc02 [December 27, 2010]
- Eliminated references to the scripts/*.def files in project/visualc71.
-
-Version 1.5.0rc03 [December 28, 2010]
- Eliminated scripts/*.def and revised Makefile.am accordingly
-
-Version 1.5.0rc04 [December 29, 2010]
- Fixed bug in background transformation handling in pngrtran.c (it was
- looking for the flag in png_ptr->transformations instead of in
- png_ptr->flags) (David Raymond).
-
-Version 1.5.0rc05 [December 31, 2010]
- Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin)
-
-Version 1.5.0rc06 [January 4, 2011]
- Changed the new configure option "zprefix=string" to "zlib-prefix=string"
-
-Version 1.5.0rc07 [January 4, 2011]
- Updated copyright year.
-
-Version 1.5.0 [January 6, 2011]
- No changes.
-
-version 1.5.1beta01 [January 8, 2011]
- Added description of png_set_crc_action() to the manual.
- Added a note in the manual that the type of the iCCP profile was changed
- from png_charpp to png_bytepp in png_get_iCCP(). This change happened
- in version 1.5.0beta36 but is not noted in the CHANGES. Similarly,
- it was changed from png_charpp to png_const_bytepp in png_set_iCCP().
- Ensure that png_rgb_to_gray ignores palette mapped images, if libpng
- internally happens to call it with one.
- Fixed a failure to handle palette mapped images correctly.
-
-Version 1.5.1beta02 [January 14, 2011]
- Fixed a bug in handling of interlaced images (bero at arklinux.org).
- Updated CMakeLists.txt (Clifford Yapp)
-
-Version 1.5.1beta03 [January 14, 2011]
- Fixed typecasting of some png_debug() statements (Cosmin)
-
-Version 1.5.1beta04 [January 16, 2011]
- Updated documentation of png_set|get_tRNS() (Thomas Klausner).
- Mentioned in the documentation that applications must #include "zlib.h"
- if they need access to anything in zlib.h, and that a number of
- macros such as png_memset() are no longer accessible by applications.
- Corrected pngvalid gamma test "sample" function to access all of the color
- samples of each pixel, instead of sampling the red channel three times.
- Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow"
- warnings, and (mistakenly) changed png_exp() to exp().
-
-Version 1.5.1beta05 [January 16, 2011]
- Changed variable names png_index, png_div, png_exp, and png_gamma to
- char_index, divisor, exp_b10, and gamma_val, respectively, and
- changed exp() back to png_exp().
-
-Version 1.5.1beta06 [January 20, 2011]
- Prevent png_push_crc_skip() from hanging while reading an unknown chunk
- or an over-large compressed zTXt chunk with the progressive reader.
- Eliminated more GCC "shadow" warnings.
- Revised png_fixed() in png.c to avoid compiler warning about reaching the
- end without returning anything.
-
-Version 1.5.1beta07 [January 22, 2011]
- In the manual, describe the png_get_IHDR() arguments in the correct order.
- Added const_png_structp and const_png_infop types, and used them in
- prototypes for most png_get_*() functions.
-
-Version 1.5.1beta08 [January 23, 2011]
- Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name()
- Added synopses for the IO_STATE functions and other missing synopses
- to the manual. Removed the synopses from libpngpf.3 because they
- were out of date and no longer useful. Better information can be
- obtained by reading the prototypes and comments in pngpriv.h
- Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build
- Added a make macro DFNCPP that is a CPP that will accept the tokens in
- a .dfn file and adds configure stuff to test for such a CPP. ./configure
- should fail if one is not available.
- Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace.
- Added png_get_current_row_number and png_get_current_pass_number for the
- benefit of the user transform callback.
- Added png_process_data_pause and png_process_data_skip for the benefit of
- progressive readers that need to stop data processing or want to optimize
- skipping of unread data (e.g., if the reader marks a chunk to be skipped.)
-
-Version 1.5.1beta09 [January 24, 2011]
- Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error.
- pngvalid contains tests of transforms, which tests are currently disabled
- because they are incompletely tested. gray_to_rgb was failing to expand
- the bit depth for smaller bit depth images; this seems to be a long
- standing error and resulted, apparently, in invalid output. The
- documentation did not accurately describe what libpng really does when
- converting RGB to gray.
-
-Version 1.5.1beta10 [January 27, 2010]
- Fixed incorrect examples of callback prototypes in the manual, that were
- introduced in libpng-1.0.0.
- In addition the order of the png_get_uint macros with respect to the
- relevant function definitions has been reversed. This helps the
- preprocessing of the symbol files be more robust. Furthermore, the
- symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when
- the library may actually be built with PNG_USE_READ_MACROS; this stops
- the read macros interfering with the symbol file format.
- Made the manual, synopses, and function prototypes use the function
- argument names file_gamma, int_file_gamma, and srgb_intent consistently.
-
-Version 1.5.1beta11 [January 28, 2011]
- Changed PNG_UNUSED from "param=param;" to "{if(param){}}".
- Corrected local variable type in new API png_process_data_skip()
- The type was self-evidently incorrect but only causes problems on 64 bit
- architectures.
- Added transform tests to pngvalid and simplified the arguments.
-
-Version 1.5.1rc01 [January 29, 2011]
- No changes.
-
-Version 1.5.1rc02 [January 31, 2011]
- Added a request in the manual that applications do not use "png_" or
- "PNG_" to begin any of their own symbols.
- Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h
-
-Version 1.5.1 [February 3, 2011]
- No changes.
-
-Version 1.5.2beta01 [February 13, 2011]
- More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
- check formal parameters names in function declarations (as well as
- definitions) to see if they match a name in the global namespace.
- Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
- old VisualC++ preprocessor.
- Turned on interlace handling in png_read_png().
- Fixed gcc pendantic warnings.
- Handle longjmp in Cygwin.
- Fixed png_get_current_row_number() in the interlaced case.
- Cleaned up ALPHA flags and transformations.
- Implemented expansion to 16 bits.
-
-Version 1.5.2beta02 [February 19, 2011]
- Fixed mistake in the descriptions of user read_transform and write_transform
- function prototypes in the manual. The row_info struct is png_row_infop.
- Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior.
- Corrected png_get_current_row_number documentation
- Fixed the read/write row callback documentation.
- This documents the current behavior, where the callback is called after
- every row with information pertaining to the next row.
-
-Version 1.5.2beta03 [March 3, 2011]
- Fixed scripts/makefile.vcwin32
- Updated contrib/pngsuite/README to add the word "modify".
- Define PNG_ALLOCATED to blank when _MSC_VER<1300.
-
-Version 1.5.2rc01 [March 19, 2011]
- Define remaining attributes to blank when MSC_VER<1300.
- ifdef out mask arrays in pngread.c when interlacing is not supported.
-
-Version 1.5.2rc02 [March 22, 2011]
- Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
- and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
- from the makefiles.
- Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
- to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
-
-Version 1.5.2rc03 [March 24, 2011]
- Don't include standard header files in png.h while building the symbol table,
- to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
-
-Version 1.5.2 [March 31, 2011]
-
-Send comments/corrections/commendations to png-mng-implement at lists.sf.net
-(subscription required; visit
-https://lists.sourceforge.net/lists/listinfo/png-mng-implement
-to subscribe)
-or to glennrp at users.sourceforge.net
-
-Glenn R-P
-*/ }
-#endif
+++ /dev/null
-include_directories(${CMAKE_CURRENT_SOURCE_DIR})
-
-add_library (png_bundled STATIC
- png.c
- pngerror.c
- pngget.c
- pngmem.c
- pngpread.c
- pngread.c
- pngrio.c
- pngrtran.c
- pngrutil.c
- pngset.c
- pngtrans.c
- pngwio.c
- pngwrite.c
- pngwtran.c
- pngwutil.c
-)
-
-set_target_properties (png_bundled PROPERTIES
- COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS}"
-)
+++ /dev/null
-
-This copy of the libpng notices is provided for your convenience. In case of
-any discrepancy between this copy and the notices in the file png.h that is
-included in the libpng distribution, the latter shall prevail.
-
-COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
-
-If you modify libpng you may insert additional notices immediately following
-this sentence.
-
-This code is released under the libpng license.
-
-libpng versions 1.2.6, August 15, 2004, through 1.5.2, March 31, 2011, are
-Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
-distributed according to the same disclaimer and license as libpng-1.2.5
-with the following individual added to the list of Contributing Authors
-
- Cosmin Truta
-
-libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
-Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
-distributed according to the same disclaimer and license as libpng-1.0.6
-with the following individuals added to the list of Contributing Authors
-
- Simon-Pierre Cadieux
- Eric S. Raymond
- Gilles Vollant
-
-and with the following additions to the disclaimer:
-
- There is no warranty against interference with your enjoyment of the
- library or against infringement. There is no warranty that our
- efforts or the library will fulfill any of your particular purposes
- or needs. This library is provided with all faults, and the entire
- risk of satisfactory quality, performance, accuracy, and effort is with
- the user.
-
-libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
-Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are
-distributed according to the same disclaimer and license as libpng-0.96,
-with the following individuals added to the list of Contributing Authors:
-
- Tom Lane
- Glenn Randers-Pehrson
- Willem van Schaik
-
-libpng versions 0.89, June 1996, through 0.96, May 1997, are
-Copyright (c) 1996, 1997 Andreas Dilger
-Distributed according to the same disclaimer and license as libpng-0.88,
-with the following individuals added to the list of Contributing Authors:
-
- John Bowler
- Kevin Bracey
- Sam Bushell
- Magnus Holmgren
- Greg Roelofs
- Tom Tanner
-
-libpng versions 0.5, May 1995, through 0.88, January 1996, are
-Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
-
-For the purposes of this copyright and license, "Contributing Authors"
-is defined as the following set of individuals:
-
- Andreas Dilger
- Dave Martindale
- Guy Eric Schalnat
- Paul Schmidt
- Tim Wegner
-
-The PNG Reference Library is supplied "AS IS". The Contributing Authors
-and Group 42, Inc. disclaim all warranties, expressed or implied,
-including, without limitation, the warranties of merchantability and of
-fitness for any purpose. The Contributing Authors and Group 42, Inc.
-assume no liability for direct, indirect, incidental, special, exemplary,
-or consequential damages, which may result from the use of the PNG
-Reference Library, even if advised of the possibility of such damage.
-
-Permission is hereby granted to use, copy, modify, and distribute this
-source code, or portions hereof, for any purpose, without fee, subject
-to the following restrictions:
-
-1. The origin of this source code must not be misrepresented.
-
-2. Altered versions must be plainly marked as such and must not
- be misrepresented as being the original source.
-
-3. This Copyright notice may not be removed or altered from any
- source or altered source distribution.
-
-The Contributing Authors and Group 42, Inc. specifically permit, without
-fee, and encourage the use of this source code as a component to
-supporting the PNG file format in commercial products. If you use this
-source code in a product, acknowledgment is not required but would be
-appreciated.
-
-
-A "png_get_copyright" function is available, for convenient use in "about"
-boxes and the like:
-
- printf("%s",png_get_copyright(NULL));
-
-Also, the PNG logo (in PNG format, of course) is supplied in the
-files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
-
-Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
-certification mark of the Open Source Initiative.
-
-Glenn Randers-Pehrson
-glennrp at users.sourceforge.net
-March 31, 2011
+++ /dev/null
-README for libpng version 1.5.2 - March 31, 2011 (shared library 15.0)
-See the note about version numbers near the top of png.h
-
-See INSTALL for instructions on how to install libpng.
-
-Libpng comes in several distribution formats. Get libpng-*.tar.gz,
-libpng-*.tar.xz or libpng-*.tar.bz2 if you want UNIX-style line endings
-in the text files, or lpng*.zip if you want DOS-style line endings.
-
-Version 0.89 was the first official release of libpng. Don't let the
-fact that it's the first release fool you. The libpng library has been in
-extensive use and testing since mid-1995. By late 1997 it had
-finally gotten to the stage where there hadn't been significant
-changes to the API in some time, and people have a bad feeling about
-libraries with versions < 1.0. Version 1.0.0 was released in
-March 1998.
-
-****
-Note that some of the changes to the png_info structure render this
-version of the library binary incompatible with libpng-0.89 or
-earlier versions if you are using a shared library. The type of the
-"filler" parameter for png_set_filler() has changed from png_byte to
-png_uint_32, which will affect shared-library applications that use
-this function.
-
-To avoid problems with changes to the internals of png_info_struct,
-new APIs have been made available in 0.95 to avoid direct application
-access to info_ptr. These functions are the png_set_<chunk> and
-png_get_<chunk> functions. These functions should be used when
-accessing/storing the info_struct data, rather than manipulating it
-directly, to avoid such problems in the future.
-
-It is important to note that the APIs do not make current programs
-that access the info struct directly incompatible with the new
-library. However, it is strongly suggested that new programs use
-the new APIs (as shown in example.c and pngtest.c), and older programs
-be converted to the new format, to facilitate upgrades in the future.
-****
-
-Additions since 0.90 include the ability to compile libpng as a
-Windows DLL, and new APIs for accessing data in the info struct.
-Experimental functions include the ability to set weighting and cost
-factors for row filter selection, direct reads of integers from buffers
-on big-endian processors that support misaligned data access, faster
-methods of doing alpha composition, and more accurate 16->8 bit color
-conversion.
-
-The additions since 0.89 include the ability to read from a PNG stream
-which has had some (or all) of the signature bytes read by the calling
-application. This also allows the reading of embedded PNG streams that
-do not have the PNG file signature. As well, it is now possible to set
-the library action on the detection of chunk CRC errors. It is possible
-to set different actions based on whether the CRC error occurred in a
-critical or an ancillary chunk.
-
-The changes made to the library, and bugs fixed are based on discussions
-on the PNG-implement mailing list and not on material submitted
-privately to Guy, Andreas, or Glenn. They will forward any good
-suggestions to the list.
-
-For a detailed description on using libpng, read libpng-manual.txt. For
-examples of libpng in a program, see example.c and pngtest.c. For usage
-information and restrictions (what little they are) on libpng, see
-png.h. For a description on using zlib (the compression library used by
-libpng) and zlib's restrictions, see zlib.h
-
-I have included a general makefile, as well as several machine and
-compiler specific ones, but you may have to modify one for your own needs.
-
-You should use zlib 1.0.4 or later to run this, but it MAY work with
-versions as old as zlib 0.95. Even so, there are bugs in older zlib
-versions which can cause the output of invalid compression streams for
-some images. You will definitely need zlib 1.0.4 or later if you are
-taking advantage of the MS-DOS "far" structure allocation for the small
-and medium memory models. You should also note that zlib is a
-compression library that is useful for more things than just PNG files.
-You can use zlib as a drop-in replacement for fread() and fwrite() if
-you are so inclined.
-
-zlib should be available at the same place that libpng is, or at.
-ftp://ftp.info-zip.org/pub/infozip/zlib
-
-You may also want a copy of the PNG specification. It is available
-as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find
-these at http://www.libpng.org/pub/png/documents/
-
-This code is currently being archived at libpng.sf.net in the
-[DOWNLOAD] area, and on CompuServe, Lib 20 (PNG SUPPORT)
-at GO GRAPHSUP. If you can't find it in any of those places,
-e-mail me, and I'll help you find it.
-
-If you have any code changes, requests, problems, etc., please e-mail
-them to me. Also, I'd appreciate any make files or project files,
-and any modifications you needed to make to get libpng to compile,
-along with a #define variable to tell what compiler/system you are on.
-If you needed to add transformations to libpng, or wish libpng would
-provide the image in a different way, drop me a note (and code, if
-possible), so I can consider supporting the transformation.
-Finally, if you get any warning messages when compiling libpng
-(note: not zlib), and they are easy to fix, I'd appreciate the
-fix. Please mention "libpng" somewhere in the subject line. Thanks.
-
-This release was created and will be supported by myself (of course
-based in a large way on Guy's and Andreas' earlier work), and the PNG
-development group.
-
-Send comments/corrections/commendations to png-mng-implement at
-lists.sourceforge.net (subscription required; visit
-https://lists.sourceforge.net/lists/listinfo/png-mng-implement
-to subscribe) or to glennrp at users.sourceforge.net
-
-You can't reach Guy, the original libpng author, at the addresses
-given in previous versions of this document. He and Andreas will
-read mail addressed to the png-implement list, however.
-
-Please do not send general questions about PNG. Send them to
-the (png-list at ccrc.wustl.edu, subscription required, write to
-majordomo at ccrc.wustl.edu with "subscribe png-list" in your message).
-On the other hand,
-please do not send libpng questions to that address, send them to me
-or to the png-implement list. I'll
-get them in the end anyway. If you have a question about something
-in the PNG specification that is related to using libpng, send it
-to me. Send me any questions that start with "I was using libpng,
-and ...". If in doubt, send questions to me. I'll bounce them
-to others, if necessary.
-
-Please do not send suggestions on how to change PNG. We have
-been discussing PNG for nine years now, and it is official and
-finished. If you have suggestions for libpng, however, I'll
-gladly listen. Even if your suggestion is not used immediately,
-it may be used later.
-
-Files in this distribution:
-
- ANNOUNCE => Announcement of this version, with recent changes
- CHANGES => Description of changes between libpng versions
- KNOWNBUG => List of known bugs and deficiencies
- LICENSE => License to use and redistribute libpng
- README => This file
- TODO => Things not implemented in the current library
- Y2KINFO => Statement of Y2K compliance
- example.c => Example code for using libpng functions
- libpng.3 => manual page for libpng (includes libpng-manual.txt)
- libpng-manual.txt => Description of libpng and its functions
- libpngpf.3 => manual page for libpng's private functions
- png.5 => manual page for the PNG format
- png.c => Basic interface functions common to library
- png.h => Library function and interface declarations (public)
- pngpriv.h => Library function and interface declarations (private)
- pngconf.h => System specific library configuration (public)
- pngstruct.h => png_struct declaration (private)
- pnginfo.h => png_info struct declaration (private)
- pngdebug.h => debugging macros (private)
- pngerror.c => Error/warning message I/O functions
- pngget.c => Functions for retrieving info from struct
- pngmem.c => Memory handling functions
- pngbar.png => PNG logo, 88x31
- pngnow.png => PNG logo, 98x31
- pngpread.c => Progressive reading functions
- pngread.c => Read data/helper high-level functions
- pngrio.c => Lowest-level data read I/O functions
- pngrtran.c => Read data transformation functions
- pngrutil.c => Read data utility functions
- pngset.c => Functions for storing data into the info_struct
- pngtest.c => Library test program
- pngtest.png => Library test sample image
- pngtrans.c => Common data transformation functions
- pngwio.c => Lowest-level write I/O functions
- pngwrite.c => High-level write functions
- pngwtran.c => Write data transformations
- pngwutil.c => Write utility functions
- contrib => Contributions
- gregbook => source code for PNG reading and writing, from
- Greg Roelofs' "PNG: The Definitive Guide",
- O'Reilly, 1999
- msvctest => Builds and runs pngtest using a MSVC workspace
- pngminus => Simple pnm2png and png2pnm programs
- pngsuite => Test images
- visupng => Contains a MSVC workspace for VisualPng
- projects => Contains project files and workspaces for
- building a DLL
- cbuilder5 => Contains a Borland workspace for building
- libpng and zlib
- visualc6 => Contains a Microsoft Visual C++ (MSVC)
- workspace for building libpng and zlib
- visualc71 => Contains a Microsoft Visual C++ (MSVC)
- workspace for building libpng and zlib
- xcode => Contains an Apple xcode
- workspace for building libpng and zlib
- scripts => Directory containing scripts for building libpng:
- (see scripts/README.txt for the list of scripts)
-
-Good luck, and happy coding.
-
--Glenn Randers-Pehrson (current maintainer, since 1998)
- Internet: glennrp at users.sourceforge.net
-
--Andreas Eric Dilger (former maintainer, 1996-1997)
- Internet: adilger at enel.ucalgary.ca
- Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
-
--Guy Eric Schalnat (original author and former maintainer, 1995-1996)
- (formerly of Group 42, Inc)
- Internet: gschal at infinet.com
+++ /dev/null
-/*
-TODO - list of things to do for libpng:
-
-Final bug fixes.
-Better C++ wrapper/full C++ implementation?
-Fix problem with C++ and EXTERN "C".
-cHRM transformation.
-Remove setjmp/longjmp usage in favor of returning error codes.
-Add "grayscale->palette" transformation and "palette->grayscale" detection.
-Improved dithering.
-Multi-lingual error and warning message support.
-Complete sRGB transformation (presently it simply uses gamma=0.45455).
-Man pages for function calls.
-Better documentation.
-Better filter selection
- (counting huffman bits/precompression? filter inertia? filter costs?).
-Histogram creation.
-Text conversion between different code pages (Latin-1 -> Mac and DOS).
-Avoid building gamma tables whenever possible.
-Use greater precision when changing to linear gamma for compositing against
- background and doing rgb-to-gray transformation.
-Investigate pre-incremented loop counters and other loop constructions.
-Add interpolated method of handling interlacing.
-Switch to the simpler zlib (zlib/libpng) license if legally possible.
-Extend pngvalid.c to validate more of the libpng transformations.
-
-*/
+++ /dev/null
-libpng.txt - A description on how to use and modify libpng
-
- libpng version 1.4.4 - September 23, 2010
- Updated and distributed by Glenn Randers-Pehrson
- <glennrp at users.sourceforge.net>
- Copyright (c) 1998-2010 Glenn Randers-Pehrson
-
- This document is released under the libpng license.
- For conditions of distribution and use, see the disclaimer
- and license in png.h
-
- Based on:
-
- libpng versions 0.97, January 1998, through 1.4.4 - September 23, 2010
- Updated and distributed by Glenn Randers-Pehrson
- Copyright (c) 1998-2010 Glenn Randers-Pehrson
-
- libpng 1.0 beta 6 version 0.96 May 28, 1997
- Updated and distributed by Andreas Dilger
- Copyright (c) 1996, 1997 Andreas Dilger
-
- libpng 1.0 beta 2 - version 0.88 January 26, 1996
- For conditions of distribution and use, see copyright
- notice in png.h. Copyright (c) 1995, 1996 Guy Eric
- Schalnat, Group 42, Inc.
-
- Updated/rewritten per request in the libpng FAQ
- Copyright (c) 1995, 1996 Frank J. T. Wojcik
- December 18, 1995 & January 20, 1996
-
-I. Introduction
-
-This file describes how to use and modify the PNG reference library
-(known as libpng) for your own use. There are five sections to this
-file: introduction, structures, reading, writing, and modification and
-configuration notes for various special platforms. In addition to this
-file, example.c is a good starting point for using the library, as
-it is heavily commented and should include everything most people
-will need. We assume that libpng is already installed; see the
-INSTALL file for instructions on how to install libpng.
-
-For examples of libpng usage, see the files "example.c", "pngtest.c",
-and the files in the "contrib" directory, all of which are included in
-the libpng distribution.
-
-Libpng was written as a companion to the PNG specification, as a way
-of reducing the amount of time and effort it takes to support the PNG
-file format in application programs.
-
-The PNG specification (second edition), November 2003, is available as
-a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2003 (E)) at
-<http://www.w3.org/TR/2003/REC-PNG-20031110/
-The W3C and ISO documents have identical technical content.
-
-The PNG-1.2 specification is available at
-<http://www.libpng.org/pub/png/documents/>. It is technically equivalent
-to the PNG specification (second edition) but has some additional material.
-
-The PNG-1.0 specification is available
-as RFC 2083 <http://www.libpng.org/pub/png/documents/> and as a
-W3C Recommendation <http://www.w3.org/TR/REC.png.html>.
-
-Some additional chunks are described in the special-purpose public chunks
-documents at <http://www.libpng.org/pub/png/documents/>.
-
-Other information
-about PNG, and the latest version of libpng, can be found at the PNG home
-page, <http://www.libpng.org/pub/png/>.
-
-Most users will not have to modify the library significantly; advanced
-users may want to modify it more. All attempts were made to make it as
-complete as possible, while keeping the code easy to understand.
-Currently, this library only supports C. Support for other languages
-is being considered.
-
-Libpng has been designed to handle multiple sessions at one time,
-to be easily modifiable, to be portable to the vast majority of
-machines (ANSI, K&R, 16-, 32-, and 64-bit) available, and to be easy
-to use. The ultimate goal of libpng is to promote the acceptance of
-the PNG file format in whatever way possible. While there is still
-work to be done (see the TODO file), libpng should cover the
-majority of the needs of its users.
-
-Libpng uses zlib for its compression and decompression of PNG files.
-Further information about zlib, and the latest version of zlib, can
-be found at the zlib home page, <http://www.info-zip.org/pub/infozip/zlib/>.
-The zlib compression utility is a general purpose utility that is
-useful for more than PNG files, and can be used without libpng.
-See the documentation delivered with zlib for more details.
-You can usually find the source files for the zlib utility wherever you
-find the libpng source files.
-
-Libpng is thread safe, provided the threads are using different
-instances of the structures. Each thread should have its own
-png_struct and png_info instances, and thus its own image.
-Libpng does not protect itself against two threads using the
-same instance of a structure.
-
-II. Structures
-
-There are two main structures that are important to libpng, png_struct
-and png_info. The first, png_struct, is an internal structure that
-will not, for the most part, be used by a user except as the first
-variable passed to every libpng function call.
-
-The png_info structure is designed to provide information about the
-PNG file. At one time, the fields of png_info were intended to be
-directly accessible to the user. However, this tended to cause problems
-with applications using dynamically loaded libraries, and as a result
-a set of interface functions for png_info (the png_get_*() and png_set_*()
-functions) was developed. The fields of png_info are still available for
-older applications, but it is suggested that applications use the new
-interfaces if at all possible.
-
-Applications that do make direct access to the members of png_struct (except
-for png_ptr->jmpbuf) must be recompiled whenever the library is updated,
-and applications that make direct access to the members of png_info must
-be recompiled if they were compiled or loaded with libpng version 1.0.6,
-in which the members were in a different order. In version 1.0.7, the
-members of the png_info structure reverted to the old order, as they were
-in versions 0.97c through 1.0.5. Starting with version 2.0.0, both
-structures are going to be hidden, and the contents of the structures will
-only be accessible through the png_get/png_set functions.
-
-The png.h header file is an invaluable reference for programming with libpng.
-And while I'm on the topic, make sure you include the libpng header file:
-
-#include <png.h>
-
-III. Reading
-
-We'll now walk you through the possible functions to call when reading
-in a PNG file sequentially, briefly explaining the syntax and purpose
-of each one. See example.c and png.h for more detail. While
-progressive reading is covered in the next section, you will still
-need some of the functions discussed in this section to read a PNG
-file.
-
-Setup
-
-You will want to do the I/O initialization(*) before you get into libpng,
-so if it doesn't work, you don't have much to undo. Of course, you
-will also want to insure that you are, in fact, dealing with a PNG
-file. Libpng provides a simple check to see if a file is a PNG file.
-To use it, pass in the first 1 to 8 bytes of the file to the function
-png_sig_cmp(), and it will return 0 (false) if the bytes match the
-corresponding bytes of the PNG signature, or nonzero (true) otherwise.
-Of course, the more bytes you pass in, the greater the accuracy of the
-prediction.
-
-If you are intending to keep the file pointer open for use in libpng,
-you must ensure you don't read more than 8 bytes from the beginning
-of the file, and you also have to make a call to png_set_sig_bytes_read()
-with the number of bytes you read from the beginning. Libpng will
-then only check the bytes (if any) that your program didn't read.
-
-(*): If you are not using the standard I/O functions, you will need
-to replace them with custom functions. See the discussion under
-Customizing libpng.
-
-
- FILE *fp = fopen(file_name, "rb");
- if (!fp)
- {
- return (ERROR);
- }
- fread(header, 1, number, fp);
- is_png = !png_sig_cmp(header, 0, number);
- if (!is_png)
- {
- return (NOT_PNG);
- }
-
-
-Next, png_struct and png_info need to be allocated and initialized. In
-order to ensure that the size of these structures is correct even with a
-dynamically linked libpng, there are functions to initialize and
-allocate the structures. We also pass the library version, optional
-pointers to error handling functions, and a pointer to a data struct for
-use by the error functions, if necessary (the pointer and functions can
-be NULL if the default error handlers are to be used). See the section
-on Changes to Libpng below regarding the old initialization functions.
-The structure allocation functions quietly return NULL if they fail to
-create the structure, so your application should check for that.
-
- png_structp png_ptr = png_create_read_struct
- (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
- user_error_fn, user_warning_fn);
- if (!png_ptr)
- return (ERROR);
-
- png_infop info_ptr = png_create_info_struct(png_ptr);
- if (!info_ptr)
- {
- png_destroy_read_struct(&png_ptr,
- (png_infopp)NULL, (png_infopp)NULL);
- return (ERROR);
- }
-
- png_infop end_info = png_create_info_struct(png_ptr);
- if (!end_info)
- {
- png_destroy_read_struct(&png_ptr, &info_ptr,
- (png_infopp)NULL);
- return (ERROR);
- }
-
-If you want to use your own memory allocation routines,
-define PNG_USER_MEM_SUPPORTED and use
-png_create_read_struct_2() instead of png_create_read_struct():
-
- png_structp png_ptr = png_create_read_struct_2
- (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
- user_error_fn, user_warning_fn, (png_voidp)
- user_mem_ptr, user_malloc_fn, user_free_fn);
-
-The error handling routines passed to png_create_read_struct()
-and the memory alloc/free routines passed to png_create_struct_2()
-are only necessary if you are not using the libpng supplied error
-handling and memory alloc/free functions.
-
-When libpng encounters an error, it expects to longjmp back
-to your routine. Therefore, you will need to call setjmp and pass
-your png_jmpbuf(png_ptr). If you read the file from different
-routines, you will need to update the jmpbuf field every time you enter
-a new routine that will call a png_*() function.
-
-See your documentation of setjmp/longjmp for your compiler for more
-information on setjmp/longjmp. See the discussion on libpng error
-handling in the Customizing Libpng section below for more information
-on the libpng error handling. If an error occurs, and libpng longjmp's
-back to your setjmp, you will want to call png_destroy_read_struct() to
-free any memory.
-
- if (setjmp(png_jmpbuf(png_ptr)))
- {
- png_destroy_read_struct(&png_ptr, &info_ptr,
- &end_info);
- fclose(fp);
- return (ERROR);
- }
-
-If you would rather avoid the complexity of setjmp/longjmp issues,
-you can compile libpng with PNG_NO_SETJMP, in which case
-errors will result in a call to PNG_ABORT() which defaults to abort().
-
-You can #define PNG_ABORT() to a function that does something
-more useful than abort(), as long as your function does not
-return.
-
-Now you need to set up the input code. The default for libpng is to
-use the C function fread(). If you use this, you will need to pass a
-valid FILE * in the function png_init_io(). Be sure that the file is
-opened in binary mode. If you wish to handle reading data in another
-way, you need not call the png_init_io() function, but you must then
-implement the libpng I/O methods discussed in the Customizing Libpng
-section below.
-
- png_init_io(png_ptr, fp);
-
-If you had previously opened the file and read any of the signature from
-the beginning in order to see if this was a PNG file, you need to let
-libpng know that there are some bytes missing from the start of the file.
-
- png_set_sig_bytes(png_ptr, number);
-
-You can change the zlib compression buffer size to be used while
-reading compressed data with
-
- png_set_compression_buffer_size(png_ptr, buffer_size);
-
-where the default size is 8192 bytes. Note that the buffer size
-is changed immediately and the buffer is reallocated immediately,
-instead of setting a flag to be acted upon later.
-
-Setting up callback code
-
-You can set up a callback function to handle any unknown chunks in the
-input stream. You must supply the function
-
- read_chunk_callback(png_ptr ptr,
- png_unknown_chunkp chunk);
- {
- /* The unknown chunk structure contains your
- chunk data, along with similar data for any other
- unknown chunks: */
-
- png_byte name[5];
- png_byte *data;
- png_size_t size;
-
- /* Note that libpng has already taken care of
- the CRC handling */
-
- /* put your code here. Search for your chunk in the
- unknown chunk structure, process it, and return one
- of the following: */
-
- return (-n); /* chunk had an error */
- return (0); /* did not recognize */
- return (n); /* success */
- }
-
-(You can give your function another name that you like instead of
-"read_chunk_callback")
-
-To inform libpng about your function, use
-
- png_set_read_user_chunk_fn(png_ptr, user_chunk_ptr,
- read_chunk_callback);
-
-This names not only the callback function, but also a user pointer that
-you can retrieve with
-
- png_get_user_chunk_ptr(png_ptr);
-
-If you call the png_set_read_user_chunk_fn() function, then all unknown
-chunks will be saved when read, in case your callback function will need
-one or more of them. This behavior can be changed with the
-png_set_keep_unknown_chunks() function, described below.
-
-At this point, you can set up a callback function that will be
-called after each row has been read, which you can use to control
-a progress meter or the like. It's demonstrated in pngtest.c.
-You must supply a function
-
- void read_row_callback(png_ptr ptr, png_uint_32 row,
- int pass);
- {
- /* put your code here */
- }
-
-(You can give it another name that you like instead of "read_row_callback")
-
-To inform libpng about your function, use
-
- png_set_read_status_fn(png_ptr, read_row_callback);
-
-Unknown-chunk handling
-
-Now you get to set the way the library processes unknown chunks in the
-input PNG stream. Both known and unknown chunks will be read. Normal
-behavior is that known chunks will be parsed into information in
-various info_ptr members while unknown chunks will be discarded. This
-behavior can be wasteful if your application will never use some known
-chunk types. To change this, you can call:
-
- png_set_keep_unknown_chunks(png_ptr, keep,
- chunk_list, num_chunks);
- keep - 0: default unknown chunk handling
- 1: ignore; do not keep
- 2: keep only if safe-to-copy
- 3: keep even if unsafe-to-copy
- You can use these definitions:
- PNG_HANDLE_CHUNK_AS_DEFAULT 0
- PNG_HANDLE_CHUNK_NEVER 1
- PNG_HANDLE_CHUNK_IF_SAFE 2
- PNG_HANDLE_CHUNK_ALWAYS 3
- chunk_list - list of chunks affected (a byte string,
- five bytes per chunk, NULL or '\0' if
- num_chunks is 0)
- num_chunks - number of chunks affected; if 0, all
- unknown chunks are affected. If nonzero,
- only the chunks in the list are affected
-
-Unknown chunks declared in this way will be saved as raw data onto a
-list of png_unknown_chunk structures. If a chunk that is normally
-known to libpng is named in the list, it will be handled as unknown,
-according to the "keep" directive. If a chunk is named in successive
-instances of png_set_keep_unknown_chunks(), the final instance will
-take precedence. The IHDR and IEND chunks should not be named in
-chunk_list; if they are, libpng will process them normally anyway.
-
-Here is an example of the usage of png_set_keep_unknown_chunks(),
-where the private "vpAg" chunk will later be processed by a user chunk
-callback function:
-
- png_byte vpAg[5]={118, 112, 65, 103, (png_byte) '\0'};
-
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- png_byte unused_chunks[]=
- {
- 104, 73, 83, 84, (png_byte) '\0', /* hIST */
- 105, 84, 88, 116, (png_byte) '\0', /* iTXt */
- 112, 67, 65, 76, (png_byte) '\0', /* pCAL */
- 115, 67, 65, 76, (png_byte) '\0', /* sCAL */
- 115, 80, 76, 84, (png_byte) '\0', /* sPLT */
- 116, 73, 77, 69, (png_byte) '\0', /* tIME */
- };
- #endif
-
- ...
-
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- /* ignore all unknown chunks: */
- png_set_keep_unknown_chunks(read_ptr, 1, NULL, 0);
- /* except for vpAg: */
- png_set_keep_unknown_chunks(read_ptr, 2, vpAg, 1);
- /* also ignore unused known chunks: */
- png_set_keep_unknown_chunks(read_ptr, 1, unused_chunks,
- (int)sizeof(unused_chunks)/5);
- #endif
-
-User limits
-
-The PNG specification allows the width and height of an image to be as
-large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
-Since very few applications really need to process such large images,
-we have imposed an arbitrary 1-million limit on rows and columns.
-Larger images will be rejected immediately with a png_error() call. If
-you wish to override this limit, you can use
-
- png_set_user_limits(png_ptr, width_max, height_max);
-
-to set your own limits, or use width_max = height_max = 0x7fffffffL
-to allow all valid dimensions (libpng may reject some very large images
-anyway because of potential buffer overflow conditions).
-
-You should put this statement after you create the PNG structure and
-before calling png_read_info(), png_read_png(), or png_process_data().
-If you need to retrieve the limits that are being applied, use
-
- width_max = png_get_user_width_max(png_ptr);
- height_max = png_get_user_height_max(png_ptr);
-
-The PNG specification sets no limit on the number of ancillary chunks
-allowed in a PNG datastream. You can impose a limit on the total number
-of sPLT, tEXt, iTXt, zTXt, and unknown chunks that will be stored, with
-
- png_set_chunk_cache_max(png_ptr, user_chunk_cache_max);
-
-where 0x7fffffffL means unlimited. You can retrieve this limit with
-
- chunk_cache_max = png_get_chunk_cache_max(png_ptr);
-
-This limit also applies to the number of buffers that can be allocated
-by png_decompress_chunk() while decompressing iTXt, zTXt, and iCCP chunks.
-
-You can also set a limit on the amount of memory that a compressed chunk
-other than IDAT can occupy, with
-
- png_set_chunk_malloc_max(png_ptr, user_chunk_malloc_max);
-
-and you can retrieve the limit with
-
- chunk_malloc_max = png_get_chunk_malloc_max(png_ptr);
-
-Any chunks that would cause either of these limits to be exceeded will
-be ignored.
-
-The high-level read interface
-
-At this point there are two ways to proceed; through the high-level
-read interface, or through a sequence of low-level read operations.
-You can use the high-level interface if (a) you are willing to read
-the entire image into memory, and (b) the input transformations
-you want to do are limited to the following set:
-
- PNG_TRANSFORM_IDENTITY No transformation
- PNG_TRANSFORM_STRIP_16 Strip 16-bit samples to
- 8 bits
- PNG_TRANSFORM_STRIP_ALPHA Discard the alpha channel
- PNG_TRANSFORM_PACKING Expand 1, 2 and 4-bit
- samples to bytes
- PNG_TRANSFORM_PACKSWAP Change order of packed
- pixels to LSB first
- PNG_TRANSFORM_EXPAND Perform set_expand()
- PNG_TRANSFORM_INVERT_MONO Invert monochrome images
- PNG_TRANSFORM_SHIFT Normalize pixels to the
- sBIT depth
- PNG_TRANSFORM_BGR Flip RGB to BGR, RGBA
- to BGRA
- PNG_TRANSFORM_SWAP_ALPHA Flip RGBA to ARGB or GA
- to AG
- PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity
- to transparency
- PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples
- PNG_TRANSFORM_GRAY_TO_RGB Expand grayscale samples
- to RGB (or GA to RGBA)
-
-(This excludes setting a background color, doing gamma transformation,
-quantizing, and setting filler.) If this is the case, simply do this:
-
- png_read_png(png_ptr, info_ptr, png_transforms, NULL)
-
-where png_transforms is an integer containing the bitwise OR of some
-set of transformation flags. This call is equivalent to png_read_info(),
-followed the set of transformations indicated by the transform mask,
-then png_read_image(), and finally png_read_end().
-
-(The final parameter of this call is not yet used. Someday it might point
-to transformation parameters required by some future input transform.)
-
-You must use png_transforms and not call any png_set_transform() functions
-when you use png_read_png().
-
-After you have called png_read_png(), you can retrieve the image data
-with
-
- row_pointers = png_get_rows(png_ptr, info_ptr);
-
-where row_pointers is an array of pointers to the pixel data for each row:
-
- png_bytep row_pointers[height];
-
-If you know your image size and pixel size ahead of time, you can allocate
-row_pointers prior to calling png_read_png() with
-
- if (height > PNG_UINT_32_MAX/png_sizeof(png_byte))
- png_error (png_ptr,
- "Image is too tall to process in memory");
- if (width > PNG_UINT_32_MAX/pixel_size)
- png_error (png_ptr,
- "Image is too wide to process in memory");
- row_pointers = png_malloc(png_ptr,
- height*png_sizeof(png_bytep));
- for (int i=0; i<height, i++)
- row_pointers[i]=NULL; /* security precaution */
- for (int i=0; i<height, i++)
- row_pointers[i]=png_malloc(png_ptr,
- width*pixel_size);
- png_set_rows(png_ptr, info_ptr, &row_pointers);
-
-Alternatively you could allocate your image in one big block and define
-row_pointers[i] to point into the proper places in your block.
-
-If you use png_set_rows(), the application is responsible for freeing
-row_pointers (and row_pointers[i], if they were separately allocated).
-
-If you don't allocate row_pointers ahead of time, png_read_png() will
-do it, and it'll be free'ed when you call png_destroy_*().
-
-The low-level read interface
-
-If you are going the low-level route, you are now ready to read all
-the file information up to the actual image data. You do this with a
-call to png_read_info().
-
- png_read_info(png_ptr, info_ptr);
-
-This will process all chunks up to but not including the image data.
-
-Querying the info structure
-
-Functions are used to get the information from the info_ptr once it
-has been read. Note that these fields may not be completely filled
-in until png_read_end() has read the chunk data following the image.
-
- png_get_IHDR(png_ptr, info_ptr, &width, &height,
- &bit_depth, &color_type, &interlace_type,
- &compression_type, &filter_method);
-
- width - holds the width of the image
- in pixels (up to 2^31).
- height - holds the height of the image
- in pixels (up to 2^31).
- bit_depth - holds the bit depth of one of the
- image channels. (valid values are
- 1, 2, 4, 8, 16 and depend also on
- the color_type. See also
- significant bits (sBIT) below).
- color_type - describes which color/alpha channels
- are present.
- PNG_COLOR_TYPE_GRAY
- (bit depths 1, 2, 4, 8, 16)
- PNG_COLOR_TYPE_GRAY_ALPHA
- (bit depths 8, 16)
- PNG_COLOR_TYPE_PALETTE
- (bit depths 1, 2, 4, 8)
- PNG_COLOR_TYPE_RGB
- (bit_depths 8, 16)
- PNG_COLOR_TYPE_RGB_ALPHA
- (bit_depths 8, 16)
-
- PNG_COLOR_MASK_PALETTE
- PNG_COLOR_MASK_COLOR
- PNG_COLOR_MASK_ALPHA
-
- filter_method - (must be PNG_FILTER_TYPE_BASE
- for PNG 1.0, and can also be
- PNG_INTRAPIXEL_DIFFERENCING if
- the PNG datastream is embedded in
- a MNG-1.0 datastream)
- compression_type - (must be PNG_COMPRESSION_TYPE_BASE
- for PNG 1.0)
- interlace_type - (PNG_INTERLACE_NONE or
- PNG_INTERLACE_ADAM7)
-
- Any or all of interlace_type, compression_type, or
- filter_method can be NULL if you are
- not interested in their values.
-
- Note that png_get_IHDR() returns 32-bit data into
- the application's width and height variables.
- This is an unsafe situation if these are 16-bit
- variables. In such situations, the
- png_get_image_width() and png_get_image_height()
- functions described below are safer.
-
- width = png_get_image_width(png_ptr,
- info_ptr);
- height = png_get_image_height(png_ptr,
- info_ptr);
- bit_depth = png_get_bit_depth(png_ptr,
- info_ptr);
- color_type = png_get_color_type(png_ptr,
- info_ptr);
- filter_method = png_get_filter_type(png_ptr,
- info_ptr);
- compression_type = png_get_compression_type(png_ptr,
- info_ptr);
- interlace_type = png_get_interlace_type(png_ptr,
- info_ptr);
-
- channels = png_get_channels(png_ptr, info_ptr);
- channels - number of channels of info for the
- color type (valid values are 1 (GRAY,
- PALETTE), 2 (GRAY_ALPHA), 3 (RGB),
- 4 (RGB_ALPHA or RGB + filler byte))
- rowbytes = png_get_rowbytes(png_ptr, info_ptr);
- rowbytes - number of bytes needed to hold a row
-
- signature = png_get_signature(png_ptr, info_ptr);
- signature - holds the signature read from the
- file (if any). The data is kept in
- the same offset it would be if the
- whole signature were read (i.e. if an
- application had already read in 4
- bytes of signature before starting
- libpng, the remaining 4 bytes would
- be in signature[4] through signature[7]
- (see png_set_sig_bytes())).
-
-These are also important, but their validity depends on whether the chunk
-has been read. The png_get_valid(png_ptr, info_ptr, PNG_INFO_<chunk>) and
-png_get_<chunk>(png_ptr, info_ptr, ...) functions return non-zero if the
-data has been read, or zero if it is missing. The parameters to the
-png_get_<chunk> are set directly if they are simple data types, or a
-pointer into the info_ptr is returned for any complex types.
-
- png_get_PLTE(png_ptr, info_ptr, &palette,
- &num_palette);
- palette - the palette for the file
- (array of png_color)
- num_palette - number of entries in the palette
-
- png_get_gAMA(png_ptr, info_ptr, &gamma);
- gamma - the gamma the file is written
- at (PNG_INFO_gAMA)
-
- png_get_sRGB(png_ptr, info_ptr, &srgb_intent);
- srgb_intent - the rendering intent (PNG_INFO_sRGB)
- The presence of the sRGB chunk
- means that the pixel data is in the
- sRGB color space. This chunk also
- implies specific values of gAMA and
- cHRM.
-
- png_get_iCCP(png_ptr, info_ptr, &name,
- &compression_type, &profile, &proflen);
- name - The profile name.
- compression - The compression type; always
- PNG_COMPRESSION_TYPE_BASE for PNG 1.0.
- You may give NULL to this argument to
- ignore it.
- profile - International Color Consortium color
- profile data. May contain NULs.
- proflen - length of profile data in bytes.
-
- png_get_sBIT(png_ptr, info_ptr, &sig_bit);
- sig_bit - the number of significant bits for
- (PNG_INFO_sBIT) each of the gray,
- red, green, and blue channels,
- whichever are appropriate for the
- given color type (png_color_16)
-
- png_get_tRNS(png_ptr, info_ptr, &trans_alpha,
- &num_trans, &trans_color);
- trans_alpha - array of alpha (transparency)
- entries for palette (PNG_INFO_tRNS)
- trans_color - graylevel or color sample values of
- the single transparent color for
- non-paletted images (PNG_INFO_tRNS)
- num_trans - number of transparent entries
- (PNG_INFO_tRNS)
-
- png_get_hIST(png_ptr, info_ptr, &hist);
- (PNG_INFO_hIST)
- hist - histogram of palette (array of
- png_uint_16)
-
- png_get_tIME(png_ptr, info_ptr, &mod_time);
- mod_time - time image was last modified
- (PNG_VALID_tIME)
-
- png_get_bKGD(png_ptr, info_ptr, &background);
- background - background color (PNG_VALID_bKGD)
- valid 16-bit red, green and blue
- values, regardless of color_type
-
- num_comments = png_get_text(png_ptr, info_ptr,
- &text_ptr, &num_text);
- num_comments - number of comments
- text_ptr - array of png_text holding image
- comments
- text_ptr[i].compression - type of compression used
- on "text" PNG_TEXT_COMPRESSION_NONE
- PNG_TEXT_COMPRESSION_zTXt
- PNG_ITXT_COMPRESSION_NONE
- PNG_ITXT_COMPRESSION_zTXt
- text_ptr[i].key - keyword for comment. Must contain
- 1-79 characters.
- text_ptr[i].text - text comments for current
- keyword. Can be empty.
- text_ptr[i].text_length - length of text string,
- after decompression, 0 for iTXt
- text_ptr[i].itxt_length - length of itxt string,
- after decompression, 0 for tEXt/zTXt
- text_ptr[i].lang - language of comment (empty
- string for unknown).
- text_ptr[i].lang_key - keyword in UTF-8
- (empty string for unknown).
- Note that the itxt_length, lang, and lang_key
- members of the text_ptr structure only exist
- when the library is built with iTXt chunk support.
-
- num_text - number of comments (same as
- num_comments; you can put NULL here
- to avoid the duplication)
- Note while png_set_text() will accept text, language,
- and translated keywords that can be NULL pointers, the
- structure returned by png_get_text will always contain
- regular zero-terminated C strings. They might be
- empty strings but they will never be NULL pointers.
-
- num_spalettes = png_get_sPLT(png_ptr, info_ptr,
- &palette_ptr);
- palette_ptr - array of palette structures holding
- contents of one or more sPLT chunks
- read.
- num_spalettes - number of sPLT chunks read.
-
- png_get_oFFs(png_ptr, info_ptr, &offset_x, &offset_y,
- &unit_type);
- offset_x - positive offset from the left edge
- of the screen
- offset_y - positive offset from the top edge
- of the screen
- unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER
-
- png_get_pHYs(png_ptr, info_ptr, &res_x, &res_y,
- &unit_type);
- res_x - pixels/unit physical resolution in
- x direction
- res_y - pixels/unit physical resolution in
- x direction
- unit_type - PNG_RESOLUTION_UNKNOWN,
- PNG_RESOLUTION_METER
-
- png_get_sCAL(png_ptr, info_ptr, &unit, &width,
- &height)
- unit - physical scale units (an integer)
- width - width of a pixel in physical scale units
- height - height of a pixel in physical scale units
- (width and height are doubles)
-
- png_get_sCAL_s(png_ptr, info_ptr, &unit, &width,
- &height)
- unit - physical scale units (an integer)
- width - width of a pixel in physical scale units
- height - height of a pixel in physical scale units
- (width and height are strings like "2.54")
-
- num_unknown_chunks = png_get_unknown_chunks(png_ptr,
- info_ptr, &unknowns)
- unknowns - array of png_unknown_chunk
- structures holding unknown chunks
- unknowns[i].name - name of unknown chunk
- unknowns[i].data - data of unknown chunk
- unknowns[i].size - size of unknown chunk's data
- unknowns[i].location - position of chunk in file
-
- The value of "i" corresponds to the order in which the
- chunks were read from the PNG file or inserted with the
- png_set_unknown_chunks() function.
-
-The data from the pHYs chunk can be retrieved in several convenient
-forms:
-
- res_x = png_get_x_pixels_per_meter(png_ptr,
- info_ptr)
- res_y = png_get_y_pixels_per_meter(png_ptr,
- info_ptr)
- res_x_and_y = png_get_pixels_per_meter(png_ptr,
- info_ptr)
- res_x = png_get_x_pixels_per_inch(png_ptr,
- info_ptr)
- res_y = png_get_y_pixels_per_inch(png_ptr,
- info_ptr)
- res_x_and_y = png_get_pixels_per_inch(png_ptr,
- info_ptr)
- aspect_ratio = png_get_pixel_aspect_ratio(png_ptr,
- info_ptr)
-
- (Each of these returns 0 [signifying "unknown"] if
- the data is not present or if res_x is 0;
- res_x_and_y is 0 if res_x != res_y)
-
-The data from the oFFs chunk can be retrieved in several convenient
-forms:
-
- x_offset = png_get_x_offset_microns(png_ptr, info_ptr);
- y_offset = png_get_y_offset_microns(png_ptr, info_ptr);
- x_offset = png_get_x_offset_inches(png_ptr, info_ptr);
- y_offset = png_get_y_offset_inches(png_ptr, info_ptr);
-
- (Each of these returns 0 [signifying "unknown" if both
- x and y are 0] if the data is not present or if the
- chunk is present but the unit is the pixel)
-
-For more information, see the png_info definition in png.h and the
-PNG specification for chunk contents. Be careful with trusting
-rowbytes, as some of the transformations could increase the space
-needed to hold a row (expand, filler, gray_to_rgb, etc.).
-See png_read_update_info(), below.
-
-A quick word about text_ptr and num_text. PNG stores comments in
-keyword/text pairs, one pair per chunk, with no limit on the number
-of text chunks, and a 2^31 byte limit on their size. While there are
-suggested keywords, there is no requirement to restrict the use to these
-strings. It is strongly suggested that keywords and text be sensible
-to humans (that's the point), so don't use abbreviations. Non-printing
-symbols are not allowed. See the PNG specification for more details.
-There is also no requirement to have text after the keyword.
-
-Keywords should be limited to 79 Latin-1 characters without leading or
-trailing spaces, but non-consecutive spaces are allowed within the
-keyword. It is possible to have the same keyword any number of times.
-The text_ptr is an array of png_text structures, each holding a
-pointer to a language string, a pointer to a keyword and a pointer to
-a text string. The text string, language code, and translated
-keyword may be empty or NULL pointers. The keyword/text
-pairs are put into the array in the order that they are received.
-However, some or all of the text chunks may be after the image, so, to
-make sure you have read all the text chunks, don't mess with these
-until after you read the stuff after the image. This will be
-mentioned again below in the discussion that goes with png_read_end().
-
-Input transformations
-
-After you've read the header information, you can set up the library
-to handle any special transformations of the image data. The various
-ways to transform the data will be described in the order that they
-should occur. This is important, as some of these change the color
-type and/or bit depth of the data, and some others only work on
-certain color types and bit depths. Even though each transformation
-checks to see if it has data that it can do something with, you should
-make sure to only enable a transformation if it will be valid for the
-data. For example, don't swap red and blue on grayscale data.
-
-The colors used for the background and transparency values should be
-supplied in the same format/depth as the current image data. They
-are stored in the same format/depth as the image data in a bKGD or tRNS
-chunk, so this is what libpng expects for this data. The colors are
-transformed to keep in sync with the image data when an application
-calls the png_read_update_info() routine (see below).
-
-Data will be decoded into the supplied row buffers packed into bytes
-unless the library has been told to transform it into another format.
-For example, 4 bit/pixel paletted or grayscale data will be returned
-2 pixels/byte with the leftmost pixel in the high-order bits of the
-byte, unless png_set_packing() is called. 8-bit RGB data will be stored
-in RGB RGB RGB format unless png_set_filler() or png_set_add_alpha()
-is called to insert filler bytes, either before or after each RGB triplet.
-16-bit RGB data will be returned RRGGBB RRGGBB, with the most significant
-byte of the color value first, unless png_set_strip_16() is called to
-transform it to regular RGB RGB triplets, or png_set_filler() or
-png_set_add alpha() is called to insert filler bytes, either before or
-after each RRGGBB triplet. Similarly, 8-bit or 16-bit grayscale data can
-be modified with
-png_set_filler(), png_set_add_alpha(), or png_set_strip_16().
-
-The following code transforms grayscale images of less than 8 to 8 bits,
-changes paletted images to RGB, and adds a full alpha channel if there is
-transparency information in a tRNS chunk. This is most useful on
-grayscale images with bit depths of 2 or 4 or if there is a multiple-image
-viewing application that wishes to treat all images in the same way.
-
- if (color_type == PNG_COLOR_TYPE_PALETTE)
- png_set_palette_to_rgb(png_ptr);
-
- if (color_type == PNG_COLOR_TYPE_GRAY &&
- bit_depth < 8) png_set_expand_gray_1_2_4_to_8(png_ptr);
-
- if (png_get_valid(png_ptr, info_ptr,
- PNG_INFO_tRNS)) png_set_tRNS_to_alpha(png_ptr);
-
-These three functions are actually aliases for png_set_expand(), added
-in libpng version 1.0.4, with the function names expanded to improve code
-readability. In some future version they may actually do different
-things.
-
-As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
-added. It expands the sample depth without changing tRNS to alpha.
-
-As of libpng version 1.4.4, not all possible expansions are supported.
-
-In the following table, the 01 means grayscale with depth<8, 31 means
-indexed with depth<8, other numerals represent the color type, "T" means
-the tRNS chunk is present, A means an alpha channel is present, and O
-means tRNS or alpha is present but all pixels in the image are opaque.
-
- FROM 01 31 0 0T 0O 2 2T 2O 3 3T 3O 4A 4O 6A 6O
- TO
- 01 -
- 31 -
- 0 1 -
- 0T -
- 0O -
- 2 GX -
- 2T -
- 2O -
- 3 1 -
- 3T -
- 3O -
- 4A T -
- 4O -
- 6A GX TX TX -
- 6O GX TX -
-
-Within the matrix,
- "-" means the transformation is not supported.
- "X" means the transformation is obtained by png_set_expand().
- "1" means the transformation is obtained by
- png_set_expand_gray_1_2_4_to_8
- "G" means the transformation is obtained by
- png_set_gray_to_rgb().
- "P" means the transformation is obtained by
- png_set_expand_palette_to_rgb().
- "T" means the transformation is obtained by
- png_set_tRNS_to_alpha().
-
-PNG can have files with 16 bits per channel. If you only can handle
-8 bits per channel, this will strip the pixels down to 8 bit.
-
- if (bit_depth == 16)
- png_set_strip_16(png_ptr);
-
-If, for some reason, you don't need the alpha channel on an image,
-and you want to remove it rather than combining it with the background
-(but the image author certainly had in mind that you *would* combine
-it with the background, so that's what you should probably do):
-
- if (color_type & PNG_COLOR_MASK_ALPHA)
- png_set_strip_alpha(png_ptr);
-
-In PNG files, the alpha channel in an image
-is the level of opacity. If you need the alpha channel in an image to
-be the level of transparency instead of opacity, you can invert the
-alpha channel (or the tRNS chunk data) after it's read, so that 0 is
-fully opaque and 255 (in 8-bit or paletted images) or 65535 (in 16-bit
-images) is fully transparent, with
-
- png_set_invert_alpha(png_ptr);
-
-PNG files pack pixels of bit depths 1, 2, and 4 into bytes as small as
-they can, resulting in, for example, 8 pixels per byte for 1 bit
-files. This code expands to 1 pixel per byte without changing the
-values of the pixels:
-
- if (bit_depth < 8)
- png_set_packing(png_ptr);
-
-PNG files have possible bit depths of 1, 2, 4, 8, and 16. All pixels
-stored in a PNG image have been "scaled" or "shifted" up to the next
-higher possible bit depth (e.g. from 5 bits/sample in the range [0,31]
-to 8 bits/sample in the range [0, 255]). However, it is also possible
-to convert the PNG pixel data back to the original bit depth of the
-image. This call reduces the pixels back down to the original bit depth:
-
- png_color_8p sig_bit;
-
- if (png_get_sBIT(png_ptr, info_ptr, &sig_bit))
- png_set_shift(png_ptr, sig_bit);
-
-PNG files store 3-color pixels in red, green, blue order. This code
-changes the storage of the pixels to blue, green, red:
-
- if (color_type == PNG_COLOR_TYPE_RGB ||
- color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- png_set_bgr(png_ptr);
-
-PNG files store RGB pixels packed into 3 or 6 bytes. This code expands them
-into 4 or 8 bytes for windowing systems that need them in this format:
-
- if (color_type == PNG_COLOR_TYPE_RGB)
- png_set_filler(png_ptr, filler, PNG_FILLER_BEFORE);
-
-where "filler" is the 8 or 16-bit number to fill with, and the location is
-either PNG_FILLER_BEFORE or PNG_FILLER_AFTER, depending upon whether
-you want the filler before the RGB or after. This transformation
-does not affect images that already have full alpha channels. To add an
-opaque alpha channel, use filler=0xff or 0xffff and PNG_FILLER_AFTER which
-will generate RGBA pixels.
-
-Note that png_set_filler() does not change the color type. If you want
-to do that, you can add a true alpha channel with
-
- if (color_type == PNG_COLOR_TYPE_RGB ||
- color_type == PNG_COLOR_TYPE_GRAY)
- png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER);
-
-where "filler" contains the alpha value to assign to each pixel.
-This function was added in libpng-1.2.7.
-
-If you are reading an image with an alpha channel, and you need the
-data as ARGB instead of the normal PNG format RGBA:
-
- if (color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- png_set_swap_alpha(png_ptr);
-
-For some uses, you may want a grayscale image to be represented as
-RGB. This code will do that conversion:
-
- if (color_type == PNG_COLOR_TYPE_GRAY ||
- color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- png_set_gray_to_rgb(png_ptr);
-
-Conversely, you can convert an RGB or RGBA image to grayscale or grayscale
-with alpha.
-
- if (color_type == PNG_COLOR_TYPE_RGB ||
- color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- png_set_rgb_to_gray_fixed(png_ptr, error_action,
- int red_weight, int green_weight);
-
- error_action = 1: silently do the conversion
- error_action = 2: issue a warning if the original
- image has any pixel where
- red != green or red != blue
- error_action = 3: issue an error and abort the
- conversion if the original
- image has any pixel where
- red != green or red != blue
-
- red_weight: weight of red component times 100000
- green_weight: weight of green component times 100000
- If either weight is negative, default
- weights (21268, 71514) are used.
-
-If you have set error_action = 1 or 2, you can
-later check whether the image really was gray, after processing
-the image rows, with the png_get_rgb_to_gray_status(png_ptr) function.
-It will return a png_byte that is zero if the image was gray or
-1 if there were any non-gray pixels. bKGD and sBIT data
-will be silently converted to grayscale, using the green channel
-data, regardless of the error_action setting.
-
-With red_weight+green_weight<=100000,
-the normalized graylevel is computed:
-
- int rw = red_weight * 65536;
- int gw = green_weight * 65536;
- int bw = 65536 - (rw + gw);
- gray = (rw*red + gw*green + bw*blue)/65536;
-
-The default values approximate those recommended in the Charles
-Poynton's Color FAQ, <http://www.inforamp.net/~poynton/>
-Copyright (c) 1998-01-04 Charles Poynton <poynton at inforamp.net>
-
- Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
-
-Libpng approximates this with
-
- Y = 0.21268 * R + 0.7151 * G + 0.07217 * B
-
-which can be expressed with integers as
-
- Y = (6969 * R + 23434 * G + 2365 * B)/32768
-
-The calculation is done in a linear colorspace, if the image gamma
-is known.
-
-If you have a grayscale and you are using png_set_expand_depth(),
-png_set_expand(), or png_set_gray_to_rgb to change to truecolor or to
-a higher bit-depth, you must either supply the background color as a gray
-value at the original file bit-depth (need_expand = 1) or else supply the
-background color as an RGB triplet at the final, expanded bit depth
-(need_expand = 0). Similarly, if you are reading a paletted image, you
-must either supply the background color as a palette index (need_expand = 1)
-or as an RGB triplet that may or may not be in the palette (need_expand = 0).
-
- png_color_16 my_background;
- png_color_16p image_background;
-
- if (png_get_bKGD(png_ptr, info_ptr, &image_background))
- png_set_background(png_ptr, image_background,
- PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
- else
- png_set_background(png_ptr, &my_background,
- PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
-
-The png_set_background() function tells libpng to composite images
-with alpha or simple transparency against the supplied background
-color. If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid),
-you may use this color, or supply another color more suitable for
-the current display (e.g., the background color from a web page). You
-need to tell libpng whether the color is in the gamma space of the
-display (PNG_BACKGROUND_GAMMA_SCREEN for colors you supply), the file
-(PNG_BACKGROUND_GAMMA_FILE for colors from the bKGD chunk), or one
-that is neither of these gammas (PNG_BACKGROUND_GAMMA_UNIQUE - I don't
-know why anyone would use this, but it's here).
-
-To properly display PNG images on any kind of system, the application needs
-to know what the display gamma is. Ideally, the user will know this, and
-the application will allow them to set it. One method of allowing the user
-to set the display gamma separately for each system is to check for a
-SCREEN_GAMMA or DISPLAY_GAMMA environment variable, which will hopefully be
-correctly set.
-
-Note that display_gamma is the overall gamma correction required to produce
-pleasing results, which depends on the lighting conditions in the surrounding
-environment. In a dim or brightly lit room, no compensation other than
-the physical gamma exponent of the monitor is needed, while in a dark room
-a slightly smaller exponent is better.
-
- double gamma, screen_gamma;
-
- if (/* We have a user-defined screen
- gamma value */)
- {
- screen_gamma = user_defined_screen_gamma;
- }
- /* One way that applications can share the same
- screen gamma value */
- else if ((gamma_str = getenv("SCREEN_GAMMA"))
- != NULL)
- {
- screen_gamma = (double)atof(gamma_str);
- }
- /* If we don't have another value */
- else
- {
- screen_gamma = 2.2; /* A good guess for a
- PC monitor in a bright office or a dim room */
- screen_gamma = 2.0; /* A good guess for a
- PC monitor in a dark room */
- screen_gamma = 1.7 or 1.0; /* A good
- guess for Mac systems */
- }
-
-The png_set_gamma() function handles gamma transformations of the data.
-Pass both the file gamma and the current screen_gamma. If the file does
-not have a gamma value, you can pass one anyway if you have an idea what
-it is (usually 0.45455 is a good guess for GIF images on PCs). Note
-that file gammas are inverted from screen gammas. See the discussions
-on gamma in the PNG specification for an excellent description of what
-gamma is, and why all applications should support it. It is strongly
-recommended that PNG viewers support gamma correction.
-
- if (png_get_gAMA(png_ptr, info_ptr, &gamma))
- png_set_gamma(png_ptr, screen_gamma, gamma);
- else
- png_set_gamma(png_ptr, screen_gamma, 0.45455);
-
-If you need to reduce an RGB file to a paletted file, or if a paletted
-file has more entries then will fit on your screen, png_set_quantize()
-will do that. Note that this is a simple match dither that merely
-finds the closest color available. This should work fairly well with
-optimized palettes, and fairly badly with linear color cubes. If you
-pass a palette that is larger then maximum_colors, the file will
-reduce the number of colors in the palette so it will fit into
-maximum_colors. If there is a histogram, it will use it to make
-more intelligent choices when reducing the palette. If there is no
-histogram, it may not do as good a job.
-
- if (color_type & PNG_COLOR_MASK_COLOR)
- {
- if (png_get_valid(png_ptr, info_ptr,
- PNG_INFO_PLTE))
- {
- png_uint_16p histogram = NULL;
-
- png_get_hIST(png_ptr, info_ptr,
- &histogram);
- png_set_quantize(png_ptr, palette, num_palette,
- max_screen_colors, histogram, 1);
- }
- else
- {
- png_color std_color_cube[MAX_SCREEN_COLORS] =
- { ... colors ... };
-
- png_set_quantize(png_ptr, std_color_cube,
- MAX_SCREEN_COLORS, MAX_SCREEN_COLORS,
- NULL,0);
- }
- }
-
-PNG files describe monochrome as black being zero and white being one.
-The following code will reverse this (make black be one and white be
-zero):
-
- if (bit_depth == 1 && color_type == PNG_COLOR_TYPE_GRAY)
- png_set_invert_mono(png_ptr);
-
-This function can also be used to invert grayscale and gray-alpha images:
-
- if (color_type == PNG_COLOR_TYPE_GRAY ||
- color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- png_set_invert_mono(png_ptr);
-
-PNG files store 16 bit pixels in network byte order (big-endian,
-ie. most significant bits first). This code changes the storage to the
-other way (little-endian, i.e. least significant bits first, the
-way PCs store them):
-
- if (bit_depth == 16)
- png_set_swap(png_ptr);
-
-If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you
-need to change the order the pixels are packed into bytes, you can use:
-
- if (bit_depth < 8)
- png_set_packswap(png_ptr);
-
-Finally, you can write your own transformation function if none of
-the existing ones meets your needs. This is done by setting a callback
-with
-
- png_set_read_user_transform_fn(png_ptr,
- read_transform_fn);
-
-You must supply the function
-
- void read_transform_fn(png_ptr ptr, row_info_ptr
- row_info, png_bytep data)
-
-See pngtest.c for a working example. Your function will be called
-after all of the other transformations have been processed.
-
-You can also set up a pointer to a user structure for use by your
-callback function, and you can inform libpng that your transform
-function will change the number of channels or bit depth with the
-function
-
- png_set_user_transform_info(png_ptr, user_ptr,
- user_depth, user_channels);
-
-The user's application, not libpng, is responsible for allocating and
-freeing any memory required for the user structure.
-
-You can retrieve the pointer via the function
-png_get_user_transform_ptr(). For example:
-
- voidp read_user_transform_ptr =
- png_get_user_transform_ptr(png_ptr);
-
-The last thing to handle is interlacing; this is covered in detail below,
-but you must call the function here if you want libpng to handle expansion
-of the interlaced image.
-
- number_of_passes = png_set_interlace_handling(png_ptr);
-
-After setting the transformations, libpng can update your png_info
-structure to reflect any transformations you've requested with this
-call. This is most useful to update the info structure's rowbytes
-field so you can use it to allocate your image memory. This function
-will also update your palette with the correct screen_gamma and
-background if these have been given with the calls above.
-
- png_read_update_info(png_ptr, info_ptr);
-
-After you call png_read_update_info(), you can allocate any
-memory you need to hold the image. The row data is simply
-raw byte data for all forms of images. As the actual allocation
-varies among applications, no example will be given. If you
-are allocating one large chunk, you will need to build an
-array of pointers to each row, as it will be needed for some
-of the functions below.
-
-Reading image data
-
-After you've allocated memory, you can read the image data.
-The simplest way to do this is in one function call. If you are
-allocating enough memory to hold the whole image, you can just
-call png_read_image() and libpng will read in all the image data
-and put it in the memory area supplied. You will need to pass in
-an array of pointers to each row.
-
-This function automatically handles interlacing, so you don't need
-to call png_set_interlace_handling() or call this function multiple
-times, or any of that other stuff necessary with png_read_rows().
-
- png_read_image(png_ptr, row_pointers);
-
-where row_pointers is:
-
- png_bytep row_pointers[height];
-
-You can point to void or char or whatever you use for pixels.
-
-If you don't want to read in the whole image at once, you can
-use png_read_rows() instead. If there is no interlacing (check
-interlace_type == PNG_INTERLACE_NONE), this is simple:
-
- png_read_rows(png_ptr, row_pointers, NULL,
- number_of_rows);
-
-where row_pointers is the same as in the png_read_image() call.
-
-If you are doing this just one row at a time, you can do this with
-a single row_pointer instead of an array of row_pointers:
-
- png_bytep row_pointer = row;
- png_read_row(png_ptr, row_pointer, NULL);
-
-If the file is interlaced (interlace_type != 0 in the IHDR chunk), things
-get somewhat harder. The only current (PNG Specification version 1.2)
-interlacing type for PNG is (interlace_type == PNG_INTERLACE_ADAM7)
-is a somewhat complicated 2D interlace scheme, known as Adam7, that
-breaks down an image into seven smaller images of varying size, based
-on an 8x8 grid.
-
-libpng can fill out those images or it can give them to you "as is".
-If you want them filled out, there are two ways to do that. The one
-mentioned in the PNG specification is to expand each pixel to cover
-those pixels that have not been read yet (the "rectangle" method).
-This results in a blocky image for the first pass, which gradually
-smooths out as more pixels are read. The other method is the "sparkle"
-method, where pixels are drawn only in their final locations, with the
-rest of the image remaining whatever colors they were initialized to
-before the start of the read. The first method usually looks better,
-but tends to be slower, as there are more pixels to put in the rows.
-
-If you don't want libpng to handle the interlacing details, just call
-png_read_rows() seven times to read in all seven images. Each of the
-images is a valid image by itself, or they can all be combined on an
-8x8 grid to form a single image (although if you intend to combine them
-you would be far better off using the libpng interlace handling).
-
-The first pass will return an image 1/8 as wide as the entire image
-(every 8th column starting in column 0) and 1/8 as high as the original
-(every 8th row starting in row 0), the second will be 1/8 as wide
-(starting in column 4) and 1/8 as high (also starting in row 0). The
-third pass will be 1/4 as wide (every 4th pixel starting in column 0) and
-1/8 as high (every 8th row starting in row 4), and the fourth pass will
-be 1/4 as wide and 1/4 as high (every 4th column starting in column 2,
-and every 4th row starting in row 0). The fifth pass will return an
-image 1/2 as wide, and 1/4 as high (starting at column 0 and row 2),
-while the sixth pass will be 1/2 as wide and 1/2 as high as the original
-(starting in column 1 and row 0). The seventh and final pass will be as
-wide as the original, and 1/2 as high, containing all of the odd
-numbered scanlines. Phew!
-
-If you want libpng to expand the images, call this before calling
-png_start_read_image() or png_read_update_info():
-
- if (interlace_type == PNG_INTERLACE_ADAM7)
- number_of_passes
- = png_set_interlace_handling(png_ptr);
-
-This will return the number of passes needed. Currently, this
-is seven, but may change if another interlace type is added.
-This function can be called even if the file is not interlaced,
-where it will return one pass.
-
-If you are not going to display the image after each pass, but are
-going to wait until the entire image is read in, use the sparkle
-effect. This effect is faster and the end result of either method
-is exactly the same. If you are planning on displaying the image
-after each pass, the "rectangle" effect is generally considered the
-better looking one.
-
-If you only want the "sparkle" effect, just call png_read_rows() as
-normal, with the third parameter NULL. Make sure you make pass over
-the image number_of_passes times, and you don't change the data in the
-rows between calls. You can change the locations of the data, just
-not the data. Each pass only writes the pixels appropriate for that
-pass, and assumes the data from previous passes is still valid.
-
- png_read_rows(png_ptr, row_pointers, NULL,
- number_of_rows);
-
-If you only want the first effect (the rectangles), do the same as
-before except pass the row buffer in the third parameter, and leave
-the second parameter NULL.
-
- png_read_rows(png_ptr, NULL, row_pointers,
- number_of_rows);
-
-Finishing a sequential read
-
-After you are finished reading the image through the
-low-level interface, you can finish reading the file. If you are
-interested in comments or time, which may be stored either before or
-after the image data, you should pass the separate png_info struct if
-you want to keep the comments from before and after the image
-separate. If you are not interested, you can pass NULL.
-
- png_read_end(png_ptr, end_info);
-
-When you are done, you can free all memory allocated by libpng like this:
-
- png_destroy_read_struct(&png_ptr, &info_ptr,
- &end_info);
-
-It is also possible to individually free the info_ptr members that
-point to libpng-allocated storage with the following function:
-
- png_free_data(png_ptr, info_ptr, mask, seq)
- mask - identifies data to be freed, a mask
- containing the bitwise OR of one or
- more of
- PNG_FREE_PLTE, PNG_FREE_TRNS,
- PNG_FREE_HIST, PNG_FREE_ICCP,
- PNG_FREE_PCAL, PNG_FREE_ROWS,
- PNG_FREE_SCAL, PNG_FREE_SPLT,
- PNG_FREE_TEXT, PNG_FREE_UNKN,
- or simply PNG_FREE_ALL
- seq - sequence number of item to be freed
- (-1 for all items)
-
-This function may be safely called when the relevant storage has
-already been freed, or has not yet been allocated, or was allocated
-by the user and not by libpng, and will in those cases do nothing.
-The "seq" parameter is ignored if only one item of the selected data
-type, such as PLTE, is allowed. If "seq" is not -1, and multiple items
-are allowed for the data type identified in the mask, such as text or
-sPLT, only the n'th item in the structure is freed, where n is "seq".
-
-The default behavior is only to free data that was allocated internally
-by libpng. This can be changed, so that libpng will not free the data,
-or so that it will free data that was allocated by the user with png_malloc()
-or png_zalloc() and passed in via a png_set_*() function, with
-
- png_data_freer(png_ptr, info_ptr, freer, mask)
- mask - which data elements are affected
- same choices as in png_free_data()
- freer - one of
- PNG_DESTROY_WILL_FREE_DATA
- PNG_SET_WILL_FREE_DATA
- PNG_USER_WILL_FREE_DATA
-
-This function only affects data that has already been allocated.
-You can call this function after reading the PNG data but before calling
-any png_set_*() functions, to control whether the user or the png_set_*()
-function is responsible for freeing any existing data that might be present,
-and again after the png_set_*() functions to control whether the user
-or png_destroy_*() is supposed to free the data. When the user assumes
-responsibility for libpng-allocated data, the application must use
-png_free() to free it, and when the user transfers responsibility to libpng
-for data that the user has allocated, the user must have used png_malloc()
-or png_zalloc() to allocate it.
-
-If you allocated your row_pointers in a single block, as suggested above in
-the description of the high level read interface, you must not transfer
-responsibility for freeing it to the png_set_rows or png_read_destroy function,
-because they would also try to free the individual row_pointers[i].
-
-If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword
-separately, do not transfer responsibility for freeing text_ptr to libpng,
-because when libpng fills a png_text structure it combines these members with
-the key member, and png_free_data() will free only text_ptr.key. Similarly,
-if you transfer responsibility for free'ing text_ptr from libpng to your
-application, your application must not separately free those members.
-
-The png_free_data() function will turn off the "valid" flag for anything
-it frees. If you need to turn the flag off for a chunk that was freed by
-your application instead of by libpng, you can use
-
- png_set_invalid(png_ptr, info_ptr, mask);
- mask - identifies the chunks to be made invalid,
- containing the bitwise OR of one or
- more of
- PNG_INFO_gAMA, PNG_INFO_sBIT,
- PNG_INFO_cHRM, PNG_INFO_PLTE,
- PNG_INFO_tRNS, PNG_INFO_bKGD,
- PNG_INFO_hIST, PNG_INFO_pHYs,
- PNG_INFO_oFFs, PNG_INFO_tIME,
- PNG_INFO_pCAL, PNG_INFO_sRGB,
- PNG_INFO_iCCP, PNG_INFO_sPLT,
- PNG_INFO_sCAL, PNG_INFO_IDAT
-
-For a more compact example of reading a PNG image, see the file example.c.
-
-Reading PNG files progressively
-
-The progressive reader is slightly different then the non-progressive
-reader. Instead of calling png_read_info(), png_read_rows(), and
-png_read_end(), you make one call to png_process_data(), which calls
-callbacks when it has the info, a row, or the end of the image. You
-set up these callbacks with png_set_progressive_read_fn(). You don't
-have to worry about the input/output functions of libpng, as you are
-giving the library the data directly in png_process_data(). I will
-assume that you have read the section on reading PNG files above,
-so I will only highlight the differences (although I will show
-all of the code).
-
-png_structp png_ptr;
-png_infop info_ptr;
-
- /* An example code fragment of how you would
- initialize the progressive reader in your
- application. */
- int
- initialize_png_reader()
- {
- png_ptr = png_create_read_struct
- (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
- user_error_fn, user_warning_fn);
- if (!png_ptr)
- return (ERROR);
- info_ptr = png_create_info_struct(png_ptr);
- if (!info_ptr)
- {
- png_destroy_read_struct(&png_ptr, (png_infopp)NULL,
- (png_infopp)NULL);
- return (ERROR);
- }
-
- if (setjmp(png_jmpbuf(png_ptr)))
- {
- png_destroy_read_struct(&png_ptr, &info_ptr,
- (png_infopp)NULL);
- return (ERROR);
- }
-
- /* This one's new. You can provide functions
- to be called when the header info is valid,
- when each row is completed, and when the image
- is finished. If you aren't using all functions,
- you can specify NULL parameters. Even when all
- three functions are NULL, you need to call
- png_set_progressive_read_fn(). You can use
- any struct as the user_ptr (cast to a void pointer
- for the function call), and retrieve the pointer
- from inside the callbacks using the function
-
- png_get_progressive_ptr(png_ptr);
-
- which will return a void pointer, which you have
- to cast appropriately.
- */
- png_set_progressive_read_fn(png_ptr, (void *)user_ptr,
- info_callback, row_callback, end_callback);
-
- return 0;
- }
-
- /* A code fragment that you call as you receive blocks
- of data */
- int
- process_data(png_bytep buffer, png_uint_32 length)
- {
- if (setjmp(png_jmpbuf(png_ptr)))
- {
- png_destroy_read_struct(&png_ptr, &info_ptr,
- (png_infopp)NULL);
- return (ERROR);
- }
-
- /* This one's new also. Simply give it a chunk
- of data from the file stream (in order, of
- course). On machines with segmented memory
- models machines, don't give it any more than
- 64K. The library seems to run fine with sizes
- of 4K. Although you can give it much less if
- necessary (I assume you can give it chunks of
- 1 byte, I haven't tried less then 256 bytes
- yet). When this function returns, you may
- want to display any rows that were generated
- in the row callback if you don't already do
- so there.
- */
- png_process_data(png_ptr, info_ptr, buffer, length);
- return 0;
- }
-
- /* This function is called (as set by
- png_set_progressive_read_fn() above) when enough data
- has been supplied so all of the header has been
- read.
- */
- void
- info_callback(png_structp png_ptr, png_infop info)
- {
- /* Do any setup here, including setting any of
- the transformations mentioned in the Reading
- PNG files section. For now, you _must_ call
- either png_start_read_image() or
- png_read_update_info() after all the
- transformations are set (even if you don't set
- any). You may start getting rows before
- png_process_data() returns, so this is your
- last chance to prepare for that.
- */
- }
-
- /* This function is called when each row of image
- data is complete */
- void
- row_callback(png_structp png_ptr, png_bytep new_row,
- png_uint_32 row_num, int pass)
- {
- /* If the image is interlaced, and you turned
- on the interlace handler, this function will
- be called for every row in every pass. Some
- of these rows will not be changed from the
- previous pass. When the row is not changed,
- the new_row variable will be NULL. The rows
- and passes are called in order, so you don't
- really need the row_num and pass, but I'm
- supplying them because it may make your life
- easier.
-
- For the non-NULL rows of interlaced images,
- you must call png_progressive_combine_row()
- passing in the row and the old row. You can
- call this function for NULL rows (it will just
- return) and for non-interlaced images (it just
- does the memcpy for you) if it will make the
- code easier. Thus, you can just do this for
- all cases:
- */
-
- png_progressive_combine_row(png_ptr, old_row,
- new_row);
-
- /* where old_row is what was displayed for
- previously for the row. Note that the first
- pass (pass == 0, really) will completely cover
- the old row, so the rows do not have to be
- initialized. After the first pass (and only
- for interlaced images), you will have to pass
- the current row, and the function will combine
- the old row and the new row.
- */
- }
-
- void
- end_callback(png_structp png_ptr, png_infop info)
- {
- /* This function is called after the whole image
- has been read, including any chunks after the
- image (up to and including the IEND). You
- will usually have the same info chunk as you
- had in the header, although some data may have
- been added to the comments and time fields.
-
- Most people won't do much here, perhaps setting
- a flag that marks the image as finished.
- */
- }
-
-
-
-IV. Writing
-
-Much of this is very similar to reading. However, everything of
-importance is repeated here, so you won't have to constantly look
-back up in the reading section to understand writing.
-
-Setup
-
-You will want to do the I/O initialization before you get into libpng,
-so if it doesn't work, you don't have anything to undo. If you are not
-using the standard I/O functions, you will need to replace them with
-custom writing functions. See the discussion under Customizing libpng.
-
- FILE *fp = fopen(file_name, "wb");
- if (!fp)
- {
- return (ERROR);
- }
-
-Next, png_struct and png_info need to be allocated and initialized.
-As these can be both relatively large, you may not want to store these
-on the stack, unless you have stack space to spare. Of course, you
-will want to check if they return NULL. If you are also reading,
-you won't want to name your read structure and your write structure
-both "png_ptr"; you can call them anything you like, such as
-"read_ptr" and "write_ptr". Look at pngtest.c, for example.
-
- png_structp png_ptr = png_create_write_struct
- (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
- user_error_fn, user_warning_fn);
- if (!png_ptr)
- return (ERROR);
-
- png_infop info_ptr = png_create_info_struct(png_ptr);
- if (!info_ptr)
- {
- png_destroy_write_struct(&png_ptr,
- (png_infopp)NULL);
- return (ERROR);
- }
-
-If you want to use your own memory allocation routines,
-define PNG_USER_MEM_SUPPORTED and use
-png_create_write_struct_2() instead of png_create_write_struct():
-
- png_structp png_ptr = png_create_write_struct_2
- (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
- user_error_fn, user_warning_fn, (png_voidp)
- user_mem_ptr, user_malloc_fn, user_free_fn);
-
-After you have these structures, you will need to set up the
-error handling. When libpng encounters an error, it expects to
-longjmp() back to your routine. Therefore, you will need to call
-setjmp() and pass the png_jmpbuf(png_ptr). If you
-write the file from different routines, you will need to update
-the png_jmpbuf(png_ptr) every time you enter a new routine that will
-call a png_*() function. See your documentation of setjmp/longjmp
-for your compiler for more information on setjmp/longjmp. See
-the discussion on libpng error handling in the Customizing Libpng
-section below for more information on the libpng error handling.
-
- if (setjmp(png_jmpbuf(png_ptr)))
- {
- png_destroy_write_struct(&png_ptr, &info_ptr);
- fclose(fp);
- return (ERROR);
- }
- ...
- return;
-
-If you would rather avoid the complexity of setjmp/longjmp issues,
-you can compile libpng with PNG_NO_SETJMP, in which case
-errors will result in a call to PNG_ABORT() which defaults to abort().
-
-You can #define PNG_ABORT() to a function that does something
-more useful than abort(), as long as your function does not
-return.
-
-Now you need to set up the output code. The default for libpng is to
-use the C function fwrite(). If you use this, you will need to pass a
-valid FILE * in the function png_init_io(). Be sure that the file is
-opened in binary mode. Again, if you wish to handle writing data in
-another way, see the discussion on libpng I/O handling in the Customizing
-Libpng section below.
-
- png_init_io(png_ptr, fp);
-
-If you are embedding your PNG into a datastream such as MNG, and don't
-want libpng to write the 8-byte signature, or if you have already
-written the signature in your application, use
-
- png_set_sig_bytes(png_ptr, 8);
-
-to inform libpng that it should not write a signature.
-
-Write callbacks
-
-At this point, you can set up a callback function that will be
-called after each row has been written, which you can use to control
-a progress meter or the like. It's demonstrated in pngtest.c.
-You must supply a function
-
- void write_row_callback(png_ptr, png_uint_32 row,
- int pass);
- {
- /* put your code here */
- }
-
-(You can give it another name that you like instead of "write_row_callback")
-
-To inform libpng about your function, use
-
- png_set_write_status_fn(png_ptr, write_row_callback);
-
-You now have the option of modifying how the compression library will
-run. The following functions are mainly for testing, but may be useful
-in some cases, like if you need to write PNG files extremely fast and
-are willing to give up some compression, or if you want to get the
-maximum possible compression at the expense of slower writing. If you
-have no special needs in this area, let the library do what it wants by
-not calling this function at all, as it has been tuned to deliver a good
-speed/compression ratio. The second parameter to png_set_filter() is
-the filter method, for which the only valid values are 0 (as of the
-July 1999 PNG specification, version 1.2) or 64 (if you are writing
-a PNG datastream that is to be embedded in a MNG datastream). The third
-parameter is a flag that indicates which filter type(s) are to be tested
-for each scanline. See the PNG specification for details on the specific
-filter types.
-
-
- /* turn on or off filtering, and/or choose
- specific filters. You can use either a single
- PNG_FILTER_VALUE_NAME or the bitwise OR of one
- or more PNG_FILTER_NAME masks. */
- png_set_filter(png_ptr, 0,
- PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE |
- PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB |
- PNG_FILTER_UP | PNG_FILTER_VALUE_UP |
- PNG_FILTER_AVG | PNG_FILTER_VALUE_AVG |
- PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH|
- PNG_ALL_FILTERS);
-
-If an application
-wants to start and stop using particular filters during compression,
-it should start out with all of the filters (to ensure that the previous
-row of pixels will be stored in case it's needed later), and then add
-and remove them after the start of compression.
-
-If you are writing a PNG datastream that is to be embedded in a MNG
-datastream, the second parameter can be either 0 or 64.
-
-The png_set_compression_*() functions interface to the zlib compression
-library, and should mostly be ignored unless you really know what you are
-doing. The only generally useful call is png_set_compression_level()
-which changes how much time zlib spends on trying to compress the image
-data. See the Compression Library (zlib.h and algorithm.txt, distributed
-with zlib) for details on the compression levels.
-
- /* set the zlib compression level */
- png_set_compression_level(png_ptr,
- Z_BEST_COMPRESSION);
-
- /* set other zlib parameters */
- png_set_compression_mem_level(png_ptr, 8);
- png_set_compression_strategy(png_ptr,
- Z_DEFAULT_STRATEGY);
- png_set_compression_window_bits(png_ptr, 15);
- png_set_compression_method(png_ptr, 8);
- png_set_compression_buffer_size(png_ptr, 8192)
-
-extern PNG_EXPORT(void,png_set_zbuf_size)
-
-Setting the contents of info for output
-
-You now need to fill in the png_info structure with all the data you
-wish to write before the actual image. Note that the only thing you
-are allowed to write after the image is the text chunks and the time
-chunk (as of PNG Specification 1.2, anyway). See png_write_end() and
-the latest PNG specification for more information on that. If you
-wish to write them before the image, fill them in now, and flag that
-data as being valid. If you want to wait until after the data, don't
-fill them until png_write_end(). For all the fields in png_info and
-their data types, see png.h. For explanations of what the fields
-contain, see the PNG specification.
-
-Some of the more important parts of the png_info are:
-
- png_set_IHDR(png_ptr, info_ptr, width, height,
- bit_depth, color_type, interlace_type,
- compression_type, filter_method)
- width - holds the width of the image
- in pixels (up to 2^31).
- height - holds the height of the image
- in pixels (up to 2^31).
- bit_depth - holds the bit depth of one of the
- image channels.
- (valid values are 1, 2, 4, 8, 16
- and depend also on the
- color_type. See also significant
- bits (sBIT) below).
- color_type - describes which color/alpha
- channels are present.
- PNG_COLOR_TYPE_GRAY
- (bit depths 1, 2, 4, 8, 16)
- PNG_COLOR_TYPE_GRAY_ALPHA
- (bit depths 8, 16)
- PNG_COLOR_TYPE_PALETTE
- (bit depths 1, 2, 4, 8)
- PNG_COLOR_TYPE_RGB
- (bit_depths 8, 16)
- PNG_COLOR_TYPE_RGB_ALPHA
- (bit_depths 8, 16)
-
- PNG_COLOR_MASK_PALETTE
- PNG_COLOR_MASK_COLOR
- PNG_COLOR_MASK_ALPHA
-
- interlace_type - PNG_INTERLACE_NONE or
- PNG_INTERLACE_ADAM7
- compression_type - (must be
- PNG_COMPRESSION_TYPE_DEFAULT)
- filter_method - (must be PNG_FILTER_TYPE_DEFAULT
- or, if you are writing a PNG to
- be embedded in a MNG datastream,
- can also be
- PNG_INTRAPIXEL_DIFFERENCING)
-
-If you call png_set_IHDR(), the call must appear before any of the
-other png_set_*() functions, because they might require access to some of
-the IHDR settings. The remaining png_set_*() functions can be called
-in any order.
-
-If you wish, you can reset the compression_type, interlace_type, or
-filter_method later by calling png_set_IHDR() again; if you do this, the
-width, height, bit_depth, and color_type must be the same in each call.
-
- png_set_PLTE(png_ptr, info_ptr, palette,
- num_palette);
- palette - the palette for the file
- (array of png_color)
- num_palette - number of entries in the palette
-
- png_set_gAMA(png_ptr, info_ptr, gamma);
- gamma - the gamma the image was created
- at (PNG_INFO_gAMA)
-
- png_set_sRGB(png_ptr, info_ptr, srgb_intent);
- srgb_intent - the rendering intent
- (PNG_INFO_sRGB) The presence of
- the sRGB chunk means that the pixel
- data is in the sRGB color space.
- This chunk also implies specific
- values of gAMA and cHRM. Rendering
- intent is the CSS-1 property that
- has been defined by the International
- Color Consortium
- (http://www.color.org).
- It can be one of
- PNG_sRGB_INTENT_SATURATION,
- PNG_sRGB_INTENT_PERCEPTUAL,
- PNG_sRGB_INTENT_ABSOLUTE, or
- PNG_sRGB_INTENT_RELATIVE.
-
-
- png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr,
- srgb_intent);
- srgb_intent - the rendering intent
- (PNG_INFO_sRGB) The presence of the
- sRGB chunk means that the pixel
- data is in the sRGB color space.
- This function also causes gAMA and
- cHRM chunks with the specific values
- that are consistent with sRGB to be
- written.
-
- png_set_iCCP(png_ptr, info_ptr, name, compression_type,
- profile, proflen);
- name - The profile name.
- compression - The compression type; always
- PNG_COMPRESSION_TYPE_BASE for PNG 1.0.
- You may give NULL to this argument to
- ignore it.
- profile - International Color Consortium color
- profile data. May contain NULs.
- proflen - length of profile data in bytes.
-
- png_set_sBIT(png_ptr, info_ptr, sig_bit);
- sig_bit - the number of significant bits for
- (PNG_INFO_sBIT) each of the gray, red,
- green, and blue channels, whichever are
- appropriate for the given color type
- (png_color_16)
-
- png_set_tRNS(png_ptr, info_ptr, trans_alpha,
- num_trans, trans_color);
- trans_alpha - array of alpha (transparency)
- entries for palette (PNG_INFO_tRNS)
- trans_color - graylevel or color sample values
- (in order red, green, blue) of the
- single transparent color for
- non-paletted images (PNG_INFO_tRNS)
- num_trans - number of transparent entries
- (PNG_INFO_tRNS)
-
- png_set_hIST(png_ptr, info_ptr, hist);
- (PNG_INFO_hIST)
- hist - histogram of palette (array of
- png_uint_16)
-
- png_set_tIME(png_ptr, info_ptr, mod_time);
- mod_time - time image was last modified
- (PNG_VALID_tIME)
-
- png_set_bKGD(png_ptr, info_ptr, background);
- background - background color (PNG_VALID_bKGD)
-
- png_set_text(png_ptr, info_ptr, text_ptr, num_text);
- text_ptr - array of png_text holding image
- comments
- text_ptr[i].compression - type of compression used
- on "text" PNG_TEXT_COMPRESSION_NONE
- PNG_TEXT_COMPRESSION_zTXt
- PNG_ITXT_COMPRESSION_NONE
- PNG_ITXT_COMPRESSION_zTXt
- text_ptr[i].key - keyword for comment. Must contain
- 1-79 characters.
- text_ptr[i].text - text comments for current
- keyword. Can be NULL or empty.
- text_ptr[i].text_length - length of text string,
- after decompression, 0 for iTXt
- text_ptr[i].itxt_length - length of itxt string,
- after decompression, 0 for tEXt/zTXt
- text_ptr[i].lang - language of comment (NULL or
- empty for unknown).
- text_ptr[i].translated_keyword - keyword in UTF-8 (NULL
- or empty for unknown).
- Note that the itxt_length, lang, and lang_key
- members of the text_ptr structure only exist
- when the library is built with iTXt chunk support.
-
- num_text - number of comments
-
- png_set_sPLT(png_ptr, info_ptr, &palette_ptr,
- num_spalettes);
- palette_ptr - array of png_sPLT_struct structures
- to be added to the list of palettes
- in the info structure.
- num_spalettes - number of palette structures to be
- added.
-
- png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y,
- unit_type);
- offset_x - positive offset from the left
- edge of the screen
- offset_y - positive offset from the top
- edge of the screen
- unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER
-
- png_set_pHYs(png_ptr, info_ptr, res_x, res_y,
- unit_type);
- res_x - pixels/unit physical resolution
- in x direction
- res_y - pixels/unit physical resolution
- in y direction
- unit_type - PNG_RESOLUTION_UNKNOWN,
- PNG_RESOLUTION_METER
-
- png_set_sCAL(png_ptr, info_ptr, unit, width, height)
- unit - physical scale units (an integer)
- width - width of a pixel in physical scale units
- height - height of a pixel in physical scale units
- (width and height are doubles)
-
- png_set_sCAL_s(png_ptr, info_ptr, unit, width, height)
- unit - physical scale units (an integer)
- width - width of a pixel in physical scale units
- height - height of a pixel in physical scale units
- (width and height are strings like "2.54")
-
- png_set_unknown_chunks(png_ptr, info_ptr, &unknowns,
- num_unknowns)
- unknowns - array of png_unknown_chunk
- structures holding unknown chunks
- unknowns[i].name - name of unknown chunk
- unknowns[i].data - data of unknown chunk
- unknowns[i].size - size of unknown chunk's data
- unknowns[i].location - position to write chunk in file
- 0: do not write chunk
- PNG_HAVE_IHDR: before PLTE
- PNG_HAVE_PLTE: before IDAT
- PNG_AFTER_IDAT: after IDAT
-
-The "location" member is set automatically according to
-what part of the output file has already been written.
-You can change its value after calling png_set_unknown_chunks()
-as demonstrated in pngtest.c. Within each of the "locations",
-the chunks are sequenced according to their position in the
-structure (that is, the value of "i", which is the order in which
-the chunk was either read from the input file or defined with
-png_set_unknown_chunks).
-
-A quick word about text and num_text. text is an array of png_text
-structures. num_text is the number of valid structures in the array.
-Each png_text structure holds a language code, a keyword, a text value,
-and a compression type.
-
-The compression types have the same valid numbers as the compression
-types of the image data. Currently, the only valid number is zero.
-However, you can store text either compressed or uncompressed, unlike
-images, which always have to be compressed. So if you don't want the
-text compressed, set the compression type to PNG_TEXT_COMPRESSION_NONE.
-Because tEXt and zTXt chunks don't have a language field, if you
-specify PNG_TEXT_COMPRESSION_NONE or PNG_TEXT_COMPRESSION_zTXt
-any language code or translated keyword will not be written out.
-
-Until text gets around 1000 bytes, it is not worth compressing it.
-After the text has been written out to the file, the compression type
-is set to PNG_TEXT_COMPRESSION_NONE_WR or PNG_TEXT_COMPRESSION_zTXt_WR,
-so that it isn't written out again at the end (in case you are calling
-png_write_end() with the same struct.
-
-The keywords that are given in the PNG Specification are:
-
- Title Short (one line) title or
- caption for image
- Author Name of image's creator
- Description Description of image (possibly long)
- Copyright Copyright notice
- Creation Time Time of original image creation
- (usually RFC 1123 format, see below)
- Software Software used to create the image
- Disclaimer Legal disclaimer
- Warning Warning of nature of content
- Source Device used to create the image
- Comment Miscellaneous comment; conversion
- from other image format
-
-The keyword-text pairs work like this. Keywords should be short
-simple descriptions of what the comment is about. Some typical
-keywords are found in the PNG specification, as is some recommendations
-on keywords. You can repeat keywords in a file. You can even write
-some text before the image and some after. For example, you may want
-to put a description of the image before the image, but leave the
-disclaimer until after, so viewers working over modem connections
-don't have to wait for the disclaimer to go over the modem before
-they start seeing the image. Finally, keywords should be full
-words, not abbreviations. Keywords and text are in the ISO 8859-1
-(Latin-1) character set (a superset of regular ASCII) and can not
-contain NUL characters, and should not contain control or other
-unprintable characters. To make the comments widely readable, stick
-with basic ASCII, and avoid machine specific character set extensions
-like the IBM-PC character set. The keyword must be present, but
-you can leave off the text string on non-compressed pairs.
-Compressed pairs must have a text string, as only the text string
-is compressed anyway, so the compression would be meaningless.
-
-PNG supports modification time via the png_time structure. Two
-conversion routines are provided, png_convert_from_time_t() for
-time_t and png_convert_from_struct_tm() for struct tm. The
-time_t routine uses gmtime(). You don't have to use either of
-these, but if you wish to fill in the png_time structure directly,
-you should provide the time in universal time (GMT) if possible
-instead of your local time. Note that the year number is the full
-year (e.g. 1998, rather than 98 - PNG is year 2000 compliant!), and
-that months start with 1.
-
-If you want to store the time of the original image creation, you should
-use a plain tEXt chunk with the "Creation Time" keyword. This is
-necessary because the "creation time" of a PNG image is somewhat vague,
-depending on whether you mean the PNG file, the time the image was
-created in a non-PNG format, a still photo from which the image was
-scanned, or possibly the subject matter itself. In order to facilitate
-machine-readable dates, it is recommended that the "Creation Time"
-tEXt chunk use RFC 1123 format dates (e.g. "22 May 1997 18:07:10 GMT"),
-although this isn't a requirement. Unlike the tIME chunk, the
-"Creation Time" tEXt chunk is not expected to be automatically changed
-by the software. To facilitate the use of RFC 1123 dates, a function
-png_convert_to_rfc1123(png_timep) is provided to convert from PNG
-time to an RFC 1123 format string.
-
-Writing unknown chunks
-
-You can use the png_set_unknown_chunks function to queue up chunks
-for writing. You give it a chunk name, raw data, and a size; that's
-all there is to it. The chunks will be written by the next following
-png_write_info_before_PLTE, png_write_info, or png_write_end function.
-Any chunks previously read into the info structure's unknown-chunk
-list will also be written out in a sequence that satisfies the PNG
-specification's ordering rules.
-
-The high-level write interface
-
-At this point there are two ways to proceed; through the high-level
-write interface, or through a sequence of low-level write operations.
-You can use the high-level interface if your image data is present
-in the info structure. All defined output
-transformations are permitted, enabled by the following masks.
-
- PNG_TRANSFORM_IDENTITY No transformation
- PNG_TRANSFORM_PACKING Pack 1, 2 and 4-bit samples
- PNG_TRANSFORM_PACKSWAP Change order of packed
- pixels to LSB first
- PNG_TRANSFORM_INVERT_MONO Invert monochrome images
- PNG_TRANSFORM_SHIFT Normalize pixels to the
- sBIT depth
- PNG_TRANSFORM_BGR Flip RGB to BGR, RGBA
- to BGRA
- PNG_TRANSFORM_SWAP_ALPHA Flip RGBA to ARGB or GA
- to AG
- PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity
- to transparency
- PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples
- PNG_TRANSFORM_STRIP_FILLER Strip out filler
- bytes (deprecated).
- PNG_TRANSFORM_STRIP_FILLER_BEFORE Strip out leading
- filler bytes
- PNG_TRANSFORM_STRIP_FILLER_AFTER Strip out trailing
- filler bytes
-
-If you have valid image data in the info structure (you can use
-png_set_rows() to put image data in the info structure), simply do this:
-
- png_write_png(png_ptr, info_ptr, png_transforms, NULL)
-
-where png_transforms is an integer containing the bitwise OR of some set of
-transformation flags. This call is equivalent to png_write_info(),
-followed the set of transformations indicated by the transform mask,
-then png_write_image(), and finally png_write_end().
-
-(The final parameter of this call is not yet used. Someday it might point
-to transformation parameters required by some future output transform.)
-
-You must use png_transforms and not call any png_set_transform() functions
-when you use png_write_png().
-
-The low-level write interface
-
-If you are going the low-level route instead, you are now ready to
-write all the file information up to the actual image data. You do
-this with a call to png_write_info().
-
- png_write_info(png_ptr, info_ptr);
-
-Note that there is one transformation you may need to do before
-png_write_info(). In PNG files, the alpha channel in an image is the
-level of opacity. If your data is supplied as a level of transparency,
-you can invert the alpha channel before you write it, so that 0 is
-fully transparent and 255 (in 8-bit or paletted images) or 65535
-(in 16-bit images) is fully opaque, with
-
- png_set_invert_alpha(png_ptr);
-
-This must appear before png_write_info() instead of later with the
-other transformations because in the case of paletted images the tRNS
-chunk data has to be inverted before the tRNS chunk is written. If
-your image is not a paletted image, the tRNS data (which in such cases
-represents a single color to be rendered as transparent) won't need to
-be changed, and you can safely do this transformation after your
-png_write_info() call.
-
-If you need to write a private chunk that you want to appear before
-the PLTE chunk when PLTE is present, you can write the PNG info in
-two steps, and insert code to write your own chunk between them:
-
- png_write_info_before_PLTE(png_ptr, info_ptr);
- png_set_unknown_chunks(png_ptr, info_ptr, ...);
- png_write_info(png_ptr, info_ptr);
-
-After you've written the file information, you can set up the library
-to handle any special transformations of the image data. The various
-ways to transform the data will be described in the order that they
-should occur. This is important, as some of these change the color
-type and/or bit depth of the data, and some others only work on
-certain color types and bit depths. Even though each transformation
-checks to see if it has data that it can do something with, you should
-make sure to only enable a transformation if it will be valid for the
-data. For example, don't swap red and blue on grayscale data.
-
-PNG files store RGB pixels packed into 3 or 6 bytes. This code tells
-the library to strip input data that has 4 or 8 bytes per pixel down
-to 3 or 6 bytes (or strip 2 or 4-byte grayscale+filler data to 1 or 2
-bytes per pixel).
-
- png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
-
-where the 0 is unused, and the location is either PNG_FILLER_BEFORE or
-PNG_FILLER_AFTER, depending upon whether the filler byte in the pixel
-is stored XRGB or RGBX.
-
-PNG files pack pixels of bit depths 1, 2, and 4 into bytes as small as
-they can, resulting in, for example, 8 pixels per byte for 1 bit files.
-If the data is supplied at 1 pixel per byte, use this code, which will
-correctly pack the pixels into a single byte:
-
- png_set_packing(png_ptr);
-
-PNG files reduce possible bit depths to 1, 2, 4, 8, and 16. If your
-data is of another bit depth, you can write an sBIT chunk into the
-file so that decoders can recover the original data if desired.
-
- /* Set the true bit depth of the image data */
- if (color_type & PNG_COLOR_MASK_COLOR)
- {
- sig_bit.red = true_bit_depth;
- sig_bit.green = true_bit_depth;
- sig_bit.blue = true_bit_depth;
- }
- else
- {
- sig_bit.gray = true_bit_depth;
- }
- if (color_type & PNG_COLOR_MASK_ALPHA)
- {
- sig_bit.alpha = true_bit_depth;
- }
-
- png_set_sBIT(png_ptr, info_ptr, &sig_bit);
-
-If the data is stored in the row buffer in a bit depth other than
-one supported by PNG (e.g. 3 bit data in the range 0-7 for a 4-bit PNG),
-this will scale the values to appear to be the correct bit depth as
-is required by PNG.
-
- png_set_shift(png_ptr, &sig_bit);
-
-PNG files store 16 bit pixels in network byte order (big-endian,
-ie. most significant bits first). This code would be used if they are
-supplied the other way (little-endian, i.e. least significant bits
-first, the way PCs store them):
-
- if (bit_depth > 8)
- png_set_swap(png_ptr);
-
-If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you
-need to change the order the pixels are packed into bytes, you can use:
-
- if (bit_depth < 8)
- png_set_packswap(png_ptr);
-
-PNG files store 3 color pixels in red, green, blue order. This code
-would be used if they are supplied as blue, green, red:
-
- png_set_bgr(png_ptr);
-
-PNG files describe monochrome as black being zero and white being
-one. This code would be used if the pixels are supplied with this reversed
-(black being one and white being zero):
-
- png_set_invert_mono(png_ptr);
-
-Finally, you can write your own transformation function if none of
-the existing ones meets your needs. This is done by setting a callback
-with
-
- png_set_write_user_transform_fn(png_ptr,
- write_transform_fn);
-
-You must supply the function
-
- void write_transform_fn(png_ptr ptr, row_info_ptr
- row_info, png_bytep data)
-
-See pngtest.c for a working example. Your function will be called
-before any of the other transformations are processed.
-
-You can also set up a pointer to a user structure for use by your
-callback function.
-
- png_set_user_transform_info(png_ptr, user_ptr, 0, 0);
-
-The user_channels and user_depth parameters of this function are ignored
-when writing; you can set them to zero as shown.
-
-You can retrieve the pointer via the function png_get_user_transform_ptr().
-For example:
-
- voidp write_user_transform_ptr =
- png_get_user_transform_ptr(png_ptr);
-
-It is possible to have libpng flush any pending output, either manually,
-or automatically after a certain number of lines have been written. To
-flush the output stream a single time call:
-
- png_write_flush(png_ptr);
-
-and to have libpng flush the output stream periodically after a certain
-number of scanlines have been written, call:
-
- png_set_flush(png_ptr, nrows);
-
-Note that the distance between rows is from the last time png_write_flush()
-was called, or the first row of the image if it has never been called.
-So if you write 50 lines, and then png_set_flush 25, it will flush the
-output on the next scanline, and every 25 lines thereafter, unless
-png_write_flush() is called before 25 more lines have been written.
-If nrows is too small (less than about 10 lines for a 640 pixel wide
-RGB image) the image compression may decrease noticeably (although this
-may be acceptable for real-time applications). Infrequent flushing will
-only degrade the compression performance by a few percent over images
-that do not use flushing.
-
-Writing the image data
-
-That's it for the transformations. Now you can write the image data.
-The simplest way to do this is in one function call. If you have the
-whole image in memory, you can just call png_write_image() and libpng
-will write the image. You will need to pass in an array of pointers to
-each row. This function automatically handles interlacing, so you don't
-need to call png_set_interlace_handling() or call this function multiple
-times, or any of that other stuff necessary with png_write_rows().
-
- png_write_image(png_ptr, row_pointers);
-
-where row_pointers is:
-
- png_byte *row_pointers[height];
-
-You can point to void or char or whatever you use for pixels.
-
-If you don't want to write the whole image at once, you can
-use png_write_rows() instead. If the file is not interlaced,
-this is simple:
-
- png_write_rows(png_ptr, row_pointers,
- number_of_rows);
-
-row_pointers is the same as in the png_write_image() call.
-
-If you are just writing one row at a time, you can do this with
-a single row_pointer instead of an array of row_pointers:
-
- png_bytep row_pointer = row;
-
- png_write_row(png_ptr, row_pointer);
-
-When the file is interlaced, things can get a good deal more complicated.
-The only currently (as of the PNG Specification version 1.2, dated July
-1999) defined interlacing scheme for PNG files is the "Adam7" interlace
-scheme, that breaks down an image into seven smaller images of varying
-size. libpng will build these images for you, or you can do them
-yourself. If you want to build them yourself, see the PNG specification
-for details of which pixels to write when.
-
-If you don't want libpng to handle the interlacing details, just
-use png_set_interlace_handling() and call png_write_rows() the
-correct number of times to write all seven sub-images.
-
-If you want libpng to build the sub-images, call this before you start
-writing any rows:
-
- number_of_passes =
- png_set_interlace_handling(png_ptr);
-
-This will return the number of passes needed. Currently, this is seven,
-but may change if another interlace type is added.
-
-Then write the complete image number_of_passes times.
-
- png_write_rows(png_ptr, row_pointers,
- number_of_rows);
-
-As some of these rows are not used, and thus return immediately, you may
-want to read about interlacing in the PNG specification, and only update
-the rows that are actually used.
-
-Finishing a sequential write
-
-After you are finished writing the image, you should finish writing
-the file. If you are interested in writing comments or time, you should
-pass an appropriately filled png_info pointer. If you are not interested,
-you can pass NULL.
-
- png_write_end(png_ptr, info_ptr);
-
-When you are done, you can free all memory used by libpng like this:
-
- png_destroy_write_struct(&png_ptr, &info_ptr);
-
-It is also possible to individually free the info_ptr members that
-point to libpng-allocated storage with the following function:
-
- png_free_data(png_ptr, info_ptr, mask, seq)
- mask - identifies data to be freed, a mask
- containing the bitwise OR of one or
- more of
- PNG_FREE_PLTE, PNG_FREE_TRNS,
- PNG_FREE_HIST, PNG_FREE_ICCP,
- PNG_FREE_PCAL, PNG_FREE_ROWS,
- PNG_FREE_SCAL, PNG_FREE_SPLT,
- PNG_FREE_TEXT, PNG_FREE_UNKN,
- or simply PNG_FREE_ALL
- seq - sequence number of item to be freed
- (-1 for all items)
-
-This function may be safely called when the relevant storage has
-already been freed, or has not yet been allocated, or was allocated
-by the user and not by libpng, and will in those cases do nothing.
-The "seq" parameter is ignored if only one item of the selected data
-type, such as PLTE, is allowed. If "seq" is not -1, and multiple items
-are allowed for the data type identified in the mask, such as text or
-sPLT, only the n'th item in the structure is freed, where n is "seq".
-
-If you allocated data such as a palette that you passed in to libpng
-with png_set_*, you must not free it until just before the call to
-png_destroy_write_struct().
-
-The default behavior is only to free data that was allocated internally
-by libpng. This can be changed, so that libpng will not free the data,
-or so that it will free data that was allocated by the user with png_malloc()
-or png_zalloc() and passed in via a png_set_*() function, with
-
- png_data_freer(png_ptr, info_ptr, freer, mask)
- mask - which data elements are affected
- same choices as in png_free_data()
- freer - one of
- PNG_DESTROY_WILL_FREE_DATA
- PNG_SET_WILL_FREE_DATA
- PNG_USER_WILL_FREE_DATA
-
-For example, to transfer responsibility for some data from a read structure
-to a write structure, you could use
-
- png_data_freer(read_ptr, read_info_ptr,
- PNG_USER_WILL_FREE_DATA,
- PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST)
- png_data_freer(write_ptr, write_info_ptr,
- PNG_DESTROY_WILL_FREE_DATA,
- PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST)
-
-thereby briefly reassigning responsibility for freeing to the user but
-immediately afterwards reassigning it once more to the write_destroy
-function. Having done this, it would then be safe to destroy the read
-structure and continue to use the PLTE, tRNS, and hIST data in the write
-structure.
-
-This function only affects data that has already been allocated.
-You can call this function before calling after the png_set_*() functions
-to control whether the user or png_destroy_*() is supposed to free the data.
-When the user assumes responsibility for libpng-allocated data, the
-application must use
-png_free() to free it, and when the user transfers responsibility to libpng
-for data that the user has allocated, the user must have used png_malloc()
-or png_zalloc() to allocate it.
-
-If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword
-separately, do not transfer responsibility for freeing text_ptr to libpng,
-because when libpng fills a png_text structure it combines these members with
-the key member, and png_free_data() will free only text_ptr.key. Similarly,
-if you transfer responsibility for free'ing text_ptr from libpng to your
-application, your application must not separately free those members.
-For a more compact example of writing a PNG image, see the file example.c.
-
-V. Modifying/Customizing libpng:
-
-There are two issues here. The first is changing how libpng does
-standard things like memory allocation, input/output, and error handling.
-The second deals with more complicated things like adding new chunks,
-adding new transformations, and generally changing how libpng works.
-Both of those are compile-time issues; that is, they are generally
-determined at the time the code is written, and there is rarely a need
-to provide the user with a means of changing them.
-
-Memory allocation, input/output, and error handling
-
-All of the memory allocation, input/output, and error handling in libpng
-goes through callbacks that are user-settable. The default routines are
-in pngmem.c, pngrio.c, pngwio.c, and pngerror.c, respectively. To change
-these functions, call the appropriate png_set_*_fn() function.
-
-Memory allocation is done through the functions png_malloc(), png_calloc(),
-and png_free(). These currently just call the standard C functions.
-png_calloc() calls png_malloc() and then png_memset() to clear the newly
-allocated memory to zero. If your pointers can't access more then 64K
-at a time, you will want to set MAXSEG_64K in zlib.h. Since it is
-unlikely that the method of handling memory allocation on a platform
-will change between applications, these functions must be modified in
-the library at compile time. If you prefer to use a different method
-of allocating and freeing data, you can use png_create_read_struct_2() or
-png_create_write_struct_2() to register your own functions as described
-above. These functions also provide a void pointer that can be retrieved
-via
-
- mem_ptr=png_get_mem_ptr(png_ptr);
-
-Your replacement memory functions must have prototypes as follows:
-
- png_voidp malloc_fn(png_structp png_ptr,
- png_alloc_size_t size);
- void free_fn(png_structp png_ptr, png_voidp ptr);
-
-Your malloc_fn() must return NULL in case of failure. The png_malloc()
-function will normally call png_error() if it receives a NULL from the
-system memory allocator or from your replacement malloc_fn().
-
-Your free_fn() will never be called with a NULL ptr, since libpng's
-png_free() checks for NULL before calling free_fn().
-
-Input/Output in libpng is done through png_read() and png_write(),
-which currently just call fread() and fwrite(). The FILE * is stored in
-png_struct and is initialized via png_init_io(). If you wish to change
-the method of I/O, the library supplies callbacks that you can set
-through the function png_set_read_fn() and png_set_write_fn() at run
-time, instead of calling the png_init_io() function. These functions
-also provide a void pointer that can be retrieved via the function
-png_get_io_ptr(). For example:
-
- png_set_read_fn(png_structp read_ptr,
- voidp read_io_ptr, png_rw_ptr read_data_fn)
-
- png_set_write_fn(png_structp write_ptr,
- voidp write_io_ptr, png_rw_ptr write_data_fn,
- png_flush_ptr output_flush_fn);
-
- voidp read_io_ptr = png_get_io_ptr(read_ptr);
- voidp write_io_ptr = png_get_io_ptr(write_ptr);
-
-The replacement I/O functions must have prototypes as follows:
-
- void user_read_data(png_structp png_ptr,
- png_bytep data, png_size_t length);
- void user_write_data(png_structp png_ptr,
- png_bytep data, png_size_t length);
- void user_flush_data(png_structp png_ptr);
-
-The user_read_data() function is responsible for detecting and
-handling end-of-data errors.
-
-Supplying NULL for the read, write, or flush functions sets them back
-to using the default C stream functions, which expect the io_ptr to
-point to a standard *FILE structure. It is probably a mistake
-to use NULL for one of write_data_fn and output_flush_fn but not both
-of them, unless you have built libpng with PNG_NO_WRITE_FLUSH defined.
-It is an error to read from a write stream, and vice versa.
-
-Error handling in libpng is done through png_error() and png_warning().
-Errors handled through png_error() are fatal, meaning that png_error()
-should never return to its caller. Currently, this is handled via
-setjmp() and longjmp() (unless you have compiled libpng with
-PNG_NO_SETJMP, in which case it is handled via PNG_ABORT()),
-but you could change this to do things like exit() if you should wish,
-as long as your function does not return.
-
-On non-fatal errors, png_warning() is called
-to print a warning message, and then control returns to the calling code.
-By default png_error() and png_warning() print a message on stderr via
-fprintf() unless the library is compiled with PNG_NO_CONSOLE_IO defined
-(because you don't want the messages) or PNG_NO_STDIO defined (because
-fprintf() isn't available). If you wish to change the behavior of the error
-functions, you will need to set up your own message callbacks. These
-functions are normally supplied at the time that the png_struct is created.
-It is also possible to redirect errors and warnings to your own replacement
-functions after png_create_*_struct() has been called by calling:
-
- png_set_error_fn(png_structp png_ptr,
- png_voidp error_ptr, png_error_ptr error_fn,
- png_error_ptr warning_fn);
-
- png_voidp error_ptr = png_get_error_ptr(png_ptr);
-
-If NULL is supplied for either error_fn or warning_fn, then the libpng
-default function will be used, calling fprintf() and/or longjmp() if a
-problem is encountered. The replacement error functions should have
-parameters as follows:
-
- void user_error_fn(png_structp png_ptr,
- png_const_charp error_msg);
- void user_warning_fn(png_structp png_ptr,
- png_const_charp warning_msg);
-
-The motivation behind using setjmp() and longjmp() is the C++ throw and
-catch exception handling methods. This makes the code much easier to write,
-as there is no need to check every return code of every function call.
-However, there are some uncertainties about the status of local variables
-after a longjmp, so the user may want to be careful about doing anything
-after setjmp returns non-zero besides returning itself. Consult your
-compiler documentation for more details. For an alternative approach, you
-may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net).
-
-Custom chunks
-
-If you need to read or write custom chunks, you may need to get deeper
-into the libpng code. The library now has mechanisms for storing
-and writing chunks of unknown type; you can even declare callbacks
-for custom chunks. However, this may not be good enough if the
-library code itself needs to know about interactions between your
-chunk and existing `intrinsic' chunks.
-
-If you need to write a new intrinsic chunk, first read the PNG
-specification. Acquire a first level of understanding of how it works.
-Pay particular attention to the sections that describe chunk names,
-and look at how other chunks were designed, so you can do things
-similarly. Second, check out the sections of libpng that read and
-write chunks. Try to find a chunk that is similar to yours and use
-it as a template. More details can be found in the comments inside
-the code. It is best to handle unknown chunks in a generic method,
-via callback functions, instead of by modifying libpng functions.
-
-If you wish to write your own transformation for the data, look through
-the part of the code that does the transformations, and check out some of
-the simpler ones to get an idea of how they work. Try to find a similar
-transformation to the one you want to add and copy off of it. More details
-can be found in the comments inside the code itself.
-
-Configuring for 16 bit platforms
-
-You will want to look into zconf.h to tell zlib (and thus libpng) that
-it cannot allocate more then 64K at a time. Even if you can, the memory
-won't be accessible. So limit zlib and libpng to 64K by defining MAXSEG_64K.
-
-Configuring for DOS
-
-For DOS users who only have access to the lower 640K, you will
-have to limit zlib's memory usage via a png_set_compression_mem_level()
-call. See zlib.h or zconf.h in the zlib library for more information.
-
-Configuring for Medium Model
-
-Libpng's support for medium model has been tested on most of the popular
-compilers. Make sure MAXSEG_64K gets defined, USE_FAR_KEYWORD gets
-defined, and FAR gets defined to far in pngconf.h, and you should be
-all set. Everything in the library (except for zlib's structure) is
-expecting far data. You must use the typedefs with the p or pp on
-the end for pointers (or at least look at them and be careful). Make
-note that the rows of data are defined as png_bytepp, which is an
-unsigned char far * far *.
-
-Configuring for gui/windowing platforms:
-
-You will need to write new error and warning functions that use the GUI
-interface, as described previously, and set them to be the error and
-warning functions at the time that png_create_*_struct() is called,
-in order to have them available during the structure initialization.
-They can be changed later via png_set_error_fn(). On some compilers,
-you may also have to change the memory allocators (png_malloc, etc.).
-
-Configuring for compiler xxx:
-
-All includes for libpng are in pngconf.h. If you need to add, change
-or delete an include, this is the place to do it.
-The includes that are not needed outside libpng are placed in pngpriv.h,
-which is only used by the routines inside libpng itself.
-The files in libpng proper only include pngpriv.h and png.h, which
-in turn includes pngconf.h.
-
-Configuring zlib:
-
-There are special functions to configure the compression. Perhaps the
-most useful one changes the compression level, which currently uses
-input compression values in the range 0 - 9. The library normally
-uses the default compression level (Z_DEFAULT_COMPRESSION = 6). Tests
-have shown that for a large majority of images, compression values in
-the range 3-6 compress nearly as well as higher levels, and do so much
-faster. For online applications it may be desirable to have maximum speed
-(Z_BEST_SPEED = 1). With versions of zlib after v0.99, you can also
-specify no compression (Z_NO_COMPRESSION = 0), but this would create
-files larger than just storing the raw bitmap. You can specify the
-compression level by calling:
-
- png_set_compression_level(png_ptr, level);
-
-Another useful one is to reduce the memory level used by the library.
-The memory level defaults to 8, but it can be lowered if you are
-short on memory (running DOS, for example, where you only have 640K).
-Note that the memory level does have an effect on compression; among
-other things, lower levels will result in sections of incompressible
-data being emitted in smaller stored blocks, with a correspondingly
-larger relative overhead of up to 15% in the worst case.
-
- png_set_compression_mem_level(png_ptr, level);
-
-The other functions are for configuring zlib. They are not recommended
-for normal use and may result in writing an invalid PNG file. See
-zlib.h for more information on what these mean.
-
- png_set_compression_strategy(png_ptr,
- strategy);
- png_set_compression_window_bits(png_ptr,
- window_bits);
- png_set_compression_method(png_ptr, method);
- png_set_compression_buffer_size(png_ptr, size);
-
-Controlling row filtering
-
-If you want to control whether libpng uses filtering or not, which
-filters are used, and how it goes about picking row filters, you
-can call one of these functions. The selection and configuration
-of row filters can have a significant impact on the size and
-encoding speed and a somewhat lesser impact on the decoding speed
-of an image. Filtering is enabled by default for RGB and grayscale
-images (with and without alpha), but not for paletted images nor
-for any images with bit depths less than 8 bits/pixel.
-
-The 'method' parameter sets the main filtering method, which is
-currently only '0' in the PNG 1.2 specification. The 'filters'
-parameter sets which filter(s), if any, should be used for each
-scanline. Possible values are PNG_ALL_FILTERS and PNG_NO_FILTERS
-to turn filtering on and off, respectively.
-
-Individual filter types are PNG_FILTER_NONE, PNG_FILTER_SUB,
-PNG_FILTER_UP, PNG_FILTER_AVG, PNG_FILTER_PAETH, which can be bitwise
-ORed together with '|' to specify one or more filters to use.
-These filters are described in more detail in the PNG specification.
-If you intend to change the filter type during the course of writing
-the image, you should start with flags set for all of the filters
-you intend to use so that libpng can initialize its internal
-structures appropriately for all of the filter types. (Note that this
-means the first row must always be adaptively filtered, because libpng
-currently does not allocate the filter buffers until png_write_row()
-is called for the first time.)
-
- filters = PNG_FILTER_NONE | PNG_FILTER_SUB
- PNG_FILTER_UP | PNG_FILTER_AVG |
- PNG_FILTER_PAETH | PNG_ALL_FILTERS;
-
- png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE,
- filters);
- The second parameter can also be
- PNG_INTRAPIXEL_DIFFERENCING if you are
- writing a PNG to be embedded in a MNG
- datastream. This parameter must be the
- same as the value of filter_method used
- in png_set_IHDR().
-
-It is also possible to influence how libpng chooses from among the
-available filters. This is done in one or both of two ways - by
-telling it how important it is to keep the same filter for successive
-rows, and by telling it the relative computational costs of the filters.
-
- double weights[3] = {1.5, 1.3, 1.1},
- costs[PNG_FILTER_VALUE_LAST] =
- {1.0, 1.3, 1.3, 1.5, 1.7};
-
- png_set_filter_heuristics(png_ptr,
- PNG_FILTER_HEURISTIC_WEIGHTED, 3,
- weights, costs);
-
-The weights are multiplying factors that indicate to libpng that the
-row filter should be the same for successive rows unless another row filter
-is that many times better than the previous filter. In the above example,
-if the previous 3 filters were SUB, SUB, NONE, the SUB filter could have a
-"sum of absolute differences" 1.5 x 1.3 times higher than other filters
-and still be chosen, while the NONE filter could have a sum 1.1 times
-higher than other filters and still be chosen. Unspecified weights are
-taken to be 1.0, and the specified weights should probably be declining
-like those above in order to emphasize recent filters over older filters.
-
-The filter costs specify for each filter type a relative decoding cost
-to be considered when selecting row filters. This means that filters
-with higher costs are less likely to be chosen over filters with lower
-costs, unless their "sum of absolute differences" is that much smaller.
-The costs do not necessarily reflect the exact computational speeds of
-the various filters, since this would unduly influence the final image
-size.
-
-Note that the numbers above were invented purely for this example and
-are given only to help explain the function usage. Little testing has
-been done to find optimum values for either the costs or the weights.
-
-Removing unwanted object code
-
-There are a bunch of #define's in pngconf.h that control what parts of
-libpng are compiled. All the defines end in _SUPPORTED. If you are
-never going to use a capability, you can change the #define to #undef
-before recompiling libpng and save yourself code and data space, or
-you can turn off individual capabilities with defines that begin with
-PNG_NO_.
-
-You can also turn all of the transforms and ancillary chunk capabilities
-off en masse with compiler directives that define
-PNG_NO_READ[or WRITE]_TRANSFORMS, or PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS,
-or all four,
-along with directives to turn on any of the capabilities that you do
-want. The PNG_NO_READ[or WRITE]_TRANSFORMS directives disable the extra
-transformations but still leave the library fully capable of reading
-and writing PNG files with all known public chunks. Use of the
-PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS directive produces a library
-that is incapable of reading or writing ancillary chunks. If you are
-not using the progressive reading capability, you can turn that off
-with PNG_NO_PROGRESSIVE_READ (don't confuse this with the INTERLACING
-capability, which you'll still have).
-
-All the reading and writing specific code are in separate files, so the
-linker should only grab the files it needs. However, if you want to
-make sure, or if you are building a stand alone library, all the
-reading files start with pngr and all the writing files start with
-pngw. The files that don't match either (like png.c, pngtrans.c, etc.)
-are used for both reading and writing, and always need to be included.
-The progressive reader is in pngpread.c
-
-If you are creating or distributing a dynamically linked library (a .so
-or DLL file), you should not remove or disable any parts of the library,
-as this will cause applications linked with different versions of the
-library to fail if they call functions not available in your library.
-The size of the library itself should not be an issue, because only
-those sections that are actually used will be loaded into memory.
-
-Requesting debug printout
-
-The macro definition PNG_DEBUG can be used to request debugging
-printout. Set it to an integer value in the range 0 to 3. Higher
-numbers result in increasing amounts of debugging information. The
-information is printed to the "stderr" file, unless another file
-name is specified in the PNG_DEBUG_FILE macro definition.
-
-When PNG_DEBUG > 0, the following functions (macros) become available:
-
- png_debug(level, message)
- png_debug1(level, message, p1)
- png_debug2(level, message, p1, p2)
-
-in which "level" is compared to PNG_DEBUG to decide whether to print
-the message, "message" is the formatted string to be printed,
-and p1 and p2 are parameters that are to be embedded in the string
-according to printf-style formatting directives. For example,
-
- png_debug1(2, "foo=%d\n", foo);
-
-is expanded to
-
- if(PNG_DEBUG > 2)
- fprintf(PNG_DEBUG_FILE, "foo=%d\n", foo);
-
-When PNG_DEBUG is defined but is zero, the macros aren't defined, but you
-can still use PNG_DEBUG to control your own debugging:
-
- #ifdef PNG_DEBUG
- fprintf(stderr, ...
- #endif
-
-When PNG_DEBUG = 1, the macros are defined, but only png_debug statements
-having level = 0 will be printed. There aren't any such statements in
-this version of libpng, but if you insert some they will be printed.
-
-VI. MNG support
-
-The MNG specification (available at http://www.libpng.org/pub/mng) allows
-certain extensions to PNG for PNG images that are embedded in MNG datastreams.
-Libpng can support some of these extensions. To enable them, use the
-png_permit_mng_features() function:
-
- feature_set = png_permit_mng_features(png_ptr, mask)
- mask is a png_uint_32 containing the bitwise OR of the
- features you want to enable. These include
- PNG_FLAG_MNG_EMPTY_PLTE
- PNG_FLAG_MNG_FILTER_64
- PNG_ALL_MNG_FEATURES
- feature_set is a png_uint_32 that is the bitwise AND of
- your mask with the set of MNG features that is
- supported by the version of libpng that you are using.
-
-It is an error to use this function when reading or writing a standalone
-PNG file with the PNG 8-byte signature. The PNG datastream must be wrapped
-in a MNG datastream. As a minimum, it must have the MNG 8-byte signature
-and the MHDR and MEND chunks. Libpng does not provide support for these
-or any other MNG chunks; your application must provide its own support for
-them. You may wish to consider using libmng (available at
-http://www.libmng.com) instead.
-
-VII. Changes to Libpng from version 0.88
-
-It should be noted that versions of libpng later than 0.96 are not
-distributed by the original libpng author, Guy Schalnat, nor by
-Andreas Dilger, who had taken over from Guy during 1996 and 1997, and
-distributed versions 0.89 through 0.96, but rather by another member
-of the original PNG Group, Glenn Randers-Pehrson. Guy and Andreas are
-still alive and well, but they have moved on to other things.
-
-The old libpng functions png_read_init(), png_write_init(),
-png_info_init(), png_read_destroy(), and png_write_destroy() have been
-moved to PNG_INTERNAL in version 0.95 to discourage their use. These
-functions will be removed from libpng version 2.0.0.
-
-The preferred method of creating and initializing the libpng structures is
-via the png_create_read_struct(), png_create_write_struct(), and
-png_create_info_struct() because they isolate the size of the structures
-from the application, allow version error checking, and also allow the
-use of custom error handling routines during the initialization, which
-the old functions do not. The functions png_read_destroy() and
-png_write_destroy() do not actually free the memory that libpng
-allocated for these structs, but just reset the data structures, so they
-can be used instead of png_destroy_read_struct() and
-png_destroy_write_struct() if you feel there is too much system overhead
-allocating and freeing the png_struct for each image read.
-
-Setting the error callbacks via png_set_message_fn() before
-png_read_init() as was suggested in libpng-0.88 is no longer supported
-because this caused applications that do not use custom error functions
-to fail if the png_ptr was not initialized to zero. It is still possible
-to set the error callbacks AFTER png_read_init(), or to change them with
-png_set_error_fn(), which is essentially the same function, but with a new
-name to force compilation errors with applications that try to use the old
-method.
-
-Starting with version 1.0.7, you can find out which version of the library
-you are using at run-time:
-
- png_uint_32 libpng_vn = png_access_version_number();
-
-The number libpng_vn is constructed from the major version, minor
-version with leading zero, and release number with leading zero,
-(e.g., libpng_vn for version 1.0.7 is 10007).
-
-You can also check which version of png.h you used when compiling your
-application:
-
- png_uint_32 application_vn = PNG_LIBPNG_VER;
-
-VIII. Changes to Libpng from version 1.0.x to 1.2.x
-
-Support for user memory management was enabled by default. To
-accomplish this, the functions png_create_read_struct_2(),
-png_create_write_struct_2(), png_set_mem_fn(), png_get_mem_ptr(),
-png_malloc_default(), and png_free_default() were added.
-
-Support for the iTXt chunk has been enabled by default as of
-version 1.2.41.
-
-Support for certain MNG features was enabled.
-
-Support for numbered error messages was added. However, we never got
-around to actually numbering the error messages. The function
-png_set_strip_error_numbers() was added (Note: the prototype for this
-function was inadvertently removed from png.h in PNG_NO_ASSEMBLER_CODE
-builds of libpng-1.2.15. It was restored in libpng-1.2.36).
-
-The png_malloc_warn() function was added at libpng-1.2.3. This issues
-a png_warning and returns NULL instead of aborting when it fails to
-acquire the requested memory allocation.
-
-Support for setting user limits on image width and height was enabled
-by default. The functions png_set_user_limits(), png_get_user_width_max(),
-and png_get_user_height_max() were added at libpng-1.2.6.
-
-The png_set_add_alpha() function was added at libpng-1.2.7.
-
-The function png_set_expand_gray_1_2_4_to_8() was added at libpng-1.2.9.
-Unlike png_set_gray_1_2_4_to_8(), the new function does not expand the
-tRNS chunk to alpha. The png_set_gray_1_2_4_to_8() function is
-deprecated.
-
-A number of macro definitions in support of runtime selection of
-assembler code features (especially Intel MMX code support) were
-added at libpng-1.2.0:
-
- PNG_ASM_FLAG_MMX_SUPPORT_COMPILED
- PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
- PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
- PNG_ASM_FLAG_MMX_READ_INTERLACE
- PNG_ASM_FLAG_MMX_READ_FILTER_SUB
- PNG_ASM_FLAG_MMX_READ_FILTER_UP
- PNG_ASM_FLAG_MMX_READ_FILTER_AVG
- PNG_ASM_FLAG_MMX_READ_FILTER_PAETH
- PNG_ASM_FLAGS_INITIALIZED
- PNG_MMX_READ_FLAGS
- PNG_MMX_FLAGS
- PNG_MMX_WRITE_FLAGS
- PNG_MMX_FLAGS
-
-We added the following functions in support of runtime
-selection of assembler code features:
-
- png_get_mmx_flagmask()
- png_set_mmx_thresholds()
- png_get_asm_flags()
- png_get_mmx_bitdepth_threshold()
- png_get_mmx_rowbytes_threshold()
- png_set_asm_flags()
-
-We replaced all of these functions with simple stubs in libpng-1.2.20,
-when the Intel assembler code was removed due to a licensing issue.
-
-These macros are deprecated:
-
- PNG_READ_TRANSFORMS_NOT_SUPPORTED
- PNG_PROGRESSIVE_READ_NOT_SUPPORTED
- PNG_NO_SEQUENTIAL_READ_SUPPORTED
- PNG_WRITE_TRANSFORMS_NOT_SUPPORTED
- PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED
- PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED
-
-They have been replaced, respectively, by:
-
- PNG_NO_READ_TRANSFORMS
- PNG_NO_PROGRESSIVE_READ
- PNG_NO_SEQUENTIAL_READ
- PNG_NO_WRITE_TRANSFORMS
- PNG_NO_READ_ANCILLARY_CHUNKS
- PNG_NO_WRITE_ANCILLARY_CHUNKS
-
-PNG_MAX_UINT was replaced with PNG_UINT_31_MAX. It has been
-deprecated since libpng-1.0.16 and libpng-1.2.6.
-
-The function
- png_check_sig(sig, num)
-was replaced with
- !png_sig_cmp(sig, 0, num)
-It has been deprecated since libpng-0.90.
-
-The function
- png_set_gray_1_2_4_to_8()
-which also expands tRNS to alpha was replaced with
- png_set_expand_gray_1_2_4_to_8()
-which does not. It has been deprecated since libpng-1.0.18 and 1.2.9.
-
-IX. Changes to Libpng from version 1.0.x/1.2.x to 1.4.x
-
-Private libpng prototypes and macro definitions were moved from
-png.h and pngconf.h into a new pngpriv.h header file.
-
-Functions png_set_benign_errors(), png_benign_error(), and
-png_chunk_benign_error() were added.
-
-Support for setting the maximum amount of memory that the application
-will allocate for reading chunks was added, as a security measure.
-The functions png_set_chunk_cache_max() and png_get_chunk_cache_max()
-were added to the library.
-
-We implemented support for I/O states by adding png_ptr member io_state
-and functions png_get_io_chunk_name() and png_get_io_state() in pngget.c
-
-We added PNG_TRANSFORM_GRAY_TO_RGB to the available high-level
-input transforms.
-
-Checking for and reporting of errors in the IHDR chunk is more thorough.
-
-Support for global arrays was removed, to improve thread safety.
-
-Some obsolete/deprecated macros and functions have been removed.
-
-Typecasted NULL definitions such as
- #define png_voidp_NULL (png_voidp)NULL
-were eliminated. If you used these in your application, just use
-NULL instead.
-
-The png_struct and info_struct members "trans" and "trans_values" were
-changed to "trans_alpha" and "trans_color", respectively.
-
-The obsolete, unused pnggccrd.c and pngvcrd.c files and related makefiles
-were removed.
-
-The PNG_1_0_X and PNG_1_2_X macros were eliminated.
-
-The PNG_LEGACY_SUPPORTED macro was eliminated.
-
-Many WIN32_WCE #ifdefs were removed.
-
-The functions png_read_init(info_ptr), png_write_init(info_ptr),
-png_info_init(info_ptr), png_read_destroy(), and png_write_destroy()
-have been removed. They have been deprecated since libpng-0.95.
-
-The png_permit_empty_plte() was removed. It has been deprecated
-since libpng-1.0.9. Use png_permit_mng_features() instead.
-
-We removed the obsolete stub functions png_get_mmx_flagmask(),
-png_set_mmx_thresholds(), png_get_asm_flags(),
-png_get_mmx_bitdepth_threshold(), png_get_mmx_rowbytes_threshold(),
-png_set_asm_flags(), and png_mmx_supported()
-
-We removed the obsolete png_check_sig(), png_memcpy_check(), and
-png_memset_check() functions. Instead use !png_sig_cmp(), png_memcpy(),
-and png_memset(), respectively.
-
-The function png_set_gray_1_2_4_to_8() was removed. It has been
-deprecated since libpng-1.0.18 and 1.2.9, when it was replaced with
-png_set_expand_gray_1_2_4_to_8() because the former function also
-expanded palette images.
-
-We changed the prototype for png_malloc() from
- png_malloc(png_structp png_ptr, png_uint_32 size)
-to
- png_malloc(png_structp png_ptr, png_alloc_size_t size)
-
-This also applies to the prototype for the user replacement malloc_fn().
-
-The png_calloc() function was added and is used in place of
-of "png_malloc(); png_memset();" except in the case in png_read_png()
-where the array consists of pointers; in this case a "for" loop is used
-after the png_malloc() to set the pointers to NULL, to give robust.
-behavior in case the application runs out of memory part-way through
-the process.
-
-We changed the prototypes of png_get_compression_buffer_size() and
-png_set_compression_buffer_size() to work with png_size_t instead of
-png_uint_32.
-
-Support for numbered error messages was removed by default, since we
-never got around to actually numbering the error messages. The function
-png_set_strip_error_numbers() was removed from the library by default.
-
-The png_zalloc() and png_zfree() functions are no longer exported.
-The png_zalloc() function no longer zeroes out the memory that it
-allocates.
-
-Support for dithering was disabled by default in libpng-1.4.0, because
-been well tested and doesn't actually "dither". The code was not
-removed, however, and could be enabled by building libpng with
-PNG_READ_DITHER_SUPPORTED defined. In libpng-1.4.2, this support
-was reenabled, but the function was renamed png_set_quantize() to
-reflect more accurately what it actually does. At the same time,
-the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros were also renamed to
-PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
-
-We removed the trailing '.' from the warning and error messages.
-
-X. Detecting libpng
-
-The png_get_io_ptr() function has been present since libpng-0.88, has never
-changed, and is unaffected by conditional compilation macros. It is the
-best choice for use in configure scripts for detecting the presence of any
-libpng version since 0.88. In an autoconf "configure.in" you could use
-
- AC_CHECK_LIB(png, png_get_io_ptr, ...
-
-XI. Source code repository
-
-Since about February 2009, version 1.2.34, libpng has been under "git" source
-control. The git repository was built from old libpng-x.y.z.tar.gz files
-going back to version 0.70. You can access the git repository (read only)
-at
-
- git://libpng.git.sourceforge.net/gitroot/libpng
-
-or you can browse it via "gitweb" at
-
- http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng
-
-Patches can be sent to glennrp at users.sourceforge.net or to
-png-mng-implement at lists.sourceforge.net or you can upload them to
-the libpng bug tracker at
-
- http://libpng.sourceforge.net
-
-XII. Coding style
-
-Our coding style is similar to the "Allman" style, with curly
-braces on separate lines:
-
- if (condition)
- {
- action;
- }
-
- else if (another condition)
- {
- another action;
- }
-
-The braces can be omitted from simple one-line actions:
-
- if (condition)
- return (0);
-
-We use 3-space indentation, except for continued statements which
-are usually indented the same as the first line of the statement
-plus four more spaces.
-
-For macro definitions we use 2-space indentation, always leaving the "#"
-in the first column.
-
- #ifndef PNG_NO_FEATURE
- # ifndef PNG_FEATURE_SUPPORTED
- # define PNG_FEATURE_SUPPORTED
- # endif
- #endif
-
-Comments appear with the leading "/*" at the same indentation as
-the statement that follows the comment:
-
- /* Single-line comment */
- statement;
-
- /* This is a multiple-line
- * comment.
- */
- statement;
-
-Very short comments can be placed after the end of the statement
-to which they pertain:
-
- statement; /* comment */
-
-We don't use C++ style ("//") comments. We have, however,
-used them in the past in some now-abandoned MMX assembler
-code.
-
-Functions and their curly braces are not indented, and
-exported functions are marked with PNGAPI:
-
- /* This is a public function that is visible to
- * application programers. It does thus-and-so.
- */
- void PNGAPI
- png_exported_function(png_ptr, png_info, foo)
- {
- body;
- }
-
-The prototypes for all exported functions appear in png.h,
-above the comment that says
-
- /* Maintainer: Put new public prototypes here ... */
-
-We mark all non-exported functions with "/* PRIVATE */"":
-
- void /* PRIVATE */
- png_non_exported_function(png_ptr, png_info, foo)
- {
- body;
- }
-
-The prototypes for non-exported functions (except for those in
-pngtest) appear in
-pngpriv.h
-above the comment that says
-
- /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
-
-The names of all exported functions and variables begin
-with "png_", and all publicly visible C preprocessor
-macros begin with "PNG_".
-
-We put a space after each comma and after each semicolon
-in "for" statments, and we put spaces before and after each
-C binary operator and after "for" or "while", and before
-"?". We don't put a space between a typecast and the expression
-being cast, nor do we put one between a function name and the
-left parenthesis that follows it:
-
- for (i = 2; i > 0; --i)
- y[i] = a(x) + (int)b;
-
-We prefer #ifdef and #ifndef to #if defined() and if !defined()
-when there is only one macro being tested.
-
-We do not use the TAB character for indentation in the C sources.
-
-Lines do not exceed 80 characters.
-
-Other rules can be inferred by inspecting the libpng source.
-
-XIII. Y2K Compliance in libpng
-
-September 23, 2010
-
-Since the PNG Development group is an ad-hoc body, we can't make
-an official declaration.
-
-This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.4.4 are Y2K compliant. It is my belief that earlier
-versions were also Y2K compliant.
-
-Libpng only has three year fields. One is a 2-byte unsigned integer that
-will hold years up to 65535. The other two hold the date in text
-format, and will hold years up to 9999.
-
-The integer is
- "png_uint_16 year" in png_time_struct.
-
-The strings are
- "png_charp time_buffer" in png_struct and
- "near_time_buffer", which is a local character string in png.c.
-
-There are seven time-related functions:
-
- png_convert_to_rfc_1123() in png.c
- (formerly png_convert_to_rfc_1152() in error)
- png_convert_from_struct_tm() in pngwrite.c, called
- in pngwrite.c
- png_convert_from_time_t() in pngwrite.c
- png_get_tIME() in pngget.c
- png_handle_tIME() in pngrutil.c, called in pngread.c
- png_set_tIME() in pngset.c
- png_write_tIME() in pngwutil.c, called in pngwrite.c
-
-All appear to handle dates properly in a Y2K environment. The
-png_convert_from_time_t() function calls gmtime() to convert from system
-clock time, which returns (year - 1900), which we properly convert to
-the full 4-digit year. There is a possibility that applications using
-libpng are not passing 4-digit years into the png_convert_to_rfc_1123()
-function, or that they are incorrectly passing only a 2-digit year
-instead of "year - 1900" into the png_convert_from_struct_tm() function,
-but this is not under our control. The libpng documentation has always
-stated that it works with 4-digit years, and the APIs have been
-documented as such.
-
-The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned
-integer to hold the year, and can hold years as large as 65535.
-
-zlib, upon which libpng depends, is also Y2K compliant. It contains
-no date-related code.
-
-
- Glenn Randers-Pehrson
- libpng maintainer
- PNG Development Group
+++ /dev/null
-
-/* png.c - location for general purpose libpng functions
- *
- * Last changed in libpng 1.5.1 [February 3, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-#include "pngpriv.h"
-
-/* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_2 Your_png_h_is_not_version_1_5_2;
-
-/* Tells libpng that we have already handled the first "num_bytes" bytes
- * of the PNG file signature. If the PNG data is embedded into another
- * stream we can set num_bytes = 8 so that libpng will not attempt to read
- * or write any of the magic bytes before it starts on the IHDR.
- */
-
-#ifdef PNG_READ_SUPPORTED
-void PNGAPI
-png_set_sig_bytes(png_structp png_ptr, int num_bytes)
-{
- png_debug(1, "in png_set_sig_bytes");
-
- if (png_ptr == NULL)
- return;
-
- if (num_bytes > 8)
- png_error(png_ptr, "Too many bytes for PNG signature");
-
- png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes);
-}
-
-/* Checks whether the supplied bytes match the PNG signature. We allow
- * checking less than the full 8-byte signature so that those apps that
- * already read the first few bytes of a file to determine the file type
- * can simply check the remaining bytes for extra assurance. Returns
- * an integer less than, equal to, or greater than zero if sig is found,
- * respectively, to be less than, to match, or be greater than the correct
- * PNG signature (this is the same behaviour as strcmp, memcmp, etc).
- */
-int PNGAPI
-png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check)
-{
- png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
-
- if (num_to_check > 8)
- num_to_check = 8;
-
- else if (num_to_check < 1)
- return (-1);
-
- if (start > 7)
- return (-1);
-
- if (start + num_to_check > 8)
- num_to_check = 8 - start;
-
- return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
-}
-
-#endif /* PNG_READ_SUPPORTED */
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-/* Function to allocate memory for zlib */
-PNG_FUNCTION(voidpf /* PRIVATE */,
-png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED)
-{
- png_voidp ptr;
- png_structp p=(png_structp)png_ptr;
- png_uint_32 save_flags=p->flags;
- png_alloc_size_t num_bytes;
-
- if (png_ptr == NULL)
- return (NULL);
-
- if (items > PNG_UINT_32_MAX/size)
- {
- png_warning (p, "Potential overflow in png_zalloc()");
- return (NULL);
- }
- num_bytes = (png_alloc_size_t)items * size;
-
- p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
- ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
- p->flags=save_flags;
-
- return ((voidpf)ptr);
-}
-
-/* Function to free memory for zlib */
-void /* PRIVATE */
-png_zfree(voidpf png_ptr, voidpf ptr)
-{
- png_free((png_structp)png_ptr, (png_voidp)ptr);
-}
-
-/* Reset the CRC variable to 32 bits of 1's. Care must be taken
- * in case CRC is > 32 bits to leave the top bits 0.
- */
-void /* PRIVATE */
-png_reset_crc(png_structp png_ptr)
-{
- png_ptr->crc = crc32(0, Z_NULL, 0);
-}
-
-/* Calculate the CRC over a section of data. We can only pass as
- * much data to this routine as the largest single buffer size. We
- * also check that this data will actually be used before going to the
- * trouble of calculating it.
- */
-void /* PRIVATE */
-png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length)
-{
- int need_crc = 1;
-
- if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
- {
- if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
- (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
- need_crc = 0;
- }
-
- else /* critical */
- {
- if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
- need_crc = 0;
- }
-
- if (need_crc)
- png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
-}
-
-/* Allocate the memory for an info_struct for the application. We don't
- * really need the png_ptr, but it could potentially be useful in the
- * future. This should be used in favour of malloc(png_sizeof(png_info))
- * and png_info_init() so that applications that want to use a shared
- * libpng don't have to be recompiled if png_info changes size.
- */
-PNG_FUNCTION(png_infop,PNGAPI
-png_create_info_struct,(png_structp png_ptr),PNG_ALLOCATED)
-{
- png_infop info_ptr;
-
- png_debug(1, "in png_create_info_struct");
-
- if (png_ptr == NULL)
- return (NULL);
-
-#ifdef PNG_USER_MEM_SUPPORTED
- info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
- png_ptr->malloc_fn, png_ptr->mem_ptr);
-#else
- info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
-#endif
- if (info_ptr != NULL)
- png_info_init_3(&info_ptr, png_sizeof(png_info));
-
- return (info_ptr);
-}
-
-/* This function frees the memory associated with a single info struct.
- * Normally, one would use either png_destroy_read_struct() or
- * png_destroy_write_struct() to free an info struct, but this may be
- * useful for some applications.
- */
-void PNGAPI
-png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
-{
- png_infop info_ptr = NULL;
-
- png_debug(1, "in png_destroy_info_struct");
-
- if (png_ptr == NULL)
- return;
-
- if (info_ptr_ptr != NULL)
- info_ptr = *info_ptr_ptr;
-
- if (info_ptr != NULL)
- {
- png_info_destroy(png_ptr, info_ptr);
-
-#ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
- png_ptr->mem_ptr);
-#else
- png_destroy_struct((png_voidp)info_ptr);
-#endif
- *info_ptr_ptr = NULL;
- }
-}
-
-/* Initialize the info structure. This is now an internal function (0.89)
- * and applications using it are urged to use png_create_info_struct()
- * instead.
- */
-
-void PNGAPI
-png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
-{
- png_infop info_ptr = *ptr_ptr;
-
- png_debug(1, "in png_info_init_3");
-
- if (info_ptr == NULL)
- return;
-
- if (png_sizeof(png_info) > png_info_struct_size)
- {
- png_destroy_struct(info_ptr);
- info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
- *ptr_ptr = info_ptr;
- }
-
- /* Set everything to 0 */
- png_memset(info_ptr, 0, png_sizeof(png_info));
-}
-
-void PNGAPI
-png_data_freer(png_structp png_ptr, png_infop info_ptr,
- int freer, png_uint_32 mask)
-{
- png_debug(1, "in png_data_freer");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- if (freer == PNG_DESTROY_WILL_FREE_DATA)
- info_ptr->free_me |= mask;
-
- else if (freer == PNG_USER_WILL_FREE_DATA)
- info_ptr->free_me &= ~mask;
-
- else
- png_warning(png_ptr,
- "Unknown freer parameter in png_data_freer");
-}
-
-void PNGAPI
-png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
- int num)
-{
- png_debug(1, "in png_free_data");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
-#ifdef PNG_TEXT_SUPPORTED
- /* Free text item num or (if num == -1) all text items */
- if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
- {
- if (num != -1)
- {
- if (info_ptr->text && info_ptr->text[num].key)
- {
- png_free(png_ptr, info_ptr->text[num].key);
- info_ptr->text[num].key = NULL;
- }
- }
-
- else
- {
- int i;
- for (i = 0; i < info_ptr->num_text; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
- png_free(png_ptr, info_ptr->text);
- info_ptr->text = NULL;
- info_ptr->num_text=0;
- }
- }
-#endif
-
-#ifdef PNG_tRNS_SUPPORTED
- /* Free any tRNS entry */
- if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
- {
- png_free(png_ptr, info_ptr->trans_alpha);
- info_ptr->trans_alpha = NULL;
- info_ptr->valid &= ~PNG_INFO_tRNS;
- }
-#endif
-
-#ifdef PNG_sCAL_SUPPORTED
- /* Free any sCAL entry */
- if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
- {
-#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
- png_free(png_ptr, info_ptr->scal_s_width);
- png_free(png_ptr, info_ptr->scal_s_height);
- info_ptr->scal_s_width = NULL;
- info_ptr->scal_s_height = NULL;
-#endif
- info_ptr->valid &= ~PNG_INFO_sCAL;
- }
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
- /* Free any pCAL entry */
- if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
- {
- png_free(png_ptr, info_ptr->pcal_purpose);
- png_free(png_ptr, info_ptr->pcal_units);
- info_ptr->pcal_purpose = NULL;
- info_ptr->pcal_units = NULL;
- if (info_ptr->pcal_params != NULL)
- {
- int i;
- for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
- {
- png_free(png_ptr, info_ptr->pcal_params[i]);
- info_ptr->pcal_params[i] = NULL;
- }
- png_free(png_ptr, info_ptr->pcal_params);
- info_ptr->pcal_params = NULL;
- }
- info_ptr->valid &= ~PNG_INFO_pCAL;
- }
-#endif
-
-#ifdef PNG_iCCP_SUPPORTED
- /* Free any iCCP entry */
- if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
- {
- png_free(png_ptr, info_ptr->iccp_name);
- png_free(png_ptr, info_ptr->iccp_profile);
- info_ptr->iccp_name = NULL;
- info_ptr->iccp_profile = NULL;
- info_ptr->valid &= ~PNG_INFO_iCCP;
- }
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
- /* Free a given sPLT entry, or (if num == -1) all sPLT entries */
- if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
- {
- if (num != -1)
- {
- if (info_ptr->splt_palettes)
- {
- png_free(png_ptr, info_ptr->splt_palettes[num].name);
- png_free(png_ptr, info_ptr->splt_palettes[num].entries);
- info_ptr->splt_palettes[num].name = NULL;
- info_ptr->splt_palettes[num].entries = NULL;
- }
- }
-
- else
- {
- if (info_ptr->splt_palettes_num)
- {
- int i;
- for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
-
- png_free(png_ptr, info_ptr->splt_palettes);
- info_ptr->splt_palettes = NULL;
- info_ptr->splt_palettes_num = 0;
- }
- info_ptr->valid &= ~PNG_INFO_sPLT;
- }
- }
-#endif
-
-#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
- if (png_ptr->unknown_chunk.data)
- {
- png_free(png_ptr, png_ptr->unknown_chunk.data);
- png_ptr->unknown_chunk.data = NULL;
- }
-
- if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
- {
- if (num != -1)
- {
- if (info_ptr->unknown_chunks)
- {
- png_free(png_ptr, info_ptr->unknown_chunks[num].data);
- info_ptr->unknown_chunks[num].data = NULL;
- }
- }
-
- else
- {
- int i;
-
- if (info_ptr->unknown_chunks_num)
- {
- for (i = 0; i < info_ptr->unknown_chunks_num; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
-
- png_free(png_ptr, info_ptr->unknown_chunks);
- info_ptr->unknown_chunks = NULL;
- info_ptr->unknown_chunks_num = 0;
- }
- }
- }
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
- /* Free any hIST entry */
- if ((mask & PNG_FREE_HIST) & info_ptr->free_me)
- {
- png_free(png_ptr, info_ptr->hist);
- info_ptr->hist = NULL;
- info_ptr->valid &= ~PNG_INFO_hIST;
- }
-#endif
-
- /* Free any PLTE entry that was internally allocated */
- if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
- {
- png_zfree(png_ptr, info_ptr->palette);
- info_ptr->palette = NULL;
- info_ptr->valid &= ~PNG_INFO_PLTE;
- info_ptr->num_palette = 0;
- }
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
- /* Free any image bits attached to the info structure */
- if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
- {
- if (info_ptr->row_pointers)
- {
- int row;
- for (row = 0; row < (int)info_ptr->height; row++)
- {
- png_free(png_ptr, info_ptr->row_pointers[row]);
- info_ptr->row_pointers[row] = NULL;
- }
- png_free(png_ptr, info_ptr->row_pointers);
- info_ptr->row_pointers = NULL;
- }
- info_ptr->valid &= ~PNG_INFO_IDAT;
- }
-#endif
-
- if (num != -1)
- mask &= ~PNG_FREE_MUL;
-
- info_ptr->free_me &= ~mask;
-}
-
-/* This is an internal routine to free any memory that the info struct is
- * pointing to before re-using it or freeing the struct itself. Recall
- * that png_free() checks for NULL pointers for us.
- */
-void /* PRIVATE */
-png_info_destroy(png_structp png_ptr, png_infop info_ptr)
-{
- png_debug(1, "in png_info_destroy");
-
- png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (png_ptr->num_chunk_list)
- {
- png_free(png_ptr, png_ptr->chunk_list);
- png_ptr->chunk_list = NULL;
- png_ptr->num_chunk_list = 0;
- }
-#endif
-
- png_info_init_3(&info_ptr, png_sizeof(png_info));
-}
-#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
-
-/* This function returns a pointer to the io_ptr associated with the user
- * functions. The application should free any memory associated with this
- * pointer before png_write_destroy() or png_read_destroy() are called.
- */
-png_voidp PNGAPI
-png_get_io_ptr(png_structp png_ptr)
-{
- if (png_ptr == NULL)
- return (NULL);
-
- return (png_ptr->io_ptr);
-}
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-# ifdef PNG_STDIO_SUPPORTED
-/* Initialize the default input/output functions for the PNG file. If you
- * use your own read or write routines, you can call either png_set_read_fn()
- * or png_set_write_fn() instead of png_init_io(). If you have defined
- * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't
- * necessarily available.
- */
-void PNGAPI
-png_init_io(png_structp png_ptr, png_FILE_p fp)
-{
- png_debug(1, "in png_init_io");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->io_ptr = (png_voidp)fp;
-}
-# endif
-
-# ifdef PNG_TIME_RFC1123_SUPPORTED
-/* Convert the supplied time into an RFC 1123 string suitable for use in
- * a "Creation Time" or other text-based time string.
- */
-png_const_charp PNGAPI
-png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime)
-{
- static PNG_CONST char short_months[12][4] =
- {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
-
- if (png_ptr == NULL)
- return (NULL);
-
- if (png_ptr->time_buffer == NULL)
- {
- png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
- png_sizeof(char)));
- }
-
-# ifdef USE_FAR_KEYWORD
- {
- char near_time_buf[29];
- png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000",
- ptime->day % 32, short_months[(ptime->month - 1) % 12],
- ptime->year, ptime->hour % 24, ptime->minute % 60,
- ptime->second % 61);
- png_memcpy(png_ptr->time_buffer, near_time_buf,
- 29*png_sizeof(char));
- }
-# else
- png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000",
- ptime->day % 32, short_months[(ptime->month - 1) % 12],
- ptime->year, ptime->hour % 24, ptime->minute % 60,
- ptime->second % 61);
-# endif
- return png_ptr->time_buffer;
-}
-# endif /* PNG_TIME_RFC1123_SUPPORTED */
-
-#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
-
-png_const_charp PNGAPI
-png_get_copyright(png_const_structp png_ptr)
-{
- PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
-#ifdef PNG_STRING_COPYRIGHT
- return PNG_STRING_COPYRIGHT
-#else
-# ifdef __STDC__
- return PNG_STRING_NEWLINE \
- "libpng version 1.5.2 - March 31, 2011" PNG_STRING_NEWLINE \
- "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
- "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
- "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
- PNG_STRING_NEWLINE;
-# else
- return "libpng version 1.5.2 - March 31, 2011\
- Copyright (c) 1998-2011 Glenn Randers-Pehrson\
- Copyright (c) 1996-1997 Andreas Dilger\
- Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
-# endif
-#endif
-}
-
-/* The following return the library version as a short string in the
- * format 1.0.0 through 99.99.99zz. To get the version of *.h files
- * used with your application, print out PNG_LIBPNG_VER_STRING, which
- * is defined in png.h.
- * Note: now there is no difference between png_get_libpng_ver() and
- * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard,
- * it is guaranteed that png.c uses the correct version of png.h.
- */
-png_const_charp PNGAPI
-png_get_libpng_ver(png_const_structp png_ptr)
-{
- /* Version of *.c files used when building libpng */
- return png_get_header_ver(png_ptr);
-}
-
-png_const_charp PNGAPI
-png_get_header_ver(png_const_structp png_ptr)
-{
- /* Version of *.h files used when building libpng */
- PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
- return PNG_LIBPNG_VER_STRING;
-}
-
-png_const_charp PNGAPI
-png_get_header_version(png_const_structp png_ptr)
-{
- /* Returns longer string containing both version and date */
- PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
-#ifdef __STDC__
- return PNG_HEADER_VERSION_STRING
-# ifndef PNG_READ_SUPPORTED
- " (NO READ SUPPORT)"
-# endif
- PNG_STRING_NEWLINE;
-#else
- return PNG_HEADER_VERSION_STRING;
-#endif
-}
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-int PNGAPI
-png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name)
-{
- /* Check chunk_name and return "keep" value if it's on the list, else 0 */
- int i;
- png_bytep p;
- if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
- return 0;
-
- p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5;
- for (i = png_ptr->num_chunk_list; i; i--, p -= 5)
- if (!png_memcmp(chunk_name, p, 4))
- return ((int)*(p + 4));
- return 0;
-}
-# endif
-#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
-
-#ifdef PNG_READ_SUPPORTED
-/* This function, added to libpng-1.0.6g, is untested. */
-int PNGAPI
-png_reset_zstream(png_structp png_ptr)
-{
- if (png_ptr == NULL)
- return Z_STREAM_ERROR;
-
- return (inflateReset(&png_ptr->zstream));
-}
-#endif /* PNG_READ_SUPPORTED */
-
-/* This function was added to libpng-1.0.7 */
-png_uint_32 PNGAPI
-png_access_version_number(void)
-{
- /* Version of *.c files used when building libpng */
- return((png_uint_32)PNG_LIBPNG_VER);
-}
-
-
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-# ifdef PNG_SIZE_T
-/* Added at libpng version 1.2.6 */
- PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
-png_size_t PNGAPI
-png_convert_size(size_t size)
-{
- if (size > (png_size_t)-1)
- PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
-
- return ((png_size_t)size);
-}
-# endif /* PNG_SIZE_T */
-
-/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */
-# ifdef PNG_CHECK_cHRM_SUPPORTED
-
-int /* PRIVATE */
-png_check_cHRM_fixed(png_structp png_ptr,
- png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
- png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
- png_fixed_point blue_x, png_fixed_point blue_y)
-{
- int ret = 1;
- unsigned long xy_hi,xy_lo,yx_hi,yx_lo;
-
- png_debug(1, "in function png_check_cHRM_fixed");
-
- if (png_ptr == NULL)
- return 0;
-
- if (white_x < 0 || white_y <= 0 ||
- red_x < 0 || red_y < 0 ||
- green_x < 0 || green_y < 0 ||
- blue_x < 0 || blue_y < 0)
- {
- png_warning(png_ptr,
- "Ignoring attempt to set negative chromaticity value");
- ret = 0;
- }
- if (white_x > (png_fixed_point)PNG_UINT_31_MAX ||
- white_y > (png_fixed_point)PNG_UINT_31_MAX ||
- red_x > (png_fixed_point)PNG_UINT_31_MAX ||
- red_y > (png_fixed_point)PNG_UINT_31_MAX ||
- green_x > (png_fixed_point)PNG_UINT_31_MAX ||
- green_y > (png_fixed_point)PNG_UINT_31_MAX ||
- blue_x > (png_fixed_point)PNG_UINT_31_MAX ||
- blue_y > (png_fixed_point)PNG_UINT_31_MAX )
- {
- png_warning(png_ptr,
- "Ignoring attempt to set chromaticity value exceeding 21474.83");
- ret = 0;
- }
- if (white_x > 100000L - white_y)
- {
- png_warning(png_ptr, "Invalid cHRM white point");
- ret = 0;
- }
-
- if (red_x > 100000L - red_y)
- {
- png_warning(png_ptr, "Invalid cHRM red point");
- ret = 0;
- }
-
- if (green_x > 100000L - green_y)
- {
- png_warning(png_ptr, "Invalid cHRM green point");
- ret = 0;
- }
-
- if (blue_x > 100000L - blue_y)
- {
- png_warning(png_ptr, "Invalid cHRM blue point");
- ret = 0;
- }
-
- png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo);
- png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo);
-
- if (xy_hi == yx_hi && xy_lo == yx_lo)
- {
- png_warning(png_ptr,
- "Ignoring attempt to set cHRM RGB triangle with zero area");
- ret = 0;
- }
-
- return ret;
-}
-# endif /* PNG_CHECK_cHRM_SUPPORTED */
-
-void /* PRIVATE */
-png_check_IHDR(png_structp png_ptr,
- png_uint_32 width, png_uint_32 height, int bit_depth,
- int color_type, int interlace_type, int compression_type,
- int filter_type)
-{
- int error = 0;
-
- /* Check for width and height valid values */
- if (width == 0)
- {
- png_warning(png_ptr, "Image width is zero in IHDR");
- error = 1;
- }
-
- if (height == 0)
- {
- png_warning(png_ptr, "Image height is zero in IHDR");
- error = 1;
- }
-
-# ifdef PNG_SET_USER_LIMITS_SUPPORTED
- if (width > png_ptr->user_width_max || width > PNG_USER_WIDTH_MAX)
-
-# else
- if (width > PNG_USER_WIDTH_MAX)
-# endif
- {
- png_warning(png_ptr, "Image width exceeds user limit in IHDR");
- error = 1;
- }
-
-# ifdef PNG_SET_USER_LIMITS_SUPPORTED
- if (height > png_ptr->user_height_max || height > PNG_USER_HEIGHT_MAX)
-# else
- if (height > PNG_USER_HEIGHT_MAX)
-# endif
- {
- png_warning(png_ptr, "Image height exceeds user limit in IHDR");
- error = 1;
- }
-
- if (width > PNG_UINT_31_MAX)
- {
- png_warning(png_ptr, "Invalid image width in IHDR");
- error = 1;
- }
-
- if (height > PNG_UINT_31_MAX)
- {
- png_warning(png_ptr, "Invalid image height in IHDR");
- error = 1;
- }
-
- if (width > (PNG_UINT_32_MAX
- >> 3) /* 8-byte RGBA pixels */
- - 48 /* bigrowbuf hack */
- - 1 /* filter byte */
- - 7*8 /* rounding of width to multiple of 8 pixels */
- - 8) /* extra max_pixel_depth pad */
- png_warning(png_ptr, "Width is too large for libpng to process pixels");
-
- /* Check other values */
- if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
- bit_depth != 8 && bit_depth != 16)
- {
- png_warning(png_ptr, "Invalid bit depth in IHDR");
- error = 1;
- }
-
- if (color_type < 0 || color_type == 1 ||
- color_type == 5 || color_type > 6)
- {
- png_warning(png_ptr, "Invalid color type in IHDR");
- error = 1;
- }
-
- if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
- ((color_type == PNG_COLOR_TYPE_RGB ||
- color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
- color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
- {
- png_warning(png_ptr, "Invalid color type/bit depth combination in IHDR");
- error = 1;
- }
-
- if (interlace_type >= PNG_INTERLACE_LAST)
- {
- png_warning(png_ptr, "Unknown interlace method in IHDR");
- error = 1;
- }
-
- if (compression_type != PNG_COMPRESSION_TYPE_BASE)
- {
- png_warning(png_ptr, "Unknown compression method in IHDR");
- error = 1;
- }
-
-# ifdef PNG_MNG_FEATURES_SUPPORTED
- /* Accept filter_method 64 (intrapixel differencing) only if
- * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
- * 2. Libpng did not read a PNG signature (this filter_method is only
- * used in PNG datastreams that are embedded in MNG datastreams) and
- * 3. The application called png_permit_mng_features with a mask that
- * included PNG_FLAG_MNG_FILTER_64 and
- * 4. The filter_method is 64 and
- * 5. The color_type is RGB or RGBA
- */
- if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) &&
- png_ptr->mng_features_permitted)
- png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
-
- if (filter_type != PNG_FILTER_TYPE_BASE)
- {
- if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
- ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) &&
- (color_type == PNG_COLOR_TYPE_RGB ||
- color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
- {
- png_warning(png_ptr, "Unknown filter method in IHDR");
- error = 1;
- }
-
- if (png_ptr->mode & PNG_HAVE_PNG_SIGNATURE)
- {
- png_warning(png_ptr, "Invalid filter method in IHDR");
- error = 1;
- }
- }
-
-# else
- if (filter_type != PNG_FILTER_TYPE_BASE)
- {
- png_warning(png_ptr, "Unknown filter method in IHDR");
- error = 1;
- }
-# endif
-
- if (error == 1)
- png_error(png_ptr, "Invalid IHDR data");
-}
-
-#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED)
-/* ASCII to fp functions */
-/* Check an ASCII formated floating point value, see the more detailed
- * comments in pngpriv.h
- */
-/* The following is used internally to preserve the 'valid' flag */
-#define png_fp_add(state, flags) ((state) |= (flags))
-#define png_fp_set(state, value)\
- ((state) = (value) | ((state) & PNG_FP_WAS_VALID))
-
-/* Internal type codes: bits above the base state! */
-#define PNG_FP_SIGN 0 /* [+-] */
-#define PNG_FP_DOT 4 /* . */
-#define PNG_FP_DIGIT 8 /* [0123456789] */
-#define PNG_FP_E 12 /* [Ee] */
-
-int /* PRIVATE */
-png_check_fp_number(png_const_charp string, png_size_t size, int *statep,
- png_size_tp whereami)
-{
- int state = *statep;
- png_size_t i = *whereami;
-
- while (i < size)
- {
- int type;
- /* First find the type of the next character */
- {
- char ch = string[i];
-
- if (ch >= 48 && ch <= 57)
- type = PNG_FP_DIGIT;
-
- else switch (ch)
- {
- case 43: case 45: type = PNG_FP_SIGN; break;
- case 46: type = PNG_FP_DOT; break;
- case 69: case 101: type = PNG_FP_E; break;
- default: goto PNG_FP_End;
- }
- }
-
- /* Now deal with this type according to the current
- * state, the type is arranged to not overlap the
- * bits of the PNG_FP_STATE.
- */
- switch ((state & PNG_FP_STATE) + type)
- {
- case PNG_FP_INTEGER + PNG_FP_SIGN:
- if (state & PNG_FP_SAW_ANY)
- goto PNG_FP_End; /* not a part of the number */
-
- png_fp_add(state, PNG_FP_SAW_SIGN);
- break;
-
- case PNG_FP_INTEGER + PNG_FP_DOT:
- /* Ok as trailer, ok as lead of fraction. */
- if (state & PNG_FP_SAW_DOT) /* two dots */
- goto PNG_FP_End;
-
- else if (state & PNG_FP_SAW_DIGIT) /* trailing dot? */
- png_fp_add(state, PNG_FP_SAW_DOT);
-
- else
- png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT);
-
- break;
-
- case PNG_FP_INTEGER + PNG_FP_DIGIT:
- if (state & PNG_FP_SAW_DOT) /* delayed fraction */
- png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT);
-
- png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
-
- break;
- case PNG_FP_INTEGER + PNG_FP_E:
- if ((state & PNG_FP_SAW_DIGIT) == 0)
- goto PNG_FP_End;
-
- png_fp_set(state, PNG_FP_EXPONENT);
-
- break;
-
- /* case PNG_FP_FRACTION + PNG_FP_SIGN:
- goto PNG_FP_End; ** no sign in exponent */
-
- /* case PNG_FP_FRACTION + PNG_FP_DOT:
- goto PNG_FP_End; ** Because SAW_DOT is always set */
-
- case PNG_FP_FRACTION + PNG_FP_DIGIT:
- png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
- break;
-
- case PNG_FP_FRACTION + PNG_FP_E:
- /* This is correct because the trailing '.' on an
- * integer is handled above - so we can only get here
- * with the sequence ".E" (with no preceding digits).
- */
- if ((state & PNG_FP_SAW_DIGIT) == 0)
- goto PNG_FP_End;
-
- png_fp_set(state, PNG_FP_EXPONENT);
-
- break;
-
- case PNG_FP_EXPONENT + PNG_FP_SIGN:
- if (state & PNG_FP_SAW_ANY)
- goto PNG_FP_End; /* not a part of the number */
-
- png_fp_add(state, PNG_FP_SAW_SIGN);
-
- break;
-
- /* case PNG_FP_EXPONENT + PNG_FP_DOT:
- goto PNG_FP_End; */
-
- case PNG_FP_EXPONENT + PNG_FP_DIGIT:
- png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
-
- break;
-
- /* case PNG_FP_EXPONEXT + PNG_FP_E:
- goto PNG_FP_End; */
-
- default: goto PNG_FP_End; /* I.e. break 2 */
- }
-
- /* The character seems ok, continue. */
- ++i;
- }
-
-PNG_FP_End:
- /* Here at the end, update the state and return the correct
- * return code.
- */
- *statep = state;
- *whereami = i;
-
- return (state & PNG_FP_SAW_DIGIT) != 0;
-}
-
-
-/* The same but for a complete string. */
-int
-png_check_fp_string(png_const_charp string, png_size_t size)
-{
- int state=0;
- png_size_t char_index=0;
-
- return png_check_fp_number(string, size, &state, &char_index) &&
- (char_index == size || string[char_index] == 0);
-}
-#endif /* pCAL or sCAL */
-
-#ifdef PNG_READ_sCAL_SUPPORTED
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-/* Utility used below - a simple accurate power of ten from an integral
- * exponent.
- */
-static double
-png_pow10(int power)
-{
- int recip = 0;
- double d = 1;
-
- /* Handle negative exponent with a reciprocal at the end because
- * 10 is exact whereas .1 is inexact in base 2
- */
- if (power < 0)
- {
- if (power < DBL_MIN_10_EXP) return 0;
- recip = 1, power = -power;
- }
-
- if (power > 0)
- {
- /* Decompose power bitwise. */
- double mult = 10;
- do
- {
- if (power & 1) d *= mult;
- mult *= mult;
- power >>= 1;
- }
- while (power > 0);
-
- if (recip) d = 1/d;
- }
- /* else power is 0 and d is 1 */
-
- return d;
-}
-
-/* Function to format a floating point value in ASCII with a given
- * precision.
- */
-void /* PRIVATE */
-png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
- double fp, unsigned int precision)
-{
- /* We use standard functions from math.h, but not printf because
- * that would require stdio. The caller must supply a buffer of
- * sufficient size or we will png_error. The tests on size and
- * the space in ascii[] consumed are indicated below.
- */
- if (precision < 1)
- precision = DBL_DIG;
-
- /* Enforce the limit of the implementation precision too. */
- if (precision > DBL_DIG+1)
- precision = DBL_DIG+1;
-
- /* Basic sanity checks */
- if (size >= precision+5) /* See the requirements below. */
- {
- if (fp < 0)
- {
- fp = -fp;
- *ascii++ = 45; /* '-' PLUS 1 TOTAL 1*/
- --size;
- }
-
- if (fp >= DBL_MIN && fp <= DBL_MAX)
- {
- int exp_b10; /* A base 10 exponent */
- double base; /* 10^exp_b10 */
-
- /* First extract a base 10 exponent of the number,
- * the calculation below rounds down when converting
- * from base 2 to base 10 (multiply by log10(2) -
- * 0.3010, but 77/256 is 0.3008, so exp_b10 needs to
- * be increased. Note that the arithmetic shift
- * performs a floor() unlike C arithmetic - using a
- * C multiply would break the following for negative
- * exponents.
- */
- (void)frexp(fp, &exp_b10); /* exponent to base 2 */
-
- exp_b10 = (exp_b10 * 77) >> 8; /* <= exponent to base 10 */
-
- /* Avoid underflow here. */
- base = png_pow10(exp_b10); /* May underflow */
-
- while (base < DBL_MIN || base < fp)
- {
- /* And this may overflow. */
- double test = png_pow10(exp_b10+1);
-
- if (test <= DBL_MAX)
- ++exp_b10, base = test;
-
- else
- break;
- }
-
- /* Normalize fp and correct exp_b10, after this fp is in the
- * range [.1,1) and exp_b10 is both the exponent and the digit
- * *before* which the decimal point should be inserted
- * (starting with 0 for the first digit). Note that this
- * works even if 10^exp_b10 is out of range because of the
- * test on DBL_MAX above.
- */
- fp /= base;
- while (fp >= 1) fp /= 10, ++exp_b10;
-
- /* Because of the code above fp may, at this point, be
- * less than .1, this is ok because the code below can
- * handle the leading zeros this generates, so no attempt
- * is made to correct that here.
- */
-
- {
- int czero, clead, cdigits;
- char exponent[10];
-
- /* Allow up to two leading zeros - this will not lengthen
- * the number compared to using E-n.
- */
- if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */
- {
- czero = -exp_b10; /* PLUS 2 digits: TOTAL 3 */
- exp_b10 = 0; /* Dot added below before first output. */
- }
- else
- czero = 0; /* No zeros to add */
-
- /* Generate the digit list, stripping trailing zeros and
- * inserting a '.' before a digit if the exponent is 0.
- */
- clead = czero; /* Count of leading zeros */
- cdigits = 0; /* Count of digits in list. */
-
- do
- {
- double d;
-
- fp *= 10;
- /* Use modf here, not floor and subtract, so that
- * the separation is done in one step. At the end
- * of the loop don't break the number into parts so
- * that the final digit is rounded.
- */
- if (cdigits+czero-clead+1 < (int)precision)
- fp = modf(fp, &d);
-
- else
- {
- d = floor(fp + .5);
-
- if (d > 9)
- {
- /* Rounding up to 10, handle that here. */
- if (czero > 0)
- {
- --czero, d = 1;
- if (cdigits == 0) --clead;
- }
- else
- {
- while (cdigits > 0 && d > 9)
- {
- int ch = *--ascii;
-
- if (exp_b10 != (-1))
- ++exp_b10;
-
- else if (ch == 46)
- {
- ch = *--ascii, ++size;
- /* Advance exp_b10 to '1', so that the
- * decimal point happens after the
- * previous digit.
- */
- exp_b10 = 1;
- }
-
- --cdigits;
- d = ch - 47; /* I.e. 1+(ch-48) */
- }
-
- /* Did we reach the beginning? If so adjust the
- * exponent but take into account the leading
- * decimal point.
- */
- if (d > 9) /* cdigits == 0 */
- {
- if (exp_b10 == (-1))
- {
- /* Leading decimal point (plus zeros?), if
- * we lose the decimal point here it must
- * be reentered below.
- */
- int ch = *--ascii;
-
- if (ch == 46)
- ++size, exp_b10 = 1;
-
- /* Else lost a leading zero, so 'exp_b10' is
- * still ok at (-1)
- */
- }
- else
- ++exp_b10;
-
- /* In all cases we output a '1' */
- d = 1;
- }
- }
- }
- fp = 0; /* Guarantees termination below. */
- }
-
- if (d == 0)
- {
- ++czero;
- if (cdigits == 0) ++clead;
- }
- else
- {
- /* Included embedded zeros in the digit count. */
- cdigits += czero - clead;
- clead = 0;
-
- while (czero > 0)
- {
- /* exp_b10 == (-1) means we just output the decimal
- * place - after the DP don't adjust 'exp_b10' any
- * more!
- */
- if (exp_b10 != (-1))
- {
- if (exp_b10 == 0) *ascii++ = 46, --size;
- /* PLUS 1: TOTAL 4 */
- --exp_b10;
- }
- *ascii++ = 48, --czero;
- }
-
- if (exp_b10 != (-1))
- {
- if (exp_b10 == 0) *ascii++ = 46, --size; /* counted
- above */
- --exp_b10;
- }
- *ascii++ = (char)(48 + (int)d), ++cdigits;
- }
- }
- while (cdigits+czero-clead < (int)precision && fp > DBL_MIN);
-
- /* The total output count (max) is now 4+precision */
-
- /* Check for an exponent, if we don't need one we are
- * done and just need to terminate the string. At
- * this point exp_b10==(-1) is effectively if flag - it got
- * to '-1' because of the decrement after outputing
- * the decimal point above (the exponent required is
- * *not* -1!)
- */
- if (exp_b10 >= (-1) && exp_b10 <= 2)
- {
- /* The following only happens if we didn't output the
- * leading zeros above for negative exponent, so this
- * doest add to the digit requirement. Note that the
- * two zeros here can only be output if the two leading
- * zeros were *not* output, so this doesn't increase
- * the output count.
- */
- while (--exp_b10 >= 0) *ascii++ = 48;
-
- *ascii = 0;
-
- /* Total buffer requirement (including the '\0') is
- * 5+precision - see check at the start.
- */
- return;
- }
-
- /* Here if an exponent is required, adjust size for
- * the digits we output but did not count. The total
- * digit output here so far is at most 1+precision - no
- * decimal point and no leading or trailing zeros have
- * been output.
- */
- size -= cdigits;
-
- *ascii++ = 69, --size; /* 'E': PLUS 1 TOTAL 2+precision*/
- if (exp_b10 < 0)
- {
- *ascii++ = 45, --size; /* '-': PLUS 1 TOTAL 3+precision */
- exp_b10 = -exp_b10;
- }
-
- cdigits = 0;
-
- while (exp_b10 > 0)
- {
- exponent[cdigits++] = (char)(48 + exp_b10 % 10);
- exp_b10 /= 10;
- }
-
- /* Need another size check here for the exponent digits, so
- * this need not be considered above.
- */
- if ((int)size > cdigits)
- {
- while (cdigits > 0) *ascii++ = exponent[--cdigits];
-
- *ascii = 0;
-
- return;
- }
- }
- }
- else if (!(fp >= DBL_MIN))
- {
- *ascii++ = 48; /* '0' */
- *ascii = 0;
- return;
- }
- else
- {
- *ascii++ = 105; /* 'i' */
- *ascii++ = 110; /* 'n' */
- *ascii++ = 102; /* 'f' */
- *ascii = 0;
- return;
- }
- }
-
- /* Here on buffer too small. */
- png_error(png_ptr, "ASCII conversion buffer too small");
-}
-
-# endif /* FLOATING_POINT */
-
-# ifdef PNG_FIXED_POINT_SUPPORTED
-/* Function to format a fixed point value in ASCII.
- */
-void /* PRIVATE */
-png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size,
- png_fixed_point fp)
-{
- /* Require space for 10 decimal digits, a decimal point, a minus sign and a
- * trailing \0, 13 characters:
- */
- if (size > 12)
- {
- png_uint_32 num;
-
- /* Avoid overflow here on the minimum integer. */
- if (fp < 0)
- *ascii++ = 45, --size, num = -fp;
- else
- num = fp;
-
- if (num <= 0x80000000U) /* else overflowed */
- {
- unsigned int ndigits = 0, first = 16/*flag value*/;
- char digits[10];
-
- while (num)
- {
- /* Split the low digit off num: */
- unsigned int tmp = num/10;
- num -= tmp*10;
- digits[ndigits++] = (char)(48 + num);
- /* Record the first non-zero digit, note that this is a number
- * starting at 1, it's not actually the array index.
- */
- if (first == 16 && num > 0)
- first = ndigits;
- num = tmp;
- }
-
- if (ndigits > 0)
- {
- while (ndigits > 5) *ascii++ = digits[--ndigits];
- /* The remaining digits are fractional digits, ndigits is '5' or
- * smaller at this point. It is certainly not zero. Check for a
- * non-zero fractional digit:
- */
- if (first <= 5)
- {
- unsigned int i;
- *ascii++ = 46; /* decimal point */
- /* ndigits may be <5 for small numbers, output leading zeros
- * then ndigits digits to first:
- */
- i = 5;
- while (ndigits < i) *ascii++ = 48, --i;
- while (ndigits >= first) *ascii++ = digits[--ndigits];
- /* Don't output the trailing zeros! */
- }
- }
- else
- *ascii++ = 48;
-
- /* And null terminate the string: */
- *ascii = 0;
- return;
- }
- }
-
- /* Here on buffer too small. */
- png_error(png_ptr, "ASCII conversion buffer too small");
-}
-# endif /* FIXED_POINT */
-#endif /* READ_SCAL */
-
-#if defined(PNG_FLOATING_POINT_SUPPORTED) && \
- !defined(PNG_FIXED_POINT_MACRO_SUPPORTED)
-png_fixed_point
-png_fixed(png_structp png_ptr, double fp, png_const_charp text)
-{
- double r = floor(100000 * fp + .5);
-
- if (r > 2147483647. || r < -2147483648.)
- png_fixed_error(png_ptr, text);
-
- return (png_fixed_point)r;
-}
-#endif
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || \
- defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED)
-/* muldiv functions */
-/* This API takes signed arguments and rounds the result to the nearest
- * integer (or, for a fixed point number - the standard argument - to
- * the nearest .00001). Overflow and divide by zero are signalled in
- * the result, a boolean - true on success, false on overflow.
- */
-int
-png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
- png_int_32 divisor)
-{
- /* Return a * times / divisor, rounded. */
- if (divisor != 0)
- {
- if (a == 0 || times == 0)
- {
- *res = 0;
- return 1;
- }
- else
- {
-#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- double r = a;
- r *= times;
- r /= divisor;
- r = floor(r+.5);
-
- /* A png_fixed_point is a 32 bit integer. */
- if (r <= 2147483647. && r >= -2147483648.)
- {
- *res = (png_fixed_point)r;
- return 1;
- }
-#else
- int negative = 0;
- png_uint_32 A, T, D;
- png_uint_32 s16, s32, s00;
-
- if (a < 0)
- negative = 1, A = -a;
- else
- A = a;
-
- if (times < 0)
- negative = !negative, T = -times;
- else
- T = times;
-
- if (divisor < 0)
- negative = !negative, D = -divisor;
- else
- D = divisor;
-
- /* Following can't overflow because the arguments only
- * have 31 bits each, however the result may be 32 bits.
- */
- s16 = (A >> 16) * (T & 0xffff) +
- (A & 0xffff) * (T >> 16);
- /* Can't overflow because the a*times bit is only 30
- * bits at most.
- */
- s32 = (A >> 16) * (T >> 16) + (s16 >> 16);
- s00 = (A & 0xffff) * (T & 0xffff);
-
- s16 = (s16 & 0xffff) << 16;
- s00 += s16;
-
- if (s00 < s16)
- ++s32; /* carry */
-
- if (s32 < D) /* else overflow */
- {
- /* s32.s00 is now the 64 bit product, do a standard
- * division, we know that s32 < D, so the maximum
- * required shift is 31.
- */
- int bitshift = 32;
- png_fixed_point result = 0; /* NOTE: signed */
-
- while (--bitshift >= 0)
- {
- png_uint_32 d32, d00;
-
- if (bitshift > 0)
- d32 = D >> (32-bitshift), d00 = D << bitshift;
-
- else
- d32 = 0, d00 = D;
-
- if (s32 > d32)
- {
- if (s00 < d00) --s32; /* carry */
- s32 -= d32, s00 -= d00, result += 1<<bitshift;
- }
-
- else
- if (s32 == d32 && s00 >= d00)
- s32 = 0, s00 -= d00, result += 1<<bitshift;
- }
-
- /* Handle the rounding. */
- if (s00 >= (D >> 1))
- ++result;
-
- if (negative)
- result = -result;
-
- /* Check for overflow. */
- if ((negative && result <= 0) || (!negative && result >= 0))
- {
- *res = result;
- return 1;
- }
- }
-#endif
- }
- }
-
- return 0;
-}
-#endif /* READ_GAMMA || INCH_CONVERSIONS */
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
-/* The following is for when the caller doesn't much care about the
- * result.
- */
-png_fixed_point
-png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times,
- png_int_32 divisor)
-{
- png_fixed_point result;
-
- if (png_muldiv(&result, a, times, divisor))
- return result;
-
- png_warning(png_ptr, "fixed point overflow ignored");
- return 0;
-}
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gammma */
-/* Calculate a reciprocal, return 0 on div-by-zero or overflow. */
-png_fixed_point
-png_reciprocal(png_fixed_point a)
-{
-#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- double r = floor(1E10/a+.5);
-
- if (r <= 2147483647. && r >= -2147483648.)
- return (png_fixed_point)r;
-#else
- png_fixed_point res;
-
- if (png_muldiv(&res, 100000, 100000, a))
- return res;
-#endif
-
- return 0; /* error/overflow */
-}
-
-/* A local convenience routine. */
-static png_fixed_point
-png_product2(png_fixed_point a, png_fixed_point b)
-{
- /* The required result is 1/a * 1/b; the following preserves accuracy. */
-#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- double r = a * 1E-5;
- r *= b;
- r = floor(r+.5);
-
- if (r <= 2147483647. && r >= -2147483648.)
- return (png_fixed_point)r;
-#else
- png_fixed_point res;
-
- if (png_muldiv(&res, a, b, 100000))
- return res;
-#endif
-
- return 0; /* overflow */
-}
-
-/* The inverse of the above. */
-png_fixed_point
-png_reciprocal2(png_fixed_point a, png_fixed_point b)
-{
- /* The required result is 1/a * 1/b; the following preserves accuracy. */
-#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- double r = 1E15/a;
- r /= b;
- r = floor(r+.5);
-
- if (r <= 2147483647. && r >= -2147483648.)
- return (png_fixed_point)r;
-#else
- /* This may overflow because the range of png_fixed_point isn't symmetric,
- * but this API is only used for the product of file and screen gamma so it
- * doesn't matter that the smallest number it can produce is 1/21474, not
- * 1/100000
- */
- png_fixed_point res = png_product2(a, b);
-
- if (res != 0)
- return png_reciprocal(res);
-#endif
-
- return 0; /* overflow */
-}
-#endif /* READ_GAMMA */
-
-#ifdef PNG_CHECK_cHRM_SUPPORTED
-/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2,
- * 2010: moved from pngset.c) */
-/*
- * Multiply two 32-bit numbers, V1 and V2, using 32-bit
- * arithmetic, to produce a 64 bit result in the HI/LO words.
- *
- * A B
- * x C D
- * ------
- * AD || BD
- * AC || CB || 0
- *
- * where A and B are the high and low 16-bit words of V1,
- * C and D are the 16-bit words of V2, AD is the product of
- * A and D, and X || Y is (X << 16) + Y.
-*/
-
-void /* PRIVATE */
-png_64bit_product (long v1, long v2, unsigned long *hi_product,
- unsigned long *lo_product)
-{
- int a, b, c, d;
- long lo, hi, x, y;
-
- a = (v1 >> 16) & 0xffff;
- b = v1 & 0xffff;
- c = (v2 >> 16) & 0xffff;
- d = v2 & 0xffff;
-
- lo = b * d; /* BD */
- x = a * d + c * b; /* AD + CB */
- y = ((lo >> 16) & 0xffff) + x;
-
- lo = (lo & 0xffff) | ((y & 0xffff) << 16);
- hi = (y >> 16) & 0xffff;
-
- hi += a * c; /* AC */
-
- *hi_product = (unsigned long)hi;
- *lo_product = (unsigned long)lo;
-}
-#endif /* CHECK_cHRM */
-
-#ifdef PNG_READ_GAMMA_SUPPORTED /* gamma table code */
-#ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED
-/* Fixed point gamma.
- *
- * To calculate gamma this code implements fast log() and exp() calls using only
- * fixed point arithmetic. This code has sufficient precision for either 8 or
- * 16 bit sample values.
- *
- * The tables used here were calculated using simple 'bc' programs, but C double
- * precision floating point arithmetic would work fine. The programs are given
- * at the head of each table.
- *
- * 8 bit log table
- * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to
- * 255, so it's the base 2 logarithm of a normalized 8 bit floating point
- * mantissa. The numbers are 32 bit fractions.
- */
-static png_uint_32
-png_8bit_l2[128] =
-{
-# if PNG_DO_BC
- for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; }
-# endif
- 4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U,
- 3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U,
- 3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U,
- 3455425220U, 3413129301U, 3371120137U, 3329393864U, 3287946700U, 3246774933U,
- 3205874930U, 3165243125U, 3124876025U, 3084770202U, 3044922296U, 3005329011U,
- 2965987113U, 2926893432U, 2888044853U, 2849438323U, 2811070844U, 2772939474U,
- 2735041326U, 2697373562U, 2659933400U, 2622718104U, 2585724991U, 2548951424U,
- 2512394810U, 2476052606U, 2439922311U, 2404001468U, 2368287663U, 2332778523U,
- 2297471715U, 2262364947U, 2227455964U, 2192742551U, 2158222529U, 2123893754U,
- 2089754119U, 2055801552U, 2022034013U, 1988449497U, 1955046031U, 1921821672U,
- 1888774511U, 1855902668U, 1823204291U, 1790677560U, 1758320682U, 1726131893U,
- 1694109454U, 1662251657U, 1630556815U, 1599023271U, 1567649391U, 1536433567U,
- 1505374214U, 1474469770U, 1443718700U, 1413119487U, 1382670639U, 1352370686U,
- 1322218179U, 1292211689U, 1262349810U, 1232631153U, 1203054352U, 1173618059U,
- 1144320946U, 1115161701U, 1086139034U, 1057251672U, 1028498358U, 999877854U,
- 971388940U, 943030410U, 914801076U, 886699767U, 858725327U, 830876614U,
- 803152505U, 775551890U, 748073672U, 720716771U, 693480120U, 666362667U,
- 639363374U, 612481215U, 585715177U, 559064263U, 532527486U, 506103872U,
- 479792461U, 453592303U, 427502463U, 401522014U, 375650043U, 349885648U,
- 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U,
- 172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U,
- 24347096U, 0U
-#if 0
- /* The following are the values for 16 bit tables - these work fine for the 8
- * bit conversions but produce very slightly larger errors in the 16 bit log
- * (about 1.2 as opposed to 0.7 absolute error in the final value). To use
- * these all the shifts below must be adjusted appropriately.
- */
- 65166, 64430, 63700, 62976, 62257, 61543, 60835, 60132, 59434, 58741, 58054,
- 57371, 56693, 56020, 55352, 54689, 54030, 53375, 52726, 52080, 51439, 50803,
- 50170, 49542, 48918, 48298, 47682, 47070, 46462, 45858, 45257, 44661, 44068,
- 43479, 42894, 42312, 41733, 41159, 40587, 40020, 39455, 38894, 38336, 37782,
- 37230, 36682, 36137, 35595, 35057, 34521, 33988, 33459, 32932, 32408, 31887,
- 31369, 30854, 30341, 29832, 29325, 28820, 28319, 27820, 27324, 26830, 26339,
- 25850, 25364, 24880, 24399, 23920, 23444, 22970, 22499, 22029, 21562, 21098,
- 20636, 20175, 19718, 19262, 18808, 18357, 17908, 17461, 17016, 16573, 16132,
- 15694, 15257, 14822, 14390, 13959, 13530, 13103, 12678, 12255, 11834, 11415,
- 10997, 10582, 10168, 9756, 9346, 8937, 8531, 8126, 7723, 7321, 6921, 6523,
- 6127, 5732, 5339, 4947, 4557, 4169, 3782, 3397, 3014, 2632, 2251, 1872, 1495,
- 1119, 744, 372
-#endif
-};
-
-static png_int_32
-png_log8bit(unsigned int x)
-{
- unsigned int lg2 = 0;
- /* Each time 'x' is multiplied by 2, 1 must be subtracted off the final log,
- * because the log is actually negate that means adding 1. The final
- * returned value thus has the range 0 (for 255 input) to 7.994 (for 1
- * input), return 7.99998 for the overflow (log 0) case - so the result is
- * always at most 19 bits.
- */
- if ((x &= 0xff) == 0)
- return 0xffffffff;
-
- if ((x & 0xf0) == 0)
- lg2 = 4, x <<= 4;
-
- if ((x & 0xc0) == 0)
- lg2 += 2, x <<= 2;
-
- if ((x & 0x80) == 0)
- lg2 += 1, x <<= 1;
-
- /* result is at most 19 bits, so this cast is safe: */
- return (png_int_32)((lg2 << 16) + ((png_8bit_l2[x-128]+32768)>>16));
-}
-
-/* The above gives exact (to 16 binary places) log2 values for 8 bit images,
- * for 16 bit images we use the most significant 8 bits of the 16 bit value to
- * get an approximation then multiply the approximation by a correction factor
- * determined by the remaining up to 8 bits. This requires an additional step
- * in the 16 bit case.
- *
- * We want log2(value/65535), we have log2(v'/255), where:
- *
- * value = v' * 256 + v''
- * = v' * f
- *
- * So f is value/v', which is equal to (256+v''/v') since v' is in the range 128
- * to 255 and v'' is in the range 0 to 255 f will be in the range 256 to less
- * than 258. The final factor also needs to correct for the fact that our 8 bit
- * value is scaled by 255, whereas the 16 bit values must be scaled by 65535.
- *
- * This gives a final formula using a calculated value 'x' which is value/v' and
- * scaling by 65536 to match the above table:
- *
- * log2(x/257) * 65536
- *
- * Since these numbers are so close to '1' we can use simple linear
- * interpolation between the two end values 256/257 (result -368.61) and 258/257
- * (result 367.179). The values used below are scaled by a further 64 to give
- * 16 bit precision in the interpolation:
- *
- * Start (256): -23591
- * Zero (257): 0
- * End (258): 23499
- */
-static png_int_32
-png_log16bit(png_uint_32 x)
-{
- unsigned int lg2 = 0;
-
- /* As above, but now the input has 16 bits. */
- if ((x &= 0xffff) == 0)
- return 0xffffffff;
-
- if ((x & 0xff00) == 0)
- lg2 = 8, x <<= 8;
-
- if ((x & 0xf000) == 0)
- lg2 += 4, x <<= 4;
-
- if ((x & 0xc000) == 0)
- lg2 += 2, x <<= 2;
-
- if ((x & 0x8000) == 0)
- lg2 += 1, x <<= 1;
-
- /* Calculate the base logarithm from the top 8 bits as a 28 bit fractional
- * value.
- */
- lg2 <<= 28;
- lg2 += (png_8bit_l2[(x>>8)-128]+8) >> 4;
-
- /* Now we need to interpolate the factor, this requires a division by the top
- * 8 bits. Do this with maximum precision.
- */
- x = ((x << 16) + (x >> 9)) / (x >> 8);
-
- /* Since we divided by the top 8 bits of 'x' there will be a '1' at 1<<24,
- * the value at 1<<16 (ignoring this) will be 0 or 1; this gives us exactly
- * 16 bits to interpolate to get the low bits of the result. Round the
- * answer. Note that the end point values are scaled by 64 to retain overall
- * precision and that 'lg2' is current scaled by an extra 12 bits, so adjust
- * the overall scaling by 6-12. Round at every step.
- */
- x -= 1U << 24;
-
- if (x <= 65536U) /* <= '257' */
- lg2 += ((23591U * (65536U-x)) + (1U << (16+6-12-1))) >> (16+6-12);
-
- else
- lg2 -= ((23499U * (x-65536U)) + (1U << (16+6-12-1))) >> (16+6-12);
-
- /* Safe, because the result can't have more than 20 bits: */
- return (png_int_32)((lg2 + 2048) >> 12);
-}
-
-/* The 'exp()' case must invert the above, taking a 20 bit fixed point
- * logarithmic value and returning a 16 or 8 bit number as appropriate. In
- * each case only the low 16 bits are relevant - the fraction - since the
- * integer bits (the top 4) simply determine a shift.
- *
- * The worst case is the 16 bit distinction between 65535 and 65534, this
- * requires perhaps spurious accuracty in the decoding of the logarithm to
- * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance
- * of getting this accuracy in practice.
- *
- * To deal with this the following exp() function works out the exponent of the
- * frational part of the logarithm by using an accurate 32 bit value from the
- * top four fractional bits then multiplying in the remaining bits.
- */
-static png_uint_32
-png_32bit_exp[16] =
-{
-# if PNG_DO_BC
- for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; }
-# endif
- /* NOTE: the first entry is deliberately set to the maximum 32 bit value. */
- 4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U,
- 3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U,
- 2553802834U, 2445529972U, 2341847524U, 2242560872U
-};
-
-/* Adjustment table; provided to explain the numbers in the code below. */
-#if PNG_DO_BC
-for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"}
- 11 44937.64284865548751208448
- 10 45180.98734845585101160448
- 9 45303.31936980687359311872
- 8 45364.65110595323018870784
- 7 45395.35850361789624614912
- 6 45410.72259715102037508096
- 5 45418.40724413220722311168
- 4 45422.25021786898173001728
- 3 45424.17186732298419044352
- 2 45425.13273269940811464704
- 1 45425.61317555035558641664
- 0 45425.85339951654943850496
-#endif
-
-static png_uint_32
-png_exp(png_fixed_point x)
-{
- if (x > 0 && x <= 0xfffff) /* Else overflow or zero (underflow) */
- {
- /* Obtain a 4 bit approximation */
- png_uint_32 e = png_32bit_exp[(x >> 12) & 0xf];
-
- /* Incorporate the low 12 bits - these decrease the returned value by
- * multiplying by a number less than 1 if the bit is set. The multiplier
- * is determined by the above table and the shift. Notice that the values
- * converge on 45426 and this is used to allow linear interpolation of the
- * low bits.
- */
- if (x & 0x800)
- e -= (((e >> 16) * 44938U) + 16U) >> 5;
-
- if (x & 0x400)
- e -= (((e >> 16) * 45181U) + 32U) >> 6;
-
- if (x & 0x200)
- e -= (((e >> 16) * 45303U) + 64U) >> 7;
-
- if (x & 0x100)
- e -= (((e >> 16) * 45365U) + 128U) >> 8;
-
- if (x & 0x080)
- e -= (((e >> 16) * 45395U) + 256U) >> 9;
-
- if (x & 0x040)
- e -= (((e >> 16) * 45410U) + 512U) >> 10;
-
- /* And handle the low 6 bits in a single block. */
- e -= (((e >> 16) * 355U * (x & 0x3fU)) + 256U) >> 9;
-
- /* Handle the upper bits of x. */
- e >>= x >> 16;
- return e;
- }
-
- /* Check for overflow */
- if (x <= 0)
- return png_32bit_exp[0];
-
- /* Else underflow */
- return 0;
-}
-
-static png_byte
-png_exp8bit(png_fixed_point lg2)
-{
- /* Get a 32 bit value: */
- png_uint_32 x = png_exp(lg2);
-
- /* Convert the 32 bit value to 0..255 by multiplying by 256-1, note that the
- * second, rounding, step can't overflow because of the first, subtraction,
- * step.
- */
- x -= x >> 8;
- return (png_byte)((x + 0x7fffffU) >> 24);
-}
-
-static png_uint_16
-png_exp16bit(png_fixed_point lg2)
-{
- /* Get a 32 bit value: */
- png_uint_32 x = png_exp(lg2);
-
- /* Convert the 32 bit value to 0..65535 by multiplying by 65536-1: */
- x -= x >> 16;
- return (png_uint_16)((x + 32767U) >> 16);
-}
-#endif /* FLOATING_ARITHMETIC */
-
-png_byte
-png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val)
-{
- if (value > 0 && value < 255)
- {
-# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- double r = floor(255*pow(value/255.,gamma_val*.00001)+.5);
- return (png_byte)r;
-# else
- png_int_32 lg2 = png_log8bit(value);
- png_fixed_point res;
-
- if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1))
- return png_exp8bit(res);
-
- /* Overflow. */
- value = 0;
-# endif
- }
-
- return (png_byte)value;
-}
-
-png_uint_16
-png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val)
-{
- if (value > 0 && value < 65535)
- {
-# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- double r = floor(65535*pow(value/65535.,gamma_val*.00001)+.5);
- return (png_uint_16)r;
-# else
- png_int_32 lg2 = png_log16bit(value);
- png_fixed_point res;
-
- if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1))
- return png_exp16bit(res);
-
- /* Overflow. */
- value = 0;
-# endif
- }
-
- return (png_uint_16)value;
-}
-
-/* This does the right thing based on the bit_depth field of the
- * png_struct, interpreting values as 8 or 16 bit. While the result
- * is nominally a 16 bit value if bit depth is 8 then the result is
- * 8 bit (as are the arguments.)
- */
-png_uint_16 /* PRIVATE */
-png_gamma_correct(png_structp png_ptr, unsigned int value,
- png_fixed_point gamma_val)
-{
- if (png_ptr->bit_depth == 8)
- return png_gamma_8bit_correct(value, gamma_val);
-
- else
- return png_gamma_16bit_correct(value, gamma_val);
-}
-
-/* This is the shared test on whether a gamma value is 'significant' - whether
- * it is worth doing gamma correction.
- */
-int /* PRIVATE */
-png_gamma_significant(png_fixed_point gamma_val)
-{
- return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED ||
- gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED;
-}
-
-/* Internal function to build a single 16 bit table - the table consists of
- * 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount
- * to shift the input values right (or 16-number_of_signifiant_bits).
- *
- * The caller is responsible for ensuring that the table gets cleaned up on
- * png_error (i.e. if one of the mallocs below fails) - i.e. the *table argument
- * should be somewhere that will be cleaned.
- */
-static void
-png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
- PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val)
-{
- /* Various values derived from 'shift': */
- PNG_CONST unsigned int num = 1U << (8U - shift);
- PNG_CONST unsigned int max = (1U << (16U - shift))-1U;
- PNG_CONST unsigned int max_by_2 = 1U << (15U-shift);
- unsigned int i;
-
- png_uint_16pp table = *ptable =
- (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p));
-
- for (i = 0; i < num; i++)
- {
- png_uint_16p sub_table = table[i] =
- (png_uint_16p)png_malloc(png_ptr, 256 * png_sizeof(png_uint_16));
-
- /* The 'threshold' test is repeated here because it can arise for one of
- * the 16 bit tables even if the others don't hit it.
- */
- if (png_gamma_significant(gamma_val))
- {
- /* The old code would overflow at the end and this would cause the
- * 'pow' function to return a result >1, resulting in an
- * arithmetic error. This code follows the spec exactly; ig is
- * the recovered input sample, it always has 8-16 bits.
- *
- * We want input * 65535/max, rounded, the arithmetic fits in 32
- * bits (unsigned) so long as max <= 32767.
- */
- unsigned int j;
- for (j = 0; j < 256; j++)
- {
- png_uint_32 ig = (j << (8-shift)) + i;
-# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- /* Inline the 'max' scaling operation: */
- double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5);
- sub_table[j] = (png_uint_16)d;
-# else
- if (shift)
- ig = (ig * 65535U + max_by_2)/max;
-
- sub_table[j] = png_gamma_16bit_correct(ig, gamma_val);
-# endif
- }
- }
- else
- {
- /* We must still build a table, but do it the fast way. */
- unsigned int j;
-
- for (j = 0; j < 256; j++)
- {
- png_uint_32 ig = (j << (8-shift)) + i;
-
- if (shift)
- ig = (ig * 65535U + max_by_2)/max;
-
- sub_table[j] = (png_uint_16)ig;
- }
- }
- }
-}
-
-/* NOTE: this function expects the *inverse* of the overall gamma transformation
- * required.
- */
-static void
-png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable,
- PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val)
-{
- PNG_CONST unsigned int num = 1U << (8U - shift);
- PNG_CONST unsigned int max = (1U << (16U - shift))-1U;
- unsigned int i;
- png_uint_32 last;
-
- png_uint_16pp table = *ptable =
- (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p));
-
- /* 'num' is the number of tables and also the number of low bits of low
- * bits of the input 16 bit value used to select a table. Each table is
- * itself index by the high 8 bits of the value.
- */
- for (i = 0; i < num; i++)
- table[i] = (png_uint_16p)png_malloc(png_ptr,
- 256 * png_sizeof(png_uint_16));
-
- /* 'gamma_val' is set to the reciprocal of the value calculated above, so
- * pow(out,g) is an *input* value. 'last' is the last input value set.
- *
- * In the loop 'i' is used to find output values. Since the output is 8
- * bit there are only 256 possible values. The tables are set up to
- * select the closest possible output value for each input by finding
- * the input value at the boundary between each pair of output values
- * and filling the table up to that boundary with the lower output
- * value.
- *
- * The boundary values are 0.5,1.5..253.5,254.5. Since these are 9 bit
- * values the code below uses a 16 bit value in i; the values start at
- * 128.5 (for 0.5) and step by 257, for a total of 254 values (the last
- * entries are filled with 255). Start i at 128 and fill all 'last'
- * table entries <= 'max'
- */
- last = 0;
- for (i = 0; i < 255; ++i) /* 8 bit output value */
- {
- /* Find the corresponding maximum input value */
- png_uint_16 out = (png_uint_16)(i * 257U); /* 16 bit output value */
-
- /* Find the boundary value in 16 bits: */
- png_uint_32 bound = png_gamma_16bit_correct(out+128U, gamma_val);
-
- /* Adjust (round) to (16-shift) bits: */
- bound = (bound * max + 32768U)/65535U + 1U;
-
- while (last < bound)
- {
- table[last & (0xffU >> shift)][last >> (8U - shift)] = out;
- last++;
- }
- }
-
- /* And fill in the final entries. */
- while (last < (num << 8))
- {
- table[last & (0xff >> shift)][last >> (8U - shift)] = 65535U;
- last++;
- }
-}
-
-/* Build a single 8 bit table: same as the 16 bit case but much simpler (and
- * typically much faster). Note that libpng currently does no sBIT processing
- * (apparently contrary to the spec) so a 256 entry table is always generated.
- */
-static void
-png_build_8bit_table(png_structp png_ptr, png_bytepp ptable,
- PNG_CONST png_fixed_point gamma_val)
-{
- unsigned int i;
- png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256);
-
- if (png_gamma_significant(gamma_val)) for (i=0; i<256; i++)
- table[i] = png_gamma_8bit_correct(i, gamma_val);
-
- else for (i=0; i<256; ++i)
- table[i] = (png_byte)i;
-}
-
-/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit
- * tables, we don't make a full table if we are reducing to 8-bit in
- * the future. Note also how the gamma_16 tables are segmented so that
- * we don't need to allocate > 64K chunks for a full 16-bit table.
- */
-void /* PRIVATE */
-png_build_gamma_table(png_structp png_ptr, int bit_depth)
-{
- png_debug(1, "in png_build_gamma_table");
-
- if (bit_depth <= 8)
- {
- png_build_8bit_table(png_ptr, &png_ptr->gamma_table,
- png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma,
- png_ptr->screen_gamma) : PNG_FP_1);
-
-#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
- defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
- if (png_ptr->transformations & ((PNG_BACKGROUND) | PNG_RGB_TO_GRAY))
- {
- png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1,
- png_reciprocal(png_ptr->gamma));
-
- png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1,
- png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) :
- png_ptr->gamma/* Probably doing rgb_to_gray */);
- }
-#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
- }
- else
- {
- png_byte shift, sig_bit;
-
- if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
- {
- sig_bit = png_ptr->sig_bit.red;
-
- if (png_ptr->sig_bit.green > sig_bit)
- sig_bit = png_ptr->sig_bit.green;
-
- if (png_ptr->sig_bit.blue > sig_bit)
- sig_bit = png_ptr->sig_bit.blue;
- }
- else
- sig_bit = png_ptr->sig_bit.gray;
-
- /* 16 bit gamma code uses this equation:
- *
- * ov = table[(iv & 0xff) >> gamma_shift][iv >> 8]
- *
- * Where 'iv' is the input color value and 'ov' is the output value -
- * pow(iv, gamma).
- *
- * Thus the gamma table consists of up to 256 256 entry tables. The table
- * is selected by the (8-gamma_shift) most significant of the low 8 bits of
- * the color value then indexed by the upper 8 bits:
- *
- * table[low bits][high 8 bits]
- *
- * So the table 'n' corresponds to all those 'iv' of:
- *
- * <all high 8 bit values><n << gamma_shift>..<(n+1 << gamma_shift)-1>
- *
- */
- if (sig_bit > 0 && sig_bit < 16U)
- shift = (png_byte)(16U - sig_bit); /* shift == insignificant bits */
-
- else
- shift = 0; /* keep all 16 bits */
-
- if (png_ptr->transformations & PNG_16_TO_8)
- {
- /* PNG_MAX_GAMMA_8 is the number of bits to keep - effectively
- * the significant bits in the *input* when the output will
- * eventually be 8 bits. By default it is 11.
- */
- if (shift < (16U - PNG_MAX_GAMMA_8))
- shift = (16U - PNG_MAX_GAMMA_8);
- }
-
- if (shift > 8U)
- shift = 8U; /* Guarantees at least one table! */
-
- png_ptr->gamma_shift = shift;
-
-#ifdef PNG_16BIT_SUPPORTED
- if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND))
-#endif
- png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift,
- png_ptr->screen_gamma > 0 ? png_product2(png_ptr->gamma,
- png_ptr->screen_gamma) : PNG_FP_1);
-
-#ifdef PNG_16BIT_SUPPORTED
- else
- png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift,
- png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma,
- png_ptr->screen_gamma) : PNG_FP_1);
-#endif
-
-#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
- defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
- if (png_ptr->transformations & (PNG_BACKGROUND | PNG_RGB_TO_GRAY))
- {
- png_build_16bit_table(png_ptr, &png_ptr->gamma_16_to_1, shift,
- png_reciprocal(png_ptr->gamma));
-
- /* Notice that the '16 from 1' table should be full precision, however
- * the lookup on this table still uses gamma_shift, so it can't be.
- * TODO: fix this.
- */
- png_build_16bit_table(png_ptr, &png_ptr->gamma_16_from_1, shift,
- png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) :
- png_ptr->gamma/* Probably doing rgb_to_gray */);
- }
-#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
- }
-}
-#endif /* READ_GAMMA */
-#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+++ /dev/null
-
-/* png.h - header file for PNG reference library
- *
- * libpng version 1.5.2 - March 31, 2011
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license (See LICENSE, below)
- *
- * Authors and maintainers:
- * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
- * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- * libpng versions 0.97, January 1998, through 1.5.2 - March 31, 2011: Glenn
- * See also "Contributing Authors", below.
- *
- * Note about libpng version numbers:
- *
- * Due to various miscommunications, unforeseen code incompatibilities
- * and occasional factors outside the authors' control, version numbering
- * on the library has not always been consistent and straightforward.
- * The following table summarizes matters since version 0.89c, which was
- * the first widely used release:
- *
- * source png.h png.h shared-lib
- * version string int version
- * ------- ------ ----- ----------
- * 0.89c "1.0 beta 3" 0.89 89 1.0.89
- * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90]
- * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95]
- * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96]
- * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97]
- * 0.97c 0.97 97 2.0.97
- * 0.98 0.98 98 2.0.98
- * 0.99 0.99 98 2.0.99
- * 0.99a-m 0.99 99 2.0.99
- * 1.00 1.00 100 2.1.0 [100 should be 10000]
- * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000]
- * 1.0.1 png.h string is 10001 2.1.0
- * 1.0.1a-e identical to the 10002 from here on, the shared library
- * 1.0.2 source version) 10002 is 2.V where V is the source code
- * 1.0.2a-b 10003 version, except as noted.
- * 1.0.3 10003
- * 1.0.3a-d 10004
- * 1.0.4 10004
- * 1.0.4a-f 10005
- * 1.0.5 (+ 2 patches) 10005
- * 1.0.5a-d 10006
- * 1.0.5e-r 10100 (not source compatible)
- * 1.0.5s-v 10006 (not binary compatible)
- * 1.0.6 (+ 3 patches) 10006 (still binary incompatible)
- * 1.0.6d-f 10007 (still binary incompatible)
- * 1.0.6g 10007
- * 1.0.6h 10007 10.6h (testing xy.z so-numbering)
- * 1.0.6i 10007 10.6i
- * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0)
- * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible)
- * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible)
- * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible)
- * 1.0.7 1 10007 (still compatible)
- * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4
- * 1.0.8rc1 1 10008 2.1.0.8rc1
- * 1.0.8 1 10008 2.1.0.8
- * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6
- * 1.0.9rc1 1 10009 2.1.0.9rc1
- * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10
- * 1.0.9rc2 1 10009 2.1.0.9rc2
- * 1.0.9 1 10009 2.1.0.9
- * 1.0.10beta1 1 10010 2.1.0.10beta1
- * 1.0.10rc1 1 10010 2.1.0.10rc1
- * 1.0.10 1 10010 2.1.0.10
- * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3
- * 1.0.11rc1 1 10011 2.1.0.11rc1
- * 1.0.11 1 10011 2.1.0.11
- * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2
- * 1.0.12rc1 2 10012 2.1.0.12rc1
- * 1.0.12 2 10012 2.1.0.12
- * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned)
- * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2
- * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5
- * 1.2.0rc1 3 10200 3.1.2.0rc1
- * 1.2.0 3 10200 3.1.2.0
- * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4
- * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2
- * 1.2.1 3 10201 3.1.2.1
- * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6
- * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1
- * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1
- * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1
- * 1.0.13 10 10013 10.so.0.1.0.13
- * 1.2.2 12 10202 12.so.0.1.2.2
- * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6
- * 1.2.3 12 10203 12.so.0.1.2.3
- * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3
- * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1
- * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1
- * 1.0.14 10 10014 10.so.0.1.0.14
- * 1.2.4 13 10204 12.so.0.1.2.4
- * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2
- * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3
- * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3
- * 1.0.15 10 10015 10.so.0.1.0.15
- * 1.2.5 13 10205 12.so.0.1.2.5
- * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4
- * 1.0.16 10 10016 10.so.0.1.0.16
- * 1.2.6 13 10206 12.so.0.1.2.6
- * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2
- * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1
- * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1
- * 1.0.17 10 10017 12.so.0.1.0.17
- * 1.2.7 13 10207 12.so.0.1.2.7
- * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5
- * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5
- * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5
- * 1.0.18 10 10018 12.so.0.1.0.18
- * 1.2.8 13 10208 12.so.0.1.2.8
- * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3
- * 1.2.9beta4-11 13 10209 12.so.0.9[.0]
- * 1.2.9rc1 13 10209 12.so.0.9[.0]
- * 1.2.9 13 10209 12.so.0.9[.0]
- * 1.2.10beta1-7 13 10210 12.so.0.10[.0]
- * 1.2.10rc1-2 13 10210 12.so.0.10[.0]
- * 1.2.10 13 10210 12.so.0.10[.0]
- * 1.4.0beta1-5 14 10400 14.so.0.0[.0]
- * 1.2.11beta1-4 13 10211 12.so.0.11[.0]
- * 1.4.0beta7-8 14 10400 14.so.0.0[.0]
- * 1.2.11 13 10211 12.so.0.11[.0]
- * 1.2.12 13 10212 12.so.0.12[.0]
- * 1.4.0beta9-14 14 10400 14.so.0.0[.0]
- * 1.2.13 13 10213 12.so.0.13[.0]
- * 1.4.0beta15-36 14 10400 14.so.0.0[.0]
- * 1.4.0beta37-87 14 10400 14.so.14.0[.0]
- * 1.4.0rc01 14 10400 14.so.14.0[.0]
- * 1.4.0beta88-109 14 10400 14.so.14.0[.0]
- * 1.4.0rc02-08 14 10400 14.so.14.0[.0]
- * 1.4.0 14 10400 14.so.14.0[.0]
- * 1.4.1beta01-03 14 10401 14.so.14.1[.0]
- * 1.4.1rc01 14 10401 14.so.14.1[.0]
- * 1.4.1beta04-12 14 10401 14.so.14.1[.0]
- * 1.4.1 14 10401 14.so.14.1[.0]
- * 1.4.2 14 10402 14.so.14.2[.0]
- * 1.4.3 14 10403 14.so.14.3[.0]
- * 1.4.4 14 10404 14.so.14.4[.0]
- * 1.5.0beta01-58 15 10500 15.so.15.0[.0]
- * 1.5.0rc01-07 15 10500 15.so.15.0[.0]
- * 1.5.0 15 10500 15.so.15.0[.0]
- * 1.5.1beta01-11 15 10501 15.so.15.1[.0]
- * 1.5.1rc01-02 15 10501 15.so.15.1[.0]
- * 1.5.1 15 10501 15.so.15.1[.0]
- * 1.5.2beta01-03 15 10502 15.so.15.2[.0]
- * 1.5.2rc01-03 15 10502 15.so.15.2[.0]
- * 1.5.2 15 10502 15.so.15.2[.0]
- *
- * Henceforth the source version will match the shared-library major
- * and minor numbers; the shared-library major version number will be
- * used for changes in backward compatibility, as it is intended. The
- * PNG_LIBPNG_VER macro, which is not used within libpng but is available
- * for applications, is an unsigned integer of the form xyyzz corresponding
- * to the source version x.y.z (leading zeros in y and z). Beta versions
- * were given the previous public release number plus a letter, until
- * version 1.0.6j; from then on they were given the upcoming public
- * release number plus "betaNN" or "rcN".
- *
- * Binary incompatibility exists only when applications make direct access
- * to the info_ptr or png_ptr members through png.h, and the compiled
- * application is loaded with a different version of the library.
- *
- * DLLNUM will change each time there are forward or backward changes
- * in binary compatibility (e.g., when a new feature is added).
- *
- * See libpng-manual.txt or libpng.3 for more information. The PNG
- * specification is available as a W3C Recommendation and as an ISO
- * Specification, <http://www.w3.org/TR/2003/REC-PNG-20031110/
- */
-
-/*
- * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
- *
- * If you modify libpng you may insert additional notices immediately following
- * this sentence.
- *
- * This code is released under the libpng license.
- *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.2, March 31, 2011, are
- * Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-1.2.5
- * with the following individual added to the list of Contributing Authors:
- *
- * Cosmin Truta
- *
- * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are
- * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-1.0.6
- * with the following individuals added to the list of Contributing Authors:
- *
- * Simon-Pierre Cadieux
- * Eric S. Raymond
- * Gilles Vollant
- *
- * and with the following additions to the disclaimer:
- *
- * There is no warranty against interference with your enjoyment of the
- * library or against infringement. There is no warranty that our
- * efforts or the library will fulfill any of your particular purposes
- * or needs. This library is provided with all faults, and the entire
- * risk of satisfactory quality, performance, accuracy, and effort is with
- * the user.
- *
- * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-0.96,
- * with the following individuals added to the list of Contributing Authors:
- *
- * Tom Lane
- * Glenn Randers-Pehrson
- * Willem van Schaik
- *
- * libpng versions 0.89, June 1996, through 0.96, May 1997, are
- * Copyright (c) 1996, 1997 Andreas Dilger
- * Distributed according to the same disclaimer and license as libpng-0.88,
- * with the following individuals added to the list of Contributing Authors:
- *
- * John Bowler
- * Kevin Bracey
- * Sam Bushell
- * Magnus Holmgren
- * Greg Roelofs
- * Tom Tanner
- *
- * libpng versions 0.5, May 1995, through 0.88, January 1996, are
- * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
- *
- * For the purposes of this copyright and license, "Contributing Authors"
- * is defined as the following set of individuals:
- *
- * Andreas Dilger
- * Dave Martindale
- * Guy Eric Schalnat
- * Paul Schmidt
- * Tim Wegner
- *
- * The PNG Reference Library is supplied "AS IS". The Contributing Authors
- * and Group 42, Inc. disclaim all warranties, expressed or implied,
- * including, without limitation, the warranties of merchantability and of
- * fitness for any purpose. The Contributing Authors and Group 42, Inc.
- * assume no liability for direct, indirect, incidental, special, exemplary,
- * or consequential damages, which may result from the use of the PNG
- * Reference Library, even if advised of the possibility of such damage.
- *
- * Permission is hereby granted to use, copy, modify, and distribute this
- * source code, or portions hereof, for any purpose, without fee, subject
- * to the following restrictions:
- *
- * 1. The origin of this source code must not be misrepresented.
- *
- * 2. Altered versions must be plainly marked as such and must not
- * be misrepresented as being the original source.
- *
- * 3. This Copyright notice may not be removed or altered from
- * any source or altered source distribution.
- *
- * The Contributing Authors and Group 42, Inc. specifically permit, without
- * fee, and encourage the use of this source code as a component to
- * supporting the PNG file format in commercial products. If you use this
- * source code in a product, acknowledgment is not required but would be
- * appreciated.
- */
-
-/*
- * A "png_get_copyright" function is available, for convenient use in "about"
- * boxes and the like:
- *
- * printf("%s", png_get_copyright(NULL));
- *
- * Also, the PNG logo (in PNG format, of course) is supplied in the
- * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
- */
-
-/*
- * Libpng is OSI Certified Open Source Software. OSI Certified is a
- * certification mark of the Open Source Initiative.
- */
-
-/*
- * The contributing authors would like to thank all those who helped
- * with testing, bug fixes, and patience. This wouldn't have been
- * possible without all of you.
- *
- * Thanks to Frank J. T. Wojcik for helping with the documentation.
- */
-
-/*
- * Y2K compliance in libpng:
- * =========================
- *
- * March 31, 2011
- *
- * Since the PNG Development group is an ad-hoc body, we can't make
- * an official declaration.
- *
- * This is your unofficial assurance that libpng from version 0.71 and
- * upward through 1.5.2 are Y2K compliant. It is my belief that
- * earlier versions were also Y2K compliant.
- *
- * Libpng only has three year fields. One is a 2-byte unsigned integer
- * that will hold years up to 65535. The other two hold the date in text
- * format, and will hold years up to 9999.
- *
- * The integer is
- * "png_uint_16 year" in png_time_struct.
- *
- * The strings are
- * "png_charp time_buffer" in png_struct and
- * "near_time_buffer", which is a local character string in png.c.
- *
- * There are seven time-related functions:
- * png.c: png_convert_to_rfc_1123() in png.c
- * (formerly png_convert_to_rfc_1152() in error)
- * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c
- * png_convert_from_time_t() in pngwrite.c
- * png_get_tIME() in pngget.c
- * png_handle_tIME() in pngrutil.c, called in pngread.c
- * png_set_tIME() in pngset.c
- * png_write_tIME() in pngwutil.c, called in pngwrite.c
- *
- * All handle dates properly in a Y2K environment. The
- * png_convert_from_time_t() function calls gmtime() to convert from system
- * clock time, which returns (year - 1900), which we properly convert to
- * the full 4-digit year. There is a possibility that applications using
- * libpng are not passing 4-digit years into the png_convert_to_rfc_1123()
- * function, or that they are incorrectly passing only a 2-digit year
- * instead of "year - 1900" into the png_convert_from_struct_tm() function,
- * but this is not under our control. The libpng documentation has always
- * stated that it works with 4-digit years, and the APIs have been
- * documented as such.
- *
- * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned
- * integer to hold the year, and can hold years as large as 65535.
- *
- * zlib, upon which libpng depends, is also Y2K compliant. It contains
- * no date-related code.
- *
- * Glenn Randers-Pehrson
- * libpng maintainer
- * PNG Development Group
- */
-
-#ifndef PNG_H
-#define PNG_H
-
-/* This is not the place to learn how to use libpng. The file libpng-manual.txt
- * describes how to use libpng, and the file example.c summarizes it
- * with some code on which to build. This file is useful for looking
- * at the actual function definitions and structure components.
- */
-
-/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.5.2"
-#define PNG_HEADER_VERSION_STRING \
- " libpng version 1.5.2 - March 31, 2011\n"
-
-#define PNG_LIBPNG_VER_SONUM 15
-#define PNG_LIBPNG_VER_DLLNUM 15
-
-/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
-#define PNG_LIBPNG_VER_MAJOR 1
-#define PNG_LIBPNG_VER_MINOR 5
-#define PNG_LIBPNG_VER_RELEASE 2
-/* This should match the numeric part of the final component of
- * PNG_LIBPNG_VER_STRING, omitting any leading zero:
- */
-
-#define PNG_LIBPNG_VER_BUILD 0
-
-/* Release Status */
-#define PNG_LIBPNG_BUILD_ALPHA 1
-#define PNG_LIBPNG_BUILD_BETA 2
-#define PNG_LIBPNG_BUILD_RC 3
-#define PNG_LIBPNG_BUILD_STABLE 4
-#define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7
-
-/* Release-Specific Flags */
-#define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with
- PNG_LIBPNG_BUILD_STABLE only */
-#define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with
- PNG_LIBPNG_BUILD_SPECIAL */
-#define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
- PNG_LIBPNG_BUILD_PRIVATE */
-
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
-
-/* Careful here. At one time, Guy wanted to use 082, but that would be octal.
- * We must not include leading zeros.
- * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
- * version 1.0.0 was mis-numbered 100 instead of 10000). From
- * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
- */
-#define PNG_LIBPNG_VER 10502 /* 1.5.2 */
-
-/* Library configuration: these options cannot be changed after
- * the library has been built.
- */
-#ifndef PNGLCONF_H
- /* If pnglibconf.h is missing, you can
- * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h
- */
-# include "pnglibconf.h"
-#endif
-
-#ifndef PNG_VERSION_INFO_ONLY
-# ifndef PNG_BUILDING_SYMBOL_TABLE
- /*
- * Standard header files (not needed for the version info or while
- * building symbol table -- see scripts/pnglibconf.dfa)
- */
-# ifdef PNG_SETJMP_SUPPORTED
-# include <setjmp.h>
-# endif
-
- /* Need the time information for converting tIME chunks, it
- * defines struct tm:
- */
-# ifdef PNG_CONVERT_tIME_SUPPORTED
- /* "time.h" functions are not supported on all operating systems */
-# include <time.h>
-# endif
-# endif
-
-/* Machine specific configuration. */
-# include "pngconf.h"
-#endif
-
-/*
- * Added at libpng-1.2.8
- *
- * Ref MSDN: Private as priority over Special
- * VS_FF_PRIVATEBUILD File *was not* built using standard release
- * procedures. If this value is given, the StringFileInfo block must
- * contain a PrivateBuild string.
- *
- * VS_FF_SPECIALBUILD File *was* built by the original company using
- * standard release procedures but is a variation of the standard
- * file of the same version number. If this value is given, the
- * StringFileInfo block must contain a SpecialBuild string.
- */
-
-#ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */
-# define PNG_LIBPNG_BUILD_TYPE \
- (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
-#else
-# ifdef PNG_LIBPNG_SPECIALBUILD
-# define PNG_LIBPNG_BUILD_TYPE \
- (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
-# else
-# define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
-# endif
-#endif
-
-#ifndef PNG_VERSION_INFO_ONLY
-
-/* Inhibit C++ name-mangling for libpng functions but not for system calls. */
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-/* Version information for C files, stored in png.c. This had better match
- * the version above.
- */
-#define png_libpng_ver png_get_header_ver(NULL)
-
-/* This file is arranged in several sections:
- *
- * 1. Any configuration options that can be specified by for the application
- * code when it is built. (Build time configuration is in pnglibconf.h)
- * 2. Type definitions (base types are defined in pngconf.h), structure
- * definitions.
- * 3. Exported library functions.
- *
- * The library source code has additional files (principally pngpriv.h) that
- * allow configuration of the library.
- */
-/* Section 1: run time configuration
- * See pnglibconf.h for build time configuration
- *
- * Run time configuration allows the application to choose between
- * implementations of certain arithmetic APIs. The default is set
- * at build time and recorded in pnglibconf.h, but it is safe to
- * override these (and only these) settings. Note that this won't
- * change what the library does, only application code, and the
- * settings can (and probably should) be made on a per-file basis
- * by setting the #defines before including png.h
- *
- * Use macros to read integers from PNG data or use the exported
- * functions?
- * PNG_USE_READ_MACROS: use the macros (see below) Note that
- * the macros evaluate their argument multiple times.
- * PNG_NO_USE_READ_MACROS: call the relevant library function.
- *
- * Use the alternative algorithm for compositing alpha samples that
- * does not use division?
- * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division'
- * algorithm.
- * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm.
- *
- * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is
- * false?
- * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error
- * APIs to png_warning.
- * Otherwise the calls are mapped to png_error.
- */
-
-/* Section 2: type definitions, including structures and compile time
- * constants.
- * See pngconf.h for base types that vary by machine/system
- */
-
-/* This triggers a compiler error in png.c, if png.c and png.h
- * do not agree upon the version number.
- */
-typedef char* png_libpng_version_1_5_2;
-
-/* Three color definitions. The order of the red, green, and blue, (and the
- * exact size) is not important, although the size of the fields need to
- * be png_byte or png_uint_16 (as defined below).
- */
-typedef struct png_color_struct
-{
- png_byte red;
- png_byte green;
- png_byte blue;
-} png_color;
-typedef png_color FAR * png_colorp;
-typedef PNG_CONST png_color FAR * png_const_colorp;
-typedef png_color FAR * FAR * png_colorpp;
-
-typedef struct png_color_16_struct
-{
- png_byte index; /* used for palette files */
- png_uint_16 red; /* for use in red green blue files */
- png_uint_16 green;
- png_uint_16 blue;
- png_uint_16 gray; /* for use in grayscale files */
-} png_color_16;
-typedef png_color_16 FAR * png_color_16p;
-typedef PNG_CONST png_color_16 FAR * png_const_color_16p;
-typedef png_color_16 FAR * FAR * png_color_16pp;
-
-typedef struct png_color_8_struct
-{
- png_byte red; /* for use in red green blue files */
- png_byte green;
- png_byte blue;
- png_byte gray; /* for use in grayscale files */
- png_byte alpha; /* for alpha channel files */
-} png_color_8;
-typedef png_color_8 FAR * png_color_8p;
-typedef PNG_CONST png_color_8 FAR * png_const_color_8p;
-typedef png_color_8 FAR * FAR * png_color_8pp;
-
-/*
- * The following two structures are used for the in-core representation
- * of sPLT chunks.
- */
-typedef struct png_sPLT_entry_struct
-{
- png_uint_16 red;
- png_uint_16 green;
- png_uint_16 blue;
- png_uint_16 alpha;
- png_uint_16 frequency;
-} png_sPLT_entry;
-typedef png_sPLT_entry FAR * png_sPLT_entryp;
-typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp;
-typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp;
-
-/* When the depth of the sPLT palette is 8 bits, the color and alpha samples
- * occupy the LSB of their respective members, and the MSB of each member
- * is zero-filled. The frequency member always occupies the full 16 bits.
- */
-
-typedef struct png_sPLT_struct
-{
- png_charp name; /* palette name */
- png_byte depth; /* depth of palette samples */
- png_sPLT_entryp entries; /* palette entries */
- png_int_32 nentries; /* number of palette entries */
-} png_sPLT_t;
-typedef png_sPLT_t FAR * png_sPLT_tp;
-typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp;
-typedef png_sPLT_t FAR * FAR * png_sPLT_tpp;
-
-#ifdef PNG_TEXT_SUPPORTED
-/* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file,
- * and whether that contents is compressed or not. The "key" field
- * points to a regular zero-terminated C string. The "text", "lang", and
- * "lang_key" fields can be regular C strings, empty strings, or NULL pointers.
- * However, the * structure returned by png_get_text() will always contain
- * regular zero-terminated C strings (possibly empty), never NULL pointers,
- * so they can be safely used in printf() and other string-handling functions.
- */
-typedef struct png_text_struct
-{
- int compression; /* compression value:
- -1: tEXt, none
- 0: zTXt, deflate
- 1: iTXt, none
- 2: iTXt, deflate */
- png_charp key; /* keyword, 1-79 character description of "text" */
- png_charp text; /* comment, may be an empty string (ie "")
- or a NULL pointer */
- png_size_t text_length; /* length of the text string */
- png_size_t itxt_length; /* length of the itxt string */
- png_charp lang; /* language code, 0-79 characters
- or a NULL pointer */
- png_charp lang_key; /* keyword translated UTF-8 string, 0 or more
- chars or a NULL pointer */
-} png_text;
-typedef png_text FAR * png_textp;
-typedef PNG_CONST png_text FAR * png_const_textp;
-typedef png_text FAR * FAR * png_textpp;
-#endif
-
-/* Supported compression types for text in PNG files (tEXt, and zTXt).
- * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */
-#define PNG_TEXT_COMPRESSION_NONE_WR -3
-#define PNG_TEXT_COMPRESSION_zTXt_WR -2
-#define PNG_TEXT_COMPRESSION_NONE -1
-#define PNG_TEXT_COMPRESSION_zTXt 0
-#define PNG_ITXT_COMPRESSION_NONE 1
-#define PNG_ITXT_COMPRESSION_zTXt 2
-#define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */
-
-/* png_time is a way to hold the time in an machine independent way.
- * Two conversions are provided, both from time_t and struct tm. There
- * is no portable way to convert to either of these structures, as far
- * as I know. If you know of a portable way, send it to me. As a side
- * note - PNG has always been Year 2000 compliant!
- */
-typedef struct png_time_struct
-{
- png_uint_16 year; /* full year, as in, 1995 */
- png_byte month; /* month of year, 1 - 12 */
- png_byte day; /* day of month, 1 - 31 */
- png_byte hour; /* hour of day, 0 - 23 */
- png_byte minute; /* minute of hour, 0 - 59 */
- png_byte second; /* second of minute, 0 - 60 (for leap seconds) */
-} png_time;
-typedef png_time FAR * png_timep;
-typedef PNG_CONST png_time FAR * png_const_timep;
-typedef png_time FAR * FAR * png_timepp;
-
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
- defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
-/* png_unknown_chunk is a structure to hold queued chunks for which there is
- * no specific support. The idea is that we can use this to queue
- * up private chunks for output even though the library doesn't actually
- * know about their semantics.
- */
-typedef struct png_unknown_chunk_t
-{
- png_byte name[5];
- png_byte *data;
- png_size_t size;
-
- /* libpng-using applications should NOT directly modify this byte. */
- png_byte location; /* mode of operation at read time */
-}
-png_unknown_chunk;
-typedef png_unknown_chunk FAR * png_unknown_chunkp;
-typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp;
-typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp;
-#endif
-
-typedef struct png_info_def png_info;
-typedef png_info FAR * png_infop;
-typedef PNG_CONST png_info FAR * png_const_infop;
-typedef png_info FAR * FAR * png_infopp;
-
-/* Maximum positive integer used in PNG is (2^31)-1 */
-#define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL)
-#define PNG_UINT_32_MAX ((png_uint_32)(-1))
-#define PNG_SIZE_MAX ((png_size_t)(-1))
-
-/* These are constants for fixed point values encoded in the
- * PNG specification manner (x100000)
- */
-#define PNG_FP_1 100000
-#define PNG_FP_HALF 50000
-
-/* These describe the color_type field in png_info. */
-/* color type masks */
-#define PNG_COLOR_MASK_PALETTE 1
-#define PNG_COLOR_MASK_COLOR 2
-#define PNG_COLOR_MASK_ALPHA 4
-
-/* color types. Note that not all combinations are legal */
-#define PNG_COLOR_TYPE_GRAY 0
-#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
-#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR)
-#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
-#define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA)
-/* aliases */
-#define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA
-#define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA
-
-/* This is for compression type. PNG 1.0-1.2 only define the single type. */
-#define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */
-#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE
-
-/* This is for filter type. PNG 1.0-1.2 only define the single type. */
-#define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */
-#define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */
-#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE
-
-/* These are for the interlacing type. These values should NOT be changed. */
-#define PNG_INTERLACE_NONE 0 /* Non-interlaced image */
-#define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */
-#define PNG_INTERLACE_LAST 2 /* Not a valid value */
-
-/* These are for the oFFs chunk. These values should NOT be changed. */
-#define PNG_OFFSET_PIXEL 0 /* Offset in pixels */
-#define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */
-#define PNG_OFFSET_LAST 2 /* Not a valid value */
-
-/* These are for the pCAL chunk. These values should NOT be changed. */
-#define PNG_EQUATION_LINEAR 0 /* Linear transformation */
-#define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */
-#define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */
-#define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */
-#define PNG_EQUATION_LAST 4 /* Not a valid value */
-
-/* These are for the sCAL chunk. These values should NOT be changed. */
-#define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */
-#define PNG_SCALE_METER 1 /* meters per pixel */
-#define PNG_SCALE_RADIAN 2 /* radians per pixel */
-#define PNG_SCALE_LAST 3 /* Not a valid value */
-
-/* These are for the pHYs chunk. These values should NOT be changed. */
-#define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */
-#define PNG_RESOLUTION_METER 1 /* pixels/meter */
-#define PNG_RESOLUTION_LAST 2 /* Not a valid value */
-
-/* These are for the sRGB chunk. These values should NOT be changed. */
-#define PNG_sRGB_INTENT_PERCEPTUAL 0
-#define PNG_sRGB_INTENT_RELATIVE 1
-#define PNG_sRGB_INTENT_SATURATION 2
-#define PNG_sRGB_INTENT_ABSOLUTE 3
-#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */
-
-/* This is for text chunks */
-#define PNG_KEYWORD_MAX_LENGTH 79
-
-/* Maximum number of entries in PLTE/sPLT/tRNS arrays */
-#define PNG_MAX_PALETTE_LENGTH 256
-
-/* These determine if an ancillary chunk's data has been successfully read
- * from the PNG header, or if the application has filled in the corresponding
- * data in the info_struct to be written into the output file. The values
- * of the PNG_INFO_<chunk> defines should NOT be changed.
- */
-#define PNG_INFO_gAMA 0x0001
-#define PNG_INFO_sBIT 0x0002
-#define PNG_INFO_cHRM 0x0004
-#define PNG_INFO_PLTE 0x0008
-#define PNG_INFO_tRNS 0x0010
-#define PNG_INFO_bKGD 0x0020
-#define PNG_INFO_hIST 0x0040
-#define PNG_INFO_pHYs 0x0080
-#define PNG_INFO_oFFs 0x0100
-#define PNG_INFO_tIME 0x0200
-#define PNG_INFO_pCAL 0x0400
-#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */
-#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */
-#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */
-#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */
-#define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */
-
-/* This is used for the transformation routines, as some of them
- * change these values for the row. It also should enable using
- * the routines for other purposes.
- */
-typedef struct png_row_info_struct
-{
- png_uint_32 width; /* width of row */
- png_size_t rowbytes; /* number of bytes in row */
- png_byte color_type; /* color type of row */
- png_byte bit_depth; /* bit depth of row */
- png_byte channels; /* number of channels (1, 2, 3, or 4) */
- png_byte pixel_depth; /* bits per pixel (depth * channels) */
-} png_row_info;
-
-typedef png_row_info FAR * png_row_infop;
-typedef png_row_info FAR * FAR * png_row_infopp;
-
-/* These are the function types for the I/O functions and for the functions
- * that allow the user to override the default I/O functions with his or her
- * own. The png_error_ptr type should match that of user-supplied warning
- * and error functions, while the png_rw_ptr type should match that of the
- * user read/write data functions. Note that the 'write' function must not
- * modify the buffer it is passed. The 'read' function, on the other hand, is
- * expected to return the read data in the buffer.
- */
-typedef struct png_struct_def png_struct;
-typedef PNG_CONST png_struct FAR * png_const_structp;
-typedef png_struct FAR * png_structp;
-
-typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp));
-typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t));
-typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp));
-typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32,
- int));
-typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32,
- int));
-
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop));
-typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop));
-
-/* The following callback receives png_uint_32 row_number, int pass for the
- * png_bytep data of the row. When transforming an interlaced image the
- * row number is the row number within the sub-image of the interlace pass, so
- * the value will increase to the height of the sub-image (not the full image)
- * then reset to 0 for the next pass.
- *
- * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
- * find the output pixel (x,y) given an interlaced sub-image pixel
- * (row,col,pass). (See below for these macros.)
- */
-typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep,
- png_uint_32, int));
-#endif
-
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop,
- png_bytep));
-#endif
-
-#ifdef PNG_USER_CHUNKS_SUPPORTED
-typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp,
- png_unknown_chunkp));
-#endif
-#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
-typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp));
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
-/* This must match the function definition in <setjmp.h>, and the
- * application must include this before png.h to obtain the definition
- * of jmp_buf. The function is required to be PNG_NORETURN. (Note that
- * PNG_PTR_NORETURN is used here because current versions of the Microsoft
- * C compiler do not support the PNG_NORETURN attribute on a pointer.)
- *
- * If you get a type warning from the compiler when linking against this line
- * then your compiler has 'longjmp' that does not match the requirements of the
- * compiler that built libpng. You will have to write a wrapper function for
- * your compiler's longjmp and call png_set_longjmp_fn directly (not via the
- * png_jmpbuf macro.)
- *
- * If you get a warning here while building the library you will need to make
- * changes to ensure that pnglibconf.h records the calling convention used by
- * your compiler. This may be very difficult - try using a different compiler
- * to build the library!
- */
-typedef PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)),
- PNG_PTR_NORETURN);
-#endif
-
-/* Transform masks for the high-level interface */
-#define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */
-#define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */
-#define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */
-#define PNG_TRANSFORM_PACKING 0x0004 /* read and write */
-#define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */
-#define PNG_TRANSFORM_EXPAND 0x0010 /* read only */
-#define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */
-#define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */
-#define PNG_TRANSFORM_BGR 0x0080 /* read and write */
-#define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */
-#define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */
-#define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */
-#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */
-/* Added to libpng-1.2.34 */
-#define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER
-#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */
-/* Added to libpng-1.4.0 */
-#define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */
-
-/* Flags for MNG supported features */
-#define PNG_FLAG_MNG_EMPTY_PLTE 0x01
-#define PNG_FLAG_MNG_FILTER_64 0x04
-#define PNG_ALL_MNG_FEATURES 0x05
-
-/* NOTE: prior to 1.5 these functions had no 'API' style declaration,
- * this allowed the zlib default functions to be used on Windows
- * platforms. In 1.5 the zlib default malloc (which just calls malloc and
- * ignores the first argument) should be completely compatible with the
- * following.
- */
-typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp,
- png_alloc_size_t));
-typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp));
-
-typedef png_struct FAR * FAR * png_structpp;
-
-/* Section 3: exported functions
- * Here are the function definitions most commonly used. This is not
- * the place to find out how to use libpng. See libpng-manual.txt for the
- * full explanation, see example.c for the summary. This just provides
- * a simple one line description of the use of each function.
- *
- * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in
- * pngconf.h and in the *.dfn files in the scripts directory.
- *
- * PNG_EXPORT(ordinal, type, name, (args));
- *
- * ordinal: ordinal that is used while building
- * *.def files. The ordinal value is only
- * relevant when preprocessing png.h with
- * the *.dfn files for building symbol table
- * entries, and are removed by pngconf.h.
- * type: return type of the function
- * name: function name
- * args: function arguments, with types
- *
- * When we wish to append attributes to a function prototype we use
- * the PNG_EXPORTA() macro instead.
- *
- * PNG_EXPORTA(ordinal, type, name, (args), attributes);
- *
- * ordinal, type, name, and args: same as in PNG_EXPORT().
- * attributes: function attributes
- */
-
-/* Returns the version number of the library */
-PNG_EXPORT(1, png_uint_32, png_access_version_number, (void));
-
-/* Tell lib we have already handled the first <num_bytes> magic bytes.
- * Handling more than 8 bytes from the beginning of the file is an error.
- */
-PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes));
-
-/* Check sig[start] through sig[start + num_to_check - 1] to see if it's a
- * PNG file. Returns zero if the supplied bytes match the 8-byte PNG
- * signature, and non-zero otherwise. Having num_to_check == 0 or
- * start > 7 will always fail (ie return non-zero).
- */
-PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start,
- png_size_t num_to_check));
-
-/* Simple signature checking function. This is the same as calling
- * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n).
- */
-#define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n))
-
-/* Allocate and initialize png_ptr struct for reading, and any other memory. */
-PNG_EXPORTA(4, png_structp, png_create_read_struct,
- (png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn),
- PNG_ALLOCATED);
-
-/* Allocate and initialize png_ptr struct for writing, and any other memory */
-PNG_EXPORTA(5, png_structp, png_create_write_struct,
- (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
- png_error_ptr warn_fn),
- PNG_ALLOCATED);
-
-PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size,
- (png_const_structp png_ptr));
-
-PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr,
- png_size_t size));
-
-/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp
- * match up.
- */
-#ifdef PNG_SETJMP_SUPPORTED
-/* This function returns the jmp_buf built in to *png_ptr. It must be
- * supplied with an appropriate 'longjmp' function to use on that jmp_buf
- * unless the default error function is overridden in which case NULL is
- * acceptable. The size of the jmp_buf is checked against the actual size
- * allocated by the library - the call will return NULL on a mismatch
- * indicating an ABI mismatch.
- */
-PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr,
- png_longjmp_ptr longjmp_fn, size_t jmp_buf_size));
-# define png_jmpbuf(png_ptr) \
- (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf)))
-#else
-# define png_jmpbuf(png_ptr) \
- (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP)
-#endif
-/* This function should be used by libpng applications in place of
- * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it
- * will use it; otherwise it will call PNG_ABORT(). This function was
- * added in libpng-1.5.0.
- */
-PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val),
- PNG_NORETURN);
-
-#ifdef PNG_READ_SUPPORTED
-/* Reset the compression stream */
-PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr));
-#endif
-
-/* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */
-#ifdef PNG_USER_MEM_SUPPORTED
-PNG_EXPORTA(11, png_structp, png_create_read_struct_2,
- (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
- png_error_ptr warn_fn,
- png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),
- PNG_ALLOCATED);
-PNG_EXPORTA(12, png_structp, png_create_write_struct_2,
- (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
- png_error_ptr warn_fn,
- png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),
- PNG_ALLOCATED);
-#endif
-
-/* Write the PNG file signature. */
-PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr));
-
-/* Write a PNG chunk - size, type, (optional) data, CRC. */
-PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep
- chunk_name, png_const_bytep data, png_size_t length));
-
-/* Write the start of a PNG chunk - length and chunk name. */
-PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr,
- png_const_bytep chunk_name, png_uint_32 length));
-
-/* Write the data of a PNG chunk started with png_write_chunk_start(). */
-PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr,
- png_const_bytep data, png_size_t length));
-
-/* Finish a chunk started with png_write_chunk_start() (includes CRC). */
-PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr));
-
-/* Allocate and initialize the info structure */
-PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr),
- PNG_ALLOCATED);
-
-PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr,
- png_size_t png_info_struct_size));
-
-/* Writes all the PNG information before the image. */
-PNG_EXPORT(20, void, png_write_info_before_PLTE,
- (png_structp png_ptr, png_infop info_ptr));
-PNG_EXPORT(21, void, png_write_info,
- (png_structp png_ptr, png_infop info_ptr));
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read the information before the actual image data. */
-PNG_EXPORT(22, void, png_read_info,
- (png_structp png_ptr, png_infop info_ptr));
-#endif
-
-#ifdef PNG_TIME_RFC1123_SUPPORTED
-PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123,
- (png_structp png_ptr,
- png_const_timep ptime));
-#endif
-
-#ifdef PNG_CONVERT_tIME_SUPPORTED
-/* Convert from a struct tm to png_time */
-PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime,
- PNG_CONST struct tm FAR * ttime));
-
-/* Convert from time_t to png_time. Uses gmtime() */
-PNG_EXPORT(25, void, png_convert_from_time_t,
- (png_timep ptime, time_t ttime));
-#endif /* PNG_CONVERT_tIME_SUPPORTED */
-
-#ifdef PNG_READ_EXPAND_SUPPORTED
-/* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */
-PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr));
-PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr));
-PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr));
-PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr));
-#endif
-
-#ifdef PNG_READ_EXPAND_16_SUPPORTED
-/* Expand to 16 bit channels, forces conversion of palette to RGB and expansion
- * of a tRNS chunk if present.
- */
-PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr));
-#endif
-
-#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-/* Use blue, green, red order for pixels. */
-PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr));
-#endif
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
-/* Expand the grayscale to 24-bit RGB if necessary. */
-PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr));
-#endif
-
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-/* Reduce RGB to grayscale. */
-PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr,
- int error_action, double red, double green));
-PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr,
- int error_action, png_fixed_point red, png_fixed_point green));
-
-PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp
- png_ptr));
-#endif
-
-PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth,
- png_colorp palette));
-
-#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
-PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr));
-#endif
-
-#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
- defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
-PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr));
-#endif
-
-#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
- defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
-PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr));
-#endif
-
-#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
-/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */
-PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler,
- int flags));
-/* The values of the PNG_FILLER_ defines should NOT be changed */
-# define PNG_FILLER_BEFORE 0
-# define PNG_FILLER_AFTER 1
-/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */
-PNG_EXPORT(40, void, png_set_add_alpha,
- (png_structp png_ptr, png_uint_32 filler,
- int flags));
-#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */
-
-#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-/* Swap bytes in 16-bit depth files. */
-PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr));
-#endif
-
-#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
-/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */
-PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr));
-#endif
-
-#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \
- defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-/* Swap packing order of pixels in bytes. */
-PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr));
-#endif
-
-#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
-/* Converts files to legal bit depths. */
-PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p
- true_bits));
-#endif
-
-#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
- defined(PNG_WRITE_INTERLACING_SUPPORTED)
-/* Have the code handle the interlacing. Returns the number of passes.
- * MUST be called before png_read_update_info or png_start_read_image,
- * otherwise it will not have the desired effect. Note that it is still
- * necessary to call png_read_row or png_read_rows png_get_image_height
- * times for each pass.
-*/
-PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr));
-#endif
-
-#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
-/* Invert monochrome files */
-PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr));
-#endif
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
-/* Handle alpha and tRNS by replacing with a background color. */
-PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr,
- png_const_color_16p background_color, int background_gamma_code,
- int need_expand, double background_gamma));
-PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr,
- png_const_color_16p background_color, int background_gamma_code,
- int need_expand, png_fixed_point background_gamma));
-#endif
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
-# define PNG_BACKGROUND_GAMMA_UNKNOWN 0
-# define PNG_BACKGROUND_GAMMA_SCREEN 1
-# define PNG_BACKGROUND_GAMMA_FILE 2
-# define PNG_BACKGROUND_GAMMA_UNIQUE 3
-#endif
-
-#ifdef PNG_READ_16_TO_8_SUPPORTED
-/* Strip the second byte of information from a 16-bit depth file. */
-PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr));
-#endif
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
-/* Turn on quantizing, and reduce the palette to the number of colors
- * available.
- */
-PNG_EXPORT(49, void, png_set_quantize,
- (png_structp png_ptr, png_colorp palette,
- int num_palette, int maximum_colors, png_const_uint_16p histogram,
- int full_quantize));
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
-/* The threshold on gamma processing is configurable but hard-wired into the
- * library. The following is the floating point variant.
- */
-#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001)
-
-/* Handle gamma correction. Screen_gamma=(display_exponent) */
-PNG_FP_EXPORT(50, void, png_set_gamma,
- (png_structp png_ptr, double screen_gamma,
- double default_file_gamma));
-PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr,
- png_fixed_point screen_gamma, png_fixed_point default_file_gamma));
-#endif
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
-/* Set how many lines between output flushes - 0 for no flushing */
-PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows));
-/* Flush the current PNG output buffer */
-PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr));
-#endif
-
-/* Optional update palette with requested transformations */
-PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr));
-
-/* Optional call to update the users info structure */
-PNG_EXPORT(54, void, png_read_update_info,
- (png_structp png_ptr, png_infop info_ptr));
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read one or more rows of image data. */
-PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row,
- png_bytepp display_row, png_uint_32 num_rows));
-#endif
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read a row of data. */
-PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row,
- png_bytep display_row));
-#endif
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read the whole image into memory at once. */
-PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image));
-#endif
-
-/* Write a row of image data */
-PNG_EXPORT(58, void, png_write_row,
- (png_structp png_ptr, png_const_bytep row));
-
-/* Write a few rows of image data: (*row) is not written; however, the type
- * is declared as writeable to maintain compatibility with previous versions
- * of libpng and to allow the 'display_row' array from read_rows to be passed
- * unchanged to write_rows.
- */
-PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row,
- png_uint_32 num_rows));
-
-/* Write the image data */
-PNG_EXPORT(60, void, png_write_image,
- (png_structp png_ptr, png_bytepp image));
-
-/* Write the end of the PNG file. */
-PNG_EXPORT(61, void, png_write_end,
- (png_structp png_ptr, png_infop info_ptr));
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read the end of the PNG file. */
-PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr));
-#endif
-
-/* Free any memory associated with the png_info_struct */
-PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr,
- png_infopp info_ptr_ptr));
-
-/* Free any memory associated with the png_struct and the png_info_structs */
-PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr,
- png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr));
-
-/* Free any memory associated with the png_struct and the png_info_structs */
-PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr,
- png_infopp info_ptr_ptr));
-
-/* Set the libpng method of handling chunk CRC errors */
-PNG_EXPORT(66, void, png_set_crc_action,
- (png_structp png_ptr, int crit_action, int ancil_action));
-
-/* Values for png_set_crc_action() say how to handle CRC errors in
- * ancillary and critical chunks, and whether to use the data contained
- * therein. Note that it is impossible to "discard" data in a critical
- * chunk. For versions prior to 0.90, the action was always error/quit,
- * whereas in version 0.90 and later, the action for CRC errors in ancillary
- * chunks is warn/discard. These values should NOT be changed.
- *
- * value action:critical action:ancillary
- */
-#define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */
-#define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */
-#define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */
-#define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */
-#define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */
-#define PNG_CRC_NO_CHANGE 5 /* use current value use current value */
-
-/* These functions give the user control over the scan-line filtering in
- * libpng and the compression methods used by zlib. These functions are
- * mainly useful for testing, as the defaults should work with most users.
- * Those users who are tight on memory or want faster performance at the
- * expense of compression can modify them. See the compression library
- * header file (zlib.h) for an explination of the compression functions.
- */
-
-/* Set the filtering method(s) used by libpng. Currently, the only valid
- * value for "method" is 0.
- */
-PNG_EXPORT(67, void, png_set_filter,
- (png_structp png_ptr, int method, int filters));
-
-/* Flags for png_set_filter() to say which filters to use. The flags
- * are chosen so that they don't conflict with real filter types
- * below, in case they are supplied instead of the #defined constants.
- * These values should NOT be changed.
- */
-#define PNG_NO_FILTERS 0x00
-#define PNG_FILTER_NONE 0x08
-#define PNG_FILTER_SUB 0x10
-#define PNG_FILTER_UP 0x20
-#define PNG_FILTER_AVG 0x40
-#define PNG_FILTER_PAETH 0x80
-#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
- PNG_FILTER_AVG | PNG_FILTER_PAETH)
-
-/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now.
- * These defines should NOT be changed.
- */
-#define PNG_FILTER_VALUE_NONE 0
-#define PNG_FILTER_VALUE_SUB 1
-#define PNG_FILTER_VALUE_UP 2
-#define PNG_FILTER_VALUE_AVG 3
-#define PNG_FILTER_VALUE_PAETH 4
-#define PNG_FILTER_VALUE_LAST 5
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */
-/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_
- * defines, either the default (minimum-sum-of-absolute-differences), or
- * the experimental method (weighted-minimum-sum-of-absolute-differences).
- *
- * Weights are factors >= 1.0, indicating how important it is to keep the
- * filter type consistent between rows. Larger numbers mean the current
- * filter is that many times as likely to be the same as the "num_weights"
- * previous filters. This is cumulative for each previous row with a weight.
- * There needs to be "num_weights" values in "filter_weights", or it can be
- * NULL if the weights aren't being specified. Weights have no influence on
- * the selection of the first row filter. Well chosen weights can (in theory)
- * improve the compression for a given image.
- *
- * Costs are factors >= 1.0 indicating the relative decoding costs of a
- * filter type. Higher costs indicate more decoding expense, and are
- * therefore less likely to be selected over a filter with lower computational
- * costs. There needs to be a value in "filter_costs" for each valid filter
- * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't
- * setting the costs. Costs try to improve the speed of decompression without
- * unduly increasing the compressed image size.
- *
- * A negative weight or cost indicates the default value is to be used, and
- * values in the range [0.0, 1.0) indicate the value is to remain unchanged.
- * The default values for both weights and costs are currently 1.0, but may
- * change if good general weighting/cost heuristics can be found. If both
- * the weights and costs are set to 1.0, this degenerates the WEIGHTED method
- * to the UNWEIGHTED method, but with added encoding time/computation.
- */
-PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr,
- int heuristic_method, int num_weights, png_const_doublep filter_weights,
- png_const_doublep filter_costs));
-PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
- (png_structp png_ptr,
- int heuristic_method, int num_weights, png_const_fixed_point_p
- filter_weights, png_const_fixed_point_p filter_costs));
-#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
-
-/* Heuristic used for row filter selection. These defines should NOT be
- * changed.
- */
-#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */
-#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */
-#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */
-#define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */
-
-/* Set the library compression level. Currently, valid values range from
- * 0 - 9, corresponding directly to the zlib compression levels 0 - 9
- * (0 - no compression, 9 - "maximal" compression). Note that tests have
- * shown that zlib compression levels 3-6 usually perform as well as level 9
- * for PNG images, and do considerably fewer caclulations. In the future,
- * these values may not correspond directly to the zlib compression levels.
- */
-PNG_EXPORT(69, void, png_set_compression_level,
- (png_structp png_ptr, int level));
-
-PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr,
- int mem_level));
-
-PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr,
- int strategy));
-
-PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr,
- int window_bits));
-
-PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr,
- int method));
-
-/* These next functions are called for input/output, memory, and error
- * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c,
- * and call standard C I/O routines such as fread(), fwrite(), and
- * fprintf(). These functions can be made to use other I/O routines
- * at run time for those applications that need to handle I/O in a
- * different manner by calling png_set_???_fn(). See libpng-manual.txt for
- * more information.
- */
-
-#ifdef PNG_STDIO_SUPPORTED
-/* Initialize the input/output for the PNG file to the default functions. */
-PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp));
-#endif
-
-/* Replace the (error and abort), and warning functions with user
- * supplied functions. If no messages are to be printed you must still
- * write and use replacement functions. The replacement error_fn should
- * still do a longjmp to the last setjmp location if you are using this
- * method of error handling. If error_fn or warning_fn is NULL, the
- * default function will be used.
- */
-
-PNG_EXPORT(75, void, png_set_error_fn,
- (png_structp png_ptr, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warning_fn));
-
-/* Return the user pointer associated with the error functions */
-PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr));
-
-/* Replace the default data output functions with a user supplied one(s).
- * If buffered output is not used, then output_flush_fn can be set to NULL.
- * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time
- * output_flush_fn will be ignored (and thus can be NULL).
- * It is probably a mistake to use NULL for output_flush_fn if
- * write_data_fn is not also NULL unless you have built libpng with
- * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's
- * default flush function, which uses the standard *FILE structure, will
- * be used.
- */
-PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr,
- png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn));
-
-/* Replace the default data input function with a user supplied one. */
-PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr,
- png_rw_ptr read_data_fn));
-
-/* Return the user pointer associated with the I/O functions */
-PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr));
-
-PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr,
- png_read_status_ptr read_row_fn));
-
-PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr,
- png_write_status_ptr write_row_fn));
-
-#ifdef PNG_USER_MEM_SUPPORTED
-/* Replace the default memory allocation functions with user supplied one(s). */
-PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr,
- png_malloc_ptr malloc_fn, png_free_ptr free_fn));
-/* Return the user pointer associated with the memory functions */
-PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr));
-#endif
-
-#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
-PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr,
- png_user_transform_ptr read_user_transform_fn));
-#endif
-
-#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
-PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr,
- png_user_transform_ptr write_user_transform_fn));
-#endif
-
-#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
-PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr,
- png_voidp user_transform_ptr, int user_transform_depth,
- int user_transform_channels));
-/* Return the user pointer associated with the user transform functions */
-PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr,
- (png_const_structp png_ptr));
-#endif
-
-#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
-/* Return information about the row currently being processed. Note that these
- * APIs do not fail but will return unexpected results if called outside a user
- * transform callback. Also note that when transforming an interlaced image the
- * row number is the row number within the sub-image of the interlace pass, so
- * the value will increase to the height of the sub-image (not the full image)
- * then reset to 0 for the next pass.
- *
- * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
- * find the output pixel (x,y) given an interlaced sub-image pixel
- * (row,col,pass). (See below for these macros.)
- */
-PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp));
-PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp));
-#endif
-
-#ifdef PNG_USER_CHUNKS_SUPPORTED
-PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr,
- png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
-PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr));
-#endif
-
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-/* Sets the function callbacks for the push reader, and a pointer to a
- * user-defined structure available to the callback functions.
- */
-PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr,
- png_voidp progressive_ptr, png_progressive_info_ptr info_fn,
- png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn));
-
-/* Returns the user pointer associated with the push read functions */
-PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr));
-
-/* Function to be called when data becomes available */
-PNG_EXPORT(92, void, png_process_data,
- (png_structp png_ptr, png_infop info_ptr,
- png_bytep buffer, png_size_t buffer_size));
-
-/* A function which may be called *only* within png_process_data to stop the
- * processing of any more data. The function returns the number of bytes
- * remaining, excluding any that libpng has cached internally. A subsequent
- * call to png_process_data must supply these bytes again. If the argument
- * 'save' is set to true the routine will first save all the pending data and
- * will always return 0.
- */
-PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save));
-
-/* A function which may be called *only* outside (after) a call to
- * png_process_data. It returns the number of bytes of data to skip in the
- * input. Normally it will return 0, but if it returns a non-zero value the
- * application must skip than number of bytes of input data and pass the
- * following data to the next call to png_process_data.
- */
-PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp));
-
-/* Function that combines rows. 'new_row' is a flag that should come from
- * the callback and be non-NULL if anything needs to be done; the library
- * stores its own version of the new data internally and ignores the passed
- * in value.
- */
-PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr,
- png_bytep old_row, png_const_bytep new_row));
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
-
-PNG_EXPORTA(94, png_voidp, png_malloc,
- (png_structp png_ptr, png_alloc_size_t size),
- PNG_ALLOCATED);
-/* Added at libpng version 1.4.0 */
-PNG_EXPORTA(95, png_voidp, png_calloc,
- (png_structp png_ptr, png_alloc_size_t size),
- PNG_ALLOCATED);
-
-/* Added at libpng version 1.2.4 */
-PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr,
- png_alloc_size_t size), PNG_ALLOCATED);
-
-/* Frees a pointer allocated by png_malloc() */
-PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr));
-
-/* Free data that was allocated internally */
-PNG_EXPORT(98, void, png_free_data,
- (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num));
-
-/* Reassign responsibility for freeing existing data, whether allocated
- * by libpng or by the application */
-PNG_EXPORT(99, void, png_data_freer,
- (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask));
-
-/* Assignments for png_data_freer */
-#define PNG_DESTROY_WILL_FREE_DATA 1
-#define PNG_SET_WILL_FREE_DATA 1
-#define PNG_USER_WILL_FREE_DATA 2
-/* Flags for png_ptr->free_me and info_ptr->free_me */
-#define PNG_FREE_HIST 0x0008
-#define PNG_FREE_ICCP 0x0010
-#define PNG_FREE_SPLT 0x0020
-#define PNG_FREE_ROWS 0x0040
-#define PNG_FREE_PCAL 0x0080
-#define PNG_FREE_SCAL 0x0100
-#define PNG_FREE_UNKN 0x0200
-#define PNG_FREE_LIST 0x0400
-#define PNG_FREE_PLTE 0x1000
-#define PNG_FREE_TRNS 0x2000
-#define PNG_FREE_TEXT 0x4000
-#define PNG_FREE_ALL 0x7fff
-#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
-
-#ifdef PNG_USER_MEM_SUPPORTED
-PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr,
- png_alloc_size_t size), PNG_ALLOCATED);
-PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr));
-#endif
-
-#ifdef PNG_ERROR_TEXT_SUPPORTED
-/* Fatal error in PNG image of libpng - can't continue */
-PNG_EXPORTA(102, void, png_error,
- (png_structp png_ptr, png_const_charp error_message),
- PNG_NORETURN);
-
-/* The same, but the chunk name is prepended to the error string. */
-PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr,
- png_const_charp error_message), PNG_NORETURN);
-
-#else
-/* Fatal error in PNG image of libpng - can't continue */
-PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN);
-#endif
-
-/* Non-fatal error in libpng. Can continue, but may have a problem. */
-PNG_EXPORT(105, void, png_warning, (png_structp png_ptr,
- png_const_charp warning_message));
-
-/* Non-fatal error in libpng, chunk name is prepended to message. */
-PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr,
- png_const_charp warning_message));
-
-#ifdef PNG_BENIGN_ERRORS_SUPPORTED
-/* Benign error in libpng. Can continue, but may have a problem.
- * User can choose whether to handle as a fatal error or as a warning. */
-# undef png_benign_error
-PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr,
- png_const_charp warning_message));
-
-/* Same, chunk name is prepended to message. */
-# undef png_chunk_benign_error
-PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr,
- png_const_charp warning_message));
-
-PNG_EXPORT(109, void, png_set_benign_errors,
- (png_structp png_ptr, int allowed));
-#else
-# ifdef PNG_ALLOW_BENIGN_ERRORS
-# define png_benign_error png_warning
-# define png_chunk_benign_error png_chunk_warning
-# else
-# define png_benign_error png_error
-# define png_chunk_benign_error png_chunk_error
-# endif
-#endif
-
-/* The png_set_<chunk> functions are for storing values in the png_info_struct.
- * Similarly, the png_get_<chunk> calls are used to read values from the
- * png_info_struct, either storing the parameters in the passed variables, or
- * setting pointers into the png_info_struct where the data is stored. The
- * png_get_<chunk> functions return a non-zero value if the data was available
- * in info_ptr, or return zero and do not change any of the parameters if the
- * data was not available.
- *
- * These functions should be used instead of directly accessing png_info
- * to avoid problems with future changes in the size and internal layout of
- * png_info_struct.
- */
-/* Returns "flag" if chunk data is valid in info_ptr. */
-PNG_EXPORT(110, png_uint_32, png_get_valid,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_uint_32 flag));
-
-/* Returns number of bytes needed to hold a transformed row. */
-PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr,
- png_const_infop info_ptr));
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
-/* Returns row_pointers, which is an array of pointers to scanlines that was
- * returned from png_read_png().
- */
-PNG_EXPORT(112, png_bytepp, png_get_rows,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-/* Set row_pointers, which is an array of pointers to scanlines for use
- * by png_write_png().
- */
-PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr,
- png_infop info_ptr, png_bytepp row_pointers));
-#endif
-
-/* Returns number of color channels in image. */
-PNG_EXPORT(114, png_byte, png_get_channels,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-
-#ifdef PNG_EASY_ACCESS_SUPPORTED
-/* Returns image width in pixels. */
-PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr,
- png_const_infop info_ptr));
-
-/* Returns image height in pixels. */
-PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr,
- png_const_infop info_ptr));
-
-/* Returns image bit_depth. */
-PNG_EXPORT(117, png_byte, png_get_bit_depth,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-
-/* Returns image color_type. */
-PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr,
- png_const_infop info_ptr));
-
-/* Returns image filter_type. */
-PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr,
- png_const_infop info_ptr));
-
-/* Returns image interlace_type. */
-PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr,
- png_const_infop info_ptr));
-
-/* Returns image compression_type. */
-PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr,
- png_const_infop info_ptr));
-
-/* Returns image resolution in pixels per meter, from pHYs chunk data. */
-PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-
-/* Returns pixel aspect ratio, computed from pHYs chunk data. */
-PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-
-/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */
-PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_EXPORT(128, png_int_32, png_get_x_offset_microns,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_EXPORT(129, png_int_32, png_get_y_offset_microns,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-
-#endif /* PNG_EASY_ACCESS_SUPPORTED */
-
-/* Returns pointer to signature string read from PNG header */
-PNG_EXPORT(130, png_const_bytep, png_get_signature,
- (png_const_structp png_ptr, png_infop info_ptr));
-
-#ifdef PNG_bKGD_SUPPORTED
-PNG_EXPORT(131, png_uint_32, png_get_bKGD,
- (png_const_structp png_ptr, png_infop info_ptr,
- png_color_16p *background));
-#endif
-
-#ifdef PNG_bKGD_SUPPORTED
-PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr,
- png_const_color_16p background));
-#endif
-
-#ifdef PNG_cHRM_SUPPORTED
-PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr,
- png_const_infop info_ptr, double *white_x, double *white_y, double *red_x,
- double *red_y, double *green_x, double *green_y, double *blue_x,
- double *blue_y));
-#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */
-PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
- (png_const_structp png_ptr,
- png_const_infop info_ptr, png_fixed_point *int_white_x,
- png_fixed_point *int_white_y, png_fixed_point *int_red_x,
- png_fixed_point *int_red_y, png_fixed_point *int_green_x,
- png_fixed_point *int_green_y, png_fixed_point *int_blue_x,
- png_fixed_point *int_blue_y));
-#endif
-#endif
-
-#ifdef PNG_cHRM_SUPPORTED
-PNG_FP_EXPORT(135, void, png_set_cHRM,
- (png_structp png_ptr, png_infop info_ptr,
- double white_x, double white_y, double red_x, double red_y, double green_x,
- double green_y, double blue_x, double blue_y));
-PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr,
- png_infop info_ptr, png_fixed_point int_white_x,
- png_fixed_point int_white_y, png_fixed_point int_red_x,
- png_fixed_point int_red_y, png_fixed_point int_green_x,
- png_fixed_point int_green_y, png_fixed_point int_blue_x,
- png_fixed_point int_blue_y));
-#endif
-
-#ifdef PNG_gAMA_SUPPORTED
-PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- double *file_gamma));
-PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_fixed_point *int_file_gamma));
-#endif
-
-#ifdef PNG_gAMA_SUPPORTED
-PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr,
- png_infop info_ptr, double file_gamma));
-PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr,
- png_infop info_ptr, png_fixed_point int_file_gamma));
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
-PNG_EXPORT(141, png_uint_32, png_get_hIST,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_uint_16p *hist));
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
-PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr,
- png_infop info_ptr, png_const_uint_16p hist));
-#endif
-
-PNG_EXPORT(143, png_uint_32, png_get_IHDR,
- (png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type,
- int *interlace_method, int *compression_method, int *filter_method));
-
-PNG_EXPORT(144, void, png_set_IHDR,
- (png_structp png_ptr, png_infop info_ptr,
- png_uint_32 width, png_uint_32 height, int bit_depth, int color_type,
- int interlace_method, int compression_method, int filter_method));
-
-#ifdef PNG_oFFs_SUPPORTED
-PNG_EXPORT(145, png_uint_32, png_get_oFFs,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type));
-#endif
-
-#ifdef PNG_oFFs_SUPPORTED
-PNG_EXPORT(146, void, png_set_oFFs,
- (png_structp png_ptr, png_infop info_ptr,
- png_int_32 offset_x, png_int_32 offset_y, int unit_type));
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
-PNG_EXPORT(147, png_uint_32, png_get_pCAL,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type,
- int *nparams,
- png_charp *units, png_charpp *params));
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
-PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr,
- png_infop info_ptr,
- png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
- int nparams, png_const_charp units, png_charpp params));
-#endif
-
-#ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(149, png_uint_32, png_get_pHYs,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
-#endif
-
-#ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(150, void, png_set_pHYs,
- (png_structp png_ptr, png_infop info_ptr,
- png_uint_32 res_x, png_uint_32 res_y, int unit_type));
-#endif
-
-PNG_EXPORT(151, png_uint_32, png_get_PLTE,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_colorp *palette, int *num_palette));
-
-PNG_EXPORT(152, void, png_set_PLTE,
- (png_structp png_ptr, png_infop info_ptr,
- png_const_colorp palette, int num_palette));
-
-#ifdef PNG_sBIT_SUPPORTED
-PNG_EXPORT(153, png_uint_32, png_get_sBIT,
- (png_const_structp png_ptr, png_infop info_ptr,
- png_color_8p *sig_bit));
-#endif
-
-#ifdef PNG_sBIT_SUPPORTED
-PNG_EXPORT(154, void, png_set_sBIT,
- (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit));
-#endif
-
-#ifdef PNG_sRGB_SUPPORTED
-PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr,
- png_const_infop info_ptr, int *file_srgb_intent));
-#endif
-
-#ifdef PNG_sRGB_SUPPORTED
-PNG_EXPORT(156, void, png_set_sRGB,
- (png_structp png_ptr, png_infop info_ptr, int srgb_intent));
-PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr,
- png_infop info_ptr, int srgb_intent));
-#endif
-
-#ifdef PNG_iCCP_SUPPORTED
-PNG_EXPORT(158, png_uint_32, png_get_iCCP,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_charpp name, int *compression_type, png_bytepp profile,
- png_uint_32 *proflen));
-#endif
-
-#ifdef PNG_iCCP_SUPPORTED
-PNG_EXPORT(159, void, png_set_iCCP,
- (png_structp png_ptr, png_infop info_ptr,
- png_const_charp name, int compression_type, png_const_bytep profile,
- png_uint_32 proflen));
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
-PNG_EXPORT(160, png_uint_32, png_get_sPLT,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_sPLT_tpp entries));
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
-PNG_EXPORT(161, void, png_set_sPLT,
- (png_structp png_ptr, png_infop info_ptr,
- png_const_sPLT_tp entries, int nentries));
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED
-/* png_get_text also returns the number of text chunks in *num_text */
-PNG_EXPORT(162, png_uint_32, png_get_text,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- png_textp *text_ptr, int *num_text));
-#endif
-
-/* Note while png_set_text() will accept a structure whose text,
- * language, and translated keywords are NULL pointers, the structure
- * returned by png_get_text will always contain regular
- * zero-terminated C strings. They might be empty strings but
- * they will never be NULL pointers.
- */
-
-#ifdef PNG_TEXT_SUPPORTED
-PNG_EXPORT(163, void, png_set_text,
- (png_structp png_ptr, png_infop info_ptr,
- png_const_textp text_ptr, int num_text));
-#endif
-
-#ifdef PNG_tIME_SUPPORTED
-PNG_EXPORT(164, png_uint_32, png_get_tIME,
- (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time));
-#endif
-
-#ifdef PNG_tIME_SUPPORTED
-PNG_EXPORT(165, void, png_set_tIME,
- (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time));
-#endif
-
-#ifdef PNG_tRNS_SUPPORTED
-PNG_EXPORT(166, png_uint_32, png_get_tRNS,
- (png_const_structp png_ptr, png_infop info_ptr,
- png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color));
-#endif
-
-#ifdef PNG_tRNS_SUPPORTED
-PNG_EXPORT(167, void, png_set_tRNS,
- (png_structp png_ptr, png_infop info_ptr,
- png_const_bytep trans_alpha, int num_trans,
- png_const_color_16p trans_color));
-#endif
-
-#ifdef PNG_sCAL_SUPPORTED
-PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- int *unit, double *width, double *height));
-#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
-/* NOTE: this API is currently implemented using floating point arithmetic,
- * consequently it can only be used on systems with floating point support.
- * In any case the range of values supported by png_fixed_point is small and it
- * is highly recommended that png_get_sCAL_s be used instead.
- */
-PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed,
- (png_structp png_ptr, png_const_infop info_ptr, int *unit,
- png_fixed_point *width,
- png_fixed_point *height));
-#endif
-PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
- (png_const_structp png_ptr, png_const_infop info_ptr,
- int *unit, png_charpp swidth, png_charpp sheight));
-
-PNG_FP_EXPORT(170, void, png_set_sCAL,
- (png_structp png_ptr, png_infop info_ptr,
- int unit, double width, double height));
-PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr,
- png_infop info_ptr, int unit, png_fixed_point width,
- png_fixed_point height));
-PNG_EXPORT(171, void, png_set_sCAL_s,
- (png_structp png_ptr, png_infop info_ptr,
- int unit, png_const_charp swidth, png_const_charp sheight));
-#endif /* PNG_sCAL_SUPPORTED */
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-/* Provide a list of chunks and how they are to be handled, if the built-in
- handling or default unknown chunk handling is not desired. Any chunks not
- listed will be handled in the default manner. The IHDR and IEND chunks
- must not be listed.
- keep = 0: follow default behaviour
- = 1: do not keep
- = 2: keep only if safe-to-copy
- = 3: keep even if unsafe-to-copy
-*/
-PNG_EXPORT(172, void, png_set_keep_unknown_chunks,
- (png_structp png_ptr, int keep,
- png_const_bytep chunk_list, int num_chunks));
-PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr,
- png_const_bytep chunk_name));
-#endif
-#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
-PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr,
- png_infop info_ptr, png_const_unknown_chunkp unknowns,
- int num_unknowns));
-PNG_EXPORT(175, void, png_set_unknown_chunk_location,
- (png_structp png_ptr, png_infop info_ptr, int chunk, int location));
-PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr,
- png_const_infop info_ptr, png_unknown_chunkpp entries));
-#endif
-
-/* Png_free_data() will turn off the "valid" flag for anything it frees.
- * If you need to turn it off for a chunk that your application has freed,
- * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK);
- */
-PNG_EXPORT(177, void, png_set_invalid,
- (png_structp png_ptr, png_infop info_ptr, int mask));
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
-/* The "params" pointer is currently not used and is for future expansion. */
-PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr,
- int transforms, png_voidp params));
-PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr,
- int transforms, png_voidp params));
-#endif
-
-PNG_EXPORT(180, png_const_charp, png_get_copyright,
- (png_const_structp png_ptr));
-PNG_EXPORT(181, png_const_charp, png_get_header_ver,
- (png_const_structp png_ptr));
-PNG_EXPORT(182, png_const_charp, png_get_header_version,
- (png_const_structp png_ptr));
-PNG_EXPORT(183, png_const_charp, png_get_libpng_ver,
- (png_const_structp png_ptr));
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
-PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr,
- png_uint_32 mng_features_permitted));
-#endif
-
-/* For use in png_set_keep_unknown, added to version 1.2.6 */
-#define PNG_HANDLE_CHUNK_AS_DEFAULT 0
-#define PNG_HANDLE_CHUNK_NEVER 1
-#define PNG_HANDLE_CHUNK_IF_SAFE 2
-#define PNG_HANDLE_CHUNK_ALWAYS 3
-
-/* Strip the prepended error numbers ("#nnn ") from error and warning
- * messages before passing them to the error or warning handler.
- */
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
-PNG_EXPORT(185, void, png_set_strip_error_numbers,
- (png_structp png_ptr,
- png_uint_32 strip_mode));
-#endif
-
-/* Added in libpng-1.2.6 */
-#ifdef PNG_SET_USER_LIMITS_SUPPORTED
-PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr,
- png_uint_32 user_width_max, png_uint_32 user_height_max));
-PNG_EXPORT(187, png_uint_32, png_get_user_width_max,
- (png_const_structp png_ptr));
-PNG_EXPORT(188, png_uint_32, png_get_user_height_max,
- (png_const_structp png_ptr));
-/* Added in libpng-1.4.0 */
-PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr,
- png_uint_32 user_chunk_cache_max));
-PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max,
- (png_const_structp png_ptr));
-/* Added in libpng-1.4.1 */
-PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr,
- png_alloc_size_t user_chunk_cache_max));
-PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max,
- (png_const_structp png_ptr));
-#endif
-
-#if defined(PNG_INCH_CONVERSIONS_SUPPORTED)
-PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-
-PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-
-PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-
-PNG_FP_EXPORT(196, float, png_get_x_offset_inches,
- (png_const_structp png_ptr, png_const_infop info_ptr));
-#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
-PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed,
- (png_structp png_ptr, png_const_infop info_ptr));
-#endif
-
-PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr,
- png_const_infop info_ptr));
-#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
-PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed,
- (png_structp png_ptr, png_const_infop info_ptr));
-#endif
-
-# ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr,
- png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y,
- int *unit_type));
-# endif /* PNG_pHYs_SUPPORTED */
-#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */
-
-/* Added in libpng-1.4.0 */
-#ifdef PNG_IO_STATE_SUPPORTED
-PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr));
-
-PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name,
- (png_structp png_ptr), PNG_DEPRECATED);
-PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
- (png_const_structp png_ptr));
-
-/* The flags returned by png_get_io_state() are the following: */
-# define PNG_IO_NONE 0x0000 /* no I/O at this moment */
-# define PNG_IO_READING 0x0001 /* currently reading */
-# define PNG_IO_WRITING 0x0002 /* currently writing */
-# define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */
-# define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */
-# define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */
-# define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */
-# define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */
-# define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */
-#endif /* ?PNG_IO_STATE_SUPPORTED */
-
-/* Interlace support. The following macros are always defined so that if
- * libpng interlace handling is turned off the macros may be used to handle
- * interlaced images within the application.
- */
-#define PNG_INTERLACE_ADAM7_PASSES 7
-
-/* Two macros to return the first row and first column of the original,
- * full, image which appears in a given pass. 'pass' is in the range 0
- * to 6 and the result is in the range 0 to 7.
- */
-#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7)
-#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7)
-
-/* Two macros to help evaluate the number of rows or columns in each
- * pass. This is expressed as a shift - effectively log2 of the number or
- * rows or columns in each 8x8 tile of the original image.
- */
-#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3)
-#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3)
-
-/* Hence two macros to determine the number of rows or columns in a given
- * pass of an image given its height or width. In fact these macros may
- * return non-zero even though the sub-image is empty, because the other
- * dimension may be empty for a small image.
- */
-#define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\
- -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass))
-#define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\
- -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass))
-
-/* For the reader row callbacks (both progressive and sequential) it is
- * necessary to find the row in the output image given a row in an interlaced
- * image, so two more macros:
- */
-#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \
- (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass))
-#define PNG_COL_FROM_PASS_COL(xIn, pass) \
- (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass))
-
-/* Two macros which return a boolean (0 or 1) saying whether the given row
- * or column is in a particular pass. These use a common utility macro that
- * returns a mask for a given pass - the offset 'off' selects the row or
- * column version. The mask has the appropriate bit set for each column in
- * the tile.
- */
-#define PNG_PASS_MASK(pass,off) ( \
- ((0x110145AFU>>(((7-(off))-(pass))<<2)) & 0xFU) | \
- ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U))
-
-#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \
- ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1)
-#define PNG_COL_IN_INTERLACE_PASS(x, pass) \
- ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1)
-
-#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
-/* With these routines we avoid an integer divide, which will be slower on
- * most machines. However, it does take more operations than the corresponding
- * divide method, so it may be slower on a few RISC systems. There are two
- * shifts (by 8 or 16 bits) and an addition, versus a single integer divide.
- *
- * Note that the rounding factors are NOT supposed to be the same! 128 and
- * 32768 are correct for the NODIV code; 127 and 32767 are correct for the
- * standard method.
- *
- * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ]
- */
-
- /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
-
-# define png_composite(composite, fg, alpha, bg) \
- { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \
- * (png_uint_16)(alpha) \
- + (png_uint_16)(bg)*(png_uint_16)(255 \
- - (png_uint_16)(alpha)) + (png_uint_16)128); \
- (composite) = (png_byte)((temp + (temp >> 8)) >> 8); }
-
-# define png_composite_16(composite, fg, alpha, bg) \
- { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \
- * (png_uint_32)(alpha) \
- + (png_uint_32)(bg)*(png_uint_32)(65535L \
- - (png_uint_32)(alpha)) + (png_uint_32)32768L); \
- (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); }
-
-#else /* Standard method using integer division */
-
-# define png_composite(composite, fg, alpha, bg) \
- (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
- (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
- (png_uint_16)127) / 255)
-
-# define png_composite_16(composite, fg, alpha, bg) \
- (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \
- (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
- (png_uint_32)32767) / (png_uint_32)65535L)
-#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */
-
-#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
-PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf));
-PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf));
-PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf));
-#endif
-
-PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr,
- png_const_bytep buf));
-/* No png_get_int_16 -- may be added if there's a real need for it. */
-
-/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */
-#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
-PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i));
-#endif
-#ifdef PNG_SAVE_INT_32_SUPPORTED
-PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i));
-#endif
-
-/* Place a 16-bit number into a buffer in PNG byte order.
- * The parameter is declared unsigned int, not png_uint_16,
- * just to avoid potential problems on pre-ANSI C compilers.
- */
-#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
-PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
-/* No png_save_int_16 -- may be added if there's a real need for it. */
-#endif
-
-#ifdef PNG_USE_READ_MACROS
-/* Inline macros to do direct reads of bytes from the input buffer.
- * The png_get_int_32() routine assumes we are using two's complement
- * format for negative values, which is almost certainly true.
- */
-# define png_get_uint_32(buf) \
- (((png_uint_32)(*(buf)) << 24) + \
- ((png_uint_32)(*((buf) + 1)) << 16) + \
- ((png_uint_32)(*((buf) + 2)) << 8) + \
- ((png_uint_32)(*((buf) + 3))))
-
- /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
- * function) incorrectly returned a value of type png_uint_32.
- */
-# define png_get_uint_16(buf) \
- ((png_uint_16) \
- (((unsigned int)(*(buf)) << 8) + \
- ((unsigned int)(*((buf) + 1)))))
-
-# define png_get_int_32(buf) \
- ((png_int_32)((*(buf) & 0x80) \
- ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \
- : (png_int_32)png_get_uint_32(buf)))
-#endif
-
-/* Maintainer: Put new public prototypes here ^, in libpng.3, and project
- * defs
- */
-
-/* The last ordinal number (this is the *last* one already used; the next
- * one to use is one more than this.) Maintainer, remember to add an entry to
- * scripts/symbols.def as well.
- */
-#ifdef PNG_EXPORT_LAST_ORDINAL
- PNG_EXPORT_LAST_ORDINAL(221);
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* PNG_VERSION_INFO_ONLY */
-/* Do not put anything past this line */
-#endif /* PNG_H */
+++ /dev/null
-
-/* pngconf.h - machine configurable file for libpng
- *
- * libpng version 1.5.2 - March 31, 2011
- *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- */
-
-/* Any machine specific code is near the front of this file, so if you
- * are configuring libpng for a machine, you may want to read the section
- * starting here down to where it starts to typedef png_color, png_text,
- * and png_info.
- */
-
-#ifndef PNGCONF_H
-#define PNGCONF_H
-
-#ifndef PNG_BUILDING_SYMBOL_TABLE
-/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C
- * definition file for machine specific limits, this may impact the
- * correctness of the definitons below (see uses of INT_MAX).
- */
-# ifndef PNG_NO_LIMITS_H
-# include <limits.h>
-# endif
-
-/* For the memory copy APIs (i.e. the standard definitions of these),
- * because this file defines png_memcpy and so on the base APIs must
- * be defined here.
- */
-# ifdef BSD
-# include <strings.h>
-# else
-# include <string.h>
-# endif
-
-/* For png_FILE_p - this provides the standard definition of a
- * FILE
- */
-# ifdef PNG_STDIO_SUPPORTED
-# include <stdio.h>
-# endif
-#endif
-
-/* This controls optimization of the reading of 16 and 32 bit values
- * from PNG files. It can be set on a per-app-file basis - it
- * just changes whether a macro is used to the function is called.
- * The library builder sets the default, if read functions are not
- * built into the library the macro implementation is forced on.
- */
-#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
-# define PNG_USE_READ_MACROS
-#endif
-#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
-# if PNG_DEFAULT_READ_MACROS
-# define PNG_USE_READ_MACROS
-# endif
-#endif
-
-/* COMPILER SPECIFIC OPTIONS.
- *
- * These options are provided so that a variety of difficult compilers
- * can be used. Some are fixed at build time (e.g. PNG_API_RULE
- * below) but still have compiler specific implementations, others
- * may be changed on a per-file basis when compiling against libpng.
- */
-
-/* The PNGARG macro protects us against machines that don't have function
- * prototypes (ie K&R style headers). If your compiler does not handle
- * function prototypes, define this macro and use the included ansi2knr.
- * I've always been able to use _NO_PROTO as the indicator, but you may
- * need to drag the empty declaration out in front of here, or change the
- * ifdef to suit your own needs.
- */
-#ifndef PNGARG
-
-# ifdef OF /* zlib prototype munger */
-# define PNGARG(arglist) OF(arglist)
-# else
-
-# ifdef _NO_PROTO
-# define PNGARG(arglist) ()
-# else
-# define PNGARG(arglist) arglist
-# endif /* _NO_PROTO */
-
-# endif /* OF */
-
-#endif /* PNGARG */
-
-/* Function calling conventions.
- * =============================
- * Normally it is not necessary to specify to the compiler how to call
- * a function - it just does it - however on x86 systems derived from
- * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
- * and some others) there are multiple ways to call a function and the
- * default can be changed on the compiler command line. For this reason
- * libpng specifies the calling convention of every exported function and
- * every function called via a user supplied function pointer. This is
- * done in this file by defining the following macros:
- *
- * PNGAPI Calling convention for exported functions.
- * PNGCBAPI Calling convention for user provided (callback) functions.
- * PNGCAPI Calling convention used by the ANSI-C library (required
- * for longjmp callbacks and sometimes used internally to
- * specify the calling convention for zlib).
- *
- * These macros should never be overridden. If it is necessary to
- * change calling convention in a private build this can be done
- * by setting PNG_API_RULE (which defaults to 0) to one of the values
- * below to select the correct 'API' variants.
- *
- * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
- * This is correct in every known environment.
- * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
- * the 'C' calling convention (from PNGCAPI) for
- * callbacks (PNGCBAPI). This is no longer required
- * in any known environment - if it has to be used
- * please post an explanation of the problem to the
- * libpng mailing list.
- *
- * These cases only differ if the operating system does not use the C
- * calling convention, at present this just means the above cases
- * (x86 DOS/Windows sytems) and, even then, this does not apply to
- * Cygwin running on those systems.
- *
- * Note that the value must be defined in pnglibconf.h so that what
- * the application uses to call the library matches the conventions
- * set when building the library.
- */
-
-/* Symbol export
- * =============
- * When building a shared library it is almost always necessary to tell
- * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
- * is used to mark the symbols. On some systems these symbols can be
- * extracted at link time and need no special processing by the compiler,
- * on other systems the symbols are flagged by the compiler and just
- * the declaration requires a special tag applied (unfortunately) in a
- * compiler dependent way. Some systems can do either.
- *
- * A small number of older systems also require a symbol from a DLL to
- * be flagged to the program that calls it. This is a problem because
- * we do not know in the header file included by application code that
- * the symbol will come from a shared library, as opposed to a statically
- * linked one. For this reason the application must tell us by setting
- * the magic flag PNG_USE_DLL to turn on the special processing before
- * it includes png.h.
- *
- * Four additional macros are used to make this happen:
- *
- * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
- * the build or imported if PNG_USE_DLL is set - compiler
- * and system specific.
- *
- * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
- * 'type', compiler specific.
- *
- * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
- * make a symbol exported from the DLL.
- *
- * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
- * from a DLL - used to define PNG_IMPEXP when
- * PNG_USE_DLL is set.
- */
-
-/* System specific discovery.
- * ==========================
- * This code is used at build time to find PNG_IMPEXP, the API settings
- * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
- * import processing is possible. On Windows/x86 systems it also sets
- * compiler-specific macros to the values required to change the calling
- * conventions of the various functions.
- */
-#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
- defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
- ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
- defined(_M_X64) || defined(_M_IA64) )
- /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes
- * builds under Cygwin or MinGW. Also includes Watcom builds but these need
- * special treatment because they are not compatible with GCC or Visual C
- * because of different calling conventions.
- */
-# if PNG_API_RULE == 2
- /* If this line results in an error, either because __watcall is not
- * understood or because of a redefine just below you cannot use *this*
- * build of the library with the compiler you are using. *This* build was
- * build using Watcom and applications must also be built using Watcom!
- */
-# define PNGCAPI __watcall
-# endif
-
-# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
-# define PNGCAPI __cdecl
-# if PNG_API_RULE == 1
-# define PNGAPI __stdcall
-# endif
-# else
- /* An older compiler, or one not detected (erroneously) above,
- * if necessary override on the command line to get the correct
- * variants for the compiler.
- */
-# ifndef PNGCAPI
-# define PNGCAPI _cdecl
-# endif
-# if PNG_API_RULE == 1 && !defined(PNGAPI)
-# define PNGAPI _stdcall
-# endif
-# endif /* compiler/api */
- /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
-
-# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
- ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed
-# endif
-
-# if (defined(_MSC_VER) && _MSC_VER < 800) ||\
- (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
- /* older Borland and MSC
- * compilers used '__export' and required this to be after
- * the type.
- */
-# ifndef PNG_EXPORT_TYPE
-# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
-# endif
-# define PNG_DLL_EXPORT __export
-# else /* newer compiler */
-# define PNG_DLL_EXPORT __declspec(dllexport)
-# ifndef PNG_DLL_IMPORT
-# define PNG_DLL_IMPORT __declspec(dllimport)
-# endif
-# endif /* compiler */
-
-#else /* !Windows/x86 */
-# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
-# define PNGAPI _System
-# else /* !Windows/x86 && !OS/2 */
- /* Use the defaults, or define PNG*API on the command line (but
- * this will have to be done for every compile!)
- */
-# endif /* other system, !OS/2 */
-#endif /* !Windows/x86 */
-
-/* Now do all the defaulting . */
-#ifndef PNGCAPI
-# define PNGCAPI
-#endif
-#ifndef PNGCBAPI
-# define PNGCBAPI PNGCAPI
-#endif
-#ifndef PNGAPI
-# define PNGAPI PNGCAPI
-#endif
-
-/* The default for PNG_IMPEXP depends on whether the library is
- * being built or used.
- */
-#ifndef PNG_IMPEXP
-# ifdef PNGLIB_BUILD
- /* Building the library */
-# if (defined(DLL_EXPORT)/*from libtool*/ ||\
- defined(_WINDLL) || defined(_DLL) || defined(__DLL__) ||\
- defined(_USRDLL) ||\
- defined(PNG_BUILD_DLL)) && defined(PNG_DLL_EXPORT)
- /* Building a DLL. */
-# define PNG_IMPEXP PNG_DLL_EXPORT
-# endif /* DLL */
-# else
- /* Using the library */
-# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
- /* This forces use of a DLL, disallowing static linking */
-# define PNG_IMPEXP PNG_DLL_IMPORT
-# endif
-# endif
-
-# ifndef PNG_IMPEXP
-# define PNG_IMPEXP
-# endif
-#endif
-
-/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
- * 'attributes' as a storage class - the attributes go at the start of the
- * function definition, and attributes are always appended regardless of the
- * compiler. This considerably simplifies these macros but may cause problems
- * if any compilers both need function attributes and fail to handle them as
- * a storage class (this is unlikely.)
- */
-#ifndef PNG_FUNCTION
-# define PNG_FUNCTION(type, name, args, attributes) attributes type name args
-#endif
-
-#ifndef PNG_EXPORT_TYPE
-# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
-#endif
-
- /* The ordinal value is only relevant when preprocessing png.h for symbol
- * table entries, so we discard it here. See the .dfn files in the
- * scripts directory.
- */
-#ifndef PNG_EXPORTA
-
-# define PNG_EXPORTA(ordinal, type, name, args, attributes)\
- PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
- extern attributes)
-#endif
-
-/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
- * so make something non-empty to satisfy the requirement:
- */
-#define PNG_EMPTY /*empty list*/
-
-#define PNG_EXPORT(ordinal, type, name, args)\
- PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
-
-/* Use PNG_REMOVED to comment out a removed interface. */
-#ifndef PNG_REMOVED
-# define PNG_REMOVED(ordinal, type, name, args, attributes)
-#endif
-
-#ifndef PNG_CALLBACK
-# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
-#endif
-
-/* Support for compiler specific function attributes. These are used
- * so that where compiler support is available incorrect use of API
- * functions in png.h will generate compiler warnings.
- *
- * Added at libpng-1.2.41.
- */
-
-#ifndef PNG_NO_PEDANTIC_WARNINGS
-# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
-# define PNG_PEDANTIC_WARNINGS_SUPPORTED
-# endif
-#endif
-
-#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
- /* Support for compiler specific function attributes. These are used
- * so that where compiler support is available incorrect use of API
- * functions in png.h will generate compiler warnings. Added at libpng
- * version 1.2.41.
- */
-# if defined(__GNUC__)
-# ifndef PNG_USE_RESULT
-# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
-# endif
-# ifndef PNG_NORETURN
-# define PNG_NORETURN __attribute__((__noreturn__))
-# endif
-# ifndef PNG_PTR_NORETURN
- /* It's not enough to have the compiler be the correct compiler at
- * this point - it's necessary for the library (which defines
- * the type of the library longjmp) to also be the GNU library.
- * This is because many systems use the GNU compiler with a
- * non-GNU libc implementation. Min/GW headers are also compatible
- * with GCC as well as uclibc, so it seems best to exclude known
- * problem libcs here rather than just including known libcs.
- *
- * NOTE: this relies on the only use of PNG_PTR_NORETURN being with
- * the system longjmp. If the same type is used elsewhere then this
- * will need to be changed.
- */
-# if !defined(__CYGWIN__)
-# define PNG_PTR_NORETURN __attribute__((__noreturn__))
-# endif
-# endif
-# ifndef PNG_ALLOCATED
-# define PNG_ALLOCATED __attribute__((__malloc__))
-# endif
-
- /* This specifically protects structure members that should only be
- * accessed from within the library, therefore should be empty during
- * a library build.
- */
-# ifndef PNGLIB_BUILD
-# ifndef PNG_DEPRECATED
-# define PNG_DEPRECATED __attribute__((__deprecated__))
-# endif
-# ifndef PNG_DEPSTRUCT
-# define PNG_DEPSTRUCT __attribute__((__deprecated__))
-# endif
-# ifndef PNG_PRIVATE
-# if 0 /* Doesn't work so we use deprecated instead*/
-# define PNG_PRIVATE \
- __attribute__((warning("This function is not exported by libpng.")))
-# else
-# define PNG_PRIVATE \
- __attribute__((__deprecated__))
-# endif
-# endif
-# endif /* PNGLIB_BUILD */
-# endif /* __GNUC__ */
-
-# if defined(_MSC_VER) && (_MSC_VER >= 1300)
-# ifndef PNG_USE_RESULT
-# define PNG_USE_RESULT /* not supported */
-# endif
-# ifndef PNG_NORETURN
-# define PNG_NORETURN __declspec(noreturn)
-# endif
-# ifndef PNG_PTR_NORETURN
-# define PNG_PTR_NORETURN /* not supported */
-# endif
-# ifndef PNG_ALLOCATED
-# define PNG_ALLOCATED __declspec(restrict)
-# endif
-
- /* This specifically protects structure members that should only be
- * accessed from within the library, therefore should be empty during
- * a library build.
- */
-# ifndef PNGLIB_BUILD
-# ifndef PNG_DEPRECATED
-# define PNG_DEPRECATED __declspec(deprecated)
-# endif
-# ifndef PNG_DEPSTRUCT
-# define PNG_DEPSTRUCT __declspec(deprecated)
-# endif
-# ifndef PNG_PRIVATE
-# define PNG_PRIVATE __declspec(deprecated)
-# endif
-# endif /* PNGLIB_BUILD */
-# endif /* _MSC_VER */
-#endif /* PNG_PEDANTIC_WARNINGS */
-
-#ifndef PNG_DEPRECATED
-# define PNG_DEPRECATED /* Use of this function is deprecated */
-#endif
-#ifndef PNG_USE_RESULT
-# define PNG_USE_RESULT /* The result of this function must be checked */
-#endif
-#ifndef PNG_NORETURN
-# define PNG_NORETURN /* This function does not return */
-#endif
-#ifndef PNG_PTR_NORETURN
-# define PNG_PTR_NORETURN /* This function does not return */
-#endif
-#ifndef PNG_ALLOCATED
-# define PNG_ALLOCATED /* The result of the function is new memory */
-#endif
-#ifndef PNG_DEPSTRUCT
-# define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
-#endif
-#ifndef PNG_PRIVATE
-# define PNG_PRIVATE /* This is a private libpng function */
-#endif
-#ifndef PNG_FP_EXPORT /* A floating point API. */
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-# define PNG_FP_EXPORT(ordinal, type, name, args)\
- PNG_EXPORT(ordinal, type, name, args)
-# else /* No floating point APIs */
-# define PNG_FP_EXPORT(ordinal, type, name, args)
-# endif
-#endif
-#ifndef PNG_FIXED_EXPORT /* A fixed point API. */
-# ifdef PNG_FIXED_POINT_SUPPORTED
-# define PNG_FIXED_EXPORT(ordinal, type, name, args)\
- PNG_EXPORT(ordinal, type, name, args)
-# else /* No fixed point APIs */
-# define PNG_FIXED_EXPORT(ordinal, type, name, args)
-# endif
-#endif
-
-/* The following uses const char * instead of char * for error
- * and warning message functions, so some compilers won't complain.
- * If you do not want to use const, define PNG_NO_CONST here.
- *
- * This should not change how the APIs are called, so it can be done
- * on a per-file basis in the application.
- */
-#ifndef PNG_CONST
-# ifndef PNG_NO_CONST
-# define PNG_CONST const
-# else
-# define PNG_CONST
-# endif
-#endif
-
-/* Some typedefs to get us started. These should be safe on most of the
- * common platforms. The typedefs should be at least as large as the
- * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
- * don't have to be exactly that size. Some compilers dislike passing
- * unsigned shorts as function parameters, so you may be better off using
- * unsigned int for png_uint_16.
- */
-
-#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)
-typedef unsigned int png_uint_32;
-typedef int png_int_32;
-#else
-typedef unsigned long png_uint_32;
-typedef long png_int_32;
-#endif
-typedef unsigned short png_uint_16;
-typedef short png_int_16;
-typedef unsigned char png_byte;
-
-#ifdef PNG_NO_SIZE_T
-typedef unsigned int png_size_t;
-#else
-typedef size_t png_size_t;
-#endif
-#define png_sizeof(x) (sizeof (x))
-
-/* The following is needed for medium model support. It cannot be in the
- * pngpriv.h header. Needs modification for other compilers besides
- * MSC. Model independent support declares all arrays and pointers to be
- * large using the far keyword. The zlib version used must also support
- * model independent data. As of version zlib 1.0.4, the necessary changes
- * have been made in zlib. The USE_FAR_KEYWORD define triggers other
- * changes that are needed. (Tim Wegner)
- */
-
-/* Separate compiler dependencies (problem here is that zlib.h always
- * defines FAR. (SJT)
- */
-#ifdef __BORLANDC__
-# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
-# define LDATA 1
-# else
-# define LDATA 0
-# endif
- /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
-# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
-# define PNG_MAX_MALLOC_64K /* only used in build */
-# if (LDATA != 1)
-# ifndef FAR
-# define FAR __far
-# endif
-# define USE_FAR_KEYWORD
-# endif /* LDATA != 1 */
- /* Possibly useful for moving data out of default segment.
- * Uncomment it if you want. Could also define FARDATA as
- * const if your compiler supports it. (SJT)
-# define FARDATA FAR
- */
-# endif /* __WIN32__, __FLAT__, __CYGWIN__ */
-#endif /* __BORLANDC__ */
-
-
-/* Suggest testing for specific compiler first before testing for
- * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
- * making reliance oncertain keywords suspect. (SJT)
- */
-
-/* MSC Medium model */
-#ifdef FAR
-# ifdef M_I86MM
-# define USE_FAR_KEYWORD
-# define FARDATA FAR
-# include <dos.h>
-# endif
-#endif
-
-/* SJT: default case */
-#ifndef FAR
-# define FAR
-#endif
-
-/* At this point FAR is always defined */
-#ifndef FARDATA
-# define FARDATA
-#endif
-
-/* Typedef for floating-point numbers that are converted
- * to fixed-point with a multiple of 100,000, e.g., gamma
- */
-typedef png_int_32 png_fixed_point;
-
-/* Add typedefs for pointers */
-typedef void FAR * png_voidp;
-typedef PNG_CONST void FAR * png_const_voidp;
-typedef png_byte FAR * png_bytep;
-typedef PNG_CONST png_byte FAR * png_const_bytep;
-typedef png_uint_32 FAR * png_uint_32p;
-typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p;
-typedef png_int_32 FAR * png_int_32p;
-typedef PNG_CONST png_int_32 FAR * png_const_int_32p;
-typedef png_uint_16 FAR * png_uint_16p;
-typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p;
-typedef png_int_16 FAR * png_int_16p;
-typedef PNG_CONST png_int_16 FAR * png_const_int_16p;
-typedef char FAR * png_charp;
-typedef PNG_CONST char FAR * png_const_charp;
-typedef png_fixed_point FAR * png_fixed_point_p;
-typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p;
-typedef png_size_t FAR * png_size_tp;
-typedef PNG_CONST png_size_t FAR * png_const_size_tp;
-
-#ifdef PNG_STDIO_SUPPORTED
-typedef FILE * png_FILE_p;
-#endif
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-typedef double FAR * png_doublep;
-typedef PNG_CONST double FAR * png_const_doublep;
-#endif
-
-/* Pointers to pointers; i.e. arrays */
-typedef png_byte FAR * FAR * png_bytepp;
-typedef png_uint_32 FAR * FAR * png_uint_32pp;
-typedef png_int_32 FAR * FAR * png_int_32pp;
-typedef png_uint_16 FAR * FAR * png_uint_16pp;
-typedef png_int_16 FAR * FAR * png_int_16pp;
-typedef PNG_CONST char FAR * FAR * png_const_charpp;
-typedef char FAR * FAR * png_charpp;
-typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-typedef double FAR * FAR * png_doublepp;
-#endif
-
-/* Pointers to pointers to pointers; i.e., pointer to array */
-typedef char FAR * FAR * FAR * png_charppp;
-
-/* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
- * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32
- * to png_alloc_size_t are not necessary; in fact, it is recommended
- * not to use them at all so that the compiler can complain when something
- * turns out to be problematic.
- * Casts in the other direction (from png_alloc_size_t to png_size_t or
- * png_uint_32) should be explicitly applied; however, we do not expect
- * to encounter practical situations that require such conversions.
- */
-#if defined(__TURBOC__) && !defined(__FLAT__)
- typedef unsigned long png_alloc_size_t;
-#else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
- typedef unsigned long png_alloc_size_t;
-# else
- /* This is an attempt to detect an old Windows system where (int) is
- * actually 16 bits, in that case png_malloc must have an argument with a
- * bigger size to accomodate the requirements of the library.
- */
-# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \
- (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)
- typedef DWORD png_alloc_size_t;
-# else
- typedef png_size_t png_alloc_size_t;
-# endif
-# endif
-#endif
-
-#endif /* PNGCONF_H */
+++ /dev/null
-
-/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
- *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * Last changed in libpng 1.5.0 [January 6, 2011]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-/* Define PNG_DEBUG at compile time for debugging information. Higher
- * numbers for PNG_DEBUG mean more debugging information. This has
- * only been added since version 0.95 so it is not implemented throughout
- * libpng yet, but more support will be added as needed.
- *
- * png_debug[1-2]?(level, message ,arg{0-2})
- * Expands to a statement (either a simple expression or a compound
- * do..while(0) statement) that outputs a message with parameter
- * substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG
- * is undefined, 0 or 1 every png_debug expands to a simple expression
- * (actually ((void)0)).
- *
- * level: level of detail of message, starting at 0. A level 'n'
- * message is preceded by 'n' tab characters (not implemented
- * on Microsoft compilers unless PNG_DEBUG_FILE is also
- * defined, to allow debug DLL compilation with no standard IO).
- * message: a printf(3) style text string. A trailing '\n' is added
- * to the message.
- * arg: 0 to 2 arguments for printf(3) style substitution in message.
- */
-#ifndef PNGDEBUG_H
-#define PNGDEBUG_H
-/* These settings control the formatting of messages in png.c and pngerror.c */
-/* Moved to pngdebug.h at 1.5.0 */
-# ifndef PNG_LITERAL_SHARP
-# define PNG_LITERAL_SHARP 0x23
-# endif
-# ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
-# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
-# endif
-# ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
-# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
-# endif
-# ifndef PNG_STRING_NEWLINE
-# define PNG_STRING_NEWLINE "\n"
-# endif
-
-#ifdef PNG_DEBUG
-# if (PNG_DEBUG > 0)
-# if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
-# include <crtdbg.h>
-# if (PNG_DEBUG > 1)
-# ifndef _DEBUG
-# define _DEBUG
-# endif
-# ifndef png_debug
-# define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
-# endif
-# ifndef png_debug1
-# define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
-# endif
-# ifndef png_debug2
-# define png_debug2(l,m,p1,p2) \
- _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
-# endif
-# endif
-# else /* PNG_DEBUG_FILE || !_MSC_VER */
-# ifndef PNG_STDIO_SUPPORTED
-# include <stdio.h> /* not included yet */
-# endif
-# ifndef PNG_DEBUG_FILE
-# define PNG_DEBUG_FILE stderr
-# endif /* PNG_DEBUG_FILE */
-
-# if (PNG_DEBUG > 1)
-/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
- * non-ISO compilers
- */
-# ifdef __STDC__
-# ifndef png_debug
-# define png_debug(l,m) \
- do { \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
- } while (0)
-# endif
-# ifndef png_debug1
-# define png_debug1(l,m,p1) \
- do { \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
- } while (0)
-# endif
-# ifndef png_debug2
-# define png_debug2(l,m,p1,p2) \
- do { \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
- } while (0)
-# endif
-# else /* __STDC __ */
-# ifndef png_debug
-# define png_debug(l,m) \
- do { \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format); \
- } while (0)
-# endif
-# ifndef png_debug1
-# define png_debug1(l,m,p1) \
- do { \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format,p1); \
- } while (0)
-# endif
-# ifndef png_debug2
-# define png_debug2(l,m,p1,p2) \
- do { \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format,p1,p2); \
- } while (0)
-# endif
-# endif /* __STDC __ */
-# endif /* (PNG_DEBUG > 1) */
-
-# endif /* _MSC_VER */
-# endif /* (PNG_DEBUG > 0) */
-#endif /* PNG_DEBUG */
-#ifndef png_debug
-# define png_debug(l, m) ((void)0)
-#endif
-#ifndef png_debug1
-# define png_debug1(l, m, p1) ((void)0)
-#endif
-#ifndef png_debug2
-# define png_debug2(l, m, p1, p2) ((void)0)
-#endif
-#endif /* PNGDEBUG_H */
+++ /dev/null
-
-/* pngerror.c - stub functions for i/o and memory allocation
- *
- * Last changed in libpng 1.5.1 [February 3, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * This file provides a location for all error handling. Users who
- * need special error handling are expected to write replacement functions
- * and use png_set_error_fn() to use those functions. See the instructions
- * at each function.
- */
-
-#include "pngpriv.h"
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-
-static PNG_FUNCTION(void, png_default_error,PNGARG((png_structp png_ptr,
- png_const_charp error_message)),PNG_NORETURN);
-
-#ifdef PNG_WARNINGS_SUPPORTED
-static void /* PRIVATE */
-png_default_warning PNGARG((png_structp png_ptr,
- png_const_charp warning_message));
-#endif /* PNG_WARNINGS_SUPPORTED */
-
-/* This function is called whenever there is a fatal error. This function
- * should not be changed. If there is a need to handle errors differently,
- * you should supply a replacement error function and use png_set_error_fn()
- * to replace the error function at run-time.
- */
-#ifdef PNG_ERROR_TEXT_SUPPORTED
-PNG_FUNCTION(void,PNGAPI
-png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN)
-{
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- char msg[16];
- if (png_ptr != NULL)
- {
- if (png_ptr->flags&
- (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
- {
- if (*error_message == PNG_LITERAL_SHARP)
- {
- /* Strip "#nnnn " from beginning of error message. */
- int offset;
- for (offset = 1; offset<15; offset++)
- if (error_message[offset] == ' ')
- break;
-
- if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
- {
- int i;
- for (i = 0; i < offset - 1; i++)
- msg[i] = error_message[i + 1];
- msg[i - 1] = '\0';
- error_message = msg;
- }
-
- else
- error_message += offset;
- }
-
- else
- {
- if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
- {
- msg[0] = '0';
- msg[1] = '\0';
- error_message = msg;
- }
- }
- }
- }
-#endif
- if (png_ptr != NULL && png_ptr->error_fn != NULL)
- (*(png_ptr->error_fn))(png_ptr, error_message);
-
- /* If the custom handler doesn't exist, or if it returns,
- use the default handler, which will not return. */
- png_default_error(png_ptr, error_message);
-}
-#else
-PNG_FUNCTION(void,PNGAPI
-png_err,(png_structp png_ptr),PNG_NORETURN)
-{
- if (png_ptr != NULL && png_ptr->error_fn != NULL)
- (*(png_ptr->error_fn))(png_ptr, '\0');
-
- /* If the custom handler doesn't exist, or if it returns,
- use the default handler, which will not return. */
- png_default_error(png_ptr, '\0');
-}
-#endif /* PNG_ERROR_TEXT_SUPPORTED */
-
-#ifdef PNG_WARNINGS_SUPPORTED
-/* This function is called whenever there is a non-fatal error. This function
- * should not be changed. If there is a need to handle warnings differently,
- * you should supply a replacement warning function and use
- * png_set_error_fn() to replace the warning function at run-time.
- */
-void PNGAPI
-png_warning(png_structp png_ptr, png_const_charp warning_message)
-{
- int offset = 0;
- if (png_ptr != NULL)
- {
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- if (png_ptr->flags&
- (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
-#endif
- {
- if (*warning_message == PNG_LITERAL_SHARP)
- {
- for (offset = 1; offset < 15; offset++)
- if (warning_message[offset] == ' ')
- break;
- }
- }
- }
- if (png_ptr != NULL && png_ptr->warning_fn != NULL)
- (*(png_ptr->warning_fn))(png_ptr, warning_message + offset);
- else
- png_default_warning(png_ptr, warning_message + offset);
-}
-#endif /* PNG_WARNINGS_SUPPORTED */
-
-#ifdef PNG_BENIGN_ERRORS_SUPPORTED
-void PNGAPI
-png_benign_error(png_structp png_ptr, png_const_charp error_message)
-{
- if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
- png_warning(png_ptr, error_message);
- else
- png_error(png_ptr, error_message);
-}
-#endif
-
-/* These utilities are used internally to build an error message that relates
- * to the current chunk. The chunk name comes from png_ptr->chunk_name,
- * this is used to prefix the message. The message is limited in length
- * to 63 bytes, the name characters are output as hex digits wrapped in []
- * if the character is invalid.
- */
-#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
-static PNG_CONST char png_digit[16] = {
- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
- 'A', 'B', 'C', 'D', 'E', 'F'
-};
-
-#define PNG_MAX_ERROR_TEXT 64
-#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
-static void /* PRIVATE */
-png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
- error_message)
-{
- int iout = 0, iin = 0;
-
- while (iin < 4)
- {
- int c = png_ptr->chunk_name[iin++];
- if (isnonalpha(c))
- {
- buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET;
- buffer[iout++] = png_digit[(c & 0xf0) >> 4];
- buffer[iout++] = png_digit[c & 0x0f];
- buffer[iout++] = PNG_LITERAL_RIGHT_SQUARE_BRACKET;
- }
-
- else
- {
- buffer[iout++] = (png_byte)c;
- }
- }
-
- if (error_message == NULL)
- buffer[iout] = '\0';
-
- else
- {
- buffer[iout++] = ':';
- buffer[iout++] = ' ';
- png_memcpy(buffer + iout, error_message, PNG_MAX_ERROR_TEXT);
- buffer[iout + PNG_MAX_ERROR_TEXT - 1] = '\0';
- }
-}
-#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */
-
-#if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
-PNG_FUNCTION(void,PNGAPI
-png_chunk_error,(png_structp png_ptr, png_const_charp error_message),
- PNG_NORETURN)
-{
- char msg[18+PNG_MAX_ERROR_TEXT];
- if (png_ptr == NULL)
- png_error(png_ptr, error_message);
-
- else
- {
- png_format_buffer(png_ptr, msg, error_message);
- png_error(png_ptr, msg);
- }
-}
-#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */
-
-#ifdef PNG_WARNINGS_SUPPORTED
-void PNGAPI
-png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
-{
- char msg[18+PNG_MAX_ERROR_TEXT];
- if (png_ptr == NULL)
- png_warning(png_ptr, warning_message);
-
- else
- {
- png_format_buffer(png_ptr, msg, warning_message);
- png_warning(png_ptr, msg);
- }
-}
-#endif /* PNG_WARNINGS_SUPPORTED */
-
-#ifdef PNG_READ_SUPPORTED
-#ifdef PNG_BENIGN_ERRORS_SUPPORTED
-void PNGAPI
-png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message)
-{
- if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
- png_chunk_warning(png_ptr, error_message);
-
- else
- png_chunk_error(png_ptr, error_message);
-}
-#endif
-#endif /* PNG_READ_SUPPORTED */
-
-#ifdef PNG_ERROR_TEXT_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_FUNCTION(void,
-png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN)
-{
-# define fixed_message "fixed point overflow in "
-# define fixed_message_ln ((sizeof fixed_message)-1)
- int iin;
- char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT];
- png_memcpy(msg, fixed_message, fixed_message_ln);
- iin = 0;
- if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0)
- {
- msg[fixed_message_ln + iin] = name[iin];
- ++iin;
- }
- msg[fixed_message_ln + iin] = 0;
- png_error(png_ptr, msg);
-}
-#endif
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
-/* This API only exists if ANSI-C style error handling is used,
- * otherwise it is necessary for png_default_error to be overridden.
- */
-jmp_buf* PNGAPI
-png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn,
- size_t jmp_buf_size)
-{
- if (png_ptr == NULL || jmp_buf_size != png_sizeof(jmp_buf))
- return NULL;
-
- png_ptr->longjmp_fn = longjmp_fn;
- return &png_ptr->png_jmpbuf;
-}
-#endif
-
-/* This is the default error handling function. Note that replacements for
- * this function MUST NOT RETURN, or the program will likely crash. This
- * function is used by default, or if the program supplies NULL for the
- * error function pointer in png_set_error_fn().
- */
-static PNG_FUNCTION(void /* PRIVATE */,
-png_default_error,(png_structp png_ptr, png_const_charp error_message),
- PNG_NORETURN)
-{
-#ifdef PNG_CONSOLE_IO_SUPPORTED
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- if (*error_message == PNG_LITERAL_SHARP)
- {
- /* Strip "#nnnn " from beginning of error message. */
- int offset;
- char error_number[16];
- for (offset = 0; offset<15; offset++)
- {
- error_number[offset] = error_message[offset + 1];
- if (error_message[offset] == ' ')
- break;
- }
-
- if ((offset > 1) && (offset < 15))
- {
- error_number[offset - 1] = '\0';
- fprintf(stderr, "libpng error no. %s: %s",
- error_number, error_message + offset + 1);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
-
- else
- {
- fprintf(stderr, "libpng error: %s, offset=%d",
- error_message, offset);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
- }
- else
-#endif
- {
- fprintf(stderr, "libpng error: %s", error_message);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
-#endif
-#ifndef PNG_CONSOLE_IO_SUPPORTED
- PNG_UNUSED(error_message) /* Make compiler happy */
-#endif
- png_longjmp(png_ptr, 1);
-}
-
-PNG_FUNCTION(void,PNGAPI
-png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN)
-{
-#ifdef PNG_SETJMP_SUPPORTED
- if (png_ptr && png_ptr->longjmp_fn)
- {
-# ifdef USE_FAR_KEYWORD
- {
- jmp_buf png_jmpbuf;
- png_memcpy(png_jmpbuf, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
- png_ptr->longjmp_fn(png_jmpbuf, val);
- }
-
-# else
- png_ptr->longjmp_fn(png_ptr->png_jmpbuf, val);
-# endif
- }
-#endif
- /* Here if not setjmp support or if png_ptr is null. */
- PNG_ABORT();
-}
-
-#ifdef PNG_WARNINGS_SUPPORTED
-/* This function is called when there is a warning, but the library thinks
- * it can continue anyway. Replacement functions don't have to do anything
- * here if you don't want them to. In the default configuration, png_ptr is
- * not used, but it is passed in case it may be useful.
- */
-static void /* PRIVATE */
-png_default_warning(png_structp png_ptr, png_const_charp warning_message)
-{
-#ifdef PNG_CONSOLE_IO_SUPPORTED
-# ifdef PNG_ERROR_NUMBERS_SUPPORTED
- if (*warning_message == PNG_LITERAL_SHARP)
- {
- int offset;
- char warning_number[16];
- for (offset = 0; offset < 15; offset++)
- {
- warning_number[offset] = warning_message[offset + 1];
- if (warning_message[offset] == ' ')
- break;
- }
-
- if ((offset > 1) && (offset < 15))
- {
- warning_number[offset + 1] = '\0';
- fprintf(stderr, "libpng warning no. %s: %s",
- warning_number, warning_message + offset);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
-
- else
- {
- fprintf(stderr, "libpng warning: %s",
- warning_message);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
- }
- else
-# endif
-
- {
- fprintf(stderr, "libpng warning: %s", warning_message);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
-#else
- PNG_UNUSED(warning_message) /* Make compiler happy */
-#endif
- PNG_UNUSED(png_ptr) /* Make compiler happy */
-}
-#endif /* PNG_WARNINGS_SUPPORTED */
-
-/* This function is called when the application wants to use another method
- * of handling errors and warnings. Note that the error function MUST NOT
- * return to the calling routine or serious problems will occur. The return
- * method used in the default routine calls longjmp(png_ptr->png_jmpbuf, 1)
- */
-void PNGAPI
-png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warning_fn)
-{
- if (png_ptr == NULL)
- return;
-
- png_ptr->error_ptr = error_ptr;
- png_ptr->error_fn = error_fn;
- png_ptr->warning_fn = warning_fn;
-}
-
-
-/* This function returns a pointer to the error_ptr associated with the user
- * functions. The application should free any memory associated with this
- * pointer before png_write_destroy and png_read_destroy are called.
- */
-png_voidp PNGAPI
-png_get_error_ptr(png_const_structp png_ptr)
-{
- if (png_ptr == NULL)
- return NULL;
-
- return ((png_voidp)png_ptr->error_ptr);
-}
-
-
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
-void PNGAPI
-png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
-{
- if (png_ptr != NULL)
- {
- png_ptr->flags &=
- ((~(PNG_FLAG_STRIP_ERROR_NUMBERS |
- PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
- }
-}
-#endif
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+++ /dev/null
-
-/* pngget.c - retrieval of values from info struct
- *
- * Last changed in libpng 1.5.1 [February 3, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- */
-
-#include "pngpriv.h"
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-
-png_uint_32 PNGAPI
-png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr,
- png_uint_32 flag)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->valid & flag);
-
- return(0);
-}
-
-png_size_t PNGAPI
-png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->rowbytes);
-
- return(0);
-}
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
-png_bytepp PNGAPI
-png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->row_pointers);
-
- return(0);
-}
-#endif
-
-#ifdef PNG_EASY_ACCESS_SUPPORTED
-/* Easy access to info, added in libpng-0.99 */
-png_uint_32 PNGAPI
-png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->width;
-
- return (0);
-}
-
-png_uint_32 PNGAPI
-png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->height;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->bit_depth;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->color_type;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->filter_type;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->interlace_type;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->compression_type;
-
- return (0);
-}
-
-png_uint_32 PNGAPI
-png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
-{
-#ifdef PNG_pHYs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
- {
- png_debug1(1, "in %s retrieval function",
- "png_get_x_pixels_per_meter");
-
- if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
- return (info_ptr->x_pixels_per_unit);
- }
-#endif
-
- return (0);
-}
-
-png_uint_32 PNGAPI
-png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
-{
-#ifdef PNG_pHYs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
- {
- png_debug1(1, "in %s retrieval function",
- "png_get_y_pixels_per_meter");
-
- if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
- return (info_ptr->y_pixels_per_unit);
- }
-#endif
-
- return (0);
-}
-
-png_uint_32 PNGAPI
-png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
-{
-#ifdef PNG_pHYs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
- {
- png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
-
- if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER &&
- info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
- return (info_ptr->x_pixels_per_unit);
- }
-#endif
-
- return (0);
-}
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-float PNGAPI
-png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr)
-{
-#ifdef PNG_READ_pHYs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
- {
- png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
-
- if (info_ptr->x_pixels_per_unit != 0)
- return ((float)((float)info_ptr->y_pixels_per_unit
- /(float)info_ptr->x_pixels_per_unit));
- }
-#endif
-
- return ((float)0.0);
-}
-#endif
-
-#ifdef PNG_FIXED_POINT_SUPPORTED
-png_fixed_point PNGAPI
-png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr,
- png_const_infop info_ptr)
-{
-#ifdef PNG_READ_pHYs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)
- && info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0
- && info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX
- && info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX)
- {
- png_fixed_point res;
-
- png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio_fixed");
-
- /* The following casts work because a PNG 4 byte integer only has a valid
- * range of 0..2^31-1; otherwise the cast might overflow.
- */
- if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1,
- (png_int_32)info_ptr->x_pixels_per_unit))
- return res;
- }
-#endif
-
- return 0;
-}
-#endif
-
-png_int_32 PNGAPI
-png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
-{
-#ifdef PNG_oFFs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
- {
- png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
-
- if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
- return (info_ptr->x_offset);
- }
-#endif
-
- return (0);
-}
-
-png_int_32 PNGAPI
-png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
-{
-#ifdef PNG_oFFs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
- {
- png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
-
- if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
- return (info_ptr->y_offset);
- }
-#endif
-
- return (0);
-}
-
-png_int_32 PNGAPI
-png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
-{
-#ifdef PNG_oFFs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
- {
- png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels");
-
- if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
- return (info_ptr->x_offset);
- }
-#endif
-
- return (0);
-}
-
-png_int_32 PNGAPI
-png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
-{
-#ifdef PNG_oFFs_SUPPORTED
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
- {
- png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels");
-
- if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
- return (info_ptr->y_offset);
- }
-#endif
-
- return (0);
-}
-
-#ifdef PNG_INCH_CONVERSIONS_SUPPORTED
-static png_uint_32
-ppi_from_ppm(png_uint_32 ppm)
-{
-#if 0
- /* The conversion is *(2.54/100), in binary (32 digits):
- * .00000110100000001001110101001001
- */
- png_uint_32 t1001, t1101;
- ppm >>= 1; /* .1 */
- t1001 = ppm + (ppm >> 3); /* .1001 */
- t1101 = t1001 + (ppm >> 1); /* .1101 */
- ppm >>= 20; /* .000000000000000000001 */
- t1101 += t1101 >> 15; /* .1101000000000001101 */
- t1001 >>= 11; /* .000000000001001 */
- t1001 += t1001 >> 12; /* .000000000001001000000001001 */
- ppm += t1001; /* .000000000001001000001001001 */
- ppm += t1101; /* .110100000001001110101001001 */
- return (ppm + 16) >> 5;/* .00000110100000001001110101001001 */
-#else
- /* The argument is a PNG unsigned integer, so it is not permitted
- * to be bigger than 2^31.
- */
- png_fixed_point result;
- if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127,
- 5000))
- return result;
-
- /* Overflow. */
- return 0;
-#endif
-}
-
-png_uint_32 PNGAPI
-png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr));
-}
-
-png_uint_32 PNGAPI
-png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr));
-}
-
-png_uint_32 PNGAPI
-png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr));
-}
-
-#ifdef PNG_FIXED_POINT_SUPPORTED
-static png_fixed_point
-png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns)
-{
- /* Convert from metres * 1,000,000 to inches * 100,000, meters to
- * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127.
- * Notice that this can overflow - a warning is output and 0 is
- * returned.
- */
- return png_muldiv_warn(png_ptr, microns, 500, 127);
-}
-
-png_fixed_point PNGAPI
-png_get_x_offset_inches_fixed(png_structp png_ptr,
- png_const_infop info_ptr)
-{
- return png_fixed_inches_from_microns(png_ptr,
- png_get_x_offset_microns(png_ptr, info_ptr));
-}
-#endif
-
-#ifdef PNG_FIXED_POINT_SUPPORTED
-png_fixed_point PNGAPI
-png_get_y_offset_inches_fixed(png_structp png_ptr,
- png_const_infop info_ptr)
-{
- return png_fixed_inches_from_microns(png_ptr,
- png_get_y_offset_microns(png_ptr, info_ptr));
-}
-#endif
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-float PNGAPI
-png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- /* To avoid the overflow do the conversion directly in floating
- * point.
- */
- return (float)(png_get_x_offset_microns(png_ptr, info_ptr) * .00003937);
-}
-#endif
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-float PNGAPI
-png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- /* To avoid the overflow do the conversion directly in floating
- * point.
- */
- return (float)(png_get_y_offset_microns(png_ptr, info_ptr) * .00003937);
-}
-#endif
-
-#ifdef PNG_pHYs_SUPPORTED
-png_uint_32 PNGAPI
-png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr,
- png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
-{
- png_uint_32 retval = 0;
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
- {
- png_debug1(1, "in %s retrieval function", "pHYs");
-
- if (res_x != NULL)
- {
- *res_x = info_ptr->x_pixels_per_unit;
- retval |= PNG_INFO_pHYs;
- }
-
- if (res_y != NULL)
- {
- *res_y = info_ptr->y_pixels_per_unit;
- retval |= PNG_INFO_pHYs;
- }
-
- if (unit_type != NULL)
- {
- *unit_type = (int)info_ptr->phys_unit_type;
- retval |= PNG_INFO_pHYs;
-
- if (*unit_type == 1)
- {
- if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
- if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
- }
- }
- }
-
- return (retval);
-}
-#endif /* PNG_pHYs_SUPPORTED */
-#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */
-
-/* png_get_channels really belongs in here, too, but it's been around longer */
-
-#endif /* PNG_EASY_ACCESS_SUPPORTED */
-
-png_byte PNGAPI
-png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->channels);
-
- return (0);
-}
-
-png_const_bytep PNGAPI
-png_get_signature(png_const_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->signature);
-
- return (NULL);
-}
-
-#ifdef PNG_bKGD_SUPPORTED
-png_uint_32 PNGAPI
-png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr,
- png_color_16p *background)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
- && background != NULL)
- {
- png_debug1(1, "in %s retrieval function", "bKGD");
-
- *background = &(info_ptr->background);
- return (PNG_INFO_bKGD);
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_cHRM_SUPPORTED
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr,
- double *white_x, double *white_y, double *red_x, double *red_y,
- double *green_x, double *green_y, double *blue_x, double *blue_y)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
- {
- png_debug1(1, "in %s retrieval function", "cHRM");
-
- if (white_x != NULL)
- *white_x = png_float(png_ptr, info_ptr->x_white, "cHRM white X");
- if (white_y != NULL)
- *white_y = png_float(png_ptr, info_ptr->y_white, "cHRM white Y");
- if (red_x != NULL)
- *red_x = png_float(png_ptr, info_ptr->x_red, "cHRM red X");
- if (red_y != NULL)
- *red_y = png_float(png_ptr, info_ptr->y_red, "cHRM red Y");
- if (green_x != NULL)
- *green_x = png_float(png_ptr, info_ptr->x_green, "cHRM green X");
- if (green_y != NULL)
- *green_y = png_float(png_ptr, info_ptr->y_green, "cHRM green Y");
- if (blue_x != NULL)
- *blue_x = png_float(png_ptr, info_ptr->x_blue, "cHRM blue X");
- if (blue_y != NULL)
- *blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y");
- return (PNG_INFO_cHRM);
- }
-
- return (0);
-}
-# endif
-
-# ifdef PNG_FIXED_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr,
- png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
- png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
- png_fixed_point *blue_x, png_fixed_point *blue_y)
-{
- png_debug1(1, "in %s retrieval function", "cHRM");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
- {
- if (white_x != NULL)
- *white_x = info_ptr->x_white;
- if (white_y != NULL)
- *white_y = info_ptr->y_white;
- if (red_x != NULL)
- *red_x = info_ptr->x_red;
- if (red_y != NULL)
- *red_y = info_ptr->y_red;
- if (green_x != NULL)
- *green_x = info_ptr->x_green;
- if (green_y != NULL)
- *green_y = info_ptr->y_green;
- if (blue_x != NULL)
- *blue_x = info_ptr->x_blue;
- if (blue_y != NULL)
- *blue_y = info_ptr->y_blue;
- return (PNG_INFO_cHRM);
- }
-
- return (0);
-}
-# endif
-#endif
-
-#ifdef PNG_gAMA_SUPPORTED
-png_uint_32 PNGFAPI
-png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr,
- png_fixed_point *file_gamma)
-{
- png_debug1(1, "in %s retrieval function", "gAMA");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
- && file_gamma != NULL)
- {
- *file_gamma = info_ptr->gamma;
- return (PNG_INFO_gAMA);
- }
-
- return (0);
-}
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr,
- double *file_gamma)
-{
- png_fixed_point igamma;
- png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma);
-
- if (ok)
- *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA");
-
- return ok;
-}
-
-# endif
-#endif
-
-#ifdef PNG_sRGB_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr,
- int *file_srgb_intent)
-{
- png_debug1(1, "in %s retrieval function", "sRGB");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
- && file_srgb_intent != NULL)
- {
- *file_srgb_intent = (int)info_ptr->srgb_intent;
- return (PNG_INFO_sRGB);
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_iCCP_SUPPORTED
-png_uint_32 PNGAPI
-png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr,
- png_charpp name, int *compression_type,
- png_bytepp profile, png_uint_32 *proflen)
-{
- png_debug1(1, "in %s retrieval function", "iCCP");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
- && name != NULL && profile != NULL && proflen != NULL)
- {
- *name = info_ptr->iccp_name;
- *profile = info_ptr->iccp_profile;
- /* Compression_type is a dummy so the API won't have to change
- * if we introduce multiple compression types later.
- */
- *proflen = (int)info_ptr->iccp_proflen;
- *compression_type = (int)info_ptr->iccp_compression;
- return (PNG_INFO_iCCP);
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr,
- png_sPLT_tpp spalettes)
-{
- if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
- {
- *spalettes = info_ptr->splt_palettes;
- return ((png_uint_32)info_ptr->splt_palettes_num);
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
-png_uint_32 PNGAPI
-png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr,
- png_uint_16p *hist)
-{
- png_debug1(1, "in %s retrieval function", "hIST");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
- && hist != NULL)
- {
- *hist = info_ptr->hist;
- return (PNG_INFO_hIST);
- }
-
- return (0);
-}
-#endif
-
-png_uint_32 PNGAPI
-png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *width, png_uint_32 *height, int *bit_depth,
- int *color_type, int *interlace_type, int *compression_type,
- int *filter_type)
-
-{
- png_debug1(1, "in %s retrieval function", "IHDR");
-
- if (png_ptr == NULL || info_ptr == NULL || width == NULL ||
- height == NULL || bit_depth == NULL || color_type == NULL)
- return (0);
-
- *width = info_ptr->width;
- *height = info_ptr->height;
- *bit_depth = info_ptr->bit_depth;
- *color_type = info_ptr->color_type;
-
- if (compression_type != NULL)
- *compression_type = info_ptr->compression_type;
-
- if (filter_type != NULL)
- *filter_type = info_ptr->filter_type;
-
- if (interlace_type != NULL)
- *interlace_type = info_ptr->interlace_type;
-
- /* This is redundant if we can be sure that the info_ptr values were all
- * assigned in png_set_IHDR(). We do the check anyhow in case an
- * application has ignored our advice not to mess with the members
- * of info_ptr directly.
- */
- png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
- info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
- info_ptr->compression_type, info_ptr->filter_type);
-
- return (1);
-}
-
-#ifdef PNG_oFFs_SUPPORTED
-png_uint_32 PNGAPI
-png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr,
- png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
-{
- png_debug1(1, "in %s retrieval function", "oFFs");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
- && offset_x != NULL && offset_y != NULL && unit_type != NULL)
- {
- *offset_x = info_ptr->x_offset;
- *offset_y = info_ptr->y_offset;
- *unit_type = (int)info_ptr->offset_unit_type;
- return (PNG_INFO_oFFs);
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
-png_uint_32 PNGAPI
-png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr,
- png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
- png_charp *units, png_charpp *params)
-{
- png_debug1(1, "in %s retrieval function", "pCAL");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
- && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
- nparams != NULL && units != NULL && params != NULL)
- {
- *purpose = info_ptr->pcal_purpose;
- *X0 = info_ptr->pcal_X0;
- *X1 = info_ptr->pcal_X1;
- *type = (int)info_ptr->pcal_type;
- *nparams = (int)info_ptr->pcal_nparams;
- *units = info_ptr->pcal_units;
- *params = info_ptr->pcal_params;
- return (PNG_INFO_pCAL);
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_sCAL_SUPPORTED
-# ifdef PNG_FIXED_POINT_SUPPORTED
-# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr,
- int *unit, png_fixed_point *width, png_fixed_point *height)
-{
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
- {
- *unit = info_ptr->scal_unit;
- /*TODO: make this work without FP support */
- *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width");
- *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height),
- "sCAL height");
- return (PNG_INFO_sCAL);
- }
-
- return(0);
-}
-# endif /* FLOATING_ARITHMETIC */
-# endif /* FIXED_POINT */
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr,
- int *unit, double *width, double *height)
-{
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
- {
- *unit = info_ptr->scal_unit;
- *width = atof(info_ptr->scal_s_width);
- *height = atof(info_ptr->scal_s_height);
- return (PNG_INFO_sCAL);
- }
-
- return(0);
-}
-# endif /* FLOATING POINT */
-png_uint_32 PNGAPI
-png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr,
- int *unit, png_charpp width, png_charpp height)
-{
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
- {
- *unit = info_ptr->scal_unit;
- *width = info_ptr->scal_s_width;
- *height = info_ptr->scal_s_height;
- return (PNG_INFO_sCAL);
- }
-
- return(0);
-}
-#endif /* sCAL */
-
-#ifdef PNG_pHYs_SUPPORTED
-png_uint_32 PNGAPI
-png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr,
- png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
-{
- png_uint_32 retval = 0;
-
- png_debug1(1, "in %s retrieval function", "pHYs");
-
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_pHYs))
- {
- if (res_x != NULL)
- {
- *res_x = info_ptr->x_pixels_per_unit;
- retval |= PNG_INFO_pHYs;
- }
-
- if (res_y != NULL)
- {
- *res_y = info_ptr->y_pixels_per_unit;
- retval |= PNG_INFO_pHYs;
- }
-
- if (unit_type != NULL)
- {
- *unit_type = (int)info_ptr->phys_unit_type;
- retval |= PNG_INFO_pHYs;
- }
- }
-
- return (retval);
-}
-#endif /* pHYs */
-
-png_uint_32 PNGAPI
-png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr,
- png_colorp *palette, int *num_palette)
-{
- png_debug1(1, "in %s retrieval function", "PLTE");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
- && palette != NULL)
- {
- *palette = info_ptr->palette;
- *num_palette = info_ptr->num_palette;
- png_debug1(3, "num_palette = %d", *num_palette);
- return (PNG_INFO_PLTE);
- }
-
- return (0);
-}
-
-#ifdef PNG_sBIT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr,
- png_color_8p *sig_bit)
-{
- png_debug1(1, "in %s retrieval function", "sBIT");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
- && sig_bit != NULL)
- {
- *sig_bit = &(info_ptr->sig_bit);
- return (PNG_INFO_sBIT);
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_text(png_const_structp png_ptr, png_const_infop info_ptr,
- png_textp *text_ptr, int *num_text)
-{
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
- {
- png_debug1(1, "in %s retrieval function",
- (png_ptr->chunk_name[0] == '\0' ? "text" :
- (png_const_charp)png_ptr->chunk_name));
-
- if (text_ptr != NULL)
- *text_ptr = info_ptr->text;
-
- if (num_text != NULL)
- *num_text = info_ptr->num_text;
-
- return ((png_uint_32)info_ptr->num_text);
- }
-
- if (num_text != NULL)
- *num_text = 0;
-
- return(0);
-}
-#endif
-
-#ifdef PNG_tIME_SUPPORTED
-png_uint_32 PNGAPI
-png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
-{
- png_debug1(1, "in %s retrieval function", "tIME");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
- && mod_time != NULL)
- {
- *mod_time = &(info_ptr->mod_time);
- return (PNG_INFO_tIME);
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_tRNS_SUPPORTED
-png_uint_32 PNGAPI
-png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr,
- png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
-{
- png_uint_32 retval = 0;
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
- {
- png_debug1(1, "in %s retrieval function", "tRNS");
-
- if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (trans_alpha != NULL)
- {
- *trans_alpha = info_ptr->trans_alpha;
- retval |= PNG_INFO_tRNS;
- }
-
- if (trans_color != NULL)
- *trans_color = &(info_ptr->trans_color);
- }
-
- else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
- {
- if (trans_color != NULL)
- {
- *trans_color = &(info_ptr->trans_color);
- retval |= PNG_INFO_tRNS;
- }
-
- if (trans_alpha != NULL)
- *trans_alpha = NULL;
- }
-
- if (num_trans != NULL)
- {
- *num_trans = info_ptr->num_trans;
- retval |= PNG_INFO_tRNS;
- }
- }
-
- return (retval);
-}
-#endif
-
-#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
-int PNGAPI
-png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr,
- png_unknown_chunkpp unknowns)
-{
- if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
- {
- *unknowns = info_ptr->unknown_chunks;
- return info_ptr->unknown_chunks_num;
- }
-
- return (0);
-}
-#endif
-
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-png_byte PNGAPI
-png_get_rgb_to_gray_status (png_const_structp png_ptr)
-{
- return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0);
-}
-#endif
-
-#ifdef PNG_USER_CHUNKS_SUPPORTED
-png_voidp PNGAPI
-png_get_user_chunk_ptr(png_const_structp png_ptr)
-{
- return (png_ptr ? png_ptr->user_chunk_ptr : NULL);
-}
-#endif
-
-png_size_t PNGAPI
-png_get_compression_buffer_size(png_const_structp png_ptr)
-{
- return (png_ptr ? png_ptr->zbuf_size : 0L);
-}
-
-
-#ifdef PNG_SET_USER_LIMITS_SUPPORTED
-/* These functions were added to libpng 1.2.6 and were enabled
- * by default in libpng-1.4.0 */
-png_uint_32 PNGAPI
-png_get_user_width_max (png_const_structp png_ptr)
-{
- return (png_ptr ? png_ptr->user_width_max : 0);
-}
-
-png_uint_32 PNGAPI
-png_get_user_height_max (png_const_structp png_ptr)
-{
- return (png_ptr ? png_ptr->user_height_max : 0);
-}
-
-/* This function was added to libpng 1.4.0 */
-png_uint_32 PNGAPI
-png_get_chunk_cache_max (png_const_structp png_ptr)
-{
- return (png_ptr ? png_ptr->user_chunk_cache_max : 0);
-}
-
-/* This function was added to libpng 1.4.1 */
-png_alloc_size_t PNGAPI
-png_get_chunk_malloc_max (png_const_structp png_ptr)
-{
- return (png_ptr ? png_ptr->user_chunk_malloc_max : 0);
-}
-#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
-
-/* These functions were added to libpng 1.4.0 */
-#ifdef PNG_IO_STATE_SUPPORTED
-png_uint_32 PNGAPI
-png_get_io_state (png_structp png_ptr)
-{
- return png_ptr->io_state;
-}
-
-png_uint_32 PNGAPI
-png_get_io_chunk_type (png_const_structp png_ptr)
-{
- return ((png_ptr->chunk_name[0] << 24) +
- (png_ptr->chunk_name[1] << 16) +
- (png_ptr->chunk_name[2] << 8) +
- (png_ptr->chunk_name[3]));
-}
-
-png_const_bytep PNGAPI
-png_get_io_chunk_name (png_structp png_ptr)
-{
- return png_ptr->chunk_name;
-}
-#endif /* ?PNG_IO_STATE_SUPPORTED */
-
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+++ /dev/null
-
-/* pnginfo.h - header file for PNG reference library
- *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * Last changed in libpng 1.5.0 [January 6, 2011]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
- /* png_info is a structure that holds the information in a PNG file so
- * that the application can find out the characteristics of the image.
- * If you are reading the file, this structure will tell you what is
- * in the PNG file. If you are writing the file, fill in the information
- * you want to put into the PNG file, using png_set_*() functions, then
- * call png_write_info().
- *
- * The names chosen should be very close to the PNG specification, so
- * consult that document for information about the meaning of each field.
- *
- * With libpng < 0.95, it was only possible to directly set and read the
- * the values in the png_info_struct, which meant that the contents and
- * order of the values had to remain fixed. With libpng 0.95 and later,
- * however, there are now functions that abstract the contents of
- * png_info_struct from the application, so this makes it easier to use
- * libpng with dynamic libraries, and even makes it possible to use
- * libraries that don't have all of the libpng ancillary chunk-handing
- * functionality. In libpng-1.5.0 this was moved into a separate private
- * file that is not visible to applications.
- *
- * The following members may have allocated storage attached that should be
- * cleaned up before the structure is discarded: palette, trans, text,
- * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile,
- * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these
- * are automatically freed when the info structure is deallocated, if they were
- * allocated internally by libpng. This behavior can be changed by means
- * of the png_data_freer() function.
- *
- * More allocation details: all the chunk-reading functions that
- * change these members go through the corresponding png_set_*
- * functions. A function to clear these members is available: see
- * png_free_data(). The png_set_* functions do not depend on being
- * able to point info structure members to any of the storage they are
- * passed (they make their own copies), EXCEPT that the png_set_text
- * functions use the same storage passed to them in the text_ptr or
- * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns
- * functions do not make their own copies.
- */
-#ifndef PNGINFO_H
-#define PNGINFO_H
-
-struct png_info_def
-{
- /* the following are necessary for every PNG file */
- png_uint_32 width; /* width of image in pixels (from IHDR) */
- png_uint_32 height; /* height of image in pixels (from IHDR) */
- png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */
- png_size_t rowbytes; /* bytes needed to hold an untransformed row */
- png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */
- png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */
- png_uint_16 num_trans; /* number of transparent palette color (tRNS) */
- png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */
- png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */
- /* The following three should have been named *_method not *_type */
- png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */
- png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */
- png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
-
- /* The following is informational only on read, and not used on writes. */
- png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */
- png_byte pixel_depth; /* number of bits per pixel */
- png_byte spare_byte; /* to align the data, and for future use */
- png_byte signature[8]; /* magic bytes read by libpng from start of file */
-
- /* The rest of the data is optional. If you are reading, check the
- * valid field to see if the information in these are valid. If you
- * are writing, set the valid field to those chunks you want written,
- * and initialize the appropriate fields below.
- */
-
-#if defined(PNG_gAMA_SUPPORTED)
- /* The gAMA chunk describes the gamma characteristics of the system
- * on which the image was created, normally in the range [1.0, 2.5].
- * Data is valid if (valid & PNG_INFO_gAMA) is non-zero.
- */
- png_fixed_point gamma;
-#endif
-
-#ifdef PNG_sRGB_SUPPORTED
- /* GR-P, 0.96a */
- /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */
- png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED
- /* The tEXt, and zTXt chunks contain human-readable textual data in
- * uncompressed, compressed, and optionally compressed forms, respectively.
- * The data in "text" is an array of pointers to uncompressed,
- * null-terminated C strings. Each chunk has a keyword that describes the
- * textual data contained in that chunk. Keywords are not required to be
- * unique, and the text string may be empty. Any number of text chunks may
- * be in an image.
- */
- int num_text; /* number of comments read or comments to write */
- int max_text; /* current size of text array */
- png_textp text; /* array of comments read or comments to write */
-#endif /* PNG_TEXT_SUPPORTED */
-
-#ifdef PNG_tIME_SUPPORTED
- /* The tIME chunk holds the last time the displayed image data was
- * modified. See the png_time struct for the contents of this struct.
- */
- png_time mod_time;
-#endif
-
-#ifdef PNG_sBIT_SUPPORTED
- /* The sBIT chunk specifies the number of significant high-order bits
- * in the pixel data. Values are in the range [1, bit_depth], and are
- * only specified for the channels in the pixel data. The contents of
- * the low-order bits is not specified. Data is valid if
- * (valid & PNG_INFO_sBIT) is non-zero.
- */
- png_color_8 sig_bit; /* significant bits in color channels */
-#endif
-
-#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
-defined(PNG_READ_BACKGROUND_SUPPORTED)
- /* The tRNS chunk supplies transparency data for paletted images and
- * other image types that don't need a full alpha channel. There are
- * "num_trans" transparency values for a paletted image, stored in the
- * same order as the palette colors, starting from index 0. Values
- * for the data are in the range [0, 255], ranging from fully transparent
- * to fully opaque, respectively. For non-paletted images, there is a
- * single color specified that should be treated as fully transparent.
- * Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
- */
- png_bytep trans; /* alpha values for paletted image */
- png_bytep trans_alpha; /* alpha values for paletted image */
- png_color_16 trans_color; /* transparent color for non-palette image */
-#endif
-
-#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- /* The bKGD chunk gives the suggested image background color if the
- * display program does not have its own background color and the image
- * is needs to composited onto a background before display. The colors
- * in "background" are normally in the same color space/depth as the
- * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero.
- */
- png_color_16 background;
-#endif
-
-#ifdef PNG_oFFs_SUPPORTED
- /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards
- * and downwards from the top-left corner of the display, page, or other
- * application-specific co-ordinate space. See the PNG_OFFSET_ defines
- * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero.
- */
- png_int_32 x_offset; /* x offset on page */
- png_int_32 y_offset; /* y offset on page */
- png_byte offset_unit_type; /* offset units type */
-#endif
-
-#ifdef PNG_pHYs_SUPPORTED
- /* The pHYs chunk gives the physical pixel density of the image for
- * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_
- * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero.
- */
- png_uint_32 x_pixels_per_unit; /* horizontal pixel density */
- png_uint_32 y_pixels_per_unit; /* vertical pixel density */
- png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
- /* The hIST chunk contains the relative frequency or importance of the
- * various palette entries, so that a viewer can intelligently select a
- * reduced-color palette, if required. Data is an array of "num_palette"
- * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST)
- * is non-zero.
- */
- png_uint_16p hist;
-#endif
-
-#ifdef PNG_cHRM_SUPPORTED
- /* The cHRM chunk describes the CIE color characteristics of the monitor
- * on which the PNG was created. This data allows the viewer to do gamut
- * mapping of the input image to ensure that the viewer sees the same
- * colors in the image as the creator. Values are in the range
- * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero.
- */
- png_fixed_point x_white;
- png_fixed_point y_white;
- png_fixed_point x_red;
- png_fixed_point y_red;
- png_fixed_point x_green;
- png_fixed_point y_green;
- png_fixed_point x_blue;
- png_fixed_point y_blue;
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
- /* The pCAL chunk describes a transformation between the stored pixel
- * values and original physical data values used to create the image.
- * The integer range [0, 2^bit_depth - 1] maps to the floating-point
- * range given by [pcal_X0, pcal_X1], and are further transformed by a
- * (possibly non-linear) transformation function given by "pcal_type"
- * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_
- * defines below, and the PNG-Group's PNG extensions document for a
- * complete description of the transformations and how they should be
- * implemented, and for a description of the ASCII parameter strings.
- * Data values are valid if (valid & PNG_INFO_pCAL) non-zero.
- */
- png_charp pcal_purpose; /* pCAL chunk description string */
- png_int_32 pcal_X0; /* minimum value */
- png_int_32 pcal_X1; /* maximum value */
- png_charp pcal_units; /* Latin-1 string giving physical units */
- png_charpp pcal_params; /* ASCII strings containing parameter values */
- png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */
- png_byte pcal_nparams; /* number of parameters given in pcal_params */
-#endif
-
-/* New members added in libpng-1.0.6 */
- png_uint_32 free_me; /* flags items libpng is responsible for freeing */
-
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
- defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
- /* Storage for unknown chunks that the library doesn't recognize. */
- png_unknown_chunkp unknown_chunks;
- int unknown_chunks_num;
-#endif
-
-#ifdef PNG_iCCP_SUPPORTED
- /* iCCP chunk data. */
- png_charp iccp_name; /* profile name */
- png_bytep iccp_profile; /* International Color Consortium profile data */
- png_uint_32 iccp_proflen; /* ICC profile data length */
- png_byte iccp_compression; /* Always zero */
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
- /* Data on sPLT chunks (there may be more than one). */
- png_sPLT_tp splt_palettes;
- png_uint_32 splt_palettes_num;
-#endif
-
-#ifdef PNG_sCAL_SUPPORTED
- /* The sCAL chunk describes the actual physical dimensions of the
- * subject matter of the graphic. The chunk contains a unit specification
- * a byte value, and two ASCII strings representing floating-point
- * values. The values are width and height corresponsing to one pixel
- * in the image. Data values are valid if (valid & PNG_INFO_sCAL) is
- * non-zero.
- */
- png_byte scal_unit; /* unit of physical scale */
- png_charp scal_s_width; /* string containing height */
- png_charp scal_s_height; /* string containing width */
-#endif
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
- /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS)
- non-zero */
- /* Data valid if (valid & PNG_INFO_IDAT) non-zero */
- png_bytepp row_pointers; /* the image bits */
-#endif
-
-};
-#endif /* PNGINFO_H */
+++ /dev/null
-
-/* libpng STANDARD API DEFINITION */
-
-/* pnglibconf.h - library build configuration */
-
-/* libpng version 1.5.0 - last changed on February 11, 2011 */
-
-/* Copyright (c) 1998-2011 Glenn Randers-Pehrson */
-
-/* This code is released under the libpng license. */
-/* For conditions of distribution and use, see the disclaimer */
-/* and license in png.h */
-
-/* pnglibconf.h */
-/* Derived from: scripts/pnglibconf.dfa */
-/* If you edit this file by hand you must obey the rules expressed in */
-/* pnglibconf.dfa with respect to the dependencies between the following */
-/* symbols. It is much better to generate a new file using */
-/* scripts/libpngconf.mak */
-
-#ifndef PNGLCONF_H
-#define PNGLCONF_H
-/* settings */
-#define PNG_API_RULE 0
-#define PNG_CALLOC_SUPPORTED
-#define PNG_COST_SHIFT 3
-#define PNG_DEFAULT_READ_MACROS 1
-#define PNG_GAMMA_THRESHOLD_FIXED 5000
-#define PNG_MAX_GAMMA_8 11
-#define PNG_QUANTIZE_BLUE_BITS 5
-#define PNG_QUANTIZE_GREEN_BITS 5
-#define PNG_QUANTIZE_RED_BITS 5
-#define PNG_sCAL_PRECISION 5
-#define PNG_USER_CHUNK_CACHE_MAX 0
-#define PNG_USER_CHUNK_MALLOC_MAX 0
-#define PNG_USER_HEIGHT_MAX 1000000L
-#define PNG_USER_WIDTH_MAX 1000000L
-#define PNG_WEIGHT_SHIFT 8
-#define PNG_ZBUF_SIZE 8192
-/* end of settings */
-/* options */
-#define PNG_16BIT_SUPPORTED
-#define PNG_ALIGN_MEMORY_SUPPORTED
-#define PNG_BENIGN_ERRORS_SUPPORTED
-#define PNG_bKGD_SUPPORTED
-#define PNG_CHECK_cHRM_SUPPORTED
-#define PNG_cHRM_SUPPORTED
-#define PNG_CONSOLE_IO_SUPPORTED
-#define PNG_CONVERT_tIME_SUPPORTED
-#define PNG_EASY_ACCESS_SUPPORTED
-#define PNG_ERROR_TEXT_SUPPORTED
-#define PNG_FIXED_POINT_SUPPORTED
-#define PNG_FLOATING_ARITHMETIC_SUPPORTED
-#define PNG_FLOATING_POINT_SUPPORTED
-#define PNG_gAMA_SUPPORTED
-#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-#define PNG_hIST_SUPPORTED
-#define PNG_iCCP_SUPPORTED
-#define PNG_INCH_CONVERSIONS_SUPPORTED
-#define PNG_INFO_IMAGE_SUPPORTED
-#define PNG_IO_STATE_SUPPORTED
-#define PNG_iTXt_SUPPORTED
-#define PNG_MNG_FEATURES_SUPPORTED
-#define PNG_oFFs_SUPPORTED
-#define PNG_pCAL_SUPPORTED
-#define PNG_pHYs_SUPPORTED
-#define PNG_POINTER_INDEXING_SUPPORTED
-#define PNG_PROGRESSIVE_READ_SUPPORTED
-#define PNG_READ_16BIT_SUPPORTED
-#define PNG_READ_16_TO_8_SUPPORTED
-#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
-#define PNG_READ_BACKGROUND_SUPPORTED
-#define PNG_READ_BGR_SUPPORTED
-#define PNG_READ_bKGD_SUPPORTED
-#define PNG_READ_cHRM_SUPPORTED
-#define PNG_READ_COMPOSITE_NODIV_SUPPORTED
-#define PNG_READ_EXPAND_16_SUPPORTED
-#define PNG_READ_EXPAND_SUPPORTED
-#define PNG_READ_FILLER_SUPPORTED
-#define PNG_READ_gAMA_SUPPORTED
-#define PNG_READ_GAMMA_SUPPORTED
-#define PNG_READ_GRAY_TO_RGB_SUPPORTED
-#define PNG_READ_hIST_SUPPORTED
-#define PNG_READ_iCCP_SUPPORTED
-#define PNG_READ_INTERLACING_SUPPORTED
-#define PNG_READ_INT_FUNCTIONS_SUPPORTED
-#define PNG_READ_INVERT_ALPHA_SUPPORTED
-#define PNG_READ_INVERT_SUPPORTED
-#define PNG_READ_iTXt_SUPPORTED
-#define PNG_READ_oFFs_SUPPORTED
-#define PNG_READ_OPT_PLTE_SUPPORTED
-#define PNG_READ_PACK_SUPPORTED
-#define PNG_READ_PACKSWAP_SUPPORTED
-#define PNG_READ_pCAL_SUPPORTED
-#define PNG_READ_pHYs_SUPPORTED
-#define PNG_READ_QUANTIZE_SUPPORTED
-#define PNG_READ_RGB_TO_GRAY_SUPPORTED
-#define PNG_READ_sBIT_SUPPORTED
-#define PNG_READ_sCAL_SUPPORTED
-#define PNG_READ_SHIFT_SUPPORTED
-#define PNG_READ_sPLT_SUPPORTED
-#define PNG_READ_sRGB_SUPPORTED
-#define PNG_READ_STRIP_ALPHA_SUPPORTED
-#define PNG_READ_SUPPORTED
-#define PNG_READ_SWAP_ALPHA_SUPPORTED
-#define PNG_READ_SWAP_SUPPORTED
-#define PNG_READ_tEXt_SUPPORTED
-#define PNG_READ_TEXT_SUPPORTED
-#define PNG_READ_tIME_SUPPORTED
-#define PNG_READ_TRANSFORMS_SUPPORTED
-#define PNG_READ_tRNS_SUPPORTED
-#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_READ_USER_CHUNKS_SUPPORTED
-#define PNG_READ_USER_TRANSFORM_SUPPORTED
-#define PNG_READ_zTXt_SUPPORTED
-#define PNG_SAVE_INT_32_SUPPORTED
-#define PNG_sBIT_SUPPORTED
-#define PNG_sCAL_SUPPORTED
-#define PNG_SEQUENTIAL_READ_SUPPORTED
-#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
-#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
-#define PNG_SETJMP_SUPPORTED
-#define PNG_SET_USER_LIMITS_SUPPORTED
-#define PNG_sPLT_SUPPORTED
-#define PNG_sRGB_SUPPORTED
-#define PNG_STDIO_SUPPORTED
-#define PNG_tEXt_SUPPORTED
-#define PNG_TEXT_SUPPORTED
-#define PNG_TIME_RFC1123_SUPPORTED
-#define PNG_tIME_SUPPORTED
-#define PNG_tRNS_SUPPORTED
-#define PNG_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_USER_CHUNKS_SUPPORTED
-#define PNG_USER_LIMITS_SUPPORTED
-#define PNG_USER_MEM_SUPPORTED
-#define PNG_USER_TRANSFORM_INFO_SUPPORTED
-#define PNG_USER_TRANSFORM_PTR_SUPPORTED
-#define PNG_WARNINGS_SUPPORTED
-#define PNG_WRITE_16BIT_SUPPORTED
-#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
-#define PNG_WRITE_BGR_SUPPORTED
-#define PNG_WRITE_bKGD_SUPPORTED
-#define PNG_WRITE_cHRM_SUPPORTED
-#define PNG_WRITE_FILLER_SUPPORTED
-#define PNG_WRITE_FILTER_SUPPORTED
-#define PNG_WRITE_FLUSH_SUPPORTED
-#define PNG_WRITE_gAMA_SUPPORTED
-#define PNG_WRITE_hIST_SUPPORTED
-#define PNG_WRITE_iCCP_SUPPORTED
-#define PNG_WRITE_INTERLACING_SUPPORTED
-#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
-#define PNG_WRITE_INVERT_ALPHA_SUPPORTED
-#define PNG_WRITE_INVERT_SUPPORTED
-#define PNG_WRITE_iTXt_SUPPORTED
-#define PNG_WRITE_oFFs_SUPPORTED
-#define PNG_WRITE_PACK_SUPPORTED
-#define PNG_WRITE_PACKSWAP_SUPPORTED
-#define PNG_WRITE_pCAL_SUPPORTED
-#define PNG_WRITE_pHYs_SUPPORTED
-#define PNG_WRITE_sBIT_SUPPORTED
-#define PNG_WRITE_sCAL_SUPPORTED
-#define PNG_WRITE_SHIFT_SUPPORTED
-#define PNG_WRITE_sPLT_SUPPORTED
-#define PNG_WRITE_sRGB_SUPPORTED
-#define PNG_WRITE_SUPPORTED
-#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
-#define PNG_WRITE_SWAP_SUPPORTED
-#define PNG_WRITE_tEXt_SUPPORTED
-#define PNG_WRITE_TEXT_SUPPORTED
-#define PNG_WRITE_tIME_SUPPORTED
-#define PNG_WRITE_TRANSFORMS_SUPPORTED
-#define PNG_WRITE_tRNS_SUPPORTED
-#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
-#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
-#define PNG_WRITE_zTXt_SUPPORTED
-#define PNG_zTXt_SUPPORTED
-/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/
-/*#undef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED*/
-/* end of options */
-#endif /* PNGLCONF_H */
+++ /dev/null
-
-/* pngmem.c - stub functions for memory allocation
- *
- * Last changed in libpng 1.5.1 [February 3, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * This file provides a location for all memory allocation. Users who
- * need special memory handling are expected to supply replacement
- * functions for png_malloc() and png_free(), and to use
- * png_create_read_struct_2() and png_create_write_struct_2() to
- * identify the replacement functions.
- */
-
-#include "pngpriv.h"
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-
-/* Borland DOS special memory handler */
-#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
-/* If you change this, be sure to change the one in png.h also */
-
-/* Allocate memory for a png_struct. The malloc and memset can be replaced
- by a single call to calloc() if this is thought to improve performance. */
-PNG_FUNCTION(png_voidp /* PRIVATE */,
-png_create_struct,(int type),PNG_ALLOCATED)
-{
-# ifdef PNG_USER_MEM_SUPPORTED
- return (png_create_struct_2(type, NULL, NULL));
-}
-
-/* Alternate version of png_create_struct, for use with user-defined malloc. */
-PNG_FUNCTION(png_voidp /* PRIVATE */,
-png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
- PNG_ALLOCATED)
-{
-# endif /* PNG_USER_MEM_SUPPORTED */
- png_size_t size;
- png_voidp struct_ptr;
-
- if (type == PNG_STRUCT_INFO)
- size = png_sizeof(png_info);
-
- else if (type == PNG_STRUCT_PNG)
- size = png_sizeof(png_struct);
-
- else
- return (png_get_copyright(NULL));
-
-# ifdef PNG_USER_MEM_SUPPORTED
- if (malloc_fn != NULL)
- {
- png_struct dummy_struct;
- png_structp png_ptr = &dummy_struct;
- png_ptr->mem_ptr=mem_ptr;
- struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
- }
-
- else
-# endif /* PNG_USER_MEM_SUPPORTED */
- struct_ptr = (png_voidp)farmalloc(size);
- if (struct_ptr != NULL)
- png_memset(struct_ptr, 0, size);
-
- return (struct_ptr);
-}
-
-/* Free memory allocated by a png_create_struct() call */
-void /* PRIVATE */
-png_destroy_struct(png_voidp struct_ptr)
-{
-# ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2(struct_ptr, NULL, NULL);
-}
-
-/* Free memory allocated by a png_create_struct() call */
-void /* PRIVATE */
-png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
- png_voidp mem_ptr)
-{
-# endif
- if (struct_ptr != NULL)
- {
-# ifdef PNG_USER_MEM_SUPPORTED
- if (free_fn != NULL)
- {
- png_struct dummy_struct;
- png_structp png_ptr = &dummy_struct;
- png_ptr->mem_ptr=mem_ptr;
- (*(free_fn))(png_ptr, struct_ptr);
- return;
- }
-
-# endif /* PNG_USER_MEM_SUPPORTED */
- farfree (struct_ptr);
- }
-}
-
-/* Allocate memory. For reasonable files, size should never exceed
- * 64K. However, zlib may allocate more then 64K if you don't tell
- * it not to. See zconf.h and png.h for more information. zlib does
- * need to allocate exactly 64K, so whatever you call here must
- * have the ability to do that.
- *
- * Borland seems to have a problem in DOS mode for exactly 64K.
- * It gives you a segment with an offset of 8 (perhaps to store its
- * memory stuff). zlib doesn't like this at all, so we have to
- * detect and deal with it. This code should not be needed in
- * Windows or OS/2 modes, and only in 16 bit mode. This code has
- * been updated by Alexander Lehmann for version 0.89 to waste less
- * memory.
- *
- * Note that we can't use png_size_t for the "size" declaration,
- * since on some systems a png_size_t is a 16-bit quantity, and as a
- * result, we would be truncating potentially larger memory requests
- * (which should cause a fatal error) and introducing major problems.
- */
-PNG_FUNCTION(png_voidp,PNGAPI
-png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
-{
- png_voidp ret;
-
- ret = (png_malloc(png_ptr, size));
-
- if (ret != NULL)
- png_memset(ret,0,(png_size_t)size);
-
- return (ret);
-}
-
-PNG_FUNCTION(png_voidp,PNGAPI
-png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
-{
- png_voidp ret;
-
- if (png_ptr == NULL || size == 0)
- return (NULL);
-
-# ifdef PNG_USER_MEM_SUPPORTED
- if (png_ptr->malloc_fn != NULL)
- ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
-
- else
- ret = (png_malloc_default(png_ptr, size));
-
- if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr, "Out of memory");
-
- return (ret);
-}
-
-PNG_FUNCTION(png_voidp,PNGAPI
-png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
-{
- png_voidp ret;
-# endif /* PNG_USER_MEM_SUPPORTED */
-
- if (png_ptr == NULL || size == 0)
- return (NULL);
-
-# ifdef PNG_MAX_MALLOC_64K
- if (size > (png_uint_32)65536L)
- {
- png_warning(png_ptr, "Cannot Allocate > 64K");
- ret = NULL;
- }
-
- else
-# endif
-
- if (size != (size_t)size)
- ret = NULL;
-
- else if (size == (png_uint_32)65536L)
- {
- if (png_ptr->offset_table == NULL)
- {
- /* Try to see if we need to do any of this fancy stuff */
- ret = farmalloc(size);
- if (ret == NULL || ((png_size_t)ret & 0xffff))
- {
- int num_blocks;
- png_uint_32 total_size;
- png_bytep table;
- int i;
- png_byte huge * hptr;
-
- if (ret != NULL)
- {
- farfree(ret);
- ret = NULL;
- }
-
- if (png_ptr->zlib_window_bits > 14)
- num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
-
- else
- num_blocks = 1;
-
- if (png_ptr->zlib_mem_level >= 7)
- num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7));
-
- else
- num_blocks++;
-
- total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16;
-
- table = farmalloc(total_size);
-
- if (table == NULL)
- {
-# ifndef PNG_USER_MEM_SUPPORTED
- if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */
-
- else
- png_warning(png_ptr, "Out Of Memory");
-# endif
- return (NULL);
- }
-
- if ((png_size_t)table & 0xfff0)
- {
-# ifndef PNG_USER_MEM_SUPPORTED
- if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr,
- "Farmalloc didn't return normalized pointer");
-
- else
- png_warning(png_ptr,
- "Farmalloc didn't return normalized pointer");
-# endif
- return (NULL);
- }
-
- png_ptr->offset_table = table;
- png_ptr->offset_table_ptr = farmalloc(num_blocks *
- png_sizeof(png_bytep));
-
- if (png_ptr->offset_table_ptr == NULL)
- {
-# ifndef PNG_USER_MEM_SUPPORTED
- if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */
-
- else
- png_warning(png_ptr, "Out Of memory");
-# endif
- return (NULL);
- }
-
- hptr = (png_byte huge *)table;
- if ((png_size_t)hptr & 0xf)
- {
- hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L);
- hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */
- }
-
- for (i = 0; i < num_blocks; i++)
- {
- png_ptr->offset_table_ptr[i] = (png_bytep)hptr;
- hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */
- }
-
- png_ptr->offset_table_number = num_blocks;
- png_ptr->offset_table_count = 0;
- png_ptr->offset_table_count_free = 0;
- }
- }
-
- if (png_ptr->offset_table_count >= png_ptr->offset_table_number)
- {
-# ifndef PNG_USER_MEM_SUPPORTED
- if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr, "Out of Memory"); /* Note "o" and "M" */
-
- else
- png_warning(png_ptr, "Out of Memory");
-# endif
- return (NULL);
- }
-
- ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++];
- }
-
- else
- ret = farmalloc(size);
-
-# ifndef PNG_USER_MEM_SUPPORTED
- if (ret == NULL)
- {
- if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */
-
- else
- png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */
- }
-# endif
-
- return (ret);
-}
-
-/* Free a pointer allocated by png_malloc(). In the default
- * configuration, png_ptr is not used, but is passed in case it
- * is needed. If ptr is NULL, return without taking any action.
- */
-void PNGAPI
-png_free(png_structp png_ptr, png_voidp ptr)
-{
- if (png_ptr == NULL || ptr == NULL)
- return;
-
-# ifdef PNG_USER_MEM_SUPPORTED
- if (png_ptr->free_fn != NULL)
- {
- (*(png_ptr->free_fn))(png_ptr, ptr);
- return;
- }
-
- else
- png_free_default(png_ptr, ptr);
-}
-
-void PNGAPI
-png_free_default(png_structp png_ptr, png_voidp ptr)
-{
-# endif /* PNG_USER_MEM_SUPPORTED */
-
- if (png_ptr == NULL || ptr == NULL)
- return;
-
- if (png_ptr->offset_table != NULL)
- {
- int i;
-
- for (i = 0; i < png_ptr->offset_table_count; i++)
- {
- if (ptr == png_ptr->offset_table_ptr[i])
- {
- ptr = NULL;
- png_ptr->offset_table_count_free++;
- break;
- }
- }
- if (png_ptr->offset_table_count_free == png_ptr->offset_table_count)
- {
- farfree(png_ptr->offset_table);
- farfree(png_ptr->offset_table_ptr);
- png_ptr->offset_table = NULL;
- png_ptr->offset_table_ptr = NULL;
- }
- }
-
- if (ptr != NULL)
- farfree(ptr);
-}
-
-#else /* Not the Borland DOS special memory handler */
-
-/* Allocate memory for a png_struct or a png_info. The malloc and
- memset can be replaced by a single call to calloc() if this is thought
- to improve performance noticably. */
-PNG_FUNCTION(png_voidp /* PRIVATE */,
-png_create_struct,(int type),PNG_ALLOCATED)
-{
-# ifdef PNG_USER_MEM_SUPPORTED
- return (png_create_struct_2(type, NULL, NULL));
-}
-
-/* Allocate memory for a png_struct or a png_info. The malloc and
- memset can be replaced by a single call to calloc() if this is thought
- to improve performance noticably. */
-PNG_FUNCTION(png_voidp /* PRIVATE */,
-png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
- PNG_ALLOCATED)
-{
-# endif /* PNG_USER_MEM_SUPPORTED */
- png_size_t size;
- png_voidp struct_ptr;
-
- if (type == PNG_STRUCT_INFO)
- size = png_sizeof(png_info);
-
- else if (type == PNG_STRUCT_PNG)
- size = png_sizeof(png_struct);
-
- else
- return (NULL);
-
-# ifdef PNG_USER_MEM_SUPPORTED
- if (malloc_fn != NULL)
- {
- png_struct dummy_struct;
- png_structp png_ptr = &dummy_struct;
- png_ptr->mem_ptr=mem_ptr;
- struct_ptr = (*(malloc_fn))(png_ptr, size);
-
- if (struct_ptr != NULL)
- png_memset(struct_ptr, 0, size);
-
- return (struct_ptr);
- }
-# endif /* PNG_USER_MEM_SUPPORTED */
-
-# if defined(__TURBOC__) && !defined(__FLAT__)
- struct_ptr = (png_voidp)farmalloc(size);
-# else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
- struct_ptr = (png_voidp)halloc(size, 1);
-# else
- struct_ptr = (png_voidp)malloc(size);
-# endif
-# endif
-
- if (struct_ptr != NULL)
- png_memset(struct_ptr, 0, size);
-
- return (struct_ptr);
-}
-
-
-/* Free memory allocated by a png_create_struct() call */
-void /* PRIVATE */
-png_destroy_struct(png_voidp struct_ptr)
-{
-# ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2(struct_ptr, NULL, NULL);
-}
-
-/* Free memory allocated by a png_create_struct() call */
-void /* PRIVATE */
-png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
- png_voidp mem_ptr)
-{
-# endif /* PNG_USER_MEM_SUPPORTED */
- if (struct_ptr != NULL)
- {
-# ifdef PNG_USER_MEM_SUPPORTED
- if (free_fn != NULL)
- {
- png_struct dummy_struct;
- png_structp png_ptr = &dummy_struct;
- png_ptr->mem_ptr=mem_ptr;
- (*(free_fn))(png_ptr, struct_ptr);
- return;
- }
-# endif /* PNG_USER_MEM_SUPPORTED */
-# if defined(__TURBOC__) && !defined(__FLAT__)
- farfree(struct_ptr);
-
-# else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
- hfree(struct_ptr);
-
-# else
- free(struct_ptr);
-
-# endif
-# endif
- }
-}
-
-/* Allocate memory. For reasonable files, size should never exceed
- * 64K. However, zlib may allocate more then 64K if you don't tell
- * it not to. See zconf.h and png.h for more information. zlib does
- * need to allocate exactly 64K, so whatever you call here must
- * have the ability to do that.
- */
-
-PNG_FUNCTION(png_voidp,PNGAPI
-png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
-{
- png_voidp ret;
-
- ret = (png_malloc(png_ptr, size));
-
- if (ret != NULL)
- png_memset(ret,0,(png_size_t)size);
-
- return (ret);
-}
-
-PNG_FUNCTION(png_voidp,PNGAPI
-png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
-{
- png_voidp ret;
-
-# ifdef PNG_USER_MEM_SUPPORTED
- if (png_ptr == NULL || size == 0)
- return (NULL);
-
- if (png_ptr->malloc_fn != NULL)
- ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
-
- else
- ret = (png_malloc_default(png_ptr, size));
-
- if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr, "Out of Memory");
-
- return (ret);
-}
-
-PNG_FUNCTION(png_voidp,PNGAPI
-png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
-{
- png_voidp ret;
-# endif /* PNG_USER_MEM_SUPPORTED */
-
- if (png_ptr == NULL || size == 0)
- return (NULL);
-
-# ifdef PNG_MAX_MALLOC_64K
- if (size > (png_uint_32)65536L)
- {
-# ifndef PNG_USER_MEM_SUPPORTED
- if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr, "Cannot Allocate > 64K");
-
- else
-# endif
- return NULL;
- }
-# endif
-
- /* Check for overflow */
-# if defined(__TURBOC__) && !defined(__FLAT__)
-
- if (size != (unsigned long)size)
- ret = NULL;
-
- else
- ret = farmalloc(size);
-
-# else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
- if (size != (unsigned long)size)
- ret = NULL;
-
- else
- ret = halloc(size, 1);
-
-# else
- if (size != (size_t)size)
- ret = NULL;
-
- else
- ret = malloc((size_t)size);
-# endif
-# endif
-
-# ifndef PNG_USER_MEM_SUPPORTED
- if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
- png_error(png_ptr, "Out of Memory");
-# endif
-
- return (ret);
-}
-
-/* Free a pointer allocated by png_malloc(). If ptr is NULL, return
- * without taking any action.
- */
-void PNGAPI
-png_free(png_structp png_ptr, png_voidp ptr)
-{
- if (png_ptr == NULL || ptr == NULL)
- return;
-
-# ifdef PNG_USER_MEM_SUPPORTED
- if (png_ptr->free_fn != NULL)
- {
- (*(png_ptr->free_fn))(png_ptr, ptr);
- return;
- }
-
- else
- png_free_default(png_ptr, ptr);
-}
-
-void PNGAPI
-png_free_default(png_structp png_ptr, png_voidp ptr)
-{
- if (png_ptr == NULL || ptr == NULL)
- return;
-
-# endif /* PNG_USER_MEM_SUPPORTED */
-
-# if defined(__TURBOC__) && !defined(__FLAT__)
- farfree(ptr);
-
-# else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
- hfree(ptr);
-
-# else
- free(ptr);
-
-# endif
-# endif
-}
-#endif /* Not Borland DOS special memory handler */
-
-/* This function was added at libpng version 1.2.3. The png_malloc_warn()
- * function will set up png_malloc() to issue a png_warning and return NULL
- * instead of issuing a png_error, if it fails to allocate the requested
- * memory.
- */
-PNG_FUNCTION(png_voidp,PNGAPI
-png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
-{
- png_voidp ptr;
- png_uint_32 save_flags;
- if (png_ptr == NULL)
- return (NULL);
-
- save_flags = png_ptr->flags;
- png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
- ptr = (png_voidp)png_malloc((png_structp)png_ptr, size);
- png_ptr->flags=save_flags;
- return(ptr);
-}
-
-
-#ifdef PNG_USER_MEM_SUPPORTED
-/* This function is called when the application wants to use another method
- * of allocating and freeing memory.
- */
-void PNGAPI
-png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
- malloc_fn, png_free_ptr free_fn)
-{
- if (png_ptr != NULL)
- {
- png_ptr->mem_ptr = mem_ptr;
- png_ptr->malloc_fn = malloc_fn;
- png_ptr->free_fn = free_fn;
- }
-}
-
-/* This function returns a pointer to the mem_ptr associated with the user
- * functions. The application should free any memory associated with this
- * pointer before png_write_destroy and png_read_destroy are called.
- */
-png_voidp PNGAPI
-png_get_mem_ptr(png_const_structp png_ptr)
-{
- if (png_ptr == NULL)
- return (NULL);
-
- return ((png_voidp)png_ptr->mem_ptr);
-}
-#endif /* PNG_USER_MEM_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+++ /dev/null
-
-/* pngpread.c - read a png file in push mode
- *
- * Last changed in libpng 1.5.2 [March 31, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-
-/* Push model modes */
-#define PNG_READ_SIG_MODE 0
-#define PNG_READ_CHUNK_MODE 1
-#define PNG_READ_IDAT_MODE 2
-#define PNG_SKIP_MODE 3
-#define PNG_READ_tEXt_MODE 4
-#define PNG_READ_zTXt_MODE 5
-#define PNG_READ_DONE_MODE 6
-#define PNG_READ_iTXt_MODE 7
-#define PNG_ERROR_MODE 8
-
-void PNGAPI
-png_process_data(png_structp png_ptr, png_infop info_ptr,
- png_bytep buffer, png_size_t buffer_size)
-{
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- png_push_restore_buffer(png_ptr, buffer, buffer_size);
-
- while (png_ptr->buffer_size)
- {
- png_process_some_data(png_ptr, info_ptr);
- }
-}
-
-png_size_t PNGAPI
-png_process_data_pause(png_structp png_ptr, int save)
-{
- if (png_ptr != NULL)
- {
- /* It's easiest for the caller if we do the save, then the caller doesn't
- * have to supply the same data again:
- */
- if (save)
- png_push_save_buffer(png_ptr);
- else
- {
- /* This includes any pending saved bytes: */
- png_size_t remaining = png_ptr->buffer_size;
- png_ptr->buffer_size = 0;
-
- /* So subtract the saved buffer size, unless all the data
- * is actually 'saved', in which case we just return 0
- */
- if (png_ptr->save_buffer_size < remaining)
- return remaining - png_ptr->save_buffer_size;
- }
- }
-
- return 0;
-}
-
-png_uint_32 PNGAPI
-png_process_data_skip(png_structp png_ptr)
-{
- png_uint_32 remaining = 0;
-
- if (png_ptr != NULL && png_ptr->process_mode == PNG_SKIP_MODE &&
- png_ptr->skip_length > 0)
- {
- /* At the end of png_process_data the buffer size must be 0 (see the loop
- * above) so we can detect a broken call here:
- */
- if (png_ptr->buffer_size != 0)
- png_error(png_ptr,
- "png_process_data_skip called inside png_process_data");
-
- /* If is impossible for there to be a saved buffer at this point -
- * otherwise we could not be in SKIP mode. This will also happen if
- * png_process_skip is called inside png_process_data (but only very
- * rarely.)
- */
- if (png_ptr->save_buffer_size != 0)
- png_error(png_ptr, "png_process_data_skip called with saved data");
-
- remaining = png_ptr->skip_length;
- png_ptr->skip_length = 0;
- png_ptr->process_mode = PNG_READ_CHUNK_MODE;
- }
-
- return remaining;
-}
-
-/* What we do with the incoming data depends on what we were previously
- * doing before we ran out of data...
- */
-void /* PRIVATE */
-png_process_some_data(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr == NULL)
- return;
-
- switch (png_ptr->process_mode)
- {
- case PNG_READ_SIG_MODE:
- {
- png_push_read_sig(png_ptr, info_ptr);
- break;
- }
-
- case PNG_READ_CHUNK_MODE:
- {
- png_push_read_chunk(png_ptr, info_ptr);
- break;
- }
-
- case PNG_READ_IDAT_MODE:
- {
- png_push_read_IDAT(png_ptr);
- break;
- }
-
-#ifdef PNG_READ_tEXt_SUPPORTED
- case PNG_READ_tEXt_MODE:
- {
- png_push_read_tEXt(png_ptr, info_ptr);
- break;
- }
-
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- case PNG_READ_zTXt_MODE:
- {
- png_push_read_zTXt(png_ptr, info_ptr);
- break;
- }
-
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- case PNG_READ_iTXt_MODE:
- {
- png_push_read_iTXt(png_ptr, info_ptr);
- break;
- }
-
-#endif
- case PNG_SKIP_MODE:
- {
- png_push_crc_finish(png_ptr);
- break;
- }
-
- default:
- {
- png_ptr->buffer_size = 0;
- break;
- }
- }
-}
-
-/* Read any remaining signature bytes from the stream and compare them with
- * the correct PNG signature. It is possible that this routine is called
- * with bytes already read from the signature, either because they have been
- * checked by the calling application, or because of multiple calls to this
- * routine.
- */
-void /* PRIVATE */
-png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
-{
- png_size_t num_checked = png_ptr->sig_bytes,
- num_to_check = 8 - num_checked;
-
- if (png_ptr->buffer_size < num_to_check)
- {
- num_to_check = png_ptr->buffer_size;
- }
-
- png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
- num_to_check);
- png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check);
-
- if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
- {
- if (num_checked < 4 &&
- png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
- png_error(png_ptr, "Not a PNG file");
-
- else
- png_error(png_ptr, "PNG file corrupted by ASCII conversion");
- }
- else
- {
- if (png_ptr->sig_bytes >= 8)
- {
- png_ptr->process_mode = PNG_READ_CHUNK_MODE;
- }
- }
-}
-
-void /* PRIVATE */
-png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
-{
- PNG_IHDR;
- PNG_IDAT;
- PNG_IEND;
- PNG_PLTE;
-#ifdef PNG_READ_bKGD_SUPPORTED
- PNG_bKGD;
-#endif
-#ifdef PNG_READ_cHRM_SUPPORTED
- PNG_cHRM;
-#endif
-#ifdef PNG_READ_gAMA_SUPPORTED
- PNG_gAMA;
-#endif
-#ifdef PNG_READ_hIST_SUPPORTED
- PNG_hIST;
-#endif
-#ifdef PNG_READ_iCCP_SUPPORTED
- PNG_iCCP;
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- PNG_iTXt;
-#endif
-#ifdef PNG_READ_oFFs_SUPPORTED
- PNG_oFFs;
-#endif
-#ifdef PNG_READ_pCAL_SUPPORTED
- PNG_pCAL;
-#endif
-#ifdef PNG_READ_pHYs_SUPPORTED
- PNG_pHYs;
-#endif
-#ifdef PNG_READ_sBIT_SUPPORTED
- PNG_sBIT;
-#endif
-#ifdef PNG_READ_sCAL_SUPPORTED
- PNG_sCAL;
-#endif
-#ifdef PNG_READ_sRGB_SUPPORTED
- PNG_sRGB;
-#endif
-#ifdef PNG_READ_sPLT_SUPPORTED
- PNG_sPLT;
-#endif
-#ifdef PNG_READ_tEXt_SUPPORTED
- PNG_tEXt;
-#endif
-#ifdef PNG_READ_tIME_SUPPORTED
- PNG_tIME;
-#endif
-#ifdef PNG_READ_tRNS_SUPPORTED
- PNG_tRNS;
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- PNG_zTXt;
-#endif
-
- /* First we make sure we have enough data for the 4 byte chunk name
- * and the 4 byte chunk length before proceeding with decoding the
- * chunk data. To fully decode each of these chunks, we also make
- * sure we have enough data in the buffer for the 4 byte CRC at the
- * end of every chunk (except IDAT, which is handled separately).
- */
- if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
- {
- png_byte chunk_length[4];
-
- if (png_ptr->buffer_size < 8)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_fill_buffer(png_ptr, chunk_length, 4);
- png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
- png_reset_crc(png_ptr);
- png_crc_read(png_ptr, png_ptr->chunk_name, 4);
- png_check_chunk_name(png_ptr, png_ptr->chunk_name);
- png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
- }
-
- if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- if (png_ptr->mode & PNG_AFTER_IDAT)
- png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
-
- if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
- {
- if (png_ptr->push_length != 13)
- png_error(png_ptr, "Invalid IHDR length");
-
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length);
- }
-
- else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_IEND(png_ptr, info_ptr, png_ptr->push_length);
-
- png_ptr->process_mode = PNG_READ_DONE_MODE;
- png_push_have_end(png_ptr, info_ptr);
- }
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- png_ptr->mode |= PNG_HAVE_IDAT;
-
- png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
-
- if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
- png_ptr->mode |= PNG_HAVE_PLTE;
-
- else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- {
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before IDAT");
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
- png_error(png_ptr, "Missing PLTE before IDAT");
- }
- }
-
-#endif
- else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
- png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
- }
-
- else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- {
- /* If we reach an IDAT chunk, this means we have read all of the
- * header chunks, and we can start reading the image (or if this
- * is called after the image has been read - we have an error).
- */
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before IDAT");
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
- png_error(png_ptr, "Missing PLTE before IDAT");
-
- if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- if (!(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
- if (png_ptr->push_length == 0)
- return;
-
- if (png_ptr->mode & PNG_AFTER_IDAT)
- png_benign_error(png_ptr, "Too many IDATs found");
- }
-
- png_ptr->idat_size = png_ptr->push_length;
- png_ptr->mode |= PNG_HAVE_IDAT;
- png_ptr->process_mode = PNG_READ_IDAT_MODE;
- png_push_have_info(png_ptr, info_ptr);
- png_ptr->zstream.avail_out =
- (uInt) PNG_ROWBYTES(png_ptr->pixel_depth,
- png_ptr->iwidth) + 1;
- png_ptr->zstream.next_out = png_ptr->row_buf;
- return;
- }
-
-#ifdef PNG_READ_gAMA_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_gAMA(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_sBIT_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_sBIT(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_cHRM_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_sRGB_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_sRGB(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_iCCP_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_iCCP(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_sPLT_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_sPLT(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_tRNS_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_tRNS(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_bKGD_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_hIST_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_hIST(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_pHYs_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_pHYs(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_oFFs_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length);
- }
-#endif
-
-#ifdef PNG_READ_pCAL_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_sCAL_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_sCAL(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_tIME_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_tIME(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_tEXt_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif
- else
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
- png_push_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
- }
-
- png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-}
-
-void /* PRIVATE */
-png_push_crc_skip(png_structp png_ptr, png_uint_32 skip)
-{
- png_ptr->process_mode = PNG_SKIP_MODE;
- png_ptr->skip_length = skip;
-}
-
-void /* PRIVATE */
-png_push_crc_finish(png_structp png_ptr)
-{
- if (png_ptr->skip_length && png_ptr->save_buffer_size)
- {
- png_size_t save_size = png_ptr->save_buffer_size;
- png_uint_32 skip_length = png_ptr->skip_length;
-
- /* We want the smaller of 'skip_length' and 'save_buffer_size', but
- * they are of different types and we don't know which variable has the
- * fewest bits. Carefully select the smaller and cast it to the type of
- * the larger - this cannot overflow. Do not cast in the following test
- * - it will break on either 16 or 64 bit platforms.
- */
- if (skip_length < save_size)
- save_size = (png_size_t)skip_length;
-
- else
- skip_length = (png_uint_32)save_size;
-
- png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
-
- png_ptr->skip_length -= skip_length;
- png_ptr->buffer_size -= save_size;
- png_ptr->save_buffer_size -= save_size;
- png_ptr->save_buffer_ptr += save_size;
- }
- if (png_ptr->skip_length && png_ptr->current_buffer_size)
- {
- png_size_t save_size = png_ptr->current_buffer_size;
- png_uint_32 skip_length = png_ptr->skip_length;
-
- /* We want the smaller of 'skip_length' and 'current_buffer_size', here,
- * the same problem exists as above and the same solution.
- */
- if (skip_length < save_size)
- save_size = (png_size_t)skip_length;
-
- else
- skip_length = (png_uint_32)save_size;
-
- png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
-
- png_ptr->skip_length -= skip_length;
- png_ptr->buffer_size -= save_size;
- png_ptr->current_buffer_size -= save_size;
- png_ptr->current_buffer_ptr += save_size;
- }
- if (!png_ptr->skip_length)
- {
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_crc_finish(png_ptr, 0);
- png_ptr->process_mode = PNG_READ_CHUNK_MODE;
- }
-}
-
-void PNGCBAPI
-png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
-{
- png_bytep ptr;
-
- if (png_ptr == NULL)
- return;
-
- ptr = buffer;
- if (png_ptr->save_buffer_size)
- {
- png_size_t save_size;
-
- if (length < png_ptr->save_buffer_size)
- save_size = length;
-
- else
- save_size = png_ptr->save_buffer_size;
-
- png_memcpy(ptr, png_ptr->save_buffer_ptr, save_size);
- length -= save_size;
- ptr += save_size;
- png_ptr->buffer_size -= save_size;
- png_ptr->save_buffer_size -= save_size;
- png_ptr->save_buffer_ptr += save_size;
- }
- if (length && png_ptr->current_buffer_size)
- {
- png_size_t save_size;
-
- if (length < png_ptr->current_buffer_size)
- save_size = length;
-
- else
- save_size = png_ptr->current_buffer_size;
-
- png_memcpy(ptr, png_ptr->current_buffer_ptr, save_size);
- png_ptr->buffer_size -= save_size;
- png_ptr->current_buffer_size -= save_size;
- png_ptr->current_buffer_ptr += save_size;
- }
-}
-
-void /* PRIVATE */
-png_push_save_buffer(png_structp png_ptr)
-{
- if (png_ptr->save_buffer_size)
- {
- if (png_ptr->save_buffer_ptr != png_ptr->save_buffer)
- {
- png_size_t i, istop;
- png_bytep sp;
- png_bytep dp;
-
- istop = png_ptr->save_buffer_size;
- for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer;
- i < istop; i++, sp++, dp++)
- {
- *dp = *sp;
- }
- }
- }
- if (png_ptr->save_buffer_size + png_ptr->current_buffer_size >
- png_ptr->save_buffer_max)
- {
- png_size_t new_max;
- png_bytep old_buffer;
-
- if (png_ptr->save_buffer_size > PNG_SIZE_MAX -
- (png_ptr->current_buffer_size + 256))
- {
- png_error(png_ptr, "Potential overflow of save_buffer");
- }
-
- new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
- old_buffer = png_ptr->save_buffer;
- png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr,
- (png_size_t)new_max);
-
- if (png_ptr->save_buffer == NULL)
- {
- png_free(png_ptr, old_buffer);
- png_error(png_ptr, "Insufficient memory for save_buffer");
- }
-
- png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
- png_free(png_ptr, old_buffer);
- png_ptr->save_buffer_max = new_max;
- }
- if (png_ptr->current_buffer_size)
- {
- png_memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size,
- png_ptr->current_buffer_ptr, png_ptr->current_buffer_size);
- png_ptr->save_buffer_size += png_ptr->current_buffer_size;
- png_ptr->current_buffer_size = 0;
- }
- png_ptr->save_buffer_ptr = png_ptr->save_buffer;
- png_ptr->buffer_size = 0;
-}
-
-void /* PRIVATE */
-png_push_restore_buffer(png_structp png_ptr, png_bytep buffer,
- png_size_t buffer_length)
-{
- png_ptr->current_buffer = buffer;
- png_ptr->current_buffer_size = buffer_length;
- png_ptr->buffer_size = buffer_length + png_ptr->save_buffer_size;
- png_ptr->current_buffer_ptr = png_ptr->current_buffer;
-}
-
-void /* PRIVATE */
-png_push_read_IDAT(png_structp png_ptr)
-{
- PNG_IDAT;
- if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
- {
- png_byte chunk_length[4];
-
- if (png_ptr->buffer_size < 8)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_fill_buffer(png_ptr, chunk_length, 4);
- png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
- png_reset_crc(png_ptr);
- png_crc_read(png_ptr, png_ptr->chunk_name, 4);
- png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
-
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- {
- png_ptr->process_mode = PNG_READ_CHUNK_MODE;
-
- if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
- png_error(png_ptr, "Not enough compressed data");
-
- return;
- }
-
- png_ptr->idat_size = png_ptr->push_length;
- }
- if (png_ptr->idat_size && png_ptr->save_buffer_size)
- {
- png_size_t save_size = png_ptr->save_buffer_size;
- png_uint_32 idat_size = png_ptr->idat_size;
-
- /* We want the smaller of 'idat_size' and 'current_buffer_size', but they
- * are of different types and we don't know which variable has the fewest
- * bits. Carefully select the smaller and cast it to the type of the
- * larger - this cannot overflow. Do not cast in the following test - it
- * will break on either 16 or 64 bit platforms.
- */
- if (idat_size < save_size)
- save_size = (png_size_t)idat_size;
-
- else
- idat_size = (png_uint_32)save_size;
-
- png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
-
- png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size);
-
- png_ptr->idat_size -= idat_size;
- png_ptr->buffer_size -= save_size;
- png_ptr->save_buffer_size -= save_size;
- png_ptr->save_buffer_ptr += save_size;
- }
-
- if (png_ptr->idat_size && png_ptr->current_buffer_size)
- {
- png_size_t save_size = png_ptr->current_buffer_size;
- png_uint_32 idat_size = png_ptr->idat_size;
-
- /* We want the smaller of 'idat_size' and 'current_buffer_size', but they
- * are of different types and we don't know which variable has the fewest
- * bits. Carefully select the smaller and cast it to the type of the
- * larger - this cannot overflow.
- */
- if (idat_size < save_size)
- save_size = (png_size_t)idat_size;
-
- else
- idat_size = (png_uint_32)save_size;
-
- png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
-
- png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size);
-
- png_ptr->idat_size -= idat_size;
- png_ptr->buffer_size -= save_size;
- png_ptr->current_buffer_size -= save_size;
- png_ptr->current_buffer_ptr += save_size;
- }
- if (!png_ptr->idat_size)
- {
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_crc_finish(png_ptr, 0);
- png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
- png_ptr->mode |= PNG_AFTER_IDAT;
- }
-}
-
-void /* PRIVATE */
-png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
- png_size_t buffer_length)
-{
- /* The caller checks for a non-zero buffer length. */
- if (!(buffer_length > 0) || buffer == NULL)
- png_error(png_ptr, "No IDAT data (internal error)");
-
- /* This routine must process all the data it has been given
- * before returning, calling the row callback as required to
- * handle the uncompressed results.
- */
- png_ptr->zstream.next_in = buffer;
- png_ptr->zstream.avail_in = (uInt)buffer_length;
-
- /* Keep going until the decompressed data is all processed
- * or the stream marked as finished.
- */
- while (png_ptr->zstream.avail_in > 0 &&
- !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
- {
- int ret;
-
- /* We have data for zlib, but we must check that zlib
- * has someplace to put the results. It doesn't matter
- * if we don't expect any results -- it may be the input
- * data is just the LZ end code.
- */
- if (!(png_ptr->zstream.avail_out > 0))
- {
- png_ptr->zstream.avail_out =
- (uInt) PNG_ROWBYTES(png_ptr->pixel_depth,
- png_ptr->iwidth) + 1;
-
- png_ptr->zstream.next_out = png_ptr->row_buf;
- }
-
- /* Using Z_SYNC_FLUSH here means that an unterminated
- * LZ stream (a stream with a missing end code) can still
- * be handled, otherwise (Z_NO_FLUSH) a future zlib
- * implementation might defer output and therefore
- * change the current behavior (see comments in inflate.c
- * for why this doesn't happen at present with zlib 1.2.5).
- */
- ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH);
-
- /* Check for any failure before proceeding. */
- if (ret != Z_OK && ret != Z_STREAM_END)
- {
- /* Terminate the decompression. */
- png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
-
- /* This may be a truncated stream (missing or
- * damaged end code). Treat that as a warning.
- */
- if (png_ptr->row_number >= png_ptr->num_rows ||
- png_ptr->pass > 6)
- png_warning(png_ptr, "Truncated compressed data in IDAT");
-
- else
- png_error(png_ptr, "Decompression error in IDAT");
-
- /* Skip the check on unprocessed input */
- return;
- }
-
- /* Did inflate output any data? */
- if (png_ptr->zstream.next_out != png_ptr->row_buf)
- {
- /* Is this unexpected data after the last row?
- * If it is, artificially terminate the LZ output
- * here.
- */
- if (png_ptr->row_number >= png_ptr->num_rows ||
- png_ptr->pass > 6)
- {
- /* Extra data. */
- png_warning(png_ptr, "Extra compressed data in IDAT");
- png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
-
- /* Do no more processing; skip the unprocessed
- * input check below.
- */
- return;
- }
-
- /* Do we have a complete row? */
- if (png_ptr->zstream.avail_out == 0)
- png_push_process_row(png_ptr);
- }
-
- /* And check for the end of the stream. */
- if (ret == Z_STREAM_END)
- png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
- }
-
- /* All the data should have been processed, if anything
- * is left at this point we have bytes of IDAT data
- * after the zlib end code.
- */
- if (png_ptr->zstream.avail_in > 0)
- png_warning(png_ptr, "Extra compression data in IDAT");
-}
-
-void /* PRIVATE */
-png_push_process_row(png_structp png_ptr)
-{
- png_ptr->row_info.color_type = png_ptr->color_type;
- png_ptr->row_info.width = png_ptr->iwidth;
- png_ptr->row_info.channels = png_ptr->channels;
- png_ptr->row_info.bit_depth = png_ptr->bit_depth;
- png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
-
- png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
-
- png_read_filter_row(png_ptr, &(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->prev_row + 1,
- (int)(png_ptr->row_buf[0]));
-
- png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
-
- if (png_ptr->transformations)
- png_do_read_transformations(png_ptr);
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- /* Blow up interlaced rows to full size */
- if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
- {
- if (png_ptr->pass < 6)
-/* old interface (pre-1.0.9):
- png_do_read_interlace(&(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
- */
- png_do_read_interlace(png_ptr);
-
- switch (png_ptr->pass)
- {
- case 0:
- {
- int i;
- for (i = 0; i < 8 && png_ptr->pass == 0; i++)
- {
- png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr); /* Updates png_ptr->pass */
- }
-
- if (png_ptr->pass == 2) /* Pass 1 might be empty */
- {
- for (i = 0; i < 4 && png_ptr->pass == 2; i++)
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
- }
-
- if (png_ptr->pass == 4 && png_ptr->height <= 4)
- {
- for (i = 0; i < 2 && png_ptr->pass == 4; i++)
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
- }
-
- if (png_ptr->pass == 6 && png_ptr->height <= 4)
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
-
- break;
- }
-
- case 1:
- {
- int i;
- for (i = 0; i < 8 && png_ptr->pass == 1; i++)
- {
- png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr);
- }
-
- if (png_ptr->pass == 2) /* Skip top 4 generated rows */
- {
- for (i = 0; i < 4 && png_ptr->pass == 2; i++)
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
- }
-
- break;
- }
-
- case 2:
- {
- int i;
-
- for (i = 0; i < 4 && png_ptr->pass == 2; i++)
- {
- png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr);
- }
-
- for (i = 0; i < 4 && png_ptr->pass == 2; i++)
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
-
- if (png_ptr->pass == 4) /* Pass 3 might be empty */
- {
- for (i = 0; i < 2 && png_ptr->pass == 4; i++)
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
- }
-
- break;
- }
-
- case 3:
- {
- int i;
-
- for (i = 0; i < 4 && png_ptr->pass == 3; i++)
- {
- png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr);
- }
-
- if (png_ptr->pass == 4) /* Skip top two generated rows */
- {
- for (i = 0; i < 2 && png_ptr->pass == 4; i++)
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
- }
-
- break;
- }
-
- case 4:
- {
- int i;
-
- for (i = 0; i < 2 && png_ptr->pass == 4; i++)
- {
- png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr);
- }
-
- for (i = 0; i < 2 && png_ptr->pass == 4; i++)
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
-
- if (png_ptr->pass == 6) /* Pass 5 might be empty */
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
-
- break;
- }
-
- case 5:
- {
- int i;
-
- for (i = 0; i < 2 && png_ptr->pass == 5; i++)
- {
- png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr);
- }
-
- if (png_ptr->pass == 6) /* Skip top generated row */
- {
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
-
- break;
- }
-
- default:
- case 6:
- {
- png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr);
-
- if (png_ptr->pass != 6)
- break;
-
- png_push_have_row(png_ptr, NULL);
- png_read_push_finish_row(png_ptr);
- }
- }
- }
- else
-#endif
- {
- png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr);
- }
-}
-
-void /* PRIVATE */
-png_read_push_finish_row(png_structp png_ptr)
-{
- /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-
- /* Start of interlace block */
- PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-
- /* Offset to next interlace block */
- PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-
- /* Start of interlace block in the y direction */
- PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
-
- /* Offset to next interlace block in the y direction */
- PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
-
- /* Height of interlace block. This is not currently used - if you need
- * it, uncomment it here and in png.h
- PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
- */
-
- png_ptr->row_number++;
- if (png_ptr->row_number < png_ptr->num_rows)
- return;
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- if (png_ptr->interlaced)
- {
- png_ptr->row_number = 0;
- png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
-
- do
- {
- png_ptr->pass++;
- if ((png_ptr->pass == 1 && png_ptr->width < 5) ||
- (png_ptr->pass == 3 && png_ptr->width < 3) ||
- (png_ptr->pass == 5 && png_ptr->width < 2))
- png_ptr->pass++;
-
- if (png_ptr->pass > 7)
- png_ptr->pass--;
-
- if (png_ptr->pass >= 7)
- break;
-
- png_ptr->iwidth = (png_ptr->width +
- png_pass_inc[png_ptr->pass] - 1 -
- png_pass_start[png_ptr->pass]) /
- png_pass_inc[png_ptr->pass];
-
- if (png_ptr->transformations & PNG_INTERLACE)
- break;
-
- png_ptr->num_rows = (png_ptr->height +
- png_pass_yinc[png_ptr->pass] - 1 -
- png_pass_ystart[png_ptr->pass]) /
- png_pass_yinc[png_ptr->pass];
-
- } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
- }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
-}
-
-#ifdef PNG_READ_tEXt_SUPPORTED
-void /* PRIVATE */
-png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
-{
- if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
- {
- PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
- png_error(png_ptr, "Out of place tEXt");
- /*NOT REACHED*/
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- png_ptr->skip_length = 0; /* This may not be necessary */
-
- if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
- {
- png_warning(png_ptr, "tEXt chunk too large to fit in memory");
- png_ptr->skip_length = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
-
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
- png_ptr->current_text[length] = '\0';
- png_ptr->current_text_ptr = png_ptr->current_text;
- png_ptr->current_text_size = (png_size_t)length;
- png_ptr->current_text_left = (png_size_t)length;
- png_ptr->process_mode = PNG_READ_tEXt_MODE;
-}
-
-void /* PRIVATE */
-png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr->buffer_size && png_ptr->current_text_left)
- {
- png_size_t text_size;
-
- if (png_ptr->buffer_size < png_ptr->current_text_left)
- text_size = png_ptr->buffer_size;
-
- else
- text_size = png_ptr->current_text_left;
-
- png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
- png_ptr->current_text_left -= text_size;
- png_ptr->current_text_ptr += text_size;
- }
- if (!(png_ptr->current_text_left))
- {
- png_textp text_ptr;
- png_charp text;
- png_charp key;
- int ret;
-
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_crc_finish(png_ptr);
-
-#ifdef PNG_MAX_MALLOC_64K
- if (png_ptr->skip_length)
- return;
-#endif
-
- key = png_ptr->current_text;
-
- for (text = key; *text; text++)
- /* Empty loop */ ;
-
- if (text < key + png_ptr->current_text_size)
- text++;
-
- text_ptr = (png_textp)png_malloc(png_ptr, png_sizeof(png_text));
- text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
- text_ptr->key = key;
- text_ptr->itxt_length = 0;
- text_ptr->lang = NULL;
- text_ptr->lang_key = NULL;
- text_ptr->text = text;
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_free(png_ptr, key);
- png_free(png_ptr, text_ptr);
- png_ptr->current_text = NULL;
-
- if (ret)
- png_warning(png_ptr, "Insufficient memory to store text chunk");
- }
-}
-#endif
-
-#ifdef PNG_READ_zTXt_SUPPORTED
-void /* PRIVATE */
-png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
-{
- if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
- {
- PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
- png_error(png_ptr, "Out of place zTXt");
- /*NOT REACHED*/
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- /* We can't handle zTXt chunks > 64K, since we don't have enough space
- * to be able to store the uncompressed data. Actually, the threshold
- * is probably around 32K, but it isn't as definite as 64K is.
- */
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "zTXt chunk too large to fit in memory");
- png_push_crc_skip(png_ptr, length);
- return;
- }
-#endif
-
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
- png_ptr->current_text[length] = '\0';
- png_ptr->current_text_ptr = png_ptr->current_text;
- png_ptr->current_text_size = (png_size_t)length;
- png_ptr->current_text_left = (png_size_t)length;
- png_ptr->process_mode = PNG_READ_zTXt_MODE;
-}
-
-void /* PRIVATE */
-png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr->buffer_size && png_ptr->current_text_left)
- {
- png_size_t text_size;
-
- if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left)
- text_size = png_ptr->buffer_size;
-
- else
- text_size = png_ptr->current_text_left;
-
- png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
- png_ptr->current_text_left -= text_size;
- png_ptr->current_text_ptr += text_size;
- }
- if (!(png_ptr->current_text_left))
- {
- png_textp text_ptr;
- png_charp text;
- png_charp key;
- int ret;
- png_size_t text_size, key_size;
-
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_crc_finish(png_ptr);
-
- key = png_ptr->current_text;
-
- for (text = key; *text; text++)
- /* Empty loop */ ;
-
- /* zTXt can't have zero text */
- if (text >= key + png_ptr->current_text_size)
- {
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- return;
- }
-
- text++;
-
- if (*text != PNG_TEXT_COMPRESSION_zTXt) /* Check compression byte */
- {
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- return;
- }
-
- text++;
-
- png_ptr->zstream.next_in = (png_bytep)text;
- png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size -
- (text - key));
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
-
- key_size = text - key;
- text_size = 0;
- text = NULL;
- ret = Z_STREAM_END;
-
- while (png_ptr->zstream.avail_in)
- {
- ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
- if (ret != Z_OK && ret != Z_STREAM_END)
- {
- inflateReset(&png_ptr->zstream);
- png_ptr->zstream.avail_in = 0;
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- png_free(png_ptr, text);
- return;
- }
-
- if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END)
- {
- if (text == NULL)
- {
- text = (png_charp)png_malloc(png_ptr,
- (png_ptr->zbuf_size
- - png_ptr->zstream.avail_out + key_size + 1));
-
- png_memcpy(text + key_size, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
-
- png_memcpy(text, key, key_size);
-
- text_size = key_size + png_ptr->zbuf_size -
- png_ptr->zstream.avail_out;
-
- *(text + text_size) = '\0';
- }
-
- else
- {
- png_charp tmp;
-
- tmp = text;
- text = (png_charp)png_malloc(png_ptr, text_size +
- (png_ptr->zbuf_size
- - png_ptr->zstream.avail_out + 1));
-
- png_memcpy(text, tmp, text_size);
- png_free(png_ptr, tmp);
-
- png_memcpy(text + text_size, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
-
- text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
- *(text + text_size) = '\0';
- }
-
- if (ret != Z_STREAM_END)
- {
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- }
- }
- else
- {
- break;
- }
-
- if (ret == Z_STREAM_END)
- break;
- }
-
- inflateReset(&png_ptr->zstream);
- png_ptr->zstream.avail_in = 0;
-
- if (ret != Z_STREAM_END)
- {
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- png_free(png_ptr, text);
- return;
- }
-
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- key = text;
- text += key_size;
-
- text_ptr = (png_textp)png_malloc(png_ptr,
- png_sizeof(png_text));
- text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
- text_ptr->key = key;
- text_ptr->itxt_length = 0;
- text_ptr->lang = NULL;
- text_ptr->lang_key = NULL;
- text_ptr->text = text;
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_free(png_ptr, key);
- png_free(png_ptr, text_ptr);
-
- if (ret)
- png_warning(png_ptr, "Insufficient memory to store text chunk");
- }
-}
-#endif
-
-#ifdef PNG_READ_iTXt_SUPPORTED
-void /* PRIVATE */
-png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
-{
- if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
- {
- PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
- png_error(png_ptr, "Out of place iTXt");
- /*NOT REACHED*/
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- png_ptr->skip_length = 0; /* This may not be necessary */
-
- if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
- {
- png_warning(png_ptr, "iTXt chunk too large to fit in memory");
- png_ptr->skip_length = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
-
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
- png_ptr->current_text[length] = '\0';
- png_ptr->current_text_ptr = png_ptr->current_text;
- png_ptr->current_text_size = (png_size_t)length;
- png_ptr->current_text_left = (png_size_t)length;
- png_ptr->process_mode = PNG_READ_iTXt_MODE;
-}
-
-void /* PRIVATE */
-png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
-{
-
- if (png_ptr->buffer_size && png_ptr->current_text_left)
- {
- png_size_t text_size;
-
- if (png_ptr->buffer_size < png_ptr->current_text_left)
- text_size = png_ptr->buffer_size;
-
- else
- text_size = png_ptr->current_text_left;
-
- png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
- png_ptr->current_text_left -= text_size;
- png_ptr->current_text_ptr += text_size;
- }
-
- if (!(png_ptr->current_text_left))
- {
- png_textp text_ptr;
- png_charp key;
- int comp_flag;
- png_charp lang;
- png_charp lang_key;
- png_charp text;
- int ret;
-
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_crc_finish(png_ptr);
-
-#ifdef PNG_MAX_MALLOC_64K
- if (png_ptr->skip_length)
- return;
-#endif
-
- key = png_ptr->current_text;
-
- for (lang = key; *lang; lang++)
- /* Empty loop */ ;
-
- if (lang < key + png_ptr->current_text_size - 3)
- lang++;
-
- comp_flag = *lang++;
- lang++; /* Skip comp_type, always zero */
-
- for (lang_key = lang; *lang_key; lang_key++)
- /* Empty loop */ ;
-
- lang_key++; /* Skip NUL separator */
-
- text=lang_key;
-
- if (lang_key < key + png_ptr->current_text_size - 1)
- {
- for (; *text; text++)
- /* Empty loop */ ;
- }
-
- if (text < key + png_ptr->current_text_size)
- text++;
-
- text_ptr = (png_textp)png_malloc(png_ptr,
- png_sizeof(png_text));
-
- text_ptr->compression = comp_flag + 2;
- text_ptr->key = key;
- text_ptr->lang = lang;
- text_ptr->lang_key = lang_key;
- text_ptr->text = text;
- text_ptr->text_length = 0;
- text_ptr->itxt_length = png_strlen(text);
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_ptr->current_text = NULL;
-
- png_free(png_ptr, text_ptr);
- if (ret)
- png_warning(png_ptr, "Insufficient memory to store iTXt chunk");
- }
-}
-#endif
-
-/* This function is called when we haven't found a handler for this
- * chunk. If there isn't a problem with the chunk itself (ie a bad chunk
- * name or a critical chunk), the chunk is (currently) silently ignored.
- */
-void /* PRIVATE */
-png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
-{
- png_uint_32 skip = 0;
-
- if (!(png_ptr->chunk_name[0] & 0x20))
- {
-#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- && png_ptr->read_user_chunk_fn == NULL
-#endif
- )
-#endif
- png_chunk_error(png_ptr, "unknown critical chunk");
-
- PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
- }
-
-#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
- if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
- {
-#ifdef PNG_MAX_MALLOC_64K
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "unknown chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
- png_memcpy((png_charp)png_ptr->unknown_chunk.name,
- (png_charp)png_ptr->chunk_name,
- png_sizeof(png_ptr->unknown_chunk.name));
- png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name) - 1]
- = '\0';
-
- png_ptr->unknown_chunk.size = (png_size_t)length;
-
- if (length == 0)
- png_ptr->unknown_chunk.data = NULL;
-
- else
- {
- png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
- (png_size_t)length);
- png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
- }
-
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- if (png_ptr->read_user_chunk_fn != NULL)
- {
- /* Callback to user unknown chunk handler */
- int ret;
- ret = (*(png_ptr->read_user_chunk_fn))
- (png_ptr, &png_ptr->unknown_chunk);
-
- if (ret < 0)
- png_chunk_error(png_ptr, "error in user chunk");
-
- if (ret == 0)
- {
- if (!(png_ptr->chunk_name[0] & 0x20))
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS)
- png_chunk_error(png_ptr, "unknown critical chunk");
- png_set_unknown_chunks(png_ptr, info_ptr,
- &png_ptr->unknown_chunk, 1);
- }
- }
-
- else
-#endif
- png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
- png_free(png_ptr, png_ptr->unknown_chunk.data);
- png_ptr->unknown_chunk.data = NULL;
- }
-
- else
-#endif
- skip=length;
- png_push_crc_skip(png_ptr, skip);
-}
-
-void /* PRIVATE */
-png_push_have_info(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr->info_fn != NULL)
- (*(png_ptr->info_fn))(png_ptr, info_ptr);
-}
-
-void /* PRIVATE */
-png_push_have_end(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr->end_fn != NULL)
- (*(png_ptr->end_fn))(png_ptr, info_ptr);
-}
-
-void /* PRIVATE */
-png_push_have_row(png_structp png_ptr, png_bytep row)
-{
- if (png_ptr->row_fn != NULL)
- (*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number,
- (int)png_ptr->pass);
-}
-
-void PNGAPI
-png_progressive_combine_row (png_structp png_ptr, png_bytep old_row,
- png_const_bytep new_row)
-{
- PNG_CONST int FARDATA png_pass_dsp_mask[7] =
- {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
-
- if (png_ptr == NULL)
- return;
-
- if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */
- png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
-}
-
-void PNGAPI
-png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
- png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
- png_progressive_end_ptr end_fn)
-{
- if (png_ptr == NULL)
- return;
-
- png_ptr->info_fn = info_fn;
- png_ptr->row_fn = row_fn;
- png_ptr->end_fn = end_fn;
-
- png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer);
-}
-
-png_voidp PNGAPI
-png_get_progressive_ptr(png_const_structp png_ptr)
-{
- if (png_ptr == NULL)
- return (NULL);
-
- return png_ptr->io_ptr;
-}
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+++ /dev/null
-
-/* pngpriv.h - private declarations for use inside libpng
- *
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * Last changed in libpng 1.5.2 [March 31, 2011]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-/* The symbols declared in this file (including the functions declared
- * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public
- * interface, and are not recommended for use by regular applications.
- * Some of them may become public in the future; others may stay private,
- * change in an incompatible way, or even disappear.
- * Although the libpng users are not forbidden to include this header,
- * they should be well aware of the issues that may arise from doing so.
- */
-
-#ifndef PNGPRIV_H
-#define PNGPRIV_H
-
-/* This is required for the definition of abort(), used as a last ditch
- * error handler when all else fails.
- */
-#include <stdlib.h>
-
-#define PNGLIB_BUILD
-#ifdef PNG_USER_CONFIG
-# include "pngusr.h"
- /* These should have been defined in pngusr.h */
-# ifndef PNG_USER_PRIVATEBUILD
-# define PNG_USER_PRIVATEBUILD "Custom libpng build"
-# endif
-# ifndef PNG_USER_DLLFNAME_POSTFIX
-# define PNG_USER_DLLFNAME_POSTFIX "Cb"
-# endif
-#endif
-#include "png.h"
-#include "pnginfo.h"
-#include "pngstruct.h"
-
-/* This is used for 16 bit gamma tables - only the top level pointers are const,
- * this could be changed:
- */
-typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
-
-/* Added at libpng-1.2.9 */
-/* Moved to pngpriv.h at libpng-1.5.0 */
-
-/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"
- * script. We may need it here to get the correct configuration on things
- * like limits.
- */
-#ifdef PNG_CONFIGURE_LIBPNG
-# ifdef HAVE_CONFIG_H
-# include "config.h"
-# endif
-#endif
-
-/* Moved to pngpriv.h at libpng-1.5.0 */
-/* NOTE: some of these may have been used in external applications as
- * these definitions were exposed in pngconf.h prior to 1.5.
- */
-
-/* If you are running on a machine where you cannot allocate more
- * than 64K of memory at once, uncomment this. While libpng will not
- * normally need that much memory in a chunk (unless you load up a very
- * large file), zlib needs to know how big of a chunk it can use, and
- * libpng thus makes sure to check any memory allocation to verify it
- * will fit into memory.
- *
- * zlib provides 'MAXSEG_64K' which, if defined, indicates the
- * same limit and pngconf.h (already included) sets the limit
- * if certain operating systems are detected.
- */
-#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
-# define PNG_MAX_MALLOC_64K
-#endif
-
-#ifndef PNG_UNUSED
-/* Unused formal parameter warnings are silenced using the following macro
- * which is expected to have no bad effects on performance (optimizing
- * compilers will probably remove it entirely). Note that if you replace
- * it with something other than whitespace, you must include the terminating
- * semicolon.
- */
-# define PNG_UNUSED(param) (void)param;
-#endif
-
-/* Just a little check that someone hasn't tried to define something
- * contradictory.
- */
-#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
-# undef PNG_ZBUF_SIZE
-# define PNG_ZBUF_SIZE 65536L
-#endif
-
-/* If warnings or errors are turned off the code is disabled
- * or redirected here.
- */
-#ifndef PNG_WARNINGS_SUPPORTED
-# define png_warning(s1,s2) ((void)0)
-# define png_chunk_warning(s1,s2) ((void)0)
-#endif
-#ifndef PNG_ERROR_TEXT_SUPPORTED
-# define png_error(s1,s2) png_err(s1)
-# define png_chunk_error(s1,s2) png_err(s1)
-# define png_fixed_error(s1,s2) png_err(s1)
-#endif
-
-#ifndef PNG_EXTERN
-/* The functions exported by PNG_EXTERN are internal functions, which
- * aren't usually used outside the library (as far as I know), so it is
- * debatable if they should be exported at all. In the future, when it
- * is possible to have run-time registry of chunk-handling functions,
- * some of these might be made available again.
-# define PNG_EXTERN extern
- */
-# define PNG_EXTERN
-#endif
-
-/* Some fixed point APIs are still required even if not exported because
- * they get used by the corresponding floating point APIs. This magic
- * deals with this:
- */
-#ifdef PNG_FIXED_POINT_SUPPORTED
-# define PNGFAPI PNGAPI
-#else
-# define PNGFAPI /* PRIVATE */
-#endif
-
-/* Other defines specific to compilers can go here. Try to keep
- * them inside an appropriate ifdef/endif pair for portability.
- */
-#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\
- defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
- /* png.c requires the following ANSI-C constants if the conversion of
- * floating point to ASCII is implemented therein:
- *
- * DBL_DIG Maximum number of decimal digits (can be set to any constant)
- * DBL_MIN Smallest normalized fp number (can be set to an arbitrary value)
- * DBL_MAX Maximum floating point number (can be set to an arbitrary value)
- */
-# include <float.h>
-
-# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
- defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
- /* We need to check that <math.h> hasn't already been included earlier
- * as it seems it doesn't agree with <fp.h>, yet we should really use
- * <fp.h> if possible.
- */
-# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
-# include <fp.h>
-# endif
-# else
-# include <math.h>
-# endif
-# if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
- /* Amiga SAS/C: We must include builtin FPU functions when compiling using
- * MATH=68881
- */
-# include <m68881.h>
-# endif
-#endif
-
-/* This provides the non-ANSI (far) memory allocation routines. */
-#if defined(__TURBOC__) && defined(__MSDOS__)
-# include <mem.h>
-# include <alloc.h>
-#endif
-
-#if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \
- defined(_WIN32) || defined(__WIN32__)
-# include <windows.h> /* defines _WINDOWS_ macro */
-#endif
-
-/* Moved here around 1.5.0beta36 from pngconf.h */
-/* Users may want to use these so they are not private. Any library
- * functions that are passed far data must be model-independent.
- */
-
-/* Memory model/platform independent fns */
-#ifndef PNG_ABORT
-# ifdef _WINDOWS_
-# define PNG_ABORT() ExitProcess(0)
-# else
-# define PNG_ABORT() abort()
-# endif
-#endif
-
-#ifdef USE_FAR_KEYWORD
-/* Use this to make far-to-near assignments */
-# define CHECK 1
-# define NOCHECK 0
-# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
-# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
-# define png_strcpy _fstrcpy
-# define png_strncpy _fstrncpy /* Added to v 1.2.6 */
-# define png_strlen _fstrlen
-# define png_memcmp _fmemcmp /* SJT: added */
-# define png_memcpy _fmemcpy
-# define png_memset _fmemset
-# define png_sprintf sprintf
-#else
-# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */
-# define CVT_PTR(ptr) (ptr)
-# define CVT_PTR_NOCHECK(ptr) (ptr)
-# define png_strcpy lstrcpyA
-# define png_strncpy lstrcpynA
-# define png_strlen lstrlenA
-# define png_memcmp memcmp
-# define png_memcpy CopyMemory
-# define png_memset memset
-# define png_sprintf wsprintfA
-# else
-# define CVT_PTR(ptr) (ptr)
-# define CVT_PTR_NOCHECK(ptr) (ptr)
-# define png_strcpy strcpy
-# define png_strncpy strncpy /* Added to v 1.2.6 */
-# define png_strlen strlen
-# define png_memcmp memcmp /* SJT: added */
-# define png_memcpy memcpy
-# define png_memset memset
-# define png_sprintf sprintf
-# endif
-#endif
-/* End of memory model/platform independent support */
-
-#ifndef PNG_NO_SNPRINTF
-# ifdef _MSC_VER
-# define png_snprintf _snprintf /* Added to v 1.2.19 */
-# define png_snprintf2 _snprintf
-# define png_snprintf6 _snprintf
-# else
-# define png_snprintf snprintf /* Added to v 1.2.19 */
-# define png_snprintf2 snprintf
-# define png_snprintf6 snprintf
-# endif
-#else
- /* You don't have or don't want to use snprintf(). Caution: Using
- * sprintf instead of snprintf exposes your application to accidental
- * or malevolent buffer overflows. If you don't have snprintf()
- * as a general rule you should provide one (you can get one from
- * Portable OpenSSH).
- */
-# define png_snprintf(s1,n,fmt,x1) png_sprintf(s1,fmt,x1)
-# define png_snprintf2(s1,n,fmt,x1,x2) png_sprintf(s1,fmt,x1,x2)
-# define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
- png_sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
-#endif
-/* End of 1.5.0beta36 move from pngconf.h */
-
-/* CONSTANTS and UTILITY MACROS
- * These are used internally by libpng and not exposed in the API
- */
-
-/* Various modes of operation. Note that after an init, mode is set to
- * zero automatically when the structure is created.
- */
-#define PNG_HAVE_IHDR 0x01
-#define PNG_HAVE_PLTE 0x02
-#define PNG_HAVE_IDAT 0x04
-#define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */
-#define PNG_HAVE_IEND 0x10
-#define PNG_HAVE_gAMA 0x20
-#define PNG_HAVE_cHRM 0x40
-#define PNG_HAVE_sRGB 0x80
-#define PNG_HAVE_CHUNK_HEADER 0x100
-#define PNG_WROTE_tIME 0x200
-#define PNG_WROTE_INFO_BEFORE_PLTE 0x400
-#define PNG_BACKGROUND_IS_GRAY 0x800
-#define PNG_HAVE_PNG_SIGNATURE 0x1000
-#define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */
-
-/* Flags for the transformations the PNG library does on the image data */
-#define PNG_BGR 0x0001
-#define PNG_INTERLACE 0x0002
-#define PNG_PACK 0x0004
-#define PNG_SHIFT 0x0008
-#define PNG_SWAP_BYTES 0x0010
-#define PNG_INVERT_MONO 0x0020
-#define PNG_QUANTIZE 0x0040
-#define PNG_BACKGROUND 0x0080
-#define PNG_BACKGROUND_EXPAND 0x0100
-#define PNG_EXPAND_16 0x0200 /* Added to libpng 1.5.2 */
-#define PNG_16_TO_8 0x0400
-#define PNG_RGBA 0x0800
-#define PNG_EXPAND 0x1000
-#define PNG_GAMMA 0x2000
-#define PNG_GRAY_TO_RGB 0x4000
-#define PNG_FILLER 0x8000L
-#define PNG_PACKSWAP 0x10000L
-#define PNG_SWAP_ALPHA 0x20000L
-#define PNG_STRIP_ALPHA 0x40000L
-#define PNG_INVERT_ALPHA 0x80000L
-#define PNG_USER_TRANSFORM 0x100000L
-#define PNG_RGB_TO_GRAY_ERR 0x200000L
-#define PNG_RGB_TO_GRAY_WARN 0x400000L
-#define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */
- /* 0x800000L Unused */
-#define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */
-#define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */
- /* 0x4000000L unused */
- /* 0x8000000L unused */
- /* 0x10000000L unused */
- /* 0x20000000L unused */
- /* 0x40000000L unused */
-
-/* Flags for png_create_struct */
-#define PNG_STRUCT_PNG 0x0001
-#define PNG_STRUCT_INFO 0x0002
-
-/* Scaling factor for filter heuristic weighting calculations */
-#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT))
-#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT))
-
-/* Flags for the png_ptr->flags rather than declaring a byte for each one */
-#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001
-#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002
-#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004
-#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008
-#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010
-#define PNG_FLAG_ZLIB_FINISHED 0x0020
-#define PNG_FLAG_ROW_INIT 0x0040
-#define PNG_FLAG_FILLER_AFTER 0x0080
-#define PNG_FLAG_CRC_ANCILLARY_USE 0x0100
-#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200
-#define PNG_FLAG_CRC_CRITICAL_USE 0x0400
-#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800
- /* 0x1000 unused */
- /* 0x2000 unused */
- /* 0x4000 unused */
-#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L
-#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L
-#define PNG_FLAG_LIBRARY_MISMATCH 0x20000L
-#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L
-#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L
-#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L
- /* 0x200000L unused */
- /* 0x400000L unused */
-#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000L /* Added to libpng-1.4.0 */
- /* 0x1000000L unused */
- /* 0x2000000L unused */
- /* 0x4000000L unused */
- /* 0x8000000L unused */
- /* 0x10000000L unused */
- /* 0x20000000L unused */
- /* 0x40000000L unused */
-
-#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \
- PNG_FLAG_CRC_ANCILLARY_NOWARN)
-
-#define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \
- PNG_FLAG_CRC_CRITICAL_IGNORE)
-
-#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \
- PNG_FLAG_CRC_CRITICAL_MASK)
-
-/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib
- * can handle at once. This type need be no larger than 16 bits (so maximum of
- * 65535), this define allows us to discover how big it is, but limited by the
- * maximuum for png_size_t. The value can be overriden in a library build
- * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably
- * lower value (e.g. 255 works). A lower value may help memory usage (slightly)
- * and may even improve performance on some systems (and degrade it on others.)
- */
-#ifndef ZLIB_IO_MAX
-# define ZLIB_IO_MAX ((uInt)-1)
-#endif
-
-/* Save typing and make code easier to understand */
-
-#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \
- abs((int)((c1).green) - (int)((c2).green)) + \
- abs((int)((c1).blue) - (int)((c2).blue)))
-
-/* Added to libpng-1.2.6 JB */
-#define PNG_ROWBYTES(pixel_bits, width) \
- ((pixel_bits) >= 8 ? \
- ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \
- (( ((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3) )
-
-/* PNG_OUT_OF_RANGE returns true if value is outside the range
- * ideal-delta..ideal+delta. Each argument is evaluated twice.
- * "ideal" and "delta" should be constants, normally simple
- * integers, "value" a variable. Added to libpng-1.2.6 JB
- */
-#define PNG_OUT_OF_RANGE(value, ideal, delta) \
- ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) )
-
-/* Conversions between fixed and floating point, only defined if
- * required (to make sure the code doesn't accidentally use float
- * when it is supposedly disabled.)
- */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-/* The floating point conversion can't overflow, though it can and
- * does lose accuracy relative to the original fixed point value.
- * In practice this doesn't matter because png_fixed_point only
- * stores numbers with very low precision. The png_ptr and s
- * arguments are unused by default but are there in case error
- * checking becomes a requirement.
- */
-#define png_float(png_ptr, fixed, s) (.00001 * (fixed))
-
-/* The fixed point conversion performs range checking and evaluates
- * its argument multiple times, so must be used with care. The
- * range checking uses the PNG specification values for a signed
- * 32 bit fixed point value except that the values are deliberately
- * rounded-to-zero to an integral value - 21474 (21474.83 is roughly
- * (2^31-1) * 100000). 's' is a string that describes the value being
- * converted.
- *
- * NOTE: this macro will raise a png_error if the range check fails,
- * therefore it is normally only appropriate to use this on values
- * that come from API calls or other sources where an out of range
- * error indicates a programming error, not a data error!
- *
- * NOTE: by default this is off - the macro is not used - because the
- * function call saves a lot of code.
- */
-#ifdef PNG_FIXED_POINT_MACRO_SUPPORTED
-#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\
- ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0))
-#else
-PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
- png_const_charp text));
-#endif
-#endif
-
-/* Constant strings for known chunk types. If you need to add a chunk,
- * define the name here, and add an invocation of the macro wherever it's
- * needed.
- */
-#define PNG_IHDR PNG_CONST png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'}
-#define PNG_IDAT PNG_CONST png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'}
-#define PNG_IEND PNG_CONST png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'}
-#define PNG_PLTE PNG_CONST png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'}
-#define PNG_bKGD PNG_CONST png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'}
-#define PNG_cHRM PNG_CONST png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'}
-#define PNG_gAMA PNG_CONST png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'}
-#define PNG_hIST PNG_CONST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'}
-#define PNG_iCCP PNG_CONST png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'}
-#define PNG_iTXt PNG_CONST png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'}
-#define PNG_oFFs PNG_CONST png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'}
-#define PNG_pCAL PNG_CONST png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'}
-#define PNG_sCAL PNG_CONST png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'}
-#define PNG_pHYs PNG_CONST png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'}
-#define PNG_sBIT PNG_CONST png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'}
-#define PNG_sPLT PNG_CONST png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'}
-#define PNG_sRGB PNG_CONST png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'}
-#define PNG_sTER PNG_CONST png_byte png_sTER[5] = {115, 84, 69, 82, '\0'}
-#define PNG_tEXt PNG_CONST png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'}
-#define PNG_tIME PNG_CONST png_byte png_tIME[5] = {116, 73, 77, 69, '\0'}
-#define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'}
-#define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'}
-
-
-/* Inhibit C++ name-mangling for libpng functions but not for system calls. */
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-/* These functions are used internally in the code. They generally
- * shouldn't be used unless you are writing code to add or replace some
- * functionality in libpng. More information about most functions can
- * be found in the files where the functions are located.
- */
-
-/* Allocate memory for an internal libpng struct */
-PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)),
- PNG_ALLOCATED);
-
-/* Free memory from internal libpng struct */
-PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr));
-
-PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2,
- PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)),
- PNG_ALLOCATED);
-PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr,
- png_free_ptr free_fn, png_voidp mem_ptr));
-
-/* Free any memory that info_ptr points to and reset struct. */
-PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-
-/* Function to allocate memory for zlib. PNGAPI is disallowed. */
-PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items,
- uInt size)),PNG_ALLOCATED);
-
-/* Function to free memory for zlib. PNGAPI is disallowed. */
-PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr));
-
-/* Next four functions are used internally as callbacks. PNGCBAPI is required
- * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to
- * PNGCBAPI at 1.5.0
- */
-
-PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr,
- png_bytep data, png_size_t length));
-
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr,
- png_bytep buffer, png_size_t length));
-#endif
-
-PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr,
- png_bytep data, png_size_t length));
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
-# ifdef PNG_STDIO_SUPPORTED
-PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr));
-# endif
-#endif
-
-/* Reset the CRC variable */
-PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr));
-
-/* Write the "data" buffer to whatever output you are using */
-PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr,
- png_const_bytep data, png_size_t length));
-
-/* Read and check the PNG file signature */
-PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr));
-
-/* Read the chunk header (length + type name) */
-PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr));
-
-/* Read data from whatever input you are using into the "data" buffer */
-PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data,
- png_size_t length));
-
-/* Read bytes into buf, and update png_ptr->crc */
-PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf,
- png_size_t length));
-
-/* Decompress data in a chunk that uses compression */
-#if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \
- defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
-PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr,
- int comp_type, png_size_t chunklength, png_size_t prefix_length,
- png_size_t *data_length));
-#endif
-
-/* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */
-PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip));
-
-/* Read the CRC from the file and compare it to the libpng calculated CRC */
-PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr));
-
-/* Calculate the CRC over a section of data. Note that we are only
- * passing a maximum of 64K on systems that have this as a memory limit,
- * since this is the maximum buffer size we can specify.
- */
-PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr,
- png_const_bytep ptr, png_size_t length));
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
-PNG_EXTERN void png_flush PNGARG((png_structp png_ptr));
-#endif
-
-/* Write various chunks */
-
-/* Write the IHDR chunk, and update the png_struct with the necessary
- * information.
- */
-PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width,
- png_uint_32 height,
- int bit_depth, int color_type, int compression_method, int filter_method,
- int interlace_method));
-
-PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr,
- png_const_colorp palette, png_uint_32 num_pal));
-
-PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data,
- png_size_t length));
-
-PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr));
-
-#ifdef PNG_WRITE_gAMA_SUPPORTED
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma));
-# endif
-# ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr,
- png_fixed_point file_gamma));
-# endif
-#endif
-
-#ifdef PNG_WRITE_sBIT_SUPPORTED
-PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr,
- png_const_color_8p sbit, int color_type));
-#endif
-
-#ifdef PNG_WRITE_cHRM_SUPPORTED
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr,
- double white_x, double white_y,
- double red_x, double red_y, double green_x, double green_y,
- double blue_x, double blue_y));
-# endif
-PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr,
- png_fixed_point int_white_x, png_fixed_point int_white_y,
- png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
- int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
- png_fixed_point int_blue_y));
-#endif
-
-#ifdef PNG_WRITE_sRGB_SUPPORTED
-PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr,
- int intent));
-#endif
-
-#ifdef PNG_WRITE_iCCP_SUPPORTED
-PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr,
- png_const_charp name, int compression_type,
- png_const_charp profile, int proflen));
- /* Note to maintainer: profile should be png_bytep */
-#endif
-
-#ifdef PNG_WRITE_sPLT_SUPPORTED
-PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr,
- png_const_sPLT_tp palette));
-#endif
-
-#ifdef PNG_WRITE_tRNS_SUPPORTED
-PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr,
- png_const_bytep trans, png_const_color_16p values, int number,
- int color_type));
-#endif
-
-#ifdef PNG_WRITE_bKGD_SUPPORTED
-PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr,
- png_const_color_16p values, int color_type));
-#endif
-
-#ifdef PNG_WRITE_hIST_SUPPORTED
-PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr,
- png_const_uint_16p hist, int num_hist));
-#endif
-
-#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
- defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
-PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr,
- png_const_charp key, png_charpp new_key));
-#endif
-
-#ifdef PNG_WRITE_tEXt_SUPPORTED
-PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key,
- png_const_charp text, png_size_t text_len));
-#endif
-
-#ifdef PNG_WRITE_zTXt_SUPPORTED
-PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key,
- png_const_charp text, png_size_t text_len, int compression));
-#endif
-
-#ifdef PNG_WRITE_iTXt_SUPPORTED
-PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr,
- int compression, png_const_charp key, png_const_charp lang,
- png_const_charp lang_key, png_const_charp text));
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */
-PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_const_textp text_ptr, int num_text));
-#endif
-
-#ifdef PNG_WRITE_oFFs_SUPPORTED
-PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr,
- png_int_32 x_offset, png_int_32 y_offset, int unit_type));
-#endif
-
-#ifdef PNG_WRITE_pCAL_SUPPORTED
-PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose,
- png_int_32 X0, png_int_32 X1, int type, int nparams,
- png_const_charp units, png_charpp params));
-#endif
-
-#ifdef PNG_WRITE_pHYs_SUPPORTED
-PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr,
- png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit,
- int unit_type));
-#endif
-
-#ifdef PNG_WRITE_tIME_SUPPORTED
-PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr,
- png_const_timep mod_time));
-#endif
-
-#ifdef PNG_WRITE_sCAL_SUPPORTED
-PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr,
- int unit, png_const_charp width, png_const_charp height));
-#endif
-
-/* Called when finished processing a row of data */
-PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr));
-
-/* Internal use only. Called before first row of data */
-PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr));
-
-/* Combine a row of data, dealing with alpha, etc. if requested */
-PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row,
- int mask));
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
-/* Expand an interlaced row */
-/* OLD pre-1.0.9 interface:
-PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info,
- png_bytep row, int pass, png_uint_32 transformations));
- */
-PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr));
-#endif
-
-/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */
-
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
-/* Grab pixels out of a row for an interlaced pass */
-PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info,
- png_bytep row, int pass));
-#endif
-
-/* Unfilter a row */
-PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr,
- png_row_infop row_info, png_bytep row, png_const_bytep prev_row,
- int filter));
-
-/* Choose the best filter to use and filter the row data */
-PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr,
- png_row_infop row_info));
-
-/* Write out the filtered row. */
-PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr,
- png_bytep filtered_row));
-/* Finish a row while reading, dealing with interlacing passes, etc. */
-PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr));
-
-/* Initialize the row buffers, etc. */
-PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr));
-/* Optional call to update the users info structure */
-PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-
-/* These are the functions that do the transformations */
-#ifdef PNG_READ_FILLER_SUPPORTED
-PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info,
- png_bytep row, png_uint_32 filler, png_uint_32 flags));
-#endif
-
-#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
-PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
-PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
-PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
-PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
- defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
-PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info,
- png_bytep row, int at_start));
-#endif
-
-#ifdef PNG_16BIT_SUPPORTED
-#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-#endif
-
-#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \
- defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr,
- png_row_infop row_info, png_bytep row));
-#endif
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
-PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_READ_PACK_SUPPORTED
-PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_READ_SHIFT_SUPPORTED
-PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info,
- png_bytep row, png_const_color_8p sig_bits));
-#endif
-
-#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
-PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_READ_16_TO_8_SUPPORTED
-PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
-PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info,
- png_bytep row, png_const_bytep palette_lookup,
- png_const_bytep quantize_lookup));
-
-# ifdef PNG_CORRECT_PALETTE_SUPPORTED
-PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr,
- png_colorp palette, int num_palette));
-# endif
-#endif
-
-#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-#ifdef PNG_WRITE_PACK_SUPPORTED
-PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info,
- png_bytep row, png_uint_32 bit_depth));
-#endif
-
-#ifdef PNG_WRITE_SHIFT_SUPPORTED
-PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info,
- png_bytep row, png_const_color_8p bit_depth));
-#endif
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
-# ifdef PNG_READ_GAMMA_SUPPORTED
-PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info,
- png_bytep row, png_const_color_16p trans_color,
- png_const_color_16p background, png_const_color_16p background_1,
- png_const_bytep gamma_table, png_const_bytep gamma_from_1,
- png_const_bytep gamma_to_1, png_const_uint_16pp gamma_16,
- png_const_uint_16pp gamma_16_from_1, png_const_uint_16pp gamma_16_to_1,
- int gamma_shift));
-# else
-PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info,
- png_bytep row, png_const_color_16p trans_color,
- png_const_color_16p background));
-# endif
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
-PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info,
- png_bytep row, png_const_bytep gamma_table,
- png_const_uint_16pp gamma_16_table, int gamma_shift));
-#endif
-
-#ifdef PNG_READ_EXPAND_SUPPORTED
-PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info,
- png_bytep row, png_const_colorp palette, png_const_bytep trans,
- int num_trans));
-PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info,
- png_bytep row, png_const_color_16p trans_color));
-#endif
-
-#ifdef PNG_READ_EXPAND_16_SUPPORTED
-PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-/* The following decodes the appropriate chunks, and does error correction,
- * then calls the appropriate callback for the chunk if it is valid.
- */
-
-/* Decode the IHDR chunk */
-PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-
-#ifdef PNG_READ_bKGD_SUPPORTED
-PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_cHRM_SUPPORTED
-PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_gAMA_SUPPORTED
-PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_hIST_SUPPORTED
-PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_iCCP_SUPPORTED
-PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif /* PNG_READ_iCCP_SUPPORTED */
-
-#ifdef PNG_READ_iTXt_SUPPORTED
-PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_oFFs_SUPPORTED
-PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_pCAL_SUPPORTED
-PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_pHYs_SUPPORTED
-PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_sBIT_SUPPORTED
-PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_sCAL_SUPPORTED
-PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_sPLT_SUPPORTED
-PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif /* PNG_READ_sPLT_SUPPORTED */
-
-#ifdef PNG_READ_sRGB_SUPPORTED
-PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_tEXt_SUPPORTED
-PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_tIME_SUPPORTED
-PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_tRNS_SUPPORTED
-PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-#ifdef PNG_READ_zTXt_SUPPORTED
-PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
-#endif
-
-PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
-
-PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr,
- png_const_bytep chunk_name));
-
-/* Handle the transformations for reading and writing */
-PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr));
-PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr));
-
-PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr));
-
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr));
-PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr,
- png_uint_32 length));
-PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr));
-PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr));
-PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr,
- png_bytep buffer, png_size_t buffer_length));
-PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr));
-PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr,
- png_bytep buffer, png_size_t buffer_length));
-PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr));
-PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
-PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row));
-PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr));
-# ifdef PNG_READ_tEXt_SUPPORTED
-PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
-PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-# endif
-# ifdef PNG_READ_zTXt_SUPPORTED
-PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
-PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-# endif
-# ifdef PNG_READ_iTXt_SUPPORTED
-PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
-PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-# endif
-
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
-PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info,
- png_bytep row));
-PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info,
- png_bytep row));
-#endif
-
-/* Added at libpng version 1.4.0 */
-#ifdef PNG_CHECK_cHRM_SUPPORTED
-PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr,
- png_fixed_point int_white_x, png_fixed_point int_white_y,
- png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
- int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
- png_fixed_point int_blue_y));
-#endif
-
-#ifdef PNG_CHECK_cHRM_SUPPORTED
-/* Added at libpng version 1.2.34 and 1.4.0 */
-/* Currently only used by png_check_cHRM_fixed */
-PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2,
- unsigned long *hi_product, unsigned long *lo_product));
-#endif
-
-/* Added at libpng version 1.4.0 */
-PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr,
- png_uint_32 width, png_uint_32 height, int bit_depth,
- int color_type, int interlace_type, int compression_type,
- int filter_type));
-
-/* Free all memory used by the read (old method - NOT DLL EXPORTED) */
-PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_infop end_info_ptr));
-
-/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */
-PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr));
-
-#ifdef USE_FAR_KEYWORD /* memory model conversion function */
-PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr,
- int check));
-#endif /* USE_FAR_KEYWORD */
-
-#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
-PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr,
- png_const_charp name),PNG_NORETURN);
-#endif
-
-/* ASCII to FP interfaces, currently only implemented if sCAL
- * support is required.
- */
-#if defined(PNG_READ_sCAL_SUPPORTED)
-/* MAX_DIGITS is actually the maximum number of characters in an sCAL
- * width or height, derived from the precision (number of significant
- * digits - a build time settable option) and assumpitions about the
- * maximum ridiculous exponent.
- */
-#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/)
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii,
- png_size_t size, double fp, unsigned int precision));
-#endif /* FLOATING_POINT */
-
-#ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr,
- png_charp ascii, png_size_t size, png_fixed_point fp));
-#endif /* FIXED_POINT */
-#endif /* READ_sCAL */
-
-#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED)
-/* An internal API to validate the format of a floating point number.
- * The result is the index of the next character. If the number is
- * not valid it will be the index of a character in the supposed number.
- *
- * The format of a number is defined in the PNG extensions specification
- * and this API is strictly conformant to that spec, not anyone elses!
- *
- * The format as a regular expression is:
- *
- * [+-]?[0-9]+.?([Ee][+-]?[0-9]+)?
- *
- * or:
- *
- * [+-]?.[0-9]+(.[0-9]+)?([Ee][+-]?[0-9]+)?
- *
- * The complexity is that either integer or fraction must be present and the
- * fraction is permitted to have no digits only if the integer is present.
- *
- * NOTE: The dangling E problem.
- * There is a PNG valid floating point number in the following:
- *
- * PNG floating point numb1.ers are not greedy.
- *
- * Working this out requires *TWO* character lookahead (because of the
- * sign), the parser does not do this - it will fail at the 'r' - this
- * doesn't matter for PNG sCAL chunk values, but it requires more care
- * if the value were ever to be embedded in something more complex. Use
- * ANSI-C strtod if you need the lookahead.
- */
-/* State table for the parser. */
-#define PNG_FP_INTEGER 0 /* before or in integer */
-#define PNG_FP_FRACTION 1 /* before or in fraction */
-#define PNG_FP_EXPONENT 2 /* before or in exponent */
-#define PNG_FP_STATE 3 /* mask for the above */
-#define PNG_FP_SAW_SIGN 4 /* Saw +/- in current state */
-#define PNG_FP_SAW_DIGIT 8 /* Saw a digit in current state */
-#define PNG_FP_SAW_DOT 16 /* Saw a dot in current state */
-#define PNG_FP_SAW_E 32 /* Saw an E (or e) in current state */
-#define PNG_FP_SAW_ANY 60 /* Saw any of the above 4 */
-#define PNG_FP_WAS_VALID 64 /* Preceding substring is a valid fp number */
-#define PNG_FP_INVALID 128 /* Available for callers as a distinct value */
-
-/* Result codes for the parser (boolean - true meants ok, false means
- * not ok yet.)
- */
-#define PNG_FP_MAYBE 0 /* The number may be valid in the future */
-#define PNG_FP_OK 1 /* The number is valid */
-
-/* The actual parser. This can be called repeatedly, it updates
- * the index into the string and the state variable (which must
- * be initialzed to 0). It returns a result code, as above. There
- * is no point calling the parser any more if it fails to advance to
- * the end of the string - it is stuck on an invalid character (or
- * terminated by '\0').
- *
- * Note that the pointer will consume an E or even an E+ then leave
- * a 'maybe' state even though a preceding integer.fraction is valid.
- * The PNG_FP_WAS_VALID flag indicates that a preceding substring was
- * a valid number. It's possible to recover from this by calling
- * the parser again (from the start, with state 0) but with a string
- * that omits the last character (i.e. set the size to the index of
- * the problem character.) This has not been tested within libpng.
- */
-PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string,
- png_size_t size, int *statep, png_size_tp whereami));
-
-/* This is the same but it checks a complete string and returns true
- * only if it just contains a floating point number.
- */
-PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string,
- png_size_t size));
-#endif /* pCAL || sCAL */
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) ||\
- defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
-/* Added at libpng version 1.5.0 */
-/* This is a utility to provide a*times/div (rounded) and indicate
- * if there is an overflow. The result is a boolean - false (0)
- * for overflow, true (1) if no overflow, in which case *res
- * holds the result.
- */
-PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a,
- png_int_32 multiplied_by, png_int_32 divided_by));
-#endif
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
-/* Same deal, but issue a warning on overflow and return 0. */
-PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr,
- png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by));
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
-/* Calculate a reciprocal - used for gamma values. This returns
- * 0 if the argument is 0 in order to maintain an undefined value,
- * there are no warnings.
- */
-PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a));
-
-/* The same but gives a reciprocal of the product of two fixed point
- * values. Accuracy is suitable for gamma calculations but this is
- * not exact - use png_muldiv for that.
- */
-PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a,
- png_fixed_point b));
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
-/* Internal fixed point gamma correction. These APIs are called as
- * required to convert single values - they don't need to be fast,
- * they are not used when processing image pixel values.
- *
- * While the input is an 'unsigned' value it must actually be the
- * correct bit value - 0..255 or 0..65535 as required.
- */
-PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr,
- unsigned int value, png_fixed_point gamma_value));
-PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value));
-PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value,
- png_fixed_point gamma_value));
-PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value,
- png_fixed_point gamma_value));
-PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
- int bit_depth));
-#endif
-
-/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
-
-
-#include "pngdebug.h"
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* PNGPRIV_H */
+++ /dev/null
-
-/* pngread.c - read a PNG file
- *
- * Last changed in libpng 1.5.2 [March 31, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * This file contains routines that an application calls directly to
- * read a PNG file or stream.
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_READ_SUPPORTED
-
-/* Create a PNG structure for reading, and allocate any memory needed. */
-PNG_FUNCTION(png_structp,PNGAPI
-png_create_read_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED)
-{
-
-#ifdef PNG_USER_MEM_SUPPORTED
- return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn,
- warn_fn, NULL, NULL, NULL));
-}
-
-/* Alternate create PNG structure for reading, and allocate any memory
- * needed.
- */
-PNG_FUNCTION(png_structp,PNGAPI
-png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
- png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED)
-{
-#endif /* PNG_USER_MEM_SUPPORTED */
-
-#ifdef PNG_SETJMP_SUPPORTED
- volatile
-#endif
- png_structp png_ptr;
- volatile int png_cleanup_needed = 0;
-
-#ifdef PNG_SETJMP_SUPPORTED
-#ifdef USE_FAR_KEYWORD
- jmp_buf png_jmpbuf;
-#endif
-#endif
-
- int i;
-
- png_debug(1, "in png_create_read_struct");
-
-#ifdef PNG_USER_MEM_SUPPORTED
- png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
- malloc_fn, mem_ptr);
-#else
- png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
-#endif
- if (png_ptr == NULL)
- return (NULL);
-
- /* Added at libpng-1.2.6 */
-#ifdef PNG_USER_LIMITS_SUPPORTED
- png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
- png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
-
-# ifdef PNG_USER_CHUNK_CACHE_MAX
- /* Added at libpng-1.2.43 and 1.4.0 */
- png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX;
-# endif
-
-# ifdef PNG_SET_USER_CHUNK_MALLOC_MAX
- /* Added at libpng-1.2.43 and 1.4.1 */
- png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX;
-# endif
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
-/* Applications that neglect to set up their own setjmp() and then
- encounter a png_error() will longjmp here. Since the jmpbuf is
- then meaningless we abort instead of returning. */
-#ifdef USE_FAR_KEYWORD
- if (setjmp(png_jmpbuf))
-#else
- if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */
-#endif
- PNG_ABORT();
-#ifdef USE_FAR_KEYWORD
- png_memcpy(png_jmpbuf(png_ptr), png_jmpbuf, png_sizeof(jmp_buf));
-#endif
-#endif /* PNG_SETJMP_SUPPORTED */
-
-#ifdef PNG_USER_MEM_SUPPORTED
- png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
-#endif
-
- png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
-
- if (user_png_ver)
- {
- i = 0;
-
- do
- {
- if (user_png_ver[i] != png_libpng_ver[i])
- png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
- } while (png_libpng_ver[i++]);
- }
-
- else
- png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
-
-
- if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
- {
- /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
- * we must recompile any applications that use any older library version.
- * For versions after libpng 1.0, we will be compatible, so we need
- * only check the first digit.
- */
- if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
- (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
- (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
- {
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- char msg[80];
- if (user_png_ver)
- {
- png_snprintf2(msg, 80,
- "Application built with libpng-%.20s"
- " but running with %.20s",
- user_png_ver,
- png_libpng_ver);
- png_warning(png_ptr, msg);
- }
-#else
- png_warning(png_ptr,
- "Incompatible libpng version in application and library");
-#endif
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- png_ptr->flags = 0;
-#endif
-
- png_cleanup_needed = 1;
- }
- }
-
- if (!png_cleanup_needed)
- {
- /* Initialize zbuf - compression buffer */
- png_ptr->zbuf_size = PNG_ZBUF_SIZE;
- png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size);
-
- if (png_ptr->zbuf == NULL)
- png_cleanup_needed = 1;
- }
-
- png_ptr->zstream.zalloc = png_zalloc;
- png_ptr->zstream.zfree = png_zfree;
- png_ptr->zstream.opaque = (voidpf)png_ptr;
-
- if (!png_cleanup_needed)
- {
- switch (inflateInit(&png_ptr->zstream))
- {
- case Z_OK:
- break; /* Do nothing */
-
- case Z_MEM_ERROR:
- png_warning(png_ptr, "zlib memory error");
- png_cleanup_needed = 1;
- break;
-
- case Z_STREAM_ERROR:
- png_warning(png_ptr, "zlib stream error");
- png_cleanup_needed = 1;
- break;
-
- case Z_VERSION_ERROR:
- png_warning(png_ptr, "zlib version error");
- png_cleanup_needed = 1;
- break;
-
- default: png_warning(png_ptr, "Unknown zlib error");
- png_cleanup_needed = 1;
- }
- }
-
- if (png_cleanup_needed)
- {
- /* Clean up PNG structure and deallocate any memory. */
- png_free(png_ptr, png_ptr->zbuf);
- png_ptr->zbuf = NULL;
-#ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2((png_voidp)png_ptr,
- (png_free_ptr)free_fn, (png_voidp)mem_ptr);
-#else
- png_destroy_struct((png_voidp)png_ptr);
-#endif
- return (NULL);
- }
-
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
-
- png_set_read_fn(png_ptr, NULL, NULL);
-
-
- return (png_ptr);
-}
-
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read the information before the actual image data. This has been
- * changed in v0.90 to allow reading a file that already has the magic
- * bytes read from the stream. You can tell libpng how many bytes have
- * been read from the beginning of the stream (up to the maximum of 8)
- * via png_set_sig_bytes(), and we will only check the remaining bytes
- * here. The application can then have access to the signature bytes we
- * read if it is determined that this isn't a valid PNG file.
- */
-void PNGAPI
-png_read_info(png_structp png_ptr, png_infop info_ptr)
-{
- png_debug(1, "in png_read_info");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- /* Read and check the PNG file signature. */
- png_read_sig(png_ptr, info_ptr);
-
- for (;;)
- {
- PNG_IHDR;
- PNG_IDAT;
- PNG_IEND;
- PNG_PLTE;
-#ifdef PNG_READ_bKGD_SUPPORTED
- PNG_bKGD;
-#endif
-#ifdef PNG_READ_cHRM_SUPPORTED
- PNG_cHRM;
-#endif
-#ifdef PNG_READ_gAMA_SUPPORTED
- PNG_gAMA;
-#endif
-#ifdef PNG_READ_hIST_SUPPORTED
- PNG_hIST;
-#endif
-#ifdef PNG_READ_iCCP_SUPPORTED
- PNG_iCCP;
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- PNG_iTXt;
-#endif
-#ifdef PNG_READ_oFFs_SUPPORTED
- PNG_oFFs;
-#endif
-#ifdef PNG_READ_pCAL_SUPPORTED
- PNG_pCAL;
-#endif
-#ifdef PNG_READ_pHYs_SUPPORTED
- PNG_pHYs;
-#endif
-#ifdef PNG_READ_sBIT_SUPPORTED
- PNG_sBIT;
-#endif
-#ifdef PNG_READ_sCAL_SUPPORTED
- PNG_sCAL;
-#endif
-#ifdef PNG_READ_sPLT_SUPPORTED
- PNG_sPLT;
-#endif
-#ifdef PNG_READ_sRGB_SUPPORTED
- PNG_sRGB;
-#endif
-#ifdef PNG_READ_tEXt_SUPPORTED
- PNG_tEXt;
-#endif
-#ifdef PNG_READ_tIME_SUPPORTED
- PNG_tIME;
-#endif
-#ifdef PNG_READ_tRNS_SUPPORTED
- PNG_tRNS;
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- PNG_zTXt;
-#endif
- png_uint_32 length = png_read_chunk_header(png_ptr);
- PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
-
- /* This should be a binary subdivision search or a hash for
- * matching the chunk name rather than a linear search.
- */
- if (!png_memcmp(chunk_name, png_IDAT, 4))
- if (png_ptr->mode & PNG_AFTER_IDAT)
- png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
-
- if (!png_memcmp(chunk_name, png_IHDR, 4))
- png_handle_IHDR(png_ptr, info_ptr, length);
-
- else if (!png_memcmp(chunk_name, png_IEND, 4))
- png_handle_IEND(png_ptr, info_ptr, length);
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- else if (png_handle_as_unknown(png_ptr, chunk_name))
- {
- if (!png_memcmp(chunk_name, png_IDAT, 4))
- png_ptr->mode |= PNG_HAVE_IDAT;
-
- png_handle_unknown(png_ptr, info_ptr, length);
-
- if (!png_memcmp(chunk_name, png_PLTE, 4))
- png_ptr->mode |= PNG_HAVE_PLTE;
-
- else if (!png_memcmp(chunk_name, png_IDAT, 4))
- {
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before IDAT");
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
- png_error(png_ptr, "Missing PLTE before IDAT");
-
- break;
- }
- }
-#endif
- else if (!png_memcmp(chunk_name, png_PLTE, 4))
- png_handle_PLTE(png_ptr, info_ptr, length);
-
- else if (!png_memcmp(chunk_name, png_IDAT, 4))
- {
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before IDAT");
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
- png_error(png_ptr, "Missing PLTE before IDAT");
-
- png_ptr->idat_size = length;
- png_ptr->mode |= PNG_HAVE_IDAT;
- break;
- }
-
-#ifdef PNG_READ_bKGD_SUPPORTED
- else if (!png_memcmp(chunk_name, png_bKGD, 4))
- png_handle_bKGD(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_cHRM_SUPPORTED
- else if (!png_memcmp(chunk_name, png_cHRM, 4))
- png_handle_cHRM(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_gAMA_SUPPORTED
- else if (!png_memcmp(chunk_name, png_gAMA, 4))
- png_handle_gAMA(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_hIST_SUPPORTED
- else if (!png_memcmp(chunk_name, png_hIST, 4))
- png_handle_hIST(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_oFFs_SUPPORTED
- else if (!png_memcmp(chunk_name, png_oFFs, 4))
- png_handle_oFFs(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_pCAL_SUPPORTED
- else if (!png_memcmp(chunk_name, png_pCAL, 4))
- png_handle_pCAL(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_sCAL_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sCAL, 4))
- png_handle_sCAL(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_pHYs_SUPPORTED
- else if (!png_memcmp(chunk_name, png_pHYs, 4))
- png_handle_pHYs(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_sBIT_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sBIT, 4))
- png_handle_sBIT(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_sRGB_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sRGB, 4))
- png_handle_sRGB(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_iCCP_SUPPORTED
- else if (!png_memcmp(chunk_name, png_iCCP, 4))
- png_handle_iCCP(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_sPLT_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sPLT, 4))
- png_handle_sPLT(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_tEXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tEXt, 4))
- png_handle_tEXt(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_tIME_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tIME, 4))
- png_handle_tIME(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_tRNS_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tRNS, 4))
- png_handle_tRNS(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_zTXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_zTXt, 4))
- png_handle_zTXt(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_iTXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_iTXt, 4))
- png_handle_iTXt(png_ptr, info_ptr, length);
-#endif
-
- else
- png_handle_unknown(png_ptr, info_ptr, length);
- }
-}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
-
-/* Optional call to update the users info_ptr structure */
-void PNGAPI
-png_read_update_info(png_structp png_ptr, png_infop info_ptr)
-{
- png_debug(1, "in png_read_update_info");
-
- if (png_ptr == NULL)
- return;
-
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
- png_read_start_row(png_ptr);
-
- else
- png_warning(png_ptr,
- "Ignoring extra png_read_update_info() call;"
- " row buffer not reallocated");
-
- png_read_transform_info(png_ptr, info_ptr);
-}
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Initialize palette, background, etc, after transformations
- * are set, but before any reading takes place. This allows
- * the user to obtain a gamma-corrected palette, for example.
- * If the user doesn't call this, we will do it ourselves.
- */
-void PNGAPI
-png_start_read_image(png_structp png_ptr)
-{
- png_debug(1, "in png_start_read_image");
-
- if (png_ptr == NULL)
- return;
-
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
- png_read_start_row(png_ptr);
- else
- png_warning(png_ptr,
- "Ignoring extra png_start_read_image() call;"
- " row buffer not reallocated");
-}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-void PNGAPI
-png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
-{
- PNG_IDAT;
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
- 0xff};
- PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
-#endif
- int ret;
-
- if (png_ptr == NULL)
- return;
-
- png_debug2(1, "in png_read_row (row %lu, pass %d)",
- (unsigned long)png_ptr->row_number, png_ptr->pass);
-
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
- png_read_start_row(png_ptr);
-
- if (png_ptr->row_number == 0 && png_ptr->pass == 0)
- {
- /* Check for transforms that have been set but were defined out */
-#if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED)
- if (png_ptr->transformations & PNG_INVERT_MONO)
- png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined");
-#endif
-
-#if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED)
- if (png_ptr->transformations & PNG_FILLER)
- png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined");
-#endif
-
-#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \
- !defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined");
-#endif
-
-#if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED)
- if (png_ptr->transformations & PNG_PACK)
- png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined");
-#endif
-
-#if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED)
- if (png_ptr->transformations & PNG_SHIFT)
- png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined");
-#endif
-
-#if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED)
- if (png_ptr->transformations & PNG_BGR)
- png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined");
-#endif
-
-#if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_SWAP_BYTES)
- png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined");
-#endif
- }
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- /* If interlaced and we do not need a new row, combine row and return */
- if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
- {
- switch (png_ptr->pass)
- {
- case 0:
- if (png_ptr->row_number & 0x07)
- {
- if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
- png_read_finish_row(png_ptr);
- return;
- }
- break;
-
- case 1:
- if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
- {
- if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
-
- png_read_finish_row(png_ptr);
- return;
- }
- break;
-
- case 2:
- if ((png_ptr->row_number & 0x07) != 4)
- {
- if (dsp_row != NULL && (png_ptr->row_number & 4))
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
-
- png_read_finish_row(png_ptr);
- return;
- }
- break;
-
- case 3:
- if ((png_ptr->row_number & 3) || png_ptr->width < 3)
- {
- if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
-
- png_read_finish_row(png_ptr);
- return;
- }
- break;
-
- case 4:
- if ((png_ptr->row_number & 3) != 2)
- {
- if (dsp_row != NULL && (png_ptr->row_number & 2))
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
-
- png_read_finish_row(png_ptr);
- return;
- }
- break;
- case 5:
- if ((png_ptr->row_number & 1) || png_ptr->width < 2)
- {
- if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
-
- png_read_finish_row(png_ptr);
- return;
- }
- break;
-
- default:
- case 6:
- if (!(png_ptr->row_number & 1))
- {
- png_read_finish_row(png_ptr);
- return;
- }
- break;
- }
- }
-#endif
-
- if (!(png_ptr->mode & PNG_HAVE_IDAT))
- png_error(png_ptr, "Invalid attempt to read row data");
-
- png_ptr->zstream.next_out = png_ptr->row_buf;
- png_ptr->zstream.avail_out =
- (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth,
- png_ptr->iwidth) + 1);
-
- do
- {
- if (!(png_ptr->zstream.avail_in))
- {
- while (!png_ptr->idat_size)
- {
- png_crc_finish(png_ptr, 0);
-
- png_ptr->idat_size = png_read_chunk_header(png_ptr);
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- png_error(png_ptr, "Not enough image data");
- }
- png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_in = png_ptr->zbuf;
- if (png_ptr->zbuf_size > png_ptr->idat_size)
- png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size;
- png_crc_read(png_ptr, png_ptr->zbuf,
- (png_size_t)png_ptr->zstream.avail_in);
- png_ptr->idat_size -= png_ptr->zstream.avail_in;
- }
-
- ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
-
- if (ret == Z_STREAM_END)
- {
- if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in ||
- png_ptr->idat_size)
- png_benign_error(png_ptr, "Extra compressed data");
- png_ptr->mode |= PNG_AFTER_IDAT;
- png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
- break;
- }
-
- if (ret != Z_OK)
- png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg :
- "Decompression error");
-
- } while (png_ptr->zstream.avail_out);
-
- png_ptr->row_info.color_type = png_ptr->color_type;
- png_ptr->row_info.width = png_ptr->iwidth;
- png_ptr->row_info.channels = png_ptr->channels;
- png_ptr->row_info.bit_depth = png_ptr->bit_depth;
- png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
- png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
-
- if (png_ptr->row_buf[0])
- png_read_filter_row(png_ptr, &(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->prev_row + 1,
- (int)(png_ptr->row_buf[0]));
-
- png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
- {
- /* Intrapixel differencing */
- png_do_read_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
- }
-#endif
-
-
- if (png_ptr->transformations)
- png_do_read_transformations(png_ptr);
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- /* Blow up interlaced rows to full size */
- if (png_ptr->interlaced &&
- (png_ptr->transformations & PNG_INTERLACE))
- {
- if (png_ptr->pass < 6)
- /* Old interface (pre-1.0.9):
- * png_do_read_interlace(&(png_ptr->row_info),
- * png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
- */
- png_do_read_interlace(png_ptr);
-
- if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row, png_pass_dsp_mask[png_ptr->pass]);
-
- if (row != NULL)
- png_combine_row(png_ptr, row, png_pass_mask[png_ptr->pass]);
- }
-
- else
-#endif
- {
- if (row != NULL)
- png_combine_row(png_ptr, row, 0xff);
-
- if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row, 0xff);
- }
- png_read_finish_row(png_ptr);
-
- if (png_ptr->read_row_fn != NULL)
- (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
-}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read one or more rows of image data. If the image is interlaced,
- * and png_set_interlace_handling() has been called, the rows need to
- * contain the contents of the rows from the previous pass. If the
- * image has alpha or transparency, and png_handle_alpha()[*] has been
- * called, the rows contents must be initialized to the contents of the
- * screen.
- *
- * "row" holds the actual image, and pixels are placed in it
- * as they arrive. If the image is displayed after each pass, it will
- * appear to "sparkle" in. "display_row" can be used to display a
- * "chunky" progressive image, with finer detail added as it becomes
- * available. If you do not want this "chunky" display, you may pass
- * NULL for display_row. If you do not want the sparkle display, and
- * you have not called png_handle_alpha(), you may pass NULL for rows.
- * If you have called png_handle_alpha(), and the image has either an
- * alpha channel or a transparency chunk, you must provide a buffer for
- * rows. In this case, you do not have to provide a display_row buffer
- * also, but you may. If the image is not interlaced, or if you have
- * not called png_set_interlace_handling(), the display_row buffer will
- * be ignored, so pass NULL to it.
- *
- * [*] png_handle_alpha() does not exist yet, as of this version of libpng
- */
-
-void PNGAPI
-png_read_rows(png_structp png_ptr, png_bytepp row,
- png_bytepp display_row, png_uint_32 num_rows)
-{
- png_uint_32 i;
- png_bytepp rp;
- png_bytepp dp;
-
- png_debug(1, "in png_read_rows");
-
- if (png_ptr == NULL)
- return;
-
- rp = row;
- dp = display_row;
- if (rp != NULL && dp != NULL)
- for (i = 0; i < num_rows; i++)
- {
- png_bytep rptr = *rp++;
- png_bytep dptr = *dp++;
-
- png_read_row(png_ptr, rptr, dptr);
- }
-
- else if (rp != NULL)
- for (i = 0; i < num_rows; i++)
- {
- png_bytep rptr = *rp;
- png_read_row(png_ptr, rptr, NULL);
- rp++;
- }
-
- else if (dp != NULL)
- for (i = 0; i < num_rows; i++)
- {
- png_bytep dptr = *dp;
- png_read_row(png_ptr, NULL, dptr);
- dp++;
- }
-}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read the entire image. If the image has an alpha channel or a tRNS
- * chunk, and you have called png_handle_alpha()[*], you will need to
- * initialize the image to the current image that PNG will be overlaying.
- * We set the num_rows again here, in case it was incorrectly set in
- * png_read_start_row() by a call to png_read_update_info() or
- * png_start_read_image() if png_set_interlace_handling() wasn't called
- * prior to either of these functions like it should have been. You can
- * only call this function once. If you desire to have an image for
- * each pass of a interlaced image, use png_read_rows() instead.
- *
- * [*] png_handle_alpha() does not exist yet, as of this version of libpng
- */
-void PNGAPI
-png_read_image(png_structp png_ptr, png_bytepp image)
-{
- png_uint_32 i, image_height;
- int pass, j;
- png_bytepp rp;
-
- png_debug(1, "in png_read_image");
-
- if (png_ptr == NULL)
- return;
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
- {
- pass = png_set_interlace_handling(png_ptr);
- /* And make sure transforms are initialized. */
- png_start_read_image(png_ptr);
- }
- else
- {
- if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE))
- {
- /* Caller called png_start_read_image or png_read_update_info without
- * first turning on the PNG_INTERLACE transform. We can fix this here,
- * but the caller should do it!
- */
- png_warning(png_ptr, "Interlace handling should be turned on when "
- "using png_read_image");
- /* Make sure this is set correctly */
- png_ptr->num_rows = png_ptr->height;
- }
-
- /* Obtain the pass number, which also turns on the PNG_INTERLACE flag in
- * the above error case.
- */
- pass = png_set_interlace_handling(png_ptr);
- }
-#else
- if (png_ptr->interlaced)
- png_error(png_ptr,
- "Cannot read interlaced image -- interlace handler disabled");
-
- pass = 1;
-#endif
-
- image_height=png_ptr->height;
-
- for (j = 0; j < pass; j++)
- {
- rp = image;
- for (i = 0; i < image_height; i++)
- {
- png_read_row(png_ptr, *rp, NULL);
- rp++;
- }
- }
-}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-/* Read the end of the PNG file. Will not read past the end of the
- * file, will verify the end is accurate, and will read any comments
- * or time information at the end of the file, if info is not NULL.
- */
-void PNGAPI
-png_read_end(png_structp png_ptr, png_infop info_ptr)
-{
- png_debug(1, "in png_read_end");
-
- if (png_ptr == NULL)
- return;
-
- png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
-
- do
- {
- PNG_IHDR;
- PNG_IDAT;
- PNG_IEND;
- PNG_PLTE;
-#ifdef PNG_READ_bKGD_SUPPORTED
- PNG_bKGD;
-#endif
-#ifdef PNG_READ_cHRM_SUPPORTED
- PNG_cHRM;
-#endif
-#ifdef PNG_READ_gAMA_SUPPORTED
- PNG_gAMA;
-#endif
-#ifdef PNG_READ_hIST_SUPPORTED
- PNG_hIST;
-#endif
-#ifdef PNG_READ_iCCP_SUPPORTED
- PNG_iCCP;
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- PNG_iTXt;
-#endif
-#ifdef PNG_READ_oFFs_SUPPORTED
- PNG_oFFs;
-#endif
-#ifdef PNG_READ_pCAL_SUPPORTED
- PNG_pCAL;
-#endif
-#ifdef PNG_READ_pHYs_SUPPORTED
- PNG_pHYs;
-#endif
-#ifdef PNG_READ_sBIT_SUPPORTED
- PNG_sBIT;
-#endif
-#ifdef PNG_READ_sCAL_SUPPORTED
- PNG_sCAL;
-#endif
-#ifdef PNG_READ_sPLT_SUPPORTED
- PNG_sPLT;
-#endif
-#ifdef PNG_READ_sRGB_SUPPORTED
- PNG_sRGB;
-#endif
-#ifdef PNG_READ_tEXt_SUPPORTED
- PNG_tEXt;
-#endif
-#ifdef PNG_READ_tIME_SUPPORTED
- PNG_tIME;
-#endif
-#ifdef PNG_READ_tRNS_SUPPORTED
- PNG_tRNS;
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- PNG_zTXt;
-#endif
- png_uint_32 length = png_read_chunk_header(png_ptr);
- PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
-
- if (!png_memcmp(chunk_name, png_IHDR, 4))
- png_handle_IHDR(png_ptr, info_ptr, length);
-
- else if (!png_memcmp(chunk_name, png_IEND, 4))
- png_handle_IEND(png_ptr, info_ptr, length);
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- else if (png_handle_as_unknown(png_ptr, chunk_name))
- {
- if (!png_memcmp(chunk_name, png_IDAT, 4))
- {
- if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
- png_benign_error(png_ptr, "Too many IDATs found");
- }
- png_handle_unknown(png_ptr, info_ptr, length);
- if (!png_memcmp(chunk_name, png_PLTE, 4))
- png_ptr->mode |= PNG_HAVE_PLTE;
- }
-#endif
-
- else if (!png_memcmp(chunk_name, png_IDAT, 4))
- {
- /* Zero length IDATs are legal after the last IDAT has been
- * read, but not after other chunks have been read.
- */
- if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
- png_benign_error(png_ptr, "Too many IDATs found");
-
- png_crc_finish(png_ptr, length);
- }
- else if (!png_memcmp(chunk_name, png_PLTE, 4))
- png_handle_PLTE(png_ptr, info_ptr, length);
-
-#ifdef PNG_READ_bKGD_SUPPORTED
- else if (!png_memcmp(chunk_name, png_bKGD, 4))
- png_handle_bKGD(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_cHRM_SUPPORTED
- else if (!png_memcmp(chunk_name, png_cHRM, 4))
- png_handle_cHRM(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_gAMA_SUPPORTED
- else if (!png_memcmp(chunk_name, png_gAMA, 4))
- png_handle_gAMA(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_hIST_SUPPORTED
- else if (!png_memcmp(chunk_name, png_hIST, 4))
- png_handle_hIST(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_oFFs_SUPPORTED
- else if (!png_memcmp(chunk_name, png_oFFs, 4))
- png_handle_oFFs(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_pCAL_SUPPORTED
- else if (!png_memcmp(chunk_name, png_pCAL, 4))
- png_handle_pCAL(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_sCAL_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sCAL, 4))
- png_handle_sCAL(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_pHYs_SUPPORTED
- else if (!png_memcmp(chunk_name, png_pHYs, 4))
- png_handle_pHYs(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_sBIT_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sBIT, 4))
- png_handle_sBIT(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_sRGB_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sRGB, 4))
- png_handle_sRGB(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_iCCP_SUPPORTED
- else if (!png_memcmp(chunk_name, png_iCCP, 4))
- png_handle_iCCP(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_sPLT_SUPPORTED
- else if (!png_memcmp(chunk_name, png_sPLT, 4))
- png_handle_sPLT(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_tEXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tEXt, 4))
- png_handle_tEXt(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_tIME_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tIME, 4))
- png_handle_tIME(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_tRNS_SUPPORTED
- else if (!png_memcmp(chunk_name, png_tRNS, 4))
- png_handle_tRNS(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_zTXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_zTXt, 4))
- png_handle_zTXt(png_ptr, info_ptr, length);
-#endif
-
-#ifdef PNG_READ_iTXt_SUPPORTED
- else if (!png_memcmp(chunk_name, png_iTXt, 4))
- png_handle_iTXt(png_ptr, info_ptr, length);
-#endif
-
- else
- png_handle_unknown(png_ptr, info_ptr, length);
- } while (!(png_ptr->mode & PNG_HAVE_IEND));
-}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
-
-/* Free all memory used by the read */
-void PNGAPI
-png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
- png_infopp end_info_ptr_ptr)
-{
- png_structp png_ptr = NULL;
- png_infop info_ptr = NULL, end_info_ptr = NULL;
-#ifdef PNG_USER_MEM_SUPPORTED
- png_free_ptr free_fn = NULL;
- png_voidp mem_ptr = NULL;
-#endif
-
- png_debug(1, "in png_destroy_read_struct");
-
- if (png_ptr_ptr != NULL)
- png_ptr = *png_ptr_ptr;
- if (png_ptr == NULL)
- return;
-
-#ifdef PNG_USER_MEM_SUPPORTED
- free_fn = png_ptr->free_fn;
- mem_ptr = png_ptr->mem_ptr;
-#endif
-
- if (info_ptr_ptr != NULL)
- info_ptr = *info_ptr_ptr;
-
- if (end_info_ptr_ptr != NULL)
- end_info_ptr = *end_info_ptr_ptr;
-
- png_read_destroy(png_ptr, info_ptr, end_info_ptr);
-
- if (info_ptr != NULL)
- {
-#ifdef PNG_TEXT_SUPPORTED
- png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1);
-#endif
-
-#ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
- (png_voidp)mem_ptr);
-#else
- png_destroy_struct((png_voidp)info_ptr);
-#endif
- *info_ptr_ptr = NULL;
- }
-
- if (end_info_ptr != NULL)
- {
-#ifdef PNG_READ_TEXT_SUPPORTED
- png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
-#endif
-#ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn,
- (png_voidp)mem_ptr);
-#else
- png_destroy_struct((png_voidp)end_info_ptr);
-#endif
- *end_info_ptr_ptr = NULL;
- }
-
- if (png_ptr != NULL)
- {
-#ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
- (png_voidp)mem_ptr);
-#else
- png_destroy_struct((png_voidp)png_ptr);
-#endif
- *png_ptr_ptr = NULL;
- }
-}
-
-/* Free all memory used by the read (old method) */
-void /* PRIVATE */
-png_read_destroy(png_structp png_ptr, png_infop info_ptr,
- png_infop end_info_ptr)
-{
-#ifdef PNG_SETJMP_SUPPORTED
- jmp_buf tmp_jmp;
-#endif
- png_error_ptr error_fn;
- png_error_ptr warning_fn;
- png_voidp error_ptr;
-#ifdef PNG_USER_MEM_SUPPORTED
- png_free_ptr free_fn;
-#endif
-
- png_debug(1, "in png_read_destroy");
-
- if (info_ptr != NULL)
- png_info_destroy(png_ptr, info_ptr);
-
- if (end_info_ptr != NULL)
- png_info_destroy(png_ptr, end_info_ptr);
-
- png_free(png_ptr, png_ptr->zbuf);
- png_free(png_ptr, png_ptr->big_row_buf);
- png_free(png_ptr, png_ptr->prev_row);
- png_free(png_ptr, png_ptr->chunkdata);
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
- png_free(png_ptr, png_ptr->palette_lookup);
- png_free(png_ptr, png_ptr->quantize_index);
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- png_free(png_ptr, png_ptr->gamma_table);
-#endif
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- png_free(png_ptr, png_ptr->gamma_from_1);
- png_free(png_ptr, png_ptr->gamma_to_1);
-#endif
-
- if (png_ptr->free_me & PNG_FREE_PLTE)
- png_zfree(png_ptr, png_ptr->palette);
- png_ptr->free_me &= ~PNG_FREE_PLTE;
-
-#if defined(PNG_tRNS_SUPPORTED) || \
- defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->free_me & PNG_FREE_TRNS)
- png_free(png_ptr, png_ptr->trans_alpha);
- png_ptr->free_me &= ~PNG_FREE_TRNS;
-#endif
-
-#ifdef PNG_READ_hIST_SUPPORTED
- if (png_ptr->free_me & PNG_FREE_HIST)
- png_free(png_ptr, png_ptr->hist);
- png_ptr->free_me &= ~PNG_FREE_HIST;
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (png_ptr->gamma_16_table != NULL)
- {
- int i;
- int istop = (1 << (8 - png_ptr->gamma_shift));
- for (i = 0; i < istop; i++)
- {
- png_free(png_ptr, png_ptr->gamma_16_table[i]);
- }
- png_free(png_ptr, png_ptr->gamma_16_table);
- }
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- if (png_ptr->gamma_16_from_1 != NULL)
- {
- int i;
- int istop = (1 << (8 - png_ptr->gamma_shift));
- for (i = 0; i < istop; i++)
- {
- png_free(png_ptr, png_ptr->gamma_16_from_1[i]);
- }
- png_free(png_ptr, png_ptr->gamma_16_from_1);
- }
- if (png_ptr->gamma_16_to_1 != NULL)
- {
- int i;
- int istop = (1 << (8 - png_ptr->gamma_shift));
- for (i = 0; i < istop; i++)
- {
- png_free(png_ptr, png_ptr->gamma_16_to_1[i]);
- }
- png_free(png_ptr, png_ptr->gamma_16_to_1);
- }
-#endif
-#endif
-
-#ifdef PNG_TIME_RFC1123_SUPPORTED
- png_free(png_ptr, png_ptr->time_buffer);
-#endif
-
- inflateEnd(&png_ptr->zstream);
-
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
- png_free(png_ptr, png_ptr->save_buffer);
-#endif
-
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-#ifdef PNG_TEXT_SUPPORTED
- png_free(png_ptr, png_ptr->current_text);
-#endif /* PNG_TEXT_SUPPORTED */
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
-
- /* Save the important info out of the png_struct, in case it is
- * being used again.
- */
-#ifdef PNG_SETJMP_SUPPORTED
- png_memcpy(tmp_jmp, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
-#endif
-
- error_fn = png_ptr->error_fn;
- warning_fn = png_ptr->warning_fn;
- error_ptr = png_ptr->error_ptr;
-#ifdef PNG_USER_MEM_SUPPORTED
- free_fn = png_ptr->free_fn;
-#endif
-
- png_memset(png_ptr, 0, png_sizeof(png_struct));
-
- png_ptr->error_fn = error_fn;
- png_ptr->warning_fn = warning_fn;
- png_ptr->error_ptr = error_ptr;
-#ifdef PNG_USER_MEM_SUPPORTED
- png_ptr->free_fn = free_fn;
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
- png_memcpy(png_ptr->png_jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
-#endif
-
-}
-
-void PNGAPI
-png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
-{
- if (png_ptr == NULL)
- return;
-
- png_ptr->read_row_fn = read_row_fn;
-}
-
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-#ifdef PNG_INFO_IMAGE_SUPPORTED
-void PNGAPI
-png_read_png(png_structp png_ptr, png_infop info_ptr,
- int transforms,
- voidp params)
-{
- int row;
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- /* png_read_info() gives us all of the information from the
- * PNG file before the first IDAT (image data chunk).
- */
- png_read_info(png_ptr, info_ptr);
- if (info_ptr->height > PNG_UINT_32_MAX/png_sizeof(png_bytep))
- png_error(png_ptr, "Image is too high to process with png_read_png()");
-
- /* -------------- image transformations start here ------------------- */
-
-#ifdef PNG_READ_16_TO_8_SUPPORTED
- /* Tell libpng to strip 16 bit/color files down to 8 bits per color.
- */
- if (transforms & PNG_TRANSFORM_STRIP_16)
- png_set_strip_16(png_ptr);
-#endif
-
-#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
- /* Strip alpha bytes from the input data without combining with
- * the background (not recommended).
- */
- if (transforms & PNG_TRANSFORM_STRIP_ALPHA)
- png_set_strip_alpha(png_ptr);
-#endif
-
-#if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED)
- /* Extract multiple pixels with bit depths of 1, 2, or 4 from a single
- * byte into separate bytes (useful for paletted and grayscale images).
- */
- if (transforms & PNG_TRANSFORM_PACKING)
- png_set_packing(png_ptr);
-#endif
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- /* Change the order of packed pixels to least significant bit first
- * (not useful if you are using png_set_packing).
- */
- if (transforms & PNG_TRANSFORM_PACKSWAP)
- png_set_packswap(png_ptr);
-#endif
-
-#ifdef PNG_READ_EXPAND_SUPPORTED
- /* Expand paletted colors into true RGB triplets
- * Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel
- * Expand paletted or RGB images with transparency to full alpha
- * channels so the data will be available as RGBA quartets.
- */
- if (transforms & PNG_TRANSFORM_EXPAND)
- if ((png_ptr->bit_depth < 8) ||
- (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
- (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
- png_set_expand(png_ptr);
-#endif
-
- /* We don't handle background color or gamma transformation or quantizing.
- */
-
-#ifdef PNG_READ_INVERT_SUPPORTED
- /* Invert monochrome files to have 0 as white and 1 as black
- */
- if (transforms & PNG_TRANSFORM_INVERT_MONO)
- png_set_invert_mono(png_ptr);
-#endif
-
-#ifdef PNG_READ_SHIFT_SUPPORTED
- /* If you want to shift the pixel values from the range [0,255] or
- * [0,65535] to the original [0,7] or [0,31], or whatever range the
- * colors were originally in:
- */
- if ((transforms & PNG_TRANSFORM_SHIFT)
- && png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT))
- {
- png_color_8p sig_bit;
-
- png_get_sBIT(png_ptr, info_ptr, &sig_bit);
- png_set_shift(png_ptr, sig_bit);
- }
-#endif
-
-#ifdef PNG_READ_BGR_SUPPORTED
- /* Flip the RGB pixels to BGR (or RGBA to BGRA) */
- if (transforms & PNG_TRANSFORM_BGR)
- png_set_bgr(png_ptr);
-#endif
-
-#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
- /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */
- if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
- png_set_swap_alpha(png_ptr);
-#endif
-
-#ifdef PNG_READ_SWAP_SUPPORTED
- /* Swap bytes of 16 bit files to least significant byte first */
- if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
- png_set_swap(png_ptr);
-#endif
-
-/* Added at libpng-1.2.41 */
-#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
- /* Invert the alpha channel from opacity to transparency */
- if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
- png_set_invert_alpha(png_ptr);
-#endif
-
-/* Added at libpng-1.2.41 */
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
- /* Expand grayscale image to RGB */
- if (transforms & PNG_TRANSFORM_GRAY_TO_RGB)
- png_set_gray_to_rgb(png_ptr);
-#endif
-
- /* We don't handle adding filler bytes */
-
- /* We use png_read_image and rely on that for interlace handling, but we also
- * call png_read_update_info therefore must turn on interlace handling now:
- */
- (void)png_set_interlace_handling(png_ptr);
-
- /* Optional call to gamma correct and add the background to the palette
- * and update info structure. REQUIRED if you are expecting libpng to
- * update the palette for you (i.e., you selected such a transform above).
- */
- png_read_update_info(png_ptr, info_ptr);
-
- /* -------------- image transformations end here ------------------- */
-
- png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
- if (info_ptr->row_pointers == NULL)
- {
- png_uint_32 iptr;
-
- info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
- info_ptr->height * png_sizeof(png_bytep));
- for (iptr=0; iptr<info_ptr->height; iptr++)
- info_ptr->row_pointers[iptr] = NULL;
-
- info_ptr->free_me |= PNG_FREE_ROWS;
-
- for (row = 0; row < (int)info_ptr->height; row++)
- info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr,
- png_get_rowbytes(png_ptr, info_ptr));
- }
-
- png_read_image(png_ptr, info_ptr->row_pointers);
- info_ptr->valid |= PNG_INFO_IDAT;
-
- /* Read rest of file, and get additional chunks in info_ptr - REQUIRED */
- png_read_end(png_ptr, info_ptr);
-
- PNG_UNUSED(transforms) /* Quiet compiler warnings */
- PNG_UNUSED(params)
-
-}
-#endif /* PNG_INFO_IMAGE_SUPPORTED */
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED */
+++ /dev/null
-
-/* pngrio.c - functions for data input
- *
- * Last changed in libpng 1.5.0 [January 6, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * This file provides a location for all input. Users who need
- * special handling are expected to write a function that has the same
- * arguments as this and performs a similar function, but that possibly
- * has a different input method. Note that you shouldn't change this
- * function, but rather write a replacement function and then make
- * libpng use it at run time with png_set_read_fn(...).
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_READ_SUPPORTED
-
-/* Read the data from whatever input you are using. The default routine
- * reads from a file pointer. Note that this routine sometimes gets called
- * with very small lengths, so you should implement some kind of simple
- * buffering if you are using unbuffered reads. This should never be asked
- * to read more then 64K on a 16 bit machine.
- */
-void /* PRIVATE */
-png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
-{
- png_debug1(4, "reading %d bytes", (int)length);
-
- if (png_ptr->read_data_fn != NULL)
- (*(png_ptr->read_data_fn))(png_ptr, data, length);
-
- else
- png_error(png_ptr, "Call to NULL read function");
-}
-
-#ifdef PNG_STDIO_SUPPORTED
-/* This is the function that does the actual reading of data. If you are
- * not reading from a standard C stream, you should create a replacement
- * read_data function and use it at run time with png_set_read_fn(), rather
- * than changing the library.
- */
-# ifndef USE_FAR_KEYWORD
-void PNGCBAPI
-png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
-{
- png_size_t check;
-
- if (png_ptr == NULL)
- return;
-
- /* fread() returns 0 on error, so it is OK to store this in a png_size_t
- * instead of an int, which is what fread() actually returns.
- */
- check = fread(data, 1, length, (png_FILE_p)png_ptr->io_ptr);
-
- if (check != length)
- png_error(png_ptr, "Read Error");
-}
-# else
-/* This is the model-independent version. Since the standard I/O library
- can't handle far buffers in the medium and small models, we have to copy
- the data.
-*/
-
-#define NEAR_BUF_SIZE 1024
-#define MIN(a,b) (a <= b ? a : b)
-
-static void PNGCBAPI
-png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
-{
- png_size_t check;
- png_byte *n_data;
- png_FILE_p io_ptr;
-
- if (png_ptr == NULL)
- return;
-
- /* Check if data really is near. If so, use usual code. */
- n_data = (png_byte *)CVT_PTR_NOCHECK(data);
- io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
-
- if ((png_bytep)n_data == data)
- {
- check = fread(n_data, 1, length, io_ptr);
- }
-
- else
- {
- png_byte buf[NEAR_BUF_SIZE];
- png_size_t read, remaining, err;
- check = 0;
- remaining = length;
-
- do
- {
- read = MIN(NEAR_BUF_SIZE, remaining);
- err = fread(buf, 1, read, io_ptr);
- png_memcpy(data, buf, read); /* copy far buffer to near buffer */
-
- if (err != read)
- break;
-
- else
- check += err;
-
- data += read;
- remaining -= read;
- }
- while (remaining != 0);
- }
-
- if ((png_uint_32)check != (png_uint_32)length)
- png_error(png_ptr, "read Error");
-}
-# endif
-#endif
-
-/* This function allows the application to supply a new input function
- * for libpng if standard C streams aren't being used.
- *
- * This function takes as its arguments:
- *
- * png_ptr - pointer to a png input data structure
- *
- * io_ptr - pointer to user supplied structure containing info about
- * the input functions. May be NULL.
- *
- * read_data_fn - pointer to a new input function that takes as its
- * arguments a pointer to a png_struct, a pointer to
- * a location where input data can be stored, and a 32-bit
- * unsigned int that is the number of bytes to be read.
- * To exit and output any fatal error messages the new write
- * function should call png_error(png_ptr, "Error msg").
- * May be NULL, in which case libpng's default function will
- * be used.
- */
-void PNGAPI
-png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
- png_rw_ptr read_data_fn)
-{
- if (png_ptr == NULL)
- return;
-
- png_ptr->io_ptr = io_ptr;
-
-#ifdef PNG_STDIO_SUPPORTED
- if (read_data_fn != NULL)
- png_ptr->read_data_fn = read_data_fn;
-
- else
- png_ptr->read_data_fn = png_default_read_data;
-#else
- png_ptr->read_data_fn = read_data_fn;
-#endif
-
- /* It is an error to write to a read device */
- if (png_ptr->write_data_fn != NULL)
- {
- png_ptr->write_data_fn = NULL;
- png_warning(png_ptr,
- "Can't set both read_data_fn and write_data_fn in the"
- " same structure");
- }
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
- png_ptr->output_flush_fn = NULL;
-#endif
-}
-#endif /* PNG_READ_SUPPORTED */
+++ /dev/null
-
-/* pngrtran.c - transforms the data in a row for PNG readers
- *
- * Last changed in libpng 1.5.2 [March 31, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * This file contains functions optionally called by an application
- * in order to tell libpng how to handle data when reading a PNG.
- * Transformations that are used in both reading and writing are
- * in pngtrans.c.
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_READ_SUPPORTED
-
-/* Set the action on getting a CRC error for an ancillary or critical chunk. */
-void PNGAPI
-png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
-{
- png_debug(1, "in png_set_crc_action");
-
- if (png_ptr == NULL)
- return;
-
- /* Tell libpng how we react to CRC errors in critical chunks */
- switch (crit_action)
- {
- case PNG_CRC_NO_CHANGE: /* Leave setting as is */
- break;
-
- case PNG_CRC_WARN_USE: /* Warn/use data */
- png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
- png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE;
- break;
-
- case PNG_CRC_QUIET_USE: /* Quiet/use data */
- png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
- png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE |
- PNG_FLAG_CRC_CRITICAL_IGNORE;
- break;
-
- case PNG_CRC_WARN_DISCARD: /* Not a valid action for critical data */
- png_warning(png_ptr,
- "Can't discard critical data on CRC error");
- case PNG_CRC_ERROR_QUIT: /* Error/quit */
-
- case PNG_CRC_DEFAULT:
- default:
- png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
- break;
- }
-
- /* Tell libpng how we react to CRC errors in ancillary chunks */
- switch (ancil_action)
- {
- case PNG_CRC_NO_CHANGE: /* Leave setting as is */
- break;
-
- case PNG_CRC_WARN_USE: /* Warn/use data */
- png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
- png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE;
- break;
-
- case PNG_CRC_QUIET_USE: /* Quiet/use data */
- png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
- png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE |
- PNG_FLAG_CRC_ANCILLARY_NOWARN;
- break;
-
- case PNG_CRC_ERROR_QUIT: /* Error/quit */
- png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
- png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_NOWARN;
- break;
-
- case PNG_CRC_WARN_DISCARD: /* Warn/discard data */
-
- case PNG_CRC_DEFAULT:
- default:
- png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
- break;
- }
-}
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
-/* Handle alpha and tRNS via a background color */
-void PNGFAPI
-png_set_background_fixed(png_structp png_ptr,
- png_const_color_16p background_color, int background_gamma_code,
- int need_expand, png_fixed_point background_gamma)
-{
- png_debug(1, "in png_set_background_fixed");
-
- if (png_ptr == NULL)
- return;
-
- if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN)
- {
- png_warning(png_ptr, "Application must supply a known background gamma");
- return;
- }
-
- png_ptr->transformations |= PNG_BACKGROUND;
- png_memcpy(&(png_ptr->background), background_color,
- png_sizeof(png_color_16));
- png_ptr->background_gamma = background_gamma;
- png_ptr->background_gamma_type = (png_byte)(background_gamma_code);
- png_ptr->transformations |= (need_expand ? PNG_BACKGROUND_EXPAND : 0);
-}
-
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-void PNGAPI
-png_set_background(png_structp png_ptr,
- png_const_color_16p background_color, int background_gamma_code,
- int need_expand, double background_gamma)
-{
- png_set_background_fixed(png_ptr, background_color, background_gamma_code,
- need_expand, png_fixed(png_ptr, background_gamma, "png_set_background"));
-}
-# endif /* FLOATING_POINT */
-#endif /* READ_BACKGROUND */
-
-#ifdef PNG_READ_16_TO_8_SUPPORTED
-/* Strip 16 bit depth files to 8 bit depth */
-void PNGAPI
-png_set_strip_16(png_structp png_ptr)
-{
- png_debug(1, "in png_set_strip_16");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_16_TO_8;
- png_ptr->transformations &= ~PNG_EXPAND_16;
-}
-#endif
-
-#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
-void PNGAPI
-png_set_strip_alpha(png_structp png_ptr)
-{
- png_debug(1, "in png_set_strip_alpha");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_STRIP_ALPHA;
-}
-#endif
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
-/* Dither file to 8 bit. Supply a palette, the current number
- * of elements in the palette, the maximum number of elements
- * allowed, and a histogram if possible. If the current number
- * of colors is greater then the maximum number, the palette will be
- * modified to fit in the maximum number. "full_quantize" indicates
- * whether we need a quantizing cube set up for RGB images, or if we
- * simply are reducing the number of colors in a paletted image.
- */
-
-typedef struct png_dsort_struct
-{
- struct png_dsort_struct FAR * next;
- png_byte left;
- png_byte right;
-} png_dsort;
-typedef png_dsort FAR * png_dsortp;
-typedef png_dsort FAR * FAR * png_dsortpp;
-
-void PNGAPI
-png_set_quantize(png_structp png_ptr, png_colorp palette,
- int num_palette, int maximum_colors, png_const_uint_16p histogram,
- int full_quantize)
-{
- png_debug(1, "in png_set_quantize");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_QUANTIZE;
-
- if (!full_quantize)
- {
- int i;
-
- png_ptr->quantize_index = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(num_palette * png_sizeof(png_byte)));
- for (i = 0; i < num_palette; i++)
- png_ptr->quantize_index[i] = (png_byte)i;
- }
-
- if (num_palette > maximum_colors)
- {
- if (histogram != NULL)
- {
- /* This is easy enough, just throw out the least used colors.
- * Perhaps not the best solution, but good enough.
- */
-
- int i;
-
- /* Initialize an array to sort colors */
- png_ptr->quantize_sort = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(num_palette * png_sizeof(png_byte)));
-
- /* Initialize the quantize_sort array */
- for (i = 0; i < num_palette; i++)
- png_ptr->quantize_sort[i] = (png_byte)i;
-
- /* Find the least used palette entries by starting a
- * bubble sort, and running it until we have sorted
- * out enough colors. Note that we don't care about
- * sorting all the colors, just finding which are
- * least used.
- */
-
- for (i = num_palette - 1; i >= maximum_colors; i--)
- {
- int done; /* To stop early if the list is pre-sorted */
- int j;
-
- done = 1;
- for (j = 0; j < i; j++)
- {
- if (histogram[png_ptr->quantize_sort[j]]
- < histogram[png_ptr->quantize_sort[j + 1]])
- {
- png_byte t;
-
- t = png_ptr->quantize_sort[j];
- png_ptr->quantize_sort[j] = png_ptr->quantize_sort[j + 1];
- png_ptr->quantize_sort[j + 1] = t;
- done = 0;
- }
- }
-
- if (done)
- break;
- }
-
- /* Swap the palette around, and set up a table, if necessary */
- if (full_quantize)
- {
- int j = num_palette;
-
- /* Put all the useful colors within the max, but don't
- * move the others.
- */
- for (i = 0; i < maximum_colors; i++)
- {
- if ((int)png_ptr->quantize_sort[i] >= maximum_colors)
- {
- do
- j--;
- while ((int)png_ptr->quantize_sort[j] >= maximum_colors);
-
- palette[i] = palette[j];
- }
- }
- }
- else
- {
- int j = num_palette;
-
- /* Move all the used colors inside the max limit, and
- * develop a translation table.
- */
- for (i = 0; i < maximum_colors; i++)
- {
- /* Only move the colors we need to */
- if ((int)png_ptr->quantize_sort[i] >= maximum_colors)
- {
- png_color tmp_color;
-
- do
- j--;
- while ((int)png_ptr->quantize_sort[j] >= maximum_colors);
-
- tmp_color = palette[j];
- palette[j] = palette[i];
- palette[i] = tmp_color;
- /* Indicate where the color went */
- png_ptr->quantize_index[j] = (png_byte)i;
- png_ptr->quantize_index[i] = (png_byte)j;
- }
- }
-
- /* Find closest color for those colors we are not using */
- for (i = 0; i < num_palette; i++)
- {
- if ((int)png_ptr->quantize_index[i] >= maximum_colors)
- {
- int min_d, k, min_k, d_index;
-
- /* Find the closest color to one we threw out */
- d_index = png_ptr->quantize_index[i];
- min_d = PNG_COLOR_DIST(palette[d_index], palette[0]);
- for (k = 1, min_k = 0; k < maximum_colors; k++)
- {
- int d;
-
- d = PNG_COLOR_DIST(palette[d_index], palette[k]);
-
- if (d < min_d)
- {
- min_d = d;
- min_k = k;
- }
- }
- /* Point to closest color */
- png_ptr->quantize_index[i] = (png_byte)min_k;
- }
- }
- }
- png_free(png_ptr, png_ptr->quantize_sort);
- png_ptr->quantize_sort = NULL;
- }
- else
- {
- /* This is much harder to do simply (and quickly). Perhaps
- * we need to go through a median cut routine, but those
- * don't always behave themselves with only a few colors
- * as input. So we will just find the closest two colors,
- * and throw out one of them (chosen somewhat randomly).
- * [We don't understand this at all, so if someone wants to
- * work on improving it, be our guest - AED, GRP]
- */
- int i;
- int max_d;
- int num_new_palette;
- png_dsortp t;
- png_dsortpp hash;
-
- t = NULL;
-
- /* Initialize palette index arrays */
- png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(num_palette * png_sizeof(png_byte)));
- png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(num_palette * png_sizeof(png_byte)));
-
- /* Initialize the sort array */
- for (i = 0; i < num_palette; i++)
- {
- png_ptr->index_to_palette[i] = (png_byte)i;
- png_ptr->palette_to_index[i] = (png_byte)i;
- }
-
- hash = (png_dsortpp)png_calloc(png_ptr, (png_uint_32)(769 *
- png_sizeof(png_dsortp)));
-
- num_new_palette = num_palette;
-
- /* Initial wild guess at how far apart the farthest pixel
- * pair we will be eliminating will be. Larger
- * numbers mean more areas will be allocated, Smaller
- * numbers run the risk of not saving enough data, and
- * having to do this all over again.
- *
- * I have not done extensive checking on this number.
- */
- max_d = 96;
-
- while (num_new_palette > maximum_colors)
- {
- for (i = 0; i < num_new_palette - 1; i++)
- {
- int j;
-
- for (j = i + 1; j < num_new_palette; j++)
- {
- int d;
-
- d = PNG_COLOR_DIST(palette[i], palette[j]);
-
- if (d <= max_d)
- {
-
- t = (png_dsortp)png_malloc_warn(png_ptr,
- (png_uint_32)(png_sizeof(png_dsort)));
-
- if (t == NULL)
- break;
-
- t->next = hash[d];
- t->left = (png_byte)i;
- t->right = (png_byte)j;
- hash[d] = t;
- }
- }
- if (t == NULL)
- break;
- }
-
- if (t != NULL)
- for (i = 0; i <= max_d; i++)
- {
- if (hash[i] != NULL)
- {
- png_dsortp p;
-
- for (p = hash[i]; p; p = p->next)
- {
- if ((int)png_ptr->index_to_palette[p->left]
- < num_new_palette &&
- (int)png_ptr->index_to_palette[p->right]
- < num_new_palette)
- {
- int j, next_j;
-
- if (num_new_palette & 0x01)
- {
- j = p->left;
- next_j = p->right;
- }
- else
- {
- j = p->right;
- next_j = p->left;
- }
-
- num_new_palette--;
- palette[png_ptr->index_to_palette[j]]
- = palette[num_new_palette];
- if (!full_quantize)
- {
- int k;
-
- for (k = 0; k < num_palette; k++)
- {
- if (png_ptr->quantize_index[k] ==
- png_ptr->index_to_palette[j])
- png_ptr->quantize_index[k] =
- png_ptr->index_to_palette[next_j];
-
- if ((int)png_ptr->quantize_index[k] ==
- num_new_palette)
- png_ptr->quantize_index[k] =
- png_ptr->index_to_palette[j];
- }
- }
-
- png_ptr->index_to_palette[png_ptr->palette_to_index
- [num_new_palette]] = png_ptr->index_to_palette[j];
-
- png_ptr->palette_to_index[png_ptr->index_to_palette[j]]
- = png_ptr->palette_to_index[num_new_palette];
-
- png_ptr->index_to_palette[j] =
- (png_byte)num_new_palette;
-
- png_ptr->palette_to_index[num_new_palette] =
- (png_byte)j;
- }
- if (num_new_palette <= maximum_colors)
- break;
- }
- if (num_new_palette <= maximum_colors)
- break;
- }
- }
-
- for (i = 0; i < 769; i++)
- {
- if (hash[i] != NULL)
- {
- png_dsortp p = hash[i];
- while (p)
- {
- t = p->next;
- png_free(png_ptr, p);
- p = t;
- }
- }
- hash[i] = 0;
- }
- max_d += 96;
- }
- png_free(png_ptr, hash);
- png_free(png_ptr, png_ptr->palette_to_index);
- png_free(png_ptr, png_ptr->index_to_palette);
- png_ptr->palette_to_index = NULL;
- png_ptr->index_to_palette = NULL;
- }
- num_palette = maximum_colors;
- }
- if (png_ptr->palette == NULL)
- {
- png_ptr->palette = palette;
- }
- png_ptr->num_palette = (png_uint_16)num_palette;
-
- if (full_quantize)
- {
- int i;
- png_bytep distance;
- int total_bits = PNG_QUANTIZE_RED_BITS + PNG_QUANTIZE_GREEN_BITS +
- PNG_QUANTIZE_BLUE_BITS;
- int num_red = (1 << PNG_QUANTIZE_RED_BITS);
- int num_green = (1 << PNG_QUANTIZE_GREEN_BITS);
- int num_blue = (1 << PNG_QUANTIZE_BLUE_BITS);
- png_size_t num_entries = ((png_size_t)1 << total_bits);
-
- png_ptr->palette_lookup = (png_bytep)png_calloc(png_ptr,
- (png_uint_32)(num_entries * png_sizeof(png_byte)));
-
- distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries *
- png_sizeof(png_byte)));
-
- png_memset(distance, 0xff, num_entries * png_sizeof(png_byte));
-
- for (i = 0; i < num_palette; i++)
- {
- int ir, ig, ib;
- int r = (palette[i].red >> (8 - PNG_QUANTIZE_RED_BITS));
- int g = (palette[i].green >> (8 - PNG_QUANTIZE_GREEN_BITS));
- int b = (palette[i].blue >> (8 - PNG_QUANTIZE_BLUE_BITS));
-
- for (ir = 0; ir < num_red; ir++)
- {
- /* int dr = abs(ir - r); */
- int dr = ((ir > r) ? ir - r : r - ir);
- int index_r = (ir << (PNG_QUANTIZE_BLUE_BITS +
- PNG_QUANTIZE_GREEN_BITS));
-
- for (ig = 0; ig < num_green; ig++)
- {
- /* int dg = abs(ig - g); */
- int dg = ((ig > g) ? ig - g : g - ig);
- int dt = dr + dg;
- int dm = ((dr > dg) ? dr : dg);
- int index_g = index_r | (ig << PNG_QUANTIZE_BLUE_BITS);
-
- for (ib = 0; ib < num_blue; ib++)
- {
- int d_index = index_g | ib;
- /* int db = abs(ib - b); */
- int db = ((ib > b) ? ib - b : b - ib);
- int dmax = ((dm > db) ? dm : db);
- int d = dmax + dt + db;
-
- if (d < (int)distance[d_index])
- {
- distance[d_index] = (png_byte)d;
- png_ptr->palette_lookup[d_index] = (png_byte)i;
- }
- }
- }
- }
- }
-
- png_free(png_ptr, distance);
- }
-}
-#endif /* PNG_READ_QUANTIZE_SUPPORTED */
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
-/* Transform the image from the file_gamma to the screen_gamma. We
- * only do transformations on images where the file_gamma and screen_gamma
- * are not close reciprocals, otherwise it slows things down slightly, and
- * also needlessly introduces small errors.
- *
- * We will turn off gamma transformation later if no semitransparent entries
- * are present in the tRNS array for palette images. We can't do it here
- * because we don't necessarily have the tRNS chunk yet.
- */
-static int /* PRIVATE */
-png_gamma_threshold(png_fixed_point scrn_gamma, png_fixed_point file_gamma)
-{
- /* PNG_GAMMA_THRESHOLD is the threshold for performing gamma
- * correction as a difference of the overall transform from 1.0
- *
- * We want to compare the threshold with s*f - 1, if we get
- * overflow here it is because of wacky gamma values so we
- * turn on processing anyway.
- */
- png_fixed_point gtest;
- return !png_muldiv(>est, scrn_gamma, file_gamma, PNG_FP_1) ||
- png_gamma_significant(gtest);
-}
-
-void PNGFAPI
-png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma,
- png_fixed_point file_gamma)
-{
- png_debug(1, "in png_set_gamma_fixed");
-
- if (png_ptr == NULL)
- return;
-
- if ((png_ptr->color_type & PNG_COLOR_MASK_ALPHA) ||
- (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
- png_gamma_threshold(scrn_gamma, file_gamma))
- png_ptr->transformations |= PNG_GAMMA;
- png_ptr->gamma = file_gamma;
- png_ptr->screen_gamma = scrn_gamma;
-}
-
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-void PNGAPI
-png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
-{
- png_set_gamma_fixed(png_ptr,
- png_fixed(png_ptr, scrn_gamma, "png_set_gamma screen gamma"),
- png_fixed(png_ptr, file_gamma, "png_set_gamma file gamma"));
-}
-# endif /* FLOATING_POINT_SUPPORTED */
-#endif /* READ_GAMMA */
-
-#ifdef PNG_READ_EXPAND_SUPPORTED
-/* Expand paletted images to RGB, expand grayscale images of
- * less than 8-bit depth to 8-bit depth, and expand tRNS chunks
- * to alpha channels.
- */
-void PNGAPI
-png_set_expand(png_structp png_ptr)
-{
- png_debug(1, "in png_set_expand");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
- png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
-}
-
-/* GRR 19990627: the following three functions currently are identical
- * to png_set_expand(). However, it is entirely reasonable that someone
- * might wish to expand an indexed image to RGB but *not* expand a single,
- * fully transparent palette entry to a full alpha channel--perhaps instead
- * convert tRNS to the grayscale/RGB format (16-bit RGB value), or replace
- * the transparent color with a particular RGB value, or drop tRNS entirely.
- * IOW, a future version of the library may make the transformations flag
- * a bit more fine-grained, with separate bits for each of these three
- * functions.
- *
- * More to the point, these functions make it obvious what libpng will be
- * doing, whereas "expand" can (and does) mean any number of things.
- *
- * GRP 20060307: In libpng-1.2.9, png_set_gray_1_2_4_to_8() was modified
- * to expand only the sample depth but not to expand the tRNS to alpha
- * and its name was changed to png_set_expand_gray_1_2_4_to_8().
- */
-
-/* Expand paletted images to RGB. */
-void PNGAPI
-png_set_palette_to_rgb(png_structp png_ptr)
-{
- png_debug(1, "in png_set_palette_to_rgb");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
- png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
-}
-
-/* Expand grayscale images of less than 8-bit depth to 8 bits. */
-void PNGAPI
-png_set_expand_gray_1_2_4_to_8(png_structp png_ptr)
-{
- png_debug(1, "in png_set_expand_gray_1_2_4_to_8");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_EXPAND;
- png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
-}
-
-
-
-/* Expand tRNS chunks to alpha channels. */
-void PNGAPI
-png_set_tRNS_to_alpha(png_structp png_ptr)
-{
- png_debug(1, "in png_set_tRNS_to_alpha");
-
- png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
- png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
-}
-#endif /* defined(PNG_READ_EXPAND_SUPPORTED) */
-
-#ifdef PNG_READ_EXPAND_16_SUPPORTED
-/* Expand to 16 bit channels, expand the tRNS chunk too (because otherwise
- * it may not work correctly.)
- */
-void PNGAPI
-png_set_expand_16(png_structp png_ptr)
-{
- png_debug(1, "in png_set_expand_16");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= (PNG_EXPAND_16 | PNG_EXPAND | PNG_EXPAND_tRNS);
- png_ptr->transformations &= ~PNG_16_TO_8;
-
- png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
-}
-#endif
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
-void PNGAPI
-png_set_gray_to_rgb(png_structp png_ptr)
-{
- png_debug(1, "in png_set_gray_to_rgb");
-
- if (png_ptr != NULL)
- {
- /* Because rgb must be 8 bits or more: */
- png_set_expand_gray_1_2_4_to_8(png_ptr);
- png_ptr->transformations |= PNG_GRAY_TO_RGB;
- png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
- }
-}
-#endif
-
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-void PNGFAPI
-png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
- png_fixed_point red, png_fixed_point green)
-{
- png_debug(1, "in png_set_rgb_to_gray");
-
- if (png_ptr == NULL)
- return;
-
- switch(error_action)
- {
- case 1:
- png_ptr->transformations |= PNG_RGB_TO_GRAY;
- break;
-
- case 2:
- png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN;
- break;
-
- case 3:
- png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR;
- break;
-
- default:
- png_error(png_ptr, "invalid error action to rgb_to_gray");
- break;
- }
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
-#ifdef PNG_READ_EXPAND_SUPPORTED
- png_ptr->transformations |= PNG_EXPAND;
-#else
- {
- png_warning(png_ptr,
- "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED");
-
- png_ptr->transformations &= ~PNG_RGB_TO_GRAY;
- }
-#endif
- {
- png_uint_16 red_int, green_int;
- if (red < 0 || green < 0)
- {
- red_int = 6968; /* .212671 * 32768 + .5 */
- green_int = 23434; /* .715160 * 32768 + .5 */
- }
-
- else if (red + green < 100000L)
- {
- red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L);
- green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L);
- }
-
- else
- {
- png_warning(png_ptr, "ignoring out of range rgb_to_gray coefficients");
- red_int = 6968;
- green_int = 23434;
- }
-
- png_ptr->rgb_to_gray_red_coeff = red_int;
- png_ptr->rgb_to_gray_green_coeff = green_int;
- png_ptr->rgb_to_gray_blue_coeff =
- (png_uint_16)(32768 - red_int - green_int);
- }
-}
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-/* Convert a RGB image to a grayscale of the same width. This allows us,
- * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image.
- */
-
-void PNGAPI
-png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red,
- double green)
-{
- if (png_ptr == NULL)
- return;
-
- png_set_rgb_to_gray_fixed(png_ptr, error_action,
- png_fixed(png_ptr, red, "rgb to gray red coefficient"),
- png_fixed(png_ptr, green, "rgb to gray green coefficient"));
-}
-#endif /* FLOATING POINT */
-
-#endif
-
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-void PNGAPI
-png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
- read_user_transform_fn)
-{
- png_debug(1, "in png_set_read_user_transform_fn");
-
- if (png_ptr == NULL)
- return;
-
-#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
- png_ptr->transformations |= PNG_USER_TRANSFORM;
- png_ptr->read_user_transform_fn = read_user_transform_fn;
-#endif
-}
-#endif
-
-/* Initialize everything needed for the read. This includes modifying
- * the palette.
- */
-void /* PRIVATE */
-png_init_read_transformations(png_structp png_ptr)
-{
- png_debug(1, "in png_init_read_transformations");
-
- {
-#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
- defined(PNG_READ_SHIFT_SUPPORTED) || \
- defined(PNG_READ_GAMMA_SUPPORTED)
- int color_type = png_ptr->color_type;
-#endif
-
-#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED)
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
- /* Detect gray background and attempt to enable optimization
- * for gray --> RGB case
- *
- * Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or
- * RGB_ALPHA (in which case need_expand is superfluous anyway), the
- * background color might actually be gray yet not be flagged as such.
- * This is not a problem for the current code, which uses
- * PNG_BACKGROUND_IS_GRAY only to decide when to do the
- * png_do_gray_to_rgb() transformation.
- */
- if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
- !(color_type & PNG_COLOR_MASK_COLOR))
- {
- png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
- }
-
- else if ((png_ptr->transformations & PNG_BACKGROUND) &&
- !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
- (png_ptr->transformations & PNG_GRAY_TO_RGB) &&
- png_ptr->background.red == png_ptr->background.green &&
- png_ptr->background.red == png_ptr->background.blue)
- {
- png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
- png_ptr->background.gray = png_ptr->background.red;
- }
-#endif
-
- if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
- (png_ptr->transformations & PNG_EXPAND))
- {
- if (!(color_type & PNG_COLOR_MASK_COLOR)) /* i.e., GRAY or GRAY_ALPHA */
- {
- /* Expand background and tRNS chunks */
- switch (png_ptr->bit_depth)
- {
- case 1:
- png_ptr->background.gray *= (png_uint_16)0xff;
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
- if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
- {
- png_ptr->trans_color.gray *= (png_uint_16)0xff;
- png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
- }
- break;
-
- case 2:
- png_ptr->background.gray *= (png_uint_16)0x55;
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
- if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
- {
- png_ptr->trans_color.gray *= (png_uint_16)0x55;
- png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
- }
- break;
-
- case 4:
- png_ptr->background.gray *= (png_uint_16)0x11;
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
- if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
- {
- png_ptr->trans_color.gray *= (png_uint_16)0x11;
- png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
- }
- break;
-
- default:
-
- case 8:
-
- case 16:
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
- break;
- }
- }
- else if (color_type == PNG_COLOR_TYPE_PALETTE)
- {
- png_ptr->background.red =
- png_ptr->palette[png_ptr->background.index].red;
- png_ptr->background.green =
- png_ptr->palette[png_ptr->background.index].green;
- png_ptr->background.blue =
- png_ptr->palette[png_ptr->background.index].blue;
-
-#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
- if (png_ptr->transformations & PNG_INVERT_ALPHA)
- {
-#ifdef PNG_READ_EXPAND_SUPPORTED
- if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
-#endif
- {
- /* Invert the alpha channel (in tRNS) unless the pixels are
- * going to be expanded, in which case leave it for later
- */
- int i, istop;
- istop=(int)png_ptr->num_trans;
- for (i=0; i<istop; i++)
- png_ptr->trans_alpha[i] = (png_byte)(255 -
- png_ptr->trans_alpha[i]);
- }
- }
-#endif
-
- }
- }
-#endif
-
-#if defined(PNG_READ_BACKGROUND_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
- png_ptr->background_1 = png_ptr->background;
-#endif
-#ifdef PNG_READ_GAMMA_SUPPORTED
-
- if ((color_type == PNG_COLOR_TYPE_PALETTE && png_ptr->num_trans != 0)
- && png_gamma_threshold(png_ptr->screen_gamma, png_ptr->gamma))
- {
- int i, k;
- k=0;
- for (i=0; i<png_ptr->num_trans; i++)
- {
- if (png_ptr->trans_alpha[i] != 0 && png_ptr->trans_alpha[i] != 0xff)
- k=1; /* Partial transparency is present */
- }
- if (k == 0)
- png_ptr->transformations &= ~PNG_GAMMA;
- }
-
- if ((png_ptr->transformations & (PNG_GAMMA | PNG_RGB_TO_GRAY)) &&
- png_ptr->gamma != 0)
- {
- png_build_gamma_table(png_ptr, png_ptr->bit_depth);
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- if (png_ptr->transformations & PNG_BACKGROUND)
- {
- if (color_type == PNG_COLOR_TYPE_PALETTE)
- {
- /* Could skip if no transparency */
- png_color back, back_1;
- png_colorp palette = png_ptr->palette;
- int num_palette = png_ptr->num_palette;
- int i;
- if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE)
- {
-
- back.red = png_ptr->gamma_table[png_ptr->background.red];
- back.green = png_ptr->gamma_table[png_ptr->background.green];
- back.blue = png_ptr->gamma_table[png_ptr->background.blue];
-
- back_1.red = png_ptr->gamma_to_1[png_ptr->background.red];
- back_1.green = png_ptr->gamma_to_1[png_ptr->background.green];
- back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue];
- }
- else
- {
- png_fixed_point g, gs;
-
- switch (png_ptr->background_gamma_type)
- {
- case PNG_BACKGROUND_GAMMA_SCREEN:
- g = (png_ptr->screen_gamma);
- gs = PNG_FP_1;
- break;
-
- case PNG_BACKGROUND_GAMMA_FILE:
- g = png_reciprocal(png_ptr->gamma);
- gs = png_reciprocal2(png_ptr->gamma,
- png_ptr->screen_gamma);
- break;
-
- case PNG_BACKGROUND_GAMMA_UNIQUE:
- g = png_reciprocal(png_ptr->background_gamma);
- gs = png_reciprocal2(png_ptr->background_gamma,
- png_ptr->screen_gamma);
- break;
- default:
- g = PNG_FP_1; /* back_1 */
- gs = PNG_FP_1; /* back */
- break;
- }
-
- if (png_gamma_significant(gs))
- {
- back.red = (png_byte)png_ptr->background.red;
- back.green = (png_byte)png_ptr->background.green;
- back.blue = (png_byte)png_ptr->background.blue;
- }
-
- else
- {
- back.red = png_gamma_8bit_correct(png_ptr->background.red,
- gs);
- back.green = png_gamma_8bit_correct(png_ptr->background.green,
- gs);
- back.blue = png_gamma_8bit_correct(png_ptr->background.blue,
- gs);
- }
- back_1.red = png_gamma_8bit_correct(png_ptr->background.red, g);
- back_1.green = png_gamma_8bit_correct(png_ptr->background.green,
- g);
- back_1.blue = png_gamma_8bit_correct(png_ptr->background.blue,
- g);
- }
- for (i = 0; i < num_palette; i++)
- {
- if (i < (int)png_ptr->num_trans &&
- png_ptr->trans_alpha[i] != 0xff)
- {
- if (png_ptr->trans_alpha[i] == 0)
- {
- palette[i] = back;
- }
- else /* if (png_ptr->trans_alpha[i] != 0xff) */
- {
- png_byte v, w;
-
- v = png_ptr->gamma_to_1[palette[i].red];
- png_composite(w, v, png_ptr->trans_alpha[i], back_1.red);
- palette[i].red = png_ptr->gamma_from_1[w];
-
- v = png_ptr->gamma_to_1[palette[i].green];
- png_composite(w, v, png_ptr->trans_alpha[i], back_1.green);
- palette[i].green = png_ptr->gamma_from_1[w];
-
- v = png_ptr->gamma_to_1[palette[i].blue];
- png_composite(w, v, png_ptr->trans_alpha[i], back_1.blue);
- palette[i].blue = png_ptr->gamma_from_1[w];
- }
- }
- else
- {
- palette[i].red = png_ptr->gamma_table[palette[i].red];
- palette[i].green = png_ptr->gamma_table[palette[i].green];
- palette[i].blue = png_ptr->gamma_table[palette[i].blue];
- }
- }
- /* Prevent the transformations being done again, and make sure
- * that the now spurious alpha channel is stripped - the code
- * has just reduced background composition and gamma correction
- * to a simple alpha channel strip.
- */
- png_ptr->transformations &= ~PNG_BACKGROUND;
- png_ptr->transformations &= ~PNG_GAMMA;
- png_ptr->transformations |= PNG_STRIP_ALPHA;
- }
-
- /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */
- else
- /* color_type != PNG_COLOR_TYPE_PALETTE */
- {
- png_fixed_point g = PNG_FP_1;
- png_fixed_point gs = PNG_FP_1;
-
- switch (png_ptr->background_gamma_type)
- {
- case PNG_BACKGROUND_GAMMA_SCREEN:
- g = png_ptr->screen_gamma;
- /* gs = PNG_FP_1; */
- break;
-
- case PNG_BACKGROUND_GAMMA_FILE:
- g = png_reciprocal(png_ptr->gamma);
- gs = png_reciprocal2(png_ptr->gamma, png_ptr->screen_gamma);
- break;
-
- case PNG_BACKGROUND_GAMMA_UNIQUE:
- g = png_reciprocal(png_ptr->background_gamma);
- gs = png_reciprocal2(png_ptr->background_gamma,
- png_ptr->screen_gamma);
- break;
-
- default:
- png_error(png_ptr, "invalid background gamma type");
- }
-
- png_ptr->background_1.gray = png_gamma_correct(png_ptr,
- png_ptr->background.gray, g);
-
- png_ptr->background.gray = png_gamma_correct(png_ptr,
- png_ptr->background.gray, gs);
-
- if ((png_ptr->background.red != png_ptr->background.green) ||
- (png_ptr->background.red != png_ptr->background.blue) ||
- (png_ptr->background.red != png_ptr->background.gray))
- {
- /* RGB or RGBA with color background */
- png_ptr->background_1.red = png_gamma_correct(png_ptr,
- png_ptr->background.red, g);
-
- png_ptr->background_1.green = png_gamma_correct(png_ptr,
- png_ptr->background.green, g);
-
- png_ptr->background_1.blue = png_gamma_correct(png_ptr,
- png_ptr->background.blue, g);
-
- png_ptr->background.red = png_gamma_correct(png_ptr,
- png_ptr->background.red, gs);
-
- png_ptr->background.green = png_gamma_correct(png_ptr,
- png_ptr->background.green, gs);
-
- png_ptr->background.blue = png_gamma_correct(png_ptr,
- png_ptr->background.blue, gs);
- }
-
- else
- {
- /* GRAY, GRAY ALPHA, RGB, or RGBA with gray background */
- png_ptr->background_1.red = png_ptr->background_1.green
- = png_ptr->background_1.blue = png_ptr->background_1.gray;
-
- png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
- }
- }
- }
- else
- /* Transformation does not include PNG_BACKGROUND */
-#endif /* PNG_READ_BACKGROUND_SUPPORTED */
- if (color_type == PNG_COLOR_TYPE_PALETTE)
- {
- png_colorp palette = png_ptr->palette;
- int num_palette = png_ptr->num_palette;
- int i;
-
- for (i = 0; i < num_palette; i++)
- {
- palette[i].red = png_ptr->gamma_table[palette[i].red];
- palette[i].green = png_ptr->gamma_table[palette[i].green];
- palette[i].blue = png_ptr->gamma_table[palette[i].blue];
- }
-
- /* Done the gamma correction. */
- png_ptr->transformations &= ~PNG_GAMMA;
- }
- }
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- else
-#endif
-#endif /* PNG_READ_GAMMA_SUPPORTED */
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- /* No GAMMA transformation */
- if ((png_ptr->transformations & PNG_BACKGROUND) &&
- (color_type == PNG_COLOR_TYPE_PALETTE))
- {
- int i;
- int istop = (int)png_ptr->num_trans;
- png_color back;
- png_colorp palette = png_ptr->palette;
-
- back.red = (png_byte)png_ptr->background.red;
- back.green = (png_byte)png_ptr->background.green;
- back.blue = (png_byte)png_ptr->background.blue;
-
- for (i = 0; i < istop; i++)
- {
- if (png_ptr->trans_alpha[i] == 0)
- {
- palette[i] = back;
- }
-
- else if (png_ptr->trans_alpha[i] != 0xff)
- {
- /* The png_composite() macro is defined in png.h */
- png_composite(palette[i].red, palette[i].red,
- png_ptr->trans_alpha[i], back.red);
-
- png_composite(palette[i].green, palette[i].green,
- png_ptr->trans_alpha[i], back.green);
-
- png_composite(palette[i].blue, palette[i].blue,
- png_ptr->trans_alpha[i], back.blue);
- }
- }
-
- /* Handled alpha, still need to strip the channel. */
- png_ptr->transformations &= ~PNG_BACKGROUND;
- png_ptr->transformations |= PNG_STRIP_ALPHA;
- }
-#endif /* PNG_READ_BACKGROUND_SUPPORTED */
-
-#ifdef PNG_READ_SHIFT_SUPPORTED
- if ((png_ptr->transformations & PNG_SHIFT) &&
- (color_type == PNG_COLOR_TYPE_PALETTE))
- {
- png_uint_16 i;
- png_uint_16 istop = png_ptr->num_palette;
- int sr = 8 - png_ptr->sig_bit.red;
- int sg = 8 - png_ptr->sig_bit.green;
- int sb = 8 - png_ptr->sig_bit.blue;
-
- if (sr < 0 || sr > 8)
- sr = 0;
-
- if (sg < 0 || sg > 8)
- sg = 0;
-
- if (sb < 0 || sb > 8)
- sb = 0;
-
- for (i = 0; i < istop; i++)
- {
- png_ptr->palette[i].red >>= sr;
- png_ptr->palette[i].green >>= sg;
- png_ptr->palette[i].blue >>= sb;
- }
- }
-#endif /* PNG_READ_SHIFT_SUPPORTED */
- }
-#if !defined(PNG_READ_GAMMA_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) \
- && !defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr)
- return;
-#endif
-}
-
-/* Modify the info structure to reflect the transformations. The
- * info should be updated so a PNG file could be written with it,
- * assuming the transformations result in valid PNG data.
- */
-void /* PRIVATE */
-png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
-{
- png_debug(1, "in png_read_transform_info");
-
-#ifdef PNG_READ_EXPAND_SUPPORTED
- if (png_ptr->transformations & PNG_EXPAND)
- {
- if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (png_ptr->num_trans &&
- (png_ptr->transformations & PNG_EXPAND_tRNS))
- info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
-
- else
- info_ptr->color_type = PNG_COLOR_TYPE_RGB;
-
- info_ptr->bit_depth = 8;
- info_ptr->num_trans = 0;
- }
- else
- {
- if (png_ptr->num_trans)
- {
- if (png_ptr->transformations & PNG_EXPAND_tRNS)
- info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
- }
- if (info_ptr->bit_depth < 8)
- info_ptr->bit_depth = 8;
-
- info_ptr->num_trans = 0;
- }
- }
-#endif
-
-#ifdef PNG_READ_EXPAND_16_SUPPORTED
- if (png_ptr->transformations & PNG_EXPAND_16 && info_ptr->bit_depth == 8 &&
- info_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
- {
- info_ptr->bit_depth = 16;
- }
-#endif
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- if (png_ptr->transformations & PNG_BACKGROUND)
- {
- info_ptr->color_type = (png_byte)(info_ptr->color_type &
- ~PNG_COLOR_MASK_ALPHA);
- info_ptr->num_trans = 0;
- info_ptr->background = png_ptr->background;
- }
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (png_ptr->transformations & PNG_GAMMA)
- {
- info_ptr->gamma = png_ptr->gamma;
- }
-#endif
-
-#ifdef PNG_READ_16_TO_8_SUPPORTED
-#ifdef PNG_READ_16BIT_SUPPORTED
- if ((png_ptr->transformations & PNG_16_TO_8) && (info_ptr->bit_depth == 16))
- info_ptr->bit_depth = 8;
-#else
- /* Force chopping 16-bit input down to 8 */
- if (info_ptr->bit_depth == 16)
- {
- png_ptr->transformations |=PNG_16_TO_8;
- info_ptr->bit_depth = 8;
- }
-#endif
-#endif
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
- if (png_ptr->transformations & PNG_GRAY_TO_RGB)
- info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
-#endif
-
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
- if (png_ptr->transformations & PNG_RGB_TO_GRAY)
- info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR;
-#endif
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
- if (png_ptr->transformations & PNG_QUANTIZE)
- {
- if (((info_ptr->color_type == PNG_COLOR_TYPE_RGB) ||
- (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) &&
- png_ptr->palette_lookup && info_ptr->bit_depth == 8)
- {
- info_ptr->color_type = PNG_COLOR_TYPE_PALETTE;
- }
- }
-#endif
-
-#ifdef PNG_READ_PACK_SUPPORTED
- if ((png_ptr->transformations & PNG_PACK) && (info_ptr->bit_depth < 8))
- info_ptr->bit_depth = 8;
-#endif
-
- if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- info_ptr->channels = 1;
-
- else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
- info_ptr->channels = 3;
-
- else
- info_ptr->channels = 1;
-
-#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
- if (png_ptr->transformations & PNG_STRIP_ALPHA)
- info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
-#endif
-
- if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
- info_ptr->channels++;
-
-#ifdef PNG_READ_FILLER_SUPPORTED
- /* STRIP_ALPHA and FILLER allowed: MASK_ALPHA bit stripped above */
- if ((png_ptr->transformations & PNG_FILLER) &&
- ((info_ptr->color_type == PNG_COLOR_TYPE_RGB) ||
- (info_ptr->color_type == PNG_COLOR_TYPE_GRAY)))
- {
- info_ptr->channels++;
- /* If adding a true alpha channel not just filler */
- if (png_ptr->transformations & PNG_ADD_ALPHA)
- info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
- }
-#endif
-
-#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \
-defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
- if (png_ptr->transformations & PNG_USER_TRANSFORM)
- {
- if (info_ptr->bit_depth < png_ptr->user_transform_depth)
- info_ptr->bit_depth = png_ptr->user_transform_depth;
-
- if (info_ptr->channels < png_ptr->user_transform_channels)
- info_ptr->channels = png_ptr->user_transform_channels;
- }
-#endif
-
- info_ptr->pixel_depth = (png_byte)(info_ptr->channels *
- info_ptr->bit_depth);
-
- info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, info_ptr->width);
-
-#ifndef PNG_READ_EXPAND_SUPPORTED
- if (png_ptr)
- return;
-#endif
-}
-
-/* Transform the row. The order of transformations is significant,
- * and is very touchy. If you add a transformation, take care to
- * decide how it fits in with the other transformations here.
- */
-void /* PRIVATE */
-png_do_read_transformations(png_structp png_ptr)
-{
- png_debug(1, "in png_do_read_transformations");
-
- if (png_ptr->row_buf == NULL)
- {
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- char msg[50];
-
- png_snprintf2(msg, 50,
- "NULL row buffer for row %ld, pass %d", (long)png_ptr->row_number,
- png_ptr->pass);
- png_error(png_ptr, msg);
-#else
- png_error(png_ptr, "NULL row buffer");
-#endif
- }
-#ifdef PNG_WARN_UNINITIALIZED_ROW
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
- /* Application has failed to call either png_read_start_image()
- * or png_read_update_info() after setting transforms that expand
- * pixels. This check added to libpng-1.2.19
- */
-#if (PNG_WARN_UNINITIALIZED_ROW==1)
- png_error(png_ptr, "Uninitialized row");
-#else
- png_warning(png_ptr, "Uninitialized row");
-#endif
-#endif
-
-#ifdef PNG_READ_EXPAND_SUPPORTED
- if (png_ptr->transformations & PNG_EXPAND)
- {
- if (png_ptr->row_info.color_type == PNG_COLOR_TYPE_PALETTE)
- {
- png_do_expand_palette(&(png_ptr->row_info), png_ptr->row_buf + 1,
- png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
- }
-
- else
- {
- if (png_ptr->num_trans &&
- (png_ptr->transformations & PNG_EXPAND_tRNS))
- png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
- &(png_ptr->trans_color));
-
- else
- png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
- NULL);
- }
- }
-#endif
-
- /* Delay the 'expand 16' step until later for efficiency, so that the
- * intermediate steps work with 8 bit data.
- */
-
-#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
- if ((png_ptr->transformations & PNG_STRIP_ALPHA) &&
- (png_ptr->row_info.color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
- png_ptr->row_info.color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
- png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
- 0/*!at_start, because SWAP_ALPHA happens later*/);
-#endif
-
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
- if (png_ptr->transformations & PNG_RGB_TO_GRAY)
- {
- int rgb_error =
- png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info),
- png_ptr->row_buf + 1);
-
- if (rgb_error)
- {
- png_ptr->rgb_to_gray_status=1;
- if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
- PNG_RGB_TO_GRAY_WARN)
- png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel");
-
- if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
- PNG_RGB_TO_GRAY_ERR)
- png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel");
- }
- }
-#endif
-
-/* From Andreas Dilger e-mail to png-implement, 26 March 1998:
- *
- * In most cases, the "simple transparency" should be done prior to doing
- * gray-to-RGB, or you will have to test 3x as many bytes to check if a
- * pixel is transparent. You would also need to make sure that the
- * transparency information is upgraded to RGB.
- *
- * To summarize, the current flow is:
- * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite
- * with background "in place" if transparent,
- * convert to RGB if necessary
- * - Gray + alpha -> composite with gray background and remove alpha bytes,
- * convert to RGB if necessary
- *
- * To support RGB backgrounds for gray images we need:
- * - Gray + simple transparency -> convert to RGB + simple transparency,
- * compare 3 or 6 bytes and composite with
- * background "in place" if transparent
- * (3x compare/pixel compared to doing
- * composite with gray bkgrnd)
- * - Gray + alpha -> convert to RGB + alpha, composite with background and
- * remove alpha bytes (3x float
- * operations/pixel compared with composite
- * on gray background)
- *
- * Greg's change will do this. The reason it wasn't done before is for
- * performance, as this increases the per-pixel operations. If we would check
- * in advance if the background was gray or RGB, and position the gray-to-RGB
- * transform appropriately, then it would save a lot of work/time.
- */
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
- /* If gray -> RGB, do so now only if background is non-gray; else do later
- * for performance reasons
- */
- if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
- !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
- png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- if ((png_ptr->transformations & PNG_BACKGROUND) &&
- ((png_ptr->num_trans != 0) ||
- (png_ptr->color_type & PNG_COLOR_MASK_ALPHA)))
- png_do_background(&(png_ptr->row_info), png_ptr->row_buf + 1,
- &(png_ptr->trans_color), &(png_ptr->background)
-#ifdef PNG_READ_GAMMA_SUPPORTED
- , &(png_ptr->background_1),
- png_ptr->gamma_table, png_ptr->gamma_from_1,
- png_ptr->gamma_to_1, png_ptr->gamma_16_table,
- png_ptr->gamma_16_from_1, png_ptr->gamma_16_to_1,
- png_ptr->gamma_shift
-#endif
- );
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if ((png_ptr->transformations & PNG_GAMMA) &&
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
- !((png_ptr->transformations & PNG_BACKGROUND) &&
- ((png_ptr->num_trans != 0) ||
- (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) &&
-#endif
- (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE))
- png_do_gamma(&(png_ptr->row_info), png_ptr->row_buf + 1,
- png_ptr->gamma_table, png_ptr->gamma_16_table,
- png_ptr->gamma_shift);
-#endif
-
-#ifdef PNG_READ_16_TO_8_SUPPORTED
- if (png_ptr->transformations & PNG_16_TO_8)
- png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
- if (png_ptr->transformations & PNG_QUANTIZE)
- {
- png_do_quantize(&(png_ptr->row_info), png_ptr->row_buf + 1,
- png_ptr->palette_lookup, png_ptr->quantize_index);
-
- if (png_ptr->row_info.rowbytes == 0)
- png_error(png_ptr, "png_do_quantize returned rowbytes=0");
- }
-#endif /* PNG_READ_QUANTIZE_SUPPORTED */
-
-#ifdef PNG_READ_EXPAND_16_SUPPORTED
- /* Do the expansion now, after all the arithmetic has been done. Notice
- * that previous transformations can handle the PNG_EXPAND_16 flag if this
- * is efficient (particularly true in the case of gamma correction, where
- * better accuracy results faster!)
- */
- if (png_ptr->transformations & PNG_EXPAND_16)
- png_do_expand_16(&png_ptr->row_info, png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_INVERT_SUPPORTED
- if (png_ptr->transformations & PNG_INVERT_MONO)
- png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_SHIFT_SUPPORTED
- if (png_ptr->transformations & PNG_SHIFT)
- png_do_unshift(&(png_ptr->row_info), png_ptr->row_buf + 1,
- &(png_ptr->shift));
-#endif
-
-#ifdef PNG_READ_PACK_SUPPORTED
- if (png_ptr->transformations & PNG_PACK)
- png_do_unpack(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_BGR_SUPPORTED
- if (png_ptr->transformations & PNG_BGR)
- png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (png_ptr->transformations & PNG_PACKSWAP)
- png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
- /*NOTE: this must be in the wrong place - what happens if BGR is set too?
- * Need pngvalid to test this combo.
- */
- /* If gray -> RGB, do so now only if we did not do so above */
- if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
- (png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
- png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_FILLER_SUPPORTED
- if (png_ptr->transformations & PNG_FILLER)
- png_do_read_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
- (png_uint_32)png_ptr->filler, png_ptr->flags);
-#endif
-
-#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
- if (png_ptr->transformations & PNG_INVERT_ALPHA)
- png_do_read_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
- if (png_ptr->transformations & PNG_SWAP_ALPHA)
- png_do_read_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_READ_16BIT_SUPPORTED
-#ifdef PNG_READ_SWAP_SUPPORTED
- if (png_ptr->transformations & PNG_SWAP_BYTES)
- png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-#endif
-
-#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
- if (png_ptr->transformations & PNG_USER_TRANSFORM)
- {
- if (png_ptr->read_user_transform_fn != NULL)
- (*(png_ptr->read_user_transform_fn)) /* User read transform function */
- (png_ptr, /* png_ptr */
- &(png_ptr->row_info), /* row_info: */
- /* png_uint_32 width; width of row */
- /* png_size_t rowbytes; number of bytes in row */
- /* png_byte color_type; color type of pixels */
- /* png_byte bit_depth; bit depth of samples */
- /* png_byte channels; number of channels (1-4) */
- /* png_byte pixel_depth; bits per pixel (depth*channels) */
- png_ptr->row_buf + 1); /* start of pixel data for row */
-#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
- if (png_ptr->user_transform_depth)
- png_ptr->row_info.bit_depth = png_ptr->user_transform_depth;
-
- if (png_ptr->user_transform_channels)
- png_ptr->row_info.channels = png_ptr->user_transform_channels;
-#endif
- png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
- png_ptr->row_info.channels);
-
- png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
- }
-#endif
-
-}
-
-#ifdef PNG_READ_PACK_SUPPORTED
-/* Unpack pixels of 1, 2, or 4 bits per pixel into 1 byte per pixel,
- * without changing the actual values. Thus, if you had a row with
- * a bit depth of 1, you would end up with bytes that only contained
- * the numbers 0 or 1. If you would rather they contain 0 and 255, use
- * png_do_shift() after this.
- */
-void /* PRIVATE */
-png_do_unpack(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_unpack");
-
- if (row_info->bit_depth < 8)
- {
- png_uint_32 i;
- png_uint_32 row_width=row_info->width;
-
- switch (row_info->bit_depth)
- {
- case 1:
- {
- png_bytep sp = row + (png_size_t)((row_width - 1) >> 3);
- png_bytep dp = row + (png_size_t)row_width - 1;
- png_uint_32 shift = 7 - (int)((row_width + 7) & 0x07);
- for (i = 0; i < row_width; i++)
- {
- *dp = (png_byte)((*sp >> shift) & 0x01);
-
- if (shift == 7)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift++;
-
- dp--;
- }
- break;
- }
-
- case 2:
- {
-
- png_bytep sp = row + (png_size_t)((row_width - 1) >> 2);
- png_bytep dp = row + (png_size_t)row_width - 1;
- png_uint_32 shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
- for (i = 0; i < row_width; i++)
- {
- *dp = (png_byte)((*sp >> shift) & 0x03);
-
- if (shift == 6)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift += 2;
-
- dp--;
- }
- break;
- }
-
- case 4:
- {
- png_bytep sp = row + (png_size_t)((row_width - 1) >> 1);
- png_bytep dp = row + (png_size_t)row_width - 1;
- png_uint_32 shift = (int)((1 - ((row_width + 1) & 0x01)) << 2);
- for (i = 0; i < row_width; i++)
- {
- *dp = (png_byte)((*sp >> shift) & 0x0f);
-
- if (shift == 4)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift = 4;
-
- dp--;
- }
- break;
- }
-
- default:
- break;
- }
- row_info->bit_depth = 8;
- row_info->pixel_depth = (png_byte)(8 * row_info->channels);
- row_info->rowbytes = row_width * row_info->channels;
- }
-}
-#endif
-
-#ifdef PNG_READ_SHIFT_SUPPORTED
-/* Reverse the effects of png_do_shift. This routine merely shifts the
- * pixels back to their significant bits values. Thus, if you have
- * a row of bit depth 8, but only 5 are significant, this will shift
- * the values back to 0 through 31.
- */
-void /* PRIVATE */
-png_do_unshift(png_row_infop row_info, png_bytep row,
- png_const_color_8p sig_bits)
-{
- png_debug(1, "in png_do_unshift");
-
- if (
- row_info->color_type != PNG_COLOR_TYPE_PALETTE)
- {
- int shift[4];
- int channels = 0;
- int c;
- png_uint_16 value = 0;
- png_uint_32 row_width = row_info->width;
-
- if (row_info->color_type & PNG_COLOR_MASK_COLOR)
- {
- shift[channels++] = row_info->bit_depth - sig_bits->red;
- shift[channels++] = row_info->bit_depth - sig_bits->green;
- shift[channels++] = row_info->bit_depth - sig_bits->blue;
- }
-
- else
- {
- shift[channels++] = row_info->bit_depth - sig_bits->gray;
- }
-
- if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
- {
- shift[channels++] = row_info->bit_depth - sig_bits->alpha;
- }
-
- for (c = 0; c < channels; c++)
- {
- if (shift[c] <= 0)
- shift[c] = 0;
-
- else
- value = 1;
- }
-
- if (!value)
- return;
-
- switch (row_info->bit_depth)
- {
- default:
- break;
-
- case 2:
- {
- png_bytep bp;
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
-
- for (bp = row, i = 0; i < istop; i++)
- {
- *bp >>= 1;
- *bp++ &= 0x55;
- }
- break;
- }
-
- case 4:
- {
- png_bytep bp = row;
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
- png_byte mask = (png_byte)((((int)0xf0 >> shift[0]) & (int)0xf0) |
- (png_byte)((int)0xf >> shift[0]));
-
- for (i = 0; i < istop; i++)
- {
- *bp >>= shift[0];
- *bp++ &= mask;
- }
- break;
- }
-
- case 8:
- {
- png_bytep bp = row;
- png_uint_32 i;
- png_uint_32 istop = row_width * channels;
-
- for (i = 0; i < istop; i++)
- {
- *bp++ >>= shift[i%channels];
- }
- break;
- }
-
-#ifdef PNG_READ_16BIT_SUPPORTED
- case 16:
- {
- png_bytep bp = row;
- png_uint_32 i;
- png_uint_32 istop = channels * row_width;
-
- for (i = 0; i < istop; i++)
- {
- value = (png_uint_16)((*bp << 8) + *(bp + 1));
- value >>= shift[i%channels];
- *bp++ = (png_byte)(value >> 8);
- *bp++ = (png_byte)(value & 0xff);
- }
- break;
- }
-#endif
- }
- }
-}
-#endif
-
-#ifdef PNG_READ_16_TO_8_SUPPORTED
-/* Chop rows of bit depth 16 down to 8 */
-void /* PRIVATE */
-png_do_chop(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_chop");
-
- if (row_info->bit_depth == 16)
- {
- png_bytep sp = row;
- png_bytep dp = row;
- png_uint_32 i;
- png_uint_32 istop = row_info->width * row_info->channels;
-
- for (i = 0; i<istop; i++, sp += 2, dp++)
- {
-#ifdef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
- /* This does a more accurate scaling of the 16-bit color
- * value, rather than a simple low-byte truncation.
- *
- * What the ideal calculation should be:
- * *dp = (((((png_uint_32)(*sp) << 8) |
- * (png_uint_32)(*(sp + 1))) * 255 + 127)
- * / (png_uint_32)65535L;
- *
- * GRR: no, I think this is what it really should be:
- * *dp = (((((png_uint_32)(*sp) << 8) |
- * (png_uint_32)(*(sp + 1))) + 128L)
- * / (png_uint_32)257L;
- *
- * GRR: here's the exact calculation with shifts:
- * temp = (((png_uint_32)(*sp) << 8) |
- * (png_uint_32)(*(sp + 1))) + 128L;
- * *dp = (temp - (temp >> 8)) >> 8;
- *
- * Approximate calculation with shift/add instead of multiply/divide:
- * *dp = ((((png_uint_32)(*sp) << 8) |
- * (png_uint_32)((int)(*(sp + 1)) - *sp)) + 128) >> 8;
- *
- * What we actually do to avoid extra shifting and conversion:
- */
-
- *dp = *sp + ((((int)(*(sp + 1)) - *sp) > 128) ? 1 : 0);
-#else
- /* Simply discard the low order byte */
- *dp = *sp;
-#endif
- }
- row_info->bit_depth = 8;
- row_info->pixel_depth = (png_byte)(8 * row_info->channels);
- row_info->rowbytes = row_info->width * row_info->channels;
- }
-}
-#endif
-
-#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
-void /* PRIVATE */
-png_do_read_swap_alpha(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_read_swap_alpha");
-
- {
- png_uint_32 row_width = row_info->width;
- if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- {
- /* This converts from RGBA to ARGB */
- if (row_info->bit_depth == 8)
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_byte save;
- png_uint_32 i;
-
- for (i = 0; i < row_width; i++)
- {
- save = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = save;
- }
- }
-
-#ifdef PNG_READ_16BIT_SUPPORTED
- /* This converts from RRGGBBAA to AARRGGBB */
- else
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_byte save[2];
- png_uint_32 i;
-
- for (i = 0; i < row_width; i++)
- {
- save[0] = *(--sp);
- save[1] = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = save[0];
- *(--dp) = save[1];
- }
- }
-#endif
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- {
- /* This converts from GA to AG */
- if (row_info->bit_depth == 8)
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_byte save;
- png_uint_32 i;
-
- for (i = 0; i < row_width; i++)
- {
- save = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = save;
- }
- }
-
-#ifdef PNG_READ_16BIT_SUPPORTED
- /* This converts from GGAA to AAGG */
- else
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_byte save[2];
- png_uint_32 i;
-
- for (i = 0; i < row_width; i++)
- {
- save[0] = *(--sp);
- save[1] = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = save[0];
- *(--dp) = save[1];
- }
- }
-#endif
- }
- }
-}
-#endif
-
-#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
-void /* PRIVATE */
-png_do_read_invert_alpha(png_row_infop row_info, png_bytep row)
-{
- png_uint_32 row_width;
- png_debug(1, "in png_do_read_invert_alpha");
-
- row_width = row_info->width;
- if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- {
- if (row_info->bit_depth == 8)
- {
- /* This inverts the alpha channel in RGBA */
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_uint_32 i;
-
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = (png_byte)(255 - *(--sp));
-
-/* This does nothing:
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- We can replace it with:
-*/
- sp-=3;
- dp=sp;
- }
- }
-
-#ifdef PNG_READ_16BIT_SUPPORTED
- /* This inverts the alpha channel in RRGGBBAA */
- else
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_uint_32 i;
-
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = (png_byte)(255 - *(--sp));
- *(--dp) = (png_byte)(255 - *(--sp));
-
-/* This does nothing:
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- We can replace it with:
-*/
- sp-=6;
- dp=sp;
- }
- }
-#endif
- }
- else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- {
- if (row_info->bit_depth == 8)
- {
- /* This inverts the alpha channel in GA */
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_uint_32 i;
-
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = (png_byte)(255 - *(--sp));
- *(--dp) = *(--sp);
- }
- }
-
-#ifdef PNG_READ_16BIT_SUPPORTED
- else
- {
- /* This inverts the alpha channel in GGAA */
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_uint_32 i;
-
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = (png_byte)(255 - *(--sp));
- *(--dp) = (png_byte)(255 - *(--sp));
-/*
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
-*/
- sp-=2;
- dp=sp;
- }
- }
-#endif
- }
-}
-#endif
-
-#ifdef PNG_READ_FILLER_SUPPORTED
-/* Add filler channel if we have RGB color */
-void /* PRIVATE */
-png_do_read_filler(png_row_infop row_info, png_bytep row,
- png_uint_32 filler, png_uint_32 flags)
-{
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
-#ifdef PNG_READ_16BIT_SUPPORTED
- png_byte hi_filler = (png_byte)((filler>>8) & 0xff);
-#endif
- png_byte lo_filler = (png_byte)(filler & 0xff);
-
- png_debug(1, "in png_do_read_filler");
-
- if (
- row_info->color_type == PNG_COLOR_TYPE_GRAY)
- {
- if (row_info->bit_depth == 8)
- {
- if (flags & PNG_FLAG_FILLER_AFTER)
- {
- /* This changes the data from G to GX */
- png_bytep sp = row + (png_size_t)row_width;
- png_bytep dp = sp + (png_size_t)row_width;
- for (i = 1; i < row_width; i++)
- {
- *(--dp) = lo_filler;
- *(--dp) = *(--sp);
- }
- *(--dp) = lo_filler;
- row_info->channels = 2;
- row_info->pixel_depth = 16;
- row_info->rowbytes = row_width * 2;
- }
-
- else
- {
- /* This changes the data from G to XG */
- png_bytep sp = row + (png_size_t)row_width;
- png_bytep dp = sp + (png_size_t)row_width;
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = *(--sp);
- *(--dp) = lo_filler;
- }
- row_info->channels = 2;
- row_info->pixel_depth = 16;
- row_info->rowbytes = row_width * 2;
- }
- }
-
-#ifdef PNG_READ_16BIT_SUPPORTED
- else if (row_info->bit_depth == 16)
- {
- if (flags & PNG_FLAG_FILLER_AFTER)
- {
- /* This changes the data from GG to GGXX */
- png_bytep sp = row + (png_size_t)row_width * 2;
- png_bytep dp = sp + (png_size_t)row_width * 2;
- for (i = 1; i < row_width; i++)
- {
- *(--dp) = hi_filler;
- *(--dp) = lo_filler;
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- }
- *(--dp) = hi_filler;
- *(--dp) = lo_filler;
- row_info->channels = 2;
- row_info->pixel_depth = 32;
- row_info->rowbytes = row_width * 4;
- }
-
- else
- {
- /* This changes the data from GG to XXGG */
- png_bytep sp = row + (png_size_t)row_width * 2;
- png_bytep dp = sp + (png_size_t)row_width * 2;
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = hi_filler;
- *(--dp) = lo_filler;
- }
- row_info->channels = 2;
- row_info->pixel_depth = 32;
- row_info->rowbytes = row_width * 4;
- }
- }
-#endif
- } /* COLOR_TYPE == GRAY */
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB)
- {
- if (row_info->bit_depth == 8)
- {
- if (flags & PNG_FLAG_FILLER_AFTER)
- {
- /* This changes the data from RGB to RGBX */
- png_bytep sp = row + (png_size_t)row_width * 3;
- png_bytep dp = sp + (png_size_t)row_width;
- for (i = 1; i < row_width; i++)
- {
- *(--dp) = lo_filler;
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- }
- *(--dp) = lo_filler;
- row_info->channels = 4;
- row_info->pixel_depth = 32;
- row_info->rowbytes = row_width * 4;
- }
-
- else
- {
- /* This changes the data from RGB to XRGB */
- png_bytep sp = row + (png_size_t)row_width * 3;
- png_bytep dp = sp + (png_size_t)row_width;
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = lo_filler;
- }
- row_info->channels = 4;
- row_info->pixel_depth = 32;
- row_info->rowbytes = row_width * 4;
- }
- }
-
-#ifdef PNG_READ_16BIT_SUPPORTED
- else if (row_info->bit_depth == 16)
- {
- if (flags & PNG_FLAG_FILLER_AFTER)
- {
- /* This changes the data from RRGGBB to RRGGBBXX */
- png_bytep sp = row + (png_size_t)row_width * 6;
- png_bytep dp = sp + (png_size_t)row_width * 2;
- for (i = 1; i < row_width; i++)
- {
- *(--dp) = hi_filler;
- *(--dp) = lo_filler;
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- }
- *(--dp) = hi_filler;
- *(--dp) = lo_filler;
- row_info->channels = 4;
- row_info->pixel_depth = 64;
- row_info->rowbytes = row_width * 8;
- }
-
- else
- {
- /* This changes the data from RRGGBB to XXRRGGBB */
- png_bytep sp = row + (png_size_t)row_width * 6;
- png_bytep dp = sp + (png_size_t)row_width * 2;
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = hi_filler;
- *(--dp) = lo_filler;
- }
-
- row_info->channels = 4;
- row_info->pixel_depth = 64;
- row_info->rowbytes = row_width * 8;
- }
- }
-#endif
- } /* COLOR_TYPE == RGB */
-}
-#endif
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
-/* Expand grayscale files to RGB, with or without alpha */
-void /* PRIVATE */
-png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
-{
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- png_debug(1, "in png_do_gray_to_rgb");
-
- if (row_info->bit_depth >= 8 &&
- !(row_info->color_type & PNG_COLOR_MASK_COLOR))
- {
- if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
- {
- if (row_info->bit_depth == 8)
- {
- /* This changes G to RGB */
- png_bytep sp = row + (png_size_t)row_width - 1;
- png_bytep dp = sp + (png_size_t)row_width * 2;
- for (i = 0; i < row_width; i++)
- {
- *(dp--) = *sp;
- *(dp--) = *sp;
- *(dp--) = *(sp--);
- }
- }
-
- else
- {
- /* This changes GG to RRGGBB */
- png_bytep sp = row + (png_size_t)row_width * 2 - 1;
- png_bytep dp = sp + (png_size_t)row_width * 4;
- for (i = 0; i < row_width; i++)
- {
- *(dp--) = *sp;
- *(dp--) = *(sp - 1);
- *(dp--) = *sp;
- *(dp--) = *(sp - 1);
- *(dp--) = *(sp--);
- *(dp--) = *(sp--);
- }
- }
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- {
- if (row_info->bit_depth == 8)
- {
- /* This changes GA to RGBA */
- png_bytep sp = row + (png_size_t)row_width * 2 - 1;
- png_bytep dp = sp + (png_size_t)row_width * 2;
- for (i = 0; i < row_width; i++)
- {
- *(dp--) = *(sp--);
- *(dp--) = *sp;
- *(dp--) = *sp;
- *(dp--) = *(sp--);
- }
- }
-
- else
- {
- /* This changes GGAA to RRGGBBAA */
- png_bytep sp = row + (png_size_t)row_width * 4 - 1;
- png_bytep dp = sp + (png_size_t)row_width * 4;
- for (i = 0; i < row_width; i++)
- {
- *(dp--) = *(sp--);
- *(dp--) = *(sp--);
- *(dp--) = *sp;
- *(dp--) = *(sp - 1);
- *(dp--) = *sp;
- *(dp--) = *(sp - 1);
- *(dp--) = *(sp--);
- *(dp--) = *(sp--);
- }
- }
- }
- row_info->channels += (png_byte)2;
- row_info->color_type |= PNG_COLOR_MASK_COLOR;
- row_info->pixel_depth = (png_byte)(row_info->channels *
- row_info->bit_depth);
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
- }
-}
-#endif
-
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-/* Reduce RGB files to grayscale, with or without alpha
- * using the equation given in Poynton's ColorFAQ at
- * <http://www.inforamp.net/~poynton/> (THIS LINK IS DEAD June 2008)
- * New link:
- * <http://www.poynton.com/notes/colour_and_gamma/>
- * Charles Poynton poynton at poynton.com
- *
- * Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
- *
- * We approximate this with
- *
- * Y = 0.21268 * R + 0.7151 * G + 0.07217 * B
- *
- * which can be expressed with integers as
- *
- * Y = (6969 * R + 23434 * G + 2365 * B)/32768
- *
- * The calculation is to be done in a linear colorspace.
- *
- * Other integer coefficents can be used via png_set_rgb_to_gray().
- */
-int /* PRIVATE */
-png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
-
-{
- png_uint_32 i;
-
- png_uint_32 row_width = row_info->width;
- int rgb_error = 0;
-
- png_debug(1, "in png_do_rgb_to_gray");
-
- if (!(row_info->color_type & PNG_COLOR_MASK_PALETTE) &&
- (row_info->color_type & PNG_COLOR_MASK_COLOR))
- {
- png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
- png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
- png_uint_32 bc = png_ptr->rgb_to_gray_blue_coeff;
-
- if (row_info->color_type == PNG_COLOR_TYPE_RGB)
- {
- if (row_info->bit_depth == 8)
- {
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL)
- {
- png_bytep sp = row;
- png_bytep dp = row;
-
- for (i = 0; i < row_width; i++)
- {
- png_byte red = png_ptr->gamma_to_1[*(sp++)];
- png_byte green = png_ptr->gamma_to_1[*(sp++)];
- png_byte blue = png_ptr->gamma_to_1[*(sp++)];
-
- if (red != green || red != blue)
- {
- rgb_error |= 1;
- *(dp++) = png_ptr->gamma_from_1[
- (rc*red + gc*green + bc*blue)>>15];
- }
-
- else
- *(dp++) = *(sp - 1);
- }
- }
- else
-#endif
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_byte red = *(sp++);
- png_byte green = *(sp++);
- png_byte blue = *(sp++);
-
- if (red != green || red != blue)
- {
- rgb_error |= 1;
- *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
- }
-
- else
- *(dp++) = *(sp - 1);
- }
- }
- }
-
- else /* RGB bit_depth == 16 */
- {
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->gamma_16_to_1 != NULL &&
- png_ptr->gamma_16_from_1 != NULL)
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 red, green, blue, w;
-
- red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
-
- if (red == green && red == blue)
- w = red;
-
- else
- {
- png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff)
- >> png_ptr->gamma_shift][red>>8];
- png_uint_16 green_1 =
- png_ptr->gamma_16_to_1[(green&0xff) >>
- png_ptr->gamma_shift][green>>8];
- png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff)
- >> png_ptr->gamma_shift][blue>>8];
- png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1
- + bc*blue_1)>>15);
- w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
- png_ptr->gamma_shift][gray16 >> 8];
- rgb_error |= 1;
- }
-
- *(dp++) = (png_byte)((w>>8) & 0xff);
- *(dp++) = (png_byte)(w & 0xff);
- }
- }
- else
-#endif
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 red, green, blue, gray16;
-
- red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
-
- if (red != green || red != blue)
- rgb_error |= 1;
-
- gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
- *(dp++) = (png_byte)((gray16>>8) & 0xff);
- *(dp++) = (png_byte)(gray16 & 0xff);
- }
- }
- }
- }
- if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- {
- if (row_info->bit_depth == 8)
- {
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL)
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_byte red = png_ptr->gamma_to_1[*(sp++)];
- png_byte green = png_ptr->gamma_to_1[*(sp++)];
- png_byte blue = png_ptr->gamma_to_1[*(sp++)];
-
- if (red != green || red != blue)
- rgb_error |= 1;
-
- *(dp++) = png_ptr->gamma_from_1
- [(rc*red + gc*green + bc*blue)>>15];
-
- *(dp++) = *(sp++); /* alpha */
- }
- }
- else
-#endif
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_byte red = *(sp++);
- png_byte green = *(sp++);
- png_byte blue = *(sp++);
- if (red != green || red != blue)
- rgb_error |= 1;
-
- *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
- *(dp++) = *(sp++); /* alpha */
- }
- }
- }
- else /* RGBA bit_depth == 16 */
- {
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->gamma_16_to_1 != NULL &&
- png_ptr->gamma_16_from_1 != NULL)
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 red, green, blue, w;
-
- red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
-
- if (red == green && red == blue)
- w = red;
-
- else
- {
- png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >>
- png_ptr->gamma_shift][red>>8];
-
- png_uint_16 green_1 =
- png_ptr->gamma_16_to_1[(green&0xff) >>
- png_ptr->gamma_shift][green>>8];
-
- png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >>
- png_ptr->gamma_shift][blue>>8];
-
- png_uint_16 gray16 = (png_uint_16)((rc * red_1
- + gc * green_1 + bc * blue_1)>>15);
-
- w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
- png_ptr->gamma_shift][gray16 >> 8];
-
- rgb_error |= 1;
- }
-
- *(dp++) = (png_byte)((w>>8) & 0xff);
- *(dp++) = (png_byte)(w & 0xff);
- *(dp++) = *(sp++); /* alpha */
- *(dp++) = *(sp++);
- }
- }
- else
-#endif
- {
- png_bytep sp = row;
- png_bytep dp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 red, green, blue, gray16;
- red = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
- green = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
- blue = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
-
- if (red != green || red != blue)
- rgb_error |= 1;
-
- gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
- *(dp++) = (png_byte)((gray16>>8) & 0xff);
- *(dp++) = (png_byte)(gray16 & 0xff);
- *(dp++) = *(sp++); /* alpha */
- *(dp++) = *(sp++);
- }
- }
- }
- }
- row_info->channels -= 2;
- row_info->color_type = (png_byte)(row_info->color_type &
- ~PNG_COLOR_MASK_COLOR);
- row_info->pixel_depth = (png_byte)(row_info->channels *
- row_info->bit_depth);
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
- }
- return rgb_error;
-}
-#endif
-
-/* Build a grayscale palette. Palette is assumed to be 1 << bit_depth
- * large of png_color. This lets grayscale images be treated as
- * paletted. Most useful for gamma correction and simplification
- * of code.
- */
-void PNGAPI
-png_build_grayscale_palette(int bit_depth, png_colorp palette)
-{
- int num_palette;
- int color_inc;
- int i;
- int v;
-
- png_debug(1, "in png_do_build_grayscale_palette");
-
- if (palette == NULL)
- return;
-
- switch (bit_depth)
- {
- case 1:
- num_palette = 2;
- color_inc = 0xff;
- break;
-
- case 2:
- num_palette = 4;
- color_inc = 0x55;
- break;
-
- case 4:
- num_palette = 16;
- color_inc = 0x11;
- break;
-
- case 8:
- num_palette = 256;
- color_inc = 1;
- break;
-
- default:
- num_palette = 0;
- color_inc = 0;
- break;
- }
-
- for (i = 0, v = 0; i < num_palette; i++, v += color_inc)
- {
- palette[i].red = (png_byte)v;
- palette[i].green = (png_byte)v;
- palette[i].blue = (png_byte)v;
- }
-}
-
-
-#ifdef PNG_READ_BACKGROUND_SUPPORTED
-/* Replace any alpha or transparency with the supplied background color.
- * "background" is already in the screen gamma, while "background_1" is
- * at a gamma of 1.0. Paletted files have already been taken care of.
- */
-void /* PRIVATE */
-png_do_background(png_row_infop row_info, png_bytep row,
- png_const_color_16p trans_color, png_const_color_16p background
-#ifdef PNG_READ_GAMMA_SUPPORTED
- , png_const_color_16p background_1, png_const_bytep gamma_table,
- png_const_bytep gamma_from_1, png_const_bytep gamma_to_1,
- png_const_uint_16pp gamma_16, png_const_uint_16pp gamma_16_from_1,
- png_const_uint_16pp gamma_16_to_1, int gamma_shift
-#endif
- )
-{
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
- int shift;
-
- png_debug(1, "in png_do_background");
-
- if (background != NULL &&
- (!(row_info->color_type & PNG_COLOR_MASK_ALPHA) ||
- (row_info->color_type != PNG_COLOR_TYPE_PALETTE && trans_color)))
- {
- switch (row_info->color_type)
- {
- case PNG_COLOR_TYPE_GRAY:
- {
- switch (row_info->bit_depth)
- {
- case 1:
- {
- sp = row;
- shift = 7;
- for (i = 0; i < row_width; i++)
- {
- if ((png_uint_16)((*sp >> shift) & 0x01)
- == trans_color->gray)
- {
- *sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
- *sp |= (png_byte)(background->gray << shift);
- }
-
- if (!shift)
- {
- shift = 7;
- sp++;
- }
-
- else
- shift--;
- }
- break;
- }
-
- case 2:
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_table != NULL)
- {
- sp = row;
- shift = 6;
- for (i = 0; i < row_width; i++)
- {
- if ((png_uint_16)((*sp >> shift) & 0x03)
- == trans_color->gray)
- {
- *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
- *sp |= (png_byte)(background->gray << shift);
- }
-
- else
- {
- png_byte p = (png_byte)((*sp >> shift) & 0x03);
- png_byte g = (png_byte)((gamma_table [p | (p << 2) |
- (p << 4) | (p << 6)] >> 6) & 0x03);
- *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
- *sp |= (png_byte)(g << shift);
- }
-
- if (!shift)
- {
- shift = 6;
- sp++;
- }
-
- else
- shift -= 2;
- }
- }
-
- else
-#endif
- {
- sp = row;
- shift = 6;
- for (i = 0; i < row_width; i++)
- {
- if ((png_uint_16)((*sp >> shift) & 0x03)
- == trans_color->gray)
- {
- *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
- *sp |= (png_byte)(background->gray << shift);
- }
-
- if (!shift)
- {
- shift = 6;
- sp++;
- }
-
- else
- shift -= 2;
- }
- }
- break;
- }
-
- case 4:
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_table != NULL)
- {
- sp = row;
- shift = 4;
- for (i = 0; i < row_width; i++)
- {
- if ((png_uint_16)((*sp >> shift) & 0x0f)
- == trans_color->gray)
- {
- *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
- *sp |= (png_byte)(background->gray << shift);
- }
-
- else
- {
- png_byte p = (png_byte)((*sp >> shift) & 0x0f);
- png_byte g = (png_byte)((gamma_table[p |
- (p << 4)] >> 4) & 0x0f);
- *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
- *sp |= (png_byte)(g << shift);
- }
-
- if (!shift)
- {
- shift = 4;
- sp++;
- }
-
- else
- shift -= 4;
- }
- }
-
- else
-#endif
- {
- sp = row;
- shift = 4;
- for (i = 0; i < row_width; i++)
- {
- if ((png_uint_16)((*sp >> shift) & 0x0f)
- == trans_color->gray)
- {
- *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
- *sp |= (png_byte)(background->gray << shift);
- }
-
- if (!shift)
- {
- shift = 4;
- sp++;
- }
-
- else
- shift -= 4;
- }
- }
- break;
- }
-
- case 8:
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_table != NULL)
- {
- sp = row;
- for (i = 0; i < row_width; i++, sp++)
- {
- if (*sp == trans_color->gray)
- *sp = (png_byte)background->gray;
-
- else
- *sp = gamma_table[*sp];
- }
- }
- else
-#endif
- {
- sp = row;
- for (i = 0; i < row_width; i++, sp++)
- {
- if (*sp == trans_color->gray)
- *sp = (png_byte)background->gray;
- }
- }
- break;
- }
-
- case 16:
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_16 != NULL)
- {
- sp = row;
- for (i = 0; i < row_width; i++, sp += 2)
- {
- png_uint_16 v;
-
- v = (png_uint_16)(((*sp) << 8) + *(sp + 1));
-
- if (v == trans_color->gray)
- {
- /* Background is already in screen gamma */
- *sp = (png_byte)((background->gray >> 8) & 0xff);
- *(sp + 1) = (png_byte)(background->gray & 0xff);
- }
-
- else
- {
- v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- }
- }
- }
- else
-#endif
- {
- sp = row;
- for (i = 0; i < row_width; i++, sp += 2)
- {
- png_uint_16 v;
-
- v = (png_uint_16)(((*sp) << 8) + *(sp + 1));
-
- if (v == trans_color->gray)
- {
- *sp = (png_byte)((background->gray >> 8) & 0xff);
- *(sp + 1) = (png_byte)(background->gray & 0xff);
- }
- }
- }
- break;
- }
-
- default:
- break;
- }
- break;
- }
-
- case PNG_COLOR_TYPE_RGB:
- {
- if (row_info->bit_depth == 8)
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_table != NULL)
- {
- sp = row;
- for (i = 0; i < row_width; i++, sp += 3)
- {
- if (*sp == trans_color->red &&
- *(sp + 1) == trans_color->green &&
- *(sp + 2) == trans_color->blue)
- {
- *sp = (png_byte)background->red;
- *(sp + 1) = (png_byte)background->green;
- *(sp + 2) = (png_byte)background->blue;
- }
-
- else
- {
- *sp = gamma_table[*sp];
- *(sp + 1) = gamma_table[*(sp + 1)];
- *(sp + 2) = gamma_table[*(sp + 2)];
- }
- }
- }
- else
-#endif
- {
- sp = row;
- for (i = 0; i < row_width; i++, sp += 3)
- {
- if (*sp == trans_color->red &&
- *(sp + 1) == trans_color->green &&
- *(sp + 2) == trans_color->blue)
- {
- *sp = (png_byte)background->red;
- *(sp + 1) = (png_byte)background->green;
- *(sp + 2) = (png_byte)background->blue;
- }
- }
- }
- }
- else /* if (row_info->bit_depth == 16) */
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_16 != NULL)
- {
- sp = row;
- for (i = 0; i < row_width; i++, sp += 6)
- {
- png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1));
-
- png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8)
- + *(sp + 3));
-
- png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8)
- + *(sp + 5));
-
- if (r == trans_color->red && g == trans_color->green &&
- b == trans_color->blue)
- {
- /* Background is already in screen gamma */
- *sp = (png_byte)((background->red >> 8) & 0xff);
- *(sp + 1) = (png_byte)(background->red & 0xff);
- *(sp + 2) = (png_byte)((background->green >> 8) & 0xff);
- *(sp + 3) = (png_byte)(background->green & 0xff);
- *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff);
- *(sp + 5) = (png_byte)(background->blue & 0xff);
- }
-
- else
- {
- png_uint_16 v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
-
- v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)];
- *(sp + 2) = (png_byte)((v >> 8) & 0xff);
- *(sp + 3) = (png_byte)(v & 0xff);
-
- v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)];
- *(sp + 4) = (png_byte)((v >> 8) & 0xff);
- *(sp + 5) = (png_byte)(v & 0xff);
- }
- }
- }
-
- else
-#endif
- {
- sp = row;
- for (i = 0; i < row_width; i++, sp += 6)
- {
- png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1));
-
- png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8)
- + *(sp + 3));
-
- png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8)
- + *(sp + 5));
-
- if (r == trans_color->red && g == trans_color->green &&
- b == trans_color->blue)
- {
- *sp = (png_byte)((background->red >> 8) & 0xff);
- *(sp + 1) = (png_byte)(background->red & 0xff);
- *(sp + 2) = (png_byte)((background->green >> 8) & 0xff);
- *(sp + 3) = (png_byte)(background->green & 0xff);
- *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff);
- *(sp + 5) = (png_byte)(background->blue & 0xff);
- }
- }
- }
- }
- break;
- }
-
- case PNG_COLOR_TYPE_GRAY_ALPHA:
- {
- if (row_info->bit_depth == 8)
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_to_1 != NULL && gamma_from_1 != NULL &&
- gamma_table != NULL)
- {
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++, sp += 2, dp++)
- {
- png_uint_16 a = *(sp + 1);
-
- if (a == 0xff)
- *dp = gamma_table[*sp];
-
- else if (a == 0)
- {
- /* Background is already in screen gamma */
- *dp = (png_byte)background->gray;
- }
-
- else
- {
- png_byte v, w;
-
- v = gamma_to_1[*sp];
- png_composite(w, v, a, background_1->gray);
- *dp = gamma_from_1[w];
- }
- }
- }
- else
-#endif
- {
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++, sp += 2, dp++)
- {
- png_byte a = *(sp + 1);
-
- if (a == 0xff)
- *dp = *sp;
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- else if (a == 0)
- *dp = (png_byte)background->gray;
-
- else
- png_composite(*dp, *sp, a, background_1->gray);
-
-#else
- *dp = (png_byte)background->gray;
-#endif
- }
- }
- }
- else /* if (png_ptr->bit_depth == 16) */
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_16 != NULL && gamma_16_from_1 != NULL &&
- gamma_16_to_1 != NULL)
- {
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++, sp += 4, dp += 2)
- {
- png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8)
- + *(sp + 3));
-
- if (a == (png_uint_16)0xffff)
- {
- png_uint_16 v;
-
- v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
- *dp = (png_byte)((v >> 8) & 0xff);
- *(dp + 1) = (png_byte)(v & 0xff);
- }
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- else if (a == 0)
-#else
- else
-#endif
- {
- /* Background is already in screen gamma */
- *dp = (png_byte)((background->gray >> 8) & 0xff);
- *(dp + 1) = (png_byte)(background->gray & 0xff);
- }
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- else
- {
- png_uint_16 g, v, w;
-
- g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
- png_composite_16(v, g, a, background_1->gray);
- w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8];
- *dp = (png_byte)((w >> 8) & 0xff);
- *(dp + 1) = (png_byte)(w & 0xff);
- }
-#endif
- }
- }
- else
-#endif
- {
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++, sp += 4, dp += 2)
- {
- png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8)
- + *(sp + 3));
-
- if (a == (png_uint_16)0xffff)
- png_memcpy(dp, sp, 2);
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- else if (a == 0)
-#else
- else
-#endif
- {
- *dp = (png_byte)((background->gray >> 8) & 0xff);
- *(dp + 1) = (png_byte)(background->gray & 0xff);
- }
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
- else
- {
- png_uint_16 g, v;
-
- g = (png_uint_16)(((*sp) << 8) + *(sp + 1));
- png_composite_16(v, g, a, background_1->gray);
- *dp = (png_byte)((v >> 8) & 0xff);
- *(dp + 1) = (png_byte)(v & 0xff);
- }
-#endif
- }
- }
- }
- break;
- }
-
- case PNG_COLOR_TYPE_RGB_ALPHA:
- {
- if (row_info->bit_depth == 8)
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_to_1 != NULL && gamma_from_1 != NULL &&
- gamma_table != NULL)
- {
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++, sp += 4, dp += 3)
- {
- png_byte a = *(sp + 3);
-
- if (a == 0xff)
- {
- *dp = gamma_table[*sp];
- *(dp + 1) = gamma_table[*(sp + 1)];
- *(dp + 2) = gamma_table[*(sp + 2)];
- }
-
- else if (a == 0)
- {
- /* Background is already in screen gamma */
- *dp = (png_byte)background->red;
- *(dp + 1) = (png_byte)background->green;
- *(dp + 2) = (png_byte)background->blue;
- }
-
- else
- {
- png_byte v, w;
-
- v = gamma_to_1[*sp];
- png_composite(w, v, a, background_1->red);
- *dp = gamma_from_1[w];
-
- v = gamma_to_1[*(sp + 1)];
- png_composite(w, v, a, background_1->green);
- *(dp + 1) = gamma_from_1[w];
-
- v = gamma_to_1[*(sp + 2)];
- png_composite(w, v, a, background_1->blue);
- *(dp + 2) = gamma_from_1[w];
- }
- }
- }
- else
-#endif
- {
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++, sp += 4, dp += 3)
- {
- png_byte a = *(sp + 3);
-
- if (a == 0xff)
- {
- *dp = *sp;
- *(dp + 1) = *(sp + 1);
- *(dp + 2) = *(sp + 2);
- }
-
- else if (a == 0)
- {
- *dp = (png_byte)background->red;
- *(dp + 1) = (png_byte)background->green;
- *(dp + 2) = (png_byte)background->blue;
- }
-
- else
- {
- png_composite(*dp, *sp, a, background->red);
-
- png_composite(*(dp + 1), *(sp + 1), a,
- background->green);
-
- png_composite(*(dp + 2), *(sp + 2), a,
- background->blue);
- }
- }
- }
- }
- else /* if (row_info->bit_depth == 16) */
- {
-#ifdef PNG_READ_GAMMA_SUPPORTED
- if (gamma_16 != NULL && gamma_16_from_1 != NULL &&
- gamma_16_to_1 != NULL)
- {
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++, sp += 8, dp += 6)
- {
- png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6))
- << 8) + (png_uint_16)(*(sp + 7)));
-
- if (a == (png_uint_16)0xffff)
- {
- png_uint_16 v;
-
- v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
- *dp = (png_byte)((v >> 8) & 0xff);
- *(dp + 1) = (png_byte)(v & 0xff);
-
- v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)];
- *(dp + 2) = (png_byte)((v >> 8) & 0xff);
- *(dp + 3) = (png_byte)(v & 0xff);
-
- v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)];
- *(dp + 4) = (png_byte)((v >> 8) & 0xff);
- *(dp + 5) = (png_byte)(v & 0xff);
- }
-
- else if (a == 0)
- {
- /* Background is already in screen gamma */
- *dp = (png_byte)((background->red >> 8) & 0xff);
- *(dp + 1) = (png_byte)(background->red & 0xff);
- *(dp + 2) = (png_byte)((background->green >> 8) & 0xff);
- *(dp + 3) = (png_byte)(background->green & 0xff);
- *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff);
- *(dp + 5) = (png_byte)(background->blue & 0xff);
- }
-
- else
- {
- png_uint_16 v, w, x;
-
- v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
- png_composite_16(w, v, a, background_1->red);
-
- x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
- *dp = (png_byte)((x >> 8) & 0xff);
- *(dp + 1) = (png_byte)(x & 0xff);
-
- v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)];
- png_composite_16(w, v, a, background_1->green);
-
- x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
- *(dp + 2) = (png_byte)((x >> 8) & 0xff);
- *(dp + 3) = (png_byte)(x & 0xff);
-
- v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)];
- png_composite_16(w, v, a, background_1->blue);
-
- x = gamma_16_from_1[(w & 0xff) >> gamma_shift][w >> 8];
- *(dp + 4) = (png_byte)((x >> 8) & 0xff);
- *(dp + 5) = (png_byte)(x & 0xff);
- }
- }
- }
-
- else
-#endif
- {
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++, sp += 8, dp += 6)
- {
- png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6))
- << 8) + (png_uint_16)(*(sp + 7)));
-
- if (a == (png_uint_16)0xffff)
- {
- png_memcpy(dp, sp, 6);
- }
-
- else if (a == 0)
- {
- *dp = (png_byte)((background->red >> 8) & 0xff);
- *(dp + 1) = (png_byte)(background->red & 0xff);
- *(dp + 2) = (png_byte)((background->green >> 8) & 0xff);
- *(dp + 3) = (png_byte)(background->green & 0xff);
- *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff);
- *(dp + 5) = (png_byte)(background->blue & 0xff);
- }
-
- else
- {
- png_uint_16 v;
-
- png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1));
- png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8)
- + *(sp + 3));
- png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8)
- + *(sp + 5));
-
- png_composite_16(v, r, a, background->red);
- *dp = (png_byte)((v >> 8) & 0xff);
- *(dp + 1) = (png_byte)(v & 0xff);
-
- png_composite_16(v, g, a, background->green);
- *(dp + 2) = (png_byte)((v >> 8) & 0xff);
- *(dp + 3) = (png_byte)(v & 0xff);
-
- png_composite_16(v, b, a, background->blue);
- *(dp + 4) = (png_byte)((v >> 8) & 0xff);
- *(dp + 5) = (png_byte)(v & 0xff);
- }
- }
- }
- }
- break;
- }
-
- default:
- break;
- }
-
- if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
- {
- row_info->color_type = (png_byte)(row_info->color_type &
- ~PNG_COLOR_MASK_ALPHA);
- row_info->channels--;
- row_info->pixel_depth = (png_byte)(row_info->channels *
- row_info->bit_depth);
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
- }
- }
-}
-#endif
-
-#ifdef PNG_READ_GAMMA_SUPPORTED
-/* Gamma correct the image, avoiding the alpha channel. Make sure
- * you do this after you deal with the transparency issue on grayscale
- * or RGB images. If your bit depth is 8, use gamma_table, if it
- * is 16, use gamma_16_table and gamma_shift. Build these with
- * build_gamma_table().
- */
-void /* PRIVATE */
-png_do_gamma(png_row_infop row_info, png_bytep row,
- png_const_bytep gamma_table, png_const_uint_16pp gamma_16_table,
- int gamma_shift)
-{
- png_bytep sp;
- png_uint_32 i;
- png_uint_32 row_width=row_info->width;
-
- png_debug(1, "in png_do_gamma");
-
- if (((row_info->bit_depth <= 8 && gamma_table != NULL) ||
- (row_info->bit_depth == 16 && gamma_16_table != NULL)))
- {
- switch (row_info->color_type)
- {
- case PNG_COLOR_TYPE_RGB:
- {
- if (row_info->bit_depth == 8)
- {
- sp = row;
- for (i = 0; i < row_width; i++)
- {
- *sp = gamma_table[*sp];
- sp++;
- *sp = gamma_table[*sp];
- sp++;
- *sp = gamma_table[*sp];
- sp++;
- }
- }
-
- else /* if (row_info->bit_depth == 16) */
- {
- sp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 v;
-
- v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- sp += 2;
-
- v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- sp += 2;
-
- v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- sp += 2;
- }
- }
- break;
- }
-
- case PNG_COLOR_TYPE_RGB_ALPHA:
- {
- if (row_info->bit_depth == 8)
- {
- sp = row;
- for (i = 0; i < row_width; i++)
- {
- *sp = gamma_table[*sp];
- sp++;
-
- *sp = gamma_table[*sp];
- sp++;
-
- *sp = gamma_table[*sp];
- sp++;
-
- sp++;
- }
- }
-
- else /* if (row_info->bit_depth == 16) */
- {
- sp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- sp += 2;
-
- v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- sp += 2;
-
- v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- sp += 4;
- }
- }
- break;
- }
-
- case PNG_COLOR_TYPE_GRAY_ALPHA:
- {
- if (row_info->bit_depth == 8)
- {
- sp = row;
- for (i = 0; i < row_width; i++)
- {
- *sp = gamma_table[*sp];
- sp += 2;
- }
- }
-
- else /* if (row_info->bit_depth == 16) */
- {
- sp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- sp += 4;
- }
- }
- break;
- }
-
- case PNG_COLOR_TYPE_GRAY:
- {
- if (row_info->bit_depth == 2)
- {
- sp = row;
- for (i = 0; i < row_width; i += 4)
- {
- int a = *sp & 0xc0;
- int b = *sp & 0x30;
- int c = *sp & 0x0c;
- int d = *sp & 0x03;
-
- *sp = (png_byte)(
- ((((int)gamma_table[a|(a>>2)|(a>>4)|(a>>6)]) ) & 0xc0)|
- ((((int)gamma_table[(b<<2)|b|(b>>2)|(b>>4)])>>2) & 0x30)|
- ((((int)gamma_table[(c<<4)|(c<<2)|c|(c>>2)])>>4) & 0x0c)|
- ((((int)gamma_table[(d<<6)|(d<<4)|(d<<2)|d])>>6) ));
- sp++;
- }
- }
-
- if (row_info->bit_depth == 4)
- {
- sp = row;
- for (i = 0; i < row_width; i += 2)
- {
- int msb = *sp & 0xf0;
- int lsb = *sp & 0x0f;
-
- *sp = (png_byte)((((int)gamma_table[msb | (msb >> 4)]) & 0xf0)
- | (((int)gamma_table[(lsb << 4) | lsb]) >> 4));
- sp++;
- }
- }
-
- else if (row_info->bit_depth == 8)
- {
- sp = row;
- for (i = 0; i < row_width; i++)
- {
- *sp = gamma_table[*sp];
- sp++;
- }
- }
-
- else if (row_info->bit_depth == 16)
- {
- sp = row;
- for (i = 0; i < row_width; i++)
- {
- png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
- *sp = (png_byte)((v >> 8) & 0xff);
- *(sp + 1) = (png_byte)(v & 0xff);
- sp += 2;
- }
- }
- break;
- }
-
- default:
- break;
- }
- }
-}
-#endif
-
-#ifdef PNG_READ_EXPAND_SUPPORTED
-/* Expands a palette row to an RGB or RGBA row depending
- * upon whether you supply trans and num_trans.
- */
-void /* PRIVATE */
-png_do_expand_palette(png_row_infop row_info, png_bytep row,
- png_const_colorp palette, png_const_bytep trans_alpha, int num_trans)
-{
- int shift, value;
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width=row_info->width;
-
- png_debug(1, "in png_do_expand_palette");
-
- if (row_info->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (row_info->bit_depth < 8)
- {
- switch (row_info->bit_depth)
- {
- case 1:
- {
- sp = row + (png_size_t)((row_width - 1) >> 3);
- dp = row + (png_size_t)row_width - 1;
- shift = 7 - (int)((row_width + 7) & 0x07);
- for (i = 0; i < row_width; i++)
- {
- if ((*sp >> shift) & 0x01)
- *dp = 1;
-
- else
- *dp = 0;
-
- if (shift == 7)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift++;
-
- dp--;
- }
- break;
- }
-
- case 2:
- {
- sp = row + (png_size_t)((row_width - 1) >> 2);
- dp = row + (png_size_t)row_width - 1;
- shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
- for (i = 0; i < row_width; i++)
- {
- value = (*sp >> shift) & 0x03;
- *dp = (png_byte)value;
- if (shift == 6)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift += 2;
-
- dp--;
- }
- break;
- }
-
- case 4:
- {
- sp = row + (png_size_t)((row_width - 1) >> 1);
- dp = row + (png_size_t)row_width - 1;
- shift = (int)((row_width & 0x01) << 2);
- for (i = 0; i < row_width; i++)
- {
- value = (*sp >> shift) & 0x0f;
- *dp = (png_byte)value;
- if (shift == 4)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift += 4;
-
- dp--;
- }
- break;
- }
-
- default:
- break;
- }
- row_info->bit_depth = 8;
- row_info->pixel_depth = 8;
- row_info->rowbytes = row_width;
- }
-
- if (row_info->bit_depth == 8)
- {
- {
- if (trans_alpha != NULL)
- {
- sp = row + (png_size_t)row_width - 1;
- dp = row + (png_size_t)(row_width << 2) - 1;
-
- for (i = 0; i < row_width; i++)
- {
- if ((int)(*sp) >= num_trans)
- *dp-- = 0xff;
-
- else
- *dp-- = trans_alpha[*sp];
-
- *dp-- = palette[*sp].blue;
- *dp-- = palette[*sp].green;
- *dp-- = palette[*sp].red;
- sp--;
- }
- row_info->bit_depth = 8;
- row_info->pixel_depth = 32;
- row_info->rowbytes = row_width * 4;
- row_info->color_type = 6;
- row_info->channels = 4;
- }
-
- else
- {
- sp = row + (png_size_t)row_width - 1;
- dp = row + (png_size_t)(row_width * 3) - 1;
-
- for (i = 0; i < row_width; i++)
- {
- *dp-- = palette[*sp].blue;
- *dp-- = palette[*sp].green;
- *dp-- = palette[*sp].red;
- sp--;
- }
-
- row_info->bit_depth = 8;
- row_info->pixel_depth = 24;
- row_info->rowbytes = row_width * 3;
- row_info->color_type = 2;
- row_info->channels = 3;
- }
- }
- }
- }
-}
-
-/* If the bit depth < 8, it is expanded to 8. Also, if the already
- * expanded transparency value is supplied, an alpha channel is built.
- */
-void /* PRIVATE */
-png_do_expand(png_row_infop row_info, png_bytep row,
- png_const_color_16p trans_value)
-{
- int shift, value;
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width=row_info->width;
-
- png_debug(1, "in png_do_expand");
-
- {
- if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
- {
- png_uint_16 gray = (png_uint_16)(trans_value ? trans_value->gray : 0);
-
- if (row_info->bit_depth < 8)
- {
- switch (row_info->bit_depth)
- {
- case 1:
- {
- gray = (png_uint_16)((gray & 0x01) * 0xff);
- sp = row + (png_size_t)((row_width - 1) >> 3);
- dp = row + (png_size_t)row_width - 1;
- shift = 7 - (int)((row_width + 7) & 0x07);
- for (i = 0; i < row_width; i++)
- {
- if ((*sp >> shift) & 0x01)
- *dp = 0xff;
-
- else
- *dp = 0;
-
- if (shift == 7)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift++;
-
- dp--;
- }
- break;
- }
-
- case 2:
- {
- gray = (png_uint_16)((gray & 0x03) * 0x55);
- sp = row + (png_size_t)((row_width - 1) >> 2);
- dp = row + (png_size_t)row_width - 1;
- shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
- for (i = 0; i < row_width; i++)
- {
- value = (*sp >> shift) & 0x03;
- *dp = (png_byte)(value | (value << 2) | (value << 4) |
- (value << 6));
- if (shift == 6)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift += 2;
-
- dp--;
- }
- break;
- }
-
- case 4:
- {
- gray = (png_uint_16)((gray & 0x0f) * 0x11);
- sp = row + (png_size_t)((row_width - 1) >> 1);
- dp = row + (png_size_t)row_width - 1;
- shift = (int)((1 - ((row_width + 1) & 0x01)) << 2);
- for (i = 0; i < row_width; i++)
- {
- value = (*sp >> shift) & 0x0f;
- *dp = (png_byte)(value | (value << 4));
- if (shift == 4)
- {
- shift = 0;
- sp--;
- }
-
- else
- shift = 4;
-
- dp--;
- }
- break;
- }
-
- default:
- break;
- }
-
- row_info->bit_depth = 8;
- row_info->pixel_depth = 8;
- row_info->rowbytes = row_width;
- }
-
- if (trans_value != NULL)
- {
- if (row_info->bit_depth == 8)
- {
- gray = gray & 0xff;
- sp = row + (png_size_t)row_width - 1;
- dp = row + (png_size_t)(row_width << 1) - 1;
-
- for (i = 0; i < row_width; i++)
- {
- if (*sp == gray)
- *dp-- = 0;
-
- else
- *dp-- = 0xff;
-
- *dp-- = *sp--;
- }
- }
-
- else if (row_info->bit_depth == 16)
- {
- png_byte gray_high = (png_byte)((gray >> 8) & 0xff);
- png_byte gray_low = (png_byte)(gray & 0xff);
- sp = row + row_info->rowbytes - 1;
- dp = row + (row_info->rowbytes << 1) - 1;
- for (i = 0; i < row_width; i++)
- {
- if (*(sp - 1) == gray_high && *(sp) == gray_low)
- {
- *dp-- = 0;
- *dp-- = 0;
- }
-
- else
- {
- *dp-- = 0xff;
- *dp-- = 0xff;
- }
-
- *dp-- = *sp--;
- *dp-- = *sp--;
- }
- }
-
- row_info->color_type = PNG_COLOR_TYPE_GRAY_ALPHA;
- row_info->channels = 2;
- row_info->pixel_depth = (png_byte)(row_info->bit_depth << 1);
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
- row_width);
- }
- }
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB && trans_value)
- {
- if (row_info->bit_depth == 8)
- {
- png_byte red = (png_byte)(trans_value->red & 0xff);
- png_byte green = (png_byte)(trans_value->green & 0xff);
- png_byte blue = (png_byte)(trans_value->blue & 0xff);
- sp = row + (png_size_t)row_info->rowbytes - 1;
- dp = row + (png_size_t)(row_width << 2) - 1;
- for (i = 0; i < row_width; i++)
- {
- if (*(sp - 2) == red && *(sp - 1) == green && *(sp) == blue)
- *dp-- = 0;
-
- else
- *dp-- = 0xff;
-
- *dp-- = *sp--;
- *dp-- = *sp--;
- *dp-- = *sp--;
- }
- }
- else if (row_info->bit_depth == 16)
- {
- png_byte red_high = (png_byte)((trans_value->red >> 8) & 0xff);
- png_byte green_high = (png_byte)((trans_value->green >> 8) & 0xff);
- png_byte blue_high = (png_byte)((trans_value->blue >> 8) & 0xff);
- png_byte red_low = (png_byte)(trans_value->red & 0xff);
- png_byte green_low = (png_byte)(trans_value->green & 0xff);
- png_byte blue_low = (png_byte)(trans_value->blue & 0xff);
- sp = row + row_info->rowbytes - 1;
- dp = row + (png_size_t)(row_width << 3) - 1;
- for (i = 0; i < row_width; i++)
- {
- if (*(sp - 5) == red_high &&
- *(sp - 4) == red_low &&
- *(sp - 3) == green_high &&
- *(sp - 2) == green_low &&
- *(sp - 1) == blue_high &&
- *(sp ) == blue_low)
- {
- *dp-- = 0;
- *dp-- = 0;
- }
-
- else
- {
- *dp-- = 0xff;
- *dp-- = 0xff;
- }
-
- *dp-- = *sp--;
- *dp-- = *sp--;
- *dp-- = *sp--;
- *dp-- = *sp--;
- *dp-- = *sp--;
- *dp-- = *sp--;
- }
- }
- row_info->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
- row_info->channels = 4;
- row_info->pixel_depth = (png_byte)(row_info->bit_depth << 2);
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
- }
- }
-}
-#endif
-
-#ifdef PNG_READ_EXPAND_16_SUPPORTED
-/* If the bit depth is 8 and the colour type is not a palette type expand the
- * whole row to 16 bits. Has no effect otherwise.
- */
-void /* PRIVATE */
-png_do_expand_16(png_row_infop row_info, png_bytep row)
-{
- if (row_info->bit_depth == 8 &&
- row_info->color_type != PNG_COLOR_TYPE_PALETTE)
- {
- /* The row have a sequence of bytes containing [0..255] and we need
- * to turn it into another row containing [0..65535], to do this we
- * calculate:
- *
- * (input / 255) * 65535
- *
- * Which happens to be exactly input * 257 and this can be achieved
- * simply by byte replication in place (copying backwards).
- */
- png_byte *sp = row + row_info->rowbytes; /* source, last byte + 1 */
- png_byte *dp = sp + row_info->rowbytes; /* destination, end + 1 */
- while (dp > sp)
- dp[-2] = dp[-1] = *--sp, dp -= 2;
-
- row_info->rowbytes *= 2;
- row_info->bit_depth = 16;
- row_info->pixel_depth = (png_byte)(row_info->channels * 16);
- }
-}
-#endif
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
-void /* PRIVATE */
-png_do_quantize(png_row_infop row_info, png_bytep row,
- png_const_bytep palette_lookup, png_const_bytep quantize_lookup)
-{
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width=row_info->width;
-
- png_debug(1, "in png_do_quantize");
-
- if (row_info->bit_depth == 8)
- {
- if (row_info->color_type == PNG_COLOR_TYPE_RGB && palette_lookup)
- {
- int r, g, b, p;
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++)
- {
- r = *sp++;
- g = *sp++;
- b = *sp++;
-
- /* This looks real messy, but the compiler will reduce
- * it down to a reasonable formula. For example, with
- * 5 bits per color, we get:
- * p = (((r >> 3) & 0x1f) << 10) |
- * (((g >> 3) & 0x1f) << 5) |
- * ((b >> 3) & 0x1f);
- */
- p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) &
- ((1 << PNG_QUANTIZE_RED_BITS) - 1)) <<
- (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) |
- (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) &
- ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) <<
- (PNG_QUANTIZE_BLUE_BITS)) |
- ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) &
- ((1 << PNG_QUANTIZE_BLUE_BITS) - 1));
-
- *dp++ = palette_lookup[p];
- }
-
- row_info->color_type = PNG_COLOR_TYPE_PALETTE;
- row_info->channels = 1;
- row_info->pixel_depth = row_info->bit_depth;
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
- palette_lookup != NULL)
- {
- int r, g, b, p;
- sp = row;
- dp = row;
- for (i = 0; i < row_width; i++)
- {
- r = *sp++;
- g = *sp++;
- b = *sp++;
- sp++;
-
- p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) &
- ((1 << PNG_QUANTIZE_RED_BITS) - 1)) <<
- (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) |
- (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) &
- ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) <<
- (PNG_QUANTIZE_BLUE_BITS)) |
- ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) &
- ((1 << PNG_QUANTIZE_BLUE_BITS) - 1));
-
- *dp++ = palette_lookup[p];
- }
-
- row_info->color_type = PNG_COLOR_TYPE_PALETTE;
- row_info->channels = 1;
- row_info->pixel_depth = row_info->bit_depth;
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_PALETTE &&
- quantize_lookup)
- {
- sp = row;
-
- for (i = 0; i < row_width; i++, sp++)
- {
- *sp = quantize_lookup[*sp];
- }
- }
- }
-}
-#endif /* PNG_READ_QUANTIZE_SUPPORTED */
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
-/* Undoes intrapixel differencing */
-void /* PRIVATE */
-png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_read_intrapixel");
-
- if (
- (row_info->color_type & PNG_COLOR_MASK_COLOR))
- {
- int bytes_per_pixel;
- png_uint_32 row_width = row_info->width;
-
- if (row_info->bit_depth == 8)
- {
- png_bytep rp;
- png_uint_32 i;
-
- if (row_info->color_type == PNG_COLOR_TYPE_RGB)
- bytes_per_pixel = 3;
-
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- bytes_per_pixel = 4;
-
- else
- return;
-
- for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
- {
- *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff);
- *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff);
- }
- }
- else if (row_info->bit_depth == 16)
- {
- png_bytep rp;
- png_uint_32 i;
-
- if (row_info->color_type == PNG_COLOR_TYPE_RGB)
- bytes_per_pixel = 6;
-
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- bytes_per_pixel = 8;
-
- else
- return;
-
- for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
- {
- png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1);
- png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3);
- png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
- png_uint_32 red = (png_uint_32)((s0 + s1 + 65536L) & 0xffffL);
- png_uint_32 blue = (png_uint_32)((s2 + s1 + 65536L) & 0xffffL);
- *(rp ) = (png_byte)((red >> 8) & 0xff);
- *(rp + 1) = (png_byte)(red & 0xff);
- *(rp + 4) = (png_byte)((blue >> 8) & 0xff);
- *(rp + 5) = (png_byte)(blue & 0xff);
- }
- }
- }
-}
-#endif /* PNG_MNG_FEATURES_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED */
+++ /dev/null
-
-/* pngrutil.c - utilities to read a PNG file
- *
- * Last changed in libpng 1.5.2 [March 31, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * This file contains routines that are only called from within
- * libpng itself during the course of reading an image.
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_READ_SUPPORTED
-
-#define png_strtod(p,a,b) strtod(a,b)
-
-png_uint_32 PNGAPI
-png_get_uint_31(png_structp png_ptr, png_const_bytep buf)
-{
- png_uint_32 uval = png_get_uint_32(buf);
-
- if (uval > PNG_UINT_31_MAX)
- png_error(png_ptr, "PNG unsigned integer out of range");
-
- return (uval);
-}
-
-#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_READ_cHRM_SUPPORTED)
-/* The following is a variation on the above for use with the fixed
- * point values used for gAMA and cHRM. Instead of png_error it
- * issues a warning and returns (-1) - an invalid value because both
- * gAMA and cHRM use *unsigned* integers for fixed point values.
- */
-#define PNG_FIXED_ERROR (-1)
-
-static png_fixed_point /* PRIVATE */
-png_get_fixed_point(png_structp png_ptr, png_const_bytep buf)
-{
- png_uint_32 uval = png_get_uint_32(buf);
-
- if (uval <= PNG_UINT_31_MAX)
- return (png_fixed_point)uval; /* known to be in range */
-
- /* The caller can turn off the warning by passing NULL. */
- if (png_ptr != NULL)
- png_warning(png_ptr, "PNG fixed point integer out of range");
-
- return PNG_FIXED_ERROR;
-}
-#endif
-
-#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
-/* NOTE: the read macros will obscure these definitions, so that if
- * PNG_USE_READ_MACROS is set the library will not use them internally,
- * but the APIs will still be available externally.
- *
- * The parentheses around "PNGAPI function_name" in the following three
- * functions are necessary because they allow the macros to co-exist with
- * these (unused but exported) functions.
- */
-
-/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
-png_uint_32 (PNGAPI
-png_get_uint_32)(png_const_bytep buf)
-{
- png_uint_32 uval =
- ((png_uint_32)(*(buf )) << 24) +
- ((png_uint_32)(*(buf + 1)) << 16) +
- ((png_uint_32)(*(buf + 2)) << 8) +
- ((png_uint_32)(*(buf + 3)) ) ;
-
- return uval;
-}
-
-/* Grab a signed 32-bit integer from a buffer in big-endian format. The
- * data is stored in the PNG file in two's complement format and there
- * is no guarantee that a 'png_int_32' is exactly 32 bits, therefore
- * the following code does a two's complement to native conversion.
- */
-png_int_32 (PNGAPI
-png_get_int_32)(png_const_bytep buf)
-{
- png_uint_32 uval = png_get_uint_32(buf);
- if ((uval & 0x80000000L) == 0) /* non-negative */
- return uval;
-
- uval = (uval ^ 0xffffffffL) + 1; /* 2's complement: -x = ~x+1 */
- return -(png_int_32)uval;
-}
-
-/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */
-png_uint_16 (PNGAPI
-png_get_uint_16)(png_const_bytep buf)
-{
- /* ANSI-C requires an int value to accomodate at least 16 bits so this
- * works and allows the compiler not to worry about possible narrowing
- * on 32 bit systems. (Pre-ANSI systems did not make integers smaller
- * than 16 bits either.)
- */
- unsigned int val =
- ((unsigned int)(*buf) << 8) +
- ((unsigned int)(*(buf + 1)));
-
- return (png_uint_16)val;
-}
-
-#endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */
-
-/* Read and check the PNG file signature */
-void /* PRIVATE */
-png_read_sig(png_structp png_ptr, png_infop info_ptr)
-{
- png_size_t num_checked, num_to_check;
-
- /* Exit if the user application does not expect a signature. */
- if (png_ptr->sig_bytes >= 8)
- return;
-
- num_checked = png_ptr->sig_bytes;
- num_to_check = 8 - num_checked;
-
-#ifdef PNG_IO_STATE_SUPPORTED
- png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE;
-#endif
-
- /* The signature must be serialized in a single I/O call. */
- png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check);
- png_ptr->sig_bytes = 8;
-
- if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
- {
- if (num_checked < 4 &&
- png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
- png_error(png_ptr, "Not a PNG file");
- else
- png_error(png_ptr, "PNG file corrupted by ASCII conversion");
- }
- if (num_checked < 3)
- png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
-}
-
-/* Read the chunk header (length + type name).
- * Put the type name into png_ptr->chunk_name, and return the length.
- */
-png_uint_32 /* PRIVATE */
-png_read_chunk_header(png_structp png_ptr)
-{
- png_byte buf[8];
- png_uint_32 length;
-
-#ifdef PNG_IO_STATE_SUPPORTED
- png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_HDR;
-#endif
-
- /* Read the length and the chunk name.
- * This must be performed in a single I/O call.
- */
- png_read_data(png_ptr, buf, 8);
- length = png_get_uint_31(png_ptr, buf);
-
- /* Put the chunk name into png_ptr->chunk_name. */
- png_memcpy(png_ptr->chunk_name, buf + 4, 4);
-
- png_debug2(0, "Reading %s chunk, length = %u",
- png_ptr->chunk_name, length);
-
- /* Reset the crc and run it over the chunk name. */
- png_reset_crc(png_ptr);
- png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
-
- /* Check to see if chunk name is valid. */
- png_check_chunk_name(png_ptr, png_ptr->chunk_name);
-
-#ifdef PNG_IO_STATE_SUPPORTED
- png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_DATA;
-#endif
-
- return length;
-}
-
-/* Read data, and (optionally) run it through the CRC. */
-void /* PRIVATE */
-png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length)
-{
- if (png_ptr == NULL)
- return;
-
- png_read_data(png_ptr, buf, length);
- png_calculate_crc(png_ptr, buf, length);
-}
-
-/* Optionally skip data and then check the CRC. Depending on whether we
- * are reading a ancillary or critical chunk, and how the program has set
- * things up, we may calculate the CRC on the data and print a message.
- * Returns '1' if there was a CRC error, '0' otherwise.
- */
-int /* PRIVATE */
-png_crc_finish(png_structp png_ptr, png_uint_32 skip)
-{
- png_size_t i;
- png_size_t istop = png_ptr->zbuf_size;
-
- for (i = (png_size_t)skip; i > istop; i -= istop)
- {
- png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
- }
-
- if (i)
- {
- png_crc_read(png_ptr, png_ptr->zbuf, i);
- }
-
- if (png_crc_error(png_ptr))
- {
- if (((png_ptr->chunk_name[0] & 0x20) && /* Ancillary */
- !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) ||
- (!(png_ptr->chunk_name[0] & 0x20) && /* Critical */
- (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)))
- {
- png_chunk_warning(png_ptr, "CRC error");
- }
-
- else
- {
- png_chunk_benign_error(png_ptr, "CRC error");
- return (0);
- }
-
- return (1);
- }
-
- return (0);
-}
-
-/* Compare the CRC stored in the PNG file with that calculated by libpng from
- * the data it has read thus far.
- */
-int /* PRIVATE */
-png_crc_error(png_structp png_ptr)
-{
- png_byte crc_bytes[4];
- png_uint_32 crc;
- int need_crc = 1;
-
- if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
- {
- if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
- (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
- need_crc = 0;
- }
-
- else /* critical */
- {
- if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
- need_crc = 0;
- }
-
-#ifdef PNG_IO_STATE_SUPPORTED
- png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_CRC;
-#endif
-
- /* The chunk CRC must be serialized in a single I/O call. */
- png_read_data(png_ptr, crc_bytes, 4);
-
- if (need_crc)
- {
- crc = png_get_uint_32(crc_bytes);
- return ((int)(crc != png_ptr->crc));
- }
-
- else
- return (0);
-}
-
-#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \
- defined(PNG_READ_iCCP_SUPPORTED)
-static png_size_t
-png_inflate(png_structp png_ptr, png_bytep data, png_size_t size,
- png_bytep output, png_size_t output_size)
-{
- png_size_t count = 0;
-
- /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't
- * even necessarily handle 65536 bytes) because the type uInt is "16 bits or
- * more". Consequently it is necessary to chunk the input to zlib. This
- * code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the maximum value
- * that can be stored in a uInt.) It is possible to set ZLIB_IO_MAX to a
- * lower value in pngpriv.h and this may sometimes have a performance
- * advantage, because it forces access of the input data to be separated from
- * at least some of the use by some period of time.
- */
- png_ptr->zstream.next_in = data;
- /* avail_in is set below from 'size' */
- png_ptr->zstream.avail_in = 0;
-
- while (1)
- {
- int ret, avail;
-
- /* The setting of 'avail_in' used to be outside the loop, by setting it
- * inside it is possible to chunk the input to zlib and simply rely on
- * zlib to advance the 'next_in' pointer. This allows arbitrary amounts o
- * data to be passed through zlib at the unavoidable cost of requiring a
- * window save (memcpy of up to 32768 output bytes) every ZLIB_IO_MAX
- * input bytes.
- */
- if (png_ptr->zstream.avail_in == 0 && size > 0)
- {
- if (size <= ZLIB_IO_MAX)
- {
- /* The value is less than ZLIB_IO_MAX so the cast is safe: */
- png_ptr->zstream.avail_in = (uInt)size;
- size = 0;
- }
-
- else
- {
- png_ptr->zstream.avail_in = ZLIB_IO_MAX;
- size -= ZLIB_IO_MAX;
- }
- }
-
- /* Reset the output buffer each time round - we empty it
- * after every inflate call.
- */
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = png_ptr->zbuf_size;
-
- ret = inflate(&png_ptr->zstream, Z_NO_FLUSH);
- avail = png_ptr->zbuf_size - png_ptr->zstream.avail_out;
-
- /* First copy/count any new output - but only if we didn't
- * get an error code.
- */
- if ((ret == Z_OK || ret == Z_STREAM_END) && avail > 0)
- {
- png_size_t space = avail; /* > 0, see above */
-
- if (output != 0 && output_size > count)
- {
- png_size_t copy = output_size - count;
-
- if (space < copy)
- copy = space;
-
- png_memcpy(output + count, png_ptr->zbuf, copy);
- }
- count += space;
- }
-
- if (ret == Z_OK)
- continue;
-
- /* Termination conditions - always reset the zstream, it
- * must be left in inflateInit state.
- */
- png_ptr->zstream.avail_in = 0;
- inflateReset(&png_ptr->zstream);
-
- if (ret == Z_STREAM_END)
- return count; /* NOTE: may be zero. */
-
- /* Now handle the error codes - the API always returns 0
- * and the error message is dumped into the uncompressed
- * buffer if available.
- */
- {
- PNG_CONST char *msg;
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- char umsg[52];
-#endif
- if (png_ptr->zstream.msg != 0)
- msg = png_ptr->zstream.msg;
-
- else
- {
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- switch (ret)
- {
- case Z_BUF_ERROR:
- msg = "Buffer error in compressed datastream in %s chunk";
- break;
-
- case Z_DATA_ERROR:
- msg = "Data error in compressed datastream in %s chunk";
- break;
-
- default:
- msg = "Incomplete compressed datastream in %s chunk";
- break;
- }
-
- png_snprintf(umsg, sizeof umsg, msg, png_ptr->chunk_name);
- msg = umsg;
-#else
- msg = "Damaged compressed datastream in chunk other than IDAT";
-#endif
- }
-
- png_warning(png_ptr, msg);
- }
-
- /* 0 means an error - notice that this code simply ignores
- * zero length compressed chunks as a result.
- */
- return 0;
- }
-}
-
-/*
- * Decompress trailing data in a chunk. The assumption is that chunkdata
- * points at an allocated area holding the contents of a chunk with a
- * trailing compressed part. What we get back is an allocated area
- * holding the original prefix part and an uncompressed version of the
- * trailing part (the malloc area passed in is freed).
- */
-void /* PRIVATE */
-png_decompress_chunk(png_structp png_ptr, int comp_type,
- png_size_t chunklength,
- png_size_t prefix_size, png_size_t *newlength)
-{
- /* The caller should guarantee this */
- if (prefix_size > chunklength)
- {
- /* The recovery is to delete the chunk. */
- png_warning(png_ptr, "invalid chunklength");
- prefix_size = 0; /* To delete everything */
- }
-
- else if (comp_type == PNG_COMPRESSION_TYPE_BASE)
- {
- png_size_t expanded_size = png_inflate(png_ptr,
- (png_bytep)(png_ptr->chunkdata + prefix_size),
- chunklength - prefix_size,
- 0, /*output*/
- 0); /*output size*/
-
- /* Now check the limits on this chunk - if the limit fails the
- * compressed data will be removed, the prefix will remain.
- */
-#ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
- if (png_ptr->user_chunk_malloc_max &&
- (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1))
-#else
-# ifdef PNG_USER_CHUNK_MALLOC_MAX
- if ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
- prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1)
-# endif
-#endif
- png_warning(png_ptr, "Exceeded size limit while expanding chunk");
-
- /* If the size is zero either there was an error and a message
- * has already been output (warning) or the size really is zero
- * and we have nothing to do - the code will exit through the
- * error case below.
- */
-#if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \
- defined(PNG_USER_CHUNK_MALLOC_MAX)
- else if (expanded_size > 0)
-#else
- if (expanded_size > 0)
-#endif
- {
- /* Success (maybe) - really uncompress the chunk. */
- png_size_t new_size = 0;
- png_charp text = png_malloc_warn(png_ptr,
- prefix_size + expanded_size + 1);
-
- if (text != NULL)
- {
- png_memcpy(text, png_ptr->chunkdata, prefix_size);
- new_size = png_inflate(png_ptr,
- (png_bytep)(png_ptr->chunkdata + prefix_size),
- chunklength - prefix_size,
- (png_bytep)(text + prefix_size), expanded_size);
- text[prefix_size + expanded_size] = 0; /* just in case */
-
- if (new_size == expanded_size)
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = text;
- *newlength = prefix_size + expanded_size;
- return; /* The success return! */
- }
-
- png_warning(png_ptr, "png_inflate logic error");
- png_free(png_ptr, text);
- }
-
- else
- png_warning(png_ptr, "Not enough memory to decompress chunk");
- }
- }
-
- else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */
- {
-#ifdef PNG_STDIO_SUPPORTED
- char umsg[50];
-
- png_snprintf(umsg, sizeof umsg,
- "Unknown zTXt compression type %d", comp_type);
- png_warning(png_ptr, umsg);
-#else
- png_warning(png_ptr, "Unknown zTXt compression type");
-#endif
-
- /* The recovery is to simply drop the data. */
- }
-
- /* Generic error return - leave the prefix, delete the compressed
- * data, reallocate the chunkdata to remove the potentially large
- * amount of compressed data.
- */
- {
- png_charp text = png_malloc_warn(png_ptr, prefix_size + 1);
-
- if (text != NULL)
- {
- if (prefix_size > 0)
- png_memcpy(text, png_ptr->chunkdata, prefix_size);
-
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = text;
-
- /* This is an extra zero in the 'uncompressed' part. */
- *(png_ptr->chunkdata + prefix_size) = 0x00;
- }
- /* Ignore a malloc error here - it is safe. */
- }
-
- *newlength = prefix_size;
-}
-#endif
-
-/* Read and check the IDHR chunk */
-void /* PRIVATE */
-png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_byte buf[13];
- png_uint_32 width, height;
- int bit_depth, color_type, compression_type, filter_type;
- int interlace_type;
-
- png_debug(1, "in png_handle_IHDR");
-
- if (png_ptr->mode & PNG_HAVE_IHDR)
- png_error(png_ptr, "Out of place IHDR");
-
- /* Check the length */
- if (length != 13)
- png_error(png_ptr, "Invalid IHDR chunk");
-
- png_ptr->mode |= PNG_HAVE_IHDR;
-
- png_crc_read(png_ptr, buf, 13);
- png_crc_finish(png_ptr, 0);
-
- width = png_get_uint_31(png_ptr, buf);
- height = png_get_uint_31(png_ptr, buf + 4);
- bit_depth = buf[8];
- color_type = buf[9];
- compression_type = buf[10];
- filter_type = buf[11];
- interlace_type = buf[12];
-
- /* Set internal variables */
- png_ptr->width = width;
- png_ptr->height = height;
- png_ptr->bit_depth = (png_byte)bit_depth;
- png_ptr->interlaced = (png_byte)interlace_type;
- png_ptr->color_type = (png_byte)color_type;
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- png_ptr->filter_type = (png_byte)filter_type;
-#endif
- png_ptr->compression_type = (png_byte)compression_type;
-
- /* Find number of channels */
- switch (png_ptr->color_type)
- {
- default: /* invalid, png_set_IHDR calls png_error */
- case PNG_COLOR_TYPE_GRAY:
- case PNG_COLOR_TYPE_PALETTE:
- png_ptr->channels = 1;
- break;
-
- case PNG_COLOR_TYPE_RGB:
- png_ptr->channels = 3;
- break;
-
- case PNG_COLOR_TYPE_GRAY_ALPHA:
- png_ptr->channels = 2;
- break;
-
- case PNG_COLOR_TYPE_RGB_ALPHA:
- png_ptr->channels = 4;
- break;
- }
-
- /* Set up other useful info */
- png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth *
- png_ptr->channels);
- png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width);
- png_debug1(3, "bit_depth = %d", png_ptr->bit_depth);
- png_debug1(3, "channels = %d", png_ptr->channels);
- png_debug1(3, "rowbytes = %lu", (unsigned long)png_ptr->rowbytes);
- png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth,
- color_type, interlace_type, compression_type, filter_type);
-}
-
-/* Read and check the palette */
-void /* PRIVATE */
-png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_color palette[PNG_MAX_PALETTE_LENGTH];
- int num, i;
-#ifdef PNG_POINTER_INDEXING_SUPPORTED
- png_colorp pal_ptr;
-#endif
-
- png_debug(1, "in png_handle_PLTE");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before PLTE");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid PLTE after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (png_ptr->mode & PNG_HAVE_PLTE)
- png_error(png_ptr, "Duplicate PLTE chunk");
-
- png_ptr->mode |= PNG_HAVE_PLTE;
-
- if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
- {
- png_warning(png_ptr,
- "Ignoring PLTE chunk in grayscale PNG");
- png_crc_finish(png_ptr, length);
- return;
- }
-
-#ifndef PNG_READ_OPT_PLTE_SUPPORTED
- if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
- {
- png_crc_finish(png_ptr, length);
- return;
- }
-#endif
-
- if (length > 3*PNG_MAX_PALETTE_LENGTH || length % 3)
- {
- if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
- {
- png_warning(png_ptr, "Invalid palette chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else
- {
- png_error(png_ptr, "Invalid palette chunk");
- }
- }
-
- num = (int)length / 3;
-
-#ifdef PNG_POINTER_INDEXING_SUPPORTED
- for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++)
- {
- png_byte buf[3];
-
- png_crc_read(png_ptr, buf, 3);
- pal_ptr->red = buf[0];
- pal_ptr->green = buf[1];
- pal_ptr->blue = buf[2];
- }
-#else
- for (i = 0; i < num; i++)
- {
- png_byte buf[3];
-
- png_crc_read(png_ptr, buf, 3);
- /* Don't depend upon png_color being any order */
- palette[i].red = buf[0];
- palette[i].green = buf[1];
- palette[i].blue = buf[2];
- }
-#endif
-
- /* If we actually need the PLTE chunk (ie for a paletted image), we do
- * whatever the normal CRC configuration tells us. However, if we
- * have an RGB image, the PLTE can be considered ancillary, so
- * we will act as though it is.
- */
-#ifndef PNG_READ_OPT_PLTE_SUPPORTED
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
-#endif
- {
- png_crc_finish(png_ptr, 0);
- }
-
-#ifndef PNG_READ_OPT_PLTE_SUPPORTED
- else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */
- {
- /* If we don't want to use the data from an ancillary chunk,
- * we have two options: an error abort, or a warning and we
- * ignore the data in this chunk (which should be OK, since
- * it's considered ancillary for a RGB or RGBA image).
- */
- if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE))
- {
- if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)
- {
- png_chunk_benign_error(png_ptr, "CRC error");
- }
-
- else
- {
- png_chunk_warning(png_ptr, "CRC error");
- return;
- }
- }
-
- /* Otherwise, we (optionally) emit a warning and use the chunk. */
- else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN))
- {
- png_chunk_warning(png_ptr, "CRC error");
- }
- }
-#endif
-
- png_set_PLTE(png_ptr, info_ptr, palette, num);
-
-#ifdef PNG_READ_tRNS_SUPPORTED
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
- {
- if (png_ptr->num_trans > (png_uint_16)num)
- {
- png_warning(png_ptr, "Truncating incorrect tRNS chunk length");
- png_ptr->num_trans = (png_uint_16)num;
- }
-
- if (info_ptr->num_trans > (png_uint_16)num)
- {
- png_warning(png_ptr, "Truncating incorrect info tRNS chunk length");
- info_ptr->num_trans = (png_uint_16)num;
- }
- }
- }
-#endif
-
-}
-
-void /* PRIVATE */
-png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_debug(1, "in png_handle_IEND");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT))
- {
- png_error(png_ptr, "No image in file");
- }
-
- png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND);
-
- if (length != 0)
- {
- png_warning(png_ptr, "Incorrect IEND chunk length");
- }
-
- png_crc_finish(png_ptr, length);
-
- PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */
-}
-
-#ifdef PNG_READ_gAMA_SUPPORTED
-void /* PRIVATE */
-png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_fixed_point igamma;
- png_byte buf[4];
-
- png_debug(1, "in png_handle_gAMA");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before gAMA");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid gAMA after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (png_ptr->mode & PNG_HAVE_PLTE)
- /* Should be an error, but we can cope with it */
- png_warning(png_ptr, "Out of place gAMA chunk");
-
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
-#ifdef PNG_READ_sRGB_SUPPORTED
- && !(info_ptr->valid & PNG_INFO_sRGB)
-#endif
- )
- {
- png_warning(png_ptr, "Duplicate gAMA chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (length != 4)
- {
- png_warning(png_ptr, "Incorrect gAMA chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, 4);
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- igamma = png_get_fixed_point(NULL, buf);
-
- /* Check for zero gamma or an error. */
- if (igamma <= 0)
- {
- png_warning(png_ptr,
- "Ignoring gAMA chunk with out of range gamma");
-
- return;
- }
-
-# ifdef PNG_READ_sRGB_SUPPORTED
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB))
- {
- if (PNG_OUT_OF_RANGE(igamma, 45500L, 500))
- {
- png_warning(png_ptr,
- "Ignoring incorrect gAMA value when sRGB is also present");
-
-# ifdef PNG_CONSOLE_IO_SUPPORTED
- fprintf(stderr, "gamma = (%d/100000)", (int)igamma);
-# endif
- return;
- }
- }
-# endif /* PNG_READ_sRGB_SUPPORTED */
-
-# ifdef PNG_READ_GAMMA_SUPPORTED
- /* Gamma correction on read is supported. */
- png_ptr->gamma = igamma;
-# endif
- /* And set the 'info' structure members. */
- png_set_gAMA_fixed(png_ptr, info_ptr, igamma);
-}
-#endif
-
-#ifdef PNG_READ_sBIT_SUPPORTED
-void /* PRIVATE */
-png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_size_t truelen;
- png_byte buf[4];
-
- png_debug(1, "in png_handle_sBIT");
-
- buf[0] = buf[1] = buf[2] = buf[3] = 0;
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before sBIT");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid sBIT after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (png_ptr->mode & PNG_HAVE_PLTE)
- {
- /* Should be an error, but we can cope with it */
- png_warning(png_ptr, "Out of place sBIT chunk");
- }
-
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT))
- {
- png_warning(png_ptr, "Duplicate sBIT chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- truelen = 3;
-
- else
- truelen = (png_size_t)png_ptr->channels;
-
- if (length != truelen || length > 4)
- {
- png_warning(png_ptr, "Incorrect sBIT chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, truelen);
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
- {
- png_ptr->sig_bit.red = buf[0];
- png_ptr->sig_bit.green = buf[1];
- png_ptr->sig_bit.blue = buf[2];
- png_ptr->sig_bit.alpha = buf[3];
- }
-
- else
- {
- png_ptr->sig_bit.gray = buf[0];
- png_ptr->sig_bit.red = buf[0];
- png_ptr->sig_bit.green = buf[0];
- png_ptr->sig_bit.blue = buf[0];
- png_ptr->sig_bit.alpha = buf[1];
- }
-
- png_set_sBIT(png_ptr, info_ptr, &(png_ptr->sig_bit));
-}
-#endif
-
-#ifdef PNG_READ_cHRM_SUPPORTED
-void /* PRIVATE */
-png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_byte buf[32];
- png_fixed_point x_white, y_white, x_red, y_red, x_green, y_green, x_blue,
- y_blue;
-
- png_debug(1, "in png_handle_cHRM");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before cHRM");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid cHRM after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (png_ptr->mode & PNG_HAVE_PLTE)
- /* Should be an error, but we can cope with it */
- png_warning(png_ptr, "Missing PLTE before cHRM");
-
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)
-# ifdef PNG_READ_sRGB_SUPPORTED
- && !(info_ptr->valid & PNG_INFO_sRGB)
-# endif
- )
- {
- png_warning(png_ptr, "Duplicate cHRM chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (length != 32)
- {
- png_warning(png_ptr, "Incorrect cHRM chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, 32);
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- x_white = png_get_fixed_point(NULL, buf);
- y_white = png_get_fixed_point(NULL, buf + 4);
- x_red = png_get_fixed_point(NULL, buf + 8);
- y_red = png_get_fixed_point(NULL, buf + 12);
- x_green = png_get_fixed_point(NULL, buf + 16);
- y_green = png_get_fixed_point(NULL, buf + 20);
- x_blue = png_get_fixed_point(NULL, buf + 24);
- y_blue = png_get_fixed_point(NULL, buf + 28);
-
- if (x_white == PNG_FIXED_ERROR ||
- y_white == PNG_FIXED_ERROR ||
- x_red == PNG_FIXED_ERROR ||
- y_red == PNG_FIXED_ERROR ||
- x_green == PNG_FIXED_ERROR ||
- y_green == PNG_FIXED_ERROR ||
- x_blue == PNG_FIXED_ERROR ||
- y_blue == PNG_FIXED_ERROR)
- {
- png_warning(png_ptr, "Ignoring cHRM chunk with negative chromaticities");
- return;
- }
-
-#ifdef PNG_READ_sRGB_SUPPORTED
- if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB))
- {
- if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) ||
- PNG_OUT_OF_RANGE(y_white, 32900, 1000) ||
- PNG_OUT_OF_RANGE(x_red, 64000L, 1000) ||
- PNG_OUT_OF_RANGE(y_red, 33000, 1000) ||
- PNG_OUT_OF_RANGE(x_green, 30000, 1000) ||
- PNG_OUT_OF_RANGE(y_green, 60000L, 1000) ||
- PNG_OUT_OF_RANGE(x_blue, 15000, 1000) ||
- PNG_OUT_OF_RANGE(y_blue, 6000, 1000))
- {
- png_warning(png_ptr,
- "Ignoring incorrect cHRM value when sRGB is also present");
-
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- fprintf(stderr, "wx=%d, wy=%d, rx=%d, ry=%d\n",
- x_white, y_white, x_red, y_red);
-
- fprintf(stderr, "gx=%d, gy=%d, bx=%d, by=%d\n",
- x_green, y_green, x_blue, y_blue);
-#endif /* PNG_CONSOLE_IO_SUPPORTED */
- }
- return;
- }
-#endif /* PNG_READ_sRGB_SUPPORTED */
-
- png_set_cHRM_fixed(png_ptr, info_ptr, x_white, y_white, x_red, y_red,
- x_green, y_green, x_blue, y_blue);
-}
-#endif
-
-#ifdef PNG_READ_sRGB_SUPPORTED
-void /* PRIVATE */
-png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- int intent;
- png_byte buf[1];
-
- png_debug(1, "in png_handle_sRGB");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before sRGB");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid sRGB after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (png_ptr->mode & PNG_HAVE_PLTE)
- /* Should be an error, but we can cope with it */
- png_warning(png_ptr, "Out of place sRGB chunk");
-
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB))
- {
- png_warning(png_ptr, "Duplicate sRGB chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (length != 1)
- {
- png_warning(png_ptr, "Incorrect sRGB chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, 1);
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- intent = buf[0];
-
- /* Check for bad intent */
- if (intent >= PNG_sRGB_INTENT_LAST)
- {
- png_warning(png_ptr, "Unknown sRGB intent");
- return;
- }
-
-#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA))
- {
- if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500L, 500))
- {
- png_warning(png_ptr,
- "Ignoring incorrect gAMA value when sRGB is also present");
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- fprintf(stderr, "incorrect gamma=(%d/100000)\n", info_ptr->gamma);
-#endif
- }
- }
-#endif /* PNG_READ_gAMA_SUPPORTED */
-
-#ifdef PNG_READ_cHRM_SUPPORTED
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
- if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->x_red, 64000L, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->y_green, 60000L, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000))
- {
- png_warning(png_ptr,
- "Ignoring incorrect cHRM value when sRGB is also present");
- }
-#endif /* PNG_READ_cHRM_SUPPORTED */
-
- png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent);
-}
-#endif /* PNG_READ_sRGB_SUPPORTED */
-
-#ifdef PNG_READ_iCCP_SUPPORTED
-void /* PRIVATE */
-png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-/* Note: this does not properly handle chunks that are > 64K under DOS */
-{
- png_byte compression_type;
- png_bytep pC;
- png_charp profile;
- png_uint_32 skip = 0;
- png_uint_32 profile_size;
- png_alloc_size_t profile_length;
- png_size_t slength, prefix_length, data_length;
-
- png_debug(1, "in png_handle_iCCP");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before iCCP");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid iCCP after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (png_ptr->mode & PNG_HAVE_PLTE)
- /* Should be an error, but we can cope with it */
- png_warning(png_ptr, "Out of place iCCP chunk");
-
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP))
- {
- png_warning(png_ptr, "Duplicate iCCP chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "iCCP chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
-
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
- slength = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
-
- if (png_crc_finish(png_ptr, skip))
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- png_ptr->chunkdata[slength] = 0x00;
-
- for (profile = png_ptr->chunkdata; *profile; profile++)
- /* Empty loop to find end of name */ ;
-
- ++profile;
-
- /* There should be at least one zero (the compression type byte)
- * following the separator, and we should be on it
- */
- if (profile >= png_ptr->chunkdata + slength - 1)
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "Malformed iCCP chunk");
- return;
- }
-
- /* Compression_type should always be zero */
- compression_type = *profile++;
-
- if (compression_type)
- {
- png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk");
- compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8
- wrote nonzero) */
- }
-
- prefix_length = profile - png_ptr->chunkdata;
- png_decompress_chunk(png_ptr, compression_type,
- slength, prefix_length, &data_length);
-
- profile_length = data_length - prefix_length;
-
- if (prefix_length > data_length || profile_length < 4)
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "Profile size field missing from iCCP chunk");
- return;
- }
-
- /* Check the profile_size recorded in the first 32 bits of the ICC profile */
- pC = (png_bytep)(png_ptr->chunkdata + prefix_length);
- profile_size = ((*(pC )) << 24) |
- ((*(pC + 1)) << 16) |
- ((*(pC + 2)) << 8) |
- ((*(pC + 3)) );
-
- /* NOTE: the following guarantees that 'profile_length' fits into 32 bits,
- * because profile_size is a 32 bit value.
- */
- if (profile_size < profile_length)
- profile_length = profile_size;
-
- /* And the following guarantees that profile_size == profile_length. */
- if (profile_size > profile_length)
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
-#ifdef PNG_STDIO_SUPPORTED
- {
- char umsg[80];
-
- png_snprintf2(umsg, 80,
- "Ignoring iCCP chunk with declared size = %u "
- "and actual length = %u",
- (unsigned int) profile_size,
- (unsigned int) profile_length);
- png_warning(png_ptr, umsg);
- }
-#else
- png_warning(png_ptr,
- "Ignoring iCCP chunk with uncompressed size mismatch");
-#endif
- return;
- }
-
- png_set_iCCP(png_ptr, info_ptr, png_ptr->chunkdata,
- compression_type, (png_bytep)png_ptr->chunkdata + prefix_length,
- profile_size);
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
-}
-#endif /* PNG_READ_iCCP_SUPPORTED */
-
-#ifdef PNG_READ_sPLT_SUPPORTED
-void /* PRIVATE */
-png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-/* Note: this does not properly handle chunks that are > 64K under DOS */
-{
- png_bytep entry_start;
- png_sPLT_t new_palette;
- png_sPLT_entryp pp;
- png_uint_32 data_length;
- int entry_size, i;
- png_uint_32 skip = 0;
- png_size_t slength;
- png_uint_32 dl;
- png_size_t max_dl;
-
- png_debug(1, "in png_handle_sPLT");
-
-#ifdef PNG_USER_LIMITS_SUPPORTED
-
- if (png_ptr->user_chunk_cache_max != 0)
- {
- if (png_ptr->user_chunk_cache_max == 1)
- {
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (--png_ptr->user_chunk_cache_max == 1)
- {
- png_warning(png_ptr, "No space in chunk cache for sPLT");
- png_crc_finish(png_ptr, length);
- return;
- }
- }
-#endif
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before sPLT");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid sPLT after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "sPLT chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
-
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
-
- /* WARNING: this may break if size_t is less than 32 bits; it is assumed
- * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a
- * potential breakage point if the types in pngconf.h aren't exactly right.
- */
- slength = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
-
- if (png_crc_finish(png_ptr, skip))
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- png_ptr->chunkdata[slength] = 0x00;
-
- for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start;
- entry_start++)
- /* Empty loop to find end of name */ ;
-
- ++entry_start;
-
- /* A sample depth should follow the separator, and we should be on it */
- if (entry_start > (png_bytep)png_ptr->chunkdata + slength - 2)
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "malformed sPLT chunk");
- return;
- }
-
- new_palette.depth = *entry_start++;
- entry_size = (new_palette.depth == 8 ? 6 : 10);
- /* This must fit in a png_uint_32 because it is derived from the original
- * chunk data length (and use 'length', not 'slength' here for clarity -
- * they are guaranteed to be the same, see the tests above.)
- */
- data_length = length - (png_uint_32)(entry_start -
- (png_bytep)png_ptr->chunkdata);
-
- /* Integrity-check the data length */
- if (data_length % entry_size)
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "sPLT chunk has bad length");
- return;
- }
-
- dl = (png_int_32)(data_length / entry_size);
- max_dl = PNG_SIZE_MAX / png_sizeof(png_sPLT_entry);
-
- if (dl > max_dl)
- {
- png_warning(png_ptr, "sPLT chunk too long");
- return;
- }
-
- new_palette.nentries = (png_int_32)(data_length / entry_size);
-
- new_palette.entries = (png_sPLT_entryp)png_malloc_warn(
- png_ptr, new_palette.nentries * png_sizeof(png_sPLT_entry));
-
- if (new_palette.entries == NULL)
- {
- png_warning(png_ptr, "sPLT chunk requires too much memory");
- return;
- }
-
-#ifdef PNG_POINTER_INDEXING_SUPPORTED
- for (i = 0; i < new_palette.nentries; i++)
- {
- pp = new_palette.entries + i;
-
- if (new_palette.depth == 8)
- {
- pp->red = *entry_start++;
- pp->green = *entry_start++;
- pp->blue = *entry_start++;
- pp->alpha = *entry_start++;
- }
-
- else
- {
- pp->red = png_get_uint_16(entry_start); entry_start += 2;
- pp->green = png_get_uint_16(entry_start); entry_start += 2;
- pp->blue = png_get_uint_16(entry_start); entry_start += 2;
- pp->alpha = png_get_uint_16(entry_start); entry_start += 2;
- }
-
- pp->frequency = png_get_uint_16(entry_start); entry_start += 2;
- }
-#else
- pp = new_palette.entries;
-
- for (i = 0; i < new_palette.nentries; i++)
- {
-
- if (new_palette.depth == 8)
- {
- pp[i].red = *entry_start++;
- pp[i].green = *entry_start++;
- pp[i].blue = *entry_start++;
- pp[i].alpha = *entry_start++;
- }
-
- else
- {
- pp[i].red = png_get_uint_16(entry_start); entry_start += 2;
- pp[i].green = png_get_uint_16(entry_start); entry_start += 2;
- pp[i].blue = png_get_uint_16(entry_start); entry_start += 2;
- pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2;
- }
-
- pp[i].frequency = png_get_uint_16(entry_start); entry_start += 2;
- }
-#endif
-
- /* Discard all chunk data except the name and stash that */
- new_palette.name = png_ptr->chunkdata;
-
- png_set_sPLT(png_ptr, info_ptr, &new_palette, 1);
-
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_free(png_ptr, new_palette.entries);
-}
-#endif /* PNG_READ_sPLT_SUPPORTED */
-
-#ifdef PNG_READ_tRNS_SUPPORTED
-void /* PRIVATE */
-png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_byte readbuf[PNG_MAX_PALETTE_LENGTH];
-
- png_debug(1, "in png_handle_tRNS");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before tRNS");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid tRNS after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
- {
- png_warning(png_ptr, "Duplicate tRNS chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
- {
- png_byte buf[2];
-
- if (length != 2)
- {
- png_warning(png_ptr, "Incorrect tRNS chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, 2);
- png_ptr->num_trans = 1;
- png_ptr->trans_color.gray = png_get_uint_16(buf);
- }
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
- {
- png_byte buf[6];
-
- if (length != 6)
- {
- png_warning(png_ptr, "Incorrect tRNS chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, (png_size_t)length);
- png_ptr->num_trans = 1;
- png_ptr->trans_color.red = png_get_uint_16(buf);
- png_ptr->trans_color.green = png_get_uint_16(buf + 2);
- png_ptr->trans_color.blue = png_get_uint_16(buf + 4);
- }
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (!(png_ptr->mode & PNG_HAVE_PLTE))
- {
- /* Should be an error, but we can cope with it. */
- png_warning(png_ptr, "Missing PLTE before tRNS");
- }
-
- if (length > (png_uint_32)png_ptr->num_palette ||
- length > PNG_MAX_PALETTE_LENGTH)
- {
- png_warning(png_ptr, "Incorrect tRNS chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (length == 0)
- {
- png_warning(png_ptr, "Zero length tRNS chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, readbuf, (png_size_t)length);
- png_ptr->num_trans = (png_uint_16)length;
- }
-
- else
- {
- png_warning(png_ptr, "tRNS chunk not allowed with alpha channel");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (png_crc_finish(png_ptr, 0))
- {
- png_ptr->num_trans = 0;
- return;
- }
-
- png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans,
- &(png_ptr->trans_color));
-}
-#endif
-
-#ifdef PNG_READ_bKGD_SUPPORTED
-void /* PRIVATE */
-png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_size_t truelen;
- png_byte buf[6];
-
- png_debug(1, "in png_handle_bKGD");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before bKGD");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid bKGD after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
- {
- png_warning(png_ptr, "Missing PLTE before bKGD");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD))
- {
- png_warning(png_ptr, "Duplicate bKGD chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- truelen = 1;
-
- else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
- truelen = 6;
-
- else
- truelen = 2;
-
- if (length != truelen)
- {
- png_warning(png_ptr, "Incorrect bKGD chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, truelen);
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- /* We convert the index value into RGB components so that we can allow
- * arbitrary RGB values for background when we have transparency, and
- * so it is easy to determine the RGB values of the background color
- * from the info_ptr struct.
- */
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- png_ptr->background.index = buf[0];
-
- if (info_ptr && info_ptr->num_palette)
- {
- if (buf[0] >= info_ptr->num_palette)
- {
- png_warning(png_ptr, "Incorrect bKGD chunk index value");
- return;
- }
-
- png_ptr->background.red =
- (png_uint_16)png_ptr->palette[buf[0]].red;
-
- png_ptr->background.green =
- (png_uint_16)png_ptr->palette[buf[0]].green;
-
- png_ptr->background.blue =
- (png_uint_16)png_ptr->palette[buf[0]].blue;
- }
- }
-
- else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */
- {
- png_ptr->background.red =
- png_ptr->background.green =
- png_ptr->background.blue =
- png_ptr->background.gray = png_get_uint_16(buf);
- }
-
- else
- {
- png_ptr->background.red = png_get_uint_16(buf);
- png_ptr->background.green = png_get_uint_16(buf + 2);
- png_ptr->background.blue = png_get_uint_16(buf + 4);
- }
-
- png_set_bKGD(png_ptr, info_ptr, &(png_ptr->background));
-}
-#endif
-
-#ifdef PNG_READ_hIST_SUPPORTED
-void /* PRIVATE */
-png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- unsigned int num, i;
- png_uint_16 readbuf[PNG_MAX_PALETTE_LENGTH];
-
- png_debug(1, "in png_handle_hIST");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before hIST");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid hIST after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (!(png_ptr->mode & PNG_HAVE_PLTE))
- {
- png_warning(png_ptr, "Missing PLTE before hIST");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST))
- {
- png_warning(png_ptr, "Duplicate hIST chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- num = length / 2 ;
-
- if (num != (unsigned int)png_ptr->num_palette || num >
- (unsigned int)PNG_MAX_PALETTE_LENGTH)
- {
- png_warning(png_ptr, "Incorrect hIST chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- for (i = 0; i < num; i++)
- {
- png_byte buf[2];
-
- png_crc_read(png_ptr, buf, 2);
- readbuf[i] = png_get_uint_16(buf);
- }
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- png_set_hIST(png_ptr, info_ptr, readbuf);
-}
-#endif
-
-#ifdef PNG_READ_pHYs_SUPPORTED
-void /* PRIVATE */
-png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_byte buf[9];
- png_uint_32 res_x, res_y;
- int unit_type;
-
- png_debug(1, "in png_handle_pHYs");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before pHYs");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid pHYs after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
- {
- png_warning(png_ptr, "Duplicate pHYs chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (length != 9)
- {
- png_warning(png_ptr, "Incorrect pHYs chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, 9);
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- res_x = png_get_uint_32(buf);
- res_y = png_get_uint_32(buf + 4);
- unit_type = buf[8];
- png_set_pHYs(png_ptr, info_ptr, res_x, res_y, unit_type);
-}
-#endif
-
-#ifdef PNG_READ_oFFs_SUPPORTED
-void /* PRIVATE */
-png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_byte buf[9];
- png_int_32 offset_x, offset_y;
- int unit_type;
-
- png_debug(1, "in png_handle_oFFs");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before oFFs");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid oFFs after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
- {
- png_warning(png_ptr, "Duplicate oFFs chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (length != 9)
- {
- png_warning(png_ptr, "Incorrect oFFs chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, 9);
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- offset_x = png_get_int_32(buf);
- offset_y = png_get_int_32(buf + 4);
- unit_type = buf[8];
- png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type);
-}
-#endif
-
-#ifdef PNG_READ_pCAL_SUPPORTED
-/* Read the pCAL chunk (described in the PNG Extensions document) */
-void /* PRIVATE */
-png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_int_32 X0, X1;
- png_byte type, nparams;
- png_charp buf, units, endptr;
- png_charpp params;
- png_size_t slength;
- int i;
-
- png_debug(1, "in png_handle_pCAL");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before pCAL");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid pCAL after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL))
- {
- png_warning(png_ptr, "Duplicate pCAL chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_debug1(2, "Allocating and reading pCAL chunk data (%u bytes)",
- length + 1);
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
-
- if (png_ptr->chunkdata == NULL)
- {
- png_warning(png_ptr, "No memory for pCAL purpose");
- return;
- }
-
- slength = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
-
- if (png_crc_finish(png_ptr, 0))
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
-
- png_debug(3, "Finding end of pCAL purpose string");
- for (buf = png_ptr->chunkdata; *buf; buf++)
- /* Empty loop */ ;
-
- endptr = png_ptr->chunkdata + slength;
-
- /* We need to have at least 12 bytes after the purpose string
- * in order to get the parameter information.
- */
- if (endptr <= buf + 12)
- {
- png_warning(png_ptr, "Invalid pCAL data");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- png_debug(3, "Reading pCAL X0, X1, type, nparams, and units");
- X0 = png_get_int_32((png_bytep)buf+1);
- X1 = png_get_int_32((png_bytep)buf+5);
- type = buf[9];
- nparams = buf[10];
- units = buf + 11;
-
- png_debug(3, "Checking pCAL equation type and number of parameters");
- /* Check that we have the right number of parameters for known
- * equation types.
- */
- if ((type == PNG_EQUATION_LINEAR && nparams != 2) ||
- (type == PNG_EQUATION_BASE_E && nparams != 3) ||
- (type == PNG_EQUATION_ARBITRARY && nparams != 3) ||
- (type == PNG_EQUATION_HYPERBOLIC && nparams != 4))
- {
- png_warning(png_ptr, "Invalid pCAL parameters for equation type");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- else if (type >= PNG_EQUATION_LAST)
- {
- png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
- }
-
- for (buf = units; *buf; buf++)
- /* Empty loop to move past the units string. */ ;
-
- png_debug(3, "Allocating pCAL parameters array");
-
- params = (png_charpp)png_malloc_warn(png_ptr,
- (png_size_t)(nparams * png_sizeof(png_charp)));
-
- if (params == NULL)
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "No memory for pCAL params");
- return;
- }
-
- /* Get pointers to the start of each parameter string. */
- for (i = 0; i < (int)nparams; i++)
- {
- buf++; /* Skip the null string terminator from previous parameter. */
-
- png_debug1(3, "Reading pCAL parameter %d", i);
-
- for (params[i] = buf; buf <= endptr && *buf != 0x00; buf++)
- /* Empty loop to move past each parameter string */ ;
-
- /* Make sure we haven't run out of data yet */
- if (buf > endptr)
- {
- png_warning(png_ptr, "Invalid pCAL data");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_free(png_ptr, params);
- return;
- }
- }
-
- png_set_pCAL(png_ptr, info_ptr, png_ptr->chunkdata, X0, X1, type, nparams,
- units, params);
-
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_free(png_ptr, params);
-}
-#endif
-
-#ifdef PNG_READ_sCAL_SUPPORTED
-/* Read the sCAL chunk */
-void /* PRIVATE */
-png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_size_t slength, i;
- int state;
-
- png_debug(1, "in png_handle_sCAL");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before sCAL");
-
- else if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- png_warning(png_ptr, "Invalid sCAL after IDAT");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL))
- {
- png_warning(png_ptr, "Duplicate sCAL chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_debug1(2, "Allocating and reading sCAL chunk data (%u bytes)",
- length + 1);
-
- png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
-
- if (png_ptr->chunkdata == NULL)
- {
- png_warning(png_ptr, "Out of memory while processing sCAL chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- slength = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
- png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
-
- if (png_crc_finish(png_ptr, 0))
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- /* Validate the unit. */
- if (png_ptr->chunkdata[0] != 1 && png_ptr->chunkdata[0] != 2)
- {
- png_warning(png_ptr, "Invalid sCAL ignored: invalid unit");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- /* Validate the ASCII numbers, need two ASCII numbers separated by
- * a '\0' and they need to fit exactly in the chunk data.
- */
- i = 0;
- state = 0;
-
- if (png_ptr->chunkdata[1] == 45 /* negative width */ ||
- !png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) ||
- i >= slength || png_ptr->chunkdata[i++] != 0)
- png_warning(png_ptr, "Invalid sCAL chunk ignored: bad width format");
-
- else
- {
- png_size_t heighti = i;
-
- if (png_ptr->chunkdata[i] == 45 /* negative height */ ||
- !png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) ||
- i != slength)
- png_warning(png_ptr, "Invalid sCAL chunk ignored: bad height format");
-
- else
- /* This is the (only) success case. */
- png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0],
- png_ptr->chunkdata+1, png_ptr->chunkdata+heighti);
- }
-
- /* Clean up - just free the temporarily allocated buffer. */
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
-}
-#endif
-
-#ifdef PNG_READ_tIME_SUPPORTED
-void /* PRIVATE */
-png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_byte buf[7];
- png_time mod_time;
-
- png_debug(1, "in png_handle_tIME");
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Out of place tIME chunk");
-
- else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME))
- {
- png_warning(png_ptr, "Duplicate tIME chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (png_ptr->mode & PNG_HAVE_IDAT)
- png_ptr->mode |= PNG_AFTER_IDAT;
-
- if (length != 7)
- {
- png_warning(png_ptr, "Incorrect tIME chunk length");
- png_crc_finish(png_ptr, length);
- return;
- }
-
- png_crc_read(png_ptr, buf, 7);
-
- if (png_crc_finish(png_ptr, 0))
- return;
-
- mod_time.second = buf[6];
- mod_time.minute = buf[5];
- mod_time.hour = buf[4];
- mod_time.day = buf[3];
- mod_time.month = buf[2];
- mod_time.year = png_get_uint_16(buf);
-
- png_set_tIME(png_ptr, info_ptr, &mod_time);
-}
-#endif
-
-#ifdef PNG_READ_tEXt_SUPPORTED
-/* Note: this does not properly handle chunks that are > 64K under DOS */
-void /* PRIVATE */
-png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_textp text_ptr;
- png_charp key;
- png_charp text;
- png_uint_32 skip = 0;
- png_size_t slength;
- int ret;
-
- png_debug(1, "in png_handle_tEXt");
-
-#ifdef PNG_USER_LIMITS_SUPPORTED
- if (png_ptr->user_chunk_cache_max != 0)
- {
- if (png_ptr->user_chunk_cache_max == 1)
- {
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (--png_ptr->user_chunk_cache_max == 1)
- {
- png_warning(png_ptr, "No space in chunk cache for tEXt");
- png_crc_finish(png_ptr, length);
- return;
- }
- }
-#endif
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before tEXt");
-
- if (png_ptr->mode & PNG_HAVE_IDAT)
- png_ptr->mode |= PNG_AFTER_IDAT;
-
-#ifdef PNG_MAX_MALLOC_64K
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "tEXt chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
-
- png_free(png_ptr, png_ptr->chunkdata);
-
- png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
-
- if (png_ptr->chunkdata == NULL)
- {
- png_warning(png_ptr, "No memory to process text chunk");
- return;
- }
-
- slength = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
-
- if (png_crc_finish(png_ptr, skip))
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- key = png_ptr->chunkdata;
-
- key[slength] = 0x00;
-
- for (text = key; *text; text++)
- /* Empty loop to find end of key */ ;
-
- if (text != key + slength)
- text++;
-
- text_ptr = (png_textp)png_malloc_warn(png_ptr,
- png_sizeof(png_text));
-
- if (text_ptr == NULL)
- {
- png_warning(png_ptr, "Not enough memory to process text chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
- text_ptr->key = key;
- text_ptr->lang = NULL;
- text_ptr->lang_key = NULL;
- text_ptr->itxt_length = 0;
- text_ptr->text = text;
- text_ptr->text_length = png_strlen(text);
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_free(png_ptr, text_ptr);
-
- if (ret)
- png_warning(png_ptr, "Insufficient memory to process text chunk");
-}
-#endif
-
-#ifdef PNG_READ_zTXt_SUPPORTED
-/* Note: this does not correctly handle chunks that are > 64K under DOS */
-void /* PRIVATE */
-png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_textp text_ptr;
- png_charp text;
- int comp_type;
- int ret;
- png_size_t slength, prefix_len, data_len;
-
- png_debug(1, "in png_handle_zTXt");
-
-#ifdef PNG_USER_LIMITS_SUPPORTED
- if (png_ptr->user_chunk_cache_max != 0)
- {
- if (png_ptr->user_chunk_cache_max == 1)
- {
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (--png_ptr->user_chunk_cache_max == 1)
- {
- png_warning(png_ptr, "No space in chunk cache for zTXt");
- png_crc_finish(png_ptr, length);
- return;
- }
- }
-#endif
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before zTXt");
-
- if (png_ptr->mode & PNG_HAVE_IDAT)
- png_ptr->mode |= PNG_AFTER_IDAT;
-
-#ifdef PNG_MAX_MALLOC_64K
- /* We will no doubt have problems with chunks even half this size, but
- * there is no hard and fast rule to tell us where to stop.
- */
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "zTXt chunk too large to fit in memory");
- png_crc_finish(png_ptr, length);
- return;
- }
-#endif
-
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
-
- if (png_ptr->chunkdata == NULL)
- {
- png_warning(png_ptr, "Out of memory processing zTXt chunk");
- return;
- }
-
- slength = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
-
- if (png_crc_finish(png_ptr, 0))
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- png_ptr->chunkdata[slength] = 0x00;
-
- for (text = png_ptr->chunkdata; *text; text++)
- /* Empty loop */ ;
-
- /* zTXt must have some text after the chunkdataword */
- if (text >= png_ptr->chunkdata + slength - 2)
- {
- png_warning(png_ptr, "Truncated zTXt chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- else
- {
- comp_type = *(++text);
-
- if (comp_type != PNG_TEXT_COMPRESSION_zTXt)
- {
- png_warning(png_ptr, "Unknown compression type in zTXt chunk");
- comp_type = PNG_TEXT_COMPRESSION_zTXt;
- }
-
- text++; /* Skip the compression_method byte */
- }
-
- prefix_len = text - png_ptr->chunkdata;
-
- png_decompress_chunk(png_ptr, comp_type,
- (png_size_t)length, prefix_len, &data_len);
-
- text_ptr = (png_textp)png_malloc_warn(png_ptr,
- png_sizeof(png_text));
-
- if (text_ptr == NULL)
- {
- png_warning(png_ptr, "Not enough memory to process zTXt chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- text_ptr->compression = comp_type;
- text_ptr->key = png_ptr->chunkdata;
- text_ptr->lang = NULL;
- text_ptr->lang_key = NULL;
- text_ptr->itxt_length = 0;
- text_ptr->text = png_ptr->chunkdata + prefix_len;
- text_ptr->text_length = data_len;
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_free(png_ptr, text_ptr);
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
-
- if (ret)
- png_error(png_ptr, "Insufficient memory to store zTXt chunk");
-}
-#endif
-
-#ifdef PNG_READ_iTXt_SUPPORTED
-/* Note: this does not correctly handle chunks that are > 64K under DOS */
-void /* PRIVATE */
-png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_textp text_ptr;
- png_charp key, lang, text, lang_key;
- int comp_flag;
- int comp_type = 0;
- int ret;
- png_size_t slength, prefix_len, data_len;
-
- png_debug(1, "in png_handle_iTXt");
-
-#ifdef PNG_USER_LIMITS_SUPPORTED
- if (png_ptr->user_chunk_cache_max != 0)
- {
- if (png_ptr->user_chunk_cache_max == 1)
- {
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (--png_ptr->user_chunk_cache_max == 1)
- {
- png_warning(png_ptr, "No space in chunk cache for iTXt");
- png_crc_finish(png_ptr, length);
- return;
- }
- }
-#endif
-
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before iTXt");
-
- if (png_ptr->mode & PNG_HAVE_IDAT)
- png_ptr->mode |= PNG_AFTER_IDAT;
-
-#ifdef PNG_MAX_MALLOC_64K
- /* We will no doubt have problems with chunks even half this size, but
- * there is no hard and fast rule to tell us where to stop.
- */
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "iTXt chunk too large to fit in memory");
- png_crc_finish(png_ptr, length);
- return;
- }
-#endif
-
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
-
- if (png_ptr->chunkdata == NULL)
- {
- png_warning(png_ptr, "No memory to process iTXt chunk");
- return;
- }
-
- slength = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
-
- if (png_crc_finish(png_ptr, 0))
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- png_ptr->chunkdata[slength] = 0x00;
-
- for (lang = png_ptr->chunkdata; *lang; lang++)
- /* Empty loop */ ;
-
- lang++; /* Skip NUL separator */
-
- /* iTXt must have a language tag (possibly empty), two compression bytes,
- * translated keyword (possibly empty), and possibly some text after the
- * keyword
- */
-
- if (lang >= png_ptr->chunkdata + slength - 3)
- {
- png_warning(png_ptr, "Truncated iTXt chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- else
- {
- comp_flag = *lang++;
- comp_type = *lang++;
- }
-
- for (lang_key = lang; *lang_key; lang_key++)
- /* Empty loop */ ;
-
- lang_key++; /* Skip NUL separator */
-
- if (lang_key >= png_ptr->chunkdata + slength)
- {
- png_warning(png_ptr, "Truncated iTXt chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- for (text = lang_key; *text; text++)
- /* Empty loop */ ;
-
- text++; /* Skip NUL separator */
-
- if (text >= png_ptr->chunkdata + slength)
- {
- png_warning(png_ptr, "Malformed iTXt chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- prefix_len = text - png_ptr->chunkdata;
-
- key=png_ptr->chunkdata;
-
- if (comp_flag)
- png_decompress_chunk(png_ptr, comp_type,
- (size_t)length, prefix_len, &data_len);
-
- else
- data_len = png_strlen(png_ptr->chunkdata + prefix_len);
-
- text_ptr = (png_textp)png_malloc_warn(png_ptr,
- png_sizeof(png_text));
-
- if (text_ptr == NULL)
- {
- png_warning(png_ptr, "Not enough memory to process iTXt chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-
- text_ptr->compression = (int)comp_flag + 1;
- text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key);
- text_ptr->lang = png_ptr->chunkdata + (lang - key);
- text_ptr->itxt_length = data_len;
- text_ptr->text_length = 0;
- text_ptr->key = png_ptr->chunkdata;
- text_ptr->text = png_ptr->chunkdata + prefix_len;
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_free(png_ptr, text_ptr);
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
-
- if (ret)
- png_error(png_ptr, "Insufficient memory to store iTXt chunk");
-}
-#endif
-
-/* This function is called when we haven't found a handler for a
- * chunk. If there isn't a problem with the chunk itself (ie bad
- * chunk name, CRC, or a critical chunk), the chunk is silently ignored
- * -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which
- * case it will be saved away to be written out later.
- */
-void /* PRIVATE */
-png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-{
- png_uint_32 skip = 0;
-
- png_debug(1, "in png_handle_unknown");
-
-#ifdef PNG_USER_LIMITS_SUPPORTED
- if (png_ptr->user_chunk_cache_max != 0)
- {
- if (png_ptr->user_chunk_cache_max == 1)
- {
- png_crc_finish(png_ptr, length);
- return;
- }
-
- if (--png_ptr->user_chunk_cache_max == 1)
- {
- png_warning(png_ptr, "No space in chunk cache for unknown chunk");
- png_crc_finish(png_ptr, length);
- return;
- }
- }
-#endif
-
- if (png_ptr->mode & PNG_HAVE_IDAT)
- {
- PNG_IDAT;
-
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* Not an IDAT */
- png_ptr->mode |= PNG_AFTER_IDAT;
- }
-
- if (!(png_ptr->chunk_name[0] & 0x20))
- {
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- && png_ptr->read_user_chunk_fn == NULL
-#endif
- )
-#endif
- png_chunk_error(png_ptr, "unknown critical chunk");
- }
-
-#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
- if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- || (png_ptr->read_user_chunk_fn != NULL)
-#endif
- )
- {
-#ifdef PNG_MAX_MALLOC_64K
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "unknown chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
-
- png_memcpy((png_charp)png_ptr->unknown_chunk.name,
- (png_charp)png_ptr->chunk_name,
- png_sizeof(png_ptr->unknown_chunk.name));
-
- png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1]
- = '\0';
-
- png_ptr->unknown_chunk.size = (png_size_t)length;
-
- if (length == 0)
- png_ptr->unknown_chunk.data = NULL;
-
- else
- {
- png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
- png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
- }
-
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- if (png_ptr->read_user_chunk_fn != NULL)
- {
- /* Callback to user unknown chunk handler */
- int ret;
-
- ret = (*(png_ptr->read_user_chunk_fn))
- (png_ptr, &png_ptr->unknown_chunk);
-
- if (ret < 0)
- png_chunk_error(png_ptr, "error in user chunk");
-
- if (ret == 0)
- {
- if (!(png_ptr->chunk_name[0] & 0x20))
- {
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS)
-#endif
- png_chunk_error(png_ptr, "unknown critical chunk");
- }
-
- png_set_unknown_chunks(png_ptr, info_ptr,
- &png_ptr->unknown_chunk, 1);
- }
- }
-
- else
-#endif
- png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
-
- png_free(png_ptr, png_ptr->unknown_chunk.data);
- png_ptr->unknown_chunk.data = NULL;
- }
-
- else
-#endif
- skip = length;
-
- png_crc_finish(png_ptr, skip);
-
-#ifndef PNG_READ_USER_CHUNKS_SUPPORTED
- PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */
-#endif
-}
-
-/* This function is called to verify that a chunk name is valid.
- * This function can't have the "critical chunk check" incorporated
- * into it, since in the future we will need to be able to call user
- * functions to handle unknown critical chunks after we check that
- * the chunk name itself is valid.
- */
-
-#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
-
-void /* PRIVATE */
-png_check_chunk_name(png_structp png_ptr, png_const_bytep chunk_name)
-{
- png_debug(1, "in png_check_chunk_name");
- if (isnonalpha(chunk_name[0]) || isnonalpha(chunk_name[1]) ||
- isnonalpha(chunk_name[2]) || isnonalpha(chunk_name[3]))
- {
- png_chunk_error(png_ptr, "invalid chunk type");
- }
-}
-
-/* Combines the row recently read in with the existing pixels in the
- * row. This routine takes care of alpha and transparency if requested.
- * This routine also handles the two methods of progressive display
- * of interlaced images, depending on the mask value.
- * The mask value describes which pixels are to be combined with
- * the row. The pattern always repeats every 8 pixels, so just 8
- * bits are needed. A one indicates the pixel is to be combined,
- * a zero indicates the pixel is to be skipped. This is in addition
- * to any alpha or transparency value associated with the pixel. If
- * you want all pixels to be combined, pass 0xff (255) in mask.
- */
-
-void /* PRIVATE */
-png_combine_row(png_structp png_ptr, png_bytep row, int mask)
-{
- png_debug(1, "in png_combine_row");
-
- if (mask == 0xff)
- {
- png_memcpy(row, png_ptr->row_buf + 1,
- PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width));
- }
-
- else
- {
- switch (png_ptr->row_info.pixel_depth)
- {
- case 1:
- {
- png_bytep sp = png_ptr->row_buf + 1;
- png_bytep dp = row;
- int s_inc, s_start, s_end;
- int m = 0x80;
- int shift;
- png_uint_32 i;
- png_uint_32 row_width = png_ptr->width;
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 7;
- s_inc = 1;
- }
-
- else
-#endif
- {
- s_start = 7;
- s_end = 0;
- s_inc = -1;
- }
-
- shift = s_start;
-
- for (i = 0; i < row_width; i++)
- {
- if (m & mask)
- {
- int value;
-
- value = (*sp >> shift) & 0x01;
- *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
-
- else
- shift += s_inc;
-
- if (m == 1)
- m = 0x80;
-
- else
- m >>= 1;
- }
- break;
- }
-
- case 2:
- {
- png_bytep sp = png_ptr->row_buf + 1;
- png_bytep dp = row;
- int s_start, s_end, s_inc;
- int m = 0x80;
- int shift;
- png_uint_32 i;
- png_uint_32 row_width = png_ptr->width;
- int value;
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 6;
- s_inc = 2;
- }
-
- else
-#endif
- {
- s_start = 6;
- s_end = 0;
- s_inc = -2;
- }
-
- shift = s_start;
-
- for (i = 0; i < row_width; i++)
- {
- if (m & mask)
- {
- value = (*sp >> shift) & 0x03;
- *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
-
- else
- shift += s_inc;
-
- if (m == 1)
- m = 0x80;
-
- else
- m >>= 1;
- }
- break;
- }
-
- case 4:
- {
- png_bytep sp = png_ptr->row_buf + 1;
- png_bytep dp = row;
- int s_start, s_end, s_inc;
- int m = 0x80;
- int shift;
- png_uint_32 i;
- png_uint_32 row_width = png_ptr->width;
- int value;
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 4;
- s_inc = 4;
- }
-
- else
-#endif
- {
- s_start = 4;
- s_end = 0;
- s_inc = -4;
- }
- shift = s_start;
-
- for (i = 0; i < row_width; i++)
- {
- if (m & mask)
- {
- value = (*sp >> shift) & 0xf;
- *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
-
- else
- shift += s_inc;
-
- if (m == 1)
- m = 0x80;
-
- else
- m >>= 1;
- }
- break;
- }
-
- default:
- {
- png_bytep sp = png_ptr->row_buf + 1;
- png_bytep dp = row;
- png_size_t pixel_bytes = (png_ptr->row_info.pixel_depth >> 3);
- png_uint_32 i;
- png_uint_32 row_width = png_ptr->width;
- png_byte m = 0x80;
-
- for (i = 0; i < row_width; i++)
- {
- if (m & mask)
- {
- png_memcpy(dp, sp, pixel_bytes);
- }
-
- sp += pixel_bytes;
- dp += pixel_bytes;
-
- if (m == 1)
- m = 0x80;
-
- else
- m >>= 1;
- }
- break;
- }
- }
- }
-}
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
-void /* PRIVATE */
-png_do_read_interlace(png_structp png_ptr)
-{
- png_row_infop row_info = &(png_ptr->row_info);
- png_bytep row = png_ptr->row_buf + 1;
- int pass = png_ptr->pass;
- png_uint_32 transformations = png_ptr->transformations;
- /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
- /* Offset to next interlace block */
- PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
-
- png_debug(1, "in png_do_read_interlace");
- if (row != NULL && row_info != NULL)
- {
- png_uint_32 final_width;
-
- final_width = row_info->width * png_pass_inc[pass];
-
- switch (row_info->pixel_depth)
- {
- case 1:
- {
- png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 3);
- png_bytep dp = row + (png_size_t)((final_width - 1) >> 3);
- int sshift, dshift;
- int s_start, s_end, s_inc;
- int jstop = png_pass_inc[pass];
- png_byte v;
- png_uint_32 i;
- int j;
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (int)((row_info->width + 7) & 0x07);
- dshift = (int)((final_width + 7) & 0x07);
- s_start = 7;
- s_end = 0;
- s_inc = -1;
- }
-
- else
-#endif
- {
- sshift = 7 - (int)((row_info->width + 7) & 0x07);
- dshift = 7 - (int)((final_width + 7) & 0x07);
- s_start = 0;
- s_end = 7;
- s_inc = 1;
- }
-
- for (i = 0; i < row_info->width; i++)
- {
- v = (png_byte)((*sp >> sshift) & 0x01);
- for (j = 0; j < jstop; j++)
- {
- *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
-
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
-
- else
- dshift += s_inc;
- }
-
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
-
- else
- sshift += s_inc;
- }
- break;
- }
-
- case 2:
- {
- png_bytep sp = row + (png_uint_32)((row_info->width - 1) >> 2);
- png_bytep dp = row + (png_uint_32)((final_width - 1) >> 2);
- int sshift, dshift;
- int s_start, s_end, s_inc;
- int jstop = png_pass_inc[pass];
- png_uint_32 i;
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (int)(((row_info->width + 3) & 0x03) << 1);
- dshift = (int)(((final_width + 3) & 0x03) << 1);
- s_start = 6;
- s_end = 0;
- s_inc = -2;
- }
-
- else
-#endif
- {
- sshift = (int)((3 - ((row_info->width + 3) & 0x03)) << 1);
- dshift = (int)((3 - ((final_width + 3) & 0x03)) << 1);
- s_start = 0;
- s_end = 6;
- s_inc = 2;
- }
-
- for (i = 0; i < row_info->width; i++)
- {
- png_byte v;
- int j;
-
- v = (png_byte)((*sp >> sshift) & 0x03);
- for (j = 0; j < jstop; j++)
- {
- *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
-
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
-
- else
- dshift += s_inc;
- }
-
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
-
- else
- sshift += s_inc;
- }
- break;
- }
-
- case 4:
- {
- png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 1);
- png_bytep dp = row + (png_size_t)((final_width - 1) >> 1);
- int sshift, dshift;
- int s_start, s_end, s_inc;
- png_uint_32 i;
- int jstop = png_pass_inc[pass];
-
-#ifdef PNG_READ_PACKSWAP_SUPPORTED
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (int)(((row_info->width + 1) & 0x01) << 2);
- dshift = (int)(((final_width + 1) & 0x01) << 2);
- s_start = 4;
- s_end = 0;
- s_inc = -4;
- }
-
- else
-#endif
- {
- sshift = (int)((1 - ((row_info->width + 1) & 0x01)) << 2);
- dshift = (int)((1 - ((final_width + 1) & 0x01)) << 2);
- s_start = 0;
- s_end = 4;
- s_inc = 4;
- }
-
- for (i = 0; i < row_info->width; i++)
- {
- png_byte v = (png_byte)((*sp >> sshift) & 0xf);
- int j;
-
- for (j = 0; j < jstop; j++)
- {
- *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
-
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
-
- else
- dshift += s_inc;
- }
-
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
-
- else
- sshift += s_inc;
- }
- break;
- }
- default:
- {
- png_size_t pixel_bytes = (row_info->pixel_depth >> 3);
-
- png_bytep sp = row + (png_size_t)(row_info->width - 1)
- * pixel_bytes;
-
- png_bytep dp = row + (png_size_t)(final_width - 1) * pixel_bytes;
-
- int jstop = png_pass_inc[pass];
- png_uint_32 i;
-
- for (i = 0; i < row_info->width; i++)
- {
- png_byte v[8];
- int j;
-
- png_memcpy(v, sp, pixel_bytes);
-
- for (j = 0; j < jstop; j++)
- {
- png_memcpy(dp, v, pixel_bytes);
- dp -= pixel_bytes;
- }
-
- sp -= pixel_bytes;
- }
- break;
- }
- }
- row_info->width = final_width;
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width);
- }
-#ifndef PNG_READ_PACKSWAP_SUPPORTED
- PNG_UNUSED(transformations) /* Silence compiler warning */
-#endif
-}
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
-
-void /* PRIVATE */
-png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
- png_const_bytep prev_row, int filter)
-{
- png_debug(1, "in png_read_filter_row");
- png_debug2(2, "row = %u, filter = %d", png_ptr->row_number, filter);
- switch (filter)
- {
- case PNG_FILTER_VALUE_NONE:
- break;
-
- case PNG_FILTER_VALUE_SUB:
- {
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
- unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
- png_bytep rp = row + bpp;
- png_bytep lp = row;
-
- for (i = bpp; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff);
- rp++;
- }
- break;
- }
- case PNG_FILTER_VALUE_UP:
- {
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
- png_bytep rp = row;
- png_const_bytep pp = prev_row;
-
- for (i = 0; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
- rp++;
- }
- break;
- }
- case PNG_FILTER_VALUE_AVG:
- {
- png_size_t i;
- png_bytep rp = row;
- png_const_bytep pp = prev_row;
- png_bytep lp = row;
- unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
- png_size_t istop = row_info->rowbytes - bpp;
-
- for (i = 0; i < bpp; i++)
- {
- *rp = (png_byte)(((int)(*rp) +
- ((int)(*pp++) / 2 )) & 0xff);
-
- rp++;
- }
-
- for (i = 0; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) +
- (int)(*pp++ + *lp++) / 2 ) & 0xff);
-
- rp++;
- }
- break;
- }
- case PNG_FILTER_VALUE_PAETH:
- {
- png_size_t i;
- png_bytep rp = row;
- png_const_bytep pp = prev_row;
- png_bytep lp = row;
- png_const_bytep cp = prev_row;
- unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
- png_size_t istop=row_info->rowbytes - bpp;
-
- for (i = 0; i < bpp; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
- rp++;
- }
-
- for (i = 0; i < istop; i++) /* Use leftover rp,pp */
- {
- int a, b, c, pa, pb, pc, p;
-
- a = *lp++;
- b = *pp++;
- c = *cp++;
-
- p = b - c;
- pc = a - c;
-
-#ifdef PNG_USE_ABS
- pa = abs(p);
- pb = abs(pc);
- pc = abs(p + pc);
-#else
- pa = p < 0 ? -p : p;
- pb = pc < 0 ? -pc : pc;
- pc = (p + pc) < 0 ? -(p + pc) : p + pc;
-#endif
-
- /*
- if (pa <= pb && pa <= pc)
- p = a;
-
- else if (pb <= pc)
- p = b;
-
- else
- p = c;
- */
-
- p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c;
-
- *rp = (png_byte)(((int)(*rp) + p) & 0xff);
- rp++;
- }
- break;
- }
- default:
- png_error(png_ptr, "Ignoring bad adaptive filter type");
- /*NOT REACHED */
- break;
- }
-}
-
-#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-void /* PRIVATE */
-png_read_finish_row(png_structp png_ptr)
-{
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-
- /* Start of interlace block */
- PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
-
- /* Offset to next interlace block */
- PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
-
- /* Start of interlace block in the y direction */
- PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
-
- /* Offset to next interlace block in the y direction */
- PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
-
- png_debug(1, "in png_read_finish_row");
- png_ptr->row_number++;
- if (png_ptr->row_number < png_ptr->num_rows)
- return;
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- if (png_ptr->interlaced)
- {
- png_ptr->row_number = 0;
-
- png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
-
- do
- {
- png_ptr->pass++;
-
- if (png_ptr->pass >= 7)
- break;
-
- png_ptr->iwidth = (png_ptr->width +
- png_pass_inc[png_ptr->pass] - 1 -
- png_pass_start[png_ptr->pass]) /
- png_pass_inc[png_ptr->pass];
-
- if (!(png_ptr->transformations & PNG_INTERLACE))
- {
- png_ptr->num_rows = (png_ptr->height +
- png_pass_yinc[png_ptr->pass] - 1 -
- png_pass_ystart[png_ptr->pass]) /
- png_pass_yinc[png_ptr->pass];
- }
-
- else /* if (png_ptr->transformations & PNG_INTERLACE) */
- break; /* libpng deinterlacing sees every row */
-
- } while (png_ptr->num_rows == 0 || png_ptr->iwidth == 0);
-
- if (png_ptr->pass < 7)
- return;
- }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
-
- if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
- {
- PNG_IDAT;
- char extra;
- int ret;
-
- png_ptr->zstream.next_out = (Byte *)&extra;
- png_ptr->zstream.avail_out = (uInt)1;
-
- for (;;)
- {
- if (!(png_ptr->zstream.avail_in))
- {
- while (!png_ptr->idat_size)
- {
- png_crc_finish(png_ptr, 0);
- png_ptr->idat_size = png_read_chunk_header(png_ptr);
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- png_error(png_ptr, "Not enough image data");
- }
-
- png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_in = png_ptr->zbuf;
-
- if (png_ptr->zbuf_size > png_ptr->idat_size)
- png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size;
-
- png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in);
- png_ptr->idat_size -= png_ptr->zstream.avail_in;
- }
-
- ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
-
- if (ret == Z_STREAM_END)
- {
- if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in ||
- png_ptr->idat_size)
- png_warning(png_ptr, "Extra compressed data");
-
- png_ptr->mode |= PNG_AFTER_IDAT;
- png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
- break;
- }
-
- if (ret != Z_OK)
- png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg :
- "Decompression Error");
-
- if (!(png_ptr->zstream.avail_out))
- {
- png_warning(png_ptr, "Extra compressed data");
- png_ptr->mode |= PNG_AFTER_IDAT;
- png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
- break;
- }
-
- }
- png_ptr->zstream.avail_out = 0;
- }
-
- if (png_ptr->idat_size || png_ptr->zstream.avail_in)
- png_warning(png_ptr, "Extra compression data");
-
- inflateReset(&png_ptr->zstream);
-
- png_ptr->mode |= PNG_AFTER_IDAT;
-}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
-
-void /* PRIVATE */
-png_read_start_row(png_structp png_ptr)
-{
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-
- /* Start of interlace block */
- PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
-
- /* Offset to next interlace block */
- PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
-
- /* Start of interlace block in the y direction */
- PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
-
- /* Offset to next interlace block in the y direction */
- PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
-#endif
-
- int max_pixel_depth;
- png_size_t row_bytes;
-
- png_debug(1, "in png_read_start_row");
- png_ptr->zstream.avail_in = 0;
- png_init_read_transformations(png_ptr);
-#ifdef PNG_READ_INTERLACING_SUPPORTED
- if (png_ptr->interlaced)
- {
- if (!(png_ptr->transformations & PNG_INTERLACE))
- png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
- png_pass_ystart[0]) / png_pass_yinc[0];
-
- else
- png_ptr->num_rows = png_ptr->height;
-
- png_ptr->iwidth = (png_ptr->width +
- png_pass_inc[png_ptr->pass] - 1 -
- png_pass_start[png_ptr->pass]) /
- png_pass_inc[png_ptr->pass];
- }
-
- else
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
- {
- png_ptr->num_rows = png_ptr->height;
- png_ptr->iwidth = png_ptr->width;
- }
-
- max_pixel_depth = png_ptr->pixel_depth;
-
-#ifdef PNG_READ_PACK_SUPPORTED
- if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8)
- max_pixel_depth = 8;
-#endif
-
-#ifdef PNG_READ_EXPAND_SUPPORTED
- if (png_ptr->transformations & PNG_EXPAND)
- {
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (png_ptr->num_trans)
- max_pixel_depth = 32;
-
- else
- max_pixel_depth = 24;
- }
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
- {
- if (max_pixel_depth < 8)
- max_pixel_depth = 8;
-
- if (png_ptr->num_trans)
- max_pixel_depth *= 2;
- }
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
- {
- if (png_ptr->num_trans)
- {
- max_pixel_depth *= 4;
- max_pixel_depth /= 3;
- }
- }
- }
-#endif
-
-#ifdef PNG_READ_EXPAND_16_SUPPORTED
- if (png_ptr->transformations & PNG_EXPAND_16)
- {
-# ifdef PNG_READ_EXPAND_SUPPORTED
- /* In fact it is an error if it isn't supported, but checking is
- * the safe way.
- */
- if (png_ptr->transformations & PNG_EXPAND)
- {
- if (png_ptr->bit_depth < 16)
- max_pixel_depth *= 2;
- }
- else
-# endif
- png_ptr->transformations &= ~PNG_EXPAND_16;
- }
-#endif
-
-#ifdef PNG_READ_FILLER_SUPPORTED
- if (png_ptr->transformations & (PNG_FILLER))
- {
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- max_pixel_depth = 32;
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
- {
- if (max_pixel_depth <= 8)
- max_pixel_depth = 16;
-
- else
- max_pixel_depth = 32;
- }
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
- {
- if (max_pixel_depth <= 32)
- max_pixel_depth = 32;
-
- else
- max_pixel_depth = 64;
- }
- }
-#endif
-
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
- if (png_ptr->transformations & PNG_GRAY_TO_RGB)
- {
- if (
-#ifdef PNG_READ_EXPAND_SUPPORTED
- (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) ||
-#endif
-#ifdef PNG_READ_FILLER_SUPPORTED
- (png_ptr->transformations & (PNG_FILLER)) ||
-#endif
- png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- {
- if (max_pixel_depth <= 16)
- max_pixel_depth = 32;
-
- else
- max_pixel_depth = 64;
- }
-
- else
- {
- if (max_pixel_depth <= 8)
- {
- if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- max_pixel_depth = 32;
-
- else
- max_pixel_depth = 24;
- }
-
- else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- max_pixel_depth = 64;
-
- else
- max_pixel_depth = 48;
- }
- }
-#endif
-
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \
-defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
- if (png_ptr->transformations & PNG_USER_TRANSFORM)
- {
- int user_pixel_depth = png_ptr->user_transform_depth*
- png_ptr->user_transform_channels;
-
- if (user_pixel_depth > max_pixel_depth)
- max_pixel_depth=user_pixel_depth;
- }
-#endif
-
- /* Align the width on the next larger 8 pixels. Mainly used
- * for interlacing
- */
- row_bytes = ((png_ptr->width + 7) & ~((png_uint_32)7));
- /* Calculate the maximum bytes needed, adding a byte and a pixel
- * for safety's sake
- */
- row_bytes = PNG_ROWBYTES(max_pixel_depth, row_bytes) +
- 1 + ((max_pixel_depth + 7) >> 3);
-
-#ifdef PNG_MAX_MALLOC_64K
- if (row_bytes > (png_uint_32)65536L)
- png_error(png_ptr, "This image requires a row greater than 64KB");
-#endif
-
- if (row_bytes + 48 > png_ptr->old_big_row_buf_size)
- {
- png_free(png_ptr, png_ptr->big_row_buf);
-
- if (png_ptr->interlaced)
- png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr,
- row_bytes + 48);
-
- else
- png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr,
- row_bytes + 48);
-
- png_ptr->old_big_row_buf_size = row_bytes + 48;
-
-#ifdef PNG_ALIGNED_MEMORY_SUPPORTED
- /* Use 16-byte aligned memory for row_buf with at least 16 bytes
- * of padding before and after row_buf.
- */
- png_ptr->row_buf = png_ptr->big_row_buf + 32 -
- (((png_alloc_size_t)png_ptr->big_row_buf + 15) & 0x0F);
-
- png_ptr->old_big_row_buf_size = row_bytes + 48;
-#else
- /* Use 32 bytes of padding before and 16 bytes after row_buf. */
- png_ptr->row_buf = png_ptr->big_row_buf + 32;
-#endif
- png_ptr->old_big_row_buf_size = row_bytes + 48;
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- if (png_ptr->rowbytes > 65535)
- png_error(png_ptr, "This image requires a row greater than 64KB");
-
-#endif
- if (png_ptr->rowbytes > (PNG_SIZE_MAX - 1))
- png_error(png_ptr, "Row has too many bytes to allocate in memory");
-
- if (png_ptr->rowbytes + 1 > png_ptr->old_prev_row_size)
- {
- png_free(png_ptr, png_ptr->prev_row);
-
- png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1);
-
- png_ptr->old_prev_row_size = png_ptr->rowbytes + 1;
- }
-
- png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
-
- png_debug1(3, "width = %u,", png_ptr->width);
- png_debug1(3, "height = %u,", png_ptr->height);
- png_debug1(3, "iwidth = %u,", png_ptr->iwidth);
- png_debug1(3, "num_rows = %u,", png_ptr->num_rows);
- png_debug1(3, "rowbytes = %lu,", (unsigned long)png_ptr->rowbytes);
- png_debug1(3, "irowbytes = %lu",
- (unsigned long)PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1);
-
- png_ptr->flags |= PNG_FLAG_ROW_INIT;
-}
-#endif /* PNG_READ_SUPPORTED */
+++ /dev/null
-
-/* pngset.c - storage of image information into info struct
- *
- * Last changed in libpng 1.5.1 [February 3, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * The functions here are used during reads to store data from the file
- * into the info struct, and during writes to store application data
- * into the info struct for writing into the file. This abstracts the
- * info struct and allows us to change the structure in the future.
- */
-
-#include "pngpriv.h"
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-
-#ifdef PNG_bKGD_SUPPORTED
-void PNGAPI
-png_set_bKGD(png_structp png_ptr, png_infop info_ptr,
- png_const_color_16p background)
-{
- png_debug1(1, "in %s storage function", "bKGD");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
- info_ptr->valid |= PNG_INFO_bKGD;
-}
-#endif
-
-#ifdef PNG_cHRM_SUPPORTED
-void PNGFAPI
-png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
- png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
- png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
- png_fixed_point blue_x, png_fixed_point blue_y)
-{
- png_debug1(1, "in %s storage function", "cHRM fixed");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
-# ifdef PNG_CHECK_cHRM_SUPPORTED
- if (png_check_cHRM_fixed(png_ptr,
- white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
-# endif
- {
- info_ptr->x_white = white_x;
- info_ptr->y_white = white_y;
- info_ptr->x_red = red_x;
- info_ptr->y_red = red_y;
- info_ptr->x_green = green_x;
- info_ptr->y_green = green_y;
- info_ptr->x_blue = blue_x;
- info_ptr->y_blue = blue_y;
- info_ptr->valid |= PNG_INFO_cHRM;
- }
-}
-
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-void PNGAPI
-png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
- double white_x, double white_y, double red_x, double red_y,
- double green_x, double green_y, double blue_x, double blue_y)
-{
- png_set_cHRM_fixed(png_ptr, info_ptr,
- png_fixed(png_ptr, white_x, "cHRM White X"),
- png_fixed(png_ptr, white_y, "cHRM White Y"),
- png_fixed(png_ptr, red_x, "cHRM Red X"),
- png_fixed(png_ptr, red_y, "cHRM Red Y"),
- png_fixed(png_ptr, green_x, "cHRM Green X"),
- png_fixed(png_ptr, green_y, "cHRM Green Y"),
- png_fixed(png_ptr, blue_x, "cHRM Blue X"),
- png_fixed(png_ptr, blue_y, "cHRM Blue Y"));
-}
-# endif /* PNG_FLOATING_POINT_SUPPORTED */
-
-#endif /* PNG_cHRM_SUPPORTED */
-
-#ifdef PNG_gAMA_SUPPORTED
-void PNGFAPI
-png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
- file_gamma)
-{
- png_debug1(1, "in %s storage function", "gAMA");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- /* Previously these values were limited, however they must be
- * wrong, therefore storing them (and setting PNG_INFO_gAMA)
- * must be wrong too.
- */
- if (file_gamma > (png_fixed_point)PNG_UINT_31_MAX)
- png_warning(png_ptr, "Gamma too large, ignored");
-
- else if (file_gamma <= 0)
- png_warning(png_ptr, "Negative or zero gamma ignored");
-
- else
- {
- info_ptr->gamma = file_gamma;
- info_ptr->valid |= PNG_INFO_gAMA;
- }
-}
-
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-void PNGAPI
-png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
-{
- png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma,
- "png_set_gAMA"));
-}
-# endif
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
-void PNGAPI
-png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist)
-{
- int i;
-
- png_debug1(1, "in %s storage function", "hIST");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- if (info_ptr->num_palette == 0 || info_ptr->num_palette
- > PNG_MAX_PALETTE_LENGTH)
- {
- png_warning(png_ptr,
- "Invalid palette size, hIST allocation skipped");
-
- return;
- }
-
- png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
-
- /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
- * version 1.2.1
- */
- png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
- PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));
-
- if (png_ptr->hist == NULL)
- {
- png_warning(png_ptr, "Insufficient memory for hIST chunk data");
- return;
- }
-
- for (i = 0; i < info_ptr->num_palette; i++)
- png_ptr->hist[i] = hist[i];
-
- info_ptr->hist = png_ptr->hist;
- info_ptr->valid |= PNG_INFO_hIST;
- info_ptr->free_me |= PNG_FREE_HIST;
-}
-#endif
-
-void PNGAPI
-png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 width, png_uint_32 height, int bit_depth,
- int color_type, int interlace_type, int compression_type,
- int filter_type)
-{
- png_debug1(1, "in %s storage function", "IHDR");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- info_ptr->width = width;
- info_ptr->height = height;
- info_ptr->bit_depth = (png_byte)bit_depth;
- info_ptr->color_type = (png_byte)color_type;
- info_ptr->compression_type = (png_byte)compression_type;
- info_ptr->filter_type = (png_byte)filter_type;
- info_ptr->interlace_type = (png_byte)interlace_type;
-
- png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
- info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
- info_ptr->compression_type, info_ptr->filter_type);
-
- if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- info_ptr->channels = 1;
-
- else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
- info_ptr->channels = 3;
-
- else
- info_ptr->channels = 1;
-
- if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
- info_ptr->channels++;
-
- info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
-
- /* Check for potential overflow */
- if (width >
- (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */
- - 48 /* bigrowbuf hack */
- - 1 /* filter byte */
- - 7*8 /* rounding of width to multiple of 8 pixels */
- - 8) /* extra max_pixel_depth pad */
- info_ptr->rowbytes = 0;
- else
- info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
-}
-
-#ifdef PNG_oFFs_SUPPORTED
-void PNGAPI
-png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
- png_int_32 offset_x, png_int_32 offset_y, int unit_type)
-{
- png_debug1(1, "in %s storage function", "oFFs");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- info_ptr->x_offset = offset_x;
- info_ptr->y_offset = offset_y;
- info_ptr->offset_unit_type = (png_byte)unit_type;
- info_ptr->valid |= PNG_INFO_oFFs;
-}
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
-void PNGAPI
-png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
- png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
- int nparams, png_const_charp units, png_charpp params)
-{
- png_size_t length;
- int i;
-
- png_debug1(1, "in %s storage function", "pCAL");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- length = png_strlen(purpose) + 1;
- png_debug1(3, "allocating purpose for info (%lu bytes)",
- (unsigned long)length);
-
- /* TODO: validate format of calibration name and unit name */
-
- /* Check that the type matches the specification. */
- if (type < 0 || type > 3)
- png_error(png_ptr, "Invalid pCAL equation type");
-
- /* Validate params[nparams] */
- for (i=0; i<nparams; ++i)
- if (!png_check_fp_string(params[i], png_strlen(params[i])))
- png_error(png_ptr, "Invalid format for pCAL parameter");
-
- info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
-
- if (info_ptr->pcal_purpose == NULL)
- {
- png_warning(png_ptr, "Insufficient memory for pCAL purpose");
- return;
- }
-
- png_memcpy(info_ptr->pcal_purpose, purpose, length);
-
- png_debug(3, "storing X0, X1, type, and nparams in info");
- info_ptr->pcal_X0 = X0;
- info_ptr->pcal_X1 = X1;
- info_ptr->pcal_type = (png_byte)type;
- info_ptr->pcal_nparams = (png_byte)nparams;
-
- length = png_strlen(units) + 1;
- png_debug1(3, "allocating units for info (%lu bytes)",
- (unsigned long)length);
-
- info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
-
- if (info_ptr->pcal_units == NULL)
- {
- png_warning(png_ptr, "Insufficient memory for pCAL units");
- return;
- }
-
- png_memcpy(info_ptr->pcal_units, units, length);
-
- info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
- (png_size_t)((nparams + 1) * png_sizeof(png_charp)));
-
- if (info_ptr->pcal_params == NULL)
- {
- png_warning(png_ptr, "Insufficient memory for pCAL params");
- return;
- }
-
- png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
-
- for (i = 0; i < nparams; i++)
- {
- length = png_strlen(params[i]) + 1;
- png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
- (unsigned long)length);
-
- info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
-
- if (info_ptr->pcal_params[i] == NULL)
- {
- png_warning(png_ptr, "Insufficient memory for pCAL parameter");
- return;
- }
-
- png_memcpy(info_ptr->pcal_params[i], params[i], length);
- }
-
- info_ptr->valid |= PNG_INFO_pCAL;
- info_ptr->free_me |= PNG_FREE_PCAL;
-}
-#endif
-
-#ifdef PNG_sCAL_SUPPORTED
-void PNGAPI
-png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
- int unit, png_const_charp swidth, png_const_charp sheight)
-{
- png_size_t lengthw = 0, lengthh = 0;
-
- png_debug1(1, "in %s storage function", "sCAL");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- /* Double check the unit (should never get here with an invalid
- * unit unless this is an API call.)
- */
- if (unit != 1 && unit != 2)
- png_error(png_ptr, "Invalid sCAL unit");
-
- if (swidth == NULL || (lengthw = png_strlen(swidth)) <= 0 ||
- swidth[0] == 45 /*'-'*/ || !png_check_fp_string(swidth, lengthw))
- png_error(png_ptr, "Invalid sCAL width");
-
- if (sheight == NULL || (lengthh = png_strlen(sheight)) <= 0 ||
- sheight[0] == 45 /*'-'*/ || !png_check_fp_string(sheight, lengthh))
- png_error(png_ptr, "Invalid sCAL height");
-
- info_ptr->scal_unit = (png_byte)unit;
-
- ++lengthw;
-
- png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw);
-
- info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw);
-
- if (info_ptr->scal_s_width == NULL)
- {
- png_warning(png_ptr, "Memory allocation failed while processing sCAL");
- return;
- }
-
- png_memcpy(info_ptr->scal_s_width, swidth, lengthw);
-
- ++lengthh;
-
- png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh);
-
- info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh);
-
- if (info_ptr->scal_s_height == NULL)
- {
- png_free (png_ptr, info_ptr->scal_s_width);
- info_ptr->scal_s_width = NULL;
-
- png_warning(png_ptr, "Memory allocation failed while processing sCAL");
- return;
- }
-
- png_memcpy(info_ptr->scal_s_height, sheight, lengthh);
-
- info_ptr->valid |= PNG_INFO_sCAL;
- info_ptr->free_me |= PNG_FREE_SCAL;
-}
-
-# ifdef PNG_FLOATING_POINT_SUPPORTED
-void PNGAPI
-png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width,
- double height)
-{
- png_debug1(1, "in %s storage function", "sCAL");
-
- /* Check the arguments. */
- if (width <= 0)
- png_warning(png_ptr, "Invalid sCAL width ignored");
-
- else if (height <= 0)
- png_warning(png_ptr, "Invalid sCAL height ignored");
-
- else
- {
- /* Convert 'width' and 'height' to ASCII. */
- char swidth[PNG_sCAL_MAX_DIGITS+1];
- char sheight[PNG_sCAL_MAX_DIGITS+1];
-
- png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width,
- PNG_sCAL_PRECISION);
- png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height,
- PNG_sCAL_PRECISION);
-
- png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
- }
-}
-# endif
-
-# ifdef PNG_FIXED_POINT_SUPPORTED
-void PNGAPI
-png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit,
- png_fixed_point width, png_fixed_point height)
-{
- png_debug1(1, "in %s storage function", "sCAL");
-
- /* Check the arguments. */
- if (width <= 0)
- png_warning(png_ptr, "Invalid sCAL width ignored");
-
- else if (height <= 0)
- png_warning(png_ptr, "Invalid sCAL height ignored");
-
- else
- {
- /* Convert 'width' and 'height' to ASCII. */
- char swidth[PNG_sCAL_MAX_DIGITS+1];
- char sheight[PNG_sCAL_MAX_DIGITS+1];
-
- png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width);
- png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height);
-
- png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
- }
-}
-# endif
-#endif
-
-#ifdef PNG_pHYs_SUPPORTED
-void PNGAPI
-png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 res_x, png_uint_32 res_y, int unit_type)
-{
- png_debug1(1, "in %s storage function", "pHYs");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- info_ptr->x_pixels_per_unit = res_x;
- info_ptr->y_pixels_per_unit = res_y;
- info_ptr->phys_unit_type = (png_byte)unit_type;
- info_ptr->valid |= PNG_INFO_pHYs;
-}
-#endif
-
-void PNGAPI
-png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
- png_const_colorp palette, int num_palette)
-{
-
- png_debug1(1, "in %s storage function", "PLTE");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
- {
- if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- png_error(png_ptr, "Invalid palette length");
-
- else
- {
- png_warning(png_ptr, "Invalid palette length");
- return;
- }
- }
-
- /* It may not actually be necessary to set png_ptr->palette here;
- * we do it for backward compatibility with the way the png_handle_tRNS
- * function used to do the allocation.
- */
- png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
-
- /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
- * of num_palette entries, in case of an invalid PNG file that has
- * too-large sample values.
- */
- png_ptr->palette = (png_colorp)png_calloc(png_ptr,
- PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
-
- png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
- info_ptr->palette = png_ptr->palette;
- info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
-
- info_ptr->free_me |= PNG_FREE_PLTE;
-
- info_ptr->valid |= PNG_INFO_PLTE;
-}
-
-#ifdef PNG_sBIT_SUPPORTED
-void PNGAPI
-png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
- png_const_color_8p sig_bit)
-{
- png_debug1(1, "in %s storage function", "sBIT");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
- info_ptr->valid |= PNG_INFO_sBIT;
-}
-#endif
-
-#ifdef PNG_sRGB_SUPPORTED
-void PNGAPI
-png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent)
-{
- png_debug1(1, "in %s storage function", "sRGB");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- info_ptr->srgb_intent = (png_byte)srgb_intent;
- info_ptr->valid |= PNG_INFO_sRGB;
-}
-
-void PNGAPI
-png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
- int srgb_intent)
-{
- png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- png_set_sRGB(png_ptr, info_ptr, srgb_intent);
-
-# ifdef PNG_gAMA_SUPPORTED
- png_set_gAMA_fixed(png_ptr, info_ptr, 45455L);
-# endif
-
-# ifdef PNG_cHRM_SUPPORTED
- png_set_cHRM_fixed(png_ptr, info_ptr,
- /* color x y */
- /* white */ 31270L, 32900L,
- /* red */ 64000L, 33000L,
- /* green */ 30000L, 60000L,
- /* blue */ 15000L, 6000L
- );
-# endif /* cHRM */
-}
-#endif /* sRGB */
-
-
-#ifdef PNG_iCCP_SUPPORTED
-void PNGAPI
-png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
- png_const_charp name, int compression_type,
- png_const_bytep profile, png_uint_32 proflen)
-{
- png_charp new_iccp_name;
- png_bytep new_iccp_profile;
- png_uint_32 length;
-
- png_debug1(1, "in %s storage function", "iCCP");
-
- if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
- return;
-
- length = png_strlen(name)+1;
- new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
-
- if (new_iccp_name == NULL)
- {
- png_warning(png_ptr, "Insufficient memory to process iCCP chunk");
- return;
- }
-
- png_memcpy(new_iccp_name, name, length);
- new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen);
-
- if (new_iccp_profile == NULL)
- {
- png_free (png_ptr, new_iccp_name);
- png_warning(png_ptr,
- "Insufficient memory to process iCCP profile");
- return;
- }
-
- png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
-
- png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
-
- info_ptr->iccp_proflen = proflen;
- info_ptr->iccp_name = new_iccp_name;
- info_ptr->iccp_profile = new_iccp_profile;
- /* Compression is always zero but is here so the API and info structure
- * does not have to change if we introduce multiple compression types
- */
- info_ptr->iccp_compression = (png_byte)compression_type;
- info_ptr->free_me |= PNG_FREE_ICCP;
- info_ptr->valid |= PNG_INFO_iCCP;
-}
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED
-void PNGAPI
-png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr,
- int num_text)
-{
- int ret;
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
-
- if (ret)
- png_error(png_ptr, "Insufficient memory to store text");
-}
-
-int /* PRIVATE */
-png_set_text_2(png_structp png_ptr, png_infop info_ptr,
- png_const_textp text_ptr, int num_text)
-{
- int i;
-
- png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
- png_ptr->chunk_name[0] == '\0') ?
- "text" : (png_const_charp)png_ptr->chunk_name));
-
- if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
- return(0);
-
- /* Make sure we have enough space in the "text" array in info_struct
- * to hold all of the incoming text_ptr objects.
- */
- if (info_ptr->num_text + num_text > info_ptr->max_text)
- {
- if (info_ptr->text != NULL)
- {
- png_textp old_text;
- int old_max;
-
- old_max = info_ptr->max_text;
- info_ptr->max_text = info_ptr->num_text + num_text + 8;
- old_text = info_ptr->text;
- info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
- (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
-
- if (info_ptr->text == NULL)
- {
- png_free(png_ptr, old_text);
- return(1);
- }
-
- png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
- png_sizeof(png_text)));
- png_free(png_ptr, old_text);
- }
-
- else
- {
- info_ptr->max_text = num_text + 8;
- info_ptr->num_text = 0;
- info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
- (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
- if (info_ptr->text == NULL)
- return(1);
- info_ptr->free_me |= PNG_FREE_TEXT;
- }
-
- png_debug1(3, "allocated %d entries for info_ptr->text",
- info_ptr->max_text);
- }
- for (i = 0; i < num_text; i++)
- {
- png_size_t text_length, key_len;
- png_size_t lang_len, lang_key_len;
- png_textp textp = &(info_ptr->text[info_ptr->num_text]);
-
- if (text_ptr[i].key == NULL)
- continue;
-
- if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
- text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
- {
- png_warning(png_ptr, "text compression mode is out of range");
- continue;
- }
-
- key_len = png_strlen(text_ptr[i].key);
-
- if (text_ptr[i].compression <= 0)
- {
- lang_len = 0;
- lang_key_len = 0;
- }
-
- else
-# ifdef PNG_iTXt_SUPPORTED
- {
- /* Set iTXt data */
-
- if (text_ptr[i].lang != NULL)
- lang_len = png_strlen(text_ptr[i].lang);
-
- else
- lang_len = 0;
-
- if (text_ptr[i].lang_key != NULL)
- lang_key_len = png_strlen(text_ptr[i].lang_key);
-
- else
- lang_key_len = 0;
- }
-# else /* PNG_iTXt_SUPPORTED */
- {
- png_warning(png_ptr, "iTXt chunk not supported");
- continue;
- }
-# endif
-
- if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
- {
- text_length = 0;
-# ifdef PNG_iTXt_SUPPORTED
- if (text_ptr[i].compression > 0)
- textp->compression = PNG_ITXT_COMPRESSION_NONE;
-
- else
-# endif
- textp->compression = PNG_TEXT_COMPRESSION_NONE;
- }
-
- else
- {
- text_length = png_strlen(text_ptr[i].text);
- textp->compression = text_ptr[i].compression;
- }
-
- textp->key = (png_charp)png_malloc_warn(png_ptr,
- (png_size_t)
- (key_len + text_length + lang_len + lang_key_len + 4));
-
- if (textp->key == NULL)
- return(1);
-
- png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
- (unsigned long)(png_uint_32)
- (key_len + lang_len + lang_key_len + text_length + 4),
- textp->key);
-
- png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
- *(textp->key + key_len) = '\0';
-
- if (text_ptr[i].compression > 0)
- {
- textp->lang = textp->key + key_len + 1;
- png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
- *(textp->lang + lang_len) = '\0';
- textp->lang_key = textp->lang + lang_len + 1;
- png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
- *(textp->lang_key + lang_key_len) = '\0';
- textp->text = textp->lang_key + lang_key_len + 1;
- }
-
- else
- {
- textp->lang=NULL;
- textp->lang_key=NULL;
- textp->text = textp->key + key_len + 1;
- }
-
- if (text_length)
- png_memcpy(textp->text, text_ptr[i].text,
- (png_size_t)(text_length));
-
- *(textp->text + text_length) = '\0';
-
-# ifdef PNG_iTXt_SUPPORTED
- if (textp->compression > 0)
- {
- textp->text_length = 0;
- textp->itxt_length = text_length;
- }
-
- else
-# endif
- {
- textp->text_length = text_length;
- textp->itxt_length = 0;
- }
-
- info_ptr->num_text++;
- png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
- }
- return(0);
-}
-#endif
-
-#ifdef PNG_tIME_SUPPORTED
-void PNGAPI
-png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
-{
- png_debug1(1, "in %s storage function", "tIME");
-
- if (png_ptr == NULL || info_ptr == NULL ||
- (png_ptr->mode & PNG_WROTE_tIME))
- return;
-
- png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
- info_ptr->valid |= PNG_INFO_tIME;
-}
-#endif
-
-#ifdef PNG_tRNS_SUPPORTED
-void PNGAPI
-png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
- png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
-{
- png_debug1(1, "in %s storage function", "tRNS");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- if (trans_alpha != NULL)
- {
- /* It may not actually be necessary to set png_ptr->trans_alpha here;
- * we do it for backward compatibility with the way the png_handle_tRNS
- * function used to do the allocation.
- */
-
- png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
-
- /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
- png_ptr->trans_alpha = info_ptr->trans_alpha =
- (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH);
-
- if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
- png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
- }
-
- if (trans_color != NULL)
- {
- int sample_max = (1 << info_ptr->bit_depth);
-
- if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
- (int)trans_color->gray > sample_max) ||
- (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
- ((int)trans_color->red > sample_max ||
- (int)trans_color->green > sample_max ||
- (int)trans_color->blue > sample_max)))
- png_warning(png_ptr,
- "tRNS chunk has out-of-range samples for bit_depth");
-
- png_memcpy(&(info_ptr->trans_color), trans_color,
- png_sizeof(png_color_16));
-
- if (num_trans == 0)
- num_trans = 1;
- }
-
- info_ptr->num_trans = (png_uint_16)num_trans;
-
- if (num_trans != 0)
- {
- info_ptr->valid |= PNG_INFO_tRNS;
- info_ptr->free_me |= PNG_FREE_TRNS;
- }
-}
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
-void PNGAPI
-png_set_sPLT(png_structp png_ptr,
- png_infop info_ptr, png_const_sPLT_tp entries, int nentries)
-/*
- * entries - array of png_sPLT_t structures
- * to be added to the list of palettes
- * in the info structure.
- *
- * nentries - number of palette structures to be
- * added.
- */
-{
- png_sPLT_tp np;
- int i;
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- np = (png_sPLT_tp)png_malloc_warn(png_ptr,
- (info_ptr->splt_palettes_num + nentries) *
- (png_size_t)png_sizeof(png_sPLT_t));
-
- if (np == NULL)
- {
- png_warning(png_ptr, "No memory for sPLT palettes");
- return;
- }
-
- png_memcpy(np, info_ptr->splt_palettes,
- info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
-
- png_free(png_ptr, info_ptr->splt_palettes);
- info_ptr->splt_palettes=NULL;
-
- for (i = 0; i < nentries; i++)
- {
- png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
- png_const_sPLT_tp from = entries + i;
- png_uint_32 length;
-
- length = png_strlen(from->name) + 1;
- to->name = (png_charp)png_malloc_warn(png_ptr, (png_size_t)length);
-
- if (to->name == NULL)
- {
- png_warning(png_ptr,
- "Out of memory while processing sPLT chunk");
- continue;
- }
-
- png_memcpy(to->name, from->name, length);
- to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
- (png_size_t)(from->nentries * png_sizeof(png_sPLT_entry)));
-
- if (to->entries == NULL)
- {
- png_warning(png_ptr,
- "Out of memory while processing sPLT chunk");
- png_free(png_ptr, to->name);
- to->name = NULL;
- continue;
- }
-
- png_memcpy(to->entries, from->entries,
- from->nentries * png_sizeof(png_sPLT_entry));
-
- to->nentries = from->nentries;
- to->depth = from->depth;
- }
-
- info_ptr->splt_palettes = np;
- info_ptr->splt_palettes_num += nentries;
- info_ptr->valid |= PNG_INFO_sPLT;
- info_ptr->free_me |= PNG_FREE_SPLT;
-}
-#endif /* PNG_sPLT_SUPPORTED */
-
-#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
-void PNGAPI
-png_set_unknown_chunks(png_structp png_ptr,
- png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
-{
- png_unknown_chunkp np;
- int i;
-
- if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
- return;
-
- np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
- (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
- png_sizeof(png_unknown_chunk));
-
- if (np == NULL)
- {
- png_warning(png_ptr,
- "Out of memory while processing unknown chunk");
- return;
- }
-
- png_memcpy(np, info_ptr->unknown_chunks,
- (png_size_t)info_ptr->unknown_chunks_num *
- png_sizeof(png_unknown_chunk));
-
- png_free(png_ptr, info_ptr->unknown_chunks);
- info_ptr->unknown_chunks = NULL;
-
- for (i = 0; i < num_unknowns; i++)
- {
- png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
- png_const_unknown_chunkp from = unknowns + i;
-
- png_memcpy(to->name, from->name, png_sizeof(from->name));
- to->name[png_sizeof(to->name)-1] = '\0';
- to->size = from->size;
-
- /* Note our location in the read or write sequence */
- to->location = (png_byte)(png_ptr->mode & 0xff);
-
- if (from->size == 0)
- to->data=NULL;
-
- else
- {
- to->data = (png_bytep)png_malloc_warn(png_ptr,
- (png_size_t)from->size);
-
- if (to->data == NULL)
- {
- png_warning(png_ptr,
- "Out of memory while processing unknown chunk");
- to->size = 0;
- }
-
- else
- png_memcpy(to->data, from->data, from->size);
- }
- }
-
- info_ptr->unknown_chunks = np;
- info_ptr->unknown_chunks_num += num_unknowns;
- info_ptr->free_me |= PNG_FREE_UNKN;
-}
-
-void PNGAPI
-png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
- int chunk, int location)
-{
- if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
- info_ptr->unknown_chunks_num)
- info_ptr->unknown_chunks[chunk].location = (png_byte)location;
-}
-#endif
-
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
-png_uint_32 PNGAPI
-png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
-{
- png_debug(1, "in png_permit_mng_features");
-
- if (png_ptr == NULL)
- return (png_uint_32)0;
-
- png_ptr->mng_features_permitted =
- (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
-
- return (png_uint_32)png_ptr->mng_features_permitted;
-}
-#endif
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-void PNGAPI
-png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep
- chunk_list, int num_chunks)
-{
- png_bytep new_list, p;
- int i, old_num_chunks;
- if (png_ptr == NULL)
- return;
-
- if (num_chunks == 0)
- {
- if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
- png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
-
- else
- png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
-
- if (keep == PNG_HANDLE_CHUNK_ALWAYS)
- png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
-
- else
- png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
-
- return;
- }
-
- if (chunk_list == NULL)
- return;
-
- old_num_chunks = png_ptr->num_chunk_list;
- new_list=(png_bytep)png_malloc(png_ptr,
- (png_size_t)(5*(num_chunks + old_num_chunks)));
-
- if (png_ptr->chunk_list != NULL)
- {
- png_memcpy(new_list, png_ptr->chunk_list,
- (png_size_t)(5*old_num_chunks));
- png_free(png_ptr, png_ptr->chunk_list);
- png_ptr->chunk_list=NULL;
- }
-
- png_memcpy(new_list + 5*old_num_chunks, chunk_list,
- (png_size_t)(5*num_chunks));
-
- for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
- *p=(png_byte)keep;
-
- png_ptr->num_chunk_list = old_num_chunks + num_chunks;
- png_ptr->chunk_list = new_list;
- png_ptr->free_me |= PNG_FREE_LIST;
-}
-#endif
-
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
-void PNGAPI
-png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
- png_user_chunk_ptr read_user_chunk_fn)
-{
- png_debug(1, "in png_set_read_user_chunk_fn");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->read_user_chunk_fn = read_user_chunk_fn;
- png_ptr->user_chunk_ptr = user_chunk_ptr;
-}
-#endif
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
-void PNGAPI
-png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
-{
- png_debug1(1, "in %s storage function", "rows");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
- png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
-
- info_ptr->row_pointers = row_pointers;
-
- if (row_pointers)
- info_ptr->valid |= PNG_INFO_IDAT;
-}
-#endif
-
-void PNGAPI
-png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
-{
- if (png_ptr == NULL)
- return;
-
- png_free(png_ptr, png_ptr->zbuf);
-
- if (size > ZLIB_IO_MAX)
- {
- png_warning(png_ptr, "Attempt to set buffer size beyond max ignored");
- png_ptr->zbuf_size = ZLIB_IO_MAX;
- size = ZLIB_IO_MAX; /* must fit */
- }
-
- else
- png_ptr->zbuf_size = (uInt)size;
-
- png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
-
- /* The following ensures a relatively safe failure if this gets called while
- * the buffer is actually in use.
- */
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = 0;
- png_ptr->zstream.avail_in = 0;
-}
-
-void PNGAPI
-png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
-{
- if (png_ptr && info_ptr)
- info_ptr->valid &= ~mask;
-}
-
-
-
-#ifdef PNG_SET_USER_LIMITS_SUPPORTED
-/* This function was added to libpng 1.2.6 */
-void PNGAPI
-png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
- png_uint_32 user_height_max)
-{
- /* Images with dimensions larger than these limits will be
- * rejected by png_set_IHDR(). To accept any PNG datastream
- * regardless of dimensions, set both limits to 0x7ffffffL.
- */
- if (png_ptr == NULL)
- return;
-
- png_ptr->user_width_max = user_width_max;
- png_ptr->user_height_max = user_height_max;
-}
-
-/* This function was added to libpng 1.4.0 */
-void PNGAPI
-png_set_chunk_cache_max (png_structp png_ptr,
- png_uint_32 user_chunk_cache_max)
-{
- if (png_ptr)
- png_ptr->user_chunk_cache_max = user_chunk_cache_max;
-}
-
-/* This function was added to libpng 1.4.1 */
-void PNGAPI
-png_set_chunk_malloc_max (png_structp png_ptr,
- png_alloc_size_t user_chunk_malloc_max)
-{
- if (png_ptr)
- png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
-}
-#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
-
-
-#ifdef PNG_BENIGN_ERRORS_SUPPORTED
-void PNGAPI
-png_set_benign_errors(png_structp png_ptr, int allowed)
-{
- png_debug(1, "in png_set_benign_errors");
-
- if (allowed)
- png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
-
- else
- png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
-}
-#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+++ /dev/null
-
-/* pngstruct.h - header file for PNG reference library
- *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * Last changed in libpng 1.5.0 [January 6, 2011]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-/* The structure that holds the information to read and write PNG files.
- * The only people who need to care about what is inside of this are the
- * people who will be modifying the library for their own special needs.
- * It should NOT be accessed directly by an application.
- */
-
-#ifndef PNGSTRUCT_H
-#define PNGSTRUCT_H
-/* zlib.h defines the structure z_stream, an instance of which is included
- * in this structure and is required for decompressing the LZ compressed
- * data in PNG files.
- */
-#include "zlib.h"
-
-struct png_struct_def
-{
-#ifdef PNG_SETJMP_SUPPORTED
- jmp_buf png_jmpbuf; /* used in png_error */
- png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */
-#endif
- png_error_ptr error_fn; /* function for printing errors and aborting */
- png_error_ptr warning_fn; /* function for printing warnings */
- png_voidp error_ptr; /* user supplied struct for error functions */
- png_rw_ptr write_data_fn; /* function for writing output data */
- png_rw_ptr read_data_fn; /* function for reading input data */
- png_voidp io_ptr; /* ptr to application struct for I/O functions */
-
-#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
- png_user_transform_ptr read_user_transform_fn; /* user read transform */
-#endif
-
-#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
- png_user_transform_ptr write_user_transform_fn; /* user write transform */
-#endif
-
-/* These were added in libpng-1.0.2 */
-#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
- png_voidp user_transform_ptr; /* user supplied struct for user transform */
- png_byte user_transform_depth; /* bit depth of user transformed pixels */
- png_byte user_transform_channels; /* channels in user transformed pixels */
-#endif
-#endif
-
- png_uint_32 mode; /* tells us where we are in the PNG file */
- png_uint_32 flags; /* flags indicating various things to libpng */
- png_uint_32 transformations; /* which transformations to perform */
-
- z_stream zstream; /* pointer to decompression structure (below) */
- png_bytep zbuf; /* buffer for zlib */
- uInt zbuf_size; /* size of zbuf (typically 65536) */
- int zlib_level; /* holds zlib compression level */
- int zlib_method; /* holds zlib compression method */
- int zlib_window_bits; /* holds zlib compression window bits */
- int zlib_mem_level; /* holds zlib compression memory level */
- int zlib_strategy; /* holds zlib compression strategy */
-
- png_uint_32 width; /* width of image in pixels */
- png_uint_32 height; /* height of image in pixels */
- png_uint_32 num_rows; /* number of rows in current pass */
- png_uint_32 usr_width; /* width of row at start of write */
- png_size_t rowbytes; /* size of row in bytes */
- png_uint_32 iwidth; /* width of current interlaced row in pixels */
- png_uint_32 row_number; /* current row in interlace pass */
- png_bytep prev_row; /* buffer to save previous (unfiltered) row */
- png_bytep row_buf; /* buffer to save current (unfiltered) row */
- png_bytep sub_row; /* buffer to save "sub" row when filtering */
- png_bytep up_row; /* buffer to save "up" row when filtering */
- png_bytep avg_row; /* buffer to save "avg" row when filtering */
- png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
- png_row_info row_info; /* used for transformation routines */
-
- png_uint_32 idat_size; /* current IDAT size for read */
- png_uint_32 crc; /* current chunk CRC value */
- png_colorp palette; /* palette from the input file */
- png_uint_16 num_palette; /* number of color entries in palette */
- png_uint_16 num_trans; /* number of transparency values */
- png_byte chunk_name[5]; /* null-terminated name of current chunk */
- png_byte compression; /* file compression type (always 0) */
- png_byte filter; /* file filter type (always 0) */
- png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
- png_byte pass; /* current interlace pass (0 - 6) */
- png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */
- png_byte color_type; /* color type of file */
- png_byte bit_depth; /* bit depth of file */
- png_byte usr_bit_depth; /* bit depth of users row */
- png_byte pixel_depth; /* number of bits per pixel */
- png_byte channels; /* number of channels in file */
- png_byte usr_channels; /* channels at start of write */
- png_byte sig_bytes; /* magic bytes read/written from start of file */
-
-#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
- png_uint_16 filler; /* filler bytes for pixel expansion */
-#endif
-
-#ifdef PNG_bKGD_SUPPORTED
- png_byte background_gamma_type;
- png_fixed_point background_gamma;
- png_color_16 background; /* background color in screen gamma space */
-#ifdef PNG_READ_GAMMA_SUPPORTED
- png_color_16 background_1; /* background normalized to gamma 1.0 */
-#endif
-#endif /* PNG_bKGD_SUPPORTED */
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
- png_flush_ptr output_flush_fn; /* Function for flushing output */
- png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */
- png_uint_32 flush_rows; /* number of rows written since last flush */
-#endif
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */
- png_fixed_point gamma; /* file gamma value */
- png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */
-#endif
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- png_bytep gamma_table; /* gamma table for 8-bit depth files */
- png_bytep gamma_from_1; /* converts from 1.0 to screen */
- png_bytep gamma_to_1; /* converts from file to 1.0 */
- png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
- png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */
- png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
-#endif
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
- png_color_8 sig_bit; /* significant bits in each available channel */
-#endif
-
-#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
- png_color_8 shift; /* shift for significant bit tranformation */
-#endif
-
-#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
- || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- png_bytep trans_alpha; /* alpha values for paletted files */
- png_color_16 trans_color; /* transparent color for non-paletted files */
-#endif
-
- png_read_status_ptr read_row_fn; /* called after each row is decoded */
- png_write_status_ptr write_row_fn; /* called after each row is encoded */
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
- png_progressive_info_ptr info_fn; /* called after header data fully read */
- png_progressive_row_ptr row_fn; /* called after a prog. row is decoded */
- png_progressive_end_ptr end_fn; /* called after image is complete */
- png_bytep save_buffer_ptr; /* current location in save_buffer */
- png_bytep save_buffer; /* buffer for previously read data */
- png_bytep current_buffer_ptr; /* current location in current_buffer */
- png_bytep current_buffer; /* buffer for recently used data */
- png_uint_32 push_length; /* size of current input chunk */
- png_uint_32 skip_length; /* bytes to skip in input data */
- png_size_t save_buffer_size; /* amount of data now in save_buffer */
- png_size_t save_buffer_max; /* total size of save_buffer */
- png_size_t buffer_size; /* total amount of available input data */
- png_size_t current_buffer_size; /* amount of data now in current_buffer */
- int process_mode; /* what push library is currently doing */
- int cur_palette; /* current push library palette index */
-
-# ifdef PNG_TEXT_SUPPORTED
- png_size_t current_text_size; /* current size of text input data */
- png_size_t current_text_left; /* how much text left to read in input */
- png_charp current_text; /* current text chunk buffer */
- png_charp current_text_ptr; /* current location in current_text */
-# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */
-
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
-
-#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
-/* For the Borland special 64K segment handler */
- png_bytepp offset_table_ptr;
- png_bytep offset_table;
- png_uint_16 offset_table_number;
- png_uint_16 offset_table_count;
- png_uint_16 offset_table_count_free;
-#endif
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
- png_bytep palette_lookup; /* lookup table for quantizing */
- png_bytep quantize_index; /* index translation for palette files */
-#endif
-
-#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED)
- png_uint_16p hist; /* histogram */
-#endif
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- png_byte heuristic_method; /* heuristic for row filter selection */
- png_byte num_prev_filters; /* number of weights for previous rows */
- png_bytep prev_filters; /* filter type(s) of previous row(s) */
- png_uint_16p filter_weights; /* weight(s) for previous line(s) */
- png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
- png_uint_16p filter_costs; /* relative filter calculation cost */
- png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
-#endif
-
-#ifdef PNG_TIME_RFC1123_SUPPORTED
- png_charp time_buffer; /* String to hold RFC 1123 time text */
-#endif
-
-/* New members added in libpng-1.0.6 */
-
- png_uint_32 free_me; /* flags items libpng is responsible for freeing */
-
-#ifdef PNG_USER_CHUNKS_SUPPORTED
- png_voidp user_chunk_ptr;
- png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
-#endif
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- int num_chunk_list;
- png_bytep chunk_list;
-#endif
-
-/* New members added in libpng-1.0.3 */
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
- png_byte rgb_to_gray_status;
- /* These were changed from png_byte in libpng-1.0.6 */
- png_uint_16 rgb_to_gray_red_coeff;
- png_uint_16 rgb_to_gray_green_coeff;
- png_uint_16 rgb_to_gray_blue_coeff;
-#endif
-
-/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
-#if defined(PNG_MNG_FEATURES_SUPPORTED) || \
- defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
- defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
-/* Changed from png_byte to png_uint_32 at version 1.2.0 */
- png_uint_32 mng_features_permitted;
-#endif
-
-/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- png_byte filter_type;
-#endif
-
-/* New members added in libpng-1.2.0 */
-
-/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
-#ifdef PNG_USER_MEM_SUPPORTED
- png_voidp mem_ptr; /* user supplied struct for mem functions */
- png_malloc_ptr malloc_fn; /* function for allocating memory */
- png_free_ptr free_fn; /* function for freeing memory */
-#endif
-
-/* New member added in libpng-1.0.13 and 1.2.0 */
- png_bytep big_row_buf; /* buffer to save current (unfiltered) row */
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
-/* The following three members were added at version 1.0.14 and 1.2.4 */
- png_bytep quantize_sort; /* working sort array */
- png_bytep index_to_palette; /* where the original index currently is
- in the palette */
- png_bytep palette_to_index; /* which original index points to this
- palette color */
-#endif
-
-/* New members added in libpng-1.0.16 and 1.2.6 */
- png_byte compression_type;
-
-#ifdef PNG_USER_LIMITS_SUPPORTED
- png_uint_32 user_width_max;
- png_uint_32 user_height_max;
-
- /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown
- * chunks that can be stored (0 means unlimited).
- */
- png_uint_32 user_chunk_cache_max;
-
- /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk
- * can occupy when decompressed. 0 means unlimited.
- */
- png_alloc_size_t user_chunk_malloc_max;
-#endif
-
-/* New member added in libpng-1.0.25 and 1.2.17 */
-#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
- /* Storage for unknown chunk that the library doesn't recognize. */
- png_unknown_chunk unknown_chunk;
-#endif
-
-/* New members added in libpng-1.2.26 */
- png_size_t old_big_row_buf_size;
- png_size_t old_prev_row_size;
-
-/* New member added in libpng-1.2.30 */
- png_charp chunkdata; /* buffer for reading chunk data */
-
-#ifdef PNG_IO_STATE_SUPPORTED
-/* New member added in libpng-1.4.0 */
- png_uint_32 io_state;
-#endif
-};
-#endif /* PNGSTRUCT_H */
+++ /dev/null
-
-/* pngtrans.c - transforms the data in a row (used by both readers and writers)
- *
- * Last changed in libpng 1.5.2 [March 31, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-#include "pngpriv.h"
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-
-#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-/* Turn on BGR-to-RGB mapping */
-void PNGAPI
-png_set_bgr(png_structp png_ptr)
-{
- png_debug(1, "in png_set_bgr");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_BGR;
-}
-#endif
-
-#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-/* Turn on 16 bit byte swapping */
-void PNGAPI
-png_set_swap(png_structp png_ptr)
-{
- png_debug(1, "in png_set_swap");
-
- if (png_ptr == NULL)
- return;
-
- if (png_ptr->bit_depth == 16)
- png_ptr->transformations |= PNG_SWAP_BYTES;
-}
-#endif
-
-#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
-/* Turn on pixel packing */
-void PNGAPI
-png_set_packing(png_structp png_ptr)
-{
- png_debug(1, "in png_set_packing");
-
- if (png_ptr == NULL)
- return;
-
- if (png_ptr->bit_depth < 8)
- {
- png_ptr->transformations |= PNG_PACK;
- png_ptr->usr_bit_depth = 8;
- }
-}
-#endif
-
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-/* Turn on packed pixel swapping */
-void PNGAPI
-png_set_packswap(png_structp png_ptr)
-{
- png_debug(1, "in png_set_packswap");
-
- if (png_ptr == NULL)
- return;
-
- if (png_ptr->bit_depth < 8)
- png_ptr->transformations |= PNG_PACKSWAP;
-}
-#endif
-
-#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
-void PNGAPI
-png_set_shift(png_structp png_ptr, png_const_color_8p true_bits)
-{
- png_debug(1, "in png_set_shift");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_SHIFT;
- png_ptr->shift = *true_bits;
-}
-#endif
-
-#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
- defined(PNG_WRITE_INTERLACING_SUPPORTED)
-int PNGAPI
-png_set_interlace_handling(png_structp png_ptr)
-{
- png_debug(1, "in png_set_interlace handling");
-
- if (png_ptr && png_ptr->interlaced)
- {
- png_ptr->transformations |= PNG_INTERLACE;
- return (7);
- }
-
- return (1);
-}
-#endif
-
-#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
-/* Add a filler byte on read, or remove a filler or alpha byte on write.
- * The filler type has changed in v0.95 to allow future 2-byte fillers
- * for 48-bit input data, as well as to avoid problems with some compilers
- * that don't like bytes as parameters.
- */
-void PNGAPI
-png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
-{
- png_debug(1, "in png_set_filler");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_FILLER;
- png_ptr->filler = (png_uint_16)filler;
-
- if (filler_loc == PNG_FILLER_AFTER)
- png_ptr->flags |= PNG_FLAG_FILLER_AFTER;
-
- else
- png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER;
-
- /* This should probably go in the "do_read_filler" routine.
- * I attempted to do that in libpng-1.0.1a but that caused problems
- * so I restored it in libpng-1.0.2a
- */
-
- if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
- {
- png_ptr->usr_channels = 4;
- }
-
- /* Also I added this in libpng-1.0.2a (what happens when we expand
- * a less-than-8-bit grayscale to GA?) */
-
- if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8)
- {
- png_ptr->usr_channels = 2;
- }
-}
-
-/* Added to libpng-1.2.7 */
-void PNGAPI
-png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
-{
- png_debug(1, "in png_set_add_alpha");
-
- if (png_ptr == NULL)
- return;
-
- png_set_filler(png_ptr, filler, filler_loc);
- png_ptr->transformations |= PNG_ADD_ALPHA;
-}
-
-#endif
-
-#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
- defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
-void PNGAPI
-png_set_swap_alpha(png_structp png_ptr)
-{
- png_debug(1, "in png_set_swap_alpha");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_SWAP_ALPHA;
-}
-#endif
-
-#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
- defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
-void PNGAPI
-png_set_invert_alpha(png_structp png_ptr)
-{
- png_debug(1, "in png_set_invert_alpha");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_INVERT_ALPHA;
-}
-#endif
-
-#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
-void PNGAPI
-png_set_invert_mono(png_structp png_ptr)
-{
- png_debug(1, "in png_set_invert_mono");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_INVERT_MONO;
-}
-
-/* Invert monochrome grayscale data */
-void /* PRIVATE */
-png_do_invert(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_invert");
-
- /* This test removed from libpng version 1.0.13 and 1.2.0:
- * if (row_info->bit_depth == 1 &&
- */
- if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
- {
- png_bytep rp = row;
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
-
- for (i = 0; i < istop; i++)
- {
- *rp = (png_byte)(~(*rp));
- rp++;
- }
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
- row_info->bit_depth == 8)
- {
- png_bytep rp = row;
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
-
- for (i = 0; i < istop; i += 2)
- {
- *rp = (png_byte)(~(*rp));
- rp += 2;
- }
- }
-
-#ifdef PNG_16BIT_SUPPORTED
- else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
- row_info->bit_depth == 16)
- {
- png_bytep rp = row;
- png_size_t i;
- png_size_t istop = row_info->rowbytes;
-
- for (i = 0; i < istop; i += 4)
- {
- *rp = (png_byte)(~(*rp));
- *(rp + 1) = (png_byte)(~(*(rp + 1)));
- rp += 4;
- }
- }
-#endif
-}
-#endif
-
-#ifdef PNG_16BIT_SUPPORTED
-#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-/* Swaps byte order on 16 bit depth images */
-void /* PRIVATE */
-png_do_swap(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_swap");
-
- if (row_info->bit_depth == 16)
- {
- png_bytep rp = row;
- png_uint_32 i;
- png_uint_32 istop= row_info->width * row_info->channels;
-
- for (i = 0; i < istop; i++, rp += 2)
- {
- png_byte t = *rp;
- *rp = *(rp + 1);
- *(rp + 1) = t;
- }
- }
-}
-#endif
-#endif
-
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-static PNG_CONST png_byte onebppswaptable[256] = {
- 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
- 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
- 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
- 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
- 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
- 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
- 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
- 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
- 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
- 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
- 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
- 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
- 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
- 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
- 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
- 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
- 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
- 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
- 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
- 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
- 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
- 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
- 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
- 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
- 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
- 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
- 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
- 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
- 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
- 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
- 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
- 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
-};
-
-static PNG_CONST png_byte twobppswaptable[256] = {
- 0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,
- 0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,
- 0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,
- 0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4,
- 0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8,
- 0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8,
- 0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC,
- 0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC,
- 0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1,
- 0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1,
- 0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5,
- 0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5,
- 0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9,
- 0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9,
- 0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD,
- 0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD,
- 0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2,
- 0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2,
- 0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6,
- 0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6,
- 0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA,
- 0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA,
- 0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE,
- 0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE,
- 0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3,
- 0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3,
- 0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7,
- 0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7,
- 0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB,
- 0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB,
- 0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF,
- 0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
-};
-
-static PNG_CONST png_byte fourbppswaptable[256] = {
- 0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
- 0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,
- 0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,
- 0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1,
- 0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,
- 0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2,
- 0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73,
- 0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3,
- 0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74,
- 0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4,
- 0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75,
- 0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5,
- 0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76,
- 0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6,
- 0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77,
- 0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7,
- 0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78,
- 0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8,
- 0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79,
- 0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9,
- 0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A,
- 0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA,
- 0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B,
- 0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB,
- 0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C,
- 0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC,
- 0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D,
- 0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD,
- 0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E,
- 0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE,
- 0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F,
- 0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF
-};
-
-/* Swaps pixel packing order within bytes */
-void /* PRIVATE */
-png_do_packswap(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_packswap");
-
- if (row_info->bit_depth < 8)
- {
- png_bytep rp;
- png_const_bytep end, table;
-
- end = row + row_info->rowbytes;
-
- if (row_info->bit_depth == 1)
- table = onebppswaptable;
-
- else if (row_info->bit_depth == 2)
- table = twobppswaptable;
-
- else if (row_info->bit_depth == 4)
- table = fourbppswaptable;
-
- else
- return;
-
- for (rp = row; rp < end; rp++)
- *rp = table[*rp];
- }
-}
-#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */
-
-#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
- defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
-/* Remove a channel - this used to be 'png_do_strip_filler' but it used a
- * somewhat weird combination of flags to determine what to do. All the calls
- * to png_do_strip_filler are changed in 1.5.2 to call this instead with the
- * correct arguments.
- *
- * The routine isn't general - the channel must be the channel at the start or
- * end (not in the middle) of each pixel.
- */
-void /* PRIVATE */
-png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
-{
- png_bytep sp = row; /* source pointer */
- png_bytep dp = row; /* destination pointer */
- png_bytep ep = row + row_info->rowbytes; /* One beyond end of row */
-
- /* At the start sp will point to the first byte to copy and dp to where
- * it is copied to. ep always points just beyond the end of the row, so
- * the loop simply copies (channels-1) channels until sp reaches ep.
- */
- /* GA, GX, XG cases */
- if (row_info->channels == 2)
- {
- if (row_info->bit_depth == 8)
- {
- if (at_start) /* Skip initial filler */
- ++sp;
- else /* Skip initial channels and, for sp, the filler */
- sp += 2, ++dp;
-
- /* For a 1 pixel wide image there is nothing to do */
- while (sp < ep)
- *dp++ = *sp, sp += 2;
-
- row_info->pixel_depth = 8;
- }
-
- else if (row_info->bit_depth == 16)
- {
- if (at_start)
- sp += 2;
- else
- sp += 4, dp += 2;
-
- while (sp < ep)
- *dp++ = *sp++, *dp++ = *sp, sp += 3;
-
- row_info->pixel_depth = 16;
- }
-
- else
- return; /* bad bit depth */
-
- row_info->channels = 1;
-
- /* Finally fix the color type if it records an alpha channel */
- if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- row_info->color_type = PNG_COLOR_TYPE_GRAY;
- }
-
- /* RGBA, RGBX, XRGB cases */
- else if (row_info->channels == 4)
- {
- if (row_info->bit_depth == 8)
- {
- if (at_start) /* Skip initial filler */
- ++sp;
- else /* Skip initial channels and, for sp, the filler */
- sp += 4, dp += 3;
-
- /* Note that the loop adds 3 to dp and 4 to sp each time. */
- while (sp < ep)
- *dp++ = *sp++, *dp++ = *sp++, *dp++ = *sp, sp += 2;
-
- row_info->pixel_depth = 24;
- }
-
- else if (row_info->bit_depth == 16)
- {
- if (at_start)
- sp += 2;
- else
- sp += 8, dp += 6;
-
- while (sp < ep)
- {
- /* Copy 6 bytes, skip 2 */
- *dp++ = *sp++, *dp++ = *sp++;
- *dp++ = *sp++, *dp++ = *sp++;
- *dp++ = *sp++, *dp++ = *sp, sp += 3;
- }
-
- row_info->pixel_depth = 48;
- }
-
- else
- return; /* bad bit depth */
-
- row_info->channels = 3;
-
- /* Finally fix the color type if it records an alpha channel */
- if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- row_info->color_type = PNG_COLOR_TYPE_RGB;
- }
-
- else
- return; /* The filler channel has gone already */
-
- /* Fix the rowbytes value. */
- row_info->rowbytes = dp-row;
-}
-#endif
-
-#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-/* Swaps red and blue bytes within a pixel */
-void /* PRIVATE */
-png_do_bgr(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_bgr");
-
- if ((row_info->color_type & PNG_COLOR_MASK_COLOR))
- {
- png_uint_32 row_width = row_info->width;
- if (row_info->bit_depth == 8)
- {
- if (row_info->color_type == PNG_COLOR_TYPE_RGB)
- {
- png_bytep rp;
- png_uint_32 i;
-
- for (i = 0, rp = row; i < row_width; i++, rp += 3)
- {
- png_byte save = *rp;
- *rp = *(rp + 2);
- *(rp + 2) = save;
- }
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- {
- png_bytep rp;
- png_uint_32 i;
-
- for (i = 0, rp = row; i < row_width; i++, rp += 4)
- {
- png_byte save = *rp;
- *rp = *(rp + 2);
- *(rp + 2) = save;
- }
- }
- }
-
-#ifdef PNG_16BIT_SUPPORTED
- else if (row_info->bit_depth == 16)
- {
- if (row_info->color_type == PNG_COLOR_TYPE_RGB)
- {
- png_bytep rp;
- png_uint_32 i;
-
- for (i = 0, rp = row; i < row_width; i++, rp += 6)
- {
- png_byte save = *rp;
- *rp = *(rp + 4);
- *(rp + 4) = save;
- save = *(rp + 1);
- *(rp + 1) = *(rp + 5);
- *(rp + 5) = save;
- }
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- {
- png_bytep rp;
- png_uint_32 i;
-
- for (i = 0, rp = row; i < row_width; i++, rp += 8)
- {
- png_byte save = *rp;
- *rp = *(rp + 4);
- *(rp + 4) = save;
- save = *(rp + 1);
- *(rp + 1) = *(rp + 5);
- *(rp + 5) = save;
- }
- }
- }
-#endif
- }
-}
-#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
-
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
-void PNGAPI
-png_set_user_transform_info(png_structp png_ptr, png_voidp
- user_transform_ptr, int user_transform_depth, int user_transform_channels)
-{
- png_debug(1, "in png_set_user_transform_info");
-
- if (png_ptr == NULL)
- return;
- png_ptr->user_transform_ptr = user_transform_ptr;
- png_ptr->user_transform_depth = (png_byte)user_transform_depth;
- png_ptr->user_transform_channels = (png_byte)user_transform_channels;
-}
-#endif
-
-/* This function returns a pointer to the user_transform_ptr associated with
- * the user transform functions. The application should free any memory
- * associated with this pointer before png_write_destroy and png_read_destroy
- * are called.
- */
-#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
-png_voidp PNGAPI
-png_get_user_transform_ptr(png_const_structp png_ptr)
-{
- if (png_ptr == NULL)
- return (NULL);
-
- return ((png_voidp)png_ptr->user_transform_ptr);
-}
-#endif
-
-#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
-png_uint_32 PNGAPI
-png_get_current_row_number(png_const_structp png_ptr)
-{
- /* See the comments in png.h - this is the sub-image row when reading and
- * interlaced image.
- */
- if (png_ptr != NULL)
- return png_ptr->row_number;
-
- return PNG_UINT_32_MAX; /* help the app not to fail silently */
-}
-
-png_byte PNGAPI
-png_get_current_pass_number(png_const_structp png_ptr)
-{
- if (png_ptr != NULL)
- return png_ptr->pass;
- return 8; /* invalid */
-}
-#endif /* PNG_USER_TRANSFORM_INFO_SUPPORTED */
-#endif /* PNG_READ_USER_TRANSFORM_SUPPORTED ||
- PNG_WRITE_USER_TRANSFORM_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+++ /dev/null
-
-/* pngwio.c - functions for data output
- *
- * Last changed in libpng 1.5.0 [January 6, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * This file provides a location for all output. Users who need
- * special handling are expected to write functions that have the same
- * arguments as these and perform similar functions, but that possibly
- * use different output methods. Note that you shouldn't change these
- * functions, but rather write replacement functions and then change
- * them at run time with png_set_write_fn(...).
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_WRITE_SUPPORTED
-
-/* Write the data to whatever output you are using. The default routine
- * writes to a file pointer. Note that this routine sometimes gets called
- * with very small lengths, so you should implement some kind of simple
- * buffering if you are using unbuffered writes. This should never be asked
- * to write more than 64K on a 16 bit machine.
- */
-
-void /* PRIVATE */
-png_write_data(png_structp png_ptr, png_const_bytep data, png_size_t length)
-{
- /* NOTE: write_data_fn must not change the buffer! */
- if (png_ptr->write_data_fn != NULL )
- (*(png_ptr->write_data_fn))(png_ptr, (png_bytep)data, length);
-
- else
- png_error(png_ptr, "Call to NULL write function");
-}
-
-#ifdef PNG_STDIO_SUPPORTED
-/* This is the function that does the actual writing of data. If you are
- * not writing to a standard C stream, you should create a replacement
- * write_data function and use it at run time with png_set_write_fn(), rather
- * than changing the library.
- */
-#ifndef USE_FAR_KEYWORD
-void PNGCBAPI
-png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
-{
- png_size_t check;
-
- if (png_ptr == NULL)
- return;
-
- check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
-
- if (check != length)
- png_error(png_ptr, "Write Error");
-}
-#else
-/* This is the model-independent version. Since the standard I/O library
- * can't handle far buffers in the medium and small models, we have to copy
- * the data.
- */
-
-#define NEAR_BUF_SIZE 1024
-#define MIN(a,b) (a <= b ? a : b)
-
-void PNGCBAPI
-png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
-{
- png_uint_32 check;
- png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
- png_FILE_p io_ptr;
-
- if (png_ptr == NULL)
- return;
-
- /* Check if data really is near. If so, use usual code. */
- near_data = (png_byte *)CVT_PTR_NOCHECK(data);
- io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
-
- if ((png_bytep)near_data == data)
- {
- check = fwrite(near_data, 1, length, io_ptr);
- }
-
- else
- {
- png_byte buf[NEAR_BUF_SIZE];
- png_size_t written, remaining, err;
- check = 0;
- remaining = length;
-
- do
- {
- written = MIN(NEAR_BUF_SIZE, remaining);
- png_memcpy(buf, data, written); /* Copy far buffer to near buffer */
- err = fwrite(buf, 1, written, io_ptr);
-
- if (err != written)
- break;
-
- else
- check += err;
-
- data += written;
- remaining -= written;
- }
- while (remaining != 0);
- }
-
- if (check != length)
- png_error(png_ptr, "Write Error");
-}
-
-#endif
-#endif
-
-/* This function is called to output any data pending writing (normally
- * to disk). After png_flush is called, there should be no data pending
- * writing in any buffers.
- */
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
-void /* PRIVATE */
-png_flush(png_structp png_ptr)
-{
- if (png_ptr->output_flush_fn != NULL)
- (*(png_ptr->output_flush_fn))(png_ptr);
-}
-
-# ifdef PNG_STDIO_SUPPORTED
-void PNGCBAPI
-png_default_flush(png_structp png_ptr)
-{
- png_FILE_p io_ptr;
-
- if (png_ptr == NULL)
- return;
-
- io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
- fflush(io_ptr);
-}
-# endif
-#endif
-
-/* This function allows the application to supply new output functions for
- * libpng if standard C streams aren't being used.
- *
- * This function takes as its arguments:
- * png_ptr - pointer to a png output data structure
- * io_ptr - pointer to user supplied structure containing info about
- * the output functions. May be NULL.
- * write_data_fn - pointer to a new output function that takes as its
- * arguments a pointer to a png_struct, a pointer to
- * data to be written, and a 32-bit unsigned int that is
- * the number of bytes to be written. The new write
- * function should call png_error(png_ptr, "Error msg")
- * to exit and output any fatal error messages. May be
- * NULL, in which case libpng's default function will
- * be used.
- * flush_data_fn - pointer to a new flush function that takes as its
- * arguments a pointer to a png_struct. After a call to
- * the flush function, there should be no data in any buffers
- * or pending transmission. If the output method doesn't do
- * any buffering of output, a function prototype must still be
- * supplied although it doesn't have to do anything. If
- * PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
- * time, output_flush_fn will be ignored, although it must be
- * supplied for compatibility. May be NULL, in which case
- * libpng's default function will be used, if
- * PNG_WRITE_FLUSH_SUPPORTED is defined. This is not
- * a good idea if io_ptr does not point to a standard
- * *FILE structure.
- */
-void PNGAPI
-png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
- png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
-{
- if (png_ptr == NULL)
- return;
-
- png_ptr->io_ptr = io_ptr;
-
-#ifdef PNG_STDIO_SUPPORTED
- if (write_data_fn != NULL)
- png_ptr->write_data_fn = write_data_fn;
-
- else
- png_ptr->write_data_fn = png_default_write_data;
-#else
- png_ptr->write_data_fn = write_data_fn;
-#endif
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
-# ifdef PNG_STDIO_SUPPORTED
-
- if (output_flush_fn != NULL)
- png_ptr->output_flush_fn = output_flush_fn;
-
- else
- png_ptr->output_flush_fn = png_default_flush;
-
-# else
- png_ptr->output_flush_fn = output_flush_fn;
-# endif
-#endif /* PNG_WRITE_FLUSH_SUPPORTED */
-
- /* It is an error to read while writing a png file */
- if (png_ptr->read_data_fn != NULL)
- {
- png_ptr->read_data_fn = NULL;
-
- png_warning(png_ptr,
- "Can't set both read_data_fn and write_data_fn in the"
- " same structure");
- }
-}
-
-#ifdef USE_FAR_KEYWORD
-# ifdef _MSC_VER
-void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
-{
- void *near_ptr;
- void FAR *far_ptr;
- FP_OFF(near_ptr) = FP_OFF(ptr);
- far_ptr = (void FAR *)near_ptr;
-
- if (check != 0)
- if (FP_SEG(ptr) != FP_SEG(far_ptr))
- png_error(png_ptr, "segment lost in conversion");
-
- return(near_ptr);
-}
-# else
-void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
-{
- void *near_ptr;
- void FAR *far_ptr;
- near_ptr = (void FAR *)ptr;
- far_ptr = (void FAR *)near_ptr;
-
- if (check != 0)
- if (far_ptr != ptr)
- png_error(png_ptr, "segment lost in conversion");
-
- return(near_ptr);
-}
-# endif
-#endif
-#endif /* PNG_WRITE_SUPPORTED */
+++ /dev/null
-
-/* pngwrite.c - general routines to write a PNG file
- *
- * Last changed in libpng 1.5.1 [February 3, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_WRITE_SUPPORTED
-
-/* Writes all the PNG information. This is the suggested way to use the
- * library. If you have a new chunk to add, make a function to write it,
- * and put it in the correct location here. If you want the chunk written
- * after the image data, put it in png_write_end(). I strongly encourage
- * you to supply a PNG_INFO_ flag, and check info_ptr->valid before writing
- * the chunk, as that will keep the code from breaking if you want to just
- * write a plain PNG file. If you have long comments, I suggest writing
- * them in png_write_end(), and compressing them.
- */
-void PNGAPI
-png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
-{
- png_debug(1, "in png_write_info_before_PLTE");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
- {
- /* Write PNG signature */
- png_write_sig(png_ptr);
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \
- (png_ptr->mng_features_permitted))
- {
- png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
- png_ptr->mng_features_permitted = 0;
- }
-#endif
-
- /* Write IHDR information. */
- png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
- info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
- info_ptr->filter_type,
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- info_ptr->interlace_type);
-#else
- 0);
-#endif
- /* The rest of these check to see if the valid field has the appropriate
- * flag set, and if it does, writes the chunk.
- */
-#ifdef PNG_WRITE_gAMA_SUPPORTED
- if (info_ptr->valid & PNG_INFO_gAMA)
- png_write_gAMA_fixed(png_ptr, info_ptr->gamma);
-#endif
-#ifdef PNG_WRITE_sRGB_SUPPORTED
- if (info_ptr->valid & PNG_INFO_sRGB)
- png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
-#endif
-
-#ifdef PNG_WRITE_iCCP_SUPPORTED
- if (info_ptr->valid & PNG_INFO_iCCP)
- png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
- (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
-#endif
-#ifdef PNG_WRITE_sBIT_SUPPORTED
- if (info_ptr->valid & PNG_INFO_sBIT)
- png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
-#endif
-#ifdef PNG_WRITE_cHRM_SUPPORTED
- if (info_ptr->valid & PNG_INFO_cHRM)
- png_write_cHRM_fixed(png_ptr,
- info_ptr->x_white, info_ptr->y_white,
- info_ptr->x_red, info_ptr->y_red,
- info_ptr->x_green, info_ptr->y_green,
- info_ptr->x_blue, info_ptr->y_blue);
-#endif
-
-#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
- if (info_ptr->unknown_chunks_num)
- {
- png_unknown_chunk *up;
-
- png_debug(5, "writing extra chunks");
-
- for (up = info_ptr->unknown_chunks;
- up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
- up++)
- {
- int keep = png_handle_as_unknown(png_ptr, up->name);
-
- if (keep != PNG_HANDLE_CHUNK_NEVER &&
- up->location && !(up->location & PNG_HAVE_PLTE) &&
- !(up->location & PNG_HAVE_IDAT) &&
- ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
- (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
- {
- if (up->size == 0)
- png_warning(png_ptr, "Writing zero-length unknown chunk");
-
- png_write_chunk(png_ptr, up->name, up->data, up->size);
- }
- }
- }
-#endif
- png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE;
- }
-}
-
-void PNGAPI
-png_write_info(png_structp png_ptr, png_infop info_ptr)
-{
-#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
- int i;
-#endif
-
- png_debug(1, "in png_write_info");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- png_write_info_before_PLTE(png_ptr, info_ptr);
-
- if (info_ptr->valid & PNG_INFO_PLTE)
- png_write_PLTE(png_ptr, info_ptr->palette,
- (png_uint_32)info_ptr->num_palette);
-
- else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- png_error(png_ptr, "Valid palette required for paletted images");
-
-#ifdef PNG_WRITE_tRNS_SUPPORTED
- if (info_ptr->valid & PNG_INFO_tRNS)
- {
-#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
- /* Invert the alpha channel (in tRNS) */
- if ((png_ptr->transformations & PNG_INVERT_ALPHA) &&
- info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- int j;
- for (j = 0; j<(int)info_ptr->num_trans; j++)
- info_ptr->trans_alpha[j] =
- (png_byte)(255 - info_ptr->trans_alpha[j]);
- }
-#endif
- png_write_tRNS(png_ptr, info_ptr->trans_alpha, &(info_ptr->trans_color),
- info_ptr->num_trans, info_ptr->color_type);
- }
-#endif
-#ifdef PNG_WRITE_bKGD_SUPPORTED
- if (info_ptr->valid & PNG_INFO_bKGD)
- png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type);
-#endif
-
-#ifdef PNG_WRITE_hIST_SUPPORTED
- if (info_ptr->valid & PNG_INFO_hIST)
- png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette);
-#endif
-
-#ifdef PNG_WRITE_oFFs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_oFFs)
- png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset,
- info_ptr->offset_unit_type);
-#endif
-
-#ifdef PNG_WRITE_pCAL_SUPPORTED
- if (info_ptr->valid & PNG_INFO_pCAL)
- png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0,
- info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
- info_ptr->pcal_units, info_ptr->pcal_params);
-#endif
-
-#ifdef PNG_WRITE_sCAL_SUPPORTED
- if (info_ptr->valid & PNG_INFO_sCAL)
- png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit,
- info_ptr->scal_s_width, info_ptr->scal_s_height);
-#endif /* sCAL */
-
-#ifdef PNG_WRITE_pHYs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_pHYs)
- png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit,
- info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type);
-#endif /* pHYs */
-
-#ifdef PNG_WRITE_tIME_SUPPORTED
- if (info_ptr->valid & PNG_INFO_tIME)
- {
- png_write_tIME(png_ptr, &(info_ptr->mod_time));
- png_ptr->mode |= PNG_WROTE_tIME;
- }
-#endif /* tIME */
-
-#ifdef PNG_WRITE_sPLT_SUPPORTED
- if (info_ptr->valid & PNG_INFO_sPLT)
- for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
- png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
-#endif /* sPLT */
-
-#ifdef PNG_WRITE_TEXT_SUPPORTED
- /* Check to see if we need to write text chunks */
- for (i = 0; i < info_ptr->num_text; i++)
- {
- png_debug2(2, "Writing header text chunk %d, type %d", i,
- info_ptr->text[i].compression);
- /* An internationalized chunk? */
- if (info_ptr->text[i].compression > 0)
- {
-#ifdef PNG_WRITE_iTXt_SUPPORTED
- /* Write international chunk */
- png_write_iTXt(png_ptr,
- info_ptr->text[i].compression,
- info_ptr->text[i].key,
- info_ptr->text[i].lang,
- info_ptr->text[i].lang_key,
- info_ptr->text[i].text);
-#else
- png_warning(png_ptr, "Unable to write international text");
-#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
- }
-
- /* If we want a compressed text chunk */
- else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt)
- {
-#ifdef PNG_WRITE_zTXt_SUPPORTED
- /* Write compressed chunk */
- png_write_zTXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text, 0,
- info_ptr->text[i].compression);
-#else
- png_warning(png_ptr, "Unable to write compressed text");
-#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
- }
-
- else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
- {
-#ifdef PNG_WRITE_tEXt_SUPPORTED
- /* Write uncompressed chunk */
- png_write_tEXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text,
- 0);
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
-#else
- /* Can't get here */
- png_warning(png_ptr, "Unable to write uncompressed text");
-#endif
- }
- }
-#endif /* tEXt */
-
-#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
- if (info_ptr->unknown_chunks_num)
- {
- png_unknown_chunk *up;
-
- png_debug(5, "writing extra chunks");
-
- for (up = info_ptr->unknown_chunks;
- up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
- up++)
- {
- int keep = png_handle_as_unknown(png_ptr, up->name);
- if (keep != PNG_HANDLE_CHUNK_NEVER &&
- up->location && (up->location & PNG_HAVE_PLTE) &&
- !(up->location & PNG_HAVE_IDAT) &&
- ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
- (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
- {
- png_write_chunk(png_ptr, up->name, up->data, up->size);
- }
- }
- }
-#endif
-}
-
-/* Writes the end of the PNG file. If you don't want to write comments or
- * time information, you can pass NULL for info. If you already wrote these
- * in png_write_info(), do not write them again here. If you have long
- * comments, I suggest writing them here, and compressing them.
- */
-void PNGAPI
-png_write_end(png_structp png_ptr, png_infop info_ptr)
-{
- png_debug(1, "in png_write_end");
-
- if (png_ptr == NULL)
- return;
-
- if (!(png_ptr->mode & PNG_HAVE_IDAT))
- png_error(png_ptr, "No IDATs written into file");
-
- /* See if user wants us to write information chunks */
- if (info_ptr != NULL)
- {
-#ifdef PNG_WRITE_TEXT_SUPPORTED
- int i; /* local index variable */
-#endif
-#ifdef PNG_WRITE_tIME_SUPPORTED
- /* Check to see if user has supplied a time chunk */
- if ((info_ptr->valid & PNG_INFO_tIME) &&
- !(png_ptr->mode & PNG_WROTE_tIME))
- png_write_tIME(png_ptr, &(info_ptr->mod_time));
-
-#endif
-#ifdef PNG_WRITE_TEXT_SUPPORTED
- /* Loop through comment chunks */
- for (i = 0; i < info_ptr->num_text; i++)
- {
- png_debug2(2, "Writing trailer text chunk %d, type %d", i,
- info_ptr->text[i].compression);
- /* An internationalized chunk? */
- if (info_ptr->text[i].compression > 0)
- {
-#ifdef PNG_WRITE_iTXt_SUPPORTED
- /* Write international chunk */
- png_write_iTXt(png_ptr,
- info_ptr->text[i].compression,
- info_ptr->text[i].key,
- info_ptr->text[i].lang,
- info_ptr->text[i].lang_key,
- info_ptr->text[i].text);
-#else
- png_warning(png_ptr, "Unable to write international text");
-#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
- }
-
- else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
- {
-#ifdef PNG_WRITE_zTXt_SUPPORTED
- /* Write compressed chunk */
- png_write_zTXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text, 0,
- info_ptr->text[i].compression);
-#else
- png_warning(png_ptr, "Unable to write compressed text");
-#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
- }
-
- else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
- {
-#ifdef PNG_WRITE_tEXt_SUPPORTED
- /* Write uncompressed chunk */
- png_write_tEXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text, 0);
-#else
- png_warning(png_ptr, "Unable to write uncompressed text");
-#endif
-
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
- }
- }
-#endif
-#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
- if (info_ptr->unknown_chunks_num)
- {
- png_unknown_chunk *up;
-
- png_debug(5, "writing extra chunks");
-
- for (up = info_ptr->unknown_chunks;
- up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
- up++)
- {
- int keep = png_handle_as_unknown(png_ptr, up->name);
- if (keep != PNG_HANDLE_CHUNK_NEVER &&
- up->location && (up->location & PNG_AFTER_IDAT) &&
- ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
- (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
- {
- png_write_chunk(png_ptr, up->name, up->data, up->size);
- }
- }
- }
-#endif
- }
-
- png_ptr->mode |= PNG_AFTER_IDAT;
-
- /* Write end of PNG file */
- png_write_IEND(png_ptr);
- /* This flush, added in libpng-1.0.8, removed from libpng-1.0.9beta03,
- * and restored again in libpng-1.2.30, may cause some applications that
- * do not set png_ptr->output_flush_fn to crash. If your application
- * experiences a problem, please try building libpng with
- * PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED defined, and report the event to
- * png-mng-implement at lists.sf.net .
- */
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
-# ifdef PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED
- png_flush(png_ptr);
-# endif
-#endif
-}
-
-#ifdef PNG_CONVERT_tIME_SUPPORTED
-/* "tm" structure is not supported on WindowsCE */
-void PNGAPI
-png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime)
-{
- png_debug(1, "in png_convert_from_struct_tm");
-
- ptime->year = (png_uint_16)(1900 + ttime->tm_year);
- ptime->month = (png_byte)(ttime->tm_mon + 1);
- ptime->day = (png_byte)ttime->tm_mday;
- ptime->hour = (png_byte)ttime->tm_hour;
- ptime->minute = (png_byte)ttime->tm_min;
- ptime->second = (png_byte)ttime->tm_sec;
-}
-
-void PNGAPI
-png_convert_from_time_t(png_timep ptime, time_t ttime)
-{
- struct tm *tbuf;
-
- png_debug(1, "in png_convert_from_time_t");
-
- tbuf = gmtime(&ttime);
- png_convert_from_struct_tm(ptime, tbuf);
-}
-#endif
-
-/* Initialize png_ptr structure, and allocate any memory needed */
-PNG_FUNCTION(png_structp,PNGAPI
-png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED)
-{
-#ifdef PNG_USER_MEM_SUPPORTED
- return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn,
- warn_fn, NULL, NULL, NULL));
-}
-
-/* Alternate initialize png_ptr structure, and allocate any memory needed */
-static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */
-
-PNG_FUNCTION(png_structp,PNGAPI
-png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
- png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED)
-{
-#endif /* PNG_USER_MEM_SUPPORTED */
- volatile int png_cleanup_needed = 0;
-#ifdef PNG_SETJMP_SUPPORTED
- volatile
-#endif
- png_structp png_ptr;
-#ifdef PNG_SETJMP_SUPPORTED
-#ifdef USE_FAR_KEYWORD
- jmp_buf png_jmpbuf;
-#endif
-#endif
- int i;
-
- png_debug(1, "in png_create_write_struct");
-
-#ifdef PNG_USER_MEM_SUPPORTED
- png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
- (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
-#else
- png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
-#endif /* PNG_USER_MEM_SUPPORTED */
- if (png_ptr == NULL)
- return (NULL);
-
- /* Added at libpng-1.2.6 */
-#ifdef PNG_SET_USER_LIMITS_SUPPORTED
- png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
- png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
-/* Applications that neglect to set up their own setjmp() and then
- encounter a png_error() will longjmp here. Since the jmpbuf is
- then meaningless we abort instead of returning. */
-#ifdef USE_FAR_KEYWORD
- if (setjmp(png_jmpbuf))
-#else
- if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */
-#endif
-#ifdef USE_FAR_KEYWORD
- png_memcpy(png_jmpbuf(png_ptr), png_jmpbuf, png_sizeof(jmp_buf));
-#endif
- PNG_ABORT();
-#endif
-
-#ifdef PNG_USER_MEM_SUPPORTED
- png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
-#endif /* PNG_USER_MEM_SUPPORTED */
- png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
-
- if (user_png_ver)
- {
- i = 0;
- do
- {
- if (user_png_ver[i] != png_libpng_ver[i])
- png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
- } while (png_libpng_ver[i++]);
- }
-
- if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
- {
- /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
- * we must recompile any applications that use any older library version.
- * For versions after libpng 1.0, we will be compatible, so we need
- * only check the first digit.
- */
- if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
- (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
- (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
- {
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- char msg[80];
-
- if (user_png_ver)
- {
- png_snprintf2(msg, 80,
- "Application built with libpng-%.20s"
- " but running with %.20s",
- user_png_ver,
- png_libpng_ver);
- png_warning(png_ptr, msg);
- }
-#else
- png_warning(png_ptr,
- "Incompatible libpng version in application and library");
-#endif
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- png_ptr->flags = 0;
-#endif
- png_cleanup_needed = 1;
- }
- }
-
- /* Initialize zbuf - compression buffer */
- png_ptr->zbuf_size = PNG_ZBUF_SIZE;
-
- if (!png_cleanup_needed)
- {
- png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr,
- png_ptr->zbuf_size);
- if (png_ptr->zbuf == NULL)
- png_cleanup_needed = 1;
- }
-
- if (png_cleanup_needed)
- {
- /* Clean up PNG structure and deallocate any memory. */
- png_free(png_ptr, png_ptr->zbuf);
- png_ptr->zbuf = NULL;
-#ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2((png_voidp)png_ptr,
- (png_free_ptr)free_fn, (png_voidp)mem_ptr);
-#else
- png_destroy_struct((png_voidp)png_ptr);
-#endif
- return (NULL);
- }
-
- png_set_write_fn(png_ptr, NULL, NULL, NULL);
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- png_reset_filter_heuristics(png_ptr);
-#endif
-
- return (png_ptr);
-}
-
-
-/* Write a few rows of image data. If the image is interlaced,
- * either you will have to write the 7 sub images, or, if you
- * have called png_set_interlace_handling(), you will have to
- * "write" the image seven times.
- */
-void PNGAPI
-png_write_rows(png_structp png_ptr, png_bytepp row,
- png_uint_32 num_rows)
-{
- png_uint_32 i; /* row counter */
- png_bytepp rp; /* row pointer */
-
- png_debug(1, "in png_write_rows");
-
- if (png_ptr == NULL)
- return;
-
- /* Loop through the rows */
- for (i = 0, rp = row; i < num_rows; i++, rp++)
- {
- png_write_row(png_ptr, *rp);
- }
-}
-
-/* Write the image. You only need to call this function once, even
- * if you are writing an interlaced image.
- */
-void PNGAPI
-png_write_image(png_structp png_ptr, png_bytepp image)
-{
- png_uint_32 i; /* row index */
- int pass, num_pass; /* pass variables */
- png_bytepp rp; /* points to current row */
-
- if (png_ptr == NULL)
- return;
-
- png_debug(1, "in png_write_image");
-
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* Initialize interlace handling. If image is not interlaced,
- * this will set pass to 1
- */
- num_pass = png_set_interlace_handling(png_ptr);
-#else
- num_pass = 1;
-#endif
- /* Loop through passes */
- for (pass = 0; pass < num_pass; pass++)
- {
- /* Loop through image */
- for (i = 0, rp = image; i < png_ptr->height; i++, rp++)
- {
- png_write_row(png_ptr, *rp);
- }
- }
-}
-
-/* Called by user to write a row of image data */
-void PNGAPI
-png_write_row(png_structp png_ptr, png_const_bytep row)
-{
- if (png_ptr == NULL)
- return;
-
- png_debug2(1, "in png_write_row (row %u, pass %d)",
- png_ptr->row_number, png_ptr->pass);
-
- /* Initialize transformations and other stuff if first time */
- if (png_ptr->row_number == 0 && png_ptr->pass == 0)
- {
- /* Make sure we wrote the header info */
- if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
- png_error(png_ptr,
- "png_write_info was never called before png_write_row");
-
- /* Check for transforms that have been set but were defined out */
-#if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED)
- if (png_ptr->transformations & PNG_INVERT_MONO)
- png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined");
-#endif
-
-#if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED)
- if (png_ptr->transformations & PNG_FILLER)
- png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined");
-#endif
-#if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \
- defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- png_warning(png_ptr,
- "PNG_WRITE_PACKSWAP_SUPPORTED is not defined");
-#endif
-
-#if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED)
- if (png_ptr->transformations & PNG_PACK)
- png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined");
-#endif
-
-#if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED)
- if (png_ptr->transformations & PNG_SHIFT)
- png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined");
-#endif
-
-#if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED)
- if (png_ptr->transformations & PNG_BGR)
- png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined");
-#endif
-
-#if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_SWAP_BYTES)
- png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined");
-#endif
-
- png_write_start_row(png_ptr);
- }
-
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* If interlaced and not interested in row, return */
- if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
- {
- switch (png_ptr->pass)
- {
- case 0:
- if (png_ptr->row_number & 0x07)
- {
- png_write_finish_row(png_ptr);
- return;
- }
- break;
-
- case 1:
- if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
- {
- png_write_finish_row(png_ptr);
- return;
- }
- break;
-
- case 2:
- if ((png_ptr->row_number & 0x07) != 4)
- {
- png_write_finish_row(png_ptr);
- return;
- }
- break;
-
- case 3:
- if ((png_ptr->row_number & 0x03) || png_ptr->width < 3)
- {
- png_write_finish_row(png_ptr);
- return;
- }
- break;
-
- case 4:
- if ((png_ptr->row_number & 0x03) != 2)
- {
- png_write_finish_row(png_ptr);
- return;
- }
- break;
-
- case 5:
- if ((png_ptr->row_number & 0x01) || png_ptr->width < 2)
- {
- png_write_finish_row(png_ptr);
- return;
- }
- break;
-
- case 6:
- if (!(png_ptr->row_number & 0x01))
- {
- png_write_finish_row(png_ptr);
- return;
- }
- break;
-
- default: /* error: ignore it */
- break;
- }
- }
-#endif
-
- /* Set up row info for transformations */
- png_ptr->row_info.color_type = png_ptr->color_type;
- png_ptr->row_info.width = png_ptr->usr_width;
- png_ptr->row_info.channels = png_ptr->usr_channels;
- png_ptr->row_info.bit_depth = png_ptr->usr_bit_depth;
- png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
- png_ptr->row_info.channels);
-
- png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
-
- png_debug1(3, "row_info->color_type = %d", png_ptr->row_info.color_type);
- png_debug1(3, "row_info->width = %u", png_ptr->row_info.width);
- png_debug1(3, "row_info->channels = %d", png_ptr->row_info.channels);
- png_debug1(3, "row_info->bit_depth = %d", png_ptr->row_info.bit_depth);
- png_debug1(3, "row_info->pixel_depth = %d", png_ptr->row_info.pixel_depth);
- png_debug1(3, "row_info->rowbytes = %lu",
- (unsigned long)png_ptr->row_info.rowbytes);
-
- /* Copy user's row into buffer, leaving room for filter byte. */
- png_memcpy(png_ptr->row_buf + 1, row, png_ptr->row_info.rowbytes);
-
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* Handle interlacing */
- if (png_ptr->interlaced && png_ptr->pass < 6 &&
- (png_ptr->transformations & PNG_INTERLACE))
- {
- png_do_write_interlace(&(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->pass);
- /* This should always get caught above, but still ... */
- if (!(png_ptr->row_info.width))
- {
- png_write_finish_row(png_ptr);
- return;
- }
- }
-#endif
-
- /* Handle other transformations */
- if (png_ptr->transformations)
- png_do_write_transformations(png_ptr);
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- /* Write filter_method 64 (intrapixel differencing) only if
- * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
- * 2. Libpng did not write a PNG signature (this filter_method is only
- * used in PNG datastreams that are embedded in MNG datastreams) and
- * 3. The application called png_permit_mng_features with a mask that
- * included PNG_FLAG_MNG_FILTER_64 and
- * 4. The filter_method is 64 and
- * 5. The color_type is RGB or RGBA
- */
- if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
- {
- /* Intrapixel differencing */
- png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
- }
-#endif
-
- /* Find a filter if necessary, filter the row and write it out. */
- png_write_find_filter(png_ptr, &(png_ptr->row_info));
-
- if (png_ptr->write_row_fn != NULL)
- (*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
-}
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
-/* Set the automatic flush interval or 0 to turn flushing off */
-void PNGAPI
-png_set_flush(png_structp png_ptr, int nrows)
-{
- png_debug(1, "in png_set_flush");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
-}
-
-/* Flush the current output buffers now */
-void PNGAPI
-png_write_flush(png_structp png_ptr)
-{
- int wrote_IDAT;
-
- png_debug(1, "in png_write_flush");
-
- if (png_ptr == NULL)
- return;
-
- /* We have already written out all of the data */
- if (png_ptr->row_number >= png_ptr->num_rows)
- return;
-
- do
- {
- int ret;
-
- /* Compress the data */
- ret = deflate(&png_ptr->zstream, Z_SYNC_FLUSH);
- wrote_IDAT = 0;
-
- /* Check for compression errors */
- if (ret != Z_OK)
- {
- if (png_ptr->zstream.msg != NULL)
- png_error(png_ptr, png_ptr->zstream.msg);
-
- else
- png_error(png_ptr, "zlib error");
- }
-
- if (!(png_ptr->zstream.avail_out))
- {
- /* Write the IDAT and reset the zlib output buffer */
- png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- wrote_IDAT = 1;
- }
- } while (wrote_IDAT == 1);
-
- /* If there is any data left to be output, write it into a new IDAT */
- if (png_ptr->zbuf_size != png_ptr->zstream.avail_out)
- {
- /* Write the IDAT and reset the zlib output buffer */
- png_write_IDAT(png_ptr, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- }
- png_ptr->flush_rows = 0;
- png_flush(png_ptr);
-}
-#endif /* PNG_WRITE_FLUSH_SUPPORTED */
-
-/* Free all memory used by the write */
-void PNGAPI
-png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
-{
- png_structp png_ptr = NULL;
- png_infop info_ptr = NULL;
-#ifdef PNG_USER_MEM_SUPPORTED
- png_free_ptr free_fn = NULL;
- png_voidp mem_ptr = NULL;
-#endif
-
- png_debug(1, "in png_destroy_write_struct");
-
- if (png_ptr_ptr != NULL)
- {
- png_ptr = *png_ptr_ptr;
-#ifdef PNG_USER_MEM_SUPPORTED
- free_fn = png_ptr->free_fn;
- mem_ptr = png_ptr->mem_ptr;
-#endif
- }
-
-#ifdef PNG_USER_MEM_SUPPORTED
- if (png_ptr != NULL)
- {
- free_fn = png_ptr->free_fn;
- mem_ptr = png_ptr->mem_ptr;
- }
-#endif
-
- if (info_ptr_ptr != NULL)
- info_ptr = *info_ptr_ptr;
-
- if (info_ptr != NULL)
- {
- if (png_ptr != NULL)
- {
- png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (png_ptr->num_chunk_list)
- {
- png_free(png_ptr, png_ptr->chunk_list);
- png_ptr->num_chunk_list = 0;
- }
-#endif
- }
-
-#ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
- (png_voidp)mem_ptr);
-#else
- png_destroy_struct((png_voidp)info_ptr);
-#endif
- *info_ptr_ptr = NULL;
- }
-
- if (png_ptr != NULL)
- {
- png_write_destroy(png_ptr);
-#ifdef PNG_USER_MEM_SUPPORTED
- png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
- (png_voidp)mem_ptr);
-#else
- png_destroy_struct((png_voidp)png_ptr);
-#endif
- *png_ptr_ptr = NULL;
- }
-}
-
-
-/* Free any memory used in png_ptr struct (old method) */
-void /* PRIVATE */
-png_write_destroy(png_structp png_ptr)
-{
-#ifdef PNG_SETJMP_SUPPORTED
- jmp_buf tmp_jmp; /* Save jump buffer */
-#endif
- png_error_ptr error_fn;
- png_error_ptr warning_fn;
- png_voidp error_ptr;
-#ifdef PNG_USER_MEM_SUPPORTED
- png_free_ptr free_fn;
-#endif
-
- png_debug(1, "in png_write_destroy");
-
- /* Free any memory zlib uses */
- deflateEnd(&png_ptr->zstream);
-
- /* Free our memory. png_free checks NULL for us. */
- png_free(png_ptr, png_ptr->zbuf);
- png_free(png_ptr, png_ptr->row_buf);
-#ifdef PNG_WRITE_FILTER_SUPPORTED
- png_free(png_ptr, png_ptr->prev_row);
- png_free(png_ptr, png_ptr->sub_row);
- png_free(png_ptr, png_ptr->up_row);
- png_free(png_ptr, png_ptr->avg_row);
- png_free(png_ptr, png_ptr->paeth_row);
-#endif
-
-#ifdef PNG_TIME_RFC1123_SUPPORTED
- png_free(png_ptr, png_ptr->time_buffer);
-#endif
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- /* Use this to save a little code space, it doesn't free the filter_costs */
- png_reset_filter_heuristics(png_ptr);
- png_free(png_ptr, png_ptr->filter_costs);
- png_free(png_ptr, png_ptr->inv_filter_costs);
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
- /* Reset structure */
- png_memcpy(tmp_jmp, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
-#endif
-
- error_fn = png_ptr->error_fn;
- warning_fn = png_ptr->warning_fn;
- error_ptr = png_ptr->error_ptr;
-#ifdef PNG_USER_MEM_SUPPORTED
- free_fn = png_ptr->free_fn;
-#endif
-
- png_memset(png_ptr, 0, png_sizeof(png_struct));
-
- png_ptr->error_fn = error_fn;
- png_ptr->warning_fn = warning_fn;
- png_ptr->error_ptr = error_ptr;
-#ifdef PNG_USER_MEM_SUPPORTED
- png_ptr->free_fn = free_fn;
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
- png_memcpy(png_ptr->png_jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
-#endif
-}
-
-/* Allow the application to select one or more row filters to use. */
-void PNGAPI
-png_set_filter(png_structp png_ptr, int method, int filters)
-{
- png_debug(1, "in png_set_filter");
-
- if (png_ptr == NULL)
- return;
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (method == PNG_INTRAPIXEL_DIFFERENCING))
- method = PNG_FILTER_TYPE_BASE;
-
-#endif
- if (method == PNG_FILTER_TYPE_BASE)
- {
- switch (filters & (PNG_ALL_FILTERS | 0x07))
- {
-#ifdef PNG_WRITE_FILTER_SUPPORTED
- case 5:
- case 6:
- case 7: png_warning(png_ptr, "Unknown row filter for method 0");
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
- case PNG_FILTER_VALUE_NONE:
- png_ptr->do_filter = PNG_FILTER_NONE; break;
-
-#ifdef PNG_WRITE_FILTER_SUPPORTED
- case PNG_FILTER_VALUE_SUB:
- png_ptr->do_filter = PNG_FILTER_SUB; break;
-
- case PNG_FILTER_VALUE_UP:
- png_ptr->do_filter = PNG_FILTER_UP; break;
-
- case PNG_FILTER_VALUE_AVG:
- png_ptr->do_filter = PNG_FILTER_AVG; break;
-
- case PNG_FILTER_VALUE_PAETH:
- png_ptr->do_filter = PNG_FILTER_PAETH; break;
-
- default:
- png_ptr->do_filter = (png_byte)filters; break;
-#else
- default:
- png_warning(png_ptr, "Unknown row filter for method 0");
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
- }
-
- /* If we have allocated the row_buf, this means we have already started
- * with the image and we should have allocated all of the filter buffers
- * that have been selected. If prev_row isn't already allocated, then
- * it is too late to start using the filters that need it, since we
- * will be missing the data in the previous row. If an application
- * wants to start and stop using particular filters during compression,
- * it should start out with all of the filters, and then add and
- * remove them after the start of compression.
- */
- if (png_ptr->row_buf != NULL)
- {
-#ifdef PNG_WRITE_FILTER_SUPPORTED
- if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
- {
- png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
- (png_ptr->rowbytes + 1));
- png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
- }
-
- if ((png_ptr->do_filter & PNG_FILTER_UP) && png_ptr->up_row == NULL)
- {
- if (png_ptr->prev_row == NULL)
- {
- png_warning(png_ptr, "Can't add Up filter after starting");
- png_ptr->do_filter = (png_byte)(png_ptr->do_filter &
- ~PNG_FILTER_UP);
- }
-
- else
- {
- png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
- (png_ptr->rowbytes + 1));
- png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
- }
- }
-
- if ((png_ptr->do_filter & PNG_FILTER_AVG) && png_ptr->avg_row == NULL)
- {
- if (png_ptr->prev_row == NULL)
- {
- png_warning(png_ptr, "Can't add Average filter after starting");
- png_ptr->do_filter = (png_byte)(png_ptr->do_filter &
- ~PNG_FILTER_AVG);
- }
-
- else
- {
- png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
- (png_ptr->rowbytes + 1));
- png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
- }
- }
-
- if ((png_ptr->do_filter & PNG_FILTER_PAETH) &&
- png_ptr->paeth_row == NULL)
- {
- if (png_ptr->prev_row == NULL)
- {
- png_warning(png_ptr, "Can't add Paeth filter after starting");
- png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH);
- }
-
- else
- {
- png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
- (png_ptr->rowbytes + 1));
- png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
- }
- }
-
- if (png_ptr->do_filter == PNG_NO_FILTERS)
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
- png_ptr->do_filter = PNG_FILTER_NONE;
- }
- }
- else
- png_error(png_ptr, "Unknown custom filter method");
-}
-
-/* This allows us to influence the way in which libpng chooses the "best"
- * filter for the current scanline. While the "minimum-sum-of-absolute-
- * differences metric is relatively fast and effective, there is some
- * question as to whether it can be improved upon by trying to keep the
- * filtered data going to zlib more consistent, hopefully resulting in
- * better compression.
- */
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
-/* Convenience reset API. */
-static void
-png_reset_filter_heuristics(png_structp png_ptr)
-{
- /* Clear out any old values in the 'weights' - this must be done because if
- * the app calls set_filter_heuristics multiple times with different
- * 'num_weights' values we would otherwise potentially have wrong sized
- * arrays.
- */
- png_ptr->num_prev_filters = 0;
- png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED;
- if (png_ptr->prev_filters != NULL)
- {
- png_bytep old = png_ptr->prev_filters;
- png_ptr->prev_filters = NULL;
- png_free(png_ptr, old);
- }
- if (png_ptr->filter_weights != NULL)
- {
- png_uint_16p old = png_ptr->filter_weights;
- png_ptr->filter_weights = NULL;
- png_free(png_ptr, old);
- }
-
- if (png_ptr->inv_filter_weights != NULL)
- {
- png_uint_16p old = png_ptr->inv_filter_weights;
- png_ptr->inv_filter_weights = NULL;
- png_free(png_ptr, old);
- }
-
- /* Leave the filter_costs - this array is fixed size. */
-}
-
-static int
-png_init_filter_heuristics(png_structp png_ptr, int heuristic_method,
- int num_weights)
-{
- if (png_ptr == NULL)
- return 0;
-
- /* Clear out the arrays */
- png_reset_filter_heuristics(png_ptr);
-
- /* Check arguments; the 'reset' function makes the correct settings for the
- * unweighted case, but we must handle the weight case by initializing the
- * arrays for the caller.
- */
- if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int i;
-
- if (num_weights > 0)
- {
- png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_byte) * num_weights));
-
- /* To make sure that the weighting starts out fairly */
- for (i = 0; i < num_weights; i++)
- {
- png_ptr->prev_filters[i] = 255;
- }
-
- png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
-
- png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
-
- for (i = 0; i < num_weights; i++)
- {
- png_ptr->inv_filter_weights[i] =
- png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
- }
-
- /* Safe to set this now */
- png_ptr->num_prev_filters = (png_byte)num_weights;
- }
-
- /* If, in the future, there are other filter methods, this would
- * need to be based on png_ptr->filter.
- */
- if (png_ptr->filter_costs == NULL)
- {
- png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
-
- png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
- }
-
- for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
- {
- png_ptr->inv_filter_costs[i] =
- png_ptr->filter_costs[i] = PNG_COST_FACTOR;
- }
-
- /* All the arrays are inited, safe to set this: */
- png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_WEIGHTED;
-
- /* Return the 'ok' code. */
- return 1;
- }
- else if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT ||
- heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED)
- {
- return 1;
- }
- else
- {
- png_warning(png_ptr, "Unknown filter heuristic method");
- return 0;
- }
-}
-
-/* Provide floating and fixed point APIs */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-void PNGAPI
-png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
- int num_weights, png_const_doublep filter_weights,
- png_const_doublep filter_costs)
-{
- png_debug(1, "in png_set_filter_heuristics");
-
- /* The internal API allocates all the arrays and ensures that the elements of
- * those arrays are set to the default value.
- */
- if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
- return;
-
- /* If using the weighted method copy in the weights. */
- if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int i;
- for (i = 0; i < num_weights; i++)
- {
- if (filter_weights[i] <= 0.0)
- {
- png_ptr->inv_filter_weights[i] =
- png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
- }
-
- else
- {
- png_ptr->inv_filter_weights[i] =
- (png_uint_16)(PNG_WEIGHT_FACTOR*filter_weights[i]+.5);
-
- png_ptr->filter_weights[i] =
- (png_uint_16)(PNG_WEIGHT_FACTOR/filter_weights[i]+.5);
- }
- }
-
- /* Here is where we set the relative costs of the different filters. We
- * should take the desired compression level into account when setting
- * the costs, so that Paeth, for instance, has a high relative cost at low
- * compression levels, while it has a lower relative cost at higher
- * compression settings. The filter types are in order of increasing
- * relative cost, so it would be possible to do this with an algorithm.
- */
- for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) if (filter_costs[i] >= 1.0)
- {
- png_ptr->inv_filter_costs[i] =
- (png_uint_16)(PNG_COST_FACTOR / filter_costs[i] + .5);
-
- png_ptr->filter_costs[i] =
- (png_uint_16)(PNG_COST_FACTOR * filter_costs[i] + .5);
- }
- }
-}
-#endif /* FLOATING_POINT */
-
-#ifdef PNG_FIXED_POINT_SUPPORTED
-void PNGAPI
-png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method,
- int num_weights, png_const_fixed_point_p filter_weights,
- png_const_fixed_point_p filter_costs)
-{
- png_debug(1, "in png_set_filter_heuristics_fixed");
-
- /* The internal API allocates all the arrays and ensures that the elements of
- * those arrays are set to the default value.
- */
- if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
- return;
-
- /* If using the weighted method copy in the weights. */
- if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int i;
- for (i = 0; i < num_weights; i++)
- {
- if (filter_weights[i] <= 0)
- {
- png_ptr->inv_filter_weights[i] =
- png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
- }
-
- else
- {
- png_ptr->inv_filter_weights[i] = (png_uint_16)
- ((PNG_WEIGHT_FACTOR*filter_weights[i]+PNG_FP_HALF)/PNG_FP_1);
-
- png_ptr->filter_weights[i] = (png_uint_16)((PNG_WEIGHT_FACTOR*
- PNG_FP_1+(filter_weights[i]/2))/filter_weights[i]);
- }
- }
-
- /* Here is where we set the relative costs of the different filters. We
- * should take the desired compression level into account when setting
- * the costs, so that Paeth, for instance, has a high relative cost at low
- * compression levels, while it has a lower relative cost at higher
- * compression settings. The filter types are in order of increasing
- * relative cost, so it would be possible to do this with an algorithm.
- */
- for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
- if (filter_costs[i] >= PNG_FP_1)
- {
- png_uint_32 tmp;
-
- /* Use a 32 bit unsigned temporary here because otherwise the
- * intermediate value will be a 32 bit *signed* integer (ANSI rules)
- * and this will get the wrong answer on division.
- */
- tmp = PNG_COST_FACTOR*PNG_FP_1 + (filter_costs[i]/2);
- tmp /= filter_costs[i];
-
- png_ptr->inv_filter_costs[i] = (png_uint_16)tmp;
-
- tmp = PNG_COST_FACTOR * filter_costs[i] + PNG_FP_HALF;
- tmp /= PNG_FP_1;
-
- png_ptr->filter_costs[i] = (png_uint_16)tmp;
- }
- }
-}
-#endif /* FIXED_POINT */
-#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
-
-void PNGAPI
-png_set_compression_level(png_structp png_ptr, int level)
-{
- png_debug(1, "in png_set_compression_level");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
- png_ptr->zlib_level = level;
-}
-
-void PNGAPI
-png_set_compression_mem_level(png_structp png_ptr, int mem_level)
-{
- png_debug(1, "in png_set_compression_mem_level");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
- png_ptr->zlib_mem_level = mem_level;
-}
-
-void PNGAPI
-png_set_compression_strategy(png_structp png_ptr, int strategy)
-{
- png_debug(1, "in png_set_compression_strategy");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
- png_ptr->zlib_strategy = strategy;
-}
-
-void PNGAPI
-png_set_compression_window_bits(png_structp png_ptr, int window_bits)
-{
- if (png_ptr == NULL)
- return;
-
- if (window_bits > 15)
- png_warning(png_ptr, "Only compression windows <= 32k supported by PNG");
-
- else if (window_bits < 8)
- png_warning(png_ptr, "Only compression windows >= 256 supported by PNG");
-
-#ifndef WBITS_8_OK
- /* Avoid libpng bug with 256-byte windows */
- if (window_bits == 8)
- {
- png_warning(png_ptr, "Compression window is being reset to 512");
- window_bits = 9;
- }
-
-#endif
- png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS;
- png_ptr->zlib_window_bits = window_bits;
-}
-
-void PNGAPI
-png_set_compression_method(png_structp png_ptr, int method)
-{
- png_debug(1, "in png_set_compression_method");
-
- if (png_ptr == NULL)
- return;
-
- if (method != 8)
- png_warning(png_ptr, "Only compression method 8 is supported by PNG");
-
- png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD;
- png_ptr->zlib_method = method;
-}
-
-void PNGAPI
-png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
-{
- if (png_ptr == NULL)
- return;
-
- png_ptr->write_row_fn = write_row_fn;
-}
-
-#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
-void PNGAPI
-png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
- write_user_transform_fn)
-{
- png_debug(1, "in png_set_write_user_transform_fn");
-
- if (png_ptr == NULL)
- return;
-
- png_ptr->transformations |= PNG_USER_TRANSFORM;
- png_ptr->write_user_transform_fn = write_user_transform_fn;
-}
-#endif
-
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
-void PNGAPI
-png_write_png(png_structp png_ptr, png_infop info_ptr,
- int transforms, voidp params)
-{
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- /* Write the file header information. */
- png_write_info(png_ptr, info_ptr);
-
- /* ------ these transformations don't touch the info structure ------- */
-
-#ifdef PNG_WRITE_INVERT_SUPPORTED
- /* Invert monochrome pixels */
- if (transforms & PNG_TRANSFORM_INVERT_MONO)
- png_set_invert_mono(png_ptr);
-#endif
-
-#ifdef PNG_WRITE_SHIFT_SUPPORTED
- /* Shift the pixels up to a legal bit depth and fill in
- * as appropriate to correctly scale the image.
- */
- if ((transforms & PNG_TRANSFORM_SHIFT)
- && (info_ptr->valid & PNG_INFO_sBIT))
- png_set_shift(png_ptr, &info_ptr->sig_bit);
-#endif
-
-#ifdef PNG_WRITE_PACK_SUPPORTED
- /* Pack pixels into bytes */
- if (transforms & PNG_TRANSFORM_PACKING)
- png_set_packing(png_ptr);
-#endif
-
-#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
- /* Swap location of alpha bytes from ARGB to RGBA */
- if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
- png_set_swap_alpha(png_ptr);
-#endif
-
-#ifdef PNG_WRITE_FILLER_SUPPORTED
- /* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
- if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
- png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
-
- else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE)
- png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
-#endif
-
-#ifdef PNG_WRITE_BGR_SUPPORTED
- /* Flip BGR pixels to RGB */
- if (transforms & PNG_TRANSFORM_BGR)
- png_set_bgr(png_ptr);
-#endif
-
-#ifdef PNG_WRITE_SWAP_SUPPORTED
- /* Swap bytes of 16-bit files to most significant byte first */
- if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
- png_set_swap(png_ptr);
-#endif
-
-#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
- /* Swap bits of 1, 2, 4 bit packed pixel formats */
- if (transforms & PNG_TRANSFORM_PACKSWAP)
- png_set_packswap(png_ptr);
-#endif
-
-#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
- /* Invert the alpha channel from opacity to transparency */
- if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
- png_set_invert_alpha(png_ptr);
-#endif
-
- /* ----------------------- end of transformations ------------------- */
-
- /* Write the bits */
- if (info_ptr->valid & PNG_INFO_IDAT)
- png_write_image(png_ptr, info_ptr->row_pointers);
-
- /* It is REQUIRED to call this to finish writing the rest of the file */
- png_write_end(png_ptr, info_ptr);
-
- PNG_UNUSED(transforms) /* Quiet compiler warnings */
- PNG_UNUSED(params)
-}
-#endif
-#endif /* PNG_WRITE_SUPPORTED */
+++ /dev/null
-
-/* pngwtran.c - transforms the data in a row for PNG writers
- *
- * Last changed in libpng 1.5.2 [March 31, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_WRITE_SUPPORTED
-
-/* Transform the data according to the user's wishes. The order of
- * transformations is significant.
- */
-void /* PRIVATE */
-png_do_write_transformations(png_structp png_ptr)
-{
- png_debug(1, "in png_do_write_transformations");
-
- if (png_ptr == NULL)
- return;
-
-#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
- if (png_ptr->transformations & PNG_USER_TRANSFORM)
- if (png_ptr->write_user_transform_fn != NULL)
- (*(png_ptr->write_user_transform_fn)) /* User write transform
- function */
- (png_ptr, /* png_ptr */
- &(png_ptr->row_info), /* row_info: */
- /* png_uint_32 width; width of row */
- /* png_size_t rowbytes; number of bytes in row */
- /* png_byte color_type; color type of pixels */
- /* png_byte bit_depth; bit depth of samples */
- /* png_byte channels; number of channels (1-4) */
- /* png_byte pixel_depth; bits per pixel (depth*channels) */
- png_ptr->row_buf + 1); /* start of pixel data for row */
-#endif
-
-#ifdef PNG_WRITE_FILLER_SUPPORTED
- if (png_ptr->transformations & PNG_FILLER)
- png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
- !(png_ptr->flags & PNG_FILLER_AFTER));
-#endif
-
-#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
- if (png_ptr->transformations & PNG_PACKSWAP)
- png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_WRITE_PACK_SUPPORTED
- if (png_ptr->transformations & PNG_PACK)
- png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1,
- (png_uint_32)png_ptr->bit_depth);
-#endif
-
-#ifdef PNG_WRITE_SWAP_SUPPORTED
- if (png_ptr->transformations & PNG_SWAP_BYTES)
- png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_WRITE_SHIFT_SUPPORTED
- if (png_ptr->transformations & PNG_SHIFT)
- png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
- &(png_ptr->shift));
-#endif
-
-#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
- if (png_ptr->transformations & PNG_SWAP_ALPHA)
- png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
- if (png_ptr->transformations & PNG_INVERT_ALPHA)
- png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_WRITE_BGR_SUPPORTED
- if (png_ptr->transformations & PNG_BGR)
- png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
-#ifdef PNG_WRITE_INVERT_SUPPORTED
- if (png_ptr->transformations & PNG_INVERT_MONO)
- png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-}
-
-#ifdef PNG_WRITE_PACK_SUPPORTED
-/* Pack pixels into bytes. Pass the true bit depth in bit_depth. The
- * row_info bit depth should be 8 (one pixel per byte). The channels
- * should be 1 (this only happens on grayscale and paletted images).
- */
-void /* PRIVATE */
-png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
-{
- png_debug(1, "in png_do_pack");
-
- if (row_info->bit_depth == 8 &&
- row_info->channels == 1)
- {
- switch ((int)bit_depth)
- {
- case 1:
- {
- png_bytep sp, dp;
- int mask, v;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- sp = row;
- dp = row;
- mask = 0x80;
- v = 0;
-
- for (i = 0; i < row_width; i++)
- {
- if (*sp != 0)
- v |= mask;
-
- sp++;
-
- if (mask > 1)
- mask >>= 1;
-
- else
- {
- mask = 0x80;
- *dp = (png_byte)v;
- dp++;
- v = 0;
- }
- }
-
- if (mask != 0x80)
- *dp = (png_byte)v;
-
- break;
- }
-
- case 2:
- {
- png_bytep sp, dp;
- int shift, v;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- sp = row;
- dp = row;
- shift = 6;
- v = 0;
-
- for (i = 0; i < row_width; i++)
- {
- png_byte value;
-
- value = (png_byte)(*sp & 0x03);
- v |= (value << shift);
-
- if (shift == 0)
- {
- shift = 6;
- *dp = (png_byte)v;
- dp++;
- v = 0;
- }
-
- else
- shift -= 2;
-
- sp++;
- }
-
- if (shift != 6)
- *dp = (png_byte)v;
-
- break;
- }
-
- case 4:
- {
- png_bytep sp, dp;
- int shift, v;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- sp = row;
- dp = row;
- shift = 4;
- v = 0;
-
- for (i = 0; i < row_width; i++)
- {
- png_byte value;
-
- value = (png_byte)(*sp & 0x0f);
- v |= (value << shift);
-
- if (shift == 0)
- {
- shift = 4;
- *dp = (png_byte)v;
- dp++;
- v = 0;
- }
-
- else
- shift -= 4;
-
- sp++;
- }
-
- if (shift != 4)
- *dp = (png_byte)v;
-
- break;
- }
-
- default:
- break;
- }
-
- row_info->bit_depth = (png_byte)bit_depth;
- row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels);
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
- row_info->width);
- }
-}
-#endif
-
-#ifdef PNG_WRITE_SHIFT_SUPPORTED
-/* Shift pixel values to take advantage of whole range. Pass the
- * true number of bits in bit_depth. The row should be packed
- * according to row_info->bit_depth. Thus, if you had a row of
- * bit depth 4, but the pixels only had values from 0 to 7, you
- * would pass 3 as bit_depth, and this routine would translate the
- * data to 0 to 15.
- */
-void /* PRIVATE */
-png_do_shift(png_row_infop row_info, png_bytep row,
- png_const_color_8p bit_depth)
-{
- png_debug(1, "in png_do_shift");
-
- if (row_info->color_type != PNG_COLOR_TYPE_PALETTE)
- {
- int shift_start[4], shift_dec[4];
- int channels = 0;
-
- if (row_info->color_type & PNG_COLOR_MASK_COLOR)
- {
- shift_start[channels] = row_info->bit_depth - bit_depth->red;
- shift_dec[channels] = bit_depth->red;
- channels++;
-
- shift_start[channels] = row_info->bit_depth - bit_depth->green;
- shift_dec[channels] = bit_depth->green;
- channels++;
-
- shift_start[channels] = row_info->bit_depth - bit_depth->blue;
- shift_dec[channels] = bit_depth->blue;
- channels++;
- }
-
- else
- {
- shift_start[channels] = row_info->bit_depth - bit_depth->gray;
- shift_dec[channels] = bit_depth->gray;
- channels++;
- }
-
- if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
- {
- shift_start[channels] = row_info->bit_depth - bit_depth->alpha;
- shift_dec[channels] = bit_depth->alpha;
- channels++;
- }
-
- /* With low row depths, could only be grayscale, so one channel */
- if (row_info->bit_depth < 8)
- {
- png_bytep bp = row;
- png_size_t i;
- png_byte mask;
- png_size_t row_bytes = row_info->rowbytes;
-
- if (bit_depth->gray == 1 && row_info->bit_depth == 2)
- mask = 0x55;
-
- else if (row_info->bit_depth == 4 && bit_depth->gray == 3)
- mask = 0x11;
-
- else
- mask = 0xff;
-
- for (i = 0; i < row_bytes; i++, bp++)
- {
- png_uint_16 v;
- int j;
-
- v = *bp;
- *bp = 0;
-
- for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0])
- {
- if (j > 0)
- *bp |= (png_byte)((v << j) & 0xff);
-
- else
- *bp |= (png_byte)((v >> (-j)) & mask);
- }
- }
- }
-
- else if (row_info->bit_depth == 8)
- {
- png_bytep bp = row;
- png_uint_32 i;
- png_uint_32 istop = channels * row_info->width;
-
- for (i = 0; i < istop; i++, bp++)
- {
-
- png_uint_16 v;
- int j;
- int c = (int)(i%channels);
-
- v = *bp;
- *bp = 0;
-
- for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
- {
- if (j > 0)
- *bp |= (png_byte)((v << j) & 0xff);
-
- else
- *bp |= (png_byte)((v >> (-j)) & 0xff);
- }
- }
- }
-
- else
- {
- png_bytep bp;
- png_uint_32 i;
- png_uint_32 istop = channels * row_info->width;
-
- for (bp = row, i = 0; i < istop; i++)
- {
- int c = (int)(i%channels);
- png_uint_16 value, v;
- int j;
-
- v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1));
- value = 0;
-
- for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
- {
- if (j > 0)
- value |= (png_uint_16)((v << j) & (png_uint_16)0xffff);
-
- else
- value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff);
- }
- *bp++ = (png_byte)(value >> 8);
- *bp++ = (png_byte)(value & 0xff);
- }
- }
- }
-}
-#endif
-
-#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
-void /* PRIVATE */
-png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_write_swap_alpha");
-
- {
- if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- {
- if (row_info->bit_depth == 8)
- {
- /* This converts from ARGB to RGBA */
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- for (i = 0, sp = dp = row; i < row_width; i++)
- {
- png_byte save = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = save;
- }
- }
-
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- else
- {
- /* This converts from AARRGGBB to RRGGBBAA */
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- for (i = 0, sp = dp = row; i < row_width; i++)
- {
- png_byte save[2];
- save[0] = *(sp++);
- save[1] = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = save[0];
- *(dp++) = save[1];
- }
- }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- {
- if (row_info->bit_depth == 8)
- {
- /* This converts from AG to GA */
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- for (i = 0, sp = dp = row; i < row_width; i++)
- {
- png_byte save = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = save;
- }
- }
-
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- else
- {
- /* This converts from AAGG to GGAA */
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- for (i = 0, sp = dp = row; i < row_width; i++)
- {
- png_byte save[2];
- save[0] = *(sp++);
- save[1] = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = save[0];
- *(dp++) = save[1];
- }
- }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
- }
- }
-}
-#endif
-
-#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
-void /* PRIVATE */
-png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_write_invert_alpha");
-
- {
- if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- {
- if (row_info->bit_depth == 8)
- {
- /* This inverts the alpha channel in RGBA */
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- for (i = 0, sp = dp = row; i < row_width; i++)
- {
- /* Does nothing
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- */
- sp+=3; dp = sp;
- *(dp++) = (png_byte)(255 - *(sp++));
- }
- }
-
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- else
- {
- /* This inverts the alpha channel in RRGGBBAA */
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- for (i = 0, sp = dp = row; i < row_width; i++)
- {
- /* Does nothing
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- */
- sp+=6; dp = sp;
- *(dp++) = (png_byte)(255 - *(sp++));
- *(dp++) = (png_byte)(255 - *(sp++));
- }
- }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
- }
-
- else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
- {
- if (row_info->bit_depth == 8)
- {
- /* This inverts the alpha channel in GA */
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- for (i = 0, sp = dp = row; i < row_width; i++)
- {
- *(dp++) = *(sp++);
- *(dp++) = (png_byte)(255 - *(sp++));
- }
- }
-
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- else
- {
- /* This inverts the alpha channel in GGAA */
- png_bytep sp, dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- for (i = 0, sp = dp = row; i < row_width; i++)
- {
- /* Does nothing
- *(dp++) = *(sp++);
- *(dp++) = *(sp++);
- */
- sp+=2; dp = sp;
- *(dp++) = (png_byte)(255 - *(sp++));
- *(dp++) = (png_byte)(255 - *(sp++));
- }
- }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
- }
- }
-}
-#endif
-
-#ifdef PNG_MNG_FEATURES_SUPPORTED
-/* Undoes intrapixel differencing */
-void /* PRIVATE */
-png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
-{
- png_debug(1, "in png_do_write_intrapixel");
-
- if ((row_info->color_type & PNG_COLOR_MASK_COLOR))
- {
- int bytes_per_pixel;
- png_uint_32 row_width = row_info->width;
- if (row_info->bit_depth == 8)
- {
- png_bytep rp;
- png_uint_32 i;
-
- if (row_info->color_type == PNG_COLOR_TYPE_RGB)
- bytes_per_pixel = 3;
-
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- bytes_per_pixel = 4;
-
- else
- return;
-
- for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
- {
- *(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff);
- *(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff);
- }
- }
-
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- else if (row_info->bit_depth == 16)
- {
- png_bytep rp;
- png_uint_32 i;
-
- if (row_info->color_type == PNG_COLOR_TYPE_RGB)
- bytes_per_pixel = 6;
-
- else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- bytes_per_pixel = 8;
-
- else
- return;
-
- for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
- {
- png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1);
- png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3);
- png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
- png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL);
- png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL);
- *(rp ) = (png_byte)((red >> 8) & 0xff);
- *(rp + 1) = (png_byte)(red & 0xff);
- *(rp + 4) = (png_byte)((blue >> 8) & 0xff);
- *(rp + 5) = (png_byte)(blue & 0xff);
- }
- }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
- }
-}
-#endif /* PNG_MNG_FEATURES_SUPPORTED */
-#endif /* PNG_WRITE_SUPPORTED */
+++ /dev/null
-
-/* pngwutil.c - utilities to write a PNG file
- *
- * Last changed in libpng 1.5.0 [January 6, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-#include "pngpriv.h"
-
-#ifdef PNG_WRITE_SUPPORTED
-
-#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
-/* Place a 32-bit number into a buffer in PNG byte order. We work
- * with unsigned numbers for convenience, although one supported
- * ancillary chunk uses signed (two's complement) numbers.
- */
-void PNGAPI
-png_save_uint_32(png_bytep buf, png_uint_32 i)
-{
- buf[0] = (png_byte)((i >> 24) & 0xff);
- buf[1] = (png_byte)((i >> 16) & 0xff);
- buf[2] = (png_byte)((i >> 8) & 0xff);
- buf[3] = (png_byte)(i & 0xff);
-}
-
-#ifdef PNG_SAVE_INT_32_SUPPORTED
-/* The png_save_int_32 function assumes integers are stored in two's
- * complement format. If this isn't the case, then this routine needs to
- * be modified to write data in two's complement format. Note that,
- * the following works correctly even if png_int_32 has more than 32 bits
- * (compare the more complex code required on read for sign extention.)
- */
-void PNGAPI
-png_save_int_32(png_bytep buf, png_int_32 i)
-{
- buf[0] = (png_byte)((i >> 24) & 0xff);
- buf[1] = (png_byte)((i >> 16) & 0xff);
- buf[2] = (png_byte)((i >> 8) & 0xff);
- buf[3] = (png_byte)(i & 0xff);
-}
-#endif
-
-/* Place a 16-bit number into a buffer in PNG byte order.
- * The parameter is declared unsigned int, not png_uint_16,
- * just to avoid potential problems on pre-ANSI C compilers.
- */
-void PNGAPI
-png_save_uint_16(png_bytep buf, unsigned int i)
-{
- buf[0] = (png_byte)((i >> 8) & 0xff);
- buf[1] = (png_byte)(i & 0xff);
-}
-#endif
-
-/* Simple function to write the signature. If we have already written
- * the magic bytes of the signature, or more likely, the PNG stream is
- * being embedded into another stream and doesn't need its own signature,
- * we should call png_set_sig_bytes() to tell libpng how many of the
- * bytes have already been written.
- */
-void PNGAPI
-png_write_sig(png_structp png_ptr)
-{
- png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
-
-#ifdef PNG_IO_STATE_SUPPORTED
- /* Inform the I/O callback that the signature is being written */
- png_ptr->io_state = PNG_IO_WRITING | PNG_IO_SIGNATURE;
-#endif
-
- /* Write the rest of the 8 byte signature */
- png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
- (png_size_t)(8 - png_ptr->sig_bytes));
-
- if (png_ptr->sig_bytes < 3)
- png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
-}
-
-/* Write a PNG chunk all at once. The type is an array of ASCII characters
- * representing the chunk name. The array must be at least 4 bytes in
- * length, and does not need to be null terminated. To be safe, pass the
- * pre-defined chunk names here, and if you need a new one, define it
- * where the others are defined. The length is the length of the data.
- * All the data must be present. If that is not possible, use the
- * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end()
- * functions instead.
- */
-void PNGAPI
-png_write_chunk(png_structp png_ptr, png_const_bytep chunk_name,
- png_const_bytep data, png_size_t length)
-{
- if (png_ptr == NULL)
- return;
-
- png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
- png_write_chunk_data(png_ptr, data, (png_size_t)length);
- png_write_chunk_end(png_ptr);
-}
-
-/* Write the start of a PNG chunk. The type is the chunk type.
- * The total_length is the sum of the lengths of all the data you will be
- * passing in png_write_chunk_data().
- */
-void PNGAPI
-png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name,
- png_uint_32 length)
-{
- png_byte buf[8];
-
- png_debug2(0, "Writing %s chunk, length = %lu", chunk_name,
- (unsigned long)length);
-
- if (png_ptr == NULL)
- return;
-
-#ifdef PNG_IO_STATE_SUPPORTED
- /* Inform the I/O callback that the chunk header is being written.
- * PNG_IO_CHUNK_HDR requires a single I/O call.
- */
- png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_HDR;
-#endif
-
- /* Write the length and the chunk name */
- png_save_uint_32(buf, length);
- png_memcpy(buf + 4, chunk_name, 4);
- png_write_data(png_ptr, buf, (png_size_t)8);
-
- /* Put the chunk name into png_ptr->chunk_name */
- png_memcpy(png_ptr->chunk_name, chunk_name, 4);
-
- /* Reset the crc and run it over the chunk name */
- png_reset_crc(png_ptr);
-
- png_calculate_crc(png_ptr, chunk_name, 4);
-
-#ifdef PNG_IO_STATE_SUPPORTED
- /* Inform the I/O callback that chunk data will (possibly) be written.
- * PNG_IO_CHUNK_DATA does NOT require a specific number of I/O calls.
- */
- png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_DATA;
-#endif
-}
-
-/* Write the data of a PNG chunk started with png_write_chunk_start().
- * Note that multiple calls to this function are allowed, and that the
- * sum of the lengths from these calls *must* add up to the total_length
- * given to png_write_chunk_start().
- */
-void PNGAPI
-png_write_chunk_data(png_structp png_ptr, png_const_bytep data,
- png_size_t length)
-{
- /* Write the data, and run the CRC over it */
- if (png_ptr == NULL)
- return;
-
- if (data != NULL && length > 0)
- {
- png_write_data(png_ptr, data, length);
-
- /* Update the CRC after writing the data,
- * in case that the user I/O routine alters it.
- */
- png_calculate_crc(png_ptr, data, length);
- }
-}
-
-/* Finish a chunk started with png_write_chunk_start(). */
-void PNGAPI
-png_write_chunk_end(png_structp png_ptr)
-{
- png_byte buf[4];
-
- if (png_ptr == NULL) return;
-
-#ifdef PNG_IO_STATE_SUPPORTED
- /* Inform the I/O callback that the chunk CRC is being written.
- * PNG_IO_CHUNK_CRC requires a single I/O function call.
- */
- png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_CRC;
-#endif
-
- /* Write the crc in a single operation */
- png_save_uint_32(buf, png_ptr->crc);
-
- png_write_data(png_ptr, buf, (png_size_t)4);
-}
-
-#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_iCCP_SUPPORTED)
-/* This pair of functions encapsulates the operation of (a) compressing a
- * text string, and (b) issuing it later as a series of chunk data writes.
- * The compression_state structure is shared context for these functions
- * set up by the caller in order to make the whole mess thread-safe.
- */
-
-typedef struct
-{
- png_const_bytep input; /* The uncompressed input data */
- png_size_t input_len; /* Its length */
- int num_output_ptr; /* Number of output pointers used */
- int max_output_ptr; /* Size of output_ptr */
- png_bytep *output_ptr; /* Array of pointers to output */
-} compression_state;
-
-/* Compress given text into storage in the png_ptr structure */
-static int /* PRIVATE */
-png_text_compress(png_structp png_ptr,
- png_const_charp text, png_size_t text_len, int compression,
- compression_state *comp)
-{
- int ret;
-
- comp->num_output_ptr = 0;
- comp->max_output_ptr = 0;
- comp->output_ptr = NULL;
- comp->input = NULL;
- comp->input_len = 0;
-
- /* We may just want to pass the text right through */
- if (compression == PNG_TEXT_COMPRESSION_NONE)
- {
- comp->input = (png_const_bytep)text;
- comp->input_len = text_len;
- return((int)text_len);
- }
-
- if (compression >= PNG_TEXT_COMPRESSION_LAST)
- {
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- char msg[50];
- png_snprintf(msg, 50, "Unknown compression type %d", compression);
- png_warning(png_ptr, msg);
-#else
- png_warning(png_ptr, "Unknown compression type");
-#endif
- }
-
- /* We can't write the chunk until we find out how much data we have,
- * which means we need to run the compressor first and save the
- * output. This shouldn't be a problem, as the vast majority of
- * comments should be reasonable, but we will set up an array of
- * malloc'd pointers to be sure.
- *
- * If we knew the application was well behaved, we could simplify this
- * greatly by assuming we can always malloc an output buffer large
- * enough to hold the compressed text ((1001 * text_len / 1000) + 12)
- * and malloc this directly. The only time this would be a bad idea is
- * if we can't malloc more than 64K and we have 64K of random input
- * data, or if the input string is incredibly large (although this
- * wouldn't cause a failure, just a slowdown due to swapping).
- */
-
- /* Set up the compression buffers */
- /* TODO: the following cast hides a potential overflow problem. */
- png_ptr->zstream.avail_in = (uInt)text_len;
- /* NOTE: assume zlib doesn't overwrite the input */
- png_ptr->zstream.next_in = (Bytef *)text;
- png_ptr->zstream.avail_out = png_ptr->zbuf_size;
- png_ptr->zstream.next_out = png_ptr->zbuf;
-
- /* This is the same compression loop as in png_write_row() */
- do
- {
- /* Compress the data */
- ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
-
- if (ret != Z_OK)
- {
- /* Error */
- if (png_ptr->zstream.msg != NULL)
- png_error(png_ptr, png_ptr->zstream.msg);
-
- else
- png_error(png_ptr, "zlib error");
- }
-
- /* Check to see if we need more room */
- if (!(png_ptr->zstream.avail_out))
- {
- /* Make sure the output array has room */
- if (comp->num_output_ptr >= comp->max_output_ptr)
- {
- int old_max;
-
- old_max = comp->max_output_ptr;
- comp->max_output_ptr = comp->num_output_ptr + 4;
- if (comp->output_ptr != NULL)
- {
- png_bytepp old_ptr;
-
- old_ptr = comp->output_ptr;
-
- comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
- (png_alloc_size_t)
- (comp->max_output_ptr * png_sizeof(png_charpp)));
-
- png_memcpy(comp->output_ptr, old_ptr, old_max
- * png_sizeof(png_charp));
-
- png_free(png_ptr, old_ptr);
- }
- else
- comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
- (png_alloc_size_t)
- (comp->max_output_ptr * png_sizeof(png_charp)));
- }
-
- /* Save the data */
- comp->output_ptr[comp->num_output_ptr] =
- (png_bytep)png_malloc(png_ptr,
- (png_alloc_size_t)png_ptr->zbuf_size);
-
- png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
- png_ptr->zbuf_size);
-
- comp->num_output_ptr++;
-
- /* and reset the buffer */
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_out = png_ptr->zbuf;
- }
- /* Continue until we don't have any more to compress */
- } while (png_ptr->zstream.avail_in);
-
- /* Finish the compression */
- do
- {
- /* Tell zlib we are finished */
- ret = deflate(&png_ptr->zstream, Z_FINISH);
-
- if (ret == Z_OK)
- {
- /* Check to see if we need more room */
- if (!(png_ptr->zstream.avail_out))
- {
- /* Check to make sure our output array has room */
- if (comp->num_output_ptr >= comp->max_output_ptr)
- {
- int old_max;
-
- old_max = comp->max_output_ptr;
- comp->max_output_ptr = comp->num_output_ptr + 4;
- if (comp->output_ptr != NULL)
- {
- png_bytepp old_ptr;
-
- old_ptr = comp->output_ptr;
-
- /* This could be optimized to realloc() */
- comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
- (png_alloc_size_t)(comp->max_output_ptr *
- png_sizeof(png_charp)));
-
- png_memcpy(comp->output_ptr, old_ptr,
- old_max * png_sizeof(png_charp));
-
- png_free(png_ptr, old_ptr);
- }
-
- else
- comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
- (png_alloc_size_t)(comp->max_output_ptr *
- png_sizeof(png_charp)));
- }
-
- /* Save the data */
- comp->output_ptr[comp->num_output_ptr] =
- (png_bytep)png_malloc(png_ptr,
- (png_alloc_size_t)png_ptr->zbuf_size);
-
- png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
- png_ptr->zbuf_size);
-
- comp->num_output_ptr++;
-
- /* and reset the buffer pointers */
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_out = png_ptr->zbuf;
- }
- }
- else if (ret != Z_STREAM_END)
- {
- /* We got an error */
- if (png_ptr->zstream.msg != NULL)
- png_error(png_ptr, png_ptr->zstream.msg);
-
- else
- png_error(png_ptr, "zlib error");
- }
- } while (ret != Z_STREAM_END);
-
- /* Text length is number of buffers plus last buffer */
- text_len = png_ptr->zbuf_size * comp->num_output_ptr;
-
- if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
- text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out;
-
- return((int)text_len);
-}
-
-/* Ship the compressed text out via chunk writes */
-static void /* PRIVATE */
-png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
-{
- int i;
-
- /* Handle the no-compression case */
- if (comp->input)
- {
- png_write_chunk_data(png_ptr, comp->input, comp->input_len);
-
- return;
- }
-
- /* Write saved output buffers, if any */
- for (i = 0; i < comp->num_output_ptr; i++)
- {
- png_write_chunk_data(png_ptr, comp->output_ptr[i],
- (png_size_t)png_ptr->zbuf_size);
-
- png_free(png_ptr, comp->output_ptr[i]);
- }
-
- if (comp->max_output_ptr != 0)
- png_free(png_ptr, comp->output_ptr);
-
- /* Write anything left in zbuf */
- if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
- png_write_chunk_data(png_ptr, png_ptr->zbuf,
- (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
-
- /* Reset zlib for another zTXt/iTXt or image data */
- deflateReset(&png_ptr->zstream);
- png_ptr->zstream.data_type = Z_BINARY;
-}
-#endif
-
-/* Write the IHDR chunk, and update the png_struct with the necessary
- * information. Note that the rest of this code depends upon this
- * information being correct.
- */
-void /* PRIVATE */
-png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
- int bit_depth, int color_type, int compression_type, int filter_type,
- int interlace_type)
-{
- PNG_IHDR;
- int ret;
-
- png_byte buf[13]; /* Buffer to store the IHDR info */
-
- png_debug(1, "in png_write_IHDR");
-
- /* Check that we have valid input data from the application info */
- switch (color_type)
- {
- case PNG_COLOR_TYPE_GRAY:
- switch (bit_depth)
- {
- case 1:
- case 2:
- case 4:
- case 8:
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- case 16:
-#endif
- png_ptr->channels = 1; break;
-
- default:
- png_error(png_ptr,
- "Invalid bit depth for grayscale image");
- }
- break;
-
- case PNG_COLOR_TYPE_RGB:
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- if (bit_depth != 8 && bit_depth != 16)
-#else
- if (bit_depth != 8)
-#endif
- png_error(png_ptr, "Invalid bit depth for RGB image");
-
- png_ptr->channels = 3;
- break;
-
- case PNG_COLOR_TYPE_PALETTE:
- switch (bit_depth)
- {
- case 1:
- case 2:
- case 4:
- case 8:
- png_ptr->channels = 1;
- break;
-
- default:
- png_error(png_ptr, "Invalid bit depth for paletted image");
- }
- break;
-
- case PNG_COLOR_TYPE_GRAY_ALPHA:
- if (bit_depth != 8 && bit_depth != 16)
- png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");
-
- png_ptr->channels = 2;
- break;
-
- case PNG_COLOR_TYPE_RGB_ALPHA:
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- if (bit_depth != 8 && bit_depth != 16)
-#else
- if (bit_depth != 8)
-#endif
- png_error(png_ptr, "Invalid bit depth for RGBA image");
-
- png_ptr->channels = 4;
- break;
-
- default:
- png_error(png_ptr, "Invalid image color type specified");
- }
-
- if (compression_type != PNG_COMPRESSION_TYPE_BASE)
- {
- png_warning(png_ptr, "Invalid compression type specified");
- compression_type = PNG_COMPRESSION_TYPE_BASE;
- }
-
- /* Write filter_method 64 (intrapixel differencing) only if
- * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
- * 2. Libpng did not write a PNG signature (this filter_method is only
- * used in PNG datastreams that are embedded in MNG datastreams) and
- * 3. The application called png_permit_mng_features with a mask that
- * included PNG_FLAG_MNG_FILTER_64 and
- * 4. The filter_method is 64 and
- * 5. The color_type is RGB or RGBA
- */
- if (
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
- (color_type == PNG_COLOR_TYPE_RGB ||
- color_type == PNG_COLOR_TYPE_RGB_ALPHA) &&
- (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) &&
-#endif
- filter_type != PNG_FILTER_TYPE_BASE)
- {
- png_warning(png_ptr, "Invalid filter type specified");
- filter_type = PNG_FILTER_TYPE_BASE;
- }
-
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- if (interlace_type != PNG_INTERLACE_NONE &&
- interlace_type != PNG_INTERLACE_ADAM7)
- {
- png_warning(png_ptr, "Invalid interlace type specified");
- interlace_type = PNG_INTERLACE_ADAM7;
- }
-#else
- interlace_type=PNG_INTERLACE_NONE;
-#endif
-
- /* Save the relevent information */
- png_ptr->bit_depth = (png_byte)bit_depth;
- png_ptr->color_type = (png_byte)color_type;
- png_ptr->interlaced = (png_byte)interlace_type;
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- png_ptr->filter_type = (png_byte)filter_type;
-#endif
- png_ptr->compression_type = (png_byte)compression_type;
- png_ptr->width = width;
- png_ptr->height = height;
-
- png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels);
- png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
- /* Set the usr info, so any transformations can modify it */
- png_ptr->usr_width = png_ptr->width;
- png_ptr->usr_bit_depth = png_ptr->bit_depth;
- png_ptr->usr_channels = png_ptr->channels;
-
- /* Pack the header information into the buffer */
- png_save_uint_32(buf, width);
- png_save_uint_32(buf + 4, height);
- buf[8] = (png_byte)bit_depth;
- buf[9] = (png_byte)color_type;
- buf[10] = (png_byte)compression_type;
- buf[11] = (png_byte)filter_type;
- buf[12] = (png_byte)interlace_type;
-
- /* Write the chunk */
- png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
-
- /* Initialize zlib with PNG info */
- png_ptr->zstream.zalloc = png_zalloc;
- png_ptr->zstream.zfree = png_zfree;
- png_ptr->zstream.opaque = (voidpf)png_ptr;
-
- if (!(png_ptr->do_filter))
- {
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
- png_ptr->bit_depth < 8)
- png_ptr->do_filter = PNG_FILTER_NONE;
-
- else
- png_ptr->do_filter = PNG_ALL_FILTERS;
- }
-
- if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY))
- {
- if (png_ptr->do_filter != PNG_FILTER_NONE)
- png_ptr->zlib_strategy = Z_FILTERED;
-
- else
- png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY;
- }
-
- if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL))
- png_ptr->zlib_level = Z_DEFAULT_COMPRESSION;
-
- if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL))
- png_ptr->zlib_mem_level = 8;
-
- if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS))
- png_ptr->zlib_window_bits = 15;
-
- if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD))
- png_ptr->zlib_method = 8;
-
- ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level,
- png_ptr->zlib_method, png_ptr->zlib_window_bits,
- png_ptr->zlib_mem_level, png_ptr->zlib_strategy);
-
- if (ret != Z_OK)
- {
- if (ret == Z_VERSION_ERROR)
- png_error(png_ptr,
- "zlib failed to initialize compressor -- version error");
-
- if (ret == Z_STREAM_ERROR)
- png_error(png_ptr,
- "zlib failed to initialize compressor -- stream error");
-
- if (ret == Z_MEM_ERROR)
- png_error(png_ptr,
- "zlib failed to initialize compressor -- mem error");
-
- png_error(png_ptr, "zlib failed to initialize compressor");
- }
-
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- /* libpng is not interested in zstream.data_type, so set it
- * to a predefined value, to avoid its evaluation inside zlib
- */
- png_ptr->zstream.data_type = Z_BINARY;
-
- png_ptr->mode = PNG_HAVE_IHDR;
-}
-
-/* Write the palette. We are careful not to trust png_color to be in the
- * correct order for PNG, so people can redefine it to any convenient
- * structure.
- */
-void /* PRIVATE */
-png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
- png_uint_32 num_pal)
-{
- PNG_PLTE;
- png_uint_32 i;
- png_const_colorp pal_ptr;
- png_byte buf[3];
-
- png_debug(1, "in png_write_PLTE");
-
- if ((
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
-#endif
- num_pal == 0) || num_pal > 256)
- {
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- png_error(png_ptr, "Invalid number of colors in palette");
- }
-
- else
- {
- png_warning(png_ptr, "Invalid number of colors in palette");
- return;
- }
- }
-
- if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
- {
- png_warning(png_ptr,
- "Ignoring request to write a PLTE chunk in grayscale PNG");
-
- return;
- }
-
- png_ptr->num_palette = (png_uint_16)num_pal;
- png_debug1(3, "num_palette = %d", png_ptr->num_palette);
-
- png_write_chunk_start(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
-#ifdef PNG_POINTER_INDEXING_SUPPORTED
-
- for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++)
- {
- buf[0] = pal_ptr->red;
- buf[1] = pal_ptr->green;
- buf[2] = pal_ptr->blue;
- png_write_chunk_data(png_ptr, buf, (png_size_t)3);
- }
-
-#else
- /* This is a little slower but some buggy compilers need to do this
- * instead
- */
- pal_ptr=palette;
-
- for (i = 0; i < num_pal; i++)
- {
- buf[0] = pal_ptr[i].red;
- buf[1] = pal_ptr[i].green;
- buf[2] = pal_ptr[i].blue;
- png_write_chunk_data(png_ptr, buf, (png_size_t)3);
- }
-
-#endif
- png_write_chunk_end(png_ptr);
- png_ptr->mode |= PNG_HAVE_PLTE;
-}
-
-/* Write an IDAT chunk */
-void /* PRIVATE */
-png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
-{
- PNG_IDAT;
-
- png_debug(1, "in png_write_IDAT");
-
- /* Optimize the CMF field in the zlib stream. */
- /* This hack of the zlib stream is compliant to the stream specification. */
- if (!(png_ptr->mode & PNG_HAVE_IDAT) &&
- png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
- {
- unsigned int z_cmf = data[0]; /* zlib compression method and flags */
- if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70)
- {
- /* Avoid memory underflows and multiplication overflows.
- *
- * The conditions below are practically always satisfied;
- * however, they still must be checked.
- */
- if (length >= 2 &&
- png_ptr->height < 16384 && png_ptr->width < 16384)
- {
- png_uint_32 uncompressed_idat_size = png_ptr->height *
- ((png_ptr->width *
- png_ptr->channels * png_ptr->bit_depth + 15) >> 3);
- unsigned int z_cinfo = z_cmf >> 4;
- unsigned int half_z_window_size = 1 << (z_cinfo + 7);
- while (uncompressed_idat_size <= half_z_window_size &&
- half_z_window_size >= 256)
- {
- z_cinfo--;
- half_z_window_size >>= 1;
- }
-
- z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4);
-
- if (data[0] != z_cmf)
- {
- int tmp;
- data[0] = (png_byte)z_cmf;
- tmp = data[1] & 0xe0;
- tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f;
- data[1] = (png_byte)tmp;
- }
- }
- }
-
- else
- png_error(png_ptr,
- "Invalid zlib compression method or flags in IDAT");
- }
-
- png_write_chunk(png_ptr, png_IDAT, data, length);
- png_ptr->mode |= PNG_HAVE_IDAT;
-}
-
-/* Write an IEND chunk */
-void /* PRIVATE */
-png_write_IEND(png_structp png_ptr)
-{
- PNG_IEND;
-
- png_debug(1, "in png_write_IEND");
-
- png_write_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
- png_ptr->mode |= PNG_HAVE_IEND;
-}
-
-#ifdef PNG_WRITE_gAMA_SUPPORTED
-/* Write a gAMA chunk */
-void /* PRIVATE */
-png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
-{
- PNG_gAMA;
- png_byte buf[4];
-
- png_debug(1, "in png_write_gAMA");
-
- /* file_gamma is saved in 1/100,000ths */
- png_save_uint_32(buf, (png_uint_32)file_gamma);
- png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
-}
-#endif
-
-#ifdef PNG_WRITE_sRGB_SUPPORTED
-/* Write a sRGB chunk */
-void /* PRIVATE */
-png_write_sRGB(png_structp png_ptr, int srgb_intent)
-{
- PNG_sRGB;
- png_byte buf[1];
-
- png_debug(1, "in png_write_sRGB");
-
- if (srgb_intent >= PNG_sRGB_INTENT_LAST)
- png_warning(png_ptr,
- "Invalid sRGB rendering intent specified");
-
- buf[0]=(png_byte)srgb_intent;
- png_write_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
-}
-#endif
-
-#ifdef PNG_WRITE_iCCP_SUPPORTED
-/* Write an iCCP chunk */
-void /* PRIVATE */
-png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
- png_const_charp profile, int profile_len)
-{
- PNG_iCCP;
- png_size_t name_len;
- png_charp new_name;
- compression_state comp;
- int embedded_profile_len = 0;
-
- png_debug(1, "in png_write_iCCP");
-
- comp.num_output_ptr = 0;
- comp.max_output_ptr = 0;
- comp.output_ptr = NULL;
- comp.input = NULL;
- comp.input_len = 0;
-
- if ((name_len = png_check_keyword(png_ptr, name, &new_name)) == 0)
- return;
-
- if (compression_type != PNG_COMPRESSION_TYPE_BASE)
- png_warning(png_ptr, "Unknown compression type in iCCP chunk");
-
- if (profile == NULL)
- profile_len = 0;
-
- if (profile_len > 3)
- embedded_profile_len =
- ((*( (png_const_bytep)profile ))<<24) |
- ((*( (png_const_bytep)profile + 1))<<16) |
- ((*( (png_const_bytep)profile + 2))<< 8) |
- ((*( (png_const_bytep)profile + 3)) );
-
- if (embedded_profile_len < 0)
- {
- png_warning(png_ptr,
- "Embedded profile length in iCCP chunk is negative");
-
- png_free(png_ptr, new_name);
- return;
- }
-
- if (profile_len < embedded_profile_len)
- {
- png_warning(png_ptr,
- "Embedded profile length too large in iCCP chunk");
-
- png_free(png_ptr, new_name);
- return;
- }
-
- if (profile_len > embedded_profile_len)
- {
- png_warning(png_ptr,
- "Truncating profile to actual length in iCCP chunk");
-
- profile_len = embedded_profile_len;
- }
-
- if (profile_len)
- profile_len = png_text_compress(png_ptr, profile,
- (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
-
- /* Make sure we include the NULL after the name and the compression type */
- png_write_chunk_start(png_ptr, png_iCCP,
- (png_uint_32)(name_len + profile_len + 2));
-
- new_name[name_len + 1] = 0x00;
-
- png_write_chunk_data(png_ptr, (png_bytep)new_name,
- (png_size_t)(name_len + 2));
-
- if (profile_len)
- png_write_compressed_data_out(png_ptr, &comp);
-
- png_write_chunk_end(png_ptr);
- png_free(png_ptr, new_name);
-}
-#endif
-
-#ifdef PNG_WRITE_sPLT_SUPPORTED
-/* Write a sPLT chunk */
-void /* PRIVATE */
-png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
-{
- PNG_sPLT;
- png_size_t name_len;
- png_charp new_name;
- png_byte entrybuf[10];
- png_size_t entry_size = (spalette->depth == 8 ? 6 : 10);
- png_size_t palette_size = entry_size * spalette->nentries;
- png_sPLT_entryp ep;
-#ifndef PNG_POINTER_INDEXING_SUPPORTED
- int i;
-#endif
-
- png_debug(1, "in png_write_sPLT");
-
- if ((name_len = png_check_keyword(png_ptr,spalette->name, &new_name))==0)
- return;
-
- /* Make sure we include the NULL after the name */
- png_write_chunk_start(png_ptr, png_sPLT,
- (png_uint_32)(name_len + 2 + palette_size));
-
- png_write_chunk_data(png_ptr, (png_bytep)new_name,
- (png_size_t)(name_len + 1));
-
- png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1);
-
- /* Loop through each palette entry, writing appropriately */
-#ifdef PNG_POINTER_INDEXING_SUPPORTED
- for (ep = spalette->entries; ep<spalette->entries + spalette->nentries; ep++)
- {
- if (spalette->depth == 8)
- {
- entrybuf[0] = (png_byte)ep->red;
- entrybuf[1] = (png_byte)ep->green;
- entrybuf[2] = (png_byte)ep->blue;
- entrybuf[3] = (png_byte)ep->alpha;
- png_save_uint_16(entrybuf + 4, ep->frequency);
- }
-
- else
- {
- png_save_uint_16(entrybuf + 0, ep->red);
- png_save_uint_16(entrybuf + 2, ep->green);
- png_save_uint_16(entrybuf + 4, ep->blue);
- png_save_uint_16(entrybuf + 6, ep->alpha);
- png_save_uint_16(entrybuf + 8, ep->frequency);
- }
-
- png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
- }
-#else
- ep=spalette->entries;
- for (i = 0; i>spalette->nentries; i++)
- {
- if (spalette->depth == 8)
- {
- entrybuf[0] = (png_byte)ep[i].red;
- entrybuf[1] = (png_byte)ep[i].green;
- entrybuf[2] = (png_byte)ep[i].blue;
- entrybuf[3] = (png_byte)ep[i].alpha;
- png_save_uint_16(entrybuf + 4, ep[i].frequency);
- }
-
- else
- {
- png_save_uint_16(entrybuf + 0, ep[i].red);
- png_save_uint_16(entrybuf + 2, ep[i].green);
- png_save_uint_16(entrybuf + 4, ep[i].blue);
- png_save_uint_16(entrybuf + 6, ep[i].alpha);
- png_save_uint_16(entrybuf + 8, ep[i].frequency);
- }
-
- png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
- }
-#endif
-
- png_write_chunk_end(png_ptr);
- png_free(png_ptr, new_name);
-}
-#endif
-
-#ifdef PNG_WRITE_sBIT_SUPPORTED
-/* Write the sBIT chunk */
-void /* PRIVATE */
-png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type)
-{
- PNG_sBIT;
- png_byte buf[4];
- png_size_t size;
-
- png_debug(1, "in png_write_sBIT");
-
- /* Make sure we don't depend upon the order of PNG_COLOR_8 */
- if (color_type & PNG_COLOR_MASK_COLOR)
- {
- png_byte maxbits;
-
- maxbits = (png_byte)(color_type==PNG_COLOR_TYPE_PALETTE ? 8 :
- png_ptr->usr_bit_depth);
-
- if (sbit->red == 0 || sbit->red > maxbits ||
- sbit->green == 0 || sbit->green > maxbits ||
- sbit->blue == 0 || sbit->blue > maxbits)
- {
- png_warning(png_ptr, "Invalid sBIT depth specified");
- return;
- }
-
- buf[0] = sbit->red;
- buf[1] = sbit->green;
- buf[2] = sbit->blue;
- size = 3;
- }
-
- else
- {
- if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth)
- {
- png_warning(png_ptr, "Invalid sBIT depth specified");
- return;
- }
-
- buf[0] = sbit->gray;
- size = 1;
- }
-
- if (color_type & PNG_COLOR_MASK_ALPHA)
- {
- if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth)
- {
- png_warning(png_ptr, "Invalid sBIT depth specified");
- return;
- }
-
- buf[size++] = sbit->alpha;
- }
-
- png_write_chunk(png_ptr, png_sBIT, buf, size);
-}
-#endif
-
-#ifdef PNG_WRITE_cHRM_SUPPORTED
-/* Write the cHRM chunk */
-void /* PRIVATE */
-png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
- png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y,
- png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x,
- png_fixed_point blue_y)
-{
- PNG_cHRM;
- png_byte buf[32];
-
- png_debug(1, "in png_write_cHRM");
-
- /* Each value is saved in 1/100,000ths */
-#ifdef PNG_CHECK_cHRM_SUPPORTED
- if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y,
- green_x, green_y, blue_x, blue_y))
-#endif
- {
- png_save_uint_32(buf, (png_uint_32)white_x);
- png_save_uint_32(buf + 4, (png_uint_32)white_y);
-
- png_save_uint_32(buf + 8, (png_uint_32)red_x);
- png_save_uint_32(buf + 12, (png_uint_32)red_y);
-
- png_save_uint_32(buf + 16, (png_uint_32)green_x);
- png_save_uint_32(buf + 20, (png_uint_32)green_y);
-
- png_save_uint_32(buf + 24, (png_uint_32)blue_x);
- png_save_uint_32(buf + 28, (png_uint_32)blue_y);
-
- png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
- }
-}
-#endif
-
-#ifdef PNG_WRITE_tRNS_SUPPORTED
-/* Write the tRNS chunk */
-void /* PRIVATE */
-png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
- png_const_color_16p tran, int num_trans, int color_type)
-{
- PNG_tRNS;
- png_byte buf[6];
-
- png_debug(1, "in png_write_tRNS");
-
- if (color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette)
- {
- png_warning(png_ptr, "Invalid number of transparent colors specified");
- return;
- }
-
- /* Write the chunk out as it is */
- png_write_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans);
- }
-
- else if (color_type == PNG_COLOR_TYPE_GRAY)
- {
- /* One 16 bit value */
- if (tran->gray >= (1 << png_ptr->bit_depth))
- {
- png_warning(png_ptr,
- "Ignoring attempt to write tRNS chunk out-of-range for bit_depth");
-
- return;
- }
-
- png_save_uint_16(buf, tran->gray);
- png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
- }
-
- else if (color_type == PNG_COLOR_TYPE_RGB)
- {
- /* Three 16 bit values */
- png_save_uint_16(buf, tran->red);
- png_save_uint_16(buf + 2, tran->green);
- png_save_uint_16(buf + 4, tran->blue);
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
-#else
- if (buf[0] | buf[2] | buf[4])
-#endif
- {
- png_warning(png_ptr,
- "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8");
- return;
- }
-
- png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
- }
-
- else
- {
- png_warning(png_ptr, "Can't write tRNS with an alpha channel");
- }
-}
-#endif
-
-#ifdef PNG_WRITE_bKGD_SUPPORTED
-/* Write the background chunk */
-void /* PRIVATE */
-png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
-{
- PNG_bKGD;
- png_byte buf[6];
-
- png_debug(1, "in png_write_bKGD");
-
- if (color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- (png_ptr->num_palette ||
- (!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) &&
-#endif
- back->index >= png_ptr->num_palette)
- {
- png_warning(png_ptr, "Invalid background palette index");
- return;
- }
-
- buf[0] = back->index;
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
- }
-
- else if (color_type & PNG_COLOR_MASK_COLOR)
- {
- png_save_uint_16(buf, back->red);
- png_save_uint_16(buf + 2, back->green);
- png_save_uint_16(buf + 4, back->blue);
-#ifdef PNG_WRITE_16BIT_SUPPORTED
- if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
-#else
- if (buf[0] | buf[2] | buf[4])
-#endif
- {
- png_warning(png_ptr,
- "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8");
-
- return;
- }
-
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
- }
-
- else
- {
- if (back->gray >= (1 << png_ptr->bit_depth))
- {
- png_warning(png_ptr,
- "Ignoring attempt to write bKGD chunk out-of-range for bit_depth");
-
- return;
- }
-
- png_save_uint_16(buf, back->gray);
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
- }
-}
-#endif
-
-#ifdef PNG_WRITE_hIST_SUPPORTED
-/* Write the histogram */
-void /* PRIVATE */
-png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
-{
- PNG_hIST;
- int i;
- png_byte buf[3];
-
- png_debug(1, "in png_write_hIST");
-
- if (num_hist > (int)png_ptr->num_palette)
- {
- png_debug2(3, "num_hist = %d, num_palette = %d", num_hist,
- png_ptr->num_palette);
-
- png_warning(png_ptr, "Invalid number of histogram entries specified");
- return;
- }
-
- png_write_chunk_start(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
-
- for (i = 0; i < num_hist; i++)
- {
- png_save_uint_16(buf, hist[i]);
- png_write_chunk_data(png_ptr, buf, (png_size_t)2);
- }
-
- png_write_chunk_end(png_ptr);
-}
-#endif
-
-#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
- defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
-/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
- * and if invalid, correct the keyword rather than discarding the entire
- * chunk. The PNG 1.0 specification requires keywords 1-79 characters in
- * length, forbids leading or trailing whitespace, multiple internal spaces,
- * and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
- *
- * The new_key is allocated to hold the corrected keyword and must be freed
- * by the calling routine. This avoids problems with trying to write to
- * static keywords without having to have duplicate copies of the strings.
- */
-png_size_t /* PRIVATE */
-png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key)
-{
- png_size_t key_len;
- png_const_charp ikp;
- png_charp kp, dp;
- int kflag;
- int kwarn=0;
-
- png_debug(1, "in png_check_keyword");
-
- *new_key = NULL;
-
- if (key == NULL || (key_len = png_strlen(key)) == 0)
- {
- png_warning(png_ptr, "zero length keyword");
- return ((png_size_t)0);
- }
-
- png_debug1(2, "Keyword to be checked is '%s'", key);
-
- *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
-
- if (*new_key == NULL)
- {
- png_warning(png_ptr, "Out of memory while procesing keyword");
- return ((png_size_t)0);
- }
-
- /* Replace non-printing characters with a blank and print a warning */
- for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++)
- {
- if ((png_byte)*ikp < 0x20 ||
- ((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1))
- {
-#ifdef PNG_CONSOLE_IO_SUPPORTED
- char msg[40];
-
- png_snprintf(msg, 40,
- "invalid keyword character 0x%02X", (png_byte)*ikp);
- png_warning(png_ptr, msg);
-#else
- png_warning(png_ptr, "invalid character in keyword");
-#endif
- *dp = ' ';
- }
-
- else
- {
- *dp = *ikp;
- }
- }
- *dp = '\0';
-
- /* Remove any trailing white space. */
- kp = *new_key + key_len - 1;
- if (*kp == ' ')
- {
- png_warning(png_ptr, "trailing spaces removed from keyword");
-
- while (*kp == ' ')
- {
- *(kp--) = '\0';
- key_len--;
- }
- }
-
- /* Remove any leading white space. */
- kp = *new_key;
- if (*kp == ' ')
- {
- png_warning(png_ptr, "leading spaces removed from keyword");
-
- while (*kp == ' ')
- {
- kp++;
- key_len--;
- }
- }
-
- png_debug1(2, "Checking for multiple internal spaces in '%s'", kp);
-
- /* Remove multiple internal spaces. */
- for (kflag = 0, dp = *new_key; *kp != '\0'; kp++)
- {
- if (*kp == ' ' && kflag == 0)
- {
- *(dp++) = *kp;
- kflag = 1;
- }
-
- else if (*kp == ' ')
- {
- key_len--;
- kwarn = 1;
- }
-
- else
- {
- *(dp++) = *kp;
- kflag = 0;
- }
- }
- *dp = '\0';
- if (kwarn)
- png_warning(png_ptr, "extra interior spaces removed from keyword");
-
- if (key_len == 0)
- {
- png_free(png_ptr, *new_key);
- png_warning(png_ptr, "Zero length keyword");
- }
-
- if (key_len > 79)
- {
- png_warning(png_ptr, "keyword length must be 1 - 79 characters");
- (*new_key)[79] = '\0';
- key_len = 79;
- }
-
- return (key_len);
-}
-#endif
-
-#ifdef PNG_WRITE_tEXt_SUPPORTED
-/* Write a tEXt chunk */
-void /* PRIVATE */
-png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
- png_size_t text_len)
-{
- PNG_tEXt;
- png_size_t key_len;
- png_charp new_key;
-
- png_debug(1, "in png_write_tEXt");
-
- if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
- return;
-
- if (text == NULL || *text == '\0')
- text_len = 0;
-
- else
- text_len = png_strlen(text);
-
- /* Make sure we include the 0 after the key */
- png_write_chunk_start(png_ptr, png_tEXt,
- (png_uint_32)(key_len + text_len + 1));
- /*
- * We leave it to the application to meet PNG-1.0 requirements on the
- * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of
- * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
- * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
- */
- png_write_chunk_data(png_ptr, (png_bytep)new_key,
- (png_size_t)(key_len + 1));
-
- if (text_len)
- png_write_chunk_data(png_ptr, (png_const_bytep)text,
- (png_size_t)text_len);
-
- png_write_chunk_end(png_ptr);
- png_free(png_ptr, new_key);
-}
-#endif
-
-#ifdef PNG_WRITE_zTXt_SUPPORTED
-/* Write a compressed text chunk */
-void /* PRIVATE */
-png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
- png_size_t text_len, int compression)
-{
- PNG_zTXt;
- png_size_t key_len;
- png_byte buf;
- png_charp new_key;
- compression_state comp;
-
- png_debug(1, "in png_write_zTXt");
-
- comp.num_output_ptr = 0;
- comp.max_output_ptr = 0;
- comp.output_ptr = NULL;
- comp.input = NULL;
- comp.input_len = 0;
-
- if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0)
- {
- png_free(png_ptr, new_key);
- return;
- }
-
- if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE)
- {
- png_write_tEXt(png_ptr, new_key, text, (png_size_t)0);
- png_free(png_ptr, new_key);
- return;
- }
-
- text_len = png_strlen(text);
-
- /* Compute the compressed data; do it now for the length */
- text_len = png_text_compress(png_ptr, text, text_len, compression,
- &comp);
-
- /* Write start of chunk */
- png_write_chunk_start(png_ptr, png_zTXt,
- (png_uint_32)(key_len+text_len + 2));
-
- /* Write key */
- png_write_chunk_data(png_ptr, (png_bytep)new_key,
- (png_size_t)(key_len + 1));
-
- png_free(png_ptr, new_key);
-
- buf = (png_byte)compression;
-
- /* Write compression */
- png_write_chunk_data(png_ptr, &buf, (png_size_t)1);
-
- /* Write the compressed data */
- png_write_compressed_data_out(png_ptr, &comp);
-
- /* Close the chunk */
- png_write_chunk_end(png_ptr);
-}
-#endif
-
-#ifdef PNG_WRITE_iTXt_SUPPORTED
-/* Write an iTXt chunk */
-void /* PRIVATE */
-png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
- png_const_charp lang, png_const_charp lang_key, png_const_charp text)
-{
- PNG_iTXt;
- png_size_t lang_len, key_len, lang_key_len, text_len;
- png_charp new_lang;
- png_charp new_key = NULL;
- png_byte cbuf[2];
- compression_state comp;
-
- png_debug(1, "in png_write_iTXt");
-
- comp.num_output_ptr = 0;
- comp.max_output_ptr = 0;
- comp.output_ptr = NULL;
- comp.input = NULL;
-
- if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0)
- return;
-
- if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang)) == 0)
- {
- png_warning(png_ptr, "Empty language field in iTXt chunk");
- new_lang = NULL;
- lang_len = 0;
- }
-
- if (lang_key == NULL)
- lang_key_len = 0;
-
- else
- lang_key_len = png_strlen(lang_key);
-
- if (text == NULL)
- text_len = 0;
-
- else
- text_len = png_strlen(text);
-
- /* Compute the compressed data; do it now for the length */
- text_len = png_text_compress(png_ptr, text, text_len, compression - 2,
- &comp);
-
-
- /* Make sure we include the compression flag, the compression byte,
- * and the NULs after the key, lang, and lang_key parts
- */
-
- png_write_chunk_start(png_ptr, png_iTXt, (png_uint_32)(
- 5 /* comp byte, comp flag, terminators for key, lang and lang_key */
- + key_len
- + lang_len
- + lang_key_len
- + text_len));
-
- /* We leave it to the application to meet PNG-1.0 requirements on the
- * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of
- * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
- * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
- */
- png_write_chunk_data(png_ptr, (png_bytep)new_key, (png_size_t)(key_len + 1));
-
- /* Set the compression flag */
- if (compression == PNG_ITXT_COMPRESSION_NONE ||
- compression == PNG_TEXT_COMPRESSION_NONE)
- cbuf[0] = 0;
-
- else /* compression == PNG_ITXT_COMPRESSION_zTXt */
- cbuf[0] = 1;
-
- /* Set the compression method */
- cbuf[1] = 0;
-
- png_write_chunk_data(png_ptr, cbuf, (png_size_t)2);
-
- cbuf[0] = 0;
- png_write_chunk_data(png_ptr, (new_lang ? (png_const_bytep)new_lang : cbuf),
- (png_size_t)(lang_len + 1));
-
- png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf),
- (png_size_t)(lang_key_len + 1));
-
- png_write_compressed_data_out(png_ptr, &comp);
-
- png_write_chunk_end(png_ptr);
-
- png_free(png_ptr, new_key);
- png_free(png_ptr, new_lang);
-}
-#endif
-
-#ifdef PNG_WRITE_oFFs_SUPPORTED
-/* Write the oFFs chunk */
-void /* PRIVATE */
-png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
- int unit_type)
-{
- PNG_oFFs;
- png_byte buf[9];
-
- png_debug(1, "in png_write_oFFs");
-
- if (unit_type >= PNG_OFFSET_LAST)
- png_warning(png_ptr, "Unrecognized unit type for oFFs chunk");
-
- png_save_int_32(buf, x_offset);
- png_save_int_32(buf + 4, y_offset);
- buf[8] = (png_byte)unit_type;
-
- png_write_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
-}
-#endif
-#ifdef PNG_WRITE_pCAL_SUPPORTED
-/* Write the pCAL chunk (described in the PNG extensions document) */
-void /* PRIVATE */
-png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
- png_int_32 X1, int type, int nparams, png_const_charp units,
- png_charpp params)
-{
- PNG_pCAL;
- png_size_t purpose_len, units_len, total_len;
- png_uint_32p params_len;
- png_byte buf[10];
- png_charp new_purpose;
- int i;
-
- png_debug1(1, "in png_write_pCAL (%d parameters)", nparams);
-
- if (type >= PNG_EQUATION_LAST)
- png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
-
- purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1;
- png_debug1(3, "pCAL purpose length = %d", (int)purpose_len);
- units_len = png_strlen(units) + (nparams == 0 ? 0 : 1);
- png_debug1(3, "pCAL units length = %d", (int)units_len);
- total_len = purpose_len + units_len + 10;
-
- params_len = (png_uint_32p)png_malloc(png_ptr,
- (png_alloc_size_t)(nparams * png_sizeof(png_uint_32)));
-
- /* Find the length of each parameter, making sure we don't count the
- * null terminator for the last parameter.
- */
- for (i = 0; i < nparams; i++)
- {
- params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1);
- png_debug2(3, "pCAL parameter %d length = %lu", i,
- (unsigned long)params_len[i]);
- total_len += (png_size_t)params_len[i];
- }
-
- png_debug1(3, "pCAL total length = %d", (int)total_len);
- png_write_chunk_start(png_ptr, png_pCAL, (png_uint_32)total_len);
- png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose,
- (png_size_t)purpose_len);
- png_save_int_32(buf, X0);
- png_save_int_32(buf + 4, X1);
- buf[8] = (png_byte)type;
- buf[9] = (png_byte)nparams;
- png_write_chunk_data(png_ptr, buf, (png_size_t)10);
- png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len);
-
- png_free(png_ptr, new_purpose);
-
- for (i = 0; i < nparams; i++)
- {
- png_write_chunk_data(png_ptr, (png_const_bytep)params[i],
- (png_size_t)params_len[i]);
- }
-
- png_free(png_ptr, params_len);
- png_write_chunk_end(png_ptr);
-}
-#endif
-
-#ifdef PNG_WRITE_sCAL_SUPPORTED
-/* Write the sCAL chunk */
-void /* PRIVATE */
-png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width,
- png_const_charp height)
-{
- PNG_sCAL;
- png_byte buf[64];
- png_size_t wlen, hlen, total_len;
-
- png_debug(1, "in png_write_sCAL_s");
-
- wlen = png_strlen(width);
- hlen = png_strlen(height);
- total_len = wlen + hlen + 2;
-
- if (total_len > 64)
- {
- png_warning(png_ptr, "Can't write sCAL (buffer too small)");
- return;
- }
-
- buf[0] = (png_byte)unit;
- png_memcpy(buf + 1, width, wlen + 1); /* Append the '\0' here */
- png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */
-
- png_debug1(3, "sCAL total length = %u", (unsigned int)total_len);
- png_write_chunk(png_ptr, png_sCAL, buf, total_len);
-}
-#endif
-
-#ifdef PNG_WRITE_pHYs_SUPPORTED
-/* Write the pHYs chunk */
-void /* PRIVATE */
-png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
- png_uint_32 y_pixels_per_unit,
- int unit_type)
-{
- PNG_pHYs;
- png_byte buf[9];
-
- png_debug(1, "in png_write_pHYs");
-
- if (unit_type >= PNG_RESOLUTION_LAST)
- png_warning(png_ptr, "Unrecognized unit type for pHYs chunk");
-
- png_save_uint_32(buf, x_pixels_per_unit);
- png_save_uint_32(buf + 4, y_pixels_per_unit);
- buf[8] = (png_byte)unit_type;
-
- png_write_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
-}
-#endif
-
-#ifdef PNG_WRITE_tIME_SUPPORTED
-/* Write the tIME chunk. Use either png_convert_from_struct_tm()
- * or png_convert_from_time_t(), or fill in the structure yourself.
- */
-void /* PRIVATE */
-png_write_tIME(png_structp png_ptr, png_const_timep mod_time)
-{
- PNG_tIME;
- png_byte buf[7];
-
- png_debug(1, "in png_write_tIME");
-
- if (mod_time->month > 12 || mod_time->month < 1 ||
- mod_time->day > 31 || mod_time->day < 1 ||
- mod_time->hour > 23 || mod_time->second > 60)
- {
- png_warning(png_ptr, "Invalid time specified for tIME chunk");
- return;
- }
-
- png_save_uint_16(buf, mod_time->year);
- buf[2] = mod_time->month;
- buf[3] = mod_time->day;
- buf[4] = mod_time->hour;
- buf[5] = mod_time->minute;
- buf[6] = mod_time->second;
-
- png_write_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
-}
-#endif
-
-/* Initializes the row writing capability of libpng */
-void /* PRIVATE */
-png_write_start_row(png_structp png_ptr)
-{
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-
- /* Start of interlace block */
- int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
-
- /* Offset to next interlace block */
- int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
-
- /* Start of interlace block in the y direction */
- int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
-
- /* Offset to next interlace block in the y direction */
- int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
-#endif
-
- png_size_t buf_size;
-
- png_debug(1, "in png_write_start_row");
-
- buf_size = (png_size_t)(PNG_ROWBYTES(
- png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
-
- /* Set up row buffer */
- png_ptr->row_buf = (png_bytep)png_malloc(png_ptr,
- (png_alloc_size_t)buf_size);
-
- png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
-
-#ifdef PNG_WRITE_FILTER_SUPPORTED
- /* Set up filtering buffer, if using this filter */
- if (png_ptr->do_filter & PNG_FILTER_SUB)
- {
- png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1);
-
- png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
- }
-
- /* We only need to keep the previous row if we are using one of these. */
- if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
- {
- /* Set up previous row buffer */
- png_ptr->prev_row = (png_bytep)png_calloc(png_ptr,
- (png_alloc_size_t)buf_size);
-
- if (png_ptr->do_filter & PNG_FILTER_UP)
- {
- png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
- png_ptr->rowbytes + 1);
-
- png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
- }
-
- if (png_ptr->do_filter & PNG_FILTER_AVG)
- {
- png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
- png_ptr->rowbytes + 1);
-
- png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
- }
-
- if (png_ptr->do_filter & PNG_FILTER_PAETH)
- {
- png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
- png_ptr->rowbytes + 1);
-
- png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
- }
- }
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
-
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* If interlaced, we need to set up width and height of pass */
- if (png_ptr->interlaced)
- {
- if (!(png_ptr->transformations & PNG_INTERLACE))
- {
- png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
- png_pass_ystart[0]) / png_pass_yinc[0];
-
- png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 -
- png_pass_start[0]) / png_pass_inc[0];
- }
-
- else
- {
- png_ptr->num_rows = png_ptr->height;
- png_ptr->usr_width = png_ptr->width;
- }
- }
-
- else
-#endif
- {
- png_ptr->num_rows = png_ptr->height;
- png_ptr->usr_width = png_ptr->width;
- }
-
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_out = png_ptr->zbuf;
-}
-
-/* Internal use only. Called when finished processing a row of data. */
-void /* PRIVATE */
-png_write_finish_row(png_structp png_ptr)
-{
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-
- /* Start of interlace block */
- int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
-
- /* Offset to next interlace block */
- int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
-
- /* Start of interlace block in the y direction */
- int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
-
- /* Offset to next interlace block in the y direction */
- int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
-#endif
-
- int ret;
-
- png_debug(1, "in png_write_finish_row");
-
- /* Next row */
- png_ptr->row_number++;
-
- /* See if we are done */
- if (png_ptr->row_number < png_ptr->num_rows)
- return;
-
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* If interlaced, go to next pass */
- if (png_ptr->interlaced)
- {
- png_ptr->row_number = 0;
- if (png_ptr->transformations & PNG_INTERLACE)
- {
- png_ptr->pass++;
- }
-
- else
- {
- /* Loop until we find a non-zero width or height pass */
- do
- {
- png_ptr->pass++;
-
- if (png_ptr->pass >= 7)
- break;
-
- png_ptr->usr_width = (png_ptr->width +
- png_pass_inc[png_ptr->pass] - 1 -
- png_pass_start[png_ptr->pass]) /
- png_pass_inc[png_ptr->pass];
-
- png_ptr->num_rows = (png_ptr->height +
- png_pass_yinc[png_ptr->pass] - 1 -
- png_pass_ystart[png_ptr->pass]) /
- png_pass_yinc[png_ptr->pass];
-
- if (png_ptr->transformations & PNG_INTERLACE)
- break;
-
- } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0);
-
- }
-
- /* Reset the row above the image for the next pass */
- if (png_ptr->pass < 7)
- {
- if (png_ptr->prev_row != NULL)
- png_memset(png_ptr->prev_row, 0,
- (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels*
- png_ptr->usr_bit_depth, png_ptr->width)) + 1);
-
- return;
- }
- }
-#endif
-
- /* If we get here, we've just written the last row, so we need
- to flush the compressor */
- do
- {
- /* Tell the compressor we are done */
- ret = deflate(&png_ptr->zstream, Z_FINISH);
-
- /* Check for an error */
- if (ret == Z_OK)
- {
- /* Check to see if we need more room */
- if (!(png_ptr->zstream.avail_out))
- {
- png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- }
- }
-
- else if (ret != Z_STREAM_END)
- {
- if (png_ptr->zstream.msg != NULL)
- png_error(png_ptr, png_ptr->zstream.msg);
-
- else
- png_error(png_ptr, "zlib error");
- }
- } while (ret != Z_STREAM_END);
-
- /* Write any extra space */
- if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
- {
- png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size -
- png_ptr->zstream.avail_out);
- }
-
- deflateReset(&png_ptr->zstream);
- png_ptr->zstream.data_type = Z_BINARY;
-}
-
-#ifdef PNG_WRITE_INTERLACING_SUPPORTED
-/* Pick out the correct pixels for the interlace pass.
- * The basic idea here is to go through the row with a source
- * pointer and a destination pointer (sp and dp), and copy the
- * correct pixels for the pass. As the row gets compacted,
- * sp will always be >= dp, so we should never overwrite anything.
- * See the default: case for the easiest code to understand.
- */
-void /* PRIVATE */
-png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
-{
- /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-
- /* Start of interlace block */
- int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
-
- /* Offset to next interlace block */
- int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
-
- png_debug(1, "in png_do_write_interlace");
-
- /* We don't have to do anything on the last pass (6) */
- if (pass < 6)
- {
- /* Each pixel depth is handled separately */
- switch (row_info->pixel_depth)
- {
- case 1:
- {
- png_bytep sp;
- png_bytep dp;
- int shift;
- int d;
- int value;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- dp = row;
- d = 0;
- shift = 7;
-
- for (i = png_pass_start[pass]; i < row_width;
- i += png_pass_inc[pass])
- {
- sp = row + (png_size_t)(i >> 3);
- value = (int)(*sp >> (7 - (int)(i & 0x07))) & 0x01;
- d |= (value << shift);
-
- if (shift == 0)
- {
- shift = 7;
- *dp++ = (png_byte)d;
- d = 0;
- }
-
- else
- shift--;
-
- }
- if (shift != 7)
- *dp = (png_byte)d;
-
- break;
- }
-
- case 2:
- {
- png_bytep sp;
- png_bytep dp;
- int shift;
- int d;
- int value;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- dp = row;
- shift = 6;
- d = 0;
-
- for (i = png_pass_start[pass]; i < row_width;
- i += png_pass_inc[pass])
- {
- sp = row + (png_size_t)(i >> 2);
- value = (*sp >> ((3 - (int)(i & 0x03)) << 1)) & 0x03;
- d |= (value << shift);
-
- if (shift == 0)
- {
- shift = 6;
- *dp++ = (png_byte)d;
- d = 0;
- }
-
- else
- shift -= 2;
- }
- if (shift != 6)
- *dp = (png_byte)d;
-
- break;
- }
-
- case 4:
- {
- png_bytep sp;
- png_bytep dp;
- int shift;
- int d;
- int value;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
-
- dp = row;
- shift = 4;
- d = 0;
- for (i = png_pass_start[pass]; i < row_width;
- i += png_pass_inc[pass])
- {
- sp = row + (png_size_t)(i >> 1);
- value = (*sp >> ((1 - (int)(i & 0x01)) << 2)) & 0x0f;
- d |= (value << shift);
-
- if (shift == 0)
- {
- shift = 4;
- *dp++ = (png_byte)d;
- d = 0;
- }
-
- else
- shift -= 4;
- }
- if (shift != 4)
- *dp = (png_byte)d;
-
- break;
- }
-
- default:
- {
- png_bytep sp;
- png_bytep dp;
- png_uint_32 i;
- png_uint_32 row_width = row_info->width;
- png_size_t pixel_bytes;
-
- /* Start at the beginning */
- dp = row;
-
- /* Find out how many bytes each pixel takes up */
- pixel_bytes = (row_info->pixel_depth >> 3);
-
- /* Loop through the row, only looking at the pixels that matter */
- for (i = png_pass_start[pass]; i < row_width;
- i += png_pass_inc[pass])
- {
- /* Find out where the original pixel is */
- sp = row + (png_size_t)i * pixel_bytes;
-
- /* Move the pixel */
- if (dp != sp)
- png_memcpy(dp, sp, pixel_bytes);
-
- /* Next pixel */
- dp += pixel_bytes;
- }
- break;
- }
- }
- /* Set new row width */
- row_info->width = (row_info->width +
- png_pass_inc[pass] - 1 -
- png_pass_start[pass]) /
- png_pass_inc[pass];
-
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
- row_info->width);
- }
-}
-#endif
-
-/* This filters the row, chooses which filter to use, if it has not already
- * been specified by the application, and then writes the row out with the
- * chosen filter.
- */
-#define PNG_MAXSUM (((png_uint_32)(-1)) >> 1)
-#define PNG_HISHIFT 10
-#define PNG_LOMASK ((png_uint_32)0xffffL)
-#define PNG_HIMASK ((png_uint_32)(~PNG_LOMASK >> PNG_HISHIFT))
-void /* PRIVATE */
-png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
-{
- png_bytep best_row;
-#ifdef PNG_WRITE_FILTER_SUPPORTED
- png_bytep prev_row, row_buf;
- png_uint_32 mins, bpp;
- png_byte filter_to_do = png_ptr->do_filter;
- png_size_t row_bytes = row_info->rowbytes;
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- int num_p_filters = (int)png_ptr->num_prev_filters;
-#endif
-
- png_debug(1, "in png_write_find_filter");
-
-#ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS)
- {
- /* These will never be selected so we need not test them. */
- filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH);
- }
-#endif
-
- /* Find out how many bytes offset each pixel is */
- bpp = (row_info->pixel_depth + 7) >> 3;
-
- prev_row = png_ptr->prev_row;
-#endif
- best_row = png_ptr->row_buf;
-#ifdef PNG_WRITE_FILTER_SUPPORTED
- row_buf = best_row;
- mins = PNG_MAXSUM;
-
- /* The prediction method we use is to find which method provides the
- * smallest value when summing the absolute values of the distances
- * from zero, using anything >= 128 as negative numbers. This is known
- * as the "minimum sum of absolute differences" heuristic. Other
- * heuristics are the "weighted minimum sum of absolute differences"
- * (experimental and can in theory improve compression), and the "zlib
- * predictive" method (not implemented yet), which does test compressions
- * of lines using different filter methods, and then chooses the
- * (series of) filter(s) that give minimum compressed data size (VERY
- * computationally expensive).
- *
- * GRR 980525: consider also
- *
- * (1) minimum sum of absolute differences from running average (i.e.,
- * keep running sum of non-absolute differences & count of bytes)
- * [track dispersion, too? restart average if dispersion too large?]
- *
- * (1b) minimum sum of absolute differences from sliding average, probably
- * with window size <= deflate window (usually 32K)
- *
- * (2) minimum sum of squared differences from zero or running average
- * (i.e., ~ root-mean-square approach)
- */
-
-
- /* We don't need to test the 'no filter' case if this is the only filter
- * that has been chosen, as it doesn't actually do anything to the data.
- */
- if ((filter_to_do & PNG_FILTER_NONE) && filter_to_do != PNG_FILTER_NONE)
- {
- png_bytep rp;
- png_uint_32 sum = 0;
- png_size_t i;
- int v;
-
- for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++)
- {
- v = *rp;
- sum += (v < 128) ? v : 256 - v;
- }
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- png_uint_32 sumhi, sumlo;
- int j;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; /* Gives us some footroom */
-
- /* Reduce the sum if we match any of the previous rows */
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
- {
- sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- /* Factor in the cost of this filter (this is here for completeness,
- * but it makes no sense to have a "cost" for the NONE filter, as
- * it has the minimum possible computational cost - none).
- */
- sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
- mins = sum;
- }
-
- /* Sub filter */
- if (filter_to_do == PNG_FILTER_SUB)
- /* It's the only filter so no testing is needed */
- {
- png_bytep rp, lp, dp;
- png_size_t i;
-
- for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
- i++, rp++, dp++)
- {
- *dp = *rp;
- }
-
- for (lp = row_buf + 1; i < row_bytes;
- i++, rp++, lp++, dp++)
- {
- *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff);
- }
-
- best_row = png_ptr->sub_row;
- }
-
- else if (filter_to_do & PNG_FILTER_SUB)
- {
- png_bytep rp, dp, lp;
- png_uint_32 sum = 0, lmins = mins;
- png_size_t i;
- int v;
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- /* We temporarily increase the "minimum sum" by the factor we
- * would reduce the sum of this filter, so that we can do the
- * early exit comparison without scaling the sum each time.
- */
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 lmhi, lmlo;
- lmlo = lmins & PNG_LOMASK;
- lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
- {
- lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
-
- if (lmhi > PNG_HIMASK)
- lmins = PNG_MAXSUM;
-
- else
- lmins = (lmhi << PNG_HISHIFT) + lmlo;
- }
-#endif
-
- for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
- i++, rp++, dp++)
- {
- v = *dp = *rp;
-
- sum += (v < 128) ? v : 256 - v;
- }
-
- for (lp = row_buf + 1; i < row_bytes;
- i++, rp++, lp++, dp++)
- {
- v = *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff);
-
- sum += (v < 128) ? v : 256 - v;
-
- if (sum > lmins) /* We are already worse, don't continue. */
- break;
- }
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 sumhi, sumlo;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
- {
- sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
-
- if (sum < mins)
- {
- mins = sum;
- best_row = png_ptr->sub_row;
- }
- }
-
- /* Up filter */
- if (filter_to_do == PNG_FILTER_UP)
- {
- png_bytep rp, dp, pp;
- png_size_t i;
-
- for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
- pp = prev_row + 1; i < row_bytes;
- i++, rp++, pp++, dp++)
- {
- *dp = (png_byte)(((int)*rp - (int)*pp) & 0xff);
- }
-
- best_row = png_ptr->up_row;
- }
-
- else if (filter_to_do & PNG_FILTER_UP)
- {
- png_bytep rp, dp, pp;
- png_uint_32 sum = 0, lmins = mins;
- png_size_t i;
- int v;
-
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 lmhi, lmlo;
- lmlo = lmins & PNG_LOMASK;
- lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
- {
- lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
-
- if (lmhi > PNG_HIMASK)
- lmins = PNG_MAXSUM;
-
- else
- lmins = (lmhi << PNG_HISHIFT) + lmlo;
- }
-#endif
-
- for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
- pp = prev_row + 1; i < row_bytes; i++)
- {
- v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
-
- sum += (v < 128) ? v : 256 - v;
-
- if (sum > lmins) /* We are already worse, don't continue. */
- break;
- }
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 sumhi, sumlo;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
- {
- sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
-
- if (sum < mins)
- {
- mins = sum;
- best_row = png_ptr->up_row;
- }
- }
-
- /* Avg filter */
- if (filter_to_do == PNG_FILTER_AVG)
- {
- png_bytep rp, dp, pp, lp;
- png_uint_32 i;
-
- for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
- pp = prev_row + 1; i < bpp; i++)
- {
- *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff);
- }
-
- for (lp = row_buf + 1; i < row_bytes; i++)
- {
- *dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2))
- & 0xff);
- }
- best_row = png_ptr->avg_row;
- }
-
- else if (filter_to_do & PNG_FILTER_AVG)
- {
- png_bytep rp, dp, pp, lp;
- png_uint_32 sum = 0, lmins = mins;
- png_size_t i;
- int v;
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 lmhi, lmlo;
- lmlo = lmins & PNG_LOMASK;
- lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG)
- {
- lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
-
- if (lmhi > PNG_HIMASK)
- lmins = PNG_MAXSUM;
-
- else
- lmins = (lmhi << PNG_HISHIFT) + lmlo;
- }
-#endif
-
- for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
- pp = prev_row + 1; i < bpp; i++)
- {
- v = *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff);
-
- sum += (v < 128) ? v : 256 - v;
- }
-
- for (lp = row_buf + 1; i < row_bytes; i++)
- {
- v = *dp++ =
- (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff);
-
- sum += (v < 128) ? v : 256 - v;
-
- if (sum > lmins) /* We are already worse, don't continue. */
- break;
- }
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 sumhi, sumlo;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
- {
- sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
-
- if (sum < mins)
- {
- mins = sum;
- best_row = png_ptr->avg_row;
- }
- }
-
- /* Paeth filter */
- if (filter_to_do == PNG_FILTER_PAETH)
- {
- png_bytep rp, dp, pp, cp, lp;
- png_size_t i;
-
- for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
- pp = prev_row + 1; i < bpp; i++)
- {
- *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
- }
-
- for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++)
- {
- int a, b, c, pa, pb, pc, p;
-
- b = *pp++;
- c = *cp++;
- a = *lp++;
-
- p = b - c;
- pc = a - c;
-
-#ifdef PNG_USE_ABS
- pa = abs(p);
- pb = abs(pc);
- pc = abs(p + pc);
-#else
- pa = p < 0 ? -p : p;
- pb = pc < 0 ? -pc : pc;
- pc = (p + pc) < 0 ? -(p + pc) : p + pc;
-#endif
-
- p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c;
-
- *dp++ = (png_byte)(((int)*rp++ - p) & 0xff);
- }
- best_row = png_ptr->paeth_row;
- }
-
- else if (filter_to_do & PNG_FILTER_PAETH)
- {
- png_bytep rp, dp, pp, cp, lp;
- png_uint_32 sum = 0, lmins = mins;
- png_size_t i;
- int v;
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 lmhi, lmlo;
- lmlo = lmins & PNG_LOMASK;
- lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
- {
- lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
-
- if (lmhi > PNG_HIMASK)
- lmins = PNG_MAXSUM;
-
- else
- lmins = (lmhi << PNG_HISHIFT) + lmlo;
- }
-#endif
-
- for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
- pp = prev_row + 1; i < bpp; i++)
- {
- v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
-
- sum += (v < 128) ? v : 256 - v;
- }
-
- for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++)
- {
- int a, b, c, pa, pb, pc, p;
-
- b = *pp++;
- c = *cp++;
- a = *lp++;
-
-#ifndef PNG_SLOW_PAETH
- p = b - c;
- pc = a - c;
-#ifdef PNG_USE_ABS
- pa = abs(p);
- pb = abs(pc);
- pc = abs(p + pc);
-#else
- pa = p < 0 ? -p : p;
- pb = pc < 0 ? -pc : pc;
- pc = (p + pc) < 0 ? -(p + pc) : p + pc;
-#endif
- p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c;
-#else /* PNG_SLOW_PAETH */
- p = a + b - c;
- pa = abs(p - a);
- pb = abs(p - b);
- pc = abs(p - c);
-
- if (pa <= pb && pa <= pc)
- p = a;
-
- else if (pb <= pc)
- p = b;
-
- else
- p = c;
-#endif /* PNG_SLOW_PAETH */
-
- v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff);
-
- sum += (v < 128) ? v : 256 - v;
-
- if (sum > lmins) /* We are already worse, don't continue. */
- break;
- }
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 sumhi, sumlo;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
- {
- sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
-
- if (sum < mins)
- {
- best_row = png_ptr->paeth_row;
- }
- }
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
- /* Do the actual writing of the filtered row data from the chosen filter. */
-
- png_write_filtered_row(png_ptr, best_row);
-
-#ifdef PNG_WRITE_FILTER_SUPPORTED
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- /* Save the type of filter we picked this time for future calculations */
- if (png_ptr->num_prev_filters > 0)
- {
- int j;
-
- for (j = 1; j < num_p_filters; j++)
- {
- png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1];
- }
-
- png_ptr->prev_filters[j] = best_row[0];
- }
-#endif
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
-}
-
-
-/* Do the actual writing of a previously filtered row. */
-void /* PRIVATE */
-png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
-{
- png_size_t avail;
-
- png_debug(1, "in png_write_filtered_row");
-
- png_debug1(2, "filter = %d", filtered_row[0]);
- /* Set up the zlib input buffer */
-
- png_ptr->zstream.next_in = filtered_row;
- png_ptr->zstream.avail_in = 0;
- avail = png_ptr->row_info.rowbytes + 1;
- /* Repeat until we have compressed all the data */
- do
- {
- int ret; /* Return of zlib */
-
- /* Record the number of bytes available - zlib supports at least 65535
- * bytes at one step, depending on the size of the zlib type 'uInt', the
- * maximum size zlib can write at once is ZLIB_IO_MAX (from pngpriv.h).
- * Use this because on 16 bit systems 'rowbytes' can be up to 65536 (i.e.
- * one more than 16 bits) and, in this case 'rowbytes+1' can overflow a
- * uInt. ZLIB_IO_MAX can be safely reduced to cause zlib to be called
- * with smaller chunks of data.
- */
- if (png_ptr->zstream.avail_in == 0)
- {
- if (avail > ZLIB_IO_MAX)
- {
- png_ptr->zstream.avail_in = ZLIB_IO_MAX;
- avail -= ZLIB_IO_MAX;
- }
-
- else
- {
- /* So this will fit in the available uInt space: */
- png_ptr->zstream.avail_in = (uInt)avail;
- avail = 0;
- }
- }
-
- /* Compress the data */
- ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
-
- /* Check for compression errors */
- if (ret != Z_OK)
- {
- if (png_ptr->zstream.msg != NULL)
- png_error(png_ptr, png_ptr->zstream.msg);
-
- else
- png_error(png_ptr, "zlib error");
- }
-
- /* See if it is time to write another IDAT */
- if (!(png_ptr->zstream.avail_out))
- {
- /* Write the IDAT and reset the zlib output buffer */
- png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- }
- /* Repeat until all data has been compressed */
- } while (avail > 0 || png_ptr->zstream.avail_in > 0);
-
- /* Swap the current and previous rows */
- if (png_ptr->prev_row != NULL)
- {
- png_bytep tptr;
-
- tptr = png_ptr->prev_row;
- png_ptr->prev_row = png_ptr->row_buf;
- png_ptr->row_buf = tptr;
- }
-
- /* Finish row - updates counters and flushes zlib if last row */
- png_write_finish_row(png_ptr);
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
- png_ptr->flush_rows++;
-
- if (png_ptr->flush_dist > 0 &&
- png_ptr->flush_rows >= png_ptr->flush_dist)
- {
- png_write_flush(png_ptr);
- }
-#endif
-}
-#endif /* PNG_WRITE_SUPPORTED */
+++ /dev/null
-// ISO C9x compliant inttypes.h for Microsoft Visual Studio
-// Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124
-//
-// Copyright (c) 2006 Alexander Chemeris
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-//
-// 1. Redistributions of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.
-//
-// 2. Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// 3. The name of the author may be used to endorse or promote products
-// derived from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
-// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
-// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#ifndef _MSC_VER // [
-#error "Use this header only with Microsoft Visual C++ compilers!"
-#endif // _MSC_VER ]
-
-#ifndef _MSC_INTTYPES_H_ // [
-#define _MSC_INTTYPES_H_
-
-#if _MSC_VER > 1000
-#pragma once
-#endif
-
-#include "stdint.h"
-
-// 7.8 Format conversion of integer types
-
-typedef struct {
- intmax_t quot;
- intmax_t rem;
-} imaxdiv_t;
-
-// 7.8.1 Macros for format specifiers
-
-#if !defined(__cplusplus) || defined(__STDC_FORMAT_MACROS) // [ See footnote 185 at page 198
-
-// The fprintf macros for signed integers are:
-#define PRId8 "d"
-#define PRIi8 "i"
-#define PRIdLEAST8 "d"
-#define PRIiLEAST8 "i"
-#define PRIdFAST8 "d"
-#define PRIiFAST8 "i"
-
-#define PRId16 "hd"
-#define PRIi16 "hi"
-#define PRIdLEAST16 "hd"
-#define PRIiLEAST16 "hi"
-#define PRIdFAST16 "hd"
-#define PRIiFAST16 "hi"
-
-#define PRId32 "I32d"
-#define PRIi32 "I32i"
-#define PRIdLEAST32 "I32d"
-#define PRIiLEAST32 "I32i"
-#define PRIdFAST32 "I32d"
-#define PRIiFAST32 "I32i"
-
-#define PRId64 "I64d"
-#define PRIi64 "I64i"
-#define PRIdLEAST64 "I64d"
-#define PRIiLEAST64 "I64i"
-#define PRIdFAST64 "I64d"
-#define PRIiFAST64 "I64i"
-
-#define PRIdMAX "I64d"
-#define PRIiMAX "I64i"
-
-#define PRIdPTR "Id"
-#define PRIiPTR "Ii"
-
-// The fprintf macros for unsigned integers are:
-#define PRIo8 "o"
-#define PRIu8 "u"
-#define PRIx8 "x"
-#define PRIX8 "X"
-#define PRIoLEAST8 "o"
-#define PRIuLEAST8 "u"
-#define PRIxLEAST8 "x"
-#define PRIXLEAST8 "X"
-#define PRIoFAST8 "o"
-#define PRIuFAST8 "u"
-#define PRIxFAST8 "x"
-#define PRIXFAST8 "X"
-
-#define PRIo16 "ho"
-#define PRIu16 "hu"
-#define PRIx16 "hx"
-#define PRIX16 "hX"
-#define PRIoLEAST16 "ho"
-#define PRIuLEAST16 "hu"
-#define PRIxLEAST16 "hx"
-#define PRIXLEAST16 "hX"
-#define PRIoFAST16 "ho"
-#define PRIuFAST16 "hu"
-#define PRIxFAST16 "hx"
-#define PRIXFAST16 "hX"
-
-#define PRIo32 "I32o"
-#define PRIu32 "I32u"
-#define PRIx32 "I32x"
-#define PRIX32 "I32X"
-#define PRIoLEAST32 "I32o"
-#define PRIuLEAST32 "I32u"
-#define PRIxLEAST32 "I32x"
-#define PRIXLEAST32 "I32X"
-#define PRIoFAST32 "I32o"
-#define PRIuFAST32 "I32u"
-#define PRIxFAST32 "I32x"
-#define PRIXFAST32 "I32X"
-
-#define PRIo64 "I64o"
-#define PRIu64 "I64u"
-#define PRIx64 "I64x"
-#define PRIX64 "I64X"
-#define PRIoLEAST64 "I64o"
-#define PRIuLEAST64 "I64u"
-#define PRIxLEAST64 "I64x"
-#define PRIXLEAST64 "I64X"
-#define PRIoFAST64 "I64o"
-#define PRIuFAST64 "I64u"
-#define PRIxFAST64 "I64x"
-#define PRIXFAST64 "I64X"
-
-#define PRIoMAX "I64o"
-#define PRIuMAX "I64u"
-#define PRIxMAX "I64x"
-#define PRIXMAX "I64X"
-
-#define PRIoPTR "Io"
-#define PRIuPTR "Iu"
-#define PRIxPTR "Ix"
-#define PRIXPTR "IX"
-
-// The fscanf macros for signed integers are:
-#define SCNd8 "d"
-#define SCNi8 "i"
-#define SCNdLEAST8 "d"
-#define SCNiLEAST8 "i"
-#define SCNdFAST8 "d"
-#define SCNiFAST8 "i"
-
-#define SCNd16 "hd"
-#define SCNi16 "hi"
-#define SCNdLEAST16 "hd"
-#define SCNiLEAST16 "hi"
-#define SCNdFAST16 "hd"
-#define SCNiFAST16 "hi"
-
-#define SCNd32 "ld"
-#define SCNi32 "li"
-#define SCNdLEAST32 "ld"
-#define SCNiLEAST32 "li"
-#define SCNdFAST32 "ld"
-#define SCNiFAST32 "li"
-
-#define SCNd64 "I64d"
-#define SCNi64 "I64i"
-#define SCNdLEAST64 "I64d"
-#define SCNiLEAST64 "I64i"
-#define SCNdFAST64 "I64d"
-#define SCNiFAST64 "I64i"
-
-#define SCNdMAX "I64d"
-#define SCNiMAX "I64i"
-
-#ifdef _WIN64 // [
-# define SCNdPTR "I64d"
-# define SCNiPTR "I64i"
-#else // _WIN64 ][
-# define SCNdPTR "ld"
-# define SCNiPTR "li"
-#endif // _WIN64 ]
-
-// The fscanf macros for unsigned integers are:
-#define SCNo8 "o"
-#define SCNu8 "u"
-#define SCNx8 "x"
-#define SCNX8 "X"
-#define SCNoLEAST8 "o"
-#define SCNuLEAST8 "u"
-#define SCNxLEAST8 "x"
-#define SCNXLEAST8 "X"
-#define SCNoFAST8 "o"
-#define SCNuFAST8 "u"
-#define SCNxFAST8 "x"
-#define SCNXFAST8 "X"
-
-#define SCNo16 "ho"
-#define SCNu16 "hu"
-#define SCNx16 "hx"
-#define SCNX16 "hX"
-#define SCNoLEAST16 "ho"
-#define SCNuLEAST16 "hu"
-#define SCNxLEAST16 "hx"
-#define SCNXLEAST16 "hX"
-#define SCNoFAST16 "ho"
-#define SCNuFAST16 "hu"
-#define SCNxFAST16 "hx"
-#define SCNXFAST16 "hX"
-
-#define SCNo32 "lo"
-#define SCNu32 "lu"
-#define SCNx32 "lx"
-#define SCNX32 "lX"
-#define SCNoLEAST32 "lo"
-#define SCNuLEAST32 "lu"
-#define SCNxLEAST32 "lx"
-#define SCNXLEAST32 "lX"
-#define SCNoFAST32 "lo"
-#define SCNuFAST32 "lu"
-#define SCNxFAST32 "lx"
-#define SCNXFAST32 "lX"
-
-#define SCNo64 "I64o"
-#define SCNu64 "I64u"
-#define SCNx64 "I64x"
-#define SCNX64 "I64X"
-#define SCNoLEAST64 "I64o"
-#define SCNuLEAST64 "I64u"
-#define SCNxLEAST64 "I64x"
-#define SCNXLEAST64 "I64X"
-#define SCNoFAST64 "I64o"
-#define SCNuFAST64 "I64u"
-#define SCNxFAST64 "I64x"
-#define SCNXFAST64 "I64X"
-
-#define SCNoMAX "I64o"
-#define SCNuMAX "I64u"
-#define SCNxMAX "I64x"
-#define SCNXMAX "I64X"
-
-#ifdef _WIN64 // [
-# define SCNoPTR "I64o"
-# define SCNuPTR "I64u"
-# define SCNxPTR "I64x"
-# define SCNXPTR "I64X"
-#else // _WIN64 ][
-# define SCNoPTR "lo"
-# define SCNuPTR "lu"
-# define SCNxPTR "lx"
-# define SCNXPTR "lX"
-#endif // _WIN64 ]
-
-#endif // __STDC_FORMAT_MACROS ]
-
-// 7.8.2 Functions for greatest-width integer types
-
-// 7.8.2.1 The imaxabs function
-#define imaxabs _abs64
-
-// 7.8.2.2 The imaxdiv function
-
-// This is modified version of div() function from Microsoft's div.c found
-// in %MSVC.NET%\crt\src\div.c
-#ifdef STATIC_IMAXDIV // [
-static
-#else // STATIC_IMAXDIV ][
-_inline
-#endif // STATIC_IMAXDIV ]
-imaxdiv_t __cdecl imaxdiv(intmax_t numer, intmax_t denom)
-{
- imaxdiv_t result;
-
- result.quot = numer / denom;
- result.rem = numer % denom;
-
- if (numer < 0 && result.rem > 0) {
- // did division wrong; must fix up
- ++result.quot;
- result.rem -= denom;
- }
-
- return result;
-}
-
-// 7.8.2.3 The strtoimax and strtoumax functions
-#define strtoimax _strtoi64
-#define strtoumax _strtoui64
-
-// 7.8.2.4 The wcstoimax and wcstoumax functions
-#define wcstoimax _wcstoi64
-#define wcstoumax _wcstoui64
-
-
-#endif // _MSC_INTTYPES_H_ ]
+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2007-2010 VMware, Inc.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- **************************************************************************/
-
-#ifndef _STDBOOL_H_
-#define _STDBOOL_H_
-
-#ifndef __cplusplus
-
-#define false 0
-#define true 1
-#define bool _Bool
-
-/* For compilers that don't have the builtin _Bool type. */
-#if defined(_MSC_VER) || (__STDC_VERSION__ < 199901L && __GNUC__ < 3)
-typedef unsigned char _Bool;
-#endif
-
-#endif /* !__cplusplus */
-
-#define __bool_true_false_are_defined 1
-
-#endif /* !_STDBOOL_H_ */
+++ /dev/null
-// ISO C9x compliant stdint.h for Microsoft Visual Studio
-// Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124
-//
-// Copyright (c) 2006-2008 Alexander Chemeris
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-//
-// 1. Redistributions of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.
-//
-// 2. Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// 3. The name of the author may be used to endorse or promote products
-// derived from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
-// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
-// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#ifndef _MSC_VER // [
-#error "Use this header only with Microsoft Visual C++ compilers!"
-#endif // _MSC_VER ]
-
-#ifndef _MSC_STDINT_H_ // [
-#define _MSC_STDINT_H_
-
-#if _MSC_VER > 1000
-#pragma once
-#endif
-
-#include <limits.h>
-
-// For Visual Studio 6 in C++ mode and for many Visual Studio versions when
-// compiling for ARM we should wrap <wchar.h> include with 'extern "C++" {}'
-// or compiler give many errors like this:
-// error C2733: second C linkage of overloaded function 'wmemchr' not allowed
-#ifdef __cplusplus
-extern "C" {
-#endif
-# include <wchar.h>
-#ifdef __cplusplus
-}
-#endif
-
-// Define _W64 macros to mark types changing their size, like intptr_t.
-#ifndef _W64
-# if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300
-# define _W64 __w64
-# else
-# define _W64
-# endif
-#endif
-
-
-// 7.18.1 Integer types
-
-// 7.18.1.1 Exact-width integer types
-
-// Visual Studio 6 and Embedded Visual C++ 4 doesn't
-// realize that, e.g. char has the same size as __int8
-// so we give up on __intX for them.
-#if (_MSC_VER < 1300)
- typedef signed char int8_t;
- typedef signed short int16_t;
- typedef signed int int32_t;
- typedef unsigned char uint8_t;
- typedef unsigned short uint16_t;
- typedef unsigned int uint32_t;
-#else
- typedef signed __int8 int8_t;
- typedef signed __int16 int16_t;
- typedef signed __int32 int32_t;
- typedef unsigned __int8 uint8_t;
- typedef unsigned __int16 uint16_t;
- typedef unsigned __int32 uint32_t;
-#endif
-typedef signed __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-
-
-// 7.18.1.2 Minimum-width integer types
-typedef int8_t int_least8_t;
-typedef int16_t int_least16_t;
-typedef int32_t int_least32_t;
-typedef int64_t int_least64_t;
-typedef uint8_t uint_least8_t;
-typedef uint16_t uint_least16_t;
-typedef uint32_t uint_least32_t;
-typedef uint64_t uint_least64_t;
-
-// 7.18.1.3 Fastest minimum-width integer types
-typedef int8_t int_fast8_t;
-typedef int16_t int_fast16_t;
-typedef int32_t int_fast32_t;
-typedef int64_t int_fast64_t;
-typedef uint8_t uint_fast8_t;
-typedef uint16_t uint_fast16_t;
-typedef uint32_t uint_fast32_t;
-typedef uint64_t uint_fast64_t;
-
-// 7.18.1.4 Integer types capable of holding object pointers
-#ifdef _WIN64 // [
- typedef signed __int64 intptr_t;
- typedef unsigned __int64 uintptr_t;
-#else // _WIN64 ][
- typedef _W64 signed int intptr_t;
- typedef _W64 unsigned int uintptr_t;
-#endif // _WIN64 ]
-
-// 7.18.1.5 Greatest-width integer types
-typedef int64_t intmax_t;
-typedef uint64_t uintmax_t;
-
-
-// 7.18.2 Limits of specified-width integer types
-
-#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) // [ See footnote 220 at page 257 and footnote 221 at page 259
-
-// 7.18.2.1 Limits of exact-width integer types
-#define INT8_MIN ((int8_t)_I8_MIN)
-#define INT8_MAX _I8_MAX
-#define INT16_MIN ((int16_t)_I16_MIN)
-#define INT16_MAX _I16_MAX
-#define INT32_MIN ((int32_t)_I32_MIN)
-#define INT32_MAX _I32_MAX
-#define INT64_MIN ((int64_t)_I64_MIN)
-#define INT64_MAX _I64_MAX
-#define UINT8_MAX _UI8_MAX
-#define UINT16_MAX _UI16_MAX
-#define UINT32_MAX _UI32_MAX
-#define UINT64_MAX _UI64_MAX
-
-// 7.18.2.2 Limits of minimum-width integer types
-#define INT_LEAST8_MIN INT8_MIN
-#define INT_LEAST8_MAX INT8_MAX
-#define INT_LEAST16_MIN INT16_MIN
-#define INT_LEAST16_MAX INT16_MAX
-#define INT_LEAST32_MIN INT32_MIN
-#define INT_LEAST32_MAX INT32_MAX
-#define INT_LEAST64_MIN INT64_MIN
-#define INT_LEAST64_MAX INT64_MAX
-#define UINT_LEAST8_MAX UINT8_MAX
-#define UINT_LEAST16_MAX UINT16_MAX
-#define UINT_LEAST32_MAX UINT32_MAX
-#define UINT_LEAST64_MAX UINT64_MAX
-
-// 7.18.2.3 Limits of fastest minimum-width integer types
-#define INT_FAST8_MIN INT8_MIN
-#define INT_FAST8_MAX INT8_MAX
-#define INT_FAST16_MIN INT16_MIN
-#define INT_FAST16_MAX INT16_MAX
-#define INT_FAST32_MIN INT32_MIN
-#define INT_FAST32_MAX INT32_MAX
-#define INT_FAST64_MIN INT64_MIN
-#define INT_FAST64_MAX INT64_MAX
-#define UINT_FAST8_MAX UINT8_MAX
-#define UINT_FAST16_MAX UINT16_MAX
-#define UINT_FAST32_MAX UINT32_MAX
-#define UINT_FAST64_MAX UINT64_MAX
-
-// 7.18.2.4 Limits of integer types capable of holding object pointers
-#ifdef _WIN64 // [
-# define INTPTR_MIN INT64_MIN
-# define INTPTR_MAX INT64_MAX
-# define UINTPTR_MAX UINT64_MAX
-#else // _WIN64 ][
-# define INTPTR_MIN INT32_MIN
-# define INTPTR_MAX INT32_MAX
-# define UINTPTR_MAX UINT32_MAX
-#endif // _WIN64 ]
-
-// 7.18.2.5 Limits of greatest-width integer types
-#define INTMAX_MIN INT64_MIN
-#define INTMAX_MAX INT64_MAX
-#define UINTMAX_MAX UINT64_MAX
-
-// 7.18.3 Limits of other integer types
-
-#ifdef _WIN64 // [
-# define PTRDIFF_MIN _I64_MIN
-# define PTRDIFF_MAX _I64_MAX
-#else // _WIN64 ][
-# define PTRDIFF_MIN _I32_MIN
-# define PTRDIFF_MAX _I32_MAX
-#endif // _WIN64 ]
-
-#define SIG_ATOMIC_MIN INT_MIN
-#define SIG_ATOMIC_MAX INT_MAX
-
-#ifndef SIZE_MAX // [
-# ifdef _WIN64 // [
-# define SIZE_MAX _UI64_MAX
-# else // _WIN64 ][
-# define SIZE_MAX _UI32_MAX
-# endif // _WIN64 ]
-#endif // SIZE_MAX ]
-
-// WCHAR_MIN and WCHAR_MAX are also defined in <wchar.h>
-#ifndef WCHAR_MIN // [
-# define WCHAR_MIN 0
-#endif // WCHAR_MIN ]
-#ifndef WCHAR_MAX // [
-# define WCHAR_MAX _UI16_MAX
-#endif // WCHAR_MAX ]
-
-#define WINT_MIN 0
-#define WINT_MAX _UI16_MAX
-
-#endif // __STDC_LIMIT_MACROS ]
-
-
-// 7.18.4 Limits of other integer types
-
-#if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS) // [ See footnote 224 at page 260
-
-// 7.18.4.1 Macros for minimum-width integer constants
-
-#define INT8_C(val) val##i8
-#define INT16_C(val) val##i16
-#define INT32_C(val) val##i32
-#define INT64_C(val) val##i64
-
-#define UINT8_C(val) val##ui8
-#define UINT16_C(val) val##ui16
-#define UINT32_C(val) val##ui32
-#define UINT64_C(val) val##ui64
-
-// 7.18.4.2 Macros for greatest-width integer constants
-#define INTMAX_C INT64_C
-#define UINTMAX_C UINT64_C
-
-#endif // __STDC_CONSTANT_MACROS ]
-
-
-#endif // _MSC_STDINT_H_ ]
--- /dev/null
+#ifndef __glext_h_
+#define __glext_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+** Copyright (c) 2007-2010 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Header file version number, required by OpenGL ABI for Linux */
+/* glext.h last updated $Date: 2010-11-03 18:59:30 -0700 (Wed, 03 Nov 2010) $ */
+/* Current version at http://www.opengl.org/registry/ */
+#define GL_GLEXT_VERSION 66
+/* Function declaration macros - to move into glplatform.h */
+
+#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
+#define WIN32_LEAN_AND_MEAN 1
+#include <windows.h>
+#endif
+
+#ifndef APIENTRY
+#define APIENTRY
+#endif
+#ifndef APIENTRYP
+#define APIENTRYP APIENTRY *
+#endif
+#ifndef GLAPI
+#define GLAPI extern
+#endif
+
+/*************************************************************/
+
+#ifndef GL_VERSION_1_2
+#define GL_UNSIGNED_BYTE_3_3_2 0x8032
+#define GL_UNSIGNED_SHORT_4_4_4_4 0x8033
+#define GL_UNSIGNED_SHORT_5_5_5_1 0x8034
+#define GL_UNSIGNED_INT_8_8_8_8 0x8035
+#define GL_UNSIGNED_INT_10_10_10_2 0x8036
+#define GL_TEXTURE_BINDING_3D 0x806A
+#define GL_PACK_SKIP_IMAGES 0x806B
+#define GL_PACK_IMAGE_HEIGHT 0x806C
+#define GL_UNPACK_SKIP_IMAGES 0x806D
+#define GL_UNPACK_IMAGE_HEIGHT 0x806E
+#define GL_TEXTURE_3D 0x806F
+#define GL_PROXY_TEXTURE_3D 0x8070
+#define GL_TEXTURE_DEPTH 0x8071
+#define GL_TEXTURE_WRAP_R 0x8072
+#define GL_MAX_3D_TEXTURE_SIZE 0x8073
+#define GL_UNSIGNED_BYTE_2_3_3_REV 0x8362
+#define GL_UNSIGNED_SHORT_5_6_5 0x8363
+#define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364
+#define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365
+#define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
+#define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
+#define GL_UNSIGNED_INT_2_10_10_10_REV 0x8368
+#define GL_BGR 0x80E0
+#define GL_BGRA 0x80E1
+#define GL_MAX_ELEMENTS_VERTICES 0x80E8
+#define GL_MAX_ELEMENTS_INDICES 0x80E9
+#define GL_CLAMP_TO_EDGE 0x812F
+#define GL_TEXTURE_MIN_LOD 0x813A
+#define GL_TEXTURE_MAX_LOD 0x813B
+#define GL_TEXTURE_BASE_LEVEL 0x813C
+#define GL_TEXTURE_MAX_LEVEL 0x813D
+#define GL_SMOOTH_POINT_SIZE_RANGE 0x0B12
+#define GL_SMOOTH_POINT_SIZE_GRANULARITY 0x0B13
+#define GL_SMOOTH_LINE_WIDTH_RANGE 0x0B22
+#define GL_SMOOTH_LINE_WIDTH_GRANULARITY 0x0B23
+#define GL_ALIASED_LINE_WIDTH_RANGE 0x846E
+#endif
+
+#ifndef GL_VERSION_1_2_DEPRECATED
+#define GL_RESCALE_NORMAL 0x803A
+#define GL_LIGHT_MODEL_COLOR_CONTROL 0x81F8
+#define GL_SINGLE_COLOR 0x81F9
+#define GL_SEPARATE_SPECULAR_COLOR 0x81FA
+#define GL_ALIASED_POINT_SIZE_RANGE 0x846D
+#endif
+
+#ifndef GL_ARB_imaging
+#define GL_CONSTANT_COLOR 0x8001
+#define GL_ONE_MINUS_CONSTANT_COLOR 0x8002
+#define GL_CONSTANT_ALPHA 0x8003
+#define GL_ONE_MINUS_CONSTANT_ALPHA 0x8004
+#define GL_BLEND_COLOR 0x8005
+#define GL_FUNC_ADD 0x8006
+#define GL_MIN 0x8007
+#define GL_MAX 0x8008
+#define GL_BLEND_EQUATION 0x8009
+#define GL_FUNC_SUBTRACT 0x800A
+#define GL_FUNC_REVERSE_SUBTRACT 0x800B
+#endif
+
+#ifndef GL_ARB_imaging_DEPRECATED
+#define GL_CONVOLUTION_1D 0x8010
+#define GL_CONVOLUTION_2D 0x8011
+#define GL_SEPARABLE_2D 0x8012
+#define GL_CONVOLUTION_BORDER_MODE 0x8013
+#define GL_CONVOLUTION_FILTER_SCALE 0x8014
+#define GL_CONVOLUTION_FILTER_BIAS 0x8015
+#define GL_REDUCE 0x8016
+#define GL_CONVOLUTION_FORMAT 0x8017
+#define GL_CONVOLUTION_WIDTH 0x8018
+#define GL_CONVOLUTION_HEIGHT 0x8019
+#define GL_MAX_CONVOLUTION_WIDTH 0x801A
+#define GL_MAX_CONVOLUTION_HEIGHT 0x801B
+#define GL_POST_CONVOLUTION_RED_SCALE 0x801C
+#define GL_POST_CONVOLUTION_GREEN_SCALE 0x801D
+#define GL_POST_CONVOLUTION_BLUE_SCALE 0x801E
+#define GL_POST_CONVOLUTION_ALPHA_SCALE 0x801F
+#define GL_POST_CONVOLUTION_RED_BIAS 0x8020
+#define GL_POST_CONVOLUTION_GREEN_BIAS 0x8021
+#define GL_POST_CONVOLUTION_BLUE_BIAS 0x8022
+#define GL_POST_CONVOLUTION_ALPHA_BIAS 0x8023
+#define GL_HISTOGRAM 0x8024
+#define GL_PROXY_HISTOGRAM 0x8025
+#define GL_HISTOGRAM_WIDTH 0x8026
+#define GL_HISTOGRAM_FORMAT 0x8027
+#define GL_HISTOGRAM_RED_SIZE 0x8028
+#define GL_HISTOGRAM_GREEN_SIZE 0x8029
+#define GL_HISTOGRAM_BLUE_SIZE 0x802A
+#define GL_HISTOGRAM_ALPHA_SIZE 0x802B
+#define GL_HISTOGRAM_LUMINANCE_SIZE 0x802C
+#define GL_HISTOGRAM_SINK 0x802D
+#define GL_MINMAX 0x802E
+#define GL_MINMAX_FORMAT 0x802F
+#define GL_MINMAX_SINK 0x8030
+#define GL_TABLE_TOO_LARGE 0x8031
+#define GL_COLOR_MATRIX 0x80B1
+#define GL_COLOR_MATRIX_STACK_DEPTH 0x80B2
+#define GL_MAX_COLOR_MATRIX_STACK_DEPTH 0x80B3
+#define GL_POST_COLOR_MATRIX_RED_SCALE 0x80B4
+#define GL_POST_COLOR_MATRIX_GREEN_SCALE 0x80B5
+#define GL_POST_COLOR_MATRIX_BLUE_SCALE 0x80B6
+#define GL_POST_COLOR_MATRIX_ALPHA_SCALE 0x80B7
+#define GL_POST_COLOR_MATRIX_RED_BIAS 0x80B8
+#define GL_POST_COLOR_MATRIX_GREEN_BIAS 0x80B9
+#define GL_POST_COLOR_MATRIX_BLUE_BIAS 0x80BA
+#define GL_POST_COLOR_MATRIX_ALPHA_BIAS 0x80BB
+#define GL_COLOR_TABLE 0x80D0
+#define GL_POST_CONVOLUTION_COLOR_TABLE 0x80D1
+#define GL_POST_COLOR_MATRIX_COLOR_TABLE 0x80D2
+#define GL_PROXY_COLOR_TABLE 0x80D3
+#define GL_PROXY_POST_CONVOLUTION_COLOR_TABLE 0x80D4
+#define GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE 0x80D5
+#define GL_COLOR_TABLE_SCALE 0x80D6
+#define GL_COLOR_TABLE_BIAS 0x80D7
+#define GL_COLOR_TABLE_FORMAT 0x80D8
+#define GL_COLOR_TABLE_WIDTH 0x80D9
+#define GL_COLOR_TABLE_RED_SIZE 0x80DA
+#define GL_COLOR_TABLE_GREEN_SIZE 0x80DB
+#define GL_COLOR_TABLE_BLUE_SIZE 0x80DC
+#define GL_COLOR_TABLE_ALPHA_SIZE 0x80DD
+#define GL_COLOR_TABLE_LUMINANCE_SIZE 0x80DE
+#define GL_COLOR_TABLE_INTENSITY_SIZE 0x80DF
+#define GL_CONSTANT_BORDER 0x8151
+#define GL_REPLICATE_BORDER 0x8153
+#define GL_CONVOLUTION_BORDER_COLOR 0x8154
+#endif
+
+#ifndef GL_VERSION_1_3
+#define GL_TEXTURE0 0x84C0
+#define GL_TEXTURE1 0x84C1
+#define GL_TEXTURE2 0x84C2
+#define GL_TEXTURE3 0x84C3
+#define GL_TEXTURE4 0x84C4
+#define GL_TEXTURE5 0x84C5
+#define GL_TEXTURE6 0x84C6
+#define GL_TEXTURE7 0x84C7
+#define GL_TEXTURE8 0x84C8
+#define GL_TEXTURE9 0x84C9
+#define GL_TEXTURE10 0x84CA
+#define GL_TEXTURE11 0x84CB
+#define GL_TEXTURE12 0x84CC
+#define GL_TEXTURE13 0x84CD
+#define GL_TEXTURE14 0x84CE
+#define GL_TEXTURE15 0x84CF
+#define GL_TEXTURE16 0x84D0
+#define GL_TEXTURE17 0x84D1
+#define GL_TEXTURE18 0x84D2
+#define GL_TEXTURE19 0x84D3
+#define GL_TEXTURE20 0x84D4
+#define GL_TEXTURE21 0x84D5
+#define GL_TEXTURE22 0x84D6
+#define GL_TEXTURE23 0x84D7
+#define GL_TEXTURE24 0x84D8
+#define GL_TEXTURE25 0x84D9
+#define GL_TEXTURE26 0x84DA
+#define GL_TEXTURE27 0x84DB
+#define GL_TEXTURE28 0x84DC
+#define GL_TEXTURE29 0x84DD
+#define GL_TEXTURE30 0x84DE
+#define GL_TEXTURE31 0x84DF
+#define GL_ACTIVE_TEXTURE 0x84E0
+#define GL_MULTISAMPLE 0x809D
+#define GL_SAMPLE_ALPHA_TO_COVERAGE 0x809E
+#define GL_SAMPLE_ALPHA_TO_ONE 0x809F
+#define GL_SAMPLE_COVERAGE 0x80A0
+#define GL_SAMPLE_BUFFERS 0x80A8
+#define GL_SAMPLES 0x80A9
+#define GL_SAMPLE_COVERAGE_VALUE 0x80AA
+#define GL_SAMPLE_COVERAGE_INVERT 0x80AB
+#define GL_TEXTURE_CUBE_MAP 0x8513
+#define GL_TEXTURE_BINDING_CUBE_MAP 0x8514
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A
+#define GL_PROXY_TEXTURE_CUBE_MAP 0x851B
+#define GL_MAX_CUBE_MAP_TEXTURE_SIZE 0x851C
+#define GL_COMPRESSED_RGB 0x84ED
+#define GL_COMPRESSED_RGBA 0x84EE
+#define GL_TEXTURE_COMPRESSION_HINT 0x84EF
+#define GL_TEXTURE_COMPRESSED_IMAGE_SIZE 0x86A0
+#define GL_TEXTURE_COMPRESSED 0x86A1
+#define GL_NUM_COMPRESSED_TEXTURE_FORMATS 0x86A2
+#define GL_COMPRESSED_TEXTURE_FORMATS 0x86A3
+#define GL_CLAMP_TO_BORDER 0x812D
+#endif
+
+#ifndef GL_VERSION_1_3_DEPRECATED
+#define GL_CLIENT_ACTIVE_TEXTURE 0x84E1
+#define GL_MAX_TEXTURE_UNITS 0x84E2
+#define GL_TRANSPOSE_MODELVIEW_MATRIX 0x84E3
+#define GL_TRANSPOSE_PROJECTION_MATRIX 0x84E4
+#define GL_TRANSPOSE_TEXTURE_MATRIX 0x84E5
+#define GL_TRANSPOSE_COLOR_MATRIX 0x84E6
+#define GL_MULTISAMPLE_BIT 0x20000000
+#define GL_NORMAL_MAP 0x8511
+#define GL_REFLECTION_MAP 0x8512
+#define GL_COMPRESSED_ALPHA 0x84E9
+#define GL_COMPRESSED_LUMINANCE 0x84EA
+#define GL_COMPRESSED_LUMINANCE_ALPHA 0x84EB
+#define GL_COMPRESSED_INTENSITY 0x84EC
+#define GL_COMBINE 0x8570
+#define GL_COMBINE_RGB 0x8571
+#define GL_COMBINE_ALPHA 0x8572
+#define GL_SOURCE0_RGB 0x8580
+#define GL_SOURCE1_RGB 0x8581
+#define GL_SOURCE2_RGB 0x8582
+#define GL_SOURCE0_ALPHA 0x8588
+#define GL_SOURCE1_ALPHA 0x8589
+#define GL_SOURCE2_ALPHA 0x858A
+#define GL_OPERAND0_RGB 0x8590
+#define GL_OPERAND1_RGB 0x8591
+#define GL_OPERAND2_RGB 0x8592
+#define GL_OPERAND0_ALPHA 0x8598
+#define GL_OPERAND1_ALPHA 0x8599
+#define GL_OPERAND2_ALPHA 0x859A
+#define GL_RGB_SCALE 0x8573
+#define GL_ADD_SIGNED 0x8574
+#define GL_INTERPOLATE 0x8575
+#define GL_SUBTRACT 0x84E7
+#define GL_CONSTANT 0x8576
+#define GL_PRIMARY_COLOR 0x8577
+#define GL_PREVIOUS 0x8578
+#define GL_DOT3_RGB 0x86AE
+#define GL_DOT3_RGBA 0x86AF
+#endif
+
+#ifndef GL_VERSION_1_4
+#define GL_BLEND_DST_RGB 0x80C8
+#define GL_BLEND_SRC_RGB 0x80C9
+#define GL_BLEND_DST_ALPHA 0x80CA
+#define GL_BLEND_SRC_ALPHA 0x80CB
+#define GL_POINT_FADE_THRESHOLD_SIZE 0x8128
+#define GL_DEPTH_COMPONENT16 0x81A5
+#define GL_DEPTH_COMPONENT24 0x81A6
+#define GL_DEPTH_COMPONENT32 0x81A7
+#define GL_MIRRORED_REPEAT 0x8370
+#define GL_MAX_TEXTURE_LOD_BIAS 0x84FD
+#define GL_TEXTURE_LOD_BIAS 0x8501
+#define GL_INCR_WRAP 0x8507
+#define GL_DECR_WRAP 0x8508
+#define GL_TEXTURE_DEPTH_SIZE 0x884A
+#define GL_TEXTURE_COMPARE_MODE 0x884C
+#define GL_TEXTURE_COMPARE_FUNC 0x884D
+#endif
+
+#ifndef GL_VERSION_1_4_DEPRECATED
+#define GL_POINT_SIZE_MIN 0x8126
+#define GL_POINT_SIZE_MAX 0x8127
+#define GL_POINT_DISTANCE_ATTENUATION 0x8129
+#define GL_GENERATE_MIPMAP 0x8191
+#define GL_GENERATE_MIPMAP_HINT 0x8192
+#define GL_FOG_COORDINATE_SOURCE 0x8450
+#define GL_FOG_COORDINATE 0x8451
+#define GL_FRAGMENT_DEPTH 0x8452
+#define GL_CURRENT_FOG_COORDINATE 0x8453
+#define GL_FOG_COORDINATE_ARRAY_TYPE 0x8454
+#define GL_FOG_COORDINATE_ARRAY_STRIDE 0x8455
+#define GL_FOG_COORDINATE_ARRAY_POINTER 0x8456
+#define GL_FOG_COORDINATE_ARRAY 0x8457
+#define GL_COLOR_SUM 0x8458
+#define GL_CURRENT_SECONDARY_COLOR 0x8459
+#define GL_SECONDARY_COLOR_ARRAY_SIZE 0x845A
+#define GL_SECONDARY_COLOR_ARRAY_TYPE 0x845B
+#define GL_SECONDARY_COLOR_ARRAY_STRIDE 0x845C
+#define GL_SECONDARY_COLOR_ARRAY_POINTER 0x845D
+#define GL_SECONDARY_COLOR_ARRAY 0x845E
+#define GL_TEXTURE_FILTER_CONTROL 0x8500
+#define GL_DEPTH_TEXTURE_MODE 0x884B
+#define GL_COMPARE_R_TO_TEXTURE 0x884E
+#endif
+
+#ifndef GL_VERSION_1_5
+#define GL_BUFFER_SIZE 0x8764
+#define GL_BUFFER_USAGE 0x8765
+#define GL_QUERY_COUNTER_BITS 0x8864
+#define GL_CURRENT_QUERY 0x8865
+#define GL_QUERY_RESULT 0x8866
+#define GL_QUERY_RESULT_AVAILABLE 0x8867
+#define GL_ARRAY_BUFFER 0x8892
+#define GL_ELEMENT_ARRAY_BUFFER 0x8893
+#define GL_ARRAY_BUFFER_BINDING 0x8894
+#define GL_ELEMENT_ARRAY_BUFFER_BINDING 0x8895
+#define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0x889F
+#define GL_READ_ONLY 0x88B8
+#define GL_WRITE_ONLY 0x88B9
+#define GL_READ_WRITE 0x88BA
+#define GL_BUFFER_ACCESS 0x88BB
+#define GL_BUFFER_MAPPED 0x88BC
+#define GL_BUFFER_MAP_POINTER 0x88BD
+#define GL_STREAM_DRAW 0x88E0
+#define GL_STREAM_READ 0x88E1
+#define GL_STREAM_COPY 0x88E2
+#define GL_STATIC_DRAW 0x88E4
+#define GL_STATIC_READ 0x88E5
+#define GL_STATIC_COPY 0x88E6
+#define GL_DYNAMIC_DRAW 0x88E8
+#define GL_DYNAMIC_READ 0x88E9
+#define GL_DYNAMIC_COPY 0x88EA
+#define GL_SAMPLES_PASSED 0x8914
+#endif
+
+#ifndef GL_VERSION_1_5_DEPRECATED
+#define GL_VERTEX_ARRAY_BUFFER_BINDING 0x8896
+#define GL_NORMAL_ARRAY_BUFFER_BINDING 0x8897
+#define GL_COLOR_ARRAY_BUFFER_BINDING 0x8898
+#define GL_INDEX_ARRAY_BUFFER_BINDING 0x8899
+#define GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING 0x889A
+#define GL_EDGE_FLAG_ARRAY_BUFFER_BINDING 0x889B
+#define GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING 0x889C
+#define GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING 0x889D
+#define GL_WEIGHT_ARRAY_BUFFER_BINDING 0x889E
+#define GL_FOG_COORD_SRC 0x8450
+#define GL_FOG_COORD 0x8451
+#define GL_CURRENT_FOG_COORD 0x8453
+#define GL_FOG_COORD_ARRAY_TYPE 0x8454
+#define GL_FOG_COORD_ARRAY_STRIDE 0x8455
+#define GL_FOG_COORD_ARRAY_POINTER 0x8456
+#define GL_FOG_COORD_ARRAY 0x8457
+#define GL_FOG_COORD_ARRAY_BUFFER_BINDING 0x889D
+#define GL_SRC0_RGB 0x8580
+#define GL_SRC1_RGB 0x8581
+#define GL_SRC2_RGB 0x8582
+#define GL_SRC0_ALPHA 0x8588
+#define GL_SRC1_ALPHA 0x8589
+#define GL_SRC2_ALPHA 0x858A
+#endif
+
+#ifndef GL_VERSION_2_0
+#define GL_BLEND_EQUATION_RGB 0x8009
+#define GL_VERTEX_ATTRIB_ARRAY_ENABLED 0x8622
+#define GL_VERTEX_ATTRIB_ARRAY_SIZE 0x8623
+#define GL_VERTEX_ATTRIB_ARRAY_STRIDE 0x8624
+#define GL_VERTEX_ATTRIB_ARRAY_TYPE 0x8625
+#define GL_CURRENT_VERTEX_ATTRIB 0x8626
+#define GL_VERTEX_PROGRAM_POINT_SIZE 0x8642
+#define GL_VERTEX_ATTRIB_ARRAY_POINTER 0x8645
+#define GL_STENCIL_BACK_FUNC 0x8800
+#define GL_STENCIL_BACK_FAIL 0x8801
+#define GL_STENCIL_BACK_PASS_DEPTH_FAIL 0x8802
+#define GL_STENCIL_BACK_PASS_DEPTH_PASS 0x8803
+#define GL_MAX_DRAW_BUFFERS 0x8824
+#define GL_DRAW_BUFFER0 0x8825
+#define GL_DRAW_BUFFER1 0x8826
+#define GL_DRAW_BUFFER2 0x8827
+#define GL_DRAW_BUFFER3 0x8828
+#define GL_DRAW_BUFFER4 0x8829
+#define GL_DRAW_BUFFER5 0x882A
+#define GL_DRAW_BUFFER6 0x882B
+#define GL_DRAW_BUFFER7 0x882C
+#define GL_DRAW_BUFFER8 0x882D
+#define GL_DRAW_BUFFER9 0x882E
+#define GL_DRAW_BUFFER10 0x882F
+#define GL_DRAW_BUFFER11 0x8830
+#define GL_DRAW_BUFFER12 0x8831
+#define GL_DRAW_BUFFER13 0x8832
+#define GL_DRAW_BUFFER14 0x8833
+#define GL_DRAW_BUFFER15 0x8834
+#define GL_BLEND_EQUATION_ALPHA 0x883D
+#define GL_MAX_VERTEX_ATTRIBS 0x8869
+#define GL_VERTEX_ATTRIB_ARRAY_NORMALIZED 0x886A
+#define GL_MAX_TEXTURE_IMAGE_UNITS 0x8872
+#define GL_FRAGMENT_SHADER 0x8B30
+#define GL_VERTEX_SHADER 0x8B31
+#define GL_MAX_FRAGMENT_UNIFORM_COMPONENTS 0x8B49
+#define GL_MAX_VERTEX_UNIFORM_COMPONENTS 0x8B4A
+#define GL_MAX_VARYING_FLOATS 0x8B4B
+#define GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS 0x8B4C
+#define GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS 0x8B4D
+#define GL_SHADER_TYPE 0x8B4F
+#define GL_FLOAT_VEC2 0x8B50
+#define GL_FLOAT_VEC3 0x8B51
+#define GL_FLOAT_VEC4 0x8B52
+#define GL_INT_VEC2 0x8B53
+#define GL_INT_VEC3 0x8B54
+#define GL_INT_VEC4 0x8B55
+#define GL_BOOL 0x8B56
+#define GL_BOOL_VEC2 0x8B57
+#define GL_BOOL_VEC3 0x8B58
+#define GL_BOOL_VEC4 0x8B59
+#define GL_FLOAT_MAT2 0x8B5A
+#define GL_FLOAT_MAT3 0x8B5B
+#define GL_FLOAT_MAT4 0x8B5C
+#define GL_SAMPLER_1D 0x8B5D
+#define GL_SAMPLER_2D 0x8B5E
+#define GL_SAMPLER_3D 0x8B5F
+#define GL_SAMPLER_CUBE 0x8B60
+#define GL_SAMPLER_1D_SHADOW 0x8B61
+#define GL_SAMPLER_2D_SHADOW 0x8B62
+#define GL_DELETE_STATUS 0x8B80
+#define GL_COMPILE_STATUS 0x8B81
+#define GL_LINK_STATUS 0x8B82
+#define GL_VALIDATE_STATUS 0x8B83
+#define GL_INFO_LOG_LENGTH 0x8B84
+#define GL_ATTACHED_SHADERS 0x8B85
+#define GL_ACTIVE_UNIFORMS 0x8B86
+#define GL_ACTIVE_UNIFORM_MAX_LENGTH 0x8B87
+#define GL_SHADER_SOURCE_LENGTH 0x8B88
+#define GL_ACTIVE_ATTRIBUTES 0x8B89
+#define GL_ACTIVE_ATTRIBUTE_MAX_LENGTH 0x8B8A
+#define GL_FRAGMENT_SHADER_DERIVATIVE_HINT 0x8B8B
+#define GL_SHADING_LANGUAGE_VERSION 0x8B8C
+#define GL_CURRENT_PROGRAM 0x8B8D
+#define GL_POINT_SPRITE_COORD_ORIGIN 0x8CA0
+#define GL_LOWER_LEFT 0x8CA1
+#define GL_UPPER_LEFT 0x8CA2
+#define GL_STENCIL_BACK_REF 0x8CA3
+#define GL_STENCIL_BACK_VALUE_MASK 0x8CA4
+#define GL_STENCIL_BACK_WRITEMASK 0x8CA5
+#endif
+
+#ifndef GL_VERSION_2_0_DEPRECATED
+#define GL_VERTEX_PROGRAM_TWO_SIDE 0x8643
+#define GL_POINT_SPRITE 0x8861
+#define GL_COORD_REPLACE 0x8862
+#define GL_MAX_TEXTURE_COORDS 0x8871
+#endif
+
+#ifndef GL_VERSION_2_1
+#define GL_PIXEL_PACK_BUFFER 0x88EB
+#define GL_PIXEL_UNPACK_BUFFER 0x88EC
+#define GL_PIXEL_PACK_BUFFER_BINDING 0x88ED
+#define GL_PIXEL_UNPACK_BUFFER_BINDING 0x88EF
+#define GL_FLOAT_MAT2x3 0x8B65
+#define GL_FLOAT_MAT2x4 0x8B66
+#define GL_FLOAT_MAT3x2 0x8B67
+#define GL_FLOAT_MAT3x4 0x8B68
+#define GL_FLOAT_MAT4x2 0x8B69
+#define GL_FLOAT_MAT4x3 0x8B6A
+#define GL_SRGB 0x8C40
+#define GL_SRGB8 0x8C41
+#define GL_SRGB_ALPHA 0x8C42
+#define GL_SRGB8_ALPHA8 0x8C43
+#define GL_COMPRESSED_SRGB 0x8C48
+#define GL_COMPRESSED_SRGB_ALPHA 0x8C49
+#endif
+
+#ifndef GL_VERSION_2_1_DEPRECATED
+#define GL_CURRENT_RASTER_SECONDARY_COLOR 0x845F
+#define GL_SLUMINANCE_ALPHA 0x8C44
+#define GL_SLUMINANCE8_ALPHA8 0x8C45
+#define GL_SLUMINANCE 0x8C46
+#define GL_SLUMINANCE8 0x8C47
+#define GL_COMPRESSED_SLUMINANCE 0x8C4A
+#define GL_COMPRESSED_SLUMINANCE_ALPHA 0x8C4B
+#endif
+
+#ifndef GL_VERSION_3_0
+#define GL_COMPARE_REF_TO_TEXTURE 0x884E
+#define GL_CLIP_DISTANCE0 0x3000
+#define GL_CLIP_DISTANCE1 0x3001
+#define GL_CLIP_DISTANCE2 0x3002
+#define GL_CLIP_DISTANCE3 0x3003
+#define GL_CLIP_DISTANCE4 0x3004
+#define GL_CLIP_DISTANCE5 0x3005
+#define GL_CLIP_DISTANCE6 0x3006
+#define GL_CLIP_DISTANCE7 0x3007
+#define GL_MAX_CLIP_DISTANCES 0x0D32
+#define GL_MAJOR_VERSION 0x821B
+#define GL_MINOR_VERSION 0x821C
+#define GL_NUM_EXTENSIONS 0x821D
+#define GL_CONTEXT_FLAGS 0x821E
+#define GL_DEPTH_BUFFER 0x8223
+#define GL_STENCIL_BUFFER 0x8224
+#define GL_COMPRESSED_RED 0x8225
+#define GL_COMPRESSED_RG 0x8226
+#define GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT 0x0001
+#define GL_RGBA32F 0x8814
+#define GL_RGB32F 0x8815
+#define GL_RGBA16F 0x881A
+#define GL_RGB16F 0x881B
+#define GL_VERTEX_ATTRIB_ARRAY_INTEGER 0x88FD
+#define GL_MAX_ARRAY_TEXTURE_LAYERS 0x88FF
+#define GL_MIN_PROGRAM_TEXEL_OFFSET 0x8904
+#define GL_MAX_PROGRAM_TEXEL_OFFSET 0x8905
+#define GL_CLAMP_READ_COLOR 0x891C
+#define GL_FIXED_ONLY 0x891D
+#define GL_MAX_VARYING_COMPONENTS 0x8B4B
+#define GL_TEXTURE_1D_ARRAY 0x8C18
+#define GL_PROXY_TEXTURE_1D_ARRAY 0x8C19
+#define GL_TEXTURE_2D_ARRAY 0x8C1A
+#define GL_PROXY_TEXTURE_2D_ARRAY 0x8C1B
+#define GL_TEXTURE_BINDING_1D_ARRAY 0x8C1C
+#define GL_TEXTURE_BINDING_2D_ARRAY 0x8C1D
+#define GL_R11F_G11F_B10F 0x8C3A
+#define GL_UNSIGNED_INT_10F_11F_11F_REV 0x8C3B
+#define GL_RGB9_E5 0x8C3D
+#define GL_UNSIGNED_INT_5_9_9_9_REV 0x8C3E
+#define GL_TEXTURE_SHARED_SIZE 0x8C3F
+#define GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH 0x8C76
+#define GL_TRANSFORM_FEEDBACK_BUFFER_MODE 0x8C7F
+#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS 0x8C80
+#define GL_TRANSFORM_FEEDBACK_VARYINGS 0x8C83
+#define GL_TRANSFORM_FEEDBACK_BUFFER_START 0x8C84
+#define GL_TRANSFORM_FEEDBACK_BUFFER_SIZE 0x8C85
+#define GL_PRIMITIVES_GENERATED 0x8C87
+#define GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN 0x8C88
+#define GL_RASTERIZER_DISCARD 0x8C89
+#define GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS 0x8C8A
+#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS 0x8C8B
+#define GL_INTERLEAVED_ATTRIBS 0x8C8C
+#define GL_SEPARATE_ATTRIBS 0x8C8D
+#define GL_TRANSFORM_FEEDBACK_BUFFER 0x8C8E
+#define GL_TRANSFORM_FEEDBACK_BUFFER_BINDING 0x8C8F
+#define GL_RGBA32UI 0x8D70
+#define GL_RGB32UI 0x8D71
+#define GL_RGBA16UI 0x8D76
+#define GL_RGB16UI 0x8D77
+#define GL_RGBA8UI 0x8D7C
+#define GL_RGB8UI 0x8D7D
+#define GL_RGBA32I 0x8D82
+#define GL_RGB32I 0x8D83
+#define GL_RGBA16I 0x8D88
+#define GL_RGB16I 0x8D89
+#define GL_RGBA8I 0x8D8E
+#define GL_RGB8I 0x8D8F
+#define GL_RED_INTEGER 0x8D94
+#define GL_GREEN_INTEGER 0x8D95
+#define GL_BLUE_INTEGER 0x8D96
+#define GL_RGB_INTEGER 0x8D98
+#define GL_RGBA_INTEGER 0x8D99
+#define GL_BGR_INTEGER 0x8D9A
+#define GL_BGRA_INTEGER 0x8D9B
+#define GL_SAMPLER_1D_ARRAY 0x8DC0
+#define GL_SAMPLER_2D_ARRAY 0x8DC1
+#define GL_SAMPLER_1D_ARRAY_SHADOW 0x8DC3
+#define GL_SAMPLER_2D_ARRAY_SHADOW 0x8DC4
+#define GL_SAMPLER_CUBE_SHADOW 0x8DC5
+#define GL_UNSIGNED_INT_VEC2 0x8DC6
+#define GL_UNSIGNED_INT_VEC3 0x8DC7
+#define GL_UNSIGNED_INT_VEC4 0x8DC8
+#define GL_INT_SAMPLER_1D 0x8DC9
+#define GL_INT_SAMPLER_2D 0x8DCA
+#define GL_INT_SAMPLER_3D 0x8DCB
+#define GL_INT_SAMPLER_CUBE 0x8DCC
+#define GL_INT_SAMPLER_1D_ARRAY 0x8DCE
+#define GL_INT_SAMPLER_2D_ARRAY 0x8DCF
+#define GL_UNSIGNED_INT_SAMPLER_1D 0x8DD1
+#define GL_UNSIGNED_INT_SAMPLER_2D 0x8DD2
+#define GL_UNSIGNED_INT_SAMPLER_3D 0x8DD3
+#define GL_UNSIGNED_INT_SAMPLER_CUBE 0x8DD4
+#define GL_UNSIGNED_INT_SAMPLER_1D_ARRAY 0x8DD6
+#define GL_UNSIGNED_INT_SAMPLER_2D_ARRAY 0x8DD7
+#define GL_QUERY_WAIT 0x8E13
+#define GL_QUERY_NO_WAIT 0x8E14
+#define GL_QUERY_BY_REGION_WAIT 0x8E15
+#define GL_QUERY_BY_REGION_NO_WAIT 0x8E16
+#define GL_BUFFER_ACCESS_FLAGS 0x911F
+#define GL_BUFFER_MAP_LENGTH 0x9120
+#define GL_BUFFER_MAP_OFFSET 0x9121
+/* Reuse tokens from ARB_depth_buffer_float */
+/* reuse GL_DEPTH_COMPONENT32F */
+/* reuse GL_DEPTH32F_STENCIL8 */
+/* reuse GL_FLOAT_32_UNSIGNED_INT_24_8_REV */
+/* Reuse tokens from ARB_framebuffer_object */
+/* reuse GL_INVALID_FRAMEBUFFER_OPERATION */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE */
+/* reuse GL_FRAMEBUFFER_DEFAULT */
+/* reuse GL_FRAMEBUFFER_UNDEFINED */
+/* reuse GL_DEPTH_STENCIL_ATTACHMENT */
+/* reuse GL_INDEX */
+/* reuse GL_MAX_RENDERBUFFER_SIZE */
+/* reuse GL_DEPTH_STENCIL */
+/* reuse GL_UNSIGNED_INT_24_8 */
+/* reuse GL_DEPTH24_STENCIL8 */
+/* reuse GL_TEXTURE_STENCIL_SIZE */
+/* reuse GL_TEXTURE_RED_TYPE */
+/* reuse GL_TEXTURE_GREEN_TYPE */
+/* reuse GL_TEXTURE_BLUE_TYPE */
+/* reuse GL_TEXTURE_ALPHA_TYPE */
+/* reuse GL_TEXTURE_DEPTH_TYPE */
+/* reuse GL_UNSIGNED_NORMALIZED */
+/* reuse GL_FRAMEBUFFER_BINDING */
+/* reuse GL_DRAW_FRAMEBUFFER_BINDING */
+/* reuse GL_RENDERBUFFER_BINDING */
+/* reuse GL_READ_FRAMEBUFFER */
+/* reuse GL_DRAW_FRAMEBUFFER */
+/* reuse GL_READ_FRAMEBUFFER_BINDING */
+/* reuse GL_RENDERBUFFER_SAMPLES */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER */
+/* reuse GL_FRAMEBUFFER_COMPLETE */
+/* reuse GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT */
+/* reuse GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT */
+/* reuse GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER */
+/* reuse GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER */
+/* reuse GL_FRAMEBUFFER_UNSUPPORTED */
+/* reuse GL_MAX_COLOR_ATTACHMENTS */
+/* reuse GL_COLOR_ATTACHMENT0 */
+/* reuse GL_COLOR_ATTACHMENT1 */
+/* reuse GL_COLOR_ATTACHMENT2 */
+/* reuse GL_COLOR_ATTACHMENT3 */
+/* reuse GL_COLOR_ATTACHMENT4 */
+/* reuse GL_COLOR_ATTACHMENT5 */
+/* reuse GL_COLOR_ATTACHMENT6 */
+/* reuse GL_COLOR_ATTACHMENT7 */
+/* reuse GL_COLOR_ATTACHMENT8 */
+/* reuse GL_COLOR_ATTACHMENT9 */
+/* reuse GL_COLOR_ATTACHMENT10 */
+/* reuse GL_COLOR_ATTACHMENT11 */
+/* reuse GL_COLOR_ATTACHMENT12 */
+/* reuse GL_COLOR_ATTACHMENT13 */
+/* reuse GL_COLOR_ATTACHMENT14 */
+/* reuse GL_COLOR_ATTACHMENT15 */
+/* reuse GL_DEPTH_ATTACHMENT */
+/* reuse GL_STENCIL_ATTACHMENT */
+/* reuse GL_FRAMEBUFFER */
+/* reuse GL_RENDERBUFFER */
+/* reuse GL_RENDERBUFFER_WIDTH */
+/* reuse GL_RENDERBUFFER_HEIGHT */
+/* reuse GL_RENDERBUFFER_INTERNAL_FORMAT */
+/* reuse GL_STENCIL_INDEX1 */
+/* reuse GL_STENCIL_INDEX4 */
+/* reuse GL_STENCIL_INDEX8 */
+/* reuse GL_STENCIL_INDEX16 */
+/* reuse GL_RENDERBUFFER_RED_SIZE */
+/* reuse GL_RENDERBUFFER_GREEN_SIZE */
+/* reuse GL_RENDERBUFFER_BLUE_SIZE */
+/* reuse GL_RENDERBUFFER_ALPHA_SIZE */
+/* reuse GL_RENDERBUFFER_DEPTH_SIZE */
+/* reuse GL_RENDERBUFFER_STENCIL_SIZE */
+/* reuse GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE */
+/* reuse GL_MAX_SAMPLES */
+/* Reuse tokens from ARB_framebuffer_sRGB */
+/* reuse GL_FRAMEBUFFER_SRGB */
+/* Reuse tokens from ARB_half_float_vertex */
+/* reuse GL_HALF_FLOAT */
+/* Reuse tokens from ARB_map_buffer_range */
+/* reuse GL_MAP_READ_BIT */
+/* reuse GL_MAP_WRITE_BIT */
+/* reuse GL_MAP_INVALIDATE_RANGE_BIT */
+/* reuse GL_MAP_INVALIDATE_BUFFER_BIT */
+/* reuse GL_MAP_FLUSH_EXPLICIT_BIT */
+/* reuse GL_MAP_UNSYNCHRONIZED_BIT */
+/* Reuse tokens from ARB_texture_compression_rgtc */
+/* reuse GL_COMPRESSED_RED_RGTC1 */
+/* reuse GL_COMPRESSED_SIGNED_RED_RGTC1 */
+/* reuse GL_COMPRESSED_RG_RGTC2 */
+/* reuse GL_COMPRESSED_SIGNED_RG_RGTC2 */
+/* Reuse tokens from ARB_texture_rg */
+/* reuse GL_RG */
+/* reuse GL_RG_INTEGER */
+/* reuse GL_R8 */
+/* reuse GL_R16 */
+/* reuse GL_RG8 */
+/* reuse GL_RG16 */
+/* reuse GL_R16F */
+/* reuse GL_R32F */
+/* reuse GL_RG16F */
+/* reuse GL_RG32F */
+/* reuse GL_R8I */
+/* reuse GL_R8UI */
+/* reuse GL_R16I */
+/* reuse GL_R16UI */
+/* reuse GL_R32I */
+/* reuse GL_R32UI */
+/* reuse GL_RG8I */
+/* reuse GL_RG8UI */
+/* reuse GL_RG16I */
+/* reuse GL_RG16UI */
+/* reuse GL_RG32I */
+/* reuse GL_RG32UI */
+/* Reuse tokens from ARB_vertex_array_object */
+/* reuse GL_VERTEX_ARRAY_BINDING */
+#endif
+
+#ifndef GL_VERSION_3_0_DEPRECATED
+#define GL_CLAMP_VERTEX_COLOR 0x891A
+#define GL_CLAMP_FRAGMENT_COLOR 0x891B
+#define GL_ALPHA_INTEGER 0x8D97
+/* Reuse tokens from ARB_framebuffer_object */
+/* reuse GL_TEXTURE_LUMINANCE_TYPE */
+/* reuse GL_TEXTURE_INTENSITY_TYPE */
+#endif
+
+#ifndef GL_VERSION_3_1
+#define GL_SAMPLER_2D_RECT 0x8B63
+#define GL_SAMPLER_2D_RECT_SHADOW 0x8B64
+#define GL_SAMPLER_BUFFER 0x8DC2
+#define GL_INT_SAMPLER_2D_RECT 0x8DCD
+#define GL_INT_SAMPLER_BUFFER 0x8DD0
+#define GL_UNSIGNED_INT_SAMPLER_2D_RECT 0x8DD5
+#define GL_UNSIGNED_INT_SAMPLER_BUFFER 0x8DD8
+#define GL_TEXTURE_BUFFER 0x8C2A
+#define GL_MAX_TEXTURE_BUFFER_SIZE 0x8C2B
+#define GL_TEXTURE_BINDING_BUFFER 0x8C2C
+#define GL_TEXTURE_BUFFER_DATA_STORE_BINDING 0x8C2D
+#define GL_TEXTURE_BUFFER_FORMAT 0x8C2E
+#define GL_TEXTURE_RECTANGLE 0x84F5
+#define GL_TEXTURE_BINDING_RECTANGLE 0x84F6
+#define GL_PROXY_TEXTURE_RECTANGLE 0x84F7
+#define GL_MAX_RECTANGLE_TEXTURE_SIZE 0x84F8
+#define GL_RED_SNORM 0x8F90
+#define GL_RG_SNORM 0x8F91
+#define GL_RGB_SNORM 0x8F92
+#define GL_RGBA_SNORM 0x8F93
+#define GL_R8_SNORM 0x8F94
+#define GL_RG8_SNORM 0x8F95
+#define GL_RGB8_SNORM 0x8F96
+#define GL_RGBA8_SNORM 0x8F97
+#define GL_R16_SNORM 0x8F98
+#define GL_RG16_SNORM 0x8F99
+#define GL_RGB16_SNORM 0x8F9A
+#define GL_RGBA16_SNORM 0x8F9B
+#define GL_SIGNED_NORMALIZED 0x8F9C
+#define GL_PRIMITIVE_RESTART 0x8F9D
+#define GL_PRIMITIVE_RESTART_INDEX 0x8F9E
+/* Reuse tokens from ARB_copy_buffer */
+/* reuse GL_COPY_READ_BUFFER */
+/* reuse GL_COPY_WRITE_BUFFER */
+/* Reuse tokens from ARB_draw_instanced (none) */
+/* Reuse tokens from ARB_uniform_buffer_object */
+/* reuse GL_UNIFORM_BUFFER */
+/* reuse GL_UNIFORM_BUFFER_BINDING */
+/* reuse GL_UNIFORM_BUFFER_START */
+/* reuse GL_UNIFORM_BUFFER_SIZE */
+/* reuse GL_MAX_VERTEX_UNIFORM_BLOCKS */
+/* reuse GL_MAX_FRAGMENT_UNIFORM_BLOCKS */
+/* reuse GL_MAX_COMBINED_UNIFORM_BLOCKS */
+/* reuse GL_MAX_UNIFORM_BUFFER_BINDINGS */
+/* reuse GL_MAX_UNIFORM_BLOCK_SIZE */
+/* reuse GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS */
+/* reuse GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS */
+/* reuse GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT */
+/* reuse GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH */
+/* reuse GL_ACTIVE_UNIFORM_BLOCKS */
+/* reuse GL_UNIFORM_TYPE */
+/* reuse GL_UNIFORM_SIZE */
+/* reuse GL_UNIFORM_NAME_LENGTH */
+/* reuse GL_UNIFORM_BLOCK_INDEX */
+/* reuse GL_UNIFORM_OFFSET */
+/* reuse GL_UNIFORM_ARRAY_STRIDE */
+/* reuse GL_UNIFORM_MATRIX_STRIDE */
+/* reuse GL_UNIFORM_IS_ROW_MAJOR */
+/* reuse GL_UNIFORM_BLOCK_BINDING */
+/* reuse GL_UNIFORM_BLOCK_DATA_SIZE */
+/* reuse GL_UNIFORM_BLOCK_NAME_LENGTH */
+/* reuse GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS */
+/* reuse GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES */
+/* reuse GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER */
+/* reuse GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER */
+/* reuse GL_INVALID_INDEX */
+#endif
+
+#ifndef GL_VERSION_3_2
+#define GL_CONTEXT_CORE_PROFILE_BIT 0x00000001
+#define GL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002
+#define GL_LINES_ADJACENCY 0x000A
+#define GL_LINE_STRIP_ADJACENCY 0x000B
+#define GL_TRIANGLES_ADJACENCY 0x000C
+#define GL_TRIANGLE_STRIP_ADJACENCY 0x000D
+#define GL_PROGRAM_POINT_SIZE 0x8642
+#define GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS 0x8C29
+#define GL_FRAMEBUFFER_ATTACHMENT_LAYERED 0x8DA7
+#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS 0x8DA8
+#define GL_GEOMETRY_SHADER 0x8DD9
+#define GL_GEOMETRY_VERTICES_OUT 0x8916
+#define GL_GEOMETRY_INPUT_TYPE 0x8917
+#define GL_GEOMETRY_OUTPUT_TYPE 0x8918
+#define GL_MAX_GEOMETRY_UNIFORM_COMPONENTS 0x8DDF
+#define GL_MAX_GEOMETRY_OUTPUT_VERTICES 0x8DE0
+#define GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS 0x8DE1
+#define GL_MAX_VERTEX_OUTPUT_COMPONENTS 0x9122
+#define GL_MAX_GEOMETRY_INPUT_COMPONENTS 0x9123
+#define GL_MAX_GEOMETRY_OUTPUT_COMPONENTS 0x9124
+#define GL_MAX_FRAGMENT_INPUT_COMPONENTS 0x9125
+#define GL_CONTEXT_PROFILE_MASK 0x9126
+/* reuse GL_MAX_VARYING_COMPONENTS */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER */
+/* Reuse tokens from ARB_depth_clamp */
+/* reuse GL_DEPTH_CLAMP */
+/* Reuse tokens from ARB_draw_elements_base_vertex (none) */
+/* Reuse tokens from ARB_fragment_coord_conventions (none) */
+/* Reuse tokens from ARB_provoking_vertex */
+/* reuse GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION */
+/* reuse GL_FIRST_VERTEX_CONVENTION */
+/* reuse GL_LAST_VERTEX_CONVENTION */
+/* reuse GL_PROVOKING_VERTEX */
+/* Reuse tokens from ARB_seamless_cube_map */
+/* reuse GL_TEXTURE_CUBE_MAP_SEAMLESS */
+/* Reuse tokens from ARB_sync */
+/* reuse GL_MAX_SERVER_WAIT_TIMEOUT */
+/* reuse GL_OBJECT_TYPE */
+/* reuse GL_SYNC_CONDITION */
+/* reuse GL_SYNC_STATUS */
+/* reuse GL_SYNC_FLAGS */
+/* reuse GL_SYNC_FENCE */
+/* reuse GL_SYNC_GPU_COMMANDS_COMPLETE */
+/* reuse GL_UNSIGNALED */
+/* reuse GL_SIGNALED */
+/* reuse GL_ALREADY_SIGNALED */
+/* reuse GL_TIMEOUT_EXPIRED */
+/* reuse GL_CONDITION_SATISFIED */
+/* reuse GL_WAIT_FAILED */
+/* reuse GL_TIMEOUT_IGNORED */
+/* reuse GL_SYNC_FLUSH_COMMANDS_BIT */
+/* reuse GL_TIMEOUT_IGNORED */
+/* Reuse tokens from ARB_texture_multisample */
+/* reuse GL_SAMPLE_POSITION */
+/* reuse GL_SAMPLE_MASK */
+/* reuse GL_SAMPLE_MASK_VALUE */
+/* reuse GL_MAX_SAMPLE_MASK_WORDS */
+/* reuse GL_TEXTURE_2D_MULTISAMPLE */
+/* reuse GL_PROXY_TEXTURE_2D_MULTISAMPLE */
+/* reuse GL_TEXTURE_2D_MULTISAMPLE_ARRAY */
+/* reuse GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY */
+/* reuse GL_TEXTURE_BINDING_2D_MULTISAMPLE */
+/* reuse GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY */
+/* reuse GL_TEXTURE_SAMPLES */
+/* reuse GL_TEXTURE_FIXED_SAMPLE_LOCATIONS */
+/* reuse GL_SAMPLER_2D_MULTISAMPLE */
+/* reuse GL_INT_SAMPLER_2D_MULTISAMPLE */
+/* reuse GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE */
+/* reuse GL_SAMPLER_2D_MULTISAMPLE_ARRAY */
+/* reuse GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY */
+/* reuse GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY */
+/* reuse GL_MAX_COLOR_TEXTURE_SAMPLES */
+/* reuse GL_MAX_DEPTH_TEXTURE_SAMPLES */
+/* reuse GL_MAX_INTEGER_SAMPLES */
+/* Don't need to reuse tokens from ARB_vertex_array_bgra since they're already in 1.2 core */
+#endif
+
+#ifndef GL_VERSION_3_3
+#define GL_VERTEX_ATTRIB_ARRAY_DIVISOR 0x88FE
+/* Reuse tokens from ARB_blend_func_extended */
+/* reuse GL_SRC1_COLOR */
+/* reuse GL_ONE_MINUS_SRC1_COLOR */
+/* reuse GL_ONE_MINUS_SRC1_ALPHA */
+/* reuse GL_MAX_DUAL_SOURCE_DRAW_BUFFERS */
+/* Reuse tokens from ARB_explicit_attrib_location (none) */
+/* Reuse tokens from ARB_occlusion_query2 */
+/* reuse GL_ANY_SAMPLES_PASSED */
+/* Reuse tokens from ARB_sampler_objects */
+/* reuse GL_SAMPLER_BINDING */
+/* Reuse tokens from ARB_shader_bit_encoding (none) */
+/* Reuse tokens from ARB_texture_rgb10_a2ui */
+/* reuse GL_RGB10_A2UI */
+/* Reuse tokens from ARB_texture_swizzle */
+/* reuse GL_TEXTURE_SWIZZLE_R */
+/* reuse GL_TEXTURE_SWIZZLE_G */
+/* reuse GL_TEXTURE_SWIZZLE_B */
+/* reuse GL_TEXTURE_SWIZZLE_A */
+/* reuse GL_TEXTURE_SWIZZLE_RGBA */
+/* Reuse tokens from ARB_timer_query */
+/* reuse GL_TIME_ELAPSED */
+/* reuse GL_TIMESTAMP */
+/* Reuse tokens from ARB_vertex_type_2_10_10_10_rev */
+/* reuse GL_INT_2_10_10_10_REV */
+#endif
+
+#ifndef GL_VERSION_4_0
+#define GL_SAMPLE_SHADING 0x8C36
+#define GL_MIN_SAMPLE_SHADING_VALUE 0x8C37
+#define GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET 0x8E5E
+#define GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET 0x8E5F
+#define GL_TEXTURE_CUBE_MAP_ARRAY 0x9009
+#define GL_TEXTURE_BINDING_CUBE_MAP_ARRAY 0x900A
+#define GL_PROXY_TEXTURE_CUBE_MAP_ARRAY 0x900B
+#define GL_SAMPLER_CUBE_MAP_ARRAY 0x900C
+#define GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW 0x900D
+#define GL_INT_SAMPLER_CUBE_MAP_ARRAY 0x900E
+#define GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY 0x900F
+/* Reuse tokens from ARB_texture_query_lod (none) */
+/* Reuse tokens from ARB_draw_buffers_blend (none) */
+/* Reuse tokens from ARB_draw_indirect */
+/* reuse GL_DRAW_INDIRECT_BUFFER */
+/* reuse GL_DRAW_INDIRECT_BUFFER_BINDING */
+/* Reuse tokens from ARB_gpu_shader5 */
+/* reuse GL_GEOMETRY_SHADER_INVOCATIONS */
+/* reuse GL_MAX_GEOMETRY_SHADER_INVOCATIONS */
+/* reuse GL_MIN_FRAGMENT_INTERPOLATION_OFFSET */
+/* reuse GL_MAX_FRAGMENT_INTERPOLATION_OFFSET */
+/* reuse GL_FRAGMENT_INTERPOLATION_OFFSET_BITS */
+/* reuse GL_MAX_VERTEX_STREAMS */
+/* Reuse tokens from ARB_gpu_shader_fp64 */
+/* reuse GL_DOUBLE_VEC2 */
+/* reuse GL_DOUBLE_VEC3 */
+/* reuse GL_DOUBLE_VEC4 */
+/* reuse GL_DOUBLE_MAT2 */
+/* reuse GL_DOUBLE_MAT3 */
+/* reuse GL_DOUBLE_MAT4 */
+/* reuse GL_DOUBLE_MAT2x3 */
+/* reuse GL_DOUBLE_MAT2x4 */
+/* reuse GL_DOUBLE_MAT3x2 */
+/* reuse GL_DOUBLE_MAT3x4 */
+/* reuse GL_DOUBLE_MAT4x2 */
+/* reuse GL_DOUBLE_MAT4x3 */
+/* Reuse tokens from ARB_shader_subroutine */
+/* reuse GL_ACTIVE_SUBROUTINES */
+/* reuse GL_ACTIVE_SUBROUTINE_UNIFORMS */
+/* reuse GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS */
+/* reuse GL_ACTIVE_SUBROUTINE_MAX_LENGTH */
+/* reuse GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH */
+/* reuse GL_MAX_SUBROUTINES */
+/* reuse GL_MAX_SUBROUTINE_UNIFORM_LOCATIONS */
+/* reuse GL_NUM_COMPATIBLE_SUBROUTINES */
+/* reuse GL_COMPATIBLE_SUBROUTINES */
+/* Reuse tokens from ARB_tessellation_shader */
+/* reuse GL_PATCHES */
+/* reuse GL_PATCH_VERTICES */
+/* reuse GL_PATCH_DEFAULT_INNER_LEVEL */
+/* reuse GL_PATCH_DEFAULT_OUTER_LEVEL */
+/* reuse GL_TESS_CONTROL_OUTPUT_VERTICES */
+/* reuse GL_TESS_GEN_MODE */
+/* reuse GL_TESS_GEN_SPACING */
+/* reuse GL_TESS_GEN_VERTEX_ORDER */
+/* reuse GL_TESS_GEN_POINT_MODE */
+/* reuse GL_ISOLINES */
+/* reuse GL_FRACTIONAL_ODD */
+/* reuse GL_FRACTIONAL_EVEN */
+/* reuse GL_MAX_PATCH_VERTICES */
+/* reuse GL_MAX_TESS_GEN_LEVEL */
+/* reuse GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS */
+/* reuse GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS */
+/* reuse GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS */
+/* reuse GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS */
+/* reuse GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS */
+/* reuse GL_MAX_TESS_PATCH_COMPONENTS */
+/* reuse GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS */
+/* reuse GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS */
+/* reuse GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS */
+/* reuse GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS */
+/* reuse GL_MAX_TESS_CONTROL_INPUT_COMPONENTS */
+/* reuse GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS */
+/* reuse GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS */
+/* reuse GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS */
+/* reuse GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER */
+/* reuse GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER */
+/* reuse GL_TESS_EVALUATION_SHADER */
+/* reuse GL_TESS_CONTROL_SHADER */
+/* Reuse tokens from ARB_texture_buffer_object_rgb32 (none) */
+/* Reuse tokens from ARB_transform_feedback2 */
+/* reuse GL_TRANSFORM_FEEDBACK */
+/* reuse GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED */
+/* reuse GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE */
+/* reuse GL_TRANSFORM_FEEDBACK_BINDING */
+/* Reuse tokens from ARB_transform_feedback3 */
+/* reuse GL_MAX_TRANSFORM_FEEDBACK_BUFFERS */
+/* reuse GL_MAX_VERTEX_STREAMS */
+#endif
+
+#ifndef GL_VERSION_4_1
+/* Reuse tokens from ARB_ES2_compatibility */
+/* reuse GL_FIXED */
+/* reuse GL_IMPLEMENTATION_COLOR_READ_TYPE */
+/* reuse GL_IMPLEMENTATION_COLOR_READ_FORMAT */
+/* reuse GL_LOW_FLOAT */
+/* reuse GL_MEDIUM_FLOAT */
+/* reuse GL_HIGH_FLOAT */
+/* reuse GL_LOW_INT */
+/* reuse GL_MEDIUM_INT */
+/* reuse GL_HIGH_INT */
+/* reuse GL_SHADER_COMPILER */
+/* reuse GL_NUM_SHADER_BINARY_FORMATS */
+/* reuse GL_MAX_VERTEX_UNIFORM_VECTORS */
+/* reuse GL_MAX_VARYING_VECTORS */
+/* reuse GL_MAX_FRAGMENT_UNIFORM_VECTORS */
+/* Reuse tokens from ARB_get_program_binary */
+/* reuse GL_PROGRAM_BINARY_RETRIEVABLE_HINT */
+/* reuse GL_PROGRAM_BINARY_LENGTH */
+/* reuse GL_NUM_PROGRAM_BINARY_FORMATS */
+/* reuse GL_PROGRAM_BINARY_FORMATS */
+/* Reuse tokens from ARB_separate_shader_objects */
+/* reuse GL_VERTEX_SHADER_BIT */
+/* reuse GL_FRAGMENT_SHADER_BIT */
+/* reuse GL_GEOMETRY_SHADER_BIT */
+/* reuse GL_TESS_CONTROL_SHADER_BIT */
+/* reuse GL_TESS_EVALUATION_SHADER_BIT */
+/* reuse GL_ALL_SHADER_BITS */
+/* reuse GL_PROGRAM_SEPARABLE */
+/* reuse GL_ACTIVE_PROGRAM */
+/* reuse GL_PROGRAM_PIPELINE_BINDING */
+/* Reuse tokens from ARB_shader_precision (none) */
+/* Reuse tokens from ARB_vertex_attrib_64bit - all are in GL 3.0 and 4.0 already */
+/* Reuse tokens from ARB_viewport_array - some are in GL 1.1 and ARB_provoking_vertex already */
+/* reuse GL_MAX_VIEWPORTS */
+/* reuse GL_VIEWPORT_SUBPIXEL_BITS */
+/* reuse GL_VIEWPORT_BOUNDS_RANGE */
+/* reuse GL_LAYER_PROVOKING_VERTEX */
+/* reuse GL_VIEWPORT_INDEX_PROVOKING_VERTEX */
+/* reuse GL_UNDEFINED_VERTEX */
+#endif
+
+#ifndef GL_ARB_multitexture
+#define GL_TEXTURE0_ARB 0x84C0
+#define GL_TEXTURE1_ARB 0x84C1
+#define GL_TEXTURE2_ARB 0x84C2
+#define GL_TEXTURE3_ARB 0x84C3
+#define GL_TEXTURE4_ARB 0x84C4
+#define GL_TEXTURE5_ARB 0x84C5
+#define GL_TEXTURE6_ARB 0x84C6
+#define GL_TEXTURE7_ARB 0x84C7
+#define GL_TEXTURE8_ARB 0x84C8
+#define GL_TEXTURE9_ARB 0x84C9
+#define GL_TEXTURE10_ARB 0x84CA
+#define GL_TEXTURE11_ARB 0x84CB
+#define GL_TEXTURE12_ARB 0x84CC
+#define GL_TEXTURE13_ARB 0x84CD
+#define GL_TEXTURE14_ARB 0x84CE
+#define GL_TEXTURE15_ARB 0x84CF
+#define GL_TEXTURE16_ARB 0x84D0
+#define GL_TEXTURE17_ARB 0x84D1
+#define GL_TEXTURE18_ARB 0x84D2
+#define GL_TEXTURE19_ARB 0x84D3
+#define GL_TEXTURE20_ARB 0x84D4
+#define GL_TEXTURE21_ARB 0x84D5
+#define GL_TEXTURE22_ARB 0x84D6
+#define GL_TEXTURE23_ARB 0x84D7
+#define GL_TEXTURE24_ARB 0x84D8
+#define GL_TEXTURE25_ARB 0x84D9
+#define GL_TEXTURE26_ARB 0x84DA
+#define GL_TEXTURE27_ARB 0x84DB
+#define GL_TEXTURE28_ARB 0x84DC
+#define GL_TEXTURE29_ARB 0x84DD
+#define GL_TEXTURE30_ARB 0x84DE
+#define GL_TEXTURE31_ARB 0x84DF
+#define GL_ACTIVE_TEXTURE_ARB 0x84E0
+#define GL_CLIENT_ACTIVE_TEXTURE_ARB 0x84E1
+#define GL_MAX_TEXTURE_UNITS_ARB 0x84E2
+#endif
+
+#ifndef GL_ARB_transpose_matrix
+#define GL_TRANSPOSE_MODELVIEW_MATRIX_ARB 0x84E3
+#define GL_TRANSPOSE_PROJECTION_MATRIX_ARB 0x84E4
+#define GL_TRANSPOSE_TEXTURE_MATRIX_ARB 0x84E5
+#define GL_TRANSPOSE_COLOR_MATRIX_ARB 0x84E6
+#endif
+
+#ifndef GL_ARB_multisample
+#define GL_MULTISAMPLE_ARB 0x809D
+#define GL_SAMPLE_ALPHA_TO_COVERAGE_ARB 0x809E
+#define GL_SAMPLE_ALPHA_TO_ONE_ARB 0x809F
+#define GL_SAMPLE_COVERAGE_ARB 0x80A0
+#define GL_SAMPLE_BUFFERS_ARB 0x80A8
+#define GL_SAMPLES_ARB 0x80A9
+#define GL_SAMPLE_COVERAGE_VALUE_ARB 0x80AA
+#define GL_SAMPLE_COVERAGE_INVERT_ARB 0x80AB
+#define GL_MULTISAMPLE_BIT_ARB 0x20000000
+#endif
+
+#ifndef GL_ARB_texture_env_add
+#endif
+
+#ifndef GL_ARB_texture_cube_map
+#define GL_NORMAL_MAP_ARB 0x8511
+#define GL_REFLECTION_MAP_ARB 0x8512
+#define GL_TEXTURE_CUBE_MAP_ARB 0x8513
+#define GL_TEXTURE_BINDING_CUBE_MAP_ARB 0x8514
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x8515
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x8516
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x8517
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x8518
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x8519
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x851A
+#define GL_PROXY_TEXTURE_CUBE_MAP_ARB 0x851B
+#define GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB 0x851C
+#endif
+
+#ifndef GL_ARB_texture_compression
+#define GL_COMPRESSED_ALPHA_ARB 0x84E9
+#define GL_COMPRESSED_LUMINANCE_ARB 0x84EA
+#define GL_COMPRESSED_LUMINANCE_ALPHA_ARB 0x84EB
+#define GL_COMPRESSED_INTENSITY_ARB 0x84EC
+#define GL_COMPRESSED_RGB_ARB 0x84ED
+#define GL_COMPRESSED_RGBA_ARB 0x84EE
+#define GL_TEXTURE_COMPRESSION_HINT_ARB 0x84EF
+#define GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB 0x86A0
+#define GL_TEXTURE_COMPRESSED_ARB 0x86A1
+#define GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB 0x86A2
+#define GL_COMPRESSED_TEXTURE_FORMATS_ARB 0x86A3
+#endif
+
+#ifndef GL_ARB_texture_border_clamp
+#define GL_CLAMP_TO_BORDER_ARB 0x812D
+#endif
+
+#ifndef GL_ARB_point_parameters
+#define GL_POINT_SIZE_MIN_ARB 0x8126
+#define GL_POINT_SIZE_MAX_ARB 0x8127
+#define GL_POINT_FADE_THRESHOLD_SIZE_ARB 0x8128
+#define GL_POINT_DISTANCE_ATTENUATION_ARB 0x8129
+#endif
+
+#ifndef GL_ARB_vertex_blend
+#define GL_MAX_VERTEX_UNITS_ARB 0x86A4
+#define GL_ACTIVE_VERTEX_UNITS_ARB 0x86A5
+#define GL_WEIGHT_SUM_UNITY_ARB 0x86A6
+#define GL_VERTEX_BLEND_ARB 0x86A7
+#define GL_CURRENT_WEIGHT_ARB 0x86A8
+#define GL_WEIGHT_ARRAY_TYPE_ARB 0x86A9
+#define GL_WEIGHT_ARRAY_STRIDE_ARB 0x86AA
+#define GL_WEIGHT_ARRAY_SIZE_ARB 0x86AB
+#define GL_WEIGHT_ARRAY_POINTER_ARB 0x86AC
+#define GL_WEIGHT_ARRAY_ARB 0x86AD
+#define GL_MODELVIEW0_ARB 0x1700
+#define GL_MODELVIEW1_ARB 0x850A
+#define GL_MODELVIEW2_ARB 0x8722
+#define GL_MODELVIEW3_ARB 0x8723
+#define GL_MODELVIEW4_ARB 0x8724
+#define GL_MODELVIEW5_ARB 0x8725
+#define GL_MODELVIEW6_ARB 0x8726
+#define GL_MODELVIEW7_ARB 0x8727
+#define GL_MODELVIEW8_ARB 0x8728
+#define GL_MODELVIEW9_ARB 0x8729
+#define GL_MODELVIEW10_ARB 0x872A
+#define GL_MODELVIEW11_ARB 0x872B
+#define GL_MODELVIEW12_ARB 0x872C
+#define GL_MODELVIEW13_ARB 0x872D
+#define GL_MODELVIEW14_ARB 0x872E
+#define GL_MODELVIEW15_ARB 0x872F
+#define GL_MODELVIEW16_ARB 0x8730
+#define GL_MODELVIEW17_ARB 0x8731
+#define GL_MODELVIEW18_ARB 0x8732
+#define GL_MODELVIEW19_ARB 0x8733
+#define GL_MODELVIEW20_ARB 0x8734
+#define GL_MODELVIEW21_ARB 0x8735
+#define GL_MODELVIEW22_ARB 0x8736
+#define GL_MODELVIEW23_ARB 0x8737
+#define GL_MODELVIEW24_ARB 0x8738
+#define GL_MODELVIEW25_ARB 0x8739
+#define GL_MODELVIEW26_ARB 0x873A
+#define GL_MODELVIEW27_ARB 0x873B
+#define GL_MODELVIEW28_ARB 0x873C
+#define GL_MODELVIEW29_ARB 0x873D
+#define GL_MODELVIEW30_ARB 0x873E
+#define GL_MODELVIEW31_ARB 0x873F
+#endif
+
+#ifndef GL_ARB_matrix_palette
+#define GL_MATRIX_PALETTE_ARB 0x8840
+#define GL_MAX_MATRIX_PALETTE_STACK_DEPTH_ARB 0x8841
+#define GL_MAX_PALETTE_MATRICES_ARB 0x8842
+#define GL_CURRENT_PALETTE_MATRIX_ARB 0x8843
+#define GL_MATRIX_INDEX_ARRAY_ARB 0x8844
+#define GL_CURRENT_MATRIX_INDEX_ARB 0x8845
+#define GL_MATRIX_INDEX_ARRAY_SIZE_ARB 0x8846
+#define GL_MATRIX_INDEX_ARRAY_TYPE_ARB 0x8847
+#define GL_MATRIX_INDEX_ARRAY_STRIDE_ARB 0x8848
+#define GL_MATRIX_INDEX_ARRAY_POINTER_ARB 0x8849
+#endif
+
+#ifndef GL_ARB_texture_env_combine
+#define GL_COMBINE_ARB 0x8570
+#define GL_COMBINE_RGB_ARB 0x8571
+#define GL_COMBINE_ALPHA_ARB 0x8572
+#define GL_SOURCE0_RGB_ARB 0x8580
+#define GL_SOURCE1_RGB_ARB 0x8581
+#define GL_SOURCE2_RGB_ARB 0x8582
+#define GL_SOURCE0_ALPHA_ARB 0x8588
+#define GL_SOURCE1_ALPHA_ARB 0x8589
+#define GL_SOURCE2_ALPHA_ARB 0x858A
+#define GL_OPERAND0_RGB_ARB 0x8590
+#define GL_OPERAND1_RGB_ARB 0x8591
+#define GL_OPERAND2_RGB_ARB 0x8592
+#define GL_OPERAND0_ALPHA_ARB 0x8598
+#define GL_OPERAND1_ALPHA_ARB 0x8599
+#define GL_OPERAND2_ALPHA_ARB 0x859A
+#define GL_RGB_SCALE_ARB 0x8573
+#define GL_ADD_SIGNED_ARB 0x8574
+#define GL_INTERPOLATE_ARB 0x8575
+#define GL_SUBTRACT_ARB 0x84E7
+#define GL_CONSTANT_ARB 0x8576
+#define GL_PRIMARY_COLOR_ARB 0x8577
+#define GL_PREVIOUS_ARB 0x8578
+#endif
+
+#ifndef GL_ARB_texture_env_crossbar
+#endif
+
+#ifndef GL_ARB_texture_env_dot3
+#define GL_DOT3_RGB_ARB 0x86AE
+#define GL_DOT3_RGBA_ARB 0x86AF
+#endif
+
+#ifndef GL_ARB_texture_mirrored_repeat
+#define GL_MIRRORED_REPEAT_ARB 0x8370
+#endif
+
+#ifndef GL_ARB_depth_texture
+#define GL_DEPTH_COMPONENT16_ARB 0x81A5
+#define GL_DEPTH_COMPONENT24_ARB 0x81A6
+#define GL_DEPTH_COMPONENT32_ARB 0x81A7
+#define GL_TEXTURE_DEPTH_SIZE_ARB 0x884A
+#define GL_DEPTH_TEXTURE_MODE_ARB 0x884B
+#endif
+
+#ifndef GL_ARB_shadow
+#define GL_TEXTURE_COMPARE_MODE_ARB 0x884C
+#define GL_TEXTURE_COMPARE_FUNC_ARB 0x884D
+#define GL_COMPARE_R_TO_TEXTURE_ARB 0x884E
+#endif
+
+#ifndef GL_ARB_shadow_ambient
+#define GL_TEXTURE_COMPARE_FAIL_VALUE_ARB 0x80BF
+#endif
+
+#ifndef GL_ARB_window_pos
+#endif
+
+#ifndef GL_ARB_vertex_program
+#define GL_COLOR_SUM_ARB 0x8458
+#define GL_VERTEX_PROGRAM_ARB 0x8620
+#define GL_VERTEX_ATTRIB_ARRAY_ENABLED_ARB 0x8622
+#define GL_VERTEX_ATTRIB_ARRAY_SIZE_ARB 0x8623
+#define GL_VERTEX_ATTRIB_ARRAY_STRIDE_ARB 0x8624
+#define GL_VERTEX_ATTRIB_ARRAY_TYPE_ARB 0x8625
+#define GL_CURRENT_VERTEX_ATTRIB_ARB 0x8626
+#define GL_PROGRAM_LENGTH_ARB 0x8627
+#define GL_PROGRAM_STRING_ARB 0x8628
+#define GL_MAX_PROGRAM_MATRIX_STACK_DEPTH_ARB 0x862E
+#define GL_MAX_PROGRAM_MATRICES_ARB 0x862F
+#define GL_CURRENT_MATRIX_STACK_DEPTH_ARB 0x8640
+#define GL_CURRENT_MATRIX_ARB 0x8641
+#define GL_VERTEX_PROGRAM_POINT_SIZE_ARB 0x8642
+#define GL_VERTEX_PROGRAM_TWO_SIDE_ARB 0x8643
+#define GL_VERTEX_ATTRIB_ARRAY_POINTER_ARB 0x8645
+#define GL_PROGRAM_ERROR_POSITION_ARB 0x864B
+#define GL_PROGRAM_BINDING_ARB 0x8677
+#define GL_MAX_VERTEX_ATTRIBS_ARB 0x8869
+#define GL_VERTEX_ATTRIB_ARRAY_NORMALIZED_ARB 0x886A
+#define GL_PROGRAM_ERROR_STRING_ARB 0x8874
+#define GL_PROGRAM_FORMAT_ASCII_ARB 0x8875
+#define GL_PROGRAM_FORMAT_ARB 0x8876
+#define GL_PROGRAM_INSTRUCTIONS_ARB 0x88A0
+#define GL_MAX_PROGRAM_INSTRUCTIONS_ARB 0x88A1
+#define GL_PROGRAM_NATIVE_INSTRUCTIONS_ARB 0x88A2
+#define GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB 0x88A3
+#define GL_PROGRAM_TEMPORARIES_ARB 0x88A4
+#define GL_MAX_PROGRAM_TEMPORARIES_ARB 0x88A5
+#define GL_PROGRAM_NATIVE_TEMPORARIES_ARB 0x88A6
+#define GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB 0x88A7
+#define GL_PROGRAM_PARAMETERS_ARB 0x88A8
+#define GL_MAX_PROGRAM_PARAMETERS_ARB 0x88A9
+#define GL_PROGRAM_NATIVE_PARAMETERS_ARB 0x88AA
+#define GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB 0x88AB
+#define GL_PROGRAM_ATTRIBS_ARB 0x88AC
+#define GL_MAX_PROGRAM_ATTRIBS_ARB 0x88AD
+#define GL_PROGRAM_NATIVE_ATTRIBS_ARB 0x88AE
+#define GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB 0x88AF
+#define GL_PROGRAM_ADDRESS_REGISTERS_ARB 0x88B0
+#define GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB 0x88B1
+#define GL_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB 0x88B2
+#define GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB 0x88B3
+#define GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB 0x88B4
+#define GL_MAX_PROGRAM_ENV_PARAMETERS_ARB 0x88B5
+#define GL_PROGRAM_UNDER_NATIVE_LIMITS_ARB 0x88B6
+#define GL_TRANSPOSE_CURRENT_MATRIX_ARB 0x88B7
+#define GL_MATRIX0_ARB 0x88C0
+#define GL_MATRIX1_ARB 0x88C1
+#define GL_MATRIX2_ARB 0x88C2
+#define GL_MATRIX3_ARB 0x88C3
+#define GL_MATRIX4_ARB 0x88C4
+#define GL_MATRIX5_ARB 0x88C5
+#define GL_MATRIX6_ARB 0x88C6
+#define GL_MATRIX7_ARB 0x88C7
+#define GL_MATRIX8_ARB 0x88C8
+#define GL_MATRIX9_ARB 0x88C9
+#define GL_MATRIX10_ARB 0x88CA
+#define GL_MATRIX11_ARB 0x88CB
+#define GL_MATRIX12_ARB 0x88CC
+#define GL_MATRIX13_ARB 0x88CD
+#define GL_MATRIX14_ARB 0x88CE
+#define GL_MATRIX15_ARB 0x88CF
+#define GL_MATRIX16_ARB 0x88D0
+#define GL_MATRIX17_ARB 0x88D1
+#define GL_MATRIX18_ARB 0x88D2
+#define GL_MATRIX19_ARB 0x88D3
+#define GL_MATRIX20_ARB 0x88D4
+#define GL_MATRIX21_ARB 0x88D5
+#define GL_MATRIX22_ARB 0x88D6
+#define GL_MATRIX23_ARB 0x88D7
+#define GL_MATRIX24_ARB 0x88D8
+#define GL_MATRIX25_ARB 0x88D9
+#define GL_MATRIX26_ARB 0x88DA
+#define GL_MATRIX27_ARB 0x88DB
+#define GL_MATRIX28_ARB 0x88DC
+#define GL_MATRIX29_ARB 0x88DD
+#define GL_MATRIX30_ARB 0x88DE
+#define GL_MATRIX31_ARB 0x88DF
+#endif
+
+#ifndef GL_ARB_fragment_program
+#define GL_FRAGMENT_PROGRAM_ARB 0x8804
+#define GL_PROGRAM_ALU_INSTRUCTIONS_ARB 0x8805
+#define GL_PROGRAM_TEX_INSTRUCTIONS_ARB 0x8806
+#define GL_PROGRAM_TEX_INDIRECTIONS_ARB 0x8807
+#define GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB 0x8808
+#define GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB 0x8809
+#define GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB 0x880A
+#define GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB 0x880B
+#define GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB 0x880C
+#define GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB 0x880D
+#define GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB 0x880E
+#define GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB 0x880F
+#define GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB 0x8810
+#define GL_MAX_TEXTURE_COORDS_ARB 0x8871
+#define GL_MAX_TEXTURE_IMAGE_UNITS_ARB 0x8872
+#endif
+
+#ifndef GL_ARB_vertex_buffer_object
+#define GL_BUFFER_SIZE_ARB 0x8764
+#define GL_BUFFER_USAGE_ARB 0x8765
+#define GL_ARRAY_BUFFER_ARB 0x8892
+#define GL_ELEMENT_ARRAY_BUFFER_ARB 0x8893
+#define GL_ARRAY_BUFFER_BINDING_ARB 0x8894
+#define GL_ELEMENT_ARRAY_BUFFER_BINDING_ARB 0x8895
+#define GL_VERTEX_ARRAY_BUFFER_BINDING_ARB 0x8896
+#define GL_NORMAL_ARRAY_BUFFER_BINDING_ARB 0x8897
+#define GL_COLOR_ARRAY_BUFFER_BINDING_ARB 0x8898
+#define GL_INDEX_ARRAY_BUFFER_BINDING_ARB 0x8899
+#define GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING_ARB 0x889A
+#define GL_EDGE_FLAG_ARRAY_BUFFER_BINDING_ARB 0x889B
+#define GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING_ARB 0x889C
+#define GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING_ARB 0x889D
+#define GL_WEIGHT_ARRAY_BUFFER_BINDING_ARB 0x889E
+#define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ARB 0x889F
+#define GL_READ_ONLY_ARB 0x88B8
+#define GL_WRITE_ONLY_ARB 0x88B9
+#define GL_READ_WRITE_ARB 0x88BA
+#define GL_BUFFER_ACCESS_ARB 0x88BB
+#define GL_BUFFER_MAPPED_ARB 0x88BC
+#define GL_BUFFER_MAP_POINTER_ARB 0x88BD
+#define GL_STREAM_DRAW_ARB 0x88E0
+#define GL_STREAM_READ_ARB 0x88E1
+#define GL_STREAM_COPY_ARB 0x88E2
+#define GL_STATIC_DRAW_ARB 0x88E4
+#define GL_STATIC_READ_ARB 0x88E5
+#define GL_STATIC_COPY_ARB 0x88E6
+#define GL_DYNAMIC_DRAW_ARB 0x88E8
+#define GL_DYNAMIC_READ_ARB 0x88E9
+#define GL_DYNAMIC_COPY_ARB 0x88EA
+#endif
+
+#ifndef GL_ARB_occlusion_query
+#define GL_QUERY_COUNTER_BITS_ARB 0x8864
+#define GL_CURRENT_QUERY_ARB 0x8865
+#define GL_QUERY_RESULT_ARB 0x8866
+#define GL_QUERY_RESULT_AVAILABLE_ARB 0x8867
+#define GL_SAMPLES_PASSED_ARB 0x8914
+#endif
+
+#ifndef GL_ARB_shader_objects
+#define GL_PROGRAM_OBJECT_ARB 0x8B40
+#define GL_SHADER_OBJECT_ARB 0x8B48
+#define GL_OBJECT_TYPE_ARB 0x8B4E
+#define GL_OBJECT_SUBTYPE_ARB 0x8B4F
+#define GL_FLOAT_VEC2_ARB 0x8B50
+#define GL_FLOAT_VEC3_ARB 0x8B51
+#define GL_FLOAT_VEC4_ARB 0x8B52
+#define GL_INT_VEC2_ARB 0x8B53
+#define GL_INT_VEC3_ARB 0x8B54
+#define GL_INT_VEC4_ARB 0x8B55
+#define GL_BOOL_ARB 0x8B56
+#define GL_BOOL_VEC2_ARB 0x8B57
+#define GL_BOOL_VEC3_ARB 0x8B58
+#define GL_BOOL_VEC4_ARB 0x8B59
+#define GL_FLOAT_MAT2_ARB 0x8B5A
+#define GL_FLOAT_MAT3_ARB 0x8B5B
+#define GL_FLOAT_MAT4_ARB 0x8B5C
+#define GL_SAMPLER_1D_ARB 0x8B5D
+#define GL_SAMPLER_2D_ARB 0x8B5E
+#define GL_SAMPLER_3D_ARB 0x8B5F
+#define GL_SAMPLER_CUBE_ARB 0x8B60
+#define GL_SAMPLER_1D_SHADOW_ARB 0x8B61
+#define GL_SAMPLER_2D_SHADOW_ARB 0x8B62
+#define GL_SAMPLER_2D_RECT_ARB 0x8B63
+#define GL_SAMPLER_2D_RECT_SHADOW_ARB 0x8B64
+#define GL_OBJECT_DELETE_STATUS_ARB 0x8B80
+#define GL_OBJECT_COMPILE_STATUS_ARB 0x8B81
+#define GL_OBJECT_LINK_STATUS_ARB 0x8B82
+#define GL_OBJECT_VALIDATE_STATUS_ARB 0x8B83
+#define GL_OBJECT_INFO_LOG_LENGTH_ARB 0x8B84
+#define GL_OBJECT_ATTACHED_OBJECTS_ARB 0x8B85
+#define GL_OBJECT_ACTIVE_UNIFORMS_ARB 0x8B86
+#define GL_OBJECT_ACTIVE_UNIFORM_MAX_LENGTH_ARB 0x8B87
+#define GL_OBJECT_SHADER_SOURCE_LENGTH_ARB 0x8B88
+#endif
+
+#ifndef GL_ARB_vertex_shader
+#define GL_VERTEX_SHADER_ARB 0x8B31
+#define GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB 0x8B4A
+#define GL_MAX_VARYING_FLOATS_ARB 0x8B4B
+#define GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB 0x8B4C
+#define GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB 0x8B4D
+#define GL_OBJECT_ACTIVE_ATTRIBUTES_ARB 0x8B89
+#define GL_OBJECT_ACTIVE_ATTRIBUTE_MAX_LENGTH_ARB 0x8B8A
+#endif
+
+#ifndef GL_ARB_fragment_shader
+#define GL_FRAGMENT_SHADER_ARB 0x8B30
+#define GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB 0x8B49
+#define GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB 0x8B8B
+#endif
+
+#ifndef GL_ARB_shading_language_100
+#define GL_SHADING_LANGUAGE_VERSION_ARB 0x8B8C
+#endif
+
+#ifndef GL_ARB_texture_non_power_of_two
+#endif
+
+#ifndef GL_ARB_point_sprite
+#define GL_POINT_SPRITE_ARB 0x8861
+#define GL_COORD_REPLACE_ARB 0x8862
+#endif
+
+#ifndef GL_ARB_fragment_program_shadow
+#endif
+
+#ifndef GL_ARB_draw_buffers
+#define GL_MAX_DRAW_BUFFERS_ARB 0x8824
+#define GL_DRAW_BUFFER0_ARB 0x8825
+#define GL_DRAW_BUFFER1_ARB 0x8826
+#define GL_DRAW_BUFFER2_ARB 0x8827
+#define GL_DRAW_BUFFER3_ARB 0x8828
+#define GL_DRAW_BUFFER4_ARB 0x8829
+#define GL_DRAW_BUFFER5_ARB 0x882A
+#define GL_DRAW_BUFFER6_ARB 0x882B
+#define GL_DRAW_BUFFER7_ARB 0x882C
+#define GL_DRAW_BUFFER8_ARB 0x882D
+#define GL_DRAW_BUFFER9_ARB 0x882E
+#define GL_DRAW_BUFFER10_ARB 0x882F
+#define GL_DRAW_BUFFER11_ARB 0x8830
+#define GL_DRAW_BUFFER12_ARB 0x8831
+#define GL_DRAW_BUFFER13_ARB 0x8832
+#define GL_DRAW_BUFFER14_ARB 0x8833
+#define GL_DRAW_BUFFER15_ARB 0x8834
+#endif
+
+#ifndef GL_ARB_texture_rectangle
+#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
+#define GL_TEXTURE_BINDING_RECTANGLE_ARB 0x84F6
+#define GL_PROXY_TEXTURE_RECTANGLE_ARB 0x84F7
+#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8
+#endif
+
+#ifndef GL_ARB_color_buffer_float
+#define GL_RGBA_FLOAT_MODE_ARB 0x8820
+#define GL_CLAMP_VERTEX_COLOR_ARB 0x891A
+#define GL_CLAMP_FRAGMENT_COLOR_ARB 0x891B
+#define GL_CLAMP_READ_COLOR_ARB 0x891C
+#define GL_FIXED_ONLY_ARB 0x891D
+#endif
+
+#ifndef GL_ARB_half_float_pixel
+#define GL_HALF_FLOAT_ARB 0x140B
+#endif
+
+#ifndef GL_ARB_texture_float
+#define GL_TEXTURE_RED_TYPE_ARB 0x8C10
+#define GL_TEXTURE_GREEN_TYPE_ARB 0x8C11
+#define GL_TEXTURE_BLUE_TYPE_ARB 0x8C12
+#define GL_TEXTURE_ALPHA_TYPE_ARB 0x8C13
+#define GL_TEXTURE_LUMINANCE_TYPE_ARB 0x8C14
+#define GL_TEXTURE_INTENSITY_TYPE_ARB 0x8C15
+#define GL_TEXTURE_DEPTH_TYPE_ARB 0x8C16
+#define GL_UNSIGNED_NORMALIZED_ARB 0x8C17
+#define GL_RGBA32F_ARB 0x8814
+#define GL_RGB32F_ARB 0x8815
+#define GL_ALPHA32F_ARB 0x8816
+#define GL_INTENSITY32F_ARB 0x8817
+#define GL_LUMINANCE32F_ARB 0x8818
+#define GL_LUMINANCE_ALPHA32F_ARB 0x8819
+#define GL_RGBA16F_ARB 0x881A
+#define GL_RGB16F_ARB 0x881B
+#define GL_ALPHA16F_ARB 0x881C
+#define GL_INTENSITY16F_ARB 0x881D
+#define GL_LUMINANCE16F_ARB 0x881E
+#define GL_LUMINANCE_ALPHA16F_ARB 0x881F
+#endif
+
+#ifndef GL_ARB_pixel_buffer_object
+#define GL_PIXEL_PACK_BUFFER_ARB 0x88EB
+#define GL_PIXEL_UNPACK_BUFFER_ARB 0x88EC
+#define GL_PIXEL_PACK_BUFFER_BINDING_ARB 0x88ED
+#define GL_PIXEL_UNPACK_BUFFER_BINDING_ARB 0x88EF
+#endif
+
+#ifndef GL_ARB_depth_buffer_float
+#define GL_DEPTH_COMPONENT32F 0x8CAC
+#define GL_DEPTH32F_STENCIL8 0x8CAD
+#define GL_FLOAT_32_UNSIGNED_INT_24_8_REV 0x8DAD
+#endif
+
+#ifndef GL_ARB_draw_instanced
+#endif
+
+#ifndef GL_ARB_framebuffer_object
+#define GL_INVALID_FRAMEBUFFER_OPERATION 0x0506
+#define GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING 0x8210
+#define GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE 0x8211
+#define GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE 0x8212
+#define GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE 0x8213
+#define GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE 0x8214
+#define GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE 0x8215
+#define GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE 0x8216
+#define GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE 0x8217
+#define GL_FRAMEBUFFER_DEFAULT 0x8218
+#define GL_FRAMEBUFFER_UNDEFINED 0x8219
+#define GL_DEPTH_STENCIL_ATTACHMENT 0x821A
+#define GL_MAX_RENDERBUFFER_SIZE 0x84E8
+#define GL_DEPTH_STENCIL 0x84F9
+#define GL_UNSIGNED_INT_24_8 0x84FA
+#define GL_DEPTH24_STENCIL8 0x88F0
+#define GL_TEXTURE_STENCIL_SIZE 0x88F1
+#define GL_TEXTURE_RED_TYPE 0x8C10
+#define GL_TEXTURE_GREEN_TYPE 0x8C11
+#define GL_TEXTURE_BLUE_TYPE 0x8C12
+#define GL_TEXTURE_ALPHA_TYPE 0x8C13
+#define GL_TEXTURE_DEPTH_TYPE 0x8C16
+#define GL_UNSIGNED_NORMALIZED 0x8C17
+#define GL_FRAMEBUFFER_BINDING 0x8CA6
+#define GL_DRAW_FRAMEBUFFER_BINDING GL_FRAMEBUFFER_BINDING
+#define GL_RENDERBUFFER_BINDING 0x8CA7
+#define GL_READ_FRAMEBUFFER 0x8CA8
+#define GL_DRAW_FRAMEBUFFER 0x8CA9
+#define GL_READ_FRAMEBUFFER_BINDING 0x8CAA
+#define GL_RENDERBUFFER_SAMPLES 0x8CAB
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE 0x8CD0
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME 0x8CD1
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL 0x8CD2
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE 0x8CD3
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER 0x8CD4
+#define GL_FRAMEBUFFER_COMPLETE 0x8CD5
+#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT 0x8CD6
+#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT 0x8CD7
+#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER 0x8CDB
+#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER 0x8CDC
+#define GL_FRAMEBUFFER_UNSUPPORTED 0x8CDD
+#define GL_MAX_COLOR_ATTACHMENTS 0x8CDF
+#define GL_COLOR_ATTACHMENT0 0x8CE0
+#define GL_COLOR_ATTACHMENT1 0x8CE1
+#define GL_COLOR_ATTACHMENT2 0x8CE2
+#define GL_COLOR_ATTACHMENT3 0x8CE3
+#define GL_COLOR_ATTACHMENT4 0x8CE4
+#define GL_COLOR_ATTACHMENT5 0x8CE5
+#define GL_COLOR_ATTACHMENT6 0x8CE6
+#define GL_COLOR_ATTACHMENT7 0x8CE7
+#define GL_COLOR_ATTACHMENT8 0x8CE8
+#define GL_COLOR_ATTACHMENT9 0x8CE9
+#define GL_COLOR_ATTACHMENT10 0x8CEA
+#define GL_COLOR_ATTACHMENT11 0x8CEB
+#define GL_COLOR_ATTACHMENT12 0x8CEC
+#define GL_COLOR_ATTACHMENT13 0x8CED
+#define GL_COLOR_ATTACHMENT14 0x8CEE
+#define GL_COLOR_ATTACHMENT15 0x8CEF
+#define GL_DEPTH_ATTACHMENT 0x8D00
+#define GL_STENCIL_ATTACHMENT 0x8D20
+#define GL_FRAMEBUFFER 0x8D40
+#define GL_RENDERBUFFER 0x8D41
+#define GL_RENDERBUFFER_WIDTH 0x8D42
+#define GL_RENDERBUFFER_HEIGHT 0x8D43
+#define GL_RENDERBUFFER_INTERNAL_FORMAT 0x8D44
+#define GL_STENCIL_INDEX1 0x8D46
+#define GL_STENCIL_INDEX4 0x8D47
+#define GL_STENCIL_INDEX8 0x8D48
+#define GL_STENCIL_INDEX16 0x8D49
+#define GL_RENDERBUFFER_RED_SIZE 0x8D50
+#define GL_RENDERBUFFER_GREEN_SIZE 0x8D51
+#define GL_RENDERBUFFER_BLUE_SIZE 0x8D52
+#define GL_RENDERBUFFER_ALPHA_SIZE 0x8D53
+#define GL_RENDERBUFFER_DEPTH_SIZE 0x8D54
+#define GL_RENDERBUFFER_STENCIL_SIZE 0x8D55
+#define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE 0x8D56
+#define GL_MAX_SAMPLES 0x8D57
+#endif
+
+#ifndef GL_ARB_framebuffer_object_DEPRECATED
+#define GL_INDEX 0x8222
+#define GL_TEXTURE_LUMINANCE_TYPE 0x8C14
+#define GL_TEXTURE_INTENSITY_TYPE 0x8C15
+#endif
+
+#ifndef GL_ARB_framebuffer_sRGB
+#define GL_FRAMEBUFFER_SRGB 0x8DB9
+#endif
+
+#ifndef GL_ARB_geometry_shader4
+#define GL_LINES_ADJACENCY_ARB 0x000A
+#define GL_LINE_STRIP_ADJACENCY_ARB 0x000B
+#define GL_TRIANGLES_ADJACENCY_ARB 0x000C
+#define GL_TRIANGLE_STRIP_ADJACENCY_ARB 0x000D
+#define GL_PROGRAM_POINT_SIZE_ARB 0x8642
+#define GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_ARB 0x8C29
+#define GL_FRAMEBUFFER_ATTACHMENT_LAYERED_ARB 0x8DA7
+#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_ARB 0x8DA8
+#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_ARB 0x8DA9
+#define GL_GEOMETRY_SHADER_ARB 0x8DD9
+#define GL_GEOMETRY_VERTICES_OUT_ARB 0x8DDA
+#define GL_GEOMETRY_INPUT_TYPE_ARB 0x8DDB
+#define GL_GEOMETRY_OUTPUT_TYPE_ARB 0x8DDC
+#define GL_MAX_GEOMETRY_VARYING_COMPONENTS_ARB 0x8DDD
+#define GL_MAX_VERTEX_VARYING_COMPONENTS_ARB 0x8DDE
+#define GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_ARB 0x8DDF
+#define GL_MAX_GEOMETRY_OUTPUT_VERTICES_ARB 0x8DE0
+#define GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_ARB 0x8DE1
+/* reuse GL_MAX_VARYING_COMPONENTS */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER */
+#endif
+
+#ifndef GL_ARB_half_float_vertex
+#define GL_HALF_FLOAT 0x140B
+#endif
+
+#ifndef GL_ARB_instanced_arrays
+#define GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0x88FE
+#endif
+
+#ifndef GL_ARB_map_buffer_range
+#define GL_MAP_READ_BIT 0x0001
+#define GL_MAP_WRITE_BIT 0x0002
+#define GL_MAP_INVALIDATE_RANGE_BIT 0x0004
+#define GL_MAP_INVALIDATE_BUFFER_BIT 0x0008
+#define GL_MAP_FLUSH_EXPLICIT_BIT 0x0010
+#define GL_MAP_UNSYNCHRONIZED_BIT 0x0020
+#endif
+
+#ifndef GL_ARB_texture_buffer_object
+#define GL_TEXTURE_BUFFER_ARB 0x8C2A
+#define GL_MAX_TEXTURE_BUFFER_SIZE_ARB 0x8C2B
+#define GL_TEXTURE_BINDING_BUFFER_ARB 0x8C2C
+#define GL_TEXTURE_BUFFER_DATA_STORE_BINDING_ARB 0x8C2D
+#define GL_TEXTURE_BUFFER_FORMAT_ARB 0x8C2E
+#endif
+
+#ifndef GL_ARB_texture_compression_rgtc
+#define GL_COMPRESSED_RED_RGTC1 0x8DBB
+#define GL_COMPRESSED_SIGNED_RED_RGTC1 0x8DBC
+#define GL_COMPRESSED_RG_RGTC2 0x8DBD
+#define GL_COMPRESSED_SIGNED_RG_RGTC2 0x8DBE
+#endif
+
+#ifndef GL_ARB_texture_rg
+#define GL_RG 0x8227
+#define GL_RG_INTEGER 0x8228
+#define GL_R8 0x8229
+#define GL_R16 0x822A
+#define GL_RG8 0x822B
+#define GL_RG16 0x822C
+#define GL_R16F 0x822D
+#define GL_R32F 0x822E
+#define GL_RG16F 0x822F
+#define GL_RG32F 0x8230
+#define GL_R8I 0x8231
+#define GL_R8UI 0x8232
+#define GL_R16I 0x8233
+#define GL_R16UI 0x8234
+#define GL_R32I 0x8235
+#define GL_R32UI 0x8236
+#define GL_RG8I 0x8237
+#define GL_RG8UI 0x8238
+#define GL_RG16I 0x8239
+#define GL_RG16UI 0x823A
+#define GL_RG32I 0x823B
+#define GL_RG32UI 0x823C
+#endif
+
+#ifndef GL_ARB_vertex_array_object
+#define GL_VERTEX_ARRAY_BINDING 0x85B5
+#endif
+
+#ifndef GL_ARB_uniform_buffer_object
+#define GL_UNIFORM_BUFFER 0x8A11
+#define GL_UNIFORM_BUFFER_BINDING 0x8A28
+#define GL_UNIFORM_BUFFER_START 0x8A29
+#define GL_UNIFORM_BUFFER_SIZE 0x8A2A
+#define GL_MAX_VERTEX_UNIFORM_BLOCKS 0x8A2B
+#define GL_MAX_GEOMETRY_UNIFORM_BLOCKS 0x8A2C
+#define GL_MAX_FRAGMENT_UNIFORM_BLOCKS 0x8A2D
+#define GL_MAX_COMBINED_UNIFORM_BLOCKS 0x8A2E
+#define GL_MAX_UNIFORM_BUFFER_BINDINGS 0x8A2F
+#define GL_MAX_UNIFORM_BLOCK_SIZE 0x8A30
+#define GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS 0x8A31
+#define GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS 0x8A32
+#define GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS 0x8A33
+#define GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT 0x8A34
+#define GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH 0x8A35
+#define GL_ACTIVE_UNIFORM_BLOCKS 0x8A36
+#define GL_UNIFORM_TYPE 0x8A37
+#define GL_UNIFORM_SIZE 0x8A38
+#define GL_UNIFORM_NAME_LENGTH 0x8A39
+#define GL_UNIFORM_BLOCK_INDEX 0x8A3A
+#define GL_UNIFORM_OFFSET 0x8A3B
+#define GL_UNIFORM_ARRAY_STRIDE 0x8A3C
+#define GL_UNIFORM_MATRIX_STRIDE 0x8A3D
+#define GL_UNIFORM_IS_ROW_MAJOR 0x8A3E
+#define GL_UNIFORM_BLOCK_BINDING 0x8A3F
+#define GL_UNIFORM_BLOCK_DATA_SIZE 0x8A40
+#define GL_UNIFORM_BLOCK_NAME_LENGTH 0x8A41
+#define GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS 0x8A42
+#define GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES 0x8A43
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER 0x8A44
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER 0x8A45
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER 0x8A46
+#define GL_INVALID_INDEX 0xFFFFFFFFu
+#endif
+
+#ifndef GL_ARB_compatibility
+/* ARB_compatibility just defines tokens from core 3.0 */
+#endif
+
+#ifndef GL_ARB_copy_buffer
+#define GL_COPY_READ_BUFFER 0x8F36
+#define GL_COPY_WRITE_BUFFER 0x8F37
+#endif
+
+#ifndef GL_ARB_shader_texture_lod
+#endif
+
+#ifndef GL_ARB_depth_clamp
+#define GL_DEPTH_CLAMP 0x864F
+#endif
+
+#ifndef GL_ARB_draw_elements_base_vertex
+#endif
+
+#ifndef GL_ARB_fragment_coord_conventions
+#endif
+
+#ifndef GL_ARB_provoking_vertex
+#define GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION 0x8E4C
+#define GL_FIRST_VERTEX_CONVENTION 0x8E4D
+#define GL_LAST_VERTEX_CONVENTION 0x8E4E
+#define GL_PROVOKING_VERTEX 0x8E4F
+#endif
+
+#ifndef GL_ARB_seamless_cube_map
+#define GL_TEXTURE_CUBE_MAP_SEAMLESS 0x884F
+#endif
+
+#ifndef GL_ARB_sync
+#define GL_MAX_SERVER_WAIT_TIMEOUT 0x9111
+#define GL_OBJECT_TYPE 0x9112
+#define GL_SYNC_CONDITION 0x9113
+#define GL_SYNC_STATUS 0x9114
+#define GL_SYNC_FLAGS 0x9115
+#define GL_SYNC_FENCE 0x9116
+#define GL_SYNC_GPU_COMMANDS_COMPLETE 0x9117
+#define GL_UNSIGNALED 0x9118
+#define GL_SIGNALED 0x9119
+#define GL_ALREADY_SIGNALED 0x911A
+#define GL_TIMEOUT_EXPIRED 0x911B
+#define GL_CONDITION_SATISFIED 0x911C
+#define GL_WAIT_FAILED 0x911D
+#define GL_SYNC_FLUSH_COMMANDS_BIT 0x00000001
+#define GL_TIMEOUT_IGNORED 0xFFFFFFFFFFFFFFFFull
+#endif
+
+#ifndef GL_ARB_texture_multisample
+#define GL_SAMPLE_POSITION 0x8E50
+#define GL_SAMPLE_MASK 0x8E51
+#define GL_SAMPLE_MASK_VALUE 0x8E52
+#define GL_MAX_SAMPLE_MASK_WORDS 0x8E59
+#define GL_TEXTURE_2D_MULTISAMPLE 0x9100
+#define GL_PROXY_TEXTURE_2D_MULTISAMPLE 0x9101
+#define GL_TEXTURE_2D_MULTISAMPLE_ARRAY 0x9102
+#define GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY 0x9103
+#define GL_TEXTURE_BINDING_2D_MULTISAMPLE 0x9104
+#define GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY 0x9105
+#define GL_TEXTURE_SAMPLES 0x9106
+#define GL_TEXTURE_FIXED_SAMPLE_LOCATIONS 0x9107
+#define GL_SAMPLER_2D_MULTISAMPLE 0x9108
+#define GL_INT_SAMPLER_2D_MULTISAMPLE 0x9109
+#define GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE 0x910A
+#define GL_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910B
+#define GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910C
+#define GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY 0x910D
+#define GL_MAX_COLOR_TEXTURE_SAMPLES 0x910E
+#define GL_MAX_DEPTH_TEXTURE_SAMPLES 0x910F
+#define GL_MAX_INTEGER_SAMPLES 0x9110
+#endif
+
+#ifndef GL_ARB_vertex_array_bgra
+/* reuse GL_BGRA */
+#endif
+
+#ifndef GL_ARB_draw_buffers_blend
+#endif
+
+#ifndef GL_ARB_sample_shading
+#define GL_SAMPLE_SHADING_ARB 0x8C36
+#define GL_MIN_SAMPLE_SHADING_VALUE_ARB 0x8C37
+#endif
+
+#ifndef GL_ARB_texture_cube_map_array
+#define GL_TEXTURE_CUBE_MAP_ARRAY_ARB 0x9009
+#define GL_TEXTURE_BINDING_CUBE_MAP_ARRAY_ARB 0x900A
+#define GL_PROXY_TEXTURE_CUBE_MAP_ARRAY_ARB 0x900B
+#define GL_SAMPLER_CUBE_MAP_ARRAY_ARB 0x900C
+#define GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW_ARB 0x900D
+#define GL_INT_SAMPLER_CUBE_MAP_ARRAY_ARB 0x900E
+#define GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY_ARB 0x900F
+#endif
+
+#ifndef GL_ARB_texture_gather
+#define GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET_ARB 0x8E5E
+#define GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET_ARB 0x8E5F
+#endif
+
+#ifndef GL_ARB_texture_query_lod
+#endif
+
+#ifndef GL_ARB_shading_language_include
+#define GL_SHADER_INCLUDE_ARB 0x8DAE
+#define GL_NAMED_STRING_LENGTH_ARB 0x8DE9
+#define GL_NAMED_STRING_TYPE_ARB 0x8DEA
+#endif
+
+#ifndef GL_ARB_texture_compression_bptc
+#define GL_COMPRESSED_RGBA_BPTC_UNORM_ARB 0x8E8C
+#define GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB 0x8E8D
+#define GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB 0x8E8E
+#define GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB 0x8E8F
+#endif
+
+#ifndef GL_ARB_blend_func_extended
+#define GL_SRC1_COLOR 0x88F9
+/* reuse GL_SRC1_ALPHA */
+#define GL_ONE_MINUS_SRC1_COLOR 0x88FA
+#define GL_ONE_MINUS_SRC1_ALPHA 0x88FB
+#define GL_MAX_DUAL_SOURCE_DRAW_BUFFERS 0x88FC
+#endif
+
+#ifndef GL_ARB_explicit_attrib_location
+#endif
+
+#ifndef GL_ARB_occlusion_query2
+#define GL_ANY_SAMPLES_PASSED 0x8C2F
+#endif
+
+#ifndef GL_ARB_sampler_objects
+#define GL_SAMPLER_BINDING 0x8919
+#endif
+
+#ifndef GL_ARB_shader_bit_encoding
+#endif
+
+#ifndef GL_ARB_texture_rgb10_a2ui
+#define GL_RGB10_A2UI 0x906F
+#endif
+
+#ifndef GL_ARB_texture_swizzle
+#define GL_TEXTURE_SWIZZLE_R 0x8E42
+#define GL_TEXTURE_SWIZZLE_G 0x8E43
+#define GL_TEXTURE_SWIZZLE_B 0x8E44
+#define GL_TEXTURE_SWIZZLE_A 0x8E45
+#define GL_TEXTURE_SWIZZLE_RGBA 0x8E46
+#endif
+
+#ifndef GL_ARB_timer_query
+#define GL_TIME_ELAPSED 0x88BF
+#define GL_TIMESTAMP 0x8E28
+#endif
+
+#ifndef GL_ARB_vertex_type_2_10_10_10_rev
+/* reuse GL_UNSIGNED_INT_2_10_10_10_REV */
+#define GL_INT_2_10_10_10_REV 0x8D9F
+#endif
+
+#ifndef GL_ARB_draw_indirect
+#define GL_DRAW_INDIRECT_BUFFER 0x8F3F
+#define GL_DRAW_INDIRECT_BUFFER_BINDING 0x8F43
+#endif
+
+#ifndef GL_ARB_gpu_shader5
+#define GL_GEOMETRY_SHADER_INVOCATIONS 0x887F
+#define GL_MAX_GEOMETRY_SHADER_INVOCATIONS 0x8E5A
+#define GL_MIN_FRAGMENT_INTERPOLATION_OFFSET 0x8E5B
+#define GL_MAX_FRAGMENT_INTERPOLATION_OFFSET 0x8E5C
+#define GL_FRAGMENT_INTERPOLATION_OFFSET_BITS 0x8E5D
+/* reuse GL_MAX_VERTEX_STREAMS */
+#endif
+
+#ifndef GL_ARB_gpu_shader_fp64
+/* reuse GL_DOUBLE */
+#define GL_DOUBLE_VEC2 0x8FFC
+#define GL_DOUBLE_VEC3 0x8FFD
+#define GL_DOUBLE_VEC4 0x8FFE
+#define GL_DOUBLE_MAT2 0x8F46
+#define GL_DOUBLE_MAT3 0x8F47
+#define GL_DOUBLE_MAT4 0x8F48
+#define GL_DOUBLE_MAT2x3 0x8F49
+#define GL_DOUBLE_MAT2x4 0x8F4A
+#define GL_DOUBLE_MAT3x2 0x8F4B
+#define GL_DOUBLE_MAT3x4 0x8F4C
+#define GL_DOUBLE_MAT4x2 0x8F4D
+#define GL_DOUBLE_MAT4x3 0x8F4E
+#endif
+
+#ifndef GL_ARB_shader_subroutine
+#define GL_ACTIVE_SUBROUTINES 0x8DE5
+#define GL_ACTIVE_SUBROUTINE_UNIFORMS 0x8DE6
+#define GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS 0x8E47
+#define GL_ACTIVE_SUBROUTINE_MAX_LENGTH 0x8E48
+#define GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH 0x8E49
+#define GL_MAX_SUBROUTINES 0x8DE7
+#define GL_MAX_SUBROUTINE_UNIFORM_LOCATIONS 0x8DE8
+#define GL_NUM_COMPATIBLE_SUBROUTINES 0x8E4A
+#define GL_COMPATIBLE_SUBROUTINES 0x8E4B
+/* reuse GL_UNIFORM_SIZE */
+/* reuse GL_UNIFORM_NAME_LENGTH */
+#endif
+
+#ifndef GL_ARB_tessellation_shader
+#define GL_PATCHES 0x000E
+#define GL_PATCH_VERTICES 0x8E72
+#define GL_PATCH_DEFAULT_INNER_LEVEL 0x8E73
+#define GL_PATCH_DEFAULT_OUTER_LEVEL 0x8E74
+#define GL_TESS_CONTROL_OUTPUT_VERTICES 0x8E75
+#define GL_TESS_GEN_MODE 0x8E76
+#define GL_TESS_GEN_SPACING 0x8E77
+#define GL_TESS_GEN_VERTEX_ORDER 0x8E78
+#define GL_TESS_GEN_POINT_MODE 0x8E79
+/* reuse GL_TRIANGLES */
+/* reuse GL_QUADS */
+#define GL_ISOLINES 0x8E7A
+/* reuse GL_EQUAL */
+#define GL_FRACTIONAL_ODD 0x8E7B
+#define GL_FRACTIONAL_EVEN 0x8E7C
+/* reuse GL_CCW */
+/* reuse GL_CW */
+#define GL_MAX_PATCH_VERTICES 0x8E7D
+#define GL_MAX_TESS_GEN_LEVEL 0x8E7E
+#define GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS 0x8E7F
+#define GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS 0x8E80
+#define GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS 0x8E81
+#define GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS 0x8E82
+#define GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS 0x8E83
+#define GL_MAX_TESS_PATCH_COMPONENTS 0x8E84
+#define GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS 0x8E85
+#define GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS 0x8E86
+#define GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS 0x8E89
+#define GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS 0x8E8A
+#define GL_MAX_TESS_CONTROL_INPUT_COMPONENTS 0x886C
+#define GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS 0x886D
+#define GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS 0x8E1E
+#define GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS 0x8E1F
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER 0x84F0
+#define GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER 0x84F1
+#define GL_TESS_EVALUATION_SHADER 0x8E87
+#define GL_TESS_CONTROL_SHADER 0x8E88
+#endif
+
+#ifndef GL_ARB_texture_buffer_object_rgb32
+/* reuse GL_RGB32F */
+/* reuse GL_RGB32UI */
+/* reuse GL_RGB32I */
+#endif
+
+#ifndef GL_ARB_transform_feedback2
+#define GL_TRANSFORM_FEEDBACK 0x8E22
+#define GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED 0x8E23
+#define GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE 0x8E24
+#define GL_TRANSFORM_FEEDBACK_BINDING 0x8E25
+#endif
+
+#ifndef GL_ARB_transform_feedback3
+#define GL_MAX_TRANSFORM_FEEDBACK_BUFFERS 0x8E70
+#define GL_MAX_VERTEX_STREAMS 0x8E71
+#endif
+
+#ifndef GL_ARB_ES2_compatibility
+#define GL_FIXED 0x140C
+#define GL_IMPLEMENTATION_COLOR_READ_TYPE 0x8B9A
+#define GL_IMPLEMENTATION_COLOR_READ_FORMAT 0x8B9B
+#define GL_LOW_FLOAT 0x8DF0
+#define GL_MEDIUM_FLOAT 0x8DF1
+#define GL_HIGH_FLOAT 0x8DF2
+#define GL_LOW_INT 0x8DF3
+#define GL_MEDIUM_INT 0x8DF4
+#define GL_HIGH_INT 0x8DF5
+#define GL_SHADER_COMPILER 0x8DFA
+#define GL_NUM_SHADER_BINARY_FORMATS 0x8DF9
+#define GL_MAX_VERTEX_UNIFORM_VECTORS 0x8DFB
+#define GL_MAX_VARYING_VECTORS 0x8DFC
+#define GL_MAX_FRAGMENT_UNIFORM_VECTORS 0x8DFD
+#endif
+
+#ifndef GL_ARB_get_program_binary
+#define GL_PROGRAM_BINARY_RETRIEVABLE_HINT 0x8257
+#define GL_PROGRAM_BINARY_LENGTH 0x8741
+#define GL_NUM_PROGRAM_BINARY_FORMATS 0x87FE
+#define GL_PROGRAM_BINARY_FORMATS 0x87FF
+#endif
+
+#ifndef GL_ARB_separate_shader_objects
+#define GL_VERTEX_SHADER_BIT 0x00000001
+#define GL_FRAGMENT_SHADER_BIT 0x00000002
+#define GL_GEOMETRY_SHADER_BIT 0x00000004
+#define GL_TESS_CONTROL_SHADER_BIT 0x00000008
+#define GL_TESS_EVALUATION_SHADER_BIT 0x00000010
+#define GL_ALL_SHADER_BITS 0xFFFFFFFF
+#define GL_PROGRAM_SEPARABLE 0x8258
+#define GL_ACTIVE_PROGRAM 0x8259
+#define GL_PROGRAM_PIPELINE_BINDING 0x825A
+#endif
+
+#ifndef GL_ARB_shader_precision
+#endif
+
+#ifndef GL_ARB_vertex_attrib_64bit
+/* reuse GL_RGB32I */
+/* reuse GL_DOUBLE_VEC2 */
+/* reuse GL_DOUBLE_VEC3 */
+/* reuse GL_DOUBLE_VEC4 */
+/* reuse GL_DOUBLE_MAT2 */
+/* reuse GL_DOUBLE_MAT3 */
+/* reuse GL_DOUBLE_MAT4 */
+/* reuse GL_DOUBLE_MAT2x3 */
+/* reuse GL_DOUBLE_MAT2x4 */
+/* reuse GL_DOUBLE_MAT3x2 */
+/* reuse GL_DOUBLE_MAT3x4 */
+/* reuse GL_DOUBLE_MAT4x2 */
+/* reuse GL_DOUBLE_MAT4x3 */
+#endif
+
+#ifndef GL_ARB_viewport_array
+/* reuse GL_SCISSOR_BOX */
+/* reuse GL_VIEWPORT */
+/* reuse GL_DEPTH_RANGE */
+/* reuse GL_SCISSOR_TEST */
+#define GL_MAX_VIEWPORTS 0x825B
+#define GL_VIEWPORT_SUBPIXEL_BITS 0x825C
+#define GL_VIEWPORT_BOUNDS_RANGE 0x825D
+#define GL_LAYER_PROVOKING_VERTEX 0x825E
+#define GL_VIEWPORT_INDEX_PROVOKING_VERTEX 0x825F
+#define GL_UNDEFINED_VERTEX 0x8260
+/* reuse GL_FIRST_VERTEX_CONVENTION */
+/* reuse GL_LAST_VERTEX_CONVENTION */
+/* reuse GL_PROVOKING_VERTEX */
+#endif
+
+#ifndef GL_ARB_cl_event
+#define GL_SYNC_CL_EVENT_ARB 0x8240
+#define GL_SYNC_CL_EVENT_COMPLETE_ARB 0x8241
+#endif
+
+#ifndef GL_ARB_debug_output
+#define GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB 0x8242
+#define GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH_ARB 0x8243
+#define GL_DEBUG_CALLBACK_FUNCTION_ARB 0x8244
+#define GL_DEBUG_CALLBACK_USER_PARAM_ARB 0x8245
+#define GL_DEBUG_SOURCE_API_ARB 0x8246
+#define GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB 0x8247
+#define GL_DEBUG_SOURCE_SHADER_COMPILER_ARB 0x8248
+#define GL_DEBUG_SOURCE_THIRD_PARTY_ARB 0x8249
+#define GL_DEBUG_SOURCE_APPLICATION_ARB 0x824A
+#define GL_DEBUG_SOURCE_OTHER_ARB 0x824B
+#define GL_DEBUG_TYPE_ERROR_ARB 0x824C
+#define GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB 0x824D
+#define GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB 0x824E
+#define GL_DEBUG_TYPE_PORTABILITY_ARB 0x824F
+#define GL_DEBUG_TYPE_PERFORMANCE_ARB 0x8250
+#define GL_DEBUG_TYPE_OTHER_ARB 0x8251
+#define GL_MAX_DEBUG_MESSAGE_LENGTH_ARB 0x9143
+#define GL_MAX_DEBUG_LOGGED_MESSAGES_ARB 0x9144
+#define GL_DEBUG_LOGGED_MESSAGES_ARB 0x9145
+#define GL_DEBUG_SEVERITY_HIGH_ARB 0x9146
+#define GL_DEBUG_SEVERITY_MEDIUM_ARB 0x9147
+#define GL_DEBUG_SEVERITY_LOW_ARB 0x9148
+#endif
+
+#ifndef GL_ARB_robustness
+/* reuse GL_NO_ERROR */
+#define GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB 0x00000004
+#define GL_LOSE_CONTEXT_ON_RESET_ARB 0x8252
+#define GL_GUILTY_CONTEXT_RESET_ARB 0x8253
+#define GL_INNOCENT_CONTEXT_RESET_ARB 0x8254
+#define GL_UNKNOWN_CONTEXT_RESET_ARB 0x8255
+#define GL_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
+#define GL_NO_RESET_NOTIFICATION_ARB 0x8261
+#endif
+
+#ifndef GL_ARB_shader_stencil_export
+#endif
+
+#ifndef GL_EXT_abgr
+#define GL_ABGR_EXT 0x8000
+#endif
+
+#ifndef GL_EXT_blend_color
+#define GL_CONSTANT_COLOR_EXT 0x8001
+#define GL_ONE_MINUS_CONSTANT_COLOR_EXT 0x8002
+#define GL_CONSTANT_ALPHA_EXT 0x8003
+#define GL_ONE_MINUS_CONSTANT_ALPHA_EXT 0x8004
+#define GL_BLEND_COLOR_EXT 0x8005
+#endif
+
+#ifndef GL_EXT_polygon_offset
+#define GL_POLYGON_OFFSET_EXT 0x8037
+#define GL_POLYGON_OFFSET_FACTOR_EXT 0x8038
+#define GL_POLYGON_OFFSET_BIAS_EXT 0x8039
+#endif
+
+#ifndef GL_EXT_texture
+#define GL_ALPHA4_EXT 0x803B
+#define GL_ALPHA8_EXT 0x803C
+#define GL_ALPHA12_EXT 0x803D
+#define GL_ALPHA16_EXT 0x803E
+#define GL_LUMINANCE4_EXT 0x803F
+#define GL_LUMINANCE8_EXT 0x8040
+#define GL_LUMINANCE12_EXT 0x8041
+#define GL_LUMINANCE16_EXT 0x8042
+#define GL_LUMINANCE4_ALPHA4_EXT 0x8043
+#define GL_LUMINANCE6_ALPHA2_EXT 0x8044
+#define GL_LUMINANCE8_ALPHA8_EXT 0x8045
+#define GL_LUMINANCE12_ALPHA4_EXT 0x8046
+#define GL_LUMINANCE12_ALPHA12_EXT 0x8047
+#define GL_LUMINANCE16_ALPHA16_EXT 0x8048
+#define GL_INTENSITY_EXT 0x8049
+#define GL_INTENSITY4_EXT 0x804A
+#define GL_INTENSITY8_EXT 0x804B
+#define GL_INTENSITY12_EXT 0x804C
+#define GL_INTENSITY16_EXT 0x804D
+#define GL_RGB2_EXT 0x804E
+#define GL_RGB4_EXT 0x804F
+#define GL_RGB5_EXT 0x8050
+#define GL_RGB8_EXT 0x8051
+#define GL_RGB10_EXT 0x8052
+#define GL_RGB12_EXT 0x8053
+#define GL_RGB16_EXT 0x8054
+#define GL_RGBA2_EXT 0x8055
+#define GL_RGBA4_EXT 0x8056
+#define GL_RGB5_A1_EXT 0x8057
+#define GL_RGBA8_EXT 0x8058
+#define GL_RGB10_A2_EXT 0x8059
+#define GL_RGBA12_EXT 0x805A
+#define GL_RGBA16_EXT 0x805B
+#define GL_TEXTURE_RED_SIZE_EXT 0x805C
+#define GL_TEXTURE_GREEN_SIZE_EXT 0x805D
+#define GL_TEXTURE_BLUE_SIZE_EXT 0x805E
+#define GL_TEXTURE_ALPHA_SIZE_EXT 0x805F
+#define GL_TEXTURE_LUMINANCE_SIZE_EXT 0x8060
+#define GL_TEXTURE_INTENSITY_SIZE_EXT 0x8061
+#define GL_REPLACE_EXT 0x8062
+#define GL_PROXY_TEXTURE_1D_EXT 0x8063
+#define GL_PROXY_TEXTURE_2D_EXT 0x8064
+#define GL_TEXTURE_TOO_LARGE_EXT 0x8065
+#endif
+
+#ifndef GL_EXT_texture3D
+#define GL_PACK_SKIP_IMAGES_EXT 0x806B
+#define GL_PACK_IMAGE_HEIGHT_EXT 0x806C
+#define GL_UNPACK_SKIP_IMAGES_EXT 0x806D
+#define GL_UNPACK_IMAGE_HEIGHT_EXT 0x806E
+#define GL_TEXTURE_3D_EXT 0x806F
+#define GL_PROXY_TEXTURE_3D_EXT 0x8070
+#define GL_TEXTURE_DEPTH_EXT 0x8071
+#define GL_TEXTURE_WRAP_R_EXT 0x8072
+#define GL_MAX_3D_TEXTURE_SIZE_EXT 0x8073
+#endif
+
+#ifndef GL_SGIS_texture_filter4
+#define GL_FILTER4_SGIS 0x8146
+#define GL_TEXTURE_FILTER4_SIZE_SGIS 0x8147
+#endif
+
+#ifndef GL_EXT_subtexture
+#endif
+
+#ifndef GL_EXT_copy_texture
+#endif
+
+#ifndef GL_EXT_histogram
+#define GL_HISTOGRAM_EXT 0x8024
+#define GL_PROXY_HISTOGRAM_EXT 0x8025
+#define GL_HISTOGRAM_WIDTH_EXT 0x8026
+#define GL_HISTOGRAM_FORMAT_EXT 0x8027
+#define GL_HISTOGRAM_RED_SIZE_EXT 0x8028
+#define GL_HISTOGRAM_GREEN_SIZE_EXT 0x8029
+#define GL_HISTOGRAM_BLUE_SIZE_EXT 0x802A
+#define GL_HISTOGRAM_ALPHA_SIZE_EXT 0x802B
+#define GL_HISTOGRAM_LUMINANCE_SIZE_EXT 0x802C
+#define GL_HISTOGRAM_SINK_EXT 0x802D
+#define GL_MINMAX_EXT 0x802E
+#define GL_MINMAX_FORMAT_EXT 0x802F
+#define GL_MINMAX_SINK_EXT 0x8030
+#define GL_TABLE_TOO_LARGE_EXT 0x8031
+#endif
+
+#ifndef GL_EXT_convolution
+#define GL_CONVOLUTION_1D_EXT 0x8010
+#define GL_CONVOLUTION_2D_EXT 0x8011
+#define GL_SEPARABLE_2D_EXT 0x8012
+#define GL_CONVOLUTION_BORDER_MODE_EXT 0x8013
+#define GL_CONVOLUTION_FILTER_SCALE_EXT 0x8014
+#define GL_CONVOLUTION_FILTER_BIAS_EXT 0x8015
+#define GL_REDUCE_EXT 0x8016
+#define GL_CONVOLUTION_FORMAT_EXT 0x8017
+#define GL_CONVOLUTION_WIDTH_EXT 0x8018
+#define GL_CONVOLUTION_HEIGHT_EXT 0x8019
+#define GL_MAX_CONVOLUTION_WIDTH_EXT 0x801A
+#define GL_MAX_CONVOLUTION_HEIGHT_EXT 0x801B
+#define GL_POST_CONVOLUTION_RED_SCALE_EXT 0x801C
+#define GL_POST_CONVOLUTION_GREEN_SCALE_EXT 0x801D
+#define GL_POST_CONVOLUTION_BLUE_SCALE_EXT 0x801E
+#define GL_POST_CONVOLUTION_ALPHA_SCALE_EXT 0x801F
+#define GL_POST_CONVOLUTION_RED_BIAS_EXT 0x8020
+#define GL_POST_CONVOLUTION_GREEN_BIAS_EXT 0x8021
+#define GL_POST_CONVOLUTION_BLUE_BIAS_EXT 0x8022
+#define GL_POST_CONVOLUTION_ALPHA_BIAS_EXT 0x8023
+#endif
+
+#ifndef GL_SGI_color_matrix
+#define GL_COLOR_MATRIX_SGI 0x80B1
+#define GL_COLOR_MATRIX_STACK_DEPTH_SGI 0x80B2
+#define GL_MAX_COLOR_MATRIX_STACK_DEPTH_SGI 0x80B3
+#define GL_POST_COLOR_MATRIX_RED_SCALE_SGI 0x80B4
+#define GL_POST_COLOR_MATRIX_GREEN_SCALE_SGI 0x80B5
+#define GL_POST_COLOR_MATRIX_BLUE_SCALE_SGI 0x80B6
+#define GL_POST_COLOR_MATRIX_ALPHA_SCALE_SGI 0x80B7
+#define GL_POST_COLOR_MATRIX_RED_BIAS_SGI 0x80B8
+#define GL_POST_COLOR_MATRIX_GREEN_BIAS_SGI 0x80B9
+#define GL_POST_COLOR_MATRIX_BLUE_BIAS_SGI 0x80BA
+#define GL_POST_COLOR_MATRIX_ALPHA_BIAS_SGI 0x80BB
+#endif
+
+#ifndef GL_SGI_color_table
+#define GL_COLOR_TABLE_SGI 0x80D0
+#define GL_POST_CONVOLUTION_COLOR_TABLE_SGI 0x80D1
+#define GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI 0x80D2
+#define GL_PROXY_COLOR_TABLE_SGI 0x80D3
+#define GL_PROXY_POST_CONVOLUTION_COLOR_TABLE_SGI 0x80D4
+#define GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE_SGI 0x80D5
+#define GL_COLOR_TABLE_SCALE_SGI 0x80D6
+#define GL_COLOR_TABLE_BIAS_SGI 0x80D7
+#define GL_COLOR_TABLE_FORMAT_SGI 0x80D8
+#define GL_COLOR_TABLE_WIDTH_SGI 0x80D9
+#define GL_COLOR_TABLE_RED_SIZE_SGI 0x80DA
+#define GL_COLOR_TABLE_GREEN_SIZE_SGI 0x80DB
+#define GL_COLOR_TABLE_BLUE_SIZE_SGI 0x80DC
+#define GL_COLOR_TABLE_ALPHA_SIZE_SGI 0x80DD
+#define GL_COLOR_TABLE_LUMINANCE_SIZE_SGI 0x80DE
+#define GL_COLOR_TABLE_INTENSITY_SIZE_SGI 0x80DF
+#endif
+
+#ifndef GL_SGIS_pixel_texture
+#define GL_PIXEL_TEXTURE_SGIS 0x8353
+#define GL_PIXEL_FRAGMENT_RGB_SOURCE_SGIS 0x8354
+#define GL_PIXEL_FRAGMENT_ALPHA_SOURCE_SGIS 0x8355
+#define GL_PIXEL_GROUP_COLOR_SGIS 0x8356
+#endif
+
+#ifndef GL_SGIX_pixel_texture
+#define GL_PIXEL_TEX_GEN_SGIX 0x8139
+#define GL_PIXEL_TEX_GEN_MODE_SGIX 0x832B
+#endif
+
+#ifndef GL_SGIS_texture4D
+#define GL_PACK_SKIP_VOLUMES_SGIS 0x8130
+#define GL_PACK_IMAGE_DEPTH_SGIS 0x8131
+#define GL_UNPACK_SKIP_VOLUMES_SGIS 0x8132
+#define GL_UNPACK_IMAGE_DEPTH_SGIS 0x8133
+#define GL_TEXTURE_4D_SGIS 0x8134
+#define GL_PROXY_TEXTURE_4D_SGIS 0x8135
+#define GL_TEXTURE_4DSIZE_SGIS 0x8136
+#define GL_TEXTURE_WRAP_Q_SGIS 0x8137
+#define GL_MAX_4D_TEXTURE_SIZE_SGIS 0x8138
+#define GL_TEXTURE_4D_BINDING_SGIS 0x814F
+#endif
+
+#ifndef GL_SGI_texture_color_table
+#define GL_TEXTURE_COLOR_TABLE_SGI 0x80BC
+#define GL_PROXY_TEXTURE_COLOR_TABLE_SGI 0x80BD
+#endif
+
+#ifndef GL_EXT_cmyka
+#define GL_CMYK_EXT 0x800C
+#define GL_CMYKA_EXT 0x800D
+#define GL_PACK_CMYK_HINT_EXT 0x800E
+#define GL_UNPACK_CMYK_HINT_EXT 0x800F
+#endif
+
+#ifndef GL_EXT_texture_object
+#define GL_TEXTURE_PRIORITY_EXT 0x8066
+#define GL_TEXTURE_RESIDENT_EXT 0x8067
+#define GL_TEXTURE_1D_BINDING_EXT 0x8068
+#define GL_TEXTURE_2D_BINDING_EXT 0x8069
+#define GL_TEXTURE_3D_BINDING_EXT 0x806A
+#endif
+
+#ifndef GL_SGIS_detail_texture
+#define GL_DETAIL_TEXTURE_2D_SGIS 0x8095
+#define GL_DETAIL_TEXTURE_2D_BINDING_SGIS 0x8096
+#define GL_LINEAR_DETAIL_SGIS 0x8097
+#define GL_LINEAR_DETAIL_ALPHA_SGIS 0x8098
+#define GL_LINEAR_DETAIL_COLOR_SGIS 0x8099
+#define GL_DETAIL_TEXTURE_LEVEL_SGIS 0x809A
+#define GL_DETAIL_TEXTURE_MODE_SGIS 0x809B
+#define GL_DETAIL_TEXTURE_FUNC_POINTS_SGIS 0x809C
+#endif
+
+#ifndef GL_SGIS_sharpen_texture
+#define GL_LINEAR_SHARPEN_SGIS 0x80AD
+#define GL_LINEAR_SHARPEN_ALPHA_SGIS 0x80AE
+#define GL_LINEAR_SHARPEN_COLOR_SGIS 0x80AF
+#define GL_SHARPEN_TEXTURE_FUNC_POINTS_SGIS 0x80B0
+#endif
+
+#ifndef GL_EXT_packed_pixels
+#define GL_UNSIGNED_BYTE_3_3_2_EXT 0x8032
+#define GL_UNSIGNED_SHORT_4_4_4_4_EXT 0x8033
+#define GL_UNSIGNED_SHORT_5_5_5_1_EXT 0x8034
+#define GL_UNSIGNED_INT_8_8_8_8_EXT 0x8035
+#define GL_UNSIGNED_INT_10_10_10_2_EXT 0x8036
+#endif
+
+#ifndef GL_SGIS_texture_lod
+#define GL_TEXTURE_MIN_LOD_SGIS 0x813A
+#define GL_TEXTURE_MAX_LOD_SGIS 0x813B
+#define GL_TEXTURE_BASE_LEVEL_SGIS 0x813C
+#define GL_TEXTURE_MAX_LEVEL_SGIS 0x813D
+#endif
+
+#ifndef GL_SGIS_multisample
+#define GL_MULTISAMPLE_SGIS 0x809D
+#define GL_SAMPLE_ALPHA_TO_MASK_SGIS 0x809E
+#define GL_SAMPLE_ALPHA_TO_ONE_SGIS 0x809F
+#define GL_SAMPLE_MASK_SGIS 0x80A0
+#define GL_1PASS_SGIS 0x80A1
+#define GL_2PASS_0_SGIS 0x80A2
+#define GL_2PASS_1_SGIS 0x80A3
+#define GL_4PASS_0_SGIS 0x80A4
+#define GL_4PASS_1_SGIS 0x80A5
+#define GL_4PASS_2_SGIS 0x80A6
+#define GL_4PASS_3_SGIS 0x80A7
+#define GL_SAMPLE_BUFFERS_SGIS 0x80A8
+#define GL_SAMPLES_SGIS 0x80A9
+#define GL_SAMPLE_MASK_VALUE_SGIS 0x80AA
+#define GL_SAMPLE_MASK_INVERT_SGIS 0x80AB
+#define GL_SAMPLE_PATTERN_SGIS 0x80AC
+#endif
+
+#ifndef GL_EXT_rescale_normal
+#define GL_RESCALE_NORMAL_EXT 0x803A
+#endif
+
+#ifndef GL_EXT_vertex_array
+#define GL_VERTEX_ARRAY_EXT 0x8074
+#define GL_NORMAL_ARRAY_EXT 0x8075
+#define GL_COLOR_ARRAY_EXT 0x8076
+#define GL_INDEX_ARRAY_EXT 0x8077
+#define GL_TEXTURE_COORD_ARRAY_EXT 0x8078
+#define GL_EDGE_FLAG_ARRAY_EXT 0x8079
+#define GL_VERTEX_ARRAY_SIZE_EXT 0x807A
+#define GL_VERTEX_ARRAY_TYPE_EXT 0x807B
+#define GL_VERTEX_ARRAY_STRIDE_EXT 0x807C
+#define GL_VERTEX_ARRAY_COUNT_EXT 0x807D
+#define GL_NORMAL_ARRAY_TYPE_EXT 0x807E
+#define GL_NORMAL_ARRAY_STRIDE_EXT 0x807F
+#define GL_NORMAL_ARRAY_COUNT_EXT 0x8080
+#define GL_COLOR_ARRAY_SIZE_EXT 0x8081
+#define GL_COLOR_ARRAY_TYPE_EXT 0x8082
+#define GL_COLOR_ARRAY_STRIDE_EXT 0x8083
+#define GL_COLOR_ARRAY_COUNT_EXT 0x8084
+#define GL_INDEX_ARRAY_TYPE_EXT 0x8085
+#define GL_INDEX_ARRAY_STRIDE_EXT 0x8086
+#define GL_INDEX_ARRAY_COUNT_EXT 0x8087
+#define GL_TEXTURE_COORD_ARRAY_SIZE_EXT 0x8088
+#define GL_TEXTURE_COORD_ARRAY_TYPE_EXT 0x8089
+#define GL_TEXTURE_COORD_ARRAY_STRIDE_EXT 0x808A
+#define GL_TEXTURE_COORD_ARRAY_COUNT_EXT 0x808B
+#define GL_EDGE_FLAG_ARRAY_STRIDE_EXT 0x808C
+#define GL_EDGE_FLAG_ARRAY_COUNT_EXT 0x808D
+#define GL_VERTEX_ARRAY_POINTER_EXT 0x808E
+#define GL_NORMAL_ARRAY_POINTER_EXT 0x808F
+#define GL_COLOR_ARRAY_POINTER_EXT 0x8090
+#define GL_INDEX_ARRAY_POINTER_EXT 0x8091
+#define GL_TEXTURE_COORD_ARRAY_POINTER_EXT 0x8092
+#define GL_EDGE_FLAG_ARRAY_POINTER_EXT 0x8093
+#endif
+
+#ifndef GL_EXT_misc_attribute
+#endif
+
+#ifndef GL_SGIS_generate_mipmap
+#define GL_GENERATE_MIPMAP_SGIS 0x8191
+#define GL_GENERATE_MIPMAP_HINT_SGIS 0x8192
+#endif
+
+#ifndef GL_SGIX_clipmap
+#define GL_LINEAR_CLIPMAP_LINEAR_SGIX 0x8170
+#define GL_TEXTURE_CLIPMAP_CENTER_SGIX 0x8171
+#define GL_TEXTURE_CLIPMAP_FRAME_SGIX 0x8172
+#define GL_TEXTURE_CLIPMAP_OFFSET_SGIX 0x8173
+#define GL_TEXTURE_CLIPMAP_VIRTUAL_DEPTH_SGIX 0x8174
+#define GL_TEXTURE_CLIPMAP_LOD_OFFSET_SGIX 0x8175
+#define GL_TEXTURE_CLIPMAP_DEPTH_SGIX 0x8176
+#define GL_MAX_CLIPMAP_DEPTH_SGIX 0x8177
+#define GL_MAX_CLIPMAP_VIRTUAL_DEPTH_SGIX 0x8178
+#define GL_NEAREST_CLIPMAP_NEAREST_SGIX 0x844D
+#define GL_NEAREST_CLIPMAP_LINEAR_SGIX 0x844E
+#define GL_LINEAR_CLIPMAP_NEAREST_SGIX 0x844F
+#endif
+
+#ifndef GL_SGIX_shadow
+#define GL_TEXTURE_COMPARE_SGIX 0x819A
+#define GL_TEXTURE_COMPARE_OPERATOR_SGIX 0x819B
+#define GL_TEXTURE_LEQUAL_R_SGIX 0x819C
+#define GL_TEXTURE_GEQUAL_R_SGIX 0x819D
+#endif
+
+#ifndef GL_SGIS_texture_edge_clamp
+#define GL_CLAMP_TO_EDGE_SGIS 0x812F
+#endif
+
+#ifndef GL_SGIS_texture_border_clamp
+#define GL_CLAMP_TO_BORDER_SGIS 0x812D
+#endif
+
+#ifndef GL_EXT_blend_minmax
+#define GL_FUNC_ADD_EXT 0x8006
+#define GL_MIN_EXT 0x8007
+#define GL_MAX_EXT 0x8008
+#define GL_BLEND_EQUATION_EXT 0x8009
+#endif
+
+#ifndef GL_EXT_blend_subtract
+#define GL_FUNC_SUBTRACT_EXT 0x800A
+#define GL_FUNC_REVERSE_SUBTRACT_EXT 0x800B
+#endif
+
+#ifndef GL_EXT_blend_logic_op
+#endif
+
+#ifndef GL_SGIX_interlace
+#define GL_INTERLACE_SGIX 0x8094
+#endif
+
+#ifndef GL_SGIX_pixel_tiles
+#define GL_PIXEL_TILE_BEST_ALIGNMENT_SGIX 0x813E
+#define GL_PIXEL_TILE_CACHE_INCREMENT_SGIX 0x813F
+#define GL_PIXEL_TILE_WIDTH_SGIX 0x8140
+#define GL_PIXEL_TILE_HEIGHT_SGIX 0x8141
+#define GL_PIXEL_TILE_GRID_WIDTH_SGIX 0x8142
+#define GL_PIXEL_TILE_GRID_HEIGHT_SGIX 0x8143
+#define GL_PIXEL_TILE_GRID_DEPTH_SGIX 0x8144
+#define GL_PIXEL_TILE_CACHE_SIZE_SGIX 0x8145
+#endif
+
+#ifndef GL_SGIS_texture_select
+#define GL_DUAL_ALPHA4_SGIS 0x8110
+#define GL_DUAL_ALPHA8_SGIS 0x8111
+#define GL_DUAL_ALPHA12_SGIS 0x8112
+#define GL_DUAL_ALPHA16_SGIS 0x8113
+#define GL_DUAL_LUMINANCE4_SGIS 0x8114
+#define GL_DUAL_LUMINANCE8_SGIS 0x8115
+#define GL_DUAL_LUMINANCE12_SGIS 0x8116
+#define GL_DUAL_LUMINANCE16_SGIS 0x8117
+#define GL_DUAL_INTENSITY4_SGIS 0x8118
+#define GL_DUAL_INTENSITY8_SGIS 0x8119
+#define GL_DUAL_INTENSITY12_SGIS 0x811A
+#define GL_DUAL_INTENSITY16_SGIS 0x811B
+#define GL_DUAL_LUMINANCE_ALPHA4_SGIS 0x811C
+#define GL_DUAL_LUMINANCE_ALPHA8_SGIS 0x811D
+#define GL_QUAD_ALPHA4_SGIS 0x811E
+#define GL_QUAD_ALPHA8_SGIS 0x811F
+#define GL_QUAD_LUMINANCE4_SGIS 0x8120
+#define GL_QUAD_LUMINANCE8_SGIS 0x8121
+#define GL_QUAD_INTENSITY4_SGIS 0x8122
+#define GL_QUAD_INTENSITY8_SGIS 0x8123
+#define GL_DUAL_TEXTURE_SELECT_SGIS 0x8124
+#define GL_QUAD_TEXTURE_SELECT_SGIS 0x8125
+#endif
+
+#ifndef GL_SGIX_sprite
+#define GL_SPRITE_SGIX 0x8148
+#define GL_SPRITE_MODE_SGIX 0x8149
+#define GL_SPRITE_AXIS_SGIX 0x814A
+#define GL_SPRITE_TRANSLATION_SGIX 0x814B
+#define GL_SPRITE_AXIAL_SGIX 0x814C
+#define GL_SPRITE_OBJECT_ALIGNED_SGIX 0x814D
+#define GL_SPRITE_EYE_ALIGNED_SGIX 0x814E
+#endif
+
+#ifndef GL_SGIX_texture_multi_buffer
+#define GL_TEXTURE_MULTI_BUFFER_HINT_SGIX 0x812E
+#endif
+
+#ifndef GL_EXT_point_parameters
+#define GL_POINT_SIZE_MIN_EXT 0x8126
+#define GL_POINT_SIZE_MAX_EXT 0x8127
+#define GL_POINT_FADE_THRESHOLD_SIZE_EXT 0x8128
+#define GL_DISTANCE_ATTENUATION_EXT 0x8129
+#endif
+
+#ifndef GL_SGIS_point_parameters
+#define GL_POINT_SIZE_MIN_SGIS 0x8126
+#define GL_POINT_SIZE_MAX_SGIS 0x8127
+#define GL_POINT_FADE_THRESHOLD_SIZE_SGIS 0x8128
+#define GL_DISTANCE_ATTENUATION_SGIS 0x8129
+#endif
+
+#ifndef GL_SGIX_instruments
+#define GL_INSTRUMENT_BUFFER_POINTER_SGIX 0x8180
+#define GL_INSTRUMENT_MEASUREMENTS_SGIX 0x8181
+#endif
+
+#ifndef GL_SGIX_texture_scale_bias
+#define GL_POST_TEXTURE_FILTER_BIAS_SGIX 0x8179
+#define GL_POST_TEXTURE_FILTER_SCALE_SGIX 0x817A
+#define GL_POST_TEXTURE_FILTER_BIAS_RANGE_SGIX 0x817B
+#define GL_POST_TEXTURE_FILTER_SCALE_RANGE_SGIX 0x817C
+#endif
+
+#ifndef GL_SGIX_framezoom
+#define GL_FRAMEZOOM_SGIX 0x818B
+#define GL_FRAMEZOOM_FACTOR_SGIX 0x818C
+#define GL_MAX_FRAMEZOOM_FACTOR_SGIX 0x818D
+#endif
+
+#ifndef GL_SGIX_tag_sample_buffer
+#endif
+
+#ifndef GL_FfdMaskSGIX
+#define GL_TEXTURE_DEFORMATION_BIT_SGIX 0x00000001
+#define GL_GEOMETRY_DEFORMATION_BIT_SGIX 0x00000002
+#endif
+
+#ifndef GL_SGIX_polynomial_ffd
+#define GL_GEOMETRY_DEFORMATION_SGIX 0x8194
+#define GL_TEXTURE_DEFORMATION_SGIX 0x8195
+#define GL_DEFORMATIONS_MASK_SGIX 0x8196
+#define GL_MAX_DEFORMATION_ORDER_SGIX 0x8197
+#endif
+
+#ifndef GL_SGIX_reference_plane
+#define GL_REFERENCE_PLANE_SGIX 0x817D
+#define GL_REFERENCE_PLANE_EQUATION_SGIX 0x817E
+#endif
+
+#ifndef GL_SGIX_flush_raster
+#endif
+
+#ifndef GL_SGIX_depth_texture
+#define GL_DEPTH_COMPONENT16_SGIX 0x81A5
+#define GL_DEPTH_COMPONENT24_SGIX 0x81A6
+#define GL_DEPTH_COMPONENT32_SGIX 0x81A7
+#endif
+
+#ifndef GL_SGIS_fog_function
+#define GL_FOG_FUNC_SGIS 0x812A
+#define GL_FOG_FUNC_POINTS_SGIS 0x812B
+#define GL_MAX_FOG_FUNC_POINTS_SGIS 0x812C
+#endif
+
+#ifndef GL_SGIX_fog_offset
+#define GL_FOG_OFFSET_SGIX 0x8198
+#define GL_FOG_OFFSET_VALUE_SGIX 0x8199
+#endif
+
+#ifndef GL_HP_image_transform
+#define GL_IMAGE_SCALE_X_HP 0x8155
+#define GL_IMAGE_SCALE_Y_HP 0x8156
+#define GL_IMAGE_TRANSLATE_X_HP 0x8157
+#define GL_IMAGE_TRANSLATE_Y_HP 0x8158
+#define GL_IMAGE_ROTATE_ANGLE_HP 0x8159
+#define GL_IMAGE_ROTATE_ORIGIN_X_HP 0x815A
+#define GL_IMAGE_ROTATE_ORIGIN_Y_HP 0x815B
+#define GL_IMAGE_MAG_FILTER_HP 0x815C
+#define GL_IMAGE_MIN_FILTER_HP 0x815D
+#define GL_IMAGE_CUBIC_WEIGHT_HP 0x815E
+#define GL_CUBIC_HP 0x815F
+#define GL_AVERAGE_HP 0x8160
+#define GL_IMAGE_TRANSFORM_2D_HP 0x8161
+#define GL_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP 0x8162
+#define GL_PROXY_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP 0x8163
+#endif
+
+#ifndef GL_HP_convolution_border_modes
+#define GL_IGNORE_BORDER_HP 0x8150
+#define GL_CONSTANT_BORDER_HP 0x8151
+#define GL_REPLICATE_BORDER_HP 0x8153
+#define GL_CONVOLUTION_BORDER_COLOR_HP 0x8154
+#endif
+
+#ifndef GL_INGR_palette_buffer
+#endif
+
+#ifndef GL_SGIX_texture_add_env
+#define GL_TEXTURE_ENV_BIAS_SGIX 0x80BE
+#endif
+
+#ifndef GL_EXT_color_subtable
+#endif
+
+#ifndef GL_PGI_vertex_hints
+#define GL_VERTEX_DATA_HINT_PGI 0x1A22A
+#define GL_VERTEX_CONSISTENT_HINT_PGI 0x1A22B
+#define GL_MATERIAL_SIDE_HINT_PGI 0x1A22C
+#define GL_MAX_VERTEX_HINT_PGI 0x1A22D
+#define GL_COLOR3_BIT_PGI 0x00010000
+#define GL_COLOR4_BIT_PGI 0x00020000
+#define GL_EDGEFLAG_BIT_PGI 0x00040000
+#define GL_INDEX_BIT_PGI 0x00080000
+#define GL_MAT_AMBIENT_BIT_PGI 0x00100000
+#define GL_MAT_AMBIENT_AND_DIFFUSE_BIT_PGI 0x00200000
+#define GL_MAT_DIFFUSE_BIT_PGI 0x00400000
+#define GL_MAT_EMISSION_BIT_PGI 0x00800000
+#define GL_MAT_COLOR_INDEXES_BIT_PGI 0x01000000
+#define GL_MAT_SHININESS_BIT_PGI 0x02000000
+#define GL_MAT_SPECULAR_BIT_PGI 0x04000000
+#define GL_NORMAL_BIT_PGI 0x08000000
+#define GL_TEXCOORD1_BIT_PGI 0x10000000
+#define GL_TEXCOORD2_BIT_PGI 0x20000000
+#define GL_TEXCOORD3_BIT_PGI 0x40000000
+#define GL_TEXCOORD4_BIT_PGI 0x80000000
+#define GL_VERTEX23_BIT_PGI 0x00000004
+#define GL_VERTEX4_BIT_PGI 0x00000008
+#endif
+
+#ifndef GL_PGI_misc_hints
+#define GL_PREFER_DOUBLEBUFFER_HINT_PGI 0x1A1F8
+#define GL_CONSERVE_MEMORY_HINT_PGI 0x1A1FD
+#define GL_RECLAIM_MEMORY_HINT_PGI 0x1A1FE
+#define GL_NATIVE_GRAPHICS_HANDLE_PGI 0x1A202
+#define GL_NATIVE_GRAPHICS_BEGIN_HINT_PGI 0x1A203
+#define GL_NATIVE_GRAPHICS_END_HINT_PGI 0x1A204
+#define GL_ALWAYS_FAST_HINT_PGI 0x1A20C
+#define GL_ALWAYS_SOFT_HINT_PGI 0x1A20D
+#define GL_ALLOW_DRAW_OBJ_HINT_PGI 0x1A20E
+#define GL_ALLOW_DRAW_WIN_HINT_PGI 0x1A20F
+#define GL_ALLOW_DRAW_FRG_HINT_PGI 0x1A210
+#define GL_ALLOW_DRAW_MEM_HINT_PGI 0x1A211
+#define GL_STRICT_DEPTHFUNC_HINT_PGI 0x1A216
+#define GL_STRICT_LIGHTING_HINT_PGI 0x1A217
+#define GL_STRICT_SCISSOR_HINT_PGI 0x1A218
+#define GL_FULL_STIPPLE_HINT_PGI 0x1A219
+#define GL_CLIP_NEAR_HINT_PGI 0x1A220
+#define GL_CLIP_FAR_HINT_PGI 0x1A221
+#define GL_WIDE_LINE_HINT_PGI 0x1A222
+#define GL_BACK_NORMALS_HINT_PGI 0x1A223
+#endif
+
+#ifndef GL_EXT_paletted_texture
+#define GL_COLOR_INDEX1_EXT 0x80E2
+#define GL_COLOR_INDEX2_EXT 0x80E3
+#define GL_COLOR_INDEX4_EXT 0x80E4
+#define GL_COLOR_INDEX8_EXT 0x80E5
+#define GL_COLOR_INDEX12_EXT 0x80E6
+#define GL_COLOR_INDEX16_EXT 0x80E7
+#define GL_TEXTURE_INDEX_SIZE_EXT 0x80ED
+#endif
+
+#ifndef GL_EXT_clip_volume_hint
+#define GL_CLIP_VOLUME_CLIPPING_HINT_EXT 0x80F0
+#endif
+
+#ifndef GL_SGIX_list_priority
+#define GL_LIST_PRIORITY_SGIX 0x8182
+#endif
+
+#ifndef GL_SGIX_ir_instrument1
+#define GL_IR_INSTRUMENT1_SGIX 0x817F
+#endif
+
+#ifndef GL_SGIX_calligraphic_fragment
+#define GL_CALLIGRAPHIC_FRAGMENT_SGIX 0x8183
+#endif
+
+#ifndef GL_SGIX_texture_lod_bias
+#define GL_TEXTURE_LOD_BIAS_S_SGIX 0x818E
+#define GL_TEXTURE_LOD_BIAS_T_SGIX 0x818F
+#define GL_TEXTURE_LOD_BIAS_R_SGIX 0x8190
+#endif
+
+#ifndef GL_SGIX_shadow_ambient
+#define GL_SHADOW_AMBIENT_SGIX 0x80BF
+#endif
+
+#ifndef GL_EXT_index_texture
+#endif
+
+#ifndef GL_EXT_index_material
+#define GL_INDEX_MATERIAL_EXT 0x81B8
+#define GL_INDEX_MATERIAL_PARAMETER_EXT 0x81B9
+#define GL_INDEX_MATERIAL_FACE_EXT 0x81BA
+#endif
+
+#ifndef GL_EXT_index_func
+#define GL_INDEX_TEST_EXT 0x81B5
+#define GL_INDEX_TEST_FUNC_EXT 0x81B6
+#define GL_INDEX_TEST_REF_EXT 0x81B7
+#endif
+
+#ifndef GL_EXT_index_array_formats
+#define GL_IUI_V2F_EXT 0x81AD
+#define GL_IUI_V3F_EXT 0x81AE
+#define GL_IUI_N3F_V2F_EXT 0x81AF
+#define GL_IUI_N3F_V3F_EXT 0x81B0
+#define GL_T2F_IUI_V2F_EXT 0x81B1
+#define GL_T2F_IUI_V3F_EXT 0x81B2
+#define GL_T2F_IUI_N3F_V2F_EXT 0x81B3
+#define GL_T2F_IUI_N3F_V3F_EXT 0x81B4
+#endif
+
+#ifndef GL_EXT_compiled_vertex_array
+#define GL_ARRAY_ELEMENT_LOCK_FIRST_EXT 0x81A8
+#define GL_ARRAY_ELEMENT_LOCK_COUNT_EXT 0x81A9
+#endif
+
+#ifndef GL_EXT_cull_vertex
+#define GL_CULL_VERTEX_EXT 0x81AA
+#define GL_CULL_VERTEX_EYE_POSITION_EXT 0x81AB
+#define GL_CULL_VERTEX_OBJECT_POSITION_EXT 0x81AC
+#endif
+
+#ifndef GL_SGIX_ycrcb
+#define GL_YCRCB_422_SGIX 0x81BB
+#define GL_YCRCB_444_SGIX 0x81BC
+#endif
+
+#ifndef GL_SGIX_fragment_lighting
+#define GL_FRAGMENT_LIGHTING_SGIX 0x8400
+#define GL_FRAGMENT_COLOR_MATERIAL_SGIX 0x8401
+#define GL_FRAGMENT_COLOR_MATERIAL_FACE_SGIX 0x8402
+#define GL_FRAGMENT_COLOR_MATERIAL_PARAMETER_SGIX 0x8403
+#define GL_MAX_FRAGMENT_LIGHTS_SGIX 0x8404
+#define GL_MAX_ACTIVE_LIGHTS_SGIX 0x8405
+#define GL_CURRENT_RASTER_NORMAL_SGIX 0x8406
+#define GL_LIGHT_ENV_MODE_SGIX 0x8407
+#define GL_FRAGMENT_LIGHT_MODEL_LOCAL_VIEWER_SGIX 0x8408
+#define GL_FRAGMENT_LIGHT_MODEL_TWO_SIDE_SGIX 0x8409
+#define GL_FRAGMENT_LIGHT_MODEL_AMBIENT_SGIX 0x840A
+#define GL_FRAGMENT_LIGHT_MODEL_NORMAL_INTERPOLATION_SGIX 0x840B
+#define GL_FRAGMENT_LIGHT0_SGIX 0x840C
+#define GL_FRAGMENT_LIGHT1_SGIX 0x840D
+#define GL_FRAGMENT_LIGHT2_SGIX 0x840E
+#define GL_FRAGMENT_LIGHT3_SGIX 0x840F
+#define GL_FRAGMENT_LIGHT4_SGIX 0x8410
+#define GL_FRAGMENT_LIGHT5_SGIX 0x8411
+#define GL_FRAGMENT_LIGHT6_SGIX 0x8412
+#define GL_FRAGMENT_LIGHT7_SGIX 0x8413
+#endif
+
+#ifndef GL_IBM_rasterpos_clip
+#define GL_RASTER_POSITION_UNCLIPPED_IBM 0x19262
+#endif
+
+#ifndef GL_HP_texture_lighting
+#define GL_TEXTURE_LIGHTING_MODE_HP 0x8167
+#define GL_TEXTURE_POST_SPECULAR_HP 0x8168
+#define GL_TEXTURE_PRE_SPECULAR_HP 0x8169
+#endif
+
+#ifndef GL_EXT_draw_range_elements
+#define GL_MAX_ELEMENTS_VERTICES_EXT 0x80E8
+#define GL_MAX_ELEMENTS_INDICES_EXT 0x80E9
+#endif
+
+#ifndef GL_WIN_phong_shading
+#define GL_PHONG_WIN 0x80EA
+#define GL_PHONG_HINT_WIN 0x80EB
+#endif
+
+#ifndef GL_WIN_specular_fog
+#define GL_FOG_SPECULAR_TEXTURE_WIN 0x80EC
+#endif
+
+#ifndef GL_EXT_light_texture
+#define GL_FRAGMENT_MATERIAL_EXT 0x8349
+#define GL_FRAGMENT_NORMAL_EXT 0x834A
+#define GL_FRAGMENT_COLOR_EXT 0x834C
+#define GL_ATTENUATION_EXT 0x834D
+#define GL_SHADOW_ATTENUATION_EXT 0x834E
+#define GL_TEXTURE_APPLICATION_MODE_EXT 0x834F
+#define GL_TEXTURE_LIGHT_EXT 0x8350
+#define GL_TEXTURE_MATERIAL_FACE_EXT 0x8351
+#define GL_TEXTURE_MATERIAL_PARAMETER_EXT 0x8352
+/* reuse GL_FRAGMENT_DEPTH_EXT */
+#endif
+
+#ifndef GL_SGIX_blend_alpha_minmax
+#define GL_ALPHA_MIN_SGIX 0x8320
+#define GL_ALPHA_MAX_SGIX 0x8321
+#endif
+
+#ifndef GL_SGIX_impact_pixel_texture
+#define GL_PIXEL_TEX_GEN_Q_CEILING_SGIX 0x8184
+#define GL_PIXEL_TEX_GEN_Q_ROUND_SGIX 0x8185
+#define GL_PIXEL_TEX_GEN_Q_FLOOR_SGIX 0x8186
+#define GL_PIXEL_TEX_GEN_ALPHA_REPLACE_SGIX 0x8187
+#define GL_PIXEL_TEX_GEN_ALPHA_NO_REPLACE_SGIX 0x8188
+#define GL_PIXEL_TEX_GEN_ALPHA_LS_SGIX 0x8189
+#define GL_PIXEL_TEX_GEN_ALPHA_MS_SGIX 0x818A
+#endif
+
+#ifndef GL_EXT_bgra
+#define GL_BGR_EXT 0x80E0
+#define GL_BGRA_EXT 0x80E1
+#endif
+
+#ifndef GL_SGIX_async
+#define GL_ASYNC_MARKER_SGIX 0x8329
+#endif
+
+#ifndef GL_SGIX_async_pixel
+#define GL_ASYNC_TEX_IMAGE_SGIX 0x835C
+#define GL_ASYNC_DRAW_PIXELS_SGIX 0x835D
+#define GL_ASYNC_READ_PIXELS_SGIX 0x835E
+#define GL_MAX_ASYNC_TEX_IMAGE_SGIX 0x835F
+#define GL_MAX_ASYNC_DRAW_PIXELS_SGIX 0x8360
+#define GL_MAX_ASYNC_READ_PIXELS_SGIX 0x8361
+#endif
+
+#ifndef GL_SGIX_async_histogram
+#define GL_ASYNC_HISTOGRAM_SGIX 0x832C
+#define GL_MAX_ASYNC_HISTOGRAM_SGIX 0x832D
+#endif
+
+#ifndef GL_INTEL_texture_scissor
+#endif
+
+#ifndef GL_INTEL_parallel_arrays
+#define GL_PARALLEL_ARRAYS_INTEL 0x83F4
+#define GL_VERTEX_ARRAY_PARALLEL_POINTERS_INTEL 0x83F5
+#define GL_NORMAL_ARRAY_PARALLEL_POINTERS_INTEL 0x83F6
+#define GL_COLOR_ARRAY_PARALLEL_POINTERS_INTEL 0x83F7
+#define GL_TEXTURE_COORD_ARRAY_PARALLEL_POINTERS_INTEL 0x83F8
+#endif
+
+#ifndef GL_HP_occlusion_test
+#define GL_OCCLUSION_TEST_HP 0x8165
+#define GL_OCCLUSION_TEST_RESULT_HP 0x8166
+#endif
+
+#ifndef GL_EXT_pixel_transform
+#define GL_PIXEL_TRANSFORM_2D_EXT 0x8330
+#define GL_PIXEL_MAG_FILTER_EXT 0x8331
+#define GL_PIXEL_MIN_FILTER_EXT 0x8332
+#define GL_PIXEL_CUBIC_WEIGHT_EXT 0x8333
+#define GL_CUBIC_EXT 0x8334
+#define GL_AVERAGE_EXT 0x8335
+#define GL_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT 0x8336
+#define GL_MAX_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT 0x8337
+#define GL_PIXEL_TRANSFORM_2D_MATRIX_EXT 0x8338
+#endif
+
+#ifndef GL_EXT_pixel_transform_color_table
+#endif
+
+#ifndef GL_EXT_shared_texture_palette
+#define GL_SHARED_TEXTURE_PALETTE_EXT 0x81FB
+#endif
+
+#ifndef GL_EXT_separate_specular_color
+#define GL_LIGHT_MODEL_COLOR_CONTROL_EXT 0x81F8
+#define GL_SINGLE_COLOR_EXT 0x81F9
+#define GL_SEPARATE_SPECULAR_COLOR_EXT 0x81FA
+#endif
+
+#ifndef GL_EXT_secondary_color
+#define GL_COLOR_SUM_EXT 0x8458
+#define GL_CURRENT_SECONDARY_COLOR_EXT 0x8459
+#define GL_SECONDARY_COLOR_ARRAY_SIZE_EXT 0x845A
+#define GL_SECONDARY_COLOR_ARRAY_TYPE_EXT 0x845B
+#define GL_SECONDARY_COLOR_ARRAY_STRIDE_EXT 0x845C
+#define GL_SECONDARY_COLOR_ARRAY_POINTER_EXT 0x845D
+#define GL_SECONDARY_COLOR_ARRAY_EXT 0x845E
+#endif
+
+#ifndef GL_EXT_texture_perturb_normal
+#define GL_PERTURB_EXT 0x85AE
+#define GL_TEXTURE_NORMAL_EXT 0x85AF
+#endif
+
+#ifndef GL_EXT_multi_draw_arrays
+#endif
+
+#ifndef GL_EXT_fog_coord
+#define GL_FOG_COORDINATE_SOURCE_EXT 0x8450
+#define GL_FOG_COORDINATE_EXT 0x8451
+#define GL_FRAGMENT_DEPTH_EXT 0x8452
+#define GL_CURRENT_FOG_COORDINATE_EXT 0x8453
+#define GL_FOG_COORDINATE_ARRAY_TYPE_EXT 0x8454
+#define GL_FOG_COORDINATE_ARRAY_STRIDE_EXT 0x8455
+#define GL_FOG_COORDINATE_ARRAY_POINTER_EXT 0x8456
+#define GL_FOG_COORDINATE_ARRAY_EXT 0x8457
+#endif
+
+#ifndef GL_REND_screen_coordinates
+#define GL_SCREEN_COORDINATES_REND 0x8490
+#define GL_INVERTED_SCREEN_W_REND 0x8491
+#endif
+
+#ifndef GL_EXT_coordinate_frame
+#define GL_TANGENT_ARRAY_EXT 0x8439
+#define GL_BINORMAL_ARRAY_EXT 0x843A
+#define GL_CURRENT_TANGENT_EXT 0x843B
+#define GL_CURRENT_BINORMAL_EXT 0x843C
+#define GL_TANGENT_ARRAY_TYPE_EXT 0x843E
+#define GL_TANGENT_ARRAY_STRIDE_EXT 0x843F
+#define GL_BINORMAL_ARRAY_TYPE_EXT 0x8440
+#define GL_BINORMAL_ARRAY_STRIDE_EXT 0x8441
+#define GL_TANGENT_ARRAY_POINTER_EXT 0x8442
+#define GL_BINORMAL_ARRAY_POINTER_EXT 0x8443
+#define GL_MAP1_TANGENT_EXT 0x8444
+#define GL_MAP2_TANGENT_EXT 0x8445
+#define GL_MAP1_BINORMAL_EXT 0x8446
+#define GL_MAP2_BINORMAL_EXT 0x8447
+#endif
+
+#ifndef GL_EXT_texture_env_combine
+#define GL_COMBINE_EXT 0x8570
+#define GL_COMBINE_RGB_EXT 0x8571
+#define GL_COMBINE_ALPHA_EXT 0x8572
+#define GL_RGB_SCALE_EXT 0x8573
+#define GL_ADD_SIGNED_EXT 0x8574
+#define GL_INTERPOLATE_EXT 0x8575
+#define GL_CONSTANT_EXT 0x8576
+#define GL_PRIMARY_COLOR_EXT 0x8577
+#define GL_PREVIOUS_EXT 0x8578
+#define GL_SOURCE0_RGB_EXT 0x8580
+#define GL_SOURCE1_RGB_EXT 0x8581
+#define GL_SOURCE2_RGB_EXT 0x8582
+#define GL_SOURCE0_ALPHA_EXT 0x8588
+#define GL_SOURCE1_ALPHA_EXT 0x8589
+#define GL_SOURCE2_ALPHA_EXT 0x858A
+#define GL_OPERAND0_RGB_EXT 0x8590
+#define GL_OPERAND1_RGB_EXT 0x8591
+#define GL_OPERAND2_RGB_EXT 0x8592
+#define GL_OPERAND0_ALPHA_EXT 0x8598
+#define GL_OPERAND1_ALPHA_EXT 0x8599
+#define GL_OPERAND2_ALPHA_EXT 0x859A
+#endif
+
+#ifndef GL_APPLE_specular_vector
+#define GL_LIGHT_MODEL_SPECULAR_VECTOR_APPLE 0x85B0
+#endif
+
+#ifndef GL_APPLE_transform_hint
+#define GL_TRANSFORM_HINT_APPLE 0x85B1
+#endif
+
+#ifndef GL_SGIX_fog_scale
+#define GL_FOG_SCALE_SGIX 0x81FC
+#define GL_FOG_SCALE_VALUE_SGIX 0x81FD
+#endif
+
+#ifndef GL_SUNX_constant_data
+#define GL_UNPACK_CONSTANT_DATA_SUNX 0x81D5
+#define GL_TEXTURE_CONSTANT_DATA_SUNX 0x81D6
+#endif
+
+#ifndef GL_SUN_global_alpha
+#define GL_GLOBAL_ALPHA_SUN 0x81D9
+#define GL_GLOBAL_ALPHA_FACTOR_SUN 0x81DA
+#endif
+
+#ifndef GL_SUN_triangle_list
+#define GL_RESTART_SUN 0x0001
+#define GL_REPLACE_MIDDLE_SUN 0x0002
+#define GL_REPLACE_OLDEST_SUN 0x0003
+#define GL_TRIANGLE_LIST_SUN 0x81D7
+#define GL_REPLACEMENT_CODE_SUN 0x81D8
+#define GL_REPLACEMENT_CODE_ARRAY_SUN 0x85C0
+#define GL_REPLACEMENT_CODE_ARRAY_TYPE_SUN 0x85C1
+#define GL_REPLACEMENT_CODE_ARRAY_STRIDE_SUN 0x85C2
+#define GL_REPLACEMENT_CODE_ARRAY_POINTER_SUN 0x85C3
+#define GL_R1UI_V3F_SUN 0x85C4
+#define GL_R1UI_C4UB_V3F_SUN 0x85C5
+#define GL_R1UI_C3F_V3F_SUN 0x85C6
+#define GL_R1UI_N3F_V3F_SUN 0x85C7
+#define GL_R1UI_C4F_N3F_V3F_SUN 0x85C8
+#define GL_R1UI_T2F_V3F_SUN 0x85C9
+#define GL_R1UI_T2F_N3F_V3F_SUN 0x85CA
+#define GL_R1UI_T2F_C4F_N3F_V3F_SUN 0x85CB
+#endif
+
+#ifndef GL_SUN_vertex
+#endif
+
+#ifndef GL_EXT_blend_func_separate
+#define GL_BLEND_DST_RGB_EXT 0x80C8
+#define GL_BLEND_SRC_RGB_EXT 0x80C9
+#define GL_BLEND_DST_ALPHA_EXT 0x80CA
+#define GL_BLEND_SRC_ALPHA_EXT 0x80CB
+#endif
+
+#ifndef GL_INGR_color_clamp
+#define GL_RED_MIN_CLAMP_INGR 0x8560
+#define GL_GREEN_MIN_CLAMP_INGR 0x8561
+#define GL_BLUE_MIN_CLAMP_INGR 0x8562
+#define GL_ALPHA_MIN_CLAMP_INGR 0x8563
+#define GL_RED_MAX_CLAMP_INGR 0x8564
+#define GL_GREEN_MAX_CLAMP_INGR 0x8565
+#define GL_BLUE_MAX_CLAMP_INGR 0x8566
+#define GL_ALPHA_MAX_CLAMP_INGR 0x8567
+#endif
+
+#ifndef GL_INGR_interlace_read
+#define GL_INTERLACE_READ_INGR 0x8568
+#endif
+
+#ifndef GL_EXT_stencil_wrap
+#define GL_INCR_WRAP_EXT 0x8507
+#define GL_DECR_WRAP_EXT 0x8508
+#endif
+
+#ifndef GL_EXT_422_pixels
+#define GL_422_EXT 0x80CC
+#define GL_422_REV_EXT 0x80CD
+#define GL_422_AVERAGE_EXT 0x80CE
+#define GL_422_REV_AVERAGE_EXT 0x80CF
+#endif
+
+#ifndef GL_NV_texgen_reflection
+#define GL_NORMAL_MAP_NV 0x8511
+#define GL_REFLECTION_MAP_NV 0x8512
+#endif
+
+#ifndef GL_EXT_texture_cube_map
+#define GL_NORMAL_MAP_EXT 0x8511
+#define GL_REFLECTION_MAP_EXT 0x8512
+#define GL_TEXTURE_CUBE_MAP_EXT 0x8513
+#define GL_TEXTURE_BINDING_CUBE_MAP_EXT 0x8514
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_X_EXT 0x8515
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X_EXT 0x8516
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y_EXT 0x8517
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT 0x8518
+#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z_EXT 0x8519
+#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT 0x851A
+#define GL_PROXY_TEXTURE_CUBE_MAP_EXT 0x851B
+#define GL_MAX_CUBE_MAP_TEXTURE_SIZE_EXT 0x851C
+#endif
+
+#ifndef GL_SUN_convolution_border_modes
+#define GL_WRAP_BORDER_SUN 0x81D4
+#endif
+
+#ifndef GL_EXT_texture_env_add
+#endif
+
+#ifndef GL_EXT_texture_lod_bias
+#define GL_MAX_TEXTURE_LOD_BIAS_EXT 0x84FD
+#define GL_TEXTURE_FILTER_CONTROL_EXT 0x8500
+#define GL_TEXTURE_LOD_BIAS_EXT 0x8501
+#endif
+
+#ifndef GL_EXT_texture_filter_anisotropic
+#define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
+#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
+#endif
+
+#ifndef GL_EXT_vertex_weighting
+#define GL_MODELVIEW0_STACK_DEPTH_EXT GL_MODELVIEW_STACK_DEPTH
+#define GL_MODELVIEW1_STACK_DEPTH_EXT 0x8502
+#define GL_MODELVIEW0_MATRIX_EXT GL_MODELVIEW_MATRIX
+#define GL_MODELVIEW1_MATRIX_EXT 0x8506
+#define GL_VERTEX_WEIGHTING_EXT 0x8509
+#define GL_MODELVIEW0_EXT GL_MODELVIEW
+#define GL_MODELVIEW1_EXT 0x850A
+#define GL_CURRENT_VERTEX_WEIGHT_EXT 0x850B
+#define GL_VERTEX_WEIGHT_ARRAY_EXT 0x850C
+#define GL_VERTEX_WEIGHT_ARRAY_SIZE_EXT 0x850D
+#define GL_VERTEX_WEIGHT_ARRAY_TYPE_EXT 0x850E
+#define GL_VERTEX_WEIGHT_ARRAY_STRIDE_EXT 0x850F
+#define GL_VERTEX_WEIGHT_ARRAY_POINTER_EXT 0x8510
+#endif
+
+#ifndef GL_NV_light_max_exponent
+#define GL_MAX_SHININESS_NV 0x8504
+#define GL_MAX_SPOT_EXPONENT_NV 0x8505
+#endif
+
+#ifndef GL_NV_vertex_array_range
+#define GL_VERTEX_ARRAY_RANGE_NV 0x851D
+#define GL_VERTEX_ARRAY_RANGE_LENGTH_NV 0x851E
+#define GL_VERTEX_ARRAY_RANGE_VALID_NV 0x851F
+#define GL_MAX_VERTEX_ARRAY_RANGE_ELEMENT_NV 0x8520
+#define GL_VERTEX_ARRAY_RANGE_POINTER_NV 0x8521
+#endif
+
+#ifndef GL_NV_register_combiners
+#define GL_REGISTER_COMBINERS_NV 0x8522
+#define GL_VARIABLE_A_NV 0x8523
+#define GL_VARIABLE_B_NV 0x8524
+#define GL_VARIABLE_C_NV 0x8525
+#define GL_VARIABLE_D_NV 0x8526
+#define GL_VARIABLE_E_NV 0x8527
+#define GL_VARIABLE_F_NV 0x8528
+#define GL_VARIABLE_G_NV 0x8529
+#define GL_CONSTANT_COLOR0_NV 0x852A
+#define GL_CONSTANT_COLOR1_NV 0x852B
+#define GL_PRIMARY_COLOR_NV 0x852C
+#define GL_SECONDARY_COLOR_NV 0x852D
+#define GL_SPARE0_NV 0x852E
+#define GL_SPARE1_NV 0x852F
+#define GL_DISCARD_NV 0x8530
+#define GL_E_TIMES_F_NV 0x8531
+#define GL_SPARE0_PLUS_SECONDARY_COLOR_NV 0x8532
+#define GL_UNSIGNED_IDENTITY_NV 0x8536
+#define GL_UNSIGNED_INVERT_NV 0x8537
+#define GL_EXPAND_NORMAL_NV 0x8538
+#define GL_EXPAND_NEGATE_NV 0x8539
+#define GL_HALF_BIAS_NORMAL_NV 0x853A
+#define GL_HALF_BIAS_NEGATE_NV 0x853B
+#define GL_SIGNED_IDENTITY_NV 0x853C
+#define GL_SIGNED_NEGATE_NV 0x853D
+#define GL_SCALE_BY_TWO_NV 0x853E
+#define GL_SCALE_BY_FOUR_NV 0x853F
+#define GL_SCALE_BY_ONE_HALF_NV 0x8540
+#define GL_BIAS_BY_NEGATIVE_ONE_HALF_NV 0x8541
+#define GL_COMBINER_INPUT_NV 0x8542
+#define GL_COMBINER_MAPPING_NV 0x8543
+#define GL_COMBINER_COMPONENT_USAGE_NV 0x8544
+#define GL_COMBINER_AB_DOT_PRODUCT_NV 0x8545
+#define GL_COMBINER_CD_DOT_PRODUCT_NV 0x8546
+#define GL_COMBINER_MUX_SUM_NV 0x8547
+#define GL_COMBINER_SCALE_NV 0x8548
+#define GL_COMBINER_BIAS_NV 0x8549
+#define GL_COMBINER_AB_OUTPUT_NV 0x854A
+#define GL_COMBINER_CD_OUTPUT_NV 0x854B
+#define GL_COMBINER_SUM_OUTPUT_NV 0x854C
+#define GL_MAX_GENERAL_COMBINERS_NV 0x854D
+#define GL_NUM_GENERAL_COMBINERS_NV 0x854E
+#define GL_COLOR_SUM_CLAMP_NV 0x854F
+#define GL_COMBINER0_NV 0x8550
+#define GL_COMBINER1_NV 0x8551
+#define GL_COMBINER2_NV 0x8552
+#define GL_COMBINER3_NV 0x8553
+#define GL_COMBINER4_NV 0x8554
+#define GL_COMBINER5_NV 0x8555
+#define GL_COMBINER6_NV 0x8556
+#define GL_COMBINER7_NV 0x8557
+/* reuse GL_TEXTURE0_ARB */
+/* reuse GL_TEXTURE1_ARB */
+/* reuse GL_ZERO */
+/* reuse GL_NONE */
+/* reuse GL_FOG */
+#endif
+
+#ifndef GL_NV_fog_distance
+#define GL_FOG_DISTANCE_MODE_NV 0x855A
+#define GL_EYE_RADIAL_NV 0x855B
+#define GL_EYE_PLANE_ABSOLUTE_NV 0x855C
+/* reuse GL_EYE_PLANE */
+#endif
+
+#ifndef GL_NV_texgen_emboss
+#define GL_EMBOSS_LIGHT_NV 0x855D
+#define GL_EMBOSS_CONSTANT_NV 0x855E
+#define GL_EMBOSS_MAP_NV 0x855F
+#endif
+
+#ifndef GL_NV_blend_square
+#endif
+
+#ifndef GL_NV_texture_env_combine4
+#define GL_COMBINE4_NV 0x8503
+#define GL_SOURCE3_RGB_NV 0x8583
+#define GL_SOURCE3_ALPHA_NV 0x858B
+#define GL_OPERAND3_RGB_NV 0x8593
+#define GL_OPERAND3_ALPHA_NV 0x859B
+#endif
+
+#ifndef GL_MESA_resize_buffers
+#endif
+
+#ifndef GL_MESA_window_pos
+#endif
+
+#ifndef GL_EXT_texture_compression_s3tc
+#define GL_COMPRESSED_RGB_S3TC_DXT1_EXT 0x83F0
+#define GL_COMPRESSED_RGBA_S3TC_DXT1_EXT 0x83F1
+#define GL_COMPRESSED_RGBA_S3TC_DXT3_EXT 0x83F2
+#define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT 0x83F3
+#endif
+
+#ifndef GL_IBM_cull_vertex
+#define GL_CULL_VERTEX_IBM 103050
+#endif
+
+#ifndef GL_IBM_multimode_draw_arrays
+#endif
+
+#ifndef GL_IBM_vertex_array_lists
+#define GL_VERTEX_ARRAY_LIST_IBM 103070
+#define GL_NORMAL_ARRAY_LIST_IBM 103071
+#define GL_COLOR_ARRAY_LIST_IBM 103072
+#define GL_INDEX_ARRAY_LIST_IBM 103073
+#define GL_TEXTURE_COORD_ARRAY_LIST_IBM 103074
+#define GL_EDGE_FLAG_ARRAY_LIST_IBM 103075
+#define GL_FOG_COORDINATE_ARRAY_LIST_IBM 103076
+#define GL_SECONDARY_COLOR_ARRAY_LIST_IBM 103077
+#define GL_VERTEX_ARRAY_LIST_STRIDE_IBM 103080
+#define GL_NORMAL_ARRAY_LIST_STRIDE_IBM 103081
+#define GL_COLOR_ARRAY_LIST_STRIDE_IBM 103082
+#define GL_INDEX_ARRAY_LIST_STRIDE_IBM 103083
+#define GL_TEXTURE_COORD_ARRAY_LIST_STRIDE_IBM 103084
+#define GL_EDGE_FLAG_ARRAY_LIST_STRIDE_IBM 103085
+#define GL_FOG_COORDINATE_ARRAY_LIST_STRIDE_IBM 103086
+#define GL_SECONDARY_COLOR_ARRAY_LIST_STRIDE_IBM 103087
+#endif
+
+#ifndef GL_SGIX_subsample
+#define GL_PACK_SUBSAMPLE_RATE_SGIX 0x85A0
+#define GL_UNPACK_SUBSAMPLE_RATE_SGIX 0x85A1
+#define GL_PIXEL_SUBSAMPLE_4444_SGIX 0x85A2
+#define GL_PIXEL_SUBSAMPLE_2424_SGIX 0x85A3
+#define GL_PIXEL_SUBSAMPLE_4242_SGIX 0x85A4
+#endif
+
+#ifndef GL_SGIX_ycrcb_subsample
+#endif
+
+#ifndef GL_SGIX_ycrcba
+#define GL_YCRCB_SGIX 0x8318
+#define GL_YCRCBA_SGIX 0x8319
+#endif
+
+#ifndef GL_SGI_depth_pass_instrument
+#define GL_DEPTH_PASS_INSTRUMENT_SGIX 0x8310
+#define GL_DEPTH_PASS_INSTRUMENT_COUNTERS_SGIX 0x8311
+#define GL_DEPTH_PASS_INSTRUMENT_MAX_SGIX 0x8312
+#endif
+
+#ifndef GL_3DFX_texture_compression_FXT1
+#define GL_COMPRESSED_RGB_FXT1_3DFX 0x86B0
+#define GL_COMPRESSED_RGBA_FXT1_3DFX 0x86B1
+#endif
+
+#ifndef GL_3DFX_multisample
+#define GL_MULTISAMPLE_3DFX 0x86B2
+#define GL_SAMPLE_BUFFERS_3DFX 0x86B3
+#define GL_SAMPLES_3DFX 0x86B4
+#define GL_MULTISAMPLE_BIT_3DFX 0x20000000
+#endif
+
+#ifndef GL_3DFX_tbuffer
+#endif
+
+#ifndef GL_EXT_multisample
+#define GL_MULTISAMPLE_EXT 0x809D
+#define GL_SAMPLE_ALPHA_TO_MASK_EXT 0x809E
+#define GL_SAMPLE_ALPHA_TO_ONE_EXT 0x809F
+#define GL_SAMPLE_MASK_EXT 0x80A0
+#define GL_1PASS_EXT 0x80A1
+#define GL_2PASS_0_EXT 0x80A2
+#define GL_2PASS_1_EXT 0x80A3
+#define GL_4PASS_0_EXT 0x80A4
+#define GL_4PASS_1_EXT 0x80A5
+#define GL_4PASS_2_EXT 0x80A6
+#define GL_4PASS_3_EXT 0x80A7
+#define GL_SAMPLE_BUFFERS_EXT 0x80A8
+#define GL_SAMPLES_EXT 0x80A9
+#define GL_SAMPLE_MASK_VALUE_EXT 0x80AA
+#define GL_SAMPLE_MASK_INVERT_EXT 0x80AB
+#define GL_SAMPLE_PATTERN_EXT 0x80AC
+#define GL_MULTISAMPLE_BIT_EXT 0x20000000
+#endif
+
+#ifndef GL_SGIX_vertex_preclip
+#define GL_VERTEX_PRECLIP_SGIX 0x83EE
+#define GL_VERTEX_PRECLIP_HINT_SGIX 0x83EF
+#endif
+
+#ifndef GL_SGIX_convolution_accuracy
+#define GL_CONVOLUTION_HINT_SGIX 0x8316
+#endif
+
+#ifndef GL_SGIX_resample
+#define GL_PACK_RESAMPLE_SGIX 0x842C
+#define GL_UNPACK_RESAMPLE_SGIX 0x842D
+#define GL_RESAMPLE_REPLICATE_SGIX 0x842E
+#define GL_RESAMPLE_ZERO_FILL_SGIX 0x842F
+#define GL_RESAMPLE_DECIMATE_SGIX 0x8430
+#endif
+
+#ifndef GL_SGIS_point_line_texgen
+#define GL_EYE_DISTANCE_TO_POINT_SGIS 0x81F0
+#define GL_OBJECT_DISTANCE_TO_POINT_SGIS 0x81F1
+#define GL_EYE_DISTANCE_TO_LINE_SGIS 0x81F2
+#define GL_OBJECT_DISTANCE_TO_LINE_SGIS 0x81F3
+#define GL_EYE_POINT_SGIS 0x81F4
+#define GL_OBJECT_POINT_SGIS 0x81F5
+#define GL_EYE_LINE_SGIS 0x81F6
+#define GL_OBJECT_LINE_SGIS 0x81F7
+#endif
+
+#ifndef GL_SGIS_texture_color_mask
+#define GL_TEXTURE_COLOR_WRITEMASK_SGIS 0x81EF
+#endif
+
+#ifndef GL_EXT_texture_env_dot3
+#define GL_DOT3_RGB_EXT 0x8740
+#define GL_DOT3_RGBA_EXT 0x8741
+#endif
+
+#ifndef GL_ATI_texture_mirror_once
+#define GL_MIRROR_CLAMP_ATI 0x8742
+#define GL_MIRROR_CLAMP_TO_EDGE_ATI 0x8743
+#endif
+
+#ifndef GL_NV_fence
+#define GL_ALL_COMPLETED_NV 0x84F2
+#define GL_FENCE_STATUS_NV 0x84F3
+#define GL_FENCE_CONDITION_NV 0x84F4
+#endif
+
+#ifndef GL_IBM_texture_mirrored_repeat
+#define GL_MIRRORED_REPEAT_IBM 0x8370
+#endif
+
+#ifndef GL_NV_evaluators
+#define GL_EVAL_2D_NV 0x86C0
+#define GL_EVAL_TRIANGULAR_2D_NV 0x86C1
+#define GL_MAP_TESSELLATION_NV 0x86C2
+#define GL_MAP_ATTRIB_U_ORDER_NV 0x86C3
+#define GL_MAP_ATTRIB_V_ORDER_NV 0x86C4
+#define GL_EVAL_FRACTIONAL_TESSELLATION_NV 0x86C5
+#define GL_EVAL_VERTEX_ATTRIB0_NV 0x86C6
+#define GL_EVAL_VERTEX_ATTRIB1_NV 0x86C7
+#define GL_EVAL_VERTEX_ATTRIB2_NV 0x86C8
+#define GL_EVAL_VERTEX_ATTRIB3_NV 0x86C9
+#define GL_EVAL_VERTEX_ATTRIB4_NV 0x86CA
+#define GL_EVAL_VERTEX_ATTRIB5_NV 0x86CB
+#define GL_EVAL_VERTEX_ATTRIB6_NV 0x86CC
+#define GL_EVAL_VERTEX_ATTRIB7_NV 0x86CD
+#define GL_EVAL_VERTEX_ATTRIB8_NV 0x86CE
+#define GL_EVAL_VERTEX_ATTRIB9_NV 0x86CF
+#define GL_EVAL_VERTEX_ATTRIB10_NV 0x86D0
+#define GL_EVAL_VERTEX_ATTRIB11_NV 0x86D1
+#define GL_EVAL_VERTEX_ATTRIB12_NV 0x86D2
+#define GL_EVAL_VERTEX_ATTRIB13_NV 0x86D3
+#define GL_EVAL_VERTEX_ATTRIB14_NV 0x86D4
+#define GL_EVAL_VERTEX_ATTRIB15_NV 0x86D5
+#define GL_MAX_MAP_TESSELLATION_NV 0x86D6
+#define GL_MAX_RATIONAL_EVAL_ORDER_NV 0x86D7
+#endif
+
+#ifndef GL_NV_packed_depth_stencil
+#define GL_DEPTH_STENCIL_NV 0x84F9
+#define GL_UNSIGNED_INT_24_8_NV 0x84FA
+#endif
+
+#ifndef GL_NV_register_combiners2
+#define GL_PER_STAGE_CONSTANTS_NV 0x8535
+#endif
+
+#ifndef GL_NV_texture_compression_vtc
+#endif
+
+#ifndef GL_NV_texture_rectangle
+#define GL_TEXTURE_RECTANGLE_NV 0x84F5
+#define GL_TEXTURE_BINDING_RECTANGLE_NV 0x84F6
+#define GL_PROXY_TEXTURE_RECTANGLE_NV 0x84F7
+#define GL_MAX_RECTANGLE_TEXTURE_SIZE_NV 0x84F8
+#endif
+
+#ifndef GL_NV_texture_shader
+#define GL_OFFSET_TEXTURE_RECTANGLE_NV 0x864C
+#define GL_OFFSET_TEXTURE_RECTANGLE_SCALE_NV 0x864D
+#define GL_DOT_PRODUCT_TEXTURE_RECTANGLE_NV 0x864E
+#define GL_RGBA_UNSIGNED_DOT_PRODUCT_MAPPING_NV 0x86D9
+#define GL_UNSIGNED_INT_S8_S8_8_8_NV 0x86DA
+#define GL_UNSIGNED_INT_8_8_S8_S8_REV_NV 0x86DB
+#define GL_DSDT_MAG_INTENSITY_NV 0x86DC
+#define GL_SHADER_CONSISTENT_NV 0x86DD
+#define GL_TEXTURE_SHADER_NV 0x86DE
+#define GL_SHADER_OPERATION_NV 0x86DF
+#define GL_CULL_MODES_NV 0x86E0
+#define GL_OFFSET_TEXTURE_MATRIX_NV 0x86E1
+#define GL_OFFSET_TEXTURE_SCALE_NV 0x86E2
+#define GL_OFFSET_TEXTURE_BIAS_NV 0x86E3
+#define GL_OFFSET_TEXTURE_2D_MATRIX_NV GL_OFFSET_TEXTURE_MATRIX_NV
+#define GL_OFFSET_TEXTURE_2D_SCALE_NV GL_OFFSET_TEXTURE_SCALE_NV
+#define GL_OFFSET_TEXTURE_2D_BIAS_NV GL_OFFSET_TEXTURE_BIAS_NV
+#define GL_PREVIOUS_TEXTURE_INPUT_NV 0x86E4
+#define GL_CONST_EYE_NV 0x86E5
+#define GL_PASS_THROUGH_NV 0x86E6
+#define GL_CULL_FRAGMENT_NV 0x86E7
+#define GL_OFFSET_TEXTURE_2D_NV 0x86E8
+#define GL_DEPENDENT_AR_TEXTURE_2D_NV 0x86E9
+#define GL_DEPENDENT_GB_TEXTURE_2D_NV 0x86EA
+#define GL_DOT_PRODUCT_NV 0x86EC
+#define GL_DOT_PRODUCT_DEPTH_REPLACE_NV 0x86ED
+#define GL_DOT_PRODUCT_TEXTURE_2D_NV 0x86EE
+#define GL_DOT_PRODUCT_TEXTURE_CUBE_MAP_NV 0x86F0
+#define GL_DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV 0x86F1
+#define GL_DOT_PRODUCT_REFLECT_CUBE_MAP_NV 0x86F2
+#define GL_DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV 0x86F3
+#define GL_HILO_NV 0x86F4
+#define GL_DSDT_NV 0x86F5
+#define GL_DSDT_MAG_NV 0x86F6
+#define GL_DSDT_MAG_VIB_NV 0x86F7
+#define GL_HILO16_NV 0x86F8
+#define GL_SIGNED_HILO_NV 0x86F9
+#define GL_SIGNED_HILO16_NV 0x86FA
+#define GL_SIGNED_RGBA_NV 0x86FB
+#define GL_SIGNED_RGBA8_NV 0x86FC
+#define GL_SIGNED_RGB_NV 0x86FE
+#define GL_SIGNED_RGB8_NV 0x86FF
+#define GL_SIGNED_LUMINANCE_NV 0x8701
+#define GL_SIGNED_LUMINANCE8_NV 0x8702
+#define GL_SIGNED_LUMINANCE_ALPHA_NV 0x8703
+#define GL_SIGNED_LUMINANCE8_ALPHA8_NV 0x8704
+#define GL_SIGNED_ALPHA_NV 0x8705
+#define GL_SIGNED_ALPHA8_NV 0x8706
+#define GL_SIGNED_INTENSITY_NV 0x8707
+#define GL_SIGNED_INTENSITY8_NV 0x8708
+#define GL_DSDT8_NV 0x8709
+#define GL_DSDT8_MAG8_NV 0x870A
+#define GL_DSDT8_MAG8_INTENSITY8_NV 0x870B
+#define GL_SIGNED_RGB_UNSIGNED_ALPHA_NV 0x870C
+#define GL_SIGNED_RGB8_UNSIGNED_ALPHA8_NV 0x870D
+#define GL_HI_SCALE_NV 0x870E
+#define GL_LO_SCALE_NV 0x870F
+#define GL_DS_SCALE_NV 0x8710
+#define GL_DT_SCALE_NV 0x8711
+#define GL_MAGNITUDE_SCALE_NV 0x8712
+#define GL_VIBRANCE_SCALE_NV 0x8713
+#define GL_HI_BIAS_NV 0x8714
+#define GL_LO_BIAS_NV 0x8715
+#define GL_DS_BIAS_NV 0x8716
+#define GL_DT_BIAS_NV 0x8717
+#define GL_MAGNITUDE_BIAS_NV 0x8718
+#define GL_VIBRANCE_BIAS_NV 0x8719
+#define GL_TEXTURE_BORDER_VALUES_NV 0x871A
+#define GL_TEXTURE_HI_SIZE_NV 0x871B
+#define GL_TEXTURE_LO_SIZE_NV 0x871C
+#define GL_TEXTURE_DS_SIZE_NV 0x871D
+#define GL_TEXTURE_DT_SIZE_NV 0x871E
+#define GL_TEXTURE_MAG_SIZE_NV 0x871F
+#endif
+
+#ifndef GL_NV_texture_shader2
+#define GL_DOT_PRODUCT_TEXTURE_3D_NV 0x86EF
+#endif
+
+#ifndef GL_NV_vertex_array_range2
+#define GL_VERTEX_ARRAY_RANGE_WITHOUT_FLUSH_NV 0x8533
+#endif
+
+#ifndef GL_NV_vertex_program
+#define GL_VERTEX_PROGRAM_NV 0x8620
+#define GL_VERTEX_STATE_PROGRAM_NV 0x8621
+#define GL_ATTRIB_ARRAY_SIZE_NV 0x8623
+#define GL_ATTRIB_ARRAY_STRIDE_NV 0x8624
+#define GL_ATTRIB_ARRAY_TYPE_NV 0x8625
+#define GL_CURRENT_ATTRIB_NV 0x8626
+#define GL_PROGRAM_LENGTH_NV 0x8627
+#define GL_PROGRAM_STRING_NV 0x8628
+#define GL_MODELVIEW_PROJECTION_NV 0x8629
+#define GL_IDENTITY_NV 0x862A
+#define GL_INVERSE_NV 0x862B
+#define GL_TRANSPOSE_NV 0x862C
+#define GL_INVERSE_TRANSPOSE_NV 0x862D
+#define GL_MAX_TRACK_MATRIX_STACK_DEPTH_NV 0x862E
+#define GL_MAX_TRACK_MATRICES_NV 0x862F
+#define GL_MATRIX0_NV 0x8630
+#define GL_MATRIX1_NV 0x8631
+#define GL_MATRIX2_NV 0x8632
+#define GL_MATRIX3_NV 0x8633
+#define GL_MATRIX4_NV 0x8634
+#define GL_MATRIX5_NV 0x8635
+#define GL_MATRIX6_NV 0x8636
+#define GL_MATRIX7_NV 0x8637
+#define GL_CURRENT_MATRIX_STACK_DEPTH_NV 0x8640
+#define GL_CURRENT_MATRIX_NV 0x8641
+#define GL_VERTEX_PROGRAM_POINT_SIZE_NV 0x8642
+#define GL_VERTEX_PROGRAM_TWO_SIDE_NV 0x8643
+#define GL_PROGRAM_PARAMETER_NV 0x8644
+#define GL_ATTRIB_ARRAY_POINTER_NV 0x8645
+#define GL_PROGRAM_TARGET_NV 0x8646
+#define GL_PROGRAM_RESIDENT_NV 0x8647
+#define GL_TRACK_MATRIX_NV 0x8648
+#define GL_TRACK_MATRIX_TRANSFORM_NV 0x8649
+#define GL_VERTEX_PROGRAM_BINDING_NV 0x864A
+#define GL_PROGRAM_ERROR_POSITION_NV 0x864B
+#define GL_VERTEX_ATTRIB_ARRAY0_NV 0x8650
+#define GL_VERTEX_ATTRIB_ARRAY1_NV 0x8651
+#define GL_VERTEX_ATTRIB_ARRAY2_NV 0x8652
+#define GL_VERTEX_ATTRIB_ARRAY3_NV 0x8653
+#define GL_VERTEX_ATTRIB_ARRAY4_NV 0x8654
+#define GL_VERTEX_ATTRIB_ARRAY5_NV 0x8655
+#define GL_VERTEX_ATTRIB_ARRAY6_NV 0x8656
+#define GL_VERTEX_ATTRIB_ARRAY7_NV 0x8657
+#define GL_VERTEX_ATTRIB_ARRAY8_NV 0x8658
+#define GL_VERTEX_ATTRIB_ARRAY9_NV 0x8659
+#define GL_VERTEX_ATTRIB_ARRAY10_NV 0x865A
+#define GL_VERTEX_ATTRIB_ARRAY11_NV 0x865B
+#define GL_VERTEX_ATTRIB_ARRAY12_NV 0x865C
+#define GL_VERTEX_ATTRIB_ARRAY13_NV 0x865D
+#define GL_VERTEX_ATTRIB_ARRAY14_NV 0x865E
+#define GL_VERTEX_ATTRIB_ARRAY15_NV 0x865F
+#define GL_MAP1_VERTEX_ATTRIB0_4_NV 0x8660
+#define GL_MAP1_VERTEX_ATTRIB1_4_NV 0x8661
+#define GL_MAP1_VERTEX_ATTRIB2_4_NV 0x8662
+#define GL_MAP1_VERTEX_ATTRIB3_4_NV 0x8663
+#define GL_MAP1_VERTEX_ATTRIB4_4_NV 0x8664
+#define GL_MAP1_VERTEX_ATTRIB5_4_NV 0x8665
+#define GL_MAP1_VERTEX_ATTRIB6_4_NV 0x8666
+#define GL_MAP1_VERTEX_ATTRIB7_4_NV 0x8667
+#define GL_MAP1_VERTEX_ATTRIB8_4_NV 0x8668
+#define GL_MAP1_VERTEX_ATTRIB9_4_NV 0x8669
+#define GL_MAP1_VERTEX_ATTRIB10_4_NV 0x866A
+#define GL_MAP1_VERTEX_ATTRIB11_4_NV 0x866B
+#define GL_MAP1_VERTEX_ATTRIB12_4_NV 0x866C
+#define GL_MAP1_VERTEX_ATTRIB13_4_NV 0x866D
+#define GL_MAP1_VERTEX_ATTRIB14_4_NV 0x866E
+#define GL_MAP1_VERTEX_ATTRIB15_4_NV 0x866F
+#define GL_MAP2_VERTEX_ATTRIB0_4_NV 0x8670
+#define GL_MAP2_VERTEX_ATTRIB1_4_NV 0x8671
+#define GL_MAP2_VERTEX_ATTRIB2_4_NV 0x8672
+#define GL_MAP2_VERTEX_ATTRIB3_4_NV 0x8673
+#define GL_MAP2_VERTEX_ATTRIB4_4_NV 0x8674
+#define GL_MAP2_VERTEX_ATTRIB5_4_NV 0x8675
+#define GL_MAP2_VERTEX_ATTRIB6_4_NV 0x8676
+#define GL_MAP2_VERTEX_ATTRIB7_4_NV 0x8677
+#define GL_MAP2_VERTEX_ATTRIB8_4_NV 0x8678
+#define GL_MAP2_VERTEX_ATTRIB9_4_NV 0x8679
+#define GL_MAP2_VERTEX_ATTRIB10_4_NV 0x867A
+#define GL_MAP2_VERTEX_ATTRIB11_4_NV 0x867B
+#define GL_MAP2_VERTEX_ATTRIB12_4_NV 0x867C
+#define GL_MAP2_VERTEX_ATTRIB13_4_NV 0x867D
+#define GL_MAP2_VERTEX_ATTRIB14_4_NV 0x867E
+#define GL_MAP2_VERTEX_ATTRIB15_4_NV 0x867F
+#endif
+
+#ifndef GL_SGIX_texture_coordinate_clamp
+#define GL_TEXTURE_MAX_CLAMP_S_SGIX 0x8369
+#define GL_TEXTURE_MAX_CLAMP_T_SGIX 0x836A
+#define GL_TEXTURE_MAX_CLAMP_R_SGIX 0x836B
+#endif
+
+#ifndef GL_SGIX_scalebias_hint
+#define GL_SCALEBIAS_HINT_SGIX 0x8322
+#endif
+
+#ifndef GL_OML_interlace
+#define GL_INTERLACE_OML 0x8980
+#define GL_INTERLACE_READ_OML 0x8981
+#endif
+
+#ifndef GL_OML_subsample
+#define GL_FORMAT_SUBSAMPLE_24_24_OML 0x8982
+#define GL_FORMAT_SUBSAMPLE_244_244_OML 0x8983
+#endif
+
+#ifndef GL_OML_resample
+#define GL_PACK_RESAMPLE_OML 0x8984
+#define GL_UNPACK_RESAMPLE_OML 0x8985
+#define GL_RESAMPLE_REPLICATE_OML 0x8986
+#define GL_RESAMPLE_ZERO_FILL_OML 0x8987
+#define GL_RESAMPLE_AVERAGE_OML 0x8988
+#define GL_RESAMPLE_DECIMATE_OML 0x8989
+#endif
+
+#ifndef GL_NV_copy_depth_to_color
+#define GL_DEPTH_STENCIL_TO_RGBA_NV 0x886E
+#define GL_DEPTH_STENCIL_TO_BGRA_NV 0x886F
+#endif
+
+#ifndef GL_ATI_envmap_bumpmap
+#define GL_BUMP_ROT_MATRIX_ATI 0x8775
+#define GL_BUMP_ROT_MATRIX_SIZE_ATI 0x8776
+#define GL_BUMP_NUM_TEX_UNITS_ATI 0x8777
+#define GL_BUMP_TEX_UNITS_ATI 0x8778
+#define GL_DUDV_ATI 0x8779
+#define GL_DU8DV8_ATI 0x877A
+#define GL_BUMP_ENVMAP_ATI 0x877B
+#define GL_BUMP_TARGET_ATI 0x877C
+#endif
+
+#ifndef GL_ATI_fragment_shader
+#define GL_FRAGMENT_SHADER_ATI 0x8920
+#define GL_REG_0_ATI 0x8921
+#define GL_REG_1_ATI 0x8922
+#define GL_REG_2_ATI 0x8923
+#define GL_REG_3_ATI 0x8924
+#define GL_REG_4_ATI 0x8925
+#define GL_REG_5_ATI 0x8926
+#define GL_REG_6_ATI 0x8927
+#define GL_REG_7_ATI 0x8928
+#define GL_REG_8_ATI 0x8929
+#define GL_REG_9_ATI 0x892A
+#define GL_REG_10_ATI 0x892B
+#define GL_REG_11_ATI 0x892C
+#define GL_REG_12_ATI 0x892D
+#define GL_REG_13_ATI 0x892E
+#define GL_REG_14_ATI 0x892F
+#define GL_REG_15_ATI 0x8930
+#define GL_REG_16_ATI 0x8931
+#define GL_REG_17_ATI 0x8932
+#define GL_REG_18_ATI 0x8933
+#define GL_REG_19_ATI 0x8934
+#define GL_REG_20_ATI 0x8935
+#define GL_REG_21_ATI 0x8936
+#define GL_REG_22_ATI 0x8937
+#define GL_REG_23_ATI 0x8938
+#define GL_REG_24_ATI 0x8939
+#define GL_REG_25_ATI 0x893A
+#define GL_REG_26_ATI 0x893B
+#define GL_REG_27_ATI 0x893C
+#define GL_REG_28_ATI 0x893D
+#define GL_REG_29_ATI 0x893E
+#define GL_REG_30_ATI 0x893F
+#define GL_REG_31_ATI 0x8940
+#define GL_CON_0_ATI 0x8941
+#define GL_CON_1_ATI 0x8942
+#define GL_CON_2_ATI 0x8943
+#define GL_CON_3_ATI 0x8944
+#define GL_CON_4_ATI 0x8945
+#define GL_CON_5_ATI 0x8946
+#define GL_CON_6_ATI 0x8947
+#define GL_CON_7_ATI 0x8948
+#define GL_CON_8_ATI 0x8949
+#define GL_CON_9_ATI 0x894A
+#define GL_CON_10_ATI 0x894B
+#define GL_CON_11_ATI 0x894C
+#define GL_CON_12_ATI 0x894D
+#define GL_CON_13_ATI 0x894E
+#define GL_CON_14_ATI 0x894F
+#define GL_CON_15_ATI 0x8950
+#define GL_CON_16_ATI 0x8951
+#define GL_CON_17_ATI 0x8952
+#define GL_CON_18_ATI 0x8953
+#define GL_CON_19_ATI 0x8954
+#define GL_CON_20_ATI 0x8955
+#define GL_CON_21_ATI 0x8956
+#define GL_CON_22_ATI 0x8957
+#define GL_CON_23_ATI 0x8958
+#define GL_CON_24_ATI 0x8959
+#define GL_CON_25_ATI 0x895A
+#define GL_CON_26_ATI 0x895B
+#define GL_CON_27_ATI 0x895C
+#define GL_CON_28_ATI 0x895D
+#define GL_CON_29_ATI 0x895E
+#define GL_CON_30_ATI 0x895F
+#define GL_CON_31_ATI 0x8960
+#define GL_MOV_ATI 0x8961
+#define GL_ADD_ATI 0x8963
+#define GL_MUL_ATI 0x8964
+#define GL_SUB_ATI 0x8965
+#define GL_DOT3_ATI 0x8966
+#define GL_DOT4_ATI 0x8967
+#define GL_MAD_ATI 0x8968
+#define GL_LERP_ATI 0x8969
+#define GL_CND_ATI 0x896A
+#define GL_CND0_ATI 0x896B
+#define GL_DOT2_ADD_ATI 0x896C
+#define GL_SECONDARY_INTERPOLATOR_ATI 0x896D
+#define GL_NUM_FRAGMENT_REGISTERS_ATI 0x896E
+#define GL_NUM_FRAGMENT_CONSTANTS_ATI 0x896F
+#define GL_NUM_PASSES_ATI 0x8970
+#define GL_NUM_INSTRUCTIONS_PER_PASS_ATI 0x8971
+#define GL_NUM_INSTRUCTIONS_TOTAL_ATI 0x8972
+#define GL_NUM_INPUT_INTERPOLATOR_COMPONENTS_ATI 0x8973
+#define GL_NUM_LOOPBACK_COMPONENTS_ATI 0x8974
+#define GL_COLOR_ALPHA_PAIRING_ATI 0x8975
+#define GL_SWIZZLE_STR_ATI 0x8976
+#define GL_SWIZZLE_STQ_ATI 0x8977
+#define GL_SWIZZLE_STR_DR_ATI 0x8978
+#define GL_SWIZZLE_STQ_DQ_ATI 0x8979
+#define GL_SWIZZLE_STRQ_ATI 0x897A
+#define GL_SWIZZLE_STRQ_DQ_ATI 0x897B
+#define GL_RED_BIT_ATI 0x00000001
+#define GL_GREEN_BIT_ATI 0x00000002
+#define GL_BLUE_BIT_ATI 0x00000004
+#define GL_2X_BIT_ATI 0x00000001
+#define GL_4X_BIT_ATI 0x00000002
+#define GL_8X_BIT_ATI 0x00000004
+#define GL_HALF_BIT_ATI 0x00000008
+#define GL_QUARTER_BIT_ATI 0x00000010
+#define GL_EIGHTH_BIT_ATI 0x00000020
+#define GL_SATURATE_BIT_ATI 0x00000040
+#define GL_COMP_BIT_ATI 0x00000002
+#define GL_NEGATE_BIT_ATI 0x00000004
+#define GL_BIAS_BIT_ATI 0x00000008
+#endif
+
+#ifndef GL_ATI_pn_triangles
+#define GL_PN_TRIANGLES_ATI 0x87F0
+#define GL_MAX_PN_TRIANGLES_TESSELATION_LEVEL_ATI 0x87F1
+#define GL_PN_TRIANGLES_POINT_MODE_ATI 0x87F2
+#define GL_PN_TRIANGLES_NORMAL_MODE_ATI 0x87F3
+#define GL_PN_TRIANGLES_TESSELATION_LEVEL_ATI 0x87F4
+#define GL_PN_TRIANGLES_POINT_MODE_LINEAR_ATI 0x87F5
+#define GL_PN_TRIANGLES_POINT_MODE_CUBIC_ATI 0x87F6
+#define GL_PN_TRIANGLES_NORMAL_MODE_LINEAR_ATI 0x87F7
+#define GL_PN_TRIANGLES_NORMAL_MODE_QUADRATIC_ATI 0x87F8
+#endif
+
+#ifndef GL_ATI_vertex_array_object
+#define GL_STATIC_ATI 0x8760
+#define GL_DYNAMIC_ATI 0x8761
+#define GL_PRESERVE_ATI 0x8762
+#define GL_DISCARD_ATI 0x8763
+#define GL_OBJECT_BUFFER_SIZE_ATI 0x8764
+#define GL_OBJECT_BUFFER_USAGE_ATI 0x8765
+#define GL_ARRAY_OBJECT_BUFFER_ATI 0x8766
+#define GL_ARRAY_OBJECT_OFFSET_ATI 0x8767
+#endif
+
+#ifndef GL_EXT_vertex_shader
+#define GL_VERTEX_SHADER_EXT 0x8780
+#define GL_VERTEX_SHADER_BINDING_EXT 0x8781
+#define GL_OP_INDEX_EXT 0x8782
+#define GL_OP_NEGATE_EXT 0x8783
+#define GL_OP_DOT3_EXT 0x8784
+#define GL_OP_DOT4_EXT 0x8785
+#define GL_OP_MUL_EXT 0x8786
+#define GL_OP_ADD_EXT 0x8787
+#define GL_OP_MADD_EXT 0x8788
+#define GL_OP_FRAC_EXT 0x8789
+#define GL_OP_MAX_EXT 0x878A
+#define GL_OP_MIN_EXT 0x878B
+#define GL_OP_SET_GE_EXT 0x878C
+#define GL_OP_SET_LT_EXT 0x878D
+#define GL_OP_CLAMP_EXT 0x878E
+#define GL_OP_FLOOR_EXT 0x878F
+#define GL_OP_ROUND_EXT 0x8790
+#define GL_OP_EXP_BASE_2_EXT 0x8791
+#define GL_OP_LOG_BASE_2_EXT 0x8792
+#define GL_OP_POWER_EXT 0x8793
+#define GL_OP_RECIP_EXT 0x8794
+#define GL_OP_RECIP_SQRT_EXT 0x8795
+#define GL_OP_SUB_EXT 0x8796
+#define GL_OP_CROSS_PRODUCT_EXT 0x8797
+#define GL_OP_MULTIPLY_MATRIX_EXT 0x8798
+#define GL_OP_MOV_EXT 0x8799
+#define GL_OUTPUT_VERTEX_EXT 0x879A
+#define GL_OUTPUT_COLOR0_EXT 0x879B
+#define GL_OUTPUT_COLOR1_EXT 0x879C
+#define GL_OUTPUT_TEXTURE_COORD0_EXT 0x879D
+#define GL_OUTPUT_TEXTURE_COORD1_EXT 0x879E
+#define GL_OUTPUT_TEXTURE_COORD2_EXT 0x879F
+#define GL_OUTPUT_TEXTURE_COORD3_EXT 0x87A0
+#define GL_OUTPUT_TEXTURE_COORD4_EXT 0x87A1
+#define GL_OUTPUT_TEXTURE_COORD5_EXT 0x87A2
+#define GL_OUTPUT_TEXTURE_COORD6_EXT 0x87A3
+#define GL_OUTPUT_TEXTURE_COORD7_EXT 0x87A4
+#define GL_OUTPUT_TEXTURE_COORD8_EXT 0x87A5
+#define GL_OUTPUT_TEXTURE_COORD9_EXT 0x87A6
+#define GL_OUTPUT_TEXTURE_COORD10_EXT 0x87A7
+#define GL_OUTPUT_TEXTURE_COORD11_EXT 0x87A8
+#define GL_OUTPUT_TEXTURE_COORD12_EXT 0x87A9
+#define GL_OUTPUT_TEXTURE_COORD13_EXT 0x87AA
+#define GL_OUTPUT_TEXTURE_COORD14_EXT 0x87AB
+#define GL_OUTPUT_TEXTURE_COORD15_EXT 0x87AC
+#define GL_OUTPUT_TEXTURE_COORD16_EXT 0x87AD
+#define GL_OUTPUT_TEXTURE_COORD17_EXT 0x87AE
+#define GL_OUTPUT_TEXTURE_COORD18_EXT 0x87AF
+#define GL_OUTPUT_TEXTURE_COORD19_EXT 0x87B0
+#define GL_OUTPUT_TEXTURE_COORD20_EXT 0x87B1
+#define GL_OUTPUT_TEXTURE_COORD21_EXT 0x87B2
+#define GL_OUTPUT_TEXTURE_COORD22_EXT 0x87B3
+#define GL_OUTPUT_TEXTURE_COORD23_EXT 0x87B4
+#define GL_OUTPUT_TEXTURE_COORD24_EXT 0x87B5
+#define GL_OUTPUT_TEXTURE_COORD25_EXT 0x87B6
+#define GL_OUTPUT_TEXTURE_COORD26_EXT 0x87B7
+#define GL_OUTPUT_TEXTURE_COORD27_EXT 0x87B8
+#define GL_OUTPUT_TEXTURE_COORD28_EXT 0x87B9
+#define GL_OUTPUT_TEXTURE_COORD29_EXT 0x87BA
+#define GL_OUTPUT_TEXTURE_COORD30_EXT 0x87BB
+#define GL_OUTPUT_TEXTURE_COORD31_EXT 0x87BC
+#define GL_OUTPUT_FOG_EXT 0x87BD
+#define GL_SCALAR_EXT 0x87BE
+#define GL_VECTOR_EXT 0x87BF
+#define GL_MATRIX_EXT 0x87C0
+#define GL_VARIANT_EXT 0x87C1
+#define GL_INVARIANT_EXT 0x87C2
+#define GL_LOCAL_CONSTANT_EXT 0x87C3
+#define GL_LOCAL_EXT 0x87C4
+#define GL_MAX_VERTEX_SHADER_INSTRUCTIONS_EXT 0x87C5
+#define GL_MAX_VERTEX_SHADER_VARIANTS_EXT 0x87C6
+#define GL_MAX_VERTEX_SHADER_INVARIANTS_EXT 0x87C7
+#define GL_MAX_VERTEX_SHADER_LOCAL_CONSTANTS_EXT 0x87C8
+#define GL_MAX_VERTEX_SHADER_LOCALS_EXT 0x87C9
+#define GL_MAX_OPTIMIZED_VERTEX_SHADER_INSTRUCTIONS_EXT 0x87CA
+#define GL_MAX_OPTIMIZED_VERTEX_SHADER_VARIANTS_EXT 0x87CB
+#define GL_MAX_OPTIMIZED_VERTEX_SHADER_LOCAL_CONSTANTS_EXT 0x87CC
+#define GL_MAX_OPTIMIZED_VERTEX_SHADER_INVARIANTS_EXT 0x87CD
+#define GL_MAX_OPTIMIZED_VERTEX_SHADER_LOCALS_EXT 0x87CE
+#define GL_VERTEX_SHADER_INSTRUCTIONS_EXT 0x87CF
+#define GL_VERTEX_SHADER_VARIANTS_EXT 0x87D0
+#define GL_VERTEX_SHADER_INVARIANTS_EXT 0x87D1
+#define GL_VERTEX_SHADER_LOCAL_CONSTANTS_EXT 0x87D2
+#define GL_VERTEX_SHADER_LOCALS_EXT 0x87D3
+#define GL_VERTEX_SHADER_OPTIMIZED_EXT 0x87D4
+#define GL_X_EXT 0x87D5
+#define GL_Y_EXT 0x87D6
+#define GL_Z_EXT 0x87D7
+#define GL_W_EXT 0x87D8
+#define GL_NEGATIVE_X_EXT 0x87D9
+#define GL_NEGATIVE_Y_EXT 0x87DA
+#define GL_NEGATIVE_Z_EXT 0x87DB
+#define GL_NEGATIVE_W_EXT 0x87DC
+#define GL_ZERO_EXT 0x87DD
+#define GL_ONE_EXT 0x87DE
+#define GL_NEGATIVE_ONE_EXT 0x87DF
+#define GL_NORMALIZED_RANGE_EXT 0x87E0
+#define GL_FULL_RANGE_EXT 0x87E1
+#define GL_CURRENT_VERTEX_EXT 0x87E2
+#define GL_MVP_MATRIX_EXT 0x87E3
+#define GL_VARIANT_VALUE_EXT 0x87E4
+#define GL_VARIANT_DATATYPE_EXT 0x87E5
+#define GL_VARIANT_ARRAY_STRIDE_EXT 0x87E6
+#define GL_VARIANT_ARRAY_TYPE_EXT 0x87E7
+#define GL_VARIANT_ARRAY_EXT 0x87E8
+#define GL_VARIANT_ARRAY_POINTER_EXT 0x87E9
+#define GL_INVARIANT_VALUE_EXT 0x87EA
+#define GL_INVARIANT_DATATYPE_EXT 0x87EB
+#define GL_LOCAL_CONSTANT_VALUE_EXT 0x87EC
+#define GL_LOCAL_CONSTANT_DATATYPE_EXT 0x87ED
+#endif
+
+#ifndef GL_ATI_vertex_streams
+#define GL_MAX_VERTEX_STREAMS_ATI 0x876B
+#define GL_VERTEX_STREAM0_ATI 0x876C
+#define GL_VERTEX_STREAM1_ATI 0x876D
+#define GL_VERTEX_STREAM2_ATI 0x876E
+#define GL_VERTEX_STREAM3_ATI 0x876F
+#define GL_VERTEX_STREAM4_ATI 0x8770
+#define GL_VERTEX_STREAM5_ATI 0x8771
+#define GL_VERTEX_STREAM6_ATI 0x8772
+#define GL_VERTEX_STREAM7_ATI 0x8773
+#define GL_VERTEX_SOURCE_ATI 0x8774
+#endif
+
+#ifndef GL_ATI_element_array
+#define GL_ELEMENT_ARRAY_ATI 0x8768
+#define GL_ELEMENT_ARRAY_TYPE_ATI 0x8769
+#define GL_ELEMENT_ARRAY_POINTER_ATI 0x876A
+#endif
+
+#ifndef GL_SUN_mesh_array
+#define GL_QUAD_MESH_SUN 0x8614
+#define GL_TRIANGLE_MESH_SUN 0x8615
+#endif
+
+#ifndef GL_SUN_slice_accum
+#define GL_SLICE_ACCUM_SUN 0x85CC
+#endif
+
+#ifndef GL_NV_multisample_filter_hint
+#define GL_MULTISAMPLE_FILTER_HINT_NV 0x8534
+#endif
+
+#ifndef GL_NV_depth_clamp
+#define GL_DEPTH_CLAMP_NV 0x864F
+#endif
+
+#ifndef GL_NV_occlusion_query
+#define GL_PIXEL_COUNTER_BITS_NV 0x8864
+#define GL_CURRENT_OCCLUSION_QUERY_ID_NV 0x8865
+#define GL_PIXEL_COUNT_NV 0x8866
+#define GL_PIXEL_COUNT_AVAILABLE_NV 0x8867
+#endif
+
+#ifndef GL_NV_point_sprite
+#define GL_POINT_SPRITE_NV 0x8861
+#define GL_COORD_REPLACE_NV 0x8862
+#define GL_POINT_SPRITE_R_MODE_NV 0x8863
+#endif
+
+#ifndef GL_NV_texture_shader3
+#define GL_OFFSET_PROJECTIVE_TEXTURE_2D_NV 0x8850
+#define GL_OFFSET_PROJECTIVE_TEXTURE_2D_SCALE_NV 0x8851
+#define GL_OFFSET_PROJECTIVE_TEXTURE_RECTANGLE_NV 0x8852
+#define GL_OFFSET_PROJECTIVE_TEXTURE_RECTANGLE_SCALE_NV 0x8853
+#define GL_OFFSET_HILO_TEXTURE_2D_NV 0x8854
+#define GL_OFFSET_HILO_TEXTURE_RECTANGLE_NV 0x8855
+#define GL_OFFSET_HILO_PROJECTIVE_TEXTURE_2D_NV 0x8856
+#define GL_OFFSET_HILO_PROJECTIVE_TEXTURE_RECTANGLE_NV 0x8857
+#define GL_DEPENDENT_HILO_TEXTURE_2D_NV 0x8858
+#define GL_DEPENDENT_RGB_TEXTURE_3D_NV 0x8859
+#define GL_DEPENDENT_RGB_TEXTURE_CUBE_MAP_NV 0x885A
+#define GL_DOT_PRODUCT_PASS_THROUGH_NV 0x885B
+#define GL_DOT_PRODUCT_TEXTURE_1D_NV 0x885C
+#define GL_DOT_PRODUCT_AFFINE_DEPTH_REPLACE_NV 0x885D
+#define GL_HILO8_NV 0x885E
+#define GL_SIGNED_HILO8_NV 0x885F
+#define GL_FORCE_BLUE_TO_ONE_NV 0x8860
+#endif
+
+#ifndef GL_NV_vertex_program1_1
+#endif
+
+#ifndef GL_EXT_shadow_funcs
+#endif
+
+#ifndef GL_EXT_stencil_two_side
+#define GL_STENCIL_TEST_TWO_SIDE_EXT 0x8910
+#define GL_ACTIVE_STENCIL_FACE_EXT 0x8911
+#endif
+
+#ifndef GL_ATI_text_fragment_shader
+#define GL_TEXT_FRAGMENT_SHADER_ATI 0x8200
+#endif
+
+#ifndef GL_APPLE_client_storage
+#define GL_UNPACK_CLIENT_STORAGE_APPLE 0x85B2
+#endif
+
+#ifndef GL_APPLE_element_array
+#define GL_ELEMENT_ARRAY_APPLE 0x8A0C
+#define GL_ELEMENT_ARRAY_TYPE_APPLE 0x8A0D
+#define GL_ELEMENT_ARRAY_POINTER_APPLE 0x8A0E
+#endif
+
+#ifndef GL_APPLE_fence
+#define GL_DRAW_PIXELS_APPLE 0x8A0A
+#define GL_FENCE_APPLE 0x8A0B
+#endif
+
+#ifndef GL_APPLE_vertex_array_object
+#define GL_VERTEX_ARRAY_BINDING_APPLE 0x85B5
+#endif
+
+#ifndef GL_APPLE_vertex_array_range
+#define GL_VERTEX_ARRAY_RANGE_APPLE 0x851D
+#define GL_VERTEX_ARRAY_RANGE_LENGTH_APPLE 0x851E
+#define GL_VERTEX_ARRAY_STORAGE_HINT_APPLE 0x851F
+#define GL_VERTEX_ARRAY_RANGE_POINTER_APPLE 0x8521
+#define GL_STORAGE_CLIENT_APPLE 0x85B4
+#define GL_STORAGE_CACHED_APPLE 0x85BE
+#define GL_STORAGE_SHARED_APPLE 0x85BF
+#endif
+
+#ifndef GL_APPLE_ycbcr_422
+#define GL_YCBCR_422_APPLE 0x85B9
+#define GL_UNSIGNED_SHORT_8_8_APPLE 0x85BA
+#define GL_UNSIGNED_SHORT_8_8_REV_APPLE 0x85BB
+#endif
+
+#ifndef GL_S3_s3tc
+#define GL_RGB_S3TC 0x83A0
+#define GL_RGB4_S3TC 0x83A1
+#define GL_RGBA_S3TC 0x83A2
+#define GL_RGBA4_S3TC 0x83A3
+#endif
+
+#ifndef GL_ATI_draw_buffers
+#define GL_MAX_DRAW_BUFFERS_ATI 0x8824
+#define GL_DRAW_BUFFER0_ATI 0x8825
+#define GL_DRAW_BUFFER1_ATI 0x8826
+#define GL_DRAW_BUFFER2_ATI 0x8827
+#define GL_DRAW_BUFFER3_ATI 0x8828
+#define GL_DRAW_BUFFER4_ATI 0x8829
+#define GL_DRAW_BUFFER5_ATI 0x882A
+#define GL_DRAW_BUFFER6_ATI 0x882B
+#define GL_DRAW_BUFFER7_ATI 0x882C
+#define GL_DRAW_BUFFER8_ATI 0x882D
+#define GL_DRAW_BUFFER9_ATI 0x882E
+#define GL_DRAW_BUFFER10_ATI 0x882F
+#define GL_DRAW_BUFFER11_ATI 0x8830
+#define GL_DRAW_BUFFER12_ATI 0x8831
+#define GL_DRAW_BUFFER13_ATI 0x8832
+#define GL_DRAW_BUFFER14_ATI 0x8833
+#define GL_DRAW_BUFFER15_ATI 0x8834
+#endif
+
+#ifndef GL_ATI_pixel_format_float
+#define GL_TYPE_RGBA_FLOAT_ATI 0x8820
+#define GL_COLOR_CLEAR_UNCLAMPED_VALUE_ATI 0x8835
+#endif
+
+#ifndef GL_ATI_texture_env_combine3
+#define GL_MODULATE_ADD_ATI 0x8744
+#define GL_MODULATE_SIGNED_ADD_ATI 0x8745
+#define GL_MODULATE_SUBTRACT_ATI 0x8746
+#endif
+
+#ifndef GL_ATI_texture_float
+#define GL_RGBA_FLOAT32_ATI 0x8814
+#define GL_RGB_FLOAT32_ATI 0x8815
+#define GL_ALPHA_FLOAT32_ATI 0x8816
+#define GL_INTENSITY_FLOAT32_ATI 0x8817
+#define GL_LUMINANCE_FLOAT32_ATI 0x8818
+#define GL_LUMINANCE_ALPHA_FLOAT32_ATI 0x8819
+#define GL_RGBA_FLOAT16_ATI 0x881A
+#define GL_RGB_FLOAT16_ATI 0x881B
+#define GL_ALPHA_FLOAT16_ATI 0x881C
+#define GL_INTENSITY_FLOAT16_ATI 0x881D
+#define GL_LUMINANCE_FLOAT16_ATI 0x881E
+#define GL_LUMINANCE_ALPHA_FLOAT16_ATI 0x881F
+#endif
+
+#ifndef GL_NV_float_buffer
+#define GL_FLOAT_R_NV 0x8880
+#define GL_FLOAT_RG_NV 0x8881
+#define GL_FLOAT_RGB_NV 0x8882
+#define GL_FLOAT_RGBA_NV 0x8883
+#define GL_FLOAT_R16_NV 0x8884
+#define GL_FLOAT_R32_NV 0x8885
+#define GL_FLOAT_RG16_NV 0x8886
+#define GL_FLOAT_RG32_NV 0x8887
+#define GL_FLOAT_RGB16_NV 0x8888
+#define GL_FLOAT_RGB32_NV 0x8889
+#define GL_FLOAT_RGBA16_NV 0x888A
+#define GL_FLOAT_RGBA32_NV 0x888B
+#define GL_TEXTURE_FLOAT_COMPONENTS_NV 0x888C
+#define GL_FLOAT_CLEAR_COLOR_VALUE_NV 0x888D
+#define GL_FLOAT_RGBA_MODE_NV 0x888E
+#endif
+
+#ifndef GL_NV_fragment_program
+#define GL_MAX_FRAGMENT_PROGRAM_LOCAL_PARAMETERS_NV 0x8868
+#define GL_FRAGMENT_PROGRAM_NV 0x8870
+#define GL_MAX_TEXTURE_COORDS_NV 0x8871
+#define GL_MAX_TEXTURE_IMAGE_UNITS_NV 0x8872
+#define GL_FRAGMENT_PROGRAM_BINDING_NV 0x8873
+#define GL_PROGRAM_ERROR_STRING_NV 0x8874
+#endif
+
+#ifndef GL_NV_half_float
+#define GL_HALF_FLOAT_NV 0x140B
+#endif
+
+#ifndef GL_NV_pixel_data_range
+#define GL_WRITE_PIXEL_DATA_RANGE_NV 0x8878
+#define GL_READ_PIXEL_DATA_RANGE_NV 0x8879
+#define GL_WRITE_PIXEL_DATA_RANGE_LENGTH_NV 0x887A
+#define GL_READ_PIXEL_DATA_RANGE_LENGTH_NV 0x887B
+#define GL_WRITE_PIXEL_DATA_RANGE_POINTER_NV 0x887C
+#define GL_READ_PIXEL_DATA_RANGE_POINTER_NV 0x887D
+#endif
+
+#ifndef GL_NV_primitive_restart
+#define GL_PRIMITIVE_RESTART_NV 0x8558
+#define GL_PRIMITIVE_RESTART_INDEX_NV 0x8559
+#endif
+
+#ifndef GL_NV_texture_expand_normal
+#define GL_TEXTURE_UNSIGNED_REMAP_MODE_NV 0x888F
+#endif
+
+#ifndef GL_NV_vertex_program2
+#endif
+
+#ifndef GL_ATI_map_object_buffer
+#endif
+
+#ifndef GL_ATI_separate_stencil
+#define GL_STENCIL_BACK_FUNC_ATI 0x8800
+#define GL_STENCIL_BACK_FAIL_ATI 0x8801
+#define GL_STENCIL_BACK_PASS_DEPTH_FAIL_ATI 0x8802
+#define GL_STENCIL_BACK_PASS_DEPTH_PASS_ATI 0x8803
+#endif
+
+#ifndef GL_ATI_vertex_attrib_array_object
+#endif
+
+#ifndef GL_OES_read_format
+#define GL_IMPLEMENTATION_COLOR_READ_TYPE_OES 0x8B9A
+#define GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES 0x8B9B
+#endif
+
+#ifndef GL_EXT_depth_bounds_test
+#define GL_DEPTH_BOUNDS_TEST_EXT 0x8890
+#define GL_DEPTH_BOUNDS_EXT 0x8891
+#endif
+
+#ifndef GL_EXT_texture_mirror_clamp
+#define GL_MIRROR_CLAMP_EXT 0x8742
+#define GL_MIRROR_CLAMP_TO_EDGE_EXT 0x8743
+#define GL_MIRROR_CLAMP_TO_BORDER_EXT 0x8912
+#endif
+
+#ifndef GL_EXT_blend_equation_separate
+#define GL_BLEND_EQUATION_RGB_EXT 0x8009
+#define GL_BLEND_EQUATION_ALPHA_EXT 0x883D
+#endif
+
+#ifndef GL_MESA_pack_invert
+#define GL_PACK_INVERT_MESA 0x8758
+#endif
+
+#ifndef GL_MESA_ycbcr_texture
+#define GL_UNSIGNED_SHORT_8_8_MESA 0x85BA
+#define GL_UNSIGNED_SHORT_8_8_REV_MESA 0x85BB
+#define GL_YCBCR_MESA 0x8757
+#endif
+
+#ifndef GL_EXT_pixel_buffer_object
+#define GL_PIXEL_PACK_BUFFER_EXT 0x88EB
+#define GL_PIXEL_UNPACK_BUFFER_EXT 0x88EC
+#define GL_PIXEL_PACK_BUFFER_BINDING_EXT 0x88ED
+#define GL_PIXEL_UNPACK_BUFFER_BINDING_EXT 0x88EF
+#endif
+
+#ifndef GL_NV_fragment_program_option
+#endif
+
+#ifndef GL_NV_fragment_program2
+#define GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV 0x88F4
+#define GL_MAX_PROGRAM_CALL_DEPTH_NV 0x88F5
+#define GL_MAX_PROGRAM_IF_DEPTH_NV 0x88F6
+#define GL_MAX_PROGRAM_LOOP_DEPTH_NV 0x88F7
+#define GL_MAX_PROGRAM_LOOP_COUNT_NV 0x88F8
+#endif
+
+#ifndef GL_NV_vertex_program2_option
+/* reuse GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV */
+/* reuse GL_MAX_PROGRAM_CALL_DEPTH_NV */
+#endif
+
+#ifndef GL_NV_vertex_program3
+/* reuse GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB */
+#endif
+
+#ifndef GL_EXT_framebuffer_object
+#define GL_INVALID_FRAMEBUFFER_OPERATION_EXT 0x0506
+#define GL_MAX_RENDERBUFFER_SIZE_EXT 0x84E8
+#define GL_FRAMEBUFFER_BINDING_EXT 0x8CA6
+#define GL_RENDERBUFFER_BINDING_EXT 0x8CA7
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT 0x8CD0
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT 0x8CD1
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT 0x8CD2
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT 0x8CD3
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT 0x8CD4
+#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
+#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT 0x8CD6
+#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT 0x8CD7
+#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT 0x8CD9
+#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT 0x8CDA
+#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT 0x8CDB
+#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT 0x8CDC
+#define GL_FRAMEBUFFER_UNSUPPORTED_EXT 0x8CDD
+#define GL_MAX_COLOR_ATTACHMENTS_EXT 0x8CDF
+#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
+#define GL_COLOR_ATTACHMENT1_EXT 0x8CE1
+#define GL_COLOR_ATTACHMENT2_EXT 0x8CE2
+#define GL_COLOR_ATTACHMENT3_EXT 0x8CE3
+#define GL_COLOR_ATTACHMENT4_EXT 0x8CE4
+#define GL_COLOR_ATTACHMENT5_EXT 0x8CE5
+#define GL_COLOR_ATTACHMENT6_EXT 0x8CE6
+#define GL_COLOR_ATTACHMENT7_EXT 0x8CE7
+#define GL_COLOR_ATTACHMENT8_EXT 0x8CE8
+#define GL_COLOR_ATTACHMENT9_EXT 0x8CE9
+#define GL_COLOR_ATTACHMENT10_EXT 0x8CEA
+#define GL_COLOR_ATTACHMENT11_EXT 0x8CEB
+#define GL_COLOR_ATTACHMENT12_EXT 0x8CEC
+#define GL_COLOR_ATTACHMENT13_EXT 0x8CED
+#define GL_COLOR_ATTACHMENT14_EXT 0x8CEE
+#define GL_COLOR_ATTACHMENT15_EXT 0x8CEF
+#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
+#define GL_STENCIL_ATTACHMENT_EXT 0x8D20
+#define GL_FRAMEBUFFER_EXT 0x8D40
+#define GL_RENDERBUFFER_EXT 0x8D41
+#define GL_RENDERBUFFER_WIDTH_EXT 0x8D42
+#define GL_RENDERBUFFER_HEIGHT_EXT 0x8D43
+#define GL_RENDERBUFFER_INTERNAL_FORMAT_EXT 0x8D44
+#define GL_STENCIL_INDEX1_EXT 0x8D46
+#define GL_STENCIL_INDEX4_EXT 0x8D47
+#define GL_STENCIL_INDEX8_EXT 0x8D48
+#define GL_STENCIL_INDEX16_EXT 0x8D49
+#define GL_RENDERBUFFER_RED_SIZE_EXT 0x8D50
+#define GL_RENDERBUFFER_GREEN_SIZE_EXT 0x8D51
+#define GL_RENDERBUFFER_BLUE_SIZE_EXT 0x8D52
+#define GL_RENDERBUFFER_ALPHA_SIZE_EXT 0x8D53
+#define GL_RENDERBUFFER_DEPTH_SIZE_EXT 0x8D54
+#define GL_RENDERBUFFER_STENCIL_SIZE_EXT 0x8D55
+#endif
+
+#ifndef GL_GREMEDY_string_marker
+#endif
+
+#ifndef GL_EXT_packed_depth_stencil
+#define GL_DEPTH_STENCIL_EXT 0x84F9
+#define GL_UNSIGNED_INT_24_8_EXT 0x84FA
+#define GL_DEPTH24_STENCIL8_EXT 0x88F0
+#define GL_TEXTURE_STENCIL_SIZE_EXT 0x88F1
+#endif
+
+#ifndef GL_EXT_stencil_clear_tag
+#define GL_STENCIL_TAG_BITS_EXT 0x88F2
+#define GL_STENCIL_CLEAR_TAG_VALUE_EXT 0x88F3
+#endif
+
+#ifndef GL_EXT_texture_sRGB
+#define GL_SRGB_EXT 0x8C40
+#define GL_SRGB8_EXT 0x8C41
+#define GL_SRGB_ALPHA_EXT 0x8C42
+#define GL_SRGB8_ALPHA8_EXT 0x8C43
+#define GL_SLUMINANCE_ALPHA_EXT 0x8C44
+#define GL_SLUMINANCE8_ALPHA8_EXT 0x8C45
+#define GL_SLUMINANCE_EXT 0x8C46
+#define GL_SLUMINANCE8_EXT 0x8C47
+#define GL_COMPRESSED_SRGB_EXT 0x8C48
+#define GL_COMPRESSED_SRGB_ALPHA_EXT 0x8C49
+#define GL_COMPRESSED_SLUMINANCE_EXT 0x8C4A
+#define GL_COMPRESSED_SLUMINANCE_ALPHA_EXT 0x8C4B
+#define GL_COMPRESSED_SRGB_S3TC_DXT1_EXT 0x8C4C
+#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT 0x8C4D
+#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT 0x8C4E
+#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT 0x8C4F
+#endif
+
+#ifndef GL_EXT_framebuffer_blit
+#define GL_READ_FRAMEBUFFER_EXT 0x8CA8
+#define GL_DRAW_FRAMEBUFFER_EXT 0x8CA9
+#define GL_DRAW_FRAMEBUFFER_BINDING_EXT GL_FRAMEBUFFER_BINDING_EXT
+#define GL_READ_FRAMEBUFFER_BINDING_EXT 0x8CAA
+#endif
+
+#ifndef GL_EXT_framebuffer_multisample
+#define GL_RENDERBUFFER_SAMPLES_EXT 0x8CAB
+#define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT 0x8D56
+#define GL_MAX_SAMPLES_EXT 0x8D57
+#endif
+
+#ifndef GL_MESAX_texture_stack
+#define GL_TEXTURE_1D_STACK_MESAX 0x8759
+#define GL_TEXTURE_2D_STACK_MESAX 0x875A
+#define GL_PROXY_TEXTURE_1D_STACK_MESAX 0x875B
+#define GL_PROXY_TEXTURE_2D_STACK_MESAX 0x875C
+#define GL_TEXTURE_1D_STACK_BINDING_MESAX 0x875D
+#define GL_TEXTURE_2D_STACK_BINDING_MESAX 0x875E
+#endif
+
+#ifndef GL_EXT_timer_query
+#define GL_TIME_ELAPSED_EXT 0x88BF
+#endif
+
+#ifndef GL_EXT_gpu_program_parameters
+#endif
+
+#ifndef GL_APPLE_flush_buffer_range
+#define GL_BUFFER_SERIALIZED_MODIFY_APPLE 0x8A12
+#define GL_BUFFER_FLUSHING_UNMAP_APPLE 0x8A13
+#endif
+
+#ifndef GL_NV_gpu_program4
+#define GL_MIN_PROGRAM_TEXEL_OFFSET_NV 0x8904
+#define GL_MAX_PROGRAM_TEXEL_OFFSET_NV 0x8905
+#define GL_PROGRAM_ATTRIB_COMPONENTS_NV 0x8906
+#define GL_PROGRAM_RESULT_COMPONENTS_NV 0x8907
+#define GL_MAX_PROGRAM_ATTRIB_COMPONENTS_NV 0x8908
+#define GL_MAX_PROGRAM_RESULT_COMPONENTS_NV 0x8909
+#define GL_MAX_PROGRAM_GENERIC_ATTRIBS_NV 0x8DA5
+#define GL_MAX_PROGRAM_GENERIC_RESULTS_NV 0x8DA6
+#endif
+
+#ifndef GL_NV_geometry_program4
+#define GL_LINES_ADJACENCY_EXT 0x000A
+#define GL_LINE_STRIP_ADJACENCY_EXT 0x000B
+#define GL_TRIANGLES_ADJACENCY_EXT 0x000C
+#define GL_TRIANGLE_STRIP_ADJACENCY_EXT 0x000D
+#define GL_GEOMETRY_PROGRAM_NV 0x8C26
+#define GL_MAX_PROGRAM_OUTPUT_VERTICES_NV 0x8C27
+#define GL_MAX_PROGRAM_TOTAL_OUTPUT_COMPONENTS_NV 0x8C28
+#define GL_GEOMETRY_VERTICES_OUT_EXT 0x8DDA
+#define GL_GEOMETRY_INPUT_TYPE_EXT 0x8DDB
+#define GL_GEOMETRY_OUTPUT_TYPE_EXT 0x8DDC
+#define GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_EXT 0x8C29
+#define GL_FRAMEBUFFER_ATTACHMENT_LAYERED_EXT 0x8DA7
+#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_EXT 0x8DA8
+#define GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_EXT 0x8DA9
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT 0x8CD4
+#define GL_PROGRAM_POINT_SIZE_EXT 0x8642
+#endif
+
+#ifndef GL_EXT_geometry_shader4
+#define GL_GEOMETRY_SHADER_EXT 0x8DD9
+/* reuse GL_GEOMETRY_VERTICES_OUT_EXT */
+/* reuse GL_GEOMETRY_INPUT_TYPE_EXT */
+/* reuse GL_GEOMETRY_OUTPUT_TYPE_EXT */
+/* reuse GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_EXT */
+#define GL_MAX_GEOMETRY_VARYING_COMPONENTS_EXT 0x8DDD
+#define GL_MAX_VERTEX_VARYING_COMPONENTS_EXT 0x8DDE
+#define GL_MAX_VARYING_COMPONENTS_EXT 0x8B4B
+#define GL_MAX_GEOMETRY_UNIFORM_COMPONENTS_EXT 0x8DDF
+#define GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT 0x8DE0
+#define GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS_EXT 0x8DE1
+/* reuse GL_LINES_ADJACENCY_EXT */
+/* reuse GL_LINE_STRIP_ADJACENCY_EXT */
+/* reuse GL_TRIANGLES_ADJACENCY_EXT */
+/* reuse GL_TRIANGLE_STRIP_ADJACENCY_EXT */
+/* reuse GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS_EXT */
+/* reuse GL_FRAMEBUFFER_INCOMPLETE_LAYER_COUNT_EXT */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_LAYERED_EXT */
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT */
+/* reuse GL_PROGRAM_POINT_SIZE_EXT */
+#endif
+
+#ifndef GL_NV_vertex_program4
+#define GL_VERTEX_ATTRIB_ARRAY_INTEGER_NV 0x88FD
+#endif
+
+#ifndef GL_EXT_gpu_shader4
+#define GL_SAMPLER_1D_ARRAY_EXT 0x8DC0
+#define GL_SAMPLER_2D_ARRAY_EXT 0x8DC1
+#define GL_SAMPLER_BUFFER_EXT 0x8DC2
+#define GL_SAMPLER_1D_ARRAY_SHADOW_EXT 0x8DC3
+#define GL_SAMPLER_2D_ARRAY_SHADOW_EXT 0x8DC4
+#define GL_SAMPLER_CUBE_SHADOW_EXT 0x8DC5
+#define GL_UNSIGNED_INT_VEC2_EXT 0x8DC6
+#define GL_UNSIGNED_INT_VEC3_EXT 0x8DC7
+#define GL_UNSIGNED_INT_VEC4_EXT 0x8DC8
+#define GL_INT_SAMPLER_1D_EXT 0x8DC9
+#define GL_INT_SAMPLER_2D_EXT 0x8DCA
+#define GL_INT_SAMPLER_3D_EXT 0x8DCB
+#define GL_INT_SAMPLER_CUBE_EXT 0x8DCC
+#define GL_INT_SAMPLER_2D_RECT_EXT 0x8DCD
+#define GL_INT_SAMPLER_1D_ARRAY_EXT 0x8DCE
+#define GL_INT_SAMPLER_2D_ARRAY_EXT 0x8DCF
+#define GL_INT_SAMPLER_BUFFER_EXT 0x8DD0
+#define GL_UNSIGNED_INT_SAMPLER_1D_EXT 0x8DD1
+#define GL_UNSIGNED_INT_SAMPLER_2D_EXT 0x8DD2
+#define GL_UNSIGNED_INT_SAMPLER_3D_EXT 0x8DD3
+#define GL_UNSIGNED_INT_SAMPLER_CUBE_EXT 0x8DD4
+#define GL_UNSIGNED_INT_SAMPLER_2D_RECT_EXT 0x8DD5
+#define GL_UNSIGNED_INT_SAMPLER_1D_ARRAY_EXT 0x8DD6
+#define GL_UNSIGNED_INT_SAMPLER_2D_ARRAY_EXT 0x8DD7
+#define GL_UNSIGNED_INT_SAMPLER_BUFFER_EXT 0x8DD8
+#endif
+
+#ifndef GL_EXT_draw_instanced
+#endif
+
+#ifndef GL_EXT_packed_float
+#define GL_R11F_G11F_B10F_EXT 0x8C3A
+#define GL_UNSIGNED_INT_10F_11F_11F_REV_EXT 0x8C3B
+#define GL_RGBA_SIGNED_COMPONENTS_EXT 0x8C3C
+#endif
+
+#ifndef GL_EXT_texture_array
+#define GL_TEXTURE_1D_ARRAY_EXT 0x8C18
+#define GL_PROXY_TEXTURE_1D_ARRAY_EXT 0x8C19
+#define GL_TEXTURE_2D_ARRAY_EXT 0x8C1A
+#define GL_PROXY_TEXTURE_2D_ARRAY_EXT 0x8C1B
+#define GL_TEXTURE_BINDING_1D_ARRAY_EXT 0x8C1C
+#define GL_TEXTURE_BINDING_2D_ARRAY_EXT 0x8C1D
+#define GL_MAX_ARRAY_TEXTURE_LAYERS_EXT 0x88FF
+#define GL_COMPARE_REF_DEPTH_TO_TEXTURE_EXT 0x884E
+/* reuse GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER_EXT */
+#endif
+
+#ifndef GL_EXT_texture_buffer_object
+#define GL_TEXTURE_BUFFER_EXT 0x8C2A
+#define GL_MAX_TEXTURE_BUFFER_SIZE_EXT 0x8C2B
+#define GL_TEXTURE_BINDING_BUFFER_EXT 0x8C2C
+#define GL_TEXTURE_BUFFER_DATA_STORE_BINDING_EXT 0x8C2D
+#define GL_TEXTURE_BUFFER_FORMAT_EXT 0x8C2E
+#endif
+
+#ifndef GL_EXT_texture_compression_latc
+#define GL_COMPRESSED_LUMINANCE_LATC1_EXT 0x8C70
+#define GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT 0x8C71
+#define GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT 0x8C72
+#define GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT 0x8C73
+#endif
+
+#ifndef GL_EXT_texture_compression_rgtc
+#define GL_COMPRESSED_RED_RGTC1_EXT 0x8DBB
+#define GL_COMPRESSED_SIGNED_RED_RGTC1_EXT 0x8DBC
+#define GL_COMPRESSED_RED_GREEN_RGTC2_EXT 0x8DBD
+#define GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT 0x8DBE
+#endif
+
+#ifndef GL_EXT_texture_shared_exponent
+#define GL_RGB9_E5_EXT 0x8C3D
+#define GL_UNSIGNED_INT_5_9_9_9_REV_EXT 0x8C3E
+#define GL_TEXTURE_SHARED_SIZE_EXT 0x8C3F
+#endif
+
+#ifndef GL_NV_depth_buffer_float
+#define GL_DEPTH_COMPONENT32F_NV 0x8DAB
+#define GL_DEPTH32F_STENCIL8_NV 0x8DAC
+#define GL_FLOAT_32_UNSIGNED_INT_24_8_REV_NV 0x8DAD
+#define GL_DEPTH_BUFFER_FLOAT_MODE_NV 0x8DAF
+#endif
+
+#ifndef GL_NV_fragment_program4
+#endif
+
+#ifndef GL_NV_framebuffer_multisample_coverage
+#define GL_RENDERBUFFER_COVERAGE_SAMPLES_NV 0x8CAB
+#define GL_RENDERBUFFER_COLOR_SAMPLES_NV 0x8E10
+#define GL_MAX_MULTISAMPLE_COVERAGE_MODES_NV 0x8E11
+#define GL_MULTISAMPLE_COVERAGE_MODES_NV 0x8E12
+#endif
+
+#ifndef GL_EXT_framebuffer_sRGB
+#define GL_FRAMEBUFFER_SRGB_EXT 0x8DB9
+#define GL_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x8DBA
+#endif
+
+#ifndef GL_NV_geometry_shader4
+#endif
+
+#ifndef GL_NV_parameter_buffer_object
+#define GL_MAX_PROGRAM_PARAMETER_BUFFER_BINDINGS_NV 0x8DA0
+#define GL_MAX_PROGRAM_PARAMETER_BUFFER_SIZE_NV 0x8DA1
+#define GL_VERTEX_PROGRAM_PARAMETER_BUFFER_NV 0x8DA2
+#define GL_GEOMETRY_PROGRAM_PARAMETER_BUFFER_NV 0x8DA3
+#define GL_FRAGMENT_PROGRAM_PARAMETER_BUFFER_NV 0x8DA4
+#endif
+
+#ifndef GL_EXT_draw_buffers2
+#endif
+
+#ifndef GL_NV_transform_feedback
+#define GL_BACK_PRIMARY_COLOR_NV 0x8C77
+#define GL_BACK_SECONDARY_COLOR_NV 0x8C78
+#define GL_TEXTURE_COORD_NV 0x8C79
+#define GL_CLIP_DISTANCE_NV 0x8C7A
+#define GL_VERTEX_ID_NV 0x8C7B
+#define GL_PRIMITIVE_ID_NV 0x8C7C
+#define GL_GENERIC_ATTRIB_NV 0x8C7D
+#define GL_TRANSFORM_FEEDBACK_ATTRIBS_NV 0x8C7E
+#define GL_TRANSFORM_FEEDBACK_BUFFER_MODE_NV 0x8C7F
+#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_NV 0x8C80
+#define GL_ACTIVE_VARYINGS_NV 0x8C81
+#define GL_ACTIVE_VARYING_MAX_LENGTH_NV 0x8C82
+#define GL_TRANSFORM_FEEDBACK_VARYINGS_NV 0x8C83
+#define GL_TRANSFORM_FEEDBACK_BUFFER_START_NV 0x8C84
+#define GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_NV 0x8C85
+#define GL_TRANSFORM_FEEDBACK_RECORD_NV 0x8C86
+#define GL_PRIMITIVES_GENERATED_NV 0x8C87
+#define GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_NV 0x8C88
+#define GL_RASTERIZER_DISCARD_NV 0x8C89
+#define GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_ATTRIBS_NV 0x8C8A
+#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_NV 0x8C8B
+#define GL_INTERLEAVED_ATTRIBS_NV 0x8C8C
+#define GL_SEPARATE_ATTRIBS_NV 0x8C8D
+#define GL_TRANSFORM_FEEDBACK_BUFFER_NV 0x8C8E
+#define GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_NV 0x8C8F
+#define GL_LAYER_NV 0x8DAA
+#define GL_NEXT_BUFFER_NV -2
+#define GL_SKIP_COMPONENTS4_NV -3
+#define GL_SKIP_COMPONENTS3_NV -4
+#define GL_SKIP_COMPONENTS2_NV -5
+#define GL_SKIP_COMPONENTS1_NV -6
+#endif
+
+#ifndef GL_EXT_bindable_uniform
+#define GL_MAX_VERTEX_BINDABLE_UNIFORMS_EXT 0x8DE2
+#define GL_MAX_FRAGMENT_BINDABLE_UNIFORMS_EXT 0x8DE3
+#define GL_MAX_GEOMETRY_BINDABLE_UNIFORMS_EXT 0x8DE4
+#define GL_MAX_BINDABLE_UNIFORM_SIZE_EXT 0x8DED
+#define GL_UNIFORM_BUFFER_EXT 0x8DEE
+#define GL_UNIFORM_BUFFER_BINDING_EXT 0x8DEF
+#endif
+
+#ifndef GL_EXT_texture_integer
+#define GL_RGBA32UI_EXT 0x8D70
+#define GL_RGB32UI_EXT 0x8D71
+#define GL_ALPHA32UI_EXT 0x8D72
+#define GL_INTENSITY32UI_EXT 0x8D73
+#define GL_LUMINANCE32UI_EXT 0x8D74
+#define GL_LUMINANCE_ALPHA32UI_EXT 0x8D75
+#define GL_RGBA16UI_EXT 0x8D76
+#define GL_RGB16UI_EXT 0x8D77
+#define GL_ALPHA16UI_EXT 0x8D78
+#define GL_INTENSITY16UI_EXT 0x8D79
+#define GL_LUMINANCE16UI_EXT 0x8D7A
+#define GL_LUMINANCE_ALPHA16UI_EXT 0x8D7B
+#define GL_RGBA8UI_EXT 0x8D7C
+#define GL_RGB8UI_EXT 0x8D7D
+#define GL_ALPHA8UI_EXT 0x8D7E
+#define GL_INTENSITY8UI_EXT 0x8D7F
+#define GL_LUMINANCE8UI_EXT 0x8D80
+#define GL_LUMINANCE_ALPHA8UI_EXT 0x8D81
+#define GL_RGBA32I_EXT 0x8D82
+#define GL_RGB32I_EXT 0x8D83
+#define GL_ALPHA32I_EXT 0x8D84
+#define GL_INTENSITY32I_EXT 0x8D85
+#define GL_LUMINANCE32I_EXT 0x8D86
+#define GL_LUMINANCE_ALPHA32I_EXT 0x8D87
+#define GL_RGBA16I_EXT 0x8D88
+#define GL_RGB16I_EXT 0x8D89
+#define GL_ALPHA16I_EXT 0x8D8A
+#define GL_INTENSITY16I_EXT 0x8D8B
+#define GL_LUMINANCE16I_EXT 0x8D8C
+#define GL_LUMINANCE_ALPHA16I_EXT 0x8D8D
+#define GL_RGBA8I_EXT 0x8D8E
+#define GL_RGB8I_EXT 0x8D8F
+#define GL_ALPHA8I_EXT 0x8D90
+#define GL_INTENSITY8I_EXT 0x8D91
+#define GL_LUMINANCE8I_EXT 0x8D92
+#define GL_LUMINANCE_ALPHA8I_EXT 0x8D93
+#define GL_RED_INTEGER_EXT 0x8D94
+#define GL_GREEN_INTEGER_EXT 0x8D95
+#define GL_BLUE_INTEGER_EXT 0x8D96
+#define GL_ALPHA_INTEGER_EXT 0x8D97
+#define GL_RGB_INTEGER_EXT 0x8D98
+#define GL_RGBA_INTEGER_EXT 0x8D99
+#define GL_BGR_INTEGER_EXT 0x8D9A
+#define GL_BGRA_INTEGER_EXT 0x8D9B
+#define GL_LUMINANCE_INTEGER_EXT 0x8D9C
+#define GL_LUMINANCE_ALPHA_INTEGER_EXT 0x8D9D
+#define GL_RGBA_INTEGER_MODE_EXT 0x8D9E
+#endif
+
+#ifndef GL_GREMEDY_frame_terminator
+#endif
+
+#ifndef GL_NV_conditional_render
+#define GL_QUERY_WAIT_NV 0x8E13
+#define GL_QUERY_NO_WAIT_NV 0x8E14
+#define GL_QUERY_BY_REGION_WAIT_NV 0x8E15
+#define GL_QUERY_BY_REGION_NO_WAIT_NV 0x8E16
+#endif
+
+#ifndef GL_NV_present_video
+#define GL_FRAME_NV 0x8E26
+#define GL_FIELDS_NV 0x8E27
+#define GL_CURRENT_TIME_NV 0x8E28
+#define GL_NUM_FILL_STREAMS_NV 0x8E29
+#define GL_PRESENT_TIME_NV 0x8E2A
+#define GL_PRESENT_DURATION_NV 0x8E2B
+#endif
+
+#ifndef GL_EXT_transform_feedback
+#define GL_TRANSFORM_FEEDBACK_BUFFER_EXT 0x8C8E
+#define GL_TRANSFORM_FEEDBACK_BUFFER_START_EXT 0x8C84
+#define GL_TRANSFORM_FEEDBACK_BUFFER_SIZE_EXT 0x8C85
+#define GL_TRANSFORM_FEEDBACK_BUFFER_BINDING_EXT 0x8C8F
+#define GL_INTERLEAVED_ATTRIBS_EXT 0x8C8C
+#define GL_SEPARATE_ATTRIBS_EXT 0x8C8D
+#define GL_PRIMITIVES_GENERATED_EXT 0x8C87
+#define GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_EXT 0x8C88
+#define GL_RASTERIZER_DISCARD_EXT 0x8C89
+#define GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS_EXT 0x8C8A
+#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS_EXT 0x8C8B
+#define GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS_EXT 0x8C80
+#define GL_TRANSFORM_FEEDBACK_VARYINGS_EXT 0x8C83
+#define GL_TRANSFORM_FEEDBACK_BUFFER_MODE_EXT 0x8C7F
+#define GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH_EXT 0x8C76
+#endif
+
+#ifndef GL_EXT_direct_state_access
+#define GL_PROGRAM_MATRIX_EXT 0x8E2D
+#define GL_TRANSPOSE_PROGRAM_MATRIX_EXT 0x8E2E
+#define GL_PROGRAM_MATRIX_STACK_DEPTH_EXT 0x8E2F
+#endif
+
+#ifndef GL_EXT_vertex_array_bgra
+/* reuse GL_BGRA */
+#endif
+
+#ifndef GL_EXT_texture_swizzle
+#define GL_TEXTURE_SWIZZLE_R_EXT 0x8E42
+#define GL_TEXTURE_SWIZZLE_G_EXT 0x8E43
+#define GL_TEXTURE_SWIZZLE_B_EXT 0x8E44
+#define GL_TEXTURE_SWIZZLE_A_EXT 0x8E45
+#define GL_TEXTURE_SWIZZLE_RGBA_EXT 0x8E46
+#endif
+
+#ifndef GL_NV_explicit_multisample
+#define GL_SAMPLE_POSITION_NV 0x8E50
+#define GL_SAMPLE_MASK_NV 0x8E51
+#define GL_SAMPLE_MASK_VALUE_NV 0x8E52
+#define GL_TEXTURE_BINDING_RENDERBUFFER_NV 0x8E53
+#define GL_TEXTURE_RENDERBUFFER_DATA_STORE_BINDING_NV 0x8E54
+#define GL_TEXTURE_RENDERBUFFER_NV 0x8E55
+#define GL_SAMPLER_RENDERBUFFER_NV 0x8E56
+#define GL_INT_SAMPLER_RENDERBUFFER_NV 0x8E57
+#define GL_UNSIGNED_INT_SAMPLER_RENDERBUFFER_NV 0x8E58
+#define GL_MAX_SAMPLE_MASK_WORDS_NV 0x8E59
+#endif
+
+#ifndef GL_NV_transform_feedback2
+#define GL_TRANSFORM_FEEDBACK_NV 0x8E22
+#define GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED_NV 0x8E23
+#define GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE_NV 0x8E24
+#define GL_TRANSFORM_FEEDBACK_BINDING_NV 0x8E25
+#endif
+
+#ifndef GL_ATI_meminfo
+#define GL_VBO_FREE_MEMORY_ATI 0x87FB
+#define GL_TEXTURE_FREE_MEMORY_ATI 0x87FC
+#define GL_RENDERBUFFER_FREE_MEMORY_ATI 0x87FD
+#endif
+
+#ifndef GL_AMD_performance_monitor
+#define GL_COUNTER_TYPE_AMD 0x8BC0
+#define GL_COUNTER_RANGE_AMD 0x8BC1
+#define GL_UNSIGNED_INT64_AMD 0x8BC2
+#define GL_PERCENTAGE_AMD 0x8BC3
+#define GL_PERFMON_RESULT_AVAILABLE_AMD 0x8BC4
+#define GL_PERFMON_RESULT_SIZE_AMD 0x8BC5
+#define GL_PERFMON_RESULT_AMD 0x8BC6
+#endif
+
+#ifndef GL_AMD_texture_texture4
+#endif
+
+#ifndef GL_AMD_vertex_shader_tesselator
+#define GL_SAMPLER_BUFFER_AMD 0x9001
+#define GL_INT_SAMPLER_BUFFER_AMD 0x9002
+#define GL_UNSIGNED_INT_SAMPLER_BUFFER_AMD 0x9003
+#define GL_TESSELLATION_MODE_AMD 0x9004
+#define GL_TESSELLATION_FACTOR_AMD 0x9005
+#define GL_DISCRETE_AMD 0x9006
+#define GL_CONTINUOUS_AMD 0x9007
+#endif
+
+#ifndef GL_EXT_provoking_vertex
+#define GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION_EXT 0x8E4C
+#define GL_FIRST_VERTEX_CONVENTION_EXT 0x8E4D
+#define GL_LAST_VERTEX_CONVENTION_EXT 0x8E4E
+#define GL_PROVOKING_VERTEX_EXT 0x8E4F
+#endif
+
+#ifndef GL_EXT_texture_snorm
+#define GL_ALPHA_SNORM 0x9010
+#define GL_LUMINANCE_SNORM 0x9011
+#define GL_LUMINANCE_ALPHA_SNORM 0x9012
+#define GL_INTENSITY_SNORM 0x9013
+#define GL_ALPHA8_SNORM 0x9014
+#define GL_LUMINANCE8_SNORM 0x9015
+#define GL_LUMINANCE8_ALPHA8_SNORM 0x9016
+#define GL_INTENSITY8_SNORM 0x9017
+#define GL_ALPHA16_SNORM 0x9018
+#define GL_LUMINANCE16_SNORM 0x9019
+#define GL_LUMINANCE16_ALPHA16_SNORM 0x901A
+#define GL_INTENSITY16_SNORM 0x901B
+/* reuse GL_RED_SNORM */
+/* reuse GL_RG_SNORM */
+/* reuse GL_RGB_SNORM */
+/* reuse GL_RGBA_SNORM */
+/* reuse GL_R8_SNORM */
+/* reuse GL_RG8_SNORM */
+/* reuse GL_RGB8_SNORM */
+/* reuse GL_RGBA8_SNORM */
+/* reuse GL_R16_SNORM */
+/* reuse GL_RG16_SNORM */
+/* reuse GL_RGB16_SNORM */
+/* reuse GL_RGBA16_SNORM */
+/* reuse GL_SIGNED_NORMALIZED */
+#endif
+
+#ifndef GL_AMD_draw_buffers_blend
+#endif
+
+#ifndef GL_APPLE_texture_range
+#define GL_TEXTURE_RANGE_LENGTH_APPLE 0x85B7
+#define GL_TEXTURE_RANGE_POINTER_APPLE 0x85B8
+#define GL_TEXTURE_STORAGE_HINT_APPLE 0x85BC
+#define GL_STORAGE_PRIVATE_APPLE 0x85BD
+/* reuse GL_STORAGE_CACHED_APPLE */
+/* reuse GL_STORAGE_SHARED_APPLE */
+#endif
+
+#ifndef GL_APPLE_float_pixels
+#define GL_HALF_APPLE 0x140B
+#define GL_RGBA_FLOAT32_APPLE 0x8814
+#define GL_RGB_FLOAT32_APPLE 0x8815
+#define GL_ALPHA_FLOAT32_APPLE 0x8816
+#define GL_INTENSITY_FLOAT32_APPLE 0x8817
+#define GL_LUMINANCE_FLOAT32_APPLE 0x8818
+#define GL_LUMINANCE_ALPHA_FLOAT32_APPLE 0x8819
+#define GL_RGBA_FLOAT16_APPLE 0x881A
+#define GL_RGB_FLOAT16_APPLE 0x881B
+#define GL_ALPHA_FLOAT16_APPLE 0x881C
+#define GL_INTENSITY_FLOAT16_APPLE 0x881D
+#define GL_LUMINANCE_FLOAT16_APPLE 0x881E
+#define GL_LUMINANCE_ALPHA_FLOAT16_APPLE 0x881F
+#define GL_COLOR_FLOAT_APPLE 0x8A0F
+#endif
+
+#ifndef GL_APPLE_vertex_program_evaluators
+#define GL_VERTEX_ATTRIB_MAP1_APPLE 0x8A00
+#define GL_VERTEX_ATTRIB_MAP2_APPLE 0x8A01
+#define GL_VERTEX_ATTRIB_MAP1_SIZE_APPLE 0x8A02
+#define GL_VERTEX_ATTRIB_MAP1_COEFF_APPLE 0x8A03
+#define GL_VERTEX_ATTRIB_MAP1_ORDER_APPLE 0x8A04
+#define GL_VERTEX_ATTRIB_MAP1_DOMAIN_APPLE 0x8A05
+#define GL_VERTEX_ATTRIB_MAP2_SIZE_APPLE 0x8A06
+#define GL_VERTEX_ATTRIB_MAP2_COEFF_APPLE 0x8A07
+#define GL_VERTEX_ATTRIB_MAP2_ORDER_APPLE 0x8A08
+#define GL_VERTEX_ATTRIB_MAP2_DOMAIN_APPLE 0x8A09
+#endif
+
+#ifndef GL_APPLE_aux_depth_stencil
+#define GL_AUX_DEPTH_STENCIL_APPLE 0x8A14
+#endif
+
+#ifndef GL_APPLE_object_purgeable
+#define GL_BUFFER_OBJECT_APPLE 0x85B3
+#define GL_RELEASED_APPLE 0x8A19
+#define GL_VOLATILE_APPLE 0x8A1A
+#define GL_RETAINED_APPLE 0x8A1B
+#define GL_UNDEFINED_APPLE 0x8A1C
+#define GL_PURGEABLE_APPLE 0x8A1D
+#endif
+
+#ifndef GL_APPLE_row_bytes
+#define GL_PACK_ROW_BYTES_APPLE 0x8A15
+#define GL_UNPACK_ROW_BYTES_APPLE 0x8A16
+#endif
+
+#ifndef GL_APPLE_rgb_422
+#define GL_RGB_422_APPLE 0x8A1F
+/* reuse GL_UNSIGNED_SHORT_8_8_APPLE */
+/* reuse GL_UNSIGNED_SHORT_8_8_REV_APPLE */
+#endif
+
+#ifndef GL_NV_video_capture
+#define GL_VIDEO_BUFFER_NV 0x9020
+#define GL_VIDEO_BUFFER_BINDING_NV 0x9021
+#define GL_FIELD_UPPER_NV 0x9022
+#define GL_FIELD_LOWER_NV 0x9023
+#define GL_NUM_VIDEO_CAPTURE_STREAMS_NV 0x9024
+#define GL_NEXT_VIDEO_CAPTURE_BUFFER_STATUS_NV 0x9025
+#define GL_VIDEO_CAPTURE_TO_422_SUPPORTED_NV 0x9026
+#define GL_LAST_VIDEO_CAPTURE_STATUS_NV 0x9027
+#define GL_VIDEO_BUFFER_PITCH_NV 0x9028
+#define GL_VIDEO_COLOR_CONVERSION_MATRIX_NV 0x9029
+#define GL_VIDEO_COLOR_CONVERSION_MAX_NV 0x902A
+#define GL_VIDEO_COLOR_CONVERSION_MIN_NV 0x902B
+#define GL_VIDEO_COLOR_CONVERSION_OFFSET_NV 0x902C
+#define GL_VIDEO_BUFFER_INTERNAL_FORMAT_NV 0x902D
+#define GL_PARTIAL_SUCCESS_NV 0x902E
+#define GL_SUCCESS_NV 0x902F
+#define GL_FAILURE_NV 0x9030
+#define GL_YCBYCR8_422_NV 0x9031
+#define GL_YCBAYCR8A_4224_NV 0x9032
+#define GL_Z6Y10Z6CB10Z6Y10Z6CR10_422_NV 0x9033
+#define GL_Z6Y10Z6CB10Z6A10Z6Y10Z6CR10Z6A10_4224_NV 0x9034
+#define GL_Z4Y12Z4CB12Z4Y12Z4CR12_422_NV 0x9035
+#define GL_Z4Y12Z4CB12Z4A12Z4Y12Z4CR12Z4A12_4224_NV 0x9036
+#define GL_Z4Y12Z4CB12Z4CR12_444_NV 0x9037
+#define GL_VIDEO_CAPTURE_FRAME_WIDTH_NV 0x9038
+#define GL_VIDEO_CAPTURE_FRAME_HEIGHT_NV 0x9039
+#define GL_VIDEO_CAPTURE_FIELD_UPPER_HEIGHT_NV 0x903A
+#define GL_VIDEO_CAPTURE_FIELD_LOWER_HEIGHT_NV 0x903B
+#define GL_VIDEO_CAPTURE_SURFACE_ORIGIN_NV 0x903C
+#endif
+
+#ifndef GL_NV_copy_image
+#endif
+
+#ifndef GL_EXT_separate_shader_objects
+#define GL_ACTIVE_PROGRAM_EXT 0x8B8D
+#endif
+
+#ifndef GL_NV_parameter_buffer_object2
+#endif
+
+#ifndef GL_NV_shader_buffer_load
+#define GL_BUFFER_GPU_ADDRESS_NV 0x8F1D
+#define GL_GPU_ADDRESS_NV 0x8F34
+#define GL_MAX_SHADER_BUFFER_ADDRESS_NV 0x8F35
+#endif
+
+#ifndef GL_NV_vertex_buffer_unified_memory
+#define GL_VERTEX_ATTRIB_ARRAY_UNIFIED_NV 0x8F1E
+#define GL_ELEMENT_ARRAY_UNIFIED_NV 0x8F1F
+#define GL_VERTEX_ATTRIB_ARRAY_ADDRESS_NV 0x8F20
+#define GL_VERTEX_ARRAY_ADDRESS_NV 0x8F21
+#define GL_NORMAL_ARRAY_ADDRESS_NV 0x8F22
+#define GL_COLOR_ARRAY_ADDRESS_NV 0x8F23
+#define GL_INDEX_ARRAY_ADDRESS_NV 0x8F24
+#define GL_TEXTURE_COORD_ARRAY_ADDRESS_NV 0x8F25
+#define GL_EDGE_FLAG_ARRAY_ADDRESS_NV 0x8F26
+#define GL_SECONDARY_COLOR_ARRAY_ADDRESS_NV 0x8F27
+#define GL_FOG_COORD_ARRAY_ADDRESS_NV 0x8F28
+#define GL_ELEMENT_ARRAY_ADDRESS_NV 0x8F29
+#define GL_VERTEX_ATTRIB_ARRAY_LENGTH_NV 0x8F2A
+#define GL_VERTEX_ARRAY_LENGTH_NV 0x8F2B
+#define GL_NORMAL_ARRAY_LENGTH_NV 0x8F2C
+#define GL_COLOR_ARRAY_LENGTH_NV 0x8F2D
+#define GL_INDEX_ARRAY_LENGTH_NV 0x8F2E
+#define GL_TEXTURE_COORD_ARRAY_LENGTH_NV 0x8F2F
+#define GL_EDGE_FLAG_ARRAY_LENGTH_NV 0x8F30
+#define GL_SECONDARY_COLOR_ARRAY_LENGTH_NV 0x8F31
+#define GL_FOG_COORD_ARRAY_LENGTH_NV 0x8F32
+#define GL_ELEMENT_ARRAY_LENGTH_NV 0x8F33
+#define GL_DRAW_INDIRECT_UNIFIED_NV 0x8F40
+#define GL_DRAW_INDIRECT_ADDRESS_NV 0x8F41
+#define GL_DRAW_INDIRECT_LENGTH_NV 0x8F42
+#endif
+
+#ifndef GL_NV_texture_barrier
+#endif
+
+#ifndef GL_AMD_shader_stencil_export
+#endif
+
+#ifndef GL_AMD_seamless_cubemap_per_texture
+/* reuse GL_TEXTURE_CUBE_MAP_SEAMLESS */
+#endif
+
+#ifndef GL_AMD_conservative_depth
+#endif
+
+#ifndef GL_EXT_shader_image_load_store
+#define GL_MAX_IMAGE_UNITS_EXT 0x8F38
+#define GL_MAX_COMBINED_IMAGE_UNITS_AND_FRAGMENT_OUTPUTS_EXT 0x8F39
+#define GL_IMAGE_BINDING_NAME_EXT 0x8F3A
+#define GL_IMAGE_BINDING_LEVEL_EXT 0x8F3B
+#define GL_IMAGE_BINDING_LAYERED_EXT 0x8F3C
+#define GL_IMAGE_BINDING_LAYER_EXT 0x8F3D
+#define GL_IMAGE_BINDING_ACCESS_EXT 0x8F3E
+#define GL_IMAGE_1D_EXT 0x904C
+#define GL_IMAGE_2D_EXT 0x904D
+#define GL_IMAGE_3D_EXT 0x904E
+#define GL_IMAGE_2D_RECT_EXT 0x904F
+#define GL_IMAGE_CUBE_EXT 0x9050
+#define GL_IMAGE_BUFFER_EXT 0x9051
+#define GL_IMAGE_1D_ARRAY_EXT 0x9052
+#define GL_IMAGE_2D_ARRAY_EXT 0x9053
+#define GL_IMAGE_CUBE_MAP_ARRAY_EXT 0x9054
+#define GL_IMAGE_2D_MULTISAMPLE_EXT 0x9055
+#define GL_IMAGE_2D_MULTISAMPLE_ARRAY_EXT 0x9056
+#define GL_INT_IMAGE_1D_EXT 0x9057
+#define GL_INT_IMAGE_2D_EXT 0x9058
+#define GL_INT_IMAGE_3D_EXT 0x9059
+#define GL_INT_IMAGE_2D_RECT_EXT 0x905A
+#define GL_INT_IMAGE_CUBE_EXT 0x905B
+#define GL_INT_IMAGE_BUFFER_EXT 0x905C
+#define GL_INT_IMAGE_1D_ARRAY_EXT 0x905D
+#define GL_INT_IMAGE_2D_ARRAY_EXT 0x905E
+#define GL_INT_IMAGE_CUBE_MAP_ARRAY_EXT 0x905F
+#define GL_INT_IMAGE_2D_MULTISAMPLE_EXT 0x9060
+#define GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY_EXT 0x9061
+#define GL_UNSIGNED_INT_IMAGE_1D_EXT 0x9062
+#define GL_UNSIGNED_INT_IMAGE_2D_EXT 0x9063
+#define GL_UNSIGNED_INT_IMAGE_3D_EXT 0x9064
+#define GL_UNSIGNED_INT_IMAGE_2D_RECT_EXT 0x9065
+#define GL_UNSIGNED_INT_IMAGE_CUBE_EXT 0x9066
+#define GL_UNSIGNED_INT_IMAGE_BUFFER_EXT 0x9067
+#define GL_UNSIGNED_INT_IMAGE_1D_ARRAY_EXT 0x9068
+#define GL_UNSIGNED_INT_IMAGE_2D_ARRAY_EXT 0x9069
+#define GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY_EXT 0x906A
+#define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_EXT 0x906B
+#define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY_EXT 0x906C
+#define GL_MAX_IMAGE_SAMPLES_EXT 0x906D
+#define GL_IMAGE_BINDING_FORMAT_EXT 0x906E
+#define GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT_EXT 0x00000001
+#define GL_ELEMENT_ARRAY_BARRIER_BIT_EXT 0x00000002
+#define GL_UNIFORM_BARRIER_BIT_EXT 0x00000004
+#define GL_TEXTURE_FETCH_BARRIER_BIT_EXT 0x00000008
+#define GL_SHADER_IMAGE_ACCESS_BARRIER_BIT_EXT 0x00000020
+#define GL_COMMAND_BARRIER_BIT_EXT 0x00000040
+#define GL_PIXEL_BUFFER_BARRIER_BIT_EXT 0x00000080
+#define GL_TEXTURE_UPDATE_BARRIER_BIT_EXT 0x00000100
+#define GL_BUFFER_UPDATE_BARRIER_BIT_EXT 0x00000200
+#define GL_FRAMEBUFFER_BARRIER_BIT_EXT 0x00000400
+#define GL_TRANSFORM_FEEDBACK_BARRIER_BIT_EXT 0x00000800
+#define GL_ATOMIC_COUNTER_BARRIER_BIT_EXT 0x00001000
+#define GL_ALL_BARRIER_BITS_EXT 0xFFFFFFFF
+#endif
+
+#ifndef GL_EXT_vertex_attrib_64bit
+/* reuse GL_DOUBLE */
+#define GL_DOUBLE_VEC2_EXT 0x8FFC
+#define GL_DOUBLE_VEC3_EXT 0x8FFD
+#define GL_DOUBLE_VEC4_EXT 0x8FFE
+#define GL_DOUBLE_MAT2_EXT 0x8F46
+#define GL_DOUBLE_MAT3_EXT 0x8F47
+#define GL_DOUBLE_MAT4_EXT 0x8F48
+#define GL_DOUBLE_MAT2x3_EXT 0x8F49
+#define GL_DOUBLE_MAT2x4_EXT 0x8F4A
+#define GL_DOUBLE_MAT3x2_EXT 0x8F4B
+#define GL_DOUBLE_MAT3x4_EXT 0x8F4C
+#define GL_DOUBLE_MAT4x2_EXT 0x8F4D
+#define GL_DOUBLE_MAT4x3_EXT 0x8F4E
+#endif
+
+#ifndef GL_NV_gpu_program5
+#define GL_MAX_GEOMETRY_PROGRAM_INVOCATIONS_NV 0x8E5A
+#define GL_MIN_FRAGMENT_INTERPOLATION_OFFSET_NV 0x8E5B
+#define GL_MAX_FRAGMENT_INTERPOLATION_OFFSET_NV 0x8E5C
+#define GL_FRAGMENT_PROGRAM_INTERPOLATION_OFFSET_BITS_NV 0x8E5D
+#define GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET_NV 0x8E5E
+#define GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET_NV 0x8E5F
+#define GL_MAX_PROGRAM_SUBROUTINE_PARAMETERS_NV 0x8F44
+#define GL_MAX_PROGRAM_SUBROUTINE_NUM_NV 0x8F45
+#endif
+
+#ifndef GL_NV_gpu_shader5
+#define GL_INT64_NV 0x140E
+#define GL_UNSIGNED_INT64_NV 0x140F
+#define GL_INT8_NV 0x8FE0
+#define GL_INT8_VEC2_NV 0x8FE1
+#define GL_INT8_VEC3_NV 0x8FE2
+#define GL_INT8_VEC4_NV 0x8FE3
+#define GL_INT16_NV 0x8FE4
+#define GL_INT16_VEC2_NV 0x8FE5
+#define GL_INT16_VEC3_NV 0x8FE6
+#define GL_INT16_VEC4_NV 0x8FE7
+#define GL_INT64_VEC2_NV 0x8FE9
+#define GL_INT64_VEC3_NV 0x8FEA
+#define GL_INT64_VEC4_NV 0x8FEB
+#define GL_UNSIGNED_INT8_NV 0x8FEC
+#define GL_UNSIGNED_INT8_VEC2_NV 0x8FED
+#define GL_UNSIGNED_INT8_VEC3_NV 0x8FEE
+#define GL_UNSIGNED_INT8_VEC4_NV 0x8FEF
+#define GL_UNSIGNED_INT16_NV 0x8FF0
+#define GL_UNSIGNED_INT16_VEC2_NV 0x8FF1
+#define GL_UNSIGNED_INT16_VEC3_NV 0x8FF2
+#define GL_UNSIGNED_INT16_VEC4_NV 0x8FF3
+#define GL_UNSIGNED_INT64_VEC2_NV 0x8FF5
+#define GL_UNSIGNED_INT64_VEC3_NV 0x8FF6
+#define GL_UNSIGNED_INT64_VEC4_NV 0x8FF7
+#define GL_FLOAT16_NV 0x8FF8
+#define GL_FLOAT16_VEC2_NV 0x8FF9
+#define GL_FLOAT16_VEC3_NV 0x8FFA
+#define GL_FLOAT16_VEC4_NV 0x8FFB
+/* reuse GL_PATCHES */
+#endif
+
+#ifndef GL_NV_shader_buffer_store
+#define GL_SHADER_GLOBAL_ACCESS_BARRIER_BIT_NV 0x00000010
+/* reuse GL_READ_WRITE */
+/* reuse GL_WRITE_ONLY */
+#endif
+
+#ifndef GL_NV_tessellation_program5
+#define GL_MAX_PROGRAM_PATCH_ATTRIBS_NV 0x86D8
+#define GL_TESS_CONTROL_PROGRAM_NV 0x891E
+#define GL_TESS_EVALUATION_PROGRAM_NV 0x891F
+#define GL_TESS_CONTROL_PROGRAM_PARAMETER_BUFFER_NV 0x8C74
+#define GL_TESS_EVALUATION_PROGRAM_PARAMETER_BUFFER_NV 0x8C75
+#endif
+
+#ifndef GL_NV_vertex_attrib_integer_64bit
+/* reuse GL_INT64_NV */
+/* reuse GL_UNSIGNED_INT64_NV */
+#endif
+
+#ifndef GL_NV_multisample_coverage
+#define GL_COVERAGE_SAMPLES_NV 0x80A9
+#define GL_COLOR_SAMPLES_NV 0x8E20
+#endif
+
+#ifndef GL_AMD_name_gen_delete
+#define GL_DATA_BUFFER_AMD 0x9151
+#define GL_PERFORMANCE_MONITOR_AMD 0x9152
+#define GL_QUERY_OBJECT_AMD 0x9153
+#define GL_VERTEX_ARRAY_OBJECT_AMD 0x9154
+#define GL_SAMPLER_OBJECT_AMD 0x9155
+#endif
+
+#ifndef GL_AMD_debug_output
+#define GL_MAX_DEBUG_LOGGED_MESSAGES_AMD 0x9144
+#define GL_DEBUG_LOGGED_MESSAGES_AMD 0x9145
+#define GL_DEBUG_SEVERITY_HIGH_AMD 0x9146
+#define GL_DEBUG_SEVERITY_MEDIUM_AMD 0x9147
+#define GL_DEBUG_SEVERITY_LOW_AMD 0x9148
+#define GL_DEBUG_CATEGORY_API_ERROR_AMD 0x9149
+#define GL_DEBUG_CATEGORY_WINDOW_SYSTEM_AMD 0x914A
+#define GL_DEBUG_CATEGORY_DEPRECATION_AMD 0x914B
+#define GL_DEBUG_CATEGORY_UNDEFINED_BEHAVIOR_AMD 0x914C
+#define GL_DEBUG_CATEGORY_PERFORMANCE_AMD 0x914D
+#define GL_DEBUG_CATEGORY_SHADER_COMPILER_AMD 0x914E
+#define GL_DEBUG_CATEGORY_APPLICATION_AMD 0x914F
+#define GL_DEBUG_CATEGORY_OTHER_AMD 0x9150
+#endif
+
+#ifndef GL_NV_vdpau_interop
+#define GL_SURFACE_STATE_NV 0x86EB
+#define GL_SURFACE_REGISTERED_NV 0x86FD
+#define GL_SURFACE_MAPPED_NV 0x8700
+#define GL_WRITE_DISCARD_NV 0x88BE
+#endif
+
+#ifndef GL_AMD_transform_feedback3_lines_triangles
+#endif
+
+#ifndef GL_AMD_depth_clamp_separate
+#define GL_DEPTH_CLAMP_NEAR_AMD 0x901E
+#define GL_DEPTH_CLAMP_FAR_AMD 0x901F
+#endif
+
+
+/*************************************************************/
+
+#include <stddef.h>
+#ifndef GL_VERSION_2_0
+/* GL type for program/shader text */
+typedef char GLchar;
+#endif
+
+#ifndef GL_VERSION_1_5
+/* GL types for handling large vertex buffer objects */
+typedef ptrdiff_t GLintptr;
+typedef ptrdiff_t GLsizeiptr;
+#endif
+
+#ifndef GL_ARB_vertex_buffer_object
+/* GL types for handling large vertex buffer objects */
+typedef ptrdiff_t GLintptrARB;
+typedef ptrdiff_t GLsizeiptrARB;
+#endif
+
+#ifndef GL_ARB_shader_objects
+/* GL types for program/shader text and shader object handles */
+typedef char GLcharARB;
+typedef unsigned int GLhandleARB;
+#endif
+
+/* GL type for "half" precision (s10e5) float data in host memory */
+#ifndef GL_ARB_half_float_pixel
+typedef unsigned short GLhalfARB;
+#endif
+
+#ifndef GL_NV_half_float
+typedef unsigned short GLhalfNV;
+#endif
+
+#ifndef GLEXT_64_TYPES_DEFINED
+/* This code block is duplicated in glxext.h, so must be protected */
+#define GLEXT_64_TYPES_DEFINED
+/* Define int32_t, int64_t, and uint64_t types for UST/MSC */
+/* (as used in the GL_EXT_timer_query extension). */
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+#include <inttypes.h>
+#elif defined(__sun__) || defined(__digital__)
+#include <inttypes.h>
+#if defined(__STDC__)
+#if defined(__arch64__) || defined(_LP64)
+typedef long int int64_t;
+typedef unsigned long int uint64_t;
+#else
+typedef long long int int64_t;
+typedef unsigned long long int uint64_t;
+#endif /* __arch64__ */
+#endif /* __STDC__ */
+#elif defined( __VMS ) || defined(__sgi)
+#include <inttypes.h>
+#elif defined(__SCO__) || defined(__USLC__)
+#include <stdint.h>
+#elif defined(__UNIXOS2__) || defined(__SOL64__)
+typedef long int int32_t;
+typedef long long int int64_t;
+typedef unsigned long long int uint64_t;
+#elif defined(_WIN32) && defined(__GNUC__)
+#include <stdint.h>
+#elif defined(_WIN32)
+typedef __int32 int32_t;
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+#else
+/* Fallback if nothing above works */
+#include <inttypes.h>
+#endif
+#endif
+
+#ifndef GL_EXT_timer_query
+typedef int64_t GLint64EXT;
+typedef uint64_t GLuint64EXT;
+#endif
+
+#ifndef GL_ARB_sync
+typedef int64_t GLint64;
+typedef uint64_t GLuint64;
+typedef struct __GLsync *GLsync;
+#endif
+
+#ifndef GL_ARB_cl_event
+/* These incomplete types let us declare types compatible with OpenCL's cl_context and cl_event */
+struct _cl_context;
+struct _cl_event;
+#endif
+
+#ifndef GL_ARB_debug_output
+typedef void (APIENTRY *GLDEBUGPROCARB)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,GLvoid *userParam);
+#endif
+
+#ifndef GL_AMD_debug_output
+typedef void (APIENTRY *GLDEBUGPROCAMD)(GLuint id,GLenum category,GLenum severity,GLsizei length,const GLchar *message,GLvoid *userParam);
+#endif
+
+#ifndef GL_NV_vdpau_interop
+typedef GLintptr GLvdpauSurfaceNV;
+#endif
+
+#ifndef GL_VERSION_1_2
+#define GL_VERSION_1_2 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendColor (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
+GLAPI void APIENTRY glBlendEquation (GLenum mode);
+GLAPI void APIENTRY glDrawRangeElements (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
+GLAPI void APIENTRY glTexImage3D (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glTexSubImage3D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glCopyTexSubImage3D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDCOLORPROC) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
+typedef void (APIENTRYP PFNGLBLENDEQUATIONPROC) (GLenum mode);
+typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTSPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
+typedef void (APIENTRYP PFNGLTEXIMAGE3DPROC) (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLTEXSUBIMAGE3DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE3DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+#endif
+
+#ifndef GL_VERSION_1_2_DEPRECATED
+#define GL_VERSION_1_2_DEPRECATED 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glColorTable (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
+GLAPI void APIENTRY glColorTableParameterfv (GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glColorTableParameteriv (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glCopyColorTable (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
+GLAPI void APIENTRY glGetColorTable (GLenum target, GLenum format, GLenum type, GLvoid *table);
+GLAPI void APIENTRY glGetColorTableParameterfv (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetColorTableParameteriv (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glColorSubTable (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
+GLAPI void APIENTRY glCopyColorSubTable (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
+GLAPI void APIENTRY glConvolutionFilter1D (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
+GLAPI void APIENTRY glConvolutionFilter2D (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
+GLAPI void APIENTRY glConvolutionParameterf (GLenum target, GLenum pname, GLfloat params);
+GLAPI void APIENTRY glConvolutionParameterfv (GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glConvolutionParameteri (GLenum target, GLenum pname, GLint params);
+GLAPI void APIENTRY glConvolutionParameteriv (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glCopyConvolutionFilter1D (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
+GLAPI void APIENTRY glCopyConvolutionFilter2D (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glGetConvolutionFilter (GLenum target, GLenum format, GLenum type, GLvoid *image);
+GLAPI void APIENTRY glGetConvolutionParameterfv (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetConvolutionParameteriv (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetSeparableFilter (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
+GLAPI void APIENTRY glSeparableFilter2D (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
+GLAPI void APIENTRY glGetHistogram (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
+GLAPI void APIENTRY glGetHistogramParameterfv (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetHistogramParameteriv (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetMinmax (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
+GLAPI void APIENTRY glGetMinmaxParameterfv (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetMinmaxParameteriv (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glHistogram (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
+GLAPI void APIENTRY glMinmax (GLenum target, GLenum internalformat, GLboolean sink);
+GLAPI void APIENTRY glResetHistogram (GLenum target);
+GLAPI void APIENTRY glResetMinmax (GLenum target);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOLORTABLEPROC) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
+typedef void (APIENTRYP PFNGLCOLORTABLEPARAMETERFVPROC) (GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLCOLORTABLEPARAMETERIVPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLCOPYCOLORTABLEPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
+typedef void (APIENTRYP PFNGLGETCOLORTABLEPROC) (GLenum target, GLenum format, GLenum type, GLvoid *table);
+typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERFVPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLCOLORSUBTABLEPROC) (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOPYCOLORSUBTABLEPROC) (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
+typedef void (APIENTRYP PFNGLCONVOLUTIONFILTER1DPROC) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
+typedef void (APIENTRYP PFNGLCONVOLUTIONFILTER2DPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
+typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERFPROC) (GLenum target, GLenum pname, GLfloat params);
+typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERFVPROC) (GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERIPROC) (GLenum target, GLenum pname, GLint params);
+typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERIVPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLCOPYCONVOLUTIONFILTER1DPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
+typedef void (APIENTRYP PFNGLCOPYCONVOLUTIONFILTER2DPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLGETCONVOLUTIONFILTERPROC) (GLenum target, GLenum format, GLenum type, GLvoid *image);
+typedef void (APIENTRYP PFNGLGETCONVOLUTIONPARAMETERFVPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETCONVOLUTIONPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETSEPARABLEFILTERPROC) (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
+typedef void (APIENTRYP PFNGLSEPARABLEFILTER2DPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
+typedef void (APIENTRYP PFNGLGETHISTOGRAMPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
+typedef void (APIENTRYP PFNGLGETHISTOGRAMPARAMETERFVPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETHISTOGRAMPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETMINMAXPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
+typedef void (APIENTRYP PFNGLGETMINMAXPARAMETERFVPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETMINMAXPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLHISTOGRAMPROC) (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
+typedef void (APIENTRYP PFNGLMINMAXPROC) (GLenum target, GLenum internalformat, GLboolean sink);
+typedef void (APIENTRYP PFNGLRESETHISTOGRAMPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLRESETMINMAXPROC) (GLenum target);
+#endif
+
+#ifndef GL_VERSION_1_3
+#define GL_VERSION_1_3 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glActiveTexture (GLenum texture);
+GLAPI void APIENTRY glSampleCoverage (GLclampf value, GLboolean invert);
+GLAPI void APIENTRY glCompressedTexImage3D (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexImage2D (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexImage1D (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexSubImage3D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexSubImage2D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexSubImage1D (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glGetCompressedTexImage (GLenum target, GLint level, GLvoid *img);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLACTIVETEXTUREPROC) (GLenum texture);
+typedef void (APIENTRYP PFNGLSAMPLECOVERAGEPROC) (GLclampf value, GLboolean invert);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE3DPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE2DPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE1DPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE1DPROC) (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXIMAGEPROC) (GLenum target, GLint level, GLvoid *img);
+#endif
+
+#ifndef GL_VERSION_1_3_DEPRECATED
+#define GL_VERSION_1_3_DEPRECATED 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glClientActiveTexture (GLenum texture);
+GLAPI void APIENTRY glMultiTexCoord1d (GLenum target, GLdouble s);
+GLAPI void APIENTRY glMultiTexCoord1dv (GLenum target, const GLdouble *v);
+GLAPI void APIENTRY glMultiTexCoord1f (GLenum target, GLfloat s);
+GLAPI void APIENTRY glMultiTexCoord1fv (GLenum target, const GLfloat *v);
+GLAPI void APIENTRY glMultiTexCoord1i (GLenum target, GLint s);
+GLAPI void APIENTRY glMultiTexCoord1iv (GLenum target, const GLint *v);
+GLAPI void APIENTRY glMultiTexCoord1s (GLenum target, GLshort s);
+GLAPI void APIENTRY glMultiTexCoord1sv (GLenum target, const GLshort *v);
+GLAPI void APIENTRY glMultiTexCoord2d (GLenum target, GLdouble s, GLdouble t);
+GLAPI void APIENTRY glMultiTexCoord2dv (GLenum target, const GLdouble *v);
+GLAPI void APIENTRY glMultiTexCoord2f (GLenum target, GLfloat s, GLfloat t);
+GLAPI void APIENTRY glMultiTexCoord2fv (GLenum target, const GLfloat *v);
+GLAPI void APIENTRY glMultiTexCoord2i (GLenum target, GLint s, GLint t);
+GLAPI void APIENTRY glMultiTexCoord2iv (GLenum target, const GLint *v);
+GLAPI void APIENTRY glMultiTexCoord2s (GLenum target, GLshort s, GLshort t);
+GLAPI void APIENTRY glMultiTexCoord2sv (GLenum target, const GLshort *v);
+GLAPI void APIENTRY glMultiTexCoord3d (GLenum target, GLdouble s, GLdouble t, GLdouble r);
+GLAPI void APIENTRY glMultiTexCoord3dv (GLenum target, const GLdouble *v);
+GLAPI void APIENTRY glMultiTexCoord3f (GLenum target, GLfloat s, GLfloat t, GLfloat r);
+GLAPI void APIENTRY glMultiTexCoord3fv (GLenum target, const GLfloat *v);
+GLAPI void APIENTRY glMultiTexCoord3i (GLenum target, GLint s, GLint t, GLint r);
+GLAPI void APIENTRY glMultiTexCoord3iv (GLenum target, const GLint *v);
+GLAPI void APIENTRY glMultiTexCoord3s (GLenum target, GLshort s, GLshort t, GLshort r);
+GLAPI void APIENTRY glMultiTexCoord3sv (GLenum target, const GLshort *v);
+GLAPI void APIENTRY glMultiTexCoord4d (GLenum target, GLdouble s, GLdouble t, GLdouble r, GLdouble q);
+GLAPI void APIENTRY glMultiTexCoord4dv (GLenum target, const GLdouble *v);
+GLAPI void APIENTRY glMultiTexCoord4f (GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
+GLAPI void APIENTRY glMultiTexCoord4fv (GLenum target, const GLfloat *v);
+GLAPI void APIENTRY glMultiTexCoord4i (GLenum target, GLint s, GLint t, GLint r, GLint q);
+GLAPI void APIENTRY glMultiTexCoord4iv (GLenum target, const GLint *v);
+GLAPI void APIENTRY glMultiTexCoord4s (GLenum target, GLshort s, GLshort t, GLshort r, GLshort q);
+GLAPI void APIENTRY glMultiTexCoord4sv (GLenum target, const GLshort *v);
+GLAPI void APIENTRY glLoadTransposeMatrixf (const GLfloat *m);
+GLAPI void APIENTRY glLoadTransposeMatrixd (const GLdouble *m);
+GLAPI void APIENTRY glMultTransposeMatrixf (const GLfloat *m);
+GLAPI void APIENTRY glMultTransposeMatrixd (const GLdouble *m);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCLIENTACTIVETEXTUREPROC) (GLenum texture);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1DPROC) (GLenum target, GLdouble s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1DVPROC) (GLenum target, const GLdouble *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1FPROC) (GLenum target, GLfloat s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1FVPROC) (GLenum target, const GLfloat *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1IPROC) (GLenum target, GLint s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1IVPROC) (GLenum target, const GLint *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1SPROC) (GLenum target, GLshort s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1SVPROC) (GLenum target, const GLshort *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2DPROC) (GLenum target, GLdouble s, GLdouble t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2DVPROC) (GLenum target, const GLdouble *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2FPROC) (GLenum target, GLfloat s, GLfloat t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2FVPROC) (GLenum target, const GLfloat *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2IPROC) (GLenum target, GLint s, GLint t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2IVPROC) (GLenum target, const GLint *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2SPROC) (GLenum target, GLshort s, GLshort t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2SVPROC) (GLenum target, const GLshort *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3DPROC) (GLenum target, GLdouble s, GLdouble t, GLdouble r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3DVPROC) (GLenum target, const GLdouble *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3FPROC) (GLenum target, GLfloat s, GLfloat t, GLfloat r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3FVPROC) (GLenum target, const GLfloat *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3IPROC) (GLenum target, GLint s, GLint t, GLint r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3IVPROC) (GLenum target, const GLint *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3SPROC) (GLenum target, GLshort s, GLshort t, GLshort r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3SVPROC) (GLenum target, const GLshort *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4DPROC) (GLenum target, GLdouble s, GLdouble t, GLdouble r, GLdouble q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4DVPROC) (GLenum target, const GLdouble *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4FPROC) (GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4FVPROC) (GLenum target, const GLfloat *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4IPROC) (GLenum target, GLint s, GLint t, GLint r, GLint q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4IVPROC) (GLenum target, const GLint *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4SPROC) (GLenum target, GLshort s, GLshort t, GLshort r, GLshort q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4SVPROC) (GLenum target, const GLshort *v);
+typedef void (APIENTRYP PFNGLLOADTRANSPOSEMATRIXFPROC) (const GLfloat *m);
+typedef void (APIENTRYP PFNGLLOADTRANSPOSEMATRIXDPROC) (const GLdouble *m);
+typedef void (APIENTRYP PFNGLMULTTRANSPOSEMATRIXFPROC) (const GLfloat *m);
+typedef void (APIENTRYP PFNGLMULTTRANSPOSEMATRIXDPROC) (const GLdouble *m);
+#endif
+
+#ifndef GL_VERSION_1_4
+#define GL_VERSION_1_4 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendFuncSeparate (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
+GLAPI void APIENTRY glMultiDrawArrays (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
+GLAPI void APIENTRY glMultiDrawElements (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount);
+GLAPI void APIENTRY glPointParameterf (GLenum pname, GLfloat param);
+GLAPI void APIENTRY glPointParameterfv (GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glPointParameteri (GLenum pname, GLint param);
+GLAPI void APIENTRY glPointParameteriv (GLenum pname, const GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEPROC) (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
+typedef void (APIENTRYP PFNGLMULTIDRAWARRAYSPROC) (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
+typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSPROC) (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount);
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFPROC) (GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFVPROC) (GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLPOINTPARAMETERIPROC) (GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLPOINTPARAMETERIVPROC) (GLenum pname, const GLint *params);
+#endif
+
+#ifndef GL_VERSION_1_4_DEPRECATED
+#define GL_VERSION_1_4_DEPRECATED 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFogCoordf (GLfloat coord);
+GLAPI void APIENTRY glFogCoordfv (const GLfloat *coord);
+GLAPI void APIENTRY glFogCoordd (GLdouble coord);
+GLAPI void APIENTRY glFogCoorddv (const GLdouble *coord);
+GLAPI void APIENTRY glFogCoordPointer (GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glSecondaryColor3b (GLbyte red, GLbyte green, GLbyte blue);
+GLAPI void APIENTRY glSecondaryColor3bv (const GLbyte *v);
+GLAPI void APIENTRY glSecondaryColor3d (GLdouble red, GLdouble green, GLdouble blue);
+GLAPI void APIENTRY glSecondaryColor3dv (const GLdouble *v);
+GLAPI void APIENTRY glSecondaryColor3f (GLfloat red, GLfloat green, GLfloat blue);
+GLAPI void APIENTRY glSecondaryColor3fv (const GLfloat *v);
+GLAPI void APIENTRY glSecondaryColor3i (GLint red, GLint green, GLint blue);
+GLAPI void APIENTRY glSecondaryColor3iv (const GLint *v);
+GLAPI void APIENTRY glSecondaryColor3s (GLshort red, GLshort green, GLshort blue);
+GLAPI void APIENTRY glSecondaryColor3sv (const GLshort *v);
+GLAPI void APIENTRY glSecondaryColor3ub (GLubyte red, GLubyte green, GLubyte blue);
+GLAPI void APIENTRY glSecondaryColor3ubv (const GLubyte *v);
+GLAPI void APIENTRY glSecondaryColor3ui (GLuint red, GLuint green, GLuint blue);
+GLAPI void APIENTRY glSecondaryColor3uiv (const GLuint *v);
+GLAPI void APIENTRY glSecondaryColor3us (GLushort red, GLushort green, GLushort blue);
+GLAPI void APIENTRY glSecondaryColor3usv (const GLushort *v);
+GLAPI void APIENTRY glSecondaryColorPointer (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glWindowPos2d (GLdouble x, GLdouble y);
+GLAPI void APIENTRY glWindowPos2dv (const GLdouble *v);
+GLAPI void APIENTRY glWindowPos2f (GLfloat x, GLfloat y);
+GLAPI void APIENTRY glWindowPos2fv (const GLfloat *v);
+GLAPI void APIENTRY glWindowPos2i (GLint x, GLint y);
+GLAPI void APIENTRY glWindowPos2iv (const GLint *v);
+GLAPI void APIENTRY glWindowPos2s (GLshort x, GLshort y);
+GLAPI void APIENTRY glWindowPos2sv (const GLshort *v);
+GLAPI void APIENTRY glWindowPos3d (GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glWindowPos3dv (const GLdouble *v);
+GLAPI void APIENTRY glWindowPos3f (GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glWindowPos3fv (const GLfloat *v);
+GLAPI void APIENTRY glWindowPos3i (GLint x, GLint y, GLint z);
+GLAPI void APIENTRY glWindowPos3iv (const GLint *v);
+GLAPI void APIENTRY glWindowPos3s (GLshort x, GLshort y, GLshort z);
+GLAPI void APIENTRY glWindowPos3sv (const GLshort *v);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFOGCOORDFPROC) (GLfloat coord);
+typedef void (APIENTRYP PFNGLFOGCOORDFVPROC) (const GLfloat *coord);
+typedef void (APIENTRYP PFNGLFOGCOORDDPROC) (GLdouble coord);
+typedef void (APIENTRYP PFNGLFOGCOORDDVPROC) (const GLdouble *coord);
+typedef void (APIENTRYP PFNGLFOGCOORDPOINTERPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3BPROC) (GLbyte red, GLbyte green, GLbyte blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3BVPROC) (const GLbyte *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3DPROC) (GLdouble red, GLdouble green, GLdouble blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3DVPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3FPROC) (GLfloat red, GLfloat green, GLfloat blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3FVPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3IPROC) (GLint red, GLint green, GLint blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3IVPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3SPROC) (GLshort red, GLshort green, GLshort blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3SVPROC) (const GLshort *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UBPROC) (GLubyte red, GLubyte green, GLubyte blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UBVPROC) (const GLubyte *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UIPROC) (GLuint red, GLuint green, GLuint blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UIVPROC) (const GLuint *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3USPROC) (GLushort red, GLushort green, GLushort blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3USVPROC) (const GLushort *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLORPOINTERPROC) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLWINDOWPOS2DPROC) (GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2DVPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2FPROC) (GLfloat x, GLfloat y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2FVPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2IPROC) (GLint x, GLint y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2IVPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2SPROC) (GLshort x, GLshort y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2SVPROC) (const GLshort *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3DPROC) (GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3DVPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3FPROC) (GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3FVPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3IPROC) (GLint x, GLint y, GLint z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3IVPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3SPROC) (GLshort x, GLshort y, GLshort z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3SVPROC) (const GLshort *v);
+#endif
+
+#ifndef GL_VERSION_1_5
+#define GL_VERSION_1_5 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGenQueries (GLsizei n, GLuint *ids);
+GLAPI void APIENTRY glDeleteQueries (GLsizei n, const GLuint *ids);
+GLAPI GLboolean APIENTRY glIsQuery (GLuint id);
+GLAPI void APIENTRY glBeginQuery (GLenum target, GLuint id);
+GLAPI void APIENTRY glEndQuery (GLenum target);
+GLAPI void APIENTRY glGetQueryiv (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetQueryObjectiv (GLuint id, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetQueryObjectuiv (GLuint id, GLenum pname, GLuint *params);
+GLAPI void APIENTRY glBindBuffer (GLenum target, GLuint buffer);
+GLAPI void APIENTRY glDeleteBuffers (GLsizei n, const GLuint *buffers);
+GLAPI void APIENTRY glGenBuffers (GLsizei n, GLuint *buffers);
+GLAPI GLboolean APIENTRY glIsBuffer (GLuint buffer);
+GLAPI void APIENTRY glBufferData (GLenum target, GLsizeiptr size, const GLvoid *data, GLenum usage);
+GLAPI void APIENTRY glBufferSubData (GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid *data);
+GLAPI void APIENTRY glGetBufferSubData (GLenum target, GLintptr offset, GLsizeiptr size, GLvoid *data);
+GLAPI GLvoid* APIENTRY glMapBuffer (GLenum target, GLenum access);
+GLAPI GLboolean APIENTRY glUnmapBuffer (GLenum target);
+GLAPI void APIENTRY glGetBufferParameteriv (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetBufferPointerv (GLenum target, GLenum pname, GLvoid* *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGENQUERIESPROC) (GLsizei n, GLuint *ids);
+typedef void (APIENTRYP PFNGLDELETEQUERIESPROC) (GLsizei n, const GLuint *ids);
+typedef GLboolean (APIENTRYP PFNGLISQUERYPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLBEGINQUERYPROC) (GLenum target, GLuint id);
+typedef void (APIENTRYP PFNGLENDQUERYPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLGETQUERYIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTIVPROC) (GLuint id, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTUIVPROC) (GLuint id, GLenum pname, GLuint *params);
+typedef void (APIENTRYP PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
+typedef void (APIENTRYP PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
+typedef void (APIENTRYP PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
+typedef GLboolean (APIENTRYP PFNGLISBUFFERPROC) (GLuint buffer);
+typedef void (APIENTRYP PFNGLBUFFERDATAPROC) (GLenum target, GLsizeiptr size, const GLvoid *data, GLenum usage);
+typedef void (APIENTRYP PFNGLBUFFERSUBDATAPROC) (GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid *data);
+typedef void (APIENTRYP PFNGLGETBUFFERSUBDATAPROC) (GLenum target, GLintptr offset, GLsizeiptr size, GLvoid *data);
+typedef GLvoid* (APIENTRYP PFNGLMAPBUFFERPROC) (GLenum target, GLenum access);
+typedef GLboolean (APIENTRYP PFNGLUNMAPBUFFERPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETBUFFERPOINTERVPROC) (GLenum target, GLenum pname, GLvoid* *params);
+#endif
+
+#ifndef GL_VERSION_2_0
+#define GL_VERSION_2_0 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendEquationSeparate (GLenum modeRGB, GLenum modeAlpha);
+GLAPI void APIENTRY glDrawBuffers (GLsizei n, const GLenum *bufs);
+GLAPI void APIENTRY glStencilOpSeparate (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
+GLAPI void APIENTRY glStencilFuncSeparate (GLenum face, GLenum func, GLint ref, GLuint mask);
+GLAPI void APIENTRY glStencilMaskSeparate (GLenum face, GLuint mask);
+GLAPI void APIENTRY glAttachShader (GLuint program, GLuint shader);
+GLAPI void APIENTRY glBindAttribLocation (GLuint program, GLuint index, const GLchar *name);
+GLAPI void APIENTRY glCompileShader (GLuint shader);
+GLAPI GLuint APIENTRY glCreateProgram (void);
+GLAPI GLuint APIENTRY glCreateShader (GLenum type);
+GLAPI void APIENTRY glDeleteProgram (GLuint program);
+GLAPI void APIENTRY glDeleteShader (GLuint shader);
+GLAPI void APIENTRY glDetachShader (GLuint program, GLuint shader);
+GLAPI void APIENTRY glDisableVertexAttribArray (GLuint index);
+GLAPI void APIENTRY glEnableVertexAttribArray (GLuint index);
+GLAPI void APIENTRY glGetActiveAttrib (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
+GLAPI void APIENTRY glGetActiveUniform (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
+GLAPI void APIENTRY glGetAttachedShaders (GLuint program, GLsizei maxCount, GLsizei *count, GLuint *obj);
+GLAPI GLint APIENTRY glGetAttribLocation (GLuint program, const GLchar *name);
+GLAPI void APIENTRY glGetProgramiv (GLuint program, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetProgramInfoLog (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+GLAPI void APIENTRY glGetShaderiv (GLuint shader, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetShaderInfoLog (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+GLAPI void APIENTRY glGetShaderSource (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *source);
+GLAPI GLint APIENTRY glGetUniformLocation (GLuint program, const GLchar *name);
+GLAPI void APIENTRY glGetUniformfv (GLuint program, GLint location, GLfloat *params);
+GLAPI void APIENTRY glGetUniformiv (GLuint program, GLint location, GLint *params);
+GLAPI void APIENTRY glGetVertexAttribdv (GLuint index, GLenum pname, GLdouble *params);
+GLAPI void APIENTRY glGetVertexAttribfv (GLuint index, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetVertexAttribiv (GLuint index, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVertexAttribPointerv (GLuint index, GLenum pname, GLvoid* *pointer);
+GLAPI GLboolean APIENTRY glIsProgram (GLuint program);
+GLAPI GLboolean APIENTRY glIsShader (GLuint shader);
+GLAPI void APIENTRY glLinkProgram (GLuint program);
+GLAPI void APIENTRY glShaderSource (GLuint shader, GLsizei count, const GLchar* *string, const GLint *length);
+GLAPI void APIENTRY glUseProgram (GLuint program);
+GLAPI void APIENTRY glUniform1f (GLint location, GLfloat v0);
+GLAPI void APIENTRY glUniform2f (GLint location, GLfloat v0, GLfloat v1);
+GLAPI void APIENTRY glUniform3f (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+GLAPI void APIENTRY glUniform4f (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+GLAPI void APIENTRY glUniform1i (GLint location, GLint v0);
+GLAPI void APIENTRY glUniform2i (GLint location, GLint v0, GLint v1);
+GLAPI void APIENTRY glUniform3i (GLint location, GLint v0, GLint v1, GLint v2);
+GLAPI void APIENTRY glUniform4i (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+GLAPI void APIENTRY glUniform1fv (GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glUniform2fv (GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glUniform3fv (GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glUniform4fv (GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glUniform1iv (GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glUniform2iv (GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glUniform3iv (GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glUniform4iv (GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glUniformMatrix2fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix3fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix4fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glValidateProgram (GLuint program);
+GLAPI void APIENTRY glVertexAttrib1d (GLuint index, GLdouble x);
+GLAPI void APIENTRY glVertexAttrib1dv (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib1f (GLuint index, GLfloat x);
+GLAPI void APIENTRY glVertexAttrib1fv (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib1s (GLuint index, GLshort x);
+GLAPI void APIENTRY glVertexAttrib1sv (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib2d (GLuint index, GLdouble x, GLdouble y);
+GLAPI void APIENTRY glVertexAttrib2dv (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib2f (GLuint index, GLfloat x, GLfloat y);
+GLAPI void APIENTRY glVertexAttrib2fv (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib2s (GLuint index, GLshort x, GLshort y);
+GLAPI void APIENTRY glVertexAttrib2sv (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib3d (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glVertexAttrib3dv (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib3f (GLuint index, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glVertexAttrib3fv (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib3s (GLuint index, GLshort x, GLshort y, GLshort z);
+GLAPI void APIENTRY glVertexAttrib3sv (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib4Nbv (GLuint index, const GLbyte *v);
+GLAPI void APIENTRY glVertexAttrib4Niv (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttrib4Nsv (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib4Nub (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
+GLAPI void APIENTRY glVertexAttrib4Nubv (GLuint index, const GLubyte *v);
+GLAPI void APIENTRY glVertexAttrib4Nuiv (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttrib4Nusv (GLuint index, const GLushort *v);
+GLAPI void APIENTRY glVertexAttrib4bv (GLuint index, const GLbyte *v);
+GLAPI void APIENTRY glVertexAttrib4d (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glVertexAttrib4dv (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib4f (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glVertexAttrib4fv (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib4iv (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttrib4s (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
+GLAPI void APIENTRY glVertexAttrib4sv (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib4ubv (GLuint index, const GLubyte *v);
+GLAPI void APIENTRY glVertexAttrib4uiv (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttrib4usv (GLuint index, const GLushort *v);
+GLAPI void APIENTRY glVertexAttribPointer (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEPROC) (GLenum modeRGB, GLenum modeAlpha);
+typedef void (APIENTRYP PFNGLDRAWBUFFERSPROC) (GLsizei n, const GLenum *bufs);
+typedef void (APIENTRYP PFNGLSTENCILOPSEPARATEPROC) (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
+typedef void (APIENTRYP PFNGLSTENCILFUNCSEPARATEPROC) (GLenum face, GLenum func, GLint ref, GLuint mask);
+typedef void (APIENTRYP PFNGLSTENCILMASKSEPARATEPROC) (GLenum face, GLuint mask);
+typedef void (APIENTRYP PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
+typedef void (APIENTRYP PFNGLBINDATTRIBLOCATIONPROC) (GLuint program, GLuint index, const GLchar *name);
+typedef void (APIENTRYP PFNGLCOMPILESHADERPROC) (GLuint shader);
+typedef GLuint (APIENTRYP PFNGLCREATEPROGRAMPROC) (void);
+typedef GLuint (APIENTRYP PFNGLCREATESHADERPROC) (GLenum type);
+typedef void (APIENTRYP PFNGLDELETEPROGRAMPROC) (GLuint program);
+typedef void (APIENTRYP PFNGLDELETESHADERPROC) (GLuint shader);
+typedef void (APIENTRYP PFNGLDETACHSHADERPROC) (GLuint program, GLuint shader);
+typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint index);
+typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
+typedef void (APIENTRYP PFNGLGETACTIVEATTRIBPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
+typedef void (APIENTRYP PFNGLGETATTACHEDSHADERSPROC) (GLuint program, GLsizei maxCount, GLsizei *count, GLuint *obj);
+typedef GLint (APIENTRYP PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const GLchar *name);
+typedef void (APIENTRYP PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+typedef void (APIENTRYP PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+typedef void (APIENTRYP PFNGLGETSHADERSOURCEPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *source);
+typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const GLchar *name);
+typedef void (APIENTRYP PFNGLGETUNIFORMFVPROC) (GLuint program, GLint location, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETUNIFORMIVPROC) (GLuint program, GLint location, GLint *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBDVPROC) (GLuint index, GLenum pname, GLdouble *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBFVPROC) (GLuint index, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIVPROC) (GLuint index, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBPOINTERVPROC) (GLuint index, GLenum pname, GLvoid* *pointer);
+typedef GLboolean (APIENTRYP PFNGLISPROGRAMPROC) (GLuint program);
+typedef GLboolean (APIENTRYP PFNGLISSHADERPROC) (GLuint shader);
+typedef void (APIENTRYP PFNGLLINKPROGRAMPROC) (GLuint program);
+typedef void (APIENTRYP PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const GLchar* *string, const GLint *length);
+typedef void (APIENTRYP PFNGLUSEPROGRAMPROC) (GLuint program);
+typedef void (APIENTRYP PFNGLUNIFORM1FPROC) (GLint location, GLfloat v0);
+typedef void (APIENTRYP PFNGLUNIFORM2FPROC) (GLint location, GLfloat v0, GLfloat v1);
+typedef void (APIENTRYP PFNGLUNIFORM3FPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+typedef void (APIENTRYP PFNGLUNIFORM4FPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+typedef void (APIENTRYP PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
+typedef void (APIENTRYP PFNGLUNIFORM2IPROC) (GLint location, GLint v0, GLint v1);
+typedef void (APIENTRYP PFNGLUNIFORM3IPROC) (GLint location, GLint v0, GLint v1, GLint v2);
+typedef void (APIENTRYP PFNGLUNIFORM4IPROC) (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+typedef void (APIENTRYP PFNGLUNIFORM1FVPROC) (GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORM2FVPROC) (GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORM3FVPROC) (GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORM4FVPROC) (GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORM1IVPROC) (GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLUNIFORM2IVPROC) (GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLUNIFORM3IVPROC) (GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLUNIFORM4IVPROC) (GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLVALIDATEPROGRAMPROC) (GLuint program);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1DPROC) (GLuint index, GLdouble x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1DVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1FPROC) (GLuint index, GLfloat x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1FVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1SPROC) (GLuint index, GLshort x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1SVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2DPROC) (GLuint index, GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2DVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2FPROC) (GLuint index, GLfloat x, GLfloat y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2FVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2SPROC) (GLuint index, GLshort x, GLshort y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2SVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3DPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3DVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3FPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3FVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3SPROC) (GLuint index, GLshort x, GLshort y, GLshort z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3SVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NBVPROC) (GLuint index, const GLbyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NIVPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NSVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBPROC) (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBVPROC) (GLuint index, const GLubyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUIVPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUSVPROC) (GLuint index, const GLushort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4BVPROC) (GLuint index, const GLbyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4DPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4DVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4FPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4FVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4IVPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4SPROC) (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4SVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBVPROC) (GLuint index, const GLubyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4UIVPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4USVPROC) (GLuint index, const GLushort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
+#endif
+
+#ifndef GL_VERSION_2_1
+#define GL_VERSION_2_1 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glUniformMatrix2x3fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix3x2fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix2x4fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix4x2fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix3x4fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix4x3fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X3FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X2FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X2FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X3FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+#endif
+
+#ifndef GL_VERSION_3_0
+#define GL_VERSION_3_0 1
+/* OpenGL 3.0 also reuses entry points from these extensions: */
+/* ARB_framebuffer_object */
+/* ARB_map_buffer_range */
+/* ARB_vertex_array_object */
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glColorMaski (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
+GLAPI void APIENTRY glGetBooleani_v (GLenum target, GLuint index, GLboolean *data);
+GLAPI void APIENTRY glGetIntegeri_v (GLenum target, GLuint index, GLint *data);
+GLAPI void APIENTRY glEnablei (GLenum target, GLuint index);
+GLAPI void APIENTRY glDisablei (GLenum target, GLuint index);
+GLAPI GLboolean APIENTRY glIsEnabledi (GLenum target, GLuint index);
+GLAPI void APIENTRY glBeginTransformFeedback (GLenum primitiveMode);
+GLAPI void APIENTRY glEndTransformFeedback (void);
+GLAPI void APIENTRY glBindBufferRange (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
+GLAPI void APIENTRY glBindBufferBase (GLenum target, GLuint index, GLuint buffer);
+GLAPI void APIENTRY glTransformFeedbackVaryings (GLuint program, GLsizei count, const GLchar* *varyings, GLenum bufferMode);
+GLAPI void APIENTRY glGetTransformFeedbackVarying (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
+GLAPI void APIENTRY glClampColor (GLenum target, GLenum clamp);
+GLAPI void APIENTRY glBeginConditionalRender (GLuint id, GLenum mode);
+GLAPI void APIENTRY glEndConditionalRender (void);
+GLAPI void APIENTRY glVertexAttribIPointer (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glGetVertexAttribIiv (GLuint index, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVertexAttribIuiv (GLuint index, GLenum pname, GLuint *params);
+GLAPI void APIENTRY glVertexAttribI1i (GLuint index, GLint x);
+GLAPI void APIENTRY glVertexAttribI2i (GLuint index, GLint x, GLint y);
+GLAPI void APIENTRY glVertexAttribI3i (GLuint index, GLint x, GLint y, GLint z);
+GLAPI void APIENTRY glVertexAttribI4i (GLuint index, GLint x, GLint y, GLint z, GLint w);
+GLAPI void APIENTRY glVertexAttribI1ui (GLuint index, GLuint x);
+GLAPI void APIENTRY glVertexAttribI2ui (GLuint index, GLuint x, GLuint y);
+GLAPI void APIENTRY glVertexAttribI3ui (GLuint index, GLuint x, GLuint y, GLuint z);
+GLAPI void APIENTRY glVertexAttribI4ui (GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+GLAPI void APIENTRY glVertexAttribI1iv (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttribI2iv (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttribI3iv (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttribI4iv (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttribI1uiv (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttribI2uiv (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttribI3uiv (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttribI4uiv (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttribI4bv (GLuint index, const GLbyte *v);
+GLAPI void APIENTRY glVertexAttribI4sv (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttribI4ubv (GLuint index, const GLubyte *v);
+GLAPI void APIENTRY glVertexAttribI4usv (GLuint index, const GLushort *v);
+GLAPI void APIENTRY glGetUniformuiv (GLuint program, GLint location, GLuint *params);
+GLAPI void APIENTRY glBindFragDataLocation (GLuint program, GLuint color, const GLchar *name);
+GLAPI GLint APIENTRY glGetFragDataLocation (GLuint program, const GLchar *name);
+GLAPI void APIENTRY glUniform1ui (GLint location, GLuint v0);
+GLAPI void APIENTRY glUniform2ui (GLint location, GLuint v0, GLuint v1);
+GLAPI void APIENTRY glUniform3ui (GLint location, GLuint v0, GLuint v1, GLuint v2);
+GLAPI void APIENTRY glUniform4ui (GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+GLAPI void APIENTRY glUniform1uiv (GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glUniform2uiv (GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glUniform3uiv (GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glUniform4uiv (GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glTexParameterIiv (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glTexParameterIuiv (GLenum target, GLenum pname, const GLuint *params);
+GLAPI void APIENTRY glGetTexParameterIiv (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetTexParameterIuiv (GLenum target, GLenum pname, GLuint *params);
+GLAPI void APIENTRY glClearBufferiv (GLenum buffer, GLint drawbuffer, const GLint *value);
+GLAPI void APIENTRY glClearBufferuiv (GLenum buffer, GLint drawbuffer, const GLuint *value);
+GLAPI void APIENTRY glClearBufferfv (GLenum buffer, GLint drawbuffer, const GLfloat *value);
+GLAPI void APIENTRY glClearBufferfi (GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
+GLAPI const GLubyte * APIENTRY glGetStringi (GLenum name, GLuint index);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOLORMASKIPROC) (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
+typedef void (APIENTRYP PFNGLGETBOOLEANI_VPROC) (GLenum target, GLuint index, GLboolean *data);
+typedef void (APIENTRYP PFNGLGETINTEGERI_VPROC) (GLenum target, GLuint index, GLint *data);
+typedef void (APIENTRYP PFNGLENABLEIPROC) (GLenum target, GLuint index);
+typedef void (APIENTRYP PFNGLDISABLEIPROC) (GLenum target, GLuint index);
+typedef GLboolean (APIENTRYP PFNGLISENABLEDIPROC) (GLenum target, GLuint index);
+typedef void (APIENTRYP PFNGLBEGINTRANSFORMFEEDBACKPROC) (GLenum primitiveMode);
+typedef void (APIENTRYP PFNGLENDTRANSFORMFEEDBACKPROC) (void);
+typedef void (APIENTRYP PFNGLBINDBUFFERRANGEPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
+typedef void (APIENTRYP PFNGLBINDBUFFERBASEPROC) (GLenum target, GLuint index, GLuint buffer);
+typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKVARYINGSPROC) (GLuint program, GLsizei count, const GLchar* *varyings, GLenum bufferMode);
+typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKVARYINGPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
+typedef void (APIENTRYP PFNGLCLAMPCOLORPROC) (GLenum target, GLenum clamp);
+typedef void (APIENTRYP PFNGLBEGINCONDITIONALRENDERPROC) (GLuint id, GLenum mode);
+typedef void (APIENTRYP PFNGLENDCONDITIONALRENDERPROC) (void);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBIPOINTERPROC) (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIIVPROC) (GLuint index, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIUIVPROC) (GLuint index, GLenum pname, GLuint *params);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IPROC) (GLuint index, GLint x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IPROC) (GLuint index, GLint x, GLint y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IPROC) (GLuint index, GLint x, GLint y, GLint z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IPROC) (GLuint index, GLint x, GLint y, GLint z, GLint w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIPROC) (GLuint index, GLuint x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIPROC) (GLuint index, GLuint x, GLuint y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIPROC) (GLuint index, GLuint x, GLuint y, GLuint z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIPROC) (GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IVPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IVPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IVPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IVPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIVPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIVPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIVPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIVPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4BVPROC) (GLuint index, const GLbyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4SVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UBVPROC) (GLuint index, const GLubyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4USVPROC) (GLuint index, const GLushort *v);
+typedef void (APIENTRYP PFNGLGETUNIFORMUIVPROC) (GLuint program, GLint location, GLuint *params);
+typedef void (APIENTRYP PFNGLBINDFRAGDATALOCATIONPROC) (GLuint program, GLuint color, const GLchar *name);
+typedef GLint (APIENTRYP PFNGLGETFRAGDATALOCATIONPROC) (GLuint program, const GLchar *name);
+typedef void (APIENTRYP PFNGLUNIFORM1UIPROC) (GLint location, GLuint v0);
+typedef void (APIENTRYP PFNGLUNIFORM2UIPROC) (GLint location, GLuint v0, GLuint v1);
+typedef void (APIENTRYP PFNGLUNIFORM3UIPROC) (GLint location, GLuint v0, GLuint v1, GLuint v2);
+typedef void (APIENTRYP PFNGLUNIFORM4UIPROC) (GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+typedef void (APIENTRYP PFNGLUNIFORM1UIVPROC) (GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLUNIFORM2UIVPROC) (GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLUNIFORM3UIVPROC) (GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLUNIFORM4UIVPROC) (GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLTEXPARAMETERIIVPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLTEXPARAMETERIUIVPROC) (GLenum target, GLenum pname, const GLuint *params);
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERIIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERIUIVPROC) (GLenum target, GLenum pname, GLuint *params);
+typedef void (APIENTRYP PFNGLCLEARBUFFERIVPROC) (GLenum buffer, GLint drawbuffer, const GLint *value);
+typedef void (APIENTRYP PFNGLCLEARBUFFERUIVPROC) (GLenum buffer, GLint drawbuffer, const GLuint *value);
+typedef void (APIENTRYP PFNGLCLEARBUFFERFVPROC) (GLenum buffer, GLint drawbuffer, const GLfloat *value);
+typedef void (APIENTRYP PFNGLCLEARBUFFERFIPROC) (GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
+typedef const GLubyte * (APIENTRYP PFNGLGETSTRINGIPROC) (GLenum name, GLuint index);
+#endif
+
+#ifndef GL_VERSION_3_1
+#define GL_VERSION_3_1 1
+/* OpenGL 3.1 also reuses entry points from these extensions: */
+/* ARB_copy_buffer */
+/* ARB_uniform_buffer_object */
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawArraysInstanced (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
+GLAPI void APIENTRY glDrawElementsInstanced (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
+GLAPI void APIENTRY glTexBuffer (GLenum target, GLenum internalformat, GLuint buffer);
+GLAPI void APIENTRY glPrimitiveRestartIndex (GLuint index);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDPROC) (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
+typedef void (APIENTRYP PFNGLTEXBUFFERPROC) (GLenum target, GLenum internalformat, GLuint buffer);
+typedef void (APIENTRYP PFNGLPRIMITIVERESTARTINDEXPROC) (GLuint index);
+#endif
+
+#ifndef GL_VERSION_3_2
+#define GL_VERSION_3_2 1
+/* OpenGL 3.2 also reuses entry points from these extensions: */
+/* ARB_draw_elements_base_vertex */
+/* ARB_provoking_vertex */
+/* ARB_sync */
+/* ARB_texture_multisample */
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetInteger64i_v (GLenum target, GLuint index, GLint64 *data);
+GLAPI void APIENTRY glGetBufferParameteri64v (GLenum target, GLenum pname, GLint64 *params);
+GLAPI void APIENTRY glFramebufferTexture (GLenum target, GLenum attachment, GLuint texture, GLint level);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETINTEGER64I_VPROC) (GLenum target, GLuint index, GLint64 *data);
+typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERI64VPROC) (GLenum target, GLenum pname, GLint64 *params);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level);
+#endif
+
+#ifndef GL_VERSION_3_3
+#define GL_VERSION_3_3 1
+/* OpenGL 3.3 also reuses entry points from these extensions: */
+/* ARB_blend_func_extended */
+/* ARB_sampler_objects */
+/* ARB_explicit_attrib_location, but it has none */
+/* ARB_occlusion_query2 (no entry points) */
+/* ARB_shader_bit_encoding (no entry points) */
+/* ARB_texture_rgb10_a2ui (no entry points) */
+/* ARB_texture_swizzle (no entry points) */
+/* ARB_timer_query */
+/* ARB_vertex_type_2_10_10_10_rev */
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexAttribDivisor (GLuint index, GLuint divisor);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXATTRIBDIVISORPROC) (GLuint index, GLuint divisor);
+#endif
+
+#ifndef GL_VERSION_4_0
+#define GL_VERSION_4_0 1
+/* OpenGL 4.0 also reuses entry points from these extensions: */
+/* ARB_texture_query_lod (no entry points) */
+/* ARB_draw_indirect */
+/* ARB_gpu_shader5 (no entry points) */
+/* ARB_gpu_shader_fp64 */
+/* ARB_shader_subroutine */
+/* ARB_tessellation_shader */
+/* ARB_texture_buffer_object_rgb32 (no entry points) */
+/* ARB_texture_cube_map_array (no entry points) */
+/* ARB_texture_gather (no entry points) */
+/* ARB_transform_feedback2 */
+/* ARB_transform_feedback3 */
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glMinSampleShading (GLclampf value);
+GLAPI void APIENTRY glBlendEquationi (GLuint buf, GLenum mode);
+GLAPI void APIENTRY glBlendEquationSeparatei (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
+GLAPI void APIENTRY glBlendFunci (GLuint buf, GLenum src, GLenum dst);
+GLAPI void APIENTRY glBlendFuncSeparatei (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLMINSAMPLESHADINGPROC) (GLclampf value);
+typedef void (APIENTRYP PFNGLBLENDEQUATIONIPROC) (GLuint buf, GLenum mode);
+typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEIPROC) (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
+typedef void (APIENTRYP PFNGLBLENDFUNCIPROC) (GLuint buf, GLenum src, GLenum dst);
+typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEIPROC) (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
+#endif
+
+#ifndef GL_VERSION_4_1
+#define GL_VERSION_4_1 1
+/* OpenGL 4.1 also reuses entry points from these extensions: */
+/* ARB_ES2_compatibility */
+/* ARB_get_program_binary */
+/* ARB_separate_shader_objects */
+/* ARB_shader_precision (no entry points) */
+/* ARB_vertex_attrib_64bit */
+/* ARB_viewport_array */
+#endif
+
+#ifndef GL_ARB_multitexture
+#define GL_ARB_multitexture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glActiveTextureARB (GLenum texture);
+GLAPI void APIENTRY glClientActiveTextureARB (GLenum texture);
+GLAPI void APIENTRY glMultiTexCoord1dARB (GLenum target, GLdouble s);
+GLAPI void APIENTRY glMultiTexCoord1dvARB (GLenum target, const GLdouble *v);
+GLAPI void APIENTRY glMultiTexCoord1fARB (GLenum target, GLfloat s);
+GLAPI void APIENTRY glMultiTexCoord1fvARB (GLenum target, const GLfloat *v);
+GLAPI void APIENTRY glMultiTexCoord1iARB (GLenum target, GLint s);
+GLAPI void APIENTRY glMultiTexCoord1ivARB (GLenum target, const GLint *v);
+GLAPI void APIENTRY glMultiTexCoord1sARB (GLenum target, GLshort s);
+GLAPI void APIENTRY glMultiTexCoord1svARB (GLenum target, const GLshort *v);
+GLAPI void APIENTRY glMultiTexCoord2dARB (GLenum target, GLdouble s, GLdouble t);
+GLAPI void APIENTRY glMultiTexCoord2dvARB (GLenum target, const GLdouble *v);
+GLAPI void APIENTRY glMultiTexCoord2fARB (GLenum target, GLfloat s, GLfloat t);
+GLAPI void APIENTRY glMultiTexCoord2fvARB (GLenum target, const GLfloat *v);
+GLAPI void APIENTRY glMultiTexCoord2iARB (GLenum target, GLint s, GLint t);
+GLAPI void APIENTRY glMultiTexCoord2ivARB (GLenum target, const GLint *v);
+GLAPI void APIENTRY glMultiTexCoord2sARB (GLenum target, GLshort s, GLshort t);
+GLAPI void APIENTRY glMultiTexCoord2svARB (GLenum target, const GLshort *v);
+GLAPI void APIENTRY glMultiTexCoord3dARB (GLenum target, GLdouble s, GLdouble t, GLdouble r);
+GLAPI void APIENTRY glMultiTexCoord3dvARB (GLenum target, const GLdouble *v);
+GLAPI void APIENTRY glMultiTexCoord3fARB (GLenum target, GLfloat s, GLfloat t, GLfloat r);
+GLAPI void APIENTRY glMultiTexCoord3fvARB (GLenum target, const GLfloat *v);
+GLAPI void APIENTRY glMultiTexCoord3iARB (GLenum target, GLint s, GLint t, GLint r);
+GLAPI void APIENTRY glMultiTexCoord3ivARB (GLenum target, const GLint *v);
+GLAPI void APIENTRY glMultiTexCoord3sARB (GLenum target, GLshort s, GLshort t, GLshort r);
+GLAPI void APIENTRY glMultiTexCoord3svARB (GLenum target, const GLshort *v);
+GLAPI void APIENTRY glMultiTexCoord4dARB (GLenum target, GLdouble s, GLdouble t, GLdouble r, GLdouble q);
+GLAPI void APIENTRY glMultiTexCoord4dvARB (GLenum target, const GLdouble *v);
+GLAPI void APIENTRY glMultiTexCoord4fARB (GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
+GLAPI void APIENTRY glMultiTexCoord4fvARB (GLenum target, const GLfloat *v);
+GLAPI void APIENTRY glMultiTexCoord4iARB (GLenum target, GLint s, GLint t, GLint r, GLint q);
+GLAPI void APIENTRY glMultiTexCoord4ivARB (GLenum target, const GLint *v);
+GLAPI void APIENTRY glMultiTexCoord4sARB (GLenum target, GLshort s, GLshort t, GLshort r, GLshort q);
+GLAPI void APIENTRY glMultiTexCoord4svARB (GLenum target, const GLshort *v);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLACTIVETEXTUREARBPROC) (GLenum texture);
+typedef void (APIENTRYP PFNGLCLIENTACTIVETEXTUREARBPROC) (GLenum texture);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1DARBPROC) (GLenum target, GLdouble s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1DVARBPROC) (GLenum target, const GLdouble *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1FARBPROC) (GLenum target, GLfloat s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1FVARBPROC) (GLenum target, const GLfloat *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1IARBPROC) (GLenum target, GLint s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1IVARBPROC) (GLenum target, const GLint *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1SARBPROC) (GLenum target, GLshort s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1SVARBPROC) (GLenum target, const GLshort *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2DARBPROC) (GLenum target, GLdouble s, GLdouble t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2DVARBPROC) (GLenum target, const GLdouble *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2FARBPROC) (GLenum target, GLfloat s, GLfloat t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2FVARBPROC) (GLenum target, const GLfloat *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2IARBPROC) (GLenum target, GLint s, GLint t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2IVARBPROC) (GLenum target, const GLint *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2SARBPROC) (GLenum target, GLshort s, GLshort t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2SVARBPROC) (GLenum target, const GLshort *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3DARBPROC) (GLenum target, GLdouble s, GLdouble t, GLdouble r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3DVARBPROC) (GLenum target, const GLdouble *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3FARBPROC) (GLenum target, GLfloat s, GLfloat t, GLfloat r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3FVARBPROC) (GLenum target, const GLfloat *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3IARBPROC) (GLenum target, GLint s, GLint t, GLint r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3IVARBPROC) (GLenum target, const GLint *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3SARBPROC) (GLenum target, GLshort s, GLshort t, GLshort r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3SVARBPROC) (GLenum target, const GLshort *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4DARBPROC) (GLenum target, GLdouble s, GLdouble t, GLdouble r, GLdouble q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4DVARBPROC) (GLenum target, const GLdouble *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4FARBPROC) (GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4FVARBPROC) (GLenum target, const GLfloat *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4IARBPROC) (GLenum target, GLint s, GLint t, GLint r, GLint q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4IVARBPROC) (GLenum target, const GLint *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4SARBPROC) (GLenum target, GLshort s, GLshort t, GLshort r, GLshort q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4SVARBPROC) (GLenum target, const GLshort *v);
+#endif
+
+#ifndef GL_ARB_transpose_matrix
+#define GL_ARB_transpose_matrix 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glLoadTransposeMatrixfARB (const GLfloat *m);
+GLAPI void APIENTRY glLoadTransposeMatrixdARB (const GLdouble *m);
+GLAPI void APIENTRY glMultTransposeMatrixfARB (const GLfloat *m);
+GLAPI void APIENTRY glMultTransposeMatrixdARB (const GLdouble *m);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLLOADTRANSPOSEMATRIXFARBPROC) (const GLfloat *m);
+typedef void (APIENTRYP PFNGLLOADTRANSPOSEMATRIXDARBPROC) (const GLdouble *m);
+typedef void (APIENTRYP PFNGLMULTTRANSPOSEMATRIXFARBPROC) (const GLfloat *m);
+typedef void (APIENTRYP PFNGLMULTTRANSPOSEMATRIXDARBPROC) (const GLdouble *m);
+#endif
+
+#ifndef GL_ARB_multisample
+#define GL_ARB_multisample 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glSampleCoverageARB (GLclampf value, GLboolean invert);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSAMPLECOVERAGEARBPROC) (GLclampf value, GLboolean invert);
+#endif
+
+#ifndef GL_ARB_texture_env_add
+#define GL_ARB_texture_env_add 1
+#endif
+
+#ifndef GL_ARB_texture_cube_map
+#define GL_ARB_texture_cube_map 1
+#endif
+
+#ifndef GL_ARB_texture_compression
+#define GL_ARB_texture_compression 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glCompressedTexImage3DARB (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexImage2DARB (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexImage1DARB (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexSubImage3DARB (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexSubImage2DARB (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glCompressedTexSubImage1DARB (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *data);
+GLAPI void APIENTRY glGetCompressedTexImageARB (GLenum target, GLint level, GLvoid *img);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE3DARBPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE2DARBPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXIMAGE1DARBPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE3DARBPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE2DARBPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE1DARBPROC) (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *data);
+typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXIMAGEARBPROC) (GLenum target, GLint level, GLvoid *img);
+#endif
+
+#ifndef GL_ARB_texture_border_clamp
+#define GL_ARB_texture_border_clamp 1
+#endif
+
+#ifndef GL_ARB_point_parameters
+#define GL_ARB_point_parameters 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPointParameterfARB (GLenum pname, GLfloat param);
+GLAPI void APIENTRY glPointParameterfvARB (GLenum pname, const GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFARBPROC) (GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFVARBPROC) (GLenum pname, const GLfloat *params);
+#endif
+
+#ifndef GL_ARB_vertex_blend
+#define GL_ARB_vertex_blend 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glWeightbvARB (GLint size, const GLbyte *weights);
+GLAPI void APIENTRY glWeightsvARB (GLint size, const GLshort *weights);
+GLAPI void APIENTRY glWeightivARB (GLint size, const GLint *weights);
+GLAPI void APIENTRY glWeightfvARB (GLint size, const GLfloat *weights);
+GLAPI void APIENTRY glWeightdvARB (GLint size, const GLdouble *weights);
+GLAPI void APIENTRY glWeightubvARB (GLint size, const GLubyte *weights);
+GLAPI void APIENTRY glWeightusvARB (GLint size, const GLushort *weights);
+GLAPI void APIENTRY glWeightuivARB (GLint size, const GLuint *weights);
+GLAPI void APIENTRY glWeightPointerARB (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glVertexBlendARB (GLint count);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLWEIGHTBVARBPROC) (GLint size, const GLbyte *weights);
+typedef void (APIENTRYP PFNGLWEIGHTSVARBPROC) (GLint size, const GLshort *weights);
+typedef void (APIENTRYP PFNGLWEIGHTIVARBPROC) (GLint size, const GLint *weights);
+typedef void (APIENTRYP PFNGLWEIGHTFVARBPROC) (GLint size, const GLfloat *weights);
+typedef void (APIENTRYP PFNGLWEIGHTDVARBPROC) (GLint size, const GLdouble *weights);
+typedef void (APIENTRYP PFNGLWEIGHTUBVARBPROC) (GLint size, const GLubyte *weights);
+typedef void (APIENTRYP PFNGLWEIGHTUSVARBPROC) (GLint size, const GLushort *weights);
+typedef void (APIENTRYP PFNGLWEIGHTUIVARBPROC) (GLint size, const GLuint *weights);
+typedef void (APIENTRYP PFNGLWEIGHTPOINTERARBPROC) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLVERTEXBLENDARBPROC) (GLint count);
+#endif
+
+#ifndef GL_ARB_matrix_palette
+#define GL_ARB_matrix_palette 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glCurrentPaletteMatrixARB (GLint index);
+GLAPI void APIENTRY glMatrixIndexubvARB (GLint size, const GLubyte *indices);
+GLAPI void APIENTRY glMatrixIndexusvARB (GLint size, const GLushort *indices);
+GLAPI void APIENTRY glMatrixIndexuivARB (GLint size, const GLuint *indices);
+GLAPI void APIENTRY glMatrixIndexPointerARB (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCURRENTPALETTEMATRIXARBPROC) (GLint index);
+typedef void (APIENTRYP PFNGLMATRIXINDEXUBVARBPROC) (GLint size, const GLubyte *indices);
+typedef void (APIENTRYP PFNGLMATRIXINDEXUSVARBPROC) (GLint size, const GLushort *indices);
+typedef void (APIENTRYP PFNGLMATRIXINDEXUIVARBPROC) (GLint size, const GLuint *indices);
+typedef void (APIENTRYP PFNGLMATRIXINDEXPOINTERARBPROC) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif
+
+#ifndef GL_ARB_texture_env_combine
+#define GL_ARB_texture_env_combine 1
+#endif
+
+#ifndef GL_ARB_texture_env_crossbar
+#define GL_ARB_texture_env_crossbar 1
+#endif
+
+#ifndef GL_ARB_texture_env_dot3
+#define GL_ARB_texture_env_dot3 1
+#endif
+
+#ifndef GL_ARB_texture_mirrored_repeat
+#define GL_ARB_texture_mirrored_repeat 1
+#endif
+
+#ifndef GL_ARB_depth_texture
+#define GL_ARB_depth_texture 1
+#endif
+
+#ifndef GL_ARB_shadow
+#define GL_ARB_shadow 1
+#endif
+
+#ifndef GL_ARB_shadow_ambient
+#define GL_ARB_shadow_ambient 1
+#endif
+
+#ifndef GL_ARB_window_pos
+#define GL_ARB_window_pos 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glWindowPos2dARB (GLdouble x, GLdouble y);
+GLAPI void APIENTRY glWindowPos2dvARB (const GLdouble *v);
+GLAPI void APIENTRY glWindowPos2fARB (GLfloat x, GLfloat y);
+GLAPI void APIENTRY glWindowPos2fvARB (const GLfloat *v);
+GLAPI void APIENTRY glWindowPos2iARB (GLint x, GLint y);
+GLAPI void APIENTRY glWindowPos2ivARB (const GLint *v);
+GLAPI void APIENTRY glWindowPos2sARB (GLshort x, GLshort y);
+GLAPI void APIENTRY glWindowPos2svARB (const GLshort *v);
+GLAPI void APIENTRY glWindowPos3dARB (GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glWindowPos3dvARB (const GLdouble *v);
+GLAPI void APIENTRY glWindowPos3fARB (GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glWindowPos3fvARB (const GLfloat *v);
+GLAPI void APIENTRY glWindowPos3iARB (GLint x, GLint y, GLint z);
+GLAPI void APIENTRY glWindowPos3ivARB (const GLint *v);
+GLAPI void APIENTRY glWindowPos3sARB (GLshort x, GLshort y, GLshort z);
+GLAPI void APIENTRY glWindowPos3svARB (const GLshort *v);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLWINDOWPOS2DARBPROC) (GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2DVARBPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2FARBPROC) (GLfloat x, GLfloat y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2FVARBPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2IARBPROC) (GLint x, GLint y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2IVARBPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2SARBPROC) (GLshort x, GLshort y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2SVARBPROC) (const GLshort *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3DARBPROC) (GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3DVARBPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3FARBPROC) (GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3FVARBPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3IARBPROC) (GLint x, GLint y, GLint z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3IVARBPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3SARBPROC) (GLshort x, GLshort y, GLshort z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3SVARBPROC) (const GLshort *v);
+#endif
+
+#ifndef GL_ARB_vertex_program
+#define GL_ARB_vertex_program 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexAttrib1dARB (GLuint index, GLdouble x);
+GLAPI void APIENTRY glVertexAttrib1dvARB (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib1fARB (GLuint index, GLfloat x);
+GLAPI void APIENTRY glVertexAttrib1fvARB (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib1sARB (GLuint index, GLshort x);
+GLAPI void APIENTRY glVertexAttrib1svARB (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib2dARB (GLuint index, GLdouble x, GLdouble y);
+GLAPI void APIENTRY glVertexAttrib2dvARB (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib2fARB (GLuint index, GLfloat x, GLfloat y);
+GLAPI void APIENTRY glVertexAttrib2fvARB (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib2sARB (GLuint index, GLshort x, GLshort y);
+GLAPI void APIENTRY glVertexAttrib2svARB (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib3dARB (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glVertexAttrib3dvARB (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib3fARB (GLuint index, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glVertexAttrib3fvARB (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib3sARB (GLuint index, GLshort x, GLshort y, GLshort z);
+GLAPI void APIENTRY glVertexAttrib3svARB (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib4NbvARB (GLuint index, const GLbyte *v);
+GLAPI void APIENTRY glVertexAttrib4NivARB (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttrib4NsvARB (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib4NubARB (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
+GLAPI void APIENTRY glVertexAttrib4NubvARB (GLuint index, const GLubyte *v);
+GLAPI void APIENTRY glVertexAttrib4NuivARB (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttrib4NusvARB (GLuint index, const GLushort *v);
+GLAPI void APIENTRY glVertexAttrib4bvARB (GLuint index, const GLbyte *v);
+GLAPI void APIENTRY glVertexAttrib4dARB (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glVertexAttrib4dvARB (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib4fARB (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glVertexAttrib4fvARB (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib4ivARB (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttrib4sARB (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
+GLAPI void APIENTRY glVertexAttrib4svARB (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib4ubvARB (GLuint index, const GLubyte *v);
+GLAPI void APIENTRY glVertexAttrib4uivARB (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttrib4usvARB (GLuint index, const GLushort *v);
+GLAPI void APIENTRY glVertexAttribPointerARB (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glEnableVertexAttribArrayARB (GLuint index);
+GLAPI void APIENTRY glDisableVertexAttribArrayARB (GLuint index);
+GLAPI void APIENTRY glProgramStringARB (GLenum target, GLenum format, GLsizei len, const GLvoid *string);
+GLAPI void APIENTRY glBindProgramARB (GLenum target, GLuint program);
+GLAPI void APIENTRY glDeleteProgramsARB (GLsizei n, const GLuint *programs);
+GLAPI void APIENTRY glGenProgramsARB (GLsizei n, GLuint *programs);
+GLAPI void APIENTRY glProgramEnvParameter4dARB (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glProgramEnvParameter4dvARB (GLenum target, GLuint index, const GLdouble *params);
+GLAPI void APIENTRY glProgramEnvParameter4fARB (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glProgramEnvParameter4fvARB (GLenum target, GLuint index, const GLfloat *params);
+GLAPI void APIENTRY glProgramLocalParameter4dARB (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glProgramLocalParameter4dvARB (GLenum target, GLuint index, const GLdouble *params);
+GLAPI void APIENTRY glProgramLocalParameter4fARB (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glProgramLocalParameter4fvARB (GLenum target, GLuint index, const GLfloat *params);
+GLAPI void APIENTRY glGetProgramEnvParameterdvARB (GLenum target, GLuint index, GLdouble *params);
+GLAPI void APIENTRY glGetProgramEnvParameterfvARB (GLenum target, GLuint index, GLfloat *params);
+GLAPI void APIENTRY glGetProgramLocalParameterdvARB (GLenum target, GLuint index, GLdouble *params);
+GLAPI void APIENTRY glGetProgramLocalParameterfvARB (GLenum target, GLuint index, GLfloat *params);
+GLAPI void APIENTRY glGetProgramivARB (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetProgramStringARB (GLenum target, GLenum pname, GLvoid *string);
+GLAPI void APIENTRY glGetVertexAttribdvARB (GLuint index, GLenum pname, GLdouble *params);
+GLAPI void APIENTRY glGetVertexAttribfvARB (GLuint index, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetVertexAttribivARB (GLuint index, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVertexAttribPointervARB (GLuint index, GLenum pname, GLvoid* *pointer);
+GLAPI GLboolean APIENTRY glIsProgramARB (GLuint program);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1DARBPROC) (GLuint index, GLdouble x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1DVARBPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1FARBPROC) (GLuint index, GLfloat x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1FVARBPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1SARBPROC) (GLuint index, GLshort x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1SVARBPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2DARBPROC) (GLuint index, GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2DVARBPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2FARBPROC) (GLuint index, GLfloat x, GLfloat y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2FVARBPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2SARBPROC) (GLuint index, GLshort x, GLshort y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2SVARBPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3DARBPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3DVARBPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3FARBPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3FVARBPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3SARBPROC) (GLuint index, GLshort x, GLshort y, GLshort z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3SVARBPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NBVARBPROC) (GLuint index, const GLbyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NIVARBPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NSVARBPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBARBPROC) (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUBVARBPROC) (GLuint index, const GLubyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUIVARBPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4NUSVARBPROC) (GLuint index, const GLushort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4BVARBPROC) (GLuint index, const GLbyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4DARBPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4DVARBPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4FARBPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4FVARBPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4IVARBPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4SARBPROC) (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4SVARBPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBVARBPROC) (GLuint index, const GLubyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4UIVARBPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4USVARBPROC) (GLuint index, const GLushort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERARBPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYARBPROC) (GLuint index);
+typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYARBPROC) (GLuint index);
+typedef void (APIENTRYP PFNGLPROGRAMSTRINGARBPROC) (GLenum target, GLenum format, GLsizei len, const GLvoid *string);
+typedef void (APIENTRYP PFNGLBINDPROGRAMARBPROC) (GLenum target, GLuint program);
+typedef void (APIENTRYP PFNGLDELETEPROGRAMSARBPROC) (GLsizei n, const GLuint *programs);
+typedef void (APIENTRYP PFNGLGENPROGRAMSARBPROC) (GLsizei n, GLuint *programs);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETER4DARBPROC) (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETER4DVARBPROC) (GLenum target, GLuint index, const GLdouble *params);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETER4FARBPROC) (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETER4FVARBPROC) (GLenum target, GLuint index, const GLfloat *params);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETER4DARBPROC) (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETER4DVARBPROC) (GLenum target, GLuint index, const GLdouble *params);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETER4FARBPROC) (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) (GLenum target, GLuint index, const GLfloat *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMENVPARAMETERDVARBPROC) (GLenum target, GLuint index, GLdouble *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMENVPARAMETERFVARBPROC) (GLenum target, GLuint index, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) (GLenum target, GLuint index, GLdouble *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMLOCALPARAMETERFVARBPROC) (GLenum target, GLuint index, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMIVARBPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMSTRINGARBPROC) (GLenum target, GLenum pname, GLvoid *string);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBDVARBPROC) (GLuint index, GLenum pname, GLdouble *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBFVARBPROC) (GLuint index, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIVARBPROC) (GLuint index, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBPOINTERVARBPROC) (GLuint index, GLenum pname, GLvoid* *pointer);
+typedef GLboolean (APIENTRYP PFNGLISPROGRAMARBPROC) (GLuint program);
+#endif
+
+#ifndef GL_ARB_fragment_program
+#define GL_ARB_fragment_program 1
+/* All ARB_fragment_program entry points are shared with ARB_vertex_program. */
+#endif
+
+#ifndef GL_ARB_vertex_buffer_object
+#define GL_ARB_vertex_buffer_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBindBufferARB (GLenum target, GLuint buffer);
+GLAPI void APIENTRY glDeleteBuffersARB (GLsizei n, const GLuint *buffers);
+GLAPI void APIENTRY glGenBuffersARB (GLsizei n, GLuint *buffers);
+GLAPI GLboolean APIENTRY glIsBufferARB (GLuint buffer);
+GLAPI void APIENTRY glBufferDataARB (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
+GLAPI void APIENTRY glBufferSubDataARB (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data);
+GLAPI void APIENTRY glGetBufferSubDataARB (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid *data);
+GLAPI GLvoid* APIENTRY glMapBufferARB (GLenum target, GLenum access);
+GLAPI GLboolean APIENTRY glUnmapBufferARB (GLenum target);
+GLAPI void APIENTRY glGetBufferParameterivARB (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetBufferPointervARB (GLenum target, GLenum pname, GLvoid* *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBINDBUFFERARBPROC) (GLenum target, GLuint buffer);
+typedef void (APIENTRYP PFNGLDELETEBUFFERSARBPROC) (GLsizei n, const GLuint *buffers);
+typedef void (APIENTRYP PFNGLGENBUFFERSARBPROC) (GLsizei n, GLuint *buffers);
+typedef GLboolean (APIENTRYP PFNGLISBUFFERARBPROC) (GLuint buffer);
+typedef void (APIENTRYP PFNGLBUFFERDATAARBPROC) (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
+typedef void (APIENTRYP PFNGLBUFFERSUBDATAARBPROC) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data);
+typedef void (APIENTRYP PFNGLGETBUFFERSUBDATAARBPROC) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid *data);
+typedef GLvoid* (APIENTRYP PFNGLMAPBUFFERARBPROC) (GLenum target, GLenum access);
+typedef GLboolean (APIENTRYP PFNGLUNMAPBUFFERARBPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERIVARBPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETBUFFERPOINTERVARBPROC) (GLenum target, GLenum pname, GLvoid* *params);
+#endif
+
+#ifndef GL_ARB_occlusion_query
+#define GL_ARB_occlusion_query 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGenQueriesARB (GLsizei n, GLuint *ids);
+GLAPI void APIENTRY glDeleteQueriesARB (GLsizei n, const GLuint *ids);
+GLAPI GLboolean APIENTRY glIsQueryARB (GLuint id);
+GLAPI void APIENTRY glBeginQueryARB (GLenum target, GLuint id);
+GLAPI void APIENTRY glEndQueryARB (GLenum target);
+GLAPI void APIENTRY glGetQueryivARB (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetQueryObjectivARB (GLuint id, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetQueryObjectuivARB (GLuint id, GLenum pname, GLuint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGENQUERIESARBPROC) (GLsizei n, GLuint *ids);
+typedef void (APIENTRYP PFNGLDELETEQUERIESARBPROC) (GLsizei n, const GLuint *ids);
+typedef GLboolean (APIENTRYP PFNGLISQUERYARBPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLBEGINQUERYARBPROC) (GLenum target, GLuint id);
+typedef void (APIENTRYP PFNGLENDQUERYARBPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLGETQUERYIVARBPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTIVARBPROC) (GLuint id, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTUIVARBPROC) (GLuint id, GLenum pname, GLuint *params);
+#endif
+
+#ifndef GL_ARB_shader_objects
+#define GL_ARB_shader_objects 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDeleteObjectARB (GLhandleARB obj);
+GLAPI GLhandleARB APIENTRY glGetHandleARB (GLenum pname);
+GLAPI void APIENTRY glDetachObjectARB (GLhandleARB containerObj, GLhandleARB attachedObj);
+GLAPI GLhandleARB APIENTRY glCreateShaderObjectARB (GLenum shaderType);
+GLAPI void APIENTRY glShaderSourceARB (GLhandleARB shaderObj, GLsizei count, const GLcharARB* *string, const GLint *length);
+GLAPI void APIENTRY glCompileShaderARB (GLhandleARB shaderObj);
+GLAPI GLhandleARB APIENTRY glCreateProgramObjectARB (void);
+GLAPI void APIENTRY glAttachObjectARB (GLhandleARB containerObj, GLhandleARB obj);
+GLAPI void APIENTRY glLinkProgramARB (GLhandleARB programObj);
+GLAPI void APIENTRY glUseProgramObjectARB (GLhandleARB programObj);
+GLAPI void APIENTRY glValidateProgramARB (GLhandleARB programObj);
+GLAPI void APIENTRY glUniform1fARB (GLint location, GLfloat v0);
+GLAPI void APIENTRY glUniform2fARB (GLint location, GLfloat v0, GLfloat v1);
+GLAPI void APIENTRY glUniform3fARB (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+GLAPI void APIENTRY glUniform4fARB (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+GLAPI void APIENTRY glUniform1iARB (GLint location, GLint v0);
+GLAPI void APIENTRY glUniform2iARB (GLint location, GLint v0, GLint v1);
+GLAPI void APIENTRY glUniform3iARB (GLint location, GLint v0, GLint v1, GLint v2);
+GLAPI void APIENTRY glUniform4iARB (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+GLAPI void APIENTRY glUniform1fvARB (GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glUniform2fvARB (GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glUniform3fvARB (GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glUniform4fvARB (GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glUniform1ivARB (GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glUniform2ivARB (GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glUniform3ivARB (GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glUniform4ivARB (GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glUniformMatrix2fvARB (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix3fvARB (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glUniformMatrix4fvARB (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glGetObjectParameterfvARB (GLhandleARB obj, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetObjectParameterivARB (GLhandleARB obj, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetInfoLogARB (GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *infoLog);
+GLAPI void APIENTRY glGetAttachedObjectsARB (GLhandleARB containerObj, GLsizei maxCount, GLsizei *count, GLhandleARB *obj);
+GLAPI GLint APIENTRY glGetUniformLocationARB (GLhandleARB programObj, const GLcharARB *name);
+GLAPI void APIENTRY glGetActiveUniformARB (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
+GLAPI void APIENTRY glGetUniformfvARB (GLhandleARB programObj, GLint location, GLfloat *params);
+GLAPI void APIENTRY glGetUniformivARB (GLhandleARB programObj, GLint location, GLint *params);
+GLAPI void APIENTRY glGetShaderSourceARB (GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *source);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDELETEOBJECTARBPROC) (GLhandleARB obj);
+typedef GLhandleARB (APIENTRYP PFNGLGETHANDLEARBPROC) (GLenum pname);
+typedef void (APIENTRYP PFNGLDETACHOBJECTARBPROC) (GLhandleARB containerObj, GLhandleARB attachedObj);
+typedef GLhandleARB (APIENTRYP PFNGLCREATESHADEROBJECTARBPROC) (GLenum shaderType);
+typedef void (APIENTRYP PFNGLSHADERSOURCEARBPROC) (GLhandleARB shaderObj, GLsizei count, const GLcharARB* *string, const GLint *length);
+typedef void (APIENTRYP PFNGLCOMPILESHADERARBPROC) (GLhandleARB shaderObj);
+typedef GLhandleARB (APIENTRYP PFNGLCREATEPROGRAMOBJECTARBPROC) (void);
+typedef void (APIENTRYP PFNGLATTACHOBJECTARBPROC) (GLhandleARB containerObj, GLhandleARB obj);
+typedef void (APIENTRYP PFNGLLINKPROGRAMARBPROC) (GLhandleARB programObj);
+typedef void (APIENTRYP PFNGLUSEPROGRAMOBJECTARBPROC) (GLhandleARB programObj);
+typedef void (APIENTRYP PFNGLVALIDATEPROGRAMARBPROC) (GLhandleARB programObj);
+typedef void (APIENTRYP PFNGLUNIFORM1FARBPROC) (GLint location, GLfloat v0);
+typedef void (APIENTRYP PFNGLUNIFORM2FARBPROC) (GLint location, GLfloat v0, GLfloat v1);
+typedef void (APIENTRYP PFNGLUNIFORM3FARBPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+typedef void (APIENTRYP PFNGLUNIFORM4FARBPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+typedef void (APIENTRYP PFNGLUNIFORM1IARBPROC) (GLint location, GLint v0);
+typedef void (APIENTRYP PFNGLUNIFORM2IARBPROC) (GLint location, GLint v0, GLint v1);
+typedef void (APIENTRYP PFNGLUNIFORM3IARBPROC) (GLint location, GLint v0, GLint v1, GLint v2);
+typedef void (APIENTRYP PFNGLUNIFORM4IARBPROC) (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+typedef void (APIENTRYP PFNGLUNIFORM1FVARBPROC) (GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORM2FVARBPROC) (GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORM3FVARBPROC) (GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORM4FVARBPROC) (GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORM1IVARBPROC) (GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLUNIFORM2IVARBPROC) (GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLUNIFORM3IVARBPROC) (GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLUNIFORM4IVARBPROC) (GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2FVARBPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3FVARBPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4FVARBPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLGETOBJECTPARAMETERFVARBPROC) (GLhandleARB obj, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETOBJECTPARAMETERIVARBPROC) (GLhandleARB obj, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETINFOLOGARBPROC) (GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *infoLog);
+typedef void (APIENTRYP PFNGLGETATTACHEDOBJECTSARBPROC) (GLhandleARB containerObj, GLsizei maxCount, GLsizei *count, GLhandleARB *obj);
+typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONARBPROC) (GLhandleARB programObj, const GLcharARB *name);
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMARBPROC) (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
+typedef void (APIENTRYP PFNGLGETUNIFORMFVARBPROC) (GLhandleARB programObj, GLint location, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETUNIFORMIVARBPROC) (GLhandleARB programObj, GLint location, GLint *params);
+typedef void (APIENTRYP PFNGLGETSHADERSOURCEARBPROC) (GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *source);
+#endif
+
+#ifndef GL_ARB_vertex_shader
+#define GL_ARB_vertex_shader 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBindAttribLocationARB (GLhandleARB programObj, GLuint index, const GLcharARB *name);
+GLAPI void APIENTRY glGetActiveAttribARB (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
+GLAPI GLint APIENTRY glGetAttribLocationARB (GLhandleARB programObj, const GLcharARB *name);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBINDATTRIBLOCATIONARBPROC) (GLhandleARB programObj, GLuint index, const GLcharARB *name);
+typedef void (APIENTRYP PFNGLGETACTIVEATTRIBARBPROC) (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
+typedef GLint (APIENTRYP PFNGLGETATTRIBLOCATIONARBPROC) (GLhandleARB programObj, const GLcharARB *name);
+#endif
+
+#ifndef GL_ARB_fragment_shader
+#define GL_ARB_fragment_shader 1
+#endif
+
+#ifndef GL_ARB_shading_language_100
+#define GL_ARB_shading_language_100 1
+#endif
+
+#ifndef GL_ARB_texture_non_power_of_two
+#define GL_ARB_texture_non_power_of_two 1
+#endif
+
+#ifndef GL_ARB_point_sprite
+#define GL_ARB_point_sprite 1
+#endif
+
+#ifndef GL_ARB_fragment_program_shadow
+#define GL_ARB_fragment_program_shadow 1
+#endif
+
+#ifndef GL_ARB_draw_buffers
+#define GL_ARB_draw_buffers 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawBuffersARB (GLsizei n, const GLenum *bufs);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWBUFFERSARBPROC) (GLsizei n, const GLenum *bufs);
+#endif
+
+#ifndef GL_ARB_texture_rectangle
+#define GL_ARB_texture_rectangle 1
+#endif
+
+#ifndef GL_ARB_color_buffer_float
+#define GL_ARB_color_buffer_float 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glClampColorARB (GLenum target, GLenum clamp);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCLAMPCOLORARBPROC) (GLenum target, GLenum clamp);
+#endif
+
+#ifndef GL_ARB_half_float_pixel
+#define GL_ARB_half_float_pixel 1
+#endif
+
+#ifndef GL_ARB_texture_float
+#define GL_ARB_texture_float 1
+#endif
+
+#ifndef GL_ARB_pixel_buffer_object
+#define GL_ARB_pixel_buffer_object 1
+#endif
+
+#ifndef GL_ARB_depth_buffer_float
+#define GL_ARB_depth_buffer_float 1
+#endif
+
+#ifndef GL_ARB_draw_instanced
+#define GL_ARB_draw_instanced 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawArraysInstancedARB (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
+GLAPI void APIENTRY glDrawElementsInstancedARB (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDARBPROC) (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDARBPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
+#endif
+
+#ifndef GL_ARB_framebuffer_object
+#define GL_ARB_framebuffer_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLboolean APIENTRY glIsRenderbuffer (GLuint renderbuffer);
+GLAPI void APIENTRY glBindRenderbuffer (GLenum target, GLuint renderbuffer);
+GLAPI void APIENTRY glDeleteRenderbuffers (GLsizei n, const GLuint *renderbuffers);
+GLAPI void APIENTRY glGenRenderbuffers (GLsizei n, GLuint *renderbuffers);
+GLAPI void APIENTRY glRenderbufferStorage (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glGetRenderbufferParameteriv (GLenum target, GLenum pname, GLint *params);
+GLAPI GLboolean APIENTRY glIsFramebuffer (GLuint framebuffer);
+GLAPI void APIENTRY glBindFramebuffer (GLenum target, GLuint framebuffer);
+GLAPI void APIENTRY glDeleteFramebuffers (GLsizei n, const GLuint *framebuffers);
+GLAPI void APIENTRY glGenFramebuffers (GLsizei n, GLuint *framebuffers);
+GLAPI GLenum APIENTRY glCheckFramebufferStatus (GLenum target);
+GLAPI void APIENTRY glFramebufferTexture1D (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+GLAPI void APIENTRY glFramebufferTexture2D (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+GLAPI void APIENTRY glFramebufferTexture3D (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+GLAPI void APIENTRY glFramebufferRenderbuffer (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+GLAPI void APIENTRY glGetFramebufferAttachmentParameteriv (GLenum target, GLenum attachment, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGenerateMipmap (GLenum target);
+GLAPI void APIENTRY glBlitFramebuffer (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+GLAPI void APIENTRY glRenderbufferStorageMultisample (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glFramebufferTextureLayer (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLboolean (APIENTRYP PFNGLISRENDERBUFFERPROC) (GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLBINDRENDERBUFFERPROC) (GLenum target, GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLDELETERENDERBUFFERSPROC) (GLsizei n, const GLuint *renderbuffers);
+typedef void (APIENTRYP PFNGLGENRENDERBUFFERSPROC) (GLsizei n, GLuint *renderbuffers);
+typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLGETRENDERBUFFERPARAMETERIVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef GLboolean (APIENTRYP PFNGLISFRAMEBUFFERPROC) (GLuint framebuffer);
+typedef void (APIENTRYP PFNGLBINDFRAMEBUFFERPROC) (GLenum target, GLuint framebuffer);
+typedef void (APIENTRYP PFNGLDELETEFRAMEBUFFERSPROC) (GLsizei n, const GLuint *framebuffers);
+typedef void (APIENTRYP PFNGLGENFRAMEBUFFERSPROC) (GLsizei n, GLuint *framebuffers);
+typedef GLenum (APIENTRYP PFNGLCHECKFRAMEBUFFERSTATUSPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE1DPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE2DPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE3DPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERRENDERBUFFERPROC) (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) (GLenum target, GLenum attachment, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGENERATEMIPMAPPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLBLITFRAMEBUFFERPROC) (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC) (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURELAYERPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
+#endif
+
+#ifndef GL_ARB_framebuffer_sRGB
+#define GL_ARB_framebuffer_sRGB 1
+#endif
+
+#ifndef GL_ARB_geometry_shader4
+#define GL_ARB_geometry_shader4 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProgramParameteriARB (GLuint program, GLenum pname, GLint value);
+GLAPI void APIENTRY glFramebufferTextureARB (GLenum target, GLenum attachment, GLuint texture, GLint level);
+GLAPI void APIENTRY glFramebufferTextureLayerARB (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
+GLAPI void APIENTRY glFramebufferTextureFaceARB (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETERIARBPROC) (GLuint program, GLenum pname, GLint value);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREARBPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURELAYERARBPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREFACEARBPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face);
+#endif
+
+#ifndef GL_ARB_half_float_vertex
+#define GL_ARB_half_float_vertex 1
+#endif
+
+#ifndef GL_ARB_instanced_arrays
+#define GL_ARB_instanced_arrays 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexAttribDivisorARB (GLuint index, GLuint divisor);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXATTRIBDIVISORARBPROC) (GLuint index, GLuint divisor);
+#endif
+
+#ifndef GL_ARB_map_buffer_range
+#define GL_ARB_map_buffer_range 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLvoid* APIENTRY glMapBufferRange (GLenum target, GLintptr offset, GLsizeiptr length, GLbitfield access);
+GLAPI void APIENTRY glFlushMappedBufferRange (GLenum target, GLintptr offset, GLsizeiptr length);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLvoid* (APIENTRYP PFNGLMAPBUFFERRANGEPROC) (GLenum target, GLintptr offset, GLsizeiptr length, GLbitfield access);
+typedef void (APIENTRYP PFNGLFLUSHMAPPEDBUFFERRANGEPROC) (GLenum target, GLintptr offset, GLsizeiptr length);
+#endif
+
+#ifndef GL_ARB_texture_buffer_object
+#define GL_ARB_texture_buffer_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTexBufferARB (GLenum target, GLenum internalformat, GLuint buffer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXBUFFERARBPROC) (GLenum target, GLenum internalformat, GLuint buffer);
+#endif
+
+#ifndef GL_ARB_texture_compression_rgtc
+#define GL_ARB_texture_compression_rgtc 1
+#endif
+
+#ifndef GL_ARB_texture_rg
+#define GL_ARB_texture_rg 1
+#endif
+
+#ifndef GL_ARB_vertex_array_object
+#define GL_ARB_vertex_array_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBindVertexArray (GLuint array);
+GLAPI void APIENTRY glDeleteVertexArrays (GLsizei n, const GLuint *arrays);
+GLAPI void APIENTRY glGenVertexArrays (GLsizei n, GLuint *arrays);
+GLAPI GLboolean APIENTRY glIsVertexArray (GLuint array);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBINDVERTEXARRAYPROC) (GLuint array);
+typedef void (APIENTRYP PFNGLDELETEVERTEXARRAYSPROC) (GLsizei n, const GLuint *arrays);
+typedef void (APIENTRYP PFNGLGENVERTEXARRAYSPROC) (GLsizei n, GLuint *arrays);
+typedef GLboolean (APIENTRYP PFNGLISVERTEXARRAYPROC) (GLuint array);
+#endif
+
+#ifndef GL_ARB_uniform_buffer_object
+#define GL_ARB_uniform_buffer_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetUniformIndices (GLuint program, GLsizei uniformCount, const GLchar* *uniformNames, GLuint *uniformIndices);
+GLAPI void APIENTRY glGetActiveUniformsiv (GLuint program, GLsizei uniformCount, const GLuint *uniformIndices, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetActiveUniformName (GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformName);
+GLAPI GLuint APIENTRY glGetUniformBlockIndex (GLuint program, const GLchar *uniformBlockName);
+GLAPI void APIENTRY glGetActiveUniformBlockiv (GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetActiveUniformBlockName (GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformBlockName);
+GLAPI void APIENTRY glUniformBlockBinding (GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETUNIFORMINDICESPROC) (GLuint program, GLsizei uniformCount, const GLchar* *uniformNames, GLuint *uniformIndices);
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMSIVPROC) (GLuint program, GLsizei uniformCount, const GLuint *uniformIndices, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMNAMEPROC) (GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformName);
+typedef GLuint (APIENTRYP PFNGLGETUNIFORMBLOCKINDEXPROC) (GLuint program, const GLchar *uniformBlockName);
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMBLOCKIVPROC) (GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC) (GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformBlockName);
+typedef void (APIENTRYP PFNGLUNIFORMBLOCKBINDINGPROC) (GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
+#endif
+
+#ifndef GL_ARB_compatibility
+#define GL_ARB_compatibility 1
+#endif
+
+#ifndef GL_ARB_copy_buffer
+#define GL_ARB_copy_buffer 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glCopyBufferSubData (GLenum readTarget, GLenum writeTarget, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOPYBUFFERSUBDATAPROC) (GLenum readTarget, GLenum writeTarget, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
+#endif
+
+#ifndef GL_ARB_shader_texture_lod
+#define GL_ARB_shader_texture_lod 1
+#endif
+
+#ifndef GL_ARB_depth_clamp
+#define GL_ARB_depth_clamp 1
+#endif
+
+#ifndef GL_ARB_draw_elements_base_vertex
+#define GL_ARB_draw_elements_base_vertex 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawElementsBaseVertex (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex);
+GLAPI void APIENTRY glDrawRangeElementsBaseVertex (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex);
+GLAPI void APIENTRY glDrawElementsInstancedBaseVertex (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount, GLint basevertex);
+GLAPI void APIENTRY glMultiDrawElementsBaseVertex (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount, const GLint *basevertex);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWELEMENTSBASEVERTEXPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex);
+typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices, GLint basevertex);
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount, GLint basevertex);
+typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC) (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount, const GLint *basevertex);
+#endif
+
+#ifndef GL_ARB_fragment_coord_conventions
+#define GL_ARB_fragment_coord_conventions 1
+#endif
+
+#ifndef GL_ARB_provoking_vertex
+#define GL_ARB_provoking_vertex 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProvokingVertex (GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROVOKINGVERTEXPROC) (GLenum mode);
+#endif
+
+#ifndef GL_ARB_seamless_cube_map
+#define GL_ARB_seamless_cube_map 1
+#endif
+
+#ifndef GL_ARB_sync
+#define GL_ARB_sync 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLsync APIENTRY glFenceSync (GLenum condition, GLbitfield flags);
+GLAPI GLboolean APIENTRY glIsSync (GLsync sync);
+GLAPI void APIENTRY glDeleteSync (GLsync sync);
+GLAPI GLenum APIENTRY glClientWaitSync (GLsync sync, GLbitfield flags, GLuint64 timeout);
+GLAPI void APIENTRY glWaitSync (GLsync sync, GLbitfield flags, GLuint64 timeout);
+GLAPI void APIENTRY glGetInteger64v (GLenum pname, GLint64 *params);
+GLAPI void APIENTRY glGetSynciv (GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLsync (APIENTRYP PFNGLFENCESYNCPROC) (GLenum condition, GLbitfield flags);
+typedef GLboolean (APIENTRYP PFNGLISSYNCPROC) (GLsync sync);
+typedef void (APIENTRYP PFNGLDELETESYNCPROC) (GLsync sync);
+typedef GLenum (APIENTRYP PFNGLCLIENTWAITSYNCPROC) (GLsync sync, GLbitfield flags, GLuint64 timeout);
+typedef void (APIENTRYP PFNGLWAITSYNCPROC) (GLsync sync, GLbitfield flags, GLuint64 timeout);
+typedef void (APIENTRYP PFNGLGETINTEGER64VPROC) (GLenum pname, GLint64 *params);
+typedef void (APIENTRYP PFNGLGETSYNCIVPROC) (GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
+#endif
+
+#ifndef GL_ARB_texture_multisample
+#define GL_ARB_texture_multisample 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTexImage2DMultisample (GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
+GLAPI void APIENTRY glTexImage3DMultisample (GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLboolean fixedsamplelocations);
+GLAPI void APIENTRY glGetMultisamplefv (GLenum pname, GLuint index, GLfloat *val);
+GLAPI void APIENTRY glSampleMaski (GLuint index, GLbitfield mask);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXIMAGE2DMULTISAMPLEPROC) (GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
+typedef void (APIENTRYP PFNGLTEXIMAGE3DMULTISAMPLEPROC) (GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLboolean fixedsamplelocations);
+typedef void (APIENTRYP PFNGLGETMULTISAMPLEFVPROC) (GLenum pname, GLuint index, GLfloat *val);
+typedef void (APIENTRYP PFNGLSAMPLEMASKIPROC) (GLuint index, GLbitfield mask);
+#endif
+
+#ifndef GL_ARB_vertex_array_bgra
+#define GL_ARB_vertex_array_bgra 1
+#endif
+
+#ifndef GL_ARB_draw_buffers_blend
+#define GL_ARB_draw_buffers_blend 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendEquationiARB (GLuint buf, GLenum mode);
+GLAPI void APIENTRY glBlendEquationSeparateiARB (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
+GLAPI void APIENTRY glBlendFunciARB (GLuint buf, GLenum src, GLenum dst);
+GLAPI void APIENTRY glBlendFuncSeparateiARB (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDEQUATIONIARBPROC) (GLuint buf, GLenum mode);
+typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEIARBPROC) (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
+typedef void (APIENTRYP PFNGLBLENDFUNCIARBPROC) (GLuint buf, GLenum src, GLenum dst);
+typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEIARBPROC) (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
+#endif
+
+#ifndef GL_ARB_sample_shading
+#define GL_ARB_sample_shading 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glMinSampleShadingARB (GLclampf value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLMINSAMPLESHADINGARBPROC) (GLclampf value);
+#endif
+
+#ifndef GL_ARB_texture_cube_map_array
+#define GL_ARB_texture_cube_map_array 1
+#endif
+
+#ifndef GL_ARB_texture_gather
+#define GL_ARB_texture_gather 1
+#endif
+
+#ifndef GL_ARB_texture_query_lod
+#define GL_ARB_texture_query_lod 1
+#endif
+
+#ifndef GL_ARB_shading_language_include
+#define GL_ARB_shading_language_include 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glNamedStringARB (GLenum type, GLint namelen, const GLchar *name, GLint stringlen, const GLchar *string);
+GLAPI void APIENTRY glDeleteNamedStringARB (GLint namelen, const GLchar *name);
+GLAPI void APIENTRY glCompileShaderIncludeARB (GLuint shader, GLsizei count, const GLchar* *path, const GLint *length);
+GLAPI GLboolean APIENTRY glIsNamedStringARB (GLint namelen, const GLchar *name);
+GLAPI void APIENTRY glGetNamedStringARB (GLint namelen, const GLchar *name, GLsizei bufSize, GLint *stringlen, GLchar *string);
+GLAPI void APIENTRY glGetNamedStringivARB (GLint namelen, const GLchar *name, GLenum pname, GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLNAMEDSTRINGARBPROC) (GLenum type, GLint namelen, const GLchar *name, GLint stringlen, const GLchar *string);
+typedef void (APIENTRYP PFNGLDELETENAMEDSTRINGARBPROC) (GLint namelen, const GLchar *name);
+typedef void (APIENTRYP PFNGLCOMPILESHADERINCLUDEARBPROC) (GLuint shader, GLsizei count, const GLchar* *path, const GLint *length);
+typedef GLboolean (APIENTRYP PFNGLISNAMEDSTRINGARBPROC) (GLint namelen, const GLchar *name);
+typedef void (APIENTRYP PFNGLGETNAMEDSTRINGARBPROC) (GLint namelen, const GLchar *name, GLsizei bufSize, GLint *stringlen, GLchar *string);
+typedef void (APIENTRYP PFNGLGETNAMEDSTRINGIVARBPROC) (GLint namelen, const GLchar *name, GLenum pname, GLint *params);
+#endif
+
+#ifndef GL_ARB_texture_compression_bptc
+#define GL_ARB_texture_compression_bptc 1
+#endif
+
+#ifndef GL_ARB_blend_func_extended
+#define GL_ARB_blend_func_extended 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBindFragDataLocationIndexed (GLuint program, GLuint colorNumber, GLuint index, const GLchar *name);
+GLAPI GLint APIENTRY glGetFragDataIndex (GLuint program, const GLchar *name);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBINDFRAGDATALOCATIONINDEXEDPROC) (GLuint program, GLuint colorNumber, GLuint index, const GLchar *name);
+typedef GLint (APIENTRYP PFNGLGETFRAGDATAINDEXPROC) (GLuint program, const GLchar *name);
+#endif
+
+#ifndef GL_ARB_explicit_attrib_location
+#define GL_ARB_explicit_attrib_location 1
+#endif
+
+#ifndef GL_ARB_occlusion_query2
+#define GL_ARB_occlusion_query2 1
+#endif
+
+#ifndef GL_ARB_sampler_objects
+#define GL_ARB_sampler_objects 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGenSamplers (GLsizei count, GLuint *samplers);
+GLAPI void APIENTRY glDeleteSamplers (GLsizei count, const GLuint *samplers);
+GLAPI GLboolean APIENTRY glIsSampler (GLuint sampler);
+GLAPI void APIENTRY glBindSampler (GLuint unit, GLuint sampler);
+GLAPI void APIENTRY glSamplerParameteri (GLuint sampler, GLenum pname, GLint param);
+GLAPI void APIENTRY glSamplerParameteriv (GLuint sampler, GLenum pname, const GLint *param);
+GLAPI void APIENTRY glSamplerParameterf (GLuint sampler, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glSamplerParameterfv (GLuint sampler, GLenum pname, const GLfloat *param);
+GLAPI void APIENTRY glSamplerParameterIiv (GLuint sampler, GLenum pname, const GLint *param);
+GLAPI void APIENTRY glSamplerParameterIuiv (GLuint sampler, GLenum pname, const GLuint *param);
+GLAPI void APIENTRY glGetSamplerParameteriv (GLuint sampler, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetSamplerParameterIiv (GLuint sampler, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetSamplerParameterfv (GLuint sampler, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetSamplerParameterIuiv (GLuint sampler, GLenum pname, GLuint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGENSAMPLERSPROC) (GLsizei count, GLuint *samplers);
+typedef void (APIENTRYP PFNGLDELETESAMPLERSPROC) (GLsizei count, const GLuint *samplers);
+typedef GLboolean (APIENTRYP PFNGLISSAMPLERPROC) (GLuint sampler);
+typedef void (APIENTRYP PFNGLBINDSAMPLERPROC) (GLuint unit, GLuint sampler);
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIPROC) (GLuint sampler, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIVPROC) (GLuint sampler, GLenum pname, const GLint *param);
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERFPROC) (GLuint sampler, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERFVPROC) (GLuint sampler, GLenum pname, const GLfloat *param);
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIIVPROC) (GLuint sampler, GLenum pname, const GLint *param);
+typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIUIVPROC) (GLuint sampler, GLenum pname, const GLuint *param);
+typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIVPROC) (GLuint sampler, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIIVPROC) (GLuint sampler, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERFVPROC) (GLuint sampler, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETSAMPLERPARAMETERIUIVPROC) (GLuint sampler, GLenum pname, GLuint *params);
+#endif
+
+#ifndef GL_ARB_texture_rgb10_a2ui
+#define GL_ARB_texture_rgb10_a2ui 1
+#endif
+
+#ifndef GL_ARB_texture_swizzle
+#define GL_ARB_texture_swizzle 1
+#endif
+
+#ifndef GL_ARB_timer_query
+#define GL_ARB_timer_query 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glQueryCounter (GLuint id, GLenum target);
+GLAPI void APIENTRY glGetQueryObjecti64v (GLuint id, GLenum pname, GLint64 *params);
+GLAPI void APIENTRY glGetQueryObjectui64v (GLuint id, GLenum pname, GLuint64 *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLQUERYCOUNTERPROC) (GLuint id, GLenum target);
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTI64VPROC) (GLuint id, GLenum pname, GLint64 *params);
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTUI64VPROC) (GLuint id, GLenum pname, GLuint64 *params);
+#endif
+
+#ifndef GL_ARB_vertex_type_2_10_10_10_rev
+#define GL_ARB_vertex_type_2_10_10_10_rev 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexP2ui (GLenum type, GLuint value);
+GLAPI void APIENTRY glVertexP2uiv (GLenum type, const GLuint *value);
+GLAPI void APIENTRY glVertexP3ui (GLenum type, GLuint value);
+GLAPI void APIENTRY glVertexP3uiv (GLenum type, const GLuint *value);
+GLAPI void APIENTRY glVertexP4ui (GLenum type, GLuint value);
+GLAPI void APIENTRY glVertexP4uiv (GLenum type, const GLuint *value);
+GLAPI void APIENTRY glTexCoordP1ui (GLenum type, GLuint coords);
+GLAPI void APIENTRY glTexCoordP1uiv (GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glTexCoordP2ui (GLenum type, GLuint coords);
+GLAPI void APIENTRY glTexCoordP2uiv (GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glTexCoordP3ui (GLenum type, GLuint coords);
+GLAPI void APIENTRY glTexCoordP3uiv (GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glTexCoordP4ui (GLenum type, GLuint coords);
+GLAPI void APIENTRY glTexCoordP4uiv (GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glMultiTexCoordP1ui (GLenum texture, GLenum type, GLuint coords);
+GLAPI void APIENTRY glMultiTexCoordP1uiv (GLenum texture, GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glMultiTexCoordP2ui (GLenum texture, GLenum type, GLuint coords);
+GLAPI void APIENTRY glMultiTexCoordP2uiv (GLenum texture, GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glMultiTexCoordP3ui (GLenum texture, GLenum type, GLuint coords);
+GLAPI void APIENTRY glMultiTexCoordP3uiv (GLenum texture, GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glMultiTexCoordP4ui (GLenum texture, GLenum type, GLuint coords);
+GLAPI void APIENTRY glMultiTexCoordP4uiv (GLenum texture, GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glNormalP3ui (GLenum type, GLuint coords);
+GLAPI void APIENTRY glNormalP3uiv (GLenum type, const GLuint *coords);
+GLAPI void APIENTRY glColorP3ui (GLenum type, GLuint color);
+GLAPI void APIENTRY glColorP3uiv (GLenum type, const GLuint *color);
+GLAPI void APIENTRY glColorP4ui (GLenum type, GLuint color);
+GLAPI void APIENTRY glColorP4uiv (GLenum type, const GLuint *color);
+GLAPI void APIENTRY glSecondaryColorP3ui (GLenum type, GLuint color);
+GLAPI void APIENTRY glSecondaryColorP3uiv (GLenum type, const GLuint *color);
+GLAPI void APIENTRY glVertexAttribP1ui (GLuint index, GLenum type, GLboolean normalized, GLuint value);
+GLAPI void APIENTRY glVertexAttribP1uiv (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+GLAPI void APIENTRY glVertexAttribP2ui (GLuint index, GLenum type, GLboolean normalized, GLuint value);
+GLAPI void APIENTRY glVertexAttribP2uiv (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+GLAPI void APIENTRY glVertexAttribP3ui (GLuint index, GLenum type, GLboolean normalized, GLuint value);
+GLAPI void APIENTRY glVertexAttribP3uiv (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+GLAPI void APIENTRY glVertexAttribP4ui (GLuint index, GLenum type, GLboolean normalized, GLuint value);
+GLAPI void APIENTRY glVertexAttribP4uiv (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXP2UIPROC) (GLenum type, GLuint value);
+typedef void (APIENTRYP PFNGLVERTEXP2UIVPROC) (GLenum type, const GLuint *value);
+typedef void (APIENTRYP PFNGLVERTEXP3UIPROC) (GLenum type, GLuint value);
+typedef void (APIENTRYP PFNGLVERTEXP3UIVPROC) (GLenum type, const GLuint *value);
+typedef void (APIENTRYP PFNGLVERTEXP4UIPROC) (GLenum type, GLuint value);
+typedef void (APIENTRYP PFNGLVERTEXP4UIVPROC) (GLenum type, const GLuint *value);
+typedef void (APIENTRYP PFNGLTEXCOORDP1UIPROC) (GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLTEXCOORDP1UIVPROC) (GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLTEXCOORDP2UIPROC) (GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLTEXCOORDP2UIVPROC) (GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLTEXCOORDP3UIPROC) (GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLTEXCOORDP3UIVPROC) (GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLTEXCOORDP4UIPROC) (GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLTEXCOORDP4UIVPROC) (GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP1UIPROC) (GLenum texture, GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP1UIVPROC) (GLenum texture, GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP2UIPROC) (GLenum texture, GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP2UIVPROC) (GLenum texture, GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP3UIPROC) (GLenum texture, GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP3UIVPROC) (GLenum texture, GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP4UIPROC) (GLenum texture, GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDP4UIVPROC) (GLenum texture, GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLNORMALP3UIPROC) (GLenum type, GLuint coords);
+typedef void (APIENTRYP PFNGLNORMALP3UIVPROC) (GLenum type, const GLuint *coords);
+typedef void (APIENTRYP PFNGLCOLORP3UIPROC) (GLenum type, GLuint color);
+typedef void (APIENTRYP PFNGLCOLORP3UIVPROC) (GLenum type, const GLuint *color);
+typedef void (APIENTRYP PFNGLCOLORP4UIPROC) (GLenum type, GLuint color);
+typedef void (APIENTRYP PFNGLCOLORP4UIVPROC) (GLenum type, const GLuint *color);
+typedef void (APIENTRYP PFNGLSECONDARYCOLORP3UIPROC) (GLenum type, GLuint color);
+typedef void (APIENTRYP PFNGLSECONDARYCOLORP3UIVPROC) (GLenum type, const GLuint *color);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP1UIPROC) (GLuint index, GLenum type, GLboolean normalized, GLuint value);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP1UIVPROC) (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP2UIPROC) (GLuint index, GLenum type, GLboolean normalized, GLuint value);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP2UIVPROC) (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP3UIPROC) (GLuint index, GLenum type, GLboolean normalized, GLuint value);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP3UIVPROC) (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP4UIPROC) (GLuint index, GLenum type, GLboolean normalized, GLuint value);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBP4UIVPROC) (GLuint index, GLenum type, GLboolean normalized, const GLuint *value);
+#endif
+
+#ifndef GL_ARB_draw_indirect
+#define GL_ARB_draw_indirect 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawArraysIndirect (GLenum mode, const GLvoid *indirect);
+GLAPI void APIENTRY glDrawElementsIndirect (GLenum mode, GLenum type, const GLvoid *indirect);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWARRAYSINDIRECTPROC) (GLenum mode, const GLvoid *indirect);
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINDIRECTPROC) (GLenum mode, GLenum type, const GLvoid *indirect);
+#endif
+
+#ifndef GL_ARB_gpu_shader5
+#define GL_ARB_gpu_shader5 1
+#endif
+
+#ifndef GL_ARB_gpu_shader_fp64
+#define GL_ARB_gpu_shader_fp64 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glUniform1d (GLint location, GLdouble x);
+GLAPI void APIENTRY glUniform2d (GLint location, GLdouble x, GLdouble y);
+GLAPI void APIENTRY glUniform3d (GLint location, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glUniform4d (GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glUniform1dv (GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glUniform2dv (GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glUniform3dv (GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glUniform4dv (GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix2dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix3dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix4dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix2x3dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix2x4dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix3x2dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix3x4dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix4x2dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glUniformMatrix4x3dv (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glGetUniformdv (GLuint program, GLint location, GLdouble *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLUNIFORM1DPROC) (GLint location, GLdouble x);
+typedef void (APIENTRYP PFNGLUNIFORM2DPROC) (GLint location, GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLUNIFORM3DPROC) (GLint location, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLUNIFORM4DPROC) (GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLUNIFORM1DVPROC) (GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORM2DVPROC) (GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORM3DVPROC) (GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORM4DVPROC) (GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X3DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX2X4DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X2DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX3X4DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X2DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLUNIFORMMATRIX4X3DVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLGETUNIFORMDVPROC) (GLuint program, GLint location, GLdouble *params);
+#endif
+
+#ifndef GL_ARB_shader_subroutine
+#define GL_ARB_shader_subroutine 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLint APIENTRY glGetSubroutineUniformLocation (GLuint program, GLenum shadertype, const GLchar *name);
+GLAPI GLuint APIENTRY glGetSubroutineIndex (GLuint program, GLenum shadertype, const GLchar *name);
+GLAPI void APIENTRY glGetActiveSubroutineUniformiv (GLuint program, GLenum shadertype, GLuint index, GLenum pname, GLint *values);
+GLAPI void APIENTRY glGetActiveSubroutineUniformName (GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
+GLAPI void APIENTRY glGetActiveSubroutineName (GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
+GLAPI void APIENTRY glUniformSubroutinesuiv (GLenum shadertype, GLsizei count, const GLuint *indices);
+GLAPI void APIENTRY glGetUniformSubroutineuiv (GLenum shadertype, GLint location, GLuint *params);
+GLAPI void APIENTRY glGetProgramStageiv (GLuint program, GLenum shadertype, GLenum pname, GLint *values);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLint (APIENTRYP PFNGLGETSUBROUTINEUNIFORMLOCATIONPROC) (GLuint program, GLenum shadertype, const GLchar *name);
+typedef GLuint (APIENTRYP PFNGLGETSUBROUTINEINDEXPROC) (GLuint program, GLenum shadertype, const GLchar *name);
+typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINEUNIFORMIVPROC) (GLuint program, GLenum shadertype, GLuint index, GLenum pname, GLint *values);
+typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINEUNIFORMNAMEPROC) (GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
+typedef void (APIENTRYP PFNGLGETACTIVESUBROUTINENAMEPROC) (GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
+typedef void (APIENTRYP PFNGLUNIFORMSUBROUTINESUIVPROC) (GLenum shadertype, GLsizei count, const GLuint *indices);
+typedef void (APIENTRYP PFNGLGETUNIFORMSUBROUTINEUIVPROC) (GLenum shadertype, GLint location, GLuint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMSTAGEIVPROC) (GLuint program, GLenum shadertype, GLenum pname, GLint *values);
+#endif
+
+#ifndef GL_ARB_tessellation_shader
+#define GL_ARB_tessellation_shader 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPatchParameteri (GLenum pname, GLint value);
+GLAPI void APIENTRY glPatchParameterfv (GLenum pname, const GLfloat *values);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPATCHPARAMETERIPROC) (GLenum pname, GLint value);
+typedef void (APIENTRYP PFNGLPATCHPARAMETERFVPROC) (GLenum pname, const GLfloat *values);
+#endif
+
+#ifndef GL_ARB_texture_buffer_object_rgb32
+#define GL_ARB_texture_buffer_object_rgb32 1
+#endif
+
+#ifndef GL_ARB_transform_feedback2
+#define GL_ARB_transform_feedback2 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBindTransformFeedback (GLenum target, GLuint id);
+GLAPI void APIENTRY glDeleteTransformFeedbacks (GLsizei n, const GLuint *ids);
+GLAPI void APIENTRY glGenTransformFeedbacks (GLsizei n, GLuint *ids);
+GLAPI GLboolean APIENTRY glIsTransformFeedback (GLuint id);
+GLAPI void APIENTRY glPauseTransformFeedback (void);
+GLAPI void APIENTRY glResumeTransformFeedback (void);
+GLAPI void APIENTRY glDrawTransformFeedback (GLenum mode, GLuint id);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBINDTRANSFORMFEEDBACKPROC) (GLenum target, GLuint id);
+typedef void (APIENTRYP PFNGLDELETETRANSFORMFEEDBACKSPROC) (GLsizei n, const GLuint *ids);
+typedef void (APIENTRYP PFNGLGENTRANSFORMFEEDBACKSPROC) (GLsizei n, GLuint *ids);
+typedef GLboolean (APIENTRYP PFNGLISTRANSFORMFEEDBACKPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLPAUSETRANSFORMFEEDBACKPROC) (void);
+typedef void (APIENTRYP PFNGLRESUMETRANSFORMFEEDBACKPROC) (void);
+typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKPROC) (GLenum mode, GLuint id);
+#endif
+
+#ifndef GL_ARB_transform_feedback3
+#define GL_ARB_transform_feedback3 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawTransformFeedbackStream (GLenum mode, GLuint id, GLuint stream);
+GLAPI void APIENTRY glBeginQueryIndexed (GLenum target, GLuint index, GLuint id);
+GLAPI void APIENTRY glEndQueryIndexed (GLenum target, GLuint index);
+GLAPI void APIENTRY glGetQueryIndexediv (GLenum target, GLuint index, GLenum pname, GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKSTREAMPROC) (GLenum mode, GLuint id, GLuint stream);
+typedef void (APIENTRYP PFNGLBEGINQUERYINDEXEDPROC) (GLenum target, GLuint index, GLuint id);
+typedef void (APIENTRYP PFNGLENDQUERYINDEXEDPROC) (GLenum target, GLuint index);
+typedef void (APIENTRYP PFNGLGETQUERYINDEXEDIVPROC) (GLenum target, GLuint index, GLenum pname, GLint *params);
+#endif
+
+#ifndef GL_ARB_ES2_compatibility
+#define GL_ARB_ES2_compatibility 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glReleaseShaderCompiler (void);
+GLAPI void APIENTRY glShaderBinary (GLsizei count, const GLuint *shaders, GLenum binaryformat, const GLvoid *binary, GLsizei length);
+GLAPI void APIENTRY glGetShaderPrecisionFormat (GLenum shadertype, GLenum precisiontype, GLint *range, GLint *precision);
+GLAPI void APIENTRY glDepthRangef (GLclampf n, GLclampf f);
+GLAPI void APIENTRY glClearDepthf (GLclampf d);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLRELEASESHADERCOMPILERPROC) (void);
+typedef void (APIENTRYP PFNGLSHADERBINARYPROC) (GLsizei count, const GLuint *shaders, GLenum binaryformat, const GLvoid *binary, GLsizei length);
+typedef void (APIENTRYP PFNGLGETSHADERPRECISIONFORMATPROC) (GLenum shadertype, GLenum precisiontype, GLint *range, GLint *precision);
+typedef void (APIENTRYP PFNGLDEPTHRANGEFPROC) (GLclampf n, GLclampf f);
+typedef void (APIENTRYP PFNGLCLEARDEPTHFPROC) (GLclampf d);
+#endif
+
+#ifndef GL_ARB_get_program_binary
+#define GL_ARB_get_program_binary 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetProgramBinary (GLuint program, GLsizei bufSize, GLsizei *length, GLenum *binaryFormat, GLvoid *binary);
+GLAPI void APIENTRY glProgramBinary (GLuint program, GLenum binaryFormat, const GLvoid *binary, GLsizei length);
+GLAPI void APIENTRY glProgramParameteri (GLuint program, GLenum pname, GLint value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETPROGRAMBINARYPROC) (GLuint program, GLsizei bufSize, GLsizei *length, GLenum *binaryFormat, GLvoid *binary);
+typedef void (APIENTRYP PFNGLPROGRAMBINARYPROC) (GLuint program, GLenum binaryFormat, const GLvoid *binary, GLsizei length);
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETERIPROC) (GLuint program, GLenum pname, GLint value);
+#endif
+
+#ifndef GL_ARB_separate_shader_objects
+#define GL_ARB_separate_shader_objects 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glUseProgramStages (GLuint pipeline, GLbitfield stages, GLuint program);
+GLAPI void APIENTRY glActiveShaderProgram (GLuint pipeline, GLuint program);
+GLAPI GLuint APIENTRY glCreateShaderProgramv (GLenum type, GLsizei count, const GLchar* *strings);
+GLAPI void APIENTRY glBindProgramPipeline (GLuint pipeline);
+GLAPI void APIENTRY glDeleteProgramPipelines (GLsizei n, const GLuint *pipelines);
+GLAPI void APIENTRY glGenProgramPipelines (GLsizei n, GLuint *pipelines);
+GLAPI GLboolean APIENTRY glIsProgramPipeline (GLuint pipeline);
+GLAPI void APIENTRY glGetProgramPipelineiv (GLuint pipeline, GLenum pname, GLint *params);
+GLAPI void APIENTRY glProgramUniform1i (GLuint program, GLint location, GLint v0);
+GLAPI void APIENTRY glProgramUniform1iv (GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glProgramUniform1f (GLuint program, GLint location, GLfloat v0);
+GLAPI void APIENTRY glProgramUniform1fv (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform1d (GLuint program, GLint location, GLdouble v0);
+GLAPI void APIENTRY glProgramUniform1dv (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniform1ui (GLuint program, GLint location, GLuint v0);
+GLAPI void APIENTRY glProgramUniform1uiv (GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glProgramUniform2i (GLuint program, GLint location, GLint v0, GLint v1);
+GLAPI void APIENTRY glProgramUniform2iv (GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glProgramUniform2f (GLuint program, GLint location, GLfloat v0, GLfloat v1);
+GLAPI void APIENTRY glProgramUniform2fv (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform2d (GLuint program, GLint location, GLdouble v0, GLdouble v1);
+GLAPI void APIENTRY glProgramUniform2dv (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniform2ui (GLuint program, GLint location, GLuint v0, GLuint v1);
+GLAPI void APIENTRY glProgramUniform2uiv (GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glProgramUniform3i (GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
+GLAPI void APIENTRY glProgramUniform3iv (GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glProgramUniform3f (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+GLAPI void APIENTRY glProgramUniform3fv (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform3d (GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2);
+GLAPI void APIENTRY glProgramUniform3dv (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniform3ui (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
+GLAPI void APIENTRY glProgramUniform3uiv (GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glProgramUniform4i (GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+GLAPI void APIENTRY glProgramUniform4iv (GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glProgramUniform4f (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+GLAPI void APIENTRY glProgramUniform4fv (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform4d (GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3);
+GLAPI void APIENTRY glProgramUniform4dv (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniform4ui (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+GLAPI void APIENTRY glProgramUniform4uiv (GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glProgramUniformMatrix2fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix3fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix4fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix2dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix3dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix4dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix2x3fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix3x2fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix2x4fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix4x2fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix3x4fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix4x3fv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix2x3dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix3x2dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix2x4dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix4x2dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix3x4dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix4x3dv (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glValidateProgramPipeline (GLuint pipeline);
+GLAPI void APIENTRY glGetProgramPipelineInfoLog (GLuint pipeline, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLUSEPROGRAMSTAGESPROC) (GLuint pipeline, GLbitfield stages, GLuint program);
+typedef void (APIENTRYP PFNGLACTIVESHADERPROGRAMPROC) (GLuint pipeline, GLuint program);
+typedef GLuint (APIENTRYP PFNGLCREATESHADERPROGRAMVPROC) (GLenum type, GLsizei count, const GLchar* *strings);
+typedef void (APIENTRYP PFNGLBINDPROGRAMPIPELINEPROC) (GLuint pipeline);
+typedef void (APIENTRYP PFNGLDELETEPROGRAMPIPELINESPROC) (GLsizei n, const GLuint *pipelines);
+typedef void (APIENTRYP PFNGLGENPROGRAMPIPELINESPROC) (GLsizei n, GLuint *pipelines);
+typedef GLboolean (APIENTRYP PFNGLISPROGRAMPIPELINEPROC) (GLuint pipeline);
+typedef void (APIENTRYP PFNGLGETPROGRAMPIPELINEIVPROC) (GLuint pipeline, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IPROC) (GLuint program, GLint location, GLint v0);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IVPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FPROC) (GLuint program, GLint location, GLfloat v0);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FVPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DPROC) (GLuint program, GLint location, GLdouble v0);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DVPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIPROC) (GLuint program, GLint location, GLuint v0);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIVPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IPROC) (GLuint program, GLint location, GLint v0, GLint v1);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IVPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FVPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DPROC) (GLuint program, GLint location, GLdouble v0, GLdouble v1);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DVPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIPROC) (GLuint program, GLint location, GLuint v0, GLuint v1);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIVPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IPROC) (GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IVPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FVPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DPROC) (GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DVPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIPROC) (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIVPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IPROC) (GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IVPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FVPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DPROC) (GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DVPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIPROC) (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIVPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3FVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3DVPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLVALIDATEPROGRAMPIPELINEPROC) (GLuint pipeline);
+typedef void (APIENTRYP PFNGLGETPROGRAMPIPELINEINFOLOGPROC) (GLuint pipeline, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
+#endif
+
+#ifndef GL_ARB_vertex_attrib_64bit
+#define GL_ARB_vertex_attrib_64bit 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexAttribL1d (GLuint index, GLdouble x);
+GLAPI void APIENTRY glVertexAttribL2d (GLuint index, GLdouble x, GLdouble y);
+GLAPI void APIENTRY glVertexAttribL3d (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glVertexAttribL4d (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glVertexAttribL1dv (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribL2dv (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribL3dv (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribL4dv (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribLPointer (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glGetVertexAttribLdv (GLuint index, GLenum pname, GLdouble *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DPROC) (GLuint index, GLdouble x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DPROC) (GLuint index, GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBLPOINTERPROC) (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLDVPROC) (GLuint index, GLenum pname, GLdouble *params);
+#endif
+
+#ifndef GL_ARB_viewport_array
+#define GL_ARB_viewport_array 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glViewportArrayv (GLuint first, GLsizei count, const GLfloat *v);
+GLAPI void APIENTRY glViewportIndexedf (GLuint index, GLfloat x, GLfloat y, GLfloat w, GLfloat h);
+GLAPI void APIENTRY glViewportIndexedfv (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glScissorArrayv (GLuint first, GLsizei count, const GLint *v);
+GLAPI void APIENTRY glScissorIndexed (GLuint index, GLint left, GLint bottom, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glScissorIndexedv (GLuint index, const GLint *v);
+GLAPI void APIENTRY glDepthRangeArrayv (GLuint first, GLsizei count, const GLclampd *v);
+GLAPI void APIENTRY glDepthRangeIndexed (GLuint index, GLclampd n, GLclampd f);
+GLAPI void APIENTRY glGetFloati_v (GLenum target, GLuint index, GLfloat *data);
+GLAPI void APIENTRY glGetDoublei_v (GLenum target, GLuint index, GLdouble *data);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVIEWPORTARRAYVPROC) (GLuint first, GLsizei count, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVIEWPORTINDEXEDFPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat w, GLfloat h);
+typedef void (APIENTRYP PFNGLVIEWPORTINDEXEDFVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLSCISSORARRAYVPROC) (GLuint first, GLsizei count, const GLint *v);
+typedef void (APIENTRYP PFNGLSCISSORINDEXEDPROC) (GLuint index, GLint left, GLint bottom, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLSCISSORINDEXEDVPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLDEPTHRANGEARRAYVPROC) (GLuint first, GLsizei count, const GLclampd *v);
+typedef void (APIENTRYP PFNGLDEPTHRANGEINDEXEDPROC) (GLuint index, GLclampd n, GLclampd f);
+typedef void (APIENTRYP PFNGLGETFLOATI_VPROC) (GLenum target, GLuint index, GLfloat *data);
+typedef void (APIENTRYP PFNGLGETDOUBLEI_VPROC) (GLenum target, GLuint index, GLdouble *data);
+#endif
+
+#ifndef GL_ARB_cl_event
+#define GL_ARB_cl_event 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLsync APIENTRY glCreateSyncFromCLeventARB (struct _cl_context * context, struct _cl_event * event, GLbitfield flags);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLsync (APIENTRYP PFNGLCREATESYNCFROMCLEVENTARBPROC) (struct _cl_context * context, struct _cl_event * event, GLbitfield flags);
+#endif
+
+#ifndef GL_ARB_debug_output
+#define GL_ARB_debug_output 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDebugMessageControlARB (GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
+GLAPI void APIENTRY glDebugMessageInsertARB (GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *buf);
+GLAPI void APIENTRY glDebugMessageCallbackARB (GLDEBUGPROCARB callback, const GLvoid *userParam);
+GLAPI GLuint APIENTRY glGetDebugMessageLogARB (GLuint count, GLsizei bufsize, GLenum *sources, GLenum *types, GLuint *ids, GLenum *severities, GLsizei *lengths, GLchar *messageLog);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDEBUGMESSAGECONTROLARBPROC) (GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
+typedef void (APIENTRYP PFNGLDEBUGMESSAGEINSERTARBPROC) (GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *buf);
+typedef void (APIENTRYP PFNGLDEBUGMESSAGECALLBACKARBPROC) (GLDEBUGPROCARB callback, const GLvoid *userParam);
+typedef GLuint (APIENTRYP PFNGLGETDEBUGMESSAGELOGARBPROC) (GLuint count, GLsizei bufsize, GLenum *sources, GLenum *types, GLuint *ids, GLenum *severities, GLsizei *lengths, GLchar *messageLog);
+#endif
+
+#ifndef GL_ARB_robustness
+#define GL_ARB_robustness 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLenum APIENTRY glGetGraphicsResetStatusARB (void);
+GLAPI void APIENTRY glGetnMapdvARB (GLenum target, GLenum query, GLsizei bufSize, GLdouble *v);
+GLAPI void APIENTRY glGetnMapfvARB (GLenum target, GLenum query, GLsizei bufSize, GLfloat *v);
+GLAPI void APIENTRY glGetnMapivARB (GLenum target, GLenum query, GLsizei bufSize, GLint *v);
+GLAPI void APIENTRY glGetnPixelMapfvARB (GLenum map, GLsizei bufSize, GLfloat *values);
+GLAPI void APIENTRY glGetnPixelMapuivARB (GLenum map, GLsizei bufSize, GLuint *values);
+GLAPI void APIENTRY glGetnPixelMapusvARB (GLenum map, GLsizei bufSize, GLushort *values);
+GLAPI void APIENTRY glGetnPolygonStippleARB (GLsizei bufSize, GLubyte *pattern);
+GLAPI void APIENTRY glGetnColorTableARB (GLenum target, GLenum format, GLenum type, GLsizei bufSize, GLvoid *table);
+GLAPI void APIENTRY glGetnConvolutionFilterARB (GLenum target, GLenum format, GLenum type, GLsizei bufSize, GLvoid *image);
+GLAPI void APIENTRY glGetnSeparableFilterARB (GLenum target, GLenum format, GLenum type, GLsizei rowBufSize, GLvoid *row, GLsizei columnBufSize, GLvoid *column, GLvoid *span);
+GLAPI void APIENTRY glGetnHistogramARB (GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, GLvoid *values);
+GLAPI void APIENTRY glGetnMinmaxARB (GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, GLvoid *values);
+GLAPI void APIENTRY glGetnTexImageARB (GLenum target, GLint level, GLenum format, GLenum type, GLsizei bufSize, GLvoid *img);
+GLAPI void APIENTRY glReadnPixelsARB (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei bufSize, GLvoid *data);
+GLAPI void APIENTRY glGetnCompressedTexImageARB (GLenum target, GLint lod, GLsizei bufSize, GLvoid *img);
+GLAPI void APIENTRY glGetnUniformfvARB (GLuint program, GLint location, GLsizei bufSize, GLfloat *params);
+GLAPI void APIENTRY glGetnUniformivARB (GLuint program, GLint location, GLsizei bufSize, GLint *params);
+GLAPI void APIENTRY glGetnUniformuivARB (GLuint program, GLint location, GLsizei bufSize, GLuint *params);
+GLAPI void APIENTRY glGetnUniformdvARB (GLuint program, GLint location, GLsizei bufSize, GLdouble *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLenum (APIENTRYP PFNGLGETGRAPHICSRESETSTATUSARBPROC) (void);
+typedef void (APIENTRYP PFNGLGETNMAPDVARBPROC) (GLenum target, GLenum query, GLsizei bufSize, GLdouble *v);
+typedef void (APIENTRYP PFNGLGETNMAPFVARBPROC) (GLenum target, GLenum query, GLsizei bufSize, GLfloat *v);
+typedef void (APIENTRYP PFNGLGETNMAPIVARBPROC) (GLenum target, GLenum query, GLsizei bufSize, GLint *v);
+typedef void (APIENTRYP PFNGLGETNPIXELMAPFVARBPROC) (GLenum map, GLsizei bufSize, GLfloat *values);
+typedef void (APIENTRYP PFNGLGETNPIXELMAPUIVARBPROC) (GLenum map, GLsizei bufSize, GLuint *values);
+typedef void (APIENTRYP PFNGLGETNPIXELMAPUSVARBPROC) (GLenum map, GLsizei bufSize, GLushort *values);
+typedef void (APIENTRYP PFNGLGETNPOLYGONSTIPPLEARBPROC) (GLsizei bufSize, GLubyte *pattern);
+typedef void (APIENTRYP PFNGLGETNCOLORTABLEARBPROC) (GLenum target, GLenum format, GLenum type, GLsizei bufSize, GLvoid *table);
+typedef void (APIENTRYP PFNGLGETNCONVOLUTIONFILTERARBPROC) (GLenum target, GLenum format, GLenum type, GLsizei bufSize, GLvoid *image);
+typedef void (APIENTRYP PFNGLGETNSEPARABLEFILTERARBPROC) (GLenum target, GLenum format, GLenum type, GLsizei rowBufSize, GLvoid *row, GLsizei columnBufSize, GLvoid *column, GLvoid *span);
+typedef void (APIENTRYP PFNGLGETNHISTOGRAMARBPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, GLvoid *values);
+typedef void (APIENTRYP PFNGLGETNMINMAXARBPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLsizei bufSize, GLvoid *values);
+typedef void (APIENTRYP PFNGLGETNTEXIMAGEARBPROC) (GLenum target, GLint level, GLenum format, GLenum type, GLsizei bufSize, GLvoid *img);
+typedef void (APIENTRYP PFNGLREADNPIXELSARBPROC) (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei bufSize, GLvoid *data);
+typedef void (APIENTRYP PFNGLGETNCOMPRESSEDTEXIMAGEARBPROC) (GLenum target, GLint lod, GLsizei bufSize, GLvoid *img);
+typedef void (APIENTRYP PFNGLGETNUNIFORMFVARBPROC) (GLuint program, GLint location, GLsizei bufSize, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETNUNIFORMIVARBPROC) (GLuint program, GLint location, GLsizei bufSize, GLint *params);
+typedef void (APIENTRYP PFNGLGETNUNIFORMUIVARBPROC) (GLuint program, GLint location, GLsizei bufSize, GLuint *params);
+typedef void (APIENTRYP PFNGLGETNUNIFORMDVARBPROC) (GLuint program, GLint location, GLsizei bufSize, GLdouble *params);
+#endif
+
+#ifndef GL_ARB_shader_stencil_export
+#define GL_ARB_shader_stencil_export 1
+#endif
+
+#ifndef GL_EXT_abgr
+#define GL_EXT_abgr 1
+#endif
+
+#ifndef GL_EXT_blend_color
+#define GL_EXT_blend_color 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendColorEXT (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDCOLOREXTPROC) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
+#endif
+
+#ifndef GL_EXT_polygon_offset
+#define GL_EXT_polygon_offset 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPolygonOffsetEXT (GLfloat factor, GLfloat bias);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPOLYGONOFFSETEXTPROC) (GLfloat factor, GLfloat bias);
+#endif
+
+#ifndef GL_EXT_texture
+#define GL_EXT_texture 1
+#endif
+
+#ifndef GL_EXT_texture3D
+#define GL_EXT_texture3D 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTexImage3DEXT (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glTexSubImage3DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXIMAGE3DEXTPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLTEXSUBIMAGE3DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+#endif
+
+#ifndef GL_SGIS_texture_filter4
+#define GL_SGIS_texture_filter4 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetTexFilterFuncSGIS (GLenum target, GLenum filter, GLfloat *weights);
+GLAPI void APIENTRY glTexFilterFuncSGIS (GLenum target, GLenum filter, GLsizei n, const GLfloat *weights);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETTEXFILTERFUNCSGISPROC) (GLenum target, GLenum filter, GLfloat *weights);
+typedef void (APIENTRYP PFNGLTEXFILTERFUNCSGISPROC) (GLenum target, GLenum filter, GLsizei n, const GLfloat *weights);
+#endif
+
+#ifndef GL_EXT_subtexture
+#define GL_EXT_subtexture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTexSubImage1DEXT (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glTexSubImage2DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXSUBIMAGE1DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLTEXSUBIMAGE2DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
+#endif
+
+#ifndef GL_EXT_copy_texture
+#define GL_EXT_copy_texture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glCopyTexImage1DEXT (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
+GLAPI void APIENTRY glCopyTexImage2DEXT (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
+GLAPI void APIENTRY glCopyTexSubImage1DEXT (GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+GLAPI void APIENTRY glCopyTexSubImage2DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glCopyTexSubImage3DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOPYTEXIMAGE1DEXTPROC) (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
+typedef void (APIENTRYP PFNGLCOPYTEXIMAGE2DEXTPROC) (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
+typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE1DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE2DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLCOPYTEXSUBIMAGE3DEXTPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+#endif
+
+#ifndef GL_EXT_histogram
+#define GL_EXT_histogram 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetHistogramEXT (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
+GLAPI void APIENTRY glGetHistogramParameterfvEXT (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetHistogramParameterivEXT (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetMinmaxEXT (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
+GLAPI void APIENTRY glGetMinmaxParameterfvEXT (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetMinmaxParameterivEXT (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glHistogramEXT (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
+GLAPI void APIENTRY glMinmaxEXT (GLenum target, GLenum internalformat, GLboolean sink);
+GLAPI void APIENTRY glResetHistogramEXT (GLenum target);
+GLAPI void APIENTRY glResetMinmaxEXT (GLenum target);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETHISTOGRAMEXTPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
+typedef void (APIENTRYP PFNGLGETHISTOGRAMPARAMETERFVEXTPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETHISTOGRAMPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETMINMAXEXTPROC) (GLenum target, GLboolean reset, GLenum format, GLenum type, GLvoid *values);
+typedef void (APIENTRYP PFNGLGETMINMAXPARAMETERFVEXTPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETMINMAXPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLHISTOGRAMEXTPROC) (GLenum target, GLsizei width, GLenum internalformat, GLboolean sink);
+typedef void (APIENTRYP PFNGLMINMAXEXTPROC) (GLenum target, GLenum internalformat, GLboolean sink);
+typedef void (APIENTRYP PFNGLRESETHISTOGRAMEXTPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLRESETMINMAXEXTPROC) (GLenum target);
+#endif
+
+#ifndef GL_EXT_convolution
+#define GL_EXT_convolution 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glConvolutionFilter1DEXT (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
+GLAPI void APIENTRY glConvolutionFilter2DEXT (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
+GLAPI void APIENTRY glConvolutionParameterfEXT (GLenum target, GLenum pname, GLfloat params);
+GLAPI void APIENTRY glConvolutionParameterfvEXT (GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glConvolutionParameteriEXT (GLenum target, GLenum pname, GLint params);
+GLAPI void APIENTRY glConvolutionParameterivEXT (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glCopyConvolutionFilter1DEXT (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
+GLAPI void APIENTRY glCopyConvolutionFilter2DEXT (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glGetConvolutionFilterEXT (GLenum target, GLenum format, GLenum type, GLvoid *image);
+GLAPI void APIENTRY glGetConvolutionParameterfvEXT (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetConvolutionParameterivEXT (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetSeparableFilterEXT (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
+GLAPI void APIENTRY glSeparableFilter2DEXT (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCONVOLUTIONFILTER1DEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *image);
+typedef void (APIENTRYP PFNGLCONVOLUTIONFILTER2DEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image);
+typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERFEXTPROC) (GLenum target, GLenum pname, GLfloat params);
+typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERFVEXTPROC) (GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERIEXTPROC) (GLenum target, GLenum pname, GLint params);
+typedef void (APIENTRYP PFNGLCONVOLUTIONPARAMETERIVEXTPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLCOPYCONVOLUTIONFILTER1DEXTPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
+typedef void (APIENTRYP PFNGLCOPYCONVOLUTIONFILTER2DEXTPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLGETCONVOLUTIONFILTEREXTPROC) (GLenum target, GLenum format, GLenum type, GLvoid *image);
+typedef void (APIENTRYP PFNGLGETCONVOLUTIONPARAMETERFVEXTPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETCONVOLUTIONPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETSEPARABLEFILTEREXTPROC) (GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span);
+typedef void (APIENTRYP PFNGLSEPARABLEFILTER2DEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column);
+#endif
+
+#ifndef GL_SGI_color_matrix
+#define GL_SGI_color_matrix 1
+#endif
+
+#ifndef GL_SGI_color_table
+#define GL_SGI_color_table 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glColorTableSGI (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
+GLAPI void APIENTRY glColorTableParameterfvSGI (GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glColorTableParameterivSGI (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glCopyColorTableSGI (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
+GLAPI void APIENTRY glGetColorTableSGI (GLenum target, GLenum format, GLenum type, GLvoid *table);
+GLAPI void APIENTRY glGetColorTableParameterfvSGI (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetColorTableParameterivSGI (GLenum target, GLenum pname, GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOLORTABLESGIPROC) (GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
+typedef void (APIENTRYP PFNGLCOLORTABLEPARAMETERFVSGIPROC) (GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLCOLORTABLEPARAMETERIVSGIPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLCOPYCOLORTABLESGIPROC) (GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width);
+typedef void (APIENTRYP PFNGLGETCOLORTABLESGIPROC) (GLenum target, GLenum format, GLenum type, GLvoid *table);
+typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERFVSGIPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERIVSGIPROC) (GLenum target, GLenum pname, GLint *params);
+#endif
+
+#ifndef GL_SGIX_pixel_texture
+#define GL_SGIX_pixel_texture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPixelTexGenSGIX (GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPIXELTEXGENSGIXPROC) (GLenum mode);
+#endif
+
+#ifndef GL_SGIS_pixel_texture
+#define GL_SGIS_pixel_texture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPixelTexGenParameteriSGIS (GLenum pname, GLint param);
+GLAPI void APIENTRY glPixelTexGenParameterivSGIS (GLenum pname, const GLint *params);
+GLAPI void APIENTRY glPixelTexGenParameterfSGIS (GLenum pname, GLfloat param);
+GLAPI void APIENTRY glPixelTexGenParameterfvSGIS (GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glGetPixelTexGenParameterivSGIS (GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetPixelTexGenParameterfvSGIS (GLenum pname, GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPIXELTEXGENPARAMETERISGISPROC) (GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLPIXELTEXGENPARAMETERIVSGISPROC) (GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLPIXELTEXGENPARAMETERFSGISPROC) (GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLPIXELTEXGENPARAMETERFVSGISPROC) (GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLGETPIXELTEXGENPARAMETERIVSGISPROC) (GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETPIXELTEXGENPARAMETERFVSGISPROC) (GLenum pname, GLfloat *params);
+#endif
+
+#ifndef GL_SGIS_texture4D
+#define GL_SGIS_texture4D 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTexImage4DSGIS (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLsizei size4d, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glTexSubImage4DSGIS (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint woffset, GLsizei width, GLsizei height, GLsizei depth, GLsizei size4d, GLenum format, GLenum type, const GLvoid *pixels);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXIMAGE4DSGISPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLsizei size4d, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLTEXSUBIMAGE4DSGISPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint woffset, GLsizei width, GLsizei height, GLsizei depth, GLsizei size4d, GLenum format, GLenum type, const GLvoid *pixels);
+#endif
+
+#ifndef GL_SGI_texture_color_table
+#define GL_SGI_texture_color_table 1
+#endif
+
+#ifndef GL_EXT_cmyka
+#define GL_EXT_cmyka 1
+#endif
+
+#ifndef GL_EXT_texture_object
+#define GL_EXT_texture_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLboolean APIENTRY glAreTexturesResidentEXT (GLsizei n, const GLuint *textures, GLboolean *residences);
+GLAPI void APIENTRY glBindTextureEXT (GLenum target, GLuint texture);
+GLAPI void APIENTRY glDeleteTexturesEXT (GLsizei n, const GLuint *textures);
+GLAPI void APIENTRY glGenTexturesEXT (GLsizei n, GLuint *textures);
+GLAPI GLboolean APIENTRY glIsTextureEXT (GLuint texture);
+GLAPI void APIENTRY glPrioritizeTexturesEXT (GLsizei n, const GLuint *textures, const GLclampf *priorities);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLboolean (APIENTRYP PFNGLARETEXTURESRESIDENTEXTPROC) (GLsizei n, const GLuint *textures, GLboolean *residences);
+typedef void (APIENTRYP PFNGLBINDTEXTUREEXTPROC) (GLenum target, GLuint texture);
+typedef void (APIENTRYP PFNGLDELETETEXTURESEXTPROC) (GLsizei n, const GLuint *textures);
+typedef void (APIENTRYP PFNGLGENTEXTURESEXTPROC) (GLsizei n, GLuint *textures);
+typedef GLboolean (APIENTRYP PFNGLISTEXTUREEXTPROC) (GLuint texture);
+typedef void (APIENTRYP PFNGLPRIORITIZETEXTURESEXTPROC) (GLsizei n, const GLuint *textures, const GLclampf *priorities);
+#endif
+
+#ifndef GL_SGIS_detail_texture
+#define GL_SGIS_detail_texture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDetailTexFuncSGIS (GLenum target, GLsizei n, const GLfloat *points);
+GLAPI void APIENTRY glGetDetailTexFuncSGIS (GLenum target, GLfloat *points);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDETAILTEXFUNCSGISPROC) (GLenum target, GLsizei n, const GLfloat *points);
+typedef void (APIENTRYP PFNGLGETDETAILTEXFUNCSGISPROC) (GLenum target, GLfloat *points);
+#endif
+
+#ifndef GL_SGIS_sharpen_texture
+#define GL_SGIS_sharpen_texture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glSharpenTexFuncSGIS (GLenum target, GLsizei n, const GLfloat *points);
+GLAPI void APIENTRY glGetSharpenTexFuncSGIS (GLenum target, GLfloat *points);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSHARPENTEXFUNCSGISPROC) (GLenum target, GLsizei n, const GLfloat *points);
+typedef void (APIENTRYP PFNGLGETSHARPENTEXFUNCSGISPROC) (GLenum target, GLfloat *points);
+#endif
+
+#ifndef GL_EXT_packed_pixels
+#define GL_EXT_packed_pixels 1
+#endif
+
+#ifndef GL_SGIS_texture_lod
+#define GL_SGIS_texture_lod 1
+#endif
+
+#ifndef GL_SGIS_multisample
+#define GL_SGIS_multisample 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glSampleMaskSGIS (GLclampf value, GLboolean invert);
+GLAPI void APIENTRY glSamplePatternSGIS (GLenum pattern);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSAMPLEMASKSGISPROC) (GLclampf value, GLboolean invert);
+typedef void (APIENTRYP PFNGLSAMPLEPATTERNSGISPROC) (GLenum pattern);
+#endif
+
+#ifndef GL_EXT_rescale_normal
+#define GL_EXT_rescale_normal 1
+#endif
+
+#ifndef GL_EXT_vertex_array
+#define GL_EXT_vertex_array 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glArrayElementEXT (GLint i);
+GLAPI void APIENTRY glColorPointerEXT (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+GLAPI void APIENTRY glDrawArraysEXT (GLenum mode, GLint first, GLsizei count);
+GLAPI void APIENTRY glEdgeFlagPointerEXT (GLsizei stride, GLsizei count, const GLboolean *pointer);
+GLAPI void APIENTRY glGetPointervEXT (GLenum pname, GLvoid* *params);
+GLAPI void APIENTRY glIndexPointerEXT (GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+GLAPI void APIENTRY glNormalPointerEXT (GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+GLAPI void APIENTRY glTexCoordPointerEXT (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+GLAPI void APIENTRY glVertexPointerEXT (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLARRAYELEMENTEXTPROC) (GLint i);
+typedef void (APIENTRYP PFNGLCOLORPOINTEREXTPROC) (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLDRAWARRAYSEXTPROC) (GLenum mode, GLint first, GLsizei count);
+typedef void (APIENTRYP PFNGLEDGEFLAGPOINTEREXTPROC) (GLsizei stride, GLsizei count, const GLboolean *pointer);
+typedef void (APIENTRYP PFNGLGETPOINTERVEXTPROC) (GLenum pname, GLvoid* *params);
+typedef void (APIENTRYP PFNGLINDEXPOINTEREXTPROC) (GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLNORMALPOINTEREXTPROC) (GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLTEXCOORDPOINTEREXTPROC) (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLVERTEXPOINTEREXTPROC) (GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer);
+#endif
+
+#ifndef GL_EXT_misc_attribute
+#define GL_EXT_misc_attribute 1
+#endif
+
+#ifndef GL_SGIS_generate_mipmap
+#define GL_SGIS_generate_mipmap 1
+#endif
+
+#ifndef GL_SGIX_clipmap
+#define GL_SGIX_clipmap 1
+#endif
+
+#ifndef GL_SGIX_shadow
+#define GL_SGIX_shadow 1
+#endif
+
+#ifndef GL_SGIS_texture_edge_clamp
+#define GL_SGIS_texture_edge_clamp 1
+#endif
+
+#ifndef GL_SGIS_texture_border_clamp
+#define GL_SGIS_texture_border_clamp 1
+#endif
+
+#ifndef GL_EXT_blend_minmax
+#define GL_EXT_blend_minmax 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendEquationEXT (GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDEQUATIONEXTPROC) (GLenum mode);
+#endif
+
+#ifndef GL_EXT_blend_subtract
+#define GL_EXT_blend_subtract 1
+#endif
+
+#ifndef GL_EXT_blend_logic_op
+#define GL_EXT_blend_logic_op 1
+#endif
+
+#ifndef GL_SGIX_interlace
+#define GL_SGIX_interlace 1
+#endif
+
+#ifndef GL_SGIX_pixel_tiles
+#define GL_SGIX_pixel_tiles 1
+#endif
+
+#ifndef GL_SGIX_texture_select
+#define GL_SGIX_texture_select 1
+#endif
+
+#ifndef GL_SGIX_sprite
+#define GL_SGIX_sprite 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glSpriteParameterfSGIX (GLenum pname, GLfloat param);
+GLAPI void APIENTRY glSpriteParameterfvSGIX (GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glSpriteParameteriSGIX (GLenum pname, GLint param);
+GLAPI void APIENTRY glSpriteParameterivSGIX (GLenum pname, const GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSPRITEPARAMETERFSGIXPROC) (GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLSPRITEPARAMETERFVSGIXPROC) (GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLSPRITEPARAMETERISGIXPROC) (GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLSPRITEPARAMETERIVSGIXPROC) (GLenum pname, const GLint *params);
+#endif
+
+#ifndef GL_SGIX_texture_multi_buffer
+#define GL_SGIX_texture_multi_buffer 1
+#endif
+
+#ifndef GL_EXT_point_parameters
+#define GL_EXT_point_parameters 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPointParameterfEXT (GLenum pname, GLfloat param);
+GLAPI void APIENTRY glPointParameterfvEXT (GLenum pname, const GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFEXTPROC) (GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFVEXTPROC) (GLenum pname, const GLfloat *params);
+#endif
+
+#ifndef GL_SGIS_point_parameters
+#define GL_SGIS_point_parameters 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPointParameterfSGIS (GLenum pname, GLfloat param);
+GLAPI void APIENTRY glPointParameterfvSGIS (GLenum pname, const GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFSGISPROC) (GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLPOINTPARAMETERFVSGISPROC) (GLenum pname, const GLfloat *params);
+#endif
+
+#ifndef GL_SGIX_instruments
+#define GL_SGIX_instruments 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLint APIENTRY glGetInstrumentsSGIX (void);
+GLAPI void APIENTRY glInstrumentsBufferSGIX (GLsizei size, GLint *buffer);
+GLAPI GLint APIENTRY glPollInstrumentsSGIX (GLint *marker_p);
+GLAPI void APIENTRY glReadInstrumentsSGIX (GLint marker);
+GLAPI void APIENTRY glStartInstrumentsSGIX (void);
+GLAPI void APIENTRY glStopInstrumentsSGIX (GLint marker);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLint (APIENTRYP PFNGLGETINSTRUMENTSSGIXPROC) (void);
+typedef void (APIENTRYP PFNGLINSTRUMENTSBUFFERSGIXPROC) (GLsizei size, GLint *buffer);
+typedef GLint (APIENTRYP PFNGLPOLLINSTRUMENTSSGIXPROC) (GLint *marker_p);
+typedef void (APIENTRYP PFNGLREADINSTRUMENTSSGIXPROC) (GLint marker);
+typedef void (APIENTRYP PFNGLSTARTINSTRUMENTSSGIXPROC) (void);
+typedef void (APIENTRYP PFNGLSTOPINSTRUMENTSSGIXPROC) (GLint marker);
+#endif
+
+#ifndef GL_SGIX_texture_scale_bias
+#define GL_SGIX_texture_scale_bias 1
+#endif
+
+#ifndef GL_SGIX_framezoom
+#define GL_SGIX_framezoom 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFrameZoomSGIX (GLint factor);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFRAMEZOOMSGIXPROC) (GLint factor);
+#endif
+
+#ifndef GL_SGIX_tag_sample_buffer
+#define GL_SGIX_tag_sample_buffer 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTagSampleBufferSGIX (void);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTAGSAMPLEBUFFERSGIXPROC) (void);
+#endif
+
+#ifndef GL_SGIX_polynomial_ffd
+#define GL_SGIX_polynomial_ffd 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDeformationMap3dSGIX (GLenum target, GLdouble u1, GLdouble u2, GLint ustride, GLint uorder, GLdouble v1, GLdouble v2, GLint vstride, GLint vorder, GLdouble w1, GLdouble w2, GLint wstride, GLint worder, const GLdouble *points);
+GLAPI void APIENTRY glDeformationMap3fSGIX (GLenum target, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder, GLfloat v1, GLfloat v2, GLint vstride, GLint vorder, GLfloat w1, GLfloat w2, GLint wstride, GLint worder, const GLfloat *points);
+GLAPI void APIENTRY glDeformSGIX (GLbitfield mask);
+GLAPI void APIENTRY glLoadIdentityDeformationMapSGIX (GLbitfield mask);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDEFORMATIONMAP3DSGIXPROC) (GLenum target, GLdouble u1, GLdouble u2, GLint ustride, GLint uorder, GLdouble v1, GLdouble v2, GLint vstride, GLint vorder, GLdouble w1, GLdouble w2, GLint wstride, GLint worder, const GLdouble *points);
+typedef void (APIENTRYP PFNGLDEFORMATIONMAP3FSGIXPROC) (GLenum target, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder, GLfloat v1, GLfloat v2, GLint vstride, GLint vorder, GLfloat w1, GLfloat w2, GLint wstride, GLint worder, const GLfloat *points);
+typedef void (APIENTRYP PFNGLDEFORMSGIXPROC) (GLbitfield mask);
+typedef void (APIENTRYP PFNGLLOADIDENTITYDEFORMATIONMAPSGIXPROC) (GLbitfield mask);
+#endif
+
+#ifndef GL_SGIX_reference_plane
+#define GL_SGIX_reference_plane 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glReferencePlaneSGIX (const GLdouble *equation);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLREFERENCEPLANESGIXPROC) (const GLdouble *equation);
+#endif
+
+#ifndef GL_SGIX_flush_raster
+#define GL_SGIX_flush_raster 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFlushRasterSGIX (void);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFLUSHRASTERSGIXPROC) (void);
+#endif
+
+#ifndef GL_SGIX_depth_texture
+#define GL_SGIX_depth_texture 1
+#endif
+
+#ifndef GL_SGIS_fog_function
+#define GL_SGIS_fog_function 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFogFuncSGIS (GLsizei n, const GLfloat *points);
+GLAPI void APIENTRY glGetFogFuncSGIS (GLfloat *points);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFOGFUNCSGISPROC) (GLsizei n, const GLfloat *points);
+typedef void (APIENTRYP PFNGLGETFOGFUNCSGISPROC) (GLfloat *points);
+#endif
+
+#ifndef GL_SGIX_fog_offset
+#define GL_SGIX_fog_offset 1
+#endif
+
+#ifndef GL_HP_image_transform
+#define GL_HP_image_transform 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glImageTransformParameteriHP (GLenum target, GLenum pname, GLint param);
+GLAPI void APIENTRY glImageTransformParameterfHP (GLenum target, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glImageTransformParameterivHP (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glImageTransformParameterfvHP (GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glGetImageTransformParameterivHP (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetImageTransformParameterfvHP (GLenum target, GLenum pname, GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLIMAGETRANSFORMPARAMETERIHPPROC) (GLenum target, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLIMAGETRANSFORMPARAMETERFHPPROC) (GLenum target, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLIMAGETRANSFORMPARAMETERIVHPPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLIMAGETRANSFORMPARAMETERFVHPPROC) (GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLGETIMAGETRANSFORMPARAMETERIVHPPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETIMAGETRANSFORMPARAMETERFVHPPROC) (GLenum target, GLenum pname, GLfloat *params);
+#endif
+
+#ifndef GL_HP_convolution_border_modes
+#define GL_HP_convolution_border_modes 1
+#endif
+
+#ifndef GL_SGIX_texture_add_env
+#define GL_SGIX_texture_add_env 1
+#endif
+
+#ifndef GL_EXT_color_subtable
+#define GL_EXT_color_subtable 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glColorSubTableEXT (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
+GLAPI void APIENTRY glCopyColorSubTableEXT (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOLORSUBTABLEEXTPROC) (GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *data);
+typedef void (APIENTRYP PFNGLCOPYCOLORSUBTABLEEXTPROC) (GLenum target, GLsizei start, GLint x, GLint y, GLsizei width);
+#endif
+
+#ifndef GL_PGI_vertex_hints
+#define GL_PGI_vertex_hints 1
+#endif
+
+#ifndef GL_PGI_misc_hints
+#define GL_PGI_misc_hints 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glHintPGI (GLenum target, GLint mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLHINTPGIPROC) (GLenum target, GLint mode);
+#endif
+
+#ifndef GL_EXT_paletted_texture
+#define GL_EXT_paletted_texture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glColorTableEXT (GLenum target, GLenum internalFormat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
+GLAPI void APIENTRY glGetColorTableEXT (GLenum target, GLenum format, GLenum type, GLvoid *data);
+GLAPI void APIENTRY glGetColorTableParameterivEXT (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetColorTableParameterfvEXT (GLenum target, GLenum pname, GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOLORTABLEEXTPROC) (GLenum target, GLenum internalFormat, GLsizei width, GLenum format, GLenum type, const GLvoid *table);
+typedef void (APIENTRYP PFNGLGETCOLORTABLEEXTPROC) (GLenum target, GLenum format, GLenum type, GLvoid *data);
+typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETCOLORTABLEPARAMETERFVEXTPROC) (GLenum target, GLenum pname, GLfloat *params);
+#endif
+
+#ifndef GL_EXT_clip_volume_hint
+#define GL_EXT_clip_volume_hint 1
+#endif
+
+#ifndef GL_SGIX_list_priority
+#define GL_SGIX_list_priority 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetListParameterfvSGIX (GLuint list, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetListParameterivSGIX (GLuint list, GLenum pname, GLint *params);
+GLAPI void APIENTRY glListParameterfSGIX (GLuint list, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glListParameterfvSGIX (GLuint list, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glListParameteriSGIX (GLuint list, GLenum pname, GLint param);
+GLAPI void APIENTRY glListParameterivSGIX (GLuint list, GLenum pname, const GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETLISTPARAMETERFVSGIXPROC) (GLuint list, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETLISTPARAMETERIVSGIXPROC) (GLuint list, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLLISTPARAMETERFSGIXPROC) (GLuint list, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLLISTPARAMETERFVSGIXPROC) (GLuint list, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLLISTPARAMETERISGIXPROC) (GLuint list, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLLISTPARAMETERIVSGIXPROC) (GLuint list, GLenum pname, const GLint *params);
+#endif
+
+#ifndef GL_SGIX_ir_instrument1
+#define GL_SGIX_ir_instrument1 1
+#endif
+
+#ifndef GL_SGIX_calligraphic_fragment
+#define GL_SGIX_calligraphic_fragment 1
+#endif
+
+#ifndef GL_SGIX_texture_lod_bias
+#define GL_SGIX_texture_lod_bias 1
+#endif
+
+#ifndef GL_SGIX_shadow_ambient
+#define GL_SGIX_shadow_ambient 1
+#endif
+
+#ifndef GL_EXT_index_texture
+#define GL_EXT_index_texture 1
+#endif
+
+#ifndef GL_EXT_index_material
+#define GL_EXT_index_material 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glIndexMaterialEXT (GLenum face, GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLINDEXMATERIALEXTPROC) (GLenum face, GLenum mode);
+#endif
+
+#ifndef GL_EXT_index_func
+#define GL_EXT_index_func 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glIndexFuncEXT (GLenum func, GLclampf ref);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLINDEXFUNCEXTPROC) (GLenum func, GLclampf ref);
+#endif
+
+#ifndef GL_EXT_index_array_formats
+#define GL_EXT_index_array_formats 1
+#endif
+
+#ifndef GL_EXT_compiled_vertex_array
+#define GL_EXT_compiled_vertex_array 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glLockArraysEXT (GLint first, GLsizei count);
+GLAPI void APIENTRY glUnlockArraysEXT (void);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLLOCKARRAYSEXTPROC) (GLint first, GLsizei count);
+typedef void (APIENTRYP PFNGLUNLOCKARRAYSEXTPROC) (void);
+#endif
+
+#ifndef GL_EXT_cull_vertex
+#define GL_EXT_cull_vertex 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glCullParameterdvEXT (GLenum pname, GLdouble *params);
+GLAPI void APIENTRY glCullParameterfvEXT (GLenum pname, GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCULLPARAMETERDVEXTPROC) (GLenum pname, GLdouble *params);
+typedef void (APIENTRYP PFNGLCULLPARAMETERFVEXTPROC) (GLenum pname, GLfloat *params);
+#endif
+
+#ifndef GL_SGIX_ycrcb
+#define GL_SGIX_ycrcb 1
+#endif
+
+#ifndef GL_SGIX_fragment_lighting
+#define GL_SGIX_fragment_lighting 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFragmentColorMaterialSGIX (GLenum face, GLenum mode);
+GLAPI void APIENTRY glFragmentLightfSGIX (GLenum light, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glFragmentLightfvSGIX (GLenum light, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glFragmentLightiSGIX (GLenum light, GLenum pname, GLint param);
+GLAPI void APIENTRY glFragmentLightivSGIX (GLenum light, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glFragmentLightModelfSGIX (GLenum pname, GLfloat param);
+GLAPI void APIENTRY glFragmentLightModelfvSGIX (GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glFragmentLightModeliSGIX (GLenum pname, GLint param);
+GLAPI void APIENTRY glFragmentLightModelivSGIX (GLenum pname, const GLint *params);
+GLAPI void APIENTRY glFragmentMaterialfSGIX (GLenum face, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glFragmentMaterialfvSGIX (GLenum face, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glFragmentMaterialiSGIX (GLenum face, GLenum pname, GLint param);
+GLAPI void APIENTRY glFragmentMaterialivSGIX (GLenum face, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glGetFragmentLightfvSGIX (GLenum light, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetFragmentLightivSGIX (GLenum light, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetFragmentMaterialfvSGIX (GLenum face, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetFragmentMaterialivSGIX (GLenum face, GLenum pname, GLint *params);
+GLAPI void APIENTRY glLightEnviSGIX (GLenum pname, GLint param);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFRAGMENTCOLORMATERIALSGIXPROC) (GLenum face, GLenum mode);
+typedef void (APIENTRYP PFNGLFRAGMENTLIGHTFSGIXPROC) (GLenum light, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLFRAGMENTLIGHTFVSGIXPROC) (GLenum light, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLFRAGMENTLIGHTISGIXPROC) (GLenum light, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLFRAGMENTLIGHTIVSGIXPROC) (GLenum light, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLFRAGMENTLIGHTMODELFSGIXPROC) (GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLFRAGMENTLIGHTMODELFVSGIXPROC) (GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLFRAGMENTLIGHTMODELISGIXPROC) (GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLFRAGMENTLIGHTMODELIVSGIXPROC) (GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLFRAGMENTMATERIALFSGIXPROC) (GLenum face, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLFRAGMENTMATERIALFVSGIXPROC) (GLenum face, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLFRAGMENTMATERIALISGIXPROC) (GLenum face, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLFRAGMENTMATERIALIVSGIXPROC) (GLenum face, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLGETFRAGMENTLIGHTFVSGIXPROC) (GLenum light, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETFRAGMENTLIGHTIVSGIXPROC) (GLenum light, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETFRAGMENTMATERIALFVSGIXPROC) (GLenum face, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETFRAGMENTMATERIALIVSGIXPROC) (GLenum face, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLLIGHTENVISGIXPROC) (GLenum pname, GLint param);
+#endif
+
+#ifndef GL_IBM_rasterpos_clip
+#define GL_IBM_rasterpos_clip 1
+#endif
+
+#ifndef GL_HP_texture_lighting
+#define GL_HP_texture_lighting 1
+#endif
+
+#ifndef GL_EXT_draw_range_elements
+#define GL_EXT_draw_range_elements 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawRangeElementsEXT (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTSEXTPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
+#endif
+
+#ifndef GL_WIN_phong_shading
+#define GL_WIN_phong_shading 1
+#endif
+
+#ifndef GL_WIN_specular_fog
+#define GL_WIN_specular_fog 1
+#endif
+
+#ifndef GL_EXT_light_texture
+#define GL_EXT_light_texture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glApplyTextureEXT (GLenum mode);
+GLAPI void APIENTRY glTextureLightEXT (GLenum pname);
+GLAPI void APIENTRY glTextureMaterialEXT (GLenum face, GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLAPPLYTEXTUREEXTPROC) (GLenum mode);
+typedef void (APIENTRYP PFNGLTEXTURELIGHTEXTPROC) (GLenum pname);
+typedef void (APIENTRYP PFNGLTEXTUREMATERIALEXTPROC) (GLenum face, GLenum mode);
+#endif
+
+#ifndef GL_SGIX_blend_alpha_minmax
+#define GL_SGIX_blend_alpha_minmax 1
+#endif
+
+#ifndef GL_EXT_bgra
+#define GL_EXT_bgra 1
+#endif
+
+#ifndef GL_SGIX_async
+#define GL_SGIX_async 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glAsyncMarkerSGIX (GLuint marker);
+GLAPI GLint APIENTRY glFinishAsyncSGIX (GLuint *markerp);
+GLAPI GLint APIENTRY glPollAsyncSGIX (GLuint *markerp);
+GLAPI GLuint APIENTRY glGenAsyncMarkersSGIX (GLsizei range);
+GLAPI void APIENTRY glDeleteAsyncMarkersSGIX (GLuint marker, GLsizei range);
+GLAPI GLboolean APIENTRY glIsAsyncMarkerSGIX (GLuint marker);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLASYNCMARKERSGIXPROC) (GLuint marker);
+typedef GLint (APIENTRYP PFNGLFINISHASYNCSGIXPROC) (GLuint *markerp);
+typedef GLint (APIENTRYP PFNGLPOLLASYNCSGIXPROC) (GLuint *markerp);
+typedef GLuint (APIENTRYP PFNGLGENASYNCMARKERSSGIXPROC) (GLsizei range);
+typedef void (APIENTRYP PFNGLDELETEASYNCMARKERSSGIXPROC) (GLuint marker, GLsizei range);
+typedef GLboolean (APIENTRYP PFNGLISASYNCMARKERSGIXPROC) (GLuint marker);
+#endif
+
+#ifndef GL_SGIX_async_pixel
+#define GL_SGIX_async_pixel 1
+#endif
+
+#ifndef GL_SGIX_async_histogram
+#define GL_SGIX_async_histogram 1
+#endif
+
+#ifndef GL_INTEL_parallel_arrays
+#define GL_INTEL_parallel_arrays 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexPointervINTEL (GLint size, GLenum type, const GLvoid* *pointer);
+GLAPI void APIENTRY glNormalPointervINTEL (GLenum type, const GLvoid* *pointer);
+GLAPI void APIENTRY glColorPointervINTEL (GLint size, GLenum type, const GLvoid* *pointer);
+GLAPI void APIENTRY glTexCoordPointervINTEL (GLint size, GLenum type, const GLvoid* *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXPOINTERVINTELPROC) (GLint size, GLenum type, const GLvoid* *pointer);
+typedef void (APIENTRYP PFNGLNORMALPOINTERVINTELPROC) (GLenum type, const GLvoid* *pointer);
+typedef void (APIENTRYP PFNGLCOLORPOINTERVINTELPROC) (GLint size, GLenum type, const GLvoid* *pointer);
+typedef void (APIENTRYP PFNGLTEXCOORDPOINTERVINTELPROC) (GLint size, GLenum type, const GLvoid* *pointer);
+#endif
+
+#ifndef GL_HP_occlusion_test
+#define GL_HP_occlusion_test 1
+#endif
+
+#ifndef GL_EXT_pixel_transform
+#define GL_EXT_pixel_transform 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPixelTransformParameteriEXT (GLenum target, GLenum pname, GLint param);
+GLAPI void APIENTRY glPixelTransformParameterfEXT (GLenum target, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glPixelTransformParameterivEXT (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glPixelTransformParameterfvEXT (GLenum target, GLenum pname, const GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPIXELTRANSFORMPARAMETERIEXTPROC) (GLenum target, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLPIXELTRANSFORMPARAMETERFEXTPROC) (GLenum target, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLPIXELTRANSFORMPARAMETERIVEXTPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLPIXELTRANSFORMPARAMETERFVEXTPROC) (GLenum target, GLenum pname, const GLfloat *params);
+#endif
+
+#ifndef GL_EXT_pixel_transform_color_table
+#define GL_EXT_pixel_transform_color_table 1
+#endif
+
+#ifndef GL_EXT_shared_texture_palette
+#define GL_EXT_shared_texture_palette 1
+#endif
+
+#ifndef GL_EXT_separate_specular_color
+#define GL_EXT_separate_specular_color 1
+#endif
+
+#ifndef GL_EXT_secondary_color
+#define GL_EXT_secondary_color 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glSecondaryColor3bEXT (GLbyte red, GLbyte green, GLbyte blue);
+GLAPI void APIENTRY glSecondaryColor3bvEXT (const GLbyte *v);
+GLAPI void APIENTRY glSecondaryColor3dEXT (GLdouble red, GLdouble green, GLdouble blue);
+GLAPI void APIENTRY glSecondaryColor3dvEXT (const GLdouble *v);
+GLAPI void APIENTRY glSecondaryColor3fEXT (GLfloat red, GLfloat green, GLfloat blue);
+GLAPI void APIENTRY glSecondaryColor3fvEXT (const GLfloat *v);
+GLAPI void APIENTRY glSecondaryColor3iEXT (GLint red, GLint green, GLint blue);
+GLAPI void APIENTRY glSecondaryColor3ivEXT (const GLint *v);
+GLAPI void APIENTRY glSecondaryColor3sEXT (GLshort red, GLshort green, GLshort blue);
+GLAPI void APIENTRY glSecondaryColor3svEXT (const GLshort *v);
+GLAPI void APIENTRY glSecondaryColor3ubEXT (GLubyte red, GLubyte green, GLubyte blue);
+GLAPI void APIENTRY glSecondaryColor3ubvEXT (const GLubyte *v);
+GLAPI void APIENTRY glSecondaryColor3uiEXT (GLuint red, GLuint green, GLuint blue);
+GLAPI void APIENTRY glSecondaryColor3uivEXT (const GLuint *v);
+GLAPI void APIENTRY glSecondaryColor3usEXT (GLushort red, GLushort green, GLushort blue);
+GLAPI void APIENTRY glSecondaryColor3usvEXT (const GLushort *v);
+GLAPI void APIENTRY glSecondaryColorPointerEXT (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3BEXTPROC) (GLbyte red, GLbyte green, GLbyte blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3BVEXTPROC) (const GLbyte *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3DEXTPROC) (GLdouble red, GLdouble green, GLdouble blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3DVEXTPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3FEXTPROC) (GLfloat red, GLfloat green, GLfloat blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3FVEXTPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3IEXTPROC) (GLint red, GLint green, GLint blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3IVEXTPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3SEXTPROC) (GLshort red, GLshort green, GLshort blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3SVEXTPROC) (const GLshort *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UBEXTPROC) (GLubyte red, GLubyte green, GLubyte blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UBVEXTPROC) (const GLubyte *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UIEXTPROC) (GLuint red, GLuint green, GLuint blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3UIVEXTPROC) (const GLuint *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3USEXTPROC) (GLushort red, GLushort green, GLushort blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3USVEXTPROC) (const GLushort *v);
+typedef void (APIENTRYP PFNGLSECONDARYCOLORPOINTEREXTPROC) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif
+
+#ifndef GL_EXT_texture_perturb_normal
+#define GL_EXT_texture_perturb_normal 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTextureNormalEXT (GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXTURENORMALEXTPROC) (GLenum mode);
+#endif
+
+#ifndef GL_EXT_multi_draw_arrays
+#define GL_EXT_multi_draw_arrays 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glMultiDrawArraysEXT (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
+GLAPI void APIENTRY glMultiDrawElementsEXT (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLMULTIDRAWARRAYSEXTPROC) (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
+typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTSEXTPROC) (GLenum mode, const GLsizei *count, GLenum type, const GLvoid* *indices, GLsizei primcount);
+#endif
+
+#ifndef GL_EXT_fog_coord
+#define GL_EXT_fog_coord 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFogCoordfEXT (GLfloat coord);
+GLAPI void APIENTRY glFogCoordfvEXT (const GLfloat *coord);
+GLAPI void APIENTRY glFogCoorddEXT (GLdouble coord);
+GLAPI void APIENTRY glFogCoorddvEXT (const GLdouble *coord);
+GLAPI void APIENTRY glFogCoordPointerEXT (GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFOGCOORDFEXTPROC) (GLfloat coord);
+typedef void (APIENTRYP PFNGLFOGCOORDFVEXTPROC) (const GLfloat *coord);
+typedef void (APIENTRYP PFNGLFOGCOORDDEXTPROC) (GLdouble coord);
+typedef void (APIENTRYP PFNGLFOGCOORDDVEXTPROC) (const GLdouble *coord);
+typedef void (APIENTRYP PFNGLFOGCOORDPOINTEREXTPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif
+
+#ifndef GL_REND_screen_coordinates
+#define GL_REND_screen_coordinates 1
+#endif
+
+#ifndef GL_EXT_coordinate_frame
+#define GL_EXT_coordinate_frame 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTangent3bEXT (GLbyte tx, GLbyte ty, GLbyte tz);
+GLAPI void APIENTRY glTangent3bvEXT (const GLbyte *v);
+GLAPI void APIENTRY glTangent3dEXT (GLdouble tx, GLdouble ty, GLdouble tz);
+GLAPI void APIENTRY glTangent3dvEXT (const GLdouble *v);
+GLAPI void APIENTRY glTangent3fEXT (GLfloat tx, GLfloat ty, GLfloat tz);
+GLAPI void APIENTRY glTangent3fvEXT (const GLfloat *v);
+GLAPI void APIENTRY glTangent3iEXT (GLint tx, GLint ty, GLint tz);
+GLAPI void APIENTRY glTangent3ivEXT (const GLint *v);
+GLAPI void APIENTRY glTangent3sEXT (GLshort tx, GLshort ty, GLshort tz);
+GLAPI void APIENTRY glTangent3svEXT (const GLshort *v);
+GLAPI void APIENTRY glBinormal3bEXT (GLbyte bx, GLbyte by, GLbyte bz);
+GLAPI void APIENTRY glBinormal3bvEXT (const GLbyte *v);
+GLAPI void APIENTRY glBinormal3dEXT (GLdouble bx, GLdouble by, GLdouble bz);
+GLAPI void APIENTRY glBinormal3dvEXT (const GLdouble *v);
+GLAPI void APIENTRY glBinormal3fEXT (GLfloat bx, GLfloat by, GLfloat bz);
+GLAPI void APIENTRY glBinormal3fvEXT (const GLfloat *v);
+GLAPI void APIENTRY glBinormal3iEXT (GLint bx, GLint by, GLint bz);
+GLAPI void APIENTRY glBinormal3ivEXT (const GLint *v);
+GLAPI void APIENTRY glBinormal3sEXT (GLshort bx, GLshort by, GLshort bz);
+GLAPI void APIENTRY glBinormal3svEXT (const GLshort *v);
+GLAPI void APIENTRY glTangentPointerEXT (GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glBinormalPointerEXT (GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTANGENT3BEXTPROC) (GLbyte tx, GLbyte ty, GLbyte tz);
+typedef void (APIENTRYP PFNGLTANGENT3BVEXTPROC) (const GLbyte *v);
+typedef void (APIENTRYP PFNGLTANGENT3DEXTPROC) (GLdouble tx, GLdouble ty, GLdouble tz);
+typedef void (APIENTRYP PFNGLTANGENT3DVEXTPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLTANGENT3FEXTPROC) (GLfloat tx, GLfloat ty, GLfloat tz);
+typedef void (APIENTRYP PFNGLTANGENT3FVEXTPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLTANGENT3IEXTPROC) (GLint tx, GLint ty, GLint tz);
+typedef void (APIENTRYP PFNGLTANGENT3IVEXTPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLTANGENT3SEXTPROC) (GLshort tx, GLshort ty, GLshort tz);
+typedef void (APIENTRYP PFNGLTANGENT3SVEXTPROC) (const GLshort *v);
+typedef void (APIENTRYP PFNGLBINORMAL3BEXTPROC) (GLbyte bx, GLbyte by, GLbyte bz);
+typedef void (APIENTRYP PFNGLBINORMAL3BVEXTPROC) (const GLbyte *v);
+typedef void (APIENTRYP PFNGLBINORMAL3DEXTPROC) (GLdouble bx, GLdouble by, GLdouble bz);
+typedef void (APIENTRYP PFNGLBINORMAL3DVEXTPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLBINORMAL3FEXTPROC) (GLfloat bx, GLfloat by, GLfloat bz);
+typedef void (APIENTRYP PFNGLBINORMAL3FVEXTPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLBINORMAL3IEXTPROC) (GLint bx, GLint by, GLint bz);
+typedef void (APIENTRYP PFNGLBINORMAL3IVEXTPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLBINORMAL3SEXTPROC) (GLshort bx, GLshort by, GLshort bz);
+typedef void (APIENTRYP PFNGLBINORMAL3SVEXTPROC) (const GLshort *v);
+typedef void (APIENTRYP PFNGLTANGENTPOINTEREXTPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLBINORMALPOINTEREXTPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif
+
+#ifndef GL_EXT_texture_env_combine
+#define GL_EXT_texture_env_combine 1
+#endif
+
+#ifndef GL_APPLE_specular_vector
+#define GL_APPLE_specular_vector 1
+#endif
+
+#ifndef GL_APPLE_transform_hint
+#define GL_APPLE_transform_hint 1
+#endif
+
+#ifndef GL_SGIX_fog_scale
+#define GL_SGIX_fog_scale 1
+#endif
+
+#ifndef GL_SUNX_constant_data
+#define GL_SUNX_constant_data 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFinishTextureSUNX (void);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFINISHTEXTURESUNXPROC) (void);
+#endif
+
+#ifndef GL_SUN_global_alpha
+#define GL_SUN_global_alpha 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGlobalAlphaFactorbSUN (GLbyte factor);
+GLAPI void APIENTRY glGlobalAlphaFactorsSUN (GLshort factor);
+GLAPI void APIENTRY glGlobalAlphaFactoriSUN (GLint factor);
+GLAPI void APIENTRY glGlobalAlphaFactorfSUN (GLfloat factor);
+GLAPI void APIENTRY glGlobalAlphaFactordSUN (GLdouble factor);
+GLAPI void APIENTRY glGlobalAlphaFactorubSUN (GLubyte factor);
+GLAPI void APIENTRY glGlobalAlphaFactorusSUN (GLushort factor);
+GLAPI void APIENTRY glGlobalAlphaFactoruiSUN (GLuint factor);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORBSUNPROC) (GLbyte factor);
+typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORSSUNPROC) (GLshort factor);
+typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORISUNPROC) (GLint factor);
+typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORFSUNPROC) (GLfloat factor);
+typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORDSUNPROC) (GLdouble factor);
+typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORUBSUNPROC) (GLubyte factor);
+typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORUSSUNPROC) (GLushort factor);
+typedef void (APIENTRYP PFNGLGLOBALALPHAFACTORUISUNPROC) (GLuint factor);
+#endif
+
+#ifndef GL_SUN_triangle_list
+#define GL_SUN_triangle_list 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glReplacementCodeuiSUN (GLuint code);
+GLAPI void APIENTRY glReplacementCodeusSUN (GLushort code);
+GLAPI void APIENTRY glReplacementCodeubSUN (GLubyte code);
+GLAPI void APIENTRY glReplacementCodeuivSUN (const GLuint *code);
+GLAPI void APIENTRY glReplacementCodeusvSUN (const GLushort *code);
+GLAPI void APIENTRY glReplacementCodeubvSUN (const GLubyte *code);
+GLAPI void APIENTRY glReplacementCodePointerSUN (GLenum type, GLsizei stride, const GLvoid* *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUISUNPROC) (GLuint code);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUSSUNPROC) (GLushort code);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUBSUNPROC) (GLubyte code);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUIVSUNPROC) (const GLuint *code);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUSVSUNPROC) (const GLushort *code);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUBVSUNPROC) (const GLubyte *code);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEPOINTERSUNPROC) (GLenum type, GLsizei stride, const GLvoid* *pointer);
+#endif
+
+#ifndef GL_SUN_vertex
+#define GL_SUN_vertex 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glColor4ubVertex2fSUN (GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y);
+GLAPI void APIENTRY glColor4ubVertex2fvSUN (const GLubyte *c, const GLfloat *v);
+GLAPI void APIENTRY glColor4ubVertex3fSUN (GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glColor4ubVertex3fvSUN (const GLubyte *c, const GLfloat *v);
+GLAPI void APIENTRY glColor3fVertex3fSUN (GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glColor3fVertex3fvSUN (const GLfloat *c, const GLfloat *v);
+GLAPI void APIENTRY glNormal3fVertex3fSUN (GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glNormal3fVertex3fvSUN (const GLfloat *n, const GLfloat *v);
+GLAPI void APIENTRY glColor4fNormal3fVertex3fSUN (GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glColor4fNormal3fVertex3fvSUN (const GLfloat *c, const GLfloat *n, const GLfloat *v);
+GLAPI void APIENTRY glTexCoord2fVertex3fSUN (GLfloat s, GLfloat t, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glTexCoord2fVertex3fvSUN (const GLfloat *tc, const GLfloat *v);
+GLAPI void APIENTRY glTexCoord4fVertex4fSUN (GLfloat s, GLfloat t, GLfloat p, GLfloat q, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glTexCoord4fVertex4fvSUN (const GLfloat *tc, const GLfloat *v);
+GLAPI void APIENTRY glTexCoord2fColor4ubVertex3fSUN (GLfloat s, GLfloat t, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glTexCoord2fColor4ubVertex3fvSUN (const GLfloat *tc, const GLubyte *c, const GLfloat *v);
+GLAPI void APIENTRY glTexCoord2fColor3fVertex3fSUN (GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glTexCoord2fColor3fVertex3fvSUN (const GLfloat *tc, const GLfloat *c, const GLfloat *v);
+GLAPI void APIENTRY glTexCoord2fNormal3fVertex3fSUN (GLfloat s, GLfloat t, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glTexCoord2fNormal3fVertex3fvSUN (const GLfloat *tc, const GLfloat *n, const GLfloat *v);
+GLAPI void APIENTRY glTexCoord2fColor4fNormal3fVertex3fSUN (GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glTexCoord2fColor4fNormal3fVertex3fvSUN (const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
+GLAPI void APIENTRY glTexCoord4fColor4fNormal3fVertex4fSUN (GLfloat s, GLfloat t, GLfloat p, GLfloat q, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glTexCoord4fColor4fNormal3fVertex4fvSUN (const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
+GLAPI void APIENTRY glReplacementCodeuiVertex3fSUN (GLuint rc, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glReplacementCodeuiVertex3fvSUN (const GLuint *rc, const GLfloat *v);
+GLAPI void APIENTRY glReplacementCodeuiColor4ubVertex3fSUN (GLuint rc, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glReplacementCodeuiColor4ubVertex3fvSUN (const GLuint *rc, const GLubyte *c, const GLfloat *v);
+GLAPI void APIENTRY glReplacementCodeuiColor3fVertex3fSUN (GLuint rc, GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glReplacementCodeuiColor3fVertex3fvSUN (const GLuint *rc, const GLfloat *c, const GLfloat *v);
+GLAPI void APIENTRY glReplacementCodeuiNormal3fVertex3fSUN (GLuint rc, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glReplacementCodeuiNormal3fVertex3fvSUN (const GLuint *rc, const GLfloat *n, const GLfloat *v);
+GLAPI void APIENTRY glReplacementCodeuiColor4fNormal3fVertex3fSUN (GLuint rc, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glReplacementCodeuiColor4fNormal3fVertex3fvSUN (const GLuint *rc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
+GLAPI void APIENTRY glReplacementCodeuiTexCoord2fVertex3fSUN (GLuint rc, GLfloat s, GLfloat t, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glReplacementCodeuiTexCoord2fVertex3fvSUN (const GLuint *rc, const GLfloat *tc, const GLfloat *v);
+GLAPI void APIENTRY glReplacementCodeuiTexCoord2fNormal3fVertex3fSUN (GLuint rc, GLfloat s, GLfloat t, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glReplacementCodeuiTexCoord2fNormal3fVertex3fvSUN (const GLuint *rc, const GLfloat *tc, const GLfloat *n, const GLfloat *v);
+GLAPI void APIENTRY glReplacementCodeuiTexCoord2fColor4fNormal3fVertex3fSUN (GLuint rc, GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glReplacementCodeuiTexCoord2fColor4fNormal3fVertex3fvSUN (const GLuint *rc, const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOLOR4UBVERTEX2FSUNPROC) (GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y);
+typedef void (APIENTRYP PFNGLCOLOR4UBVERTEX2FVSUNPROC) (const GLubyte *c, const GLfloat *v);
+typedef void (APIENTRYP PFNGLCOLOR4UBVERTEX3FSUNPROC) (GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLCOLOR4UBVERTEX3FVSUNPROC) (const GLubyte *c, const GLfloat *v);
+typedef void (APIENTRYP PFNGLCOLOR3FVERTEX3FSUNPROC) (GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLCOLOR3FVERTEX3FVSUNPROC) (const GLfloat *c, const GLfloat *v);
+typedef void (APIENTRYP PFNGLNORMAL3FVERTEX3FSUNPROC) (GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLNORMAL3FVERTEX3FVSUNPROC) (const GLfloat *n, const GLfloat *v);
+typedef void (APIENTRYP PFNGLCOLOR4FNORMAL3FVERTEX3FSUNPROC) (GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLCOLOR4FNORMAL3FVERTEX3FVSUNPROC) (const GLfloat *c, const GLfloat *n, const GLfloat *v);
+typedef void (APIENTRYP PFNGLTEXCOORD2FVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLTEXCOORD2FVERTEX3FVSUNPROC) (const GLfloat *tc, const GLfloat *v);
+typedef void (APIENTRYP PFNGLTEXCOORD4FVERTEX4FSUNPROC) (GLfloat s, GLfloat t, GLfloat p, GLfloat q, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLTEXCOORD4FVERTEX4FVSUNPROC) (const GLfloat *tc, const GLfloat *v);
+typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR4UBVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR4UBVERTEX3FVSUNPROC) (const GLfloat *tc, const GLubyte *c, const GLfloat *v);
+typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR3FVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR3FVERTEX3FVSUNPROC) (const GLfloat *tc, const GLfloat *c, const GLfloat *v);
+typedef void (APIENTRYP PFNGLTEXCOORD2FNORMAL3FVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLTEXCOORD2FNORMAL3FVERTEX3FVSUNPROC) (const GLfloat *tc, const GLfloat *n, const GLfloat *v);
+typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR4FNORMAL3FVERTEX3FSUNPROC) (GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLTEXCOORD2FCOLOR4FNORMAL3FVERTEX3FVSUNPROC) (const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
+typedef void (APIENTRYP PFNGLTEXCOORD4FCOLOR4FNORMAL3FVERTEX4FSUNPROC) (GLfloat s, GLfloat t, GLfloat p, GLfloat q, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLTEXCOORD4FCOLOR4FNORMAL3FVERTEX4FVSUNPROC) (const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUIVERTEX3FSUNPROC) (GLuint rc, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUIVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR4UBVERTEX3FSUNPROC) (GLuint rc, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR4UBVERTEX3FVSUNPROC) (const GLuint *rc, const GLubyte *c, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR3FVERTEX3FSUNPROC) (GLuint rc, GLfloat r, GLfloat g, GLfloat b, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *c, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUINORMAL3FVERTEX3FSUNPROC) (GLuint rc, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUINORMAL3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *n, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR4FNORMAL3FVERTEX3FSUNPROC) (GLuint rc, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUICOLOR4FNORMAL3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FVERTEX3FSUNPROC) (GLuint rc, GLfloat s, GLfloat t, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *tc, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FNORMAL3FVERTEX3FSUNPROC) (GLuint rc, GLfloat s, GLfloat t, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FNORMAL3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *tc, const GLfloat *n, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FCOLOR4FNORMAL3FVERTEX3FSUNPROC) (GLuint rc, GLfloat s, GLfloat t, GLfloat r, GLfloat g, GLfloat b, GLfloat a, GLfloat nx, GLfloat ny, GLfloat nz, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLREPLACEMENTCODEUITEXCOORD2FCOLOR4FNORMAL3FVERTEX3FVSUNPROC) (const GLuint *rc, const GLfloat *tc, const GLfloat *c, const GLfloat *n, const GLfloat *v);
+#endif
+
+#ifndef GL_EXT_blend_func_separate
+#define GL_EXT_blend_func_separate 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendFuncSeparateEXT (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEEXTPROC) (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
+#endif
+
+#ifndef GL_INGR_blend_func_separate
+#define GL_INGR_blend_func_separate 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendFuncSeparateINGR (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEINGRPROC) (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
+#endif
+
+#ifndef GL_INGR_color_clamp
+#define GL_INGR_color_clamp 1
+#endif
+
+#ifndef GL_INGR_interlace_read
+#define GL_INGR_interlace_read 1
+#endif
+
+#ifndef GL_EXT_stencil_wrap
+#define GL_EXT_stencil_wrap 1
+#endif
+
+#ifndef GL_EXT_422_pixels
+#define GL_EXT_422_pixels 1
+#endif
+
+#ifndef GL_NV_texgen_reflection
+#define GL_NV_texgen_reflection 1
+#endif
+
+#ifndef GL_SUN_convolution_border_modes
+#define GL_SUN_convolution_border_modes 1
+#endif
+
+#ifndef GL_EXT_texture_env_add
+#define GL_EXT_texture_env_add 1
+#endif
+
+#ifndef GL_EXT_texture_lod_bias
+#define GL_EXT_texture_lod_bias 1
+#endif
+
+#ifndef GL_EXT_texture_filter_anisotropic
+#define GL_EXT_texture_filter_anisotropic 1
+#endif
+
+#ifndef GL_EXT_vertex_weighting
+#define GL_EXT_vertex_weighting 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexWeightfEXT (GLfloat weight);
+GLAPI void APIENTRY glVertexWeightfvEXT (const GLfloat *weight);
+GLAPI void APIENTRY glVertexWeightPointerEXT (GLsizei size, GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXWEIGHTFEXTPROC) (GLfloat weight);
+typedef void (APIENTRYP PFNGLVERTEXWEIGHTFVEXTPROC) (const GLfloat *weight);
+typedef void (APIENTRYP PFNGLVERTEXWEIGHTPOINTEREXTPROC) (GLsizei size, GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif
+
+#ifndef GL_NV_light_max_exponent
+#define GL_NV_light_max_exponent 1
+#endif
+
+#ifndef GL_NV_vertex_array_range
+#define GL_NV_vertex_array_range 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFlushVertexArrayRangeNV (void);
+GLAPI void APIENTRY glVertexArrayRangeNV (GLsizei length, const GLvoid *pointer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFLUSHVERTEXARRAYRANGENVPROC) (void);
+typedef void (APIENTRYP PFNGLVERTEXARRAYRANGENVPROC) (GLsizei length, const GLvoid *pointer);
+#endif
+
+#ifndef GL_NV_register_combiners
+#define GL_NV_register_combiners 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glCombinerParameterfvNV (GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glCombinerParameterfNV (GLenum pname, GLfloat param);
+GLAPI void APIENTRY glCombinerParameterivNV (GLenum pname, const GLint *params);
+GLAPI void APIENTRY glCombinerParameteriNV (GLenum pname, GLint param);
+GLAPI void APIENTRY glCombinerInputNV (GLenum stage, GLenum portion, GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage);
+GLAPI void APIENTRY glCombinerOutputNV (GLenum stage, GLenum portion, GLenum abOutput, GLenum cdOutput, GLenum sumOutput, GLenum scale, GLenum bias, GLboolean abDotProduct, GLboolean cdDotProduct, GLboolean muxSum);
+GLAPI void APIENTRY glFinalCombinerInputNV (GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage);
+GLAPI void APIENTRY glGetCombinerInputParameterfvNV (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetCombinerInputParameterivNV (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetCombinerOutputParameterfvNV (GLenum stage, GLenum portion, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetCombinerOutputParameterivNV (GLenum stage, GLenum portion, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetFinalCombinerInputParameterfvNV (GLenum variable, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetFinalCombinerInputParameterivNV (GLenum variable, GLenum pname, GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOMBINERPARAMETERFVNVPROC) (GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLCOMBINERPARAMETERFNVPROC) (GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLCOMBINERPARAMETERIVNVPROC) (GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLCOMBINERPARAMETERINVPROC) (GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLCOMBINERINPUTNVPROC) (GLenum stage, GLenum portion, GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage);
+typedef void (APIENTRYP PFNGLCOMBINEROUTPUTNVPROC) (GLenum stage, GLenum portion, GLenum abOutput, GLenum cdOutput, GLenum sumOutput, GLenum scale, GLenum bias, GLboolean abDotProduct, GLboolean cdDotProduct, GLboolean muxSum);
+typedef void (APIENTRYP PFNGLFINALCOMBINERINPUTNVPROC) (GLenum variable, GLenum input, GLenum mapping, GLenum componentUsage);
+typedef void (APIENTRYP PFNGLGETCOMBINERINPUTPARAMETERFVNVPROC) (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETCOMBINERINPUTPARAMETERIVNVPROC) (GLenum stage, GLenum portion, GLenum variable, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETCOMBINEROUTPUTPARAMETERFVNVPROC) (GLenum stage, GLenum portion, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETCOMBINEROUTPUTPARAMETERIVNVPROC) (GLenum stage, GLenum portion, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETFINALCOMBINERINPUTPARAMETERFVNVPROC) (GLenum variable, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETFINALCOMBINERINPUTPARAMETERIVNVPROC) (GLenum variable, GLenum pname, GLint *params);
+#endif
+
+#ifndef GL_NV_fog_distance
+#define GL_NV_fog_distance 1
+#endif
+
+#ifndef GL_NV_texgen_emboss
+#define GL_NV_texgen_emboss 1
+#endif
+
+#ifndef GL_NV_blend_square
+#define GL_NV_blend_square 1
+#endif
+
+#ifndef GL_NV_texture_env_combine4
+#define GL_NV_texture_env_combine4 1
+#endif
+
+#ifndef GL_MESA_resize_buffers
+#define GL_MESA_resize_buffers 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glResizeBuffersMESA (void);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLRESIZEBUFFERSMESAPROC) (void);
+#endif
+
+#ifndef GL_MESA_window_pos
+#define GL_MESA_window_pos 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glWindowPos2dMESA (GLdouble x, GLdouble y);
+GLAPI void APIENTRY glWindowPos2dvMESA (const GLdouble *v);
+GLAPI void APIENTRY glWindowPos2fMESA (GLfloat x, GLfloat y);
+GLAPI void APIENTRY glWindowPos2fvMESA (const GLfloat *v);
+GLAPI void APIENTRY glWindowPos2iMESA (GLint x, GLint y);
+GLAPI void APIENTRY glWindowPos2ivMESA (const GLint *v);
+GLAPI void APIENTRY glWindowPos2sMESA (GLshort x, GLshort y);
+GLAPI void APIENTRY glWindowPos2svMESA (const GLshort *v);
+GLAPI void APIENTRY glWindowPos3dMESA (GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glWindowPos3dvMESA (const GLdouble *v);
+GLAPI void APIENTRY glWindowPos3fMESA (GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glWindowPos3fvMESA (const GLfloat *v);
+GLAPI void APIENTRY glWindowPos3iMESA (GLint x, GLint y, GLint z);
+GLAPI void APIENTRY glWindowPos3ivMESA (const GLint *v);
+GLAPI void APIENTRY glWindowPos3sMESA (GLshort x, GLshort y, GLshort z);
+GLAPI void APIENTRY glWindowPos3svMESA (const GLshort *v);
+GLAPI void APIENTRY glWindowPos4dMESA (GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glWindowPos4dvMESA (const GLdouble *v);
+GLAPI void APIENTRY glWindowPos4fMESA (GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glWindowPos4fvMESA (const GLfloat *v);
+GLAPI void APIENTRY glWindowPos4iMESA (GLint x, GLint y, GLint z, GLint w);
+GLAPI void APIENTRY glWindowPos4ivMESA (const GLint *v);
+GLAPI void APIENTRY glWindowPos4sMESA (GLshort x, GLshort y, GLshort z, GLshort w);
+GLAPI void APIENTRY glWindowPos4svMESA (const GLshort *v);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLWINDOWPOS2DMESAPROC) (GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2DVMESAPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2FMESAPROC) (GLfloat x, GLfloat y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2FVMESAPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2IMESAPROC) (GLint x, GLint y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2IVMESAPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS2SMESAPROC) (GLshort x, GLshort y);
+typedef void (APIENTRYP PFNGLWINDOWPOS2SVMESAPROC) (const GLshort *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3DMESAPROC) (GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3DVMESAPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3FMESAPROC) (GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3FVMESAPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3IMESAPROC) (GLint x, GLint y, GLint z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3IVMESAPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS3SMESAPROC) (GLshort x, GLshort y, GLshort z);
+typedef void (APIENTRYP PFNGLWINDOWPOS3SVMESAPROC) (const GLshort *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS4DMESAPROC) (GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLWINDOWPOS4DVMESAPROC) (const GLdouble *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS4FMESAPROC) (GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLWINDOWPOS4FVMESAPROC) (const GLfloat *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS4IMESAPROC) (GLint x, GLint y, GLint z, GLint w);
+typedef void (APIENTRYP PFNGLWINDOWPOS4IVMESAPROC) (const GLint *v);
+typedef void (APIENTRYP PFNGLWINDOWPOS4SMESAPROC) (GLshort x, GLshort y, GLshort z, GLshort w);
+typedef void (APIENTRYP PFNGLWINDOWPOS4SVMESAPROC) (const GLshort *v);
+#endif
+
+#ifndef GL_IBM_cull_vertex
+#define GL_IBM_cull_vertex 1
+#endif
+
+#ifndef GL_IBM_multimode_draw_arrays
+#define GL_IBM_multimode_draw_arrays 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glMultiModeDrawArraysIBM (const GLenum *mode, const GLint *first, const GLsizei *count, GLsizei primcount, GLint modestride);
+GLAPI void APIENTRY glMultiModeDrawElementsIBM (const GLenum *mode, const GLsizei *count, GLenum type, const GLvoid* const *indices, GLsizei primcount, GLint modestride);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLMULTIMODEDRAWARRAYSIBMPROC) (const GLenum *mode, const GLint *first, const GLsizei *count, GLsizei primcount, GLint modestride);
+typedef void (APIENTRYP PFNGLMULTIMODEDRAWELEMENTSIBMPROC) (const GLenum *mode, const GLsizei *count, GLenum type, const GLvoid* const *indices, GLsizei primcount, GLint modestride);
+#endif
+
+#ifndef GL_IBM_vertex_array_lists
+#define GL_IBM_vertex_array_lists 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glColorPointerListIBM (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+GLAPI void APIENTRY glSecondaryColorPointerListIBM (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+GLAPI void APIENTRY glEdgeFlagPointerListIBM (GLint stride, const GLboolean* *pointer, GLint ptrstride);
+GLAPI void APIENTRY glFogCoordPointerListIBM (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+GLAPI void APIENTRY glIndexPointerListIBM (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+GLAPI void APIENTRY glNormalPointerListIBM (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+GLAPI void APIENTRY glTexCoordPointerListIBM (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+GLAPI void APIENTRY glVertexPointerListIBM (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOLORPOINTERLISTIBMPROC) (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+typedef void (APIENTRYP PFNGLSECONDARYCOLORPOINTERLISTIBMPROC) (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+typedef void (APIENTRYP PFNGLEDGEFLAGPOINTERLISTIBMPROC) (GLint stride, const GLboolean* *pointer, GLint ptrstride);
+typedef void (APIENTRYP PFNGLFOGCOORDPOINTERLISTIBMPROC) (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+typedef void (APIENTRYP PFNGLINDEXPOINTERLISTIBMPROC) (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+typedef void (APIENTRYP PFNGLNORMALPOINTERLISTIBMPROC) (GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+typedef void (APIENTRYP PFNGLTEXCOORDPOINTERLISTIBMPROC) (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+typedef void (APIENTRYP PFNGLVERTEXPOINTERLISTIBMPROC) (GLint size, GLenum type, GLint stride, const GLvoid* *pointer, GLint ptrstride);
+#endif
+
+#ifndef GL_SGIX_subsample
+#define GL_SGIX_subsample 1
+#endif
+
+#ifndef GL_SGIX_ycrcba
+#define GL_SGIX_ycrcba 1
+#endif
+
+#ifndef GL_SGIX_ycrcb_subsample
+#define GL_SGIX_ycrcb_subsample 1
+#endif
+
+#ifndef GL_SGIX_depth_pass_instrument
+#define GL_SGIX_depth_pass_instrument 1
+#endif
+
+#ifndef GL_3DFX_texture_compression_FXT1
+#define GL_3DFX_texture_compression_FXT1 1
+#endif
+
+#ifndef GL_3DFX_multisample
+#define GL_3DFX_multisample 1
+#endif
+
+#ifndef GL_3DFX_tbuffer
+#define GL_3DFX_tbuffer 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTbufferMask3DFX (GLuint mask);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTBUFFERMASK3DFXPROC) (GLuint mask);
+#endif
+
+#ifndef GL_EXT_multisample
+#define GL_EXT_multisample 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glSampleMaskEXT (GLclampf value, GLboolean invert);
+GLAPI void APIENTRY glSamplePatternEXT (GLenum pattern);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSAMPLEMASKEXTPROC) (GLclampf value, GLboolean invert);
+typedef void (APIENTRYP PFNGLSAMPLEPATTERNEXTPROC) (GLenum pattern);
+#endif
+
+#ifndef GL_SGIX_vertex_preclip
+#define GL_SGIX_vertex_preclip 1
+#endif
+
+#ifndef GL_SGIX_convolution_accuracy
+#define GL_SGIX_convolution_accuracy 1
+#endif
+
+#ifndef GL_SGIX_resample
+#define GL_SGIX_resample 1
+#endif
+
+#ifndef GL_SGIS_point_line_texgen
+#define GL_SGIS_point_line_texgen 1
+#endif
+
+#ifndef GL_SGIS_texture_color_mask
+#define GL_SGIS_texture_color_mask 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTextureColorMaskSGIS (GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXTURECOLORMASKSGISPROC) (GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
+#endif
+
+#ifndef GL_SGIX_igloo_interface
+#define GL_SGIX_igloo_interface 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glIglooInterfaceSGIX (GLenum pname, const GLvoid *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLIGLOOINTERFACESGIXPROC) (GLenum pname, const GLvoid *params);
+#endif
+
+#ifndef GL_EXT_texture_env_dot3
+#define GL_EXT_texture_env_dot3 1
+#endif
+
+#ifndef GL_ATI_texture_mirror_once
+#define GL_ATI_texture_mirror_once 1
+#endif
+
+#ifndef GL_NV_fence
+#define GL_NV_fence 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDeleteFencesNV (GLsizei n, const GLuint *fences);
+GLAPI void APIENTRY glGenFencesNV (GLsizei n, GLuint *fences);
+GLAPI GLboolean APIENTRY glIsFenceNV (GLuint fence);
+GLAPI GLboolean APIENTRY glTestFenceNV (GLuint fence);
+GLAPI void APIENTRY glGetFenceivNV (GLuint fence, GLenum pname, GLint *params);
+GLAPI void APIENTRY glFinishFenceNV (GLuint fence);
+GLAPI void APIENTRY glSetFenceNV (GLuint fence, GLenum condition);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDELETEFENCESNVPROC) (GLsizei n, const GLuint *fences);
+typedef void (APIENTRYP PFNGLGENFENCESNVPROC) (GLsizei n, GLuint *fences);
+typedef GLboolean (APIENTRYP PFNGLISFENCENVPROC) (GLuint fence);
+typedef GLboolean (APIENTRYP PFNGLTESTFENCENVPROC) (GLuint fence);
+typedef void (APIENTRYP PFNGLGETFENCEIVNVPROC) (GLuint fence, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLFINISHFENCENVPROC) (GLuint fence);
+typedef void (APIENTRYP PFNGLSETFENCENVPROC) (GLuint fence, GLenum condition);
+#endif
+
+#ifndef GL_NV_evaluators
+#define GL_NV_evaluators 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glMapControlPointsNV (GLenum target, GLuint index, GLenum type, GLsizei ustride, GLsizei vstride, GLint uorder, GLint vorder, GLboolean packed, const GLvoid *points);
+GLAPI void APIENTRY glMapParameterivNV (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glMapParameterfvNV (GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glGetMapControlPointsNV (GLenum target, GLuint index, GLenum type, GLsizei ustride, GLsizei vstride, GLboolean packed, GLvoid *points);
+GLAPI void APIENTRY glGetMapParameterivNV (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetMapParameterfvNV (GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetMapAttribParameterivNV (GLenum target, GLuint index, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetMapAttribParameterfvNV (GLenum target, GLuint index, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glEvalMapsNV (GLenum target, GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLMAPCONTROLPOINTSNVPROC) (GLenum target, GLuint index, GLenum type, GLsizei ustride, GLsizei vstride, GLint uorder, GLint vorder, GLboolean packed, const GLvoid *points);
+typedef void (APIENTRYP PFNGLMAPPARAMETERIVNVPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLMAPPARAMETERFVNVPROC) (GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLGETMAPCONTROLPOINTSNVPROC) (GLenum target, GLuint index, GLenum type, GLsizei ustride, GLsizei vstride, GLboolean packed, GLvoid *points);
+typedef void (APIENTRYP PFNGLGETMAPPARAMETERIVNVPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETMAPPARAMETERFVNVPROC) (GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETMAPATTRIBPARAMETERIVNVPROC) (GLenum target, GLuint index, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETMAPATTRIBPARAMETERFVNVPROC) (GLenum target, GLuint index, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLEVALMAPSNVPROC) (GLenum target, GLenum mode);
+#endif
+
+#ifndef GL_NV_packed_depth_stencil
+#define GL_NV_packed_depth_stencil 1
+#endif
+
+#ifndef GL_NV_register_combiners2
+#define GL_NV_register_combiners2 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glCombinerStageParameterfvNV (GLenum stage, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glGetCombinerStageParameterfvNV (GLenum stage, GLenum pname, GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOMBINERSTAGEPARAMETERFVNVPROC) (GLenum stage, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLGETCOMBINERSTAGEPARAMETERFVNVPROC) (GLenum stage, GLenum pname, GLfloat *params);
+#endif
+
+#ifndef GL_NV_texture_compression_vtc
+#define GL_NV_texture_compression_vtc 1
+#endif
+
+#ifndef GL_NV_texture_rectangle
+#define GL_NV_texture_rectangle 1
+#endif
+
+#ifndef GL_NV_texture_shader
+#define GL_NV_texture_shader 1
+#endif
+
+#ifndef GL_NV_texture_shader2
+#define GL_NV_texture_shader2 1
+#endif
+
+#ifndef GL_NV_vertex_array_range2
+#define GL_NV_vertex_array_range2 1
+#endif
+
+#ifndef GL_NV_vertex_program
+#define GL_NV_vertex_program 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLboolean APIENTRY glAreProgramsResidentNV (GLsizei n, const GLuint *programs, GLboolean *residences);
+GLAPI void APIENTRY glBindProgramNV (GLenum target, GLuint id);
+GLAPI void APIENTRY glDeleteProgramsNV (GLsizei n, const GLuint *programs);
+GLAPI void APIENTRY glExecuteProgramNV (GLenum target, GLuint id, const GLfloat *params);
+GLAPI void APIENTRY glGenProgramsNV (GLsizei n, GLuint *programs);
+GLAPI void APIENTRY glGetProgramParameterdvNV (GLenum target, GLuint index, GLenum pname, GLdouble *params);
+GLAPI void APIENTRY glGetProgramParameterfvNV (GLenum target, GLuint index, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetProgramivNV (GLuint id, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetProgramStringNV (GLuint id, GLenum pname, GLubyte *program);
+GLAPI void APIENTRY glGetTrackMatrixivNV (GLenum target, GLuint address, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVertexAttribdvNV (GLuint index, GLenum pname, GLdouble *params);
+GLAPI void APIENTRY glGetVertexAttribfvNV (GLuint index, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetVertexAttribivNV (GLuint index, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVertexAttribPointervNV (GLuint index, GLenum pname, GLvoid* *pointer);
+GLAPI GLboolean APIENTRY glIsProgramNV (GLuint id);
+GLAPI void APIENTRY glLoadProgramNV (GLenum target, GLuint id, GLsizei len, const GLubyte *program);
+GLAPI void APIENTRY glProgramParameter4dNV (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glProgramParameter4dvNV (GLenum target, GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glProgramParameter4fNV (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glProgramParameter4fvNV (GLenum target, GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glProgramParameters4dvNV (GLenum target, GLuint index, GLsizei count, const GLdouble *v);
+GLAPI void APIENTRY glProgramParameters4fvNV (GLenum target, GLuint index, GLsizei count, const GLfloat *v);
+GLAPI void APIENTRY glRequestResidentProgramsNV (GLsizei n, const GLuint *programs);
+GLAPI void APIENTRY glTrackMatrixNV (GLenum target, GLuint address, GLenum matrix, GLenum transform);
+GLAPI void APIENTRY glVertexAttribPointerNV (GLuint index, GLint fsize, GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glVertexAttrib1dNV (GLuint index, GLdouble x);
+GLAPI void APIENTRY glVertexAttrib1dvNV (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib1fNV (GLuint index, GLfloat x);
+GLAPI void APIENTRY glVertexAttrib1fvNV (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib1sNV (GLuint index, GLshort x);
+GLAPI void APIENTRY glVertexAttrib1svNV (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib2dNV (GLuint index, GLdouble x, GLdouble y);
+GLAPI void APIENTRY glVertexAttrib2dvNV (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib2fNV (GLuint index, GLfloat x, GLfloat y);
+GLAPI void APIENTRY glVertexAttrib2fvNV (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib2sNV (GLuint index, GLshort x, GLshort y);
+GLAPI void APIENTRY glVertexAttrib2svNV (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib3dNV (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glVertexAttrib3dvNV (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib3fNV (GLuint index, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glVertexAttrib3fvNV (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib3sNV (GLuint index, GLshort x, GLshort y, GLshort z);
+GLAPI void APIENTRY glVertexAttrib3svNV (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib4dNV (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glVertexAttrib4dvNV (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttrib4fNV (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glVertexAttrib4fvNV (GLuint index, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttrib4sNV (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
+GLAPI void APIENTRY glVertexAttrib4svNV (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttrib4ubNV (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
+GLAPI void APIENTRY glVertexAttrib4ubvNV (GLuint index, const GLubyte *v);
+GLAPI void APIENTRY glVertexAttribs1dvNV (GLuint index, GLsizei count, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribs1fvNV (GLuint index, GLsizei count, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttribs1svNV (GLuint index, GLsizei count, const GLshort *v);
+GLAPI void APIENTRY glVertexAttribs2dvNV (GLuint index, GLsizei count, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribs2fvNV (GLuint index, GLsizei count, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttribs2svNV (GLuint index, GLsizei count, const GLshort *v);
+GLAPI void APIENTRY glVertexAttribs3dvNV (GLuint index, GLsizei count, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribs3fvNV (GLuint index, GLsizei count, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttribs3svNV (GLuint index, GLsizei count, const GLshort *v);
+GLAPI void APIENTRY glVertexAttribs4dvNV (GLuint index, GLsizei count, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribs4fvNV (GLuint index, GLsizei count, const GLfloat *v);
+GLAPI void APIENTRY glVertexAttribs4svNV (GLuint index, GLsizei count, const GLshort *v);
+GLAPI void APIENTRY glVertexAttribs4ubvNV (GLuint index, GLsizei count, const GLubyte *v);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLboolean (APIENTRYP PFNGLAREPROGRAMSRESIDENTNVPROC) (GLsizei n, const GLuint *programs, GLboolean *residences);
+typedef void (APIENTRYP PFNGLBINDPROGRAMNVPROC) (GLenum target, GLuint id);
+typedef void (APIENTRYP PFNGLDELETEPROGRAMSNVPROC) (GLsizei n, const GLuint *programs);
+typedef void (APIENTRYP PFNGLEXECUTEPROGRAMNVPROC) (GLenum target, GLuint id, const GLfloat *params);
+typedef void (APIENTRYP PFNGLGENPROGRAMSNVPROC) (GLsizei n, GLuint *programs);
+typedef void (APIENTRYP PFNGLGETPROGRAMPARAMETERDVNVPROC) (GLenum target, GLuint index, GLenum pname, GLdouble *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMPARAMETERFVNVPROC) (GLenum target, GLuint index, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMIVNVPROC) (GLuint id, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMSTRINGNVPROC) (GLuint id, GLenum pname, GLubyte *program);
+typedef void (APIENTRYP PFNGLGETTRACKMATRIXIVNVPROC) (GLenum target, GLuint address, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBDVNVPROC) (GLuint index, GLenum pname, GLdouble *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBFVNVPROC) (GLuint index, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIVNVPROC) (GLuint index, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBPOINTERVNVPROC) (GLuint index, GLenum pname, GLvoid* *pointer);
+typedef GLboolean (APIENTRYP PFNGLISPROGRAMNVPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLLOADPROGRAMNVPROC) (GLenum target, GLuint id, GLsizei len, const GLubyte *program);
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETER4DNVPROC) (GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETER4DVNVPROC) (GLenum target, GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETER4FNVPROC) (GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETER4FVNVPROC) (GLenum target, GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETERS4DVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLdouble *v);
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETERS4FVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLfloat *v);
+typedef void (APIENTRYP PFNGLREQUESTRESIDENTPROGRAMSNVPROC) (GLsizei n, const GLuint *programs);
+typedef void (APIENTRYP PFNGLTRACKMATRIXNVPROC) (GLenum target, GLuint address, GLenum matrix, GLenum transform);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERNVPROC) (GLuint index, GLint fsize, GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1DNVPROC) (GLuint index, GLdouble x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1DVNVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1FNVPROC) (GLuint index, GLfloat x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1FVNVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1SNVPROC) (GLuint index, GLshort x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1SVNVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2DNVPROC) (GLuint index, GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2DVNVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2FNVPROC) (GLuint index, GLfloat x, GLfloat y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2FVNVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2SNVPROC) (GLuint index, GLshort x, GLshort y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2SVNVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3DNVPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3DVNVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3FNVPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3FVNVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3SNVPROC) (GLuint index, GLshort x, GLshort y, GLshort z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3SVNVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4DNVPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4DVNVPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4FNVPROC) (GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4FVNVPROC) (GLuint index, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4SNVPROC) (GLuint index, GLshort x, GLshort y, GLshort z, GLshort w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4SVNVPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBNVPROC) (GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4UBVNVPROC) (GLuint index, const GLubyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS1DVNVPROC) (GLuint index, GLsizei count, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS1FVNVPROC) (GLuint index, GLsizei count, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS1SVNVPROC) (GLuint index, GLsizei count, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS2DVNVPROC) (GLuint index, GLsizei count, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS2FVNVPROC) (GLuint index, GLsizei count, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS2SVNVPROC) (GLuint index, GLsizei count, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS3DVNVPROC) (GLuint index, GLsizei count, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS3FVNVPROC) (GLuint index, GLsizei count, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS3SVNVPROC) (GLuint index, GLsizei count, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS4DVNVPROC) (GLuint index, GLsizei count, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS4FVNVPROC) (GLuint index, GLsizei count, const GLfloat *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS4SVNVPROC) (GLuint index, GLsizei count, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS4UBVNVPROC) (GLuint index, GLsizei count, const GLubyte *v);
+#endif
+
+#ifndef GL_SGIX_texture_coordinate_clamp
+#define GL_SGIX_texture_coordinate_clamp 1
+#endif
+
+#ifndef GL_SGIX_scalebias_hint
+#define GL_SGIX_scalebias_hint 1
+#endif
+
+#ifndef GL_OML_interlace
+#define GL_OML_interlace 1
+#endif
+
+#ifndef GL_OML_subsample
+#define GL_OML_subsample 1
+#endif
+
+#ifndef GL_OML_resample
+#define GL_OML_resample 1
+#endif
+
+#ifndef GL_NV_copy_depth_to_color
+#define GL_NV_copy_depth_to_color 1
+#endif
+
+#ifndef GL_ATI_envmap_bumpmap
+#define GL_ATI_envmap_bumpmap 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTexBumpParameterivATI (GLenum pname, const GLint *param);
+GLAPI void APIENTRY glTexBumpParameterfvATI (GLenum pname, const GLfloat *param);
+GLAPI void APIENTRY glGetTexBumpParameterivATI (GLenum pname, GLint *param);
+GLAPI void APIENTRY glGetTexBumpParameterfvATI (GLenum pname, GLfloat *param);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXBUMPPARAMETERIVATIPROC) (GLenum pname, const GLint *param);
+typedef void (APIENTRYP PFNGLTEXBUMPPARAMETERFVATIPROC) (GLenum pname, const GLfloat *param);
+typedef void (APIENTRYP PFNGLGETTEXBUMPPARAMETERIVATIPROC) (GLenum pname, GLint *param);
+typedef void (APIENTRYP PFNGLGETTEXBUMPPARAMETERFVATIPROC) (GLenum pname, GLfloat *param);
+#endif
+
+#ifndef GL_ATI_fragment_shader
+#define GL_ATI_fragment_shader 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLuint APIENTRY glGenFragmentShadersATI (GLuint range);
+GLAPI void APIENTRY glBindFragmentShaderATI (GLuint id);
+GLAPI void APIENTRY glDeleteFragmentShaderATI (GLuint id);
+GLAPI void APIENTRY glBeginFragmentShaderATI (void);
+GLAPI void APIENTRY glEndFragmentShaderATI (void);
+GLAPI void APIENTRY glPassTexCoordATI (GLuint dst, GLuint coord, GLenum swizzle);
+GLAPI void APIENTRY glSampleMapATI (GLuint dst, GLuint interp, GLenum swizzle);
+GLAPI void APIENTRY glColorFragmentOp1ATI (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod);
+GLAPI void APIENTRY glColorFragmentOp2ATI (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod);
+GLAPI void APIENTRY glColorFragmentOp3ATI (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod, GLuint arg3, GLuint arg3Rep, GLuint arg3Mod);
+GLAPI void APIENTRY glAlphaFragmentOp1ATI (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod);
+GLAPI void APIENTRY glAlphaFragmentOp2ATI (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod);
+GLAPI void APIENTRY glAlphaFragmentOp3ATI (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod, GLuint arg3, GLuint arg3Rep, GLuint arg3Mod);
+GLAPI void APIENTRY glSetFragmentShaderConstantATI (GLuint dst, const GLfloat *value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLuint (APIENTRYP PFNGLGENFRAGMENTSHADERSATIPROC) (GLuint range);
+typedef void (APIENTRYP PFNGLBINDFRAGMENTSHADERATIPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLDELETEFRAGMENTSHADERATIPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLBEGINFRAGMENTSHADERATIPROC) (void);
+typedef void (APIENTRYP PFNGLENDFRAGMENTSHADERATIPROC) (void);
+typedef void (APIENTRYP PFNGLPASSTEXCOORDATIPROC) (GLuint dst, GLuint coord, GLenum swizzle);
+typedef void (APIENTRYP PFNGLSAMPLEMAPATIPROC) (GLuint dst, GLuint interp, GLenum swizzle);
+typedef void (APIENTRYP PFNGLCOLORFRAGMENTOP1ATIPROC) (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod);
+typedef void (APIENTRYP PFNGLCOLORFRAGMENTOP2ATIPROC) (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod);
+typedef void (APIENTRYP PFNGLCOLORFRAGMENTOP3ATIPROC) (GLenum op, GLuint dst, GLuint dstMask, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod, GLuint arg3, GLuint arg3Rep, GLuint arg3Mod);
+typedef void (APIENTRYP PFNGLALPHAFRAGMENTOP1ATIPROC) (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod);
+typedef void (APIENTRYP PFNGLALPHAFRAGMENTOP2ATIPROC) (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod);
+typedef void (APIENTRYP PFNGLALPHAFRAGMENTOP3ATIPROC) (GLenum op, GLuint dst, GLuint dstMod, GLuint arg1, GLuint arg1Rep, GLuint arg1Mod, GLuint arg2, GLuint arg2Rep, GLuint arg2Mod, GLuint arg3, GLuint arg3Rep, GLuint arg3Mod);
+typedef void (APIENTRYP PFNGLSETFRAGMENTSHADERCONSTANTATIPROC) (GLuint dst, const GLfloat *value);
+#endif
+
+#ifndef GL_ATI_pn_triangles
+#define GL_ATI_pn_triangles 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPNTrianglesiATI (GLenum pname, GLint param);
+GLAPI void APIENTRY glPNTrianglesfATI (GLenum pname, GLfloat param);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPNTRIANGLESIATIPROC) (GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLPNTRIANGLESFATIPROC) (GLenum pname, GLfloat param);
+#endif
+
+#ifndef GL_ATI_vertex_array_object
+#define GL_ATI_vertex_array_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLuint APIENTRY glNewObjectBufferATI (GLsizei size, const GLvoid *pointer, GLenum usage);
+GLAPI GLboolean APIENTRY glIsObjectBufferATI (GLuint buffer);
+GLAPI void APIENTRY glUpdateObjectBufferATI (GLuint buffer, GLuint offset, GLsizei size, const GLvoid *pointer, GLenum preserve);
+GLAPI void APIENTRY glGetObjectBufferfvATI (GLuint buffer, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetObjectBufferivATI (GLuint buffer, GLenum pname, GLint *params);
+GLAPI void APIENTRY glFreeObjectBufferATI (GLuint buffer);
+GLAPI void APIENTRY glArrayObjectATI (GLenum array, GLint size, GLenum type, GLsizei stride, GLuint buffer, GLuint offset);
+GLAPI void APIENTRY glGetArrayObjectfvATI (GLenum array, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetArrayObjectivATI (GLenum array, GLenum pname, GLint *params);
+GLAPI void APIENTRY glVariantArrayObjectATI (GLuint id, GLenum type, GLsizei stride, GLuint buffer, GLuint offset);
+GLAPI void APIENTRY glGetVariantArrayObjectfvATI (GLuint id, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetVariantArrayObjectivATI (GLuint id, GLenum pname, GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLuint (APIENTRYP PFNGLNEWOBJECTBUFFERATIPROC) (GLsizei size, const GLvoid *pointer, GLenum usage);
+typedef GLboolean (APIENTRYP PFNGLISOBJECTBUFFERATIPROC) (GLuint buffer);
+typedef void (APIENTRYP PFNGLUPDATEOBJECTBUFFERATIPROC) (GLuint buffer, GLuint offset, GLsizei size, const GLvoid *pointer, GLenum preserve);
+typedef void (APIENTRYP PFNGLGETOBJECTBUFFERFVATIPROC) (GLuint buffer, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETOBJECTBUFFERIVATIPROC) (GLuint buffer, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLFREEOBJECTBUFFERATIPROC) (GLuint buffer);
+typedef void (APIENTRYP PFNGLARRAYOBJECTATIPROC) (GLenum array, GLint size, GLenum type, GLsizei stride, GLuint buffer, GLuint offset);
+typedef void (APIENTRYP PFNGLGETARRAYOBJECTFVATIPROC) (GLenum array, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETARRAYOBJECTIVATIPROC) (GLenum array, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLVARIANTARRAYOBJECTATIPROC) (GLuint id, GLenum type, GLsizei stride, GLuint buffer, GLuint offset);
+typedef void (APIENTRYP PFNGLGETVARIANTARRAYOBJECTFVATIPROC) (GLuint id, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETVARIANTARRAYOBJECTIVATIPROC) (GLuint id, GLenum pname, GLint *params);
+#endif
+
+#ifndef GL_EXT_vertex_shader
+#define GL_EXT_vertex_shader 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBeginVertexShaderEXT (void);
+GLAPI void APIENTRY glEndVertexShaderEXT (void);
+GLAPI void APIENTRY glBindVertexShaderEXT (GLuint id);
+GLAPI GLuint APIENTRY glGenVertexShadersEXT (GLuint range);
+GLAPI void APIENTRY glDeleteVertexShaderEXT (GLuint id);
+GLAPI void APIENTRY glShaderOp1EXT (GLenum op, GLuint res, GLuint arg1);
+GLAPI void APIENTRY glShaderOp2EXT (GLenum op, GLuint res, GLuint arg1, GLuint arg2);
+GLAPI void APIENTRY glShaderOp3EXT (GLenum op, GLuint res, GLuint arg1, GLuint arg2, GLuint arg3);
+GLAPI void APIENTRY glSwizzleEXT (GLuint res, GLuint in, GLenum outX, GLenum outY, GLenum outZ, GLenum outW);
+GLAPI void APIENTRY glWriteMaskEXT (GLuint res, GLuint in, GLenum outX, GLenum outY, GLenum outZ, GLenum outW);
+GLAPI void APIENTRY glInsertComponentEXT (GLuint res, GLuint src, GLuint num);
+GLAPI void APIENTRY glExtractComponentEXT (GLuint res, GLuint src, GLuint num);
+GLAPI GLuint APIENTRY glGenSymbolsEXT (GLenum datatype, GLenum storagetype, GLenum range, GLuint components);
+GLAPI void APIENTRY glSetInvariantEXT (GLuint id, GLenum type, const GLvoid *addr);
+GLAPI void APIENTRY glSetLocalConstantEXT (GLuint id, GLenum type, const GLvoid *addr);
+GLAPI void APIENTRY glVariantbvEXT (GLuint id, const GLbyte *addr);
+GLAPI void APIENTRY glVariantsvEXT (GLuint id, const GLshort *addr);
+GLAPI void APIENTRY glVariantivEXT (GLuint id, const GLint *addr);
+GLAPI void APIENTRY glVariantfvEXT (GLuint id, const GLfloat *addr);
+GLAPI void APIENTRY glVariantdvEXT (GLuint id, const GLdouble *addr);
+GLAPI void APIENTRY glVariantubvEXT (GLuint id, const GLubyte *addr);
+GLAPI void APIENTRY glVariantusvEXT (GLuint id, const GLushort *addr);
+GLAPI void APIENTRY glVariantuivEXT (GLuint id, const GLuint *addr);
+GLAPI void APIENTRY glVariantPointerEXT (GLuint id, GLenum type, GLuint stride, const GLvoid *addr);
+GLAPI void APIENTRY glEnableVariantClientStateEXT (GLuint id);
+GLAPI void APIENTRY glDisableVariantClientStateEXT (GLuint id);
+GLAPI GLuint APIENTRY glBindLightParameterEXT (GLenum light, GLenum value);
+GLAPI GLuint APIENTRY glBindMaterialParameterEXT (GLenum face, GLenum value);
+GLAPI GLuint APIENTRY glBindTexGenParameterEXT (GLenum unit, GLenum coord, GLenum value);
+GLAPI GLuint APIENTRY glBindTextureUnitParameterEXT (GLenum unit, GLenum value);
+GLAPI GLuint APIENTRY glBindParameterEXT (GLenum value);
+GLAPI GLboolean APIENTRY glIsVariantEnabledEXT (GLuint id, GLenum cap);
+GLAPI void APIENTRY glGetVariantBooleanvEXT (GLuint id, GLenum value, GLboolean *data);
+GLAPI void APIENTRY glGetVariantIntegervEXT (GLuint id, GLenum value, GLint *data);
+GLAPI void APIENTRY glGetVariantFloatvEXT (GLuint id, GLenum value, GLfloat *data);
+GLAPI void APIENTRY glGetVariantPointervEXT (GLuint id, GLenum value, GLvoid* *data);
+GLAPI void APIENTRY glGetInvariantBooleanvEXT (GLuint id, GLenum value, GLboolean *data);
+GLAPI void APIENTRY glGetInvariantIntegervEXT (GLuint id, GLenum value, GLint *data);
+GLAPI void APIENTRY glGetInvariantFloatvEXT (GLuint id, GLenum value, GLfloat *data);
+GLAPI void APIENTRY glGetLocalConstantBooleanvEXT (GLuint id, GLenum value, GLboolean *data);
+GLAPI void APIENTRY glGetLocalConstantIntegervEXT (GLuint id, GLenum value, GLint *data);
+GLAPI void APIENTRY glGetLocalConstantFloatvEXT (GLuint id, GLenum value, GLfloat *data);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBEGINVERTEXSHADEREXTPROC) (void);
+typedef void (APIENTRYP PFNGLENDVERTEXSHADEREXTPROC) (void);
+typedef void (APIENTRYP PFNGLBINDVERTEXSHADEREXTPROC) (GLuint id);
+typedef GLuint (APIENTRYP PFNGLGENVERTEXSHADERSEXTPROC) (GLuint range);
+typedef void (APIENTRYP PFNGLDELETEVERTEXSHADEREXTPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLSHADEROP1EXTPROC) (GLenum op, GLuint res, GLuint arg1);
+typedef void (APIENTRYP PFNGLSHADEROP2EXTPROC) (GLenum op, GLuint res, GLuint arg1, GLuint arg2);
+typedef void (APIENTRYP PFNGLSHADEROP3EXTPROC) (GLenum op, GLuint res, GLuint arg1, GLuint arg2, GLuint arg3);
+typedef void (APIENTRYP PFNGLSWIZZLEEXTPROC) (GLuint res, GLuint in, GLenum outX, GLenum outY, GLenum outZ, GLenum outW);
+typedef void (APIENTRYP PFNGLWRITEMASKEXTPROC) (GLuint res, GLuint in, GLenum outX, GLenum outY, GLenum outZ, GLenum outW);
+typedef void (APIENTRYP PFNGLINSERTCOMPONENTEXTPROC) (GLuint res, GLuint src, GLuint num);
+typedef void (APIENTRYP PFNGLEXTRACTCOMPONENTEXTPROC) (GLuint res, GLuint src, GLuint num);
+typedef GLuint (APIENTRYP PFNGLGENSYMBOLSEXTPROC) (GLenum datatype, GLenum storagetype, GLenum range, GLuint components);
+typedef void (APIENTRYP PFNGLSETINVARIANTEXTPROC) (GLuint id, GLenum type, const GLvoid *addr);
+typedef void (APIENTRYP PFNGLSETLOCALCONSTANTEXTPROC) (GLuint id, GLenum type, const GLvoid *addr);
+typedef void (APIENTRYP PFNGLVARIANTBVEXTPROC) (GLuint id, const GLbyte *addr);
+typedef void (APIENTRYP PFNGLVARIANTSVEXTPROC) (GLuint id, const GLshort *addr);
+typedef void (APIENTRYP PFNGLVARIANTIVEXTPROC) (GLuint id, const GLint *addr);
+typedef void (APIENTRYP PFNGLVARIANTFVEXTPROC) (GLuint id, const GLfloat *addr);
+typedef void (APIENTRYP PFNGLVARIANTDVEXTPROC) (GLuint id, const GLdouble *addr);
+typedef void (APIENTRYP PFNGLVARIANTUBVEXTPROC) (GLuint id, const GLubyte *addr);
+typedef void (APIENTRYP PFNGLVARIANTUSVEXTPROC) (GLuint id, const GLushort *addr);
+typedef void (APIENTRYP PFNGLVARIANTUIVEXTPROC) (GLuint id, const GLuint *addr);
+typedef void (APIENTRYP PFNGLVARIANTPOINTEREXTPROC) (GLuint id, GLenum type, GLuint stride, const GLvoid *addr);
+typedef void (APIENTRYP PFNGLENABLEVARIANTCLIENTSTATEEXTPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLDISABLEVARIANTCLIENTSTATEEXTPROC) (GLuint id);
+typedef GLuint (APIENTRYP PFNGLBINDLIGHTPARAMETEREXTPROC) (GLenum light, GLenum value);
+typedef GLuint (APIENTRYP PFNGLBINDMATERIALPARAMETEREXTPROC) (GLenum face, GLenum value);
+typedef GLuint (APIENTRYP PFNGLBINDTEXGENPARAMETEREXTPROC) (GLenum unit, GLenum coord, GLenum value);
+typedef GLuint (APIENTRYP PFNGLBINDTEXTUREUNITPARAMETEREXTPROC) (GLenum unit, GLenum value);
+typedef GLuint (APIENTRYP PFNGLBINDPARAMETEREXTPROC) (GLenum value);
+typedef GLboolean (APIENTRYP PFNGLISVARIANTENABLEDEXTPROC) (GLuint id, GLenum cap);
+typedef void (APIENTRYP PFNGLGETVARIANTBOOLEANVEXTPROC) (GLuint id, GLenum value, GLboolean *data);
+typedef void (APIENTRYP PFNGLGETVARIANTINTEGERVEXTPROC) (GLuint id, GLenum value, GLint *data);
+typedef void (APIENTRYP PFNGLGETVARIANTFLOATVEXTPROC) (GLuint id, GLenum value, GLfloat *data);
+typedef void (APIENTRYP PFNGLGETVARIANTPOINTERVEXTPROC) (GLuint id, GLenum value, GLvoid* *data);
+typedef void (APIENTRYP PFNGLGETINVARIANTBOOLEANVEXTPROC) (GLuint id, GLenum value, GLboolean *data);
+typedef void (APIENTRYP PFNGLGETINVARIANTINTEGERVEXTPROC) (GLuint id, GLenum value, GLint *data);
+typedef void (APIENTRYP PFNGLGETINVARIANTFLOATVEXTPROC) (GLuint id, GLenum value, GLfloat *data);
+typedef void (APIENTRYP PFNGLGETLOCALCONSTANTBOOLEANVEXTPROC) (GLuint id, GLenum value, GLboolean *data);
+typedef void (APIENTRYP PFNGLGETLOCALCONSTANTINTEGERVEXTPROC) (GLuint id, GLenum value, GLint *data);
+typedef void (APIENTRYP PFNGLGETLOCALCONSTANTFLOATVEXTPROC) (GLuint id, GLenum value, GLfloat *data);
+#endif
+
+#ifndef GL_ATI_vertex_streams
+#define GL_ATI_vertex_streams 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexStream1sATI (GLenum stream, GLshort x);
+GLAPI void APIENTRY glVertexStream1svATI (GLenum stream, const GLshort *coords);
+GLAPI void APIENTRY glVertexStream1iATI (GLenum stream, GLint x);
+GLAPI void APIENTRY glVertexStream1ivATI (GLenum stream, const GLint *coords);
+GLAPI void APIENTRY glVertexStream1fATI (GLenum stream, GLfloat x);
+GLAPI void APIENTRY glVertexStream1fvATI (GLenum stream, const GLfloat *coords);
+GLAPI void APIENTRY glVertexStream1dATI (GLenum stream, GLdouble x);
+GLAPI void APIENTRY glVertexStream1dvATI (GLenum stream, const GLdouble *coords);
+GLAPI void APIENTRY glVertexStream2sATI (GLenum stream, GLshort x, GLshort y);
+GLAPI void APIENTRY glVertexStream2svATI (GLenum stream, const GLshort *coords);
+GLAPI void APIENTRY glVertexStream2iATI (GLenum stream, GLint x, GLint y);
+GLAPI void APIENTRY glVertexStream2ivATI (GLenum stream, const GLint *coords);
+GLAPI void APIENTRY glVertexStream2fATI (GLenum stream, GLfloat x, GLfloat y);
+GLAPI void APIENTRY glVertexStream2fvATI (GLenum stream, const GLfloat *coords);
+GLAPI void APIENTRY glVertexStream2dATI (GLenum stream, GLdouble x, GLdouble y);
+GLAPI void APIENTRY glVertexStream2dvATI (GLenum stream, const GLdouble *coords);
+GLAPI void APIENTRY glVertexStream3sATI (GLenum stream, GLshort x, GLshort y, GLshort z);
+GLAPI void APIENTRY glVertexStream3svATI (GLenum stream, const GLshort *coords);
+GLAPI void APIENTRY glVertexStream3iATI (GLenum stream, GLint x, GLint y, GLint z);
+GLAPI void APIENTRY glVertexStream3ivATI (GLenum stream, const GLint *coords);
+GLAPI void APIENTRY glVertexStream3fATI (GLenum stream, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glVertexStream3fvATI (GLenum stream, const GLfloat *coords);
+GLAPI void APIENTRY glVertexStream3dATI (GLenum stream, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glVertexStream3dvATI (GLenum stream, const GLdouble *coords);
+GLAPI void APIENTRY glVertexStream4sATI (GLenum stream, GLshort x, GLshort y, GLshort z, GLshort w);
+GLAPI void APIENTRY glVertexStream4svATI (GLenum stream, const GLshort *coords);
+GLAPI void APIENTRY glVertexStream4iATI (GLenum stream, GLint x, GLint y, GLint z, GLint w);
+GLAPI void APIENTRY glVertexStream4ivATI (GLenum stream, const GLint *coords);
+GLAPI void APIENTRY glVertexStream4fATI (GLenum stream, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glVertexStream4fvATI (GLenum stream, const GLfloat *coords);
+GLAPI void APIENTRY glVertexStream4dATI (GLenum stream, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glVertexStream4dvATI (GLenum stream, const GLdouble *coords);
+GLAPI void APIENTRY glNormalStream3bATI (GLenum stream, GLbyte nx, GLbyte ny, GLbyte nz);
+GLAPI void APIENTRY glNormalStream3bvATI (GLenum stream, const GLbyte *coords);
+GLAPI void APIENTRY glNormalStream3sATI (GLenum stream, GLshort nx, GLshort ny, GLshort nz);
+GLAPI void APIENTRY glNormalStream3svATI (GLenum stream, const GLshort *coords);
+GLAPI void APIENTRY glNormalStream3iATI (GLenum stream, GLint nx, GLint ny, GLint nz);
+GLAPI void APIENTRY glNormalStream3ivATI (GLenum stream, const GLint *coords);
+GLAPI void APIENTRY glNormalStream3fATI (GLenum stream, GLfloat nx, GLfloat ny, GLfloat nz);
+GLAPI void APIENTRY glNormalStream3fvATI (GLenum stream, const GLfloat *coords);
+GLAPI void APIENTRY glNormalStream3dATI (GLenum stream, GLdouble nx, GLdouble ny, GLdouble nz);
+GLAPI void APIENTRY glNormalStream3dvATI (GLenum stream, const GLdouble *coords);
+GLAPI void APIENTRY glClientActiveVertexStreamATI (GLenum stream);
+GLAPI void APIENTRY glVertexBlendEnviATI (GLenum pname, GLint param);
+GLAPI void APIENTRY glVertexBlendEnvfATI (GLenum pname, GLfloat param);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXSTREAM1SATIPROC) (GLenum stream, GLshort x);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM1SVATIPROC) (GLenum stream, const GLshort *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM1IATIPROC) (GLenum stream, GLint x);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM1IVATIPROC) (GLenum stream, const GLint *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM1FATIPROC) (GLenum stream, GLfloat x);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM1FVATIPROC) (GLenum stream, const GLfloat *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM1DATIPROC) (GLenum stream, GLdouble x);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM1DVATIPROC) (GLenum stream, const GLdouble *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM2SATIPROC) (GLenum stream, GLshort x, GLshort y);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM2SVATIPROC) (GLenum stream, const GLshort *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM2IATIPROC) (GLenum stream, GLint x, GLint y);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM2IVATIPROC) (GLenum stream, const GLint *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM2FATIPROC) (GLenum stream, GLfloat x, GLfloat y);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM2FVATIPROC) (GLenum stream, const GLfloat *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM2DATIPROC) (GLenum stream, GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM2DVATIPROC) (GLenum stream, const GLdouble *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM3SATIPROC) (GLenum stream, GLshort x, GLshort y, GLshort z);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM3SVATIPROC) (GLenum stream, const GLshort *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM3IATIPROC) (GLenum stream, GLint x, GLint y, GLint z);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM3IVATIPROC) (GLenum stream, const GLint *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM3FATIPROC) (GLenum stream, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM3FVATIPROC) (GLenum stream, const GLfloat *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM3DATIPROC) (GLenum stream, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM3DVATIPROC) (GLenum stream, const GLdouble *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM4SATIPROC) (GLenum stream, GLshort x, GLshort y, GLshort z, GLshort w);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM4SVATIPROC) (GLenum stream, const GLshort *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM4IATIPROC) (GLenum stream, GLint x, GLint y, GLint z, GLint w);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM4IVATIPROC) (GLenum stream, const GLint *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM4FATIPROC) (GLenum stream, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM4FVATIPROC) (GLenum stream, const GLfloat *coords);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM4DATIPROC) (GLenum stream, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLVERTEXSTREAM4DVATIPROC) (GLenum stream, const GLdouble *coords);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3BATIPROC) (GLenum stream, GLbyte nx, GLbyte ny, GLbyte nz);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3BVATIPROC) (GLenum stream, const GLbyte *coords);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3SATIPROC) (GLenum stream, GLshort nx, GLshort ny, GLshort nz);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3SVATIPROC) (GLenum stream, const GLshort *coords);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3IATIPROC) (GLenum stream, GLint nx, GLint ny, GLint nz);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3IVATIPROC) (GLenum stream, const GLint *coords);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3FATIPROC) (GLenum stream, GLfloat nx, GLfloat ny, GLfloat nz);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3FVATIPROC) (GLenum stream, const GLfloat *coords);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3DATIPROC) (GLenum stream, GLdouble nx, GLdouble ny, GLdouble nz);
+typedef void (APIENTRYP PFNGLNORMALSTREAM3DVATIPROC) (GLenum stream, const GLdouble *coords);
+typedef void (APIENTRYP PFNGLCLIENTACTIVEVERTEXSTREAMATIPROC) (GLenum stream);
+typedef void (APIENTRYP PFNGLVERTEXBLENDENVIATIPROC) (GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLVERTEXBLENDENVFATIPROC) (GLenum pname, GLfloat param);
+#endif
+
+#ifndef GL_ATI_element_array
+#define GL_ATI_element_array 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glElementPointerATI (GLenum type, const GLvoid *pointer);
+GLAPI void APIENTRY glDrawElementArrayATI (GLenum mode, GLsizei count);
+GLAPI void APIENTRY glDrawRangeElementArrayATI (GLenum mode, GLuint start, GLuint end, GLsizei count);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLELEMENTPOINTERATIPROC) (GLenum type, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLDRAWELEMENTARRAYATIPROC) (GLenum mode, GLsizei count);
+typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTARRAYATIPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count);
+#endif
+
+#ifndef GL_SUN_mesh_array
+#define GL_SUN_mesh_array 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawMeshArraysSUN (GLenum mode, GLint first, GLsizei count, GLsizei width);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWMESHARRAYSSUNPROC) (GLenum mode, GLint first, GLsizei count, GLsizei width);
+#endif
+
+#ifndef GL_SUN_slice_accum
+#define GL_SUN_slice_accum 1
+#endif
+
+#ifndef GL_NV_multisample_filter_hint
+#define GL_NV_multisample_filter_hint 1
+#endif
+
+#ifndef GL_NV_depth_clamp
+#define GL_NV_depth_clamp 1
+#endif
+
+#ifndef GL_NV_occlusion_query
+#define GL_NV_occlusion_query 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGenOcclusionQueriesNV (GLsizei n, GLuint *ids);
+GLAPI void APIENTRY glDeleteOcclusionQueriesNV (GLsizei n, const GLuint *ids);
+GLAPI GLboolean APIENTRY glIsOcclusionQueryNV (GLuint id);
+GLAPI void APIENTRY glBeginOcclusionQueryNV (GLuint id);
+GLAPI void APIENTRY glEndOcclusionQueryNV (void);
+GLAPI void APIENTRY glGetOcclusionQueryivNV (GLuint id, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetOcclusionQueryuivNV (GLuint id, GLenum pname, GLuint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGENOCCLUSIONQUERIESNVPROC) (GLsizei n, GLuint *ids);
+typedef void (APIENTRYP PFNGLDELETEOCCLUSIONQUERIESNVPROC) (GLsizei n, const GLuint *ids);
+typedef GLboolean (APIENTRYP PFNGLISOCCLUSIONQUERYNVPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLBEGINOCCLUSIONQUERYNVPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLENDOCCLUSIONQUERYNVPROC) (void);
+typedef void (APIENTRYP PFNGLGETOCCLUSIONQUERYIVNVPROC) (GLuint id, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETOCCLUSIONQUERYUIVNVPROC) (GLuint id, GLenum pname, GLuint *params);
+#endif
+
+#ifndef GL_NV_point_sprite
+#define GL_NV_point_sprite 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPointParameteriNV (GLenum pname, GLint param);
+GLAPI void APIENTRY glPointParameterivNV (GLenum pname, const GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPOINTPARAMETERINVPROC) (GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLPOINTPARAMETERIVNVPROC) (GLenum pname, const GLint *params);
+#endif
+
+#ifndef GL_NV_texture_shader3
+#define GL_NV_texture_shader3 1
+#endif
+
+#ifndef GL_NV_vertex_program1_1
+#define GL_NV_vertex_program1_1 1
+#endif
+
+#ifndef GL_EXT_shadow_funcs
+#define GL_EXT_shadow_funcs 1
+#endif
+
+#ifndef GL_EXT_stencil_two_side
+#define GL_EXT_stencil_two_side 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glActiveStencilFaceEXT (GLenum face);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLACTIVESTENCILFACEEXTPROC) (GLenum face);
+#endif
+
+#ifndef GL_ATI_text_fragment_shader
+#define GL_ATI_text_fragment_shader 1
+#endif
+
+#ifndef GL_APPLE_client_storage
+#define GL_APPLE_client_storage 1
+#endif
+
+#ifndef GL_APPLE_element_array
+#define GL_APPLE_element_array 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glElementPointerAPPLE (GLenum type, const GLvoid *pointer);
+GLAPI void APIENTRY glDrawElementArrayAPPLE (GLenum mode, GLint first, GLsizei count);
+GLAPI void APIENTRY glDrawRangeElementArrayAPPLE (GLenum mode, GLuint start, GLuint end, GLint first, GLsizei count);
+GLAPI void APIENTRY glMultiDrawElementArrayAPPLE (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
+GLAPI void APIENTRY glMultiDrawRangeElementArrayAPPLE (GLenum mode, GLuint start, GLuint end, const GLint *first, const GLsizei *count, GLsizei primcount);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLELEMENTPOINTERAPPLEPROC) (GLenum type, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLDRAWELEMENTARRAYAPPLEPROC) (GLenum mode, GLint first, GLsizei count);
+typedef void (APIENTRYP PFNGLDRAWRANGEELEMENTARRAYAPPLEPROC) (GLenum mode, GLuint start, GLuint end, GLint first, GLsizei count);
+typedef void (APIENTRYP PFNGLMULTIDRAWELEMENTARRAYAPPLEPROC) (GLenum mode, const GLint *first, const GLsizei *count, GLsizei primcount);
+typedef void (APIENTRYP PFNGLMULTIDRAWRANGEELEMENTARRAYAPPLEPROC) (GLenum mode, GLuint start, GLuint end, const GLint *first, const GLsizei *count, GLsizei primcount);
+#endif
+
+#ifndef GL_APPLE_fence
+#define GL_APPLE_fence 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGenFencesAPPLE (GLsizei n, GLuint *fences);
+GLAPI void APIENTRY glDeleteFencesAPPLE (GLsizei n, const GLuint *fences);
+GLAPI void APIENTRY glSetFenceAPPLE (GLuint fence);
+GLAPI GLboolean APIENTRY glIsFenceAPPLE (GLuint fence);
+GLAPI GLboolean APIENTRY glTestFenceAPPLE (GLuint fence);
+GLAPI void APIENTRY glFinishFenceAPPLE (GLuint fence);
+GLAPI GLboolean APIENTRY glTestObjectAPPLE (GLenum object, GLuint name);
+GLAPI void APIENTRY glFinishObjectAPPLE (GLenum object, GLint name);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGENFENCESAPPLEPROC) (GLsizei n, GLuint *fences);
+typedef void (APIENTRYP PFNGLDELETEFENCESAPPLEPROC) (GLsizei n, const GLuint *fences);
+typedef void (APIENTRYP PFNGLSETFENCEAPPLEPROC) (GLuint fence);
+typedef GLboolean (APIENTRYP PFNGLISFENCEAPPLEPROC) (GLuint fence);
+typedef GLboolean (APIENTRYP PFNGLTESTFENCEAPPLEPROC) (GLuint fence);
+typedef void (APIENTRYP PFNGLFINISHFENCEAPPLEPROC) (GLuint fence);
+typedef GLboolean (APIENTRYP PFNGLTESTOBJECTAPPLEPROC) (GLenum object, GLuint name);
+typedef void (APIENTRYP PFNGLFINISHOBJECTAPPLEPROC) (GLenum object, GLint name);
+#endif
+
+#ifndef GL_APPLE_vertex_array_object
+#define GL_APPLE_vertex_array_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBindVertexArrayAPPLE (GLuint array);
+GLAPI void APIENTRY glDeleteVertexArraysAPPLE (GLsizei n, const GLuint *arrays);
+GLAPI void APIENTRY glGenVertexArraysAPPLE (GLsizei n, GLuint *arrays);
+GLAPI GLboolean APIENTRY glIsVertexArrayAPPLE (GLuint array);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBINDVERTEXARRAYAPPLEPROC) (GLuint array);
+typedef void (APIENTRYP PFNGLDELETEVERTEXARRAYSAPPLEPROC) (GLsizei n, const GLuint *arrays);
+typedef void (APIENTRYP PFNGLGENVERTEXARRAYSAPPLEPROC) (GLsizei n, GLuint *arrays);
+typedef GLboolean (APIENTRYP PFNGLISVERTEXARRAYAPPLEPROC) (GLuint array);
+#endif
+
+#ifndef GL_APPLE_vertex_array_range
+#define GL_APPLE_vertex_array_range 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexArrayRangeAPPLE (GLsizei length, GLvoid *pointer);
+GLAPI void APIENTRY glFlushVertexArrayRangeAPPLE (GLsizei length, GLvoid *pointer);
+GLAPI void APIENTRY glVertexArrayParameteriAPPLE (GLenum pname, GLint param);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXARRAYRANGEAPPLEPROC) (GLsizei length, GLvoid *pointer);
+typedef void (APIENTRYP PFNGLFLUSHVERTEXARRAYRANGEAPPLEPROC) (GLsizei length, GLvoid *pointer);
+typedef void (APIENTRYP PFNGLVERTEXARRAYPARAMETERIAPPLEPROC) (GLenum pname, GLint param);
+#endif
+
+#ifndef GL_APPLE_ycbcr_422
+#define GL_APPLE_ycbcr_422 1
+#endif
+
+#ifndef GL_S3_s3tc
+#define GL_S3_s3tc 1
+#endif
+
+#ifndef GL_ATI_draw_buffers
+#define GL_ATI_draw_buffers 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawBuffersATI (GLsizei n, const GLenum *bufs);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWBUFFERSATIPROC) (GLsizei n, const GLenum *bufs);
+#endif
+
+#ifndef GL_ATI_pixel_format_float
+#define GL_ATI_pixel_format_float 1
+/* This is really a WGL extension, but defines some associated GL enums.
+ * ATI does not export "GL_ATI_pixel_format_float" in the GL_EXTENSIONS string.
+ */
+#endif
+
+#ifndef GL_ATI_texture_env_combine3
+#define GL_ATI_texture_env_combine3 1
+#endif
+
+#ifndef GL_ATI_texture_float
+#define GL_ATI_texture_float 1
+#endif
+
+#ifndef GL_NV_float_buffer
+#define GL_NV_float_buffer 1
+#endif
+
+#ifndef GL_NV_fragment_program
+#define GL_NV_fragment_program 1
+/* Some NV_fragment_program entry points are shared with ARB_vertex_program. */
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProgramNamedParameter4fNV (GLuint id, GLsizei len, const GLubyte *name, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glProgramNamedParameter4dNV (GLuint id, GLsizei len, const GLubyte *name, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glProgramNamedParameter4fvNV (GLuint id, GLsizei len, const GLubyte *name, const GLfloat *v);
+GLAPI void APIENTRY glProgramNamedParameter4dvNV (GLuint id, GLsizei len, const GLubyte *name, const GLdouble *v);
+GLAPI void APIENTRY glGetProgramNamedParameterfvNV (GLuint id, GLsizei len, const GLubyte *name, GLfloat *params);
+GLAPI void APIENTRY glGetProgramNamedParameterdvNV (GLuint id, GLsizei len, const GLubyte *name, GLdouble *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROGRAMNAMEDPARAMETER4FNVPROC) (GLuint id, GLsizei len, const GLubyte *name, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLPROGRAMNAMEDPARAMETER4DNVPROC) (GLuint id, GLsizei len, const GLubyte *name, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLPROGRAMNAMEDPARAMETER4FVNVPROC) (GLuint id, GLsizei len, const GLubyte *name, const GLfloat *v);
+typedef void (APIENTRYP PFNGLPROGRAMNAMEDPARAMETER4DVNVPROC) (GLuint id, GLsizei len, const GLubyte *name, const GLdouble *v);
+typedef void (APIENTRYP PFNGLGETPROGRAMNAMEDPARAMETERFVNVPROC) (GLuint id, GLsizei len, const GLubyte *name, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMNAMEDPARAMETERDVNVPROC) (GLuint id, GLsizei len, const GLubyte *name, GLdouble *params);
+#endif
+
+#ifndef GL_NV_half_float
+#define GL_NV_half_float 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertex2hNV (GLhalfNV x, GLhalfNV y);
+GLAPI void APIENTRY glVertex2hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glVertex3hNV (GLhalfNV x, GLhalfNV y, GLhalfNV z);
+GLAPI void APIENTRY glVertex3hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glVertex4hNV (GLhalfNV x, GLhalfNV y, GLhalfNV z, GLhalfNV w);
+GLAPI void APIENTRY glVertex4hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glNormal3hNV (GLhalfNV nx, GLhalfNV ny, GLhalfNV nz);
+GLAPI void APIENTRY glNormal3hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glColor3hNV (GLhalfNV red, GLhalfNV green, GLhalfNV blue);
+GLAPI void APIENTRY glColor3hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glColor4hNV (GLhalfNV red, GLhalfNV green, GLhalfNV blue, GLhalfNV alpha);
+GLAPI void APIENTRY glColor4hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glTexCoord1hNV (GLhalfNV s);
+GLAPI void APIENTRY glTexCoord1hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glTexCoord2hNV (GLhalfNV s, GLhalfNV t);
+GLAPI void APIENTRY glTexCoord2hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glTexCoord3hNV (GLhalfNV s, GLhalfNV t, GLhalfNV r);
+GLAPI void APIENTRY glTexCoord3hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glTexCoord4hNV (GLhalfNV s, GLhalfNV t, GLhalfNV r, GLhalfNV q);
+GLAPI void APIENTRY glTexCoord4hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glMultiTexCoord1hNV (GLenum target, GLhalfNV s);
+GLAPI void APIENTRY glMultiTexCoord1hvNV (GLenum target, const GLhalfNV *v);
+GLAPI void APIENTRY glMultiTexCoord2hNV (GLenum target, GLhalfNV s, GLhalfNV t);
+GLAPI void APIENTRY glMultiTexCoord2hvNV (GLenum target, const GLhalfNV *v);
+GLAPI void APIENTRY glMultiTexCoord3hNV (GLenum target, GLhalfNV s, GLhalfNV t, GLhalfNV r);
+GLAPI void APIENTRY glMultiTexCoord3hvNV (GLenum target, const GLhalfNV *v);
+GLAPI void APIENTRY glMultiTexCoord4hNV (GLenum target, GLhalfNV s, GLhalfNV t, GLhalfNV r, GLhalfNV q);
+GLAPI void APIENTRY glMultiTexCoord4hvNV (GLenum target, const GLhalfNV *v);
+GLAPI void APIENTRY glFogCoordhNV (GLhalfNV fog);
+GLAPI void APIENTRY glFogCoordhvNV (const GLhalfNV *fog);
+GLAPI void APIENTRY glSecondaryColor3hNV (GLhalfNV red, GLhalfNV green, GLhalfNV blue);
+GLAPI void APIENTRY glSecondaryColor3hvNV (const GLhalfNV *v);
+GLAPI void APIENTRY glVertexWeighthNV (GLhalfNV weight);
+GLAPI void APIENTRY glVertexWeighthvNV (const GLhalfNV *weight);
+GLAPI void APIENTRY glVertexAttrib1hNV (GLuint index, GLhalfNV x);
+GLAPI void APIENTRY glVertexAttrib1hvNV (GLuint index, const GLhalfNV *v);
+GLAPI void APIENTRY glVertexAttrib2hNV (GLuint index, GLhalfNV x, GLhalfNV y);
+GLAPI void APIENTRY glVertexAttrib2hvNV (GLuint index, const GLhalfNV *v);
+GLAPI void APIENTRY glVertexAttrib3hNV (GLuint index, GLhalfNV x, GLhalfNV y, GLhalfNV z);
+GLAPI void APIENTRY glVertexAttrib3hvNV (GLuint index, const GLhalfNV *v);
+GLAPI void APIENTRY glVertexAttrib4hNV (GLuint index, GLhalfNV x, GLhalfNV y, GLhalfNV z, GLhalfNV w);
+GLAPI void APIENTRY glVertexAttrib4hvNV (GLuint index, const GLhalfNV *v);
+GLAPI void APIENTRY glVertexAttribs1hvNV (GLuint index, GLsizei n, const GLhalfNV *v);
+GLAPI void APIENTRY glVertexAttribs2hvNV (GLuint index, GLsizei n, const GLhalfNV *v);
+GLAPI void APIENTRY glVertexAttribs3hvNV (GLuint index, GLsizei n, const GLhalfNV *v);
+GLAPI void APIENTRY glVertexAttribs4hvNV (GLuint index, GLsizei n, const GLhalfNV *v);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEX2HNVPROC) (GLhalfNV x, GLhalfNV y);
+typedef void (APIENTRYP PFNGLVERTEX2HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEX3HNVPROC) (GLhalfNV x, GLhalfNV y, GLhalfNV z);
+typedef void (APIENTRYP PFNGLVERTEX3HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEX4HNVPROC) (GLhalfNV x, GLhalfNV y, GLhalfNV z, GLhalfNV w);
+typedef void (APIENTRYP PFNGLVERTEX4HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLNORMAL3HNVPROC) (GLhalfNV nx, GLhalfNV ny, GLhalfNV nz);
+typedef void (APIENTRYP PFNGLNORMAL3HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLCOLOR3HNVPROC) (GLhalfNV red, GLhalfNV green, GLhalfNV blue);
+typedef void (APIENTRYP PFNGLCOLOR3HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLCOLOR4HNVPROC) (GLhalfNV red, GLhalfNV green, GLhalfNV blue, GLhalfNV alpha);
+typedef void (APIENTRYP PFNGLCOLOR4HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLTEXCOORD1HNVPROC) (GLhalfNV s);
+typedef void (APIENTRYP PFNGLTEXCOORD1HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLTEXCOORD2HNVPROC) (GLhalfNV s, GLhalfNV t);
+typedef void (APIENTRYP PFNGLTEXCOORD2HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLTEXCOORD3HNVPROC) (GLhalfNV s, GLhalfNV t, GLhalfNV r);
+typedef void (APIENTRYP PFNGLTEXCOORD3HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLTEXCOORD4HNVPROC) (GLhalfNV s, GLhalfNV t, GLhalfNV r, GLhalfNV q);
+typedef void (APIENTRYP PFNGLTEXCOORD4HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1HNVPROC) (GLenum target, GLhalfNV s);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD1HVNVPROC) (GLenum target, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2HNVPROC) (GLenum target, GLhalfNV s, GLhalfNV t);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD2HVNVPROC) (GLenum target, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3HNVPROC) (GLenum target, GLhalfNV s, GLhalfNV t, GLhalfNV r);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD3HVNVPROC) (GLenum target, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4HNVPROC) (GLenum target, GLhalfNV s, GLhalfNV t, GLhalfNV r, GLhalfNV q);
+typedef void (APIENTRYP PFNGLMULTITEXCOORD4HVNVPROC) (GLenum target, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLFOGCOORDHNVPROC) (GLhalfNV fog);
+typedef void (APIENTRYP PFNGLFOGCOORDHVNVPROC) (const GLhalfNV *fog);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3HNVPROC) (GLhalfNV red, GLhalfNV green, GLhalfNV blue);
+typedef void (APIENTRYP PFNGLSECONDARYCOLOR3HVNVPROC) (const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEXWEIGHTHNVPROC) (GLhalfNV weight);
+typedef void (APIENTRYP PFNGLVERTEXWEIGHTHVNVPROC) (const GLhalfNV *weight);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1HNVPROC) (GLuint index, GLhalfNV x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB1HVNVPROC) (GLuint index, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2HNVPROC) (GLuint index, GLhalfNV x, GLhalfNV y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB2HVNVPROC) (GLuint index, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3HNVPROC) (GLuint index, GLhalfNV x, GLhalfNV y, GLhalfNV z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB3HVNVPROC) (GLuint index, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4HNVPROC) (GLuint index, GLhalfNV x, GLhalfNV y, GLhalfNV z, GLhalfNV w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIB4HVNVPROC) (GLuint index, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS1HVNVPROC) (GLuint index, GLsizei n, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS2HVNVPROC) (GLuint index, GLsizei n, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS3HVNVPROC) (GLuint index, GLsizei n, const GLhalfNV *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBS4HVNVPROC) (GLuint index, GLsizei n, const GLhalfNV *v);
+#endif
+
+#ifndef GL_NV_pixel_data_range
+#define GL_NV_pixel_data_range 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPixelDataRangeNV (GLenum target, GLsizei length, GLvoid *pointer);
+GLAPI void APIENTRY glFlushPixelDataRangeNV (GLenum target);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPIXELDATARANGENVPROC) (GLenum target, GLsizei length, GLvoid *pointer);
+typedef void (APIENTRYP PFNGLFLUSHPIXELDATARANGENVPROC) (GLenum target);
+#endif
+
+#ifndef GL_NV_primitive_restart
+#define GL_NV_primitive_restart 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPrimitiveRestartNV (void);
+GLAPI void APIENTRY glPrimitiveRestartIndexNV (GLuint index);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPRIMITIVERESTARTNVPROC) (void);
+typedef void (APIENTRYP PFNGLPRIMITIVERESTARTINDEXNVPROC) (GLuint index);
+#endif
+
+#ifndef GL_NV_texture_expand_normal
+#define GL_NV_texture_expand_normal 1
+#endif
+
+#ifndef GL_NV_vertex_program2
+#define GL_NV_vertex_program2 1
+#endif
+
+#ifndef GL_ATI_map_object_buffer
+#define GL_ATI_map_object_buffer 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLvoid* APIENTRY glMapObjectBufferATI (GLuint buffer);
+GLAPI void APIENTRY glUnmapObjectBufferATI (GLuint buffer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLvoid* (APIENTRYP PFNGLMAPOBJECTBUFFERATIPROC) (GLuint buffer);
+typedef void (APIENTRYP PFNGLUNMAPOBJECTBUFFERATIPROC) (GLuint buffer);
+#endif
+
+#ifndef GL_ATI_separate_stencil
+#define GL_ATI_separate_stencil 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glStencilOpSeparateATI (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
+GLAPI void APIENTRY glStencilFuncSeparateATI (GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSTENCILOPSEPARATEATIPROC) (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
+typedef void (APIENTRYP PFNGLSTENCILFUNCSEPARATEATIPROC) (GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask);
+#endif
+
+#ifndef GL_ATI_vertex_attrib_array_object
+#define GL_ATI_vertex_attrib_array_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexAttribArrayObjectATI (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, GLuint buffer, GLuint offset);
+GLAPI void APIENTRY glGetVertexAttribArrayObjectfvATI (GLuint index, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetVertexAttribArrayObjectivATI (GLuint index, GLenum pname, GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXATTRIBARRAYOBJECTATIPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, GLuint buffer, GLuint offset);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBARRAYOBJECTFVATIPROC) (GLuint index, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBARRAYOBJECTIVATIPROC) (GLuint index, GLenum pname, GLint *params);
+#endif
+
+#ifndef GL_OES_read_format
+#define GL_OES_read_format 1
+#endif
+
+#ifndef GL_EXT_depth_bounds_test
+#define GL_EXT_depth_bounds_test 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDepthBoundsEXT (GLclampd zmin, GLclampd zmax);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDEPTHBOUNDSEXTPROC) (GLclampd zmin, GLclampd zmax);
+#endif
+
+#ifndef GL_EXT_texture_mirror_clamp
+#define GL_EXT_texture_mirror_clamp 1
+#endif
+
+#ifndef GL_EXT_blend_equation_separate
+#define GL_EXT_blend_equation_separate 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendEquationSeparateEXT (GLenum modeRGB, GLenum modeAlpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEEXTPROC) (GLenum modeRGB, GLenum modeAlpha);
+#endif
+
+#ifndef GL_MESA_pack_invert
+#define GL_MESA_pack_invert 1
+#endif
+
+#ifndef GL_MESA_ycbcr_texture
+#define GL_MESA_ycbcr_texture 1
+#endif
+
+#ifndef GL_EXT_pixel_buffer_object
+#define GL_EXT_pixel_buffer_object 1
+#endif
+
+#ifndef GL_NV_fragment_program_option
+#define GL_NV_fragment_program_option 1
+#endif
+
+#ifndef GL_NV_fragment_program2
+#define GL_NV_fragment_program2 1
+#endif
+
+#ifndef GL_NV_vertex_program2_option
+#define GL_NV_vertex_program2_option 1
+#endif
+
+#ifndef GL_NV_vertex_program3
+#define GL_NV_vertex_program3 1
+#endif
+
+#ifndef GL_EXT_framebuffer_object
+#define GL_EXT_framebuffer_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLboolean APIENTRY glIsRenderbufferEXT (GLuint renderbuffer);
+GLAPI void APIENTRY glBindRenderbufferEXT (GLenum target, GLuint renderbuffer);
+GLAPI void APIENTRY glDeleteRenderbuffersEXT (GLsizei n, const GLuint *renderbuffers);
+GLAPI void APIENTRY glGenRenderbuffersEXT (GLsizei n, GLuint *renderbuffers);
+GLAPI void APIENTRY glRenderbufferStorageEXT (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glGetRenderbufferParameterivEXT (GLenum target, GLenum pname, GLint *params);
+GLAPI GLboolean APIENTRY glIsFramebufferEXT (GLuint framebuffer);
+GLAPI void APIENTRY glBindFramebufferEXT (GLenum target, GLuint framebuffer);
+GLAPI void APIENTRY glDeleteFramebuffersEXT (GLsizei n, const GLuint *framebuffers);
+GLAPI void APIENTRY glGenFramebuffersEXT (GLsizei n, GLuint *framebuffers);
+GLAPI GLenum APIENTRY glCheckFramebufferStatusEXT (GLenum target);
+GLAPI void APIENTRY glFramebufferTexture1DEXT (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+GLAPI void APIENTRY glFramebufferTexture2DEXT (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+GLAPI void APIENTRY glFramebufferTexture3DEXT (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+GLAPI void APIENTRY glFramebufferRenderbufferEXT (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+GLAPI void APIENTRY glGetFramebufferAttachmentParameterivEXT (GLenum target, GLenum attachment, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGenerateMipmapEXT (GLenum target);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLboolean (APIENTRYP PFNGLISRENDERBUFFEREXTPROC) (GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLBINDRENDERBUFFEREXTPROC) (GLenum target, GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLDELETERENDERBUFFERSEXTPROC) (GLsizei n, const GLuint *renderbuffers);
+typedef void (APIENTRYP PFNGLGENRENDERBUFFERSEXTPROC) (GLsizei n, GLuint *renderbuffers);
+typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
+typedef GLboolean (APIENTRYP PFNGLISFRAMEBUFFEREXTPROC) (GLuint framebuffer);
+typedef void (APIENTRYP PFNGLBINDFRAMEBUFFEREXTPROC) (GLenum target, GLuint framebuffer);
+typedef void (APIENTRYP PFNGLDELETEFRAMEBUFFERSEXTPROC) (GLsizei n, const GLuint *framebuffers);
+typedef void (APIENTRYP PFNGLGENFRAMEBUFFERSEXTPROC) (GLsizei n, GLuint *framebuffers);
+typedef GLenum (APIENTRYP PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE1DEXTPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE3DEXTPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) (GLenum target, GLenum attachment, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGENERATEMIPMAPEXTPROC) (GLenum target);
+#endif
+
+#ifndef GL_GREMEDY_string_marker
+#define GL_GREMEDY_string_marker 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glStringMarkerGREMEDY (GLsizei len, const GLvoid *string);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSTRINGMARKERGREMEDYPROC) (GLsizei len, const GLvoid *string);
+#endif
+
+#ifndef GL_EXT_packed_depth_stencil
+#define GL_EXT_packed_depth_stencil 1
+#endif
+
+#ifndef GL_EXT_stencil_clear_tag
+#define GL_EXT_stencil_clear_tag 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glStencilClearTagEXT (GLsizei stencilTagBits, GLuint stencilClearTag);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLSTENCILCLEARTAGEXTPROC) (GLsizei stencilTagBits, GLuint stencilClearTag);
+#endif
+
+#ifndef GL_EXT_texture_sRGB
+#define GL_EXT_texture_sRGB 1
+#endif
+
+#ifndef GL_EXT_framebuffer_blit
+#define GL_EXT_framebuffer_blit 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlitFramebufferEXT (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLITFRAMEBUFFEREXTPROC) (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+#endif
+
+#ifndef GL_EXT_framebuffer_multisample
+#define GL_EXT_framebuffer_multisample 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glRenderbufferStorageMultisampleEXT (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC) (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
+#endif
+
+#ifndef GL_MESAX_texture_stack
+#define GL_MESAX_texture_stack 1
+#endif
+
+#ifndef GL_EXT_timer_query
+#define GL_EXT_timer_query 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetQueryObjecti64vEXT (GLuint id, GLenum pname, GLint64EXT *params);
+GLAPI void APIENTRY glGetQueryObjectui64vEXT (GLuint id, GLenum pname, GLuint64EXT *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTI64VEXTPROC) (GLuint id, GLenum pname, GLint64EXT *params);
+typedef void (APIENTRYP PFNGLGETQUERYOBJECTUI64VEXTPROC) (GLuint id, GLenum pname, GLuint64EXT *params);
+#endif
+
+#ifndef GL_EXT_gpu_program_parameters
+#define GL_EXT_gpu_program_parameters 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProgramEnvParameters4fvEXT (GLenum target, GLuint index, GLsizei count, const GLfloat *params);
+GLAPI void APIENTRY glProgramLocalParameters4fvEXT (GLenum target, GLuint index, GLsizei count, const GLfloat *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERS4FVEXTPROC) (GLenum target, GLuint index, GLsizei count, const GLfloat *params);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERS4FVEXTPROC) (GLenum target, GLuint index, GLsizei count, const GLfloat *params);
+#endif
+
+#ifndef GL_APPLE_flush_buffer_range
+#define GL_APPLE_flush_buffer_range 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBufferParameteriAPPLE (GLenum target, GLenum pname, GLint param);
+GLAPI void APIENTRY glFlushMappedBufferRangeAPPLE (GLenum target, GLintptr offset, GLsizeiptr size);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBUFFERPARAMETERIAPPLEPROC) (GLenum target, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLFLUSHMAPPEDBUFFERRANGEAPPLEPROC) (GLenum target, GLintptr offset, GLsizeiptr size);
+#endif
+
+#ifndef GL_NV_gpu_program4
+#define GL_NV_gpu_program4 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProgramLocalParameterI4iNV (GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
+GLAPI void APIENTRY glProgramLocalParameterI4ivNV (GLenum target, GLuint index, const GLint *params);
+GLAPI void APIENTRY glProgramLocalParametersI4ivNV (GLenum target, GLuint index, GLsizei count, const GLint *params);
+GLAPI void APIENTRY glProgramLocalParameterI4uiNV (GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+GLAPI void APIENTRY glProgramLocalParameterI4uivNV (GLenum target, GLuint index, const GLuint *params);
+GLAPI void APIENTRY glProgramLocalParametersI4uivNV (GLenum target, GLuint index, GLsizei count, const GLuint *params);
+GLAPI void APIENTRY glProgramEnvParameterI4iNV (GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
+GLAPI void APIENTRY glProgramEnvParameterI4ivNV (GLenum target, GLuint index, const GLint *params);
+GLAPI void APIENTRY glProgramEnvParametersI4ivNV (GLenum target, GLuint index, GLsizei count, const GLint *params);
+GLAPI void APIENTRY glProgramEnvParameterI4uiNV (GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+GLAPI void APIENTRY glProgramEnvParameterI4uivNV (GLenum target, GLuint index, const GLuint *params);
+GLAPI void APIENTRY glProgramEnvParametersI4uivNV (GLenum target, GLuint index, GLsizei count, const GLuint *params);
+GLAPI void APIENTRY glGetProgramLocalParameterIivNV (GLenum target, GLuint index, GLint *params);
+GLAPI void APIENTRY glGetProgramLocalParameterIuivNV (GLenum target, GLuint index, GLuint *params);
+GLAPI void APIENTRY glGetProgramEnvParameterIivNV (GLenum target, GLuint index, GLint *params);
+GLAPI void APIENTRY glGetProgramEnvParameterIuivNV (GLenum target, GLuint index, GLuint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERI4INVPROC) (GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERI4IVNVPROC) (GLenum target, GLuint index, const GLint *params);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERSI4IVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLint *params);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERI4UINVPROC) (GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERI4UIVNVPROC) (GLenum target, GLuint index, const GLuint *params);
+typedef void (APIENTRYP PFNGLPROGRAMLOCALPARAMETERSI4UIVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLuint *params);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERI4INVPROC) (GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERI4IVNVPROC) (GLenum target, GLuint index, const GLint *params);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERSI4IVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLint *params);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERI4UINVPROC) (GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERI4UIVNVPROC) (GLenum target, GLuint index, const GLuint *params);
+typedef void (APIENTRYP PFNGLPROGRAMENVPARAMETERSI4UIVNVPROC) (GLenum target, GLuint index, GLsizei count, const GLuint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMLOCALPARAMETERIIVNVPROC) (GLenum target, GLuint index, GLint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMLOCALPARAMETERIUIVNVPROC) (GLenum target, GLuint index, GLuint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMENVPARAMETERIIVNVPROC) (GLenum target, GLuint index, GLint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMENVPARAMETERIUIVNVPROC) (GLenum target, GLuint index, GLuint *params);
+#endif
+
+#ifndef GL_NV_geometry_program4
+#define GL_NV_geometry_program4 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProgramVertexLimitNV (GLenum target, GLint limit);
+GLAPI void APIENTRY glFramebufferTextureEXT (GLenum target, GLenum attachment, GLuint texture, GLint level);
+GLAPI void APIENTRY glFramebufferTextureLayerEXT (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
+GLAPI void APIENTRY glFramebufferTextureFaceEXT (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROGRAMVERTEXLIMITNVPROC) (GLenum target, GLint limit);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREEXTPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURELAYEREXTPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTUREFACEEXTPROC) (GLenum target, GLenum attachment, GLuint texture, GLint level, GLenum face);
+#endif
+
+#ifndef GL_EXT_geometry_shader4
+#define GL_EXT_geometry_shader4 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProgramParameteriEXT (GLuint program, GLenum pname, GLint value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROGRAMPARAMETERIEXTPROC) (GLuint program, GLenum pname, GLint value);
+#endif
+
+#ifndef GL_NV_vertex_program4
+#define GL_NV_vertex_program4 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexAttribI1iEXT (GLuint index, GLint x);
+GLAPI void APIENTRY glVertexAttribI2iEXT (GLuint index, GLint x, GLint y);
+GLAPI void APIENTRY glVertexAttribI3iEXT (GLuint index, GLint x, GLint y, GLint z);
+GLAPI void APIENTRY glVertexAttribI4iEXT (GLuint index, GLint x, GLint y, GLint z, GLint w);
+GLAPI void APIENTRY glVertexAttribI1uiEXT (GLuint index, GLuint x);
+GLAPI void APIENTRY glVertexAttribI2uiEXT (GLuint index, GLuint x, GLuint y);
+GLAPI void APIENTRY glVertexAttribI3uiEXT (GLuint index, GLuint x, GLuint y, GLuint z);
+GLAPI void APIENTRY glVertexAttribI4uiEXT (GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+GLAPI void APIENTRY glVertexAttribI1ivEXT (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttribI2ivEXT (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttribI3ivEXT (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttribI4ivEXT (GLuint index, const GLint *v);
+GLAPI void APIENTRY glVertexAttribI1uivEXT (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttribI2uivEXT (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttribI3uivEXT (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttribI4uivEXT (GLuint index, const GLuint *v);
+GLAPI void APIENTRY glVertexAttribI4bvEXT (GLuint index, const GLbyte *v);
+GLAPI void APIENTRY glVertexAttribI4svEXT (GLuint index, const GLshort *v);
+GLAPI void APIENTRY glVertexAttribI4ubvEXT (GLuint index, const GLubyte *v);
+GLAPI void APIENTRY glVertexAttribI4usvEXT (GLuint index, const GLushort *v);
+GLAPI void APIENTRY glVertexAttribIPointerEXT (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glGetVertexAttribIivEXT (GLuint index, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVertexAttribIuivEXT (GLuint index, GLenum pname, GLuint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IEXTPROC) (GLuint index, GLint x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IEXTPROC) (GLuint index, GLint x, GLint y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IEXTPROC) (GLuint index, GLint x, GLint y, GLint z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IEXTPROC) (GLuint index, GLint x, GLint y, GLint z, GLint w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIEXTPROC) (GLuint index, GLuint x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIEXTPROC) (GLuint index, GLuint x, GLuint y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIEXTPROC) (GLuint index, GLuint x, GLuint y, GLuint z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIEXTPROC) (GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1IVEXTPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2IVEXTPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3IVEXTPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4IVEXTPROC) (GLuint index, const GLint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI1UIVEXTPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI2UIVEXTPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI3UIVEXTPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UIVEXTPROC) (GLuint index, const GLuint *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4BVEXTPROC) (GLuint index, const GLbyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4SVEXTPROC) (GLuint index, const GLshort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4UBVEXTPROC) (GLuint index, const GLubyte *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBI4USVEXTPROC) (GLuint index, const GLushort *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBIPOINTEREXTPROC) (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIIVEXTPROC) (GLuint index, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIUIVEXTPROC) (GLuint index, GLenum pname, GLuint *params);
+#endif
+
+#ifndef GL_EXT_gpu_shader4
+#define GL_EXT_gpu_shader4 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetUniformuivEXT (GLuint program, GLint location, GLuint *params);
+GLAPI void APIENTRY glBindFragDataLocationEXT (GLuint program, GLuint color, const GLchar *name);
+GLAPI GLint APIENTRY glGetFragDataLocationEXT (GLuint program, const GLchar *name);
+GLAPI void APIENTRY glUniform1uiEXT (GLint location, GLuint v0);
+GLAPI void APIENTRY glUniform2uiEXT (GLint location, GLuint v0, GLuint v1);
+GLAPI void APIENTRY glUniform3uiEXT (GLint location, GLuint v0, GLuint v1, GLuint v2);
+GLAPI void APIENTRY glUniform4uiEXT (GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+GLAPI void APIENTRY glUniform1uivEXT (GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glUniform2uivEXT (GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glUniform3uivEXT (GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glUniform4uivEXT (GLint location, GLsizei count, const GLuint *value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETUNIFORMUIVEXTPROC) (GLuint program, GLint location, GLuint *params);
+typedef void (APIENTRYP PFNGLBINDFRAGDATALOCATIONEXTPROC) (GLuint program, GLuint color, const GLchar *name);
+typedef GLint (APIENTRYP PFNGLGETFRAGDATALOCATIONEXTPROC) (GLuint program, const GLchar *name);
+typedef void (APIENTRYP PFNGLUNIFORM1UIEXTPROC) (GLint location, GLuint v0);
+typedef void (APIENTRYP PFNGLUNIFORM2UIEXTPROC) (GLint location, GLuint v0, GLuint v1);
+typedef void (APIENTRYP PFNGLUNIFORM3UIEXTPROC) (GLint location, GLuint v0, GLuint v1, GLuint v2);
+typedef void (APIENTRYP PFNGLUNIFORM4UIEXTPROC) (GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+typedef void (APIENTRYP PFNGLUNIFORM1UIVEXTPROC) (GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLUNIFORM2UIVEXTPROC) (GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLUNIFORM3UIVEXTPROC) (GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLUNIFORM4UIVEXTPROC) (GLint location, GLsizei count, const GLuint *value);
+#endif
+
+#ifndef GL_EXT_draw_instanced
+#define GL_EXT_draw_instanced 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDrawArraysInstancedEXT (GLenum mode, GLint start, GLsizei count, GLsizei primcount);
+GLAPI void APIENTRY glDrawElementsInstancedEXT (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDEXTPROC) (GLenum mode, GLint start, GLsizei count, GLsizei primcount);
+typedef void (APIENTRYP PFNGLDRAWELEMENTSINSTANCEDEXTPROC) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount);
+#endif
+
+#ifndef GL_EXT_packed_float
+#define GL_EXT_packed_float 1
+#endif
+
+#ifndef GL_EXT_texture_array
+#define GL_EXT_texture_array 1
+#endif
+
+#ifndef GL_EXT_texture_buffer_object
+#define GL_EXT_texture_buffer_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTexBufferEXT (GLenum target, GLenum internalformat, GLuint buffer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXBUFFEREXTPROC) (GLenum target, GLenum internalformat, GLuint buffer);
+#endif
+
+#ifndef GL_EXT_texture_compression_latc
+#define GL_EXT_texture_compression_latc 1
+#endif
+
+#ifndef GL_EXT_texture_compression_rgtc
+#define GL_EXT_texture_compression_rgtc 1
+#endif
+
+#ifndef GL_EXT_texture_shared_exponent
+#define GL_EXT_texture_shared_exponent 1
+#endif
+
+#ifndef GL_NV_depth_buffer_float
+#define GL_NV_depth_buffer_float 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDepthRangedNV (GLdouble zNear, GLdouble zFar);
+GLAPI void APIENTRY glClearDepthdNV (GLdouble depth);
+GLAPI void APIENTRY glDepthBoundsdNV (GLdouble zmin, GLdouble zmax);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDEPTHRANGEDNVPROC) (GLdouble zNear, GLdouble zFar);
+typedef void (APIENTRYP PFNGLCLEARDEPTHDNVPROC) (GLdouble depth);
+typedef void (APIENTRYP PFNGLDEPTHBOUNDSDNVPROC) (GLdouble zmin, GLdouble zmax);
+#endif
+
+#ifndef GL_NV_fragment_program4
+#define GL_NV_fragment_program4 1
+#endif
+
+#ifndef GL_NV_framebuffer_multisample_coverage
+#define GL_NV_framebuffer_multisample_coverage 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glRenderbufferStorageMultisampleCoverageNV (GLenum target, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEMULTISAMPLECOVERAGENVPROC) (GLenum target, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height);
+#endif
+
+#ifndef GL_EXT_framebuffer_sRGB
+#define GL_EXT_framebuffer_sRGB 1
+#endif
+
+#ifndef GL_NV_geometry_shader4
+#define GL_NV_geometry_shader4 1
+#endif
+
+#ifndef GL_NV_parameter_buffer_object
+#define GL_NV_parameter_buffer_object 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProgramBufferParametersfvNV (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLfloat *params);
+GLAPI void APIENTRY glProgramBufferParametersIivNV (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLint *params);
+GLAPI void APIENTRY glProgramBufferParametersIuivNV (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLuint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROGRAMBUFFERPARAMETERSFVNVPROC) (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLfloat *params);
+typedef void (APIENTRYP PFNGLPROGRAMBUFFERPARAMETERSIIVNVPROC) (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLint *params);
+typedef void (APIENTRYP PFNGLPROGRAMBUFFERPARAMETERSIUIVNVPROC) (GLenum target, GLuint buffer, GLuint index, GLsizei count, const GLuint *params);
+#endif
+
+#ifndef GL_EXT_draw_buffers2
+#define GL_EXT_draw_buffers2 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glColorMaskIndexedEXT (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
+GLAPI void APIENTRY glGetBooleanIndexedvEXT (GLenum target, GLuint index, GLboolean *data);
+GLAPI void APIENTRY glGetIntegerIndexedvEXT (GLenum target, GLuint index, GLint *data);
+GLAPI void APIENTRY glEnableIndexedEXT (GLenum target, GLuint index);
+GLAPI void APIENTRY glDisableIndexedEXT (GLenum target, GLuint index);
+GLAPI GLboolean APIENTRY glIsEnabledIndexedEXT (GLenum target, GLuint index);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOLORMASKINDEXEDEXTPROC) (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
+typedef void (APIENTRYP PFNGLGETBOOLEANINDEXEDVEXTPROC) (GLenum target, GLuint index, GLboolean *data);
+typedef void (APIENTRYP PFNGLGETINTEGERINDEXEDVEXTPROC) (GLenum target, GLuint index, GLint *data);
+typedef void (APIENTRYP PFNGLENABLEINDEXEDEXTPROC) (GLenum target, GLuint index);
+typedef void (APIENTRYP PFNGLDISABLEINDEXEDEXTPROC) (GLenum target, GLuint index);
+typedef GLboolean (APIENTRYP PFNGLISENABLEDINDEXEDEXTPROC) (GLenum target, GLuint index);
+#endif
+
+#ifndef GL_NV_transform_feedback
+#define GL_NV_transform_feedback 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBeginTransformFeedbackNV (GLenum primitiveMode);
+GLAPI void APIENTRY glEndTransformFeedbackNV (void);
+GLAPI void APIENTRY glTransformFeedbackAttribsNV (GLuint count, const GLint *attribs, GLenum bufferMode);
+GLAPI void APIENTRY glBindBufferRangeNV (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
+GLAPI void APIENTRY glBindBufferOffsetNV (GLenum target, GLuint index, GLuint buffer, GLintptr offset);
+GLAPI void APIENTRY glBindBufferBaseNV (GLenum target, GLuint index, GLuint buffer);
+GLAPI void APIENTRY glTransformFeedbackVaryingsNV (GLuint program, GLsizei count, const GLint *locations, GLenum bufferMode);
+GLAPI void APIENTRY glActiveVaryingNV (GLuint program, const GLchar *name);
+GLAPI GLint APIENTRY glGetVaryingLocationNV (GLuint program, const GLchar *name);
+GLAPI void APIENTRY glGetActiveVaryingNV (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
+GLAPI void APIENTRY glGetTransformFeedbackVaryingNV (GLuint program, GLuint index, GLint *location);
+GLAPI void APIENTRY glTransformFeedbackStreamAttribsNV (GLsizei count, const GLint *attribs, GLsizei nbuffers, const GLint *bufstreams, GLenum bufferMode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBEGINTRANSFORMFEEDBACKNVPROC) (GLenum primitiveMode);
+typedef void (APIENTRYP PFNGLENDTRANSFORMFEEDBACKNVPROC) (void);
+typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKATTRIBSNVPROC) (GLuint count, const GLint *attribs, GLenum bufferMode);
+typedef void (APIENTRYP PFNGLBINDBUFFERRANGENVPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
+typedef void (APIENTRYP PFNGLBINDBUFFEROFFSETNVPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset);
+typedef void (APIENTRYP PFNGLBINDBUFFERBASENVPROC) (GLenum target, GLuint index, GLuint buffer);
+typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKVARYINGSNVPROC) (GLuint program, GLsizei count, const GLint *locations, GLenum bufferMode);
+typedef void (APIENTRYP PFNGLACTIVEVARYINGNVPROC) (GLuint program, const GLchar *name);
+typedef GLint (APIENTRYP PFNGLGETVARYINGLOCATIONNVPROC) (GLuint program, const GLchar *name);
+typedef void (APIENTRYP PFNGLGETACTIVEVARYINGNVPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
+typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKVARYINGNVPROC) (GLuint program, GLuint index, GLint *location);
+typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKSTREAMATTRIBSNVPROC) (GLsizei count, const GLint *attribs, GLsizei nbuffers, const GLint *bufstreams, GLenum bufferMode);
+#endif
+
+#ifndef GL_EXT_bindable_uniform
+#define GL_EXT_bindable_uniform 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glUniformBufferEXT (GLuint program, GLint location, GLuint buffer);
+GLAPI GLint APIENTRY glGetUniformBufferSizeEXT (GLuint program, GLint location);
+GLAPI GLintptr APIENTRY glGetUniformOffsetEXT (GLuint program, GLint location);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLUNIFORMBUFFEREXTPROC) (GLuint program, GLint location, GLuint buffer);
+typedef GLint (APIENTRYP PFNGLGETUNIFORMBUFFERSIZEEXTPROC) (GLuint program, GLint location);
+typedef GLintptr (APIENTRYP PFNGLGETUNIFORMOFFSETEXTPROC) (GLuint program, GLint location);
+#endif
+
+#ifndef GL_EXT_texture_integer
+#define GL_EXT_texture_integer 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTexParameterIivEXT (GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glTexParameterIuivEXT (GLenum target, GLenum pname, const GLuint *params);
+GLAPI void APIENTRY glGetTexParameterIivEXT (GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetTexParameterIuivEXT (GLenum target, GLenum pname, GLuint *params);
+GLAPI void APIENTRY glClearColorIiEXT (GLint red, GLint green, GLint blue, GLint alpha);
+GLAPI void APIENTRY glClearColorIuiEXT (GLuint red, GLuint green, GLuint blue, GLuint alpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXPARAMETERIIVEXTPROC) (GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLTEXPARAMETERIUIVEXTPROC) (GLenum target, GLenum pname, const GLuint *params);
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERIIVEXTPROC) (GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERIUIVEXTPROC) (GLenum target, GLenum pname, GLuint *params);
+typedef void (APIENTRYP PFNGLCLEARCOLORIIEXTPROC) (GLint red, GLint green, GLint blue, GLint alpha);
+typedef void (APIENTRYP PFNGLCLEARCOLORIUIEXTPROC) (GLuint red, GLuint green, GLuint blue, GLuint alpha);
+#endif
+
+#ifndef GL_GREMEDY_frame_terminator
+#define GL_GREMEDY_frame_terminator 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glFrameTerminatorGREMEDY (void);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLFRAMETERMINATORGREMEDYPROC) (void);
+#endif
+
+#ifndef GL_NV_conditional_render
+#define GL_NV_conditional_render 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBeginConditionalRenderNV (GLuint id, GLenum mode);
+GLAPI void APIENTRY glEndConditionalRenderNV (void);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBEGINCONDITIONALRENDERNVPROC) (GLuint id, GLenum mode);
+typedef void (APIENTRYP PFNGLENDCONDITIONALRENDERNVPROC) (void);
+#endif
+
+#ifndef GL_NV_present_video
+#define GL_NV_present_video 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glPresentFrameKeyedNV (GLuint video_slot, GLuint64EXT minPresentTime, GLuint beginPresentTimeId, GLuint presentDurationId, GLenum type, GLenum target0, GLuint fill0, GLuint key0, GLenum target1, GLuint fill1, GLuint key1);
+GLAPI void APIENTRY glPresentFrameDualFillNV (GLuint video_slot, GLuint64EXT minPresentTime, GLuint beginPresentTimeId, GLuint presentDurationId, GLenum type, GLenum target0, GLuint fill0, GLenum target1, GLuint fill1, GLenum target2, GLuint fill2, GLenum target3, GLuint fill3);
+GLAPI void APIENTRY glGetVideoivNV (GLuint video_slot, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVideouivNV (GLuint video_slot, GLenum pname, GLuint *params);
+GLAPI void APIENTRY glGetVideoi64vNV (GLuint video_slot, GLenum pname, GLint64EXT *params);
+GLAPI void APIENTRY glGetVideoui64vNV (GLuint video_slot, GLenum pname, GLuint64EXT *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPRESENTFRAMEKEYEDNVPROC) (GLuint video_slot, GLuint64EXT minPresentTime, GLuint beginPresentTimeId, GLuint presentDurationId, GLenum type, GLenum target0, GLuint fill0, GLuint key0, GLenum target1, GLuint fill1, GLuint key1);
+typedef void (APIENTRYP PFNGLPRESENTFRAMEDUALFILLNVPROC) (GLuint video_slot, GLuint64EXT minPresentTime, GLuint beginPresentTimeId, GLuint presentDurationId, GLenum type, GLenum target0, GLuint fill0, GLenum target1, GLuint fill1, GLenum target2, GLuint fill2, GLenum target3, GLuint fill3);
+typedef void (APIENTRYP PFNGLGETVIDEOIVNVPROC) (GLuint video_slot, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVIDEOUIVNVPROC) (GLuint video_slot, GLenum pname, GLuint *params);
+typedef void (APIENTRYP PFNGLGETVIDEOI64VNVPROC) (GLuint video_slot, GLenum pname, GLint64EXT *params);
+typedef void (APIENTRYP PFNGLGETVIDEOUI64VNVPROC) (GLuint video_slot, GLenum pname, GLuint64EXT *params);
+#endif
+
+#ifndef GL_EXT_transform_feedback
+#define GL_EXT_transform_feedback 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBeginTransformFeedbackEXT (GLenum primitiveMode);
+GLAPI void APIENTRY glEndTransformFeedbackEXT (void);
+GLAPI void APIENTRY glBindBufferRangeEXT (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
+GLAPI void APIENTRY glBindBufferOffsetEXT (GLenum target, GLuint index, GLuint buffer, GLintptr offset);
+GLAPI void APIENTRY glBindBufferBaseEXT (GLenum target, GLuint index, GLuint buffer);
+GLAPI void APIENTRY glTransformFeedbackVaryingsEXT (GLuint program, GLsizei count, const GLchar* *varyings, GLenum bufferMode);
+GLAPI void APIENTRY glGetTransformFeedbackVaryingEXT (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBEGINTRANSFORMFEEDBACKEXTPROC) (GLenum primitiveMode);
+typedef void (APIENTRYP PFNGLENDTRANSFORMFEEDBACKEXTPROC) (void);
+typedef void (APIENTRYP PFNGLBINDBUFFERRANGEEXTPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
+typedef void (APIENTRYP PFNGLBINDBUFFEROFFSETEXTPROC) (GLenum target, GLuint index, GLuint buffer, GLintptr offset);
+typedef void (APIENTRYP PFNGLBINDBUFFERBASEEXTPROC) (GLenum target, GLuint index, GLuint buffer);
+typedef void (APIENTRYP PFNGLTRANSFORMFEEDBACKVARYINGSEXTPROC) (GLuint program, GLsizei count, const GLchar* *varyings, GLenum bufferMode);
+typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKVARYINGEXTPROC) (GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name);
+#endif
+
+#ifndef GL_EXT_direct_state_access
+#define GL_EXT_direct_state_access 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glClientAttribDefaultEXT (GLbitfield mask);
+GLAPI void APIENTRY glPushClientAttribDefaultEXT (GLbitfield mask);
+GLAPI void APIENTRY glMatrixLoadfEXT (GLenum mode, const GLfloat *m);
+GLAPI void APIENTRY glMatrixLoaddEXT (GLenum mode, const GLdouble *m);
+GLAPI void APIENTRY glMatrixMultfEXT (GLenum mode, const GLfloat *m);
+GLAPI void APIENTRY glMatrixMultdEXT (GLenum mode, const GLdouble *m);
+GLAPI void APIENTRY glMatrixLoadIdentityEXT (GLenum mode);
+GLAPI void APIENTRY glMatrixRotatefEXT (GLenum mode, GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glMatrixRotatedEXT (GLenum mode, GLdouble angle, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glMatrixScalefEXT (GLenum mode, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glMatrixScaledEXT (GLenum mode, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glMatrixTranslatefEXT (GLenum mode, GLfloat x, GLfloat y, GLfloat z);
+GLAPI void APIENTRY glMatrixTranslatedEXT (GLenum mode, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glMatrixFrustumEXT (GLenum mode, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
+GLAPI void APIENTRY glMatrixOrthoEXT (GLenum mode, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
+GLAPI void APIENTRY glMatrixPopEXT (GLenum mode);
+GLAPI void APIENTRY glMatrixPushEXT (GLenum mode);
+GLAPI void APIENTRY glMatrixLoadTransposefEXT (GLenum mode, const GLfloat *m);
+GLAPI void APIENTRY glMatrixLoadTransposedEXT (GLenum mode, const GLdouble *m);
+GLAPI void APIENTRY glMatrixMultTransposefEXT (GLenum mode, const GLfloat *m);
+GLAPI void APIENTRY glMatrixMultTransposedEXT (GLenum mode, const GLdouble *m);
+GLAPI void APIENTRY glTextureParameterfEXT (GLuint texture, GLenum target, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glTextureParameterfvEXT (GLuint texture, GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glTextureParameteriEXT (GLuint texture, GLenum target, GLenum pname, GLint param);
+GLAPI void APIENTRY glTextureParameterivEXT (GLuint texture, GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glTextureImage1DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glTextureImage2DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glTextureSubImage1DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glTextureSubImage2DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glCopyTextureImage1DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
+GLAPI void APIENTRY glCopyTextureImage2DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
+GLAPI void APIENTRY glCopyTextureSubImage1DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+GLAPI void APIENTRY glCopyTextureSubImage2DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glGetTextureImageEXT (GLuint texture, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
+GLAPI void APIENTRY glGetTextureParameterfvEXT (GLuint texture, GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetTextureParameterivEXT (GLuint texture, GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetTextureLevelParameterfvEXT (GLuint texture, GLenum target, GLint level, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetTextureLevelParameterivEXT (GLuint texture, GLenum target, GLint level, GLenum pname, GLint *params);
+GLAPI void APIENTRY glTextureImage3DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glTextureSubImage3DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glCopyTextureSubImage3DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glMultiTexParameterfEXT (GLenum texunit, GLenum target, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glMultiTexParameterfvEXT (GLenum texunit, GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glMultiTexParameteriEXT (GLenum texunit, GLenum target, GLenum pname, GLint param);
+GLAPI void APIENTRY glMultiTexParameterivEXT (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glMultiTexImage1DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glMultiTexImage2DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glMultiTexSubImage1DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glMultiTexSubImage2DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glCopyMultiTexImage1DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
+GLAPI void APIENTRY glCopyMultiTexImage2DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
+GLAPI void APIENTRY glCopyMultiTexSubImage1DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+GLAPI void APIENTRY glCopyMultiTexSubImage2DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glGetMultiTexImageEXT (GLenum texunit, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
+GLAPI void APIENTRY glGetMultiTexParameterfvEXT (GLenum texunit, GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetMultiTexParameterivEXT (GLenum texunit, GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetMultiTexLevelParameterfvEXT (GLenum texunit, GLenum target, GLint level, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetMultiTexLevelParameterivEXT (GLenum texunit, GLenum target, GLint level, GLenum pname, GLint *params);
+GLAPI void APIENTRY glMultiTexImage3DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glMultiTexSubImage3DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+GLAPI void APIENTRY glCopyMultiTexSubImage3DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glBindMultiTextureEXT (GLenum texunit, GLenum target, GLuint texture);
+GLAPI void APIENTRY glEnableClientStateIndexedEXT (GLenum array, GLuint index);
+GLAPI void APIENTRY glDisableClientStateIndexedEXT (GLenum array, GLuint index);
+GLAPI void APIENTRY glMultiTexCoordPointerEXT (GLenum texunit, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glMultiTexEnvfEXT (GLenum texunit, GLenum target, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glMultiTexEnvfvEXT (GLenum texunit, GLenum target, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glMultiTexEnviEXT (GLenum texunit, GLenum target, GLenum pname, GLint param);
+GLAPI void APIENTRY glMultiTexEnvivEXT (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glMultiTexGendEXT (GLenum texunit, GLenum coord, GLenum pname, GLdouble param);
+GLAPI void APIENTRY glMultiTexGendvEXT (GLenum texunit, GLenum coord, GLenum pname, const GLdouble *params);
+GLAPI void APIENTRY glMultiTexGenfEXT (GLenum texunit, GLenum coord, GLenum pname, GLfloat param);
+GLAPI void APIENTRY glMultiTexGenfvEXT (GLenum texunit, GLenum coord, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glMultiTexGeniEXT (GLenum texunit, GLenum coord, GLenum pname, GLint param);
+GLAPI void APIENTRY glMultiTexGenivEXT (GLenum texunit, GLenum coord, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glGetMultiTexEnvfvEXT (GLenum texunit, GLenum target, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetMultiTexEnvivEXT (GLenum texunit, GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetMultiTexGendvEXT (GLenum texunit, GLenum coord, GLenum pname, GLdouble *params);
+GLAPI void APIENTRY glGetMultiTexGenfvEXT (GLenum texunit, GLenum coord, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetMultiTexGenivEXT (GLenum texunit, GLenum coord, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetFloatIndexedvEXT (GLenum target, GLuint index, GLfloat *data);
+GLAPI void APIENTRY glGetDoubleIndexedvEXT (GLenum target, GLuint index, GLdouble *data);
+GLAPI void APIENTRY glGetPointerIndexedvEXT (GLenum target, GLuint index, GLvoid* *data);
+GLAPI void APIENTRY glCompressedTextureImage3DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedTextureImage2DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedTextureImage1DEXT (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedTextureSubImage3DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedTextureSubImage2DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedTextureSubImage1DEXT (GLuint texture, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glGetCompressedTextureImageEXT (GLuint texture, GLenum target, GLint lod, GLvoid *img);
+GLAPI void APIENTRY glCompressedMultiTexImage3DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedMultiTexImage2DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedMultiTexImage1DEXT (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedMultiTexSubImage3DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedMultiTexSubImage2DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glCompressedMultiTexSubImage1DEXT (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *bits);
+GLAPI void APIENTRY glGetCompressedMultiTexImageEXT (GLenum texunit, GLenum target, GLint lod, GLvoid *img);
+GLAPI void APIENTRY glNamedProgramStringEXT (GLuint program, GLenum target, GLenum format, GLsizei len, const GLvoid *string);
+GLAPI void APIENTRY glNamedProgramLocalParameter4dEXT (GLuint program, GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glNamedProgramLocalParameter4dvEXT (GLuint program, GLenum target, GLuint index, const GLdouble *params);
+GLAPI void APIENTRY glNamedProgramLocalParameter4fEXT (GLuint program, GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+GLAPI void APIENTRY glNamedProgramLocalParameter4fvEXT (GLuint program, GLenum target, GLuint index, const GLfloat *params);
+GLAPI void APIENTRY glGetNamedProgramLocalParameterdvEXT (GLuint program, GLenum target, GLuint index, GLdouble *params);
+GLAPI void APIENTRY glGetNamedProgramLocalParameterfvEXT (GLuint program, GLenum target, GLuint index, GLfloat *params);
+GLAPI void APIENTRY glGetNamedProgramivEXT (GLuint program, GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetNamedProgramStringEXT (GLuint program, GLenum target, GLenum pname, GLvoid *string);
+GLAPI void APIENTRY glNamedProgramLocalParameters4fvEXT (GLuint program, GLenum target, GLuint index, GLsizei count, const GLfloat *params);
+GLAPI void APIENTRY glNamedProgramLocalParameterI4iEXT (GLuint program, GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
+GLAPI void APIENTRY glNamedProgramLocalParameterI4ivEXT (GLuint program, GLenum target, GLuint index, const GLint *params);
+GLAPI void APIENTRY glNamedProgramLocalParametersI4ivEXT (GLuint program, GLenum target, GLuint index, GLsizei count, const GLint *params);
+GLAPI void APIENTRY glNamedProgramLocalParameterI4uiEXT (GLuint program, GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+GLAPI void APIENTRY glNamedProgramLocalParameterI4uivEXT (GLuint program, GLenum target, GLuint index, const GLuint *params);
+GLAPI void APIENTRY glNamedProgramLocalParametersI4uivEXT (GLuint program, GLenum target, GLuint index, GLsizei count, const GLuint *params);
+GLAPI void APIENTRY glGetNamedProgramLocalParameterIivEXT (GLuint program, GLenum target, GLuint index, GLint *params);
+GLAPI void APIENTRY glGetNamedProgramLocalParameterIuivEXT (GLuint program, GLenum target, GLuint index, GLuint *params);
+GLAPI void APIENTRY glTextureParameterIivEXT (GLuint texture, GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glTextureParameterIuivEXT (GLuint texture, GLenum target, GLenum pname, const GLuint *params);
+GLAPI void APIENTRY glGetTextureParameterIivEXT (GLuint texture, GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetTextureParameterIuivEXT (GLuint texture, GLenum target, GLenum pname, GLuint *params);
+GLAPI void APIENTRY glMultiTexParameterIivEXT (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glMultiTexParameterIuivEXT (GLenum texunit, GLenum target, GLenum pname, const GLuint *params);
+GLAPI void APIENTRY glGetMultiTexParameterIivEXT (GLenum texunit, GLenum target, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetMultiTexParameterIuivEXT (GLenum texunit, GLenum target, GLenum pname, GLuint *params);
+GLAPI void APIENTRY glProgramUniform1fEXT (GLuint program, GLint location, GLfloat v0);
+GLAPI void APIENTRY glProgramUniform2fEXT (GLuint program, GLint location, GLfloat v0, GLfloat v1);
+GLAPI void APIENTRY glProgramUniform3fEXT (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+GLAPI void APIENTRY glProgramUniform4fEXT (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+GLAPI void APIENTRY glProgramUniform1iEXT (GLuint program, GLint location, GLint v0);
+GLAPI void APIENTRY glProgramUniform2iEXT (GLuint program, GLint location, GLint v0, GLint v1);
+GLAPI void APIENTRY glProgramUniform3iEXT (GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
+GLAPI void APIENTRY glProgramUniform4iEXT (GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+GLAPI void APIENTRY glProgramUniform1fvEXT (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform2fvEXT (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform3fvEXT (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform4fvEXT (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform1ivEXT (GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glProgramUniform2ivEXT (GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glProgramUniform3ivEXT (GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glProgramUniform4ivEXT (GLuint program, GLint location, GLsizei count, const GLint *value);
+GLAPI void APIENTRY glProgramUniformMatrix2fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix3fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix4fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix2x3fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix3x2fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix2x4fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix4x2fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix3x4fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniformMatrix4x3fvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+GLAPI void APIENTRY glProgramUniform1uiEXT (GLuint program, GLint location, GLuint v0);
+GLAPI void APIENTRY glProgramUniform2uiEXT (GLuint program, GLint location, GLuint v0, GLuint v1);
+GLAPI void APIENTRY glProgramUniform3uiEXT (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
+GLAPI void APIENTRY glProgramUniform4uiEXT (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+GLAPI void APIENTRY glProgramUniform1uivEXT (GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glProgramUniform2uivEXT (GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glProgramUniform3uivEXT (GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glProgramUniform4uivEXT (GLuint program, GLint location, GLsizei count, const GLuint *value);
+GLAPI void APIENTRY glNamedBufferDataEXT (GLuint buffer, GLsizeiptr size, const GLvoid *data, GLenum usage);
+GLAPI void APIENTRY glNamedBufferSubDataEXT (GLuint buffer, GLintptr offset, GLsizeiptr size, const GLvoid *data);
+GLAPI GLvoid* APIENTRY glMapNamedBufferEXT (GLuint buffer, GLenum access);
+GLAPI GLboolean APIENTRY glUnmapNamedBufferEXT (GLuint buffer);
+GLAPI GLvoid* APIENTRY glMapNamedBufferRangeEXT (GLuint buffer, GLintptr offset, GLsizeiptr length, GLbitfield access);
+GLAPI void APIENTRY glFlushMappedNamedBufferRangeEXT (GLuint buffer, GLintptr offset, GLsizeiptr length);
+GLAPI void APIENTRY glNamedCopyBufferSubDataEXT (GLuint readBuffer, GLuint writeBuffer, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
+GLAPI void APIENTRY glGetNamedBufferParameterivEXT (GLuint buffer, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetNamedBufferPointervEXT (GLuint buffer, GLenum pname, GLvoid* *params);
+GLAPI void APIENTRY glGetNamedBufferSubDataEXT (GLuint buffer, GLintptr offset, GLsizeiptr size, GLvoid *data);
+GLAPI void APIENTRY glTextureBufferEXT (GLuint texture, GLenum target, GLenum internalformat, GLuint buffer);
+GLAPI void APIENTRY glMultiTexBufferEXT (GLenum texunit, GLenum target, GLenum internalformat, GLuint buffer);
+GLAPI void APIENTRY glNamedRenderbufferStorageEXT (GLuint renderbuffer, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glGetNamedRenderbufferParameterivEXT (GLuint renderbuffer, GLenum pname, GLint *params);
+GLAPI GLenum APIENTRY glCheckNamedFramebufferStatusEXT (GLuint framebuffer, GLenum target);
+GLAPI void APIENTRY glNamedFramebufferTexture1DEXT (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+GLAPI void APIENTRY glNamedFramebufferTexture2DEXT (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+GLAPI void APIENTRY glNamedFramebufferTexture3DEXT (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+GLAPI void APIENTRY glNamedFramebufferRenderbufferEXT (GLuint framebuffer, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+GLAPI void APIENTRY glGetNamedFramebufferAttachmentParameterivEXT (GLuint framebuffer, GLenum attachment, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGenerateTextureMipmapEXT (GLuint texture, GLenum target);
+GLAPI void APIENTRY glGenerateMultiTexMipmapEXT (GLenum texunit, GLenum target);
+GLAPI void APIENTRY glFramebufferDrawBufferEXT (GLuint framebuffer, GLenum mode);
+GLAPI void APIENTRY glFramebufferDrawBuffersEXT (GLuint framebuffer, GLsizei n, const GLenum *bufs);
+GLAPI void APIENTRY glFramebufferReadBufferEXT (GLuint framebuffer, GLenum mode);
+GLAPI void APIENTRY glGetFramebufferParameterivEXT (GLuint framebuffer, GLenum pname, GLint *params);
+GLAPI void APIENTRY glNamedRenderbufferStorageMultisampleEXT (GLuint renderbuffer, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glNamedRenderbufferStorageMultisampleCoverageEXT (GLuint renderbuffer, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height);
+GLAPI void APIENTRY glNamedFramebufferTextureEXT (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level);
+GLAPI void APIENTRY glNamedFramebufferTextureLayerEXT (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLint layer);
+GLAPI void APIENTRY glNamedFramebufferTextureFaceEXT (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLenum face);
+GLAPI void APIENTRY glTextureRenderbufferEXT (GLuint texture, GLenum target, GLuint renderbuffer);
+GLAPI void APIENTRY glMultiTexRenderbufferEXT (GLenum texunit, GLenum target, GLuint renderbuffer);
+GLAPI void APIENTRY glProgramUniform1dEXT (GLuint program, GLint location, GLdouble x);
+GLAPI void APIENTRY glProgramUniform2dEXT (GLuint program, GLint location, GLdouble x, GLdouble y);
+GLAPI void APIENTRY glProgramUniform3dEXT (GLuint program, GLint location, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glProgramUniform4dEXT (GLuint program, GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glProgramUniform1dvEXT (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniform2dvEXT (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniform3dvEXT (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniform4dvEXT (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix2dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix3dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix4dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix2x3dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix2x4dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix3x2dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix3x4dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix4x2dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+GLAPI void APIENTRY glProgramUniformMatrix4x3dvEXT (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCLIENTATTRIBDEFAULTEXTPROC) (GLbitfield mask);
+typedef void (APIENTRYP PFNGLPUSHCLIENTATTRIBDEFAULTEXTPROC) (GLbitfield mask);
+typedef void (APIENTRYP PFNGLMATRIXLOADFEXTPROC) (GLenum mode, const GLfloat *m);
+typedef void (APIENTRYP PFNGLMATRIXLOADDEXTPROC) (GLenum mode, const GLdouble *m);
+typedef void (APIENTRYP PFNGLMATRIXMULTFEXTPROC) (GLenum mode, const GLfloat *m);
+typedef void (APIENTRYP PFNGLMATRIXMULTDEXTPROC) (GLenum mode, const GLdouble *m);
+typedef void (APIENTRYP PFNGLMATRIXLOADIDENTITYEXTPROC) (GLenum mode);
+typedef void (APIENTRYP PFNGLMATRIXROTATEFEXTPROC) (GLenum mode, GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLMATRIXROTATEDEXTPROC) (GLenum mode, GLdouble angle, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLMATRIXSCALEFEXTPROC) (GLenum mode, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLMATRIXSCALEDEXTPROC) (GLenum mode, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLMATRIXTRANSLATEFEXTPROC) (GLenum mode, GLfloat x, GLfloat y, GLfloat z);
+typedef void (APIENTRYP PFNGLMATRIXTRANSLATEDEXTPROC) (GLenum mode, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLMATRIXFRUSTUMEXTPROC) (GLenum mode, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
+typedef void (APIENTRYP PFNGLMATRIXORTHOEXTPROC) (GLenum mode, GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
+typedef void (APIENTRYP PFNGLMATRIXPOPEXTPROC) (GLenum mode);
+typedef void (APIENTRYP PFNGLMATRIXPUSHEXTPROC) (GLenum mode);
+typedef void (APIENTRYP PFNGLMATRIXLOADTRANSPOSEFEXTPROC) (GLenum mode, const GLfloat *m);
+typedef void (APIENTRYP PFNGLMATRIXLOADTRANSPOSEDEXTPROC) (GLenum mode, const GLdouble *m);
+typedef void (APIENTRYP PFNGLMATRIXMULTTRANSPOSEFEXTPROC) (GLenum mode, const GLfloat *m);
+typedef void (APIENTRYP PFNGLMATRIXMULTTRANSPOSEDEXTPROC) (GLenum mode, const GLdouble *m);
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERFEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERFVEXTPROC) (GLuint texture, GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLTEXTUREIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLTEXTUREIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLCOPYTEXTUREIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
+typedef void (APIENTRYP PFNGLCOPYTEXTUREIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
+typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLGETTEXTUREIMAGEEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
+typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERFVEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETTEXTURELEVELPARAMETERFVEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETTEXTURELEVELPARAMETERIVEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLTEXTUREIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLTEXTURESUBIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLCOPYTEXTURESUBIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLMULTITEXPARAMETERFEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLMULTITEXPARAMETERFVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLMULTITEXPARAMETERIEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLMULTITEXPARAMETERIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLMULTITEXIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLMULTITEXIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLMULTITEXSUBIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLMULTITEXSUBIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLCOPYMULTITEXIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
+typedef void (APIENTRYP PFNGLCOPYMULTITEXIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
+typedef void (APIENTRYP PFNGLCOPYMULTITEXSUBIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+typedef void (APIENTRYP PFNGLCOPYMULTITEXSUBIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLGETMULTITEXIMAGEEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
+typedef void (APIENTRYP PFNGLGETMULTITEXPARAMETERFVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXPARAMETERIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXLEVELPARAMETERFVEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXLEVELPARAMETERIVEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLMULTITEXIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLMULTITEXSUBIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+typedef void (APIENTRYP PFNGLCOPYMULTITEXSUBIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLBINDMULTITEXTUREEXTPROC) (GLenum texunit, GLenum target, GLuint texture);
+typedef void (APIENTRYP PFNGLENABLECLIENTSTATEINDEXEDEXTPROC) (GLenum array, GLuint index);
+typedef void (APIENTRYP PFNGLDISABLECLIENTSTATEINDEXEDEXTPROC) (GLenum array, GLuint index);
+typedef void (APIENTRYP PFNGLMULTITEXCOORDPOINTEREXTPROC) (GLenum texunit, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLMULTITEXENVFEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLMULTITEXENVFVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLMULTITEXENVIEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLMULTITEXENVIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLMULTITEXGENDEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLdouble param);
+typedef void (APIENTRYP PFNGLMULTITEXGENDVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, const GLdouble *params);
+typedef void (APIENTRYP PFNGLMULTITEXGENFEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLfloat param);
+typedef void (APIENTRYP PFNGLMULTITEXGENFVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLMULTITEXGENIEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLint param);
+typedef void (APIENTRYP PFNGLMULTITEXGENIVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXENVFVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXENVIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXGENDVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLdouble *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXGENFVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXGENIVEXTPROC) (GLenum texunit, GLenum coord, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETFLOATINDEXEDVEXTPROC) (GLenum target, GLuint index, GLfloat *data);
+typedef void (APIENTRYP PFNGLGETDOUBLEINDEXEDVEXTPROC) (GLenum target, GLuint index, GLdouble *data);
+typedef void (APIENTRYP PFNGLGETPOINTERINDEXEDVEXTPROC) (GLenum target, GLuint index, GLvoid* *data);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTUREIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTUREIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTUREIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE3DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE2DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDTEXTURESUBIMAGE1DEXTPROC) (GLuint texture, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLGETCOMPRESSEDTEXTUREIMAGEEXTPROC) (GLuint texture, GLenum target, GLint lod, GLvoid *img);
+typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXSUBIMAGE3DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXSUBIMAGE2DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLCOMPRESSEDMULTITEXSUBIMAGE1DEXTPROC) (GLenum texunit, GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const GLvoid *bits);
+typedef void (APIENTRYP PFNGLGETCOMPRESSEDMULTITEXIMAGEEXTPROC) (GLenum texunit, GLenum target, GLint lod, GLvoid *img);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMSTRINGEXTPROC) (GLuint program, GLenum target, GLenum format, GLsizei len, const GLvoid *string);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETER4DEXTPROC) (GLuint program, GLenum target, GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETER4DVEXTPROC) (GLuint program, GLenum target, GLuint index, const GLdouble *params);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETER4FEXTPROC) (GLuint program, GLenum target, GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETER4FVEXTPROC) (GLuint program, GLenum target, GLuint index, const GLfloat *params);
+typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMLOCALPARAMETERDVEXTPROC) (GLuint program, GLenum target, GLuint index, GLdouble *params);
+typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMLOCALPARAMETERFVEXTPROC) (GLuint program, GLenum target, GLuint index, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMIVEXTPROC) (GLuint program, GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMSTRINGEXTPROC) (GLuint program, GLenum target, GLenum pname, GLvoid *string);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERS4FVEXTPROC) (GLuint program, GLenum target, GLuint index, GLsizei count, const GLfloat *params);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERI4IEXTPROC) (GLuint program, GLenum target, GLuint index, GLint x, GLint y, GLint z, GLint w);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERI4IVEXTPROC) (GLuint program, GLenum target, GLuint index, const GLint *params);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERSI4IVEXTPROC) (GLuint program, GLenum target, GLuint index, GLsizei count, const GLint *params);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERI4UIEXTPROC) (GLuint program, GLenum target, GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERI4UIVEXTPROC) (GLuint program, GLenum target, GLuint index, const GLuint *params);
+typedef void (APIENTRYP PFNGLNAMEDPROGRAMLOCALPARAMETERSI4UIVEXTPROC) (GLuint program, GLenum target, GLuint index, GLsizei count, const GLuint *params);
+typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMLOCALPARAMETERIIVEXTPROC) (GLuint program, GLenum target, GLuint index, GLint *params);
+typedef void (APIENTRYP PFNGLGETNAMEDPROGRAMLOCALPARAMETERIUIVEXTPROC) (GLuint program, GLenum target, GLuint index, GLuint *params);
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLTEXTUREPARAMETERIUIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, const GLuint *params);
+typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETTEXTUREPARAMETERIUIVEXTPROC) (GLuint texture, GLenum target, GLenum pname, GLuint *params);
+typedef void (APIENTRYP PFNGLMULTITEXPARAMETERIIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLMULTITEXPARAMETERIUIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, const GLuint *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXPARAMETERIIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETMULTITEXPARAMETERIUIVEXTPROC) (GLenum texunit, GLenum target, GLenum pname, GLuint *params);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FEXTPROC) (GLuint program, GLint location, GLfloat v0);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FEXTPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FEXTPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FEXTPROC) (GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IEXTPROC) (GLuint program, GLint location, GLint v0);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IEXTPROC) (GLuint program, GLint location, GLint v0, GLint v1);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IEXTPROC) (GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IEXTPROC) (GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1FVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2FVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3FVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4FVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1IVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2IVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3IVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4IVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3FVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIEXTPROC) (GLuint program, GLint location, GLuint v0);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIEXTPROC) (GLuint program, GLint location, GLuint v0, GLuint v1);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIEXTPROC) (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIEXTPROC) (GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UIVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UIVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UIVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UIVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLuint *value);
+typedef void (APIENTRYP PFNGLNAMEDBUFFERDATAEXTPROC) (GLuint buffer, GLsizeiptr size, const GLvoid *data, GLenum usage);
+typedef void (APIENTRYP PFNGLNAMEDBUFFERSUBDATAEXTPROC) (GLuint buffer, GLintptr offset, GLsizeiptr size, const GLvoid *data);
+typedef GLvoid* (APIENTRYP PFNGLMAPNAMEDBUFFEREXTPROC) (GLuint buffer, GLenum access);
+typedef GLboolean (APIENTRYP PFNGLUNMAPNAMEDBUFFEREXTPROC) (GLuint buffer);
+typedef GLvoid* (APIENTRYP PFNGLMAPNAMEDBUFFERRANGEEXTPROC) (GLuint buffer, GLintptr offset, GLsizeiptr length, GLbitfield access);
+typedef void (APIENTRYP PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEEXTPROC) (GLuint buffer, GLintptr offset, GLsizeiptr length);
+typedef void (APIENTRYP PFNGLNAMEDCOPYBUFFERSUBDATAEXTPROC) (GLuint readBuffer, GLuint writeBuffer, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size);
+typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPARAMETERIVEXTPROC) (GLuint buffer, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPOINTERVEXTPROC) (GLuint buffer, GLenum pname, GLvoid* *params);
+typedef void (APIENTRYP PFNGLGETNAMEDBUFFERSUBDATAEXTPROC) (GLuint buffer, GLintptr offset, GLsizeiptr size, GLvoid *data);
+typedef void (APIENTRYP PFNGLTEXTUREBUFFEREXTPROC) (GLuint texture, GLenum target, GLenum internalformat, GLuint buffer);
+typedef void (APIENTRYP PFNGLMULTITEXBUFFEREXTPROC) (GLenum texunit, GLenum target, GLenum internalformat, GLuint buffer);
+typedef void (APIENTRYP PFNGLNAMEDRENDERBUFFERSTORAGEEXTPROC) (GLuint renderbuffer, GLenum internalformat, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLGETNAMEDRENDERBUFFERPARAMETERIVEXTPROC) (GLuint renderbuffer, GLenum pname, GLint *params);
+typedef GLenum (APIENTRYP PFNGLCHECKNAMEDFRAMEBUFFERSTATUSEXTPROC) (GLuint framebuffer, GLenum target);
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURE1DEXTPROC) (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURE2DEXTPROC) (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURE3DEXTPROC) (GLuint framebuffer, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERRENDERBUFFEREXTPROC) (GLuint framebuffer, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLGETNAMEDFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) (GLuint framebuffer, GLenum attachment, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGENERATETEXTUREMIPMAPEXTPROC) (GLuint texture, GLenum target);
+typedef void (APIENTRYP PFNGLGENERATEMULTITEXMIPMAPEXTPROC) (GLenum texunit, GLenum target);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERDRAWBUFFEREXTPROC) (GLuint framebuffer, GLenum mode);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERDRAWBUFFERSEXTPROC) (GLuint framebuffer, GLsizei n, const GLenum *bufs);
+typedef void (APIENTRYP PFNGLFRAMEBUFFERREADBUFFEREXTPROC) (GLuint framebuffer, GLenum mode);
+typedef void (APIENTRYP PFNGLGETFRAMEBUFFERPARAMETERIVEXTPROC) (GLuint framebuffer, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLNAMEDRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC) (GLuint renderbuffer, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLNAMEDRENDERBUFFERSTORAGEMULTISAMPLECOVERAGEEXTPROC) (GLuint renderbuffer, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height);
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTUREEXTPROC) (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level);
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTURELAYEREXTPROC) (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLint layer);
+typedef void (APIENTRYP PFNGLNAMEDFRAMEBUFFERTEXTUREFACEEXTPROC) (GLuint framebuffer, GLenum attachment, GLuint texture, GLint level, GLenum face);
+typedef void (APIENTRYP PFNGLTEXTURERENDERBUFFEREXTPROC) (GLuint texture, GLenum target, GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLMULTITEXRENDERBUFFEREXTPROC) (GLenum texunit, GLenum target, GLuint renderbuffer);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DEXTPROC) (GLuint program, GLint location, GLdouble x);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DEXTPROC) (GLuint program, GLint location, GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DEXTPROC) (GLuint program, GLint location, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DEXTPROC) (GLuint program, GLint location, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1DVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2DVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3DVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4DVEXTPROC) (GLuint program, GLint location, GLsizei count, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X3DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX2X4DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X2DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX3X4DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X2DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMMATRIX4X3DVEXTPROC) (GLuint program, GLint location, GLsizei count, GLboolean transpose, const GLdouble *value);
+#endif
+
+#ifndef GL_EXT_vertex_array_bgra
+#define GL_EXT_vertex_array_bgra 1
+#endif
+
+#ifndef GL_EXT_texture_swizzle
+#define GL_EXT_texture_swizzle 1
+#endif
+
+#ifndef GL_NV_explicit_multisample
+#define GL_NV_explicit_multisample 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetMultisamplefvNV (GLenum pname, GLuint index, GLfloat *val);
+GLAPI void APIENTRY glSampleMaskIndexedNV (GLuint index, GLbitfield mask);
+GLAPI void APIENTRY glTexRenderbufferNV (GLenum target, GLuint renderbuffer);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETMULTISAMPLEFVNVPROC) (GLenum pname, GLuint index, GLfloat *val);
+typedef void (APIENTRYP PFNGLSAMPLEMASKINDEXEDNVPROC) (GLuint index, GLbitfield mask);
+typedef void (APIENTRYP PFNGLTEXRENDERBUFFERNVPROC) (GLenum target, GLuint renderbuffer);
+#endif
+
+#ifndef GL_NV_transform_feedback2
+#define GL_NV_transform_feedback2 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBindTransformFeedbackNV (GLenum target, GLuint id);
+GLAPI void APIENTRY glDeleteTransformFeedbacksNV (GLsizei n, const GLuint *ids);
+GLAPI void APIENTRY glGenTransformFeedbacksNV (GLsizei n, GLuint *ids);
+GLAPI GLboolean APIENTRY glIsTransformFeedbackNV (GLuint id);
+GLAPI void APIENTRY glPauseTransformFeedbackNV (void);
+GLAPI void APIENTRY glResumeTransformFeedbackNV (void);
+GLAPI void APIENTRY glDrawTransformFeedbackNV (GLenum mode, GLuint id);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBINDTRANSFORMFEEDBACKNVPROC) (GLenum target, GLuint id);
+typedef void (APIENTRYP PFNGLDELETETRANSFORMFEEDBACKSNVPROC) (GLsizei n, const GLuint *ids);
+typedef void (APIENTRYP PFNGLGENTRANSFORMFEEDBACKSNVPROC) (GLsizei n, GLuint *ids);
+typedef GLboolean (APIENTRYP PFNGLISTRANSFORMFEEDBACKNVPROC) (GLuint id);
+typedef void (APIENTRYP PFNGLPAUSETRANSFORMFEEDBACKNVPROC) (void);
+typedef void (APIENTRYP PFNGLRESUMETRANSFORMFEEDBACKNVPROC) (void);
+typedef void (APIENTRYP PFNGLDRAWTRANSFORMFEEDBACKNVPROC) (GLenum mode, GLuint id);
+#endif
+
+#ifndef GL_ATI_meminfo
+#define GL_ATI_meminfo 1
+#endif
+
+#ifndef GL_AMD_performance_monitor
+#define GL_AMD_performance_monitor 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGetPerfMonitorGroupsAMD (GLint *numGroups, GLsizei groupsSize, GLuint *groups);
+GLAPI void APIENTRY glGetPerfMonitorCountersAMD (GLuint group, GLint *numCounters, GLint *maxActiveCounters, GLsizei counterSize, GLuint *counters);
+GLAPI void APIENTRY glGetPerfMonitorGroupStringAMD (GLuint group, GLsizei bufSize, GLsizei *length, GLchar *groupString);
+GLAPI void APIENTRY glGetPerfMonitorCounterStringAMD (GLuint group, GLuint counter, GLsizei bufSize, GLsizei *length, GLchar *counterString);
+GLAPI void APIENTRY glGetPerfMonitorCounterInfoAMD (GLuint group, GLuint counter, GLenum pname, GLvoid *data);
+GLAPI void APIENTRY glGenPerfMonitorsAMD (GLsizei n, GLuint *monitors);
+GLAPI void APIENTRY glDeletePerfMonitorsAMD (GLsizei n, GLuint *monitors);
+GLAPI void APIENTRY glSelectPerfMonitorCountersAMD (GLuint monitor, GLboolean enable, GLuint group, GLint numCounters, GLuint *counterList);
+GLAPI void APIENTRY glBeginPerfMonitorAMD (GLuint monitor);
+GLAPI void APIENTRY glEndPerfMonitorAMD (GLuint monitor);
+GLAPI void APIENTRY glGetPerfMonitorCounterDataAMD (GLuint monitor, GLenum pname, GLsizei dataSize, GLuint *data, GLint *bytesWritten);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGETPERFMONITORGROUPSAMDPROC) (GLint *numGroups, GLsizei groupsSize, GLuint *groups);
+typedef void (APIENTRYP PFNGLGETPERFMONITORCOUNTERSAMDPROC) (GLuint group, GLint *numCounters, GLint *maxActiveCounters, GLsizei counterSize, GLuint *counters);
+typedef void (APIENTRYP PFNGLGETPERFMONITORGROUPSTRINGAMDPROC) (GLuint group, GLsizei bufSize, GLsizei *length, GLchar *groupString);
+typedef void (APIENTRYP PFNGLGETPERFMONITORCOUNTERSTRINGAMDPROC) (GLuint group, GLuint counter, GLsizei bufSize, GLsizei *length, GLchar *counterString);
+typedef void (APIENTRYP PFNGLGETPERFMONITORCOUNTERINFOAMDPROC) (GLuint group, GLuint counter, GLenum pname, GLvoid *data);
+typedef void (APIENTRYP PFNGLGENPERFMONITORSAMDPROC) (GLsizei n, GLuint *monitors);
+typedef void (APIENTRYP PFNGLDELETEPERFMONITORSAMDPROC) (GLsizei n, GLuint *monitors);
+typedef void (APIENTRYP PFNGLSELECTPERFMONITORCOUNTERSAMDPROC) (GLuint monitor, GLboolean enable, GLuint group, GLint numCounters, GLuint *counterList);
+typedef void (APIENTRYP PFNGLBEGINPERFMONITORAMDPROC) (GLuint monitor);
+typedef void (APIENTRYP PFNGLENDPERFMONITORAMDPROC) (GLuint monitor);
+typedef void (APIENTRYP PFNGLGETPERFMONITORCOUNTERDATAAMDPROC) (GLuint monitor, GLenum pname, GLsizei dataSize, GLuint *data, GLint *bytesWritten);
+#endif
+
+#ifndef GL_AMD_texture_texture4
+#define GL_AMD_texture_texture4 1
+#endif
+
+#ifndef GL_AMD_vertex_shader_tesselator
+#define GL_AMD_vertex_shader_tesselator 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTessellationFactorAMD (GLfloat factor);
+GLAPI void APIENTRY glTessellationModeAMD (GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTESSELLATIONFACTORAMDPROC) (GLfloat factor);
+typedef void (APIENTRYP PFNGLTESSELLATIONMODEAMDPROC) (GLenum mode);
+#endif
+
+#ifndef GL_EXT_provoking_vertex
+#define GL_EXT_provoking_vertex 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProvokingVertexEXT (GLenum mode);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROVOKINGVERTEXEXTPROC) (GLenum mode);
+#endif
+
+#ifndef GL_EXT_texture_snorm
+#define GL_EXT_texture_snorm 1
+#endif
+
+#ifndef GL_AMD_draw_buffers_blend
+#define GL_AMD_draw_buffers_blend 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBlendFuncIndexedAMD (GLuint buf, GLenum src, GLenum dst);
+GLAPI void APIENTRY glBlendFuncSeparateIndexedAMD (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
+GLAPI void APIENTRY glBlendEquationIndexedAMD (GLuint buf, GLenum mode);
+GLAPI void APIENTRY glBlendEquationSeparateIndexedAMD (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBLENDFUNCINDEXEDAMDPROC) (GLuint buf, GLenum src, GLenum dst);
+typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEINDEXEDAMDPROC) (GLuint buf, GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
+typedef void (APIENTRYP PFNGLBLENDEQUATIONINDEXEDAMDPROC) (GLuint buf, GLenum mode);
+typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEINDEXEDAMDPROC) (GLuint buf, GLenum modeRGB, GLenum modeAlpha);
+#endif
+
+#ifndef GL_APPLE_texture_range
+#define GL_APPLE_texture_range 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTextureRangeAPPLE (GLenum target, GLsizei length, const GLvoid *pointer);
+GLAPI void APIENTRY glGetTexParameterPointervAPPLE (GLenum target, GLenum pname, GLvoid* *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXTURERANGEAPPLEPROC) (GLenum target, GLsizei length, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLGETTEXPARAMETERPOINTERVAPPLEPROC) (GLenum target, GLenum pname, GLvoid* *params);
+#endif
+
+#ifndef GL_APPLE_float_pixels
+#define GL_APPLE_float_pixels 1
+#endif
+
+#ifndef GL_APPLE_vertex_program_evaluators
+#define GL_APPLE_vertex_program_evaluators 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glEnableVertexAttribAPPLE (GLuint index, GLenum pname);
+GLAPI void APIENTRY glDisableVertexAttribAPPLE (GLuint index, GLenum pname);
+GLAPI GLboolean APIENTRY glIsVertexAttribEnabledAPPLE (GLuint index, GLenum pname);
+GLAPI void APIENTRY glMapVertexAttrib1dAPPLE (GLuint index, GLuint size, GLdouble u1, GLdouble u2, GLint stride, GLint order, const GLdouble *points);
+GLAPI void APIENTRY glMapVertexAttrib1fAPPLE (GLuint index, GLuint size, GLfloat u1, GLfloat u2, GLint stride, GLint order, const GLfloat *points);
+GLAPI void APIENTRY glMapVertexAttrib2dAPPLE (GLuint index, GLuint size, GLdouble u1, GLdouble u2, GLint ustride, GLint uorder, GLdouble v1, GLdouble v2, GLint vstride, GLint vorder, const GLdouble *points);
+GLAPI void APIENTRY glMapVertexAttrib2fAPPLE (GLuint index, GLuint size, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder, GLfloat v1, GLfloat v2, GLint vstride, GLint vorder, const GLfloat *points);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBAPPLEPROC) (GLuint index, GLenum pname);
+typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBAPPLEPROC) (GLuint index, GLenum pname);
+typedef GLboolean (APIENTRYP PFNGLISVERTEXATTRIBENABLEDAPPLEPROC) (GLuint index, GLenum pname);
+typedef void (APIENTRYP PFNGLMAPVERTEXATTRIB1DAPPLEPROC) (GLuint index, GLuint size, GLdouble u1, GLdouble u2, GLint stride, GLint order, const GLdouble *points);
+typedef void (APIENTRYP PFNGLMAPVERTEXATTRIB1FAPPLEPROC) (GLuint index, GLuint size, GLfloat u1, GLfloat u2, GLint stride, GLint order, const GLfloat *points);
+typedef void (APIENTRYP PFNGLMAPVERTEXATTRIB2DAPPLEPROC) (GLuint index, GLuint size, GLdouble u1, GLdouble u2, GLint ustride, GLint uorder, GLdouble v1, GLdouble v2, GLint vstride, GLint vorder, const GLdouble *points);
+typedef void (APIENTRYP PFNGLMAPVERTEXATTRIB2FAPPLEPROC) (GLuint index, GLuint size, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder, GLfloat v1, GLfloat v2, GLint vstride, GLint vorder, const GLfloat *points);
+#endif
+
+#ifndef GL_APPLE_aux_depth_stencil
+#define GL_APPLE_aux_depth_stencil 1
+#endif
+
+#ifndef GL_APPLE_object_purgeable
+#define GL_APPLE_object_purgeable 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI GLenum APIENTRY glObjectPurgeableAPPLE (GLenum objectType, GLuint name, GLenum option);
+GLAPI GLenum APIENTRY glObjectUnpurgeableAPPLE (GLenum objectType, GLuint name, GLenum option);
+GLAPI void APIENTRY glGetObjectParameterivAPPLE (GLenum objectType, GLuint name, GLenum pname, GLint *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef GLenum (APIENTRYP PFNGLOBJECTPURGEABLEAPPLEPROC) (GLenum objectType, GLuint name, GLenum option);
+typedef GLenum (APIENTRYP PFNGLOBJECTUNPURGEABLEAPPLEPROC) (GLenum objectType, GLuint name, GLenum option);
+typedef void (APIENTRYP PFNGLGETOBJECTPARAMETERIVAPPLEPROC) (GLenum objectType, GLuint name, GLenum pname, GLint *params);
+#endif
+
+#ifndef GL_APPLE_row_bytes
+#define GL_APPLE_row_bytes 1
+#endif
+
+#ifndef GL_APPLE_rgb_422
+#define GL_APPLE_rgb_422 1
+#endif
+
+#ifndef GL_NV_video_capture
+#define GL_NV_video_capture 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBeginVideoCaptureNV (GLuint video_capture_slot);
+GLAPI void APIENTRY glBindVideoCaptureStreamBufferNV (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLintptrARB offset);
+GLAPI void APIENTRY glBindVideoCaptureStreamTextureNV (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLenum target, GLuint texture);
+GLAPI void APIENTRY glEndVideoCaptureNV (GLuint video_capture_slot);
+GLAPI void APIENTRY glGetVideoCaptureivNV (GLuint video_capture_slot, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVideoCaptureStreamivNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLint *params);
+GLAPI void APIENTRY glGetVideoCaptureStreamfvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLfloat *params);
+GLAPI void APIENTRY glGetVideoCaptureStreamdvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, GLdouble *params);
+GLAPI GLenum APIENTRY glVideoCaptureNV (GLuint video_capture_slot, GLuint *sequence_num, GLuint64EXT *capture_time);
+GLAPI void APIENTRY glVideoCaptureStreamParameterivNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLint *params);
+GLAPI void APIENTRY glVideoCaptureStreamParameterfvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLfloat *params);
+GLAPI void APIENTRY glVideoCaptureStreamParameterdvNV (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLdouble *params);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBEGINVIDEOCAPTURENVPROC) (GLuint video_capture_slot);
+typedef void (APIENTRYP PFNGLBINDVIDEOCAPTURESTREAMBUFFERNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLintptrARB offset);
+typedef void (APIENTRYP PFNGLBINDVIDEOCAPTURESTREAMTEXTURENVPROC) (GLuint video_capture_slot, GLuint stream, GLenum frame_region, GLenum target, GLuint texture);
+typedef void (APIENTRYP PFNGLENDVIDEOCAPTURENVPROC) (GLuint video_capture_slot);
+typedef void (APIENTRYP PFNGLGETVIDEOCAPTUREIVNVPROC) (GLuint video_capture_slot, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVIDEOCAPTURESTREAMIVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, GLint *params);
+typedef void (APIENTRYP PFNGLGETVIDEOCAPTURESTREAMFVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, GLfloat *params);
+typedef void (APIENTRYP PFNGLGETVIDEOCAPTURESTREAMDVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, GLdouble *params);
+typedef GLenum (APIENTRYP PFNGLVIDEOCAPTURENVPROC) (GLuint video_capture_slot, GLuint *sequence_num, GLuint64EXT *capture_time);
+typedef void (APIENTRYP PFNGLVIDEOCAPTURESTREAMPARAMETERIVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLint *params);
+typedef void (APIENTRYP PFNGLVIDEOCAPTURESTREAMPARAMETERFVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLfloat *params);
+typedef void (APIENTRYP PFNGLVIDEOCAPTURESTREAMPARAMETERDVNVPROC) (GLuint video_capture_slot, GLuint stream, GLenum pname, const GLdouble *params);
+#endif
+
+#ifndef GL_NV_copy_image
+#define GL_NV_copy_image 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glCopyImageSubDataNV (GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLCOPYIMAGESUBDATANVPROC) (GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
+#endif
+
+#ifndef GL_EXT_separate_shader_objects
+#define GL_EXT_separate_shader_objects 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glUseShaderProgramEXT (GLenum type, GLuint program);
+GLAPI void APIENTRY glActiveProgramEXT (GLuint program);
+GLAPI GLuint APIENTRY glCreateShaderProgramEXT (GLenum type, const GLchar *string);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLUSESHADERPROGRAMEXTPROC) (GLenum type, GLuint program);
+typedef void (APIENTRYP PFNGLACTIVEPROGRAMEXTPROC) (GLuint program);
+typedef GLuint (APIENTRYP PFNGLCREATESHADERPROGRAMEXTPROC) (GLenum type, const GLchar *string);
+#endif
+
+#ifndef GL_NV_parameter_buffer_object2
+#define GL_NV_parameter_buffer_object2 1
+#endif
+
+#ifndef GL_NV_shader_buffer_load
+#define GL_NV_shader_buffer_load 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glMakeBufferResidentNV (GLenum target, GLenum access);
+GLAPI void APIENTRY glMakeBufferNonResidentNV (GLenum target);
+GLAPI GLboolean APIENTRY glIsBufferResidentNV (GLenum target);
+GLAPI void APIENTRY glMakeNamedBufferResidentNV (GLuint buffer, GLenum access);
+GLAPI void APIENTRY glMakeNamedBufferNonResidentNV (GLuint buffer);
+GLAPI GLboolean APIENTRY glIsNamedBufferResidentNV (GLuint buffer);
+GLAPI void APIENTRY glGetBufferParameterui64vNV (GLenum target, GLenum pname, GLuint64EXT *params);
+GLAPI void APIENTRY glGetNamedBufferParameterui64vNV (GLuint buffer, GLenum pname, GLuint64EXT *params);
+GLAPI void APIENTRY glGetIntegerui64vNV (GLenum value, GLuint64EXT *result);
+GLAPI void APIENTRY glUniformui64NV (GLint location, GLuint64EXT value);
+GLAPI void APIENTRY glUniformui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
+GLAPI void APIENTRY glGetUniformui64vNV (GLuint program, GLint location, GLuint64EXT *params);
+GLAPI void APIENTRY glProgramUniformui64NV (GLuint program, GLint location, GLuint64EXT value);
+GLAPI void APIENTRY glProgramUniformui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLMAKEBUFFERRESIDENTNVPROC) (GLenum target, GLenum access);
+typedef void (APIENTRYP PFNGLMAKEBUFFERNONRESIDENTNVPROC) (GLenum target);
+typedef GLboolean (APIENTRYP PFNGLISBUFFERRESIDENTNVPROC) (GLenum target);
+typedef void (APIENTRYP PFNGLMAKENAMEDBUFFERRESIDENTNVPROC) (GLuint buffer, GLenum access);
+typedef void (APIENTRYP PFNGLMAKENAMEDBUFFERNONRESIDENTNVPROC) (GLuint buffer);
+typedef GLboolean (APIENTRYP PFNGLISNAMEDBUFFERRESIDENTNVPROC) (GLuint buffer);
+typedef void (APIENTRYP PFNGLGETBUFFERPARAMETERUI64VNVPROC) (GLenum target, GLenum pname, GLuint64EXT *params);
+typedef void (APIENTRYP PFNGLGETNAMEDBUFFERPARAMETERUI64VNVPROC) (GLuint buffer, GLenum pname, GLuint64EXT *params);
+typedef void (APIENTRYP PFNGLGETINTEGERUI64VNVPROC) (GLenum value, GLuint64EXT *result);
+typedef void (APIENTRYP PFNGLUNIFORMUI64NVPROC) (GLint location, GLuint64EXT value);
+typedef void (APIENTRYP PFNGLUNIFORMUI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
+typedef void (APIENTRYP PFNGLGETUNIFORMUI64VNVPROC) (GLuint program, GLint location, GLuint64EXT *params);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMUI64NVPROC) (GLuint program, GLint location, GLuint64EXT value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORMUI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+#endif
+
+#ifndef GL_NV_vertex_buffer_unified_memory
+#define GL_NV_vertex_buffer_unified_memory 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBufferAddressRangeNV (GLenum pname, GLuint index, GLuint64EXT address, GLsizeiptr length);
+GLAPI void APIENTRY glVertexFormatNV (GLint size, GLenum type, GLsizei stride);
+GLAPI void APIENTRY glNormalFormatNV (GLenum type, GLsizei stride);
+GLAPI void APIENTRY glColorFormatNV (GLint size, GLenum type, GLsizei stride);
+GLAPI void APIENTRY glIndexFormatNV (GLenum type, GLsizei stride);
+GLAPI void APIENTRY glTexCoordFormatNV (GLint size, GLenum type, GLsizei stride);
+GLAPI void APIENTRY glEdgeFlagFormatNV (GLsizei stride);
+GLAPI void APIENTRY glSecondaryColorFormatNV (GLint size, GLenum type, GLsizei stride);
+GLAPI void APIENTRY glFogCoordFormatNV (GLenum type, GLsizei stride);
+GLAPI void APIENTRY glVertexAttribFormatNV (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride);
+GLAPI void APIENTRY glVertexAttribIFormatNV (GLuint index, GLint size, GLenum type, GLsizei stride);
+GLAPI void APIENTRY glGetIntegerui64i_vNV (GLenum value, GLuint index, GLuint64EXT *result);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBUFFERADDRESSRANGENVPROC) (GLenum pname, GLuint index, GLuint64EXT address, GLsizeiptr length);
+typedef void (APIENTRYP PFNGLVERTEXFORMATNVPROC) (GLint size, GLenum type, GLsizei stride);
+typedef void (APIENTRYP PFNGLNORMALFORMATNVPROC) (GLenum type, GLsizei stride);
+typedef void (APIENTRYP PFNGLCOLORFORMATNVPROC) (GLint size, GLenum type, GLsizei stride);
+typedef void (APIENTRYP PFNGLINDEXFORMATNVPROC) (GLenum type, GLsizei stride);
+typedef void (APIENTRYP PFNGLTEXCOORDFORMATNVPROC) (GLint size, GLenum type, GLsizei stride);
+typedef void (APIENTRYP PFNGLEDGEFLAGFORMATNVPROC) (GLsizei stride);
+typedef void (APIENTRYP PFNGLSECONDARYCOLORFORMATNVPROC) (GLint size, GLenum type, GLsizei stride);
+typedef void (APIENTRYP PFNGLFOGCOORDFORMATNVPROC) (GLenum type, GLsizei stride);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBFORMATNVPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBIFORMATNVPROC) (GLuint index, GLint size, GLenum type, GLsizei stride);
+typedef void (APIENTRYP PFNGLGETINTEGERUI64I_VNVPROC) (GLenum value, GLuint index, GLuint64EXT *result);
+#endif
+
+#ifndef GL_NV_texture_barrier
+#define GL_NV_texture_barrier 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glTextureBarrierNV (void);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLTEXTUREBARRIERNVPROC) (void);
+#endif
+
+#ifndef GL_AMD_shader_stencil_export
+#define GL_AMD_shader_stencil_export 1
+#endif
+
+#ifndef GL_AMD_seamless_cubemap_per_texture
+#define GL_AMD_seamless_cubemap_per_texture 1
+#endif
+
+#ifndef GL_AMD_conservative_depth
+#define GL_AMD_conservative_depth 1
+#endif
+
+#ifndef GL_EXT_shader_image_load_store
+#define GL_EXT_shader_image_load_store 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glBindImageTextureEXT (GLuint index, GLuint texture, GLint level, GLboolean layered, GLint layer, GLenum access, GLint format);
+GLAPI void APIENTRY glMemoryBarrierEXT (GLbitfield barriers);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLBINDIMAGETEXTUREEXTPROC) (GLuint index, GLuint texture, GLint level, GLboolean layered, GLint layer, GLenum access, GLint format);
+typedef void (APIENTRYP PFNGLMEMORYBARRIEREXTPROC) (GLbitfield barriers);
+#endif
+
+#ifndef GL_EXT_vertex_attrib_64bit
+#define GL_EXT_vertex_attrib_64bit 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexAttribL1dEXT (GLuint index, GLdouble x);
+GLAPI void APIENTRY glVertexAttribL2dEXT (GLuint index, GLdouble x, GLdouble y);
+GLAPI void APIENTRY glVertexAttribL3dEXT (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+GLAPI void APIENTRY glVertexAttribL4dEXT (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+GLAPI void APIENTRY glVertexAttribL1dvEXT (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribL2dvEXT (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribL3dvEXT (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribL4dvEXT (GLuint index, const GLdouble *v);
+GLAPI void APIENTRY glVertexAttribLPointerEXT (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+GLAPI void APIENTRY glGetVertexAttribLdvEXT (GLuint index, GLenum pname, GLdouble *params);
+GLAPI void APIENTRY glVertexArrayVertexAttribLOffsetEXT (GLuint vaobj, GLuint buffer, GLuint index, GLint size, GLenum type, GLsizei stride, GLintptr offset);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DEXTPROC) (GLuint index, GLdouble x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DEXTPROC) (GLuint index, GLdouble x, GLdouble y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DEXTPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DEXTPROC) (GLuint index, GLdouble x, GLdouble y, GLdouble z, GLdouble w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1DVEXTPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2DVEXTPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3DVEXTPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4DVEXTPROC) (GLuint index, const GLdouble *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBLPOINTEREXTPROC) (GLuint index, GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLDVEXTPROC) (GLuint index, GLenum pname, GLdouble *params);
+typedef void (APIENTRYP PFNGLVERTEXARRAYVERTEXATTRIBLOFFSETEXTPROC) (GLuint vaobj, GLuint buffer, GLuint index, GLint size, GLenum type, GLsizei stride, GLintptr offset);
+#endif
+
+#ifndef GL_NV_gpu_program5
+#define GL_NV_gpu_program5 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glProgramSubroutineParametersuivNV (GLenum target, GLsizei count, const GLuint *params);
+GLAPI void APIENTRY glGetProgramSubroutineParameteruivNV (GLenum target, GLuint index, GLuint *param);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLPROGRAMSUBROUTINEPARAMETERSUIVNVPROC) (GLenum target, GLsizei count, const GLuint *params);
+typedef void (APIENTRYP PFNGLGETPROGRAMSUBROUTINEPARAMETERUIVNVPROC) (GLenum target, GLuint index, GLuint *param);
+#endif
+
+#ifndef GL_NV_gpu_shader5
+#define GL_NV_gpu_shader5 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glUniform1i64NV (GLint location, GLint64EXT x);
+GLAPI void APIENTRY glUniform2i64NV (GLint location, GLint64EXT x, GLint64EXT y);
+GLAPI void APIENTRY glUniform3i64NV (GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z);
+GLAPI void APIENTRY glUniform4i64NV (GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
+GLAPI void APIENTRY glUniform1i64vNV (GLint location, GLsizei count, const GLint64EXT *value);
+GLAPI void APIENTRY glUniform2i64vNV (GLint location, GLsizei count, const GLint64EXT *value);
+GLAPI void APIENTRY glUniform3i64vNV (GLint location, GLsizei count, const GLint64EXT *value);
+GLAPI void APIENTRY glUniform4i64vNV (GLint location, GLsizei count, const GLint64EXT *value);
+GLAPI void APIENTRY glUniform1ui64NV (GLint location, GLuint64EXT x);
+GLAPI void APIENTRY glUniform2ui64NV (GLint location, GLuint64EXT x, GLuint64EXT y);
+GLAPI void APIENTRY glUniform3ui64NV (GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
+GLAPI void APIENTRY glUniform4ui64NV (GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
+GLAPI void APIENTRY glUniform1ui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
+GLAPI void APIENTRY glUniform2ui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
+GLAPI void APIENTRY glUniform3ui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
+GLAPI void APIENTRY glUniform4ui64vNV (GLint location, GLsizei count, const GLuint64EXT *value);
+GLAPI void APIENTRY glGetUniformi64vNV (GLuint program, GLint location, GLint64EXT *params);
+GLAPI void APIENTRY glProgramUniform1i64NV (GLuint program, GLint location, GLint64EXT x);
+GLAPI void APIENTRY glProgramUniform2i64NV (GLuint program, GLint location, GLint64EXT x, GLint64EXT y);
+GLAPI void APIENTRY glProgramUniform3i64NV (GLuint program, GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z);
+GLAPI void APIENTRY glProgramUniform4i64NV (GLuint program, GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
+GLAPI void APIENTRY glProgramUniform1i64vNV (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
+GLAPI void APIENTRY glProgramUniform2i64vNV (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
+GLAPI void APIENTRY glProgramUniform3i64vNV (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
+GLAPI void APIENTRY glProgramUniform4i64vNV (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
+GLAPI void APIENTRY glProgramUniform1ui64NV (GLuint program, GLint location, GLuint64EXT x);
+GLAPI void APIENTRY glProgramUniform2ui64NV (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y);
+GLAPI void APIENTRY glProgramUniform3ui64NV (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
+GLAPI void APIENTRY glProgramUniform4ui64NV (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
+GLAPI void APIENTRY glProgramUniform1ui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+GLAPI void APIENTRY glProgramUniform2ui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+GLAPI void APIENTRY glProgramUniform3ui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+GLAPI void APIENTRY glProgramUniform4ui64vNV (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLUNIFORM1I64NVPROC) (GLint location, GLint64EXT x);
+typedef void (APIENTRYP PFNGLUNIFORM2I64NVPROC) (GLint location, GLint64EXT x, GLint64EXT y);
+typedef void (APIENTRYP PFNGLUNIFORM3I64NVPROC) (GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z);
+typedef void (APIENTRYP PFNGLUNIFORM4I64NVPROC) (GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
+typedef void (APIENTRYP PFNGLUNIFORM1I64VNVPROC) (GLint location, GLsizei count, const GLint64EXT *value);
+typedef void (APIENTRYP PFNGLUNIFORM2I64VNVPROC) (GLint location, GLsizei count, const GLint64EXT *value);
+typedef void (APIENTRYP PFNGLUNIFORM3I64VNVPROC) (GLint location, GLsizei count, const GLint64EXT *value);
+typedef void (APIENTRYP PFNGLUNIFORM4I64VNVPROC) (GLint location, GLsizei count, const GLint64EXT *value);
+typedef void (APIENTRYP PFNGLUNIFORM1UI64NVPROC) (GLint location, GLuint64EXT x);
+typedef void (APIENTRYP PFNGLUNIFORM2UI64NVPROC) (GLint location, GLuint64EXT x, GLuint64EXT y);
+typedef void (APIENTRYP PFNGLUNIFORM3UI64NVPROC) (GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
+typedef void (APIENTRYP PFNGLUNIFORM4UI64NVPROC) (GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
+typedef void (APIENTRYP PFNGLUNIFORM1UI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
+typedef void (APIENTRYP PFNGLUNIFORM2UI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
+typedef void (APIENTRYP PFNGLUNIFORM3UI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
+typedef void (APIENTRYP PFNGLUNIFORM4UI64VNVPROC) (GLint location, GLsizei count, const GLuint64EXT *value);
+typedef void (APIENTRYP PFNGLGETUNIFORMI64VNVPROC) (GLuint program, GLint location, GLint64EXT *params);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1I64NVPROC) (GLuint program, GLint location, GLint64EXT x);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2I64NVPROC) (GLuint program, GLint location, GLint64EXT x, GLint64EXT y);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3I64NVPROC) (GLuint program, GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4I64NVPROC) (GLuint program, GLint location, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1I64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2I64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3I64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4I64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLint64EXT *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UI64NVPROC) (GLuint program, GLint location, GLuint64EXT x);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UI64NVPROC) (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UI64NVPROC) (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UI64NVPROC) (GLuint program, GLint location, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM1UI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM2UI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM3UI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+typedef void (APIENTRYP PFNGLPROGRAMUNIFORM4UI64VNVPROC) (GLuint program, GLint location, GLsizei count, const GLuint64EXT *value);
+#endif
+
+#ifndef GL_NV_shader_buffer_store
+#define GL_NV_shader_buffer_store 1
+#endif
+
+#ifndef GL_NV_tessellation_program5
+#define GL_NV_tessellation_program5 1
+#endif
+
+#ifndef GL_NV_vertex_attrib_integer_64bit
+#define GL_NV_vertex_attrib_integer_64bit 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVertexAttribL1i64NV (GLuint index, GLint64EXT x);
+GLAPI void APIENTRY glVertexAttribL2i64NV (GLuint index, GLint64EXT x, GLint64EXT y);
+GLAPI void APIENTRY glVertexAttribL3i64NV (GLuint index, GLint64EXT x, GLint64EXT y, GLint64EXT z);
+GLAPI void APIENTRY glVertexAttribL4i64NV (GLuint index, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
+GLAPI void APIENTRY glVertexAttribL1i64vNV (GLuint index, const GLint64EXT *v);
+GLAPI void APIENTRY glVertexAttribL2i64vNV (GLuint index, const GLint64EXT *v);
+GLAPI void APIENTRY glVertexAttribL3i64vNV (GLuint index, const GLint64EXT *v);
+GLAPI void APIENTRY glVertexAttribL4i64vNV (GLuint index, const GLint64EXT *v);
+GLAPI void APIENTRY glVertexAttribL1ui64NV (GLuint index, GLuint64EXT x);
+GLAPI void APIENTRY glVertexAttribL2ui64NV (GLuint index, GLuint64EXT x, GLuint64EXT y);
+GLAPI void APIENTRY glVertexAttribL3ui64NV (GLuint index, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
+GLAPI void APIENTRY glVertexAttribL4ui64NV (GLuint index, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
+GLAPI void APIENTRY glVertexAttribL1ui64vNV (GLuint index, const GLuint64EXT *v);
+GLAPI void APIENTRY glVertexAttribL2ui64vNV (GLuint index, const GLuint64EXT *v);
+GLAPI void APIENTRY glVertexAttribL3ui64vNV (GLuint index, const GLuint64EXT *v);
+GLAPI void APIENTRY glVertexAttribL4ui64vNV (GLuint index, const GLuint64EXT *v);
+GLAPI void APIENTRY glGetVertexAttribLi64vNV (GLuint index, GLenum pname, GLint64EXT *params);
+GLAPI void APIENTRY glGetVertexAttribLui64vNV (GLuint index, GLenum pname, GLuint64EXT *params);
+GLAPI void APIENTRY glVertexAttribLFormatNV (GLuint index, GLint size, GLenum type, GLsizei stride);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1I64NVPROC) (GLuint index, GLint64EXT x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2I64NVPROC) (GLuint index, GLint64EXT x, GLint64EXT y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3I64NVPROC) (GLuint index, GLint64EXT x, GLint64EXT y, GLint64EXT z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4I64NVPROC) (GLuint index, GLint64EXT x, GLint64EXT y, GLint64EXT z, GLint64EXT w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1I64VNVPROC) (GLuint index, const GLint64EXT *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2I64VNVPROC) (GLuint index, const GLint64EXT *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3I64VNVPROC) (GLuint index, const GLint64EXT *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4I64VNVPROC) (GLuint index, const GLint64EXT *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1UI64NVPROC) (GLuint index, GLuint64EXT x);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2UI64NVPROC) (GLuint index, GLuint64EXT x, GLuint64EXT y);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3UI64NVPROC) (GLuint index, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4UI64NVPROC) (GLuint index, GLuint64EXT x, GLuint64EXT y, GLuint64EXT z, GLuint64EXT w);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL1UI64VNVPROC) (GLuint index, const GLuint64EXT *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL2UI64VNVPROC) (GLuint index, const GLuint64EXT *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL3UI64VNVPROC) (GLuint index, const GLuint64EXT *v);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBL4UI64VNVPROC) (GLuint index, const GLuint64EXT *v);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLI64VNVPROC) (GLuint index, GLenum pname, GLint64EXT *params);
+typedef void (APIENTRYP PFNGLGETVERTEXATTRIBLUI64VNVPROC) (GLuint index, GLenum pname, GLuint64EXT *params);
+typedef void (APIENTRYP PFNGLVERTEXATTRIBLFORMATNVPROC) (GLuint index, GLint size, GLenum type, GLsizei stride);
+#endif
+
+#ifndef GL_NV_multisample_coverage
+#define GL_NV_multisample_coverage 1
+#endif
+
+#ifndef GL_AMD_name_gen_delete
+#define GL_AMD_name_gen_delete 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glGenNamesAMD (GLenum identifier, GLuint num, GLuint *names);
+GLAPI void APIENTRY glDeleteNamesAMD (GLenum identifier, GLuint num, const GLuint *names);
+GLAPI GLboolean APIENTRY glIsNameAMD (GLenum identifier, GLuint name);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLGENNAMESAMDPROC) (GLenum identifier, GLuint num, GLuint *names);
+typedef void (APIENTRYP PFNGLDELETENAMESAMDPROC) (GLenum identifier, GLuint num, const GLuint *names);
+typedef GLboolean (APIENTRYP PFNGLISNAMEAMDPROC) (GLenum identifier, GLuint name);
+#endif
+
+#ifndef GL_AMD_debug_output
+#define GL_AMD_debug_output 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glDebugMessageEnableAMD (GLenum category, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
+GLAPI void APIENTRY glDebugMessageInsertAMD (GLenum category, GLenum severity, GLuint id, GLsizei length, const GLchar *buf);
+GLAPI void APIENTRY glDebugMessageCallbackAMD (GLDEBUGPROCAMD callback, GLvoid *userParam);
+GLAPI GLuint APIENTRY glGetDebugMessageLogAMD (GLuint count, GLsizei bufsize, GLenum *categories, GLuint *severities, GLuint *ids, GLsizei *lengths, GLchar *message);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLDEBUGMESSAGEENABLEAMDPROC) (GLenum category, GLenum severity, GLsizei count, const GLuint *ids, GLboolean enabled);
+typedef void (APIENTRYP PFNGLDEBUGMESSAGEINSERTAMDPROC) (GLenum category, GLenum severity, GLuint id, GLsizei length, const GLchar *buf);
+typedef void (APIENTRYP PFNGLDEBUGMESSAGECALLBACKAMDPROC) (GLDEBUGPROCAMD callback, GLvoid *userParam);
+typedef GLuint (APIENTRYP PFNGLGETDEBUGMESSAGELOGAMDPROC) (GLuint count, GLsizei bufsize, GLenum *categories, GLuint *severities, GLuint *ids, GLsizei *lengths, GLchar *message);
+#endif
+
+#ifndef GL_NV_vdpau_interop
+#define GL_NV_vdpau_interop 1
+#ifdef GL_GLEXT_PROTOTYPES
+GLAPI void APIENTRY glVDPAUInitNV (const GLvoid *vdpDevice, const GLvoid *getProcAddress);
+GLAPI void APIENTRY glVDPAUFiniNV (void);
+GLAPI GLvdpauSurfaceNV APIENTRY glVDPAURegisterVideoSurfaceNV (GLvoid *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
+GLAPI GLvdpauSurfaceNV APIENTRY glVDPAURegisterOutputSurfaceNV (GLvoid *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
+GLAPI void APIENTRY glVDPAUIsSurfaceNV (GLvdpauSurfaceNV surface);
+GLAPI void APIENTRY glVDPAUUnregisterSurfaceNV (GLvdpauSurfaceNV surface);
+GLAPI void APIENTRY glVDPAUGetSurfaceivNV (GLvdpauSurfaceNV surface, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
+GLAPI void APIENTRY glVDPAUSurfaceAccessNV (GLvdpauSurfaceNV surface, GLenum access);
+GLAPI void APIENTRY glVDPAUMapSurfacesNV (GLsizei numSurfaces, const GLvdpauSurfaceNV *surfaces);
+GLAPI void APIENTRY glVDPAUUnmapSurfacesNV (GLsizei numSurface, const GLvdpauSurfaceNV *surfaces);
+#endif /* GL_GLEXT_PROTOTYPES */
+typedef void (APIENTRYP PFNGLVDPAUINITNVPROC) (const GLvoid *vdpDevice, const GLvoid *getProcAddress);
+typedef void (APIENTRYP PFNGLVDPAUFININVPROC) (void);
+typedef GLvdpauSurfaceNV (APIENTRYP PFNGLVDPAUREGISTERVIDEOSURFACENVPROC) (GLvoid *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
+typedef GLvdpauSurfaceNV (APIENTRYP PFNGLVDPAUREGISTEROUTPUTSURFACENVPROC) (GLvoid *vdpSurface, GLenum target, GLsizei numTextureNames, const GLuint *textureNames);
+typedef void (APIENTRYP PFNGLVDPAUISSURFACENVPROC) (GLvdpauSurfaceNV surface);
+typedef void (APIENTRYP PFNGLVDPAUUNREGISTERSURFACENVPROC) (GLvdpauSurfaceNV surface);
+typedef void (APIENTRYP PFNGLVDPAUGETSURFACEIVNVPROC) (GLvdpauSurfaceNV surface, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
+typedef void (APIENTRYP PFNGLVDPAUSURFACEACCESSNVPROC) (GLvdpauSurfaceNV surface, GLenum access);
+typedef void (APIENTRYP PFNGLVDPAUMAPSURFACESNVPROC) (GLsizei numSurfaces, const GLvdpauSurfaceNV *surfaces);
+typedef void (APIENTRYP PFNGLVDPAUUNMAPSURFACESNVPROC) (GLsizei numSurface, const GLvdpauSurfaceNV *surfaces);
+#endif
+
+#ifndef GL_AMD_transform_feedback3_lines_triangles
+#define GL_AMD_transform_feedback3_lines_triangles 1
+#endif
+
+#ifndef GL_AMD_depth_clamp_separate
+#define GL_AMD_depth_clamp_separate 1
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+#ifndef __glxext_h_
+#define __glxext_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+** Copyright (c) 2007-2010 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Function declaration macros - to move into glplatform.h */
+
+#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
+#define WIN32_LEAN_AND_MEAN 1
+#include <windows.h>
+#endif
+
+#ifndef APIENTRY
+#define APIENTRY
+#endif
+#ifndef APIENTRYP
+#define APIENTRYP APIENTRY *
+#endif
+#ifndef GLAPI
+#define GLAPI extern
+#endif
+
+/*************************************************************/
+
+/* Header file version number, required by OpenGL ABI for Linux */
+/* glxext.h last updated 2010/08/06 */
+/* Current version at http://www.opengl.org/registry/ */
+#define GLX_GLXEXT_VERSION 32
+
+#ifndef GLX_VERSION_1_3
+#define GLX_WINDOW_BIT 0x00000001
+#define GLX_PIXMAP_BIT 0x00000002
+#define GLX_PBUFFER_BIT 0x00000004
+#define GLX_RGBA_BIT 0x00000001
+#define GLX_COLOR_INDEX_BIT 0x00000002
+#define GLX_PBUFFER_CLOBBER_MASK 0x08000000
+#define GLX_FRONT_LEFT_BUFFER_BIT 0x00000001
+#define GLX_FRONT_RIGHT_BUFFER_BIT 0x00000002
+#define GLX_BACK_LEFT_BUFFER_BIT 0x00000004
+#define GLX_BACK_RIGHT_BUFFER_BIT 0x00000008
+#define GLX_AUX_BUFFERS_BIT 0x00000010
+#define GLX_DEPTH_BUFFER_BIT 0x00000020
+#define GLX_STENCIL_BUFFER_BIT 0x00000040
+#define GLX_ACCUM_BUFFER_BIT 0x00000080
+#define GLX_CONFIG_CAVEAT 0x20
+#define GLX_X_VISUAL_TYPE 0x22
+#define GLX_TRANSPARENT_TYPE 0x23
+#define GLX_TRANSPARENT_INDEX_VALUE 0x24
+#define GLX_TRANSPARENT_RED_VALUE 0x25
+#define GLX_TRANSPARENT_GREEN_VALUE 0x26
+#define GLX_TRANSPARENT_BLUE_VALUE 0x27
+#define GLX_TRANSPARENT_ALPHA_VALUE 0x28
+#define GLX_DONT_CARE 0xFFFFFFFF
+#define GLX_NONE 0x8000
+#define GLX_SLOW_CONFIG 0x8001
+#define GLX_TRUE_COLOR 0x8002
+#define GLX_DIRECT_COLOR 0x8003
+#define GLX_PSEUDO_COLOR 0x8004
+#define GLX_STATIC_COLOR 0x8005
+#define GLX_GRAY_SCALE 0x8006
+#define GLX_STATIC_GRAY 0x8007
+#define GLX_TRANSPARENT_RGB 0x8008
+#define GLX_TRANSPARENT_INDEX 0x8009
+#define GLX_VISUAL_ID 0x800B
+#define GLX_SCREEN 0x800C
+#define GLX_NON_CONFORMANT_CONFIG 0x800D
+#define GLX_DRAWABLE_TYPE 0x8010
+#define GLX_RENDER_TYPE 0x8011
+#define GLX_X_RENDERABLE 0x8012
+#define GLX_FBCONFIG_ID 0x8013
+#define GLX_RGBA_TYPE 0x8014
+#define GLX_COLOR_INDEX_TYPE 0x8015
+#define GLX_MAX_PBUFFER_WIDTH 0x8016
+#define GLX_MAX_PBUFFER_HEIGHT 0x8017
+#define GLX_MAX_PBUFFER_PIXELS 0x8018
+#define GLX_PRESERVED_CONTENTS 0x801B
+#define GLX_LARGEST_PBUFFER 0x801C
+#define GLX_WIDTH 0x801D
+#define GLX_HEIGHT 0x801E
+#define GLX_EVENT_MASK 0x801F
+#define GLX_DAMAGED 0x8020
+#define GLX_SAVED 0x8021
+#define GLX_WINDOW 0x8022
+#define GLX_PBUFFER 0x8023
+#define GLX_PBUFFER_HEIGHT 0x8040
+#define GLX_PBUFFER_WIDTH 0x8041
+#endif
+
+#ifndef GLX_VERSION_1_4
+#define GLX_SAMPLE_BUFFERS 100000
+#define GLX_SAMPLES 100001
+#endif
+
+#ifndef GLX_ARB_get_proc_address
+#endif
+
+#ifndef GLX_ARB_multisample
+#define GLX_SAMPLE_BUFFERS_ARB 100000
+#define GLX_SAMPLES_ARB 100001
+#endif
+
+#ifndef GLX_ARB_vertex_buffer_object
+#define GLX_CONTEXT_ALLOW_BUFFER_BYTE_ORDER_MISMATCH_ARB 0x2095
+#endif
+
+#ifndef GLX_ARB_fbconfig_float
+#define GLX_RGBA_FLOAT_TYPE_ARB 0x20B9
+#define GLX_RGBA_FLOAT_BIT_ARB 0x00000004
+#endif
+
+#ifndef GLX_ARB_framebuffer_sRGB
+#define GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20B2
+#endif
+
+#ifndef GLX_ARB_create_context
+#define GLX_CONTEXT_DEBUG_BIT_ARB 0x00000001
+#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
+#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
+#define GLX_CONTEXT_FLAGS_ARB 0x2094
+#endif
+
+#ifndef GLX_ARB_create_context_profile
+#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
+#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
+#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
+#endif
+
+#ifndef GLX_ARB_create_context_robustness
+#define GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB 0x00000004
+#define GLX_LOSE_CONTEXT_ON_RESET_ARB 0x8252
+#define GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
+#define GLX_NO_RESET_NOTIFICATION_ARB 0x8261
+#endif
+
+#ifndef GLX_SGIS_multisample
+#define GLX_SAMPLE_BUFFERS_SGIS 100000
+#define GLX_SAMPLES_SGIS 100001
+#endif
+
+#ifndef GLX_EXT_visual_info
+#define GLX_X_VISUAL_TYPE_EXT 0x22
+#define GLX_TRANSPARENT_TYPE_EXT 0x23
+#define GLX_TRANSPARENT_INDEX_VALUE_EXT 0x24
+#define GLX_TRANSPARENT_RED_VALUE_EXT 0x25
+#define GLX_TRANSPARENT_GREEN_VALUE_EXT 0x26
+#define GLX_TRANSPARENT_BLUE_VALUE_EXT 0x27
+#define GLX_TRANSPARENT_ALPHA_VALUE_EXT 0x28
+#define GLX_NONE_EXT 0x8000
+#define GLX_TRUE_COLOR_EXT 0x8002
+#define GLX_DIRECT_COLOR_EXT 0x8003
+#define GLX_PSEUDO_COLOR_EXT 0x8004
+#define GLX_STATIC_COLOR_EXT 0x8005
+#define GLX_GRAY_SCALE_EXT 0x8006
+#define GLX_STATIC_GRAY_EXT 0x8007
+#define GLX_TRANSPARENT_RGB_EXT 0x8008
+#define GLX_TRANSPARENT_INDEX_EXT 0x8009
+#endif
+
+#ifndef GLX_SGI_swap_control
+#endif
+
+#ifndef GLX_SGI_video_sync
+#endif
+
+#ifndef GLX_SGI_make_current_read
+#endif
+
+#ifndef GLX_SGIX_video_source
+#endif
+
+#ifndef GLX_EXT_visual_rating
+#define GLX_VISUAL_CAVEAT_EXT 0x20
+#define GLX_SLOW_VISUAL_EXT 0x8001
+#define GLX_NON_CONFORMANT_VISUAL_EXT 0x800D
+/* reuse GLX_NONE_EXT */
+#endif
+
+#ifndef GLX_EXT_import_context
+#define GLX_SHARE_CONTEXT_EXT 0x800A
+#define GLX_VISUAL_ID_EXT 0x800B
+#define GLX_SCREEN_EXT 0x800C
+#endif
+
+#ifndef GLX_SGIX_fbconfig
+#define GLX_WINDOW_BIT_SGIX 0x00000001
+#define GLX_PIXMAP_BIT_SGIX 0x00000002
+#define GLX_RGBA_BIT_SGIX 0x00000001
+#define GLX_COLOR_INDEX_BIT_SGIX 0x00000002
+#define GLX_DRAWABLE_TYPE_SGIX 0x8010
+#define GLX_RENDER_TYPE_SGIX 0x8011
+#define GLX_X_RENDERABLE_SGIX 0x8012
+#define GLX_FBCONFIG_ID_SGIX 0x8013
+#define GLX_RGBA_TYPE_SGIX 0x8014
+#define GLX_COLOR_INDEX_TYPE_SGIX 0x8015
+/* reuse GLX_SCREEN_EXT */
+#endif
+
+#ifndef GLX_SGIX_pbuffer
+#define GLX_PBUFFER_BIT_SGIX 0x00000004
+#define GLX_BUFFER_CLOBBER_MASK_SGIX 0x08000000
+#define GLX_FRONT_LEFT_BUFFER_BIT_SGIX 0x00000001
+#define GLX_FRONT_RIGHT_BUFFER_BIT_SGIX 0x00000002
+#define GLX_BACK_LEFT_BUFFER_BIT_SGIX 0x00000004
+#define GLX_BACK_RIGHT_BUFFER_BIT_SGIX 0x00000008
+#define GLX_AUX_BUFFERS_BIT_SGIX 0x00000010
+#define GLX_DEPTH_BUFFER_BIT_SGIX 0x00000020
+#define GLX_STENCIL_BUFFER_BIT_SGIX 0x00000040
+#define GLX_ACCUM_BUFFER_BIT_SGIX 0x00000080
+#define GLX_SAMPLE_BUFFERS_BIT_SGIX 0x00000100
+#define GLX_MAX_PBUFFER_WIDTH_SGIX 0x8016
+#define GLX_MAX_PBUFFER_HEIGHT_SGIX 0x8017
+#define GLX_MAX_PBUFFER_PIXELS_SGIX 0x8018
+#define GLX_OPTIMAL_PBUFFER_WIDTH_SGIX 0x8019
+#define GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX 0x801A
+#define GLX_PRESERVED_CONTENTS_SGIX 0x801B
+#define GLX_LARGEST_PBUFFER_SGIX 0x801C
+#define GLX_WIDTH_SGIX 0x801D
+#define GLX_HEIGHT_SGIX 0x801E
+#define GLX_EVENT_MASK_SGIX 0x801F
+#define GLX_DAMAGED_SGIX 0x8020
+#define GLX_SAVED_SGIX 0x8021
+#define GLX_WINDOW_SGIX 0x8022
+#define GLX_PBUFFER_SGIX 0x8023
+#endif
+
+#ifndef GLX_SGI_cushion
+#endif
+
+#ifndef GLX_SGIX_video_resize
+#define GLX_SYNC_FRAME_SGIX 0x00000000
+#define GLX_SYNC_SWAP_SGIX 0x00000001
+#endif
+
+#ifndef GLX_SGIX_dmbuffer
+#define GLX_DIGITAL_MEDIA_PBUFFER_SGIX 0x8024
+#endif
+
+#ifndef GLX_SGIX_swap_group
+#endif
+
+#ifndef GLX_SGIX_swap_barrier
+#endif
+
+#ifndef GLX_SGIS_blended_overlay
+#define GLX_BLENDED_RGBA_SGIS 0x8025
+#endif
+
+#ifndef GLX_SGIS_shared_multisample
+#define GLX_MULTISAMPLE_SUB_RECT_WIDTH_SGIS 0x8026
+#define GLX_MULTISAMPLE_SUB_RECT_HEIGHT_SGIS 0x8027
+#endif
+
+#ifndef GLX_SUN_get_transparent_index
+#endif
+
+#ifndef GLX_3DFX_multisample
+#define GLX_SAMPLE_BUFFERS_3DFX 0x8050
+#define GLX_SAMPLES_3DFX 0x8051
+#endif
+
+#ifndef GLX_MESA_copy_sub_buffer
+#endif
+
+#ifndef GLX_MESA_pixmap_colormap
+#endif
+
+#ifndef GLX_MESA_release_buffers
+#endif
+
+#ifndef GLX_MESA_set_3dfx_mode
+#define GLX_3DFX_WINDOW_MODE_MESA 0x1
+#define GLX_3DFX_FULLSCREEN_MODE_MESA 0x2
+#endif
+
+#ifndef GLX_SGIX_visual_select_group
+#define GLX_VISUAL_SELECT_GROUP_SGIX 0x8028
+#endif
+
+#ifndef GLX_OML_swap_method
+#define GLX_SWAP_METHOD_OML 0x8060
+#define GLX_SWAP_EXCHANGE_OML 0x8061
+#define GLX_SWAP_COPY_OML 0x8062
+#define GLX_SWAP_UNDEFINED_OML 0x8063
+#endif
+
+#ifndef GLX_OML_sync_control
+#endif
+
+#ifndef GLX_NV_float_buffer
+#define GLX_FLOAT_COMPONENTS_NV 0x20B0
+#endif
+
+#ifndef GLX_SGIX_hyperpipe
+#define GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX 80
+#define GLX_BAD_HYPERPIPE_CONFIG_SGIX 91
+#define GLX_BAD_HYPERPIPE_SGIX 92
+#define GLX_HYPERPIPE_DISPLAY_PIPE_SGIX 0x00000001
+#define GLX_HYPERPIPE_RENDER_PIPE_SGIX 0x00000002
+#define GLX_PIPE_RECT_SGIX 0x00000001
+#define GLX_PIPE_RECT_LIMITS_SGIX 0x00000002
+#define GLX_HYPERPIPE_STEREO_SGIX 0x00000003
+#define GLX_HYPERPIPE_PIXEL_AVERAGE_SGIX 0x00000004
+#define GLX_HYPERPIPE_ID_SGIX 0x8030
+#endif
+
+#ifndef GLX_MESA_agp_offset
+#endif
+
+#ifndef GLX_EXT_fbconfig_packed_float
+#define GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT 0x20B1
+#define GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT 0x00000008
+#endif
+
+#ifndef GLX_EXT_framebuffer_sRGB
+#define GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x20B2
+#endif
+
+#ifndef GLX_EXT_texture_from_pixmap
+#define GLX_TEXTURE_1D_BIT_EXT 0x00000001
+#define GLX_TEXTURE_2D_BIT_EXT 0x00000002
+#define GLX_TEXTURE_RECTANGLE_BIT_EXT 0x00000004
+#define GLX_BIND_TO_TEXTURE_RGB_EXT 0x20D0
+#define GLX_BIND_TO_TEXTURE_RGBA_EXT 0x20D1
+#define GLX_BIND_TO_MIPMAP_TEXTURE_EXT 0x20D2
+#define GLX_BIND_TO_TEXTURE_TARGETS_EXT 0x20D3
+#define GLX_Y_INVERTED_EXT 0x20D4
+#define GLX_TEXTURE_FORMAT_EXT 0x20D5
+#define GLX_TEXTURE_TARGET_EXT 0x20D6
+#define GLX_MIPMAP_TEXTURE_EXT 0x20D7
+#define GLX_TEXTURE_FORMAT_NONE_EXT 0x20D8
+#define GLX_TEXTURE_FORMAT_RGB_EXT 0x20D9
+#define GLX_TEXTURE_FORMAT_RGBA_EXT 0x20DA
+#define GLX_TEXTURE_1D_EXT 0x20DB
+#define GLX_TEXTURE_2D_EXT 0x20DC
+#define GLX_TEXTURE_RECTANGLE_EXT 0x20DD
+#define GLX_FRONT_LEFT_EXT 0x20DE
+#define GLX_FRONT_RIGHT_EXT 0x20DF
+#define GLX_BACK_LEFT_EXT 0x20E0
+#define GLX_BACK_RIGHT_EXT 0x20E1
+#define GLX_FRONT_EXT GLX_FRONT_LEFT_EXT
+#define GLX_BACK_EXT GLX_BACK_LEFT_EXT
+#define GLX_AUX0_EXT 0x20E2
+#define GLX_AUX1_EXT 0x20E3
+#define GLX_AUX2_EXT 0x20E4
+#define GLX_AUX3_EXT 0x20E5
+#define GLX_AUX4_EXT 0x20E6
+#define GLX_AUX5_EXT 0x20E7
+#define GLX_AUX6_EXT 0x20E8
+#define GLX_AUX7_EXT 0x20E9
+#define GLX_AUX8_EXT 0x20EA
+#define GLX_AUX9_EXT 0x20EB
+#endif
+
+#ifndef GLX_NV_present_video
+#define GLX_NUM_VIDEO_SLOTS_NV 0x20F0
+#endif
+
+#ifndef GLX_NV_video_out
+#define GLX_VIDEO_OUT_COLOR_NV 0x20C3
+#define GLX_VIDEO_OUT_ALPHA_NV 0x20C4
+#define GLX_VIDEO_OUT_DEPTH_NV 0x20C5
+#define GLX_VIDEO_OUT_COLOR_AND_ALPHA_NV 0x20C6
+#define GLX_VIDEO_OUT_COLOR_AND_DEPTH_NV 0x20C7
+#define GLX_VIDEO_OUT_FRAME_NV 0x20C8
+#define GLX_VIDEO_OUT_FIELD_1_NV 0x20C9
+#define GLX_VIDEO_OUT_FIELD_2_NV 0x20CA
+#define GLX_VIDEO_OUT_STACKED_FIELDS_1_2_NV 0x20CB
+#define GLX_VIDEO_OUT_STACKED_FIELDS_2_1_NV 0x20CC
+#endif
+
+#ifndef GLX_NV_swap_group
+#endif
+
+#ifndef GLX_NV_video_capture
+#define GLX_DEVICE_ID_NV 0x20CD
+#define GLX_UNIQUE_ID_NV 0x20CE
+#define GLX_NUM_VIDEO_CAPTURE_SLOTS_NV 0x20CF
+#endif
+
+#ifndef GLX_EXT_swap_control
+#define GLX_SWAP_INTERVAL_EXT 0x20F1
+#define GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
+#endif
+
+#ifndef GLX_NV_copy_image
+#endif
+
+#ifndef GLX_INTEL_swap_event
+#define GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK 0x04000000
+#define GLX_EXCHANGE_COMPLETE_INTEL 0x8180
+#define GLX_COPY_COMPLETE_INTEL 0x8181
+#define GLX_FLIP_COMPLETE_INTEL 0x8182
+#endif
+
+#ifndef GLX_NV_multisample_coverage
+#define GLX_COVERAGE_SAMPLES_NV 100001
+#define GLX_COLOR_SAMPLES_NV 0x20B3
+#endif
+
+#ifndef GLX_AMD_gpu_association
+#define GLX_GPU_VENDOR_AMD 0x1F00
+#define GLX_GPU_RENDERER_STRING_AMD 0x1F01
+#define GLX_GPU_OPENGL_VERSION_STRING_AMD 0x1F02
+#define GLX_GPU_FASTEST_TARGET_GPUS_AMD 0x21A2
+#define GLX_GPU_RAM_AMD 0x21A3
+#define GLX_GPU_CLOCK_AMD 0x21A4
+#define GLX_GPU_NUM_PIPES_AMD 0x21A5
+#define GLX_GPU_NUM_SIMD_AMD 0x21A6
+#define GLX_GPU_NUM_RB_AMD 0x21A7
+#define GLX_GPU_NUM_SPI_AMD 0x21A8
+#endif
+
+#ifndef GLX_EXT_create_context_es2_profile
+#define GLX_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
+#endif
+
+
+/*************************************************************/
+
+#ifndef GLX_ARB_get_proc_address
+typedef void (*__GLXextFuncPtr)(void);
+#endif
+
+#ifndef GLX_SGIX_video_source
+typedef XID GLXVideoSourceSGIX;
+#endif
+
+#ifndef GLX_SGIX_fbconfig
+typedef XID GLXFBConfigIDSGIX;
+typedef struct __GLXFBConfigRec *GLXFBConfigSGIX;
+#endif
+
+#ifndef GLX_SGIX_pbuffer
+typedef XID GLXPbufferSGIX;
+typedef struct {
+ int type;
+ unsigned long serial; /* # of last request processed by server */
+ Bool send_event; /* true if this came for SendEvent request */
+ Display *display; /* display the event was read from */
+ GLXDrawable drawable; /* i.d. of Drawable */
+ int event_type; /* GLX_DAMAGED_SGIX or GLX_SAVED_SGIX */
+ int draw_type; /* GLX_WINDOW_SGIX or GLX_PBUFFER_SGIX */
+ unsigned int mask; /* mask indicating which buffers are affected*/
+ int x, y;
+ int width, height;
+ int count; /* if nonzero, at least this many more */
+} GLXBufferClobberEventSGIX;
+#endif
+
+#ifndef GLX_NV_video_output
+typedef unsigned int GLXVideoDeviceNV;
+#endif
+
+#ifndef GLX_NV_video_capture
+typedef XID GLXVideoCaptureDeviceNV;
+#endif
+
+#ifndef GLEXT_64_TYPES_DEFINED
+/* This code block is duplicated in glext.h, so must be protected */
+#define GLEXT_64_TYPES_DEFINED
+/* Define int32_t, int64_t, and uint64_t types for UST/MSC */
+/* (as used in the GLX_OML_sync_control extension). */
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+#include <inttypes.h>
+#elif defined(__sun__) || defined(__digital__)
+#include <inttypes.h>
+#if defined(__STDC__)
+#if defined(__arch64__) || defined(_LP64)
+typedef long int int64_t;
+typedef unsigned long int uint64_t;
+#else
+typedef long long int int64_t;
+typedef unsigned long long int uint64_t;
+#endif /* __arch64__ */
+#endif /* __STDC__ */
+#elif defined( __VMS ) || defined(__sgi)
+#include <inttypes.h>
+#elif defined(__SCO__) || defined(__USLC__)
+#include <stdint.h>
+#elif defined(__UNIXOS2__) || defined(__SOL64__)
+typedef long int int32_t;
+typedef long long int int64_t;
+typedef unsigned long long int uint64_t;
+#elif defined(_WIN32) && defined(__GNUC__)
+#include <stdint.h>
+#elif defined(_WIN32)
+typedef __int32 int32_t;
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+#else
+#include <inttypes.h> /* Fallback option */
+#endif
+#endif
+
+#ifndef GLX_VERSION_1_3
+#define GLX_VERSION_1_3 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern GLXFBConfig * glXGetFBConfigs (Display *dpy, int screen, int *nelements);
+extern GLXFBConfig * glXChooseFBConfig (Display *dpy, int screen, const int *attrib_list, int *nelements);
+extern int glXGetFBConfigAttrib (Display *dpy, GLXFBConfig config, int attribute, int *value);
+extern XVisualInfo * glXGetVisualFromFBConfig (Display *dpy, GLXFBConfig config);
+extern GLXWindow glXCreateWindow (Display *dpy, GLXFBConfig config, Window win, const int *attrib_list);
+extern void glXDestroyWindow (Display *dpy, GLXWindow win);
+extern GLXPixmap glXCreatePixmap (Display *dpy, GLXFBConfig config, Pixmap pixmap, const int *attrib_list);
+extern void glXDestroyPixmap (Display *dpy, GLXPixmap pixmap);
+extern GLXPbuffer glXCreatePbuffer (Display *dpy, GLXFBConfig config, const int *attrib_list);
+extern void glXDestroyPbuffer (Display *dpy, GLXPbuffer pbuf);
+extern void glXQueryDrawable (Display *dpy, GLXDrawable draw, int attribute, unsigned int *value);
+extern GLXContext glXCreateNewContext (Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct);
+extern Bool glXMakeContextCurrent (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
+extern GLXDrawable glXGetCurrentReadDrawable (void);
+extern Display * glXGetCurrentDisplay (void);
+extern int glXQueryContext (Display *dpy, GLXContext ctx, int attribute, int *value);
+extern void glXSelectEvent (Display *dpy, GLXDrawable draw, unsigned long event_mask);
+extern void glXGetSelectedEvent (Display *dpy, GLXDrawable draw, unsigned long *event_mask);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef GLXFBConfig * ( * PFNGLXGETFBCONFIGSPROC) (Display *dpy, int screen, int *nelements);
+typedef GLXFBConfig * ( * PFNGLXCHOOSEFBCONFIGPROC) (Display *dpy, int screen, const int *attrib_list, int *nelements);
+typedef int ( * PFNGLXGETFBCONFIGATTRIBPROC) (Display *dpy, GLXFBConfig config, int attribute, int *value);
+typedef XVisualInfo * ( * PFNGLXGETVISUALFROMFBCONFIGPROC) (Display *dpy, GLXFBConfig config);
+typedef GLXWindow ( * PFNGLXCREATEWINDOWPROC) (Display *dpy, GLXFBConfig config, Window win, const int *attrib_list);
+typedef void ( * PFNGLXDESTROYWINDOWPROC) (Display *dpy, GLXWindow win);
+typedef GLXPixmap ( * PFNGLXCREATEPIXMAPPROC) (Display *dpy, GLXFBConfig config, Pixmap pixmap, const int *attrib_list);
+typedef void ( * PFNGLXDESTROYPIXMAPPROC) (Display *dpy, GLXPixmap pixmap);
+typedef GLXPbuffer ( * PFNGLXCREATEPBUFFERPROC) (Display *dpy, GLXFBConfig config, const int *attrib_list);
+typedef void ( * PFNGLXDESTROYPBUFFERPROC) (Display *dpy, GLXPbuffer pbuf);
+typedef void ( * PFNGLXQUERYDRAWABLEPROC) (Display *dpy, GLXDrawable draw, int attribute, unsigned int *value);
+typedef GLXContext ( * PFNGLXCREATENEWCONTEXTPROC) (Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct);
+typedef Bool ( * PFNGLXMAKECONTEXTCURRENTPROC) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
+typedef GLXDrawable ( * PFNGLXGETCURRENTREADDRAWABLEPROC) (void);
+typedef Display * ( * PFNGLXGETCURRENTDISPLAYPROC) (void);
+typedef int ( * PFNGLXQUERYCONTEXTPROC) (Display *dpy, GLXContext ctx, int attribute, int *value);
+typedef void ( * PFNGLXSELECTEVENTPROC) (Display *dpy, GLXDrawable draw, unsigned long event_mask);
+typedef void ( * PFNGLXGETSELECTEDEVENTPROC) (Display *dpy, GLXDrawable draw, unsigned long *event_mask);
+#endif
+
+#ifndef GLX_VERSION_1_4
+#define GLX_VERSION_1_4 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern __GLXextFuncPtr glXGetProcAddress (const GLubyte *procName);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef __GLXextFuncPtr ( * PFNGLXGETPROCADDRESSPROC) (const GLubyte *procName);
+#endif
+
+#ifndef GLX_ARB_get_proc_address
+#define GLX_ARB_get_proc_address 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern __GLXextFuncPtr glXGetProcAddressARB (const GLubyte *procName);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef __GLXextFuncPtr ( * PFNGLXGETPROCADDRESSARBPROC) (const GLubyte *procName);
+#endif
+
+#ifndef GLX_ARB_multisample
+#define GLX_ARB_multisample 1
+#endif
+
+#ifndef GLX_ARB_fbconfig_float
+#define GLX_ARB_fbconfig_float 1
+#endif
+
+#ifndef GLX_ARB_framebuffer_sRGB
+#define GLX_ARB_framebuffer_sRGB 1
+#endif
+
+#ifndef GLX_ARB_create_context
+#define GLX_ARB_create_context 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern GLXContext glXCreateContextAttribsARB (Display *dpy, GLXFBConfig config, GLXContext share_context, Bool direct, const int *attrib_list);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef GLXContext ( * PFNGLXCREATECONTEXTATTRIBSARBPROC) (Display *dpy, GLXFBConfig config, GLXContext share_context, Bool direct, const int *attrib_list);
+#endif
+
+#ifndef GLX_ARB_create_context_profile
+#define GLX_ARB_create_context_profile 1
+#endif
+
+#ifndef GLX_ARB_create_context_robustness
+#define GLX_ARB_create_context_robustness 1
+#endif
+
+#ifndef GLX_SGIS_multisample
+#define GLX_SGIS_multisample 1
+#endif
+
+#ifndef GLX_EXT_visual_info
+#define GLX_EXT_visual_info 1
+#endif
+
+#ifndef GLX_SGI_swap_control
+#define GLX_SGI_swap_control 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern int glXSwapIntervalSGI (int interval);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef int ( * PFNGLXSWAPINTERVALSGIPROC) (int interval);
+#endif
+
+#ifndef GLX_SGI_video_sync
+#define GLX_SGI_video_sync 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern int glXGetVideoSyncSGI (unsigned int *count);
+extern int glXWaitVideoSyncSGI (int divisor, int remainder, unsigned int *count);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef int ( * PFNGLXGETVIDEOSYNCSGIPROC) (unsigned int *count);
+typedef int ( * PFNGLXWAITVIDEOSYNCSGIPROC) (int divisor, int remainder, unsigned int *count);
+#endif
+
+#ifndef GLX_SGI_make_current_read
+#define GLX_SGI_make_current_read 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern Bool glXMakeCurrentReadSGI (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
+extern GLXDrawable glXGetCurrentReadDrawableSGI (void);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef Bool ( * PFNGLXMAKECURRENTREADSGIPROC) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
+typedef GLXDrawable ( * PFNGLXGETCURRENTREADDRAWABLESGIPROC) (void);
+#endif
+
+#ifndef GLX_SGIX_video_source
+#define GLX_SGIX_video_source 1
+#ifdef _VL_H
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern GLXVideoSourceSGIX glXCreateGLXVideoSourceSGIX (Display *display, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode);
+extern void glXDestroyGLXVideoSourceSGIX (Display *dpy, GLXVideoSourceSGIX glxvideosource);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef GLXVideoSourceSGIX ( * PFNGLXCREATEGLXVIDEOSOURCESGIXPROC) (Display *display, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode);
+typedef void ( * PFNGLXDESTROYGLXVIDEOSOURCESGIXPROC) (Display *dpy, GLXVideoSourceSGIX glxvideosource);
+#endif /* _VL_H */
+#endif
+
+#ifndef GLX_EXT_visual_rating
+#define GLX_EXT_visual_rating 1
+#endif
+
+#ifndef GLX_EXT_import_context
+#define GLX_EXT_import_context 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern Display * glXGetCurrentDisplayEXT (void);
+extern int glXQueryContextInfoEXT (Display *dpy, GLXContext context, int attribute, int *value);
+extern GLXContextID glXGetContextIDEXT (const GLXContext context);
+extern GLXContext glXImportContextEXT (Display *dpy, GLXContextID contextID);
+extern void glXFreeContextEXT (Display *dpy, GLXContext context);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef Display * ( * PFNGLXGETCURRENTDISPLAYEXTPROC) (void);
+typedef int ( * PFNGLXQUERYCONTEXTINFOEXTPROC) (Display *dpy, GLXContext context, int attribute, int *value);
+typedef GLXContextID ( * PFNGLXGETCONTEXTIDEXTPROC) (const GLXContext context);
+typedef GLXContext ( * PFNGLXIMPORTCONTEXTEXTPROC) (Display *dpy, GLXContextID contextID);
+typedef void ( * PFNGLXFREECONTEXTEXTPROC) (Display *dpy, GLXContext context);
+#endif
+
+#ifndef GLX_SGIX_fbconfig
+#define GLX_SGIX_fbconfig 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern int glXGetFBConfigAttribSGIX (Display *dpy, GLXFBConfigSGIX config, int attribute, int *value);
+extern GLXFBConfigSGIX * glXChooseFBConfigSGIX (Display *dpy, int screen, int *attrib_list, int *nelements);
+extern GLXPixmap glXCreateGLXPixmapWithConfigSGIX (Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap);
+extern GLXContext glXCreateContextWithConfigSGIX (Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct);
+extern XVisualInfo * glXGetVisualFromFBConfigSGIX (Display *dpy, GLXFBConfigSGIX config);
+extern GLXFBConfigSGIX glXGetFBConfigFromVisualSGIX (Display *dpy, XVisualInfo *vis);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef int ( * PFNGLXGETFBCONFIGATTRIBSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, int attribute, int *value);
+typedef GLXFBConfigSGIX * ( * PFNGLXCHOOSEFBCONFIGSGIXPROC) (Display *dpy, int screen, int *attrib_list, int *nelements);
+typedef GLXPixmap ( * PFNGLXCREATEGLXPIXMAPWITHCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap);
+typedef GLXContext ( * PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct);
+typedef XVisualInfo * ( * PFNGLXGETVISUALFROMFBCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config);
+typedef GLXFBConfigSGIX ( * PFNGLXGETFBCONFIGFROMVISUALSGIXPROC) (Display *dpy, XVisualInfo *vis);
+#endif
+
+#ifndef GLX_SGIX_pbuffer
+#define GLX_SGIX_pbuffer 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern GLXPbufferSGIX glXCreateGLXPbufferSGIX (Display *dpy, GLXFBConfigSGIX config, unsigned int width, unsigned int height, int *attrib_list);
+extern void glXDestroyGLXPbufferSGIX (Display *dpy, GLXPbufferSGIX pbuf);
+extern int glXQueryGLXPbufferSGIX (Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value);
+extern void glXSelectEventSGIX (Display *dpy, GLXDrawable drawable, unsigned long mask);
+extern void glXGetSelectedEventSGIX (Display *dpy, GLXDrawable drawable, unsigned long *mask);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef GLXPbufferSGIX ( * PFNGLXCREATEGLXPBUFFERSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, unsigned int width, unsigned int height, int *attrib_list);
+typedef void ( * PFNGLXDESTROYGLXPBUFFERSGIXPROC) (Display *dpy, GLXPbufferSGIX pbuf);
+typedef int ( * PFNGLXQUERYGLXPBUFFERSGIXPROC) (Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value);
+typedef void ( * PFNGLXSELECTEVENTSGIXPROC) (Display *dpy, GLXDrawable drawable, unsigned long mask);
+typedef void ( * PFNGLXGETSELECTEDEVENTSGIXPROC) (Display *dpy, GLXDrawable drawable, unsigned long *mask);
+#endif
+
+#ifndef GLX_SGI_cushion
+#define GLX_SGI_cushion 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern void glXCushionSGI (Display *dpy, Window window, float cushion);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef void ( * PFNGLXCUSHIONSGIPROC) (Display *dpy, Window window, float cushion);
+#endif
+
+#ifndef GLX_SGIX_video_resize
+#define GLX_SGIX_video_resize 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern int glXBindChannelToWindowSGIX (Display *display, int screen, int channel, Window window);
+extern int glXChannelRectSGIX (Display *display, int screen, int channel, int x, int y, int w, int h);
+extern int glXQueryChannelRectSGIX (Display *display, int screen, int channel, int *dx, int *dy, int *dw, int *dh);
+extern int glXQueryChannelDeltasSGIX (Display *display, int screen, int channel, int *x, int *y, int *w, int *h);
+extern int glXChannelRectSyncSGIX (Display *display, int screen, int channel, GLenum synctype);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef int ( * PFNGLXBINDCHANNELTOWINDOWSGIXPROC) (Display *display, int screen, int channel, Window window);
+typedef int ( * PFNGLXCHANNELRECTSGIXPROC) (Display *display, int screen, int channel, int x, int y, int w, int h);
+typedef int ( * PFNGLXQUERYCHANNELRECTSGIXPROC) (Display *display, int screen, int channel, int *dx, int *dy, int *dw, int *dh);
+typedef int ( * PFNGLXQUERYCHANNELDELTASSGIXPROC) (Display *display, int screen, int channel, int *x, int *y, int *w, int *h);
+typedef int ( * PFNGLXCHANNELRECTSYNCSGIXPROC) (Display *display, int screen, int channel, GLenum synctype);
+#endif
+
+#ifndef GLX_SGIX_dmbuffer
+#define GLX_SGIX_dmbuffer 1
+#ifdef _DM_BUFFER_H_
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern Bool glXAssociateDMPbufferSGIX (Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef Bool ( * PFNGLXASSOCIATEDMPBUFFERSGIXPROC) (Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer);
+#endif /* _DM_BUFFER_H_ */
+#endif
+
+#ifndef GLX_SGIX_swap_group
+#define GLX_SGIX_swap_group 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern void glXJoinSwapGroupSGIX (Display *dpy, GLXDrawable drawable, GLXDrawable member);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef void ( * PFNGLXJOINSWAPGROUPSGIXPROC) (Display *dpy, GLXDrawable drawable, GLXDrawable member);
+#endif
+
+#ifndef GLX_SGIX_swap_barrier
+#define GLX_SGIX_swap_barrier 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern void glXBindSwapBarrierSGIX (Display *dpy, GLXDrawable drawable, int barrier);
+extern Bool glXQueryMaxSwapBarriersSGIX (Display *dpy, int screen, int *max);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef void ( * PFNGLXBINDSWAPBARRIERSGIXPROC) (Display *dpy, GLXDrawable drawable, int barrier);
+typedef Bool ( * PFNGLXQUERYMAXSWAPBARRIERSSGIXPROC) (Display *dpy, int screen, int *max);
+#endif
+
+#ifndef GLX_SUN_get_transparent_index
+#define GLX_SUN_get_transparent_index 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern Status glXGetTransparentIndexSUN (Display *dpy, Window overlay, Window underlay, long *pTransparentIndex);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef Status ( * PFNGLXGETTRANSPARENTINDEXSUNPROC) (Display *dpy, Window overlay, Window underlay, long *pTransparentIndex);
+#endif
+
+#ifndef GLX_MESA_copy_sub_buffer
+#define GLX_MESA_copy_sub_buffer 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern void glXCopySubBufferMESA (Display *dpy, GLXDrawable drawable, int x, int y, int width, int height);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef void ( * PFNGLXCOPYSUBBUFFERMESAPROC) (Display *dpy, GLXDrawable drawable, int x, int y, int width, int height);
+#endif
+
+#ifndef GLX_MESA_pixmap_colormap
+#define GLX_MESA_pixmap_colormap 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern GLXPixmap glXCreateGLXPixmapMESA (Display *dpy, XVisualInfo *visual, Pixmap pixmap, Colormap cmap);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef GLXPixmap ( * PFNGLXCREATEGLXPIXMAPMESAPROC) (Display *dpy, XVisualInfo *visual, Pixmap pixmap, Colormap cmap);
+#endif
+
+#ifndef GLX_MESA_release_buffers
+#define GLX_MESA_release_buffers 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern Bool glXReleaseBuffersMESA (Display *dpy, GLXDrawable drawable);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef Bool ( * PFNGLXRELEASEBUFFERSMESAPROC) (Display *dpy, GLXDrawable drawable);
+#endif
+
+#ifndef GLX_MESA_set_3dfx_mode
+#define GLX_MESA_set_3dfx_mode 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern Bool glXSet3DfxModeMESA (int mode);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef Bool ( * PFNGLXSET3DFXMODEMESAPROC) (int mode);
+#endif
+
+#ifndef GLX_SGIX_visual_select_group
+#define GLX_SGIX_visual_select_group 1
+#endif
+
+#ifndef GLX_OML_swap_method
+#define GLX_OML_swap_method 1
+#endif
+
+#ifndef GLX_OML_sync_control
+#define GLX_OML_sync_control 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern Bool glXGetSyncValuesOML (Display *dpy, GLXDrawable drawable, int64_t *ust, int64_t *msc, int64_t *sbc);
+extern Bool glXGetMscRateOML (Display *dpy, GLXDrawable drawable, int32_t *numerator, int32_t *denominator);
+extern int64_t glXSwapBuffersMscOML (Display *dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder);
+extern Bool glXWaitForMscOML (Display *dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc);
+extern Bool glXWaitForSbcOML (Display *dpy, GLXDrawable drawable, int64_t target_sbc, int64_t *ust, int64_t *msc, int64_t *sbc);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef Bool ( * PFNGLXGETSYNCVALUESOMLPROC) (Display *dpy, GLXDrawable drawable, int64_t *ust, int64_t *msc, int64_t *sbc);
+typedef Bool ( * PFNGLXGETMSCRATEOMLPROC) (Display *dpy, GLXDrawable drawable, int32_t *numerator, int32_t *denominator);
+typedef int64_t ( * PFNGLXSWAPBUFFERSMSCOMLPROC) (Display *dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder);
+typedef Bool ( * PFNGLXWAITFORMSCOMLPROC) (Display *dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc);
+typedef Bool ( * PFNGLXWAITFORSBCOMLPROC) (Display *dpy, GLXDrawable drawable, int64_t target_sbc, int64_t *ust, int64_t *msc, int64_t *sbc);
+#endif
+
+#ifndef GLX_NV_float_buffer
+#define GLX_NV_float_buffer 1
+#endif
+
+#ifndef GLX_SGIX_hyperpipe
+#define GLX_SGIX_hyperpipe 1
+
+typedef struct {
+ char pipeName[GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX];
+ int networkId;
+} GLXHyperpipeNetworkSGIX;
+
+typedef struct {
+ char pipeName[GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX];
+ int channel;
+ unsigned int
+ participationType;
+ int timeSlice;
+} GLXHyperpipeConfigSGIX;
+
+typedef struct {
+ char pipeName[GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX];
+ int srcXOrigin, srcYOrigin, srcWidth, srcHeight;
+ int destXOrigin, destYOrigin, destWidth, destHeight;
+} GLXPipeRect;
+
+typedef struct {
+ char pipeName[GLX_HYPERPIPE_PIPE_NAME_LENGTH_SGIX];
+ int XOrigin, YOrigin, maxHeight, maxWidth;
+} GLXPipeRectLimits;
+
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern GLXHyperpipeNetworkSGIX * glXQueryHyperpipeNetworkSGIX (Display *dpy, int *npipes);
+extern int glXHyperpipeConfigSGIX (Display *dpy, int networkId, int npipes, GLXHyperpipeConfigSGIX *cfg, int *hpId);
+extern GLXHyperpipeConfigSGIX * glXQueryHyperpipeConfigSGIX (Display *dpy, int hpId, int *npipes);
+extern int glXDestroyHyperpipeConfigSGIX (Display *dpy, int hpId);
+extern int glXBindHyperpipeSGIX (Display *dpy, int hpId);
+extern int glXQueryHyperpipeBestAttribSGIX (Display *dpy, int timeSlice, int attrib, int size, void *attribList, void *returnAttribList);
+extern int glXHyperpipeAttribSGIX (Display *dpy, int timeSlice, int attrib, int size, void *attribList);
+extern int glXQueryHyperpipeAttribSGIX (Display *dpy, int timeSlice, int attrib, int size, void *returnAttribList);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef GLXHyperpipeNetworkSGIX * ( * PFNGLXQUERYHYPERPIPENETWORKSGIXPROC) (Display *dpy, int *npipes);
+typedef int ( * PFNGLXHYPERPIPECONFIGSGIXPROC) (Display *dpy, int networkId, int npipes, GLXHyperpipeConfigSGIX *cfg, int *hpId);
+typedef GLXHyperpipeConfigSGIX * ( * PFNGLXQUERYHYPERPIPECONFIGSGIXPROC) (Display *dpy, int hpId, int *npipes);
+typedef int ( * PFNGLXDESTROYHYPERPIPECONFIGSGIXPROC) (Display *dpy, int hpId);
+typedef int ( * PFNGLXBINDHYPERPIPESGIXPROC) (Display *dpy, int hpId);
+typedef int ( * PFNGLXQUERYHYPERPIPEBESTATTRIBSGIXPROC) (Display *dpy, int timeSlice, int attrib, int size, void *attribList, void *returnAttribList);
+typedef int ( * PFNGLXHYPERPIPEATTRIBSGIXPROC) (Display *dpy, int timeSlice, int attrib, int size, void *attribList);
+typedef int ( * PFNGLXQUERYHYPERPIPEATTRIBSGIXPROC) (Display *dpy, int timeSlice, int attrib, int size, void *returnAttribList);
+#endif
+
+#ifndef GLX_MESA_agp_offset
+#define GLX_MESA_agp_offset 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern unsigned int glXGetAGPOffsetMESA (const void *pointer);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef unsigned int ( * PFNGLXGETAGPOFFSETMESAPROC) (const void *pointer);
+#endif
+
+#ifndef GLX_EXT_fbconfig_packed_float
+#define GLX_EXT_fbconfig_packed_float 1
+#endif
+
+#ifndef GLX_EXT_framebuffer_sRGB
+#define GLX_EXT_framebuffer_sRGB 1
+#endif
+
+#ifndef GLX_EXT_texture_from_pixmap
+#define GLX_EXT_texture_from_pixmap 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern void glXBindTexImageEXT (Display *dpy, GLXDrawable drawable, int buffer, const int *attrib_list);
+extern void glXReleaseTexImageEXT (Display *dpy, GLXDrawable drawable, int buffer);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef void ( * PFNGLXBINDTEXIMAGEEXTPROC) (Display *dpy, GLXDrawable drawable, int buffer, const int *attrib_list);
+typedef void ( * PFNGLXRELEASETEXIMAGEEXTPROC) (Display *dpy, GLXDrawable drawable, int buffer);
+#endif
+
+#ifndef GLX_NV_present_video
+#define GLX_NV_present_video 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern unsigned int * glXEnumerateVideoDevicesNV (Display *dpy, int screen, int *nelements);
+extern int glXBindVideoDeviceNV (Display *dpy, unsigned int video_slot, unsigned int video_device, const int *attrib_list);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef unsigned int * ( * PFNGLXENUMERATEVIDEODEVICESNVPROC) (Display *dpy, int screen, int *nelements);
+typedef int ( * PFNGLXBINDVIDEODEVICENVPROC) (Display *dpy, unsigned int video_slot, unsigned int video_device, const int *attrib_list);
+#endif
+
+#ifndef GLX_NV_video_output
+#define GLX_NV_video_output 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern int glXGetVideoDeviceNV (Display *dpy, int screen, int numVideoDevices, GLXVideoDeviceNV *pVideoDevice);
+extern int glXReleaseVideoDeviceNV (Display *dpy, int screen, GLXVideoDeviceNV VideoDevice);
+extern int glXBindVideoImageNV (Display *dpy, GLXVideoDeviceNV VideoDevice, GLXPbuffer pbuf, int iVideoBuffer);
+extern int glXReleaseVideoImageNV (Display *dpy, GLXPbuffer pbuf);
+extern int glXSendPbufferToVideoNV (Display *dpy, GLXPbuffer pbuf, int iBufferType, unsigned long *pulCounterPbuffer, GLboolean bBlock);
+extern int glXGetVideoInfoNV (Display *dpy, int screen, GLXVideoDeviceNV VideoDevice, unsigned long *pulCounterOutputPbuffer, unsigned long *pulCounterOutputVideo);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef int ( * PFNGLXGETVIDEODEVICENVPROC) (Display *dpy, int screen, int numVideoDevices, GLXVideoDeviceNV *pVideoDevice);
+typedef int ( * PFNGLXRELEASEVIDEODEVICENVPROC) (Display *dpy, int screen, GLXVideoDeviceNV VideoDevice);
+typedef int ( * PFNGLXBINDVIDEOIMAGENVPROC) (Display *dpy, GLXVideoDeviceNV VideoDevice, GLXPbuffer pbuf, int iVideoBuffer);
+typedef int ( * PFNGLXRELEASEVIDEOIMAGENVPROC) (Display *dpy, GLXPbuffer pbuf);
+typedef int ( * PFNGLXSENDPBUFFERTOVIDEONVPROC) (Display *dpy, GLXPbuffer pbuf, int iBufferType, unsigned long *pulCounterPbuffer, GLboolean bBlock);
+typedef int ( * PFNGLXGETVIDEOINFONVPROC) (Display *dpy, int screen, GLXVideoDeviceNV VideoDevice, unsigned long *pulCounterOutputPbuffer, unsigned long *pulCounterOutputVideo);
+#endif
+
+#ifndef GLX_NV_swap_group
+#define GLX_NV_swap_group 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern Bool glXJoinSwapGroupNV (Display *dpy, GLXDrawable drawable, GLuint group);
+extern Bool glXBindSwapBarrierNV (Display *dpy, GLuint group, GLuint barrier);
+extern Bool glXQuerySwapGroupNV (Display *dpy, GLXDrawable drawable, GLuint *group, GLuint *barrier);
+extern Bool glXQueryMaxSwapGroupsNV (Display *dpy, int screen, GLuint *maxGroups, GLuint *maxBarriers);
+extern Bool glXQueryFrameCountNV (Display *dpy, int screen, GLuint *count);
+extern Bool glXResetFrameCountNV (Display *dpy, int screen);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef Bool ( * PFNGLXJOINSWAPGROUPNVPROC) (Display *dpy, GLXDrawable drawable, GLuint group);
+typedef Bool ( * PFNGLXBINDSWAPBARRIERNVPROC) (Display *dpy, GLuint group, GLuint barrier);
+typedef Bool ( * PFNGLXQUERYSWAPGROUPNVPROC) (Display *dpy, GLXDrawable drawable, GLuint *group, GLuint *barrier);
+typedef Bool ( * PFNGLXQUERYMAXSWAPGROUPSNVPROC) (Display *dpy, int screen, GLuint *maxGroups, GLuint *maxBarriers);
+typedef Bool ( * PFNGLXQUERYFRAMECOUNTNVPROC) (Display *dpy, int screen, GLuint *count);
+typedef Bool ( * PFNGLXRESETFRAMECOUNTNVPROC) (Display *dpy, int screen);
+#endif
+
+#ifndef GLX_NV_video_capture
+#define GLX_NV_video_capture 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern int glXBindVideoCaptureDeviceNV (Display *dpy, unsigned int video_capture_slot, GLXVideoCaptureDeviceNV device);
+extern GLXVideoCaptureDeviceNV * glXEnumerateVideoCaptureDevicesNV (Display *dpy, int screen, int *nelements);
+extern void glXLockVideoCaptureDeviceNV (Display *dpy, GLXVideoCaptureDeviceNV device);
+extern int glXQueryVideoCaptureDeviceNV (Display *dpy, GLXVideoCaptureDeviceNV device, int attribute, int *value);
+extern void glXReleaseVideoCaptureDeviceNV (Display *dpy, GLXVideoCaptureDeviceNV device);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef int ( * PFNGLXBINDVIDEOCAPTUREDEVICENVPROC) (Display *dpy, unsigned int video_capture_slot, GLXVideoCaptureDeviceNV device);
+typedef GLXVideoCaptureDeviceNV * ( * PFNGLXENUMERATEVIDEOCAPTUREDEVICESNVPROC) (Display *dpy, int screen, int *nelements);
+typedef void ( * PFNGLXLOCKVIDEOCAPTUREDEVICENVPROC) (Display *dpy, GLXVideoCaptureDeviceNV device);
+typedef int ( * PFNGLXQUERYVIDEOCAPTUREDEVICENVPROC) (Display *dpy, GLXVideoCaptureDeviceNV device, int attribute, int *value);
+typedef void ( * PFNGLXRELEASEVIDEOCAPTUREDEVICENVPROC) (Display *dpy, GLXVideoCaptureDeviceNV device);
+#endif
+
+#ifndef GLX_EXT_swap_control
+#define GLX_EXT_swap_control 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern int glXSwapIntervalEXT (Display *dpy, GLXDrawable drawable, int interval);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef int ( * PFNGLXSWAPINTERVALEXTPROC) (Display *dpy, GLXDrawable drawable, int interval);
+#endif
+
+#ifndef GLX_NV_copy_image
+#define GLX_NV_copy_image 1
+#ifdef GLX_GLXEXT_PROTOTYPES
+extern void glXCopyImageSubDataNV (Display *dpy, GLXContext srcCtx, GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLXContext dstCtx, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
+#endif /* GLX_GLXEXT_PROTOTYPES */
+typedef void ( * PFNGLXCOPYIMAGESUBDATANVPROC) (Display *dpy, GLXContext srcCtx, GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLXContext dstCtx, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
+#endif
+
+#ifndef GLX_INTEL_swap_event
+#define GLX_INTEL_swap_event 1
+#endif
+
+#ifndef GLX_NV_multisample_coverage
+#define GLX_NV_multisample_coverage 1
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+#ifndef __wglext_h_
+#define __wglext_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+** Copyright (c) 2007-2010 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Function declaration macros - to move into glplatform.h */
+
+#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
+#define WIN32_LEAN_AND_MEAN 1
+#include <windows.h>
+#endif
+
+#ifndef APIENTRY
+#define APIENTRY
+#endif
+#ifndef APIENTRYP
+#define APIENTRYP APIENTRY *
+#endif
+#ifndef GLAPI
+#define GLAPI extern
+#endif
+
+/*************************************************************/
+
+/* Header file version number */
+/* wglext.h last updated 2010/08/06 */
+/* Current version at http://www.opengl.org/registry/ */
+#define WGL_WGLEXT_VERSION 22
+
+#ifndef WGL_ARB_buffer_region
+#define WGL_FRONT_COLOR_BUFFER_BIT_ARB 0x00000001
+#define WGL_BACK_COLOR_BUFFER_BIT_ARB 0x00000002
+#define WGL_DEPTH_BUFFER_BIT_ARB 0x00000004
+#define WGL_STENCIL_BUFFER_BIT_ARB 0x00000008
+#endif
+
+#ifndef WGL_ARB_multisample
+#define WGL_SAMPLE_BUFFERS_ARB 0x2041
+#define WGL_SAMPLES_ARB 0x2042
+#endif
+
+#ifndef WGL_ARB_extensions_string
+#endif
+
+#ifndef WGL_ARB_pixel_format
+#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
+#define WGL_DRAW_TO_WINDOW_ARB 0x2001
+#define WGL_DRAW_TO_BITMAP_ARB 0x2002
+#define WGL_ACCELERATION_ARB 0x2003
+#define WGL_NEED_PALETTE_ARB 0x2004
+#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
+#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
+#define WGL_SWAP_METHOD_ARB 0x2007
+#define WGL_NUMBER_OVERLAYS_ARB 0x2008
+#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
+#define WGL_TRANSPARENT_ARB 0x200A
+#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
+#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
+#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
+#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
+#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
+#define WGL_SHARE_DEPTH_ARB 0x200C
+#define WGL_SHARE_STENCIL_ARB 0x200D
+#define WGL_SHARE_ACCUM_ARB 0x200E
+#define WGL_SUPPORT_GDI_ARB 0x200F
+#define WGL_SUPPORT_OPENGL_ARB 0x2010
+#define WGL_DOUBLE_BUFFER_ARB 0x2011
+#define WGL_STEREO_ARB 0x2012
+#define WGL_PIXEL_TYPE_ARB 0x2013
+#define WGL_COLOR_BITS_ARB 0x2014
+#define WGL_RED_BITS_ARB 0x2015
+#define WGL_RED_SHIFT_ARB 0x2016
+#define WGL_GREEN_BITS_ARB 0x2017
+#define WGL_GREEN_SHIFT_ARB 0x2018
+#define WGL_BLUE_BITS_ARB 0x2019
+#define WGL_BLUE_SHIFT_ARB 0x201A
+#define WGL_ALPHA_BITS_ARB 0x201B
+#define WGL_ALPHA_SHIFT_ARB 0x201C
+#define WGL_ACCUM_BITS_ARB 0x201D
+#define WGL_ACCUM_RED_BITS_ARB 0x201E
+#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
+#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
+#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
+#define WGL_DEPTH_BITS_ARB 0x2022
+#define WGL_STENCIL_BITS_ARB 0x2023
+#define WGL_AUX_BUFFERS_ARB 0x2024
+#define WGL_NO_ACCELERATION_ARB 0x2025
+#define WGL_GENERIC_ACCELERATION_ARB 0x2026
+#define WGL_FULL_ACCELERATION_ARB 0x2027
+#define WGL_SWAP_EXCHANGE_ARB 0x2028
+#define WGL_SWAP_COPY_ARB 0x2029
+#define WGL_SWAP_UNDEFINED_ARB 0x202A
+#define WGL_TYPE_RGBA_ARB 0x202B
+#define WGL_TYPE_COLORINDEX_ARB 0x202C
+#endif
+
+#ifndef WGL_ARB_make_current_read
+#define ERROR_INVALID_PIXEL_TYPE_ARB 0x2043
+#define ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB 0x2054
+#endif
+
+#ifndef WGL_ARB_pbuffer
+#define WGL_DRAW_TO_PBUFFER_ARB 0x202D
+#define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E
+#define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F
+#define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030
+#define WGL_PBUFFER_LARGEST_ARB 0x2033
+#define WGL_PBUFFER_WIDTH_ARB 0x2034
+#define WGL_PBUFFER_HEIGHT_ARB 0x2035
+#define WGL_PBUFFER_LOST_ARB 0x2036
+#endif
+
+#ifndef WGL_ARB_render_texture
+#define WGL_BIND_TO_TEXTURE_RGB_ARB 0x2070
+#define WGL_BIND_TO_TEXTURE_RGBA_ARB 0x2071
+#define WGL_TEXTURE_FORMAT_ARB 0x2072
+#define WGL_TEXTURE_TARGET_ARB 0x2073
+#define WGL_MIPMAP_TEXTURE_ARB 0x2074
+#define WGL_TEXTURE_RGB_ARB 0x2075
+#define WGL_TEXTURE_RGBA_ARB 0x2076
+#define WGL_NO_TEXTURE_ARB 0x2077
+#define WGL_TEXTURE_CUBE_MAP_ARB 0x2078
+#define WGL_TEXTURE_1D_ARB 0x2079
+#define WGL_TEXTURE_2D_ARB 0x207A
+#define WGL_MIPMAP_LEVEL_ARB 0x207B
+#define WGL_CUBE_MAP_FACE_ARB 0x207C
+#define WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x207D
+#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x207E
+#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x207F
+#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x2080
+#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x2081
+#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x2082
+#define WGL_FRONT_LEFT_ARB 0x2083
+#define WGL_FRONT_RIGHT_ARB 0x2084
+#define WGL_BACK_LEFT_ARB 0x2085
+#define WGL_BACK_RIGHT_ARB 0x2086
+#define WGL_AUX0_ARB 0x2087
+#define WGL_AUX1_ARB 0x2088
+#define WGL_AUX2_ARB 0x2089
+#define WGL_AUX3_ARB 0x208A
+#define WGL_AUX4_ARB 0x208B
+#define WGL_AUX5_ARB 0x208C
+#define WGL_AUX6_ARB 0x208D
+#define WGL_AUX7_ARB 0x208E
+#define WGL_AUX8_ARB 0x208F
+#define WGL_AUX9_ARB 0x2090
+#endif
+
+#ifndef WGL_ARB_pixel_format_float
+#define WGL_TYPE_RGBA_FLOAT_ARB 0x21A0
+#endif
+
+#ifndef WGL_ARB_framebuffer_sRGB
+#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20A9
+#endif
+
+#ifndef WGL_ARB_create_context
+#define WGL_CONTEXT_DEBUG_BIT_ARB 0x00000001
+#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
+#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
+#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
+#define WGL_CONTEXT_FLAGS_ARB 0x2094
+#define ERROR_INVALID_VERSION_ARB 0x2095
+#endif
+
+#ifndef WGL_ARB_create_context_profile
+#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
+#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
+#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
+#define ERROR_INVALID_PROFILE_ARB 0x2096
+#endif
+
+#ifndef WGL_ARB_create_context_robustness
+#define WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB 0x00000004
+#define WGL_LOSE_CONTEXT_ON_RESET_ARB 0x8252
+#define WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
+#define WGL_NO_RESET_NOTIFICATION_ARB 0x8261
+#endif
+
+#ifndef WGL_EXT_make_current_read
+#define ERROR_INVALID_PIXEL_TYPE_EXT 0x2043
+#endif
+
+#ifndef WGL_EXT_pixel_format
+#define WGL_NUMBER_PIXEL_FORMATS_EXT 0x2000
+#define WGL_DRAW_TO_WINDOW_EXT 0x2001
+#define WGL_DRAW_TO_BITMAP_EXT 0x2002
+#define WGL_ACCELERATION_EXT 0x2003
+#define WGL_NEED_PALETTE_EXT 0x2004
+#define WGL_NEED_SYSTEM_PALETTE_EXT 0x2005
+#define WGL_SWAP_LAYER_BUFFERS_EXT 0x2006
+#define WGL_SWAP_METHOD_EXT 0x2007
+#define WGL_NUMBER_OVERLAYS_EXT 0x2008
+#define WGL_NUMBER_UNDERLAYS_EXT 0x2009
+#define WGL_TRANSPARENT_EXT 0x200A
+#define WGL_TRANSPARENT_VALUE_EXT 0x200B
+#define WGL_SHARE_DEPTH_EXT 0x200C
+#define WGL_SHARE_STENCIL_EXT 0x200D
+#define WGL_SHARE_ACCUM_EXT 0x200E
+#define WGL_SUPPORT_GDI_EXT 0x200F
+#define WGL_SUPPORT_OPENGL_EXT 0x2010
+#define WGL_DOUBLE_BUFFER_EXT 0x2011
+#define WGL_STEREO_EXT 0x2012
+#define WGL_PIXEL_TYPE_EXT 0x2013
+#define WGL_COLOR_BITS_EXT 0x2014
+#define WGL_RED_BITS_EXT 0x2015
+#define WGL_RED_SHIFT_EXT 0x2016
+#define WGL_GREEN_BITS_EXT 0x2017
+#define WGL_GREEN_SHIFT_EXT 0x2018
+#define WGL_BLUE_BITS_EXT 0x2019
+#define WGL_BLUE_SHIFT_EXT 0x201A
+#define WGL_ALPHA_BITS_EXT 0x201B
+#define WGL_ALPHA_SHIFT_EXT 0x201C
+#define WGL_ACCUM_BITS_EXT 0x201D
+#define WGL_ACCUM_RED_BITS_EXT 0x201E
+#define WGL_ACCUM_GREEN_BITS_EXT 0x201F
+#define WGL_ACCUM_BLUE_BITS_EXT 0x2020
+#define WGL_ACCUM_ALPHA_BITS_EXT 0x2021
+#define WGL_DEPTH_BITS_EXT 0x2022
+#define WGL_STENCIL_BITS_EXT 0x2023
+#define WGL_AUX_BUFFERS_EXT 0x2024
+#define WGL_NO_ACCELERATION_EXT 0x2025
+#define WGL_GENERIC_ACCELERATION_EXT 0x2026
+#define WGL_FULL_ACCELERATION_EXT 0x2027
+#define WGL_SWAP_EXCHANGE_EXT 0x2028
+#define WGL_SWAP_COPY_EXT 0x2029
+#define WGL_SWAP_UNDEFINED_EXT 0x202A
+#define WGL_TYPE_RGBA_EXT 0x202B
+#define WGL_TYPE_COLORINDEX_EXT 0x202C
+#endif
+
+#ifndef WGL_EXT_pbuffer
+#define WGL_DRAW_TO_PBUFFER_EXT 0x202D
+#define WGL_MAX_PBUFFER_PIXELS_EXT 0x202E
+#define WGL_MAX_PBUFFER_WIDTH_EXT 0x202F
+#define WGL_MAX_PBUFFER_HEIGHT_EXT 0x2030
+#define WGL_OPTIMAL_PBUFFER_WIDTH_EXT 0x2031
+#define WGL_OPTIMAL_PBUFFER_HEIGHT_EXT 0x2032
+#define WGL_PBUFFER_LARGEST_EXT 0x2033
+#define WGL_PBUFFER_WIDTH_EXT 0x2034
+#define WGL_PBUFFER_HEIGHT_EXT 0x2035
+#endif
+
+#ifndef WGL_EXT_depth_float
+#define WGL_DEPTH_FLOAT_EXT 0x2040
+#endif
+
+#ifndef WGL_3DFX_multisample
+#define WGL_SAMPLE_BUFFERS_3DFX 0x2060
+#define WGL_SAMPLES_3DFX 0x2061
+#endif
+
+#ifndef WGL_EXT_multisample
+#define WGL_SAMPLE_BUFFERS_EXT 0x2041
+#define WGL_SAMPLES_EXT 0x2042
+#endif
+
+#ifndef WGL_I3D_digital_video_control
+#define WGL_DIGITAL_VIDEO_CURSOR_ALPHA_FRAMEBUFFER_I3D 0x2050
+#define WGL_DIGITAL_VIDEO_CURSOR_ALPHA_VALUE_I3D 0x2051
+#define WGL_DIGITAL_VIDEO_CURSOR_INCLUDED_I3D 0x2052
+#define WGL_DIGITAL_VIDEO_GAMMA_CORRECTED_I3D 0x2053
+#endif
+
+#ifndef WGL_I3D_gamma
+#define WGL_GAMMA_TABLE_SIZE_I3D 0x204E
+#define WGL_GAMMA_EXCLUDE_DESKTOP_I3D 0x204F
+#endif
+
+#ifndef WGL_I3D_genlock
+#define WGL_GENLOCK_SOURCE_MULTIVIEW_I3D 0x2044
+#define WGL_GENLOCK_SOURCE_EXTENAL_SYNC_I3D 0x2045
+#define WGL_GENLOCK_SOURCE_EXTENAL_FIELD_I3D 0x2046
+#define WGL_GENLOCK_SOURCE_EXTENAL_TTL_I3D 0x2047
+#define WGL_GENLOCK_SOURCE_DIGITAL_SYNC_I3D 0x2048
+#define WGL_GENLOCK_SOURCE_DIGITAL_FIELD_I3D 0x2049
+#define WGL_GENLOCK_SOURCE_EDGE_FALLING_I3D 0x204A
+#define WGL_GENLOCK_SOURCE_EDGE_RISING_I3D 0x204B
+#define WGL_GENLOCK_SOURCE_EDGE_BOTH_I3D 0x204C
+#endif
+
+#ifndef WGL_I3D_image_buffer
+#define WGL_IMAGE_BUFFER_MIN_ACCESS_I3D 0x00000001
+#define WGL_IMAGE_BUFFER_LOCK_I3D 0x00000002
+#endif
+
+#ifndef WGL_I3D_swap_frame_lock
+#endif
+
+#ifndef WGL_NV_render_depth_texture
+#define WGL_BIND_TO_TEXTURE_DEPTH_NV 0x20A3
+#define WGL_BIND_TO_TEXTURE_RECTANGLE_DEPTH_NV 0x20A4
+#define WGL_DEPTH_TEXTURE_FORMAT_NV 0x20A5
+#define WGL_TEXTURE_DEPTH_COMPONENT_NV 0x20A6
+#define WGL_DEPTH_COMPONENT_NV 0x20A7
+#endif
+
+#ifndef WGL_NV_render_texture_rectangle
+#define WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV 0x20A0
+#define WGL_BIND_TO_TEXTURE_RECTANGLE_RGBA_NV 0x20A1
+#define WGL_TEXTURE_RECTANGLE_NV 0x20A2
+#endif
+
+#ifndef WGL_ATI_pixel_format_float
+#define WGL_TYPE_RGBA_FLOAT_ATI 0x21A0
+#endif
+
+#ifndef WGL_NV_float_buffer
+#define WGL_FLOAT_COMPONENTS_NV 0x20B0
+#define WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_R_NV 0x20B1
+#define WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RG_NV 0x20B2
+#define WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGB_NV 0x20B3
+#define WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGBA_NV 0x20B4
+#define WGL_TEXTURE_FLOAT_R_NV 0x20B5
+#define WGL_TEXTURE_FLOAT_RG_NV 0x20B6
+#define WGL_TEXTURE_FLOAT_RGB_NV 0x20B7
+#define WGL_TEXTURE_FLOAT_RGBA_NV 0x20B8
+#endif
+
+#ifndef WGL_3DL_stereo_control
+#define WGL_STEREO_EMITTER_ENABLE_3DL 0x2055
+#define WGL_STEREO_EMITTER_DISABLE_3DL 0x2056
+#define WGL_STEREO_POLARITY_NORMAL_3DL 0x2057
+#define WGL_STEREO_POLARITY_INVERT_3DL 0x2058
+#endif
+
+#ifndef WGL_EXT_pixel_format_packed_float
+#define WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT 0x20A8
+#endif
+
+#ifndef WGL_EXT_framebuffer_sRGB
+#define WGL_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x20A9
+#endif
+
+#ifndef WGL_NV_present_video
+#define WGL_NUM_VIDEO_SLOTS_NV 0x20F0
+#endif
+
+#ifndef WGL_NV_video_out
+#define WGL_BIND_TO_VIDEO_RGB_NV 0x20C0
+#define WGL_BIND_TO_VIDEO_RGBA_NV 0x20C1
+#define WGL_BIND_TO_VIDEO_RGB_AND_DEPTH_NV 0x20C2
+#define WGL_VIDEO_OUT_COLOR_NV 0x20C3
+#define WGL_VIDEO_OUT_ALPHA_NV 0x20C4
+#define WGL_VIDEO_OUT_DEPTH_NV 0x20C5
+#define WGL_VIDEO_OUT_COLOR_AND_ALPHA_NV 0x20C6
+#define WGL_VIDEO_OUT_COLOR_AND_DEPTH_NV 0x20C7
+#define WGL_VIDEO_OUT_FRAME 0x20C8
+#define WGL_VIDEO_OUT_FIELD_1 0x20C9
+#define WGL_VIDEO_OUT_FIELD_2 0x20CA
+#define WGL_VIDEO_OUT_STACKED_FIELDS_1_2 0x20CB
+#define WGL_VIDEO_OUT_STACKED_FIELDS_2_1 0x20CC
+#endif
+
+#ifndef WGL_NV_swap_group
+#endif
+
+#ifndef WGL_NV_gpu_affinity
+#define WGL_ERROR_INCOMPATIBLE_AFFINITY_MASKS_NV 0x20D0
+#define WGL_ERROR_MISSING_AFFINITY_MASK_NV 0x20D1
+#endif
+
+#ifndef WGL_AMD_gpu_association
+#define WGL_GPU_VENDOR_AMD 0x1F00
+#define WGL_GPU_RENDERER_STRING_AMD 0x1F01
+#define WGL_GPU_OPENGL_VERSION_STRING_AMD 0x1F02
+#define WGL_GPU_FASTEST_TARGET_GPUS_AMD 0x21A2
+#define WGL_GPU_RAM_AMD 0x21A3
+#define WGL_GPU_CLOCK_AMD 0x21A4
+#define WGL_GPU_NUM_PIPES_AMD 0x21A5
+#define WGL_GPU_NUM_SIMD_AMD 0x21A6
+#define WGL_GPU_NUM_RB_AMD 0x21A7
+#define WGL_GPU_NUM_SPI_AMD 0x21A8
+#endif
+
+#ifndef WGL_NV_video_capture
+#define WGL_UNIQUE_ID_NV 0x20CE
+#define WGL_NUM_VIDEO_CAPTURE_SLOTS_NV 0x20CF
+#endif
+
+#ifndef WGL_NV_copy_image
+#endif
+
+#ifndef WGL_NV_multisample_coverage
+#define WGL_COVERAGE_SAMPLES_NV 0x2042
+#define WGL_COLOR_SAMPLES_NV 0x20B9
+#endif
+
+#ifndef WGL_EXT_create_context_es2_profile
+#define WGL_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
+#endif
+
+
+/*************************************************************/
+
+#ifndef WGL_ARB_pbuffer
+DECLARE_HANDLE(HPBUFFERARB);
+#endif
+#ifndef WGL_EXT_pbuffer
+DECLARE_HANDLE(HPBUFFEREXT);
+#endif
+#ifndef WGL_NV_present_video
+DECLARE_HANDLE(HVIDEOOUTPUTDEVICENV);
+#endif
+#ifndef WGL_NV_video_output
+DECLARE_HANDLE(HPVIDEODEV);
+#endif
+#ifndef WGL_NV_gpu_affinity
+DECLARE_HANDLE(HPGPUNV);
+DECLARE_HANDLE(HGPUNV);
+
+typedef struct _GPU_DEVICE {
+ DWORD cb;
+ CHAR DeviceName[32];
+ CHAR DeviceString[128];
+ DWORD Flags;
+ RECT rcVirtualScreen;
+} GPU_DEVICE, *PGPU_DEVICE;
+#endif
+#ifndef WGL_NV_video_capture
+DECLARE_HANDLE(HVIDEOINPUTDEVICENV);
+#endif
+
+#ifndef WGL_ARB_buffer_region
+#define WGL_ARB_buffer_region 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern HANDLE WINAPI wglCreateBufferRegionARB (HDC hDC, int iLayerPlane, UINT uType);
+extern VOID WINAPI wglDeleteBufferRegionARB (HANDLE hRegion);
+extern BOOL WINAPI wglSaveBufferRegionARB (HANDLE hRegion, int x, int y, int width, int height);
+extern BOOL WINAPI wglRestoreBufferRegionARB (HANDLE hRegion, int x, int y, int width, int height, int xSrc, int ySrc);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef HANDLE (WINAPI * PFNWGLCREATEBUFFERREGIONARBPROC) (HDC hDC, int iLayerPlane, UINT uType);
+typedef VOID (WINAPI * PFNWGLDELETEBUFFERREGIONARBPROC) (HANDLE hRegion);
+typedef BOOL (WINAPI * PFNWGLSAVEBUFFERREGIONARBPROC) (HANDLE hRegion, int x, int y, int width, int height);
+typedef BOOL (WINAPI * PFNWGLRESTOREBUFFERREGIONARBPROC) (HANDLE hRegion, int x, int y, int width, int height, int xSrc, int ySrc);
+#endif
+
+#ifndef WGL_ARB_multisample
+#define WGL_ARB_multisample 1
+#endif
+
+#ifndef WGL_ARB_extensions_string
+#define WGL_ARB_extensions_string 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern const char * WINAPI wglGetExtensionsStringARB (HDC hdc);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc);
+#endif
+
+#ifndef WGL_ARB_pixel_format
+#define WGL_ARB_pixel_format 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglGetPixelFormatAttribivARB (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
+extern BOOL WINAPI wglGetPixelFormatAttribfvARB (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues);
+extern BOOL WINAPI wglChoosePixelFormatARB (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
+typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBFVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues);
+typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
+#endif
+
+#ifndef WGL_ARB_make_current_read
+#define WGL_ARB_make_current_read 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglMakeContextCurrentARB (HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
+extern HDC WINAPI wglGetCurrentReadDCARB (void);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLMAKECONTEXTCURRENTARBPROC) (HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
+typedef HDC (WINAPI * PFNWGLGETCURRENTREADDCARBPROC) (void);
+#endif
+
+#ifndef WGL_ARB_pbuffer
+#define WGL_ARB_pbuffer 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern HPBUFFERARB WINAPI wglCreatePbufferARB (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
+extern HDC WINAPI wglGetPbufferDCARB (HPBUFFERARB hPbuffer);
+extern int WINAPI wglReleasePbufferDCARB (HPBUFFERARB hPbuffer, HDC hDC);
+extern BOOL WINAPI wglDestroyPbufferARB (HPBUFFERARB hPbuffer);
+extern BOOL WINAPI wglQueryPbufferARB (HPBUFFERARB hPbuffer, int iAttribute, int *piValue);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef HPBUFFERARB (WINAPI * PFNWGLCREATEPBUFFERARBPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
+typedef HDC (WINAPI * PFNWGLGETPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer);
+typedef int (WINAPI * PFNWGLRELEASEPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer, HDC hDC);
+typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFERARBPROC) (HPBUFFERARB hPbuffer);
+typedef BOOL (WINAPI * PFNWGLQUERYPBUFFERARBPROC) (HPBUFFERARB hPbuffer, int iAttribute, int *piValue);
+#endif
+
+#ifndef WGL_ARB_render_texture
+#define WGL_ARB_render_texture 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglBindTexImageARB (HPBUFFERARB hPbuffer, int iBuffer);
+extern BOOL WINAPI wglReleaseTexImageARB (HPBUFFERARB hPbuffer, int iBuffer);
+extern BOOL WINAPI wglSetPbufferAttribARB (HPBUFFERARB hPbuffer, const int *piAttribList);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLBINDTEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer);
+typedef BOOL (WINAPI * PFNWGLRELEASETEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer);
+typedef BOOL (WINAPI * PFNWGLSETPBUFFERATTRIBARBPROC) (HPBUFFERARB hPbuffer, const int *piAttribList);
+#endif
+
+#ifndef WGL_ARB_pixel_format_float
+#define WGL_ARB_pixel_format_float 1
+#endif
+
+#ifndef WGL_ARB_framebuffer_sRGB
+#define WGL_ARB_framebuffer_sRGB 1
+#endif
+
+#ifndef WGL_ARB_create_context
+#define WGL_ARB_create_context 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern HGLRC WINAPI wglCreateContextAttribsARB (HDC hDC, HGLRC hShareContext, const int *attribList);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC, HGLRC hShareContext, const int *attribList);
+#endif
+
+#ifndef WGL_ARB_create_context_profile
+#define WGL_ARB_create_context_profile 1
+#endif
+
+#ifndef WGL_ARB_create_context_robustness
+#define WGL_ARB_create_context_robustness 1
+#endif
+
+#ifndef WGL_EXT_display_color_table
+#define WGL_EXT_display_color_table 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern GLboolean WINAPI wglCreateDisplayColorTableEXT (GLushort id);
+extern GLboolean WINAPI wglLoadDisplayColorTableEXT (const GLushort *table, GLuint length);
+extern GLboolean WINAPI wglBindDisplayColorTableEXT (GLushort id);
+extern VOID WINAPI wglDestroyDisplayColorTableEXT (GLushort id);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef GLboolean (WINAPI * PFNWGLCREATEDISPLAYCOLORTABLEEXTPROC) (GLushort id);
+typedef GLboolean (WINAPI * PFNWGLLOADDISPLAYCOLORTABLEEXTPROC) (const GLushort *table, GLuint length);
+typedef GLboolean (WINAPI * PFNWGLBINDDISPLAYCOLORTABLEEXTPROC) (GLushort id);
+typedef VOID (WINAPI * PFNWGLDESTROYDISPLAYCOLORTABLEEXTPROC) (GLushort id);
+#endif
+
+#ifndef WGL_EXT_extensions_string
+#define WGL_EXT_extensions_string 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern const char * WINAPI wglGetExtensionsStringEXT (void);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGEXTPROC) (void);
+#endif
+
+#ifndef WGL_EXT_make_current_read
+#define WGL_EXT_make_current_read 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglMakeContextCurrentEXT (HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
+extern HDC WINAPI wglGetCurrentReadDCEXT (void);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLMAKECONTEXTCURRENTEXTPROC) (HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
+typedef HDC (WINAPI * PFNWGLGETCURRENTREADDCEXTPROC) (void);
+#endif
+
+#ifndef WGL_EXT_pbuffer
+#define WGL_EXT_pbuffer 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern HPBUFFEREXT WINAPI wglCreatePbufferEXT (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
+extern HDC WINAPI wglGetPbufferDCEXT (HPBUFFEREXT hPbuffer);
+extern int WINAPI wglReleasePbufferDCEXT (HPBUFFEREXT hPbuffer, HDC hDC);
+extern BOOL WINAPI wglDestroyPbufferEXT (HPBUFFEREXT hPbuffer);
+extern BOOL WINAPI wglQueryPbufferEXT (HPBUFFEREXT hPbuffer, int iAttribute, int *piValue);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef HPBUFFEREXT (WINAPI * PFNWGLCREATEPBUFFEREXTPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
+typedef HDC (WINAPI * PFNWGLGETPBUFFERDCEXTPROC) (HPBUFFEREXT hPbuffer);
+typedef int (WINAPI * PFNWGLRELEASEPBUFFERDCEXTPROC) (HPBUFFEREXT hPbuffer, HDC hDC);
+typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFEREXTPROC) (HPBUFFEREXT hPbuffer);
+typedef BOOL (WINAPI * PFNWGLQUERYPBUFFEREXTPROC) (HPBUFFEREXT hPbuffer, int iAttribute, int *piValue);
+#endif
+
+#ifndef WGL_EXT_pixel_format
+#define WGL_EXT_pixel_format 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglGetPixelFormatAttribivEXT (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, int *piValues);
+extern BOOL WINAPI wglGetPixelFormatAttribfvEXT (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, FLOAT *pfValues);
+extern BOOL WINAPI wglChoosePixelFormatEXT (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVEXTPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, int *piValues);
+typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBFVEXTPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, FLOAT *pfValues);
+typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATEXTPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
+#endif
+
+#ifndef WGL_EXT_swap_control
+#define WGL_EXT_swap_control 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglSwapIntervalEXT (int interval);
+extern int WINAPI wglGetSwapIntervalEXT (void);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLSWAPINTERVALEXTPROC) (int interval);
+typedef int (WINAPI * PFNWGLGETSWAPINTERVALEXTPROC) (void);
+#endif
+
+#ifndef WGL_EXT_depth_float
+#define WGL_EXT_depth_float 1
+#endif
+
+#ifndef WGL_NV_vertex_array_range
+#define WGL_NV_vertex_array_range 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern void* WINAPI wglAllocateMemoryNV (GLsizei size, GLfloat readfreq, GLfloat writefreq, GLfloat priority);
+extern void WINAPI wglFreeMemoryNV (void *pointer);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef void* (WINAPI * PFNWGLALLOCATEMEMORYNVPROC) (GLsizei size, GLfloat readfreq, GLfloat writefreq, GLfloat priority);
+typedef void (WINAPI * PFNWGLFREEMEMORYNVPROC) (void *pointer);
+#endif
+
+#ifndef WGL_3DFX_multisample
+#define WGL_3DFX_multisample 1
+#endif
+
+#ifndef WGL_EXT_multisample
+#define WGL_EXT_multisample 1
+#endif
+
+#ifndef WGL_OML_sync_control
+#define WGL_OML_sync_control 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglGetSyncValuesOML (HDC hdc, INT64 *ust, INT64 *msc, INT64 *sbc);
+extern BOOL WINAPI wglGetMscRateOML (HDC hdc, INT32 *numerator, INT32 *denominator);
+extern INT64 WINAPI wglSwapBuffersMscOML (HDC hdc, INT64 target_msc, INT64 divisor, INT64 remainder);
+extern INT64 WINAPI wglSwapLayerBuffersMscOML (HDC hdc, int fuPlanes, INT64 target_msc, INT64 divisor, INT64 remainder);
+extern BOOL WINAPI wglWaitForMscOML (HDC hdc, INT64 target_msc, INT64 divisor, INT64 remainder, INT64 *ust, INT64 *msc, INT64 *sbc);
+extern BOOL WINAPI wglWaitForSbcOML (HDC hdc, INT64 target_sbc, INT64 *ust, INT64 *msc, INT64 *sbc);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLGETSYNCVALUESOMLPROC) (HDC hdc, INT64 *ust, INT64 *msc, INT64 *sbc);
+typedef BOOL (WINAPI * PFNWGLGETMSCRATEOMLPROC) (HDC hdc, INT32 *numerator, INT32 *denominator);
+typedef INT64 (WINAPI * PFNWGLSWAPBUFFERSMSCOMLPROC) (HDC hdc, INT64 target_msc, INT64 divisor, INT64 remainder);
+typedef INT64 (WINAPI * PFNWGLSWAPLAYERBUFFERSMSCOMLPROC) (HDC hdc, int fuPlanes, INT64 target_msc, INT64 divisor, INT64 remainder);
+typedef BOOL (WINAPI * PFNWGLWAITFORMSCOMLPROC) (HDC hdc, INT64 target_msc, INT64 divisor, INT64 remainder, INT64 *ust, INT64 *msc, INT64 *sbc);
+typedef BOOL (WINAPI * PFNWGLWAITFORSBCOMLPROC) (HDC hdc, INT64 target_sbc, INT64 *ust, INT64 *msc, INT64 *sbc);
+#endif
+
+#ifndef WGL_I3D_digital_video_control
+#define WGL_I3D_digital_video_control 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglGetDigitalVideoParametersI3D (HDC hDC, int iAttribute, int *piValue);
+extern BOOL WINAPI wglSetDigitalVideoParametersI3D (HDC hDC, int iAttribute, const int *piValue);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLGETDIGITALVIDEOPARAMETERSI3DPROC) (HDC hDC, int iAttribute, int *piValue);
+typedef BOOL (WINAPI * PFNWGLSETDIGITALVIDEOPARAMETERSI3DPROC) (HDC hDC, int iAttribute, const int *piValue);
+#endif
+
+#ifndef WGL_I3D_gamma
+#define WGL_I3D_gamma 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglGetGammaTableParametersI3D (HDC hDC, int iAttribute, int *piValue);
+extern BOOL WINAPI wglSetGammaTableParametersI3D (HDC hDC, int iAttribute, const int *piValue);
+extern BOOL WINAPI wglGetGammaTableI3D (HDC hDC, int iEntries, USHORT *puRed, USHORT *puGreen, USHORT *puBlue);
+extern BOOL WINAPI wglSetGammaTableI3D (HDC hDC, int iEntries, const USHORT *puRed, const USHORT *puGreen, const USHORT *puBlue);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLGETGAMMATABLEPARAMETERSI3DPROC) (HDC hDC, int iAttribute, int *piValue);
+typedef BOOL (WINAPI * PFNWGLSETGAMMATABLEPARAMETERSI3DPROC) (HDC hDC, int iAttribute, const int *piValue);
+typedef BOOL (WINAPI * PFNWGLGETGAMMATABLEI3DPROC) (HDC hDC, int iEntries, USHORT *puRed, USHORT *puGreen, USHORT *puBlue);
+typedef BOOL (WINAPI * PFNWGLSETGAMMATABLEI3DPROC) (HDC hDC, int iEntries, const USHORT *puRed, const USHORT *puGreen, const USHORT *puBlue);
+#endif
+
+#ifndef WGL_I3D_genlock
+#define WGL_I3D_genlock 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglEnableGenlockI3D (HDC hDC);
+extern BOOL WINAPI wglDisableGenlockI3D (HDC hDC);
+extern BOOL WINAPI wglIsEnabledGenlockI3D (HDC hDC, BOOL *pFlag);
+extern BOOL WINAPI wglGenlockSourceI3D (HDC hDC, UINT uSource);
+extern BOOL WINAPI wglGetGenlockSourceI3D (HDC hDC, UINT *uSource);
+extern BOOL WINAPI wglGenlockSourceEdgeI3D (HDC hDC, UINT uEdge);
+extern BOOL WINAPI wglGetGenlockSourceEdgeI3D (HDC hDC, UINT *uEdge);
+extern BOOL WINAPI wglGenlockSampleRateI3D (HDC hDC, UINT uRate);
+extern BOOL WINAPI wglGetGenlockSampleRateI3D (HDC hDC, UINT *uRate);
+extern BOOL WINAPI wglGenlockSourceDelayI3D (HDC hDC, UINT uDelay);
+extern BOOL WINAPI wglGetGenlockSourceDelayI3D (HDC hDC, UINT *uDelay);
+extern BOOL WINAPI wglQueryGenlockMaxSourceDelayI3D (HDC hDC, UINT *uMaxLineDelay, UINT *uMaxPixelDelay);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLENABLEGENLOCKI3DPROC) (HDC hDC);
+typedef BOOL (WINAPI * PFNWGLDISABLEGENLOCKI3DPROC) (HDC hDC);
+typedef BOOL (WINAPI * PFNWGLISENABLEDGENLOCKI3DPROC) (HDC hDC, BOOL *pFlag);
+typedef BOOL (WINAPI * PFNWGLGENLOCKSOURCEI3DPROC) (HDC hDC, UINT uSource);
+typedef BOOL (WINAPI * PFNWGLGETGENLOCKSOURCEI3DPROC) (HDC hDC, UINT *uSource);
+typedef BOOL (WINAPI * PFNWGLGENLOCKSOURCEEDGEI3DPROC) (HDC hDC, UINT uEdge);
+typedef BOOL (WINAPI * PFNWGLGETGENLOCKSOURCEEDGEI3DPROC) (HDC hDC, UINT *uEdge);
+typedef BOOL (WINAPI * PFNWGLGENLOCKSAMPLERATEI3DPROC) (HDC hDC, UINT uRate);
+typedef BOOL (WINAPI * PFNWGLGETGENLOCKSAMPLERATEI3DPROC) (HDC hDC, UINT *uRate);
+typedef BOOL (WINAPI * PFNWGLGENLOCKSOURCEDELAYI3DPROC) (HDC hDC, UINT uDelay);
+typedef BOOL (WINAPI * PFNWGLGETGENLOCKSOURCEDELAYI3DPROC) (HDC hDC, UINT *uDelay);
+typedef BOOL (WINAPI * PFNWGLQUERYGENLOCKMAXSOURCEDELAYI3DPROC) (HDC hDC, UINT *uMaxLineDelay, UINT *uMaxPixelDelay);
+#endif
+
+#ifndef WGL_I3D_image_buffer
+#define WGL_I3D_image_buffer 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern LPVOID WINAPI wglCreateImageBufferI3D (HDC hDC, DWORD dwSize, UINT uFlags);
+extern BOOL WINAPI wglDestroyImageBufferI3D (HDC hDC, LPVOID pAddress);
+extern BOOL WINAPI wglAssociateImageBufferEventsI3D (HDC hDC, const HANDLE *pEvent, const LPVOID *pAddress, const DWORD *pSize, UINT count);
+extern BOOL WINAPI wglReleaseImageBufferEventsI3D (HDC hDC, const LPVOID *pAddress, UINT count);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef LPVOID (WINAPI * PFNWGLCREATEIMAGEBUFFERI3DPROC) (HDC hDC, DWORD dwSize, UINT uFlags);
+typedef BOOL (WINAPI * PFNWGLDESTROYIMAGEBUFFERI3DPROC) (HDC hDC, LPVOID pAddress);
+typedef BOOL (WINAPI * PFNWGLASSOCIATEIMAGEBUFFEREVENTSI3DPROC) (HDC hDC, const HANDLE *pEvent, const LPVOID *pAddress, const DWORD *pSize, UINT count);
+typedef BOOL (WINAPI * PFNWGLRELEASEIMAGEBUFFEREVENTSI3DPROC) (HDC hDC, const LPVOID *pAddress, UINT count);
+#endif
+
+#ifndef WGL_I3D_swap_frame_lock
+#define WGL_I3D_swap_frame_lock 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglEnableFrameLockI3D (void);
+extern BOOL WINAPI wglDisableFrameLockI3D (void);
+extern BOOL WINAPI wglIsEnabledFrameLockI3D (BOOL *pFlag);
+extern BOOL WINAPI wglQueryFrameLockMasterI3D (BOOL *pFlag);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLENABLEFRAMELOCKI3DPROC) (void);
+typedef BOOL (WINAPI * PFNWGLDISABLEFRAMELOCKI3DPROC) (void);
+typedef BOOL (WINAPI * PFNWGLISENABLEDFRAMELOCKI3DPROC) (BOOL *pFlag);
+typedef BOOL (WINAPI * PFNWGLQUERYFRAMELOCKMASTERI3DPROC) (BOOL *pFlag);
+#endif
+
+#ifndef WGL_I3D_swap_frame_usage
+#define WGL_I3D_swap_frame_usage 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglGetFrameUsageI3D (float *pUsage);
+extern BOOL WINAPI wglBeginFrameTrackingI3D (void);
+extern BOOL WINAPI wglEndFrameTrackingI3D (void);
+extern BOOL WINAPI wglQueryFrameTrackingI3D (DWORD *pFrameCount, DWORD *pMissedFrames, float *pLastMissedUsage);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLGETFRAMEUSAGEI3DPROC) (float *pUsage);
+typedef BOOL (WINAPI * PFNWGLBEGINFRAMETRACKINGI3DPROC) (void);
+typedef BOOL (WINAPI * PFNWGLENDFRAMETRACKINGI3DPROC) (void);
+typedef BOOL (WINAPI * PFNWGLQUERYFRAMETRACKINGI3DPROC) (DWORD *pFrameCount, DWORD *pMissedFrames, float *pLastMissedUsage);
+#endif
+
+#ifndef WGL_ATI_pixel_format_float
+#define WGL_ATI_pixel_format_float 1
+#endif
+
+#ifndef WGL_NV_float_buffer
+#define WGL_NV_float_buffer 1
+#endif
+
+#ifndef WGL_3DL_stereo_control
+#define WGL_3DL_stereo_control 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglSetStereoEmitterState3DL (HDC hDC, UINT uState);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLSETSTEREOEMITTERSTATE3DLPROC) (HDC hDC, UINT uState);
+#endif
+
+#ifndef WGL_EXT_pixel_format_packed_float
+#define WGL_EXT_pixel_format_packed_float 1
+#endif
+
+#ifndef WGL_EXT_framebuffer_sRGB
+#define WGL_EXT_framebuffer_sRGB 1
+#endif
+
+#ifndef WGL_NV_present_video
+#define WGL_NV_present_video 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern int WINAPI wglEnumerateVideoDevicesNV (HDC hDC, HVIDEOOUTPUTDEVICENV *phDeviceList);
+extern BOOL WINAPI wglBindVideoDeviceNV (HDC hDC, unsigned int uVideoSlot, HVIDEOOUTPUTDEVICENV hVideoDevice, const int *piAttribList);
+extern BOOL WINAPI wglQueryCurrentContextNV (int iAttribute, int *piValue);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef int (WINAPI * PFNWGLENUMERATEVIDEODEVICESNVPROC) (HDC hDC, HVIDEOOUTPUTDEVICENV *phDeviceList);
+typedef BOOL (WINAPI * PFNWGLBINDVIDEODEVICENVPROC) (HDC hDC, unsigned int uVideoSlot, HVIDEOOUTPUTDEVICENV hVideoDevice, const int *piAttribList);
+typedef BOOL (WINAPI * PFNWGLQUERYCURRENTCONTEXTNVPROC) (int iAttribute, int *piValue);
+#endif
+
+#ifndef WGL_NV_video_output
+#define WGL_NV_video_output 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglGetVideoDeviceNV (HDC hDC, int numDevices, HPVIDEODEV *hVideoDevice);
+extern BOOL WINAPI wglReleaseVideoDeviceNV (HPVIDEODEV hVideoDevice);
+extern BOOL WINAPI wglBindVideoImageNV (HPVIDEODEV hVideoDevice, HPBUFFERARB hPbuffer, int iVideoBuffer);
+extern BOOL WINAPI wglReleaseVideoImageNV (HPBUFFERARB hPbuffer, int iVideoBuffer);
+extern BOOL WINAPI wglSendPbufferToVideoNV (HPBUFFERARB hPbuffer, int iBufferType, unsigned long *pulCounterPbuffer, BOOL bBlock);
+extern BOOL WINAPI wglGetVideoInfoNV (HPVIDEODEV hpVideoDevice, unsigned long *pulCounterOutputPbuffer, unsigned long *pulCounterOutputVideo);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLGETVIDEODEVICENVPROC) (HDC hDC, int numDevices, HPVIDEODEV *hVideoDevice);
+typedef BOOL (WINAPI * PFNWGLRELEASEVIDEODEVICENVPROC) (HPVIDEODEV hVideoDevice);
+typedef BOOL (WINAPI * PFNWGLBINDVIDEOIMAGENVPROC) (HPVIDEODEV hVideoDevice, HPBUFFERARB hPbuffer, int iVideoBuffer);
+typedef BOOL (WINAPI * PFNWGLRELEASEVIDEOIMAGENVPROC) (HPBUFFERARB hPbuffer, int iVideoBuffer);
+typedef BOOL (WINAPI * PFNWGLSENDPBUFFERTOVIDEONVPROC) (HPBUFFERARB hPbuffer, int iBufferType, unsigned long *pulCounterPbuffer, BOOL bBlock);
+typedef BOOL (WINAPI * PFNWGLGETVIDEOINFONVPROC) (HPVIDEODEV hpVideoDevice, unsigned long *pulCounterOutputPbuffer, unsigned long *pulCounterOutputVideo);
+#endif
+
+#ifndef WGL_NV_swap_group
+#define WGL_NV_swap_group 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglJoinSwapGroupNV (HDC hDC, GLuint group);
+extern BOOL WINAPI wglBindSwapBarrierNV (GLuint group, GLuint barrier);
+extern BOOL WINAPI wglQuerySwapGroupNV (HDC hDC, GLuint *group, GLuint *barrier);
+extern BOOL WINAPI wglQueryMaxSwapGroupsNV (HDC hDC, GLuint *maxGroups, GLuint *maxBarriers);
+extern BOOL WINAPI wglQueryFrameCountNV (HDC hDC, GLuint *count);
+extern BOOL WINAPI wglResetFrameCountNV (HDC hDC);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLJOINSWAPGROUPNVPROC) (HDC hDC, GLuint group);
+typedef BOOL (WINAPI * PFNWGLBINDSWAPBARRIERNVPROC) (GLuint group, GLuint barrier);
+typedef BOOL (WINAPI * PFNWGLQUERYSWAPGROUPNVPROC) (HDC hDC, GLuint *group, GLuint *barrier);
+typedef BOOL (WINAPI * PFNWGLQUERYMAXSWAPGROUPSNVPROC) (HDC hDC, GLuint *maxGroups, GLuint *maxBarriers);
+typedef BOOL (WINAPI * PFNWGLQUERYFRAMECOUNTNVPROC) (HDC hDC, GLuint *count);
+typedef BOOL (WINAPI * PFNWGLRESETFRAMECOUNTNVPROC) (HDC hDC);
+#endif
+
+#ifndef WGL_NV_gpu_affinity
+#define WGL_NV_gpu_affinity 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglEnumGpusNV (UINT iGpuIndex, HGPUNV *phGpu);
+extern BOOL WINAPI wglEnumGpuDevicesNV (HGPUNV hGpu, UINT iDeviceIndex, PGPU_DEVICE lpGpuDevice);
+extern HDC WINAPI wglCreateAffinityDCNV (const HGPUNV *phGpuList);
+extern BOOL WINAPI wglEnumGpusFromAffinityDCNV (HDC hAffinityDC, UINT iGpuIndex, HGPUNV *hGpu);
+extern BOOL WINAPI wglDeleteDCNV (HDC hdc);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLENUMGPUSNVPROC) (UINT iGpuIndex, HGPUNV *phGpu);
+typedef BOOL (WINAPI * PFNWGLENUMGPUDEVICESNVPROC) (HGPUNV hGpu, UINT iDeviceIndex, PGPU_DEVICE lpGpuDevice);
+typedef HDC (WINAPI * PFNWGLCREATEAFFINITYDCNVPROC) (const HGPUNV *phGpuList);
+typedef BOOL (WINAPI * PFNWGLENUMGPUSFROMAFFINITYDCNVPROC) (HDC hAffinityDC, UINT iGpuIndex, HGPUNV *hGpu);
+typedef BOOL (WINAPI * PFNWGLDELETEDCNVPROC) (HDC hdc);
+#endif
+
+#ifndef WGL_AMD_gpu_association
+#define WGL_AMD_gpu_association 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern UINT WINAPI wglGetGPUIDsAMD (UINT maxCount, UINT *ids);
+extern INT WINAPI wglGetGPUInfoAMD (UINT id, int property, GLenum dataType, UINT size, void *data);
+extern UINT WINAPI wglGetContextGPUIDAMD (HGLRC hglrc);
+extern HGLRC WINAPI wglCreateAssociatedContextAMD (UINT id);
+extern HGLRC WINAPI wglCreateAssociatedContextAttribsAMD (UINT id, HGLRC hShareContext, const int *attribList);
+extern BOOL WINAPI wglDeleteAssociatedContextAMD (HGLRC hglrc);
+extern BOOL WINAPI wglMakeAssociatedContextCurrentAMD (HGLRC hglrc);
+extern HGLRC WINAPI wglGetCurrentAssociatedContextAMD (void);
+extern VOID WINAPI wglBlitContextFramebufferAMD (HGLRC dstCtx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef UINT (WINAPI * PFNWGLGETGPUIDSAMDPROC) (UINT maxCount, UINT *ids);
+typedef INT (WINAPI * PFNWGLGETGPUINFOAMDPROC) (UINT id, int property, GLenum dataType, UINT size, void *data);
+typedef UINT (WINAPI * PFNWGLGETCONTEXTGPUIDAMDPROC) (HGLRC hglrc);
+typedef HGLRC (WINAPI * PFNWGLCREATEASSOCIATEDCONTEXTAMDPROC) (UINT id);
+typedef HGLRC (WINAPI * PFNWGLCREATEASSOCIATEDCONTEXTATTRIBSAMDPROC) (UINT id, HGLRC hShareContext, const int *attribList);
+typedef BOOL (WINAPI * PFNWGLDELETEASSOCIATEDCONTEXTAMDPROC) (HGLRC hglrc);
+typedef BOOL (WINAPI * PFNWGLMAKEASSOCIATEDCONTEXTCURRENTAMDPROC) (HGLRC hglrc);
+typedef HGLRC (WINAPI * PFNWGLGETCURRENTASSOCIATEDCONTEXTAMDPROC) (void);
+typedef VOID (WINAPI * PFNWGLBLITCONTEXTFRAMEBUFFERAMDPROC) (HGLRC dstCtx, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+#endif
+
+#ifndef WGL_NV_video_capture
+#define WGL_NV_video_capture 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglBindVideoCaptureDeviceNV (UINT uVideoSlot, HVIDEOINPUTDEVICENV hDevice);
+extern UINT WINAPI wglEnumerateVideoCaptureDevicesNV (HDC hDc, HVIDEOINPUTDEVICENV *phDeviceList);
+extern BOOL WINAPI wglLockVideoCaptureDeviceNV (HDC hDc, HVIDEOINPUTDEVICENV hDevice);
+extern BOOL WINAPI wglQueryVideoCaptureDeviceNV (HDC hDc, HVIDEOINPUTDEVICENV hDevice, int iAttribute, int *piValue);
+extern BOOL WINAPI wglReleaseVideoCaptureDeviceNV (HDC hDc, HVIDEOINPUTDEVICENV hDevice);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLBINDVIDEOCAPTUREDEVICENVPROC) (UINT uVideoSlot, HVIDEOINPUTDEVICENV hDevice);
+typedef UINT (WINAPI * PFNWGLENUMERATEVIDEOCAPTUREDEVICESNVPROC) (HDC hDc, HVIDEOINPUTDEVICENV *phDeviceList);
+typedef BOOL (WINAPI * PFNWGLLOCKVIDEOCAPTUREDEVICENVPROC) (HDC hDc, HVIDEOINPUTDEVICENV hDevice);
+typedef BOOL (WINAPI * PFNWGLQUERYVIDEOCAPTUREDEVICENVPROC) (HDC hDc, HVIDEOINPUTDEVICENV hDevice, int iAttribute, int *piValue);
+typedef BOOL (WINAPI * PFNWGLRELEASEVIDEOCAPTUREDEVICENVPROC) (HDC hDc, HVIDEOINPUTDEVICENV hDevice);
+#endif
+
+#ifndef WGL_NV_copy_image
+#define WGL_NV_copy_image 1
+#ifdef WGL_WGLEXT_PROTOTYPES
+extern BOOL WINAPI wglCopyImageSubDataNV (HGLRC hSrcRC, GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, HGLRC hDstRC, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
+#endif /* WGL_WGLEXT_PROTOTYPES */
+typedef BOOL (WINAPI * PFNWGLCOPYIMAGESUBDATANVPROC) (HGLRC hSrcRC, GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, HGLRC hDstRC, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei width, GLsizei height, GLsizei depth);
+#endif
+
+#ifndef WGL_NV_multisample_coverage
+#define WGL_NV_multisample_coverage 1
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+
+Libpng 1.5.2 - March 31, 2011
+
+This is a public release of libpng, intended for use in production codes.
+
+Files available for download:
+
+Source files with LF line endings (for Unix/Linux) and with a
+"configure" script
+
+ libpng-1.5.2.tar.xz (LZMA-compressed, recommended)
+ libpng-1.5.2.tar.gz
+ libpng-1.5.2.tar.bz2
+
+Source files with CRLF line endings (for Windows), without the
+"configure" script
+
+ lpng152.7z (LZMA-compressed, recommended)
+ lpng152.zip
+
+Other information:
+
+ libpng-1.5.2-README.txt
+ libpng-1.5.2-LICENSE.txt
+
+Changes since the last public release (1.5.2):
+
+ More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
+ check formal parameters names in function declarations (as well as
+ definitions) to see if they match a name in the global namespace.
+ Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
+ old VisualC++ preprocessor.
+ Turned on interlace handling in png_read_png().
+ Fixed gcc pendantic warnings.
+ Handle longjmp in Cygwin.
+ Fixed png_get_current_row_number() in the interlaced case.
+ Cleaned up ALPHA flags and transformations.
+ Implemented expansion to 16 bits.
+ Fixed mistake in the descriptions of user read_transform and write_transform
+ function prototypes in the manual. The row_info struct is png_row_infop.
+ Corrected png_get_current_row_number documentation
+ Fixed the read/write row callback documentation.
+ This documents the current behavior, where the callback is called after
+ every row with information pertaining to the next row.
+ Fixed scripts/makefile.vcwin32
+ Updated contrib/pngsuite/README to add the word "modify".
+ Define PNG_ALLOCATED and other attributes to blank when _MSC_VER<1300.
+ ifdef out mask arrays in pngread.c when interlacing is not supported.
+ Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
+ and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
+ from the makefiles.
+ Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
+ to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
+ Don't include standard header files in png.h while building the symbol table,
+ to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
+
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+(subscription required; visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe) or to glennrp at users.sourceforge.net
+
+Glenn R-P
--- /dev/null
+#if 0
+libpng_changes(){ /*
+CHANGES - changes for libpng
+
+Version 0.2
+ added reader into png.h
+ fixed small problems in stub file
+
+Version 0.3
+ added pull reader
+ split up pngwrite.c to several files
+ added pnglib.txt
+ added example.c
+ cleaned up writer, adding a few new transformations
+ fixed some bugs in writer
+ interfaced with zlib 0.5
+ added K&R support
+ added check for 64 KB blocks for 16 bit machines
+
+Version 0.4
+ cleaned up code and commented code
+ simplified time handling into png_time
+ created png_color_16 and png_color_8 to handle color needs
+ cleaned up color type defines
+ fixed various bugs
+ made various names more consistent
+ interfaced with zlib 0.71
+ cleaned up zTXt reader and writer (using zlib's Reset functions)
+ split transformations into pngrtran.c and pngwtran.c
+
+Version 0.5
+ interfaced with zlib 0.8
+ fixed many reading and writing bugs
+ saved using 3 spaces instead of tabs
+
+Version 0.6
+ added png_large_malloc() and png_large_free()
+ added png_size_t
+ cleaned up some compiler warnings
+ added png_start_read_image()
+
+Version 0.7
+ cleaned up lots of bugs
+ finished dithering and other stuff
+ added test program
+ changed name from pnglib to libpng
+
+Version 0.71 [June, 1995]
+ changed pngtest.png for zlib 0.93
+ fixed error in libpng.txt and example.c
+
+Version 0.8
+ cleaned up some bugs
+ added png_set_filler()
+ split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
+ added #define's to remove unwanted code
+ moved png_info_init() to png.c
+ added old_size into png_realloc()
+ added functions to manually set filtering and compression info
+ changed compression parameters based on image type
+ optimized filter selection code
+ added version info
+ changed external functions passing floats to doubles (k&r problems?)
+ put all the configurable stuff in pngconf.h
+ enabled png_set_shift to work with paletted images on read
+ added png_read_update_info() - updates info structure with transformations
+
+Version 0.81 [August, 1995]
+ incorporated Tim Wegner's medium model code (thanks, Tim)
+
+Version 0.82 [September, 1995]
+ [unspecified changes]
+
+Version 0.85 [December, 1995]
+ added more medium model code (almost everything's a far)
+ added i/o, error, and memory callback functions
+ fixed some bugs (16 bit, 4 bit interlaced, etc.)
+ added first run progressive reader (barely tested)
+
+Version 0.86 [January, 1996]
+ fixed bugs
+ improved documentation
+
+Version 0.87 [January, 1996]
+ fixed medium model bugs
+ fixed other bugs introduced in 0.85 and 0.86
+ added some minor documentation
+
+Version 0.88 [January, 1996]
+ fixed progressive bugs
+ replaced tabs with spaces
+ cleaned up documentation
+ added callbacks for read/write and warning/error functions
+
+Version 0.89 [July, 1996]
+ Added new initialization API to make libpng work better with shared libs
+ we now have png_create_read_struct(), png_create_write_struct(),
+ png_create_info_struct(), png_destroy_read_struct(), and
+ png_destroy_write_struct() instead of the separate calls to
+ malloc and png_read_init(), png_info_init(), and png_write_init()
+ Changed warning/error callback functions to fix bug - this means you
+ should use the new initialization API if you were using the old
+ png_set_message_fn() calls, and that the old API no longer exists
+ so that people are aware that they need to change their code
+ Changed filter selection API to allow selection of multiple filters
+ since it didn't work in previous versions of libpng anyways
+ Optimized filter selection code
+ Fixed png_set_background() to allow using an arbitrary RGB color for
+ paletted images
+ Fixed gamma and background correction for paletted images, so
+ png_correct_palette is not needed unless you are correcting an
+ external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
+ in pngconf.h) - if nobody uses this, it may disappear in the future.
+ Fixed bug with Borland 64K memory allocation (Alexander Lehmann)
+ Fixed bug in interlace handling (Smarasderagd, I think)
+ Added more error checking for writing and image to reduce invalid files
+ Separated read and write functions so that they won't both be linked
+ into a binary when only reading or writing functionality is used
+ New pngtest image also has interlacing and zTXt
+ Updated documentation to reflect new API
+
+Version 0.90 [January, 1997]
+ Made CRC errors/warnings on critical and ancillary chunks configurable
+ libpng will use the zlib CRC routines by (compile-time) default
+ Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
+ Added external C++ wrapper statements to png.h (Gilles Dauphin)
+ Allow PNG file to be read when some or all of file signature has already
+ been read from the beginning of the stream. ****This affects the size
+ of info_struct and invalidates all programs that use a shared libpng****
+ Fixed png_filler() declarations
+ Fixed? background color conversions
+ Fixed order of error function pointers to match documentation
+ Current chunk name is now available in png_struct to reduce the number
+ of nearly identical error messages (will simplify multi-lingual
+ support when available)
+ Try to get ready for unknown-chunk callback functions:
+ - previously read critical chunks are flagged, so the chunk handling
+ routines can determine if the chunk is in the right place
+ - all chunk handling routines have the same prototypes, so we will
+ be able to handle all chunks via a callback mechanism
+ Try to fix Linux "setjmp" buffer size problems
+ Removed png_large_malloc, png_large_free, and png_realloc functions.
+
+Version 0.95 [March, 1997]
+ Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
+ Fixed bug in PNG file signature compares when start != 0
+ Changed parameter type of png_set_filler(...filler...) from png_byte
+ to png_uint_32
+ Added test for MACOS to ensure that both math.h and fp.h are not #included
+ Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
+ Added "packswap" transformation, which changes the endianness of
+ packed-pixel bytes (Kevin Bracey)
+ Added "strip_alpha" transformation, which removes the alpha channel of
+ input images without using it (not necessarily a good idea)
+ Added "swap_alpha" transformation, which puts the alpha channel in front
+ of the color bytes instead of after
+ Removed all implicit variable tests which assume NULL == 0 (I think)
+ Changed several variables to "png_size_t" to show 16/32-bit limitations
+ Added new pCAL chunk read/write support
+ Added experimental filter selection weighting (Greg Roelofs)
+ Removed old png_set_rgbx() and png_set_xrgb() functions that have been
+ obsolete for about 2 years now (use png_set_filler() instead)
+ Added macros to read 16- and 32-bit ints directly from buffer, to be
+ used only on those systems that support it (namely PowerPC and 680x0)
+ With some testing, this may become the default for MACOS/PPC systems.
+ Only calculate CRC on data if we are going to use it
+ Added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
+ Added macros for simple libpng debugging output selectable at compile time
+ Removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
+ More description of info_struct in libpng.txt and png.h
+ More instructions in example.c
+ More chunk types tested in pngtest.c
+ Renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
+ png_set_<chunk>. We now have corresponding png_get_<chunk>
+ functions in pngget.c to get information in info_ptr. This isolates
+ the application from the internal organization of png_info_struct
+ (good for shared library implementations).
+
+Version 0.96 [May, 1997]
+ Fixed serious bug with < 8bpp images introduced in 0.95
+ Fixed 256-color transparency bug (Greg Roelofs)
+ Fixed up documentation (Greg Roelofs, Laszlo Nyul)
+ Fixed "error" in pngconf.h for Linux setjmp() behaviour
+ Fixed DOS medium model support (Tim Wegner)
+ Fixed png_check_keyword() for case with error in static string text
+ Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
+ Added typecasts to quiet compiler errors
+ Added more debugging info
+
+Version 0.97 [January, 1998]
+ Removed PNG_USE_OWN_CRC capability
+ Relocated png_set_crc_action from pngrutil.c to pngrtran.c
+ Fixed typecasts of "new_key", etc. (Andreas Dilger)
+ Added RFC 1152 [sic] date support
+ Fixed bug in gamma handling of 4-bit grayscale
+ Added 2-bit grayscale gamma handling (Glenn R-P)
+ Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
+ Minor corrections in libpng.txt
+ Added simple sRGB support (Glenn R-P)
+ Easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
+ all configurable options can be selected from command-line instead
+ of having to edit pngconf.h (Glenn R-P)
+ Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
+ Added more conditions for png_do_background, to avoid changing
+ black pixels to background when a background is supplied and
+ no pixels are transparent
+ Repaired PNG_NO_STDIO behaviour
+ Tested NODIV support and made it default behaviour (Greg Roelofs)
+ Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
+ Regularized version numbering scheme and bumped shared-library major
+ version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs)
+
+Version 0.98 [January, 1998]
+ Cleaned up some typos in libpng.txt and in code documentation
+ Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
+ Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
+ Changed recommendation about file_gamma for PC images to .51 from .45,
+ in example.c and libpng.txt, added comments to distinguish between
+ screen_gamma, viewing_gamma, and display_gamma.
+ Changed all references to RFC1152 to read RFC1123 and changed the
+ PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
+ Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
+ Changed srgb_intent from png_byte to int to avoid compiler bugs
+
+Version 0.99 [January 30, 1998]
+ Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
+ Fixed a longstanding "packswap" bug in pngtrans.c
+ Fixed some inconsistencies in pngconf.h that prevented compiling with
+ PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
+ Fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
+ Changed recommendation about file_gamma for PC images to .50 from .51 in
+ example.c and libpng.txt, and changed file_gamma for sRGB images to .45
+ Added a number of functions to access information from the png structure
+ png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
+ Added TARGET_MACOS similar to zlib-1.0.8
+ Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
+ Added type casting to all png_malloc() function calls
+
+Version 0.99a [January 31, 1998]
+ Added type casts and parentheses to all returns that return a value.(Tim W.)
+
+Version 0.99b [February 4, 1998]
+ Added type cast png_uint_32 on malloc function calls where needed.
+ Changed type of num_hist from png_uint_32 to int (same as num_palette).
+ Added checks for rowbytes overflow, in case png_size_t is less than 32 bits.
+ Renamed makefile.elf to makefile.lnx.
+
+Version 0.99c [February 7, 1998]
+ More type casting. Removed erroneous overflow test in pngmem.c.
+ Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.
+ Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5.
+
+Version 0.99d [February 11, 1998]
+ Renamed "far_to_near()" "png_far_to_near()"
+ Revised libpng.3
+ Version 99c "buffered" operations didn't work as intended. Replaced them
+ with png_memcpy_check() and png_memset_check().
+ Added many "if (png_ptr == NULL) return" to quell compiler warnings about
+ unused png_ptr, mostly in pngget.c and pngset.c.
+ Check for overlength tRNS chunk present when indexed-color PLTE is read.
+ Cleaned up spelling errors in libpng.3/libpng.txt
+ Corrected a problem with png_get_tRNS() which returned undefined trans array
+
+Version 0.99e [February 28, 1998]
+ Corrected png_get_tRNS() again.
+ Add parentheses for easier reading of pngget.c, fixed "||" should be "&&".
+ Touched up example.c to make more of it compileable, although the entire
+ file still can't be compiled (Willem van Schaik)
+ Fixed a bug in png_do_shift() (Bryan Tsai)
+ Added a space in png.h prototype for png_write_chunk_start()
+ Replaced pngtest.png with one created with zlib 1.1.1
+ Changed pngtest to report PASS even when file size is different (Jean-loup G.)
+ Corrected some logic errors in png_do_invert_alpha() (Chris Patterson)
+
+Version 0.99f [March 5, 1998]
+ Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey)
+ Moved makefiles into a "scripts" directory, and added INSTALL instruction file
+ Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok)
+ Added pointers to "note on libpng versions" in makefile.lnx and README
+ Added row callback feature when reading and writing nonprogressive rows
+ and added a test of this feature in pngtest.c
+ Added user transform callbacks, with test of the feature in pngtest.c
+
+Version 0.99g [March 6, 1998, morning]
+ Minor changes to pngtest.c to suppress compiler warnings.
+ Removed "beta" language from documentation.
+
+Version 0.99h [March 6, 1998, evening]
+ Minor changes to previous minor changes to pngtest.c
+ Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED
+ and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro
+ Added user transform capability
+
+Version 1.00 [March 7, 1998]
+ Changed several typedefs in pngrutil.c
+ Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)
+ Replaced "while(1)" with "for(;;)"
+ Added PNGARG() to prototypes in pngtest.c and removed some prototypes
+ Updated some of the makefiles (Tom Lane)
+ Changed some typedefs (s_start, etc.) in pngrutil.c
+ Fixed dimensions of "short_months" array in pngwrite.c
+ Replaced ansi2knr.c with the one from jpeg-v6
+
+Version 1.0.0 [March 8, 1998]
+ Changed name from 1.00 to 1.0.0 (Adam Costello)
+ Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)
+
+Version 1.0.0a [March 9, 1998]
+ Fixed three bugs in pngrtran.c to make gamma+background handling consistent
+ (Greg Roelofs)
+ Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz
+ for major, minor, and bugfix releases. This is 10001. (Adam Costello,
+ Tom Lane)
+ Make months range from 1-12 in png_convert_to_rfc1123
+
+Version 1.0.0b [March 13, 1998]
+ Quieted compiler complaints about two empty "for" loops in pngrutil.c
+ Minor changes to makefile.s2x
+ Removed #ifdef/#endif around a png_free() in pngread.c
+
+Version 1.0.1 [March 14, 1998]
+ Changed makefile.s2x to reduce security risk of using a relative pathname
+ Fixed some typos in the documentation (Greg).
+ Fixed a problem with value of "channels" returned by png_read_update_info()
+
+Version 1.0.1a [April 21, 1998]
+ Optimized Paeth calculations by replacing abs() function calls with intrinsics
+ plus other loop optimizations. Improves avg decoding speed by about 20%.
+ Commented out i386istic "align" compiler flags in makefile.lnx.
+ Reduced the default warning level in some makefiles, to make them consistent.
+ Removed references to IJG and JPEG in the ansi2knr.c copyright statement.
+ Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation.
+ Added grayscale and 16-bit capability to png_do_read_filler().
+ Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes
+ too large when writing an image with bit_depth < 8 (Bob Dellaca).
+ Corrected some bugs in the experimental weighted filtering heuristics.
+ Moved a misplaced pngrutil code block that truncates tRNS if it has more
+ than num_palette entries -- test was done before num_palette was defined.
+ Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
+ Changed compiler flags in makefile.wat for better optimization
+ (Pawel Mrochen).
+
+Version 1.0.1b [May 2, 1998]
+ Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
+ Relocated the png_composite macros from pngrtran.c to png.h (Greg).
+ Added makefile.sco (contributed by Mike Hopkirk).
+ Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
+ Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
+ More work on the Paeth-filtering, achieving imperceptible speedup
+ (A Kleinert).
+ More work on loop optimization which may help when compiled with C++
+ compilers.
+ Added warnings when people try to use transforms they've defined out.
+ Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
+ Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
+
+Version 1.0.1c [May 11, 1998]
+ Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
+ filler bytes should have been 0xff instead of 0xf.
+ Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
+ Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
+ out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
+ Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED,
+ for consistency, in pngconf.h
+ Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier
+ to remove unwanted capabilities via the compile line
+ Made some corrections to grammar (which, it's) in documentation (Greg).
+ Corrected example.c, use of row_pointers in png_write_image().
+
+Version 1.0.1d [May 24, 1998]
+ Corrected several statements that used side effects illegally in pngrutil.c
+ and pngtrans.c, that were introduced in version 1.0.1b
+ Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
+ More corrections to example.c, use of row_pointers in png_write_image()
+ and png_read_rows().
+ Added pngdll.mak and pngdef.pas to scripts directory, contributed by
+ Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
+ Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
+ Changed several loops from count-down to count-up, for consistency.
+
+Version 1.0.1e [June 6, 1998]
+ Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
+ added warnings when people try to set png_read_fn and png_write_fn in
+ the same structure.
+ Added a test such that png_do_gamma will be done when num_trans==0
+ for truecolor images that have defined a background. This corrects an
+ error that was introduced in libpng-0.90 that can cause gamma processing
+ to be skipped.
+ Added tests in png.h to include "trans" and "trans_values" in structures
+ when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined.
+ Add png_free(png_ptr->time_buffer) in png_destroy_read_struct()
+ Moved png_convert_to_rfc_1123() from pngwrite.c to png.c
+ Added capability for user-provided malloc_fn() and free_fn() functions,
+ and revised pngtest.c to demonstrate their use, replacing the
+ PNGTEST_DEBUG_MEM feature.
+ Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
+
+Version 1.0.2 [June 14, 1998]
+ Fixed two bugs in makefile.bor .
+
+Version 1.0.2a [December 30, 1998]
+ Replaced and extended code that was removed from png_set_filler() in 1.0.1a.
+ Fixed a bug in png_do_filler() that made it fail to write filler bytes in
+ the left-most pixel of each row (Kevin Bracey).
+ Changed "static pngcharp tIME_string" to "static char tIME_string[30]"
+ in pngtest.c (Duncan Simpson).
+ Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk
+ even when no tIME chunk was present in the source file.
+ Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit.
+ Fixed a problem in png_read_push_finish_row(), which would not skip some
+ passes that it should skip, for images that are less than 3 pixels high.
+ Interchanged the order of calls to png_do_swap() and png_do_shift()
+ in pngwtran.c (John Cromer).
+ Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h .
+ Changed "bad adaptive filter type" from error to warning in pngrutil.c .
+ Fixed a documentation error about default filtering with 8-bit indexed-color.
+ Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO
+ (L. Peter Deutsch).
+ Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.
+ Added png_get_copyright() and png_get_header_version() functions.
+ Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c
+ Added information about debugging in libpng.txt and libpng.3 .
+ Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and
+ makefile.sco.
+ Removed lines after Dynamic Dependencies" in makefile.aco .
+ Revised makefile.dec to make a shared library (Jeremie Petit).
+ Removed trailing blanks from all files.
+
+Version 1.0.2a [January 6, 1999]
+ Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h
+ Added "if" tests to silence complaints about unused png_ptr in png.h and png.c
+ Changed "check_if_png" function in example.c to return true (nonzero) if PNG.
+ Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()
+ which is obsolete.
+
+Version 1.0.3 [January 14, 1999]
+ Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)
+ Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.
+
+Version 1.0.3a [August 12, 1999]
+ Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
+ if an attempt is made to read an interlaced image when it's not supported.
+ Added check if png_ptr->trans is defined before freeing it in pngread.c
+ Modified the Y2K statement to include versions back to version 0.71
+ Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c
+ Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments)
+ Replaced leading blanks with tab characters in makefile.hux
+ Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents.
+ Changed (float)red and (float)green to (double)red, (double)green
+ in png_set_rgb_to_gray() to avoid "promotion" problems in AIX.
+ Fixed a bug in pngconf.h that omitted <stdio.h> when PNG_DEBUG==0 (K Bracey).
+ Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt).
+ Updated documentation to refer to the PNG-1.2 specification.
+ Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c
+ in makefile.knr, INSTALL, and README (L. Peter Deutsch)
+ Fixed bugs in calculation of the length of rowbytes when adding alpha
+ channels to 16-bit images, in pngrtran.c (Chris Nokleberg)
+ Added function png_set_user_transform_info() to store user_transform_ptr,
+ user_depth, and user_channels into the png_struct, and a function
+ png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg)
+ Added function png_set_empty_plte_permitted() to make libpng useable
+ in MNG applications.
+ Corrected the typedef for png_free_ptr in png.h (Jesse Jones).
+ Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
+ consistent with PNG-1.2, and allow variance of 500 before complaining.
+ Added assembler code contributed by Intel in file pngvcrd.c and modified
+ makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation,
+ Gilles Vollant)
+ Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
+ Added some aliases for png_set_expand() in pngrtran.c, namely
+ png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
+ (Greg Roelofs, in "PNG: The Definitive Guide").
+ Added makefile.beo for BEOS on X86, contributed by Sander Stok.
+
+Version 1.0.3b [August 26, 1999]
+ Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
+ Changed leading blanks to tabs in all makefiles.
+ Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
+ Made alternate versions of png_set_expand() in pngrtran.c, namely
+ png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
+ (Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases.
+ Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
+ Revised calculation of num_blocks in pngmem.c to avoid a potentially
+ negative shift distance, whose results are undefined in the C language.
+ Added a check in pngset.c to prevent writing multiple tIME chunks.
+ Added a check in pngwrite.c to detect invalid small window_bits sizes.
+
+Version 1.0.3d [September 4, 1999]
+ Fixed type casting of igamma in pngrutil.c
+ Added new png_expand functions to scripts/pngdef.pas and pngos2.def
+ Added a demo read_user_transform_fn that examines the row filters in pngtest.c
+
+Version 1.0.4 [September 24, 1999]
+ Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
+ Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
+ Made several minor corrections to pngtest.c
+ Renamed the makefiles with longer but more user friendly extensions.
+ Copied the PNG copyright and license to a separate LICENSE file.
+ Revised documentation, png.h, and example.c to remove reference to
+ "viewing_gamma" which no longer appears in the PNG specification.
+ Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
+ Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
+ Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
+ assembler code) and makefile.vcwin32 (doesn't).
+ Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
+ Added a copy of pngnow.png to the distribution.
+
+Version 1.0.4a [September 25, 1999]
+ Increase max_pixel_depth in pngrutil.c if a user transform needs it.
+ Changed several division operations to right-shifts in pngvcrd.c
+
+Version 1.0.4b [September 30, 1999]
+ Added parentheses in line 3732 of pngvcrd.c
+ Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
+
+Version 1.0.4c [October 1, 1999]
+ Added a "png_check_version" function in png.c and pngtest.c that will generate
+ a helpful compiler error if an old png.h is found in the search path.
+ Changed type of png_user_transform_depth|channels from int to png_byte.
+
+Version 1.0.4d [October 6, 1999]
+ Changed 0.45 to 0.45455 in png_set_sRGB()
+ Removed unused PLTE entries from pngnow.png
+ Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.
+
+Version 1.0.4e [October 10, 1999]
+ Fixed sign error in pngvcrd.c (Greg Roelofs)
+ Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)
+
+Version 1.0.4f [October 15, 1999]
+ Surrounded example.c code with #if 0 .. #endif to prevent people from
+ inadvertently trying to compile it.
+ Changed png_get_header_version() from a function to a macro in png.h
+ Added type casting mostly in pngrtran.c and pngwtran.c
+ Removed some pointless "ptr = NULL" in pngmem.c
+ Added a "contrib" directory containing the source code from Greg's book.
+
+Version 1.0.5 [October 15, 1999]
+ Minor editing of the INSTALL and README files.
+
+Version 1.0.5a [October 23, 1999]
+ Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
+ Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
+ Further optimization and bugfix of pngvcrd.c
+ Revised pngset.c so that it does not allocate or free memory in the user's
+ text_ptr structure. Instead, it makes its own copy.
+ Created separate write_end_info_struct in pngtest.c for a more severe test.
+ Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
+
+Version 1.0.5b [November 23, 1999]
+ Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and
+ PNG_FLAG_WROTE_tIME from flags to mode.
+ Added png_write_info_before_PLTE() function.
+ Fixed some typecasting in contrib/gregbook/*.c
+ Updated scripts/makevms.com and added makevms.com to contrib/gregbook
+ and contrib/pngminus (Martin Zinser)
+
+Version 1.0.5c [November 26, 1999]
+ Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr.
+ Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
+ accommodate making DLL's: Moved usr_png_ver from global variable to function
+ png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and
+ eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays
+ into pngtypes.h. Eliminated use of global png_pass arrays. Declared the
+ png_CHNK and png_pass arrays to be "const". Made the global arrays
+ available to applications (although none are used in libpng itself) when
+ PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined.
+ Removed some extraneous "-I" from contrib/pngminus/makefile.std
+ Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.
+ Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3
+
+Version 1.0.5d [November 29, 1999]
+ Add type cast (png_const_charp) two places in png.c
+ Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
+ Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
+ to applications a macro "PNG_USE_LOCAL_ARRAYS".
+ comment out (with #ifdef) all the new declarations when
+ PNG_USE_GLOBAL_ARRAYS is defined.
+ Added PNG_EXPORT_VAR macro to accommodate making DLL's.
+
+Version 1.0.5e [November 30, 1999]
+ Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
+ structure; refactored the inflate/deflate support to make adding new chunks
+ with trailing compressed parts easier in the future, and added new functions
+ png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP,
+ png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond).
+ NOTE: Applications that write text chunks MUST define png_text->lang
+ before calling png_set_text(). It must be set to NULL if you want to
+ write tEXt or zTXt chunks. If you want your application to be able to
+ run with older versions of libpng, use
+
+ #ifdef PNG_iTXt_SUPPORTED
+ png_text[i].lang = NULL;
+ #endif
+
+ Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned
+ offsets (Eric S. Raymond).
+ Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into
+ PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED
+ macros, leaving the separate macros also available.
+ Removed comments on #endifs at the end of many short, non-nested #if-blocks.
+
+Version 1.0.5f [December 6, 1999]
+ Changed makefile.solaris to issue a warning about potential problems when
+ the ucb "ld" is in the path ahead of the ccs "ld".
+ Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.
+ Added sCAL chunk support (Eric S. Raymond).
+
+Version 1.0.5g [December 7, 1999]
+ Fixed "png_free_spallettes" typo in png.h
+ Added code to handle new chunks in pngpread.c
+ Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block
+ Added "translated_key" to png_text structure and png_write_iTXt().
+ Added code in pngwrite.c to work around a newly discovered zlib bug.
+
+Version 1.0.5h [December 10, 1999]
+ NOTE: regarding the note for version 1.0.5e, the following must also
+ be included in your code:
+ png_text[i].translated_key = NULL;
+ Unknown chunk handling is now supported.
+ Option to eliminate all floating point support was added. Some new
+ fixed-point functions such as png_set_gAMA_fixed() were added.
+ Expanded tabs and removed trailing blanks in source files.
+
+Version 1.0.5i [December 13, 1999]
+ Added some type casts to silence compiler warnings.
+ Renamed "png_free_spalette" to "png_free_spalettes" for consistency.
+ Removed leading blanks from a #define in pngvcrd.c
+ Added some parameters to the new png_set_keep_unknown_chunks() function.
+ Added a test for up->location != 0 in the first instance of writing
+ unknown chunks in pngwrite.c
+ Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to
+ prevent recursion.
+ Added png_free_hIST() function.
+ Various patches to fix bugs in the sCAL and integer cHRM processing,
+ and to add some convenience macros for use with sCAL.
+
+Version 1.0.5j [December 21, 1999]
+ Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
+ around buggy compilers.
+ Added new type "png_fixed_point" for integers that hold float*100000 values
+ Restored backward compatibility of tEXt/zTXt chunk processing:
+ Restored the first four members of png_text to the same order as v.1.0.5d.
+ Added members "lang_key" and "itxt_length" to png_text struct. Set
+ text_length=0 when "text" contains iTXt data. Use the "compression"
+ member to distinguish among tEXt/zTXt/iTXt types. Added
+ PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros.
+ The "Note" above, about backward incompatibility of libpng-1.0.5e, no
+ longer applies.
+ Fixed png_read|write_iTXt() to read|write parameters in the right order,
+ and to write the iTXt chunk after IDAT if it appears in the end_ptr.
+ Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
+ Reversed the order of trying to write floating-point and fixed-point gAMA.
+
+Version 1.0.5k [December 27, 1999]
+ Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
+ Added png_handle_as_unknown() function (Glenn)
+ Added png_free_chunk_list() function and chunk_list and num_chunk_list members
+ of png_ptr.
+ Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE.
+ Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings
+ about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored)
+ Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
+ Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
+ Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
+
+Version 1.0.5l [January 1, 2000]
+ Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
+ for setting a callback function to handle unknown chunks and for
+ retrieving the associated user pointer (Glenn).
+
+Version 1.0.5m [January 7, 2000]
+ Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
+
+Version 1.0.5n [January 9, 2000]
+ Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
+ own memory for info_ptr->palette. This makes it safe for the calling
+ application to free its copy of the palette any time after it calls
+ png_set_PLTE().
+
+Version 1.0.5o [January 20, 2000]
+ Cosmetic changes only (removed some trailing blanks and TABs)
+
+Version 1.0.5p [January 31, 2000]
+ Renamed pngdll.mak to makefile.bd32
+ Cosmetic changes in pngtest.c
+
+Version 1.0.5q [February 5, 2000]
+ Relocated the makefile.solaris warning about PATH problems.
+ Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
+ Revised makefile.gcmmx
+ Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
+
+Version 1.0.5r [February 7, 2000]
+ Removed superfluous prototype for png_get_itxt from png.h
+ Fixed a bug in pngrtran.c that improperly expanded the background color.
+ Return *num_text=0 from png_get_text() when appropriate, and fix documentation
+ of png_get_text() in libpng.txt/libpng.3.
+
+Version 1.0.5s [February 18, 2000]
+ Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
+ new error handler that's planned for the next libpng release, and changed
+ example.c, pngtest.c, and contrib programs to use this macro.
+ Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
+ Fixed a bug in png_read_png() that caused it to fail to expand some images
+ that it should have expanded.
+ Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
+ in pngget.c
+ Changed the allocation of palette, history, and trans arrays back to
+ the version 1.0.5 method (linking instead of copying) which restores
+ backward compatibility with version 1.0.5. Added some remarks about
+ that in example.c. Added "free_me" member to info_ptr and png_ptr
+ and added png_free_data() function.
+ Updated makefile.linux and makefile.gccmmx to make directories conditionally.
+ Made cosmetic changes to pngasmrd.h
+ Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
+ Modified png_read_png() to allocate info_ptr->row_pointers only if it
+ hasn't already been allocated.
+
+Version 1.0.5t [March 4, 2000]
+ Changed png_jmp_env() migration aiding macro to png_jmpbuf().
+ Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c
+ Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when
+ PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b
+ Files in contrib/gregbook were revised to use png_jmpbuf() and to select
+ a 24-bit visual if one is available, and to allow abbreviated options.
+ Files in contrib/pngminus were revised to use the png_jmpbuf() macro.
+ Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s
+
+Version 1.0.5u [March 5, 2000]
+ Simplified the code that detects old png.h in png.c and pngtest.c
+ Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)
+ Increased precision of rgb_to_gray calculations from 8 to 15 bits and
+ added png_set_rgb_to_gray_fixed() function.
+ Added makefile.bc32 (32-bit Borland C++, C mode)
+
+Version 1.0.5v [March 11, 2000]
+ Added some parentheses to the png_jmpbuf macro definition.
+ Updated references to the zlib home page, which has moved to freesoftware.com.
+ Corrected bugs in documentation regarding png_read_row() and png_write_row().
+ Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt.
+ Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
+ revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
+
+Version 1.0.6 [March 20, 2000]
+ Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c
+ Added makefile.sggcc (SGI IRIX with gcc)
+
+Version 1.0.6d [April 7, 2000]
+ Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
+ Added data_length parameter to png_decompress_chunk() function
+ Revised documentation to remove reference to abandoned png_free_chnk functions
+ Fixed an error in png_rgb_to_gray_fixed()
+ Revised example.c, usage of png_destroy_write_struct().
+ Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
+ Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c
+ Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
+
+Version 1.0.6e [April 9, 2000]
+ Added png_data_freer() function.
+ In the code that checks for over-length tRNS chunks, added check of
+ info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
+ Minor revisions of libpng.txt/libpng.3.
+ Check for existing data and free it if the free_me flag is set, in png_set_*()
+ and png_handle_*().
+ Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED
+ is defined.
+ Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c
+ and mentioned the purposes of the two macros in libpng.txt/libpng.3.
+
+Version 1.0.6f [April 14, 2000]
+ Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.
+ Add checks in png_set_text() for NULL members of the input text structure.
+ Revised libpng.txt/libpng.3.
+ Removed superfluous prototype for png_set_iTXt from png.h
+ Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
+ Changed several png_errors about malformed ancillary chunks to png_warnings.
+
+Version 1.0.6g [April 24, 2000]
+ Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
+ Relocated paragraph about png_set_background() in libpng.3/libpng.txt
+ and other revisions (Matthias Benckmann)
+ Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
+ png_ptr members to restore binary compatibility with libpng-1.0.5
+ (breaks compatibility with libpng-1.0.6).
+
+Version 1.0.6h [April 24, 2000]
+ Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds
+ libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)
+ This is a temporary change for test purposes.
+
+Version 1.0.6i [May 2, 2000]
+ Rearranged some members at the end of png_info and png_struct, to put
+ unknown_chunks_num and free_me within the original size of the png_structs
+ and free_me, png_read_user_fn, and png_free_fn within the original png_info,
+ because some old applications allocate the structs directly instead of
+ using png_create_*().
+ Added documentation of user memory functions in libpng.txt/libpng.3
+ Modified png_read_png so that it will use user_allocated row_pointers
+ if present, unless free_me directs that it be freed, and added description
+ of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.
+ Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version
+ 1.00) members of png_struct and png_info, to regain binary compatibility
+ when you define this macro. Capabilities lost in this event
+ are user transforms (new in version 1.0.0),the user transform pointer
+ (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,
+ the high-level interface, and unknown chunks support (all new in 1.0.6).
+ This was necessary because of old applications that allocate the structs
+ directly as authors were instructed to do in libpng-0.88 and earlier,
+ instead of using png_create_*().
+ Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which
+ can be used to detect codes that directly allocate the structs, and
+ code to check these modes in png_read_init() and png_write_init() and
+ generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED
+ was not defined.
+ Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
+
+Version 1.0.6j [May 3, 2000]
+ Overloaded png_read_init() and png_write_init() with macros that convert
+ calls to png_read_init_2() or png_write_init_2() that check the version
+ and structure sizes.
+
+Version 1.0.7beta11 [May 7, 2000]
+ Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
+ which are no longer used.
+ Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
+ defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED
+ is defined.
+ Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory
+ overrun when old applications fill the info_ptr->text structure directly.
+ Added PNGAPI macro, and added it to the definitions of all exported functions.
+ Relocated version macro definitions ahead of the includes of zlib.h and
+ pngconf.h in png.h.
+
+Version 1.0.7beta12 [May 12, 2000]
+ Revised pngset.c to avoid a problem with expanding the png_debug macro.
+ Deleted some extraneous defines from pngconf.h
+ Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
+ Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
+ Added png_access_version_number() function.
+ Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
+ Expanded libpng.3/libpng.txt information about png_data_freer().
+
+Version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
+ Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
+ warnings instead of errors, as pngrutil.c does.
+ Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
+ will actually write IDATs.
+ Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
+ Make png_free_data() ignore its final parameter except when freeing data
+ that can have multiple instances (text, sPLT, unknowns).
+ Fixed a new bug in png_set_rows().
+ Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
+ Added png_set_invalid() function.
+ Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
+
+Version 1.0.7beta15 [May 30, 2000]
+ Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
+ fewer error messages.
+ Rearranged checks for Z_OK to check the most likely path first in pngpread.c
+ and pngwutil.c.
+ Added checks in pngtest.c for png_create_*() returning NULL, and mentioned
+ in libpng.txt/libpng.3 the need for applications to check this.
+ Changed names of png_default_*() functions in pngtest to pngtest_*().
+ Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32.
+ Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c
+ Set each pointer to NULL after freeing it in png_free_data().
+ Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
+ macro that conflicts with libpng's png_color_16.index. (Dimitri
+ Papadapoulos)
+ Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).
+
+Version 1.0.7beta16 [June 4, 2000]
+ Revised the workaround of AIX string.h "index" bug.
+ Added a check for overlength PLTE chunk in pngrutil.c.
+ Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
+ indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
+ Added a warning in png_decompress_chunk() when it runs out of data, e.g.
+ when it tries to read an erroneous PhotoShop iCCP chunk.
+ Added PNG_USE_DLL macro.
+ Revised the copyright/disclaimer/license notice.
+ Added contrib/msvctest directory
+
+Version 1.0.7rc1 [June 9, 2000]
+ Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
+ Added contrib/visupng directory (Willem van Schaik)
+
+Version 1.0.7beta18 [June 23, 2000]
+ Revised PNGAPI definition, and pngvcrd.c to work with __GCC__
+ and do not redefine PNGAPI if it is passed in via a compiler directive.
+ Revised visupng/PngFile.c to remove returns from within the Try block.
+ Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
+ Updated contrib/visupng/cexcept.h to version 1.0.0.
+ Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
+
+Version 1.0.7rc2 [June 28, 2000]
+ Updated license to include disclaimers required by UCITA.
+ Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.
+
+Version 1.0.7 [July 1, 2000]
+ Revised the definition of "trans_values" in libpng.3/libpng.txt
+
+Version 1.0.8beta1 [July 8, 2000]
+ Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.
+ Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and
+ pngwutil.c.
+ Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h.
+ Removed unused "#include <assert.h>" from png.c
+ Added WindowsCE support.
+ Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment.
+
+Version 1.0.8beta2 [July 10, 2000]
+ Added project files to the wince directory and made further revisions
+ of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE.
+
+Version 1.0.8beta3 [July 11, 2000]
+ Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS()
+ for indexed-color input files to avoid potential double-freeing trans array
+ under some unusual conditions; problem was introduced in version 1.0.6f.
+ Further revisions to pngtest.c and files in the wince subdirectory.
+
+Version 1.0.8beta4 [July 14, 2000]
+ Added the files pngbar.png and pngbar.jpg to the distribution.
+ Added makefile.cygwin, and cygwin support in pngconf.h
+ Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory)
+
+Version 1.0.8rc1 [July 16, 2000]
+ Revised png_debug() macros and statements to eliminate compiler warnings.
+
+Version 1.0.8 [July 24, 2000]
+ Added png_flush() in pngwrite.c, after png_write_IEND().
+ Updated makefile.hpux to build a shared library.
+
+Version 1.0.9beta1 [November 10, 2000]
+ Fixed typo in scripts/makefile.hpux
+ Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
+ Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
+ Changed "cdrom.com" in documentation to "libpng.org"
+ Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).
+ Changed type of "params" from voidp to png_voidp in png_read|write_png().
+ Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h.
+ Revised the 3 instances of WRITEFILE in pngtest.c.
+ Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory.
+ Updated png.rc in dll/msvc project
+ Revised makefile.dec to define and use LIBPATH and INCPATH
+ Increased size of global png_libpng_ver[] array from 12 to 18 chars.
+ Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const.
+ Removed duplicate png_crc_finish() from png_handle_bKGD() function.
+ Added a warning when application calls png_read_update_info() multiple times.
+ Revised makefile.cygwin
+ Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.
+ Replaced png_set_empty_plte_permitted() with png_permit_mng_features().
+
+Version 1.0.9beta2 [November 19, 2000]
+ Renamed the "dll" subdirectory "projects".
+ Added borland project files to "projects" subdirectory.
+ Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.
+ Add error message in png_set_compression_buffer_size() when malloc fails.
+
+Version 1.0.9beta3 [November 23, 2000]
+ Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
+ Removed the png_flush() in pngwrite.c that crashes some applications
+ that don't set png_output_flush_fn.
+ Added makefile.macosx and makefile.aix to scripts directory.
+
+Version 1.0.9beta4 [December 1, 2000]
+ Change png_chunk_warning to png_warning in png_check_keyword().
+ Increased the first part of msg buffer from 16 to 18 in png_chunk_error().
+
+Version 1.0.9beta5 [December 15, 2000]
+ Added support for filter method 64 (for PNG datastreams embedded in MNG).
+
+Version 1.0.9beta6 [December 18, 2000]
+ Revised png_set_filter() to accept filter method 64 when appropriate.
+ Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to
+ help prevent applications from using MNG features in PNG datastreams.
+ Added png_permit_mng_features() function.
+ Revised libpng.3/libpng.txt. Changed "filter type" to "filter method".
+
+Version 1.0.9rc1 [December 23, 2000]
+ Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c
+ Fixed error handling of unknown compression type in png_decompress_chunk().
+ In pngconf.h, define __cdecl when _MSC_VER is defined.
+
+Version 1.0.9beta7 [December 28, 2000]
+ Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.
+ Revised memory management in png_set_hIST and png_handle_hIST in a backward
+ compatible manner. PLTE and tRNS were revised similarly.
+ Revised the iCCP chunk reader to ignore trailing garbage.
+
+Version 1.0.9beta8 [January 12, 2001]
+ Moved pngasmrd.h into pngconf.h.
+ Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
+
+Version 1.0.9beta9 [January 15, 2001]
+ Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
+ wince and msvc project module definition files.
+ Minor revision of makefile.cygwin.
+ Fixed bug with progressive reading of narrow interlaced images in pngpread.c
+
+Version 1.0.9beta10 [January 16, 2001]
+ Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.
+ Fixed "png_mmx_supported" typo in project definition files.
+
+Version 1.0.9beta11 [January 19, 2001]
+ Updated makefile.sgi to make shared library.
+ Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED
+ by default, for the benefit of DLL forward compatibility. These will
+ be re-enabled in version 1.2.0.
+
+Version 1.0.9rc2 [January 22, 2001]
+ Revised cygwin support.
+
+Version 1.0.9 [January 31, 2001]
+ Added check of cygwin's ALL_STATIC in pngconf.h
+ Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.
+
+Version 1.0.10beta1 [March 14, 2001]
+ Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc.
+ Reformatted libpng.3 to eliminate bad line breaks.
+ Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c
+ Added prototype for png_mmx_support() near the top of pnggccrd.c
+ Moved some error checking from png_handle_IHDR to png_set_IHDR.
+ Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros.
+ Revised png_mmx_support() function in pnggccrd.c
+ Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c
+ Fixed memory leak in contrib/visupng/PngFile.c
+ Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version)
+ Added warnings when retrieving or setting gamma=0.
+ Increased the first part of msg buffer from 16 to 18 in png_chunk_warning().
+
+Version 1.0.10rc1 [March 23, 2001]
+ Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy,
+ and png_strlen.
+ Revised png_mmx_supported() function in pnggccrd.c to return proper value.
+ Fixed bug in progressive reading (pngpread.c) with small images (height < 8).
+
+Version 1.0.10 [March 30, 2001]
+ Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin
+ Added beos project files (Chris Herborth)
+
+Version 1.0.11beta1 [April 3, 2001]
+ Added type casts on several png_malloc() calls (Dimitri Papadapoulos).
+ Removed a no-longer needed AIX work-around from pngconf.h
+ Changed several "//" single-line comments to C-style in pnggccrd.c
+
+Version 1.0.11beta2 [April 11, 2001]
+ Removed PNGAPI from several functions whose prototypes did not have PNGAPI.
+ Updated scripts/pngos2.def
+
+Version 1.0.11beta3 [April 14, 2001]
+ Added checking the results of many instances of png_malloc() for NULL
+
+Version 1.0.11beta4 [April 20, 2001]
+ Undid the changes from version 1.0.11beta3. Added a check for NULL return
+ from user's malloc_fn().
+ Removed some useless type casts of the NULL pointer.
+ Added makefile.netbsd
+
+Version 1.0.11 [April 27, 2001]
+ Revised makefile.netbsd
+
+Version 1.0.12beta1 [May 14, 2001]
+ Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot)
+ Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h
+ Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings.
+ Eliminated the png_error about apps using png_read|write_init(). Instead,
+ libpng will reallocate the png_struct and info_struct if they are too small.
+ This retains future binary compatibility for old applications written for
+ libpng-0.88 and earlier.
+
+Version 1.2.0beta1 [May 6, 2001]
+ Bumped DLLNUM to 2.
+ Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED
+ by default.
+ Added runtime selection of MMX features.
+ Added png_set_strip_error_numbers function and related macros.
+
+Version 1.2.0beta2 [May 7, 2001]
+ Finished merging 1.2.0beta1 with version 1.0.11
+ Added a check for attempts to read or write PLTE in grayscale PNG datastreams.
+
+Version 1.2.0beta3 [May 17, 2001]
+ Enabled user memory function by default.
+ Modified png_create_struct so it passes user mem_ptr to user memory allocator.
+ Increased png_mng_features flag from png_byte to png_uint_32.
+ Bumped shared-library (so-number) and dll-number to 3.
+
+Version 1.2.0beta4 [June 23, 2001]
+ Check for missing profile length field in iCCP chunk and free chunk_data
+ in case of truncated iCCP chunk.
+ Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc
+ Bumped dll-number from 2 to 3 in makefile.cygwin
+ Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly
+ if user attempts to run it on an 8-bit display.
+ Updated contrib/gregbook
+ Use png_malloc instead of png_zalloc to allocate palette in pngset.c
+ Updated makefile.ibmc
+ Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes
+ of png_write_oFFS width and height from png_uint_32 to png_int_32.
+ Updated example.c
+ Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c
+
+Version 1.2.0beta5 [August 8, 2001]
+ Revised contrib/gregbook
+ Revised makefile.gcmmx
+ Revised pnggccrd.c to conditionally compile some thread-unsafe code only
+ when PNG_THREAD_UNSAFE_OK is defined.
+ Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with
+ value exceeding 2^bit_depth-1
+ Revised makefile.sgi and makefile.sggcc
+ Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c
+ Removed restriction that do_invert_mono only operate on 1-bit opaque files
+
+Version 1.2.0 [September 1, 2001]
+ Changed a png_warning() to png_debug() in pnggccrd.c
+ Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC().
+
+Version 1.2.1beta1 [October 19, 2001]
+ Revised makefile.std in contrib/pngminus
+ Include background_1 in png_struct regardless of gamma support.
+ Revised makefile.netbsd and makefile.macosx, added makefile.darwin.
+ Revised example.c to provide more details about using row_callback().
+
+Version 1.2.1beta2 [October 25, 2001]
+ Added type cast to each NULL appearing in a function call, except for
+ WINCE functions.
+ Added makefile.so9.
+
+Version 1.2.1beta3 [October 27, 2001]
+ Removed type casts from all NULLs.
+ Simplified png_create_struct_2().
+
+Version 1.2.1beta4 [November 7, 2001]
+ Revised png_create_info_struct() and png_creat_struct_2().
+ Added error message if png_write_info() was omitted.
+ Type cast NULLs appearing in function calls when _NO_PROTO or
+ PNG_TYPECAST_NULL is defined.
+
+Version 1.2.1rc1 [November 24, 2001]
+ Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL
+ is defined.
+ Changed typecast of "size" argument to png_size_t in pngmem.c calls to
+ the user malloc_fn, to agree with the prototype in png.h
+ Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev)
+ Updated makefile.sgi to recognize LIBPATH and INCPATH.
+ Updated various makefiles so "make clean" does not remove previous major
+ version of the shared library.
+
+Version 1.2.1rc2 [December 4, 2001]
+ Always allocate 256-entry internal palette, hist, and trans arrays, to
+ avoid out-of-bounds memory reference caused by invalid PNG datastreams.
+ Added a check for prefix_length > data_length in iCCP chunk handler.
+
+Version 1.2.1 [December 7, 2001]
+ None.
+
+Version 1.2.2beta1 [February 22, 2002]
+ Fixed a bug with reading the length of iCCP profiles (Larry Reeves).
+ Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate
+ libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h
+ Revised makefile.darwin to remove "-undefined suppress" option.
+ Added checks for gamma and chromaticity values over 21474.83, which exceed
+ the limit for PNG unsigned 32-bit integers when encoded.
+ Revised calls to png_create_read_struct() and png_create_write_struct()
+ for simpler debugging.
+ Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK)
+
+Version 1.2.2beta2 [February 23, 2002]
+ Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths.
+ Check for invalid image dimensions in png_get_IHDR.
+ Added missing "fi;" in the install target of the SGI makefiles.
+ Added install-static to all makefiles that make shared libraries.
+ Always do gamma compensation when image is partially transparent.
+
+Version 1.2.2beta3 [March 7, 2002]
+ Compute background.gray and background_1.gray even when color_type is RGB
+ in case image gets reduced to gray later.
+ Modified shared-library makefiles to install pkgconfig/libpngNN.pc.
+ Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown
+ Removed unused png_write_destroy_info prototype from png.h
+ Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case
+ Added install-shared target to all makefiles that make shared libraries.
+ Stopped a double free of palette, hist, and trans when not using free_me.
+ Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64.
+
+Version 1.2.2beta4 [March 8, 2002]
+ Compute background.gray and background_1.gray even when color_type is RGB
+ in case image gets reduced to gray later (Jason Summers).
+ Relocated a misplaced /bin/rm in the "install-shared" makefile targets
+ Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library.
+
+Version 1.2.2beta5 [March 26, 2002]
+ Added missing PNGAPI to several function definitions.
+ Check for invalid bit_depth or color_type in png_get_IHDR(), and
+ check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen).
+ Revised iTXt support to accept NULL for lang and lang_key.
+ Compute gamma for color components of background even when color_type is gray.
+ Changed "()" to "{}" in scripts/libpng.pc.in.
+ Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN
+ Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so
+
+Version 1.2.2beta6 [March 31, 2002]
+
+Version 1.0.13beta1 [March 31, 2002]
+ Prevent png_zalloc() from trying to memset memory that it failed to acquire.
+ Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate).
+ Ensure that the right function (user or default) is used to free the
+ png_struct after an error in png_create_read_struct_2().
+
+Version 1.2.2rc1 [April 7, 2002]
+
+Version 1.0.13rc1 [April 7, 2002]
+ Save the ebx register in pnggccrd.c (Sami Farin)
+ Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner).
+ Updated makefiles to put headers in include/libpng and remove old include/*.h.
+
+Version 1.2.2 [April 15, 2002]
+
+Version 1.0.13 [April 15, 2002]
+ Revised description of png_set_filter() in libpng.3/libpng.txt.
+ Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd
+
+Version 1.0.13patch01 [April 17, 2002]
+
+Version 1.2.2patch01 [April 17, 2002]
+ Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and
+ makefile.sggcc
+ Fixed VER -> PNGVER typo in makefile.macosx and added install-static to
+ install
+ Added install: target to makefile.32sunu and makefile.64sunu
+
+Version 1.0.13patch03 [April 18, 2002]
+
+Version 1.2.2patch03 [April 18, 2002]
+ Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng
+ subdirectory to libpngNN subdirectory without the full pathname.
+ Moved generation of libpng.pc from "install" to "all" in 15 makefiles.
+
+Version 1.2.3rc1 [April 28, 2002]
+ Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos).
+ Added $(DESTDIR) feature to 24 makefiles (Tim Mooney)
+ Fixed bug with $prefix, should be $(prefix) in makefile.hpux.
+ Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin
+ Added a link from libpngNN.pc to libpng.pc in 15 makefiles.
+ Added links from include/libpngNN/*.h to include/*.h in 24 makefiles.
+ Revised makefile.darwin to make relative links without full pathname.
+ Added setjmp() at the end of png_create_*_struct_2() in case user forgets
+ to put one in their application.
+ Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and
+ removed them from module definition files.
+
+Version 1.2.3rc2 [May 1, 2002]
+ Fixed bug in reporting number of channels in pngget.c and pngset.c,
+ that was introduced in version 1.2.2beta5.
+ Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(),
+ png_default_flush(), and png_push_fill_buffer() and included them in
+ module definition files.
+ Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles.
+
+Version 1.2.3rc3 [May 1, 2002]
+ Revised prototype for png_default_flush()
+ Remove old libpng.pc and libpngNN.pc before installing new ones.
+
+Version 1.2.3rc4 [May 2, 2002]
+ Typos in *.def files (png_default_read|write -> png_default_read|write_data)
+ In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc
+ Added libpng-config and libpngNN-config and modified makefiles to install
+ them.
+ Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles
+ Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp
+
+Version 1.2.3rc5 [May 11, 2002]
+ Changed "error" and "message" in prototypes to "error_message" and
+ "warning_message" to avoid namespace conflict.
+ Revised 15 makefiles to build libpng-config from libpng-config-*.in
+ Once more restored png_zalloc and png_zfree to regular nonexported form.
+ Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer
+ to nonexported form, but with PNGAPI, and removed them from module def
+ files.
+
+Version 1.2.3rc6 [May 14, 2002]
+ Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c
+ Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp.
+ Removed leftover libpng-config "sed" script from four makefiles.
+ Revised libpng-config creating script in 16 makefiles.
+
+Version 1.2.3 [May 22, 2002]
+ Revised libpng-config target in makefile.cygwin.
+ Removed description of png_set_mem_fn() from documentation.
+ Revised makefile.freebsd.
+ Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR).
+ Revised projects/msvc/README.txt
+ Changed -lpng to -lpngNN in LDFLAGS in several makefiles.
+
+Version 1.2.4beta1 [May 24, 2002]
+ Added libpng.pc and libpng-config to "all:" target in 16 makefiles.
+ Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH)
+ Added missing "\" before closing double quote in makefile.gcmmx.
+ Plugged various memory leaks; added png_malloc_warn() and png_set_text_2()
+ functions.
+
+Version 1.2.4beta2 [June 25, 2002]
+ Plugged memory leak of png_ptr->current_text (Matt Holgate).
+ Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison)
+ Added -soname to the loader flags in makefile.dec, makefile.sgi, and
+ makefile.sggcc.
+ Added "test-installed" target to makefile.linux, makefile.gcmmx,
+ makefile.sgi, and makefile.sggcc.
+
+Version 1.2.4beta3 [June 28, 2002]
+ Plugged memory leak of row_buf in pngtest.c when there is a png_error().
+ Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.
+ Added "test-installed" target to makefile.32sunu, makefile.64sunu,
+ makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,
+ makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.
+
+Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
+ Added "test-installed" target to makefile.cygwin and makefile.sco.
+ Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro.
+
+Version 1.2.4 and 1.0.14 [July 8, 2002]
+ Changed png_warning() to png_error() when width is too large to process.
+
+Version 1.2.4patch01 [July 20, 2002]
+ Revised makefile.cygwin to use DLL number 12 instead of 13.
+
+Version 1.2.5beta1 [August 6, 2002]
+ Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
+ Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
+ Removed some stray *.o files from contrib/gregbook.
+ Changed png_error() to png_warning() about "Too much data" in pngpread.c
+ and about "Extra compressed data" in pngrutil.c.
+ Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
+ Updated makefile.hpgcc
+ Updated png.c and pnggccrd.c handling of return from png_mmx_support()
+
+Version 1.2.5beta2 [August 15, 2002]
+ Only issue png_warning() about "Too much data" in pngpread.c when avail_in
+ is nonzero.
+ Updated makefiles to install a separate libpng.so.3 with its own rpath.
+
+Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
+ Revised makefiles to not remove previous minor versions of shared libraries.
+
+Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
+ Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
+ library loader directive.
+ Added missing "$OBJSDLL" line to makefile.gcmmx.
+ Added missing "; fi" to makefile.32sunu.
+
+Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
+ Revised libpng-config script.
+
+Version 1.2.5 and 1.0.15 [October 3, 2002]
+ Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,
+ and makefile.aix.
+ Relocated two misplaced PNGAPI lines in pngtest.c
+
+Version 1.2.6beta1 [October 22, 2002]
+ Commented out warning about uninitialized mmx_support in pnggccrd.c.
+ Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.
+ Relocated two more misplaced PNGAPI lines in pngtest.c
+ Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams,
+ introduced in version 1.0.2.
+ Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu.
+
+Version 1.2.6beta2 [November 1, 2002]
+ Added libpng-config "--ldopts" output.
+ Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)"
+ in makefiles.
+
+Version 1.2.6beta3 [July 18, 2004]
+ Reverted makefile changes from version 1.2.6beta2 and some of the changes
+ from version 1.2.6beta1; these will be postponed until version 1.2.7.
+ Version 1.2.6 is going to be a simple bugfix release.
+ Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile.
+ Fixed potential overrun in pngerror.c by using strncpy instead of memcpy.
+ Added "#!/bin/sh" at the top of configure, for recognition of the
+ 'x' flag under Cygwin (Cosmin).
+ Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin).
+ Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin).
+ Fixed the special memory handler for Borland C under DOS, in pngmem.c
+ (Cosmin).
+ Removed some spurious assignments in pngrutil.c (Cosmin).
+ Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings
+ on 16-bit platforms (Cosmin).
+ Enclosed shift op expressions in parentheses, to silence warnings (Cosmin).
+ Used proper type png_fixed_point, to avoid problems on 16-bit platforms,
+ in png_handle_sRGB() (Cosmin).
+ Added compression_type to png_struct, and optimized the window size
+ inside the deflate stream (Cosmin).
+ Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin).
+ Fixed handling of unknown chunks that come after IDAT (Cosmin).
+ Allowed png_error() and png_warning() to work even if png_ptr == NULL
+ (Cosmin).
+ Replaced row_info->rowbytes with row_bytes in png_write_find_filter()
+ (Cosmin).
+ Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre).
+ Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded
+ values in png.c (Simon-Pierre, Cosmin).
+ Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre).
+ Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc
+ (Simon-Pierre).
+ Moved the definition of PNG_HEADER_VERSION_STRING near the definitions
+ of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin).
+ Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin).
+ Updated scripts/makefile.vc(a)win32 (Cosmin).
+ Updated the MSVC project (Simon-Pierre, Cosmin).
+ Updated the Borland C++ Builder project (Cosmin).
+ Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin).
+ Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin).
+ Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin).
+ Added extra guard around inclusion of Turbo C memory headers, in pngconf.h
+ (Cosmin).
+ Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to
+ projects/cbuilder5/ (Cosmin).
+ Moved projects/visualc6/png32ms.def to scripts/pngw32.def,
+ and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin).
+ Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin).
+ Changed line endings to DOS style in cbuilder5 and visualc6 files, even
+ in the tar.* distributions (Cosmin).
+ Updated contrib/visupng/VisualPng.dsp (Cosmin).
+ Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin).
+ Added a separate distribution with "configure" and supporting files (Junichi).
+
+Version 1.2.6beta4 [July 28, 2004]
+ Added user ability to change png_size_t via a PNG_SIZE_T macro.
+ Added png_sizeof() and png_convert_size() functions.
+ Added PNG_SIZE_MAX (maximum value of a png_size_t variable.
+ Added check in png_malloc_default() for (size_t)size != (png_uint_32)size
+ which would indicate an overflow.
+ Changed sPLT failure action from png_error to png_warning and abandon chunk.
+ Changed sCAL and iCCP failures from png_error to png_warning and abandon.
+ Added png_get_uint_31(png_ptr, buf) function.
+ Added PNG_UINT_32_MAX macro.
+ Renamed PNG_MAX_UINT to PNG_UINT_31_MAX.
+ Made png_zalloc() issue a png_warning and return NULL on potential
+ overflow.
+ Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x
+ Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4.
+ Revised Borland portion of png_malloc() to return NULL or issue
+ png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK.
+ Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove
+ sequential read support.
+ Added some "#if PNG_WRITE_SUPPORTED" blocks.
+ Added #ifdef to remove some redundancy in png_malloc_default().
+ Use png_malloc instead of png_zalloc to allocate the pallete.
+
+Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
+ Fixed buffer overflow vulnerability in png_handle_tRNS()
+ Fixed integer arithmetic overflow vulnerability in png_read_png().
+ Fixed some harmless bugs in png_handle_sBIT, etc, that would cause
+ duplicate chunk types to go undetected.
+ Fixed some timestamps in the -config version
+ Rearranged order of processing of color types in png_handle_tRNS().
+ Added ROWBYTES macro to calculate rowbytes without integer overflow.
+ Updated makefile.darwin and removed makefile.macosx from scripts directory.
+ Imposed default one million column, one-million row limits on the image
+ dimensions, and added png_set_user_limits() function to override them.
+ Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro.
+ Fixed wrong cast of returns from png_get_user_width|height_max().
+ Changed some "keep the compiler happy" from empty statements to returns,
+ Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution
+
+Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004]
+ Revised makefile.darwin and makefile.solaris. Removed makefile.macosx.
+ Revised pngtest's png_debug_malloc() to use png_malloc() instead of
+ png_malloc_default() which is not supposed to be exported.
+ Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in
+ pngpread.c. Bug was introduced in 1.2.6rc1.
+ Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1.
+ Fixed old bug in RGB to Gray transformation.
+ Fixed problem with 64-bit compilers by casting arguments to abs()
+ to png_int_32.
+ Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9).
+ Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin)
+ Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles.
+ Added code to update the row_info->colortype in png_do_read_filler() (MSB).
+
+Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004]
+ Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid
+ trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro.
+ Revised documentation of png_set_keep_unknown_chunks().
+ Check handle_as_unknown status in pngpread.c, as in pngread.c previously.
+ Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h
+ Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c
+
+Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004]
+ Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of
+ "pinfo" was out of place).
+
+Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]
+ Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED
+ section of png.h where they were inadvertently placed in version rc3.
+
+Version 1.2.6 and 1.0.16 [August 15, 2004]
+ Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.
+
+Version 1.2.7beta1 [August 26, 2004]
+ Removed unused pngasmrd.h file.
+ Removed references to uu.net for archived files. Added references to
+ PNG Spec (second edition) and the PNG ISO/IEC Standard.
+ Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR.
+ Fixed bug with "optimized window size" in the IDAT datastream, that
+ causes libpng to write PNG files with incorrect zlib header bytes.
+
+Version 1.2.7beta2 [August 28, 2004]
+ Fixed bug with sCAL chunk and big-endian machines (David Munro).
+ Undid new code added in 1.2.6rc2 to update the color_type in
+ png_set_filler().
+ Added png_set_add_alpha() that updates color type.
+
+Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]
+ Revised png_set_strip_filler() to not remove alpha if color_type has alpha.
+
+Version 1.2.7 and 1.0.17 [September 12, 2004]
+ Added makefile.hp64
+ Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin
+
+Version 1.2.8beta1 [November 1, 2004]
+ Fixed bug in png_text_compress() that would fail to complete a large block.
+ Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
+ strip alpha operation in png_do_strip_filler().
+ Added PNG_1_2_X definition in pngconf.h
+ Use #ifdef to comment out png_info_init in png.c and png_read_init in
+ pngread.c (as of 1.3.0)
+
+Version 1.2.8beta2 [November 2, 2004]
+ Reduce color_type to a nonalpha type after strip alpha operation in
+ png_do_strip_filler().
+
+Version 1.2.8beta3 [November 3, 2004]
+ Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM
+
+Version 1.2.8beta4 [November 12, 2004]
+ Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).
+ Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).
+ Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection
+ of data type in deflate (Cosmin).
+ Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of
+ PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
+
+Version 1.2.8beta5 [November 20, 2004]
+ Use png_ptr->flags instead of png_ptr->transformations to pass
+ PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI
+ compatibility.
+ Revised handling of SPECIALBUILD, PRIVATEBUILD,
+ PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
+
+Version 1.2.8rc1 [November 24, 2004]
+ Moved handling of BUILD macros from pngconf.h to png.h
+ Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently
+ omitted from beta5.
+ Revised scripts/pngw32.rc
+ Despammed mailing addresses by masking "@" with "at".
+ Inadvertently installed a supposedly faster test version of pngrutil.c
+
+Version 1.2.8rc2 [November 26, 2004]
+ Added two missing "\" in png.h
+ Change tests in pngread.c and pngpread.c to
+ if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
+ png_do_read_transformations(png_ptr);
+
+Version 1.2.8rc3 [November 28, 2004]
+ Reverted pngrutil.c to version libpng-1.2.8beta5.
+ Added scripts/makefile.elf with supporting code in pngconf.h for symbol
+ versioning (John Bowler).
+
+Version 1.2.8rc4 [November 29, 2004]
+ Added projects/visualc7 (Simon-pierre).
+
+Version 1.2.8rc5 [November 29, 2004]
+ Fixed new typo in scripts/pngw32.rc
+
+Version 1.2.8 [December 3, 2004]
+ Removed projects/visualc7, added projects/visualc71.
+
+Version 1.2.9beta1 [February 21, 2006]
+ Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints
+ Revised man page and libpng.txt to make it clear that one should not call
+ png_read_end or png_write_end after png_read_png or png_write_png.
+ Updated references to png-mng-implement mailing list.
+ Fixed an incorrect typecast in pngrutil.c
+ Added PNG_NO_READ_SUPPORTED conditional for making a write-only library.
+ Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional.
+ Optimized alpha-inversion loops in pngwtran.c
+ Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c
+ Make sure num_trans is <= 256 before copying data in png_set_tRNS().
+ Make sure num_palette is <= 256 before copying data in png_set_PLTE().
+ Interchanged order of write_swap_alpha and write_invert_alpha transforms.
+ Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).
+ Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin).
+ Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin).
+ Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16,
+ png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin).
+ Added type cast (png_byte) in png_write_sCAL() (Cosmin).
+ Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin).
+ Default iTXt support was inadvertently enabled.
+
+Version 1.2.9beta2 [February 21, 2006]
+ Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
+ checking for png_read_dither in pngrtran.c
+ Revised checking of chromaticity limits to accommodate extended RGB
+ colorspace (John Denker).
+ Changed line endings in some of the project files to CRLF, even in the
+ "Unix" tar distributions (Cosmin).
+ Made png_get_int_32 and png_save_int_32 always available (Cosmin).
+ Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def
+ with the newly exported functions.
+ Eliminated distributions without the "configure" script.
+ Updated INSTALL instructions.
+
+Version 1.2.9beta3 [February 24, 2006]
+ Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp
+ Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)
+ Removed reference to pngasmrd.h from Makefile.am
+ Renamed CHANGES to ChangeLog.
+ Renamed LICENSE to COPYING.
+ Renamed ANNOUNCE to NEWS.
+ Created AUTHORS file.
+
+Version 1.2.9beta4 [March 3, 2006]
+ Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
+ Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
+ Removed newline from the end of some error and warning messages.
+ Removed test for sqrt() from configure.ac and configure.
+ Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).
+ Disabled default iTXt support that was inadvertently enabled in
+ libpng-1.2.9beta1.
+ Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
+ Removed libpng version and date from *.c files.
+
+Version 1.2.9beta5 [March 4, 2006]
+ Removed trailing blanks from source files.
+ Put version and date of latest change in each source file, and changed
+ copyright year accordingly.
+ More cleanup of configure.ac, Makefile.am, and associated scripts.
+ Restored scripts/makefile.elf which was inadvertently deleted.
+
+Version 1.2.9beta6 [March 6, 2006]
+ Fixed typo (RELEASE) in configuration files.
+
+Version 1.2.9beta7 [March 7, 2006]
+ Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
+ Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()
+ in png.h.
+ Updated makefile.elf as suggested by debian.
+ Made cosmetic changes to some makefiles, adding LN_SF and other macros.
+ Made some makefiles accept "exec_prefix".
+
+Version 1.2.9beta8 [March 9, 2006]
+ Fixed some "#if defined (..." which should be "#if defined(..."
+ Bug introduced in libpng-1.2.8.
+ Fixed inconsistency in definition of png_default_read_data()
+ Restored blank that was lost from makefile.sggcc "clean" target in beta7.
+ Revised calculation of "current" and "major" for irix in ltmain.sh
+ Changed "mkdir" to "MKDIR_P" in some makefiles.
+ Separated PNG_EXPAND and PNG_EXPAND_tRNS.
+ Added png_set_expand_gray_1_2_4_to_8() and deprecated
+ png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.
+
+Version 1.2.9beta9 [March 10, 2006]
+ Include "config.h" in pngconf.h when available.
+ Added some checks for NULL png_ptr or NULL info_ptr (timeless)
+
+Version 1.2.9beta10 [March 20, 2006]
+ Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)
+ Made pnggccrd.c PIC-compliant (Christian Aichinger).
+ Added makefile.mingw (Wolfgang Glas).
+ Revised pngconf.h MMX checking.
+
+Version 1.2.9beta11 [March 22, 2006]
+ Fixed out-of-order declaration in pngwrite.c that was introduced in beta9
+ Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.
+
+Version 1.2.9rc1 [March 31, 2006]
+ Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).
+ Removed nonsensical assertion check from pngtest.c (Cosmin).
+
+Version 1.2.9 [April 14, 2006]
+ Revised makefile.beos and added "none" selector in ltmain.sh
+
+Version 1.2.10beta1 [April 15, 2006]
+ Renamed "config.h" to "png_conf.h" and revised Makefile.am to add
+ -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h
+ to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.
+
+Version 1.2.10beta2 [April 15, 2006]
+ Manually updated Makefile.in and configure. Changed png_conf.h.in
+ back to config.h.
+
+Version 1.2.10beta3 [April 15, 2006]
+ Change png_conf.h back to config.h in pngconf.h.
+
+Version 1.2.10beta4 [April 16, 2006]
+ Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.
+
+Version 1.2.10beta5 [April 16, 2006]
+ Added a configure check for compiling assembler code in pnggccrd.c
+
+Version 1.2.10beta6 [April 17, 2006]
+ Revised the configure check for pnggccrd.c
+ Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@
+ Added @LIBPNG_DEFINES@ to arguments when building libpng.sym
+
+Version 1.2.10beta7 [April 18, 2006]
+ Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.
+
+Version 1.2.10rc1 [April 19, 2006]
+ Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD
+ Fixed "LN_FS" typo in makefile.sco and makefile.solaris.
+
+Version 1.2.10rc2 [April 20, 2006]
+ Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE
+ in configure.ac and configure
+ Made the configure warning about versioned symbols less arrogant.
+
+Version 1.2.10rc3 [April 21, 2006]
+ Added a note in libpng.txt that png_set_sig_bytes(8) can be used when
+ writing an embedded PNG without the 8-byte signature.
+ Revised makefiles and configure to avoid making links to libpng.so.*
+
+Version 1.2.10 [April 23, 2006]
+ Reverted configure to "rc2" state.
+
+Version 1.2.11beta1 [May 31, 2006]
+ scripts/libpng.pc.in contained "configure" style version info and would
+ not work with makefiles.
+ The shared-library makefiles were linking to libpng.so.0 instead of
+ libpng.so.3 compatibility as the library.
+
+Version 1.2.11beta2 [June 2, 2006]
+ Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
+ buffer overflow.
+ Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb)
+
+Version 1.2.11beta3 [June 5, 2006]
+ Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin).
+ Removed the accidental leftover Makefile.in~ (Cosmin).
+ Avoided potential buffer overflow and optimized buffer in
+ png_write_sCAL(), png_write_sCAL_s() (Cosmin).
+ Removed the include directories and libraries from CFLAGS and LDFLAGS
+ in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin).
+
+Version 1.2.11beta4 [June 6, 2006]
+ Allow zero-length IDAT chunks after the entire zlib datastream, but not
+ after another intervening chunk type.
+
+Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]
+ Deleted extraneous square brackets from [config.h] in configure.ac
+
+Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]
+ Added prototypes for PNG_INCH_CONVERSIONS functions to png.h
+ Revised INSTALL and autogen.sh
+ Fixed typo in several makefiles (-W1 should be -Wl)
+ Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
+
+Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]
+ Removed the new typedefs for 64-bit systems (delay until version 1.4.0)
+ Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid
+ reading out of bounds.
+
+Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]
+ Really removed the new typedefs for 64-bit systems.
+
+Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]
+ Removed png_sig_bytes entry from scripts/pngw32.def
+
+Version 1.0.19, 1.2.11 [June 26, 2006]
+ None.
+
+Version 1.0.20, 1.2.12 [June 27, 2006]
+ Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
+ buffer overflow.
+
+Version 1.2.13beta1 [October 2, 2006]
+ Removed AC_FUNC_MALLOC from configure.ac
+ Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
+ Change "logical" to "bitwise" throughout documentation.
+ Detect and fix attempt to write wrong iCCP profile length.
+
+Version 1.0.21, 1.2.13 [November 14, 2006]
+ Fix potential buffer overflow in sPLT chunk handler.
+ Fix Makefile.am to not try to link to noexistent files.
+ Check all exported functions for NULL png_ptr.
+
+Version 1.2.14beta1 [November 17, 2006]
+ Relocated three misplaced tests for NULL png_ptr.
+ Built Makefile.in with automake-1.9.6 instead of 1.9.2.
+ Build configure with autoconf-2.60 instead of 2.59
+
+Version 1.2.14beta2 [November 17, 2006]
+ Added some typecasts in png_zalloc().
+
+Version 1.2.14rc1 [November 20, 2006]
+ Changed "strtod" to "png_strtod" in pngrutil.c
+
+Version 1.0.22, 1.2.14 [November 27, 2006]
+ Added missing "$(srcdir)" in Makefile.am and Makefile.in
+
+Version 1.2.15beta1 [December 3, 2006]
+ Generated configure with autoconf-2.61 instead of 2.60
+ Revised configure.ac to update libpng.pc and libpng-config.
+
+Version 1.2.15beta2 [December 3, 2006]
+ Always export MMX asm functions, just stubs if not building pnggccrd.c
+
+Version 1.2.15beta3 [December 4, 2006]
+ Add "png_bytep" typecast to profile while calculating length in pngwutil.c
+
+Version 1.2.15beta4 [December 7, 2006]
+ Added scripts/CMakeLists.txt
+ Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta
+
+Version 1.2.15beta5 [December 7, 2006]
+ Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c
+ Revised scripts/CMakeLists.txt
+
+Version 1.2.15beta6 [December 13, 2006]
+ Revised scripts/CMakeLists.txt and configure.ac
+
+Version 1.2.15rc1 [December 18, 2006]
+ Revised scripts/CMakeLists.txt
+
+Version 1.2.15rc2 [December 21, 2006]
+ Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
+ Added scripts/makefile.nommx
+
+Version 1.2.15rc3 [December 25, 2006]
+ Fixed shared library numbering error that was introduced in 1.2.15beta6.
+
+Version 1.2.15rc4 [December 27, 2006]
+ Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.
+
+Version 1.2.15rc5 [December 31, 2006]
+ Revised handling of rgb_to_gray.
+
+Version 1.2.15 [January 5, 2007]
+ Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
+
+Version 1.2.16beta1 [January 6, 2007]
+ Fix bugs in makefile.nommx
+
+Version 1.2.16beta2 [January 16, 2007]
+ Revised scripts/CMakeLists.txt
+
+Version 1.2.16 [January 31, 2007]
+ No changes.
+
+Version 1.2.17beta1 [March 6, 2007]
+ Revised scripts/CMakeLists.txt to install both shared and static libraries.
+ Deleted a redundant line from pngset.c.
+
+Version 1.2.17beta2 [April 26, 2007]
+ Relocated misplaced test for png_ptr == NULL in pngpread.c
+ Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN
+ flags.
+ Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_*
+ Added pngerror() when write_IHDR fails in deflateInit2().
+ Added "const" to some array declarations.
+ Mention examples of libpng usage in the libpng*.txt and libpng.3 documents.
+
+Version 1.2.17rc1 [May 4, 2007]
+ No changes.
+
+Version 1.2.17rc2 [May 8, 2007]
+ Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications
+ calling set_unknown_chunk_location() need them.
+ Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in
+ png_set_expand_gray_1_2_4_to_8().
+ Added png_ptr->unknown_chunk to hold working unknown chunk data, so it
+ can be free'ed in case of error. Revised unknown chunk handling in
+ pngrutil.c and pngpread.c to use this structure.
+
+Version 1.2.17rc3 [May 8, 2007]
+ Revised symbol-handling in configure script.
+
+Version 1.2.17rc4 [May 10, 2007]
+ Revised unknown chunk handling to avoid storing unknown critical chunks.
+
+Version 1.0.25 [May 15, 2007]
+Version 1.2.17 [May 15, 2007]
+ Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,
+ to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664)
+
+Version 1.0.26 [May 15, 2007]
+Version 1.2.18 [May 15, 2007]
+ Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script
+
+Version 1.2.19beta1 [May 18, 2007]
+ Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
+ change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST"
+ Changed some handling of unused parameters, to avoid compiler warnings.
+ "if (unused == NULL) return;" becomes "unused = unused".
+
+Version 1.2.19beta2 [May 18, 2007]
+ Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier)
+
+Version 1.2.19beta3 [May 19, 2007]
+ Add some "png_byte" typecasts in png_check_keyword() and write new_key
+ instead of key in zTXt chunk (Kevin Ryde).
+
+Version 1.2.19beta4 [May 21, 2007]
+ Add png_snprintf() function and use it in place of sprint() for improved
+ defense against buffer overflows.
+
+Version 1.2.19beta5 [May 21, 2007]
+ Fixed png_handle_tRNS() to only use the valid bits of tRNS value.
+ Changed handling of more unused parameters, to avoid compiler warnings.
+ Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.
+
+Version 1.2.19beta6 [May 22, 2007]
+ Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
+ Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
+
+Version 1.2.19beta7 [May 22, 2007]
+ Squelched png_squelch_warnings() in pnggccrd.c and added
+ an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
+ the warnings that png_squelch_warnings was squelching.
+
+Version 1.2.19beta8 [May 22, 2007]
+ Removed __MMX__ from test in pngconf.h.
+
+Version 1.2.19beta9 [May 23, 2007]
+ Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
+ Revised png_squelch_warnings() so it might work.
+ Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.
+
+Version 1.2.19beta10 [May 24, 2007]
+ Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.
+
+Version 1.4.0beta1 [April 20, 2006]
+ Enabled iTXt support (changes png_struct, thus requires so-number change).
+ Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED
+ Eliminated PNG_1_0_X and PNG_1_2_X macros.
+ Removed deprecated functions png_read_init, png_write_init, png_info_init,
+ png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and
+ removed the deprecated macro PNG_MAX_UINT.
+ Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h
+ Removed many WIN32_WCE #ifdefs (Cosmin).
+ Reduced dependency on C-runtime library when on Windows (Simon-Pierre)
+ Replaced sprintf() with png_sprintf() (Simon-Pierre)
+
+Version 1.4.0beta2 [April 20, 2006]
+ Revised makefiles and configure to avoid making links to libpng.so.*
+ Moved some leftover MMX-related defines from pngconf.h to pngintrn.h
+ Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def
+
+Version 1.4.0beta3 [May 10, 2006]
+ Updated scripts/pngw32.def to comment out MMX functions.
+ Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros.
+ Scripts/libpng.pc.in contained "configure" style version info and would
+ not work with makefiles.
+ Revised pngconf.h and added pngconf.h.in, so makefiles and configure can
+ pass defines to libpng and applications.
+
+Version 1.4.0beta4 [May 11, 2006]
+ Revised configure.ac, Makefile.am, and many of the makefiles to write
+ their defines in pngconf.h.
+
+Version 1.4.0beta5 [May 15, 2006]
+ Added a missing semicolon in Makefile.am and Makefile.in
+ Deleted extraneous square brackets from configure.ac
+
+Version 1.4.0beta6 [June 2, 2006]
+ Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
+ buffer overflow.
+ Changed sonum from 0 to 1.
+ Removed unused prototype for png_check_sig() from png.h
+
+Version 1.4.0beta7 [June 16, 2006]
+ Exported png_write_sig (Cosmin).
+ Optimized buffer in png_handle_cHRM() (Cosmin).
+ Set pHYs = 2835 x 2835 pixels per meter, and added
+ sCAL = 0.352778e-3 x 0.352778e-3 meters, in pngtest.png (Cosmin).
+ Added png_set_benign_errors(), png_benign_error(), png_chunk_benign_error().
+ Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
+ Added "(unsigned long)" typecast on png_uint_32 variables in printf lists.
+
+Version 1.4.0beta8 [June 22, 2006]
+ Added demonstration of user chunk support in pngtest.c, to support the
+ public sTER chunk and a private vpAg chunk.
+
+Version 1.4.0beta9 [July 3, 2006]
+ Removed ordinals from scripts/pngw32.def and removed png_info_int and
+ png_set_gray_1_2_4_to_8 entries.
+ Inline call of png_get_uint_32() in png_get_uint_31().
+ Use png_get_uint_31() to get vpAg width and height in pngtest.c
+ Removed WINCE and Netware projects.
+ Removed standalone Y2KINFO file.
+
+Version 1.4.0beta10 [July 12, 2006]
+ Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and
+ some makefiles, because it was not working reliably. Instead, distribute
+ pngconf.h.in along with pngconf.h and cause configure and some of the
+ makefiles to update pngconf.h from pngconf.h.in.
+ Added pngconf.h to DEPENDENCIES in Makefile.am
+
+Version 1.4.0beta11 [August 19, 2006]
+ Removed AC_FUNC_MALLOC from configure.ac.
+ Added a warning when writing iCCP profile with mismatched profile length.
+ Patched pnggccrd.c to assemble on x86_64 platforms.
+ Moved chunk header reading into a separate function png_read_chunk_header()
+ in pngrutil.c. The chunk header (len+sig) is now serialized in a single
+ operation (Cosmin).
+ Implemented support for I/O states. Added png_ptr member io_state, and
+ functions png_get_io_chunk_name() and png_get_io_state() in pngget.c
+ (Cosmin).
+ Added png_get_io_chunk_name and png_get_io_state to scripts/*.def (Cosmin).
+ Renamed scripts/pngw32.* to scripts/pngwin.* (Cosmin).
+ Removed the include directories and libraries from CFLAGS and LDFLAGS
+ in scripts/makefile.gcc (Cosmin).
+ Used png_save_uint_32() to set vpAg width and height in pngtest.c (Cosmin).
+ Cast to proper type when getting/setting vpAg units in pngtest.c (Cosmin).
+ Added pngintrn.h to the Visual C++ projects (Cosmin).
+ Removed scripts/list (Cosmin).
+ Updated copyright year in scripts/pngwin.def (Cosmin).
+ Removed PNG_TYPECAST_NULL and used standard NULL consistently (Cosmin).
+ Disallowed the user to redefine png_size_t, and enforced a consistent use
+ of png_size_t across libpng (Cosmin).
+ Changed the type of png_ptr->rowbytes, PNG_ROWBYTES() and friends
+ to png_size_t (Cosmin).
+ Removed png_convert_size() and replaced png_sizeof with sizeof (Cosmin).
+ Removed some unnecessary type casts (Cosmin).
+ Changed prototype of png_get_compression_buffer_size() and
+ png_set_compression_buffer_size() to work with png_size_t instead of
+ png_uint_32 (Cosmin).
+ Removed png_memcpy_check() and png_memset_check() (Cosmin).
+ Fixed a typo (png_byte --> png_bytep) in libpng.3 and libpng.txt (Cosmin).
+ Clarified that png_zalloc() does not clear the allocated memory,
+ and png_zalloc() and png_zfree() cannot be PNGAPI (Cosmin).
+ Renamed png_mem_size_t to png_alloc_size_t, fixed its definition in
+ pngconf.h, and used it in all memory allocation functions (Cosmin).
+ Renamed pngintrn.h to pngpriv.h, added a comment at the top of the file
+ mentioning that the symbols declared in that file are private, and
+ updated the scripts and the Visual C++ projects accordingly (Cosmin).
+ Removed circular references between pngconf.h and pngconf.h.in in
+ scripts/makefile.vc*win32 (Cosmin).
+ Removing trailing '.' from the warning and error messages (Cosmin).
+ Added pngdefs.h that is built by makefile or configure, instead of
+ pngconf.h.in (Glenn).
+ Detect and fix attempt to write wrong iCCP profile length.
+
+Version 1.4.0beta12 [October 19, 2006]
+ Changed "logical" to "bitwise" in the documentation.
+ Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
+ Add a typecast to stifle compiler warning in pngrutil.c
+
+Version 1.4.0beta13 [November 10, 2006]
+ Fix potential buffer overflow in sPLT chunk handler.
+ Fix Makefile.am to not try to link to noexistent files.
+
+Version 1.4.0beta14 [November 15, 2006]
+ Check all exported functions for NULL png_ptr.
+
+Version 1.4.0beta15 [November 17, 2006]
+ Relocated two misplaced tests for NULL png_ptr.
+ Built Makefile.in with automake-1.9.6 instead of 1.9.2.
+ Build configure with autoconf-2.60 instead of 2.59
+ Add "install: all" in Makefile.am so "configure; make install" will work.
+
+Version 1.4.0beta16 [November 17, 2006]
+ Added a typecast in png_zalloc().
+
+Version 1.4.0beta17 [December 4, 2006]
+ Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c
+ Add "png_bytep" typecast to profile while calculating length in pngwutil.c
+
+Version 1.4.0beta18 [December 7, 2006]
+ Added scripts/CMakeLists.txt
+
+Version 1.4.0beta19 [May 16, 2007]
+ Revised scripts/CMakeLists.txt
+ Rebuilt configure and Makefile.in with newer tools.
+ Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
+ Added scripts/makefile.nommx
+
+Version 1.4.0beta20 [July 9, 2008]
+ Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications
+ calling set_unknown_chunk_location() need them.
+ Moved several macro definitions from pngpriv.h to pngconf.h
+ Merge with changes to the 1.2.X branch, as of 1.2.30beta04.
+ Deleted all use of the MMX assembler code and Intel-licensed optimizations.
+ Revised makefile.mingw
+
+Version 1.4.0beta21 [July 21, 2008]
+ Moved local array "chunkdata" from pngrutil.c to the png_struct, so
+ it will be freed by png_read_destroy() in case of a read error (Kurt
+ Christensen).
+
+Version 1.4.0beta22 [July 21, 2008]
+ Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking.
+
+Version 1.4.0beta23 [July 22, 2008]
+ Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in
+ png_decompress_chunk().
+
+Version 1.4.0beta24 [July 25, 2008]
+ Change all remaining "chunkdata" to "png_ptr->chunkdata" in
+ png_decompress_chunk(), and remove "chunkdata" from parameter list.
+ Put a call to png_check_chunk_name() in png_read_chunk_header().
+ Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte.
+ Removed two calls to png_check_chunk_name() occuring later in the process.
+ Define PNG_NO_ERROR_NUMBERS by default in pngconf.h
+
+Version 1.4.0beta25 [July 30, 2008]
+ Added a call to png_check_chunk_name() in pngpread.c
+ Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte.
+ Added png_push_have_buffer() function to pngpread.c
+ Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros.
+ Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS.
+ Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code.
+ Synced contrib directory and configure files with libpng-1.2.30beta06.
+ Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles)
+ Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c
+
+Version 1.4.0beta26 [August 4, 2008]
+ Removed png_push_have_buffer() function in pngpread.c. It increased the
+ compiled library size slightly.
+ Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta)
+ Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings.
+ Updated contrib/visupng/cexcept.h to version 2.0.1
+ Added PNG_LITERAL_CHARACTER macros for #, [, and ].
+
+Version 1.4.0beta27 [August 5, 2008]
+ Revised usage of PNG_LITERAL_SHARP in pngerror.c.
+ Moved newline character from individual png_debug messages into the
+ png_debug macros.
+ Allow user to #define their own png_debug, png_debug1, and png_debug2.
+
+Version 1.4.0beta28 [August 5, 2008]
+ Revised usage of PNG_LITERAL_SHARP in pngerror.c.
+ Added PNG_STRING_NEWLINE macro
+
+Version 1.4.0beta29 [August 9, 2008]
+ Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers.
+ Added PNG_STRING_COPYRIGHT macro.
+ Added non-ISO versions of png_debug macros.
+
+Version 1.4.0beta30 [August 14, 2008]
+ Added premultiplied alpha feature (Volker Wiendl).
+
+Version 1.4.0beta31 [August 18, 2008]
+ Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c
+ Removed extra crc check at the end of png_handle_cHRM(). Bug introduced
+ in libpng-1.4.0beta20.
+
+Version 1.4.0beta32 [August 19, 2008]
+ Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.
+ Revised PNG_NO_STDIO version of png_write_flush()
+
+Version 1.4.0beta33 [August 20, 2008]
+ Added png_get|set_chunk_cache_max() to limit the total number of sPLT,
+ text, and unknown chunks that can be stored.
+
+Version 1.4.0beta34 [September 6, 2008]
+ Shortened tIME_string to 29 bytes in pngtest.c
+ Fixed off-by-one error introduced in png_push_read_zTXt() function in
+ libpng-1.2.30beta04/pngpread.c (Harald van Dijk)
+
+Version 1.4.0beta35 [October 6, 2008]
+ Changed "trans_values" to "trans_color".
+ Changed so-number from 0 to 14. Some OS do not like 0.
+ Revised makefile.darwin to fix shared library numbering.
+ Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8()
+ in example.c (debian bug report)
+
+Version 1.4.0beta36 [October 25, 2008]
+ Sync with tEXt vulnerability fix in libpng-1.2.33rc02.
+
+Version 1.4.0beta37 [November 13, 2008]
+ Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c,
+ and pngwrite.c
+
+Version 1.4.0beta38 [November 22, 2008]
+ Added check for zero-area RGB cHRM triangle in png_check_cHRM() and
+ png_check_cHRM_fixed().
+
+Version 1.4.0beta39 [November 23, 2008]
+ Revised png_warning() to write its message on standard output by default
+ when warning_fn is NULL.
+
+Version 1.4.0beta40 [November 24, 2008]
+ Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed().
+ In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant
+ check for all-zero coordinates that is detected by the triangle check.
+
+Version 1.4.0beta41 [November 26, 2008]
+ Fixed string vs pointer-to-string error in png_check_keyword().
+ Rearranged test expressions in png_check_cHRM_fixed() to avoid internal
+ overflows.
+ Added PNG_NO_CHECK_cHRM conditional.
+
+Version 1.4.0beta42, 43 [December 1, 2008]
+ Merge png_debug with version 1.2.34beta04.
+
+Version 1.4.0beta44 [December 6, 2008]
+ Removed redundant check for key==NULL before calling png_check_keyword()
+ to ensure that new_key gets initialized and removed extra warning
+ (Merge with version 1.2.34beta05 -- Arvan Pritchard).
+
+Version 1.4.0beta45 [December 9, 2008]
+ In png_write_png(), respect the placement of the filler bytes in an earlier
+ call to png_set_filler() (Jim Barry).
+
+Version 1.4.0beta46 [December 10, 2008]
+ Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and
+ PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated
+ PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
+
+Version 1.4.0beta47 [December 15, 2008]
+ Support for dithering was disabled by default, because it has never
+ been well tested and doesn't work very well. The code has not
+ been removed, however, and can be enabled by building libpng with
+ PNG_READ_DITHER_SUPPORTED defined.
+
+Version 1.4.0beta48 [February 14, 2009]
+ Added new exported function png_calloc().
+ Combined several instances of png_malloc(); png_memset() into png_calloc().
+ Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
+ but was never defined.
+
+Version 1.4.0beta49 [February 28, 2009]
+ Added png_fileno() macro to pngconf.h, used in pngwio.c
+ Corrected order of #ifdef's in png_debug definition in png.h
+ Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments
+ for pcal_params.
+ Fixed order of #ifdef directives in the png_debug defines in png.h
+ (bug introduced in libpng-1.2.34/1.4.0beta29).
+ Revised comments in png_set_read_fn() and png_set_write_fn().
+
+Version 1.4.0beta50 [March 18, 2009]
+ Use png_calloc() instead of png_malloc() to allocate big_row_buf when
+ reading an interlaced file, to avoid a possible UMR.
+ Undid revision of PNG_NO_STDIO version of png_write_flush(). Users
+ having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined
+ or supply their own flush_fn() replacement.
+ Revised libpng*.txt and png.h documentation about use of png_write_flush()
+ and png_set_write_fn().
+ Removed fflush() from pngtest.c.
+ Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
+
+Version 1.4.0beta51 [March 21, 2009]
+ Removed new png_fileno() macro from pngconf.h .
+
+Version 1.4.0beta52 [March 27, 2009]
+ Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
+ This avoids building 16-bit gamma tables unnecessarily.
+ Removed fflush() from pngtest.c.
+ Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
+ Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt
+
+Version 1.4.0beta53 [April 1, 2009]
+ Removed some remaining MMX macros from pngpriv.h
+ Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)
+
+Version 1.4.0beta54 [April 13, 2009]
+ Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow
+ application code writers to bypass the check for multiple inclusion
+ of setjmp.h when they know that it is safe to ignore the situation.
+ Eliminated internal use of setjmp() in pngread.c and pngwrite.c
+ Reordered ancillary chunks in pngtest.png to be the same as what
+ pngtest now produces, and made some cosmetic changes to pngtest output.
+ Eliminated deprecated png_read_init_3() and png_write_init_3() functions.
+
+Version 1.4.0beta55 [April 15, 2009]
+ Simplified error handling in pngread.c and pngwrite.c by putting
+ the new png_read_cleanup() and png_write_cleanup() functions inline.
+
+Version 1.4.0beta56 [April 25, 2009]
+ Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress
+ "shadowed declaration" warning from gcc-4.3.3.
+ Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"
+ warning about a global "gamma" variable in math.h on some platforms.
+
+Version 1.4.0beta57 [May 2, 2009]
+ Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
+ but was never defined (again).
+ Rebuilt configure scripts with autoconf-2.63 instead of 2.62
+ Removed pngprefs.h and MMX from makefiles
+
+Version 1.4.0beta58 [May 14, 2009]
+ Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced
+ in beta57).
+ Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
+
+Version 1.4.0beta59 [May 15, 2009]
+ Reformated sources in libpng style (3-space intentation, comment format)
+ Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)
+ Added sections about the git repository and our coding style to the
+ documentation
+ Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.
+
+Version 1.4.0beta60 [May 19, 2009]
+ Conditionally compile png_read_finish_row() which is not used by
+ progressive readers.
+ Added contrib/pngminim/preader to demonstrate building minimal progressive
+ decoder, based on contrib/gregbook with embedded libpng and zlib.
+
+Version 1.4.0beta61 [May 20, 2009]
+ In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there
+ is only one makefile in those directories, and revised the README files
+ accordingly.
+ More reformatting of comments, mostly to capitalize sentences.
+
+Version 1.4.0beta62 [June 2, 2009]
+ Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
+ and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
+ Reformatted several remaining "else statement" into two lines.
+ Added a section to the libpng documentation about using png_get_io_ptr()
+ in configure scripts to detect the presence of libpng.
+
+Version 1.4.0beta63 [June 15, 2009]
+ Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
+ multiple times and to specify the sample order in the tRNS chunk,
+ because the ISO PNG specification has a typo in the tRNS table.
+ Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
+ PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
+ available for ignoring known chunks even when not saving unknown chunks.
+ Adopted preference for consistent use of "#ifdef" and "#ifndef" versus
+ "#if defined()" and "if !defined()" where possible.
+
+Version 1.4.0beta64 [June 24, 2009]
+ Eliminated PNG_LEGACY_SUPPORTED code.
+ Moved the various unknown chunk macro definitions outside of the
+ PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
+
+Version 1.4.0beta65 [June 26, 2009]
+ Added a reference to the libpng license in each file.
+
+Version 1.4.0beta66 [June 27, 2009]
+ Refer to the libpng license instead of the libpng license in each file.
+
+Version 1.4.0beta67 [July 6, 2009]
+ Relocated INVERT_ALPHA within png_read_png() and png_write_png().
+ Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.
+ Added an "xcode" project to the projects directory (Alam Arias).
+
+Version 1.4.0beta68 [July 19, 2009]
+ Avoid some tests in filter selection in pngwutil.c
+
+Version 1.4.0beta69 [July 25, 2009]
+ Simplified the new filter-selection test. This runs faster in the
+ common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases.
+ Removed extraneous declaration from the new call to png_read_gray_to_rgb()
+ (bug introduced in libpng-1.4.0beta67).
+ Fixed up xcode project (Alam Arias)
+ Added a prototype for png_64bit_product() in png.c
+
+Version 1.4.0beta70 [July 27, 2009]
+ Avoid a possible NULL dereference in debug build, in png_set_text_2().
+ (bug introduced in libpng-0.95, discovered by Evan Rouault)
+
+Version 1.4.0beta71 [July 29, 2009]
+ Rebuilt configure scripts with autoconf-2.64.
+
+Version 1.4.0beta72 [August 1, 2009]
+ Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec
+ from <http://tukaani.org/xz>.
+
+Version 1.4.0beta73 [August 1, 2009]
+ Reject attempt to write iCCP chunk with negative embedded profile length
+ (JD Chen)
+
+Version 1.4.0beta74 [August 8, 2009]
+ Changed png_ptr and info_ptr member "trans" to "trans_alpha".
+
+Version 1.4.0beta75 [August 21, 2009]
+ Removed an extra png_debug() recently added to png_write_find_filter().
+ Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
+
+Version 1.4.0beta76 [August 22, 2009]
+ Moved an incorrectly located test in png_read_row() in pngread.c
+
+Version 1.4.0beta77 [August 27, 2009]
+ Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt,
+ and the "noconfig" files from the distribution.
+ Moved CMakeLists.txt from scripts into the main libpng directory.
+ Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
+
+Version 1.4.0beta78 [August 31, 2009]
+ Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
+ Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros.
+ Use png_malloc plus a loop instead of png_calloc() to initialize
+ row_pointers in png_read_png().
+
+Version 1.4.0beta79 [September 1, 2009]
+ Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays.
+ Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc().
+
+Version 1.4.0beta80 [September 17, 2009]
+ Removed scripts/libpng.icc
+ Changed typecast of filler from png_byte to png_uint_16 in png_set_filler().
+ (Dennis Gustafsson)
+ Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ")
+
+Version 1.4.0beta81 [September 23, 2009]
+ Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h
+ Expanded TAB characters in pngrtran.c
+ Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid
+ compiler complaints about doubly declaring things "const".
+ Changed all "#if [!]defined(X)" to "if[n]def X" where possible.
+ Eliminated unused png_ptr->row_buf_size
+
+Version 1.4.0beta82 [September 25, 2009]
+ Moved redundant IHDR checking into new png_check_IHDR() in png.c
+ and report all errors found in the IHDR data.
+ Eliminated useless call to png_check_cHRM() from pngset.c
+
+Version 1.4.0beta83 [September 25, 2009]
+ Revised png_check_IHDR() to eliminate bogus complaint about filter_type.
+
+Version 1.4.0beta84 [September 30, 2009]
+ Fixed some inconsistent indentation in pngconf.h
+ Revised png_check_IHDR() to add a test for width variable less than 32-bit.
+
+Version 1.4.0beta85 [October 1, 2009]
+ Revised png_check_IHDR() again, to check info_ptr members instead of
+ the contents of the returned parameters.
+
+Version 1.4.0beta86 [October 9, 2009]
+ Updated the "xcode" project (Alam Arias).
+ Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
+
+Version 1.4.0rc01 [October 19, 2009]
+ Trivial cosmetic changes.
+
+Version 1.4.0beta87 [October 30, 2009]
+ Moved version 1.4.0 back into beta.
+
+Version 1.4.0beta88 [October 30, 2009]
+ Revised libpng*.txt section about differences between 1.2.x and 1.4.0
+ because most of the new features have now been ported back to 1.2.41
+
+Version 1.4.0beta89 [November 1, 2009]
+ More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
+ Removed a harmless extra png_set_invert_alpha() from pngwrite.c
+ Apply png_user_chunk_cache_max within png_decompress_chunk().
+ Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.
+
+Version 1.4.0beta90 [November 2, 2009]
+ Removed all remaining WIN32_WCE #ifdefs except those involving the
+ time.h "tm" structure
+
+Version 1.4.0beta91 [November 3, 2009]
+ Updated scripts/pngw32.def and projects/wince/png32ce.def
+ Copied projects/wince/png32ce.def to the scripts directory.
+ Added scripts/makefile.wce
+ Patched ltmain.sh for wince support.
+ Added PNG_CONVERT_tIME_SUPPORTED macro.
+
+Version 1.4.0beta92 [November 4, 2009]
+ Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
+ Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED
+ Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead
+ of differences from 1.2.41 to 1.4.0)
+
+Version 1.4.0beta93 [November 7, 2009]
+ Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and
+ PNG_ALLOCATED macros to detect deprecated direct access to the
+ png_struct or info_struct members and other deprecated usage in
+ applications (John Bowler).
+ Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS,
+ to prevent warnings about direct access to png structs by libpng
+ functions while building libpng. They need to be tested, especially
+ those using compilers other than gcc.
+ Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG".
+ They should work but still need to be updated to remove
+ references to pnggccrd.c or pngvcrd.c and ASM building.
+ Added README.txt to the beos, cbuilder5, netware, and xcode projects warning
+ that they need to be updated, to remove references to pnggccrd.c and
+ pngvcrd.c and to depend on pngpriv.h
+ Removed three direct references to read_info_ptr members in pngtest.c
+ that were detected by the new PNG_DEPSTRUCT macro.
+ Moved the png_debug macro definitions and the png_read_destroy(),
+ png_write_destroy() and png_far_to_near() prototypes from png.h
+ to pngpriv.h (John Bowler)
+ Moved the synopsis lines for png_read_destroy(), png_write_destroy()
+ png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3.
+
+Version 1.4.0beta94 [November 9, 2009]
+ Removed the obsolete, unused pnggccrd.c and pngvcrd.c files.
+ Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
+ Removed dependency of pngtest.o on pngpriv.h in the makefiles.
+ Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
+
+Version 1.4.0beta95 [November 10, 2009]
+ Changed png_check_sig() to !png_sig_cmp() in contrib programs.
+ Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile
+ Changed png_check_sig() to !png_sig_cmp() in contrib programs.
+ Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
+ Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c
+ Added dependency on pngpriv.h in contrib/pngminim/*/makefile
+
+Version 1.4.0beta96 [November 12, 2009]
+ Renamed scripts/makefile.wce to scripts/makefile.cegcc
+ Revised Makefile.am to use libpng.sys while building libpng.so
+ so that only PNG_EXPORT functions are exported.
+ Removed the deprecated png_check_sig() function/macro.
+ Removed recently removed function names from scripts/*.def
+ Revised pngtest.png to put chunks in the same order written by pngtest
+ (evidently the same change made in libpng-1.0beta54 was lost).
+ Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
+
+Version 1.4.0beta97 [November 13, 2009]
+ Restored pngtest.png to the libpng-1.4.0beta7 version.
+ Removed projects/beos and netware.txt; no one seems to be supporting them.
+ Revised Makefile.in
+
+Version 1.4.0beta98 [November 13, 2009]
+ Added the "xcode" project to zip distributions,
+ Fixed a typo in scripts/pngwin.def introduced in beta97.
+
+Version 1.4.0beta99 [November 14, 2009]
+ Moved libpng-config.in and libpng.pc-configure.in out of the scripts
+ directory, to libpng-config.in and libpng-pc.in, respectively, and
+ modified Makefile.am and configure.ac accordingly. Now "configure"
+ needs nothing from the "scripts" directory.
+ Avoid redefining PNG_CONST in pngconf.h
+
+Version 1.4.0beta100 [November 14, 2009]
+ Removed ASM builds from projects/visualc6 and projects/visualc71
+ Removed scripts/makefile.nommx and makefile.vcawin32
+ Revised CMakeLists.txt to account for new location of libpng-config.in
+ and libpng-pc.in
+ Updated INSTALL to reflect removal and relocation of files.
+
+Version 1.4.0beta101 [November 14, 2009]
+ Restored the binary files (*.jpg, *.png, some project files) that were
+ accidentally deleted from the zip and 7z distributions when the xcode
+ project was added.
+
+Version 1.4.0beta102 [November 18, 2009]
+ Added libpng-config.in and libpng-pc.in to the zip and 7z distributions.
+ Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100.
+ Moved descriptions of makefiles and other scripts out of INSTALL into
+ scripts/README.txt
+ Updated the copyright year in scripts/pngwin.rc from 2006 to 2009.
+
+Version 1.4.0beta103 [November 21, 2009]
+ Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt
+ Align row_buf on 16-byte boundary in memory.
+ Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call
+ to png_flush() after png_write_IEND(). See 1.4.0beta32, 1.4.0beta50
+ changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES. Someone
+ needs this feature.
+ Make the 'png_jmpbuf' macro expand to a call that records the correct
+ longjmp function as well as returning a pointer to the setjmp
+ jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
+ (John Bowler)
+
+Version 1.4.0beta104 [November 22, 2009]
+ Removed png_longjmp_ptr from scripts/*.def and libpng.3
+ Rebuilt configure scripts with autoconf-2.65
+
+Version 1.4.0beta105 [November 25, 2009]
+ Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535()
+ to accomplish alpha premultiplication when
+ PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined.
+ Changed "/255" to "/255.0" in background calculations to make it clear
+ that the 255 is used as a double.
+
+Version 1.4.0beta106 [November 27, 2009]
+ Removed premultiplied alpha feature.
+
+Version 1.4.0beta107 [December 4, 2009]
+ Updated README
+ Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
+ Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
+ Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
+ to put png.h and pngconf.h in $prefix/include, like the other scripts,
+ instead of in $prefix/include/libpng. Also revised makefile.sco
+ to put them in $prefix/include/libpng15 instead of in
+ $prefix/include/libpng/libpng15.
+
+Version 1.4.0beta108 [December 11, 2009]
+ Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
+ Relocated png_do_chop() to its original position in pngrtran.c; the
+ change in version 1.2.41beta08 caused transparency to be handled wrong
+ in some 16-bit datastreams (Yusaku Sugai).
+
+Version 1.4.0beta109 [December 13, 2009]
+ Added "bit_depth" parameter to the private png_build_gamma_table() function.
+ Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the
+ PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit
+ tables.
+
+Version 1.4.0rc02 [December 20, 2009]
+ Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c
+
+Version 1.4.0rc03 [December 22, 2009]
+ Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
+ (revising the change in 1.4.0beta99)
+
+Version 1.4.0rc04 [December 25, 2009]
+ Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ in pngset.c to be consistent with other changes in version 1.2.38.
+
+Version 1.4.0rc05 [December 25, 2009]
+ Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and
+ Makefile.in to be consistent with changes in libpng-1.4.0rc03
+
+Version 1.4.0rc06 [December 29, 2009]
+ Reverted the gamma_table changes from libpng-1.4.0beta109.
+ Fixed some indentation errors.
+
+Version 1.4.0rc07 [January 1, 2010]
+ Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences.
+ Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c
+ Update copyright year to 2010.
+
+Version 1.4.0rc08 [January 2, 2010]
+ Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr
+ in pngtest.c
+
+Version 1.4.0 [January 3, 2010]
+ No changes.
+
+Version 1.4.1beta01 [January 8, 2010]
+ Updated CMakeLists.txt for consistent indentation and to avoid an
+ unclosed if-statement warning (Philip Lowman).
+ Revised Makefile.am and Makefile.in to remove references to Y2KINFO,
+ KNOWNBUG, and libpng.la (Robert Schwebel).
+ Revised the makefiles to install the same files and symbolic
+ links as configure, except for libpng.la and libpng14.la.
+ Make png_set|get_compression_buffer_size() available even when
+ PNG_WRITE_SUPPORTED is not enabled.
+ Revised Makefile.am and Makefile.in to simplify their maintenance.
+ Revised scripts/makefile.linux to install a link to libpng14.so.14.1
+
+Version 1.4.1beta02 [January 9, 2010]
+ Revised the rest of the makefiles to install a link to libpng14.so.14.1
+
+Version 1.4.1beta03 [January 10, 2010]
+ Removed png_set_premultiply_alpha() from scripts/*.def
+
+Version 1.4.1rc01 [January 16, 2010]
+ No changes.
+
+Version 1.4.1beta04 [January 23, 2010]
+ Revised png_decompress_chunk() to improve speed and memory usage when
+ decoding large chunks.
+ Added png_set|get_chunk_malloc_max() functions.
+
+Version 1.4.1beta05 [January 26, 2010]
+ Relocated "int k" declaration in pngtest.c to minimize its scope.
+
+Version 1.4.1beta06 [January 28, 2010]
+ Revised png_decompress_chunk() to use a two-pass method suggested by
+ John Bowler.
+
+Version 1.4.1beta07 [February 6, 2010]
+ Folded some long lines in the source files.
+ Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,
+ and a PNG_USER_LIMITS_SUPPORTED flag.
+ Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as
+ png_ptr->png_user_chunk_malloc_max.
+ Revised png_push_save_buffer() to do fewer but larger png_malloc() calls.
+
+Version 1.4.1beta08 [February 6, 2010]
+ Minor cleanup and updating of dates and copyright year.
+
+Version 1.5.0beta01 [February 7, 2010]
+ Moved declaration of png_struct into private pngstruct.h and png_info
+ into pnginfo.h
+
+Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010]
+ Reverted to original png_push_save_buffer() code.
+
+Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010]
+ Return allocated "old_buffer" in png_push_save_buffer() before
+ calling png_error(), to avoid a potential memory leak.
+ Updated configure script to use SO number 15.
+
+Version 1.5.0beta04 [February 9, 2010]
+ Removed malformed "incomplete struct declaration" of png_info from png.h
+
+Version 1.5.0beta05 [February 12, 2010]
+ Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the
+ linewrapping that it entailed.
+ Revised comments in pngstruct.h and pnginfo.h and added pointers to
+ the libpng license.
+ Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES
+ Removed the cbuilder5 project, which has not been updated to 1.4.0.
+
+Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]
+ Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke
+ Nishikawa)
+
+Version 1.5.0beta07 [omitted]
+
+Version 1.5.0beta08 [February 19, 2010]
+ Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED
+ wherever png_snprintf() is used to construct error and warning messages.
+ Noted in scripts/makefile.mingw that it expects to be run under MSYS.
+ Removed obsolete unused MMX-querying support from contrib/gregbook
+ Added exported png_longjmp() function.
+ Removed the AIX redefinition of jmpbuf in png.h
+ Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt
+ when building on AIX.
+
+Version 1.5.0beta09 [February 19, 2010]
+ Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.
+ Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h
+
+Version 1.5.0beta10 [February 25, 2010]
+ Removed unused gzio.c from contrib/pngminim gather and makefile scripts
+ Removed replacement error handlers from contrib/gregbook. Because of
+ the new png_longjmp() function they are no longer needed.
+
+Version 1.5.0beta11 [March 6, 2010]
+ Removed checking for already-included setjmp.h from pngconf.h
+ Fixed inconsistent indentations and made numerous cosmetic changes.
+ Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
+
+Version 1.5.0beta12 [March 9, 2010]
+ Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from
+ the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES"
+ and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler).
+ Created new pngdebug.h and moved debug definitions there.
+
+Version 1.5.0beta13 [March 10, 2010]
+ Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
+ Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
+ PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
+ is defined.
+ Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
+ Moved the 'config.h' support from pngconf.h to pngpriv.h
+ Removed PNGAPI from the png_longjmp_ptr typedef.
+ Eliminated dependence of pngtest.c on the private pngdebug.h file.
+ Make all png_debug macros into *unterminated* statements or
+ expressions (i.e. a trailing ';' must always be added) and correct
+ the format statements in various png_debug messages.
+
+Version 1.5.0beta14 [March 14, 2010]
+ Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
+ Revised Makefile.am to account for recent additions and replacements.
+ Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and
+ added ordinal numbers to the Windows DEF file and corrected the duplicated
+ ordinal numbers on CE symbols that are commented out.
+ Added back in export symbols that can be present in the Windows build but
+ are disabled by default.
+ PNG_EXPORT changed to include an 'ordinal' field for DEF file generation.
+ PNG_CALLBACK added to make callback definitions uniform. PNGAPI split
+ into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks),
+ and appropriate changes made to all files. Cygwin builds re-hinged to
+ allow procedure call standard changes and to remove the need for the DEF
+ file (fixes build on Cygwin).
+ Enabled 'attribute' warnings that are relevant to library APIs and callbacks.
+ Changed rules for generation of the various symbol files and added a new
+ rule for a DEF file (which is also added to the distribution).
+ Updated the symbol file generation to stop it adding spurious spaces
+ to EOL (coming from preprocessor macro expansion). Added a facility
+ to join tokens in the output and rewrite *.dfn to use this.
+ Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71
+ and removed scripts/makefile.cygwin.
+ Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built.
+ Removed the include of sys/types.h - apparently unnecessary now on the
+ platforms on which it happened (all but Mac OS and RISC OS).
+ Moved the Mac OS test into pngpriv.h (the only place it is used.)
+
+Version 1.5.0beta15 [March 17, 2010]
+ Added symbols.chk target to Makefile.am to validate the symbols in png.h
+ against the new DEF file scripts/symbols.def.
+ Changed the default DEF file back to pngwin.def.
+ Removed makefile.mingw.
+ Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
+
+Version 1.5.0beta16 [April 1, 2010]
+ Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that
+ fields are initialized in all configurations. The READ/WRITE
+ macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as
+ before to disable code to actually read or write iTXt chunks
+ and iTXt_SUPPORTED can be used to detect presence of either
+ read or write support (but it is probably better to check for
+ the one actually required - read or write.)
+ Combined multiple png_warning() calls for a single error.
+ Restored the macro definition of png_check_sig().
+
+Version 1.5.0beta17 [April 17, 2010]
+ Added some "(long)" typecasts to printf calls in png_handle_cHRM().
+ Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
+ Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
+ more accurately what it actually does. At the same time, renamed
+ the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
+ PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
+ Added some "(long)" typecasts to printf calls in png_handle_cHRM().
+ Freeze build-time only configuration in the build.
+ In all prior versions of libpng most configuration options
+ controlled by compiler #defines had to be repeated by the
+ application code that used libpng. This patch changes this
+ so that compilation options that can only be changed at build
+ time are frozen in the build. Options that are compiler
+ dependent (and those that are system dependent) are evaluated
+ each time - pngconf.h holds these. Options that can be changed
+ per-file in the application are in png.h. Frozen options are
+ in the new installed header file pnglibconf.h (John Bowler)
+ Removed the xcode project because it has not been updated to work
+ with libpng-1.5.0.
+ Removed the ability to include optional pngusr.h
+
+Version 1.5.0beta18 [April 17, 2010]
+ Restored the ability to include optional pngusr.h
+ Moved replacements for png_error() and png_warning() from the
+ contrib/pngminim project to pngerror.c, for use when warnings or
+ errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
+ storing unneeded error/warning text.
+ Updated contrib/pngminim project to work with the new pnglibconf.h
+ Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
+
+Version 1.5.0beta19 [April 24, 2010]
+ Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions
+ to read and write ints to be disabled independently of PNG_USE_READ_MACROS,
+ which allows libpng to be built with the functions even though the default
+ is to use the macros - this allows applications to choose at app build
+ time whether or not to use macros (previously impossible because the
+ functions weren't in the default build.)
+ Changed Windows calling convention back to __cdecl for API functions.
+ For Windows/x86 platforms only:
+ __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses
+ __cdecl throughout (both API functions and callbacks) on Windows/x86
+ platforms.
+ Replaced visualc6 and visualc71 projects with new vstudio project
+ Relaxed the overly-restrictive permissions of some files.
+
+Version 1.5.0beta20 [April 24, 2010]
+ Relaxed more overly-restrictive permissions of some files.
+
+Version 1.5.0beta21 [April 27, 2010]
+ Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new
+ vstudio project files, and some trivial editing of some files in the
+ scripts directory.
+ Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in
+ contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
+
+Version 1.5.0beta22 [April 28, 2010]
+ Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS
+ because it has a macro equivalent.
+ Improved the options.awk script; added an "everything off" option.
+ Revised contrib/pngminim to use the "everything off" option in pngusr.dfa.
+
+Version 1.5.0beta23 [April 29, 2010]
+ Corrected PNG_REMOVED macro to take five arguments.
+ The macro was documented with two arguments (name,ordinal), however
+ the symbol checking .dfn files assumed five arguments. The five
+ argument form seems more useful so it is changed to that.
+ Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ in gregbook/readpng2.c
+ Corrected protection of png_get_user_transform_ptr. The API declaration in
+ png.h is removed if both READ and WRITE USER_TRANSFORM are turned off
+ but was left defined in pngtrans.c
+ Added logunsupported=1 to cause pnglibconf.h to document disabled options.
+ This makes the installed pnglibconf.h more readable but causes no
+ other change. The intention is that users of libpng will find it
+ easier to understand if an API they need is missing.
+ Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
+ Removed dummy_inflate.c from contrib/pngminim/encoder
+ Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile.
+
+Version 1.5.0beta24 [May 7, 2010]
+ Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the
+ offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.
+ Added more blank lines for readability.
+
+Version 1.5.0beta25 [June 18, 2010]
+ In pngpread.c: png_push_have_row() add check for new_row > height
+ Removed the now-redundant check for out-of-bounds new_row from example.c
+
+Version 1.5.0beta26 [June 18, 2010]
+ In pngpread.c: png_push_process_row() add check for too many rows.
+
+Version 1.5.0beta27 [June 18, 2010]
+ Removed the check added in beta25 as it is now redundant.
+
+Version 1.5.0beta28 [June 20, 2010]
+ Rewrote png_process_IDAT_data to consistently treat extra data as warnings
+ and handle end conditions more cleanly.
+ Removed the new (beta26) check in png_push_process_row().
+
+Version 1.5.0beta29 [June 21, 2010]
+ Revised scripts/options.awk to work on Sunos (but still doesn't work)
+ Added comment to options.awk and contrib/pngminim/*/makefile to try nawk.
+
+Version 1.5.0beta30 [June 22, 2010]
+ Stop memory leak when reading a malformed sCAL chunk.
+
+Version 1.5.0beta31 [June 26, 2010]
+ Revised pngpread.c patch of beta28 to avoid an endless loop.
+ Removed some trailing blanks.
+
+Version 1.5.0beta32 [June 26, 2010]
+ Removed leftover scripts/options.patch and scripts/options.rej
+
+Version 1.5.0beta33 [July 6, 3010]
+ Made FIXED and FLOATING options consistent in the APIs they enable and
+ disable. Corrected scripts/options.awk to handle both command line
+ options and options specified in the .dfa files.
+ Changed char *msg to PNG_CONST char *msg in pngrutil.c
+ Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or
+ floating point APIs, but not both.
+ Reversed patch to remove error handler when the jmp_buf is stored in the
+ main program structure, not the png_struct.
+ The error handler is needed because the default handler in libpng will
+ always use the jmp_buf in the library control structure; this is never
+ set. The gregbook code is a useful example because, even though it
+ uses setjmp/longjmp, it shows how error handling can be implemented
+ using control mechanisms not directly supported by libpng. The
+ technique will work correctly with mechanisms such as Microsoft
+ Structure Exceptions or C++ exceptions (compiler willing - note that gcc
+ does not by default support interworking of C and C++ error handling.)
+ Reverted changes to call png_longjmp in contrib/gregbook where it is not
+ appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp
+ cannot be used.
+ Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)
+ Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')
+
+Version 1.5.0beta34 [July 12, 2010]
+ Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h
+
+Version 1.5.0beta35 [July 24, 2010]
+ Removed some newly-added TAB characters.
+ Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
+ Moved the definition of png_snprintf() outside of the enclosing
+ #ifdef blocks in pngconf.h
+
+Version 1.5.0beta36 [July 29, 2010]
+ Patches by John Bowler:
+ Fixed point APIs are now supported throughout (no missing APIs).
+ Internal fixed point arithmetic support exists for all internal floating
+ point operations.
+ sCAL validates the floating point strings it is passed.
+ Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2
+ Two new APIs exist to get the number of passes without turning on the
+ PNG_INTERLACE transform and to get the number of rows in the current
+ pass.
+ A new test program, pngvalid.c, validates the gamma code.
+ Errors in the 16 bit gamma correction (overflows) have been corrected.
+ cHRM chunk testing is done consistently (previously the floating point
+ API bypassed it, because the test really didn't work on FP, now the test
+ is performed on the actual values to be stored in the PNG file so it
+ works in the FP case too.)
+ Most floating point APIs now simply call the fixed point APIs after
+ converting the values to the fixed point form used in the PNG file.
+ The standard headers no longer include zlib.h, which is currently only
+ required for pngstruct.h and can therefore be internal.
+ Revised png_get_int_32 to undo the PNG two's complement representation of
+ negative numbers.
+
+Version 1.5.0beta37 [July 30, 2010]
+ Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid
+ a compiler warning.
+ Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
+
+Version 1.5.0beta38 [July 31, 2010]
+ Implemented remaining "_fixed" functions.
+ Corrected a number of recently introduced warnings mostly resulting from
+ safe but uncast assignments to shorter integers. Also added a zlib
+ VStudio release library project because the latest zlib Official Windows
+ build does not include such a thing.
+ Revised png_get_int_16() to be similar to png_get_int_32().
+ Restored projects/visualc71.
+
+Version 1.5.0beta39 [August 2, 2010]
+ VisualC/GCC warning fixes, VisualC build fixes
+ The changes include support for function attributes in VC in addition to
+ those already present in GCC - necessary because without these some
+ warnings are unavoidable. Fixes include signed/unsigned fixes in
+ pngvalid and checks with gcc -Wall -Wextra -Wunused.
+ VC requires function attributes on function definitions as well as
+ declarations, PNG_FUNCTION has been added to enable this and the
+ relevant function definitions changed.
+
+Version 1.5.0beta40 [August 6, 2010]
+ Correct use of _WINDOWS_ in pngconf.h
+ Removed png_mem_ #defines; they are no longer used.
+ Added the sRGB chunk to pngtest.png
+
+Version 1.5.0beta41 [August 11, 2010]
+ Added the cHRM chunk to pngtest.png
+ Don't try to use version-script with cygwin/mingw.
+ Revised contrib/gregbook to work under cygwin/mingw.
+
+Version 1.5.0beta42 [August 18, 2010]
+ Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
+ Made all API functions that have const arguments and constant string
+ literal pointers declare them (John Bowler).
+
+Version 1.5.0beta43 [August 20, 2010]
+ Removed spurious tabs, shorten long lines (no source change)
+ Also added scripts/chkfmt to validate the format of all the files that can
+ reasonably be validated (it is suggested to run "make distclean" before
+ checking, because some machine generated files have long lines.)
+ Reformatted the CHANGES file to be more consistent throughout.
+ Made changes to address various issues identified by GCC, mostly
+ signed/unsigned and shortening problems on assignment but also a few
+ difficult to optimize (for GCC) loops.
+ Fixed non-GCC fixed point builds. In png.c a declaration was misplaced
+ in an earlier update. Fixed to declare the auto variables at the head.
+ Use cexcept.h in pngvalid.c.
+
+Version 1.5.0beta44 [August 24, 2010]
+ Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
+ installing libpng in /usr/lib64 (Funda Wang).
+ Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
+ Revised CMakeLists.txt to make symlinks instead of copies when installing.
+ Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)
+ Implemented memory checks within pngvalid
+ Reformatted/rearranged pngvalid.c to assist use of progressive reader.
+ Check interlaced images in pngvalid
+ Clarified pngusr.h comments in pnglibconf.dfa
+ Simplified the pngvalid error-handling code now that cexcept.h is in place.
+ Implemented progressive reader in pngvalid.c for standard tests
+ Implemented progressive read in pngvalid.c gamma tests
+ Turn on progressive reader in pngvalid.c by default and tidy code.
+
+Version 1.5.0beta45 [August 26, 2010]
+ Added an explicit make step to projects/vstudio for pnglibconf.h
+ Also corrected zlib.vcxproj into which Visual Studio had introduced
+ what it calls an "authoring error". The change to make pnglibconf.h
+ simply copies the file; in the future it may actually generate the
+ file from scripts/pnglibconf.dfa as the other build systems do.
+ Changed pngvalid to work when floating point APIs are disabled
+ Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt
+ Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX
+ in pngpriv.h in case the user neglected to define them in their pngusr.h
+
+Version 1.5.0beta46 [August 28, 2010]
+ Added new private header files to libpng_sources in CMakeLists.txt
+ Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options.
+ Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project.
+
+Version 1.5.0beta47 [September 11, 2010]
+ Fixed a number of problems with 64-bit compilation reported by Visual
+ Studio 2010 (John Bowler).
+
+Version 1.5.0beta48 [October 4, 2010]
+ Updated CMakeLists.txt (Philip Lowman).
+ Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
+ $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
+ Fixed problem with symbols creation in Makefile.am which was assuming that
+ all versions of ccp write to standard output by default (Martin Banky). The
+ bug was introduced in libpng-1.2.9beta5.
+ Removed unused mkinstalldirs.
+
+Version 1.5.0beta49 [October 8, 2010]
+ Undid Makefile.am revision of 1.5.0beta48.
+
+Version 1.5.0beta50 [October 14, 2010]
+ Revised Makefile.in to account for mkinstalldirs being removed.
+ Added some "(unsigned long)" typecasts in printf statements in pngvalid.c.
+ Suppressed a compiler warning in png_handle_sPLT().
+ Check for out-of-range text compression mode in png_set_text().
+
+Version 1.5.0beta51 [October 15, 2010]
+ Changed embedded dates to "(PENDING RELEASE) in beta releases (and future
+ rc releases) to minimize the difference between releases.
+
+Version 1.5.0beta52 [October 16, 2010]
+ Restored some of the embedded dates (in png.h, png.c, documentation, etc.)
+
+Version 1.5.0beta53 [October 18, 2010]
+ Updated INSTALL to mention using "make maintainer-clean" and to remove
+ obsolete statement about a custom ltmain.sh
+ Disabled "color-tests" by default in Makefile.am so it will work with
+ automake versions earlier than 1.11.1
+ Use document name "libpng-manual.txt" instead of "libpng-<version>.txt"
+ to simplify version differences.
+ Removed obsolete remarks about setjmp handling from INSTALL.
+ Revised and renamed the typedef in png.h and png.c that was designed
+ to catch library and header mismatch.
+
+Version 1.5.0beta54 [November 10, 2010]
+ Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.
+ Used a consistent structure for the pngget.c functions.
+
+Version 1.5.0beta55 [November 21, 2010]
+ Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
+ Moved reading of file signature into png_read_sig (Cosmin)
+ Fixed atomicity of chunk header serialization (Cosmin)
+ Added test for io_state in pngtest.c (Cosmin)
+ Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.
+ Changes to remove gcc warnings (John Bowler)
+ Certain optional gcc warning flags resulted in warnings in libpng code.
+ With these changes only -Wconversion and -Wcast-qual cannot be turned on.
+ Changes are trivial rearrangements of code. -Wconversion is not possible
+ for pngrutil.c (because of the widespread use of += et al on variables
+ smaller than (int) or (unsigned int)) and -Wcast-qual is not possible
+ with pngwio.c and pngwutil.c because the 'write' callback and zlib
+ compression both fail to declare their input buffers with 'const'.
+
+Version 1.5.0beta56 [December 7, 2010]
+ Added the private PNG_UNUSED() macro definition in pngpriv.h.
+ Added some commentary about PNG_EXPORT in png.h and pngconf.h
+ Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the
+ objective of simplifying and improving the cosmetic appearance of png.h.
+ Fixed some incorrect "=" macro names in pnglibconf.dfa
+ Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt
+
+Version 1.5.0beta57 [December 9, 2010]
+ Documented the pngvalid gamma error summary with additional comments and
+ print statements.
+ Improved missing symbol handling in checksym.awk; symbols missing in both
+ the old and new files can now be optionally ignored, treated as errors
+ or warnings.
+ Removed references to pngvcrd.c and pnggccrd.c from the vstudio project.
+ Updated "libpng14" to "libpng15" in the visualc71 project.
+ Enabled the strip16 tests in pngvalid.`
+ Don't display test results (except PASS/FAIL) when running "make test".
+ Instead put them in pngtest-log.txt
+ Added "--with-zprefix=<string>" to configure.ac
+ Updated the prebuilt configuration files to autoconf version 2.68
+
+Version 1.5.0beta58 [December 19, 2010]
+ Fixed interlace image handling and add test cases (John Bowler)
+ Fixed the clean rule in Makefile.am to remove pngtest-log.txt
+ Made minor changes to work around warnings in gcc 3.4
+
+Version 1.5.0rc01 [December 27, 2010]
+ No changes.
+
+Version 1.5.0rc02 [December 27, 2010]
+ Eliminated references to the scripts/*.def files in project/visualc71.
+
+Version 1.5.0rc03 [December 28, 2010]
+ Eliminated scripts/*.def and revised Makefile.am accordingly
+
+Version 1.5.0rc04 [December 29, 2010]
+ Fixed bug in background transformation handling in pngrtran.c (it was
+ looking for the flag in png_ptr->transformations instead of in
+ png_ptr->flags) (David Raymond).
+
+Version 1.5.0rc05 [December 31, 2010]
+ Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin)
+
+Version 1.5.0rc06 [January 4, 2011]
+ Changed the new configure option "zprefix=string" to "zlib-prefix=string"
+
+Version 1.5.0rc07 [January 4, 2011]
+ Updated copyright year.
+
+Version 1.5.0 [January 6, 2011]
+ No changes.
+
+version 1.5.1beta01 [January 8, 2011]
+ Added description of png_set_crc_action() to the manual.
+ Added a note in the manual that the type of the iCCP profile was changed
+ from png_charpp to png_bytepp in png_get_iCCP(). This change happened
+ in version 1.5.0beta36 but is not noted in the CHANGES. Similarly,
+ it was changed from png_charpp to png_const_bytepp in png_set_iCCP().
+ Ensure that png_rgb_to_gray ignores palette mapped images, if libpng
+ internally happens to call it with one.
+ Fixed a failure to handle palette mapped images correctly.
+
+Version 1.5.1beta02 [January 14, 2011]
+ Fixed a bug in handling of interlaced images (bero at arklinux.org).
+ Updated CMakeLists.txt (Clifford Yapp)
+
+Version 1.5.1beta03 [January 14, 2011]
+ Fixed typecasting of some png_debug() statements (Cosmin)
+
+Version 1.5.1beta04 [January 16, 2011]
+ Updated documentation of png_set|get_tRNS() (Thomas Klausner).
+ Mentioned in the documentation that applications must #include "zlib.h"
+ if they need access to anything in zlib.h, and that a number of
+ macros such as png_memset() are no longer accessible by applications.
+ Corrected pngvalid gamma test "sample" function to access all of the color
+ samples of each pixel, instead of sampling the red channel three times.
+ Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow"
+ warnings, and (mistakenly) changed png_exp() to exp().
+
+Version 1.5.1beta05 [January 16, 2011]
+ Changed variable names png_index, png_div, png_exp, and png_gamma to
+ char_index, divisor, exp_b10, and gamma_val, respectively, and
+ changed exp() back to png_exp().
+
+Version 1.5.1beta06 [January 20, 2011]
+ Prevent png_push_crc_skip() from hanging while reading an unknown chunk
+ or an over-large compressed zTXt chunk with the progressive reader.
+ Eliminated more GCC "shadow" warnings.
+ Revised png_fixed() in png.c to avoid compiler warning about reaching the
+ end without returning anything.
+
+Version 1.5.1beta07 [January 22, 2011]
+ In the manual, describe the png_get_IHDR() arguments in the correct order.
+ Added const_png_structp and const_png_infop types, and used them in
+ prototypes for most png_get_*() functions.
+
+Version 1.5.1beta08 [January 23, 2011]
+ Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name()
+ Added synopses for the IO_STATE functions and other missing synopses
+ to the manual. Removed the synopses from libpngpf.3 because they
+ were out of date and no longer useful. Better information can be
+ obtained by reading the prototypes and comments in pngpriv.h
+ Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build
+ Added a make macro DFNCPP that is a CPP that will accept the tokens in
+ a .dfn file and adds configure stuff to test for such a CPP. ./configure
+ should fail if one is not available.
+ Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace.
+ Added png_get_current_row_number and png_get_current_pass_number for the
+ benefit of the user transform callback.
+ Added png_process_data_pause and png_process_data_skip for the benefit of
+ progressive readers that need to stop data processing or want to optimize
+ skipping of unread data (e.g., if the reader marks a chunk to be skipped.)
+
+Version 1.5.1beta09 [January 24, 2011]
+ Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error.
+ pngvalid contains tests of transforms, which tests are currently disabled
+ because they are incompletely tested. gray_to_rgb was failing to expand
+ the bit depth for smaller bit depth images; this seems to be a long
+ standing error and resulted, apparently, in invalid output. The
+ documentation did not accurately describe what libpng really does when
+ converting RGB to gray.
+
+Version 1.5.1beta10 [January 27, 2010]
+ Fixed incorrect examples of callback prototypes in the manual, that were
+ introduced in libpng-1.0.0.
+ In addition the order of the png_get_uint macros with respect to the
+ relevant function definitions has been reversed. This helps the
+ preprocessing of the symbol files be more robust. Furthermore, the
+ symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when
+ the library may actually be built with PNG_USE_READ_MACROS; this stops
+ the read macros interfering with the symbol file format.
+ Made the manual, synopses, and function prototypes use the function
+ argument names file_gamma, int_file_gamma, and srgb_intent consistently.
+
+Version 1.5.1beta11 [January 28, 2011]
+ Changed PNG_UNUSED from "param=param;" to "{if(param){}}".
+ Corrected local variable type in new API png_process_data_skip()
+ The type was self-evidently incorrect but only causes problems on 64 bit
+ architectures.
+ Added transform tests to pngvalid and simplified the arguments.
+
+Version 1.5.1rc01 [January 29, 2011]
+ No changes.
+
+Version 1.5.1rc02 [January 31, 2011]
+ Added a request in the manual that applications do not use "png_" or
+ "PNG_" to begin any of their own symbols.
+ Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h
+
+Version 1.5.1 [February 3, 2011]
+ No changes.
+
+Version 1.5.2beta01 [February 13, 2011]
+ More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
+ check formal parameters names in function declarations (as well as
+ definitions) to see if they match a name in the global namespace.
+ Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
+ old VisualC++ preprocessor.
+ Turned on interlace handling in png_read_png().
+ Fixed gcc pendantic warnings.
+ Handle longjmp in Cygwin.
+ Fixed png_get_current_row_number() in the interlaced case.
+ Cleaned up ALPHA flags and transformations.
+ Implemented expansion to 16 bits.
+
+Version 1.5.2beta02 [February 19, 2011]
+ Fixed mistake in the descriptions of user read_transform and write_transform
+ function prototypes in the manual. The row_info struct is png_row_infop.
+ Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior.
+ Corrected png_get_current_row_number documentation
+ Fixed the read/write row callback documentation.
+ This documents the current behavior, where the callback is called after
+ every row with information pertaining to the next row.
+
+Version 1.5.2beta03 [March 3, 2011]
+ Fixed scripts/makefile.vcwin32
+ Updated contrib/pngsuite/README to add the word "modify".
+ Define PNG_ALLOCATED to blank when _MSC_VER<1300.
+
+Version 1.5.2rc01 [March 19, 2011]
+ Define remaining attributes to blank when MSC_VER<1300.
+ ifdef out mask arrays in pngread.c when interlacing is not supported.
+
+Version 1.5.2rc02 [March 22, 2011]
+ Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
+ and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
+ from the makefiles.
+ Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
+ to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
+
+Version 1.5.2rc03 [March 24, 2011]
+ Don't include standard header files in png.h while building the symbol table,
+ to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
+
+Version 1.5.2 [March 31, 2011]
+
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+(subscription required; visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe)
+or to glennrp at users.sourceforge.net
+
+Glenn R-P
+*/ }
+#endif
--- /dev/null
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
+add_library (png_bundled STATIC
+ png.c
+ pngerror.c
+ pngget.c
+ pngmem.c
+ pngpread.c
+ pngread.c
+ pngrio.c
+ pngrtran.c
+ pngrutil.c
+ pngset.c
+ pngtrans.c
+ pngwio.c
+ pngwrite.c
+ pngwtran.c
+ pngwutil.c
+)
+
+set_target_properties (png_bundled PROPERTIES
+ COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS}"
+)
--- /dev/null
+
+This copy of the libpng notices is provided for your convenience. In case of
+any discrepancy between this copy and the notices in the file png.h that is
+included in the libpng distribution, the latter shall prevail.
+
+COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
+
+If you modify libpng you may insert additional notices immediately following
+this sentence.
+
+This code is released under the libpng license.
+
+libpng versions 1.2.6, August 15, 2004, through 1.5.2, March 31, 2011, are
+Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
+distributed according to the same disclaimer and license as libpng-1.2.5
+with the following individual added to the list of Contributing Authors
+
+ Cosmin Truta
+
+libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
+Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
+distributed according to the same disclaimer and license as libpng-1.0.6
+with the following individuals added to the list of Contributing Authors
+
+ Simon-Pierre Cadieux
+ Eric S. Raymond
+ Gilles Vollant
+
+and with the following additions to the disclaimer:
+
+ There is no warranty against interference with your enjoyment of the
+ library or against infringement. There is no warranty that our
+ efforts or the library will fulfill any of your particular purposes
+ or needs. This library is provided with all faults, and the entire
+ risk of satisfactory quality, performance, accuracy, and effort is with
+ the user.
+
+libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
+Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are
+distributed according to the same disclaimer and license as libpng-0.96,
+with the following individuals added to the list of Contributing Authors:
+
+ Tom Lane
+ Glenn Randers-Pehrson
+ Willem van Schaik
+
+libpng versions 0.89, June 1996, through 0.96, May 1997, are
+Copyright (c) 1996, 1997 Andreas Dilger
+Distributed according to the same disclaimer and license as libpng-0.88,
+with the following individuals added to the list of Contributing Authors:
+
+ John Bowler
+ Kevin Bracey
+ Sam Bushell
+ Magnus Holmgren
+ Greg Roelofs
+ Tom Tanner
+
+libpng versions 0.5, May 1995, through 0.88, January 1996, are
+Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
+
+For the purposes of this copyright and license, "Contributing Authors"
+is defined as the following set of individuals:
+
+ Andreas Dilger
+ Dave Martindale
+ Guy Eric Schalnat
+ Paul Schmidt
+ Tim Wegner
+
+The PNG Reference Library is supplied "AS IS". The Contributing Authors
+and Group 42, Inc. disclaim all warranties, expressed or implied,
+including, without limitation, the warranties of merchantability and of
+fitness for any purpose. The Contributing Authors and Group 42, Inc.
+assume no liability for direct, indirect, incidental, special, exemplary,
+or consequential damages, which may result from the use of the PNG
+Reference Library, even if advised of the possibility of such damage.
+
+Permission is hereby granted to use, copy, modify, and distribute this
+source code, or portions hereof, for any purpose, without fee, subject
+to the following restrictions:
+
+1. The origin of this source code must not be misrepresented.
+
+2. Altered versions must be plainly marked as such and must not
+ be misrepresented as being the original source.
+
+3. This Copyright notice may not be removed or altered from any
+ source or altered source distribution.
+
+The Contributing Authors and Group 42, Inc. specifically permit, without
+fee, and encourage the use of this source code as a component to
+supporting the PNG file format in commercial products. If you use this
+source code in a product, acknowledgment is not required but would be
+appreciated.
+
+
+A "png_get_copyright" function is available, for convenient use in "about"
+boxes and the like:
+
+ printf("%s",png_get_copyright(NULL));
+
+Also, the PNG logo (in PNG format, of course) is supplied in the
+files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
+
+Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
+certification mark of the Open Source Initiative.
+
+Glenn Randers-Pehrson
+glennrp at users.sourceforge.net
+March 31, 2011
--- /dev/null
+README for libpng version 1.5.2 - March 31, 2011 (shared library 15.0)
+See the note about version numbers near the top of png.h
+
+See INSTALL for instructions on how to install libpng.
+
+Libpng comes in several distribution formats. Get libpng-*.tar.gz,
+libpng-*.tar.xz or libpng-*.tar.bz2 if you want UNIX-style line endings
+in the text files, or lpng*.zip if you want DOS-style line endings.
+
+Version 0.89 was the first official release of libpng. Don't let the
+fact that it's the first release fool you. The libpng library has been in
+extensive use and testing since mid-1995. By late 1997 it had
+finally gotten to the stage where there hadn't been significant
+changes to the API in some time, and people have a bad feeling about
+libraries with versions < 1.0. Version 1.0.0 was released in
+March 1998.
+
+****
+Note that some of the changes to the png_info structure render this
+version of the library binary incompatible with libpng-0.89 or
+earlier versions if you are using a shared library. The type of the
+"filler" parameter for png_set_filler() has changed from png_byte to
+png_uint_32, which will affect shared-library applications that use
+this function.
+
+To avoid problems with changes to the internals of png_info_struct,
+new APIs have been made available in 0.95 to avoid direct application
+access to info_ptr. These functions are the png_set_<chunk> and
+png_get_<chunk> functions. These functions should be used when
+accessing/storing the info_struct data, rather than manipulating it
+directly, to avoid such problems in the future.
+
+It is important to note that the APIs do not make current programs
+that access the info struct directly incompatible with the new
+library. However, it is strongly suggested that new programs use
+the new APIs (as shown in example.c and pngtest.c), and older programs
+be converted to the new format, to facilitate upgrades in the future.
+****
+
+Additions since 0.90 include the ability to compile libpng as a
+Windows DLL, and new APIs for accessing data in the info struct.
+Experimental functions include the ability to set weighting and cost
+factors for row filter selection, direct reads of integers from buffers
+on big-endian processors that support misaligned data access, faster
+methods of doing alpha composition, and more accurate 16->8 bit color
+conversion.
+
+The additions since 0.89 include the ability to read from a PNG stream
+which has had some (or all) of the signature bytes read by the calling
+application. This also allows the reading of embedded PNG streams that
+do not have the PNG file signature. As well, it is now possible to set
+the library action on the detection of chunk CRC errors. It is possible
+to set different actions based on whether the CRC error occurred in a
+critical or an ancillary chunk.
+
+The changes made to the library, and bugs fixed are based on discussions
+on the PNG-implement mailing list and not on material submitted
+privately to Guy, Andreas, or Glenn. They will forward any good
+suggestions to the list.
+
+For a detailed description on using libpng, read libpng-manual.txt. For
+examples of libpng in a program, see example.c and pngtest.c. For usage
+information and restrictions (what little they are) on libpng, see
+png.h. For a description on using zlib (the compression library used by
+libpng) and zlib's restrictions, see zlib.h
+
+I have included a general makefile, as well as several machine and
+compiler specific ones, but you may have to modify one for your own needs.
+
+You should use zlib 1.0.4 or later to run this, but it MAY work with
+versions as old as zlib 0.95. Even so, there are bugs in older zlib
+versions which can cause the output of invalid compression streams for
+some images. You will definitely need zlib 1.0.4 or later if you are
+taking advantage of the MS-DOS "far" structure allocation for the small
+and medium memory models. You should also note that zlib is a
+compression library that is useful for more things than just PNG files.
+You can use zlib as a drop-in replacement for fread() and fwrite() if
+you are so inclined.
+
+zlib should be available at the same place that libpng is, or at.
+ftp://ftp.info-zip.org/pub/infozip/zlib
+
+You may also want a copy of the PNG specification. It is available
+as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find
+these at http://www.libpng.org/pub/png/documents/
+
+This code is currently being archived at libpng.sf.net in the
+[DOWNLOAD] area, and on CompuServe, Lib 20 (PNG SUPPORT)
+at GO GRAPHSUP. If you can't find it in any of those places,
+e-mail me, and I'll help you find it.
+
+If you have any code changes, requests, problems, etc., please e-mail
+them to me. Also, I'd appreciate any make files or project files,
+and any modifications you needed to make to get libpng to compile,
+along with a #define variable to tell what compiler/system you are on.
+If you needed to add transformations to libpng, or wish libpng would
+provide the image in a different way, drop me a note (and code, if
+possible), so I can consider supporting the transformation.
+Finally, if you get any warning messages when compiling libpng
+(note: not zlib), and they are easy to fix, I'd appreciate the
+fix. Please mention "libpng" somewhere in the subject line. Thanks.
+
+This release was created and will be supported by myself (of course
+based in a large way on Guy's and Andreas' earlier work), and the PNG
+development group.
+
+Send comments/corrections/commendations to png-mng-implement at
+lists.sourceforge.net (subscription required; visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe) or to glennrp at users.sourceforge.net
+
+You can't reach Guy, the original libpng author, at the addresses
+given in previous versions of this document. He and Andreas will
+read mail addressed to the png-implement list, however.
+
+Please do not send general questions about PNG. Send them to
+the (png-list at ccrc.wustl.edu, subscription required, write to
+majordomo at ccrc.wustl.edu with "subscribe png-list" in your message).
+On the other hand,
+please do not send libpng questions to that address, send them to me
+or to the png-implement list. I'll
+get them in the end anyway. If you have a question about something
+in the PNG specification that is related to using libpng, send it
+to me. Send me any questions that start with "I was using libpng,
+and ...". If in doubt, send questions to me. I'll bounce them
+to others, if necessary.
+
+Please do not send suggestions on how to change PNG. We have
+been discussing PNG for nine years now, and it is official and
+finished. If you have suggestions for libpng, however, I'll
+gladly listen. Even if your suggestion is not used immediately,
+it may be used later.
+
+Files in this distribution:
+
+ ANNOUNCE => Announcement of this version, with recent changes
+ CHANGES => Description of changes between libpng versions
+ KNOWNBUG => List of known bugs and deficiencies
+ LICENSE => License to use and redistribute libpng
+ README => This file
+ TODO => Things not implemented in the current library
+ Y2KINFO => Statement of Y2K compliance
+ example.c => Example code for using libpng functions
+ libpng.3 => manual page for libpng (includes libpng-manual.txt)
+ libpng-manual.txt => Description of libpng and its functions
+ libpngpf.3 => manual page for libpng's private functions
+ png.5 => manual page for the PNG format
+ png.c => Basic interface functions common to library
+ png.h => Library function and interface declarations (public)
+ pngpriv.h => Library function and interface declarations (private)
+ pngconf.h => System specific library configuration (public)
+ pngstruct.h => png_struct declaration (private)
+ pnginfo.h => png_info struct declaration (private)
+ pngdebug.h => debugging macros (private)
+ pngerror.c => Error/warning message I/O functions
+ pngget.c => Functions for retrieving info from struct
+ pngmem.c => Memory handling functions
+ pngbar.png => PNG logo, 88x31
+ pngnow.png => PNG logo, 98x31
+ pngpread.c => Progressive reading functions
+ pngread.c => Read data/helper high-level functions
+ pngrio.c => Lowest-level data read I/O functions
+ pngrtran.c => Read data transformation functions
+ pngrutil.c => Read data utility functions
+ pngset.c => Functions for storing data into the info_struct
+ pngtest.c => Library test program
+ pngtest.png => Library test sample image
+ pngtrans.c => Common data transformation functions
+ pngwio.c => Lowest-level write I/O functions
+ pngwrite.c => High-level write functions
+ pngwtran.c => Write data transformations
+ pngwutil.c => Write utility functions
+ contrib => Contributions
+ gregbook => source code for PNG reading and writing, from
+ Greg Roelofs' "PNG: The Definitive Guide",
+ O'Reilly, 1999
+ msvctest => Builds and runs pngtest using a MSVC workspace
+ pngminus => Simple pnm2png and png2pnm programs
+ pngsuite => Test images
+ visupng => Contains a MSVC workspace for VisualPng
+ projects => Contains project files and workspaces for
+ building a DLL
+ cbuilder5 => Contains a Borland workspace for building
+ libpng and zlib
+ visualc6 => Contains a Microsoft Visual C++ (MSVC)
+ workspace for building libpng and zlib
+ visualc71 => Contains a Microsoft Visual C++ (MSVC)
+ workspace for building libpng and zlib
+ xcode => Contains an Apple xcode
+ workspace for building libpng and zlib
+ scripts => Directory containing scripts for building libpng:
+ (see scripts/README.txt for the list of scripts)
+
+Good luck, and happy coding.
+
+-Glenn Randers-Pehrson (current maintainer, since 1998)
+ Internet: glennrp at users.sourceforge.net
+
+-Andreas Eric Dilger (former maintainer, 1996-1997)
+ Internet: adilger at enel.ucalgary.ca
+ Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
+
+-Guy Eric Schalnat (original author and former maintainer, 1995-1996)
+ (formerly of Group 42, Inc)
+ Internet: gschal at infinet.com
--- /dev/null
+/*
+TODO - list of things to do for libpng:
+
+Final bug fixes.
+Better C++ wrapper/full C++ implementation?
+Fix problem with C++ and EXTERN "C".
+cHRM transformation.
+Remove setjmp/longjmp usage in favor of returning error codes.
+Add "grayscale->palette" transformation and "palette->grayscale" detection.
+Improved dithering.
+Multi-lingual error and warning message support.
+Complete sRGB transformation (presently it simply uses gamma=0.45455).
+Man pages for function calls.
+Better documentation.
+Better filter selection
+ (counting huffman bits/precompression? filter inertia? filter costs?).
+Histogram creation.
+Text conversion between different code pages (Latin-1 -> Mac and DOS).
+Avoid building gamma tables whenever possible.
+Use greater precision when changing to linear gamma for compositing against
+ background and doing rgb-to-gray transformation.
+Investigate pre-incremented loop counters and other loop constructions.
+Add interpolated method of handling interlacing.
+Switch to the simpler zlib (zlib/libpng) license if legally possible.
+Extend pngvalid.c to validate more of the libpng transformations.
+
+*/
--- /dev/null
+libpng.txt - A description on how to use and modify libpng
+
+ libpng version 1.4.4 - September 23, 2010
+ Updated and distributed by Glenn Randers-Pehrson
+ <glennrp at users.sourceforge.net>
+ Copyright (c) 1998-2010 Glenn Randers-Pehrson
+
+ This document is released under the libpng license.
+ For conditions of distribution and use, see the disclaimer
+ and license in png.h
+
+ Based on:
+
+ libpng versions 0.97, January 1998, through 1.4.4 - September 23, 2010
+ Updated and distributed by Glenn Randers-Pehrson
+ Copyright (c) 1998-2010 Glenn Randers-Pehrson
+
+ libpng 1.0 beta 6 version 0.96 May 28, 1997
+ Updated and distributed by Andreas Dilger
+ Copyright (c) 1996, 1997 Andreas Dilger
+
+ libpng 1.0 beta 2 - version 0.88 January 26, 1996
+ For conditions of distribution and use, see copyright
+ notice in png.h. Copyright (c) 1995, 1996 Guy Eric
+ Schalnat, Group 42, Inc.
+
+ Updated/rewritten per request in the libpng FAQ
+ Copyright (c) 1995, 1996 Frank J. T. Wojcik
+ December 18, 1995 & January 20, 1996
+
+I. Introduction
+
+This file describes how to use and modify the PNG reference library
+(known as libpng) for your own use. There are five sections to this
+file: introduction, structures, reading, writing, and modification and
+configuration notes for various special platforms. In addition to this
+file, example.c is a good starting point for using the library, as
+it is heavily commented and should include everything most people
+will need. We assume that libpng is already installed; see the
+INSTALL file for instructions on how to install libpng.
+
+For examples of libpng usage, see the files "example.c", "pngtest.c",
+and the files in the "contrib" directory, all of which are included in
+the libpng distribution.
+
+Libpng was written as a companion to the PNG specification, as a way
+of reducing the amount of time and effort it takes to support the PNG
+file format in application programs.
+
+The PNG specification (second edition), November 2003, is available as
+a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2003 (E)) at
+<http://www.w3.org/TR/2003/REC-PNG-20031110/
+The W3C and ISO documents have identical technical content.
+
+The PNG-1.2 specification is available at
+<http://www.libpng.org/pub/png/documents/>. It is technically equivalent
+to the PNG specification (second edition) but has some additional material.
+
+The PNG-1.0 specification is available
+as RFC 2083 <http://www.libpng.org/pub/png/documents/> and as a
+W3C Recommendation <http://www.w3.org/TR/REC.png.html>.
+
+Some additional chunks are described in the special-purpose public chunks
+documents at <http://www.libpng.org/pub/png/documents/>.
+
+Other information
+about PNG, and the latest version of libpng, can be found at the PNG home
+page, <http://www.libpng.org/pub/png/>.
+
+Most users will not have to modify the library significantly; advanced
+users may want to modify it more. All attempts were made to make it as
+complete as possible, while keeping the code easy to understand.
+Currently, this library only supports C. Support for other languages
+is being considered.
+
+Libpng has been designed to handle multiple sessions at one time,
+to be easily modifiable, to be portable to the vast majority of
+machines (ANSI, K&R, 16-, 32-, and 64-bit) available, and to be easy
+to use. The ultimate goal of libpng is to promote the acceptance of
+the PNG file format in whatever way possible. While there is still
+work to be done (see the TODO file), libpng should cover the
+majority of the needs of its users.
+
+Libpng uses zlib for its compression and decompression of PNG files.
+Further information about zlib, and the latest version of zlib, can
+be found at the zlib home page, <http://www.info-zip.org/pub/infozip/zlib/>.
+The zlib compression utility is a general purpose utility that is
+useful for more than PNG files, and can be used without libpng.
+See the documentation delivered with zlib for more details.
+You can usually find the source files for the zlib utility wherever you
+find the libpng source files.
+
+Libpng is thread safe, provided the threads are using different
+instances of the structures. Each thread should have its own
+png_struct and png_info instances, and thus its own image.
+Libpng does not protect itself against two threads using the
+same instance of a structure.
+
+II. Structures
+
+There are two main structures that are important to libpng, png_struct
+and png_info. The first, png_struct, is an internal structure that
+will not, for the most part, be used by a user except as the first
+variable passed to every libpng function call.
+
+The png_info structure is designed to provide information about the
+PNG file. At one time, the fields of png_info were intended to be
+directly accessible to the user. However, this tended to cause problems
+with applications using dynamically loaded libraries, and as a result
+a set of interface functions for png_info (the png_get_*() and png_set_*()
+functions) was developed. The fields of png_info are still available for
+older applications, but it is suggested that applications use the new
+interfaces if at all possible.
+
+Applications that do make direct access to the members of png_struct (except
+for png_ptr->jmpbuf) must be recompiled whenever the library is updated,
+and applications that make direct access to the members of png_info must
+be recompiled if they were compiled or loaded with libpng version 1.0.6,
+in which the members were in a different order. In version 1.0.7, the
+members of the png_info structure reverted to the old order, as they were
+in versions 0.97c through 1.0.5. Starting with version 2.0.0, both
+structures are going to be hidden, and the contents of the structures will
+only be accessible through the png_get/png_set functions.
+
+The png.h header file is an invaluable reference for programming with libpng.
+And while I'm on the topic, make sure you include the libpng header file:
+
+#include <png.h>
+
+III. Reading
+
+We'll now walk you through the possible functions to call when reading
+in a PNG file sequentially, briefly explaining the syntax and purpose
+of each one. See example.c and png.h for more detail. While
+progressive reading is covered in the next section, you will still
+need some of the functions discussed in this section to read a PNG
+file.
+
+Setup
+
+You will want to do the I/O initialization(*) before you get into libpng,
+so if it doesn't work, you don't have much to undo. Of course, you
+will also want to insure that you are, in fact, dealing with a PNG
+file. Libpng provides a simple check to see if a file is a PNG file.
+To use it, pass in the first 1 to 8 bytes of the file to the function
+png_sig_cmp(), and it will return 0 (false) if the bytes match the
+corresponding bytes of the PNG signature, or nonzero (true) otherwise.
+Of course, the more bytes you pass in, the greater the accuracy of the
+prediction.
+
+If you are intending to keep the file pointer open for use in libpng,
+you must ensure you don't read more than 8 bytes from the beginning
+of the file, and you also have to make a call to png_set_sig_bytes_read()
+with the number of bytes you read from the beginning. Libpng will
+then only check the bytes (if any) that your program didn't read.
+
+(*): If you are not using the standard I/O functions, you will need
+to replace them with custom functions. See the discussion under
+Customizing libpng.
+
+
+ FILE *fp = fopen(file_name, "rb");
+ if (!fp)
+ {
+ return (ERROR);
+ }
+ fread(header, 1, number, fp);
+ is_png = !png_sig_cmp(header, 0, number);
+ if (!is_png)
+ {
+ return (NOT_PNG);
+ }
+
+
+Next, png_struct and png_info need to be allocated and initialized. In
+order to ensure that the size of these structures is correct even with a
+dynamically linked libpng, there are functions to initialize and
+allocate the structures. We also pass the library version, optional
+pointers to error handling functions, and a pointer to a data struct for
+use by the error functions, if necessary (the pointer and functions can
+be NULL if the default error handlers are to be used). See the section
+on Changes to Libpng below regarding the old initialization functions.
+The structure allocation functions quietly return NULL if they fail to
+create the structure, so your application should check for that.
+
+ png_structp png_ptr = png_create_read_struct
+ (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
+ user_error_fn, user_warning_fn);
+ if (!png_ptr)
+ return (ERROR);
+
+ png_infop info_ptr = png_create_info_struct(png_ptr);
+ if (!info_ptr)
+ {
+ png_destroy_read_struct(&png_ptr,
+ (png_infopp)NULL, (png_infopp)NULL);
+ return (ERROR);
+ }
+
+ png_infop end_info = png_create_info_struct(png_ptr);
+ if (!end_info)
+ {
+ png_destroy_read_struct(&png_ptr, &info_ptr,
+ (png_infopp)NULL);
+ return (ERROR);
+ }
+
+If you want to use your own memory allocation routines,
+define PNG_USER_MEM_SUPPORTED and use
+png_create_read_struct_2() instead of png_create_read_struct():
+
+ png_structp png_ptr = png_create_read_struct_2
+ (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
+ user_error_fn, user_warning_fn, (png_voidp)
+ user_mem_ptr, user_malloc_fn, user_free_fn);
+
+The error handling routines passed to png_create_read_struct()
+and the memory alloc/free routines passed to png_create_struct_2()
+are only necessary if you are not using the libpng supplied error
+handling and memory alloc/free functions.
+
+When libpng encounters an error, it expects to longjmp back
+to your routine. Therefore, you will need to call setjmp and pass
+your png_jmpbuf(png_ptr). If you read the file from different
+routines, you will need to update the jmpbuf field every time you enter
+a new routine that will call a png_*() function.
+
+See your documentation of setjmp/longjmp for your compiler for more
+information on setjmp/longjmp. See the discussion on libpng error
+handling in the Customizing Libpng section below for more information
+on the libpng error handling. If an error occurs, and libpng longjmp's
+back to your setjmp, you will want to call png_destroy_read_struct() to
+free any memory.
+
+ if (setjmp(png_jmpbuf(png_ptr)))
+ {
+ png_destroy_read_struct(&png_ptr, &info_ptr,
+ &end_info);
+ fclose(fp);
+ return (ERROR);
+ }
+
+If you would rather avoid the complexity of setjmp/longjmp issues,
+you can compile libpng with PNG_NO_SETJMP, in which case
+errors will result in a call to PNG_ABORT() which defaults to abort().
+
+You can #define PNG_ABORT() to a function that does something
+more useful than abort(), as long as your function does not
+return.
+
+Now you need to set up the input code. The default for libpng is to
+use the C function fread(). If you use this, you will need to pass a
+valid FILE * in the function png_init_io(). Be sure that the file is
+opened in binary mode. If you wish to handle reading data in another
+way, you need not call the png_init_io() function, but you must then
+implement the libpng I/O methods discussed in the Customizing Libpng
+section below.
+
+ png_init_io(png_ptr, fp);
+
+If you had previously opened the file and read any of the signature from
+the beginning in order to see if this was a PNG file, you need to let
+libpng know that there are some bytes missing from the start of the file.
+
+ png_set_sig_bytes(png_ptr, number);
+
+You can change the zlib compression buffer size to be used while
+reading compressed data with
+
+ png_set_compression_buffer_size(png_ptr, buffer_size);
+
+where the default size is 8192 bytes. Note that the buffer size
+is changed immediately and the buffer is reallocated immediately,
+instead of setting a flag to be acted upon later.
+
+Setting up callback code
+
+You can set up a callback function to handle any unknown chunks in the
+input stream. You must supply the function
+
+ read_chunk_callback(png_ptr ptr,
+ png_unknown_chunkp chunk);
+ {
+ /* The unknown chunk structure contains your
+ chunk data, along with similar data for any other
+ unknown chunks: */
+
+ png_byte name[5];
+ png_byte *data;
+ png_size_t size;
+
+ /* Note that libpng has already taken care of
+ the CRC handling */
+
+ /* put your code here. Search for your chunk in the
+ unknown chunk structure, process it, and return one
+ of the following: */
+
+ return (-n); /* chunk had an error */
+ return (0); /* did not recognize */
+ return (n); /* success */
+ }
+
+(You can give your function another name that you like instead of
+"read_chunk_callback")
+
+To inform libpng about your function, use
+
+ png_set_read_user_chunk_fn(png_ptr, user_chunk_ptr,
+ read_chunk_callback);
+
+This names not only the callback function, but also a user pointer that
+you can retrieve with
+
+ png_get_user_chunk_ptr(png_ptr);
+
+If you call the png_set_read_user_chunk_fn() function, then all unknown
+chunks will be saved when read, in case your callback function will need
+one or more of them. This behavior can be changed with the
+png_set_keep_unknown_chunks() function, described below.
+
+At this point, you can set up a callback function that will be
+called after each row has been read, which you can use to control
+a progress meter or the like. It's demonstrated in pngtest.c.
+You must supply a function
+
+ void read_row_callback(png_ptr ptr, png_uint_32 row,
+ int pass);
+ {
+ /* put your code here */
+ }
+
+(You can give it another name that you like instead of "read_row_callback")
+
+To inform libpng about your function, use
+
+ png_set_read_status_fn(png_ptr, read_row_callback);
+
+Unknown-chunk handling
+
+Now you get to set the way the library processes unknown chunks in the
+input PNG stream. Both known and unknown chunks will be read. Normal
+behavior is that known chunks will be parsed into information in
+various info_ptr members while unknown chunks will be discarded. This
+behavior can be wasteful if your application will never use some known
+chunk types. To change this, you can call:
+
+ png_set_keep_unknown_chunks(png_ptr, keep,
+ chunk_list, num_chunks);
+ keep - 0: default unknown chunk handling
+ 1: ignore; do not keep
+ 2: keep only if safe-to-copy
+ 3: keep even if unsafe-to-copy
+ You can use these definitions:
+ PNG_HANDLE_CHUNK_AS_DEFAULT 0
+ PNG_HANDLE_CHUNK_NEVER 1
+ PNG_HANDLE_CHUNK_IF_SAFE 2
+ PNG_HANDLE_CHUNK_ALWAYS 3
+ chunk_list - list of chunks affected (a byte string,
+ five bytes per chunk, NULL or '\0' if
+ num_chunks is 0)
+ num_chunks - number of chunks affected; if 0, all
+ unknown chunks are affected. If nonzero,
+ only the chunks in the list are affected
+
+Unknown chunks declared in this way will be saved as raw data onto a
+list of png_unknown_chunk structures. If a chunk that is normally
+known to libpng is named in the list, it will be handled as unknown,
+according to the "keep" directive. If a chunk is named in successive
+instances of png_set_keep_unknown_chunks(), the final instance will
+take precedence. The IHDR and IEND chunks should not be named in
+chunk_list; if they are, libpng will process them normally anyway.
+
+Here is an example of the usage of png_set_keep_unknown_chunks(),
+where the private "vpAg" chunk will later be processed by a user chunk
+callback function:
+
+ png_byte vpAg[5]={118, 112, 65, 103, (png_byte) '\0'};
+
+ #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+ png_byte unused_chunks[]=
+ {
+ 104, 73, 83, 84, (png_byte) '\0', /* hIST */
+ 105, 84, 88, 116, (png_byte) '\0', /* iTXt */
+ 112, 67, 65, 76, (png_byte) '\0', /* pCAL */
+ 115, 67, 65, 76, (png_byte) '\0', /* sCAL */
+ 115, 80, 76, 84, (png_byte) '\0', /* sPLT */
+ 116, 73, 77, 69, (png_byte) '\0', /* tIME */
+ };
+ #endif
+
+ ...
+
+ #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+ /* ignore all unknown chunks: */
+ png_set_keep_unknown_chunks(read_ptr, 1, NULL, 0);
+ /* except for vpAg: */
+ png_set_keep_unknown_chunks(read_ptr, 2, vpAg, 1);
+ /* also ignore unused known chunks: */
+ png_set_keep_unknown_chunks(read_ptr, 1, unused_chunks,
+ (int)sizeof(unused_chunks)/5);
+ #endif
+
+User limits
+
+The PNG specification allows the width and height of an image to be as
+large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
+Since very few applications really need to process such large images,
+we have imposed an arbitrary 1-million limit on rows and columns.
+Larger images will be rejected immediately with a png_error() call. If
+you wish to override this limit, you can use
+
+ png_set_user_limits(png_ptr, width_max, height_max);
+
+to set your own limits, or use width_max = height_max = 0x7fffffffL
+to allow all valid dimensions (libpng may reject some very large images
+anyway because of potential buffer overflow conditions).
+
+You should put this statement after you create the PNG structure and
+before calling png_read_info(), png_read_png(), or png_process_data().
+If you need to retrieve the limits that are being applied, use
+
+ width_max = png_get_user_width_max(png_ptr);
+ height_max = png_get_user_height_max(png_ptr);
+
+The PNG specification sets no limit on the number of ancillary chunks
+allowed in a PNG datastream. You can impose a limit on the total number
+of sPLT, tEXt, iTXt, zTXt, and unknown chunks that will be stored, with
+
+ png_set_chunk_cache_max(png_ptr, user_chunk_cache_max);
+
+where 0x7fffffffL means unlimited. You can retrieve this limit with
+
+ chunk_cache_max = png_get_chunk_cache_max(png_ptr);
+
+This limit also applies to the number of buffers that can be allocated
+by png_decompress_chunk() while decompressing iTXt, zTXt, and iCCP chunks.
+
+You can also set a limit on the amount of memory that a compressed chunk
+other than IDAT can occupy, with
+
+ png_set_chunk_malloc_max(png_ptr, user_chunk_malloc_max);
+
+and you can retrieve the limit with
+
+ chunk_malloc_max = png_get_chunk_malloc_max(png_ptr);
+
+Any chunks that would cause either of these limits to be exceeded will
+be ignored.
+
+The high-level read interface
+
+At this point there are two ways to proceed; through the high-level
+read interface, or through a sequence of low-level read operations.
+You can use the high-level interface if (a) you are willing to read
+the entire image into memory, and (b) the input transformations
+you want to do are limited to the following set:
+
+ PNG_TRANSFORM_IDENTITY No transformation
+ PNG_TRANSFORM_STRIP_16 Strip 16-bit samples to
+ 8 bits
+ PNG_TRANSFORM_STRIP_ALPHA Discard the alpha channel
+ PNG_TRANSFORM_PACKING Expand 1, 2 and 4-bit
+ samples to bytes
+ PNG_TRANSFORM_PACKSWAP Change order of packed
+ pixels to LSB first
+ PNG_TRANSFORM_EXPAND Perform set_expand()
+ PNG_TRANSFORM_INVERT_MONO Invert monochrome images
+ PNG_TRANSFORM_SHIFT Normalize pixels to the
+ sBIT depth
+ PNG_TRANSFORM_BGR Flip RGB to BGR, RGBA
+ to BGRA
+ PNG_TRANSFORM_SWAP_ALPHA Flip RGBA to ARGB or GA
+ to AG
+ PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity
+ to transparency
+ PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples
+ PNG_TRANSFORM_GRAY_TO_RGB Expand grayscale samples
+ to RGB (or GA to RGBA)
+
+(This excludes setting a background color, doing gamma transformation,
+quantizing, and setting filler.) If this is the case, simply do this:
+
+ png_read_png(png_ptr, info_ptr, png_transforms, NULL)
+
+where png_transforms is an integer containing the bitwise OR of some
+set of transformation flags. This call is equivalent to png_read_info(),
+followed the set of transformations indicated by the transform mask,
+then png_read_image(), and finally png_read_end().
+
+(The final parameter of this call is not yet used. Someday it might point
+to transformation parameters required by some future input transform.)
+
+You must use png_transforms and not call any png_set_transform() functions
+when you use png_read_png().
+
+After you have called png_read_png(), you can retrieve the image data
+with
+
+ row_pointers = png_get_rows(png_ptr, info_ptr);
+
+where row_pointers is an array of pointers to the pixel data for each row:
+
+ png_bytep row_pointers[height];
+
+If you know your image size and pixel size ahead of time, you can allocate
+row_pointers prior to calling png_read_png() with
+
+ if (height > PNG_UINT_32_MAX/png_sizeof(png_byte))
+ png_error (png_ptr,
+ "Image is too tall to process in memory");
+ if (width > PNG_UINT_32_MAX/pixel_size)
+ png_error (png_ptr,
+ "Image is too wide to process in memory");
+ row_pointers = png_malloc(png_ptr,
+ height*png_sizeof(png_bytep));
+ for (int i=0; i<height, i++)
+ row_pointers[i]=NULL; /* security precaution */
+ for (int i=0; i<height, i++)
+ row_pointers[i]=png_malloc(png_ptr,
+ width*pixel_size);
+ png_set_rows(png_ptr, info_ptr, &row_pointers);
+
+Alternatively you could allocate your image in one big block and define
+row_pointers[i] to point into the proper places in your block.
+
+If you use png_set_rows(), the application is responsible for freeing
+row_pointers (and row_pointers[i], if they were separately allocated).
+
+If you don't allocate row_pointers ahead of time, png_read_png() will
+do it, and it'll be free'ed when you call png_destroy_*().
+
+The low-level read interface
+
+If you are going the low-level route, you are now ready to read all
+the file information up to the actual image data. You do this with a
+call to png_read_info().
+
+ png_read_info(png_ptr, info_ptr);
+
+This will process all chunks up to but not including the image data.
+
+Querying the info structure
+
+Functions are used to get the information from the info_ptr once it
+has been read. Note that these fields may not be completely filled
+in until png_read_end() has read the chunk data following the image.
+
+ png_get_IHDR(png_ptr, info_ptr, &width, &height,
+ &bit_depth, &color_type, &interlace_type,
+ &compression_type, &filter_method);
+
+ width - holds the width of the image
+ in pixels (up to 2^31).
+ height - holds the height of the image
+ in pixels (up to 2^31).
+ bit_depth - holds the bit depth of one of the
+ image channels. (valid values are
+ 1, 2, 4, 8, 16 and depend also on
+ the color_type. See also
+ significant bits (sBIT) below).
+ color_type - describes which color/alpha channels
+ are present.
+ PNG_COLOR_TYPE_GRAY
+ (bit depths 1, 2, 4, 8, 16)
+ PNG_COLOR_TYPE_GRAY_ALPHA
+ (bit depths 8, 16)
+ PNG_COLOR_TYPE_PALETTE
+ (bit depths 1, 2, 4, 8)
+ PNG_COLOR_TYPE_RGB
+ (bit_depths 8, 16)
+ PNG_COLOR_TYPE_RGB_ALPHA
+ (bit_depths 8, 16)
+
+ PNG_COLOR_MASK_PALETTE
+ PNG_COLOR_MASK_COLOR
+ PNG_COLOR_MASK_ALPHA
+
+ filter_method - (must be PNG_FILTER_TYPE_BASE
+ for PNG 1.0, and can also be
+ PNG_INTRAPIXEL_DIFFERENCING if
+ the PNG datastream is embedded in
+ a MNG-1.0 datastream)
+ compression_type - (must be PNG_COMPRESSION_TYPE_BASE
+ for PNG 1.0)
+ interlace_type - (PNG_INTERLACE_NONE or
+ PNG_INTERLACE_ADAM7)
+
+ Any or all of interlace_type, compression_type, or
+ filter_method can be NULL if you are
+ not interested in their values.
+
+ Note that png_get_IHDR() returns 32-bit data into
+ the application's width and height variables.
+ This is an unsafe situation if these are 16-bit
+ variables. In such situations, the
+ png_get_image_width() and png_get_image_height()
+ functions described below are safer.
+
+ width = png_get_image_width(png_ptr,
+ info_ptr);
+ height = png_get_image_height(png_ptr,
+ info_ptr);
+ bit_depth = png_get_bit_depth(png_ptr,
+ info_ptr);
+ color_type = png_get_color_type(png_ptr,
+ info_ptr);
+ filter_method = png_get_filter_type(png_ptr,
+ info_ptr);
+ compression_type = png_get_compression_type(png_ptr,
+ info_ptr);
+ interlace_type = png_get_interlace_type(png_ptr,
+ info_ptr);
+
+ channels = png_get_channels(png_ptr, info_ptr);
+ channels - number of channels of info for the
+ color type (valid values are 1 (GRAY,
+ PALETTE), 2 (GRAY_ALPHA), 3 (RGB),
+ 4 (RGB_ALPHA or RGB + filler byte))
+ rowbytes = png_get_rowbytes(png_ptr, info_ptr);
+ rowbytes - number of bytes needed to hold a row
+
+ signature = png_get_signature(png_ptr, info_ptr);
+ signature - holds the signature read from the
+ file (if any). The data is kept in
+ the same offset it would be if the
+ whole signature were read (i.e. if an
+ application had already read in 4
+ bytes of signature before starting
+ libpng, the remaining 4 bytes would
+ be in signature[4] through signature[7]
+ (see png_set_sig_bytes())).
+
+These are also important, but their validity depends on whether the chunk
+has been read. The png_get_valid(png_ptr, info_ptr, PNG_INFO_<chunk>) and
+png_get_<chunk>(png_ptr, info_ptr, ...) functions return non-zero if the
+data has been read, or zero if it is missing. The parameters to the
+png_get_<chunk> are set directly if they are simple data types, or a
+pointer into the info_ptr is returned for any complex types.
+
+ png_get_PLTE(png_ptr, info_ptr, &palette,
+ &num_palette);
+ palette - the palette for the file
+ (array of png_color)
+ num_palette - number of entries in the palette
+
+ png_get_gAMA(png_ptr, info_ptr, &gamma);
+ gamma - the gamma the file is written
+ at (PNG_INFO_gAMA)
+
+ png_get_sRGB(png_ptr, info_ptr, &srgb_intent);
+ srgb_intent - the rendering intent (PNG_INFO_sRGB)
+ The presence of the sRGB chunk
+ means that the pixel data is in the
+ sRGB color space. This chunk also
+ implies specific values of gAMA and
+ cHRM.
+
+ png_get_iCCP(png_ptr, info_ptr, &name,
+ &compression_type, &profile, &proflen);
+ name - The profile name.
+ compression - The compression type; always
+ PNG_COMPRESSION_TYPE_BASE for PNG 1.0.
+ You may give NULL to this argument to
+ ignore it.
+ profile - International Color Consortium color
+ profile data. May contain NULs.
+ proflen - length of profile data in bytes.
+
+ png_get_sBIT(png_ptr, info_ptr, &sig_bit);
+ sig_bit - the number of significant bits for
+ (PNG_INFO_sBIT) each of the gray,
+ red, green, and blue channels,
+ whichever are appropriate for the
+ given color type (png_color_16)
+
+ png_get_tRNS(png_ptr, info_ptr, &trans_alpha,
+ &num_trans, &trans_color);
+ trans_alpha - array of alpha (transparency)
+ entries for palette (PNG_INFO_tRNS)
+ trans_color - graylevel or color sample values of
+ the single transparent color for
+ non-paletted images (PNG_INFO_tRNS)
+ num_trans - number of transparent entries
+ (PNG_INFO_tRNS)
+
+ png_get_hIST(png_ptr, info_ptr, &hist);
+ (PNG_INFO_hIST)
+ hist - histogram of palette (array of
+ png_uint_16)
+
+ png_get_tIME(png_ptr, info_ptr, &mod_time);
+ mod_time - time image was last modified
+ (PNG_VALID_tIME)
+
+ png_get_bKGD(png_ptr, info_ptr, &background);
+ background - background color (PNG_VALID_bKGD)
+ valid 16-bit red, green and blue
+ values, regardless of color_type
+
+ num_comments = png_get_text(png_ptr, info_ptr,
+ &text_ptr, &num_text);
+ num_comments - number of comments
+ text_ptr - array of png_text holding image
+ comments
+ text_ptr[i].compression - type of compression used
+ on "text" PNG_TEXT_COMPRESSION_NONE
+ PNG_TEXT_COMPRESSION_zTXt
+ PNG_ITXT_COMPRESSION_NONE
+ PNG_ITXT_COMPRESSION_zTXt
+ text_ptr[i].key - keyword for comment. Must contain
+ 1-79 characters.
+ text_ptr[i].text - text comments for current
+ keyword. Can be empty.
+ text_ptr[i].text_length - length of text string,
+ after decompression, 0 for iTXt
+ text_ptr[i].itxt_length - length of itxt string,
+ after decompression, 0 for tEXt/zTXt
+ text_ptr[i].lang - language of comment (empty
+ string for unknown).
+ text_ptr[i].lang_key - keyword in UTF-8
+ (empty string for unknown).
+ Note that the itxt_length, lang, and lang_key
+ members of the text_ptr structure only exist
+ when the library is built with iTXt chunk support.
+
+ num_text - number of comments (same as
+ num_comments; you can put NULL here
+ to avoid the duplication)
+ Note while png_set_text() will accept text, language,
+ and translated keywords that can be NULL pointers, the
+ structure returned by png_get_text will always contain
+ regular zero-terminated C strings. They might be
+ empty strings but they will never be NULL pointers.
+
+ num_spalettes = png_get_sPLT(png_ptr, info_ptr,
+ &palette_ptr);
+ palette_ptr - array of palette structures holding
+ contents of one or more sPLT chunks
+ read.
+ num_spalettes - number of sPLT chunks read.
+
+ png_get_oFFs(png_ptr, info_ptr, &offset_x, &offset_y,
+ &unit_type);
+ offset_x - positive offset from the left edge
+ of the screen
+ offset_y - positive offset from the top edge
+ of the screen
+ unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER
+
+ png_get_pHYs(png_ptr, info_ptr, &res_x, &res_y,
+ &unit_type);
+ res_x - pixels/unit physical resolution in
+ x direction
+ res_y - pixels/unit physical resolution in
+ x direction
+ unit_type - PNG_RESOLUTION_UNKNOWN,
+ PNG_RESOLUTION_METER
+
+ png_get_sCAL(png_ptr, info_ptr, &unit, &width,
+ &height)
+ unit - physical scale units (an integer)
+ width - width of a pixel in physical scale units
+ height - height of a pixel in physical scale units
+ (width and height are doubles)
+
+ png_get_sCAL_s(png_ptr, info_ptr, &unit, &width,
+ &height)
+ unit - physical scale units (an integer)
+ width - width of a pixel in physical scale units
+ height - height of a pixel in physical scale units
+ (width and height are strings like "2.54")
+
+ num_unknown_chunks = png_get_unknown_chunks(png_ptr,
+ info_ptr, &unknowns)
+ unknowns - array of png_unknown_chunk
+ structures holding unknown chunks
+ unknowns[i].name - name of unknown chunk
+ unknowns[i].data - data of unknown chunk
+ unknowns[i].size - size of unknown chunk's data
+ unknowns[i].location - position of chunk in file
+
+ The value of "i" corresponds to the order in which the
+ chunks were read from the PNG file or inserted with the
+ png_set_unknown_chunks() function.
+
+The data from the pHYs chunk can be retrieved in several convenient
+forms:
+
+ res_x = png_get_x_pixels_per_meter(png_ptr,
+ info_ptr)
+ res_y = png_get_y_pixels_per_meter(png_ptr,
+ info_ptr)
+ res_x_and_y = png_get_pixels_per_meter(png_ptr,
+ info_ptr)
+ res_x = png_get_x_pixels_per_inch(png_ptr,
+ info_ptr)
+ res_y = png_get_y_pixels_per_inch(png_ptr,
+ info_ptr)
+ res_x_and_y = png_get_pixels_per_inch(png_ptr,
+ info_ptr)
+ aspect_ratio = png_get_pixel_aspect_ratio(png_ptr,
+ info_ptr)
+
+ (Each of these returns 0 [signifying "unknown"] if
+ the data is not present or if res_x is 0;
+ res_x_and_y is 0 if res_x != res_y)
+
+The data from the oFFs chunk can be retrieved in several convenient
+forms:
+
+ x_offset = png_get_x_offset_microns(png_ptr, info_ptr);
+ y_offset = png_get_y_offset_microns(png_ptr, info_ptr);
+ x_offset = png_get_x_offset_inches(png_ptr, info_ptr);
+ y_offset = png_get_y_offset_inches(png_ptr, info_ptr);
+
+ (Each of these returns 0 [signifying "unknown" if both
+ x and y are 0] if the data is not present or if the
+ chunk is present but the unit is the pixel)
+
+For more information, see the png_info definition in png.h and the
+PNG specification for chunk contents. Be careful with trusting
+rowbytes, as some of the transformations could increase the space
+needed to hold a row (expand, filler, gray_to_rgb, etc.).
+See png_read_update_info(), below.
+
+A quick word about text_ptr and num_text. PNG stores comments in
+keyword/text pairs, one pair per chunk, with no limit on the number
+of text chunks, and a 2^31 byte limit on their size. While there are
+suggested keywords, there is no requirement to restrict the use to these
+strings. It is strongly suggested that keywords and text be sensible
+to humans (that's the point), so don't use abbreviations. Non-printing
+symbols are not allowed. See the PNG specification for more details.
+There is also no requirement to have text after the keyword.
+
+Keywords should be limited to 79 Latin-1 characters without leading or
+trailing spaces, but non-consecutive spaces are allowed within the
+keyword. It is possible to have the same keyword any number of times.
+The text_ptr is an array of png_text structures, each holding a
+pointer to a language string, a pointer to a keyword and a pointer to
+a text string. The text string, language code, and translated
+keyword may be empty or NULL pointers. The keyword/text
+pairs are put into the array in the order that they are received.
+However, some or all of the text chunks may be after the image, so, to
+make sure you have read all the text chunks, don't mess with these
+until after you read the stuff after the image. This will be
+mentioned again below in the discussion that goes with png_read_end().
+
+Input transformations
+
+After you've read the header information, you can set up the library
+to handle any special transformations of the image data. The various
+ways to transform the data will be described in the order that they
+should occur. This is important, as some of these change the color
+type and/or bit depth of the data, and some others only work on
+certain color types and bit depths. Even though each transformation
+checks to see if it has data that it can do something with, you should
+make sure to only enable a transformation if it will be valid for the
+data. For example, don't swap red and blue on grayscale data.
+
+The colors used for the background and transparency values should be
+supplied in the same format/depth as the current image data. They
+are stored in the same format/depth as the image data in a bKGD or tRNS
+chunk, so this is what libpng expects for this data. The colors are
+transformed to keep in sync with the image data when an application
+calls the png_read_update_info() routine (see below).
+
+Data will be decoded into the supplied row buffers packed into bytes
+unless the library has been told to transform it into another format.
+For example, 4 bit/pixel paletted or grayscale data will be returned
+2 pixels/byte with the leftmost pixel in the high-order bits of the
+byte, unless png_set_packing() is called. 8-bit RGB data will be stored
+in RGB RGB RGB format unless png_set_filler() or png_set_add_alpha()
+is called to insert filler bytes, either before or after each RGB triplet.
+16-bit RGB data will be returned RRGGBB RRGGBB, with the most significant
+byte of the color value first, unless png_set_strip_16() is called to
+transform it to regular RGB RGB triplets, or png_set_filler() or
+png_set_add alpha() is called to insert filler bytes, either before or
+after each RRGGBB triplet. Similarly, 8-bit or 16-bit grayscale data can
+be modified with
+png_set_filler(), png_set_add_alpha(), or png_set_strip_16().
+
+The following code transforms grayscale images of less than 8 to 8 bits,
+changes paletted images to RGB, and adds a full alpha channel if there is
+transparency information in a tRNS chunk. This is most useful on
+grayscale images with bit depths of 2 or 4 or if there is a multiple-image
+viewing application that wishes to treat all images in the same way.
+
+ if (color_type == PNG_COLOR_TYPE_PALETTE)
+ png_set_palette_to_rgb(png_ptr);
+
+ if (color_type == PNG_COLOR_TYPE_GRAY &&
+ bit_depth < 8) png_set_expand_gray_1_2_4_to_8(png_ptr);
+
+ if (png_get_valid(png_ptr, info_ptr,
+ PNG_INFO_tRNS)) png_set_tRNS_to_alpha(png_ptr);
+
+These three functions are actually aliases for png_set_expand(), added
+in libpng version 1.0.4, with the function names expanded to improve code
+readability. In some future version they may actually do different
+things.
+
+As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
+added. It expands the sample depth without changing tRNS to alpha.
+
+As of libpng version 1.4.4, not all possible expansions are supported.
+
+In the following table, the 01 means grayscale with depth<8, 31 means
+indexed with depth<8, other numerals represent the color type, "T" means
+the tRNS chunk is present, A means an alpha channel is present, and O
+means tRNS or alpha is present but all pixels in the image are opaque.
+
+ FROM 01 31 0 0T 0O 2 2T 2O 3 3T 3O 4A 4O 6A 6O
+ TO
+ 01 -
+ 31 -
+ 0 1 -
+ 0T -
+ 0O -
+ 2 GX -
+ 2T -
+ 2O -
+ 3 1 -
+ 3T -
+ 3O -
+ 4A T -
+ 4O -
+ 6A GX TX TX -
+ 6O GX TX -
+
+Within the matrix,
+ "-" means the transformation is not supported.
+ "X" means the transformation is obtained by png_set_expand().
+ "1" means the transformation is obtained by
+ png_set_expand_gray_1_2_4_to_8
+ "G" means the transformation is obtained by
+ png_set_gray_to_rgb().
+ "P" means the transformation is obtained by
+ png_set_expand_palette_to_rgb().
+ "T" means the transformation is obtained by
+ png_set_tRNS_to_alpha().
+
+PNG can have files with 16 bits per channel. If you only can handle
+8 bits per channel, this will strip the pixels down to 8 bit.
+
+ if (bit_depth == 16)
+ png_set_strip_16(png_ptr);
+
+If, for some reason, you don't need the alpha channel on an image,
+and you want to remove it rather than combining it with the background
+(but the image author certainly had in mind that you *would* combine
+it with the background, so that's what you should probably do):
+
+ if (color_type & PNG_COLOR_MASK_ALPHA)
+ png_set_strip_alpha(png_ptr);
+
+In PNG files, the alpha channel in an image
+is the level of opacity. If you need the alpha channel in an image to
+be the level of transparency instead of opacity, you can invert the
+alpha channel (or the tRNS chunk data) after it's read, so that 0 is
+fully opaque and 255 (in 8-bit or paletted images) or 65535 (in 16-bit
+images) is fully transparent, with
+
+ png_set_invert_alpha(png_ptr);
+
+PNG files pack pixels of bit depths 1, 2, and 4 into bytes as small as
+they can, resulting in, for example, 8 pixels per byte for 1 bit
+files. This code expands to 1 pixel per byte without changing the
+values of the pixels:
+
+ if (bit_depth < 8)
+ png_set_packing(png_ptr);
+
+PNG files have possible bit depths of 1, 2, 4, 8, and 16. All pixels
+stored in a PNG image have been "scaled" or "shifted" up to the next
+higher possible bit depth (e.g. from 5 bits/sample in the range [0,31]
+to 8 bits/sample in the range [0, 255]). However, it is also possible
+to convert the PNG pixel data back to the original bit depth of the
+image. This call reduces the pixels back down to the original bit depth:
+
+ png_color_8p sig_bit;
+
+ if (png_get_sBIT(png_ptr, info_ptr, &sig_bit))
+ png_set_shift(png_ptr, sig_bit);
+
+PNG files store 3-color pixels in red, green, blue order. This code
+changes the storage of the pixels to blue, green, red:
+
+ if (color_type == PNG_COLOR_TYPE_RGB ||
+ color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ png_set_bgr(png_ptr);
+
+PNG files store RGB pixels packed into 3 or 6 bytes. This code expands them
+into 4 or 8 bytes for windowing systems that need them in this format:
+
+ if (color_type == PNG_COLOR_TYPE_RGB)
+ png_set_filler(png_ptr, filler, PNG_FILLER_BEFORE);
+
+where "filler" is the 8 or 16-bit number to fill with, and the location is
+either PNG_FILLER_BEFORE or PNG_FILLER_AFTER, depending upon whether
+you want the filler before the RGB or after. This transformation
+does not affect images that already have full alpha channels. To add an
+opaque alpha channel, use filler=0xff or 0xffff and PNG_FILLER_AFTER which
+will generate RGBA pixels.
+
+Note that png_set_filler() does not change the color type. If you want
+to do that, you can add a true alpha channel with
+
+ if (color_type == PNG_COLOR_TYPE_RGB ||
+ color_type == PNG_COLOR_TYPE_GRAY)
+ png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER);
+
+where "filler" contains the alpha value to assign to each pixel.
+This function was added in libpng-1.2.7.
+
+If you are reading an image with an alpha channel, and you need the
+data as ARGB instead of the normal PNG format RGBA:
+
+ if (color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ png_set_swap_alpha(png_ptr);
+
+For some uses, you may want a grayscale image to be represented as
+RGB. This code will do that conversion:
+
+ if (color_type == PNG_COLOR_TYPE_GRAY ||
+ color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ png_set_gray_to_rgb(png_ptr);
+
+Conversely, you can convert an RGB or RGBA image to grayscale or grayscale
+with alpha.
+
+ if (color_type == PNG_COLOR_TYPE_RGB ||
+ color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ png_set_rgb_to_gray_fixed(png_ptr, error_action,
+ int red_weight, int green_weight);
+
+ error_action = 1: silently do the conversion
+ error_action = 2: issue a warning if the original
+ image has any pixel where
+ red != green or red != blue
+ error_action = 3: issue an error and abort the
+ conversion if the original
+ image has any pixel where
+ red != green or red != blue
+
+ red_weight: weight of red component times 100000
+ green_weight: weight of green component times 100000
+ If either weight is negative, default
+ weights (21268, 71514) are used.
+
+If you have set error_action = 1 or 2, you can
+later check whether the image really was gray, after processing
+the image rows, with the png_get_rgb_to_gray_status(png_ptr) function.
+It will return a png_byte that is zero if the image was gray or
+1 if there were any non-gray pixels. bKGD and sBIT data
+will be silently converted to grayscale, using the green channel
+data, regardless of the error_action setting.
+
+With red_weight+green_weight<=100000,
+the normalized graylevel is computed:
+
+ int rw = red_weight * 65536;
+ int gw = green_weight * 65536;
+ int bw = 65536 - (rw + gw);
+ gray = (rw*red + gw*green + bw*blue)/65536;
+
+The default values approximate those recommended in the Charles
+Poynton's Color FAQ, <http://www.inforamp.net/~poynton/>
+Copyright (c) 1998-01-04 Charles Poynton <poynton at inforamp.net>
+
+ Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
+
+Libpng approximates this with
+
+ Y = 0.21268 * R + 0.7151 * G + 0.07217 * B
+
+which can be expressed with integers as
+
+ Y = (6969 * R + 23434 * G + 2365 * B)/32768
+
+The calculation is done in a linear colorspace, if the image gamma
+is known.
+
+If you have a grayscale and you are using png_set_expand_depth(),
+png_set_expand(), or png_set_gray_to_rgb to change to truecolor or to
+a higher bit-depth, you must either supply the background color as a gray
+value at the original file bit-depth (need_expand = 1) or else supply the
+background color as an RGB triplet at the final, expanded bit depth
+(need_expand = 0). Similarly, if you are reading a paletted image, you
+must either supply the background color as a palette index (need_expand = 1)
+or as an RGB triplet that may or may not be in the palette (need_expand = 0).
+
+ png_color_16 my_background;
+ png_color_16p image_background;
+
+ if (png_get_bKGD(png_ptr, info_ptr, &image_background))
+ png_set_background(png_ptr, image_background,
+ PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
+ else
+ png_set_background(png_ptr, &my_background,
+ PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
+
+The png_set_background() function tells libpng to composite images
+with alpha or simple transparency against the supplied background
+color. If the PNG file contains a bKGD chunk (PNG_INFO_bKGD valid),
+you may use this color, or supply another color more suitable for
+the current display (e.g., the background color from a web page). You
+need to tell libpng whether the color is in the gamma space of the
+display (PNG_BACKGROUND_GAMMA_SCREEN for colors you supply), the file
+(PNG_BACKGROUND_GAMMA_FILE for colors from the bKGD chunk), or one
+that is neither of these gammas (PNG_BACKGROUND_GAMMA_UNIQUE - I don't
+know why anyone would use this, but it's here).
+
+To properly display PNG images on any kind of system, the application needs
+to know what the display gamma is. Ideally, the user will know this, and
+the application will allow them to set it. One method of allowing the user
+to set the display gamma separately for each system is to check for a
+SCREEN_GAMMA or DISPLAY_GAMMA environment variable, which will hopefully be
+correctly set.
+
+Note that display_gamma is the overall gamma correction required to produce
+pleasing results, which depends on the lighting conditions in the surrounding
+environment. In a dim or brightly lit room, no compensation other than
+the physical gamma exponent of the monitor is needed, while in a dark room
+a slightly smaller exponent is better.
+
+ double gamma, screen_gamma;
+
+ if (/* We have a user-defined screen
+ gamma value */)
+ {
+ screen_gamma = user_defined_screen_gamma;
+ }
+ /* One way that applications can share the same
+ screen gamma value */
+ else if ((gamma_str = getenv("SCREEN_GAMMA"))
+ != NULL)
+ {
+ screen_gamma = (double)atof(gamma_str);
+ }
+ /* If we don't have another value */
+ else
+ {
+ screen_gamma = 2.2; /* A good guess for a
+ PC monitor in a bright office or a dim room */
+ screen_gamma = 2.0; /* A good guess for a
+ PC monitor in a dark room */
+ screen_gamma = 1.7 or 1.0; /* A good
+ guess for Mac systems */
+ }
+
+The png_set_gamma() function handles gamma transformations of the data.
+Pass both the file gamma and the current screen_gamma. If the file does
+not have a gamma value, you can pass one anyway if you have an idea what
+it is (usually 0.45455 is a good guess for GIF images on PCs). Note
+that file gammas are inverted from screen gammas. See the discussions
+on gamma in the PNG specification for an excellent description of what
+gamma is, and why all applications should support it. It is strongly
+recommended that PNG viewers support gamma correction.
+
+ if (png_get_gAMA(png_ptr, info_ptr, &gamma))
+ png_set_gamma(png_ptr, screen_gamma, gamma);
+ else
+ png_set_gamma(png_ptr, screen_gamma, 0.45455);
+
+If you need to reduce an RGB file to a paletted file, or if a paletted
+file has more entries then will fit on your screen, png_set_quantize()
+will do that. Note that this is a simple match dither that merely
+finds the closest color available. This should work fairly well with
+optimized palettes, and fairly badly with linear color cubes. If you
+pass a palette that is larger then maximum_colors, the file will
+reduce the number of colors in the palette so it will fit into
+maximum_colors. If there is a histogram, it will use it to make
+more intelligent choices when reducing the palette. If there is no
+histogram, it may not do as good a job.
+
+ if (color_type & PNG_COLOR_MASK_COLOR)
+ {
+ if (png_get_valid(png_ptr, info_ptr,
+ PNG_INFO_PLTE))
+ {
+ png_uint_16p histogram = NULL;
+
+ png_get_hIST(png_ptr, info_ptr,
+ &histogram);
+ png_set_quantize(png_ptr, palette, num_palette,
+ max_screen_colors, histogram, 1);
+ }
+ else
+ {
+ png_color std_color_cube[MAX_SCREEN_COLORS] =
+ { ... colors ... };
+
+ png_set_quantize(png_ptr, std_color_cube,
+ MAX_SCREEN_COLORS, MAX_SCREEN_COLORS,
+ NULL,0);
+ }
+ }
+
+PNG files describe monochrome as black being zero and white being one.
+The following code will reverse this (make black be one and white be
+zero):
+
+ if (bit_depth == 1 && color_type == PNG_COLOR_TYPE_GRAY)
+ png_set_invert_mono(png_ptr);
+
+This function can also be used to invert grayscale and gray-alpha images:
+
+ if (color_type == PNG_COLOR_TYPE_GRAY ||
+ color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ png_set_invert_mono(png_ptr);
+
+PNG files store 16 bit pixels in network byte order (big-endian,
+ie. most significant bits first). This code changes the storage to the
+other way (little-endian, i.e. least significant bits first, the
+way PCs store them):
+
+ if (bit_depth == 16)
+ png_set_swap(png_ptr);
+
+If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you
+need to change the order the pixels are packed into bytes, you can use:
+
+ if (bit_depth < 8)
+ png_set_packswap(png_ptr);
+
+Finally, you can write your own transformation function if none of
+the existing ones meets your needs. This is done by setting a callback
+with
+
+ png_set_read_user_transform_fn(png_ptr,
+ read_transform_fn);
+
+You must supply the function
+
+ void read_transform_fn(png_ptr ptr, row_info_ptr
+ row_info, png_bytep data)
+
+See pngtest.c for a working example. Your function will be called
+after all of the other transformations have been processed.
+
+You can also set up a pointer to a user structure for use by your
+callback function, and you can inform libpng that your transform
+function will change the number of channels or bit depth with the
+function
+
+ png_set_user_transform_info(png_ptr, user_ptr,
+ user_depth, user_channels);
+
+The user's application, not libpng, is responsible for allocating and
+freeing any memory required for the user structure.
+
+You can retrieve the pointer via the function
+png_get_user_transform_ptr(). For example:
+
+ voidp read_user_transform_ptr =
+ png_get_user_transform_ptr(png_ptr);
+
+The last thing to handle is interlacing; this is covered in detail below,
+but you must call the function here if you want libpng to handle expansion
+of the interlaced image.
+
+ number_of_passes = png_set_interlace_handling(png_ptr);
+
+After setting the transformations, libpng can update your png_info
+structure to reflect any transformations you've requested with this
+call. This is most useful to update the info structure's rowbytes
+field so you can use it to allocate your image memory. This function
+will also update your palette with the correct screen_gamma and
+background if these have been given with the calls above.
+
+ png_read_update_info(png_ptr, info_ptr);
+
+After you call png_read_update_info(), you can allocate any
+memory you need to hold the image. The row data is simply
+raw byte data for all forms of images. As the actual allocation
+varies among applications, no example will be given. If you
+are allocating one large chunk, you will need to build an
+array of pointers to each row, as it will be needed for some
+of the functions below.
+
+Reading image data
+
+After you've allocated memory, you can read the image data.
+The simplest way to do this is in one function call. If you are
+allocating enough memory to hold the whole image, you can just
+call png_read_image() and libpng will read in all the image data
+and put it in the memory area supplied. You will need to pass in
+an array of pointers to each row.
+
+This function automatically handles interlacing, so you don't need
+to call png_set_interlace_handling() or call this function multiple
+times, or any of that other stuff necessary with png_read_rows().
+
+ png_read_image(png_ptr, row_pointers);
+
+where row_pointers is:
+
+ png_bytep row_pointers[height];
+
+You can point to void or char or whatever you use for pixels.
+
+If you don't want to read in the whole image at once, you can
+use png_read_rows() instead. If there is no interlacing (check
+interlace_type == PNG_INTERLACE_NONE), this is simple:
+
+ png_read_rows(png_ptr, row_pointers, NULL,
+ number_of_rows);
+
+where row_pointers is the same as in the png_read_image() call.
+
+If you are doing this just one row at a time, you can do this with
+a single row_pointer instead of an array of row_pointers:
+
+ png_bytep row_pointer = row;
+ png_read_row(png_ptr, row_pointer, NULL);
+
+If the file is interlaced (interlace_type != 0 in the IHDR chunk), things
+get somewhat harder. The only current (PNG Specification version 1.2)
+interlacing type for PNG is (interlace_type == PNG_INTERLACE_ADAM7)
+is a somewhat complicated 2D interlace scheme, known as Adam7, that
+breaks down an image into seven smaller images of varying size, based
+on an 8x8 grid.
+
+libpng can fill out those images or it can give them to you "as is".
+If you want them filled out, there are two ways to do that. The one
+mentioned in the PNG specification is to expand each pixel to cover
+those pixels that have not been read yet (the "rectangle" method).
+This results in a blocky image for the first pass, which gradually
+smooths out as more pixels are read. The other method is the "sparkle"
+method, where pixels are drawn only in their final locations, with the
+rest of the image remaining whatever colors they were initialized to
+before the start of the read. The first method usually looks better,
+but tends to be slower, as there are more pixels to put in the rows.
+
+If you don't want libpng to handle the interlacing details, just call
+png_read_rows() seven times to read in all seven images. Each of the
+images is a valid image by itself, or they can all be combined on an
+8x8 grid to form a single image (although if you intend to combine them
+you would be far better off using the libpng interlace handling).
+
+The first pass will return an image 1/8 as wide as the entire image
+(every 8th column starting in column 0) and 1/8 as high as the original
+(every 8th row starting in row 0), the second will be 1/8 as wide
+(starting in column 4) and 1/8 as high (also starting in row 0). The
+third pass will be 1/4 as wide (every 4th pixel starting in column 0) and
+1/8 as high (every 8th row starting in row 4), and the fourth pass will
+be 1/4 as wide and 1/4 as high (every 4th column starting in column 2,
+and every 4th row starting in row 0). The fifth pass will return an
+image 1/2 as wide, and 1/4 as high (starting at column 0 and row 2),
+while the sixth pass will be 1/2 as wide and 1/2 as high as the original
+(starting in column 1 and row 0). The seventh and final pass will be as
+wide as the original, and 1/2 as high, containing all of the odd
+numbered scanlines. Phew!
+
+If you want libpng to expand the images, call this before calling
+png_start_read_image() or png_read_update_info():
+
+ if (interlace_type == PNG_INTERLACE_ADAM7)
+ number_of_passes
+ = png_set_interlace_handling(png_ptr);
+
+This will return the number of passes needed. Currently, this
+is seven, but may change if another interlace type is added.
+This function can be called even if the file is not interlaced,
+where it will return one pass.
+
+If you are not going to display the image after each pass, but are
+going to wait until the entire image is read in, use the sparkle
+effect. This effect is faster and the end result of either method
+is exactly the same. If you are planning on displaying the image
+after each pass, the "rectangle" effect is generally considered the
+better looking one.
+
+If you only want the "sparkle" effect, just call png_read_rows() as
+normal, with the third parameter NULL. Make sure you make pass over
+the image number_of_passes times, and you don't change the data in the
+rows between calls. You can change the locations of the data, just
+not the data. Each pass only writes the pixels appropriate for that
+pass, and assumes the data from previous passes is still valid.
+
+ png_read_rows(png_ptr, row_pointers, NULL,
+ number_of_rows);
+
+If you only want the first effect (the rectangles), do the same as
+before except pass the row buffer in the third parameter, and leave
+the second parameter NULL.
+
+ png_read_rows(png_ptr, NULL, row_pointers,
+ number_of_rows);
+
+Finishing a sequential read
+
+After you are finished reading the image through the
+low-level interface, you can finish reading the file. If you are
+interested in comments or time, which may be stored either before or
+after the image data, you should pass the separate png_info struct if
+you want to keep the comments from before and after the image
+separate. If you are not interested, you can pass NULL.
+
+ png_read_end(png_ptr, end_info);
+
+When you are done, you can free all memory allocated by libpng like this:
+
+ png_destroy_read_struct(&png_ptr, &info_ptr,
+ &end_info);
+
+It is also possible to individually free the info_ptr members that
+point to libpng-allocated storage with the following function:
+
+ png_free_data(png_ptr, info_ptr, mask, seq)
+ mask - identifies data to be freed, a mask
+ containing the bitwise OR of one or
+ more of
+ PNG_FREE_PLTE, PNG_FREE_TRNS,
+ PNG_FREE_HIST, PNG_FREE_ICCP,
+ PNG_FREE_PCAL, PNG_FREE_ROWS,
+ PNG_FREE_SCAL, PNG_FREE_SPLT,
+ PNG_FREE_TEXT, PNG_FREE_UNKN,
+ or simply PNG_FREE_ALL
+ seq - sequence number of item to be freed
+ (-1 for all items)
+
+This function may be safely called when the relevant storage has
+already been freed, or has not yet been allocated, or was allocated
+by the user and not by libpng, and will in those cases do nothing.
+The "seq" parameter is ignored if only one item of the selected data
+type, such as PLTE, is allowed. If "seq" is not -1, and multiple items
+are allowed for the data type identified in the mask, such as text or
+sPLT, only the n'th item in the structure is freed, where n is "seq".
+
+The default behavior is only to free data that was allocated internally
+by libpng. This can be changed, so that libpng will not free the data,
+or so that it will free data that was allocated by the user with png_malloc()
+or png_zalloc() and passed in via a png_set_*() function, with
+
+ png_data_freer(png_ptr, info_ptr, freer, mask)
+ mask - which data elements are affected
+ same choices as in png_free_data()
+ freer - one of
+ PNG_DESTROY_WILL_FREE_DATA
+ PNG_SET_WILL_FREE_DATA
+ PNG_USER_WILL_FREE_DATA
+
+This function only affects data that has already been allocated.
+You can call this function after reading the PNG data but before calling
+any png_set_*() functions, to control whether the user or the png_set_*()
+function is responsible for freeing any existing data that might be present,
+and again after the png_set_*() functions to control whether the user
+or png_destroy_*() is supposed to free the data. When the user assumes
+responsibility for libpng-allocated data, the application must use
+png_free() to free it, and when the user transfers responsibility to libpng
+for data that the user has allocated, the user must have used png_malloc()
+or png_zalloc() to allocate it.
+
+If you allocated your row_pointers in a single block, as suggested above in
+the description of the high level read interface, you must not transfer
+responsibility for freeing it to the png_set_rows or png_read_destroy function,
+because they would also try to free the individual row_pointers[i].
+
+If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword
+separately, do not transfer responsibility for freeing text_ptr to libpng,
+because when libpng fills a png_text structure it combines these members with
+the key member, and png_free_data() will free only text_ptr.key. Similarly,
+if you transfer responsibility for free'ing text_ptr from libpng to your
+application, your application must not separately free those members.
+
+The png_free_data() function will turn off the "valid" flag for anything
+it frees. If you need to turn the flag off for a chunk that was freed by
+your application instead of by libpng, you can use
+
+ png_set_invalid(png_ptr, info_ptr, mask);
+ mask - identifies the chunks to be made invalid,
+ containing the bitwise OR of one or
+ more of
+ PNG_INFO_gAMA, PNG_INFO_sBIT,
+ PNG_INFO_cHRM, PNG_INFO_PLTE,
+ PNG_INFO_tRNS, PNG_INFO_bKGD,
+ PNG_INFO_hIST, PNG_INFO_pHYs,
+ PNG_INFO_oFFs, PNG_INFO_tIME,
+ PNG_INFO_pCAL, PNG_INFO_sRGB,
+ PNG_INFO_iCCP, PNG_INFO_sPLT,
+ PNG_INFO_sCAL, PNG_INFO_IDAT
+
+For a more compact example of reading a PNG image, see the file example.c.
+
+Reading PNG files progressively
+
+The progressive reader is slightly different then the non-progressive
+reader. Instead of calling png_read_info(), png_read_rows(), and
+png_read_end(), you make one call to png_process_data(), which calls
+callbacks when it has the info, a row, or the end of the image. You
+set up these callbacks with png_set_progressive_read_fn(). You don't
+have to worry about the input/output functions of libpng, as you are
+giving the library the data directly in png_process_data(). I will
+assume that you have read the section on reading PNG files above,
+so I will only highlight the differences (although I will show
+all of the code).
+
+png_structp png_ptr;
+png_infop info_ptr;
+
+ /* An example code fragment of how you would
+ initialize the progressive reader in your
+ application. */
+ int
+ initialize_png_reader()
+ {
+ png_ptr = png_create_read_struct
+ (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
+ user_error_fn, user_warning_fn);
+ if (!png_ptr)
+ return (ERROR);
+ info_ptr = png_create_info_struct(png_ptr);
+ if (!info_ptr)
+ {
+ png_destroy_read_struct(&png_ptr, (png_infopp)NULL,
+ (png_infopp)NULL);
+ return (ERROR);
+ }
+
+ if (setjmp(png_jmpbuf(png_ptr)))
+ {
+ png_destroy_read_struct(&png_ptr, &info_ptr,
+ (png_infopp)NULL);
+ return (ERROR);
+ }
+
+ /* This one's new. You can provide functions
+ to be called when the header info is valid,
+ when each row is completed, and when the image
+ is finished. If you aren't using all functions,
+ you can specify NULL parameters. Even when all
+ three functions are NULL, you need to call
+ png_set_progressive_read_fn(). You can use
+ any struct as the user_ptr (cast to a void pointer
+ for the function call), and retrieve the pointer
+ from inside the callbacks using the function
+
+ png_get_progressive_ptr(png_ptr);
+
+ which will return a void pointer, which you have
+ to cast appropriately.
+ */
+ png_set_progressive_read_fn(png_ptr, (void *)user_ptr,
+ info_callback, row_callback, end_callback);
+
+ return 0;
+ }
+
+ /* A code fragment that you call as you receive blocks
+ of data */
+ int
+ process_data(png_bytep buffer, png_uint_32 length)
+ {
+ if (setjmp(png_jmpbuf(png_ptr)))
+ {
+ png_destroy_read_struct(&png_ptr, &info_ptr,
+ (png_infopp)NULL);
+ return (ERROR);
+ }
+
+ /* This one's new also. Simply give it a chunk
+ of data from the file stream (in order, of
+ course). On machines with segmented memory
+ models machines, don't give it any more than
+ 64K. The library seems to run fine with sizes
+ of 4K. Although you can give it much less if
+ necessary (I assume you can give it chunks of
+ 1 byte, I haven't tried less then 256 bytes
+ yet). When this function returns, you may
+ want to display any rows that were generated
+ in the row callback if you don't already do
+ so there.
+ */
+ png_process_data(png_ptr, info_ptr, buffer, length);
+ return 0;
+ }
+
+ /* This function is called (as set by
+ png_set_progressive_read_fn() above) when enough data
+ has been supplied so all of the header has been
+ read.
+ */
+ void
+ info_callback(png_structp png_ptr, png_infop info)
+ {
+ /* Do any setup here, including setting any of
+ the transformations mentioned in the Reading
+ PNG files section. For now, you _must_ call
+ either png_start_read_image() or
+ png_read_update_info() after all the
+ transformations are set (even if you don't set
+ any). You may start getting rows before
+ png_process_data() returns, so this is your
+ last chance to prepare for that.
+ */
+ }
+
+ /* This function is called when each row of image
+ data is complete */
+ void
+ row_callback(png_structp png_ptr, png_bytep new_row,
+ png_uint_32 row_num, int pass)
+ {
+ /* If the image is interlaced, and you turned
+ on the interlace handler, this function will
+ be called for every row in every pass. Some
+ of these rows will not be changed from the
+ previous pass. When the row is not changed,
+ the new_row variable will be NULL. The rows
+ and passes are called in order, so you don't
+ really need the row_num and pass, but I'm
+ supplying them because it may make your life
+ easier.
+
+ For the non-NULL rows of interlaced images,
+ you must call png_progressive_combine_row()
+ passing in the row and the old row. You can
+ call this function for NULL rows (it will just
+ return) and for non-interlaced images (it just
+ does the memcpy for you) if it will make the
+ code easier. Thus, you can just do this for
+ all cases:
+ */
+
+ png_progressive_combine_row(png_ptr, old_row,
+ new_row);
+
+ /* where old_row is what was displayed for
+ previously for the row. Note that the first
+ pass (pass == 0, really) will completely cover
+ the old row, so the rows do not have to be
+ initialized. After the first pass (and only
+ for interlaced images), you will have to pass
+ the current row, and the function will combine
+ the old row and the new row.
+ */
+ }
+
+ void
+ end_callback(png_structp png_ptr, png_infop info)
+ {
+ /* This function is called after the whole image
+ has been read, including any chunks after the
+ image (up to and including the IEND). You
+ will usually have the same info chunk as you
+ had in the header, although some data may have
+ been added to the comments and time fields.
+
+ Most people won't do much here, perhaps setting
+ a flag that marks the image as finished.
+ */
+ }
+
+
+
+IV. Writing
+
+Much of this is very similar to reading. However, everything of
+importance is repeated here, so you won't have to constantly look
+back up in the reading section to understand writing.
+
+Setup
+
+You will want to do the I/O initialization before you get into libpng,
+so if it doesn't work, you don't have anything to undo. If you are not
+using the standard I/O functions, you will need to replace them with
+custom writing functions. See the discussion under Customizing libpng.
+
+ FILE *fp = fopen(file_name, "wb");
+ if (!fp)
+ {
+ return (ERROR);
+ }
+
+Next, png_struct and png_info need to be allocated and initialized.
+As these can be both relatively large, you may not want to store these
+on the stack, unless you have stack space to spare. Of course, you
+will want to check if they return NULL. If you are also reading,
+you won't want to name your read structure and your write structure
+both "png_ptr"; you can call them anything you like, such as
+"read_ptr" and "write_ptr". Look at pngtest.c, for example.
+
+ png_structp png_ptr = png_create_write_struct
+ (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
+ user_error_fn, user_warning_fn);
+ if (!png_ptr)
+ return (ERROR);
+
+ png_infop info_ptr = png_create_info_struct(png_ptr);
+ if (!info_ptr)
+ {
+ png_destroy_write_struct(&png_ptr,
+ (png_infopp)NULL);
+ return (ERROR);
+ }
+
+If you want to use your own memory allocation routines,
+define PNG_USER_MEM_SUPPORTED and use
+png_create_write_struct_2() instead of png_create_write_struct():
+
+ png_structp png_ptr = png_create_write_struct_2
+ (PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
+ user_error_fn, user_warning_fn, (png_voidp)
+ user_mem_ptr, user_malloc_fn, user_free_fn);
+
+After you have these structures, you will need to set up the
+error handling. When libpng encounters an error, it expects to
+longjmp() back to your routine. Therefore, you will need to call
+setjmp() and pass the png_jmpbuf(png_ptr). If you
+write the file from different routines, you will need to update
+the png_jmpbuf(png_ptr) every time you enter a new routine that will
+call a png_*() function. See your documentation of setjmp/longjmp
+for your compiler for more information on setjmp/longjmp. See
+the discussion on libpng error handling in the Customizing Libpng
+section below for more information on the libpng error handling.
+
+ if (setjmp(png_jmpbuf(png_ptr)))
+ {
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ fclose(fp);
+ return (ERROR);
+ }
+ ...
+ return;
+
+If you would rather avoid the complexity of setjmp/longjmp issues,
+you can compile libpng with PNG_NO_SETJMP, in which case
+errors will result in a call to PNG_ABORT() which defaults to abort().
+
+You can #define PNG_ABORT() to a function that does something
+more useful than abort(), as long as your function does not
+return.
+
+Now you need to set up the output code. The default for libpng is to
+use the C function fwrite(). If you use this, you will need to pass a
+valid FILE * in the function png_init_io(). Be sure that the file is
+opened in binary mode. Again, if you wish to handle writing data in
+another way, see the discussion on libpng I/O handling in the Customizing
+Libpng section below.
+
+ png_init_io(png_ptr, fp);
+
+If you are embedding your PNG into a datastream such as MNG, and don't
+want libpng to write the 8-byte signature, or if you have already
+written the signature in your application, use
+
+ png_set_sig_bytes(png_ptr, 8);
+
+to inform libpng that it should not write a signature.
+
+Write callbacks
+
+At this point, you can set up a callback function that will be
+called after each row has been written, which you can use to control
+a progress meter or the like. It's demonstrated in pngtest.c.
+You must supply a function
+
+ void write_row_callback(png_ptr, png_uint_32 row,
+ int pass);
+ {
+ /* put your code here */
+ }
+
+(You can give it another name that you like instead of "write_row_callback")
+
+To inform libpng about your function, use
+
+ png_set_write_status_fn(png_ptr, write_row_callback);
+
+You now have the option of modifying how the compression library will
+run. The following functions are mainly for testing, but may be useful
+in some cases, like if you need to write PNG files extremely fast and
+are willing to give up some compression, or if you want to get the
+maximum possible compression at the expense of slower writing. If you
+have no special needs in this area, let the library do what it wants by
+not calling this function at all, as it has been tuned to deliver a good
+speed/compression ratio. The second parameter to png_set_filter() is
+the filter method, for which the only valid values are 0 (as of the
+July 1999 PNG specification, version 1.2) or 64 (if you are writing
+a PNG datastream that is to be embedded in a MNG datastream). The third
+parameter is a flag that indicates which filter type(s) are to be tested
+for each scanline. See the PNG specification for details on the specific
+filter types.
+
+
+ /* turn on or off filtering, and/or choose
+ specific filters. You can use either a single
+ PNG_FILTER_VALUE_NAME or the bitwise OR of one
+ or more PNG_FILTER_NAME masks. */
+ png_set_filter(png_ptr, 0,
+ PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE |
+ PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB |
+ PNG_FILTER_UP | PNG_FILTER_VALUE_UP |
+ PNG_FILTER_AVG | PNG_FILTER_VALUE_AVG |
+ PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH|
+ PNG_ALL_FILTERS);
+
+If an application
+wants to start and stop using particular filters during compression,
+it should start out with all of the filters (to ensure that the previous
+row of pixels will be stored in case it's needed later), and then add
+and remove them after the start of compression.
+
+If you are writing a PNG datastream that is to be embedded in a MNG
+datastream, the second parameter can be either 0 or 64.
+
+The png_set_compression_*() functions interface to the zlib compression
+library, and should mostly be ignored unless you really know what you are
+doing. The only generally useful call is png_set_compression_level()
+which changes how much time zlib spends on trying to compress the image
+data. See the Compression Library (zlib.h and algorithm.txt, distributed
+with zlib) for details on the compression levels.
+
+ /* set the zlib compression level */
+ png_set_compression_level(png_ptr,
+ Z_BEST_COMPRESSION);
+
+ /* set other zlib parameters */
+ png_set_compression_mem_level(png_ptr, 8);
+ png_set_compression_strategy(png_ptr,
+ Z_DEFAULT_STRATEGY);
+ png_set_compression_window_bits(png_ptr, 15);
+ png_set_compression_method(png_ptr, 8);
+ png_set_compression_buffer_size(png_ptr, 8192)
+
+extern PNG_EXPORT(void,png_set_zbuf_size)
+
+Setting the contents of info for output
+
+You now need to fill in the png_info structure with all the data you
+wish to write before the actual image. Note that the only thing you
+are allowed to write after the image is the text chunks and the time
+chunk (as of PNG Specification 1.2, anyway). See png_write_end() and
+the latest PNG specification for more information on that. If you
+wish to write them before the image, fill them in now, and flag that
+data as being valid. If you want to wait until after the data, don't
+fill them until png_write_end(). For all the fields in png_info and
+their data types, see png.h. For explanations of what the fields
+contain, see the PNG specification.
+
+Some of the more important parts of the png_info are:
+
+ png_set_IHDR(png_ptr, info_ptr, width, height,
+ bit_depth, color_type, interlace_type,
+ compression_type, filter_method)
+ width - holds the width of the image
+ in pixels (up to 2^31).
+ height - holds the height of the image
+ in pixels (up to 2^31).
+ bit_depth - holds the bit depth of one of the
+ image channels.
+ (valid values are 1, 2, 4, 8, 16
+ and depend also on the
+ color_type. See also significant
+ bits (sBIT) below).
+ color_type - describes which color/alpha
+ channels are present.
+ PNG_COLOR_TYPE_GRAY
+ (bit depths 1, 2, 4, 8, 16)
+ PNG_COLOR_TYPE_GRAY_ALPHA
+ (bit depths 8, 16)
+ PNG_COLOR_TYPE_PALETTE
+ (bit depths 1, 2, 4, 8)
+ PNG_COLOR_TYPE_RGB
+ (bit_depths 8, 16)
+ PNG_COLOR_TYPE_RGB_ALPHA
+ (bit_depths 8, 16)
+
+ PNG_COLOR_MASK_PALETTE
+ PNG_COLOR_MASK_COLOR
+ PNG_COLOR_MASK_ALPHA
+
+ interlace_type - PNG_INTERLACE_NONE or
+ PNG_INTERLACE_ADAM7
+ compression_type - (must be
+ PNG_COMPRESSION_TYPE_DEFAULT)
+ filter_method - (must be PNG_FILTER_TYPE_DEFAULT
+ or, if you are writing a PNG to
+ be embedded in a MNG datastream,
+ can also be
+ PNG_INTRAPIXEL_DIFFERENCING)
+
+If you call png_set_IHDR(), the call must appear before any of the
+other png_set_*() functions, because they might require access to some of
+the IHDR settings. The remaining png_set_*() functions can be called
+in any order.
+
+If you wish, you can reset the compression_type, interlace_type, or
+filter_method later by calling png_set_IHDR() again; if you do this, the
+width, height, bit_depth, and color_type must be the same in each call.
+
+ png_set_PLTE(png_ptr, info_ptr, palette,
+ num_palette);
+ palette - the palette for the file
+ (array of png_color)
+ num_palette - number of entries in the palette
+
+ png_set_gAMA(png_ptr, info_ptr, gamma);
+ gamma - the gamma the image was created
+ at (PNG_INFO_gAMA)
+
+ png_set_sRGB(png_ptr, info_ptr, srgb_intent);
+ srgb_intent - the rendering intent
+ (PNG_INFO_sRGB) The presence of
+ the sRGB chunk means that the pixel
+ data is in the sRGB color space.
+ This chunk also implies specific
+ values of gAMA and cHRM. Rendering
+ intent is the CSS-1 property that
+ has been defined by the International
+ Color Consortium
+ (http://www.color.org).
+ It can be one of
+ PNG_sRGB_INTENT_SATURATION,
+ PNG_sRGB_INTENT_PERCEPTUAL,
+ PNG_sRGB_INTENT_ABSOLUTE, or
+ PNG_sRGB_INTENT_RELATIVE.
+
+
+ png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr,
+ srgb_intent);
+ srgb_intent - the rendering intent
+ (PNG_INFO_sRGB) The presence of the
+ sRGB chunk means that the pixel
+ data is in the sRGB color space.
+ This function also causes gAMA and
+ cHRM chunks with the specific values
+ that are consistent with sRGB to be
+ written.
+
+ png_set_iCCP(png_ptr, info_ptr, name, compression_type,
+ profile, proflen);
+ name - The profile name.
+ compression - The compression type; always
+ PNG_COMPRESSION_TYPE_BASE for PNG 1.0.
+ You may give NULL to this argument to
+ ignore it.
+ profile - International Color Consortium color
+ profile data. May contain NULs.
+ proflen - length of profile data in bytes.
+
+ png_set_sBIT(png_ptr, info_ptr, sig_bit);
+ sig_bit - the number of significant bits for
+ (PNG_INFO_sBIT) each of the gray, red,
+ green, and blue channels, whichever are
+ appropriate for the given color type
+ (png_color_16)
+
+ png_set_tRNS(png_ptr, info_ptr, trans_alpha,
+ num_trans, trans_color);
+ trans_alpha - array of alpha (transparency)
+ entries for palette (PNG_INFO_tRNS)
+ trans_color - graylevel or color sample values
+ (in order red, green, blue) of the
+ single transparent color for
+ non-paletted images (PNG_INFO_tRNS)
+ num_trans - number of transparent entries
+ (PNG_INFO_tRNS)
+
+ png_set_hIST(png_ptr, info_ptr, hist);
+ (PNG_INFO_hIST)
+ hist - histogram of palette (array of
+ png_uint_16)
+
+ png_set_tIME(png_ptr, info_ptr, mod_time);
+ mod_time - time image was last modified
+ (PNG_VALID_tIME)
+
+ png_set_bKGD(png_ptr, info_ptr, background);
+ background - background color (PNG_VALID_bKGD)
+
+ png_set_text(png_ptr, info_ptr, text_ptr, num_text);
+ text_ptr - array of png_text holding image
+ comments
+ text_ptr[i].compression - type of compression used
+ on "text" PNG_TEXT_COMPRESSION_NONE
+ PNG_TEXT_COMPRESSION_zTXt
+ PNG_ITXT_COMPRESSION_NONE
+ PNG_ITXT_COMPRESSION_zTXt
+ text_ptr[i].key - keyword for comment. Must contain
+ 1-79 characters.
+ text_ptr[i].text - text comments for current
+ keyword. Can be NULL or empty.
+ text_ptr[i].text_length - length of text string,
+ after decompression, 0 for iTXt
+ text_ptr[i].itxt_length - length of itxt string,
+ after decompression, 0 for tEXt/zTXt
+ text_ptr[i].lang - language of comment (NULL or
+ empty for unknown).
+ text_ptr[i].translated_keyword - keyword in UTF-8 (NULL
+ or empty for unknown).
+ Note that the itxt_length, lang, and lang_key
+ members of the text_ptr structure only exist
+ when the library is built with iTXt chunk support.
+
+ num_text - number of comments
+
+ png_set_sPLT(png_ptr, info_ptr, &palette_ptr,
+ num_spalettes);
+ palette_ptr - array of png_sPLT_struct structures
+ to be added to the list of palettes
+ in the info structure.
+ num_spalettes - number of palette structures to be
+ added.
+
+ png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y,
+ unit_type);
+ offset_x - positive offset from the left
+ edge of the screen
+ offset_y - positive offset from the top
+ edge of the screen
+ unit_type - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER
+
+ png_set_pHYs(png_ptr, info_ptr, res_x, res_y,
+ unit_type);
+ res_x - pixels/unit physical resolution
+ in x direction
+ res_y - pixels/unit physical resolution
+ in y direction
+ unit_type - PNG_RESOLUTION_UNKNOWN,
+ PNG_RESOLUTION_METER
+
+ png_set_sCAL(png_ptr, info_ptr, unit, width, height)
+ unit - physical scale units (an integer)
+ width - width of a pixel in physical scale units
+ height - height of a pixel in physical scale units
+ (width and height are doubles)
+
+ png_set_sCAL_s(png_ptr, info_ptr, unit, width, height)
+ unit - physical scale units (an integer)
+ width - width of a pixel in physical scale units
+ height - height of a pixel in physical scale units
+ (width and height are strings like "2.54")
+
+ png_set_unknown_chunks(png_ptr, info_ptr, &unknowns,
+ num_unknowns)
+ unknowns - array of png_unknown_chunk
+ structures holding unknown chunks
+ unknowns[i].name - name of unknown chunk
+ unknowns[i].data - data of unknown chunk
+ unknowns[i].size - size of unknown chunk's data
+ unknowns[i].location - position to write chunk in file
+ 0: do not write chunk
+ PNG_HAVE_IHDR: before PLTE
+ PNG_HAVE_PLTE: before IDAT
+ PNG_AFTER_IDAT: after IDAT
+
+The "location" member is set automatically according to
+what part of the output file has already been written.
+You can change its value after calling png_set_unknown_chunks()
+as demonstrated in pngtest.c. Within each of the "locations",
+the chunks are sequenced according to their position in the
+structure (that is, the value of "i", which is the order in which
+the chunk was either read from the input file or defined with
+png_set_unknown_chunks).
+
+A quick word about text and num_text. text is an array of png_text
+structures. num_text is the number of valid structures in the array.
+Each png_text structure holds a language code, a keyword, a text value,
+and a compression type.
+
+The compression types have the same valid numbers as the compression
+types of the image data. Currently, the only valid number is zero.
+However, you can store text either compressed or uncompressed, unlike
+images, which always have to be compressed. So if you don't want the
+text compressed, set the compression type to PNG_TEXT_COMPRESSION_NONE.
+Because tEXt and zTXt chunks don't have a language field, if you
+specify PNG_TEXT_COMPRESSION_NONE or PNG_TEXT_COMPRESSION_zTXt
+any language code or translated keyword will not be written out.
+
+Until text gets around 1000 bytes, it is not worth compressing it.
+After the text has been written out to the file, the compression type
+is set to PNG_TEXT_COMPRESSION_NONE_WR or PNG_TEXT_COMPRESSION_zTXt_WR,
+so that it isn't written out again at the end (in case you are calling
+png_write_end() with the same struct.
+
+The keywords that are given in the PNG Specification are:
+
+ Title Short (one line) title or
+ caption for image
+ Author Name of image's creator
+ Description Description of image (possibly long)
+ Copyright Copyright notice
+ Creation Time Time of original image creation
+ (usually RFC 1123 format, see below)
+ Software Software used to create the image
+ Disclaimer Legal disclaimer
+ Warning Warning of nature of content
+ Source Device used to create the image
+ Comment Miscellaneous comment; conversion
+ from other image format
+
+The keyword-text pairs work like this. Keywords should be short
+simple descriptions of what the comment is about. Some typical
+keywords are found in the PNG specification, as is some recommendations
+on keywords. You can repeat keywords in a file. You can even write
+some text before the image and some after. For example, you may want
+to put a description of the image before the image, but leave the
+disclaimer until after, so viewers working over modem connections
+don't have to wait for the disclaimer to go over the modem before
+they start seeing the image. Finally, keywords should be full
+words, not abbreviations. Keywords and text are in the ISO 8859-1
+(Latin-1) character set (a superset of regular ASCII) and can not
+contain NUL characters, and should not contain control or other
+unprintable characters. To make the comments widely readable, stick
+with basic ASCII, and avoid machine specific character set extensions
+like the IBM-PC character set. The keyword must be present, but
+you can leave off the text string on non-compressed pairs.
+Compressed pairs must have a text string, as only the text string
+is compressed anyway, so the compression would be meaningless.
+
+PNG supports modification time via the png_time structure. Two
+conversion routines are provided, png_convert_from_time_t() for
+time_t and png_convert_from_struct_tm() for struct tm. The
+time_t routine uses gmtime(). You don't have to use either of
+these, but if you wish to fill in the png_time structure directly,
+you should provide the time in universal time (GMT) if possible
+instead of your local time. Note that the year number is the full
+year (e.g. 1998, rather than 98 - PNG is year 2000 compliant!), and
+that months start with 1.
+
+If you want to store the time of the original image creation, you should
+use a plain tEXt chunk with the "Creation Time" keyword. This is
+necessary because the "creation time" of a PNG image is somewhat vague,
+depending on whether you mean the PNG file, the time the image was
+created in a non-PNG format, a still photo from which the image was
+scanned, or possibly the subject matter itself. In order to facilitate
+machine-readable dates, it is recommended that the "Creation Time"
+tEXt chunk use RFC 1123 format dates (e.g. "22 May 1997 18:07:10 GMT"),
+although this isn't a requirement. Unlike the tIME chunk, the
+"Creation Time" tEXt chunk is not expected to be automatically changed
+by the software. To facilitate the use of RFC 1123 dates, a function
+png_convert_to_rfc1123(png_timep) is provided to convert from PNG
+time to an RFC 1123 format string.
+
+Writing unknown chunks
+
+You can use the png_set_unknown_chunks function to queue up chunks
+for writing. You give it a chunk name, raw data, and a size; that's
+all there is to it. The chunks will be written by the next following
+png_write_info_before_PLTE, png_write_info, or png_write_end function.
+Any chunks previously read into the info structure's unknown-chunk
+list will also be written out in a sequence that satisfies the PNG
+specification's ordering rules.
+
+The high-level write interface
+
+At this point there are two ways to proceed; through the high-level
+write interface, or through a sequence of low-level write operations.
+You can use the high-level interface if your image data is present
+in the info structure. All defined output
+transformations are permitted, enabled by the following masks.
+
+ PNG_TRANSFORM_IDENTITY No transformation
+ PNG_TRANSFORM_PACKING Pack 1, 2 and 4-bit samples
+ PNG_TRANSFORM_PACKSWAP Change order of packed
+ pixels to LSB first
+ PNG_TRANSFORM_INVERT_MONO Invert monochrome images
+ PNG_TRANSFORM_SHIFT Normalize pixels to the
+ sBIT depth
+ PNG_TRANSFORM_BGR Flip RGB to BGR, RGBA
+ to BGRA
+ PNG_TRANSFORM_SWAP_ALPHA Flip RGBA to ARGB or GA
+ to AG
+ PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity
+ to transparency
+ PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples
+ PNG_TRANSFORM_STRIP_FILLER Strip out filler
+ bytes (deprecated).
+ PNG_TRANSFORM_STRIP_FILLER_BEFORE Strip out leading
+ filler bytes
+ PNG_TRANSFORM_STRIP_FILLER_AFTER Strip out trailing
+ filler bytes
+
+If you have valid image data in the info structure (you can use
+png_set_rows() to put image data in the info structure), simply do this:
+
+ png_write_png(png_ptr, info_ptr, png_transforms, NULL)
+
+where png_transforms is an integer containing the bitwise OR of some set of
+transformation flags. This call is equivalent to png_write_info(),
+followed the set of transformations indicated by the transform mask,
+then png_write_image(), and finally png_write_end().
+
+(The final parameter of this call is not yet used. Someday it might point
+to transformation parameters required by some future output transform.)
+
+You must use png_transforms and not call any png_set_transform() functions
+when you use png_write_png().
+
+The low-level write interface
+
+If you are going the low-level route instead, you are now ready to
+write all the file information up to the actual image data. You do
+this with a call to png_write_info().
+
+ png_write_info(png_ptr, info_ptr);
+
+Note that there is one transformation you may need to do before
+png_write_info(). In PNG files, the alpha channel in an image is the
+level of opacity. If your data is supplied as a level of transparency,
+you can invert the alpha channel before you write it, so that 0 is
+fully transparent and 255 (in 8-bit or paletted images) or 65535
+(in 16-bit images) is fully opaque, with
+
+ png_set_invert_alpha(png_ptr);
+
+This must appear before png_write_info() instead of later with the
+other transformations because in the case of paletted images the tRNS
+chunk data has to be inverted before the tRNS chunk is written. If
+your image is not a paletted image, the tRNS data (which in such cases
+represents a single color to be rendered as transparent) won't need to
+be changed, and you can safely do this transformation after your
+png_write_info() call.
+
+If you need to write a private chunk that you want to appear before
+the PLTE chunk when PLTE is present, you can write the PNG info in
+two steps, and insert code to write your own chunk between them:
+
+ png_write_info_before_PLTE(png_ptr, info_ptr);
+ png_set_unknown_chunks(png_ptr, info_ptr, ...);
+ png_write_info(png_ptr, info_ptr);
+
+After you've written the file information, you can set up the library
+to handle any special transformations of the image data. The various
+ways to transform the data will be described in the order that they
+should occur. This is important, as some of these change the color
+type and/or bit depth of the data, and some others only work on
+certain color types and bit depths. Even though each transformation
+checks to see if it has data that it can do something with, you should
+make sure to only enable a transformation if it will be valid for the
+data. For example, don't swap red and blue on grayscale data.
+
+PNG files store RGB pixels packed into 3 or 6 bytes. This code tells
+the library to strip input data that has 4 or 8 bytes per pixel down
+to 3 or 6 bytes (or strip 2 or 4-byte grayscale+filler data to 1 or 2
+bytes per pixel).
+
+ png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
+
+where the 0 is unused, and the location is either PNG_FILLER_BEFORE or
+PNG_FILLER_AFTER, depending upon whether the filler byte in the pixel
+is stored XRGB or RGBX.
+
+PNG files pack pixels of bit depths 1, 2, and 4 into bytes as small as
+they can, resulting in, for example, 8 pixels per byte for 1 bit files.
+If the data is supplied at 1 pixel per byte, use this code, which will
+correctly pack the pixels into a single byte:
+
+ png_set_packing(png_ptr);
+
+PNG files reduce possible bit depths to 1, 2, 4, 8, and 16. If your
+data is of another bit depth, you can write an sBIT chunk into the
+file so that decoders can recover the original data if desired.
+
+ /* Set the true bit depth of the image data */
+ if (color_type & PNG_COLOR_MASK_COLOR)
+ {
+ sig_bit.red = true_bit_depth;
+ sig_bit.green = true_bit_depth;
+ sig_bit.blue = true_bit_depth;
+ }
+ else
+ {
+ sig_bit.gray = true_bit_depth;
+ }
+ if (color_type & PNG_COLOR_MASK_ALPHA)
+ {
+ sig_bit.alpha = true_bit_depth;
+ }
+
+ png_set_sBIT(png_ptr, info_ptr, &sig_bit);
+
+If the data is stored in the row buffer in a bit depth other than
+one supported by PNG (e.g. 3 bit data in the range 0-7 for a 4-bit PNG),
+this will scale the values to appear to be the correct bit depth as
+is required by PNG.
+
+ png_set_shift(png_ptr, &sig_bit);
+
+PNG files store 16 bit pixels in network byte order (big-endian,
+ie. most significant bits first). This code would be used if they are
+supplied the other way (little-endian, i.e. least significant bits
+first, the way PCs store them):
+
+ if (bit_depth > 8)
+ png_set_swap(png_ptr);
+
+If you are using packed-pixel images (1, 2, or 4 bits/pixel), and you
+need to change the order the pixels are packed into bytes, you can use:
+
+ if (bit_depth < 8)
+ png_set_packswap(png_ptr);
+
+PNG files store 3 color pixels in red, green, blue order. This code
+would be used if they are supplied as blue, green, red:
+
+ png_set_bgr(png_ptr);
+
+PNG files describe monochrome as black being zero and white being
+one. This code would be used if the pixels are supplied with this reversed
+(black being one and white being zero):
+
+ png_set_invert_mono(png_ptr);
+
+Finally, you can write your own transformation function if none of
+the existing ones meets your needs. This is done by setting a callback
+with
+
+ png_set_write_user_transform_fn(png_ptr,
+ write_transform_fn);
+
+You must supply the function
+
+ void write_transform_fn(png_ptr ptr, row_info_ptr
+ row_info, png_bytep data)
+
+See pngtest.c for a working example. Your function will be called
+before any of the other transformations are processed.
+
+You can also set up a pointer to a user structure for use by your
+callback function.
+
+ png_set_user_transform_info(png_ptr, user_ptr, 0, 0);
+
+The user_channels and user_depth parameters of this function are ignored
+when writing; you can set them to zero as shown.
+
+You can retrieve the pointer via the function png_get_user_transform_ptr().
+For example:
+
+ voidp write_user_transform_ptr =
+ png_get_user_transform_ptr(png_ptr);
+
+It is possible to have libpng flush any pending output, either manually,
+or automatically after a certain number of lines have been written. To
+flush the output stream a single time call:
+
+ png_write_flush(png_ptr);
+
+and to have libpng flush the output stream periodically after a certain
+number of scanlines have been written, call:
+
+ png_set_flush(png_ptr, nrows);
+
+Note that the distance between rows is from the last time png_write_flush()
+was called, or the first row of the image if it has never been called.
+So if you write 50 lines, and then png_set_flush 25, it will flush the
+output on the next scanline, and every 25 lines thereafter, unless
+png_write_flush() is called before 25 more lines have been written.
+If nrows is too small (less than about 10 lines for a 640 pixel wide
+RGB image) the image compression may decrease noticeably (although this
+may be acceptable for real-time applications). Infrequent flushing will
+only degrade the compression performance by a few percent over images
+that do not use flushing.
+
+Writing the image data
+
+That's it for the transformations. Now you can write the image data.
+The simplest way to do this is in one function call. If you have the
+whole image in memory, you can just call png_write_image() and libpng
+will write the image. You will need to pass in an array of pointers to
+each row. This function automatically handles interlacing, so you don't
+need to call png_set_interlace_handling() or call this function multiple
+times, or any of that other stuff necessary with png_write_rows().
+
+ png_write_image(png_ptr, row_pointers);
+
+where row_pointers is:
+
+ png_byte *row_pointers[height];
+
+You can point to void or char or whatever you use for pixels.
+
+If you don't want to write the whole image at once, you can
+use png_write_rows() instead. If the file is not interlaced,
+this is simple:
+
+ png_write_rows(png_ptr, row_pointers,
+ number_of_rows);
+
+row_pointers is the same as in the png_write_image() call.
+
+If you are just writing one row at a time, you can do this with
+a single row_pointer instead of an array of row_pointers:
+
+ png_bytep row_pointer = row;
+
+ png_write_row(png_ptr, row_pointer);
+
+When the file is interlaced, things can get a good deal more complicated.
+The only currently (as of the PNG Specification version 1.2, dated July
+1999) defined interlacing scheme for PNG files is the "Adam7" interlace
+scheme, that breaks down an image into seven smaller images of varying
+size. libpng will build these images for you, or you can do them
+yourself. If you want to build them yourself, see the PNG specification
+for details of which pixels to write when.
+
+If you don't want libpng to handle the interlacing details, just
+use png_set_interlace_handling() and call png_write_rows() the
+correct number of times to write all seven sub-images.
+
+If you want libpng to build the sub-images, call this before you start
+writing any rows:
+
+ number_of_passes =
+ png_set_interlace_handling(png_ptr);
+
+This will return the number of passes needed. Currently, this is seven,
+but may change if another interlace type is added.
+
+Then write the complete image number_of_passes times.
+
+ png_write_rows(png_ptr, row_pointers,
+ number_of_rows);
+
+As some of these rows are not used, and thus return immediately, you may
+want to read about interlacing in the PNG specification, and only update
+the rows that are actually used.
+
+Finishing a sequential write
+
+After you are finished writing the image, you should finish writing
+the file. If you are interested in writing comments or time, you should
+pass an appropriately filled png_info pointer. If you are not interested,
+you can pass NULL.
+
+ png_write_end(png_ptr, info_ptr);
+
+When you are done, you can free all memory used by libpng like this:
+
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+
+It is also possible to individually free the info_ptr members that
+point to libpng-allocated storage with the following function:
+
+ png_free_data(png_ptr, info_ptr, mask, seq)
+ mask - identifies data to be freed, a mask
+ containing the bitwise OR of one or
+ more of
+ PNG_FREE_PLTE, PNG_FREE_TRNS,
+ PNG_FREE_HIST, PNG_FREE_ICCP,
+ PNG_FREE_PCAL, PNG_FREE_ROWS,
+ PNG_FREE_SCAL, PNG_FREE_SPLT,
+ PNG_FREE_TEXT, PNG_FREE_UNKN,
+ or simply PNG_FREE_ALL
+ seq - sequence number of item to be freed
+ (-1 for all items)
+
+This function may be safely called when the relevant storage has
+already been freed, or has not yet been allocated, or was allocated
+by the user and not by libpng, and will in those cases do nothing.
+The "seq" parameter is ignored if only one item of the selected data
+type, such as PLTE, is allowed. If "seq" is not -1, and multiple items
+are allowed for the data type identified in the mask, such as text or
+sPLT, only the n'th item in the structure is freed, where n is "seq".
+
+If you allocated data such as a palette that you passed in to libpng
+with png_set_*, you must not free it until just before the call to
+png_destroy_write_struct().
+
+The default behavior is only to free data that was allocated internally
+by libpng. This can be changed, so that libpng will not free the data,
+or so that it will free data that was allocated by the user with png_malloc()
+or png_zalloc() and passed in via a png_set_*() function, with
+
+ png_data_freer(png_ptr, info_ptr, freer, mask)
+ mask - which data elements are affected
+ same choices as in png_free_data()
+ freer - one of
+ PNG_DESTROY_WILL_FREE_DATA
+ PNG_SET_WILL_FREE_DATA
+ PNG_USER_WILL_FREE_DATA
+
+For example, to transfer responsibility for some data from a read structure
+to a write structure, you could use
+
+ png_data_freer(read_ptr, read_info_ptr,
+ PNG_USER_WILL_FREE_DATA,
+ PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST)
+ png_data_freer(write_ptr, write_info_ptr,
+ PNG_DESTROY_WILL_FREE_DATA,
+ PNG_FREE_PLTE|PNG_FREE_tRNS|PNG_FREE_hIST)
+
+thereby briefly reassigning responsibility for freeing to the user but
+immediately afterwards reassigning it once more to the write_destroy
+function. Having done this, it would then be safe to destroy the read
+structure and continue to use the PLTE, tRNS, and hIST data in the write
+structure.
+
+This function only affects data that has already been allocated.
+You can call this function before calling after the png_set_*() functions
+to control whether the user or png_destroy_*() is supposed to free the data.
+When the user assumes responsibility for libpng-allocated data, the
+application must use
+png_free() to free it, and when the user transfers responsibility to libpng
+for data that the user has allocated, the user must have used png_malloc()
+or png_zalloc() to allocate it.
+
+If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword
+separately, do not transfer responsibility for freeing text_ptr to libpng,
+because when libpng fills a png_text structure it combines these members with
+the key member, and png_free_data() will free only text_ptr.key. Similarly,
+if you transfer responsibility for free'ing text_ptr from libpng to your
+application, your application must not separately free those members.
+For a more compact example of writing a PNG image, see the file example.c.
+
+V. Modifying/Customizing libpng:
+
+There are two issues here. The first is changing how libpng does
+standard things like memory allocation, input/output, and error handling.
+The second deals with more complicated things like adding new chunks,
+adding new transformations, and generally changing how libpng works.
+Both of those are compile-time issues; that is, they are generally
+determined at the time the code is written, and there is rarely a need
+to provide the user with a means of changing them.
+
+Memory allocation, input/output, and error handling
+
+All of the memory allocation, input/output, and error handling in libpng
+goes through callbacks that are user-settable. The default routines are
+in pngmem.c, pngrio.c, pngwio.c, and pngerror.c, respectively. To change
+these functions, call the appropriate png_set_*_fn() function.
+
+Memory allocation is done through the functions png_malloc(), png_calloc(),
+and png_free(). These currently just call the standard C functions.
+png_calloc() calls png_malloc() and then png_memset() to clear the newly
+allocated memory to zero. If your pointers can't access more then 64K
+at a time, you will want to set MAXSEG_64K in zlib.h. Since it is
+unlikely that the method of handling memory allocation on a platform
+will change between applications, these functions must be modified in
+the library at compile time. If you prefer to use a different method
+of allocating and freeing data, you can use png_create_read_struct_2() or
+png_create_write_struct_2() to register your own functions as described
+above. These functions also provide a void pointer that can be retrieved
+via
+
+ mem_ptr=png_get_mem_ptr(png_ptr);
+
+Your replacement memory functions must have prototypes as follows:
+
+ png_voidp malloc_fn(png_structp png_ptr,
+ png_alloc_size_t size);
+ void free_fn(png_structp png_ptr, png_voidp ptr);
+
+Your malloc_fn() must return NULL in case of failure. The png_malloc()
+function will normally call png_error() if it receives a NULL from the
+system memory allocator or from your replacement malloc_fn().
+
+Your free_fn() will never be called with a NULL ptr, since libpng's
+png_free() checks for NULL before calling free_fn().
+
+Input/Output in libpng is done through png_read() and png_write(),
+which currently just call fread() and fwrite(). The FILE * is stored in
+png_struct and is initialized via png_init_io(). If you wish to change
+the method of I/O, the library supplies callbacks that you can set
+through the function png_set_read_fn() and png_set_write_fn() at run
+time, instead of calling the png_init_io() function. These functions
+also provide a void pointer that can be retrieved via the function
+png_get_io_ptr(). For example:
+
+ png_set_read_fn(png_structp read_ptr,
+ voidp read_io_ptr, png_rw_ptr read_data_fn)
+
+ png_set_write_fn(png_structp write_ptr,
+ voidp write_io_ptr, png_rw_ptr write_data_fn,
+ png_flush_ptr output_flush_fn);
+
+ voidp read_io_ptr = png_get_io_ptr(read_ptr);
+ voidp write_io_ptr = png_get_io_ptr(write_ptr);
+
+The replacement I/O functions must have prototypes as follows:
+
+ void user_read_data(png_structp png_ptr,
+ png_bytep data, png_size_t length);
+ void user_write_data(png_structp png_ptr,
+ png_bytep data, png_size_t length);
+ void user_flush_data(png_structp png_ptr);
+
+The user_read_data() function is responsible for detecting and
+handling end-of-data errors.
+
+Supplying NULL for the read, write, or flush functions sets them back
+to using the default C stream functions, which expect the io_ptr to
+point to a standard *FILE structure. It is probably a mistake
+to use NULL for one of write_data_fn and output_flush_fn but not both
+of them, unless you have built libpng with PNG_NO_WRITE_FLUSH defined.
+It is an error to read from a write stream, and vice versa.
+
+Error handling in libpng is done through png_error() and png_warning().
+Errors handled through png_error() are fatal, meaning that png_error()
+should never return to its caller. Currently, this is handled via
+setjmp() and longjmp() (unless you have compiled libpng with
+PNG_NO_SETJMP, in which case it is handled via PNG_ABORT()),
+but you could change this to do things like exit() if you should wish,
+as long as your function does not return.
+
+On non-fatal errors, png_warning() is called
+to print a warning message, and then control returns to the calling code.
+By default png_error() and png_warning() print a message on stderr via
+fprintf() unless the library is compiled with PNG_NO_CONSOLE_IO defined
+(because you don't want the messages) or PNG_NO_STDIO defined (because
+fprintf() isn't available). If you wish to change the behavior of the error
+functions, you will need to set up your own message callbacks. These
+functions are normally supplied at the time that the png_struct is created.
+It is also possible to redirect errors and warnings to your own replacement
+functions after png_create_*_struct() has been called by calling:
+
+ png_set_error_fn(png_structp png_ptr,
+ png_voidp error_ptr, png_error_ptr error_fn,
+ png_error_ptr warning_fn);
+
+ png_voidp error_ptr = png_get_error_ptr(png_ptr);
+
+If NULL is supplied for either error_fn or warning_fn, then the libpng
+default function will be used, calling fprintf() and/or longjmp() if a
+problem is encountered. The replacement error functions should have
+parameters as follows:
+
+ void user_error_fn(png_structp png_ptr,
+ png_const_charp error_msg);
+ void user_warning_fn(png_structp png_ptr,
+ png_const_charp warning_msg);
+
+The motivation behind using setjmp() and longjmp() is the C++ throw and
+catch exception handling methods. This makes the code much easier to write,
+as there is no need to check every return code of every function call.
+However, there are some uncertainties about the status of local variables
+after a longjmp, so the user may want to be careful about doing anything
+after setjmp returns non-zero besides returning itself. Consult your
+compiler documentation for more details. For an alternative approach, you
+may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net).
+
+Custom chunks
+
+If you need to read or write custom chunks, you may need to get deeper
+into the libpng code. The library now has mechanisms for storing
+and writing chunks of unknown type; you can even declare callbacks
+for custom chunks. However, this may not be good enough if the
+library code itself needs to know about interactions between your
+chunk and existing `intrinsic' chunks.
+
+If you need to write a new intrinsic chunk, first read the PNG
+specification. Acquire a first level of understanding of how it works.
+Pay particular attention to the sections that describe chunk names,
+and look at how other chunks were designed, so you can do things
+similarly. Second, check out the sections of libpng that read and
+write chunks. Try to find a chunk that is similar to yours and use
+it as a template. More details can be found in the comments inside
+the code. It is best to handle unknown chunks in a generic method,
+via callback functions, instead of by modifying libpng functions.
+
+If you wish to write your own transformation for the data, look through
+the part of the code that does the transformations, and check out some of
+the simpler ones to get an idea of how they work. Try to find a similar
+transformation to the one you want to add and copy off of it. More details
+can be found in the comments inside the code itself.
+
+Configuring for 16 bit platforms
+
+You will want to look into zconf.h to tell zlib (and thus libpng) that
+it cannot allocate more then 64K at a time. Even if you can, the memory
+won't be accessible. So limit zlib and libpng to 64K by defining MAXSEG_64K.
+
+Configuring for DOS
+
+For DOS users who only have access to the lower 640K, you will
+have to limit zlib's memory usage via a png_set_compression_mem_level()
+call. See zlib.h or zconf.h in the zlib library for more information.
+
+Configuring for Medium Model
+
+Libpng's support for medium model has been tested on most of the popular
+compilers. Make sure MAXSEG_64K gets defined, USE_FAR_KEYWORD gets
+defined, and FAR gets defined to far in pngconf.h, and you should be
+all set. Everything in the library (except for zlib's structure) is
+expecting far data. You must use the typedefs with the p or pp on
+the end for pointers (or at least look at them and be careful). Make
+note that the rows of data are defined as png_bytepp, which is an
+unsigned char far * far *.
+
+Configuring for gui/windowing platforms:
+
+You will need to write new error and warning functions that use the GUI
+interface, as described previously, and set them to be the error and
+warning functions at the time that png_create_*_struct() is called,
+in order to have them available during the structure initialization.
+They can be changed later via png_set_error_fn(). On some compilers,
+you may also have to change the memory allocators (png_malloc, etc.).
+
+Configuring for compiler xxx:
+
+All includes for libpng are in pngconf.h. If you need to add, change
+or delete an include, this is the place to do it.
+The includes that are not needed outside libpng are placed in pngpriv.h,
+which is only used by the routines inside libpng itself.
+The files in libpng proper only include pngpriv.h and png.h, which
+in turn includes pngconf.h.
+
+Configuring zlib:
+
+There are special functions to configure the compression. Perhaps the
+most useful one changes the compression level, which currently uses
+input compression values in the range 0 - 9. The library normally
+uses the default compression level (Z_DEFAULT_COMPRESSION = 6). Tests
+have shown that for a large majority of images, compression values in
+the range 3-6 compress nearly as well as higher levels, and do so much
+faster. For online applications it may be desirable to have maximum speed
+(Z_BEST_SPEED = 1). With versions of zlib after v0.99, you can also
+specify no compression (Z_NO_COMPRESSION = 0), but this would create
+files larger than just storing the raw bitmap. You can specify the
+compression level by calling:
+
+ png_set_compression_level(png_ptr, level);
+
+Another useful one is to reduce the memory level used by the library.
+The memory level defaults to 8, but it can be lowered if you are
+short on memory (running DOS, for example, where you only have 640K).
+Note that the memory level does have an effect on compression; among
+other things, lower levels will result in sections of incompressible
+data being emitted in smaller stored blocks, with a correspondingly
+larger relative overhead of up to 15% in the worst case.
+
+ png_set_compression_mem_level(png_ptr, level);
+
+The other functions are for configuring zlib. They are not recommended
+for normal use and may result in writing an invalid PNG file. See
+zlib.h for more information on what these mean.
+
+ png_set_compression_strategy(png_ptr,
+ strategy);
+ png_set_compression_window_bits(png_ptr,
+ window_bits);
+ png_set_compression_method(png_ptr, method);
+ png_set_compression_buffer_size(png_ptr, size);
+
+Controlling row filtering
+
+If you want to control whether libpng uses filtering or not, which
+filters are used, and how it goes about picking row filters, you
+can call one of these functions. The selection and configuration
+of row filters can have a significant impact on the size and
+encoding speed and a somewhat lesser impact on the decoding speed
+of an image. Filtering is enabled by default for RGB and grayscale
+images (with and without alpha), but not for paletted images nor
+for any images with bit depths less than 8 bits/pixel.
+
+The 'method' parameter sets the main filtering method, which is
+currently only '0' in the PNG 1.2 specification. The 'filters'
+parameter sets which filter(s), if any, should be used for each
+scanline. Possible values are PNG_ALL_FILTERS and PNG_NO_FILTERS
+to turn filtering on and off, respectively.
+
+Individual filter types are PNG_FILTER_NONE, PNG_FILTER_SUB,
+PNG_FILTER_UP, PNG_FILTER_AVG, PNG_FILTER_PAETH, which can be bitwise
+ORed together with '|' to specify one or more filters to use.
+These filters are described in more detail in the PNG specification.
+If you intend to change the filter type during the course of writing
+the image, you should start with flags set for all of the filters
+you intend to use so that libpng can initialize its internal
+structures appropriately for all of the filter types. (Note that this
+means the first row must always be adaptively filtered, because libpng
+currently does not allocate the filter buffers until png_write_row()
+is called for the first time.)
+
+ filters = PNG_FILTER_NONE | PNG_FILTER_SUB
+ PNG_FILTER_UP | PNG_FILTER_AVG |
+ PNG_FILTER_PAETH | PNG_ALL_FILTERS;
+
+ png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE,
+ filters);
+ The second parameter can also be
+ PNG_INTRAPIXEL_DIFFERENCING if you are
+ writing a PNG to be embedded in a MNG
+ datastream. This parameter must be the
+ same as the value of filter_method used
+ in png_set_IHDR().
+
+It is also possible to influence how libpng chooses from among the
+available filters. This is done in one or both of two ways - by
+telling it how important it is to keep the same filter for successive
+rows, and by telling it the relative computational costs of the filters.
+
+ double weights[3] = {1.5, 1.3, 1.1},
+ costs[PNG_FILTER_VALUE_LAST] =
+ {1.0, 1.3, 1.3, 1.5, 1.7};
+
+ png_set_filter_heuristics(png_ptr,
+ PNG_FILTER_HEURISTIC_WEIGHTED, 3,
+ weights, costs);
+
+The weights are multiplying factors that indicate to libpng that the
+row filter should be the same for successive rows unless another row filter
+is that many times better than the previous filter. In the above example,
+if the previous 3 filters were SUB, SUB, NONE, the SUB filter could have a
+"sum of absolute differences" 1.5 x 1.3 times higher than other filters
+and still be chosen, while the NONE filter could have a sum 1.1 times
+higher than other filters and still be chosen. Unspecified weights are
+taken to be 1.0, and the specified weights should probably be declining
+like those above in order to emphasize recent filters over older filters.
+
+The filter costs specify for each filter type a relative decoding cost
+to be considered when selecting row filters. This means that filters
+with higher costs are less likely to be chosen over filters with lower
+costs, unless their "sum of absolute differences" is that much smaller.
+The costs do not necessarily reflect the exact computational speeds of
+the various filters, since this would unduly influence the final image
+size.
+
+Note that the numbers above were invented purely for this example and
+are given only to help explain the function usage. Little testing has
+been done to find optimum values for either the costs or the weights.
+
+Removing unwanted object code
+
+There are a bunch of #define's in pngconf.h that control what parts of
+libpng are compiled. All the defines end in _SUPPORTED. If you are
+never going to use a capability, you can change the #define to #undef
+before recompiling libpng and save yourself code and data space, or
+you can turn off individual capabilities with defines that begin with
+PNG_NO_.
+
+You can also turn all of the transforms and ancillary chunk capabilities
+off en masse with compiler directives that define
+PNG_NO_READ[or WRITE]_TRANSFORMS, or PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS,
+or all four,
+along with directives to turn on any of the capabilities that you do
+want. The PNG_NO_READ[or WRITE]_TRANSFORMS directives disable the extra
+transformations but still leave the library fully capable of reading
+and writing PNG files with all known public chunks. Use of the
+PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS directive produces a library
+that is incapable of reading or writing ancillary chunks. If you are
+not using the progressive reading capability, you can turn that off
+with PNG_NO_PROGRESSIVE_READ (don't confuse this with the INTERLACING
+capability, which you'll still have).
+
+All the reading and writing specific code are in separate files, so the
+linker should only grab the files it needs. However, if you want to
+make sure, or if you are building a stand alone library, all the
+reading files start with pngr and all the writing files start with
+pngw. The files that don't match either (like png.c, pngtrans.c, etc.)
+are used for both reading and writing, and always need to be included.
+The progressive reader is in pngpread.c
+
+If you are creating or distributing a dynamically linked library (a .so
+or DLL file), you should not remove or disable any parts of the library,
+as this will cause applications linked with different versions of the
+library to fail if they call functions not available in your library.
+The size of the library itself should not be an issue, because only
+those sections that are actually used will be loaded into memory.
+
+Requesting debug printout
+
+The macro definition PNG_DEBUG can be used to request debugging
+printout. Set it to an integer value in the range 0 to 3. Higher
+numbers result in increasing amounts of debugging information. The
+information is printed to the "stderr" file, unless another file
+name is specified in the PNG_DEBUG_FILE macro definition.
+
+When PNG_DEBUG > 0, the following functions (macros) become available:
+
+ png_debug(level, message)
+ png_debug1(level, message, p1)
+ png_debug2(level, message, p1, p2)
+
+in which "level" is compared to PNG_DEBUG to decide whether to print
+the message, "message" is the formatted string to be printed,
+and p1 and p2 are parameters that are to be embedded in the string
+according to printf-style formatting directives. For example,
+
+ png_debug1(2, "foo=%d\n", foo);
+
+is expanded to
+
+ if(PNG_DEBUG > 2)
+ fprintf(PNG_DEBUG_FILE, "foo=%d\n", foo);
+
+When PNG_DEBUG is defined but is zero, the macros aren't defined, but you
+can still use PNG_DEBUG to control your own debugging:
+
+ #ifdef PNG_DEBUG
+ fprintf(stderr, ...
+ #endif
+
+When PNG_DEBUG = 1, the macros are defined, but only png_debug statements
+having level = 0 will be printed. There aren't any such statements in
+this version of libpng, but if you insert some they will be printed.
+
+VI. MNG support
+
+The MNG specification (available at http://www.libpng.org/pub/mng) allows
+certain extensions to PNG for PNG images that are embedded in MNG datastreams.
+Libpng can support some of these extensions. To enable them, use the
+png_permit_mng_features() function:
+
+ feature_set = png_permit_mng_features(png_ptr, mask)
+ mask is a png_uint_32 containing the bitwise OR of the
+ features you want to enable. These include
+ PNG_FLAG_MNG_EMPTY_PLTE
+ PNG_FLAG_MNG_FILTER_64
+ PNG_ALL_MNG_FEATURES
+ feature_set is a png_uint_32 that is the bitwise AND of
+ your mask with the set of MNG features that is
+ supported by the version of libpng that you are using.
+
+It is an error to use this function when reading or writing a standalone
+PNG file with the PNG 8-byte signature. The PNG datastream must be wrapped
+in a MNG datastream. As a minimum, it must have the MNG 8-byte signature
+and the MHDR and MEND chunks. Libpng does not provide support for these
+or any other MNG chunks; your application must provide its own support for
+them. You may wish to consider using libmng (available at
+http://www.libmng.com) instead.
+
+VII. Changes to Libpng from version 0.88
+
+It should be noted that versions of libpng later than 0.96 are not
+distributed by the original libpng author, Guy Schalnat, nor by
+Andreas Dilger, who had taken over from Guy during 1996 and 1997, and
+distributed versions 0.89 through 0.96, but rather by another member
+of the original PNG Group, Glenn Randers-Pehrson. Guy and Andreas are
+still alive and well, but they have moved on to other things.
+
+The old libpng functions png_read_init(), png_write_init(),
+png_info_init(), png_read_destroy(), and png_write_destroy() have been
+moved to PNG_INTERNAL in version 0.95 to discourage their use. These
+functions will be removed from libpng version 2.0.0.
+
+The preferred method of creating and initializing the libpng structures is
+via the png_create_read_struct(), png_create_write_struct(), and
+png_create_info_struct() because they isolate the size of the structures
+from the application, allow version error checking, and also allow the
+use of custom error handling routines during the initialization, which
+the old functions do not. The functions png_read_destroy() and
+png_write_destroy() do not actually free the memory that libpng
+allocated for these structs, but just reset the data structures, so they
+can be used instead of png_destroy_read_struct() and
+png_destroy_write_struct() if you feel there is too much system overhead
+allocating and freeing the png_struct for each image read.
+
+Setting the error callbacks via png_set_message_fn() before
+png_read_init() as was suggested in libpng-0.88 is no longer supported
+because this caused applications that do not use custom error functions
+to fail if the png_ptr was not initialized to zero. It is still possible
+to set the error callbacks AFTER png_read_init(), or to change them with
+png_set_error_fn(), which is essentially the same function, but with a new
+name to force compilation errors with applications that try to use the old
+method.
+
+Starting with version 1.0.7, you can find out which version of the library
+you are using at run-time:
+
+ png_uint_32 libpng_vn = png_access_version_number();
+
+The number libpng_vn is constructed from the major version, minor
+version with leading zero, and release number with leading zero,
+(e.g., libpng_vn for version 1.0.7 is 10007).
+
+You can also check which version of png.h you used when compiling your
+application:
+
+ png_uint_32 application_vn = PNG_LIBPNG_VER;
+
+VIII. Changes to Libpng from version 1.0.x to 1.2.x
+
+Support for user memory management was enabled by default. To
+accomplish this, the functions png_create_read_struct_2(),
+png_create_write_struct_2(), png_set_mem_fn(), png_get_mem_ptr(),
+png_malloc_default(), and png_free_default() were added.
+
+Support for the iTXt chunk has been enabled by default as of
+version 1.2.41.
+
+Support for certain MNG features was enabled.
+
+Support for numbered error messages was added. However, we never got
+around to actually numbering the error messages. The function
+png_set_strip_error_numbers() was added (Note: the prototype for this
+function was inadvertently removed from png.h in PNG_NO_ASSEMBLER_CODE
+builds of libpng-1.2.15. It was restored in libpng-1.2.36).
+
+The png_malloc_warn() function was added at libpng-1.2.3. This issues
+a png_warning and returns NULL instead of aborting when it fails to
+acquire the requested memory allocation.
+
+Support for setting user limits on image width and height was enabled
+by default. The functions png_set_user_limits(), png_get_user_width_max(),
+and png_get_user_height_max() were added at libpng-1.2.6.
+
+The png_set_add_alpha() function was added at libpng-1.2.7.
+
+The function png_set_expand_gray_1_2_4_to_8() was added at libpng-1.2.9.
+Unlike png_set_gray_1_2_4_to_8(), the new function does not expand the
+tRNS chunk to alpha. The png_set_gray_1_2_4_to_8() function is
+deprecated.
+
+A number of macro definitions in support of runtime selection of
+assembler code features (especially Intel MMX code support) were
+added at libpng-1.2.0:
+
+ PNG_ASM_FLAG_MMX_SUPPORT_COMPILED
+ PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
+ PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
+ PNG_ASM_FLAG_MMX_READ_INTERLACE
+ PNG_ASM_FLAG_MMX_READ_FILTER_SUB
+ PNG_ASM_FLAG_MMX_READ_FILTER_UP
+ PNG_ASM_FLAG_MMX_READ_FILTER_AVG
+ PNG_ASM_FLAG_MMX_READ_FILTER_PAETH
+ PNG_ASM_FLAGS_INITIALIZED
+ PNG_MMX_READ_FLAGS
+ PNG_MMX_FLAGS
+ PNG_MMX_WRITE_FLAGS
+ PNG_MMX_FLAGS
+
+We added the following functions in support of runtime
+selection of assembler code features:
+
+ png_get_mmx_flagmask()
+ png_set_mmx_thresholds()
+ png_get_asm_flags()
+ png_get_mmx_bitdepth_threshold()
+ png_get_mmx_rowbytes_threshold()
+ png_set_asm_flags()
+
+We replaced all of these functions with simple stubs in libpng-1.2.20,
+when the Intel assembler code was removed due to a licensing issue.
+
+These macros are deprecated:
+
+ PNG_READ_TRANSFORMS_NOT_SUPPORTED
+ PNG_PROGRESSIVE_READ_NOT_SUPPORTED
+ PNG_NO_SEQUENTIAL_READ_SUPPORTED
+ PNG_WRITE_TRANSFORMS_NOT_SUPPORTED
+ PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED
+ PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED
+
+They have been replaced, respectively, by:
+
+ PNG_NO_READ_TRANSFORMS
+ PNG_NO_PROGRESSIVE_READ
+ PNG_NO_SEQUENTIAL_READ
+ PNG_NO_WRITE_TRANSFORMS
+ PNG_NO_READ_ANCILLARY_CHUNKS
+ PNG_NO_WRITE_ANCILLARY_CHUNKS
+
+PNG_MAX_UINT was replaced with PNG_UINT_31_MAX. It has been
+deprecated since libpng-1.0.16 and libpng-1.2.6.
+
+The function
+ png_check_sig(sig, num)
+was replaced with
+ !png_sig_cmp(sig, 0, num)
+It has been deprecated since libpng-0.90.
+
+The function
+ png_set_gray_1_2_4_to_8()
+which also expands tRNS to alpha was replaced with
+ png_set_expand_gray_1_2_4_to_8()
+which does not. It has been deprecated since libpng-1.0.18 and 1.2.9.
+
+IX. Changes to Libpng from version 1.0.x/1.2.x to 1.4.x
+
+Private libpng prototypes and macro definitions were moved from
+png.h and pngconf.h into a new pngpriv.h header file.
+
+Functions png_set_benign_errors(), png_benign_error(), and
+png_chunk_benign_error() were added.
+
+Support for setting the maximum amount of memory that the application
+will allocate for reading chunks was added, as a security measure.
+The functions png_set_chunk_cache_max() and png_get_chunk_cache_max()
+were added to the library.
+
+We implemented support for I/O states by adding png_ptr member io_state
+and functions png_get_io_chunk_name() and png_get_io_state() in pngget.c
+
+We added PNG_TRANSFORM_GRAY_TO_RGB to the available high-level
+input transforms.
+
+Checking for and reporting of errors in the IHDR chunk is more thorough.
+
+Support for global arrays was removed, to improve thread safety.
+
+Some obsolete/deprecated macros and functions have been removed.
+
+Typecasted NULL definitions such as
+ #define png_voidp_NULL (png_voidp)NULL
+were eliminated. If you used these in your application, just use
+NULL instead.
+
+The png_struct and info_struct members "trans" and "trans_values" were
+changed to "trans_alpha" and "trans_color", respectively.
+
+The obsolete, unused pnggccrd.c and pngvcrd.c files and related makefiles
+were removed.
+
+The PNG_1_0_X and PNG_1_2_X macros were eliminated.
+
+The PNG_LEGACY_SUPPORTED macro was eliminated.
+
+Many WIN32_WCE #ifdefs were removed.
+
+The functions png_read_init(info_ptr), png_write_init(info_ptr),
+png_info_init(info_ptr), png_read_destroy(), and png_write_destroy()
+have been removed. They have been deprecated since libpng-0.95.
+
+The png_permit_empty_plte() was removed. It has been deprecated
+since libpng-1.0.9. Use png_permit_mng_features() instead.
+
+We removed the obsolete stub functions png_get_mmx_flagmask(),
+png_set_mmx_thresholds(), png_get_asm_flags(),
+png_get_mmx_bitdepth_threshold(), png_get_mmx_rowbytes_threshold(),
+png_set_asm_flags(), and png_mmx_supported()
+
+We removed the obsolete png_check_sig(), png_memcpy_check(), and
+png_memset_check() functions. Instead use !png_sig_cmp(), png_memcpy(),
+and png_memset(), respectively.
+
+The function png_set_gray_1_2_4_to_8() was removed. It has been
+deprecated since libpng-1.0.18 and 1.2.9, when it was replaced with
+png_set_expand_gray_1_2_4_to_8() because the former function also
+expanded palette images.
+
+We changed the prototype for png_malloc() from
+ png_malloc(png_structp png_ptr, png_uint_32 size)
+to
+ png_malloc(png_structp png_ptr, png_alloc_size_t size)
+
+This also applies to the prototype for the user replacement malloc_fn().
+
+The png_calloc() function was added and is used in place of
+of "png_malloc(); png_memset();" except in the case in png_read_png()
+where the array consists of pointers; in this case a "for" loop is used
+after the png_malloc() to set the pointers to NULL, to give robust.
+behavior in case the application runs out of memory part-way through
+the process.
+
+We changed the prototypes of png_get_compression_buffer_size() and
+png_set_compression_buffer_size() to work with png_size_t instead of
+png_uint_32.
+
+Support for numbered error messages was removed by default, since we
+never got around to actually numbering the error messages. The function
+png_set_strip_error_numbers() was removed from the library by default.
+
+The png_zalloc() and png_zfree() functions are no longer exported.
+The png_zalloc() function no longer zeroes out the memory that it
+allocates.
+
+Support for dithering was disabled by default in libpng-1.4.0, because
+been well tested and doesn't actually "dither". The code was not
+removed, however, and could be enabled by building libpng with
+PNG_READ_DITHER_SUPPORTED defined. In libpng-1.4.2, this support
+was reenabled, but the function was renamed png_set_quantize() to
+reflect more accurately what it actually does. At the same time,
+the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros were also renamed to
+PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
+
+We removed the trailing '.' from the warning and error messages.
+
+X. Detecting libpng
+
+The png_get_io_ptr() function has been present since libpng-0.88, has never
+changed, and is unaffected by conditional compilation macros. It is the
+best choice for use in configure scripts for detecting the presence of any
+libpng version since 0.88. In an autoconf "configure.in" you could use
+
+ AC_CHECK_LIB(png, png_get_io_ptr, ...
+
+XI. Source code repository
+
+Since about February 2009, version 1.2.34, libpng has been under "git" source
+control. The git repository was built from old libpng-x.y.z.tar.gz files
+going back to version 0.70. You can access the git repository (read only)
+at
+
+ git://libpng.git.sourceforge.net/gitroot/libpng
+
+or you can browse it via "gitweb" at
+
+ http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng
+
+Patches can be sent to glennrp at users.sourceforge.net or to
+png-mng-implement at lists.sourceforge.net or you can upload them to
+the libpng bug tracker at
+
+ http://libpng.sourceforge.net
+
+XII. Coding style
+
+Our coding style is similar to the "Allman" style, with curly
+braces on separate lines:
+
+ if (condition)
+ {
+ action;
+ }
+
+ else if (another condition)
+ {
+ another action;
+ }
+
+The braces can be omitted from simple one-line actions:
+
+ if (condition)
+ return (0);
+
+We use 3-space indentation, except for continued statements which
+are usually indented the same as the first line of the statement
+plus four more spaces.
+
+For macro definitions we use 2-space indentation, always leaving the "#"
+in the first column.
+
+ #ifndef PNG_NO_FEATURE
+ # ifndef PNG_FEATURE_SUPPORTED
+ # define PNG_FEATURE_SUPPORTED
+ # endif
+ #endif
+
+Comments appear with the leading "/*" at the same indentation as
+the statement that follows the comment:
+
+ /* Single-line comment */
+ statement;
+
+ /* This is a multiple-line
+ * comment.
+ */
+ statement;
+
+Very short comments can be placed after the end of the statement
+to which they pertain:
+
+ statement; /* comment */
+
+We don't use C++ style ("//") comments. We have, however,
+used them in the past in some now-abandoned MMX assembler
+code.
+
+Functions and their curly braces are not indented, and
+exported functions are marked with PNGAPI:
+
+ /* This is a public function that is visible to
+ * application programers. It does thus-and-so.
+ */
+ void PNGAPI
+ png_exported_function(png_ptr, png_info, foo)
+ {
+ body;
+ }
+
+The prototypes for all exported functions appear in png.h,
+above the comment that says
+
+ /* Maintainer: Put new public prototypes here ... */
+
+We mark all non-exported functions with "/* PRIVATE */"":
+
+ void /* PRIVATE */
+ png_non_exported_function(png_ptr, png_info, foo)
+ {
+ body;
+ }
+
+The prototypes for non-exported functions (except for those in
+pngtest) appear in
+pngpriv.h
+above the comment that says
+
+ /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
+
+The names of all exported functions and variables begin
+with "png_", and all publicly visible C preprocessor
+macros begin with "PNG_".
+
+We put a space after each comma and after each semicolon
+in "for" statments, and we put spaces before and after each
+C binary operator and after "for" or "while", and before
+"?". We don't put a space between a typecast and the expression
+being cast, nor do we put one between a function name and the
+left parenthesis that follows it:
+
+ for (i = 2; i > 0; --i)
+ y[i] = a(x) + (int)b;
+
+We prefer #ifdef and #ifndef to #if defined() and if !defined()
+when there is only one macro being tested.
+
+We do not use the TAB character for indentation in the C sources.
+
+Lines do not exceed 80 characters.
+
+Other rules can be inferred by inspecting the libpng source.
+
+XIII. Y2K Compliance in libpng
+
+September 23, 2010
+
+Since the PNG Development group is an ad-hoc body, we can't make
+an official declaration.
+
+This is your unofficial assurance that libpng from version 0.71 and
+upward through 1.4.4 are Y2K compliant. It is my belief that earlier
+versions were also Y2K compliant.
+
+Libpng only has three year fields. One is a 2-byte unsigned integer that
+will hold years up to 65535. The other two hold the date in text
+format, and will hold years up to 9999.
+
+The integer is
+ "png_uint_16 year" in png_time_struct.
+
+The strings are
+ "png_charp time_buffer" in png_struct and
+ "near_time_buffer", which is a local character string in png.c.
+
+There are seven time-related functions:
+
+ png_convert_to_rfc_1123() in png.c
+ (formerly png_convert_to_rfc_1152() in error)
+ png_convert_from_struct_tm() in pngwrite.c, called
+ in pngwrite.c
+ png_convert_from_time_t() in pngwrite.c
+ png_get_tIME() in pngget.c
+ png_handle_tIME() in pngrutil.c, called in pngread.c
+ png_set_tIME() in pngset.c
+ png_write_tIME() in pngwutil.c, called in pngwrite.c
+
+All appear to handle dates properly in a Y2K environment. The
+png_convert_from_time_t() function calls gmtime() to convert from system
+clock time, which returns (year - 1900), which we properly convert to
+the full 4-digit year. There is a possibility that applications using
+libpng are not passing 4-digit years into the png_convert_to_rfc_1123()
+function, or that they are incorrectly passing only a 2-digit year
+instead of "year - 1900" into the png_convert_from_struct_tm() function,
+but this is not under our control. The libpng documentation has always
+stated that it works with 4-digit years, and the APIs have been
+documented as such.
+
+The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned
+integer to hold the year, and can hold years as large as 65535.
+
+zlib, upon which libpng depends, is also Y2K compliant. It contains
+no date-related code.
+
+
+ Glenn Randers-Pehrson
+ libpng maintainer
+ PNG Development Group
--- /dev/null
+
+/* png.c - location for general purpose libpng functions
+ *
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+#include "pngpriv.h"
+
+/* Generate a compiler error if there is an old png.h in the search path. */
+typedef png_libpng_version_1_5_2 Your_png_h_is_not_version_1_5_2;
+
+/* Tells libpng that we have already handled the first "num_bytes" bytes
+ * of the PNG file signature. If the PNG data is embedded into another
+ * stream we can set num_bytes = 8 so that libpng will not attempt to read
+ * or write any of the magic bytes before it starts on the IHDR.
+ */
+
+#ifdef PNG_READ_SUPPORTED
+void PNGAPI
+png_set_sig_bytes(png_structp png_ptr, int num_bytes)
+{
+ png_debug(1, "in png_set_sig_bytes");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (num_bytes > 8)
+ png_error(png_ptr, "Too many bytes for PNG signature");
+
+ png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes);
+}
+
+/* Checks whether the supplied bytes match the PNG signature. We allow
+ * checking less than the full 8-byte signature so that those apps that
+ * already read the first few bytes of a file to determine the file type
+ * can simply check the remaining bytes for extra assurance. Returns
+ * an integer less than, equal to, or greater than zero if sig is found,
+ * respectively, to be less than, to match, or be greater than the correct
+ * PNG signature (this is the same behaviour as strcmp, memcmp, etc).
+ */
+int PNGAPI
+png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check)
+{
+ png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+
+ if (num_to_check > 8)
+ num_to_check = 8;
+
+ else if (num_to_check < 1)
+ return (-1);
+
+ if (start > 7)
+ return (-1);
+
+ if (start + num_to_check > 8)
+ num_to_check = 8 - start;
+
+ return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
+}
+
+#endif /* PNG_READ_SUPPORTED */
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+/* Function to allocate memory for zlib */
+PNG_FUNCTION(voidpf /* PRIVATE */,
+png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED)
+{
+ png_voidp ptr;
+ png_structp p=(png_structp)png_ptr;
+ png_uint_32 save_flags=p->flags;
+ png_alloc_size_t num_bytes;
+
+ if (png_ptr == NULL)
+ return (NULL);
+
+ if (items > PNG_UINT_32_MAX/size)
+ {
+ png_warning (p, "Potential overflow in png_zalloc()");
+ return (NULL);
+ }
+ num_bytes = (png_alloc_size_t)items * size;
+
+ p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
+ ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
+ p->flags=save_flags;
+
+ return ((voidpf)ptr);
+}
+
+/* Function to free memory for zlib */
+void /* PRIVATE */
+png_zfree(voidpf png_ptr, voidpf ptr)
+{
+ png_free((png_structp)png_ptr, (png_voidp)ptr);
+}
+
+/* Reset the CRC variable to 32 bits of 1's. Care must be taken
+ * in case CRC is > 32 bits to leave the top bits 0.
+ */
+void /* PRIVATE */
+png_reset_crc(png_structp png_ptr)
+{
+ png_ptr->crc = crc32(0, Z_NULL, 0);
+}
+
+/* Calculate the CRC over a section of data. We can only pass as
+ * much data to this routine as the largest single buffer size. We
+ * also check that this data will actually be used before going to the
+ * trouble of calculating it.
+ */
+void /* PRIVATE */
+png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length)
+{
+ int need_crc = 1;
+
+ if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
+ {
+ if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
+ (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
+ need_crc = 0;
+ }
+
+ else /* critical */
+ {
+ if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
+ need_crc = 0;
+ }
+
+ if (need_crc)
+ png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
+}
+
+/* Allocate the memory for an info_struct for the application. We don't
+ * really need the png_ptr, but it could potentially be useful in the
+ * future. This should be used in favour of malloc(png_sizeof(png_info))
+ * and png_info_init() so that applications that want to use a shared
+ * libpng don't have to be recompiled if png_info changes size.
+ */
+PNG_FUNCTION(png_infop,PNGAPI
+png_create_info_struct,(png_structp png_ptr),PNG_ALLOCATED)
+{
+ png_infop info_ptr;
+
+ png_debug(1, "in png_create_info_struct");
+
+ if (png_ptr == NULL)
+ return (NULL);
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
+ png_ptr->malloc_fn, png_ptr->mem_ptr);
+#else
+ info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
+#endif
+ if (info_ptr != NULL)
+ png_info_init_3(&info_ptr, png_sizeof(png_info));
+
+ return (info_ptr);
+}
+
+/* This function frees the memory associated with a single info struct.
+ * Normally, one would use either png_destroy_read_struct() or
+ * png_destroy_write_struct() to free an info struct, but this may be
+ * useful for some applications.
+ */
+void PNGAPI
+png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
+{
+ png_infop info_ptr = NULL;
+
+ png_debug(1, "in png_destroy_info_struct");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (info_ptr_ptr != NULL)
+ info_ptr = *info_ptr_ptr;
+
+ if (info_ptr != NULL)
+ {
+ png_info_destroy(png_ptr, info_ptr);
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
+ png_ptr->mem_ptr);
+#else
+ png_destroy_struct((png_voidp)info_ptr);
+#endif
+ *info_ptr_ptr = NULL;
+ }
+}
+
+/* Initialize the info structure. This is now an internal function (0.89)
+ * and applications using it are urged to use png_create_info_struct()
+ * instead.
+ */
+
+void PNGAPI
+png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
+{
+ png_infop info_ptr = *ptr_ptr;
+
+ png_debug(1, "in png_info_init_3");
+
+ if (info_ptr == NULL)
+ return;
+
+ if (png_sizeof(png_info) > png_info_struct_size)
+ {
+ png_destroy_struct(info_ptr);
+ info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
+ *ptr_ptr = info_ptr;
+ }
+
+ /* Set everything to 0 */
+ png_memset(info_ptr, 0, png_sizeof(png_info));
+}
+
+void PNGAPI
+png_data_freer(png_structp png_ptr, png_infop info_ptr,
+ int freer, png_uint_32 mask)
+{
+ png_debug(1, "in png_data_freer");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ if (freer == PNG_DESTROY_WILL_FREE_DATA)
+ info_ptr->free_me |= mask;
+
+ else if (freer == PNG_USER_WILL_FREE_DATA)
+ info_ptr->free_me &= ~mask;
+
+ else
+ png_warning(png_ptr,
+ "Unknown freer parameter in png_data_freer");
+}
+
+void PNGAPI
+png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
+ int num)
+{
+ png_debug(1, "in png_free_data");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+#ifdef PNG_TEXT_SUPPORTED
+ /* Free text item num or (if num == -1) all text items */
+ if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
+ {
+ if (num != -1)
+ {
+ if (info_ptr->text && info_ptr->text[num].key)
+ {
+ png_free(png_ptr, info_ptr->text[num].key);
+ info_ptr->text[num].key = NULL;
+ }
+ }
+
+ else
+ {
+ int i;
+ for (i = 0; i < info_ptr->num_text; i++)
+ png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
+ png_free(png_ptr, info_ptr->text);
+ info_ptr->text = NULL;
+ info_ptr->num_text=0;
+ }
+ }
+#endif
+
+#ifdef PNG_tRNS_SUPPORTED
+ /* Free any tRNS entry */
+ if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
+ {
+ png_free(png_ptr, info_ptr->trans_alpha);
+ info_ptr->trans_alpha = NULL;
+ info_ptr->valid &= ~PNG_INFO_tRNS;
+ }
+#endif
+
+#ifdef PNG_sCAL_SUPPORTED
+ /* Free any sCAL entry */
+ if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
+ {
+#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
+ png_free(png_ptr, info_ptr->scal_s_width);
+ png_free(png_ptr, info_ptr->scal_s_height);
+ info_ptr->scal_s_width = NULL;
+ info_ptr->scal_s_height = NULL;
+#endif
+ info_ptr->valid &= ~PNG_INFO_sCAL;
+ }
+#endif
+
+#ifdef PNG_pCAL_SUPPORTED
+ /* Free any pCAL entry */
+ if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
+ {
+ png_free(png_ptr, info_ptr->pcal_purpose);
+ png_free(png_ptr, info_ptr->pcal_units);
+ info_ptr->pcal_purpose = NULL;
+ info_ptr->pcal_units = NULL;
+ if (info_ptr->pcal_params != NULL)
+ {
+ int i;
+ for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
+ {
+ png_free(png_ptr, info_ptr->pcal_params[i]);
+ info_ptr->pcal_params[i] = NULL;
+ }
+ png_free(png_ptr, info_ptr->pcal_params);
+ info_ptr->pcal_params = NULL;
+ }
+ info_ptr->valid &= ~PNG_INFO_pCAL;
+ }
+#endif
+
+#ifdef PNG_iCCP_SUPPORTED
+ /* Free any iCCP entry */
+ if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
+ {
+ png_free(png_ptr, info_ptr->iccp_name);
+ png_free(png_ptr, info_ptr->iccp_profile);
+ info_ptr->iccp_name = NULL;
+ info_ptr->iccp_profile = NULL;
+ info_ptr->valid &= ~PNG_INFO_iCCP;
+ }
+#endif
+
+#ifdef PNG_sPLT_SUPPORTED
+ /* Free a given sPLT entry, or (if num == -1) all sPLT entries */
+ if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
+ {
+ if (num != -1)
+ {
+ if (info_ptr->splt_palettes)
+ {
+ png_free(png_ptr, info_ptr->splt_palettes[num].name);
+ png_free(png_ptr, info_ptr->splt_palettes[num].entries);
+ info_ptr->splt_palettes[num].name = NULL;
+ info_ptr->splt_palettes[num].entries = NULL;
+ }
+ }
+
+ else
+ {
+ if (info_ptr->splt_palettes_num)
+ {
+ int i;
+ for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
+ png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
+
+ png_free(png_ptr, info_ptr->splt_palettes);
+ info_ptr->splt_palettes = NULL;
+ info_ptr->splt_palettes_num = 0;
+ }
+ info_ptr->valid &= ~PNG_INFO_sPLT;
+ }
+ }
+#endif
+
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+ if (png_ptr->unknown_chunk.data)
+ {
+ png_free(png_ptr, png_ptr->unknown_chunk.data);
+ png_ptr->unknown_chunk.data = NULL;
+ }
+
+ if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
+ {
+ if (num != -1)
+ {
+ if (info_ptr->unknown_chunks)
+ {
+ png_free(png_ptr, info_ptr->unknown_chunks[num].data);
+ info_ptr->unknown_chunks[num].data = NULL;
+ }
+ }
+
+ else
+ {
+ int i;
+
+ if (info_ptr->unknown_chunks_num)
+ {
+ for (i = 0; i < info_ptr->unknown_chunks_num; i++)
+ png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
+
+ png_free(png_ptr, info_ptr->unknown_chunks);
+ info_ptr->unknown_chunks = NULL;
+ info_ptr->unknown_chunks_num = 0;
+ }
+ }
+ }
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
+ /* Free any hIST entry */
+ if ((mask & PNG_FREE_HIST) & info_ptr->free_me)
+ {
+ png_free(png_ptr, info_ptr->hist);
+ info_ptr->hist = NULL;
+ info_ptr->valid &= ~PNG_INFO_hIST;
+ }
+#endif
+
+ /* Free any PLTE entry that was internally allocated */
+ if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
+ {
+ png_zfree(png_ptr, info_ptr->palette);
+ info_ptr->palette = NULL;
+ info_ptr->valid &= ~PNG_INFO_PLTE;
+ info_ptr->num_palette = 0;
+ }
+
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+ /* Free any image bits attached to the info structure */
+ if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
+ {
+ if (info_ptr->row_pointers)
+ {
+ int row;
+ for (row = 0; row < (int)info_ptr->height; row++)
+ {
+ png_free(png_ptr, info_ptr->row_pointers[row]);
+ info_ptr->row_pointers[row] = NULL;
+ }
+ png_free(png_ptr, info_ptr->row_pointers);
+ info_ptr->row_pointers = NULL;
+ }
+ info_ptr->valid &= ~PNG_INFO_IDAT;
+ }
+#endif
+
+ if (num != -1)
+ mask &= ~PNG_FREE_MUL;
+
+ info_ptr->free_me &= ~mask;
+}
+
+/* This is an internal routine to free any memory that the info struct is
+ * pointing to before re-using it or freeing the struct itself. Recall
+ * that png_free() checks for NULL pointers for us.
+ */
+void /* PRIVATE */
+png_info_destroy(png_structp png_ptr, png_infop info_ptr)
+{
+ png_debug(1, "in png_info_destroy");
+
+ png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ if (png_ptr->num_chunk_list)
+ {
+ png_free(png_ptr, png_ptr->chunk_list);
+ png_ptr->chunk_list = NULL;
+ png_ptr->num_chunk_list = 0;
+ }
+#endif
+
+ png_info_init_3(&info_ptr, png_sizeof(png_info));
+}
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+
+/* This function returns a pointer to the io_ptr associated with the user
+ * functions. The application should free any memory associated with this
+ * pointer before png_write_destroy() or png_read_destroy() are called.
+ */
+png_voidp PNGAPI
+png_get_io_ptr(png_structp png_ptr)
+{
+ if (png_ptr == NULL)
+ return (NULL);
+
+ return (png_ptr->io_ptr);
+}
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+# ifdef PNG_STDIO_SUPPORTED
+/* Initialize the default input/output functions for the PNG file. If you
+ * use your own read or write routines, you can call either png_set_read_fn()
+ * or png_set_write_fn() instead of png_init_io(). If you have defined
+ * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't
+ * necessarily available.
+ */
+void PNGAPI
+png_init_io(png_structp png_ptr, png_FILE_p fp)
+{
+ png_debug(1, "in png_init_io");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->io_ptr = (png_voidp)fp;
+}
+# endif
+
+# ifdef PNG_TIME_RFC1123_SUPPORTED
+/* Convert the supplied time into an RFC 1123 string suitable for use in
+ * a "Creation Time" or other text-based time string.
+ */
+png_const_charp PNGAPI
+png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime)
+{
+ static PNG_CONST char short_months[12][4] =
+ {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+
+ if (png_ptr == NULL)
+ return (NULL);
+
+ if (png_ptr->time_buffer == NULL)
+ {
+ png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
+ png_sizeof(char)));
+ }
+
+# ifdef USE_FAR_KEYWORD
+ {
+ char near_time_buf[29];
+ png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000",
+ ptime->day % 32, short_months[(ptime->month - 1) % 12],
+ ptime->year, ptime->hour % 24, ptime->minute % 60,
+ ptime->second % 61);
+ png_memcpy(png_ptr->time_buffer, near_time_buf,
+ 29*png_sizeof(char));
+ }
+# else
+ png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000",
+ ptime->day % 32, short_months[(ptime->month - 1) % 12],
+ ptime->year, ptime->hour % 24, ptime->minute % 60,
+ ptime->second % 61);
+# endif
+ return png_ptr->time_buffer;
+}
+# endif /* PNG_TIME_RFC1123_SUPPORTED */
+
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+
+png_const_charp PNGAPI
+png_get_copyright(png_const_structp png_ptr)
+{
+ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
+#ifdef PNG_STRING_COPYRIGHT
+ return PNG_STRING_COPYRIGHT
+#else
+# ifdef __STDC__
+ return PNG_STRING_NEWLINE \
+ "libpng version 1.5.2 - March 31, 2011" PNG_STRING_NEWLINE \
+ "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
+ "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
+ "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
+ PNG_STRING_NEWLINE;
+# else
+ return "libpng version 1.5.2 - March 31, 2011\
+ Copyright (c) 1998-2011 Glenn Randers-Pehrson\
+ Copyright (c) 1996-1997 Andreas Dilger\
+ Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
+# endif
+#endif
+}
+
+/* The following return the library version as a short string in the
+ * format 1.0.0 through 99.99.99zz. To get the version of *.h files
+ * used with your application, print out PNG_LIBPNG_VER_STRING, which
+ * is defined in png.h.
+ * Note: now there is no difference between png_get_libpng_ver() and
+ * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard,
+ * it is guaranteed that png.c uses the correct version of png.h.
+ */
+png_const_charp PNGAPI
+png_get_libpng_ver(png_const_structp png_ptr)
+{
+ /* Version of *.c files used when building libpng */
+ return png_get_header_ver(png_ptr);
+}
+
+png_const_charp PNGAPI
+png_get_header_ver(png_const_structp png_ptr)
+{
+ /* Version of *.h files used when building libpng */
+ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
+ return PNG_LIBPNG_VER_STRING;
+}
+
+png_const_charp PNGAPI
+png_get_header_version(png_const_structp png_ptr)
+{
+ /* Returns longer string containing both version and date */
+ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
+#ifdef __STDC__
+ return PNG_HEADER_VERSION_STRING
+# ifndef PNG_READ_SUPPORTED
+ " (NO READ SUPPORT)"
+# endif
+ PNG_STRING_NEWLINE;
+#else
+ return PNG_HEADER_VERSION_STRING;
+#endif
+}
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+int PNGAPI
+png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name)
+{
+ /* Check chunk_name and return "keep" value if it's on the list, else 0 */
+ int i;
+ png_bytep p;
+ if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
+ return 0;
+
+ p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5;
+ for (i = png_ptr->num_chunk_list; i; i--, p -= 5)
+ if (!png_memcmp(chunk_name, p, 4))
+ return ((int)*(p + 4));
+ return 0;
+}
+# endif
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+
+#ifdef PNG_READ_SUPPORTED
+/* This function, added to libpng-1.0.6g, is untested. */
+int PNGAPI
+png_reset_zstream(png_structp png_ptr)
+{
+ if (png_ptr == NULL)
+ return Z_STREAM_ERROR;
+
+ return (inflateReset(&png_ptr->zstream));
+}
+#endif /* PNG_READ_SUPPORTED */
+
+/* This function was added to libpng-1.0.7 */
+png_uint_32 PNGAPI
+png_access_version_number(void)
+{
+ /* Version of *.c files used when building libpng */
+ return((png_uint_32)PNG_LIBPNG_VER);
+}
+
+
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+# ifdef PNG_SIZE_T
+/* Added at libpng version 1.2.6 */
+ PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
+png_size_t PNGAPI
+png_convert_size(size_t size)
+{
+ if (size > (png_size_t)-1)
+ PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
+
+ return ((png_size_t)size);
+}
+# endif /* PNG_SIZE_T */
+
+/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */
+# ifdef PNG_CHECK_cHRM_SUPPORTED
+
+int /* PRIVATE */
+png_check_cHRM_fixed(png_structp png_ptr,
+ png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
+ png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
+ png_fixed_point blue_x, png_fixed_point blue_y)
+{
+ int ret = 1;
+ unsigned long xy_hi,xy_lo,yx_hi,yx_lo;
+
+ png_debug(1, "in function png_check_cHRM_fixed");
+
+ if (png_ptr == NULL)
+ return 0;
+
+ if (white_x < 0 || white_y <= 0 ||
+ red_x < 0 || red_y < 0 ||
+ green_x < 0 || green_y < 0 ||
+ blue_x < 0 || blue_y < 0)
+ {
+ png_warning(png_ptr,
+ "Ignoring attempt to set negative chromaticity value");
+ ret = 0;
+ }
+ if (white_x > (png_fixed_point)PNG_UINT_31_MAX ||
+ white_y > (png_fixed_point)PNG_UINT_31_MAX ||
+ red_x > (png_fixed_point)PNG_UINT_31_MAX ||
+ red_y > (png_fixed_point)PNG_UINT_31_MAX ||
+ green_x > (png_fixed_point)PNG_UINT_31_MAX ||
+ green_y > (png_fixed_point)PNG_UINT_31_MAX ||
+ blue_x > (png_fixed_point)PNG_UINT_31_MAX ||
+ blue_y > (png_fixed_point)PNG_UINT_31_MAX )
+ {
+ png_warning(png_ptr,
+ "Ignoring attempt to set chromaticity value exceeding 21474.83");
+ ret = 0;
+ }
+ if (white_x > 100000L - white_y)
+ {
+ png_warning(png_ptr, "Invalid cHRM white point");
+ ret = 0;
+ }
+
+ if (red_x > 100000L - red_y)
+ {
+ png_warning(png_ptr, "Invalid cHRM red point");
+ ret = 0;
+ }
+
+ if (green_x > 100000L - green_y)
+ {
+ png_warning(png_ptr, "Invalid cHRM green point");
+ ret = 0;
+ }
+
+ if (blue_x > 100000L - blue_y)
+ {
+ png_warning(png_ptr, "Invalid cHRM blue point");
+ ret = 0;
+ }
+
+ png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo);
+ png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo);
+
+ if (xy_hi == yx_hi && xy_lo == yx_lo)
+ {
+ png_warning(png_ptr,
+ "Ignoring attempt to set cHRM RGB triangle with zero area");
+ ret = 0;
+ }
+
+ return ret;
+}
+# endif /* PNG_CHECK_cHRM_SUPPORTED */
+
+void /* PRIVATE */
+png_check_IHDR(png_structp png_ptr,
+ png_uint_32 width, png_uint_32 height, int bit_depth,
+ int color_type, int interlace_type, int compression_type,
+ int filter_type)
+{
+ int error = 0;
+
+ /* Check for width and height valid values */
+ if (width == 0)
+ {
+ png_warning(png_ptr, "Image width is zero in IHDR");
+ error = 1;
+ }
+
+ if (height == 0)
+ {
+ png_warning(png_ptr, "Image height is zero in IHDR");
+ error = 1;
+ }
+
+# ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if (width > png_ptr->user_width_max || width > PNG_USER_WIDTH_MAX)
+
+# else
+ if (width > PNG_USER_WIDTH_MAX)
+# endif
+ {
+ png_warning(png_ptr, "Image width exceeds user limit in IHDR");
+ error = 1;
+ }
+
+# ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if (height > png_ptr->user_height_max || height > PNG_USER_HEIGHT_MAX)
+# else
+ if (height > PNG_USER_HEIGHT_MAX)
+# endif
+ {
+ png_warning(png_ptr, "Image height exceeds user limit in IHDR");
+ error = 1;
+ }
+
+ if (width > PNG_UINT_31_MAX)
+ {
+ png_warning(png_ptr, "Invalid image width in IHDR");
+ error = 1;
+ }
+
+ if (height > PNG_UINT_31_MAX)
+ {
+ png_warning(png_ptr, "Invalid image height in IHDR");
+ error = 1;
+ }
+
+ if (width > (PNG_UINT_32_MAX
+ >> 3) /* 8-byte RGBA pixels */
+ - 48 /* bigrowbuf hack */
+ - 1 /* filter byte */
+ - 7*8 /* rounding of width to multiple of 8 pixels */
+ - 8) /* extra max_pixel_depth pad */
+ png_warning(png_ptr, "Width is too large for libpng to process pixels");
+
+ /* Check other values */
+ if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
+ bit_depth != 8 && bit_depth != 16)
+ {
+ png_warning(png_ptr, "Invalid bit depth in IHDR");
+ error = 1;
+ }
+
+ if (color_type < 0 || color_type == 1 ||
+ color_type == 5 || color_type > 6)
+ {
+ png_warning(png_ptr, "Invalid color type in IHDR");
+ error = 1;
+ }
+
+ if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
+ ((color_type == PNG_COLOR_TYPE_RGB ||
+ color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
+ color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
+ {
+ png_warning(png_ptr, "Invalid color type/bit depth combination in IHDR");
+ error = 1;
+ }
+
+ if (interlace_type >= PNG_INTERLACE_LAST)
+ {
+ png_warning(png_ptr, "Unknown interlace method in IHDR");
+ error = 1;
+ }
+
+ if (compression_type != PNG_COMPRESSION_TYPE_BASE)
+ {
+ png_warning(png_ptr, "Unknown compression method in IHDR");
+ error = 1;
+ }
+
+# ifdef PNG_MNG_FEATURES_SUPPORTED
+ /* Accept filter_method 64 (intrapixel differencing) only if
+ * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
+ * 2. Libpng did not read a PNG signature (this filter_method is only
+ * used in PNG datastreams that are embedded in MNG datastreams) and
+ * 3. The application called png_permit_mng_features with a mask that
+ * included PNG_FLAG_MNG_FILTER_64 and
+ * 4. The filter_method is 64 and
+ * 5. The color_type is RGB or RGBA
+ */
+ if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) &&
+ png_ptr->mng_features_permitted)
+ png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
+
+ if (filter_type != PNG_FILTER_TYPE_BASE)
+ {
+ if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+ (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
+ ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) &&
+ (color_type == PNG_COLOR_TYPE_RGB ||
+ color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
+ {
+ png_warning(png_ptr, "Unknown filter method in IHDR");
+ error = 1;
+ }
+
+ if (png_ptr->mode & PNG_HAVE_PNG_SIGNATURE)
+ {
+ png_warning(png_ptr, "Invalid filter method in IHDR");
+ error = 1;
+ }
+ }
+
+# else
+ if (filter_type != PNG_FILTER_TYPE_BASE)
+ {
+ png_warning(png_ptr, "Unknown filter method in IHDR");
+ error = 1;
+ }
+# endif
+
+ if (error == 1)
+ png_error(png_ptr, "Invalid IHDR data");
+}
+
+#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED)
+/* ASCII to fp functions */
+/* Check an ASCII formated floating point value, see the more detailed
+ * comments in pngpriv.h
+ */
+/* The following is used internally to preserve the 'valid' flag */
+#define png_fp_add(state, flags) ((state) |= (flags))
+#define png_fp_set(state, value)\
+ ((state) = (value) | ((state) & PNG_FP_WAS_VALID))
+
+/* Internal type codes: bits above the base state! */
+#define PNG_FP_SIGN 0 /* [+-] */
+#define PNG_FP_DOT 4 /* . */
+#define PNG_FP_DIGIT 8 /* [0123456789] */
+#define PNG_FP_E 12 /* [Ee] */
+
+int /* PRIVATE */
+png_check_fp_number(png_const_charp string, png_size_t size, int *statep,
+ png_size_tp whereami)
+{
+ int state = *statep;
+ png_size_t i = *whereami;
+
+ while (i < size)
+ {
+ int type;
+ /* First find the type of the next character */
+ {
+ char ch = string[i];
+
+ if (ch >= 48 && ch <= 57)
+ type = PNG_FP_DIGIT;
+
+ else switch (ch)
+ {
+ case 43: case 45: type = PNG_FP_SIGN; break;
+ case 46: type = PNG_FP_DOT; break;
+ case 69: case 101: type = PNG_FP_E; break;
+ default: goto PNG_FP_End;
+ }
+ }
+
+ /* Now deal with this type according to the current
+ * state, the type is arranged to not overlap the
+ * bits of the PNG_FP_STATE.
+ */
+ switch ((state & PNG_FP_STATE) + type)
+ {
+ case PNG_FP_INTEGER + PNG_FP_SIGN:
+ if (state & PNG_FP_SAW_ANY)
+ goto PNG_FP_End; /* not a part of the number */
+
+ png_fp_add(state, PNG_FP_SAW_SIGN);
+ break;
+
+ case PNG_FP_INTEGER + PNG_FP_DOT:
+ /* Ok as trailer, ok as lead of fraction. */
+ if (state & PNG_FP_SAW_DOT) /* two dots */
+ goto PNG_FP_End;
+
+ else if (state & PNG_FP_SAW_DIGIT) /* trailing dot? */
+ png_fp_add(state, PNG_FP_SAW_DOT);
+
+ else
+ png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT);
+
+ break;
+
+ case PNG_FP_INTEGER + PNG_FP_DIGIT:
+ if (state & PNG_FP_SAW_DOT) /* delayed fraction */
+ png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT);
+
+ png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
+
+ break;
+ case PNG_FP_INTEGER + PNG_FP_E:
+ if ((state & PNG_FP_SAW_DIGIT) == 0)
+ goto PNG_FP_End;
+
+ png_fp_set(state, PNG_FP_EXPONENT);
+
+ break;
+
+ /* case PNG_FP_FRACTION + PNG_FP_SIGN:
+ goto PNG_FP_End; ** no sign in exponent */
+
+ /* case PNG_FP_FRACTION + PNG_FP_DOT:
+ goto PNG_FP_End; ** Because SAW_DOT is always set */
+
+ case PNG_FP_FRACTION + PNG_FP_DIGIT:
+ png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
+ break;
+
+ case PNG_FP_FRACTION + PNG_FP_E:
+ /* This is correct because the trailing '.' on an
+ * integer is handled above - so we can only get here
+ * with the sequence ".E" (with no preceding digits).
+ */
+ if ((state & PNG_FP_SAW_DIGIT) == 0)
+ goto PNG_FP_End;
+
+ png_fp_set(state, PNG_FP_EXPONENT);
+
+ break;
+
+ case PNG_FP_EXPONENT + PNG_FP_SIGN:
+ if (state & PNG_FP_SAW_ANY)
+ goto PNG_FP_End; /* not a part of the number */
+
+ png_fp_add(state, PNG_FP_SAW_SIGN);
+
+ break;
+
+ /* case PNG_FP_EXPONENT + PNG_FP_DOT:
+ goto PNG_FP_End; */
+
+ case PNG_FP_EXPONENT + PNG_FP_DIGIT:
+ png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
+
+ break;
+
+ /* case PNG_FP_EXPONEXT + PNG_FP_E:
+ goto PNG_FP_End; */
+
+ default: goto PNG_FP_End; /* I.e. break 2 */
+ }
+
+ /* The character seems ok, continue. */
+ ++i;
+ }
+
+PNG_FP_End:
+ /* Here at the end, update the state and return the correct
+ * return code.
+ */
+ *statep = state;
+ *whereami = i;
+
+ return (state & PNG_FP_SAW_DIGIT) != 0;
+}
+
+
+/* The same but for a complete string. */
+int
+png_check_fp_string(png_const_charp string, png_size_t size)
+{
+ int state=0;
+ png_size_t char_index=0;
+
+ return png_check_fp_number(string, size, &state, &char_index) &&
+ (char_index == size || string[char_index] == 0);
+}
+#endif /* pCAL or sCAL */
+
+#ifdef PNG_READ_sCAL_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+/* Utility used below - a simple accurate power of ten from an integral
+ * exponent.
+ */
+static double
+png_pow10(int power)
+{
+ int recip = 0;
+ double d = 1;
+
+ /* Handle negative exponent with a reciprocal at the end because
+ * 10 is exact whereas .1 is inexact in base 2
+ */
+ if (power < 0)
+ {
+ if (power < DBL_MIN_10_EXP) return 0;
+ recip = 1, power = -power;
+ }
+
+ if (power > 0)
+ {
+ /* Decompose power bitwise. */
+ double mult = 10;
+ do
+ {
+ if (power & 1) d *= mult;
+ mult *= mult;
+ power >>= 1;
+ }
+ while (power > 0);
+
+ if (recip) d = 1/d;
+ }
+ /* else power is 0 and d is 1 */
+
+ return d;
+}
+
+/* Function to format a floating point value in ASCII with a given
+ * precision.
+ */
+void /* PRIVATE */
+png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
+ double fp, unsigned int precision)
+{
+ /* We use standard functions from math.h, but not printf because
+ * that would require stdio. The caller must supply a buffer of
+ * sufficient size or we will png_error. The tests on size and
+ * the space in ascii[] consumed are indicated below.
+ */
+ if (precision < 1)
+ precision = DBL_DIG;
+
+ /* Enforce the limit of the implementation precision too. */
+ if (precision > DBL_DIG+1)
+ precision = DBL_DIG+1;
+
+ /* Basic sanity checks */
+ if (size >= precision+5) /* See the requirements below. */
+ {
+ if (fp < 0)
+ {
+ fp = -fp;
+ *ascii++ = 45; /* '-' PLUS 1 TOTAL 1*/
+ --size;
+ }
+
+ if (fp >= DBL_MIN && fp <= DBL_MAX)
+ {
+ int exp_b10; /* A base 10 exponent */
+ double base; /* 10^exp_b10 */
+
+ /* First extract a base 10 exponent of the number,
+ * the calculation below rounds down when converting
+ * from base 2 to base 10 (multiply by log10(2) -
+ * 0.3010, but 77/256 is 0.3008, so exp_b10 needs to
+ * be increased. Note that the arithmetic shift
+ * performs a floor() unlike C arithmetic - using a
+ * C multiply would break the following for negative
+ * exponents.
+ */
+ (void)frexp(fp, &exp_b10); /* exponent to base 2 */
+
+ exp_b10 = (exp_b10 * 77) >> 8; /* <= exponent to base 10 */
+
+ /* Avoid underflow here. */
+ base = png_pow10(exp_b10); /* May underflow */
+
+ while (base < DBL_MIN || base < fp)
+ {
+ /* And this may overflow. */
+ double test = png_pow10(exp_b10+1);
+
+ if (test <= DBL_MAX)
+ ++exp_b10, base = test;
+
+ else
+ break;
+ }
+
+ /* Normalize fp and correct exp_b10, after this fp is in the
+ * range [.1,1) and exp_b10 is both the exponent and the digit
+ * *before* which the decimal point should be inserted
+ * (starting with 0 for the first digit). Note that this
+ * works even if 10^exp_b10 is out of range because of the
+ * test on DBL_MAX above.
+ */
+ fp /= base;
+ while (fp >= 1) fp /= 10, ++exp_b10;
+
+ /* Because of the code above fp may, at this point, be
+ * less than .1, this is ok because the code below can
+ * handle the leading zeros this generates, so no attempt
+ * is made to correct that here.
+ */
+
+ {
+ int czero, clead, cdigits;
+ char exponent[10];
+
+ /* Allow up to two leading zeros - this will not lengthen
+ * the number compared to using E-n.
+ */
+ if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */
+ {
+ czero = -exp_b10; /* PLUS 2 digits: TOTAL 3 */
+ exp_b10 = 0; /* Dot added below before first output. */
+ }
+ else
+ czero = 0; /* No zeros to add */
+
+ /* Generate the digit list, stripping trailing zeros and
+ * inserting a '.' before a digit if the exponent is 0.
+ */
+ clead = czero; /* Count of leading zeros */
+ cdigits = 0; /* Count of digits in list. */
+
+ do
+ {
+ double d;
+
+ fp *= 10;
+ /* Use modf here, not floor and subtract, so that
+ * the separation is done in one step. At the end
+ * of the loop don't break the number into parts so
+ * that the final digit is rounded.
+ */
+ if (cdigits+czero-clead+1 < (int)precision)
+ fp = modf(fp, &d);
+
+ else
+ {
+ d = floor(fp + .5);
+
+ if (d > 9)
+ {
+ /* Rounding up to 10, handle that here. */
+ if (czero > 0)
+ {
+ --czero, d = 1;
+ if (cdigits == 0) --clead;
+ }
+ else
+ {
+ while (cdigits > 0 && d > 9)
+ {
+ int ch = *--ascii;
+
+ if (exp_b10 != (-1))
+ ++exp_b10;
+
+ else if (ch == 46)
+ {
+ ch = *--ascii, ++size;
+ /* Advance exp_b10 to '1', so that the
+ * decimal point happens after the
+ * previous digit.
+ */
+ exp_b10 = 1;
+ }
+
+ --cdigits;
+ d = ch - 47; /* I.e. 1+(ch-48) */
+ }
+
+ /* Did we reach the beginning? If so adjust the
+ * exponent but take into account the leading
+ * decimal point.
+ */
+ if (d > 9) /* cdigits == 0 */
+ {
+ if (exp_b10 == (-1))
+ {
+ /* Leading decimal point (plus zeros?), if
+ * we lose the decimal point here it must
+ * be reentered below.
+ */
+ int ch = *--ascii;
+
+ if (ch == 46)
+ ++size, exp_b10 = 1;
+
+ /* Else lost a leading zero, so 'exp_b10' is
+ * still ok at (-1)
+ */
+ }
+ else
+ ++exp_b10;
+
+ /* In all cases we output a '1' */
+ d = 1;
+ }
+ }
+ }
+ fp = 0; /* Guarantees termination below. */
+ }
+
+ if (d == 0)
+ {
+ ++czero;
+ if (cdigits == 0) ++clead;
+ }
+ else
+ {
+ /* Included embedded zeros in the digit count. */
+ cdigits += czero - clead;
+ clead = 0;
+
+ while (czero > 0)
+ {
+ /* exp_b10 == (-1) means we just output the decimal
+ * place - after the DP don't adjust 'exp_b10' any
+ * more!
+ */
+ if (exp_b10 != (-1))
+ {
+ if (exp_b10 == 0) *ascii++ = 46, --size;
+ /* PLUS 1: TOTAL 4 */
+ --exp_b10;
+ }
+ *ascii++ = 48, --czero;
+ }
+
+ if (exp_b10 != (-1))
+ {
+ if (exp_b10 == 0) *ascii++ = 46, --size; /* counted
+ above */
+ --exp_b10;
+ }
+ *ascii++ = (char)(48 + (int)d), ++cdigits;
+ }
+ }
+ while (cdigits+czero-clead < (int)precision && fp > DBL_MIN);
+
+ /* The total output count (max) is now 4+precision */
+
+ /* Check for an exponent, if we don't need one we are
+ * done and just need to terminate the string. At
+ * this point exp_b10==(-1) is effectively if flag - it got
+ * to '-1' because of the decrement after outputing
+ * the decimal point above (the exponent required is
+ * *not* -1!)
+ */
+ if (exp_b10 >= (-1) && exp_b10 <= 2)
+ {
+ /* The following only happens if we didn't output the
+ * leading zeros above for negative exponent, so this
+ * doest add to the digit requirement. Note that the
+ * two zeros here can only be output if the two leading
+ * zeros were *not* output, so this doesn't increase
+ * the output count.
+ */
+ while (--exp_b10 >= 0) *ascii++ = 48;
+
+ *ascii = 0;
+
+ /* Total buffer requirement (including the '\0') is
+ * 5+precision - see check at the start.
+ */
+ return;
+ }
+
+ /* Here if an exponent is required, adjust size for
+ * the digits we output but did not count. The total
+ * digit output here so far is at most 1+precision - no
+ * decimal point and no leading or trailing zeros have
+ * been output.
+ */
+ size -= cdigits;
+
+ *ascii++ = 69, --size; /* 'E': PLUS 1 TOTAL 2+precision*/
+ if (exp_b10 < 0)
+ {
+ *ascii++ = 45, --size; /* '-': PLUS 1 TOTAL 3+precision */
+ exp_b10 = -exp_b10;
+ }
+
+ cdigits = 0;
+
+ while (exp_b10 > 0)
+ {
+ exponent[cdigits++] = (char)(48 + exp_b10 % 10);
+ exp_b10 /= 10;
+ }
+
+ /* Need another size check here for the exponent digits, so
+ * this need not be considered above.
+ */
+ if ((int)size > cdigits)
+ {
+ while (cdigits > 0) *ascii++ = exponent[--cdigits];
+
+ *ascii = 0;
+
+ return;
+ }
+ }
+ }
+ else if (!(fp >= DBL_MIN))
+ {
+ *ascii++ = 48; /* '0' */
+ *ascii = 0;
+ return;
+ }
+ else
+ {
+ *ascii++ = 105; /* 'i' */
+ *ascii++ = 110; /* 'n' */
+ *ascii++ = 102; /* 'f' */
+ *ascii = 0;
+ return;
+ }
+ }
+
+ /* Here on buffer too small. */
+ png_error(png_ptr, "ASCII conversion buffer too small");
+}
+
+# endif /* FLOATING_POINT */
+
+# ifdef PNG_FIXED_POINT_SUPPORTED
+/* Function to format a fixed point value in ASCII.
+ */
+void /* PRIVATE */
+png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size,
+ png_fixed_point fp)
+{
+ /* Require space for 10 decimal digits, a decimal point, a minus sign and a
+ * trailing \0, 13 characters:
+ */
+ if (size > 12)
+ {
+ png_uint_32 num;
+
+ /* Avoid overflow here on the minimum integer. */
+ if (fp < 0)
+ *ascii++ = 45, --size, num = -fp;
+ else
+ num = fp;
+
+ if (num <= 0x80000000U) /* else overflowed */
+ {
+ unsigned int ndigits = 0, first = 16/*flag value*/;
+ char digits[10];
+
+ while (num)
+ {
+ /* Split the low digit off num: */
+ unsigned int tmp = num/10;
+ num -= tmp*10;
+ digits[ndigits++] = (char)(48 + num);
+ /* Record the first non-zero digit, note that this is a number
+ * starting at 1, it's not actually the array index.
+ */
+ if (first == 16 && num > 0)
+ first = ndigits;
+ num = tmp;
+ }
+
+ if (ndigits > 0)
+ {
+ while (ndigits > 5) *ascii++ = digits[--ndigits];
+ /* The remaining digits are fractional digits, ndigits is '5' or
+ * smaller at this point. It is certainly not zero. Check for a
+ * non-zero fractional digit:
+ */
+ if (first <= 5)
+ {
+ unsigned int i;
+ *ascii++ = 46; /* decimal point */
+ /* ndigits may be <5 for small numbers, output leading zeros
+ * then ndigits digits to first:
+ */
+ i = 5;
+ while (ndigits < i) *ascii++ = 48, --i;
+ while (ndigits >= first) *ascii++ = digits[--ndigits];
+ /* Don't output the trailing zeros! */
+ }
+ }
+ else
+ *ascii++ = 48;
+
+ /* And null terminate the string: */
+ *ascii = 0;
+ return;
+ }
+ }
+
+ /* Here on buffer too small. */
+ png_error(png_ptr, "ASCII conversion buffer too small");
+}
+# endif /* FIXED_POINT */
+#endif /* READ_SCAL */
+
+#if defined(PNG_FLOATING_POINT_SUPPORTED) && \
+ !defined(PNG_FIXED_POINT_MACRO_SUPPORTED)
+png_fixed_point
+png_fixed(png_structp png_ptr, double fp, png_const_charp text)
+{
+ double r = floor(100000 * fp + .5);
+
+ if (r > 2147483647. || r < -2147483648.)
+ png_fixed_error(png_ptr, text);
+
+ return (png_fixed_point)r;
+}
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || \
+ defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED)
+/* muldiv functions */
+/* This API takes signed arguments and rounds the result to the nearest
+ * integer (or, for a fixed point number - the standard argument - to
+ * the nearest .00001). Overflow and divide by zero are signalled in
+ * the result, a boolean - true on success, false on overflow.
+ */
+int
+png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
+ png_int_32 divisor)
+{
+ /* Return a * times / divisor, rounded. */
+ if (divisor != 0)
+ {
+ if (a == 0 || times == 0)
+ {
+ *res = 0;
+ return 1;
+ }
+ else
+ {
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = a;
+ r *= times;
+ r /= divisor;
+ r = floor(r+.5);
+
+ /* A png_fixed_point is a 32 bit integer. */
+ if (r <= 2147483647. && r >= -2147483648.)
+ {
+ *res = (png_fixed_point)r;
+ return 1;
+ }
+#else
+ int negative = 0;
+ png_uint_32 A, T, D;
+ png_uint_32 s16, s32, s00;
+
+ if (a < 0)
+ negative = 1, A = -a;
+ else
+ A = a;
+
+ if (times < 0)
+ negative = !negative, T = -times;
+ else
+ T = times;
+
+ if (divisor < 0)
+ negative = !negative, D = -divisor;
+ else
+ D = divisor;
+
+ /* Following can't overflow because the arguments only
+ * have 31 bits each, however the result may be 32 bits.
+ */
+ s16 = (A >> 16) * (T & 0xffff) +
+ (A & 0xffff) * (T >> 16);
+ /* Can't overflow because the a*times bit is only 30
+ * bits at most.
+ */
+ s32 = (A >> 16) * (T >> 16) + (s16 >> 16);
+ s00 = (A & 0xffff) * (T & 0xffff);
+
+ s16 = (s16 & 0xffff) << 16;
+ s00 += s16;
+
+ if (s00 < s16)
+ ++s32; /* carry */
+
+ if (s32 < D) /* else overflow */
+ {
+ /* s32.s00 is now the 64 bit product, do a standard
+ * division, we know that s32 < D, so the maximum
+ * required shift is 31.
+ */
+ int bitshift = 32;
+ png_fixed_point result = 0; /* NOTE: signed */
+
+ while (--bitshift >= 0)
+ {
+ png_uint_32 d32, d00;
+
+ if (bitshift > 0)
+ d32 = D >> (32-bitshift), d00 = D << bitshift;
+
+ else
+ d32 = 0, d00 = D;
+
+ if (s32 > d32)
+ {
+ if (s00 < d00) --s32; /* carry */
+ s32 -= d32, s00 -= d00, result += 1<<bitshift;
+ }
+
+ else
+ if (s32 == d32 && s00 >= d00)
+ s32 = 0, s00 -= d00, result += 1<<bitshift;
+ }
+
+ /* Handle the rounding. */
+ if (s00 >= (D >> 1))
+ ++result;
+
+ if (negative)
+ result = -result;
+
+ /* Check for overflow. */
+ if ((negative && result <= 0) || (!negative && result >= 0))
+ {
+ *res = result;
+ return 1;
+ }
+ }
+#endif
+ }
+ }
+
+ return 0;
+}
+#endif /* READ_GAMMA || INCH_CONVERSIONS */
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
+/* The following is for when the caller doesn't much care about the
+ * result.
+ */
+png_fixed_point
+png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times,
+ png_int_32 divisor)
+{
+ png_fixed_point result;
+
+ if (png_muldiv(&result, a, times, divisor))
+ return result;
+
+ png_warning(png_ptr, "fixed point overflow ignored");
+ return 0;
+}
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gammma */
+/* Calculate a reciprocal, return 0 on div-by-zero or overflow. */
+png_fixed_point
+png_reciprocal(png_fixed_point a)
+{
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = floor(1E10/a+.5);
+
+ if (r <= 2147483647. && r >= -2147483648.)
+ return (png_fixed_point)r;
+#else
+ png_fixed_point res;
+
+ if (png_muldiv(&res, 100000, 100000, a))
+ return res;
+#endif
+
+ return 0; /* error/overflow */
+}
+
+/* A local convenience routine. */
+static png_fixed_point
+png_product2(png_fixed_point a, png_fixed_point b)
+{
+ /* The required result is 1/a * 1/b; the following preserves accuracy. */
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = a * 1E-5;
+ r *= b;
+ r = floor(r+.5);
+
+ if (r <= 2147483647. && r >= -2147483648.)
+ return (png_fixed_point)r;
+#else
+ png_fixed_point res;
+
+ if (png_muldiv(&res, a, b, 100000))
+ return res;
+#endif
+
+ return 0; /* overflow */
+}
+
+/* The inverse of the above. */
+png_fixed_point
+png_reciprocal2(png_fixed_point a, png_fixed_point b)
+{
+ /* The required result is 1/a * 1/b; the following preserves accuracy. */
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = 1E15/a;
+ r /= b;
+ r = floor(r+.5);
+
+ if (r <= 2147483647. && r >= -2147483648.)
+ return (png_fixed_point)r;
+#else
+ /* This may overflow because the range of png_fixed_point isn't symmetric,
+ * but this API is only used for the product of file and screen gamma so it
+ * doesn't matter that the smallest number it can produce is 1/21474, not
+ * 1/100000
+ */
+ png_fixed_point res = png_product2(a, b);
+
+ if (res != 0)
+ return png_reciprocal(res);
+#endif
+
+ return 0; /* overflow */
+}
+#endif /* READ_GAMMA */
+
+#ifdef PNG_CHECK_cHRM_SUPPORTED
+/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2,
+ * 2010: moved from pngset.c) */
+/*
+ * Multiply two 32-bit numbers, V1 and V2, using 32-bit
+ * arithmetic, to produce a 64 bit result in the HI/LO words.
+ *
+ * A B
+ * x C D
+ * ------
+ * AD || BD
+ * AC || CB || 0
+ *
+ * where A and B are the high and low 16-bit words of V1,
+ * C and D are the 16-bit words of V2, AD is the product of
+ * A and D, and X || Y is (X << 16) + Y.
+*/
+
+void /* PRIVATE */
+png_64bit_product (long v1, long v2, unsigned long *hi_product,
+ unsigned long *lo_product)
+{
+ int a, b, c, d;
+ long lo, hi, x, y;
+
+ a = (v1 >> 16) & 0xffff;
+ b = v1 & 0xffff;
+ c = (v2 >> 16) & 0xffff;
+ d = v2 & 0xffff;
+
+ lo = b * d; /* BD */
+ x = a * d + c * b; /* AD + CB */
+ y = ((lo >> 16) & 0xffff) + x;
+
+ lo = (lo & 0xffff) | ((y & 0xffff) << 16);
+ hi = (y >> 16) & 0xffff;
+
+ hi += a * c; /* AC */
+
+ *hi_product = (unsigned long)hi;
+ *lo_product = (unsigned long)lo;
+}
+#endif /* CHECK_cHRM */
+
+#ifdef PNG_READ_GAMMA_SUPPORTED /* gamma table code */
+#ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED
+/* Fixed point gamma.
+ *
+ * To calculate gamma this code implements fast log() and exp() calls using only
+ * fixed point arithmetic. This code has sufficient precision for either 8 or
+ * 16 bit sample values.
+ *
+ * The tables used here were calculated using simple 'bc' programs, but C double
+ * precision floating point arithmetic would work fine. The programs are given
+ * at the head of each table.
+ *
+ * 8 bit log table
+ * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to
+ * 255, so it's the base 2 logarithm of a normalized 8 bit floating point
+ * mantissa. The numbers are 32 bit fractions.
+ */
+static png_uint_32
+png_8bit_l2[128] =
+{
+# if PNG_DO_BC
+ for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; }
+# endif
+ 4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U,
+ 3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U,
+ 3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U,
+ 3455425220U, 3413129301U, 3371120137U, 3329393864U, 3287946700U, 3246774933U,
+ 3205874930U, 3165243125U, 3124876025U, 3084770202U, 3044922296U, 3005329011U,
+ 2965987113U, 2926893432U, 2888044853U, 2849438323U, 2811070844U, 2772939474U,
+ 2735041326U, 2697373562U, 2659933400U, 2622718104U, 2585724991U, 2548951424U,
+ 2512394810U, 2476052606U, 2439922311U, 2404001468U, 2368287663U, 2332778523U,
+ 2297471715U, 2262364947U, 2227455964U, 2192742551U, 2158222529U, 2123893754U,
+ 2089754119U, 2055801552U, 2022034013U, 1988449497U, 1955046031U, 1921821672U,
+ 1888774511U, 1855902668U, 1823204291U, 1790677560U, 1758320682U, 1726131893U,
+ 1694109454U, 1662251657U, 1630556815U, 1599023271U, 1567649391U, 1536433567U,
+ 1505374214U, 1474469770U, 1443718700U, 1413119487U, 1382670639U, 1352370686U,
+ 1322218179U, 1292211689U, 1262349810U, 1232631153U, 1203054352U, 1173618059U,
+ 1144320946U, 1115161701U, 1086139034U, 1057251672U, 1028498358U, 999877854U,
+ 971388940U, 943030410U, 914801076U, 886699767U, 858725327U, 830876614U,
+ 803152505U, 775551890U, 748073672U, 720716771U, 693480120U, 666362667U,
+ 639363374U, 612481215U, 585715177U, 559064263U, 532527486U, 506103872U,
+ 479792461U, 453592303U, 427502463U, 401522014U, 375650043U, 349885648U,
+ 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U,
+ 172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U,
+ 24347096U, 0U
+#if 0
+ /* The following are the values for 16 bit tables - these work fine for the 8
+ * bit conversions but produce very slightly larger errors in the 16 bit log
+ * (about 1.2 as opposed to 0.7 absolute error in the final value). To use
+ * these all the shifts below must be adjusted appropriately.
+ */
+ 65166, 64430, 63700, 62976, 62257, 61543, 60835, 60132, 59434, 58741, 58054,
+ 57371, 56693, 56020, 55352, 54689, 54030, 53375, 52726, 52080, 51439, 50803,
+ 50170, 49542, 48918, 48298, 47682, 47070, 46462, 45858, 45257, 44661, 44068,
+ 43479, 42894, 42312, 41733, 41159, 40587, 40020, 39455, 38894, 38336, 37782,
+ 37230, 36682, 36137, 35595, 35057, 34521, 33988, 33459, 32932, 32408, 31887,
+ 31369, 30854, 30341, 29832, 29325, 28820, 28319, 27820, 27324, 26830, 26339,
+ 25850, 25364, 24880, 24399, 23920, 23444, 22970, 22499, 22029, 21562, 21098,
+ 20636, 20175, 19718, 19262, 18808, 18357, 17908, 17461, 17016, 16573, 16132,
+ 15694, 15257, 14822, 14390, 13959, 13530, 13103, 12678, 12255, 11834, 11415,
+ 10997, 10582, 10168, 9756, 9346, 8937, 8531, 8126, 7723, 7321, 6921, 6523,
+ 6127, 5732, 5339, 4947, 4557, 4169, 3782, 3397, 3014, 2632, 2251, 1872, 1495,
+ 1119, 744, 372
+#endif
+};
+
+static png_int_32
+png_log8bit(unsigned int x)
+{
+ unsigned int lg2 = 0;
+ /* Each time 'x' is multiplied by 2, 1 must be subtracted off the final log,
+ * because the log is actually negate that means adding 1. The final
+ * returned value thus has the range 0 (for 255 input) to 7.994 (for 1
+ * input), return 7.99998 for the overflow (log 0) case - so the result is
+ * always at most 19 bits.
+ */
+ if ((x &= 0xff) == 0)
+ return 0xffffffff;
+
+ if ((x & 0xf0) == 0)
+ lg2 = 4, x <<= 4;
+
+ if ((x & 0xc0) == 0)
+ lg2 += 2, x <<= 2;
+
+ if ((x & 0x80) == 0)
+ lg2 += 1, x <<= 1;
+
+ /* result is at most 19 bits, so this cast is safe: */
+ return (png_int_32)((lg2 << 16) + ((png_8bit_l2[x-128]+32768)>>16));
+}
+
+/* The above gives exact (to 16 binary places) log2 values for 8 bit images,
+ * for 16 bit images we use the most significant 8 bits of the 16 bit value to
+ * get an approximation then multiply the approximation by a correction factor
+ * determined by the remaining up to 8 bits. This requires an additional step
+ * in the 16 bit case.
+ *
+ * We want log2(value/65535), we have log2(v'/255), where:
+ *
+ * value = v' * 256 + v''
+ * = v' * f
+ *
+ * So f is value/v', which is equal to (256+v''/v') since v' is in the range 128
+ * to 255 and v'' is in the range 0 to 255 f will be in the range 256 to less
+ * than 258. The final factor also needs to correct for the fact that our 8 bit
+ * value is scaled by 255, whereas the 16 bit values must be scaled by 65535.
+ *
+ * This gives a final formula using a calculated value 'x' which is value/v' and
+ * scaling by 65536 to match the above table:
+ *
+ * log2(x/257) * 65536
+ *
+ * Since these numbers are so close to '1' we can use simple linear
+ * interpolation between the two end values 256/257 (result -368.61) and 258/257
+ * (result 367.179). The values used below are scaled by a further 64 to give
+ * 16 bit precision in the interpolation:
+ *
+ * Start (256): -23591
+ * Zero (257): 0
+ * End (258): 23499
+ */
+static png_int_32
+png_log16bit(png_uint_32 x)
+{
+ unsigned int lg2 = 0;
+
+ /* As above, but now the input has 16 bits. */
+ if ((x &= 0xffff) == 0)
+ return 0xffffffff;
+
+ if ((x & 0xff00) == 0)
+ lg2 = 8, x <<= 8;
+
+ if ((x & 0xf000) == 0)
+ lg2 += 4, x <<= 4;
+
+ if ((x & 0xc000) == 0)
+ lg2 += 2, x <<= 2;
+
+ if ((x & 0x8000) == 0)
+ lg2 += 1, x <<= 1;
+
+ /* Calculate the base logarithm from the top 8 bits as a 28 bit fractional
+ * value.
+ */
+ lg2 <<= 28;
+ lg2 += (png_8bit_l2[(x>>8)-128]+8) >> 4;
+
+ /* Now we need to interpolate the factor, this requires a division by the top
+ * 8 bits. Do this with maximum precision.
+ */
+ x = ((x << 16) + (x >> 9)) / (x >> 8);
+
+ /* Since we divided by the top 8 bits of 'x' there will be a '1' at 1<<24,
+ * the value at 1<<16 (ignoring this) will be 0 or 1; this gives us exactly
+ * 16 bits to interpolate to get the low bits of the result. Round the
+ * answer. Note that the end point values are scaled by 64 to retain overall
+ * precision and that 'lg2' is current scaled by an extra 12 bits, so adjust
+ * the overall scaling by 6-12. Round at every step.
+ */
+ x -= 1U << 24;
+
+ if (x <= 65536U) /* <= '257' */
+ lg2 += ((23591U * (65536U-x)) + (1U << (16+6-12-1))) >> (16+6-12);
+
+ else
+ lg2 -= ((23499U * (x-65536U)) + (1U << (16+6-12-1))) >> (16+6-12);
+
+ /* Safe, because the result can't have more than 20 bits: */
+ return (png_int_32)((lg2 + 2048) >> 12);
+}
+
+/* The 'exp()' case must invert the above, taking a 20 bit fixed point
+ * logarithmic value and returning a 16 or 8 bit number as appropriate. In
+ * each case only the low 16 bits are relevant - the fraction - since the
+ * integer bits (the top 4) simply determine a shift.
+ *
+ * The worst case is the 16 bit distinction between 65535 and 65534, this
+ * requires perhaps spurious accuracty in the decoding of the logarithm to
+ * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance
+ * of getting this accuracy in practice.
+ *
+ * To deal with this the following exp() function works out the exponent of the
+ * frational part of the logarithm by using an accurate 32 bit value from the
+ * top four fractional bits then multiplying in the remaining bits.
+ */
+static png_uint_32
+png_32bit_exp[16] =
+{
+# if PNG_DO_BC
+ for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; }
+# endif
+ /* NOTE: the first entry is deliberately set to the maximum 32 bit value. */
+ 4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U,
+ 3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U,
+ 2553802834U, 2445529972U, 2341847524U, 2242560872U
+};
+
+/* Adjustment table; provided to explain the numbers in the code below. */
+#if PNG_DO_BC
+for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"}
+ 11 44937.64284865548751208448
+ 10 45180.98734845585101160448
+ 9 45303.31936980687359311872
+ 8 45364.65110595323018870784
+ 7 45395.35850361789624614912
+ 6 45410.72259715102037508096
+ 5 45418.40724413220722311168
+ 4 45422.25021786898173001728
+ 3 45424.17186732298419044352
+ 2 45425.13273269940811464704
+ 1 45425.61317555035558641664
+ 0 45425.85339951654943850496
+#endif
+
+static png_uint_32
+png_exp(png_fixed_point x)
+{
+ if (x > 0 && x <= 0xfffff) /* Else overflow or zero (underflow) */
+ {
+ /* Obtain a 4 bit approximation */
+ png_uint_32 e = png_32bit_exp[(x >> 12) & 0xf];
+
+ /* Incorporate the low 12 bits - these decrease the returned value by
+ * multiplying by a number less than 1 if the bit is set. The multiplier
+ * is determined by the above table and the shift. Notice that the values
+ * converge on 45426 and this is used to allow linear interpolation of the
+ * low bits.
+ */
+ if (x & 0x800)
+ e -= (((e >> 16) * 44938U) + 16U) >> 5;
+
+ if (x & 0x400)
+ e -= (((e >> 16) * 45181U) + 32U) >> 6;
+
+ if (x & 0x200)
+ e -= (((e >> 16) * 45303U) + 64U) >> 7;
+
+ if (x & 0x100)
+ e -= (((e >> 16) * 45365U) + 128U) >> 8;
+
+ if (x & 0x080)
+ e -= (((e >> 16) * 45395U) + 256U) >> 9;
+
+ if (x & 0x040)
+ e -= (((e >> 16) * 45410U) + 512U) >> 10;
+
+ /* And handle the low 6 bits in a single block. */
+ e -= (((e >> 16) * 355U * (x & 0x3fU)) + 256U) >> 9;
+
+ /* Handle the upper bits of x. */
+ e >>= x >> 16;
+ return e;
+ }
+
+ /* Check for overflow */
+ if (x <= 0)
+ return png_32bit_exp[0];
+
+ /* Else underflow */
+ return 0;
+}
+
+static png_byte
+png_exp8bit(png_fixed_point lg2)
+{
+ /* Get a 32 bit value: */
+ png_uint_32 x = png_exp(lg2);
+
+ /* Convert the 32 bit value to 0..255 by multiplying by 256-1, note that the
+ * second, rounding, step can't overflow because of the first, subtraction,
+ * step.
+ */
+ x -= x >> 8;
+ return (png_byte)((x + 0x7fffffU) >> 24);
+}
+
+static png_uint_16
+png_exp16bit(png_fixed_point lg2)
+{
+ /* Get a 32 bit value: */
+ png_uint_32 x = png_exp(lg2);
+
+ /* Convert the 32 bit value to 0..65535 by multiplying by 65536-1: */
+ x -= x >> 16;
+ return (png_uint_16)((x + 32767U) >> 16);
+}
+#endif /* FLOATING_ARITHMETIC */
+
+png_byte
+png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val)
+{
+ if (value > 0 && value < 255)
+ {
+# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = floor(255*pow(value/255.,gamma_val*.00001)+.5);
+ return (png_byte)r;
+# else
+ png_int_32 lg2 = png_log8bit(value);
+ png_fixed_point res;
+
+ if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1))
+ return png_exp8bit(res);
+
+ /* Overflow. */
+ value = 0;
+# endif
+ }
+
+ return (png_byte)value;
+}
+
+png_uint_16
+png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val)
+{
+ if (value > 0 && value < 65535)
+ {
+# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = floor(65535*pow(value/65535.,gamma_val*.00001)+.5);
+ return (png_uint_16)r;
+# else
+ png_int_32 lg2 = png_log16bit(value);
+ png_fixed_point res;
+
+ if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1))
+ return png_exp16bit(res);
+
+ /* Overflow. */
+ value = 0;
+# endif
+ }
+
+ return (png_uint_16)value;
+}
+
+/* This does the right thing based on the bit_depth field of the
+ * png_struct, interpreting values as 8 or 16 bit. While the result
+ * is nominally a 16 bit value if bit depth is 8 then the result is
+ * 8 bit (as are the arguments.)
+ */
+png_uint_16 /* PRIVATE */
+png_gamma_correct(png_structp png_ptr, unsigned int value,
+ png_fixed_point gamma_val)
+{
+ if (png_ptr->bit_depth == 8)
+ return png_gamma_8bit_correct(value, gamma_val);
+
+ else
+ return png_gamma_16bit_correct(value, gamma_val);
+}
+
+/* This is the shared test on whether a gamma value is 'significant' - whether
+ * it is worth doing gamma correction.
+ */
+int /* PRIVATE */
+png_gamma_significant(png_fixed_point gamma_val)
+{
+ return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED ||
+ gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED;
+}
+
+/* Internal function to build a single 16 bit table - the table consists of
+ * 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount
+ * to shift the input values right (or 16-number_of_signifiant_bits).
+ *
+ * The caller is responsible for ensuring that the table gets cleaned up on
+ * png_error (i.e. if one of the mallocs below fails) - i.e. the *table argument
+ * should be somewhere that will be cleaned.
+ */
+static void
+png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
+ PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val)
+{
+ /* Various values derived from 'shift': */
+ PNG_CONST unsigned int num = 1U << (8U - shift);
+ PNG_CONST unsigned int max = (1U << (16U - shift))-1U;
+ PNG_CONST unsigned int max_by_2 = 1U << (15U-shift);
+ unsigned int i;
+
+ png_uint_16pp table = *ptable =
+ (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p));
+
+ for (i = 0; i < num; i++)
+ {
+ png_uint_16p sub_table = table[i] =
+ (png_uint_16p)png_malloc(png_ptr, 256 * png_sizeof(png_uint_16));
+
+ /* The 'threshold' test is repeated here because it can arise for one of
+ * the 16 bit tables even if the others don't hit it.
+ */
+ if (png_gamma_significant(gamma_val))
+ {
+ /* The old code would overflow at the end and this would cause the
+ * 'pow' function to return a result >1, resulting in an
+ * arithmetic error. This code follows the spec exactly; ig is
+ * the recovered input sample, it always has 8-16 bits.
+ *
+ * We want input * 65535/max, rounded, the arithmetic fits in 32
+ * bits (unsigned) so long as max <= 32767.
+ */
+ unsigned int j;
+ for (j = 0; j < 256; j++)
+ {
+ png_uint_32 ig = (j << (8-shift)) + i;
+# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ /* Inline the 'max' scaling operation: */
+ double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5);
+ sub_table[j] = (png_uint_16)d;
+# else
+ if (shift)
+ ig = (ig * 65535U + max_by_2)/max;
+
+ sub_table[j] = png_gamma_16bit_correct(ig, gamma_val);
+# endif
+ }
+ }
+ else
+ {
+ /* We must still build a table, but do it the fast way. */
+ unsigned int j;
+
+ for (j = 0; j < 256; j++)
+ {
+ png_uint_32 ig = (j << (8-shift)) + i;
+
+ if (shift)
+ ig = (ig * 65535U + max_by_2)/max;
+
+ sub_table[j] = (png_uint_16)ig;
+ }
+ }
+ }
+}
+
+/* NOTE: this function expects the *inverse* of the overall gamma transformation
+ * required.
+ */
+static void
+png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable,
+ PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val)
+{
+ PNG_CONST unsigned int num = 1U << (8U - shift);
+ PNG_CONST unsigned int max = (1U << (16U - shift))-1U;
+ unsigned int i;
+ png_uint_32 last;
+
+ png_uint_16pp table = *ptable =
+ (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p));
+
+ /* 'num' is the number of tables and also the number of low bits of low
+ * bits of the input 16 bit value used to select a table. Each table is
+ * itself index by the high 8 bits of the value.
+ */
+ for (i = 0; i < num; i++)
+ table[i] = (png_uint_16p)png_malloc(png_ptr,
+ 256 * png_sizeof(png_uint_16));
+
+ /* 'gamma_val' is set to the reciprocal of the value calculated above, so
+ * pow(out,g) is an *input* value. 'last' is the last input value set.
+ *
+ * In the loop 'i' is used to find output values. Since the output is 8
+ * bit there are only 256 possible values. The tables are set up to
+ * select the closest possible output value for each input by finding
+ * the input value at the boundary between each pair of output values
+ * and filling the table up to that boundary with the lower output
+ * value.
+ *
+ * The boundary values are 0.5,1.5..253.5,254.5. Since these are 9 bit
+ * values the code below uses a 16 bit value in i; the values start at
+ * 128.5 (for 0.5) and step by 257, for a total of 254 values (the last
+ * entries are filled with 255). Start i at 128 and fill all 'last'
+ * table entries <= 'max'
+ */
+ last = 0;
+ for (i = 0; i < 255; ++i) /* 8 bit output value */
+ {
+ /* Find the corresponding maximum input value */
+ png_uint_16 out = (png_uint_16)(i * 257U); /* 16 bit output value */
+
+ /* Find the boundary value in 16 bits: */
+ png_uint_32 bound = png_gamma_16bit_correct(out+128U, gamma_val);
+
+ /* Adjust (round) to (16-shift) bits: */
+ bound = (bound * max + 32768U)/65535U + 1U;
+
+ while (last < bound)
+ {
+ table[last & (0xffU >> shift)][last >> (8U - shift)] = out;
+ last++;
+ }
+ }
+
+ /* And fill in the final entries. */
+ while (last < (num << 8))
+ {
+ table[last & (0xff >> shift)][last >> (8U - shift)] = 65535U;
+ last++;
+ }
+}
+
+/* Build a single 8 bit table: same as the 16 bit case but much simpler (and
+ * typically much faster). Note that libpng currently does no sBIT processing
+ * (apparently contrary to the spec) so a 256 entry table is always generated.
+ */
+static void
+png_build_8bit_table(png_structp png_ptr, png_bytepp ptable,
+ PNG_CONST png_fixed_point gamma_val)
+{
+ unsigned int i;
+ png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256);
+
+ if (png_gamma_significant(gamma_val)) for (i=0; i<256; i++)
+ table[i] = png_gamma_8bit_correct(i, gamma_val);
+
+ else for (i=0; i<256; ++i)
+ table[i] = (png_byte)i;
+}
+
+/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit
+ * tables, we don't make a full table if we are reducing to 8-bit in
+ * the future. Note also how the gamma_16 tables are segmented so that
+ * we don't need to allocate > 64K chunks for a full 16-bit table.
+ */
+void /* PRIVATE */
+png_build_gamma_table(png_structp png_ptr, int bit_depth)
+{
+ png_debug(1, "in png_build_gamma_table");
+
+ if (bit_depth <= 8)
+ {
+ png_build_8bit_table(png_ptr, &png_ptr->gamma_table,
+ png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma,
+ png_ptr->screen_gamma) : PNG_FP_1);
+
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
+ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
+ if (png_ptr->transformations & ((PNG_BACKGROUND) | PNG_RGB_TO_GRAY))
+ {
+ png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1,
+ png_reciprocal(png_ptr->gamma));
+
+ png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1,
+ png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) :
+ png_ptr->gamma/* Probably doing rgb_to_gray */);
+ }
+#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
+ }
+ else
+ {
+ png_byte shift, sig_bit;
+
+ if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
+ {
+ sig_bit = png_ptr->sig_bit.red;
+
+ if (png_ptr->sig_bit.green > sig_bit)
+ sig_bit = png_ptr->sig_bit.green;
+
+ if (png_ptr->sig_bit.blue > sig_bit)
+ sig_bit = png_ptr->sig_bit.blue;
+ }
+ else
+ sig_bit = png_ptr->sig_bit.gray;
+
+ /* 16 bit gamma code uses this equation:
+ *
+ * ov = table[(iv & 0xff) >> gamma_shift][iv >> 8]
+ *
+ * Where 'iv' is the input color value and 'ov' is the output value -
+ * pow(iv, gamma).
+ *
+ * Thus the gamma table consists of up to 256 256 entry tables. The table
+ * is selected by the (8-gamma_shift) most significant of the low 8 bits of
+ * the color value then indexed by the upper 8 bits:
+ *
+ * table[low bits][high 8 bits]
+ *
+ * So the table 'n' corresponds to all those 'iv' of:
+ *
+ * <all high 8 bit values><n << gamma_shift>..<(n+1 << gamma_shift)-1>
+ *
+ */
+ if (sig_bit > 0 && sig_bit < 16U)
+ shift = (png_byte)(16U - sig_bit); /* shift == insignificant bits */
+
+ else
+ shift = 0; /* keep all 16 bits */
+
+ if (png_ptr->transformations & PNG_16_TO_8)
+ {
+ /* PNG_MAX_GAMMA_8 is the number of bits to keep - effectively
+ * the significant bits in the *input* when the output will
+ * eventually be 8 bits. By default it is 11.
+ */
+ if (shift < (16U - PNG_MAX_GAMMA_8))
+ shift = (16U - PNG_MAX_GAMMA_8);
+ }
+
+ if (shift > 8U)
+ shift = 8U; /* Guarantees at least one table! */
+
+ png_ptr->gamma_shift = shift;
+
+#ifdef PNG_16BIT_SUPPORTED
+ if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND))
+#endif
+ png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift,
+ png_ptr->screen_gamma > 0 ? png_product2(png_ptr->gamma,
+ png_ptr->screen_gamma) : PNG_FP_1);
+
+#ifdef PNG_16BIT_SUPPORTED
+ else
+ png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift,
+ png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma,
+ png_ptr->screen_gamma) : PNG_FP_1);
+#endif
+
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
+ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
+ if (png_ptr->transformations & (PNG_BACKGROUND | PNG_RGB_TO_GRAY))
+ {
+ png_build_16bit_table(png_ptr, &png_ptr->gamma_16_to_1, shift,
+ png_reciprocal(png_ptr->gamma));
+
+ /* Notice that the '16 from 1' table should be full precision, however
+ * the lookup on this table still uses gamma_shift, so it can't be.
+ * TODO: fix this.
+ */
+ png_build_16bit_table(png_ptr, &png_ptr->gamma_16_from_1, shift,
+ png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) :
+ png_ptr->gamma/* Probably doing rgb_to_gray */);
+ }
+#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
+ }
+}
+#endif /* READ_GAMMA */
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
--- /dev/null
+
+/* png.h - header file for PNG reference library
+ *
+ * libpng version 1.5.2 - March 31, 2011
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license (See LICENSE, below)
+ *
+ * Authors and maintainers:
+ * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
+ * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
+ * libpng versions 0.97, January 1998, through 1.5.2 - March 31, 2011: Glenn
+ * See also "Contributing Authors", below.
+ *
+ * Note about libpng version numbers:
+ *
+ * Due to various miscommunications, unforeseen code incompatibilities
+ * and occasional factors outside the authors' control, version numbering
+ * on the library has not always been consistent and straightforward.
+ * The following table summarizes matters since version 0.89c, which was
+ * the first widely used release:
+ *
+ * source png.h png.h shared-lib
+ * version string int version
+ * ------- ------ ----- ----------
+ * 0.89c "1.0 beta 3" 0.89 89 1.0.89
+ * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90]
+ * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95]
+ * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96]
+ * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97]
+ * 0.97c 0.97 97 2.0.97
+ * 0.98 0.98 98 2.0.98
+ * 0.99 0.99 98 2.0.99
+ * 0.99a-m 0.99 99 2.0.99
+ * 1.00 1.00 100 2.1.0 [100 should be 10000]
+ * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000]
+ * 1.0.1 png.h string is 10001 2.1.0
+ * 1.0.1a-e identical to the 10002 from here on, the shared library
+ * 1.0.2 source version) 10002 is 2.V where V is the source code
+ * 1.0.2a-b 10003 version, except as noted.
+ * 1.0.3 10003
+ * 1.0.3a-d 10004
+ * 1.0.4 10004
+ * 1.0.4a-f 10005
+ * 1.0.5 (+ 2 patches) 10005
+ * 1.0.5a-d 10006
+ * 1.0.5e-r 10100 (not source compatible)
+ * 1.0.5s-v 10006 (not binary compatible)
+ * 1.0.6 (+ 3 patches) 10006 (still binary incompatible)
+ * 1.0.6d-f 10007 (still binary incompatible)
+ * 1.0.6g 10007
+ * 1.0.6h 10007 10.6h (testing xy.z so-numbering)
+ * 1.0.6i 10007 10.6i
+ * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0)
+ * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible)
+ * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible)
+ * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible)
+ * 1.0.7 1 10007 (still compatible)
+ * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4
+ * 1.0.8rc1 1 10008 2.1.0.8rc1
+ * 1.0.8 1 10008 2.1.0.8
+ * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6
+ * 1.0.9rc1 1 10009 2.1.0.9rc1
+ * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10
+ * 1.0.9rc2 1 10009 2.1.0.9rc2
+ * 1.0.9 1 10009 2.1.0.9
+ * 1.0.10beta1 1 10010 2.1.0.10beta1
+ * 1.0.10rc1 1 10010 2.1.0.10rc1
+ * 1.0.10 1 10010 2.1.0.10
+ * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3
+ * 1.0.11rc1 1 10011 2.1.0.11rc1
+ * 1.0.11 1 10011 2.1.0.11
+ * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2
+ * 1.0.12rc1 2 10012 2.1.0.12rc1
+ * 1.0.12 2 10012 2.1.0.12
+ * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned)
+ * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2
+ * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5
+ * 1.2.0rc1 3 10200 3.1.2.0rc1
+ * 1.2.0 3 10200 3.1.2.0
+ * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4
+ * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2
+ * 1.2.1 3 10201 3.1.2.1
+ * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6
+ * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1
+ * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1
+ * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1
+ * 1.0.13 10 10013 10.so.0.1.0.13
+ * 1.2.2 12 10202 12.so.0.1.2.2
+ * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6
+ * 1.2.3 12 10203 12.so.0.1.2.3
+ * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3
+ * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1
+ * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1
+ * 1.0.14 10 10014 10.so.0.1.0.14
+ * 1.2.4 13 10204 12.so.0.1.2.4
+ * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2
+ * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3
+ * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3
+ * 1.0.15 10 10015 10.so.0.1.0.15
+ * 1.2.5 13 10205 12.so.0.1.2.5
+ * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4
+ * 1.0.16 10 10016 10.so.0.1.0.16
+ * 1.2.6 13 10206 12.so.0.1.2.6
+ * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2
+ * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1
+ * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1
+ * 1.0.17 10 10017 12.so.0.1.0.17
+ * 1.2.7 13 10207 12.so.0.1.2.7
+ * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5
+ * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5
+ * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5
+ * 1.0.18 10 10018 12.so.0.1.0.18
+ * 1.2.8 13 10208 12.so.0.1.2.8
+ * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3
+ * 1.2.9beta4-11 13 10209 12.so.0.9[.0]
+ * 1.2.9rc1 13 10209 12.so.0.9[.0]
+ * 1.2.9 13 10209 12.so.0.9[.0]
+ * 1.2.10beta1-7 13 10210 12.so.0.10[.0]
+ * 1.2.10rc1-2 13 10210 12.so.0.10[.0]
+ * 1.2.10 13 10210 12.so.0.10[.0]
+ * 1.4.0beta1-5 14 10400 14.so.0.0[.0]
+ * 1.2.11beta1-4 13 10211 12.so.0.11[.0]
+ * 1.4.0beta7-8 14 10400 14.so.0.0[.0]
+ * 1.2.11 13 10211 12.so.0.11[.0]
+ * 1.2.12 13 10212 12.so.0.12[.0]
+ * 1.4.0beta9-14 14 10400 14.so.0.0[.0]
+ * 1.2.13 13 10213 12.so.0.13[.0]
+ * 1.4.0beta15-36 14 10400 14.so.0.0[.0]
+ * 1.4.0beta37-87 14 10400 14.so.14.0[.0]
+ * 1.4.0rc01 14 10400 14.so.14.0[.0]
+ * 1.4.0beta88-109 14 10400 14.so.14.0[.0]
+ * 1.4.0rc02-08 14 10400 14.so.14.0[.0]
+ * 1.4.0 14 10400 14.so.14.0[.0]
+ * 1.4.1beta01-03 14 10401 14.so.14.1[.0]
+ * 1.4.1rc01 14 10401 14.so.14.1[.0]
+ * 1.4.1beta04-12 14 10401 14.so.14.1[.0]
+ * 1.4.1 14 10401 14.so.14.1[.0]
+ * 1.4.2 14 10402 14.so.14.2[.0]
+ * 1.4.3 14 10403 14.so.14.3[.0]
+ * 1.4.4 14 10404 14.so.14.4[.0]
+ * 1.5.0beta01-58 15 10500 15.so.15.0[.0]
+ * 1.5.0rc01-07 15 10500 15.so.15.0[.0]
+ * 1.5.0 15 10500 15.so.15.0[.0]
+ * 1.5.1beta01-11 15 10501 15.so.15.1[.0]
+ * 1.5.1rc01-02 15 10501 15.so.15.1[.0]
+ * 1.5.1 15 10501 15.so.15.1[.0]
+ * 1.5.2beta01-03 15 10502 15.so.15.2[.0]
+ * 1.5.2rc01-03 15 10502 15.so.15.2[.0]
+ * 1.5.2 15 10502 15.so.15.2[.0]
+ *
+ * Henceforth the source version will match the shared-library major
+ * and minor numbers; the shared-library major version number will be
+ * used for changes in backward compatibility, as it is intended. The
+ * PNG_LIBPNG_VER macro, which is not used within libpng but is available
+ * for applications, is an unsigned integer of the form xyyzz corresponding
+ * to the source version x.y.z (leading zeros in y and z). Beta versions
+ * were given the previous public release number plus a letter, until
+ * version 1.0.6j; from then on they were given the upcoming public
+ * release number plus "betaNN" or "rcN".
+ *
+ * Binary incompatibility exists only when applications make direct access
+ * to the info_ptr or png_ptr members through png.h, and the compiled
+ * application is loaded with a different version of the library.
+ *
+ * DLLNUM will change each time there are forward or backward changes
+ * in binary compatibility (e.g., when a new feature is added).
+ *
+ * See libpng-manual.txt or libpng.3 for more information. The PNG
+ * specification is available as a W3C Recommendation and as an ISO
+ * Specification, <http://www.w3.org/TR/2003/REC-PNG-20031110/
+ */
+
+/*
+ * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
+ *
+ * If you modify libpng you may insert additional notices immediately following
+ * this sentence.
+ *
+ * This code is released under the libpng license.
+ *
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.2, March 31, 2011, are
+ * Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
+ * distributed according to the same disclaimer and license as libpng-1.2.5
+ * with the following individual added to the list of Contributing Authors:
+ *
+ * Cosmin Truta
+ *
+ * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are
+ * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
+ * distributed according to the same disclaimer and license as libpng-1.0.6
+ * with the following individuals added to the list of Contributing Authors:
+ *
+ * Simon-Pierre Cadieux
+ * Eric S. Raymond
+ * Gilles Vollant
+ *
+ * and with the following additions to the disclaimer:
+ *
+ * There is no warranty against interference with your enjoyment of the
+ * library or against infringement. There is no warranty that our
+ * efforts or the library will fulfill any of your particular purposes
+ * or needs. This library is provided with all faults, and the entire
+ * risk of satisfactory quality, performance, accuracy, and effort is with
+ * the user.
+ *
+ * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
+ * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are
+ * distributed according to the same disclaimer and license as libpng-0.96,
+ * with the following individuals added to the list of Contributing Authors:
+ *
+ * Tom Lane
+ * Glenn Randers-Pehrson
+ * Willem van Schaik
+ *
+ * libpng versions 0.89, June 1996, through 0.96, May 1997, are
+ * Copyright (c) 1996, 1997 Andreas Dilger
+ * Distributed according to the same disclaimer and license as libpng-0.88,
+ * with the following individuals added to the list of Contributing Authors:
+ *
+ * John Bowler
+ * Kevin Bracey
+ * Sam Bushell
+ * Magnus Holmgren
+ * Greg Roelofs
+ * Tom Tanner
+ *
+ * libpng versions 0.5, May 1995, through 0.88, January 1996, are
+ * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
+ *
+ * For the purposes of this copyright and license, "Contributing Authors"
+ * is defined as the following set of individuals:
+ *
+ * Andreas Dilger
+ * Dave Martindale
+ * Guy Eric Schalnat
+ * Paul Schmidt
+ * Tim Wegner
+ *
+ * The PNG Reference Library is supplied "AS IS". The Contributing Authors
+ * and Group 42, Inc. disclaim all warranties, expressed or implied,
+ * including, without limitation, the warranties of merchantability and of
+ * fitness for any purpose. The Contributing Authors and Group 42, Inc.
+ * assume no liability for direct, indirect, incidental, special, exemplary,
+ * or consequential damages, which may result from the use of the PNG
+ * Reference Library, even if advised of the possibility of such damage.
+ *
+ * Permission is hereby granted to use, copy, modify, and distribute this
+ * source code, or portions hereof, for any purpose, without fee, subject
+ * to the following restrictions:
+ *
+ * 1. The origin of this source code must not be misrepresented.
+ *
+ * 2. Altered versions must be plainly marked as such and must not
+ * be misrepresented as being the original source.
+ *
+ * 3. This Copyright notice may not be removed or altered from
+ * any source or altered source distribution.
+ *
+ * The Contributing Authors and Group 42, Inc. specifically permit, without
+ * fee, and encourage the use of this source code as a component to
+ * supporting the PNG file format in commercial products. If you use this
+ * source code in a product, acknowledgment is not required but would be
+ * appreciated.
+ */
+
+/*
+ * A "png_get_copyright" function is available, for convenient use in "about"
+ * boxes and the like:
+ *
+ * printf("%s", png_get_copyright(NULL));
+ *
+ * Also, the PNG logo (in PNG format, of course) is supplied in the
+ * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
+ */
+
+/*
+ * Libpng is OSI Certified Open Source Software. OSI Certified is a
+ * certification mark of the Open Source Initiative.
+ */
+
+/*
+ * The contributing authors would like to thank all those who helped
+ * with testing, bug fixes, and patience. This wouldn't have been
+ * possible without all of you.
+ *
+ * Thanks to Frank J. T. Wojcik for helping with the documentation.
+ */
+
+/*
+ * Y2K compliance in libpng:
+ * =========================
+ *
+ * March 31, 2011
+ *
+ * Since the PNG Development group is an ad-hoc body, we can't make
+ * an official declaration.
+ *
+ * This is your unofficial assurance that libpng from version 0.71 and
+ * upward through 1.5.2 are Y2K compliant. It is my belief that
+ * earlier versions were also Y2K compliant.
+ *
+ * Libpng only has three year fields. One is a 2-byte unsigned integer
+ * that will hold years up to 65535. The other two hold the date in text
+ * format, and will hold years up to 9999.
+ *
+ * The integer is
+ * "png_uint_16 year" in png_time_struct.
+ *
+ * The strings are
+ * "png_charp time_buffer" in png_struct and
+ * "near_time_buffer", which is a local character string in png.c.
+ *
+ * There are seven time-related functions:
+ * png.c: png_convert_to_rfc_1123() in png.c
+ * (formerly png_convert_to_rfc_1152() in error)
+ * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c
+ * png_convert_from_time_t() in pngwrite.c
+ * png_get_tIME() in pngget.c
+ * png_handle_tIME() in pngrutil.c, called in pngread.c
+ * png_set_tIME() in pngset.c
+ * png_write_tIME() in pngwutil.c, called in pngwrite.c
+ *
+ * All handle dates properly in a Y2K environment. The
+ * png_convert_from_time_t() function calls gmtime() to convert from system
+ * clock time, which returns (year - 1900), which we properly convert to
+ * the full 4-digit year. There is a possibility that applications using
+ * libpng are not passing 4-digit years into the png_convert_to_rfc_1123()
+ * function, or that they are incorrectly passing only a 2-digit year
+ * instead of "year - 1900" into the png_convert_from_struct_tm() function,
+ * but this is not under our control. The libpng documentation has always
+ * stated that it works with 4-digit years, and the APIs have been
+ * documented as such.
+ *
+ * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned
+ * integer to hold the year, and can hold years as large as 65535.
+ *
+ * zlib, upon which libpng depends, is also Y2K compliant. It contains
+ * no date-related code.
+ *
+ * Glenn Randers-Pehrson
+ * libpng maintainer
+ * PNG Development Group
+ */
+
+#ifndef PNG_H
+#define PNG_H
+
+/* This is not the place to learn how to use libpng. The file libpng-manual.txt
+ * describes how to use libpng, and the file example.c summarizes it
+ * with some code on which to build. This file is useful for looking
+ * at the actual function definitions and structure components.
+ */
+
+/* Version information for png.h - this should match the version in png.c */
+#define PNG_LIBPNG_VER_STRING "1.5.2"
+#define PNG_HEADER_VERSION_STRING \
+ " libpng version 1.5.2 - March 31, 2011\n"
+
+#define PNG_LIBPNG_VER_SONUM 15
+#define PNG_LIBPNG_VER_DLLNUM 15
+
+/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
+#define PNG_LIBPNG_VER_MAJOR 1
+#define PNG_LIBPNG_VER_MINOR 5
+#define PNG_LIBPNG_VER_RELEASE 2
+/* This should match the numeric part of the final component of
+ * PNG_LIBPNG_VER_STRING, omitting any leading zero:
+ */
+
+#define PNG_LIBPNG_VER_BUILD 0
+
+/* Release Status */
+#define PNG_LIBPNG_BUILD_ALPHA 1
+#define PNG_LIBPNG_BUILD_BETA 2
+#define PNG_LIBPNG_BUILD_RC 3
+#define PNG_LIBPNG_BUILD_STABLE 4
+#define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7
+
+/* Release-Specific Flags */
+#define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with
+ PNG_LIBPNG_BUILD_STABLE only */
+#define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with
+ PNG_LIBPNG_BUILD_SPECIAL */
+#define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
+ PNG_LIBPNG_BUILD_PRIVATE */
+
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
+
+/* Careful here. At one time, Guy wanted to use 082, but that would be octal.
+ * We must not include leading zeros.
+ * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
+ * version 1.0.0 was mis-numbered 100 instead of 10000). From
+ * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
+ */
+#define PNG_LIBPNG_VER 10502 /* 1.5.2 */
+
+/* Library configuration: these options cannot be changed after
+ * the library has been built.
+ */
+#ifndef PNGLCONF_H
+ /* If pnglibconf.h is missing, you can
+ * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h
+ */
+# include "pnglibconf.h"
+#endif
+
+#ifndef PNG_VERSION_INFO_ONLY
+# ifndef PNG_BUILDING_SYMBOL_TABLE
+ /*
+ * Standard header files (not needed for the version info or while
+ * building symbol table -- see scripts/pnglibconf.dfa)
+ */
+# ifdef PNG_SETJMP_SUPPORTED
+# include <setjmp.h>
+# endif
+
+ /* Need the time information for converting tIME chunks, it
+ * defines struct tm:
+ */
+# ifdef PNG_CONVERT_tIME_SUPPORTED
+ /* "time.h" functions are not supported on all operating systems */
+# include <time.h>
+# endif
+# endif
+
+/* Machine specific configuration. */
+# include "pngconf.h"
+#endif
+
+/*
+ * Added at libpng-1.2.8
+ *
+ * Ref MSDN: Private as priority over Special
+ * VS_FF_PRIVATEBUILD File *was not* built using standard release
+ * procedures. If this value is given, the StringFileInfo block must
+ * contain a PrivateBuild string.
+ *
+ * VS_FF_SPECIALBUILD File *was* built by the original company using
+ * standard release procedures but is a variation of the standard
+ * file of the same version number. If this value is given, the
+ * StringFileInfo block must contain a SpecialBuild string.
+ */
+
+#ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */
+# define PNG_LIBPNG_BUILD_TYPE \
+ (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
+#else
+# ifdef PNG_LIBPNG_SPECIALBUILD
+# define PNG_LIBPNG_BUILD_TYPE \
+ (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
+# else
+# define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
+# endif
+#endif
+
+#ifndef PNG_VERSION_INFO_ONLY
+
+/* Inhibit C++ name-mangling for libpng functions but not for system calls. */
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* Version information for C files, stored in png.c. This had better match
+ * the version above.
+ */
+#define png_libpng_ver png_get_header_ver(NULL)
+
+/* This file is arranged in several sections:
+ *
+ * 1. Any configuration options that can be specified by for the application
+ * code when it is built. (Build time configuration is in pnglibconf.h)
+ * 2. Type definitions (base types are defined in pngconf.h), structure
+ * definitions.
+ * 3. Exported library functions.
+ *
+ * The library source code has additional files (principally pngpriv.h) that
+ * allow configuration of the library.
+ */
+/* Section 1: run time configuration
+ * See pnglibconf.h for build time configuration
+ *
+ * Run time configuration allows the application to choose between
+ * implementations of certain arithmetic APIs. The default is set
+ * at build time and recorded in pnglibconf.h, but it is safe to
+ * override these (and only these) settings. Note that this won't
+ * change what the library does, only application code, and the
+ * settings can (and probably should) be made on a per-file basis
+ * by setting the #defines before including png.h
+ *
+ * Use macros to read integers from PNG data or use the exported
+ * functions?
+ * PNG_USE_READ_MACROS: use the macros (see below) Note that
+ * the macros evaluate their argument multiple times.
+ * PNG_NO_USE_READ_MACROS: call the relevant library function.
+ *
+ * Use the alternative algorithm for compositing alpha samples that
+ * does not use division?
+ * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division'
+ * algorithm.
+ * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm.
+ *
+ * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is
+ * false?
+ * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error
+ * APIs to png_warning.
+ * Otherwise the calls are mapped to png_error.
+ */
+
+/* Section 2: type definitions, including structures and compile time
+ * constants.
+ * See pngconf.h for base types that vary by machine/system
+ */
+
+/* This triggers a compiler error in png.c, if png.c and png.h
+ * do not agree upon the version number.
+ */
+typedef char* png_libpng_version_1_5_2;
+
+/* Three color definitions. The order of the red, green, and blue, (and the
+ * exact size) is not important, although the size of the fields need to
+ * be png_byte or png_uint_16 (as defined below).
+ */
+typedef struct png_color_struct
+{
+ png_byte red;
+ png_byte green;
+ png_byte blue;
+} png_color;
+typedef png_color FAR * png_colorp;
+typedef PNG_CONST png_color FAR * png_const_colorp;
+typedef png_color FAR * FAR * png_colorpp;
+
+typedef struct png_color_16_struct
+{
+ png_byte index; /* used for palette files */
+ png_uint_16 red; /* for use in red green blue files */
+ png_uint_16 green;
+ png_uint_16 blue;
+ png_uint_16 gray; /* for use in grayscale files */
+} png_color_16;
+typedef png_color_16 FAR * png_color_16p;
+typedef PNG_CONST png_color_16 FAR * png_const_color_16p;
+typedef png_color_16 FAR * FAR * png_color_16pp;
+
+typedef struct png_color_8_struct
+{
+ png_byte red; /* for use in red green blue files */
+ png_byte green;
+ png_byte blue;
+ png_byte gray; /* for use in grayscale files */
+ png_byte alpha; /* for alpha channel files */
+} png_color_8;
+typedef png_color_8 FAR * png_color_8p;
+typedef PNG_CONST png_color_8 FAR * png_const_color_8p;
+typedef png_color_8 FAR * FAR * png_color_8pp;
+
+/*
+ * The following two structures are used for the in-core representation
+ * of sPLT chunks.
+ */
+typedef struct png_sPLT_entry_struct
+{
+ png_uint_16 red;
+ png_uint_16 green;
+ png_uint_16 blue;
+ png_uint_16 alpha;
+ png_uint_16 frequency;
+} png_sPLT_entry;
+typedef png_sPLT_entry FAR * png_sPLT_entryp;
+typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp;
+typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp;
+
+/* When the depth of the sPLT palette is 8 bits, the color and alpha samples
+ * occupy the LSB of their respective members, and the MSB of each member
+ * is zero-filled. The frequency member always occupies the full 16 bits.
+ */
+
+typedef struct png_sPLT_struct
+{
+ png_charp name; /* palette name */
+ png_byte depth; /* depth of palette samples */
+ png_sPLT_entryp entries; /* palette entries */
+ png_int_32 nentries; /* number of palette entries */
+} png_sPLT_t;
+typedef png_sPLT_t FAR * png_sPLT_tp;
+typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp;
+typedef png_sPLT_t FAR * FAR * png_sPLT_tpp;
+
+#ifdef PNG_TEXT_SUPPORTED
+/* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file,
+ * and whether that contents is compressed or not. The "key" field
+ * points to a regular zero-terminated C string. The "text", "lang", and
+ * "lang_key" fields can be regular C strings, empty strings, or NULL pointers.
+ * However, the * structure returned by png_get_text() will always contain
+ * regular zero-terminated C strings (possibly empty), never NULL pointers,
+ * so they can be safely used in printf() and other string-handling functions.
+ */
+typedef struct png_text_struct
+{
+ int compression; /* compression value:
+ -1: tEXt, none
+ 0: zTXt, deflate
+ 1: iTXt, none
+ 2: iTXt, deflate */
+ png_charp key; /* keyword, 1-79 character description of "text" */
+ png_charp text; /* comment, may be an empty string (ie "")
+ or a NULL pointer */
+ png_size_t text_length; /* length of the text string */
+ png_size_t itxt_length; /* length of the itxt string */
+ png_charp lang; /* language code, 0-79 characters
+ or a NULL pointer */
+ png_charp lang_key; /* keyword translated UTF-8 string, 0 or more
+ chars or a NULL pointer */
+} png_text;
+typedef png_text FAR * png_textp;
+typedef PNG_CONST png_text FAR * png_const_textp;
+typedef png_text FAR * FAR * png_textpp;
+#endif
+
+/* Supported compression types for text in PNG files (tEXt, and zTXt).
+ * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */
+#define PNG_TEXT_COMPRESSION_NONE_WR -3
+#define PNG_TEXT_COMPRESSION_zTXt_WR -2
+#define PNG_TEXT_COMPRESSION_NONE -1
+#define PNG_TEXT_COMPRESSION_zTXt 0
+#define PNG_ITXT_COMPRESSION_NONE 1
+#define PNG_ITXT_COMPRESSION_zTXt 2
+#define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */
+
+/* png_time is a way to hold the time in an machine independent way.
+ * Two conversions are provided, both from time_t and struct tm. There
+ * is no portable way to convert to either of these structures, as far
+ * as I know. If you know of a portable way, send it to me. As a side
+ * note - PNG has always been Year 2000 compliant!
+ */
+typedef struct png_time_struct
+{
+ png_uint_16 year; /* full year, as in, 1995 */
+ png_byte month; /* month of year, 1 - 12 */
+ png_byte day; /* day of month, 1 - 31 */
+ png_byte hour; /* hour of day, 0 - 23 */
+ png_byte minute; /* minute of hour, 0 - 59 */
+ png_byte second; /* second of minute, 0 - 60 (for leap seconds) */
+} png_time;
+typedef png_time FAR * png_timep;
+typedef PNG_CONST png_time FAR * png_const_timep;
+typedef png_time FAR * FAR * png_timepp;
+
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
+ defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
+/* png_unknown_chunk is a structure to hold queued chunks for which there is
+ * no specific support. The idea is that we can use this to queue
+ * up private chunks for output even though the library doesn't actually
+ * know about their semantics.
+ */
+typedef struct png_unknown_chunk_t
+{
+ png_byte name[5];
+ png_byte *data;
+ png_size_t size;
+
+ /* libpng-using applications should NOT directly modify this byte. */
+ png_byte location; /* mode of operation at read time */
+}
+png_unknown_chunk;
+typedef png_unknown_chunk FAR * png_unknown_chunkp;
+typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp;
+typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp;
+#endif
+
+typedef struct png_info_def png_info;
+typedef png_info FAR * png_infop;
+typedef PNG_CONST png_info FAR * png_const_infop;
+typedef png_info FAR * FAR * png_infopp;
+
+/* Maximum positive integer used in PNG is (2^31)-1 */
+#define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL)
+#define PNG_UINT_32_MAX ((png_uint_32)(-1))
+#define PNG_SIZE_MAX ((png_size_t)(-1))
+
+/* These are constants for fixed point values encoded in the
+ * PNG specification manner (x100000)
+ */
+#define PNG_FP_1 100000
+#define PNG_FP_HALF 50000
+
+/* These describe the color_type field in png_info. */
+/* color type masks */
+#define PNG_COLOR_MASK_PALETTE 1
+#define PNG_COLOR_MASK_COLOR 2
+#define PNG_COLOR_MASK_ALPHA 4
+
+/* color types. Note that not all combinations are legal */
+#define PNG_COLOR_TYPE_GRAY 0
+#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
+#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR)
+#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
+#define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA)
+/* aliases */
+#define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA
+#define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA
+
+/* This is for compression type. PNG 1.0-1.2 only define the single type. */
+#define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */
+#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE
+
+/* This is for filter type. PNG 1.0-1.2 only define the single type. */
+#define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */
+#define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */
+#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE
+
+/* These are for the interlacing type. These values should NOT be changed. */
+#define PNG_INTERLACE_NONE 0 /* Non-interlaced image */
+#define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */
+#define PNG_INTERLACE_LAST 2 /* Not a valid value */
+
+/* These are for the oFFs chunk. These values should NOT be changed. */
+#define PNG_OFFSET_PIXEL 0 /* Offset in pixels */
+#define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */
+#define PNG_OFFSET_LAST 2 /* Not a valid value */
+
+/* These are for the pCAL chunk. These values should NOT be changed. */
+#define PNG_EQUATION_LINEAR 0 /* Linear transformation */
+#define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */
+#define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */
+#define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */
+#define PNG_EQUATION_LAST 4 /* Not a valid value */
+
+/* These are for the sCAL chunk. These values should NOT be changed. */
+#define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */
+#define PNG_SCALE_METER 1 /* meters per pixel */
+#define PNG_SCALE_RADIAN 2 /* radians per pixel */
+#define PNG_SCALE_LAST 3 /* Not a valid value */
+
+/* These are for the pHYs chunk. These values should NOT be changed. */
+#define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */
+#define PNG_RESOLUTION_METER 1 /* pixels/meter */
+#define PNG_RESOLUTION_LAST 2 /* Not a valid value */
+
+/* These are for the sRGB chunk. These values should NOT be changed. */
+#define PNG_sRGB_INTENT_PERCEPTUAL 0
+#define PNG_sRGB_INTENT_RELATIVE 1
+#define PNG_sRGB_INTENT_SATURATION 2
+#define PNG_sRGB_INTENT_ABSOLUTE 3
+#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */
+
+/* This is for text chunks */
+#define PNG_KEYWORD_MAX_LENGTH 79
+
+/* Maximum number of entries in PLTE/sPLT/tRNS arrays */
+#define PNG_MAX_PALETTE_LENGTH 256
+
+/* These determine if an ancillary chunk's data has been successfully read
+ * from the PNG header, or if the application has filled in the corresponding
+ * data in the info_struct to be written into the output file. The values
+ * of the PNG_INFO_<chunk> defines should NOT be changed.
+ */
+#define PNG_INFO_gAMA 0x0001
+#define PNG_INFO_sBIT 0x0002
+#define PNG_INFO_cHRM 0x0004
+#define PNG_INFO_PLTE 0x0008
+#define PNG_INFO_tRNS 0x0010
+#define PNG_INFO_bKGD 0x0020
+#define PNG_INFO_hIST 0x0040
+#define PNG_INFO_pHYs 0x0080
+#define PNG_INFO_oFFs 0x0100
+#define PNG_INFO_tIME 0x0200
+#define PNG_INFO_pCAL 0x0400
+#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */
+#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */
+#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */
+#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */
+#define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */
+
+/* This is used for the transformation routines, as some of them
+ * change these values for the row. It also should enable using
+ * the routines for other purposes.
+ */
+typedef struct png_row_info_struct
+{
+ png_uint_32 width; /* width of row */
+ png_size_t rowbytes; /* number of bytes in row */
+ png_byte color_type; /* color type of row */
+ png_byte bit_depth; /* bit depth of row */
+ png_byte channels; /* number of channels (1, 2, 3, or 4) */
+ png_byte pixel_depth; /* bits per pixel (depth * channels) */
+} png_row_info;
+
+typedef png_row_info FAR * png_row_infop;
+typedef png_row_info FAR * FAR * png_row_infopp;
+
+/* These are the function types for the I/O functions and for the functions
+ * that allow the user to override the default I/O functions with his or her
+ * own. The png_error_ptr type should match that of user-supplied warning
+ * and error functions, while the png_rw_ptr type should match that of the
+ * user read/write data functions. Note that the 'write' function must not
+ * modify the buffer it is passed. The 'read' function, on the other hand, is
+ * expected to return the read data in the buffer.
+ */
+typedef struct png_struct_def png_struct;
+typedef PNG_CONST png_struct FAR * png_const_structp;
+typedef png_struct FAR * png_structp;
+
+typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp));
+typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t));
+typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp));
+typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32,
+ int));
+typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32,
+ int));
+
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop));
+typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop));
+
+/* The following callback receives png_uint_32 row_number, int pass for the
+ * png_bytep data of the row. When transforming an interlaced image the
+ * row number is the row number within the sub-image of the interlace pass, so
+ * the value will increase to the height of the sub-image (not the full image)
+ * then reset to 0 for the next pass.
+ *
+ * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
+ * find the output pixel (x,y) given an interlaced sub-image pixel
+ * (row,col,pass). (See below for these macros.)
+ */
+typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep,
+ png_uint_32, int));
+#endif
+
+#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
+ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop,
+ png_bytep));
+#endif
+
+#ifdef PNG_USER_CHUNKS_SUPPORTED
+typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp,
+ png_unknown_chunkp));
+#endif
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp));
+#endif
+
+#ifdef PNG_SETJMP_SUPPORTED
+/* This must match the function definition in <setjmp.h>, and the
+ * application must include this before png.h to obtain the definition
+ * of jmp_buf. The function is required to be PNG_NORETURN. (Note that
+ * PNG_PTR_NORETURN is used here because current versions of the Microsoft
+ * C compiler do not support the PNG_NORETURN attribute on a pointer.)
+ *
+ * If you get a type warning from the compiler when linking against this line
+ * then your compiler has 'longjmp' that does not match the requirements of the
+ * compiler that built libpng. You will have to write a wrapper function for
+ * your compiler's longjmp and call png_set_longjmp_fn directly (not via the
+ * png_jmpbuf macro.)
+ *
+ * If you get a warning here while building the library you will need to make
+ * changes to ensure that pnglibconf.h records the calling convention used by
+ * your compiler. This may be very difficult - try using a different compiler
+ * to build the library!
+ */
+typedef PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)),
+ PNG_PTR_NORETURN);
+#endif
+
+/* Transform masks for the high-level interface */
+#define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */
+#define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */
+#define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */
+#define PNG_TRANSFORM_PACKING 0x0004 /* read and write */
+#define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */
+#define PNG_TRANSFORM_EXPAND 0x0010 /* read only */
+#define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */
+#define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */
+#define PNG_TRANSFORM_BGR 0x0080 /* read and write */
+#define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */
+#define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */
+#define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */
+#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */
+/* Added to libpng-1.2.34 */
+#define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER
+#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */
+/* Added to libpng-1.4.0 */
+#define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */
+
+/* Flags for MNG supported features */
+#define PNG_FLAG_MNG_EMPTY_PLTE 0x01
+#define PNG_FLAG_MNG_FILTER_64 0x04
+#define PNG_ALL_MNG_FEATURES 0x05
+
+/* NOTE: prior to 1.5 these functions had no 'API' style declaration,
+ * this allowed the zlib default functions to be used on Windows
+ * platforms. In 1.5 the zlib default malloc (which just calls malloc and
+ * ignores the first argument) should be completely compatible with the
+ * following.
+ */
+typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp,
+ png_alloc_size_t));
+typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp));
+
+typedef png_struct FAR * FAR * png_structpp;
+
+/* Section 3: exported functions
+ * Here are the function definitions most commonly used. This is not
+ * the place to find out how to use libpng. See libpng-manual.txt for the
+ * full explanation, see example.c for the summary. This just provides
+ * a simple one line description of the use of each function.
+ *
+ * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in
+ * pngconf.h and in the *.dfn files in the scripts directory.
+ *
+ * PNG_EXPORT(ordinal, type, name, (args));
+ *
+ * ordinal: ordinal that is used while building
+ * *.def files. The ordinal value is only
+ * relevant when preprocessing png.h with
+ * the *.dfn files for building symbol table
+ * entries, and are removed by pngconf.h.
+ * type: return type of the function
+ * name: function name
+ * args: function arguments, with types
+ *
+ * When we wish to append attributes to a function prototype we use
+ * the PNG_EXPORTA() macro instead.
+ *
+ * PNG_EXPORTA(ordinal, type, name, (args), attributes);
+ *
+ * ordinal, type, name, and args: same as in PNG_EXPORT().
+ * attributes: function attributes
+ */
+
+/* Returns the version number of the library */
+PNG_EXPORT(1, png_uint_32, png_access_version_number, (void));
+
+/* Tell lib we have already handled the first <num_bytes> magic bytes.
+ * Handling more than 8 bytes from the beginning of the file is an error.
+ */
+PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes));
+
+/* Check sig[start] through sig[start + num_to_check - 1] to see if it's a
+ * PNG file. Returns zero if the supplied bytes match the 8-byte PNG
+ * signature, and non-zero otherwise. Having num_to_check == 0 or
+ * start > 7 will always fail (ie return non-zero).
+ */
+PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start,
+ png_size_t num_to_check));
+
+/* Simple signature checking function. This is the same as calling
+ * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n).
+ */
+#define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n))
+
+/* Allocate and initialize png_ptr struct for reading, and any other memory. */
+PNG_EXPORTA(4, png_structp, png_create_read_struct,
+ (png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn),
+ PNG_ALLOCATED);
+
+/* Allocate and initialize png_ptr struct for writing, and any other memory */
+PNG_EXPORTA(5, png_structp, png_create_write_struct,
+ (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
+ png_error_ptr warn_fn),
+ PNG_ALLOCATED);
+
+PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size,
+ (png_const_structp png_ptr));
+
+PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr,
+ png_size_t size));
+
+/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp
+ * match up.
+ */
+#ifdef PNG_SETJMP_SUPPORTED
+/* This function returns the jmp_buf built in to *png_ptr. It must be
+ * supplied with an appropriate 'longjmp' function to use on that jmp_buf
+ * unless the default error function is overridden in which case NULL is
+ * acceptable. The size of the jmp_buf is checked against the actual size
+ * allocated by the library - the call will return NULL on a mismatch
+ * indicating an ABI mismatch.
+ */
+PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr,
+ png_longjmp_ptr longjmp_fn, size_t jmp_buf_size));
+# define png_jmpbuf(png_ptr) \
+ (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf)))
+#else
+# define png_jmpbuf(png_ptr) \
+ (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP)
+#endif
+/* This function should be used by libpng applications in place of
+ * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it
+ * will use it; otherwise it will call PNG_ABORT(). This function was
+ * added in libpng-1.5.0.
+ */
+PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val),
+ PNG_NORETURN);
+
+#ifdef PNG_READ_SUPPORTED
+/* Reset the compression stream */
+PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr));
+#endif
+
+/* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */
+#ifdef PNG_USER_MEM_SUPPORTED
+PNG_EXPORTA(11, png_structp, png_create_read_struct_2,
+ (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
+ png_error_ptr warn_fn,
+ png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),
+ PNG_ALLOCATED);
+PNG_EXPORTA(12, png_structp, png_create_write_struct_2,
+ (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
+ png_error_ptr warn_fn,
+ png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),
+ PNG_ALLOCATED);
+#endif
+
+/* Write the PNG file signature. */
+PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr));
+
+/* Write a PNG chunk - size, type, (optional) data, CRC. */
+PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep
+ chunk_name, png_const_bytep data, png_size_t length));
+
+/* Write the start of a PNG chunk - length and chunk name. */
+PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr,
+ png_const_bytep chunk_name, png_uint_32 length));
+
+/* Write the data of a PNG chunk started with png_write_chunk_start(). */
+PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr,
+ png_const_bytep data, png_size_t length));
+
+/* Finish a chunk started with png_write_chunk_start() (includes CRC). */
+PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr));
+
+/* Allocate and initialize the info structure */
+PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr),
+ PNG_ALLOCATED);
+
+PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr,
+ png_size_t png_info_struct_size));
+
+/* Writes all the PNG information before the image. */
+PNG_EXPORT(20, void, png_write_info_before_PLTE,
+ (png_structp png_ptr, png_infop info_ptr));
+PNG_EXPORT(21, void, png_write_info,
+ (png_structp png_ptr, png_infop info_ptr));
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read the information before the actual image data. */
+PNG_EXPORT(22, void, png_read_info,
+ (png_structp png_ptr, png_infop info_ptr));
+#endif
+
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123,
+ (png_structp png_ptr,
+ png_const_timep ptime));
+#endif
+
+#ifdef PNG_CONVERT_tIME_SUPPORTED
+/* Convert from a struct tm to png_time */
+PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime,
+ PNG_CONST struct tm FAR * ttime));
+
+/* Convert from time_t to png_time. Uses gmtime() */
+PNG_EXPORT(25, void, png_convert_from_time_t,
+ (png_timep ptime, time_t ttime));
+#endif /* PNG_CONVERT_tIME_SUPPORTED */
+
+#ifdef PNG_READ_EXPAND_SUPPORTED
+/* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */
+PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr));
+PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr));
+PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr));
+PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr));
+#endif
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+/* Expand to 16 bit channels, forces conversion of palette to RGB and expansion
+ * of a tRNS chunk if present.
+ */
+PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr));
+#endif
+
+#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
+/* Use blue, green, red order for pixels. */
+PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr));
+#endif
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+/* Expand the grayscale to 24-bit RGB if necessary. */
+PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr));
+#endif
+
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+/* Reduce RGB to grayscale. */
+PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr,
+ int error_action, double red, double green));
+PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr,
+ int error_action, png_fixed_point red, png_fixed_point green));
+
+PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp
+ png_ptr));
+#endif
+
+PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth,
+ png_colorp palette));
+
+#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
+PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr));
+#endif
+
+#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
+ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
+PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr));
+#endif
+
+#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
+ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
+PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr));
+#endif
+
+#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
+/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */
+PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler,
+ int flags));
+/* The values of the PNG_FILLER_ defines should NOT be changed */
+# define PNG_FILLER_BEFORE 0
+# define PNG_FILLER_AFTER 1
+/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */
+PNG_EXPORT(40, void, png_set_add_alpha,
+ (png_structp png_ptr, png_uint_32 filler,
+ int flags));
+#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */
+
+#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
+/* Swap bytes in 16-bit depth files. */
+PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr));
+#endif
+
+#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
+/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */
+PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr));
+#endif
+
+#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \
+ defined(PNG_WRITE_PACKSWAP_SUPPORTED)
+/* Swap packing order of pixels in bytes. */
+PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr));
+#endif
+
+#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
+/* Converts files to legal bit depths. */
+PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p
+ true_bits));
+#endif
+
+#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
+ defined(PNG_WRITE_INTERLACING_SUPPORTED)
+/* Have the code handle the interlacing. Returns the number of passes.
+ * MUST be called before png_read_update_info or png_start_read_image,
+ * otherwise it will not have the desired effect. Note that it is still
+ * necessary to call png_read_row or png_read_rows png_get_image_height
+ * times for each pass.
+*/
+PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr));
+#endif
+
+#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
+/* Invert monochrome files */
+PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr));
+#endif
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+/* Handle alpha and tRNS by replacing with a background color. */
+PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, double background_gamma));
+PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, png_fixed_point background_gamma));
+#endif
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+# define PNG_BACKGROUND_GAMMA_UNKNOWN 0
+# define PNG_BACKGROUND_GAMMA_SCREEN 1
+# define PNG_BACKGROUND_GAMMA_FILE 2
+# define PNG_BACKGROUND_GAMMA_UNIQUE 3
+#endif
+
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+/* Strip the second byte of information from a 16-bit depth file. */
+PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr));
+#endif
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+/* Turn on quantizing, and reduce the palette to the number of colors
+ * available.
+ */
+PNG_EXPORT(49, void, png_set_quantize,
+ (png_structp png_ptr, png_colorp palette,
+ int num_palette, int maximum_colors, png_const_uint_16p histogram,
+ int full_quantize));
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+/* The threshold on gamma processing is configurable but hard-wired into the
+ * library. The following is the floating point variant.
+ */
+#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001)
+
+/* Handle gamma correction. Screen_gamma=(display_exponent) */
+PNG_FP_EXPORT(50, void, png_set_gamma,
+ (png_structp png_ptr, double screen_gamma,
+ double default_file_gamma));
+PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr,
+ png_fixed_point screen_gamma, png_fixed_point default_file_gamma));
+#endif
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+/* Set how many lines between output flushes - 0 for no flushing */
+PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows));
+/* Flush the current PNG output buffer */
+PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr));
+#endif
+
+/* Optional update palette with requested transformations */
+PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr));
+
+/* Optional call to update the users info structure */
+PNG_EXPORT(54, void, png_read_update_info,
+ (png_structp png_ptr, png_infop info_ptr));
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read one or more rows of image data. */
+PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row,
+ png_bytepp display_row, png_uint_32 num_rows));
+#endif
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read a row of data. */
+PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row,
+ png_bytep display_row));
+#endif
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read the whole image into memory at once. */
+PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image));
+#endif
+
+/* Write a row of image data */
+PNG_EXPORT(58, void, png_write_row,
+ (png_structp png_ptr, png_const_bytep row));
+
+/* Write a few rows of image data: (*row) is not written; however, the type
+ * is declared as writeable to maintain compatibility with previous versions
+ * of libpng and to allow the 'display_row' array from read_rows to be passed
+ * unchanged to write_rows.
+ */
+PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row,
+ png_uint_32 num_rows));
+
+/* Write the image data */
+PNG_EXPORT(60, void, png_write_image,
+ (png_structp png_ptr, png_bytepp image));
+
+/* Write the end of the PNG file. */
+PNG_EXPORT(61, void, png_write_end,
+ (png_structp png_ptr, png_infop info_ptr));
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read the end of the PNG file. */
+PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr));
+#endif
+
+/* Free any memory associated with the png_info_struct */
+PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr,
+ png_infopp info_ptr_ptr));
+
+/* Free any memory associated with the png_struct and the png_info_structs */
+PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr,
+ png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr));
+
+/* Free any memory associated with the png_struct and the png_info_structs */
+PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr,
+ png_infopp info_ptr_ptr));
+
+/* Set the libpng method of handling chunk CRC errors */
+PNG_EXPORT(66, void, png_set_crc_action,
+ (png_structp png_ptr, int crit_action, int ancil_action));
+
+/* Values for png_set_crc_action() say how to handle CRC errors in
+ * ancillary and critical chunks, and whether to use the data contained
+ * therein. Note that it is impossible to "discard" data in a critical
+ * chunk. For versions prior to 0.90, the action was always error/quit,
+ * whereas in version 0.90 and later, the action for CRC errors in ancillary
+ * chunks is warn/discard. These values should NOT be changed.
+ *
+ * value action:critical action:ancillary
+ */
+#define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */
+#define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */
+#define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */
+#define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */
+#define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */
+#define PNG_CRC_NO_CHANGE 5 /* use current value use current value */
+
+/* These functions give the user control over the scan-line filtering in
+ * libpng and the compression methods used by zlib. These functions are
+ * mainly useful for testing, as the defaults should work with most users.
+ * Those users who are tight on memory or want faster performance at the
+ * expense of compression can modify them. See the compression library
+ * header file (zlib.h) for an explination of the compression functions.
+ */
+
+/* Set the filtering method(s) used by libpng. Currently, the only valid
+ * value for "method" is 0.
+ */
+PNG_EXPORT(67, void, png_set_filter,
+ (png_structp png_ptr, int method, int filters));
+
+/* Flags for png_set_filter() to say which filters to use. The flags
+ * are chosen so that they don't conflict with real filter types
+ * below, in case they are supplied instead of the #defined constants.
+ * These values should NOT be changed.
+ */
+#define PNG_NO_FILTERS 0x00
+#define PNG_FILTER_NONE 0x08
+#define PNG_FILTER_SUB 0x10
+#define PNG_FILTER_UP 0x20
+#define PNG_FILTER_AVG 0x40
+#define PNG_FILTER_PAETH 0x80
+#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
+ PNG_FILTER_AVG | PNG_FILTER_PAETH)
+
+/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now.
+ * These defines should NOT be changed.
+ */
+#define PNG_FILTER_VALUE_NONE 0
+#define PNG_FILTER_VALUE_SUB 1
+#define PNG_FILTER_VALUE_UP 2
+#define PNG_FILTER_VALUE_AVG 3
+#define PNG_FILTER_VALUE_PAETH 4
+#define PNG_FILTER_VALUE_LAST 5
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */
+/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_
+ * defines, either the default (minimum-sum-of-absolute-differences), or
+ * the experimental method (weighted-minimum-sum-of-absolute-differences).
+ *
+ * Weights are factors >= 1.0, indicating how important it is to keep the
+ * filter type consistent between rows. Larger numbers mean the current
+ * filter is that many times as likely to be the same as the "num_weights"
+ * previous filters. This is cumulative for each previous row with a weight.
+ * There needs to be "num_weights" values in "filter_weights", or it can be
+ * NULL if the weights aren't being specified. Weights have no influence on
+ * the selection of the first row filter. Well chosen weights can (in theory)
+ * improve the compression for a given image.
+ *
+ * Costs are factors >= 1.0 indicating the relative decoding costs of a
+ * filter type. Higher costs indicate more decoding expense, and are
+ * therefore less likely to be selected over a filter with lower computational
+ * costs. There needs to be a value in "filter_costs" for each valid filter
+ * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't
+ * setting the costs. Costs try to improve the speed of decompression without
+ * unduly increasing the compressed image size.
+ *
+ * A negative weight or cost indicates the default value is to be used, and
+ * values in the range [0.0, 1.0) indicate the value is to remain unchanged.
+ * The default values for both weights and costs are currently 1.0, but may
+ * change if good general weighting/cost heuristics can be found. If both
+ * the weights and costs are set to 1.0, this degenerates the WEIGHTED method
+ * to the UNWEIGHTED method, but with added encoding time/computation.
+ */
+PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr,
+ int heuristic_method, int num_weights, png_const_doublep filter_weights,
+ png_const_doublep filter_costs));
+PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
+ (png_structp png_ptr,
+ int heuristic_method, int num_weights, png_const_fixed_point_p
+ filter_weights, png_const_fixed_point_p filter_costs));
+#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
+
+/* Heuristic used for row filter selection. These defines should NOT be
+ * changed.
+ */
+#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */
+#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */
+#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */
+#define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */
+
+/* Set the library compression level. Currently, valid values range from
+ * 0 - 9, corresponding directly to the zlib compression levels 0 - 9
+ * (0 - no compression, 9 - "maximal" compression). Note that tests have
+ * shown that zlib compression levels 3-6 usually perform as well as level 9
+ * for PNG images, and do considerably fewer caclulations. In the future,
+ * these values may not correspond directly to the zlib compression levels.
+ */
+PNG_EXPORT(69, void, png_set_compression_level,
+ (png_structp png_ptr, int level));
+
+PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr,
+ int mem_level));
+
+PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr,
+ int strategy));
+
+PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr,
+ int window_bits));
+
+PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr,
+ int method));
+
+/* These next functions are called for input/output, memory, and error
+ * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c,
+ * and call standard C I/O routines such as fread(), fwrite(), and
+ * fprintf(). These functions can be made to use other I/O routines
+ * at run time for those applications that need to handle I/O in a
+ * different manner by calling png_set_???_fn(). See libpng-manual.txt for
+ * more information.
+ */
+
+#ifdef PNG_STDIO_SUPPORTED
+/* Initialize the input/output for the PNG file to the default functions. */
+PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp));
+#endif
+
+/* Replace the (error and abort), and warning functions with user
+ * supplied functions. If no messages are to be printed you must still
+ * write and use replacement functions. The replacement error_fn should
+ * still do a longjmp to the last setjmp location if you are using this
+ * method of error handling. If error_fn or warning_fn is NULL, the
+ * default function will be used.
+ */
+
+PNG_EXPORT(75, void, png_set_error_fn,
+ (png_structp png_ptr, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warning_fn));
+
+/* Return the user pointer associated with the error functions */
+PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr));
+
+/* Replace the default data output functions with a user supplied one(s).
+ * If buffered output is not used, then output_flush_fn can be set to NULL.
+ * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time
+ * output_flush_fn will be ignored (and thus can be NULL).
+ * It is probably a mistake to use NULL for output_flush_fn if
+ * write_data_fn is not also NULL unless you have built libpng with
+ * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's
+ * default flush function, which uses the standard *FILE structure, will
+ * be used.
+ */
+PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr,
+ png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn));
+
+/* Replace the default data input function with a user supplied one. */
+PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr,
+ png_rw_ptr read_data_fn));
+
+/* Return the user pointer associated with the I/O functions */
+PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr));
+
+PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr,
+ png_read_status_ptr read_row_fn));
+
+PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr,
+ png_write_status_ptr write_row_fn));
+
+#ifdef PNG_USER_MEM_SUPPORTED
+/* Replace the default memory allocation functions with user supplied one(s). */
+PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr,
+ png_malloc_ptr malloc_fn, png_free_ptr free_fn));
+/* Return the user pointer associated with the memory functions */
+PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr));
+#endif
+
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr,
+ png_user_transform_ptr read_user_transform_fn));
+#endif
+
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr,
+ png_user_transform_ptr write_user_transform_fn));
+#endif
+
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
+PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr,
+ png_voidp user_transform_ptr, int user_transform_depth,
+ int user_transform_channels));
+/* Return the user pointer associated with the user transform functions */
+PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr,
+ (png_const_structp png_ptr));
+#endif
+
+#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
+/* Return information about the row currently being processed. Note that these
+ * APIs do not fail but will return unexpected results if called outside a user
+ * transform callback. Also note that when transforming an interlaced image the
+ * row number is the row number within the sub-image of the interlace pass, so
+ * the value will increase to the height of the sub-image (not the full image)
+ * then reset to 0 for the next pass.
+ *
+ * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
+ * find the output pixel (x,y) given an interlaced sub-image pixel
+ * (row,col,pass). (See below for these macros.)
+ */
+PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp));
+PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp));
+#endif
+
+#ifdef PNG_USER_CHUNKS_SUPPORTED
+PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr,
+ png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
+PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr));
+#endif
+
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+/* Sets the function callbacks for the push reader, and a pointer to a
+ * user-defined structure available to the callback functions.
+ */
+PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr,
+ png_voidp progressive_ptr, png_progressive_info_ptr info_fn,
+ png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn));
+
+/* Returns the user pointer associated with the push read functions */
+PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr));
+
+/* Function to be called when data becomes available */
+PNG_EXPORT(92, void, png_process_data,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_bytep buffer, png_size_t buffer_size));
+
+/* A function which may be called *only* within png_process_data to stop the
+ * processing of any more data. The function returns the number of bytes
+ * remaining, excluding any that libpng has cached internally. A subsequent
+ * call to png_process_data must supply these bytes again. If the argument
+ * 'save' is set to true the routine will first save all the pending data and
+ * will always return 0.
+ */
+PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save));
+
+/* A function which may be called *only* outside (after) a call to
+ * png_process_data. It returns the number of bytes of data to skip in the
+ * input. Normally it will return 0, but if it returns a non-zero value the
+ * application must skip than number of bytes of input data and pass the
+ * following data to the next call to png_process_data.
+ */
+PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp));
+
+/* Function that combines rows. 'new_row' is a flag that should come from
+ * the callback and be non-NULL if anything needs to be done; the library
+ * stores its own version of the new data internally and ignores the passed
+ * in value.
+ */
+PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr,
+ png_bytep old_row, png_const_bytep new_row));
+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+
+PNG_EXPORTA(94, png_voidp, png_malloc,
+ (png_structp png_ptr, png_alloc_size_t size),
+ PNG_ALLOCATED);
+/* Added at libpng version 1.4.0 */
+PNG_EXPORTA(95, png_voidp, png_calloc,
+ (png_structp png_ptr, png_alloc_size_t size),
+ PNG_ALLOCATED);
+
+/* Added at libpng version 1.2.4 */
+PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr,
+ png_alloc_size_t size), PNG_ALLOCATED);
+
+/* Frees a pointer allocated by png_malloc() */
+PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr));
+
+/* Free data that was allocated internally */
+PNG_EXPORT(98, void, png_free_data,
+ (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num));
+
+/* Reassign responsibility for freeing existing data, whether allocated
+ * by libpng or by the application */
+PNG_EXPORT(99, void, png_data_freer,
+ (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask));
+
+/* Assignments for png_data_freer */
+#define PNG_DESTROY_WILL_FREE_DATA 1
+#define PNG_SET_WILL_FREE_DATA 1
+#define PNG_USER_WILL_FREE_DATA 2
+/* Flags for png_ptr->free_me and info_ptr->free_me */
+#define PNG_FREE_HIST 0x0008
+#define PNG_FREE_ICCP 0x0010
+#define PNG_FREE_SPLT 0x0020
+#define PNG_FREE_ROWS 0x0040
+#define PNG_FREE_PCAL 0x0080
+#define PNG_FREE_SCAL 0x0100
+#define PNG_FREE_UNKN 0x0200
+#define PNG_FREE_LIST 0x0400
+#define PNG_FREE_PLTE 0x1000
+#define PNG_FREE_TRNS 0x2000
+#define PNG_FREE_TEXT 0x4000
+#define PNG_FREE_ALL 0x7fff
+#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
+
+#ifdef PNG_USER_MEM_SUPPORTED
+PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr,
+ png_alloc_size_t size), PNG_ALLOCATED);
+PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr));
+#endif
+
+#ifdef PNG_ERROR_TEXT_SUPPORTED
+/* Fatal error in PNG image of libpng - can't continue */
+PNG_EXPORTA(102, void, png_error,
+ (png_structp png_ptr, png_const_charp error_message),
+ PNG_NORETURN);
+
+/* The same, but the chunk name is prepended to the error string. */
+PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr,
+ png_const_charp error_message), PNG_NORETURN);
+
+#else
+/* Fatal error in PNG image of libpng - can't continue */
+PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN);
+#endif
+
+/* Non-fatal error in libpng. Can continue, but may have a problem. */
+PNG_EXPORT(105, void, png_warning, (png_structp png_ptr,
+ png_const_charp warning_message));
+
+/* Non-fatal error in libpng, chunk name is prepended to message. */
+PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr,
+ png_const_charp warning_message));
+
+#ifdef PNG_BENIGN_ERRORS_SUPPORTED
+/* Benign error in libpng. Can continue, but may have a problem.
+ * User can choose whether to handle as a fatal error or as a warning. */
+# undef png_benign_error
+PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr,
+ png_const_charp warning_message));
+
+/* Same, chunk name is prepended to message. */
+# undef png_chunk_benign_error
+PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr,
+ png_const_charp warning_message));
+
+PNG_EXPORT(109, void, png_set_benign_errors,
+ (png_structp png_ptr, int allowed));
+#else
+# ifdef PNG_ALLOW_BENIGN_ERRORS
+# define png_benign_error png_warning
+# define png_chunk_benign_error png_chunk_warning
+# else
+# define png_benign_error png_error
+# define png_chunk_benign_error png_chunk_error
+# endif
+#endif
+
+/* The png_set_<chunk> functions are for storing values in the png_info_struct.
+ * Similarly, the png_get_<chunk> calls are used to read values from the
+ * png_info_struct, either storing the parameters in the passed variables, or
+ * setting pointers into the png_info_struct where the data is stored. The
+ * png_get_<chunk> functions return a non-zero value if the data was available
+ * in info_ptr, or return zero and do not change any of the parameters if the
+ * data was not available.
+ *
+ * These functions should be used instead of directly accessing png_info
+ * to avoid problems with future changes in the size and internal layout of
+ * png_info_struct.
+ */
+/* Returns "flag" if chunk data is valid in info_ptr. */
+PNG_EXPORT(110, png_uint_32, png_get_valid,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 flag));
+
+/* Returns number of bytes needed to hold a transformed row. */
+PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+/* Returns row_pointers, which is an array of pointers to scanlines that was
+ * returned from png_read_png().
+ */
+PNG_EXPORT(112, png_bytepp, png_get_rows,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+/* Set row_pointers, which is an array of pointers to scanlines for use
+ * by png_write_png().
+ */
+PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr,
+ png_infop info_ptr, png_bytepp row_pointers));
+#endif
+
+/* Returns number of color channels in image. */
+PNG_EXPORT(114, png_byte, png_get_channels,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+
+#ifdef PNG_EASY_ACCESS_SUPPORTED
+/* Returns image width in pixels. */
+PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+
+/* Returns image height in pixels. */
+PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+
+/* Returns image bit_depth. */
+PNG_EXPORT(117, png_byte, png_get_bit_depth,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+
+/* Returns image color_type. */
+PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+
+/* Returns image filter_type. */
+PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+
+/* Returns image interlace_type. */
+PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+
+/* Returns image compression_type. */
+PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+
+/* Returns image resolution in pixels per meter, from pHYs chunk data. */
+PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+
+/* Returns pixel aspect ratio, computed from pHYs chunk data. */
+PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+
+/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */
+PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(128, png_int_32, png_get_x_offset_microns,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(129, png_int_32, png_get_y_offset_microns,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+
+#endif /* PNG_EASY_ACCESS_SUPPORTED */
+
+/* Returns pointer to signature string read from PNG header */
+PNG_EXPORT(130, png_const_bytep, png_get_signature,
+ (png_const_structp png_ptr, png_infop info_ptr));
+
+#ifdef PNG_bKGD_SUPPORTED
+PNG_EXPORT(131, png_uint_32, png_get_bKGD,
+ (png_const_structp png_ptr, png_infop info_ptr,
+ png_color_16p *background));
+#endif
+
+#ifdef PNG_bKGD_SUPPORTED
+PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr,
+ png_const_color_16p background));
+#endif
+
+#ifdef PNG_cHRM_SUPPORTED
+PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr,
+ png_const_infop info_ptr, double *white_x, double *white_y, double *red_x,
+ double *red_y, double *green_x, double *green_y, double *blue_x,
+ double *blue_y));
+#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */
+PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
+ (png_const_structp png_ptr,
+ png_const_infop info_ptr, png_fixed_point *int_white_x,
+ png_fixed_point *int_white_y, png_fixed_point *int_red_x,
+ png_fixed_point *int_red_y, png_fixed_point *int_green_x,
+ png_fixed_point *int_green_y, png_fixed_point *int_blue_x,
+ png_fixed_point *int_blue_y));
+#endif
+#endif
+
+#ifdef PNG_cHRM_SUPPORTED
+PNG_FP_EXPORT(135, void, png_set_cHRM,
+ (png_structp png_ptr, png_infop info_ptr,
+ double white_x, double white_y, double red_x, double red_y, double green_x,
+ double green_y, double blue_x, double blue_y));
+PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr,
+ png_infop info_ptr, png_fixed_point int_white_x,
+ png_fixed_point int_white_y, png_fixed_point int_red_x,
+ png_fixed_point int_red_y, png_fixed_point int_green_x,
+ png_fixed_point int_green_y, png_fixed_point int_blue_x,
+ png_fixed_point int_blue_y));
+#endif
+
+#ifdef PNG_gAMA_SUPPORTED
+PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ double *file_gamma));
+PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *int_file_gamma));
+#endif
+
+#ifdef PNG_gAMA_SUPPORTED
+PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr,
+ png_infop info_ptr, double file_gamma));
+PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr,
+ png_infop info_ptr, png_fixed_point int_file_gamma));
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
+PNG_EXPORT(141, png_uint_32, png_get_hIST,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_16p *hist));
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
+PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr,
+ png_infop info_ptr, png_const_uint_16p hist));
+#endif
+
+PNG_EXPORT(143, png_uint_32, png_get_IHDR,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type,
+ int *interlace_method, int *compression_method, int *filter_method));
+
+PNG_EXPORT(144, void, png_set_IHDR,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 width, png_uint_32 height, int bit_depth, int color_type,
+ int interlace_method, int compression_method, int filter_method));
+
+#ifdef PNG_oFFs_SUPPORTED
+PNG_EXPORT(145, png_uint_32, png_get_oFFs,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type));
+#endif
+
+#ifdef PNG_oFFs_SUPPORTED
+PNG_EXPORT(146, void, png_set_oFFs,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_int_32 offset_x, png_int_32 offset_y, int unit_type));
+#endif
+
+#ifdef PNG_pCAL_SUPPORTED
+PNG_EXPORT(147, png_uint_32, png_get_pCAL,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type,
+ int *nparams,
+ png_charp *units, png_charpp *params));
+#endif
+
+#ifdef PNG_pCAL_SUPPORTED
+PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr,
+ png_infop info_ptr,
+ png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
+ int nparams, png_const_charp units, png_charpp params));
+#endif
+
+#ifdef PNG_pHYs_SUPPORTED
+PNG_EXPORT(149, png_uint_32, png_get_pHYs,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
+#endif
+
+#ifdef PNG_pHYs_SUPPORTED
+PNG_EXPORT(150, void, png_set_pHYs,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 res_x, png_uint_32 res_y, int unit_type));
+#endif
+
+PNG_EXPORT(151, png_uint_32, png_get_PLTE,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_colorp *palette, int *num_palette));
+
+PNG_EXPORT(152, void, png_set_PLTE,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_colorp palette, int num_palette));
+
+#ifdef PNG_sBIT_SUPPORTED
+PNG_EXPORT(153, png_uint_32, png_get_sBIT,
+ (png_const_structp png_ptr, png_infop info_ptr,
+ png_color_8p *sig_bit));
+#endif
+
+#ifdef PNG_sBIT_SUPPORTED
+PNG_EXPORT(154, void, png_set_sBIT,
+ (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit));
+#endif
+
+#ifdef PNG_sRGB_SUPPORTED
+PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr,
+ png_const_infop info_ptr, int *file_srgb_intent));
+#endif
+
+#ifdef PNG_sRGB_SUPPORTED
+PNG_EXPORT(156, void, png_set_sRGB,
+ (png_structp png_ptr, png_infop info_ptr, int srgb_intent));
+PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr,
+ png_infop info_ptr, int srgb_intent));
+#endif
+
+#ifdef PNG_iCCP_SUPPORTED
+PNG_EXPORT(158, png_uint_32, png_get_iCCP,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_charpp name, int *compression_type, png_bytepp profile,
+ png_uint_32 *proflen));
+#endif
+
+#ifdef PNG_iCCP_SUPPORTED
+PNG_EXPORT(159, void, png_set_iCCP,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_charp name, int compression_type, png_const_bytep profile,
+ png_uint_32 proflen));
+#endif
+
+#ifdef PNG_sPLT_SUPPORTED
+PNG_EXPORT(160, png_uint_32, png_get_sPLT,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_sPLT_tpp entries));
+#endif
+
+#ifdef PNG_sPLT_SUPPORTED
+PNG_EXPORT(161, void, png_set_sPLT,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_sPLT_tp entries, int nentries));
+#endif
+
+#ifdef PNG_TEXT_SUPPORTED
+/* png_get_text also returns the number of text chunks in *num_text */
+PNG_EXPORT(162, png_uint_32, png_get_text,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_textp *text_ptr, int *num_text));
+#endif
+
+/* Note while png_set_text() will accept a structure whose text,
+ * language, and translated keywords are NULL pointers, the structure
+ * returned by png_get_text will always contain regular
+ * zero-terminated C strings. They might be empty strings but
+ * they will never be NULL pointers.
+ */
+
+#ifdef PNG_TEXT_SUPPORTED
+PNG_EXPORT(163, void, png_set_text,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_textp text_ptr, int num_text));
+#endif
+
+#ifdef PNG_tIME_SUPPORTED
+PNG_EXPORT(164, png_uint_32, png_get_tIME,
+ (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time));
+#endif
+
+#ifdef PNG_tIME_SUPPORTED
+PNG_EXPORT(165, void, png_set_tIME,
+ (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time));
+#endif
+
+#ifdef PNG_tRNS_SUPPORTED
+PNG_EXPORT(166, png_uint_32, png_get_tRNS,
+ (png_const_structp png_ptr, png_infop info_ptr,
+ png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color));
+#endif
+
+#ifdef PNG_tRNS_SUPPORTED
+PNG_EXPORT(167, void, png_set_tRNS,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_bytep trans_alpha, int num_trans,
+ png_const_color_16p trans_color));
+#endif
+
+#ifdef PNG_sCAL_SUPPORTED
+PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ int *unit, double *width, double *height));
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+/* NOTE: this API is currently implemented using floating point arithmetic,
+ * consequently it can only be used on systems with floating point support.
+ * In any case the range of values supported by png_fixed_point is small and it
+ * is highly recommended that png_get_sCAL_s be used instead.
+ */
+PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed,
+ (png_structp png_ptr, png_const_infop info_ptr, int *unit,
+ png_fixed_point *width,
+ png_fixed_point *height));
+#endif
+PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ int *unit, png_charpp swidth, png_charpp sheight));
+
+PNG_FP_EXPORT(170, void, png_set_sCAL,
+ (png_structp png_ptr, png_infop info_ptr,
+ int unit, double width, double height));
+PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr,
+ png_infop info_ptr, int unit, png_fixed_point width,
+ png_fixed_point height));
+PNG_EXPORT(171, void, png_set_sCAL_s,
+ (png_structp png_ptr, png_infop info_ptr,
+ int unit, png_const_charp swidth, png_const_charp sheight));
+#endif /* PNG_sCAL_SUPPORTED */
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+/* Provide a list of chunks and how they are to be handled, if the built-in
+ handling or default unknown chunk handling is not desired. Any chunks not
+ listed will be handled in the default manner. The IHDR and IEND chunks
+ must not be listed.
+ keep = 0: follow default behaviour
+ = 1: do not keep
+ = 2: keep only if safe-to-copy
+ = 3: keep even if unsafe-to-copy
+*/
+PNG_EXPORT(172, void, png_set_keep_unknown_chunks,
+ (png_structp png_ptr, int keep,
+ png_const_bytep chunk_list, int num_chunks));
+PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr,
+ png_const_bytep chunk_name));
+#endif
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr,
+ png_infop info_ptr, png_const_unknown_chunkp unknowns,
+ int num_unknowns));
+PNG_EXPORT(175, void, png_set_unknown_chunk_location,
+ (png_structp png_ptr, png_infop info_ptr, int chunk, int location));
+PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr,
+ png_const_infop info_ptr, png_unknown_chunkpp entries));
+#endif
+
+/* Png_free_data() will turn off the "valid" flag for anything it frees.
+ * If you need to turn it off for a chunk that your application has freed,
+ * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK);
+ */
+PNG_EXPORT(177, void, png_set_invalid,
+ (png_structp png_ptr, png_infop info_ptr, int mask));
+
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+/* The "params" pointer is currently not used and is for future expansion. */
+PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr,
+ int transforms, png_voidp params));
+PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr,
+ int transforms, png_voidp params));
+#endif
+
+PNG_EXPORT(180, png_const_charp, png_get_copyright,
+ (png_const_structp png_ptr));
+PNG_EXPORT(181, png_const_charp, png_get_header_ver,
+ (png_const_structp png_ptr));
+PNG_EXPORT(182, png_const_charp, png_get_header_version,
+ (png_const_structp png_ptr));
+PNG_EXPORT(183, png_const_charp, png_get_libpng_ver,
+ (png_const_structp png_ptr));
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr,
+ png_uint_32 mng_features_permitted));
+#endif
+
+/* For use in png_set_keep_unknown, added to version 1.2.6 */
+#define PNG_HANDLE_CHUNK_AS_DEFAULT 0
+#define PNG_HANDLE_CHUNK_NEVER 1
+#define PNG_HANDLE_CHUNK_IF_SAFE 2
+#define PNG_HANDLE_CHUNK_ALWAYS 3
+
+/* Strip the prepended error numbers ("#nnn ") from error and warning
+ * messages before passing them to the error or warning handler.
+ */
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+PNG_EXPORT(185, void, png_set_strip_error_numbers,
+ (png_structp png_ptr,
+ png_uint_32 strip_mode));
+#endif
+
+/* Added in libpng-1.2.6 */
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr,
+ png_uint_32 user_width_max, png_uint_32 user_height_max));
+PNG_EXPORT(187, png_uint_32, png_get_user_width_max,
+ (png_const_structp png_ptr));
+PNG_EXPORT(188, png_uint_32, png_get_user_height_max,
+ (png_const_structp png_ptr));
+/* Added in libpng-1.4.0 */
+PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr,
+ png_uint_32 user_chunk_cache_max));
+PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max,
+ (png_const_structp png_ptr));
+/* Added in libpng-1.4.1 */
+PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr,
+ png_alloc_size_t user_chunk_cache_max));
+PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max,
+ (png_const_structp png_ptr));
+#endif
+
+#if defined(PNG_INCH_CONVERSIONS_SUPPORTED)
+PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+
+PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+
+PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+
+PNG_FP_EXPORT(196, float, png_get_x_offset_inches,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
+PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed,
+ (png_structp png_ptr, png_const_infop info_ptr));
+#endif
+
+PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
+PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed,
+ (png_structp png_ptr, png_const_infop info_ptr));
+#endif
+
+# ifdef PNG_pHYs_SUPPORTED
+PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr,
+ png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y,
+ int *unit_type));
+# endif /* PNG_pHYs_SUPPORTED */
+#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */
+
+/* Added in libpng-1.4.0 */
+#ifdef PNG_IO_STATE_SUPPORTED
+PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr));
+
+PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name,
+ (png_structp png_ptr), PNG_DEPRECATED);
+PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
+ (png_const_structp png_ptr));
+
+/* The flags returned by png_get_io_state() are the following: */
+# define PNG_IO_NONE 0x0000 /* no I/O at this moment */
+# define PNG_IO_READING 0x0001 /* currently reading */
+# define PNG_IO_WRITING 0x0002 /* currently writing */
+# define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */
+# define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */
+# define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */
+# define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */
+# define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */
+# define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */
+#endif /* ?PNG_IO_STATE_SUPPORTED */
+
+/* Interlace support. The following macros are always defined so that if
+ * libpng interlace handling is turned off the macros may be used to handle
+ * interlaced images within the application.
+ */
+#define PNG_INTERLACE_ADAM7_PASSES 7
+
+/* Two macros to return the first row and first column of the original,
+ * full, image which appears in a given pass. 'pass' is in the range 0
+ * to 6 and the result is in the range 0 to 7.
+ */
+#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7)
+#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7)
+
+/* Two macros to help evaluate the number of rows or columns in each
+ * pass. This is expressed as a shift - effectively log2 of the number or
+ * rows or columns in each 8x8 tile of the original image.
+ */
+#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3)
+#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3)
+
+/* Hence two macros to determine the number of rows or columns in a given
+ * pass of an image given its height or width. In fact these macros may
+ * return non-zero even though the sub-image is empty, because the other
+ * dimension may be empty for a small image.
+ */
+#define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\
+ -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass))
+#define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\
+ -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass))
+
+/* For the reader row callbacks (both progressive and sequential) it is
+ * necessary to find the row in the output image given a row in an interlaced
+ * image, so two more macros:
+ */
+#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \
+ (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass))
+#define PNG_COL_FROM_PASS_COL(xIn, pass) \
+ (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass))
+
+/* Two macros which return a boolean (0 or 1) saying whether the given row
+ * or column is in a particular pass. These use a common utility macro that
+ * returns a mask for a given pass - the offset 'off' selects the row or
+ * column version. The mask has the appropriate bit set for each column in
+ * the tile.
+ */
+#define PNG_PASS_MASK(pass,off) ( \
+ ((0x110145AFU>>(((7-(off))-(pass))<<2)) & 0xFU) | \
+ ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U))
+
+#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \
+ ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1)
+#define PNG_COL_IN_INTERLACE_PASS(x, pass) \
+ ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1)
+
+#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
+/* With these routines we avoid an integer divide, which will be slower on
+ * most machines. However, it does take more operations than the corresponding
+ * divide method, so it may be slower on a few RISC systems. There are two
+ * shifts (by 8 or 16 bits) and an addition, versus a single integer divide.
+ *
+ * Note that the rounding factors are NOT supposed to be the same! 128 and
+ * 32768 are correct for the NODIV code; 127 and 32767 are correct for the
+ * standard method.
+ *
+ * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ]
+ */
+
+ /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
+
+# define png_composite(composite, fg, alpha, bg) \
+ { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \
+ * (png_uint_16)(alpha) \
+ + (png_uint_16)(bg)*(png_uint_16)(255 \
+ - (png_uint_16)(alpha)) + (png_uint_16)128); \
+ (composite) = (png_byte)((temp + (temp >> 8)) >> 8); }
+
+# define png_composite_16(composite, fg, alpha, bg) \
+ { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \
+ * (png_uint_32)(alpha) \
+ + (png_uint_32)(bg)*(png_uint_32)(65535L \
+ - (png_uint_32)(alpha)) + (png_uint_32)32768L); \
+ (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); }
+
+#else /* Standard method using integer division */
+
+# define png_composite(composite, fg, alpha, bg) \
+ (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
+ (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
+ (png_uint_16)127) / 255)
+
+# define png_composite_16(composite, fg, alpha, bg) \
+ (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \
+ (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
+ (png_uint_32)32767) / (png_uint_32)65535L)
+#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */
+
+#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
+PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf));
+PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf));
+PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf));
+#endif
+
+PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr,
+ png_const_bytep buf));
+/* No png_get_int_16 -- may be added if there's a real need for it. */
+
+/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */
+#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
+PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i));
+#endif
+#ifdef PNG_SAVE_INT_32_SUPPORTED
+PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i));
+#endif
+
+/* Place a 16-bit number into a buffer in PNG byte order.
+ * The parameter is declared unsigned int, not png_uint_16,
+ * just to avoid potential problems on pre-ANSI C compilers.
+ */
+#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
+PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
+/* No png_save_int_16 -- may be added if there's a real need for it. */
+#endif
+
+#ifdef PNG_USE_READ_MACROS
+/* Inline macros to do direct reads of bytes from the input buffer.
+ * The png_get_int_32() routine assumes we are using two's complement
+ * format for negative values, which is almost certainly true.
+ */
+# define png_get_uint_32(buf) \
+ (((png_uint_32)(*(buf)) << 24) + \
+ ((png_uint_32)(*((buf) + 1)) << 16) + \
+ ((png_uint_32)(*((buf) + 2)) << 8) + \
+ ((png_uint_32)(*((buf) + 3))))
+
+ /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
+ * function) incorrectly returned a value of type png_uint_32.
+ */
+# define png_get_uint_16(buf) \
+ ((png_uint_16) \
+ (((unsigned int)(*(buf)) << 8) + \
+ ((unsigned int)(*((buf) + 1)))))
+
+# define png_get_int_32(buf) \
+ ((png_int_32)((*(buf) & 0x80) \
+ ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \
+ : (png_int_32)png_get_uint_32(buf)))
+#endif
+
+/* Maintainer: Put new public prototypes here ^, in libpng.3, and project
+ * defs
+ */
+
+/* The last ordinal number (this is the *last* one already used; the next
+ * one to use is one more than this.) Maintainer, remember to add an entry to
+ * scripts/symbols.def as well.
+ */
+#ifdef PNG_EXPORT_LAST_ORDINAL
+ PNG_EXPORT_LAST_ORDINAL(221);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PNG_VERSION_INFO_ONLY */
+/* Do not put anything past this line */
+#endif /* PNG_H */
--- /dev/null
+
+/* pngconf.h - machine configurable file for libpng
+ *
+ * libpng version 1.5.2 - March 31, 2011
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ */
+
+/* Any machine specific code is near the front of this file, so if you
+ * are configuring libpng for a machine, you may want to read the section
+ * starting here down to where it starts to typedef png_color, png_text,
+ * and png_info.
+ */
+
+#ifndef PNGCONF_H
+#define PNGCONF_H
+
+#ifndef PNG_BUILDING_SYMBOL_TABLE
+/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C
+ * definition file for machine specific limits, this may impact the
+ * correctness of the definitons below (see uses of INT_MAX).
+ */
+# ifndef PNG_NO_LIMITS_H
+# include <limits.h>
+# endif
+
+/* For the memory copy APIs (i.e. the standard definitions of these),
+ * because this file defines png_memcpy and so on the base APIs must
+ * be defined here.
+ */
+# ifdef BSD
+# include <strings.h>
+# else
+# include <string.h>
+# endif
+
+/* For png_FILE_p - this provides the standard definition of a
+ * FILE
+ */
+# ifdef PNG_STDIO_SUPPORTED
+# include <stdio.h>
+# endif
+#endif
+
+/* This controls optimization of the reading of 16 and 32 bit values
+ * from PNG files. It can be set on a per-app-file basis - it
+ * just changes whether a macro is used to the function is called.
+ * The library builder sets the default, if read functions are not
+ * built into the library the macro implementation is forced on.
+ */
+#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
+# define PNG_USE_READ_MACROS
+#endif
+#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
+# if PNG_DEFAULT_READ_MACROS
+# define PNG_USE_READ_MACROS
+# endif
+#endif
+
+/* COMPILER SPECIFIC OPTIONS.
+ *
+ * These options are provided so that a variety of difficult compilers
+ * can be used. Some are fixed at build time (e.g. PNG_API_RULE
+ * below) but still have compiler specific implementations, others
+ * may be changed on a per-file basis when compiling against libpng.
+ */
+
+/* The PNGARG macro protects us against machines that don't have function
+ * prototypes (ie K&R style headers). If your compiler does not handle
+ * function prototypes, define this macro and use the included ansi2knr.
+ * I've always been able to use _NO_PROTO as the indicator, but you may
+ * need to drag the empty declaration out in front of here, or change the
+ * ifdef to suit your own needs.
+ */
+#ifndef PNGARG
+
+# ifdef OF /* zlib prototype munger */
+# define PNGARG(arglist) OF(arglist)
+# else
+
+# ifdef _NO_PROTO
+# define PNGARG(arglist) ()
+# else
+# define PNGARG(arglist) arglist
+# endif /* _NO_PROTO */
+
+# endif /* OF */
+
+#endif /* PNGARG */
+
+/* Function calling conventions.
+ * =============================
+ * Normally it is not necessary to specify to the compiler how to call
+ * a function - it just does it - however on x86 systems derived from
+ * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
+ * and some others) there are multiple ways to call a function and the
+ * default can be changed on the compiler command line. For this reason
+ * libpng specifies the calling convention of every exported function and
+ * every function called via a user supplied function pointer. This is
+ * done in this file by defining the following macros:
+ *
+ * PNGAPI Calling convention for exported functions.
+ * PNGCBAPI Calling convention for user provided (callback) functions.
+ * PNGCAPI Calling convention used by the ANSI-C library (required
+ * for longjmp callbacks and sometimes used internally to
+ * specify the calling convention for zlib).
+ *
+ * These macros should never be overridden. If it is necessary to
+ * change calling convention in a private build this can be done
+ * by setting PNG_API_RULE (which defaults to 0) to one of the values
+ * below to select the correct 'API' variants.
+ *
+ * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
+ * This is correct in every known environment.
+ * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
+ * the 'C' calling convention (from PNGCAPI) for
+ * callbacks (PNGCBAPI). This is no longer required
+ * in any known environment - if it has to be used
+ * please post an explanation of the problem to the
+ * libpng mailing list.
+ *
+ * These cases only differ if the operating system does not use the C
+ * calling convention, at present this just means the above cases
+ * (x86 DOS/Windows sytems) and, even then, this does not apply to
+ * Cygwin running on those systems.
+ *
+ * Note that the value must be defined in pnglibconf.h so that what
+ * the application uses to call the library matches the conventions
+ * set when building the library.
+ */
+
+/* Symbol export
+ * =============
+ * When building a shared library it is almost always necessary to tell
+ * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
+ * is used to mark the symbols. On some systems these symbols can be
+ * extracted at link time and need no special processing by the compiler,
+ * on other systems the symbols are flagged by the compiler and just
+ * the declaration requires a special tag applied (unfortunately) in a
+ * compiler dependent way. Some systems can do either.
+ *
+ * A small number of older systems also require a symbol from a DLL to
+ * be flagged to the program that calls it. This is a problem because
+ * we do not know in the header file included by application code that
+ * the symbol will come from a shared library, as opposed to a statically
+ * linked one. For this reason the application must tell us by setting
+ * the magic flag PNG_USE_DLL to turn on the special processing before
+ * it includes png.h.
+ *
+ * Four additional macros are used to make this happen:
+ *
+ * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
+ * the build or imported if PNG_USE_DLL is set - compiler
+ * and system specific.
+ *
+ * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
+ * 'type', compiler specific.
+ *
+ * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
+ * make a symbol exported from the DLL.
+ *
+ * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
+ * from a DLL - used to define PNG_IMPEXP when
+ * PNG_USE_DLL is set.
+ */
+
+/* System specific discovery.
+ * ==========================
+ * This code is used at build time to find PNG_IMPEXP, the API settings
+ * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
+ * import processing is possible. On Windows/x86 systems it also sets
+ * compiler-specific macros to the values required to change the calling
+ * conventions of the various functions.
+ */
+#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
+ defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
+ ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
+ defined(_M_X64) || defined(_M_IA64) )
+ /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes
+ * builds under Cygwin or MinGW. Also includes Watcom builds but these need
+ * special treatment because they are not compatible with GCC or Visual C
+ * because of different calling conventions.
+ */
+# if PNG_API_RULE == 2
+ /* If this line results in an error, either because __watcall is not
+ * understood or because of a redefine just below you cannot use *this*
+ * build of the library with the compiler you are using. *This* build was
+ * build using Watcom and applications must also be built using Watcom!
+ */
+# define PNGCAPI __watcall
+# endif
+
+# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
+# define PNGCAPI __cdecl
+# if PNG_API_RULE == 1
+# define PNGAPI __stdcall
+# endif
+# else
+ /* An older compiler, or one not detected (erroneously) above,
+ * if necessary override on the command line to get the correct
+ * variants for the compiler.
+ */
+# ifndef PNGCAPI
+# define PNGCAPI _cdecl
+# endif
+# if PNG_API_RULE == 1 && !defined(PNGAPI)
+# define PNGAPI _stdcall
+# endif
+# endif /* compiler/api */
+ /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
+
+# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
+ ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed
+# endif
+
+# if (defined(_MSC_VER) && _MSC_VER < 800) ||\
+ (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
+ /* older Borland and MSC
+ * compilers used '__export' and required this to be after
+ * the type.
+ */
+# ifndef PNG_EXPORT_TYPE
+# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
+# endif
+# define PNG_DLL_EXPORT __export
+# else /* newer compiler */
+# define PNG_DLL_EXPORT __declspec(dllexport)
+# ifndef PNG_DLL_IMPORT
+# define PNG_DLL_IMPORT __declspec(dllimport)
+# endif
+# endif /* compiler */
+
+#else /* !Windows/x86 */
+# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
+# define PNGAPI _System
+# else /* !Windows/x86 && !OS/2 */
+ /* Use the defaults, or define PNG*API on the command line (but
+ * this will have to be done for every compile!)
+ */
+# endif /* other system, !OS/2 */
+#endif /* !Windows/x86 */
+
+/* Now do all the defaulting . */
+#ifndef PNGCAPI
+# define PNGCAPI
+#endif
+#ifndef PNGCBAPI
+# define PNGCBAPI PNGCAPI
+#endif
+#ifndef PNGAPI
+# define PNGAPI PNGCAPI
+#endif
+
+/* The default for PNG_IMPEXP depends on whether the library is
+ * being built or used.
+ */
+#ifndef PNG_IMPEXP
+# ifdef PNGLIB_BUILD
+ /* Building the library */
+# if (defined(DLL_EXPORT)/*from libtool*/ ||\
+ defined(_WINDLL) || defined(_DLL) || defined(__DLL__) ||\
+ defined(_USRDLL) ||\
+ defined(PNG_BUILD_DLL)) && defined(PNG_DLL_EXPORT)
+ /* Building a DLL. */
+# define PNG_IMPEXP PNG_DLL_EXPORT
+# endif /* DLL */
+# else
+ /* Using the library */
+# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
+ /* This forces use of a DLL, disallowing static linking */
+# define PNG_IMPEXP PNG_DLL_IMPORT
+# endif
+# endif
+
+# ifndef PNG_IMPEXP
+# define PNG_IMPEXP
+# endif
+#endif
+
+/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
+ * 'attributes' as a storage class - the attributes go at the start of the
+ * function definition, and attributes are always appended regardless of the
+ * compiler. This considerably simplifies these macros but may cause problems
+ * if any compilers both need function attributes and fail to handle them as
+ * a storage class (this is unlikely.)
+ */
+#ifndef PNG_FUNCTION
+# define PNG_FUNCTION(type, name, args, attributes) attributes type name args
+#endif
+
+#ifndef PNG_EXPORT_TYPE
+# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
+#endif
+
+ /* The ordinal value is only relevant when preprocessing png.h for symbol
+ * table entries, so we discard it here. See the .dfn files in the
+ * scripts directory.
+ */
+#ifndef PNG_EXPORTA
+
+# define PNG_EXPORTA(ordinal, type, name, args, attributes)\
+ PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
+ extern attributes)
+#endif
+
+/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
+ * so make something non-empty to satisfy the requirement:
+ */
+#define PNG_EMPTY /*empty list*/
+
+#define PNG_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
+
+/* Use PNG_REMOVED to comment out a removed interface. */
+#ifndef PNG_REMOVED
+# define PNG_REMOVED(ordinal, type, name, args, attributes)
+#endif
+
+#ifndef PNG_CALLBACK
+# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
+#endif
+
+/* Support for compiler specific function attributes. These are used
+ * so that where compiler support is available incorrect use of API
+ * functions in png.h will generate compiler warnings.
+ *
+ * Added at libpng-1.2.41.
+ */
+
+#ifndef PNG_NO_PEDANTIC_WARNINGS
+# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
+# define PNG_PEDANTIC_WARNINGS_SUPPORTED
+# endif
+#endif
+
+#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
+ /* Support for compiler specific function attributes. These are used
+ * so that where compiler support is available incorrect use of API
+ * functions in png.h will generate compiler warnings. Added at libpng
+ * version 1.2.41.
+ */
+# if defined(__GNUC__)
+# ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
+# endif
+# ifndef PNG_NORETURN
+# define PNG_NORETURN __attribute__((__noreturn__))
+# endif
+# ifndef PNG_PTR_NORETURN
+ /* It's not enough to have the compiler be the correct compiler at
+ * this point - it's necessary for the library (which defines
+ * the type of the library longjmp) to also be the GNU library.
+ * This is because many systems use the GNU compiler with a
+ * non-GNU libc implementation. Min/GW headers are also compatible
+ * with GCC as well as uclibc, so it seems best to exclude known
+ * problem libcs here rather than just including known libcs.
+ *
+ * NOTE: this relies on the only use of PNG_PTR_NORETURN being with
+ * the system longjmp. If the same type is used elsewhere then this
+ * will need to be changed.
+ */
+# if !defined(__CYGWIN__)
+# define PNG_PTR_NORETURN __attribute__((__noreturn__))
+# endif
+# endif
+# ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED __attribute__((__malloc__))
+# endif
+
+ /* This specifically protects structure members that should only be
+ * accessed from within the library, therefore should be empty during
+ * a library build.
+ */
+# ifndef PNGLIB_BUILD
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __attribute__((__deprecated__))
+# endif
+# ifndef PNG_DEPSTRUCT
+# define PNG_DEPSTRUCT __attribute__((__deprecated__))
+# endif
+# ifndef PNG_PRIVATE
+# if 0 /* Doesn't work so we use deprecated instead*/
+# define PNG_PRIVATE \
+ __attribute__((warning("This function is not exported by libpng.")))
+# else
+# define PNG_PRIVATE \
+ __attribute__((__deprecated__))
+# endif
+# endif
+# endif /* PNGLIB_BUILD */
+# endif /* __GNUC__ */
+
+# if defined(_MSC_VER) && (_MSC_VER >= 1300)
+# ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT /* not supported */
+# endif
+# ifndef PNG_NORETURN
+# define PNG_NORETURN __declspec(noreturn)
+# endif
+# ifndef PNG_PTR_NORETURN
+# define PNG_PTR_NORETURN /* not supported */
+# endif
+# ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED __declspec(restrict)
+# endif
+
+ /* This specifically protects structure members that should only be
+ * accessed from within the library, therefore should be empty during
+ * a library build.
+ */
+# ifndef PNGLIB_BUILD
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __declspec(deprecated)
+# endif
+# ifndef PNG_DEPSTRUCT
+# define PNG_DEPSTRUCT __declspec(deprecated)
+# endif
+# ifndef PNG_PRIVATE
+# define PNG_PRIVATE __declspec(deprecated)
+# endif
+# endif /* PNGLIB_BUILD */
+# endif /* _MSC_VER */
+#endif /* PNG_PEDANTIC_WARNINGS */
+
+#ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED /* Use of this function is deprecated */
+#endif
+#ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT /* The result of this function must be checked */
+#endif
+#ifndef PNG_NORETURN
+# define PNG_NORETURN /* This function does not return */
+#endif
+#ifndef PNG_PTR_NORETURN
+# define PNG_PTR_NORETURN /* This function does not return */
+#endif
+#ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED /* The result of the function is new memory */
+#endif
+#ifndef PNG_DEPSTRUCT
+# define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
+#endif
+#ifndef PNG_PRIVATE
+# define PNG_PRIVATE /* This is a private libpng function */
+#endif
+#ifndef PNG_FP_EXPORT /* A floating point API. */
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+# define PNG_FP_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORT(ordinal, type, name, args)
+# else /* No floating point APIs */
+# define PNG_FP_EXPORT(ordinal, type, name, args)
+# endif
+#endif
+#ifndef PNG_FIXED_EXPORT /* A fixed point API. */
+# ifdef PNG_FIXED_POINT_SUPPORTED
+# define PNG_FIXED_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORT(ordinal, type, name, args)
+# else /* No fixed point APIs */
+# define PNG_FIXED_EXPORT(ordinal, type, name, args)
+# endif
+#endif
+
+/* The following uses const char * instead of char * for error
+ * and warning message functions, so some compilers won't complain.
+ * If you do not want to use const, define PNG_NO_CONST here.
+ *
+ * This should not change how the APIs are called, so it can be done
+ * on a per-file basis in the application.
+ */
+#ifndef PNG_CONST
+# ifndef PNG_NO_CONST
+# define PNG_CONST const
+# else
+# define PNG_CONST
+# endif
+#endif
+
+/* Some typedefs to get us started. These should be safe on most of the
+ * common platforms. The typedefs should be at least as large as the
+ * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
+ * don't have to be exactly that size. Some compilers dislike passing
+ * unsigned shorts as function parameters, so you may be better off using
+ * unsigned int for png_uint_16.
+ */
+
+#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)
+typedef unsigned int png_uint_32;
+typedef int png_int_32;
+#else
+typedef unsigned long png_uint_32;
+typedef long png_int_32;
+#endif
+typedef unsigned short png_uint_16;
+typedef short png_int_16;
+typedef unsigned char png_byte;
+
+#ifdef PNG_NO_SIZE_T
+typedef unsigned int png_size_t;
+#else
+typedef size_t png_size_t;
+#endif
+#define png_sizeof(x) (sizeof (x))
+
+/* The following is needed for medium model support. It cannot be in the
+ * pngpriv.h header. Needs modification for other compilers besides
+ * MSC. Model independent support declares all arrays and pointers to be
+ * large using the far keyword. The zlib version used must also support
+ * model independent data. As of version zlib 1.0.4, the necessary changes
+ * have been made in zlib. The USE_FAR_KEYWORD define triggers other
+ * changes that are needed. (Tim Wegner)
+ */
+
+/* Separate compiler dependencies (problem here is that zlib.h always
+ * defines FAR. (SJT)
+ */
+#ifdef __BORLANDC__
+# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
+# define LDATA 1
+# else
+# define LDATA 0
+# endif
+ /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
+# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
+# define PNG_MAX_MALLOC_64K /* only used in build */
+# if (LDATA != 1)
+# ifndef FAR
+# define FAR __far
+# endif
+# define USE_FAR_KEYWORD
+# endif /* LDATA != 1 */
+ /* Possibly useful for moving data out of default segment.
+ * Uncomment it if you want. Could also define FARDATA as
+ * const if your compiler supports it. (SJT)
+# define FARDATA FAR
+ */
+# endif /* __WIN32__, __FLAT__, __CYGWIN__ */
+#endif /* __BORLANDC__ */
+
+
+/* Suggest testing for specific compiler first before testing for
+ * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
+ * making reliance oncertain keywords suspect. (SJT)
+ */
+
+/* MSC Medium model */
+#ifdef FAR
+# ifdef M_I86MM
+# define USE_FAR_KEYWORD
+# define FARDATA FAR
+# include <dos.h>
+# endif
+#endif
+
+/* SJT: default case */
+#ifndef FAR
+# define FAR
+#endif
+
+/* At this point FAR is always defined */
+#ifndef FARDATA
+# define FARDATA
+#endif
+
+/* Typedef for floating-point numbers that are converted
+ * to fixed-point with a multiple of 100,000, e.g., gamma
+ */
+typedef png_int_32 png_fixed_point;
+
+/* Add typedefs for pointers */
+typedef void FAR * png_voidp;
+typedef PNG_CONST void FAR * png_const_voidp;
+typedef png_byte FAR * png_bytep;
+typedef PNG_CONST png_byte FAR * png_const_bytep;
+typedef png_uint_32 FAR * png_uint_32p;
+typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p;
+typedef png_int_32 FAR * png_int_32p;
+typedef PNG_CONST png_int_32 FAR * png_const_int_32p;
+typedef png_uint_16 FAR * png_uint_16p;
+typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p;
+typedef png_int_16 FAR * png_int_16p;
+typedef PNG_CONST png_int_16 FAR * png_const_int_16p;
+typedef char FAR * png_charp;
+typedef PNG_CONST char FAR * png_const_charp;
+typedef png_fixed_point FAR * png_fixed_point_p;
+typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p;
+typedef png_size_t FAR * png_size_tp;
+typedef PNG_CONST png_size_t FAR * png_const_size_tp;
+
+#ifdef PNG_STDIO_SUPPORTED
+typedef FILE * png_FILE_p;
+#endif
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+typedef double FAR * png_doublep;
+typedef PNG_CONST double FAR * png_const_doublep;
+#endif
+
+/* Pointers to pointers; i.e. arrays */
+typedef png_byte FAR * FAR * png_bytepp;
+typedef png_uint_32 FAR * FAR * png_uint_32pp;
+typedef png_int_32 FAR * FAR * png_int_32pp;
+typedef png_uint_16 FAR * FAR * png_uint_16pp;
+typedef png_int_16 FAR * FAR * png_int_16pp;
+typedef PNG_CONST char FAR * FAR * png_const_charpp;
+typedef char FAR * FAR * png_charpp;
+typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+typedef double FAR * FAR * png_doublepp;
+#endif
+
+/* Pointers to pointers to pointers; i.e., pointer to array */
+typedef char FAR * FAR * FAR * png_charppp;
+
+/* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
+ * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32
+ * to png_alloc_size_t are not necessary; in fact, it is recommended
+ * not to use them at all so that the compiler can complain when something
+ * turns out to be problematic.
+ * Casts in the other direction (from png_alloc_size_t to png_size_t or
+ * png_uint_32) should be explicitly applied; however, we do not expect
+ * to encounter practical situations that require such conversions.
+ */
+#if defined(__TURBOC__) && !defined(__FLAT__)
+ typedef unsigned long png_alloc_size_t;
+#else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
+ typedef unsigned long png_alloc_size_t;
+# else
+ /* This is an attempt to detect an old Windows system where (int) is
+ * actually 16 bits, in that case png_malloc must have an argument with a
+ * bigger size to accomodate the requirements of the library.
+ */
+# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \
+ (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)
+ typedef DWORD png_alloc_size_t;
+# else
+ typedef png_size_t png_alloc_size_t;
+# endif
+# endif
+#endif
+
+#endif /* PNGCONF_H */
--- /dev/null
+
+/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+/* Define PNG_DEBUG at compile time for debugging information. Higher
+ * numbers for PNG_DEBUG mean more debugging information. This has
+ * only been added since version 0.95 so it is not implemented throughout
+ * libpng yet, but more support will be added as needed.
+ *
+ * png_debug[1-2]?(level, message ,arg{0-2})
+ * Expands to a statement (either a simple expression or a compound
+ * do..while(0) statement) that outputs a message with parameter
+ * substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG
+ * is undefined, 0 or 1 every png_debug expands to a simple expression
+ * (actually ((void)0)).
+ *
+ * level: level of detail of message, starting at 0. A level 'n'
+ * message is preceded by 'n' tab characters (not implemented
+ * on Microsoft compilers unless PNG_DEBUG_FILE is also
+ * defined, to allow debug DLL compilation with no standard IO).
+ * message: a printf(3) style text string. A trailing '\n' is added
+ * to the message.
+ * arg: 0 to 2 arguments for printf(3) style substitution in message.
+ */
+#ifndef PNGDEBUG_H
+#define PNGDEBUG_H
+/* These settings control the formatting of messages in png.c and pngerror.c */
+/* Moved to pngdebug.h at 1.5.0 */
+# ifndef PNG_LITERAL_SHARP
+# define PNG_LITERAL_SHARP 0x23
+# endif
+# ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
+# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
+# endif
+# ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
+# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
+# endif
+# ifndef PNG_STRING_NEWLINE
+# define PNG_STRING_NEWLINE "\n"
+# endif
+
+#ifdef PNG_DEBUG
+# if (PNG_DEBUG > 0)
+# if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
+# include <crtdbg.h>
+# if (PNG_DEBUG > 1)
+# ifndef _DEBUG
+# define _DEBUG
+# endif
+# ifndef png_debug
+# define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
+# endif
+# ifndef png_debug1
+# define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
+# endif
+# ifndef png_debug2
+# define png_debug2(l,m,p1,p2) \
+ _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
+# endif
+# endif
+# else /* PNG_DEBUG_FILE || !_MSC_VER */
+# ifndef PNG_STDIO_SUPPORTED
+# include <stdio.h> /* not included yet */
+# endif
+# ifndef PNG_DEBUG_FILE
+# define PNG_DEBUG_FILE stderr
+# endif /* PNG_DEBUG_FILE */
+
+# if (PNG_DEBUG > 1)
+/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
+ * non-ISO compilers
+ */
+# ifdef __STDC__
+# ifndef png_debug
+# define png_debug(l,m) \
+ do { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
+ } while (0)
+# endif
+# ifndef png_debug1
+# define png_debug1(l,m,p1) \
+ do { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
+ } while (0)
+# endif
+# ifndef png_debug2
+# define png_debug2(l,m,p1,p2) \
+ do { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
+ } while (0)
+# endif
+# else /* __STDC __ */
+# ifndef png_debug
+# define png_debug(l,m) \
+ do { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format); \
+ } while (0)
+# endif
+# ifndef png_debug1
+# define png_debug1(l,m,p1) \
+ do { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format,p1); \
+ } while (0)
+# endif
+# ifndef png_debug2
+# define png_debug2(l,m,p1,p2) \
+ do { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format,p1,p2); \
+ } while (0)
+# endif
+# endif /* __STDC __ */
+# endif /* (PNG_DEBUG > 1) */
+
+# endif /* _MSC_VER */
+# endif /* (PNG_DEBUG > 0) */
+#endif /* PNG_DEBUG */
+#ifndef png_debug
+# define png_debug(l, m) ((void)0)
+#endif
+#ifndef png_debug1
+# define png_debug1(l, m, p1) ((void)0)
+#endif
+#ifndef png_debug2
+# define png_debug2(l, m, p1, p2) ((void)0)
+#endif
+#endif /* PNGDEBUG_H */
--- /dev/null
+
+/* pngerror.c - stub functions for i/o and memory allocation
+ *
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * This file provides a location for all error handling. Users who
+ * need special error handling are expected to write replacement functions
+ * and use png_set_error_fn() to use those functions. See the instructions
+ * at each function.
+ */
+
+#include "pngpriv.h"
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
+static PNG_FUNCTION(void, png_default_error,PNGARG((png_structp png_ptr,
+ png_const_charp error_message)),PNG_NORETURN);
+
+#ifdef PNG_WARNINGS_SUPPORTED
+static void /* PRIVATE */
+png_default_warning PNGARG((png_structp png_ptr,
+ png_const_charp warning_message));
+#endif /* PNG_WARNINGS_SUPPORTED */
+
+/* This function is called whenever there is a fatal error. This function
+ * should not be changed. If there is a need to handle errors differently,
+ * you should supply a replacement error function and use png_set_error_fn()
+ * to replace the error function at run-time.
+ */
+#ifdef PNG_ERROR_TEXT_SUPPORTED
+PNG_FUNCTION(void,PNGAPI
+png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN)
+{
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+ char msg[16];
+ if (png_ptr != NULL)
+ {
+ if (png_ptr->flags&
+ (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+ {
+ if (*error_message == PNG_LITERAL_SHARP)
+ {
+ /* Strip "#nnnn " from beginning of error message. */
+ int offset;
+ for (offset = 1; offset<15; offset++)
+ if (error_message[offset] == ' ')
+ break;
+
+ if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+ {
+ int i;
+ for (i = 0; i < offset - 1; i++)
+ msg[i] = error_message[i + 1];
+ msg[i - 1] = '\0';
+ error_message = msg;
+ }
+
+ else
+ error_message += offset;
+ }
+
+ else
+ {
+ if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+ {
+ msg[0] = '0';
+ msg[1] = '\0';
+ error_message = msg;
+ }
+ }
+ }
+ }
+#endif
+ if (png_ptr != NULL && png_ptr->error_fn != NULL)
+ (*(png_ptr->error_fn))(png_ptr, error_message);
+
+ /* If the custom handler doesn't exist, or if it returns,
+ use the default handler, which will not return. */
+ png_default_error(png_ptr, error_message);
+}
+#else
+PNG_FUNCTION(void,PNGAPI
+png_err,(png_structp png_ptr),PNG_NORETURN)
+{
+ if (png_ptr != NULL && png_ptr->error_fn != NULL)
+ (*(png_ptr->error_fn))(png_ptr, '\0');
+
+ /* If the custom handler doesn't exist, or if it returns,
+ use the default handler, which will not return. */
+ png_default_error(png_ptr, '\0');
+}
+#endif /* PNG_ERROR_TEXT_SUPPORTED */
+
+#ifdef PNG_WARNINGS_SUPPORTED
+/* This function is called whenever there is a non-fatal error. This function
+ * should not be changed. If there is a need to handle warnings differently,
+ * you should supply a replacement warning function and use
+ * png_set_error_fn() to replace the warning function at run-time.
+ */
+void PNGAPI
+png_warning(png_structp png_ptr, png_const_charp warning_message)
+{
+ int offset = 0;
+ if (png_ptr != NULL)
+ {
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+ if (png_ptr->flags&
+ (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+#endif
+ {
+ if (*warning_message == PNG_LITERAL_SHARP)
+ {
+ for (offset = 1; offset < 15; offset++)
+ if (warning_message[offset] == ' ')
+ break;
+ }
+ }
+ }
+ if (png_ptr != NULL && png_ptr->warning_fn != NULL)
+ (*(png_ptr->warning_fn))(png_ptr, warning_message + offset);
+ else
+ png_default_warning(png_ptr, warning_message + offset);
+}
+#endif /* PNG_WARNINGS_SUPPORTED */
+
+#ifdef PNG_BENIGN_ERRORS_SUPPORTED
+void PNGAPI
+png_benign_error(png_structp png_ptr, png_const_charp error_message)
+{
+ if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
+ png_warning(png_ptr, error_message);
+ else
+ png_error(png_ptr, error_message);
+}
+#endif
+
+/* These utilities are used internally to build an error message that relates
+ * to the current chunk. The chunk name comes from png_ptr->chunk_name,
+ * this is used to prefix the message. The message is limited in length
+ * to 63 bytes, the name characters are output as hex digits wrapped in []
+ * if the character is invalid.
+ */
+#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
+static PNG_CONST char png_digit[16] = {
+ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+ 'A', 'B', 'C', 'D', 'E', 'F'
+};
+
+#define PNG_MAX_ERROR_TEXT 64
+#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
+static void /* PRIVATE */
+png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
+ error_message)
+{
+ int iout = 0, iin = 0;
+
+ while (iin < 4)
+ {
+ int c = png_ptr->chunk_name[iin++];
+ if (isnonalpha(c))
+ {
+ buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET;
+ buffer[iout++] = png_digit[(c & 0xf0) >> 4];
+ buffer[iout++] = png_digit[c & 0x0f];
+ buffer[iout++] = PNG_LITERAL_RIGHT_SQUARE_BRACKET;
+ }
+
+ else
+ {
+ buffer[iout++] = (png_byte)c;
+ }
+ }
+
+ if (error_message == NULL)
+ buffer[iout] = '\0';
+
+ else
+ {
+ buffer[iout++] = ':';
+ buffer[iout++] = ' ';
+ png_memcpy(buffer + iout, error_message, PNG_MAX_ERROR_TEXT);
+ buffer[iout + PNG_MAX_ERROR_TEXT - 1] = '\0';
+ }
+}
+#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */
+
+#if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
+PNG_FUNCTION(void,PNGAPI
+png_chunk_error,(png_structp png_ptr, png_const_charp error_message),
+ PNG_NORETURN)
+{
+ char msg[18+PNG_MAX_ERROR_TEXT];
+ if (png_ptr == NULL)
+ png_error(png_ptr, error_message);
+
+ else
+ {
+ png_format_buffer(png_ptr, msg, error_message);
+ png_error(png_ptr, msg);
+ }
+}
+#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */
+
+#ifdef PNG_WARNINGS_SUPPORTED
+void PNGAPI
+png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
+{
+ char msg[18+PNG_MAX_ERROR_TEXT];
+ if (png_ptr == NULL)
+ png_warning(png_ptr, warning_message);
+
+ else
+ {
+ png_format_buffer(png_ptr, msg, warning_message);
+ png_warning(png_ptr, msg);
+ }
+}
+#endif /* PNG_WARNINGS_SUPPORTED */
+
+#ifdef PNG_READ_SUPPORTED
+#ifdef PNG_BENIGN_ERRORS_SUPPORTED
+void PNGAPI
+png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message)
+{
+ if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
+ png_chunk_warning(png_ptr, error_message);
+
+ else
+ png_chunk_error(png_ptr, error_message);
+}
+#endif
+#endif /* PNG_READ_SUPPORTED */
+
+#ifdef PNG_ERROR_TEXT_SUPPORTED
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+PNG_FUNCTION(void,
+png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN)
+{
+# define fixed_message "fixed point overflow in "
+# define fixed_message_ln ((sizeof fixed_message)-1)
+ int iin;
+ char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT];
+ png_memcpy(msg, fixed_message, fixed_message_ln);
+ iin = 0;
+ if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0)
+ {
+ msg[fixed_message_ln + iin] = name[iin];
+ ++iin;
+ }
+ msg[fixed_message_ln + iin] = 0;
+ png_error(png_ptr, msg);
+}
+#endif
+#endif
+
+#ifdef PNG_SETJMP_SUPPORTED
+/* This API only exists if ANSI-C style error handling is used,
+ * otherwise it is necessary for png_default_error to be overridden.
+ */
+jmp_buf* PNGAPI
+png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn,
+ size_t jmp_buf_size)
+{
+ if (png_ptr == NULL || jmp_buf_size != png_sizeof(jmp_buf))
+ return NULL;
+
+ png_ptr->longjmp_fn = longjmp_fn;
+ return &png_ptr->png_jmpbuf;
+}
+#endif
+
+/* This is the default error handling function. Note that replacements for
+ * this function MUST NOT RETURN, or the program will likely crash. This
+ * function is used by default, or if the program supplies NULL for the
+ * error function pointer in png_set_error_fn().
+ */
+static PNG_FUNCTION(void /* PRIVATE */,
+png_default_error,(png_structp png_ptr, png_const_charp error_message),
+ PNG_NORETURN)
+{
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+ if (*error_message == PNG_LITERAL_SHARP)
+ {
+ /* Strip "#nnnn " from beginning of error message. */
+ int offset;
+ char error_number[16];
+ for (offset = 0; offset<15; offset++)
+ {
+ error_number[offset] = error_message[offset + 1];
+ if (error_message[offset] == ' ')
+ break;
+ }
+
+ if ((offset > 1) && (offset < 15))
+ {
+ error_number[offset - 1] = '\0';
+ fprintf(stderr, "libpng error no. %s: %s",
+ error_number, error_message + offset + 1);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
+
+ else
+ {
+ fprintf(stderr, "libpng error: %s, offset=%d",
+ error_message, offset);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
+ }
+ else
+#endif
+ {
+ fprintf(stderr, "libpng error: %s", error_message);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
+#endif
+#ifndef PNG_CONSOLE_IO_SUPPORTED
+ PNG_UNUSED(error_message) /* Make compiler happy */
+#endif
+ png_longjmp(png_ptr, 1);
+}
+
+PNG_FUNCTION(void,PNGAPI
+png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN)
+{
+#ifdef PNG_SETJMP_SUPPORTED
+ if (png_ptr && png_ptr->longjmp_fn)
+ {
+# ifdef USE_FAR_KEYWORD
+ {
+ jmp_buf png_jmpbuf;
+ png_memcpy(png_jmpbuf, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
+ png_ptr->longjmp_fn(png_jmpbuf, val);
+ }
+
+# else
+ png_ptr->longjmp_fn(png_ptr->png_jmpbuf, val);
+# endif
+ }
+#endif
+ /* Here if not setjmp support or if png_ptr is null. */
+ PNG_ABORT();
+}
+
+#ifdef PNG_WARNINGS_SUPPORTED
+/* This function is called when there is a warning, but the library thinks
+ * it can continue anyway. Replacement functions don't have to do anything
+ * here if you don't want them to. In the default configuration, png_ptr is
+ * not used, but it is passed in case it may be useful.
+ */
+static void /* PRIVATE */
+png_default_warning(png_structp png_ptr, png_const_charp warning_message)
+{
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+# ifdef PNG_ERROR_NUMBERS_SUPPORTED
+ if (*warning_message == PNG_LITERAL_SHARP)
+ {
+ int offset;
+ char warning_number[16];
+ for (offset = 0; offset < 15; offset++)
+ {
+ warning_number[offset] = warning_message[offset + 1];
+ if (warning_message[offset] == ' ')
+ break;
+ }
+
+ if ((offset > 1) && (offset < 15))
+ {
+ warning_number[offset + 1] = '\0';
+ fprintf(stderr, "libpng warning no. %s: %s",
+ warning_number, warning_message + offset);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
+
+ else
+ {
+ fprintf(stderr, "libpng warning: %s",
+ warning_message);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
+ }
+ else
+# endif
+
+ {
+ fprintf(stderr, "libpng warning: %s", warning_message);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
+#else
+ PNG_UNUSED(warning_message) /* Make compiler happy */
+#endif
+ PNG_UNUSED(png_ptr) /* Make compiler happy */
+}
+#endif /* PNG_WARNINGS_SUPPORTED */
+
+/* This function is called when the application wants to use another method
+ * of handling errors and warnings. Note that the error function MUST NOT
+ * return to the calling routine or serious problems will occur. The return
+ * method used in the default routine calls longjmp(png_ptr->png_jmpbuf, 1)
+ */
+void PNGAPI
+png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warning_fn)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->error_ptr = error_ptr;
+ png_ptr->error_fn = error_fn;
+ png_ptr->warning_fn = warning_fn;
+}
+
+
+/* This function returns a pointer to the error_ptr associated with the user
+ * functions. The application should free any memory associated with this
+ * pointer before png_write_destroy and png_read_destroy are called.
+ */
+png_voidp PNGAPI
+png_get_error_ptr(png_const_structp png_ptr)
+{
+ if (png_ptr == NULL)
+ return NULL;
+
+ return ((png_voidp)png_ptr->error_ptr);
+}
+
+
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+void PNGAPI
+png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
+{
+ if (png_ptr != NULL)
+ {
+ png_ptr->flags &=
+ ((~(PNG_FLAG_STRIP_ERROR_NUMBERS |
+ PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
+ }
+}
+#endif
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
--- /dev/null
+
+/* pngget.c - retrieval of values from info struct
+ *
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ */
+
+#include "pngpriv.h"
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
+png_uint_32 PNGAPI
+png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 flag)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return(info_ptr->valid & flag);
+
+ return(0);
+}
+
+png_size_t PNGAPI
+png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return(info_ptr->rowbytes);
+
+ return(0);
+}
+
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+png_bytepp PNGAPI
+png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return(info_ptr->row_pointers);
+
+ return(0);
+}
+#endif
+
+#ifdef PNG_EASY_ACCESS_SUPPORTED
+/* Easy access to info, added in libpng-0.99 */
+png_uint_32 PNGAPI
+png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return info_ptr->width;
+
+ return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return info_ptr->height;
+
+ return (0);
+}
+
+png_byte PNGAPI
+png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return info_ptr->bit_depth;
+
+ return (0);
+}
+
+png_byte PNGAPI
+png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return info_ptr->color_type;
+
+ return (0);
+}
+
+png_byte PNGAPI
+png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return info_ptr->filter_type;
+
+ return (0);
+}
+
+png_byte PNGAPI
+png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return info_ptr->interlace_type;
+
+ return (0);
+}
+
+png_byte PNGAPI
+png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return info_ptr->compression_type;
+
+ return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_pHYs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ {
+ png_debug1(1, "in %s retrieval function",
+ "png_get_x_pixels_per_meter");
+
+ if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
+ return (info_ptr->x_pixels_per_unit);
+ }
+#endif
+
+ return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_pHYs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ {
+ png_debug1(1, "in %s retrieval function",
+ "png_get_y_pixels_per_meter");
+
+ if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
+ return (info_ptr->y_pixels_per_unit);
+ }
+#endif
+
+ return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_pHYs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ {
+ png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
+
+ if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER &&
+ info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
+ return (info_ptr->x_pixels_per_unit);
+ }
+#endif
+
+ return (0);
+}
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+float PNGAPI
+png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_READ_pHYs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ {
+ png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
+
+ if (info_ptr->x_pixels_per_unit != 0)
+ return ((float)((float)info_ptr->y_pixels_per_unit
+ /(float)info_ptr->x_pixels_per_unit));
+ }
+#endif
+
+ return ((float)0.0);
+}
+#endif
+
+#ifdef PNG_FIXED_POINT_SUPPORTED
+png_fixed_point PNGAPI
+png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr,
+ png_const_infop info_ptr)
+{
+#ifdef PNG_READ_pHYs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)
+ && info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0
+ && info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX
+ && info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX)
+ {
+ png_fixed_point res;
+
+ png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio_fixed");
+
+ /* The following casts work because a PNG 4 byte integer only has a valid
+ * range of 0..2^31-1; otherwise the cast might overflow.
+ */
+ if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1,
+ (png_int_32)info_ptr->x_pixels_per_unit))
+ return res;
+ }
+#endif
+
+ return 0;
+}
+#endif
+
+png_int_32 PNGAPI
+png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_oFFs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ {
+ png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
+
+ if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
+ return (info_ptr->x_offset);
+ }
+#endif
+
+ return (0);
+}
+
+png_int_32 PNGAPI
+png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_oFFs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ {
+ png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
+
+ if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
+ return (info_ptr->y_offset);
+ }
+#endif
+
+ return (0);
+}
+
+png_int_32 PNGAPI
+png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_oFFs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ {
+ png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels");
+
+ if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
+ return (info_ptr->x_offset);
+ }
+#endif
+
+ return (0);
+}
+
+png_int_32 PNGAPI
+png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_oFFs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ {
+ png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels");
+
+ if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
+ return (info_ptr->y_offset);
+ }
+#endif
+
+ return (0);
+}
+
+#ifdef PNG_INCH_CONVERSIONS_SUPPORTED
+static png_uint_32
+ppi_from_ppm(png_uint_32 ppm)
+{
+#if 0
+ /* The conversion is *(2.54/100), in binary (32 digits):
+ * .00000110100000001001110101001001
+ */
+ png_uint_32 t1001, t1101;
+ ppm >>= 1; /* .1 */
+ t1001 = ppm + (ppm >> 3); /* .1001 */
+ t1101 = t1001 + (ppm >> 1); /* .1101 */
+ ppm >>= 20; /* .000000000000000000001 */
+ t1101 += t1101 >> 15; /* .1101000000000001101 */
+ t1001 >>= 11; /* .000000000001001 */
+ t1001 += t1001 >> 12; /* .000000000001001000000001001 */
+ ppm += t1001; /* .000000000001001000001001001 */
+ ppm += t1101; /* .110100000001001110101001001 */
+ return (ppm + 16) >> 5;/* .00000110100000001001110101001001 */
+#else
+ /* The argument is a PNG unsigned integer, so it is not permitted
+ * to be bigger than 2^31.
+ */
+ png_fixed_point result;
+ if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127,
+ 5000))
+ return result;
+
+ /* Overflow. */
+ return 0;
+#endif
+}
+
+png_uint_32 PNGAPI
+png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr));
+}
+
+png_uint_32 PNGAPI
+png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr));
+}
+
+png_uint_32 PNGAPI
+png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr));
+}
+
+#ifdef PNG_FIXED_POINT_SUPPORTED
+static png_fixed_point
+png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns)
+{
+ /* Convert from metres * 1,000,000 to inches * 100,000, meters to
+ * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127.
+ * Notice that this can overflow - a warning is output and 0 is
+ * returned.
+ */
+ return png_muldiv_warn(png_ptr, microns, 500, 127);
+}
+
+png_fixed_point PNGAPI
+png_get_x_offset_inches_fixed(png_structp png_ptr,
+ png_const_infop info_ptr)
+{
+ return png_fixed_inches_from_microns(png_ptr,
+ png_get_x_offset_microns(png_ptr, info_ptr));
+}
+#endif
+
+#ifdef PNG_FIXED_POINT_SUPPORTED
+png_fixed_point PNGAPI
+png_get_y_offset_inches_fixed(png_structp png_ptr,
+ png_const_infop info_ptr)
+{
+ return png_fixed_inches_from_microns(png_ptr,
+ png_get_y_offset_microns(png_ptr, info_ptr));
+}
+#endif
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+float PNGAPI
+png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ /* To avoid the overflow do the conversion directly in floating
+ * point.
+ */
+ return (float)(png_get_x_offset_microns(png_ptr, info_ptr) * .00003937);
+}
+#endif
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+float PNGAPI
+png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ /* To avoid the overflow do the conversion directly in floating
+ * point.
+ */
+ return (float)(png_get_y_offset_microns(png_ptr, info_ptr) * .00003937);
+}
+#endif
+
+#ifdef PNG_pHYs_SUPPORTED
+png_uint_32 PNGAPI
+png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
+{
+ png_uint_32 retval = 0;
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ {
+ png_debug1(1, "in %s retrieval function", "pHYs");
+
+ if (res_x != NULL)
+ {
+ *res_x = info_ptr->x_pixels_per_unit;
+ retval |= PNG_INFO_pHYs;
+ }
+
+ if (res_y != NULL)
+ {
+ *res_y = info_ptr->y_pixels_per_unit;
+ retval |= PNG_INFO_pHYs;
+ }
+
+ if (unit_type != NULL)
+ {
+ *unit_type = (int)info_ptr->phys_unit_type;
+ retval |= PNG_INFO_pHYs;
+
+ if (*unit_type == 1)
+ {
+ if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
+ if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
+ }
+ }
+ }
+
+ return (retval);
+}
+#endif /* PNG_pHYs_SUPPORTED */
+#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */
+
+/* png_get_channels really belongs in here, too, but it's been around longer */
+
+#endif /* PNG_EASY_ACCESS_SUPPORTED */
+
+png_byte PNGAPI
+png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return(info_ptr->channels);
+
+ return (0);
+}
+
+png_const_bytep PNGAPI
+png_get_signature(png_const_structp png_ptr, png_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return(info_ptr->signature);
+
+ return (NULL);
+}
+
+#ifdef PNG_bKGD_SUPPORTED
+png_uint_32 PNGAPI
+png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr,
+ png_color_16p *background)
+{
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
+ && background != NULL)
+ {
+ png_debug1(1, "in %s retrieval function", "bKGD");
+
+ *background = &(info_ptr->background);
+ return (PNG_INFO_bKGD);
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_cHRM_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr,
+ double *white_x, double *white_y, double *red_x, double *red_y,
+ double *green_x, double *green_y, double *blue_x, double *blue_y)
+{
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
+ {
+ png_debug1(1, "in %s retrieval function", "cHRM");
+
+ if (white_x != NULL)
+ *white_x = png_float(png_ptr, info_ptr->x_white, "cHRM white X");
+ if (white_y != NULL)
+ *white_y = png_float(png_ptr, info_ptr->y_white, "cHRM white Y");
+ if (red_x != NULL)
+ *red_x = png_float(png_ptr, info_ptr->x_red, "cHRM red X");
+ if (red_y != NULL)
+ *red_y = png_float(png_ptr, info_ptr->y_red, "cHRM red Y");
+ if (green_x != NULL)
+ *green_x = png_float(png_ptr, info_ptr->x_green, "cHRM green X");
+ if (green_y != NULL)
+ *green_y = png_float(png_ptr, info_ptr->y_green, "cHRM green Y");
+ if (blue_x != NULL)
+ *blue_x = png_float(png_ptr, info_ptr->x_blue, "cHRM blue X");
+ if (blue_y != NULL)
+ *blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y");
+ return (PNG_INFO_cHRM);
+ }
+
+ return (0);
+}
+# endif
+
+# ifdef PNG_FIXED_POINT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
+ png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
+ png_fixed_point *blue_x, png_fixed_point *blue_y)
+{
+ png_debug1(1, "in %s retrieval function", "cHRM");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
+ {
+ if (white_x != NULL)
+ *white_x = info_ptr->x_white;
+ if (white_y != NULL)
+ *white_y = info_ptr->y_white;
+ if (red_x != NULL)
+ *red_x = info_ptr->x_red;
+ if (red_y != NULL)
+ *red_y = info_ptr->y_red;
+ if (green_x != NULL)
+ *green_x = info_ptr->x_green;
+ if (green_y != NULL)
+ *green_y = info_ptr->y_green;
+ if (blue_x != NULL)
+ *blue_x = info_ptr->x_blue;
+ if (blue_y != NULL)
+ *blue_y = info_ptr->y_blue;
+ return (PNG_INFO_cHRM);
+ }
+
+ return (0);
+}
+# endif
+#endif
+
+#ifdef PNG_gAMA_SUPPORTED
+png_uint_32 PNGFAPI
+png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *file_gamma)
+{
+ png_debug1(1, "in %s retrieval function", "gAMA");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
+ && file_gamma != NULL)
+ {
+ *file_gamma = info_ptr->gamma;
+ return (PNG_INFO_gAMA);
+ }
+
+ return (0);
+}
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr,
+ double *file_gamma)
+{
+ png_fixed_point igamma;
+ png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma);
+
+ if (ok)
+ *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA");
+
+ return ok;
+}
+
+# endif
+#endif
+
+#ifdef PNG_sRGB_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr,
+ int *file_srgb_intent)
+{
+ png_debug1(1, "in %s retrieval function", "sRGB");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
+ && file_srgb_intent != NULL)
+ {
+ *file_srgb_intent = (int)info_ptr->srgb_intent;
+ return (PNG_INFO_sRGB);
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_iCCP_SUPPORTED
+png_uint_32 PNGAPI
+png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_charpp name, int *compression_type,
+ png_bytepp profile, png_uint_32 *proflen)
+{
+ png_debug1(1, "in %s retrieval function", "iCCP");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
+ && name != NULL && profile != NULL && proflen != NULL)
+ {
+ *name = info_ptr->iccp_name;
+ *profile = info_ptr->iccp_profile;
+ /* Compression_type is a dummy so the API won't have to change
+ * if we introduce multiple compression types later.
+ */
+ *proflen = (int)info_ptr->iccp_proflen;
+ *compression_type = (int)info_ptr->iccp_compression;
+ return (PNG_INFO_iCCP);
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_sPLT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_sPLT_tpp spalettes)
+{
+ if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
+ {
+ *spalettes = info_ptr->splt_palettes;
+ return ((png_uint_32)info_ptr->splt_palettes_num);
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
+png_uint_32 PNGAPI
+png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_16p *hist)
+{
+ png_debug1(1, "in %s retrieval function", "hIST");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
+ && hist != NULL)
+ {
+ *hist = info_ptr->hist;
+ return (PNG_INFO_hIST);
+ }
+
+ return (0);
+}
+#endif
+
+png_uint_32 PNGAPI
+png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 *width, png_uint_32 *height, int *bit_depth,
+ int *color_type, int *interlace_type, int *compression_type,
+ int *filter_type)
+
+{
+ png_debug1(1, "in %s retrieval function", "IHDR");
+
+ if (png_ptr == NULL || info_ptr == NULL || width == NULL ||
+ height == NULL || bit_depth == NULL || color_type == NULL)
+ return (0);
+
+ *width = info_ptr->width;
+ *height = info_ptr->height;
+ *bit_depth = info_ptr->bit_depth;
+ *color_type = info_ptr->color_type;
+
+ if (compression_type != NULL)
+ *compression_type = info_ptr->compression_type;
+
+ if (filter_type != NULL)
+ *filter_type = info_ptr->filter_type;
+
+ if (interlace_type != NULL)
+ *interlace_type = info_ptr->interlace_type;
+
+ /* This is redundant if we can be sure that the info_ptr values were all
+ * assigned in png_set_IHDR(). We do the check anyhow in case an
+ * application has ignored our advice not to mess with the members
+ * of info_ptr directly.
+ */
+ png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
+ info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
+ info_ptr->compression_type, info_ptr->filter_type);
+
+ return (1);
+}
+
+#ifdef PNG_oFFs_SUPPORTED
+png_uint_32 PNGAPI
+png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
+{
+ png_debug1(1, "in %s retrieval function", "oFFs");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
+ && offset_x != NULL && offset_y != NULL && unit_type != NULL)
+ {
+ *offset_x = info_ptr->x_offset;
+ *offset_y = info_ptr->y_offset;
+ *unit_type = (int)info_ptr->offset_unit_type;
+ return (PNG_INFO_oFFs);
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_pCAL_SUPPORTED
+png_uint_32 PNGAPI
+png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
+ png_charp *units, png_charpp *params)
+{
+ png_debug1(1, "in %s retrieval function", "pCAL");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
+ && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
+ nparams != NULL && units != NULL && params != NULL)
+ {
+ *purpose = info_ptr->pcal_purpose;
+ *X0 = info_ptr->pcal_X0;
+ *X1 = info_ptr->pcal_X1;
+ *type = (int)info_ptr->pcal_type;
+ *nparams = (int)info_ptr->pcal_nparams;
+ *units = info_ptr->pcal_units;
+ *params = info_ptr->pcal_params;
+ return (PNG_INFO_pCAL);
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_sCAL_SUPPORTED
+# ifdef PNG_FIXED_POINT_SUPPORTED
+# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr,
+ int *unit, png_fixed_point *width, png_fixed_point *height)
+{
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ *unit = info_ptr->scal_unit;
+ /*TODO: make this work without FP support */
+ *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width");
+ *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height),
+ "sCAL height");
+ return (PNG_INFO_sCAL);
+ }
+
+ return(0);
+}
+# endif /* FLOATING_ARITHMETIC */
+# endif /* FIXED_POINT */
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr,
+ int *unit, double *width, double *height)
+{
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ *unit = info_ptr->scal_unit;
+ *width = atof(info_ptr->scal_s_width);
+ *height = atof(info_ptr->scal_s_height);
+ return (PNG_INFO_sCAL);
+ }
+
+ return(0);
+}
+# endif /* FLOATING POINT */
+png_uint_32 PNGAPI
+png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr,
+ int *unit, png_charpp width, png_charpp height)
+{
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ *unit = info_ptr->scal_unit;
+ *width = info_ptr->scal_s_width;
+ *height = info_ptr->scal_s_height;
+ return (PNG_INFO_sCAL);
+ }
+
+ return(0);
+}
+#endif /* sCAL */
+
+#ifdef PNG_pHYs_SUPPORTED
+png_uint_32 PNGAPI
+png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
+{
+ png_uint_32 retval = 0;
+
+ png_debug1(1, "in %s retrieval function", "pHYs");
+
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_pHYs))
+ {
+ if (res_x != NULL)
+ {
+ *res_x = info_ptr->x_pixels_per_unit;
+ retval |= PNG_INFO_pHYs;
+ }
+
+ if (res_y != NULL)
+ {
+ *res_y = info_ptr->y_pixels_per_unit;
+ retval |= PNG_INFO_pHYs;
+ }
+
+ if (unit_type != NULL)
+ {
+ *unit_type = (int)info_ptr->phys_unit_type;
+ retval |= PNG_INFO_pHYs;
+ }
+ }
+
+ return (retval);
+}
+#endif /* pHYs */
+
+png_uint_32 PNGAPI
+png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_colorp *palette, int *num_palette)
+{
+ png_debug1(1, "in %s retrieval function", "PLTE");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
+ && palette != NULL)
+ {
+ *palette = info_ptr->palette;
+ *num_palette = info_ptr->num_palette;
+ png_debug1(3, "num_palette = %d", *num_palette);
+ return (PNG_INFO_PLTE);
+ }
+
+ return (0);
+}
+
+#ifdef PNG_sBIT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr,
+ png_color_8p *sig_bit)
+{
+ png_debug1(1, "in %s retrieval function", "sBIT");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
+ && sig_bit != NULL)
+ {
+ *sig_bit = &(info_ptr->sig_bit);
+ return (PNG_INFO_sBIT);
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_TEXT_SUPPORTED
+png_uint_32 PNGAPI
+png_get_text(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_textp *text_ptr, int *num_text)
+{
+ if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
+ {
+ png_debug1(1, "in %s retrieval function",
+ (png_ptr->chunk_name[0] == '\0' ? "text" :
+ (png_const_charp)png_ptr->chunk_name));
+
+ if (text_ptr != NULL)
+ *text_ptr = info_ptr->text;
+
+ if (num_text != NULL)
+ *num_text = info_ptr->num_text;
+
+ return ((png_uint_32)info_ptr->num_text);
+ }
+
+ if (num_text != NULL)
+ *num_text = 0;
+
+ return(0);
+}
+#endif
+
+#ifdef PNG_tIME_SUPPORTED
+png_uint_32 PNGAPI
+png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
+{
+ png_debug1(1, "in %s retrieval function", "tIME");
+
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
+ && mod_time != NULL)
+ {
+ *mod_time = &(info_ptr->mod_time);
+ return (PNG_INFO_tIME);
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_tRNS_SUPPORTED
+png_uint_32 PNGAPI
+png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr,
+ png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
+{
+ png_uint_32 retval = 0;
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
+ {
+ png_debug1(1, "in %s retrieval function", "tRNS");
+
+ if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (trans_alpha != NULL)
+ {
+ *trans_alpha = info_ptr->trans_alpha;
+ retval |= PNG_INFO_tRNS;
+ }
+
+ if (trans_color != NULL)
+ *trans_color = &(info_ptr->trans_color);
+ }
+
+ else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
+ {
+ if (trans_color != NULL)
+ {
+ *trans_color = &(info_ptr->trans_color);
+ retval |= PNG_INFO_tRNS;
+ }
+
+ if (trans_alpha != NULL)
+ *trans_alpha = NULL;
+ }
+
+ if (num_trans != NULL)
+ {
+ *num_trans = info_ptr->num_trans;
+ retval |= PNG_INFO_tRNS;
+ }
+ }
+
+ return (retval);
+}
+#endif
+
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+int PNGAPI
+png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_unknown_chunkpp unknowns)
+{
+ if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
+ {
+ *unknowns = info_ptr->unknown_chunks;
+ return info_ptr->unknown_chunks_num;
+ }
+
+ return (0);
+}
+#endif
+
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+png_byte PNGAPI
+png_get_rgb_to_gray_status (png_const_structp png_ptr)
+{
+ return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0);
+}
+#endif
+
+#ifdef PNG_USER_CHUNKS_SUPPORTED
+png_voidp PNGAPI
+png_get_user_chunk_ptr(png_const_structp png_ptr)
+{
+ return (png_ptr ? png_ptr->user_chunk_ptr : NULL);
+}
+#endif
+
+png_size_t PNGAPI
+png_get_compression_buffer_size(png_const_structp png_ptr)
+{
+ return (png_ptr ? png_ptr->zbuf_size : 0L);
+}
+
+
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+/* These functions were added to libpng 1.2.6 and were enabled
+ * by default in libpng-1.4.0 */
+png_uint_32 PNGAPI
+png_get_user_width_max (png_const_structp png_ptr)
+{
+ return (png_ptr ? png_ptr->user_width_max : 0);
+}
+
+png_uint_32 PNGAPI
+png_get_user_height_max (png_const_structp png_ptr)
+{
+ return (png_ptr ? png_ptr->user_height_max : 0);
+}
+
+/* This function was added to libpng 1.4.0 */
+png_uint_32 PNGAPI
+png_get_chunk_cache_max (png_const_structp png_ptr)
+{
+ return (png_ptr ? png_ptr->user_chunk_cache_max : 0);
+}
+
+/* This function was added to libpng 1.4.1 */
+png_alloc_size_t PNGAPI
+png_get_chunk_malloc_max (png_const_structp png_ptr)
+{
+ return (png_ptr ? png_ptr->user_chunk_malloc_max : 0);
+}
+#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
+
+/* These functions were added to libpng 1.4.0 */
+#ifdef PNG_IO_STATE_SUPPORTED
+png_uint_32 PNGAPI
+png_get_io_state (png_structp png_ptr)
+{
+ return png_ptr->io_state;
+}
+
+png_uint_32 PNGAPI
+png_get_io_chunk_type (png_const_structp png_ptr)
+{
+ return ((png_ptr->chunk_name[0] << 24) +
+ (png_ptr->chunk_name[1] << 16) +
+ (png_ptr->chunk_name[2] << 8) +
+ (png_ptr->chunk_name[3]));
+}
+
+png_const_bytep PNGAPI
+png_get_io_chunk_name (png_structp png_ptr)
+{
+ return png_ptr->chunk_name;
+}
+#endif /* ?PNG_IO_STATE_SUPPORTED */
+
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
--- /dev/null
+
+/* pnginfo.h - header file for PNG reference library
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+ /* png_info is a structure that holds the information in a PNG file so
+ * that the application can find out the characteristics of the image.
+ * If you are reading the file, this structure will tell you what is
+ * in the PNG file. If you are writing the file, fill in the information
+ * you want to put into the PNG file, using png_set_*() functions, then
+ * call png_write_info().
+ *
+ * The names chosen should be very close to the PNG specification, so
+ * consult that document for information about the meaning of each field.
+ *
+ * With libpng < 0.95, it was only possible to directly set and read the
+ * the values in the png_info_struct, which meant that the contents and
+ * order of the values had to remain fixed. With libpng 0.95 and later,
+ * however, there are now functions that abstract the contents of
+ * png_info_struct from the application, so this makes it easier to use
+ * libpng with dynamic libraries, and even makes it possible to use
+ * libraries that don't have all of the libpng ancillary chunk-handing
+ * functionality. In libpng-1.5.0 this was moved into a separate private
+ * file that is not visible to applications.
+ *
+ * The following members may have allocated storage attached that should be
+ * cleaned up before the structure is discarded: palette, trans, text,
+ * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile,
+ * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these
+ * are automatically freed when the info structure is deallocated, if they were
+ * allocated internally by libpng. This behavior can be changed by means
+ * of the png_data_freer() function.
+ *
+ * More allocation details: all the chunk-reading functions that
+ * change these members go through the corresponding png_set_*
+ * functions. A function to clear these members is available: see
+ * png_free_data(). The png_set_* functions do not depend on being
+ * able to point info structure members to any of the storage they are
+ * passed (they make their own copies), EXCEPT that the png_set_text
+ * functions use the same storage passed to them in the text_ptr or
+ * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns
+ * functions do not make their own copies.
+ */
+#ifndef PNGINFO_H
+#define PNGINFO_H
+
+struct png_info_def
+{
+ /* the following are necessary for every PNG file */
+ png_uint_32 width; /* width of image in pixels (from IHDR) */
+ png_uint_32 height; /* height of image in pixels (from IHDR) */
+ png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */
+ png_size_t rowbytes; /* bytes needed to hold an untransformed row */
+ png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */
+ png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */
+ png_uint_16 num_trans; /* number of transparent palette color (tRNS) */
+ png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */
+ png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */
+ /* The following three should have been named *_method not *_type */
+ png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */
+ png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */
+ png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
+
+ /* The following is informational only on read, and not used on writes. */
+ png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */
+ png_byte pixel_depth; /* number of bits per pixel */
+ png_byte spare_byte; /* to align the data, and for future use */
+ png_byte signature[8]; /* magic bytes read by libpng from start of file */
+
+ /* The rest of the data is optional. If you are reading, check the
+ * valid field to see if the information in these are valid. If you
+ * are writing, set the valid field to those chunks you want written,
+ * and initialize the appropriate fields below.
+ */
+
+#if defined(PNG_gAMA_SUPPORTED)
+ /* The gAMA chunk describes the gamma characteristics of the system
+ * on which the image was created, normally in the range [1.0, 2.5].
+ * Data is valid if (valid & PNG_INFO_gAMA) is non-zero.
+ */
+ png_fixed_point gamma;
+#endif
+
+#ifdef PNG_sRGB_SUPPORTED
+ /* GR-P, 0.96a */
+ /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */
+ png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */
+#endif
+
+#ifdef PNG_TEXT_SUPPORTED
+ /* The tEXt, and zTXt chunks contain human-readable textual data in
+ * uncompressed, compressed, and optionally compressed forms, respectively.
+ * The data in "text" is an array of pointers to uncompressed,
+ * null-terminated C strings. Each chunk has a keyword that describes the
+ * textual data contained in that chunk. Keywords are not required to be
+ * unique, and the text string may be empty. Any number of text chunks may
+ * be in an image.
+ */
+ int num_text; /* number of comments read or comments to write */
+ int max_text; /* current size of text array */
+ png_textp text; /* array of comments read or comments to write */
+#endif /* PNG_TEXT_SUPPORTED */
+
+#ifdef PNG_tIME_SUPPORTED
+ /* The tIME chunk holds the last time the displayed image data was
+ * modified. See the png_time struct for the contents of this struct.
+ */
+ png_time mod_time;
+#endif
+
+#ifdef PNG_sBIT_SUPPORTED
+ /* The sBIT chunk specifies the number of significant high-order bits
+ * in the pixel data. Values are in the range [1, bit_depth], and are
+ * only specified for the channels in the pixel data. The contents of
+ * the low-order bits is not specified. Data is valid if
+ * (valid & PNG_INFO_sBIT) is non-zero.
+ */
+ png_color_8 sig_bit; /* significant bits in color channels */
+#endif
+
+#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
+defined(PNG_READ_BACKGROUND_SUPPORTED)
+ /* The tRNS chunk supplies transparency data for paletted images and
+ * other image types that don't need a full alpha channel. There are
+ * "num_trans" transparency values for a paletted image, stored in the
+ * same order as the palette colors, starting from index 0. Values
+ * for the data are in the range [0, 255], ranging from fully transparent
+ * to fully opaque, respectively. For non-paletted images, there is a
+ * single color specified that should be treated as fully transparent.
+ * Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
+ */
+ png_bytep trans; /* alpha values for paletted image */
+ png_bytep trans_alpha; /* alpha values for paletted image */
+ png_color_16 trans_color; /* transparent color for non-palette image */
+#endif
+
+#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ /* The bKGD chunk gives the suggested image background color if the
+ * display program does not have its own background color and the image
+ * is needs to composited onto a background before display. The colors
+ * in "background" are normally in the same color space/depth as the
+ * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero.
+ */
+ png_color_16 background;
+#endif
+
+#ifdef PNG_oFFs_SUPPORTED
+ /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards
+ * and downwards from the top-left corner of the display, page, or other
+ * application-specific co-ordinate space. See the PNG_OFFSET_ defines
+ * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero.
+ */
+ png_int_32 x_offset; /* x offset on page */
+ png_int_32 y_offset; /* y offset on page */
+ png_byte offset_unit_type; /* offset units type */
+#endif
+
+#ifdef PNG_pHYs_SUPPORTED
+ /* The pHYs chunk gives the physical pixel density of the image for
+ * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_
+ * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero.
+ */
+ png_uint_32 x_pixels_per_unit; /* horizontal pixel density */
+ png_uint_32 y_pixels_per_unit; /* vertical pixel density */
+ png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
+ /* The hIST chunk contains the relative frequency or importance of the
+ * various palette entries, so that a viewer can intelligently select a
+ * reduced-color palette, if required. Data is an array of "num_palette"
+ * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST)
+ * is non-zero.
+ */
+ png_uint_16p hist;
+#endif
+
+#ifdef PNG_cHRM_SUPPORTED
+ /* The cHRM chunk describes the CIE color characteristics of the monitor
+ * on which the PNG was created. This data allows the viewer to do gamut
+ * mapping of the input image to ensure that the viewer sees the same
+ * colors in the image as the creator. Values are in the range
+ * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero.
+ */
+ png_fixed_point x_white;
+ png_fixed_point y_white;
+ png_fixed_point x_red;
+ png_fixed_point y_red;
+ png_fixed_point x_green;
+ png_fixed_point y_green;
+ png_fixed_point x_blue;
+ png_fixed_point y_blue;
+#endif
+
+#ifdef PNG_pCAL_SUPPORTED
+ /* The pCAL chunk describes a transformation between the stored pixel
+ * values and original physical data values used to create the image.
+ * The integer range [0, 2^bit_depth - 1] maps to the floating-point
+ * range given by [pcal_X0, pcal_X1], and are further transformed by a
+ * (possibly non-linear) transformation function given by "pcal_type"
+ * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_
+ * defines below, and the PNG-Group's PNG extensions document for a
+ * complete description of the transformations and how they should be
+ * implemented, and for a description of the ASCII parameter strings.
+ * Data values are valid if (valid & PNG_INFO_pCAL) non-zero.
+ */
+ png_charp pcal_purpose; /* pCAL chunk description string */
+ png_int_32 pcal_X0; /* minimum value */
+ png_int_32 pcal_X1; /* maximum value */
+ png_charp pcal_units; /* Latin-1 string giving physical units */
+ png_charpp pcal_params; /* ASCII strings containing parameter values */
+ png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */
+ png_byte pcal_nparams; /* number of parameters given in pcal_params */
+#endif
+
+/* New members added in libpng-1.0.6 */
+ png_uint_32 free_me; /* flags items libpng is responsible for freeing */
+
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
+ defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
+ /* Storage for unknown chunks that the library doesn't recognize. */
+ png_unknown_chunkp unknown_chunks;
+ int unknown_chunks_num;
+#endif
+
+#ifdef PNG_iCCP_SUPPORTED
+ /* iCCP chunk data. */
+ png_charp iccp_name; /* profile name */
+ png_bytep iccp_profile; /* International Color Consortium profile data */
+ png_uint_32 iccp_proflen; /* ICC profile data length */
+ png_byte iccp_compression; /* Always zero */
+#endif
+
+#ifdef PNG_sPLT_SUPPORTED
+ /* Data on sPLT chunks (there may be more than one). */
+ png_sPLT_tp splt_palettes;
+ png_uint_32 splt_palettes_num;
+#endif
+
+#ifdef PNG_sCAL_SUPPORTED
+ /* The sCAL chunk describes the actual physical dimensions of the
+ * subject matter of the graphic. The chunk contains a unit specification
+ * a byte value, and two ASCII strings representing floating-point
+ * values. The values are width and height corresponsing to one pixel
+ * in the image. Data values are valid if (valid & PNG_INFO_sCAL) is
+ * non-zero.
+ */
+ png_byte scal_unit; /* unit of physical scale */
+ png_charp scal_s_width; /* string containing height */
+ png_charp scal_s_height; /* string containing width */
+#endif
+
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+ /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS)
+ non-zero */
+ /* Data valid if (valid & PNG_INFO_IDAT) non-zero */
+ png_bytepp row_pointers; /* the image bits */
+#endif
+
+};
+#endif /* PNGINFO_H */
--- /dev/null
+
+/* libpng STANDARD API DEFINITION */
+
+/* pnglibconf.h - library build configuration */
+
+/* libpng version 1.5.0 - last changed on February 11, 2011 */
+
+/* Copyright (c) 1998-2011 Glenn Randers-Pehrson */
+
+/* This code is released under the libpng license. */
+/* For conditions of distribution and use, see the disclaimer */
+/* and license in png.h */
+
+/* pnglibconf.h */
+/* Derived from: scripts/pnglibconf.dfa */
+/* If you edit this file by hand you must obey the rules expressed in */
+/* pnglibconf.dfa with respect to the dependencies between the following */
+/* symbols. It is much better to generate a new file using */
+/* scripts/libpngconf.mak */
+
+#ifndef PNGLCONF_H
+#define PNGLCONF_H
+/* settings */
+#define PNG_API_RULE 0
+#define PNG_CALLOC_SUPPORTED
+#define PNG_COST_SHIFT 3
+#define PNG_DEFAULT_READ_MACROS 1
+#define PNG_GAMMA_THRESHOLD_FIXED 5000
+#define PNG_MAX_GAMMA_8 11
+#define PNG_QUANTIZE_BLUE_BITS 5
+#define PNG_QUANTIZE_GREEN_BITS 5
+#define PNG_QUANTIZE_RED_BITS 5
+#define PNG_sCAL_PRECISION 5
+#define PNG_USER_CHUNK_CACHE_MAX 0
+#define PNG_USER_CHUNK_MALLOC_MAX 0
+#define PNG_USER_HEIGHT_MAX 1000000L
+#define PNG_USER_WIDTH_MAX 1000000L
+#define PNG_WEIGHT_SHIFT 8
+#define PNG_ZBUF_SIZE 8192
+/* end of settings */
+/* options */
+#define PNG_16BIT_SUPPORTED
+#define PNG_ALIGN_MEMORY_SUPPORTED
+#define PNG_BENIGN_ERRORS_SUPPORTED
+#define PNG_bKGD_SUPPORTED
+#define PNG_CHECK_cHRM_SUPPORTED
+#define PNG_cHRM_SUPPORTED
+#define PNG_CONSOLE_IO_SUPPORTED
+#define PNG_CONVERT_tIME_SUPPORTED
+#define PNG_EASY_ACCESS_SUPPORTED
+#define PNG_ERROR_TEXT_SUPPORTED
+#define PNG_FIXED_POINT_SUPPORTED
+#define PNG_FLOATING_ARITHMETIC_SUPPORTED
+#define PNG_FLOATING_POINT_SUPPORTED
+#define PNG_gAMA_SUPPORTED
+#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+#define PNG_hIST_SUPPORTED
+#define PNG_iCCP_SUPPORTED
+#define PNG_INCH_CONVERSIONS_SUPPORTED
+#define PNG_INFO_IMAGE_SUPPORTED
+#define PNG_IO_STATE_SUPPORTED
+#define PNG_iTXt_SUPPORTED
+#define PNG_MNG_FEATURES_SUPPORTED
+#define PNG_oFFs_SUPPORTED
+#define PNG_pCAL_SUPPORTED
+#define PNG_pHYs_SUPPORTED
+#define PNG_POINTER_INDEXING_SUPPORTED
+#define PNG_PROGRESSIVE_READ_SUPPORTED
+#define PNG_READ_16BIT_SUPPORTED
+#define PNG_READ_16_TO_8_SUPPORTED
+#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
+#define PNG_READ_BACKGROUND_SUPPORTED
+#define PNG_READ_BGR_SUPPORTED
+#define PNG_READ_bKGD_SUPPORTED
+#define PNG_READ_cHRM_SUPPORTED
+#define PNG_READ_COMPOSITE_NODIV_SUPPORTED
+#define PNG_READ_EXPAND_16_SUPPORTED
+#define PNG_READ_EXPAND_SUPPORTED
+#define PNG_READ_FILLER_SUPPORTED
+#define PNG_READ_gAMA_SUPPORTED
+#define PNG_READ_GAMMA_SUPPORTED
+#define PNG_READ_GRAY_TO_RGB_SUPPORTED
+#define PNG_READ_hIST_SUPPORTED
+#define PNG_READ_iCCP_SUPPORTED
+#define PNG_READ_INTERLACING_SUPPORTED
+#define PNG_READ_INT_FUNCTIONS_SUPPORTED
+#define PNG_READ_INVERT_ALPHA_SUPPORTED
+#define PNG_READ_INVERT_SUPPORTED
+#define PNG_READ_iTXt_SUPPORTED
+#define PNG_READ_oFFs_SUPPORTED
+#define PNG_READ_OPT_PLTE_SUPPORTED
+#define PNG_READ_PACK_SUPPORTED
+#define PNG_READ_PACKSWAP_SUPPORTED
+#define PNG_READ_pCAL_SUPPORTED
+#define PNG_READ_pHYs_SUPPORTED
+#define PNG_READ_QUANTIZE_SUPPORTED
+#define PNG_READ_RGB_TO_GRAY_SUPPORTED
+#define PNG_READ_sBIT_SUPPORTED
+#define PNG_READ_sCAL_SUPPORTED
+#define PNG_READ_SHIFT_SUPPORTED
+#define PNG_READ_sPLT_SUPPORTED
+#define PNG_READ_sRGB_SUPPORTED
+#define PNG_READ_STRIP_ALPHA_SUPPORTED
+#define PNG_READ_SUPPORTED
+#define PNG_READ_SWAP_ALPHA_SUPPORTED
+#define PNG_READ_SWAP_SUPPORTED
+#define PNG_READ_tEXt_SUPPORTED
+#define PNG_READ_TEXT_SUPPORTED
+#define PNG_READ_tIME_SUPPORTED
+#define PNG_READ_TRANSFORMS_SUPPORTED
+#define PNG_READ_tRNS_SUPPORTED
+#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
+#define PNG_READ_USER_CHUNKS_SUPPORTED
+#define PNG_READ_USER_TRANSFORM_SUPPORTED
+#define PNG_READ_zTXt_SUPPORTED
+#define PNG_SAVE_INT_32_SUPPORTED
+#define PNG_sBIT_SUPPORTED
+#define PNG_sCAL_SUPPORTED
+#define PNG_SEQUENTIAL_READ_SUPPORTED
+#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
+#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
+#define PNG_SETJMP_SUPPORTED
+#define PNG_SET_USER_LIMITS_SUPPORTED
+#define PNG_sPLT_SUPPORTED
+#define PNG_sRGB_SUPPORTED
+#define PNG_STDIO_SUPPORTED
+#define PNG_tEXt_SUPPORTED
+#define PNG_TEXT_SUPPORTED
+#define PNG_TIME_RFC1123_SUPPORTED
+#define PNG_tIME_SUPPORTED
+#define PNG_tRNS_SUPPORTED
+#define PNG_UNKNOWN_CHUNKS_SUPPORTED
+#define PNG_USER_CHUNKS_SUPPORTED
+#define PNG_USER_LIMITS_SUPPORTED
+#define PNG_USER_MEM_SUPPORTED
+#define PNG_USER_TRANSFORM_INFO_SUPPORTED
+#define PNG_USER_TRANSFORM_PTR_SUPPORTED
+#define PNG_WARNINGS_SUPPORTED
+#define PNG_WRITE_16BIT_SUPPORTED
+#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
+#define PNG_WRITE_BGR_SUPPORTED
+#define PNG_WRITE_bKGD_SUPPORTED
+#define PNG_WRITE_cHRM_SUPPORTED
+#define PNG_WRITE_FILLER_SUPPORTED
+#define PNG_WRITE_FILTER_SUPPORTED
+#define PNG_WRITE_FLUSH_SUPPORTED
+#define PNG_WRITE_gAMA_SUPPORTED
+#define PNG_WRITE_hIST_SUPPORTED
+#define PNG_WRITE_iCCP_SUPPORTED
+#define PNG_WRITE_INTERLACING_SUPPORTED
+#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
+#define PNG_WRITE_INVERT_ALPHA_SUPPORTED
+#define PNG_WRITE_INVERT_SUPPORTED
+#define PNG_WRITE_iTXt_SUPPORTED
+#define PNG_WRITE_oFFs_SUPPORTED
+#define PNG_WRITE_PACK_SUPPORTED
+#define PNG_WRITE_PACKSWAP_SUPPORTED
+#define PNG_WRITE_pCAL_SUPPORTED
+#define PNG_WRITE_pHYs_SUPPORTED
+#define PNG_WRITE_sBIT_SUPPORTED
+#define PNG_WRITE_sCAL_SUPPORTED
+#define PNG_WRITE_SHIFT_SUPPORTED
+#define PNG_WRITE_sPLT_SUPPORTED
+#define PNG_WRITE_sRGB_SUPPORTED
+#define PNG_WRITE_SUPPORTED
+#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
+#define PNG_WRITE_SWAP_SUPPORTED
+#define PNG_WRITE_tEXt_SUPPORTED
+#define PNG_WRITE_TEXT_SUPPORTED
+#define PNG_WRITE_tIME_SUPPORTED
+#define PNG_WRITE_TRANSFORMS_SUPPORTED
+#define PNG_WRITE_tRNS_SUPPORTED
+#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
+#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+#define PNG_WRITE_zTXt_SUPPORTED
+#define PNG_zTXt_SUPPORTED
+/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/
+/*#undef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED*/
+/* end of options */
+#endif /* PNGLCONF_H */
--- /dev/null
+
+/* pngmem.c - stub functions for memory allocation
+ *
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * This file provides a location for all memory allocation. Users who
+ * need special memory handling are expected to supply replacement
+ * functions for png_malloc() and png_free(), and to use
+ * png_create_read_struct_2() and png_create_write_struct_2() to
+ * identify the replacement functions.
+ */
+
+#include "pngpriv.h"
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
+/* Borland DOS special memory handler */
+#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
+/* If you change this, be sure to change the one in png.h also */
+
+/* Allocate memory for a png_struct. The malloc and memset can be replaced
+ by a single call to calloc() if this is thought to improve performance. */
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_create_struct,(int type),PNG_ALLOCATED)
+{
+# ifdef PNG_USER_MEM_SUPPORTED
+ return (png_create_struct_2(type, NULL, NULL));
+}
+
+/* Alternate version of png_create_struct, for use with user-defined malloc. */
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
+ PNG_ALLOCATED)
+{
+# endif /* PNG_USER_MEM_SUPPORTED */
+ png_size_t size;
+ png_voidp struct_ptr;
+
+ if (type == PNG_STRUCT_INFO)
+ size = png_sizeof(png_info);
+
+ else if (type == PNG_STRUCT_PNG)
+ size = png_sizeof(png_struct);
+
+ else
+ return (png_get_copyright(NULL));
+
+# ifdef PNG_USER_MEM_SUPPORTED
+ if (malloc_fn != NULL)
+ {
+ png_struct dummy_struct;
+ png_structp png_ptr = &dummy_struct;
+ png_ptr->mem_ptr=mem_ptr;
+ struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
+ }
+
+ else
+# endif /* PNG_USER_MEM_SUPPORTED */
+ struct_ptr = (png_voidp)farmalloc(size);
+ if (struct_ptr != NULL)
+ png_memset(struct_ptr, 0, size);
+
+ return (struct_ptr);
+}
+
+/* Free memory allocated by a png_create_struct() call */
+void /* PRIVATE */
+png_destroy_struct(png_voidp struct_ptr)
+{
+# ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2(struct_ptr, NULL, NULL);
+}
+
+/* Free memory allocated by a png_create_struct() call */
+void /* PRIVATE */
+png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
+ png_voidp mem_ptr)
+{
+# endif
+ if (struct_ptr != NULL)
+ {
+# ifdef PNG_USER_MEM_SUPPORTED
+ if (free_fn != NULL)
+ {
+ png_struct dummy_struct;
+ png_structp png_ptr = &dummy_struct;
+ png_ptr->mem_ptr=mem_ptr;
+ (*(free_fn))(png_ptr, struct_ptr);
+ return;
+ }
+
+# endif /* PNG_USER_MEM_SUPPORTED */
+ farfree (struct_ptr);
+ }
+}
+
+/* Allocate memory. For reasonable files, size should never exceed
+ * 64K. However, zlib may allocate more then 64K if you don't tell
+ * it not to. See zconf.h and png.h for more information. zlib does
+ * need to allocate exactly 64K, so whatever you call here must
+ * have the ability to do that.
+ *
+ * Borland seems to have a problem in DOS mode for exactly 64K.
+ * It gives you a segment with an offset of 8 (perhaps to store its
+ * memory stuff). zlib doesn't like this at all, so we have to
+ * detect and deal with it. This code should not be needed in
+ * Windows or OS/2 modes, and only in 16 bit mode. This code has
+ * been updated by Alexander Lehmann for version 0.89 to waste less
+ * memory.
+ *
+ * Note that we can't use png_size_t for the "size" declaration,
+ * since on some systems a png_size_t is a 16-bit quantity, and as a
+ * result, we would be truncating potentially larger memory requests
+ * (which should cause a fatal error) and introducing major problems.
+ */
+PNG_FUNCTION(png_voidp,PNGAPI
+png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
+{
+ png_voidp ret;
+
+ ret = (png_malloc(png_ptr, size));
+
+ if (ret != NULL)
+ png_memset(ret,0,(png_size_t)size);
+
+ return (ret);
+}
+
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
+{
+ png_voidp ret;
+
+ if (png_ptr == NULL || size == 0)
+ return (NULL);
+
+# ifdef PNG_USER_MEM_SUPPORTED
+ if (png_ptr->malloc_fn != NULL)
+ ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+
+ else
+ ret = (png_malloc_default(png_ptr, size));
+
+ if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr, "Out of memory");
+
+ return (ret);
+}
+
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
+{
+ png_voidp ret;
+# endif /* PNG_USER_MEM_SUPPORTED */
+
+ if (png_ptr == NULL || size == 0)
+ return (NULL);
+
+# ifdef PNG_MAX_MALLOC_64K
+ if (size > (png_uint_32)65536L)
+ {
+ png_warning(png_ptr, "Cannot Allocate > 64K");
+ ret = NULL;
+ }
+
+ else
+# endif
+
+ if (size != (size_t)size)
+ ret = NULL;
+
+ else if (size == (png_uint_32)65536L)
+ {
+ if (png_ptr->offset_table == NULL)
+ {
+ /* Try to see if we need to do any of this fancy stuff */
+ ret = farmalloc(size);
+ if (ret == NULL || ((png_size_t)ret & 0xffff))
+ {
+ int num_blocks;
+ png_uint_32 total_size;
+ png_bytep table;
+ int i;
+ png_byte huge * hptr;
+
+ if (ret != NULL)
+ {
+ farfree(ret);
+ ret = NULL;
+ }
+
+ if (png_ptr->zlib_window_bits > 14)
+ num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
+
+ else
+ num_blocks = 1;
+
+ if (png_ptr->zlib_mem_level >= 7)
+ num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7));
+
+ else
+ num_blocks++;
+
+ total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16;
+
+ table = farmalloc(total_size);
+
+ if (table == NULL)
+ {
+# ifndef PNG_USER_MEM_SUPPORTED
+ if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */
+
+ else
+ png_warning(png_ptr, "Out Of Memory");
+# endif
+ return (NULL);
+ }
+
+ if ((png_size_t)table & 0xfff0)
+ {
+# ifndef PNG_USER_MEM_SUPPORTED
+ if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr,
+ "Farmalloc didn't return normalized pointer");
+
+ else
+ png_warning(png_ptr,
+ "Farmalloc didn't return normalized pointer");
+# endif
+ return (NULL);
+ }
+
+ png_ptr->offset_table = table;
+ png_ptr->offset_table_ptr = farmalloc(num_blocks *
+ png_sizeof(png_bytep));
+
+ if (png_ptr->offset_table_ptr == NULL)
+ {
+# ifndef PNG_USER_MEM_SUPPORTED
+ if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */
+
+ else
+ png_warning(png_ptr, "Out Of memory");
+# endif
+ return (NULL);
+ }
+
+ hptr = (png_byte huge *)table;
+ if ((png_size_t)hptr & 0xf)
+ {
+ hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L);
+ hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */
+ }
+
+ for (i = 0; i < num_blocks; i++)
+ {
+ png_ptr->offset_table_ptr[i] = (png_bytep)hptr;
+ hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */
+ }
+
+ png_ptr->offset_table_number = num_blocks;
+ png_ptr->offset_table_count = 0;
+ png_ptr->offset_table_count_free = 0;
+ }
+ }
+
+ if (png_ptr->offset_table_count >= png_ptr->offset_table_number)
+ {
+# ifndef PNG_USER_MEM_SUPPORTED
+ if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr, "Out of Memory"); /* Note "o" and "M" */
+
+ else
+ png_warning(png_ptr, "Out of Memory");
+# endif
+ return (NULL);
+ }
+
+ ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++];
+ }
+
+ else
+ ret = farmalloc(size);
+
+# ifndef PNG_USER_MEM_SUPPORTED
+ if (ret == NULL)
+ {
+ if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */
+
+ else
+ png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */
+ }
+# endif
+
+ return (ret);
+}
+
+/* Free a pointer allocated by png_malloc(). In the default
+ * configuration, png_ptr is not used, but is passed in case it
+ * is needed. If ptr is NULL, return without taking any action.
+ */
+void PNGAPI
+png_free(png_structp png_ptr, png_voidp ptr)
+{
+ if (png_ptr == NULL || ptr == NULL)
+ return;
+
+# ifdef PNG_USER_MEM_SUPPORTED
+ if (png_ptr->free_fn != NULL)
+ {
+ (*(png_ptr->free_fn))(png_ptr, ptr);
+ return;
+ }
+
+ else
+ png_free_default(png_ptr, ptr);
+}
+
+void PNGAPI
+png_free_default(png_structp png_ptr, png_voidp ptr)
+{
+# endif /* PNG_USER_MEM_SUPPORTED */
+
+ if (png_ptr == NULL || ptr == NULL)
+ return;
+
+ if (png_ptr->offset_table != NULL)
+ {
+ int i;
+
+ for (i = 0; i < png_ptr->offset_table_count; i++)
+ {
+ if (ptr == png_ptr->offset_table_ptr[i])
+ {
+ ptr = NULL;
+ png_ptr->offset_table_count_free++;
+ break;
+ }
+ }
+ if (png_ptr->offset_table_count_free == png_ptr->offset_table_count)
+ {
+ farfree(png_ptr->offset_table);
+ farfree(png_ptr->offset_table_ptr);
+ png_ptr->offset_table = NULL;
+ png_ptr->offset_table_ptr = NULL;
+ }
+ }
+
+ if (ptr != NULL)
+ farfree(ptr);
+}
+
+#else /* Not the Borland DOS special memory handler */
+
+/* Allocate memory for a png_struct or a png_info. The malloc and
+ memset can be replaced by a single call to calloc() if this is thought
+ to improve performance noticably. */
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_create_struct,(int type),PNG_ALLOCATED)
+{
+# ifdef PNG_USER_MEM_SUPPORTED
+ return (png_create_struct_2(type, NULL, NULL));
+}
+
+/* Allocate memory for a png_struct or a png_info. The malloc and
+ memset can be replaced by a single call to calloc() if this is thought
+ to improve performance noticably. */
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
+ PNG_ALLOCATED)
+{
+# endif /* PNG_USER_MEM_SUPPORTED */
+ png_size_t size;
+ png_voidp struct_ptr;
+
+ if (type == PNG_STRUCT_INFO)
+ size = png_sizeof(png_info);
+
+ else if (type == PNG_STRUCT_PNG)
+ size = png_sizeof(png_struct);
+
+ else
+ return (NULL);
+
+# ifdef PNG_USER_MEM_SUPPORTED
+ if (malloc_fn != NULL)
+ {
+ png_struct dummy_struct;
+ png_structp png_ptr = &dummy_struct;
+ png_ptr->mem_ptr=mem_ptr;
+ struct_ptr = (*(malloc_fn))(png_ptr, size);
+
+ if (struct_ptr != NULL)
+ png_memset(struct_ptr, 0, size);
+
+ return (struct_ptr);
+ }
+# endif /* PNG_USER_MEM_SUPPORTED */
+
+# if defined(__TURBOC__) && !defined(__FLAT__)
+ struct_ptr = (png_voidp)farmalloc(size);
+# else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
+ struct_ptr = (png_voidp)halloc(size, 1);
+# else
+ struct_ptr = (png_voidp)malloc(size);
+# endif
+# endif
+
+ if (struct_ptr != NULL)
+ png_memset(struct_ptr, 0, size);
+
+ return (struct_ptr);
+}
+
+
+/* Free memory allocated by a png_create_struct() call */
+void /* PRIVATE */
+png_destroy_struct(png_voidp struct_ptr)
+{
+# ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2(struct_ptr, NULL, NULL);
+}
+
+/* Free memory allocated by a png_create_struct() call */
+void /* PRIVATE */
+png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
+ png_voidp mem_ptr)
+{
+# endif /* PNG_USER_MEM_SUPPORTED */
+ if (struct_ptr != NULL)
+ {
+# ifdef PNG_USER_MEM_SUPPORTED
+ if (free_fn != NULL)
+ {
+ png_struct dummy_struct;
+ png_structp png_ptr = &dummy_struct;
+ png_ptr->mem_ptr=mem_ptr;
+ (*(free_fn))(png_ptr, struct_ptr);
+ return;
+ }
+# endif /* PNG_USER_MEM_SUPPORTED */
+# if defined(__TURBOC__) && !defined(__FLAT__)
+ farfree(struct_ptr);
+
+# else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
+ hfree(struct_ptr);
+
+# else
+ free(struct_ptr);
+
+# endif
+# endif
+ }
+}
+
+/* Allocate memory. For reasonable files, size should never exceed
+ * 64K. However, zlib may allocate more then 64K if you don't tell
+ * it not to. See zconf.h and png.h for more information. zlib does
+ * need to allocate exactly 64K, so whatever you call here must
+ * have the ability to do that.
+ */
+
+PNG_FUNCTION(png_voidp,PNGAPI
+png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
+{
+ png_voidp ret;
+
+ ret = (png_malloc(png_ptr, size));
+
+ if (ret != NULL)
+ png_memset(ret,0,(png_size_t)size);
+
+ return (ret);
+}
+
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
+{
+ png_voidp ret;
+
+# ifdef PNG_USER_MEM_SUPPORTED
+ if (png_ptr == NULL || size == 0)
+ return (NULL);
+
+ if (png_ptr->malloc_fn != NULL)
+ ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+
+ else
+ ret = (png_malloc_default(png_ptr, size));
+
+ if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr, "Out of Memory");
+
+ return (ret);
+}
+
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
+{
+ png_voidp ret;
+# endif /* PNG_USER_MEM_SUPPORTED */
+
+ if (png_ptr == NULL || size == 0)
+ return (NULL);
+
+# ifdef PNG_MAX_MALLOC_64K
+ if (size > (png_uint_32)65536L)
+ {
+# ifndef PNG_USER_MEM_SUPPORTED
+ if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr, "Cannot Allocate > 64K");
+
+ else
+# endif
+ return NULL;
+ }
+# endif
+
+ /* Check for overflow */
+# if defined(__TURBOC__) && !defined(__FLAT__)
+
+ if (size != (unsigned long)size)
+ ret = NULL;
+
+ else
+ ret = farmalloc(size);
+
+# else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
+ if (size != (unsigned long)size)
+ ret = NULL;
+
+ else
+ ret = halloc(size, 1);
+
+# else
+ if (size != (size_t)size)
+ ret = NULL;
+
+ else
+ ret = malloc((size_t)size);
+# endif
+# endif
+
+# ifndef PNG_USER_MEM_SUPPORTED
+ if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+ png_error(png_ptr, "Out of Memory");
+# endif
+
+ return (ret);
+}
+
+/* Free a pointer allocated by png_malloc(). If ptr is NULL, return
+ * without taking any action.
+ */
+void PNGAPI
+png_free(png_structp png_ptr, png_voidp ptr)
+{
+ if (png_ptr == NULL || ptr == NULL)
+ return;
+
+# ifdef PNG_USER_MEM_SUPPORTED
+ if (png_ptr->free_fn != NULL)
+ {
+ (*(png_ptr->free_fn))(png_ptr, ptr);
+ return;
+ }
+
+ else
+ png_free_default(png_ptr, ptr);
+}
+
+void PNGAPI
+png_free_default(png_structp png_ptr, png_voidp ptr)
+{
+ if (png_ptr == NULL || ptr == NULL)
+ return;
+
+# endif /* PNG_USER_MEM_SUPPORTED */
+
+# if defined(__TURBOC__) && !defined(__FLAT__)
+ farfree(ptr);
+
+# else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
+ hfree(ptr);
+
+# else
+ free(ptr);
+
+# endif
+# endif
+}
+#endif /* Not Borland DOS special memory handler */
+
+/* This function was added at libpng version 1.2.3. The png_malloc_warn()
+ * function will set up png_malloc() to issue a png_warning and return NULL
+ * instead of issuing a png_error, if it fails to allocate the requested
+ * memory.
+ */
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
+{
+ png_voidp ptr;
+ png_uint_32 save_flags;
+ if (png_ptr == NULL)
+ return (NULL);
+
+ save_flags = png_ptr->flags;
+ png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
+ ptr = (png_voidp)png_malloc((png_structp)png_ptr, size);
+ png_ptr->flags=save_flags;
+ return(ptr);
+}
+
+
+#ifdef PNG_USER_MEM_SUPPORTED
+/* This function is called when the application wants to use another method
+ * of allocating and freeing memory.
+ */
+void PNGAPI
+png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
+ malloc_fn, png_free_ptr free_fn)
+{
+ if (png_ptr != NULL)
+ {
+ png_ptr->mem_ptr = mem_ptr;
+ png_ptr->malloc_fn = malloc_fn;
+ png_ptr->free_fn = free_fn;
+ }
+}
+
+/* This function returns a pointer to the mem_ptr associated with the user
+ * functions. The application should free any memory associated with this
+ * pointer before png_write_destroy and png_read_destroy are called.
+ */
+png_voidp PNGAPI
+png_get_mem_ptr(png_const_structp png_ptr)
+{
+ if (png_ptr == NULL)
+ return (NULL);
+
+ return ((png_voidp)png_ptr->mem_ptr);
+}
+#endif /* PNG_USER_MEM_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
--- /dev/null
+
+/* pngpread.c - read a png file in push mode
+ *
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+
+/* Push model modes */
+#define PNG_READ_SIG_MODE 0
+#define PNG_READ_CHUNK_MODE 1
+#define PNG_READ_IDAT_MODE 2
+#define PNG_SKIP_MODE 3
+#define PNG_READ_tEXt_MODE 4
+#define PNG_READ_zTXt_MODE 5
+#define PNG_READ_DONE_MODE 6
+#define PNG_READ_iTXt_MODE 7
+#define PNG_ERROR_MODE 8
+
+void PNGAPI
+png_process_data(png_structp png_ptr, png_infop info_ptr,
+ png_bytep buffer, png_size_t buffer_size)
+{
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ png_push_restore_buffer(png_ptr, buffer, buffer_size);
+
+ while (png_ptr->buffer_size)
+ {
+ png_process_some_data(png_ptr, info_ptr);
+ }
+}
+
+png_size_t PNGAPI
+png_process_data_pause(png_structp png_ptr, int save)
+{
+ if (png_ptr != NULL)
+ {
+ /* It's easiest for the caller if we do the save, then the caller doesn't
+ * have to supply the same data again:
+ */
+ if (save)
+ png_push_save_buffer(png_ptr);
+ else
+ {
+ /* This includes any pending saved bytes: */
+ png_size_t remaining = png_ptr->buffer_size;
+ png_ptr->buffer_size = 0;
+
+ /* So subtract the saved buffer size, unless all the data
+ * is actually 'saved', in which case we just return 0
+ */
+ if (png_ptr->save_buffer_size < remaining)
+ return remaining - png_ptr->save_buffer_size;
+ }
+ }
+
+ return 0;
+}
+
+png_uint_32 PNGAPI
+png_process_data_skip(png_structp png_ptr)
+{
+ png_uint_32 remaining = 0;
+
+ if (png_ptr != NULL && png_ptr->process_mode == PNG_SKIP_MODE &&
+ png_ptr->skip_length > 0)
+ {
+ /* At the end of png_process_data the buffer size must be 0 (see the loop
+ * above) so we can detect a broken call here:
+ */
+ if (png_ptr->buffer_size != 0)
+ png_error(png_ptr,
+ "png_process_data_skip called inside png_process_data");
+
+ /* If is impossible for there to be a saved buffer at this point -
+ * otherwise we could not be in SKIP mode. This will also happen if
+ * png_process_skip is called inside png_process_data (but only very
+ * rarely.)
+ */
+ if (png_ptr->save_buffer_size != 0)
+ png_error(png_ptr, "png_process_data_skip called with saved data");
+
+ remaining = png_ptr->skip_length;
+ png_ptr->skip_length = 0;
+ png_ptr->process_mode = PNG_READ_CHUNK_MODE;
+ }
+
+ return remaining;
+}
+
+/* What we do with the incoming data depends on what we were previously
+ * doing before we ran out of data...
+ */
+void /* PRIVATE */
+png_process_some_data(png_structp png_ptr, png_infop info_ptr)
+{
+ if (png_ptr == NULL)
+ return;
+
+ switch (png_ptr->process_mode)
+ {
+ case PNG_READ_SIG_MODE:
+ {
+ png_push_read_sig(png_ptr, info_ptr);
+ break;
+ }
+
+ case PNG_READ_CHUNK_MODE:
+ {
+ png_push_read_chunk(png_ptr, info_ptr);
+ break;
+ }
+
+ case PNG_READ_IDAT_MODE:
+ {
+ png_push_read_IDAT(png_ptr);
+ break;
+ }
+
+#ifdef PNG_READ_tEXt_SUPPORTED
+ case PNG_READ_tEXt_MODE:
+ {
+ png_push_read_tEXt(png_ptr, info_ptr);
+ break;
+ }
+
+#endif
+#ifdef PNG_READ_zTXt_SUPPORTED
+ case PNG_READ_zTXt_MODE:
+ {
+ png_push_read_zTXt(png_ptr, info_ptr);
+ break;
+ }
+
+#endif
+#ifdef PNG_READ_iTXt_SUPPORTED
+ case PNG_READ_iTXt_MODE:
+ {
+ png_push_read_iTXt(png_ptr, info_ptr);
+ break;
+ }
+
+#endif
+ case PNG_SKIP_MODE:
+ {
+ png_push_crc_finish(png_ptr);
+ break;
+ }
+
+ default:
+ {
+ png_ptr->buffer_size = 0;
+ break;
+ }
+ }
+}
+
+/* Read any remaining signature bytes from the stream and compare them with
+ * the correct PNG signature. It is possible that this routine is called
+ * with bytes already read from the signature, either because they have been
+ * checked by the calling application, or because of multiple calls to this
+ * routine.
+ */
+void /* PRIVATE */
+png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
+{
+ png_size_t num_checked = png_ptr->sig_bytes,
+ num_to_check = 8 - num_checked;
+
+ if (png_ptr->buffer_size < num_to_check)
+ {
+ num_to_check = png_ptr->buffer_size;
+ }
+
+ png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
+ num_to_check);
+ png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check);
+
+ if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
+ {
+ if (num_checked < 4 &&
+ png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
+ png_error(png_ptr, "Not a PNG file");
+
+ else
+ png_error(png_ptr, "PNG file corrupted by ASCII conversion");
+ }
+ else
+ {
+ if (png_ptr->sig_bytes >= 8)
+ {
+ png_ptr->process_mode = PNG_READ_CHUNK_MODE;
+ }
+ }
+}
+
+void /* PRIVATE */
+png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
+{
+ PNG_IHDR;
+ PNG_IDAT;
+ PNG_IEND;
+ PNG_PLTE;
+#ifdef PNG_READ_bKGD_SUPPORTED
+ PNG_bKGD;
+#endif
+#ifdef PNG_READ_cHRM_SUPPORTED
+ PNG_cHRM;
+#endif
+#ifdef PNG_READ_gAMA_SUPPORTED
+ PNG_gAMA;
+#endif
+#ifdef PNG_READ_hIST_SUPPORTED
+ PNG_hIST;
+#endif
+#ifdef PNG_READ_iCCP_SUPPORTED
+ PNG_iCCP;
+#endif
+#ifdef PNG_READ_iTXt_SUPPORTED
+ PNG_iTXt;
+#endif
+#ifdef PNG_READ_oFFs_SUPPORTED
+ PNG_oFFs;
+#endif
+#ifdef PNG_READ_pCAL_SUPPORTED
+ PNG_pCAL;
+#endif
+#ifdef PNG_READ_pHYs_SUPPORTED
+ PNG_pHYs;
+#endif
+#ifdef PNG_READ_sBIT_SUPPORTED
+ PNG_sBIT;
+#endif
+#ifdef PNG_READ_sCAL_SUPPORTED
+ PNG_sCAL;
+#endif
+#ifdef PNG_READ_sRGB_SUPPORTED
+ PNG_sRGB;
+#endif
+#ifdef PNG_READ_sPLT_SUPPORTED
+ PNG_sPLT;
+#endif
+#ifdef PNG_READ_tEXt_SUPPORTED
+ PNG_tEXt;
+#endif
+#ifdef PNG_READ_tIME_SUPPORTED
+ PNG_tIME;
+#endif
+#ifdef PNG_READ_tRNS_SUPPORTED
+ PNG_tRNS;
+#endif
+#ifdef PNG_READ_zTXt_SUPPORTED
+ PNG_zTXt;
+#endif
+
+ /* First we make sure we have enough data for the 4 byte chunk name
+ * and the 4 byte chunk length before proceeding with decoding the
+ * chunk data. To fully decode each of these chunks, we also make
+ * sure we have enough data in the buffer for the 4 byte CRC at the
+ * end of every chunk (except IDAT, which is handled separately).
+ */
+ if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
+ {
+ png_byte chunk_length[4];
+
+ if (png_ptr->buffer_size < 8)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_fill_buffer(png_ptr, chunk_length, 4);
+ png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
+ png_reset_crc(png_ptr);
+ png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+ png_check_chunk_name(png_ptr, png_ptr->chunk_name);
+ png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
+ }
+
+ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ if (png_ptr->mode & PNG_AFTER_IDAT)
+ png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
+
+ if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
+ {
+ if (png_ptr->push_length != 13)
+ png_error(png_ptr, "Invalid IHDR length");
+
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+ else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_IEND(png_ptr, info_ptr, png_ptr->push_length);
+
+ png_ptr->process_mode = PNG_READ_DONE_MODE;
+ png_push_have_end(png_ptr, info_ptr);
+ }
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ png_ptr->mode |= PNG_HAVE_IDAT;
+
+ png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
+
+ if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+ png_ptr->mode |= PNG_HAVE_PLTE;
+
+ else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ {
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before IDAT");
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
+ !(png_ptr->mode & PNG_HAVE_PLTE))
+ png_error(png_ptr, "Missing PLTE before IDAT");
+ }
+ }
+
+#endif
+ else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+ png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+ else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ {
+ /* If we reach an IDAT chunk, this means we have read all of the
+ * header chunks, and we can start reading the image (or if this
+ * is called after the image has been read - we have an error).
+ */
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before IDAT");
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
+ !(png_ptr->mode & PNG_HAVE_PLTE))
+ png_error(png_ptr, "Missing PLTE before IDAT");
+
+ if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ if (!(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
+ if (png_ptr->push_length == 0)
+ return;
+
+ if (png_ptr->mode & PNG_AFTER_IDAT)
+ png_benign_error(png_ptr, "Too many IDATs found");
+ }
+
+ png_ptr->idat_size = png_ptr->push_length;
+ png_ptr->mode |= PNG_HAVE_IDAT;
+ png_ptr->process_mode = PNG_READ_IDAT_MODE;
+ png_push_have_info(png_ptr, info_ptr);
+ png_ptr->zstream.avail_out =
+ (uInt) PNG_ROWBYTES(png_ptr->pixel_depth,
+ png_ptr->iwidth) + 1;
+ png_ptr->zstream.next_out = png_ptr->row_buf;
+ return;
+ }
+
+#ifdef PNG_READ_gAMA_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_gAMA(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_sBIT_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_sBIT(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_cHRM_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_sRGB_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_sRGB(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_iCCP_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_iCCP(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_sPLT_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_sPLT(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_tRNS_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_tRNS(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_bKGD_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_hIST_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_hIST(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_pHYs_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_pHYs(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_oFFs_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length);
+ }
+#endif
+
+#ifdef PNG_READ_pCAL_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_sCAL_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_sCAL(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_tIME_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_handle_tIME(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_tEXt_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_zTXt_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+#ifdef PNG_READ_iTXt_SUPPORTED
+ else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+#endif
+ else
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+ png_push_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
+ }
+
+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
+}
+
+void /* PRIVATE */
+png_push_crc_skip(png_structp png_ptr, png_uint_32 skip)
+{
+ png_ptr->process_mode = PNG_SKIP_MODE;
+ png_ptr->skip_length = skip;
+}
+
+void /* PRIVATE */
+png_push_crc_finish(png_structp png_ptr)
+{
+ if (png_ptr->skip_length && png_ptr->save_buffer_size)
+ {
+ png_size_t save_size = png_ptr->save_buffer_size;
+ png_uint_32 skip_length = png_ptr->skip_length;
+
+ /* We want the smaller of 'skip_length' and 'save_buffer_size', but
+ * they are of different types and we don't know which variable has the
+ * fewest bits. Carefully select the smaller and cast it to the type of
+ * the larger - this cannot overflow. Do not cast in the following test
+ * - it will break on either 16 or 64 bit platforms.
+ */
+ if (skip_length < save_size)
+ save_size = (png_size_t)skip_length;
+
+ else
+ skip_length = (png_uint_32)save_size;
+
+ png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
+
+ png_ptr->skip_length -= skip_length;
+ png_ptr->buffer_size -= save_size;
+ png_ptr->save_buffer_size -= save_size;
+ png_ptr->save_buffer_ptr += save_size;
+ }
+ if (png_ptr->skip_length && png_ptr->current_buffer_size)
+ {
+ png_size_t save_size = png_ptr->current_buffer_size;
+ png_uint_32 skip_length = png_ptr->skip_length;
+
+ /* We want the smaller of 'skip_length' and 'current_buffer_size', here,
+ * the same problem exists as above and the same solution.
+ */
+ if (skip_length < save_size)
+ save_size = (png_size_t)skip_length;
+
+ else
+ skip_length = (png_uint_32)save_size;
+
+ png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
+
+ png_ptr->skip_length -= skip_length;
+ png_ptr->buffer_size -= save_size;
+ png_ptr->current_buffer_size -= save_size;
+ png_ptr->current_buffer_ptr += save_size;
+ }
+ if (!png_ptr->skip_length)
+ {
+ if (png_ptr->buffer_size < 4)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_crc_finish(png_ptr, 0);
+ png_ptr->process_mode = PNG_READ_CHUNK_MODE;
+ }
+}
+
+void PNGCBAPI
+png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
+{
+ png_bytep ptr;
+
+ if (png_ptr == NULL)
+ return;
+
+ ptr = buffer;
+ if (png_ptr->save_buffer_size)
+ {
+ png_size_t save_size;
+
+ if (length < png_ptr->save_buffer_size)
+ save_size = length;
+
+ else
+ save_size = png_ptr->save_buffer_size;
+
+ png_memcpy(ptr, png_ptr->save_buffer_ptr, save_size);
+ length -= save_size;
+ ptr += save_size;
+ png_ptr->buffer_size -= save_size;
+ png_ptr->save_buffer_size -= save_size;
+ png_ptr->save_buffer_ptr += save_size;
+ }
+ if (length && png_ptr->current_buffer_size)
+ {
+ png_size_t save_size;
+
+ if (length < png_ptr->current_buffer_size)
+ save_size = length;
+
+ else
+ save_size = png_ptr->current_buffer_size;
+
+ png_memcpy(ptr, png_ptr->current_buffer_ptr, save_size);
+ png_ptr->buffer_size -= save_size;
+ png_ptr->current_buffer_size -= save_size;
+ png_ptr->current_buffer_ptr += save_size;
+ }
+}
+
+void /* PRIVATE */
+png_push_save_buffer(png_structp png_ptr)
+{
+ if (png_ptr->save_buffer_size)
+ {
+ if (png_ptr->save_buffer_ptr != png_ptr->save_buffer)
+ {
+ png_size_t i, istop;
+ png_bytep sp;
+ png_bytep dp;
+
+ istop = png_ptr->save_buffer_size;
+ for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer;
+ i < istop; i++, sp++, dp++)
+ {
+ *dp = *sp;
+ }
+ }
+ }
+ if (png_ptr->save_buffer_size + png_ptr->current_buffer_size >
+ png_ptr->save_buffer_max)
+ {
+ png_size_t new_max;
+ png_bytep old_buffer;
+
+ if (png_ptr->save_buffer_size > PNG_SIZE_MAX -
+ (png_ptr->current_buffer_size + 256))
+ {
+ png_error(png_ptr, "Potential overflow of save_buffer");
+ }
+
+ new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
+ old_buffer = png_ptr->save_buffer;
+ png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr,
+ (png_size_t)new_max);
+
+ if (png_ptr->save_buffer == NULL)
+ {
+ png_free(png_ptr, old_buffer);
+ png_error(png_ptr, "Insufficient memory for save_buffer");
+ }
+
+ png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
+ png_free(png_ptr, old_buffer);
+ png_ptr->save_buffer_max = new_max;
+ }
+ if (png_ptr->current_buffer_size)
+ {
+ png_memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size,
+ png_ptr->current_buffer_ptr, png_ptr->current_buffer_size);
+ png_ptr->save_buffer_size += png_ptr->current_buffer_size;
+ png_ptr->current_buffer_size = 0;
+ }
+ png_ptr->save_buffer_ptr = png_ptr->save_buffer;
+ png_ptr->buffer_size = 0;
+}
+
+void /* PRIVATE */
+png_push_restore_buffer(png_structp png_ptr, png_bytep buffer,
+ png_size_t buffer_length)
+{
+ png_ptr->current_buffer = buffer;
+ png_ptr->current_buffer_size = buffer_length;
+ png_ptr->buffer_size = buffer_length + png_ptr->save_buffer_size;
+ png_ptr->current_buffer_ptr = png_ptr->current_buffer;
+}
+
+void /* PRIVATE */
+png_push_read_IDAT(png_structp png_ptr)
+{
+ PNG_IDAT;
+ if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
+ {
+ png_byte chunk_length[4];
+
+ if (png_ptr->buffer_size < 8)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_fill_buffer(png_ptr, chunk_length, 4);
+ png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
+ png_reset_crc(png_ptr);
+ png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+ png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
+
+ if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ {
+ png_ptr->process_mode = PNG_READ_CHUNK_MODE;
+
+ if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
+ png_error(png_ptr, "Not enough compressed data");
+
+ return;
+ }
+
+ png_ptr->idat_size = png_ptr->push_length;
+ }
+ if (png_ptr->idat_size && png_ptr->save_buffer_size)
+ {
+ png_size_t save_size = png_ptr->save_buffer_size;
+ png_uint_32 idat_size = png_ptr->idat_size;
+
+ /* We want the smaller of 'idat_size' and 'current_buffer_size', but they
+ * are of different types and we don't know which variable has the fewest
+ * bits. Carefully select the smaller and cast it to the type of the
+ * larger - this cannot overflow. Do not cast in the following test - it
+ * will break on either 16 or 64 bit platforms.
+ */
+ if (idat_size < save_size)
+ save_size = (png_size_t)idat_size;
+
+ else
+ idat_size = (png_uint_32)save_size;
+
+ png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
+
+ png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size);
+
+ png_ptr->idat_size -= idat_size;
+ png_ptr->buffer_size -= save_size;
+ png_ptr->save_buffer_size -= save_size;
+ png_ptr->save_buffer_ptr += save_size;
+ }
+
+ if (png_ptr->idat_size && png_ptr->current_buffer_size)
+ {
+ png_size_t save_size = png_ptr->current_buffer_size;
+ png_uint_32 idat_size = png_ptr->idat_size;
+
+ /* We want the smaller of 'idat_size' and 'current_buffer_size', but they
+ * are of different types and we don't know which variable has the fewest
+ * bits. Carefully select the smaller and cast it to the type of the
+ * larger - this cannot overflow.
+ */
+ if (idat_size < save_size)
+ save_size = (png_size_t)idat_size;
+
+ else
+ idat_size = (png_uint_32)save_size;
+
+ png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
+
+ png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size);
+
+ png_ptr->idat_size -= idat_size;
+ png_ptr->buffer_size -= save_size;
+ png_ptr->current_buffer_size -= save_size;
+ png_ptr->current_buffer_ptr += save_size;
+ }
+ if (!png_ptr->idat_size)
+ {
+ if (png_ptr->buffer_size < 4)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_crc_finish(png_ptr, 0);
+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
+ png_ptr->mode |= PNG_AFTER_IDAT;
+ }
+}
+
+void /* PRIVATE */
+png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
+ png_size_t buffer_length)
+{
+ /* The caller checks for a non-zero buffer length. */
+ if (!(buffer_length > 0) || buffer == NULL)
+ png_error(png_ptr, "No IDAT data (internal error)");
+
+ /* This routine must process all the data it has been given
+ * before returning, calling the row callback as required to
+ * handle the uncompressed results.
+ */
+ png_ptr->zstream.next_in = buffer;
+ png_ptr->zstream.avail_in = (uInt)buffer_length;
+
+ /* Keep going until the decompressed data is all processed
+ * or the stream marked as finished.
+ */
+ while (png_ptr->zstream.avail_in > 0 &&
+ !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
+ {
+ int ret;
+
+ /* We have data for zlib, but we must check that zlib
+ * has someplace to put the results. It doesn't matter
+ * if we don't expect any results -- it may be the input
+ * data is just the LZ end code.
+ */
+ if (!(png_ptr->zstream.avail_out > 0))
+ {
+ png_ptr->zstream.avail_out =
+ (uInt) PNG_ROWBYTES(png_ptr->pixel_depth,
+ png_ptr->iwidth) + 1;
+
+ png_ptr->zstream.next_out = png_ptr->row_buf;
+ }
+
+ /* Using Z_SYNC_FLUSH here means that an unterminated
+ * LZ stream (a stream with a missing end code) can still
+ * be handled, otherwise (Z_NO_FLUSH) a future zlib
+ * implementation might defer output and therefore
+ * change the current behavior (see comments in inflate.c
+ * for why this doesn't happen at present with zlib 1.2.5).
+ */
+ ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH);
+
+ /* Check for any failure before proceeding. */
+ if (ret != Z_OK && ret != Z_STREAM_END)
+ {
+ /* Terminate the decompression. */
+ png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+
+ /* This may be a truncated stream (missing or
+ * damaged end code). Treat that as a warning.
+ */
+ if (png_ptr->row_number >= png_ptr->num_rows ||
+ png_ptr->pass > 6)
+ png_warning(png_ptr, "Truncated compressed data in IDAT");
+
+ else
+ png_error(png_ptr, "Decompression error in IDAT");
+
+ /* Skip the check on unprocessed input */
+ return;
+ }
+
+ /* Did inflate output any data? */
+ if (png_ptr->zstream.next_out != png_ptr->row_buf)
+ {
+ /* Is this unexpected data after the last row?
+ * If it is, artificially terminate the LZ output
+ * here.
+ */
+ if (png_ptr->row_number >= png_ptr->num_rows ||
+ png_ptr->pass > 6)
+ {
+ /* Extra data. */
+ png_warning(png_ptr, "Extra compressed data in IDAT");
+ png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+
+ /* Do no more processing; skip the unprocessed
+ * input check below.
+ */
+ return;
+ }
+
+ /* Do we have a complete row? */
+ if (png_ptr->zstream.avail_out == 0)
+ png_push_process_row(png_ptr);
+ }
+
+ /* And check for the end of the stream. */
+ if (ret == Z_STREAM_END)
+ png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+ }
+
+ /* All the data should have been processed, if anything
+ * is left at this point we have bytes of IDAT data
+ * after the zlib end code.
+ */
+ if (png_ptr->zstream.avail_in > 0)
+ png_warning(png_ptr, "Extra compression data in IDAT");
+}
+
+void /* PRIVATE */
+png_push_process_row(png_structp png_ptr)
+{
+ png_ptr->row_info.color_type = png_ptr->color_type;
+ png_ptr->row_info.width = png_ptr->iwidth;
+ png_ptr->row_info.channels = png_ptr->channels;
+ png_ptr->row_info.bit_depth = png_ptr->bit_depth;
+ png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
+
+ png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
+ png_ptr->row_info.width);
+
+ png_read_filter_row(png_ptr, &(png_ptr->row_info),
+ png_ptr->row_buf + 1, png_ptr->prev_row + 1,
+ (int)(png_ptr->row_buf[0]));
+
+ png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
+
+ if (png_ptr->transformations)
+ png_do_read_transformations(png_ptr);
+
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ /* Blow up interlaced rows to full size */
+ if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
+ {
+ if (png_ptr->pass < 6)
+/* old interface (pre-1.0.9):
+ png_do_read_interlace(&(png_ptr->row_info),
+ png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
+ */
+ png_do_read_interlace(png_ptr);
+
+ switch (png_ptr->pass)
+ {
+ case 0:
+ {
+ int i;
+ for (i = 0; i < 8 && png_ptr->pass == 0; i++)
+ {
+ png_push_have_row(png_ptr, png_ptr->row_buf + 1);
+ png_read_push_finish_row(png_ptr); /* Updates png_ptr->pass */
+ }
+
+ if (png_ptr->pass == 2) /* Pass 1 might be empty */
+ {
+ for (i = 0; i < 4 && png_ptr->pass == 2; i++)
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+ }
+
+ if (png_ptr->pass == 4 && png_ptr->height <= 4)
+ {
+ for (i = 0; i < 2 && png_ptr->pass == 4; i++)
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+ }
+
+ if (png_ptr->pass == 6 && png_ptr->height <= 4)
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ break;
+ }
+
+ case 1:
+ {
+ int i;
+ for (i = 0; i < 8 && png_ptr->pass == 1; i++)
+ {
+ png_push_have_row(png_ptr, png_ptr->row_buf + 1);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ if (png_ptr->pass == 2) /* Skip top 4 generated rows */
+ {
+ for (i = 0; i < 4 && png_ptr->pass == 2; i++)
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+ }
+
+ break;
+ }
+
+ case 2:
+ {
+ int i;
+
+ for (i = 0; i < 4 && png_ptr->pass == 2; i++)
+ {
+ png_push_have_row(png_ptr, png_ptr->row_buf + 1);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ for (i = 0; i < 4 && png_ptr->pass == 2; i++)
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ if (png_ptr->pass == 4) /* Pass 3 might be empty */
+ {
+ for (i = 0; i < 2 && png_ptr->pass == 4; i++)
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+ }
+
+ break;
+ }
+
+ case 3:
+ {
+ int i;
+
+ for (i = 0; i < 4 && png_ptr->pass == 3; i++)
+ {
+ png_push_have_row(png_ptr, png_ptr->row_buf + 1);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ if (png_ptr->pass == 4) /* Skip top two generated rows */
+ {
+ for (i = 0; i < 2 && png_ptr->pass == 4; i++)
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+ }
+
+ break;
+ }
+
+ case 4:
+ {
+ int i;
+
+ for (i = 0; i < 2 && png_ptr->pass == 4; i++)
+ {
+ png_push_have_row(png_ptr, png_ptr->row_buf + 1);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ for (i = 0; i < 2 && png_ptr->pass == 4; i++)
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ if (png_ptr->pass == 6) /* Pass 5 might be empty */
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ break;
+ }
+
+ case 5:
+ {
+ int i;
+
+ for (i = 0; i < 2 && png_ptr->pass == 5; i++)
+ {
+ png_push_have_row(png_ptr, png_ptr->row_buf + 1);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ if (png_ptr->pass == 6) /* Skip top generated row */
+ {
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+
+ break;
+ }
+
+ default:
+ case 6:
+ {
+ png_push_have_row(png_ptr, png_ptr->row_buf + 1);
+ png_read_push_finish_row(png_ptr);
+
+ if (png_ptr->pass != 6)
+ break;
+
+ png_push_have_row(png_ptr, NULL);
+ png_read_push_finish_row(png_ptr);
+ }
+ }
+ }
+ else
+#endif
+ {
+ png_push_have_row(png_ptr, png_ptr->row_buf + 1);
+ png_read_push_finish_row(png_ptr);
+ }
+}
+
+void /* PRIVATE */
+png_read_push_finish_row(png_structp png_ptr)
+{
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* Start of interlace block */
+ PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* Offset to next interlace block */
+ PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* Start of interlace block in the y direction */
+ PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* Offset to next interlace block in the y direction */
+ PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
+
+ /* Height of interlace block. This is not currently used - if you need
+ * it, uncomment it here and in png.h
+ PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
+ */
+
+ png_ptr->row_number++;
+ if (png_ptr->row_number < png_ptr->num_rows)
+ return;
+
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ if (png_ptr->interlaced)
+ {
+ png_ptr->row_number = 0;
+ png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
+
+ do
+ {
+ png_ptr->pass++;
+ if ((png_ptr->pass == 1 && png_ptr->width < 5) ||
+ (png_ptr->pass == 3 && png_ptr->width < 3) ||
+ (png_ptr->pass == 5 && png_ptr->width < 2))
+ png_ptr->pass++;
+
+ if (png_ptr->pass > 7)
+ png_ptr->pass--;
+
+ if (png_ptr->pass >= 7)
+ break;
+
+ png_ptr->iwidth = (png_ptr->width +
+ png_pass_inc[png_ptr->pass] - 1 -
+ png_pass_start[png_ptr->pass]) /
+ png_pass_inc[png_ptr->pass];
+
+ if (png_ptr->transformations & PNG_INTERLACE)
+ break;
+
+ png_ptr->num_rows = (png_ptr->height +
+ png_pass_yinc[png_ptr->pass] - 1 -
+ png_pass_ystart[png_ptr->pass]) /
+ png_pass_yinc[png_ptr->pass];
+
+ } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
+ }
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
+}
+
+#ifdef PNG_READ_tEXt_SUPPORTED
+void /* PRIVATE */
+png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
+ length)
+{
+ if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
+ {
+ PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
+ png_error(png_ptr, "Out of place tEXt");
+ /*NOT REACHED*/
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ png_ptr->skip_length = 0; /* This may not be necessary */
+
+ if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
+ {
+ png_warning(png_ptr, "tEXt chunk too large to fit in memory");
+ png_ptr->skip_length = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ png_ptr->current_text = (png_charp)png_malloc(png_ptr,
+ (png_size_t)(length + 1));
+ png_ptr->current_text[length] = '\0';
+ png_ptr->current_text_ptr = png_ptr->current_text;
+ png_ptr->current_text_size = (png_size_t)length;
+ png_ptr->current_text_left = (png_size_t)length;
+ png_ptr->process_mode = PNG_READ_tEXt_MODE;
+}
+
+void /* PRIVATE */
+png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
+{
+ if (png_ptr->buffer_size && png_ptr->current_text_left)
+ {
+ png_size_t text_size;
+
+ if (png_ptr->buffer_size < png_ptr->current_text_left)
+ text_size = png_ptr->buffer_size;
+
+ else
+ text_size = png_ptr->current_text_left;
+
+ png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
+ png_ptr->current_text_left -= text_size;
+ png_ptr->current_text_ptr += text_size;
+ }
+ if (!(png_ptr->current_text_left))
+ {
+ png_textp text_ptr;
+ png_charp text;
+ png_charp key;
+ int ret;
+
+ if (png_ptr->buffer_size < 4)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_crc_finish(png_ptr);
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (png_ptr->skip_length)
+ return;
+#endif
+
+ key = png_ptr->current_text;
+
+ for (text = key; *text; text++)
+ /* Empty loop */ ;
+
+ if (text < key + png_ptr->current_text_size)
+ text++;
+
+ text_ptr = (png_textp)png_malloc(png_ptr, png_sizeof(png_text));
+ text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
+ text_ptr->key = key;
+ text_ptr->itxt_length = 0;
+ text_ptr->lang = NULL;
+ text_ptr->lang_key = NULL;
+ text_ptr->text = text;
+
+ ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+
+ png_free(png_ptr, key);
+ png_free(png_ptr, text_ptr);
+ png_ptr->current_text = NULL;
+
+ if (ret)
+ png_warning(png_ptr, "Insufficient memory to store text chunk");
+ }
+}
+#endif
+
+#ifdef PNG_READ_zTXt_SUPPORTED
+void /* PRIVATE */
+png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
+ length)
+{
+ if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
+ {
+ PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
+ png_error(png_ptr, "Out of place zTXt");
+ /*NOT REACHED*/
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ /* We can't handle zTXt chunks > 64K, since we don't have enough space
+ * to be able to store the uncompressed data. Actually, the threshold
+ * is probably around 32K, but it isn't as definite as 64K is.
+ */
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "zTXt chunk too large to fit in memory");
+ png_push_crc_skip(png_ptr, length);
+ return;
+ }
+#endif
+
+ png_ptr->current_text = (png_charp)png_malloc(png_ptr,
+ (png_size_t)(length + 1));
+ png_ptr->current_text[length] = '\0';
+ png_ptr->current_text_ptr = png_ptr->current_text;
+ png_ptr->current_text_size = (png_size_t)length;
+ png_ptr->current_text_left = (png_size_t)length;
+ png_ptr->process_mode = PNG_READ_zTXt_MODE;
+}
+
+void /* PRIVATE */
+png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
+{
+ if (png_ptr->buffer_size && png_ptr->current_text_left)
+ {
+ png_size_t text_size;
+
+ if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left)
+ text_size = png_ptr->buffer_size;
+
+ else
+ text_size = png_ptr->current_text_left;
+
+ png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
+ png_ptr->current_text_left -= text_size;
+ png_ptr->current_text_ptr += text_size;
+ }
+ if (!(png_ptr->current_text_left))
+ {
+ png_textp text_ptr;
+ png_charp text;
+ png_charp key;
+ int ret;
+ png_size_t text_size, key_size;
+
+ if (png_ptr->buffer_size < 4)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_crc_finish(png_ptr);
+
+ key = png_ptr->current_text;
+
+ for (text = key; *text; text++)
+ /* Empty loop */ ;
+
+ /* zTXt can't have zero text */
+ if (text >= key + png_ptr->current_text_size)
+ {
+ png_ptr->current_text = NULL;
+ png_free(png_ptr, key);
+ return;
+ }
+
+ text++;
+
+ if (*text != PNG_TEXT_COMPRESSION_zTXt) /* Check compression byte */
+ {
+ png_ptr->current_text = NULL;
+ png_free(png_ptr, key);
+ return;
+ }
+
+ text++;
+
+ png_ptr->zstream.next_in = (png_bytep)text;
+ png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size -
+ (text - key));
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+
+ key_size = text - key;
+ text_size = 0;
+ text = NULL;
+ ret = Z_STREAM_END;
+
+ while (png_ptr->zstream.avail_in)
+ {
+ ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
+ if (ret != Z_OK && ret != Z_STREAM_END)
+ {
+ inflateReset(&png_ptr->zstream);
+ png_ptr->zstream.avail_in = 0;
+ png_ptr->current_text = NULL;
+ png_free(png_ptr, key);
+ png_free(png_ptr, text);
+ return;
+ }
+
+ if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END)
+ {
+ if (text == NULL)
+ {
+ text = (png_charp)png_malloc(png_ptr,
+ (png_ptr->zbuf_size
+ - png_ptr->zstream.avail_out + key_size + 1));
+
+ png_memcpy(text + key_size, png_ptr->zbuf,
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+
+ png_memcpy(text, key, key_size);
+
+ text_size = key_size + png_ptr->zbuf_size -
+ png_ptr->zstream.avail_out;
+
+ *(text + text_size) = '\0';
+ }
+
+ else
+ {
+ png_charp tmp;
+
+ tmp = text;
+ text = (png_charp)png_malloc(png_ptr, text_size +
+ (png_ptr->zbuf_size
+ - png_ptr->zstream.avail_out + 1));
+
+ png_memcpy(text, tmp, text_size);
+ png_free(png_ptr, tmp);
+
+ png_memcpy(text + text_size, png_ptr->zbuf,
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+
+ text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
+ *(text + text_size) = '\0';
+ }
+
+ if (ret != Z_STREAM_END)
+ {
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ }
+ }
+ else
+ {
+ break;
+ }
+
+ if (ret == Z_STREAM_END)
+ break;
+ }
+
+ inflateReset(&png_ptr->zstream);
+ png_ptr->zstream.avail_in = 0;
+
+ if (ret != Z_STREAM_END)
+ {
+ png_ptr->current_text = NULL;
+ png_free(png_ptr, key);
+ png_free(png_ptr, text);
+ return;
+ }
+
+ png_ptr->current_text = NULL;
+ png_free(png_ptr, key);
+ key = text;
+ text += key_size;
+
+ text_ptr = (png_textp)png_malloc(png_ptr,
+ png_sizeof(png_text));
+ text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
+ text_ptr->key = key;
+ text_ptr->itxt_length = 0;
+ text_ptr->lang = NULL;
+ text_ptr->lang_key = NULL;
+ text_ptr->text = text;
+
+ ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+
+ png_free(png_ptr, key);
+ png_free(png_ptr, text_ptr);
+
+ if (ret)
+ png_warning(png_ptr, "Insufficient memory to store text chunk");
+ }
+}
+#endif
+
+#ifdef PNG_READ_iTXt_SUPPORTED
+void /* PRIVATE */
+png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
+ length)
+{
+ if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
+ {
+ PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
+ png_error(png_ptr, "Out of place iTXt");
+ /*NOT REACHED*/
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ png_ptr->skip_length = 0; /* This may not be necessary */
+
+ if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
+ {
+ png_warning(png_ptr, "iTXt chunk too large to fit in memory");
+ png_ptr->skip_length = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ png_ptr->current_text = (png_charp)png_malloc(png_ptr,
+ (png_size_t)(length + 1));
+ png_ptr->current_text[length] = '\0';
+ png_ptr->current_text_ptr = png_ptr->current_text;
+ png_ptr->current_text_size = (png_size_t)length;
+ png_ptr->current_text_left = (png_size_t)length;
+ png_ptr->process_mode = PNG_READ_iTXt_MODE;
+}
+
+void /* PRIVATE */
+png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
+{
+
+ if (png_ptr->buffer_size && png_ptr->current_text_left)
+ {
+ png_size_t text_size;
+
+ if (png_ptr->buffer_size < png_ptr->current_text_left)
+ text_size = png_ptr->buffer_size;
+
+ else
+ text_size = png_ptr->current_text_left;
+
+ png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
+ png_ptr->current_text_left -= text_size;
+ png_ptr->current_text_ptr += text_size;
+ }
+
+ if (!(png_ptr->current_text_left))
+ {
+ png_textp text_ptr;
+ png_charp key;
+ int comp_flag;
+ png_charp lang;
+ png_charp lang_key;
+ png_charp text;
+ int ret;
+
+ if (png_ptr->buffer_size < 4)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_crc_finish(png_ptr);
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (png_ptr->skip_length)
+ return;
+#endif
+
+ key = png_ptr->current_text;
+
+ for (lang = key; *lang; lang++)
+ /* Empty loop */ ;
+
+ if (lang < key + png_ptr->current_text_size - 3)
+ lang++;
+
+ comp_flag = *lang++;
+ lang++; /* Skip comp_type, always zero */
+
+ for (lang_key = lang; *lang_key; lang_key++)
+ /* Empty loop */ ;
+
+ lang_key++; /* Skip NUL separator */
+
+ text=lang_key;
+
+ if (lang_key < key + png_ptr->current_text_size - 1)
+ {
+ for (; *text; text++)
+ /* Empty loop */ ;
+ }
+
+ if (text < key + png_ptr->current_text_size)
+ text++;
+
+ text_ptr = (png_textp)png_malloc(png_ptr,
+ png_sizeof(png_text));
+
+ text_ptr->compression = comp_flag + 2;
+ text_ptr->key = key;
+ text_ptr->lang = lang;
+ text_ptr->lang_key = lang_key;
+ text_ptr->text = text;
+ text_ptr->text_length = 0;
+ text_ptr->itxt_length = png_strlen(text);
+
+ ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+
+ png_ptr->current_text = NULL;
+
+ png_free(png_ptr, text_ptr);
+ if (ret)
+ png_warning(png_ptr, "Insufficient memory to store iTXt chunk");
+ }
+}
+#endif
+
+/* This function is called when we haven't found a handler for this
+ * chunk. If there isn't a problem with the chunk itself (ie a bad chunk
+ * name or a critical chunk), the chunk is (currently) silently ignored.
+ */
+void /* PRIVATE */
+png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
+ length)
+{
+ png_uint_32 skip = 0;
+
+ if (!(png_ptr->chunk_name[0] & 0x20))
+ {
+#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
+ if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ PNG_HANDLE_CHUNK_ALWAYS
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
+ && png_ptr->read_user_chunk_fn == NULL
+#endif
+ )
+#endif
+ png_chunk_error(png_ptr, "unknown critical chunk");
+
+ PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
+ }
+
+#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
+ if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
+ {
+#ifdef PNG_MAX_MALLOC_64K
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "unknown chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+ png_memcpy((png_charp)png_ptr->unknown_chunk.name,
+ (png_charp)png_ptr->chunk_name,
+ png_sizeof(png_ptr->unknown_chunk.name));
+ png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name) - 1]
+ = '\0';
+
+ png_ptr->unknown_chunk.size = (png_size_t)length;
+
+ if (length == 0)
+ png_ptr->unknown_chunk.data = NULL;
+
+ else
+ {
+ png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
+ (png_size_t)length);
+ png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
+ }
+
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
+ if (png_ptr->read_user_chunk_fn != NULL)
+ {
+ /* Callback to user unknown chunk handler */
+ int ret;
+ ret = (*(png_ptr->read_user_chunk_fn))
+ (png_ptr, &png_ptr->unknown_chunk);
+
+ if (ret < 0)
+ png_chunk_error(png_ptr, "error in user chunk");
+
+ if (ret == 0)
+ {
+ if (!(png_ptr->chunk_name[0] & 0x20))
+ if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ PNG_HANDLE_CHUNK_ALWAYS)
+ png_chunk_error(png_ptr, "unknown critical chunk");
+ png_set_unknown_chunks(png_ptr, info_ptr,
+ &png_ptr->unknown_chunk, 1);
+ }
+ }
+
+ else
+#endif
+ png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
+ png_free(png_ptr, png_ptr->unknown_chunk.data);
+ png_ptr->unknown_chunk.data = NULL;
+ }
+
+ else
+#endif
+ skip=length;
+ png_push_crc_skip(png_ptr, skip);
+}
+
+void /* PRIVATE */
+png_push_have_info(png_structp png_ptr, png_infop info_ptr)
+{
+ if (png_ptr->info_fn != NULL)
+ (*(png_ptr->info_fn))(png_ptr, info_ptr);
+}
+
+void /* PRIVATE */
+png_push_have_end(png_structp png_ptr, png_infop info_ptr)
+{
+ if (png_ptr->end_fn != NULL)
+ (*(png_ptr->end_fn))(png_ptr, info_ptr);
+}
+
+void /* PRIVATE */
+png_push_have_row(png_structp png_ptr, png_bytep row)
+{
+ if (png_ptr->row_fn != NULL)
+ (*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number,
+ (int)png_ptr->pass);
+}
+
+void PNGAPI
+png_progressive_combine_row (png_structp png_ptr, png_bytep old_row,
+ png_const_bytep new_row)
+{
+ PNG_CONST int FARDATA png_pass_dsp_mask[7] =
+ {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
+
+ if (png_ptr == NULL)
+ return;
+
+ if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */
+ png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
+}
+
+void PNGAPI
+png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
+ png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
+ png_progressive_end_ptr end_fn)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->info_fn = info_fn;
+ png_ptr->row_fn = row_fn;
+ png_ptr->end_fn = end_fn;
+
+ png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer);
+}
+
+png_voidp PNGAPI
+png_get_progressive_ptr(png_const_structp png_ptr)
+{
+ if (png_ptr == NULL)
+ return (NULL);
+
+ return png_ptr->io_ptr;
+}
+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
--- /dev/null
+
+/* pngpriv.h - private declarations for use inside libpng
+ *
+ * For conditions of distribution and use, see copyright notice in png.h
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+/* The symbols declared in this file (including the functions declared
+ * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public
+ * interface, and are not recommended for use by regular applications.
+ * Some of them may become public in the future; others may stay private,
+ * change in an incompatible way, or even disappear.
+ * Although the libpng users are not forbidden to include this header,
+ * they should be well aware of the issues that may arise from doing so.
+ */
+
+#ifndef PNGPRIV_H
+#define PNGPRIV_H
+
+/* This is required for the definition of abort(), used as a last ditch
+ * error handler when all else fails.
+ */
+#include <stdlib.h>
+
+#define PNGLIB_BUILD
+#ifdef PNG_USER_CONFIG
+# include "pngusr.h"
+ /* These should have been defined in pngusr.h */
+# ifndef PNG_USER_PRIVATEBUILD
+# define PNG_USER_PRIVATEBUILD "Custom libpng build"
+# endif
+# ifndef PNG_USER_DLLFNAME_POSTFIX
+# define PNG_USER_DLLFNAME_POSTFIX "Cb"
+# endif
+#endif
+#include "png.h"
+#include "pnginfo.h"
+#include "pngstruct.h"
+
+/* This is used for 16 bit gamma tables - only the top level pointers are const,
+ * this could be changed:
+ */
+typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
+
+/* Added at libpng-1.2.9 */
+/* Moved to pngpriv.h at libpng-1.5.0 */
+
+/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"
+ * script. We may need it here to get the correct configuration on things
+ * like limits.
+ */
+#ifdef PNG_CONFIGURE_LIBPNG
+# ifdef HAVE_CONFIG_H
+# include "config.h"
+# endif
+#endif
+
+/* Moved to pngpriv.h at libpng-1.5.0 */
+/* NOTE: some of these may have been used in external applications as
+ * these definitions were exposed in pngconf.h prior to 1.5.
+ */
+
+/* If you are running on a machine where you cannot allocate more
+ * than 64K of memory at once, uncomment this. While libpng will not
+ * normally need that much memory in a chunk (unless you load up a very
+ * large file), zlib needs to know how big of a chunk it can use, and
+ * libpng thus makes sure to check any memory allocation to verify it
+ * will fit into memory.
+ *
+ * zlib provides 'MAXSEG_64K' which, if defined, indicates the
+ * same limit and pngconf.h (already included) sets the limit
+ * if certain operating systems are detected.
+ */
+#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
+# define PNG_MAX_MALLOC_64K
+#endif
+
+#ifndef PNG_UNUSED
+/* Unused formal parameter warnings are silenced using the following macro
+ * which is expected to have no bad effects on performance (optimizing
+ * compilers will probably remove it entirely). Note that if you replace
+ * it with something other than whitespace, you must include the terminating
+ * semicolon.
+ */
+# define PNG_UNUSED(param) (void)param;
+#endif
+
+/* Just a little check that someone hasn't tried to define something
+ * contradictory.
+ */
+#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
+# undef PNG_ZBUF_SIZE
+# define PNG_ZBUF_SIZE 65536L
+#endif
+
+/* If warnings or errors are turned off the code is disabled
+ * or redirected here.
+ */
+#ifndef PNG_WARNINGS_SUPPORTED
+# define png_warning(s1,s2) ((void)0)
+# define png_chunk_warning(s1,s2) ((void)0)
+#endif
+#ifndef PNG_ERROR_TEXT_SUPPORTED
+# define png_error(s1,s2) png_err(s1)
+# define png_chunk_error(s1,s2) png_err(s1)
+# define png_fixed_error(s1,s2) png_err(s1)
+#endif
+
+#ifndef PNG_EXTERN
+/* The functions exported by PNG_EXTERN are internal functions, which
+ * aren't usually used outside the library (as far as I know), so it is
+ * debatable if they should be exported at all. In the future, when it
+ * is possible to have run-time registry of chunk-handling functions,
+ * some of these might be made available again.
+# define PNG_EXTERN extern
+ */
+# define PNG_EXTERN
+#endif
+
+/* Some fixed point APIs are still required even if not exported because
+ * they get used by the corresponding floating point APIs. This magic
+ * deals with this:
+ */
+#ifdef PNG_FIXED_POINT_SUPPORTED
+# define PNGFAPI PNGAPI
+#else
+# define PNGFAPI /* PRIVATE */
+#endif
+
+/* Other defines specific to compilers can go here. Try to keep
+ * them inside an appropriate ifdef/endif pair for portability.
+ */
+#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\
+ defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
+ /* png.c requires the following ANSI-C constants if the conversion of
+ * floating point to ASCII is implemented therein:
+ *
+ * DBL_DIG Maximum number of decimal digits (can be set to any constant)
+ * DBL_MIN Smallest normalized fp number (can be set to an arbitrary value)
+ * DBL_MAX Maximum floating point number (can be set to an arbitrary value)
+ */
+# include <float.h>
+
+# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
+ defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
+ /* We need to check that <math.h> hasn't already been included earlier
+ * as it seems it doesn't agree with <fp.h>, yet we should really use
+ * <fp.h> if possible.
+ */
+# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
+# include <fp.h>
+# endif
+# else
+# include <math.h>
+# endif
+# if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
+ /* Amiga SAS/C: We must include builtin FPU functions when compiling using
+ * MATH=68881
+ */
+# include <m68881.h>
+# endif
+#endif
+
+/* This provides the non-ANSI (far) memory allocation routines. */
+#if defined(__TURBOC__) && defined(__MSDOS__)
+# include <mem.h>
+# include <alloc.h>
+#endif
+
+#if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \
+ defined(_WIN32) || defined(__WIN32__)
+# include <windows.h> /* defines _WINDOWS_ macro */
+#endif
+
+/* Moved here around 1.5.0beta36 from pngconf.h */
+/* Users may want to use these so they are not private. Any library
+ * functions that are passed far data must be model-independent.
+ */
+
+/* Memory model/platform independent fns */
+#ifndef PNG_ABORT
+# ifdef _WINDOWS_
+# define PNG_ABORT() ExitProcess(0)
+# else
+# define PNG_ABORT() abort()
+# endif
+#endif
+
+#ifdef USE_FAR_KEYWORD
+/* Use this to make far-to-near assignments */
+# define CHECK 1
+# define NOCHECK 0
+# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
+# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
+# define png_strcpy _fstrcpy
+# define png_strncpy _fstrncpy /* Added to v 1.2.6 */
+# define png_strlen _fstrlen
+# define png_memcmp _fmemcmp /* SJT: added */
+# define png_memcpy _fmemcpy
+# define png_memset _fmemset
+# define png_sprintf sprintf
+#else
+# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */
+# define CVT_PTR(ptr) (ptr)
+# define CVT_PTR_NOCHECK(ptr) (ptr)
+# define png_strcpy lstrcpyA
+# define png_strncpy lstrcpynA
+# define png_strlen lstrlenA
+# define png_memcmp memcmp
+# define png_memcpy CopyMemory
+# define png_memset memset
+# define png_sprintf wsprintfA
+# else
+# define CVT_PTR(ptr) (ptr)
+# define CVT_PTR_NOCHECK(ptr) (ptr)
+# define png_strcpy strcpy
+# define png_strncpy strncpy /* Added to v 1.2.6 */
+# define png_strlen strlen
+# define png_memcmp memcmp /* SJT: added */
+# define png_memcpy memcpy
+# define png_memset memset
+# define png_sprintf sprintf
+# endif
+#endif
+/* End of memory model/platform independent support */
+
+#ifndef PNG_NO_SNPRINTF
+# ifdef _MSC_VER
+# define png_snprintf _snprintf /* Added to v 1.2.19 */
+# define png_snprintf2 _snprintf
+# define png_snprintf6 _snprintf
+# else
+# define png_snprintf snprintf /* Added to v 1.2.19 */
+# define png_snprintf2 snprintf
+# define png_snprintf6 snprintf
+# endif
+#else
+ /* You don't have or don't want to use snprintf(). Caution: Using
+ * sprintf instead of snprintf exposes your application to accidental
+ * or malevolent buffer overflows. If you don't have snprintf()
+ * as a general rule you should provide one (you can get one from
+ * Portable OpenSSH).
+ */
+# define png_snprintf(s1,n,fmt,x1) png_sprintf(s1,fmt,x1)
+# define png_snprintf2(s1,n,fmt,x1,x2) png_sprintf(s1,fmt,x1,x2)
+# define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
+ png_sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
+#endif
+/* End of 1.5.0beta36 move from pngconf.h */
+
+/* CONSTANTS and UTILITY MACROS
+ * These are used internally by libpng and not exposed in the API
+ */
+
+/* Various modes of operation. Note that after an init, mode is set to
+ * zero automatically when the structure is created.
+ */
+#define PNG_HAVE_IHDR 0x01
+#define PNG_HAVE_PLTE 0x02
+#define PNG_HAVE_IDAT 0x04
+#define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */
+#define PNG_HAVE_IEND 0x10
+#define PNG_HAVE_gAMA 0x20
+#define PNG_HAVE_cHRM 0x40
+#define PNG_HAVE_sRGB 0x80
+#define PNG_HAVE_CHUNK_HEADER 0x100
+#define PNG_WROTE_tIME 0x200
+#define PNG_WROTE_INFO_BEFORE_PLTE 0x400
+#define PNG_BACKGROUND_IS_GRAY 0x800
+#define PNG_HAVE_PNG_SIGNATURE 0x1000
+#define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */
+
+/* Flags for the transformations the PNG library does on the image data */
+#define PNG_BGR 0x0001
+#define PNG_INTERLACE 0x0002
+#define PNG_PACK 0x0004
+#define PNG_SHIFT 0x0008
+#define PNG_SWAP_BYTES 0x0010
+#define PNG_INVERT_MONO 0x0020
+#define PNG_QUANTIZE 0x0040
+#define PNG_BACKGROUND 0x0080
+#define PNG_BACKGROUND_EXPAND 0x0100
+#define PNG_EXPAND_16 0x0200 /* Added to libpng 1.5.2 */
+#define PNG_16_TO_8 0x0400
+#define PNG_RGBA 0x0800
+#define PNG_EXPAND 0x1000
+#define PNG_GAMMA 0x2000
+#define PNG_GRAY_TO_RGB 0x4000
+#define PNG_FILLER 0x8000L
+#define PNG_PACKSWAP 0x10000L
+#define PNG_SWAP_ALPHA 0x20000L
+#define PNG_STRIP_ALPHA 0x40000L
+#define PNG_INVERT_ALPHA 0x80000L
+#define PNG_USER_TRANSFORM 0x100000L
+#define PNG_RGB_TO_GRAY_ERR 0x200000L
+#define PNG_RGB_TO_GRAY_WARN 0x400000L
+#define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */
+ /* 0x800000L Unused */
+#define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */
+#define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */
+ /* 0x4000000L unused */
+ /* 0x8000000L unused */
+ /* 0x10000000L unused */
+ /* 0x20000000L unused */
+ /* 0x40000000L unused */
+
+/* Flags for png_create_struct */
+#define PNG_STRUCT_PNG 0x0001
+#define PNG_STRUCT_INFO 0x0002
+
+/* Scaling factor for filter heuristic weighting calculations */
+#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT))
+#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT))
+
+/* Flags for the png_ptr->flags rather than declaring a byte for each one */
+#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001
+#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002
+#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004
+#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008
+#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010
+#define PNG_FLAG_ZLIB_FINISHED 0x0020
+#define PNG_FLAG_ROW_INIT 0x0040
+#define PNG_FLAG_FILLER_AFTER 0x0080
+#define PNG_FLAG_CRC_ANCILLARY_USE 0x0100
+#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200
+#define PNG_FLAG_CRC_CRITICAL_USE 0x0400
+#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800
+ /* 0x1000 unused */
+ /* 0x2000 unused */
+ /* 0x4000 unused */
+#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L
+#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L
+#define PNG_FLAG_LIBRARY_MISMATCH 0x20000L
+#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L
+#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L
+#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L
+ /* 0x200000L unused */
+ /* 0x400000L unused */
+#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000L /* Added to libpng-1.4.0 */
+ /* 0x1000000L unused */
+ /* 0x2000000L unused */
+ /* 0x4000000L unused */
+ /* 0x8000000L unused */
+ /* 0x10000000L unused */
+ /* 0x20000000L unused */
+ /* 0x40000000L unused */
+
+#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \
+ PNG_FLAG_CRC_ANCILLARY_NOWARN)
+
+#define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \
+ PNG_FLAG_CRC_CRITICAL_IGNORE)
+
+#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \
+ PNG_FLAG_CRC_CRITICAL_MASK)
+
+/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib
+ * can handle at once. This type need be no larger than 16 bits (so maximum of
+ * 65535), this define allows us to discover how big it is, but limited by the
+ * maximuum for png_size_t. The value can be overriden in a library build
+ * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably
+ * lower value (e.g. 255 works). A lower value may help memory usage (slightly)
+ * and may even improve performance on some systems (and degrade it on others.)
+ */
+#ifndef ZLIB_IO_MAX
+# define ZLIB_IO_MAX ((uInt)-1)
+#endif
+
+/* Save typing and make code easier to understand */
+
+#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \
+ abs((int)((c1).green) - (int)((c2).green)) + \
+ abs((int)((c1).blue) - (int)((c2).blue)))
+
+/* Added to libpng-1.2.6 JB */
+#define PNG_ROWBYTES(pixel_bits, width) \
+ ((pixel_bits) >= 8 ? \
+ ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \
+ (( ((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3) )
+
+/* PNG_OUT_OF_RANGE returns true if value is outside the range
+ * ideal-delta..ideal+delta. Each argument is evaluated twice.
+ * "ideal" and "delta" should be constants, normally simple
+ * integers, "value" a variable. Added to libpng-1.2.6 JB
+ */
+#define PNG_OUT_OF_RANGE(value, ideal, delta) \
+ ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) )
+
+/* Conversions between fixed and floating point, only defined if
+ * required (to make sure the code doesn't accidentally use float
+ * when it is supposedly disabled.)
+ */
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+/* The floating point conversion can't overflow, though it can and
+ * does lose accuracy relative to the original fixed point value.
+ * In practice this doesn't matter because png_fixed_point only
+ * stores numbers with very low precision. The png_ptr and s
+ * arguments are unused by default but are there in case error
+ * checking becomes a requirement.
+ */
+#define png_float(png_ptr, fixed, s) (.00001 * (fixed))
+
+/* The fixed point conversion performs range checking and evaluates
+ * its argument multiple times, so must be used with care. The
+ * range checking uses the PNG specification values for a signed
+ * 32 bit fixed point value except that the values are deliberately
+ * rounded-to-zero to an integral value - 21474 (21474.83 is roughly
+ * (2^31-1) * 100000). 's' is a string that describes the value being
+ * converted.
+ *
+ * NOTE: this macro will raise a png_error if the range check fails,
+ * therefore it is normally only appropriate to use this on values
+ * that come from API calls or other sources where an out of range
+ * error indicates a programming error, not a data error!
+ *
+ * NOTE: by default this is off - the macro is not used - because the
+ * function call saves a lot of code.
+ */
+#ifdef PNG_FIXED_POINT_MACRO_SUPPORTED
+#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\
+ ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0))
+#else
+PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
+ png_const_charp text));
+#endif
+#endif
+
+/* Constant strings for known chunk types. If you need to add a chunk,
+ * define the name here, and add an invocation of the macro wherever it's
+ * needed.
+ */
+#define PNG_IHDR PNG_CONST png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'}
+#define PNG_IDAT PNG_CONST png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'}
+#define PNG_IEND PNG_CONST png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'}
+#define PNG_PLTE PNG_CONST png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'}
+#define PNG_bKGD PNG_CONST png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'}
+#define PNG_cHRM PNG_CONST png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'}
+#define PNG_gAMA PNG_CONST png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'}
+#define PNG_hIST PNG_CONST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'}
+#define PNG_iCCP PNG_CONST png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'}
+#define PNG_iTXt PNG_CONST png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'}
+#define PNG_oFFs PNG_CONST png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'}
+#define PNG_pCAL PNG_CONST png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'}
+#define PNG_sCAL PNG_CONST png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'}
+#define PNG_pHYs PNG_CONST png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'}
+#define PNG_sBIT PNG_CONST png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'}
+#define PNG_sPLT PNG_CONST png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'}
+#define PNG_sRGB PNG_CONST png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'}
+#define PNG_sTER PNG_CONST png_byte png_sTER[5] = {115, 84, 69, 82, '\0'}
+#define PNG_tEXt PNG_CONST png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'}
+#define PNG_tIME PNG_CONST png_byte png_tIME[5] = {116, 73, 77, 69, '\0'}
+#define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'}
+#define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'}
+
+
+/* Inhibit C++ name-mangling for libpng functions but not for system calls. */
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* These functions are used internally in the code. They generally
+ * shouldn't be used unless you are writing code to add or replace some
+ * functionality in libpng. More information about most functions can
+ * be found in the files where the functions are located.
+ */
+
+/* Allocate memory for an internal libpng struct */
+PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)),
+ PNG_ALLOCATED);
+
+/* Free memory from internal libpng struct */
+PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr));
+
+PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2,
+ PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)),
+ PNG_ALLOCATED);
+PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr,
+ png_free_ptr free_fn, png_voidp mem_ptr));
+
+/* Free any memory that info_ptr points to and reset struct. */
+PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+
+/* Function to allocate memory for zlib. PNGAPI is disallowed. */
+PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items,
+ uInt size)),PNG_ALLOCATED);
+
+/* Function to free memory for zlib. PNGAPI is disallowed. */
+PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr));
+
+/* Next four functions are used internally as callbacks. PNGCBAPI is required
+ * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to
+ * PNGCBAPI at 1.5.0
+ */
+
+PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr,
+ png_bytep data, png_size_t length));
+
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr,
+ png_bytep buffer, png_size_t length));
+#endif
+
+PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr,
+ png_bytep data, png_size_t length));
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+# ifdef PNG_STDIO_SUPPORTED
+PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr));
+# endif
+#endif
+
+/* Reset the CRC variable */
+PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr));
+
+/* Write the "data" buffer to whatever output you are using */
+PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr,
+ png_const_bytep data, png_size_t length));
+
+/* Read and check the PNG file signature */
+PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr));
+
+/* Read the chunk header (length + type name) */
+PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr));
+
+/* Read data from whatever input you are using into the "data" buffer */
+PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data,
+ png_size_t length));
+
+/* Read bytes into buf, and update png_ptr->crc */
+PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf,
+ png_size_t length));
+
+/* Decompress data in a chunk that uses compression */
+#if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \
+ defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
+PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr,
+ int comp_type, png_size_t chunklength, png_size_t prefix_length,
+ png_size_t *data_length));
+#endif
+
+/* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */
+PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip));
+
+/* Read the CRC from the file and compare it to the libpng calculated CRC */
+PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr));
+
+/* Calculate the CRC over a section of data. Note that we are only
+ * passing a maximum of 64K on systems that have this as a memory limit,
+ * since this is the maximum buffer size we can specify.
+ */
+PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr,
+ png_const_bytep ptr, png_size_t length));
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+PNG_EXTERN void png_flush PNGARG((png_structp png_ptr));
+#endif
+
+/* Write various chunks */
+
+/* Write the IHDR chunk, and update the png_struct with the necessary
+ * information.
+ */
+PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width,
+ png_uint_32 height,
+ int bit_depth, int color_type, int compression_method, int filter_method,
+ int interlace_method));
+
+PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr,
+ png_const_colorp palette, png_uint_32 num_pal));
+
+PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data,
+ png_size_t length));
+
+PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr));
+
+#ifdef PNG_WRITE_gAMA_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma));
+# endif
+# ifdef PNG_FIXED_POINT_SUPPORTED
+PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr,
+ png_fixed_point file_gamma));
+# endif
+#endif
+
+#ifdef PNG_WRITE_sBIT_SUPPORTED
+PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr,
+ png_const_color_8p sbit, int color_type));
+#endif
+
+#ifdef PNG_WRITE_cHRM_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr,
+ double white_x, double white_y,
+ double red_x, double red_y, double green_x, double green_y,
+ double blue_x, double blue_y));
+# endif
+PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr,
+ png_fixed_point int_white_x, png_fixed_point int_white_y,
+ png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
+ int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
+ png_fixed_point int_blue_y));
+#endif
+
+#ifdef PNG_WRITE_sRGB_SUPPORTED
+PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr,
+ int intent));
+#endif
+
+#ifdef PNG_WRITE_iCCP_SUPPORTED
+PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr,
+ png_const_charp name, int compression_type,
+ png_const_charp profile, int proflen));
+ /* Note to maintainer: profile should be png_bytep */
+#endif
+
+#ifdef PNG_WRITE_sPLT_SUPPORTED
+PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr,
+ png_const_sPLT_tp palette));
+#endif
+
+#ifdef PNG_WRITE_tRNS_SUPPORTED
+PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr,
+ png_const_bytep trans, png_const_color_16p values, int number,
+ int color_type));
+#endif
+
+#ifdef PNG_WRITE_bKGD_SUPPORTED
+PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr,
+ png_const_color_16p values, int color_type));
+#endif
+
+#ifdef PNG_WRITE_hIST_SUPPORTED
+PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr,
+ png_const_uint_16p hist, int num_hist));
+#endif
+
+#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
+ defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
+PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr,
+ png_const_charp key, png_charpp new_key));
+#endif
+
+#ifdef PNG_WRITE_tEXt_SUPPORTED
+PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key,
+ png_const_charp text, png_size_t text_len));
+#endif
+
+#ifdef PNG_WRITE_zTXt_SUPPORTED
+PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key,
+ png_const_charp text, png_size_t text_len, int compression));
+#endif
+
+#ifdef PNG_WRITE_iTXt_SUPPORTED
+PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr,
+ int compression, png_const_charp key, png_const_charp lang,
+ png_const_charp lang_key, png_const_charp text));
+#endif
+
+#ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */
+PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_const_textp text_ptr, int num_text));
+#endif
+
+#ifdef PNG_WRITE_oFFs_SUPPORTED
+PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr,
+ png_int_32 x_offset, png_int_32 y_offset, int unit_type));
+#endif
+
+#ifdef PNG_WRITE_pCAL_SUPPORTED
+PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose,
+ png_int_32 X0, png_int_32 X1, int type, int nparams,
+ png_const_charp units, png_charpp params));
+#endif
+
+#ifdef PNG_WRITE_pHYs_SUPPORTED
+PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr,
+ png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit,
+ int unit_type));
+#endif
+
+#ifdef PNG_WRITE_tIME_SUPPORTED
+PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr,
+ png_const_timep mod_time));
+#endif
+
+#ifdef PNG_WRITE_sCAL_SUPPORTED
+PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr,
+ int unit, png_const_charp width, png_const_charp height));
+#endif
+
+/* Called when finished processing a row of data */
+PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr));
+
+/* Internal use only. Called before first row of data */
+PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr));
+
+/* Combine a row of data, dealing with alpha, etc. if requested */
+PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row,
+ int mask));
+
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+/* Expand an interlaced row */
+/* OLD pre-1.0.9 interface:
+PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info,
+ png_bytep row, int pass, png_uint_32 transformations));
+ */
+PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr));
+#endif
+
+/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+/* Grab pixels out of a row for an interlaced pass */
+PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info,
+ png_bytep row, int pass));
+#endif
+
+/* Unfilter a row */
+PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr,
+ png_row_infop row_info, png_bytep row, png_const_bytep prev_row,
+ int filter));
+
+/* Choose the best filter to use and filter the row data */
+PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr,
+ png_row_infop row_info));
+
+/* Write out the filtered row. */
+PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr,
+ png_bytep filtered_row));
+/* Finish a row while reading, dealing with interlacing passes, etc. */
+PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr));
+
+/* Initialize the row buffers, etc. */
+PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr));
+/* Optional call to update the users info structure */
+PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+
+/* These are the functions that do the transformations */
+#ifdef PNG_READ_FILLER_SUPPORTED
+PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info,
+ png_bytep row, png_uint_32 filler, png_uint_32 flags));
+#endif
+
+#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
+PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
+PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
+PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
+PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
+ defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
+PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info,
+ png_bytep row, int at_start));
+#endif
+
+#ifdef PNG_16BIT_SUPPORTED
+#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
+PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+#endif
+
+#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \
+ defined(PNG_WRITE_PACKSWAP_SUPPORTED)
+PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr,
+ png_row_infop row_info, png_bytep row));
+#endif
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_READ_PACK_SUPPORTED
+PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_READ_SHIFT_SUPPORTED
+PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_8p sig_bits));
+#endif
+
+#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
+PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep palette_lookup,
+ png_const_bytep quantize_lookup));
+
+# ifdef PNG_CORRECT_PALETTE_SUPPORTED
+PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr,
+ png_colorp palette, int num_palette));
+# endif
+#endif
+
+#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
+PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+#ifdef PNG_WRITE_PACK_SUPPORTED
+PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info,
+ png_bytep row, png_uint_32 bit_depth));
+#endif
+
+#ifdef PNG_WRITE_SHIFT_SUPPORTED
+PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_8p bit_depth));
+#endif
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+# ifdef PNG_READ_GAMMA_SUPPORTED
+PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_16p trans_color,
+ png_const_color_16p background, png_const_color_16p background_1,
+ png_const_bytep gamma_table, png_const_bytep gamma_from_1,
+ png_const_bytep gamma_to_1, png_const_uint_16pp gamma_16,
+ png_const_uint_16pp gamma_16_from_1, png_const_uint_16pp gamma_16_to_1,
+ int gamma_shift));
+# else
+PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_16p trans_color,
+ png_const_color_16p background));
+# endif
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep gamma_table,
+ png_const_uint_16pp gamma_16_table, int gamma_shift));
+#endif
+
+#ifdef PNG_READ_EXPAND_SUPPORTED
+PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_colorp palette, png_const_bytep trans,
+ int num_trans));
+PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_16p trans_color));
+#endif
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+/* The following decodes the appropriate chunks, and does error correction,
+ * then calls the appropriate callback for the chunk if it is valid.
+ */
+
+/* Decode the IHDR chunk */
+PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+
+#ifdef PNG_READ_bKGD_SUPPORTED
+PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_cHRM_SUPPORTED
+PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_gAMA_SUPPORTED
+PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_hIST_SUPPORTED
+PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_iCCP_SUPPORTED
+PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif /* PNG_READ_iCCP_SUPPORTED */
+
+#ifdef PNG_READ_iTXt_SUPPORTED
+PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_oFFs_SUPPORTED
+PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_pCAL_SUPPORTED
+PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_pHYs_SUPPORTED
+PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_sBIT_SUPPORTED
+PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_sCAL_SUPPORTED
+PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_sPLT_SUPPORTED
+PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif /* PNG_READ_sPLT_SUPPORTED */
+
+#ifdef PNG_READ_sRGB_SUPPORTED
+PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_tEXt_SUPPORTED
+PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_tIME_SUPPORTED
+PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_tRNS_SUPPORTED
+PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+#ifdef PNG_READ_zTXt_SUPPORTED
+PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
+PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_uint_32 length));
+
+PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr,
+ png_const_bytep chunk_name));
+
+/* Handle the transformations for reading and writing */
+PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr));
+PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr));
+
+PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr));
+
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr));
+PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr,
+ png_uint_32 length));
+PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr));
+PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr));
+PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr,
+ png_bytep buffer, png_size_t buffer_length));
+PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr));
+PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr,
+ png_bytep buffer, png_size_t buffer_length));
+PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr));
+PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_uint_32 length));
+PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row));
+PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr));
+# ifdef PNG_READ_tEXt_SUPPORTED
+PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_uint_32 length));
+PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+# endif
+# ifdef PNG_READ_zTXt_SUPPORTED
+PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_uint_32 length));
+PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+# endif
+# ifdef PNG_READ_iTXt_SUPPORTED
+PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_uint_32 length));
+PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+# endif
+
+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info,
+ png_bytep row));
+PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
+
+/* Added at libpng version 1.4.0 */
+#ifdef PNG_CHECK_cHRM_SUPPORTED
+PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr,
+ png_fixed_point int_white_x, png_fixed_point int_white_y,
+ png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
+ int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
+ png_fixed_point int_blue_y));
+#endif
+
+#ifdef PNG_CHECK_cHRM_SUPPORTED
+/* Added at libpng version 1.2.34 and 1.4.0 */
+/* Currently only used by png_check_cHRM_fixed */
+PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2,
+ unsigned long *hi_product, unsigned long *lo_product));
+#endif
+
+/* Added at libpng version 1.4.0 */
+PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr,
+ png_uint_32 width, png_uint_32 height, int bit_depth,
+ int color_type, int interlace_type, int compression_type,
+ int filter_type));
+
+/* Free all memory used by the read (old method - NOT DLL EXPORTED) */
+PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_infop end_info_ptr));
+
+/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */
+PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr));
+
+#ifdef USE_FAR_KEYWORD /* memory model conversion function */
+PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr,
+ int check));
+#endif /* USE_FAR_KEYWORD */
+
+#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
+PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr,
+ png_const_charp name),PNG_NORETURN);
+#endif
+
+/* ASCII to FP interfaces, currently only implemented if sCAL
+ * support is required.
+ */
+#if defined(PNG_READ_sCAL_SUPPORTED)
+/* MAX_DIGITS is actually the maximum number of characters in an sCAL
+ * width or height, derived from the precision (number of significant
+ * digits - a build time settable option) and assumpitions about the
+ * maximum ridiculous exponent.
+ */
+#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/)
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii,
+ png_size_t size, double fp, unsigned int precision));
+#endif /* FLOATING_POINT */
+
+#ifdef PNG_FIXED_POINT_SUPPORTED
+PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr,
+ png_charp ascii, png_size_t size, png_fixed_point fp));
+#endif /* FIXED_POINT */
+#endif /* READ_sCAL */
+
+#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED)
+/* An internal API to validate the format of a floating point number.
+ * The result is the index of the next character. If the number is
+ * not valid it will be the index of a character in the supposed number.
+ *
+ * The format of a number is defined in the PNG extensions specification
+ * and this API is strictly conformant to that spec, not anyone elses!
+ *
+ * The format as a regular expression is:
+ *
+ * [+-]?[0-9]+.?([Ee][+-]?[0-9]+)?
+ *
+ * or:
+ *
+ * [+-]?.[0-9]+(.[0-9]+)?([Ee][+-]?[0-9]+)?
+ *
+ * The complexity is that either integer or fraction must be present and the
+ * fraction is permitted to have no digits only if the integer is present.
+ *
+ * NOTE: The dangling E problem.
+ * There is a PNG valid floating point number in the following:
+ *
+ * PNG floating point numb1.ers are not greedy.
+ *
+ * Working this out requires *TWO* character lookahead (because of the
+ * sign), the parser does not do this - it will fail at the 'r' - this
+ * doesn't matter for PNG sCAL chunk values, but it requires more care
+ * if the value were ever to be embedded in something more complex. Use
+ * ANSI-C strtod if you need the lookahead.
+ */
+/* State table for the parser. */
+#define PNG_FP_INTEGER 0 /* before or in integer */
+#define PNG_FP_FRACTION 1 /* before or in fraction */
+#define PNG_FP_EXPONENT 2 /* before or in exponent */
+#define PNG_FP_STATE 3 /* mask for the above */
+#define PNG_FP_SAW_SIGN 4 /* Saw +/- in current state */
+#define PNG_FP_SAW_DIGIT 8 /* Saw a digit in current state */
+#define PNG_FP_SAW_DOT 16 /* Saw a dot in current state */
+#define PNG_FP_SAW_E 32 /* Saw an E (or e) in current state */
+#define PNG_FP_SAW_ANY 60 /* Saw any of the above 4 */
+#define PNG_FP_WAS_VALID 64 /* Preceding substring is a valid fp number */
+#define PNG_FP_INVALID 128 /* Available for callers as a distinct value */
+
+/* Result codes for the parser (boolean - true meants ok, false means
+ * not ok yet.)
+ */
+#define PNG_FP_MAYBE 0 /* The number may be valid in the future */
+#define PNG_FP_OK 1 /* The number is valid */
+
+/* The actual parser. This can be called repeatedly, it updates
+ * the index into the string and the state variable (which must
+ * be initialzed to 0). It returns a result code, as above. There
+ * is no point calling the parser any more if it fails to advance to
+ * the end of the string - it is stuck on an invalid character (or
+ * terminated by '\0').
+ *
+ * Note that the pointer will consume an E or even an E+ then leave
+ * a 'maybe' state even though a preceding integer.fraction is valid.
+ * The PNG_FP_WAS_VALID flag indicates that a preceding substring was
+ * a valid number. It's possible to recover from this by calling
+ * the parser again (from the start, with state 0) but with a string
+ * that omits the last character (i.e. set the size to the index of
+ * the problem character.) This has not been tested within libpng.
+ */
+PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string,
+ png_size_t size, int *statep, png_size_tp whereami));
+
+/* This is the same but it checks a complete string and returns true
+ * only if it just contains a floating point number.
+ */
+PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string,
+ png_size_t size));
+#endif /* pCAL || sCAL */
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) ||\
+ defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
+/* Added at libpng version 1.5.0 */
+/* This is a utility to provide a*times/div (rounded) and indicate
+ * if there is an overflow. The result is a boolean - false (0)
+ * for overflow, true (1) if no overflow, in which case *res
+ * holds the result.
+ */
+PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a,
+ png_int_32 multiplied_by, png_int_32 divided_by));
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
+/* Same deal, but issue a warning on overflow and return 0. */
+PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr,
+ png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by));
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+/* Calculate a reciprocal - used for gamma values. This returns
+ * 0 if the argument is 0 in order to maintain an undefined value,
+ * there are no warnings.
+ */
+PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a));
+
+/* The same but gives a reciprocal of the product of two fixed point
+ * values. Accuracy is suitable for gamma calculations but this is
+ * not exact - use png_muldiv for that.
+ */
+PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a,
+ png_fixed_point b));
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+/* Internal fixed point gamma correction. These APIs are called as
+ * required to convert single values - they don't need to be fast,
+ * they are not used when processing image pixel values.
+ *
+ * While the input is an 'unsigned' value it must actually be the
+ * correct bit value - 0..255 or 0..65535 as required.
+ */
+PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr,
+ unsigned int value, png_fixed_point gamma_value));
+PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value));
+PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value,
+ png_fixed_point gamma_value));
+PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value,
+ png_fixed_point gamma_value));
+PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
+ int bit_depth));
+#endif
+
+/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
+
+
+#include "pngdebug.h"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PNGPRIV_H */
--- /dev/null
+
+/* pngread.c - read a PNG file
+ *
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * This file contains routines that an application calls directly to
+ * read a PNG file or stream.
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_READ_SUPPORTED
+
+/* Create a PNG structure for reading, and allocate any memory needed. */
+PNG_FUNCTION(png_structp,PNGAPI
+png_create_read_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED)
+{
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn,
+ warn_fn, NULL, NULL, NULL));
+}
+
+/* Alternate create PNG structure for reading, and allocate any memory
+ * needed.
+ */
+PNG_FUNCTION(png_structp,PNGAPI
+png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
+ png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED)
+{
+#endif /* PNG_USER_MEM_SUPPORTED */
+
+#ifdef PNG_SETJMP_SUPPORTED
+ volatile
+#endif
+ png_structp png_ptr;
+ volatile int png_cleanup_needed = 0;
+
+#ifdef PNG_SETJMP_SUPPORTED
+#ifdef USE_FAR_KEYWORD
+ jmp_buf png_jmpbuf;
+#endif
+#endif
+
+ int i;
+
+ png_debug(1, "in png_create_read_struct");
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
+ malloc_fn, mem_ptr);
+#else
+ png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
+#endif
+ if (png_ptr == NULL)
+ return (NULL);
+
+ /* Added at libpng-1.2.6 */
+#ifdef PNG_USER_LIMITS_SUPPORTED
+ png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
+ png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
+
+# ifdef PNG_USER_CHUNK_CACHE_MAX
+ /* Added at libpng-1.2.43 and 1.4.0 */
+ png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX;
+# endif
+
+# ifdef PNG_SET_USER_CHUNK_MALLOC_MAX
+ /* Added at libpng-1.2.43 and 1.4.1 */
+ png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX;
+# endif
+#endif
+
+#ifdef PNG_SETJMP_SUPPORTED
+/* Applications that neglect to set up their own setjmp() and then
+ encounter a png_error() will longjmp here. Since the jmpbuf is
+ then meaningless we abort instead of returning. */
+#ifdef USE_FAR_KEYWORD
+ if (setjmp(png_jmpbuf))
+#else
+ if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */
+#endif
+ PNG_ABORT();
+#ifdef USE_FAR_KEYWORD
+ png_memcpy(png_jmpbuf(png_ptr), png_jmpbuf, png_sizeof(jmp_buf));
+#endif
+#endif /* PNG_SETJMP_SUPPORTED */
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
+#endif
+
+ png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
+
+ if (user_png_ver)
+ {
+ i = 0;
+
+ do
+ {
+ if (user_png_ver[i] != png_libpng_ver[i])
+ png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
+ } while (png_libpng_ver[i++]);
+ }
+
+ else
+ png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
+
+
+ if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
+ {
+ /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
+ * we must recompile any applications that use any older library version.
+ * For versions after libpng 1.0, we will be compatible, so we need
+ * only check the first digit.
+ */
+ if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
+ (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
+ (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
+ {
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ char msg[80];
+ if (user_png_ver)
+ {
+ png_snprintf2(msg, 80,
+ "Application built with libpng-%.20s"
+ " but running with %.20s",
+ user_png_ver,
+ png_libpng_ver);
+ png_warning(png_ptr, msg);
+ }
+#else
+ png_warning(png_ptr,
+ "Incompatible libpng version in application and library");
+#endif
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+ png_ptr->flags = 0;
+#endif
+
+ png_cleanup_needed = 1;
+ }
+ }
+
+ if (!png_cleanup_needed)
+ {
+ /* Initialize zbuf - compression buffer */
+ png_ptr->zbuf_size = PNG_ZBUF_SIZE;
+ png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size);
+
+ if (png_ptr->zbuf == NULL)
+ png_cleanup_needed = 1;
+ }
+
+ png_ptr->zstream.zalloc = png_zalloc;
+ png_ptr->zstream.zfree = png_zfree;
+ png_ptr->zstream.opaque = (voidpf)png_ptr;
+
+ if (!png_cleanup_needed)
+ {
+ switch (inflateInit(&png_ptr->zstream))
+ {
+ case Z_OK:
+ break; /* Do nothing */
+
+ case Z_MEM_ERROR:
+ png_warning(png_ptr, "zlib memory error");
+ png_cleanup_needed = 1;
+ break;
+
+ case Z_STREAM_ERROR:
+ png_warning(png_ptr, "zlib stream error");
+ png_cleanup_needed = 1;
+ break;
+
+ case Z_VERSION_ERROR:
+ png_warning(png_ptr, "zlib version error");
+ png_cleanup_needed = 1;
+ break;
+
+ default: png_warning(png_ptr, "Unknown zlib error");
+ png_cleanup_needed = 1;
+ }
+ }
+
+ if (png_cleanup_needed)
+ {
+ /* Clean up PNG structure and deallocate any memory. */
+ png_free(png_ptr, png_ptr->zbuf);
+ png_ptr->zbuf = NULL;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)png_ptr,
+ (png_free_ptr)free_fn, (png_voidp)mem_ptr);
+#else
+ png_destroy_struct((png_voidp)png_ptr);
+#endif
+ return (NULL);
+ }
+
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+
+ png_set_read_fn(png_ptr, NULL, NULL);
+
+
+ return (png_ptr);
+}
+
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read the information before the actual image data. This has been
+ * changed in v0.90 to allow reading a file that already has the magic
+ * bytes read from the stream. You can tell libpng how many bytes have
+ * been read from the beginning of the stream (up to the maximum of 8)
+ * via png_set_sig_bytes(), and we will only check the remaining bytes
+ * here. The application can then have access to the signature bytes we
+ * read if it is determined that this isn't a valid PNG file.
+ */
+void PNGAPI
+png_read_info(png_structp png_ptr, png_infop info_ptr)
+{
+ png_debug(1, "in png_read_info");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ /* Read and check the PNG file signature. */
+ png_read_sig(png_ptr, info_ptr);
+
+ for (;;)
+ {
+ PNG_IHDR;
+ PNG_IDAT;
+ PNG_IEND;
+ PNG_PLTE;
+#ifdef PNG_READ_bKGD_SUPPORTED
+ PNG_bKGD;
+#endif
+#ifdef PNG_READ_cHRM_SUPPORTED
+ PNG_cHRM;
+#endif
+#ifdef PNG_READ_gAMA_SUPPORTED
+ PNG_gAMA;
+#endif
+#ifdef PNG_READ_hIST_SUPPORTED
+ PNG_hIST;
+#endif
+#ifdef PNG_READ_iCCP_SUPPORTED
+ PNG_iCCP;
+#endif
+#ifdef PNG_READ_iTXt_SUPPORTED
+ PNG_iTXt;
+#endif
+#ifdef PNG_READ_oFFs_SUPPORTED
+ PNG_oFFs;
+#endif
+#ifdef PNG_READ_pCAL_SUPPORTED
+ PNG_pCAL;
+#endif
+#ifdef PNG_READ_pHYs_SUPPORTED
+ PNG_pHYs;
+#endif
+#ifdef PNG_READ_sBIT_SUPPORTED
+ PNG_sBIT;
+#endif
+#ifdef PNG_READ_sCAL_SUPPORTED
+ PNG_sCAL;
+#endif
+#ifdef PNG_READ_sPLT_SUPPORTED
+ PNG_sPLT;
+#endif
+#ifdef PNG_READ_sRGB_SUPPORTED
+ PNG_sRGB;
+#endif
+#ifdef PNG_READ_tEXt_SUPPORTED
+ PNG_tEXt;
+#endif
+#ifdef PNG_READ_tIME_SUPPORTED
+ PNG_tIME;
+#endif
+#ifdef PNG_READ_tRNS_SUPPORTED
+ PNG_tRNS;
+#endif
+#ifdef PNG_READ_zTXt_SUPPORTED
+ PNG_zTXt;
+#endif
+ png_uint_32 length = png_read_chunk_header(png_ptr);
+ PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
+
+ /* This should be a binary subdivision search or a hash for
+ * matching the chunk name rather than a linear search.
+ */
+ if (!png_memcmp(chunk_name, png_IDAT, 4))
+ if (png_ptr->mode & PNG_AFTER_IDAT)
+ png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
+
+ if (!png_memcmp(chunk_name, png_IHDR, 4))
+ png_handle_IHDR(png_ptr, info_ptr, length);
+
+ else if (!png_memcmp(chunk_name, png_IEND, 4))
+ png_handle_IEND(png_ptr, info_ptr, length);
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ else if (png_handle_as_unknown(png_ptr, chunk_name))
+ {
+ if (!png_memcmp(chunk_name, png_IDAT, 4))
+ png_ptr->mode |= PNG_HAVE_IDAT;
+
+ png_handle_unknown(png_ptr, info_ptr, length);
+
+ if (!png_memcmp(chunk_name, png_PLTE, 4))
+ png_ptr->mode |= PNG_HAVE_PLTE;
+
+ else if (!png_memcmp(chunk_name, png_IDAT, 4))
+ {
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before IDAT");
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
+ !(png_ptr->mode & PNG_HAVE_PLTE))
+ png_error(png_ptr, "Missing PLTE before IDAT");
+
+ break;
+ }
+ }
+#endif
+ else if (!png_memcmp(chunk_name, png_PLTE, 4))
+ png_handle_PLTE(png_ptr, info_ptr, length);
+
+ else if (!png_memcmp(chunk_name, png_IDAT, 4))
+ {
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before IDAT");
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
+ !(png_ptr->mode & PNG_HAVE_PLTE))
+ png_error(png_ptr, "Missing PLTE before IDAT");
+
+ png_ptr->idat_size = length;
+ png_ptr->mode |= PNG_HAVE_IDAT;
+ break;
+ }
+
+#ifdef PNG_READ_bKGD_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_bKGD, 4))
+ png_handle_bKGD(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_cHRM_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_cHRM, 4))
+ png_handle_cHRM(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_gAMA_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_gAMA, 4))
+ png_handle_gAMA(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_hIST_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_hIST, 4))
+ png_handle_hIST(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_oFFs_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_oFFs, 4))
+ png_handle_oFFs(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_pCAL_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_pCAL, 4))
+ png_handle_pCAL(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_sCAL_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_sCAL, 4))
+ png_handle_sCAL(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_pHYs_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_pHYs, 4))
+ png_handle_pHYs(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_sBIT_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_sBIT, 4))
+ png_handle_sBIT(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_sRGB_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_sRGB, 4))
+ png_handle_sRGB(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_iCCP_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_iCCP, 4))
+ png_handle_iCCP(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_sPLT_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_sPLT, 4))
+ png_handle_sPLT(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_tEXt_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_tEXt, 4))
+ png_handle_tEXt(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_tIME_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_tIME, 4))
+ png_handle_tIME(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_tRNS_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_tRNS, 4))
+ png_handle_tRNS(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_zTXt_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_zTXt, 4))
+ png_handle_zTXt(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_iTXt_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_iTXt, 4))
+ png_handle_iTXt(png_ptr, info_ptr, length);
+#endif
+
+ else
+ png_handle_unknown(png_ptr, info_ptr, length);
+ }
+}
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+
+/* Optional call to update the users info_ptr structure */
+void PNGAPI
+png_read_update_info(png_structp png_ptr, png_infop info_ptr)
+{
+ png_debug(1, "in png_read_update_info");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
+ png_read_start_row(png_ptr);
+
+ else
+ png_warning(png_ptr,
+ "Ignoring extra png_read_update_info() call;"
+ " row buffer not reallocated");
+
+ png_read_transform_info(png_ptr, info_ptr);
+}
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Initialize palette, background, etc, after transformations
+ * are set, but before any reading takes place. This allows
+ * the user to obtain a gamma-corrected palette, for example.
+ * If the user doesn't call this, we will do it ourselves.
+ */
+void PNGAPI
+png_start_read_image(png_structp png_ptr)
+{
+ png_debug(1, "in png_start_read_image");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
+ png_read_start_row(png_ptr);
+ else
+ png_warning(png_ptr,
+ "Ignoring extra png_start_read_image() call;"
+ " row buffer not reallocated");
+}
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+void PNGAPI
+png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
+{
+ PNG_IDAT;
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
+ 0xff};
+ PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
+#endif
+ int ret;
+
+ if (png_ptr == NULL)
+ return;
+
+ png_debug2(1, "in png_read_row (row %lu, pass %d)",
+ (unsigned long)png_ptr->row_number, png_ptr->pass);
+
+ if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
+ png_read_start_row(png_ptr);
+
+ if (png_ptr->row_number == 0 && png_ptr->pass == 0)
+ {
+ /* Check for transforms that have been set but were defined out */
+#if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED)
+ if (png_ptr->transformations & PNG_INVERT_MONO)
+ png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined");
+#endif
+
+#if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED)
+ if (png_ptr->transformations & PNG_FILLER)
+ png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined");
+#endif
+
+#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \
+ !defined(PNG_READ_PACKSWAP_SUPPORTED)
+ if (png_ptr->transformations & PNG_PACKSWAP)
+ png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined");
+#endif
+
+#if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED)
+ if (png_ptr->transformations & PNG_PACK)
+ png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined");
+#endif
+
+#if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED)
+ if (png_ptr->transformations & PNG_SHIFT)
+ png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined");
+#endif
+
+#if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED)
+ if (png_ptr->transformations & PNG_BGR)
+ png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined");
+#endif
+
+#if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED)
+ if (png_ptr->transformations & PNG_SWAP_BYTES)
+ png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined");
+#endif
+ }
+
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ /* If interlaced and we do not need a new row, combine row and return */
+ if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
+ {
+ switch (png_ptr->pass)
+ {
+ case 0:
+ if (png_ptr->row_number & 0x07)
+ {
+ if (dsp_row != NULL)
+ png_combine_row(png_ptr, dsp_row,
+ png_pass_dsp_mask[png_ptr->pass]);
+ png_read_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 1:
+ if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
+ {
+ if (dsp_row != NULL)
+ png_combine_row(png_ptr, dsp_row,
+ png_pass_dsp_mask[png_ptr->pass]);
+
+ png_read_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 2:
+ if ((png_ptr->row_number & 0x07) != 4)
+ {
+ if (dsp_row != NULL && (png_ptr->row_number & 4))
+ png_combine_row(png_ptr, dsp_row,
+ png_pass_dsp_mask[png_ptr->pass]);
+
+ png_read_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 3:
+ if ((png_ptr->row_number & 3) || png_ptr->width < 3)
+ {
+ if (dsp_row != NULL)
+ png_combine_row(png_ptr, dsp_row,
+ png_pass_dsp_mask[png_ptr->pass]);
+
+ png_read_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 4:
+ if ((png_ptr->row_number & 3) != 2)
+ {
+ if (dsp_row != NULL && (png_ptr->row_number & 2))
+ png_combine_row(png_ptr, dsp_row,
+ png_pass_dsp_mask[png_ptr->pass]);
+
+ png_read_finish_row(png_ptr);
+ return;
+ }
+ break;
+ case 5:
+ if ((png_ptr->row_number & 1) || png_ptr->width < 2)
+ {
+ if (dsp_row != NULL)
+ png_combine_row(png_ptr, dsp_row,
+ png_pass_dsp_mask[png_ptr->pass]);
+
+ png_read_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ default:
+ case 6:
+ if (!(png_ptr->row_number & 1))
+ {
+ png_read_finish_row(png_ptr);
+ return;
+ }
+ break;
+ }
+ }
+#endif
+
+ if (!(png_ptr->mode & PNG_HAVE_IDAT))
+ png_error(png_ptr, "Invalid attempt to read row data");
+
+ png_ptr->zstream.next_out = png_ptr->row_buf;
+ png_ptr->zstream.avail_out =
+ (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth,
+ png_ptr->iwidth) + 1);
+
+ do
+ {
+ if (!(png_ptr->zstream.avail_in))
+ {
+ while (!png_ptr->idat_size)
+ {
+ png_crc_finish(png_ptr, 0);
+
+ png_ptr->idat_size = png_read_chunk_header(png_ptr);
+ if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ png_error(png_ptr, "Not enough image data");
+ }
+ png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_in = png_ptr->zbuf;
+ if (png_ptr->zbuf_size > png_ptr->idat_size)
+ png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size;
+ png_crc_read(png_ptr, png_ptr->zbuf,
+ (png_size_t)png_ptr->zstream.avail_in);
+ png_ptr->idat_size -= png_ptr->zstream.avail_in;
+ }
+
+ ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
+
+ if (ret == Z_STREAM_END)
+ {
+ if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in ||
+ png_ptr->idat_size)
+ png_benign_error(png_ptr, "Extra compressed data");
+ png_ptr->mode |= PNG_AFTER_IDAT;
+ png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+ break;
+ }
+
+ if (ret != Z_OK)
+ png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg :
+ "Decompression error");
+
+ } while (png_ptr->zstream.avail_out);
+
+ png_ptr->row_info.color_type = png_ptr->color_type;
+ png_ptr->row_info.width = png_ptr->iwidth;
+ png_ptr->row_info.channels = png_ptr->channels;
+ png_ptr->row_info.bit_depth = png_ptr->bit_depth;
+ png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
+ png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
+ png_ptr->row_info.width);
+
+ if (png_ptr->row_buf[0])
+ png_read_filter_row(png_ptr, &(png_ptr->row_info),
+ png_ptr->row_buf + 1, png_ptr->prev_row + 1,
+ (int)(png_ptr->row_buf[0]));
+
+ png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+ (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
+ {
+ /* Intrapixel differencing */
+ png_do_read_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ }
+#endif
+
+
+ if (png_ptr->transformations)
+ png_do_read_transformations(png_ptr);
+
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ /* Blow up interlaced rows to full size */
+ if (png_ptr->interlaced &&
+ (png_ptr->transformations & PNG_INTERLACE))
+ {
+ if (png_ptr->pass < 6)
+ /* Old interface (pre-1.0.9):
+ * png_do_read_interlace(&(png_ptr->row_info),
+ * png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
+ */
+ png_do_read_interlace(png_ptr);
+
+ if (dsp_row != NULL)
+ png_combine_row(png_ptr, dsp_row, png_pass_dsp_mask[png_ptr->pass]);
+
+ if (row != NULL)
+ png_combine_row(png_ptr, row, png_pass_mask[png_ptr->pass]);
+ }
+
+ else
+#endif
+ {
+ if (row != NULL)
+ png_combine_row(png_ptr, row, 0xff);
+
+ if (dsp_row != NULL)
+ png_combine_row(png_ptr, dsp_row, 0xff);
+ }
+ png_read_finish_row(png_ptr);
+
+ if (png_ptr->read_row_fn != NULL)
+ (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
+}
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read one or more rows of image data. If the image is interlaced,
+ * and png_set_interlace_handling() has been called, the rows need to
+ * contain the contents of the rows from the previous pass. If the
+ * image has alpha or transparency, and png_handle_alpha()[*] has been
+ * called, the rows contents must be initialized to the contents of the
+ * screen.
+ *
+ * "row" holds the actual image, and pixels are placed in it
+ * as they arrive. If the image is displayed after each pass, it will
+ * appear to "sparkle" in. "display_row" can be used to display a
+ * "chunky" progressive image, with finer detail added as it becomes
+ * available. If you do not want this "chunky" display, you may pass
+ * NULL for display_row. If you do not want the sparkle display, and
+ * you have not called png_handle_alpha(), you may pass NULL for rows.
+ * If you have called png_handle_alpha(), and the image has either an
+ * alpha channel or a transparency chunk, you must provide a buffer for
+ * rows. In this case, you do not have to provide a display_row buffer
+ * also, but you may. If the image is not interlaced, or if you have
+ * not called png_set_interlace_handling(), the display_row buffer will
+ * be ignored, so pass NULL to it.
+ *
+ * [*] png_handle_alpha() does not exist yet, as of this version of libpng
+ */
+
+void PNGAPI
+png_read_rows(png_structp png_ptr, png_bytepp row,
+ png_bytepp display_row, png_uint_32 num_rows)
+{
+ png_uint_32 i;
+ png_bytepp rp;
+ png_bytepp dp;
+
+ png_debug(1, "in png_read_rows");
+
+ if (png_ptr == NULL)
+ return;
+
+ rp = row;
+ dp = display_row;
+ if (rp != NULL && dp != NULL)
+ for (i = 0; i < num_rows; i++)
+ {
+ png_bytep rptr = *rp++;
+ png_bytep dptr = *dp++;
+
+ png_read_row(png_ptr, rptr, dptr);
+ }
+
+ else if (rp != NULL)
+ for (i = 0; i < num_rows; i++)
+ {
+ png_bytep rptr = *rp;
+ png_read_row(png_ptr, rptr, NULL);
+ rp++;
+ }
+
+ else if (dp != NULL)
+ for (i = 0; i < num_rows; i++)
+ {
+ png_bytep dptr = *dp;
+ png_read_row(png_ptr, NULL, dptr);
+ dp++;
+ }
+}
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read the entire image. If the image has an alpha channel or a tRNS
+ * chunk, and you have called png_handle_alpha()[*], you will need to
+ * initialize the image to the current image that PNG will be overlaying.
+ * We set the num_rows again here, in case it was incorrectly set in
+ * png_read_start_row() by a call to png_read_update_info() or
+ * png_start_read_image() if png_set_interlace_handling() wasn't called
+ * prior to either of these functions like it should have been. You can
+ * only call this function once. If you desire to have an image for
+ * each pass of a interlaced image, use png_read_rows() instead.
+ *
+ * [*] png_handle_alpha() does not exist yet, as of this version of libpng
+ */
+void PNGAPI
+png_read_image(png_structp png_ptr, png_bytepp image)
+{
+ png_uint_32 i, image_height;
+ int pass, j;
+ png_bytepp rp;
+
+ png_debug(1, "in png_read_image");
+
+ if (png_ptr == NULL)
+ return;
+
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
+ {
+ pass = png_set_interlace_handling(png_ptr);
+ /* And make sure transforms are initialized. */
+ png_start_read_image(png_ptr);
+ }
+ else
+ {
+ if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE))
+ {
+ /* Caller called png_start_read_image or png_read_update_info without
+ * first turning on the PNG_INTERLACE transform. We can fix this here,
+ * but the caller should do it!
+ */
+ png_warning(png_ptr, "Interlace handling should be turned on when "
+ "using png_read_image");
+ /* Make sure this is set correctly */
+ png_ptr->num_rows = png_ptr->height;
+ }
+
+ /* Obtain the pass number, which also turns on the PNG_INTERLACE flag in
+ * the above error case.
+ */
+ pass = png_set_interlace_handling(png_ptr);
+ }
+#else
+ if (png_ptr->interlaced)
+ png_error(png_ptr,
+ "Cannot read interlaced image -- interlace handler disabled");
+
+ pass = 1;
+#endif
+
+ image_height=png_ptr->height;
+
+ for (j = 0; j < pass; j++)
+ {
+ rp = image;
+ for (i = 0; i < image_height; i++)
+ {
+ png_read_row(png_ptr, *rp, NULL);
+ rp++;
+ }
+ }
+}
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+/* Read the end of the PNG file. Will not read past the end of the
+ * file, will verify the end is accurate, and will read any comments
+ * or time information at the end of the file, if info is not NULL.
+ */
+void PNGAPI
+png_read_end(png_structp png_ptr, png_infop info_ptr)
+{
+ png_debug(1, "in png_read_end");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
+
+ do
+ {
+ PNG_IHDR;
+ PNG_IDAT;
+ PNG_IEND;
+ PNG_PLTE;
+#ifdef PNG_READ_bKGD_SUPPORTED
+ PNG_bKGD;
+#endif
+#ifdef PNG_READ_cHRM_SUPPORTED
+ PNG_cHRM;
+#endif
+#ifdef PNG_READ_gAMA_SUPPORTED
+ PNG_gAMA;
+#endif
+#ifdef PNG_READ_hIST_SUPPORTED
+ PNG_hIST;
+#endif
+#ifdef PNG_READ_iCCP_SUPPORTED
+ PNG_iCCP;
+#endif
+#ifdef PNG_READ_iTXt_SUPPORTED
+ PNG_iTXt;
+#endif
+#ifdef PNG_READ_oFFs_SUPPORTED
+ PNG_oFFs;
+#endif
+#ifdef PNG_READ_pCAL_SUPPORTED
+ PNG_pCAL;
+#endif
+#ifdef PNG_READ_pHYs_SUPPORTED
+ PNG_pHYs;
+#endif
+#ifdef PNG_READ_sBIT_SUPPORTED
+ PNG_sBIT;
+#endif
+#ifdef PNG_READ_sCAL_SUPPORTED
+ PNG_sCAL;
+#endif
+#ifdef PNG_READ_sPLT_SUPPORTED
+ PNG_sPLT;
+#endif
+#ifdef PNG_READ_sRGB_SUPPORTED
+ PNG_sRGB;
+#endif
+#ifdef PNG_READ_tEXt_SUPPORTED
+ PNG_tEXt;
+#endif
+#ifdef PNG_READ_tIME_SUPPORTED
+ PNG_tIME;
+#endif
+#ifdef PNG_READ_tRNS_SUPPORTED
+ PNG_tRNS;
+#endif
+#ifdef PNG_READ_zTXt_SUPPORTED
+ PNG_zTXt;
+#endif
+ png_uint_32 length = png_read_chunk_header(png_ptr);
+ PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
+
+ if (!png_memcmp(chunk_name, png_IHDR, 4))
+ png_handle_IHDR(png_ptr, info_ptr, length);
+
+ else if (!png_memcmp(chunk_name, png_IEND, 4))
+ png_handle_IEND(png_ptr, info_ptr, length);
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ else if (png_handle_as_unknown(png_ptr, chunk_name))
+ {
+ if (!png_memcmp(chunk_name, png_IDAT, 4))
+ {
+ if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
+ png_benign_error(png_ptr, "Too many IDATs found");
+ }
+ png_handle_unknown(png_ptr, info_ptr, length);
+ if (!png_memcmp(chunk_name, png_PLTE, 4))
+ png_ptr->mode |= PNG_HAVE_PLTE;
+ }
+#endif
+
+ else if (!png_memcmp(chunk_name, png_IDAT, 4))
+ {
+ /* Zero length IDATs are legal after the last IDAT has been
+ * read, but not after other chunks have been read.
+ */
+ if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
+ png_benign_error(png_ptr, "Too many IDATs found");
+
+ png_crc_finish(png_ptr, length);
+ }
+ else if (!png_memcmp(chunk_name, png_PLTE, 4))
+ png_handle_PLTE(png_ptr, info_ptr, length);
+
+#ifdef PNG_READ_bKGD_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_bKGD, 4))
+ png_handle_bKGD(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_cHRM_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_cHRM, 4))
+ png_handle_cHRM(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_gAMA_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_gAMA, 4))
+ png_handle_gAMA(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_hIST_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_hIST, 4))
+ png_handle_hIST(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_oFFs_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_oFFs, 4))
+ png_handle_oFFs(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_pCAL_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_pCAL, 4))
+ png_handle_pCAL(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_sCAL_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_sCAL, 4))
+ png_handle_sCAL(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_pHYs_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_pHYs, 4))
+ png_handle_pHYs(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_sBIT_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_sBIT, 4))
+ png_handle_sBIT(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_sRGB_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_sRGB, 4))
+ png_handle_sRGB(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_iCCP_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_iCCP, 4))
+ png_handle_iCCP(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_sPLT_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_sPLT, 4))
+ png_handle_sPLT(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_tEXt_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_tEXt, 4))
+ png_handle_tEXt(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_tIME_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_tIME, 4))
+ png_handle_tIME(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_tRNS_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_tRNS, 4))
+ png_handle_tRNS(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_zTXt_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_zTXt, 4))
+ png_handle_zTXt(png_ptr, info_ptr, length);
+#endif
+
+#ifdef PNG_READ_iTXt_SUPPORTED
+ else if (!png_memcmp(chunk_name, png_iTXt, 4))
+ png_handle_iTXt(png_ptr, info_ptr, length);
+#endif
+
+ else
+ png_handle_unknown(png_ptr, info_ptr, length);
+ } while (!(png_ptr->mode & PNG_HAVE_IEND));
+}
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+
+/* Free all memory used by the read */
+void PNGAPI
+png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
+ png_infopp end_info_ptr_ptr)
+{
+ png_structp png_ptr = NULL;
+ png_infop info_ptr = NULL, end_info_ptr = NULL;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_free_ptr free_fn = NULL;
+ png_voidp mem_ptr = NULL;
+#endif
+
+ png_debug(1, "in png_destroy_read_struct");
+
+ if (png_ptr_ptr != NULL)
+ png_ptr = *png_ptr_ptr;
+ if (png_ptr == NULL)
+ return;
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ free_fn = png_ptr->free_fn;
+ mem_ptr = png_ptr->mem_ptr;
+#endif
+
+ if (info_ptr_ptr != NULL)
+ info_ptr = *info_ptr_ptr;
+
+ if (end_info_ptr_ptr != NULL)
+ end_info_ptr = *end_info_ptr_ptr;
+
+ png_read_destroy(png_ptr, info_ptr, end_info_ptr);
+
+ if (info_ptr != NULL)
+ {
+#ifdef PNG_TEXT_SUPPORTED
+ png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1);
+#endif
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
+ (png_voidp)mem_ptr);
+#else
+ png_destroy_struct((png_voidp)info_ptr);
+#endif
+ *info_ptr_ptr = NULL;
+ }
+
+ if (end_info_ptr != NULL)
+ {
+#ifdef PNG_READ_TEXT_SUPPORTED
+ png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
+#endif
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn,
+ (png_voidp)mem_ptr);
+#else
+ png_destroy_struct((png_voidp)end_info_ptr);
+#endif
+ *end_info_ptr_ptr = NULL;
+ }
+
+ if (png_ptr != NULL)
+ {
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
+ (png_voidp)mem_ptr);
+#else
+ png_destroy_struct((png_voidp)png_ptr);
+#endif
+ *png_ptr_ptr = NULL;
+ }
+}
+
+/* Free all memory used by the read (old method) */
+void /* PRIVATE */
+png_read_destroy(png_structp png_ptr, png_infop info_ptr,
+ png_infop end_info_ptr)
+{
+#ifdef PNG_SETJMP_SUPPORTED
+ jmp_buf tmp_jmp;
+#endif
+ png_error_ptr error_fn;
+ png_error_ptr warning_fn;
+ png_voidp error_ptr;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_free_ptr free_fn;
+#endif
+
+ png_debug(1, "in png_read_destroy");
+
+ if (info_ptr != NULL)
+ png_info_destroy(png_ptr, info_ptr);
+
+ if (end_info_ptr != NULL)
+ png_info_destroy(png_ptr, end_info_ptr);
+
+ png_free(png_ptr, png_ptr->zbuf);
+ png_free(png_ptr, png_ptr->big_row_buf);
+ png_free(png_ptr, png_ptr->prev_row);
+ png_free(png_ptr, png_ptr->chunkdata);
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+ png_free(png_ptr, png_ptr->palette_lookup);
+ png_free(png_ptr, png_ptr->quantize_index);
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ png_free(png_ptr, png_ptr->gamma_table);
+#endif
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+ png_free(png_ptr, png_ptr->gamma_from_1);
+ png_free(png_ptr, png_ptr->gamma_to_1);
+#endif
+
+ if (png_ptr->free_me & PNG_FREE_PLTE)
+ png_zfree(png_ptr, png_ptr->palette);
+ png_ptr->free_me &= ~PNG_FREE_PLTE;
+
+#if defined(PNG_tRNS_SUPPORTED) || \
+ defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ if (png_ptr->free_me & PNG_FREE_TRNS)
+ png_free(png_ptr, png_ptr->trans_alpha);
+ png_ptr->free_me &= ~PNG_FREE_TRNS;
+#endif
+
+#ifdef PNG_READ_hIST_SUPPORTED
+ if (png_ptr->free_me & PNG_FREE_HIST)
+ png_free(png_ptr, png_ptr->hist);
+ png_ptr->free_me &= ~PNG_FREE_HIST;
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (png_ptr->gamma_16_table != NULL)
+ {
+ int i;
+ int istop = (1 << (8 - png_ptr->gamma_shift));
+ for (i = 0; i < istop; i++)
+ {
+ png_free(png_ptr, png_ptr->gamma_16_table[i]);
+ }
+ png_free(png_ptr, png_ptr->gamma_16_table);
+ }
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+ if (png_ptr->gamma_16_from_1 != NULL)
+ {
+ int i;
+ int istop = (1 << (8 - png_ptr->gamma_shift));
+ for (i = 0; i < istop; i++)
+ {
+ png_free(png_ptr, png_ptr->gamma_16_from_1[i]);
+ }
+ png_free(png_ptr, png_ptr->gamma_16_from_1);
+ }
+ if (png_ptr->gamma_16_to_1 != NULL)
+ {
+ int i;
+ int istop = (1 << (8 - png_ptr->gamma_shift));
+ for (i = 0; i < istop; i++)
+ {
+ png_free(png_ptr, png_ptr->gamma_16_to_1[i]);
+ }
+ png_free(png_ptr, png_ptr->gamma_16_to_1);
+ }
+#endif
+#endif
+
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+ png_free(png_ptr, png_ptr->time_buffer);
+#endif
+
+ inflateEnd(&png_ptr->zstream);
+
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+ png_free(png_ptr, png_ptr->save_buffer);
+#endif
+
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+#ifdef PNG_TEXT_SUPPORTED
+ png_free(png_ptr, png_ptr->current_text);
+#endif /* PNG_TEXT_SUPPORTED */
+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+
+ /* Save the important info out of the png_struct, in case it is
+ * being used again.
+ */
+#ifdef PNG_SETJMP_SUPPORTED
+ png_memcpy(tmp_jmp, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
+#endif
+
+ error_fn = png_ptr->error_fn;
+ warning_fn = png_ptr->warning_fn;
+ error_ptr = png_ptr->error_ptr;
+#ifdef PNG_USER_MEM_SUPPORTED
+ free_fn = png_ptr->free_fn;
+#endif
+
+ png_memset(png_ptr, 0, png_sizeof(png_struct));
+
+ png_ptr->error_fn = error_fn;
+ png_ptr->warning_fn = warning_fn;
+ png_ptr->error_ptr = error_ptr;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_ptr->free_fn = free_fn;
+#endif
+
+#ifdef PNG_SETJMP_SUPPORTED
+ png_memcpy(png_ptr->png_jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
+#endif
+
+}
+
+void PNGAPI
+png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->read_row_fn = read_row_fn;
+}
+
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+void PNGAPI
+png_read_png(png_structp png_ptr, png_infop info_ptr,
+ int transforms,
+ voidp params)
+{
+ int row;
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ /* png_read_info() gives us all of the information from the
+ * PNG file before the first IDAT (image data chunk).
+ */
+ png_read_info(png_ptr, info_ptr);
+ if (info_ptr->height > PNG_UINT_32_MAX/png_sizeof(png_bytep))
+ png_error(png_ptr, "Image is too high to process with png_read_png()");
+
+ /* -------------- image transformations start here ------------------- */
+
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+ /* Tell libpng to strip 16 bit/color files down to 8 bits per color.
+ */
+ if (transforms & PNG_TRANSFORM_STRIP_16)
+ png_set_strip_16(png_ptr);
+#endif
+
+#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
+ /* Strip alpha bytes from the input data without combining with
+ * the background (not recommended).
+ */
+ if (transforms & PNG_TRANSFORM_STRIP_ALPHA)
+ png_set_strip_alpha(png_ptr);
+#endif
+
+#if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED)
+ /* Extract multiple pixels with bit depths of 1, 2, or 4 from a single
+ * byte into separate bytes (useful for paletted and grayscale images).
+ */
+ if (transforms & PNG_TRANSFORM_PACKING)
+ png_set_packing(png_ptr);
+#endif
+
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
+ /* Change the order of packed pixels to least significant bit first
+ * (not useful if you are using png_set_packing).
+ */
+ if (transforms & PNG_TRANSFORM_PACKSWAP)
+ png_set_packswap(png_ptr);
+#endif
+
+#ifdef PNG_READ_EXPAND_SUPPORTED
+ /* Expand paletted colors into true RGB triplets
+ * Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel
+ * Expand paletted or RGB images with transparency to full alpha
+ * channels so the data will be available as RGBA quartets.
+ */
+ if (transforms & PNG_TRANSFORM_EXPAND)
+ if ((png_ptr->bit_depth < 8) ||
+ (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
+ (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
+ png_set_expand(png_ptr);
+#endif
+
+ /* We don't handle background color or gamma transformation or quantizing.
+ */
+
+#ifdef PNG_READ_INVERT_SUPPORTED
+ /* Invert monochrome files to have 0 as white and 1 as black
+ */
+ if (transforms & PNG_TRANSFORM_INVERT_MONO)
+ png_set_invert_mono(png_ptr);
+#endif
+
+#ifdef PNG_READ_SHIFT_SUPPORTED
+ /* If you want to shift the pixel values from the range [0,255] or
+ * [0,65535] to the original [0,7] or [0,31], or whatever range the
+ * colors were originally in:
+ */
+ if ((transforms & PNG_TRANSFORM_SHIFT)
+ && png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT))
+ {
+ png_color_8p sig_bit;
+
+ png_get_sBIT(png_ptr, info_ptr, &sig_bit);
+ png_set_shift(png_ptr, sig_bit);
+ }
+#endif
+
+#ifdef PNG_READ_BGR_SUPPORTED
+ /* Flip the RGB pixels to BGR (or RGBA to BGRA) */
+ if (transforms & PNG_TRANSFORM_BGR)
+ png_set_bgr(png_ptr);
+#endif
+
+#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
+ /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */
+ if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
+ png_set_swap_alpha(png_ptr);
+#endif
+
+#ifdef PNG_READ_SWAP_SUPPORTED
+ /* Swap bytes of 16 bit files to least significant byte first */
+ if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
+ png_set_swap(png_ptr);
+#endif
+
+/* Added at libpng-1.2.41 */
+#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
+ /* Invert the alpha channel from opacity to transparency */
+ if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
+ png_set_invert_alpha(png_ptr);
+#endif
+
+/* Added at libpng-1.2.41 */
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+ /* Expand grayscale image to RGB */
+ if (transforms & PNG_TRANSFORM_GRAY_TO_RGB)
+ png_set_gray_to_rgb(png_ptr);
+#endif
+
+ /* We don't handle adding filler bytes */
+
+ /* We use png_read_image and rely on that for interlace handling, but we also
+ * call png_read_update_info therefore must turn on interlace handling now:
+ */
+ (void)png_set_interlace_handling(png_ptr);
+
+ /* Optional call to gamma correct and add the background to the palette
+ * and update info structure. REQUIRED if you are expecting libpng to
+ * update the palette for you (i.e., you selected such a transform above).
+ */
+ png_read_update_info(png_ptr, info_ptr);
+
+ /* -------------- image transformations end here ------------------- */
+
+ png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
+ if (info_ptr->row_pointers == NULL)
+ {
+ png_uint_32 iptr;
+
+ info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
+ info_ptr->height * png_sizeof(png_bytep));
+ for (iptr=0; iptr<info_ptr->height; iptr++)
+ info_ptr->row_pointers[iptr] = NULL;
+
+ info_ptr->free_me |= PNG_FREE_ROWS;
+
+ for (row = 0; row < (int)info_ptr->height; row++)
+ info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr,
+ png_get_rowbytes(png_ptr, info_ptr));
+ }
+
+ png_read_image(png_ptr, info_ptr->row_pointers);
+ info_ptr->valid |= PNG_INFO_IDAT;
+
+ /* Read rest of file, and get additional chunks in info_ptr - REQUIRED */
+ png_read_end(png_ptr, info_ptr);
+
+ PNG_UNUSED(transforms) /* Quiet compiler warnings */
+ PNG_UNUSED(params)
+
+}
+#endif /* PNG_INFO_IMAGE_SUPPORTED */
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED */
--- /dev/null
+
+/* pngrio.c - functions for data input
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * This file provides a location for all input. Users who need
+ * special handling are expected to write a function that has the same
+ * arguments as this and performs a similar function, but that possibly
+ * has a different input method. Note that you shouldn't change this
+ * function, but rather write a replacement function and then make
+ * libpng use it at run time with png_set_read_fn(...).
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_READ_SUPPORTED
+
+/* Read the data from whatever input you are using. The default routine
+ * reads from a file pointer. Note that this routine sometimes gets called
+ * with very small lengths, so you should implement some kind of simple
+ * buffering if you are using unbuffered reads. This should never be asked
+ * to read more then 64K on a 16 bit machine.
+ */
+void /* PRIVATE */
+png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+ png_debug1(4, "reading %d bytes", (int)length);
+
+ if (png_ptr->read_data_fn != NULL)
+ (*(png_ptr->read_data_fn))(png_ptr, data, length);
+
+ else
+ png_error(png_ptr, "Call to NULL read function");
+}
+
+#ifdef PNG_STDIO_SUPPORTED
+/* This is the function that does the actual reading of data. If you are
+ * not reading from a standard C stream, you should create a replacement
+ * read_data function and use it at run time with png_set_read_fn(), rather
+ * than changing the library.
+ */
+# ifndef USE_FAR_KEYWORD
+void PNGCBAPI
+png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+ png_size_t check;
+
+ if (png_ptr == NULL)
+ return;
+
+ /* fread() returns 0 on error, so it is OK to store this in a png_size_t
+ * instead of an int, which is what fread() actually returns.
+ */
+ check = fread(data, 1, length, (png_FILE_p)png_ptr->io_ptr);
+
+ if (check != length)
+ png_error(png_ptr, "Read Error");
+}
+# else
+/* This is the model-independent version. Since the standard I/O library
+ can't handle far buffers in the medium and small models, we have to copy
+ the data.
+*/
+
+#define NEAR_BUF_SIZE 1024
+#define MIN(a,b) (a <= b ? a : b)
+
+static void PNGCBAPI
+png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+ png_size_t check;
+ png_byte *n_data;
+ png_FILE_p io_ptr;
+
+ if (png_ptr == NULL)
+ return;
+
+ /* Check if data really is near. If so, use usual code. */
+ n_data = (png_byte *)CVT_PTR_NOCHECK(data);
+ io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
+
+ if ((png_bytep)n_data == data)
+ {
+ check = fread(n_data, 1, length, io_ptr);
+ }
+
+ else
+ {
+ png_byte buf[NEAR_BUF_SIZE];
+ png_size_t read, remaining, err;
+ check = 0;
+ remaining = length;
+
+ do
+ {
+ read = MIN(NEAR_BUF_SIZE, remaining);
+ err = fread(buf, 1, read, io_ptr);
+ png_memcpy(data, buf, read); /* copy far buffer to near buffer */
+
+ if (err != read)
+ break;
+
+ else
+ check += err;
+
+ data += read;
+ remaining -= read;
+ }
+ while (remaining != 0);
+ }
+
+ if ((png_uint_32)check != (png_uint_32)length)
+ png_error(png_ptr, "read Error");
+}
+# endif
+#endif
+
+/* This function allows the application to supply a new input function
+ * for libpng if standard C streams aren't being used.
+ *
+ * This function takes as its arguments:
+ *
+ * png_ptr - pointer to a png input data structure
+ *
+ * io_ptr - pointer to user supplied structure containing info about
+ * the input functions. May be NULL.
+ *
+ * read_data_fn - pointer to a new input function that takes as its
+ * arguments a pointer to a png_struct, a pointer to
+ * a location where input data can be stored, and a 32-bit
+ * unsigned int that is the number of bytes to be read.
+ * To exit and output any fatal error messages the new write
+ * function should call png_error(png_ptr, "Error msg").
+ * May be NULL, in which case libpng's default function will
+ * be used.
+ */
+void PNGAPI
+png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
+ png_rw_ptr read_data_fn)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->io_ptr = io_ptr;
+
+#ifdef PNG_STDIO_SUPPORTED
+ if (read_data_fn != NULL)
+ png_ptr->read_data_fn = read_data_fn;
+
+ else
+ png_ptr->read_data_fn = png_default_read_data;
+#else
+ png_ptr->read_data_fn = read_data_fn;
+#endif
+
+ /* It is an error to write to a read device */
+ if (png_ptr->write_data_fn != NULL)
+ {
+ png_ptr->write_data_fn = NULL;
+ png_warning(png_ptr,
+ "Can't set both read_data_fn and write_data_fn in the"
+ " same structure");
+ }
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+ png_ptr->output_flush_fn = NULL;
+#endif
+}
+#endif /* PNG_READ_SUPPORTED */
--- /dev/null
+
+/* pngrtran.c - transforms the data in a row for PNG readers
+ *
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * This file contains functions optionally called by an application
+ * in order to tell libpng how to handle data when reading a PNG.
+ * Transformations that are used in both reading and writing are
+ * in pngtrans.c.
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_READ_SUPPORTED
+
+/* Set the action on getting a CRC error for an ancillary or critical chunk. */
+void PNGAPI
+png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
+{
+ png_debug(1, "in png_set_crc_action");
+
+ if (png_ptr == NULL)
+ return;
+
+ /* Tell libpng how we react to CRC errors in critical chunks */
+ switch (crit_action)
+ {
+ case PNG_CRC_NO_CHANGE: /* Leave setting as is */
+ break;
+
+ case PNG_CRC_WARN_USE: /* Warn/use data */
+ png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
+ png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE;
+ break;
+
+ case PNG_CRC_QUIET_USE: /* Quiet/use data */
+ png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
+ png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE |
+ PNG_FLAG_CRC_CRITICAL_IGNORE;
+ break;
+
+ case PNG_CRC_WARN_DISCARD: /* Not a valid action for critical data */
+ png_warning(png_ptr,
+ "Can't discard critical data on CRC error");
+ case PNG_CRC_ERROR_QUIT: /* Error/quit */
+
+ case PNG_CRC_DEFAULT:
+ default:
+ png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
+ break;
+ }
+
+ /* Tell libpng how we react to CRC errors in ancillary chunks */
+ switch (ancil_action)
+ {
+ case PNG_CRC_NO_CHANGE: /* Leave setting as is */
+ break;
+
+ case PNG_CRC_WARN_USE: /* Warn/use data */
+ png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
+ png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE;
+ break;
+
+ case PNG_CRC_QUIET_USE: /* Quiet/use data */
+ png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
+ png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE |
+ PNG_FLAG_CRC_ANCILLARY_NOWARN;
+ break;
+
+ case PNG_CRC_ERROR_QUIT: /* Error/quit */
+ png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
+ png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_NOWARN;
+ break;
+
+ case PNG_CRC_WARN_DISCARD: /* Warn/discard data */
+
+ case PNG_CRC_DEFAULT:
+ default:
+ png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
+ break;
+ }
+}
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+/* Handle alpha and tRNS via a background color */
+void PNGFAPI
+png_set_background_fixed(png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, png_fixed_point background_gamma)
+{
+ png_debug(1, "in png_set_background_fixed");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN)
+ {
+ png_warning(png_ptr, "Application must supply a known background gamma");
+ return;
+ }
+
+ png_ptr->transformations |= PNG_BACKGROUND;
+ png_memcpy(&(png_ptr->background), background_color,
+ png_sizeof(png_color_16));
+ png_ptr->background_gamma = background_gamma;
+ png_ptr->background_gamma_type = (png_byte)(background_gamma_code);
+ png_ptr->transformations |= (need_expand ? PNG_BACKGROUND_EXPAND : 0);
+}
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_background(png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, double background_gamma)
+{
+ png_set_background_fixed(png_ptr, background_color, background_gamma_code,
+ need_expand, png_fixed(png_ptr, background_gamma, "png_set_background"));
+}
+# endif /* FLOATING_POINT */
+#endif /* READ_BACKGROUND */
+
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+/* Strip 16 bit depth files to 8 bit depth */
+void PNGAPI
+png_set_strip_16(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_strip_16");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_16_TO_8;
+ png_ptr->transformations &= ~PNG_EXPAND_16;
+}
+#endif
+
+#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
+void PNGAPI
+png_set_strip_alpha(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_strip_alpha");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_STRIP_ALPHA;
+}
+#endif
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+/* Dither file to 8 bit. Supply a palette, the current number
+ * of elements in the palette, the maximum number of elements
+ * allowed, and a histogram if possible. If the current number
+ * of colors is greater then the maximum number, the palette will be
+ * modified to fit in the maximum number. "full_quantize" indicates
+ * whether we need a quantizing cube set up for RGB images, or if we
+ * simply are reducing the number of colors in a paletted image.
+ */
+
+typedef struct png_dsort_struct
+{
+ struct png_dsort_struct FAR * next;
+ png_byte left;
+ png_byte right;
+} png_dsort;
+typedef png_dsort FAR * png_dsortp;
+typedef png_dsort FAR * FAR * png_dsortpp;
+
+void PNGAPI
+png_set_quantize(png_structp png_ptr, png_colorp palette,
+ int num_palette, int maximum_colors, png_const_uint_16p histogram,
+ int full_quantize)
+{
+ png_debug(1, "in png_set_quantize");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_QUANTIZE;
+
+ if (!full_quantize)
+ {
+ int i;
+
+ png_ptr->quantize_index = (png_bytep)png_malloc(png_ptr,
+ (png_uint_32)(num_palette * png_sizeof(png_byte)));
+ for (i = 0; i < num_palette; i++)
+ png_ptr->quantize_index[i] = (png_byte)i;
+ }
+
+ if (num_palette > maximum_colors)
+ {
+ if (histogram != NULL)
+ {
+ /* This is easy enough, just throw out the least used colors.
+ * Perhaps not the best solution, but good enough.
+ */
+
+ int i;
+
+ /* Initialize an array to sort colors */
+ png_ptr->quantize_sort = (png_bytep)png_malloc(png_ptr,
+ (png_uint_32)(num_palette * png_sizeof(png_byte)));
+
+ /* Initialize the quantize_sort array */
+ for (i = 0; i < num_palette; i++)
+ png_ptr->quantize_sort[i] = (png_byte)i;
+
+ /* Find the least used palette entries by starting a
+ * bubble sort, and running it until we have sorted
+ * out enough colors. Note that we don't care about
+ * sorting all the colors, just finding which are
+ * least used.
+ */
+
+ for (i = num_palette - 1; i >= maximum_colors; i--)
+ {
+ int done; /* To stop early if the list is pre-sorted */
+ int j;
+
+ done = 1;
+ for (j = 0; j < i; j++)
+ {
+ if (histogram[png_ptr->quantize_sort[j]]
+ < histogram[png_ptr->quantize_sort[j + 1]])
+ {
+ png_byte t;
+
+ t = png_ptr->quantize_sort[j];
+ png_ptr->quantize_sort[j] = png_ptr->quantize_sort[j + 1];
+ png_ptr->quantize_sort[j + 1] = t;
+ done = 0;
+ }
+ }
+
+ if (done)
+ break;
+ }
+
+ /* Swap the palette around, and set up a table, if necessary */
+ if (full_quantize)
+ {
+ int j = num_palette;
+
+ /* Put all the useful colors within the max, but don't
+ * move the others.
+ */
+ for (i = 0; i < maximum_colors; i++)
+ {
+ if ((int)png_ptr->quantize_sort[i] >= maximum_colors)
+ {
+ do
+ j--;
+ while ((int)png_ptr->quantize_sort[j] >= maximum_colors);
+
+ palette[i] = palette[j];
+ }
+ }
+ }
+ else
+ {
+ int j = num_palette;
+
+ /* Move all the used colors inside the max limit, and
+ * develop a translation table.
+ */
+ for (i = 0; i < maximum_colors; i++)
+ {
+ /* Only move the colors we need to */
+ if ((int)png_ptr->quantize_sort[i] >= maximum_colors)
+ {
+ png_color tmp_color;
+
+ do
+ j--;
+ while ((int)png_ptr->quantize_sort[j] >= maximum_colors);
+
+ tmp_color = palette[j];
+ palette[j] = palette[i];
+ palette[i] = tmp_color;
+ /* Indicate where the color went */
+ png_ptr->quantize_index[j] = (png_byte)i;
+ png_ptr->quantize_index[i] = (png_byte)j;
+ }
+ }
+
+ /* Find closest color for those colors we are not using */
+ for (i = 0; i < num_palette; i++)
+ {
+ if ((int)png_ptr->quantize_index[i] >= maximum_colors)
+ {
+ int min_d, k, min_k, d_index;
+
+ /* Find the closest color to one we threw out */
+ d_index = png_ptr->quantize_index[i];
+ min_d = PNG_COLOR_DIST(palette[d_index], palette[0]);
+ for (k = 1, min_k = 0; k < maximum_colors; k++)
+ {
+ int d;
+
+ d = PNG_COLOR_DIST(palette[d_index], palette[k]);
+
+ if (d < min_d)
+ {
+ min_d = d;
+ min_k = k;
+ }
+ }
+ /* Point to closest color */
+ png_ptr->quantize_index[i] = (png_byte)min_k;
+ }
+ }
+ }
+ png_free(png_ptr, png_ptr->quantize_sort);
+ png_ptr->quantize_sort = NULL;
+ }
+ else
+ {
+ /* This is much harder to do simply (and quickly). Perhaps
+ * we need to go through a median cut routine, but those
+ * don't always behave themselves with only a few colors
+ * as input. So we will just find the closest two colors,
+ * and throw out one of them (chosen somewhat randomly).
+ * [We don't understand this at all, so if someone wants to
+ * work on improving it, be our guest - AED, GRP]
+ */
+ int i;
+ int max_d;
+ int num_new_palette;
+ png_dsortp t;
+ png_dsortpp hash;
+
+ t = NULL;
+
+ /* Initialize palette index arrays */
+ png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr,
+ (png_uint_32)(num_palette * png_sizeof(png_byte)));
+ png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr,
+ (png_uint_32)(num_palette * png_sizeof(png_byte)));
+
+ /* Initialize the sort array */
+ for (i = 0; i < num_palette; i++)
+ {
+ png_ptr->index_to_palette[i] = (png_byte)i;
+ png_ptr->palette_to_index[i] = (png_byte)i;
+ }
+
+ hash = (png_dsortpp)png_calloc(png_ptr, (png_uint_32)(769 *
+ png_sizeof(png_dsortp)));
+
+ num_new_palette = num_palette;
+
+ /* Initial wild guess at how far apart the farthest pixel
+ * pair we will be eliminating will be. Larger
+ * numbers mean more areas will be allocated, Smaller
+ * numbers run the risk of not saving enough data, and
+ * having to do this all over again.
+ *
+ * I have not done extensive checking on this number.
+ */
+ max_d = 96;
+
+ while (num_new_palette > maximum_colors)
+ {
+ for (i = 0; i < num_new_palette - 1; i++)
+ {
+ int j;
+
+ for (j = i + 1; j < num_new_palette; j++)
+ {
+ int d;
+
+ d = PNG_COLOR_DIST(palette[i], palette[j]);
+
+ if (d <= max_d)
+ {
+
+ t = (png_dsortp)png_malloc_warn(png_ptr,
+ (png_uint_32)(png_sizeof(png_dsort)));
+
+ if (t == NULL)
+ break;
+
+ t->next = hash[d];
+ t->left = (png_byte)i;
+ t->right = (png_byte)j;
+ hash[d] = t;
+ }
+ }
+ if (t == NULL)
+ break;
+ }
+
+ if (t != NULL)
+ for (i = 0; i <= max_d; i++)
+ {
+ if (hash[i] != NULL)
+ {
+ png_dsortp p;
+
+ for (p = hash[i]; p; p = p->next)
+ {
+ if ((int)png_ptr->index_to_palette[p->left]
+ < num_new_palette &&
+ (int)png_ptr->index_to_palette[p->right]
+ < num_new_palette)
+ {
+ int j, next_j;
+
+ if (num_new_palette & 0x01)
+ {
+ j = p->left;
+ next_j = p->right;
+ }
+ else
+ {
+ j = p->right;
+ next_j = p->left;
+ }
+
+ num_new_palette--;
+ palette[png_ptr->index_to_palette[j]]
+ = palette[num_new_palette];
+ if (!full_quantize)
+ {
+ int k;
+
+ for (k = 0; k < num_palette; k++)
+ {
+ if (png_ptr->quantize_index[k] ==
+ png_ptr->index_to_palette[j])
+ png_ptr->quantize_index[k] =
+ png_ptr->index_to_palette[next_j];
+
+ if ((int)png_ptr->quantize_index[k] ==
+ num_new_palette)
+ png_ptr->quantize_index[k] =
+ png_ptr->index_to_palette[j];
+ }
+ }
+
+ png_ptr->index_to_palette[png_ptr->palette_to_index
+ [num_new_palette]] = png_ptr->index_to_palette[j];
+
+ png_ptr->palette_to_index[png_ptr->index_to_palette[j]]
+ = png_ptr->palette_to_index[num_new_palette];
+
+ png_ptr->index_to_palette[j] =
+ (png_byte)num_new_palette;
+
+ png_ptr->palette_to_index[num_new_palette] =
+ (png_byte)j;
+ }
+ if (num_new_palette <= maximum_colors)
+ break;
+ }
+ if (num_new_palette <= maximum_colors)
+ break;
+ }
+ }
+
+ for (i = 0; i < 769; i++)
+ {
+ if (hash[i] != NULL)
+ {
+ png_dsortp p = hash[i];
+ while (p)
+ {
+ t = p->next;
+ png_free(png_ptr, p);
+ p = t;
+ }
+ }
+ hash[i] = 0;
+ }
+ max_d += 96;
+ }
+ png_free(png_ptr, hash);
+ png_free(png_ptr, png_ptr->palette_to_index);
+ png_free(png_ptr, png_ptr->index_to_palette);
+ png_ptr->palette_to_index = NULL;
+ png_ptr->index_to_palette = NULL;
+ }
+ num_palette = maximum_colors;
+ }
+ if (png_ptr->palette == NULL)
+ {
+ png_ptr->palette = palette;
+ }
+ png_ptr->num_palette = (png_uint_16)num_palette;
+
+ if (full_quantize)
+ {
+ int i;
+ png_bytep distance;
+ int total_bits = PNG_QUANTIZE_RED_BITS + PNG_QUANTIZE_GREEN_BITS +
+ PNG_QUANTIZE_BLUE_BITS;
+ int num_red = (1 << PNG_QUANTIZE_RED_BITS);
+ int num_green = (1 << PNG_QUANTIZE_GREEN_BITS);
+ int num_blue = (1 << PNG_QUANTIZE_BLUE_BITS);
+ png_size_t num_entries = ((png_size_t)1 << total_bits);
+
+ png_ptr->palette_lookup = (png_bytep)png_calloc(png_ptr,
+ (png_uint_32)(num_entries * png_sizeof(png_byte)));
+
+ distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries *
+ png_sizeof(png_byte)));
+
+ png_memset(distance, 0xff, num_entries * png_sizeof(png_byte));
+
+ for (i = 0; i < num_palette; i++)
+ {
+ int ir, ig, ib;
+ int r = (palette[i].red >> (8 - PNG_QUANTIZE_RED_BITS));
+ int g = (palette[i].green >> (8 - PNG_QUANTIZE_GREEN_BITS));
+ int b = (palette[i].blue >> (8 - PNG_QUANTIZE_BLUE_BITS));
+
+ for (ir = 0; ir < num_red; ir++)
+ {
+ /* int dr = abs(ir - r); */
+ int dr = ((ir > r) ? ir - r : r - ir);
+ int index_r = (ir << (PNG_QUANTIZE_BLUE_BITS +
+ PNG_QUANTIZE_GREEN_BITS));
+
+ for (ig = 0; ig < num_green; ig++)
+ {
+ /* int dg = abs(ig - g); */
+ int dg = ((ig > g) ? ig - g : g - ig);
+ int dt = dr + dg;
+ int dm = ((dr > dg) ? dr : dg);
+ int index_g = index_r | (ig << PNG_QUANTIZE_BLUE_BITS);
+
+ for (ib = 0; ib < num_blue; ib++)
+ {
+ int d_index = index_g | ib;
+ /* int db = abs(ib - b); */
+ int db = ((ib > b) ? ib - b : b - ib);
+ int dmax = ((dm > db) ? dm : db);
+ int d = dmax + dt + db;
+
+ if (d < (int)distance[d_index])
+ {
+ distance[d_index] = (png_byte)d;
+ png_ptr->palette_lookup[d_index] = (png_byte)i;
+ }
+ }
+ }
+ }
+ }
+
+ png_free(png_ptr, distance);
+ }
+}
+#endif /* PNG_READ_QUANTIZE_SUPPORTED */
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+/* Transform the image from the file_gamma to the screen_gamma. We
+ * only do transformations on images where the file_gamma and screen_gamma
+ * are not close reciprocals, otherwise it slows things down slightly, and
+ * also needlessly introduces small errors.
+ *
+ * We will turn off gamma transformation later if no semitransparent entries
+ * are present in the tRNS array for palette images. We can't do it here
+ * because we don't necessarily have the tRNS chunk yet.
+ */
+static int /* PRIVATE */
+png_gamma_threshold(png_fixed_point scrn_gamma, png_fixed_point file_gamma)
+{
+ /* PNG_GAMMA_THRESHOLD is the threshold for performing gamma
+ * correction as a difference of the overall transform from 1.0
+ *
+ * We want to compare the threshold with s*f - 1, if we get
+ * overflow here it is because of wacky gamma values so we
+ * turn on processing anyway.
+ */
+ png_fixed_point gtest;
+ return !png_muldiv(>est, scrn_gamma, file_gamma, PNG_FP_1) ||
+ png_gamma_significant(gtest);
+}
+
+void PNGFAPI
+png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma,
+ png_fixed_point file_gamma)
+{
+ png_debug(1, "in png_set_gamma_fixed");
+
+ if (png_ptr == NULL)
+ return;
+
+ if ((png_ptr->color_type & PNG_COLOR_MASK_ALPHA) ||
+ (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
+ png_gamma_threshold(scrn_gamma, file_gamma))
+ png_ptr->transformations |= PNG_GAMMA;
+ png_ptr->gamma = file_gamma;
+ png_ptr->screen_gamma = scrn_gamma;
+}
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
+{
+ png_set_gamma_fixed(png_ptr,
+ png_fixed(png_ptr, scrn_gamma, "png_set_gamma screen gamma"),
+ png_fixed(png_ptr, file_gamma, "png_set_gamma file gamma"));
+}
+# endif /* FLOATING_POINT_SUPPORTED */
+#endif /* READ_GAMMA */
+
+#ifdef PNG_READ_EXPAND_SUPPORTED
+/* Expand paletted images to RGB, expand grayscale images of
+ * less than 8-bit depth to 8-bit depth, and expand tRNS chunks
+ * to alpha channels.
+ */
+void PNGAPI
+png_set_expand(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_expand");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
+}
+
+/* GRR 19990627: the following three functions currently are identical
+ * to png_set_expand(). However, it is entirely reasonable that someone
+ * might wish to expand an indexed image to RGB but *not* expand a single,
+ * fully transparent palette entry to a full alpha channel--perhaps instead
+ * convert tRNS to the grayscale/RGB format (16-bit RGB value), or replace
+ * the transparent color with a particular RGB value, or drop tRNS entirely.
+ * IOW, a future version of the library may make the transformations flag
+ * a bit more fine-grained, with separate bits for each of these three
+ * functions.
+ *
+ * More to the point, these functions make it obvious what libpng will be
+ * doing, whereas "expand" can (and does) mean any number of things.
+ *
+ * GRP 20060307: In libpng-1.2.9, png_set_gray_1_2_4_to_8() was modified
+ * to expand only the sample depth but not to expand the tRNS to alpha
+ * and its name was changed to png_set_expand_gray_1_2_4_to_8().
+ */
+
+/* Expand paletted images to RGB. */
+void PNGAPI
+png_set_palette_to_rgb(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_palette_to_rgb");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
+}
+
+/* Expand grayscale images of less than 8-bit depth to 8 bits. */
+void PNGAPI
+png_set_expand_gray_1_2_4_to_8(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_expand_gray_1_2_4_to_8");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_EXPAND;
+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
+}
+
+
+
+/* Expand tRNS chunks to alpha channels. */
+void PNGAPI
+png_set_tRNS_to_alpha(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_tRNS_to_alpha");
+
+ png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
+}
+#endif /* defined(PNG_READ_EXPAND_SUPPORTED) */
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+/* Expand to 16 bit channels, expand the tRNS chunk too (because otherwise
+ * it may not work correctly.)
+ */
+void PNGAPI
+png_set_expand_16(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_expand_16");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= (PNG_EXPAND_16 | PNG_EXPAND | PNG_EXPAND_tRNS);
+ png_ptr->transformations &= ~PNG_16_TO_8;
+
+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
+}
+#endif
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+void PNGAPI
+png_set_gray_to_rgb(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_gray_to_rgb");
+
+ if (png_ptr != NULL)
+ {
+ /* Because rgb must be 8 bits or more: */
+ png_set_expand_gray_1_2_4_to_8(png_ptr);
+ png_ptr->transformations |= PNG_GRAY_TO_RGB;
+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
+ }
+}
+#endif
+
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+void PNGFAPI
+png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
+ png_fixed_point red, png_fixed_point green)
+{
+ png_debug(1, "in png_set_rgb_to_gray");
+
+ if (png_ptr == NULL)
+ return;
+
+ switch(error_action)
+ {
+ case 1:
+ png_ptr->transformations |= PNG_RGB_TO_GRAY;
+ break;
+
+ case 2:
+ png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN;
+ break;
+
+ case 3:
+ png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR;
+ break;
+
+ default:
+ png_error(png_ptr, "invalid error action to rgb_to_gray");
+ break;
+ }
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+#ifdef PNG_READ_EXPAND_SUPPORTED
+ png_ptr->transformations |= PNG_EXPAND;
+#else
+ {
+ png_warning(png_ptr,
+ "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED");
+
+ png_ptr->transformations &= ~PNG_RGB_TO_GRAY;
+ }
+#endif
+ {
+ png_uint_16 red_int, green_int;
+ if (red < 0 || green < 0)
+ {
+ red_int = 6968; /* .212671 * 32768 + .5 */
+ green_int = 23434; /* .715160 * 32768 + .5 */
+ }
+
+ else if (red + green < 100000L)
+ {
+ red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L);
+ green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L);
+ }
+
+ else
+ {
+ png_warning(png_ptr, "ignoring out of range rgb_to_gray coefficients");
+ red_int = 6968;
+ green_int = 23434;
+ }
+
+ png_ptr->rgb_to_gray_red_coeff = red_int;
+ png_ptr->rgb_to_gray_green_coeff = green_int;
+ png_ptr->rgb_to_gray_blue_coeff =
+ (png_uint_16)(32768 - red_int - green_int);
+ }
+}
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+/* Convert a RGB image to a grayscale of the same width. This allows us,
+ * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image.
+ */
+
+void PNGAPI
+png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red,
+ double green)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_set_rgb_to_gray_fixed(png_ptr, error_action,
+ png_fixed(png_ptr, red, "rgb to gray red coefficient"),
+ png_fixed(png_ptr, green, "rgb to gray green coefficient"));
+}
+#endif /* FLOATING POINT */
+
+#endif
+
+#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
+ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+void PNGAPI
+png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
+ read_user_transform_fn)
+{
+ png_debug(1, "in png_set_read_user_transform_fn");
+
+ if (png_ptr == NULL)
+ return;
+
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+ png_ptr->transformations |= PNG_USER_TRANSFORM;
+ png_ptr->read_user_transform_fn = read_user_transform_fn;
+#endif
+}
+#endif
+
+/* Initialize everything needed for the read. This includes modifying
+ * the palette.
+ */
+void /* PRIVATE */
+png_init_read_transformations(png_structp png_ptr)
+{
+ png_debug(1, "in png_init_read_transformations");
+
+ {
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
+ defined(PNG_READ_SHIFT_SUPPORTED) || \
+ defined(PNG_READ_GAMMA_SUPPORTED)
+ int color_type = png_ptr->color_type;
+#endif
+
+#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED)
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+ /* Detect gray background and attempt to enable optimization
+ * for gray --> RGB case
+ *
+ * Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or
+ * RGB_ALPHA (in which case need_expand is superfluous anyway), the
+ * background color might actually be gray yet not be flagged as such.
+ * This is not a problem for the current code, which uses
+ * PNG_BACKGROUND_IS_GRAY only to decide when to do the
+ * png_do_gray_to_rgb() transformation.
+ */
+ if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
+ !(color_type & PNG_COLOR_MASK_COLOR))
+ {
+ png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
+ }
+
+ else if ((png_ptr->transformations & PNG_BACKGROUND) &&
+ !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
+ (png_ptr->transformations & PNG_GRAY_TO_RGB) &&
+ png_ptr->background.red == png_ptr->background.green &&
+ png_ptr->background.red == png_ptr->background.blue)
+ {
+ png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
+ png_ptr->background.gray = png_ptr->background.red;
+ }
+#endif
+
+ if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
+ (png_ptr->transformations & PNG_EXPAND))
+ {
+ if (!(color_type & PNG_COLOR_MASK_COLOR)) /* i.e., GRAY or GRAY_ALPHA */
+ {
+ /* Expand background and tRNS chunks */
+ switch (png_ptr->bit_depth)
+ {
+ case 1:
+ png_ptr->background.gray *= (png_uint_16)0xff;
+ png_ptr->background.red = png_ptr->background.green
+ = png_ptr->background.blue = png_ptr->background.gray;
+ if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
+ {
+ png_ptr->trans_color.gray *= (png_uint_16)0xff;
+ png_ptr->trans_color.red = png_ptr->trans_color.green
+ = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
+ }
+ break;
+
+ case 2:
+ png_ptr->background.gray *= (png_uint_16)0x55;
+ png_ptr->background.red = png_ptr->background.green
+ = png_ptr->background.blue = png_ptr->background.gray;
+ if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
+ {
+ png_ptr->trans_color.gray *= (png_uint_16)0x55;
+ png_ptr->trans_color.red = png_ptr->trans_color.green
+ = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
+ }
+ break;
+
+ case 4:
+ png_ptr->background.gray *= (png_uint_16)0x11;
+ png_ptr->background.red = png_ptr->background.green
+ = png_ptr->background.blue = png_ptr->background.gray;
+ if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
+ {
+ png_ptr->trans_color.gray *= (png_uint_16)0x11;
+ png_ptr->trans_color.red = png_ptr->trans_color.green
+ = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
+ }
+ break;
+
+ default:
+
+ case 8:
+
+ case 16:
+ png_ptr->background.red = png_ptr->background.green
+ = png_ptr->background.blue = png_ptr->background.gray;
+ break;
+ }
+ }
+ else if (color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ png_ptr->background.red =
+ png_ptr->palette[png_ptr->background.index].red;
+ png_ptr->background.green =
+ png_ptr->palette[png_ptr->background.index].green;
+ png_ptr->background.blue =
+ png_ptr->palette[png_ptr->background.index].blue;
+
+#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
+ if (png_ptr->transformations & PNG_INVERT_ALPHA)
+ {
+#ifdef PNG_READ_EXPAND_SUPPORTED
+ if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
+#endif
+ {
+ /* Invert the alpha channel (in tRNS) unless the pixels are
+ * going to be expanded, in which case leave it for later
+ */
+ int i, istop;
+ istop=(int)png_ptr->num_trans;
+ for (i=0; i<istop; i++)
+ png_ptr->trans_alpha[i] = (png_byte)(255 -
+ png_ptr->trans_alpha[i]);
+ }
+ }
+#endif
+
+ }
+ }
+#endif
+
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
+ png_ptr->background_1 = png_ptr->background;
+#endif
+#ifdef PNG_READ_GAMMA_SUPPORTED
+
+ if ((color_type == PNG_COLOR_TYPE_PALETTE && png_ptr->num_trans != 0)
+ && png_gamma_threshold(png_ptr->screen_gamma, png_ptr->gamma))
+ {
+ int i, k;
+ k=0;
+ for (i=0; i<png_ptr->num_trans; i++)
+ {
+ if (png_ptr->trans_alpha[i] != 0 && png_ptr->trans_alpha[i] != 0xff)
+ k=1; /* Partial transparency is present */
+ }
+ if (k == 0)
+ png_ptr->transformations &= ~PNG_GAMMA;
+ }
+
+ if ((png_ptr->transformations & (PNG_GAMMA | PNG_RGB_TO_GRAY)) &&
+ png_ptr->gamma != 0)
+ {
+ png_build_gamma_table(png_ptr, png_ptr->bit_depth);
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+ if (png_ptr->transformations & PNG_BACKGROUND)
+ {
+ if (color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ /* Could skip if no transparency */
+ png_color back, back_1;
+ png_colorp palette = png_ptr->palette;
+ int num_palette = png_ptr->num_palette;
+ int i;
+ if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE)
+ {
+
+ back.red = png_ptr->gamma_table[png_ptr->background.red];
+ back.green = png_ptr->gamma_table[png_ptr->background.green];
+ back.blue = png_ptr->gamma_table[png_ptr->background.blue];
+
+ back_1.red = png_ptr->gamma_to_1[png_ptr->background.red];
+ back_1.green = png_ptr->gamma_to_1[png_ptr->background.green];
+ back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue];
+ }
+ else
+ {
+ png_fixed_point g, gs;
+
+ switch (png_ptr->background_gamma_type)
+ {
+ case PNG_BACKGROUND_GAMMA_SCREEN:
+ g = (png_ptr->screen_gamma);
+ gs = PNG_FP_1;
+ break;
+
+ case PNG_BACKGROUND_GAMMA_FILE:
+ g = png_reciprocal(png_ptr->gamma);
+ gs = png_reciprocal2(png_ptr->gamma,
+ png_ptr->screen_gamma);
+ break;
+
+ case PNG_BACKGROUND_GAMMA_UNIQUE:
+ g = png_reciprocal(png_ptr->background_gamma);
+ gs = png_reciprocal2(png_ptr->background_gamma,
+ png_ptr->screen_gamma);
+ break;
+ default:
+ g = PNG_FP_1; /* back_1 */
+ gs = PNG_FP_1; /* back */
+ break;
+ }
+
+ if (png_gamma_significant(gs))
+ {
+ back.red = (png_byte)png_ptr->background.red;
+ back.green = (png_byte)png_ptr->background.green;
+ back.blue = (png_byte)png_ptr->background.blue;
+ }
+
+ else
+ {
+ back.red = png_gamma_8bit_correct(png_ptr->background.red,
+ gs);
+ back.green = png_gamma_8bit_correct(png_ptr->background.green,
+ gs);
+ back.blue = png_gamma_8bit_correct(png_ptr->background.blue,
+ gs);
+ }
+ back_1.red = png_gamma_8bit_correct(png_ptr->background.red, g);
+ back_1.green = png_gamma_8bit_correct(png_ptr->background.green,
+ g);
+ back_1.blue = png_gamma_8bit_correct(png_ptr->background.blue,
+ g);
+ }
+ for (i = 0; i < num_palette; i++)
+ {
+ if (i < (int)png_ptr->num_trans &&
+ png_ptr->trans_alpha[i] != 0xff)
+ {
+ if (png_ptr->trans_alpha[i] == 0)
+ {
+ palette[i] = back;
+ }
+ else /* if (png_ptr->trans_alpha[i] != 0xff) */
+ {
+ png_byte v, w;
+
+ v = png_ptr->gamma_to_1[palette[i].red];
+ png_composite(w, v, png_ptr->trans_alpha[i], back_1.red);
+ palette[i].red = png_ptr->gamma_from_1[w];
+
+ v = png_ptr->gamma_to_1[palette[i].green];
+ png_composite(w, v, png_ptr->trans_alpha[i], back_1.green);
+ palette[i].green = png_ptr->gamma_from_1[w];
+
+ v = png_ptr->gamma_to_1[palette[i].blue];
+ png_composite(w, v, png_ptr->trans_alpha[i], back_1.blue);
+ palette[i].blue = png_ptr->gamma_from_1[w];
+ }
+ }
+ else
+ {
+ palette[i].red = png_ptr->gamma_table[palette[i].red];
+ palette[i].green = png_ptr->gamma_table[palette[i].green];
+ palette[i].blue = png_ptr->gamma_table[palette[i].blue];
+ }
+ }
+ /* Prevent the transformations being done again, and make sure
+ * that the now spurious alpha channel is stripped - the code
+ * has just reduced background composition and gamma correction
+ * to a simple alpha channel strip.
+ */
+ png_ptr->transformations &= ~PNG_BACKGROUND;
+ png_ptr->transformations &= ~PNG_GAMMA;
+ png_ptr->transformations |= PNG_STRIP_ALPHA;
+ }
+
+ /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */
+ else
+ /* color_type != PNG_COLOR_TYPE_PALETTE */
+ {
+ png_fixed_point g = PNG_FP_1;
+ png_fixed_point gs = PNG_FP_1;
+
+ switch (png_ptr->background_gamma_type)
+ {
+ case PNG_BACKGROUND_GAMMA_SCREEN:
+ g = png_ptr->screen_gamma;
+ /* gs = PNG_FP_1; */
+ break;
+
+ case PNG_BACKGROUND_GAMMA_FILE:
+ g = png_reciprocal(png_ptr->gamma);
+ gs = png_reciprocal2(png_ptr->gamma, png_ptr->screen_gamma);
+ break;
+
+ case PNG_BACKGROUND_GAMMA_UNIQUE:
+ g = png_reciprocal(png_ptr->background_gamma);
+ gs = png_reciprocal2(png_ptr->background_gamma,
+ png_ptr->screen_gamma);
+ break;
+
+ default:
+ png_error(png_ptr, "invalid background gamma type");
+ }
+
+ png_ptr->background_1.gray = png_gamma_correct(png_ptr,
+ png_ptr->background.gray, g);
+
+ png_ptr->background.gray = png_gamma_correct(png_ptr,
+ png_ptr->background.gray, gs);
+
+ if ((png_ptr->background.red != png_ptr->background.green) ||
+ (png_ptr->background.red != png_ptr->background.blue) ||
+ (png_ptr->background.red != png_ptr->background.gray))
+ {
+ /* RGB or RGBA with color background */
+ png_ptr->background_1.red = png_gamma_correct(png_ptr,
+ png_ptr->background.red, g);
+
+ png_ptr->background_1.green = png_gamma_correct(png_ptr,
+ png_ptr->background.green, g);
+
+ png_ptr->background_1.blue = png_gamma_correct(png_ptr,
+ png_ptr->background.blue, g);
+
+ png_ptr->background.red = png_gamma_correct(png_ptr,
+ png_ptr->background.red, gs);
+
+ png_ptr->background.green = png_gamma_correct(png_ptr,
+ png_ptr->background.green, gs);
+
+ png_ptr->background.blue = png_gamma_correct(png_ptr,
+ png_ptr->background.blue, gs);
+ }
+
+ else
+ {
+ /* GRAY, GRAY ALPHA, RGB, or RGBA with gray background */
+ png_ptr->background_1.red = png_ptr->background_1.green
+ = png_ptr->background_1.blue = png_ptr->background_1.gray;
+
+ png_ptr->background.red = png_ptr->background.green
+ = png_ptr->background.blue = png_ptr->background.gray;
+ }
+ }
+ }
+ else
+ /* Transformation does not include PNG_BACKGROUND */
+#endif /* PNG_READ_BACKGROUND_SUPPORTED */
+ if (color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ png_colorp palette = png_ptr->palette;
+ int num_palette = png_ptr->num_palette;
+ int i;
+
+ for (i = 0; i < num_palette; i++)
+ {
+ palette[i].red = png_ptr->gamma_table[palette[i].red];
+ palette[i].green = png_ptr->gamma_table[palette[i].green];
+ palette[i].blue = png_ptr->gamma_table[palette[i].blue];
+ }
+
+ /* Done the gamma correction. */
+ png_ptr->transformations &= ~PNG_GAMMA;
+ }
+ }
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+ else
+#endif
+#endif /* PNG_READ_GAMMA_SUPPORTED */
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+ /* No GAMMA transformation */
+ if ((png_ptr->transformations & PNG_BACKGROUND) &&
+ (color_type == PNG_COLOR_TYPE_PALETTE))
+ {
+ int i;
+ int istop = (int)png_ptr->num_trans;
+ png_color back;
+ png_colorp palette = png_ptr->palette;
+
+ back.red = (png_byte)png_ptr->background.red;
+ back.green = (png_byte)png_ptr->background.green;
+ back.blue = (png_byte)png_ptr->background.blue;
+
+ for (i = 0; i < istop; i++)
+ {
+ if (png_ptr->trans_alpha[i] == 0)
+ {
+ palette[i] = back;
+ }
+
+ else if (png_ptr->trans_alpha[i] != 0xff)
+ {
+ /* The png_composite() macro is defined in png.h */
+ png_composite(palette[i].red, palette[i].red,
+ png_ptr->trans_alpha[i], back.red);
+
+ png_composite(palette[i].green, palette[i].green,
+ png_ptr->trans_alpha[i], back.green);
+
+ png_composite(palette[i].blue, palette[i].blue,
+ png_ptr->trans_alpha[i], back.blue);
+ }
+ }
+
+ /* Handled alpha, still need to strip the channel. */
+ png_ptr->transformations &= ~PNG_BACKGROUND;
+ png_ptr->transformations |= PNG_STRIP_ALPHA;
+ }
+#endif /* PNG_READ_BACKGROUND_SUPPORTED */
+
+#ifdef PNG_READ_SHIFT_SUPPORTED
+ if ((png_ptr->transformations & PNG_SHIFT) &&
+ (color_type == PNG_COLOR_TYPE_PALETTE))
+ {
+ png_uint_16 i;
+ png_uint_16 istop = png_ptr->num_palette;
+ int sr = 8 - png_ptr->sig_bit.red;
+ int sg = 8 - png_ptr->sig_bit.green;
+ int sb = 8 - png_ptr->sig_bit.blue;
+
+ if (sr < 0 || sr > 8)
+ sr = 0;
+
+ if (sg < 0 || sg > 8)
+ sg = 0;
+
+ if (sb < 0 || sb > 8)
+ sb = 0;
+
+ for (i = 0; i < istop; i++)
+ {
+ png_ptr->palette[i].red >>= sr;
+ png_ptr->palette[i].green >>= sg;
+ png_ptr->palette[i].blue >>= sb;
+ }
+ }
+#endif /* PNG_READ_SHIFT_SUPPORTED */
+ }
+#if !defined(PNG_READ_GAMMA_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) \
+ && !defined(PNG_READ_BACKGROUND_SUPPORTED)
+ if (png_ptr)
+ return;
+#endif
+}
+
+/* Modify the info structure to reflect the transformations. The
+ * info should be updated so a PNG file could be written with it,
+ * assuming the transformations result in valid PNG data.
+ */
+void /* PRIVATE */
+png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
+{
+ png_debug(1, "in png_read_transform_info");
+
+#ifdef PNG_READ_EXPAND_SUPPORTED
+ if (png_ptr->transformations & PNG_EXPAND)
+ {
+ if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (png_ptr->num_trans &&
+ (png_ptr->transformations & PNG_EXPAND_tRNS))
+ info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+
+ else
+ info_ptr->color_type = PNG_COLOR_TYPE_RGB;
+
+ info_ptr->bit_depth = 8;
+ info_ptr->num_trans = 0;
+ }
+ else
+ {
+ if (png_ptr->num_trans)
+ {
+ if (png_ptr->transformations & PNG_EXPAND_tRNS)
+ info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
+ }
+ if (info_ptr->bit_depth < 8)
+ info_ptr->bit_depth = 8;
+
+ info_ptr->num_trans = 0;
+ }
+ }
+#endif
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+ if (png_ptr->transformations & PNG_EXPAND_16 && info_ptr->bit_depth == 8 &&
+ info_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
+ {
+ info_ptr->bit_depth = 16;
+ }
+#endif
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+ if (png_ptr->transformations & PNG_BACKGROUND)
+ {
+ info_ptr->color_type = (png_byte)(info_ptr->color_type &
+ ~PNG_COLOR_MASK_ALPHA);
+ info_ptr->num_trans = 0;
+ info_ptr->background = png_ptr->background;
+ }
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (png_ptr->transformations & PNG_GAMMA)
+ {
+ info_ptr->gamma = png_ptr->gamma;
+ }
+#endif
+
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+#ifdef PNG_READ_16BIT_SUPPORTED
+ if ((png_ptr->transformations & PNG_16_TO_8) && (info_ptr->bit_depth == 16))
+ info_ptr->bit_depth = 8;
+#else
+ /* Force chopping 16-bit input down to 8 */
+ if (info_ptr->bit_depth == 16)
+ {
+ png_ptr->transformations |=PNG_16_TO_8;
+ info_ptr->bit_depth = 8;
+ }
+#endif
+#endif
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+ if (png_ptr->transformations & PNG_GRAY_TO_RGB)
+ info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
+#endif
+
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+ if (png_ptr->transformations & PNG_RGB_TO_GRAY)
+ info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR;
+#endif
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+ if (png_ptr->transformations & PNG_QUANTIZE)
+ {
+ if (((info_ptr->color_type == PNG_COLOR_TYPE_RGB) ||
+ (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) &&
+ png_ptr->palette_lookup && info_ptr->bit_depth == 8)
+ {
+ info_ptr->color_type = PNG_COLOR_TYPE_PALETTE;
+ }
+ }
+#endif
+
+#ifdef PNG_READ_PACK_SUPPORTED
+ if ((png_ptr->transformations & PNG_PACK) && (info_ptr->bit_depth < 8))
+ info_ptr->bit_depth = 8;
+#endif
+
+ if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ info_ptr->channels = 1;
+
+ else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
+ info_ptr->channels = 3;
+
+ else
+ info_ptr->channels = 1;
+
+#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
+ if (png_ptr->transformations & PNG_STRIP_ALPHA)
+ info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
+#endif
+
+ if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
+ info_ptr->channels++;
+
+#ifdef PNG_READ_FILLER_SUPPORTED
+ /* STRIP_ALPHA and FILLER allowed: MASK_ALPHA bit stripped above */
+ if ((png_ptr->transformations & PNG_FILLER) &&
+ ((info_ptr->color_type == PNG_COLOR_TYPE_RGB) ||
+ (info_ptr->color_type == PNG_COLOR_TYPE_GRAY)))
+ {
+ info_ptr->channels++;
+ /* If adding a true alpha channel not just filler */
+ if (png_ptr->transformations & PNG_ADD_ALPHA)
+ info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
+ }
+#endif
+
+#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \
+defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
+ if (png_ptr->transformations & PNG_USER_TRANSFORM)
+ {
+ if (info_ptr->bit_depth < png_ptr->user_transform_depth)
+ info_ptr->bit_depth = png_ptr->user_transform_depth;
+
+ if (info_ptr->channels < png_ptr->user_transform_channels)
+ info_ptr->channels = png_ptr->user_transform_channels;
+ }
+#endif
+
+ info_ptr->pixel_depth = (png_byte)(info_ptr->channels *
+ info_ptr->bit_depth);
+
+ info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, info_ptr->width);
+
+#ifndef PNG_READ_EXPAND_SUPPORTED
+ if (png_ptr)
+ return;
+#endif
+}
+
+/* Transform the row. The order of transformations is significant,
+ * and is very touchy. If you add a transformation, take care to
+ * decide how it fits in with the other transformations here.
+ */
+void /* PRIVATE */
+png_do_read_transformations(png_structp png_ptr)
+{
+ png_debug(1, "in png_do_read_transformations");
+
+ if (png_ptr->row_buf == NULL)
+ {
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ char msg[50];
+
+ png_snprintf2(msg, 50,
+ "NULL row buffer for row %ld, pass %d", (long)png_ptr->row_number,
+ png_ptr->pass);
+ png_error(png_ptr, msg);
+#else
+ png_error(png_ptr, "NULL row buffer");
+#endif
+ }
+#ifdef PNG_WARN_UNINITIALIZED_ROW
+ if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
+ /* Application has failed to call either png_read_start_image()
+ * or png_read_update_info() after setting transforms that expand
+ * pixels. This check added to libpng-1.2.19
+ */
+#if (PNG_WARN_UNINITIALIZED_ROW==1)
+ png_error(png_ptr, "Uninitialized row");
+#else
+ png_warning(png_ptr, "Uninitialized row");
+#endif
+#endif
+
+#ifdef PNG_READ_EXPAND_SUPPORTED
+ if (png_ptr->transformations & PNG_EXPAND)
+ {
+ if (png_ptr->row_info.color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ png_do_expand_palette(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
+ }
+
+ else
+ {
+ if (png_ptr->num_trans &&
+ (png_ptr->transformations & PNG_EXPAND_tRNS))
+ png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ &(png_ptr->trans_color));
+
+ else
+ png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ NULL);
+ }
+ }
+#endif
+
+ /* Delay the 'expand 16' step until later for efficiency, so that the
+ * intermediate steps work with 8 bit data.
+ */
+
+#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
+ if ((png_ptr->transformations & PNG_STRIP_ALPHA) &&
+ (png_ptr->row_info.color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
+ png_ptr->row_info.color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
+ png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ 0/*!at_start, because SWAP_ALPHA happens later*/);
+#endif
+
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+ if (png_ptr->transformations & PNG_RGB_TO_GRAY)
+ {
+ int rgb_error =
+ png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info),
+ png_ptr->row_buf + 1);
+
+ if (rgb_error)
+ {
+ png_ptr->rgb_to_gray_status=1;
+ if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
+ PNG_RGB_TO_GRAY_WARN)
+ png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel");
+
+ if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
+ PNG_RGB_TO_GRAY_ERR)
+ png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel");
+ }
+ }
+#endif
+
+/* From Andreas Dilger e-mail to png-implement, 26 March 1998:
+ *
+ * In most cases, the "simple transparency" should be done prior to doing
+ * gray-to-RGB, or you will have to test 3x as many bytes to check if a
+ * pixel is transparent. You would also need to make sure that the
+ * transparency information is upgraded to RGB.
+ *
+ * To summarize, the current flow is:
+ * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite
+ * with background "in place" if transparent,
+ * convert to RGB if necessary
+ * - Gray + alpha -> composite with gray background and remove alpha bytes,
+ * convert to RGB if necessary
+ *
+ * To support RGB backgrounds for gray images we need:
+ * - Gray + simple transparency -> convert to RGB + simple transparency,
+ * compare 3 or 6 bytes and composite with
+ * background "in place" if transparent
+ * (3x compare/pixel compared to doing
+ * composite with gray bkgrnd)
+ * - Gray + alpha -> convert to RGB + alpha, composite with background and
+ * remove alpha bytes (3x float
+ * operations/pixel compared with composite
+ * on gray background)
+ *
+ * Greg's change will do this. The reason it wasn't done before is for
+ * performance, as this increases the per-pixel operations. If we would check
+ * in advance if the background was gray or RGB, and position the gray-to-RGB
+ * transform appropriately, then it would save a lot of work/time.
+ */
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+ /* If gray -> RGB, do so now only if background is non-gray; else do later
+ * for performance reasons
+ */
+ if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
+ !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
+ png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+ if ((png_ptr->transformations & PNG_BACKGROUND) &&
+ ((png_ptr->num_trans != 0) ||
+ (png_ptr->color_type & PNG_COLOR_MASK_ALPHA)))
+ png_do_background(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ &(png_ptr->trans_color), &(png_ptr->background)
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ , &(png_ptr->background_1),
+ png_ptr->gamma_table, png_ptr->gamma_from_1,
+ png_ptr->gamma_to_1, png_ptr->gamma_16_table,
+ png_ptr->gamma_16_from_1, png_ptr->gamma_16_to_1,
+ png_ptr->gamma_shift
+#endif
+ );
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if ((png_ptr->transformations & PNG_GAMMA) &&
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+ !((png_ptr->transformations & PNG_BACKGROUND) &&
+ ((png_ptr->num_trans != 0) ||
+ (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) &&
+#endif
+ (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE))
+ png_do_gamma(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_ptr->gamma_table, png_ptr->gamma_16_table,
+ png_ptr->gamma_shift);
+#endif
+
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+ if (png_ptr->transformations & PNG_16_TO_8)
+ png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+ if (png_ptr->transformations & PNG_QUANTIZE)
+ {
+ png_do_quantize(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_ptr->palette_lookup, png_ptr->quantize_index);
+
+ if (png_ptr->row_info.rowbytes == 0)
+ png_error(png_ptr, "png_do_quantize returned rowbytes=0");
+ }
+#endif /* PNG_READ_QUANTIZE_SUPPORTED */
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+ /* Do the expansion now, after all the arithmetic has been done. Notice
+ * that previous transformations can handle the PNG_EXPAND_16 flag if this
+ * is efficient (particularly true in the case of gamma correction, where
+ * better accuracy results faster!)
+ */
+ if (png_ptr->transformations & PNG_EXPAND_16)
+ png_do_expand_16(&png_ptr->row_info, png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_INVERT_SUPPORTED
+ if (png_ptr->transformations & PNG_INVERT_MONO)
+ png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_SHIFT_SUPPORTED
+ if (png_ptr->transformations & PNG_SHIFT)
+ png_do_unshift(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ &(png_ptr->shift));
+#endif
+
+#ifdef PNG_READ_PACK_SUPPORTED
+ if (png_ptr->transformations & PNG_PACK)
+ png_do_unpack(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_BGR_SUPPORTED
+ if (png_ptr->transformations & PNG_BGR)
+ png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
+ if (png_ptr->transformations & PNG_PACKSWAP)
+ png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+ /*NOTE: this must be in the wrong place - what happens if BGR is set too?
+ * Need pngvalid to test this combo.
+ */
+ /* If gray -> RGB, do so now only if we did not do so above */
+ if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
+ (png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
+ png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_FILLER_SUPPORTED
+ if (png_ptr->transformations & PNG_FILLER)
+ png_do_read_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ (png_uint_32)png_ptr->filler, png_ptr->flags);
+#endif
+
+#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
+ if (png_ptr->transformations & PNG_INVERT_ALPHA)
+ png_do_read_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
+ if (png_ptr->transformations & PNG_SWAP_ALPHA)
+ png_do_read_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+#ifdef PNG_READ_SWAP_SUPPORTED
+ if (png_ptr->transformations & PNG_SWAP_BYTES)
+ png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+#endif
+
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+ if (png_ptr->transformations & PNG_USER_TRANSFORM)
+ {
+ if (png_ptr->read_user_transform_fn != NULL)
+ (*(png_ptr->read_user_transform_fn)) /* User read transform function */
+ (png_ptr, /* png_ptr */
+ &(png_ptr->row_info), /* row_info: */
+ /* png_uint_32 width; width of row */
+ /* png_size_t rowbytes; number of bytes in row */
+ /* png_byte color_type; color type of pixels */
+ /* png_byte bit_depth; bit depth of samples */
+ /* png_byte channels; number of channels (1-4) */
+ /* png_byte pixel_depth; bits per pixel (depth*channels) */
+ png_ptr->row_buf + 1); /* start of pixel data for row */
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
+ if (png_ptr->user_transform_depth)
+ png_ptr->row_info.bit_depth = png_ptr->user_transform_depth;
+
+ if (png_ptr->user_transform_channels)
+ png_ptr->row_info.channels = png_ptr->user_transform_channels;
+#endif
+ png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
+ png_ptr->row_info.channels);
+
+ png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
+ png_ptr->row_info.width);
+ }
+#endif
+
+}
+
+#ifdef PNG_READ_PACK_SUPPORTED
+/* Unpack pixels of 1, 2, or 4 bits per pixel into 1 byte per pixel,
+ * without changing the actual values. Thus, if you had a row with
+ * a bit depth of 1, you would end up with bytes that only contained
+ * the numbers 0 or 1. If you would rather they contain 0 and 255, use
+ * png_do_shift() after this.
+ */
+void /* PRIVATE */
+png_do_unpack(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_unpack");
+
+ if (row_info->bit_depth < 8)
+ {
+ png_uint_32 i;
+ png_uint_32 row_width=row_info->width;
+
+ switch (row_info->bit_depth)
+ {
+ case 1:
+ {
+ png_bytep sp = row + (png_size_t)((row_width - 1) >> 3);
+ png_bytep dp = row + (png_size_t)row_width - 1;
+ png_uint_32 shift = 7 - (int)((row_width + 7) & 0x07);
+ for (i = 0; i < row_width; i++)
+ {
+ *dp = (png_byte)((*sp >> shift) & 0x01);
+
+ if (shift == 7)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift++;
+
+ dp--;
+ }
+ break;
+ }
+
+ case 2:
+ {
+
+ png_bytep sp = row + (png_size_t)((row_width - 1) >> 2);
+ png_bytep dp = row + (png_size_t)row_width - 1;
+ png_uint_32 shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
+ for (i = 0; i < row_width; i++)
+ {
+ *dp = (png_byte)((*sp >> shift) & 0x03);
+
+ if (shift == 6)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift += 2;
+
+ dp--;
+ }
+ break;
+ }
+
+ case 4:
+ {
+ png_bytep sp = row + (png_size_t)((row_width - 1) >> 1);
+ png_bytep dp = row + (png_size_t)row_width - 1;
+ png_uint_32 shift = (int)((1 - ((row_width + 1) & 0x01)) << 2);
+ for (i = 0; i < row_width; i++)
+ {
+ *dp = (png_byte)((*sp >> shift) & 0x0f);
+
+ if (shift == 4)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift = 4;
+
+ dp--;
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+ row_info->bit_depth = 8;
+ row_info->pixel_depth = (png_byte)(8 * row_info->channels);
+ row_info->rowbytes = row_width * row_info->channels;
+ }
+}
+#endif
+
+#ifdef PNG_READ_SHIFT_SUPPORTED
+/* Reverse the effects of png_do_shift. This routine merely shifts the
+ * pixels back to their significant bits values. Thus, if you have
+ * a row of bit depth 8, but only 5 are significant, this will shift
+ * the values back to 0 through 31.
+ */
+void /* PRIVATE */
+png_do_unshift(png_row_infop row_info, png_bytep row,
+ png_const_color_8p sig_bits)
+{
+ png_debug(1, "in png_do_unshift");
+
+ if (
+ row_info->color_type != PNG_COLOR_TYPE_PALETTE)
+ {
+ int shift[4];
+ int channels = 0;
+ int c;
+ png_uint_16 value = 0;
+ png_uint_32 row_width = row_info->width;
+
+ if (row_info->color_type & PNG_COLOR_MASK_COLOR)
+ {
+ shift[channels++] = row_info->bit_depth - sig_bits->red;
+ shift[channels++] = row_info->bit_depth - sig_bits->green;
+ shift[channels++] = row_info->bit_depth - sig_bits->blue;
+ }
+
+ else
+ {
+ shift[channels++] = row_info->bit_depth - sig_bits->gray;
+ }
+
+ if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
+ {
+ shift[channels++] = row_info->bit_depth - sig_bits->alpha;
+ }
+
+ for (c = 0; c < channels; c++)
+ {
+ if (shift[c] <= 0)
+ shift[c] = 0;
+
+ else
+ value = 1;
+ }
+
+ if (!value)
+ return;
+
+ switch (row_info->bit_depth)
+ {
+ default:
+ break;
+
+ case 2:
+ {
+ png_bytep bp;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+
+ for (bp = row, i = 0; i < istop; i++)
+ {
+ *bp >>= 1;
+ *bp++ &= 0x55;
+ }
+ break;
+ }
+
+ case 4:
+ {
+ png_bytep bp = row;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+ png_byte mask = (png_byte)((((int)0xf0 >> shift[0]) & (int)0xf0) |
+ (png_byte)((int)0xf >> shift[0]));
+
+ for (i = 0; i < istop; i++)
+ {
+ *bp >>= shift[0];
+ *bp++ &= mask;
+ }
+ break;
+ }
+
+ case 8:
+ {
+ png_bytep bp = row;
+ png_uint_32 i;
+ png_uint_32 istop = row_width * channels;
+
+ for (i = 0; i < istop; i++)
+ {
+ *bp++ >>= shift[i%channels];
+ }
+ break;
+ }
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ case 16:
+ {
+ png_bytep bp = row;
+ png_uint_32 i;
+ png_uint_32 istop = channels * row_width;
+
+ for (i = 0; i < istop; i++)
+ {
+ value = (png_uint_16)((*bp << 8) + *(bp + 1));
+ value >>= shift[i%channels];
+ *bp++ = (png_byte)(value >> 8);
+ *bp++ = (png_byte)(value & 0xff);
+ }
+ break;
+ }
+#endif
+ }
+ }
+}
+#endif
+
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+/* Chop rows of bit depth 16 down to 8 */
+void /* PRIVATE */
+png_do_chop(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_chop");
+
+ if (row_info->bit_depth == 16)
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ png_uint_32 i;
+ png_uint_32 istop = row_info->width * row_info->channels;
+
+ for (i = 0; i<istop; i++, sp += 2, dp++)
+ {
+#ifdef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
+ /* This does a more accurate scaling of the 16-bit color
+ * value, rather than a simple low-byte truncation.
+ *
+ * What the ideal calculation should be:
+ * *dp = (((((png_uint_32)(*sp) << 8) |
+ * (png_uint_32)(*(sp + 1))) * 255 + 127)
+ * / (png_uint_32)65535L;
+ *
+ * GRR: no, I think this is what it really should be:
+ * *dp = (((((png_uint_32)(*sp) << 8) |
+ * (png_uint_32)(*(sp + 1))) + 128L)
+ * / (png_uint_32)257L;
+ *
+ * GRR: here's the exact calculation with shifts:
+ * temp = (((png_uint_32)(*sp) << 8) |
+ * (png_uint_32)(*(sp + 1))) + 128L;
+ * *dp = (temp - (temp >> 8)) >> 8;
+ *
+ * Approximate calculation with shift/add instead of multiply/divide:
+ * *dp = ((((png_uint_32)(*sp) << 8) |
+ * (png_uint_32)((int)(*(sp + 1)) - *sp)) + 128) >> 8;
+ *
+ * What we actually do to avoid extra shifting and conversion:
+ */
+
+ *dp = *sp + ((((int)(*(sp + 1)) - *sp) > 128) ? 1 : 0);
+#else
+ /* Simply discard the low order byte */
+ *dp = *sp;
+#endif
+ }
+ row_info->bit_depth = 8;
+ row_info->pixel_depth = (png_byte)(8 * row_info->channels);
+ row_info->rowbytes = row_info->width * row_info->channels;
+ }
+}
+#endif
+
+#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
+void /* PRIVATE */
+png_do_read_swap_alpha(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_read_swap_alpha");
+
+ {
+ png_uint_32 row_width = row_info->width;
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ {
+ /* This converts from RGBA to ARGB */
+ if (row_info->bit_depth == 8)
+ {
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_byte save;
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
+ {
+ save = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = save;
+ }
+ }
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ /* This converts from RRGGBBAA to AARRGGBB */
+ else
+ {
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_byte save[2];
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
+ {
+ save[0] = *(--sp);
+ save[1] = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = save[0];
+ *(--dp) = save[1];
+ }
+ }
+#endif
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ {
+ /* This converts from GA to AG */
+ if (row_info->bit_depth == 8)
+ {
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_byte save;
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
+ {
+ save = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = save;
+ }
+ }
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ /* This converts from GGAA to AAGG */
+ else
+ {
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_byte save[2];
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
+ {
+ save[0] = *(--sp);
+ save[1] = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = save[0];
+ *(--dp) = save[1];
+ }
+ }
+#endif
+ }
+ }
+}
+#endif
+
+#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
+void /* PRIVATE */
+png_do_read_invert_alpha(png_row_infop row_info, png_bytep row)
+{
+ png_uint_32 row_width;
+ png_debug(1, "in png_do_read_invert_alpha");
+
+ row_width = row_info->width;
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ /* This inverts the alpha channel in RGBA */
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = (png_byte)(255 - *(--sp));
+
+/* This does nothing:
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ We can replace it with:
+*/
+ sp-=3;
+ dp=sp;
+ }
+ }
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ /* This inverts the alpha channel in RRGGBBAA */
+ else
+ {
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = (png_byte)(255 - *(--sp));
+ *(--dp) = (png_byte)(255 - *(--sp));
+
+/* This does nothing:
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ We can replace it with:
+*/
+ sp-=6;
+ dp=sp;
+ }
+ }
+#endif
+ }
+ else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ /* This inverts the alpha channel in GA */
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = (png_byte)(255 - *(--sp));
+ *(--dp) = *(--sp);
+ }
+ }
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ else
+ {
+ /* This inverts the alpha channel in GGAA */
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_uint_32 i;
+
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = (png_byte)(255 - *(--sp));
+ *(--dp) = (png_byte)(255 - *(--sp));
+/*
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+*/
+ sp-=2;
+ dp=sp;
+ }
+ }
+#endif
+ }
+}
+#endif
+
+#ifdef PNG_READ_FILLER_SUPPORTED
+/* Add filler channel if we have RGB color */
+void /* PRIVATE */
+png_do_read_filler(png_row_infop row_info, png_bytep row,
+ png_uint_32 filler, png_uint_32 flags)
+{
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ png_byte hi_filler = (png_byte)((filler>>8) & 0xff);
+#endif
+ png_byte lo_filler = (png_byte)(filler & 0xff);
+
+ png_debug(1, "in png_do_read_filler");
+
+ if (
+ row_info->color_type == PNG_COLOR_TYPE_GRAY)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ if (flags & PNG_FLAG_FILLER_AFTER)
+ {
+ /* This changes the data from G to GX */
+ png_bytep sp = row + (png_size_t)row_width;
+ png_bytep dp = sp + (png_size_t)row_width;
+ for (i = 1; i < row_width; i++)
+ {
+ *(--dp) = lo_filler;
+ *(--dp) = *(--sp);
+ }
+ *(--dp) = lo_filler;
+ row_info->channels = 2;
+ row_info->pixel_depth = 16;
+ row_info->rowbytes = row_width * 2;
+ }
+
+ else
+ {
+ /* This changes the data from G to XG */
+ png_bytep sp = row + (png_size_t)row_width;
+ png_bytep dp = sp + (png_size_t)row_width;
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = *(--sp);
+ *(--dp) = lo_filler;
+ }
+ row_info->channels = 2;
+ row_info->pixel_depth = 16;
+ row_info->rowbytes = row_width * 2;
+ }
+ }
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ else if (row_info->bit_depth == 16)
+ {
+ if (flags & PNG_FLAG_FILLER_AFTER)
+ {
+ /* This changes the data from GG to GGXX */
+ png_bytep sp = row + (png_size_t)row_width * 2;
+ png_bytep dp = sp + (png_size_t)row_width * 2;
+ for (i = 1; i < row_width; i++)
+ {
+ *(--dp) = hi_filler;
+ *(--dp) = lo_filler;
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ }
+ *(--dp) = hi_filler;
+ *(--dp) = lo_filler;
+ row_info->channels = 2;
+ row_info->pixel_depth = 32;
+ row_info->rowbytes = row_width * 4;
+ }
+
+ else
+ {
+ /* This changes the data from GG to XXGG */
+ png_bytep sp = row + (png_size_t)row_width * 2;
+ png_bytep dp = sp + (png_size_t)row_width * 2;
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = hi_filler;
+ *(--dp) = lo_filler;
+ }
+ row_info->channels = 2;
+ row_info->pixel_depth = 32;
+ row_info->rowbytes = row_width * 4;
+ }
+ }
+#endif
+ } /* COLOR_TYPE == GRAY */
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ if (flags & PNG_FLAG_FILLER_AFTER)
+ {
+ /* This changes the data from RGB to RGBX */
+ png_bytep sp = row + (png_size_t)row_width * 3;
+ png_bytep dp = sp + (png_size_t)row_width;
+ for (i = 1; i < row_width; i++)
+ {
+ *(--dp) = lo_filler;
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ }
+ *(--dp) = lo_filler;
+ row_info->channels = 4;
+ row_info->pixel_depth = 32;
+ row_info->rowbytes = row_width * 4;
+ }
+
+ else
+ {
+ /* This changes the data from RGB to XRGB */
+ png_bytep sp = row + (png_size_t)row_width * 3;
+ png_bytep dp = sp + (png_size_t)row_width;
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = lo_filler;
+ }
+ row_info->channels = 4;
+ row_info->pixel_depth = 32;
+ row_info->rowbytes = row_width * 4;
+ }
+ }
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ else if (row_info->bit_depth == 16)
+ {
+ if (flags & PNG_FLAG_FILLER_AFTER)
+ {
+ /* This changes the data from RRGGBB to RRGGBBXX */
+ png_bytep sp = row + (png_size_t)row_width * 6;
+ png_bytep dp = sp + (png_size_t)row_width * 2;
+ for (i = 1; i < row_width; i++)
+ {
+ *(--dp) = hi_filler;
+ *(--dp) = lo_filler;
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ }
+ *(--dp) = hi_filler;
+ *(--dp) = lo_filler;
+ row_info->channels = 4;
+ row_info->pixel_depth = 64;
+ row_info->rowbytes = row_width * 8;
+ }
+
+ else
+ {
+ /* This changes the data from RRGGBB to XXRRGGBB */
+ png_bytep sp = row + (png_size_t)row_width * 6;
+ png_bytep dp = sp + (png_size_t)row_width * 2;
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = hi_filler;
+ *(--dp) = lo_filler;
+ }
+
+ row_info->channels = 4;
+ row_info->pixel_depth = 64;
+ row_info->rowbytes = row_width * 8;
+ }
+ }
+#endif
+ } /* COLOR_TYPE == RGB */
+}
+#endif
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+/* Expand grayscale files to RGB, with or without alpha */
+void /* PRIVATE */
+png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
+{
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ png_debug(1, "in png_do_gray_to_rgb");
+
+ if (row_info->bit_depth >= 8 &&
+ !(row_info->color_type & PNG_COLOR_MASK_COLOR))
+ {
+ if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ /* This changes G to RGB */
+ png_bytep sp = row + (png_size_t)row_width - 1;
+ png_bytep dp = sp + (png_size_t)row_width * 2;
+ for (i = 0; i < row_width; i++)
+ {
+ *(dp--) = *sp;
+ *(dp--) = *sp;
+ *(dp--) = *(sp--);
+ }
+ }
+
+ else
+ {
+ /* This changes GG to RRGGBB */
+ png_bytep sp = row + (png_size_t)row_width * 2 - 1;
+ png_bytep dp = sp + (png_size_t)row_width * 4;
+ for (i = 0; i < row_width; i++)
+ {
+ *(dp--) = *sp;
+ *(dp--) = *(sp - 1);
+ *(dp--) = *sp;
+ *(dp--) = *(sp - 1);
+ *(dp--) = *(sp--);
+ *(dp--) = *(sp--);
+ }
+ }
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ /* This changes GA to RGBA */
+ png_bytep sp = row + (png_size_t)row_width * 2 - 1;
+ png_bytep dp = sp + (png_size_t)row_width * 2;
+ for (i = 0; i < row_width; i++)
+ {
+ *(dp--) = *(sp--);
+ *(dp--) = *sp;
+ *(dp--) = *sp;
+ *(dp--) = *(sp--);
+ }
+ }
+
+ else
+ {
+ /* This changes GGAA to RRGGBBAA */
+ png_bytep sp = row + (png_size_t)row_width * 4 - 1;
+ png_bytep dp = sp + (png_size_t)row_width * 4;
+ for (i = 0; i < row_width; i++)
+ {
+ *(dp--) = *(sp--);
+ *(dp--) = *(sp--);
+ *(dp--) = *sp;
+ *(dp--) = *(sp - 1);
+ *(dp--) = *sp;
+ *(dp--) = *(sp - 1);
+ *(dp--) = *(sp--);
+ *(dp--) = *(sp--);
+ }
+ }
+ }
+ row_info->channels += (png_byte)2;
+ row_info->color_type |= PNG_COLOR_MASK_COLOR;
+ row_info->pixel_depth = (png_byte)(row_info->channels *
+ row_info->bit_depth);
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
+ }
+}
+#endif
+
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+/* Reduce RGB files to grayscale, with or without alpha
+ * using the equation given in Poynton's ColorFAQ at
+ * <http://www.inforamp.net/~poynton/> (THIS LINK IS DEAD June 2008)
+ * New link:
+ * <http://www.poynton.com/notes/colour_and_gamma/>
+ * Charles Poynton poynton at poynton.com
+ *
+ * Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
+ *
+ * We approximate this with
+ *
+ * Y = 0.21268 * R + 0.7151 * G + 0.07217 * B
+ *
+ * which can be expressed with integers as
+ *
+ * Y = (6969 * R + 23434 * G + 2365 * B)/32768
+ *
+ * The calculation is to be done in a linear colorspace.
+ *
+ * Other integer coefficents can be used via png_set_rgb_to_gray().
+ */
+int /* PRIVATE */
+png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
+
+{
+ png_uint_32 i;
+
+ png_uint_32 row_width = row_info->width;
+ int rgb_error = 0;
+
+ png_debug(1, "in png_do_rgb_to_gray");
+
+ if (!(row_info->color_type & PNG_COLOR_MASK_PALETTE) &&
+ (row_info->color_type & PNG_COLOR_MASK_COLOR))
+ {
+ png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
+ png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
+ png_uint_32 bc = png_ptr->rgb_to_gray_blue_coeff;
+
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ {
+ if (row_info->bit_depth == 8)
+ {
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL)
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+
+ for (i = 0; i < row_width; i++)
+ {
+ png_byte red = png_ptr->gamma_to_1[*(sp++)];
+ png_byte green = png_ptr->gamma_to_1[*(sp++)];
+ png_byte blue = png_ptr->gamma_to_1[*(sp++)];
+
+ if (red != green || red != blue)
+ {
+ rgb_error |= 1;
+ *(dp++) = png_ptr->gamma_from_1[
+ (rc*red + gc*green + bc*blue)>>15];
+ }
+
+ else
+ *(dp++) = *(sp - 1);
+ }
+ }
+ else
+#endif
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_byte red = *(sp++);
+ png_byte green = *(sp++);
+ png_byte blue = *(sp++);
+
+ if (red != green || red != blue)
+ {
+ rgb_error |= 1;
+ *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
+ }
+
+ else
+ *(dp++) = *(sp - 1);
+ }
+ }
+ }
+
+ else /* RGB bit_depth == 16 */
+ {
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ if (png_ptr->gamma_16_to_1 != NULL &&
+ png_ptr->gamma_16_from_1 != NULL)
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 red, green, blue, w;
+
+ red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+
+ if (red == green && red == blue)
+ w = red;
+
+ else
+ {
+ png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff)
+ >> png_ptr->gamma_shift][red>>8];
+ png_uint_16 green_1 =
+ png_ptr->gamma_16_to_1[(green&0xff) >>
+ png_ptr->gamma_shift][green>>8];
+ png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff)
+ >> png_ptr->gamma_shift][blue>>8];
+ png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1
+ + bc*blue_1)>>15);
+ w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
+ png_ptr->gamma_shift][gray16 >> 8];
+ rgb_error |= 1;
+ }
+
+ *(dp++) = (png_byte)((w>>8) & 0xff);
+ *(dp++) = (png_byte)(w & 0xff);
+ }
+ }
+ else
+#endif
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 red, green, blue, gray16;
+
+ red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+
+ if (red != green || red != blue)
+ rgb_error |= 1;
+
+ gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
+ *(dp++) = (png_byte)((gray16>>8) & 0xff);
+ *(dp++) = (png_byte)(gray16 & 0xff);
+ }
+ }
+ }
+ }
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
+ {
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL)
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_byte red = png_ptr->gamma_to_1[*(sp++)];
+ png_byte green = png_ptr->gamma_to_1[*(sp++)];
+ png_byte blue = png_ptr->gamma_to_1[*(sp++)];
+
+ if (red != green || red != blue)
+ rgb_error |= 1;
+
+ *(dp++) = png_ptr->gamma_from_1
+ [(rc*red + gc*green + bc*blue)>>15];
+
+ *(dp++) = *(sp++); /* alpha */
+ }
+ }
+ else
+#endif
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_byte red = *(sp++);
+ png_byte green = *(sp++);
+ png_byte blue = *(sp++);
+ if (red != green || red != blue)
+ rgb_error |= 1;
+
+ *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
+ *(dp++) = *(sp++); /* alpha */
+ }
+ }
+ }
+ else /* RGBA bit_depth == 16 */
+ {
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ if (png_ptr->gamma_16_to_1 != NULL &&
+ png_ptr->gamma_16_from_1 != NULL)
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 red, green, blue, w;
+
+ red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+
+ if (red == green && red == blue)
+ w = red;
+
+ else
+ {
+ png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >>
+ png_ptr->gamma_shift][red>>8];
+
+ png_uint_16 green_1 =
+ png_ptr->gamma_16_to_1[(green&0xff) >>
+ png_ptr->gamma_shift][green>>8];
+
+ png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >>
+ png_ptr->gamma_shift][blue>>8];
+
+ png_uint_16 gray16 = (png_uint_16)((rc * red_1
+ + gc * green_1 + bc * blue_1)>>15);
+
+ w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
+ png_ptr->gamma_shift][gray16 >> 8];
+
+ rgb_error |= 1;
+ }
+
+ *(dp++) = (png_byte)((w>>8) & 0xff);
+ *(dp++) = (png_byte)(w & 0xff);
+ *(dp++) = *(sp++); /* alpha */
+ *(dp++) = *(sp++);
+ }
+ }
+ else
+#endif
+ {
+ png_bytep sp = row;
+ png_bytep dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 red, green, blue, gray16;
+ red = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
+
+ if (red != green || red != blue)
+ rgb_error |= 1;
+
+ gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
+ *(dp++) = (png_byte)((gray16>>8) & 0xff);
+ *(dp++) = (png_byte)(gray16 & 0xff);
+ *(dp++) = *(sp++); /* alpha */
+ *(dp++) = *(sp++);
+ }
+ }
+ }
+ }
+ row_info->channels -= 2;
+ row_info->color_type = (png_byte)(row_info->color_type &
+ ~PNG_COLOR_MASK_COLOR);
+ row_info->pixel_depth = (png_byte)(row_info->channels *
+ row_info->bit_depth);
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
+ }
+ return rgb_error;
+}
+#endif
+
+/* Build a grayscale palette. Palette is assumed to be 1 << bit_depth
+ * large of png_color. This lets grayscale images be treated as
+ * paletted. Most useful for gamma correction and simplification
+ * of code.
+ */
+void PNGAPI
+png_build_grayscale_palette(int bit_depth, png_colorp palette)
+{
+ int num_palette;
+ int color_inc;
+ int i;
+ int v;
+
+ png_debug(1, "in png_do_build_grayscale_palette");
+
+ if (palette == NULL)
+ return;
+
+ switch (bit_depth)
+ {
+ case 1:
+ num_palette = 2;
+ color_inc = 0xff;
+ break;
+
+ case 2:
+ num_palette = 4;
+ color_inc = 0x55;
+ break;
+
+ case 4:
+ num_palette = 16;
+ color_inc = 0x11;
+ break;
+
+ case 8:
+ num_palette = 256;
+ color_inc = 1;
+ break;
+
+ default:
+ num_palette = 0;
+ color_inc = 0;
+ break;
+ }
+
+ for (i = 0, v = 0; i < num_palette; i++, v += color_inc)
+ {
+ palette[i].red = (png_byte)v;
+ palette[i].green = (png_byte)v;
+ palette[i].blue = (png_byte)v;
+ }
+}
+
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+/* Replace any alpha or transparency with the supplied background color.
+ * "background" is already in the screen gamma, while "background_1" is
+ * at a gamma of 1.0. Paletted files have already been taken care of.
+ */
+void /* PRIVATE */
+png_do_background(png_row_infop row_info, png_bytep row,
+ png_const_color_16p trans_color, png_const_color_16p background
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ , png_const_color_16p background_1, png_const_bytep gamma_table,
+ png_const_bytep gamma_from_1, png_const_bytep gamma_to_1,
+ png_const_uint_16pp gamma_16, png_const_uint_16pp gamma_16_from_1,
+ png_const_uint_16pp gamma_16_to_1, int gamma_shift
+#endif
+ )
+{
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+ int shift;
+
+ png_debug(1, "in png_do_background");
+
+ if (background != NULL &&
+ (!(row_info->color_type & PNG_COLOR_MASK_ALPHA) ||
+ (row_info->color_type != PNG_COLOR_TYPE_PALETTE && trans_color)))
+ {
+ switch (row_info->color_type)
+ {
+ case PNG_COLOR_TYPE_GRAY:
+ {
+ switch (row_info->bit_depth)
+ {
+ case 1:
+ {
+ sp = row;
+ shift = 7;
+ for (i = 0; i < row_width; i++)
+ {
+ if ((png_uint_16)((*sp >> shift) & 0x01)
+ == trans_color->gray)
+ {
+ *sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
+ *sp |= (png_byte)(background->gray << shift);
+ }
+
+ if (!shift)
+ {
+ shift = 7;
+ sp++;
+ }
+
+ else
+ shift--;
+ }
+ break;
+ }
+
+ case 2:
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_table != NULL)
+ {
+ sp = row;
+ shift = 6;
+ for (i = 0; i < row_width; i++)
+ {
+ if ((png_uint_16)((*sp >> shift) & 0x03)
+ == trans_color->gray)
+ {
+ *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
+ *sp |= (png_byte)(background->gray << shift);
+ }
+
+ else
+ {
+ png_byte p = (png_byte)((*sp >> shift) & 0x03);
+ png_byte g = (png_byte)((gamma_table [p | (p << 2) |
+ (p << 4) | (p << 6)] >> 6) & 0x03);
+ *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
+ *sp |= (png_byte)(g << shift);
+ }
+
+ if (!shift)
+ {
+ shift = 6;
+ sp++;
+ }
+
+ else
+ shift -= 2;
+ }
+ }
+
+ else
+#endif
+ {
+ sp = row;
+ shift = 6;
+ for (i = 0; i < row_width; i++)
+ {
+ if ((png_uint_16)((*sp >> shift) & 0x03)
+ == trans_color->gray)
+ {
+ *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
+ *sp |= (png_byte)(background->gray << shift);
+ }
+
+ if (!shift)
+ {
+ shift = 6;
+ sp++;
+ }
+
+ else
+ shift -= 2;
+ }
+ }
+ break;
+ }
+
+ case 4:
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_table != NULL)
+ {
+ sp = row;
+ shift = 4;
+ for (i = 0; i < row_width; i++)
+ {
+ if ((png_uint_16)((*sp >> shift) & 0x0f)
+ == trans_color->gray)
+ {
+ *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
+ *sp |= (png_byte)(background->gray << shift);
+ }
+
+ else
+ {
+ png_byte p = (png_byte)((*sp >> shift) & 0x0f);
+ png_byte g = (png_byte)((gamma_table[p |
+ (p << 4)] >> 4) & 0x0f);
+ *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
+ *sp |= (png_byte)(g << shift);
+ }
+
+ if (!shift)
+ {
+ shift = 4;
+ sp++;
+ }
+
+ else
+ shift -= 4;
+ }
+ }
+
+ else
+#endif
+ {
+ sp = row;
+ shift = 4;
+ for (i = 0; i < row_width; i++)
+ {
+ if ((png_uint_16)((*sp >> shift) & 0x0f)
+ == trans_color->gray)
+ {
+ *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
+ *sp |= (png_byte)(background->gray << shift);
+ }
+
+ if (!shift)
+ {
+ shift = 4;
+ sp++;
+ }
+
+ else
+ shift -= 4;
+ }
+ }
+ break;
+ }
+
+ case 8:
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_table != NULL)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++, sp++)
+ {
+ if (*sp == trans_color->gray)
+ *sp = (png_byte)background->gray;
+
+ else
+ *sp = gamma_table[*sp];
+ }
+ }
+ else
+#endif
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++, sp++)
+ {
+ if (*sp == trans_color->gray)
+ *sp = (png_byte)background->gray;
+ }
+ }
+ break;
+ }
+
+ case 16:
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_16 != NULL)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++, sp += 2)
+ {
+ png_uint_16 v;
+
+ v = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+
+ if (v == trans_color->gray)
+ {
+ /* Background is already in screen gamma */
+ *sp = (png_byte)((background->gray >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(background->gray & 0xff);
+ }
+
+ else
+ {
+ v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ }
+ }
+ }
+ else
+#endif
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++, sp += 2)
+ {
+ png_uint_16 v;
+
+ v = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+
+ if (v == trans_color->gray)
+ {
+ *sp = (png_byte)((background->gray >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(background->gray & 0xff);
+ }
+ }
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+ break;
+ }
+
+ case PNG_COLOR_TYPE_RGB:
+ {
+ if (row_info->bit_depth == 8)
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_table != NULL)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++, sp += 3)
+ {
+ if (*sp == trans_color->red &&
+ *(sp + 1) == trans_color->green &&
+ *(sp + 2) == trans_color->blue)
+ {
+ *sp = (png_byte)background->red;
+ *(sp + 1) = (png_byte)background->green;
+ *(sp + 2) = (png_byte)background->blue;
+ }
+
+ else
+ {
+ *sp = gamma_table[*sp];
+ *(sp + 1) = gamma_table[*(sp + 1)];
+ *(sp + 2) = gamma_table[*(sp + 2)];
+ }
+ }
+ }
+ else
+#endif
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++, sp += 3)
+ {
+ if (*sp == trans_color->red &&
+ *(sp + 1) == trans_color->green &&
+ *(sp + 2) == trans_color->blue)
+ {
+ *sp = (png_byte)background->red;
+ *(sp + 1) = (png_byte)background->green;
+ *(sp + 2) = (png_byte)background->blue;
+ }
+ }
+ }
+ }
+ else /* if (row_info->bit_depth == 16) */
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_16 != NULL)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++, sp += 6)
+ {
+ png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+
+ png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
+
+ png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8)
+ + *(sp + 5));
+
+ if (r == trans_color->red && g == trans_color->green &&
+ b == trans_color->blue)
+ {
+ /* Background is already in screen gamma */
+ *sp = (png_byte)((background->red >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(background->red & 0xff);
+ *(sp + 2) = (png_byte)((background->green >> 8) & 0xff);
+ *(sp + 3) = (png_byte)(background->green & 0xff);
+ *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff);
+ *(sp + 5) = (png_byte)(background->blue & 0xff);
+ }
+
+ else
+ {
+ png_uint_16 v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+
+ v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)];
+ *(sp + 2) = (png_byte)((v >> 8) & 0xff);
+ *(sp + 3) = (png_byte)(v & 0xff);
+
+ v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)];
+ *(sp + 4) = (png_byte)((v >> 8) & 0xff);
+ *(sp + 5) = (png_byte)(v & 0xff);
+ }
+ }
+ }
+
+ else
+#endif
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++, sp += 6)
+ {
+ png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+
+ png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
+
+ png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8)
+ + *(sp + 5));
+
+ if (r == trans_color->red && g == trans_color->green &&
+ b == trans_color->blue)
+ {
+ *sp = (png_byte)((background->red >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(background->red & 0xff);
+ *(sp + 2) = (png_byte)((background->green >> 8) & 0xff);
+ *(sp + 3) = (png_byte)(background->green & 0xff);
+ *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff);
+ *(sp + 5) = (png_byte)(background->blue & 0xff);
+ }
+ }
+ }
+ }
+ break;
+ }
+
+ case PNG_COLOR_TYPE_GRAY_ALPHA:
+ {
+ if (row_info->bit_depth == 8)
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_to_1 != NULL && gamma_from_1 != NULL &&
+ gamma_table != NULL)
+ {
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++, sp += 2, dp++)
+ {
+ png_uint_16 a = *(sp + 1);
+
+ if (a == 0xff)
+ *dp = gamma_table[*sp];
+
+ else if (a == 0)
+ {
+ /* Background is already in screen gamma */
+ *dp = (png_byte)background->gray;
+ }
+
+ else
+ {
+ png_byte v, w;
+
+ v = gamma_to_1[*sp];
+ png_composite(w, v, a, background_1->gray);
+ *dp = gamma_from_1[w];
+ }
+ }
+ }
+ else
+#endif
+ {
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++, sp += 2, dp++)
+ {
+ png_byte a = *(sp + 1);
+
+ if (a == 0xff)
+ *dp = *sp;
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ else if (a == 0)
+ *dp = (png_byte)background->gray;
+
+ else
+ png_composite(*dp, *sp, a, background_1->gray);
+
+#else
+ *dp = (png_byte)background->gray;
+#endif
+ }
+ }
+ }
+ else /* if (png_ptr->bit_depth == 16) */
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_16 != NULL && gamma_16_from_1 != NULL &&
+ gamma_16_to_1 != NULL)
+ {
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++, sp += 4, dp += 2)
+ {
+ png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
+
+ if (a == (png_uint_16)0xffff)
+ {
+ png_uint_16 v;
+
+ v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
+ *dp = (png_byte)((v >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(v & 0xff);
+ }
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ else if (a == 0)
+#else
+ else
+#endif
+ {
+ /* Background is already in screen gamma */
+ *dp = (png_byte)((background->gray >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(background->gray & 0xff);
+ }
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ else
+ {
+ png_uint_16 g, v, w;
+
+ g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
+ png_composite_16(v, g, a, background_1->gray);
+ w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8];
+ *dp = (png_byte)((w >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(w & 0xff);
+ }
+#endif
+ }
+ }
+ else
+#endif
+ {
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++, sp += 4, dp += 2)
+ {
+ png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
+
+ if (a == (png_uint_16)0xffff)
+ png_memcpy(dp, sp, 2);
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ else if (a == 0)
+#else
+ else
+#endif
+ {
+ *dp = (png_byte)((background->gray >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(background->gray & 0xff);
+ }
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ else
+ {
+ png_uint_16 g, v;
+
+ g = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+ png_composite_16(v, g, a, background_1->gray);
+ *dp = (png_byte)((v >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(v & 0xff);
+ }
+#endif
+ }
+ }
+ }
+ break;
+ }
+
+ case PNG_COLOR_TYPE_RGB_ALPHA:
+ {
+ if (row_info->bit_depth == 8)
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_to_1 != NULL && gamma_from_1 != NULL &&
+ gamma_table != NULL)
+ {
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++, sp += 4, dp += 3)
+ {
+ png_byte a = *(sp + 3);
+
+ if (a == 0xff)
+ {
+ *dp = gamma_table[*sp];
+ *(dp + 1) = gamma_table[*(sp + 1)];
+ *(dp + 2) = gamma_table[*(sp + 2)];
+ }
+
+ else if (a == 0)
+ {
+ /* Background is already in screen gamma */
+ *dp = (png_byte)background->red;
+ *(dp + 1) = (png_byte)background->green;
+ *(dp + 2) = (png_byte)background->blue;
+ }
+
+ else
+ {
+ png_byte v, w;
+
+ v = gamma_to_1[*sp];
+ png_composite(w, v, a, background_1->red);
+ *dp = gamma_from_1[w];
+
+ v = gamma_to_1[*(sp + 1)];
+ png_composite(w, v, a, background_1->green);
+ *(dp + 1) = gamma_from_1[w];
+
+ v = gamma_to_1[*(sp + 2)];
+ png_composite(w, v, a, background_1->blue);
+ *(dp + 2) = gamma_from_1[w];
+ }
+ }
+ }
+ else
+#endif
+ {
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++, sp += 4, dp += 3)
+ {
+ png_byte a = *(sp + 3);
+
+ if (a == 0xff)
+ {
+ *dp = *sp;
+ *(dp + 1) = *(sp + 1);
+ *(dp + 2) = *(sp + 2);
+ }
+
+ else if (a == 0)
+ {
+ *dp = (png_byte)background->red;
+ *(dp + 1) = (png_byte)background->green;
+ *(dp + 2) = (png_byte)background->blue;
+ }
+
+ else
+ {
+ png_composite(*dp, *sp, a, background->red);
+
+ png_composite(*(dp + 1), *(sp + 1), a,
+ background->green);
+
+ png_composite(*(dp + 2), *(sp + 2), a,
+ background->blue);
+ }
+ }
+ }
+ }
+ else /* if (row_info->bit_depth == 16) */
+ {
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ if (gamma_16 != NULL && gamma_16_from_1 != NULL &&
+ gamma_16_to_1 != NULL)
+ {
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++, sp += 8, dp += 6)
+ {
+ png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6))
+ << 8) + (png_uint_16)(*(sp + 7)));
+
+ if (a == (png_uint_16)0xffff)
+ {
+ png_uint_16 v;
+
+ v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
+ *dp = (png_byte)((v >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(v & 0xff);
+
+ v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)];
+ *(dp + 2) = (png_byte)((v >> 8) & 0xff);
+ *(dp + 3) = (png_byte)(v & 0xff);
+
+ v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)];
+ *(dp + 4) = (png_byte)((v >> 8) & 0xff);
+ *(dp + 5) = (png_byte)(v & 0xff);
+ }
+
+ else if (a == 0)
+ {
+ /* Background is already in screen gamma */
+ *dp = (png_byte)((background->red >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(background->red & 0xff);
+ *(dp + 2) = (png_byte)((background->green >> 8) & 0xff);
+ *(dp + 3) = (png_byte)(background->green & 0xff);
+ *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff);
+ *(dp + 5) = (png_byte)(background->blue & 0xff);
+ }
+
+ else
+ {
+ png_uint_16 v, w, x;
+
+ v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
+ png_composite_16(w, v, a, background_1->red);
+
+ x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
+ *dp = (png_byte)((x >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(x & 0xff);
+
+ v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)];
+ png_composite_16(w, v, a, background_1->green);
+
+ x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
+ *(dp + 2) = (png_byte)((x >> 8) & 0xff);
+ *(dp + 3) = (png_byte)(x & 0xff);
+
+ v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)];
+ png_composite_16(w, v, a, background_1->blue);
+
+ x = gamma_16_from_1[(w & 0xff) >> gamma_shift][w >> 8];
+ *(dp + 4) = (png_byte)((x >> 8) & 0xff);
+ *(dp + 5) = (png_byte)(x & 0xff);
+ }
+ }
+ }
+
+ else
+#endif
+ {
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++, sp += 8, dp += 6)
+ {
+ png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6))
+ << 8) + (png_uint_16)(*(sp + 7)));
+
+ if (a == (png_uint_16)0xffff)
+ {
+ png_memcpy(dp, sp, 6);
+ }
+
+ else if (a == 0)
+ {
+ *dp = (png_byte)((background->red >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(background->red & 0xff);
+ *(dp + 2) = (png_byte)((background->green >> 8) & 0xff);
+ *(dp + 3) = (png_byte)(background->green & 0xff);
+ *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff);
+ *(dp + 5) = (png_byte)(background->blue & 0xff);
+ }
+
+ else
+ {
+ png_uint_16 v;
+
+ png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+ png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
+ png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8)
+ + *(sp + 5));
+
+ png_composite_16(v, r, a, background->red);
+ *dp = (png_byte)((v >> 8) & 0xff);
+ *(dp + 1) = (png_byte)(v & 0xff);
+
+ png_composite_16(v, g, a, background->green);
+ *(dp + 2) = (png_byte)((v >> 8) & 0xff);
+ *(dp + 3) = (png_byte)(v & 0xff);
+
+ png_composite_16(v, b, a, background->blue);
+ *(dp + 4) = (png_byte)((v >> 8) & 0xff);
+ *(dp + 5) = (png_byte)(v & 0xff);
+ }
+ }
+ }
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
+ {
+ row_info->color_type = (png_byte)(row_info->color_type &
+ ~PNG_COLOR_MASK_ALPHA);
+ row_info->channels--;
+ row_info->pixel_depth = (png_byte)(row_info->channels *
+ row_info->bit_depth);
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
+ }
+ }
+}
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+/* Gamma correct the image, avoiding the alpha channel. Make sure
+ * you do this after you deal with the transparency issue on grayscale
+ * or RGB images. If your bit depth is 8, use gamma_table, if it
+ * is 16, use gamma_16_table and gamma_shift. Build these with
+ * build_gamma_table().
+ */
+void /* PRIVATE */
+png_do_gamma(png_row_infop row_info, png_bytep row,
+ png_const_bytep gamma_table, png_const_uint_16pp gamma_16_table,
+ int gamma_shift)
+{
+ png_bytep sp;
+ png_uint_32 i;
+ png_uint_32 row_width=row_info->width;
+
+ png_debug(1, "in png_do_gamma");
+
+ if (((row_info->bit_depth <= 8 && gamma_table != NULL) ||
+ (row_info->bit_depth == 16 && gamma_16_table != NULL)))
+ {
+ switch (row_info->color_type)
+ {
+ case PNG_COLOR_TYPE_RGB:
+ {
+ if (row_info->bit_depth == 8)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ *sp = gamma_table[*sp];
+ sp++;
+ *sp = gamma_table[*sp];
+ sp++;
+ *sp = gamma_table[*sp];
+ sp++;
+ }
+ }
+
+ else /* if (row_info->bit_depth == 16) */
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 v;
+
+ v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ sp += 2;
+
+ v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ sp += 2;
+
+ v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ sp += 2;
+ }
+ }
+ break;
+ }
+
+ case PNG_COLOR_TYPE_RGB_ALPHA:
+ {
+ if (row_info->bit_depth == 8)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ *sp = gamma_table[*sp];
+ sp++;
+
+ *sp = gamma_table[*sp];
+ sp++;
+
+ *sp = gamma_table[*sp];
+ sp++;
+
+ sp++;
+ }
+ }
+
+ else /* if (row_info->bit_depth == 16) */
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ sp += 2;
+
+ v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ sp += 2;
+
+ v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ sp += 4;
+ }
+ }
+ break;
+ }
+
+ case PNG_COLOR_TYPE_GRAY_ALPHA:
+ {
+ if (row_info->bit_depth == 8)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ *sp = gamma_table[*sp];
+ sp += 2;
+ }
+ }
+
+ else /* if (row_info->bit_depth == 16) */
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ sp += 4;
+ }
+ }
+ break;
+ }
+
+ case PNG_COLOR_TYPE_GRAY:
+ {
+ if (row_info->bit_depth == 2)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i += 4)
+ {
+ int a = *sp & 0xc0;
+ int b = *sp & 0x30;
+ int c = *sp & 0x0c;
+ int d = *sp & 0x03;
+
+ *sp = (png_byte)(
+ ((((int)gamma_table[a|(a>>2)|(a>>4)|(a>>6)]) ) & 0xc0)|
+ ((((int)gamma_table[(b<<2)|b|(b>>2)|(b>>4)])>>2) & 0x30)|
+ ((((int)gamma_table[(c<<4)|(c<<2)|c|(c>>2)])>>4) & 0x0c)|
+ ((((int)gamma_table[(d<<6)|(d<<4)|(d<<2)|d])>>6) ));
+ sp++;
+ }
+ }
+
+ if (row_info->bit_depth == 4)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i += 2)
+ {
+ int msb = *sp & 0xf0;
+ int lsb = *sp & 0x0f;
+
+ *sp = (png_byte)((((int)gamma_table[msb | (msb >> 4)]) & 0xf0)
+ | (((int)gamma_table[(lsb << 4) | lsb]) >> 4));
+ sp++;
+ }
+ }
+
+ else if (row_info->bit_depth == 8)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ *sp = gamma_table[*sp];
+ sp++;
+ }
+ }
+
+ else if (row_info->bit_depth == 16)
+ {
+ sp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
+ *sp = (png_byte)((v >> 8) & 0xff);
+ *(sp + 1) = (png_byte)(v & 0xff);
+ sp += 2;
+ }
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+ }
+}
+#endif
+
+#ifdef PNG_READ_EXPAND_SUPPORTED
+/* Expands a palette row to an RGB or RGBA row depending
+ * upon whether you supply trans and num_trans.
+ */
+void /* PRIVATE */
+png_do_expand_palette(png_row_infop row_info, png_bytep row,
+ png_const_colorp palette, png_const_bytep trans_alpha, int num_trans)
+{
+ int shift, value;
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width=row_info->width;
+
+ png_debug(1, "in png_do_expand_palette");
+
+ if (row_info->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (row_info->bit_depth < 8)
+ {
+ switch (row_info->bit_depth)
+ {
+ case 1:
+ {
+ sp = row + (png_size_t)((row_width - 1) >> 3);
+ dp = row + (png_size_t)row_width - 1;
+ shift = 7 - (int)((row_width + 7) & 0x07);
+ for (i = 0; i < row_width; i++)
+ {
+ if ((*sp >> shift) & 0x01)
+ *dp = 1;
+
+ else
+ *dp = 0;
+
+ if (shift == 7)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift++;
+
+ dp--;
+ }
+ break;
+ }
+
+ case 2:
+ {
+ sp = row + (png_size_t)((row_width - 1) >> 2);
+ dp = row + (png_size_t)row_width - 1;
+ shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
+ for (i = 0; i < row_width; i++)
+ {
+ value = (*sp >> shift) & 0x03;
+ *dp = (png_byte)value;
+ if (shift == 6)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift += 2;
+
+ dp--;
+ }
+ break;
+ }
+
+ case 4:
+ {
+ sp = row + (png_size_t)((row_width - 1) >> 1);
+ dp = row + (png_size_t)row_width - 1;
+ shift = (int)((row_width & 0x01) << 2);
+ for (i = 0; i < row_width; i++)
+ {
+ value = (*sp >> shift) & 0x0f;
+ *dp = (png_byte)value;
+ if (shift == 4)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift += 4;
+
+ dp--;
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+ row_info->bit_depth = 8;
+ row_info->pixel_depth = 8;
+ row_info->rowbytes = row_width;
+ }
+
+ if (row_info->bit_depth == 8)
+ {
+ {
+ if (trans_alpha != NULL)
+ {
+ sp = row + (png_size_t)row_width - 1;
+ dp = row + (png_size_t)(row_width << 2) - 1;
+
+ for (i = 0; i < row_width; i++)
+ {
+ if ((int)(*sp) >= num_trans)
+ *dp-- = 0xff;
+
+ else
+ *dp-- = trans_alpha[*sp];
+
+ *dp-- = palette[*sp].blue;
+ *dp-- = palette[*sp].green;
+ *dp-- = palette[*sp].red;
+ sp--;
+ }
+ row_info->bit_depth = 8;
+ row_info->pixel_depth = 32;
+ row_info->rowbytes = row_width * 4;
+ row_info->color_type = 6;
+ row_info->channels = 4;
+ }
+
+ else
+ {
+ sp = row + (png_size_t)row_width - 1;
+ dp = row + (png_size_t)(row_width * 3) - 1;
+
+ for (i = 0; i < row_width; i++)
+ {
+ *dp-- = palette[*sp].blue;
+ *dp-- = palette[*sp].green;
+ *dp-- = palette[*sp].red;
+ sp--;
+ }
+
+ row_info->bit_depth = 8;
+ row_info->pixel_depth = 24;
+ row_info->rowbytes = row_width * 3;
+ row_info->color_type = 2;
+ row_info->channels = 3;
+ }
+ }
+ }
+ }
+}
+
+/* If the bit depth < 8, it is expanded to 8. Also, if the already
+ * expanded transparency value is supplied, an alpha channel is built.
+ */
+void /* PRIVATE */
+png_do_expand(png_row_infop row_info, png_bytep row,
+ png_const_color_16p trans_value)
+{
+ int shift, value;
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width=row_info->width;
+
+ png_debug(1, "in png_do_expand");
+
+ {
+ if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
+ {
+ png_uint_16 gray = (png_uint_16)(trans_value ? trans_value->gray : 0);
+
+ if (row_info->bit_depth < 8)
+ {
+ switch (row_info->bit_depth)
+ {
+ case 1:
+ {
+ gray = (png_uint_16)((gray & 0x01) * 0xff);
+ sp = row + (png_size_t)((row_width - 1) >> 3);
+ dp = row + (png_size_t)row_width - 1;
+ shift = 7 - (int)((row_width + 7) & 0x07);
+ for (i = 0; i < row_width; i++)
+ {
+ if ((*sp >> shift) & 0x01)
+ *dp = 0xff;
+
+ else
+ *dp = 0;
+
+ if (shift == 7)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift++;
+
+ dp--;
+ }
+ break;
+ }
+
+ case 2:
+ {
+ gray = (png_uint_16)((gray & 0x03) * 0x55);
+ sp = row + (png_size_t)((row_width - 1) >> 2);
+ dp = row + (png_size_t)row_width - 1;
+ shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
+ for (i = 0; i < row_width; i++)
+ {
+ value = (*sp >> shift) & 0x03;
+ *dp = (png_byte)(value | (value << 2) | (value << 4) |
+ (value << 6));
+ if (shift == 6)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift += 2;
+
+ dp--;
+ }
+ break;
+ }
+
+ case 4:
+ {
+ gray = (png_uint_16)((gray & 0x0f) * 0x11);
+ sp = row + (png_size_t)((row_width - 1) >> 1);
+ dp = row + (png_size_t)row_width - 1;
+ shift = (int)((1 - ((row_width + 1) & 0x01)) << 2);
+ for (i = 0; i < row_width; i++)
+ {
+ value = (*sp >> shift) & 0x0f;
+ *dp = (png_byte)(value | (value << 4));
+ if (shift == 4)
+ {
+ shift = 0;
+ sp--;
+ }
+
+ else
+ shift = 4;
+
+ dp--;
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ row_info->bit_depth = 8;
+ row_info->pixel_depth = 8;
+ row_info->rowbytes = row_width;
+ }
+
+ if (trans_value != NULL)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ gray = gray & 0xff;
+ sp = row + (png_size_t)row_width - 1;
+ dp = row + (png_size_t)(row_width << 1) - 1;
+
+ for (i = 0; i < row_width; i++)
+ {
+ if (*sp == gray)
+ *dp-- = 0;
+
+ else
+ *dp-- = 0xff;
+
+ *dp-- = *sp--;
+ }
+ }
+
+ else if (row_info->bit_depth == 16)
+ {
+ png_byte gray_high = (png_byte)((gray >> 8) & 0xff);
+ png_byte gray_low = (png_byte)(gray & 0xff);
+ sp = row + row_info->rowbytes - 1;
+ dp = row + (row_info->rowbytes << 1) - 1;
+ for (i = 0; i < row_width; i++)
+ {
+ if (*(sp - 1) == gray_high && *(sp) == gray_low)
+ {
+ *dp-- = 0;
+ *dp-- = 0;
+ }
+
+ else
+ {
+ *dp-- = 0xff;
+ *dp-- = 0xff;
+ }
+
+ *dp-- = *sp--;
+ *dp-- = *sp--;
+ }
+ }
+
+ row_info->color_type = PNG_COLOR_TYPE_GRAY_ALPHA;
+ row_info->channels = 2;
+ row_info->pixel_depth = (png_byte)(row_info->bit_depth << 1);
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
+ row_width);
+ }
+ }
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB && trans_value)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ png_byte red = (png_byte)(trans_value->red & 0xff);
+ png_byte green = (png_byte)(trans_value->green & 0xff);
+ png_byte blue = (png_byte)(trans_value->blue & 0xff);
+ sp = row + (png_size_t)row_info->rowbytes - 1;
+ dp = row + (png_size_t)(row_width << 2) - 1;
+ for (i = 0; i < row_width; i++)
+ {
+ if (*(sp - 2) == red && *(sp - 1) == green && *(sp) == blue)
+ *dp-- = 0;
+
+ else
+ *dp-- = 0xff;
+
+ *dp-- = *sp--;
+ *dp-- = *sp--;
+ *dp-- = *sp--;
+ }
+ }
+ else if (row_info->bit_depth == 16)
+ {
+ png_byte red_high = (png_byte)((trans_value->red >> 8) & 0xff);
+ png_byte green_high = (png_byte)((trans_value->green >> 8) & 0xff);
+ png_byte blue_high = (png_byte)((trans_value->blue >> 8) & 0xff);
+ png_byte red_low = (png_byte)(trans_value->red & 0xff);
+ png_byte green_low = (png_byte)(trans_value->green & 0xff);
+ png_byte blue_low = (png_byte)(trans_value->blue & 0xff);
+ sp = row + row_info->rowbytes - 1;
+ dp = row + (png_size_t)(row_width << 3) - 1;
+ for (i = 0; i < row_width; i++)
+ {
+ if (*(sp - 5) == red_high &&
+ *(sp - 4) == red_low &&
+ *(sp - 3) == green_high &&
+ *(sp - 2) == green_low &&
+ *(sp - 1) == blue_high &&
+ *(sp ) == blue_low)
+ {
+ *dp-- = 0;
+ *dp-- = 0;
+ }
+
+ else
+ {
+ *dp-- = 0xff;
+ *dp-- = 0xff;
+ }
+
+ *dp-- = *sp--;
+ *dp-- = *sp--;
+ *dp-- = *sp--;
+ *dp-- = *sp--;
+ *dp-- = *sp--;
+ *dp-- = *sp--;
+ }
+ }
+ row_info->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+ row_info->channels = 4;
+ row_info->pixel_depth = (png_byte)(row_info->bit_depth << 2);
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
+ }
+ }
+}
+#endif
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+/* If the bit depth is 8 and the colour type is not a palette type expand the
+ * whole row to 16 bits. Has no effect otherwise.
+ */
+void /* PRIVATE */
+png_do_expand_16(png_row_infop row_info, png_bytep row)
+{
+ if (row_info->bit_depth == 8 &&
+ row_info->color_type != PNG_COLOR_TYPE_PALETTE)
+ {
+ /* The row have a sequence of bytes containing [0..255] and we need
+ * to turn it into another row containing [0..65535], to do this we
+ * calculate:
+ *
+ * (input / 255) * 65535
+ *
+ * Which happens to be exactly input * 257 and this can be achieved
+ * simply by byte replication in place (copying backwards).
+ */
+ png_byte *sp = row + row_info->rowbytes; /* source, last byte + 1 */
+ png_byte *dp = sp + row_info->rowbytes; /* destination, end + 1 */
+ while (dp > sp)
+ dp[-2] = dp[-1] = *--sp, dp -= 2;
+
+ row_info->rowbytes *= 2;
+ row_info->bit_depth = 16;
+ row_info->pixel_depth = (png_byte)(row_info->channels * 16);
+ }
+}
+#endif
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+void /* PRIVATE */
+png_do_quantize(png_row_infop row_info, png_bytep row,
+ png_const_bytep palette_lookup, png_const_bytep quantize_lookup)
+{
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width=row_info->width;
+
+ png_debug(1, "in png_do_quantize");
+
+ if (row_info->bit_depth == 8)
+ {
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB && palette_lookup)
+ {
+ int r, g, b, p;
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ r = *sp++;
+ g = *sp++;
+ b = *sp++;
+
+ /* This looks real messy, but the compiler will reduce
+ * it down to a reasonable formula. For example, with
+ * 5 bits per color, we get:
+ * p = (((r >> 3) & 0x1f) << 10) |
+ * (((g >> 3) & 0x1f) << 5) |
+ * ((b >> 3) & 0x1f);
+ */
+ p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) &
+ ((1 << PNG_QUANTIZE_RED_BITS) - 1)) <<
+ (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) |
+ (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) &
+ ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) <<
+ (PNG_QUANTIZE_BLUE_BITS)) |
+ ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) &
+ ((1 << PNG_QUANTIZE_BLUE_BITS) - 1));
+
+ *dp++ = palette_lookup[p];
+ }
+
+ row_info->color_type = PNG_COLOR_TYPE_PALETTE;
+ row_info->channels = 1;
+ row_info->pixel_depth = row_info->bit_depth;
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
+ palette_lookup != NULL)
+ {
+ int r, g, b, p;
+ sp = row;
+ dp = row;
+ for (i = 0; i < row_width; i++)
+ {
+ r = *sp++;
+ g = *sp++;
+ b = *sp++;
+ sp++;
+
+ p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) &
+ ((1 << PNG_QUANTIZE_RED_BITS) - 1)) <<
+ (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) |
+ (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) &
+ ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) <<
+ (PNG_QUANTIZE_BLUE_BITS)) |
+ ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) &
+ ((1 << PNG_QUANTIZE_BLUE_BITS) - 1));
+
+ *dp++ = palette_lookup[p];
+ }
+
+ row_info->color_type = PNG_COLOR_TYPE_PALETTE;
+ row_info->channels = 1;
+ row_info->pixel_depth = row_info->bit_depth;
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_PALETTE &&
+ quantize_lookup)
+ {
+ sp = row;
+
+ for (i = 0; i < row_width; i++, sp++)
+ {
+ *sp = quantize_lookup[*sp];
+ }
+ }
+ }
+}
+#endif /* PNG_READ_QUANTIZE_SUPPORTED */
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+/* Undoes intrapixel differencing */
+void /* PRIVATE */
+png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_read_intrapixel");
+
+ if (
+ (row_info->color_type & PNG_COLOR_MASK_COLOR))
+ {
+ int bytes_per_pixel;
+ png_uint_32 row_width = row_info->width;
+
+ if (row_info->bit_depth == 8)
+ {
+ png_bytep rp;
+ png_uint_32 i;
+
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ bytes_per_pixel = 3;
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ bytes_per_pixel = 4;
+
+ else
+ return;
+
+ for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
+ {
+ *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff);
+ *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff);
+ }
+ }
+ else if (row_info->bit_depth == 16)
+ {
+ png_bytep rp;
+ png_uint_32 i;
+
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ bytes_per_pixel = 6;
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ bytes_per_pixel = 8;
+
+ else
+ return;
+
+ for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
+ {
+ png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1);
+ png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3);
+ png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
+ png_uint_32 red = (png_uint_32)((s0 + s1 + 65536L) & 0xffffL);
+ png_uint_32 blue = (png_uint_32)((s2 + s1 + 65536L) & 0xffffL);
+ *(rp ) = (png_byte)((red >> 8) & 0xff);
+ *(rp + 1) = (png_byte)(red & 0xff);
+ *(rp + 4) = (png_byte)((blue >> 8) & 0xff);
+ *(rp + 5) = (png_byte)(blue & 0xff);
+ }
+ }
+ }
+}
+#endif /* PNG_MNG_FEATURES_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED */
--- /dev/null
+
+/* pngrutil.c - utilities to read a PNG file
+ *
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * This file contains routines that are only called from within
+ * libpng itself during the course of reading an image.
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_READ_SUPPORTED
+
+#define png_strtod(p,a,b) strtod(a,b)
+
+png_uint_32 PNGAPI
+png_get_uint_31(png_structp png_ptr, png_const_bytep buf)
+{
+ png_uint_32 uval = png_get_uint_32(buf);
+
+ if (uval > PNG_UINT_31_MAX)
+ png_error(png_ptr, "PNG unsigned integer out of range");
+
+ return (uval);
+}
+
+#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_READ_cHRM_SUPPORTED)
+/* The following is a variation on the above for use with the fixed
+ * point values used for gAMA and cHRM. Instead of png_error it
+ * issues a warning and returns (-1) - an invalid value because both
+ * gAMA and cHRM use *unsigned* integers for fixed point values.
+ */
+#define PNG_FIXED_ERROR (-1)
+
+static png_fixed_point /* PRIVATE */
+png_get_fixed_point(png_structp png_ptr, png_const_bytep buf)
+{
+ png_uint_32 uval = png_get_uint_32(buf);
+
+ if (uval <= PNG_UINT_31_MAX)
+ return (png_fixed_point)uval; /* known to be in range */
+
+ /* The caller can turn off the warning by passing NULL. */
+ if (png_ptr != NULL)
+ png_warning(png_ptr, "PNG fixed point integer out of range");
+
+ return PNG_FIXED_ERROR;
+}
+#endif
+
+#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
+/* NOTE: the read macros will obscure these definitions, so that if
+ * PNG_USE_READ_MACROS is set the library will not use them internally,
+ * but the APIs will still be available externally.
+ *
+ * The parentheses around "PNGAPI function_name" in the following three
+ * functions are necessary because they allow the macros to co-exist with
+ * these (unused but exported) functions.
+ */
+
+/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
+png_uint_32 (PNGAPI
+png_get_uint_32)(png_const_bytep buf)
+{
+ png_uint_32 uval =
+ ((png_uint_32)(*(buf )) << 24) +
+ ((png_uint_32)(*(buf + 1)) << 16) +
+ ((png_uint_32)(*(buf + 2)) << 8) +
+ ((png_uint_32)(*(buf + 3)) ) ;
+
+ return uval;
+}
+
+/* Grab a signed 32-bit integer from a buffer in big-endian format. The
+ * data is stored in the PNG file in two's complement format and there
+ * is no guarantee that a 'png_int_32' is exactly 32 bits, therefore
+ * the following code does a two's complement to native conversion.
+ */
+png_int_32 (PNGAPI
+png_get_int_32)(png_const_bytep buf)
+{
+ png_uint_32 uval = png_get_uint_32(buf);
+ if ((uval & 0x80000000L) == 0) /* non-negative */
+ return uval;
+
+ uval = (uval ^ 0xffffffffL) + 1; /* 2's complement: -x = ~x+1 */
+ return -(png_int_32)uval;
+}
+
+/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */
+png_uint_16 (PNGAPI
+png_get_uint_16)(png_const_bytep buf)
+{
+ /* ANSI-C requires an int value to accomodate at least 16 bits so this
+ * works and allows the compiler not to worry about possible narrowing
+ * on 32 bit systems. (Pre-ANSI systems did not make integers smaller
+ * than 16 bits either.)
+ */
+ unsigned int val =
+ ((unsigned int)(*buf) << 8) +
+ ((unsigned int)(*(buf + 1)));
+
+ return (png_uint_16)val;
+}
+
+#endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */
+
+/* Read and check the PNG file signature */
+void /* PRIVATE */
+png_read_sig(png_structp png_ptr, png_infop info_ptr)
+{
+ png_size_t num_checked, num_to_check;
+
+ /* Exit if the user application does not expect a signature. */
+ if (png_ptr->sig_bytes >= 8)
+ return;
+
+ num_checked = png_ptr->sig_bytes;
+ num_to_check = 8 - num_checked;
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE;
+#endif
+
+ /* The signature must be serialized in a single I/O call. */
+ png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check);
+ png_ptr->sig_bytes = 8;
+
+ if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
+ {
+ if (num_checked < 4 &&
+ png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
+ png_error(png_ptr, "Not a PNG file");
+ else
+ png_error(png_ptr, "PNG file corrupted by ASCII conversion");
+ }
+ if (num_checked < 3)
+ png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
+}
+
+/* Read the chunk header (length + type name).
+ * Put the type name into png_ptr->chunk_name, and return the length.
+ */
+png_uint_32 /* PRIVATE */
+png_read_chunk_header(png_structp png_ptr)
+{
+ png_byte buf[8];
+ png_uint_32 length;
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_HDR;
+#endif
+
+ /* Read the length and the chunk name.
+ * This must be performed in a single I/O call.
+ */
+ png_read_data(png_ptr, buf, 8);
+ length = png_get_uint_31(png_ptr, buf);
+
+ /* Put the chunk name into png_ptr->chunk_name. */
+ png_memcpy(png_ptr->chunk_name, buf + 4, 4);
+
+ png_debug2(0, "Reading %s chunk, length = %u",
+ png_ptr->chunk_name, length);
+
+ /* Reset the crc and run it over the chunk name. */
+ png_reset_crc(png_ptr);
+ png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
+
+ /* Check to see if chunk name is valid. */
+ png_check_chunk_name(png_ptr, png_ptr->chunk_name);
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_DATA;
+#endif
+
+ return length;
+}
+
+/* Read data, and (optionally) run it through the CRC. */
+void /* PRIVATE */
+png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_read_data(png_ptr, buf, length);
+ png_calculate_crc(png_ptr, buf, length);
+}
+
+/* Optionally skip data and then check the CRC. Depending on whether we
+ * are reading a ancillary or critical chunk, and how the program has set
+ * things up, we may calculate the CRC on the data and print a message.
+ * Returns '1' if there was a CRC error, '0' otherwise.
+ */
+int /* PRIVATE */
+png_crc_finish(png_structp png_ptr, png_uint_32 skip)
+{
+ png_size_t i;
+ png_size_t istop = png_ptr->zbuf_size;
+
+ for (i = (png_size_t)skip; i > istop; i -= istop)
+ {
+ png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
+ }
+
+ if (i)
+ {
+ png_crc_read(png_ptr, png_ptr->zbuf, i);
+ }
+
+ if (png_crc_error(png_ptr))
+ {
+ if (((png_ptr->chunk_name[0] & 0x20) && /* Ancillary */
+ !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) ||
+ (!(png_ptr->chunk_name[0] & 0x20) && /* Critical */
+ (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)))
+ {
+ png_chunk_warning(png_ptr, "CRC error");
+ }
+
+ else
+ {
+ png_chunk_benign_error(png_ptr, "CRC error");
+ return (0);
+ }
+
+ return (1);
+ }
+
+ return (0);
+}
+
+/* Compare the CRC stored in the PNG file with that calculated by libpng from
+ * the data it has read thus far.
+ */
+int /* PRIVATE */
+png_crc_error(png_structp png_ptr)
+{
+ png_byte crc_bytes[4];
+ png_uint_32 crc;
+ int need_crc = 1;
+
+ if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
+ {
+ if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
+ (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
+ need_crc = 0;
+ }
+
+ else /* critical */
+ {
+ if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
+ need_crc = 0;
+ }
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_CRC;
+#endif
+
+ /* The chunk CRC must be serialized in a single I/O call. */
+ png_read_data(png_ptr, crc_bytes, 4);
+
+ if (need_crc)
+ {
+ crc = png_get_uint_32(crc_bytes);
+ return ((int)(crc != png_ptr->crc));
+ }
+
+ else
+ return (0);
+}
+
+#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \
+ defined(PNG_READ_iCCP_SUPPORTED)
+static png_size_t
+png_inflate(png_structp png_ptr, png_bytep data, png_size_t size,
+ png_bytep output, png_size_t output_size)
+{
+ png_size_t count = 0;
+
+ /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't
+ * even necessarily handle 65536 bytes) because the type uInt is "16 bits or
+ * more". Consequently it is necessary to chunk the input to zlib. This
+ * code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the maximum value
+ * that can be stored in a uInt.) It is possible to set ZLIB_IO_MAX to a
+ * lower value in pngpriv.h and this may sometimes have a performance
+ * advantage, because it forces access of the input data to be separated from
+ * at least some of the use by some period of time.
+ */
+ png_ptr->zstream.next_in = data;
+ /* avail_in is set below from 'size' */
+ png_ptr->zstream.avail_in = 0;
+
+ while (1)
+ {
+ int ret, avail;
+
+ /* The setting of 'avail_in' used to be outside the loop, by setting it
+ * inside it is possible to chunk the input to zlib and simply rely on
+ * zlib to advance the 'next_in' pointer. This allows arbitrary amounts o
+ * data to be passed through zlib at the unavoidable cost of requiring a
+ * window save (memcpy of up to 32768 output bytes) every ZLIB_IO_MAX
+ * input bytes.
+ */
+ if (png_ptr->zstream.avail_in == 0 && size > 0)
+ {
+ if (size <= ZLIB_IO_MAX)
+ {
+ /* The value is less than ZLIB_IO_MAX so the cast is safe: */
+ png_ptr->zstream.avail_in = (uInt)size;
+ size = 0;
+ }
+
+ else
+ {
+ png_ptr->zstream.avail_in = ZLIB_IO_MAX;
+ size -= ZLIB_IO_MAX;
+ }
+ }
+
+ /* Reset the output buffer each time round - we empty it
+ * after every inflate call.
+ */
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = png_ptr->zbuf_size;
+
+ ret = inflate(&png_ptr->zstream, Z_NO_FLUSH);
+ avail = png_ptr->zbuf_size - png_ptr->zstream.avail_out;
+
+ /* First copy/count any new output - but only if we didn't
+ * get an error code.
+ */
+ if ((ret == Z_OK || ret == Z_STREAM_END) && avail > 0)
+ {
+ png_size_t space = avail; /* > 0, see above */
+
+ if (output != 0 && output_size > count)
+ {
+ png_size_t copy = output_size - count;
+
+ if (space < copy)
+ copy = space;
+
+ png_memcpy(output + count, png_ptr->zbuf, copy);
+ }
+ count += space;
+ }
+
+ if (ret == Z_OK)
+ continue;
+
+ /* Termination conditions - always reset the zstream, it
+ * must be left in inflateInit state.
+ */
+ png_ptr->zstream.avail_in = 0;
+ inflateReset(&png_ptr->zstream);
+
+ if (ret == Z_STREAM_END)
+ return count; /* NOTE: may be zero. */
+
+ /* Now handle the error codes - the API always returns 0
+ * and the error message is dumped into the uncompressed
+ * buffer if available.
+ */
+ {
+ PNG_CONST char *msg;
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ char umsg[52];
+#endif
+ if (png_ptr->zstream.msg != 0)
+ msg = png_ptr->zstream.msg;
+
+ else
+ {
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ switch (ret)
+ {
+ case Z_BUF_ERROR:
+ msg = "Buffer error in compressed datastream in %s chunk";
+ break;
+
+ case Z_DATA_ERROR:
+ msg = "Data error in compressed datastream in %s chunk";
+ break;
+
+ default:
+ msg = "Incomplete compressed datastream in %s chunk";
+ break;
+ }
+
+ png_snprintf(umsg, sizeof umsg, msg, png_ptr->chunk_name);
+ msg = umsg;
+#else
+ msg = "Damaged compressed datastream in chunk other than IDAT";
+#endif
+ }
+
+ png_warning(png_ptr, msg);
+ }
+
+ /* 0 means an error - notice that this code simply ignores
+ * zero length compressed chunks as a result.
+ */
+ return 0;
+ }
+}
+
+/*
+ * Decompress trailing data in a chunk. The assumption is that chunkdata
+ * points at an allocated area holding the contents of a chunk with a
+ * trailing compressed part. What we get back is an allocated area
+ * holding the original prefix part and an uncompressed version of the
+ * trailing part (the malloc area passed in is freed).
+ */
+void /* PRIVATE */
+png_decompress_chunk(png_structp png_ptr, int comp_type,
+ png_size_t chunklength,
+ png_size_t prefix_size, png_size_t *newlength)
+{
+ /* The caller should guarantee this */
+ if (prefix_size > chunklength)
+ {
+ /* The recovery is to delete the chunk. */
+ png_warning(png_ptr, "invalid chunklength");
+ prefix_size = 0; /* To delete everything */
+ }
+
+ else if (comp_type == PNG_COMPRESSION_TYPE_BASE)
+ {
+ png_size_t expanded_size = png_inflate(png_ptr,
+ (png_bytep)(png_ptr->chunkdata + prefix_size),
+ chunklength - prefix_size,
+ 0, /*output*/
+ 0); /*output size*/
+
+ /* Now check the limits on this chunk - if the limit fails the
+ * compressed data will be removed, the prefix will remain.
+ */
+#ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
+ if (png_ptr->user_chunk_malloc_max &&
+ (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1))
+#else
+# ifdef PNG_USER_CHUNK_MALLOC_MAX
+ if ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
+ prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1)
+# endif
+#endif
+ png_warning(png_ptr, "Exceeded size limit while expanding chunk");
+
+ /* If the size is zero either there was an error and a message
+ * has already been output (warning) or the size really is zero
+ * and we have nothing to do - the code will exit through the
+ * error case below.
+ */
+#if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \
+ defined(PNG_USER_CHUNK_MALLOC_MAX)
+ else if (expanded_size > 0)
+#else
+ if (expanded_size > 0)
+#endif
+ {
+ /* Success (maybe) - really uncompress the chunk. */
+ png_size_t new_size = 0;
+ png_charp text = png_malloc_warn(png_ptr,
+ prefix_size + expanded_size + 1);
+
+ if (text != NULL)
+ {
+ png_memcpy(text, png_ptr->chunkdata, prefix_size);
+ new_size = png_inflate(png_ptr,
+ (png_bytep)(png_ptr->chunkdata + prefix_size),
+ chunklength - prefix_size,
+ (png_bytep)(text + prefix_size), expanded_size);
+ text[prefix_size + expanded_size] = 0; /* just in case */
+
+ if (new_size == expanded_size)
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = text;
+ *newlength = prefix_size + expanded_size;
+ return; /* The success return! */
+ }
+
+ png_warning(png_ptr, "png_inflate logic error");
+ png_free(png_ptr, text);
+ }
+
+ else
+ png_warning(png_ptr, "Not enough memory to decompress chunk");
+ }
+ }
+
+ else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */
+ {
+#ifdef PNG_STDIO_SUPPORTED
+ char umsg[50];
+
+ png_snprintf(umsg, sizeof umsg,
+ "Unknown zTXt compression type %d", comp_type);
+ png_warning(png_ptr, umsg);
+#else
+ png_warning(png_ptr, "Unknown zTXt compression type");
+#endif
+
+ /* The recovery is to simply drop the data. */
+ }
+
+ /* Generic error return - leave the prefix, delete the compressed
+ * data, reallocate the chunkdata to remove the potentially large
+ * amount of compressed data.
+ */
+ {
+ png_charp text = png_malloc_warn(png_ptr, prefix_size + 1);
+
+ if (text != NULL)
+ {
+ if (prefix_size > 0)
+ png_memcpy(text, png_ptr->chunkdata, prefix_size);
+
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = text;
+
+ /* This is an extra zero in the 'uncompressed' part. */
+ *(png_ptr->chunkdata + prefix_size) = 0x00;
+ }
+ /* Ignore a malloc error here - it is safe. */
+ }
+
+ *newlength = prefix_size;
+}
+#endif
+
+/* Read and check the IDHR chunk */
+void /* PRIVATE */
+png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_byte buf[13];
+ png_uint_32 width, height;
+ int bit_depth, color_type, compression_type, filter_type;
+ int interlace_type;
+
+ png_debug(1, "in png_handle_IHDR");
+
+ if (png_ptr->mode & PNG_HAVE_IHDR)
+ png_error(png_ptr, "Out of place IHDR");
+
+ /* Check the length */
+ if (length != 13)
+ png_error(png_ptr, "Invalid IHDR chunk");
+
+ png_ptr->mode |= PNG_HAVE_IHDR;
+
+ png_crc_read(png_ptr, buf, 13);
+ png_crc_finish(png_ptr, 0);
+
+ width = png_get_uint_31(png_ptr, buf);
+ height = png_get_uint_31(png_ptr, buf + 4);
+ bit_depth = buf[8];
+ color_type = buf[9];
+ compression_type = buf[10];
+ filter_type = buf[11];
+ interlace_type = buf[12];
+
+ /* Set internal variables */
+ png_ptr->width = width;
+ png_ptr->height = height;
+ png_ptr->bit_depth = (png_byte)bit_depth;
+ png_ptr->interlaced = (png_byte)interlace_type;
+ png_ptr->color_type = (png_byte)color_type;
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ png_ptr->filter_type = (png_byte)filter_type;
+#endif
+ png_ptr->compression_type = (png_byte)compression_type;
+
+ /* Find number of channels */
+ switch (png_ptr->color_type)
+ {
+ default: /* invalid, png_set_IHDR calls png_error */
+ case PNG_COLOR_TYPE_GRAY:
+ case PNG_COLOR_TYPE_PALETTE:
+ png_ptr->channels = 1;
+ break;
+
+ case PNG_COLOR_TYPE_RGB:
+ png_ptr->channels = 3;
+ break;
+
+ case PNG_COLOR_TYPE_GRAY_ALPHA:
+ png_ptr->channels = 2;
+ break;
+
+ case PNG_COLOR_TYPE_RGB_ALPHA:
+ png_ptr->channels = 4;
+ break;
+ }
+
+ /* Set up other useful info */
+ png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth *
+ png_ptr->channels);
+ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width);
+ png_debug1(3, "bit_depth = %d", png_ptr->bit_depth);
+ png_debug1(3, "channels = %d", png_ptr->channels);
+ png_debug1(3, "rowbytes = %lu", (unsigned long)png_ptr->rowbytes);
+ png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth,
+ color_type, interlace_type, compression_type, filter_type);
+}
+
+/* Read and check the palette */
+void /* PRIVATE */
+png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_color palette[PNG_MAX_PALETTE_LENGTH];
+ int num, i;
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
+ png_colorp pal_ptr;
+#endif
+
+ png_debug(1, "in png_handle_PLTE");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before PLTE");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid PLTE after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (png_ptr->mode & PNG_HAVE_PLTE)
+ png_error(png_ptr, "Duplicate PLTE chunk");
+
+ png_ptr->mode |= PNG_HAVE_PLTE;
+
+ if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
+ {
+ png_warning(png_ptr,
+ "Ignoring PLTE chunk in grayscale PNG");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+#ifndef PNG_READ_OPT_PLTE_SUPPORTED
+ if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+#endif
+
+ if (length > 3*PNG_MAX_PALETTE_LENGTH || length % 3)
+ {
+ if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
+ {
+ png_warning(png_ptr, "Invalid palette chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else
+ {
+ png_error(png_ptr, "Invalid palette chunk");
+ }
+ }
+
+ num = (int)length / 3;
+
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
+ for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++)
+ {
+ png_byte buf[3];
+
+ png_crc_read(png_ptr, buf, 3);
+ pal_ptr->red = buf[0];
+ pal_ptr->green = buf[1];
+ pal_ptr->blue = buf[2];
+ }
+#else
+ for (i = 0; i < num; i++)
+ {
+ png_byte buf[3];
+
+ png_crc_read(png_ptr, buf, 3);
+ /* Don't depend upon png_color being any order */
+ palette[i].red = buf[0];
+ palette[i].green = buf[1];
+ palette[i].blue = buf[2];
+ }
+#endif
+
+ /* If we actually need the PLTE chunk (ie for a paletted image), we do
+ * whatever the normal CRC configuration tells us. However, if we
+ * have an RGB image, the PLTE can be considered ancillary, so
+ * we will act as though it is.
+ */
+#ifndef PNG_READ_OPT_PLTE_SUPPORTED
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+#endif
+ {
+ png_crc_finish(png_ptr, 0);
+ }
+
+#ifndef PNG_READ_OPT_PLTE_SUPPORTED
+ else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */
+ {
+ /* If we don't want to use the data from an ancillary chunk,
+ * we have two options: an error abort, or a warning and we
+ * ignore the data in this chunk (which should be OK, since
+ * it's considered ancillary for a RGB or RGBA image).
+ */
+ if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE))
+ {
+ if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)
+ {
+ png_chunk_benign_error(png_ptr, "CRC error");
+ }
+
+ else
+ {
+ png_chunk_warning(png_ptr, "CRC error");
+ return;
+ }
+ }
+
+ /* Otherwise, we (optionally) emit a warning and use the chunk. */
+ else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN))
+ {
+ png_chunk_warning(png_ptr, "CRC error");
+ }
+ }
+#endif
+
+ png_set_PLTE(png_ptr, info_ptr, palette, num);
+
+#ifdef PNG_READ_tRNS_SUPPORTED
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
+ {
+ if (png_ptr->num_trans > (png_uint_16)num)
+ {
+ png_warning(png_ptr, "Truncating incorrect tRNS chunk length");
+ png_ptr->num_trans = (png_uint_16)num;
+ }
+
+ if (info_ptr->num_trans > (png_uint_16)num)
+ {
+ png_warning(png_ptr, "Truncating incorrect info tRNS chunk length");
+ info_ptr->num_trans = (png_uint_16)num;
+ }
+ }
+ }
+#endif
+
+}
+
+void /* PRIVATE */
+png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_debug(1, "in png_handle_IEND");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT))
+ {
+ png_error(png_ptr, "No image in file");
+ }
+
+ png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND);
+
+ if (length != 0)
+ {
+ png_warning(png_ptr, "Incorrect IEND chunk length");
+ }
+
+ png_crc_finish(png_ptr, length);
+
+ PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */
+}
+
+#ifdef PNG_READ_gAMA_SUPPORTED
+void /* PRIVATE */
+png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_fixed_point igamma;
+ png_byte buf[4];
+
+ png_debug(1, "in png_handle_gAMA");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before gAMA");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid gAMA after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (png_ptr->mode & PNG_HAVE_PLTE)
+ /* Should be an error, but we can cope with it */
+ png_warning(png_ptr, "Out of place gAMA chunk");
+
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
+#ifdef PNG_READ_sRGB_SUPPORTED
+ && !(info_ptr->valid & PNG_INFO_sRGB)
+#endif
+ )
+ {
+ png_warning(png_ptr, "Duplicate gAMA chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (length != 4)
+ {
+ png_warning(png_ptr, "Incorrect gAMA chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, 4);
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ igamma = png_get_fixed_point(NULL, buf);
+
+ /* Check for zero gamma or an error. */
+ if (igamma <= 0)
+ {
+ png_warning(png_ptr,
+ "Ignoring gAMA chunk with out of range gamma");
+
+ return;
+ }
+
+# ifdef PNG_READ_sRGB_SUPPORTED
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB))
+ {
+ if (PNG_OUT_OF_RANGE(igamma, 45500L, 500))
+ {
+ png_warning(png_ptr,
+ "Ignoring incorrect gAMA value when sRGB is also present");
+
+# ifdef PNG_CONSOLE_IO_SUPPORTED
+ fprintf(stderr, "gamma = (%d/100000)", (int)igamma);
+# endif
+ return;
+ }
+ }
+# endif /* PNG_READ_sRGB_SUPPORTED */
+
+# ifdef PNG_READ_GAMMA_SUPPORTED
+ /* Gamma correction on read is supported. */
+ png_ptr->gamma = igamma;
+# endif
+ /* And set the 'info' structure members. */
+ png_set_gAMA_fixed(png_ptr, info_ptr, igamma);
+}
+#endif
+
+#ifdef PNG_READ_sBIT_SUPPORTED
+void /* PRIVATE */
+png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_size_t truelen;
+ png_byte buf[4];
+
+ png_debug(1, "in png_handle_sBIT");
+
+ buf[0] = buf[1] = buf[2] = buf[3] = 0;
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before sBIT");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid sBIT after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (png_ptr->mode & PNG_HAVE_PLTE)
+ {
+ /* Should be an error, but we can cope with it */
+ png_warning(png_ptr, "Out of place sBIT chunk");
+ }
+
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT))
+ {
+ png_warning(png_ptr, "Duplicate sBIT chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ truelen = 3;
+
+ else
+ truelen = (png_size_t)png_ptr->channels;
+
+ if (length != truelen || length > 4)
+ {
+ png_warning(png_ptr, "Incorrect sBIT chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, truelen);
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
+ {
+ png_ptr->sig_bit.red = buf[0];
+ png_ptr->sig_bit.green = buf[1];
+ png_ptr->sig_bit.blue = buf[2];
+ png_ptr->sig_bit.alpha = buf[3];
+ }
+
+ else
+ {
+ png_ptr->sig_bit.gray = buf[0];
+ png_ptr->sig_bit.red = buf[0];
+ png_ptr->sig_bit.green = buf[0];
+ png_ptr->sig_bit.blue = buf[0];
+ png_ptr->sig_bit.alpha = buf[1];
+ }
+
+ png_set_sBIT(png_ptr, info_ptr, &(png_ptr->sig_bit));
+}
+#endif
+
+#ifdef PNG_READ_cHRM_SUPPORTED
+void /* PRIVATE */
+png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_byte buf[32];
+ png_fixed_point x_white, y_white, x_red, y_red, x_green, y_green, x_blue,
+ y_blue;
+
+ png_debug(1, "in png_handle_cHRM");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before cHRM");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid cHRM after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (png_ptr->mode & PNG_HAVE_PLTE)
+ /* Should be an error, but we can cope with it */
+ png_warning(png_ptr, "Missing PLTE before cHRM");
+
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)
+# ifdef PNG_READ_sRGB_SUPPORTED
+ && !(info_ptr->valid & PNG_INFO_sRGB)
+# endif
+ )
+ {
+ png_warning(png_ptr, "Duplicate cHRM chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (length != 32)
+ {
+ png_warning(png_ptr, "Incorrect cHRM chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, 32);
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ x_white = png_get_fixed_point(NULL, buf);
+ y_white = png_get_fixed_point(NULL, buf + 4);
+ x_red = png_get_fixed_point(NULL, buf + 8);
+ y_red = png_get_fixed_point(NULL, buf + 12);
+ x_green = png_get_fixed_point(NULL, buf + 16);
+ y_green = png_get_fixed_point(NULL, buf + 20);
+ x_blue = png_get_fixed_point(NULL, buf + 24);
+ y_blue = png_get_fixed_point(NULL, buf + 28);
+
+ if (x_white == PNG_FIXED_ERROR ||
+ y_white == PNG_FIXED_ERROR ||
+ x_red == PNG_FIXED_ERROR ||
+ y_red == PNG_FIXED_ERROR ||
+ x_green == PNG_FIXED_ERROR ||
+ y_green == PNG_FIXED_ERROR ||
+ x_blue == PNG_FIXED_ERROR ||
+ y_blue == PNG_FIXED_ERROR)
+ {
+ png_warning(png_ptr, "Ignoring cHRM chunk with negative chromaticities");
+ return;
+ }
+
+#ifdef PNG_READ_sRGB_SUPPORTED
+ if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB))
+ {
+ if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) ||
+ PNG_OUT_OF_RANGE(y_white, 32900, 1000) ||
+ PNG_OUT_OF_RANGE(x_red, 64000L, 1000) ||
+ PNG_OUT_OF_RANGE(y_red, 33000, 1000) ||
+ PNG_OUT_OF_RANGE(x_green, 30000, 1000) ||
+ PNG_OUT_OF_RANGE(y_green, 60000L, 1000) ||
+ PNG_OUT_OF_RANGE(x_blue, 15000, 1000) ||
+ PNG_OUT_OF_RANGE(y_blue, 6000, 1000))
+ {
+ png_warning(png_ptr,
+ "Ignoring incorrect cHRM value when sRGB is also present");
+
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ fprintf(stderr, "wx=%d, wy=%d, rx=%d, ry=%d\n",
+ x_white, y_white, x_red, y_red);
+
+ fprintf(stderr, "gx=%d, gy=%d, bx=%d, by=%d\n",
+ x_green, y_green, x_blue, y_blue);
+#endif /* PNG_CONSOLE_IO_SUPPORTED */
+ }
+ return;
+ }
+#endif /* PNG_READ_sRGB_SUPPORTED */
+
+ png_set_cHRM_fixed(png_ptr, info_ptr, x_white, y_white, x_red, y_red,
+ x_green, y_green, x_blue, y_blue);
+}
+#endif
+
+#ifdef PNG_READ_sRGB_SUPPORTED
+void /* PRIVATE */
+png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ int intent;
+ png_byte buf[1];
+
+ png_debug(1, "in png_handle_sRGB");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before sRGB");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid sRGB after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (png_ptr->mode & PNG_HAVE_PLTE)
+ /* Should be an error, but we can cope with it */
+ png_warning(png_ptr, "Out of place sRGB chunk");
+
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB))
+ {
+ png_warning(png_ptr, "Duplicate sRGB chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (length != 1)
+ {
+ png_warning(png_ptr, "Incorrect sRGB chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, 1);
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ intent = buf[0];
+
+ /* Check for bad intent */
+ if (intent >= PNG_sRGB_INTENT_LAST)
+ {
+ png_warning(png_ptr, "Unknown sRGB intent");
+ return;
+ }
+
+#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA))
+ {
+ if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500L, 500))
+ {
+ png_warning(png_ptr,
+ "Ignoring incorrect gAMA value when sRGB is also present");
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ fprintf(stderr, "incorrect gamma=(%d/100000)\n", info_ptr->gamma);
+#endif
+ }
+ }
+#endif /* PNG_READ_gAMA_SUPPORTED */
+
+#ifdef PNG_READ_cHRM_SUPPORTED
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
+ if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->x_red, 64000L, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_green, 60000L, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000))
+ {
+ png_warning(png_ptr,
+ "Ignoring incorrect cHRM value when sRGB is also present");
+ }
+#endif /* PNG_READ_cHRM_SUPPORTED */
+
+ png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent);
+}
+#endif /* PNG_READ_sRGB_SUPPORTED */
+
+#ifdef PNG_READ_iCCP_SUPPORTED
+void /* PRIVATE */
+png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+/* Note: this does not properly handle chunks that are > 64K under DOS */
+{
+ png_byte compression_type;
+ png_bytep pC;
+ png_charp profile;
+ png_uint_32 skip = 0;
+ png_uint_32 profile_size;
+ png_alloc_size_t profile_length;
+ png_size_t slength, prefix_length, data_length;
+
+ png_debug(1, "in png_handle_iCCP");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before iCCP");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid iCCP after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (png_ptr->mode & PNG_HAVE_PLTE)
+ /* Should be an error, but we can cope with it */
+ png_warning(png_ptr, "Out of place iCCP chunk");
+
+ if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP))
+ {
+ png_warning(png_ptr, "Duplicate iCCP chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "iCCP chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+
+ if (png_crc_finish(png_ptr, skip))
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ png_ptr->chunkdata[slength] = 0x00;
+
+ for (profile = png_ptr->chunkdata; *profile; profile++)
+ /* Empty loop to find end of name */ ;
+
+ ++profile;
+
+ /* There should be at least one zero (the compression type byte)
+ * following the separator, and we should be on it
+ */
+ if (profile >= png_ptr->chunkdata + slength - 1)
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_warning(png_ptr, "Malformed iCCP chunk");
+ return;
+ }
+
+ /* Compression_type should always be zero */
+ compression_type = *profile++;
+
+ if (compression_type)
+ {
+ png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk");
+ compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8
+ wrote nonzero) */
+ }
+
+ prefix_length = profile - png_ptr->chunkdata;
+ png_decompress_chunk(png_ptr, compression_type,
+ slength, prefix_length, &data_length);
+
+ profile_length = data_length - prefix_length;
+
+ if (prefix_length > data_length || profile_length < 4)
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_warning(png_ptr, "Profile size field missing from iCCP chunk");
+ return;
+ }
+
+ /* Check the profile_size recorded in the first 32 bits of the ICC profile */
+ pC = (png_bytep)(png_ptr->chunkdata + prefix_length);
+ profile_size = ((*(pC )) << 24) |
+ ((*(pC + 1)) << 16) |
+ ((*(pC + 2)) << 8) |
+ ((*(pC + 3)) );
+
+ /* NOTE: the following guarantees that 'profile_length' fits into 32 bits,
+ * because profile_size is a 32 bit value.
+ */
+ if (profile_size < profile_length)
+ profile_length = profile_size;
+
+ /* And the following guarantees that profile_size == profile_length. */
+ if (profile_size > profile_length)
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+#ifdef PNG_STDIO_SUPPORTED
+ {
+ char umsg[80];
+
+ png_snprintf2(umsg, 80,
+ "Ignoring iCCP chunk with declared size = %u "
+ "and actual length = %u",
+ (unsigned int) profile_size,
+ (unsigned int) profile_length);
+ png_warning(png_ptr, umsg);
+ }
+#else
+ png_warning(png_ptr,
+ "Ignoring iCCP chunk with uncompressed size mismatch");
+#endif
+ return;
+ }
+
+ png_set_iCCP(png_ptr, info_ptr, png_ptr->chunkdata,
+ compression_type, (png_bytep)png_ptr->chunkdata + prefix_length,
+ profile_size);
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+}
+#endif /* PNG_READ_iCCP_SUPPORTED */
+
+#ifdef PNG_READ_sPLT_SUPPORTED
+void /* PRIVATE */
+png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+/* Note: this does not properly handle chunks that are > 64K under DOS */
+{
+ png_bytep entry_start;
+ png_sPLT_t new_palette;
+ png_sPLT_entryp pp;
+ png_uint_32 data_length;
+ int entry_size, i;
+ png_uint_32 skip = 0;
+ png_size_t slength;
+ png_uint_32 dl;
+ png_size_t max_dl;
+
+ png_debug(1, "in png_handle_sPLT");
+
+#ifdef PNG_USER_LIMITS_SUPPORTED
+
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for sPLT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before sPLT");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid sPLT after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "sPLT chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
+
+ /* WARNING: this may break if size_t is less than 32 bits; it is assumed
+ * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a
+ * potential breakage point if the types in pngconf.h aren't exactly right.
+ */
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+
+ if (png_crc_finish(png_ptr, skip))
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ png_ptr->chunkdata[slength] = 0x00;
+
+ for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start;
+ entry_start++)
+ /* Empty loop to find end of name */ ;
+
+ ++entry_start;
+
+ /* A sample depth should follow the separator, and we should be on it */
+ if (entry_start > (png_bytep)png_ptr->chunkdata + slength - 2)
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_warning(png_ptr, "malformed sPLT chunk");
+ return;
+ }
+
+ new_palette.depth = *entry_start++;
+ entry_size = (new_palette.depth == 8 ? 6 : 10);
+ /* This must fit in a png_uint_32 because it is derived from the original
+ * chunk data length (and use 'length', not 'slength' here for clarity -
+ * they are guaranteed to be the same, see the tests above.)
+ */
+ data_length = length - (png_uint_32)(entry_start -
+ (png_bytep)png_ptr->chunkdata);
+
+ /* Integrity-check the data length */
+ if (data_length % entry_size)
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_warning(png_ptr, "sPLT chunk has bad length");
+ return;
+ }
+
+ dl = (png_int_32)(data_length / entry_size);
+ max_dl = PNG_SIZE_MAX / png_sizeof(png_sPLT_entry);
+
+ if (dl > max_dl)
+ {
+ png_warning(png_ptr, "sPLT chunk too long");
+ return;
+ }
+
+ new_palette.nentries = (png_int_32)(data_length / entry_size);
+
+ new_palette.entries = (png_sPLT_entryp)png_malloc_warn(
+ png_ptr, new_palette.nentries * png_sizeof(png_sPLT_entry));
+
+ if (new_palette.entries == NULL)
+ {
+ png_warning(png_ptr, "sPLT chunk requires too much memory");
+ return;
+ }
+
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
+ for (i = 0; i < new_palette.nentries; i++)
+ {
+ pp = new_palette.entries + i;
+
+ if (new_palette.depth == 8)
+ {
+ pp->red = *entry_start++;
+ pp->green = *entry_start++;
+ pp->blue = *entry_start++;
+ pp->alpha = *entry_start++;
+ }
+
+ else
+ {
+ pp->red = png_get_uint_16(entry_start); entry_start += 2;
+ pp->green = png_get_uint_16(entry_start); entry_start += 2;
+ pp->blue = png_get_uint_16(entry_start); entry_start += 2;
+ pp->alpha = png_get_uint_16(entry_start); entry_start += 2;
+ }
+
+ pp->frequency = png_get_uint_16(entry_start); entry_start += 2;
+ }
+#else
+ pp = new_palette.entries;
+
+ for (i = 0; i < new_palette.nentries; i++)
+ {
+
+ if (new_palette.depth == 8)
+ {
+ pp[i].red = *entry_start++;
+ pp[i].green = *entry_start++;
+ pp[i].blue = *entry_start++;
+ pp[i].alpha = *entry_start++;
+ }
+
+ else
+ {
+ pp[i].red = png_get_uint_16(entry_start); entry_start += 2;
+ pp[i].green = png_get_uint_16(entry_start); entry_start += 2;
+ pp[i].blue = png_get_uint_16(entry_start); entry_start += 2;
+ pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2;
+ }
+
+ pp[i].frequency = png_get_uint_16(entry_start); entry_start += 2;
+ }
+#endif
+
+ /* Discard all chunk data except the name and stash that */
+ new_palette.name = png_ptr->chunkdata;
+
+ png_set_sPLT(png_ptr, info_ptr, &new_palette, 1);
+
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_free(png_ptr, new_palette.entries);
+}
+#endif /* PNG_READ_sPLT_SUPPORTED */
+
+#ifdef PNG_READ_tRNS_SUPPORTED
+void /* PRIVATE */
+png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_byte readbuf[PNG_MAX_PALETTE_LENGTH];
+
+ png_debug(1, "in png_handle_tRNS");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before tRNS");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid tRNS after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
+ {
+ png_warning(png_ptr, "Duplicate tRNS chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
+ {
+ png_byte buf[2];
+
+ if (length != 2)
+ {
+ png_warning(png_ptr, "Incorrect tRNS chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, 2);
+ png_ptr->num_trans = 1;
+ png_ptr->trans_color.gray = png_get_uint_16(buf);
+ }
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
+ {
+ png_byte buf[6];
+
+ if (length != 6)
+ {
+ png_warning(png_ptr, "Incorrect tRNS chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, (png_size_t)length);
+ png_ptr->num_trans = 1;
+ png_ptr->trans_color.red = png_get_uint_16(buf);
+ png_ptr->trans_color.green = png_get_uint_16(buf + 2);
+ png_ptr->trans_color.blue = png_get_uint_16(buf + 4);
+ }
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (!(png_ptr->mode & PNG_HAVE_PLTE))
+ {
+ /* Should be an error, but we can cope with it. */
+ png_warning(png_ptr, "Missing PLTE before tRNS");
+ }
+
+ if (length > (png_uint_32)png_ptr->num_palette ||
+ length > PNG_MAX_PALETTE_LENGTH)
+ {
+ png_warning(png_ptr, "Incorrect tRNS chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (length == 0)
+ {
+ png_warning(png_ptr, "Zero length tRNS chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, readbuf, (png_size_t)length);
+ png_ptr->num_trans = (png_uint_16)length;
+ }
+
+ else
+ {
+ png_warning(png_ptr, "tRNS chunk not allowed with alpha channel");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (png_crc_finish(png_ptr, 0))
+ {
+ png_ptr->num_trans = 0;
+ return;
+ }
+
+ png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans,
+ &(png_ptr->trans_color));
+}
+#endif
+
+#ifdef PNG_READ_bKGD_SUPPORTED
+void /* PRIVATE */
+png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_size_t truelen;
+ png_byte buf[6];
+
+ png_debug(1, "in png_handle_bKGD");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before bKGD");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid bKGD after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
+ !(png_ptr->mode & PNG_HAVE_PLTE))
+ {
+ png_warning(png_ptr, "Missing PLTE before bKGD");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD))
+ {
+ png_warning(png_ptr, "Duplicate bKGD chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ truelen = 1;
+
+ else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
+ truelen = 6;
+
+ else
+ truelen = 2;
+
+ if (length != truelen)
+ {
+ png_warning(png_ptr, "Incorrect bKGD chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, truelen);
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ /* We convert the index value into RGB components so that we can allow
+ * arbitrary RGB values for background when we have transparency, and
+ * so it is easy to determine the RGB values of the background color
+ * from the info_ptr struct.
+ */
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ png_ptr->background.index = buf[0];
+
+ if (info_ptr && info_ptr->num_palette)
+ {
+ if (buf[0] >= info_ptr->num_palette)
+ {
+ png_warning(png_ptr, "Incorrect bKGD chunk index value");
+ return;
+ }
+
+ png_ptr->background.red =
+ (png_uint_16)png_ptr->palette[buf[0]].red;
+
+ png_ptr->background.green =
+ (png_uint_16)png_ptr->palette[buf[0]].green;
+
+ png_ptr->background.blue =
+ (png_uint_16)png_ptr->palette[buf[0]].blue;
+ }
+ }
+
+ else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */
+ {
+ png_ptr->background.red =
+ png_ptr->background.green =
+ png_ptr->background.blue =
+ png_ptr->background.gray = png_get_uint_16(buf);
+ }
+
+ else
+ {
+ png_ptr->background.red = png_get_uint_16(buf);
+ png_ptr->background.green = png_get_uint_16(buf + 2);
+ png_ptr->background.blue = png_get_uint_16(buf + 4);
+ }
+
+ png_set_bKGD(png_ptr, info_ptr, &(png_ptr->background));
+}
+#endif
+
+#ifdef PNG_READ_hIST_SUPPORTED
+void /* PRIVATE */
+png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ unsigned int num, i;
+ png_uint_16 readbuf[PNG_MAX_PALETTE_LENGTH];
+
+ png_debug(1, "in png_handle_hIST");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before hIST");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid hIST after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (!(png_ptr->mode & PNG_HAVE_PLTE))
+ {
+ png_warning(png_ptr, "Missing PLTE before hIST");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST))
+ {
+ png_warning(png_ptr, "Duplicate hIST chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ num = length / 2 ;
+
+ if (num != (unsigned int)png_ptr->num_palette || num >
+ (unsigned int)PNG_MAX_PALETTE_LENGTH)
+ {
+ png_warning(png_ptr, "Incorrect hIST chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ for (i = 0; i < num; i++)
+ {
+ png_byte buf[2];
+
+ png_crc_read(png_ptr, buf, 2);
+ readbuf[i] = png_get_uint_16(buf);
+ }
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ png_set_hIST(png_ptr, info_ptr, readbuf);
+}
+#endif
+
+#ifdef PNG_READ_pHYs_SUPPORTED
+void /* PRIVATE */
+png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_byte buf[9];
+ png_uint_32 res_x, res_y;
+ int unit_type;
+
+ png_debug(1, "in png_handle_pHYs");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before pHYs");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid pHYs after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ {
+ png_warning(png_ptr, "Duplicate pHYs chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (length != 9)
+ {
+ png_warning(png_ptr, "Incorrect pHYs chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, 9);
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ res_x = png_get_uint_32(buf);
+ res_y = png_get_uint_32(buf + 4);
+ unit_type = buf[8];
+ png_set_pHYs(png_ptr, info_ptr, res_x, res_y, unit_type);
+}
+#endif
+
+#ifdef PNG_READ_oFFs_SUPPORTED
+void /* PRIVATE */
+png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_byte buf[9];
+ png_int_32 offset_x, offset_y;
+ int unit_type;
+
+ png_debug(1, "in png_handle_oFFs");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before oFFs");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid oFFs after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
+ {
+ png_warning(png_ptr, "Duplicate oFFs chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (length != 9)
+ {
+ png_warning(png_ptr, "Incorrect oFFs chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, 9);
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ offset_x = png_get_int_32(buf);
+ offset_y = png_get_int_32(buf + 4);
+ unit_type = buf[8];
+ png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type);
+}
+#endif
+
+#ifdef PNG_READ_pCAL_SUPPORTED
+/* Read the pCAL chunk (described in the PNG Extensions document) */
+void /* PRIVATE */
+png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_int_32 X0, X1;
+ png_byte type, nparams;
+ png_charp buf, units, endptr;
+ png_charpp params;
+ png_size_t slength;
+ int i;
+
+ png_debug(1, "in png_handle_pCAL");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before pCAL");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid pCAL after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL))
+ {
+ png_warning(png_ptr, "Duplicate pCAL chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_debug1(2, "Allocating and reading pCAL chunk data (%u bytes)",
+ length + 1);
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
+ if (png_ptr->chunkdata == NULL)
+ {
+ png_warning(png_ptr, "No memory for pCAL purpose");
+ return;
+ }
+
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+
+ if (png_crc_finish(png_ptr, 0))
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
+
+ png_debug(3, "Finding end of pCAL purpose string");
+ for (buf = png_ptr->chunkdata; *buf; buf++)
+ /* Empty loop */ ;
+
+ endptr = png_ptr->chunkdata + slength;
+
+ /* We need to have at least 12 bytes after the purpose string
+ * in order to get the parameter information.
+ */
+ if (endptr <= buf + 12)
+ {
+ png_warning(png_ptr, "Invalid pCAL data");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ png_debug(3, "Reading pCAL X0, X1, type, nparams, and units");
+ X0 = png_get_int_32((png_bytep)buf+1);
+ X1 = png_get_int_32((png_bytep)buf+5);
+ type = buf[9];
+ nparams = buf[10];
+ units = buf + 11;
+
+ png_debug(3, "Checking pCAL equation type and number of parameters");
+ /* Check that we have the right number of parameters for known
+ * equation types.
+ */
+ if ((type == PNG_EQUATION_LINEAR && nparams != 2) ||
+ (type == PNG_EQUATION_BASE_E && nparams != 3) ||
+ (type == PNG_EQUATION_ARBITRARY && nparams != 3) ||
+ (type == PNG_EQUATION_HYPERBOLIC && nparams != 4))
+ {
+ png_warning(png_ptr, "Invalid pCAL parameters for equation type");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ else if (type >= PNG_EQUATION_LAST)
+ {
+ png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
+ }
+
+ for (buf = units; *buf; buf++)
+ /* Empty loop to move past the units string. */ ;
+
+ png_debug(3, "Allocating pCAL parameters array");
+
+ params = (png_charpp)png_malloc_warn(png_ptr,
+ (png_size_t)(nparams * png_sizeof(png_charp)));
+
+ if (params == NULL)
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_warning(png_ptr, "No memory for pCAL params");
+ return;
+ }
+
+ /* Get pointers to the start of each parameter string. */
+ for (i = 0; i < (int)nparams; i++)
+ {
+ buf++; /* Skip the null string terminator from previous parameter. */
+
+ png_debug1(3, "Reading pCAL parameter %d", i);
+
+ for (params[i] = buf; buf <= endptr && *buf != 0x00; buf++)
+ /* Empty loop to move past each parameter string */ ;
+
+ /* Make sure we haven't run out of data yet */
+ if (buf > endptr)
+ {
+ png_warning(png_ptr, "Invalid pCAL data");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_free(png_ptr, params);
+ return;
+ }
+ }
+
+ png_set_pCAL(png_ptr, info_ptr, png_ptr->chunkdata, X0, X1, type, nparams,
+ units, params);
+
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_free(png_ptr, params);
+}
+#endif
+
+#ifdef PNG_READ_sCAL_SUPPORTED
+/* Read the sCAL chunk */
+void /* PRIVATE */
+png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_size_t slength, i;
+ int state;
+
+ png_debug(1, "in png_handle_sCAL");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before sCAL");
+
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid sCAL after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ png_warning(png_ptr, "Duplicate sCAL chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_debug1(2, "Allocating and reading sCAL chunk data (%u bytes)",
+ length + 1);
+
+ png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
+ if (png_ptr->chunkdata == NULL)
+ {
+ png_warning(png_ptr, "Out of memory while processing sCAL chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+ png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
+
+ if (png_crc_finish(png_ptr, 0))
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ /* Validate the unit. */
+ if (png_ptr->chunkdata[0] != 1 && png_ptr->chunkdata[0] != 2)
+ {
+ png_warning(png_ptr, "Invalid sCAL ignored: invalid unit");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ /* Validate the ASCII numbers, need two ASCII numbers separated by
+ * a '\0' and they need to fit exactly in the chunk data.
+ */
+ i = 0;
+ state = 0;
+
+ if (png_ptr->chunkdata[1] == 45 /* negative width */ ||
+ !png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) ||
+ i >= slength || png_ptr->chunkdata[i++] != 0)
+ png_warning(png_ptr, "Invalid sCAL chunk ignored: bad width format");
+
+ else
+ {
+ png_size_t heighti = i;
+
+ if (png_ptr->chunkdata[i] == 45 /* negative height */ ||
+ !png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) ||
+ i != slength)
+ png_warning(png_ptr, "Invalid sCAL chunk ignored: bad height format");
+
+ else
+ /* This is the (only) success case. */
+ png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0],
+ png_ptr->chunkdata+1, png_ptr->chunkdata+heighti);
+ }
+
+ /* Clean up - just free the temporarily allocated buffer. */
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+}
+#endif
+
+#ifdef PNG_READ_tIME_SUPPORTED
+void /* PRIVATE */
+png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_byte buf[7];
+ png_time mod_time;
+
+ png_debug(1, "in png_handle_tIME");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Out of place tIME chunk");
+
+ else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME))
+ {
+ png_warning(png_ptr, "Duplicate tIME chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (png_ptr->mode & PNG_HAVE_IDAT)
+ png_ptr->mode |= PNG_AFTER_IDAT;
+
+ if (length != 7)
+ {
+ png_warning(png_ptr, "Incorrect tIME chunk length");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_crc_read(png_ptr, buf, 7);
+
+ if (png_crc_finish(png_ptr, 0))
+ return;
+
+ mod_time.second = buf[6];
+ mod_time.minute = buf[5];
+ mod_time.hour = buf[4];
+ mod_time.day = buf[3];
+ mod_time.month = buf[2];
+ mod_time.year = png_get_uint_16(buf);
+
+ png_set_tIME(png_ptr, info_ptr, &mod_time);
+}
+#endif
+
+#ifdef PNG_READ_tEXt_SUPPORTED
+/* Note: this does not properly handle chunks that are > 64K under DOS */
+void /* PRIVATE */
+png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_textp text_ptr;
+ png_charp key;
+ png_charp text;
+ png_uint_32 skip = 0;
+ png_size_t slength;
+ int ret;
+
+ png_debug(1, "in png_handle_tEXt");
+
+#ifdef PNG_USER_LIMITS_SUPPORTED
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for tEXt");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before tEXt");
+
+ if (png_ptr->mode & PNG_HAVE_IDAT)
+ png_ptr->mode |= PNG_AFTER_IDAT;
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "tEXt chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ png_free(png_ptr, png_ptr->chunkdata);
+
+ png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
+ if (png_ptr->chunkdata == NULL)
+ {
+ png_warning(png_ptr, "No memory to process text chunk");
+ return;
+ }
+
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+
+ if (png_crc_finish(png_ptr, skip))
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ key = png_ptr->chunkdata;
+
+ key[slength] = 0x00;
+
+ for (text = key; *text; text++)
+ /* Empty loop to find end of key */ ;
+
+ if (text != key + slength)
+ text++;
+
+ text_ptr = (png_textp)png_malloc_warn(png_ptr,
+ png_sizeof(png_text));
+
+ if (text_ptr == NULL)
+ {
+ png_warning(png_ptr, "Not enough memory to process text chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
+ text_ptr->key = key;
+ text_ptr->lang = NULL;
+ text_ptr->lang_key = NULL;
+ text_ptr->itxt_length = 0;
+ text_ptr->text = text;
+ text_ptr->text_length = png_strlen(text);
+
+ ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_free(png_ptr, text_ptr);
+
+ if (ret)
+ png_warning(png_ptr, "Insufficient memory to process text chunk");
+}
+#endif
+
+#ifdef PNG_READ_zTXt_SUPPORTED
+/* Note: this does not correctly handle chunks that are > 64K under DOS */
+void /* PRIVATE */
+png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_textp text_ptr;
+ png_charp text;
+ int comp_type;
+ int ret;
+ png_size_t slength, prefix_len, data_len;
+
+ png_debug(1, "in png_handle_zTXt");
+
+#ifdef PNG_USER_LIMITS_SUPPORTED
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for zTXt");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before zTXt");
+
+ if (png_ptr->mode & PNG_HAVE_IDAT)
+ png_ptr->mode |= PNG_AFTER_IDAT;
+
+#ifdef PNG_MAX_MALLOC_64K
+ /* We will no doubt have problems with chunks even half this size, but
+ * there is no hard and fast rule to tell us where to stop.
+ */
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "zTXt chunk too large to fit in memory");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+#endif
+
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
+ if (png_ptr->chunkdata == NULL)
+ {
+ png_warning(png_ptr, "Out of memory processing zTXt chunk");
+ return;
+ }
+
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+
+ if (png_crc_finish(png_ptr, 0))
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ png_ptr->chunkdata[slength] = 0x00;
+
+ for (text = png_ptr->chunkdata; *text; text++)
+ /* Empty loop */ ;
+
+ /* zTXt must have some text after the chunkdataword */
+ if (text >= png_ptr->chunkdata + slength - 2)
+ {
+ png_warning(png_ptr, "Truncated zTXt chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ else
+ {
+ comp_type = *(++text);
+
+ if (comp_type != PNG_TEXT_COMPRESSION_zTXt)
+ {
+ png_warning(png_ptr, "Unknown compression type in zTXt chunk");
+ comp_type = PNG_TEXT_COMPRESSION_zTXt;
+ }
+
+ text++; /* Skip the compression_method byte */
+ }
+
+ prefix_len = text - png_ptr->chunkdata;
+
+ png_decompress_chunk(png_ptr, comp_type,
+ (png_size_t)length, prefix_len, &data_len);
+
+ text_ptr = (png_textp)png_malloc_warn(png_ptr,
+ png_sizeof(png_text));
+
+ if (text_ptr == NULL)
+ {
+ png_warning(png_ptr, "Not enough memory to process zTXt chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ text_ptr->compression = comp_type;
+ text_ptr->key = png_ptr->chunkdata;
+ text_ptr->lang = NULL;
+ text_ptr->lang_key = NULL;
+ text_ptr->itxt_length = 0;
+ text_ptr->text = png_ptr->chunkdata + prefix_len;
+ text_ptr->text_length = data_len;
+
+ ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+
+ png_free(png_ptr, text_ptr);
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+
+ if (ret)
+ png_error(png_ptr, "Insufficient memory to store zTXt chunk");
+}
+#endif
+
+#ifdef PNG_READ_iTXt_SUPPORTED
+/* Note: this does not correctly handle chunks that are > 64K under DOS */
+void /* PRIVATE */
+png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_textp text_ptr;
+ png_charp key, lang, text, lang_key;
+ int comp_flag;
+ int comp_type = 0;
+ int ret;
+ png_size_t slength, prefix_len, data_len;
+
+ png_debug(1, "in png_handle_iTXt");
+
+#ifdef PNG_USER_LIMITS_SUPPORTED
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for iTXt");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before iTXt");
+
+ if (png_ptr->mode & PNG_HAVE_IDAT)
+ png_ptr->mode |= PNG_AFTER_IDAT;
+
+#ifdef PNG_MAX_MALLOC_64K
+ /* We will no doubt have problems with chunks even half this size, but
+ * there is no hard and fast rule to tell us where to stop.
+ */
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "iTXt chunk too large to fit in memory");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+#endif
+
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
+ if (png_ptr->chunkdata == NULL)
+ {
+ png_warning(png_ptr, "No memory to process iTXt chunk");
+ return;
+ }
+
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+
+ if (png_crc_finish(png_ptr, 0))
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ png_ptr->chunkdata[slength] = 0x00;
+
+ for (lang = png_ptr->chunkdata; *lang; lang++)
+ /* Empty loop */ ;
+
+ lang++; /* Skip NUL separator */
+
+ /* iTXt must have a language tag (possibly empty), two compression bytes,
+ * translated keyword (possibly empty), and possibly some text after the
+ * keyword
+ */
+
+ if (lang >= png_ptr->chunkdata + slength - 3)
+ {
+ png_warning(png_ptr, "Truncated iTXt chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ else
+ {
+ comp_flag = *lang++;
+ comp_type = *lang++;
+ }
+
+ for (lang_key = lang; *lang_key; lang_key++)
+ /* Empty loop */ ;
+
+ lang_key++; /* Skip NUL separator */
+
+ if (lang_key >= png_ptr->chunkdata + slength)
+ {
+ png_warning(png_ptr, "Truncated iTXt chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ for (text = lang_key; *text; text++)
+ /* Empty loop */ ;
+
+ text++; /* Skip NUL separator */
+
+ if (text >= png_ptr->chunkdata + slength)
+ {
+ png_warning(png_ptr, "Malformed iTXt chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ prefix_len = text - png_ptr->chunkdata;
+
+ key=png_ptr->chunkdata;
+
+ if (comp_flag)
+ png_decompress_chunk(png_ptr, comp_type,
+ (size_t)length, prefix_len, &data_len);
+
+ else
+ data_len = png_strlen(png_ptr->chunkdata + prefix_len);
+
+ text_ptr = (png_textp)png_malloc_warn(png_ptr,
+ png_sizeof(png_text));
+
+ if (text_ptr == NULL)
+ {
+ png_warning(png_ptr, "Not enough memory to process iTXt chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ text_ptr->compression = (int)comp_flag + 1;
+ text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key);
+ text_ptr->lang = png_ptr->chunkdata + (lang - key);
+ text_ptr->itxt_length = data_len;
+ text_ptr->text_length = 0;
+ text_ptr->key = png_ptr->chunkdata;
+ text_ptr->text = png_ptr->chunkdata + prefix_len;
+
+ ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+
+ png_free(png_ptr, text_ptr);
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+
+ if (ret)
+ png_error(png_ptr, "Insufficient memory to store iTXt chunk");
+}
+#endif
+
+/* This function is called when we haven't found a handler for a
+ * chunk. If there isn't a problem with the chunk itself (ie bad
+ * chunk name, CRC, or a critical chunk), the chunk is silently ignored
+ * -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which
+ * case it will be saved away to be written out later.
+ */
+void /* PRIVATE */
+png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_uint_32 skip = 0;
+
+ png_debug(1, "in png_handle_unknown");
+
+#ifdef PNG_USER_LIMITS_SUPPORTED
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for unknown chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
+
+ if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ PNG_IDAT;
+
+ if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* Not an IDAT */
+ png_ptr->mode |= PNG_AFTER_IDAT;
+ }
+
+ if (!(png_ptr->chunk_name[0] & 0x20))
+ {
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ PNG_HANDLE_CHUNK_ALWAYS
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
+ && png_ptr->read_user_chunk_fn == NULL
+#endif
+ )
+#endif
+ png_chunk_error(png_ptr, "unknown critical chunk");
+ }
+
+#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
+ if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
+ || (png_ptr->read_user_chunk_fn != NULL)
+#endif
+ )
+ {
+#ifdef PNG_MAX_MALLOC_64K
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "unknown chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ png_memcpy((png_charp)png_ptr->unknown_chunk.name,
+ (png_charp)png_ptr->chunk_name,
+ png_sizeof(png_ptr->unknown_chunk.name));
+
+ png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1]
+ = '\0';
+
+ png_ptr->unknown_chunk.size = (png_size_t)length;
+
+ if (length == 0)
+ png_ptr->unknown_chunk.data = NULL;
+
+ else
+ {
+ png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
+ png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
+ }
+
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
+ if (png_ptr->read_user_chunk_fn != NULL)
+ {
+ /* Callback to user unknown chunk handler */
+ int ret;
+
+ ret = (*(png_ptr->read_user_chunk_fn))
+ (png_ptr, &png_ptr->unknown_chunk);
+
+ if (ret < 0)
+ png_chunk_error(png_ptr, "error in user chunk");
+
+ if (ret == 0)
+ {
+ if (!(png_ptr->chunk_name[0] & 0x20))
+ {
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ PNG_HANDLE_CHUNK_ALWAYS)
+#endif
+ png_chunk_error(png_ptr, "unknown critical chunk");
+ }
+
+ png_set_unknown_chunks(png_ptr, info_ptr,
+ &png_ptr->unknown_chunk, 1);
+ }
+ }
+
+ else
+#endif
+ png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
+
+ png_free(png_ptr, png_ptr->unknown_chunk.data);
+ png_ptr->unknown_chunk.data = NULL;
+ }
+
+ else
+#endif
+ skip = length;
+
+ png_crc_finish(png_ptr, skip);
+
+#ifndef PNG_READ_USER_CHUNKS_SUPPORTED
+ PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */
+#endif
+}
+
+/* This function is called to verify that a chunk name is valid.
+ * This function can't have the "critical chunk check" incorporated
+ * into it, since in the future we will need to be able to call user
+ * functions to handle unknown critical chunks after we check that
+ * the chunk name itself is valid.
+ */
+
+#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
+
+void /* PRIVATE */
+png_check_chunk_name(png_structp png_ptr, png_const_bytep chunk_name)
+{
+ png_debug(1, "in png_check_chunk_name");
+ if (isnonalpha(chunk_name[0]) || isnonalpha(chunk_name[1]) ||
+ isnonalpha(chunk_name[2]) || isnonalpha(chunk_name[3]))
+ {
+ png_chunk_error(png_ptr, "invalid chunk type");
+ }
+}
+
+/* Combines the row recently read in with the existing pixels in the
+ * row. This routine takes care of alpha and transparency if requested.
+ * This routine also handles the two methods of progressive display
+ * of interlaced images, depending on the mask value.
+ * The mask value describes which pixels are to be combined with
+ * the row. The pattern always repeats every 8 pixels, so just 8
+ * bits are needed. A one indicates the pixel is to be combined,
+ * a zero indicates the pixel is to be skipped. This is in addition
+ * to any alpha or transparency value associated with the pixel. If
+ * you want all pixels to be combined, pass 0xff (255) in mask.
+ */
+
+void /* PRIVATE */
+png_combine_row(png_structp png_ptr, png_bytep row, int mask)
+{
+ png_debug(1, "in png_combine_row");
+
+ if (mask == 0xff)
+ {
+ png_memcpy(row, png_ptr->row_buf + 1,
+ PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width));
+ }
+
+ else
+ {
+ switch (png_ptr->row_info.pixel_depth)
+ {
+ case 1:
+ {
+ png_bytep sp = png_ptr->row_buf + 1;
+ png_bytep dp = row;
+ int s_inc, s_start, s_end;
+ int m = 0x80;
+ int shift;
+ png_uint_32 i;
+ png_uint_32 row_width = png_ptr->width;
+
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
+ if (png_ptr->transformations & PNG_PACKSWAP)
+ {
+ s_start = 0;
+ s_end = 7;
+ s_inc = 1;
+ }
+
+ else
+#endif
+ {
+ s_start = 7;
+ s_end = 0;
+ s_inc = -1;
+ }
+
+ shift = s_start;
+
+ for (i = 0; i < row_width; i++)
+ {
+ if (m & mask)
+ {
+ int value;
+
+ value = (*sp >> shift) & 0x01;
+ *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
+ *dp |= (png_byte)(value << shift);
+ }
+
+ if (shift == s_end)
+ {
+ shift = s_start;
+ sp++;
+ dp++;
+ }
+
+ else
+ shift += s_inc;
+
+ if (m == 1)
+ m = 0x80;
+
+ else
+ m >>= 1;
+ }
+ break;
+ }
+
+ case 2:
+ {
+ png_bytep sp = png_ptr->row_buf + 1;
+ png_bytep dp = row;
+ int s_start, s_end, s_inc;
+ int m = 0x80;
+ int shift;
+ png_uint_32 i;
+ png_uint_32 row_width = png_ptr->width;
+ int value;
+
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
+ if (png_ptr->transformations & PNG_PACKSWAP)
+ {
+ s_start = 0;
+ s_end = 6;
+ s_inc = 2;
+ }
+
+ else
+#endif
+ {
+ s_start = 6;
+ s_end = 0;
+ s_inc = -2;
+ }
+
+ shift = s_start;
+
+ for (i = 0; i < row_width; i++)
+ {
+ if (m & mask)
+ {
+ value = (*sp >> shift) & 0x03;
+ *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
+ *dp |= (png_byte)(value << shift);
+ }
+
+ if (shift == s_end)
+ {
+ shift = s_start;
+ sp++;
+ dp++;
+ }
+
+ else
+ shift += s_inc;
+
+ if (m == 1)
+ m = 0x80;
+
+ else
+ m >>= 1;
+ }
+ break;
+ }
+
+ case 4:
+ {
+ png_bytep sp = png_ptr->row_buf + 1;
+ png_bytep dp = row;
+ int s_start, s_end, s_inc;
+ int m = 0x80;
+ int shift;
+ png_uint_32 i;
+ png_uint_32 row_width = png_ptr->width;
+ int value;
+
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
+ if (png_ptr->transformations & PNG_PACKSWAP)
+ {
+ s_start = 0;
+ s_end = 4;
+ s_inc = 4;
+ }
+
+ else
+#endif
+ {
+ s_start = 4;
+ s_end = 0;
+ s_inc = -4;
+ }
+ shift = s_start;
+
+ for (i = 0; i < row_width; i++)
+ {
+ if (m & mask)
+ {
+ value = (*sp >> shift) & 0xf;
+ *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
+ *dp |= (png_byte)(value << shift);
+ }
+
+ if (shift == s_end)
+ {
+ shift = s_start;
+ sp++;
+ dp++;
+ }
+
+ else
+ shift += s_inc;
+
+ if (m == 1)
+ m = 0x80;
+
+ else
+ m >>= 1;
+ }
+ break;
+ }
+
+ default:
+ {
+ png_bytep sp = png_ptr->row_buf + 1;
+ png_bytep dp = row;
+ png_size_t pixel_bytes = (png_ptr->row_info.pixel_depth >> 3);
+ png_uint_32 i;
+ png_uint_32 row_width = png_ptr->width;
+ png_byte m = 0x80;
+
+ for (i = 0; i < row_width; i++)
+ {
+ if (m & mask)
+ {
+ png_memcpy(dp, sp, pixel_bytes);
+ }
+
+ sp += pixel_bytes;
+ dp += pixel_bytes;
+
+ if (m == 1)
+ m = 0x80;
+
+ else
+ m >>= 1;
+ }
+ break;
+ }
+ }
+ }
+}
+
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+void /* PRIVATE */
+png_do_read_interlace(png_structp png_ptr)
+{
+ png_row_infop row_info = &(png_ptr->row_info);
+ png_bytep row = png_ptr->row_buf + 1;
+ int pass = png_ptr->pass;
+ png_uint_32 transformations = png_ptr->transformations;
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+ /* Offset to next interlace block */
+ PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ png_debug(1, "in png_do_read_interlace");
+ if (row != NULL && row_info != NULL)
+ {
+ png_uint_32 final_width;
+
+ final_width = row_info->width * png_pass_inc[pass];
+
+ switch (row_info->pixel_depth)
+ {
+ case 1:
+ {
+ png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 3);
+ png_bytep dp = row + (png_size_t)((final_width - 1) >> 3);
+ int sshift, dshift;
+ int s_start, s_end, s_inc;
+ int jstop = png_pass_inc[pass];
+ png_byte v;
+ png_uint_32 i;
+ int j;
+
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
+ if (transformations & PNG_PACKSWAP)
+ {
+ sshift = (int)((row_info->width + 7) & 0x07);
+ dshift = (int)((final_width + 7) & 0x07);
+ s_start = 7;
+ s_end = 0;
+ s_inc = -1;
+ }
+
+ else
+#endif
+ {
+ sshift = 7 - (int)((row_info->width + 7) & 0x07);
+ dshift = 7 - (int)((final_width + 7) & 0x07);
+ s_start = 0;
+ s_end = 7;
+ s_inc = 1;
+ }
+
+ for (i = 0; i < row_info->width; i++)
+ {
+ v = (png_byte)((*sp >> sshift) & 0x01);
+ for (j = 0; j < jstop; j++)
+ {
+ *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);
+ *dp |= (png_byte)(v << dshift);
+
+ if (dshift == s_end)
+ {
+ dshift = s_start;
+ dp--;
+ }
+
+ else
+ dshift += s_inc;
+ }
+
+ if (sshift == s_end)
+ {
+ sshift = s_start;
+ sp--;
+ }
+
+ else
+ sshift += s_inc;
+ }
+ break;
+ }
+
+ case 2:
+ {
+ png_bytep sp = row + (png_uint_32)((row_info->width - 1) >> 2);
+ png_bytep dp = row + (png_uint_32)((final_width - 1) >> 2);
+ int sshift, dshift;
+ int s_start, s_end, s_inc;
+ int jstop = png_pass_inc[pass];
+ png_uint_32 i;
+
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
+ if (transformations & PNG_PACKSWAP)
+ {
+ sshift = (int)(((row_info->width + 3) & 0x03) << 1);
+ dshift = (int)(((final_width + 3) & 0x03) << 1);
+ s_start = 6;
+ s_end = 0;
+ s_inc = -2;
+ }
+
+ else
+#endif
+ {
+ sshift = (int)((3 - ((row_info->width + 3) & 0x03)) << 1);
+ dshift = (int)((3 - ((final_width + 3) & 0x03)) << 1);
+ s_start = 0;
+ s_end = 6;
+ s_inc = 2;
+ }
+
+ for (i = 0; i < row_info->width; i++)
+ {
+ png_byte v;
+ int j;
+
+ v = (png_byte)((*sp >> sshift) & 0x03);
+ for (j = 0; j < jstop; j++)
+ {
+ *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff);
+ *dp |= (png_byte)(v << dshift);
+
+ if (dshift == s_end)
+ {
+ dshift = s_start;
+ dp--;
+ }
+
+ else
+ dshift += s_inc;
+ }
+
+ if (sshift == s_end)
+ {
+ sshift = s_start;
+ sp--;
+ }
+
+ else
+ sshift += s_inc;
+ }
+ break;
+ }
+
+ case 4:
+ {
+ png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 1);
+ png_bytep dp = row + (png_size_t)((final_width - 1) >> 1);
+ int sshift, dshift;
+ int s_start, s_end, s_inc;
+ png_uint_32 i;
+ int jstop = png_pass_inc[pass];
+
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
+ if (transformations & PNG_PACKSWAP)
+ {
+ sshift = (int)(((row_info->width + 1) & 0x01) << 2);
+ dshift = (int)(((final_width + 1) & 0x01) << 2);
+ s_start = 4;
+ s_end = 0;
+ s_inc = -4;
+ }
+
+ else
+#endif
+ {
+ sshift = (int)((1 - ((row_info->width + 1) & 0x01)) << 2);
+ dshift = (int)((1 - ((final_width + 1) & 0x01)) << 2);
+ s_start = 0;
+ s_end = 4;
+ s_inc = 4;
+ }
+
+ for (i = 0; i < row_info->width; i++)
+ {
+ png_byte v = (png_byte)((*sp >> sshift) & 0xf);
+ int j;
+
+ for (j = 0; j < jstop; j++)
+ {
+ *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff);
+ *dp |= (png_byte)(v << dshift);
+
+ if (dshift == s_end)
+ {
+ dshift = s_start;
+ dp--;
+ }
+
+ else
+ dshift += s_inc;
+ }
+
+ if (sshift == s_end)
+ {
+ sshift = s_start;
+ sp--;
+ }
+
+ else
+ sshift += s_inc;
+ }
+ break;
+ }
+ default:
+ {
+ png_size_t pixel_bytes = (row_info->pixel_depth >> 3);
+
+ png_bytep sp = row + (png_size_t)(row_info->width - 1)
+ * pixel_bytes;
+
+ png_bytep dp = row + (png_size_t)(final_width - 1) * pixel_bytes;
+
+ int jstop = png_pass_inc[pass];
+ png_uint_32 i;
+
+ for (i = 0; i < row_info->width; i++)
+ {
+ png_byte v[8];
+ int j;
+
+ png_memcpy(v, sp, pixel_bytes);
+
+ for (j = 0; j < jstop; j++)
+ {
+ png_memcpy(dp, v, pixel_bytes);
+ dp -= pixel_bytes;
+ }
+
+ sp -= pixel_bytes;
+ }
+ break;
+ }
+ }
+ row_info->width = final_width;
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width);
+ }
+#ifndef PNG_READ_PACKSWAP_SUPPORTED
+ PNG_UNUSED(transformations) /* Silence compiler warning */
+#endif
+}
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
+
+void /* PRIVATE */
+png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
+ png_const_bytep prev_row, int filter)
+{
+ png_debug(1, "in png_read_filter_row");
+ png_debug2(2, "row = %u, filter = %d", png_ptr->row_number, filter);
+ switch (filter)
+ {
+ case PNG_FILTER_VALUE_NONE:
+ break;
+
+ case PNG_FILTER_VALUE_SUB:
+ {
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+ unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
+ png_bytep rp = row + bpp;
+ png_bytep lp = row;
+
+ for (i = bpp; i < istop; i++)
+ {
+ *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff);
+ rp++;
+ }
+ break;
+ }
+ case PNG_FILTER_VALUE_UP:
+ {
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+ png_bytep rp = row;
+ png_const_bytep pp = prev_row;
+
+ for (i = 0; i < istop; i++)
+ {
+ *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
+ rp++;
+ }
+ break;
+ }
+ case PNG_FILTER_VALUE_AVG:
+ {
+ png_size_t i;
+ png_bytep rp = row;
+ png_const_bytep pp = prev_row;
+ png_bytep lp = row;
+ unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
+ png_size_t istop = row_info->rowbytes - bpp;
+
+ for (i = 0; i < bpp; i++)
+ {
+ *rp = (png_byte)(((int)(*rp) +
+ ((int)(*pp++) / 2 )) & 0xff);
+
+ rp++;
+ }
+
+ for (i = 0; i < istop; i++)
+ {
+ *rp = (png_byte)(((int)(*rp) +
+ (int)(*pp++ + *lp++) / 2 ) & 0xff);
+
+ rp++;
+ }
+ break;
+ }
+ case PNG_FILTER_VALUE_PAETH:
+ {
+ png_size_t i;
+ png_bytep rp = row;
+ png_const_bytep pp = prev_row;
+ png_bytep lp = row;
+ png_const_bytep cp = prev_row;
+ unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
+ png_size_t istop=row_info->rowbytes - bpp;
+
+ for (i = 0; i < bpp; i++)
+ {
+ *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
+ rp++;
+ }
+
+ for (i = 0; i < istop; i++) /* Use leftover rp,pp */
+ {
+ int a, b, c, pa, pb, pc, p;
+
+ a = *lp++;
+ b = *pp++;
+ c = *cp++;
+
+ p = b - c;
+ pc = a - c;
+
+#ifdef PNG_USE_ABS
+ pa = abs(p);
+ pb = abs(pc);
+ pc = abs(p + pc);
+#else
+ pa = p < 0 ? -p : p;
+ pb = pc < 0 ? -pc : pc;
+ pc = (p + pc) < 0 ? -(p + pc) : p + pc;
+#endif
+
+ /*
+ if (pa <= pb && pa <= pc)
+ p = a;
+
+ else if (pb <= pc)
+ p = b;
+
+ else
+ p = c;
+ */
+
+ p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c;
+
+ *rp = (png_byte)(((int)(*rp) + p) & 0xff);
+ rp++;
+ }
+ break;
+ }
+ default:
+ png_error(png_ptr, "Ignoring bad adaptive filter type");
+ /*NOT REACHED */
+ break;
+ }
+}
+
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
+void /* PRIVATE */
+png_read_finish_row(png_structp png_ptr)
+{
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* Start of interlace block */
+ PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* Offset to next interlace block */
+ PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* Start of interlace block in the y direction */
+ PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* Offset to next interlace block in the y direction */
+ PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
+
+ png_debug(1, "in png_read_finish_row");
+ png_ptr->row_number++;
+ if (png_ptr->row_number < png_ptr->num_rows)
+ return;
+
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ if (png_ptr->interlaced)
+ {
+ png_ptr->row_number = 0;
+
+ png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
+
+ do
+ {
+ png_ptr->pass++;
+
+ if (png_ptr->pass >= 7)
+ break;
+
+ png_ptr->iwidth = (png_ptr->width +
+ png_pass_inc[png_ptr->pass] - 1 -
+ png_pass_start[png_ptr->pass]) /
+ png_pass_inc[png_ptr->pass];
+
+ if (!(png_ptr->transformations & PNG_INTERLACE))
+ {
+ png_ptr->num_rows = (png_ptr->height +
+ png_pass_yinc[png_ptr->pass] - 1 -
+ png_pass_ystart[png_ptr->pass]) /
+ png_pass_yinc[png_ptr->pass];
+ }
+
+ else /* if (png_ptr->transformations & PNG_INTERLACE) */
+ break; /* libpng deinterlacing sees every row */
+
+ } while (png_ptr->num_rows == 0 || png_ptr->iwidth == 0);
+
+ if (png_ptr->pass < 7)
+ return;
+ }
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
+
+ if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
+ {
+ PNG_IDAT;
+ char extra;
+ int ret;
+
+ png_ptr->zstream.next_out = (Byte *)&extra;
+ png_ptr->zstream.avail_out = (uInt)1;
+
+ for (;;)
+ {
+ if (!(png_ptr->zstream.avail_in))
+ {
+ while (!png_ptr->idat_size)
+ {
+ png_crc_finish(png_ptr, 0);
+ png_ptr->idat_size = png_read_chunk_header(png_ptr);
+ if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ png_error(png_ptr, "Not enough image data");
+ }
+
+ png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_in = png_ptr->zbuf;
+
+ if (png_ptr->zbuf_size > png_ptr->idat_size)
+ png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size;
+
+ png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in);
+ png_ptr->idat_size -= png_ptr->zstream.avail_in;
+ }
+
+ ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
+
+ if (ret == Z_STREAM_END)
+ {
+ if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in ||
+ png_ptr->idat_size)
+ png_warning(png_ptr, "Extra compressed data");
+
+ png_ptr->mode |= PNG_AFTER_IDAT;
+ png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+ break;
+ }
+
+ if (ret != Z_OK)
+ png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg :
+ "Decompression Error");
+
+ if (!(png_ptr->zstream.avail_out))
+ {
+ png_warning(png_ptr, "Extra compressed data");
+ png_ptr->mode |= PNG_AFTER_IDAT;
+ png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+ break;
+ }
+
+ }
+ png_ptr->zstream.avail_out = 0;
+ }
+
+ if (png_ptr->idat_size || png_ptr->zstream.avail_in)
+ png_warning(png_ptr, "Extra compression data");
+
+ inflateReset(&png_ptr->zstream);
+
+ png_ptr->mode |= PNG_AFTER_IDAT;
+}
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+
+void /* PRIVATE */
+png_read_start_row(png_structp png_ptr)
+{
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* Start of interlace block */
+ PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* Offset to next interlace block */
+ PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* Start of interlace block in the y direction */
+ PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* Offset to next interlace block in the y direction */
+ PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+#endif
+
+ int max_pixel_depth;
+ png_size_t row_bytes;
+
+ png_debug(1, "in png_read_start_row");
+ png_ptr->zstream.avail_in = 0;
+ png_init_read_transformations(png_ptr);
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+ if (png_ptr->interlaced)
+ {
+ if (!(png_ptr->transformations & PNG_INTERLACE))
+ png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
+ png_pass_ystart[0]) / png_pass_yinc[0];
+
+ else
+ png_ptr->num_rows = png_ptr->height;
+
+ png_ptr->iwidth = (png_ptr->width +
+ png_pass_inc[png_ptr->pass] - 1 -
+ png_pass_start[png_ptr->pass]) /
+ png_pass_inc[png_ptr->pass];
+ }
+
+ else
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
+ {
+ png_ptr->num_rows = png_ptr->height;
+ png_ptr->iwidth = png_ptr->width;
+ }
+
+ max_pixel_depth = png_ptr->pixel_depth;
+
+#ifdef PNG_READ_PACK_SUPPORTED
+ if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8)
+ max_pixel_depth = 8;
+#endif
+
+#ifdef PNG_READ_EXPAND_SUPPORTED
+ if (png_ptr->transformations & PNG_EXPAND)
+ {
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (png_ptr->num_trans)
+ max_pixel_depth = 32;
+
+ else
+ max_pixel_depth = 24;
+ }
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
+ {
+ if (max_pixel_depth < 8)
+ max_pixel_depth = 8;
+
+ if (png_ptr->num_trans)
+ max_pixel_depth *= 2;
+ }
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
+ {
+ if (png_ptr->num_trans)
+ {
+ max_pixel_depth *= 4;
+ max_pixel_depth /= 3;
+ }
+ }
+ }
+#endif
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+ if (png_ptr->transformations & PNG_EXPAND_16)
+ {
+# ifdef PNG_READ_EXPAND_SUPPORTED
+ /* In fact it is an error if it isn't supported, but checking is
+ * the safe way.
+ */
+ if (png_ptr->transformations & PNG_EXPAND)
+ {
+ if (png_ptr->bit_depth < 16)
+ max_pixel_depth *= 2;
+ }
+ else
+# endif
+ png_ptr->transformations &= ~PNG_EXPAND_16;
+ }
+#endif
+
+#ifdef PNG_READ_FILLER_SUPPORTED
+ if (png_ptr->transformations & (PNG_FILLER))
+ {
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ max_pixel_depth = 32;
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
+ {
+ if (max_pixel_depth <= 8)
+ max_pixel_depth = 16;
+
+ else
+ max_pixel_depth = 32;
+ }
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
+ {
+ if (max_pixel_depth <= 32)
+ max_pixel_depth = 32;
+
+ else
+ max_pixel_depth = 64;
+ }
+ }
+#endif
+
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+ if (png_ptr->transformations & PNG_GRAY_TO_RGB)
+ {
+ if (
+#ifdef PNG_READ_EXPAND_SUPPORTED
+ (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) ||
+#endif
+#ifdef PNG_READ_FILLER_SUPPORTED
+ (png_ptr->transformations & (PNG_FILLER)) ||
+#endif
+ png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ {
+ if (max_pixel_depth <= 16)
+ max_pixel_depth = 32;
+
+ else
+ max_pixel_depth = 64;
+ }
+
+ else
+ {
+ if (max_pixel_depth <= 8)
+ {
+ if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ max_pixel_depth = 32;
+
+ else
+ max_pixel_depth = 24;
+ }
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ max_pixel_depth = 64;
+
+ else
+ max_pixel_depth = 48;
+ }
+ }
+#endif
+
+#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \
+defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
+ if (png_ptr->transformations & PNG_USER_TRANSFORM)
+ {
+ int user_pixel_depth = png_ptr->user_transform_depth*
+ png_ptr->user_transform_channels;
+
+ if (user_pixel_depth > max_pixel_depth)
+ max_pixel_depth=user_pixel_depth;
+ }
+#endif
+
+ /* Align the width on the next larger 8 pixels. Mainly used
+ * for interlacing
+ */
+ row_bytes = ((png_ptr->width + 7) & ~((png_uint_32)7));
+ /* Calculate the maximum bytes needed, adding a byte and a pixel
+ * for safety's sake
+ */
+ row_bytes = PNG_ROWBYTES(max_pixel_depth, row_bytes) +
+ 1 + ((max_pixel_depth + 7) >> 3);
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (row_bytes > (png_uint_32)65536L)
+ png_error(png_ptr, "This image requires a row greater than 64KB");
+#endif
+
+ if (row_bytes + 48 > png_ptr->old_big_row_buf_size)
+ {
+ png_free(png_ptr, png_ptr->big_row_buf);
+
+ if (png_ptr->interlaced)
+ png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr,
+ row_bytes + 48);
+
+ else
+ png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr,
+ row_bytes + 48);
+
+ png_ptr->old_big_row_buf_size = row_bytes + 48;
+
+#ifdef PNG_ALIGNED_MEMORY_SUPPORTED
+ /* Use 16-byte aligned memory for row_buf with at least 16 bytes
+ * of padding before and after row_buf.
+ */
+ png_ptr->row_buf = png_ptr->big_row_buf + 32 -
+ (((png_alloc_size_t)png_ptr->big_row_buf + 15) & 0x0F);
+
+ png_ptr->old_big_row_buf_size = row_bytes + 48;
+#else
+ /* Use 32 bytes of padding before and 16 bytes after row_buf. */
+ png_ptr->row_buf = png_ptr->big_row_buf + 32;
+#endif
+ png_ptr->old_big_row_buf_size = row_bytes + 48;
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (png_ptr->rowbytes > 65535)
+ png_error(png_ptr, "This image requires a row greater than 64KB");
+
+#endif
+ if (png_ptr->rowbytes > (PNG_SIZE_MAX - 1))
+ png_error(png_ptr, "Row has too many bytes to allocate in memory");
+
+ if (png_ptr->rowbytes + 1 > png_ptr->old_prev_row_size)
+ {
+ png_free(png_ptr, png_ptr->prev_row);
+
+ png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1);
+
+ png_ptr->old_prev_row_size = png_ptr->rowbytes + 1;
+ }
+
+ png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
+
+ png_debug1(3, "width = %u,", png_ptr->width);
+ png_debug1(3, "height = %u,", png_ptr->height);
+ png_debug1(3, "iwidth = %u,", png_ptr->iwidth);
+ png_debug1(3, "num_rows = %u,", png_ptr->num_rows);
+ png_debug1(3, "rowbytes = %lu,", (unsigned long)png_ptr->rowbytes);
+ png_debug1(3, "irowbytes = %lu",
+ (unsigned long)PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1);
+
+ png_ptr->flags |= PNG_FLAG_ROW_INIT;
+}
+#endif /* PNG_READ_SUPPORTED */
--- /dev/null
+
+/* pngset.c - storage of image information into info struct
+ *
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * The functions here are used during reads to store data from the file
+ * into the info struct, and during writes to store application data
+ * into the info struct for writing into the file. This abstracts the
+ * info struct and allows us to change the structure in the future.
+ */
+
+#include "pngpriv.h"
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
+#ifdef PNG_bKGD_SUPPORTED
+void PNGAPI
+png_set_bKGD(png_structp png_ptr, png_infop info_ptr,
+ png_const_color_16p background)
+{
+ png_debug1(1, "in %s storage function", "bKGD");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
+ info_ptr->valid |= PNG_INFO_bKGD;
+}
+#endif
+
+#ifdef PNG_cHRM_SUPPORTED
+void PNGFAPI
+png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
+ png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
+ png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
+ png_fixed_point blue_x, png_fixed_point blue_y)
+{
+ png_debug1(1, "in %s storage function", "cHRM fixed");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+# ifdef PNG_CHECK_cHRM_SUPPORTED
+ if (png_check_cHRM_fixed(png_ptr,
+ white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
+# endif
+ {
+ info_ptr->x_white = white_x;
+ info_ptr->y_white = white_y;
+ info_ptr->x_red = red_x;
+ info_ptr->y_red = red_y;
+ info_ptr->x_green = green_x;
+ info_ptr->y_green = green_y;
+ info_ptr->x_blue = blue_x;
+ info_ptr->y_blue = blue_y;
+ info_ptr->valid |= PNG_INFO_cHRM;
+ }
+}
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
+ double white_x, double white_y, double red_x, double red_y,
+ double green_x, double green_y, double blue_x, double blue_y)
+{
+ png_set_cHRM_fixed(png_ptr, info_ptr,
+ png_fixed(png_ptr, white_x, "cHRM White X"),
+ png_fixed(png_ptr, white_y, "cHRM White Y"),
+ png_fixed(png_ptr, red_x, "cHRM Red X"),
+ png_fixed(png_ptr, red_y, "cHRM Red Y"),
+ png_fixed(png_ptr, green_x, "cHRM Green X"),
+ png_fixed(png_ptr, green_y, "cHRM Green Y"),
+ png_fixed(png_ptr, blue_x, "cHRM Blue X"),
+ png_fixed(png_ptr, blue_y, "cHRM Blue Y"));
+}
+# endif /* PNG_FLOATING_POINT_SUPPORTED */
+
+#endif /* PNG_cHRM_SUPPORTED */
+
+#ifdef PNG_gAMA_SUPPORTED
+void PNGFAPI
+png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
+ file_gamma)
+{
+ png_debug1(1, "in %s storage function", "gAMA");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ /* Previously these values were limited, however they must be
+ * wrong, therefore storing them (and setting PNG_INFO_gAMA)
+ * must be wrong too.
+ */
+ if (file_gamma > (png_fixed_point)PNG_UINT_31_MAX)
+ png_warning(png_ptr, "Gamma too large, ignored");
+
+ else if (file_gamma <= 0)
+ png_warning(png_ptr, "Negative or zero gamma ignored");
+
+ else
+ {
+ info_ptr->gamma = file_gamma;
+ info_ptr->valid |= PNG_INFO_gAMA;
+ }
+}
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
+{
+ png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma,
+ "png_set_gAMA"));
+}
+# endif
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
+void PNGAPI
+png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist)
+{
+ int i;
+
+ png_debug1(1, "in %s storage function", "hIST");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ if (info_ptr->num_palette == 0 || info_ptr->num_palette
+ > PNG_MAX_PALETTE_LENGTH)
+ {
+ png_warning(png_ptr,
+ "Invalid palette size, hIST allocation skipped");
+
+ return;
+ }
+
+ png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
+
+ /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
+ * version 1.2.1
+ */
+ png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
+ PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));
+
+ if (png_ptr->hist == NULL)
+ {
+ png_warning(png_ptr, "Insufficient memory for hIST chunk data");
+ return;
+ }
+
+ for (i = 0; i < info_ptr->num_palette; i++)
+ png_ptr->hist[i] = hist[i];
+
+ info_ptr->hist = png_ptr->hist;
+ info_ptr->valid |= PNG_INFO_hIST;
+ info_ptr->free_me |= PNG_FREE_HIST;
+}
+#endif
+
+void PNGAPI
+png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 width, png_uint_32 height, int bit_depth,
+ int color_type, int interlace_type, int compression_type,
+ int filter_type)
+{
+ png_debug1(1, "in %s storage function", "IHDR");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ info_ptr->width = width;
+ info_ptr->height = height;
+ info_ptr->bit_depth = (png_byte)bit_depth;
+ info_ptr->color_type = (png_byte)color_type;
+ info_ptr->compression_type = (png_byte)compression_type;
+ info_ptr->filter_type = (png_byte)filter_type;
+ info_ptr->interlace_type = (png_byte)interlace_type;
+
+ png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
+ info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
+ info_ptr->compression_type, info_ptr->filter_type);
+
+ if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ info_ptr->channels = 1;
+
+ else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
+ info_ptr->channels = 3;
+
+ else
+ info_ptr->channels = 1;
+
+ if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
+ info_ptr->channels++;
+
+ info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
+
+ /* Check for potential overflow */
+ if (width >
+ (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */
+ - 48 /* bigrowbuf hack */
+ - 1 /* filter byte */
+ - 7*8 /* rounding of width to multiple of 8 pixels */
+ - 8) /* extra max_pixel_depth pad */
+ info_ptr->rowbytes = 0;
+ else
+ info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
+}
+
+#ifdef PNG_oFFs_SUPPORTED
+void PNGAPI
+png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
+ png_int_32 offset_x, png_int_32 offset_y, int unit_type)
+{
+ png_debug1(1, "in %s storage function", "oFFs");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ info_ptr->x_offset = offset_x;
+ info_ptr->y_offset = offset_y;
+ info_ptr->offset_unit_type = (png_byte)unit_type;
+ info_ptr->valid |= PNG_INFO_oFFs;
+}
+#endif
+
+#ifdef PNG_pCAL_SUPPORTED
+void PNGAPI
+png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
+ png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
+ int nparams, png_const_charp units, png_charpp params)
+{
+ png_size_t length;
+ int i;
+
+ png_debug1(1, "in %s storage function", "pCAL");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ length = png_strlen(purpose) + 1;
+ png_debug1(3, "allocating purpose for info (%lu bytes)",
+ (unsigned long)length);
+
+ /* TODO: validate format of calibration name and unit name */
+
+ /* Check that the type matches the specification. */
+ if (type < 0 || type > 3)
+ png_error(png_ptr, "Invalid pCAL equation type");
+
+ /* Validate params[nparams] */
+ for (i=0; i<nparams; ++i)
+ if (!png_check_fp_string(params[i], png_strlen(params[i])))
+ png_error(png_ptr, "Invalid format for pCAL parameter");
+
+ info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
+
+ if (info_ptr->pcal_purpose == NULL)
+ {
+ png_warning(png_ptr, "Insufficient memory for pCAL purpose");
+ return;
+ }
+
+ png_memcpy(info_ptr->pcal_purpose, purpose, length);
+
+ png_debug(3, "storing X0, X1, type, and nparams in info");
+ info_ptr->pcal_X0 = X0;
+ info_ptr->pcal_X1 = X1;
+ info_ptr->pcal_type = (png_byte)type;
+ info_ptr->pcal_nparams = (png_byte)nparams;
+
+ length = png_strlen(units) + 1;
+ png_debug1(3, "allocating units for info (%lu bytes)",
+ (unsigned long)length);
+
+ info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
+
+ if (info_ptr->pcal_units == NULL)
+ {
+ png_warning(png_ptr, "Insufficient memory for pCAL units");
+ return;
+ }
+
+ png_memcpy(info_ptr->pcal_units, units, length);
+
+ info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
+ (png_size_t)((nparams + 1) * png_sizeof(png_charp)));
+
+ if (info_ptr->pcal_params == NULL)
+ {
+ png_warning(png_ptr, "Insufficient memory for pCAL params");
+ return;
+ }
+
+ png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
+
+ for (i = 0; i < nparams; i++)
+ {
+ length = png_strlen(params[i]) + 1;
+ png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
+ (unsigned long)length);
+
+ info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
+
+ if (info_ptr->pcal_params[i] == NULL)
+ {
+ png_warning(png_ptr, "Insufficient memory for pCAL parameter");
+ return;
+ }
+
+ png_memcpy(info_ptr->pcal_params[i], params[i], length);
+ }
+
+ info_ptr->valid |= PNG_INFO_pCAL;
+ info_ptr->free_me |= PNG_FREE_PCAL;
+}
+#endif
+
+#ifdef PNG_sCAL_SUPPORTED
+void PNGAPI
+png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
+ int unit, png_const_charp swidth, png_const_charp sheight)
+{
+ png_size_t lengthw = 0, lengthh = 0;
+
+ png_debug1(1, "in %s storage function", "sCAL");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ /* Double check the unit (should never get here with an invalid
+ * unit unless this is an API call.)
+ */
+ if (unit != 1 && unit != 2)
+ png_error(png_ptr, "Invalid sCAL unit");
+
+ if (swidth == NULL || (lengthw = png_strlen(swidth)) <= 0 ||
+ swidth[0] == 45 /*'-'*/ || !png_check_fp_string(swidth, lengthw))
+ png_error(png_ptr, "Invalid sCAL width");
+
+ if (sheight == NULL || (lengthh = png_strlen(sheight)) <= 0 ||
+ sheight[0] == 45 /*'-'*/ || !png_check_fp_string(sheight, lengthh))
+ png_error(png_ptr, "Invalid sCAL height");
+
+ info_ptr->scal_unit = (png_byte)unit;
+
+ ++lengthw;
+
+ png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw);
+
+ info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw);
+
+ if (info_ptr->scal_s_width == NULL)
+ {
+ png_warning(png_ptr, "Memory allocation failed while processing sCAL");
+ return;
+ }
+
+ png_memcpy(info_ptr->scal_s_width, swidth, lengthw);
+
+ ++lengthh;
+
+ png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh);
+
+ info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh);
+
+ if (info_ptr->scal_s_height == NULL)
+ {
+ png_free (png_ptr, info_ptr->scal_s_width);
+ info_ptr->scal_s_width = NULL;
+
+ png_warning(png_ptr, "Memory allocation failed while processing sCAL");
+ return;
+ }
+
+ png_memcpy(info_ptr->scal_s_height, sheight, lengthh);
+
+ info_ptr->valid |= PNG_INFO_sCAL;
+ info_ptr->free_me |= PNG_FREE_SCAL;
+}
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width,
+ double height)
+{
+ png_debug1(1, "in %s storage function", "sCAL");
+
+ /* Check the arguments. */
+ if (width <= 0)
+ png_warning(png_ptr, "Invalid sCAL width ignored");
+
+ else if (height <= 0)
+ png_warning(png_ptr, "Invalid sCAL height ignored");
+
+ else
+ {
+ /* Convert 'width' and 'height' to ASCII. */
+ char swidth[PNG_sCAL_MAX_DIGITS+1];
+ char sheight[PNG_sCAL_MAX_DIGITS+1];
+
+ png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width,
+ PNG_sCAL_PRECISION);
+ png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height,
+ PNG_sCAL_PRECISION);
+
+ png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
+ }
+}
+# endif
+
+# ifdef PNG_FIXED_POINT_SUPPORTED
+void PNGAPI
+png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit,
+ png_fixed_point width, png_fixed_point height)
+{
+ png_debug1(1, "in %s storage function", "sCAL");
+
+ /* Check the arguments. */
+ if (width <= 0)
+ png_warning(png_ptr, "Invalid sCAL width ignored");
+
+ else if (height <= 0)
+ png_warning(png_ptr, "Invalid sCAL height ignored");
+
+ else
+ {
+ /* Convert 'width' and 'height' to ASCII. */
+ char swidth[PNG_sCAL_MAX_DIGITS+1];
+ char sheight[PNG_sCAL_MAX_DIGITS+1];
+
+ png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width);
+ png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height);
+
+ png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
+ }
+}
+# endif
+#endif
+
+#ifdef PNG_pHYs_SUPPORTED
+void PNGAPI
+png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 res_x, png_uint_32 res_y, int unit_type)
+{
+ png_debug1(1, "in %s storage function", "pHYs");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ info_ptr->x_pixels_per_unit = res_x;
+ info_ptr->y_pixels_per_unit = res_y;
+ info_ptr->phys_unit_type = (png_byte)unit_type;
+ info_ptr->valid |= PNG_INFO_pHYs;
+}
+#endif
+
+void PNGAPI
+png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
+ png_const_colorp palette, int num_palette)
+{
+
+ png_debug1(1, "in %s storage function", "PLTE");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
+ {
+ if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ png_error(png_ptr, "Invalid palette length");
+
+ else
+ {
+ png_warning(png_ptr, "Invalid palette length");
+ return;
+ }
+ }
+
+ /* It may not actually be necessary to set png_ptr->palette here;
+ * we do it for backward compatibility with the way the png_handle_tRNS
+ * function used to do the allocation.
+ */
+ png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
+
+ /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
+ * of num_palette entries, in case of an invalid PNG file that has
+ * too-large sample values.
+ */
+ png_ptr->palette = (png_colorp)png_calloc(png_ptr,
+ PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
+
+ png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
+ info_ptr->palette = png_ptr->palette;
+ info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
+
+ info_ptr->free_me |= PNG_FREE_PLTE;
+
+ info_ptr->valid |= PNG_INFO_PLTE;
+}
+
+#ifdef PNG_sBIT_SUPPORTED
+void PNGAPI
+png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
+ png_const_color_8p sig_bit)
+{
+ png_debug1(1, "in %s storage function", "sBIT");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
+ info_ptr->valid |= PNG_INFO_sBIT;
+}
+#endif
+
+#ifdef PNG_sRGB_SUPPORTED
+void PNGAPI
+png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent)
+{
+ png_debug1(1, "in %s storage function", "sRGB");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ info_ptr->srgb_intent = (png_byte)srgb_intent;
+ info_ptr->valid |= PNG_INFO_sRGB;
+}
+
+void PNGAPI
+png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
+ int srgb_intent)
+{
+ png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ png_set_sRGB(png_ptr, info_ptr, srgb_intent);
+
+# ifdef PNG_gAMA_SUPPORTED
+ png_set_gAMA_fixed(png_ptr, info_ptr, 45455L);
+# endif
+
+# ifdef PNG_cHRM_SUPPORTED
+ png_set_cHRM_fixed(png_ptr, info_ptr,
+ /* color x y */
+ /* white */ 31270L, 32900L,
+ /* red */ 64000L, 33000L,
+ /* green */ 30000L, 60000L,
+ /* blue */ 15000L, 6000L
+ );
+# endif /* cHRM */
+}
+#endif /* sRGB */
+
+
+#ifdef PNG_iCCP_SUPPORTED
+void PNGAPI
+png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
+ png_const_charp name, int compression_type,
+ png_const_bytep profile, png_uint_32 proflen)
+{
+ png_charp new_iccp_name;
+ png_bytep new_iccp_profile;
+ png_uint_32 length;
+
+ png_debug1(1, "in %s storage function", "iCCP");
+
+ if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
+ return;
+
+ length = png_strlen(name)+1;
+ new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
+
+ if (new_iccp_name == NULL)
+ {
+ png_warning(png_ptr, "Insufficient memory to process iCCP chunk");
+ return;
+ }
+
+ png_memcpy(new_iccp_name, name, length);
+ new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen);
+
+ if (new_iccp_profile == NULL)
+ {
+ png_free (png_ptr, new_iccp_name);
+ png_warning(png_ptr,
+ "Insufficient memory to process iCCP profile");
+ return;
+ }
+
+ png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
+
+ png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
+
+ info_ptr->iccp_proflen = proflen;
+ info_ptr->iccp_name = new_iccp_name;
+ info_ptr->iccp_profile = new_iccp_profile;
+ /* Compression is always zero but is here so the API and info structure
+ * does not have to change if we introduce multiple compression types
+ */
+ info_ptr->iccp_compression = (png_byte)compression_type;
+ info_ptr->free_me |= PNG_FREE_ICCP;
+ info_ptr->valid |= PNG_INFO_iCCP;
+}
+#endif
+
+#ifdef PNG_TEXT_SUPPORTED
+void PNGAPI
+png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr,
+ int num_text)
+{
+ int ret;
+ ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
+
+ if (ret)
+ png_error(png_ptr, "Insufficient memory to store text");
+}
+
+int /* PRIVATE */
+png_set_text_2(png_structp png_ptr, png_infop info_ptr,
+ png_const_textp text_ptr, int num_text)
+{
+ int i;
+
+ png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
+ png_ptr->chunk_name[0] == '\0') ?
+ "text" : (png_const_charp)png_ptr->chunk_name));
+
+ if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
+ return(0);
+
+ /* Make sure we have enough space in the "text" array in info_struct
+ * to hold all of the incoming text_ptr objects.
+ */
+ if (info_ptr->num_text + num_text > info_ptr->max_text)
+ {
+ if (info_ptr->text != NULL)
+ {
+ png_textp old_text;
+ int old_max;
+
+ old_max = info_ptr->max_text;
+ info_ptr->max_text = info_ptr->num_text + num_text + 8;
+ old_text = info_ptr->text;
+ info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
+ (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
+
+ if (info_ptr->text == NULL)
+ {
+ png_free(png_ptr, old_text);
+ return(1);
+ }
+
+ png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
+ png_sizeof(png_text)));
+ png_free(png_ptr, old_text);
+ }
+
+ else
+ {
+ info_ptr->max_text = num_text + 8;
+ info_ptr->num_text = 0;
+ info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
+ (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
+ if (info_ptr->text == NULL)
+ return(1);
+ info_ptr->free_me |= PNG_FREE_TEXT;
+ }
+
+ png_debug1(3, "allocated %d entries for info_ptr->text",
+ info_ptr->max_text);
+ }
+ for (i = 0; i < num_text; i++)
+ {
+ png_size_t text_length, key_len;
+ png_size_t lang_len, lang_key_len;
+ png_textp textp = &(info_ptr->text[info_ptr->num_text]);
+
+ if (text_ptr[i].key == NULL)
+ continue;
+
+ if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
+ text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
+ {
+ png_warning(png_ptr, "text compression mode is out of range");
+ continue;
+ }
+
+ key_len = png_strlen(text_ptr[i].key);
+
+ if (text_ptr[i].compression <= 0)
+ {
+ lang_len = 0;
+ lang_key_len = 0;
+ }
+
+ else
+# ifdef PNG_iTXt_SUPPORTED
+ {
+ /* Set iTXt data */
+
+ if (text_ptr[i].lang != NULL)
+ lang_len = png_strlen(text_ptr[i].lang);
+
+ else
+ lang_len = 0;
+
+ if (text_ptr[i].lang_key != NULL)
+ lang_key_len = png_strlen(text_ptr[i].lang_key);
+
+ else
+ lang_key_len = 0;
+ }
+# else /* PNG_iTXt_SUPPORTED */
+ {
+ png_warning(png_ptr, "iTXt chunk not supported");
+ continue;
+ }
+# endif
+
+ if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
+ {
+ text_length = 0;
+# ifdef PNG_iTXt_SUPPORTED
+ if (text_ptr[i].compression > 0)
+ textp->compression = PNG_ITXT_COMPRESSION_NONE;
+
+ else
+# endif
+ textp->compression = PNG_TEXT_COMPRESSION_NONE;
+ }
+
+ else
+ {
+ text_length = png_strlen(text_ptr[i].text);
+ textp->compression = text_ptr[i].compression;
+ }
+
+ textp->key = (png_charp)png_malloc_warn(png_ptr,
+ (png_size_t)
+ (key_len + text_length + lang_len + lang_key_len + 4));
+
+ if (textp->key == NULL)
+ return(1);
+
+ png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
+ (unsigned long)(png_uint_32)
+ (key_len + lang_len + lang_key_len + text_length + 4),
+ textp->key);
+
+ png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
+ *(textp->key + key_len) = '\0';
+
+ if (text_ptr[i].compression > 0)
+ {
+ textp->lang = textp->key + key_len + 1;
+ png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
+ *(textp->lang + lang_len) = '\0';
+ textp->lang_key = textp->lang + lang_len + 1;
+ png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
+ *(textp->lang_key + lang_key_len) = '\0';
+ textp->text = textp->lang_key + lang_key_len + 1;
+ }
+
+ else
+ {
+ textp->lang=NULL;
+ textp->lang_key=NULL;
+ textp->text = textp->key + key_len + 1;
+ }
+
+ if (text_length)
+ png_memcpy(textp->text, text_ptr[i].text,
+ (png_size_t)(text_length));
+
+ *(textp->text + text_length) = '\0';
+
+# ifdef PNG_iTXt_SUPPORTED
+ if (textp->compression > 0)
+ {
+ textp->text_length = 0;
+ textp->itxt_length = text_length;
+ }
+
+ else
+# endif
+ {
+ textp->text_length = text_length;
+ textp->itxt_length = 0;
+ }
+
+ info_ptr->num_text++;
+ png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
+ }
+ return(0);
+}
+#endif
+
+#ifdef PNG_tIME_SUPPORTED
+void PNGAPI
+png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
+{
+ png_debug1(1, "in %s storage function", "tIME");
+
+ if (png_ptr == NULL || info_ptr == NULL ||
+ (png_ptr->mode & PNG_WROTE_tIME))
+ return;
+
+ png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
+ info_ptr->valid |= PNG_INFO_tIME;
+}
+#endif
+
+#ifdef PNG_tRNS_SUPPORTED
+void PNGAPI
+png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
+ png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
+{
+ png_debug1(1, "in %s storage function", "tRNS");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ if (trans_alpha != NULL)
+ {
+ /* It may not actually be necessary to set png_ptr->trans_alpha here;
+ * we do it for backward compatibility with the way the png_handle_tRNS
+ * function used to do the allocation.
+ */
+
+ png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
+
+ /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
+ png_ptr->trans_alpha = info_ptr->trans_alpha =
+ (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH);
+
+ if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
+ png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
+ }
+
+ if (trans_color != NULL)
+ {
+ int sample_max = (1 << info_ptr->bit_depth);
+
+ if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
+ (int)trans_color->gray > sample_max) ||
+ (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
+ ((int)trans_color->red > sample_max ||
+ (int)trans_color->green > sample_max ||
+ (int)trans_color->blue > sample_max)))
+ png_warning(png_ptr,
+ "tRNS chunk has out-of-range samples for bit_depth");
+
+ png_memcpy(&(info_ptr->trans_color), trans_color,
+ png_sizeof(png_color_16));
+
+ if (num_trans == 0)
+ num_trans = 1;
+ }
+
+ info_ptr->num_trans = (png_uint_16)num_trans;
+
+ if (num_trans != 0)
+ {
+ info_ptr->valid |= PNG_INFO_tRNS;
+ info_ptr->free_me |= PNG_FREE_TRNS;
+ }
+}
+#endif
+
+#ifdef PNG_sPLT_SUPPORTED
+void PNGAPI
+png_set_sPLT(png_structp png_ptr,
+ png_infop info_ptr, png_const_sPLT_tp entries, int nentries)
+/*
+ * entries - array of png_sPLT_t structures
+ * to be added to the list of palettes
+ * in the info structure.
+ *
+ * nentries - number of palette structures to be
+ * added.
+ */
+{
+ png_sPLT_tp np;
+ int i;
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ np = (png_sPLT_tp)png_malloc_warn(png_ptr,
+ (info_ptr->splt_palettes_num + nentries) *
+ (png_size_t)png_sizeof(png_sPLT_t));
+
+ if (np == NULL)
+ {
+ png_warning(png_ptr, "No memory for sPLT palettes");
+ return;
+ }
+
+ png_memcpy(np, info_ptr->splt_palettes,
+ info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
+
+ png_free(png_ptr, info_ptr->splt_palettes);
+ info_ptr->splt_palettes=NULL;
+
+ for (i = 0; i < nentries; i++)
+ {
+ png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
+ png_const_sPLT_tp from = entries + i;
+ png_uint_32 length;
+
+ length = png_strlen(from->name) + 1;
+ to->name = (png_charp)png_malloc_warn(png_ptr, (png_size_t)length);
+
+ if (to->name == NULL)
+ {
+ png_warning(png_ptr,
+ "Out of memory while processing sPLT chunk");
+ continue;
+ }
+
+ png_memcpy(to->name, from->name, length);
+ to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
+ (png_size_t)(from->nentries * png_sizeof(png_sPLT_entry)));
+
+ if (to->entries == NULL)
+ {
+ png_warning(png_ptr,
+ "Out of memory while processing sPLT chunk");
+ png_free(png_ptr, to->name);
+ to->name = NULL;
+ continue;
+ }
+
+ png_memcpy(to->entries, from->entries,
+ from->nentries * png_sizeof(png_sPLT_entry));
+
+ to->nentries = from->nentries;
+ to->depth = from->depth;
+ }
+
+ info_ptr->splt_palettes = np;
+ info_ptr->splt_palettes_num += nentries;
+ info_ptr->valid |= PNG_INFO_sPLT;
+ info_ptr->free_me |= PNG_FREE_SPLT;
+}
+#endif /* PNG_sPLT_SUPPORTED */
+
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+void PNGAPI
+png_set_unknown_chunks(png_structp png_ptr,
+ png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
+{
+ png_unknown_chunkp np;
+ int i;
+
+ if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
+ return;
+
+ np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
+ (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
+ png_sizeof(png_unknown_chunk));
+
+ if (np == NULL)
+ {
+ png_warning(png_ptr,
+ "Out of memory while processing unknown chunk");
+ return;
+ }
+
+ png_memcpy(np, info_ptr->unknown_chunks,
+ (png_size_t)info_ptr->unknown_chunks_num *
+ png_sizeof(png_unknown_chunk));
+
+ png_free(png_ptr, info_ptr->unknown_chunks);
+ info_ptr->unknown_chunks = NULL;
+
+ for (i = 0; i < num_unknowns; i++)
+ {
+ png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
+ png_const_unknown_chunkp from = unknowns + i;
+
+ png_memcpy(to->name, from->name, png_sizeof(from->name));
+ to->name[png_sizeof(to->name)-1] = '\0';
+ to->size = from->size;
+
+ /* Note our location in the read or write sequence */
+ to->location = (png_byte)(png_ptr->mode & 0xff);
+
+ if (from->size == 0)
+ to->data=NULL;
+
+ else
+ {
+ to->data = (png_bytep)png_malloc_warn(png_ptr,
+ (png_size_t)from->size);
+
+ if (to->data == NULL)
+ {
+ png_warning(png_ptr,
+ "Out of memory while processing unknown chunk");
+ to->size = 0;
+ }
+
+ else
+ png_memcpy(to->data, from->data, from->size);
+ }
+ }
+
+ info_ptr->unknown_chunks = np;
+ info_ptr->unknown_chunks_num += num_unknowns;
+ info_ptr->free_me |= PNG_FREE_UNKN;
+}
+
+void PNGAPI
+png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
+ int chunk, int location)
+{
+ if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
+ info_ptr->unknown_chunks_num)
+ info_ptr->unknown_chunks[chunk].location = (png_byte)location;
+}
+#endif
+
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+png_uint_32 PNGAPI
+png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
+{
+ png_debug(1, "in png_permit_mng_features");
+
+ if (png_ptr == NULL)
+ return (png_uint_32)0;
+
+ png_ptr->mng_features_permitted =
+ (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
+
+ return (png_uint_32)png_ptr->mng_features_permitted;
+}
+#endif
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+void PNGAPI
+png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep
+ chunk_list, int num_chunks)
+{
+ png_bytep new_list, p;
+ int i, old_num_chunks;
+ if (png_ptr == NULL)
+ return;
+
+ if (num_chunks == 0)
+ {
+ if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
+ png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
+
+ else
+ png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
+
+ if (keep == PNG_HANDLE_CHUNK_ALWAYS)
+ png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
+
+ else
+ png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
+
+ return;
+ }
+
+ if (chunk_list == NULL)
+ return;
+
+ old_num_chunks = png_ptr->num_chunk_list;
+ new_list=(png_bytep)png_malloc(png_ptr,
+ (png_size_t)(5*(num_chunks + old_num_chunks)));
+
+ if (png_ptr->chunk_list != NULL)
+ {
+ png_memcpy(new_list, png_ptr->chunk_list,
+ (png_size_t)(5*old_num_chunks));
+ png_free(png_ptr, png_ptr->chunk_list);
+ png_ptr->chunk_list=NULL;
+ }
+
+ png_memcpy(new_list + 5*old_num_chunks, chunk_list,
+ (png_size_t)(5*num_chunks));
+
+ for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
+ *p=(png_byte)keep;
+
+ png_ptr->num_chunk_list = old_num_chunks + num_chunks;
+ png_ptr->chunk_list = new_list;
+ png_ptr->free_me |= PNG_FREE_LIST;
+}
+#endif
+
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
+void PNGAPI
+png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
+ png_user_chunk_ptr read_user_chunk_fn)
+{
+ png_debug(1, "in png_set_read_user_chunk_fn");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->read_user_chunk_fn = read_user_chunk_fn;
+ png_ptr->user_chunk_ptr = user_chunk_ptr;
+}
+#endif
+
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+void PNGAPI
+png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
+{
+ png_debug1(1, "in %s storage function", "rows");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
+ png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
+
+ info_ptr->row_pointers = row_pointers;
+
+ if (row_pointers)
+ info_ptr->valid |= PNG_INFO_IDAT;
+}
+#endif
+
+void PNGAPI
+png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_free(png_ptr, png_ptr->zbuf);
+
+ if (size > ZLIB_IO_MAX)
+ {
+ png_warning(png_ptr, "Attempt to set buffer size beyond max ignored");
+ png_ptr->zbuf_size = ZLIB_IO_MAX;
+ size = ZLIB_IO_MAX; /* must fit */
+ }
+
+ else
+ png_ptr->zbuf_size = (uInt)size;
+
+ png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
+
+ /* The following ensures a relatively safe failure if this gets called while
+ * the buffer is actually in use.
+ */
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = 0;
+ png_ptr->zstream.avail_in = 0;
+}
+
+void PNGAPI
+png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
+{
+ if (png_ptr && info_ptr)
+ info_ptr->valid &= ~mask;
+}
+
+
+
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+/* This function was added to libpng 1.2.6 */
+void PNGAPI
+png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
+ png_uint_32 user_height_max)
+{
+ /* Images with dimensions larger than these limits will be
+ * rejected by png_set_IHDR(). To accept any PNG datastream
+ * regardless of dimensions, set both limits to 0x7ffffffL.
+ */
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->user_width_max = user_width_max;
+ png_ptr->user_height_max = user_height_max;
+}
+
+/* This function was added to libpng 1.4.0 */
+void PNGAPI
+png_set_chunk_cache_max (png_structp png_ptr,
+ png_uint_32 user_chunk_cache_max)
+{
+ if (png_ptr)
+ png_ptr->user_chunk_cache_max = user_chunk_cache_max;
+}
+
+/* This function was added to libpng 1.4.1 */
+void PNGAPI
+png_set_chunk_malloc_max (png_structp png_ptr,
+ png_alloc_size_t user_chunk_malloc_max)
+{
+ if (png_ptr)
+ png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
+}
+#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
+
+
+#ifdef PNG_BENIGN_ERRORS_SUPPORTED
+void PNGAPI
+png_set_benign_errors(png_structp png_ptr, int allowed)
+{
+ png_debug(1, "in png_set_benign_errors");
+
+ if (allowed)
+ png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
+
+ else
+ png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
+}
+#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
--- /dev/null
+
+/* pngstruct.h - header file for PNG reference library
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+/* The structure that holds the information to read and write PNG files.
+ * The only people who need to care about what is inside of this are the
+ * people who will be modifying the library for their own special needs.
+ * It should NOT be accessed directly by an application.
+ */
+
+#ifndef PNGSTRUCT_H
+#define PNGSTRUCT_H
+/* zlib.h defines the structure z_stream, an instance of which is included
+ * in this structure and is required for decompressing the LZ compressed
+ * data in PNG files.
+ */
+#include "zlib.h"
+
+struct png_struct_def
+{
+#ifdef PNG_SETJMP_SUPPORTED
+ jmp_buf png_jmpbuf; /* used in png_error */
+ png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */
+#endif
+ png_error_ptr error_fn; /* function for printing errors and aborting */
+ png_error_ptr warning_fn; /* function for printing warnings */
+ png_voidp error_ptr; /* user supplied struct for error functions */
+ png_rw_ptr write_data_fn; /* function for writing output data */
+ png_rw_ptr read_data_fn; /* function for reading input data */
+ png_voidp io_ptr; /* ptr to application struct for I/O functions */
+
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+ png_user_transform_ptr read_user_transform_fn; /* user read transform */
+#endif
+
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+ png_user_transform_ptr write_user_transform_fn; /* user write transform */
+#endif
+
+/* These were added in libpng-1.0.2 */
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
+#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
+ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+ png_voidp user_transform_ptr; /* user supplied struct for user transform */
+ png_byte user_transform_depth; /* bit depth of user transformed pixels */
+ png_byte user_transform_channels; /* channels in user transformed pixels */
+#endif
+#endif
+
+ png_uint_32 mode; /* tells us where we are in the PNG file */
+ png_uint_32 flags; /* flags indicating various things to libpng */
+ png_uint_32 transformations; /* which transformations to perform */
+
+ z_stream zstream; /* pointer to decompression structure (below) */
+ png_bytep zbuf; /* buffer for zlib */
+ uInt zbuf_size; /* size of zbuf (typically 65536) */
+ int zlib_level; /* holds zlib compression level */
+ int zlib_method; /* holds zlib compression method */
+ int zlib_window_bits; /* holds zlib compression window bits */
+ int zlib_mem_level; /* holds zlib compression memory level */
+ int zlib_strategy; /* holds zlib compression strategy */
+
+ png_uint_32 width; /* width of image in pixels */
+ png_uint_32 height; /* height of image in pixels */
+ png_uint_32 num_rows; /* number of rows in current pass */
+ png_uint_32 usr_width; /* width of row at start of write */
+ png_size_t rowbytes; /* size of row in bytes */
+ png_uint_32 iwidth; /* width of current interlaced row in pixels */
+ png_uint_32 row_number; /* current row in interlace pass */
+ png_bytep prev_row; /* buffer to save previous (unfiltered) row */
+ png_bytep row_buf; /* buffer to save current (unfiltered) row */
+ png_bytep sub_row; /* buffer to save "sub" row when filtering */
+ png_bytep up_row; /* buffer to save "up" row when filtering */
+ png_bytep avg_row; /* buffer to save "avg" row when filtering */
+ png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
+ png_row_info row_info; /* used for transformation routines */
+
+ png_uint_32 idat_size; /* current IDAT size for read */
+ png_uint_32 crc; /* current chunk CRC value */
+ png_colorp palette; /* palette from the input file */
+ png_uint_16 num_palette; /* number of color entries in palette */
+ png_uint_16 num_trans; /* number of transparency values */
+ png_byte chunk_name[5]; /* null-terminated name of current chunk */
+ png_byte compression; /* file compression type (always 0) */
+ png_byte filter; /* file filter type (always 0) */
+ png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
+ png_byte pass; /* current interlace pass (0 - 6) */
+ png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */
+ png_byte color_type; /* color type of file */
+ png_byte bit_depth; /* bit depth of file */
+ png_byte usr_bit_depth; /* bit depth of users row */
+ png_byte pixel_depth; /* number of bits per pixel */
+ png_byte channels; /* number of channels in file */
+ png_byte usr_channels; /* channels at start of write */
+ png_byte sig_bytes; /* magic bytes read/written from start of file */
+
+#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
+ png_uint_16 filler; /* filler bytes for pixel expansion */
+#endif
+
+#ifdef PNG_bKGD_SUPPORTED
+ png_byte background_gamma_type;
+ png_fixed_point background_gamma;
+ png_color_16 background; /* background color in screen gamma space */
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ png_color_16 background_1; /* background normalized to gamma 1.0 */
+#endif
+#endif /* PNG_bKGD_SUPPORTED */
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+ png_flush_ptr output_flush_fn; /* Function for flushing output */
+ png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */
+ png_uint_32 flush_rows; /* number of rows written since last flush */
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */
+ png_fixed_point gamma; /* file gamma value */
+ png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ png_bytep gamma_table; /* gamma table for 8-bit depth files */
+ png_bytep gamma_from_1; /* converts from 1.0 to screen */
+ png_bytep gamma_to_1; /* converts from file to 1.0 */
+ png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
+ png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */
+ png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
+ png_color_8 sig_bit; /* significant bits in each available channel */
+#endif
+
+#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
+ png_color_8 shift; /* shift for significant bit tranformation */
+#endif
+
+#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
+ || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ png_bytep trans_alpha; /* alpha values for paletted files */
+ png_color_16 trans_color; /* transparent color for non-paletted files */
+#endif
+
+ png_read_status_ptr read_row_fn; /* called after each row is decoded */
+ png_write_status_ptr write_row_fn; /* called after each row is encoded */
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+ png_progressive_info_ptr info_fn; /* called after header data fully read */
+ png_progressive_row_ptr row_fn; /* called after a prog. row is decoded */
+ png_progressive_end_ptr end_fn; /* called after image is complete */
+ png_bytep save_buffer_ptr; /* current location in save_buffer */
+ png_bytep save_buffer; /* buffer for previously read data */
+ png_bytep current_buffer_ptr; /* current location in current_buffer */
+ png_bytep current_buffer; /* buffer for recently used data */
+ png_uint_32 push_length; /* size of current input chunk */
+ png_uint_32 skip_length; /* bytes to skip in input data */
+ png_size_t save_buffer_size; /* amount of data now in save_buffer */
+ png_size_t save_buffer_max; /* total size of save_buffer */
+ png_size_t buffer_size; /* total amount of available input data */
+ png_size_t current_buffer_size; /* amount of data now in current_buffer */
+ int process_mode; /* what push library is currently doing */
+ int cur_palette; /* current push library palette index */
+
+# ifdef PNG_TEXT_SUPPORTED
+ png_size_t current_text_size; /* current size of text input data */
+ png_size_t current_text_left; /* how much text left to read in input */
+ png_charp current_text; /* current text chunk buffer */
+ png_charp current_text_ptr; /* current location in current_text */
+# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */
+
+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+
+#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
+/* For the Borland special 64K segment handler */
+ png_bytepp offset_table_ptr;
+ png_bytep offset_table;
+ png_uint_16 offset_table_number;
+ png_uint_16 offset_table_count;
+ png_uint_16 offset_table_count_free;
+#endif
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+ png_bytep palette_lookup; /* lookup table for quantizing */
+ png_bytep quantize_index; /* index translation for palette files */
+#endif
+
+#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED)
+ png_uint_16p hist; /* histogram */
+#endif
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ png_byte heuristic_method; /* heuristic for row filter selection */
+ png_byte num_prev_filters; /* number of weights for previous rows */
+ png_bytep prev_filters; /* filter type(s) of previous row(s) */
+ png_uint_16p filter_weights; /* weight(s) for previous line(s) */
+ png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
+ png_uint_16p filter_costs; /* relative filter calculation cost */
+ png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
+#endif
+
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+ png_charp time_buffer; /* String to hold RFC 1123 time text */
+#endif
+
+/* New members added in libpng-1.0.6 */
+
+ png_uint_32 free_me; /* flags items libpng is responsible for freeing */
+
+#ifdef PNG_USER_CHUNKS_SUPPORTED
+ png_voidp user_chunk_ptr;
+ png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
+#endif
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ int num_chunk_list;
+ png_bytep chunk_list;
+#endif
+
+/* New members added in libpng-1.0.3 */
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+ png_byte rgb_to_gray_status;
+ /* These were changed from png_byte in libpng-1.0.6 */
+ png_uint_16 rgb_to_gray_red_coeff;
+ png_uint_16 rgb_to_gray_green_coeff;
+ png_uint_16 rgb_to_gray_blue_coeff;
+#endif
+
+/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
+#if defined(PNG_MNG_FEATURES_SUPPORTED) || \
+ defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
+ defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
+/* Changed from png_byte to png_uint_32 at version 1.2.0 */
+ png_uint_32 mng_features_permitted;
+#endif
+
+/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ png_byte filter_type;
+#endif
+
+/* New members added in libpng-1.2.0 */
+
+/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_voidp mem_ptr; /* user supplied struct for mem functions */
+ png_malloc_ptr malloc_fn; /* function for allocating memory */
+ png_free_ptr free_fn; /* function for freeing memory */
+#endif
+
+/* New member added in libpng-1.0.13 and 1.2.0 */
+ png_bytep big_row_buf; /* buffer to save current (unfiltered) row */
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+/* The following three members were added at version 1.0.14 and 1.2.4 */
+ png_bytep quantize_sort; /* working sort array */
+ png_bytep index_to_palette; /* where the original index currently is
+ in the palette */
+ png_bytep palette_to_index; /* which original index points to this
+ palette color */
+#endif
+
+/* New members added in libpng-1.0.16 and 1.2.6 */
+ png_byte compression_type;
+
+#ifdef PNG_USER_LIMITS_SUPPORTED
+ png_uint_32 user_width_max;
+ png_uint_32 user_height_max;
+
+ /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown
+ * chunks that can be stored (0 means unlimited).
+ */
+ png_uint_32 user_chunk_cache_max;
+
+ /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk
+ * can occupy when decompressed. 0 means unlimited.
+ */
+ png_alloc_size_t user_chunk_malloc_max;
+#endif
+
+/* New member added in libpng-1.0.25 and 1.2.17 */
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+ /* Storage for unknown chunk that the library doesn't recognize. */
+ png_unknown_chunk unknown_chunk;
+#endif
+
+/* New members added in libpng-1.2.26 */
+ png_size_t old_big_row_buf_size;
+ png_size_t old_prev_row_size;
+
+/* New member added in libpng-1.2.30 */
+ png_charp chunkdata; /* buffer for reading chunk data */
+
+#ifdef PNG_IO_STATE_SUPPORTED
+/* New member added in libpng-1.4.0 */
+ png_uint_32 io_state;
+#endif
+};
+#endif /* PNGSTRUCT_H */
--- /dev/null
+
+/* pngtrans.c - transforms the data in a row (used by both readers and writers)
+ *
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+#include "pngpriv.h"
+
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
+#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
+/* Turn on BGR-to-RGB mapping */
+void PNGAPI
+png_set_bgr(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_bgr");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_BGR;
+}
+#endif
+
+#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
+/* Turn on 16 bit byte swapping */
+void PNGAPI
+png_set_swap(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_swap");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (png_ptr->bit_depth == 16)
+ png_ptr->transformations |= PNG_SWAP_BYTES;
+}
+#endif
+
+#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
+/* Turn on pixel packing */
+void PNGAPI
+png_set_packing(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_packing");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (png_ptr->bit_depth < 8)
+ {
+ png_ptr->transformations |= PNG_PACK;
+ png_ptr->usr_bit_depth = 8;
+ }
+}
+#endif
+
+#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
+/* Turn on packed pixel swapping */
+void PNGAPI
+png_set_packswap(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_packswap");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (png_ptr->bit_depth < 8)
+ png_ptr->transformations |= PNG_PACKSWAP;
+}
+#endif
+
+#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
+void PNGAPI
+png_set_shift(png_structp png_ptr, png_const_color_8p true_bits)
+{
+ png_debug(1, "in png_set_shift");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_SHIFT;
+ png_ptr->shift = *true_bits;
+}
+#endif
+
+#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
+ defined(PNG_WRITE_INTERLACING_SUPPORTED)
+int PNGAPI
+png_set_interlace_handling(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_interlace handling");
+
+ if (png_ptr && png_ptr->interlaced)
+ {
+ png_ptr->transformations |= PNG_INTERLACE;
+ return (7);
+ }
+
+ return (1);
+}
+#endif
+
+#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
+/* Add a filler byte on read, or remove a filler or alpha byte on write.
+ * The filler type has changed in v0.95 to allow future 2-byte fillers
+ * for 48-bit input data, as well as to avoid problems with some compilers
+ * that don't like bytes as parameters.
+ */
+void PNGAPI
+png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
+{
+ png_debug(1, "in png_set_filler");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_FILLER;
+ png_ptr->filler = (png_uint_16)filler;
+
+ if (filler_loc == PNG_FILLER_AFTER)
+ png_ptr->flags |= PNG_FLAG_FILLER_AFTER;
+
+ else
+ png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER;
+
+ /* This should probably go in the "do_read_filler" routine.
+ * I attempted to do that in libpng-1.0.1a but that caused problems
+ * so I restored it in libpng-1.0.2a
+ */
+
+ if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
+ {
+ png_ptr->usr_channels = 4;
+ }
+
+ /* Also I added this in libpng-1.0.2a (what happens when we expand
+ * a less-than-8-bit grayscale to GA?) */
+
+ if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8)
+ {
+ png_ptr->usr_channels = 2;
+ }
+}
+
+/* Added to libpng-1.2.7 */
+void PNGAPI
+png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
+{
+ png_debug(1, "in png_set_add_alpha");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_set_filler(png_ptr, filler, filler_loc);
+ png_ptr->transformations |= PNG_ADD_ALPHA;
+}
+
+#endif
+
+#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
+ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
+void PNGAPI
+png_set_swap_alpha(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_swap_alpha");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_SWAP_ALPHA;
+}
+#endif
+
+#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
+ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
+void PNGAPI
+png_set_invert_alpha(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_invert_alpha");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_INVERT_ALPHA;
+}
+#endif
+
+#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
+void PNGAPI
+png_set_invert_mono(png_structp png_ptr)
+{
+ png_debug(1, "in png_set_invert_mono");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_INVERT_MONO;
+}
+
+/* Invert monochrome grayscale data */
+void /* PRIVATE */
+png_do_invert(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_invert");
+
+ /* This test removed from libpng version 1.0.13 and 1.2.0:
+ * if (row_info->bit_depth == 1 &&
+ */
+ if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
+ {
+ png_bytep rp = row;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+
+ for (i = 0; i < istop; i++)
+ {
+ *rp = (png_byte)(~(*rp));
+ rp++;
+ }
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
+ row_info->bit_depth == 8)
+ {
+ png_bytep rp = row;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+
+ for (i = 0; i < istop; i += 2)
+ {
+ *rp = (png_byte)(~(*rp));
+ rp += 2;
+ }
+ }
+
+#ifdef PNG_16BIT_SUPPORTED
+ else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
+ row_info->bit_depth == 16)
+ {
+ png_bytep rp = row;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+
+ for (i = 0; i < istop; i += 4)
+ {
+ *rp = (png_byte)(~(*rp));
+ *(rp + 1) = (png_byte)(~(*(rp + 1)));
+ rp += 4;
+ }
+ }
+#endif
+}
+#endif
+
+#ifdef PNG_16BIT_SUPPORTED
+#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
+/* Swaps byte order on 16 bit depth images */
+void /* PRIVATE */
+png_do_swap(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_swap");
+
+ if (row_info->bit_depth == 16)
+ {
+ png_bytep rp = row;
+ png_uint_32 i;
+ png_uint_32 istop= row_info->width * row_info->channels;
+
+ for (i = 0; i < istop; i++, rp += 2)
+ {
+ png_byte t = *rp;
+ *rp = *(rp + 1);
+ *(rp + 1) = t;
+ }
+ }
+}
+#endif
+#endif
+
+#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
+static PNG_CONST png_byte onebppswaptable[256] = {
+ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
+ 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
+ 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
+ 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
+ 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
+ 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
+ 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
+ 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
+ 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
+ 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
+ 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
+ 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
+ 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
+ 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
+ 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
+ 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
+ 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
+ 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
+ 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
+ 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
+ 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
+ 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
+ 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
+ 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
+ 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
+ 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
+ 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
+ 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
+ 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
+ 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
+ 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
+ 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
+};
+
+static PNG_CONST png_byte twobppswaptable[256] = {
+ 0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,
+ 0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,
+ 0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,
+ 0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4,
+ 0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8,
+ 0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8,
+ 0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC,
+ 0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC,
+ 0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1,
+ 0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1,
+ 0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5,
+ 0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5,
+ 0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9,
+ 0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9,
+ 0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD,
+ 0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD,
+ 0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2,
+ 0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2,
+ 0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6,
+ 0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6,
+ 0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA,
+ 0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA,
+ 0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE,
+ 0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE,
+ 0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3,
+ 0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3,
+ 0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7,
+ 0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7,
+ 0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB,
+ 0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB,
+ 0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF,
+ 0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
+};
+
+static PNG_CONST png_byte fourbppswaptable[256] = {
+ 0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
+ 0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,
+ 0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,
+ 0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1,
+ 0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,
+ 0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2,
+ 0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73,
+ 0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3,
+ 0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74,
+ 0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4,
+ 0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75,
+ 0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5,
+ 0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76,
+ 0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6,
+ 0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77,
+ 0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7,
+ 0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78,
+ 0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8,
+ 0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79,
+ 0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9,
+ 0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A,
+ 0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA,
+ 0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B,
+ 0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB,
+ 0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C,
+ 0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC,
+ 0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D,
+ 0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD,
+ 0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E,
+ 0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE,
+ 0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F,
+ 0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF
+};
+
+/* Swaps pixel packing order within bytes */
+void /* PRIVATE */
+png_do_packswap(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_packswap");
+
+ if (row_info->bit_depth < 8)
+ {
+ png_bytep rp;
+ png_const_bytep end, table;
+
+ end = row + row_info->rowbytes;
+
+ if (row_info->bit_depth == 1)
+ table = onebppswaptable;
+
+ else if (row_info->bit_depth == 2)
+ table = twobppswaptable;
+
+ else if (row_info->bit_depth == 4)
+ table = fourbppswaptable;
+
+ else
+ return;
+
+ for (rp = row; rp < end; rp++)
+ *rp = table[*rp];
+ }
+}
+#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */
+
+#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
+ defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
+/* Remove a channel - this used to be 'png_do_strip_filler' but it used a
+ * somewhat weird combination of flags to determine what to do. All the calls
+ * to png_do_strip_filler are changed in 1.5.2 to call this instead with the
+ * correct arguments.
+ *
+ * The routine isn't general - the channel must be the channel at the start or
+ * end (not in the middle) of each pixel.
+ */
+void /* PRIVATE */
+png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
+{
+ png_bytep sp = row; /* source pointer */
+ png_bytep dp = row; /* destination pointer */
+ png_bytep ep = row + row_info->rowbytes; /* One beyond end of row */
+
+ /* At the start sp will point to the first byte to copy and dp to where
+ * it is copied to. ep always points just beyond the end of the row, so
+ * the loop simply copies (channels-1) channels until sp reaches ep.
+ */
+ /* GA, GX, XG cases */
+ if (row_info->channels == 2)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ if (at_start) /* Skip initial filler */
+ ++sp;
+ else /* Skip initial channels and, for sp, the filler */
+ sp += 2, ++dp;
+
+ /* For a 1 pixel wide image there is nothing to do */
+ while (sp < ep)
+ *dp++ = *sp, sp += 2;
+
+ row_info->pixel_depth = 8;
+ }
+
+ else if (row_info->bit_depth == 16)
+ {
+ if (at_start)
+ sp += 2;
+ else
+ sp += 4, dp += 2;
+
+ while (sp < ep)
+ *dp++ = *sp++, *dp++ = *sp, sp += 3;
+
+ row_info->pixel_depth = 16;
+ }
+
+ else
+ return; /* bad bit depth */
+
+ row_info->channels = 1;
+
+ /* Finally fix the color type if it records an alpha channel */
+ if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ row_info->color_type = PNG_COLOR_TYPE_GRAY;
+ }
+
+ /* RGBA, RGBX, XRGB cases */
+ else if (row_info->channels == 4)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ if (at_start) /* Skip initial filler */
+ ++sp;
+ else /* Skip initial channels and, for sp, the filler */
+ sp += 4, dp += 3;
+
+ /* Note that the loop adds 3 to dp and 4 to sp each time. */
+ while (sp < ep)
+ *dp++ = *sp++, *dp++ = *sp++, *dp++ = *sp, sp += 2;
+
+ row_info->pixel_depth = 24;
+ }
+
+ else if (row_info->bit_depth == 16)
+ {
+ if (at_start)
+ sp += 2;
+ else
+ sp += 8, dp += 6;
+
+ while (sp < ep)
+ {
+ /* Copy 6 bytes, skip 2 */
+ *dp++ = *sp++, *dp++ = *sp++;
+ *dp++ = *sp++, *dp++ = *sp++;
+ *dp++ = *sp++, *dp++ = *sp, sp += 3;
+ }
+
+ row_info->pixel_depth = 48;
+ }
+
+ else
+ return; /* bad bit depth */
+
+ row_info->channels = 3;
+
+ /* Finally fix the color type if it records an alpha channel */
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ row_info->color_type = PNG_COLOR_TYPE_RGB;
+ }
+
+ else
+ return; /* The filler channel has gone already */
+
+ /* Fix the rowbytes value. */
+ row_info->rowbytes = dp-row;
+}
+#endif
+
+#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
+/* Swaps red and blue bytes within a pixel */
+void /* PRIVATE */
+png_do_bgr(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_bgr");
+
+ if ((row_info->color_type & PNG_COLOR_MASK_COLOR))
+ {
+ png_uint_32 row_width = row_info->width;
+ if (row_info->bit_depth == 8)
+ {
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ {
+ png_bytep rp;
+ png_uint_32 i;
+
+ for (i = 0, rp = row; i < row_width; i++, rp += 3)
+ {
+ png_byte save = *rp;
+ *rp = *(rp + 2);
+ *(rp + 2) = save;
+ }
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ {
+ png_bytep rp;
+ png_uint_32 i;
+
+ for (i = 0, rp = row; i < row_width; i++, rp += 4)
+ {
+ png_byte save = *rp;
+ *rp = *(rp + 2);
+ *(rp + 2) = save;
+ }
+ }
+ }
+
+#ifdef PNG_16BIT_SUPPORTED
+ else if (row_info->bit_depth == 16)
+ {
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ {
+ png_bytep rp;
+ png_uint_32 i;
+
+ for (i = 0, rp = row; i < row_width; i++, rp += 6)
+ {
+ png_byte save = *rp;
+ *rp = *(rp + 4);
+ *(rp + 4) = save;
+ save = *(rp + 1);
+ *(rp + 1) = *(rp + 5);
+ *(rp + 5) = save;
+ }
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ {
+ png_bytep rp;
+ png_uint_32 i;
+
+ for (i = 0, rp = row; i < row_width; i++, rp += 8)
+ {
+ png_byte save = *rp;
+ *rp = *(rp + 4);
+ *(rp + 4) = save;
+ save = *(rp + 1);
+ *(rp + 1) = *(rp + 5);
+ *(rp + 5) = save;
+ }
+ }
+ }
+#endif
+ }
+}
+#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
+
+#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
+ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
+void PNGAPI
+png_set_user_transform_info(png_structp png_ptr, png_voidp
+ user_transform_ptr, int user_transform_depth, int user_transform_channels)
+{
+ png_debug(1, "in png_set_user_transform_info");
+
+ if (png_ptr == NULL)
+ return;
+ png_ptr->user_transform_ptr = user_transform_ptr;
+ png_ptr->user_transform_depth = (png_byte)user_transform_depth;
+ png_ptr->user_transform_channels = (png_byte)user_transform_channels;
+}
+#endif
+
+/* This function returns a pointer to the user_transform_ptr associated with
+ * the user transform functions. The application should free any memory
+ * associated with this pointer before png_write_destroy and png_read_destroy
+ * are called.
+ */
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
+png_voidp PNGAPI
+png_get_user_transform_ptr(png_const_structp png_ptr)
+{
+ if (png_ptr == NULL)
+ return (NULL);
+
+ return ((png_voidp)png_ptr->user_transform_ptr);
+}
+#endif
+
+#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
+png_uint_32 PNGAPI
+png_get_current_row_number(png_const_structp png_ptr)
+{
+ /* See the comments in png.h - this is the sub-image row when reading and
+ * interlaced image.
+ */
+ if (png_ptr != NULL)
+ return png_ptr->row_number;
+
+ return PNG_UINT_32_MAX; /* help the app not to fail silently */
+}
+
+png_byte PNGAPI
+png_get_current_pass_number(png_const_structp png_ptr)
+{
+ if (png_ptr != NULL)
+ return png_ptr->pass;
+ return 8; /* invalid */
+}
+#endif /* PNG_USER_TRANSFORM_INFO_SUPPORTED */
+#endif /* PNG_READ_USER_TRANSFORM_SUPPORTED ||
+ PNG_WRITE_USER_TRANSFORM_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
--- /dev/null
+
+/* pngwio.c - functions for data output
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
+ * This file provides a location for all output. Users who need
+ * special handling are expected to write functions that have the same
+ * arguments as these and perform similar functions, but that possibly
+ * use different output methods. Note that you shouldn't change these
+ * functions, but rather write replacement functions and then change
+ * them at run time with png_set_write_fn(...).
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_WRITE_SUPPORTED
+
+/* Write the data to whatever output you are using. The default routine
+ * writes to a file pointer. Note that this routine sometimes gets called
+ * with very small lengths, so you should implement some kind of simple
+ * buffering if you are using unbuffered writes. This should never be asked
+ * to write more than 64K on a 16 bit machine.
+ */
+
+void /* PRIVATE */
+png_write_data(png_structp png_ptr, png_const_bytep data, png_size_t length)
+{
+ /* NOTE: write_data_fn must not change the buffer! */
+ if (png_ptr->write_data_fn != NULL )
+ (*(png_ptr->write_data_fn))(png_ptr, (png_bytep)data, length);
+
+ else
+ png_error(png_ptr, "Call to NULL write function");
+}
+
+#ifdef PNG_STDIO_SUPPORTED
+/* This is the function that does the actual writing of data. If you are
+ * not writing to a standard C stream, you should create a replacement
+ * write_data function and use it at run time with png_set_write_fn(), rather
+ * than changing the library.
+ */
+#ifndef USE_FAR_KEYWORD
+void PNGCBAPI
+png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+ png_size_t check;
+
+ if (png_ptr == NULL)
+ return;
+
+ check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
+
+ if (check != length)
+ png_error(png_ptr, "Write Error");
+}
+#else
+/* This is the model-independent version. Since the standard I/O library
+ * can't handle far buffers in the medium and small models, we have to copy
+ * the data.
+ */
+
+#define NEAR_BUF_SIZE 1024
+#define MIN(a,b) (a <= b ? a : b)
+
+void PNGCBAPI
+png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+ png_uint_32 check;
+ png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
+ png_FILE_p io_ptr;
+
+ if (png_ptr == NULL)
+ return;
+
+ /* Check if data really is near. If so, use usual code. */
+ near_data = (png_byte *)CVT_PTR_NOCHECK(data);
+ io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
+
+ if ((png_bytep)near_data == data)
+ {
+ check = fwrite(near_data, 1, length, io_ptr);
+ }
+
+ else
+ {
+ png_byte buf[NEAR_BUF_SIZE];
+ png_size_t written, remaining, err;
+ check = 0;
+ remaining = length;
+
+ do
+ {
+ written = MIN(NEAR_BUF_SIZE, remaining);
+ png_memcpy(buf, data, written); /* Copy far buffer to near buffer */
+ err = fwrite(buf, 1, written, io_ptr);
+
+ if (err != written)
+ break;
+
+ else
+ check += err;
+
+ data += written;
+ remaining -= written;
+ }
+ while (remaining != 0);
+ }
+
+ if (check != length)
+ png_error(png_ptr, "Write Error");
+}
+
+#endif
+#endif
+
+/* This function is called to output any data pending writing (normally
+ * to disk). After png_flush is called, there should be no data pending
+ * writing in any buffers.
+ */
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+void /* PRIVATE */
+png_flush(png_structp png_ptr)
+{
+ if (png_ptr->output_flush_fn != NULL)
+ (*(png_ptr->output_flush_fn))(png_ptr);
+}
+
+# ifdef PNG_STDIO_SUPPORTED
+void PNGCBAPI
+png_default_flush(png_structp png_ptr)
+{
+ png_FILE_p io_ptr;
+
+ if (png_ptr == NULL)
+ return;
+
+ io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
+ fflush(io_ptr);
+}
+# endif
+#endif
+
+/* This function allows the application to supply new output functions for
+ * libpng if standard C streams aren't being used.
+ *
+ * This function takes as its arguments:
+ * png_ptr - pointer to a png output data structure
+ * io_ptr - pointer to user supplied structure containing info about
+ * the output functions. May be NULL.
+ * write_data_fn - pointer to a new output function that takes as its
+ * arguments a pointer to a png_struct, a pointer to
+ * data to be written, and a 32-bit unsigned int that is
+ * the number of bytes to be written. The new write
+ * function should call png_error(png_ptr, "Error msg")
+ * to exit and output any fatal error messages. May be
+ * NULL, in which case libpng's default function will
+ * be used.
+ * flush_data_fn - pointer to a new flush function that takes as its
+ * arguments a pointer to a png_struct. After a call to
+ * the flush function, there should be no data in any buffers
+ * or pending transmission. If the output method doesn't do
+ * any buffering of output, a function prototype must still be
+ * supplied although it doesn't have to do anything. If
+ * PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
+ * time, output_flush_fn will be ignored, although it must be
+ * supplied for compatibility. May be NULL, in which case
+ * libpng's default function will be used, if
+ * PNG_WRITE_FLUSH_SUPPORTED is defined. This is not
+ * a good idea if io_ptr does not point to a standard
+ * *FILE structure.
+ */
+void PNGAPI
+png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
+ png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->io_ptr = io_ptr;
+
+#ifdef PNG_STDIO_SUPPORTED
+ if (write_data_fn != NULL)
+ png_ptr->write_data_fn = write_data_fn;
+
+ else
+ png_ptr->write_data_fn = png_default_write_data;
+#else
+ png_ptr->write_data_fn = write_data_fn;
+#endif
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+# ifdef PNG_STDIO_SUPPORTED
+
+ if (output_flush_fn != NULL)
+ png_ptr->output_flush_fn = output_flush_fn;
+
+ else
+ png_ptr->output_flush_fn = png_default_flush;
+
+# else
+ png_ptr->output_flush_fn = output_flush_fn;
+# endif
+#endif /* PNG_WRITE_FLUSH_SUPPORTED */
+
+ /* It is an error to read while writing a png file */
+ if (png_ptr->read_data_fn != NULL)
+ {
+ png_ptr->read_data_fn = NULL;
+
+ png_warning(png_ptr,
+ "Can't set both read_data_fn and write_data_fn in the"
+ " same structure");
+ }
+}
+
+#ifdef USE_FAR_KEYWORD
+# ifdef _MSC_VER
+void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
+{
+ void *near_ptr;
+ void FAR *far_ptr;
+ FP_OFF(near_ptr) = FP_OFF(ptr);
+ far_ptr = (void FAR *)near_ptr;
+
+ if (check != 0)
+ if (FP_SEG(ptr) != FP_SEG(far_ptr))
+ png_error(png_ptr, "segment lost in conversion");
+
+ return(near_ptr);
+}
+# else
+void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
+{
+ void *near_ptr;
+ void FAR *far_ptr;
+ near_ptr = (void FAR *)ptr;
+ far_ptr = (void FAR *)near_ptr;
+
+ if (check != 0)
+ if (far_ptr != ptr)
+ png_error(png_ptr, "segment lost in conversion");
+
+ return(near_ptr);
+}
+# endif
+#endif
+#endif /* PNG_WRITE_SUPPORTED */
--- /dev/null
+
+/* pngwrite.c - general routines to write a PNG file
+ *
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_WRITE_SUPPORTED
+
+/* Writes all the PNG information. This is the suggested way to use the
+ * library. If you have a new chunk to add, make a function to write it,
+ * and put it in the correct location here. If you want the chunk written
+ * after the image data, put it in png_write_end(). I strongly encourage
+ * you to supply a PNG_INFO_ flag, and check info_ptr->valid before writing
+ * the chunk, as that will keep the code from breaking if you want to just
+ * write a plain PNG file. If you have long comments, I suggest writing
+ * them in png_write_end(), and compressing them.
+ */
+void PNGAPI
+png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
+{
+ png_debug(1, "in png_write_info_before_PLTE");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
+ {
+ /* Write PNG signature */
+ png_write_sig(png_ptr);
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \
+ (png_ptr->mng_features_permitted))
+ {
+ png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
+ png_ptr->mng_features_permitted = 0;
+ }
+#endif
+
+ /* Write IHDR information. */
+ png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
+ info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
+ info_ptr->filter_type,
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ info_ptr->interlace_type);
+#else
+ 0);
+#endif
+ /* The rest of these check to see if the valid field has the appropriate
+ * flag set, and if it does, writes the chunk.
+ */
+#ifdef PNG_WRITE_gAMA_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_gAMA)
+ png_write_gAMA_fixed(png_ptr, info_ptr->gamma);
+#endif
+#ifdef PNG_WRITE_sRGB_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_sRGB)
+ png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
+#endif
+
+#ifdef PNG_WRITE_iCCP_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_iCCP)
+ png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
+ (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
+#endif
+#ifdef PNG_WRITE_sBIT_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_sBIT)
+ png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
+#endif
+#ifdef PNG_WRITE_cHRM_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_cHRM)
+ png_write_cHRM_fixed(png_ptr,
+ info_ptr->x_white, info_ptr->y_white,
+ info_ptr->x_red, info_ptr->y_red,
+ info_ptr->x_green, info_ptr->y_green,
+ info_ptr->x_blue, info_ptr->y_blue);
+#endif
+
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+ if (info_ptr->unknown_chunks_num)
+ {
+ png_unknown_chunk *up;
+
+ png_debug(5, "writing extra chunks");
+
+ for (up = info_ptr->unknown_chunks;
+ up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
+ up++)
+ {
+ int keep = png_handle_as_unknown(png_ptr, up->name);
+
+ if (keep != PNG_HANDLE_CHUNK_NEVER &&
+ up->location && !(up->location & PNG_HAVE_PLTE) &&
+ !(up->location & PNG_HAVE_IDAT) &&
+ ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
+ (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+ {
+ if (up->size == 0)
+ png_warning(png_ptr, "Writing zero-length unknown chunk");
+
+ png_write_chunk(png_ptr, up->name, up->data, up->size);
+ }
+ }
+ }
+#endif
+ png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE;
+ }
+}
+
+void PNGAPI
+png_write_info(png_structp png_ptr, png_infop info_ptr)
+{
+#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
+ int i;
+#endif
+
+ png_debug(1, "in png_write_info");
+
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ png_write_info_before_PLTE(png_ptr, info_ptr);
+
+ if (info_ptr->valid & PNG_INFO_PLTE)
+ png_write_PLTE(png_ptr, info_ptr->palette,
+ (png_uint_32)info_ptr->num_palette);
+
+ else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ png_error(png_ptr, "Valid palette required for paletted images");
+
+#ifdef PNG_WRITE_tRNS_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_tRNS)
+ {
+#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
+ /* Invert the alpha channel (in tRNS) */
+ if ((png_ptr->transformations & PNG_INVERT_ALPHA) &&
+ info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ int j;
+ for (j = 0; j<(int)info_ptr->num_trans; j++)
+ info_ptr->trans_alpha[j] =
+ (png_byte)(255 - info_ptr->trans_alpha[j]);
+ }
+#endif
+ png_write_tRNS(png_ptr, info_ptr->trans_alpha, &(info_ptr->trans_color),
+ info_ptr->num_trans, info_ptr->color_type);
+ }
+#endif
+#ifdef PNG_WRITE_bKGD_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_bKGD)
+ png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type);
+#endif
+
+#ifdef PNG_WRITE_hIST_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_hIST)
+ png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette);
+#endif
+
+#ifdef PNG_WRITE_oFFs_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_oFFs)
+ png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset,
+ info_ptr->offset_unit_type);
+#endif
+
+#ifdef PNG_WRITE_pCAL_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_pCAL)
+ png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0,
+ info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
+ info_ptr->pcal_units, info_ptr->pcal_params);
+#endif
+
+#ifdef PNG_WRITE_sCAL_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_sCAL)
+ png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit,
+ info_ptr->scal_s_width, info_ptr->scal_s_height);
+#endif /* sCAL */
+
+#ifdef PNG_WRITE_pHYs_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_pHYs)
+ png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit,
+ info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type);
+#endif /* pHYs */
+
+#ifdef PNG_WRITE_tIME_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_tIME)
+ {
+ png_write_tIME(png_ptr, &(info_ptr->mod_time));
+ png_ptr->mode |= PNG_WROTE_tIME;
+ }
+#endif /* tIME */
+
+#ifdef PNG_WRITE_sPLT_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_sPLT)
+ for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
+ png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
+#endif /* sPLT */
+
+#ifdef PNG_WRITE_TEXT_SUPPORTED
+ /* Check to see if we need to write text chunks */
+ for (i = 0; i < info_ptr->num_text; i++)
+ {
+ png_debug2(2, "Writing header text chunk %d, type %d", i,
+ info_ptr->text[i].compression);
+ /* An internationalized chunk? */
+ if (info_ptr->text[i].compression > 0)
+ {
+#ifdef PNG_WRITE_iTXt_SUPPORTED
+ /* Write international chunk */
+ png_write_iTXt(png_ptr,
+ info_ptr->text[i].compression,
+ info_ptr->text[i].key,
+ info_ptr->text[i].lang,
+ info_ptr->text[i].lang_key,
+ info_ptr->text[i].text);
+#else
+ png_warning(png_ptr, "Unable to write international text");
+#endif
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
+ }
+
+ /* If we want a compressed text chunk */
+ else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt)
+ {
+#ifdef PNG_WRITE_zTXt_SUPPORTED
+ /* Write compressed chunk */
+ png_write_zTXt(png_ptr, info_ptr->text[i].key,
+ info_ptr->text[i].text, 0,
+ info_ptr->text[i].compression);
+#else
+ png_warning(png_ptr, "Unable to write compressed text");
+#endif
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
+ }
+
+ else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
+ {
+#ifdef PNG_WRITE_tEXt_SUPPORTED
+ /* Write uncompressed chunk */
+ png_write_tEXt(png_ptr, info_ptr->text[i].key,
+ info_ptr->text[i].text,
+ 0);
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
+#else
+ /* Can't get here */
+ png_warning(png_ptr, "Unable to write uncompressed text");
+#endif
+ }
+ }
+#endif /* tEXt */
+
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+ if (info_ptr->unknown_chunks_num)
+ {
+ png_unknown_chunk *up;
+
+ png_debug(5, "writing extra chunks");
+
+ for (up = info_ptr->unknown_chunks;
+ up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
+ up++)
+ {
+ int keep = png_handle_as_unknown(png_ptr, up->name);
+ if (keep != PNG_HANDLE_CHUNK_NEVER &&
+ up->location && (up->location & PNG_HAVE_PLTE) &&
+ !(up->location & PNG_HAVE_IDAT) &&
+ ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
+ (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+ {
+ png_write_chunk(png_ptr, up->name, up->data, up->size);
+ }
+ }
+ }
+#endif
+}
+
+/* Writes the end of the PNG file. If you don't want to write comments or
+ * time information, you can pass NULL for info. If you already wrote these
+ * in png_write_info(), do not write them again here. If you have long
+ * comments, I suggest writing them here, and compressing them.
+ */
+void PNGAPI
+png_write_end(png_structp png_ptr, png_infop info_ptr)
+{
+ png_debug(1, "in png_write_end");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (!(png_ptr->mode & PNG_HAVE_IDAT))
+ png_error(png_ptr, "No IDATs written into file");
+
+ /* See if user wants us to write information chunks */
+ if (info_ptr != NULL)
+ {
+#ifdef PNG_WRITE_TEXT_SUPPORTED
+ int i; /* local index variable */
+#endif
+#ifdef PNG_WRITE_tIME_SUPPORTED
+ /* Check to see if user has supplied a time chunk */
+ if ((info_ptr->valid & PNG_INFO_tIME) &&
+ !(png_ptr->mode & PNG_WROTE_tIME))
+ png_write_tIME(png_ptr, &(info_ptr->mod_time));
+
+#endif
+#ifdef PNG_WRITE_TEXT_SUPPORTED
+ /* Loop through comment chunks */
+ for (i = 0; i < info_ptr->num_text; i++)
+ {
+ png_debug2(2, "Writing trailer text chunk %d, type %d", i,
+ info_ptr->text[i].compression);
+ /* An internationalized chunk? */
+ if (info_ptr->text[i].compression > 0)
+ {
+#ifdef PNG_WRITE_iTXt_SUPPORTED
+ /* Write international chunk */
+ png_write_iTXt(png_ptr,
+ info_ptr->text[i].compression,
+ info_ptr->text[i].key,
+ info_ptr->text[i].lang,
+ info_ptr->text[i].lang_key,
+ info_ptr->text[i].text);
+#else
+ png_warning(png_ptr, "Unable to write international text");
+#endif
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
+ }
+
+ else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
+ {
+#ifdef PNG_WRITE_zTXt_SUPPORTED
+ /* Write compressed chunk */
+ png_write_zTXt(png_ptr, info_ptr->text[i].key,
+ info_ptr->text[i].text, 0,
+ info_ptr->text[i].compression);
+#else
+ png_warning(png_ptr, "Unable to write compressed text");
+#endif
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
+ }
+
+ else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
+ {
+#ifdef PNG_WRITE_tEXt_SUPPORTED
+ /* Write uncompressed chunk */
+ png_write_tEXt(png_ptr, info_ptr->text[i].key,
+ info_ptr->text[i].text, 0);
+#else
+ png_warning(png_ptr, "Unable to write uncompressed text");
+#endif
+
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
+ }
+ }
+#endif
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+ if (info_ptr->unknown_chunks_num)
+ {
+ png_unknown_chunk *up;
+
+ png_debug(5, "writing extra chunks");
+
+ for (up = info_ptr->unknown_chunks;
+ up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
+ up++)
+ {
+ int keep = png_handle_as_unknown(png_ptr, up->name);
+ if (keep != PNG_HANDLE_CHUNK_NEVER &&
+ up->location && (up->location & PNG_AFTER_IDAT) &&
+ ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
+ (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+ {
+ png_write_chunk(png_ptr, up->name, up->data, up->size);
+ }
+ }
+ }
+#endif
+ }
+
+ png_ptr->mode |= PNG_AFTER_IDAT;
+
+ /* Write end of PNG file */
+ png_write_IEND(png_ptr);
+ /* This flush, added in libpng-1.0.8, removed from libpng-1.0.9beta03,
+ * and restored again in libpng-1.2.30, may cause some applications that
+ * do not set png_ptr->output_flush_fn to crash. If your application
+ * experiences a problem, please try building libpng with
+ * PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED defined, and report the event to
+ * png-mng-implement at lists.sf.net .
+ */
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+# ifdef PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED
+ png_flush(png_ptr);
+# endif
+#endif
+}
+
+#ifdef PNG_CONVERT_tIME_SUPPORTED
+/* "tm" structure is not supported on WindowsCE */
+void PNGAPI
+png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime)
+{
+ png_debug(1, "in png_convert_from_struct_tm");
+
+ ptime->year = (png_uint_16)(1900 + ttime->tm_year);
+ ptime->month = (png_byte)(ttime->tm_mon + 1);
+ ptime->day = (png_byte)ttime->tm_mday;
+ ptime->hour = (png_byte)ttime->tm_hour;
+ ptime->minute = (png_byte)ttime->tm_min;
+ ptime->second = (png_byte)ttime->tm_sec;
+}
+
+void PNGAPI
+png_convert_from_time_t(png_timep ptime, time_t ttime)
+{
+ struct tm *tbuf;
+
+ png_debug(1, "in png_convert_from_time_t");
+
+ tbuf = gmtime(&ttime);
+ png_convert_from_struct_tm(ptime, tbuf);
+}
+#endif
+
+/* Initialize png_ptr structure, and allocate any memory needed */
+PNG_FUNCTION(png_structp,PNGAPI
+png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED)
+{
+#ifdef PNG_USER_MEM_SUPPORTED
+ return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn,
+ warn_fn, NULL, NULL, NULL));
+}
+
+/* Alternate initialize png_ptr structure, and allocate any memory needed */
+static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */
+
+PNG_FUNCTION(png_structp,PNGAPI
+png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
+ png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED)
+{
+#endif /* PNG_USER_MEM_SUPPORTED */
+ volatile int png_cleanup_needed = 0;
+#ifdef PNG_SETJMP_SUPPORTED
+ volatile
+#endif
+ png_structp png_ptr;
+#ifdef PNG_SETJMP_SUPPORTED
+#ifdef USE_FAR_KEYWORD
+ jmp_buf png_jmpbuf;
+#endif
+#endif
+ int i;
+
+ png_debug(1, "in png_create_write_struct");
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
+ (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
+#else
+ png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
+#endif /* PNG_USER_MEM_SUPPORTED */
+ if (png_ptr == NULL)
+ return (NULL);
+
+ /* Added at libpng-1.2.6 */
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
+ png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
+#endif
+
+#ifdef PNG_SETJMP_SUPPORTED
+/* Applications that neglect to set up their own setjmp() and then
+ encounter a png_error() will longjmp here. Since the jmpbuf is
+ then meaningless we abort instead of returning. */
+#ifdef USE_FAR_KEYWORD
+ if (setjmp(png_jmpbuf))
+#else
+ if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */
+#endif
+#ifdef USE_FAR_KEYWORD
+ png_memcpy(png_jmpbuf(png_ptr), png_jmpbuf, png_sizeof(jmp_buf));
+#endif
+ PNG_ABORT();
+#endif
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
+#endif /* PNG_USER_MEM_SUPPORTED */
+ png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
+
+ if (user_png_ver)
+ {
+ i = 0;
+ do
+ {
+ if (user_png_ver[i] != png_libpng_ver[i])
+ png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
+ } while (png_libpng_ver[i++]);
+ }
+
+ if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
+ {
+ /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
+ * we must recompile any applications that use any older library version.
+ * For versions after libpng 1.0, we will be compatible, so we need
+ * only check the first digit.
+ */
+ if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
+ (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
+ (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
+ {
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ char msg[80];
+
+ if (user_png_ver)
+ {
+ png_snprintf2(msg, 80,
+ "Application built with libpng-%.20s"
+ " but running with %.20s",
+ user_png_ver,
+ png_libpng_ver);
+ png_warning(png_ptr, msg);
+ }
+#else
+ png_warning(png_ptr,
+ "Incompatible libpng version in application and library");
+#endif
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+ png_ptr->flags = 0;
+#endif
+ png_cleanup_needed = 1;
+ }
+ }
+
+ /* Initialize zbuf - compression buffer */
+ png_ptr->zbuf_size = PNG_ZBUF_SIZE;
+
+ if (!png_cleanup_needed)
+ {
+ png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr,
+ png_ptr->zbuf_size);
+ if (png_ptr->zbuf == NULL)
+ png_cleanup_needed = 1;
+ }
+
+ if (png_cleanup_needed)
+ {
+ /* Clean up PNG structure and deallocate any memory. */
+ png_free(png_ptr, png_ptr->zbuf);
+ png_ptr->zbuf = NULL;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)png_ptr,
+ (png_free_ptr)free_fn, (png_voidp)mem_ptr);
+#else
+ png_destroy_struct((png_voidp)png_ptr);
+#endif
+ return (NULL);
+ }
+
+ png_set_write_fn(png_ptr, NULL, NULL, NULL);
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ png_reset_filter_heuristics(png_ptr);
+#endif
+
+ return (png_ptr);
+}
+
+
+/* Write a few rows of image data. If the image is interlaced,
+ * either you will have to write the 7 sub images, or, if you
+ * have called png_set_interlace_handling(), you will have to
+ * "write" the image seven times.
+ */
+void PNGAPI
+png_write_rows(png_structp png_ptr, png_bytepp row,
+ png_uint_32 num_rows)
+{
+ png_uint_32 i; /* row counter */
+ png_bytepp rp; /* row pointer */
+
+ png_debug(1, "in png_write_rows");
+
+ if (png_ptr == NULL)
+ return;
+
+ /* Loop through the rows */
+ for (i = 0, rp = row; i < num_rows; i++, rp++)
+ {
+ png_write_row(png_ptr, *rp);
+ }
+}
+
+/* Write the image. You only need to call this function once, even
+ * if you are writing an interlaced image.
+ */
+void PNGAPI
+png_write_image(png_structp png_ptr, png_bytepp image)
+{
+ png_uint_32 i; /* row index */
+ int pass, num_pass; /* pass variables */
+ png_bytepp rp; /* points to current row */
+
+ if (png_ptr == NULL)
+ return;
+
+ png_debug(1, "in png_write_image");
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ /* Initialize interlace handling. If image is not interlaced,
+ * this will set pass to 1
+ */
+ num_pass = png_set_interlace_handling(png_ptr);
+#else
+ num_pass = 1;
+#endif
+ /* Loop through passes */
+ for (pass = 0; pass < num_pass; pass++)
+ {
+ /* Loop through image */
+ for (i = 0, rp = image; i < png_ptr->height; i++, rp++)
+ {
+ png_write_row(png_ptr, *rp);
+ }
+ }
+}
+
+/* Called by user to write a row of image data */
+void PNGAPI
+png_write_row(png_structp png_ptr, png_const_bytep row)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_debug2(1, "in png_write_row (row %u, pass %d)",
+ png_ptr->row_number, png_ptr->pass);
+
+ /* Initialize transformations and other stuff if first time */
+ if (png_ptr->row_number == 0 && png_ptr->pass == 0)
+ {
+ /* Make sure we wrote the header info */
+ if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
+ png_error(png_ptr,
+ "png_write_info was never called before png_write_row");
+
+ /* Check for transforms that have been set but were defined out */
+#if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED)
+ if (png_ptr->transformations & PNG_INVERT_MONO)
+ png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined");
+#endif
+
+#if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED)
+ if (png_ptr->transformations & PNG_FILLER)
+ png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined");
+#endif
+#if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \
+ defined(PNG_READ_PACKSWAP_SUPPORTED)
+ if (png_ptr->transformations & PNG_PACKSWAP)
+ png_warning(png_ptr,
+ "PNG_WRITE_PACKSWAP_SUPPORTED is not defined");
+#endif
+
+#if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED)
+ if (png_ptr->transformations & PNG_PACK)
+ png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined");
+#endif
+
+#if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED)
+ if (png_ptr->transformations & PNG_SHIFT)
+ png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined");
+#endif
+
+#if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED)
+ if (png_ptr->transformations & PNG_BGR)
+ png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined");
+#endif
+
+#if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED)
+ if (png_ptr->transformations & PNG_SWAP_BYTES)
+ png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined");
+#endif
+
+ png_write_start_row(png_ptr);
+ }
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ /* If interlaced and not interested in row, return */
+ if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
+ {
+ switch (png_ptr->pass)
+ {
+ case 0:
+ if (png_ptr->row_number & 0x07)
+ {
+ png_write_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 1:
+ if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
+ {
+ png_write_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 2:
+ if ((png_ptr->row_number & 0x07) != 4)
+ {
+ png_write_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 3:
+ if ((png_ptr->row_number & 0x03) || png_ptr->width < 3)
+ {
+ png_write_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 4:
+ if ((png_ptr->row_number & 0x03) != 2)
+ {
+ png_write_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 5:
+ if ((png_ptr->row_number & 0x01) || png_ptr->width < 2)
+ {
+ png_write_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ case 6:
+ if (!(png_ptr->row_number & 0x01))
+ {
+ png_write_finish_row(png_ptr);
+ return;
+ }
+ break;
+
+ default: /* error: ignore it */
+ break;
+ }
+ }
+#endif
+
+ /* Set up row info for transformations */
+ png_ptr->row_info.color_type = png_ptr->color_type;
+ png_ptr->row_info.width = png_ptr->usr_width;
+ png_ptr->row_info.channels = png_ptr->usr_channels;
+ png_ptr->row_info.bit_depth = png_ptr->usr_bit_depth;
+ png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
+ png_ptr->row_info.channels);
+
+ png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
+ png_ptr->row_info.width);
+
+ png_debug1(3, "row_info->color_type = %d", png_ptr->row_info.color_type);
+ png_debug1(3, "row_info->width = %u", png_ptr->row_info.width);
+ png_debug1(3, "row_info->channels = %d", png_ptr->row_info.channels);
+ png_debug1(3, "row_info->bit_depth = %d", png_ptr->row_info.bit_depth);
+ png_debug1(3, "row_info->pixel_depth = %d", png_ptr->row_info.pixel_depth);
+ png_debug1(3, "row_info->rowbytes = %lu",
+ (unsigned long)png_ptr->row_info.rowbytes);
+
+ /* Copy user's row into buffer, leaving room for filter byte. */
+ png_memcpy(png_ptr->row_buf + 1, row, png_ptr->row_info.rowbytes);
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ /* Handle interlacing */
+ if (png_ptr->interlaced && png_ptr->pass < 6 &&
+ (png_ptr->transformations & PNG_INTERLACE))
+ {
+ png_do_write_interlace(&(png_ptr->row_info),
+ png_ptr->row_buf + 1, png_ptr->pass);
+ /* This should always get caught above, but still ... */
+ if (!(png_ptr->row_info.width))
+ {
+ png_write_finish_row(png_ptr);
+ return;
+ }
+ }
+#endif
+
+ /* Handle other transformations */
+ if (png_ptr->transformations)
+ png_do_write_transformations(png_ptr);
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ /* Write filter_method 64 (intrapixel differencing) only if
+ * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
+ * 2. Libpng did not write a PNG signature (this filter_method is only
+ * used in PNG datastreams that are embedded in MNG datastreams) and
+ * 3. The application called png_permit_mng_features with a mask that
+ * included PNG_FLAG_MNG_FILTER_64 and
+ * 4. The filter_method is 64 and
+ * 5. The color_type is RGB or RGBA
+ */
+ if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+ (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
+ {
+ /* Intrapixel differencing */
+ png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
+ }
+#endif
+
+ /* Find a filter if necessary, filter the row and write it out. */
+ png_write_find_filter(png_ptr, &(png_ptr->row_info));
+
+ if (png_ptr->write_row_fn != NULL)
+ (*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
+}
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+/* Set the automatic flush interval or 0 to turn flushing off */
+void PNGAPI
+png_set_flush(png_structp png_ptr, int nrows)
+{
+ png_debug(1, "in png_set_flush");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
+}
+
+/* Flush the current output buffers now */
+void PNGAPI
+png_write_flush(png_structp png_ptr)
+{
+ int wrote_IDAT;
+
+ png_debug(1, "in png_write_flush");
+
+ if (png_ptr == NULL)
+ return;
+
+ /* We have already written out all of the data */
+ if (png_ptr->row_number >= png_ptr->num_rows)
+ return;
+
+ do
+ {
+ int ret;
+
+ /* Compress the data */
+ ret = deflate(&png_ptr->zstream, Z_SYNC_FLUSH);
+ wrote_IDAT = 0;
+
+ /* Check for compression errors */
+ if (ret != Z_OK)
+ {
+ if (png_ptr->zstream.msg != NULL)
+ png_error(png_ptr, png_ptr->zstream.msg);
+
+ else
+ png_error(png_ptr, "zlib error");
+ }
+
+ if (!(png_ptr->zstream.avail_out))
+ {
+ /* Write the IDAT and reset the zlib output buffer */
+ png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ wrote_IDAT = 1;
+ }
+ } while (wrote_IDAT == 1);
+
+ /* If there is any data left to be output, write it into a new IDAT */
+ if (png_ptr->zbuf_size != png_ptr->zstream.avail_out)
+ {
+ /* Write the IDAT and reset the zlib output buffer */
+ png_write_IDAT(png_ptr, png_ptr->zbuf,
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ }
+ png_ptr->flush_rows = 0;
+ png_flush(png_ptr);
+}
+#endif /* PNG_WRITE_FLUSH_SUPPORTED */
+
+/* Free all memory used by the write */
+void PNGAPI
+png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
+{
+ png_structp png_ptr = NULL;
+ png_infop info_ptr = NULL;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_free_ptr free_fn = NULL;
+ png_voidp mem_ptr = NULL;
+#endif
+
+ png_debug(1, "in png_destroy_write_struct");
+
+ if (png_ptr_ptr != NULL)
+ {
+ png_ptr = *png_ptr_ptr;
+#ifdef PNG_USER_MEM_SUPPORTED
+ free_fn = png_ptr->free_fn;
+ mem_ptr = png_ptr->mem_ptr;
+#endif
+ }
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ if (png_ptr != NULL)
+ {
+ free_fn = png_ptr->free_fn;
+ mem_ptr = png_ptr->mem_ptr;
+ }
+#endif
+
+ if (info_ptr_ptr != NULL)
+ info_ptr = *info_ptr_ptr;
+
+ if (info_ptr != NULL)
+ {
+ if (png_ptr != NULL)
+ {
+ png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ if (png_ptr->num_chunk_list)
+ {
+ png_free(png_ptr, png_ptr->chunk_list);
+ png_ptr->num_chunk_list = 0;
+ }
+#endif
+ }
+
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
+ (png_voidp)mem_ptr);
+#else
+ png_destroy_struct((png_voidp)info_ptr);
+#endif
+ *info_ptr_ptr = NULL;
+ }
+
+ if (png_ptr != NULL)
+ {
+ png_write_destroy(png_ptr);
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
+ (png_voidp)mem_ptr);
+#else
+ png_destroy_struct((png_voidp)png_ptr);
+#endif
+ *png_ptr_ptr = NULL;
+ }
+}
+
+
+/* Free any memory used in png_ptr struct (old method) */
+void /* PRIVATE */
+png_write_destroy(png_structp png_ptr)
+{
+#ifdef PNG_SETJMP_SUPPORTED
+ jmp_buf tmp_jmp; /* Save jump buffer */
+#endif
+ png_error_ptr error_fn;
+ png_error_ptr warning_fn;
+ png_voidp error_ptr;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_free_ptr free_fn;
+#endif
+
+ png_debug(1, "in png_write_destroy");
+
+ /* Free any memory zlib uses */
+ deflateEnd(&png_ptr->zstream);
+
+ /* Free our memory. png_free checks NULL for us. */
+ png_free(png_ptr, png_ptr->zbuf);
+ png_free(png_ptr, png_ptr->row_buf);
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ png_free(png_ptr, png_ptr->prev_row);
+ png_free(png_ptr, png_ptr->sub_row);
+ png_free(png_ptr, png_ptr->up_row);
+ png_free(png_ptr, png_ptr->avg_row);
+ png_free(png_ptr, png_ptr->paeth_row);
+#endif
+
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+ png_free(png_ptr, png_ptr->time_buffer);
+#endif
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ /* Use this to save a little code space, it doesn't free the filter_costs */
+ png_reset_filter_heuristics(png_ptr);
+ png_free(png_ptr, png_ptr->filter_costs);
+ png_free(png_ptr, png_ptr->inv_filter_costs);
+#endif
+
+#ifdef PNG_SETJMP_SUPPORTED
+ /* Reset structure */
+ png_memcpy(tmp_jmp, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
+#endif
+
+ error_fn = png_ptr->error_fn;
+ warning_fn = png_ptr->warning_fn;
+ error_ptr = png_ptr->error_ptr;
+#ifdef PNG_USER_MEM_SUPPORTED
+ free_fn = png_ptr->free_fn;
+#endif
+
+ png_memset(png_ptr, 0, png_sizeof(png_struct));
+
+ png_ptr->error_fn = error_fn;
+ png_ptr->warning_fn = warning_fn;
+ png_ptr->error_ptr = error_ptr;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_ptr->free_fn = free_fn;
+#endif
+
+#ifdef PNG_SETJMP_SUPPORTED
+ png_memcpy(png_ptr->png_jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
+#endif
+}
+
+/* Allow the application to select one or more row filters to use. */
+void PNGAPI
+png_set_filter(png_structp png_ptr, int method, int filters)
+{
+ png_debug(1, "in png_set_filter");
+
+ if (png_ptr == NULL)
+ return;
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+ (method == PNG_INTRAPIXEL_DIFFERENCING))
+ method = PNG_FILTER_TYPE_BASE;
+
+#endif
+ if (method == PNG_FILTER_TYPE_BASE)
+ {
+ switch (filters & (PNG_ALL_FILTERS | 0x07))
+ {
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ case 5:
+ case 6:
+ case 7: png_warning(png_ptr, "Unknown row filter for method 0");
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
+ case PNG_FILTER_VALUE_NONE:
+ png_ptr->do_filter = PNG_FILTER_NONE; break;
+
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ case PNG_FILTER_VALUE_SUB:
+ png_ptr->do_filter = PNG_FILTER_SUB; break;
+
+ case PNG_FILTER_VALUE_UP:
+ png_ptr->do_filter = PNG_FILTER_UP; break;
+
+ case PNG_FILTER_VALUE_AVG:
+ png_ptr->do_filter = PNG_FILTER_AVG; break;
+
+ case PNG_FILTER_VALUE_PAETH:
+ png_ptr->do_filter = PNG_FILTER_PAETH; break;
+
+ default:
+ png_ptr->do_filter = (png_byte)filters; break;
+#else
+ default:
+ png_warning(png_ptr, "Unknown row filter for method 0");
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
+ }
+
+ /* If we have allocated the row_buf, this means we have already started
+ * with the image and we should have allocated all of the filter buffers
+ * that have been selected. If prev_row isn't already allocated, then
+ * it is too late to start using the filters that need it, since we
+ * will be missing the data in the previous row. If an application
+ * wants to start and stop using particular filters during compression,
+ * it should start out with all of the filters, and then add and
+ * remove them after the start of compression.
+ */
+ if (png_ptr->row_buf != NULL)
+ {
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
+ {
+ png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
+ (png_ptr->rowbytes + 1));
+ png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
+ }
+
+ if ((png_ptr->do_filter & PNG_FILTER_UP) && png_ptr->up_row == NULL)
+ {
+ if (png_ptr->prev_row == NULL)
+ {
+ png_warning(png_ptr, "Can't add Up filter after starting");
+ png_ptr->do_filter = (png_byte)(png_ptr->do_filter &
+ ~PNG_FILTER_UP);
+ }
+
+ else
+ {
+ png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
+ (png_ptr->rowbytes + 1));
+ png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
+ }
+ }
+
+ if ((png_ptr->do_filter & PNG_FILTER_AVG) && png_ptr->avg_row == NULL)
+ {
+ if (png_ptr->prev_row == NULL)
+ {
+ png_warning(png_ptr, "Can't add Average filter after starting");
+ png_ptr->do_filter = (png_byte)(png_ptr->do_filter &
+ ~PNG_FILTER_AVG);
+ }
+
+ else
+ {
+ png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
+ (png_ptr->rowbytes + 1));
+ png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
+ }
+ }
+
+ if ((png_ptr->do_filter & PNG_FILTER_PAETH) &&
+ png_ptr->paeth_row == NULL)
+ {
+ if (png_ptr->prev_row == NULL)
+ {
+ png_warning(png_ptr, "Can't add Paeth filter after starting");
+ png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH);
+ }
+
+ else
+ {
+ png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
+ (png_ptr->rowbytes + 1));
+ png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
+ }
+ }
+
+ if (png_ptr->do_filter == PNG_NO_FILTERS)
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
+ png_ptr->do_filter = PNG_FILTER_NONE;
+ }
+ }
+ else
+ png_error(png_ptr, "Unknown custom filter method");
+}
+
+/* This allows us to influence the way in which libpng chooses the "best"
+ * filter for the current scanline. While the "minimum-sum-of-absolute-
+ * differences metric is relatively fast and effective, there is some
+ * question as to whether it can be improved upon by trying to keep the
+ * filtered data going to zlib more consistent, hopefully resulting in
+ * better compression.
+ */
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
+/* Convenience reset API. */
+static void
+png_reset_filter_heuristics(png_structp png_ptr)
+{
+ /* Clear out any old values in the 'weights' - this must be done because if
+ * the app calls set_filter_heuristics multiple times with different
+ * 'num_weights' values we would otherwise potentially have wrong sized
+ * arrays.
+ */
+ png_ptr->num_prev_filters = 0;
+ png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED;
+ if (png_ptr->prev_filters != NULL)
+ {
+ png_bytep old = png_ptr->prev_filters;
+ png_ptr->prev_filters = NULL;
+ png_free(png_ptr, old);
+ }
+ if (png_ptr->filter_weights != NULL)
+ {
+ png_uint_16p old = png_ptr->filter_weights;
+ png_ptr->filter_weights = NULL;
+ png_free(png_ptr, old);
+ }
+
+ if (png_ptr->inv_filter_weights != NULL)
+ {
+ png_uint_16p old = png_ptr->inv_filter_weights;
+ png_ptr->inv_filter_weights = NULL;
+ png_free(png_ptr, old);
+ }
+
+ /* Leave the filter_costs - this array is fixed size. */
+}
+
+static int
+png_init_filter_heuristics(png_structp png_ptr, int heuristic_method,
+ int num_weights)
+{
+ if (png_ptr == NULL)
+ return 0;
+
+ /* Clear out the arrays */
+ png_reset_filter_heuristics(png_ptr);
+
+ /* Check arguments; the 'reset' function makes the correct settings for the
+ * unweighted case, but we must handle the weight case by initializing the
+ * arrays for the caller.
+ */
+ if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int i;
+
+ if (num_weights > 0)
+ {
+ png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr,
+ (png_uint_32)(png_sizeof(png_byte) * num_weights));
+
+ /* To make sure that the weighting starts out fairly */
+ for (i = 0; i < num_weights; i++)
+ {
+ png_ptr->prev_filters[i] = 255;
+ }
+
+ png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
+ (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
+
+ png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
+ (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
+
+ for (i = 0; i < num_weights; i++)
+ {
+ png_ptr->inv_filter_weights[i] =
+ png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
+ }
+
+ /* Safe to set this now */
+ png_ptr->num_prev_filters = (png_byte)num_weights;
+ }
+
+ /* If, in the future, there are other filter methods, this would
+ * need to be based on png_ptr->filter.
+ */
+ if (png_ptr->filter_costs == NULL)
+ {
+ png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
+ (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
+
+ png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
+ (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
+ }
+
+ for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
+ {
+ png_ptr->inv_filter_costs[i] =
+ png_ptr->filter_costs[i] = PNG_COST_FACTOR;
+ }
+
+ /* All the arrays are inited, safe to set this: */
+ png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_WEIGHTED;
+
+ /* Return the 'ok' code. */
+ return 1;
+ }
+ else if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT ||
+ heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED)
+ {
+ return 1;
+ }
+ else
+ {
+ png_warning(png_ptr, "Unknown filter heuristic method");
+ return 0;
+ }
+}
+
+/* Provide floating and fixed point APIs */
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
+ int num_weights, png_const_doublep filter_weights,
+ png_const_doublep filter_costs)
+{
+ png_debug(1, "in png_set_filter_heuristics");
+
+ /* The internal API allocates all the arrays and ensures that the elements of
+ * those arrays are set to the default value.
+ */
+ if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
+ return;
+
+ /* If using the weighted method copy in the weights. */
+ if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int i;
+ for (i = 0; i < num_weights; i++)
+ {
+ if (filter_weights[i] <= 0.0)
+ {
+ png_ptr->inv_filter_weights[i] =
+ png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
+ }
+
+ else
+ {
+ png_ptr->inv_filter_weights[i] =
+ (png_uint_16)(PNG_WEIGHT_FACTOR*filter_weights[i]+.5);
+
+ png_ptr->filter_weights[i] =
+ (png_uint_16)(PNG_WEIGHT_FACTOR/filter_weights[i]+.5);
+ }
+ }
+
+ /* Here is where we set the relative costs of the different filters. We
+ * should take the desired compression level into account when setting
+ * the costs, so that Paeth, for instance, has a high relative cost at low
+ * compression levels, while it has a lower relative cost at higher
+ * compression settings. The filter types are in order of increasing
+ * relative cost, so it would be possible to do this with an algorithm.
+ */
+ for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) if (filter_costs[i] >= 1.0)
+ {
+ png_ptr->inv_filter_costs[i] =
+ (png_uint_16)(PNG_COST_FACTOR / filter_costs[i] + .5);
+
+ png_ptr->filter_costs[i] =
+ (png_uint_16)(PNG_COST_FACTOR * filter_costs[i] + .5);
+ }
+ }
+}
+#endif /* FLOATING_POINT */
+
+#ifdef PNG_FIXED_POINT_SUPPORTED
+void PNGAPI
+png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method,
+ int num_weights, png_const_fixed_point_p filter_weights,
+ png_const_fixed_point_p filter_costs)
+{
+ png_debug(1, "in png_set_filter_heuristics_fixed");
+
+ /* The internal API allocates all the arrays and ensures that the elements of
+ * those arrays are set to the default value.
+ */
+ if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
+ return;
+
+ /* If using the weighted method copy in the weights. */
+ if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int i;
+ for (i = 0; i < num_weights; i++)
+ {
+ if (filter_weights[i] <= 0)
+ {
+ png_ptr->inv_filter_weights[i] =
+ png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
+ }
+
+ else
+ {
+ png_ptr->inv_filter_weights[i] = (png_uint_16)
+ ((PNG_WEIGHT_FACTOR*filter_weights[i]+PNG_FP_HALF)/PNG_FP_1);
+
+ png_ptr->filter_weights[i] = (png_uint_16)((PNG_WEIGHT_FACTOR*
+ PNG_FP_1+(filter_weights[i]/2))/filter_weights[i]);
+ }
+ }
+
+ /* Here is where we set the relative costs of the different filters. We
+ * should take the desired compression level into account when setting
+ * the costs, so that Paeth, for instance, has a high relative cost at low
+ * compression levels, while it has a lower relative cost at higher
+ * compression settings. The filter types are in order of increasing
+ * relative cost, so it would be possible to do this with an algorithm.
+ */
+ for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
+ if (filter_costs[i] >= PNG_FP_1)
+ {
+ png_uint_32 tmp;
+
+ /* Use a 32 bit unsigned temporary here because otherwise the
+ * intermediate value will be a 32 bit *signed* integer (ANSI rules)
+ * and this will get the wrong answer on division.
+ */
+ tmp = PNG_COST_FACTOR*PNG_FP_1 + (filter_costs[i]/2);
+ tmp /= filter_costs[i];
+
+ png_ptr->inv_filter_costs[i] = (png_uint_16)tmp;
+
+ tmp = PNG_COST_FACTOR * filter_costs[i] + PNG_FP_HALF;
+ tmp /= PNG_FP_1;
+
+ png_ptr->filter_costs[i] = (png_uint_16)tmp;
+ }
+ }
+}
+#endif /* FIXED_POINT */
+#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
+
+void PNGAPI
+png_set_compression_level(png_structp png_ptr, int level)
+{
+ png_debug(1, "in png_set_compression_level");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
+ png_ptr->zlib_level = level;
+}
+
+void PNGAPI
+png_set_compression_mem_level(png_structp png_ptr, int mem_level)
+{
+ png_debug(1, "in png_set_compression_mem_level");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
+ png_ptr->zlib_mem_level = mem_level;
+}
+
+void PNGAPI
+png_set_compression_strategy(png_structp png_ptr, int strategy)
+{
+ png_debug(1, "in png_set_compression_strategy");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
+ png_ptr->zlib_strategy = strategy;
+}
+
+void PNGAPI
+png_set_compression_window_bits(png_structp png_ptr, int window_bits)
+{
+ if (png_ptr == NULL)
+ return;
+
+ if (window_bits > 15)
+ png_warning(png_ptr, "Only compression windows <= 32k supported by PNG");
+
+ else if (window_bits < 8)
+ png_warning(png_ptr, "Only compression windows >= 256 supported by PNG");
+
+#ifndef WBITS_8_OK
+ /* Avoid libpng bug with 256-byte windows */
+ if (window_bits == 8)
+ {
+ png_warning(png_ptr, "Compression window is being reset to 512");
+ window_bits = 9;
+ }
+
+#endif
+ png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS;
+ png_ptr->zlib_window_bits = window_bits;
+}
+
+void PNGAPI
+png_set_compression_method(png_structp png_ptr, int method)
+{
+ png_debug(1, "in png_set_compression_method");
+
+ if (png_ptr == NULL)
+ return;
+
+ if (method != 8)
+ png_warning(png_ptr, "Only compression method 8 is supported by PNG");
+
+ png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD;
+ png_ptr->zlib_method = method;
+}
+
+void PNGAPI
+png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->write_row_fn = write_row_fn;
+}
+
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+void PNGAPI
+png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
+ write_user_transform_fn)
+{
+ png_debug(1, "in png_set_write_user_transform_fn");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= PNG_USER_TRANSFORM;
+ png_ptr->write_user_transform_fn = write_user_transform_fn;
+}
+#endif
+
+
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+void PNGAPI
+png_write_png(png_structp png_ptr, png_infop info_ptr,
+ int transforms, voidp params)
+{
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ /* Write the file header information. */
+ png_write_info(png_ptr, info_ptr);
+
+ /* ------ these transformations don't touch the info structure ------- */
+
+#ifdef PNG_WRITE_INVERT_SUPPORTED
+ /* Invert monochrome pixels */
+ if (transforms & PNG_TRANSFORM_INVERT_MONO)
+ png_set_invert_mono(png_ptr);
+#endif
+
+#ifdef PNG_WRITE_SHIFT_SUPPORTED
+ /* Shift the pixels up to a legal bit depth and fill in
+ * as appropriate to correctly scale the image.
+ */
+ if ((transforms & PNG_TRANSFORM_SHIFT)
+ && (info_ptr->valid & PNG_INFO_sBIT))
+ png_set_shift(png_ptr, &info_ptr->sig_bit);
+#endif
+
+#ifdef PNG_WRITE_PACK_SUPPORTED
+ /* Pack pixels into bytes */
+ if (transforms & PNG_TRANSFORM_PACKING)
+ png_set_packing(png_ptr);
+#endif
+
+#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
+ /* Swap location of alpha bytes from ARGB to RGBA */
+ if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
+ png_set_swap_alpha(png_ptr);
+#endif
+
+#ifdef PNG_WRITE_FILLER_SUPPORTED
+ /* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
+ if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
+ png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
+
+ else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE)
+ png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
+#endif
+
+#ifdef PNG_WRITE_BGR_SUPPORTED
+ /* Flip BGR pixels to RGB */
+ if (transforms & PNG_TRANSFORM_BGR)
+ png_set_bgr(png_ptr);
+#endif
+
+#ifdef PNG_WRITE_SWAP_SUPPORTED
+ /* Swap bytes of 16-bit files to most significant byte first */
+ if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
+ png_set_swap(png_ptr);
+#endif
+
+#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
+ /* Swap bits of 1, 2, 4 bit packed pixel formats */
+ if (transforms & PNG_TRANSFORM_PACKSWAP)
+ png_set_packswap(png_ptr);
+#endif
+
+#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
+ /* Invert the alpha channel from opacity to transparency */
+ if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
+ png_set_invert_alpha(png_ptr);
+#endif
+
+ /* ----------------------- end of transformations ------------------- */
+
+ /* Write the bits */
+ if (info_ptr->valid & PNG_INFO_IDAT)
+ png_write_image(png_ptr, info_ptr->row_pointers);
+
+ /* It is REQUIRED to call this to finish writing the rest of the file */
+ png_write_end(png_ptr, info_ptr);
+
+ PNG_UNUSED(transforms) /* Quiet compiler warnings */
+ PNG_UNUSED(params)
+}
+#endif
+#endif /* PNG_WRITE_SUPPORTED */
--- /dev/null
+
+/* pngwtran.c - transforms the data in a row for PNG writers
+ *
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_WRITE_SUPPORTED
+
+/* Transform the data according to the user's wishes. The order of
+ * transformations is significant.
+ */
+void /* PRIVATE */
+png_do_write_transformations(png_structp png_ptr)
+{
+ png_debug(1, "in png_do_write_transformations");
+
+ if (png_ptr == NULL)
+ return;
+
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+ if (png_ptr->transformations & PNG_USER_TRANSFORM)
+ if (png_ptr->write_user_transform_fn != NULL)
+ (*(png_ptr->write_user_transform_fn)) /* User write transform
+ function */
+ (png_ptr, /* png_ptr */
+ &(png_ptr->row_info), /* row_info: */
+ /* png_uint_32 width; width of row */
+ /* png_size_t rowbytes; number of bytes in row */
+ /* png_byte color_type; color type of pixels */
+ /* png_byte bit_depth; bit depth of samples */
+ /* png_byte channels; number of channels (1-4) */
+ /* png_byte pixel_depth; bits per pixel (depth*channels) */
+ png_ptr->row_buf + 1); /* start of pixel data for row */
+#endif
+
+#ifdef PNG_WRITE_FILLER_SUPPORTED
+ if (png_ptr->transformations & PNG_FILLER)
+ png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ !(png_ptr->flags & PNG_FILLER_AFTER));
+#endif
+
+#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
+ if (png_ptr->transformations & PNG_PACKSWAP)
+ png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_WRITE_PACK_SUPPORTED
+ if (png_ptr->transformations & PNG_PACK)
+ png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ (png_uint_32)png_ptr->bit_depth);
+#endif
+
+#ifdef PNG_WRITE_SWAP_SUPPORTED
+ if (png_ptr->transformations & PNG_SWAP_BYTES)
+ png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_WRITE_SHIFT_SUPPORTED
+ if (png_ptr->transformations & PNG_SHIFT)
+ png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ &(png_ptr->shift));
+#endif
+
+#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
+ if (png_ptr->transformations & PNG_SWAP_ALPHA)
+ png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
+ if (png_ptr->transformations & PNG_INVERT_ALPHA)
+ png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_WRITE_BGR_SUPPORTED
+ if (png_ptr->transformations & PNG_BGR)
+ png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
+#ifdef PNG_WRITE_INVERT_SUPPORTED
+ if (png_ptr->transformations & PNG_INVERT_MONO)
+ png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+}
+
+#ifdef PNG_WRITE_PACK_SUPPORTED
+/* Pack pixels into bytes. Pass the true bit depth in bit_depth. The
+ * row_info bit depth should be 8 (one pixel per byte). The channels
+ * should be 1 (this only happens on grayscale and paletted images).
+ */
+void /* PRIVATE */
+png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
+{
+ png_debug(1, "in png_do_pack");
+
+ if (row_info->bit_depth == 8 &&
+ row_info->channels == 1)
+ {
+ switch ((int)bit_depth)
+ {
+ case 1:
+ {
+ png_bytep sp, dp;
+ int mask, v;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ sp = row;
+ dp = row;
+ mask = 0x80;
+ v = 0;
+
+ for (i = 0; i < row_width; i++)
+ {
+ if (*sp != 0)
+ v |= mask;
+
+ sp++;
+
+ if (mask > 1)
+ mask >>= 1;
+
+ else
+ {
+ mask = 0x80;
+ *dp = (png_byte)v;
+ dp++;
+ v = 0;
+ }
+ }
+
+ if (mask != 0x80)
+ *dp = (png_byte)v;
+
+ break;
+ }
+
+ case 2:
+ {
+ png_bytep sp, dp;
+ int shift, v;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ sp = row;
+ dp = row;
+ shift = 6;
+ v = 0;
+
+ for (i = 0; i < row_width; i++)
+ {
+ png_byte value;
+
+ value = (png_byte)(*sp & 0x03);
+ v |= (value << shift);
+
+ if (shift == 0)
+ {
+ shift = 6;
+ *dp = (png_byte)v;
+ dp++;
+ v = 0;
+ }
+
+ else
+ shift -= 2;
+
+ sp++;
+ }
+
+ if (shift != 6)
+ *dp = (png_byte)v;
+
+ break;
+ }
+
+ case 4:
+ {
+ png_bytep sp, dp;
+ int shift, v;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ sp = row;
+ dp = row;
+ shift = 4;
+ v = 0;
+
+ for (i = 0; i < row_width; i++)
+ {
+ png_byte value;
+
+ value = (png_byte)(*sp & 0x0f);
+ v |= (value << shift);
+
+ if (shift == 0)
+ {
+ shift = 4;
+ *dp = (png_byte)v;
+ dp++;
+ v = 0;
+ }
+
+ else
+ shift -= 4;
+
+ sp++;
+ }
+
+ if (shift != 4)
+ *dp = (png_byte)v;
+
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ row_info->bit_depth = (png_byte)bit_depth;
+ row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels);
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
+ row_info->width);
+ }
+}
+#endif
+
+#ifdef PNG_WRITE_SHIFT_SUPPORTED
+/* Shift pixel values to take advantage of whole range. Pass the
+ * true number of bits in bit_depth. The row should be packed
+ * according to row_info->bit_depth. Thus, if you had a row of
+ * bit depth 4, but the pixels only had values from 0 to 7, you
+ * would pass 3 as bit_depth, and this routine would translate the
+ * data to 0 to 15.
+ */
+void /* PRIVATE */
+png_do_shift(png_row_infop row_info, png_bytep row,
+ png_const_color_8p bit_depth)
+{
+ png_debug(1, "in png_do_shift");
+
+ if (row_info->color_type != PNG_COLOR_TYPE_PALETTE)
+ {
+ int shift_start[4], shift_dec[4];
+ int channels = 0;
+
+ if (row_info->color_type & PNG_COLOR_MASK_COLOR)
+ {
+ shift_start[channels] = row_info->bit_depth - bit_depth->red;
+ shift_dec[channels] = bit_depth->red;
+ channels++;
+
+ shift_start[channels] = row_info->bit_depth - bit_depth->green;
+ shift_dec[channels] = bit_depth->green;
+ channels++;
+
+ shift_start[channels] = row_info->bit_depth - bit_depth->blue;
+ shift_dec[channels] = bit_depth->blue;
+ channels++;
+ }
+
+ else
+ {
+ shift_start[channels] = row_info->bit_depth - bit_depth->gray;
+ shift_dec[channels] = bit_depth->gray;
+ channels++;
+ }
+
+ if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
+ {
+ shift_start[channels] = row_info->bit_depth - bit_depth->alpha;
+ shift_dec[channels] = bit_depth->alpha;
+ channels++;
+ }
+
+ /* With low row depths, could only be grayscale, so one channel */
+ if (row_info->bit_depth < 8)
+ {
+ png_bytep bp = row;
+ png_size_t i;
+ png_byte mask;
+ png_size_t row_bytes = row_info->rowbytes;
+
+ if (bit_depth->gray == 1 && row_info->bit_depth == 2)
+ mask = 0x55;
+
+ else if (row_info->bit_depth == 4 && bit_depth->gray == 3)
+ mask = 0x11;
+
+ else
+ mask = 0xff;
+
+ for (i = 0; i < row_bytes; i++, bp++)
+ {
+ png_uint_16 v;
+ int j;
+
+ v = *bp;
+ *bp = 0;
+
+ for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0])
+ {
+ if (j > 0)
+ *bp |= (png_byte)((v << j) & 0xff);
+
+ else
+ *bp |= (png_byte)((v >> (-j)) & mask);
+ }
+ }
+ }
+
+ else if (row_info->bit_depth == 8)
+ {
+ png_bytep bp = row;
+ png_uint_32 i;
+ png_uint_32 istop = channels * row_info->width;
+
+ for (i = 0; i < istop; i++, bp++)
+ {
+
+ png_uint_16 v;
+ int j;
+ int c = (int)(i%channels);
+
+ v = *bp;
+ *bp = 0;
+
+ for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
+ {
+ if (j > 0)
+ *bp |= (png_byte)((v << j) & 0xff);
+
+ else
+ *bp |= (png_byte)((v >> (-j)) & 0xff);
+ }
+ }
+ }
+
+ else
+ {
+ png_bytep bp;
+ png_uint_32 i;
+ png_uint_32 istop = channels * row_info->width;
+
+ for (bp = row, i = 0; i < istop; i++)
+ {
+ int c = (int)(i%channels);
+ png_uint_16 value, v;
+ int j;
+
+ v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1));
+ value = 0;
+
+ for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
+ {
+ if (j > 0)
+ value |= (png_uint_16)((v << j) & (png_uint_16)0xffff);
+
+ else
+ value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff);
+ }
+ *bp++ = (png_byte)(value >> 8);
+ *bp++ = (png_byte)(value & 0xff);
+ }
+ }
+ }
+}
+#endif
+
+#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
+void /* PRIVATE */
+png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_write_swap_alpha");
+
+ {
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ /* This converts from ARGB to RGBA */
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ for (i = 0, sp = dp = row; i < row_width; i++)
+ {
+ png_byte save = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = save;
+ }
+ }
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ else
+ {
+ /* This converts from AARRGGBB to RRGGBBAA */
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ for (i = 0, sp = dp = row; i < row_width; i++)
+ {
+ png_byte save[2];
+ save[0] = *(sp++);
+ save[1] = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = save[0];
+ *(dp++) = save[1];
+ }
+ }
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ /* This converts from AG to GA */
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ for (i = 0, sp = dp = row; i < row_width; i++)
+ {
+ png_byte save = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = save;
+ }
+ }
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ else
+ {
+ /* This converts from AAGG to GGAA */
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ for (i = 0, sp = dp = row; i < row_width; i++)
+ {
+ png_byte save[2];
+ save[0] = *(sp++);
+ save[1] = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = save[0];
+ *(dp++) = save[1];
+ }
+ }
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
+ }
+ }
+}
+#endif
+
+#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
+void /* PRIVATE */
+png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_write_invert_alpha");
+
+ {
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ /* This inverts the alpha channel in RGBA */
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ for (i = 0, sp = dp = row; i < row_width; i++)
+ {
+ /* Does nothing
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ */
+ sp+=3; dp = sp;
+ *(dp++) = (png_byte)(255 - *(sp++));
+ }
+ }
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ else
+ {
+ /* This inverts the alpha channel in RRGGBBAA */
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ for (i = 0, sp = dp = row; i < row_width; i++)
+ {
+ /* Does nothing
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ */
+ sp+=6; dp = sp;
+ *(dp++) = (png_byte)(255 - *(sp++));
+ *(dp++) = (png_byte)(255 - *(sp++));
+ }
+ }
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
+ }
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ /* This inverts the alpha channel in GA */
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ for (i = 0, sp = dp = row; i < row_width; i++)
+ {
+ *(dp++) = *(sp++);
+ *(dp++) = (png_byte)(255 - *(sp++));
+ }
+ }
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ else
+ {
+ /* This inverts the alpha channel in GGAA */
+ png_bytep sp, dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ for (i = 0, sp = dp = row; i < row_width; i++)
+ {
+ /* Does nothing
+ *(dp++) = *(sp++);
+ *(dp++) = *(sp++);
+ */
+ sp+=2; dp = sp;
+ *(dp++) = (png_byte)(255 - *(sp++));
+ *(dp++) = (png_byte)(255 - *(sp++));
+ }
+ }
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
+ }
+ }
+}
+#endif
+
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+/* Undoes intrapixel differencing */
+void /* PRIVATE */
+png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
+{
+ png_debug(1, "in png_do_write_intrapixel");
+
+ if ((row_info->color_type & PNG_COLOR_MASK_COLOR))
+ {
+ int bytes_per_pixel;
+ png_uint_32 row_width = row_info->width;
+ if (row_info->bit_depth == 8)
+ {
+ png_bytep rp;
+ png_uint_32 i;
+
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ bytes_per_pixel = 3;
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ bytes_per_pixel = 4;
+
+ else
+ return;
+
+ for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
+ {
+ *(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff);
+ *(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff);
+ }
+ }
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ else if (row_info->bit_depth == 16)
+ {
+ png_bytep rp;
+ png_uint_32 i;
+
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+ bytes_per_pixel = 6;
+
+ else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ bytes_per_pixel = 8;
+
+ else
+ return;
+
+ for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
+ {
+ png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1);
+ png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3);
+ png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
+ png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL);
+ png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL);
+ *(rp ) = (png_byte)((red >> 8) & 0xff);
+ *(rp + 1) = (png_byte)(red & 0xff);
+ *(rp + 4) = (png_byte)((blue >> 8) & 0xff);
+ *(rp + 5) = (png_byte)(blue & 0xff);
+ }
+ }
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
+ }
+}
+#endif /* PNG_MNG_FEATURES_SUPPORTED */
+#endif /* PNG_WRITE_SUPPORTED */
--- /dev/null
+
+/* pngwutil.c - utilities to write a PNG file
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+#include "pngpriv.h"
+
+#ifdef PNG_WRITE_SUPPORTED
+
+#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
+/* Place a 32-bit number into a buffer in PNG byte order. We work
+ * with unsigned numbers for convenience, although one supported
+ * ancillary chunk uses signed (two's complement) numbers.
+ */
+void PNGAPI
+png_save_uint_32(png_bytep buf, png_uint_32 i)
+{
+ buf[0] = (png_byte)((i >> 24) & 0xff);
+ buf[1] = (png_byte)((i >> 16) & 0xff);
+ buf[2] = (png_byte)((i >> 8) & 0xff);
+ buf[3] = (png_byte)(i & 0xff);
+}
+
+#ifdef PNG_SAVE_INT_32_SUPPORTED
+/* The png_save_int_32 function assumes integers are stored in two's
+ * complement format. If this isn't the case, then this routine needs to
+ * be modified to write data in two's complement format. Note that,
+ * the following works correctly even if png_int_32 has more than 32 bits
+ * (compare the more complex code required on read for sign extention.)
+ */
+void PNGAPI
+png_save_int_32(png_bytep buf, png_int_32 i)
+{
+ buf[0] = (png_byte)((i >> 24) & 0xff);
+ buf[1] = (png_byte)((i >> 16) & 0xff);
+ buf[2] = (png_byte)((i >> 8) & 0xff);
+ buf[3] = (png_byte)(i & 0xff);
+}
+#endif
+
+/* Place a 16-bit number into a buffer in PNG byte order.
+ * The parameter is declared unsigned int, not png_uint_16,
+ * just to avoid potential problems on pre-ANSI C compilers.
+ */
+void PNGAPI
+png_save_uint_16(png_bytep buf, unsigned int i)
+{
+ buf[0] = (png_byte)((i >> 8) & 0xff);
+ buf[1] = (png_byte)(i & 0xff);
+}
+#endif
+
+/* Simple function to write the signature. If we have already written
+ * the magic bytes of the signature, or more likely, the PNG stream is
+ * being embedded into another stream and doesn't need its own signature,
+ * we should call png_set_sig_bytes() to tell libpng how many of the
+ * bytes have already been written.
+ */
+void PNGAPI
+png_write_sig(png_structp png_ptr)
+{
+ png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ /* Inform the I/O callback that the signature is being written */
+ png_ptr->io_state = PNG_IO_WRITING | PNG_IO_SIGNATURE;
+#endif
+
+ /* Write the rest of the 8 byte signature */
+ png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
+ (png_size_t)(8 - png_ptr->sig_bytes));
+
+ if (png_ptr->sig_bytes < 3)
+ png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
+}
+
+/* Write a PNG chunk all at once. The type is an array of ASCII characters
+ * representing the chunk name. The array must be at least 4 bytes in
+ * length, and does not need to be null terminated. To be safe, pass the
+ * pre-defined chunk names here, and if you need a new one, define it
+ * where the others are defined. The length is the length of the data.
+ * All the data must be present. If that is not possible, use the
+ * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end()
+ * functions instead.
+ */
+void PNGAPI
+png_write_chunk(png_structp png_ptr, png_const_bytep chunk_name,
+ png_const_bytep data, png_size_t length)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
+ png_write_chunk_data(png_ptr, data, (png_size_t)length);
+ png_write_chunk_end(png_ptr);
+}
+
+/* Write the start of a PNG chunk. The type is the chunk type.
+ * The total_length is the sum of the lengths of all the data you will be
+ * passing in png_write_chunk_data().
+ */
+void PNGAPI
+png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name,
+ png_uint_32 length)
+{
+ png_byte buf[8];
+
+ png_debug2(0, "Writing %s chunk, length = %lu", chunk_name,
+ (unsigned long)length);
+
+ if (png_ptr == NULL)
+ return;
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ /* Inform the I/O callback that the chunk header is being written.
+ * PNG_IO_CHUNK_HDR requires a single I/O call.
+ */
+ png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_HDR;
+#endif
+
+ /* Write the length and the chunk name */
+ png_save_uint_32(buf, length);
+ png_memcpy(buf + 4, chunk_name, 4);
+ png_write_data(png_ptr, buf, (png_size_t)8);
+
+ /* Put the chunk name into png_ptr->chunk_name */
+ png_memcpy(png_ptr->chunk_name, chunk_name, 4);
+
+ /* Reset the crc and run it over the chunk name */
+ png_reset_crc(png_ptr);
+
+ png_calculate_crc(png_ptr, chunk_name, 4);
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ /* Inform the I/O callback that chunk data will (possibly) be written.
+ * PNG_IO_CHUNK_DATA does NOT require a specific number of I/O calls.
+ */
+ png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_DATA;
+#endif
+}
+
+/* Write the data of a PNG chunk started with png_write_chunk_start().
+ * Note that multiple calls to this function are allowed, and that the
+ * sum of the lengths from these calls *must* add up to the total_length
+ * given to png_write_chunk_start().
+ */
+void PNGAPI
+png_write_chunk_data(png_structp png_ptr, png_const_bytep data,
+ png_size_t length)
+{
+ /* Write the data, and run the CRC over it */
+ if (png_ptr == NULL)
+ return;
+
+ if (data != NULL && length > 0)
+ {
+ png_write_data(png_ptr, data, length);
+
+ /* Update the CRC after writing the data,
+ * in case that the user I/O routine alters it.
+ */
+ png_calculate_crc(png_ptr, data, length);
+ }
+}
+
+/* Finish a chunk started with png_write_chunk_start(). */
+void PNGAPI
+png_write_chunk_end(png_structp png_ptr)
+{
+ png_byte buf[4];
+
+ if (png_ptr == NULL) return;
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ /* Inform the I/O callback that the chunk CRC is being written.
+ * PNG_IO_CHUNK_CRC requires a single I/O function call.
+ */
+ png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_CRC;
+#endif
+
+ /* Write the crc in a single operation */
+ png_save_uint_32(buf, png_ptr->crc);
+
+ png_write_data(png_ptr, buf, (png_size_t)4);
+}
+
+#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_iCCP_SUPPORTED)
+/* This pair of functions encapsulates the operation of (a) compressing a
+ * text string, and (b) issuing it later as a series of chunk data writes.
+ * The compression_state structure is shared context for these functions
+ * set up by the caller in order to make the whole mess thread-safe.
+ */
+
+typedef struct
+{
+ png_const_bytep input; /* The uncompressed input data */
+ png_size_t input_len; /* Its length */
+ int num_output_ptr; /* Number of output pointers used */
+ int max_output_ptr; /* Size of output_ptr */
+ png_bytep *output_ptr; /* Array of pointers to output */
+} compression_state;
+
+/* Compress given text into storage in the png_ptr structure */
+static int /* PRIVATE */
+png_text_compress(png_structp png_ptr,
+ png_const_charp text, png_size_t text_len, int compression,
+ compression_state *comp)
+{
+ int ret;
+
+ comp->num_output_ptr = 0;
+ comp->max_output_ptr = 0;
+ comp->output_ptr = NULL;
+ comp->input = NULL;
+ comp->input_len = 0;
+
+ /* We may just want to pass the text right through */
+ if (compression == PNG_TEXT_COMPRESSION_NONE)
+ {
+ comp->input = (png_const_bytep)text;
+ comp->input_len = text_len;
+ return((int)text_len);
+ }
+
+ if (compression >= PNG_TEXT_COMPRESSION_LAST)
+ {
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ char msg[50];
+ png_snprintf(msg, 50, "Unknown compression type %d", compression);
+ png_warning(png_ptr, msg);
+#else
+ png_warning(png_ptr, "Unknown compression type");
+#endif
+ }
+
+ /* We can't write the chunk until we find out how much data we have,
+ * which means we need to run the compressor first and save the
+ * output. This shouldn't be a problem, as the vast majority of
+ * comments should be reasonable, but we will set up an array of
+ * malloc'd pointers to be sure.
+ *
+ * If we knew the application was well behaved, we could simplify this
+ * greatly by assuming we can always malloc an output buffer large
+ * enough to hold the compressed text ((1001 * text_len / 1000) + 12)
+ * and malloc this directly. The only time this would be a bad idea is
+ * if we can't malloc more than 64K and we have 64K of random input
+ * data, or if the input string is incredibly large (although this
+ * wouldn't cause a failure, just a slowdown due to swapping).
+ */
+
+ /* Set up the compression buffers */
+ /* TODO: the following cast hides a potential overflow problem. */
+ png_ptr->zstream.avail_in = (uInt)text_len;
+ /* NOTE: assume zlib doesn't overwrite the input */
+ png_ptr->zstream.next_in = (Bytef *)text;
+ png_ptr->zstream.avail_out = png_ptr->zbuf_size;
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+
+ /* This is the same compression loop as in png_write_row() */
+ do
+ {
+ /* Compress the data */
+ ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
+
+ if (ret != Z_OK)
+ {
+ /* Error */
+ if (png_ptr->zstream.msg != NULL)
+ png_error(png_ptr, png_ptr->zstream.msg);
+
+ else
+ png_error(png_ptr, "zlib error");
+ }
+
+ /* Check to see if we need more room */
+ if (!(png_ptr->zstream.avail_out))
+ {
+ /* Make sure the output array has room */
+ if (comp->num_output_ptr >= comp->max_output_ptr)
+ {
+ int old_max;
+
+ old_max = comp->max_output_ptr;
+ comp->max_output_ptr = comp->num_output_ptr + 4;
+ if (comp->output_ptr != NULL)
+ {
+ png_bytepp old_ptr;
+
+ old_ptr = comp->output_ptr;
+
+ comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
+ (png_alloc_size_t)
+ (comp->max_output_ptr * png_sizeof(png_charpp)));
+
+ png_memcpy(comp->output_ptr, old_ptr, old_max
+ * png_sizeof(png_charp));
+
+ png_free(png_ptr, old_ptr);
+ }
+ else
+ comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
+ (png_alloc_size_t)
+ (comp->max_output_ptr * png_sizeof(png_charp)));
+ }
+
+ /* Save the data */
+ comp->output_ptr[comp->num_output_ptr] =
+ (png_bytep)png_malloc(png_ptr,
+ (png_alloc_size_t)png_ptr->zbuf_size);
+
+ png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
+ png_ptr->zbuf_size);
+
+ comp->num_output_ptr++;
+
+ /* and reset the buffer */
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ }
+ /* Continue until we don't have any more to compress */
+ } while (png_ptr->zstream.avail_in);
+
+ /* Finish the compression */
+ do
+ {
+ /* Tell zlib we are finished */
+ ret = deflate(&png_ptr->zstream, Z_FINISH);
+
+ if (ret == Z_OK)
+ {
+ /* Check to see if we need more room */
+ if (!(png_ptr->zstream.avail_out))
+ {
+ /* Check to make sure our output array has room */
+ if (comp->num_output_ptr >= comp->max_output_ptr)
+ {
+ int old_max;
+
+ old_max = comp->max_output_ptr;
+ comp->max_output_ptr = comp->num_output_ptr + 4;
+ if (comp->output_ptr != NULL)
+ {
+ png_bytepp old_ptr;
+
+ old_ptr = comp->output_ptr;
+
+ /* This could be optimized to realloc() */
+ comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
+ (png_alloc_size_t)(comp->max_output_ptr *
+ png_sizeof(png_charp)));
+
+ png_memcpy(comp->output_ptr, old_ptr,
+ old_max * png_sizeof(png_charp));
+
+ png_free(png_ptr, old_ptr);
+ }
+
+ else
+ comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
+ (png_alloc_size_t)(comp->max_output_ptr *
+ png_sizeof(png_charp)));
+ }
+
+ /* Save the data */
+ comp->output_ptr[comp->num_output_ptr] =
+ (png_bytep)png_malloc(png_ptr,
+ (png_alloc_size_t)png_ptr->zbuf_size);
+
+ png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
+ png_ptr->zbuf_size);
+
+ comp->num_output_ptr++;
+
+ /* and reset the buffer pointers */
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ }
+ }
+ else if (ret != Z_STREAM_END)
+ {
+ /* We got an error */
+ if (png_ptr->zstream.msg != NULL)
+ png_error(png_ptr, png_ptr->zstream.msg);
+
+ else
+ png_error(png_ptr, "zlib error");
+ }
+ } while (ret != Z_STREAM_END);
+
+ /* Text length is number of buffers plus last buffer */
+ text_len = png_ptr->zbuf_size * comp->num_output_ptr;
+
+ if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
+ text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out;
+
+ return((int)text_len);
+}
+
+/* Ship the compressed text out via chunk writes */
+static void /* PRIVATE */
+png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
+{
+ int i;
+
+ /* Handle the no-compression case */
+ if (comp->input)
+ {
+ png_write_chunk_data(png_ptr, comp->input, comp->input_len);
+
+ return;
+ }
+
+ /* Write saved output buffers, if any */
+ for (i = 0; i < comp->num_output_ptr; i++)
+ {
+ png_write_chunk_data(png_ptr, comp->output_ptr[i],
+ (png_size_t)png_ptr->zbuf_size);
+
+ png_free(png_ptr, comp->output_ptr[i]);
+ }
+
+ if (comp->max_output_ptr != 0)
+ png_free(png_ptr, comp->output_ptr);
+
+ /* Write anything left in zbuf */
+ if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
+ png_write_chunk_data(png_ptr, png_ptr->zbuf,
+ (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
+
+ /* Reset zlib for another zTXt/iTXt or image data */
+ deflateReset(&png_ptr->zstream);
+ png_ptr->zstream.data_type = Z_BINARY;
+}
+#endif
+
+/* Write the IHDR chunk, and update the png_struct with the necessary
+ * information. Note that the rest of this code depends upon this
+ * information being correct.
+ */
+void /* PRIVATE */
+png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
+ int bit_depth, int color_type, int compression_type, int filter_type,
+ int interlace_type)
+{
+ PNG_IHDR;
+ int ret;
+
+ png_byte buf[13]; /* Buffer to store the IHDR info */
+
+ png_debug(1, "in png_write_IHDR");
+
+ /* Check that we have valid input data from the application info */
+ switch (color_type)
+ {
+ case PNG_COLOR_TYPE_GRAY:
+ switch (bit_depth)
+ {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ case 16:
+#endif
+ png_ptr->channels = 1; break;
+
+ default:
+ png_error(png_ptr,
+ "Invalid bit depth for grayscale image");
+ }
+ break;
+
+ case PNG_COLOR_TYPE_RGB:
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ if (bit_depth != 8 && bit_depth != 16)
+#else
+ if (bit_depth != 8)
+#endif
+ png_error(png_ptr, "Invalid bit depth for RGB image");
+
+ png_ptr->channels = 3;
+ break;
+
+ case PNG_COLOR_TYPE_PALETTE:
+ switch (bit_depth)
+ {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ png_ptr->channels = 1;
+ break;
+
+ default:
+ png_error(png_ptr, "Invalid bit depth for paletted image");
+ }
+ break;
+
+ case PNG_COLOR_TYPE_GRAY_ALPHA:
+ if (bit_depth != 8 && bit_depth != 16)
+ png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");
+
+ png_ptr->channels = 2;
+ break;
+
+ case PNG_COLOR_TYPE_RGB_ALPHA:
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ if (bit_depth != 8 && bit_depth != 16)
+#else
+ if (bit_depth != 8)
+#endif
+ png_error(png_ptr, "Invalid bit depth for RGBA image");
+
+ png_ptr->channels = 4;
+ break;
+
+ default:
+ png_error(png_ptr, "Invalid image color type specified");
+ }
+
+ if (compression_type != PNG_COMPRESSION_TYPE_BASE)
+ {
+ png_warning(png_ptr, "Invalid compression type specified");
+ compression_type = PNG_COMPRESSION_TYPE_BASE;
+ }
+
+ /* Write filter_method 64 (intrapixel differencing) only if
+ * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
+ * 2. Libpng did not write a PNG signature (this filter_method is only
+ * used in PNG datastreams that are embedded in MNG datastreams) and
+ * 3. The application called png_permit_mng_features with a mask that
+ * included PNG_FLAG_MNG_FILTER_64 and
+ * 4. The filter_method is 64 and
+ * 5. The color_type is RGB or RGBA
+ */
+ if (
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+ ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
+ (color_type == PNG_COLOR_TYPE_RGB ||
+ color_type == PNG_COLOR_TYPE_RGB_ALPHA) &&
+ (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) &&
+#endif
+ filter_type != PNG_FILTER_TYPE_BASE)
+ {
+ png_warning(png_ptr, "Invalid filter type specified");
+ filter_type = PNG_FILTER_TYPE_BASE;
+ }
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ if (interlace_type != PNG_INTERLACE_NONE &&
+ interlace_type != PNG_INTERLACE_ADAM7)
+ {
+ png_warning(png_ptr, "Invalid interlace type specified");
+ interlace_type = PNG_INTERLACE_ADAM7;
+ }
+#else
+ interlace_type=PNG_INTERLACE_NONE;
+#endif
+
+ /* Save the relevent information */
+ png_ptr->bit_depth = (png_byte)bit_depth;
+ png_ptr->color_type = (png_byte)color_type;
+ png_ptr->interlaced = (png_byte)interlace_type;
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ png_ptr->filter_type = (png_byte)filter_type;
+#endif
+ png_ptr->compression_type = (png_byte)compression_type;
+ png_ptr->width = width;
+ png_ptr->height = height;
+
+ png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels);
+ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
+ /* Set the usr info, so any transformations can modify it */
+ png_ptr->usr_width = png_ptr->width;
+ png_ptr->usr_bit_depth = png_ptr->bit_depth;
+ png_ptr->usr_channels = png_ptr->channels;
+
+ /* Pack the header information into the buffer */
+ png_save_uint_32(buf, width);
+ png_save_uint_32(buf + 4, height);
+ buf[8] = (png_byte)bit_depth;
+ buf[9] = (png_byte)color_type;
+ buf[10] = (png_byte)compression_type;
+ buf[11] = (png_byte)filter_type;
+ buf[12] = (png_byte)interlace_type;
+
+ /* Write the chunk */
+ png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
+
+ /* Initialize zlib with PNG info */
+ png_ptr->zstream.zalloc = png_zalloc;
+ png_ptr->zstream.zfree = png_zfree;
+ png_ptr->zstream.opaque = (voidpf)png_ptr;
+
+ if (!(png_ptr->do_filter))
+ {
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
+ png_ptr->bit_depth < 8)
+ png_ptr->do_filter = PNG_FILTER_NONE;
+
+ else
+ png_ptr->do_filter = PNG_ALL_FILTERS;
+ }
+
+ if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY))
+ {
+ if (png_ptr->do_filter != PNG_FILTER_NONE)
+ png_ptr->zlib_strategy = Z_FILTERED;
+
+ else
+ png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY;
+ }
+
+ if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL))
+ png_ptr->zlib_level = Z_DEFAULT_COMPRESSION;
+
+ if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL))
+ png_ptr->zlib_mem_level = 8;
+
+ if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS))
+ png_ptr->zlib_window_bits = 15;
+
+ if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD))
+ png_ptr->zlib_method = 8;
+
+ ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level,
+ png_ptr->zlib_method, png_ptr->zlib_window_bits,
+ png_ptr->zlib_mem_level, png_ptr->zlib_strategy);
+
+ if (ret != Z_OK)
+ {
+ if (ret == Z_VERSION_ERROR)
+ png_error(png_ptr,
+ "zlib failed to initialize compressor -- version error");
+
+ if (ret == Z_STREAM_ERROR)
+ png_error(png_ptr,
+ "zlib failed to initialize compressor -- stream error");
+
+ if (ret == Z_MEM_ERROR)
+ png_error(png_ptr,
+ "zlib failed to initialize compressor -- mem error");
+
+ png_error(png_ptr, "zlib failed to initialize compressor");
+ }
+
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ /* libpng is not interested in zstream.data_type, so set it
+ * to a predefined value, to avoid its evaluation inside zlib
+ */
+ png_ptr->zstream.data_type = Z_BINARY;
+
+ png_ptr->mode = PNG_HAVE_IHDR;
+}
+
+/* Write the palette. We are careful not to trust png_color to be in the
+ * correct order for PNG, so people can redefine it to any convenient
+ * structure.
+ */
+void /* PRIVATE */
+png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
+ png_uint_32 num_pal)
+{
+ PNG_PLTE;
+ png_uint_32 i;
+ png_const_colorp pal_ptr;
+ png_byte buf[3];
+
+ png_debug(1, "in png_write_PLTE");
+
+ if ((
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
+#endif
+ num_pal == 0) || num_pal > 256)
+ {
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ png_error(png_ptr, "Invalid number of colors in palette");
+ }
+
+ else
+ {
+ png_warning(png_ptr, "Invalid number of colors in palette");
+ return;
+ }
+ }
+
+ if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
+ {
+ png_warning(png_ptr,
+ "Ignoring request to write a PLTE chunk in grayscale PNG");
+
+ return;
+ }
+
+ png_ptr->num_palette = (png_uint_16)num_pal;
+ png_debug1(3, "num_palette = %d", png_ptr->num_palette);
+
+ png_write_chunk_start(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
+
+ for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++)
+ {
+ buf[0] = pal_ptr->red;
+ buf[1] = pal_ptr->green;
+ buf[2] = pal_ptr->blue;
+ png_write_chunk_data(png_ptr, buf, (png_size_t)3);
+ }
+
+#else
+ /* This is a little slower but some buggy compilers need to do this
+ * instead
+ */
+ pal_ptr=palette;
+
+ for (i = 0; i < num_pal; i++)
+ {
+ buf[0] = pal_ptr[i].red;
+ buf[1] = pal_ptr[i].green;
+ buf[2] = pal_ptr[i].blue;
+ png_write_chunk_data(png_ptr, buf, (png_size_t)3);
+ }
+
+#endif
+ png_write_chunk_end(png_ptr);
+ png_ptr->mode |= PNG_HAVE_PLTE;
+}
+
+/* Write an IDAT chunk */
+void /* PRIVATE */
+png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+ PNG_IDAT;
+
+ png_debug(1, "in png_write_IDAT");
+
+ /* Optimize the CMF field in the zlib stream. */
+ /* This hack of the zlib stream is compliant to the stream specification. */
+ if (!(png_ptr->mode & PNG_HAVE_IDAT) &&
+ png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
+ {
+ unsigned int z_cmf = data[0]; /* zlib compression method and flags */
+ if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70)
+ {
+ /* Avoid memory underflows and multiplication overflows.
+ *
+ * The conditions below are practically always satisfied;
+ * however, they still must be checked.
+ */
+ if (length >= 2 &&
+ png_ptr->height < 16384 && png_ptr->width < 16384)
+ {
+ png_uint_32 uncompressed_idat_size = png_ptr->height *
+ ((png_ptr->width *
+ png_ptr->channels * png_ptr->bit_depth + 15) >> 3);
+ unsigned int z_cinfo = z_cmf >> 4;
+ unsigned int half_z_window_size = 1 << (z_cinfo + 7);
+ while (uncompressed_idat_size <= half_z_window_size &&
+ half_z_window_size >= 256)
+ {
+ z_cinfo--;
+ half_z_window_size >>= 1;
+ }
+
+ z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4);
+
+ if (data[0] != z_cmf)
+ {
+ int tmp;
+ data[0] = (png_byte)z_cmf;
+ tmp = data[1] & 0xe0;
+ tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f;
+ data[1] = (png_byte)tmp;
+ }
+ }
+ }
+
+ else
+ png_error(png_ptr,
+ "Invalid zlib compression method or flags in IDAT");
+ }
+
+ png_write_chunk(png_ptr, png_IDAT, data, length);
+ png_ptr->mode |= PNG_HAVE_IDAT;
+}
+
+/* Write an IEND chunk */
+void /* PRIVATE */
+png_write_IEND(png_structp png_ptr)
+{
+ PNG_IEND;
+
+ png_debug(1, "in png_write_IEND");
+
+ png_write_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
+ png_ptr->mode |= PNG_HAVE_IEND;
+}
+
+#ifdef PNG_WRITE_gAMA_SUPPORTED
+/* Write a gAMA chunk */
+void /* PRIVATE */
+png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
+{
+ PNG_gAMA;
+ png_byte buf[4];
+
+ png_debug(1, "in png_write_gAMA");
+
+ /* file_gamma is saved in 1/100,000ths */
+ png_save_uint_32(buf, (png_uint_32)file_gamma);
+ png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
+}
+#endif
+
+#ifdef PNG_WRITE_sRGB_SUPPORTED
+/* Write a sRGB chunk */
+void /* PRIVATE */
+png_write_sRGB(png_structp png_ptr, int srgb_intent)
+{
+ PNG_sRGB;
+ png_byte buf[1];
+
+ png_debug(1, "in png_write_sRGB");
+
+ if (srgb_intent >= PNG_sRGB_INTENT_LAST)
+ png_warning(png_ptr,
+ "Invalid sRGB rendering intent specified");
+
+ buf[0]=(png_byte)srgb_intent;
+ png_write_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
+}
+#endif
+
+#ifdef PNG_WRITE_iCCP_SUPPORTED
+/* Write an iCCP chunk */
+void /* PRIVATE */
+png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
+ png_const_charp profile, int profile_len)
+{
+ PNG_iCCP;
+ png_size_t name_len;
+ png_charp new_name;
+ compression_state comp;
+ int embedded_profile_len = 0;
+
+ png_debug(1, "in png_write_iCCP");
+
+ comp.num_output_ptr = 0;
+ comp.max_output_ptr = 0;
+ comp.output_ptr = NULL;
+ comp.input = NULL;
+ comp.input_len = 0;
+
+ if ((name_len = png_check_keyword(png_ptr, name, &new_name)) == 0)
+ return;
+
+ if (compression_type != PNG_COMPRESSION_TYPE_BASE)
+ png_warning(png_ptr, "Unknown compression type in iCCP chunk");
+
+ if (profile == NULL)
+ profile_len = 0;
+
+ if (profile_len > 3)
+ embedded_profile_len =
+ ((*( (png_const_bytep)profile ))<<24) |
+ ((*( (png_const_bytep)profile + 1))<<16) |
+ ((*( (png_const_bytep)profile + 2))<< 8) |
+ ((*( (png_const_bytep)profile + 3)) );
+
+ if (embedded_profile_len < 0)
+ {
+ png_warning(png_ptr,
+ "Embedded profile length in iCCP chunk is negative");
+
+ png_free(png_ptr, new_name);
+ return;
+ }
+
+ if (profile_len < embedded_profile_len)
+ {
+ png_warning(png_ptr,
+ "Embedded profile length too large in iCCP chunk");
+
+ png_free(png_ptr, new_name);
+ return;
+ }
+
+ if (profile_len > embedded_profile_len)
+ {
+ png_warning(png_ptr,
+ "Truncating profile to actual length in iCCP chunk");
+
+ profile_len = embedded_profile_len;
+ }
+
+ if (profile_len)
+ profile_len = png_text_compress(png_ptr, profile,
+ (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
+
+ /* Make sure we include the NULL after the name and the compression type */
+ png_write_chunk_start(png_ptr, png_iCCP,
+ (png_uint_32)(name_len + profile_len + 2));
+
+ new_name[name_len + 1] = 0x00;
+
+ png_write_chunk_data(png_ptr, (png_bytep)new_name,
+ (png_size_t)(name_len + 2));
+
+ if (profile_len)
+ png_write_compressed_data_out(png_ptr, &comp);
+
+ png_write_chunk_end(png_ptr);
+ png_free(png_ptr, new_name);
+}
+#endif
+
+#ifdef PNG_WRITE_sPLT_SUPPORTED
+/* Write a sPLT chunk */
+void /* PRIVATE */
+png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
+{
+ PNG_sPLT;
+ png_size_t name_len;
+ png_charp new_name;
+ png_byte entrybuf[10];
+ png_size_t entry_size = (spalette->depth == 8 ? 6 : 10);
+ png_size_t palette_size = entry_size * spalette->nentries;
+ png_sPLT_entryp ep;
+#ifndef PNG_POINTER_INDEXING_SUPPORTED
+ int i;
+#endif
+
+ png_debug(1, "in png_write_sPLT");
+
+ if ((name_len = png_check_keyword(png_ptr,spalette->name, &new_name))==0)
+ return;
+
+ /* Make sure we include the NULL after the name */
+ png_write_chunk_start(png_ptr, png_sPLT,
+ (png_uint_32)(name_len + 2 + palette_size));
+
+ png_write_chunk_data(png_ptr, (png_bytep)new_name,
+ (png_size_t)(name_len + 1));
+
+ png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1);
+
+ /* Loop through each palette entry, writing appropriately */
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
+ for (ep = spalette->entries; ep<spalette->entries + spalette->nentries; ep++)
+ {
+ if (spalette->depth == 8)
+ {
+ entrybuf[0] = (png_byte)ep->red;
+ entrybuf[1] = (png_byte)ep->green;
+ entrybuf[2] = (png_byte)ep->blue;
+ entrybuf[3] = (png_byte)ep->alpha;
+ png_save_uint_16(entrybuf + 4, ep->frequency);
+ }
+
+ else
+ {
+ png_save_uint_16(entrybuf + 0, ep->red);
+ png_save_uint_16(entrybuf + 2, ep->green);
+ png_save_uint_16(entrybuf + 4, ep->blue);
+ png_save_uint_16(entrybuf + 6, ep->alpha);
+ png_save_uint_16(entrybuf + 8, ep->frequency);
+ }
+
+ png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
+ }
+#else
+ ep=spalette->entries;
+ for (i = 0; i>spalette->nentries; i++)
+ {
+ if (spalette->depth == 8)
+ {
+ entrybuf[0] = (png_byte)ep[i].red;
+ entrybuf[1] = (png_byte)ep[i].green;
+ entrybuf[2] = (png_byte)ep[i].blue;
+ entrybuf[3] = (png_byte)ep[i].alpha;
+ png_save_uint_16(entrybuf + 4, ep[i].frequency);
+ }
+
+ else
+ {
+ png_save_uint_16(entrybuf + 0, ep[i].red);
+ png_save_uint_16(entrybuf + 2, ep[i].green);
+ png_save_uint_16(entrybuf + 4, ep[i].blue);
+ png_save_uint_16(entrybuf + 6, ep[i].alpha);
+ png_save_uint_16(entrybuf + 8, ep[i].frequency);
+ }
+
+ png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
+ }
+#endif
+
+ png_write_chunk_end(png_ptr);
+ png_free(png_ptr, new_name);
+}
+#endif
+
+#ifdef PNG_WRITE_sBIT_SUPPORTED
+/* Write the sBIT chunk */
+void /* PRIVATE */
+png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type)
+{
+ PNG_sBIT;
+ png_byte buf[4];
+ png_size_t size;
+
+ png_debug(1, "in png_write_sBIT");
+
+ /* Make sure we don't depend upon the order of PNG_COLOR_8 */
+ if (color_type & PNG_COLOR_MASK_COLOR)
+ {
+ png_byte maxbits;
+
+ maxbits = (png_byte)(color_type==PNG_COLOR_TYPE_PALETTE ? 8 :
+ png_ptr->usr_bit_depth);
+
+ if (sbit->red == 0 || sbit->red > maxbits ||
+ sbit->green == 0 || sbit->green > maxbits ||
+ sbit->blue == 0 || sbit->blue > maxbits)
+ {
+ png_warning(png_ptr, "Invalid sBIT depth specified");
+ return;
+ }
+
+ buf[0] = sbit->red;
+ buf[1] = sbit->green;
+ buf[2] = sbit->blue;
+ size = 3;
+ }
+
+ else
+ {
+ if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth)
+ {
+ png_warning(png_ptr, "Invalid sBIT depth specified");
+ return;
+ }
+
+ buf[0] = sbit->gray;
+ size = 1;
+ }
+
+ if (color_type & PNG_COLOR_MASK_ALPHA)
+ {
+ if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth)
+ {
+ png_warning(png_ptr, "Invalid sBIT depth specified");
+ return;
+ }
+
+ buf[size++] = sbit->alpha;
+ }
+
+ png_write_chunk(png_ptr, png_sBIT, buf, size);
+}
+#endif
+
+#ifdef PNG_WRITE_cHRM_SUPPORTED
+/* Write the cHRM chunk */
+void /* PRIVATE */
+png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
+ png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y,
+ png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x,
+ png_fixed_point blue_y)
+{
+ PNG_cHRM;
+ png_byte buf[32];
+
+ png_debug(1, "in png_write_cHRM");
+
+ /* Each value is saved in 1/100,000ths */
+#ifdef PNG_CHECK_cHRM_SUPPORTED
+ if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y,
+ green_x, green_y, blue_x, blue_y))
+#endif
+ {
+ png_save_uint_32(buf, (png_uint_32)white_x);
+ png_save_uint_32(buf + 4, (png_uint_32)white_y);
+
+ png_save_uint_32(buf + 8, (png_uint_32)red_x);
+ png_save_uint_32(buf + 12, (png_uint_32)red_y);
+
+ png_save_uint_32(buf + 16, (png_uint_32)green_x);
+ png_save_uint_32(buf + 20, (png_uint_32)green_y);
+
+ png_save_uint_32(buf + 24, (png_uint_32)blue_x);
+ png_save_uint_32(buf + 28, (png_uint_32)blue_y);
+
+ png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
+ }
+}
+#endif
+
+#ifdef PNG_WRITE_tRNS_SUPPORTED
+/* Write the tRNS chunk */
+void /* PRIVATE */
+png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
+ png_const_color_16p tran, int num_trans, int color_type)
+{
+ PNG_tRNS;
+ png_byte buf[6];
+
+ png_debug(1, "in png_write_tRNS");
+
+ if (color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette)
+ {
+ png_warning(png_ptr, "Invalid number of transparent colors specified");
+ return;
+ }
+
+ /* Write the chunk out as it is */
+ png_write_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans);
+ }
+
+ else if (color_type == PNG_COLOR_TYPE_GRAY)
+ {
+ /* One 16 bit value */
+ if (tran->gray >= (1 << png_ptr->bit_depth))
+ {
+ png_warning(png_ptr,
+ "Ignoring attempt to write tRNS chunk out-of-range for bit_depth");
+
+ return;
+ }
+
+ png_save_uint_16(buf, tran->gray);
+ png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
+ }
+
+ else if (color_type == PNG_COLOR_TYPE_RGB)
+ {
+ /* Three 16 bit values */
+ png_save_uint_16(buf, tran->red);
+ png_save_uint_16(buf + 2, tran->green);
+ png_save_uint_16(buf + 4, tran->blue);
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
+#else
+ if (buf[0] | buf[2] | buf[4])
+#endif
+ {
+ png_warning(png_ptr,
+ "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8");
+ return;
+ }
+
+ png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
+ }
+
+ else
+ {
+ png_warning(png_ptr, "Can't write tRNS with an alpha channel");
+ }
+}
+#endif
+
+#ifdef PNG_WRITE_bKGD_SUPPORTED
+/* Write the background chunk */
+void /* PRIVATE */
+png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
+{
+ PNG_bKGD;
+ png_byte buf[6];
+
+ png_debug(1, "in png_write_bKGD");
+
+ if (color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ (png_ptr->num_palette ||
+ (!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) &&
+#endif
+ back->index >= png_ptr->num_palette)
+ {
+ png_warning(png_ptr, "Invalid background palette index");
+ return;
+ }
+
+ buf[0] = back->index;
+ png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
+ }
+
+ else if (color_type & PNG_COLOR_MASK_COLOR)
+ {
+ png_save_uint_16(buf, back->red);
+ png_save_uint_16(buf + 2, back->green);
+ png_save_uint_16(buf + 4, back->blue);
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
+#else
+ if (buf[0] | buf[2] | buf[4])
+#endif
+ {
+ png_warning(png_ptr,
+ "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8");
+
+ return;
+ }
+
+ png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
+ }
+
+ else
+ {
+ if (back->gray >= (1 << png_ptr->bit_depth))
+ {
+ png_warning(png_ptr,
+ "Ignoring attempt to write bKGD chunk out-of-range for bit_depth");
+
+ return;
+ }
+
+ png_save_uint_16(buf, back->gray);
+ png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
+ }
+}
+#endif
+
+#ifdef PNG_WRITE_hIST_SUPPORTED
+/* Write the histogram */
+void /* PRIVATE */
+png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
+{
+ PNG_hIST;
+ int i;
+ png_byte buf[3];
+
+ png_debug(1, "in png_write_hIST");
+
+ if (num_hist > (int)png_ptr->num_palette)
+ {
+ png_debug2(3, "num_hist = %d, num_palette = %d", num_hist,
+ png_ptr->num_palette);
+
+ png_warning(png_ptr, "Invalid number of histogram entries specified");
+ return;
+ }
+
+ png_write_chunk_start(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
+
+ for (i = 0; i < num_hist; i++)
+ {
+ png_save_uint_16(buf, hist[i]);
+ png_write_chunk_data(png_ptr, buf, (png_size_t)2);
+ }
+
+ png_write_chunk_end(png_ptr);
+}
+#endif
+
+#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
+ defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
+/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
+ * and if invalid, correct the keyword rather than discarding the entire
+ * chunk. The PNG 1.0 specification requires keywords 1-79 characters in
+ * length, forbids leading or trailing whitespace, multiple internal spaces,
+ * and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
+ *
+ * The new_key is allocated to hold the corrected keyword and must be freed
+ * by the calling routine. This avoids problems with trying to write to
+ * static keywords without having to have duplicate copies of the strings.
+ */
+png_size_t /* PRIVATE */
+png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key)
+{
+ png_size_t key_len;
+ png_const_charp ikp;
+ png_charp kp, dp;
+ int kflag;
+ int kwarn=0;
+
+ png_debug(1, "in png_check_keyword");
+
+ *new_key = NULL;
+
+ if (key == NULL || (key_len = png_strlen(key)) == 0)
+ {
+ png_warning(png_ptr, "zero length keyword");
+ return ((png_size_t)0);
+ }
+
+ png_debug1(2, "Keyword to be checked is '%s'", key);
+
+ *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
+
+ if (*new_key == NULL)
+ {
+ png_warning(png_ptr, "Out of memory while procesing keyword");
+ return ((png_size_t)0);
+ }
+
+ /* Replace non-printing characters with a blank and print a warning */
+ for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++)
+ {
+ if ((png_byte)*ikp < 0x20 ||
+ ((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1))
+ {
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ char msg[40];
+
+ png_snprintf(msg, 40,
+ "invalid keyword character 0x%02X", (png_byte)*ikp);
+ png_warning(png_ptr, msg);
+#else
+ png_warning(png_ptr, "invalid character in keyword");
+#endif
+ *dp = ' ';
+ }
+
+ else
+ {
+ *dp = *ikp;
+ }
+ }
+ *dp = '\0';
+
+ /* Remove any trailing white space. */
+ kp = *new_key + key_len - 1;
+ if (*kp == ' ')
+ {
+ png_warning(png_ptr, "trailing spaces removed from keyword");
+
+ while (*kp == ' ')
+ {
+ *(kp--) = '\0';
+ key_len--;
+ }
+ }
+
+ /* Remove any leading white space. */
+ kp = *new_key;
+ if (*kp == ' ')
+ {
+ png_warning(png_ptr, "leading spaces removed from keyword");
+
+ while (*kp == ' ')
+ {
+ kp++;
+ key_len--;
+ }
+ }
+
+ png_debug1(2, "Checking for multiple internal spaces in '%s'", kp);
+
+ /* Remove multiple internal spaces. */
+ for (kflag = 0, dp = *new_key; *kp != '\0'; kp++)
+ {
+ if (*kp == ' ' && kflag == 0)
+ {
+ *(dp++) = *kp;
+ kflag = 1;
+ }
+
+ else if (*kp == ' ')
+ {
+ key_len--;
+ kwarn = 1;
+ }
+
+ else
+ {
+ *(dp++) = *kp;
+ kflag = 0;
+ }
+ }
+ *dp = '\0';
+ if (kwarn)
+ png_warning(png_ptr, "extra interior spaces removed from keyword");
+
+ if (key_len == 0)
+ {
+ png_free(png_ptr, *new_key);
+ png_warning(png_ptr, "Zero length keyword");
+ }
+
+ if (key_len > 79)
+ {
+ png_warning(png_ptr, "keyword length must be 1 - 79 characters");
+ (*new_key)[79] = '\0';
+ key_len = 79;
+ }
+
+ return (key_len);
+}
+#endif
+
+#ifdef PNG_WRITE_tEXt_SUPPORTED
+/* Write a tEXt chunk */
+void /* PRIVATE */
+png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
+ png_size_t text_len)
+{
+ PNG_tEXt;
+ png_size_t key_len;
+ png_charp new_key;
+
+ png_debug(1, "in png_write_tEXt");
+
+ if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
+ return;
+
+ if (text == NULL || *text == '\0')
+ text_len = 0;
+
+ else
+ text_len = png_strlen(text);
+
+ /* Make sure we include the 0 after the key */
+ png_write_chunk_start(png_ptr, png_tEXt,
+ (png_uint_32)(key_len + text_len + 1));
+ /*
+ * We leave it to the application to meet PNG-1.0 requirements on the
+ * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of
+ * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
+ * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
+ */
+ png_write_chunk_data(png_ptr, (png_bytep)new_key,
+ (png_size_t)(key_len + 1));
+
+ if (text_len)
+ png_write_chunk_data(png_ptr, (png_const_bytep)text,
+ (png_size_t)text_len);
+
+ png_write_chunk_end(png_ptr);
+ png_free(png_ptr, new_key);
+}
+#endif
+
+#ifdef PNG_WRITE_zTXt_SUPPORTED
+/* Write a compressed text chunk */
+void /* PRIVATE */
+png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
+ png_size_t text_len, int compression)
+{
+ PNG_zTXt;
+ png_size_t key_len;
+ png_byte buf;
+ png_charp new_key;
+ compression_state comp;
+
+ png_debug(1, "in png_write_zTXt");
+
+ comp.num_output_ptr = 0;
+ comp.max_output_ptr = 0;
+ comp.output_ptr = NULL;
+ comp.input = NULL;
+ comp.input_len = 0;
+
+ if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0)
+ {
+ png_free(png_ptr, new_key);
+ return;
+ }
+
+ if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE)
+ {
+ png_write_tEXt(png_ptr, new_key, text, (png_size_t)0);
+ png_free(png_ptr, new_key);
+ return;
+ }
+
+ text_len = png_strlen(text);
+
+ /* Compute the compressed data; do it now for the length */
+ text_len = png_text_compress(png_ptr, text, text_len, compression,
+ &comp);
+
+ /* Write start of chunk */
+ png_write_chunk_start(png_ptr, png_zTXt,
+ (png_uint_32)(key_len+text_len + 2));
+
+ /* Write key */
+ png_write_chunk_data(png_ptr, (png_bytep)new_key,
+ (png_size_t)(key_len + 1));
+
+ png_free(png_ptr, new_key);
+
+ buf = (png_byte)compression;
+
+ /* Write compression */
+ png_write_chunk_data(png_ptr, &buf, (png_size_t)1);
+
+ /* Write the compressed data */
+ png_write_compressed_data_out(png_ptr, &comp);
+
+ /* Close the chunk */
+ png_write_chunk_end(png_ptr);
+}
+#endif
+
+#ifdef PNG_WRITE_iTXt_SUPPORTED
+/* Write an iTXt chunk */
+void /* PRIVATE */
+png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
+ png_const_charp lang, png_const_charp lang_key, png_const_charp text)
+{
+ PNG_iTXt;
+ png_size_t lang_len, key_len, lang_key_len, text_len;
+ png_charp new_lang;
+ png_charp new_key = NULL;
+ png_byte cbuf[2];
+ compression_state comp;
+
+ png_debug(1, "in png_write_iTXt");
+
+ comp.num_output_ptr = 0;
+ comp.max_output_ptr = 0;
+ comp.output_ptr = NULL;
+ comp.input = NULL;
+
+ if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0)
+ return;
+
+ if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang)) == 0)
+ {
+ png_warning(png_ptr, "Empty language field in iTXt chunk");
+ new_lang = NULL;
+ lang_len = 0;
+ }
+
+ if (lang_key == NULL)
+ lang_key_len = 0;
+
+ else
+ lang_key_len = png_strlen(lang_key);
+
+ if (text == NULL)
+ text_len = 0;
+
+ else
+ text_len = png_strlen(text);
+
+ /* Compute the compressed data; do it now for the length */
+ text_len = png_text_compress(png_ptr, text, text_len, compression - 2,
+ &comp);
+
+
+ /* Make sure we include the compression flag, the compression byte,
+ * and the NULs after the key, lang, and lang_key parts
+ */
+
+ png_write_chunk_start(png_ptr, png_iTXt, (png_uint_32)(
+ 5 /* comp byte, comp flag, terminators for key, lang and lang_key */
+ + key_len
+ + lang_len
+ + lang_key_len
+ + text_len));
+
+ /* We leave it to the application to meet PNG-1.0 requirements on the
+ * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of
+ * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
+ * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
+ */
+ png_write_chunk_data(png_ptr, (png_bytep)new_key, (png_size_t)(key_len + 1));
+
+ /* Set the compression flag */
+ if (compression == PNG_ITXT_COMPRESSION_NONE ||
+ compression == PNG_TEXT_COMPRESSION_NONE)
+ cbuf[0] = 0;
+
+ else /* compression == PNG_ITXT_COMPRESSION_zTXt */
+ cbuf[0] = 1;
+
+ /* Set the compression method */
+ cbuf[1] = 0;
+
+ png_write_chunk_data(png_ptr, cbuf, (png_size_t)2);
+
+ cbuf[0] = 0;
+ png_write_chunk_data(png_ptr, (new_lang ? (png_const_bytep)new_lang : cbuf),
+ (png_size_t)(lang_len + 1));
+
+ png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf),
+ (png_size_t)(lang_key_len + 1));
+
+ png_write_compressed_data_out(png_ptr, &comp);
+
+ png_write_chunk_end(png_ptr);
+
+ png_free(png_ptr, new_key);
+ png_free(png_ptr, new_lang);
+}
+#endif
+
+#ifdef PNG_WRITE_oFFs_SUPPORTED
+/* Write the oFFs chunk */
+void /* PRIVATE */
+png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
+ int unit_type)
+{
+ PNG_oFFs;
+ png_byte buf[9];
+
+ png_debug(1, "in png_write_oFFs");
+
+ if (unit_type >= PNG_OFFSET_LAST)
+ png_warning(png_ptr, "Unrecognized unit type for oFFs chunk");
+
+ png_save_int_32(buf, x_offset);
+ png_save_int_32(buf + 4, y_offset);
+ buf[8] = (png_byte)unit_type;
+
+ png_write_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
+}
+#endif
+#ifdef PNG_WRITE_pCAL_SUPPORTED
+/* Write the pCAL chunk (described in the PNG extensions document) */
+void /* PRIVATE */
+png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
+ png_int_32 X1, int type, int nparams, png_const_charp units,
+ png_charpp params)
+{
+ PNG_pCAL;
+ png_size_t purpose_len, units_len, total_len;
+ png_uint_32p params_len;
+ png_byte buf[10];
+ png_charp new_purpose;
+ int i;
+
+ png_debug1(1, "in png_write_pCAL (%d parameters)", nparams);
+
+ if (type >= PNG_EQUATION_LAST)
+ png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
+
+ purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1;
+ png_debug1(3, "pCAL purpose length = %d", (int)purpose_len);
+ units_len = png_strlen(units) + (nparams == 0 ? 0 : 1);
+ png_debug1(3, "pCAL units length = %d", (int)units_len);
+ total_len = purpose_len + units_len + 10;
+
+ params_len = (png_uint_32p)png_malloc(png_ptr,
+ (png_alloc_size_t)(nparams * png_sizeof(png_uint_32)));
+
+ /* Find the length of each parameter, making sure we don't count the
+ * null terminator for the last parameter.
+ */
+ for (i = 0; i < nparams; i++)
+ {
+ params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1);
+ png_debug2(3, "pCAL parameter %d length = %lu", i,
+ (unsigned long)params_len[i]);
+ total_len += (png_size_t)params_len[i];
+ }
+
+ png_debug1(3, "pCAL total length = %d", (int)total_len);
+ png_write_chunk_start(png_ptr, png_pCAL, (png_uint_32)total_len);
+ png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose,
+ (png_size_t)purpose_len);
+ png_save_int_32(buf, X0);
+ png_save_int_32(buf + 4, X1);
+ buf[8] = (png_byte)type;
+ buf[9] = (png_byte)nparams;
+ png_write_chunk_data(png_ptr, buf, (png_size_t)10);
+ png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len);
+
+ png_free(png_ptr, new_purpose);
+
+ for (i = 0; i < nparams; i++)
+ {
+ png_write_chunk_data(png_ptr, (png_const_bytep)params[i],
+ (png_size_t)params_len[i]);
+ }
+
+ png_free(png_ptr, params_len);
+ png_write_chunk_end(png_ptr);
+}
+#endif
+
+#ifdef PNG_WRITE_sCAL_SUPPORTED
+/* Write the sCAL chunk */
+void /* PRIVATE */
+png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width,
+ png_const_charp height)
+{
+ PNG_sCAL;
+ png_byte buf[64];
+ png_size_t wlen, hlen, total_len;
+
+ png_debug(1, "in png_write_sCAL_s");
+
+ wlen = png_strlen(width);
+ hlen = png_strlen(height);
+ total_len = wlen + hlen + 2;
+
+ if (total_len > 64)
+ {
+ png_warning(png_ptr, "Can't write sCAL (buffer too small)");
+ return;
+ }
+
+ buf[0] = (png_byte)unit;
+ png_memcpy(buf + 1, width, wlen + 1); /* Append the '\0' here */
+ png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */
+
+ png_debug1(3, "sCAL total length = %u", (unsigned int)total_len);
+ png_write_chunk(png_ptr, png_sCAL, buf, total_len);
+}
+#endif
+
+#ifdef PNG_WRITE_pHYs_SUPPORTED
+/* Write the pHYs chunk */
+void /* PRIVATE */
+png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
+ png_uint_32 y_pixels_per_unit,
+ int unit_type)
+{
+ PNG_pHYs;
+ png_byte buf[9];
+
+ png_debug(1, "in png_write_pHYs");
+
+ if (unit_type >= PNG_RESOLUTION_LAST)
+ png_warning(png_ptr, "Unrecognized unit type for pHYs chunk");
+
+ png_save_uint_32(buf, x_pixels_per_unit);
+ png_save_uint_32(buf + 4, y_pixels_per_unit);
+ buf[8] = (png_byte)unit_type;
+
+ png_write_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
+}
+#endif
+
+#ifdef PNG_WRITE_tIME_SUPPORTED
+/* Write the tIME chunk. Use either png_convert_from_struct_tm()
+ * or png_convert_from_time_t(), or fill in the structure yourself.
+ */
+void /* PRIVATE */
+png_write_tIME(png_structp png_ptr, png_const_timep mod_time)
+{
+ PNG_tIME;
+ png_byte buf[7];
+
+ png_debug(1, "in png_write_tIME");
+
+ if (mod_time->month > 12 || mod_time->month < 1 ||
+ mod_time->day > 31 || mod_time->day < 1 ||
+ mod_time->hour > 23 || mod_time->second > 60)
+ {
+ png_warning(png_ptr, "Invalid time specified for tIME chunk");
+ return;
+ }
+
+ png_save_uint_16(buf, mod_time->year);
+ buf[2] = mod_time->month;
+ buf[3] = mod_time->day;
+ buf[4] = mod_time->hour;
+ buf[5] = mod_time->minute;
+ buf[6] = mod_time->second;
+
+ png_write_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
+}
+#endif
+
+/* Initializes the row writing capability of libpng */
+void /* PRIVATE */
+png_write_start_row(png_structp png_ptr)
+{
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* Start of interlace block */
+ int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* Offset to next interlace block */
+ int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* Start of interlace block in the y direction */
+ int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* Offset to next interlace block in the y direction */
+ int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+#endif
+
+ png_size_t buf_size;
+
+ png_debug(1, "in png_write_start_row");
+
+ buf_size = (png_size_t)(PNG_ROWBYTES(
+ png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
+
+ /* Set up row buffer */
+ png_ptr->row_buf = (png_bytep)png_malloc(png_ptr,
+ (png_alloc_size_t)buf_size);
+
+ png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
+
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ /* Set up filtering buffer, if using this filter */
+ if (png_ptr->do_filter & PNG_FILTER_SUB)
+ {
+ png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1);
+
+ png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
+ }
+
+ /* We only need to keep the previous row if we are using one of these. */
+ if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
+ {
+ /* Set up previous row buffer */
+ png_ptr->prev_row = (png_bytep)png_calloc(png_ptr,
+ (png_alloc_size_t)buf_size);
+
+ if (png_ptr->do_filter & PNG_FILTER_UP)
+ {
+ png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
+ png_ptr->rowbytes + 1);
+
+ png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
+ }
+
+ if (png_ptr->do_filter & PNG_FILTER_AVG)
+ {
+ png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
+ png_ptr->rowbytes + 1);
+
+ png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
+ }
+
+ if (png_ptr->do_filter & PNG_FILTER_PAETH)
+ {
+ png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
+ png_ptr->rowbytes + 1);
+
+ png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
+ }
+ }
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ /* If interlaced, we need to set up width and height of pass */
+ if (png_ptr->interlaced)
+ {
+ if (!(png_ptr->transformations & PNG_INTERLACE))
+ {
+ png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
+ png_pass_ystart[0]) / png_pass_yinc[0];
+
+ png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 -
+ png_pass_start[0]) / png_pass_inc[0];
+ }
+
+ else
+ {
+ png_ptr->num_rows = png_ptr->height;
+ png_ptr->usr_width = png_ptr->width;
+ }
+ }
+
+ else
+#endif
+ {
+ png_ptr->num_rows = png_ptr->height;
+ png_ptr->usr_width = png_ptr->width;
+ }
+
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+}
+
+/* Internal use only. Called when finished processing a row of data. */
+void /* PRIVATE */
+png_write_finish_row(png_structp png_ptr)
+{
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* Start of interlace block */
+ int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* Offset to next interlace block */
+ int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* Start of interlace block in the y direction */
+ int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* Offset to next interlace block in the y direction */
+ int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+#endif
+
+ int ret;
+
+ png_debug(1, "in png_write_finish_row");
+
+ /* Next row */
+ png_ptr->row_number++;
+
+ /* See if we are done */
+ if (png_ptr->row_number < png_ptr->num_rows)
+ return;
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+ /* If interlaced, go to next pass */
+ if (png_ptr->interlaced)
+ {
+ png_ptr->row_number = 0;
+ if (png_ptr->transformations & PNG_INTERLACE)
+ {
+ png_ptr->pass++;
+ }
+
+ else
+ {
+ /* Loop until we find a non-zero width or height pass */
+ do
+ {
+ png_ptr->pass++;
+
+ if (png_ptr->pass >= 7)
+ break;
+
+ png_ptr->usr_width = (png_ptr->width +
+ png_pass_inc[png_ptr->pass] - 1 -
+ png_pass_start[png_ptr->pass]) /
+ png_pass_inc[png_ptr->pass];
+
+ png_ptr->num_rows = (png_ptr->height +
+ png_pass_yinc[png_ptr->pass] - 1 -
+ png_pass_ystart[png_ptr->pass]) /
+ png_pass_yinc[png_ptr->pass];
+
+ if (png_ptr->transformations & PNG_INTERLACE)
+ break;
+
+ } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0);
+
+ }
+
+ /* Reset the row above the image for the next pass */
+ if (png_ptr->pass < 7)
+ {
+ if (png_ptr->prev_row != NULL)
+ png_memset(png_ptr->prev_row, 0,
+ (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels*
+ png_ptr->usr_bit_depth, png_ptr->width)) + 1);
+
+ return;
+ }
+ }
+#endif
+
+ /* If we get here, we've just written the last row, so we need
+ to flush the compressor */
+ do
+ {
+ /* Tell the compressor we are done */
+ ret = deflate(&png_ptr->zstream, Z_FINISH);
+
+ /* Check for an error */
+ if (ret == Z_OK)
+ {
+ /* Check to see if we need more room */
+ if (!(png_ptr->zstream.avail_out))
+ {
+ png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ }
+ }
+
+ else if (ret != Z_STREAM_END)
+ {
+ if (png_ptr->zstream.msg != NULL)
+ png_error(png_ptr, png_ptr->zstream.msg);
+
+ else
+ png_error(png_ptr, "zlib error");
+ }
+ } while (ret != Z_STREAM_END);
+
+ /* Write any extra space */
+ if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
+ {
+ png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size -
+ png_ptr->zstream.avail_out);
+ }
+
+ deflateReset(&png_ptr->zstream);
+ png_ptr->zstream.data_type = Z_BINARY;
+}
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
+/* Pick out the correct pixels for the interlace pass.
+ * The basic idea here is to go through the row with a source
+ * pointer and a destination pointer (sp and dp), and copy the
+ * correct pixels for the pass. As the row gets compacted,
+ * sp will always be >= dp, so we should never overwrite anything.
+ * See the default: case for the easiest code to understand.
+ */
+void /* PRIVATE */
+png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
+{
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* Start of interlace block */
+ int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* Offset to next interlace block */
+ int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ png_debug(1, "in png_do_write_interlace");
+
+ /* We don't have to do anything on the last pass (6) */
+ if (pass < 6)
+ {
+ /* Each pixel depth is handled separately */
+ switch (row_info->pixel_depth)
+ {
+ case 1:
+ {
+ png_bytep sp;
+ png_bytep dp;
+ int shift;
+ int d;
+ int value;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ dp = row;
+ d = 0;
+ shift = 7;
+
+ for (i = png_pass_start[pass]; i < row_width;
+ i += png_pass_inc[pass])
+ {
+ sp = row + (png_size_t)(i >> 3);
+ value = (int)(*sp >> (7 - (int)(i & 0x07))) & 0x01;
+ d |= (value << shift);
+
+ if (shift == 0)
+ {
+ shift = 7;
+ *dp++ = (png_byte)d;
+ d = 0;
+ }
+
+ else
+ shift--;
+
+ }
+ if (shift != 7)
+ *dp = (png_byte)d;
+
+ break;
+ }
+
+ case 2:
+ {
+ png_bytep sp;
+ png_bytep dp;
+ int shift;
+ int d;
+ int value;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ dp = row;
+ shift = 6;
+ d = 0;
+
+ for (i = png_pass_start[pass]; i < row_width;
+ i += png_pass_inc[pass])
+ {
+ sp = row + (png_size_t)(i >> 2);
+ value = (*sp >> ((3 - (int)(i & 0x03)) << 1)) & 0x03;
+ d |= (value << shift);
+
+ if (shift == 0)
+ {
+ shift = 6;
+ *dp++ = (png_byte)d;
+ d = 0;
+ }
+
+ else
+ shift -= 2;
+ }
+ if (shift != 6)
+ *dp = (png_byte)d;
+
+ break;
+ }
+
+ case 4:
+ {
+ png_bytep sp;
+ png_bytep dp;
+ int shift;
+ int d;
+ int value;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+
+ dp = row;
+ shift = 4;
+ d = 0;
+ for (i = png_pass_start[pass]; i < row_width;
+ i += png_pass_inc[pass])
+ {
+ sp = row + (png_size_t)(i >> 1);
+ value = (*sp >> ((1 - (int)(i & 0x01)) << 2)) & 0x0f;
+ d |= (value << shift);
+
+ if (shift == 0)
+ {
+ shift = 4;
+ *dp++ = (png_byte)d;
+ d = 0;
+ }
+
+ else
+ shift -= 4;
+ }
+ if (shift != 4)
+ *dp = (png_byte)d;
+
+ break;
+ }
+
+ default:
+ {
+ png_bytep sp;
+ png_bytep dp;
+ png_uint_32 i;
+ png_uint_32 row_width = row_info->width;
+ png_size_t pixel_bytes;
+
+ /* Start at the beginning */
+ dp = row;
+
+ /* Find out how many bytes each pixel takes up */
+ pixel_bytes = (row_info->pixel_depth >> 3);
+
+ /* Loop through the row, only looking at the pixels that matter */
+ for (i = png_pass_start[pass]; i < row_width;
+ i += png_pass_inc[pass])
+ {
+ /* Find out where the original pixel is */
+ sp = row + (png_size_t)i * pixel_bytes;
+
+ /* Move the pixel */
+ if (dp != sp)
+ png_memcpy(dp, sp, pixel_bytes);
+
+ /* Next pixel */
+ dp += pixel_bytes;
+ }
+ break;
+ }
+ }
+ /* Set new row width */
+ row_info->width = (row_info->width +
+ png_pass_inc[pass] - 1 -
+ png_pass_start[pass]) /
+ png_pass_inc[pass];
+
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
+ row_info->width);
+ }
+}
+#endif
+
+/* This filters the row, chooses which filter to use, if it has not already
+ * been specified by the application, and then writes the row out with the
+ * chosen filter.
+ */
+#define PNG_MAXSUM (((png_uint_32)(-1)) >> 1)
+#define PNG_HISHIFT 10
+#define PNG_LOMASK ((png_uint_32)0xffffL)
+#define PNG_HIMASK ((png_uint_32)(~PNG_LOMASK >> PNG_HISHIFT))
+void /* PRIVATE */
+png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
+{
+ png_bytep best_row;
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ png_bytep prev_row, row_buf;
+ png_uint_32 mins, bpp;
+ png_byte filter_to_do = png_ptr->do_filter;
+ png_size_t row_bytes = row_info->rowbytes;
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ int num_p_filters = (int)png_ptr->num_prev_filters;
+#endif
+
+ png_debug(1, "in png_write_find_filter");
+
+#ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS)
+ {
+ /* These will never be selected so we need not test them. */
+ filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH);
+ }
+#endif
+
+ /* Find out how many bytes offset each pixel is */
+ bpp = (row_info->pixel_depth + 7) >> 3;
+
+ prev_row = png_ptr->prev_row;
+#endif
+ best_row = png_ptr->row_buf;
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ row_buf = best_row;
+ mins = PNG_MAXSUM;
+
+ /* The prediction method we use is to find which method provides the
+ * smallest value when summing the absolute values of the distances
+ * from zero, using anything >= 128 as negative numbers. This is known
+ * as the "minimum sum of absolute differences" heuristic. Other
+ * heuristics are the "weighted minimum sum of absolute differences"
+ * (experimental and can in theory improve compression), and the "zlib
+ * predictive" method (not implemented yet), which does test compressions
+ * of lines using different filter methods, and then chooses the
+ * (series of) filter(s) that give minimum compressed data size (VERY
+ * computationally expensive).
+ *
+ * GRR 980525: consider also
+ *
+ * (1) minimum sum of absolute differences from running average (i.e.,
+ * keep running sum of non-absolute differences & count of bytes)
+ * [track dispersion, too? restart average if dispersion too large?]
+ *
+ * (1b) minimum sum of absolute differences from sliding average, probably
+ * with window size <= deflate window (usually 32K)
+ *
+ * (2) minimum sum of squared differences from zero or running average
+ * (i.e., ~ root-mean-square approach)
+ */
+
+
+ /* We don't need to test the 'no filter' case if this is the only filter
+ * that has been chosen, as it doesn't actually do anything to the data.
+ */
+ if ((filter_to_do & PNG_FILTER_NONE) && filter_to_do != PNG_FILTER_NONE)
+ {
+ png_bytep rp;
+ png_uint_32 sum = 0;
+ png_size_t i;
+ int v;
+
+ for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++)
+ {
+ v = *rp;
+ sum += (v < 128) ? v : 256 - v;
+ }
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ png_uint_32 sumhi, sumlo;
+ int j;
+ sumlo = sum & PNG_LOMASK;
+ sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; /* Gives us some footroom */
+
+ /* Reduce the sum if we match any of the previous rows */
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
+ {
+ sumlo = (sumlo * png_ptr->filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ sumhi = (sumhi * png_ptr->filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ /* Factor in the cost of this filter (this is here for completeness,
+ * but it makes no sense to have a "cost" for the NONE filter, as
+ * it has the minimum possible computational cost - none).
+ */
+ sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
+ PNG_COST_SHIFT;
+
+ sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
+ PNG_COST_SHIFT;
+
+ if (sumhi > PNG_HIMASK)
+ sum = PNG_MAXSUM;
+
+ else
+ sum = (sumhi << PNG_HISHIFT) + sumlo;
+ }
+#endif
+ mins = sum;
+ }
+
+ /* Sub filter */
+ if (filter_to_do == PNG_FILTER_SUB)
+ /* It's the only filter so no testing is needed */
+ {
+ png_bytep rp, lp, dp;
+ png_size_t i;
+
+ for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
+ i++, rp++, dp++)
+ {
+ *dp = *rp;
+ }
+
+ for (lp = row_buf + 1; i < row_bytes;
+ i++, rp++, lp++, dp++)
+ {
+ *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff);
+ }
+
+ best_row = png_ptr->sub_row;
+ }
+
+ else if (filter_to_do & PNG_FILTER_SUB)
+ {
+ png_bytep rp, dp, lp;
+ png_uint_32 sum = 0, lmins = mins;
+ png_size_t i;
+ int v;
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ /* We temporarily increase the "minimum sum" by the factor we
+ * would reduce the sum of this filter, so that we can do the
+ * early exit comparison without scaling the sum each time.
+ */
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int j;
+ png_uint_32 lmhi, lmlo;
+ lmlo = lmins & PNG_LOMASK;
+ lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
+
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
+ {
+ lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
+ PNG_COST_SHIFT;
+
+ lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
+ PNG_COST_SHIFT;
+
+ if (lmhi > PNG_HIMASK)
+ lmins = PNG_MAXSUM;
+
+ else
+ lmins = (lmhi << PNG_HISHIFT) + lmlo;
+ }
+#endif
+
+ for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
+ i++, rp++, dp++)
+ {
+ v = *dp = *rp;
+
+ sum += (v < 128) ? v : 256 - v;
+ }
+
+ for (lp = row_buf + 1; i < row_bytes;
+ i++, rp++, lp++, dp++)
+ {
+ v = *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff);
+
+ sum += (v < 128) ? v : 256 - v;
+
+ if (sum > lmins) /* We are already worse, don't continue. */
+ break;
+ }
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int j;
+ png_uint_32 sumhi, sumlo;
+ sumlo = sum & PNG_LOMASK;
+ sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
+
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
+ {
+ sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
+ PNG_COST_SHIFT;
+
+ sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
+ PNG_COST_SHIFT;
+
+ if (sumhi > PNG_HIMASK)
+ sum = PNG_MAXSUM;
+
+ else
+ sum = (sumhi << PNG_HISHIFT) + sumlo;
+ }
+#endif
+
+ if (sum < mins)
+ {
+ mins = sum;
+ best_row = png_ptr->sub_row;
+ }
+ }
+
+ /* Up filter */
+ if (filter_to_do == PNG_FILTER_UP)
+ {
+ png_bytep rp, dp, pp;
+ png_size_t i;
+
+ for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
+ pp = prev_row + 1; i < row_bytes;
+ i++, rp++, pp++, dp++)
+ {
+ *dp = (png_byte)(((int)*rp - (int)*pp) & 0xff);
+ }
+
+ best_row = png_ptr->up_row;
+ }
+
+ else if (filter_to_do & PNG_FILTER_UP)
+ {
+ png_bytep rp, dp, pp;
+ png_uint_32 sum = 0, lmins = mins;
+ png_size_t i;
+ int v;
+
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int j;
+ png_uint_32 lmhi, lmlo;
+ lmlo = lmins & PNG_LOMASK;
+ lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
+
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
+ {
+ lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
+ PNG_COST_SHIFT;
+
+ lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
+ PNG_COST_SHIFT;
+
+ if (lmhi > PNG_HIMASK)
+ lmins = PNG_MAXSUM;
+
+ else
+ lmins = (lmhi << PNG_HISHIFT) + lmlo;
+ }
+#endif
+
+ for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
+ pp = prev_row + 1; i < row_bytes; i++)
+ {
+ v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
+
+ sum += (v < 128) ? v : 256 - v;
+
+ if (sum > lmins) /* We are already worse, don't continue. */
+ break;
+ }
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int j;
+ png_uint_32 sumhi, sumlo;
+ sumlo = sum & PNG_LOMASK;
+ sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
+
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
+ {
+ sumlo = (sumlo * png_ptr->filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ sumhi = (sumhi * png_ptr->filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
+ PNG_COST_SHIFT;
+
+ sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
+ PNG_COST_SHIFT;
+
+ if (sumhi > PNG_HIMASK)
+ sum = PNG_MAXSUM;
+
+ else
+ sum = (sumhi << PNG_HISHIFT) + sumlo;
+ }
+#endif
+
+ if (sum < mins)
+ {
+ mins = sum;
+ best_row = png_ptr->up_row;
+ }
+ }
+
+ /* Avg filter */
+ if (filter_to_do == PNG_FILTER_AVG)
+ {
+ png_bytep rp, dp, pp, lp;
+ png_uint_32 i;
+
+ for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
+ pp = prev_row + 1; i < bpp; i++)
+ {
+ *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff);
+ }
+
+ for (lp = row_buf + 1; i < row_bytes; i++)
+ {
+ *dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2))
+ & 0xff);
+ }
+ best_row = png_ptr->avg_row;
+ }
+
+ else if (filter_to_do & PNG_FILTER_AVG)
+ {
+ png_bytep rp, dp, pp, lp;
+ png_uint_32 sum = 0, lmins = mins;
+ png_size_t i;
+ int v;
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int j;
+ png_uint_32 lmhi, lmlo;
+ lmlo = lmins & PNG_LOMASK;
+ lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
+
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG)
+ {
+ lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
+ PNG_COST_SHIFT;
+
+ lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
+ PNG_COST_SHIFT;
+
+ if (lmhi > PNG_HIMASK)
+ lmins = PNG_MAXSUM;
+
+ else
+ lmins = (lmhi << PNG_HISHIFT) + lmlo;
+ }
+#endif
+
+ for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
+ pp = prev_row + 1; i < bpp; i++)
+ {
+ v = *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff);
+
+ sum += (v < 128) ? v : 256 - v;
+ }
+
+ for (lp = row_buf + 1; i < row_bytes; i++)
+ {
+ v = *dp++ =
+ (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff);
+
+ sum += (v < 128) ? v : 256 - v;
+
+ if (sum > lmins) /* We are already worse, don't continue. */
+ break;
+ }
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int j;
+ png_uint_32 sumhi, sumlo;
+ sumlo = sum & PNG_LOMASK;
+ sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
+
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
+ {
+ sumlo = (sumlo * png_ptr->filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ sumhi = (sumhi * png_ptr->filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
+ PNG_COST_SHIFT;
+
+ sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
+ PNG_COST_SHIFT;
+
+ if (sumhi > PNG_HIMASK)
+ sum = PNG_MAXSUM;
+
+ else
+ sum = (sumhi << PNG_HISHIFT) + sumlo;
+ }
+#endif
+
+ if (sum < mins)
+ {
+ mins = sum;
+ best_row = png_ptr->avg_row;
+ }
+ }
+
+ /* Paeth filter */
+ if (filter_to_do == PNG_FILTER_PAETH)
+ {
+ png_bytep rp, dp, pp, cp, lp;
+ png_size_t i;
+
+ for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
+ pp = prev_row + 1; i < bpp; i++)
+ {
+ *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
+ }
+
+ for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++)
+ {
+ int a, b, c, pa, pb, pc, p;
+
+ b = *pp++;
+ c = *cp++;
+ a = *lp++;
+
+ p = b - c;
+ pc = a - c;
+
+#ifdef PNG_USE_ABS
+ pa = abs(p);
+ pb = abs(pc);
+ pc = abs(p + pc);
+#else
+ pa = p < 0 ? -p : p;
+ pb = pc < 0 ? -pc : pc;
+ pc = (p + pc) < 0 ? -(p + pc) : p + pc;
+#endif
+
+ p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c;
+
+ *dp++ = (png_byte)(((int)*rp++ - p) & 0xff);
+ }
+ best_row = png_ptr->paeth_row;
+ }
+
+ else if (filter_to_do & PNG_FILTER_PAETH)
+ {
+ png_bytep rp, dp, pp, cp, lp;
+ png_uint_32 sum = 0, lmins = mins;
+ png_size_t i;
+ int v;
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int j;
+ png_uint_32 lmhi, lmlo;
+ lmlo = lmins & PNG_LOMASK;
+ lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
+
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
+ {
+ lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
+ PNG_COST_SHIFT;
+
+ lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
+ PNG_COST_SHIFT;
+
+ if (lmhi > PNG_HIMASK)
+ lmins = PNG_MAXSUM;
+
+ else
+ lmins = (lmhi << PNG_HISHIFT) + lmlo;
+ }
+#endif
+
+ for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
+ pp = prev_row + 1; i < bpp; i++)
+ {
+ v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
+
+ sum += (v < 128) ? v : 256 - v;
+ }
+
+ for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++)
+ {
+ int a, b, c, pa, pb, pc, p;
+
+ b = *pp++;
+ c = *cp++;
+ a = *lp++;
+
+#ifndef PNG_SLOW_PAETH
+ p = b - c;
+ pc = a - c;
+#ifdef PNG_USE_ABS
+ pa = abs(p);
+ pb = abs(pc);
+ pc = abs(p + pc);
+#else
+ pa = p < 0 ? -p : p;
+ pb = pc < 0 ? -pc : pc;
+ pc = (p + pc) < 0 ? -(p + pc) : p + pc;
+#endif
+ p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c;
+#else /* PNG_SLOW_PAETH */
+ p = a + b - c;
+ pa = abs(p - a);
+ pb = abs(p - b);
+ pc = abs(p - c);
+
+ if (pa <= pb && pa <= pc)
+ p = a;
+
+ else if (pb <= pc)
+ p = b;
+
+ else
+ p = c;
+#endif /* PNG_SLOW_PAETH */
+
+ v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff);
+
+ sum += (v < 128) ? v : 256 - v;
+
+ if (sum > lmins) /* We are already worse, don't continue. */
+ break;
+ }
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int j;
+ png_uint_32 sumhi, sumlo;
+ sumlo = sum & PNG_LOMASK;
+ sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
+
+ for (j = 0; j < num_p_filters; j++)
+ {
+ if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
+ {
+ sumlo = (sumlo * png_ptr->filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+
+ sumhi = (sumhi * png_ptr->filter_weights[j]) >>
+ PNG_WEIGHT_SHIFT;
+ }
+ }
+
+ sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
+ PNG_COST_SHIFT;
+
+ sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
+ PNG_COST_SHIFT;
+
+ if (sumhi > PNG_HIMASK)
+ sum = PNG_MAXSUM;
+
+ else
+ sum = (sumhi << PNG_HISHIFT) + sumlo;
+ }
+#endif
+
+ if (sum < mins)
+ {
+ best_row = png_ptr->paeth_row;
+ }
+ }
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
+ /* Do the actual writing of the filtered row data from the chosen filter. */
+
+ png_write_filtered_row(png_ptr, best_row);
+
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ /* Save the type of filter we picked this time for future calculations */
+ if (png_ptr->num_prev_filters > 0)
+ {
+ int j;
+
+ for (j = 1; j < num_p_filters; j++)
+ {
+ png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1];
+ }
+
+ png_ptr->prev_filters[j] = best_row[0];
+ }
+#endif
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
+}
+
+
+/* Do the actual writing of a previously filtered row. */
+void /* PRIVATE */
+png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
+{
+ png_size_t avail;
+
+ png_debug(1, "in png_write_filtered_row");
+
+ png_debug1(2, "filter = %d", filtered_row[0]);
+ /* Set up the zlib input buffer */
+
+ png_ptr->zstream.next_in = filtered_row;
+ png_ptr->zstream.avail_in = 0;
+ avail = png_ptr->row_info.rowbytes + 1;
+ /* Repeat until we have compressed all the data */
+ do
+ {
+ int ret; /* Return of zlib */
+
+ /* Record the number of bytes available - zlib supports at least 65535
+ * bytes at one step, depending on the size of the zlib type 'uInt', the
+ * maximum size zlib can write at once is ZLIB_IO_MAX (from pngpriv.h).
+ * Use this because on 16 bit systems 'rowbytes' can be up to 65536 (i.e.
+ * one more than 16 bits) and, in this case 'rowbytes+1' can overflow a
+ * uInt. ZLIB_IO_MAX can be safely reduced to cause zlib to be called
+ * with smaller chunks of data.
+ */
+ if (png_ptr->zstream.avail_in == 0)
+ {
+ if (avail > ZLIB_IO_MAX)
+ {
+ png_ptr->zstream.avail_in = ZLIB_IO_MAX;
+ avail -= ZLIB_IO_MAX;
+ }
+
+ else
+ {
+ /* So this will fit in the available uInt space: */
+ png_ptr->zstream.avail_in = (uInt)avail;
+ avail = 0;
+ }
+ }
+
+ /* Compress the data */
+ ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
+
+ /* Check for compression errors */
+ if (ret != Z_OK)
+ {
+ if (png_ptr->zstream.msg != NULL)
+ png_error(png_ptr, png_ptr->zstream.msg);
+
+ else
+ png_error(png_ptr, "zlib error");
+ }
+
+ /* See if it is time to write another IDAT */
+ if (!(png_ptr->zstream.avail_out))
+ {
+ /* Write the IDAT and reset the zlib output buffer */
+ png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ }
+ /* Repeat until all data has been compressed */
+ } while (avail > 0 || png_ptr->zstream.avail_in > 0);
+
+ /* Swap the current and previous rows */
+ if (png_ptr->prev_row != NULL)
+ {
+ png_bytep tptr;
+
+ tptr = png_ptr->prev_row;
+ png_ptr->prev_row = png_ptr->row_buf;
+ png_ptr->row_buf = tptr;
+ }
+
+ /* Finish row - updates counters and flushes zlib if last row */
+ png_write_finish_row(png_ptr);
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+ png_ptr->flush_rows++;
+
+ if (png_ptr->flush_dist > 0 &&
+ png_ptr->flush_rows >= png_ptr->flush_dist)
+ {
+ png_write_flush(png_ptr);
+ }
+#endif
+}
+#endif /* PNG_WRITE_SUPPORTED */
--- /dev/null
+// ISO C9x compliant inttypes.h for Microsoft Visual Studio
+// Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124
+//
+// Copyright (c) 2006 Alexander Chemeris
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// 3. The name of the author may be used to endorse or promote products
+// derived from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _MSC_VER // [
+#error "Use this header only with Microsoft Visual C++ compilers!"
+#endif // _MSC_VER ]
+
+#ifndef _MSC_INTTYPES_H_ // [
+#define _MSC_INTTYPES_H_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif
+
+#include "stdint.h"
+
+// 7.8 Format conversion of integer types
+
+typedef struct {
+ intmax_t quot;
+ intmax_t rem;
+} imaxdiv_t;
+
+// 7.8.1 Macros for format specifiers
+
+#if !defined(__cplusplus) || defined(__STDC_FORMAT_MACROS) // [ See footnote 185 at page 198
+
+// The fprintf macros for signed integers are:
+#define PRId8 "d"
+#define PRIi8 "i"
+#define PRIdLEAST8 "d"
+#define PRIiLEAST8 "i"
+#define PRIdFAST8 "d"
+#define PRIiFAST8 "i"
+
+#define PRId16 "hd"
+#define PRIi16 "hi"
+#define PRIdLEAST16 "hd"
+#define PRIiLEAST16 "hi"
+#define PRIdFAST16 "hd"
+#define PRIiFAST16 "hi"
+
+#define PRId32 "I32d"
+#define PRIi32 "I32i"
+#define PRIdLEAST32 "I32d"
+#define PRIiLEAST32 "I32i"
+#define PRIdFAST32 "I32d"
+#define PRIiFAST32 "I32i"
+
+#define PRId64 "I64d"
+#define PRIi64 "I64i"
+#define PRIdLEAST64 "I64d"
+#define PRIiLEAST64 "I64i"
+#define PRIdFAST64 "I64d"
+#define PRIiFAST64 "I64i"
+
+#define PRIdMAX "I64d"
+#define PRIiMAX "I64i"
+
+#define PRIdPTR "Id"
+#define PRIiPTR "Ii"
+
+// The fprintf macros for unsigned integers are:
+#define PRIo8 "o"
+#define PRIu8 "u"
+#define PRIx8 "x"
+#define PRIX8 "X"
+#define PRIoLEAST8 "o"
+#define PRIuLEAST8 "u"
+#define PRIxLEAST8 "x"
+#define PRIXLEAST8 "X"
+#define PRIoFAST8 "o"
+#define PRIuFAST8 "u"
+#define PRIxFAST8 "x"
+#define PRIXFAST8 "X"
+
+#define PRIo16 "ho"
+#define PRIu16 "hu"
+#define PRIx16 "hx"
+#define PRIX16 "hX"
+#define PRIoLEAST16 "ho"
+#define PRIuLEAST16 "hu"
+#define PRIxLEAST16 "hx"
+#define PRIXLEAST16 "hX"
+#define PRIoFAST16 "ho"
+#define PRIuFAST16 "hu"
+#define PRIxFAST16 "hx"
+#define PRIXFAST16 "hX"
+
+#define PRIo32 "I32o"
+#define PRIu32 "I32u"
+#define PRIx32 "I32x"
+#define PRIX32 "I32X"
+#define PRIoLEAST32 "I32o"
+#define PRIuLEAST32 "I32u"
+#define PRIxLEAST32 "I32x"
+#define PRIXLEAST32 "I32X"
+#define PRIoFAST32 "I32o"
+#define PRIuFAST32 "I32u"
+#define PRIxFAST32 "I32x"
+#define PRIXFAST32 "I32X"
+
+#define PRIo64 "I64o"
+#define PRIu64 "I64u"
+#define PRIx64 "I64x"
+#define PRIX64 "I64X"
+#define PRIoLEAST64 "I64o"
+#define PRIuLEAST64 "I64u"
+#define PRIxLEAST64 "I64x"
+#define PRIXLEAST64 "I64X"
+#define PRIoFAST64 "I64o"
+#define PRIuFAST64 "I64u"
+#define PRIxFAST64 "I64x"
+#define PRIXFAST64 "I64X"
+
+#define PRIoMAX "I64o"
+#define PRIuMAX "I64u"
+#define PRIxMAX "I64x"
+#define PRIXMAX "I64X"
+
+#define PRIoPTR "Io"
+#define PRIuPTR "Iu"
+#define PRIxPTR "Ix"
+#define PRIXPTR "IX"
+
+// The fscanf macros for signed integers are:
+#define SCNd8 "d"
+#define SCNi8 "i"
+#define SCNdLEAST8 "d"
+#define SCNiLEAST8 "i"
+#define SCNdFAST8 "d"
+#define SCNiFAST8 "i"
+
+#define SCNd16 "hd"
+#define SCNi16 "hi"
+#define SCNdLEAST16 "hd"
+#define SCNiLEAST16 "hi"
+#define SCNdFAST16 "hd"
+#define SCNiFAST16 "hi"
+
+#define SCNd32 "ld"
+#define SCNi32 "li"
+#define SCNdLEAST32 "ld"
+#define SCNiLEAST32 "li"
+#define SCNdFAST32 "ld"
+#define SCNiFAST32 "li"
+
+#define SCNd64 "I64d"
+#define SCNi64 "I64i"
+#define SCNdLEAST64 "I64d"
+#define SCNiLEAST64 "I64i"
+#define SCNdFAST64 "I64d"
+#define SCNiFAST64 "I64i"
+
+#define SCNdMAX "I64d"
+#define SCNiMAX "I64i"
+
+#ifdef _WIN64 // [
+# define SCNdPTR "I64d"
+# define SCNiPTR "I64i"
+#else // _WIN64 ][
+# define SCNdPTR "ld"
+# define SCNiPTR "li"
+#endif // _WIN64 ]
+
+// The fscanf macros for unsigned integers are:
+#define SCNo8 "o"
+#define SCNu8 "u"
+#define SCNx8 "x"
+#define SCNX8 "X"
+#define SCNoLEAST8 "o"
+#define SCNuLEAST8 "u"
+#define SCNxLEAST8 "x"
+#define SCNXLEAST8 "X"
+#define SCNoFAST8 "o"
+#define SCNuFAST8 "u"
+#define SCNxFAST8 "x"
+#define SCNXFAST8 "X"
+
+#define SCNo16 "ho"
+#define SCNu16 "hu"
+#define SCNx16 "hx"
+#define SCNX16 "hX"
+#define SCNoLEAST16 "ho"
+#define SCNuLEAST16 "hu"
+#define SCNxLEAST16 "hx"
+#define SCNXLEAST16 "hX"
+#define SCNoFAST16 "ho"
+#define SCNuFAST16 "hu"
+#define SCNxFAST16 "hx"
+#define SCNXFAST16 "hX"
+
+#define SCNo32 "lo"
+#define SCNu32 "lu"
+#define SCNx32 "lx"
+#define SCNX32 "lX"
+#define SCNoLEAST32 "lo"
+#define SCNuLEAST32 "lu"
+#define SCNxLEAST32 "lx"
+#define SCNXLEAST32 "lX"
+#define SCNoFAST32 "lo"
+#define SCNuFAST32 "lu"
+#define SCNxFAST32 "lx"
+#define SCNXFAST32 "lX"
+
+#define SCNo64 "I64o"
+#define SCNu64 "I64u"
+#define SCNx64 "I64x"
+#define SCNX64 "I64X"
+#define SCNoLEAST64 "I64o"
+#define SCNuLEAST64 "I64u"
+#define SCNxLEAST64 "I64x"
+#define SCNXLEAST64 "I64X"
+#define SCNoFAST64 "I64o"
+#define SCNuFAST64 "I64u"
+#define SCNxFAST64 "I64x"
+#define SCNXFAST64 "I64X"
+
+#define SCNoMAX "I64o"
+#define SCNuMAX "I64u"
+#define SCNxMAX "I64x"
+#define SCNXMAX "I64X"
+
+#ifdef _WIN64 // [
+# define SCNoPTR "I64o"
+# define SCNuPTR "I64u"
+# define SCNxPTR "I64x"
+# define SCNXPTR "I64X"
+#else // _WIN64 ][
+# define SCNoPTR "lo"
+# define SCNuPTR "lu"
+# define SCNxPTR "lx"
+# define SCNXPTR "lX"
+#endif // _WIN64 ]
+
+#endif // __STDC_FORMAT_MACROS ]
+
+// 7.8.2 Functions for greatest-width integer types
+
+// 7.8.2.1 The imaxabs function
+#define imaxabs _abs64
+
+// 7.8.2.2 The imaxdiv function
+
+// This is modified version of div() function from Microsoft's div.c found
+// in %MSVC.NET%\crt\src\div.c
+#ifdef STATIC_IMAXDIV // [
+static
+#else // STATIC_IMAXDIV ][
+_inline
+#endif // STATIC_IMAXDIV ]
+imaxdiv_t __cdecl imaxdiv(intmax_t numer, intmax_t denom)
+{
+ imaxdiv_t result;
+
+ result.quot = numer / denom;
+ result.rem = numer % denom;
+
+ if (numer < 0 && result.rem > 0) {
+ // did division wrong; must fix up
+ ++result.quot;
+ result.rem -= denom;
+ }
+
+ return result;
+}
+
+// 7.8.2.3 The strtoimax and strtoumax functions
+#define strtoimax _strtoi64
+#define strtoumax _strtoui64
+
+// 7.8.2.4 The wcstoimax and wcstoumax functions
+#define wcstoimax _wcstoi64
+#define wcstoumax _wcstoui64
+
+
+#endif // _MSC_INTTYPES_H_ ]
--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2007-2010 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ **************************************************************************/
+
+#ifndef _STDBOOL_H_
+#define _STDBOOL_H_
+
+#ifndef __cplusplus
+
+#define false 0
+#define true 1
+#define bool _Bool
+
+/* For compilers that don't have the builtin _Bool type. */
+#if defined(_MSC_VER) || (__STDC_VERSION__ < 199901L && __GNUC__ < 3)
+typedef unsigned char _Bool;
+#endif
+
+#endif /* !__cplusplus */
+
+#define __bool_true_false_are_defined 1
+
+#endif /* !_STDBOOL_H_ */
--- /dev/null
+// ISO C9x compliant stdint.h for Microsoft Visual Studio
+// Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124
+//
+// Copyright (c) 2006-2008 Alexander Chemeris
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// 3. The name of the author may be used to endorse or promote products
+// derived from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _MSC_VER // [
+#error "Use this header only with Microsoft Visual C++ compilers!"
+#endif // _MSC_VER ]
+
+#ifndef _MSC_STDINT_H_ // [
+#define _MSC_STDINT_H_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif
+
+#include <limits.h>
+
+// For Visual Studio 6 in C++ mode and for many Visual Studio versions when
+// compiling for ARM we should wrap <wchar.h> include with 'extern "C++" {}'
+// or compiler give many errors like this:
+// error C2733: second C linkage of overloaded function 'wmemchr' not allowed
+#ifdef __cplusplus
+extern "C" {
+#endif
+# include <wchar.h>
+#ifdef __cplusplus
+}
+#endif
+
+// Define _W64 macros to mark types changing their size, like intptr_t.
+#ifndef _W64
+# if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300
+# define _W64 __w64
+# else
+# define _W64
+# endif
+#endif
+
+
+// 7.18.1 Integer types
+
+// 7.18.1.1 Exact-width integer types
+
+// Visual Studio 6 and Embedded Visual C++ 4 doesn't
+// realize that, e.g. char has the same size as __int8
+// so we give up on __intX for them.
+#if (_MSC_VER < 1300)
+ typedef signed char int8_t;
+ typedef signed short int16_t;
+ typedef signed int int32_t;
+ typedef unsigned char uint8_t;
+ typedef unsigned short uint16_t;
+ typedef unsigned int uint32_t;
+#else
+ typedef signed __int8 int8_t;
+ typedef signed __int16 int16_t;
+ typedef signed __int32 int32_t;
+ typedef unsigned __int8 uint8_t;
+ typedef unsigned __int16 uint16_t;
+ typedef unsigned __int32 uint32_t;
+#endif
+typedef signed __int64 int64_t;
+typedef unsigned __int64 uint64_t;
+
+
+// 7.18.1.2 Minimum-width integer types
+typedef int8_t int_least8_t;
+typedef int16_t int_least16_t;
+typedef int32_t int_least32_t;
+typedef int64_t int_least64_t;
+typedef uint8_t uint_least8_t;
+typedef uint16_t uint_least16_t;
+typedef uint32_t uint_least32_t;
+typedef uint64_t uint_least64_t;
+
+// 7.18.1.3 Fastest minimum-width integer types
+typedef int8_t int_fast8_t;
+typedef int16_t int_fast16_t;
+typedef int32_t int_fast32_t;
+typedef int64_t int_fast64_t;
+typedef uint8_t uint_fast8_t;
+typedef uint16_t uint_fast16_t;
+typedef uint32_t uint_fast32_t;
+typedef uint64_t uint_fast64_t;
+
+// 7.18.1.4 Integer types capable of holding object pointers
+#ifdef _WIN64 // [
+ typedef signed __int64 intptr_t;
+ typedef unsigned __int64 uintptr_t;
+#else // _WIN64 ][
+ typedef _W64 signed int intptr_t;
+ typedef _W64 unsigned int uintptr_t;
+#endif // _WIN64 ]
+
+// 7.18.1.5 Greatest-width integer types
+typedef int64_t intmax_t;
+typedef uint64_t uintmax_t;
+
+
+// 7.18.2 Limits of specified-width integer types
+
+#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) // [ See footnote 220 at page 257 and footnote 221 at page 259
+
+// 7.18.2.1 Limits of exact-width integer types
+#define INT8_MIN ((int8_t)_I8_MIN)
+#define INT8_MAX _I8_MAX
+#define INT16_MIN ((int16_t)_I16_MIN)
+#define INT16_MAX _I16_MAX
+#define INT32_MIN ((int32_t)_I32_MIN)
+#define INT32_MAX _I32_MAX
+#define INT64_MIN ((int64_t)_I64_MIN)
+#define INT64_MAX _I64_MAX
+#define UINT8_MAX _UI8_MAX
+#define UINT16_MAX _UI16_MAX
+#define UINT32_MAX _UI32_MAX
+#define UINT64_MAX _UI64_MAX
+
+// 7.18.2.2 Limits of minimum-width integer types
+#define INT_LEAST8_MIN INT8_MIN
+#define INT_LEAST8_MAX INT8_MAX
+#define INT_LEAST16_MIN INT16_MIN
+#define INT_LEAST16_MAX INT16_MAX
+#define INT_LEAST32_MIN INT32_MIN
+#define INT_LEAST32_MAX INT32_MAX
+#define INT_LEAST64_MIN INT64_MIN
+#define INT_LEAST64_MAX INT64_MAX
+#define UINT_LEAST8_MAX UINT8_MAX
+#define UINT_LEAST16_MAX UINT16_MAX
+#define UINT_LEAST32_MAX UINT32_MAX
+#define UINT_LEAST64_MAX UINT64_MAX
+
+// 7.18.2.3 Limits of fastest minimum-width integer types
+#define INT_FAST8_MIN INT8_MIN
+#define INT_FAST8_MAX INT8_MAX
+#define INT_FAST16_MIN INT16_MIN
+#define INT_FAST16_MAX INT16_MAX
+#define INT_FAST32_MIN INT32_MIN
+#define INT_FAST32_MAX INT32_MAX
+#define INT_FAST64_MIN INT64_MIN
+#define INT_FAST64_MAX INT64_MAX
+#define UINT_FAST8_MAX UINT8_MAX
+#define UINT_FAST16_MAX UINT16_MAX
+#define UINT_FAST32_MAX UINT32_MAX
+#define UINT_FAST64_MAX UINT64_MAX
+
+// 7.18.2.4 Limits of integer types capable of holding object pointers
+#ifdef _WIN64 // [
+# define INTPTR_MIN INT64_MIN
+# define INTPTR_MAX INT64_MAX
+# define UINTPTR_MAX UINT64_MAX
+#else // _WIN64 ][
+# define INTPTR_MIN INT32_MIN
+# define INTPTR_MAX INT32_MAX
+# define UINTPTR_MAX UINT32_MAX
+#endif // _WIN64 ]
+
+// 7.18.2.5 Limits of greatest-width integer types
+#define INTMAX_MIN INT64_MIN
+#define INTMAX_MAX INT64_MAX
+#define UINTMAX_MAX UINT64_MAX
+
+// 7.18.3 Limits of other integer types
+
+#ifdef _WIN64 // [
+# define PTRDIFF_MIN _I64_MIN
+# define PTRDIFF_MAX _I64_MAX
+#else // _WIN64 ][
+# define PTRDIFF_MIN _I32_MIN
+# define PTRDIFF_MAX _I32_MAX
+#endif // _WIN64 ]
+
+#define SIG_ATOMIC_MIN INT_MIN
+#define SIG_ATOMIC_MAX INT_MAX
+
+#ifndef SIZE_MAX // [
+# ifdef _WIN64 // [
+# define SIZE_MAX _UI64_MAX
+# else // _WIN64 ][
+# define SIZE_MAX _UI32_MAX
+# endif // _WIN64 ]
+#endif // SIZE_MAX ]
+
+// WCHAR_MIN and WCHAR_MAX are also defined in <wchar.h>
+#ifndef WCHAR_MIN // [
+# define WCHAR_MIN 0
+#endif // WCHAR_MIN ]
+#ifndef WCHAR_MAX // [
+# define WCHAR_MAX _UI16_MAX
+#endif // WCHAR_MAX ]
+
+#define WINT_MIN 0
+#define WINT_MAX _UI16_MAX
+
+#endif // __STDC_LIMIT_MACROS ]
+
+
+// 7.18.4 Limits of other integer types
+
+#if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS) // [ See footnote 224 at page 260
+
+// 7.18.4.1 Macros for minimum-width integer constants
+
+#define INT8_C(val) val##i8
+#define INT16_C(val) val##i16
+#define INT32_C(val) val##i32
+#define INT64_C(val) val##i64
+
+#define UINT8_C(val) val##ui8
+#define UINT16_C(val) val##ui16
+#define UINT32_C(val) val##ui32
+#define UINT64_C(val) val##ui64
+
+// 7.18.4.2 Macros for greatest-width integer constants
+#define INTMAX_C INT64_C
+#define UINTMAX_C UINT64_C
+
+#endif // __STDC_CONSTANT_MACROS ]
+
+
+#endif // _MSC_STDINT_H_ ]
--- /dev/null
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
+add_library (z_bundled STATIC
+ adler32.c
+ compress.c
+ crc32.c
+ gzio.c
+ uncompr.c
+ deflate.c
+ trees.c
+ zutil.c
+ inflate.c
+ infback.c
+ inftrees.c
+ inffast.c
+)
+
+set_target_properties (z_bundled PROPERTIES
+ COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS}"
+)
--- /dev/null
+
+ ChangeLog file for zlib
+
+Changes in 1.2.3 (18 July 2005)
+- Apply security vulnerability fixes to contrib/infback9 as well
+- Clean up some text files (carriage returns, trailing space)
+- Update testzlib, vstudio, masmx64, and masmx86 in contrib [Vollant]
+
+Changes in 1.2.2.4 (11 July 2005)
+- Add inflatePrime() function for starting inflation at bit boundary
+- Avoid some Visual C warnings in deflate.c
+- Avoid more silly Visual C warnings in inflate.c and inftrees.c for 64-bit
+ compile
+- Fix some spelling errors in comments [Betts]
+- Correct inflateInit2() error return documentation in zlib.h
+- Added zran.c example of compressed data random access to examples
+ directory, shows use of inflatePrime()
+- Fix cast for assignments to strm->state in inflate.c and infback.c
+- Fix zlibCompileFlags() in zutil.c to use 1L for long shifts [Oberhumer]
+- Move declarations of gf2 functions to right place in crc32.c [Oberhumer]
+- Add cast in trees.c t avoid a warning [Oberhumer]
+- Avoid some warnings in fitblk.c, gun.c, gzjoin.c in examples [Oberhumer]
+- Update make_vms.com [Zinser]
+- Initialize state->write in inflateReset() since copied in inflate_fast()
+- Be more strict on incomplete code sets in inflate_table() and increase
+ ENOUGH and MAXD -- this repairs a possible security vulnerability for
+ invalid inflate input. Thanks to Tavis Ormandy and Markus Oberhumer for
+ discovering the vulnerability and providing test cases.
+- Add ia64 support to configure for HP-UX [Smith]
+- Add error return to gzread() for format or i/o error [Levin]
+- Use malloc.h for OS/2 [Necasek]
+
+Changes in 1.2.2.3 (27 May 2005)
+- Replace 1U constants in inflate.c and inftrees.c for 64-bit compile
+- Typecast fread() return values in gzio.c [Vollant]
+- Remove trailing space in minigzip.c outmode (VC++ can't deal with it)
+- Fix crc check bug in gzread() after gzungetc() [Heiner]
+- Add the deflateTune() function to adjust internal compression parameters
+- Add a fast gzip decompressor, gun.c, to examples (use of inflateBack)
+- Remove an incorrect assertion in examples/zpipe.c
+- Add C++ wrapper in infback9.h [Donais]
+- Fix bug in inflateCopy() when decoding fixed codes
+- Note in zlib.h how much deflateSetDictionary() actually uses
+- Remove USE_DICT_HEAD in deflate.c (would mess up inflate if used)
+- Add _WIN32_WCE to define WIN32 in zconf.in.h [Spencer]
+- Don't include stderr.h or errno.h for _WIN32_WCE in zutil.h [Spencer]
+- Add gzdirect() function to indicate transparent reads
+- Update contrib/minizip [Vollant]
+- Fix compilation of deflate.c when both ASMV and FASTEST [Oberhumer]
+- Add casts in crc32.c to avoid warnings [Oberhumer]
+- Add contrib/masmx64 [Vollant]
+- Update contrib/asm586, asm686, masmx86, testzlib, vstudio [Vollant]
+
+Changes in 1.2.2.2 (30 December 2004)
+- Replace structure assignments in deflate.c and inflate.c with zmemcpy to
+ avoid implicit memcpy calls (portability for no-library compilation)
+- Increase sprintf() buffer size in gzdopen() to allow for large numbers
+- Add INFLATE_STRICT to check distances against zlib header
+- Improve WinCE errno handling and comments [Chang]
+- Remove comment about no gzip header processing in FAQ
+- Add Z_FIXED strategy option to deflateInit2() to force fixed trees
+- Add updated make_vms.com [Coghlan], update README
+- Create a new "examples" directory, move gzappend.c there, add zpipe.c,
+ fitblk.c, gzlog.[ch], gzjoin.c, and zlib_how.html.
+- Add FAQ entry and comments in deflate.c on uninitialized memory access
+- Add Solaris 9 make options in configure [Gilbert]
+- Allow strerror() usage in gzio.c for STDC
+- Fix DecompressBuf in contrib/delphi/ZLib.pas [ManChesTer]
+- Update contrib/masmx86/inffas32.asm and gvmat32.asm [Vollant]
+- Use z_off_t for adler32_combine() and crc32_combine() lengths
+- Make adler32() much faster for small len
+- Use OS_CODE in deflate() default gzip header
+
+Changes in 1.2.2.1 (31 October 2004)
+- Allow inflateSetDictionary() call for raw inflate
+- Fix inflate header crc check bug for file names and comments
+- Add deflateSetHeader() and gz_header structure for custom gzip headers
+- Add inflateGetheader() to retrieve gzip headers
+- Add crc32_combine() and adler32_combine() functions
+- Add alloc_func, free_func, in_func, out_func to Z_PREFIX list
+- Use zstreamp consistently in zlib.h (inflate_back functions)
+- Remove GUNZIP condition from definition of inflate_mode in inflate.h
+ and in contrib/inflate86/inffast.S [Truta, Anderson]
+- Add support for AMD64 in contrib/inflate86/inffas86.c [Anderson]
+- Update projects/README.projects and projects/visualc6 [Truta]
+- Update win32/DLL_FAQ.txt [Truta]
+- Avoid warning under NO_GZCOMPRESS in gzio.c; fix typo [Truta]
+- Deprecate Z_ASCII; use Z_TEXT instead [Truta]
+- Use a new algorithm for setting strm->data_type in trees.c [Truta]
+- Do not define an exit() prototype in zutil.c unless DEBUG defined
+- Remove prototype of exit() from zutil.c, example.c, minigzip.c [Truta]
+- Add comment in zlib.h for Z_NO_FLUSH parameter to deflate()
+- Fix Darwin build version identification [Peterson]
+
+Changes in 1.2.2 (3 October 2004)
+- Update zlib.h comments on gzip in-memory processing
+- Set adler to 1 in inflateReset() to support Java test suite [Walles]
+- Add contrib/dotzlib [Ravn]
+- Update win32/DLL_FAQ.txt [Truta]
+- Update contrib/minizip [Vollant]
+- Move contrib/visual-basic.txt to old/ [Truta]
+- Fix assembler builds in projects/visualc6/ [Truta]
+
+Changes in 1.2.1.2 (9 September 2004)
+- Update INDEX file
+- Fix trees.c to update strm->data_type (no one ever noticed!)
+- Fix bug in error case in inflate.c, infback.c, and infback9.c [Brown]
+- Add "volatile" to crc table flag declaration (for DYNAMIC_CRC_TABLE)
+- Add limited multitasking protection to DYNAMIC_CRC_TABLE
+- Add NO_vsnprintf for VMS in zutil.h [Mozilla]
+- Don't declare strerror() under VMS [Mozilla]
+- Add comment to DYNAMIC_CRC_TABLE to use get_crc_table() to initialize
+- Update contrib/ada [Anisimkov]
+- Update contrib/minizip [Vollant]
+- Fix configure to not hardcode directories for Darwin [Peterson]
+- Fix gzio.c to not return error on empty files [Brown]
+- Fix indentation; update version in contrib/delphi/ZLib.pas and
+ contrib/pascal/zlibpas.pas [Truta]
+- Update mkasm.bat in contrib/masmx86 [Truta]
+- Update contrib/untgz [Truta]
+- Add projects/README.projects [Truta]
+- Add project for MS Visual C++ 6.0 in projects/visualc6 [Cadieux, Truta]
+- Update win32/DLL_FAQ.txt [Truta]
+- Update list of Z_PREFIX symbols in zconf.h [Randers-Pehrson, Truta]
+- Remove an unnecessary assignment to curr in inftrees.c [Truta]
+- Add OS/2 to exe builds in configure [Poltorak]
+- Remove err dummy parameter in zlib.h [Kientzle]
+
+Changes in 1.2.1.1 (9 January 2004)
+- Update email address in README
+- Several FAQ updates
+- Fix a big fat bug in inftrees.c that prevented decoding valid
+ dynamic blocks with only literals and no distance codes --
+ Thanks to "Hot Emu" for the bug report and sample file
+- Add a note to puff.c on no distance codes case.
+
+Changes in 1.2.1 (17 November 2003)
+- Remove a tab in contrib/gzappend/gzappend.c
+- Update some interfaces in contrib for new zlib functions
+- Update zlib version number in some contrib entries
+- Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
+- Support shared libraries on Hurd and KFreeBSD [Brown]
+- Fix error in NO_DIVIDE option of adler32.c
+
+Changes in 1.2.0.8 (4 November 2003)
+- Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
+- Add experimental NO_DIVIDE #define in adler32.c
+ - Possibly faster on some processors (let me know if it is)
+- Correct Z_BLOCK to not return on first inflate call if no wrap
+- Fix strm->data_type on inflate() return to correctly indicate EOB
+- Add deflatePrime() function for appending in the middle of a byte
+- Add contrib/gzappend for an example of appending to a stream
+- Update win32/DLL_FAQ.txt [Truta]
+- Delete Turbo C comment in README [Truta]
+- Improve some indentation in zconf.h [Truta]
+- Fix infinite loop on bad input in configure script [Church]
+- Fix gzeof() for concatenated gzip files [Johnson]
+- Add example to contrib/visual-basic.txt [Michael B.]
+- Add -p to mkdir's in Makefile.in [vda]
+- Fix configure to properly detect presence or lack of printf functions
+- Add AS400 support [Monnerat]
+- Add a little Cygwin support [Wilson]
+
+Changes in 1.2.0.7 (21 September 2003)
+- Correct some debug formats in contrib/infback9
+- Cast a type in a debug statement in trees.c
+- Change search and replace delimiter in configure from % to # [Beebe]
+- Update contrib/untgz to 0.2 with various fixes [Truta]
+- Add build support for Amiga [Nikl]
+- Remove some directories in old that have been updated to 1.2
+- Add dylib building for Mac OS X in configure and Makefile.in
+- Remove old distribution stuff from Makefile
+- Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
+- Update links in README
+
+Changes in 1.2.0.6 (13 September 2003)
+- Minor FAQ updates
+- Update contrib/minizip to 1.00 [Vollant]
+- Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
+- Update POSTINC comment for 68060 [Nikl]
+- Add contrib/infback9 with deflate64 decoding (unsupported)
+- For MVS define NO_vsnprintf and undefine FAR [van Burik]
+- Add pragma for fdopen on MVS [van Burik]
+
+Changes in 1.2.0.5 (8 September 2003)
+- Add OF to inflateBackEnd() declaration in zlib.h
+- Remember start when using gzdopen in the middle of a file
+- Use internal off_t counters in gz* functions to properly handle seeks
+- Perform more rigorous check for distance-too-far in inffast.c
+- Add Z_BLOCK flush option to return from inflate at block boundary
+- Set strm->data_type on return from inflate
+ - Indicate bits unused, if at block boundary, and if in last block
+- Replace size_t with ptrdiff_t in crc32.c, and check for correct size
+- Add condition so old NO_DEFLATE define still works for compatibility
+- FAQ update regarding the Windows DLL [Truta]
+- INDEX update: add qnx entry, remove aix entry [Truta]
+- Install zlib.3 into mandir [Wilson]
+- Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta]
+- Adapt the zlib interface to the new DLL convention guidelines [Truta]
+- Introduce ZLIB_WINAPI macro to allow the export of functions using
+ the WINAPI calling convention, for Visual Basic [Vollant, Truta]
+- Update msdos and win32 scripts and makefiles [Truta]
+- Export symbols by name, not by ordinal, in win32/zlib.def [Truta]
+- Add contrib/ada [Anisimkov]
+- Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta]
+- Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant]
+- Add contrib/masm686 [Truta]
+- Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm
+ [Truta, Vollant]
+- Update contrib/delphi; rename to contrib/pascal; add example [Truta]
+- Remove contrib/delphi2; add a new contrib/delphi [Truta]
+- Avoid inclusion of the nonstandard <memory.h> in contrib/iostream,
+ and fix some method prototypes [Truta]
+- Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip
+ [Truta]
+- Avoid the use of backslash (\) in contrib/minizip [Vollant]
+- Fix file time handling in contrib/untgz; update makefiles [Truta]
+- Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines
+ [Vollant]
+- Remove contrib/vstudio/vc15_16 [Vollant]
+- Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta]
+- Update README.contrib [Truta]
+- Invert the assignment order of match_head and s->prev[...] in
+ INSERT_STRING [Truta]
+- Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings
+ [Truta]
+- Compare function pointers with 0, not with NULL or Z_NULL [Truta]
+- Fix prototype of syncsearch in inflate.c [Truta]
+- Introduce ASMINF macro to be enabled when using an ASM implementation
+ of inflate_fast [Truta]
+- Change NO_DEFLATE to NO_GZCOMPRESS [Truta]
+- Modify test_gzio in example.c to take a single file name as a
+ parameter [Truta]
+- Exit the example.c program if gzopen fails [Truta]
+- Add type casts around strlen in example.c [Truta]
+- Remove casting to sizeof in minigzip.c; give a proper type
+ to the variable compared with SUFFIX_LEN [Truta]
+- Update definitions of STDC and STDC99 in zconf.h [Truta]
+- Synchronize zconf.h with the new Windows DLL interface [Truta]
+- Use SYS16BIT instead of __32BIT__ to distinguish between
+ 16- and 32-bit platforms [Truta]
+- Use far memory allocators in small 16-bit memory models for
+ Turbo C [Truta]
+- Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in
+ zlibCompileFlags [Truta]
+- Cygwin has vsnprintf [Wilson]
+- In Windows16, OS_CODE is 0, as in MSDOS [Truta]
+- In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson]
+
+Changes in 1.2.0.4 (10 August 2003)
+- Minor FAQ updates
+- Be more strict when checking inflateInit2's windowBits parameter
+- Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well
+- Add gzip wrapper option to deflateInit2 using windowBits
+- Add updated QNX rule in configure and qnx directory [Bonnefoy]
+- Make inflate distance-too-far checks more rigorous
+- Clean up FAR usage in inflate
+- Add casting to sizeof() in gzio.c and minigzip.c
+
+Changes in 1.2.0.3 (19 July 2003)
+- Fix silly error in gzungetc() implementation [Vollant]
+- Update contrib/minizip and contrib/vstudio [Vollant]
+- Fix printf format in example.c
+- Correct cdecl support in zconf.in.h [Anisimkov]
+- Minor FAQ updates
+
+Changes in 1.2.0.2 (13 July 2003)
+- Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons
+- Attempt to avoid warnings in crc32.c for pointer-int conversion
+- Add AIX to configure, remove aix directory [Bakker]
+- Add some casts to minigzip.c
+- Improve checking after insecure sprintf() or vsprintf() calls
+- Remove #elif's from crc32.c
+- Change leave label to inf_leave in inflate.c and infback.c to avoid
+ library conflicts
+- Remove inflate gzip decoding by default--only enable gzip decoding by
+ special request for stricter backward compatibility
+- Add zlibCompileFlags() function to return compilation information
+- More typecasting in deflate.c to avoid warnings
+- Remove leading underscore from _Capital #defines [Truta]
+- Fix configure to link shared library when testing
+- Add some Windows CE target adjustments [Mai]
+- Remove #define ZLIB_DLL in zconf.h [Vollant]
+- Add zlib.3 [Rodgers]
+- Update RFC URL in deflate.c and algorithm.txt [Mai]
+- Add zlib_dll_FAQ.txt to contrib [Truta]
+- Add UL to some constants [Truta]
+- Update minizip and vstudio [Vollant]
+- Remove vestigial NEED_DUMMY_RETURN from zconf.in.h
+- Expand use of NO_DUMMY_DECL to avoid all dummy structures
+- Added iostream3 to contrib [Schwardt]
+- Replace rewind() with fseek() for WinCE [Truta]
+- Improve setting of zlib format compression level flags
+ - Report 0 for huffman and rle strategies and for level == 0 or 1
+ - Report 2 only for level == 6
+- Only deal with 64K limit when necessary at compile time [Truta]
+- Allow TOO_FAR check to be turned off at compile time [Truta]
+- Add gzclearerr() function [Souza]
+- Add gzungetc() function
+
+Changes in 1.2.0.1 (17 March 2003)
+- Add Z_RLE strategy for run-length encoding [Truta]
+ - When Z_RLE requested, restrict matches to distance one
+ - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE
+- Correct FASTEST compilation to allow level == 0
+- Clean up what gets compiled for FASTEST
+- Incorporate changes to zconf.in.h [Vollant]
+ - Refine detection of Turbo C need for dummy returns
+ - Refine ZLIB_DLL compilation
+ - Include additional header file on VMS for off_t typedef
+- Try to use _vsnprintf where it supplants vsprintf [Vollant]
+- Add some casts in inffast.c
+- Enchance comments in zlib.h on what happens if gzprintf() tries to
+ write more than 4095 bytes before compression
+- Remove unused state from inflateBackEnd()
+- Remove exit(0) from minigzip.c, example.c
+- Get rid of all those darn tabs
+- Add "check" target to Makefile.in that does the same thing as "test"
+- Add "mostlyclean" and "maintainer-clean" targets to Makefile.in
+- Update contrib/inflate86 [Anderson]
+- Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]
+- Add msdos and win32 directories with makefiles [Truta]
+- More additions and improvements to the FAQ
+
+Changes in 1.2.0 (9 March 2003)
+- New and improved inflate code
+ - About 20% faster
+ - Does not allocate 32K window unless and until needed
+ - Automatically detects and decompresses gzip streams
+ - Raw inflate no longer needs an extra dummy byte at end
+ - Added inflateBack functions using a callback interface--even faster
+ than inflate, useful for file utilities (gzip, zip)
+ - Added inflateCopy() function to record state for random access on
+ externally generated deflate streams (e.g. in gzip files)
+ - More readable code (I hope)
+- New and improved crc32()
+ - About 50% faster, thanks to suggestions from Rodney Brown
+- Add deflateBound() and compressBound() functions
+- Fix memory leak in deflateInit2()
+- Permit setting dictionary for raw deflate (for parallel deflate)
+- Fix const declaration for gzwrite()
+- Check for some malloc() failures in gzio.c
+- Fix bug in gzopen() on single-byte file 0x1f
+- Fix bug in gzread() on concatenated file with 0x1f at end of buffer
+ and next buffer doesn't start with 0x8b
+- Fix uncompress() to return Z_DATA_ERROR on truncated input
+- Free memory at end of example.c
+- Remove MAX #define in trees.c (conflicted with some libraries)
+- Fix static const's in deflate.c, gzio.c, and zutil.[ch]
+- Declare malloc() and free() in gzio.c if STDC not defined
+- Use malloc() instead of calloc() in zutil.c if int big enough
+- Define STDC for AIX
+- Add aix/ with approach for compiling shared library on AIX
+- Add HP-UX support for shared libraries in configure
+- Add OpenUNIX support for shared libraries in configure
+- Use $cc instead of gcc to build shared library
+- Make prefix directory if needed when installing
+- Correct Macintosh avoidance of typedef Byte in zconf.h
+- Correct Turbo C memory allocation when under Linux
+- Use libz.a instead of -lz in Makefile (assure use of compiled library)
+- Update configure to check for snprintf or vsnprintf functions and their
+ return value, warn during make if using an insecure function
+- Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
+ is lost when library is used--resolution is to build new zconf.h
+- Documentation improvements (in zlib.h):
+ - Document raw deflate and inflate
+ - Update RFCs URL
+ - Point out that zlib and gzip formats are different
+ - Note that Z_BUF_ERROR is not fatal
+ - Document string limit for gzprintf() and possible buffer overflow
+ - Note requirement on avail_out when flushing
+ - Note permitted values of flush parameter of inflate()
+- Add some FAQs (and even answers) to the FAQ
+- Add contrib/inflate86/ for x86 faster inflate
+- Add contrib/blast/ for PKWare Data Compression Library decompression
+- Add contrib/puff/ simple inflate for deflate format description
+
+Changes in 1.1.4 (11 March 2002)
+- ZFREE was repeated on same allocation on some error conditions.
+ This creates a security problem described in
+ http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+ less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+ of 256 bytes. (A complete fix will be available in 1.1.5).
+
+Changes in 1.1.3 (9 July 1998)
+- fix "an inflate input buffer bug that shows up on rare but persistent
+ occasions" (Mark)
+- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
+- fix gzseek(..., SEEK_SET) in write mode
+- fix crc check after a gzeek (Frank Faubert)
+- fix miniunzip when the last entry in a zip file is itself a zip file
+ (J Lillge)
+- add contrib/asm586 and contrib/asm686 (Brian Raiter)
+ See http://www.muppetlabs.com/~breadbox/software/assembly.html
+- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
+- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
+- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
+- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
+- added a FAQ file
+
+- Support gzdopen on Mac with Metrowerks (Jason Linhart)
+- Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
+- define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
+- avoid some warnings with Borland C (Tom Tanner)
+- fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
+- emulate utime() for WIN32 in contrib/untgz (Gilles Vollant)
+- allow several arguments to configure (Tim Mooney, Frodo Looijaard)
+- use libdir and includedir in Makefile.in (Tim Mooney)
+- support shared libraries on OSF1 V4 (Tim Mooney)
+- remove so_locations in "make clean" (Tim Mooney)
+- fix maketree.c compilation error (Glenn, Mark)
+- Python interface to zlib now in Python 1.5 (Jeremy Hylton)
+- new Makefile.riscos (Rich Walker)
+- initialize static descriptors in trees.c for embedded targets (Nick Smith)
+- use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
+- add the OS/2 files in Makefile.in too (Andrew Zabolotny)
+- fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
+- fix maketree.c to allow clean compilation of inffixed.h (Mark)
+- fix parameter check in deflateCopy (Gunther Nikl)
+- cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
+- Many portability patches by Christian Spieler:
+ . zutil.c, zutil.h: added "const" for zmem*
+ . Make_vms.com: fixed some typos
+ . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
+ . msdos/Makefile.msc: remove "default rtl link library" info from obj files
+ . msdos/Makefile.*: use model-dependent name for the built zlib library
+ . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
+ new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
+- use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
+- replace __far with _far for better portability (Christian Spieler, Tom Lane)
+- fix test for errno.h in configure (Tim Newsham)
+
+Changes in 1.1.2 (19 March 98)
+- added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
+ See http://www.winimage.com/zLibDll/unzip.html
+- preinitialize the inflate tables for fixed codes, to make the code
+ completely thread safe (Mark)
+- some simplifications and slight speed-up to the inflate code (Mark)
+- fix gzeof on non-compressed files (Allan Schrum)
+- add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
+- use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
+- added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
+- add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
+- do not wrap extern "C" around system includes (Tom Lane)
+- mention zlib binding for TCL in README (Andreas Kupries)
+- added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
+- allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
+- allow "configure --prefix $HOME" (Tim Mooney)
+- remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)
+- move Makefile.sas to amiga/Makefile.sas
+
+Changes in 1.1.1 (27 Feb 98)
+- fix macros _tr_tally_* in deflate.h for debug mode (Glenn Randers-Pehrson)
+- remove block truncation heuristic which had very marginal effect for zlib
+ (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
+ compression ratio on some files. This also allows inlining _tr_tally for
+ matches in deflate_slow.
+- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
+
+Changes in 1.1.0 (24 Feb 98)
+- do not return STREAM_END prematurely in inflate (John Bowler)
+- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
+- compile with -DFASTEST to get compression code optimized for speed only
+- in minigzip, try mmap'ing the input file first (Miguel Albrecht)
+- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
+ on Sun but significant on HP)
+
+- add a pointer to experimental unzip library in README (Gilles Vollant)
+- initialize variable gcc in configure (Chris Herborth)
+
+Changes in 1.0.9 (17 Feb 1998)
+- added gzputs and gzgets functions
+- do not clear eof flag in gzseek (Mark Diekhans)
+- fix gzseek for files in transparent mode (Mark Diekhans)
+- do not assume that vsprintf returns the number of bytes written (Jens Krinke)
+- replace EXPORT with ZEXPORT to avoid conflict with other programs
+- added compress2 in zconf.h, zlib.def, zlib.dnt
+- new asm code from Gilles Vollant in contrib/asm386
+- simplify the inflate code (Mark):
+ . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
+ . ZALLOC the length list in inflate_trees_fixed() instead of using stack
+ . ZALLOC the value area for huft_build() instead of using stack
+ . Simplify Z_FINISH check in inflate()
+
+- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
+- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
+- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
+ the declaration of FAR (Gilles VOllant)
+- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
+- read_buf buf parameter of type Bytef* instead of charf*
+- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
+- do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
+- fix check for presence of directories in "make install" (Ian Willis)
+
+Changes in 1.0.8 (27 Jan 1998)
+- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
+- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
+- added compress2() to allow setting the compression level
+- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
+- use constant arrays for the static trees in trees.c instead of computing
+ them at run time (thanks to Ken Raeburn for this suggestion). To create
+ trees.h, compile with GEN_TREES_H and run "make test".
+- check return code of example in "make test" and display result
+- pass minigzip command line options to file_compress
+- simplifying code of inflateSync to avoid gcc 2.8 bug
+
+- support CC="gcc -Wall" in configure -s (QingLong)
+- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
+- fix test for shared library support to avoid compiler warnings
+- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
+- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
+- do not use fdopen for Metrowerks on Mac (Brad Pettit))
+- add checks for gzputc and gzputc in example.c
+- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
+- use const for the CRC table (Ken Raeburn)
+- fixed "make uninstall" for shared libraries
+- use Tracev instead of Trace in infblock.c
+- in example.c use correct compressed length for test_sync
+- suppress +vnocompatwarnings in configure for HPUX (not always supported)
+
+Changes in 1.0.7 (20 Jan 1998)
+- fix gzseek which was broken in write mode
+- return error for gzseek to negative absolute position
+- fix configure for Linux (Chun-Chung Chen)
+- increase stack space for MSC (Tim Wegner)
+- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
+- define EXPORTVA for gzprintf (Gilles Vollant)
+- added man page zlib.3 (Rick Rodgers)
+- for contrib/untgz, fix makedir() and improve Makefile
+
+- check gzseek in write mode in example.c
+- allocate extra buffer for seeks only if gzseek is actually called
+- avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)
+- add inflateSyncPoint in zconf.h
+- fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def
+
+Changes in 1.0.6 (19 Jan 1998)
+- add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
+ gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
+- Fix a deflate bug occurring only with compression level 0 (thanks to
+ Andy Buckler for finding this one).
+- In minigzip, pass transparently also the first byte for .Z files.
+- return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
+- check Z_FINISH in inflate (thanks to Marc Schluper)
+- Implement deflateCopy (thanks to Adam Costello)
+- make static libraries by default in configure, add --shared option.
+- move MSDOS or Windows specific files to directory msdos
+- suppress the notion of partial flush to simplify the interface
+ (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
+- suppress history buffer provided by application to simplify the interface
+ (this feature was not implemented anyway in 1.0.4)
+- next_in and avail_in must be initialized before calling inflateInit or
+ inflateInit2
+- add EXPORT in all exported functions (for Windows DLL)
+- added Makefile.nt (thanks to Stephen Williams)
+- added the unsupported "contrib" directory:
+ contrib/asm386/ by Gilles Vollant <info@winimage.com>
+ 386 asm code replacing longest_match().
+ contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
+ A C++ I/O streams interface to the zlib gz* functions
+ contrib/iostream2/ by Tyge Løvset <Tyge.Lovset@cmr.no>
+ Another C++ I/O streams interface
+ contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
+ A very simple tar.gz file extractor using zlib
+ contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
+ How to use compress(), uncompress() and the gz* functions from VB.
+- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
+ level) in minigzip (thanks to Tom Lane)
+
+- use const for rommable constants in deflate
+- added test for gzseek and gztell in example.c
+- add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
+- add undocumented function zError to convert error code to string
+ (for Tim Smithers)
+- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.
+- Use default memcpy for Symantec MSDOS compiler.
+- Add EXPORT keyword for check_func (needed for Windows DLL)
+- add current directory to LD_LIBRARY_PATH for "make test"
+- create also a link for libz.so.1
+- added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)
+- use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)
+- added -soname for Linux in configure (Chun-Chung Chen,
+- assign numbers to the exported functions in zlib.def (for Windows DLL)
+- add advice in zlib.h for best usage of deflateSetDictionary
+- work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)
+- allow compilation with ANSI keywords only enabled for TurboC in large model
+- avoid "versionString"[0] (Borland bug)
+- add NEED_DUMMY_RETURN for Borland
+- use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
+- allow compilation with CC
+- defined STDC for OS/2 (David Charlap)
+- limit external names to 8 chars for MVS (Thomas Lund)
+- in minigzip.c, use static buffers only for 16-bit systems
+- fix suffix check for "minigzip -d foo.gz"
+- do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)
+- use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
+- added makelcc.bat for lcc-win32 (Tom St Denis)
+- in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
+- Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
+- check for unistd.h in configure (for off_t)
+- remove useless check parameter in inflate_blocks_free
+- avoid useless assignment of s->check to itself in inflate_blocks_new
+- do not flush twice in gzclose (thanks to Ken Raeburn)
+- rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h
+- use NO_ERRNO_H instead of enumeration of operating systems with errno.h
+- work around buggy fclose on pipes for HP/UX
+- support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)
+- fix configure if CC is already equal to gcc
+
+Changes in 1.0.5 (3 Jan 98)
+- Fix inflate to terminate gracefully when fed corrupted or invalid data
+- Use const for rommable constants in inflate
+- Eliminate memory leaks on error conditions in inflate
+- Removed some vestigial code in inflate
+- Update web address in README
+
+Changes in 1.0.4 (24 Jul 96)
+- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
+ bit, so the decompressor could decompress all the correct data but went
+ on to attempt decompressing extra garbage data. This affected minigzip too.
+- zlibVersion and gzerror return const char* (needed for DLL)
+- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
+- use z_error only for DEBUG (avoid problem with DLLs)
+
+Changes in 1.0.3 (2 Jul 96)
+- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
+ small and medium models; this makes the library incompatible with previous
+ versions for these models. (No effect in large model or on other systems.)
+- return OK instead of BUF_ERROR if previous deflate call returned with
+ avail_out as zero but there is nothing to do
+- added memcmp for non STDC compilers
+- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
+- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
+- better check for 16-bit mode MSC (avoids problem with Symantec)
+
+Changes in 1.0.2 (23 May 96)
+- added Windows DLL support
+- added a function zlibVersion (for the DLL support)
+- fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
+- Bytef is define's instead of typedef'd only for Borland C
+- avoid reading uninitialized memory in example.c
+- mention in README that the zlib format is now RFC1950
+- updated Makefile.dj2
+- added algorithm.doc
+
+Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
+- fix array overlay in deflate.c which sometimes caused bad compressed data
+- fix inflate bug with empty stored block
+- fix MSDOS medium model which was broken in 0.99
+- fix deflateParams() which could generated bad compressed data.
+- Bytef is define'd instead of typedef'ed (work around Borland bug)
+- added an INDEX file
+- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
+ Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
+- speed up adler32 for modern machines without auto-increment
+- added -ansi for IRIX in configure
+- static_init_done in trees.c is an int
+- define unlink as delete for VMS
+- fix configure for QNX
+- add configure branch for SCO and HPUX
+- avoid many warnings (unused variables, dead assignments, etc...)
+- no fdopen for BeOS
+- fix the Watcom fix for 32 bit mode (define FAR as empty)
+- removed redefinition of Byte for MKWERKS
+- work around an MWKERKS bug (incorrect merge of all .h files)
+
+Changes in 0.99 (27 Jan 96)
+- allow preset dictionary shared between compressor and decompressor
+- allow compression level 0 (no compression)
+- add deflateParams in zlib.h: allow dynamic change of compression level
+ and compression strategy.
+- test large buffers and deflateParams in example.c
+- add optional "configure" to build zlib as a shared library
+- suppress Makefile.qnx, use configure instead
+- fixed deflate for 64-bit systems (detected on Cray)
+- fixed inflate_blocks for 64-bit systems (detected on Alpha)
+- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
+- always return Z_BUF_ERROR when deflate() has nothing to do
+- deflateInit and inflateInit are now macros to allow version checking
+- prefix all global functions and types with z_ with -DZ_PREFIX
+- make falloc completely reentrant (inftrees.c)
+- fixed very unlikely race condition in ct_static_init
+- free in reverse order of allocation to help memory manager
+- use zlib-1.0/* instead of zlib/* inside the tar.gz
+- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
+ -Wconversion -Wstrict-prototypes -Wmissing-prototypes"
+- allow gzread on concatenated .gz files
+- deflateEnd now returns Z_DATA_ERROR if it was premature
+- deflate is finally (?) fully deterministic (no matches beyond end of input)
+- Document Z_SYNC_FLUSH
+- add uninstall in Makefile
+- Check for __cpluplus in zlib.h
+- Better test in ct_align for partial flush
+- avoid harmless warnings for Borland C++
+- initialize hash_head in deflate.c
+- avoid warning on fdopen (gzio.c) for HP cc -Aa
+- include stdlib.h for STDC compilers
+- include errno.h for Cray
+- ignore error if ranlib doesn't exist
+- call ranlib twice for NeXTSTEP
+- use exec_prefix instead of prefix for libz.a
+- renamed ct_* as _tr_* to avoid conflict with applications
+- clear z->msg in inflateInit2 before any error return
+- initialize opaque in example.c, gzio.c, deflate.c and inflate.c
+- fixed typo in zconf.h (_GNUC__ => __GNUC__)
+- check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)
+- fix typo in Make_vms.com (f$trnlnm -> f$getsyi)
+- in fcalloc, normalize pointer if size > 65520 bytes
+- don't use special fcalloc for 32 bit Borland C++
+- use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...
+- use Z_BINARY instead of BINARY
+- document that gzclose after gzdopen will close the file
+- allow "a" as mode in gzopen.
+- fix error checking in gzread
+- allow skipping .gz extra-field on pipes
+- added reference to Perl interface in README
+- put the crc table in FAR data (I dislike more and more the medium model :)
+- added get_crc_table
+- added a dimension to all arrays (Borland C can't count).
+- workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
+- guard against multiple inclusion of *.h (for precompiled header on Mac)
+- Watcom C pretends to be Microsoft C small model even in 32 bit mode.
+- don't use unsized arrays to avoid silly warnings by Visual C++:
+ warning C4746: 'inflate_mask' : unsized array treated as '__far'
+ (what's wrong with far data in far model?).
+- define enum out of inflate_blocks_state to allow compilation with C++
+
+Changes in 0.95 (16 Aug 95)
+- fix MSDOS small and medium model (now easier to adapt to any compiler)
+- inlined send_bits
+- fix the final (:-) bug for deflate with flush (output was correct but
+ not completely flushed in rare occasions).
+- default window size is same for compression and decompression
+ (it's now sufficient to set MAX_WBITS in zconf.h).
+- voidp -> voidpf and voidnp -> voidp (for consistency with other
+ typedefs and because voidnp was not near in large model).
+
+Changes in 0.94 (13 Aug 95)
+- support MSDOS medium model
+- fix deflate with flush (could sometimes generate bad output)
+- fix deflateReset (zlib header was incorrectly suppressed)
+- added support for VMS
+- allow a compression level in gzopen()
+- gzflush now calls fflush
+- For deflate with flush, flush even if no more input is provided.
+- rename libgz.a as libz.a
+- avoid complex expression in infcodes.c triggering Turbo C bug
+- work around a problem with gcc on Alpha (in INSERT_STRING)
+- don't use inline functions (problem with some gcc versions)
+- allow renaming of Byte, uInt, etc... with #define.
+- avoid warning about (unused) pointer before start of array in deflate.c
+- avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
+- avoid reserved word 'new' in trees.c
+
+Changes in 0.93 (25 June 95)
+- temporarily disable inline functions
+- make deflate deterministic
+- give enough lookahead for PARTIAL_FLUSH
+- Set binary mode for stdin/stdout in minigzip.c for OS/2
+- don't even use signed char in inflate (not portable enough)
+- fix inflate memory leak for segmented architectures
+
+Changes in 0.92 (3 May 95)
+- don't assume that char is signed (problem on SGI)
+- Clear bit buffer when starting a stored block
+- no memcpy on Pyramid
+- suppressed inftest.c
+- optimized fill_window, put longest_match inline for gcc
+- optimized inflate on stored blocks.
+- untabify all sources to simplify patches
+
+Changes in 0.91 (2 May 95)
+- Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h
+- Document the memory requirements in zconf.h
+- added "make install"
+- fix sync search logic in inflateSync
+- deflate(Z_FULL_FLUSH) now works even if output buffer too short
+- after inflateSync, don't scare people with just "lo world"
+- added support for DJGPP
+
+Changes in 0.9 (1 May 95)
+- don't assume that zalloc clears the allocated memory (the TurboC bug
+ was Mark's bug after all :)
+- let again gzread copy uncompressed data unchanged (was working in 0.71)
+- deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
+- added a test of inflateSync in example.c
+- moved MAX_WBITS to zconf.h because users might want to change that.
+- document explicitly that zalloc(64K) on MSDOS must return a normalized
+ pointer (zero offset)
+- added Makefiles for Microsoft C, Turbo C, Borland C++
+- faster crc32()
+
+Changes in 0.8 (29 April 95)
+- added fast inflate (inffast.c)
+- deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
+ is incompatible with previous versions of zlib which returned Z_OK.
+- work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
+ (actually that was not a compiler bug, see 0.81 above)
+- gzread no longer reads one extra byte in certain cases
+- In gzio destroy(), don't reference a freed structure
+- avoid many warnings for MSDOS
+- avoid the ERROR symbol which is used by MS Windows
+
+Changes in 0.71 (14 April 95)
+- Fixed more MSDOS compilation problems :( There is still a bug with
+ TurboC large model.
+
+Changes in 0.7 (14 April 95)
+- Added full inflate support.
+- Simplified the crc32() interface. The pre- and post-conditioning
+ (one's complement) is now done inside crc32(). WARNING: this is
+ incompatible with previous versions; see zlib.h for the new usage.
+
+Changes in 0.61 (12 April 95)
+- workaround for a bug in TurboC. example and minigzip now work on MSDOS.
+
+Changes in 0.6 (11 April 95)
+- added minigzip.c
+- added gzdopen to reopen a file descriptor as gzFile
+- added transparent reading of non-gziped files in gzread.
+- fixed bug in gzread (don't read crc as data)
+- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).
+- don't allocate big arrays in the stack (for MSDOS)
+- fix some MSDOS compilation problems
+
+Changes in 0.5:
+- do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
+ not yet Z_FULL_FLUSH.
+- support decompression but only in a single step (forced Z_FINISH)
+- added opaque object for zalloc and zfree.
+- added deflateReset and inflateReset
+- added a variable zlib_version for consistency checking.
+- renamed the 'filter' parameter of deflateInit2 as 'strategy'.
+ Added Z_FILTERED and Z_HUFFMAN_ONLY constants.
+
+Changes in 0.4:
+- avoid "zip" everywhere, use zlib instead of ziplib.
+- suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
+ if compression method == 8.
+- added adler32 and crc32
+- renamed deflateOptions as deflateInit2, call one or the other but not both
+- added the method parameter for deflateInit2.
+- added inflateInit2
+- simplied considerably deflateInit and inflateInit by not supporting
+ user-provided history buffer. This is supported only in deflateInit2
+ and inflateInit2.
+
+Changes in 0.3:
+- prefix all macro names with Z_
+- use Z_FINISH instead of deflateEnd to finish compression.
+- added Z_HUFFMAN_ONLY
+- added gzerror()
--- /dev/null
+ZLIB DATA COMPRESSION LIBRARY
+
+zlib 1.2.3 is a general purpose data compression library. All the code is
+thread safe. The data format used by the zlib library is described by RFCs
+(Request for Comments) 1950 to 1952 in the files
+http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
+and rfc1952.txt (gzip format). These documents are also available in other
+formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
+
+All functions of the compression library are documented in the file zlib.h
+(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
+of the library is given in the file example.c which also tests that the library
+is working correctly. Another example is given in the file minigzip.c. The
+compression library itself is composed of all source files except example.c and
+minigzip.c.
+
+To compile all files and run the test program, follow the instructions given at
+the top of Makefile. In short "make test; make install" should work for most
+machines. For Unix: "./configure; make test; make install". For MSDOS, use one
+of the special makefiles such as Makefile.msc. For VMS, use make_vms.com.
+
+Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
+<info@winimage.com> for the Windows DLL version. The zlib home page is
+http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem,
+please check this site to verify that you have the latest version of zlib;
+otherwise get the latest version and check whether the problem still exists or
+not.
+
+PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking
+for help.
+
+Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
+issue of Dr. Dobb's Journal; a copy of the article is available in
+http://dogma.net/markn/articles/zlibtool/zlibtool.htm
+
+The changes made in version 1.2.3 are documented in the file ChangeLog.
+
+Unsupported third party contributions are provided in directory "contrib".
+
+A Java implementation of zlib is available in the Java Development Kit
+http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html
+See the zlib home page http://www.zlib.org for details.
+
+A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the
+CPAN (Comprehensive Perl Archive Network) sites
+http://www.cpan.org/modules/by-module/Compress/
+
+A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
+available in Python 1.5 and later versions, see
+http://www.python.org/doc/lib/module-zlib.html
+
+A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is
+availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html
+
+An experimental package to read and write files in .zip format, written on top
+of zlib by Gilles Vollant <info@winimage.com>, is available in the
+contrib/minizip directory of zlib.
+
+
+Notes for some targets:
+
+- For Windows DLL versions, please see win32/DLL_FAQ.txt
+
+- For 64-bit Irix, deflate.c must be compiled without any optimization. With
+ -O, one libpng test fails. The test works in 32 bit mode (with the -n32
+ compiler flag). The compiler bug has been reported to SGI.
+
+- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
+ when compiled with cc.
+
+- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
+ necessary to get gzprintf working correctly. This is done by configure.
+
+- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
+ other compilers. Use "make test" to check your compiler.
+
+- gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
+
+- For PalmOs, see http://palmzlib.sourceforge.net/
+
+- When building a shared, i.e. dynamic library on Mac OS X, the library must be
+ installed before testing (do "make install" before "make test"), since the
+ library location is specified in the library.
+
+
+Acknowledgments:
+
+ The deflate format used by zlib was defined by Phil Katz. The deflate
+ and zlib specifications were written by L. Peter Deutsch. Thanks to all the
+ people who reported problems and suggested various improvements in zlib;
+ they are too numerous to cite here.
+
+Copyright notice:
+
+ (C) 1995-2004 Jean-loup Gailly and Mark Adler
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+ Jean-loup Gailly Mark Adler
+ jloup@gzip.org madler@alumni.caltech.edu
+
+If you use the zlib library in a product, we would appreciate *not*
+receiving lengthy legal documents to sign. The sources are provided
+for free but without warranty of any kind. The library has been
+entirely written by Jean-loup Gailly and Mark Adler; it does not
+include third-party code.
+
+If you redistribute modified sources, we would appreciate that you include
+in the file ChangeLog history information documenting your changes. Please
+read the FAQ for more information on the distribution of modified source
+versions.
--- /dev/null
+/* adler32.c -- compute the Adler-32 checksum of a data stream
+ * Copyright (C) 1995-2004 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+#define BASE 65521UL /* largest prime smaller than 65536 */
+#define NMAX 5552
+/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
+
+#define DO1(buf,i) {adler += (buf)[i]; sum2 += adler;}
+#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
+#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
+#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
+#define DO16(buf) DO8(buf,0); DO8(buf,8);
+
+/* use NO_DIVIDE if your processor does not do division in hardware */
+#ifdef NO_DIVIDE
+# define MOD(a) \
+ do { \
+ if (a >= (BASE << 16)) a -= (BASE << 16); \
+ if (a >= (BASE << 15)) a -= (BASE << 15); \
+ if (a >= (BASE << 14)) a -= (BASE << 14); \
+ if (a >= (BASE << 13)) a -= (BASE << 13); \
+ if (a >= (BASE << 12)) a -= (BASE << 12); \
+ if (a >= (BASE << 11)) a -= (BASE << 11); \
+ if (a >= (BASE << 10)) a -= (BASE << 10); \
+ if (a >= (BASE << 9)) a -= (BASE << 9); \
+ if (a >= (BASE << 8)) a -= (BASE << 8); \
+ if (a >= (BASE << 7)) a -= (BASE << 7); \
+ if (a >= (BASE << 6)) a -= (BASE << 6); \
+ if (a >= (BASE << 5)) a -= (BASE << 5); \
+ if (a >= (BASE << 4)) a -= (BASE << 4); \
+ if (a >= (BASE << 3)) a -= (BASE << 3); \
+ if (a >= (BASE << 2)) a -= (BASE << 2); \
+ if (a >= (BASE << 1)) a -= (BASE << 1); \
+ if (a >= BASE) a -= BASE; \
+ } while (0)
+# define MOD4(a) \
+ do { \
+ if (a >= (BASE << 4)) a -= (BASE << 4); \
+ if (a >= (BASE << 3)) a -= (BASE << 3); \
+ if (a >= (BASE << 2)) a -= (BASE << 2); \
+ if (a >= (BASE << 1)) a -= (BASE << 1); \
+ if (a >= BASE) a -= BASE; \
+ } while (0)
+#else
+# define MOD(a) a %= BASE
+# define MOD4(a) a %= BASE
+#endif
+
+/* ========================================================================= */
+uLong ZEXPORT adler32(adler, buf, len)
+ uLong adler;
+ const Bytef *buf;
+ uInt len;
+{
+ unsigned long sum2;
+ unsigned n;
+
+ /* split Adler-32 into component sums */
+ sum2 = (adler >> 16) & 0xffff;
+ adler &= 0xffff;
+
+ /* in case user likes doing a byte at a time, keep it fast */
+ if (len == 1) {
+ adler += buf[0];
+ if (adler >= BASE)
+ adler -= BASE;
+ sum2 += adler;
+ if (sum2 >= BASE)
+ sum2 -= BASE;
+ return adler | (sum2 << 16);
+ }
+
+ /* initial Adler-32 value (deferred check for len == 1 speed) */
+ if (buf == Z_NULL)
+ return 1L;
+
+ /* in case short lengths are provided, keep it somewhat fast */
+ if (len < 16) {
+ while (len--) {
+ adler += *buf++;
+ sum2 += adler;
+ }
+ if (adler >= BASE)
+ adler -= BASE;
+ MOD4(sum2); /* only added so many BASE's */
+ return adler | (sum2 << 16);
+ }
+
+ /* do length NMAX blocks -- requires just one modulo operation */
+ while (len >= NMAX) {
+ len -= NMAX;
+ n = NMAX / 16; /* NMAX is divisible by 16 */
+ do {
+ DO16(buf); /* 16 sums unrolled */
+ buf += 16;
+ } while (--n);
+ MOD(adler);
+ MOD(sum2);
+ }
+
+ /* do remaining bytes (less than NMAX, still just one modulo) */
+ if (len) { /* avoid modulos if none remaining */
+ while (len >= 16) {
+ len -= 16;
+ DO16(buf);
+ buf += 16;
+ }
+ while (len--) {
+ adler += *buf++;
+ sum2 += adler;
+ }
+ MOD(adler);
+ MOD(sum2);
+ }
+
+ /* return recombined sums */
+ return adler | (sum2 << 16);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT adler32_combine(adler1, adler2, len2)
+ uLong adler1;
+ uLong adler2;
+ z_off_t len2;
+{
+ unsigned long sum1;
+ unsigned long sum2;
+ unsigned rem;
+
+ /* the derivation of this formula is left as an exercise for the reader */
+ rem = (unsigned)(len2 % BASE);
+ sum1 = adler1 & 0xffff;
+ sum2 = rem * sum1;
+ MOD(sum2);
+ sum1 += (adler2 & 0xffff) + BASE - 1;
+ sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
+ if (sum1 > BASE) sum1 -= BASE;
+ if (sum1 > BASE) sum1 -= BASE;
+ if (sum2 > (BASE << 1)) sum2 -= (BASE << 1);
+ if (sum2 > BASE) sum2 -= BASE;
+ return sum1 | (sum2 << 16);
+}
--- /dev/null
+/* compress.c -- compress a memory buffer
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+/* ===========================================================================
+ Compresses the source buffer into the destination buffer. The level
+ parameter has the same meaning as in deflateInit. sourceLen is the byte
+ length of the source buffer. Upon entry, destLen is the total size of the
+ destination buffer, which must be at least 0.1% larger than sourceLen plus
+ 12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+
+ compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+ Z_STREAM_ERROR if the level parameter is invalid.
+*/
+int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
+ Bytef *dest;
+ uLongf *destLen;
+ const Bytef *source;
+ uLong sourceLen;
+ int level;
+{
+ z_stream stream;
+ int err;
+
+ stream.next_in = (Bytef*)source;
+ stream.avail_in = (uInt)sourceLen;
+#ifdef MAXSEG_64K
+ /* Check for source > 64K on 16-bit machine: */
+ if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
+#endif
+ stream.next_out = dest;
+ stream.avail_out = (uInt)*destLen;
+ if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+
+ stream.zalloc = (alloc_func)0;
+ stream.zfree = (free_func)0;
+ stream.opaque = (voidpf)0;
+
+ err = deflateInit(&stream, level);
+ if (err != Z_OK) return err;
+
+ err = deflate(&stream, Z_FINISH);
+ if (err != Z_STREAM_END) {
+ deflateEnd(&stream);
+ return err == Z_OK ? Z_BUF_ERROR : err;
+ }
+ *destLen = stream.total_out;
+
+ err = deflateEnd(&stream);
+ return err;
+}
+
+/* ===========================================================================
+ */
+int ZEXPORT compress (dest, destLen, source, sourceLen)
+ Bytef *dest;
+ uLongf *destLen;
+ const Bytef *source;
+ uLong sourceLen;
+{
+ return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
+}
+
+/* ===========================================================================
+ If the default memLevel or windowBits for deflateInit() is changed, then
+ this function needs to be updated.
+ */
+uLong ZEXPORT compressBound (sourceLen)
+ uLong sourceLen;
+{
+ return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
+}
--- /dev/null
+/* crc32.c -- compute the CRC-32 of a data stream
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
+ * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
+ * tables for updating the shift register in one step with three exclusive-ors
+ * instead of four steps with four exclusive-ors. This results in about a
+ * factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
+ */
+
+/* @(#) $Id$ */
+
+/*
+ Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
+ protection on the static variables used to control the first-use generation
+ of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should
+ first call get_crc_table() to initialize the tables before allowing more than
+ one thread to use crc32().
+ */
+
+#ifdef MAKECRCH
+# include <stdio.h>
+# ifndef DYNAMIC_CRC_TABLE
+# define DYNAMIC_CRC_TABLE
+# endif /* !DYNAMIC_CRC_TABLE */
+#endif /* MAKECRCH */
+
+#include "zutil.h" /* for STDC and FAR definitions */
+
+#define local static
+
+/* Find a four-byte integer type for crc32_little() and crc32_big(). */
+#ifndef NOBYFOUR
+# ifdef STDC /* need ANSI C limits.h to determine sizes */
+# include <limits.h>
+# define BYFOUR
+# if (UINT_MAX == 0xffffffffUL)
+ typedef unsigned int u4;
+# else
+# if (ULONG_MAX == 0xffffffffUL)
+ typedef unsigned long u4;
+# else
+# if (USHRT_MAX == 0xffffffffUL)
+ typedef unsigned short u4;
+# else
+# undef BYFOUR /* can't find a four-byte integer type! */
+# endif
+# endif
+# endif
+# endif /* STDC */
+#endif /* !NOBYFOUR */
+
+/* Definitions for doing the crc four data bytes at a time. */
+#ifdef BYFOUR
+# define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
+ (((w)&0xff00)<<8)+(((w)&0xff)<<24))
+ local unsigned long crc32_little OF((unsigned long,
+ const unsigned char FAR *, unsigned));
+ local unsigned long crc32_big OF((unsigned long,
+ const unsigned char FAR *, unsigned));
+# define TBLS 8
+#else
+# define TBLS 1
+#endif /* BYFOUR */
+
+/* Local functions for crc concatenation */
+local unsigned long gf2_matrix_times OF((unsigned long *mat,
+ unsigned long vec));
+local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
+
+#ifdef DYNAMIC_CRC_TABLE
+
+local volatile int crc_table_empty = 1;
+local unsigned long FAR crc_table[TBLS][256];
+local void make_crc_table OF((void));
+#ifdef MAKECRCH
+ local void write_table OF((FILE *, const unsigned long FAR *));
+#endif /* MAKECRCH */
+/*
+ Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
+ x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
+
+ Polynomials over GF(2) are represented in binary, one bit per coefficient,
+ with the lowest powers in the most significant bit. Then adding polynomials
+ is just exclusive-or, and multiplying a polynomial by x is a right shift by
+ one. If we call the above polynomial p, and represent a byte as the
+ polynomial q, also with the lowest power in the most significant bit (so the
+ byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
+ where a mod b means the remainder after dividing a by b.
+
+ This calculation is done using the shift-register method of multiplying and
+ taking the remainder. The register is initialized to zero, and for each
+ incoming bit, x^32 is added mod p to the register if the bit is a one (where
+ x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
+ x (which is shifting right by one and adding x^32 mod p if the bit shifted
+ out is a one). We start with the highest power (least significant bit) of
+ q and repeat for all eight bits of q.
+
+ The first table is simply the CRC of all possible eight bit values. This is
+ all the information needed to generate CRCs on data a byte at a time for all
+ combinations of CRC register values and incoming bytes. The remaining tables
+ allow for word-at-a-time CRC calculation for both big-endian and little-
+ endian machines, where a word is four bytes.
+*/
+local void make_crc_table()
+{
+ unsigned long c;
+ int n, k;
+ unsigned long poly; /* polynomial exclusive-or pattern */
+ /* terms of polynomial defining this crc (except x^32): */
+ static volatile int first = 1; /* flag to limit concurrent making */
+ static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
+
+ /* See if another task is already doing this (not thread-safe, but better
+ than nothing -- significantly reduces duration of vulnerability in
+ case the advice about DYNAMIC_CRC_TABLE is ignored) */
+ if (first) {
+ first = 0;
+
+ /* make exclusive-or pattern from polynomial (0xedb88320UL) */
+ poly = 0UL;
+ for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
+ poly |= 1UL << (31 - p[n]);
+
+ /* generate a crc for every 8-bit value */
+ for (n = 0; n < 256; n++) {
+ c = (unsigned long)n;
+ for (k = 0; k < 8; k++)
+ c = c & 1 ? poly ^ (c >> 1) : c >> 1;
+ crc_table[0][n] = c;
+ }
+
+#ifdef BYFOUR
+ /* generate crc for each value followed by one, two, and three zeros,
+ and then the byte reversal of those as well as the first table */
+ for (n = 0; n < 256; n++) {
+ c = crc_table[0][n];
+ crc_table[4][n] = REV(c);
+ for (k = 1; k < 4; k++) {
+ c = crc_table[0][c & 0xff] ^ (c >> 8);
+ crc_table[k][n] = c;
+ crc_table[k + 4][n] = REV(c);
+ }
+ }
+#endif /* BYFOUR */
+
+ crc_table_empty = 0;
+ }
+ else { /* not first */
+ /* wait for the other guy to finish (not efficient, but rare) */
+ while (crc_table_empty)
+ ;
+ }
+
+#ifdef MAKECRCH
+ /* write out CRC tables to crc32.h */
+ {
+ FILE *out;
+
+ out = fopen("crc32.h", "w");
+ if (out == NULL) return;
+ fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
+ fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
+ fprintf(out, "local const unsigned long FAR ");
+ fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
+ write_table(out, crc_table[0]);
+# ifdef BYFOUR
+ fprintf(out, "#ifdef BYFOUR\n");
+ for (k = 1; k < 8; k++) {
+ fprintf(out, " },\n {\n");
+ write_table(out, crc_table[k]);
+ }
+ fprintf(out, "#endif\n");
+# endif /* BYFOUR */
+ fprintf(out, " }\n};\n");
+ fclose(out);
+ }
+#endif /* MAKECRCH */
+}
+
+#ifdef MAKECRCH
+local void write_table(out, table)
+ FILE *out;
+ const unsigned long FAR *table;
+{
+ int n;
+
+ for (n = 0; n < 256; n++)
+ fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n],
+ n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
+}
+#endif /* MAKECRCH */
+
+#else /* !DYNAMIC_CRC_TABLE */
+/* ========================================================================
+ * Tables of CRC-32s of all single-byte values, made by make_crc_table().
+ */
+#include "crc32.h"
+#endif /* DYNAMIC_CRC_TABLE */
+
+/* =========================================================================
+ * This function can be used by asm versions of crc32()
+ */
+const unsigned long FAR * ZEXPORT get_crc_table()
+{
+#ifdef DYNAMIC_CRC_TABLE
+ if (crc_table_empty)
+ make_crc_table();
+#endif /* DYNAMIC_CRC_TABLE */
+ return (const unsigned long FAR *)crc_table;
+}
+
+/* ========================================================================= */
+#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
+#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
+
+/* ========================================================================= */
+unsigned long ZEXPORT crc32(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
+{
+ if (buf == Z_NULL) return 0UL;
+
+#ifdef DYNAMIC_CRC_TABLE
+ if (crc_table_empty)
+ make_crc_table();
+#endif /* DYNAMIC_CRC_TABLE */
+
+#ifdef BYFOUR
+ if (sizeof(void *) == sizeof(ptrdiff_t)) {
+ u4 endian;
+
+ endian = 1;
+ if (*((unsigned char *)(&endian)))
+ return crc32_little(crc, buf, len);
+ else
+ return crc32_big(crc, buf, len);
+ }
+#endif /* BYFOUR */
+ crc = crc ^ 0xffffffffUL;
+ while (len >= 8) {
+ DO8;
+ len -= 8;
+ }
+ if (len) do {
+ DO1;
+ } while (--len);
+ return crc ^ 0xffffffffUL;
+}
+
+#ifdef BYFOUR
+
+/* ========================================================================= */
+#define DOLIT4 c ^= *buf4++; \
+ c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
+ crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
+#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
+
+/* ========================================================================= */
+local unsigned long crc32_little(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
+{
+ register u4 c;
+ register const u4 FAR *buf4;
+
+ c = (u4)crc;
+ c = ~c;
+ while (len && ((ptrdiff_t)buf & 3)) {
+ c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
+ len--;
+ }
+
+ buf4 = (const u4 FAR *)(const void FAR *)buf;
+ while (len >= 32) {
+ DOLIT32;
+ len -= 32;
+ }
+ while (len >= 4) {
+ DOLIT4;
+ len -= 4;
+ }
+ buf = (const unsigned char FAR *)buf4;
+
+ if (len) do {
+ c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
+ } while (--len);
+ c = ~c;
+ return (unsigned long)c;
+}
+
+/* ========================================================================= */
+#define DOBIG4 c ^= *++buf4; \
+ c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
+ crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
+#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
+
+/* ========================================================================= */
+local unsigned long crc32_big(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ unsigned len;
+{
+ register u4 c;
+ register const u4 FAR *buf4;
+
+ c = REV((u4)crc);
+ c = ~c;
+ while (len && ((ptrdiff_t)buf & 3)) {
+ c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
+ len--;
+ }
+
+ buf4 = (const u4 FAR *)(const void FAR *)buf;
+ buf4--;
+ while (len >= 32) {
+ DOBIG32;
+ len -= 32;
+ }
+ while (len >= 4) {
+ DOBIG4;
+ len -= 4;
+ }
+ buf4++;
+ buf = (const unsigned char FAR *)buf4;
+
+ if (len) do {
+ c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
+ } while (--len);
+ c = ~c;
+ return (unsigned long)(REV(c));
+}
+
+#endif /* BYFOUR */
+
+#define GF2_DIM 32 /* dimension of GF(2) vectors (length of CRC) */
+
+/* ========================================================================= */
+local unsigned long gf2_matrix_times(mat, vec)
+ unsigned long *mat;
+ unsigned long vec;
+{
+ unsigned long sum;
+
+ sum = 0;
+ while (vec) {
+ if (vec & 1)
+ sum ^= *mat;
+ vec >>= 1;
+ mat++;
+ }
+ return sum;
+}
+
+/* ========================================================================= */
+local void gf2_matrix_square(square, mat)
+ unsigned long *square;
+ unsigned long *mat;
+{
+ int n;
+
+ for (n = 0; n < GF2_DIM; n++)
+ square[n] = gf2_matrix_times(mat, mat[n]);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT crc32_combine(crc1, crc2, len2)
+ uLong crc1;
+ uLong crc2;
+ z_off_t len2;
+{
+ int n;
+ unsigned long row;
+ unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */
+ unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */
+
+ /* degenerate case */
+ if (len2 == 0)
+ return crc1;
+
+ /* put operator for one zero bit in odd */
+ odd[0] = 0xedb88320L; /* CRC-32 polynomial */
+ row = 1;
+ for (n = 1; n < GF2_DIM; n++) {
+ odd[n] = row;
+ row <<= 1;
+ }
+
+ /* put operator for two zero bits in even */
+ gf2_matrix_square(even, odd);
+
+ /* put operator for four zero bits in odd */
+ gf2_matrix_square(odd, even);
+
+ /* apply len2 zeros to crc1 (first square will put the operator for one
+ zero byte, eight zero bits, in even) */
+ do {
+ /* apply zeros operator for this bit of len2 */
+ gf2_matrix_square(even, odd);
+ if (len2 & 1)
+ crc1 = gf2_matrix_times(even, crc1);
+ len2 >>= 1;
+
+ /* if no more bits set, then done */
+ if (len2 == 0)
+ break;
+
+ /* another iteration of the loop with odd and even swapped */
+ gf2_matrix_square(odd, even);
+ if (len2 & 1)
+ crc1 = gf2_matrix_times(odd, crc1);
+ len2 >>= 1;
+
+ /* if no more bits set, then done */
+ } while (len2 != 0);
+
+ /* return combined crc */
+ crc1 ^= crc2;
+ return crc1;
+}
--- /dev/null
+/* crc32.h -- tables for rapid CRC calculation
+ * Generated automatically by crc32.c
+ */
+
+local const unsigned long FAR crc_table[TBLS][256] =
+{
+ {
+ 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
+ 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
+ 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
+ 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
+ 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
+ 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
+ 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
+ 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
+ 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
+ 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
+ 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
+ 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
+ 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
+ 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
+ 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
+ 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
+ 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
+ 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
+ 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
+ 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
+ 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
+ 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
+ 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
+ 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
+ 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
+ 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
+ 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
+ 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
+ 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
+ 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
+ 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
+ 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
+ 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
+ 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
+ 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
+ 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
+ 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
+ 0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
+ 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
+ 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
+ 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
+ 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
+ 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
+ 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
+ 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
+ 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
+ 0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
+ 0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
+ 0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
+ 0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
+ 0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
+ 0x2d02ef8dUL
+#ifdef BYFOUR
+ },
+ {
+ 0x00000000UL, 0x191b3141UL, 0x32366282UL, 0x2b2d53c3UL, 0x646cc504UL,
+ 0x7d77f445UL, 0x565aa786UL, 0x4f4196c7UL, 0xc8d98a08UL, 0xd1c2bb49UL,
+ 0xfaefe88aUL, 0xe3f4d9cbUL, 0xacb54f0cUL, 0xb5ae7e4dUL, 0x9e832d8eUL,
+ 0x87981ccfUL, 0x4ac21251UL, 0x53d92310UL, 0x78f470d3UL, 0x61ef4192UL,
+ 0x2eaed755UL, 0x37b5e614UL, 0x1c98b5d7UL, 0x05838496UL, 0x821b9859UL,
+ 0x9b00a918UL, 0xb02dfadbUL, 0xa936cb9aUL, 0xe6775d5dUL, 0xff6c6c1cUL,
+ 0xd4413fdfUL, 0xcd5a0e9eUL, 0x958424a2UL, 0x8c9f15e3UL, 0xa7b24620UL,
+ 0xbea97761UL, 0xf1e8e1a6UL, 0xe8f3d0e7UL, 0xc3de8324UL, 0xdac5b265UL,
+ 0x5d5daeaaUL, 0x44469febUL, 0x6f6bcc28UL, 0x7670fd69UL, 0x39316baeUL,
+ 0x202a5aefUL, 0x0b07092cUL, 0x121c386dUL, 0xdf4636f3UL, 0xc65d07b2UL,
+ 0xed705471UL, 0xf46b6530UL, 0xbb2af3f7UL, 0xa231c2b6UL, 0x891c9175UL,
+ 0x9007a034UL, 0x179fbcfbUL, 0x0e848dbaUL, 0x25a9de79UL, 0x3cb2ef38UL,
+ 0x73f379ffUL, 0x6ae848beUL, 0x41c51b7dUL, 0x58de2a3cUL, 0xf0794f05UL,
+ 0xe9627e44UL, 0xc24f2d87UL, 0xdb541cc6UL, 0x94158a01UL, 0x8d0ebb40UL,
+ 0xa623e883UL, 0xbf38d9c2UL, 0x38a0c50dUL, 0x21bbf44cUL, 0x0a96a78fUL,
+ 0x138d96ceUL, 0x5ccc0009UL, 0x45d73148UL, 0x6efa628bUL, 0x77e153caUL,
+ 0xbabb5d54UL, 0xa3a06c15UL, 0x888d3fd6UL, 0x91960e97UL, 0xded79850UL,
+ 0xc7cca911UL, 0xece1fad2UL, 0xf5facb93UL, 0x7262d75cUL, 0x6b79e61dUL,
+ 0x4054b5deUL, 0x594f849fUL, 0x160e1258UL, 0x0f152319UL, 0x243870daUL,
+ 0x3d23419bUL, 0x65fd6ba7UL, 0x7ce65ae6UL, 0x57cb0925UL, 0x4ed03864UL,
+ 0x0191aea3UL, 0x188a9fe2UL, 0x33a7cc21UL, 0x2abcfd60UL, 0xad24e1afUL,
+ 0xb43fd0eeUL, 0x9f12832dUL, 0x8609b26cUL, 0xc94824abUL, 0xd05315eaUL,
+ 0xfb7e4629UL, 0xe2657768UL, 0x2f3f79f6UL, 0x362448b7UL, 0x1d091b74UL,
+ 0x04122a35UL, 0x4b53bcf2UL, 0x52488db3UL, 0x7965de70UL, 0x607eef31UL,
+ 0xe7e6f3feUL, 0xfefdc2bfUL, 0xd5d0917cUL, 0xcccba03dUL, 0x838a36faUL,
+ 0x9a9107bbUL, 0xb1bc5478UL, 0xa8a76539UL, 0x3b83984bUL, 0x2298a90aUL,
+ 0x09b5fac9UL, 0x10aecb88UL, 0x5fef5d4fUL, 0x46f46c0eUL, 0x6dd93fcdUL,
+ 0x74c20e8cUL, 0xf35a1243UL, 0xea412302UL, 0xc16c70c1UL, 0xd8774180UL,
+ 0x9736d747UL, 0x8e2de606UL, 0xa500b5c5UL, 0xbc1b8484UL, 0x71418a1aUL,
+ 0x685abb5bUL, 0x4377e898UL, 0x5a6cd9d9UL, 0x152d4f1eUL, 0x0c367e5fUL,
+ 0x271b2d9cUL, 0x3e001cddUL, 0xb9980012UL, 0xa0833153UL, 0x8bae6290UL,
+ 0x92b553d1UL, 0xddf4c516UL, 0xc4eff457UL, 0xefc2a794UL, 0xf6d996d5UL,
+ 0xae07bce9UL, 0xb71c8da8UL, 0x9c31de6bUL, 0x852aef2aUL, 0xca6b79edUL,
+ 0xd37048acUL, 0xf85d1b6fUL, 0xe1462a2eUL, 0x66de36e1UL, 0x7fc507a0UL,
+ 0x54e85463UL, 0x4df36522UL, 0x02b2f3e5UL, 0x1ba9c2a4UL, 0x30849167UL,
+ 0x299fa026UL, 0xe4c5aeb8UL, 0xfdde9ff9UL, 0xd6f3cc3aUL, 0xcfe8fd7bUL,
+ 0x80a96bbcUL, 0x99b25afdUL, 0xb29f093eUL, 0xab84387fUL, 0x2c1c24b0UL,
+ 0x350715f1UL, 0x1e2a4632UL, 0x07317773UL, 0x4870e1b4UL, 0x516bd0f5UL,
+ 0x7a468336UL, 0x635db277UL, 0xcbfad74eUL, 0xd2e1e60fUL, 0xf9ccb5ccUL,
+ 0xe0d7848dUL, 0xaf96124aUL, 0xb68d230bUL, 0x9da070c8UL, 0x84bb4189UL,
+ 0x03235d46UL, 0x1a386c07UL, 0x31153fc4UL, 0x280e0e85UL, 0x674f9842UL,
+ 0x7e54a903UL, 0x5579fac0UL, 0x4c62cb81UL, 0x8138c51fUL, 0x9823f45eUL,
+ 0xb30ea79dUL, 0xaa1596dcUL, 0xe554001bUL, 0xfc4f315aUL, 0xd7626299UL,
+ 0xce7953d8UL, 0x49e14f17UL, 0x50fa7e56UL, 0x7bd72d95UL, 0x62cc1cd4UL,
+ 0x2d8d8a13UL, 0x3496bb52UL, 0x1fbbe891UL, 0x06a0d9d0UL, 0x5e7ef3ecUL,
+ 0x4765c2adUL, 0x6c48916eUL, 0x7553a02fUL, 0x3a1236e8UL, 0x230907a9UL,
+ 0x0824546aUL, 0x113f652bUL, 0x96a779e4UL, 0x8fbc48a5UL, 0xa4911b66UL,
+ 0xbd8a2a27UL, 0xf2cbbce0UL, 0xebd08da1UL, 0xc0fdde62UL, 0xd9e6ef23UL,
+ 0x14bce1bdUL, 0x0da7d0fcUL, 0x268a833fUL, 0x3f91b27eUL, 0x70d024b9UL,
+ 0x69cb15f8UL, 0x42e6463bUL, 0x5bfd777aUL, 0xdc656bb5UL, 0xc57e5af4UL,
+ 0xee530937UL, 0xf7483876UL, 0xb809aeb1UL, 0xa1129ff0UL, 0x8a3fcc33UL,
+ 0x9324fd72UL
+ },
+ {
+ 0x00000000UL, 0x01c26a37UL, 0x0384d46eUL, 0x0246be59UL, 0x0709a8dcUL,
+ 0x06cbc2ebUL, 0x048d7cb2UL, 0x054f1685UL, 0x0e1351b8UL, 0x0fd13b8fUL,
+ 0x0d9785d6UL, 0x0c55efe1UL, 0x091af964UL, 0x08d89353UL, 0x0a9e2d0aUL,
+ 0x0b5c473dUL, 0x1c26a370UL, 0x1de4c947UL, 0x1fa2771eUL, 0x1e601d29UL,
+ 0x1b2f0bacUL, 0x1aed619bUL, 0x18abdfc2UL, 0x1969b5f5UL, 0x1235f2c8UL,
+ 0x13f798ffUL, 0x11b126a6UL, 0x10734c91UL, 0x153c5a14UL, 0x14fe3023UL,
+ 0x16b88e7aUL, 0x177ae44dUL, 0x384d46e0UL, 0x398f2cd7UL, 0x3bc9928eUL,
+ 0x3a0bf8b9UL, 0x3f44ee3cUL, 0x3e86840bUL, 0x3cc03a52UL, 0x3d025065UL,
+ 0x365e1758UL, 0x379c7d6fUL, 0x35dac336UL, 0x3418a901UL, 0x3157bf84UL,
+ 0x3095d5b3UL, 0x32d36beaUL, 0x331101ddUL, 0x246be590UL, 0x25a98fa7UL,
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+ 0xc9fab509UL, 0x88cbae10UL, 0x4f5def5fUL, 0x0e6cf446UL, 0xcd3fd96dUL,
+ 0x8c0ec274UL, 0x43125af3UL, 0x022341eaUL, 0xc1706cc1UL, 0x804177d8UL,
+ 0x47d73697UL, 0x06e62d8eUL, 0xc5b500a5UL, 0x84841bbcUL, 0x1a8a4171UL,
+ 0x5bbb5a68UL, 0x98e87743UL, 0xd9d96c5aUL, 0x1e4f2d15UL, 0x5f7e360cUL,
+ 0x9c2d1b27UL, 0xdd1c003eUL, 0x120098b9UL, 0x533183a0UL, 0x9062ae8bUL,
+ 0xd153b592UL, 0x16c5f4ddUL, 0x57f4efc4UL, 0x94a7c2efUL, 0xd596d9f6UL,
+ 0xe9bc07aeUL, 0xa88d1cb7UL, 0x6bde319cUL, 0x2aef2a85UL, 0xed796bcaUL,
+ 0xac4870d3UL, 0x6f1b5df8UL, 0x2e2a46e1UL, 0xe136de66UL, 0xa007c57fUL,
+ 0x6354e854UL, 0x2265f34dUL, 0xe5f3b202UL, 0xa4c2a91bUL, 0x67918430UL,
+ 0x26a09f29UL, 0xb8aec5e4UL, 0xf99fdefdUL, 0x3accf3d6UL, 0x7bfde8cfUL,
+ 0xbc6ba980UL, 0xfd5ab299UL, 0x3e099fb2UL, 0x7f3884abUL, 0xb0241c2cUL,
+ 0xf1150735UL, 0x32462a1eUL, 0x73773107UL, 0xb4e17048UL, 0xf5d06b51UL,
+ 0x3683467aUL, 0x77b25d63UL, 0x4ed7facbUL, 0x0fe6e1d2UL, 0xccb5ccf9UL,
+ 0x8d84d7e0UL, 0x4a1296afUL, 0x0b238db6UL, 0xc870a09dUL, 0x8941bb84UL,
+ 0x465d2303UL, 0x076c381aUL, 0xc43f1531UL, 0x850e0e28UL, 0x42984f67UL,
+ 0x03a9547eUL, 0xc0fa7955UL, 0x81cb624cUL, 0x1fc53881UL, 0x5ef42398UL,
+ 0x9da70eb3UL, 0xdc9615aaUL, 0x1b0054e5UL, 0x5a314ffcUL, 0x996262d7UL,
+ 0xd85379ceUL, 0x174fe149UL, 0x567efa50UL, 0x952dd77bUL, 0xd41ccc62UL,
+ 0x138a8d2dUL, 0x52bb9634UL, 0x91e8bb1fUL, 0xd0d9a006UL, 0xecf37e5eUL,
+ 0xadc26547UL, 0x6e91486cUL, 0x2fa05375UL, 0xe836123aUL, 0xa9070923UL,
+ 0x6a542408UL, 0x2b653f11UL, 0xe479a796UL, 0xa548bc8fUL, 0x661b91a4UL,
+ 0x272a8abdUL, 0xe0bccbf2UL, 0xa18dd0ebUL, 0x62defdc0UL, 0x23efe6d9UL,
+ 0xbde1bc14UL, 0xfcd0a70dUL, 0x3f838a26UL, 0x7eb2913fUL, 0xb924d070UL,
+ 0xf815cb69UL, 0x3b46e642UL, 0x7a77fd5bUL, 0xb56b65dcUL, 0xf45a7ec5UL,
+ 0x370953eeUL, 0x763848f7UL, 0xb1ae09b8UL, 0xf09f12a1UL, 0x33cc3f8aUL,
+ 0x72fd2493UL
+ },
+ {
+ 0x00000000UL, 0x376ac201UL, 0x6ed48403UL, 0x59be4602UL, 0xdca80907UL,
+ 0xebc2cb06UL, 0xb27c8d04UL, 0x85164f05UL, 0xb851130eUL, 0x8f3bd10fUL,
+ 0xd685970dUL, 0xe1ef550cUL, 0x64f91a09UL, 0x5393d808UL, 0x0a2d9e0aUL,
+ 0x3d475c0bUL, 0x70a3261cUL, 0x47c9e41dUL, 0x1e77a21fUL, 0x291d601eUL,
+ 0xac0b2f1bUL, 0x9b61ed1aUL, 0xc2dfab18UL, 0xf5b56919UL, 0xc8f23512UL,
+ 0xff98f713UL, 0xa626b111UL, 0x914c7310UL, 0x145a3c15UL, 0x2330fe14UL,
+ 0x7a8eb816UL, 0x4de47a17UL, 0xe0464d38UL, 0xd72c8f39UL, 0x8e92c93bUL,
+ 0xb9f80b3aUL, 0x3cee443fUL, 0x0b84863eUL, 0x523ac03cUL, 0x6550023dUL,
+ 0x58175e36UL, 0x6f7d9c37UL, 0x36c3da35UL, 0x01a91834UL, 0x84bf5731UL,
+ 0xb3d59530UL, 0xea6bd332UL, 0xdd011133UL, 0x90e56b24UL, 0xa78fa925UL,
+ 0xfe31ef27UL, 0xc95b2d26UL, 0x4c4d6223UL, 0x7b27a022UL, 0x2299e620UL,
+ 0x15f32421UL, 0x28b4782aUL, 0x1fdeba2bUL, 0x4660fc29UL, 0x710a3e28UL,
+ 0xf41c712dUL, 0xc376b32cUL, 0x9ac8f52eUL, 0xada2372fUL, 0xc08d9a70UL,
+ 0xf7e75871UL, 0xae591e73UL, 0x9933dc72UL, 0x1c259377UL, 0x2b4f5176UL,
+ 0x72f11774UL, 0x459bd575UL, 0x78dc897eUL, 0x4fb64b7fUL, 0x16080d7dUL,
+ 0x2162cf7cUL, 0xa4748079UL, 0x931e4278UL, 0xcaa0047aUL, 0xfdcac67bUL,
+ 0xb02ebc6cUL, 0x87447e6dUL, 0xdefa386fUL, 0xe990fa6eUL, 0x6c86b56bUL,
+ 0x5bec776aUL, 0x02523168UL, 0x3538f369UL, 0x087faf62UL, 0x3f156d63UL,
+ 0x66ab2b61UL, 0x51c1e960UL, 0xd4d7a665UL, 0xe3bd6464UL, 0xba032266UL,
+ 0x8d69e067UL, 0x20cbd748UL, 0x17a11549UL, 0x4e1f534bUL, 0x7975914aUL,
+ 0xfc63de4fUL, 0xcb091c4eUL, 0x92b75a4cUL, 0xa5dd984dUL, 0x989ac446UL,
+ 0xaff00647UL, 0xf64e4045UL, 0xc1248244UL, 0x4432cd41UL, 0x73580f40UL,
+ 0x2ae64942UL, 0x1d8c8b43UL, 0x5068f154UL, 0x67023355UL, 0x3ebc7557UL,
+ 0x09d6b756UL, 0x8cc0f853UL, 0xbbaa3a52UL, 0xe2147c50UL, 0xd57ebe51UL,
+ 0xe839e25aUL, 0xdf53205bUL, 0x86ed6659UL, 0xb187a458UL, 0x3491eb5dUL,
+ 0x03fb295cUL, 0x5a456f5eUL, 0x6d2fad5fUL, 0x801b35e1UL, 0xb771f7e0UL,
+ 0xeecfb1e2UL, 0xd9a573e3UL, 0x5cb33ce6UL, 0x6bd9fee7UL, 0x3267b8e5UL,
+ 0x050d7ae4UL, 0x384a26efUL, 0x0f20e4eeUL, 0x569ea2ecUL, 0x61f460edUL,
+ 0xe4e22fe8UL, 0xd388ede9UL, 0x8a36abebUL, 0xbd5c69eaUL, 0xf0b813fdUL,
+ 0xc7d2d1fcUL, 0x9e6c97feUL, 0xa90655ffUL, 0x2c101afaUL, 0x1b7ad8fbUL,
+ 0x42c49ef9UL, 0x75ae5cf8UL, 0x48e900f3UL, 0x7f83c2f2UL, 0x263d84f0UL,
+ 0x115746f1UL, 0x944109f4UL, 0xa32bcbf5UL, 0xfa958df7UL, 0xcdff4ff6UL,
+ 0x605d78d9UL, 0x5737bad8UL, 0x0e89fcdaUL, 0x39e33edbUL, 0xbcf571deUL,
+ 0x8b9fb3dfUL, 0xd221f5ddUL, 0xe54b37dcUL, 0xd80c6bd7UL, 0xef66a9d6UL,
+ 0xb6d8efd4UL, 0x81b22dd5UL, 0x04a462d0UL, 0x33cea0d1UL, 0x6a70e6d3UL,
+ 0x5d1a24d2UL, 0x10fe5ec5UL, 0x27949cc4UL, 0x7e2adac6UL, 0x494018c7UL,
+ 0xcc5657c2UL, 0xfb3c95c3UL, 0xa282d3c1UL, 0x95e811c0UL, 0xa8af4dcbUL,
+ 0x9fc58fcaUL, 0xc67bc9c8UL, 0xf1110bc9UL, 0x740744ccUL, 0x436d86cdUL,
+ 0x1ad3c0cfUL, 0x2db902ceUL, 0x4096af91UL, 0x77fc6d90UL, 0x2e422b92UL,
+ 0x1928e993UL, 0x9c3ea696UL, 0xab546497UL, 0xf2ea2295UL, 0xc580e094UL,
+ 0xf8c7bc9fUL, 0xcfad7e9eUL, 0x9613389cUL, 0xa179fa9dUL, 0x246fb598UL,
+ 0x13057799UL, 0x4abb319bUL, 0x7dd1f39aUL, 0x3035898dUL, 0x075f4b8cUL,
+ 0x5ee10d8eUL, 0x698bcf8fUL, 0xec9d808aUL, 0xdbf7428bUL, 0x82490489UL,
+ 0xb523c688UL, 0x88649a83UL, 0xbf0e5882UL, 0xe6b01e80UL, 0xd1dadc81UL,
+ 0x54cc9384UL, 0x63a65185UL, 0x3a181787UL, 0x0d72d586UL, 0xa0d0e2a9UL,
+ 0x97ba20a8UL, 0xce0466aaUL, 0xf96ea4abUL, 0x7c78ebaeUL, 0x4b1229afUL,
+ 0x12ac6fadUL, 0x25c6adacUL, 0x1881f1a7UL, 0x2feb33a6UL, 0x765575a4UL,
+ 0x413fb7a5UL, 0xc429f8a0UL, 0xf3433aa1UL, 0xaafd7ca3UL, 0x9d97bea2UL,
+ 0xd073c4b5UL, 0xe71906b4UL, 0xbea740b6UL, 0x89cd82b7UL, 0x0cdbcdb2UL,
+ 0x3bb10fb3UL, 0x620f49b1UL, 0x55658bb0UL, 0x6822d7bbUL, 0x5f4815baUL,
+ 0x06f653b8UL, 0x319c91b9UL, 0xb48adebcUL, 0x83e01cbdUL, 0xda5e5abfUL,
+ 0xed3498beUL
+ },
+ {
+ 0x00000000UL, 0x6567bcb8UL, 0x8bc809aaUL, 0xeeafb512UL, 0x5797628fUL,
+ 0x32f0de37UL, 0xdc5f6b25UL, 0xb938d79dUL, 0xef28b4c5UL, 0x8a4f087dUL,
+ 0x64e0bd6fUL, 0x018701d7UL, 0xb8bfd64aUL, 0xddd86af2UL, 0x3377dfe0UL,
+ 0x56106358UL, 0x9f571950UL, 0xfa30a5e8UL, 0x149f10faUL, 0x71f8ac42UL,
+ 0xc8c07bdfUL, 0xada7c767UL, 0x43087275UL, 0x266fcecdUL, 0x707fad95UL,
+ 0x1518112dUL, 0xfbb7a43fUL, 0x9ed01887UL, 0x27e8cf1aUL, 0x428f73a2UL,
+ 0xac20c6b0UL, 0xc9477a08UL, 0x3eaf32a0UL, 0x5bc88e18UL, 0xb5673b0aUL,
+ 0xd00087b2UL, 0x6938502fUL, 0x0c5fec97UL, 0xe2f05985UL, 0x8797e53dUL,
+ 0xd1878665UL, 0xb4e03addUL, 0x5a4f8fcfUL, 0x3f283377UL, 0x8610e4eaUL,
+ 0xe3775852UL, 0x0dd8ed40UL, 0x68bf51f8UL, 0xa1f82bf0UL, 0xc49f9748UL,
+ 0x2a30225aUL, 0x4f579ee2UL, 0xf66f497fUL, 0x9308f5c7UL, 0x7da740d5UL,
+ 0x18c0fc6dUL, 0x4ed09f35UL, 0x2bb7238dUL, 0xc518969fUL, 0xa07f2a27UL,
+ 0x1947fdbaUL, 0x7c204102UL, 0x928ff410UL, 0xf7e848a8UL, 0x3d58149bUL,
+ 0x583fa823UL, 0xb6901d31UL, 0xd3f7a189UL, 0x6acf7614UL, 0x0fa8caacUL,
+ 0xe1077fbeUL, 0x8460c306UL, 0xd270a05eUL, 0xb7171ce6UL, 0x59b8a9f4UL,
+ 0x3cdf154cUL, 0x85e7c2d1UL, 0xe0807e69UL, 0x0e2fcb7bUL, 0x6b4877c3UL,
+ 0xa20f0dcbUL, 0xc768b173UL, 0x29c70461UL, 0x4ca0b8d9UL, 0xf5986f44UL,
+ 0x90ffd3fcUL, 0x7e5066eeUL, 0x1b37da56UL, 0x4d27b90eUL, 0x284005b6UL,
+ 0xc6efb0a4UL, 0xa3880c1cUL, 0x1ab0db81UL, 0x7fd76739UL, 0x9178d22bUL,
+ 0xf41f6e93UL, 0x03f7263bUL, 0x66909a83UL, 0x883f2f91UL, 0xed589329UL,
+ 0x546044b4UL, 0x3107f80cUL, 0xdfa84d1eUL, 0xbacff1a6UL, 0xecdf92feUL,
+ 0x89b82e46UL, 0x67179b54UL, 0x027027ecUL, 0xbb48f071UL, 0xde2f4cc9UL,
+ 0x3080f9dbUL, 0x55e74563UL, 0x9ca03f6bUL, 0xf9c783d3UL, 0x176836c1UL,
+ 0x720f8a79UL, 0xcb375de4UL, 0xae50e15cUL, 0x40ff544eUL, 0x2598e8f6UL,
+ 0x73888baeUL, 0x16ef3716UL, 0xf8408204UL, 0x9d273ebcUL, 0x241fe921UL,
+ 0x41785599UL, 0xafd7e08bUL, 0xcab05c33UL, 0x3bb659edUL, 0x5ed1e555UL,
+ 0xb07e5047UL, 0xd519ecffUL, 0x6c213b62UL, 0x094687daUL, 0xe7e932c8UL,
+ 0x828e8e70UL, 0xd49eed28UL, 0xb1f95190UL, 0x5f56e482UL, 0x3a31583aUL,
+ 0x83098fa7UL, 0xe66e331fUL, 0x08c1860dUL, 0x6da63ab5UL, 0xa4e140bdUL,
+ 0xc186fc05UL, 0x2f294917UL, 0x4a4ef5afUL, 0xf3762232UL, 0x96119e8aUL,
+ 0x78be2b98UL, 0x1dd99720UL, 0x4bc9f478UL, 0x2eae48c0UL, 0xc001fdd2UL,
+ 0xa566416aUL, 0x1c5e96f7UL, 0x79392a4fUL, 0x97969f5dUL, 0xf2f123e5UL,
+ 0x05196b4dUL, 0x607ed7f5UL, 0x8ed162e7UL, 0xebb6de5fUL, 0x528e09c2UL,
+ 0x37e9b57aUL, 0xd9460068UL, 0xbc21bcd0UL, 0xea31df88UL, 0x8f566330UL,
+ 0x61f9d622UL, 0x049e6a9aUL, 0xbda6bd07UL, 0xd8c101bfUL, 0x366eb4adUL,
+ 0x53090815UL, 0x9a4e721dUL, 0xff29cea5UL, 0x11867bb7UL, 0x74e1c70fUL,
+ 0xcdd91092UL, 0xa8beac2aUL, 0x46111938UL, 0x2376a580UL, 0x7566c6d8UL,
+ 0x10017a60UL, 0xfeaecf72UL, 0x9bc973caUL, 0x22f1a457UL, 0x479618efUL,
+ 0xa939adfdUL, 0xcc5e1145UL, 0x06ee4d76UL, 0x6389f1ceUL, 0x8d2644dcUL,
+ 0xe841f864UL, 0x51792ff9UL, 0x341e9341UL, 0xdab12653UL, 0xbfd69aebUL,
+ 0xe9c6f9b3UL, 0x8ca1450bUL, 0x620ef019UL, 0x07694ca1UL, 0xbe519b3cUL,
+ 0xdb362784UL, 0x35999296UL, 0x50fe2e2eUL, 0x99b95426UL, 0xfcdee89eUL,
+ 0x12715d8cUL, 0x7716e134UL, 0xce2e36a9UL, 0xab498a11UL, 0x45e63f03UL,
+ 0x208183bbUL, 0x7691e0e3UL, 0x13f65c5bUL, 0xfd59e949UL, 0x983e55f1UL,
+ 0x2106826cUL, 0x44613ed4UL, 0xaace8bc6UL, 0xcfa9377eUL, 0x38417fd6UL,
+ 0x5d26c36eUL, 0xb389767cUL, 0xd6eecac4UL, 0x6fd61d59UL, 0x0ab1a1e1UL,
+ 0xe41e14f3UL, 0x8179a84bUL, 0xd769cb13UL, 0xb20e77abUL, 0x5ca1c2b9UL,
+ 0x39c67e01UL, 0x80fea99cUL, 0xe5991524UL, 0x0b36a036UL, 0x6e511c8eUL,
+ 0xa7166686UL, 0xc271da3eUL, 0x2cde6f2cUL, 0x49b9d394UL, 0xf0810409UL,
+ 0x95e6b8b1UL, 0x7b490da3UL, 0x1e2eb11bUL, 0x483ed243UL, 0x2d596efbUL,
+ 0xc3f6dbe9UL, 0xa6916751UL, 0x1fa9b0ccUL, 0x7ace0c74UL, 0x9461b966UL,
+ 0xf10605deUL
+#endif
+ }
+};
--- /dev/null
+/* deflate.c -- compress data using the deflation algorithm
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * ALGORITHM
+ *
+ * The "deflation" process depends on being able to identify portions
+ * of the input text which are identical to earlier input (within a
+ * sliding window trailing behind the input currently being processed).
+ *
+ * The most straightforward technique turns out to be the fastest for
+ * most input files: try all possible matches and select the longest.
+ * The key feature of this algorithm is that insertions into the string
+ * dictionary are very simple and thus fast, and deletions are avoided
+ * completely. Insertions are performed at each input character, whereas
+ * string matches are performed only when the previous match ends. So it
+ * is preferable to spend more time in matches to allow very fast string
+ * insertions and avoid deletions. The matching algorithm for small
+ * strings is inspired from that of Rabin & Karp. A brute force approach
+ * is used to find longer strings when a small match has been found.
+ * A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
+ * (by Leonid Broukhis).
+ * A previous version of this file used a more sophisticated algorithm
+ * (by Fiala and Greene) which is guaranteed to run in linear amortized
+ * time, but has a larger average cost, uses more memory and is patented.
+ * However the F&G algorithm may be faster for some highly redundant
+ * files if the parameter max_chain_length (described below) is too large.
+ *
+ * ACKNOWLEDGEMENTS
+ *
+ * The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
+ * I found it in 'freeze' written by Leonid Broukhis.
+ * Thanks to many people for bug reports and testing.
+ *
+ * REFERENCES
+ *
+ * Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
+ * Available in http://www.ietf.org/rfc/rfc1951.txt
+ *
+ * A description of the Rabin and Karp algorithm is given in the book
+ * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
+ *
+ * Fiala,E.R., and Greene,D.H.
+ * Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
+ *
+ */
+
+/* @(#) $Id$ */
+
+#include "deflate.h"
+
+const char deflate_copyright[] =
+ " deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly ";
+/*
+ If you use the zlib library in a product, an acknowledgment is welcome
+ in the documentation of your product. If for some reason you cannot
+ include such an acknowledgment, I would appreciate that you keep this
+ copyright string in the executable of your product.
+ */
+
+/* ===========================================================================
+ * Function prototypes.
+ */
+typedef enum {
+ need_more, /* block not completed, need more input or more output */
+ block_done, /* block flush performed */
+ finish_started, /* finish started, need only more output at next deflate */
+ finish_done /* finish done, accept no more input or output */
+} block_state;
+
+typedef block_state (*compress_func) OF((deflate_state *s, int flush));
+/* Compression function. Returns the block state after the call. */
+
+local void fill_window OF((deflate_state *s));
+local block_state deflate_stored OF((deflate_state *s, int flush));
+local block_state deflate_fast OF((deflate_state *s, int flush));
+#ifndef FASTEST
+local block_state deflate_slow OF((deflate_state *s, int flush));
+#endif
+local void lm_init OF((deflate_state *s));
+local void putShortMSB OF((deflate_state *s, uInt b));
+local void flush_pending OF((z_streamp strm));
+local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
+#ifndef FASTEST
+#ifdef ASMV
+ void match_init OF((void)); /* asm code initialization */
+ uInt longest_match OF((deflate_state *s, IPos cur_match));
+#else
+local uInt longest_match OF((deflate_state *s, IPos cur_match));
+#endif
+#endif
+local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));
+
+#ifdef DEBUG
+local void check_match OF((deflate_state *s, IPos start, IPos match,
+ int length));
+#endif
+
+/* ===========================================================================
+ * Local data
+ */
+
+#define NIL 0
+/* Tail of hash chains */
+
+#ifndef TOO_FAR
+# define TOO_FAR 4096
+#endif
+/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+/* Values for max_lazy_match, good_match and max_chain_length, depending on
+ * the desired pack level (0..9). The values given below have been tuned to
+ * exclude worst case performance for pathological files. Better values may be
+ * found for specific files.
+ */
+typedef struct config_s {
+ ush good_length; /* reduce lazy search above this match length */
+ ush max_lazy; /* do not perform lazy search above this match length */
+ ush nice_length; /* quit search above this match length */
+ ush max_chain;
+ compress_func func;
+} config;
+
+#ifdef FASTEST
+local const config configuration_table[2] = {
+/* good lazy nice chain */
+/* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */
+/* 1 */ {4, 4, 8, 4, deflate_fast}}; /* max speed, no lazy matches */
+#else
+local const config configuration_table[10] = {
+/* good lazy nice chain */
+/* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */
+/* 1 */ {4, 4, 8, 4, deflate_fast}, /* max speed, no lazy matches */
+/* 2 */ {4, 5, 16, 8, deflate_fast},
+/* 3 */ {4, 6, 32, 32, deflate_fast},
+
+/* 4 */ {4, 4, 16, 16, deflate_slow}, /* lazy matches */
+/* 5 */ {8, 16, 32, 32, deflate_slow},
+/* 6 */ {8, 16, 128, 128, deflate_slow},
+/* 7 */ {8, 32, 128, 256, deflate_slow},
+/* 8 */ {32, 128, 258, 1024, deflate_slow},
+/* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* max compression */
+#endif
+
+/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
+ * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
+ * meaning.
+ */
+
+#define EQUAL 0
+/* result of memcmp for equal strings */
+
+#ifndef NO_DUMMY_DECL
+struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
+#endif
+
+/* ===========================================================================
+ * Update a hash value with the given input byte
+ * IN assertion: all calls to to UPDATE_HASH are made with consecutive
+ * input characters, so that a running hash key can be computed from the
+ * previous key instead of complete recalculation each time.
+ */
+#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
+
+
+/* ===========================================================================
+ * Insert string str in the dictionary and set match_head to the previous head
+ * of the hash chain (the most recent string with same hash key). Return
+ * the previous length of the hash chain.
+ * If this file is compiled with -DFASTEST, the compression level is forced
+ * to 1, and no hash chains are maintained.
+ * IN assertion: all calls to to INSERT_STRING are made with consecutive
+ * input characters and the first MIN_MATCH bytes of str are valid
+ * (except for the last MIN_MATCH-1 bytes of the input file).
+ */
+#ifdef FASTEST
+#define INSERT_STRING(s, str, match_head) \
+ (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+ match_head = s->head[s->ins_h], \
+ s->head[s->ins_h] = (Pos)(str))
+#else
+#define INSERT_STRING(s, str, match_head) \
+ (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+ match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \
+ s->head[s->ins_h] = (Pos)(str))
+#endif
+
+/* ===========================================================================
+ * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
+ * prev[] will be initialized on the fly.
+ */
+#define CLEAR_HASH(s) \
+ s->head[s->hash_size-1] = NIL; \
+ zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+
+/* ========================================================================= */
+int ZEXPORT deflateInit_(strm, level, version, stream_size)
+ z_streamp strm;
+ int level;
+ const char *version;
+ int stream_size;
+{
+ return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
+ Z_DEFAULT_STRATEGY, version, stream_size);
+ /* To do: ignore strm->next_in if we use it as window */
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
+ version, stream_size)
+ z_streamp strm;
+ int level;
+ int method;
+ int windowBits;
+ int memLevel;
+ int strategy;
+ const char *version;
+ int stream_size;
+{
+ deflate_state *s;
+ int wrap = 1;
+ static const char my_version[] = ZLIB_VERSION;
+
+ ushf *overlay;
+ /* We overlay pending_buf and d_buf+l_buf. This works since the average
+ * output size for (length,distance) codes is <= 24 bits.
+ */
+
+ if (version == Z_NULL || version[0] != my_version[0] ||
+ stream_size != sizeof(z_stream)) {
+ return Z_VERSION_ERROR;
+ }
+ if (strm == Z_NULL) return Z_STREAM_ERROR;
+
+ strm->msg = Z_NULL;
+ if (strm->zalloc == (alloc_func)0) {
+ strm->zalloc = zcalloc;
+ strm->opaque = (voidpf)0;
+ }
+ if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+
+#ifdef FASTEST
+ if (level != 0) level = 1;
+#else
+ if (level == Z_DEFAULT_COMPRESSION) level = 6;
+#endif
+
+ if (windowBits < 0) { /* suppress zlib wrapper */
+ wrap = 0;
+ windowBits = -windowBits;
+ }
+#ifdef GZIP
+ else if (windowBits > 15) {
+ wrap = 2; /* write gzip wrapper instead */
+ windowBits -= 16;
+ }
+#endif
+ if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
+ windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
+ strategy < 0 || strategy > Z_FIXED) {
+ return Z_STREAM_ERROR;
+ }
+ if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */
+ s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
+ if (s == Z_NULL) return Z_MEM_ERROR;
+ strm->state = (struct internal_state FAR *)s;
+ s->strm = strm;
+
+ s->wrap = wrap;
+ s->gzhead = Z_NULL;
+ s->w_bits = windowBits;
+ s->w_size = 1 << s->w_bits;
+ s->w_mask = s->w_size - 1;
+
+ s->hash_bits = memLevel + 7;
+ s->hash_size = 1 << s->hash_bits;
+ s->hash_mask = s->hash_size - 1;
+ s->hash_shift = ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
+
+ s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte));
+ s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));
+ s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));
+
+ s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
+
+ overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
+ s->pending_buf = (uchf *) overlay;
+ s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
+
+ if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
+ s->pending_buf == Z_NULL) {
+ s->status = FINISH_STATE;
+ strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
+ deflateEnd (strm);
+ return Z_MEM_ERROR;
+ }
+ s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
+ s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
+
+ s->level = level;
+ s->strategy = strategy;
+ s->method = (Byte)method;
+
+ return deflateReset(strm);
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
+ z_streamp strm;
+ const Bytef *dictionary;
+ uInt dictLength;
+{
+ deflate_state *s;
+ uInt length = dictLength;
+ uInt n;
+ IPos hash_head = 0;
+
+ if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
+ strm->state->wrap == 2 ||
+ (strm->state->wrap == 1 && strm->state->status != INIT_STATE))
+ return Z_STREAM_ERROR;
+
+ s = strm->state;
+ if (s->wrap)
+ strm->adler = adler32(strm->adler, dictionary, dictLength);
+
+ if (length < MIN_MATCH) return Z_OK;
+ if (length > MAX_DIST(s)) {
+ length = MAX_DIST(s);
+ dictionary += dictLength - length; /* use the tail of the dictionary */
+ }
+ zmemcpy(s->window, dictionary, length);
+ s->strstart = length;
+ s->block_start = (long)length;
+
+ /* Insert all strings in the hash table (except for the last two bytes).
+ * s->lookahead stays null, so s->ins_h will be recomputed at the next
+ * call of fill_window.
+ */
+ s->ins_h = s->window[0];
+ UPDATE_HASH(s, s->ins_h, s->window[1]);
+ for (n = 0; n <= length - MIN_MATCH; n++) {
+ INSERT_STRING(s, n, hash_head);
+ }
+ if (hash_head) hash_head = 0; /* to make compiler happy */
+ return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateReset (strm)
+ z_streamp strm;
+{
+ deflate_state *s;
+
+ if (strm == Z_NULL || strm->state == Z_NULL ||
+ strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0) {
+ return Z_STREAM_ERROR;
+ }
+
+ strm->total_in = strm->total_out = 0;
+ strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */
+ strm->data_type = Z_UNKNOWN;
+
+ s = (deflate_state *)strm->state;
+ s->pending = 0;
+ s->pending_out = s->pending_buf;
+
+ if (s->wrap < 0) {
+ s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */
+ }
+ s->status = s->wrap ? INIT_STATE : BUSY_STATE;
+ strm->adler =
+#ifdef GZIP
+ s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
+#endif
+ adler32(0L, Z_NULL, 0);
+ s->last_flush = Z_NO_FLUSH;
+
+ _tr_init(s);
+ lm_init(s);
+
+ return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateSetHeader (strm, head)
+ z_streamp strm;
+ gz_headerp head;
+{
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (strm->state->wrap != 2) return Z_STREAM_ERROR;
+ strm->state->gzhead = head;
+ return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflatePrime (strm, bits, value)
+ z_streamp strm;
+ int bits;
+ int value;
+{
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ strm->state->bi_valid = bits;
+ strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
+ return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateParams(strm, level, strategy)
+ z_streamp strm;
+ int level;
+ int strategy;
+{
+ deflate_state *s;
+ compress_func func;
+ int err = Z_OK;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ s = strm->state;
+
+#ifdef FASTEST
+ if (level != 0) level = 1;
+#else
+ if (level == Z_DEFAULT_COMPRESSION) level = 6;
+#endif
+ if (level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) {
+ return Z_STREAM_ERROR;
+ }
+ func = configuration_table[s->level].func;
+
+ if (func != configuration_table[level].func && strm->total_in != 0) {
+ /* Flush the last buffer: */
+ err = deflate(strm, Z_PARTIAL_FLUSH);
+ }
+ if (s->level != level) {
+ s->level = level;
+ s->max_lazy_match = configuration_table[level].max_lazy;
+ s->good_match = configuration_table[level].good_length;
+ s->nice_match = configuration_table[level].nice_length;
+ s->max_chain_length = configuration_table[level].max_chain;
+ }
+ s->strategy = strategy;
+ return err;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
+ z_streamp strm;
+ int good_length;
+ int max_lazy;
+ int nice_length;
+ int max_chain;
+{
+ deflate_state *s;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ s = strm->state;
+ s->good_match = good_length;
+ s->max_lazy_match = max_lazy;
+ s->nice_match = nice_length;
+ s->max_chain_length = max_chain;
+ return Z_OK;
+}
+
+/* =========================================================================
+ * For the default windowBits of 15 and memLevel of 8, this function returns
+ * a close to exact, as well as small, upper bound on the compressed size.
+ * They are coded as constants here for a reason--if the #define's are
+ * changed, then this function needs to be changed as well. The return
+ * value for 15 and 8 only works for those exact settings.
+ *
+ * For any setting other than those defaults for windowBits and memLevel,
+ * the value returned is a conservative worst case for the maximum expansion
+ * resulting from using fixed blocks instead of stored blocks, which deflate
+ * can emit on compressed data for some combinations of the parameters.
+ *
+ * This function could be more sophisticated to provide closer upper bounds
+ * for every combination of windowBits and memLevel, as well as wrap.
+ * But even the conservative upper bound of about 14% expansion does not
+ * seem onerous for output buffer allocation.
+ */
+uLong ZEXPORT deflateBound(strm, sourceLen)
+ z_streamp strm;
+ uLong sourceLen;
+{
+ deflate_state *s;
+ uLong destLen;
+
+ /* conservative upper bound */
+ destLen = sourceLen +
+ ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
+
+ /* if can't get parameters, return conservative bound */
+ if (strm == Z_NULL || strm->state == Z_NULL)
+ return destLen;
+
+ /* if not default parameters, return conservative bound */
+ s = strm->state;
+ if (s->w_bits != 15 || s->hash_bits != 8 + 7)
+ return destLen;
+
+ /* default settings: return tight bound for that case */
+ return compressBound(sourceLen);
+}
+
+/* =========================================================================
+ * Put a short in the pending buffer. The 16-bit value is put in MSB order.
+ * IN assertion: the stream state is correct and there is enough room in
+ * pending_buf.
+ */
+local void putShortMSB (s, b)
+ deflate_state *s;
+ uInt b;
+{
+ put_byte(s, (Byte)(b >> 8));
+ put_byte(s, (Byte)(b & 0xff));
+}
+
+/* =========================================================================
+ * Flush as much pending output as possible. All deflate() output goes
+ * through this function so some applications may wish to modify it
+ * to avoid allocating a large strm->next_out buffer and copying into it.
+ * (See also read_buf()).
+ */
+local void flush_pending(strm)
+ z_streamp strm;
+{
+ unsigned len = strm->state->pending;
+
+ if (len > strm->avail_out) len = strm->avail_out;
+ if (len == 0) return;
+
+ zmemcpy(strm->next_out, strm->state->pending_out, len);
+ strm->next_out += len;
+ strm->state->pending_out += len;
+ strm->total_out += len;
+ strm->avail_out -= len;
+ strm->state->pending -= len;
+ if (strm->state->pending == 0) {
+ strm->state->pending_out = strm->state->pending_buf;
+ }
+}
+
+/* ========================================================================= */
+int ZEXPORT deflate (strm, flush)
+ z_streamp strm;
+ int flush;
+{
+ int old_flush; /* value of flush param for previous deflate call */
+ deflate_state *s;
+
+ if (strm == Z_NULL || strm->state == Z_NULL ||
+ flush > Z_FINISH || flush < 0) {
+ return Z_STREAM_ERROR;
+ }
+ s = strm->state;
+
+ if (strm->next_out == Z_NULL ||
+ (strm->next_in == Z_NULL && strm->avail_in != 0) ||
+ (s->status == FINISH_STATE && flush != Z_FINISH)) {
+ ERR_RETURN(strm, Z_STREAM_ERROR);
+ }
+ if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
+
+ s->strm = strm; /* just in case */
+ old_flush = s->last_flush;
+ s->last_flush = flush;
+
+ /* Write the header */
+ if (s->status == INIT_STATE) {
+#ifdef GZIP
+ if (s->wrap == 2) {
+ strm->adler = crc32(0L, Z_NULL, 0);
+ put_byte(s, 31);
+ put_byte(s, 139);
+ put_byte(s, 8);
+ if (s->gzhead == NULL) {
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, s->level == 9 ? 2 :
+ (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+ 4 : 0));
+ put_byte(s, OS_CODE);
+ s->status = BUSY_STATE;
+ }
+ else {
+ put_byte(s, (s->gzhead->text ? 1 : 0) +
+ (s->gzhead->hcrc ? 2 : 0) +
+ (s->gzhead->extra == Z_NULL ? 0 : 4) +
+ (s->gzhead->name == Z_NULL ? 0 : 8) +
+ (s->gzhead->comment == Z_NULL ? 0 : 16)
+ );
+ put_byte(s, (Byte)(s->gzhead->time & 0xff));
+ put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff));
+ put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff));
+ put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff));
+ put_byte(s, s->level == 9 ? 2 :
+ (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+ 4 : 0));
+ put_byte(s, s->gzhead->os & 0xff);
+ if (s->gzhead->extra != NULL) {
+ put_byte(s, s->gzhead->extra_len & 0xff);
+ put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
+ }
+ if (s->gzhead->hcrc)
+ strm->adler = crc32(strm->adler, s->pending_buf,
+ s->pending);
+ s->gzindex = 0;
+ s->status = EXTRA_STATE;
+ }
+ }
+ else
+#endif
+ {
+ uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
+ uInt level_flags;
+
+ if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)
+ level_flags = 0;
+ else if (s->level < 6)
+ level_flags = 1;
+ else if (s->level == 6)
+ level_flags = 2;
+ else
+ level_flags = 3;
+ header |= (level_flags << 6);
+ if (s->strstart != 0) header |= PRESET_DICT;
+ header += 31 - (header % 31);
+
+ s->status = BUSY_STATE;
+ putShortMSB(s, header);
+
+ /* Save the adler32 of the preset dictionary: */
+ if (s->strstart != 0) {
+ putShortMSB(s, (uInt)(strm->adler >> 16));
+ putShortMSB(s, (uInt)(strm->adler & 0xffff));
+ }
+ strm->adler = adler32(0L, Z_NULL, 0);
+ }
+ }
+#ifdef GZIP
+ if (s->status == EXTRA_STATE) {
+ if (s->gzhead->extra != NULL) {
+ uInt beg = s->pending; /* start of bytes to update crc */
+
+ while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
+ if (s->pending == s->pending_buf_size) {
+ if (s->gzhead->hcrc && s->pending > beg)
+ strm->adler = crc32(strm->adler, s->pending_buf + beg,
+ s->pending - beg);
+ flush_pending(strm);
+ beg = s->pending;
+ if (s->pending == s->pending_buf_size)
+ break;
+ }
+ put_byte(s, s->gzhead->extra[s->gzindex]);
+ s->gzindex++;
+ }
+ if (s->gzhead->hcrc && s->pending > beg)
+ strm->adler = crc32(strm->adler, s->pending_buf + beg,
+ s->pending - beg);
+ if (s->gzindex == s->gzhead->extra_len) {
+ s->gzindex = 0;
+ s->status = NAME_STATE;
+ }
+ }
+ else
+ s->status = NAME_STATE;
+ }
+ if (s->status == NAME_STATE) {
+ if (s->gzhead->name != NULL) {
+ uInt beg = s->pending; /* start of bytes to update crc */
+ int val;
+
+ do {
+ if (s->pending == s->pending_buf_size) {
+ if (s->gzhead->hcrc && s->pending > beg)
+ strm->adler = crc32(strm->adler, s->pending_buf + beg,
+ s->pending - beg);
+ flush_pending(strm);
+ beg = s->pending;
+ if (s->pending == s->pending_buf_size) {
+ val = 1;
+ break;
+ }
+ }
+ val = s->gzhead->name[s->gzindex++];
+ put_byte(s, val);
+ } while (val != 0);
+ if (s->gzhead->hcrc && s->pending > beg)
+ strm->adler = crc32(strm->adler, s->pending_buf + beg,
+ s->pending - beg);
+ if (val == 0) {
+ s->gzindex = 0;
+ s->status = COMMENT_STATE;
+ }
+ }
+ else
+ s->status = COMMENT_STATE;
+ }
+ if (s->status == COMMENT_STATE) {
+ if (s->gzhead->comment != NULL) {
+ uInt beg = s->pending; /* start of bytes to update crc */
+ int val;
+
+ do {
+ if (s->pending == s->pending_buf_size) {
+ if (s->gzhead->hcrc && s->pending > beg)
+ strm->adler = crc32(strm->adler, s->pending_buf + beg,
+ s->pending - beg);
+ flush_pending(strm);
+ beg = s->pending;
+ if (s->pending == s->pending_buf_size) {
+ val = 1;
+ break;
+ }
+ }
+ val = s->gzhead->comment[s->gzindex++];
+ put_byte(s, val);
+ } while (val != 0);
+ if (s->gzhead->hcrc && s->pending > beg)
+ strm->adler = crc32(strm->adler, s->pending_buf + beg,
+ s->pending - beg);
+ if (val == 0)
+ s->status = HCRC_STATE;
+ }
+ else
+ s->status = HCRC_STATE;
+ }
+ if (s->status == HCRC_STATE) {
+ if (s->gzhead->hcrc) {
+ if (s->pending + 2 > s->pending_buf_size)
+ flush_pending(strm);
+ if (s->pending + 2 <= s->pending_buf_size) {
+ put_byte(s, (Byte)(strm->adler & 0xff));
+ put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
+ strm->adler = crc32(0L, Z_NULL, 0);
+ s->status = BUSY_STATE;
+ }
+ }
+ else
+ s->status = BUSY_STATE;
+ }
+#endif
+
+ /* Flush as much pending output as possible */
+ if (s->pending != 0) {
+ flush_pending(strm);
+ if (strm->avail_out == 0) {
+ /* Since avail_out is 0, deflate will be called again with
+ * more output space, but possibly with both pending and
+ * avail_in equal to zero. There won't be anything to do,
+ * but this is not an error situation so make sure we
+ * return OK instead of BUF_ERROR at next call of deflate:
+ */
+ s->last_flush = -1;
+ return Z_OK;
+ }
+
+ /* Make sure there is something to do and avoid duplicate consecutive
+ * flushes. For repeated and useless calls with Z_FINISH, we keep
+ * returning Z_STREAM_END instead of Z_BUF_ERROR.
+ */
+ } else if (strm->avail_in == 0 && flush <= old_flush &&
+ flush != Z_FINISH) {
+ ERR_RETURN(strm, Z_BUF_ERROR);
+ }
+
+ /* User must not provide more input after the first FINISH: */
+ if (s->status == FINISH_STATE && strm->avail_in != 0) {
+ ERR_RETURN(strm, Z_BUF_ERROR);
+ }
+
+ /* Start a new block or continue the current one.
+ */
+ if (strm->avail_in != 0 || s->lookahead != 0 ||
+ (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
+ block_state bstate;
+
+ bstate = (*(configuration_table[s->level].func))(s, flush);
+
+ if (bstate == finish_started || bstate == finish_done) {
+ s->status = FINISH_STATE;
+ }
+ if (bstate == need_more || bstate == finish_started) {
+ if (strm->avail_out == 0) {
+ s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
+ }
+ return Z_OK;
+ /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
+ * of deflate should use the same flush parameter to make sure
+ * that the flush is complete. So we don't have to output an
+ * empty block here, this will be done at next call. This also
+ * ensures that for a very small output buffer, we emit at most
+ * one empty block.
+ */
+ }
+ if (bstate == block_done) {
+ if (flush == Z_PARTIAL_FLUSH) {
+ _tr_align(s);
+ } else { /* FULL_FLUSH or SYNC_FLUSH */
+ _tr_stored_block(s, (char*)0, 0L, 0);
+ /* For a full flush, this empty block will be recognized
+ * as a special marker by inflate_sync().
+ */
+ if (flush == Z_FULL_FLUSH) {
+ CLEAR_HASH(s); /* forget history */
+ }
+ }
+ flush_pending(strm);
+ if (strm->avail_out == 0) {
+ s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
+ return Z_OK;
+ }
+ }
+ }
+ Assert(strm->avail_out > 0, "bug2");
+
+ if (flush != Z_FINISH) return Z_OK;
+ if (s->wrap <= 0) return Z_STREAM_END;
+
+ /* Write the trailer */
+#ifdef GZIP
+ if (s->wrap == 2) {
+ put_byte(s, (Byte)(strm->adler & 0xff));
+ put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
+ put_byte(s, (Byte)((strm->adler >> 16) & 0xff));
+ put_byte(s, (Byte)((strm->adler >> 24) & 0xff));
+ put_byte(s, (Byte)(strm->total_in & 0xff));
+ put_byte(s, (Byte)((strm->total_in >> 8) & 0xff));
+ put_byte(s, (Byte)((strm->total_in >> 16) & 0xff));
+ put_byte(s, (Byte)((strm->total_in >> 24) & 0xff));
+ }
+ else
+#endif
+ {
+ putShortMSB(s, (uInt)(strm->adler >> 16));
+ putShortMSB(s, (uInt)(strm->adler & 0xffff));
+ }
+ flush_pending(strm);
+ /* If avail_out is zero, the application will call deflate again
+ * to flush the rest.
+ */
+ if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */
+ return s->pending != 0 ? Z_OK : Z_STREAM_END;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateEnd (strm)
+ z_streamp strm;
+{
+ int status;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+
+ status = strm->state->status;
+ if (status != INIT_STATE &&
+ status != EXTRA_STATE &&
+ status != NAME_STATE &&
+ status != COMMENT_STATE &&
+ status != HCRC_STATE &&
+ status != BUSY_STATE &&
+ status != FINISH_STATE) {
+ return Z_STREAM_ERROR;
+ }
+
+ /* Deallocate in reverse order of allocations: */
+ TRY_FREE(strm, strm->state->pending_buf);
+ TRY_FREE(strm, strm->state->head);
+ TRY_FREE(strm, strm->state->prev);
+ TRY_FREE(strm, strm->state->window);
+
+ ZFREE(strm, strm->state);
+ strm->state = Z_NULL;
+
+ return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;
+}
+
+/* =========================================================================
+ * Copy the source state to the destination state.
+ * To simplify the source, this is not supported for 16-bit MSDOS (which
+ * doesn't have enough memory anyway to duplicate compression states).
+ */
+int ZEXPORT deflateCopy (dest, source)
+ z_streamp dest;
+ z_streamp source;
+{
+#ifdef MAXSEG_64K
+ return Z_STREAM_ERROR;
+#else
+ deflate_state *ds;
+ deflate_state *ss;
+ ushf *overlay;
+
+
+ if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
+ return Z_STREAM_ERROR;
+ }
+
+ ss = source->state;
+
+ zmemcpy(dest, source, sizeof(z_stream));
+
+ ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
+ if (ds == Z_NULL) return Z_MEM_ERROR;
+ dest->state = (struct internal_state FAR *) ds;
+ zmemcpy(ds, ss, sizeof(deflate_state));
+ ds->strm = dest;
+
+ ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
+ ds->prev = (Posf *) ZALLOC(dest, ds->w_size, sizeof(Pos));
+ ds->head = (Posf *) ZALLOC(dest, ds->hash_size, sizeof(Pos));
+ overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
+ ds->pending_buf = (uchf *) overlay;
+
+ if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
+ ds->pending_buf == Z_NULL) {
+ deflateEnd (dest);
+ return Z_MEM_ERROR;
+ }
+ /* following zmemcpy do not work for 16-bit MSDOS */
+ zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
+ zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos));
+ zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos));
+ zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
+
+ ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
+ ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
+ ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
+
+ ds->l_desc.dyn_tree = ds->dyn_ltree;
+ ds->d_desc.dyn_tree = ds->dyn_dtree;
+ ds->bl_desc.dyn_tree = ds->bl_tree;
+
+ return Z_OK;
+#endif /* MAXSEG_64K */
+}
+
+/* ===========================================================================
+ * Read a new buffer from the current input stream, update the adler32
+ * and total number of bytes read. All deflate() input goes through
+ * this function so some applications may wish to modify it to avoid
+ * allocating a large strm->next_in buffer and copying from it.
+ * (See also flush_pending()).
+ */
+local int read_buf(strm, buf, size)
+ z_streamp strm;
+ Bytef *buf;
+ unsigned size;
+{
+ unsigned len = strm->avail_in;
+
+ if (len > size) len = size;
+ if (len == 0) return 0;
+
+ strm->avail_in -= len;
+
+ if (strm->state->wrap == 1) {
+ strm->adler = adler32(strm->adler, strm->next_in, len);
+ }
+#ifdef GZIP
+ else if (strm->state->wrap == 2) {
+ strm->adler = crc32(strm->adler, strm->next_in, len);
+ }
+#endif
+ zmemcpy(buf, strm->next_in, len);
+ strm->next_in += len;
+ strm->total_in += len;
+
+ return (int)len;
+}
+
+/* ===========================================================================
+ * Initialize the "longest match" routines for a new zlib stream
+ */
+local void lm_init (s)
+ deflate_state *s;
+{
+ s->window_size = (ulg)2L*s->w_size;
+
+ CLEAR_HASH(s);
+
+ /* Set the default configuration parameters:
+ */
+ s->max_lazy_match = configuration_table[s->level].max_lazy;
+ s->good_match = configuration_table[s->level].good_length;
+ s->nice_match = configuration_table[s->level].nice_length;
+ s->max_chain_length = configuration_table[s->level].max_chain;
+
+ s->strstart = 0;
+ s->block_start = 0L;
+ s->lookahead = 0;
+ s->match_length = s->prev_length = MIN_MATCH-1;
+ s->match_available = 0;
+ s->ins_h = 0;
+#ifndef FASTEST
+#ifdef ASMV
+ match_init(); /* initialize the asm code */
+#endif
+#endif
+}
+
+#ifndef FASTEST
+/* ===========================================================================
+ * Set match_start to the longest match starting at the given string and
+ * return its length. Matches shorter or equal to prev_length are discarded,
+ * in which case the result is equal to prev_length and match_start is
+ * garbage.
+ * IN assertions: cur_match is the head of the hash chain for the current
+ * string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
+ * OUT assertion: the match length is not greater than s->lookahead.
+ */
+#ifndef ASMV
+/* For 80x86 and 680x0, an optimized version will be provided in match.asm or
+ * match.S. The code will be functionally equivalent.
+ */
+local uInt longest_match(s, cur_match)
+ deflate_state *s;
+ IPos cur_match; /* current match */
+{
+ unsigned chain_length = s->max_chain_length;/* max hash chain length */
+ register Bytef *scan = s->window + s->strstart; /* current string */
+ register Bytef *match; /* matched string */
+ register int len; /* length of current match */
+ int best_len = s->prev_length; /* best match length so far */
+ int nice_match = s->nice_match; /* stop if match long enough */
+ IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
+ s->strstart - (IPos)MAX_DIST(s) : NIL;
+ /* Stop when cur_match becomes <= limit. To simplify the code,
+ * we prevent matches with the string of window index 0.
+ */
+ Posf *prev = s->prev;
+ uInt wmask = s->w_mask;
+
+#ifdef UNALIGNED_OK
+ /* Compare two bytes at a time. Note: this is not always beneficial.
+ * Try with and without -DUNALIGNED_OK to check.
+ */
+ register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;
+ register ush scan_start = *(ushf*)scan;
+ register ush scan_end = *(ushf*)(scan+best_len-1);
+#else
+ register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+ register Byte scan_end1 = scan[best_len-1];
+ register Byte scan_end = scan[best_len];
+#endif
+
+ /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+ * It is easy to get rid of this optimization if necessary.
+ */
+ Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+ /* Do not waste too much time if we already have a good match: */
+ if (s->prev_length >= s->good_match) {
+ chain_length >>= 2;
+ }
+ /* Do not look for matches beyond the end of the input. This is necessary
+ * to make deflate deterministic.
+ */
+ if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
+
+ Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+ do {
+ Assert(cur_match < s->strstart, "no future");
+ match = s->window + cur_match;
+
+ /* Skip to next match if the match length cannot increase
+ * or if the match length is less than 2. Note that the checks below
+ * for insufficient lookahead only occur occasionally for performance
+ * reasons. Therefore uninitialized memory will be accessed, and
+ * conditional jumps will be made that depend on those values.
+ * However the length of the match is limited to the lookahead, so
+ * the output of deflate is not affected by the uninitialized values.
+ */
+#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
+ /* This code assumes sizeof(unsigned short) == 2. Do not use
+ * UNALIGNED_OK if your compiler uses a different size.
+ */
+ if (*(ushf*)(match+best_len-1) != scan_end ||
+ *(ushf*)match != scan_start) continue;
+
+ /* It is not necessary to compare scan[2] and match[2] since they are
+ * always equal when the other bytes match, given that the hash keys
+ * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
+ * strstart+3, +5, ... up to strstart+257. We check for insufficient
+ * lookahead only every 4th comparison; the 128th check will be made
+ * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is
+ * necessary to put more guard bytes at the end of the window, or
+ * to check more often for insufficient lookahead.
+ */
+ Assert(scan[2] == match[2], "scan[2]?");
+ scan++, match++;
+ do {
+ } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+ *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+ *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+ *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+ scan < strend);
+ /* The funny "do {}" generates better code on most compilers */
+
+ /* Here, scan <= window+strstart+257 */
+ Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+ if (*scan == *match) scan++;
+
+ len = (MAX_MATCH - 1) - (int)(strend-scan);
+ scan = strend - (MAX_MATCH-1);
+
+#else /* UNALIGNED_OK */
+
+ if (match[best_len] != scan_end ||
+ match[best_len-1] != scan_end1 ||
+ *match != *scan ||
+ *++match != scan[1]) continue;
+
+ /* The check at best_len-1 can be removed because it will be made
+ * again later. (This heuristic is not always a win.)
+ * It is not necessary to compare scan[2] and match[2] since they
+ * are always equal when the other bytes match, given that
+ * the hash keys are equal and that HASH_BITS >= 8.
+ */
+ scan += 2, match++;
+ Assert(*scan == *match, "match[2]?");
+
+ /* We check for insufficient lookahead only every 8th comparison;
+ * the 256th check will be made at strstart+258.
+ */
+ do {
+ } while (*++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ scan < strend);
+
+ Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+ len = MAX_MATCH - (int)(strend - scan);
+ scan = strend - MAX_MATCH;
+
+#endif /* UNALIGNED_OK */
+
+ if (len > best_len) {
+ s->match_start = cur_match;
+ best_len = len;
+ if (len >= nice_match) break;
+#ifdef UNALIGNED_OK
+ scan_end = *(ushf*)(scan+best_len-1);
+#else
+ scan_end1 = scan[best_len-1];
+ scan_end = scan[best_len];
+#endif
+ }
+ } while ((cur_match = prev[cur_match & wmask]) > limit
+ && --chain_length != 0);
+
+ if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
+ return s->lookahead;
+}
+#endif /* ASMV */
+#endif /* FASTEST */
+
+/* ---------------------------------------------------------------------------
+ * Optimized version for level == 1 or strategy == Z_RLE only
+ */
+local uInt longest_match_fast(s, cur_match)
+ deflate_state *s;
+ IPos cur_match; /* current match */
+{
+ register Bytef *scan = s->window + s->strstart; /* current string */
+ register Bytef *match; /* matched string */
+ register int len; /* length of current match */
+ register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+
+ /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+ * It is easy to get rid of this optimization if necessary.
+ */
+ Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+ Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+ Assert(cur_match < s->strstart, "no future");
+
+ match = s->window + cur_match;
+
+ /* Return failure if the match length is less than 2:
+ */
+ if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;
+
+ /* The check at best_len-1 can be removed because it will be made
+ * again later. (This heuristic is not always a win.)
+ * It is not necessary to compare scan[2] and match[2] since they
+ * are always equal when the other bytes match, given that
+ * the hash keys are equal and that HASH_BITS >= 8.
+ */
+ scan += 2, match += 2;
+ Assert(*scan == *match, "match[2]?");
+
+ /* We check for insufficient lookahead only every 8th comparison;
+ * the 256th check will be made at strstart+258.
+ */
+ do {
+ } while (*++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ *++scan == *++match && *++scan == *++match &&
+ scan < strend);
+
+ Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+ len = MAX_MATCH - (int)(strend - scan);
+
+ if (len < MIN_MATCH) return MIN_MATCH - 1;
+
+ s->match_start = cur_match;
+ return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead;
+}
+
+#ifdef DEBUG
+/* ===========================================================================
+ * Check that the match at match_start is indeed a match.
+ */
+local void check_match(s, start, match, length)
+ deflate_state *s;
+ IPos start, match;
+ int length;
+{
+ /* check that the match is indeed a match */
+ if (zmemcmp(s->window + match,
+ s->window + start, length) != EQUAL) {
+ fprintf(stderr, " start %u, match %u, length %d\n",
+ start, match, length);
+ do {
+ fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
+ } while (--length != 0);
+ z_error("invalid match");
+ }
+ if (z_verbose > 1) {
+ fprintf(stderr,"\\[%d,%d]", start-match, length);
+ do { putc(s->window[start++], stderr); } while (--length != 0);
+ }
+}
+#else
+# define check_match(s, start, match, length)
+#endif /* DEBUG */
+
+/* ===========================================================================
+ * Fill the window when the lookahead becomes insufficient.
+ * Updates strstart and lookahead.
+ *
+ * IN assertion: lookahead < MIN_LOOKAHEAD
+ * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
+ * At least one byte has been read, or avail_in == 0; reads are
+ * performed for at least two bytes (required for the zip translate_eol
+ * option -- not supported here).
+ */
+local void fill_window(s)
+ deflate_state *s;
+{
+ register unsigned n, m;
+ register Posf *p;
+ unsigned more; /* Amount of free space at the end of the window. */
+ uInt wsize = s->w_size;
+
+ do {
+ more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
+
+ /* Deal with !@#$% 64K limit: */
+ if (sizeof(int) <= 2) {
+ if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
+ more = wsize;
+
+ } else if (more == (unsigned)(-1)) {
+ /* Very unlikely, but possible on 16 bit machine if
+ * strstart == 0 && lookahead == 1 (input done a byte at time)
+ */
+ more--;
+ }
+ }
+
+ /* If the window is almost full and there is insufficient lookahead,
+ * move the upper half to the lower one to make room in the upper half.
+ */
+ if (s->strstart >= wsize+MAX_DIST(s)) {
+
+ zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
+ s->match_start -= wsize;
+ s->strstart -= wsize; /* we now have strstart >= MAX_DIST */
+ s->block_start -= (long) wsize;
+
+ /* Slide the hash table (could be avoided with 32 bit values
+ at the expense of memory usage). We slide even when level == 0
+ to keep the hash table consistent if we switch back to level > 0
+ later. (Using level 0 permanently is not an optimal usage of
+ zlib, so we don't care about this pathological case.)
+ */
+ /* %%% avoid this when Z_RLE */
+ n = s->hash_size;
+ p = &s->head[n];
+ do {
+ m = *--p;
+ *p = (Pos)(m >= wsize ? m-wsize : NIL);
+ } while (--n);
+
+ n = wsize;
+#ifndef FASTEST
+ p = &s->prev[n];
+ do {
+ m = *--p;
+ *p = (Pos)(m >= wsize ? m-wsize : NIL);
+ /* If n is not on any hash chain, prev[n] is garbage but
+ * its value will never be used.
+ */
+ } while (--n);
+#endif
+ more += wsize;
+ }
+ if (s->strm->avail_in == 0) return;
+
+ /* If there was no sliding:
+ * strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
+ * more == window_size - lookahead - strstart
+ * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
+ * => more >= window_size - 2*WSIZE + 2
+ * In the BIG_MEM or MMAP case (not yet supported),
+ * window_size == input_size + MIN_LOOKAHEAD &&
+ * strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
+ * Otherwise, window_size == 2*WSIZE so more >= 2.
+ * If there was sliding, more >= WSIZE. So in all cases, more >= 2.
+ */
+ Assert(more >= 2, "more < 2");
+
+ n = read_buf(s->strm, s->window + s->strstart + s->lookahead, more);
+ s->lookahead += n;
+
+ /* Initialize the hash value now that we have some input: */
+ if (s->lookahead >= MIN_MATCH) {
+ s->ins_h = s->window[s->strstart];
+ UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+#if MIN_MATCH != 3
+ Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+ }
+ /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
+ * but this is not important since only literal bytes will be emitted.
+ */
+
+ } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0);
+}
+
+/* ===========================================================================
+ * Flush the current block, with given end-of-file flag.
+ * IN assertion: strstart is set to the end of the current match.
+ */
+#define FLUSH_BLOCK_ONLY(s, eof) { \
+ _tr_flush_block(s, (s->block_start >= 0L ? \
+ (charf *)&s->window[(unsigned)s->block_start] : \
+ (charf *)Z_NULL), \
+ (ulg)((long)s->strstart - s->block_start), \
+ (eof)); \
+ s->block_start = s->strstart; \
+ flush_pending(s->strm); \
+ Tracev((stderr,"[FLUSH]")); \
+}
+
+/* Same but force premature exit if necessary. */
+#define FLUSH_BLOCK(s, eof) { \
+ FLUSH_BLOCK_ONLY(s, eof); \
+ if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \
+}
+
+/* ===========================================================================
+ * Copy without compression as much as possible from the input stream, return
+ * the current block state.
+ * This function does not insert new strings in the dictionary since
+ * uncompressible data is probably not useful. This function is used
+ * only for the level=0 compression option.
+ * NOTE: this function should be optimized to avoid extra copying from
+ * window to pending_buf.
+ */
+local block_state deflate_stored(s, flush)
+ deflate_state *s;
+ int flush;
+{
+ /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
+ * to pending_buf_size, and each stored block has a 5 byte header:
+ */
+ ulg max_block_size = 0xffff;
+ ulg max_start;
+
+ if (max_block_size > s->pending_buf_size - 5) {
+ max_block_size = s->pending_buf_size - 5;
+ }
+
+ /* Copy as much as possible from input to output: */
+ for (;;) {
+ /* Fill the window as much as possible: */
+ if (s->lookahead <= 1) {
+
+ Assert(s->strstart < s->w_size+MAX_DIST(s) ||
+ s->block_start >= (long)s->w_size, "slide too late");
+
+ fill_window(s);
+ if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
+
+ if (s->lookahead == 0) break; /* flush the current block */
+ }
+ Assert(s->block_start >= 0L, "block gone");
+
+ s->strstart += s->lookahead;
+ s->lookahead = 0;
+
+ /* Emit a stored block if pending_buf will be full: */
+ max_start = s->block_start + max_block_size;
+ if (s->strstart == 0 || (ulg)s->strstart >= max_start) {
+ /* strstart == 0 is possible when wraparound on 16-bit machine */
+ s->lookahead = (uInt)(s->strstart - max_start);
+ s->strstart = (uInt)max_start;
+ FLUSH_BLOCK(s, 0);
+ }
+ /* Flush if we may have to slide, otherwise block_start may become
+ * negative and the data will be gone:
+ */
+ if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {
+ FLUSH_BLOCK(s, 0);
+ }
+ }
+ FLUSH_BLOCK(s, flush == Z_FINISH);
+ return flush == Z_FINISH ? finish_done : block_done;
+}
+
+/* ===========================================================================
+ * Compress as much as possible from the input stream, return the current
+ * block state.
+ * This function does not perform lazy evaluation of matches and inserts
+ * new strings in the dictionary only for unmatched strings or for short
+ * matches. It is used only for the fast compression options.
+ */
+local block_state deflate_fast(s, flush)
+ deflate_state *s;
+ int flush;
+{
+ IPos hash_head = NIL; /* head of the hash chain */
+ int bflush; /* set if current block must be flushed */
+
+ for (;;) {
+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the next match, plus MIN_MATCH bytes to insert the
+ * string following the next match.
+ */
+ if (s->lookahead < MIN_LOOKAHEAD) {
+ fill_window(s);
+ if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
+ return need_more;
+ }
+ if (s->lookahead == 0) break; /* flush the current block */
+ }
+
+ /* Insert the string window[strstart .. strstart+2] in the
+ * dictionary, and set hash_head to the head of the hash chain:
+ */
+ if (s->lookahead >= MIN_MATCH) {
+ INSERT_STRING(s, s->strstart, hash_head);
+ }
+
+ /* Find the longest match, discarding those <= prev_length.
+ * At this point we have always match_length < MIN_MATCH
+ */
+ if (hash_head != NIL && s->strstart - hash_head <= MAX_DIST(s)) {
+ /* To simplify the code, we prevent matches with the string
+ * of window index 0 (in particular we have to avoid a match
+ * of the string with itself at the start of the input file).
+ */
+#ifdef FASTEST
+ if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) ||
+ (s->strategy == Z_RLE && s->strstart - hash_head == 1)) {
+ s->match_length = longest_match_fast (s, hash_head);
+ }
+#else
+ if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
+ s->match_length = longest_match (s, hash_head);
+ } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
+ s->match_length = longest_match_fast (s, hash_head);
+ }
+#endif
+ /* longest_match() or longest_match_fast() sets match_start */
+ }
+ if (s->match_length >= MIN_MATCH) {
+ check_match(s, s->strstart, s->match_start, s->match_length);
+
+ _tr_tally_dist(s, s->strstart - s->match_start,
+ s->match_length - MIN_MATCH, bflush);
+
+ s->lookahead -= s->match_length;
+
+ /* Insert new strings in the hash table only if the match length
+ * is not too large. This saves time but degrades compression.
+ */
+#ifndef FASTEST
+ if (s->match_length <= s->max_insert_length &&
+ s->lookahead >= MIN_MATCH) {
+ s->match_length--; /* string at strstart already in table */
+ do {
+ s->strstart++;
+ INSERT_STRING(s, s->strstart, hash_head);
+ /* strstart never exceeds WSIZE-MAX_MATCH, so there are
+ * always MIN_MATCH bytes ahead.
+ */
+ } while (--s->match_length != 0);
+ s->strstart++;
+ } else
+#endif
+ {
+ s->strstart += s->match_length;
+ s->match_length = 0;
+ s->ins_h = s->window[s->strstart];
+ UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+#if MIN_MATCH != 3
+ Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+ /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
+ * matter since it will be recomputed at next deflate call.
+ */
+ }
+ } else {
+ /* No match, output a literal byte */
+ Tracevv((stderr,"%c", s->window[s->strstart]));
+ _tr_tally_lit (s, s->window[s->strstart], bflush);
+ s->lookahead--;
+ s->strstart++;
+ }
+ if (bflush) FLUSH_BLOCK(s, 0);
+ }
+ FLUSH_BLOCK(s, flush == Z_FINISH);
+ return flush == Z_FINISH ? finish_done : block_done;
+}
+
+#ifndef FASTEST
+/* ===========================================================================
+ * Same as above, but achieves better compression. We use a lazy
+ * evaluation for matches: a match is finally adopted only if there is
+ * no better match at the next window position.
+ */
+local block_state deflate_slow(s, flush)
+ deflate_state *s;
+ int flush;
+{
+ IPos hash_head = NIL; /* head of hash chain */
+ int bflush; /* set if current block must be flushed */
+
+ /* Process the input block. */
+ for (;;) {
+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the next match, plus MIN_MATCH bytes to insert the
+ * string following the next match.
+ */
+ if (s->lookahead < MIN_LOOKAHEAD) {
+ fill_window(s);
+ if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
+ return need_more;
+ }
+ if (s->lookahead == 0) break; /* flush the current block */
+ }
+
+ /* Insert the string window[strstart .. strstart+2] in the
+ * dictionary, and set hash_head to the head of the hash chain:
+ */
+ if (s->lookahead >= MIN_MATCH) {
+ INSERT_STRING(s, s->strstart, hash_head);
+ }
+
+ /* Find the longest match, discarding those <= prev_length.
+ */
+ s->prev_length = s->match_length, s->prev_match = s->match_start;
+ s->match_length = MIN_MATCH-1;
+
+ if (hash_head != NIL && s->prev_length < s->max_lazy_match &&
+ s->strstart - hash_head <= MAX_DIST(s)) {
+ /* To simplify the code, we prevent matches with the string
+ * of window index 0 (in particular we have to avoid a match
+ * of the string with itself at the start of the input file).
+ */
+ if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
+ s->match_length = longest_match (s, hash_head);
+ } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
+ s->match_length = longest_match_fast (s, hash_head);
+ }
+ /* longest_match() or longest_match_fast() sets match_start */
+
+ if (s->match_length <= 5 && (s->strategy == Z_FILTERED
+#if TOO_FAR <= 32767
+ || (s->match_length == MIN_MATCH &&
+ s->strstart - s->match_start > TOO_FAR)
+#endif
+ )) {
+
+ /* If prev_match is also MIN_MATCH, match_start is garbage
+ * but we will ignore the current match anyway.
+ */
+ s->match_length = MIN_MATCH-1;
+ }
+ }
+ /* If there was a match at the previous step and the current
+ * match is not better, output the previous match:
+ */
+ if (s->prev_length >= MIN_MATCH && s->match_length <= s->prev_length) {
+ uInt max_insert = s->strstart + s->lookahead - MIN_MATCH;
+ /* Do not insert strings in hash table beyond this. */
+
+ check_match(s, s->strstart-1, s->prev_match, s->prev_length);
+
+ _tr_tally_dist(s, s->strstart -1 - s->prev_match,
+ s->prev_length - MIN_MATCH, bflush);
+
+ /* Insert in hash table all strings up to the end of the match.
+ * strstart-1 and strstart are already inserted. If there is not
+ * enough lookahead, the last two strings are not inserted in
+ * the hash table.
+ */
+ s->lookahead -= s->prev_length-1;
+ s->prev_length -= 2;
+ do {
+ if (++s->strstart <= max_insert) {
+ INSERT_STRING(s, s->strstart, hash_head);
+ }
+ } while (--s->prev_length != 0);
+ s->match_available = 0;
+ s->match_length = MIN_MATCH-1;
+ s->strstart++;
+
+ if (bflush) FLUSH_BLOCK(s, 0);
+
+ } else if (s->match_available) {
+ /* If there was no match at the previous position, output a
+ * single literal. If there was a match but the current match
+ * is longer, truncate the previous match to a single literal.
+ */
+ Tracevv((stderr,"%c", s->window[s->strstart-1]));
+ _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+ if (bflush) {
+ FLUSH_BLOCK_ONLY(s, 0);
+ }
+ s->strstart++;
+ s->lookahead--;
+ if (s->strm->avail_out == 0) return need_more;
+ } else {
+ /* There is no previous match to compare with, wait for
+ * the next step to decide.
+ */
+ s->match_available = 1;
+ s->strstart++;
+ s->lookahead--;
+ }
+ }
+ Assert (flush != Z_NO_FLUSH, "no flush?");
+ if (s->match_available) {
+ Tracevv((stderr,"%c", s->window[s->strstart-1]));
+ _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+ s->match_available = 0;
+ }
+ FLUSH_BLOCK(s, flush == Z_FINISH);
+ return flush == Z_FINISH ? finish_done : block_done;
+}
+#endif /* FASTEST */
+
+#if 0
+/* ===========================================================================
+ * For Z_RLE, simply look for runs of bytes, generate matches only of distance
+ * one. Do not maintain a hash table. (It will be regenerated if this run of
+ * deflate switches away from Z_RLE.)
+ */
+local block_state deflate_rle(s, flush)
+ deflate_state *s;
+ int flush;
+{
+ int bflush; /* set if current block must be flushed */
+ uInt run; /* length of run */
+ uInt max; /* maximum length of run */
+ uInt prev; /* byte at distance one to match */
+ Bytef *scan; /* scan for end of run */
+
+ for (;;) {
+ /* Make sure that we always have enough lookahead, except
+ * at the end of the input file. We need MAX_MATCH bytes
+ * for the longest encodable run.
+ */
+ if (s->lookahead < MAX_MATCH) {
+ fill_window(s);
+ if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) {
+ return need_more;
+ }
+ if (s->lookahead == 0) break; /* flush the current block */
+ }
+
+ /* See how many times the previous byte repeats */
+ run = 0;
+ if (s->strstart > 0) { /* if there is a previous byte, that is */
+ max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH;
+ scan = s->window + s->strstart - 1;
+ prev = *scan++;
+ do {
+ if (*scan++ != prev)
+ break;
+ } while (++run < max);
+ }
+
+ /* Emit match if have run of MIN_MATCH or longer, else emit literal */
+ if (run >= MIN_MATCH) {
+ check_match(s, s->strstart, s->strstart - 1, run);
+ _tr_tally_dist(s, 1, run - MIN_MATCH, bflush);
+ s->lookahead -= run;
+ s->strstart += run;
+ } else {
+ /* No match, output a literal byte */
+ Tracevv((stderr,"%c", s->window[s->strstart]));
+ _tr_tally_lit (s, s->window[s->strstart], bflush);
+ s->lookahead--;
+ s->strstart++;
+ }
+ if (bflush) FLUSH_BLOCK(s, 0);
+ }
+ FLUSH_BLOCK(s, flush == Z_FINISH);
+ return flush == Z_FINISH ? finish_done : block_done;
+}
+#endif
--- /dev/null
+/* deflate.h -- internal compression state
+ * Copyright (C) 1995-2004 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* @(#) $Id$ */
+
+#ifndef DEFLATE_H
+#define DEFLATE_H
+
+#include "zutil.h"
+
+/* define NO_GZIP when compiling if you want to disable gzip header and
+ trailer creation by deflate(). NO_GZIP would be used to avoid linking in
+ the crc code when it is not needed. For shared libraries, gzip encoding
+ should be left enabled. */
+#ifndef NO_GZIP
+# define GZIP
+#endif
+
+/* ===========================================================================
+ * Internal compression state.
+ */
+
+#define LENGTH_CODES 29
+/* number of length codes, not counting the special END_BLOCK code */
+
+#define LITERALS 256
+/* number of literal bytes 0..255 */
+
+#define L_CODES (LITERALS+1+LENGTH_CODES)
+/* number of Literal or Length codes, including the END_BLOCK code */
+
+#define D_CODES 30
+/* number of distance codes */
+
+#define BL_CODES 19
+/* number of codes used to transfer the bit lengths */
+
+#define HEAP_SIZE (2*L_CODES+1)
+/* maximum heap size */
+
+#define MAX_BITS 15
+/* All codes must not exceed MAX_BITS bits */
+
+#define INIT_STATE 42
+#define EXTRA_STATE 69
+#define NAME_STATE 73
+#define COMMENT_STATE 91
+#define HCRC_STATE 103
+#define BUSY_STATE 113
+#define FINISH_STATE 666
+/* Stream status */
+
+
+/* Data structure describing a single value and its code string. */
+typedef struct ct_data_s {
+ union {
+ ush freq; /* frequency count */
+ ush code; /* bit string */
+ } fc;
+ union {
+ ush dad; /* father node in Huffman tree */
+ ush len; /* length of bit string */
+ } dl;
+} FAR ct_data;
+
+#define Freq fc.freq
+#define Code fc.code
+#define Dad dl.dad
+#define Len dl.len
+
+typedef struct static_tree_desc_s static_tree_desc;
+
+typedef struct tree_desc_s {
+ ct_data *dyn_tree; /* the dynamic tree */
+ int max_code; /* largest code with non zero frequency */
+ static_tree_desc *stat_desc; /* the corresponding static tree */
+} FAR tree_desc;
+
+typedef ush Pos;
+typedef Pos FAR Posf;
+typedef unsigned IPos;
+
+/* A Pos is an index in the character window. We use short instead of int to
+ * save space in the various tables. IPos is used only for parameter passing.
+ */
+
+typedef struct internal_state {
+ z_streamp strm; /* pointer back to this zlib stream */
+ int status; /* as the name implies */
+ Bytef *pending_buf; /* output still pending */
+ ulg pending_buf_size; /* size of pending_buf */
+ Bytef *pending_out; /* next pending byte to output to the stream */
+ uInt pending; /* nb of bytes in the pending buffer */
+ int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
+ gz_headerp gzhead; /* gzip header information to write */
+ uInt gzindex; /* where in extra, name, or comment */
+ Byte method; /* STORED (for zip only) or DEFLATED */
+ int last_flush; /* value of flush param for previous deflate call */
+
+ /* used by deflate.c: */
+
+ uInt w_size; /* LZ77 window size (32K by default) */
+ uInt w_bits; /* log2(w_size) (8..16) */
+ uInt w_mask; /* w_size - 1 */
+
+ Bytef *window;
+ /* Sliding window. Input bytes are read into the second half of the window,
+ * and move to the first half later to keep a dictionary of at least wSize
+ * bytes. With this organization, matches are limited to a distance of
+ * wSize-MAX_MATCH bytes, but this ensures that IO is always
+ * performed with a length multiple of the block size. Also, it limits
+ * the window size to 64K, which is quite useful on MSDOS.
+ * To do: use the user input buffer as sliding window.
+ */
+
+ ulg window_size;
+ /* Actual size of window: 2*wSize, except when the user input buffer
+ * is directly used as sliding window.
+ */
+
+ Posf *prev;
+ /* Link to older string with same hash index. To limit the size of this
+ * array to 64K, this link is maintained only for the last 32K strings.
+ * An index in this array is thus a window index modulo 32K.
+ */
+
+ Posf *head; /* Heads of the hash chains or NIL. */
+
+ uInt ins_h; /* hash index of string to be inserted */
+ uInt hash_size; /* number of elements in hash table */
+ uInt hash_bits; /* log2(hash_size) */
+ uInt hash_mask; /* hash_size-1 */
+
+ uInt hash_shift;
+ /* Number of bits by which ins_h must be shifted at each input
+ * step. It must be such that after MIN_MATCH steps, the oldest
+ * byte no longer takes part in the hash key, that is:
+ * hash_shift * MIN_MATCH >= hash_bits
+ */
+
+ long block_start;
+ /* Window position at the beginning of the current output block. Gets
+ * negative when the window is moved backwards.
+ */
+
+ uInt match_length; /* length of best match */
+ IPos prev_match; /* previous match */
+ int match_available; /* set if previous match exists */
+ uInt strstart; /* start of string to insert */
+ uInt match_start; /* start of matching string */
+ uInt lookahead; /* number of valid bytes ahead in window */
+
+ uInt prev_length;
+ /* Length of the best match at previous step. Matches not greater than this
+ * are discarded. This is used in the lazy match evaluation.
+ */
+
+ uInt max_chain_length;
+ /* To speed up deflation, hash chains are never searched beyond this
+ * length. A higher limit improves compression ratio but degrades the
+ * speed.
+ */
+
+ uInt max_lazy_match;
+ /* Attempt to find a better match only when the current match is strictly
+ * smaller than this value. This mechanism is used only for compression
+ * levels >= 4.
+ */
+# define max_insert_length max_lazy_match
+ /* Insert new strings in the hash table only if the match length is not
+ * greater than this length. This saves time but degrades compression.
+ * max_insert_length is used only for compression levels <= 3.
+ */
+
+ int level; /* compression level (1..9) */
+ int strategy; /* favor or force Huffman coding*/
+
+ uInt good_match;
+ /* Use a faster search when the previous match is longer than this */
+
+ int nice_match; /* Stop searching when current match exceeds this */
+
+ /* used by trees.c: */
+ /* Didn't use ct_data typedef below to supress compiler warning */
+ struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
+ struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
+ struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */
+
+ struct tree_desc_s l_desc; /* desc. for literal tree */
+ struct tree_desc_s d_desc; /* desc. for distance tree */
+ struct tree_desc_s bl_desc; /* desc. for bit length tree */
+
+ ush bl_count[MAX_BITS+1];
+ /* number of codes at each bit length for an optimal tree */
+
+ int heap[2*L_CODES+1]; /* heap used to build the Huffman trees */
+ int heap_len; /* number of elements in the heap */
+ int heap_max; /* element of largest frequency */
+ /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
+ * The same heap array is used to build all trees.
+ */
+
+ uch depth[2*L_CODES+1];
+ /* Depth of each subtree used as tie breaker for trees of equal frequency
+ */
+
+ uchf *l_buf; /* buffer for literals or lengths */
+
+ uInt lit_bufsize;
+ /* Size of match buffer for literals/lengths. There are 4 reasons for
+ * limiting lit_bufsize to 64K:
+ * - frequencies can be kept in 16 bit counters
+ * - if compression is not successful for the first block, all input
+ * data is still in the window so we can still emit a stored block even
+ * when input comes from standard input. (This can also be done for
+ * all blocks if lit_bufsize is not greater than 32K.)
+ * - if compression is not successful for a file smaller than 64K, we can
+ * even emit a stored file instead of a stored block (saving 5 bytes).
+ * This is applicable only for zip (not gzip or zlib).
+ * - creating new Huffman trees less frequently may not provide fast
+ * adaptation to changes in the input data statistics. (Take for
+ * example a binary file with poorly compressible code followed by
+ * a highly compressible string table.) Smaller buffer sizes give
+ * fast adaptation but have of course the overhead of transmitting
+ * trees more frequently.
+ * - I can't count above 4
+ */
+
+ uInt last_lit; /* running index in l_buf */
+
+ ushf *d_buf;
+ /* Buffer for distances. To simplify the code, d_buf and l_buf have
+ * the same number of elements. To use different lengths, an extra flag
+ * array would be necessary.
+ */
+
+ ulg opt_len; /* bit length of current block with optimal trees */
+ ulg static_len; /* bit length of current block with static trees */
+ uInt matches; /* number of string matches in current block */
+ int last_eob_len; /* bit length of EOB code for last block */
+
+#ifdef DEBUG
+ ulg compressed_len; /* total bit length of compressed file mod 2^32 */
+ ulg bits_sent; /* bit length of compressed data sent mod 2^32 */
+#endif
+
+ ush bi_buf;
+ /* Output buffer. bits are inserted starting at the bottom (least
+ * significant bits).
+ */
+ int bi_valid;
+ /* Number of valid bits in bi_buf. All bits above the last valid bit
+ * are always zero.
+ */
+
+} FAR deflate_state;
+
+/* Output a byte on the stream.
+ * IN assertion: there is enough room in pending_buf.
+ */
+#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
+
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+#define MAX_DIST(s) ((s)->w_size-MIN_LOOKAHEAD)
+/* In order to simplify the code, particularly on 16 bit machines, match
+ * distances are limited to MAX_DIST instead of WSIZE.
+ */
+
+ /* in trees.c */
+void _tr_init OF((deflate_state *s));
+int _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
+void _tr_flush_block OF((deflate_state *s, charf *buf, ulg stored_len,
+ int eof));
+void _tr_align OF((deflate_state *s));
+void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
+ int eof));
+
+#define d_code(dist) \
+ ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
+/* Mapping from a distance to a distance code. dist is the distance - 1 and
+ * must not have side effects. _dist_code[256] and _dist_code[257] are never
+ * used.
+ */
+
+#ifndef DEBUG
+/* Inline versions of _tr_tally for speed: */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+ extern uch _length_code[];
+ extern uch _dist_code[];
+#else
+ extern const uch _length_code[];
+ extern const uch _dist_code[];
+#endif
+
+# define _tr_tally_lit(s, c, flush) \
+ { uch cc = (c); \
+ s->d_buf[s->last_lit] = 0; \
+ s->l_buf[s->last_lit++] = cc; \
+ s->dyn_ltree[cc].Freq++; \
+ flush = (s->last_lit == s->lit_bufsize-1); \
+ }
+# define _tr_tally_dist(s, distance, length, flush) \
+ { uch len = (length); \
+ ush dist = (distance); \
+ s->d_buf[s->last_lit] = dist; \
+ s->l_buf[s->last_lit++] = len; \
+ dist--; \
+ s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
+ s->dyn_dtree[d_code(dist)].Freq++; \
+ flush = (s->last_lit == s->lit_bufsize-1); \
+ }
+#else
+# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
+# define _tr_tally_dist(s, distance, length, flush) \
+ flush = _tr_tally(s, distance, length)
+#endif
+
+#endif /* DEFLATE_H */
--- /dev/null
+/* example.c -- usage example of the zlib compression library
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#include <stdio.h>
+#include "zlib.h"
+
+#ifdef STDC
+# include <string.h>
+# include <stdlib.h>
+#endif
+
+#if defined(VMS) || defined(RISCOS)
+# define TESTFILE "foo-gz"
+#else
+# define TESTFILE "foo.gz"
+#endif
+
+#define CHECK_ERR(err, msg) { \
+ if (err != Z_OK) { \
+ fprintf(stderr, "%s error: %d\n", msg, err); \
+ exit(1); \
+ } \
+}
+
+const char hello[] = "hello, hello!";
+/* "hello world" would be more standard, but the repeated "hello"
+ * stresses the compression code better, sorry...
+ */
+
+const char dictionary[] = "hello";
+uLong dictId; /* Adler32 value of the dictionary */
+
+void test_compress OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_gzio OF((const char *fname,
+ Byte *uncompr, uLong uncomprLen));
+void test_deflate OF((Byte *compr, uLong comprLen));
+void test_inflate OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_large_deflate OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_large_inflate OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_flush OF((Byte *compr, uLong *comprLen));
+void test_sync OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+void test_dict_deflate OF((Byte *compr, uLong comprLen));
+void test_dict_inflate OF((Byte *compr, uLong comprLen,
+ Byte *uncompr, uLong uncomprLen));
+int main OF((int argc, char *argv[]));
+
+/* ===========================================================================
+ * Test compress() and uncompress()
+ */
+void test_compress(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{
+ int err;
+ uLong len = (uLong)strlen(hello)+1;
+
+ err = compress(compr, &comprLen, (const Bytef*)hello, len);
+ CHECK_ERR(err, "compress");
+
+ strcpy((char*)uncompr, "garbage");
+
+ err = uncompress(uncompr, &uncomprLen, compr, comprLen);
+ CHECK_ERR(err, "uncompress");
+
+ if (strcmp((char*)uncompr, hello)) {
+ fprintf(stderr, "bad uncompress\n");
+ exit(1);
+ } else {
+ printf("uncompress(): %s\n", (char *)uncompr);
+ }
+}
+
+/* ===========================================================================
+ * Test read/write of .gz files
+ */
+void test_gzio(fname, uncompr, uncomprLen)
+ const char *fname; /* compressed file name */
+ Byte *uncompr;
+ uLong uncomprLen;
+{
+#ifdef NO_GZCOMPRESS
+ fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
+#else
+ int err;
+ int len = (int)strlen(hello)+1;
+ gzFile file;
+ z_off_t pos;
+
+ file = gzopen(fname, "wb");
+ if (file == NULL) {
+ fprintf(stderr, "gzopen error\n");
+ exit(1);
+ }
+ gzputc(file, 'h');
+ if (gzputs(file, "ello") != 4) {
+ fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
+ exit(1);
+ }
+ if (gzprintf(file, ", %s!", "hello") != 8) {
+ fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
+ exit(1);
+ }
+ gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
+ gzclose(file);
+
+ file = gzopen(fname, "rb");
+ if (file == NULL) {
+ fprintf(stderr, "gzopen error\n");
+ exit(1);
+ }
+ strcpy((char*)uncompr, "garbage");
+
+ if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {
+ fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
+ exit(1);
+ }
+ if (strcmp((char*)uncompr, hello)) {
+ fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
+ exit(1);
+ } else {
+ printf("gzread(): %s\n", (char*)uncompr);
+ }
+
+ pos = gzseek(file, -8L, SEEK_CUR);
+ if (pos != 6 || gztell(file) != pos) {
+ fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
+ (long)pos, (long)gztell(file));
+ exit(1);
+ }
+
+ if (gzgetc(file) != ' ') {
+ fprintf(stderr, "gzgetc error\n");
+ exit(1);
+ }
+
+ if (gzungetc(' ', file) != ' ') {
+ fprintf(stderr, "gzungetc error\n");
+ exit(1);
+ }
+
+ gzgets(file, (char*)uncompr, (int)uncomprLen);
+ if (strlen((char*)uncompr) != 7) { /* " hello!" */
+ fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
+ exit(1);
+ }
+ if (strcmp((char*)uncompr, hello + 6)) {
+ fprintf(stderr, "bad gzgets after gzseek\n");
+ exit(1);
+ } else {
+ printf("gzgets() after gzseek: %s\n", (char*)uncompr);
+ }
+
+ gzclose(file);
+#endif
+}
+
+/* ===========================================================================
+ * Test deflate() with small buffers
+ */
+void test_deflate(compr, comprLen)
+ Byte *compr;
+ uLong comprLen;
+{
+ z_stream c_stream; /* compression stream */
+ int err;
+ uLong len = (uLong)strlen(hello)+1;
+
+ c_stream.zalloc = (alloc_func)0;
+ c_stream.zfree = (free_func)0;
+ c_stream.opaque = (voidpf)0;
+
+ err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
+ CHECK_ERR(err, "deflateInit");
+
+ c_stream.next_in = (Bytef*)hello;
+ c_stream.next_out = compr;
+
+ while (c_stream.total_in != len && c_stream.total_out < comprLen) {
+ c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
+ err = deflate(&c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "deflate");
+ }
+ /* Finish the stream, still forcing small buffers: */
+ for (;;) {
+ c_stream.avail_out = 1;
+ err = deflate(&c_stream, Z_FINISH);
+ if (err == Z_STREAM_END) break;
+ CHECK_ERR(err, "deflate");
+ }
+
+ err = deflateEnd(&c_stream);
+ CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with small buffers
+ */
+void test_inflate(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{
+ int err;
+ z_stream d_stream; /* decompression stream */
+
+ strcpy((char*)uncompr, "garbage");
+
+ d_stream.zalloc = (alloc_func)0;
+ d_stream.zfree = (free_func)0;
+ d_stream.opaque = (voidpf)0;
+
+ d_stream.next_in = compr;
+ d_stream.avail_in = 0;
+ d_stream.next_out = uncompr;
+
+ err = inflateInit(&d_stream);
+ CHECK_ERR(err, "inflateInit");
+
+ while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
+ d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
+ err = inflate(&d_stream, Z_NO_FLUSH);
+ if (err == Z_STREAM_END) break;
+ CHECK_ERR(err, "inflate");
+ }
+
+ err = inflateEnd(&d_stream);
+ CHECK_ERR(err, "inflateEnd");
+
+ if (strcmp((char*)uncompr, hello)) {
+ fprintf(stderr, "bad inflate\n");
+ exit(1);
+ } else {
+ printf("inflate(): %s\n", (char *)uncompr);
+ }
+}
+
+/* ===========================================================================
+ * Test deflate() with large buffers and dynamic change of compression level
+ */
+void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{
+ z_stream c_stream; /* compression stream */
+ int err;
+
+ c_stream.zalloc = (alloc_func)0;
+ c_stream.zfree = (free_func)0;
+ c_stream.opaque = (voidpf)0;
+
+ err = deflateInit(&c_stream, Z_BEST_SPEED);
+ CHECK_ERR(err, "deflateInit");
+
+ c_stream.next_out = compr;
+ c_stream.avail_out = (uInt)comprLen;
+
+ /* At this point, uncompr is still mostly zeroes, so it should compress
+ * very well:
+ */
+ c_stream.next_in = uncompr;
+ c_stream.avail_in = (uInt)uncomprLen;
+ err = deflate(&c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "deflate");
+ if (c_stream.avail_in != 0) {
+ fprintf(stderr, "deflate not greedy\n");
+ exit(1);
+ }
+
+ /* Feed in already compressed data and switch to no compression: */
+ deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
+ c_stream.next_in = compr;
+ c_stream.avail_in = (uInt)comprLen/2;
+ err = deflate(&c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "deflate");
+
+ /* Switch back to compressing mode: */
+ deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
+ c_stream.next_in = uncompr;
+ c_stream.avail_in = (uInt)uncomprLen;
+ err = deflate(&c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "deflate");
+
+ err = deflate(&c_stream, Z_FINISH);
+ if (err != Z_STREAM_END) {
+ fprintf(stderr, "deflate should report Z_STREAM_END\n");
+ exit(1);
+ }
+ err = deflateEnd(&c_stream);
+ CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with large buffers
+ */
+void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{
+ int err;
+ z_stream d_stream; /* decompression stream */
+
+ strcpy((char*)uncompr, "garbage");
+
+ d_stream.zalloc = (alloc_func)0;
+ d_stream.zfree = (free_func)0;
+ d_stream.opaque = (voidpf)0;
+
+ d_stream.next_in = compr;
+ d_stream.avail_in = (uInt)comprLen;
+
+ err = inflateInit(&d_stream);
+ CHECK_ERR(err, "inflateInit");
+
+ for (;;) {
+ d_stream.next_out = uncompr; /* discard the output */
+ d_stream.avail_out = (uInt)uncomprLen;
+ err = inflate(&d_stream, Z_NO_FLUSH);
+ if (err == Z_STREAM_END) break;
+ CHECK_ERR(err, "large inflate");
+ }
+
+ err = inflateEnd(&d_stream);
+ CHECK_ERR(err, "inflateEnd");
+
+ if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
+ fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
+ exit(1);
+ } else {
+ printf("large_inflate(): OK\n");
+ }
+}
+
+/* ===========================================================================
+ * Test deflate() with full flush
+ */
+void test_flush(compr, comprLen)
+ Byte *compr;
+ uLong *comprLen;
+{
+ z_stream c_stream; /* compression stream */
+ int err;
+ uInt len = (uInt)strlen(hello)+1;
+
+ c_stream.zalloc = (alloc_func)0;
+ c_stream.zfree = (free_func)0;
+ c_stream.opaque = (voidpf)0;
+
+ err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
+ CHECK_ERR(err, "deflateInit");
+
+ c_stream.next_in = (Bytef*)hello;
+ c_stream.next_out = compr;
+ c_stream.avail_in = 3;
+ c_stream.avail_out = (uInt)*comprLen;
+ err = deflate(&c_stream, Z_FULL_FLUSH);
+ CHECK_ERR(err, "deflate");
+
+ compr[3]++; /* force an error in first compressed block */
+ c_stream.avail_in = len - 3;
+
+ err = deflate(&c_stream, Z_FINISH);
+ if (err != Z_STREAM_END) {
+ CHECK_ERR(err, "deflate");
+ }
+ err = deflateEnd(&c_stream);
+ CHECK_ERR(err, "deflateEnd");
+
+ *comprLen = c_stream.total_out;
+}
+
+/* ===========================================================================
+ * Test inflateSync()
+ */
+void test_sync(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{
+ int err;
+ z_stream d_stream; /* decompression stream */
+
+ strcpy((char*)uncompr, "garbage");
+
+ d_stream.zalloc = (alloc_func)0;
+ d_stream.zfree = (free_func)0;
+ d_stream.opaque = (voidpf)0;
+
+ d_stream.next_in = compr;
+ d_stream.avail_in = 2; /* just read the zlib header */
+
+ err = inflateInit(&d_stream);
+ CHECK_ERR(err, "inflateInit");
+
+ d_stream.next_out = uncompr;
+ d_stream.avail_out = (uInt)uncomprLen;
+
+ inflate(&d_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, "inflate");
+
+ d_stream.avail_in = (uInt)comprLen-2; /* read all compressed data */
+ err = inflateSync(&d_stream); /* but skip the damaged part */
+ CHECK_ERR(err, "inflateSync");
+
+ err = inflate(&d_stream, Z_FINISH);
+ if (err != Z_DATA_ERROR) {
+ fprintf(stderr, "inflate should report DATA_ERROR\n");
+ /* Because of incorrect adler32 */
+ exit(1);
+ }
+ err = inflateEnd(&d_stream);
+ CHECK_ERR(err, "inflateEnd");
+
+ printf("after inflateSync(): hel%s\n", (char *)uncompr);
+}
+
+/* ===========================================================================
+ * Test deflate() with preset dictionary
+ */
+void test_dict_deflate(compr, comprLen)
+ Byte *compr;
+ uLong comprLen;
+{
+ z_stream c_stream; /* compression stream */
+ int err;
+
+ c_stream.zalloc = (alloc_func)0;
+ c_stream.zfree = (free_func)0;
+ c_stream.opaque = (voidpf)0;
+
+ err = deflateInit(&c_stream, Z_BEST_COMPRESSION);
+ CHECK_ERR(err, "deflateInit");
+
+ err = deflateSetDictionary(&c_stream,
+ (const Bytef*)dictionary, sizeof(dictionary));
+ CHECK_ERR(err, "deflateSetDictionary");
+
+ dictId = c_stream.adler;
+ c_stream.next_out = compr;
+ c_stream.avail_out = (uInt)comprLen;
+
+ c_stream.next_in = (Bytef*)hello;
+ c_stream.avail_in = (uInt)strlen(hello)+1;
+
+ err = deflate(&c_stream, Z_FINISH);
+ if (err != Z_STREAM_END) {
+ fprintf(stderr, "deflate should report Z_STREAM_END\n");
+ exit(1);
+ }
+ err = deflateEnd(&c_stream);
+ CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with a preset dictionary
+ */
+void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
+ Byte *compr, *uncompr;
+ uLong comprLen, uncomprLen;
+{
+ int err;
+ z_stream d_stream; /* decompression stream */
+
+ strcpy((char*)uncompr, "garbage");
+
+ d_stream.zalloc = (alloc_func)0;
+ d_stream.zfree = (free_func)0;
+ d_stream.opaque = (voidpf)0;
+
+ d_stream.next_in = compr;
+ d_stream.avail_in = (uInt)comprLen;
+
+ err = inflateInit(&d_stream);
+ CHECK_ERR(err, "inflateInit");
+
+ d_stream.next_out = uncompr;
+ d_stream.avail_out = (uInt)uncomprLen;
+
+ for (;;) {
+ err = inflate(&d_stream, Z_NO_FLUSH);
+ if (err == Z_STREAM_END) break;
+ if (err == Z_NEED_DICT) {
+ if (d_stream.adler != dictId) {
+ fprintf(stderr, "unexpected dictionary");
+ exit(1);
+ }
+ err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
+ sizeof(dictionary));
+ }
+ CHECK_ERR(err, "inflate with dict");
+ }
+
+ err = inflateEnd(&d_stream);
+ CHECK_ERR(err, "inflateEnd");
+
+ if (strcmp((char*)uncompr, hello)) {
+ fprintf(stderr, "bad inflate with dict\n");
+ exit(1);
+ } else {
+ printf("inflate with dictionary: %s\n", (char *)uncompr);
+ }
+}
+
+/* ===========================================================================
+ * Usage: example [output.gz [input.gz]]
+ */
+
+int main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ Byte *compr, *uncompr;
+ uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
+ uLong uncomprLen = comprLen;
+ static const char* myVersion = ZLIB_VERSION;
+
+ if (zlibVersion()[0] != myVersion[0]) {
+ fprintf(stderr, "incompatible zlib version\n");
+ exit(1);
+
+ } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
+ fprintf(stderr, "warning: different zlib version\n");
+ }
+
+ printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",
+ ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());
+
+ compr = (Byte*)calloc((uInt)comprLen, 1);
+ uncompr = (Byte*)calloc((uInt)uncomprLen, 1);
+ /* compr and uncompr are cleared to avoid reading uninitialized
+ * data and to ensure that uncompr compresses well.
+ */
+ if (compr == Z_NULL || uncompr == Z_NULL) {
+ printf("out of memory\n");
+ exit(1);
+ }
+ test_compress(compr, comprLen, uncompr, uncomprLen);
+
+ test_gzio((argc > 1 ? argv[1] : TESTFILE),
+ uncompr, uncomprLen);
+
+ test_deflate(compr, comprLen);
+ test_inflate(compr, comprLen, uncompr, uncomprLen);
+
+ test_large_deflate(compr, comprLen, uncompr, uncomprLen);
+ test_large_inflate(compr, comprLen, uncompr, uncomprLen);
+
+ test_flush(compr, &comprLen);
+ test_sync(compr, comprLen, uncompr, uncomprLen);
+ comprLen = uncomprLen;
+
+ test_dict_deflate(compr, comprLen);
+ test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
+
+ free(compr);
+ free(uncompr);
+
+ return 0;
+}
--- /dev/null
+/* gzio.c -- IO on .gz files
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
+ */
+
+/* @(#) $Id$ */
+
+#include <stdio.h>
+
+#include "zutil.h"
+
+#ifdef NO_DEFLATE /* for compatibility with old definition */
+# define NO_GZCOMPRESS
+#endif
+
+#ifndef NO_DUMMY_DECL
+struct internal_state {int dummy;}; /* for buggy compilers */
+#endif
+
+#ifndef Z_BUFSIZE
+# ifdef MAXSEG_64K
+# define Z_BUFSIZE 4096 /* minimize memory usage for 16-bit DOS */
+# else
+# define Z_BUFSIZE 16384
+# endif
+#endif
+#ifndef Z_PRINTF_BUFSIZE
+# define Z_PRINTF_BUFSIZE 4096
+#endif
+
+#ifdef __MVS__
+# pragma map (fdopen , "\174\174FDOPEN")
+ FILE *fdopen(int, const char *);
+#endif
+
+#ifndef STDC
+extern voidp malloc OF((uInt size));
+extern void free OF((voidpf ptr));
+#endif
+
+#define ALLOC(size) malloc(size)
+#define TRYFREE(p) {if (p) free(p);}
+
+static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
+
+/* gzip flag byte */
+#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
+#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */
+#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
+#define COMMENT 0x10 /* bit 4 set: file comment present */
+#define RESERVED 0xE0 /* bits 5..7: reserved */
+
+typedef struct gz_stream {
+ z_stream stream;
+ int z_err; /* error code for last stream operation */
+ int z_eof; /* set if end of input file */
+ FILE *file; /* .gz file */
+ Byte *inbuf; /* input buffer */
+ Byte *outbuf; /* output buffer */
+ uLong crc; /* crc32 of uncompressed data */
+ char *msg; /* error message */
+ char *path; /* path name for debugging only */
+ int transparent; /* 1 if input file is not a .gz file */
+ char mode; /* 'w' or 'r' */
+ z_off_t start; /* start of compressed data in file (header skipped) */
+ z_off_t in; /* bytes into deflate or inflate */
+ z_off_t out; /* bytes out of deflate or inflate */
+ int back; /* one character push-back */
+ int last; /* true if push-back is last character */
+} gz_stream;
+
+
+local gzFile gz_open OF((const char *path, const char *mode, int fd));
+local int do_flush OF((gzFile file, int flush));
+local int get_byte OF((gz_stream *s));
+local void check_header OF((gz_stream *s));
+local int destroy OF((gz_stream *s));
+local void putLong OF((FILE *file, uLong x));
+local uLong getLong OF((gz_stream *s));
+
+/* ===========================================================================
+ Opens a gzip (.gz) file for reading or writing. The mode parameter
+ is as in fopen ("rb" or "wb"). The file is given either by file descriptor
+ or path name (if fd == -1).
+ gz_open returns NULL if the file could not be opened or if there was
+ insufficient memory to allocate the (de)compression state; errno
+ can be checked to distinguish the two cases (if errno is zero, the
+ zlib error is Z_MEM_ERROR).
+*/
+local gzFile gz_open (path, mode, fd)
+ const char *path;
+ const char *mode;
+ int fd;
+{
+ int err;
+ int level = Z_DEFAULT_COMPRESSION; /* compression level */
+ int strategy = Z_DEFAULT_STRATEGY; /* compression strategy */
+ char *p = (char*)mode;
+ gz_stream *s;
+ char fmode[80]; /* copy of mode, without the compression level */
+ char *m = fmode;
+
+ if (!path || !mode) return Z_NULL;
+
+ s = (gz_stream *)ALLOC(sizeof(gz_stream));
+ if (!s) return Z_NULL;
+
+ s->stream.zalloc = (alloc_func)0;
+ s->stream.zfree = (free_func)0;
+ s->stream.opaque = (voidpf)0;
+ s->stream.next_in = s->inbuf = Z_NULL;
+ s->stream.next_out = s->outbuf = Z_NULL;
+ s->stream.avail_in = s->stream.avail_out = 0;
+ s->file = NULL;
+ s->z_err = Z_OK;
+ s->z_eof = 0;
+ s->in = 0;
+ s->out = 0;
+ s->back = EOF;
+ s->crc = crc32(0L, Z_NULL, 0);
+ s->msg = NULL;
+ s->transparent = 0;
+
+ s->path = (char*)ALLOC(strlen(path)+1);
+ if (s->path == NULL) {
+ return destroy(s), (gzFile)Z_NULL;
+ }
+ strcpy(s->path, path); /* do this early for debugging */
+
+ s->mode = '\0';
+ do {
+ if (*p == 'r') s->mode = 'r';
+ if (*p == 'w' || *p == 'a') s->mode = 'w';
+ if (*p >= '0' && *p <= '9') {
+ level = *p - '0';
+ } else if (*p == 'f') {
+ strategy = Z_FILTERED;
+ } else if (*p == 'h') {
+ strategy = Z_HUFFMAN_ONLY;
+ } else if (*p == 'R') {
+ strategy = Z_RLE;
+ } else {
+ *m++ = *p; /* copy the mode */
+ }
+ } while (*p++ && m != fmode + sizeof(fmode));
+ if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL;
+
+ if (s->mode == 'w') {
+#ifdef NO_GZCOMPRESS
+ err = Z_STREAM_ERROR;
+#else
+ err = deflateInit2(&(s->stream), level,
+ Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, strategy);
+ /* windowBits is passed < 0 to suppress zlib header */
+
+ s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
+#endif
+ if (err != Z_OK || s->outbuf == Z_NULL) {
+ return destroy(s), (gzFile)Z_NULL;
+ }
+ } else {
+ s->stream.next_in = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE);
+
+ err = inflateInit2(&(s->stream), -MAX_WBITS);
+ /* windowBits is passed < 0 to tell that there is no zlib header.
+ * Note that in this case inflate *requires* an extra "dummy" byte
+ * after the compressed stream in order to complete decompression and
+ * return Z_STREAM_END. Here the gzip CRC32 ensures that 4 bytes are
+ * present after the compressed stream.
+ */
+ if (err != Z_OK || s->inbuf == Z_NULL) {
+ return destroy(s), (gzFile)Z_NULL;
+ }
+ }
+ s->stream.avail_out = Z_BUFSIZE;
+
+ errno = 0;
+ s->file = fd < 0 ? F_OPEN(path, fmode) : (FILE*)fdopen(fd, fmode);
+
+ if (s->file == NULL) {
+ return destroy(s), (gzFile)Z_NULL;
+ }
+ if (s->mode == 'w') {
+ /* Write a very simple .gz header:
+ */
+ fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
+ Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
+ s->start = 10L;
+ /* We use 10L instead of ftell(s->file) to because ftell causes an
+ * fflush on some systems. This version of the library doesn't use
+ * start anyway in write mode, so this initialization is not
+ * necessary.
+ */
+ } else {
+ check_header(s); /* skip the .gz header */
+ s->start = ftell(s->file) - s->stream.avail_in;
+ }
+
+ return (gzFile)s;
+}
+
+/* ===========================================================================
+ Opens a gzip (.gz) file for reading or writing.
+*/
+gzFile ZEXPORT gzopen (path, mode)
+ const char *path;
+ const char *mode;
+{
+ return gz_open (path, mode, -1);
+}
+
+/* ===========================================================================
+ Associate a gzFile with the file descriptor fd. fd is not dup'ed here
+ to mimic the behavio(u)r of fdopen.
+*/
+gzFile ZEXPORT gzdopen (fd, mode)
+ int fd;
+ const char *mode;
+{
+ char name[46]; /* allow for up to 128-bit integers */
+
+ if (fd < 0) return (gzFile)Z_NULL;
+ sprintf(name, "<fd:%d>", fd); /* for debugging */
+
+ return gz_open (name, mode, fd);
+}
+
+/* ===========================================================================
+ * Update the compression level and strategy
+ */
+int ZEXPORT gzsetparams (file, level, strategy)
+ gzFile file;
+ int level;
+ int strategy;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+ /* Make room to allow flushing */
+ if (s->stream.avail_out == 0) {
+
+ s->stream.next_out = s->outbuf;
+ if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
+ s->z_err = Z_ERRNO;
+ }
+ s->stream.avail_out = Z_BUFSIZE;
+ }
+
+ return deflateParams (&(s->stream), level, strategy);
+}
+
+/* ===========================================================================
+ Read a byte from a gz_stream; update next_in and avail_in. Return EOF
+ for end of file.
+ IN assertion: the stream s has been sucessfully opened for reading.
+*/
+local int get_byte(s)
+ gz_stream *s;
+{
+ if (s->z_eof) return EOF;
+ if (s->stream.avail_in == 0) {
+ errno = 0;
+ s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+ if (s->stream.avail_in == 0) {
+ s->z_eof = 1;
+ if (ferror(s->file)) s->z_err = Z_ERRNO;
+ return EOF;
+ }
+ s->stream.next_in = s->inbuf;
+ }
+ s->stream.avail_in--;
+ return *(s->stream.next_in)++;
+}
+
+/* ===========================================================================
+ Check the gzip header of a gz_stream opened for reading. Set the stream
+ mode to transparent if the gzip magic header is not present; set s->err
+ to Z_DATA_ERROR if the magic header is present but the rest of the header
+ is incorrect.
+ IN assertion: the stream s has already been created sucessfully;
+ s->stream.avail_in is zero for the first time, but may be non-zero
+ for concatenated .gz files.
+*/
+local void check_header(s)
+ gz_stream *s;
+{
+ int method; /* method byte */
+ int flags; /* flags byte */
+ uInt len;
+ int c;
+
+ /* Assure two bytes in the buffer so we can peek ahead -- handle case
+ where first byte of header is at the end of the buffer after the last
+ gzip segment */
+ len = s->stream.avail_in;
+ if (len < 2) {
+ if (len) s->inbuf[0] = s->stream.next_in[0];
+ errno = 0;
+ len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
+ if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
+ s->stream.avail_in += len;
+ s->stream.next_in = s->inbuf;
+ if (s->stream.avail_in < 2) {
+ s->transparent = s->stream.avail_in;
+ return;
+ }
+ }
+
+ /* Peek ahead to check the gzip magic header */
+ if (s->stream.next_in[0] != gz_magic[0] ||
+ s->stream.next_in[1] != gz_magic[1]) {
+ s->transparent = 1;
+ return;
+ }
+ s->stream.avail_in -= 2;
+ s->stream.next_in += 2;
+
+ /* Check the rest of the gzip header */
+ method = get_byte(s);
+ flags = get_byte(s);
+ if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
+ s->z_err = Z_DATA_ERROR;
+ return;
+ }
+
+ /* Discard time, xflags and OS code: */
+ for (len = 0; len < 6; len++) (void)get_byte(s);
+
+ if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */
+ len = (uInt)get_byte(s);
+ len += ((uInt)get_byte(s))<<8;
+ /* len is garbage if EOF but the loop below will quit anyway */
+ while (len-- != 0 && get_byte(s) != EOF) ;
+ }
+ if ((flags & ORIG_NAME) != 0) { /* skip the original file name */
+ while ((c = get_byte(s)) != 0 && c != EOF) ;
+ }
+ if ((flags & COMMENT) != 0) { /* skip the .gz file comment */
+ while ((c = get_byte(s)) != 0 && c != EOF) ;
+ }
+ if ((flags & HEAD_CRC) != 0) { /* skip the header crc */
+ for (len = 0; len < 2; len++) (void)get_byte(s);
+ }
+ s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK;
+}
+
+ /* ===========================================================================
+ * Cleanup then free the given gz_stream. Return a zlib error code.
+ Try freeing in the reverse order of allocations.
+ */
+local int destroy (s)
+ gz_stream *s;
+{
+ int err = Z_OK;
+
+ if (!s) return Z_STREAM_ERROR;
+
+ TRYFREE(s->msg);
+
+ if (s->stream.state != NULL) {
+ if (s->mode == 'w') {
+#ifdef NO_GZCOMPRESS
+ err = Z_STREAM_ERROR;
+#else
+ err = deflateEnd(&(s->stream));
+#endif
+ } else if (s->mode == 'r') {
+ err = inflateEnd(&(s->stream));
+ }
+ }
+ if (s->file != NULL && fclose(s->file)) {
+#ifdef ESPIPE
+ if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */
+#endif
+ err = Z_ERRNO;
+ }
+ if (s->z_err < 0) err = s->z_err;
+
+ TRYFREE(s->inbuf);
+ TRYFREE(s->outbuf);
+ TRYFREE(s->path);
+ TRYFREE(s);
+ return err;
+}
+
+/* ===========================================================================
+ Reads the given number of uncompressed bytes from the compressed file.
+ gzread returns the number of bytes actually read (0 for end of file).
+*/
+int ZEXPORT gzread (file, buf, len)
+ gzFile file;
+ voidp buf;
+ unsigned len;
+{
+ gz_stream *s = (gz_stream*)file;
+ Bytef *start = (Bytef*)buf; /* starting point for crc computation */
+ Byte *next_out; /* == stream.next_out but not forced far (for MSDOS) */
+
+ if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
+
+ if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1;
+ if (s->z_err == Z_STREAM_END) return 0; /* EOF */
+
+ next_out = (Byte*)buf;
+ s->stream.next_out = (Bytef*)buf;
+ s->stream.avail_out = len;
+
+ if (s->stream.avail_out && s->back != EOF) {
+ *next_out++ = s->back;
+ s->stream.next_out++;
+ s->stream.avail_out--;
+ s->back = EOF;
+ s->out++;
+ start++;
+ if (s->last) {
+ s->z_err = Z_STREAM_END;
+ return 1;
+ }
+ }
+
+ while (s->stream.avail_out != 0) {
+
+ if (s->transparent) {
+ /* Copy first the lookahead bytes: */
+ uInt n = s->stream.avail_in;
+ if (n > s->stream.avail_out) n = s->stream.avail_out;
+ if (n > 0) {
+ zmemcpy(s->stream.next_out, s->stream.next_in, n);
+ next_out += n;
+ s->stream.next_out = next_out;
+ s->stream.next_in += n;
+ s->stream.avail_out -= n;
+ s->stream.avail_in -= n;
+ }
+ if (s->stream.avail_out > 0) {
+ s->stream.avail_out -=
+ (uInt)fread(next_out, 1, s->stream.avail_out, s->file);
+ }
+ len -= s->stream.avail_out;
+ s->in += len;
+ s->out += len;
+ if (len == 0) s->z_eof = 1;
+ return (int)len;
+ }
+ if (s->stream.avail_in == 0 && !s->z_eof) {
+
+ errno = 0;
+ s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+ if (s->stream.avail_in == 0) {
+ s->z_eof = 1;
+ if (ferror(s->file)) {
+ s->z_err = Z_ERRNO;
+ break;
+ }
+ }
+ s->stream.next_in = s->inbuf;
+ }
+ s->in += s->stream.avail_in;
+ s->out += s->stream.avail_out;
+ s->z_err = inflate(&(s->stream), Z_NO_FLUSH);
+ s->in -= s->stream.avail_in;
+ s->out -= s->stream.avail_out;
+
+ if (s->z_err == Z_STREAM_END) {
+ /* Check CRC and original size */
+ s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
+ start = s->stream.next_out;
+
+ if (getLong(s) != s->crc) {
+ s->z_err = Z_DATA_ERROR;
+ } else {
+ (void)getLong(s);
+ /* The uncompressed length returned by above getlong() may be
+ * different from s->out in case of concatenated .gz files.
+ * Check for such files:
+ */
+ check_header(s);
+ if (s->z_err == Z_OK) {
+ inflateReset(&(s->stream));
+ s->crc = crc32(0L, Z_NULL, 0);
+ }
+ }
+ }
+ if (s->z_err != Z_OK || s->z_eof) break;
+ }
+ s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
+
+ if (len == s->stream.avail_out &&
+ (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO))
+ return -1;
+ return (int)(len - s->stream.avail_out);
+}
+
+
+/* ===========================================================================
+ Reads one byte from the compressed file. gzgetc returns this byte
+ or -1 in case of end of file or error.
+*/
+int ZEXPORT gzgetc(file)
+ gzFile file;
+{
+ unsigned char c;
+
+ return gzread(file, &c, 1) == 1 ? c : -1;
+}
+
+
+/* ===========================================================================
+ Push one byte back onto the stream.
+*/
+int ZEXPORT gzungetc(c, file)
+ int c;
+ gzFile file;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'r' || c == EOF || s->back != EOF) return EOF;
+ s->back = c;
+ s->out--;
+ s->last = (s->z_err == Z_STREAM_END);
+ if (s->last) s->z_err = Z_OK;
+ s->z_eof = 0;
+ return c;
+}
+
+
+/* ===========================================================================
+ Reads bytes from the compressed file until len-1 characters are
+ read, or a newline character is read and transferred to buf, or an
+ end-of-file condition is encountered. The string is then terminated
+ with a null character.
+ gzgets returns buf, or Z_NULL in case of error.
+
+ The current implementation is not optimized at all.
+*/
+char * ZEXPORT gzgets(file, buf, len)
+ gzFile file;
+ char *buf;
+ int len;
+{
+ char *b = buf;
+ if (buf == Z_NULL || len <= 0) return Z_NULL;
+
+ while (--len > 0 && gzread(file, buf, 1) == 1 && *buf++ != '\n') ;
+ *buf = '\0';
+ return b == buf && len > 0 ? Z_NULL : b;
+}
+
+
+#ifndef NO_GZCOMPRESS
+/* ===========================================================================
+ Writes the given number of uncompressed bytes into the compressed file.
+ gzwrite returns the number of bytes actually written (0 in case of error).
+*/
+int ZEXPORT gzwrite (file, buf, len)
+ gzFile file;
+ voidpc buf;
+ unsigned len;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+ s->stream.next_in = (Bytef*)buf;
+ s->stream.avail_in = len;
+
+ while (s->stream.avail_in != 0) {
+
+ if (s->stream.avail_out == 0) {
+
+ s->stream.next_out = s->outbuf;
+ if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
+ s->z_err = Z_ERRNO;
+ break;
+ }
+ s->stream.avail_out = Z_BUFSIZE;
+ }
+ s->in += s->stream.avail_in;
+ s->out += s->stream.avail_out;
+ s->z_err = deflate(&(s->stream), Z_NO_FLUSH);
+ s->in -= s->stream.avail_in;
+ s->out -= s->stream.avail_out;
+ if (s->z_err != Z_OK) break;
+ }
+ s->crc = crc32(s->crc, (const Bytef *)buf, len);
+
+ return (int)(len - s->stream.avail_in);
+}
+
+
+/* ===========================================================================
+ Converts, formats, and writes the args to the compressed file under
+ control of the format string, as in fprintf. gzprintf returns the number of
+ uncompressed bytes actually written (0 in case of error).
+*/
+#ifdef STDC
+#include <stdarg.h>
+
+int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
+{
+ char buf[Z_PRINTF_BUFSIZE];
+ va_list va;
+ int len;
+
+ buf[sizeof(buf) - 1] = 0;
+ va_start(va, format);
+#ifdef NO_vsnprintf
+# ifdef HAS_vsprintf_void
+ (void)vsprintf(buf, format, va);
+ va_end(va);
+ for (len = 0; len < sizeof(buf); len++)
+ if (buf[len] == 0) break;
+# else
+ len = vsprintf(buf, format, va);
+ va_end(va);
+# endif
+#else
+# ifdef HAS_vsnprintf_void
+ (void)vsnprintf(buf, sizeof(buf), format, va);
+ va_end(va);
+ len = strlen(buf);
+# else
+ len = vsnprintf(buf, sizeof(buf), format, va);
+ va_end(va);
+# endif
+#endif
+ if (len <= 0 || len >= (int)sizeof(buf) || buf[sizeof(buf) - 1] != 0)
+ return 0;
+ return gzwrite(file, buf, (unsigned)len);
+}
+#else /* not ANSI C */
+
+int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
+ a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
+ gzFile file;
+ const char *format;
+ int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
+ a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
+{
+ char buf[Z_PRINTF_BUFSIZE];
+ int len;
+
+ buf[sizeof(buf) - 1] = 0;
+#ifdef NO_snprintf
+# ifdef HAS_sprintf_void
+ sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ for (len = 0; len < sizeof(buf); len++)
+ if (buf[len] == 0) break;
+# else
+ len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+# endif
+#else
+# ifdef HAS_snprintf_void
+ snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ len = strlen(buf);
+# else
+ len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+# endif
+#endif
+ if (len <= 0 || len >= sizeof(buf) || buf[sizeof(buf) - 1] != 0)
+ return 0;
+ return gzwrite(file, buf, len);
+}
+#endif
+
+/* ===========================================================================
+ Writes c, converted to an unsigned char, into the compressed file.
+ gzputc returns the value that was written, or -1 in case of error.
+*/
+int ZEXPORT gzputc(file, c)
+ gzFile file;
+ int c;
+{
+ unsigned char cc = (unsigned char) c; /* required for big endian systems */
+
+ return gzwrite(file, &cc, 1) == 1 ? (int)cc : -1;
+}
+
+
+/* ===========================================================================
+ Writes the given null-terminated string to the compressed file, excluding
+ the terminating null character.
+ gzputs returns the number of characters written, or -1 in case of error.
+*/
+int ZEXPORT gzputs(file, s)
+ gzFile file;
+ const char *s;
+{
+ return gzwrite(file, (char*)s, (unsigned)strlen(s));
+}
+
+
+/* ===========================================================================
+ Flushes all pending output into the compressed file. The parameter
+ flush is as in the deflate() function.
+*/
+local int do_flush (file, flush)
+ gzFile file;
+ int flush;
+{
+ uInt len;
+ int done = 0;
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+ s->stream.avail_in = 0; /* should be zero already anyway */
+
+ for (;;) {
+ len = Z_BUFSIZE - s->stream.avail_out;
+
+ if (len != 0) {
+ if ((uInt)fwrite(s->outbuf, 1, len, s->file) != len) {
+ s->z_err = Z_ERRNO;
+ return Z_ERRNO;
+ }
+ s->stream.next_out = s->outbuf;
+ s->stream.avail_out = Z_BUFSIZE;
+ }
+ if (done) break;
+ s->out += s->stream.avail_out;
+ s->z_err = deflate(&(s->stream), flush);
+ s->out -= s->stream.avail_out;
+
+ /* Ignore the second of two consecutive flushes: */
+ if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK;
+
+ /* deflate has finished flushing only when it hasn't used up
+ * all the available space in the output buffer:
+ */
+ done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END);
+
+ if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
+ }
+ return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
+}
+
+int ZEXPORT gzflush (file, flush)
+ gzFile file;
+ int flush;
+{
+ gz_stream *s = (gz_stream*)file;
+ int err = do_flush (file, flush);
+
+ if (err) return err;
+ fflush(s->file);
+ return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
+}
+#endif /* NO_GZCOMPRESS */
+
+/* ===========================================================================
+ Sets the starting position for the next gzread or gzwrite on the given
+ compressed file. The offset represents a number of bytes in the
+ gzseek returns the resulting offset location as measured in bytes from
+ the beginning of the uncompressed stream, or -1 in case of error.
+ SEEK_END is not implemented, returns error.
+ In this version of the library, gzseek can be extremely slow.
+*/
+z_off_t ZEXPORT gzseek (file, offset, whence)
+ gzFile file;
+ z_off_t offset;
+ int whence;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || whence == SEEK_END ||
+ s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {
+ return -1L;
+ }
+
+ if (s->mode == 'w') {
+#ifdef NO_GZCOMPRESS
+ return -1L;
+#else
+ if (whence == SEEK_SET) {
+ offset -= s->in;
+ }
+ if (offset < 0) return -1L;
+
+ /* At this point, offset is the number of zero bytes to write. */
+ if (s->inbuf == Z_NULL) {
+ s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
+ if (s->inbuf == Z_NULL) return -1L;
+ zmemzero(s->inbuf, Z_BUFSIZE);
+ }
+ while (offset > 0) {
+ uInt size = Z_BUFSIZE;
+ if (offset < Z_BUFSIZE) size = (uInt)offset;
+
+ size = gzwrite(file, s->inbuf, size);
+ if (size == 0) return -1L;
+
+ offset -= size;
+ }
+ return s->in;
+#endif
+ }
+ /* Rest of function is for reading only */
+
+ /* compute absolute position */
+ if (whence == SEEK_CUR) {
+ offset += s->out;
+ }
+ if (offset < 0) return -1L;
+
+ if (s->transparent) {
+ /* map to fseek */
+ s->back = EOF;
+ s->stream.avail_in = 0;
+ s->stream.next_in = s->inbuf;
+ if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
+
+ s->in = s->out = offset;
+ return offset;
+ }
+
+ /* For a negative seek, rewind and use positive seek */
+ if (offset >= s->out) {
+ offset -= s->out;
+ } else if (gzrewind(file) < 0) {
+ return -1L;
+ }
+ /* offset is now the number of bytes to skip. */
+
+ if (offset != 0 && s->outbuf == Z_NULL) {
+ s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
+ if (s->outbuf == Z_NULL) return -1L;
+ }
+ if (offset && s->back != EOF) {
+ s->back = EOF;
+ s->out++;
+ offset--;
+ if (s->last) s->z_err = Z_STREAM_END;
+ }
+ while (offset > 0) {
+ int size = Z_BUFSIZE;
+ if (offset < Z_BUFSIZE) size = (int)offset;
+
+ size = gzread(file, s->outbuf, (uInt)size);
+ if (size <= 0) return -1L;
+ offset -= size;
+ }
+ return s->out;
+}
+
+/* ===========================================================================
+ Rewinds input file.
+*/
+int ZEXPORT gzrewind (file)
+ gzFile file;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'r') return -1;
+
+ s->z_err = Z_OK;
+ s->z_eof = 0;
+ s->back = EOF;
+ s->stream.avail_in = 0;
+ s->stream.next_in = s->inbuf;
+ s->crc = crc32(0L, Z_NULL, 0);
+ if (!s->transparent) (void)inflateReset(&s->stream);
+ s->in = 0;
+ s->out = 0;
+ return fseek(s->file, s->start, SEEK_SET);
+}
+
+/* ===========================================================================
+ Returns the starting position for the next gzread or gzwrite on the
+ given compressed file. This position represents a number of bytes in the
+ uncompressed data stream.
+*/
+z_off_t ZEXPORT gztell (file)
+ gzFile file;
+{
+ return gzseek(file, 0L, SEEK_CUR);
+}
+
+/* ===========================================================================
+ Returns 1 when EOF has previously been detected reading the given
+ input stream, otherwise zero.
+*/
+int ZEXPORT gzeof (file)
+ gzFile file;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ /* With concatenated compressed files that can have embedded
+ * crc trailers, z_eof is no longer the only/best indicator of EOF
+ * on a gz_stream. Handle end-of-stream error explicitly here.
+ */
+ if (s == NULL || s->mode != 'r') return 0;
+ if (s->z_eof) return 1;
+ return s->z_err == Z_STREAM_END;
+}
+
+/* ===========================================================================
+ Returns 1 if reading and doing so transparently, otherwise zero.
+*/
+int ZEXPORT gzdirect (file)
+ gzFile file;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'r') return 0;
+ return s->transparent;
+}
+
+/* ===========================================================================
+ Outputs a long in LSB order to the given file
+*/
+local void putLong (file, x)
+ FILE *file;
+ uLong x;
+{
+ int n;
+ for (n = 0; n < 4; n++) {
+ fputc((int)(x & 0xff), file);
+ x >>= 8;
+ }
+}
+
+/* ===========================================================================
+ Reads a long in LSB order from the given gz_stream. Sets z_err in case
+ of error.
+*/
+local uLong getLong (s)
+ gz_stream *s;
+{
+ uLong x = (uLong)get_byte(s);
+ int c;
+
+ x += ((uLong)get_byte(s))<<8;
+ x += ((uLong)get_byte(s))<<16;
+ c = get_byte(s);
+ if (c == EOF) s->z_err = Z_DATA_ERROR;
+ x += ((uLong)c)<<24;
+ return x;
+}
+
+/* ===========================================================================
+ Flushes all pending output if necessary, closes the compressed file
+ and deallocates all the (de)compression state.
+*/
+int ZEXPORT gzclose (file)
+ gzFile file;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL) return Z_STREAM_ERROR;
+
+ if (s->mode == 'w') {
+#ifdef NO_GZCOMPRESS
+ return Z_STREAM_ERROR;
+#else
+ if (do_flush (file, Z_FINISH) != Z_OK)
+ return destroy((gz_stream*)file);
+
+ putLong (s->file, s->crc);
+ putLong (s->file, (uLong)(s->in & 0xffffffff));
+#endif
+ }
+ return destroy((gz_stream*)file);
+}
+
+#ifdef STDC
+# define zstrerror(errnum) strerror(errnum)
+#else
+# define zstrerror(errnum) ""
+#endif
+
+/* ===========================================================================
+ Returns the error message for the last error which occurred on the
+ given compressed file. errnum is set to zlib error number. If an
+ error occurred in the file system and not in the compression library,
+ errnum is set to Z_ERRNO and the application may consult errno
+ to get the exact error code.
+*/
+const char * ZEXPORT gzerror (file, errnum)
+ gzFile file;
+ int *errnum;
+{
+ char *m;
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL) {
+ *errnum = Z_STREAM_ERROR;
+ return (const char*)ERR_MSG(Z_STREAM_ERROR);
+ }
+ *errnum = s->z_err;
+ if (*errnum == Z_OK) return (const char*)"";
+
+ m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
+
+ if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
+
+ TRYFREE(s->msg);
+ s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
+ if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR);
+ strcpy(s->msg, s->path);
+ strcat(s->msg, ": ");
+ strcat(s->msg, m);
+ return (const char*)s->msg;
+}
+
+/* ===========================================================================
+ Clear the error and end-of-file flags, and do the same for the real file.
+*/
+void ZEXPORT gzclearerr (file)
+ gzFile file;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL) return;
+ if (s->z_err != Z_STREAM_END) s->z_err = Z_OK;
+ s->z_eof = 0;
+ clearerr(s->file);
+}
--- /dev/null
+/* infback.c -- inflate using a call-back interface
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ This code is largely copied from inflate.c. Normally either infback.o or
+ inflate.o would be linked into an application--not both. The interface
+ with inffast.c is retained so that optimized assembler-coded versions of
+ inflate_fast() can be used with either inflate.c or infback.c.
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+/* function prototypes */
+local void fixedtables OF((struct inflate_state FAR *state));
+
+/*
+ strm provides memory allocation functions in zalloc and zfree, or
+ Z_NULL to use the library memory allocation functions.
+
+ windowBits is in the range 8..15, and window is a user-supplied
+ window and output buffer that is 2**windowBits bytes.
+ */
+int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
+z_streamp strm;
+int windowBits;
+unsigned char FAR *window;
+const char *version;
+int stream_size;
+{
+ struct inflate_state FAR *state;
+
+ if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+ stream_size != (int)(sizeof(z_stream)))
+ return Z_VERSION_ERROR;
+ if (strm == Z_NULL || window == Z_NULL ||
+ windowBits < 8 || windowBits > 15)
+ return Z_STREAM_ERROR;
+ strm->msg = Z_NULL; /* in case we return an error */
+ if (strm->zalloc == (alloc_func)0) {
+ strm->zalloc = zcalloc;
+ strm->opaque = (voidpf)0;
+ }
+ if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+ state = (struct inflate_state FAR *)ZALLOC(strm, 1,
+ sizeof(struct inflate_state));
+ if (state == Z_NULL) return Z_MEM_ERROR;
+ Tracev((stderr, "inflate: allocated\n"));
+ strm->state = (struct internal_state FAR *)state;
+ state->dmax = 32768U;
+ state->wbits = windowBits;
+ state->wsize = 1U << windowBits;
+ state->window = window;
+ state->write = 0;
+ state->whave = 0;
+ return Z_OK;
+}
+
+/*
+ Return state with length and distance decoding tables and index sizes set to
+ fixed code decoding. Normally this returns fixed tables from inffixed.h.
+ If BUILDFIXED is defined, then instead this routine builds the tables the
+ first time it's called, and returns those tables the first time and
+ thereafter. This reduces the size of the code by about 2K bytes, in
+ exchange for a little execution time. However, BUILDFIXED should not be
+ used for threaded applications, since the rewriting of the tables and virgin
+ may not be thread-safe.
+ */
+local void fixedtables(state)
+struct inflate_state FAR *state;
+{
+#ifdef BUILDFIXED
+ static int virgin = 1;
+ static code *lenfix, *distfix;
+ static code fixed[544];
+
+ /* build fixed huffman tables if first call (may not be thread safe) */
+ if (virgin) {
+ unsigned sym, bits;
+ static code *next;
+
+ /* literal/length table */
+ sym = 0;
+ while (sym < 144) state->lens[sym++] = 8;
+ while (sym < 256) state->lens[sym++] = 9;
+ while (sym < 280) state->lens[sym++] = 7;
+ while (sym < 288) state->lens[sym++] = 8;
+ next = fixed;
+ lenfix = next;
+ bits = 9;
+ inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
+
+ /* distance table */
+ sym = 0;
+ while (sym < 32) state->lens[sym++] = 5;
+ distfix = next;
+ bits = 5;
+ inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
+
+ /* do this just once */
+ virgin = 0;
+ }
+#else /* !BUILDFIXED */
+# include "inffixed.h"
+#endif /* BUILDFIXED */
+ state->lencode = lenfix;
+ state->lenbits = 9;
+ state->distcode = distfix;
+ state->distbits = 5;
+}
+
+/* Macros for inflateBack(): */
+
+/* Load returned state from inflate_fast() */
+#define LOAD() \
+ do { \
+ put = strm->next_out; \
+ left = strm->avail_out; \
+ next = strm->next_in; \
+ have = strm->avail_in; \
+ hold = state->hold; \
+ bits = state->bits; \
+ } while (0)
+
+/* Set state from registers for inflate_fast() */
+#define RESTORE() \
+ do { \
+ strm->next_out = put; \
+ strm->avail_out = left; \
+ strm->next_in = next; \
+ strm->avail_in = have; \
+ state->hold = hold; \
+ state->bits = bits; \
+ } while (0)
+
+/* Clear the input bit accumulator */
+#define INITBITS() \
+ do { \
+ hold = 0; \
+ bits = 0; \
+ } while (0)
+
+/* Assure that some input is available. If input is requested, but denied,
+ then return a Z_BUF_ERROR from inflateBack(). */
+#define PULL() \
+ do { \
+ if (have == 0) { \
+ have = in(in_desc, &next); \
+ if (have == 0) { \
+ next = Z_NULL; \
+ ret = Z_BUF_ERROR; \
+ goto inf_leave; \
+ } \
+ } \
+ } while (0)
+
+/* Get a byte of input into the bit accumulator, or return from inflateBack()
+ with an error if there is no input available. */
+#define PULLBYTE() \
+ do { \
+ PULL(); \
+ have--; \
+ hold += (unsigned long)(*next++) << bits; \
+ bits += 8; \
+ } while (0)
+
+/* Assure that there are at least n bits in the bit accumulator. If there is
+ not enough available input to do that, then return from inflateBack() with
+ an error. */
+#define NEEDBITS(n) \
+ do { \
+ while (bits < (unsigned)(n)) \
+ PULLBYTE(); \
+ } while (0)
+
+/* Return the low n bits of the bit accumulator (n < 16) */
+#define BITS(n) \
+ ((unsigned)hold & ((1U << (n)) - 1))
+
+/* Remove n bits from the bit accumulator */
+#define DROPBITS(n) \
+ do { \
+ hold >>= (n); \
+ bits -= (unsigned)(n); \
+ } while (0)
+
+/* Remove zero to seven bits as needed to go to a byte boundary */
+#define BYTEBITS() \
+ do { \
+ hold >>= bits & 7; \
+ bits -= bits & 7; \
+ } while (0)
+
+/* Assure that some output space is available, by writing out the window
+ if it's full. If the write fails, return from inflateBack() with a
+ Z_BUF_ERROR. */
+#define ROOM() \
+ do { \
+ if (left == 0) { \
+ put = state->window; \
+ left = state->wsize; \
+ state->whave = left; \
+ if (out(out_desc, put, left)) { \
+ ret = Z_BUF_ERROR; \
+ goto inf_leave; \
+ } \
+ } \
+ } while (0)
+
+/*
+ strm provides the memory allocation functions and window buffer on input,
+ and provides information on the unused input on return. For Z_DATA_ERROR
+ returns, strm will also provide an error message.
+
+ in() and out() are the call-back input and output functions. When
+ inflateBack() needs more input, it calls in(). When inflateBack() has
+ filled the window with output, or when it completes with data in the
+ window, it calls out() to write out the data. The application must not
+ change the provided input until in() is called again or inflateBack()
+ returns. The application must not change the window/output buffer until
+ inflateBack() returns.
+
+ in() and out() are called with a descriptor parameter provided in the
+ inflateBack() call. This parameter can be a structure that provides the
+ information required to do the read or write, as well as accumulated
+ information on the input and output such as totals and check values.
+
+ in() should return zero on failure. out() should return non-zero on
+ failure. If either in() or out() fails, than inflateBack() returns a
+ Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it
+ was in() or out() that caused in the error. Otherwise, inflateBack()
+ returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
+ error, or Z_MEM_ERROR if it could not allocate memory for the state.
+ inflateBack() can also return Z_STREAM_ERROR if the input parameters
+ are not correct, i.e. strm is Z_NULL or the state was not initialized.
+ */
+int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
+z_streamp strm;
+in_func in;
+void FAR *in_desc;
+out_func out;
+void FAR *out_desc;
+{
+ struct inflate_state FAR *state;
+ unsigned char FAR *next; /* next input */
+ unsigned char FAR *put; /* next output */
+ unsigned have, left; /* available input and output */
+ unsigned long hold; /* bit buffer */
+ unsigned bits; /* bits in bit buffer */
+ unsigned copy; /* number of stored or match bytes to copy */
+ unsigned char FAR *from; /* where to copy match bytes from */
+ code this; /* current decoding table entry */
+ code last; /* parent table entry */
+ unsigned len; /* length to copy for repeats, bits to drop */
+ int ret; /* return code */
+ static const unsigned short order[19] = /* permutation of code lengths */
+ {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+
+ /* Check that the strm exists and that the state was initialized */
+ if (strm == Z_NULL || strm->state == Z_NULL)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+
+ /* Reset the state */
+ strm->msg = Z_NULL;
+ state->mode = TYPE;
+ state->last = 0;
+ state->whave = 0;
+ next = strm->next_in;
+ have = next != Z_NULL ? strm->avail_in : 0;
+ hold = 0;
+ bits = 0;
+ put = state->window;
+ left = state->wsize;
+
+ /* Inflate until end of block marked as last */
+ for (;;)
+ switch (state->mode) {
+ case TYPE:
+ /* determine and dispatch block type */
+ if (state->last) {
+ BYTEBITS();
+ state->mode = DONE;
+ break;
+ }
+ NEEDBITS(3);
+ state->last = BITS(1);
+ DROPBITS(1);
+ switch (BITS(2)) {
+ case 0: /* stored block */
+ Tracev((stderr, "inflate: stored block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = STORED;
+ break;
+ case 1: /* fixed block */
+ fixedtables(state);
+ Tracev((stderr, "inflate: fixed codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = LEN; /* decode codes */
+ break;
+ case 2: /* dynamic block */
+ Tracev((stderr, "inflate: dynamic codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = TABLE;
+ break;
+ case 3:
+ strm->msg = (char *)"invalid block type";
+ state->mode = BAD;
+ }
+ DROPBITS(2);
+ break;
+
+ case STORED:
+ /* get and verify stored block length */
+ BYTEBITS(); /* go to byte boundary */
+ NEEDBITS(32);
+ if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
+ strm->msg = (char *)"invalid stored block lengths";
+ state->mode = BAD;
+ break;
+ }
+ state->length = (unsigned)hold & 0xffff;
+ Tracev((stderr, "inflate: stored length %u\n",
+ state->length));
+ INITBITS();
+
+ /* copy stored block from input to output */
+ while (state->length != 0) {
+ copy = state->length;
+ PULL();
+ ROOM();
+ if (copy > have) copy = have;
+ if (copy > left) copy = left;
+ zmemcpy(put, next, copy);
+ have -= copy;
+ next += copy;
+ left -= copy;
+ put += copy;
+ state->length -= copy;
+ }
+ Tracev((stderr, "inflate: stored end\n"));
+ state->mode = TYPE;
+ break;
+
+ case TABLE:
+ /* get dynamic table entries descriptor */
+ NEEDBITS(14);
+ state->nlen = BITS(5) + 257;
+ DROPBITS(5);
+ state->ndist = BITS(5) + 1;
+ DROPBITS(5);
+ state->ncode = BITS(4) + 4;
+ DROPBITS(4);
+#ifndef PKZIP_BUG_WORKAROUND
+ if (state->nlen > 286 || state->ndist > 30) {
+ strm->msg = (char *)"too many length or distance symbols";
+ state->mode = BAD;
+ break;
+ }
+#endif
+ Tracev((stderr, "inflate: table sizes ok\n"));
+
+ /* get code length code lengths (not a typo) */
+ state->have = 0;
+ while (state->have < state->ncode) {
+ NEEDBITS(3);
+ state->lens[order[state->have++]] = (unsigned short)BITS(3);
+ DROPBITS(3);
+ }
+ while (state->have < 19)
+ state->lens[order[state->have++]] = 0;
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 7;
+ ret = inflate_table(CODES, state->lens, 19, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid code lengths set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: code lengths ok\n"));
+
+ /* get length and distance code code lengths */
+ state->have = 0;
+ while (state->have < state->nlen + state->ndist) {
+ for (;;) {
+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.val < 16) {
+ NEEDBITS(this.bits);
+ DROPBITS(this.bits);
+ state->lens[state->have++] = this.val;
+ }
+ else {
+ if (this.val == 16) {
+ NEEDBITS(this.bits + 2);
+ DROPBITS(this.bits);
+ if (state->have == 0) {
+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ len = (unsigned)(state->lens[state->have - 1]);
+ copy = 3 + BITS(2);
+ DROPBITS(2);
+ }
+ else if (this.val == 17) {
+ NEEDBITS(this.bits + 3);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 3 + BITS(3);
+ DROPBITS(3);
+ }
+ else {
+ NEEDBITS(this.bits + 7);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 11 + BITS(7);
+ DROPBITS(7);
+ }
+ if (state->have + copy > state->nlen + state->ndist) {
+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ while (copy--)
+ state->lens[state->have++] = (unsigned short)len;
+ }
+ }
+
+ /* handle error breaks in while */
+ if (state->mode == BAD) break;
+
+ /* build code tables */
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 9;
+ ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid literal/lengths set";
+ state->mode = BAD;
+ break;
+ }
+ state->distcode = (code const FAR *)(state->next);
+ state->distbits = 6;
+ ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
+ &(state->next), &(state->distbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid distances set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: codes ok\n"));
+ state->mode = LEN;
+
+ case LEN:
+ /* use inflate_fast() if we have enough input and output */
+ if (have >= 6 && left >= 258) {
+ RESTORE();
+ if (state->whave < state->wsize)
+ state->whave = state->wsize - left;
+ inflate_fast(strm, state->wsize);
+ LOAD();
+ break;
+ }
+
+ /* get a literal, length, or end-of-block code */
+ for (;;) {
+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.op && (this.op & 0xf0) == 0) {
+ last = this;
+ for (;;) {
+ this = state->lencode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ state->length = (unsigned)this.val;
+
+ /* process literal */
+ if (this.op == 0) {
+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ ROOM();
+ *put++ = (unsigned char)(state->length);
+ left--;
+ state->mode = LEN;
+ break;
+ }
+
+ /* process end of block */
+ if (this.op & 32) {
+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
+ break;
+ }
+
+ /* invalid code */
+ if (this.op & 64) {
+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+
+ /* length code -- get extra bits, if any */
+ state->extra = (unsigned)(this.op) & 15;
+ if (state->extra != 0) {
+ NEEDBITS(state->extra);
+ state->length += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ Tracevv((stderr, "inflate: length %u\n", state->length));
+
+ /* get distance code */
+ for (;;) {
+ this = state->distcode[BITS(state->distbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if ((this.op & 0xf0) == 0) {
+ last = this;
+ for (;;) {
+ this = state->distcode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ if (this.op & 64) {
+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ state->offset = (unsigned)this.val;
+
+ /* get distance extra bits, if any */
+ state->extra = (unsigned)(this.op) & 15;
+ if (state->extra != 0) {
+ NEEDBITS(state->extra);
+ state->offset += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ if (state->offset > state->wsize - (state->whave < state->wsize ?
+ left : 0)) {
+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ Tracevv((stderr, "inflate: distance %u\n", state->offset));
+
+ /* copy match from window to output */
+ do {
+ ROOM();
+ copy = state->wsize - state->offset;
+ if (copy < left) {
+ from = put + copy;
+ copy = left - copy;
+ }
+ else {
+ from = put - state->offset;
+ copy = left;
+ }
+ if (copy > state->length) copy = state->length;
+ state->length -= copy;
+ left -= copy;
+ do {
+ *put++ = *from++;
+ } while (--copy);
+ } while (state->length != 0);
+ break;
+
+ case DONE:
+ /* inflate stream terminated properly -- write leftover output */
+ ret = Z_STREAM_END;
+ if (left < state->wsize) {
+ if (out(out_desc, state->window, state->wsize - left))
+ ret = Z_BUF_ERROR;
+ }
+ goto inf_leave;
+
+ case BAD:
+ ret = Z_DATA_ERROR;
+ goto inf_leave;
+
+ default: /* can't happen, but makes compilers happy */
+ ret = Z_STREAM_ERROR;
+ goto inf_leave;
+ }
+
+ /* Return unused input */
+ inf_leave:
+ strm->next_in = next;
+ strm->avail_in = have;
+ return ret;
+}
+
+int ZEXPORT inflateBackEnd(strm)
+z_streamp strm;
+{
+ if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
+ return Z_STREAM_ERROR;
+ ZFREE(strm, strm->state);
+ strm->state = Z_NULL;
+ Tracev((stderr, "inflate: end\n"));
+ return Z_OK;
+}
--- /dev/null
+/* inffast.c -- fast decoding
+ * Copyright (C) 1995-2004 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+#ifndef ASMINF
+
+/* Allow machine dependent optimization for post-increment or pre-increment.
+ Based on testing to date,
+ Pre-increment preferred for:
+ - PowerPC G3 (Adler)
+ - MIPS R5000 (Randers-Pehrson)
+ Post-increment preferred for:
+ - none
+ No measurable difference:
+ - Pentium III (Anderson)
+ - M68060 (Nikl)
+ */
+#ifdef POSTINC
+# define OFF 0
+# define PUP(a) *(a)++
+#else
+# define OFF 1
+# define PUP(a) *++(a)
+#endif
+
+/*
+ Decode literal, length, and distance codes and write out the resulting
+ literal and match bytes until either not enough input or output is
+ available, an end-of-block is encountered, or a data error is encountered.
+ When large enough input and output buffers are supplied to inflate(), for
+ example, a 16K input buffer and a 64K output buffer, more than 95% of the
+ inflate execution time is spent in this routine.
+
+ Entry assumptions:
+
+ state->mode == LEN
+ strm->avail_in >= 6
+ strm->avail_out >= 258
+ start >= strm->avail_out
+ state->bits < 8
+
+ On return, state->mode is one of:
+
+ LEN -- ran out of enough output space or enough available input
+ TYPE -- reached end of block code, inflate() to interpret next block
+ BAD -- error in block data
+
+ Notes:
+
+ - The maximum input bits used by a length/distance pair is 15 bits for the
+ length code, 5 bits for the length extra, 15 bits for the distance code,
+ and 13 bits for the distance extra. This totals 48 bits, or six bytes.
+ Therefore if strm->avail_in >= 6, then there is enough input to avoid
+ checking for available input while decoding.
+
+ - The maximum bytes that a single length/distance pair can output is 258
+ bytes, which is the maximum length that can be coded. inflate_fast()
+ requires strm->avail_out >= 258 for each loop to avoid checking for
+ output space.
+ */
+void inflate_fast(strm, start)
+z_streamp strm;
+unsigned start; /* inflate()'s starting value for strm->avail_out */
+{
+ struct inflate_state FAR *state;
+ unsigned char FAR *in; /* local strm->next_in */
+ unsigned char FAR *last; /* while in < last, enough input available */
+ unsigned char FAR *out; /* local strm->next_out */
+ unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
+ unsigned char FAR *end; /* while out < end, enough space available */
+#ifdef INFLATE_STRICT
+ unsigned dmax; /* maximum distance from zlib header */
+#endif
+ unsigned wsize; /* window size or zero if not using window */
+ unsigned whave; /* valid bytes in the window */
+ unsigned write; /* window write index */
+ unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */
+ unsigned long hold; /* local strm->hold */
+ unsigned bits; /* local strm->bits */
+ code const FAR *lcode; /* local strm->lencode */
+ code const FAR *dcode; /* local strm->distcode */
+ unsigned lmask; /* mask for first level of length codes */
+ unsigned dmask; /* mask for first level of distance codes */
+ code this; /* retrieved table entry */
+ unsigned op; /* code bits, operation, extra bits, or */
+ /* window position, window bytes to copy */
+ unsigned len; /* match length, unused bytes */
+ unsigned dist; /* match distance */
+ unsigned char FAR *from; /* where to copy match from */
+
+ /* copy state to local variables */
+ state = (struct inflate_state FAR *)strm->state;
+ in = strm->next_in - OFF;
+ last = in + (strm->avail_in - 5);
+ out = strm->next_out - OFF;
+ beg = out - (start - strm->avail_out);
+ end = out + (strm->avail_out - 257);
+#ifdef INFLATE_STRICT
+ dmax = state->dmax;
+#endif
+ wsize = state->wsize;
+ whave = state->whave;
+ write = state->write;
+ window = state->window;
+ hold = state->hold;
+ bits = state->bits;
+ lcode = state->lencode;
+ dcode = state->distcode;
+ lmask = (1U << state->lenbits) - 1;
+ dmask = (1U << state->distbits) - 1;
+
+ /* decode literals and length/distances until end-of-block or not enough
+ input data or output space */
+ do {
+ if (bits < 15) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ this = lcode[hold & lmask];
+ dolen:
+ op = (unsigned)(this.bits);
+ hold >>= op;
+ bits -= op;
+ op = (unsigned)(this.op);
+ if (op == 0) { /* literal */
+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ PUP(out) = (unsigned char)(this.val);
+ }
+ else if (op & 16) { /* length base */
+ len = (unsigned)(this.val);
+ op &= 15; /* number of extra bits */
+ if (op) {
+ if (bits < op) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ len += (unsigned)hold & ((1U << op) - 1);
+ hold >>= op;
+ bits -= op;
+ }
+ Tracevv((stderr, "inflate: length %u\n", len));
+ if (bits < 15) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ this = dcode[hold & dmask];
+ dodist:
+ op = (unsigned)(this.bits);
+ hold >>= op;
+ bits -= op;
+ op = (unsigned)(this.op);
+ if (op & 16) { /* distance base */
+ dist = (unsigned)(this.val);
+ op &= 15; /* number of extra bits */
+ if (bits < op) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ if (bits < op) {
+ hold += (unsigned long)(PUP(in)) << bits;
+ bits += 8;
+ }
+ }
+ dist += (unsigned)hold & ((1U << op) - 1);
+#ifdef INFLATE_STRICT
+ if (dist > dmax) {
+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+#endif
+ hold >>= op;
+ bits -= op;
+ Tracevv((stderr, "inflate: distance %u\n", dist));
+ op = (unsigned)(out - beg); /* max distance in output */
+ if (dist > op) { /* see if copy from window */
+ op = dist - op; /* distance back in window */
+ if (op > whave) {
+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ from = window - OFF;
+ if (write == 0) { /* very common case */
+ from += wsize - op;
+ if (op < len) { /* some from window */
+ len -= op;
+ do {
+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ else if (write < op) { /* wrap around window */
+ from += wsize + write - op;
+ op -= write;
+ if (op < len) { /* some from end of window */
+ len -= op;
+ do {
+ PUP(out) = PUP(from);
+ } while (--op);
+ from = window - OFF;
+ if (write < len) { /* some from start of window */
+ op = write;
+ len -= op;
+ do {
+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ }
+ else { /* contiguous in window */
+ from += write - op;
+ if (op < len) { /* some from window */
+ len -= op;
+ do {
+ PUP(out) = PUP(from);
+ } while (--op);
+ from = out - dist; /* rest from output */
+ }
+ }
+ while (len > 2) {
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ len -= 3;
+ }
+ if (len) {
+ PUP(out) = PUP(from);
+ if (len > 1)
+ PUP(out) = PUP(from);
+ }
+ }
+ else {
+ from = out - dist; /* copy direct from output */
+ do { /* minimum length is three */
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ len -= 3;
+ } while (len > 2);
+ if (len) {
+ PUP(out) = PUP(from);
+ if (len > 1)
+ PUP(out) = PUP(from);
+ }
+ }
+ }
+ else if ((op & 64) == 0) { /* 2nd level distance code */
+ this = dcode[this.val + (hold & ((1U << op) - 1))];
+ goto dodist;
+ }
+ else {
+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ }
+ else if ((op & 64) == 0) { /* 2nd level length code */
+ this = lcode[this.val + (hold & ((1U << op) - 1))];
+ goto dolen;
+ }
+ else if (op & 32) { /* end-of-block */
+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
+ break;
+ }
+ else {
+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+ } while (in < last && out < end);
+
+ /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
+ len = bits >> 3;
+ in -= len;
+ bits -= len << 3;
+ hold &= (1U << bits) - 1;
+
+ /* update state and return */
+ strm->next_in = in + OFF;
+ strm->next_out = out + OFF;
+ strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
+ strm->avail_out = (unsigned)(out < end ?
+ 257 + (end - out) : 257 - (out - end));
+ state->hold = hold;
+ state->bits = bits;
+ return;
+}
+
+/*
+ inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe):
+ - Using bit fields for code structure
+ - Different op definition to avoid & for extra bits (do & for table bits)
+ - Three separate decoding do-loops for direct, window, and write == 0
+ - Special case for distance > 1 copies to do overlapped load and store copy
+ - Explicit branch predictions (based on measured branch probabilities)
+ - Deferring match copy and interspersed it with decoding subsequent codes
+ - Swapping literal/length else
+ - Swapping window/direct else
+ - Larger unrolled copy loops (three is about right)
+ - Moving len -= 3 statement into middle of loop
+ */
+
+#endif /* !ASMINF */
--- /dev/null
+/* inffast.h -- header to use inffast.c
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+void inflate_fast OF((z_streamp strm, unsigned start));
--- /dev/null
+ /* inffixed.h -- table for decoding fixed codes
+ * Generated automatically by makefixed().
+ */
+
+ /* WARNING: this file should *not* be used by applications. It
+ is part of the implementation of the compression library and
+ is subject to change. Applications should only use zlib.h.
+ */
+
+ static const code lenfix[512] = {
+ {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},
+ {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},
+ {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},
+ {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},
+ {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},
+ {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},
+ {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},
+ {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},
+ {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},
+ {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},
+ {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},
+ {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},
+ {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},
+ {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},
+ {0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},
+ {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},
+ {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},
+ {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
+ {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},
+ {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},
+ {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},
+ {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},
+ {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},
+ {0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202},
+ {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},
+ {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},
+ {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},
+ {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},
+ {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},
+ {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},
+ {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},
+ {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},
+ {16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55},
+ {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},
+ {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},
+ {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},
+ {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},
+ {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},
+ {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},
+ {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},
+ {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},
+ {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},
+ {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},
+ {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},
+ {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},
+ {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},
+ {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},
+ {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
+ {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},
+ {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},
+ {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51},
+ {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},
+ {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},
+ {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},
+ {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},
+ {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},
+ {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},
+ {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},
+ {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},
+ {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258},
+ {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},
+ {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},
+ {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},
+ {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},
+ {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},
+ {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
+ {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},
+ {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},
+ {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},
+ {64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},
+ {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},
+ {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},
+ {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},
+ {0,9,255}
+ };
+
+ static const code distfix[32] = {
+ {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},
+ {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},
+ {18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385},
+ {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},
+ {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},
+ {22,5,193},{64,5,0}
+ };
--- /dev/null
+/* inflate.c -- zlib decompression
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * Change history:
+ *
+ * 1.2.beta0 24 Nov 2002
+ * - First version -- complete rewrite of inflate to simplify code, avoid
+ * creation of window when not needed, minimize use of window when it is
+ * needed, make inffast.c even faster, implement gzip decoding, and to
+ * improve code readability and style over the previous zlib inflate code
+ *
+ * 1.2.beta1 25 Nov 2002
+ * - Use pointers for available input and output checking in inffast.c
+ * - Remove input and output counters in inffast.c
+ * - Change inffast.c entry and loop from avail_in >= 7 to >= 6
+ * - Remove unnecessary second byte pull from length extra in inffast.c
+ * - Unroll direct copy to three copies per loop in inffast.c
+ *
+ * 1.2.beta2 4 Dec 2002
+ * - Change external routine names to reduce potential conflicts
+ * - Correct filename to inffixed.h for fixed tables in inflate.c
+ * - Make hbuf[] unsigned char to match parameter type in inflate.c
+ * - Change strm->next_out[-state->offset] to *(strm->next_out - state->offset)
+ * to avoid negation problem on Alphas (64 bit) in inflate.c
+ *
+ * 1.2.beta3 22 Dec 2002
+ * - Add comments on state->bits assertion in inffast.c
+ * - Add comments on op field in inftrees.h
+ * - Fix bug in reuse of allocated window after inflateReset()
+ * - Remove bit fields--back to byte structure for speed
+ * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
+ * - Change post-increments to pre-increments in inflate_fast(), PPC biased?
+ * - Add compile time option, POSTINC, to use post-increments instead (Intel?)
+ * - Make MATCH copy in inflate() much faster for when inflate_fast() not used
+ * - Use local copies of stream next and avail values, as well as local bit
+ * buffer and bit count in inflate()--for speed when inflate_fast() not used
+ *
+ * 1.2.beta4 1 Jan 2003
+ * - Split ptr - 257 statements in inflate_table() to avoid compiler warnings
+ * - Move a comment on output buffer sizes from inffast.c to inflate.c
+ * - Add comments in inffast.c to introduce the inflate_fast() routine
+ * - Rearrange window copies in inflate_fast() for speed and simplification
+ * - Unroll last copy for window match in inflate_fast()
+ * - Use local copies of window variables in inflate_fast() for speed
+ * - Pull out common write == 0 case for speed in inflate_fast()
+ * - Make op and len in inflate_fast() unsigned for consistency
+ * - Add FAR to lcode and dcode declarations in inflate_fast()
+ * - Simplified bad distance check in inflate_fast()
+ * - Added inflateBackInit(), inflateBack(), and inflateBackEnd() in new
+ * source file infback.c to provide a call-back interface to inflate for
+ * programs like gzip and unzip -- uses window as output buffer to avoid
+ * window copying
+ *
+ * 1.2.beta5 1 Jan 2003
+ * - Improved inflateBack() interface to allow the caller to provide initial
+ * input in strm.
+ * - Fixed stored blocks bug in inflateBack()
+ *
+ * 1.2.beta6 4 Jan 2003
+ * - Added comments in inffast.c on effectiveness of POSTINC
+ * - Typecasting all around to reduce compiler warnings
+ * - Changed loops from while (1) or do {} while (1) to for (;;), again to
+ * make compilers happy
+ * - Changed type of window in inflateBackInit() to unsigned char *
+ *
+ * 1.2.beta7 27 Jan 2003
+ * - Changed many types to unsigned or unsigned short to avoid warnings
+ * - Added inflateCopy() function
+ *
+ * 1.2.0 9 Mar 2003
+ * - Changed inflateBack() interface to provide separate opaque descriptors
+ * for the in() and out() functions
+ * - Changed inflateBack() argument and in_func typedef to swap the length
+ * and buffer address return values for the input function
+ * - Check next_in and next_out for Z_NULL on entry to inflate()
+ *
+ * The history for versions after 1.2.0 are in ChangeLog in zlib distribution.
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+#ifdef MAKEFIXED
+# ifndef BUILDFIXED
+# define BUILDFIXED
+# endif
+#endif
+
+/* function prototypes */
+local void fixedtables OF((struct inflate_state FAR *state));
+local int updatewindow OF((z_streamp strm, unsigned out));
+#ifdef BUILDFIXED
+ void makefixed OF((void));
+#endif
+local unsigned syncsearch OF((unsigned FAR *have, unsigned char FAR *buf,
+ unsigned len));
+
+int ZEXPORT inflateReset(strm)
+z_streamp strm;
+{
+ struct inflate_state FAR *state;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ strm->total_in = strm->total_out = state->total = 0;
+ strm->msg = Z_NULL;
+ strm->adler = 1; /* to support ill-conceived Java test suite */
+ state->mode = HEAD;
+ state->last = 0;
+ state->havedict = 0;
+ state->dmax = 32768U;
+ state->head = Z_NULL;
+ state->wsize = 0;
+ state->whave = 0;
+ state->write = 0;
+ state->hold = 0;
+ state->bits = 0;
+ state->lencode = state->distcode = state->next = state->codes;
+ Tracev((stderr, "inflate: reset\n"));
+ return Z_OK;
+}
+
+int ZEXPORT inflatePrime(strm, bits, value)
+z_streamp strm;
+int bits;
+int value;
+{
+ struct inflate_state FAR *state;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
+ value &= (1L << bits) - 1;
+ state->hold += value << state->bits;
+ state->bits += bits;
+ return Z_OK;
+}
+
+int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size)
+z_streamp strm;
+int windowBits;
+const char *version;
+int stream_size;
+{
+ struct inflate_state FAR *state;
+
+ if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+ stream_size != (int)(sizeof(z_stream)))
+ return Z_VERSION_ERROR;
+ if (strm == Z_NULL) return Z_STREAM_ERROR;
+ strm->msg = Z_NULL; /* in case we return an error */
+ if (strm->zalloc == (alloc_func)0) {
+ strm->zalloc = zcalloc;
+ strm->opaque = (voidpf)0;
+ }
+ if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+ state = (struct inflate_state FAR *)
+ ZALLOC(strm, 1, sizeof(struct inflate_state));
+ if (state == Z_NULL) return Z_MEM_ERROR;
+ Tracev((stderr, "inflate: allocated\n"));
+ strm->state = (struct internal_state FAR *)state;
+ if (windowBits < 0) {
+ state->wrap = 0;
+ windowBits = -windowBits;
+ }
+ else {
+ state->wrap = (windowBits >> 4) + 1;
+#ifdef GUNZIP
+ if (windowBits < 48) windowBits &= 15;
+#endif
+ }
+ if (windowBits < 8 || windowBits > 15) {
+ ZFREE(strm, state);
+ strm->state = Z_NULL;
+ return Z_STREAM_ERROR;
+ }
+ state->wbits = (unsigned)windowBits;
+ state->window = Z_NULL;
+ return inflateReset(strm);
+}
+
+int ZEXPORT inflateInit_(strm, version, stream_size)
+z_streamp strm;
+const char *version;
+int stream_size;
+{
+ return inflateInit2_(strm, DEF_WBITS, version, stream_size);
+}
+
+/*
+ Return state with length and distance decoding tables and index sizes set to
+ fixed code decoding. Normally this returns fixed tables from inffixed.h.
+ If BUILDFIXED is defined, then instead this routine builds the tables the
+ first time it's called, and returns those tables the first time and
+ thereafter. This reduces the size of the code by about 2K bytes, in
+ exchange for a little execution time. However, BUILDFIXED should not be
+ used for threaded applications, since the rewriting of the tables and virgin
+ may not be thread-safe.
+ */
+local void fixedtables(state)
+struct inflate_state FAR *state;
+{
+#ifdef BUILDFIXED
+ static int virgin = 1;
+ static code *lenfix, *distfix;
+ static code fixed[544];
+
+ /* build fixed huffman tables if first call (may not be thread safe) */
+ if (virgin) {
+ unsigned sym, bits;
+ static code *next;
+
+ /* literal/length table */
+ sym = 0;
+ while (sym < 144) state->lens[sym++] = 8;
+ while (sym < 256) state->lens[sym++] = 9;
+ while (sym < 280) state->lens[sym++] = 7;
+ while (sym < 288) state->lens[sym++] = 8;
+ next = fixed;
+ lenfix = next;
+ bits = 9;
+ inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
+
+ /* distance table */
+ sym = 0;
+ while (sym < 32) state->lens[sym++] = 5;
+ distfix = next;
+ bits = 5;
+ inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
+
+ /* do this just once */
+ virgin = 0;
+ }
+#else /* !BUILDFIXED */
+# include "inffixed.h"
+#endif /* BUILDFIXED */
+ state->lencode = lenfix;
+ state->lenbits = 9;
+ state->distcode = distfix;
+ state->distbits = 5;
+}
+
+#ifdef MAKEFIXED
+#include <stdio.h>
+
+/*
+ Write out the inffixed.h that is #include'd above. Defining MAKEFIXED also
+ defines BUILDFIXED, so the tables are built on the fly. makefixed() writes
+ those tables to stdout, which would be piped to inffixed.h. A small program
+ can simply call makefixed to do this:
+
+ void makefixed(void);
+
+ int main(void)
+ {
+ makefixed();
+ return 0;
+ }
+
+ Then that can be linked with zlib built with MAKEFIXED defined and run:
+
+ a.out > inffixed.h
+ */
+void makefixed()
+{
+ unsigned low, size;
+ struct inflate_state state;
+
+ fixedtables(&state);
+ puts(" /* inffixed.h -- table for decoding fixed codes");
+ puts(" * Generated automatically by makefixed().");
+ puts(" */");
+ puts("");
+ puts(" /* WARNING: this file should *not* be used by applications.");
+ puts(" It is part of the implementation of this library and is");
+ puts(" subject to change. Applications should only use zlib.h.");
+ puts(" */");
+ puts("");
+ size = 1U << 9;
+ printf(" static const code lenfix[%u] = {", size);
+ low = 0;
+ for (;;) {
+ if ((low % 7) == 0) printf("\n ");
+ printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits,
+ state.lencode[low].val);
+ if (++low == size) break;
+ putchar(',');
+ }
+ puts("\n };");
+ size = 1U << 5;
+ printf("\n static const code distfix[%u] = {", size);
+ low = 0;
+ for (;;) {
+ if ((low % 6) == 0) printf("\n ");
+ printf("{%u,%u,%d}", state.distcode[low].op, state.distcode[low].bits,
+ state.distcode[low].val);
+ if (++low == size) break;
+ putchar(',');
+ }
+ puts("\n };");
+}
+#endif /* MAKEFIXED */
+
+/*
+ Update the window with the last wsize (normally 32K) bytes written before
+ returning. If window does not exist yet, create it. This is only called
+ when a window is already in use, or when output has been written during this
+ inflate call, but the end of the deflate stream has not been reached yet.
+ It is also called to create a window for dictionary data when a dictionary
+ is loaded.
+
+ Providing output buffers larger than 32K to inflate() should provide a speed
+ advantage, since only the last 32K of output is copied to the sliding window
+ upon return from inflate(), and since all distances after the first 32K of
+ output will fall in the output data, making match copies simpler and faster.
+ The advantage may be dependent on the size of the processor's data caches.
+ */
+local int updatewindow(strm, out)
+z_streamp strm;
+unsigned out;
+{
+ struct inflate_state FAR *state;
+ unsigned copy, dist;
+
+ state = (struct inflate_state FAR *)strm->state;
+
+ /* if it hasn't been done already, allocate space for the window */
+ if (state->window == Z_NULL) {
+ state->window = (unsigned char FAR *)
+ ZALLOC(strm, 1U << state->wbits,
+ sizeof(unsigned char));
+ if (state->window == Z_NULL) return 1;
+ }
+
+ /* if window not in use yet, initialize */
+ if (state->wsize == 0) {
+ state->wsize = 1U << state->wbits;
+ state->write = 0;
+ state->whave = 0;
+ }
+
+ /* copy state->wsize or less output bytes into the circular window */
+ copy = out - strm->avail_out;
+ if (copy >= state->wsize) {
+ zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
+ state->write = 0;
+ state->whave = state->wsize;
+ }
+ else {
+ dist = state->wsize - state->write;
+ if (dist > copy) dist = copy;
+ zmemcpy(state->window + state->write, strm->next_out - copy, dist);
+ copy -= dist;
+ if (copy) {
+ zmemcpy(state->window, strm->next_out - copy, copy);
+ state->write = copy;
+ state->whave = state->wsize;
+ }
+ else {
+ state->write += dist;
+ if (state->write == state->wsize) state->write = 0;
+ if (state->whave < state->wsize) state->whave += dist;
+ }
+ }
+ return 0;
+}
+
+/* Macros for inflate(): */
+
+/* check function to use adler32() for zlib or crc32() for gzip */
+#ifdef GUNZIP
+# define UPDATE(check, buf, len) \
+ (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
+#else
+# define UPDATE(check, buf, len) adler32(check, buf, len)
+#endif
+
+/* check macros for header crc */
+#ifdef GUNZIP
+# define CRC2(check, word) \
+ do { \
+ hbuf[0] = (unsigned char)(word); \
+ hbuf[1] = (unsigned char)((word) >> 8); \
+ check = crc32(check, hbuf, 2); \
+ } while (0)
+
+# define CRC4(check, word) \
+ do { \
+ hbuf[0] = (unsigned char)(word); \
+ hbuf[1] = (unsigned char)((word) >> 8); \
+ hbuf[2] = (unsigned char)((word) >> 16); \
+ hbuf[3] = (unsigned char)((word) >> 24); \
+ check = crc32(check, hbuf, 4); \
+ } while (0)
+#endif
+
+/* Load registers with state in inflate() for speed */
+#define LOAD() \
+ do { \
+ put = strm->next_out; \
+ left = strm->avail_out; \
+ next = strm->next_in; \
+ have = strm->avail_in; \
+ hold = state->hold; \
+ bits = state->bits; \
+ } while (0)
+
+/* Restore state from registers in inflate() */
+#define RESTORE() \
+ do { \
+ strm->next_out = put; \
+ strm->avail_out = left; \
+ strm->next_in = next; \
+ strm->avail_in = have; \
+ state->hold = hold; \
+ state->bits = bits; \
+ } while (0)
+
+/* Clear the input bit accumulator */
+#define INITBITS() \
+ do { \
+ hold = 0; \
+ bits = 0; \
+ } while (0)
+
+/* Get a byte of input into the bit accumulator, or return from inflate()
+ if there is no input available. */
+#define PULLBYTE() \
+ do { \
+ if (have == 0) goto inf_leave; \
+ have--; \
+ hold += (unsigned long)(*next++) << bits; \
+ bits += 8; \
+ } while (0)
+
+/* Assure that there are at least n bits in the bit accumulator. If there is
+ not enough available input to do that, then return from inflate(). */
+#define NEEDBITS(n) \
+ do { \
+ while (bits < (unsigned)(n)) \
+ PULLBYTE(); \
+ } while (0)
+
+/* Return the low n bits of the bit accumulator (n < 16) */
+#define BITS(n) \
+ ((unsigned)hold & ((1U << (n)) - 1))
+
+/* Remove n bits from the bit accumulator */
+#define DROPBITS(n) \
+ do { \
+ hold >>= (n); \
+ bits -= (unsigned)(n); \
+ } while (0)
+
+/* Remove zero to seven bits as needed to go to a byte boundary */
+#define BYTEBITS() \
+ do { \
+ hold >>= bits & 7; \
+ bits -= bits & 7; \
+ } while (0)
+
+/* Reverse the bytes in a 32-bit value */
+#define REVERSE(q) \
+ ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
+ (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
+
+/*
+ inflate() uses a state machine to process as much input data and generate as
+ much output data as possible before returning. The state machine is
+ structured roughly as follows:
+
+ for (;;) switch (state) {
+ ...
+ case STATEn:
+ if (not enough input data or output space to make progress)
+ return;
+ ... make progress ...
+ state = STATEm;
+ break;
+ ...
+ }
+
+ so when inflate() is called again, the same case is attempted again, and
+ if the appropriate resources are provided, the machine proceeds to the
+ next state. The NEEDBITS() macro is usually the way the state evaluates
+ whether it can proceed or should return. NEEDBITS() does the return if
+ the requested bits are not available. The typical use of the BITS macros
+ is:
+
+ NEEDBITS(n);
+ ... do something with BITS(n) ...
+ DROPBITS(n);
+
+ where NEEDBITS(n) either returns from inflate() if there isn't enough
+ input left to load n bits into the accumulator, or it continues. BITS(n)
+ gives the low n bits in the accumulator. When done, DROPBITS(n) drops
+ the low n bits off the accumulator. INITBITS() clears the accumulator
+ and sets the number of available bits to zero. BYTEBITS() discards just
+ enough bits to put the accumulator on a byte boundary. After BYTEBITS()
+ and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
+
+ NEEDBITS(n) uses PULLBYTE() to get an available byte of input, or to return
+ if there is no input available. The decoding of variable length codes uses
+ PULLBYTE() directly in order to pull just enough bytes to decode the next
+ code, and no more.
+
+ Some states loop until they get enough input, making sure that enough
+ state information is maintained to continue the loop where it left off
+ if NEEDBITS() returns in the loop. For example, want, need, and keep
+ would all have to actually be part of the saved state in case NEEDBITS()
+ returns:
+
+ case STATEw:
+ while (want < need) {
+ NEEDBITS(n);
+ keep[want++] = BITS(n);
+ DROPBITS(n);
+ }
+ state = STATEx;
+ case STATEx:
+
+ As shown above, if the next state is also the next case, then the break
+ is omitted.
+
+ A state may also return if there is not enough output space available to
+ complete that state. Those states are copying stored data, writing a
+ literal byte, and copying a matching string.
+
+ When returning, a "goto inf_leave" is used to update the total counters,
+ update the check value, and determine whether any progress has been made
+ during that inflate() call in order to return the proper return code.
+ Progress is defined as a change in either strm->avail_in or strm->avail_out.
+ When there is a window, goto inf_leave will update the window with the last
+ output written. If a goto inf_leave occurs in the middle of decompression
+ and there is no window currently, goto inf_leave will create one and copy
+ output to the window for the next call of inflate().
+
+ In this implementation, the flush parameter of inflate() only affects the
+ return code (per zlib.h). inflate() always writes as much as possible to
+ strm->next_out, given the space available and the provided input--the effect
+ documented in zlib.h of Z_SYNC_FLUSH. Furthermore, inflate() always defers
+ the allocation of and copying into a sliding window until necessary, which
+ provides the effect documented in zlib.h for Z_FINISH when the entire input
+ stream available. So the only thing the flush parameter actually does is:
+ when flush is set to Z_FINISH, inflate() cannot return Z_OK. Instead it
+ will return Z_BUF_ERROR if it has not reached the end of the stream.
+ */
+
+int ZEXPORT inflate(strm, flush)
+z_streamp strm;
+int flush;
+{
+ struct inflate_state FAR *state;
+ unsigned char FAR *next; /* next input */
+ unsigned char FAR *put; /* next output */
+ unsigned have, left; /* available input and output */
+ unsigned long hold; /* bit buffer */
+ unsigned bits; /* bits in bit buffer */
+ unsigned in, out; /* save starting available input and output */
+ unsigned copy; /* number of stored or match bytes to copy */
+ unsigned char FAR *from; /* where to copy match bytes from */
+ code this; /* current decoding table entry */
+ code last; /* parent table entry */
+ unsigned len; /* length to copy for repeats, bits to drop */
+ int ret; /* return code */
+#ifdef GUNZIP
+ unsigned char hbuf[4]; /* buffer for gzip header crc calculation */
+#endif
+ static const unsigned short order[19] = /* permutation of code lengths */
+ {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+
+ if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
+ (strm->next_in == Z_NULL && strm->avail_in != 0))
+ return Z_STREAM_ERROR;
+
+ state = (struct inflate_state FAR *)strm->state;
+ if (state->mode == TYPE) state->mode = TYPEDO; /* skip check */
+ LOAD();
+ in = have;
+ out = left;
+ ret = Z_OK;
+ for (;;)
+ switch (state->mode) {
+ case HEAD:
+ if (state->wrap == 0) {
+ state->mode = TYPEDO;
+ break;
+ }
+ NEEDBITS(16);
+#ifdef GUNZIP
+ if ((state->wrap & 2) && hold == 0x8b1f) { /* gzip header */
+ state->check = crc32(0L, Z_NULL, 0);
+ CRC2(state->check, hold);
+ INITBITS();
+ state->mode = FLAGS;
+ break;
+ }
+ state->flags = 0; /* expect zlib header */
+ if (state->head != Z_NULL)
+ state->head->done = -1;
+ if (!(state->wrap & 1) || /* check if zlib header allowed */
+#else
+ if (
+#endif
+ ((BITS(8) << 8) + (hold >> 8)) % 31) {
+ strm->msg = (char *)"incorrect header check";
+ state->mode = BAD;
+ break;
+ }
+ if (BITS(4) != Z_DEFLATED) {
+ strm->msg = (char *)"unknown compression method";
+ state->mode = BAD;
+ break;
+ }
+ DROPBITS(4);
+ len = BITS(4) + 8;
+ if (len > state->wbits) {
+ strm->msg = (char *)"invalid window size";
+ state->mode = BAD;
+ break;
+ }
+ state->dmax = 1U << len;
+ Tracev((stderr, "inflate: zlib header ok\n"));
+ strm->adler = state->check = adler32(0L, Z_NULL, 0);
+ state->mode = hold & 0x200 ? DICTID : TYPE;
+ INITBITS();
+ break;
+#ifdef GUNZIP
+ case FLAGS:
+ NEEDBITS(16);
+ state->flags = (int)(hold);
+ if ((state->flags & 0xff) != Z_DEFLATED) {
+ strm->msg = (char *)"unknown compression method";
+ state->mode = BAD;
+ break;
+ }
+ if (state->flags & 0xe000) {
+ strm->msg = (char *)"unknown header flags set";
+ state->mode = BAD;
+ break;
+ }
+ if (state->head != Z_NULL)
+ state->head->text = (int)((hold >> 8) & 1);
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ state->mode = TIME;
+ case TIME:
+ NEEDBITS(32);
+ if (state->head != Z_NULL)
+ state->head->time = hold;
+ if (state->flags & 0x0200) CRC4(state->check, hold);
+ INITBITS();
+ state->mode = OS;
+ case OS:
+ NEEDBITS(16);
+ if (state->head != Z_NULL) {
+ state->head->xflags = (int)(hold & 0xff);
+ state->head->os = (int)(hold >> 8);
+ }
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ state->mode = EXLEN;
+ case EXLEN:
+ if (state->flags & 0x0400) {
+ NEEDBITS(16);
+ state->length = (unsigned)(hold);
+ if (state->head != Z_NULL)
+ state->head->extra_len = (unsigned)hold;
+ if (state->flags & 0x0200) CRC2(state->check, hold);
+ INITBITS();
+ }
+ else if (state->head != Z_NULL)
+ state->head->extra = Z_NULL;
+ state->mode = EXTRA;
+ case EXTRA:
+ if (state->flags & 0x0400) {
+ copy = state->length;
+ if (copy > have) copy = have;
+ if (copy) {
+ if (state->head != Z_NULL &&
+ state->head->extra != Z_NULL) {
+ len = state->head->extra_len - state->length;
+ zmemcpy(state->head->extra + len, next,
+ len + copy > state->head->extra_max ?
+ state->head->extra_max - len : copy);
+ }
+ if (state->flags & 0x0200)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ state->length -= copy;
+ }
+ if (state->length) goto inf_leave;
+ }
+ state->length = 0;
+ state->mode = NAME;
+ case NAME:
+ if (state->flags & 0x0800) {
+ if (have == 0) goto inf_leave;
+ copy = 0;
+ do {
+ len = (unsigned)(next[copy++]);
+ if (state->head != Z_NULL &&
+ state->head->name != Z_NULL &&
+ state->length < state->head->name_max)
+ state->head->name[state->length++] = len;
+ } while (len && copy < have);
+ if (state->flags & 0x0200)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ if (len) goto inf_leave;
+ }
+ else if (state->head != Z_NULL)
+ state->head->name = Z_NULL;
+ state->length = 0;
+ state->mode = COMMENT;
+ case COMMENT:
+ if (state->flags & 0x1000) {
+ if (have == 0) goto inf_leave;
+ copy = 0;
+ do {
+ len = (unsigned)(next[copy++]);
+ if (state->head != Z_NULL &&
+ state->head->comment != Z_NULL &&
+ state->length < state->head->comm_max)
+ state->head->comment[state->length++] = len;
+ } while (len && copy < have);
+ if (state->flags & 0x0200)
+ state->check = crc32(state->check, next, copy);
+ have -= copy;
+ next += copy;
+ if (len) goto inf_leave;
+ }
+ else if (state->head != Z_NULL)
+ state->head->comment = Z_NULL;
+ state->mode = HCRC;
+ case HCRC:
+ if (state->flags & 0x0200) {
+ NEEDBITS(16);
+ if (hold != (state->check & 0xffff)) {
+ strm->msg = (char *)"header crc mismatch";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ }
+ if (state->head != Z_NULL) {
+ state->head->hcrc = (int)((state->flags >> 9) & 1);
+ state->head->done = 1;
+ }
+ strm->adler = state->check = crc32(0L, Z_NULL, 0);
+ state->mode = TYPE;
+ break;
+#endif
+ case DICTID:
+ NEEDBITS(32);
+ strm->adler = state->check = REVERSE(hold);
+ INITBITS();
+ state->mode = DICT;
+ case DICT:
+ if (state->havedict == 0) {
+ RESTORE();
+ return Z_NEED_DICT;
+ }
+ strm->adler = state->check = adler32(0L, Z_NULL, 0);
+ state->mode = TYPE;
+ case TYPE:
+ if (flush == Z_BLOCK) goto inf_leave;
+ case TYPEDO:
+ if (state->last) {
+ BYTEBITS();
+ state->mode = CHECK;
+ break;
+ }
+ NEEDBITS(3);
+ state->last = BITS(1);
+ DROPBITS(1);
+ switch (BITS(2)) {
+ case 0: /* stored block */
+ Tracev((stderr, "inflate: stored block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = STORED;
+ break;
+ case 1: /* fixed block */
+ fixedtables(state);
+ Tracev((stderr, "inflate: fixed codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = LEN; /* decode codes */
+ break;
+ case 2: /* dynamic block */
+ Tracev((stderr, "inflate: dynamic codes block%s\n",
+ state->last ? " (last)" : ""));
+ state->mode = TABLE;
+ break;
+ case 3:
+ strm->msg = (char *)"invalid block type";
+ state->mode = BAD;
+ }
+ DROPBITS(2);
+ break;
+ case STORED:
+ BYTEBITS(); /* go to byte boundary */
+ NEEDBITS(32);
+ if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
+ strm->msg = (char *)"invalid stored block lengths";
+ state->mode = BAD;
+ break;
+ }
+ state->length = (unsigned)hold & 0xffff;
+ Tracev((stderr, "inflate: stored length %u\n",
+ state->length));
+ INITBITS();
+ state->mode = COPY;
+ case COPY:
+ copy = state->length;
+ if (copy) {
+ if (copy > have) copy = have;
+ if (copy > left) copy = left;
+ if (copy == 0) goto inf_leave;
+ zmemcpy(put, next, copy);
+ have -= copy;
+ next += copy;
+ left -= copy;
+ put += copy;
+ state->length -= copy;
+ break;
+ }
+ Tracev((stderr, "inflate: stored end\n"));
+ state->mode = TYPE;
+ break;
+ case TABLE:
+ NEEDBITS(14);
+ state->nlen = BITS(5) + 257;
+ DROPBITS(5);
+ state->ndist = BITS(5) + 1;
+ DROPBITS(5);
+ state->ncode = BITS(4) + 4;
+ DROPBITS(4);
+#ifndef PKZIP_BUG_WORKAROUND
+ if (state->nlen > 286 || state->ndist > 30) {
+ strm->msg = (char *)"too many length or distance symbols";
+ state->mode = BAD;
+ break;
+ }
+#endif
+ Tracev((stderr, "inflate: table sizes ok\n"));
+ state->have = 0;
+ state->mode = LENLENS;
+ case LENLENS:
+ while (state->have < state->ncode) {
+ NEEDBITS(3);
+ state->lens[order[state->have++]] = (unsigned short)BITS(3);
+ DROPBITS(3);
+ }
+ while (state->have < 19)
+ state->lens[order[state->have++]] = 0;
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 7;
+ ret = inflate_table(CODES, state->lens, 19, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid code lengths set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: code lengths ok\n"));
+ state->have = 0;
+ state->mode = CODELENS;
+ case CODELENS:
+ while (state->have < state->nlen + state->ndist) {
+ for (;;) {
+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.val < 16) {
+ NEEDBITS(this.bits);
+ DROPBITS(this.bits);
+ state->lens[state->have++] = this.val;
+ }
+ else {
+ if (this.val == 16) {
+ NEEDBITS(this.bits + 2);
+ DROPBITS(this.bits);
+ if (state->have == 0) {
+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ len = state->lens[state->have - 1];
+ copy = 3 + BITS(2);
+ DROPBITS(2);
+ }
+ else if (this.val == 17) {
+ NEEDBITS(this.bits + 3);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 3 + BITS(3);
+ DROPBITS(3);
+ }
+ else {
+ NEEDBITS(this.bits + 7);
+ DROPBITS(this.bits);
+ len = 0;
+ copy = 11 + BITS(7);
+ DROPBITS(7);
+ }
+ if (state->have + copy > state->nlen + state->ndist) {
+ strm->msg = (char *)"invalid bit length repeat";
+ state->mode = BAD;
+ break;
+ }
+ while (copy--)
+ state->lens[state->have++] = (unsigned short)len;
+ }
+ }
+
+ /* handle error breaks in while */
+ if (state->mode == BAD) break;
+
+ /* build code tables */
+ state->next = state->codes;
+ state->lencode = (code const FAR *)(state->next);
+ state->lenbits = 9;
+ ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
+ &(state->lenbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid literal/lengths set";
+ state->mode = BAD;
+ break;
+ }
+ state->distcode = (code const FAR *)(state->next);
+ state->distbits = 6;
+ ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
+ &(state->next), &(state->distbits), state->work);
+ if (ret) {
+ strm->msg = (char *)"invalid distances set";
+ state->mode = BAD;
+ break;
+ }
+ Tracev((stderr, "inflate: codes ok\n"));
+ state->mode = LEN;
+ case LEN:
+ if (have >= 6 && left >= 258) {
+ RESTORE();
+ inflate_fast(strm, out);
+ LOAD();
+ break;
+ }
+ for (;;) {
+ this = state->lencode[BITS(state->lenbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if (this.op && (this.op & 0xf0) == 0) {
+ last = this;
+ for (;;) {
+ this = state->lencode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ state->length = (unsigned)this.val;
+ if ((int)(this.op) == 0) {
+ Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+ "inflate: literal '%c'\n" :
+ "inflate: literal 0x%02x\n", this.val));
+ state->mode = LIT;
+ break;
+ }
+ if (this.op & 32) {
+ Tracevv((stderr, "inflate: end of block\n"));
+ state->mode = TYPE;
+ break;
+ }
+ if (this.op & 64) {
+ strm->msg = (char *)"invalid literal/length code";
+ state->mode = BAD;
+ break;
+ }
+ state->extra = (unsigned)(this.op) & 15;
+ state->mode = LENEXT;
+ case LENEXT:
+ if (state->extra) {
+ NEEDBITS(state->extra);
+ state->length += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+ Tracevv((stderr, "inflate: length %u\n", state->length));
+ state->mode = DIST;
+ case DIST:
+ for (;;) {
+ this = state->distcode[BITS(state->distbits)];
+ if ((unsigned)(this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ if ((this.op & 0xf0) == 0) {
+ last = this;
+ for (;;) {
+ this = state->distcode[last.val +
+ (BITS(last.bits + last.op) >> last.bits)];
+ if ((unsigned)(last.bits + this.bits) <= bits) break;
+ PULLBYTE();
+ }
+ DROPBITS(last.bits);
+ }
+ DROPBITS(this.bits);
+ if (this.op & 64) {
+ strm->msg = (char *)"invalid distance code";
+ state->mode = BAD;
+ break;
+ }
+ state->offset = (unsigned)this.val;
+ state->extra = (unsigned)(this.op) & 15;
+ state->mode = DISTEXT;
+ case DISTEXT:
+ if (state->extra) {
+ NEEDBITS(state->extra);
+ state->offset += BITS(state->extra);
+ DROPBITS(state->extra);
+ }
+#ifdef INFLATE_STRICT
+ if (state->offset > state->dmax) {
+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+#endif
+ if (state->offset > state->whave + out - left) {
+ strm->msg = (char *)"invalid distance too far back";
+ state->mode = BAD;
+ break;
+ }
+ Tracevv((stderr, "inflate: distance %u\n", state->offset));
+ state->mode = MATCH;
+ case MATCH:
+ if (left == 0) goto inf_leave;
+ copy = out - left;
+ if (state->offset > copy) { /* copy from window */
+ copy = state->offset - copy;
+ if (copy > state->write) {
+ copy -= state->write;
+ from = state->window + (state->wsize - copy);
+ }
+ else
+ from = state->window + (state->write - copy);
+ if (copy > state->length) copy = state->length;
+ }
+ else { /* copy from output */
+ from = put - state->offset;
+ copy = state->length;
+ }
+ if (copy > left) copy = left;
+ left -= copy;
+ state->length -= copy;
+ do {
+ *put++ = *from++;
+ } while (--copy);
+ if (state->length == 0) state->mode = LEN;
+ break;
+ case LIT:
+ if (left == 0) goto inf_leave;
+ *put++ = (unsigned char)(state->length);
+ left--;
+ state->mode = LEN;
+ break;
+ case CHECK:
+ if (state->wrap) {
+ NEEDBITS(32);
+ out -= left;
+ strm->total_out += out;
+ state->total += out;
+ if (out)
+ strm->adler = state->check =
+ UPDATE(state->check, put - out, out);
+ out = left;
+ if ((
+#ifdef GUNZIP
+ state->flags ? hold :
+#endif
+ REVERSE(hold)) != state->check) {
+ strm->msg = (char *)"incorrect data check";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ Tracev((stderr, "inflate: check matches trailer\n"));
+ }
+#ifdef GUNZIP
+ state->mode = LENGTH;
+ case LENGTH:
+ if (state->wrap && state->flags) {
+ NEEDBITS(32);
+ if (hold != (state->total & 0xffffffffUL)) {
+ strm->msg = (char *)"incorrect length check";
+ state->mode = BAD;
+ break;
+ }
+ INITBITS();
+ Tracev((stderr, "inflate: length matches trailer\n"));
+ }
+#endif
+ state->mode = DONE;
+ case DONE:
+ ret = Z_STREAM_END;
+ goto inf_leave;
+ case BAD:
+ ret = Z_DATA_ERROR;
+ goto inf_leave;
+ case MEM:
+ return Z_MEM_ERROR;
+ case SYNC:
+ default:
+ return Z_STREAM_ERROR;
+ }
+
+ /*
+ Return from inflate(), updating the total counts and the check value.
+ If there was no progress during the inflate() call, return a buffer
+ error. Call updatewindow() to create and/or update the window state.
+ Note: a memory error from inflate() is non-recoverable.
+ */
+ inf_leave:
+ RESTORE();
+ if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
+ if (updatewindow(strm, out)) {
+ state->mode = MEM;
+ return Z_MEM_ERROR;
+ }
+ in -= strm->avail_in;
+ out -= strm->avail_out;
+ strm->total_in += in;
+ strm->total_out += out;
+ state->total += out;
+ if (state->wrap && out)
+ strm->adler = state->check =
+ UPDATE(state->check, strm->next_out - out, out);
+ strm->data_type = state->bits + (state->last ? 64 : 0) +
+ (state->mode == TYPE ? 128 : 0);
+ if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
+ ret = Z_BUF_ERROR;
+ return ret;
+}
+
+int ZEXPORT inflateEnd(strm)
+z_streamp strm;
+{
+ struct inflate_state FAR *state;
+ if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (state->window != Z_NULL) ZFREE(strm, state->window);
+ ZFREE(strm, strm->state);
+ strm->state = Z_NULL;
+ Tracev((stderr, "inflate: end\n"));
+ return Z_OK;
+}
+
+int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength)
+z_streamp strm;
+const Bytef *dictionary;
+uInt dictLength;
+{
+ struct inflate_state FAR *state;
+ unsigned long id;
+
+ /* check state */
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (state->wrap != 0 && state->mode != DICT)
+ return Z_STREAM_ERROR;
+
+ /* check for correct dictionary id */
+ if (state->mode == DICT) {
+ id = adler32(0L, Z_NULL, 0);
+ id = adler32(id, dictionary, dictLength);
+ if (id != state->check)
+ return Z_DATA_ERROR;
+ }
+
+ /* copy dictionary to window */
+ if (updatewindow(strm, strm->avail_out)) {
+ state->mode = MEM;
+ return Z_MEM_ERROR;
+ }
+ if (dictLength > state->wsize) {
+ zmemcpy(state->window, dictionary + dictLength - state->wsize,
+ state->wsize);
+ state->whave = state->wsize;
+ }
+ else {
+ zmemcpy(state->window + state->wsize - dictLength, dictionary,
+ dictLength);
+ state->whave = dictLength;
+ }
+ state->havedict = 1;
+ Tracev((stderr, "inflate: dictionary set\n"));
+ return Z_OK;
+}
+
+int ZEXPORT inflateGetHeader(strm, head)
+z_streamp strm;
+gz_headerp head;
+{
+ struct inflate_state FAR *state;
+
+ /* check state */
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
+
+ /* save header structure */
+ state->head = head;
+ head->done = 0;
+ return Z_OK;
+}
+
+/*
+ Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff. Return when found
+ or when out of input. When called, *have is the number of pattern bytes
+ found in order so far, in 0..3. On return *have is updated to the new
+ state. If on return *have equals four, then the pattern was found and the
+ return value is how many bytes were read including the last byte of the
+ pattern. If *have is less than four, then the pattern has not been found
+ yet and the return value is len. In the latter case, syncsearch() can be
+ called again with more data and the *have state. *have is initialized to
+ zero for the first call.
+ */
+local unsigned syncsearch(have, buf, len)
+unsigned FAR *have;
+unsigned char FAR *buf;
+unsigned len;
+{
+ unsigned got;
+ unsigned next;
+
+ got = *have;
+ next = 0;
+ while (next < len && got < 4) {
+ if ((int)(buf[next]) == (got < 2 ? 0 : 0xff))
+ got++;
+ else if (buf[next])
+ got = 0;
+ else
+ got = 4 - got;
+ next++;
+ }
+ *have = got;
+ return next;
+}
+
+int ZEXPORT inflateSync(strm)
+z_streamp strm;
+{
+ unsigned len; /* number of bytes to look at or looked at */
+ unsigned long in, out; /* temporary to save total_in and total_out */
+ unsigned char buf[4]; /* to restore bit buffer to byte string */
+ struct inflate_state FAR *state;
+
+ /* check parameters */
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
+
+ /* if first time, start search in bit buffer */
+ if (state->mode != SYNC) {
+ state->mode = SYNC;
+ state->hold <<= state->bits & 7;
+ state->bits -= state->bits & 7;
+ len = 0;
+ while (state->bits >= 8) {
+ buf[len++] = (unsigned char)(state->hold);
+ state->hold >>= 8;
+ state->bits -= 8;
+ }
+ state->have = 0;
+ syncsearch(&(state->have), buf, len);
+ }
+
+ /* search available input */
+ len = syncsearch(&(state->have), strm->next_in, strm->avail_in);
+ strm->avail_in -= len;
+ strm->next_in += len;
+ strm->total_in += len;
+
+ /* return no joy or set up to restart inflate() on a new block */
+ if (state->have != 4) return Z_DATA_ERROR;
+ in = strm->total_in; out = strm->total_out;
+ inflateReset(strm);
+ strm->total_in = in; strm->total_out = out;
+ state->mode = TYPE;
+ return Z_OK;
+}
+
+/*
+ Returns true if inflate is currently at the end of a block generated by
+ Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
+ implementation to provide an additional safety check. PPP uses
+ Z_SYNC_FLUSH but removes the length bytes of the resulting empty stored
+ block. When decompressing, PPP checks that at the end of input packet,
+ inflate is waiting for these length bytes.
+ */
+int ZEXPORT inflateSyncPoint(strm)
+z_streamp strm;
+{
+ struct inflate_state FAR *state;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ return state->mode == STORED && state->bits == 0;
+}
+
+int ZEXPORT inflateCopy(dest, source)
+z_streamp dest;
+z_streamp source;
+{
+ struct inflate_state FAR *state;
+ struct inflate_state FAR *copy;
+ unsigned char FAR *window;
+ unsigned wsize;
+
+ /* check input */
+ if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
+ source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
+ return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)source->state;
+
+ /* allocate space */
+ copy = (struct inflate_state FAR *)
+ ZALLOC(source, 1, sizeof(struct inflate_state));
+ if (copy == Z_NULL) return Z_MEM_ERROR;
+ window = Z_NULL;
+ if (state->window != Z_NULL) {
+ window = (unsigned char FAR *)
+ ZALLOC(source, 1U << state->wbits, sizeof(unsigned char));
+ if (window == Z_NULL) {
+ ZFREE(source, copy);
+ return Z_MEM_ERROR;
+ }
+ }
+
+ /* copy state */
+ zmemcpy(dest, source, sizeof(z_stream));
+ zmemcpy(copy, state, sizeof(struct inflate_state));
+ if (state->lencode >= state->codes &&
+ state->lencode <= state->codes + ENOUGH - 1) {
+ copy->lencode = copy->codes + (state->lencode - state->codes);
+ copy->distcode = copy->codes + (state->distcode - state->codes);
+ }
+ copy->next = copy->codes + (state->next - state->codes);
+ if (window != Z_NULL) {
+ wsize = 1U << state->wbits;
+ zmemcpy(window, state->window, wsize);
+ }
+ copy->window = window;
+ dest->state = (struct internal_state FAR *)copy;
+ return Z_OK;
+}
--- /dev/null
+/* inflate.h -- internal inflate state definition
+ * Copyright (C) 1995-2004 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* define NO_GZIP when compiling if you want to disable gzip header and
+ trailer decoding by inflate(). NO_GZIP would be used to avoid linking in
+ the crc code when it is not needed. For shared libraries, gzip decoding
+ should be left enabled. */
+#ifndef NO_GZIP
+# define GUNZIP
+#endif
+
+/* Possible inflate modes between inflate() calls */
+typedef enum {
+ HEAD, /* i: waiting for magic header */
+ FLAGS, /* i: waiting for method and flags (gzip) */
+ TIME, /* i: waiting for modification time (gzip) */
+ OS, /* i: waiting for extra flags and operating system (gzip) */
+ EXLEN, /* i: waiting for extra length (gzip) */
+ EXTRA, /* i: waiting for extra bytes (gzip) */
+ NAME, /* i: waiting for end of file name (gzip) */
+ COMMENT, /* i: waiting for end of comment (gzip) */
+ HCRC, /* i: waiting for header crc (gzip) */
+ DICTID, /* i: waiting for dictionary check value */
+ DICT, /* waiting for inflateSetDictionary() call */
+ TYPE, /* i: waiting for type bits, including last-flag bit */
+ TYPEDO, /* i: same, but skip check to exit inflate on new block */
+ STORED, /* i: waiting for stored size (length and complement) */
+ COPY, /* i/o: waiting for input or output to copy stored block */
+ TABLE, /* i: waiting for dynamic block table lengths */
+ LENLENS, /* i: waiting for code length code lengths */
+ CODELENS, /* i: waiting for length/lit and distance code lengths */
+ LEN, /* i: waiting for length/lit code */
+ LENEXT, /* i: waiting for length extra bits */
+ DIST, /* i: waiting for distance code */
+ DISTEXT, /* i: waiting for distance extra bits */
+ MATCH, /* o: waiting for output space to copy string */
+ LIT, /* o: waiting for output space to write literal */
+ CHECK, /* i: waiting for 32-bit check value */
+ LENGTH, /* i: waiting for 32-bit length (gzip) */
+ DONE, /* finished check, done -- remain here until reset */
+ BAD, /* got a data error -- remain here until reset */
+ MEM, /* got an inflate() memory error -- remain here until reset */
+ SYNC /* looking for synchronization bytes to restart inflate() */
+} inflate_mode;
+
+/*
+ State transitions between above modes -
+
+ (most modes can go to the BAD or MEM mode -- not shown for clarity)
+
+ Process header:
+ HEAD -> (gzip) or (zlib)
+ (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
+ NAME -> COMMENT -> HCRC -> TYPE
+ (zlib) -> DICTID or TYPE
+ DICTID -> DICT -> TYPE
+ Read deflate blocks:
+ TYPE -> STORED or TABLE or LEN or CHECK
+ STORED -> COPY -> TYPE
+ TABLE -> LENLENS -> CODELENS -> LEN
+ Read deflate codes:
+ LEN -> LENEXT or LIT or TYPE
+ LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
+ LIT -> LEN
+ Process trailer:
+ CHECK -> LENGTH -> DONE
+ */
+
+/* state maintained between inflate() calls. Approximately 7K bytes. */
+struct inflate_state {
+ inflate_mode mode; /* current inflate mode */
+ int last; /* true if processing last block */
+ int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
+ int havedict; /* true if dictionary provided */
+ int flags; /* gzip header method and flags (0 if zlib) */
+ unsigned dmax; /* zlib header max distance (INFLATE_STRICT) */
+ unsigned long check; /* protected copy of check value */
+ unsigned long total; /* protected copy of output count */
+ gz_headerp head; /* where to save gzip header information */
+ /* sliding window */
+ unsigned wbits; /* log base 2 of requested window size */
+ unsigned wsize; /* window size or zero if not using window */
+ unsigned whave; /* valid bytes in the window */
+ unsigned write; /* window write index */
+ unsigned char FAR *window; /* allocated sliding window, if needed */
+ /* bit accumulator */
+ unsigned long hold; /* input bit accumulator */
+ unsigned bits; /* number of bits in "in" */
+ /* for string and stored block copying */
+ unsigned length; /* literal or length of data to copy */
+ unsigned offset; /* distance back to copy string from */
+ /* for table and code decoding */
+ unsigned extra; /* extra bits needed */
+ /* fixed and dynamic code tables */
+ code const FAR *lencode; /* starting table for length/literal codes */
+ code const FAR *distcode; /* starting table for distance codes */
+ unsigned lenbits; /* index bits for lencode */
+ unsigned distbits; /* index bits for distcode */
+ /* dynamic table building */
+ unsigned ncode; /* number of code length code lengths */
+ unsigned nlen; /* number of length code lengths */
+ unsigned ndist; /* number of distance code lengths */
+ unsigned have; /* number of code lengths in lens[] */
+ code FAR *next; /* next available space in codes[] */
+ unsigned short lens[320]; /* temporary storage for code lengths */
+ unsigned short work[288]; /* work area for code table building */
+ code codes[ENOUGH]; /* space for code tables */
+};
--- /dev/null
+/* inftrees.c -- generate Huffman trees for efficient decoding
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+
+#define MAXBITS 15
+
+const char inflate_copyright[] =
+ " inflate 1.2.3 Copyright 1995-2005 Mark Adler ";
+/*
+ If you use the zlib library in a product, an acknowledgment is welcome
+ in the documentation of your product. If for some reason you cannot
+ include such an acknowledgment, I would appreciate that you keep this
+ copyright string in the executable of your product.
+ */
+
+/*
+ Build a set of tables to decode the provided canonical Huffman code.
+ The code lengths are lens[0..codes-1]. The result starts at *table,
+ whose indices are 0..2^bits-1. work is a writable array of at least
+ lens shorts, which is used as a work area. type is the type of code
+ to be generated, CODES, LENS, or DISTS. On return, zero is success,
+ -1 is an invalid code, and +1 means that ENOUGH isn't enough. table
+ on return points to the next available entry's address. bits is the
+ requested root table index bits, and on return it is the actual root
+ table index bits. It will differ if the request is greater than the
+ longest code or if it is less than the shortest code.
+ */
+int inflate_table(type, lens, codes, table, bits, work)
+codetype type;
+unsigned short FAR *lens;
+unsigned codes;
+code FAR * FAR *table;
+unsigned FAR *bits;
+unsigned short FAR *work;
+{
+ unsigned len; /* a code's length in bits */
+ unsigned sym; /* index of code symbols */
+ unsigned min, max; /* minimum and maximum code lengths */
+ unsigned root; /* number of index bits for root table */
+ unsigned curr; /* number of index bits for current table */
+ unsigned drop; /* code bits to drop for sub-table */
+ int left; /* number of prefix codes available */
+ unsigned used; /* code entries in table used */
+ unsigned huff; /* Huffman code */
+ unsigned incr; /* for incrementing code, index */
+ unsigned fill; /* index for replicating entries */
+ unsigned low; /* low bits for current root entry */
+ unsigned mask; /* mask for low root bits */
+ code this; /* table entry for duplication */
+ code FAR *next; /* next available space in table */
+ const unsigned short FAR *base; /* base value table to use */
+ const unsigned short FAR *extra; /* extra bits table to use */
+ int end; /* use base and extra for symbol > end */
+ unsigned short count[MAXBITS+1]; /* number of codes of each length */
+ unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
+ static const unsigned short lbase[31] = { /* Length codes 257..285 base */
+ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+ 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
+ static const unsigned short lext[31] = { /* Length codes 257..285 extra */
+ 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
+ 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 201, 196};
+ static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
+ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+ 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+ 8193, 12289, 16385, 24577, 0, 0};
+ static const unsigned short dext[32] = { /* Distance codes 0..29 extra */
+ 16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
+ 23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
+ 28, 28, 29, 29, 64, 64};
+
+ /*
+ Process a set of code lengths to create a canonical Huffman code. The
+ code lengths are lens[0..codes-1]. Each length corresponds to the
+ symbols 0..codes-1. The Huffman code is generated by first sorting the
+ symbols by length from short to long, and retaining the symbol order
+ for codes with equal lengths. Then the code starts with all zero bits
+ for the first code of the shortest length, and the codes are integer
+ increments for the same length, and zeros are appended as the length
+ increases. For the deflate format, these bits are stored backwards
+ from their more natural integer increment ordering, and so when the
+ decoding tables are built in the large loop below, the integer codes
+ are incremented backwards.
+
+ This routine assumes, but does not check, that all of the entries in
+ lens[] are in the range 0..MAXBITS. The caller must assure this.
+ 1..MAXBITS is interpreted as that code length. zero means that that
+ symbol does not occur in this code.
+
+ The codes are sorted by computing a count of codes for each length,
+ creating from that a table of starting indices for each length in the
+ sorted table, and then entering the symbols in order in the sorted
+ table. The sorted table is work[], with that space being provided by
+ the caller.
+
+ The length counts are used for other purposes as well, i.e. finding
+ the minimum and maximum length codes, determining if there are any
+ codes at all, checking for a valid set of lengths, and looking ahead
+ at length counts to determine sub-table sizes when building the
+ decoding tables.
+ */
+
+ /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
+ for (len = 0; len <= MAXBITS; len++)
+ count[len] = 0;
+ for (sym = 0; sym < codes; sym++)
+ count[lens[sym]]++;
+
+ /* bound code lengths, force root to be within code lengths */
+ root = *bits;
+ for (max = MAXBITS; max >= 1; max--)
+ if (count[max] != 0) break;
+ if (root > max) root = max;
+ if (max == 0) { /* no symbols to code at all */
+ this.op = (unsigned char)64; /* invalid code marker */
+ this.bits = (unsigned char)1;
+ this.val = (unsigned short)0;
+ *(*table)++ = this; /* make a table to force an error */
+ *(*table)++ = this;
+ *bits = 1;
+ return 0; /* no symbols, but wait for decoding to report error */
+ }
+ for (min = 1; min <= MAXBITS; min++)
+ if (count[min] != 0) break;
+ if (root < min) root = min;
+
+ /* check for an over-subscribed or incomplete set of lengths */
+ left = 1;
+ for (len = 1; len <= MAXBITS; len++) {
+ left <<= 1;
+ left -= count[len];
+ if (left < 0) return -1; /* over-subscribed */
+ }
+ if (left > 0 && (type == CODES || max != 1))
+ return -1; /* incomplete set */
+
+ /* generate offsets into symbol table for each length for sorting */
+ offs[1] = 0;
+ for (len = 1; len < MAXBITS; len++)
+ offs[len + 1] = offs[len] + count[len];
+
+ /* sort symbols by length, by symbol order within each length */
+ for (sym = 0; sym < codes; sym++)
+ if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
+
+ /*
+ Create and fill in decoding tables. In this loop, the table being
+ filled is at next and has curr index bits. The code being used is huff
+ with length len. That code is converted to an index by dropping drop
+ bits off of the bottom. For codes where len is less than drop + curr,
+ those top drop + curr - len bits are incremented through all values to
+ fill the table with replicated entries.
+
+ root is the number of index bits for the root table. When len exceeds
+ root, sub-tables are created pointed to by the root entry with an index
+ of the low root bits of huff. This is saved in low to check for when a
+ new sub-table should be started. drop is zero when the root table is
+ being filled, and drop is root when sub-tables are being filled.
+
+ When a new sub-table is needed, it is necessary to look ahead in the
+ code lengths to determine what size sub-table is needed. The length
+ counts are used for this, and so count[] is decremented as codes are
+ entered in the tables.
+
+ used keeps track of how many table entries have been allocated from the
+ provided *table space. It is checked when a LENS table is being made
+ against the space in *table, ENOUGH, minus the maximum space needed by
+ the worst case distance code, MAXD. This should never happen, but the
+ sufficiency of ENOUGH has not been proven exhaustively, hence the check.
+ This assumes that when type == LENS, bits == 9.
+
+ sym increments through all symbols, and the loop terminates when
+ all codes of length max, i.e. all codes, have been processed. This
+ routine permits incomplete codes, so another loop after this one fills
+ in the rest of the decoding tables with invalid code markers.
+ */
+
+ /* set up for code type */
+ switch (type) {
+ case CODES:
+ base = extra = work; /* dummy value--not used */
+ end = 19;
+ break;
+ case LENS:
+ base = lbase;
+ base -= 257;
+ extra = lext;
+ extra -= 257;
+ end = 256;
+ break;
+ default: /* DISTS */
+ base = dbase;
+ extra = dext;
+ end = -1;
+ }
+
+ /* initialize state for loop */
+ huff = 0; /* starting code */
+ sym = 0; /* starting code symbol */
+ len = min; /* starting code length */
+ next = *table; /* current table to fill in */
+ curr = root; /* current table index bits */
+ drop = 0; /* current bits to drop from code for index */
+ low = (unsigned)(-1); /* trigger new sub-table when len > root */
+ used = 1U << root; /* use root table entries */
+ mask = used - 1; /* mask for comparing low */
+
+ /* check available table space */
+ if (type == LENS && used >= ENOUGH - MAXD)
+ return 1;
+
+ /* process all codes and make table entries */
+ for (;;) {
+ /* create table entry */
+ this.bits = (unsigned char)(len - drop);
+ if ((int)(work[sym]) < end) {
+ this.op = (unsigned char)0;
+ this.val = work[sym];
+ }
+ else if ((int)(work[sym]) > end) {
+ this.op = (unsigned char)(extra[work[sym]]);
+ this.val = base[work[sym]];
+ }
+ else {
+ this.op = (unsigned char)(32 + 64); /* end of block */
+ this.val = 0;
+ }
+
+ /* replicate for those indices with low len bits equal to huff */
+ incr = 1U << (len - drop);
+ fill = 1U << curr;
+ min = fill; /* save offset to next table */
+ do {
+ fill -= incr;
+ next[(huff >> drop) + fill] = this;
+ } while (fill != 0);
+
+ /* backwards increment the len-bit code huff */
+ incr = 1U << (len - 1);
+ while (huff & incr)
+ incr >>= 1;
+ if (incr != 0) {
+ huff &= incr - 1;
+ huff += incr;
+ }
+ else
+ huff = 0;
+
+ /* go to next symbol, update count, len */
+ sym++;
+ if (--(count[len]) == 0) {
+ if (len == max) break;
+ len = lens[work[sym]];
+ }
+
+ /* create new sub-table if needed */
+ if (len > root && (huff & mask) != low) {
+ /* if first time, transition to sub-tables */
+ if (drop == 0)
+ drop = root;
+
+ /* increment past last table */
+ next += min; /* here min is 1 << curr */
+
+ /* determine length of next table */
+ curr = len - drop;
+ left = (int)(1 << curr);
+ while (curr + drop < max) {
+ left -= count[curr + drop];
+ if (left <= 0) break;
+ curr++;
+ left <<= 1;
+ }
+
+ /* check for enough space */
+ used += 1U << curr;
+ if (type == LENS && used >= ENOUGH - MAXD)
+ return 1;
+
+ /* point entry in root table to sub-table */
+ low = huff & mask;
+ (*table)[low].op = (unsigned char)curr;
+ (*table)[low].bits = (unsigned char)root;
+ (*table)[low].val = (unsigned short)(next - *table);
+ }
+ }
+
+ /*
+ Fill in rest of table for incomplete codes. This loop is similar to the
+ loop above in incrementing huff for table indices. It is assumed that
+ len is equal to curr + drop, so there is no loop needed to increment
+ through high index bits. When the current sub-table is filled, the loop
+ drops back to the root table to fill in any remaining entries there.
+ */
+ this.op = (unsigned char)64; /* invalid code marker */
+ this.bits = (unsigned char)(len - drop);
+ this.val = (unsigned short)0;
+ while (huff != 0) {
+ /* when done with sub-table, drop back to root table */
+ if (drop != 0 && (huff & mask) != low) {
+ drop = 0;
+ len = root;
+ next = *table;
+ this.bits = (unsigned char)len;
+ }
+
+ /* put invalid code marker in table */
+ next[huff >> drop] = this;
+
+ /* backwards increment the len-bit code huff */
+ incr = 1U << (len - 1);
+ while (huff & incr)
+ incr >>= 1;
+ if (incr != 0) {
+ huff &= incr - 1;
+ huff += incr;
+ }
+ else
+ huff = 0;
+ }
+
+ /* set return parameters */
+ *table += used;
+ *bits = root;
+ return 0;
+}
--- /dev/null
+/* inftrees.h -- header to use inftrees.c
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* Structure for decoding tables. Each entry provides either the
+ information needed to do the operation requested by the code that
+ indexed that table entry, or it provides a pointer to another
+ table that indexes more bits of the code. op indicates whether
+ the entry is a pointer to another table, a literal, a length or
+ distance, an end-of-block, or an invalid code. For a table
+ pointer, the low four bits of op is the number of index bits of
+ that table. For a length or distance, the low four bits of op
+ is the number of extra bits to get after the code. bits is
+ the number of bits in this code or part of the code to drop off
+ of the bit buffer. val is the actual byte to output in the case
+ of a literal, the base length or distance, or the offset from
+ the current table to the next table. Each entry is four bytes. */
+typedef struct {
+ unsigned char op; /* operation, extra bits, table bits */
+ unsigned char bits; /* bits in this part of the code */
+ unsigned short val; /* offset in table or code value */
+} code;
+
+/* op values as set by inflate_table():
+ 00000000 - literal
+ 0000tttt - table link, tttt != 0 is the number of table index bits
+ 0001eeee - length or distance, eeee is the number of extra bits
+ 01100000 - end of block
+ 01000000 - invalid code
+ */
+
+/* Maximum size of dynamic tree. The maximum found in a long but non-
+ exhaustive search was 1444 code structures (852 for length/literals
+ and 592 for distances, the latter actually the result of an
+ exhaustive search). The true maximum is not known, but the value
+ below is more than safe. */
+#define ENOUGH 2048
+#define MAXD 592
+
+/* Type of code to build for inftable() */
+typedef enum {
+ CODES,
+ LENS,
+ DISTS
+} codetype;
+
+extern int inflate_table OF((codetype type, unsigned short FAR *lens,
+ unsigned codes, code FAR * FAR *table,
+ unsigned FAR *bits, unsigned short FAR *work));
--- /dev/null
+/* minigzip.c -- simulate gzip using the zlib compression library
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * minigzip is a minimal implementation of the gzip utility. This is
+ * only an example of using zlib and isn't meant to replace the
+ * full-featured gzip. No attempt is made to deal with file systems
+ * limiting names to 14 or 8+3 characters, etc... Error checking is
+ * very limited. So use minigzip only for testing; use gzip for the
+ * real thing. On MSDOS, use only on file names without extension
+ * or in pipe mode.
+ */
+
+/* @(#) $Id$ */
+
+#include <stdio.h>
+#include "zlib.h"
+
+#ifdef STDC
+# include <string.h>
+# include <stdlib.h>
+#endif
+
+#ifdef USE_MMAP
+# include <sys/types.h>
+# include <sys/mman.h>
+# include <sys/stat.h>
+#endif
+
+#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
+# include <fcntl.h>
+# include <io.h>
+# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#else
+# define SET_BINARY_MODE(file)
+#endif
+
+#ifdef VMS
+# define unlink delete
+# define GZ_SUFFIX "-gz"
+#endif
+#ifdef RISCOS
+# define unlink remove
+# define GZ_SUFFIX "-gz"
+# define fileno(file) file->__file
+#endif
+#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+# include <unix.h> /* for fileno */
+#endif
+
+#ifndef WIN32 /* unlink already in stdio.h for WIN32 */
+ extern int unlink OF((const char *));
+#endif
+
+#ifndef GZ_SUFFIX
+# define GZ_SUFFIX ".gz"
+#endif
+#define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
+
+#define BUFLEN 16384
+#define MAX_NAME_LEN 1024
+
+#ifdef MAXSEG_64K
+# define local static
+ /* Needed for systems with limitation on stack size. */
+#else
+# define local
+#endif
+
+char *prog;
+
+void error OF((const char *msg));
+void gz_compress OF((FILE *in, gzFile out));
+#ifdef USE_MMAP
+int gz_compress_mmap OF((FILE *in, gzFile out));
+#endif
+void gz_uncompress OF((gzFile in, FILE *out));
+void file_compress OF((char *file, char *mode));
+void file_uncompress OF((char *file));
+int main OF((int argc, char *argv[]));
+
+/* ===========================================================================
+ * Display error message and exit
+ */
+void error(msg)
+ const char *msg;
+{
+ fprintf(stderr, "%s: %s\n", prog, msg);
+ exit(1);
+}
+
+/* ===========================================================================
+ * Compress input to output then close both files.
+ */
+
+void gz_compress(in, out)
+ FILE *in;
+ gzFile out;
+{
+ local char buf[BUFLEN];
+ int len;
+ int err;
+
+#ifdef USE_MMAP
+ /* Try first compressing with mmap. If mmap fails (minigzip used in a
+ * pipe), use the normal fread loop.
+ */
+ if (gz_compress_mmap(in, out) == Z_OK) return;
+#endif
+ for (;;) {
+ len = (int)fread(buf, 1, sizeof(buf), in);
+ if (ferror(in)) {
+ perror("fread");
+ exit(1);
+ }
+ if (len == 0) break;
+
+ if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
+ }
+ fclose(in);
+ if (gzclose(out) != Z_OK) error("failed gzclose");
+}
+
+#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
+
+/* Try compressing the input file at once using mmap. Return Z_OK if
+ * if success, Z_ERRNO otherwise.
+ */
+int gz_compress_mmap(in, out)
+ FILE *in;
+ gzFile out;
+{
+ int len;
+ int err;
+ int ifd = fileno(in);
+ caddr_t buf; /* mmap'ed buffer for the entire input file */
+ off_t buf_len; /* length of the input file */
+ struct stat sb;
+
+ /* Determine the size of the file, needed for mmap: */
+ if (fstat(ifd, &sb) < 0) return Z_ERRNO;
+ buf_len = sb.st_size;
+ if (buf_len <= 0) return Z_ERRNO;
+
+ /* Now do the actual mmap: */
+ buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
+ if (buf == (caddr_t)(-1)) return Z_ERRNO;
+
+ /* Compress the whole file at once: */
+ len = gzwrite(out, (char *)buf, (unsigned)buf_len);
+
+ if (len != (int)buf_len) error(gzerror(out, &err));
+
+ munmap(buf, buf_len);
+ fclose(in);
+ if (gzclose(out) != Z_OK) error("failed gzclose");
+ return Z_OK;
+}
+#endif /* USE_MMAP */
+
+/* ===========================================================================
+ * Uncompress input to output then close both files.
+ */
+void gz_uncompress(in, out)
+ gzFile in;
+ FILE *out;
+{
+ local char buf[BUFLEN];
+ int len;
+ int err;
+
+ for (;;) {
+ len = gzread(in, buf, sizeof(buf));
+ if (len < 0) error (gzerror(in, &err));
+ if (len == 0) break;
+
+ if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {
+ error("failed fwrite");
+ }
+ }
+ if (fclose(out)) error("failed fclose");
+
+ if (gzclose(in) != Z_OK) error("failed gzclose");
+}
+
+
+/* ===========================================================================
+ * Compress the given file: create a corresponding .gz file and remove the
+ * original.
+ */
+void file_compress(file, mode)
+ char *file;
+ char *mode;
+{
+ local char outfile[MAX_NAME_LEN];
+ FILE *in;
+ gzFile out;
+
+ strcpy(outfile, file);
+ strcat(outfile, GZ_SUFFIX);
+
+ in = fopen(file, "rb");
+ if (in == NULL) {
+ perror(file);
+ exit(1);
+ }
+ out = gzopen(outfile, mode);
+ if (out == NULL) {
+ fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
+ exit(1);
+ }
+ gz_compress(in, out);
+
+ unlink(file);
+}
+
+
+/* ===========================================================================
+ * Uncompress the given file and remove the original.
+ */
+void file_uncompress(file)
+ char *file;
+{
+ local char buf[MAX_NAME_LEN];
+ char *infile, *outfile;
+ FILE *out;
+ gzFile in;
+ uInt len = (uInt)strlen(file);
+
+ strcpy(buf, file);
+
+ if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {
+ infile = file;
+ outfile = buf;
+ outfile[len-3] = '\0';
+ } else {
+ outfile = file;
+ infile = buf;
+ strcat(infile, GZ_SUFFIX);
+ }
+ in = gzopen(infile, "rb");
+ if (in == NULL) {
+ fprintf(stderr, "%s: can't gzopen %s\n", prog, infile);
+ exit(1);
+ }
+ out = fopen(outfile, "wb");
+ if (out == NULL) {
+ perror(file);
+ exit(1);
+ }
+
+ gz_uncompress(in, out);
+
+ unlink(infile);
+}
+
+
+/* ===========================================================================
+ * Usage: minigzip [-d] [-f] [-h] [-r] [-1 to -9] [files...]
+ * -d : decompress
+ * -f : compress with Z_FILTERED
+ * -h : compress with Z_HUFFMAN_ONLY
+ * -r : compress with Z_RLE
+ * -1 to -9 : compression level
+ */
+
+int main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ int uncompr = 0;
+ gzFile file;
+ char outmode[20];
+
+ strcpy(outmode, "wb6 ");
+
+ prog = argv[0];
+ argc--, argv++;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "-d") == 0)
+ uncompr = 1;
+ else if (strcmp(*argv, "-f") == 0)
+ outmode[3] = 'f';
+ else if (strcmp(*argv, "-h") == 0)
+ outmode[3] = 'h';
+ else if (strcmp(*argv, "-r") == 0)
+ outmode[3] = 'R';
+ else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' &&
+ (*argv)[2] == 0)
+ outmode[2] = (*argv)[1];
+ else
+ break;
+ argc--, argv++;
+ }
+ if (outmode[3] == ' ')
+ outmode[3] = 0;
+ if (argc == 0) {
+ SET_BINARY_MODE(stdin);
+ SET_BINARY_MODE(stdout);
+ if (uncompr) {
+ file = gzdopen(fileno(stdin), "rb");
+ if (file == NULL) error("can't gzdopen stdin");
+ gz_uncompress(file, stdout);
+ } else {
+ file = gzdopen(fileno(stdout), outmode);
+ if (file == NULL) error("can't gzdopen stdout");
+ gz_compress(stdin, file);
+ }
+ } else {
+ do {
+ if (uncompr) {
+ file_uncompress(*argv);
+ } else {
+ file_compress(*argv, outmode);
+ }
+ } while (argv++, --argc);
+ }
+ return 0;
+}
--- /dev/null
+/* trees.c -- output deflated data using Huffman coding
+ * Copyright (C) 1995-2005 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/*
+ * ALGORITHM
+ *
+ * The "deflation" process uses several Huffman trees. The more
+ * common source values are represented by shorter bit sequences.
+ *
+ * Each code tree is stored in a compressed form which is itself
+ * a Huffman encoding of the lengths of all the code strings (in
+ * ascending order by source values). The actual code strings are
+ * reconstructed from the lengths in the inflate process, as described
+ * in the deflate specification.
+ *
+ * REFERENCES
+ *
+ * Deutsch, L.P.,"'Deflate' Compressed Data Format Specification".
+ * Available in ftp.uu.net:/pub/archiving/zip/doc/deflate-1.1.doc
+ *
+ * Storer, James A.
+ * Data Compression: Methods and Theory, pp. 49-50.
+ * Computer Science Press, 1988. ISBN 0-7167-8156-5.
+ *
+ * Sedgewick, R.
+ * Algorithms, p290.
+ * Addison-Wesley, 1983. ISBN 0-201-06672-6.
+ */
+
+/* @(#) $Id$ */
+
+/* #define GEN_TREES_H */
+
+#include "deflate.h"
+
+#ifdef DEBUG
+# include <ctype.h>
+#endif
+
+/* ===========================================================================
+ * Constants
+ */
+
+#define MAX_BL_BITS 7
+/* Bit length codes must not exceed MAX_BL_BITS bits */
+
+#define END_BLOCK 256
+/* end of block literal code */
+
+#define REP_3_6 16
+/* repeat previous bit length 3-6 times (2 bits of repeat count) */
+
+#define REPZ_3_10 17
+/* repeat a zero length 3-10 times (3 bits of repeat count) */
+
+#define REPZ_11_138 18
+/* repeat a zero length 11-138 times (7 bits of repeat count) */
+
+local const int extra_lbits[LENGTH_CODES] /* extra bits for each length code */
+ = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};
+
+local const int extra_dbits[D_CODES] /* extra bits for each distance code */
+ = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
+
+local const int extra_blbits[BL_CODES]/* extra bits for each bit length code */
+ = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};
+
+local const uch bl_order[BL_CODES]
+ = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15};
+/* The lengths of the bit length codes are sent in order of decreasing
+ * probability, to avoid transmitting the lengths for unused bit length codes.
+ */
+
+#define Buf_size (8 * 2*sizeof(char))
+/* Number of bits used within bi_buf. (bi_buf might be implemented on
+ * more than 16 bits on some systems.)
+ */
+
+/* ===========================================================================
+ * Local data. These are initialized only once.
+ */
+
+#define DIST_CODE_LEN 512 /* see definition of array dist_code below */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+/* non ANSI compilers may not accept trees.h */
+
+local ct_data static_ltree[L_CODES+2];
+/* The static literal tree. Since the bit lengths are imposed, there is no
+ * need for the L_CODES extra codes used during heap construction. However
+ * The codes 286 and 287 are needed to build a canonical tree (see _tr_init
+ * below).
+ */
+
+local ct_data static_dtree[D_CODES];
+/* The static distance tree. (Actually a trivial tree since all codes use
+ * 5 bits.)
+ */
+
+uch _dist_code[DIST_CODE_LEN];
+/* Distance codes. The first 256 values correspond to the distances
+ * 3 .. 258, the last 256 values correspond to the top 8 bits of
+ * the 15 bit distances.
+ */
+
+uch _length_code[MAX_MATCH-MIN_MATCH+1];
+/* length code for each normalized match length (0 == MIN_MATCH) */
+
+local int base_length[LENGTH_CODES];
+/* First normalized length for each code (0 = MIN_MATCH) */
+
+local int base_dist[D_CODES];
+/* First normalized distance for each code (0 = distance of 1) */
+
+#else
+# include "trees.h"
+#endif /* GEN_TREES_H */
+
+struct static_tree_desc_s {
+ const ct_data *static_tree; /* static tree or NULL */
+ const intf *extra_bits; /* extra bits for each code or NULL */
+ int extra_base; /* base index for extra_bits */
+ int elems; /* max number of elements in the tree */
+ int max_length; /* max bit length for the codes */
+};
+
+local static_tree_desc static_l_desc =
+{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS};
+
+local static_tree_desc static_d_desc =
+{static_dtree, extra_dbits, 0, D_CODES, MAX_BITS};
+
+local static_tree_desc static_bl_desc =
+{(const ct_data *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS};
+
+/* ===========================================================================
+ * Local (static) routines in this file.
+ */
+
+local void tr_static_init OF((void));
+local void init_block OF((deflate_state *s));
+local void pqdownheap OF((deflate_state *s, ct_data *tree, int k));
+local void gen_bitlen OF((deflate_state *s, tree_desc *desc));
+local void gen_codes OF((ct_data *tree, int max_code, ushf *bl_count));
+local void build_tree OF((deflate_state *s, tree_desc *desc));
+local void scan_tree OF((deflate_state *s, ct_data *tree, int max_code));
+local void send_tree OF((deflate_state *s, ct_data *tree, int max_code));
+local int build_bl_tree OF((deflate_state *s));
+local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
+ int blcodes));
+local void compress_block OF((deflate_state *s, ct_data *ltree,
+ ct_data *dtree));
+local void set_data_type OF((deflate_state *s));
+local unsigned bi_reverse OF((unsigned value, int length));
+local void bi_windup OF((deflate_state *s));
+local void bi_flush OF((deflate_state *s));
+local void copy_block OF((deflate_state *s, charf *buf, unsigned len,
+ int header));
+
+#ifdef GEN_TREES_H
+local void gen_trees_header OF((void));
+#endif
+
+#ifndef DEBUG
+# define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
+ /* Send a code of the given tree. c and tree must not have side effects */
+
+#else /* DEBUG */
+# define send_code(s, c, tree) \
+ { if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
+ send_bits(s, tree[c].Code, tree[c].Len); }
+#endif
+
+/* ===========================================================================
+ * Output a short LSB first on the stream.
+ * IN assertion: there is enough room in pendingBuf.
+ */
+#define put_short(s, w) { \
+ put_byte(s, (uch)((w) & 0xff)); \
+ put_byte(s, (uch)((ush)(w) >> 8)); \
+}
+
+/* ===========================================================================
+ * Send a value on a given number of bits.
+ * IN assertion: length <= 16 and value fits in length bits.
+ */
+#ifdef DEBUG
+local void send_bits OF((deflate_state *s, int value, int length));
+
+local void send_bits(s, value, length)
+ deflate_state *s;
+ int value; /* value to send */
+ int length; /* number of bits */
+{
+ Tracevv((stderr," l %2d v %4x ", length, value));
+ Assert(length > 0 && length <= 15, "invalid length");
+ s->bits_sent += (ulg)length;
+
+ /* If not enough room in bi_buf, use (valid) bits from bi_buf and
+ * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
+ * unused bits in value.
+ */
+ if (s->bi_valid > (int)Buf_size - length) {
+ s->bi_buf |= (value << s->bi_valid);
+ put_short(s, s->bi_buf);
+ s->bi_buf = (ush)value >> (Buf_size - s->bi_valid);
+ s->bi_valid += length - Buf_size;
+ } else {
+ s->bi_buf |= value << s->bi_valid;
+ s->bi_valid += length;
+ }
+}
+#else /* !DEBUG */
+
+#define send_bits(s, value, length) \
+{ int len = length;\
+ if (s->bi_valid > (int)Buf_size - len) {\
+ int val = value;\
+ s->bi_buf |= (val << s->bi_valid);\
+ put_short(s, s->bi_buf);\
+ s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
+ s->bi_valid += len - Buf_size;\
+ } else {\
+ s->bi_buf |= (value) << s->bi_valid;\
+ s->bi_valid += len;\
+ }\
+}
+#endif /* DEBUG */
+
+
+/* the arguments must not have side effects */
+
+/* ===========================================================================
+ * Initialize the various 'constant' tables.
+ */
+local void tr_static_init()
+{
+#if defined(GEN_TREES_H) || !defined(STDC)
+ static int static_init_done = 0;
+ int n; /* iterates over tree elements */
+ int bits; /* bit counter */
+ int length; /* length value */
+ int code; /* code value */
+ int dist; /* distance index */
+ ush bl_count[MAX_BITS+1];
+ /* number of codes at each bit length for an optimal tree */
+
+ if (static_init_done) return;
+
+ /* For some embedded targets, global variables are not initialized: */
+ static_l_desc.static_tree = static_ltree;
+ static_l_desc.extra_bits = extra_lbits;
+ static_d_desc.static_tree = static_dtree;
+ static_d_desc.extra_bits = extra_dbits;
+ static_bl_desc.extra_bits = extra_blbits;
+
+ /* Initialize the mapping length (0..255) -> length code (0..28) */
+ length = 0;
+ for (code = 0; code < LENGTH_CODES-1; code++) {
+ base_length[code] = length;
+ for (n = 0; n < (1<<extra_lbits[code]); n++) {
+ _length_code[length++] = (uch)code;
+ }
+ }
+ Assert (length == 256, "tr_static_init: length != 256");
+ /* Note that the length 255 (match length 258) can be represented
+ * in two different ways: code 284 + 5 bits or code 285, so we
+ * overwrite length_code[255] to use the best encoding:
+ */
+ _length_code[length-1] = (uch)code;
+
+ /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
+ dist = 0;
+ for (code = 0 ; code < 16; code++) {
+ base_dist[code] = dist;
+ for (n = 0; n < (1<<extra_dbits[code]); n++) {
+ _dist_code[dist++] = (uch)code;
+ }
+ }
+ Assert (dist == 256, "tr_static_init: dist != 256");
+ dist >>= 7; /* from now on, all distances are divided by 128 */
+ for ( ; code < D_CODES; code++) {
+ base_dist[code] = dist << 7;
+ for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
+ _dist_code[256 + dist++] = (uch)code;
+ }
+ }
+ Assert (dist == 256, "tr_static_init: 256+dist != 512");
+
+ /* Construct the codes of the static literal tree */
+ for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
+ n = 0;
+ while (n <= 143) static_ltree[n++].Len = 8, bl_count[8]++;
+ while (n <= 255) static_ltree[n++].Len = 9, bl_count[9]++;
+ while (n <= 279) static_ltree[n++].Len = 7, bl_count[7]++;
+ while (n <= 287) static_ltree[n++].Len = 8, bl_count[8]++;
+ /* Codes 286 and 287 do not exist, but we must include them in the
+ * tree construction to get a canonical Huffman tree (longest code
+ * all ones)
+ */
+ gen_codes((ct_data *)static_ltree, L_CODES+1, bl_count);
+
+ /* The static distance tree is trivial: */
+ for (n = 0; n < D_CODES; n++) {
+ static_dtree[n].Len = 5;
+ static_dtree[n].Code = bi_reverse((unsigned)n, 5);
+ }
+ static_init_done = 1;
+
+# ifdef GEN_TREES_H
+ gen_trees_header();
+# endif
+#endif /* defined(GEN_TREES_H) || !defined(STDC) */
+}
+
+/* ===========================================================================
+ * Genererate the file trees.h describing the static trees.
+ */
+#ifdef GEN_TREES_H
+# ifndef DEBUG
+# include <stdio.h>
+# endif
+
+# define SEPARATOR(i, last, width) \
+ ((i) == (last)? "\n};\n\n" : \
+ ((i) % (width) == (width)-1 ? ",\n" : ", "))
+
+void gen_trees_header()
+{
+ FILE *header = fopen("trees.h", "w");
+ int i;
+
+ Assert (header != NULL, "Can't open trees.h");
+ fprintf(header,
+ "/* header created automatically with -DGEN_TREES_H */\n\n");
+
+ fprintf(header, "local const ct_data static_ltree[L_CODES+2] = {\n");
+ for (i = 0; i < L_CODES+2; i++) {
+ fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,
+ static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
+ }
+
+ fprintf(header, "local const ct_data static_dtree[D_CODES] = {\n");
+ for (i = 0; i < D_CODES; i++) {
+ fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,
+ static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
+ }
+
+ fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n");
+ for (i = 0; i < DIST_CODE_LEN; i++) {
+ fprintf(header, "%2u%s", _dist_code[i],
+ SEPARATOR(i, DIST_CODE_LEN-1, 20));
+ }
+
+ fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");
+ for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {
+ fprintf(header, "%2u%s", _length_code[i],
+ SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
+ }
+
+ fprintf(header, "local const int base_length[LENGTH_CODES] = {\n");
+ for (i = 0; i < LENGTH_CODES; i++) {
+ fprintf(header, "%1u%s", base_length[i],
+ SEPARATOR(i, LENGTH_CODES-1, 20));
+ }
+
+ fprintf(header, "local const int base_dist[D_CODES] = {\n");
+ for (i = 0; i < D_CODES; i++) {
+ fprintf(header, "%5u%s", base_dist[i],
+ SEPARATOR(i, D_CODES-1, 10));
+ }
+
+ fclose(header);
+}
+#endif /* GEN_TREES_H */
+
+/* ===========================================================================
+ * Initialize the tree data structures for a new zlib stream.
+ */
+void _tr_init(s)
+ deflate_state *s;
+{
+ tr_static_init();
+
+ s->l_desc.dyn_tree = s->dyn_ltree;
+ s->l_desc.stat_desc = &static_l_desc;
+
+ s->d_desc.dyn_tree = s->dyn_dtree;
+ s->d_desc.stat_desc = &static_d_desc;
+
+ s->bl_desc.dyn_tree = s->bl_tree;
+ s->bl_desc.stat_desc = &static_bl_desc;
+
+ s->bi_buf = 0;
+ s->bi_valid = 0;
+ s->last_eob_len = 8; /* enough lookahead for inflate */
+#ifdef DEBUG
+ s->compressed_len = 0L;
+ s->bits_sent = 0L;
+#endif
+
+ /* Initialize the first block of the first file: */
+ init_block(s);
+}
+
+/* ===========================================================================
+ * Initialize a new block.
+ */
+local void init_block(s)
+ deflate_state *s;
+{
+ int n; /* iterates over tree elements */
+
+ /* Initialize the trees. */
+ for (n = 0; n < L_CODES; n++) s->dyn_ltree[n].Freq = 0;
+ for (n = 0; n < D_CODES; n++) s->dyn_dtree[n].Freq = 0;
+ for (n = 0; n < BL_CODES; n++) s->bl_tree[n].Freq = 0;
+
+ s->dyn_ltree[END_BLOCK].Freq = 1;
+ s->opt_len = s->static_len = 0L;
+ s->last_lit = s->matches = 0;
+}
+
+#define SMALLEST 1
+/* Index within the heap array of least frequent node in the Huffman tree */
+
+
+/* ===========================================================================
+ * Remove the smallest element from the heap and recreate the heap with
+ * one less element. Updates heap and heap_len.
+ */
+#define pqremove(s, tree, top) \
+{\
+ top = s->heap[SMALLEST]; \
+ s->heap[SMALLEST] = s->heap[s->heap_len--]; \
+ pqdownheap(s, tree, SMALLEST); \
+}
+
+/* ===========================================================================
+ * Compares to subtrees, using the tree depth as tie breaker when
+ * the subtrees have equal frequency. This minimizes the worst case length.
+ */
+#define smaller(tree, n, m, depth) \
+ (tree[n].Freq < tree[m].Freq || \
+ (tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))
+
+/* ===========================================================================
+ * Restore the heap property by moving down the tree starting at node k,
+ * exchanging a node with the smallest of its two sons if necessary, stopping
+ * when the heap property is re-established (each father smaller than its
+ * two sons).
+ */
+local void pqdownheap(s, tree, k)
+ deflate_state *s;
+ ct_data *tree; /* the tree to restore */
+ int k; /* node to move down */
+{
+ int v = s->heap[k];
+ int j = k << 1; /* left son of k */
+ while (j <= s->heap_len) {
+ /* Set j to the smallest of the two sons: */
+ if (j < s->heap_len &&
+ smaller(tree, s->heap[j+1], s->heap[j], s->depth)) {
+ j++;
+ }
+ /* Exit if v is smaller than both sons */
+ if (smaller(tree, v, s->heap[j], s->depth)) break;
+
+ /* Exchange v with the smallest son */
+ s->heap[k] = s->heap[j]; k = j;
+
+ /* And continue down the tree, setting j to the left son of k */
+ j <<= 1;
+ }
+ s->heap[k] = v;
+}
+
+/* ===========================================================================
+ * Compute the optimal bit lengths for a tree and update the total bit length
+ * for the current block.
+ * IN assertion: the fields freq and dad are set, heap[heap_max] and
+ * above are the tree nodes sorted by increasing frequency.
+ * OUT assertions: the field len is set to the optimal bit length, the
+ * array bl_count contains the frequencies for each bit length.
+ * The length opt_len is updated; static_len is also updated if stree is
+ * not null.
+ */
+local void gen_bitlen(s, desc)
+ deflate_state *s;
+ tree_desc *desc; /* the tree descriptor */
+{
+ ct_data *tree = desc->dyn_tree;
+ int max_code = desc->max_code;
+ const ct_data *stree = desc->stat_desc->static_tree;
+ const intf *extra = desc->stat_desc->extra_bits;
+ int base = desc->stat_desc->extra_base;
+ int max_length = desc->stat_desc->max_length;
+ int h; /* heap index */
+ int n, m; /* iterate over the tree elements */
+ int bits; /* bit length */
+ int xbits; /* extra bits */
+ ush f; /* frequency */
+ int overflow = 0; /* number of elements with bit length too large */
+
+ for (bits = 0; bits <= MAX_BITS; bits++) s->bl_count[bits] = 0;
+
+ /* In a first pass, compute the optimal bit lengths (which may
+ * overflow in the case of the bit length tree).
+ */
+ tree[s->heap[s->heap_max]].Len = 0; /* root of the heap */
+
+ for (h = s->heap_max+1; h < HEAP_SIZE; h++) {
+ n = s->heap[h];
+ bits = tree[tree[n].Dad].Len + 1;
+ if (bits > max_length) bits = max_length, overflow++;
+ tree[n].Len = (ush)bits;
+ /* We overwrite tree[n].Dad which is no longer needed */
+
+ if (n > max_code) continue; /* not a leaf node */
+
+ s->bl_count[bits]++;
+ xbits = 0;
+ if (n >= base) xbits = extra[n-base];
+ f = tree[n].Freq;
+ s->opt_len += (ulg)f * (bits + xbits);
+ if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits);
+ }
+ if (overflow == 0) return;
+
+ Trace((stderr,"\nbit length overflow\n"));
+ /* This happens for example on obj2 and pic of the Calgary corpus */
+
+ /* Find the first bit length which could increase: */
+ do {
+ bits = max_length-1;
+ while (s->bl_count[bits] == 0) bits--;
+ s->bl_count[bits]--; /* move one leaf down the tree */
+ s->bl_count[bits+1] += 2; /* move one overflow item as its brother */
+ s->bl_count[max_length]--;
+ /* The brother of the overflow item also moves one step up,
+ * but this does not affect bl_count[max_length]
+ */
+ overflow -= 2;
+ } while (overflow > 0);
+
+ /* Now recompute all bit lengths, scanning in increasing frequency.
+ * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
+ * lengths instead of fixing only the wrong ones. This idea is taken
+ * from 'ar' written by Haruhiko Okumura.)
+ */
+ for (bits = max_length; bits != 0; bits--) {
+ n = s->bl_count[bits];
+ while (n != 0) {
+ m = s->heap[--h];
+ if (m > max_code) continue;
+ if ((unsigned) tree[m].Len != (unsigned) bits) {
+ Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
+ s->opt_len += ((long)bits - (long)tree[m].Len)
+ *(long)tree[m].Freq;
+ tree[m].Len = (ush)bits;
+ }
+ n--;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Generate the codes for a given tree and bit counts (which need not be
+ * optimal).
+ * IN assertion: the array bl_count contains the bit length statistics for
+ * the given tree and the field len is set for all tree elements.
+ * OUT assertion: the field code is set for all tree elements of non
+ * zero code length.
+ */
+local void gen_codes (tree, max_code, bl_count)
+ ct_data *tree; /* the tree to decorate */
+ int max_code; /* largest code with non zero frequency */
+ ushf *bl_count; /* number of codes at each bit length */
+{
+ ush next_code[MAX_BITS+1]; /* next code value for each bit length */
+ ush code = 0; /* running code value */
+ int bits; /* bit index */
+ int n; /* code index */
+
+ /* The distribution counts are first used to generate the code values
+ * without bit reversal.
+ */
+ for (bits = 1; bits <= MAX_BITS; bits++) {
+ next_code[bits] = code = (code + bl_count[bits-1]) << 1;
+ }
+ /* Check that the bit counts in bl_count are consistent. The last code
+ * must be all ones.
+ */
+ Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
+ "inconsistent bit counts");
+ Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
+
+ for (n = 0; n <= max_code; n++) {
+ int len = tree[n].Len;
+ if (len == 0) continue;
+ /* Now reverse the bits */
+ tree[n].Code = bi_reverse(next_code[len]++, len);
+
+ Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
+ n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
+ }
+}
+
+/* ===========================================================================
+ * Construct one Huffman tree and assigns the code bit strings and lengths.
+ * Update the total bit length for the current block.
+ * IN assertion: the field freq is set for all tree elements.
+ * OUT assertions: the fields len and code are set to the optimal bit length
+ * and corresponding code. The length opt_len is updated; static_len is
+ * also updated if stree is not null. The field max_code is set.
+ */
+local void build_tree(s, desc)
+ deflate_state *s;
+ tree_desc *desc; /* the tree descriptor */
+{
+ ct_data *tree = desc->dyn_tree;
+ const ct_data *stree = desc->stat_desc->static_tree;
+ int elems = desc->stat_desc->elems;
+ int n, m; /* iterate over heap elements */
+ int max_code = -1; /* largest code with non zero frequency */
+ int node; /* new node being created */
+
+ /* Construct the initial heap, with least frequent element in
+ * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
+ * heap[0] is not used.
+ */
+ s->heap_len = 0, s->heap_max = HEAP_SIZE;
+
+ for (n = 0; n < elems; n++) {
+ if (tree[n].Freq != 0) {
+ s->heap[++(s->heap_len)] = max_code = n;
+ s->depth[n] = 0;
+ } else {
+ tree[n].Len = 0;
+ }
+ }
+
+ /* The pkzip format requires that at least one distance code exists,
+ * and that at least one bit should be sent even if there is only one
+ * possible code. So to avoid special checks later on we force at least
+ * two codes of non zero frequency.
+ */
+ while (s->heap_len < 2) {
+ node = s->heap[++(s->heap_len)] = (max_code < 2 ? ++max_code : 0);
+ tree[node].Freq = 1;
+ s->depth[node] = 0;
+ s->opt_len--; if (stree) s->static_len -= stree[node].Len;
+ /* node is 0 or 1 so it does not have extra bits */
+ }
+ desc->max_code = max_code;
+
+ /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
+ * establish sub-heaps of increasing lengths:
+ */
+ for (n = s->heap_len/2; n >= 1; n--) pqdownheap(s, tree, n);
+
+ /* Construct the Huffman tree by repeatedly combining the least two
+ * frequent nodes.
+ */
+ node = elems; /* next internal node of the tree */
+ do {
+ pqremove(s, tree, n); /* n = node of least frequency */
+ m = s->heap[SMALLEST]; /* m = node of next least frequency */
+
+ s->heap[--(s->heap_max)] = n; /* keep the nodes sorted by frequency */
+ s->heap[--(s->heap_max)] = m;
+
+ /* Create a new node father of n and m */
+ tree[node].Freq = tree[n].Freq + tree[m].Freq;
+ s->depth[node] = (uch)((s->depth[n] >= s->depth[m] ?
+ s->depth[n] : s->depth[m]) + 1);
+ tree[n].Dad = tree[m].Dad = (ush)node;
+#ifdef DUMP_BL_TREE
+ if (tree == s->bl_tree) {
+ fprintf(stderr,"\nnode %d(%d), sons %d(%d) %d(%d)",
+ node, tree[node].Freq, n, tree[n].Freq, m, tree[m].Freq);
+ }
+#endif
+ /* and insert the new node in the heap */
+ s->heap[SMALLEST] = node++;
+ pqdownheap(s, tree, SMALLEST);
+
+ } while (s->heap_len >= 2);
+
+ s->heap[--(s->heap_max)] = s->heap[SMALLEST];
+
+ /* At this point, the fields freq and dad are set. We can now
+ * generate the bit lengths.
+ */
+ gen_bitlen(s, (tree_desc *)desc);
+
+ /* The field len is now set, we can generate the bit codes */
+ gen_codes ((ct_data *)tree, max_code, s->bl_count);
+}
+
+/* ===========================================================================
+ * Scan a literal or distance tree to determine the frequencies of the codes
+ * in the bit length tree.
+ */
+local void scan_tree (s, tree, max_code)
+ deflate_state *s;
+ ct_data *tree; /* the tree to be scanned */
+ int max_code; /* and its largest code of non zero frequency */
+{
+ int n; /* iterates over all tree elements */
+ int prevlen = -1; /* last emitted length */
+ int curlen; /* length of current code */
+ int nextlen = tree[0].Len; /* length of next code */
+ int count = 0; /* repeat count of the current code */
+ int max_count = 7; /* max repeat count */
+ int min_count = 4; /* min repeat count */
+
+ if (nextlen == 0) max_count = 138, min_count = 3;
+ tree[max_code+1].Len = (ush)0xffff; /* guard */
+
+ for (n = 0; n <= max_code; n++) {
+ curlen = nextlen; nextlen = tree[n+1].Len;
+ if (++count < max_count && curlen == nextlen) {
+ continue;
+ } else if (count < min_count) {
+ s->bl_tree[curlen].Freq += count;
+ } else if (curlen != 0) {
+ if (curlen != prevlen) s->bl_tree[curlen].Freq++;
+ s->bl_tree[REP_3_6].Freq++;
+ } else if (count <= 10) {
+ s->bl_tree[REPZ_3_10].Freq++;
+ } else {
+ s->bl_tree[REPZ_11_138].Freq++;
+ }
+ count = 0; prevlen = curlen;
+ if (nextlen == 0) {
+ max_count = 138, min_count = 3;
+ } else if (curlen == nextlen) {
+ max_count = 6, min_count = 3;
+ } else {
+ max_count = 7, min_count = 4;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Send a literal or distance tree in compressed form, using the codes in
+ * bl_tree.
+ */
+local void send_tree (s, tree, max_code)
+ deflate_state *s;
+ ct_data *tree; /* the tree to be scanned */
+ int max_code; /* and its largest code of non zero frequency */
+{
+ int n; /* iterates over all tree elements */
+ int prevlen = -1; /* last emitted length */
+ int curlen; /* length of current code */
+ int nextlen = tree[0].Len; /* length of next code */
+ int count = 0; /* repeat count of the current code */
+ int max_count = 7; /* max repeat count */
+ int min_count = 4; /* min repeat count */
+
+ /* tree[max_code+1].Len = -1; */ /* guard already set */
+ if (nextlen == 0) max_count = 138, min_count = 3;
+
+ for (n = 0; n <= max_code; n++) {
+ curlen = nextlen; nextlen = tree[n+1].Len;
+ if (++count < max_count && curlen == nextlen) {
+ continue;
+ } else if (count < min_count) {
+ do { send_code(s, curlen, s->bl_tree); } while (--count != 0);
+
+ } else if (curlen != 0) {
+ if (curlen != prevlen) {
+ send_code(s, curlen, s->bl_tree); count--;
+ }
+ Assert(count >= 3 && count <= 6, " 3_6?");
+ send_code(s, REP_3_6, s->bl_tree); send_bits(s, count-3, 2);
+
+ } else if (count <= 10) {
+ send_code(s, REPZ_3_10, s->bl_tree); send_bits(s, count-3, 3);
+
+ } else {
+ send_code(s, REPZ_11_138, s->bl_tree); send_bits(s, count-11, 7);
+ }
+ count = 0; prevlen = curlen;
+ if (nextlen == 0) {
+ max_count = 138, min_count = 3;
+ } else if (curlen == nextlen) {
+ max_count = 6, min_count = 3;
+ } else {
+ max_count = 7, min_count = 4;
+ }
+ }
+}
+
+/* ===========================================================================
+ * Construct the Huffman tree for the bit lengths and return the index in
+ * bl_order of the last bit length code to send.
+ */
+local int build_bl_tree(s)
+ deflate_state *s;
+{
+ int max_blindex; /* index of last bit length code of non zero freq */
+
+ /* Determine the bit length frequencies for literal and distance trees */
+ scan_tree(s, (ct_data *)s->dyn_ltree, s->l_desc.max_code);
+ scan_tree(s, (ct_data *)s->dyn_dtree, s->d_desc.max_code);
+
+ /* Build the bit length tree: */
+ build_tree(s, (tree_desc *)(&(s->bl_desc)));
+ /* opt_len now includes the length of the tree representations, except
+ * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
+ */
+
+ /* Determine the number of bit length codes to send. The pkzip format
+ * requires that at least 4 bit length codes be sent. (appnote.txt says
+ * 3 but the actual value used is 4.)
+ */
+ for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {
+ if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
+ }
+ /* Update opt_len to include the bit length tree and counts */
+ s->opt_len += 3*(max_blindex+1) + 5+5+4;
+ Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
+ s->opt_len, s->static_len));
+
+ return max_blindex;
+}
+
+/* ===========================================================================
+ * Send the header for a block using dynamic Huffman trees: the counts, the
+ * lengths of the bit length codes, the literal tree and the distance tree.
+ * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
+ */
+local void send_all_trees(s, lcodes, dcodes, blcodes)
+ deflate_state *s;
+ int lcodes, dcodes, blcodes; /* number of codes for each tree */
+{
+ int rank; /* index in bl_order */
+
+ Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
+ Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
+ "too many codes");
+ Tracev((stderr, "\nbl counts: "));
+ send_bits(s, lcodes-257, 5); /* not +255 as stated in appnote.txt */
+ send_bits(s, dcodes-1, 5);
+ send_bits(s, blcodes-4, 4); /* not -3 as stated in appnote.txt */
+ for (rank = 0; rank < blcodes; rank++) {
+ Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
+ send_bits(s, s->bl_tree[bl_order[rank]].Len, 3);
+ }
+ Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));
+
+ send_tree(s, (ct_data *)s->dyn_ltree, lcodes-1); /* literal tree */
+ Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));
+
+ send_tree(s, (ct_data *)s->dyn_dtree, dcodes-1); /* distance tree */
+ Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
+}
+
+/* ===========================================================================
+ * Send a stored block
+ */
+void _tr_stored_block(s, buf, stored_len, eof)
+ deflate_state *s;
+ charf *buf; /* input block */
+ ulg stored_len; /* length of input block */
+ int eof; /* true if this is the last block for a file */
+{
+ send_bits(s, (STORED_BLOCK<<1)+eof, 3); /* send block type */
+#ifdef DEBUG
+ s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
+ s->compressed_len += (stored_len + 4) << 3;
+#endif
+ copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
+}
+
+/* ===========================================================================
+ * Send one empty static block to give enough lookahead for inflate.
+ * This takes 10 bits, of which 7 may remain in the bit buffer.
+ * The current inflate code requires 9 bits of lookahead. If the
+ * last two codes for the previous block (real code plus EOB) were coded
+ * on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
+ * the last real code. In this case we send two empty static blocks instead
+ * of one. (There are no problems if the previous block is stored or fixed.)
+ * To simplify the code, we assume the worst case of last real code encoded
+ * on one bit only.
+ */
+void _tr_align(s)
+ deflate_state *s;
+{
+ send_bits(s, STATIC_TREES<<1, 3);
+ send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
+ s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
+#endif
+ bi_flush(s);
+ /* Of the 10 bits for the empty block, we have already sent
+ * (10 - bi_valid) bits. The lookahead for the last real code (before
+ * the EOB of the previous block) was thus at least one plus the length
+ * of the EOB plus what we have just sent of the empty static block.
+ */
+ if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
+ send_bits(s, STATIC_TREES<<1, 3);
+ send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
+ s->compressed_len += 10L;
+#endif
+ bi_flush(s);
+ }
+ s->last_eob_len = 7;
+}
+
+/* ===========================================================================
+ * Determine the best encoding for the current block: dynamic trees, static
+ * trees or store, and output the encoded block to the zip file.
+ */
+void _tr_flush_block(s, buf, stored_len, eof)
+ deflate_state *s;
+ charf *buf; /* input block, or NULL if too old */
+ ulg stored_len; /* length of input block */
+ int eof; /* true if this is the last block for a file */
+{
+ ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
+ int max_blindex = 0; /* index of last bit length code of non zero freq */
+
+ /* Build the Huffman trees unless a stored block is forced */
+ if (s->level > 0) {
+
+ /* Check if the file is binary or text */
+ if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN)
+ set_data_type(s);
+
+ /* Construct the literal and distance trees */
+ build_tree(s, (tree_desc *)(&(s->l_desc)));
+ Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
+ s->static_len));
+
+ build_tree(s, (tree_desc *)(&(s->d_desc)));
+ Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
+ s->static_len));
+ /* At this point, opt_len and static_len are the total bit lengths of
+ * the compressed block data, excluding the tree representations.
+ */
+
+ /* Build the bit length tree for the above two trees, and get the index
+ * in bl_order of the last bit length code to send.
+ */
+ max_blindex = build_bl_tree(s);
+
+ /* Determine the best encoding. Compute the block lengths in bytes. */
+ opt_lenb = (s->opt_len+3+7)>>3;
+ static_lenb = (s->static_len+3+7)>>3;
+
+ Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
+ opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
+ s->last_lit));
+
+ if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
+
+ } else {
+ Assert(buf != (char*)0, "lost buf");
+ opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
+ }
+
+#ifdef FORCE_STORED
+ if (buf != (char*)0) { /* force stored block */
+#else
+ if (stored_len+4 <= opt_lenb && buf != (char*)0) {
+ /* 4: two words for the lengths */
+#endif
+ /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
+ * Otherwise we can't have processed more than WSIZE input bytes since
+ * the last block flush, because compression would have been
+ * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
+ * transform a block into a stored block.
+ */
+ _tr_stored_block(s, buf, stored_len, eof);
+
+#ifdef FORCE_STATIC
+ } else if (static_lenb >= 0) { /* force static trees */
+#else
+ } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) {
+#endif
+ send_bits(s, (STATIC_TREES<<1)+eof, 3);
+ compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
+#ifdef DEBUG
+ s->compressed_len += 3 + s->static_len;
+#endif
+ } else {
+ send_bits(s, (DYN_TREES<<1)+eof, 3);
+ send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
+ max_blindex+1);
+ compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
+#ifdef DEBUG
+ s->compressed_len += 3 + s->opt_len;
+#endif
+ }
+ Assert (s->compressed_len == s->bits_sent, "bad compressed size");
+ /* The above check is made mod 2^32, for files larger than 512 MB
+ * and uLong implemented on 32 bits.
+ */
+ init_block(s);
+
+ if (eof) {
+ bi_windup(s);
+#ifdef DEBUG
+ s->compressed_len += 7; /* align on byte boundary */
+#endif
+ }
+ Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
+ s->compressed_len-7*eof));
+}
+
+/* ===========================================================================
+ * Save the match info and tally the frequency counts. Return true if
+ * the current block must be flushed.
+ */
+int _tr_tally (s, dist, lc)
+ deflate_state *s;
+ unsigned dist; /* distance of matched string */
+ unsigned lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */
+{
+ s->d_buf[s->last_lit] = (ush)dist;
+ s->l_buf[s->last_lit++] = (uch)lc;
+ if (dist == 0) {
+ /* lc is the unmatched char */
+ s->dyn_ltree[lc].Freq++;
+ } else {
+ s->matches++;
+ /* Here, lc is the match length - MIN_MATCH */
+ dist--; /* dist = match distance - 1 */
+ Assert((ush)dist < (ush)MAX_DIST(s) &&
+ (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
+ (ush)d_code(dist) < (ush)D_CODES, "_tr_tally: bad match");
+
+ s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
+ s->dyn_dtree[d_code(dist)].Freq++;
+ }
+
+#ifdef TRUNCATE_BLOCK
+ /* Try to guess if it is profitable to stop the current block here */
+ if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
+ /* Compute an upper bound for the compressed length */
+ ulg out_length = (ulg)s->last_lit*8L;
+ ulg in_length = (ulg)((long)s->strstart - s->block_start);
+ int dcode;
+ for (dcode = 0; dcode < D_CODES; dcode++) {
+ out_length += (ulg)s->dyn_dtree[dcode].Freq *
+ (5L+extra_dbits[dcode]);
+ }
+ out_length >>= 3;
+ Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
+ s->last_lit, in_length, out_length,
+ 100L - out_length*100L/in_length));
+ if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
+ }
+#endif
+ return (s->last_lit == s->lit_bufsize-1);
+ /* We avoid equality with lit_bufsize because of wraparound at 64K
+ * on 16 bit machines and because stored blocks are restricted to
+ * 64K-1 bytes.
+ */
+}
+
+/* ===========================================================================
+ * Send the block data compressed using the given Huffman trees
+ */
+local void compress_block(s, ltree, dtree)
+ deflate_state *s;
+ ct_data *ltree; /* literal tree */
+ ct_data *dtree; /* distance tree */
+{
+ unsigned dist; /* distance of matched string */
+ int lc; /* match length or unmatched char (if dist == 0) */
+ unsigned lx = 0; /* running index in l_buf */
+ unsigned code; /* the code to send */
+ int extra; /* number of extra bits to send */
+
+ if (s->last_lit != 0) do {
+ dist = s->d_buf[lx];
+ lc = s->l_buf[lx++];
+ if (dist == 0) {
+ send_code(s, lc, ltree); /* send a literal byte */
+ Tracecv(isgraph(lc), (stderr," '%c' ", lc));
+ } else {
+ /* Here, lc is the match length - MIN_MATCH */
+ code = _length_code[lc];
+ send_code(s, code+LITERALS+1, ltree); /* send the length code */
+ extra = extra_lbits[code];
+ if (extra != 0) {
+ lc -= base_length[code];
+ send_bits(s, lc, extra); /* send the extra length bits */
+ }
+ dist--; /* dist is now the match distance - 1 */
+ code = d_code(dist);
+ Assert (code < D_CODES, "bad d_code");
+
+ send_code(s, code, dtree); /* send the distance code */
+ extra = extra_dbits[code];
+ if (extra != 0) {
+ dist -= base_dist[code];
+ send_bits(s, dist, extra); /* send the extra distance bits */
+ }
+ } /* literal or match pair ? */
+
+ /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
+ Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
+ "pendingBuf overflow");
+
+ } while (lx < s->last_lit);
+
+ send_code(s, END_BLOCK, ltree);
+ s->last_eob_len = ltree[END_BLOCK].Len;
+}
+
+/* ===========================================================================
+ * Set the data type to BINARY or TEXT, using a crude approximation:
+ * set it to Z_TEXT if all symbols are either printable characters (33 to 255)
+ * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise.
+ * IN assertion: the fields Freq of dyn_ltree are set.
+ */
+local void set_data_type(s)
+ deflate_state *s;
+{
+ int n;
+
+ for (n = 0; n < 9; n++)
+ if (s->dyn_ltree[n].Freq != 0)
+ break;
+ if (n == 9)
+ for (n = 14; n < 32; n++)
+ if (s->dyn_ltree[n].Freq != 0)
+ break;
+ s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY;
+}
+
+/* ===========================================================================
+ * Reverse the first len bits of a code, using straightforward code (a faster
+ * method would use a table)
+ * IN assertion: 1 <= len <= 15
+ */
+local unsigned bi_reverse(code, len)
+ unsigned code; /* the value to invert */
+ int len; /* its bit length */
+{
+ register unsigned res = 0;
+ do {
+ res |= code & 1;
+ code >>= 1, res <<= 1;
+ } while (--len > 0);
+ return res >> 1;
+}
+
+/* ===========================================================================
+ * Flush the bit buffer, keeping at most 7 bits in it.
+ */
+local void bi_flush(s)
+ deflate_state *s;
+{
+ if (s->bi_valid == 16) {
+ put_short(s, s->bi_buf);
+ s->bi_buf = 0;
+ s->bi_valid = 0;
+ } else if (s->bi_valid >= 8) {
+ put_byte(s, (Byte)s->bi_buf);
+ s->bi_buf >>= 8;
+ s->bi_valid -= 8;
+ }
+}
+
+/* ===========================================================================
+ * Flush the bit buffer and align the output on a byte boundary
+ */
+local void bi_windup(s)
+ deflate_state *s;
+{
+ if (s->bi_valid > 8) {
+ put_short(s, s->bi_buf);
+ } else if (s->bi_valid > 0) {
+ put_byte(s, (Byte)s->bi_buf);
+ }
+ s->bi_buf = 0;
+ s->bi_valid = 0;
+#ifdef DEBUG
+ s->bits_sent = (s->bits_sent+7) & ~7;
+#endif
+}
+
+/* ===========================================================================
+ * Copy a stored block, storing first the length and its
+ * one's complement if requested.
+ */
+local void copy_block(s, buf, len, header)
+ deflate_state *s;
+ charf *buf; /* the input data */
+ unsigned len; /* its length */
+ int header; /* true if block header must be written */
+{
+ bi_windup(s); /* align on byte boundary */
+ s->last_eob_len = 8; /* enough lookahead for inflate */
+
+ if (header) {
+ put_short(s, (ush)len);
+ put_short(s, (ush)~len);
+#ifdef DEBUG
+ s->bits_sent += 2*16;
+#endif
+ }
+#ifdef DEBUG
+ s->bits_sent += (ulg)len<<3;
+#endif
+ while (len--) {
+ put_byte(s, *buf++);
+ }
+}
--- /dev/null
+/* header created automatically with -DGEN_TREES_H */
+
+local const ct_data static_ltree[L_CODES+2] = {
+{{ 12},{ 8}}, {{140},{ 8}}, {{ 76},{ 8}}, {{204},{ 8}}, {{ 44},{ 8}},
+{{172},{ 8}}, {{108},{ 8}}, {{236},{ 8}}, {{ 28},{ 8}}, {{156},{ 8}},
+{{ 92},{ 8}}, {{220},{ 8}}, {{ 60},{ 8}}, {{188},{ 8}}, {{124},{ 8}},
+{{252},{ 8}}, {{ 2},{ 8}}, {{130},{ 8}}, {{ 66},{ 8}}, {{194},{ 8}},
+{{ 34},{ 8}}, {{162},{ 8}}, {{ 98},{ 8}}, {{226},{ 8}}, {{ 18},{ 8}},
+{{146},{ 8}}, {{ 82},{ 8}}, {{210},{ 8}}, {{ 50},{ 8}}, {{178},{ 8}},
+{{114},{ 8}}, {{242},{ 8}}, {{ 10},{ 8}}, {{138},{ 8}}, {{ 74},{ 8}},
+{{202},{ 8}}, {{ 42},{ 8}}, {{170},{ 8}}, {{106},{ 8}}, {{234},{ 8}},
+{{ 26},{ 8}}, {{154},{ 8}}, {{ 90},{ 8}}, {{218},{ 8}}, {{ 58},{ 8}},
+{{186},{ 8}}, {{122},{ 8}}, {{250},{ 8}}, {{ 6},{ 8}}, {{134},{ 8}},
+{{ 70},{ 8}}, {{198},{ 8}}, {{ 38},{ 8}}, {{166},{ 8}}, {{102},{ 8}},
+{{230},{ 8}}, {{ 22},{ 8}}, {{150},{ 8}}, {{ 86},{ 8}}, {{214},{ 8}},
+{{ 54},{ 8}}, {{182},{ 8}}, {{118},{ 8}}, {{246},{ 8}}, {{ 14},{ 8}},
+{{142},{ 8}}, {{ 78},{ 8}}, {{206},{ 8}}, {{ 46},{ 8}}, {{174},{ 8}},
+{{110},{ 8}}, {{238},{ 8}}, {{ 30},{ 8}}, {{158},{ 8}}, {{ 94},{ 8}},
+{{222},{ 8}}, {{ 62},{ 8}}, {{190},{ 8}}, {{126},{ 8}}, {{254},{ 8}},
+{{ 1},{ 8}}, {{129},{ 8}}, {{ 65},{ 8}}, {{193},{ 8}}, {{ 33},{ 8}},
+{{161},{ 8}}, {{ 97},{ 8}}, {{225},{ 8}}, {{ 17},{ 8}}, {{145},{ 8}},
+{{ 81},{ 8}}, {{209},{ 8}}, {{ 49},{ 8}}, {{177},{ 8}}, {{113},{ 8}},
+{{241},{ 8}}, {{ 9},{ 8}}, {{137},{ 8}}, {{ 73},{ 8}}, {{201},{ 8}},
+{{ 41},{ 8}}, {{169},{ 8}}, {{105},{ 8}}, {{233},{ 8}}, {{ 25},{ 8}},
+{{153},{ 8}}, {{ 89},{ 8}}, {{217},{ 8}}, {{ 57},{ 8}}, {{185},{ 8}},
+{{121},{ 8}}, {{249},{ 8}}, {{ 5},{ 8}}, {{133},{ 8}}, {{ 69},{ 8}},
+{{197},{ 8}}, {{ 37},{ 8}}, {{165},{ 8}}, {{101},{ 8}}, {{229},{ 8}},
+{{ 21},{ 8}}, {{149},{ 8}}, {{ 85},{ 8}}, {{213},{ 8}}, {{ 53},{ 8}},
+{{181},{ 8}}, {{117},{ 8}}, {{245},{ 8}}, {{ 13},{ 8}}, {{141},{ 8}},
+{{ 77},{ 8}}, {{205},{ 8}}, {{ 45},{ 8}}, {{173},{ 8}}, {{109},{ 8}},
+{{237},{ 8}}, {{ 29},{ 8}}, {{157},{ 8}}, {{ 93},{ 8}}, {{221},{ 8}},
+{{ 61},{ 8}}, {{189},{ 8}}, {{125},{ 8}}, {{253},{ 8}}, {{ 19},{ 9}},
+{{275},{ 9}}, {{147},{ 9}}, {{403},{ 9}}, {{ 83},{ 9}}, {{339},{ 9}},
+{{211},{ 9}}, {{467},{ 9}}, {{ 51},{ 9}}, {{307},{ 9}}, {{179},{ 9}},
+{{435},{ 9}}, {{115},{ 9}}, {{371},{ 9}}, {{243},{ 9}}, {{499},{ 9}},
+{{ 11},{ 9}}, {{267},{ 9}}, {{139},{ 9}}, {{395},{ 9}}, {{ 75},{ 9}},
+{{331},{ 9}}, {{203},{ 9}}, {{459},{ 9}}, {{ 43},{ 9}}, {{299},{ 9}},
+{{171},{ 9}}, {{427},{ 9}}, {{107},{ 9}}, {{363},{ 9}}, {{235},{ 9}},
+{{491},{ 9}}, {{ 27},{ 9}}, {{283},{ 9}}, {{155},{ 9}}, {{411},{ 9}},
+{{ 91},{ 9}}, {{347},{ 9}}, {{219},{ 9}}, {{475},{ 9}}, {{ 59},{ 9}},
+{{315},{ 9}}, {{187},{ 9}}, {{443},{ 9}}, {{123},{ 9}}, {{379},{ 9}},
+{{251},{ 9}}, {{507},{ 9}}, {{ 7},{ 9}}, {{263},{ 9}}, {{135},{ 9}},
+{{391},{ 9}}, {{ 71},{ 9}}, {{327},{ 9}}, {{199},{ 9}}, {{455},{ 9}},
+{{ 39},{ 9}}, {{295},{ 9}}, {{167},{ 9}}, {{423},{ 9}}, {{103},{ 9}},
+{{359},{ 9}}, {{231},{ 9}}, {{487},{ 9}}, {{ 23},{ 9}}, {{279},{ 9}},
+{{151},{ 9}}, {{407},{ 9}}, {{ 87},{ 9}}, {{343},{ 9}}, {{215},{ 9}},
+{{471},{ 9}}, {{ 55},{ 9}}, {{311},{ 9}}, {{183},{ 9}}, {{439},{ 9}},
+{{119},{ 9}}, {{375},{ 9}}, {{247},{ 9}}, {{503},{ 9}}, {{ 15},{ 9}},
+{{271},{ 9}}, {{143},{ 9}}, {{399},{ 9}}, {{ 79},{ 9}}, {{335},{ 9}},
+{{207},{ 9}}, {{463},{ 9}}, {{ 47},{ 9}}, {{303},{ 9}}, {{175},{ 9}},
+{{431},{ 9}}, {{111},{ 9}}, {{367},{ 9}}, {{239},{ 9}}, {{495},{ 9}},
+{{ 31},{ 9}}, {{287},{ 9}}, {{159},{ 9}}, {{415},{ 9}}, {{ 95},{ 9}},
+{{351},{ 9}}, {{223},{ 9}}, {{479},{ 9}}, {{ 63},{ 9}}, {{319},{ 9}},
+{{191},{ 9}}, {{447},{ 9}}, {{127},{ 9}}, {{383},{ 9}}, {{255},{ 9}},
+{{511},{ 9}}, {{ 0},{ 7}}, {{ 64},{ 7}}, {{ 32},{ 7}}, {{ 96},{ 7}},
+{{ 16},{ 7}}, {{ 80},{ 7}}, {{ 48},{ 7}}, {{112},{ 7}}, {{ 8},{ 7}},
+{{ 72},{ 7}}, {{ 40},{ 7}}, {{104},{ 7}}, {{ 24},{ 7}}, {{ 88},{ 7}},
+{{ 56},{ 7}}, {{120},{ 7}}, {{ 4},{ 7}}, {{ 68},{ 7}}, {{ 36},{ 7}},
+{{100},{ 7}}, {{ 20},{ 7}}, {{ 84},{ 7}}, {{ 52},{ 7}}, {{116},{ 7}},
+{{ 3},{ 8}}, {{131},{ 8}}, {{ 67},{ 8}}, {{195},{ 8}}, {{ 35},{ 8}},
+{{163},{ 8}}, {{ 99},{ 8}}, {{227},{ 8}}
+};
+
+local const ct_data static_dtree[D_CODES] = {
+{{ 0},{ 5}}, {{16},{ 5}}, {{ 8},{ 5}}, {{24},{ 5}}, {{ 4},{ 5}},
+{{20},{ 5}}, {{12},{ 5}}, {{28},{ 5}}, {{ 2},{ 5}}, {{18},{ 5}},
+{{10},{ 5}}, {{26},{ 5}}, {{ 6},{ 5}}, {{22},{ 5}}, {{14},{ 5}},
+{{30},{ 5}}, {{ 1},{ 5}}, {{17},{ 5}}, {{ 9},{ 5}}, {{25},{ 5}},
+{{ 5},{ 5}}, {{21},{ 5}}, {{13},{ 5}}, {{29},{ 5}}, {{ 3},{ 5}},
+{{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}}
+};
+
+const uch _dist_code[DIST_CODE_LEN] = {
+ 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8,
+ 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10,
+10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13,
+13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 0, 0, 16, 17,
+18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22,
+23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29
+};
+
+const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 12,
+13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
+17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
+19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22,
+22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
+23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28
+};
+
+local const int base_length[LENGTH_CODES] = {
+0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
+64, 80, 96, 112, 128, 160, 192, 224, 0
+};
+
+local const int base_dist[D_CODES] = {
+ 0, 1, 2, 3, 4, 6, 8, 12, 16, 24,
+ 32, 48, 64, 96, 128, 192, 256, 384, 512, 768,
+ 1024, 1536, 2048, 3072, 4096, 6144, 8192, 12288, 16384, 24576
+};
+
--- /dev/null
+/* uncompr.c -- decompress a memory buffer
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+/* ===========================================================================
+ Decompresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be large enough to hold the
+ entire uncompressed data. (The size of the uncompressed data must have
+ been saved previously by the compressor and transmitted to the decompressor
+ by some mechanism outside the scope of this compression library.)
+ Upon exit, destLen is the actual size of the compressed buffer.
+ This function can be used to decompress a whole file at once if the
+ input file is mmap'ed.
+
+ uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_BUF_ERROR if there was not enough room in the output
+ buffer, or Z_DATA_ERROR if the input data was corrupted.
+*/
+int ZEXPORT uncompress (dest, destLen, source, sourceLen)
+ Bytef *dest;
+ uLongf *destLen;
+ const Bytef *source;
+ uLong sourceLen;
+{
+ z_stream stream;
+ int err;
+
+ stream.next_in = (Bytef*)source;
+ stream.avail_in = (uInt)sourceLen;
+ /* Check for source > 64K on 16-bit machine: */
+ if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
+
+ stream.next_out = dest;
+ stream.avail_out = (uInt)*destLen;
+ if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+
+ stream.zalloc = (alloc_func)0;
+ stream.zfree = (free_func)0;
+
+ err = inflateInit(&stream);
+ if (err != Z_OK) return err;
+
+ err = inflate(&stream, Z_FINISH);
+ if (err != Z_STREAM_END) {
+ inflateEnd(&stream);
+ if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
+ return Z_DATA_ERROR;
+ return err;
+ }
+ *destLen = stream.total_out;
+
+ err = inflateEnd(&stream);
+ return err;
+}
--- /dev/null
+/* zconf.h -- configuration of the zlib compression library
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#ifndef ZCONF_H
+#define ZCONF_H
+
+/*
+ * If you *really* need a unique prefix for all types and library functions,
+ * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
+ */
+#ifdef Z_PREFIX
+# define deflateInit_ z_deflateInit_
+# define deflate z_deflate
+# define deflateEnd z_deflateEnd
+# define inflateInit_ z_inflateInit_
+# define inflate z_inflate
+# define inflateEnd z_inflateEnd
+# define deflateInit2_ z_deflateInit2_
+# define deflateSetDictionary z_deflateSetDictionary
+# define deflateCopy z_deflateCopy
+# define deflateReset z_deflateReset
+# define deflateParams z_deflateParams
+# define deflateBound z_deflateBound
+# define deflatePrime z_deflatePrime
+# define inflateInit2_ z_inflateInit2_
+# define inflateSetDictionary z_inflateSetDictionary
+# define inflateSync z_inflateSync
+# define inflateSyncPoint z_inflateSyncPoint
+# define inflateCopy z_inflateCopy
+# define inflateReset z_inflateReset
+# define inflateBack z_inflateBack
+# define inflateBackEnd z_inflateBackEnd
+# define compress z_compress
+# define compress2 z_compress2
+# define compressBound z_compressBound
+# define uncompress z_uncompress
+# define adler32 z_adler32
+# define crc32 z_crc32
+# define get_crc_table z_get_crc_table
+# define zError z_zError
+
+# define alloc_func z_alloc_func
+# define free_func z_free_func
+# define in_func z_in_func
+# define out_func z_out_func
+# define Byte z_Byte
+# define uInt z_uInt
+# define uLong z_uLong
+# define Bytef z_Bytef
+# define charf z_charf
+# define intf z_intf
+# define uIntf z_uIntf
+# define uLongf z_uLongf
+# define voidpf z_voidpf
+# define voidp z_voidp
+#endif
+
+#if defined(__MSDOS__) && !defined(MSDOS)
+# define MSDOS
+#endif
+#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
+# define OS2
+#endif
+#if defined(_WINDOWS) && !defined(WINDOWS)
+# define WINDOWS
+#endif
+#if defined(_WIN32) || defined(_WIN32_WCE) || defined(__WIN32__)
+# ifndef WIN32
+# define WIN32
+# endif
+#endif
+#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
+# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
+# ifndef SYS16BIT
+# define SYS16BIT
+# endif
+# endif
+#endif
+
+/*
+ * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
+ * than 64k bytes at a time (needed on systems with 16-bit int).
+ */
+#ifdef SYS16BIT
+# define MAXSEG_64K
+#endif
+#ifdef MSDOS
+# define UNALIGNED_OK
+#endif
+
+#ifdef __STDC_VERSION__
+# ifndef STDC
+# define STDC
+# endif
+# if __STDC_VERSION__ >= 199901L
+# ifndef STDC99
+# define STDC99
+# endif
+# endif
+#endif
+#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
+# define STDC
+#endif
+
+#if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */
+# define STDC
+#endif
+
+#ifndef STDC
+# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
+# define const /* note: need a more gentle solution here */
+# endif
+#endif
+
+/* Some Mac compilers merge all .h files incorrectly: */
+#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
+# define NO_DUMMY_DECL
+#endif
+
+/* Maximum value for memLevel in deflateInit2 */
+#ifndef MAX_MEM_LEVEL
+# ifdef MAXSEG_64K
+# define MAX_MEM_LEVEL 8
+# else
+# define MAX_MEM_LEVEL 9
+# endif
+#endif
+
+/* Maximum value for windowBits in deflateInit2 and inflateInit2.
+ * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
+ * created by gzip. (Files created by minigzip can still be extracted by
+ * gzip.)
+ */
+#ifndef MAX_WBITS
+# define MAX_WBITS 15 /* 32K LZ77 window */
+#endif
+
+/* The memory requirements for deflate are (in bytes):
+ (1 << (windowBits+2)) + (1 << (memLevel+9))
+ that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
+ plus a few kilobytes for small objects. For example, if you want to reduce
+ the default memory requirements from 256K to 128K, compile with
+ make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
+ Of course this will generally degrade compression (there's no free lunch).
+
+ The memory requirements for inflate are (in bytes) 1 << windowBits
+ that is, 32K for windowBits=15 (default value) plus a few kilobytes
+ for small objects.
+*/
+
+ /* Type declarations */
+
+#ifndef OF /* function prototypes */
+# ifdef STDC
+# define OF(args) args
+# else
+# define OF(args) ()
+# endif
+#endif
+
+/* The following definitions for FAR are needed only for MSDOS mixed
+ * model programming (small or medium model with some far allocations).
+ * This was tested only with MSC; for other MSDOS compilers you may have
+ * to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
+ * just define FAR to be empty.
+ */
+#ifdef SYS16BIT
+# if defined(M_I86SM) || defined(M_I86MM)
+ /* MSC small or medium model */
+# define SMALL_MEDIUM
+# ifdef _MSC_VER
+# define FAR _far
+# else
+# define FAR far
+# endif
+# endif
+# if (defined(__SMALL__) || defined(__MEDIUM__))
+ /* Turbo C small or medium model */
+# define SMALL_MEDIUM
+# ifdef __BORLANDC__
+# define FAR _far
+# else
+# define FAR far
+# endif
+# endif
+#endif
+
+#if defined(WINDOWS) || defined(WIN32)
+ /* If building or using zlib as a DLL, define ZLIB_DLL.
+ * This is not mandatory, but it offers a little performance increase.
+ */
+# ifdef ZLIB_DLL
+# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
+# ifdef ZLIB_INTERNAL
+# define ZEXTERN extern __declspec(dllexport)
+# else
+# define ZEXTERN extern __declspec(dllimport)
+# endif
+# endif
+# endif /* ZLIB_DLL */
+ /* If building or using zlib with the WINAPI/WINAPIV calling convention,
+ * define ZLIB_WINAPI.
+ * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
+ */
+# ifdef ZLIB_WINAPI
+# ifdef FAR
+# undef FAR
+# endif
+# include <windows.h>
+ /* No need for _export, use ZLIB.DEF instead. */
+ /* For complete Windows compatibility, use WINAPI, not __stdcall. */
+# define ZEXPORT WINAPI
+# ifdef WIN32
+# define ZEXPORTVA WINAPIV
+# else
+# define ZEXPORTVA FAR CDECL
+# endif
+# endif
+#endif
+
+#if defined (__BEOS__)
+# ifdef ZLIB_DLL
+# ifdef ZLIB_INTERNAL
+# define ZEXPORT __declspec(dllexport)
+# define ZEXPORTVA __declspec(dllexport)
+# else
+# define ZEXPORT __declspec(dllimport)
+# define ZEXPORTVA __declspec(dllimport)
+# endif
+# endif
+#endif
+
+#ifndef ZEXTERN
+# define ZEXTERN extern
+#endif
+#ifndef ZEXPORT
+# define ZEXPORT
+#endif
+#ifndef ZEXPORTVA
+# define ZEXPORTVA
+#endif
+
+#ifndef FAR
+# define FAR
+#endif
+
+#if !defined(__MACTYPES__)
+typedef unsigned char Byte; /* 8 bits */
+#endif
+typedef unsigned int uInt; /* 16 bits or more */
+typedef unsigned long uLong; /* 32 bits or more */
+
+#ifdef SMALL_MEDIUM
+ /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
+# define Bytef Byte FAR
+#else
+ typedef Byte FAR Bytef;
+#endif
+typedef char FAR charf;
+typedef int FAR intf;
+typedef uInt FAR uIntf;
+typedef uLong FAR uLongf;
+
+#ifdef STDC
+ typedef void const *voidpc;
+ typedef void FAR *voidpf;
+ typedef void *voidp;
+#else
+ typedef Byte const *voidpc;
+ typedef Byte FAR *voidpf;
+ typedef Byte *voidp;
+#endif
+
+#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */
+# include <sys/types.h> /* for off_t */
+# include <unistd.h> /* for SEEK_* and off_t */
+# ifdef VMS
+# include <unixio.h> /* for off_t */
+# endif
+# define z_off_t off_t
+#endif
+#ifndef SEEK_SET
+# define SEEK_SET 0 /* Seek from beginning of file. */
+# define SEEK_CUR 1 /* Seek from current position. */
+# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
+#endif
+#ifndef z_off_t
+# define z_off_t long
+#endif
+
+#if defined(__OS400__)
+# define NO_vsnprintf
+#endif
+
+#if defined(__MVS__)
+# define NO_vsnprintf
+# ifdef FAR
+# undef FAR
+# endif
+#endif
+
+/* MVS linker does not support external names larger than 8 bytes */
+#if defined(__MVS__)
+# pragma map(deflateInit_,"DEIN")
+# pragma map(deflateInit2_,"DEIN2")
+# pragma map(deflateEnd,"DEEND")
+# pragma map(deflateBound,"DEBND")
+# pragma map(inflateInit_,"ININ")
+# pragma map(inflateInit2_,"ININ2")
+# pragma map(inflateEnd,"INEND")
+# pragma map(inflateSync,"INSY")
+# pragma map(inflateSetDictionary,"INSEDI")
+# pragma map(compressBound,"CMBND")
+# pragma map(inflate_table,"INTABL")
+# pragma map(inflate_fast,"INFA")
+# pragma map(inflate_copyright,"INCOPY")
+#endif
+
+#endif /* ZCONF_H */
--- /dev/null
+/* zlib.h -- interface of the 'zlib' general purpose compression library
+ version 1.2.3, July 18th, 2005
+
+ Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+ Jean-loup Gailly Mark Adler
+ jloup@gzip.org madler@alumni.caltech.edu
+
+
+ The data format used by the zlib library is described by RFCs (Request for
+ Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
+ (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
+*/
+
+#ifndef ZLIB_H
+#define ZLIB_H
+
+#include "zconf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ZLIB_VERSION "1.2.3"
+#define ZLIB_VERNUM 0x1230
+
+/*
+ The 'zlib' compression library provides in-memory compression and
+ decompression functions, including integrity checks of the uncompressed
+ data. This version of the library supports only one compression method
+ (deflation) but other algorithms will be added later and will have the same
+ stream interface.
+
+ Compression can be done in a single step if the buffers are large
+ enough (for example if an input file is mmap'ed), or can be done by
+ repeated calls of the compression function. In the latter case, the
+ application must provide more input and/or consume the output
+ (providing more output space) before each call.
+
+ The compressed data format used by default by the in-memory functions is
+ the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
+ around a deflate stream, which is itself documented in RFC 1951.
+
+ The library also supports reading and writing files in gzip (.gz) format
+ with an interface similar to that of stdio using the functions that start
+ with "gz". The gzip format is different from the zlib format. gzip is a
+ gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
+
+ This library can optionally read and write gzip streams in memory as well.
+
+ The zlib format was designed to be compact and fast for use in memory
+ and on communications channels. The gzip format was designed for single-
+ file compression on file systems, has a larger header than zlib to maintain
+ directory information, and uses a different, slower check method than zlib.
+
+ The library does not install any signal handler. The decoder checks
+ the consistency of the compressed data, so the library should never
+ crash even in case of corrupted input.
+*/
+
+typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
+typedef void (*free_func) OF((voidpf opaque, voidpf address));
+
+struct internal_state;
+
+typedef struct z_stream_s {
+ Bytef *next_in; /* next input byte */
+ uInt avail_in; /* number of bytes available at next_in */
+ uLong total_in; /* total nb of input bytes read so far */
+
+ Bytef *next_out; /* next output byte should be put there */
+ uInt avail_out; /* remaining free space at next_out */
+ uLong total_out; /* total nb of bytes output so far */
+
+ char *msg; /* last error message, NULL if no error */
+ struct internal_state FAR *state; /* not visible by applications */
+
+ alloc_func zalloc; /* used to allocate the internal state */
+ free_func zfree; /* used to free the internal state */
+ voidpf opaque; /* private data object passed to zalloc and zfree */
+
+ int data_type; /* best guess about the data type: binary or text */
+ uLong adler; /* adler32 value of the uncompressed data */
+ uLong reserved; /* reserved for future use */
+} z_stream;
+
+typedef z_stream FAR *z_streamp;
+
+/*
+ gzip header information passed to and from zlib routines. See RFC 1952
+ for more details on the meanings of these fields.
+*/
+typedef struct gz_header_s {
+ int text; /* true if compressed data believed to be text */
+ uLong time; /* modification time */
+ int xflags; /* extra flags (not used when writing a gzip file) */
+ int os; /* operating system */
+ Bytef *extra; /* pointer to extra field or Z_NULL if none */
+ uInt extra_len; /* extra field length (valid if extra != Z_NULL) */
+ uInt extra_max; /* space at extra (only when reading header) */
+ Bytef *name; /* pointer to zero-terminated file name or Z_NULL */
+ uInt name_max; /* space at name (only when reading header) */
+ Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */
+ uInt comm_max; /* space at comment (only when reading header) */
+ int hcrc; /* true if there was or will be a header crc */
+ int done; /* true when done reading gzip header (not used
+ when writing a gzip file) */
+} gz_header;
+
+typedef gz_header FAR *gz_headerp;
+
+/*
+ The application must update next_in and avail_in when avail_in has
+ dropped to zero. It must update next_out and avail_out when avail_out
+ has dropped to zero. The application must initialize zalloc, zfree and
+ opaque before calling the init function. All other fields are set by the
+ compression library and must not be updated by the application.
+
+ The opaque value provided by the application will be passed as the first
+ parameter for calls of zalloc and zfree. This can be useful for custom
+ memory management. The compression library attaches no meaning to the
+ opaque value.
+
+ zalloc must return Z_NULL if there is not enough memory for the object.
+ If zlib is used in a multi-threaded application, zalloc and zfree must be
+ thread safe.
+
+ On 16-bit systems, the functions zalloc and zfree must be able to allocate
+ exactly 65536 bytes, but will not be required to allocate more than this
+ if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
+ pointers returned by zalloc for objects of exactly 65536 bytes *must*
+ have their offset normalized to zero. The default allocation function
+ provided by this library ensures this (see zutil.c). To reduce memory
+ requirements and avoid any allocation of 64K objects, at the expense of
+ compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
+
+ The fields total_in and total_out can be used for statistics or
+ progress reports. After compression, total_in holds the total size of
+ the uncompressed data and may be saved for use in the decompressor
+ (particularly if the decompressor wants to decompress everything in
+ a single step).
+*/
+
+ /* constants */
+
+#define Z_NO_FLUSH 0
+#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
+#define Z_SYNC_FLUSH 2
+#define Z_FULL_FLUSH 3
+#define Z_FINISH 4
+#define Z_BLOCK 5
+/* Allowed flush values; see deflate() and inflate() below for details */
+
+#define Z_OK 0
+#define Z_STREAM_END 1
+#define Z_NEED_DICT 2
+#define Z_ERRNO (-1)
+#define Z_STREAM_ERROR (-2)
+#define Z_DATA_ERROR (-3)
+#define Z_MEM_ERROR (-4)
+#define Z_BUF_ERROR (-5)
+#define Z_VERSION_ERROR (-6)
+/* Return codes for the compression/decompression functions. Negative
+ * values are errors, positive values are used for special but normal events.
+ */
+
+#define Z_NO_COMPRESSION 0
+#define Z_BEST_SPEED 1
+#define Z_BEST_COMPRESSION 9
+#define Z_DEFAULT_COMPRESSION (-1)
+/* compression levels */
+
+#define Z_FILTERED 1
+#define Z_HUFFMAN_ONLY 2
+#define Z_RLE 3
+#define Z_FIXED 4
+#define Z_DEFAULT_STRATEGY 0
+/* compression strategy; see deflateInit2() below for details */
+
+#define Z_BINARY 0
+#define Z_TEXT 1
+#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
+#define Z_UNKNOWN 2
+/* Possible values of the data_type field (though see inflate()) */
+
+#define Z_DEFLATED 8
+/* The deflate compression method (the only one supported in this version) */
+
+#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
+
+#define zlib_version zlibVersion()
+/* for compatibility with versions < 1.0.2 */
+
+ /* basic functions */
+
+ZEXTERN const char * ZEXPORT zlibVersion OF((void));
+/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
+ If the first character differs, the library code actually used is
+ not compatible with the zlib.h header file used by the application.
+ This check is automatically made by deflateInit and inflateInit.
+ */
+
+/*
+ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
+
+ Initializes the internal stream state for compression. The fields
+ zalloc, zfree and opaque must be initialized before by the caller.
+ If zalloc and zfree are set to Z_NULL, deflateInit updates them to
+ use default allocation functions.
+
+ The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
+ 1 gives best speed, 9 gives best compression, 0 gives no compression at
+ all (the input data is simply copied a block at a time).
+ Z_DEFAULT_COMPRESSION requests a default compromise between speed and
+ compression (currently equivalent to level 6).
+
+ deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_STREAM_ERROR if level is not a valid compression level,
+ Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
+ with the version assumed by the caller (ZLIB_VERSION).
+ msg is set to null if there is no error message. deflateInit does not
+ perform any compression: this will be done by deflate().
+*/
+
+
+ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
+/*
+ deflate compresses as much data as possible, and stops when the input
+ buffer becomes empty or the output buffer becomes full. It may introduce some
+ output latency (reading input without producing any output) except when
+ forced to flush.
+
+ The detailed semantics are as follows. deflate performs one or both of the
+ following actions:
+
+ - Compress more input starting at next_in and update next_in and avail_in
+ accordingly. If not all input can be processed (because there is not
+ enough room in the output buffer), next_in and avail_in are updated and
+ processing will resume at this point for the next call of deflate().
+
+ - Provide more output starting at next_out and update next_out and avail_out
+ accordingly. This action is forced if the parameter flush is non zero.
+ Forcing flush frequently degrades the compression ratio, so this parameter
+ should be set only when necessary (in interactive applications).
+ Some output may be provided even if flush is not set.
+
+ Before the call of deflate(), the application should ensure that at least
+ one of the actions is possible, by providing more input and/or consuming
+ more output, and updating avail_in or avail_out accordingly; avail_out
+ should never be zero before the call. The application can consume the
+ compressed output when it wants, for example when the output buffer is full
+ (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
+ and with zero avail_out, it must be called again after making room in the
+ output buffer because there might be more output pending.
+
+ Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
+ decide how much data to accumualte before producing output, in order to
+ maximize compression.
+
+ If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
+ flushed to the output buffer and the output is aligned on a byte boundary, so
+ that the decompressor can get all input data available so far. (In particular
+ avail_in is zero after the call if enough output space has been provided
+ before the call.) Flushing may degrade compression for some compression
+ algorithms and so it should be used only when necessary.
+
+ If flush is set to Z_FULL_FLUSH, all output is flushed as with
+ Z_SYNC_FLUSH, and the compression state is reset so that decompression can
+ restart from this point if previous compressed data has been damaged or if
+ random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
+ compression.
+
+ If deflate returns with avail_out == 0, this function must be called again
+ with the same value of the flush parameter and more output space (updated
+ avail_out), until the flush is complete (deflate returns with non-zero
+ avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
+ avail_out is greater than six to avoid repeated flush markers due to
+ avail_out == 0 on return.
+
+ If the parameter flush is set to Z_FINISH, pending input is processed,
+ pending output is flushed and deflate returns with Z_STREAM_END if there
+ was enough output space; if deflate returns with Z_OK, this function must be
+ called again with Z_FINISH and more output space (updated avail_out) but no
+ more input data, until it returns with Z_STREAM_END or an error. After
+ deflate has returned Z_STREAM_END, the only possible operations on the
+ stream are deflateReset or deflateEnd.
+
+ Z_FINISH can be used immediately after deflateInit if all the compression
+ is to be done in a single step. In this case, avail_out must be at least
+ the value returned by deflateBound (see below). If deflate does not return
+ Z_STREAM_END, then it must be called again as described above.
+
+ deflate() sets strm->adler to the adler32 checksum of all input read
+ so far (that is, total_in bytes).
+
+ deflate() may update strm->data_type if it can make a good guess about
+ the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
+ binary. This field is only for information purposes and does not affect
+ the compression algorithm in any manner.
+
+ deflate() returns Z_OK if some progress has been made (more input
+ processed or more output produced), Z_STREAM_END if all input has been
+ consumed and all output has been produced (only when flush is set to
+ Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
+ if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
+ (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
+ fatal, and deflate() can be called again with more input and more output
+ space to continue compressing.
+*/
+
+
+ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
+/*
+ All dynamically allocated data structures for this stream are freed.
+ This function discards any unprocessed input and does not flush any
+ pending output.
+
+ deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
+ stream state was inconsistent, Z_DATA_ERROR if the stream was freed
+ prematurely (some input or output was discarded). In the error case,
+ msg may be set but then points to a static string (which must not be
+ deallocated).
+*/
+
+
+/*
+ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
+
+ Initializes the internal stream state for decompression. The fields
+ next_in, avail_in, zalloc, zfree and opaque must be initialized before by
+ the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
+ value depends on the compression method), inflateInit determines the
+ compression method from the zlib header and allocates all data structures
+ accordingly; otherwise the allocation will be deferred to the first call of
+ inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
+ use default allocation functions.
+
+ inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
+ version assumed by the caller. msg is set to null if there is no error
+ message. inflateInit does not perform any decompression apart from reading
+ the zlib header if present: this will be done by inflate(). (So next_in and
+ avail_in may be modified, but next_out and avail_out are unchanged.)
+*/
+
+
+ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
+/*
+ inflate decompresses as much data as possible, and stops when the input
+ buffer becomes empty or the output buffer becomes full. It may introduce
+ some output latency (reading input without producing any output) except when
+ forced to flush.
+
+ The detailed semantics are as follows. inflate performs one or both of the
+ following actions:
+
+ - Decompress more input starting at next_in and update next_in and avail_in
+ accordingly. If not all input can be processed (because there is not
+ enough room in the output buffer), next_in is updated and processing
+ will resume at this point for the next call of inflate().
+
+ - Provide more output starting at next_out and update next_out and avail_out
+ accordingly. inflate() provides as much output as possible, until there
+ is no more input data or no more space in the output buffer (see below
+ about the flush parameter).
+
+ Before the call of inflate(), the application should ensure that at least
+ one of the actions is possible, by providing more input and/or consuming
+ more output, and updating the next_* and avail_* values accordingly.
+ The application can consume the uncompressed output when it wants, for
+ example when the output buffer is full (avail_out == 0), or after each
+ call of inflate(). If inflate returns Z_OK and with zero avail_out, it
+ must be called again after making room in the output buffer because there
+ might be more output pending.
+
+ The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
+ Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
+ output as possible to the output buffer. Z_BLOCK requests that inflate() stop
+ if and when it gets to the next deflate block boundary. When decoding the
+ zlib or gzip format, this will cause inflate() to return immediately after
+ the header and before the first block. When doing a raw inflate, inflate()
+ will go ahead and process the first block, and will return when it gets to
+ the end of that block, or when it runs out of data.
+
+ The Z_BLOCK option assists in appending to or combining deflate streams.
+ Also to assist in this, on return inflate() will set strm->data_type to the
+ number of unused bits in the last byte taken from strm->next_in, plus 64
+ if inflate() is currently decoding the last block in the deflate stream,
+ plus 128 if inflate() returned immediately after decoding an end-of-block
+ code or decoding the complete header up to just before the first byte of the
+ deflate stream. The end-of-block will not be indicated until all of the
+ uncompressed data from that block has been written to strm->next_out. The
+ number of unused bits may in general be greater than seven, except when
+ bit 7 of data_type is set, in which case the number of unused bits will be
+ less than eight.
+
+ inflate() should normally be called until it returns Z_STREAM_END or an
+ error. However if all decompression is to be performed in a single step
+ (a single call of inflate), the parameter flush should be set to
+ Z_FINISH. In this case all pending input is processed and all pending
+ output is flushed; avail_out must be large enough to hold all the
+ uncompressed data. (The size of the uncompressed data may have been saved
+ by the compressor for this purpose.) The next operation on this stream must
+ be inflateEnd to deallocate the decompression state. The use of Z_FINISH
+ is never required, but can be used to inform inflate that a faster approach
+ may be used for the single inflate() call.
+
+ In this implementation, inflate() always flushes as much output as
+ possible to the output buffer, and always uses the faster approach on the
+ first call. So the only effect of the flush parameter in this implementation
+ is on the return value of inflate(), as noted below, or when it returns early
+ because Z_BLOCK is used.
+
+ If a preset dictionary is needed after this call (see inflateSetDictionary
+ below), inflate sets strm->adler to the adler32 checksum of the dictionary
+ chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
+ strm->adler to the adler32 checksum of all output produced so far (that is,
+ total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
+ below. At the end of the stream, inflate() checks that its computed adler32
+ checksum is equal to that saved by the compressor and returns Z_STREAM_END
+ only if the checksum is correct.
+
+ inflate() will decompress and check either zlib-wrapped or gzip-wrapped
+ deflate data. The header type is detected automatically. Any information
+ contained in the gzip header is not retained, so applications that need that
+ information should instead use raw inflate, see inflateInit2() below, or
+ inflateBack() and perform their own processing of the gzip header and
+ trailer.
+
+ inflate() returns Z_OK if some progress has been made (more input processed
+ or more output produced), Z_STREAM_END if the end of the compressed data has
+ been reached and all uncompressed output has been produced, Z_NEED_DICT if a
+ preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
+ corrupted (input stream not conforming to the zlib format or incorrect check
+ value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
+ if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
+ Z_BUF_ERROR if no progress is possible or if there was not enough room in the
+ output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
+ inflate() can be called again with more input and more output space to
+ continue decompressing. If Z_DATA_ERROR is returned, the application may then
+ call inflateSync() to look for a good compression block if a partial recovery
+ of the data is desired.
+*/
+
+
+ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
+/*
+ All dynamically allocated data structures for this stream are freed.
+ This function discards any unprocessed input and does not flush any
+ pending output.
+
+ inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
+ was inconsistent. In the error case, msg may be set but then points to a
+ static string (which must not be deallocated).
+*/
+
+ /* Advanced functions */
+
+/*
+ The following functions are needed only in some special applications.
+*/
+
+/*
+ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
+ int level,
+ int method,
+ int windowBits,
+ int memLevel,
+ int strategy));
+
+ This is another version of deflateInit with more compression options. The
+ fields next_in, zalloc, zfree and opaque must be initialized before by
+ the caller.
+
+ The method parameter is the compression method. It must be Z_DEFLATED in
+ this version of the library.
+
+ The windowBits parameter is the base two logarithm of the window size
+ (the size of the history buffer). It should be in the range 8..15 for this
+ version of the library. Larger values of this parameter result in better
+ compression at the expense of memory usage. The default value is 15 if
+ deflateInit is used instead.
+
+ windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
+ determines the window size. deflate() will then generate raw deflate data
+ with no zlib header or trailer, and will not compute an adler32 check value.
+
+ windowBits can also be greater than 15 for optional gzip encoding. Add
+ 16 to windowBits to write a simple gzip header and trailer around the
+ compressed data instead of a zlib wrapper. The gzip header will have no
+ file name, no extra data, no comment, no modification time (set to zero),
+ no header crc, and the operating system will be set to 255 (unknown). If a
+ gzip stream is being written, strm->adler is a crc32 instead of an adler32.
+
+ The memLevel parameter specifies how much memory should be allocated
+ for the internal compression state. memLevel=1 uses minimum memory but
+ is slow and reduces compression ratio; memLevel=9 uses maximum memory
+ for optimal speed. The default value is 8. See zconf.h for total memory
+ usage as a function of windowBits and memLevel.
+
+ The strategy parameter is used to tune the compression algorithm. Use the
+ value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
+ filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no
+ string match), or Z_RLE to limit match distances to one (run-length
+ encoding). Filtered data consists mostly of small values with a somewhat
+ random distribution. In this case, the compression algorithm is tuned to
+ compress them better. The effect of Z_FILTERED is to force more Huffman
+ coding and less string matching; it is somewhat intermediate between
+ Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
+ Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
+ parameter only affects the compression ratio but not the correctness of the
+ compressed output even if it is not set appropriately. Z_FIXED prevents the
+ use of dynamic Huffman codes, allowing for a simpler decoder for special
+ applications.
+
+ deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
+ method). msg is set to null if there is no error message. deflateInit2 does
+ not perform any compression: this will be done by deflate().
+*/
+
+ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
+ const Bytef *dictionary,
+ uInt dictLength));
+/*
+ Initializes the compression dictionary from the given byte sequence
+ without producing any compressed output. This function must be called
+ immediately after deflateInit, deflateInit2 or deflateReset, before any
+ call of deflate. The compressor and decompressor must use exactly the same
+ dictionary (see inflateSetDictionary).
+
+ The dictionary should consist of strings (byte sequences) that are likely
+ to be encountered later in the data to be compressed, with the most commonly
+ used strings preferably put towards the end of the dictionary. Using a
+ dictionary is most useful when the data to be compressed is short and can be
+ predicted with good accuracy; the data can then be compressed better than
+ with the default empty dictionary.
+
+ Depending on the size of the compression data structures selected by
+ deflateInit or deflateInit2, a part of the dictionary may in effect be
+ discarded, for example if the dictionary is larger than the window size in
+ deflate or deflate2. Thus the strings most likely to be useful should be
+ put at the end of the dictionary, not at the front. In addition, the
+ current implementation of deflate will use at most the window size minus
+ 262 bytes of the provided dictionary.
+
+ Upon return of this function, strm->adler is set to the adler32 value
+ of the dictionary; the decompressor may later use this value to determine
+ which dictionary has been used by the compressor. (The adler32 value
+ applies to the whole dictionary even if only a subset of the dictionary is
+ actually used by the compressor.) If a raw deflate was requested, then the
+ adler32 value is not computed and strm->adler is not set.
+
+ deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
+ parameter is invalid (such as NULL dictionary) or the stream state is
+ inconsistent (for example if deflate has already been called for this stream
+ or if the compression method is bsort). deflateSetDictionary does not
+ perform any compression: this will be done by deflate().
+*/
+
+ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
+ z_streamp source));
+/*
+ Sets the destination stream as a complete copy of the source stream.
+
+ This function can be useful when several compression strategies will be
+ tried, for example when there are several ways of pre-processing the input
+ data with a filter. The streams that will be discarded should then be freed
+ by calling deflateEnd. Note that deflateCopy duplicates the internal
+ compression state which can be quite large, so this strategy is slow and
+ can consume lots of memory.
+
+ deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
+ (such as zalloc being NULL). msg is left unchanged in both source and
+ destination.
+*/
+
+ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
+/*
+ This function is equivalent to deflateEnd followed by deflateInit,
+ but does not free and reallocate all the internal compression state.
+ The stream will keep the same compression level and any other attributes
+ that may have been set by deflateInit2.
+
+ deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
+ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
+ int level,
+ int strategy));
+/*
+ Dynamically update the compression level and compression strategy. The
+ interpretation of level and strategy is as in deflateInit2. This can be
+ used to switch between compression and straight copy of the input data, or
+ to switch to a different kind of input data requiring a different
+ strategy. If the compression level is changed, the input available so far
+ is compressed with the old level (and may be flushed); the new level will
+ take effect only at the next call of deflate().
+
+ Before the call of deflateParams, the stream state must be set as for
+ a call of deflate(), since the currently available input may have to
+ be compressed and flushed. In particular, strm->avail_out must be non-zero.
+
+ deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
+ stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
+ if strm->avail_out was zero.
+*/
+
+ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
+ int good_length,
+ int max_lazy,
+ int nice_length,
+ int max_chain));
+/*
+ Fine tune deflate's internal compression parameters. This should only be
+ used by someone who understands the algorithm used by zlib's deflate for
+ searching for the best matching string, and even then only by the most
+ fanatic optimizer trying to squeeze out the last compressed bit for their
+ specific input data. Read the deflate.c source code for the meaning of the
+ max_lazy, good_length, nice_length, and max_chain parameters.
+
+ deflateTune() can be called after deflateInit() or deflateInit2(), and
+ returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream.
+ */
+
+ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
+ uLong sourceLen));
+/*
+ deflateBound() returns an upper bound on the compressed size after
+ deflation of sourceLen bytes. It must be called after deflateInit()
+ or deflateInit2(). This would be used to allocate an output buffer
+ for deflation in a single pass, and so would be called before deflate().
+*/
+
+ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
+ int bits,
+ int value));
+/*
+ deflatePrime() inserts bits in the deflate output stream. The intent
+ is that this function is used to start off the deflate output with the
+ bits leftover from a previous deflate stream when appending to it. As such,
+ this function can only be used for raw deflate, and must be used before the
+ first deflate() call after a deflateInit2() or deflateReset(). bits must be
+ less than or equal to 16, and that many of the least significant bits of
+ value will be inserted in the output.
+
+ deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent.
+*/
+
+ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
+ gz_headerp head));
+/*
+ deflateSetHeader() provides gzip header information for when a gzip
+ stream is requested by deflateInit2(). deflateSetHeader() may be called
+ after deflateInit2() or deflateReset() and before the first call of
+ deflate(). The text, time, os, extra field, name, and comment information
+ in the provided gz_header structure are written to the gzip header (xflag is
+ ignored -- the extra flags are set according to the compression level). The
+ caller must assure that, if not Z_NULL, name and comment are terminated with
+ a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
+ available there. If hcrc is true, a gzip header crc is included. Note that
+ the current versions of the command-line version of gzip (up through version
+ 1.3.x) do not support header crc's, and will report that it is a "multi-part
+ gzip file" and give up.
+
+ If deflateSetHeader is not used, the default gzip header has text false,
+ the time set to zero, and os set to 255, with no extra, name, or comment
+ fields. The gzip header is returned to the default state by deflateReset().
+
+ deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent.
+*/
+
+/*
+ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
+ int windowBits));
+
+ This is another version of inflateInit with an extra parameter. The
+ fields next_in, avail_in, zalloc, zfree and opaque must be initialized
+ before by the caller.
+
+ The windowBits parameter is the base two logarithm of the maximum window
+ size (the size of the history buffer). It should be in the range 8..15 for
+ this version of the library. The default value is 15 if inflateInit is used
+ instead. windowBits must be greater than or equal to the windowBits value
+ provided to deflateInit2() while compressing, or it must be equal to 15 if
+ deflateInit2() was not used. If a compressed stream with a larger window
+ size is given as input, inflate() will return with the error code
+ Z_DATA_ERROR instead of trying to allocate a larger window.
+
+ windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
+ determines the window size. inflate() will then process raw deflate data,
+ not looking for a zlib or gzip header, not generating a check value, and not
+ looking for any check values for comparison at the end of the stream. This
+ is for use with other formats that use the deflate compressed data format
+ such as zip. Those formats provide their own check values. If a custom
+ format is developed using the raw deflate format for compressed data, it is
+ recommended that a check value such as an adler32 or a crc32 be applied to
+ the uncompressed data as is done in the zlib, gzip, and zip formats. For
+ most applications, the zlib format should be used as is. Note that comments
+ above on the use in deflateInit2() applies to the magnitude of windowBits.
+
+ windowBits can also be greater than 15 for optional gzip decoding. Add
+ 32 to windowBits to enable zlib and gzip decoding with automatic header
+ detection, or add 16 to decode only the gzip format (the zlib format will
+ return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is
+ a crc32 instead of an adler32.
+
+ inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg
+ is set to null if there is no error message. inflateInit2 does not perform
+ any decompression apart from reading the zlib header if present: this will
+ be done by inflate(). (So next_in and avail_in may be modified, but next_out
+ and avail_out are unchanged.)
+*/
+
+ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
+ const Bytef *dictionary,
+ uInt dictLength));
+/*
+ Initializes the decompression dictionary from the given uncompressed byte
+ sequence. This function must be called immediately after a call of inflate,
+ if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
+ can be determined from the adler32 value returned by that call of inflate.
+ The compressor and decompressor must use exactly the same dictionary (see
+ deflateSetDictionary). For raw inflate, this function can be called
+ immediately after inflateInit2() or inflateReset() and before any call of
+ inflate() to set the dictionary. The application must insure that the
+ dictionary that was used for compression is provided.
+
+ inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
+ parameter is invalid (such as NULL dictionary) or the stream state is
+ inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
+ expected one (incorrect adler32 value). inflateSetDictionary does not
+ perform any decompression: this will be done by subsequent calls of
+ inflate().
+*/
+
+ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
+/*
+ Skips invalid compressed data until a full flush point (see above the
+ description of deflate with Z_FULL_FLUSH) can be found, or until all
+ available input is skipped. No output is provided.
+
+ inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
+ if no more input was provided, Z_DATA_ERROR if no flush point has been found,
+ or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
+ case, the application may save the current current value of total_in which
+ indicates where valid compressed data was found. In the error case, the
+ application may repeatedly call inflateSync, providing more input each time,
+ until success or end of the input data.
+*/
+
+ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
+ z_streamp source));
+/*
+ Sets the destination stream as a complete copy of the source stream.
+
+ This function can be useful when randomly accessing a large stream. The
+ first pass through the stream can periodically record the inflate state,
+ allowing restarting inflate at those points when randomly accessing the
+ stream.
+
+ inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
+ (such as zalloc being NULL). msg is left unchanged in both source and
+ destination.
+*/
+
+ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
+/*
+ This function is equivalent to inflateEnd followed by inflateInit,
+ but does not free and reallocate all the internal decompression state.
+ The stream will keep attributes that may have been set by inflateInit2.
+
+ inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
+ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
+ int bits,
+ int value));
+/*
+ This function inserts bits in the inflate input stream. The intent is
+ that this function is used to start inflating at a bit position in the
+ middle of a byte. The provided bits will be used before any bytes are used
+ from next_in. This function should only be used with raw inflate, and
+ should be used before the first inflate() call after inflateInit2() or
+ inflateReset(). bits must be less than or equal to 16, and that many of the
+ least significant bits of value will be inserted in the input.
+
+ inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent.
+*/
+
+ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
+ gz_headerp head));
+/*
+ inflateGetHeader() requests that gzip header information be stored in the
+ provided gz_header structure. inflateGetHeader() may be called after
+ inflateInit2() or inflateReset(), and before the first call of inflate().
+ As inflate() processes the gzip stream, head->done is zero until the header
+ is completed, at which time head->done is set to one. If a zlib stream is
+ being decoded, then head->done is set to -1 to indicate that there will be
+ no gzip header information forthcoming. Note that Z_BLOCK can be used to
+ force inflate() to return immediately after header processing is complete
+ and before any actual data is decompressed.
+
+ The text, time, xflags, and os fields are filled in with the gzip header
+ contents. hcrc is set to true if there is a header CRC. (The header CRC
+ was valid if done is set to one.) If extra is not Z_NULL, then extra_max
+ contains the maximum number of bytes to write to extra. Once done is true,
+ extra_len contains the actual extra field length, and extra contains the
+ extra field, or that field truncated if extra_max is less than extra_len.
+ If name is not Z_NULL, then up to name_max characters are written there,
+ terminated with a zero unless the length is greater than name_max. If
+ comment is not Z_NULL, then up to comm_max characters are written there,
+ terminated with a zero unless the length is greater than comm_max. When
+ any of extra, name, or comment are not Z_NULL and the respective field is
+ not present in the header, then that field is set to Z_NULL to signal its
+ absence. This allows the use of deflateSetHeader() with the returned
+ structure to duplicate the header. However if those fields are set to
+ allocated memory, then the application will need to save those pointers
+ elsewhere so that they can be eventually freed.
+
+ If inflateGetHeader is not used, then the header information is simply
+ discarded. The header is always checked for validity, including the header
+ CRC if present. inflateReset() will reset the process to discard the header
+ information. The application would need to call inflateGetHeader() again to
+ retrieve the header from the next gzip stream.
+
+ inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent.
+*/
+
+/*
+ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
+ unsigned char FAR *window));
+
+ Initialize the internal stream state for decompression using inflateBack()
+ calls. The fields zalloc, zfree and opaque in strm must be initialized
+ before the call. If zalloc and zfree are Z_NULL, then the default library-
+ derived memory allocation routines are used. windowBits is the base two
+ logarithm of the window size, in the range 8..15. window is a caller
+ supplied buffer of that size. Except for special applications where it is
+ assured that deflate was used with small window sizes, windowBits must be 15
+ and a 32K byte window must be supplied to be able to decompress general
+ deflate streams.
+
+ See inflateBack() for the usage of these routines.
+
+ inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
+ the paramaters are invalid, Z_MEM_ERROR if the internal state could not
+ be allocated, or Z_VERSION_ERROR if the version of the library does not
+ match the version of the header file.
+*/
+
+typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
+typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
+
+ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
+ in_func in, void FAR *in_desc,
+ out_func out, void FAR *out_desc));
+/*
+ inflateBack() does a raw inflate with a single call using a call-back
+ interface for input and output. This is more efficient than inflate() for
+ file i/o applications in that it avoids copying between the output and the
+ sliding window by simply making the window itself the output buffer. This
+ function trusts the application to not change the output buffer passed by
+ the output function, at least until inflateBack() returns.
+
+ inflateBackInit() must be called first to allocate the internal state
+ and to initialize the state with the user-provided window buffer.
+ inflateBack() may then be used multiple times to inflate a complete, raw
+ deflate stream with each call. inflateBackEnd() is then called to free
+ the allocated state.
+
+ A raw deflate stream is one with no zlib or gzip header or trailer.
+ This routine would normally be used in a utility that reads zip or gzip
+ files and writes out uncompressed files. The utility would decode the
+ header and process the trailer on its own, hence this routine expects
+ only the raw deflate stream to decompress. This is different from the
+ normal behavior of inflate(), which expects either a zlib or gzip header and
+ trailer around the deflate stream.
+
+ inflateBack() uses two subroutines supplied by the caller that are then
+ called by inflateBack() for input and output. inflateBack() calls those
+ routines until it reads a complete deflate stream and writes out all of the
+ uncompressed data, or until it encounters an error. The function's
+ parameters and return types are defined above in the in_func and out_func
+ typedefs. inflateBack() will call in(in_desc, &buf) which should return the
+ number of bytes of provided input, and a pointer to that input in buf. If
+ there is no input available, in() must return zero--buf is ignored in that
+ case--and inflateBack() will return a buffer error. inflateBack() will call
+ out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out()
+ should return zero on success, or non-zero on failure. If out() returns
+ non-zero, inflateBack() will return with an error. Neither in() nor out()
+ are permitted to change the contents of the window provided to
+ inflateBackInit(), which is also the buffer that out() uses to write from.
+ The length written by out() will be at most the window size. Any non-zero
+ amount of input may be provided by in().
+
+ For convenience, inflateBack() can be provided input on the first call by
+ setting strm->next_in and strm->avail_in. If that input is exhausted, then
+ in() will be called. Therefore strm->next_in must be initialized before
+ calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called
+ immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in
+ must also be initialized, and then if strm->avail_in is not zero, input will
+ initially be taken from strm->next_in[0 .. strm->avail_in - 1].
+
+ The in_desc and out_desc parameters of inflateBack() is passed as the
+ first parameter of in() and out() respectively when they are called. These
+ descriptors can be optionally used to pass any information that the caller-
+ supplied in() and out() functions need to do their job.
+
+ On return, inflateBack() will set strm->next_in and strm->avail_in to
+ pass back any unused input that was provided by the last in() call. The
+ return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
+ if in() or out() returned an error, Z_DATA_ERROR if there was a format
+ error in the deflate stream (in which case strm->msg is set to indicate the
+ nature of the error), or Z_STREAM_ERROR if the stream was not properly
+ initialized. In the case of Z_BUF_ERROR, an input or output error can be
+ distinguished using strm->next_in which will be Z_NULL only if in() returned
+ an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to
+ out() returning non-zero. (in() will always be called before out(), so
+ strm->next_in is assured to be defined if out() returns non-zero.) Note
+ that inflateBack() cannot return Z_OK.
+*/
+
+ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
+/*
+ All memory allocated by inflateBackInit() is freed.
+
+ inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
+ state was inconsistent.
+*/
+
+ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
+/* Return flags indicating compile-time options.
+
+ Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other:
+ 1.0: size of uInt
+ 3.2: size of uLong
+ 5.4: size of voidpf (pointer)
+ 7.6: size of z_off_t
+
+ Compiler, assembler, and debug options:
+ 8: DEBUG
+ 9: ASMV or ASMINF -- use ASM code
+ 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
+ 11: 0 (reserved)
+
+ One-time table building (smaller code, but not thread-safe if true):
+ 12: BUILDFIXED -- build static block decoding tables when needed
+ 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed
+ 14,15: 0 (reserved)
+
+ Library content (indicates missing functionality):
+ 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking
+ deflate code when not needed)
+ 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect
+ and decode gzip streams (to avoid linking crc code)
+ 18-19: 0 (reserved)
+
+ Operation variations (changes in library functionality):
+ 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate
+ 21: FASTEST -- deflate algorithm with only one, lowest compression level
+ 22,23: 0 (reserved)
+
+ The sprintf variant used by gzprintf (zero is best):
+ 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format
+ 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure!
+ 26: 0 = returns value, 1 = void -- 1 means inferred string length returned
+
+ Remainder:
+ 27-31: 0 (reserved)
+ */
+
+
+ /* utility functions */
+
+/*
+ The following utility functions are implemented on top of the
+ basic stream-oriented functions. To simplify the interface, some
+ default options are assumed (compression level and memory usage,
+ standard memory allocation functions). The source code of these
+ utility functions can easily be modified if you need special options.
+*/
+
+ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
+ const Bytef *source, uLong sourceLen));
+/*
+ Compresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be at least the value returned
+ by compressBound(sourceLen). Upon exit, destLen is the actual size of the
+ compressed buffer.
+ This function can be used to compress a whole file at once if the
+ input file is mmap'ed.
+ compress returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_BUF_ERROR if there was not enough room in the output
+ buffer.
+*/
+
+ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
+ const Bytef *source, uLong sourceLen,
+ int level));
+/*
+ Compresses the source buffer into the destination buffer. The level
+ parameter has the same meaning as in deflateInit. sourceLen is the byte
+ length of the source buffer. Upon entry, destLen is the total size of the
+ destination buffer, which must be at least the value returned by
+ compressBound(sourceLen). Upon exit, destLen is the actual size of the
+ compressed buffer.
+
+ compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+ Z_STREAM_ERROR if the level parameter is invalid.
+*/
+
+ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
+/*
+ compressBound() returns an upper bound on the compressed size after
+ compress() or compress2() on sourceLen bytes. It would be used before
+ a compress() or compress2() call to allocate the destination buffer.
+*/
+
+ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
+ const Bytef *source, uLong sourceLen));
+/*
+ Decompresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be large enough to hold the
+ entire uncompressed data. (The size of the uncompressed data must have
+ been saved previously by the compressor and transmitted to the decompressor
+ by some mechanism outside the scope of this compression library.)
+ Upon exit, destLen is the actual size of the compressed buffer.
+ This function can be used to decompress a whole file at once if the
+ input file is mmap'ed.
+
+ uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_BUF_ERROR if there was not enough room in the output
+ buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
+*/
+
+
+typedef voidp gzFile;
+
+ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
+/*
+ Opens a gzip (.gz) file for reading or writing. The mode parameter
+ is as in fopen ("rb" or "wb") but can also include a compression level
+ ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
+ Huffman only compression as in "wb1h", or 'R' for run-length encoding
+ as in "wb1R". (See the description of deflateInit2 for more information
+ about the strategy parameter.)
+
+ gzopen can be used to read a file which is not in gzip format; in this
+ case gzread will directly read from the file without decompression.
+
+ gzopen returns NULL if the file could not be opened or if there was
+ insufficient memory to allocate the (de)compression state; errno
+ can be checked to distinguish the two cases (if errno is zero, the
+ zlib error is Z_MEM_ERROR). */
+
+ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
+/*
+ gzdopen() associates a gzFile with the file descriptor fd. File
+ descriptors are obtained from calls like open, dup, creat, pipe or
+ fileno (in the file has been previously opened with fopen).
+ The mode parameter is as in gzopen.
+ The next call of gzclose on the returned gzFile will also close the
+ file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
+ descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
+ gzdopen returns NULL if there was insufficient memory to allocate
+ the (de)compression state.
+*/
+
+ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
+/*
+ Dynamically update the compression level or strategy. See the description
+ of deflateInit2 for the meaning of these parameters.
+ gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
+ opened for writing.
+*/
+
+ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
+/*
+ Reads the given number of uncompressed bytes from the compressed file.
+ If the input file was not in gzip format, gzread copies the given number
+ of bytes into the buffer.
+ gzread returns the number of uncompressed bytes actually read (0 for
+ end of file, -1 for error). */
+
+ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
+ voidpc buf, unsigned len));
+/*
+ Writes the given number of uncompressed bytes into the compressed file.
+ gzwrite returns the number of uncompressed bytes actually written
+ (0 in case of error).
+*/
+
+ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
+/*
+ Converts, formats, and writes the args to the compressed file under
+ control of the format string, as in fprintf. gzprintf returns the number of
+ uncompressed bytes actually written (0 in case of error). The number of
+ uncompressed bytes written is limited to 4095. The caller should assure that
+ this limit is not exceeded. If it is exceeded, then gzprintf() will return
+ return an error (0) with nothing written. In this case, there may also be a
+ buffer overflow with unpredictable consequences, which is possible only if
+ zlib was compiled with the insecure functions sprintf() or vsprintf()
+ because the secure snprintf() or vsnprintf() functions were not available.
+*/
+
+ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
+/*
+ Writes the given null-terminated string to the compressed file, excluding
+ the terminating null character.
+ gzputs returns the number of characters written, or -1 in case of error.
+*/
+
+ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
+/*
+ Reads bytes from the compressed file until len-1 characters are read, or
+ a newline character is read and transferred to buf, or an end-of-file
+ condition is encountered. The string is then terminated with a null
+ character.
+ gzgets returns buf, or Z_NULL in case of error.
+*/
+
+ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
+/*
+ Writes c, converted to an unsigned char, into the compressed file.
+ gzputc returns the value that was written, or -1 in case of error.
+*/
+
+ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
+/*
+ Reads one byte from the compressed file. gzgetc returns this byte
+ or -1 in case of end of file or error.
+*/
+
+ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
+/*
+ Push one character back onto the stream to be read again later.
+ Only one character of push-back is allowed. gzungetc() returns the
+ character pushed, or -1 on failure. gzungetc() will fail if a
+ character has been pushed but not read yet, or if c is -1. The pushed
+ character will be discarded if the stream is repositioned with gzseek()
+ or gzrewind().
+*/
+
+ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
+/*
+ Flushes all pending output into the compressed file. The parameter
+ flush is as in the deflate() function. The return value is the zlib
+ error number (see function gzerror below). gzflush returns Z_OK if
+ the flush parameter is Z_FINISH and all output could be flushed.
+ gzflush should be called only when strictly necessary because it can
+ degrade compression.
+*/
+
+ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
+ z_off_t offset, int whence));
+/*
+ Sets the starting position for the next gzread or gzwrite on the
+ given compressed file. The offset represents a number of bytes in the
+ uncompressed data stream. The whence parameter is defined as in lseek(2);
+ the value SEEK_END is not supported.
+ If the file is opened for reading, this function is emulated but can be
+ extremely slow. If the file is opened for writing, only forward seeks are
+ supported; gzseek then compresses a sequence of zeroes up to the new
+ starting position.
+
+ gzseek returns the resulting offset location as measured in bytes from
+ the beginning of the uncompressed stream, or -1 in case of error, in
+ particular if the file is opened for writing and the new starting position
+ would be before the current position.
+*/
+
+ZEXTERN int ZEXPORT gzrewind OF((gzFile file));
+/*
+ Rewinds the given file. This function is supported only for reading.
+
+ gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
+*/
+
+ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file));
+/*
+ Returns the starting position for the next gzread or gzwrite on the
+ given compressed file. This position represents a number of bytes in the
+ uncompressed data stream.
+
+ gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
+*/
+
+ZEXTERN int ZEXPORT gzeof OF((gzFile file));
+/*
+ Returns 1 when EOF has previously been detected reading the given
+ input stream, otherwise zero.
+*/
+
+ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
+/*
+ Returns 1 if file is being read directly without decompression, otherwise
+ zero.
+*/
+
+ZEXTERN int ZEXPORT gzclose OF((gzFile file));
+/*
+ Flushes all pending output if necessary, closes the compressed file
+ and deallocates all the (de)compression state. The return value is the zlib
+ error number (see function gzerror below).
+*/
+
+ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
+/*
+ Returns the error message for the last error which occurred on the
+ given compressed file. errnum is set to zlib error number. If an
+ error occurred in the file system and not in the compression library,
+ errnum is set to Z_ERRNO and the application may consult errno
+ to get the exact error code.
+*/
+
+ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
+/*
+ Clears the error and end-of-file flags for file. This is analogous to the
+ clearerr() function in stdio. This is useful for continuing to read a gzip
+ file that is being written concurrently.
+*/
+
+ /* checksum functions */
+
+/*
+ These functions are not related to compression but are exported
+ anyway because they might be useful in applications using the
+ compression library.
+*/
+
+ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
+/*
+ Update a running Adler-32 checksum with the bytes buf[0..len-1] and
+ return the updated checksum. If buf is NULL, this function returns
+ the required initial value for the checksum.
+ An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
+ much faster. Usage example:
+
+ uLong adler = adler32(0L, Z_NULL, 0);
+
+ while (read_buffer(buffer, length) != EOF) {
+ adler = adler32(adler, buffer, length);
+ }
+ if (adler != original_adler) error();
+*/
+
+ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
+ z_off_t len2));
+/*
+ Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
+ and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
+ each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
+ seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
+*/
+
+ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
+/*
+ Update a running CRC-32 with the bytes buf[0..len-1] and return the
+ updated CRC-32. If buf is NULL, this function returns the required initial
+ value for the for the crc. Pre- and post-conditioning (one's complement) is
+ performed within this function so it shouldn't be done by the application.
+ Usage example:
+
+ uLong crc = crc32(0L, Z_NULL, 0);
+
+ while (read_buffer(buffer, length) != EOF) {
+ crc = crc32(crc, buffer, length);
+ }
+ if (crc != original_crc) error();
+*/
+
+ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
+
+/*
+ Combine two CRC-32 check values into one. For two sequences of bytes,
+ seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
+ calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32
+ check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
+ len2.
+*/
+
+
+ /* various hacks, don't look :) */
+
+/* deflateInit and inflateInit are macros to allow checking the zlib version
+ * and the compiler's view of z_stream:
+ */
+ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
+ const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
+ const char *version, int stream_size));
+ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
+ int windowBits, int memLevel,
+ int strategy, const char *version,
+ int stream_size));
+ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
+ const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
+ unsigned char FAR *window,
+ const char *version,
+ int stream_size));
+#define deflateInit(strm, level) \
+ deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
+#define inflateInit(strm) \
+ inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
+#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
+ deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
+ (strategy), ZLIB_VERSION, sizeof(z_stream))
+#define inflateInit2(strm, windowBits) \
+ inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
+#define inflateBackInit(strm, windowBits, window) \
+ inflateBackInit_((strm), (windowBits), (window), \
+ ZLIB_VERSION, sizeof(z_stream))
+
+
+#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
+ struct internal_state {int dummy;}; /* hack for buggy compilers */
+#endif
+
+ZEXTERN const char * ZEXPORT zError OF((int));
+ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));
+ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZLIB_H */
--- /dev/null
+/* zutil.c -- target dependent utility functions for the compression library
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#include "zutil.h"
+
+#ifndef NO_DUMMY_DECL
+struct internal_state {int dummy;}; /* for buggy compilers */
+#endif
+
+const char * const z_errmsg[10] = {
+"need dictionary", /* Z_NEED_DICT 2 */
+"stream end", /* Z_STREAM_END 1 */
+"", /* Z_OK 0 */
+"file error", /* Z_ERRNO (-1) */
+"stream error", /* Z_STREAM_ERROR (-2) */
+"data error", /* Z_DATA_ERROR (-3) */
+"insufficient memory", /* Z_MEM_ERROR (-4) */
+"buffer error", /* Z_BUF_ERROR (-5) */
+"incompatible version",/* Z_VERSION_ERROR (-6) */
+""};
+
+
+const char * ZEXPORT zlibVersion()
+{
+ return ZLIB_VERSION;
+}
+
+uLong ZEXPORT zlibCompileFlags()
+{
+ uLong flags;
+
+ flags = 0;
+ switch (sizeof(uInt)) {
+ case 2: break;
+ case 4: flags += 1; break;
+ case 8: flags += 2; break;
+ default: flags += 3;
+ }
+ switch (sizeof(uLong)) {
+ case 2: break;
+ case 4: flags += 1 << 2; break;
+ case 8: flags += 2 << 2; break;
+ default: flags += 3 << 2;
+ }
+ switch (sizeof(voidpf)) {
+ case 2: break;
+ case 4: flags += 1 << 4; break;
+ case 8: flags += 2 << 4; break;
+ default: flags += 3 << 4;
+ }
+ switch (sizeof(z_off_t)) {
+ case 2: break;
+ case 4: flags += 1 << 6; break;
+ case 8: flags += 2 << 6; break;
+ default: flags += 3 << 6;
+ }
+#ifdef DEBUG
+ flags += 1 << 8;
+#endif
+#if defined(ASMV) || defined(ASMINF)
+ flags += 1 << 9;
+#endif
+#ifdef ZLIB_WINAPI
+ flags += 1 << 10;
+#endif
+#ifdef BUILDFIXED
+ flags += 1 << 12;
+#endif
+#ifdef DYNAMIC_CRC_TABLE
+ flags += 1 << 13;
+#endif
+#ifdef NO_GZCOMPRESS
+ flags += 1L << 16;
+#endif
+#ifdef NO_GZIP
+ flags += 1L << 17;
+#endif
+#ifdef PKZIP_BUG_WORKAROUND
+ flags += 1L << 20;
+#endif
+#ifdef FASTEST
+ flags += 1L << 21;
+#endif
+#ifdef STDC
+# ifdef NO_vsnprintf
+ flags += 1L << 25;
+# ifdef HAS_vsprintf_void
+ flags += 1L << 26;
+# endif
+# else
+# ifdef HAS_vsnprintf_void
+ flags += 1L << 26;
+# endif
+# endif
+#else
+ flags += 1L << 24;
+# ifdef NO_snprintf
+ flags += 1L << 25;
+# ifdef HAS_sprintf_void
+ flags += 1L << 26;
+# endif
+# else
+# ifdef HAS_snprintf_void
+ flags += 1L << 26;
+# endif
+# endif
+#endif
+ return flags;
+}
+
+#ifdef DEBUG
+
+# ifndef verbose
+# define verbose 0
+# endif
+int z_verbose = verbose;
+
+void z_error (m)
+ char *m;
+{
+ fprintf(stderr, "%s\n", m);
+ exit(1);
+}
+#endif
+
+/* exported to allow conversion of error code to string for compress() and
+ * uncompress()
+ */
+const char * ZEXPORT zError(err)
+ int err;
+{
+ return ERR_MSG(err);
+}
+
+#if defined(_WIN32_WCE)
+ /* The Microsoft C Run-Time Library for Windows CE doesn't have
+ * errno. We define it as a global variable to simplify porting.
+ * Its value is always 0 and should not be used.
+ */
+ int errno = 0;
+#endif
+
+#ifndef HAVE_MEMCPY
+
+void zmemcpy(dest, source, len)
+ Bytef* dest;
+ const Bytef* source;
+ uInt len;
+{
+ if (len == 0) return;
+ do {
+ *dest++ = *source++; /* ??? to be unrolled */
+ } while (--len != 0);
+}
+
+int zmemcmp(s1, s2, len)
+ const Bytef* s1;
+ const Bytef* s2;
+ uInt len;
+{
+ uInt j;
+
+ for (j = 0; j < len; j++) {
+ if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
+ }
+ return 0;
+}
+
+void zmemzero(dest, len)
+ Bytef* dest;
+ uInt len;
+{
+ if (len == 0) return;
+ do {
+ *dest++ = 0; /* ??? to be unrolled */
+ } while (--len != 0);
+}
+#endif
+
+
+#ifdef SYS16BIT
+
+#ifdef __TURBOC__
+/* Turbo C in 16-bit mode */
+
+# define MY_ZCALLOC
+
+/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
+ * and farmalloc(64K) returns a pointer with an offset of 8, so we
+ * must fix the pointer. Warning: the pointer must be put back to its
+ * original form in order to free it, use zcfree().
+ */
+
+#define MAX_PTR 10
+/* 10*64K = 640K */
+
+local int next_ptr = 0;
+
+typedef struct ptr_table_s {
+ voidpf org_ptr;
+ voidpf new_ptr;
+} ptr_table;
+
+local ptr_table table[MAX_PTR];
+/* This table is used to remember the original form of pointers
+ * to large buffers (64K). Such pointers are normalized with a zero offset.
+ * Since MSDOS is not a preemptive multitasking OS, this table is not
+ * protected from concurrent access. This hack doesn't work anyway on
+ * a protected system like OS/2. Use Microsoft C instead.
+ */
+
+voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
+{
+ voidpf buf = opaque; /* just to make some compilers happy */
+ ulg bsize = (ulg)items*size;
+
+ /* If we allocate less than 65520 bytes, we assume that farmalloc
+ * will return a usable pointer which doesn't have to be normalized.
+ */
+ if (bsize < 65520L) {
+ buf = farmalloc(bsize);
+ if (*(ush*)&buf != 0) return buf;
+ } else {
+ buf = farmalloc(bsize + 16L);
+ }
+ if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
+ table[next_ptr].org_ptr = buf;
+
+ /* Normalize the pointer to seg:0 */
+ *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
+ *(ush*)&buf = 0;
+ table[next_ptr++].new_ptr = buf;
+ return buf;
+}
+
+void zcfree (voidpf opaque, voidpf ptr)
+{
+ int n;
+ if (*(ush*)&ptr != 0) { /* object < 64K */
+ farfree(ptr);
+ return;
+ }
+ /* Find the original pointer */
+ for (n = 0; n < next_ptr; n++) {
+ if (ptr != table[n].new_ptr) continue;
+
+ farfree(table[n].org_ptr);
+ while (++n < next_ptr) {
+ table[n-1] = table[n];
+ }
+ next_ptr--;
+ return;
+ }
+ ptr = opaque; /* just to make some compilers happy */
+ Assert(0, "zcfree: ptr not found");
+}
+
+#endif /* __TURBOC__ */
+
+
+#ifdef M_I86
+/* Microsoft C in 16-bit mode */
+
+# define MY_ZCALLOC
+
+#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
+# define _halloc halloc
+# define _hfree hfree
+#endif
+
+voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
+{
+ if (opaque) opaque = 0; /* to make compiler happy */
+ return _halloc((long)items, size);
+}
+
+void zcfree (voidpf opaque, voidpf ptr)
+{
+ if (opaque) opaque = 0; /* to make compiler happy */
+ _hfree(ptr);
+}
+
+#endif /* M_I86 */
+
+#endif /* SYS16BIT */
+
+
+#ifndef MY_ZCALLOC /* Any system without a special alloc function */
+
+#ifndef STDC
+extern voidp malloc OF((uInt size));
+extern voidp calloc OF((uInt items, uInt size));
+extern void free OF((voidpf ptr));
+#endif
+
+voidpf zcalloc (opaque, items, size)
+ voidpf opaque;
+ unsigned items;
+ unsigned size;
+{
+ if (opaque) items += size - size; /* make compiler happy */
+ return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
+ (voidpf)calloc(items, size);
+}
+
+void zcfree (opaque, ptr)
+ voidpf opaque;
+ voidpf ptr;
+{
+ free(ptr);
+ if (opaque) return; /* make compiler happy */
+}
+
+#endif /* MY_ZCALLOC */
--- /dev/null
+/* zutil.h -- internal interface and configuration of the compression library
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+ part of the implementation of the compression library and is
+ subject to change. Applications should only use zlib.h.
+ */
+
+/* @(#) $Id$ */
+
+#ifndef ZUTIL_H
+#define ZUTIL_H
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+#ifdef STDC
+# ifndef _WIN32_WCE
+# include <stddef.h>
+# endif
+# include <string.h>
+# include <stdlib.h>
+#endif
+#ifdef NO_ERRNO_H
+# ifdef _WIN32_WCE
+ /* The Microsoft C Run-Time Library for Windows CE doesn't have
+ * errno. We define it as a global variable to simplify porting.
+ * Its value is always 0 and should not be used. We rename it to
+ * avoid conflict with other libraries that use the same workaround.
+ */
+# define errno z_errno
+# endif
+ extern int errno;
+#else
+# ifndef _WIN32_WCE
+# include <errno.h>
+# endif
+#endif
+
+#ifndef local
+# define local static
+#endif
+/* compile with -Dlocal if your debugger can't find static symbols */
+
+typedef unsigned char uch;
+typedef uch FAR uchf;
+typedef unsigned short ush;
+typedef ush FAR ushf;
+typedef unsigned long ulg;
+
+extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
+/* (size given to avoid silly warnings with Visual C++) */
+
+#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
+
+#define ERR_RETURN(strm,err) \
+ return (strm->msg = (char*)ERR_MSG(err), (err))
+/* To be used only when the state is known to be valid */
+
+ /* common constants */
+
+#ifndef DEF_WBITS
+# define DEF_WBITS MAX_WBITS
+#endif
+/* default windowBits for decompression. MAX_WBITS is for compression only */
+
+#if MAX_MEM_LEVEL >= 8
+# define DEF_MEM_LEVEL 8
+#else
+# define DEF_MEM_LEVEL MAX_MEM_LEVEL
+#endif
+/* default memLevel */
+
+#define STORED_BLOCK 0
+#define STATIC_TREES 1
+#define DYN_TREES 2
+/* The three kinds of block type */
+
+#define MIN_MATCH 3
+#define MAX_MATCH 258
+/* The minimum and maximum match lengths */
+
+#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
+
+ /* target dependencies */
+
+#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
+# define OS_CODE 0x00
+# if defined(__TURBOC__) || defined(__BORLANDC__)
+# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
+ /* Allow compilation with ANSI keywords only enabled */
+ void _Cdecl farfree( void *block );
+ void *_Cdecl farmalloc( unsigned long nbytes );
+# else
+# include <alloc.h>
+# endif
+# else /* MSC or DJGPP */
+# include <malloc.h>
+# endif
+#endif
+
+#ifdef AMIGA
+# define OS_CODE 0x01
+#endif
+
+#if defined(VAXC) || defined(VMS)
+# define OS_CODE 0x02
+# define F_OPEN(name, mode) \
+ fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
+#endif
+
+#if defined(ATARI) || defined(atarist)
+# define OS_CODE 0x05
+#endif
+
+#ifdef OS2
+# define OS_CODE 0x06
+# ifdef M_I86
+ #include <malloc.h>
+# endif
+#endif
+
+#if defined(MACOS) || defined(TARGET_OS_MAC)
+# define OS_CODE 0x07
+# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+# include <unix.h> /* for fdopen */
+# else
+# ifndef fdopen
+# define fdopen(fd,mode) NULL /* No fdopen() */
+# endif
+# endif
+#endif
+
+#ifdef TOPS20
+# define OS_CODE 0x0a
+#endif
+
+#ifdef WIN32
+# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
+# define OS_CODE 0x0b
+# endif
+#endif
+
+#ifdef __50SERIES /* Prime/PRIMOS */
+# define OS_CODE 0x0f
+#endif
+
+#if defined(_BEOS_) || defined(RISCOS)
+# define fdopen(fd,mode) NULL /* No fdopen() */
+#endif
+
+#if (defined(_MSC_VER) && (_MSC_VER > 600))
+# if defined(_WIN32_WCE)
+# define fdopen(fd,mode) NULL /* No fdopen() */
+# ifndef _PTRDIFF_T_DEFINED
+ typedef int ptrdiff_t;
+# define _PTRDIFF_T_DEFINED
+# endif
+# else
+# define fdopen(fd,type) _fdopen(fd,type)
+# endif
+#endif
+
+ /* common defaults */
+
+#ifndef OS_CODE
+# define OS_CODE 0x03 /* assume Unix */
+#endif
+
+#ifndef F_OPEN
+# define F_OPEN(name, mode) fopen((name), (mode))
+#endif
+
+ /* functions */
+
+#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+#if defined(__CYGWIN__)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+#ifndef HAVE_VSNPRINTF
+# ifdef MSDOS
+ /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
+ but for now we just assume it doesn't. */
+# define NO_vsnprintf
+# endif
+# ifdef __TURBOC__
+# define NO_vsnprintf
+# endif
+# ifdef WIN32
+ /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
+# if !defined(vsnprintf) && !defined(NO_vsnprintf)
+# define vsnprintf _vsnprintf
+# endif
+# endif
+# ifdef __SASC
+# define NO_vsnprintf
+# endif
+#endif
+#ifdef VMS
+# define NO_vsnprintf
+#endif
+
+#if defined(pyr)
+# define NO_MEMCPY
+#endif
+#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
+ /* Use our own functions for small and medium model with MSC <= 5.0.
+ * You may have to use the same strategy for Borland C (untested).
+ * The __SC__ check is for Symantec.
+ */
+# define NO_MEMCPY
+#endif
+#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
+# define HAVE_MEMCPY
+#endif
+#ifdef HAVE_MEMCPY
+# ifdef SMALL_MEDIUM /* MSDOS small or medium model */
+# define zmemcpy _fmemcpy
+# define zmemcmp _fmemcmp
+# define zmemzero(dest, len) _fmemset(dest, 0, len)
+# else
+# define zmemcpy memcpy
+# define zmemcmp memcmp
+# define zmemzero(dest, len) memset(dest, 0, len)
+# endif
+#else
+ extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
+ extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
+ extern void zmemzero OF((Bytef* dest, uInt len));
+#endif
+
+/* Diagnostic functions */
+#ifdef DEBUG
+# include <stdio.h>
+ extern int z_verbose;
+ extern void z_error OF((char *m));
+# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
+# define Trace(x) {if (z_verbose>=0) fprintf x ;}
+# define Tracev(x) {if (z_verbose>0) fprintf x ;}
+# define Tracevv(x) {if (z_verbose>1) fprintf x ;}
+# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
+# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
+#else
+# define Assert(cond,msg)
+# define Trace(x)
+# define Tracev(x)
+# define Tracevv(x)
+# define Tracec(c,x)
+# define Tracecv(c,x)
+#endif
+
+
+voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
+void zcfree OF((voidpf opaque, voidpf ptr));
+
+#define ZALLOC(strm, items, size) \
+ (*((strm)->zalloc))((strm)->opaque, (items), (size))
+#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
+#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
+
+#endif /* ZUTIL_H */
+++ /dev/null
-include_directories(${CMAKE_CURRENT_SOURCE_DIR})
-
-add_library (z_bundled STATIC
- adler32.c
- compress.c
- crc32.c
- gzio.c
- uncompr.c
- deflate.c
- trees.c
- zutil.c
- inflate.c
- infback.c
- inftrees.c
- inffast.c
-)
-
-set_target_properties (z_bundled PROPERTIES
- COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS}"
-)
+++ /dev/null
-
- ChangeLog file for zlib
-
-Changes in 1.2.3 (18 July 2005)
-- Apply security vulnerability fixes to contrib/infback9 as well
-- Clean up some text files (carriage returns, trailing space)
-- Update testzlib, vstudio, masmx64, and masmx86 in contrib [Vollant]
-
-Changes in 1.2.2.4 (11 July 2005)
-- Add inflatePrime() function for starting inflation at bit boundary
-- Avoid some Visual C warnings in deflate.c
-- Avoid more silly Visual C warnings in inflate.c and inftrees.c for 64-bit
- compile
-- Fix some spelling errors in comments [Betts]
-- Correct inflateInit2() error return documentation in zlib.h
-- Added zran.c example of compressed data random access to examples
- directory, shows use of inflatePrime()
-- Fix cast for assignments to strm->state in inflate.c and infback.c
-- Fix zlibCompileFlags() in zutil.c to use 1L for long shifts [Oberhumer]
-- Move declarations of gf2 functions to right place in crc32.c [Oberhumer]
-- Add cast in trees.c t avoid a warning [Oberhumer]
-- Avoid some warnings in fitblk.c, gun.c, gzjoin.c in examples [Oberhumer]
-- Update make_vms.com [Zinser]
-- Initialize state->write in inflateReset() since copied in inflate_fast()
-- Be more strict on incomplete code sets in inflate_table() and increase
- ENOUGH and MAXD -- this repairs a possible security vulnerability for
- invalid inflate input. Thanks to Tavis Ormandy and Markus Oberhumer for
- discovering the vulnerability and providing test cases.
-- Add ia64 support to configure for HP-UX [Smith]
-- Add error return to gzread() for format or i/o error [Levin]
-- Use malloc.h for OS/2 [Necasek]
-
-Changes in 1.2.2.3 (27 May 2005)
-- Replace 1U constants in inflate.c and inftrees.c for 64-bit compile
-- Typecast fread() return values in gzio.c [Vollant]
-- Remove trailing space in minigzip.c outmode (VC++ can't deal with it)
-- Fix crc check bug in gzread() after gzungetc() [Heiner]
-- Add the deflateTune() function to adjust internal compression parameters
-- Add a fast gzip decompressor, gun.c, to examples (use of inflateBack)
-- Remove an incorrect assertion in examples/zpipe.c
-- Add C++ wrapper in infback9.h [Donais]
-- Fix bug in inflateCopy() when decoding fixed codes
-- Note in zlib.h how much deflateSetDictionary() actually uses
-- Remove USE_DICT_HEAD in deflate.c (would mess up inflate if used)
-- Add _WIN32_WCE to define WIN32 in zconf.in.h [Spencer]
-- Don't include stderr.h or errno.h for _WIN32_WCE in zutil.h [Spencer]
-- Add gzdirect() function to indicate transparent reads
-- Update contrib/minizip [Vollant]
-- Fix compilation of deflate.c when both ASMV and FASTEST [Oberhumer]
-- Add casts in crc32.c to avoid warnings [Oberhumer]
-- Add contrib/masmx64 [Vollant]
-- Update contrib/asm586, asm686, masmx86, testzlib, vstudio [Vollant]
-
-Changes in 1.2.2.2 (30 December 2004)
-- Replace structure assignments in deflate.c and inflate.c with zmemcpy to
- avoid implicit memcpy calls (portability for no-library compilation)
-- Increase sprintf() buffer size in gzdopen() to allow for large numbers
-- Add INFLATE_STRICT to check distances against zlib header
-- Improve WinCE errno handling and comments [Chang]
-- Remove comment about no gzip header processing in FAQ
-- Add Z_FIXED strategy option to deflateInit2() to force fixed trees
-- Add updated make_vms.com [Coghlan], update README
-- Create a new "examples" directory, move gzappend.c there, add zpipe.c,
- fitblk.c, gzlog.[ch], gzjoin.c, and zlib_how.html.
-- Add FAQ entry and comments in deflate.c on uninitialized memory access
-- Add Solaris 9 make options in configure [Gilbert]
-- Allow strerror() usage in gzio.c for STDC
-- Fix DecompressBuf in contrib/delphi/ZLib.pas [ManChesTer]
-- Update contrib/masmx86/inffas32.asm and gvmat32.asm [Vollant]
-- Use z_off_t for adler32_combine() and crc32_combine() lengths
-- Make adler32() much faster for small len
-- Use OS_CODE in deflate() default gzip header
-
-Changes in 1.2.2.1 (31 October 2004)
-- Allow inflateSetDictionary() call for raw inflate
-- Fix inflate header crc check bug for file names and comments
-- Add deflateSetHeader() and gz_header structure for custom gzip headers
-- Add inflateGetheader() to retrieve gzip headers
-- Add crc32_combine() and adler32_combine() functions
-- Add alloc_func, free_func, in_func, out_func to Z_PREFIX list
-- Use zstreamp consistently in zlib.h (inflate_back functions)
-- Remove GUNZIP condition from definition of inflate_mode in inflate.h
- and in contrib/inflate86/inffast.S [Truta, Anderson]
-- Add support for AMD64 in contrib/inflate86/inffas86.c [Anderson]
-- Update projects/README.projects and projects/visualc6 [Truta]
-- Update win32/DLL_FAQ.txt [Truta]
-- Avoid warning under NO_GZCOMPRESS in gzio.c; fix typo [Truta]
-- Deprecate Z_ASCII; use Z_TEXT instead [Truta]
-- Use a new algorithm for setting strm->data_type in trees.c [Truta]
-- Do not define an exit() prototype in zutil.c unless DEBUG defined
-- Remove prototype of exit() from zutil.c, example.c, minigzip.c [Truta]
-- Add comment in zlib.h for Z_NO_FLUSH parameter to deflate()
-- Fix Darwin build version identification [Peterson]
-
-Changes in 1.2.2 (3 October 2004)
-- Update zlib.h comments on gzip in-memory processing
-- Set adler to 1 in inflateReset() to support Java test suite [Walles]
-- Add contrib/dotzlib [Ravn]
-- Update win32/DLL_FAQ.txt [Truta]
-- Update contrib/minizip [Vollant]
-- Move contrib/visual-basic.txt to old/ [Truta]
-- Fix assembler builds in projects/visualc6/ [Truta]
-
-Changes in 1.2.1.2 (9 September 2004)
-- Update INDEX file
-- Fix trees.c to update strm->data_type (no one ever noticed!)
-- Fix bug in error case in inflate.c, infback.c, and infback9.c [Brown]
-- Add "volatile" to crc table flag declaration (for DYNAMIC_CRC_TABLE)
-- Add limited multitasking protection to DYNAMIC_CRC_TABLE
-- Add NO_vsnprintf for VMS in zutil.h [Mozilla]
-- Don't declare strerror() under VMS [Mozilla]
-- Add comment to DYNAMIC_CRC_TABLE to use get_crc_table() to initialize
-- Update contrib/ada [Anisimkov]
-- Update contrib/minizip [Vollant]
-- Fix configure to not hardcode directories for Darwin [Peterson]
-- Fix gzio.c to not return error on empty files [Brown]
-- Fix indentation; update version in contrib/delphi/ZLib.pas and
- contrib/pascal/zlibpas.pas [Truta]
-- Update mkasm.bat in contrib/masmx86 [Truta]
-- Update contrib/untgz [Truta]
-- Add projects/README.projects [Truta]
-- Add project for MS Visual C++ 6.0 in projects/visualc6 [Cadieux, Truta]
-- Update win32/DLL_FAQ.txt [Truta]
-- Update list of Z_PREFIX symbols in zconf.h [Randers-Pehrson, Truta]
-- Remove an unnecessary assignment to curr in inftrees.c [Truta]
-- Add OS/2 to exe builds in configure [Poltorak]
-- Remove err dummy parameter in zlib.h [Kientzle]
-
-Changes in 1.2.1.1 (9 January 2004)
-- Update email address in README
-- Several FAQ updates
-- Fix a big fat bug in inftrees.c that prevented decoding valid
- dynamic blocks with only literals and no distance codes --
- Thanks to "Hot Emu" for the bug report and sample file
-- Add a note to puff.c on no distance codes case.
-
-Changes in 1.2.1 (17 November 2003)
-- Remove a tab in contrib/gzappend/gzappend.c
-- Update some interfaces in contrib for new zlib functions
-- Update zlib version number in some contrib entries
-- Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
-- Support shared libraries on Hurd and KFreeBSD [Brown]
-- Fix error in NO_DIVIDE option of adler32.c
-
-Changes in 1.2.0.8 (4 November 2003)
-- Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
-- Add experimental NO_DIVIDE #define in adler32.c
- - Possibly faster on some processors (let me know if it is)
-- Correct Z_BLOCK to not return on first inflate call if no wrap
-- Fix strm->data_type on inflate() return to correctly indicate EOB
-- Add deflatePrime() function for appending in the middle of a byte
-- Add contrib/gzappend for an example of appending to a stream
-- Update win32/DLL_FAQ.txt [Truta]
-- Delete Turbo C comment in README [Truta]
-- Improve some indentation in zconf.h [Truta]
-- Fix infinite loop on bad input in configure script [Church]
-- Fix gzeof() for concatenated gzip files [Johnson]
-- Add example to contrib/visual-basic.txt [Michael B.]
-- Add -p to mkdir's in Makefile.in [vda]
-- Fix configure to properly detect presence or lack of printf functions
-- Add AS400 support [Monnerat]
-- Add a little Cygwin support [Wilson]
-
-Changes in 1.2.0.7 (21 September 2003)
-- Correct some debug formats in contrib/infback9
-- Cast a type in a debug statement in trees.c
-- Change search and replace delimiter in configure from % to # [Beebe]
-- Update contrib/untgz to 0.2 with various fixes [Truta]
-- Add build support for Amiga [Nikl]
-- Remove some directories in old that have been updated to 1.2
-- Add dylib building for Mac OS X in configure and Makefile.in
-- Remove old distribution stuff from Makefile
-- Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
-- Update links in README
-
-Changes in 1.2.0.6 (13 September 2003)
-- Minor FAQ updates
-- Update contrib/minizip to 1.00 [Vollant]
-- Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
-- Update POSTINC comment for 68060 [Nikl]
-- Add contrib/infback9 with deflate64 decoding (unsupported)
-- For MVS define NO_vsnprintf and undefine FAR [van Burik]
-- Add pragma for fdopen on MVS [van Burik]
-
-Changes in 1.2.0.5 (8 September 2003)
-- Add OF to inflateBackEnd() declaration in zlib.h
-- Remember start when using gzdopen in the middle of a file
-- Use internal off_t counters in gz* functions to properly handle seeks
-- Perform more rigorous check for distance-too-far in inffast.c
-- Add Z_BLOCK flush option to return from inflate at block boundary
-- Set strm->data_type on return from inflate
- - Indicate bits unused, if at block boundary, and if in last block
-- Replace size_t with ptrdiff_t in crc32.c, and check for correct size
-- Add condition so old NO_DEFLATE define still works for compatibility
-- FAQ update regarding the Windows DLL [Truta]
-- INDEX update: add qnx entry, remove aix entry [Truta]
-- Install zlib.3 into mandir [Wilson]
-- Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta]
-- Adapt the zlib interface to the new DLL convention guidelines [Truta]
-- Introduce ZLIB_WINAPI macro to allow the export of functions using
- the WINAPI calling convention, for Visual Basic [Vollant, Truta]
-- Update msdos and win32 scripts and makefiles [Truta]
-- Export symbols by name, not by ordinal, in win32/zlib.def [Truta]
-- Add contrib/ada [Anisimkov]
-- Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta]
-- Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant]
-- Add contrib/masm686 [Truta]
-- Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm
- [Truta, Vollant]
-- Update contrib/delphi; rename to contrib/pascal; add example [Truta]
-- Remove contrib/delphi2; add a new contrib/delphi [Truta]
-- Avoid inclusion of the nonstandard <memory.h> in contrib/iostream,
- and fix some method prototypes [Truta]
-- Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip
- [Truta]
-- Avoid the use of backslash (\) in contrib/minizip [Vollant]
-- Fix file time handling in contrib/untgz; update makefiles [Truta]
-- Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines
- [Vollant]
-- Remove contrib/vstudio/vc15_16 [Vollant]
-- Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta]
-- Update README.contrib [Truta]
-- Invert the assignment order of match_head and s->prev[...] in
- INSERT_STRING [Truta]
-- Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings
- [Truta]
-- Compare function pointers with 0, not with NULL or Z_NULL [Truta]
-- Fix prototype of syncsearch in inflate.c [Truta]
-- Introduce ASMINF macro to be enabled when using an ASM implementation
- of inflate_fast [Truta]
-- Change NO_DEFLATE to NO_GZCOMPRESS [Truta]
-- Modify test_gzio in example.c to take a single file name as a
- parameter [Truta]
-- Exit the example.c program if gzopen fails [Truta]
-- Add type casts around strlen in example.c [Truta]
-- Remove casting to sizeof in minigzip.c; give a proper type
- to the variable compared with SUFFIX_LEN [Truta]
-- Update definitions of STDC and STDC99 in zconf.h [Truta]
-- Synchronize zconf.h with the new Windows DLL interface [Truta]
-- Use SYS16BIT instead of __32BIT__ to distinguish between
- 16- and 32-bit platforms [Truta]
-- Use far memory allocators in small 16-bit memory models for
- Turbo C [Truta]
-- Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in
- zlibCompileFlags [Truta]
-- Cygwin has vsnprintf [Wilson]
-- In Windows16, OS_CODE is 0, as in MSDOS [Truta]
-- In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson]
-
-Changes in 1.2.0.4 (10 August 2003)
-- Minor FAQ updates
-- Be more strict when checking inflateInit2's windowBits parameter
-- Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well
-- Add gzip wrapper option to deflateInit2 using windowBits
-- Add updated QNX rule in configure and qnx directory [Bonnefoy]
-- Make inflate distance-too-far checks more rigorous
-- Clean up FAR usage in inflate
-- Add casting to sizeof() in gzio.c and minigzip.c
-
-Changes in 1.2.0.3 (19 July 2003)
-- Fix silly error in gzungetc() implementation [Vollant]
-- Update contrib/minizip and contrib/vstudio [Vollant]
-- Fix printf format in example.c
-- Correct cdecl support in zconf.in.h [Anisimkov]
-- Minor FAQ updates
-
-Changes in 1.2.0.2 (13 July 2003)
-- Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons
-- Attempt to avoid warnings in crc32.c for pointer-int conversion
-- Add AIX to configure, remove aix directory [Bakker]
-- Add some casts to minigzip.c
-- Improve checking after insecure sprintf() or vsprintf() calls
-- Remove #elif's from crc32.c
-- Change leave label to inf_leave in inflate.c and infback.c to avoid
- library conflicts
-- Remove inflate gzip decoding by default--only enable gzip decoding by
- special request for stricter backward compatibility
-- Add zlibCompileFlags() function to return compilation information
-- More typecasting in deflate.c to avoid warnings
-- Remove leading underscore from _Capital #defines [Truta]
-- Fix configure to link shared library when testing
-- Add some Windows CE target adjustments [Mai]
-- Remove #define ZLIB_DLL in zconf.h [Vollant]
-- Add zlib.3 [Rodgers]
-- Update RFC URL in deflate.c and algorithm.txt [Mai]
-- Add zlib_dll_FAQ.txt to contrib [Truta]
-- Add UL to some constants [Truta]
-- Update minizip and vstudio [Vollant]
-- Remove vestigial NEED_DUMMY_RETURN from zconf.in.h
-- Expand use of NO_DUMMY_DECL to avoid all dummy structures
-- Added iostream3 to contrib [Schwardt]
-- Replace rewind() with fseek() for WinCE [Truta]
-- Improve setting of zlib format compression level flags
- - Report 0 for huffman and rle strategies and for level == 0 or 1
- - Report 2 only for level == 6
-- Only deal with 64K limit when necessary at compile time [Truta]
-- Allow TOO_FAR check to be turned off at compile time [Truta]
-- Add gzclearerr() function [Souza]
-- Add gzungetc() function
-
-Changes in 1.2.0.1 (17 March 2003)
-- Add Z_RLE strategy for run-length encoding [Truta]
- - When Z_RLE requested, restrict matches to distance one
- - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE
-- Correct FASTEST compilation to allow level == 0
-- Clean up what gets compiled for FASTEST
-- Incorporate changes to zconf.in.h [Vollant]
- - Refine detection of Turbo C need for dummy returns
- - Refine ZLIB_DLL compilation
- - Include additional header file on VMS for off_t typedef
-- Try to use _vsnprintf where it supplants vsprintf [Vollant]
-- Add some casts in inffast.c
-- Enchance comments in zlib.h on what happens if gzprintf() tries to
- write more than 4095 bytes before compression
-- Remove unused state from inflateBackEnd()
-- Remove exit(0) from minigzip.c, example.c
-- Get rid of all those darn tabs
-- Add "check" target to Makefile.in that does the same thing as "test"
-- Add "mostlyclean" and "maintainer-clean" targets to Makefile.in
-- Update contrib/inflate86 [Anderson]
-- Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]
-- Add msdos and win32 directories with makefiles [Truta]
-- More additions and improvements to the FAQ
-
-Changes in 1.2.0 (9 March 2003)
-- New and improved inflate code
- - About 20% faster
- - Does not allocate 32K window unless and until needed
- - Automatically detects and decompresses gzip streams
- - Raw inflate no longer needs an extra dummy byte at end
- - Added inflateBack functions using a callback interface--even faster
- than inflate, useful for file utilities (gzip, zip)
- - Added inflateCopy() function to record state for random access on
- externally generated deflate streams (e.g. in gzip files)
- - More readable code (I hope)
-- New and improved crc32()
- - About 50% faster, thanks to suggestions from Rodney Brown
-- Add deflateBound() and compressBound() functions
-- Fix memory leak in deflateInit2()
-- Permit setting dictionary for raw deflate (for parallel deflate)
-- Fix const declaration for gzwrite()
-- Check for some malloc() failures in gzio.c
-- Fix bug in gzopen() on single-byte file 0x1f
-- Fix bug in gzread() on concatenated file with 0x1f at end of buffer
- and next buffer doesn't start with 0x8b
-- Fix uncompress() to return Z_DATA_ERROR on truncated input
-- Free memory at end of example.c
-- Remove MAX #define in trees.c (conflicted with some libraries)
-- Fix static const's in deflate.c, gzio.c, and zutil.[ch]
-- Declare malloc() and free() in gzio.c if STDC not defined
-- Use malloc() instead of calloc() in zutil.c if int big enough
-- Define STDC for AIX
-- Add aix/ with approach for compiling shared library on AIX
-- Add HP-UX support for shared libraries in configure
-- Add OpenUNIX support for shared libraries in configure
-- Use $cc instead of gcc to build shared library
-- Make prefix directory if needed when installing
-- Correct Macintosh avoidance of typedef Byte in zconf.h
-- Correct Turbo C memory allocation when under Linux
-- Use libz.a instead of -lz in Makefile (assure use of compiled library)
-- Update configure to check for snprintf or vsnprintf functions and their
- return value, warn during make if using an insecure function
-- Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
- is lost when library is used--resolution is to build new zconf.h
-- Documentation improvements (in zlib.h):
- - Document raw deflate and inflate
- - Update RFCs URL
- - Point out that zlib and gzip formats are different
- - Note that Z_BUF_ERROR is not fatal
- - Document string limit for gzprintf() and possible buffer overflow
- - Note requirement on avail_out when flushing
- - Note permitted values of flush parameter of inflate()
-- Add some FAQs (and even answers) to the FAQ
-- Add contrib/inflate86/ for x86 faster inflate
-- Add contrib/blast/ for PKWare Data Compression Library decompression
-- Add contrib/puff/ simple inflate for deflate format description
-
-Changes in 1.1.4 (11 March 2002)
-- ZFREE was repeated on same allocation on some error conditions.
- This creates a security problem described in
- http://www.zlib.org/advisory-2002-03-11.txt
-- Returned incorrect error (Z_MEM_ERROR) on some invalid data
-- Avoid accesses before window for invalid distances with inflate window
- less than 32K.
-- force windowBits > 8 to avoid a bug in the encoder for a window size
- of 256 bytes. (A complete fix will be available in 1.1.5).
-
-Changes in 1.1.3 (9 July 1998)
-- fix "an inflate input buffer bug that shows up on rare but persistent
- occasions" (Mark)
-- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
-- fix gzseek(..., SEEK_SET) in write mode
-- fix crc check after a gzeek (Frank Faubert)
-- fix miniunzip when the last entry in a zip file is itself a zip file
- (J Lillge)
-- add contrib/asm586 and contrib/asm686 (Brian Raiter)
- See http://www.muppetlabs.com/~breadbox/software/assembly.html
-- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
-- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
-- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
-- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
-- added a FAQ file
-
-- Support gzdopen on Mac with Metrowerks (Jason Linhart)
-- Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
-- define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
-- avoid some warnings with Borland C (Tom Tanner)
-- fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
-- emulate utime() for WIN32 in contrib/untgz (Gilles Vollant)
-- allow several arguments to configure (Tim Mooney, Frodo Looijaard)
-- use libdir and includedir in Makefile.in (Tim Mooney)
-- support shared libraries on OSF1 V4 (Tim Mooney)
-- remove so_locations in "make clean" (Tim Mooney)
-- fix maketree.c compilation error (Glenn, Mark)
-- Python interface to zlib now in Python 1.5 (Jeremy Hylton)
-- new Makefile.riscos (Rich Walker)
-- initialize static descriptors in trees.c for embedded targets (Nick Smith)
-- use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
-- add the OS/2 files in Makefile.in too (Andrew Zabolotny)
-- fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
-- fix maketree.c to allow clean compilation of inffixed.h (Mark)
-- fix parameter check in deflateCopy (Gunther Nikl)
-- cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
-- Many portability patches by Christian Spieler:
- . zutil.c, zutil.h: added "const" for zmem*
- . Make_vms.com: fixed some typos
- . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
- . msdos/Makefile.msc: remove "default rtl link library" info from obj files
- . msdos/Makefile.*: use model-dependent name for the built zlib library
- . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
- new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
-- use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
-- replace __far with _far for better portability (Christian Spieler, Tom Lane)
-- fix test for errno.h in configure (Tim Newsham)
-
-Changes in 1.1.2 (19 March 98)
-- added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
- See http://www.winimage.com/zLibDll/unzip.html
-- preinitialize the inflate tables for fixed codes, to make the code
- completely thread safe (Mark)
-- some simplifications and slight speed-up to the inflate code (Mark)
-- fix gzeof on non-compressed files (Allan Schrum)
-- add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
-- use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
-- added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
-- add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
-- do not wrap extern "C" around system includes (Tom Lane)
-- mention zlib binding for TCL in README (Andreas Kupries)
-- added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
-- allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
-- allow "configure --prefix $HOME" (Tim Mooney)
-- remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)
-- move Makefile.sas to amiga/Makefile.sas
-
-Changes in 1.1.1 (27 Feb 98)
-- fix macros _tr_tally_* in deflate.h for debug mode (Glenn Randers-Pehrson)
-- remove block truncation heuristic which had very marginal effect for zlib
- (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
- compression ratio on some files. This also allows inlining _tr_tally for
- matches in deflate_slow.
-- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
-
-Changes in 1.1.0 (24 Feb 98)
-- do not return STREAM_END prematurely in inflate (John Bowler)
-- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
-- compile with -DFASTEST to get compression code optimized for speed only
-- in minigzip, try mmap'ing the input file first (Miguel Albrecht)
-- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
- on Sun but significant on HP)
-
-- add a pointer to experimental unzip library in README (Gilles Vollant)
-- initialize variable gcc in configure (Chris Herborth)
-
-Changes in 1.0.9 (17 Feb 1998)
-- added gzputs and gzgets functions
-- do not clear eof flag in gzseek (Mark Diekhans)
-- fix gzseek for files in transparent mode (Mark Diekhans)
-- do not assume that vsprintf returns the number of bytes written (Jens Krinke)
-- replace EXPORT with ZEXPORT to avoid conflict with other programs
-- added compress2 in zconf.h, zlib.def, zlib.dnt
-- new asm code from Gilles Vollant in contrib/asm386
-- simplify the inflate code (Mark):
- . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
- . ZALLOC the length list in inflate_trees_fixed() instead of using stack
- . ZALLOC the value area for huft_build() instead of using stack
- . Simplify Z_FINISH check in inflate()
-
-- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
-- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
-- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
- the declaration of FAR (Gilles VOllant)
-- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
-- read_buf buf parameter of type Bytef* instead of charf*
-- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
-- do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
-- fix check for presence of directories in "make install" (Ian Willis)
-
-Changes in 1.0.8 (27 Jan 1998)
-- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
-- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
-- added compress2() to allow setting the compression level
-- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
-- use constant arrays for the static trees in trees.c instead of computing
- them at run time (thanks to Ken Raeburn for this suggestion). To create
- trees.h, compile with GEN_TREES_H and run "make test".
-- check return code of example in "make test" and display result
-- pass minigzip command line options to file_compress
-- simplifying code of inflateSync to avoid gcc 2.8 bug
-
-- support CC="gcc -Wall" in configure -s (QingLong)
-- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
-- fix test for shared library support to avoid compiler warnings
-- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
-- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
-- do not use fdopen for Metrowerks on Mac (Brad Pettit))
-- add checks for gzputc and gzputc in example.c
-- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
-- use const for the CRC table (Ken Raeburn)
-- fixed "make uninstall" for shared libraries
-- use Tracev instead of Trace in infblock.c
-- in example.c use correct compressed length for test_sync
-- suppress +vnocompatwarnings in configure for HPUX (not always supported)
-
-Changes in 1.0.7 (20 Jan 1998)
-- fix gzseek which was broken in write mode
-- return error for gzseek to negative absolute position
-- fix configure for Linux (Chun-Chung Chen)
-- increase stack space for MSC (Tim Wegner)
-- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
-- define EXPORTVA for gzprintf (Gilles Vollant)
-- added man page zlib.3 (Rick Rodgers)
-- for contrib/untgz, fix makedir() and improve Makefile
-
-- check gzseek in write mode in example.c
-- allocate extra buffer for seeks only if gzseek is actually called
-- avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)
-- add inflateSyncPoint in zconf.h
-- fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def
-
-Changes in 1.0.6 (19 Jan 1998)
-- add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
- gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
-- Fix a deflate bug occurring only with compression level 0 (thanks to
- Andy Buckler for finding this one).
-- In minigzip, pass transparently also the first byte for .Z files.
-- return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
-- check Z_FINISH in inflate (thanks to Marc Schluper)
-- Implement deflateCopy (thanks to Adam Costello)
-- make static libraries by default in configure, add --shared option.
-- move MSDOS or Windows specific files to directory msdos
-- suppress the notion of partial flush to simplify the interface
- (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
-- suppress history buffer provided by application to simplify the interface
- (this feature was not implemented anyway in 1.0.4)
-- next_in and avail_in must be initialized before calling inflateInit or
- inflateInit2
-- add EXPORT in all exported functions (for Windows DLL)
-- added Makefile.nt (thanks to Stephen Williams)
-- added the unsupported "contrib" directory:
- contrib/asm386/ by Gilles Vollant <info@winimage.com>
- 386 asm code replacing longest_match().
- contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
- A C++ I/O streams interface to the zlib gz* functions
- contrib/iostream2/ by Tyge Løvset <Tyge.Lovset@cmr.no>
- Another C++ I/O streams interface
- contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
- A very simple tar.gz file extractor using zlib
- contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
- How to use compress(), uncompress() and the gz* functions from VB.
-- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
- level) in minigzip (thanks to Tom Lane)
-
-- use const for rommable constants in deflate
-- added test for gzseek and gztell in example.c
-- add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
-- add undocumented function zError to convert error code to string
- (for Tim Smithers)
-- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.
-- Use default memcpy for Symantec MSDOS compiler.
-- Add EXPORT keyword for check_func (needed for Windows DLL)
-- add current directory to LD_LIBRARY_PATH for "make test"
-- create also a link for libz.so.1
-- added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)
-- use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)
-- added -soname for Linux in configure (Chun-Chung Chen,
-- assign numbers to the exported functions in zlib.def (for Windows DLL)
-- add advice in zlib.h for best usage of deflateSetDictionary
-- work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)
-- allow compilation with ANSI keywords only enabled for TurboC in large model
-- avoid "versionString"[0] (Borland bug)
-- add NEED_DUMMY_RETURN for Borland
-- use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
-- allow compilation with CC
-- defined STDC for OS/2 (David Charlap)
-- limit external names to 8 chars for MVS (Thomas Lund)
-- in minigzip.c, use static buffers only for 16-bit systems
-- fix suffix check for "minigzip -d foo.gz"
-- do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)
-- use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
-- added makelcc.bat for lcc-win32 (Tom St Denis)
-- in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
-- Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
-- check for unistd.h in configure (for off_t)
-- remove useless check parameter in inflate_blocks_free
-- avoid useless assignment of s->check to itself in inflate_blocks_new
-- do not flush twice in gzclose (thanks to Ken Raeburn)
-- rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h
-- use NO_ERRNO_H instead of enumeration of operating systems with errno.h
-- work around buggy fclose on pipes for HP/UX
-- support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)
-- fix configure if CC is already equal to gcc
-
-Changes in 1.0.5 (3 Jan 98)
-- Fix inflate to terminate gracefully when fed corrupted or invalid data
-- Use const for rommable constants in inflate
-- Eliminate memory leaks on error conditions in inflate
-- Removed some vestigial code in inflate
-- Update web address in README
-
-Changes in 1.0.4 (24 Jul 96)
-- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
- bit, so the decompressor could decompress all the correct data but went
- on to attempt decompressing extra garbage data. This affected minigzip too.
-- zlibVersion and gzerror return const char* (needed for DLL)
-- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
-- use z_error only for DEBUG (avoid problem with DLLs)
-
-Changes in 1.0.3 (2 Jul 96)
-- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
- small and medium models; this makes the library incompatible with previous
- versions for these models. (No effect in large model or on other systems.)
-- return OK instead of BUF_ERROR if previous deflate call returned with
- avail_out as zero but there is nothing to do
-- added memcmp for non STDC compilers
-- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
-- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
-- better check for 16-bit mode MSC (avoids problem with Symantec)
-
-Changes in 1.0.2 (23 May 96)
-- added Windows DLL support
-- added a function zlibVersion (for the DLL support)
-- fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
-- Bytef is define's instead of typedef'd only for Borland C
-- avoid reading uninitialized memory in example.c
-- mention in README that the zlib format is now RFC1950
-- updated Makefile.dj2
-- added algorithm.doc
-
-Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
-- fix array overlay in deflate.c which sometimes caused bad compressed data
-- fix inflate bug with empty stored block
-- fix MSDOS medium model which was broken in 0.99
-- fix deflateParams() which could generated bad compressed data.
-- Bytef is define'd instead of typedef'ed (work around Borland bug)
-- added an INDEX file
-- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
- Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
-- speed up adler32 for modern machines without auto-increment
-- added -ansi for IRIX in configure
-- static_init_done in trees.c is an int
-- define unlink as delete for VMS
-- fix configure for QNX
-- add configure branch for SCO and HPUX
-- avoid many warnings (unused variables, dead assignments, etc...)
-- no fdopen for BeOS
-- fix the Watcom fix for 32 bit mode (define FAR as empty)
-- removed redefinition of Byte for MKWERKS
-- work around an MWKERKS bug (incorrect merge of all .h files)
-
-Changes in 0.99 (27 Jan 96)
-- allow preset dictionary shared between compressor and decompressor
-- allow compression level 0 (no compression)
-- add deflateParams in zlib.h: allow dynamic change of compression level
- and compression strategy.
-- test large buffers and deflateParams in example.c
-- add optional "configure" to build zlib as a shared library
-- suppress Makefile.qnx, use configure instead
-- fixed deflate for 64-bit systems (detected on Cray)
-- fixed inflate_blocks for 64-bit systems (detected on Alpha)
-- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
-- always return Z_BUF_ERROR when deflate() has nothing to do
-- deflateInit and inflateInit are now macros to allow version checking
-- prefix all global functions and types with z_ with -DZ_PREFIX
-- make falloc completely reentrant (inftrees.c)
-- fixed very unlikely race condition in ct_static_init
-- free in reverse order of allocation to help memory manager
-- use zlib-1.0/* instead of zlib/* inside the tar.gz
-- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
- -Wconversion -Wstrict-prototypes -Wmissing-prototypes"
-- allow gzread on concatenated .gz files
-- deflateEnd now returns Z_DATA_ERROR if it was premature
-- deflate is finally (?) fully deterministic (no matches beyond end of input)
-- Document Z_SYNC_FLUSH
-- add uninstall in Makefile
-- Check for __cpluplus in zlib.h
-- Better test in ct_align for partial flush
-- avoid harmless warnings for Borland C++
-- initialize hash_head in deflate.c
-- avoid warning on fdopen (gzio.c) for HP cc -Aa
-- include stdlib.h for STDC compilers
-- include errno.h for Cray
-- ignore error if ranlib doesn't exist
-- call ranlib twice for NeXTSTEP
-- use exec_prefix instead of prefix for libz.a
-- renamed ct_* as _tr_* to avoid conflict with applications
-- clear z->msg in inflateInit2 before any error return
-- initialize opaque in example.c, gzio.c, deflate.c and inflate.c
-- fixed typo in zconf.h (_GNUC__ => __GNUC__)
-- check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)
-- fix typo in Make_vms.com (f$trnlnm -> f$getsyi)
-- in fcalloc, normalize pointer if size > 65520 bytes
-- don't use special fcalloc for 32 bit Borland C++
-- use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...
-- use Z_BINARY instead of BINARY
-- document that gzclose after gzdopen will close the file
-- allow "a" as mode in gzopen.
-- fix error checking in gzread
-- allow skipping .gz extra-field on pipes
-- added reference to Perl interface in README
-- put the crc table in FAR data (I dislike more and more the medium model :)
-- added get_crc_table
-- added a dimension to all arrays (Borland C can't count).
-- workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
-- guard against multiple inclusion of *.h (for precompiled header on Mac)
-- Watcom C pretends to be Microsoft C small model even in 32 bit mode.
-- don't use unsized arrays to avoid silly warnings by Visual C++:
- warning C4746: 'inflate_mask' : unsized array treated as '__far'
- (what's wrong with far data in far model?).
-- define enum out of inflate_blocks_state to allow compilation with C++
-
-Changes in 0.95 (16 Aug 95)
-- fix MSDOS small and medium model (now easier to adapt to any compiler)
-- inlined send_bits
-- fix the final (:-) bug for deflate with flush (output was correct but
- not completely flushed in rare occasions).
-- default window size is same for compression and decompression
- (it's now sufficient to set MAX_WBITS in zconf.h).
-- voidp -> voidpf and voidnp -> voidp (for consistency with other
- typedefs and because voidnp was not near in large model).
-
-Changes in 0.94 (13 Aug 95)
-- support MSDOS medium model
-- fix deflate with flush (could sometimes generate bad output)
-- fix deflateReset (zlib header was incorrectly suppressed)
-- added support for VMS
-- allow a compression level in gzopen()
-- gzflush now calls fflush
-- For deflate with flush, flush even if no more input is provided.
-- rename libgz.a as libz.a
-- avoid complex expression in infcodes.c triggering Turbo C bug
-- work around a problem with gcc on Alpha (in INSERT_STRING)
-- don't use inline functions (problem with some gcc versions)
-- allow renaming of Byte, uInt, etc... with #define.
-- avoid warning about (unused) pointer before start of array in deflate.c
-- avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
-- avoid reserved word 'new' in trees.c
-
-Changes in 0.93 (25 June 95)
-- temporarily disable inline functions
-- make deflate deterministic
-- give enough lookahead for PARTIAL_FLUSH
-- Set binary mode for stdin/stdout in minigzip.c for OS/2
-- don't even use signed char in inflate (not portable enough)
-- fix inflate memory leak for segmented architectures
-
-Changes in 0.92 (3 May 95)
-- don't assume that char is signed (problem on SGI)
-- Clear bit buffer when starting a stored block
-- no memcpy on Pyramid
-- suppressed inftest.c
-- optimized fill_window, put longest_match inline for gcc
-- optimized inflate on stored blocks.
-- untabify all sources to simplify patches
-
-Changes in 0.91 (2 May 95)
-- Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h
-- Document the memory requirements in zconf.h
-- added "make install"
-- fix sync search logic in inflateSync
-- deflate(Z_FULL_FLUSH) now works even if output buffer too short
-- after inflateSync, don't scare people with just "lo world"
-- added support for DJGPP
-
-Changes in 0.9 (1 May 95)
-- don't assume that zalloc clears the allocated memory (the TurboC bug
- was Mark's bug after all :)
-- let again gzread copy uncompressed data unchanged (was working in 0.71)
-- deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
-- added a test of inflateSync in example.c
-- moved MAX_WBITS to zconf.h because users might want to change that.
-- document explicitly that zalloc(64K) on MSDOS must return a normalized
- pointer (zero offset)
-- added Makefiles for Microsoft C, Turbo C, Borland C++
-- faster crc32()
-
-Changes in 0.8 (29 April 95)
-- added fast inflate (inffast.c)
-- deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
- is incompatible with previous versions of zlib which returned Z_OK.
-- work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
- (actually that was not a compiler bug, see 0.81 above)
-- gzread no longer reads one extra byte in certain cases
-- In gzio destroy(), don't reference a freed structure
-- avoid many warnings for MSDOS
-- avoid the ERROR symbol which is used by MS Windows
-
-Changes in 0.71 (14 April 95)
-- Fixed more MSDOS compilation problems :( There is still a bug with
- TurboC large model.
-
-Changes in 0.7 (14 April 95)
-- Added full inflate support.
-- Simplified the crc32() interface. The pre- and post-conditioning
- (one's complement) is now done inside crc32(). WARNING: this is
- incompatible with previous versions; see zlib.h for the new usage.
-
-Changes in 0.61 (12 April 95)
-- workaround for a bug in TurboC. example and minigzip now work on MSDOS.
-
-Changes in 0.6 (11 April 95)
-- added minigzip.c
-- added gzdopen to reopen a file descriptor as gzFile
-- added transparent reading of non-gziped files in gzread.
-- fixed bug in gzread (don't read crc as data)
-- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).
-- don't allocate big arrays in the stack (for MSDOS)
-- fix some MSDOS compilation problems
-
-Changes in 0.5:
-- do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
- not yet Z_FULL_FLUSH.
-- support decompression but only in a single step (forced Z_FINISH)
-- added opaque object for zalloc and zfree.
-- added deflateReset and inflateReset
-- added a variable zlib_version for consistency checking.
-- renamed the 'filter' parameter of deflateInit2 as 'strategy'.
- Added Z_FILTERED and Z_HUFFMAN_ONLY constants.
-
-Changes in 0.4:
-- avoid "zip" everywhere, use zlib instead of ziplib.
-- suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
- if compression method == 8.
-- added adler32 and crc32
-- renamed deflateOptions as deflateInit2, call one or the other but not both
-- added the method parameter for deflateInit2.
-- added inflateInit2
-- simplied considerably deflateInit and inflateInit by not supporting
- user-provided history buffer. This is supported only in deflateInit2
- and inflateInit2.
-
-Changes in 0.3:
-- prefix all macro names with Z_
-- use Z_FINISH instead of deflateEnd to finish compression.
-- added Z_HUFFMAN_ONLY
-- added gzerror()
+++ /dev/null
-ZLIB DATA COMPRESSION LIBRARY
-
-zlib 1.2.3 is a general purpose data compression library. All the code is
-thread safe. The data format used by the zlib library is described by RFCs
-(Request for Comments) 1950 to 1952 in the files
-http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
-and rfc1952.txt (gzip format). These documents are also available in other
-formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
-
-All functions of the compression library are documented in the file zlib.h
-(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
-of the library is given in the file example.c which also tests that the library
-is working correctly. Another example is given in the file minigzip.c. The
-compression library itself is composed of all source files except example.c and
-minigzip.c.
-
-To compile all files and run the test program, follow the instructions given at
-the top of Makefile. In short "make test; make install" should work for most
-machines. For Unix: "./configure; make test; make install". For MSDOS, use one
-of the special makefiles such as Makefile.msc. For VMS, use make_vms.com.
-
-Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
-<info@winimage.com> for the Windows DLL version. The zlib home page is
-http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem,
-please check this site to verify that you have the latest version of zlib;
-otherwise get the latest version and check whether the problem still exists or
-not.
-
-PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking
-for help.
-
-Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
-issue of Dr. Dobb's Journal; a copy of the article is available in
-http://dogma.net/markn/articles/zlibtool/zlibtool.htm
-
-The changes made in version 1.2.3 are documented in the file ChangeLog.
-
-Unsupported third party contributions are provided in directory "contrib".
-
-A Java implementation of zlib is available in the Java Development Kit
-http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html
-See the zlib home page http://www.zlib.org for details.
-
-A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the
-CPAN (Comprehensive Perl Archive Network) sites
-http://www.cpan.org/modules/by-module/Compress/
-
-A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
-available in Python 1.5 and later versions, see
-http://www.python.org/doc/lib/module-zlib.html
-
-A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is
-availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html
-
-An experimental package to read and write files in .zip format, written on top
-of zlib by Gilles Vollant <info@winimage.com>, is available in the
-contrib/minizip directory of zlib.
-
-
-Notes for some targets:
-
-- For Windows DLL versions, please see win32/DLL_FAQ.txt
-
-- For 64-bit Irix, deflate.c must be compiled without any optimization. With
- -O, one libpng test fails. The test works in 32 bit mode (with the -n32
- compiler flag). The compiler bug has been reported to SGI.
-
-- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
- when compiled with cc.
-
-- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
- necessary to get gzprintf working correctly. This is done by configure.
-
-- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
- other compilers. Use "make test" to check your compiler.
-
-- gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
-
-- For PalmOs, see http://palmzlib.sourceforge.net/
-
-- When building a shared, i.e. dynamic library on Mac OS X, the library must be
- installed before testing (do "make install" before "make test"), since the
- library location is specified in the library.
-
-
-Acknowledgments:
-
- The deflate format used by zlib was defined by Phil Katz. The deflate
- and zlib specifications were written by L. Peter Deutsch. Thanks to all the
- people who reported problems and suggested various improvements in zlib;
- they are too numerous to cite here.
-
-Copyright notice:
-
- (C) 1995-2004 Jean-loup Gailly and Mark Adler
-
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
-
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- 3. This notice may not be removed or altered from any source distribution.
-
- Jean-loup Gailly Mark Adler
- jloup@gzip.org madler@alumni.caltech.edu
-
-If you use the zlib library in a product, we would appreciate *not*
-receiving lengthy legal documents to sign. The sources are provided
-for free but without warranty of any kind. The library has been
-entirely written by Jean-loup Gailly and Mark Adler; it does not
-include third-party code.
-
-If you redistribute modified sources, we would appreciate that you include
-in the file ChangeLog history information documenting your changes. Please
-read the FAQ for more information on the distribution of modified source
-versions.
+++ /dev/null
-/* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-2004 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#define ZLIB_INTERNAL
-#include "zlib.h"
-
-#define BASE 65521UL /* largest prime smaller than 65536 */
-#define NMAX 5552
-/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
-
-#define DO1(buf,i) {adler += (buf)[i]; sum2 += adler;}
-#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
-#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
-#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
-#define DO16(buf) DO8(buf,0); DO8(buf,8);
-
-/* use NO_DIVIDE if your processor does not do division in hardware */
-#ifdef NO_DIVIDE
-# define MOD(a) \
- do { \
- if (a >= (BASE << 16)) a -= (BASE << 16); \
- if (a >= (BASE << 15)) a -= (BASE << 15); \
- if (a >= (BASE << 14)) a -= (BASE << 14); \
- if (a >= (BASE << 13)) a -= (BASE << 13); \
- if (a >= (BASE << 12)) a -= (BASE << 12); \
- if (a >= (BASE << 11)) a -= (BASE << 11); \
- if (a >= (BASE << 10)) a -= (BASE << 10); \
- if (a >= (BASE << 9)) a -= (BASE << 9); \
- if (a >= (BASE << 8)) a -= (BASE << 8); \
- if (a >= (BASE << 7)) a -= (BASE << 7); \
- if (a >= (BASE << 6)) a -= (BASE << 6); \
- if (a >= (BASE << 5)) a -= (BASE << 5); \
- if (a >= (BASE << 4)) a -= (BASE << 4); \
- if (a >= (BASE << 3)) a -= (BASE << 3); \
- if (a >= (BASE << 2)) a -= (BASE << 2); \
- if (a >= (BASE << 1)) a -= (BASE << 1); \
- if (a >= BASE) a -= BASE; \
- } while (0)
-# define MOD4(a) \
- do { \
- if (a >= (BASE << 4)) a -= (BASE << 4); \
- if (a >= (BASE << 3)) a -= (BASE << 3); \
- if (a >= (BASE << 2)) a -= (BASE << 2); \
- if (a >= (BASE << 1)) a -= (BASE << 1); \
- if (a >= BASE) a -= BASE; \
- } while (0)
-#else
-# define MOD(a) a %= BASE
-# define MOD4(a) a %= BASE
-#endif
-
-/* ========================================================================= */
-uLong ZEXPORT adler32(adler, buf, len)
- uLong adler;
- const Bytef *buf;
- uInt len;
-{
- unsigned long sum2;
- unsigned n;
-
- /* split Adler-32 into component sums */
- sum2 = (adler >> 16) & 0xffff;
- adler &= 0xffff;
-
- /* in case user likes doing a byte at a time, keep it fast */
- if (len == 1) {
- adler += buf[0];
- if (adler >= BASE)
- adler -= BASE;
- sum2 += adler;
- if (sum2 >= BASE)
- sum2 -= BASE;
- return adler | (sum2 << 16);
- }
-
- /* initial Adler-32 value (deferred check for len == 1 speed) */
- if (buf == Z_NULL)
- return 1L;
-
- /* in case short lengths are provided, keep it somewhat fast */
- if (len < 16) {
- while (len--) {
- adler += *buf++;
- sum2 += adler;
- }
- if (adler >= BASE)
- adler -= BASE;
- MOD4(sum2); /* only added so many BASE's */
- return adler | (sum2 << 16);
- }
-
- /* do length NMAX blocks -- requires just one modulo operation */
- while (len >= NMAX) {
- len -= NMAX;
- n = NMAX / 16; /* NMAX is divisible by 16 */
- do {
- DO16(buf); /* 16 sums unrolled */
- buf += 16;
- } while (--n);
- MOD(adler);
- MOD(sum2);
- }
-
- /* do remaining bytes (less than NMAX, still just one modulo) */
- if (len) { /* avoid modulos if none remaining */
- while (len >= 16) {
- len -= 16;
- DO16(buf);
- buf += 16;
- }
- while (len--) {
- adler += *buf++;
- sum2 += adler;
- }
- MOD(adler);
- MOD(sum2);
- }
-
- /* return recombined sums */
- return adler | (sum2 << 16);
-}
-
-/* ========================================================================= */
-uLong ZEXPORT adler32_combine(adler1, adler2, len2)
- uLong adler1;
- uLong adler2;
- z_off_t len2;
-{
- unsigned long sum1;
- unsigned long sum2;
- unsigned rem;
-
- /* the derivation of this formula is left as an exercise for the reader */
- rem = (unsigned)(len2 % BASE);
- sum1 = adler1 & 0xffff;
- sum2 = rem * sum1;
- MOD(sum2);
- sum1 += (adler2 & 0xffff) + BASE - 1;
- sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
- if (sum1 > BASE) sum1 -= BASE;
- if (sum1 > BASE) sum1 -= BASE;
- if (sum2 > (BASE << 1)) sum2 -= (BASE << 1);
- if (sum2 > BASE) sum2 -= BASE;
- return sum1 | (sum2 << 16);
-}
+++ /dev/null
-/* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2003 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#define ZLIB_INTERNAL
-#include "zlib.h"
-
-/* ===========================================================================
- Compresses the source buffer into the destination buffer. The level
- parameter has the same meaning as in deflateInit. sourceLen is the byte
- length of the source buffer. Upon entry, destLen is the total size of the
- destination buffer, which must be at least 0.1% larger than sourceLen plus
- 12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
-
- compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
- memory, Z_BUF_ERROR if there was not enough room in the output buffer,
- Z_STREAM_ERROR if the level parameter is invalid.
-*/
-int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
- Bytef *dest;
- uLongf *destLen;
- const Bytef *source;
- uLong sourceLen;
- int level;
-{
- z_stream stream;
- int err;
-
- stream.next_in = (Bytef*)source;
- stream.avail_in = (uInt)sourceLen;
-#ifdef MAXSEG_64K
- /* Check for source > 64K on 16-bit machine: */
- if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-#endif
- stream.next_out = dest;
- stream.avail_out = (uInt)*destLen;
- if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
-
- stream.zalloc = (alloc_func)0;
- stream.zfree = (free_func)0;
- stream.opaque = (voidpf)0;
-
- err = deflateInit(&stream, level);
- if (err != Z_OK) return err;
-
- err = deflate(&stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- deflateEnd(&stream);
- return err == Z_OK ? Z_BUF_ERROR : err;
- }
- *destLen = stream.total_out;
-
- err = deflateEnd(&stream);
- return err;
-}
-
-/* ===========================================================================
- */
-int ZEXPORT compress (dest, destLen, source, sourceLen)
- Bytef *dest;
- uLongf *destLen;
- const Bytef *source;
- uLong sourceLen;
-{
- return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
-}
-
-/* ===========================================================================
- If the default memLevel or windowBits for deflateInit() is changed, then
- this function needs to be updated.
- */
-uLong ZEXPORT compressBound (sourceLen)
- uLong sourceLen;
-{
- return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
-}
+++ /dev/null
-/* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2005 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- *
- * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
- * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
- * tables for updating the shift register in one step with three exclusive-ors
- * instead of four steps with four exclusive-ors. This results in about a
- * factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
- */
-
-/* @(#) $Id$ */
-
-/*
- Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
- protection on the static variables used to control the first-use generation
- of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should
- first call get_crc_table() to initialize the tables before allowing more than
- one thread to use crc32().
- */
-
-#ifdef MAKECRCH
-# include <stdio.h>
-# ifndef DYNAMIC_CRC_TABLE
-# define DYNAMIC_CRC_TABLE
-# endif /* !DYNAMIC_CRC_TABLE */
-#endif /* MAKECRCH */
-
-#include "zutil.h" /* for STDC and FAR definitions */
-
-#define local static
-
-/* Find a four-byte integer type for crc32_little() and crc32_big(). */
-#ifndef NOBYFOUR
-# ifdef STDC /* need ANSI C limits.h to determine sizes */
-# include <limits.h>
-# define BYFOUR
-# if (UINT_MAX == 0xffffffffUL)
- typedef unsigned int u4;
-# else
-# if (ULONG_MAX == 0xffffffffUL)
- typedef unsigned long u4;
-# else
-# if (USHRT_MAX == 0xffffffffUL)
- typedef unsigned short u4;
-# else
-# undef BYFOUR /* can't find a four-byte integer type! */
-# endif
-# endif
-# endif
-# endif /* STDC */
-#endif /* !NOBYFOUR */
-
-/* Definitions for doing the crc four data bytes at a time. */
-#ifdef BYFOUR
-# define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
- (((w)&0xff00)<<8)+(((w)&0xff)<<24))
- local unsigned long crc32_little OF((unsigned long,
- const unsigned char FAR *, unsigned));
- local unsigned long crc32_big OF((unsigned long,
- const unsigned char FAR *, unsigned));
-# define TBLS 8
-#else
-# define TBLS 1
-#endif /* BYFOUR */
-
-/* Local functions for crc concatenation */
-local unsigned long gf2_matrix_times OF((unsigned long *mat,
- unsigned long vec));
-local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
-
-#ifdef DYNAMIC_CRC_TABLE
-
-local volatile int crc_table_empty = 1;
-local unsigned long FAR crc_table[TBLS][256];
-local void make_crc_table OF((void));
-#ifdef MAKECRCH
- local void write_table OF((FILE *, const unsigned long FAR *));
-#endif /* MAKECRCH */
-/*
- Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
- x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
-
- Polynomials over GF(2) are represented in binary, one bit per coefficient,
- with the lowest powers in the most significant bit. Then adding polynomials
- is just exclusive-or, and multiplying a polynomial by x is a right shift by
- one. If we call the above polynomial p, and represent a byte as the
- polynomial q, also with the lowest power in the most significant bit (so the
- byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
- where a mod b means the remainder after dividing a by b.
-
- This calculation is done using the shift-register method of multiplying and
- taking the remainder. The register is initialized to zero, and for each
- incoming bit, x^32 is added mod p to the register if the bit is a one (where
- x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
- x (which is shifting right by one and adding x^32 mod p if the bit shifted
- out is a one). We start with the highest power (least significant bit) of
- q and repeat for all eight bits of q.
-
- The first table is simply the CRC of all possible eight bit values. This is
- all the information needed to generate CRCs on data a byte at a time for all
- combinations of CRC register values and incoming bytes. The remaining tables
- allow for word-at-a-time CRC calculation for both big-endian and little-
- endian machines, where a word is four bytes.
-*/
-local void make_crc_table()
-{
- unsigned long c;
- int n, k;
- unsigned long poly; /* polynomial exclusive-or pattern */
- /* terms of polynomial defining this crc (except x^32): */
- static volatile int first = 1; /* flag to limit concurrent making */
- static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
-
- /* See if another task is already doing this (not thread-safe, but better
- than nothing -- significantly reduces duration of vulnerability in
- case the advice about DYNAMIC_CRC_TABLE is ignored) */
- if (first) {
- first = 0;
-
- /* make exclusive-or pattern from polynomial (0xedb88320UL) */
- poly = 0UL;
- for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
- poly |= 1UL << (31 - p[n]);
-
- /* generate a crc for every 8-bit value */
- for (n = 0; n < 256; n++) {
- c = (unsigned long)n;
- for (k = 0; k < 8; k++)
- c = c & 1 ? poly ^ (c >> 1) : c >> 1;
- crc_table[0][n] = c;
- }
-
-#ifdef BYFOUR
- /* generate crc for each value followed by one, two, and three zeros,
- and then the byte reversal of those as well as the first table */
- for (n = 0; n < 256; n++) {
- c = crc_table[0][n];
- crc_table[4][n] = REV(c);
- for (k = 1; k < 4; k++) {
- c = crc_table[0][c & 0xff] ^ (c >> 8);
- crc_table[k][n] = c;
- crc_table[k + 4][n] = REV(c);
- }
- }
-#endif /* BYFOUR */
-
- crc_table_empty = 0;
- }
- else { /* not first */
- /* wait for the other guy to finish (not efficient, but rare) */
- while (crc_table_empty)
- ;
- }
-
-#ifdef MAKECRCH
- /* write out CRC tables to crc32.h */
- {
- FILE *out;
-
- out = fopen("crc32.h", "w");
- if (out == NULL) return;
- fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
- fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
- fprintf(out, "local const unsigned long FAR ");
- fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
- write_table(out, crc_table[0]);
-# ifdef BYFOUR
- fprintf(out, "#ifdef BYFOUR\n");
- for (k = 1; k < 8; k++) {
- fprintf(out, " },\n {\n");
- write_table(out, crc_table[k]);
- }
- fprintf(out, "#endif\n");
-# endif /* BYFOUR */
- fprintf(out, " }\n};\n");
- fclose(out);
- }
-#endif /* MAKECRCH */
-}
-
-#ifdef MAKECRCH
-local void write_table(out, table)
- FILE *out;
- const unsigned long FAR *table;
-{
- int n;
-
- for (n = 0; n < 256; n++)
- fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n],
- n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
-}
-#endif /* MAKECRCH */
-
-#else /* !DYNAMIC_CRC_TABLE */
-/* ========================================================================
- * Tables of CRC-32s of all single-byte values, made by make_crc_table().
- */
-#include "crc32.h"
-#endif /* DYNAMIC_CRC_TABLE */
-
-/* =========================================================================
- * This function can be used by asm versions of crc32()
- */
-const unsigned long FAR * ZEXPORT get_crc_table()
-{
-#ifdef DYNAMIC_CRC_TABLE
- if (crc_table_empty)
- make_crc_table();
-#endif /* DYNAMIC_CRC_TABLE */
- return (const unsigned long FAR *)crc_table;
-}
-
-/* ========================================================================= */
-#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
-#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
-
-/* ========================================================================= */
-unsigned long ZEXPORT crc32(crc, buf, len)
- unsigned long crc;
- const unsigned char FAR *buf;
- unsigned len;
-{
- if (buf == Z_NULL) return 0UL;
-
-#ifdef DYNAMIC_CRC_TABLE
- if (crc_table_empty)
- make_crc_table();
-#endif /* DYNAMIC_CRC_TABLE */
-
-#ifdef BYFOUR
- if (sizeof(void *) == sizeof(ptrdiff_t)) {
- u4 endian;
-
- endian = 1;
- if (*((unsigned char *)(&endian)))
- return crc32_little(crc, buf, len);
- else
- return crc32_big(crc, buf, len);
- }
-#endif /* BYFOUR */
- crc = crc ^ 0xffffffffUL;
- while (len >= 8) {
- DO8;
- len -= 8;
- }
- if (len) do {
- DO1;
- } while (--len);
- return crc ^ 0xffffffffUL;
-}
-
-#ifdef BYFOUR
-
-/* ========================================================================= */
-#define DOLIT4 c ^= *buf4++; \
- c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
- crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
-#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
-
-/* ========================================================================= */
-local unsigned long crc32_little(crc, buf, len)
- unsigned long crc;
- const unsigned char FAR *buf;
- unsigned len;
-{
- register u4 c;
- register const u4 FAR *buf4;
-
- c = (u4)crc;
- c = ~c;
- while (len && ((ptrdiff_t)buf & 3)) {
- c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
- len--;
- }
-
- buf4 = (const u4 FAR *)(const void FAR *)buf;
- while (len >= 32) {
- DOLIT32;
- len -= 32;
- }
- while (len >= 4) {
- DOLIT4;
- len -= 4;
- }
- buf = (const unsigned char FAR *)buf4;
-
- if (len) do {
- c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
- } while (--len);
- c = ~c;
- return (unsigned long)c;
-}
-
-/* ========================================================================= */
-#define DOBIG4 c ^= *++buf4; \
- c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
- crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
-#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
-
-/* ========================================================================= */
-local unsigned long crc32_big(crc, buf, len)
- unsigned long crc;
- const unsigned char FAR *buf;
- unsigned len;
-{
- register u4 c;
- register const u4 FAR *buf4;
-
- c = REV((u4)crc);
- c = ~c;
- while (len && ((ptrdiff_t)buf & 3)) {
- c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
- len--;
- }
-
- buf4 = (const u4 FAR *)(const void FAR *)buf;
- buf4--;
- while (len >= 32) {
- DOBIG32;
- len -= 32;
- }
- while (len >= 4) {
- DOBIG4;
- len -= 4;
- }
- buf4++;
- buf = (const unsigned char FAR *)buf4;
-
- if (len) do {
- c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
- } while (--len);
- c = ~c;
- return (unsigned long)(REV(c));
-}
-
-#endif /* BYFOUR */
-
-#define GF2_DIM 32 /* dimension of GF(2) vectors (length of CRC) */
-
-/* ========================================================================= */
-local unsigned long gf2_matrix_times(mat, vec)
- unsigned long *mat;
- unsigned long vec;
-{
- unsigned long sum;
-
- sum = 0;
- while (vec) {
- if (vec & 1)
- sum ^= *mat;
- vec >>= 1;
- mat++;
- }
- return sum;
-}
-
-/* ========================================================================= */
-local void gf2_matrix_square(square, mat)
- unsigned long *square;
- unsigned long *mat;
-{
- int n;
-
- for (n = 0; n < GF2_DIM; n++)
- square[n] = gf2_matrix_times(mat, mat[n]);
-}
-
-/* ========================================================================= */
-uLong ZEXPORT crc32_combine(crc1, crc2, len2)
- uLong crc1;
- uLong crc2;
- z_off_t len2;
-{
- int n;
- unsigned long row;
- unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */
- unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */
-
- /* degenerate case */
- if (len2 == 0)
- return crc1;
-
- /* put operator for one zero bit in odd */
- odd[0] = 0xedb88320L; /* CRC-32 polynomial */
- row = 1;
- for (n = 1; n < GF2_DIM; n++) {
- odd[n] = row;
- row <<= 1;
- }
-
- /* put operator for two zero bits in even */
- gf2_matrix_square(even, odd);
-
- /* put operator for four zero bits in odd */
- gf2_matrix_square(odd, even);
-
- /* apply len2 zeros to crc1 (first square will put the operator for one
- zero byte, eight zero bits, in even) */
- do {
- /* apply zeros operator for this bit of len2 */
- gf2_matrix_square(even, odd);
- if (len2 & 1)
- crc1 = gf2_matrix_times(even, crc1);
- len2 >>= 1;
-
- /* if no more bits set, then done */
- if (len2 == 0)
- break;
-
- /* another iteration of the loop with odd and even swapped */
- gf2_matrix_square(odd, even);
- if (len2 & 1)
- crc1 = gf2_matrix_times(odd, crc1);
- len2 >>= 1;
-
- /* if no more bits set, then done */
- } while (len2 != 0);
-
- /* return combined crc */
- crc1 ^= crc2;
- return crc1;
-}
+++ /dev/null
-/* crc32.h -- tables for rapid CRC calculation
- * Generated automatically by crc32.c
- */
-
-local const unsigned long FAR crc_table[TBLS][256] =
-{
- {
- 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
- 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
- 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
- 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
- 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
- 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
- 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
- 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
- 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
- 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
- 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
- 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
- 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
- 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
- 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
- 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
- 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
- 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
- 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
- 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
- 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
- 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
- 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
- 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
- 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
- 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
- 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
- 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
- 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
- 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
- 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
- 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
- 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
- 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
- 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
- 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
- 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
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- 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
- 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
- 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
- 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
- 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
- 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
- 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
- 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
- 0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
- 0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
- 0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
- 0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
- 0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
- 0x2d02ef8dUL
-#ifdef BYFOUR
- },
- {
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- 0x7d77f445UL, 0x565aa786UL, 0x4f4196c7UL, 0xc8d98a08UL, 0xd1c2bb49UL,
- 0xfaefe88aUL, 0xe3f4d9cbUL, 0xacb54f0cUL, 0xb5ae7e4dUL, 0x9e832d8eUL,
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- 0xd4413fdfUL, 0xcd5a0e9eUL, 0x958424a2UL, 0x8c9f15e3UL, 0xa7b24620UL,
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- 0x202a5aefUL, 0x0b07092cUL, 0x121c386dUL, 0xdf4636f3UL, 0xc65d07b2UL,
- 0xed705471UL, 0xf46b6530UL, 0xbb2af3f7UL, 0xa231c2b6UL, 0x891c9175UL,
- 0x9007a034UL, 0x179fbcfbUL, 0x0e848dbaUL, 0x25a9de79UL, 0x3cb2ef38UL,
- 0x73f379ffUL, 0x6ae848beUL, 0x41c51b7dUL, 0x58de2a3cUL, 0xf0794f05UL,
- 0xe9627e44UL, 0xc24f2d87UL, 0xdb541cc6UL, 0x94158a01UL, 0x8d0ebb40UL,
- 0xa623e883UL, 0xbf38d9c2UL, 0x38a0c50dUL, 0x21bbf44cUL, 0x0a96a78fUL,
- 0x138d96ceUL, 0x5ccc0009UL, 0x45d73148UL, 0x6efa628bUL, 0x77e153caUL,
- 0xbabb5d54UL, 0xa3a06c15UL, 0x888d3fd6UL, 0x91960e97UL, 0xded79850UL,
- 0xc7cca911UL, 0xece1fad2UL, 0xf5facb93UL, 0x7262d75cUL, 0x6b79e61dUL,
- 0x4054b5deUL, 0x594f849fUL, 0x160e1258UL, 0x0f152319UL, 0x243870daUL,
- 0x3d23419bUL, 0x65fd6ba7UL, 0x7ce65ae6UL, 0x57cb0925UL, 0x4ed03864UL,
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- 0xb43fd0eeUL, 0x9f12832dUL, 0x8609b26cUL, 0xc94824abUL, 0xd05315eaUL,
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- 0x04122a35UL, 0x4b53bcf2UL, 0x52488db3UL, 0x7965de70UL, 0x607eef31UL,
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- 0xb30ea79dUL, 0xaa1596dcUL, 0xe554001bUL, 0xfc4f315aUL, 0xd7626299UL,
- 0xce7953d8UL, 0x49e14f17UL, 0x50fa7e56UL, 0x7bd72d95UL, 0x62cc1cd4UL,
- 0x2d8d8a13UL, 0x3496bb52UL, 0x1fbbe891UL, 0x06a0d9d0UL, 0x5e7ef3ecUL,
- 0x4765c2adUL, 0x6c48916eUL, 0x7553a02fUL, 0x3a1236e8UL, 0x230907a9UL,
- 0x0824546aUL, 0x113f652bUL, 0x96a779e4UL, 0x8fbc48a5UL, 0xa4911b66UL,
- 0xbd8a2a27UL, 0xf2cbbce0UL, 0xebd08da1UL, 0xc0fdde62UL, 0xd9e6ef23UL,
- 0x14bce1bdUL, 0x0da7d0fcUL, 0x268a833fUL, 0x3f91b27eUL, 0x70d024b9UL,
- 0x69cb15f8UL, 0x42e6463bUL, 0x5bfd777aUL, 0xdc656bb5UL, 0xc57e5af4UL,
- 0xee530937UL, 0xf7483876UL, 0xb809aeb1UL, 0xa1129ff0UL, 0x8a3fcc33UL,
- 0x9324fd72UL
- },
- {
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- 0x06cbc2ebUL, 0x048d7cb2UL, 0x054f1685UL, 0x0e1351b8UL, 0x0fd13b8fUL,
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- 0x2d711cf4UL, 0x2cb376c3UL, 0x2ef5c89aUL, 0x2f37a2adUL, 0x709a8dc0UL,
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- 0xd2241a5dUL, 0xc55efe10UL, 0xc49c9427UL, 0xc6da2a7eUL, 0xc7184049UL,
- 0xc25756ccUL, 0xc3953cfbUL, 0xc1d382a2UL, 0xc011e895UL, 0xcb4dafa8UL,
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- 0x88c623b5UL, 0x839a6488UL, 0x82580ebfUL, 0x801eb0e6UL, 0x81dcdad1UL,
- 0x8493cc54UL, 0x8551a663UL, 0x8717183aUL, 0x86d5720dUL, 0xa9e2d0a0UL,
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- 0xb853f606UL, 0xb9919c31UL, 0xbcde8ab4UL, 0xbd1ce083UL, 0xbf5a5edaUL,
- 0xbe9834edUL
- },
- {
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- 0xde0506f1UL
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- 0xc6efb0a4UL, 0xa3880c1cUL, 0x1ab0db81UL, 0x7fd76739UL, 0x9178d22bUL,
- 0xf41f6e93UL, 0x03f7263bUL, 0x66909a83UL, 0x883f2f91UL, 0xed589329UL,
- 0x546044b4UL, 0x3107f80cUL, 0xdfa84d1eUL, 0xbacff1a6UL, 0xecdf92feUL,
- 0x89b82e46UL, 0x67179b54UL, 0x027027ecUL, 0xbb48f071UL, 0xde2f4cc9UL,
- 0x3080f9dbUL, 0x55e74563UL, 0x9ca03f6bUL, 0xf9c783d3UL, 0x176836c1UL,
- 0x720f8a79UL, 0xcb375de4UL, 0xae50e15cUL, 0x40ff544eUL, 0x2598e8f6UL,
- 0x73888baeUL, 0x16ef3716UL, 0xf8408204UL, 0x9d273ebcUL, 0x241fe921UL,
- 0x41785599UL, 0xafd7e08bUL, 0xcab05c33UL, 0x3bb659edUL, 0x5ed1e555UL,
- 0xb07e5047UL, 0xd519ecffUL, 0x6c213b62UL, 0x094687daUL, 0xe7e932c8UL,
- 0x828e8e70UL, 0xd49eed28UL, 0xb1f95190UL, 0x5f56e482UL, 0x3a31583aUL,
- 0x83098fa7UL, 0xe66e331fUL, 0x08c1860dUL, 0x6da63ab5UL, 0xa4e140bdUL,
- 0xc186fc05UL, 0x2f294917UL, 0x4a4ef5afUL, 0xf3762232UL, 0x96119e8aUL,
- 0x78be2b98UL, 0x1dd99720UL, 0x4bc9f478UL, 0x2eae48c0UL, 0xc001fdd2UL,
- 0xa566416aUL, 0x1c5e96f7UL, 0x79392a4fUL, 0x97969f5dUL, 0xf2f123e5UL,
- 0x05196b4dUL, 0x607ed7f5UL, 0x8ed162e7UL, 0xebb6de5fUL, 0x528e09c2UL,
- 0x37e9b57aUL, 0xd9460068UL, 0xbc21bcd0UL, 0xea31df88UL, 0x8f566330UL,
- 0x61f9d622UL, 0x049e6a9aUL, 0xbda6bd07UL, 0xd8c101bfUL, 0x366eb4adUL,
- 0x53090815UL, 0x9a4e721dUL, 0xff29cea5UL, 0x11867bb7UL, 0x74e1c70fUL,
- 0xcdd91092UL, 0xa8beac2aUL, 0x46111938UL, 0x2376a580UL, 0x7566c6d8UL,
- 0x10017a60UL, 0xfeaecf72UL, 0x9bc973caUL, 0x22f1a457UL, 0x479618efUL,
- 0xa939adfdUL, 0xcc5e1145UL, 0x06ee4d76UL, 0x6389f1ceUL, 0x8d2644dcUL,
- 0xe841f864UL, 0x51792ff9UL, 0x341e9341UL, 0xdab12653UL, 0xbfd69aebUL,
- 0xe9c6f9b3UL, 0x8ca1450bUL, 0x620ef019UL, 0x07694ca1UL, 0xbe519b3cUL,
- 0xdb362784UL, 0x35999296UL, 0x50fe2e2eUL, 0x99b95426UL, 0xfcdee89eUL,
- 0x12715d8cUL, 0x7716e134UL, 0xce2e36a9UL, 0xab498a11UL, 0x45e63f03UL,
- 0x208183bbUL, 0x7691e0e3UL, 0x13f65c5bUL, 0xfd59e949UL, 0x983e55f1UL,
- 0x2106826cUL, 0x44613ed4UL, 0xaace8bc6UL, 0xcfa9377eUL, 0x38417fd6UL,
- 0x5d26c36eUL, 0xb389767cUL, 0xd6eecac4UL, 0x6fd61d59UL, 0x0ab1a1e1UL,
- 0xe41e14f3UL, 0x8179a84bUL, 0xd769cb13UL, 0xb20e77abUL, 0x5ca1c2b9UL,
- 0x39c67e01UL, 0x80fea99cUL, 0xe5991524UL, 0x0b36a036UL, 0x6e511c8eUL,
- 0xa7166686UL, 0xc271da3eUL, 0x2cde6f2cUL, 0x49b9d394UL, 0xf0810409UL,
- 0x95e6b8b1UL, 0x7b490da3UL, 0x1e2eb11bUL, 0x483ed243UL, 0x2d596efbUL,
- 0xc3f6dbe9UL, 0xa6916751UL, 0x1fa9b0ccUL, 0x7ace0c74UL, 0x9461b966UL,
- 0xf10605deUL
-#endif
- }
-};
+++ /dev/null
-/* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2005 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- * ALGORITHM
- *
- * The "deflation" process depends on being able to identify portions
- * of the input text which are identical to earlier input (within a
- * sliding window trailing behind the input currently being processed).
- *
- * The most straightforward technique turns out to be the fastest for
- * most input files: try all possible matches and select the longest.
- * The key feature of this algorithm is that insertions into the string
- * dictionary are very simple and thus fast, and deletions are avoided
- * completely. Insertions are performed at each input character, whereas
- * string matches are performed only when the previous match ends. So it
- * is preferable to spend more time in matches to allow very fast string
- * insertions and avoid deletions. The matching algorithm for small
- * strings is inspired from that of Rabin & Karp. A brute force approach
- * is used to find longer strings when a small match has been found.
- * A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
- * (by Leonid Broukhis).
- * A previous version of this file used a more sophisticated algorithm
- * (by Fiala and Greene) which is guaranteed to run in linear amortized
- * time, but has a larger average cost, uses more memory and is patented.
- * However the F&G algorithm may be faster for some highly redundant
- * files if the parameter max_chain_length (described below) is too large.
- *
- * ACKNOWLEDGEMENTS
- *
- * The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
- * I found it in 'freeze' written by Leonid Broukhis.
- * Thanks to many people for bug reports and testing.
- *
- * REFERENCES
- *
- * Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
- * Available in http://www.ietf.org/rfc/rfc1951.txt
- *
- * A description of the Rabin and Karp algorithm is given in the book
- * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
- *
- * Fiala,E.R., and Greene,D.H.
- * Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
- *
- */
-
-/* @(#) $Id$ */
-
-#include "deflate.h"
-
-const char deflate_copyright[] =
- " deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly ";
-/*
- If you use the zlib library in a product, an acknowledgment is welcome
- in the documentation of your product. If for some reason you cannot
- include such an acknowledgment, I would appreciate that you keep this
- copyright string in the executable of your product.
- */
-
-/* ===========================================================================
- * Function prototypes.
- */
-typedef enum {
- need_more, /* block not completed, need more input or more output */
- block_done, /* block flush performed */
- finish_started, /* finish started, need only more output at next deflate */
- finish_done /* finish done, accept no more input or output */
-} block_state;
-
-typedef block_state (*compress_func) OF((deflate_state *s, int flush));
-/* Compression function. Returns the block state after the call. */
-
-local void fill_window OF((deflate_state *s));
-local block_state deflate_stored OF((deflate_state *s, int flush));
-local block_state deflate_fast OF((deflate_state *s, int flush));
-#ifndef FASTEST
-local block_state deflate_slow OF((deflate_state *s, int flush));
-#endif
-local void lm_init OF((deflate_state *s));
-local void putShortMSB OF((deflate_state *s, uInt b));
-local void flush_pending OF((z_streamp strm));
-local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
-#ifndef FASTEST
-#ifdef ASMV
- void match_init OF((void)); /* asm code initialization */
- uInt longest_match OF((deflate_state *s, IPos cur_match));
-#else
-local uInt longest_match OF((deflate_state *s, IPos cur_match));
-#endif
-#endif
-local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));
-
-#ifdef DEBUG
-local void check_match OF((deflate_state *s, IPos start, IPos match,
- int length));
-#endif
-
-/* ===========================================================================
- * Local data
- */
-
-#define NIL 0
-/* Tail of hash chains */
-
-#ifndef TOO_FAR
-# define TOO_FAR 4096
-#endif
-/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
-
-#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
-/* Minimum amount of lookahead, except at the end of the input file.
- * See deflate.c for comments about the MIN_MATCH+1.
- */
-
-/* Values for max_lazy_match, good_match and max_chain_length, depending on
- * the desired pack level (0..9). The values given below have been tuned to
- * exclude worst case performance for pathological files. Better values may be
- * found for specific files.
- */
-typedef struct config_s {
- ush good_length; /* reduce lazy search above this match length */
- ush max_lazy; /* do not perform lazy search above this match length */
- ush nice_length; /* quit search above this match length */
- ush max_chain;
- compress_func func;
-} config;
-
-#ifdef FASTEST
-local const config configuration_table[2] = {
-/* good lazy nice chain */
-/* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */
-/* 1 */ {4, 4, 8, 4, deflate_fast}}; /* max speed, no lazy matches */
-#else
-local const config configuration_table[10] = {
-/* good lazy nice chain */
-/* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */
-/* 1 */ {4, 4, 8, 4, deflate_fast}, /* max speed, no lazy matches */
-/* 2 */ {4, 5, 16, 8, deflate_fast},
-/* 3 */ {4, 6, 32, 32, deflate_fast},
-
-/* 4 */ {4, 4, 16, 16, deflate_slow}, /* lazy matches */
-/* 5 */ {8, 16, 32, 32, deflate_slow},
-/* 6 */ {8, 16, 128, 128, deflate_slow},
-/* 7 */ {8, 32, 128, 256, deflate_slow},
-/* 8 */ {32, 128, 258, 1024, deflate_slow},
-/* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* max compression */
-#endif
-
-/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
- * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
- * meaning.
- */
-
-#define EQUAL 0
-/* result of memcmp for equal strings */
-
-#ifndef NO_DUMMY_DECL
-struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
-#endif
-
-/* ===========================================================================
- * Update a hash value with the given input byte
- * IN assertion: all calls to to UPDATE_HASH are made with consecutive
- * input characters, so that a running hash key can be computed from the
- * previous key instead of complete recalculation each time.
- */
-#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
-
-
-/* ===========================================================================
- * Insert string str in the dictionary and set match_head to the previous head
- * of the hash chain (the most recent string with same hash key). Return
- * the previous length of the hash chain.
- * If this file is compiled with -DFASTEST, the compression level is forced
- * to 1, and no hash chains are maintained.
- * IN assertion: all calls to to INSERT_STRING are made with consecutive
- * input characters and the first MIN_MATCH bytes of str are valid
- * (except for the last MIN_MATCH-1 bytes of the input file).
- */
-#ifdef FASTEST
-#define INSERT_STRING(s, str, match_head) \
- (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
- match_head = s->head[s->ins_h], \
- s->head[s->ins_h] = (Pos)(str))
-#else
-#define INSERT_STRING(s, str, match_head) \
- (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
- match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \
- s->head[s->ins_h] = (Pos)(str))
-#endif
-
-/* ===========================================================================
- * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
- * prev[] will be initialized on the fly.
- */
-#define CLEAR_HASH(s) \
- s->head[s->hash_size-1] = NIL; \
- zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
-
-/* ========================================================================= */
-int ZEXPORT deflateInit_(strm, level, version, stream_size)
- z_streamp strm;
- int level;
- const char *version;
- int stream_size;
-{
- return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
- Z_DEFAULT_STRATEGY, version, stream_size);
- /* To do: ignore strm->next_in if we use it as window */
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
- version, stream_size)
- z_streamp strm;
- int level;
- int method;
- int windowBits;
- int memLevel;
- int strategy;
- const char *version;
- int stream_size;
-{
- deflate_state *s;
- int wrap = 1;
- static const char my_version[] = ZLIB_VERSION;
-
- ushf *overlay;
- /* We overlay pending_buf and d_buf+l_buf. This works since the average
- * output size for (length,distance) codes is <= 24 bits.
- */
-
- if (version == Z_NULL || version[0] != my_version[0] ||
- stream_size != sizeof(z_stream)) {
- return Z_VERSION_ERROR;
- }
- if (strm == Z_NULL) return Z_STREAM_ERROR;
-
- strm->msg = Z_NULL;
- if (strm->zalloc == (alloc_func)0) {
- strm->zalloc = zcalloc;
- strm->opaque = (voidpf)0;
- }
- if (strm->zfree == (free_func)0) strm->zfree = zcfree;
-
-#ifdef FASTEST
- if (level != 0) level = 1;
-#else
- if (level == Z_DEFAULT_COMPRESSION) level = 6;
-#endif
-
- if (windowBits < 0) { /* suppress zlib wrapper */
- wrap = 0;
- windowBits = -windowBits;
- }
-#ifdef GZIP
- else if (windowBits > 15) {
- wrap = 2; /* write gzip wrapper instead */
- windowBits -= 16;
- }
-#endif
- if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
- windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
- strategy < 0 || strategy > Z_FIXED) {
- return Z_STREAM_ERROR;
- }
- if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */
- s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
- if (s == Z_NULL) return Z_MEM_ERROR;
- strm->state = (struct internal_state FAR *)s;
- s->strm = strm;
-
- s->wrap = wrap;
- s->gzhead = Z_NULL;
- s->w_bits = windowBits;
- s->w_size = 1 << s->w_bits;
- s->w_mask = s->w_size - 1;
-
- s->hash_bits = memLevel + 7;
- s->hash_size = 1 << s->hash_bits;
- s->hash_mask = s->hash_size - 1;
- s->hash_shift = ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
-
- s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte));
- s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));
- s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));
-
- s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
-
- overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
- s->pending_buf = (uchf *) overlay;
- s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
-
- if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
- s->pending_buf == Z_NULL) {
- s->status = FINISH_STATE;
- strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
- deflateEnd (strm);
- return Z_MEM_ERROR;
- }
- s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
- s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
-
- s->level = level;
- s->strategy = strategy;
- s->method = (Byte)method;
-
- return deflateReset(strm);
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
- z_streamp strm;
- const Bytef *dictionary;
- uInt dictLength;
-{
- deflate_state *s;
- uInt length = dictLength;
- uInt n;
- IPos hash_head = 0;
-
- if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
- strm->state->wrap == 2 ||
- (strm->state->wrap == 1 && strm->state->status != INIT_STATE))
- return Z_STREAM_ERROR;
-
- s = strm->state;
- if (s->wrap)
- strm->adler = adler32(strm->adler, dictionary, dictLength);
-
- if (length < MIN_MATCH) return Z_OK;
- if (length > MAX_DIST(s)) {
- length = MAX_DIST(s);
- dictionary += dictLength - length; /* use the tail of the dictionary */
- }
- zmemcpy(s->window, dictionary, length);
- s->strstart = length;
- s->block_start = (long)length;
-
- /* Insert all strings in the hash table (except for the last two bytes).
- * s->lookahead stays null, so s->ins_h will be recomputed at the next
- * call of fill_window.
- */
- s->ins_h = s->window[0];
- UPDATE_HASH(s, s->ins_h, s->window[1]);
- for (n = 0; n <= length - MIN_MATCH; n++) {
- INSERT_STRING(s, n, hash_head);
- }
- if (hash_head) hash_head = 0; /* to make compiler happy */
- return Z_OK;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateReset (strm)
- z_streamp strm;
-{
- deflate_state *s;
-
- if (strm == Z_NULL || strm->state == Z_NULL ||
- strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0) {
- return Z_STREAM_ERROR;
- }
-
- strm->total_in = strm->total_out = 0;
- strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */
- strm->data_type = Z_UNKNOWN;
-
- s = (deflate_state *)strm->state;
- s->pending = 0;
- s->pending_out = s->pending_buf;
-
- if (s->wrap < 0) {
- s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */
- }
- s->status = s->wrap ? INIT_STATE : BUSY_STATE;
- strm->adler =
-#ifdef GZIP
- s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
-#endif
- adler32(0L, Z_NULL, 0);
- s->last_flush = Z_NO_FLUSH;
-
- _tr_init(s);
- lm_init(s);
-
- return Z_OK;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateSetHeader (strm, head)
- z_streamp strm;
- gz_headerp head;
-{
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- if (strm->state->wrap != 2) return Z_STREAM_ERROR;
- strm->state->gzhead = head;
- return Z_OK;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflatePrime (strm, bits, value)
- z_streamp strm;
- int bits;
- int value;
-{
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- strm->state->bi_valid = bits;
- strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
- return Z_OK;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateParams(strm, level, strategy)
- z_streamp strm;
- int level;
- int strategy;
-{
- deflate_state *s;
- compress_func func;
- int err = Z_OK;
-
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- s = strm->state;
-
-#ifdef FASTEST
- if (level != 0) level = 1;
-#else
- if (level == Z_DEFAULT_COMPRESSION) level = 6;
-#endif
- if (level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) {
- return Z_STREAM_ERROR;
- }
- func = configuration_table[s->level].func;
-
- if (func != configuration_table[level].func && strm->total_in != 0) {
- /* Flush the last buffer: */
- err = deflate(strm, Z_PARTIAL_FLUSH);
- }
- if (s->level != level) {
- s->level = level;
- s->max_lazy_match = configuration_table[level].max_lazy;
- s->good_match = configuration_table[level].good_length;
- s->nice_match = configuration_table[level].nice_length;
- s->max_chain_length = configuration_table[level].max_chain;
- }
- s->strategy = strategy;
- return err;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
- z_streamp strm;
- int good_length;
- int max_lazy;
- int nice_length;
- int max_chain;
-{
- deflate_state *s;
-
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- s = strm->state;
- s->good_match = good_length;
- s->max_lazy_match = max_lazy;
- s->nice_match = nice_length;
- s->max_chain_length = max_chain;
- return Z_OK;
-}
-
-/* =========================================================================
- * For the default windowBits of 15 and memLevel of 8, this function returns
- * a close to exact, as well as small, upper bound on the compressed size.
- * They are coded as constants here for a reason--if the #define's are
- * changed, then this function needs to be changed as well. The return
- * value for 15 and 8 only works for those exact settings.
- *
- * For any setting other than those defaults for windowBits and memLevel,
- * the value returned is a conservative worst case for the maximum expansion
- * resulting from using fixed blocks instead of stored blocks, which deflate
- * can emit on compressed data for some combinations of the parameters.
- *
- * This function could be more sophisticated to provide closer upper bounds
- * for every combination of windowBits and memLevel, as well as wrap.
- * But even the conservative upper bound of about 14% expansion does not
- * seem onerous for output buffer allocation.
- */
-uLong ZEXPORT deflateBound(strm, sourceLen)
- z_streamp strm;
- uLong sourceLen;
-{
- deflate_state *s;
- uLong destLen;
-
- /* conservative upper bound */
- destLen = sourceLen +
- ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
-
- /* if can't get parameters, return conservative bound */
- if (strm == Z_NULL || strm->state == Z_NULL)
- return destLen;
-
- /* if not default parameters, return conservative bound */
- s = strm->state;
- if (s->w_bits != 15 || s->hash_bits != 8 + 7)
- return destLen;
-
- /* default settings: return tight bound for that case */
- return compressBound(sourceLen);
-}
-
-/* =========================================================================
- * Put a short in the pending buffer. The 16-bit value is put in MSB order.
- * IN assertion: the stream state is correct and there is enough room in
- * pending_buf.
- */
-local void putShortMSB (s, b)
- deflate_state *s;
- uInt b;
-{
- put_byte(s, (Byte)(b >> 8));
- put_byte(s, (Byte)(b & 0xff));
-}
-
-/* =========================================================================
- * Flush as much pending output as possible. All deflate() output goes
- * through this function so some applications may wish to modify it
- * to avoid allocating a large strm->next_out buffer and copying into it.
- * (See also read_buf()).
- */
-local void flush_pending(strm)
- z_streamp strm;
-{
- unsigned len = strm->state->pending;
-
- if (len > strm->avail_out) len = strm->avail_out;
- if (len == 0) return;
-
- zmemcpy(strm->next_out, strm->state->pending_out, len);
- strm->next_out += len;
- strm->state->pending_out += len;
- strm->total_out += len;
- strm->avail_out -= len;
- strm->state->pending -= len;
- if (strm->state->pending == 0) {
- strm->state->pending_out = strm->state->pending_buf;
- }
-}
-
-/* ========================================================================= */
-int ZEXPORT deflate (strm, flush)
- z_streamp strm;
- int flush;
-{
- int old_flush; /* value of flush param for previous deflate call */
- deflate_state *s;
-
- if (strm == Z_NULL || strm->state == Z_NULL ||
- flush > Z_FINISH || flush < 0) {
- return Z_STREAM_ERROR;
- }
- s = strm->state;
-
- if (strm->next_out == Z_NULL ||
- (strm->next_in == Z_NULL && strm->avail_in != 0) ||
- (s->status == FINISH_STATE && flush != Z_FINISH)) {
- ERR_RETURN(strm, Z_STREAM_ERROR);
- }
- if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
-
- s->strm = strm; /* just in case */
- old_flush = s->last_flush;
- s->last_flush = flush;
-
- /* Write the header */
- if (s->status == INIT_STATE) {
-#ifdef GZIP
- if (s->wrap == 2) {
- strm->adler = crc32(0L, Z_NULL, 0);
- put_byte(s, 31);
- put_byte(s, 139);
- put_byte(s, 8);
- if (s->gzhead == NULL) {
- put_byte(s, 0);
- put_byte(s, 0);
- put_byte(s, 0);
- put_byte(s, 0);
- put_byte(s, 0);
- put_byte(s, s->level == 9 ? 2 :
- (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
- 4 : 0));
- put_byte(s, OS_CODE);
- s->status = BUSY_STATE;
- }
- else {
- put_byte(s, (s->gzhead->text ? 1 : 0) +
- (s->gzhead->hcrc ? 2 : 0) +
- (s->gzhead->extra == Z_NULL ? 0 : 4) +
- (s->gzhead->name == Z_NULL ? 0 : 8) +
- (s->gzhead->comment == Z_NULL ? 0 : 16)
- );
- put_byte(s, (Byte)(s->gzhead->time & 0xff));
- put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff));
- put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff));
- put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff));
- put_byte(s, s->level == 9 ? 2 :
- (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
- 4 : 0));
- put_byte(s, s->gzhead->os & 0xff);
- if (s->gzhead->extra != NULL) {
- put_byte(s, s->gzhead->extra_len & 0xff);
- put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
- }
- if (s->gzhead->hcrc)
- strm->adler = crc32(strm->adler, s->pending_buf,
- s->pending);
- s->gzindex = 0;
- s->status = EXTRA_STATE;
- }
- }
- else
-#endif
- {
- uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
- uInt level_flags;
-
- if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)
- level_flags = 0;
- else if (s->level < 6)
- level_flags = 1;
- else if (s->level == 6)
- level_flags = 2;
- else
- level_flags = 3;
- header |= (level_flags << 6);
- if (s->strstart != 0) header |= PRESET_DICT;
- header += 31 - (header % 31);
-
- s->status = BUSY_STATE;
- putShortMSB(s, header);
-
- /* Save the adler32 of the preset dictionary: */
- if (s->strstart != 0) {
- putShortMSB(s, (uInt)(strm->adler >> 16));
- putShortMSB(s, (uInt)(strm->adler & 0xffff));
- }
- strm->adler = adler32(0L, Z_NULL, 0);
- }
- }
-#ifdef GZIP
- if (s->status == EXTRA_STATE) {
- if (s->gzhead->extra != NULL) {
- uInt beg = s->pending; /* start of bytes to update crc */
-
- while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
- if (s->pending == s->pending_buf_size) {
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- flush_pending(strm);
- beg = s->pending;
- if (s->pending == s->pending_buf_size)
- break;
- }
- put_byte(s, s->gzhead->extra[s->gzindex]);
- s->gzindex++;
- }
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- if (s->gzindex == s->gzhead->extra_len) {
- s->gzindex = 0;
- s->status = NAME_STATE;
- }
- }
- else
- s->status = NAME_STATE;
- }
- if (s->status == NAME_STATE) {
- if (s->gzhead->name != NULL) {
- uInt beg = s->pending; /* start of bytes to update crc */
- int val;
-
- do {
- if (s->pending == s->pending_buf_size) {
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- flush_pending(strm);
- beg = s->pending;
- if (s->pending == s->pending_buf_size) {
- val = 1;
- break;
- }
- }
- val = s->gzhead->name[s->gzindex++];
- put_byte(s, val);
- } while (val != 0);
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- if (val == 0) {
- s->gzindex = 0;
- s->status = COMMENT_STATE;
- }
- }
- else
- s->status = COMMENT_STATE;
- }
- if (s->status == COMMENT_STATE) {
- if (s->gzhead->comment != NULL) {
- uInt beg = s->pending; /* start of bytes to update crc */
- int val;
-
- do {
- if (s->pending == s->pending_buf_size) {
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- flush_pending(strm);
- beg = s->pending;
- if (s->pending == s->pending_buf_size) {
- val = 1;
- break;
- }
- }
- val = s->gzhead->comment[s->gzindex++];
- put_byte(s, val);
- } while (val != 0);
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- if (val == 0)
- s->status = HCRC_STATE;
- }
- else
- s->status = HCRC_STATE;
- }
- if (s->status == HCRC_STATE) {
- if (s->gzhead->hcrc) {
- if (s->pending + 2 > s->pending_buf_size)
- flush_pending(strm);
- if (s->pending + 2 <= s->pending_buf_size) {
- put_byte(s, (Byte)(strm->adler & 0xff));
- put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
- strm->adler = crc32(0L, Z_NULL, 0);
- s->status = BUSY_STATE;
- }
- }
- else
- s->status = BUSY_STATE;
- }
-#endif
-
- /* Flush as much pending output as possible */
- if (s->pending != 0) {
- flush_pending(strm);
- if (strm->avail_out == 0) {
- /* Since avail_out is 0, deflate will be called again with
- * more output space, but possibly with both pending and
- * avail_in equal to zero. There won't be anything to do,
- * but this is not an error situation so make sure we
- * return OK instead of BUF_ERROR at next call of deflate:
- */
- s->last_flush = -1;
- return Z_OK;
- }
-
- /* Make sure there is something to do and avoid duplicate consecutive
- * flushes. For repeated and useless calls with Z_FINISH, we keep
- * returning Z_STREAM_END instead of Z_BUF_ERROR.
- */
- } else if (strm->avail_in == 0 && flush <= old_flush &&
- flush != Z_FINISH) {
- ERR_RETURN(strm, Z_BUF_ERROR);
- }
-
- /* User must not provide more input after the first FINISH: */
- if (s->status == FINISH_STATE && strm->avail_in != 0) {
- ERR_RETURN(strm, Z_BUF_ERROR);
- }
-
- /* Start a new block or continue the current one.
- */
- if (strm->avail_in != 0 || s->lookahead != 0 ||
- (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
- block_state bstate;
-
- bstate = (*(configuration_table[s->level].func))(s, flush);
-
- if (bstate == finish_started || bstate == finish_done) {
- s->status = FINISH_STATE;
- }
- if (bstate == need_more || bstate == finish_started) {
- if (strm->avail_out == 0) {
- s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
- }
- return Z_OK;
- /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
- * of deflate should use the same flush parameter to make sure
- * that the flush is complete. So we don't have to output an
- * empty block here, this will be done at next call. This also
- * ensures that for a very small output buffer, we emit at most
- * one empty block.
- */
- }
- if (bstate == block_done) {
- if (flush == Z_PARTIAL_FLUSH) {
- _tr_align(s);
- } else { /* FULL_FLUSH or SYNC_FLUSH */
- _tr_stored_block(s, (char*)0, 0L, 0);
- /* For a full flush, this empty block will be recognized
- * as a special marker by inflate_sync().
- */
- if (flush == Z_FULL_FLUSH) {
- CLEAR_HASH(s); /* forget history */
- }
- }
- flush_pending(strm);
- if (strm->avail_out == 0) {
- s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
- return Z_OK;
- }
- }
- }
- Assert(strm->avail_out > 0, "bug2");
-
- if (flush != Z_FINISH) return Z_OK;
- if (s->wrap <= 0) return Z_STREAM_END;
-
- /* Write the trailer */
-#ifdef GZIP
- if (s->wrap == 2) {
- put_byte(s, (Byte)(strm->adler & 0xff));
- put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
- put_byte(s, (Byte)((strm->adler >> 16) & 0xff));
- put_byte(s, (Byte)((strm->adler >> 24) & 0xff));
- put_byte(s, (Byte)(strm->total_in & 0xff));
- put_byte(s, (Byte)((strm->total_in >> 8) & 0xff));
- put_byte(s, (Byte)((strm->total_in >> 16) & 0xff));
- put_byte(s, (Byte)((strm->total_in >> 24) & 0xff));
- }
- else
-#endif
- {
- putShortMSB(s, (uInt)(strm->adler >> 16));
- putShortMSB(s, (uInt)(strm->adler & 0xffff));
- }
- flush_pending(strm);
- /* If avail_out is zero, the application will call deflate again
- * to flush the rest.
- */
- if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */
- return s->pending != 0 ? Z_OK : Z_STREAM_END;
-}
-
-/* ========================================================================= */
-int ZEXPORT deflateEnd (strm)
- z_streamp strm;
-{
- int status;
-
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-
- status = strm->state->status;
- if (status != INIT_STATE &&
- status != EXTRA_STATE &&
- status != NAME_STATE &&
- status != COMMENT_STATE &&
- status != HCRC_STATE &&
- status != BUSY_STATE &&
- status != FINISH_STATE) {
- return Z_STREAM_ERROR;
- }
-
- /* Deallocate in reverse order of allocations: */
- TRY_FREE(strm, strm->state->pending_buf);
- TRY_FREE(strm, strm->state->head);
- TRY_FREE(strm, strm->state->prev);
- TRY_FREE(strm, strm->state->window);
-
- ZFREE(strm, strm->state);
- strm->state = Z_NULL;
-
- return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;
-}
-
-/* =========================================================================
- * Copy the source state to the destination state.
- * To simplify the source, this is not supported for 16-bit MSDOS (which
- * doesn't have enough memory anyway to duplicate compression states).
- */
-int ZEXPORT deflateCopy (dest, source)
- z_streamp dest;
- z_streamp source;
-{
-#ifdef MAXSEG_64K
- return Z_STREAM_ERROR;
-#else
- deflate_state *ds;
- deflate_state *ss;
- ushf *overlay;
-
-
- if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
- return Z_STREAM_ERROR;
- }
-
- ss = source->state;
-
- zmemcpy(dest, source, sizeof(z_stream));
-
- ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
- if (ds == Z_NULL) return Z_MEM_ERROR;
- dest->state = (struct internal_state FAR *) ds;
- zmemcpy(ds, ss, sizeof(deflate_state));
- ds->strm = dest;
-
- ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
- ds->prev = (Posf *) ZALLOC(dest, ds->w_size, sizeof(Pos));
- ds->head = (Posf *) ZALLOC(dest, ds->hash_size, sizeof(Pos));
- overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
- ds->pending_buf = (uchf *) overlay;
-
- if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
- ds->pending_buf == Z_NULL) {
- deflateEnd (dest);
- return Z_MEM_ERROR;
- }
- /* following zmemcpy do not work for 16-bit MSDOS */
- zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
- zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos));
- zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos));
- zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
-
- ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
- ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
- ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
-
- ds->l_desc.dyn_tree = ds->dyn_ltree;
- ds->d_desc.dyn_tree = ds->dyn_dtree;
- ds->bl_desc.dyn_tree = ds->bl_tree;
-
- return Z_OK;
-#endif /* MAXSEG_64K */
-}
-
-/* ===========================================================================
- * Read a new buffer from the current input stream, update the adler32
- * and total number of bytes read. All deflate() input goes through
- * this function so some applications may wish to modify it to avoid
- * allocating a large strm->next_in buffer and copying from it.
- * (See also flush_pending()).
- */
-local int read_buf(strm, buf, size)
- z_streamp strm;
- Bytef *buf;
- unsigned size;
-{
- unsigned len = strm->avail_in;
-
- if (len > size) len = size;
- if (len == 0) return 0;
-
- strm->avail_in -= len;
-
- if (strm->state->wrap == 1) {
- strm->adler = adler32(strm->adler, strm->next_in, len);
- }
-#ifdef GZIP
- else if (strm->state->wrap == 2) {
- strm->adler = crc32(strm->adler, strm->next_in, len);
- }
-#endif
- zmemcpy(buf, strm->next_in, len);
- strm->next_in += len;
- strm->total_in += len;
-
- return (int)len;
-}
-
-/* ===========================================================================
- * Initialize the "longest match" routines for a new zlib stream
- */
-local void lm_init (s)
- deflate_state *s;
-{
- s->window_size = (ulg)2L*s->w_size;
-
- CLEAR_HASH(s);
-
- /* Set the default configuration parameters:
- */
- s->max_lazy_match = configuration_table[s->level].max_lazy;
- s->good_match = configuration_table[s->level].good_length;
- s->nice_match = configuration_table[s->level].nice_length;
- s->max_chain_length = configuration_table[s->level].max_chain;
-
- s->strstart = 0;
- s->block_start = 0L;
- s->lookahead = 0;
- s->match_length = s->prev_length = MIN_MATCH-1;
- s->match_available = 0;
- s->ins_h = 0;
-#ifndef FASTEST
-#ifdef ASMV
- match_init(); /* initialize the asm code */
-#endif
-#endif
-}
-
-#ifndef FASTEST
-/* ===========================================================================
- * Set match_start to the longest match starting at the given string and
- * return its length. Matches shorter or equal to prev_length are discarded,
- * in which case the result is equal to prev_length and match_start is
- * garbage.
- * IN assertions: cur_match is the head of the hash chain for the current
- * string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
- * OUT assertion: the match length is not greater than s->lookahead.
- */
-#ifndef ASMV
-/* For 80x86 and 680x0, an optimized version will be provided in match.asm or
- * match.S. The code will be functionally equivalent.
- */
-local uInt longest_match(s, cur_match)
- deflate_state *s;
- IPos cur_match; /* current match */
-{
- unsigned chain_length = s->max_chain_length;/* max hash chain length */
- register Bytef *scan = s->window + s->strstart; /* current string */
- register Bytef *match; /* matched string */
- register int len; /* length of current match */
- int best_len = s->prev_length; /* best match length so far */
- int nice_match = s->nice_match; /* stop if match long enough */
- IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
- s->strstart - (IPos)MAX_DIST(s) : NIL;
- /* Stop when cur_match becomes <= limit. To simplify the code,
- * we prevent matches with the string of window index 0.
- */
- Posf *prev = s->prev;
- uInt wmask = s->w_mask;
-
-#ifdef UNALIGNED_OK
- /* Compare two bytes at a time. Note: this is not always beneficial.
- * Try with and without -DUNALIGNED_OK to check.
- */
- register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;
- register ush scan_start = *(ushf*)scan;
- register ush scan_end = *(ushf*)(scan+best_len-1);
-#else
- register Bytef *strend = s->window + s->strstart + MAX_MATCH;
- register Byte scan_end1 = scan[best_len-1];
- register Byte scan_end = scan[best_len];
-#endif
-
- /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
- * It is easy to get rid of this optimization if necessary.
- */
- Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
-
- /* Do not waste too much time if we already have a good match: */
- if (s->prev_length >= s->good_match) {
- chain_length >>= 2;
- }
- /* Do not look for matches beyond the end of the input. This is necessary
- * to make deflate deterministic.
- */
- if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
-
- Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
-
- do {
- Assert(cur_match < s->strstart, "no future");
- match = s->window + cur_match;
-
- /* Skip to next match if the match length cannot increase
- * or if the match length is less than 2. Note that the checks below
- * for insufficient lookahead only occur occasionally for performance
- * reasons. Therefore uninitialized memory will be accessed, and
- * conditional jumps will be made that depend on those values.
- * However the length of the match is limited to the lookahead, so
- * the output of deflate is not affected by the uninitialized values.
- */
-#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
- /* This code assumes sizeof(unsigned short) == 2. Do not use
- * UNALIGNED_OK if your compiler uses a different size.
- */
- if (*(ushf*)(match+best_len-1) != scan_end ||
- *(ushf*)match != scan_start) continue;
-
- /* It is not necessary to compare scan[2] and match[2] since they are
- * always equal when the other bytes match, given that the hash keys
- * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
- * strstart+3, +5, ... up to strstart+257. We check for insufficient
- * lookahead only every 4th comparison; the 128th check will be made
- * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is
- * necessary to put more guard bytes at the end of the window, or
- * to check more often for insufficient lookahead.
- */
- Assert(scan[2] == match[2], "scan[2]?");
- scan++, match++;
- do {
- } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
- *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
- *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
- *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
- scan < strend);
- /* The funny "do {}" generates better code on most compilers */
-
- /* Here, scan <= window+strstart+257 */
- Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
- if (*scan == *match) scan++;
-
- len = (MAX_MATCH - 1) - (int)(strend-scan);
- scan = strend - (MAX_MATCH-1);
-
-#else /* UNALIGNED_OK */
-
- if (match[best_len] != scan_end ||
- match[best_len-1] != scan_end1 ||
- *match != *scan ||
- *++match != scan[1]) continue;
-
- /* The check at best_len-1 can be removed because it will be made
- * again later. (This heuristic is not always a win.)
- * It is not necessary to compare scan[2] and match[2] since they
- * are always equal when the other bytes match, given that
- * the hash keys are equal and that HASH_BITS >= 8.
- */
- scan += 2, match++;
- Assert(*scan == *match, "match[2]?");
-
- /* We check for insufficient lookahead only every 8th comparison;
- * the 256th check will be made at strstart+258.
- */
- do {
- } while (*++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- scan < strend);
-
- Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
-
- len = MAX_MATCH - (int)(strend - scan);
- scan = strend - MAX_MATCH;
-
-#endif /* UNALIGNED_OK */
-
- if (len > best_len) {
- s->match_start = cur_match;
- best_len = len;
- if (len >= nice_match) break;
-#ifdef UNALIGNED_OK
- scan_end = *(ushf*)(scan+best_len-1);
-#else
- scan_end1 = scan[best_len-1];
- scan_end = scan[best_len];
-#endif
- }
- } while ((cur_match = prev[cur_match & wmask]) > limit
- && --chain_length != 0);
-
- if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
- return s->lookahead;
-}
-#endif /* ASMV */
-#endif /* FASTEST */
-
-/* ---------------------------------------------------------------------------
- * Optimized version for level == 1 or strategy == Z_RLE only
- */
-local uInt longest_match_fast(s, cur_match)
- deflate_state *s;
- IPos cur_match; /* current match */
-{
- register Bytef *scan = s->window + s->strstart; /* current string */
- register Bytef *match; /* matched string */
- register int len; /* length of current match */
- register Bytef *strend = s->window + s->strstart + MAX_MATCH;
-
- /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
- * It is easy to get rid of this optimization if necessary.
- */
- Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
-
- Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
-
- Assert(cur_match < s->strstart, "no future");
-
- match = s->window + cur_match;
-
- /* Return failure if the match length is less than 2:
- */
- if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;
-
- /* The check at best_len-1 can be removed because it will be made
- * again later. (This heuristic is not always a win.)
- * It is not necessary to compare scan[2] and match[2] since they
- * are always equal when the other bytes match, given that
- * the hash keys are equal and that HASH_BITS >= 8.
- */
- scan += 2, match += 2;
- Assert(*scan == *match, "match[2]?");
-
- /* We check for insufficient lookahead only every 8th comparison;
- * the 256th check will be made at strstart+258.
- */
- do {
- } while (*++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- *++scan == *++match && *++scan == *++match &&
- scan < strend);
-
- Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
-
- len = MAX_MATCH - (int)(strend - scan);
-
- if (len < MIN_MATCH) return MIN_MATCH - 1;
-
- s->match_start = cur_match;
- return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead;
-}
-
-#ifdef DEBUG
-/* ===========================================================================
- * Check that the match at match_start is indeed a match.
- */
-local void check_match(s, start, match, length)
- deflate_state *s;
- IPos start, match;
- int length;
-{
- /* check that the match is indeed a match */
- if (zmemcmp(s->window + match,
- s->window + start, length) != EQUAL) {
- fprintf(stderr, " start %u, match %u, length %d\n",
- start, match, length);
- do {
- fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
- } while (--length != 0);
- z_error("invalid match");
- }
- if (z_verbose > 1) {
- fprintf(stderr,"\\[%d,%d]", start-match, length);
- do { putc(s->window[start++], stderr); } while (--length != 0);
- }
-}
-#else
-# define check_match(s, start, match, length)
-#endif /* DEBUG */
-
-/* ===========================================================================
- * Fill the window when the lookahead becomes insufficient.
- * Updates strstart and lookahead.
- *
- * IN assertion: lookahead < MIN_LOOKAHEAD
- * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
- * At least one byte has been read, or avail_in == 0; reads are
- * performed for at least two bytes (required for the zip translate_eol
- * option -- not supported here).
- */
-local void fill_window(s)
- deflate_state *s;
-{
- register unsigned n, m;
- register Posf *p;
- unsigned more; /* Amount of free space at the end of the window. */
- uInt wsize = s->w_size;
-
- do {
- more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
-
- /* Deal with !@#$% 64K limit: */
- if (sizeof(int) <= 2) {
- if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
- more = wsize;
-
- } else if (more == (unsigned)(-1)) {
- /* Very unlikely, but possible on 16 bit machine if
- * strstart == 0 && lookahead == 1 (input done a byte at time)
- */
- more--;
- }
- }
-
- /* If the window is almost full and there is insufficient lookahead,
- * move the upper half to the lower one to make room in the upper half.
- */
- if (s->strstart >= wsize+MAX_DIST(s)) {
-
- zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
- s->match_start -= wsize;
- s->strstart -= wsize; /* we now have strstart >= MAX_DIST */
- s->block_start -= (long) wsize;
-
- /* Slide the hash table (could be avoided with 32 bit values
- at the expense of memory usage). We slide even when level == 0
- to keep the hash table consistent if we switch back to level > 0
- later. (Using level 0 permanently is not an optimal usage of
- zlib, so we don't care about this pathological case.)
- */
- /* %%% avoid this when Z_RLE */
- n = s->hash_size;
- p = &s->head[n];
- do {
- m = *--p;
- *p = (Pos)(m >= wsize ? m-wsize : NIL);
- } while (--n);
-
- n = wsize;
-#ifndef FASTEST
- p = &s->prev[n];
- do {
- m = *--p;
- *p = (Pos)(m >= wsize ? m-wsize : NIL);
- /* If n is not on any hash chain, prev[n] is garbage but
- * its value will never be used.
- */
- } while (--n);
-#endif
- more += wsize;
- }
- if (s->strm->avail_in == 0) return;
-
- /* If there was no sliding:
- * strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
- * more == window_size - lookahead - strstart
- * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
- * => more >= window_size - 2*WSIZE + 2
- * In the BIG_MEM or MMAP case (not yet supported),
- * window_size == input_size + MIN_LOOKAHEAD &&
- * strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
- * Otherwise, window_size == 2*WSIZE so more >= 2.
- * If there was sliding, more >= WSIZE. So in all cases, more >= 2.
- */
- Assert(more >= 2, "more < 2");
-
- n = read_buf(s->strm, s->window + s->strstart + s->lookahead, more);
- s->lookahead += n;
-
- /* Initialize the hash value now that we have some input: */
- if (s->lookahead >= MIN_MATCH) {
- s->ins_h = s->window[s->strstart];
- UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
-#if MIN_MATCH != 3
- Call UPDATE_HASH() MIN_MATCH-3 more times
-#endif
- }
- /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
- * but this is not important since only literal bytes will be emitted.
- */
-
- } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0);
-}
-
-/* ===========================================================================
- * Flush the current block, with given end-of-file flag.
- * IN assertion: strstart is set to the end of the current match.
- */
-#define FLUSH_BLOCK_ONLY(s, eof) { \
- _tr_flush_block(s, (s->block_start >= 0L ? \
- (charf *)&s->window[(unsigned)s->block_start] : \
- (charf *)Z_NULL), \
- (ulg)((long)s->strstart - s->block_start), \
- (eof)); \
- s->block_start = s->strstart; \
- flush_pending(s->strm); \
- Tracev((stderr,"[FLUSH]")); \
-}
-
-/* Same but force premature exit if necessary. */
-#define FLUSH_BLOCK(s, eof) { \
- FLUSH_BLOCK_ONLY(s, eof); \
- if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \
-}
-
-/* ===========================================================================
- * Copy without compression as much as possible from the input stream, return
- * the current block state.
- * This function does not insert new strings in the dictionary since
- * uncompressible data is probably not useful. This function is used
- * only for the level=0 compression option.
- * NOTE: this function should be optimized to avoid extra copying from
- * window to pending_buf.
- */
-local block_state deflate_stored(s, flush)
- deflate_state *s;
- int flush;
-{
- /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
- * to pending_buf_size, and each stored block has a 5 byte header:
- */
- ulg max_block_size = 0xffff;
- ulg max_start;
-
- if (max_block_size > s->pending_buf_size - 5) {
- max_block_size = s->pending_buf_size - 5;
- }
-
- /* Copy as much as possible from input to output: */
- for (;;) {
- /* Fill the window as much as possible: */
- if (s->lookahead <= 1) {
-
- Assert(s->strstart < s->w_size+MAX_DIST(s) ||
- s->block_start >= (long)s->w_size, "slide too late");
-
- fill_window(s);
- if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
-
- if (s->lookahead == 0) break; /* flush the current block */
- }
- Assert(s->block_start >= 0L, "block gone");
-
- s->strstart += s->lookahead;
- s->lookahead = 0;
-
- /* Emit a stored block if pending_buf will be full: */
- max_start = s->block_start + max_block_size;
- if (s->strstart == 0 || (ulg)s->strstart >= max_start) {
- /* strstart == 0 is possible when wraparound on 16-bit machine */
- s->lookahead = (uInt)(s->strstart - max_start);
- s->strstart = (uInt)max_start;
- FLUSH_BLOCK(s, 0);
- }
- /* Flush if we may have to slide, otherwise block_start may become
- * negative and the data will be gone:
- */
- if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {
- FLUSH_BLOCK(s, 0);
- }
- }
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
-}
-
-/* ===========================================================================
- * Compress as much as possible from the input stream, return the current
- * block state.
- * This function does not perform lazy evaluation of matches and inserts
- * new strings in the dictionary only for unmatched strings or for short
- * matches. It is used only for the fast compression options.
- */
-local block_state deflate_fast(s, flush)
- deflate_state *s;
- int flush;
-{
- IPos hash_head = NIL; /* head of the hash chain */
- int bflush; /* set if current block must be flushed */
-
- for (;;) {
- /* Make sure that we always have enough lookahead, except
- * at the end of the input file. We need MAX_MATCH bytes
- * for the next match, plus MIN_MATCH bytes to insert the
- * string following the next match.
- */
- if (s->lookahead < MIN_LOOKAHEAD) {
- fill_window(s);
- if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
- return need_more;
- }
- if (s->lookahead == 0) break; /* flush the current block */
- }
-
- /* Insert the string window[strstart .. strstart+2] in the
- * dictionary, and set hash_head to the head of the hash chain:
- */
- if (s->lookahead >= MIN_MATCH) {
- INSERT_STRING(s, s->strstart, hash_head);
- }
-
- /* Find the longest match, discarding those <= prev_length.
- * At this point we have always match_length < MIN_MATCH
- */
- if (hash_head != NIL && s->strstart - hash_head <= MAX_DIST(s)) {
- /* To simplify the code, we prevent matches with the string
- * of window index 0 (in particular we have to avoid a match
- * of the string with itself at the start of the input file).
- */
-#ifdef FASTEST
- if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) ||
- (s->strategy == Z_RLE && s->strstart - hash_head == 1)) {
- s->match_length = longest_match_fast (s, hash_head);
- }
-#else
- if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
- s->match_length = longest_match (s, hash_head);
- } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
- s->match_length = longest_match_fast (s, hash_head);
- }
-#endif
- /* longest_match() or longest_match_fast() sets match_start */
- }
- if (s->match_length >= MIN_MATCH) {
- check_match(s, s->strstart, s->match_start, s->match_length);
-
- _tr_tally_dist(s, s->strstart - s->match_start,
- s->match_length - MIN_MATCH, bflush);
-
- s->lookahead -= s->match_length;
-
- /* Insert new strings in the hash table only if the match length
- * is not too large. This saves time but degrades compression.
- */
-#ifndef FASTEST
- if (s->match_length <= s->max_insert_length &&
- s->lookahead >= MIN_MATCH) {
- s->match_length--; /* string at strstart already in table */
- do {
- s->strstart++;
- INSERT_STRING(s, s->strstart, hash_head);
- /* strstart never exceeds WSIZE-MAX_MATCH, so there are
- * always MIN_MATCH bytes ahead.
- */
- } while (--s->match_length != 0);
- s->strstart++;
- } else
-#endif
- {
- s->strstart += s->match_length;
- s->match_length = 0;
- s->ins_h = s->window[s->strstart];
- UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
-#if MIN_MATCH != 3
- Call UPDATE_HASH() MIN_MATCH-3 more times
-#endif
- /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
- * matter since it will be recomputed at next deflate call.
- */
- }
- } else {
- /* No match, output a literal byte */
- Tracevv((stderr,"%c", s->window[s->strstart]));
- _tr_tally_lit (s, s->window[s->strstart], bflush);
- s->lookahead--;
- s->strstart++;
- }
- if (bflush) FLUSH_BLOCK(s, 0);
- }
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
-}
-
-#ifndef FASTEST
-/* ===========================================================================
- * Same as above, but achieves better compression. We use a lazy
- * evaluation for matches: a match is finally adopted only if there is
- * no better match at the next window position.
- */
-local block_state deflate_slow(s, flush)
- deflate_state *s;
- int flush;
-{
- IPos hash_head = NIL; /* head of hash chain */
- int bflush; /* set if current block must be flushed */
-
- /* Process the input block. */
- for (;;) {
- /* Make sure that we always have enough lookahead, except
- * at the end of the input file. We need MAX_MATCH bytes
- * for the next match, plus MIN_MATCH bytes to insert the
- * string following the next match.
- */
- if (s->lookahead < MIN_LOOKAHEAD) {
- fill_window(s);
- if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
- return need_more;
- }
- if (s->lookahead == 0) break; /* flush the current block */
- }
-
- /* Insert the string window[strstart .. strstart+2] in the
- * dictionary, and set hash_head to the head of the hash chain:
- */
- if (s->lookahead >= MIN_MATCH) {
- INSERT_STRING(s, s->strstart, hash_head);
- }
-
- /* Find the longest match, discarding those <= prev_length.
- */
- s->prev_length = s->match_length, s->prev_match = s->match_start;
- s->match_length = MIN_MATCH-1;
-
- if (hash_head != NIL && s->prev_length < s->max_lazy_match &&
- s->strstart - hash_head <= MAX_DIST(s)) {
- /* To simplify the code, we prevent matches with the string
- * of window index 0 (in particular we have to avoid a match
- * of the string with itself at the start of the input file).
- */
- if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
- s->match_length = longest_match (s, hash_head);
- } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
- s->match_length = longest_match_fast (s, hash_head);
- }
- /* longest_match() or longest_match_fast() sets match_start */
-
- if (s->match_length <= 5 && (s->strategy == Z_FILTERED
-#if TOO_FAR <= 32767
- || (s->match_length == MIN_MATCH &&
- s->strstart - s->match_start > TOO_FAR)
-#endif
- )) {
-
- /* If prev_match is also MIN_MATCH, match_start is garbage
- * but we will ignore the current match anyway.
- */
- s->match_length = MIN_MATCH-1;
- }
- }
- /* If there was a match at the previous step and the current
- * match is not better, output the previous match:
- */
- if (s->prev_length >= MIN_MATCH && s->match_length <= s->prev_length) {
- uInt max_insert = s->strstart + s->lookahead - MIN_MATCH;
- /* Do not insert strings in hash table beyond this. */
-
- check_match(s, s->strstart-1, s->prev_match, s->prev_length);
-
- _tr_tally_dist(s, s->strstart -1 - s->prev_match,
- s->prev_length - MIN_MATCH, bflush);
-
- /* Insert in hash table all strings up to the end of the match.
- * strstart-1 and strstart are already inserted. If there is not
- * enough lookahead, the last two strings are not inserted in
- * the hash table.
- */
- s->lookahead -= s->prev_length-1;
- s->prev_length -= 2;
- do {
- if (++s->strstart <= max_insert) {
- INSERT_STRING(s, s->strstart, hash_head);
- }
- } while (--s->prev_length != 0);
- s->match_available = 0;
- s->match_length = MIN_MATCH-1;
- s->strstart++;
-
- if (bflush) FLUSH_BLOCK(s, 0);
-
- } else if (s->match_available) {
- /* If there was no match at the previous position, output a
- * single literal. If there was a match but the current match
- * is longer, truncate the previous match to a single literal.
- */
- Tracevv((stderr,"%c", s->window[s->strstart-1]));
- _tr_tally_lit(s, s->window[s->strstart-1], bflush);
- if (bflush) {
- FLUSH_BLOCK_ONLY(s, 0);
- }
- s->strstart++;
- s->lookahead--;
- if (s->strm->avail_out == 0) return need_more;
- } else {
- /* There is no previous match to compare with, wait for
- * the next step to decide.
- */
- s->match_available = 1;
- s->strstart++;
- s->lookahead--;
- }
- }
- Assert (flush != Z_NO_FLUSH, "no flush?");
- if (s->match_available) {
- Tracevv((stderr,"%c", s->window[s->strstart-1]));
- _tr_tally_lit(s, s->window[s->strstart-1], bflush);
- s->match_available = 0;
- }
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
-}
-#endif /* FASTEST */
-
-#if 0
-/* ===========================================================================
- * For Z_RLE, simply look for runs of bytes, generate matches only of distance
- * one. Do not maintain a hash table. (It will be regenerated if this run of
- * deflate switches away from Z_RLE.)
- */
-local block_state deflate_rle(s, flush)
- deflate_state *s;
- int flush;
-{
- int bflush; /* set if current block must be flushed */
- uInt run; /* length of run */
- uInt max; /* maximum length of run */
- uInt prev; /* byte at distance one to match */
- Bytef *scan; /* scan for end of run */
-
- for (;;) {
- /* Make sure that we always have enough lookahead, except
- * at the end of the input file. We need MAX_MATCH bytes
- * for the longest encodable run.
- */
- if (s->lookahead < MAX_MATCH) {
- fill_window(s);
- if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) {
- return need_more;
- }
- if (s->lookahead == 0) break; /* flush the current block */
- }
-
- /* See how many times the previous byte repeats */
- run = 0;
- if (s->strstart > 0) { /* if there is a previous byte, that is */
- max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH;
- scan = s->window + s->strstart - 1;
- prev = *scan++;
- do {
- if (*scan++ != prev)
- break;
- } while (++run < max);
- }
-
- /* Emit match if have run of MIN_MATCH or longer, else emit literal */
- if (run >= MIN_MATCH) {
- check_match(s, s->strstart, s->strstart - 1, run);
- _tr_tally_dist(s, 1, run - MIN_MATCH, bflush);
- s->lookahead -= run;
- s->strstart += run;
- } else {
- /* No match, output a literal byte */
- Tracevv((stderr,"%c", s->window[s->strstart]));
- _tr_tally_lit (s, s->window[s->strstart], bflush);
- s->lookahead--;
- s->strstart++;
- }
- if (bflush) FLUSH_BLOCK(s, 0);
- }
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
-}
-#endif
+++ /dev/null
-/* deflate.h -- internal compression state
- * Copyright (C) 1995-2004 Jean-loup Gailly
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-/* @(#) $Id$ */
-
-#ifndef DEFLATE_H
-#define DEFLATE_H
-
-#include "zutil.h"
-
-/* define NO_GZIP when compiling if you want to disable gzip header and
- trailer creation by deflate(). NO_GZIP would be used to avoid linking in
- the crc code when it is not needed. For shared libraries, gzip encoding
- should be left enabled. */
-#ifndef NO_GZIP
-# define GZIP
-#endif
-
-/* ===========================================================================
- * Internal compression state.
- */
-
-#define LENGTH_CODES 29
-/* number of length codes, not counting the special END_BLOCK code */
-
-#define LITERALS 256
-/* number of literal bytes 0..255 */
-
-#define L_CODES (LITERALS+1+LENGTH_CODES)
-/* number of Literal or Length codes, including the END_BLOCK code */
-
-#define D_CODES 30
-/* number of distance codes */
-
-#define BL_CODES 19
-/* number of codes used to transfer the bit lengths */
-
-#define HEAP_SIZE (2*L_CODES+1)
-/* maximum heap size */
-
-#define MAX_BITS 15
-/* All codes must not exceed MAX_BITS bits */
-
-#define INIT_STATE 42
-#define EXTRA_STATE 69
-#define NAME_STATE 73
-#define COMMENT_STATE 91
-#define HCRC_STATE 103
-#define BUSY_STATE 113
-#define FINISH_STATE 666
-/* Stream status */
-
-
-/* Data structure describing a single value and its code string. */
-typedef struct ct_data_s {
- union {
- ush freq; /* frequency count */
- ush code; /* bit string */
- } fc;
- union {
- ush dad; /* father node in Huffman tree */
- ush len; /* length of bit string */
- } dl;
-} FAR ct_data;
-
-#define Freq fc.freq
-#define Code fc.code
-#define Dad dl.dad
-#define Len dl.len
-
-typedef struct static_tree_desc_s static_tree_desc;
-
-typedef struct tree_desc_s {
- ct_data *dyn_tree; /* the dynamic tree */
- int max_code; /* largest code with non zero frequency */
- static_tree_desc *stat_desc; /* the corresponding static tree */
-} FAR tree_desc;
-
-typedef ush Pos;
-typedef Pos FAR Posf;
-typedef unsigned IPos;
-
-/* A Pos is an index in the character window. We use short instead of int to
- * save space in the various tables. IPos is used only for parameter passing.
- */
-
-typedef struct internal_state {
- z_streamp strm; /* pointer back to this zlib stream */
- int status; /* as the name implies */
- Bytef *pending_buf; /* output still pending */
- ulg pending_buf_size; /* size of pending_buf */
- Bytef *pending_out; /* next pending byte to output to the stream */
- uInt pending; /* nb of bytes in the pending buffer */
- int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
- gz_headerp gzhead; /* gzip header information to write */
- uInt gzindex; /* where in extra, name, or comment */
- Byte method; /* STORED (for zip only) or DEFLATED */
- int last_flush; /* value of flush param for previous deflate call */
-
- /* used by deflate.c: */
-
- uInt w_size; /* LZ77 window size (32K by default) */
- uInt w_bits; /* log2(w_size) (8..16) */
- uInt w_mask; /* w_size - 1 */
-
- Bytef *window;
- /* Sliding window. Input bytes are read into the second half of the window,
- * and move to the first half later to keep a dictionary of at least wSize
- * bytes. With this organization, matches are limited to a distance of
- * wSize-MAX_MATCH bytes, but this ensures that IO is always
- * performed with a length multiple of the block size. Also, it limits
- * the window size to 64K, which is quite useful on MSDOS.
- * To do: use the user input buffer as sliding window.
- */
-
- ulg window_size;
- /* Actual size of window: 2*wSize, except when the user input buffer
- * is directly used as sliding window.
- */
-
- Posf *prev;
- /* Link to older string with same hash index. To limit the size of this
- * array to 64K, this link is maintained only for the last 32K strings.
- * An index in this array is thus a window index modulo 32K.
- */
-
- Posf *head; /* Heads of the hash chains or NIL. */
-
- uInt ins_h; /* hash index of string to be inserted */
- uInt hash_size; /* number of elements in hash table */
- uInt hash_bits; /* log2(hash_size) */
- uInt hash_mask; /* hash_size-1 */
-
- uInt hash_shift;
- /* Number of bits by which ins_h must be shifted at each input
- * step. It must be such that after MIN_MATCH steps, the oldest
- * byte no longer takes part in the hash key, that is:
- * hash_shift * MIN_MATCH >= hash_bits
- */
-
- long block_start;
- /* Window position at the beginning of the current output block. Gets
- * negative when the window is moved backwards.
- */
-
- uInt match_length; /* length of best match */
- IPos prev_match; /* previous match */
- int match_available; /* set if previous match exists */
- uInt strstart; /* start of string to insert */
- uInt match_start; /* start of matching string */
- uInt lookahead; /* number of valid bytes ahead in window */
-
- uInt prev_length;
- /* Length of the best match at previous step. Matches not greater than this
- * are discarded. This is used in the lazy match evaluation.
- */
-
- uInt max_chain_length;
- /* To speed up deflation, hash chains are never searched beyond this
- * length. A higher limit improves compression ratio but degrades the
- * speed.
- */
-
- uInt max_lazy_match;
- /* Attempt to find a better match only when the current match is strictly
- * smaller than this value. This mechanism is used only for compression
- * levels >= 4.
- */
-# define max_insert_length max_lazy_match
- /* Insert new strings in the hash table only if the match length is not
- * greater than this length. This saves time but degrades compression.
- * max_insert_length is used only for compression levels <= 3.
- */
-
- int level; /* compression level (1..9) */
- int strategy; /* favor or force Huffman coding*/
-
- uInt good_match;
- /* Use a faster search when the previous match is longer than this */
-
- int nice_match; /* Stop searching when current match exceeds this */
-
- /* used by trees.c: */
- /* Didn't use ct_data typedef below to supress compiler warning */
- struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
- struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
- struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */
-
- struct tree_desc_s l_desc; /* desc. for literal tree */
- struct tree_desc_s d_desc; /* desc. for distance tree */
- struct tree_desc_s bl_desc; /* desc. for bit length tree */
-
- ush bl_count[MAX_BITS+1];
- /* number of codes at each bit length for an optimal tree */
-
- int heap[2*L_CODES+1]; /* heap used to build the Huffman trees */
- int heap_len; /* number of elements in the heap */
- int heap_max; /* element of largest frequency */
- /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
- * The same heap array is used to build all trees.
- */
-
- uch depth[2*L_CODES+1];
- /* Depth of each subtree used as tie breaker for trees of equal frequency
- */
-
- uchf *l_buf; /* buffer for literals or lengths */
-
- uInt lit_bufsize;
- /* Size of match buffer for literals/lengths. There are 4 reasons for
- * limiting lit_bufsize to 64K:
- * - frequencies can be kept in 16 bit counters
- * - if compression is not successful for the first block, all input
- * data is still in the window so we can still emit a stored block even
- * when input comes from standard input. (This can also be done for
- * all blocks if lit_bufsize is not greater than 32K.)
- * - if compression is not successful for a file smaller than 64K, we can
- * even emit a stored file instead of a stored block (saving 5 bytes).
- * This is applicable only for zip (not gzip or zlib).
- * - creating new Huffman trees less frequently may not provide fast
- * adaptation to changes in the input data statistics. (Take for
- * example a binary file with poorly compressible code followed by
- * a highly compressible string table.) Smaller buffer sizes give
- * fast adaptation but have of course the overhead of transmitting
- * trees more frequently.
- * - I can't count above 4
- */
-
- uInt last_lit; /* running index in l_buf */
-
- ushf *d_buf;
- /* Buffer for distances. To simplify the code, d_buf and l_buf have
- * the same number of elements. To use different lengths, an extra flag
- * array would be necessary.
- */
-
- ulg opt_len; /* bit length of current block with optimal trees */
- ulg static_len; /* bit length of current block with static trees */
- uInt matches; /* number of string matches in current block */
- int last_eob_len; /* bit length of EOB code for last block */
-
-#ifdef DEBUG
- ulg compressed_len; /* total bit length of compressed file mod 2^32 */
- ulg bits_sent; /* bit length of compressed data sent mod 2^32 */
-#endif
-
- ush bi_buf;
- /* Output buffer. bits are inserted starting at the bottom (least
- * significant bits).
- */
- int bi_valid;
- /* Number of valid bits in bi_buf. All bits above the last valid bit
- * are always zero.
- */
-
-} FAR deflate_state;
-
-/* Output a byte on the stream.
- * IN assertion: there is enough room in pending_buf.
- */
-#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
-
-
-#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
-/* Minimum amount of lookahead, except at the end of the input file.
- * See deflate.c for comments about the MIN_MATCH+1.
- */
-
-#define MAX_DIST(s) ((s)->w_size-MIN_LOOKAHEAD)
-/* In order to simplify the code, particularly on 16 bit machines, match
- * distances are limited to MAX_DIST instead of WSIZE.
- */
-
- /* in trees.c */
-void _tr_init OF((deflate_state *s));
-int _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
-void _tr_flush_block OF((deflate_state *s, charf *buf, ulg stored_len,
- int eof));
-void _tr_align OF((deflate_state *s));
-void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
- int eof));
-
-#define d_code(dist) \
- ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
-/* Mapping from a distance to a distance code. dist is the distance - 1 and
- * must not have side effects. _dist_code[256] and _dist_code[257] are never
- * used.
- */
-
-#ifndef DEBUG
-/* Inline versions of _tr_tally for speed: */
-
-#if defined(GEN_TREES_H) || !defined(STDC)
- extern uch _length_code[];
- extern uch _dist_code[];
-#else
- extern const uch _length_code[];
- extern const uch _dist_code[];
-#endif
-
-# define _tr_tally_lit(s, c, flush) \
- { uch cc = (c); \
- s->d_buf[s->last_lit] = 0; \
- s->l_buf[s->last_lit++] = cc; \
- s->dyn_ltree[cc].Freq++; \
- flush = (s->last_lit == s->lit_bufsize-1); \
- }
-# define _tr_tally_dist(s, distance, length, flush) \
- { uch len = (length); \
- ush dist = (distance); \
- s->d_buf[s->last_lit] = dist; \
- s->l_buf[s->last_lit++] = len; \
- dist--; \
- s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
- s->dyn_dtree[d_code(dist)].Freq++; \
- flush = (s->last_lit == s->lit_bufsize-1); \
- }
-#else
-# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
-# define _tr_tally_dist(s, distance, length, flush) \
- flush = _tr_tally(s, distance, length)
-#endif
-
-#endif /* DEFLATE_H */
+++ /dev/null
-/* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2004 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#include <stdio.h>
-#include "zlib.h"
-
-#ifdef STDC
-# include <string.h>
-# include <stdlib.h>
-#endif
-
-#if defined(VMS) || defined(RISCOS)
-# define TESTFILE "foo-gz"
-#else
-# define TESTFILE "foo.gz"
-#endif
-
-#define CHECK_ERR(err, msg) { \
- if (err != Z_OK) { \
- fprintf(stderr, "%s error: %d\n", msg, err); \
- exit(1); \
- } \
-}
-
-const char hello[] = "hello, hello!";
-/* "hello world" would be more standard, but the repeated "hello"
- * stresses the compression code better, sorry...
- */
-
-const char dictionary[] = "hello";
-uLong dictId; /* Adler32 value of the dictionary */
-
-void test_compress OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_gzio OF((const char *fname,
- Byte *uncompr, uLong uncomprLen));
-void test_deflate OF((Byte *compr, uLong comprLen));
-void test_inflate OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_large_deflate OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_large_inflate OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_flush OF((Byte *compr, uLong *comprLen));
-void test_sync OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_dict_deflate OF((Byte *compr, uLong comprLen));
-void test_dict_inflate OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-int main OF((int argc, char *argv[]));
-
-/* ===========================================================================
- * Test compress() and uncompress()
- */
-void test_compress(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- uLong len = (uLong)strlen(hello)+1;
-
- err = compress(compr, &comprLen, (const Bytef*)hello, len);
- CHECK_ERR(err, "compress");
-
- strcpy((char*)uncompr, "garbage");
-
- err = uncompress(uncompr, &uncomprLen, compr, comprLen);
- CHECK_ERR(err, "uncompress");
-
- if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad uncompress\n");
- exit(1);
- } else {
- printf("uncompress(): %s\n", (char *)uncompr);
- }
-}
-
-/* ===========================================================================
- * Test read/write of .gz files
- */
-void test_gzio(fname, uncompr, uncomprLen)
- const char *fname; /* compressed file name */
- Byte *uncompr;
- uLong uncomprLen;
-{
-#ifdef NO_GZCOMPRESS
- fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
-#else
- int err;
- int len = (int)strlen(hello)+1;
- gzFile file;
- z_off_t pos;
-
- file = gzopen(fname, "wb");
- if (file == NULL) {
- fprintf(stderr, "gzopen error\n");
- exit(1);
- }
- gzputc(file, 'h');
- if (gzputs(file, "ello") != 4) {
- fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
- exit(1);
- }
- if (gzprintf(file, ", %s!", "hello") != 8) {
- fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
- exit(1);
- }
- gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
- gzclose(file);
-
- file = gzopen(fname, "rb");
- if (file == NULL) {
- fprintf(stderr, "gzopen error\n");
- exit(1);
- }
- strcpy((char*)uncompr, "garbage");
-
- if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {
- fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
- exit(1);
- }
- if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
- exit(1);
- } else {
- printf("gzread(): %s\n", (char*)uncompr);
- }
-
- pos = gzseek(file, -8L, SEEK_CUR);
- if (pos != 6 || gztell(file) != pos) {
- fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
- (long)pos, (long)gztell(file));
- exit(1);
- }
-
- if (gzgetc(file) != ' ') {
- fprintf(stderr, "gzgetc error\n");
- exit(1);
- }
-
- if (gzungetc(' ', file) != ' ') {
- fprintf(stderr, "gzungetc error\n");
- exit(1);
- }
-
- gzgets(file, (char*)uncompr, (int)uncomprLen);
- if (strlen((char*)uncompr) != 7) { /* " hello!" */
- fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
- exit(1);
- }
- if (strcmp((char*)uncompr, hello + 6)) {
- fprintf(stderr, "bad gzgets after gzseek\n");
- exit(1);
- } else {
- printf("gzgets() after gzseek: %s\n", (char*)uncompr);
- }
-
- gzclose(file);
-#endif
-}
-
-/* ===========================================================================
- * Test deflate() with small buffers
- */
-void test_deflate(compr, comprLen)
- Byte *compr;
- uLong comprLen;
-{
- z_stream c_stream; /* compression stream */
- int err;
- uLong len = (uLong)strlen(hello)+1;
-
- c_stream.zalloc = (alloc_func)0;
- c_stream.zfree = (free_func)0;
- c_stream.opaque = (voidpf)0;
-
- err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
- CHECK_ERR(err, "deflateInit");
-
- c_stream.next_in = (Bytef*)hello;
- c_stream.next_out = compr;
-
- while (c_stream.total_in != len && c_stream.total_out < comprLen) {
- c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
- err = deflate(&c_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "deflate");
- }
- /* Finish the stream, still forcing small buffers: */
- for (;;) {
- c_stream.avail_out = 1;
- err = deflate(&c_stream, Z_FINISH);
- if (err == Z_STREAM_END) break;
- CHECK_ERR(err, "deflate");
- }
-
- err = deflateEnd(&c_stream);
- CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with small buffers
- */
-void test_inflate(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- z_stream d_stream; /* decompression stream */
-
- strcpy((char*)uncompr, "garbage");
-
- d_stream.zalloc = (alloc_func)0;
- d_stream.zfree = (free_func)0;
- d_stream.opaque = (voidpf)0;
-
- d_stream.next_in = compr;
- d_stream.avail_in = 0;
- d_stream.next_out = uncompr;
-
- err = inflateInit(&d_stream);
- CHECK_ERR(err, "inflateInit");
-
- while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
- d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
- err = inflate(&d_stream, Z_NO_FLUSH);
- if (err == Z_STREAM_END) break;
- CHECK_ERR(err, "inflate");
- }
-
- err = inflateEnd(&d_stream);
- CHECK_ERR(err, "inflateEnd");
-
- if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad inflate\n");
- exit(1);
- } else {
- printf("inflate(): %s\n", (char *)uncompr);
- }
-}
-
-/* ===========================================================================
- * Test deflate() with large buffers and dynamic change of compression level
- */
-void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- z_stream c_stream; /* compression stream */
- int err;
-
- c_stream.zalloc = (alloc_func)0;
- c_stream.zfree = (free_func)0;
- c_stream.opaque = (voidpf)0;
-
- err = deflateInit(&c_stream, Z_BEST_SPEED);
- CHECK_ERR(err, "deflateInit");
-
- c_stream.next_out = compr;
- c_stream.avail_out = (uInt)comprLen;
-
- /* At this point, uncompr is still mostly zeroes, so it should compress
- * very well:
- */
- c_stream.next_in = uncompr;
- c_stream.avail_in = (uInt)uncomprLen;
- err = deflate(&c_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "deflate");
- if (c_stream.avail_in != 0) {
- fprintf(stderr, "deflate not greedy\n");
- exit(1);
- }
-
- /* Feed in already compressed data and switch to no compression: */
- deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
- c_stream.next_in = compr;
- c_stream.avail_in = (uInt)comprLen/2;
- err = deflate(&c_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "deflate");
-
- /* Switch back to compressing mode: */
- deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
- c_stream.next_in = uncompr;
- c_stream.avail_in = (uInt)uncomprLen;
- err = deflate(&c_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "deflate");
-
- err = deflate(&c_stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- fprintf(stderr, "deflate should report Z_STREAM_END\n");
- exit(1);
- }
- err = deflateEnd(&c_stream);
- CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with large buffers
- */
-void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- z_stream d_stream; /* decompression stream */
-
- strcpy((char*)uncompr, "garbage");
-
- d_stream.zalloc = (alloc_func)0;
- d_stream.zfree = (free_func)0;
- d_stream.opaque = (voidpf)0;
-
- d_stream.next_in = compr;
- d_stream.avail_in = (uInt)comprLen;
-
- err = inflateInit(&d_stream);
- CHECK_ERR(err, "inflateInit");
-
- for (;;) {
- d_stream.next_out = uncompr; /* discard the output */
- d_stream.avail_out = (uInt)uncomprLen;
- err = inflate(&d_stream, Z_NO_FLUSH);
- if (err == Z_STREAM_END) break;
- CHECK_ERR(err, "large inflate");
- }
-
- err = inflateEnd(&d_stream);
- CHECK_ERR(err, "inflateEnd");
-
- if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
- fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
- exit(1);
- } else {
- printf("large_inflate(): OK\n");
- }
-}
-
-/* ===========================================================================
- * Test deflate() with full flush
- */
-void test_flush(compr, comprLen)
- Byte *compr;
- uLong *comprLen;
-{
- z_stream c_stream; /* compression stream */
- int err;
- uInt len = (uInt)strlen(hello)+1;
-
- c_stream.zalloc = (alloc_func)0;
- c_stream.zfree = (free_func)0;
- c_stream.opaque = (voidpf)0;
-
- err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
- CHECK_ERR(err, "deflateInit");
-
- c_stream.next_in = (Bytef*)hello;
- c_stream.next_out = compr;
- c_stream.avail_in = 3;
- c_stream.avail_out = (uInt)*comprLen;
- err = deflate(&c_stream, Z_FULL_FLUSH);
- CHECK_ERR(err, "deflate");
-
- compr[3]++; /* force an error in first compressed block */
- c_stream.avail_in = len - 3;
-
- err = deflate(&c_stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- CHECK_ERR(err, "deflate");
- }
- err = deflateEnd(&c_stream);
- CHECK_ERR(err, "deflateEnd");
-
- *comprLen = c_stream.total_out;
-}
-
-/* ===========================================================================
- * Test inflateSync()
- */
-void test_sync(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- z_stream d_stream; /* decompression stream */
-
- strcpy((char*)uncompr, "garbage");
-
- d_stream.zalloc = (alloc_func)0;
- d_stream.zfree = (free_func)0;
- d_stream.opaque = (voidpf)0;
-
- d_stream.next_in = compr;
- d_stream.avail_in = 2; /* just read the zlib header */
-
- err = inflateInit(&d_stream);
- CHECK_ERR(err, "inflateInit");
-
- d_stream.next_out = uncompr;
- d_stream.avail_out = (uInt)uncomprLen;
-
- inflate(&d_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "inflate");
-
- d_stream.avail_in = (uInt)comprLen-2; /* read all compressed data */
- err = inflateSync(&d_stream); /* but skip the damaged part */
- CHECK_ERR(err, "inflateSync");
-
- err = inflate(&d_stream, Z_FINISH);
- if (err != Z_DATA_ERROR) {
- fprintf(stderr, "inflate should report DATA_ERROR\n");
- /* Because of incorrect adler32 */
- exit(1);
- }
- err = inflateEnd(&d_stream);
- CHECK_ERR(err, "inflateEnd");
-
- printf("after inflateSync(): hel%s\n", (char *)uncompr);
-}
-
-/* ===========================================================================
- * Test deflate() with preset dictionary
- */
-void test_dict_deflate(compr, comprLen)
- Byte *compr;
- uLong comprLen;
-{
- z_stream c_stream; /* compression stream */
- int err;
-
- c_stream.zalloc = (alloc_func)0;
- c_stream.zfree = (free_func)0;
- c_stream.opaque = (voidpf)0;
-
- err = deflateInit(&c_stream, Z_BEST_COMPRESSION);
- CHECK_ERR(err, "deflateInit");
-
- err = deflateSetDictionary(&c_stream,
- (const Bytef*)dictionary, sizeof(dictionary));
- CHECK_ERR(err, "deflateSetDictionary");
-
- dictId = c_stream.adler;
- c_stream.next_out = compr;
- c_stream.avail_out = (uInt)comprLen;
-
- c_stream.next_in = (Bytef*)hello;
- c_stream.avail_in = (uInt)strlen(hello)+1;
-
- err = deflate(&c_stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- fprintf(stderr, "deflate should report Z_STREAM_END\n");
- exit(1);
- }
- err = deflateEnd(&c_stream);
- CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with a preset dictionary
- */
-void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- z_stream d_stream; /* decompression stream */
-
- strcpy((char*)uncompr, "garbage");
-
- d_stream.zalloc = (alloc_func)0;
- d_stream.zfree = (free_func)0;
- d_stream.opaque = (voidpf)0;
-
- d_stream.next_in = compr;
- d_stream.avail_in = (uInt)comprLen;
-
- err = inflateInit(&d_stream);
- CHECK_ERR(err, "inflateInit");
-
- d_stream.next_out = uncompr;
- d_stream.avail_out = (uInt)uncomprLen;
-
- for (;;) {
- err = inflate(&d_stream, Z_NO_FLUSH);
- if (err == Z_STREAM_END) break;
- if (err == Z_NEED_DICT) {
- if (d_stream.adler != dictId) {
- fprintf(stderr, "unexpected dictionary");
- exit(1);
- }
- err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
- sizeof(dictionary));
- }
- CHECK_ERR(err, "inflate with dict");
- }
-
- err = inflateEnd(&d_stream);
- CHECK_ERR(err, "inflateEnd");
-
- if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad inflate with dict\n");
- exit(1);
- } else {
- printf("inflate with dictionary: %s\n", (char *)uncompr);
- }
-}
-
-/* ===========================================================================
- * Usage: example [output.gz [input.gz]]
- */
-
-int main(argc, argv)
- int argc;
- char *argv[];
-{
- Byte *compr, *uncompr;
- uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
- uLong uncomprLen = comprLen;
- static const char* myVersion = ZLIB_VERSION;
-
- if (zlibVersion()[0] != myVersion[0]) {
- fprintf(stderr, "incompatible zlib version\n");
- exit(1);
-
- } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
- fprintf(stderr, "warning: different zlib version\n");
- }
-
- printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",
- ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());
-
- compr = (Byte*)calloc((uInt)comprLen, 1);
- uncompr = (Byte*)calloc((uInt)uncomprLen, 1);
- /* compr and uncompr are cleared to avoid reading uninitialized
- * data and to ensure that uncompr compresses well.
- */
- if (compr == Z_NULL || uncompr == Z_NULL) {
- printf("out of memory\n");
- exit(1);
- }
- test_compress(compr, comprLen, uncompr, uncomprLen);
-
- test_gzio((argc > 1 ? argv[1] : TESTFILE),
- uncompr, uncomprLen);
-
- test_deflate(compr, comprLen);
- test_inflate(compr, comprLen, uncompr, uncomprLen);
-
- test_large_deflate(compr, comprLen, uncompr, uncomprLen);
- test_large_inflate(compr, comprLen, uncompr, uncomprLen);
-
- test_flush(compr, &comprLen);
- test_sync(compr, comprLen, uncompr, uncomprLen);
- comprLen = uncomprLen;
-
- test_dict_deflate(compr, comprLen);
- test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
-
- free(compr);
- free(uncompr);
-
- return 0;
-}
+++ /dev/null
-/* gzio.c -- IO on .gz files
- * Copyright (C) 1995-2005 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- *
- * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
- */
-
-/* @(#) $Id$ */
-
-#include <stdio.h>
-
-#include "zutil.h"
-
-#ifdef NO_DEFLATE /* for compatibility with old definition */
-# define NO_GZCOMPRESS
-#endif
-
-#ifndef NO_DUMMY_DECL
-struct internal_state {int dummy;}; /* for buggy compilers */
-#endif
-
-#ifndef Z_BUFSIZE
-# ifdef MAXSEG_64K
-# define Z_BUFSIZE 4096 /* minimize memory usage for 16-bit DOS */
-# else
-# define Z_BUFSIZE 16384
-# endif
-#endif
-#ifndef Z_PRINTF_BUFSIZE
-# define Z_PRINTF_BUFSIZE 4096
-#endif
-
-#ifdef __MVS__
-# pragma map (fdopen , "\174\174FDOPEN")
- FILE *fdopen(int, const char *);
-#endif
-
-#ifndef STDC
-extern voidp malloc OF((uInt size));
-extern void free OF((voidpf ptr));
-#endif
-
-#define ALLOC(size) malloc(size)
-#define TRYFREE(p) {if (p) free(p);}
-
-static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
-
-/* gzip flag byte */
-#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
-#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */
-#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
-#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
-#define COMMENT 0x10 /* bit 4 set: file comment present */
-#define RESERVED 0xE0 /* bits 5..7: reserved */
-
-typedef struct gz_stream {
- z_stream stream;
- int z_err; /* error code for last stream operation */
- int z_eof; /* set if end of input file */
- FILE *file; /* .gz file */
- Byte *inbuf; /* input buffer */
- Byte *outbuf; /* output buffer */
- uLong crc; /* crc32 of uncompressed data */
- char *msg; /* error message */
- char *path; /* path name for debugging only */
- int transparent; /* 1 if input file is not a .gz file */
- char mode; /* 'w' or 'r' */
- z_off_t start; /* start of compressed data in file (header skipped) */
- z_off_t in; /* bytes into deflate or inflate */
- z_off_t out; /* bytes out of deflate or inflate */
- int back; /* one character push-back */
- int last; /* true if push-back is last character */
-} gz_stream;
-
-
-local gzFile gz_open OF((const char *path, const char *mode, int fd));
-local int do_flush OF((gzFile file, int flush));
-local int get_byte OF((gz_stream *s));
-local void check_header OF((gz_stream *s));
-local int destroy OF((gz_stream *s));
-local void putLong OF((FILE *file, uLong x));
-local uLong getLong OF((gz_stream *s));
-
-/* ===========================================================================
- Opens a gzip (.gz) file for reading or writing. The mode parameter
- is as in fopen ("rb" or "wb"). The file is given either by file descriptor
- or path name (if fd == -1).
- gz_open returns NULL if the file could not be opened or if there was
- insufficient memory to allocate the (de)compression state; errno
- can be checked to distinguish the two cases (if errno is zero, the
- zlib error is Z_MEM_ERROR).
-*/
-local gzFile gz_open (path, mode, fd)
- const char *path;
- const char *mode;
- int fd;
-{
- int err;
- int level = Z_DEFAULT_COMPRESSION; /* compression level */
- int strategy = Z_DEFAULT_STRATEGY; /* compression strategy */
- char *p = (char*)mode;
- gz_stream *s;
- char fmode[80]; /* copy of mode, without the compression level */
- char *m = fmode;
-
- if (!path || !mode) return Z_NULL;
-
- s = (gz_stream *)ALLOC(sizeof(gz_stream));
- if (!s) return Z_NULL;
-
- s->stream.zalloc = (alloc_func)0;
- s->stream.zfree = (free_func)0;
- s->stream.opaque = (voidpf)0;
- s->stream.next_in = s->inbuf = Z_NULL;
- s->stream.next_out = s->outbuf = Z_NULL;
- s->stream.avail_in = s->stream.avail_out = 0;
- s->file = NULL;
- s->z_err = Z_OK;
- s->z_eof = 0;
- s->in = 0;
- s->out = 0;
- s->back = EOF;
- s->crc = crc32(0L, Z_NULL, 0);
- s->msg = NULL;
- s->transparent = 0;
-
- s->path = (char*)ALLOC(strlen(path)+1);
- if (s->path == NULL) {
- return destroy(s), (gzFile)Z_NULL;
- }
- strcpy(s->path, path); /* do this early for debugging */
-
- s->mode = '\0';
- do {
- if (*p == 'r') s->mode = 'r';
- if (*p == 'w' || *p == 'a') s->mode = 'w';
- if (*p >= '0' && *p <= '9') {
- level = *p - '0';
- } else if (*p == 'f') {
- strategy = Z_FILTERED;
- } else if (*p == 'h') {
- strategy = Z_HUFFMAN_ONLY;
- } else if (*p == 'R') {
- strategy = Z_RLE;
- } else {
- *m++ = *p; /* copy the mode */
- }
- } while (*p++ && m != fmode + sizeof(fmode));
- if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL;
-
- if (s->mode == 'w') {
-#ifdef NO_GZCOMPRESS
- err = Z_STREAM_ERROR;
-#else
- err = deflateInit2(&(s->stream), level,
- Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, strategy);
- /* windowBits is passed < 0 to suppress zlib header */
-
- s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
-#endif
- if (err != Z_OK || s->outbuf == Z_NULL) {
- return destroy(s), (gzFile)Z_NULL;
- }
- } else {
- s->stream.next_in = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE);
-
- err = inflateInit2(&(s->stream), -MAX_WBITS);
- /* windowBits is passed < 0 to tell that there is no zlib header.
- * Note that in this case inflate *requires* an extra "dummy" byte
- * after the compressed stream in order to complete decompression and
- * return Z_STREAM_END. Here the gzip CRC32 ensures that 4 bytes are
- * present after the compressed stream.
- */
- if (err != Z_OK || s->inbuf == Z_NULL) {
- return destroy(s), (gzFile)Z_NULL;
- }
- }
- s->stream.avail_out = Z_BUFSIZE;
-
- errno = 0;
- s->file = fd < 0 ? F_OPEN(path, fmode) : (FILE*)fdopen(fd, fmode);
-
- if (s->file == NULL) {
- return destroy(s), (gzFile)Z_NULL;
- }
- if (s->mode == 'w') {
- /* Write a very simple .gz header:
- */
- fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
- Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
- s->start = 10L;
- /* We use 10L instead of ftell(s->file) to because ftell causes an
- * fflush on some systems. This version of the library doesn't use
- * start anyway in write mode, so this initialization is not
- * necessary.
- */
- } else {
- check_header(s); /* skip the .gz header */
- s->start = ftell(s->file) - s->stream.avail_in;
- }
-
- return (gzFile)s;
-}
-
-/* ===========================================================================
- Opens a gzip (.gz) file for reading or writing.
-*/
-gzFile ZEXPORT gzopen (path, mode)
- const char *path;
- const char *mode;
-{
- return gz_open (path, mode, -1);
-}
-
-/* ===========================================================================
- Associate a gzFile with the file descriptor fd. fd is not dup'ed here
- to mimic the behavio(u)r of fdopen.
-*/
-gzFile ZEXPORT gzdopen (fd, mode)
- int fd;
- const char *mode;
-{
- char name[46]; /* allow for up to 128-bit integers */
-
- if (fd < 0) return (gzFile)Z_NULL;
- sprintf(name, "<fd:%d>", fd); /* for debugging */
-
- return gz_open (name, mode, fd);
-}
-
-/* ===========================================================================
- * Update the compression level and strategy
- */
-int ZEXPORT gzsetparams (file, level, strategy)
- gzFile file;
- int level;
- int strategy;
-{
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
-
- /* Make room to allow flushing */
- if (s->stream.avail_out == 0) {
-
- s->stream.next_out = s->outbuf;
- if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
- s->z_err = Z_ERRNO;
- }
- s->stream.avail_out = Z_BUFSIZE;
- }
-
- return deflateParams (&(s->stream), level, strategy);
-}
-
-/* ===========================================================================
- Read a byte from a gz_stream; update next_in and avail_in. Return EOF
- for end of file.
- IN assertion: the stream s has been sucessfully opened for reading.
-*/
-local int get_byte(s)
- gz_stream *s;
-{
- if (s->z_eof) return EOF;
- if (s->stream.avail_in == 0) {
- errno = 0;
- s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
- if (s->stream.avail_in == 0) {
- s->z_eof = 1;
- if (ferror(s->file)) s->z_err = Z_ERRNO;
- return EOF;
- }
- s->stream.next_in = s->inbuf;
- }
- s->stream.avail_in--;
- return *(s->stream.next_in)++;
-}
-
-/* ===========================================================================
- Check the gzip header of a gz_stream opened for reading. Set the stream
- mode to transparent if the gzip magic header is not present; set s->err
- to Z_DATA_ERROR if the magic header is present but the rest of the header
- is incorrect.
- IN assertion: the stream s has already been created sucessfully;
- s->stream.avail_in is zero for the first time, but may be non-zero
- for concatenated .gz files.
-*/
-local void check_header(s)
- gz_stream *s;
-{
- int method; /* method byte */
- int flags; /* flags byte */
- uInt len;
- int c;
-
- /* Assure two bytes in the buffer so we can peek ahead -- handle case
- where first byte of header is at the end of the buffer after the last
- gzip segment */
- len = s->stream.avail_in;
- if (len < 2) {
- if (len) s->inbuf[0] = s->stream.next_in[0];
- errno = 0;
- len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
- if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
- s->stream.avail_in += len;
- s->stream.next_in = s->inbuf;
- if (s->stream.avail_in < 2) {
- s->transparent = s->stream.avail_in;
- return;
- }
- }
-
- /* Peek ahead to check the gzip magic header */
- if (s->stream.next_in[0] != gz_magic[0] ||
- s->stream.next_in[1] != gz_magic[1]) {
- s->transparent = 1;
- return;
- }
- s->stream.avail_in -= 2;
- s->stream.next_in += 2;
-
- /* Check the rest of the gzip header */
- method = get_byte(s);
- flags = get_byte(s);
- if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
- s->z_err = Z_DATA_ERROR;
- return;
- }
-
- /* Discard time, xflags and OS code: */
- for (len = 0; len < 6; len++) (void)get_byte(s);
-
- if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */
- len = (uInt)get_byte(s);
- len += ((uInt)get_byte(s))<<8;
- /* len is garbage if EOF but the loop below will quit anyway */
- while (len-- != 0 && get_byte(s) != EOF) ;
- }
- if ((flags & ORIG_NAME) != 0) { /* skip the original file name */
- while ((c = get_byte(s)) != 0 && c != EOF) ;
- }
- if ((flags & COMMENT) != 0) { /* skip the .gz file comment */
- while ((c = get_byte(s)) != 0 && c != EOF) ;
- }
- if ((flags & HEAD_CRC) != 0) { /* skip the header crc */
- for (len = 0; len < 2; len++) (void)get_byte(s);
- }
- s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK;
-}
-
- /* ===========================================================================
- * Cleanup then free the given gz_stream. Return a zlib error code.
- Try freeing in the reverse order of allocations.
- */
-local int destroy (s)
- gz_stream *s;
-{
- int err = Z_OK;
-
- if (!s) return Z_STREAM_ERROR;
-
- TRYFREE(s->msg);
-
- if (s->stream.state != NULL) {
- if (s->mode == 'w') {
-#ifdef NO_GZCOMPRESS
- err = Z_STREAM_ERROR;
-#else
- err = deflateEnd(&(s->stream));
-#endif
- } else if (s->mode == 'r') {
- err = inflateEnd(&(s->stream));
- }
- }
- if (s->file != NULL && fclose(s->file)) {
-#ifdef ESPIPE
- if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */
-#endif
- err = Z_ERRNO;
- }
- if (s->z_err < 0) err = s->z_err;
-
- TRYFREE(s->inbuf);
- TRYFREE(s->outbuf);
- TRYFREE(s->path);
- TRYFREE(s);
- return err;
-}
-
-/* ===========================================================================
- Reads the given number of uncompressed bytes from the compressed file.
- gzread returns the number of bytes actually read (0 for end of file).
-*/
-int ZEXPORT gzread (file, buf, len)
- gzFile file;
- voidp buf;
- unsigned len;
-{
- gz_stream *s = (gz_stream*)file;
- Bytef *start = (Bytef*)buf; /* starting point for crc computation */
- Byte *next_out; /* == stream.next_out but not forced far (for MSDOS) */
-
- if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
-
- if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1;
- if (s->z_err == Z_STREAM_END) return 0; /* EOF */
-
- next_out = (Byte*)buf;
- s->stream.next_out = (Bytef*)buf;
- s->stream.avail_out = len;
-
- if (s->stream.avail_out && s->back != EOF) {
- *next_out++ = s->back;
- s->stream.next_out++;
- s->stream.avail_out--;
- s->back = EOF;
- s->out++;
- start++;
- if (s->last) {
- s->z_err = Z_STREAM_END;
- return 1;
- }
- }
-
- while (s->stream.avail_out != 0) {
-
- if (s->transparent) {
- /* Copy first the lookahead bytes: */
- uInt n = s->stream.avail_in;
- if (n > s->stream.avail_out) n = s->stream.avail_out;
- if (n > 0) {
- zmemcpy(s->stream.next_out, s->stream.next_in, n);
- next_out += n;
- s->stream.next_out = next_out;
- s->stream.next_in += n;
- s->stream.avail_out -= n;
- s->stream.avail_in -= n;
- }
- if (s->stream.avail_out > 0) {
- s->stream.avail_out -=
- (uInt)fread(next_out, 1, s->stream.avail_out, s->file);
- }
- len -= s->stream.avail_out;
- s->in += len;
- s->out += len;
- if (len == 0) s->z_eof = 1;
- return (int)len;
- }
- if (s->stream.avail_in == 0 && !s->z_eof) {
-
- errno = 0;
- s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
- if (s->stream.avail_in == 0) {
- s->z_eof = 1;
- if (ferror(s->file)) {
- s->z_err = Z_ERRNO;
- break;
- }
- }
- s->stream.next_in = s->inbuf;
- }
- s->in += s->stream.avail_in;
- s->out += s->stream.avail_out;
- s->z_err = inflate(&(s->stream), Z_NO_FLUSH);
- s->in -= s->stream.avail_in;
- s->out -= s->stream.avail_out;
-
- if (s->z_err == Z_STREAM_END) {
- /* Check CRC and original size */
- s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
- start = s->stream.next_out;
-
- if (getLong(s) != s->crc) {
- s->z_err = Z_DATA_ERROR;
- } else {
- (void)getLong(s);
- /* The uncompressed length returned by above getlong() may be
- * different from s->out in case of concatenated .gz files.
- * Check for such files:
- */
- check_header(s);
- if (s->z_err == Z_OK) {
- inflateReset(&(s->stream));
- s->crc = crc32(0L, Z_NULL, 0);
- }
- }
- }
- if (s->z_err != Z_OK || s->z_eof) break;
- }
- s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
-
- if (len == s->stream.avail_out &&
- (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO))
- return -1;
- return (int)(len - s->stream.avail_out);
-}
-
-
-/* ===========================================================================
- Reads one byte from the compressed file. gzgetc returns this byte
- or -1 in case of end of file or error.
-*/
-int ZEXPORT gzgetc(file)
- gzFile file;
-{
- unsigned char c;
-
- return gzread(file, &c, 1) == 1 ? c : -1;
-}
-
-
-/* ===========================================================================
- Push one byte back onto the stream.
-*/
-int ZEXPORT gzungetc(c, file)
- int c;
- gzFile file;
-{
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL || s->mode != 'r' || c == EOF || s->back != EOF) return EOF;
- s->back = c;
- s->out--;
- s->last = (s->z_err == Z_STREAM_END);
- if (s->last) s->z_err = Z_OK;
- s->z_eof = 0;
- return c;
-}
-
-
-/* ===========================================================================
- Reads bytes from the compressed file until len-1 characters are
- read, or a newline character is read and transferred to buf, or an
- end-of-file condition is encountered. The string is then terminated
- with a null character.
- gzgets returns buf, or Z_NULL in case of error.
-
- The current implementation is not optimized at all.
-*/
-char * ZEXPORT gzgets(file, buf, len)
- gzFile file;
- char *buf;
- int len;
-{
- char *b = buf;
- if (buf == Z_NULL || len <= 0) return Z_NULL;
-
- while (--len > 0 && gzread(file, buf, 1) == 1 && *buf++ != '\n') ;
- *buf = '\0';
- return b == buf && len > 0 ? Z_NULL : b;
-}
-
-
-#ifndef NO_GZCOMPRESS
-/* ===========================================================================
- Writes the given number of uncompressed bytes into the compressed file.
- gzwrite returns the number of bytes actually written (0 in case of error).
-*/
-int ZEXPORT gzwrite (file, buf, len)
- gzFile file;
- voidpc buf;
- unsigned len;
-{
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
-
- s->stream.next_in = (Bytef*)buf;
- s->stream.avail_in = len;
-
- while (s->stream.avail_in != 0) {
-
- if (s->stream.avail_out == 0) {
-
- s->stream.next_out = s->outbuf;
- if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
- s->z_err = Z_ERRNO;
- break;
- }
- s->stream.avail_out = Z_BUFSIZE;
- }
- s->in += s->stream.avail_in;
- s->out += s->stream.avail_out;
- s->z_err = deflate(&(s->stream), Z_NO_FLUSH);
- s->in -= s->stream.avail_in;
- s->out -= s->stream.avail_out;
- if (s->z_err != Z_OK) break;
- }
- s->crc = crc32(s->crc, (const Bytef *)buf, len);
-
- return (int)(len - s->stream.avail_in);
-}
-
-
-/* ===========================================================================
- Converts, formats, and writes the args to the compressed file under
- control of the format string, as in fprintf. gzprintf returns the number of
- uncompressed bytes actually written (0 in case of error).
-*/
-#ifdef STDC
-#include <stdarg.h>
-
-int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
-{
- char buf[Z_PRINTF_BUFSIZE];
- va_list va;
- int len;
-
- buf[sizeof(buf) - 1] = 0;
- va_start(va, format);
-#ifdef NO_vsnprintf
-# ifdef HAS_vsprintf_void
- (void)vsprintf(buf, format, va);
- va_end(va);
- for (len = 0; len < sizeof(buf); len++)
- if (buf[len] == 0) break;
-# else
- len = vsprintf(buf, format, va);
- va_end(va);
-# endif
-#else
-# ifdef HAS_vsnprintf_void
- (void)vsnprintf(buf, sizeof(buf), format, va);
- va_end(va);
- len = strlen(buf);
-# else
- len = vsnprintf(buf, sizeof(buf), format, va);
- va_end(va);
-# endif
-#endif
- if (len <= 0 || len >= (int)sizeof(buf) || buf[sizeof(buf) - 1] != 0)
- return 0;
- return gzwrite(file, buf, (unsigned)len);
-}
-#else /* not ANSI C */
-
-int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
- a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
- gzFile file;
- const char *format;
- int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
- a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
-{
- char buf[Z_PRINTF_BUFSIZE];
- int len;
-
- buf[sizeof(buf) - 1] = 0;
-#ifdef NO_snprintf
-# ifdef HAS_sprintf_void
- sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
- for (len = 0; len < sizeof(buf); len++)
- if (buf[len] == 0) break;
-# else
- len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
-# endif
-#else
-# ifdef HAS_snprintf_void
- snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
- len = strlen(buf);
-# else
- len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
-# endif
-#endif
- if (len <= 0 || len >= sizeof(buf) || buf[sizeof(buf) - 1] != 0)
- return 0;
- return gzwrite(file, buf, len);
-}
-#endif
-
-/* ===========================================================================
- Writes c, converted to an unsigned char, into the compressed file.
- gzputc returns the value that was written, or -1 in case of error.
-*/
-int ZEXPORT gzputc(file, c)
- gzFile file;
- int c;
-{
- unsigned char cc = (unsigned char) c; /* required for big endian systems */
-
- return gzwrite(file, &cc, 1) == 1 ? (int)cc : -1;
-}
-
-
-/* ===========================================================================
- Writes the given null-terminated string to the compressed file, excluding
- the terminating null character.
- gzputs returns the number of characters written, or -1 in case of error.
-*/
-int ZEXPORT gzputs(file, s)
- gzFile file;
- const char *s;
-{
- return gzwrite(file, (char*)s, (unsigned)strlen(s));
-}
-
-
-/* ===========================================================================
- Flushes all pending output into the compressed file. The parameter
- flush is as in the deflate() function.
-*/
-local int do_flush (file, flush)
- gzFile file;
- int flush;
-{
- uInt len;
- int done = 0;
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
-
- s->stream.avail_in = 0; /* should be zero already anyway */
-
- for (;;) {
- len = Z_BUFSIZE - s->stream.avail_out;
-
- if (len != 0) {
- if ((uInt)fwrite(s->outbuf, 1, len, s->file) != len) {
- s->z_err = Z_ERRNO;
- return Z_ERRNO;
- }
- s->stream.next_out = s->outbuf;
- s->stream.avail_out = Z_BUFSIZE;
- }
- if (done) break;
- s->out += s->stream.avail_out;
- s->z_err = deflate(&(s->stream), flush);
- s->out -= s->stream.avail_out;
-
- /* Ignore the second of two consecutive flushes: */
- if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK;
-
- /* deflate has finished flushing only when it hasn't used up
- * all the available space in the output buffer:
- */
- done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END);
-
- if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
- }
- return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
-}
-
-int ZEXPORT gzflush (file, flush)
- gzFile file;
- int flush;
-{
- gz_stream *s = (gz_stream*)file;
- int err = do_flush (file, flush);
-
- if (err) return err;
- fflush(s->file);
- return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
-}
-#endif /* NO_GZCOMPRESS */
-
-/* ===========================================================================
- Sets the starting position for the next gzread or gzwrite on the given
- compressed file. The offset represents a number of bytes in the
- gzseek returns the resulting offset location as measured in bytes from
- the beginning of the uncompressed stream, or -1 in case of error.
- SEEK_END is not implemented, returns error.
- In this version of the library, gzseek can be extremely slow.
-*/
-z_off_t ZEXPORT gzseek (file, offset, whence)
- gzFile file;
- z_off_t offset;
- int whence;
-{
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL || whence == SEEK_END ||
- s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {
- return -1L;
- }
-
- if (s->mode == 'w') {
-#ifdef NO_GZCOMPRESS
- return -1L;
-#else
- if (whence == SEEK_SET) {
- offset -= s->in;
- }
- if (offset < 0) return -1L;
-
- /* At this point, offset is the number of zero bytes to write. */
- if (s->inbuf == Z_NULL) {
- s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
- if (s->inbuf == Z_NULL) return -1L;
- zmemzero(s->inbuf, Z_BUFSIZE);
- }
- while (offset > 0) {
- uInt size = Z_BUFSIZE;
- if (offset < Z_BUFSIZE) size = (uInt)offset;
-
- size = gzwrite(file, s->inbuf, size);
- if (size == 0) return -1L;
-
- offset -= size;
- }
- return s->in;
-#endif
- }
- /* Rest of function is for reading only */
-
- /* compute absolute position */
- if (whence == SEEK_CUR) {
- offset += s->out;
- }
- if (offset < 0) return -1L;
-
- if (s->transparent) {
- /* map to fseek */
- s->back = EOF;
- s->stream.avail_in = 0;
- s->stream.next_in = s->inbuf;
- if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
-
- s->in = s->out = offset;
- return offset;
- }
-
- /* For a negative seek, rewind and use positive seek */
- if (offset >= s->out) {
- offset -= s->out;
- } else if (gzrewind(file) < 0) {
- return -1L;
- }
- /* offset is now the number of bytes to skip. */
-
- if (offset != 0 && s->outbuf == Z_NULL) {
- s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
- if (s->outbuf == Z_NULL) return -1L;
- }
- if (offset && s->back != EOF) {
- s->back = EOF;
- s->out++;
- offset--;
- if (s->last) s->z_err = Z_STREAM_END;
- }
- while (offset > 0) {
- int size = Z_BUFSIZE;
- if (offset < Z_BUFSIZE) size = (int)offset;
-
- size = gzread(file, s->outbuf, (uInt)size);
- if (size <= 0) return -1L;
- offset -= size;
- }
- return s->out;
-}
-
-/* ===========================================================================
- Rewinds input file.
-*/
-int ZEXPORT gzrewind (file)
- gzFile file;
-{
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL || s->mode != 'r') return -1;
-
- s->z_err = Z_OK;
- s->z_eof = 0;
- s->back = EOF;
- s->stream.avail_in = 0;
- s->stream.next_in = s->inbuf;
- s->crc = crc32(0L, Z_NULL, 0);
- if (!s->transparent) (void)inflateReset(&s->stream);
- s->in = 0;
- s->out = 0;
- return fseek(s->file, s->start, SEEK_SET);
-}
-
-/* ===========================================================================
- Returns the starting position for the next gzread or gzwrite on the
- given compressed file. This position represents a number of bytes in the
- uncompressed data stream.
-*/
-z_off_t ZEXPORT gztell (file)
- gzFile file;
-{
- return gzseek(file, 0L, SEEK_CUR);
-}
-
-/* ===========================================================================
- Returns 1 when EOF has previously been detected reading the given
- input stream, otherwise zero.
-*/
-int ZEXPORT gzeof (file)
- gzFile file;
-{
- gz_stream *s = (gz_stream*)file;
-
- /* With concatenated compressed files that can have embedded
- * crc trailers, z_eof is no longer the only/best indicator of EOF
- * on a gz_stream. Handle end-of-stream error explicitly here.
- */
- if (s == NULL || s->mode != 'r') return 0;
- if (s->z_eof) return 1;
- return s->z_err == Z_STREAM_END;
-}
-
-/* ===========================================================================
- Returns 1 if reading and doing so transparently, otherwise zero.
-*/
-int ZEXPORT gzdirect (file)
- gzFile file;
-{
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL || s->mode != 'r') return 0;
- return s->transparent;
-}
-
-/* ===========================================================================
- Outputs a long in LSB order to the given file
-*/
-local void putLong (file, x)
- FILE *file;
- uLong x;
-{
- int n;
- for (n = 0; n < 4; n++) {
- fputc((int)(x & 0xff), file);
- x >>= 8;
- }
-}
-
-/* ===========================================================================
- Reads a long in LSB order from the given gz_stream. Sets z_err in case
- of error.
-*/
-local uLong getLong (s)
- gz_stream *s;
-{
- uLong x = (uLong)get_byte(s);
- int c;
-
- x += ((uLong)get_byte(s))<<8;
- x += ((uLong)get_byte(s))<<16;
- c = get_byte(s);
- if (c == EOF) s->z_err = Z_DATA_ERROR;
- x += ((uLong)c)<<24;
- return x;
-}
-
-/* ===========================================================================
- Flushes all pending output if necessary, closes the compressed file
- and deallocates all the (de)compression state.
-*/
-int ZEXPORT gzclose (file)
- gzFile file;
-{
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL) return Z_STREAM_ERROR;
-
- if (s->mode == 'w') {
-#ifdef NO_GZCOMPRESS
- return Z_STREAM_ERROR;
-#else
- if (do_flush (file, Z_FINISH) != Z_OK)
- return destroy((gz_stream*)file);
-
- putLong (s->file, s->crc);
- putLong (s->file, (uLong)(s->in & 0xffffffff));
-#endif
- }
- return destroy((gz_stream*)file);
-}
-
-#ifdef STDC
-# define zstrerror(errnum) strerror(errnum)
-#else
-# define zstrerror(errnum) ""
-#endif
-
-/* ===========================================================================
- Returns the error message for the last error which occurred on the
- given compressed file. errnum is set to zlib error number. If an
- error occurred in the file system and not in the compression library,
- errnum is set to Z_ERRNO and the application may consult errno
- to get the exact error code.
-*/
-const char * ZEXPORT gzerror (file, errnum)
- gzFile file;
- int *errnum;
-{
- char *m;
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL) {
- *errnum = Z_STREAM_ERROR;
- return (const char*)ERR_MSG(Z_STREAM_ERROR);
- }
- *errnum = s->z_err;
- if (*errnum == Z_OK) return (const char*)"";
-
- m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
-
- if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
-
- TRYFREE(s->msg);
- s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
- if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR);
- strcpy(s->msg, s->path);
- strcat(s->msg, ": ");
- strcat(s->msg, m);
- return (const char*)s->msg;
-}
-
-/* ===========================================================================
- Clear the error and end-of-file flags, and do the same for the real file.
-*/
-void ZEXPORT gzclearerr (file)
- gzFile file;
-{
- gz_stream *s = (gz_stream*)file;
-
- if (s == NULL) return;
- if (s->z_err != Z_STREAM_END) s->z_err = Z_OK;
- s->z_eof = 0;
- clearerr(s->file);
-}
+++ /dev/null
-/* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2005 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- This code is largely copied from inflate.c. Normally either infback.o or
- inflate.o would be linked into an application--not both. The interface
- with inffast.c is retained so that optimized assembler-coded versions of
- inflate_fast() can be used with either inflate.c or infback.c.
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-#include "inflate.h"
-#include "inffast.h"
-
-/* function prototypes */
-local void fixedtables OF((struct inflate_state FAR *state));
-
-/*
- strm provides memory allocation functions in zalloc and zfree, or
- Z_NULL to use the library memory allocation functions.
-
- windowBits is in the range 8..15, and window is a user-supplied
- window and output buffer that is 2**windowBits bytes.
- */
-int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
-z_streamp strm;
-int windowBits;
-unsigned char FAR *window;
-const char *version;
-int stream_size;
-{
- struct inflate_state FAR *state;
-
- if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
- stream_size != (int)(sizeof(z_stream)))
- return Z_VERSION_ERROR;
- if (strm == Z_NULL || window == Z_NULL ||
- windowBits < 8 || windowBits > 15)
- return Z_STREAM_ERROR;
- strm->msg = Z_NULL; /* in case we return an error */
- if (strm->zalloc == (alloc_func)0) {
- strm->zalloc = zcalloc;
- strm->opaque = (voidpf)0;
- }
- if (strm->zfree == (free_func)0) strm->zfree = zcfree;
- state = (struct inflate_state FAR *)ZALLOC(strm, 1,
- sizeof(struct inflate_state));
- if (state == Z_NULL) return Z_MEM_ERROR;
- Tracev((stderr, "inflate: allocated\n"));
- strm->state = (struct internal_state FAR *)state;
- state->dmax = 32768U;
- state->wbits = windowBits;
- state->wsize = 1U << windowBits;
- state->window = window;
- state->write = 0;
- state->whave = 0;
- return Z_OK;
-}
-
-/*
- Return state with length and distance decoding tables and index sizes set to
- fixed code decoding. Normally this returns fixed tables from inffixed.h.
- If BUILDFIXED is defined, then instead this routine builds the tables the
- first time it's called, and returns those tables the first time and
- thereafter. This reduces the size of the code by about 2K bytes, in
- exchange for a little execution time. However, BUILDFIXED should not be
- used for threaded applications, since the rewriting of the tables and virgin
- may not be thread-safe.
- */
-local void fixedtables(state)
-struct inflate_state FAR *state;
-{
-#ifdef BUILDFIXED
- static int virgin = 1;
- static code *lenfix, *distfix;
- static code fixed[544];
-
- /* build fixed huffman tables if first call (may not be thread safe) */
- if (virgin) {
- unsigned sym, bits;
- static code *next;
-
- /* literal/length table */
- sym = 0;
- while (sym < 144) state->lens[sym++] = 8;
- while (sym < 256) state->lens[sym++] = 9;
- while (sym < 280) state->lens[sym++] = 7;
- while (sym < 288) state->lens[sym++] = 8;
- next = fixed;
- lenfix = next;
- bits = 9;
- inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
-
- /* distance table */
- sym = 0;
- while (sym < 32) state->lens[sym++] = 5;
- distfix = next;
- bits = 5;
- inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
-
- /* do this just once */
- virgin = 0;
- }
-#else /* !BUILDFIXED */
-# include "inffixed.h"
-#endif /* BUILDFIXED */
- state->lencode = lenfix;
- state->lenbits = 9;
- state->distcode = distfix;
- state->distbits = 5;
-}
-
-/* Macros for inflateBack(): */
-
-/* Load returned state from inflate_fast() */
-#define LOAD() \
- do { \
- put = strm->next_out; \
- left = strm->avail_out; \
- next = strm->next_in; \
- have = strm->avail_in; \
- hold = state->hold; \
- bits = state->bits; \
- } while (0)
-
-/* Set state from registers for inflate_fast() */
-#define RESTORE() \
- do { \
- strm->next_out = put; \
- strm->avail_out = left; \
- strm->next_in = next; \
- strm->avail_in = have; \
- state->hold = hold; \
- state->bits = bits; \
- } while (0)
-
-/* Clear the input bit accumulator */
-#define INITBITS() \
- do { \
- hold = 0; \
- bits = 0; \
- } while (0)
-
-/* Assure that some input is available. If input is requested, but denied,
- then return a Z_BUF_ERROR from inflateBack(). */
-#define PULL() \
- do { \
- if (have == 0) { \
- have = in(in_desc, &next); \
- if (have == 0) { \
- next = Z_NULL; \
- ret = Z_BUF_ERROR; \
- goto inf_leave; \
- } \
- } \
- } while (0)
-
-/* Get a byte of input into the bit accumulator, or return from inflateBack()
- with an error if there is no input available. */
-#define PULLBYTE() \
- do { \
- PULL(); \
- have--; \
- hold += (unsigned long)(*next++) << bits; \
- bits += 8; \
- } while (0)
-
-/* Assure that there are at least n bits in the bit accumulator. If there is
- not enough available input to do that, then return from inflateBack() with
- an error. */
-#define NEEDBITS(n) \
- do { \
- while (bits < (unsigned)(n)) \
- PULLBYTE(); \
- } while (0)
-
-/* Return the low n bits of the bit accumulator (n < 16) */
-#define BITS(n) \
- ((unsigned)hold & ((1U << (n)) - 1))
-
-/* Remove n bits from the bit accumulator */
-#define DROPBITS(n) \
- do { \
- hold >>= (n); \
- bits -= (unsigned)(n); \
- } while (0)
-
-/* Remove zero to seven bits as needed to go to a byte boundary */
-#define BYTEBITS() \
- do { \
- hold >>= bits & 7; \
- bits -= bits & 7; \
- } while (0)
-
-/* Assure that some output space is available, by writing out the window
- if it's full. If the write fails, return from inflateBack() with a
- Z_BUF_ERROR. */
-#define ROOM() \
- do { \
- if (left == 0) { \
- put = state->window; \
- left = state->wsize; \
- state->whave = left; \
- if (out(out_desc, put, left)) { \
- ret = Z_BUF_ERROR; \
- goto inf_leave; \
- } \
- } \
- } while (0)
-
-/*
- strm provides the memory allocation functions and window buffer on input,
- and provides information on the unused input on return. For Z_DATA_ERROR
- returns, strm will also provide an error message.
-
- in() and out() are the call-back input and output functions. When
- inflateBack() needs more input, it calls in(). When inflateBack() has
- filled the window with output, or when it completes with data in the
- window, it calls out() to write out the data. The application must not
- change the provided input until in() is called again or inflateBack()
- returns. The application must not change the window/output buffer until
- inflateBack() returns.
-
- in() and out() are called with a descriptor parameter provided in the
- inflateBack() call. This parameter can be a structure that provides the
- information required to do the read or write, as well as accumulated
- information on the input and output such as totals and check values.
-
- in() should return zero on failure. out() should return non-zero on
- failure. If either in() or out() fails, than inflateBack() returns a
- Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it
- was in() or out() that caused in the error. Otherwise, inflateBack()
- returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
- error, or Z_MEM_ERROR if it could not allocate memory for the state.
- inflateBack() can also return Z_STREAM_ERROR if the input parameters
- are not correct, i.e. strm is Z_NULL or the state was not initialized.
- */
-int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
-z_streamp strm;
-in_func in;
-void FAR *in_desc;
-out_func out;
-void FAR *out_desc;
-{
- struct inflate_state FAR *state;
- unsigned char FAR *next; /* next input */
- unsigned char FAR *put; /* next output */
- unsigned have, left; /* available input and output */
- unsigned long hold; /* bit buffer */
- unsigned bits; /* bits in bit buffer */
- unsigned copy; /* number of stored or match bytes to copy */
- unsigned char FAR *from; /* where to copy match bytes from */
- code this; /* current decoding table entry */
- code last; /* parent table entry */
- unsigned len; /* length to copy for repeats, bits to drop */
- int ret; /* return code */
- static const unsigned short order[19] = /* permutation of code lengths */
- {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-
- /* Check that the strm exists and that the state was initialized */
- if (strm == Z_NULL || strm->state == Z_NULL)
- return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)strm->state;
-
- /* Reset the state */
- strm->msg = Z_NULL;
- state->mode = TYPE;
- state->last = 0;
- state->whave = 0;
- next = strm->next_in;
- have = next != Z_NULL ? strm->avail_in : 0;
- hold = 0;
- bits = 0;
- put = state->window;
- left = state->wsize;
-
- /* Inflate until end of block marked as last */
- for (;;)
- switch (state->mode) {
- case TYPE:
- /* determine and dispatch block type */
- if (state->last) {
- BYTEBITS();
- state->mode = DONE;
- break;
- }
- NEEDBITS(3);
- state->last = BITS(1);
- DROPBITS(1);
- switch (BITS(2)) {
- case 0: /* stored block */
- Tracev((stderr, "inflate: stored block%s\n",
- state->last ? " (last)" : ""));
- state->mode = STORED;
- break;
- case 1: /* fixed block */
- fixedtables(state);
- Tracev((stderr, "inflate: fixed codes block%s\n",
- state->last ? " (last)" : ""));
- state->mode = LEN; /* decode codes */
- break;
- case 2: /* dynamic block */
- Tracev((stderr, "inflate: dynamic codes block%s\n",
- state->last ? " (last)" : ""));
- state->mode = TABLE;
- break;
- case 3:
- strm->msg = (char *)"invalid block type";
- state->mode = BAD;
- }
- DROPBITS(2);
- break;
-
- case STORED:
- /* get and verify stored block length */
- BYTEBITS(); /* go to byte boundary */
- NEEDBITS(32);
- if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
- strm->msg = (char *)"invalid stored block lengths";
- state->mode = BAD;
- break;
- }
- state->length = (unsigned)hold & 0xffff;
- Tracev((stderr, "inflate: stored length %u\n",
- state->length));
- INITBITS();
-
- /* copy stored block from input to output */
- while (state->length != 0) {
- copy = state->length;
- PULL();
- ROOM();
- if (copy > have) copy = have;
- if (copy > left) copy = left;
- zmemcpy(put, next, copy);
- have -= copy;
- next += copy;
- left -= copy;
- put += copy;
- state->length -= copy;
- }
- Tracev((stderr, "inflate: stored end\n"));
- state->mode = TYPE;
- break;
-
- case TABLE:
- /* get dynamic table entries descriptor */
- NEEDBITS(14);
- state->nlen = BITS(5) + 257;
- DROPBITS(5);
- state->ndist = BITS(5) + 1;
- DROPBITS(5);
- state->ncode = BITS(4) + 4;
- DROPBITS(4);
-#ifndef PKZIP_BUG_WORKAROUND
- if (state->nlen > 286 || state->ndist > 30) {
- strm->msg = (char *)"too many length or distance symbols";
- state->mode = BAD;
- break;
- }
-#endif
- Tracev((stderr, "inflate: table sizes ok\n"));
-
- /* get code length code lengths (not a typo) */
- state->have = 0;
- while (state->have < state->ncode) {
- NEEDBITS(3);
- state->lens[order[state->have++]] = (unsigned short)BITS(3);
- DROPBITS(3);
- }
- while (state->have < 19)
- state->lens[order[state->have++]] = 0;
- state->next = state->codes;
- state->lencode = (code const FAR *)(state->next);
- state->lenbits = 7;
- ret = inflate_table(CODES, state->lens, 19, &(state->next),
- &(state->lenbits), state->work);
- if (ret) {
- strm->msg = (char *)"invalid code lengths set";
- state->mode = BAD;
- break;
- }
- Tracev((stderr, "inflate: code lengths ok\n"));
-
- /* get length and distance code code lengths */
- state->have = 0;
- while (state->have < state->nlen + state->ndist) {
- for (;;) {
- this = state->lencode[BITS(state->lenbits)];
- if ((unsigned)(this.bits) <= bits) break;
- PULLBYTE();
- }
- if (this.val < 16) {
- NEEDBITS(this.bits);
- DROPBITS(this.bits);
- state->lens[state->have++] = this.val;
- }
- else {
- if (this.val == 16) {
- NEEDBITS(this.bits + 2);
- DROPBITS(this.bits);
- if (state->have == 0) {
- strm->msg = (char *)"invalid bit length repeat";
- state->mode = BAD;
- break;
- }
- len = (unsigned)(state->lens[state->have - 1]);
- copy = 3 + BITS(2);
- DROPBITS(2);
- }
- else if (this.val == 17) {
- NEEDBITS(this.bits + 3);
- DROPBITS(this.bits);
- len = 0;
- copy = 3 + BITS(3);
- DROPBITS(3);
- }
- else {
- NEEDBITS(this.bits + 7);
- DROPBITS(this.bits);
- len = 0;
- copy = 11 + BITS(7);
- DROPBITS(7);
- }
- if (state->have + copy > state->nlen + state->ndist) {
- strm->msg = (char *)"invalid bit length repeat";
- state->mode = BAD;
- break;
- }
- while (copy--)
- state->lens[state->have++] = (unsigned short)len;
- }
- }
-
- /* handle error breaks in while */
- if (state->mode == BAD) break;
-
- /* build code tables */
- state->next = state->codes;
- state->lencode = (code const FAR *)(state->next);
- state->lenbits = 9;
- ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
- &(state->lenbits), state->work);
- if (ret) {
- strm->msg = (char *)"invalid literal/lengths set";
- state->mode = BAD;
- break;
- }
- state->distcode = (code const FAR *)(state->next);
- state->distbits = 6;
- ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
- &(state->next), &(state->distbits), state->work);
- if (ret) {
- strm->msg = (char *)"invalid distances set";
- state->mode = BAD;
- break;
- }
- Tracev((stderr, "inflate: codes ok\n"));
- state->mode = LEN;
-
- case LEN:
- /* use inflate_fast() if we have enough input and output */
- if (have >= 6 && left >= 258) {
- RESTORE();
- if (state->whave < state->wsize)
- state->whave = state->wsize - left;
- inflate_fast(strm, state->wsize);
- LOAD();
- break;
- }
-
- /* get a literal, length, or end-of-block code */
- for (;;) {
- this = state->lencode[BITS(state->lenbits)];
- if ((unsigned)(this.bits) <= bits) break;
- PULLBYTE();
- }
- if (this.op && (this.op & 0xf0) == 0) {
- last = this;
- for (;;) {
- this = state->lencode[last.val +
- (BITS(last.bits + last.op) >> last.bits)];
- if ((unsigned)(last.bits + this.bits) <= bits) break;
- PULLBYTE();
- }
- DROPBITS(last.bits);
- }
- DROPBITS(this.bits);
- state->length = (unsigned)this.val;
-
- /* process literal */
- if (this.op == 0) {
- Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
- "inflate: literal '%c'\n" :
- "inflate: literal 0x%02x\n", this.val));
- ROOM();
- *put++ = (unsigned char)(state->length);
- left--;
- state->mode = LEN;
- break;
- }
-
- /* process end of block */
- if (this.op & 32) {
- Tracevv((stderr, "inflate: end of block\n"));
- state->mode = TYPE;
- break;
- }
-
- /* invalid code */
- if (this.op & 64) {
- strm->msg = (char *)"invalid literal/length code";
- state->mode = BAD;
- break;
- }
-
- /* length code -- get extra bits, if any */
- state->extra = (unsigned)(this.op) & 15;
- if (state->extra != 0) {
- NEEDBITS(state->extra);
- state->length += BITS(state->extra);
- DROPBITS(state->extra);
- }
- Tracevv((stderr, "inflate: length %u\n", state->length));
-
- /* get distance code */
- for (;;) {
- this = state->distcode[BITS(state->distbits)];
- if ((unsigned)(this.bits) <= bits) break;
- PULLBYTE();
- }
- if ((this.op & 0xf0) == 0) {
- last = this;
- for (;;) {
- this = state->distcode[last.val +
- (BITS(last.bits + last.op) >> last.bits)];
- if ((unsigned)(last.bits + this.bits) <= bits) break;
- PULLBYTE();
- }
- DROPBITS(last.bits);
- }
- DROPBITS(this.bits);
- if (this.op & 64) {
- strm->msg = (char *)"invalid distance code";
- state->mode = BAD;
- break;
- }
- state->offset = (unsigned)this.val;
-
- /* get distance extra bits, if any */
- state->extra = (unsigned)(this.op) & 15;
- if (state->extra != 0) {
- NEEDBITS(state->extra);
- state->offset += BITS(state->extra);
- DROPBITS(state->extra);
- }
- if (state->offset > state->wsize - (state->whave < state->wsize ?
- left : 0)) {
- strm->msg = (char *)"invalid distance too far back";
- state->mode = BAD;
- break;
- }
- Tracevv((stderr, "inflate: distance %u\n", state->offset));
-
- /* copy match from window to output */
- do {
- ROOM();
- copy = state->wsize - state->offset;
- if (copy < left) {
- from = put + copy;
- copy = left - copy;
- }
- else {
- from = put - state->offset;
- copy = left;
- }
- if (copy > state->length) copy = state->length;
- state->length -= copy;
- left -= copy;
- do {
- *put++ = *from++;
- } while (--copy);
- } while (state->length != 0);
- break;
-
- case DONE:
- /* inflate stream terminated properly -- write leftover output */
- ret = Z_STREAM_END;
- if (left < state->wsize) {
- if (out(out_desc, state->window, state->wsize - left))
- ret = Z_BUF_ERROR;
- }
- goto inf_leave;
-
- case BAD:
- ret = Z_DATA_ERROR;
- goto inf_leave;
-
- default: /* can't happen, but makes compilers happy */
- ret = Z_STREAM_ERROR;
- goto inf_leave;
- }
-
- /* Return unused input */
- inf_leave:
- strm->next_in = next;
- strm->avail_in = have;
- return ret;
-}
-
-int ZEXPORT inflateBackEnd(strm)
-z_streamp strm;
-{
- if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
- return Z_STREAM_ERROR;
- ZFREE(strm, strm->state);
- strm->state = Z_NULL;
- Tracev((stderr, "inflate: end\n"));
- return Z_OK;
-}
+++ /dev/null
-/* inffast.c -- fast decoding
- * Copyright (C) 1995-2004 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-#include "inflate.h"
-#include "inffast.h"
-
-#ifndef ASMINF
-
-/* Allow machine dependent optimization for post-increment or pre-increment.
- Based on testing to date,
- Pre-increment preferred for:
- - PowerPC G3 (Adler)
- - MIPS R5000 (Randers-Pehrson)
- Post-increment preferred for:
- - none
- No measurable difference:
- - Pentium III (Anderson)
- - M68060 (Nikl)
- */
-#ifdef POSTINC
-# define OFF 0
-# define PUP(a) *(a)++
-#else
-# define OFF 1
-# define PUP(a) *++(a)
-#endif
-
-/*
- Decode literal, length, and distance codes and write out the resulting
- literal and match bytes until either not enough input or output is
- available, an end-of-block is encountered, or a data error is encountered.
- When large enough input and output buffers are supplied to inflate(), for
- example, a 16K input buffer and a 64K output buffer, more than 95% of the
- inflate execution time is spent in this routine.
-
- Entry assumptions:
-
- state->mode == LEN
- strm->avail_in >= 6
- strm->avail_out >= 258
- start >= strm->avail_out
- state->bits < 8
-
- On return, state->mode is one of:
-
- LEN -- ran out of enough output space or enough available input
- TYPE -- reached end of block code, inflate() to interpret next block
- BAD -- error in block data
-
- Notes:
-
- - The maximum input bits used by a length/distance pair is 15 bits for the
- length code, 5 bits for the length extra, 15 bits for the distance code,
- and 13 bits for the distance extra. This totals 48 bits, or six bytes.
- Therefore if strm->avail_in >= 6, then there is enough input to avoid
- checking for available input while decoding.
-
- - The maximum bytes that a single length/distance pair can output is 258
- bytes, which is the maximum length that can be coded. inflate_fast()
- requires strm->avail_out >= 258 for each loop to avoid checking for
- output space.
- */
-void inflate_fast(strm, start)
-z_streamp strm;
-unsigned start; /* inflate()'s starting value for strm->avail_out */
-{
- struct inflate_state FAR *state;
- unsigned char FAR *in; /* local strm->next_in */
- unsigned char FAR *last; /* while in < last, enough input available */
- unsigned char FAR *out; /* local strm->next_out */
- unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
- unsigned char FAR *end; /* while out < end, enough space available */
-#ifdef INFLATE_STRICT
- unsigned dmax; /* maximum distance from zlib header */
-#endif
- unsigned wsize; /* window size or zero if not using window */
- unsigned whave; /* valid bytes in the window */
- unsigned write; /* window write index */
- unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */
- unsigned long hold; /* local strm->hold */
- unsigned bits; /* local strm->bits */
- code const FAR *lcode; /* local strm->lencode */
- code const FAR *dcode; /* local strm->distcode */
- unsigned lmask; /* mask for first level of length codes */
- unsigned dmask; /* mask for first level of distance codes */
- code this; /* retrieved table entry */
- unsigned op; /* code bits, operation, extra bits, or */
- /* window position, window bytes to copy */
- unsigned len; /* match length, unused bytes */
- unsigned dist; /* match distance */
- unsigned char FAR *from; /* where to copy match from */
-
- /* copy state to local variables */
- state = (struct inflate_state FAR *)strm->state;
- in = strm->next_in - OFF;
- last = in + (strm->avail_in - 5);
- out = strm->next_out - OFF;
- beg = out - (start - strm->avail_out);
- end = out + (strm->avail_out - 257);
-#ifdef INFLATE_STRICT
- dmax = state->dmax;
-#endif
- wsize = state->wsize;
- whave = state->whave;
- write = state->write;
- window = state->window;
- hold = state->hold;
- bits = state->bits;
- lcode = state->lencode;
- dcode = state->distcode;
- lmask = (1U << state->lenbits) - 1;
- dmask = (1U << state->distbits) - 1;
-
- /* decode literals and length/distances until end-of-block or not enough
- input data or output space */
- do {
- if (bits < 15) {
- hold += (unsigned long)(PUP(in)) << bits;
- bits += 8;
- hold += (unsigned long)(PUP(in)) << bits;
- bits += 8;
- }
- this = lcode[hold & lmask];
- dolen:
- op = (unsigned)(this.bits);
- hold >>= op;
- bits -= op;
- op = (unsigned)(this.op);
- if (op == 0) { /* literal */
- Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
- "inflate: literal '%c'\n" :
- "inflate: literal 0x%02x\n", this.val));
- PUP(out) = (unsigned char)(this.val);
- }
- else if (op & 16) { /* length base */
- len = (unsigned)(this.val);
- op &= 15; /* number of extra bits */
- if (op) {
- if (bits < op) {
- hold += (unsigned long)(PUP(in)) << bits;
- bits += 8;
- }
- len += (unsigned)hold & ((1U << op) - 1);
- hold >>= op;
- bits -= op;
- }
- Tracevv((stderr, "inflate: length %u\n", len));
- if (bits < 15) {
- hold += (unsigned long)(PUP(in)) << bits;
- bits += 8;
- hold += (unsigned long)(PUP(in)) << bits;
- bits += 8;
- }
- this = dcode[hold & dmask];
- dodist:
- op = (unsigned)(this.bits);
- hold >>= op;
- bits -= op;
- op = (unsigned)(this.op);
- if (op & 16) { /* distance base */
- dist = (unsigned)(this.val);
- op &= 15; /* number of extra bits */
- if (bits < op) {
- hold += (unsigned long)(PUP(in)) << bits;
- bits += 8;
- if (bits < op) {
- hold += (unsigned long)(PUP(in)) << bits;
- bits += 8;
- }
- }
- dist += (unsigned)hold & ((1U << op) - 1);
-#ifdef INFLATE_STRICT
- if (dist > dmax) {
- strm->msg = (char *)"invalid distance too far back";
- state->mode = BAD;
- break;
- }
-#endif
- hold >>= op;
- bits -= op;
- Tracevv((stderr, "inflate: distance %u\n", dist));
- op = (unsigned)(out - beg); /* max distance in output */
- if (dist > op) { /* see if copy from window */
- op = dist - op; /* distance back in window */
- if (op > whave) {
- strm->msg = (char *)"invalid distance too far back";
- state->mode = BAD;
- break;
- }
- from = window - OFF;
- if (write == 0) { /* very common case */
- from += wsize - op;
- if (op < len) { /* some from window */
- len -= op;
- do {
- PUP(out) = PUP(from);
- } while (--op);
- from = out - dist; /* rest from output */
- }
- }
- else if (write < op) { /* wrap around window */
- from += wsize + write - op;
- op -= write;
- if (op < len) { /* some from end of window */
- len -= op;
- do {
- PUP(out) = PUP(from);
- } while (--op);
- from = window - OFF;
- if (write < len) { /* some from start of window */
- op = write;
- len -= op;
- do {
- PUP(out) = PUP(from);
- } while (--op);
- from = out - dist; /* rest from output */
- }
- }
- }
- else { /* contiguous in window */
- from += write - op;
- if (op < len) { /* some from window */
- len -= op;
- do {
- PUP(out) = PUP(from);
- } while (--op);
- from = out - dist; /* rest from output */
- }
- }
- while (len > 2) {
- PUP(out) = PUP(from);
- PUP(out) = PUP(from);
- PUP(out) = PUP(from);
- len -= 3;
- }
- if (len) {
- PUP(out) = PUP(from);
- if (len > 1)
- PUP(out) = PUP(from);
- }
- }
- else {
- from = out - dist; /* copy direct from output */
- do { /* minimum length is three */
- PUP(out) = PUP(from);
- PUP(out) = PUP(from);
- PUP(out) = PUP(from);
- len -= 3;
- } while (len > 2);
- if (len) {
- PUP(out) = PUP(from);
- if (len > 1)
- PUP(out) = PUP(from);
- }
- }
- }
- else if ((op & 64) == 0) { /* 2nd level distance code */
- this = dcode[this.val + (hold & ((1U << op) - 1))];
- goto dodist;
- }
- else {
- strm->msg = (char *)"invalid distance code";
- state->mode = BAD;
- break;
- }
- }
- else if ((op & 64) == 0) { /* 2nd level length code */
- this = lcode[this.val + (hold & ((1U << op) - 1))];
- goto dolen;
- }
- else if (op & 32) { /* end-of-block */
- Tracevv((stderr, "inflate: end of block\n"));
- state->mode = TYPE;
- break;
- }
- else {
- strm->msg = (char *)"invalid literal/length code";
- state->mode = BAD;
- break;
- }
- } while (in < last && out < end);
-
- /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
- len = bits >> 3;
- in -= len;
- bits -= len << 3;
- hold &= (1U << bits) - 1;
-
- /* update state and return */
- strm->next_in = in + OFF;
- strm->next_out = out + OFF;
- strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
- strm->avail_out = (unsigned)(out < end ?
- 257 + (end - out) : 257 - (out - end));
- state->hold = hold;
- state->bits = bits;
- return;
-}
-
-/*
- inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe):
- - Using bit fields for code structure
- - Different op definition to avoid & for extra bits (do & for table bits)
- - Three separate decoding do-loops for direct, window, and write == 0
- - Special case for distance > 1 copies to do overlapped load and store copy
- - Explicit branch predictions (based on measured branch probabilities)
- - Deferring match copy and interspersed it with decoding subsequent codes
- - Swapping literal/length else
- - Swapping window/direct else
- - Larger unrolled copy loops (three is about right)
- - Moving len -= 3 statement into middle of loop
- */
-
-#endif /* !ASMINF */
+++ /dev/null
-/* inffast.h -- header to use inffast.c
- * Copyright (C) 1995-2003 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-void inflate_fast OF((z_streamp strm, unsigned start));
+++ /dev/null
- /* inffixed.h -- table for decoding fixed codes
- * Generated automatically by makefixed().
- */
-
- /* WARNING: this file should *not* be used by applications. It
- is part of the implementation of the compression library and
- is subject to change. Applications should only use zlib.h.
- */
-
- static const code lenfix[512] = {
- {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},
- {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},
- {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},
- {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},
- {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},
- {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},
- {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},
- {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},
- {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},
- {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},
- {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},
- {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},
- {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},
- {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},
- {0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},
- {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},
- {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},
- {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
- {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},
- {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},
- {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},
- {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},
- {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},
- {0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202},
- {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},
- {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},
- {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},
- {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},
- {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},
- {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},
- {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},
- {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},
- {16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55},
- {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},
- {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},
- {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},
- {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},
- {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},
- {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},
- {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},
- {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},
- {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},
- {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},
- {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},
- {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},
- {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},
- {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},
- {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
- {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},
- {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},
- {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51},
- {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},
- {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},
- {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},
- {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},
- {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},
- {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},
- {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},
- {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},
- {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258},
- {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},
- {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},
- {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},
- {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},
- {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},
- {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
- {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},
- {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},
- {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},
- {64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},
- {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},
- {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},
- {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},
- {0,9,255}
- };
-
- static const code distfix[32] = {
- {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},
- {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},
- {18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385},
- {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},
- {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},
- {22,5,193},{64,5,0}
- };
+++ /dev/null
-/* inflate.c -- zlib decompression
- * Copyright (C) 1995-2005 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- * Change history:
- *
- * 1.2.beta0 24 Nov 2002
- * - First version -- complete rewrite of inflate to simplify code, avoid
- * creation of window when not needed, minimize use of window when it is
- * needed, make inffast.c even faster, implement gzip decoding, and to
- * improve code readability and style over the previous zlib inflate code
- *
- * 1.2.beta1 25 Nov 2002
- * - Use pointers for available input and output checking in inffast.c
- * - Remove input and output counters in inffast.c
- * - Change inffast.c entry and loop from avail_in >= 7 to >= 6
- * - Remove unnecessary second byte pull from length extra in inffast.c
- * - Unroll direct copy to three copies per loop in inffast.c
- *
- * 1.2.beta2 4 Dec 2002
- * - Change external routine names to reduce potential conflicts
- * - Correct filename to inffixed.h for fixed tables in inflate.c
- * - Make hbuf[] unsigned char to match parameter type in inflate.c
- * - Change strm->next_out[-state->offset] to *(strm->next_out - state->offset)
- * to avoid negation problem on Alphas (64 bit) in inflate.c
- *
- * 1.2.beta3 22 Dec 2002
- * - Add comments on state->bits assertion in inffast.c
- * - Add comments on op field in inftrees.h
- * - Fix bug in reuse of allocated window after inflateReset()
- * - Remove bit fields--back to byte structure for speed
- * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
- * - Change post-increments to pre-increments in inflate_fast(), PPC biased?
- * - Add compile time option, POSTINC, to use post-increments instead (Intel?)
- * - Make MATCH copy in inflate() much faster for when inflate_fast() not used
- * - Use local copies of stream next and avail values, as well as local bit
- * buffer and bit count in inflate()--for speed when inflate_fast() not used
- *
- * 1.2.beta4 1 Jan 2003
- * - Split ptr - 257 statements in inflate_table() to avoid compiler warnings
- * - Move a comment on output buffer sizes from inffast.c to inflate.c
- * - Add comments in inffast.c to introduce the inflate_fast() routine
- * - Rearrange window copies in inflate_fast() for speed and simplification
- * - Unroll last copy for window match in inflate_fast()
- * - Use local copies of window variables in inflate_fast() for speed
- * - Pull out common write == 0 case for speed in inflate_fast()
- * - Make op and len in inflate_fast() unsigned for consistency
- * - Add FAR to lcode and dcode declarations in inflate_fast()
- * - Simplified bad distance check in inflate_fast()
- * - Added inflateBackInit(), inflateBack(), and inflateBackEnd() in new
- * source file infback.c to provide a call-back interface to inflate for
- * programs like gzip and unzip -- uses window as output buffer to avoid
- * window copying
- *
- * 1.2.beta5 1 Jan 2003
- * - Improved inflateBack() interface to allow the caller to provide initial
- * input in strm.
- * - Fixed stored blocks bug in inflateBack()
- *
- * 1.2.beta6 4 Jan 2003
- * - Added comments in inffast.c on effectiveness of POSTINC
- * - Typecasting all around to reduce compiler warnings
- * - Changed loops from while (1) or do {} while (1) to for (;;), again to
- * make compilers happy
- * - Changed type of window in inflateBackInit() to unsigned char *
- *
- * 1.2.beta7 27 Jan 2003
- * - Changed many types to unsigned or unsigned short to avoid warnings
- * - Added inflateCopy() function
- *
- * 1.2.0 9 Mar 2003
- * - Changed inflateBack() interface to provide separate opaque descriptors
- * for the in() and out() functions
- * - Changed inflateBack() argument and in_func typedef to swap the length
- * and buffer address return values for the input function
- * - Check next_in and next_out for Z_NULL on entry to inflate()
- *
- * The history for versions after 1.2.0 are in ChangeLog in zlib distribution.
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-#include "inflate.h"
-#include "inffast.h"
-
-#ifdef MAKEFIXED
-# ifndef BUILDFIXED
-# define BUILDFIXED
-# endif
-#endif
-
-/* function prototypes */
-local void fixedtables OF((struct inflate_state FAR *state));
-local int updatewindow OF((z_streamp strm, unsigned out));
-#ifdef BUILDFIXED
- void makefixed OF((void));
-#endif
-local unsigned syncsearch OF((unsigned FAR *have, unsigned char FAR *buf,
- unsigned len));
-
-int ZEXPORT inflateReset(strm)
-z_streamp strm;
-{
- struct inflate_state FAR *state;
-
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)strm->state;
- strm->total_in = strm->total_out = state->total = 0;
- strm->msg = Z_NULL;
- strm->adler = 1; /* to support ill-conceived Java test suite */
- state->mode = HEAD;
- state->last = 0;
- state->havedict = 0;
- state->dmax = 32768U;
- state->head = Z_NULL;
- state->wsize = 0;
- state->whave = 0;
- state->write = 0;
- state->hold = 0;
- state->bits = 0;
- state->lencode = state->distcode = state->next = state->codes;
- Tracev((stderr, "inflate: reset\n"));
- return Z_OK;
-}
-
-int ZEXPORT inflatePrime(strm, bits, value)
-z_streamp strm;
-int bits;
-int value;
-{
- struct inflate_state FAR *state;
-
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)strm->state;
- if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
- value &= (1L << bits) - 1;
- state->hold += value << state->bits;
- state->bits += bits;
- return Z_OK;
-}
-
-int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size)
-z_streamp strm;
-int windowBits;
-const char *version;
-int stream_size;
-{
- struct inflate_state FAR *state;
-
- if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
- stream_size != (int)(sizeof(z_stream)))
- return Z_VERSION_ERROR;
- if (strm == Z_NULL) return Z_STREAM_ERROR;
- strm->msg = Z_NULL; /* in case we return an error */
- if (strm->zalloc == (alloc_func)0) {
- strm->zalloc = zcalloc;
- strm->opaque = (voidpf)0;
- }
- if (strm->zfree == (free_func)0) strm->zfree = zcfree;
- state = (struct inflate_state FAR *)
- ZALLOC(strm, 1, sizeof(struct inflate_state));
- if (state == Z_NULL) return Z_MEM_ERROR;
- Tracev((stderr, "inflate: allocated\n"));
- strm->state = (struct internal_state FAR *)state;
- if (windowBits < 0) {
- state->wrap = 0;
- windowBits = -windowBits;
- }
- else {
- state->wrap = (windowBits >> 4) + 1;
-#ifdef GUNZIP
- if (windowBits < 48) windowBits &= 15;
-#endif
- }
- if (windowBits < 8 || windowBits > 15) {
- ZFREE(strm, state);
- strm->state = Z_NULL;
- return Z_STREAM_ERROR;
- }
- state->wbits = (unsigned)windowBits;
- state->window = Z_NULL;
- return inflateReset(strm);
-}
-
-int ZEXPORT inflateInit_(strm, version, stream_size)
-z_streamp strm;
-const char *version;
-int stream_size;
-{
- return inflateInit2_(strm, DEF_WBITS, version, stream_size);
-}
-
-/*
- Return state with length and distance decoding tables and index sizes set to
- fixed code decoding. Normally this returns fixed tables from inffixed.h.
- If BUILDFIXED is defined, then instead this routine builds the tables the
- first time it's called, and returns those tables the first time and
- thereafter. This reduces the size of the code by about 2K bytes, in
- exchange for a little execution time. However, BUILDFIXED should not be
- used for threaded applications, since the rewriting of the tables and virgin
- may not be thread-safe.
- */
-local void fixedtables(state)
-struct inflate_state FAR *state;
-{
-#ifdef BUILDFIXED
- static int virgin = 1;
- static code *lenfix, *distfix;
- static code fixed[544];
-
- /* build fixed huffman tables if first call (may not be thread safe) */
- if (virgin) {
- unsigned sym, bits;
- static code *next;
-
- /* literal/length table */
- sym = 0;
- while (sym < 144) state->lens[sym++] = 8;
- while (sym < 256) state->lens[sym++] = 9;
- while (sym < 280) state->lens[sym++] = 7;
- while (sym < 288) state->lens[sym++] = 8;
- next = fixed;
- lenfix = next;
- bits = 9;
- inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
-
- /* distance table */
- sym = 0;
- while (sym < 32) state->lens[sym++] = 5;
- distfix = next;
- bits = 5;
- inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
-
- /* do this just once */
- virgin = 0;
- }
-#else /* !BUILDFIXED */
-# include "inffixed.h"
-#endif /* BUILDFIXED */
- state->lencode = lenfix;
- state->lenbits = 9;
- state->distcode = distfix;
- state->distbits = 5;
-}
-
-#ifdef MAKEFIXED
-#include <stdio.h>
-
-/*
- Write out the inffixed.h that is #include'd above. Defining MAKEFIXED also
- defines BUILDFIXED, so the tables are built on the fly. makefixed() writes
- those tables to stdout, which would be piped to inffixed.h. A small program
- can simply call makefixed to do this:
-
- void makefixed(void);
-
- int main(void)
- {
- makefixed();
- return 0;
- }
-
- Then that can be linked with zlib built with MAKEFIXED defined and run:
-
- a.out > inffixed.h
- */
-void makefixed()
-{
- unsigned low, size;
- struct inflate_state state;
-
- fixedtables(&state);
- puts(" /* inffixed.h -- table for decoding fixed codes");
- puts(" * Generated automatically by makefixed().");
- puts(" */");
- puts("");
- puts(" /* WARNING: this file should *not* be used by applications.");
- puts(" It is part of the implementation of this library and is");
- puts(" subject to change. Applications should only use zlib.h.");
- puts(" */");
- puts("");
- size = 1U << 9;
- printf(" static const code lenfix[%u] = {", size);
- low = 0;
- for (;;) {
- if ((low % 7) == 0) printf("\n ");
- printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits,
- state.lencode[low].val);
- if (++low == size) break;
- putchar(',');
- }
- puts("\n };");
- size = 1U << 5;
- printf("\n static const code distfix[%u] = {", size);
- low = 0;
- for (;;) {
- if ((low % 6) == 0) printf("\n ");
- printf("{%u,%u,%d}", state.distcode[low].op, state.distcode[low].bits,
- state.distcode[low].val);
- if (++low == size) break;
- putchar(',');
- }
- puts("\n };");
-}
-#endif /* MAKEFIXED */
-
-/*
- Update the window with the last wsize (normally 32K) bytes written before
- returning. If window does not exist yet, create it. This is only called
- when a window is already in use, or when output has been written during this
- inflate call, but the end of the deflate stream has not been reached yet.
- It is also called to create a window for dictionary data when a dictionary
- is loaded.
-
- Providing output buffers larger than 32K to inflate() should provide a speed
- advantage, since only the last 32K of output is copied to the sliding window
- upon return from inflate(), and since all distances after the first 32K of
- output will fall in the output data, making match copies simpler and faster.
- The advantage may be dependent on the size of the processor's data caches.
- */
-local int updatewindow(strm, out)
-z_streamp strm;
-unsigned out;
-{
- struct inflate_state FAR *state;
- unsigned copy, dist;
-
- state = (struct inflate_state FAR *)strm->state;
-
- /* if it hasn't been done already, allocate space for the window */
- if (state->window == Z_NULL) {
- state->window = (unsigned char FAR *)
- ZALLOC(strm, 1U << state->wbits,
- sizeof(unsigned char));
- if (state->window == Z_NULL) return 1;
- }
-
- /* if window not in use yet, initialize */
- if (state->wsize == 0) {
- state->wsize = 1U << state->wbits;
- state->write = 0;
- state->whave = 0;
- }
-
- /* copy state->wsize or less output bytes into the circular window */
- copy = out - strm->avail_out;
- if (copy >= state->wsize) {
- zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
- state->write = 0;
- state->whave = state->wsize;
- }
- else {
- dist = state->wsize - state->write;
- if (dist > copy) dist = copy;
- zmemcpy(state->window + state->write, strm->next_out - copy, dist);
- copy -= dist;
- if (copy) {
- zmemcpy(state->window, strm->next_out - copy, copy);
- state->write = copy;
- state->whave = state->wsize;
- }
- else {
- state->write += dist;
- if (state->write == state->wsize) state->write = 0;
- if (state->whave < state->wsize) state->whave += dist;
- }
- }
- return 0;
-}
-
-/* Macros for inflate(): */
-
-/* check function to use adler32() for zlib or crc32() for gzip */
-#ifdef GUNZIP
-# define UPDATE(check, buf, len) \
- (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
-#else
-# define UPDATE(check, buf, len) adler32(check, buf, len)
-#endif
-
-/* check macros for header crc */
-#ifdef GUNZIP
-# define CRC2(check, word) \
- do { \
- hbuf[0] = (unsigned char)(word); \
- hbuf[1] = (unsigned char)((word) >> 8); \
- check = crc32(check, hbuf, 2); \
- } while (0)
-
-# define CRC4(check, word) \
- do { \
- hbuf[0] = (unsigned char)(word); \
- hbuf[1] = (unsigned char)((word) >> 8); \
- hbuf[2] = (unsigned char)((word) >> 16); \
- hbuf[3] = (unsigned char)((word) >> 24); \
- check = crc32(check, hbuf, 4); \
- } while (0)
-#endif
-
-/* Load registers with state in inflate() for speed */
-#define LOAD() \
- do { \
- put = strm->next_out; \
- left = strm->avail_out; \
- next = strm->next_in; \
- have = strm->avail_in; \
- hold = state->hold; \
- bits = state->bits; \
- } while (0)
-
-/* Restore state from registers in inflate() */
-#define RESTORE() \
- do { \
- strm->next_out = put; \
- strm->avail_out = left; \
- strm->next_in = next; \
- strm->avail_in = have; \
- state->hold = hold; \
- state->bits = bits; \
- } while (0)
-
-/* Clear the input bit accumulator */
-#define INITBITS() \
- do { \
- hold = 0; \
- bits = 0; \
- } while (0)
-
-/* Get a byte of input into the bit accumulator, or return from inflate()
- if there is no input available. */
-#define PULLBYTE() \
- do { \
- if (have == 0) goto inf_leave; \
- have--; \
- hold += (unsigned long)(*next++) << bits; \
- bits += 8; \
- } while (0)
-
-/* Assure that there are at least n bits in the bit accumulator. If there is
- not enough available input to do that, then return from inflate(). */
-#define NEEDBITS(n) \
- do { \
- while (bits < (unsigned)(n)) \
- PULLBYTE(); \
- } while (0)
-
-/* Return the low n bits of the bit accumulator (n < 16) */
-#define BITS(n) \
- ((unsigned)hold & ((1U << (n)) - 1))
-
-/* Remove n bits from the bit accumulator */
-#define DROPBITS(n) \
- do { \
- hold >>= (n); \
- bits -= (unsigned)(n); \
- } while (0)
-
-/* Remove zero to seven bits as needed to go to a byte boundary */
-#define BYTEBITS() \
- do { \
- hold >>= bits & 7; \
- bits -= bits & 7; \
- } while (0)
-
-/* Reverse the bytes in a 32-bit value */
-#define REVERSE(q) \
- ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
- (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
-
-/*
- inflate() uses a state machine to process as much input data and generate as
- much output data as possible before returning. The state machine is
- structured roughly as follows:
-
- for (;;) switch (state) {
- ...
- case STATEn:
- if (not enough input data or output space to make progress)
- return;
- ... make progress ...
- state = STATEm;
- break;
- ...
- }
-
- so when inflate() is called again, the same case is attempted again, and
- if the appropriate resources are provided, the machine proceeds to the
- next state. The NEEDBITS() macro is usually the way the state evaluates
- whether it can proceed or should return. NEEDBITS() does the return if
- the requested bits are not available. The typical use of the BITS macros
- is:
-
- NEEDBITS(n);
- ... do something with BITS(n) ...
- DROPBITS(n);
-
- where NEEDBITS(n) either returns from inflate() if there isn't enough
- input left to load n bits into the accumulator, or it continues. BITS(n)
- gives the low n bits in the accumulator. When done, DROPBITS(n) drops
- the low n bits off the accumulator. INITBITS() clears the accumulator
- and sets the number of available bits to zero. BYTEBITS() discards just
- enough bits to put the accumulator on a byte boundary. After BYTEBITS()
- and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
-
- NEEDBITS(n) uses PULLBYTE() to get an available byte of input, or to return
- if there is no input available. The decoding of variable length codes uses
- PULLBYTE() directly in order to pull just enough bytes to decode the next
- code, and no more.
-
- Some states loop until they get enough input, making sure that enough
- state information is maintained to continue the loop where it left off
- if NEEDBITS() returns in the loop. For example, want, need, and keep
- would all have to actually be part of the saved state in case NEEDBITS()
- returns:
-
- case STATEw:
- while (want < need) {
- NEEDBITS(n);
- keep[want++] = BITS(n);
- DROPBITS(n);
- }
- state = STATEx;
- case STATEx:
-
- As shown above, if the next state is also the next case, then the break
- is omitted.
-
- A state may also return if there is not enough output space available to
- complete that state. Those states are copying stored data, writing a
- literal byte, and copying a matching string.
-
- When returning, a "goto inf_leave" is used to update the total counters,
- update the check value, and determine whether any progress has been made
- during that inflate() call in order to return the proper return code.
- Progress is defined as a change in either strm->avail_in or strm->avail_out.
- When there is a window, goto inf_leave will update the window with the last
- output written. If a goto inf_leave occurs in the middle of decompression
- and there is no window currently, goto inf_leave will create one and copy
- output to the window for the next call of inflate().
-
- In this implementation, the flush parameter of inflate() only affects the
- return code (per zlib.h). inflate() always writes as much as possible to
- strm->next_out, given the space available and the provided input--the effect
- documented in zlib.h of Z_SYNC_FLUSH. Furthermore, inflate() always defers
- the allocation of and copying into a sliding window until necessary, which
- provides the effect documented in zlib.h for Z_FINISH when the entire input
- stream available. So the only thing the flush parameter actually does is:
- when flush is set to Z_FINISH, inflate() cannot return Z_OK. Instead it
- will return Z_BUF_ERROR if it has not reached the end of the stream.
- */
-
-int ZEXPORT inflate(strm, flush)
-z_streamp strm;
-int flush;
-{
- struct inflate_state FAR *state;
- unsigned char FAR *next; /* next input */
- unsigned char FAR *put; /* next output */
- unsigned have, left; /* available input and output */
- unsigned long hold; /* bit buffer */
- unsigned bits; /* bits in bit buffer */
- unsigned in, out; /* save starting available input and output */
- unsigned copy; /* number of stored or match bytes to copy */
- unsigned char FAR *from; /* where to copy match bytes from */
- code this; /* current decoding table entry */
- code last; /* parent table entry */
- unsigned len; /* length to copy for repeats, bits to drop */
- int ret; /* return code */
-#ifdef GUNZIP
- unsigned char hbuf[4]; /* buffer for gzip header crc calculation */
-#endif
- static const unsigned short order[19] = /* permutation of code lengths */
- {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-
- if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
- (strm->next_in == Z_NULL && strm->avail_in != 0))
- return Z_STREAM_ERROR;
-
- state = (struct inflate_state FAR *)strm->state;
- if (state->mode == TYPE) state->mode = TYPEDO; /* skip check */
- LOAD();
- in = have;
- out = left;
- ret = Z_OK;
- for (;;)
- switch (state->mode) {
- case HEAD:
- if (state->wrap == 0) {
- state->mode = TYPEDO;
- break;
- }
- NEEDBITS(16);
-#ifdef GUNZIP
- if ((state->wrap & 2) && hold == 0x8b1f) { /* gzip header */
- state->check = crc32(0L, Z_NULL, 0);
- CRC2(state->check, hold);
- INITBITS();
- state->mode = FLAGS;
- break;
- }
- state->flags = 0; /* expect zlib header */
- if (state->head != Z_NULL)
- state->head->done = -1;
- if (!(state->wrap & 1) || /* check if zlib header allowed */
-#else
- if (
-#endif
- ((BITS(8) << 8) + (hold >> 8)) % 31) {
- strm->msg = (char *)"incorrect header check";
- state->mode = BAD;
- break;
- }
- if (BITS(4) != Z_DEFLATED) {
- strm->msg = (char *)"unknown compression method";
- state->mode = BAD;
- break;
- }
- DROPBITS(4);
- len = BITS(4) + 8;
- if (len > state->wbits) {
- strm->msg = (char *)"invalid window size";
- state->mode = BAD;
- break;
- }
- state->dmax = 1U << len;
- Tracev((stderr, "inflate: zlib header ok\n"));
- strm->adler = state->check = adler32(0L, Z_NULL, 0);
- state->mode = hold & 0x200 ? DICTID : TYPE;
- INITBITS();
- break;
-#ifdef GUNZIP
- case FLAGS:
- NEEDBITS(16);
- state->flags = (int)(hold);
- if ((state->flags & 0xff) != Z_DEFLATED) {
- strm->msg = (char *)"unknown compression method";
- state->mode = BAD;
- break;
- }
- if (state->flags & 0xe000) {
- strm->msg = (char *)"unknown header flags set";
- state->mode = BAD;
- break;
- }
- if (state->head != Z_NULL)
- state->head->text = (int)((hold >> 8) & 1);
- if (state->flags & 0x0200) CRC2(state->check, hold);
- INITBITS();
- state->mode = TIME;
- case TIME:
- NEEDBITS(32);
- if (state->head != Z_NULL)
- state->head->time = hold;
- if (state->flags & 0x0200) CRC4(state->check, hold);
- INITBITS();
- state->mode = OS;
- case OS:
- NEEDBITS(16);
- if (state->head != Z_NULL) {
- state->head->xflags = (int)(hold & 0xff);
- state->head->os = (int)(hold >> 8);
- }
- if (state->flags & 0x0200) CRC2(state->check, hold);
- INITBITS();
- state->mode = EXLEN;
- case EXLEN:
- if (state->flags & 0x0400) {
- NEEDBITS(16);
- state->length = (unsigned)(hold);
- if (state->head != Z_NULL)
- state->head->extra_len = (unsigned)hold;
- if (state->flags & 0x0200) CRC2(state->check, hold);
- INITBITS();
- }
- else if (state->head != Z_NULL)
- state->head->extra = Z_NULL;
- state->mode = EXTRA;
- case EXTRA:
- if (state->flags & 0x0400) {
- copy = state->length;
- if (copy > have) copy = have;
- if (copy) {
- if (state->head != Z_NULL &&
- state->head->extra != Z_NULL) {
- len = state->head->extra_len - state->length;
- zmemcpy(state->head->extra + len, next,
- len + copy > state->head->extra_max ?
- state->head->extra_max - len : copy);
- }
- if (state->flags & 0x0200)
- state->check = crc32(state->check, next, copy);
- have -= copy;
- next += copy;
- state->length -= copy;
- }
- if (state->length) goto inf_leave;
- }
- state->length = 0;
- state->mode = NAME;
- case NAME:
- if (state->flags & 0x0800) {
- if (have == 0) goto inf_leave;
- copy = 0;
- do {
- len = (unsigned)(next[copy++]);
- if (state->head != Z_NULL &&
- state->head->name != Z_NULL &&
- state->length < state->head->name_max)
- state->head->name[state->length++] = len;
- } while (len && copy < have);
- if (state->flags & 0x0200)
- state->check = crc32(state->check, next, copy);
- have -= copy;
- next += copy;
- if (len) goto inf_leave;
- }
- else if (state->head != Z_NULL)
- state->head->name = Z_NULL;
- state->length = 0;
- state->mode = COMMENT;
- case COMMENT:
- if (state->flags & 0x1000) {
- if (have == 0) goto inf_leave;
- copy = 0;
- do {
- len = (unsigned)(next[copy++]);
- if (state->head != Z_NULL &&
- state->head->comment != Z_NULL &&
- state->length < state->head->comm_max)
- state->head->comment[state->length++] = len;
- } while (len && copy < have);
- if (state->flags & 0x0200)
- state->check = crc32(state->check, next, copy);
- have -= copy;
- next += copy;
- if (len) goto inf_leave;
- }
- else if (state->head != Z_NULL)
- state->head->comment = Z_NULL;
- state->mode = HCRC;
- case HCRC:
- if (state->flags & 0x0200) {
- NEEDBITS(16);
- if (hold != (state->check & 0xffff)) {
- strm->msg = (char *)"header crc mismatch";
- state->mode = BAD;
- break;
- }
- INITBITS();
- }
- if (state->head != Z_NULL) {
- state->head->hcrc = (int)((state->flags >> 9) & 1);
- state->head->done = 1;
- }
- strm->adler = state->check = crc32(0L, Z_NULL, 0);
- state->mode = TYPE;
- break;
-#endif
- case DICTID:
- NEEDBITS(32);
- strm->adler = state->check = REVERSE(hold);
- INITBITS();
- state->mode = DICT;
- case DICT:
- if (state->havedict == 0) {
- RESTORE();
- return Z_NEED_DICT;
- }
- strm->adler = state->check = adler32(0L, Z_NULL, 0);
- state->mode = TYPE;
- case TYPE:
- if (flush == Z_BLOCK) goto inf_leave;
- case TYPEDO:
- if (state->last) {
- BYTEBITS();
- state->mode = CHECK;
- break;
- }
- NEEDBITS(3);
- state->last = BITS(1);
- DROPBITS(1);
- switch (BITS(2)) {
- case 0: /* stored block */
- Tracev((stderr, "inflate: stored block%s\n",
- state->last ? " (last)" : ""));
- state->mode = STORED;
- break;
- case 1: /* fixed block */
- fixedtables(state);
- Tracev((stderr, "inflate: fixed codes block%s\n",
- state->last ? " (last)" : ""));
- state->mode = LEN; /* decode codes */
- break;
- case 2: /* dynamic block */
- Tracev((stderr, "inflate: dynamic codes block%s\n",
- state->last ? " (last)" : ""));
- state->mode = TABLE;
- break;
- case 3:
- strm->msg = (char *)"invalid block type";
- state->mode = BAD;
- }
- DROPBITS(2);
- break;
- case STORED:
- BYTEBITS(); /* go to byte boundary */
- NEEDBITS(32);
- if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
- strm->msg = (char *)"invalid stored block lengths";
- state->mode = BAD;
- break;
- }
- state->length = (unsigned)hold & 0xffff;
- Tracev((stderr, "inflate: stored length %u\n",
- state->length));
- INITBITS();
- state->mode = COPY;
- case COPY:
- copy = state->length;
- if (copy) {
- if (copy > have) copy = have;
- if (copy > left) copy = left;
- if (copy == 0) goto inf_leave;
- zmemcpy(put, next, copy);
- have -= copy;
- next += copy;
- left -= copy;
- put += copy;
- state->length -= copy;
- break;
- }
- Tracev((stderr, "inflate: stored end\n"));
- state->mode = TYPE;
- break;
- case TABLE:
- NEEDBITS(14);
- state->nlen = BITS(5) + 257;
- DROPBITS(5);
- state->ndist = BITS(5) + 1;
- DROPBITS(5);
- state->ncode = BITS(4) + 4;
- DROPBITS(4);
-#ifndef PKZIP_BUG_WORKAROUND
- if (state->nlen > 286 || state->ndist > 30) {
- strm->msg = (char *)"too many length or distance symbols";
- state->mode = BAD;
- break;
- }
-#endif
- Tracev((stderr, "inflate: table sizes ok\n"));
- state->have = 0;
- state->mode = LENLENS;
- case LENLENS:
- while (state->have < state->ncode) {
- NEEDBITS(3);
- state->lens[order[state->have++]] = (unsigned short)BITS(3);
- DROPBITS(3);
- }
- while (state->have < 19)
- state->lens[order[state->have++]] = 0;
- state->next = state->codes;
- state->lencode = (code const FAR *)(state->next);
- state->lenbits = 7;
- ret = inflate_table(CODES, state->lens, 19, &(state->next),
- &(state->lenbits), state->work);
- if (ret) {
- strm->msg = (char *)"invalid code lengths set";
- state->mode = BAD;
- break;
- }
- Tracev((stderr, "inflate: code lengths ok\n"));
- state->have = 0;
- state->mode = CODELENS;
- case CODELENS:
- while (state->have < state->nlen + state->ndist) {
- for (;;) {
- this = state->lencode[BITS(state->lenbits)];
- if ((unsigned)(this.bits) <= bits) break;
- PULLBYTE();
- }
- if (this.val < 16) {
- NEEDBITS(this.bits);
- DROPBITS(this.bits);
- state->lens[state->have++] = this.val;
- }
- else {
- if (this.val == 16) {
- NEEDBITS(this.bits + 2);
- DROPBITS(this.bits);
- if (state->have == 0) {
- strm->msg = (char *)"invalid bit length repeat";
- state->mode = BAD;
- break;
- }
- len = state->lens[state->have - 1];
- copy = 3 + BITS(2);
- DROPBITS(2);
- }
- else if (this.val == 17) {
- NEEDBITS(this.bits + 3);
- DROPBITS(this.bits);
- len = 0;
- copy = 3 + BITS(3);
- DROPBITS(3);
- }
- else {
- NEEDBITS(this.bits + 7);
- DROPBITS(this.bits);
- len = 0;
- copy = 11 + BITS(7);
- DROPBITS(7);
- }
- if (state->have + copy > state->nlen + state->ndist) {
- strm->msg = (char *)"invalid bit length repeat";
- state->mode = BAD;
- break;
- }
- while (copy--)
- state->lens[state->have++] = (unsigned short)len;
- }
- }
-
- /* handle error breaks in while */
- if (state->mode == BAD) break;
-
- /* build code tables */
- state->next = state->codes;
- state->lencode = (code const FAR *)(state->next);
- state->lenbits = 9;
- ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
- &(state->lenbits), state->work);
- if (ret) {
- strm->msg = (char *)"invalid literal/lengths set";
- state->mode = BAD;
- break;
- }
- state->distcode = (code const FAR *)(state->next);
- state->distbits = 6;
- ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
- &(state->next), &(state->distbits), state->work);
- if (ret) {
- strm->msg = (char *)"invalid distances set";
- state->mode = BAD;
- break;
- }
- Tracev((stderr, "inflate: codes ok\n"));
- state->mode = LEN;
- case LEN:
- if (have >= 6 && left >= 258) {
- RESTORE();
- inflate_fast(strm, out);
- LOAD();
- break;
- }
- for (;;) {
- this = state->lencode[BITS(state->lenbits)];
- if ((unsigned)(this.bits) <= bits) break;
- PULLBYTE();
- }
- if (this.op && (this.op & 0xf0) == 0) {
- last = this;
- for (;;) {
- this = state->lencode[last.val +
- (BITS(last.bits + last.op) >> last.bits)];
- if ((unsigned)(last.bits + this.bits) <= bits) break;
- PULLBYTE();
- }
- DROPBITS(last.bits);
- }
- DROPBITS(this.bits);
- state->length = (unsigned)this.val;
- if ((int)(this.op) == 0) {
- Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
- "inflate: literal '%c'\n" :
- "inflate: literal 0x%02x\n", this.val));
- state->mode = LIT;
- break;
- }
- if (this.op & 32) {
- Tracevv((stderr, "inflate: end of block\n"));
- state->mode = TYPE;
- break;
- }
- if (this.op & 64) {
- strm->msg = (char *)"invalid literal/length code";
- state->mode = BAD;
- break;
- }
- state->extra = (unsigned)(this.op) & 15;
- state->mode = LENEXT;
- case LENEXT:
- if (state->extra) {
- NEEDBITS(state->extra);
- state->length += BITS(state->extra);
- DROPBITS(state->extra);
- }
- Tracevv((stderr, "inflate: length %u\n", state->length));
- state->mode = DIST;
- case DIST:
- for (;;) {
- this = state->distcode[BITS(state->distbits)];
- if ((unsigned)(this.bits) <= bits) break;
- PULLBYTE();
- }
- if ((this.op & 0xf0) == 0) {
- last = this;
- for (;;) {
- this = state->distcode[last.val +
- (BITS(last.bits + last.op) >> last.bits)];
- if ((unsigned)(last.bits + this.bits) <= bits) break;
- PULLBYTE();
- }
- DROPBITS(last.bits);
- }
- DROPBITS(this.bits);
- if (this.op & 64) {
- strm->msg = (char *)"invalid distance code";
- state->mode = BAD;
- break;
- }
- state->offset = (unsigned)this.val;
- state->extra = (unsigned)(this.op) & 15;
- state->mode = DISTEXT;
- case DISTEXT:
- if (state->extra) {
- NEEDBITS(state->extra);
- state->offset += BITS(state->extra);
- DROPBITS(state->extra);
- }
-#ifdef INFLATE_STRICT
- if (state->offset > state->dmax) {
- strm->msg = (char *)"invalid distance too far back";
- state->mode = BAD;
- break;
- }
-#endif
- if (state->offset > state->whave + out - left) {
- strm->msg = (char *)"invalid distance too far back";
- state->mode = BAD;
- break;
- }
- Tracevv((stderr, "inflate: distance %u\n", state->offset));
- state->mode = MATCH;
- case MATCH:
- if (left == 0) goto inf_leave;
- copy = out - left;
- if (state->offset > copy) { /* copy from window */
- copy = state->offset - copy;
- if (copy > state->write) {
- copy -= state->write;
- from = state->window + (state->wsize - copy);
- }
- else
- from = state->window + (state->write - copy);
- if (copy > state->length) copy = state->length;
- }
- else { /* copy from output */
- from = put - state->offset;
- copy = state->length;
- }
- if (copy > left) copy = left;
- left -= copy;
- state->length -= copy;
- do {
- *put++ = *from++;
- } while (--copy);
- if (state->length == 0) state->mode = LEN;
- break;
- case LIT:
- if (left == 0) goto inf_leave;
- *put++ = (unsigned char)(state->length);
- left--;
- state->mode = LEN;
- break;
- case CHECK:
- if (state->wrap) {
- NEEDBITS(32);
- out -= left;
- strm->total_out += out;
- state->total += out;
- if (out)
- strm->adler = state->check =
- UPDATE(state->check, put - out, out);
- out = left;
- if ((
-#ifdef GUNZIP
- state->flags ? hold :
-#endif
- REVERSE(hold)) != state->check) {
- strm->msg = (char *)"incorrect data check";
- state->mode = BAD;
- break;
- }
- INITBITS();
- Tracev((stderr, "inflate: check matches trailer\n"));
- }
-#ifdef GUNZIP
- state->mode = LENGTH;
- case LENGTH:
- if (state->wrap && state->flags) {
- NEEDBITS(32);
- if (hold != (state->total & 0xffffffffUL)) {
- strm->msg = (char *)"incorrect length check";
- state->mode = BAD;
- break;
- }
- INITBITS();
- Tracev((stderr, "inflate: length matches trailer\n"));
- }
-#endif
- state->mode = DONE;
- case DONE:
- ret = Z_STREAM_END;
- goto inf_leave;
- case BAD:
- ret = Z_DATA_ERROR;
- goto inf_leave;
- case MEM:
- return Z_MEM_ERROR;
- case SYNC:
- default:
- return Z_STREAM_ERROR;
- }
-
- /*
- Return from inflate(), updating the total counts and the check value.
- If there was no progress during the inflate() call, return a buffer
- error. Call updatewindow() to create and/or update the window state.
- Note: a memory error from inflate() is non-recoverable.
- */
- inf_leave:
- RESTORE();
- if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
- if (updatewindow(strm, out)) {
- state->mode = MEM;
- return Z_MEM_ERROR;
- }
- in -= strm->avail_in;
- out -= strm->avail_out;
- strm->total_in += in;
- strm->total_out += out;
- state->total += out;
- if (state->wrap && out)
- strm->adler = state->check =
- UPDATE(state->check, strm->next_out - out, out);
- strm->data_type = state->bits + (state->last ? 64 : 0) +
- (state->mode == TYPE ? 128 : 0);
- if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
- ret = Z_BUF_ERROR;
- return ret;
-}
-
-int ZEXPORT inflateEnd(strm)
-z_streamp strm;
-{
- struct inflate_state FAR *state;
- if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
- return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)strm->state;
- if (state->window != Z_NULL) ZFREE(strm, state->window);
- ZFREE(strm, strm->state);
- strm->state = Z_NULL;
- Tracev((stderr, "inflate: end\n"));
- return Z_OK;
-}
-
-int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength)
-z_streamp strm;
-const Bytef *dictionary;
-uInt dictLength;
-{
- struct inflate_state FAR *state;
- unsigned long id;
-
- /* check state */
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)strm->state;
- if (state->wrap != 0 && state->mode != DICT)
- return Z_STREAM_ERROR;
-
- /* check for correct dictionary id */
- if (state->mode == DICT) {
- id = adler32(0L, Z_NULL, 0);
- id = adler32(id, dictionary, dictLength);
- if (id != state->check)
- return Z_DATA_ERROR;
- }
-
- /* copy dictionary to window */
- if (updatewindow(strm, strm->avail_out)) {
- state->mode = MEM;
- return Z_MEM_ERROR;
- }
- if (dictLength > state->wsize) {
- zmemcpy(state->window, dictionary + dictLength - state->wsize,
- state->wsize);
- state->whave = state->wsize;
- }
- else {
- zmemcpy(state->window + state->wsize - dictLength, dictionary,
- dictLength);
- state->whave = dictLength;
- }
- state->havedict = 1;
- Tracev((stderr, "inflate: dictionary set\n"));
- return Z_OK;
-}
-
-int ZEXPORT inflateGetHeader(strm, head)
-z_streamp strm;
-gz_headerp head;
-{
- struct inflate_state FAR *state;
-
- /* check state */
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)strm->state;
- if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
-
- /* save header structure */
- state->head = head;
- head->done = 0;
- return Z_OK;
-}
-
-/*
- Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff. Return when found
- or when out of input. When called, *have is the number of pattern bytes
- found in order so far, in 0..3. On return *have is updated to the new
- state. If on return *have equals four, then the pattern was found and the
- return value is how many bytes were read including the last byte of the
- pattern. If *have is less than four, then the pattern has not been found
- yet and the return value is len. In the latter case, syncsearch() can be
- called again with more data and the *have state. *have is initialized to
- zero for the first call.
- */
-local unsigned syncsearch(have, buf, len)
-unsigned FAR *have;
-unsigned char FAR *buf;
-unsigned len;
-{
- unsigned got;
- unsigned next;
-
- got = *have;
- next = 0;
- while (next < len && got < 4) {
- if ((int)(buf[next]) == (got < 2 ? 0 : 0xff))
- got++;
- else if (buf[next])
- got = 0;
- else
- got = 4 - got;
- next++;
- }
- *have = got;
- return next;
-}
-
-int ZEXPORT inflateSync(strm)
-z_streamp strm;
-{
- unsigned len; /* number of bytes to look at or looked at */
- unsigned long in, out; /* temporary to save total_in and total_out */
- unsigned char buf[4]; /* to restore bit buffer to byte string */
- struct inflate_state FAR *state;
-
- /* check parameters */
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)strm->state;
- if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
-
- /* if first time, start search in bit buffer */
- if (state->mode != SYNC) {
- state->mode = SYNC;
- state->hold <<= state->bits & 7;
- state->bits -= state->bits & 7;
- len = 0;
- while (state->bits >= 8) {
- buf[len++] = (unsigned char)(state->hold);
- state->hold >>= 8;
- state->bits -= 8;
- }
- state->have = 0;
- syncsearch(&(state->have), buf, len);
- }
-
- /* search available input */
- len = syncsearch(&(state->have), strm->next_in, strm->avail_in);
- strm->avail_in -= len;
- strm->next_in += len;
- strm->total_in += len;
-
- /* return no joy or set up to restart inflate() on a new block */
- if (state->have != 4) return Z_DATA_ERROR;
- in = strm->total_in; out = strm->total_out;
- inflateReset(strm);
- strm->total_in = in; strm->total_out = out;
- state->mode = TYPE;
- return Z_OK;
-}
-
-/*
- Returns true if inflate is currently at the end of a block generated by
- Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
- implementation to provide an additional safety check. PPP uses
- Z_SYNC_FLUSH but removes the length bytes of the resulting empty stored
- block. When decompressing, PPP checks that at the end of input packet,
- inflate is waiting for these length bytes.
- */
-int ZEXPORT inflateSyncPoint(strm)
-z_streamp strm;
-{
- struct inflate_state FAR *state;
-
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)strm->state;
- return state->mode == STORED && state->bits == 0;
-}
-
-int ZEXPORT inflateCopy(dest, source)
-z_streamp dest;
-z_streamp source;
-{
- struct inflate_state FAR *state;
- struct inflate_state FAR *copy;
- unsigned char FAR *window;
- unsigned wsize;
-
- /* check input */
- if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
- source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
- return Z_STREAM_ERROR;
- state = (struct inflate_state FAR *)source->state;
-
- /* allocate space */
- copy = (struct inflate_state FAR *)
- ZALLOC(source, 1, sizeof(struct inflate_state));
- if (copy == Z_NULL) return Z_MEM_ERROR;
- window = Z_NULL;
- if (state->window != Z_NULL) {
- window = (unsigned char FAR *)
- ZALLOC(source, 1U << state->wbits, sizeof(unsigned char));
- if (window == Z_NULL) {
- ZFREE(source, copy);
- return Z_MEM_ERROR;
- }
- }
-
- /* copy state */
- zmemcpy(dest, source, sizeof(z_stream));
- zmemcpy(copy, state, sizeof(struct inflate_state));
- if (state->lencode >= state->codes &&
- state->lencode <= state->codes + ENOUGH - 1) {
- copy->lencode = copy->codes + (state->lencode - state->codes);
- copy->distcode = copy->codes + (state->distcode - state->codes);
- }
- copy->next = copy->codes + (state->next - state->codes);
- if (window != Z_NULL) {
- wsize = 1U << state->wbits;
- zmemcpy(window, state->window, wsize);
- }
- copy->window = window;
- dest->state = (struct internal_state FAR *)copy;
- return Z_OK;
-}
+++ /dev/null
-/* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2004 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-/* define NO_GZIP when compiling if you want to disable gzip header and
- trailer decoding by inflate(). NO_GZIP would be used to avoid linking in
- the crc code when it is not needed. For shared libraries, gzip decoding
- should be left enabled. */
-#ifndef NO_GZIP
-# define GUNZIP
-#endif
-
-/* Possible inflate modes between inflate() calls */
-typedef enum {
- HEAD, /* i: waiting for magic header */
- FLAGS, /* i: waiting for method and flags (gzip) */
- TIME, /* i: waiting for modification time (gzip) */
- OS, /* i: waiting for extra flags and operating system (gzip) */
- EXLEN, /* i: waiting for extra length (gzip) */
- EXTRA, /* i: waiting for extra bytes (gzip) */
- NAME, /* i: waiting for end of file name (gzip) */
- COMMENT, /* i: waiting for end of comment (gzip) */
- HCRC, /* i: waiting for header crc (gzip) */
- DICTID, /* i: waiting for dictionary check value */
- DICT, /* waiting for inflateSetDictionary() call */
- TYPE, /* i: waiting for type bits, including last-flag bit */
- TYPEDO, /* i: same, but skip check to exit inflate on new block */
- STORED, /* i: waiting for stored size (length and complement) */
- COPY, /* i/o: waiting for input or output to copy stored block */
- TABLE, /* i: waiting for dynamic block table lengths */
- LENLENS, /* i: waiting for code length code lengths */
- CODELENS, /* i: waiting for length/lit and distance code lengths */
- LEN, /* i: waiting for length/lit code */
- LENEXT, /* i: waiting for length extra bits */
- DIST, /* i: waiting for distance code */
- DISTEXT, /* i: waiting for distance extra bits */
- MATCH, /* o: waiting for output space to copy string */
- LIT, /* o: waiting for output space to write literal */
- CHECK, /* i: waiting for 32-bit check value */
- LENGTH, /* i: waiting for 32-bit length (gzip) */
- DONE, /* finished check, done -- remain here until reset */
- BAD, /* got a data error -- remain here until reset */
- MEM, /* got an inflate() memory error -- remain here until reset */
- SYNC /* looking for synchronization bytes to restart inflate() */
-} inflate_mode;
-
-/*
- State transitions between above modes -
-
- (most modes can go to the BAD or MEM mode -- not shown for clarity)
-
- Process header:
- HEAD -> (gzip) or (zlib)
- (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
- NAME -> COMMENT -> HCRC -> TYPE
- (zlib) -> DICTID or TYPE
- DICTID -> DICT -> TYPE
- Read deflate blocks:
- TYPE -> STORED or TABLE or LEN or CHECK
- STORED -> COPY -> TYPE
- TABLE -> LENLENS -> CODELENS -> LEN
- Read deflate codes:
- LEN -> LENEXT or LIT or TYPE
- LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
- LIT -> LEN
- Process trailer:
- CHECK -> LENGTH -> DONE
- */
-
-/* state maintained between inflate() calls. Approximately 7K bytes. */
-struct inflate_state {
- inflate_mode mode; /* current inflate mode */
- int last; /* true if processing last block */
- int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
- int havedict; /* true if dictionary provided */
- int flags; /* gzip header method and flags (0 if zlib) */
- unsigned dmax; /* zlib header max distance (INFLATE_STRICT) */
- unsigned long check; /* protected copy of check value */
- unsigned long total; /* protected copy of output count */
- gz_headerp head; /* where to save gzip header information */
- /* sliding window */
- unsigned wbits; /* log base 2 of requested window size */
- unsigned wsize; /* window size or zero if not using window */
- unsigned whave; /* valid bytes in the window */
- unsigned write; /* window write index */
- unsigned char FAR *window; /* allocated sliding window, if needed */
- /* bit accumulator */
- unsigned long hold; /* input bit accumulator */
- unsigned bits; /* number of bits in "in" */
- /* for string and stored block copying */
- unsigned length; /* literal or length of data to copy */
- unsigned offset; /* distance back to copy string from */
- /* for table and code decoding */
- unsigned extra; /* extra bits needed */
- /* fixed and dynamic code tables */
- code const FAR *lencode; /* starting table for length/literal codes */
- code const FAR *distcode; /* starting table for distance codes */
- unsigned lenbits; /* index bits for lencode */
- unsigned distbits; /* index bits for distcode */
- /* dynamic table building */
- unsigned ncode; /* number of code length code lengths */
- unsigned nlen; /* number of length code lengths */
- unsigned ndist; /* number of distance code lengths */
- unsigned have; /* number of code lengths in lens[] */
- code FAR *next; /* next available space in codes[] */
- unsigned short lens[320]; /* temporary storage for code lengths */
- unsigned short work[288]; /* work area for code table building */
- code codes[ENOUGH]; /* space for code tables */
-};
+++ /dev/null
-/* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2005 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-
-#define MAXBITS 15
-
-const char inflate_copyright[] =
- " inflate 1.2.3 Copyright 1995-2005 Mark Adler ";
-/*
- If you use the zlib library in a product, an acknowledgment is welcome
- in the documentation of your product. If for some reason you cannot
- include such an acknowledgment, I would appreciate that you keep this
- copyright string in the executable of your product.
- */
-
-/*
- Build a set of tables to decode the provided canonical Huffman code.
- The code lengths are lens[0..codes-1]. The result starts at *table,
- whose indices are 0..2^bits-1. work is a writable array of at least
- lens shorts, which is used as a work area. type is the type of code
- to be generated, CODES, LENS, or DISTS. On return, zero is success,
- -1 is an invalid code, and +1 means that ENOUGH isn't enough. table
- on return points to the next available entry's address. bits is the
- requested root table index bits, and on return it is the actual root
- table index bits. It will differ if the request is greater than the
- longest code or if it is less than the shortest code.
- */
-int inflate_table(type, lens, codes, table, bits, work)
-codetype type;
-unsigned short FAR *lens;
-unsigned codes;
-code FAR * FAR *table;
-unsigned FAR *bits;
-unsigned short FAR *work;
-{
- unsigned len; /* a code's length in bits */
- unsigned sym; /* index of code symbols */
- unsigned min, max; /* minimum and maximum code lengths */
- unsigned root; /* number of index bits for root table */
- unsigned curr; /* number of index bits for current table */
- unsigned drop; /* code bits to drop for sub-table */
- int left; /* number of prefix codes available */
- unsigned used; /* code entries in table used */
- unsigned huff; /* Huffman code */
- unsigned incr; /* for incrementing code, index */
- unsigned fill; /* index for replicating entries */
- unsigned low; /* low bits for current root entry */
- unsigned mask; /* mask for low root bits */
- code this; /* table entry for duplication */
- code FAR *next; /* next available space in table */
- const unsigned short FAR *base; /* base value table to use */
- const unsigned short FAR *extra; /* extra bits table to use */
- int end; /* use base and extra for symbol > end */
- unsigned short count[MAXBITS+1]; /* number of codes of each length */
- unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
- static const unsigned short lbase[31] = { /* Length codes 257..285 base */
- 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
- 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
- static const unsigned short lext[31] = { /* Length codes 257..285 extra */
- 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
- 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 201, 196};
- static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
- 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
- 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
- 8193, 12289, 16385, 24577, 0, 0};
- static const unsigned short dext[32] = { /* Distance codes 0..29 extra */
- 16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
- 23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
- 28, 28, 29, 29, 64, 64};
-
- /*
- Process a set of code lengths to create a canonical Huffman code. The
- code lengths are lens[0..codes-1]. Each length corresponds to the
- symbols 0..codes-1. The Huffman code is generated by first sorting the
- symbols by length from short to long, and retaining the symbol order
- for codes with equal lengths. Then the code starts with all zero bits
- for the first code of the shortest length, and the codes are integer
- increments for the same length, and zeros are appended as the length
- increases. For the deflate format, these bits are stored backwards
- from their more natural integer increment ordering, and so when the
- decoding tables are built in the large loop below, the integer codes
- are incremented backwards.
-
- This routine assumes, but does not check, that all of the entries in
- lens[] are in the range 0..MAXBITS. The caller must assure this.
- 1..MAXBITS is interpreted as that code length. zero means that that
- symbol does not occur in this code.
-
- The codes are sorted by computing a count of codes for each length,
- creating from that a table of starting indices for each length in the
- sorted table, and then entering the symbols in order in the sorted
- table. The sorted table is work[], with that space being provided by
- the caller.
-
- The length counts are used for other purposes as well, i.e. finding
- the minimum and maximum length codes, determining if there are any
- codes at all, checking for a valid set of lengths, and looking ahead
- at length counts to determine sub-table sizes when building the
- decoding tables.
- */
-
- /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
- for (len = 0; len <= MAXBITS; len++)
- count[len] = 0;
- for (sym = 0; sym < codes; sym++)
- count[lens[sym]]++;
-
- /* bound code lengths, force root to be within code lengths */
- root = *bits;
- for (max = MAXBITS; max >= 1; max--)
- if (count[max] != 0) break;
- if (root > max) root = max;
- if (max == 0) { /* no symbols to code at all */
- this.op = (unsigned char)64; /* invalid code marker */
- this.bits = (unsigned char)1;
- this.val = (unsigned short)0;
- *(*table)++ = this; /* make a table to force an error */
- *(*table)++ = this;
- *bits = 1;
- return 0; /* no symbols, but wait for decoding to report error */
- }
- for (min = 1; min <= MAXBITS; min++)
- if (count[min] != 0) break;
- if (root < min) root = min;
-
- /* check for an over-subscribed or incomplete set of lengths */
- left = 1;
- for (len = 1; len <= MAXBITS; len++) {
- left <<= 1;
- left -= count[len];
- if (left < 0) return -1; /* over-subscribed */
- }
- if (left > 0 && (type == CODES || max != 1))
- return -1; /* incomplete set */
-
- /* generate offsets into symbol table for each length for sorting */
- offs[1] = 0;
- for (len = 1; len < MAXBITS; len++)
- offs[len + 1] = offs[len] + count[len];
-
- /* sort symbols by length, by symbol order within each length */
- for (sym = 0; sym < codes; sym++)
- if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
-
- /*
- Create and fill in decoding tables. In this loop, the table being
- filled is at next and has curr index bits. The code being used is huff
- with length len. That code is converted to an index by dropping drop
- bits off of the bottom. For codes where len is less than drop + curr,
- those top drop + curr - len bits are incremented through all values to
- fill the table with replicated entries.
-
- root is the number of index bits for the root table. When len exceeds
- root, sub-tables are created pointed to by the root entry with an index
- of the low root bits of huff. This is saved in low to check for when a
- new sub-table should be started. drop is zero when the root table is
- being filled, and drop is root when sub-tables are being filled.
-
- When a new sub-table is needed, it is necessary to look ahead in the
- code lengths to determine what size sub-table is needed. The length
- counts are used for this, and so count[] is decremented as codes are
- entered in the tables.
-
- used keeps track of how many table entries have been allocated from the
- provided *table space. It is checked when a LENS table is being made
- against the space in *table, ENOUGH, minus the maximum space needed by
- the worst case distance code, MAXD. This should never happen, but the
- sufficiency of ENOUGH has not been proven exhaustively, hence the check.
- This assumes that when type == LENS, bits == 9.
-
- sym increments through all symbols, and the loop terminates when
- all codes of length max, i.e. all codes, have been processed. This
- routine permits incomplete codes, so another loop after this one fills
- in the rest of the decoding tables with invalid code markers.
- */
-
- /* set up for code type */
- switch (type) {
- case CODES:
- base = extra = work; /* dummy value--not used */
- end = 19;
- break;
- case LENS:
- base = lbase;
- base -= 257;
- extra = lext;
- extra -= 257;
- end = 256;
- break;
- default: /* DISTS */
- base = dbase;
- extra = dext;
- end = -1;
- }
-
- /* initialize state for loop */
- huff = 0; /* starting code */
- sym = 0; /* starting code symbol */
- len = min; /* starting code length */
- next = *table; /* current table to fill in */
- curr = root; /* current table index bits */
- drop = 0; /* current bits to drop from code for index */
- low = (unsigned)(-1); /* trigger new sub-table when len > root */
- used = 1U << root; /* use root table entries */
- mask = used - 1; /* mask for comparing low */
-
- /* check available table space */
- if (type == LENS && used >= ENOUGH - MAXD)
- return 1;
-
- /* process all codes and make table entries */
- for (;;) {
- /* create table entry */
- this.bits = (unsigned char)(len - drop);
- if ((int)(work[sym]) < end) {
- this.op = (unsigned char)0;
- this.val = work[sym];
- }
- else if ((int)(work[sym]) > end) {
- this.op = (unsigned char)(extra[work[sym]]);
- this.val = base[work[sym]];
- }
- else {
- this.op = (unsigned char)(32 + 64); /* end of block */
- this.val = 0;
- }
-
- /* replicate for those indices with low len bits equal to huff */
- incr = 1U << (len - drop);
- fill = 1U << curr;
- min = fill; /* save offset to next table */
- do {
- fill -= incr;
- next[(huff >> drop) + fill] = this;
- } while (fill != 0);
-
- /* backwards increment the len-bit code huff */
- incr = 1U << (len - 1);
- while (huff & incr)
- incr >>= 1;
- if (incr != 0) {
- huff &= incr - 1;
- huff += incr;
- }
- else
- huff = 0;
-
- /* go to next symbol, update count, len */
- sym++;
- if (--(count[len]) == 0) {
- if (len == max) break;
- len = lens[work[sym]];
- }
-
- /* create new sub-table if needed */
- if (len > root && (huff & mask) != low) {
- /* if first time, transition to sub-tables */
- if (drop == 0)
- drop = root;
-
- /* increment past last table */
- next += min; /* here min is 1 << curr */
-
- /* determine length of next table */
- curr = len - drop;
- left = (int)(1 << curr);
- while (curr + drop < max) {
- left -= count[curr + drop];
- if (left <= 0) break;
- curr++;
- left <<= 1;
- }
-
- /* check for enough space */
- used += 1U << curr;
- if (type == LENS && used >= ENOUGH - MAXD)
- return 1;
-
- /* point entry in root table to sub-table */
- low = huff & mask;
- (*table)[low].op = (unsigned char)curr;
- (*table)[low].bits = (unsigned char)root;
- (*table)[low].val = (unsigned short)(next - *table);
- }
- }
-
- /*
- Fill in rest of table for incomplete codes. This loop is similar to the
- loop above in incrementing huff for table indices. It is assumed that
- len is equal to curr + drop, so there is no loop needed to increment
- through high index bits. When the current sub-table is filled, the loop
- drops back to the root table to fill in any remaining entries there.
- */
- this.op = (unsigned char)64; /* invalid code marker */
- this.bits = (unsigned char)(len - drop);
- this.val = (unsigned short)0;
- while (huff != 0) {
- /* when done with sub-table, drop back to root table */
- if (drop != 0 && (huff & mask) != low) {
- drop = 0;
- len = root;
- next = *table;
- this.bits = (unsigned char)len;
- }
-
- /* put invalid code marker in table */
- next[huff >> drop] = this;
-
- /* backwards increment the len-bit code huff */
- incr = 1U << (len - 1);
- while (huff & incr)
- incr >>= 1;
- if (incr != 0) {
- huff &= incr - 1;
- huff += incr;
- }
- else
- huff = 0;
- }
-
- /* set return parameters */
- *table += used;
- *bits = root;
- return 0;
-}
+++ /dev/null
-/* inftrees.h -- header to use inftrees.c
- * Copyright (C) 1995-2005 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-/* Structure for decoding tables. Each entry provides either the
- information needed to do the operation requested by the code that
- indexed that table entry, or it provides a pointer to another
- table that indexes more bits of the code. op indicates whether
- the entry is a pointer to another table, a literal, a length or
- distance, an end-of-block, or an invalid code. For a table
- pointer, the low four bits of op is the number of index bits of
- that table. For a length or distance, the low four bits of op
- is the number of extra bits to get after the code. bits is
- the number of bits in this code or part of the code to drop off
- of the bit buffer. val is the actual byte to output in the case
- of a literal, the base length or distance, or the offset from
- the current table to the next table. Each entry is four bytes. */
-typedef struct {
- unsigned char op; /* operation, extra bits, table bits */
- unsigned char bits; /* bits in this part of the code */
- unsigned short val; /* offset in table or code value */
-} code;
-
-/* op values as set by inflate_table():
- 00000000 - literal
- 0000tttt - table link, tttt != 0 is the number of table index bits
- 0001eeee - length or distance, eeee is the number of extra bits
- 01100000 - end of block
- 01000000 - invalid code
- */
-
-/* Maximum size of dynamic tree. The maximum found in a long but non-
- exhaustive search was 1444 code structures (852 for length/literals
- and 592 for distances, the latter actually the result of an
- exhaustive search). The true maximum is not known, but the value
- below is more than safe. */
-#define ENOUGH 2048
-#define MAXD 592
-
-/* Type of code to build for inftable() */
-typedef enum {
- CODES,
- LENS,
- DISTS
-} codetype;
-
-extern int inflate_table OF((codetype type, unsigned short FAR *lens,
- unsigned codes, code FAR * FAR *table,
- unsigned FAR *bits, unsigned short FAR *work));
+++ /dev/null
-/* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2005 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- * minigzip is a minimal implementation of the gzip utility. This is
- * only an example of using zlib and isn't meant to replace the
- * full-featured gzip. No attempt is made to deal with file systems
- * limiting names to 14 or 8+3 characters, etc... Error checking is
- * very limited. So use minigzip only for testing; use gzip for the
- * real thing. On MSDOS, use only on file names without extension
- * or in pipe mode.
- */
-
-/* @(#) $Id$ */
-
-#include <stdio.h>
-#include "zlib.h"
-
-#ifdef STDC
-# include <string.h>
-# include <stdlib.h>
-#endif
-
-#ifdef USE_MMAP
-# include <sys/types.h>
-# include <sys/mman.h>
-# include <sys/stat.h>
-#endif
-
-#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
-# include <fcntl.h>
-# include <io.h>
-# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
-#else
-# define SET_BINARY_MODE(file)
-#endif
-
-#ifdef VMS
-# define unlink delete
-# define GZ_SUFFIX "-gz"
-#endif
-#ifdef RISCOS
-# define unlink remove
-# define GZ_SUFFIX "-gz"
-# define fileno(file) file->__file
-#endif
-#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
-# include <unix.h> /* for fileno */
-#endif
-
-#ifndef WIN32 /* unlink already in stdio.h for WIN32 */
- extern int unlink OF((const char *));
-#endif
-
-#ifndef GZ_SUFFIX
-# define GZ_SUFFIX ".gz"
-#endif
-#define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
-
-#define BUFLEN 16384
-#define MAX_NAME_LEN 1024
-
-#ifdef MAXSEG_64K
-# define local static
- /* Needed for systems with limitation on stack size. */
-#else
-# define local
-#endif
-
-char *prog;
-
-void error OF((const char *msg));
-void gz_compress OF((FILE *in, gzFile out));
-#ifdef USE_MMAP
-int gz_compress_mmap OF((FILE *in, gzFile out));
-#endif
-void gz_uncompress OF((gzFile in, FILE *out));
-void file_compress OF((char *file, char *mode));
-void file_uncompress OF((char *file));
-int main OF((int argc, char *argv[]));
-
-/* ===========================================================================
- * Display error message and exit
- */
-void error(msg)
- const char *msg;
-{
- fprintf(stderr, "%s: %s\n", prog, msg);
- exit(1);
-}
-
-/* ===========================================================================
- * Compress input to output then close both files.
- */
-
-void gz_compress(in, out)
- FILE *in;
- gzFile out;
-{
- local char buf[BUFLEN];
- int len;
- int err;
-
-#ifdef USE_MMAP
- /* Try first compressing with mmap. If mmap fails (minigzip used in a
- * pipe), use the normal fread loop.
- */
- if (gz_compress_mmap(in, out) == Z_OK) return;
-#endif
- for (;;) {
- len = (int)fread(buf, 1, sizeof(buf), in);
- if (ferror(in)) {
- perror("fread");
- exit(1);
- }
- if (len == 0) break;
-
- if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
- }
- fclose(in);
- if (gzclose(out) != Z_OK) error("failed gzclose");
-}
-
-#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
-
-/* Try compressing the input file at once using mmap. Return Z_OK if
- * if success, Z_ERRNO otherwise.
- */
-int gz_compress_mmap(in, out)
- FILE *in;
- gzFile out;
-{
- int len;
- int err;
- int ifd = fileno(in);
- caddr_t buf; /* mmap'ed buffer for the entire input file */
- off_t buf_len; /* length of the input file */
- struct stat sb;
-
- /* Determine the size of the file, needed for mmap: */
- if (fstat(ifd, &sb) < 0) return Z_ERRNO;
- buf_len = sb.st_size;
- if (buf_len <= 0) return Z_ERRNO;
-
- /* Now do the actual mmap: */
- buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
- if (buf == (caddr_t)(-1)) return Z_ERRNO;
-
- /* Compress the whole file at once: */
- len = gzwrite(out, (char *)buf, (unsigned)buf_len);
-
- if (len != (int)buf_len) error(gzerror(out, &err));
-
- munmap(buf, buf_len);
- fclose(in);
- if (gzclose(out) != Z_OK) error("failed gzclose");
- return Z_OK;
-}
-#endif /* USE_MMAP */
-
-/* ===========================================================================
- * Uncompress input to output then close both files.
- */
-void gz_uncompress(in, out)
- gzFile in;
- FILE *out;
-{
- local char buf[BUFLEN];
- int len;
- int err;
-
- for (;;) {
- len = gzread(in, buf, sizeof(buf));
- if (len < 0) error (gzerror(in, &err));
- if (len == 0) break;
-
- if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {
- error("failed fwrite");
- }
- }
- if (fclose(out)) error("failed fclose");
-
- if (gzclose(in) != Z_OK) error("failed gzclose");
-}
-
-
-/* ===========================================================================
- * Compress the given file: create a corresponding .gz file and remove the
- * original.
- */
-void file_compress(file, mode)
- char *file;
- char *mode;
-{
- local char outfile[MAX_NAME_LEN];
- FILE *in;
- gzFile out;
-
- strcpy(outfile, file);
- strcat(outfile, GZ_SUFFIX);
-
- in = fopen(file, "rb");
- if (in == NULL) {
- perror(file);
- exit(1);
- }
- out = gzopen(outfile, mode);
- if (out == NULL) {
- fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
- exit(1);
- }
- gz_compress(in, out);
-
- unlink(file);
-}
-
-
-/* ===========================================================================
- * Uncompress the given file and remove the original.
- */
-void file_uncompress(file)
- char *file;
-{
- local char buf[MAX_NAME_LEN];
- char *infile, *outfile;
- FILE *out;
- gzFile in;
- uInt len = (uInt)strlen(file);
-
- strcpy(buf, file);
-
- if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {
- infile = file;
- outfile = buf;
- outfile[len-3] = '\0';
- } else {
- outfile = file;
- infile = buf;
- strcat(infile, GZ_SUFFIX);
- }
- in = gzopen(infile, "rb");
- if (in == NULL) {
- fprintf(stderr, "%s: can't gzopen %s\n", prog, infile);
- exit(1);
- }
- out = fopen(outfile, "wb");
- if (out == NULL) {
- perror(file);
- exit(1);
- }
-
- gz_uncompress(in, out);
-
- unlink(infile);
-}
-
-
-/* ===========================================================================
- * Usage: minigzip [-d] [-f] [-h] [-r] [-1 to -9] [files...]
- * -d : decompress
- * -f : compress with Z_FILTERED
- * -h : compress with Z_HUFFMAN_ONLY
- * -r : compress with Z_RLE
- * -1 to -9 : compression level
- */
-
-int main(argc, argv)
- int argc;
- char *argv[];
-{
- int uncompr = 0;
- gzFile file;
- char outmode[20];
-
- strcpy(outmode, "wb6 ");
-
- prog = argv[0];
- argc--, argv++;
-
- while (argc > 0) {
- if (strcmp(*argv, "-d") == 0)
- uncompr = 1;
- else if (strcmp(*argv, "-f") == 0)
- outmode[3] = 'f';
- else if (strcmp(*argv, "-h") == 0)
- outmode[3] = 'h';
- else if (strcmp(*argv, "-r") == 0)
- outmode[3] = 'R';
- else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' &&
- (*argv)[2] == 0)
- outmode[2] = (*argv)[1];
- else
- break;
- argc--, argv++;
- }
- if (outmode[3] == ' ')
- outmode[3] = 0;
- if (argc == 0) {
- SET_BINARY_MODE(stdin);
- SET_BINARY_MODE(stdout);
- if (uncompr) {
- file = gzdopen(fileno(stdin), "rb");
- if (file == NULL) error("can't gzdopen stdin");
- gz_uncompress(file, stdout);
- } else {
- file = gzdopen(fileno(stdout), outmode);
- if (file == NULL) error("can't gzdopen stdout");
- gz_compress(stdin, file);
- }
- } else {
- do {
- if (uncompr) {
- file_uncompress(*argv);
- } else {
- file_compress(*argv, outmode);
- }
- } while (argv++, --argc);
- }
- return 0;
-}
+++ /dev/null
-/* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2005 Jean-loup Gailly
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- * ALGORITHM
- *
- * The "deflation" process uses several Huffman trees. The more
- * common source values are represented by shorter bit sequences.
- *
- * Each code tree is stored in a compressed form which is itself
- * a Huffman encoding of the lengths of all the code strings (in
- * ascending order by source values). The actual code strings are
- * reconstructed from the lengths in the inflate process, as described
- * in the deflate specification.
- *
- * REFERENCES
- *
- * Deutsch, L.P.,"'Deflate' Compressed Data Format Specification".
- * Available in ftp.uu.net:/pub/archiving/zip/doc/deflate-1.1.doc
- *
- * Storer, James A.
- * Data Compression: Methods and Theory, pp. 49-50.
- * Computer Science Press, 1988. ISBN 0-7167-8156-5.
- *
- * Sedgewick, R.
- * Algorithms, p290.
- * Addison-Wesley, 1983. ISBN 0-201-06672-6.
- */
-
-/* @(#) $Id$ */
-
-/* #define GEN_TREES_H */
-
-#include "deflate.h"
-
-#ifdef DEBUG
-# include <ctype.h>
-#endif
-
-/* ===========================================================================
- * Constants
- */
-
-#define MAX_BL_BITS 7
-/* Bit length codes must not exceed MAX_BL_BITS bits */
-
-#define END_BLOCK 256
-/* end of block literal code */
-
-#define REP_3_6 16
-/* repeat previous bit length 3-6 times (2 bits of repeat count) */
-
-#define REPZ_3_10 17
-/* repeat a zero length 3-10 times (3 bits of repeat count) */
-
-#define REPZ_11_138 18
-/* repeat a zero length 11-138 times (7 bits of repeat count) */
-
-local const int extra_lbits[LENGTH_CODES] /* extra bits for each length code */
- = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};
-
-local const int extra_dbits[D_CODES] /* extra bits for each distance code */
- = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
-
-local const int extra_blbits[BL_CODES]/* extra bits for each bit length code */
- = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};
-
-local const uch bl_order[BL_CODES]
- = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15};
-/* The lengths of the bit length codes are sent in order of decreasing
- * probability, to avoid transmitting the lengths for unused bit length codes.
- */
-
-#define Buf_size (8 * 2*sizeof(char))
-/* Number of bits used within bi_buf. (bi_buf might be implemented on
- * more than 16 bits on some systems.)
- */
-
-/* ===========================================================================
- * Local data. These are initialized only once.
- */
-
-#define DIST_CODE_LEN 512 /* see definition of array dist_code below */
-
-#if defined(GEN_TREES_H) || !defined(STDC)
-/* non ANSI compilers may not accept trees.h */
-
-local ct_data static_ltree[L_CODES+2];
-/* The static literal tree. Since the bit lengths are imposed, there is no
- * need for the L_CODES extra codes used during heap construction. However
- * The codes 286 and 287 are needed to build a canonical tree (see _tr_init
- * below).
- */
-
-local ct_data static_dtree[D_CODES];
-/* The static distance tree. (Actually a trivial tree since all codes use
- * 5 bits.)
- */
-
-uch _dist_code[DIST_CODE_LEN];
-/* Distance codes. The first 256 values correspond to the distances
- * 3 .. 258, the last 256 values correspond to the top 8 bits of
- * the 15 bit distances.
- */
-
-uch _length_code[MAX_MATCH-MIN_MATCH+1];
-/* length code for each normalized match length (0 == MIN_MATCH) */
-
-local int base_length[LENGTH_CODES];
-/* First normalized length for each code (0 = MIN_MATCH) */
-
-local int base_dist[D_CODES];
-/* First normalized distance for each code (0 = distance of 1) */
-
-#else
-# include "trees.h"
-#endif /* GEN_TREES_H */
-
-struct static_tree_desc_s {
- const ct_data *static_tree; /* static tree or NULL */
- const intf *extra_bits; /* extra bits for each code or NULL */
- int extra_base; /* base index for extra_bits */
- int elems; /* max number of elements in the tree */
- int max_length; /* max bit length for the codes */
-};
-
-local static_tree_desc static_l_desc =
-{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS};
-
-local static_tree_desc static_d_desc =
-{static_dtree, extra_dbits, 0, D_CODES, MAX_BITS};
-
-local static_tree_desc static_bl_desc =
-{(const ct_data *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS};
-
-/* ===========================================================================
- * Local (static) routines in this file.
- */
-
-local void tr_static_init OF((void));
-local void init_block OF((deflate_state *s));
-local void pqdownheap OF((deflate_state *s, ct_data *tree, int k));
-local void gen_bitlen OF((deflate_state *s, tree_desc *desc));
-local void gen_codes OF((ct_data *tree, int max_code, ushf *bl_count));
-local void build_tree OF((deflate_state *s, tree_desc *desc));
-local void scan_tree OF((deflate_state *s, ct_data *tree, int max_code));
-local void send_tree OF((deflate_state *s, ct_data *tree, int max_code));
-local int build_bl_tree OF((deflate_state *s));
-local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
- int blcodes));
-local void compress_block OF((deflate_state *s, ct_data *ltree,
- ct_data *dtree));
-local void set_data_type OF((deflate_state *s));
-local unsigned bi_reverse OF((unsigned value, int length));
-local void bi_windup OF((deflate_state *s));
-local void bi_flush OF((deflate_state *s));
-local void copy_block OF((deflate_state *s, charf *buf, unsigned len,
- int header));
-
-#ifdef GEN_TREES_H
-local void gen_trees_header OF((void));
-#endif
-
-#ifndef DEBUG
-# define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
- /* Send a code of the given tree. c and tree must not have side effects */
-
-#else /* DEBUG */
-# define send_code(s, c, tree) \
- { if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
- send_bits(s, tree[c].Code, tree[c].Len); }
-#endif
-
-/* ===========================================================================
- * Output a short LSB first on the stream.
- * IN assertion: there is enough room in pendingBuf.
- */
-#define put_short(s, w) { \
- put_byte(s, (uch)((w) & 0xff)); \
- put_byte(s, (uch)((ush)(w) >> 8)); \
-}
-
-/* ===========================================================================
- * Send a value on a given number of bits.
- * IN assertion: length <= 16 and value fits in length bits.
- */
-#ifdef DEBUG
-local void send_bits OF((deflate_state *s, int value, int length));
-
-local void send_bits(s, value, length)
- deflate_state *s;
- int value; /* value to send */
- int length; /* number of bits */
-{
- Tracevv((stderr," l %2d v %4x ", length, value));
- Assert(length > 0 && length <= 15, "invalid length");
- s->bits_sent += (ulg)length;
-
- /* If not enough room in bi_buf, use (valid) bits from bi_buf and
- * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
- * unused bits in value.
- */
- if (s->bi_valid > (int)Buf_size - length) {
- s->bi_buf |= (value << s->bi_valid);
- put_short(s, s->bi_buf);
- s->bi_buf = (ush)value >> (Buf_size - s->bi_valid);
- s->bi_valid += length - Buf_size;
- } else {
- s->bi_buf |= value << s->bi_valid;
- s->bi_valid += length;
- }
-}
-#else /* !DEBUG */
-
-#define send_bits(s, value, length) \
-{ int len = length;\
- if (s->bi_valid > (int)Buf_size - len) {\
- int val = value;\
- s->bi_buf |= (val << s->bi_valid);\
- put_short(s, s->bi_buf);\
- s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
- s->bi_valid += len - Buf_size;\
- } else {\
- s->bi_buf |= (value) << s->bi_valid;\
- s->bi_valid += len;\
- }\
-}
-#endif /* DEBUG */
-
-
-/* the arguments must not have side effects */
-
-/* ===========================================================================
- * Initialize the various 'constant' tables.
- */
-local void tr_static_init()
-{
-#if defined(GEN_TREES_H) || !defined(STDC)
- static int static_init_done = 0;
- int n; /* iterates over tree elements */
- int bits; /* bit counter */
- int length; /* length value */
- int code; /* code value */
- int dist; /* distance index */
- ush bl_count[MAX_BITS+1];
- /* number of codes at each bit length for an optimal tree */
-
- if (static_init_done) return;
-
- /* For some embedded targets, global variables are not initialized: */
- static_l_desc.static_tree = static_ltree;
- static_l_desc.extra_bits = extra_lbits;
- static_d_desc.static_tree = static_dtree;
- static_d_desc.extra_bits = extra_dbits;
- static_bl_desc.extra_bits = extra_blbits;
-
- /* Initialize the mapping length (0..255) -> length code (0..28) */
- length = 0;
- for (code = 0; code < LENGTH_CODES-1; code++) {
- base_length[code] = length;
- for (n = 0; n < (1<<extra_lbits[code]); n++) {
- _length_code[length++] = (uch)code;
- }
- }
- Assert (length == 256, "tr_static_init: length != 256");
- /* Note that the length 255 (match length 258) can be represented
- * in two different ways: code 284 + 5 bits or code 285, so we
- * overwrite length_code[255] to use the best encoding:
- */
- _length_code[length-1] = (uch)code;
-
- /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
- dist = 0;
- for (code = 0 ; code < 16; code++) {
- base_dist[code] = dist;
- for (n = 0; n < (1<<extra_dbits[code]); n++) {
- _dist_code[dist++] = (uch)code;
- }
- }
- Assert (dist == 256, "tr_static_init: dist != 256");
- dist >>= 7; /* from now on, all distances are divided by 128 */
- for ( ; code < D_CODES; code++) {
- base_dist[code] = dist << 7;
- for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
- _dist_code[256 + dist++] = (uch)code;
- }
- }
- Assert (dist == 256, "tr_static_init: 256+dist != 512");
-
- /* Construct the codes of the static literal tree */
- for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
- n = 0;
- while (n <= 143) static_ltree[n++].Len = 8, bl_count[8]++;
- while (n <= 255) static_ltree[n++].Len = 9, bl_count[9]++;
- while (n <= 279) static_ltree[n++].Len = 7, bl_count[7]++;
- while (n <= 287) static_ltree[n++].Len = 8, bl_count[8]++;
- /* Codes 286 and 287 do not exist, but we must include them in the
- * tree construction to get a canonical Huffman tree (longest code
- * all ones)
- */
- gen_codes((ct_data *)static_ltree, L_CODES+1, bl_count);
-
- /* The static distance tree is trivial: */
- for (n = 0; n < D_CODES; n++) {
- static_dtree[n].Len = 5;
- static_dtree[n].Code = bi_reverse((unsigned)n, 5);
- }
- static_init_done = 1;
-
-# ifdef GEN_TREES_H
- gen_trees_header();
-# endif
-#endif /* defined(GEN_TREES_H) || !defined(STDC) */
-}
-
-/* ===========================================================================
- * Genererate the file trees.h describing the static trees.
- */
-#ifdef GEN_TREES_H
-# ifndef DEBUG
-# include <stdio.h>
-# endif
-
-# define SEPARATOR(i, last, width) \
- ((i) == (last)? "\n};\n\n" : \
- ((i) % (width) == (width)-1 ? ",\n" : ", "))
-
-void gen_trees_header()
-{
- FILE *header = fopen("trees.h", "w");
- int i;
-
- Assert (header != NULL, "Can't open trees.h");
- fprintf(header,
- "/* header created automatically with -DGEN_TREES_H */\n\n");
-
- fprintf(header, "local const ct_data static_ltree[L_CODES+2] = {\n");
- for (i = 0; i < L_CODES+2; i++) {
- fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,
- static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
- }
-
- fprintf(header, "local const ct_data static_dtree[D_CODES] = {\n");
- for (i = 0; i < D_CODES; i++) {
- fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,
- static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
- }
-
- fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n");
- for (i = 0; i < DIST_CODE_LEN; i++) {
- fprintf(header, "%2u%s", _dist_code[i],
- SEPARATOR(i, DIST_CODE_LEN-1, 20));
- }
-
- fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");
- for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {
- fprintf(header, "%2u%s", _length_code[i],
- SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
- }
-
- fprintf(header, "local const int base_length[LENGTH_CODES] = {\n");
- for (i = 0; i < LENGTH_CODES; i++) {
- fprintf(header, "%1u%s", base_length[i],
- SEPARATOR(i, LENGTH_CODES-1, 20));
- }
-
- fprintf(header, "local const int base_dist[D_CODES] = {\n");
- for (i = 0; i < D_CODES; i++) {
- fprintf(header, "%5u%s", base_dist[i],
- SEPARATOR(i, D_CODES-1, 10));
- }
-
- fclose(header);
-}
-#endif /* GEN_TREES_H */
-
-/* ===========================================================================
- * Initialize the tree data structures for a new zlib stream.
- */
-void _tr_init(s)
- deflate_state *s;
-{
- tr_static_init();
-
- s->l_desc.dyn_tree = s->dyn_ltree;
- s->l_desc.stat_desc = &static_l_desc;
-
- s->d_desc.dyn_tree = s->dyn_dtree;
- s->d_desc.stat_desc = &static_d_desc;
-
- s->bl_desc.dyn_tree = s->bl_tree;
- s->bl_desc.stat_desc = &static_bl_desc;
-
- s->bi_buf = 0;
- s->bi_valid = 0;
- s->last_eob_len = 8; /* enough lookahead for inflate */
-#ifdef DEBUG
- s->compressed_len = 0L;
- s->bits_sent = 0L;
-#endif
-
- /* Initialize the first block of the first file: */
- init_block(s);
-}
-
-/* ===========================================================================
- * Initialize a new block.
- */
-local void init_block(s)
- deflate_state *s;
-{
- int n; /* iterates over tree elements */
-
- /* Initialize the trees. */
- for (n = 0; n < L_CODES; n++) s->dyn_ltree[n].Freq = 0;
- for (n = 0; n < D_CODES; n++) s->dyn_dtree[n].Freq = 0;
- for (n = 0; n < BL_CODES; n++) s->bl_tree[n].Freq = 0;
-
- s->dyn_ltree[END_BLOCK].Freq = 1;
- s->opt_len = s->static_len = 0L;
- s->last_lit = s->matches = 0;
-}
-
-#define SMALLEST 1
-/* Index within the heap array of least frequent node in the Huffman tree */
-
-
-/* ===========================================================================
- * Remove the smallest element from the heap and recreate the heap with
- * one less element. Updates heap and heap_len.
- */
-#define pqremove(s, tree, top) \
-{\
- top = s->heap[SMALLEST]; \
- s->heap[SMALLEST] = s->heap[s->heap_len--]; \
- pqdownheap(s, tree, SMALLEST); \
-}
-
-/* ===========================================================================
- * Compares to subtrees, using the tree depth as tie breaker when
- * the subtrees have equal frequency. This minimizes the worst case length.
- */
-#define smaller(tree, n, m, depth) \
- (tree[n].Freq < tree[m].Freq || \
- (tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))
-
-/* ===========================================================================
- * Restore the heap property by moving down the tree starting at node k,
- * exchanging a node with the smallest of its two sons if necessary, stopping
- * when the heap property is re-established (each father smaller than its
- * two sons).
- */
-local void pqdownheap(s, tree, k)
- deflate_state *s;
- ct_data *tree; /* the tree to restore */
- int k; /* node to move down */
-{
- int v = s->heap[k];
- int j = k << 1; /* left son of k */
- while (j <= s->heap_len) {
- /* Set j to the smallest of the two sons: */
- if (j < s->heap_len &&
- smaller(tree, s->heap[j+1], s->heap[j], s->depth)) {
- j++;
- }
- /* Exit if v is smaller than both sons */
- if (smaller(tree, v, s->heap[j], s->depth)) break;
-
- /* Exchange v with the smallest son */
- s->heap[k] = s->heap[j]; k = j;
-
- /* And continue down the tree, setting j to the left son of k */
- j <<= 1;
- }
- s->heap[k] = v;
-}
-
-/* ===========================================================================
- * Compute the optimal bit lengths for a tree and update the total bit length
- * for the current block.
- * IN assertion: the fields freq and dad are set, heap[heap_max] and
- * above are the tree nodes sorted by increasing frequency.
- * OUT assertions: the field len is set to the optimal bit length, the
- * array bl_count contains the frequencies for each bit length.
- * The length opt_len is updated; static_len is also updated if stree is
- * not null.
- */
-local void gen_bitlen(s, desc)
- deflate_state *s;
- tree_desc *desc; /* the tree descriptor */
-{
- ct_data *tree = desc->dyn_tree;
- int max_code = desc->max_code;
- const ct_data *stree = desc->stat_desc->static_tree;
- const intf *extra = desc->stat_desc->extra_bits;
- int base = desc->stat_desc->extra_base;
- int max_length = desc->stat_desc->max_length;
- int h; /* heap index */
- int n, m; /* iterate over the tree elements */
- int bits; /* bit length */
- int xbits; /* extra bits */
- ush f; /* frequency */
- int overflow = 0; /* number of elements with bit length too large */
-
- for (bits = 0; bits <= MAX_BITS; bits++) s->bl_count[bits] = 0;
-
- /* In a first pass, compute the optimal bit lengths (which may
- * overflow in the case of the bit length tree).
- */
- tree[s->heap[s->heap_max]].Len = 0; /* root of the heap */
-
- for (h = s->heap_max+1; h < HEAP_SIZE; h++) {
- n = s->heap[h];
- bits = tree[tree[n].Dad].Len + 1;
- if (bits > max_length) bits = max_length, overflow++;
- tree[n].Len = (ush)bits;
- /* We overwrite tree[n].Dad which is no longer needed */
-
- if (n > max_code) continue; /* not a leaf node */
-
- s->bl_count[bits]++;
- xbits = 0;
- if (n >= base) xbits = extra[n-base];
- f = tree[n].Freq;
- s->opt_len += (ulg)f * (bits + xbits);
- if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits);
- }
- if (overflow == 0) return;
-
- Trace((stderr,"\nbit length overflow\n"));
- /* This happens for example on obj2 and pic of the Calgary corpus */
-
- /* Find the first bit length which could increase: */
- do {
- bits = max_length-1;
- while (s->bl_count[bits] == 0) bits--;
- s->bl_count[bits]--; /* move one leaf down the tree */
- s->bl_count[bits+1] += 2; /* move one overflow item as its brother */
- s->bl_count[max_length]--;
- /* The brother of the overflow item also moves one step up,
- * but this does not affect bl_count[max_length]
- */
- overflow -= 2;
- } while (overflow > 0);
-
- /* Now recompute all bit lengths, scanning in increasing frequency.
- * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
- * lengths instead of fixing only the wrong ones. This idea is taken
- * from 'ar' written by Haruhiko Okumura.)
- */
- for (bits = max_length; bits != 0; bits--) {
- n = s->bl_count[bits];
- while (n != 0) {
- m = s->heap[--h];
- if (m > max_code) continue;
- if ((unsigned) tree[m].Len != (unsigned) bits) {
- Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
- s->opt_len += ((long)bits - (long)tree[m].Len)
- *(long)tree[m].Freq;
- tree[m].Len = (ush)bits;
- }
- n--;
- }
- }
-}
-
-/* ===========================================================================
- * Generate the codes for a given tree and bit counts (which need not be
- * optimal).
- * IN assertion: the array bl_count contains the bit length statistics for
- * the given tree and the field len is set for all tree elements.
- * OUT assertion: the field code is set for all tree elements of non
- * zero code length.
- */
-local void gen_codes (tree, max_code, bl_count)
- ct_data *tree; /* the tree to decorate */
- int max_code; /* largest code with non zero frequency */
- ushf *bl_count; /* number of codes at each bit length */
-{
- ush next_code[MAX_BITS+1]; /* next code value for each bit length */
- ush code = 0; /* running code value */
- int bits; /* bit index */
- int n; /* code index */
-
- /* The distribution counts are first used to generate the code values
- * without bit reversal.
- */
- for (bits = 1; bits <= MAX_BITS; bits++) {
- next_code[bits] = code = (code + bl_count[bits-1]) << 1;
- }
- /* Check that the bit counts in bl_count are consistent. The last code
- * must be all ones.
- */
- Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
- "inconsistent bit counts");
- Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
-
- for (n = 0; n <= max_code; n++) {
- int len = tree[n].Len;
- if (len == 0) continue;
- /* Now reverse the bits */
- tree[n].Code = bi_reverse(next_code[len]++, len);
-
- Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
- n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
- }
-}
-
-/* ===========================================================================
- * Construct one Huffman tree and assigns the code bit strings and lengths.
- * Update the total bit length for the current block.
- * IN assertion: the field freq is set for all tree elements.
- * OUT assertions: the fields len and code are set to the optimal bit length
- * and corresponding code. The length opt_len is updated; static_len is
- * also updated if stree is not null. The field max_code is set.
- */
-local void build_tree(s, desc)
- deflate_state *s;
- tree_desc *desc; /* the tree descriptor */
-{
- ct_data *tree = desc->dyn_tree;
- const ct_data *stree = desc->stat_desc->static_tree;
- int elems = desc->stat_desc->elems;
- int n, m; /* iterate over heap elements */
- int max_code = -1; /* largest code with non zero frequency */
- int node; /* new node being created */
-
- /* Construct the initial heap, with least frequent element in
- * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
- * heap[0] is not used.
- */
- s->heap_len = 0, s->heap_max = HEAP_SIZE;
-
- for (n = 0; n < elems; n++) {
- if (tree[n].Freq != 0) {
- s->heap[++(s->heap_len)] = max_code = n;
- s->depth[n] = 0;
- } else {
- tree[n].Len = 0;
- }
- }
-
- /* The pkzip format requires that at least one distance code exists,
- * and that at least one bit should be sent even if there is only one
- * possible code. So to avoid special checks later on we force at least
- * two codes of non zero frequency.
- */
- while (s->heap_len < 2) {
- node = s->heap[++(s->heap_len)] = (max_code < 2 ? ++max_code : 0);
- tree[node].Freq = 1;
- s->depth[node] = 0;
- s->opt_len--; if (stree) s->static_len -= stree[node].Len;
- /* node is 0 or 1 so it does not have extra bits */
- }
- desc->max_code = max_code;
-
- /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
- * establish sub-heaps of increasing lengths:
- */
- for (n = s->heap_len/2; n >= 1; n--) pqdownheap(s, tree, n);
-
- /* Construct the Huffman tree by repeatedly combining the least two
- * frequent nodes.
- */
- node = elems; /* next internal node of the tree */
- do {
- pqremove(s, tree, n); /* n = node of least frequency */
- m = s->heap[SMALLEST]; /* m = node of next least frequency */
-
- s->heap[--(s->heap_max)] = n; /* keep the nodes sorted by frequency */
- s->heap[--(s->heap_max)] = m;
-
- /* Create a new node father of n and m */
- tree[node].Freq = tree[n].Freq + tree[m].Freq;
- s->depth[node] = (uch)((s->depth[n] >= s->depth[m] ?
- s->depth[n] : s->depth[m]) + 1);
- tree[n].Dad = tree[m].Dad = (ush)node;
-#ifdef DUMP_BL_TREE
- if (tree == s->bl_tree) {
- fprintf(stderr,"\nnode %d(%d), sons %d(%d) %d(%d)",
- node, tree[node].Freq, n, tree[n].Freq, m, tree[m].Freq);
- }
-#endif
- /* and insert the new node in the heap */
- s->heap[SMALLEST] = node++;
- pqdownheap(s, tree, SMALLEST);
-
- } while (s->heap_len >= 2);
-
- s->heap[--(s->heap_max)] = s->heap[SMALLEST];
-
- /* At this point, the fields freq and dad are set. We can now
- * generate the bit lengths.
- */
- gen_bitlen(s, (tree_desc *)desc);
-
- /* The field len is now set, we can generate the bit codes */
- gen_codes ((ct_data *)tree, max_code, s->bl_count);
-}
-
-/* ===========================================================================
- * Scan a literal or distance tree to determine the frequencies of the codes
- * in the bit length tree.
- */
-local void scan_tree (s, tree, max_code)
- deflate_state *s;
- ct_data *tree; /* the tree to be scanned */
- int max_code; /* and its largest code of non zero frequency */
-{
- int n; /* iterates over all tree elements */
- int prevlen = -1; /* last emitted length */
- int curlen; /* length of current code */
- int nextlen = tree[0].Len; /* length of next code */
- int count = 0; /* repeat count of the current code */
- int max_count = 7; /* max repeat count */
- int min_count = 4; /* min repeat count */
-
- if (nextlen == 0) max_count = 138, min_count = 3;
- tree[max_code+1].Len = (ush)0xffff; /* guard */
-
- for (n = 0; n <= max_code; n++) {
- curlen = nextlen; nextlen = tree[n+1].Len;
- if (++count < max_count && curlen == nextlen) {
- continue;
- } else if (count < min_count) {
- s->bl_tree[curlen].Freq += count;
- } else if (curlen != 0) {
- if (curlen != prevlen) s->bl_tree[curlen].Freq++;
- s->bl_tree[REP_3_6].Freq++;
- } else if (count <= 10) {
- s->bl_tree[REPZ_3_10].Freq++;
- } else {
- s->bl_tree[REPZ_11_138].Freq++;
- }
- count = 0; prevlen = curlen;
- if (nextlen == 0) {
- max_count = 138, min_count = 3;
- } else if (curlen == nextlen) {
- max_count = 6, min_count = 3;
- } else {
- max_count = 7, min_count = 4;
- }
- }
-}
-
-/* ===========================================================================
- * Send a literal or distance tree in compressed form, using the codes in
- * bl_tree.
- */
-local void send_tree (s, tree, max_code)
- deflate_state *s;
- ct_data *tree; /* the tree to be scanned */
- int max_code; /* and its largest code of non zero frequency */
-{
- int n; /* iterates over all tree elements */
- int prevlen = -1; /* last emitted length */
- int curlen; /* length of current code */
- int nextlen = tree[0].Len; /* length of next code */
- int count = 0; /* repeat count of the current code */
- int max_count = 7; /* max repeat count */
- int min_count = 4; /* min repeat count */
-
- /* tree[max_code+1].Len = -1; */ /* guard already set */
- if (nextlen == 0) max_count = 138, min_count = 3;
-
- for (n = 0; n <= max_code; n++) {
- curlen = nextlen; nextlen = tree[n+1].Len;
- if (++count < max_count && curlen == nextlen) {
- continue;
- } else if (count < min_count) {
- do { send_code(s, curlen, s->bl_tree); } while (--count != 0);
-
- } else if (curlen != 0) {
- if (curlen != prevlen) {
- send_code(s, curlen, s->bl_tree); count--;
- }
- Assert(count >= 3 && count <= 6, " 3_6?");
- send_code(s, REP_3_6, s->bl_tree); send_bits(s, count-3, 2);
-
- } else if (count <= 10) {
- send_code(s, REPZ_3_10, s->bl_tree); send_bits(s, count-3, 3);
-
- } else {
- send_code(s, REPZ_11_138, s->bl_tree); send_bits(s, count-11, 7);
- }
- count = 0; prevlen = curlen;
- if (nextlen == 0) {
- max_count = 138, min_count = 3;
- } else if (curlen == nextlen) {
- max_count = 6, min_count = 3;
- } else {
- max_count = 7, min_count = 4;
- }
- }
-}
-
-/* ===========================================================================
- * Construct the Huffman tree for the bit lengths and return the index in
- * bl_order of the last bit length code to send.
- */
-local int build_bl_tree(s)
- deflate_state *s;
-{
- int max_blindex; /* index of last bit length code of non zero freq */
-
- /* Determine the bit length frequencies for literal and distance trees */
- scan_tree(s, (ct_data *)s->dyn_ltree, s->l_desc.max_code);
- scan_tree(s, (ct_data *)s->dyn_dtree, s->d_desc.max_code);
-
- /* Build the bit length tree: */
- build_tree(s, (tree_desc *)(&(s->bl_desc)));
- /* opt_len now includes the length of the tree representations, except
- * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
- */
-
- /* Determine the number of bit length codes to send. The pkzip format
- * requires that at least 4 bit length codes be sent. (appnote.txt says
- * 3 but the actual value used is 4.)
- */
- for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {
- if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
- }
- /* Update opt_len to include the bit length tree and counts */
- s->opt_len += 3*(max_blindex+1) + 5+5+4;
- Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
- s->opt_len, s->static_len));
-
- return max_blindex;
-}
-
-/* ===========================================================================
- * Send the header for a block using dynamic Huffman trees: the counts, the
- * lengths of the bit length codes, the literal tree and the distance tree.
- * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
- */
-local void send_all_trees(s, lcodes, dcodes, blcodes)
- deflate_state *s;
- int lcodes, dcodes, blcodes; /* number of codes for each tree */
-{
- int rank; /* index in bl_order */
-
- Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
- Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
- "too many codes");
- Tracev((stderr, "\nbl counts: "));
- send_bits(s, lcodes-257, 5); /* not +255 as stated in appnote.txt */
- send_bits(s, dcodes-1, 5);
- send_bits(s, blcodes-4, 4); /* not -3 as stated in appnote.txt */
- for (rank = 0; rank < blcodes; rank++) {
- Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
- send_bits(s, s->bl_tree[bl_order[rank]].Len, 3);
- }
- Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));
-
- send_tree(s, (ct_data *)s->dyn_ltree, lcodes-1); /* literal tree */
- Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));
-
- send_tree(s, (ct_data *)s->dyn_dtree, dcodes-1); /* distance tree */
- Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
-}
-
-/* ===========================================================================
- * Send a stored block
- */
-void _tr_stored_block(s, buf, stored_len, eof)
- deflate_state *s;
- charf *buf; /* input block */
- ulg stored_len; /* length of input block */
- int eof; /* true if this is the last block for a file */
-{
- send_bits(s, (STORED_BLOCK<<1)+eof, 3); /* send block type */
-#ifdef DEBUG
- s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
- s->compressed_len += (stored_len + 4) << 3;
-#endif
- copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
-}
-
-/* ===========================================================================
- * Send one empty static block to give enough lookahead for inflate.
- * This takes 10 bits, of which 7 may remain in the bit buffer.
- * The current inflate code requires 9 bits of lookahead. If the
- * last two codes for the previous block (real code plus EOB) were coded
- * on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
- * the last real code. In this case we send two empty static blocks instead
- * of one. (There are no problems if the previous block is stored or fixed.)
- * To simplify the code, we assume the worst case of last real code encoded
- * on one bit only.
- */
-void _tr_align(s)
- deflate_state *s;
-{
- send_bits(s, STATIC_TREES<<1, 3);
- send_code(s, END_BLOCK, static_ltree);
-#ifdef DEBUG
- s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
-#endif
- bi_flush(s);
- /* Of the 10 bits for the empty block, we have already sent
- * (10 - bi_valid) bits. The lookahead for the last real code (before
- * the EOB of the previous block) was thus at least one plus the length
- * of the EOB plus what we have just sent of the empty static block.
- */
- if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
- send_bits(s, STATIC_TREES<<1, 3);
- send_code(s, END_BLOCK, static_ltree);
-#ifdef DEBUG
- s->compressed_len += 10L;
-#endif
- bi_flush(s);
- }
- s->last_eob_len = 7;
-}
-
-/* ===========================================================================
- * Determine the best encoding for the current block: dynamic trees, static
- * trees or store, and output the encoded block to the zip file.
- */
-void _tr_flush_block(s, buf, stored_len, eof)
- deflate_state *s;
- charf *buf; /* input block, or NULL if too old */
- ulg stored_len; /* length of input block */
- int eof; /* true if this is the last block for a file */
-{
- ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
- int max_blindex = 0; /* index of last bit length code of non zero freq */
-
- /* Build the Huffman trees unless a stored block is forced */
- if (s->level > 0) {
-
- /* Check if the file is binary or text */
- if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN)
- set_data_type(s);
-
- /* Construct the literal and distance trees */
- build_tree(s, (tree_desc *)(&(s->l_desc)));
- Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
- s->static_len));
-
- build_tree(s, (tree_desc *)(&(s->d_desc)));
- Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
- s->static_len));
- /* At this point, opt_len and static_len are the total bit lengths of
- * the compressed block data, excluding the tree representations.
- */
-
- /* Build the bit length tree for the above two trees, and get the index
- * in bl_order of the last bit length code to send.
- */
- max_blindex = build_bl_tree(s);
-
- /* Determine the best encoding. Compute the block lengths in bytes. */
- opt_lenb = (s->opt_len+3+7)>>3;
- static_lenb = (s->static_len+3+7)>>3;
-
- Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
- opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
- s->last_lit));
-
- if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
-
- } else {
- Assert(buf != (char*)0, "lost buf");
- opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
- }
-
-#ifdef FORCE_STORED
- if (buf != (char*)0) { /* force stored block */
-#else
- if (stored_len+4 <= opt_lenb && buf != (char*)0) {
- /* 4: two words for the lengths */
-#endif
- /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
- * Otherwise we can't have processed more than WSIZE input bytes since
- * the last block flush, because compression would have been
- * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
- * transform a block into a stored block.
- */
- _tr_stored_block(s, buf, stored_len, eof);
-
-#ifdef FORCE_STATIC
- } else if (static_lenb >= 0) { /* force static trees */
-#else
- } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) {
-#endif
- send_bits(s, (STATIC_TREES<<1)+eof, 3);
- compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
-#ifdef DEBUG
- s->compressed_len += 3 + s->static_len;
-#endif
- } else {
- send_bits(s, (DYN_TREES<<1)+eof, 3);
- send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
- max_blindex+1);
- compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
-#ifdef DEBUG
- s->compressed_len += 3 + s->opt_len;
-#endif
- }
- Assert (s->compressed_len == s->bits_sent, "bad compressed size");
- /* The above check is made mod 2^32, for files larger than 512 MB
- * and uLong implemented on 32 bits.
- */
- init_block(s);
-
- if (eof) {
- bi_windup(s);
-#ifdef DEBUG
- s->compressed_len += 7; /* align on byte boundary */
-#endif
- }
- Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
- s->compressed_len-7*eof));
-}
-
-/* ===========================================================================
- * Save the match info and tally the frequency counts. Return true if
- * the current block must be flushed.
- */
-int _tr_tally (s, dist, lc)
- deflate_state *s;
- unsigned dist; /* distance of matched string */
- unsigned lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */
-{
- s->d_buf[s->last_lit] = (ush)dist;
- s->l_buf[s->last_lit++] = (uch)lc;
- if (dist == 0) {
- /* lc is the unmatched char */
- s->dyn_ltree[lc].Freq++;
- } else {
- s->matches++;
- /* Here, lc is the match length - MIN_MATCH */
- dist--; /* dist = match distance - 1 */
- Assert((ush)dist < (ush)MAX_DIST(s) &&
- (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
- (ush)d_code(dist) < (ush)D_CODES, "_tr_tally: bad match");
-
- s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
- s->dyn_dtree[d_code(dist)].Freq++;
- }
-
-#ifdef TRUNCATE_BLOCK
- /* Try to guess if it is profitable to stop the current block here */
- if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
- /* Compute an upper bound for the compressed length */
- ulg out_length = (ulg)s->last_lit*8L;
- ulg in_length = (ulg)((long)s->strstart - s->block_start);
- int dcode;
- for (dcode = 0; dcode < D_CODES; dcode++) {
- out_length += (ulg)s->dyn_dtree[dcode].Freq *
- (5L+extra_dbits[dcode]);
- }
- out_length >>= 3;
- Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
- s->last_lit, in_length, out_length,
- 100L - out_length*100L/in_length));
- if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
- }
-#endif
- return (s->last_lit == s->lit_bufsize-1);
- /* We avoid equality with lit_bufsize because of wraparound at 64K
- * on 16 bit machines and because stored blocks are restricted to
- * 64K-1 bytes.
- */
-}
-
-/* ===========================================================================
- * Send the block data compressed using the given Huffman trees
- */
-local void compress_block(s, ltree, dtree)
- deflate_state *s;
- ct_data *ltree; /* literal tree */
- ct_data *dtree; /* distance tree */
-{
- unsigned dist; /* distance of matched string */
- int lc; /* match length or unmatched char (if dist == 0) */
- unsigned lx = 0; /* running index in l_buf */
- unsigned code; /* the code to send */
- int extra; /* number of extra bits to send */
-
- if (s->last_lit != 0) do {
- dist = s->d_buf[lx];
- lc = s->l_buf[lx++];
- if (dist == 0) {
- send_code(s, lc, ltree); /* send a literal byte */
- Tracecv(isgraph(lc), (stderr," '%c' ", lc));
- } else {
- /* Here, lc is the match length - MIN_MATCH */
- code = _length_code[lc];
- send_code(s, code+LITERALS+1, ltree); /* send the length code */
- extra = extra_lbits[code];
- if (extra != 0) {
- lc -= base_length[code];
- send_bits(s, lc, extra); /* send the extra length bits */
- }
- dist--; /* dist is now the match distance - 1 */
- code = d_code(dist);
- Assert (code < D_CODES, "bad d_code");
-
- send_code(s, code, dtree); /* send the distance code */
- extra = extra_dbits[code];
- if (extra != 0) {
- dist -= base_dist[code];
- send_bits(s, dist, extra); /* send the extra distance bits */
- }
- } /* literal or match pair ? */
-
- /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
- Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
- "pendingBuf overflow");
-
- } while (lx < s->last_lit);
-
- send_code(s, END_BLOCK, ltree);
- s->last_eob_len = ltree[END_BLOCK].Len;
-}
-
-/* ===========================================================================
- * Set the data type to BINARY or TEXT, using a crude approximation:
- * set it to Z_TEXT if all symbols are either printable characters (33 to 255)
- * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise.
- * IN assertion: the fields Freq of dyn_ltree are set.
- */
-local void set_data_type(s)
- deflate_state *s;
-{
- int n;
-
- for (n = 0; n < 9; n++)
- if (s->dyn_ltree[n].Freq != 0)
- break;
- if (n == 9)
- for (n = 14; n < 32; n++)
- if (s->dyn_ltree[n].Freq != 0)
- break;
- s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY;
-}
-
-/* ===========================================================================
- * Reverse the first len bits of a code, using straightforward code (a faster
- * method would use a table)
- * IN assertion: 1 <= len <= 15
- */
-local unsigned bi_reverse(code, len)
- unsigned code; /* the value to invert */
- int len; /* its bit length */
-{
- register unsigned res = 0;
- do {
- res |= code & 1;
- code >>= 1, res <<= 1;
- } while (--len > 0);
- return res >> 1;
-}
-
-/* ===========================================================================
- * Flush the bit buffer, keeping at most 7 bits in it.
- */
-local void bi_flush(s)
- deflate_state *s;
-{
- if (s->bi_valid == 16) {
- put_short(s, s->bi_buf);
- s->bi_buf = 0;
- s->bi_valid = 0;
- } else if (s->bi_valid >= 8) {
- put_byte(s, (Byte)s->bi_buf);
- s->bi_buf >>= 8;
- s->bi_valid -= 8;
- }
-}
-
-/* ===========================================================================
- * Flush the bit buffer and align the output on a byte boundary
- */
-local void bi_windup(s)
- deflate_state *s;
-{
- if (s->bi_valid > 8) {
- put_short(s, s->bi_buf);
- } else if (s->bi_valid > 0) {
- put_byte(s, (Byte)s->bi_buf);
- }
- s->bi_buf = 0;
- s->bi_valid = 0;
-#ifdef DEBUG
- s->bits_sent = (s->bits_sent+7) & ~7;
-#endif
-}
-
-/* ===========================================================================
- * Copy a stored block, storing first the length and its
- * one's complement if requested.
- */
-local void copy_block(s, buf, len, header)
- deflate_state *s;
- charf *buf; /* the input data */
- unsigned len; /* its length */
- int header; /* true if block header must be written */
-{
- bi_windup(s); /* align on byte boundary */
- s->last_eob_len = 8; /* enough lookahead for inflate */
-
- if (header) {
- put_short(s, (ush)len);
- put_short(s, (ush)~len);
-#ifdef DEBUG
- s->bits_sent += 2*16;
-#endif
- }
-#ifdef DEBUG
- s->bits_sent += (ulg)len<<3;
-#endif
- while (len--) {
- put_byte(s, *buf++);
- }
-}
+++ /dev/null
-/* header created automatically with -DGEN_TREES_H */
-
-local const ct_data static_ltree[L_CODES+2] = {
-{{ 12},{ 8}}, {{140},{ 8}}, {{ 76},{ 8}}, {{204},{ 8}}, {{ 44},{ 8}},
-{{172},{ 8}}, {{108},{ 8}}, {{236},{ 8}}, {{ 28},{ 8}}, {{156},{ 8}},
-{{ 92},{ 8}}, {{220},{ 8}}, {{ 60},{ 8}}, {{188},{ 8}}, {{124},{ 8}},
-{{252},{ 8}}, {{ 2},{ 8}}, {{130},{ 8}}, {{ 66},{ 8}}, {{194},{ 8}},
-{{ 34},{ 8}}, {{162},{ 8}}, {{ 98},{ 8}}, {{226},{ 8}}, {{ 18},{ 8}},
-{{146},{ 8}}, {{ 82},{ 8}}, {{210},{ 8}}, {{ 50},{ 8}}, {{178},{ 8}},
-{{114},{ 8}}, {{242},{ 8}}, {{ 10},{ 8}}, {{138},{ 8}}, {{ 74},{ 8}},
-{{202},{ 8}}, {{ 42},{ 8}}, {{170},{ 8}}, {{106},{ 8}}, {{234},{ 8}},
-{{ 26},{ 8}}, {{154},{ 8}}, {{ 90},{ 8}}, {{218},{ 8}}, {{ 58},{ 8}},
-{{186},{ 8}}, {{122},{ 8}}, {{250},{ 8}}, {{ 6},{ 8}}, {{134},{ 8}},
-{{ 70},{ 8}}, {{198},{ 8}}, {{ 38},{ 8}}, {{166},{ 8}}, {{102},{ 8}},
-{{230},{ 8}}, {{ 22},{ 8}}, {{150},{ 8}}, {{ 86},{ 8}}, {{214},{ 8}},
-{{ 54},{ 8}}, {{182},{ 8}}, {{118},{ 8}}, {{246},{ 8}}, {{ 14},{ 8}},
-{{142},{ 8}}, {{ 78},{ 8}}, {{206},{ 8}}, {{ 46},{ 8}}, {{174},{ 8}},
-{{110},{ 8}}, {{238},{ 8}}, {{ 30},{ 8}}, {{158},{ 8}}, {{ 94},{ 8}},
-{{222},{ 8}}, {{ 62},{ 8}}, {{190},{ 8}}, {{126},{ 8}}, {{254},{ 8}},
-{{ 1},{ 8}}, {{129},{ 8}}, {{ 65},{ 8}}, {{193},{ 8}}, {{ 33},{ 8}},
-{{161},{ 8}}, {{ 97},{ 8}}, {{225},{ 8}}, {{ 17},{ 8}}, {{145},{ 8}},
-{{ 81},{ 8}}, {{209},{ 8}}, {{ 49},{ 8}}, {{177},{ 8}}, {{113},{ 8}},
-{{241},{ 8}}, {{ 9},{ 8}}, {{137},{ 8}}, {{ 73},{ 8}}, {{201},{ 8}},
-{{ 41},{ 8}}, {{169},{ 8}}, {{105},{ 8}}, {{233},{ 8}}, {{ 25},{ 8}},
-{{153},{ 8}}, {{ 89},{ 8}}, {{217},{ 8}}, {{ 57},{ 8}}, {{185},{ 8}},
-{{121},{ 8}}, {{249},{ 8}}, {{ 5},{ 8}}, {{133},{ 8}}, {{ 69},{ 8}},
-{{197},{ 8}}, {{ 37},{ 8}}, {{165},{ 8}}, {{101},{ 8}}, {{229},{ 8}},
-{{ 21},{ 8}}, {{149},{ 8}}, {{ 85},{ 8}}, {{213},{ 8}}, {{ 53},{ 8}},
-{{181},{ 8}}, {{117},{ 8}}, {{245},{ 8}}, {{ 13},{ 8}}, {{141},{ 8}},
-{{ 77},{ 8}}, {{205},{ 8}}, {{ 45},{ 8}}, {{173},{ 8}}, {{109},{ 8}},
-{{237},{ 8}}, {{ 29},{ 8}}, {{157},{ 8}}, {{ 93},{ 8}}, {{221},{ 8}},
-{{ 61},{ 8}}, {{189},{ 8}}, {{125},{ 8}}, {{253},{ 8}}, {{ 19},{ 9}},
-{{275},{ 9}}, {{147},{ 9}}, {{403},{ 9}}, {{ 83},{ 9}}, {{339},{ 9}},
-{{211},{ 9}}, {{467},{ 9}}, {{ 51},{ 9}}, {{307},{ 9}}, {{179},{ 9}},
-{{435},{ 9}}, {{115},{ 9}}, {{371},{ 9}}, {{243},{ 9}}, {{499},{ 9}},
-{{ 11},{ 9}}, {{267},{ 9}}, {{139},{ 9}}, {{395},{ 9}}, {{ 75},{ 9}},
-{{331},{ 9}}, {{203},{ 9}}, {{459},{ 9}}, {{ 43},{ 9}}, {{299},{ 9}},
-{{171},{ 9}}, {{427},{ 9}}, {{107},{ 9}}, {{363},{ 9}}, {{235},{ 9}},
-{{491},{ 9}}, {{ 27},{ 9}}, {{283},{ 9}}, {{155},{ 9}}, {{411},{ 9}},
-{{ 91},{ 9}}, {{347},{ 9}}, {{219},{ 9}}, {{475},{ 9}}, {{ 59},{ 9}},
-{{315},{ 9}}, {{187},{ 9}}, {{443},{ 9}}, {{123},{ 9}}, {{379},{ 9}},
-{{251},{ 9}}, {{507},{ 9}}, {{ 7},{ 9}}, {{263},{ 9}}, {{135},{ 9}},
-{{391},{ 9}}, {{ 71},{ 9}}, {{327},{ 9}}, {{199},{ 9}}, {{455},{ 9}},
-{{ 39},{ 9}}, {{295},{ 9}}, {{167},{ 9}}, {{423},{ 9}}, {{103},{ 9}},
-{{359},{ 9}}, {{231},{ 9}}, {{487},{ 9}}, {{ 23},{ 9}}, {{279},{ 9}},
-{{151},{ 9}}, {{407},{ 9}}, {{ 87},{ 9}}, {{343},{ 9}}, {{215},{ 9}},
-{{471},{ 9}}, {{ 55},{ 9}}, {{311},{ 9}}, {{183},{ 9}}, {{439},{ 9}},
-{{119},{ 9}}, {{375},{ 9}}, {{247},{ 9}}, {{503},{ 9}}, {{ 15},{ 9}},
-{{271},{ 9}}, {{143},{ 9}}, {{399},{ 9}}, {{ 79},{ 9}}, {{335},{ 9}},
-{{207},{ 9}}, {{463},{ 9}}, {{ 47},{ 9}}, {{303},{ 9}}, {{175},{ 9}},
-{{431},{ 9}}, {{111},{ 9}}, {{367},{ 9}}, {{239},{ 9}}, {{495},{ 9}},
-{{ 31},{ 9}}, {{287},{ 9}}, {{159},{ 9}}, {{415},{ 9}}, {{ 95},{ 9}},
-{{351},{ 9}}, {{223},{ 9}}, {{479},{ 9}}, {{ 63},{ 9}}, {{319},{ 9}},
-{{191},{ 9}}, {{447},{ 9}}, {{127},{ 9}}, {{383},{ 9}}, {{255},{ 9}},
-{{511},{ 9}}, {{ 0},{ 7}}, {{ 64},{ 7}}, {{ 32},{ 7}}, {{ 96},{ 7}},
-{{ 16},{ 7}}, {{ 80},{ 7}}, {{ 48},{ 7}}, {{112},{ 7}}, {{ 8},{ 7}},
-{{ 72},{ 7}}, {{ 40},{ 7}}, {{104},{ 7}}, {{ 24},{ 7}}, {{ 88},{ 7}},
-{{ 56},{ 7}}, {{120},{ 7}}, {{ 4},{ 7}}, {{ 68},{ 7}}, {{ 36},{ 7}},
-{{100},{ 7}}, {{ 20},{ 7}}, {{ 84},{ 7}}, {{ 52},{ 7}}, {{116},{ 7}},
-{{ 3},{ 8}}, {{131},{ 8}}, {{ 67},{ 8}}, {{195},{ 8}}, {{ 35},{ 8}},
-{{163},{ 8}}, {{ 99},{ 8}}, {{227},{ 8}}
-};
-
-local const ct_data static_dtree[D_CODES] = {
-{{ 0},{ 5}}, {{16},{ 5}}, {{ 8},{ 5}}, {{24},{ 5}}, {{ 4},{ 5}},
-{{20},{ 5}}, {{12},{ 5}}, {{28},{ 5}}, {{ 2},{ 5}}, {{18},{ 5}},
-{{10},{ 5}}, {{26},{ 5}}, {{ 6},{ 5}}, {{22},{ 5}}, {{14},{ 5}},
-{{30},{ 5}}, {{ 1},{ 5}}, {{17},{ 5}}, {{ 9},{ 5}}, {{25},{ 5}},
-{{ 5},{ 5}}, {{21},{ 5}}, {{13},{ 5}}, {{29},{ 5}}, {{ 3},{ 5}},
-{{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}}
-};
-
-const uch _dist_code[DIST_CODE_LEN] = {
- 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8,
- 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10,
-10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
-11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
-12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13,
-13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
-13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15,
-15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
-15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
-15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 0, 0, 16, 17,
-18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22,
-23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
-26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
-26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27,
-27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
-27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
-28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
-28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
-28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
-29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
-29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
-29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29
-};
-
-const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 12,
-13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
-17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
-19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
-21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22,
-22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
-23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
-25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26,
-26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
-26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
-27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28
-};
-
-local const int base_length[LENGTH_CODES] = {
-0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
-64, 80, 96, 112, 128, 160, 192, 224, 0
-};
-
-local const int base_dist[D_CODES] = {
- 0, 1, 2, 3, 4, 6, 8, 12, 16, 24,
- 32, 48, 64, 96, 128, 192, 256, 384, 512, 768,
- 1024, 1536, 2048, 3072, 4096, 6144, 8192, 12288, 16384, 24576
-};
-
+++ /dev/null
-/* uncompr.c -- decompress a memory buffer
- * Copyright (C) 1995-2003 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#define ZLIB_INTERNAL
-#include "zlib.h"
-
-/* ===========================================================================
- Decompresses the source buffer into the destination buffer. sourceLen is
- the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be large enough to hold the
- entire uncompressed data. (The size of the uncompressed data must have
- been saved previously by the compressor and transmitted to the decompressor
- by some mechanism outside the scope of this compression library.)
- Upon exit, destLen is the actual size of the compressed buffer.
- This function can be used to decompress a whole file at once if the
- input file is mmap'ed.
-
- uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
- enough memory, Z_BUF_ERROR if there was not enough room in the output
- buffer, or Z_DATA_ERROR if the input data was corrupted.
-*/
-int ZEXPORT uncompress (dest, destLen, source, sourceLen)
- Bytef *dest;
- uLongf *destLen;
- const Bytef *source;
- uLong sourceLen;
-{
- z_stream stream;
- int err;
-
- stream.next_in = (Bytef*)source;
- stream.avail_in = (uInt)sourceLen;
- /* Check for source > 64K on 16-bit machine: */
- if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-
- stream.next_out = dest;
- stream.avail_out = (uInt)*destLen;
- if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
-
- stream.zalloc = (alloc_func)0;
- stream.zfree = (free_func)0;
-
- err = inflateInit(&stream);
- if (err != Z_OK) return err;
-
- err = inflate(&stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- inflateEnd(&stream);
- if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
- return Z_DATA_ERROR;
- return err;
- }
- *destLen = stream.total_out;
-
- err = inflateEnd(&stream);
- return err;
-}
+++ /dev/null
-/* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2005 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#ifndef ZCONF_H
-#define ZCONF_H
-
-/*
- * If you *really* need a unique prefix for all types and library functions,
- * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
- */
-#ifdef Z_PREFIX
-# define deflateInit_ z_deflateInit_
-# define deflate z_deflate
-# define deflateEnd z_deflateEnd
-# define inflateInit_ z_inflateInit_
-# define inflate z_inflate
-# define inflateEnd z_inflateEnd
-# define deflateInit2_ z_deflateInit2_
-# define deflateSetDictionary z_deflateSetDictionary
-# define deflateCopy z_deflateCopy
-# define deflateReset z_deflateReset
-# define deflateParams z_deflateParams
-# define deflateBound z_deflateBound
-# define deflatePrime z_deflatePrime
-# define inflateInit2_ z_inflateInit2_
-# define inflateSetDictionary z_inflateSetDictionary
-# define inflateSync z_inflateSync
-# define inflateSyncPoint z_inflateSyncPoint
-# define inflateCopy z_inflateCopy
-# define inflateReset z_inflateReset
-# define inflateBack z_inflateBack
-# define inflateBackEnd z_inflateBackEnd
-# define compress z_compress
-# define compress2 z_compress2
-# define compressBound z_compressBound
-# define uncompress z_uncompress
-# define adler32 z_adler32
-# define crc32 z_crc32
-# define get_crc_table z_get_crc_table
-# define zError z_zError
-
-# define alloc_func z_alloc_func
-# define free_func z_free_func
-# define in_func z_in_func
-# define out_func z_out_func
-# define Byte z_Byte
-# define uInt z_uInt
-# define uLong z_uLong
-# define Bytef z_Bytef
-# define charf z_charf
-# define intf z_intf
-# define uIntf z_uIntf
-# define uLongf z_uLongf
-# define voidpf z_voidpf
-# define voidp z_voidp
-#endif
-
-#if defined(__MSDOS__) && !defined(MSDOS)
-# define MSDOS
-#endif
-#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
-# define OS2
-#endif
-#if defined(_WINDOWS) && !defined(WINDOWS)
-# define WINDOWS
-#endif
-#if defined(_WIN32) || defined(_WIN32_WCE) || defined(__WIN32__)
-# ifndef WIN32
-# define WIN32
-# endif
-#endif
-#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
-# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
-# ifndef SYS16BIT
-# define SYS16BIT
-# endif
-# endif
-#endif
-
-/*
- * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
- * than 64k bytes at a time (needed on systems with 16-bit int).
- */
-#ifdef SYS16BIT
-# define MAXSEG_64K
-#endif
-#ifdef MSDOS
-# define UNALIGNED_OK
-#endif
-
-#ifdef __STDC_VERSION__
-# ifndef STDC
-# define STDC
-# endif
-# if __STDC_VERSION__ >= 199901L
-# ifndef STDC99
-# define STDC99
-# endif
-# endif
-#endif
-#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
-# define STDC
-#endif
-#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
-# define STDC
-#endif
-#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
-# define STDC
-#endif
-#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
-# define STDC
-#endif
-
-#if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */
-# define STDC
-#endif
-
-#ifndef STDC
-# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
-# define const /* note: need a more gentle solution here */
-# endif
-#endif
-
-/* Some Mac compilers merge all .h files incorrectly: */
-#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
-# define NO_DUMMY_DECL
-#endif
-
-/* Maximum value for memLevel in deflateInit2 */
-#ifndef MAX_MEM_LEVEL
-# ifdef MAXSEG_64K
-# define MAX_MEM_LEVEL 8
-# else
-# define MAX_MEM_LEVEL 9
-# endif
-#endif
-
-/* Maximum value for windowBits in deflateInit2 and inflateInit2.
- * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
- * created by gzip. (Files created by minigzip can still be extracted by
- * gzip.)
- */
-#ifndef MAX_WBITS
-# define MAX_WBITS 15 /* 32K LZ77 window */
-#endif
-
-/* The memory requirements for deflate are (in bytes):
- (1 << (windowBits+2)) + (1 << (memLevel+9))
- that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
- plus a few kilobytes for small objects. For example, if you want to reduce
- the default memory requirements from 256K to 128K, compile with
- make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
- Of course this will generally degrade compression (there's no free lunch).
-
- The memory requirements for inflate are (in bytes) 1 << windowBits
- that is, 32K for windowBits=15 (default value) plus a few kilobytes
- for small objects.
-*/
-
- /* Type declarations */
-
-#ifndef OF /* function prototypes */
-# ifdef STDC
-# define OF(args) args
-# else
-# define OF(args) ()
-# endif
-#endif
-
-/* The following definitions for FAR are needed only for MSDOS mixed
- * model programming (small or medium model with some far allocations).
- * This was tested only with MSC; for other MSDOS compilers you may have
- * to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
- * just define FAR to be empty.
- */
-#ifdef SYS16BIT
-# if defined(M_I86SM) || defined(M_I86MM)
- /* MSC small or medium model */
-# define SMALL_MEDIUM
-# ifdef _MSC_VER
-# define FAR _far
-# else
-# define FAR far
-# endif
-# endif
-# if (defined(__SMALL__) || defined(__MEDIUM__))
- /* Turbo C small or medium model */
-# define SMALL_MEDIUM
-# ifdef __BORLANDC__
-# define FAR _far
-# else
-# define FAR far
-# endif
-# endif
-#endif
-
-#if defined(WINDOWS) || defined(WIN32)
- /* If building or using zlib as a DLL, define ZLIB_DLL.
- * This is not mandatory, but it offers a little performance increase.
- */
-# ifdef ZLIB_DLL
-# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
-# ifdef ZLIB_INTERNAL
-# define ZEXTERN extern __declspec(dllexport)
-# else
-# define ZEXTERN extern __declspec(dllimport)
-# endif
-# endif
-# endif /* ZLIB_DLL */
- /* If building or using zlib with the WINAPI/WINAPIV calling convention,
- * define ZLIB_WINAPI.
- * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
- */
-# ifdef ZLIB_WINAPI
-# ifdef FAR
-# undef FAR
-# endif
-# include <windows.h>
- /* No need for _export, use ZLIB.DEF instead. */
- /* For complete Windows compatibility, use WINAPI, not __stdcall. */
-# define ZEXPORT WINAPI
-# ifdef WIN32
-# define ZEXPORTVA WINAPIV
-# else
-# define ZEXPORTVA FAR CDECL
-# endif
-# endif
-#endif
-
-#if defined (__BEOS__)
-# ifdef ZLIB_DLL
-# ifdef ZLIB_INTERNAL
-# define ZEXPORT __declspec(dllexport)
-# define ZEXPORTVA __declspec(dllexport)
-# else
-# define ZEXPORT __declspec(dllimport)
-# define ZEXPORTVA __declspec(dllimport)
-# endif
-# endif
-#endif
-
-#ifndef ZEXTERN
-# define ZEXTERN extern
-#endif
-#ifndef ZEXPORT
-# define ZEXPORT
-#endif
-#ifndef ZEXPORTVA
-# define ZEXPORTVA
-#endif
-
-#ifndef FAR
-# define FAR
-#endif
-
-#if !defined(__MACTYPES__)
-typedef unsigned char Byte; /* 8 bits */
-#endif
-typedef unsigned int uInt; /* 16 bits or more */
-typedef unsigned long uLong; /* 32 bits or more */
-
-#ifdef SMALL_MEDIUM
- /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
-# define Bytef Byte FAR
-#else
- typedef Byte FAR Bytef;
-#endif
-typedef char FAR charf;
-typedef int FAR intf;
-typedef uInt FAR uIntf;
-typedef uLong FAR uLongf;
-
-#ifdef STDC
- typedef void const *voidpc;
- typedef void FAR *voidpf;
- typedef void *voidp;
-#else
- typedef Byte const *voidpc;
- typedef Byte FAR *voidpf;
- typedef Byte *voidp;
-#endif
-
-#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */
-# include <sys/types.h> /* for off_t */
-# include <unistd.h> /* for SEEK_* and off_t */
-# ifdef VMS
-# include <unixio.h> /* for off_t */
-# endif
-# define z_off_t off_t
-#endif
-#ifndef SEEK_SET
-# define SEEK_SET 0 /* Seek from beginning of file. */
-# define SEEK_CUR 1 /* Seek from current position. */
-# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
-#endif
-#ifndef z_off_t
-# define z_off_t long
-#endif
-
-#if defined(__OS400__)
-# define NO_vsnprintf
-#endif
-
-#if defined(__MVS__)
-# define NO_vsnprintf
-# ifdef FAR
-# undef FAR
-# endif
-#endif
-
-/* MVS linker does not support external names larger than 8 bytes */
-#if defined(__MVS__)
-# pragma map(deflateInit_,"DEIN")
-# pragma map(deflateInit2_,"DEIN2")
-# pragma map(deflateEnd,"DEEND")
-# pragma map(deflateBound,"DEBND")
-# pragma map(inflateInit_,"ININ")
-# pragma map(inflateInit2_,"ININ2")
-# pragma map(inflateEnd,"INEND")
-# pragma map(inflateSync,"INSY")
-# pragma map(inflateSetDictionary,"INSEDI")
-# pragma map(compressBound,"CMBND")
-# pragma map(inflate_table,"INTABL")
-# pragma map(inflate_fast,"INFA")
-# pragma map(inflate_copyright,"INCOPY")
-#endif
-
-#endif /* ZCONF_H */
+++ /dev/null
-/* zlib.h -- interface of the 'zlib' general purpose compression library
- version 1.2.3, July 18th, 2005
-
- Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
-
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
-
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- 3. This notice may not be removed or altered from any source distribution.
-
- Jean-loup Gailly Mark Adler
- jloup@gzip.org madler@alumni.caltech.edu
-
-
- The data format used by the zlib library is described by RFCs (Request for
- Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
- (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
-*/
-
-#ifndef ZLIB_H
-#define ZLIB_H
-
-#include "zconf.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define ZLIB_VERSION "1.2.3"
-#define ZLIB_VERNUM 0x1230
-
-/*
- The 'zlib' compression library provides in-memory compression and
- decompression functions, including integrity checks of the uncompressed
- data. This version of the library supports only one compression method
- (deflation) but other algorithms will be added later and will have the same
- stream interface.
-
- Compression can be done in a single step if the buffers are large
- enough (for example if an input file is mmap'ed), or can be done by
- repeated calls of the compression function. In the latter case, the
- application must provide more input and/or consume the output
- (providing more output space) before each call.
-
- The compressed data format used by default by the in-memory functions is
- the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
- around a deflate stream, which is itself documented in RFC 1951.
-
- The library also supports reading and writing files in gzip (.gz) format
- with an interface similar to that of stdio using the functions that start
- with "gz". The gzip format is different from the zlib format. gzip is a
- gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
-
- This library can optionally read and write gzip streams in memory as well.
-
- The zlib format was designed to be compact and fast for use in memory
- and on communications channels. The gzip format was designed for single-
- file compression on file systems, has a larger header than zlib to maintain
- directory information, and uses a different, slower check method than zlib.
-
- The library does not install any signal handler. The decoder checks
- the consistency of the compressed data, so the library should never
- crash even in case of corrupted input.
-*/
-
-typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
-typedef void (*free_func) OF((voidpf opaque, voidpf address));
-
-struct internal_state;
-
-typedef struct z_stream_s {
- Bytef *next_in; /* next input byte */
- uInt avail_in; /* number of bytes available at next_in */
- uLong total_in; /* total nb of input bytes read so far */
-
- Bytef *next_out; /* next output byte should be put there */
- uInt avail_out; /* remaining free space at next_out */
- uLong total_out; /* total nb of bytes output so far */
-
- char *msg; /* last error message, NULL if no error */
- struct internal_state FAR *state; /* not visible by applications */
-
- alloc_func zalloc; /* used to allocate the internal state */
- free_func zfree; /* used to free the internal state */
- voidpf opaque; /* private data object passed to zalloc and zfree */
-
- int data_type; /* best guess about the data type: binary or text */
- uLong adler; /* adler32 value of the uncompressed data */
- uLong reserved; /* reserved for future use */
-} z_stream;
-
-typedef z_stream FAR *z_streamp;
-
-/*
- gzip header information passed to and from zlib routines. See RFC 1952
- for more details on the meanings of these fields.
-*/
-typedef struct gz_header_s {
- int text; /* true if compressed data believed to be text */
- uLong time; /* modification time */
- int xflags; /* extra flags (not used when writing a gzip file) */
- int os; /* operating system */
- Bytef *extra; /* pointer to extra field or Z_NULL if none */
- uInt extra_len; /* extra field length (valid if extra != Z_NULL) */
- uInt extra_max; /* space at extra (only when reading header) */
- Bytef *name; /* pointer to zero-terminated file name or Z_NULL */
- uInt name_max; /* space at name (only when reading header) */
- Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */
- uInt comm_max; /* space at comment (only when reading header) */
- int hcrc; /* true if there was or will be a header crc */
- int done; /* true when done reading gzip header (not used
- when writing a gzip file) */
-} gz_header;
-
-typedef gz_header FAR *gz_headerp;
-
-/*
- The application must update next_in and avail_in when avail_in has
- dropped to zero. It must update next_out and avail_out when avail_out
- has dropped to zero. The application must initialize zalloc, zfree and
- opaque before calling the init function. All other fields are set by the
- compression library and must not be updated by the application.
-
- The opaque value provided by the application will be passed as the first
- parameter for calls of zalloc and zfree. This can be useful for custom
- memory management. The compression library attaches no meaning to the
- opaque value.
-
- zalloc must return Z_NULL if there is not enough memory for the object.
- If zlib is used in a multi-threaded application, zalloc and zfree must be
- thread safe.
-
- On 16-bit systems, the functions zalloc and zfree must be able to allocate
- exactly 65536 bytes, but will not be required to allocate more than this
- if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
- pointers returned by zalloc for objects of exactly 65536 bytes *must*
- have their offset normalized to zero. The default allocation function
- provided by this library ensures this (see zutil.c). To reduce memory
- requirements and avoid any allocation of 64K objects, at the expense of
- compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
-
- The fields total_in and total_out can be used for statistics or
- progress reports. After compression, total_in holds the total size of
- the uncompressed data and may be saved for use in the decompressor
- (particularly if the decompressor wants to decompress everything in
- a single step).
-*/
-
- /* constants */
-
-#define Z_NO_FLUSH 0
-#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
-#define Z_SYNC_FLUSH 2
-#define Z_FULL_FLUSH 3
-#define Z_FINISH 4
-#define Z_BLOCK 5
-/* Allowed flush values; see deflate() and inflate() below for details */
-
-#define Z_OK 0
-#define Z_STREAM_END 1
-#define Z_NEED_DICT 2
-#define Z_ERRNO (-1)
-#define Z_STREAM_ERROR (-2)
-#define Z_DATA_ERROR (-3)
-#define Z_MEM_ERROR (-4)
-#define Z_BUF_ERROR (-5)
-#define Z_VERSION_ERROR (-6)
-/* Return codes for the compression/decompression functions. Negative
- * values are errors, positive values are used for special but normal events.
- */
-
-#define Z_NO_COMPRESSION 0
-#define Z_BEST_SPEED 1
-#define Z_BEST_COMPRESSION 9
-#define Z_DEFAULT_COMPRESSION (-1)
-/* compression levels */
-
-#define Z_FILTERED 1
-#define Z_HUFFMAN_ONLY 2
-#define Z_RLE 3
-#define Z_FIXED 4
-#define Z_DEFAULT_STRATEGY 0
-/* compression strategy; see deflateInit2() below for details */
-
-#define Z_BINARY 0
-#define Z_TEXT 1
-#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
-#define Z_UNKNOWN 2
-/* Possible values of the data_type field (though see inflate()) */
-
-#define Z_DEFLATED 8
-/* The deflate compression method (the only one supported in this version) */
-
-#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
-
-#define zlib_version zlibVersion()
-/* for compatibility with versions < 1.0.2 */
-
- /* basic functions */
-
-ZEXTERN const char * ZEXPORT zlibVersion OF((void));
-/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
- If the first character differs, the library code actually used is
- not compatible with the zlib.h header file used by the application.
- This check is automatically made by deflateInit and inflateInit.
- */
-
-/*
-ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
-
- Initializes the internal stream state for compression. The fields
- zalloc, zfree and opaque must be initialized before by the caller.
- If zalloc and zfree are set to Z_NULL, deflateInit updates them to
- use default allocation functions.
-
- The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
- 1 gives best speed, 9 gives best compression, 0 gives no compression at
- all (the input data is simply copied a block at a time).
- Z_DEFAULT_COMPRESSION requests a default compromise between speed and
- compression (currently equivalent to level 6).
-
- deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
- enough memory, Z_STREAM_ERROR if level is not a valid compression level,
- Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
- with the version assumed by the caller (ZLIB_VERSION).
- msg is set to null if there is no error message. deflateInit does not
- perform any compression: this will be done by deflate().
-*/
-
-
-ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
-/*
- deflate compresses as much data as possible, and stops when the input
- buffer becomes empty or the output buffer becomes full. It may introduce some
- output latency (reading input without producing any output) except when
- forced to flush.
-
- The detailed semantics are as follows. deflate performs one or both of the
- following actions:
-
- - Compress more input starting at next_in and update next_in and avail_in
- accordingly. If not all input can be processed (because there is not
- enough room in the output buffer), next_in and avail_in are updated and
- processing will resume at this point for the next call of deflate().
-
- - Provide more output starting at next_out and update next_out and avail_out
- accordingly. This action is forced if the parameter flush is non zero.
- Forcing flush frequently degrades the compression ratio, so this parameter
- should be set only when necessary (in interactive applications).
- Some output may be provided even if flush is not set.
-
- Before the call of deflate(), the application should ensure that at least
- one of the actions is possible, by providing more input and/or consuming
- more output, and updating avail_in or avail_out accordingly; avail_out
- should never be zero before the call. The application can consume the
- compressed output when it wants, for example when the output buffer is full
- (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
- and with zero avail_out, it must be called again after making room in the
- output buffer because there might be more output pending.
-
- Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
- decide how much data to accumualte before producing output, in order to
- maximize compression.
-
- If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
- flushed to the output buffer and the output is aligned on a byte boundary, so
- that the decompressor can get all input data available so far. (In particular
- avail_in is zero after the call if enough output space has been provided
- before the call.) Flushing may degrade compression for some compression
- algorithms and so it should be used only when necessary.
-
- If flush is set to Z_FULL_FLUSH, all output is flushed as with
- Z_SYNC_FLUSH, and the compression state is reset so that decompression can
- restart from this point if previous compressed data has been damaged or if
- random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
- compression.
-
- If deflate returns with avail_out == 0, this function must be called again
- with the same value of the flush parameter and more output space (updated
- avail_out), until the flush is complete (deflate returns with non-zero
- avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
- avail_out is greater than six to avoid repeated flush markers due to
- avail_out == 0 on return.
-
- If the parameter flush is set to Z_FINISH, pending input is processed,
- pending output is flushed and deflate returns with Z_STREAM_END if there
- was enough output space; if deflate returns with Z_OK, this function must be
- called again with Z_FINISH and more output space (updated avail_out) but no
- more input data, until it returns with Z_STREAM_END or an error. After
- deflate has returned Z_STREAM_END, the only possible operations on the
- stream are deflateReset or deflateEnd.
-
- Z_FINISH can be used immediately after deflateInit if all the compression
- is to be done in a single step. In this case, avail_out must be at least
- the value returned by deflateBound (see below). If deflate does not return
- Z_STREAM_END, then it must be called again as described above.
-
- deflate() sets strm->adler to the adler32 checksum of all input read
- so far (that is, total_in bytes).
-
- deflate() may update strm->data_type if it can make a good guess about
- the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
- binary. This field is only for information purposes and does not affect
- the compression algorithm in any manner.
-
- deflate() returns Z_OK if some progress has been made (more input
- processed or more output produced), Z_STREAM_END if all input has been
- consumed and all output has been produced (only when flush is set to
- Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
- if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
- (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
- fatal, and deflate() can be called again with more input and more output
- space to continue compressing.
-*/
-
-
-ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
-/*
- All dynamically allocated data structures for this stream are freed.
- This function discards any unprocessed input and does not flush any
- pending output.
-
- deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
- stream state was inconsistent, Z_DATA_ERROR if the stream was freed
- prematurely (some input or output was discarded). In the error case,
- msg may be set but then points to a static string (which must not be
- deallocated).
-*/
-
-
-/*
-ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
-
- Initializes the internal stream state for decompression. The fields
- next_in, avail_in, zalloc, zfree and opaque must be initialized before by
- the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
- value depends on the compression method), inflateInit determines the
- compression method from the zlib header and allocates all data structures
- accordingly; otherwise the allocation will be deferred to the first call of
- inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
- use default allocation functions.
-
- inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
- memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
- version assumed by the caller. msg is set to null if there is no error
- message. inflateInit does not perform any decompression apart from reading
- the zlib header if present: this will be done by inflate(). (So next_in and
- avail_in may be modified, but next_out and avail_out are unchanged.)
-*/
-
-
-ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
-/*
- inflate decompresses as much data as possible, and stops when the input
- buffer becomes empty or the output buffer becomes full. It may introduce
- some output latency (reading input without producing any output) except when
- forced to flush.
-
- The detailed semantics are as follows. inflate performs one or both of the
- following actions:
-
- - Decompress more input starting at next_in and update next_in and avail_in
- accordingly. If not all input can be processed (because there is not
- enough room in the output buffer), next_in is updated and processing
- will resume at this point for the next call of inflate().
-
- - Provide more output starting at next_out and update next_out and avail_out
- accordingly. inflate() provides as much output as possible, until there
- is no more input data or no more space in the output buffer (see below
- about the flush parameter).
-
- Before the call of inflate(), the application should ensure that at least
- one of the actions is possible, by providing more input and/or consuming
- more output, and updating the next_* and avail_* values accordingly.
- The application can consume the uncompressed output when it wants, for
- example when the output buffer is full (avail_out == 0), or after each
- call of inflate(). If inflate returns Z_OK and with zero avail_out, it
- must be called again after making room in the output buffer because there
- might be more output pending.
-
- The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
- Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
- output as possible to the output buffer. Z_BLOCK requests that inflate() stop
- if and when it gets to the next deflate block boundary. When decoding the
- zlib or gzip format, this will cause inflate() to return immediately after
- the header and before the first block. When doing a raw inflate, inflate()
- will go ahead and process the first block, and will return when it gets to
- the end of that block, or when it runs out of data.
-
- The Z_BLOCK option assists in appending to or combining deflate streams.
- Also to assist in this, on return inflate() will set strm->data_type to the
- number of unused bits in the last byte taken from strm->next_in, plus 64
- if inflate() is currently decoding the last block in the deflate stream,
- plus 128 if inflate() returned immediately after decoding an end-of-block
- code or decoding the complete header up to just before the first byte of the
- deflate stream. The end-of-block will not be indicated until all of the
- uncompressed data from that block has been written to strm->next_out. The
- number of unused bits may in general be greater than seven, except when
- bit 7 of data_type is set, in which case the number of unused bits will be
- less than eight.
-
- inflate() should normally be called until it returns Z_STREAM_END or an
- error. However if all decompression is to be performed in a single step
- (a single call of inflate), the parameter flush should be set to
- Z_FINISH. In this case all pending input is processed and all pending
- output is flushed; avail_out must be large enough to hold all the
- uncompressed data. (The size of the uncompressed data may have been saved
- by the compressor for this purpose.) The next operation on this stream must
- be inflateEnd to deallocate the decompression state. The use of Z_FINISH
- is never required, but can be used to inform inflate that a faster approach
- may be used for the single inflate() call.
-
- In this implementation, inflate() always flushes as much output as
- possible to the output buffer, and always uses the faster approach on the
- first call. So the only effect of the flush parameter in this implementation
- is on the return value of inflate(), as noted below, or when it returns early
- because Z_BLOCK is used.
-
- If a preset dictionary is needed after this call (see inflateSetDictionary
- below), inflate sets strm->adler to the adler32 checksum of the dictionary
- chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
- strm->adler to the adler32 checksum of all output produced so far (that is,
- total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
- below. At the end of the stream, inflate() checks that its computed adler32
- checksum is equal to that saved by the compressor and returns Z_STREAM_END
- only if the checksum is correct.
-
- inflate() will decompress and check either zlib-wrapped or gzip-wrapped
- deflate data. The header type is detected automatically. Any information
- contained in the gzip header is not retained, so applications that need that
- information should instead use raw inflate, see inflateInit2() below, or
- inflateBack() and perform their own processing of the gzip header and
- trailer.
-
- inflate() returns Z_OK if some progress has been made (more input processed
- or more output produced), Z_STREAM_END if the end of the compressed data has
- been reached and all uncompressed output has been produced, Z_NEED_DICT if a
- preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
- corrupted (input stream not conforming to the zlib format or incorrect check
- value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
- if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
- Z_BUF_ERROR if no progress is possible or if there was not enough room in the
- output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
- inflate() can be called again with more input and more output space to
- continue decompressing. If Z_DATA_ERROR is returned, the application may then
- call inflateSync() to look for a good compression block if a partial recovery
- of the data is desired.
-*/
-
-
-ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
-/*
- All dynamically allocated data structures for this stream are freed.
- This function discards any unprocessed input and does not flush any
- pending output.
-
- inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
- was inconsistent. In the error case, msg may be set but then points to a
- static string (which must not be deallocated).
-*/
-
- /* Advanced functions */
-
-/*
- The following functions are needed only in some special applications.
-*/
-
-/*
-ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
- int level,
- int method,
- int windowBits,
- int memLevel,
- int strategy));
-
- This is another version of deflateInit with more compression options. The
- fields next_in, zalloc, zfree and opaque must be initialized before by
- the caller.
-
- The method parameter is the compression method. It must be Z_DEFLATED in
- this version of the library.
-
- The windowBits parameter is the base two logarithm of the window size
- (the size of the history buffer). It should be in the range 8..15 for this
- version of the library. Larger values of this parameter result in better
- compression at the expense of memory usage. The default value is 15 if
- deflateInit is used instead.
-
- windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
- determines the window size. deflate() will then generate raw deflate data
- with no zlib header or trailer, and will not compute an adler32 check value.
-
- windowBits can also be greater than 15 for optional gzip encoding. Add
- 16 to windowBits to write a simple gzip header and trailer around the
- compressed data instead of a zlib wrapper. The gzip header will have no
- file name, no extra data, no comment, no modification time (set to zero),
- no header crc, and the operating system will be set to 255 (unknown). If a
- gzip stream is being written, strm->adler is a crc32 instead of an adler32.
-
- The memLevel parameter specifies how much memory should be allocated
- for the internal compression state. memLevel=1 uses minimum memory but
- is slow and reduces compression ratio; memLevel=9 uses maximum memory
- for optimal speed. The default value is 8. See zconf.h for total memory
- usage as a function of windowBits and memLevel.
-
- The strategy parameter is used to tune the compression algorithm. Use the
- value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
- filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no
- string match), or Z_RLE to limit match distances to one (run-length
- encoding). Filtered data consists mostly of small values with a somewhat
- random distribution. In this case, the compression algorithm is tuned to
- compress them better. The effect of Z_FILTERED is to force more Huffman
- coding and less string matching; it is somewhat intermediate between
- Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
- Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
- parameter only affects the compression ratio but not the correctness of the
- compressed output even if it is not set appropriately. Z_FIXED prevents the
- use of dynamic Huffman codes, allowing for a simpler decoder for special
- applications.
-
- deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
- memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
- method). msg is set to null if there is no error message. deflateInit2 does
- not perform any compression: this will be done by deflate().
-*/
-
-ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
- const Bytef *dictionary,
- uInt dictLength));
-/*
- Initializes the compression dictionary from the given byte sequence
- without producing any compressed output. This function must be called
- immediately after deflateInit, deflateInit2 or deflateReset, before any
- call of deflate. The compressor and decompressor must use exactly the same
- dictionary (see inflateSetDictionary).
-
- The dictionary should consist of strings (byte sequences) that are likely
- to be encountered later in the data to be compressed, with the most commonly
- used strings preferably put towards the end of the dictionary. Using a
- dictionary is most useful when the data to be compressed is short and can be
- predicted with good accuracy; the data can then be compressed better than
- with the default empty dictionary.
-
- Depending on the size of the compression data structures selected by
- deflateInit or deflateInit2, a part of the dictionary may in effect be
- discarded, for example if the dictionary is larger than the window size in
- deflate or deflate2. Thus the strings most likely to be useful should be
- put at the end of the dictionary, not at the front. In addition, the
- current implementation of deflate will use at most the window size minus
- 262 bytes of the provided dictionary.
-
- Upon return of this function, strm->adler is set to the adler32 value
- of the dictionary; the decompressor may later use this value to determine
- which dictionary has been used by the compressor. (The adler32 value
- applies to the whole dictionary even if only a subset of the dictionary is
- actually used by the compressor.) If a raw deflate was requested, then the
- adler32 value is not computed and strm->adler is not set.
-
- deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
- parameter is invalid (such as NULL dictionary) or the stream state is
- inconsistent (for example if deflate has already been called for this stream
- or if the compression method is bsort). deflateSetDictionary does not
- perform any compression: this will be done by deflate().
-*/
-
-ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
- z_streamp source));
-/*
- Sets the destination stream as a complete copy of the source stream.
-
- This function can be useful when several compression strategies will be
- tried, for example when there are several ways of pre-processing the input
- data with a filter. The streams that will be discarded should then be freed
- by calling deflateEnd. Note that deflateCopy duplicates the internal
- compression state which can be quite large, so this strategy is slow and
- can consume lots of memory.
-
- deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
- enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
- (such as zalloc being NULL). msg is left unchanged in both source and
- destination.
-*/
-
-ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
-/*
- This function is equivalent to deflateEnd followed by deflateInit,
- but does not free and reallocate all the internal compression state.
- The stream will keep the same compression level and any other attributes
- that may have been set by deflateInit2.
-
- deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
- stream state was inconsistent (such as zalloc or state being NULL).
-*/
-
-ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
- int level,
- int strategy));
-/*
- Dynamically update the compression level and compression strategy. The
- interpretation of level and strategy is as in deflateInit2. This can be
- used to switch between compression and straight copy of the input data, or
- to switch to a different kind of input data requiring a different
- strategy. If the compression level is changed, the input available so far
- is compressed with the old level (and may be flushed); the new level will
- take effect only at the next call of deflate().
-
- Before the call of deflateParams, the stream state must be set as for
- a call of deflate(), since the currently available input may have to
- be compressed and flushed. In particular, strm->avail_out must be non-zero.
-
- deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
- stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
- if strm->avail_out was zero.
-*/
-
-ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
- int good_length,
- int max_lazy,
- int nice_length,
- int max_chain));
-/*
- Fine tune deflate's internal compression parameters. This should only be
- used by someone who understands the algorithm used by zlib's deflate for
- searching for the best matching string, and even then only by the most
- fanatic optimizer trying to squeeze out the last compressed bit for their
- specific input data. Read the deflate.c source code for the meaning of the
- max_lazy, good_length, nice_length, and max_chain parameters.
-
- deflateTune() can be called after deflateInit() or deflateInit2(), and
- returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream.
- */
-
-ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
- uLong sourceLen));
-/*
- deflateBound() returns an upper bound on the compressed size after
- deflation of sourceLen bytes. It must be called after deflateInit()
- or deflateInit2(). This would be used to allocate an output buffer
- for deflation in a single pass, and so would be called before deflate().
-*/
-
-ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
- int bits,
- int value));
-/*
- deflatePrime() inserts bits in the deflate output stream. The intent
- is that this function is used to start off the deflate output with the
- bits leftover from a previous deflate stream when appending to it. As such,
- this function can only be used for raw deflate, and must be used before the
- first deflate() call after a deflateInit2() or deflateReset(). bits must be
- less than or equal to 16, and that many of the least significant bits of
- value will be inserted in the output.
-
- deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
- stream state was inconsistent.
-*/
-
-ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
- gz_headerp head));
-/*
- deflateSetHeader() provides gzip header information for when a gzip
- stream is requested by deflateInit2(). deflateSetHeader() may be called
- after deflateInit2() or deflateReset() and before the first call of
- deflate(). The text, time, os, extra field, name, and comment information
- in the provided gz_header structure are written to the gzip header (xflag is
- ignored -- the extra flags are set according to the compression level). The
- caller must assure that, if not Z_NULL, name and comment are terminated with
- a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
- available there. If hcrc is true, a gzip header crc is included. Note that
- the current versions of the command-line version of gzip (up through version
- 1.3.x) do not support header crc's, and will report that it is a "multi-part
- gzip file" and give up.
-
- If deflateSetHeader is not used, the default gzip header has text false,
- the time set to zero, and os set to 255, with no extra, name, or comment
- fields. The gzip header is returned to the default state by deflateReset().
-
- deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
- stream state was inconsistent.
-*/
-
-/*
-ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
- int windowBits));
-
- This is another version of inflateInit with an extra parameter. The
- fields next_in, avail_in, zalloc, zfree and opaque must be initialized
- before by the caller.
-
- The windowBits parameter is the base two logarithm of the maximum window
- size (the size of the history buffer). It should be in the range 8..15 for
- this version of the library. The default value is 15 if inflateInit is used
- instead. windowBits must be greater than or equal to the windowBits value
- provided to deflateInit2() while compressing, or it must be equal to 15 if
- deflateInit2() was not used. If a compressed stream with a larger window
- size is given as input, inflate() will return with the error code
- Z_DATA_ERROR instead of trying to allocate a larger window.
-
- windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
- determines the window size. inflate() will then process raw deflate data,
- not looking for a zlib or gzip header, not generating a check value, and not
- looking for any check values for comparison at the end of the stream. This
- is for use with other formats that use the deflate compressed data format
- such as zip. Those formats provide their own check values. If a custom
- format is developed using the raw deflate format for compressed data, it is
- recommended that a check value such as an adler32 or a crc32 be applied to
- the uncompressed data as is done in the zlib, gzip, and zip formats. For
- most applications, the zlib format should be used as is. Note that comments
- above on the use in deflateInit2() applies to the magnitude of windowBits.
-
- windowBits can also be greater than 15 for optional gzip decoding. Add
- 32 to windowBits to enable zlib and gzip decoding with automatic header
- detection, or add 16 to decode only the gzip format (the zlib format will
- return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is
- a crc32 instead of an adler32.
-
- inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
- memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg
- is set to null if there is no error message. inflateInit2 does not perform
- any decompression apart from reading the zlib header if present: this will
- be done by inflate(). (So next_in and avail_in may be modified, but next_out
- and avail_out are unchanged.)
-*/
-
-ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
- const Bytef *dictionary,
- uInt dictLength));
-/*
- Initializes the decompression dictionary from the given uncompressed byte
- sequence. This function must be called immediately after a call of inflate,
- if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
- can be determined from the adler32 value returned by that call of inflate.
- The compressor and decompressor must use exactly the same dictionary (see
- deflateSetDictionary). For raw inflate, this function can be called
- immediately after inflateInit2() or inflateReset() and before any call of
- inflate() to set the dictionary. The application must insure that the
- dictionary that was used for compression is provided.
-
- inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
- parameter is invalid (such as NULL dictionary) or the stream state is
- inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
- expected one (incorrect adler32 value). inflateSetDictionary does not
- perform any decompression: this will be done by subsequent calls of
- inflate().
-*/
-
-ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
-/*
- Skips invalid compressed data until a full flush point (see above the
- description of deflate with Z_FULL_FLUSH) can be found, or until all
- available input is skipped. No output is provided.
-
- inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
- if no more input was provided, Z_DATA_ERROR if no flush point has been found,
- or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
- case, the application may save the current current value of total_in which
- indicates where valid compressed data was found. In the error case, the
- application may repeatedly call inflateSync, providing more input each time,
- until success or end of the input data.
-*/
-
-ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
- z_streamp source));
-/*
- Sets the destination stream as a complete copy of the source stream.
-
- This function can be useful when randomly accessing a large stream. The
- first pass through the stream can periodically record the inflate state,
- allowing restarting inflate at those points when randomly accessing the
- stream.
-
- inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
- enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
- (such as zalloc being NULL). msg is left unchanged in both source and
- destination.
-*/
-
-ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
-/*
- This function is equivalent to inflateEnd followed by inflateInit,
- but does not free and reallocate all the internal decompression state.
- The stream will keep attributes that may have been set by inflateInit2.
-
- inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
- stream state was inconsistent (such as zalloc or state being NULL).
-*/
-
-ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
- int bits,
- int value));
-/*
- This function inserts bits in the inflate input stream. The intent is
- that this function is used to start inflating at a bit position in the
- middle of a byte. The provided bits will be used before any bytes are used
- from next_in. This function should only be used with raw inflate, and
- should be used before the first inflate() call after inflateInit2() or
- inflateReset(). bits must be less than or equal to 16, and that many of the
- least significant bits of value will be inserted in the input.
-
- inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
- stream state was inconsistent.
-*/
-
-ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
- gz_headerp head));
-/*
- inflateGetHeader() requests that gzip header information be stored in the
- provided gz_header structure. inflateGetHeader() may be called after
- inflateInit2() or inflateReset(), and before the first call of inflate().
- As inflate() processes the gzip stream, head->done is zero until the header
- is completed, at which time head->done is set to one. If a zlib stream is
- being decoded, then head->done is set to -1 to indicate that there will be
- no gzip header information forthcoming. Note that Z_BLOCK can be used to
- force inflate() to return immediately after header processing is complete
- and before any actual data is decompressed.
-
- The text, time, xflags, and os fields are filled in with the gzip header
- contents. hcrc is set to true if there is a header CRC. (The header CRC
- was valid if done is set to one.) If extra is not Z_NULL, then extra_max
- contains the maximum number of bytes to write to extra. Once done is true,
- extra_len contains the actual extra field length, and extra contains the
- extra field, or that field truncated if extra_max is less than extra_len.
- If name is not Z_NULL, then up to name_max characters are written there,
- terminated with a zero unless the length is greater than name_max. If
- comment is not Z_NULL, then up to comm_max characters are written there,
- terminated with a zero unless the length is greater than comm_max. When
- any of extra, name, or comment are not Z_NULL and the respective field is
- not present in the header, then that field is set to Z_NULL to signal its
- absence. This allows the use of deflateSetHeader() with the returned
- structure to duplicate the header. However if those fields are set to
- allocated memory, then the application will need to save those pointers
- elsewhere so that they can be eventually freed.
-
- If inflateGetHeader is not used, then the header information is simply
- discarded. The header is always checked for validity, including the header
- CRC if present. inflateReset() will reset the process to discard the header
- information. The application would need to call inflateGetHeader() again to
- retrieve the header from the next gzip stream.
-
- inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
- stream state was inconsistent.
-*/
-
-/*
-ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
- unsigned char FAR *window));
-
- Initialize the internal stream state for decompression using inflateBack()
- calls. The fields zalloc, zfree and opaque in strm must be initialized
- before the call. If zalloc and zfree are Z_NULL, then the default library-
- derived memory allocation routines are used. windowBits is the base two
- logarithm of the window size, in the range 8..15. window is a caller
- supplied buffer of that size. Except for special applications where it is
- assured that deflate was used with small window sizes, windowBits must be 15
- and a 32K byte window must be supplied to be able to decompress general
- deflate streams.
-
- See inflateBack() for the usage of these routines.
-
- inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
- the paramaters are invalid, Z_MEM_ERROR if the internal state could not
- be allocated, or Z_VERSION_ERROR if the version of the library does not
- match the version of the header file.
-*/
-
-typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
-typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
-
-ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
- in_func in, void FAR *in_desc,
- out_func out, void FAR *out_desc));
-/*
- inflateBack() does a raw inflate with a single call using a call-back
- interface for input and output. This is more efficient than inflate() for
- file i/o applications in that it avoids copying between the output and the
- sliding window by simply making the window itself the output buffer. This
- function trusts the application to not change the output buffer passed by
- the output function, at least until inflateBack() returns.
-
- inflateBackInit() must be called first to allocate the internal state
- and to initialize the state with the user-provided window buffer.
- inflateBack() may then be used multiple times to inflate a complete, raw
- deflate stream with each call. inflateBackEnd() is then called to free
- the allocated state.
-
- A raw deflate stream is one with no zlib or gzip header or trailer.
- This routine would normally be used in a utility that reads zip or gzip
- files and writes out uncompressed files. The utility would decode the
- header and process the trailer on its own, hence this routine expects
- only the raw deflate stream to decompress. This is different from the
- normal behavior of inflate(), which expects either a zlib or gzip header and
- trailer around the deflate stream.
-
- inflateBack() uses two subroutines supplied by the caller that are then
- called by inflateBack() for input and output. inflateBack() calls those
- routines until it reads a complete deflate stream and writes out all of the
- uncompressed data, or until it encounters an error. The function's
- parameters and return types are defined above in the in_func and out_func
- typedefs. inflateBack() will call in(in_desc, &buf) which should return the
- number of bytes of provided input, and a pointer to that input in buf. If
- there is no input available, in() must return zero--buf is ignored in that
- case--and inflateBack() will return a buffer error. inflateBack() will call
- out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out()
- should return zero on success, or non-zero on failure. If out() returns
- non-zero, inflateBack() will return with an error. Neither in() nor out()
- are permitted to change the contents of the window provided to
- inflateBackInit(), which is also the buffer that out() uses to write from.
- The length written by out() will be at most the window size. Any non-zero
- amount of input may be provided by in().
-
- For convenience, inflateBack() can be provided input on the first call by
- setting strm->next_in and strm->avail_in. If that input is exhausted, then
- in() will be called. Therefore strm->next_in must be initialized before
- calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called
- immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in
- must also be initialized, and then if strm->avail_in is not zero, input will
- initially be taken from strm->next_in[0 .. strm->avail_in - 1].
-
- The in_desc and out_desc parameters of inflateBack() is passed as the
- first parameter of in() and out() respectively when they are called. These
- descriptors can be optionally used to pass any information that the caller-
- supplied in() and out() functions need to do their job.
-
- On return, inflateBack() will set strm->next_in and strm->avail_in to
- pass back any unused input that was provided by the last in() call. The
- return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
- if in() or out() returned an error, Z_DATA_ERROR if there was a format
- error in the deflate stream (in which case strm->msg is set to indicate the
- nature of the error), or Z_STREAM_ERROR if the stream was not properly
- initialized. In the case of Z_BUF_ERROR, an input or output error can be
- distinguished using strm->next_in which will be Z_NULL only if in() returned
- an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to
- out() returning non-zero. (in() will always be called before out(), so
- strm->next_in is assured to be defined if out() returns non-zero.) Note
- that inflateBack() cannot return Z_OK.
-*/
-
-ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
-/*
- All memory allocated by inflateBackInit() is freed.
-
- inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
- state was inconsistent.
-*/
-
-ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
-/* Return flags indicating compile-time options.
-
- Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other:
- 1.0: size of uInt
- 3.2: size of uLong
- 5.4: size of voidpf (pointer)
- 7.6: size of z_off_t
-
- Compiler, assembler, and debug options:
- 8: DEBUG
- 9: ASMV or ASMINF -- use ASM code
- 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
- 11: 0 (reserved)
-
- One-time table building (smaller code, but not thread-safe if true):
- 12: BUILDFIXED -- build static block decoding tables when needed
- 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed
- 14,15: 0 (reserved)
-
- Library content (indicates missing functionality):
- 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking
- deflate code when not needed)
- 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect
- and decode gzip streams (to avoid linking crc code)
- 18-19: 0 (reserved)
-
- Operation variations (changes in library functionality):
- 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate
- 21: FASTEST -- deflate algorithm with only one, lowest compression level
- 22,23: 0 (reserved)
-
- The sprintf variant used by gzprintf (zero is best):
- 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format
- 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure!
- 26: 0 = returns value, 1 = void -- 1 means inferred string length returned
-
- Remainder:
- 27-31: 0 (reserved)
- */
-
-
- /* utility functions */
-
-/*
- The following utility functions are implemented on top of the
- basic stream-oriented functions. To simplify the interface, some
- default options are assumed (compression level and memory usage,
- standard memory allocation functions). The source code of these
- utility functions can easily be modified if you need special options.
-*/
-
-ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
- const Bytef *source, uLong sourceLen));
-/*
- Compresses the source buffer into the destination buffer. sourceLen is
- the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be at least the value returned
- by compressBound(sourceLen). Upon exit, destLen is the actual size of the
- compressed buffer.
- This function can be used to compress a whole file at once if the
- input file is mmap'ed.
- compress returns Z_OK if success, Z_MEM_ERROR if there was not
- enough memory, Z_BUF_ERROR if there was not enough room in the output
- buffer.
-*/
-
-ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
- const Bytef *source, uLong sourceLen,
- int level));
-/*
- Compresses the source buffer into the destination buffer. The level
- parameter has the same meaning as in deflateInit. sourceLen is the byte
- length of the source buffer. Upon entry, destLen is the total size of the
- destination buffer, which must be at least the value returned by
- compressBound(sourceLen). Upon exit, destLen is the actual size of the
- compressed buffer.
-
- compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
- memory, Z_BUF_ERROR if there was not enough room in the output buffer,
- Z_STREAM_ERROR if the level parameter is invalid.
-*/
-
-ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
-/*
- compressBound() returns an upper bound on the compressed size after
- compress() or compress2() on sourceLen bytes. It would be used before
- a compress() or compress2() call to allocate the destination buffer.
-*/
-
-ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
- const Bytef *source, uLong sourceLen));
-/*
- Decompresses the source buffer into the destination buffer. sourceLen is
- the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be large enough to hold the
- entire uncompressed data. (The size of the uncompressed data must have
- been saved previously by the compressor and transmitted to the decompressor
- by some mechanism outside the scope of this compression library.)
- Upon exit, destLen is the actual size of the compressed buffer.
- This function can be used to decompress a whole file at once if the
- input file is mmap'ed.
-
- uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
- enough memory, Z_BUF_ERROR if there was not enough room in the output
- buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
-*/
-
-
-typedef voidp gzFile;
-
-ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
-/*
- Opens a gzip (.gz) file for reading or writing. The mode parameter
- is as in fopen ("rb" or "wb") but can also include a compression level
- ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
- Huffman only compression as in "wb1h", or 'R' for run-length encoding
- as in "wb1R". (See the description of deflateInit2 for more information
- about the strategy parameter.)
-
- gzopen can be used to read a file which is not in gzip format; in this
- case gzread will directly read from the file without decompression.
-
- gzopen returns NULL if the file could not be opened or if there was
- insufficient memory to allocate the (de)compression state; errno
- can be checked to distinguish the two cases (if errno is zero, the
- zlib error is Z_MEM_ERROR). */
-
-ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
-/*
- gzdopen() associates a gzFile with the file descriptor fd. File
- descriptors are obtained from calls like open, dup, creat, pipe or
- fileno (in the file has been previously opened with fopen).
- The mode parameter is as in gzopen.
- The next call of gzclose on the returned gzFile will also close the
- file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
- descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
- gzdopen returns NULL if there was insufficient memory to allocate
- the (de)compression state.
-*/
-
-ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
-/*
- Dynamically update the compression level or strategy. See the description
- of deflateInit2 for the meaning of these parameters.
- gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
- opened for writing.
-*/
-
-ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
-/*
- Reads the given number of uncompressed bytes from the compressed file.
- If the input file was not in gzip format, gzread copies the given number
- of bytes into the buffer.
- gzread returns the number of uncompressed bytes actually read (0 for
- end of file, -1 for error). */
-
-ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
- voidpc buf, unsigned len));
-/*
- Writes the given number of uncompressed bytes into the compressed file.
- gzwrite returns the number of uncompressed bytes actually written
- (0 in case of error).
-*/
-
-ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
-/*
- Converts, formats, and writes the args to the compressed file under
- control of the format string, as in fprintf. gzprintf returns the number of
- uncompressed bytes actually written (0 in case of error). The number of
- uncompressed bytes written is limited to 4095. The caller should assure that
- this limit is not exceeded. If it is exceeded, then gzprintf() will return
- return an error (0) with nothing written. In this case, there may also be a
- buffer overflow with unpredictable consequences, which is possible only if
- zlib was compiled with the insecure functions sprintf() or vsprintf()
- because the secure snprintf() or vsnprintf() functions were not available.
-*/
-
-ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
-/*
- Writes the given null-terminated string to the compressed file, excluding
- the terminating null character.
- gzputs returns the number of characters written, or -1 in case of error.
-*/
-
-ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
-/*
- Reads bytes from the compressed file until len-1 characters are read, or
- a newline character is read and transferred to buf, or an end-of-file
- condition is encountered. The string is then terminated with a null
- character.
- gzgets returns buf, or Z_NULL in case of error.
-*/
-
-ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
-/*
- Writes c, converted to an unsigned char, into the compressed file.
- gzputc returns the value that was written, or -1 in case of error.
-*/
-
-ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
-/*
- Reads one byte from the compressed file. gzgetc returns this byte
- or -1 in case of end of file or error.
-*/
-
-ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
-/*
- Push one character back onto the stream to be read again later.
- Only one character of push-back is allowed. gzungetc() returns the
- character pushed, or -1 on failure. gzungetc() will fail if a
- character has been pushed but not read yet, or if c is -1. The pushed
- character will be discarded if the stream is repositioned with gzseek()
- or gzrewind().
-*/
-
-ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
-/*
- Flushes all pending output into the compressed file. The parameter
- flush is as in the deflate() function. The return value is the zlib
- error number (see function gzerror below). gzflush returns Z_OK if
- the flush parameter is Z_FINISH and all output could be flushed.
- gzflush should be called only when strictly necessary because it can
- degrade compression.
-*/
-
-ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
- z_off_t offset, int whence));
-/*
- Sets the starting position for the next gzread or gzwrite on the
- given compressed file. The offset represents a number of bytes in the
- uncompressed data stream. The whence parameter is defined as in lseek(2);
- the value SEEK_END is not supported.
- If the file is opened for reading, this function is emulated but can be
- extremely slow. If the file is opened for writing, only forward seeks are
- supported; gzseek then compresses a sequence of zeroes up to the new
- starting position.
-
- gzseek returns the resulting offset location as measured in bytes from
- the beginning of the uncompressed stream, or -1 in case of error, in
- particular if the file is opened for writing and the new starting position
- would be before the current position.
-*/
-
-ZEXTERN int ZEXPORT gzrewind OF((gzFile file));
-/*
- Rewinds the given file. This function is supported only for reading.
-
- gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
-*/
-
-ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file));
-/*
- Returns the starting position for the next gzread or gzwrite on the
- given compressed file. This position represents a number of bytes in the
- uncompressed data stream.
-
- gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
-*/
-
-ZEXTERN int ZEXPORT gzeof OF((gzFile file));
-/*
- Returns 1 when EOF has previously been detected reading the given
- input stream, otherwise zero.
-*/
-
-ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
-/*
- Returns 1 if file is being read directly without decompression, otherwise
- zero.
-*/
-
-ZEXTERN int ZEXPORT gzclose OF((gzFile file));
-/*
- Flushes all pending output if necessary, closes the compressed file
- and deallocates all the (de)compression state. The return value is the zlib
- error number (see function gzerror below).
-*/
-
-ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
-/*
- Returns the error message for the last error which occurred on the
- given compressed file. errnum is set to zlib error number. If an
- error occurred in the file system and not in the compression library,
- errnum is set to Z_ERRNO and the application may consult errno
- to get the exact error code.
-*/
-
-ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
-/*
- Clears the error and end-of-file flags for file. This is analogous to the
- clearerr() function in stdio. This is useful for continuing to read a gzip
- file that is being written concurrently.
-*/
-
- /* checksum functions */
-
-/*
- These functions are not related to compression but are exported
- anyway because they might be useful in applications using the
- compression library.
-*/
-
-ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
-/*
- Update a running Adler-32 checksum with the bytes buf[0..len-1] and
- return the updated checksum. If buf is NULL, this function returns
- the required initial value for the checksum.
- An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
- much faster. Usage example:
-
- uLong adler = adler32(0L, Z_NULL, 0);
-
- while (read_buffer(buffer, length) != EOF) {
- adler = adler32(adler, buffer, length);
- }
- if (adler != original_adler) error();
-*/
-
-ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
- z_off_t len2));
-/*
- Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
- and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
- each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
- seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
-*/
-
-ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
-/*
- Update a running CRC-32 with the bytes buf[0..len-1] and return the
- updated CRC-32. If buf is NULL, this function returns the required initial
- value for the for the crc. Pre- and post-conditioning (one's complement) is
- performed within this function so it shouldn't be done by the application.
- Usage example:
-
- uLong crc = crc32(0L, Z_NULL, 0);
-
- while (read_buffer(buffer, length) != EOF) {
- crc = crc32(crc, buffer, length);
- }
- if (crc != original_crc) error();
-*/
-
-ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
-
-/*
- Combine two CRC-32 check values into one. For two sequences of bytes,
- seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
- calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32
- check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
- len2.
-*/
-
-
- /* various hacks, don't look :) */
-
-/* deflateInit and inflateInit are macros to allow checking the zlib version
- * and the compiler's view of z_stream:
- */
-ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
- const char *version, int stream_size));
-ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
- const char *version, int stream_size));
-ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
- int windowBits, int memLevel,
- int strategy, const char *version,
- int stream_size));
-ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
- const char *version, int stream_size));
-ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
- unsigned char FAR *window,
- const char *version,
- int stream_size));
-#define deflateInit(strm, level) \
- deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
-#define inflateInit(strm) \
- inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
-#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
- deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
- (strategy), ZLIB_VERSION, sizeof(z_stream))
-#define inflateInit2(strm, windowBits) \
- inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
-#define inflateBackInit(strm, windowBits, window) \
- inflateBackInit_((strm), (windowBits), (window), \
- ZLIB_VERSION, sizeof(z_stream))
-
-
-#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
- struct internal_state {int dummy;}; /* hack for buggy compilers */
-#endif
-
-ZEXTERN const char * ZEXPORT zError OF((int));
-ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));
-ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* ZLIB_H */
+++ /dev/null
-/* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2005 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#include "zutil.h"
-
-#ifndef NO_DUMMY_DECL
-struct internal_state {int dummy;}; /* for buggy compilers */
-#endif
-
-const char * const z_errmsg[10] = {
-"need dictionary", /* Z_NEED_DICT 2 */
-"stream end", /* Z_STREAM_END 1 */
-"", /* Z_OK 0 */
-"file error", /* Z_ERRNO (-1) */
-"stream error", /* Z_STREAM_ERROR (-2) */
-"data error", /* Z_DATA_ERROR (-3) */
-"insufficient memory", /* Z_MEM_ERROR (-4) */
-"buffer error", /* Z_BUF_ERROR (-5) */
-"incompatible version",/* Z_VERSION_ERROR (-6) */
-""};
-
-
-const char * ZEXPORT zlibVersion()
-{
- return ZLIB_VERSION;
-}
-
-uLong ZEXPORT zlibCompileFlags()
-{
- uLong flags;
-
- flags = 0;
- switch (sizeof(uInt)) {
- case 2: break;
- case 4: flags += 1; break;
- case 8: flags += 2; break;
- default: flags += 3;
- }
- switch (sizeof(uLong)) {
- case 2: break;
- case 4: flags += 1 << 2; break;
- case 8: flags += 2 << 2; break;
- default: flags += 3 << 2;
- }
- switch (sizeof(voidpf)) {
- case 2: break;
- case 4: flags += 1 << 4; break;
- case 8: flags += 2 << 4; break;
- default: flags += 3 << 4;
- }
- switch (sizeof(z_off_t)) {
- case 2: break;
- case 4: flags += 1 << 6; break;
- case 8: flags += 2 << 6; break;
- default: flags += 3 << 6;
- }
-#ifdef DEBUG
- flags += 1 << 8;
-#endif
-#if defined(ASMV) || defined(ASMINF)
- flags += 1 << 9;
-#endif
-#ifdef ZLIB_WINAPI
- flags += 1 << 10;
-#endif
-#ifdef BUILDFIXED
- flags += 1 << 12;
-#endif
-#ifdef DYNAMIC_CRC_TABLE
- flags += 1 << 13;
-#endif
-#ifdef NO_GZCOMPRESS
- flags += 1L << 16;
-#endif
-#ifdef NO_GZIP
- flags += 1L << 17;
-#endif
-#ifdef PKZIP_BUG_WORKAROUND
- flags += 1L << 20;
-#endif
-#ifdef FASTEST
- flags += 1L << 21;
-#endif
-#ifdef STDC
-# ifdef NO_vsnprintf
- flags += 1L << 25;
-# ifdef HAS_vsprintf_void
- flags += 1L << 26;
-# endif
-# else
-# ifdef HAS_vsnprintf_void
- flags += 1L << 26;
-# endif
-# endif
-#else
- flags += 1L << 24;
-# ifdef NO_snprintf
- flags += 1L << 25;
-# ifdef HAS_sprintf_void
- flags += 1L << 26;
-# endif
-# else
-# ifdef HAS_snprintf_void
- flags += 1L << 26;
-# endif
-# endif
-#endif
- return flags;
-}
-
-#ifdef DEBUG
-
-# ifndef verbose
-# define verbose 0
-# endif
-int z_verbose = verbose;
-
-void z_error (m)
- char *m;
-{
- fprintf(stderr, "%s\n", m);
- exit(1);
-}
-#endif
-
-/* exported to allow conversion of error code to string for compress() and
- * uncompress()
- */
-const char * ZEXPORT zError(err)
- int err;
-{
- return ERR_MSG(err);
-}
-
-#if defined(_WIN32_WCE)
- /* The Microsoft C Run-Time Library for Windows CE doesn't have
- * errno. We define it as a global variable to simplify porting.
- * Its value is always 0 and should not be used.
- */
- int errno = 0;
-#endif
-
-#ifndef HAVE_MEMCPY
-
-void zmemcpy(dest, source, len)
- Bytef* dest;
- const Bytef* source;
- uInt len;
-{
- if (len == 0) return;
- do {
- *dest++ = *source++; /* ??? to be unrolled */
- } while (--len != 0);
-}
-
-int zmemcmp(s1, s2, len)
- const Bytef* s1;
- const Bytef* s2;
- uInt len;
-{
- uInt j;
-
- for (j = 0; j < len; j++) {
- if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
- }
- return 0;
-}
-
-void zmemzero(dest, len)
- Bytef* dest;
- uInt len;
-{
- if (len == 0) return;
- do {
- *dest++ = 0; /* ??? to be unrolled */
- } while (--len != 0);
-}
-#endif
-
-
-#ifdef SYS16BIT
-
-#ifdef __TURBOC__
-/* Turbo C in 16-bit mode */
-
-# define MY_ZCALLOC
-
-/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
- * and farmalloc(64K) returns a pointer with an offset of 8, so we
- * must fix the pointer. Warning: the pointer must be put back to its
- * original form in order to free it, use zcfree().
- */
-
-#define MAX_PTR 10
-/* 10*64K = 640K */
-
-local int next_ptr = 0;
-
-typedef struct ptr_table_s {
- voidpf org_ptr;
- voidpf new_ptr;
-} ptr_table;
-
-local ptr_table table[MAX_PTR];
-/* This table is used to remember the original form of pointers
- * to large buffers (64K). Such pointers are normalized with a zero offset.
- * Since MSDOS is not a preemptive multitasking OS, this table is not
- * protected from concurrent access. This hack doesn't work anyway on
- * a protected system like OS/2. Use Microsoft C instead.
- */
-
-voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
-{
- voidpf buf = opaque; /* just to make some compilers happy */
- ulg bsize = (ulg)items*size;
-
- /* If we allocate less than 65520 bytes, we assume that farmalloc
- * will return a usable pointer which doesn't have to be normalized.
- */
- if (bsize < 65520L) {
- buf = farmalloc(bsize);
- if (*(ush*)&buf != 0) return buf;
- } else {
- buf = farmalloc(bsize + 16L);
- }
- if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
- table[next_ptr].org_ptr = buf;
-
- /* Normalize the pointer to seg:0 */
- *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
- *(ush*)&buf = 0;
- table[next_ptr++].new_ptr = buf;
- return buf;
-}
-
-void zcfree (voidpf opaque, voidpf ptr)
-{
- int n;
- if (*(ush*)&ptr != 0) { /* object < 64K */
- farfree(ptr);
- return;
- }
- /* Find the original pointer */
- for (n = 0; n < next_ptr; n++) {
- if (ptr != table[n].new_ptr) continue;
-
- farfree(table[n].org_ptr);
- while (++n < next_ptr) {
- table[n-1] = table[n];
- }
- next_ptr--;
- return;
- }
- ptr = opaque; /* just to make some compilers happy */
- Assert(0, "zcfree: ptr not found");
-}
-
-#endif /* __TURBOC__ */
-
-
-#ifdef M_I86
-/* Microsoft C in 16-bit mode */
-
-# define MY_ZCALLOC
-
-#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
-# define _halloc halloc
-# define _hfree hfree
-#endif
-
-voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
-{
- if (opaque) opaque = 0; /* to make compiler happy */
- return _halloc((long)items, size);
-}
-
-void zcfree (voidpf opaque, voidpf ptr)
-{
- if (opaque) opaque = 0; /* to make compiler happy */
- _hfree(ptr);
-}
-
-#endif /* M_I86 */
-
-#endif /* SYS16BIT */
-
-
-#ifndef MY_ZCALLOC /* Any system without a special alloc function */
-
-#ifndef STDC
-extern voidp malloc OF((uInt size));
-extern voidp calloc OF((uInt items, uInt size));
-extern void free OF((voidpf ptr));
-#endif
-
-voidpf zcalloc (opaque, items, size)
- voidpf opaque;
- unsigned items;
- unsigned size;
-{
- if (opaque) items += size - size; /* make compiler happy */
- return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
- (voidpf)calloc(items, size);
-}
-
-void zcfree (opaque, ptr)
- voidpf opaque;
- voidpf ptr;
-{
- free(ptr);
- if (opaque) return; /* make compiler happy */
-}
-
-#endif /* MY_ZCALLOC */
+++ /dev/null
-/* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2005 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* WARNING: this file should *not* be used by applications. It is
- part of the implementation of the compression library and is
- subject to change. Applications should only use zlib.h.
- */
-
-/* @(#) $Id$ */
-
-#ifndef ZUTIL_H
-#define ZUTIL_H
-
-#define ZLIB_INTERNAL
-#include "zlib.h"
-
-#ifdef STDC
-# ifndef _WIN32_WCE
-# include <stddef.h>
-# endif
-# include <string.h>
-# include <stdlib.h>
-#endif
-#ifdef NO_ERRNO_H
-# ifdef _WIN32_WCE
- /* The Microsoft C Run-Time Library for Windows CE doesn't have
- * errno. We define it as a global variable to simplify porting.
- * Its value is always 0 and should not be used. We rename it to
- * avoid conflict with other libraries that use the same workaround.
- */
-# define errno z_errno
-# endif
- extern int errno;
-#else
-# ifndef _WIN32_WCE
-# include <errno.h>
-# endif
-#endif
-
-#ifndef local
-# define local static
-#endif
-/* compile with -Dlocal if your debugger can't find static symbols */
-
-typedef unsigned char uch;
-typedef uch FAR uchf;
-typedef unsigned short ush;
-typedef ush FAR ushf;
-typedef unsigned long ulg;
-
-extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
-/* (size given to avoid silly warnings with Visual C++) */
-
-#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
-
-#define ERR_RETURN(strm,err) \
- return (strm->msg = (char*)ERR_MSG(err), (err))
-/* To be used only when the state is known to be valid */
-
- /* common constants */
-
-#ifndef DEF_WBITS
-# define DEF_WBITS MAX_WBITS
-#endif
-/* default windowBits for decompression. MAX_WBITS is for compression only */
-
-#if MAX_MEM_LEVEL >= 8
-# define DEF_MEM_LEVEL 8
-#else
-# define DEF_MEM_LEVEL MAX_MEM_LEVEL
-#endif
-/* default memLevel */
-
-#define STORED_BLOCK 0
-#define STATIC_TREES 1
-#define DYN_TREES 2
-/* The three kinds of block type */
-
-#define MIN_MATCH 3
-#define MAX_MATCH 258
-/* The minimum and maximum match lengths */
-
-#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
-
- /* target dependencies */
-
-#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
-# define OS_CODE 0x00
-# if defined(__TURBOC__) || defined(__BORLANDC__)
-# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
- /* Allow compilation with ANSI keywords only enabled */
- void _Cdecl farfree( void *block );
- void *_Cdecl farmalloc( unsigned long nbytes );
-# else
-# include <alloc.h>
-# endif
-# else /* MSC or DJGPP */
-# include <malloc.h>
-# endif
-#endif
-
-#ifdef AMIGA
-# define OS_CODE 0x01
-#endif
-
-#if defined(VAXC) || defined(VMS)
-# define OS_CODE 0x02
-# define F_OPEN(name, mode) \
- fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
-#endif
-
-#if defined(ATARI) || defined(atarist)
-# define OS_CODE 0x05
-#endif
-
-#ifdef OS2
-# define OS_CODE 0x06
-# ifdef M_I86
- #include <malloc.h>
-# endif
-#endif
-
-#if defined(MACOS) || defined(TARGET_OS_MAC)
-# define OS_CODE 0x07
-# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
-# include <unix.h> /* for fdopen */
-# else
-# ifndef fdopen
-# define fdopen(fd,mode) NULL /* No fdopen() */
-# endif
-# endif
-#endif
-
-#ifdef TOPS20
-# define OS_CODE 0x0a
-#endif
-
-#ifdef WIN32
-# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
-# define OS_CODE 0x0b
-# endif
-#endif
-
-#ifdef __50SERIES /* Prime/PRIMOS */
-# define OS_CODE 0x0f
-#endif
-
-#if defined(_BEOS_) || defined(RISCOS)
-# define fdopen(fd,mode) NULL /* No fdopen() */
-#endif
-
-#if (defined(_MSC_VER) && (_MSC_VER > 600))
-# if defined(_WIN32_WCE)
-# define fdopen(fd,mode) NULL /* No fdopen() */
-# ifndef _PTRDIFF_T_DEFINED
- typedef int ptrdiff_t;
-# define _PTRDIFF_T_DEFINED
-# endif
-# else
-# define fdopen(fd,type) _fdopen(fd,type)
-# endif
-#endif
-
- /* common defaults */
-
-#ifndef OS_CODE
-# define OS_CODE 0x03 /* assume Unix */
-#endif
-
-#ifndef F_OPEN
-# define F_OPEN(name, mode) fopen((name), (mode))
-#endif
-
- /* functions */
-
-#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
-# ifndef HAVE_VSNPRINTF
-# define HAVE_VSNPRINTF
-# endif
-#endif
-#if defined(__CYGWIN__)
-# ifndef HAVE_VSNPRINTF
-# define HAVE_VSNPRINTF
-# endif
-#endif
-#ifndef HAVE_VSNPRINTF
-# ifdef MSDOS
- /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
- but for now we just assume it doesn't. */
-# define NO_vsnprintf
-# endif
-# ifdef __TURBOC__
-# define NO_vsnprintf
-# endif
-# ifdef WIN32
- /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
-# if !defined(vsnprintf) && !defined(NO_vsnprintf)
-# define vsnprintf _vsnprintf
-# endif
-# endif
-# ifdef __SASC
-# define NO_vsnprintf
-# endif
-#endif
-#ifdef VMS
-# define NO_vsnprintf
-#endif
-
-#if defined(pyr)
-# define NO_MEMCPY
-#endif
-#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
- /* Use our own functions for small and medium model with MSC <= 5.0.
- * You may have to use the same strategy for Borland C (untested).
- * The __SC__ check is for Symantec.
- */
-# define NO_MEMCPY
-#endif
-#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
-# define HAVE_MEMCPY
-#endif
-#ifdef HAVE_MEMCPY
-# ifdef SMALL_MEDIUM /* MSDOS small or medium model */
-# define zmemcpy _fmemcpy
-# define zmemcmp _fmemcmp
-# define zmemzero(dest, len) _fmemset(dest, 0, len)
-# else
-# define zmemcpy memcpy
-# define zmemcmp memcmp
-# define zmemzero(dest, len) memset(dest, 0, len)
-# endif
-#else
- extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
- extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
- extern void zmemzero OF((Bytef* dest, uInt len));
-#endif
-
-/* Diagnostic functions */
-#ifdef DEBUG
-# include <stdio.h>
- extern int z_verbose;
- extern void z_error OF((char *m));
-# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
-# define Trace(x) {if (z_verbose>=0) fprintf x ;}
-# define Tracev(x) {if (z_verbose>0) fprintf x ;}
-# define Tracevv(x) {if (z_verbose>1) fprintf x ;}
-# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
-# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
-#else
-# define Assert(cond,msg)
-# define Trace(x)
-# define Tracev(x)
-# define Tracevv(x)
-# define Tracec(c,x)
-# define Tracecv(c,x)
-#endif
-
-
-voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
-void zcfree OF((voidpf opaque, voidpf ptr));
-
-#define ZALLOC(strm, items, size) \
- (*((strm)->zalloc))((strm)->opaque, (items), (size))
-#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
-#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
-
-#endif /* ZUTIL_H */
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