2 /* pngconf.h - machine configurable file for libpng
4 * libpng version 1.4.4 - September 23, 2010
5 * For conditions of distribution and use, see copyright notice in png.h
6 * Copyright (c) 1998-2010 Glenn Randers-Pehrson
7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
10 * This code is released under the libpng license.
11 * For conditions of distribution and use, see the disclaimer
12 * and license in png.h
16 /* Any machine specific code is near the front of this file, so if you
17 * are configuring libpng for a machine, you may want to read the section
18 * starting here down to where it starts to typedef png_color, png_text,
25 #ifndef PNG_NO_LIMITS_H
29 /* Added at libpng-1.2.9 */
31 /* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"
34 #ifdef PNG_CONFIGURE_LIBPNG
41 * Added at libpng-1.2.8
43 * PNG_USER_CONFIG has to be defined on the compiler command line. This
44 * includes the resource compiler for Windows DLL configurations.
46 #ifdef PNG_USER_CONFIG
48 # ifndef PNG_USER_PRIVATEBUILD
49 # define PNG_USER_PRIVATEBUILD
54 * If you create a private DLL you should define in "pngusr.h" the following:
55 * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
57 * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
58 * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
59 * distinguish your DLL from those of the official release. These
60 * correspond to the trailing letters that come after the version
61 * number and must match your private DLL name>
62 * e.g. // private DLL "libpng14gx.dll"
63 * #define PNG_USER_DLLFNAME_POSTFIX "gx"
65 * The following macros are also at your disposal if you want to complete the
66 * DLL VERSIONINFO structure.
67 * - PNG_USER_VERSIONINFO_COMMENTS
68 * - PNG_USER_VERSIONINFO_COMPANYNAME
69 * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
74 # pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
75 are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
79 # pragma message("PRIVATEBUILD is deprecated.\
80 Use PNG_USER_PRIVATEBUILD instead.")
81 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD
85 /* End of material added to libpng-1.2.8 */
87 #ifndef PNG_VERSION_INFO_ONLY
89 /* This is the size of the compression buffer, and thus the size of
90 * an IDAT chunk. Make this whatever size you feel is best for your
91 * machine. One of these will be allocated per png_struct. When this
92 * is full, it writes the data to the disk, and does some other
93 * calculations. Making this an extremely small size will slow
94 * the library down, but you may want to experiment to determine
95 * where it becomes significant, if you are concerned with memory
96 * usage. Note that zlib allocates at least 32Kb also. For readers,
97 * this describes the size of the buffer available to read the data in.
98 * Unless this gets smaller than the size of a row (compressed),
99 * it should not make much difference how big this is.
102 #ifndef PNG_ZBUF_SIZE
103 # define PNG_ZBUF_SIZE 8192
106 /* Enable if you want a write-only libpng */
108 #ifndef PNG_NO_READ_SUPPORTED
109 # define PNG_READ_SUPPORTED
112 /* Enable if you want a read-only libpng */
114 #ifndef PNG_NO_WRITE_SUPPORTED
115 # define PNG_WRITE_SUPPORTED
118 /* Enabled in 1.4.0. */
119 #ifdef PNG_ALLOW_BENIGN_ERRORS
120 # define png_benign_error png_warning
121 # define png_chunk_benign_error png_chunk_warning
123 # ifndef PNG_BENIGN_ERRORS_SUPPORTED
124 # define png_benign_error png_error
125 # define png_chunk_benign_error png_chunk_error
129 /* Added at libpng version 1.4.0 */
130 #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)
131 # define PNG_WARNINGS_SUPPORTED
134 /* Added at libpng version 1.4.0 */
135 #if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)
136 # define PNG_ERROR_TEXT_SUPPORTED
139 /* Added at libpng version 1.4.0 */
140 #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)
141 # define PNG_CHECK_cHRM_SUPPORTED
144 /* Added at libpng version 1.4.0 */
145 #if !defined(PNG_NO_ALIGNED_MEMORY) && !defined(PNG_ALIGNED_MEMORY_SUPPORTED)
146 # define PNG_ALIGNED_MEMORY_SUPPORTED
149 /* Enabled by default in 1.2.0. You can disable this if you don't need to
150 support PNGs that are embedded in MNG datastreams */
151 #ifndef PNG_NO_MNG_FEATURES
152 # ifndef PNG_MNG_FEATURES_SUPPORTED
153 # define PNG_MNG_FEATURES_SUPPORTED
157 /* Added at libpng version 1.4.0 */
158 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
159 # ifndef PNG_FLOATING_POINT_SUPPORTED
160 # define PNG_FLOATING_POINT_SUPPORTED
164 /* Added at libpng-1.4.0beta49 for testing (this test is no longer used
165 in libpng and png_calloc() is always present)
167 #define PNG_CALLOC_SUPPORTED
169 /* If you are running on a machine where you cannot allocate more
170 * than 64K of memory at once, uncomment this. While libpng will not
171 * normally need that much memory in a chunk (unless you load up a very
172 * large file), zlib needs to know how big of a chunk it can use, and
173 * libpng thus makes sure to check any memory allocation to verify it
174 * will fit into memory.
175 #define PNG_MAX_MALLOC_64K
177 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
178 # define PNG_MAX_MALLOC_64K
181 /* Special munging to support doing things the 'cygwin' way:
182 * 'Normal' png-on-win32 defines/defaults:
183 * PNG_BUILD_DLL -- building dll
184 * PNG_USE_DLL -- building an application, linking to dll
185 * (no define) -- building static library, or building an
186 * application and linking to the static lib
187 * 'Cygwin' defines/defaults:
188 * PNG_BUILD_DLL -- (ignored) building the dll
189 * (no define) -- (ignored) building an application, linking to the dll
190 * PNG_STATIC -- (ignored) building the static lib, or building an
191 * application that links to the static lib.
192 * ALL_STATIC -- (ignored) building various static libs, or building an
193 * application that links to the static libs.
195 * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
196 * this bit of #ifdefs will define the 'correct' config variables based on
197 * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
200 * Also, the precedence order is:
201 * ALL_STATIC (since we can't #undef something outside our namespace)
204 * (nothing) == PNG_USE_DLL
206 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
207 * of auto-import in binutils, we no longer need to worry about
208 * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
209 * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
210 * to __declspec() stuff. However, we DO need to worry about
211 * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
212 * such as CONSOLE_IO.
216 # ifdef PNG_BUILD_DLL
217 # undef PNG_BUILD_DLL
229 # ifdef PNG_BUILD_DLL
259 /* This protects us against compilers that run on a windowing system
260 * and thus don't have or would rather us not use the stdio types:
261 * stdin, stdout, and stderr. The only one currently used is stderr
262 * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will
263 * prevent these from being compiled and used. #defining PNG_NO_STDIO
264 * will also prevent these, plus will prevent the entire set of stdio
265 * macros and functions (FILE *, printf, etc.) from being compiled and used,
266 * unless (PNG_DEBUG > 0) has been #defined.
268 * #define PNG_NO_CONSOLE_IO
269 * #define PNG_NO_STDIO
273 # define PNG_NO_CONSOLE_IO
274 # define PNG_NO_STDIO
275 # define PNG_NO_TIME_RFC1123
281 #if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)
282 # define PNG_STDIO_SUPPORTED
286 # if !defined(PNG_CONSOLE_IO_SUPPORTED) && !defined(PNG_NO_CONSOLE_IO)
287 # define PNG_NO_CONSOLE_IO
292 # ifndef PNG_NO_CONSOLE_IO
293 # define PNG_NO_CONSOLE_IO
304 #if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)
305 # define PNG_CONSOLE_IO_SUPPORTED
308 /* This macro protects us against machines that don't have function
309 * prototypes (ie K&R style headers). If your compiler does not handle
310 * function prototypes, define this macro and use the included ansi2knr.
311 * I've always been able to use _NO_PROTO as the indicator, but you may
312 * need to drag the empty declaration out in front of here, or change the
313 * ifdef to suit your own needs.
317 #ifdef OF /* zlib prototype munger */
318 # define PNGARG(arglist) OF(arglist)
322 # define PNGARG(arglist) ()
324 # define PNGARG(arglist) arglist
325 #endif /* _NO_PROTO */
331 /* Try to determine if we are compiling on a Mac. Note that testing for
332 * just __MWERKS__ is not good enough, because the Codewarrior is now used
333 * on non-Mac platforms.
336 # if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
337 defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
342 /* Enough people need this for various reasons to include it here */
343 #if !defined(MACOS) && !defined(RISCOS)
344 # include <sys/types.h>
347 /* PNG_SETJMP_NOT_SUPPORTED and PNG_NO_SETJMP_SUPPORTED are deprecated. */
348 #if !defined(PNG_NO_SETJMP) && \
349 !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
350 # define PNG_SETJMP_SUPPORTED
353 #ifdef PNG_SETJMP_SUPPORTED
354 /* This is an attempt to force a single setjmp behaviour on Linux. If
355 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
357 * You can bypass this test if you know that your application uses exactly
358 * the same setjmp.h that was included when libpng was built. Only define
359 * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
360 * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
361 * while building a separate libpng library for general use.
364 # ifndef PNG_SKIP_SETJMP_CHECK
367 # define PNG_SAVE_BSD_SOURCE
371 /* If you encounter a compiler error here, see the explanation
372 * near the end of INSTALL.
374 __pngconf.h__ in libpng already includes setjmp.h;
375 __dont__ include it again.;
377 # endif /* __linux__ */
378 # endif /* PNG_SKIP_SETJMP_CHECK */
380 /* Include setjmp.h for error handling */
384 # ifdef PNG_SAVE_BSD_SOURCE
389 # undef PNG_SAVE_BSD_SOURCE
391 # endif /* __linux__ */
392 #endif /* PNG_SETJMP_SUPPORTED */
395 # include <strings.h>
400 /* Other defines for things like memory and the like can go here. */
402 /* This controls how fine the quantizing gets. As this allocates
403 * a largish chunk of memory (32K), those who are not as concerned
404 * with quantizing quality can decrease some or all of these.
407 /* Prior to libpng-1.4.2, these were PNG_DITHER_*_BITS
408 * These migration aids will be removed from libpng-1.5.0.
410 #ifdef PNG_DITHER_RED_BITS
411 # define PNG_QUANTIZE_RED_BITS PNG_DITHER_RED_BITS
413 #ifdef PNG_DITHER_GREEN_BITS
414 # define PNG_QUANTIZE_GREEN_BITS PNG_DITHER_GREEN_BITS
416 #ifdef PNG_DITHER_BLUE_BITS
417 # define PNG_QUANTIZE_BLUE_BITS PNG_DITHER_BLUE_BITS
420 #ifndef PNG_QUANTIZE_RED_BITS
421 # define PNG_QUANTIZE_RED_BITS 5
423 #ifndef PNG_QUANTIZE_GREEN_BITS
424 # define PNG_QUANTIZE_GREEN_BITS 5
426 #ifndef PNG_QUANTIZE_BLUE_BITS
427 # define PNG_QUANTIZE_BLUE_BITS 5
430 /* This controls how fine the gamma correction becomes when you
431 * are only interested in 8 bits anyway. Increasing this value
432 * results in more memory being used, and more pow() functions
433 * being called to fill in the gamma tables. Don't set this value
434 * less then 8, and even that may not work (I haven't tested it).
437 #ifndef PNG_MAX_GAMMA_8
438 # define PNG_MAX_GAMMA_8 11
441 /* This controls how much a difference in gamma we can tolerate before
442 * we actually start doing gamma conversion.
444 #ifndef PNG_GAMMA_THRESHOLD
445 # define PNG_GAMMA_THRESHOLD 0.05
448 /* The following uses const char * instead of char * for error
449 * and warning message functions, so some compilers won't complain.
450 * If you do not want to use const, define PNG_NO_CONST.
454 # ifndef PNG_NO_CONST
455 # define PNG_CONST const
461 /* The following defines give you the ability to remove code from the
462 * library that you will not be using. I wish I could figure out how to
463 * automate this, but I can't do that without making it seriously hard
464 * on the users. So if you are not using an ability, change the #define
465 * to an #undef, or pass in PNG_NO_feature and that part of the library
466 * will not be compiled.
468 * If your linker can't find a function, you may want to make sure the
469 * ability is defined here. Some of these depend upon some others being
470 * defined. I haven't figured out all the interactions here, so you may
471 * have to experiment awhile to get everything to compile. If you are
472 * creating or using a shared library, you probably shouldn't touch this,
473 * as it will affect the size of the structures, and this will cause bad
474 * things to happen if the library and/or application ever change.
477 /* Any features you will not be using can be undef'ed here */
479 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
480 * to turn it off with PNG_NO_READ|WRITE_TRANSFORMS on the compile line,
481 * then pick and choose which ones to define without having to edit this
482 * file. It is safe to use the PNG_NO_READ|WRITE_TRANSFORMS
483 * if you only want to have a png-compliant reader/writer but don't need
484 * any of the extra transformations. This saves about 80 kbytes in a
485 * typical installation of the library. (PNG_NO_* form added in version
486 * 1.0.1c, for consistency; PNG_*_TRANSFORMS_NOT_SUPPORTED deprecated in
490 /* Ignore attempt to turn off both floating and fixed point support */
491 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
492 !defined(PNG_NO_FIXED_POINT_SUPPORTED)
493 # define PNG_FIXED_POINT_SUPPORTED
496 #ifdef PNG_READ_SUPPORTED
498 /* PNG_READ_TRANSFORMS_NOT_SUPPORTED is deprecated. */
499 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
500 !defined(PNG_NO_READ_TRANSFORMS)
501 # define PNG_READ_TRANSFORMS_SUPPORTED
504 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
505 # ifndef PNG_NO_READ_EXPAND
506 # define PNG_READ_EXPAND_SUPPORTED
508 # ifndef PNG_NO_READ_SHIFT
509 # define PNG_READ_SHIFT_SUPPORTED
511 # ifndef PNG_NO_READ_PACK
512 # define PNG_READ_PACK_SUPPORTED
514 # ifndef PNG_NO_READ_BGR
515 # define PNG_READ_BGR_SUPPORTED
517 # ifndef PNG_NO_READ_SWAP
518 # define PNG_READ_SWAP_SUPPORTED
520 # ifndef PNG_NO_READ_PACKSWAP
521 # define PNG_READ_PACKSWAP_SUPPORTED
523 # ifndef PNG_NO_READ_INVERT
524 # define PNG_READ_INVERT_SUPPORTED
526 # ifndef PNG_NO_READ_QUANTIZE
527 /* Prior to libpng-1.4.0 this was PNG_READ_DITHER_SUPPORTED */
528 # ifndef PNG_NO_READ_DITHER /* This migration aid will be removed */
529 # define PNG_READ_QUANTIZE_SUPPORTED
532 # ifndef PNG_NO_READ_BACKGROUND
533 # define PNG_READ_BACKGROUND_SUPPORTED
535 # ifndef PNG_NO_READ_16_TO_8
536 # define PNG_READ_16_TO_8_SUPPORTED
538 # ifndef PNG_NO_READ_FILLER
539 # define PNG_READ_FILLER_SUPPORTED
541 # ifndef PNG_NO_READ_GAMMA
542 # define PNG_READ_GAMMA_SUPPORTED
544 # ifndef PNG_NO_READ_GRAY_TO_RGB
545 # define PNG_READ_GRAY_TO_RGB_SUPPORTED
547 # ifndef PNG_NO_READ_SWAP_ALPHA
548 # define PNG_READ_SWAP_ALPHA_SUPPORTED
550 # ifndef PNG_NO_READ_INVERT_ALPHA
551 # define PNG_READ_INVERT_ALPHA_SUPPORTED
553 # ifndef PNG_NO_READ_STRIP_ALPHA
554 # define PNG_READ_STRIP_ALPHA_SUPPORTED
556 # ifndef PNG_NO_READ_USER_TRANSFORM
557 # define PNG_READ_USER_TRANSFORM_SUPPORTED
559 # ifndef PNG_NO_READ_RGB_TO_GRAY
560 # define PNG_READ_RGB_TO_GRAY_SUPPORTED
562 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
564 /* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
565 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
566 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
567 # define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
568 #endif /* about interlacing capability! You'll */
569 /* still have interlacing unless you change the following define: */
571 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
573 /* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
574 #if !defined(PNG_NO_SEQUENTIAL_READ) && \
575 !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
576 !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
577 # define PNG_SEQUENTIAL_READ_SUPPORTED
580 #ifndef PNG_NO_READ_COMPOSITE_NODIV
581 # ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
582 # define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
586 #if !defined(PNG_NO_GET_INT_32) || defined(PNG_READ_oFFS_SUPPORTED) || \
587 defined(PNG_READ_pCAL_SUPPORTED)
588 # ifndef PNG_GET_INT_32_SUPPORTED
589 # define PNG_GET_INT_32_SUPPORTED
593 #endif /* PNG_READ_SUPPORTED */
595 #ifdef PNG_WRITE_SUPPORTED
597 /* PNG_WRITE_TRANSFORMS_NOT_SUPPORTED is deprecated. */
598 #if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
599 !defined(PNG_NO_WRITE_TRANSFORMS)
600 # define PNG_WRITE_TRANSFORMS_SUPPORTED
603 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
604 # ifndef PNG_NO_WRITE_SHIFT
605 # define PNG_WRITE_SHIFT_SUPPORTED
607 # ifndef PNG_NO_WRITE_PACK
608 # define PNG_WRITE_PACK_SUPPORTED
610 # ifndef PNG_NO_WRITE_BGR
611 # define PNG_WRITE_BGR_SUPPORTED
613 # ifndef PNG_NO_WRITE_SWAP
614 # define PNG_WRITE_SWAP_SUPPORTED
616 # ifndef PNG_NO_WRITE_PACKSWAP
617 # define PNG_WRITE_PACKSWAP_SUPPORTED
619 # ifndef PNG_NO_WRITE_INVERT
620 # define PNG_WRITE_INVERT_SUPPORTED
622 # ifndef PNG_NO_WRITE_FILLER
623 # define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
625 # ifndef PNG_NO_WRITE_SWAP_ALPHA
626 # define PNG_WRITE_SWAP_ALPHA_SUPPORTED
628 # ifndef PNG_NO_WRITE_INVERT_ALPHA
629 # define PNG_WRITE_INVERT_ALPHA_SUPPORTED
631 # ifndef PNG_NO_WRITE_USER_TRANSFORM
632 # define PNG_WRITE_USER_TRANSFORM_SUPPORTED
634 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
636 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
637 !defined(PNG_WRITE_INTERLACING_SUPPORTED)
638 /* This is not required for PNG-compliant encoders, but can cause
639 * trouble if left undefined
641 # define PNG_WRITE_INTERLACING_SUPPORTED
644 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
645 !defined(PNG_WRITE_WEIGHTED_FILTER) && \
646 defined(PNG_FLOATING_POINT_SUPPORTED)
647 # define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
650 #ifndef PNG_NO_WRITE_FLUSH
651 # define PNG_WRITE_FLUSH_SUPPORTED
654 #if !defined(PNG_NO_SAVE_INT_32) || defined(PNG_WRITE_oFFS_SUPPORTED) || \
655 defined(PNG_WRITE_pCAL_SUPPORTED)
656 # ifndef PNG_SAVE_INT_32_SUPPORTED
657 # define PNG_SAVE_INT_32_SUPPORTED
661 #endif /* PNG_WRITE_SUPPORTED */
663 #define PNG_NO_ERROR_NUMBERS
665 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
666 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
667 # ifndef PNG_NO_USER_TRANSFORM_PTR
668 # define PNG_USER_TRANSFORM_PTR_SUPPORTED
672 #if defined(PNG_STDIO_SUPPORTED) && !defined(PNG_TIME_RFC1123_SUPPORTED)
673 # define PNG_TIME_RFC1123_SUPPORTED
676 /* This adds extra functions in pngget.c for accessing data from the
677 * info pointer (added in version 0.99)
678 * png_get_image_width()
679 * png_get_image_height()
680 * png_get_bit_depth()
681 * png_get_color_type()
682 * png_get_compression_type()
683 * png_get_filter_type()
684 * png_get_interlace_type()
685 * png_get_pixel_aspect_ratio()
686 * png_get_pixels_per_meter()
687 * png_get_x_offset_pixels()
688 * png_get_y_offset_pixels()
689 * png_get_x_offset_microns()
690 * png_get_y_offset_microns()
692 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
693 # define PNG_EASY_ACCESS_SUPPORTED
696 /* Added at libpng-1.2.0 */
697 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
698 # define PNG_USER_MEM_SUPPORTED
701 /* Added at libpng-1.2.6 */
702 #ifndef PNG_NO_SET_USER_LIMITS
703 # ifndef PNG_SET_USER_LIMITS_SUPPORTED
704 # define PNG_SET_USER_LIMITS_SUPPORTED
706 /* Feature added at libpng-1.4.0, this flag added at 1.4.1 */
707 # ifndef PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
708 # define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
710 /* Feature added at libpng-1.4.1, this flag added at 1.4.1 */
711 # ifndef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
712 # define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
716 /* Added at libpng-1.2.43 */
717 #ifndef PNG_USER_LIMITS_SUPPORTED
718 # ifndef PNG_NO_USER_LIMITS
719 # define PNG_USER_LIMITS_SUPPORTED
723 /* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGs no matter
724 * how large, set these two limits to 0x7fffffffL
726 #ifndef PNG_USER_WIDTH_MAX
727 # define PNG_USER_WIDTH_MAX 1000000L
729 #ifndef PNG_USER_HEIGHT_MAX
730 # define PNG_USER_HEIGHT_MAX 1000000L
733 /* Added at libpng-1.2.43. To accept all valid PNGs no matter
734 * how large, set these two limits to 0.
736 #ifndef PNG_USER_CHUNK_CACHE_MAX
737 # define PNG_USER_CHUNK_CACHE_MAX 0
740 /* Added at libpng-1.2.43 */
741 #ifndef PNG_USER_CHUNK_MALLOC_MAX
742 # define PNG_USER_CHUNK_MALLOC_MAX 0
745 /* Added at libpng-1.4.0 */
746 #if !defined(PNG_NO_IO_STATE) && !defined(PNG_IO_STATE_SUPPORTED)
747 # define PNG_IO_STATE_SUPPORTED
750 #ifndef PNG_LITERAL_SHARP
751 # define PNG_LITERAL_SHARP 0x23
753 #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
754 # define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
756 #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
757 # define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
759 #ifndef PNG_STRING_NEWLINE
760 #define PNG_STRING_NEWLINE "\n"
763 /* These are currently experimental features, define them if you want */
765 /* Very little testing */
767 #ifdef PNG_READ_SUPPORTED
768 # ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
769 # define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
774 /* This is only for PowerPC big-endian and 680x0 systems */
777 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
778 # define PNG_READ_BIG_ENDIAN_SUPPORTED
782 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
783 # define PNG_USE_READ_MACROS
786 /* Buggy compilers (e.g., gcc 2.7.2.2) need PNG_NO_POINTER_INDEXING */
788 #if !defined(PNG_NO_POINTER_INDEXING) && \
789 !defined(PNG_POINTER_INDEXING_SUPPORTED)
790 # define PNG_POINTER_INDEXING_SUPPORTED
794 /* Any chunks you are not interested in, you can undef here. The
795 * ones that allocate memory may be expecially important (hIST,
796 * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
800 /* The size of the png_text structure changed in libpng-1.0.6 when
801 * iTXt support was added. iTXt support was turned off by default through
802 * libpng-1.2.x, to support old apps that malloc the png_text structure
803 * instead of calling png_set_text() and letting libpng malloc it. It
804 * was turned on by default in libpng-1.4.0.
807 /* PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */
808 #if defined(PNG_READ_SUPPORTED) && \
809 !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
810 !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
811 # define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
814 /* PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */
815 #if defined(PNG_WRITE_SUPPORTED) && \
816 !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
817 !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
818 # define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
821 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
823 #ifdef PNG_NO_READ_TEXT
824 # define PNG_NO_READ_iTXt
825 # define PNG_NO_READ_tEXt
826 # define PNG_NO_READ_zTXt
829 #ifndef PNG_NO_READ_bKGD
830 # define PNG_READ_bKGD_SUPPORTED
831 # define PNG_bKGD_SUPPORTED
833 #ifndef PNG_NO_READ_cHRM
834 # define PNG_READ_cHRM_SUPPORTED
835 # define PNG_cHRM_SUPPORTED
837 #ifndef PNG_NO_READ_gAMA
838 # define PNG_READ_gAMA_SUPPORTED
839 # define PNG_gAMA_SUPPORTED
841 #ifndef PNG_NO_READ_hIST
842 # define PNG_READ_hIST_SUPPORTED
843 # define PNG_hIST_SUPPORTED
845 #ifndef PNG_NO_READ_iCCP
846 # define PNG_READ_iCCP_SUPPORTED
847 # define PNG_iCCP_SUPPORTED
849 #ifndef PNG_NO_READ_iTXt
850 # ifndef PNG_READ_iTXt_SUPPORTED
851 # define PNG_READ_iTXt_SUPPORTED
853 # ifndef PNG_iTXt_SUPPORTED
854 # define PNG_iTXt_SUPPORTED
857 #ifndef PNG_NO_READ_oFFs
858 # define PNG_READ_oFFs_SUPPORTED
859 # define PNG_oFFs_SUPPORTED
861 #ifndef PNG_NO_READ_pCAL
862 # define PNG_READ_pCAL_SUPPORTED
863 # define PNG_pCAL_SUPPORTED
865 #ifndef PNG_NO_READ_sCAL
866 # define PNG_READ_sCAL_SUPPORTED
867 # define PNG_sCAL_SUPPORTED
869 #ifndef PNG_NO_READ_pHYs
870 # define PNG_READ_pHYs_SUPPORTED
871 # define PNG_pHYs_SUPPORTED
873 #ifndef PNG_NO_READ_sBIT
874 # define PNG_READ_sBIT_SUPPORTED
875 # define PNG_sBIT_SUPPORTED
877 #ifndef PNG_NO_READ_sPLT
878 # define PNG_READ_sPLT_SUPPORTED
879 # define PNG_sPLT_SUPPORTED
881 #ifndef PNG_NO_READ_sRGB
882 # define PNG_READ_sRGB_SUPPORTED
883 # define PNG_sRGB_SUPPORTED
885 #ifndef PNG_NO_READ_tEXt
886 # define PNG_READ_tEXt_SUPPORTED
887 # define PNG_tEXt_SUPPORTED
889 #ifndef PNG_NO_READ_tIME
890 # define PNG_READ_tIME_SUPPORTED
891 # define PNG_tIME_SUPPORTED
893 #ifndef PNG_NO_READ_tRNS
894 # define PNG_READ_tRNS_SUPPORTED
895 # define PNG_tRNS_SUPPORTED
897 #ifndef PNG_NO_READ_zTXt
898 # define PNG_READ_zTXt_SUPPORTED
899 # define PNG_zTXt_SUPPORTED
901 #ifndef PNG_NO_READ_OPT_PLTE
902 # define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
903 #endif /* optional PLTE chunk in RGB and RGBA images */
904 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
905 defined(PNG_READ_zTXt_SUPPORTED)
906 # define PNG_READ_TEXT_SUPPORTED
907 # define PNG_TEXT_SUPPORTED
910 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
912 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
913 # ifndef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
914 # define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
916 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
917 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
919 # ifndef PNG_READ_USER_CHUNKS_SUPPORTED
920 # define PNG_READ_USER_CHUNKS_SUPPORTED
923 #ifndef PNG_NO_READ_USER_CHUNKS
924 # ifndef PNG_READ_USER_CHUNKS_SUPPORTED
925 # define PNG_READ_USER_CHUNKS_SUPPORTED
927 # ifndef PNG_USER_CHUNKS_SUPPORTED
928 # define PNG_USER_CHUNKS_SUPPORTED
931 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
932 # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
933 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
937 #ifdef PNG_WRITE_SUPPORTED
938 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
940 #ifdef PNG_NO_WRITE_TEXT
941 # define PNG_NO_WRITE_iTXt
942 # define PNG_NO_WRITE_tEXt
943 # define PNG_NO_WRITE_zTXt
945 #ifndef PNG_NO_WRITE_bKGD
946 # define PNG_WRITE_bKGD_SUPPORTED
947 # ifndef PNG_bKGD_SUPPORTED
948 # define PNG_bKGD_SUPPORTED
951 #ifndef PNG_NO_WRITE_cHRM
952 # define PNG_WRITE_cHRM_SUPPORTED
953 # ifndef PNG_cHRM_SUPPORTED
954 # define PNG_cHRM_SUPPORTED
957 #ifndef PNG_NO_WRITE_gAMA
958 # define PNG_WRITE_gAMA_SUPPORTED
959 # ifndef PNG_gAMA_SUPPORTED
960 # define PNG_gAMA_SUPPORTED
963 #ifndef PNG_NO_WRITE_hIST
964 # define PNG_WRITE_hIST_SUPPORTED
965 # ifndef PNG_hIST_SUPPORTED
966 # define PNG_hIST_SUPPORTED
969 #ifndef PNG_NO_WRITE_iCCP
970 # define PNG_WRITE_iCCP_SUPPORTED
971 # ifndef PNG_iCCP_SUPPORTED
972 # define PNG_iCCP_SUPPORTED
975 #ifndef PNG_NO_WRITE_iTXt
976 # ifndef PNG_WRITE_iTXt_SUPPORTED
977 # define PNG_WRITE_iTXt_SUPPORTED
979 # ifndef PNG_iTXt_SUPPORTED
980 # define PNG_iTXt_SUPPORTED
983 #ifndef PNG_NO_WRITE_oFFs
984 # define PNG_WRITE_oFFs_SUPPORTED
985 # ifndef PNG_oFFs_SUPPORTED
986 # define PNG_oFFs_SUPPORTED
989 #ifndef PNG_NO_WRITE_pCAL
990 # define PNG_WRITE_pCAL_SUPPORTED
991 # ifndef PNG_pCAL_SUPPORTED
992 # define PNG_pCAL_SUPPORTED
995 #ifndef PNG_NO_WRITE_sCAL
996 # define PNG_WRITE_sCAL_SUPPORTED
997 # ifndef PNG_sCAL_SUPPORTED
998 # define PNG_sCAL_SUPPORTED
1001 #ifndef PNG_NO_WRITE_pHYs
1002 # define PNG_WRITE_pHYs_SUPPORTED
1003 # ifndef PNG_pHYs_SUPPORTED
1004 # define PNG_pHYs_SUPPORTED
1007 #ifndef PNG_NO_WRITE_sBIT
1008 # define PNG_WRITE_sBIT_SUPPORTED
1009 # ifndef PNG_sBIT_SUPPORTED
1010 # define PNG_sBIT_SUPPORTED
1013 #ifndef PNG_NO_WRITE_sPLT
1014 # define PNG_WRITE_sPLT_SUPPORTED
1015 # ifndef PNG_sPLT_SUPPORTED
1016 # define PNG_sPLT_SUPPORTED
1019 #ifndef PNG_NO_WRITE_sRGB
1020 # define PNG_WRITE_sRGB_SUPPORTED
1021 # ifndef PNG_sRGB_SUPPORTED
1022 # define PNG_sRGB_SUPPORTED
1025 #ifndef PNG_NO_WRITE_tEXt
1026 # define PNG_WRITE_tEXt_SUPPORTED
1027 # ifndef PNG_tEXt_SUPPORTED
1028 # define PNG_tEXt_SUPPORTED
1031 #ifndef PNG_NO_WRITE_tIME
1032 # define PNG_WRITE_tIME_SUPPORTED
1033 # ifndef PNG_tIME_SUPPORTED
1034 # define PNG_tIME_SUPPORTED
1037 #ifndef PNG_NO_WRITE_tRNS
1038 # define PNG_WRITE_tRNS_SUPPORTED
1039 # ifndef PNG_tRNS_SUPPORTED
1040 # define PNG_tRNS_SUPPORTED
1043 #ifndef PNG_NO_WRITE_zTXt
1044 # define PNG_WRITE_zTXt_SUPPORTED
1045 # ifndef PNG_zTXt_SUPPORTED
1046 # define PNG_zTXt_SUPPORTED
1049 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1050 defined(PNG_WRITE_zTXt_SUPPORTED)
1051 # define PNG_WRITE_TEXT_SUPPORTED
1052 # ifndef PNG_TEXT_SUPPORTED
1053 # define PNG_TEXT_SUPPORTED
1057 #ifdef PNG_WRITE_tIME_SUPPORTED
1058 # ifndef PNG_NO_CONVERT_tIME
1060 /* The "tm" structure is not supported on WindowsCE */
1061 # ifndef PNG_CONVERT_tIME_SUPPORTED
1062 # define PNG_CONVERT_tIME_SUPPORTED
1068 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1070 #ifndef PNG_NO_WRITE_FILTER
1071 # ifndef PNG_WRITE_FILTER_SUPPORTED
1072 # define PNG_WRITE_FILTER_SUPPORTED
1076 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1077 # define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1078 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1079 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
1082 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1083 # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1084 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1087 #endif /* PNG_WRITE_SUPPORTED */
1089 /* Turn this off to disable png_read_png() and
1090 * png_write_png() and leave the row_pointers member
1091 * out of the info structure.
1093 #ifndef PNG_NO_INFO_IMAGE
1094 # define PNG_INFO_IMAGE_SUPPORTED
1097 /* Need the time information for converting tIME chunks */
1098 #ifdef PNG_CONVERT_tIME_SUPPORTED
1099 /* "time.h" functions are not supported on WindowsCE */
1103 /* Some typedefs to get us started. These should be safe on most of the
1104 * common platforms. The typedefs should be at least as large as the
1105 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1106 * don't have to be exactly that size. Some compilers dislike passing
1107 * unsigned shorts as function parameters, so you may be better off using
1108 * unsigned int for png_uint_16.
1111 #if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)
1112 typedef unsigned int png_uint_32;
1113 typedef int png_int_32;
1115 typedef unsigned long png_uint_32;
1116 typedef long png_int_32;
1118 typedef unsigned short png_uint_16;
1119 typedef short png_int_16;
1120 typedef unsigned char png_byte;
1122 #ifdef PNG_NO_SIZE_T
1123 typedef unsigned int png_size_t;
1125 typedef size_t png_size_t;
1127 #define png_sizeof(x) (sizeof (x))
1129 /* The following is needed for medium model support. It cannot be in the
1130 * pngpriv.h header. Needs modification for other compilers besides
1131 * MSC. Model independent support declares all arrays and pointers to be
1132 * large using the far keyword. The zlib version used must also support
1133 * model independent data. As of version zlib 1.0.4, the necessary changes
1134 * have been made in zlib. The USE_FAR_KEYWORD define triggers other
1135 * changes that are needed. (Tim Wegner)
1138 /* Separate compiler dependencies (problem here is that zlib.h always
1139 * defines FAR. (SJT)
1142 # if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1147 /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
1148 # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1149 # define PNG_MAX_MALLOC_64K
1154 # define USE_FAR_KEYWORD
1155 # endif /* LDATA != 1 */
1156 /* Possibly useful for moving data out of default segment.
1157 * Uncomment it if you want. Could also define FARDATA as
1158 * const if your compiler supports it. (SJT)
1159 # define FARDATA FAR
1161 # endif /* __WIN32__, __FLAT__, __CYGWIN__ */
1162 #endif /* __BORLANDC__ */
1165 /* Suggest testing for specific compiler first before testing for
1166 * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1167 * making reliance oncertain keywords suspect. (SJT)
1170 /* MSC Medium model */
1173 # define USE_FAR_KEYWORD
1174 # define FARDATA FAR
1179 /* SJT: default case */
1184 /* At this point FAR is always defined */
1189 /* Typedef for floating-point numbers that are converted
1190 to fixed-point with a multiple of 100,000, e.g., int_gamma */
1191 typedef png_int_32 png_fixed_point;
1193 /* Add typedefs for pointers */
1194 typedef void FAR * png_voidp;
1195 typedef png_byte FAR * png_bytep;
1196 typedef png_uint_32 FAR * png_uint_32p;
1197 typedef png_int_32 FAR * png_int_32p;
1198 typedef png_uint_16 FAR * png_uint_16p;
1199 typedef png_int_16 FAR * png_int_16p;
1200 typedef PNG_CONST char FAR * png_const_charp;
1201 typedef char FAR * png_charp;
1202 typedef png_fixed_point FAR * png_fixed_point_p;
1204 #ifndef PNG_NO_STDIO
1205 typedef FILE * png_FILE_p;
1208 #ifdef PNG_FLOATING_POINT_SUPPORTED
1209 typedef double FAR * png_doublep;
1212 /* Pointers to pointers; i.e. arrays */
1213 typedef png_byte FAR * FAR * png_bytepp;
1214 typedef png_uint_32 FAR * FAR * png_uint_32pp;
1215 typedef png_int_32 FAR * FAR * png_int_32pp;
1216 typedef png_uint_16 FAR * FAR * png_uint_16pp;
1217 typedef png_int_16 FAR * FAR * png_int_16pp;
1218 typedef PNG_CONST char FAR * FAR * png_const_charpp;
1219 typedef char FAR * FAR * png_charpp;
1220 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1221 #ifdef PNG_FLOATING_POINT_SUPPORTED
1222 typedef double FAR * FAR * png_doublepp;
1225 /* Pointers to pointers to pointers; i.e., pointer to array */
1226 typedef char FAR * FAR * FAR * png_charppp;
1228 /* Define PNG_BUILD_DLL if the module being built is a Windows
1231 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1232 * It is equivalent to Microsoft predefined macro _DLL that is
1233 * automatically defined when you compile using the share
1234 * version of the CRT (C Run-Time library)
1236 * The cygwin mods make this behavior a little different:
1237 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1238 * Define PNG_STATIC if you are building a static library for use with cygwin,
1239 * -or- if you are building an application that you want to link to the
1241 * PNG_USE_DLL is defined by default (no user action needed) unless one of
1242 * the other flags is defined.
1245 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1249 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1250 * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1251 * Don't ignore those warnings; you must also reset the default calling
1252 * convention in your compiler to match your PNGAPI, and you must build
1253 * zlib and your applications the same way you build libpng.
1258 # define PNGAPI __cdecl
1269 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1270 # ifndef PNG_NO_MODULEDEF
1271 # define PNG_NO_MODULEDEF
1275 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1279 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1280 (( defined(_Windows) || defined(_WINDOWS) || \
1281 defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1284 # if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1285 # define PNGAPI __cdecl
1287 # define PNGAPI _cdecl
1291 # if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1292 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1298 # define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
1299 # define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
1301 /* Borland/Microsoft */
1302 # if defined(_MSC_VER) || defined(__BORLANDC__)
1303 # if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1304 # define PNG_EXPORT PNG_EXPORT_TYPE1
1306 # define PNG_EXPORT PNG_EXPORT_TYPE2
1307 # ifdef PNG_BUILD_DLL
1308 # define PNG_IMPEXP __export
1310 # define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in VC++ */
1311 # endif /* Exists in Borland C++ for
1312 C++ classes (== huge) */
1317 # ifdef PNG_BUILD_DLL
1318 # define PNG_IMPEXP __declspec(dllexport)
1320 # define PNG_IMPEXP __declspec(dllimport)
1323 # endif /* PNG_IMPEXP */
1324 #else /* !(DLL || non-cygwin WINDOWS) */
1325 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1327 # define PNGAPI _System
1330 # if 0 /* ... other platforms, with other meanings */
1342 #ifdef PNG_BUILDSYMS
1344 # define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1349 # define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1352 #define PNG_USE_LOCAL_ARRAYS /* Not used in libpng, defined for legacy apps */
1354 /* Support for compiler specific function attributes. These are used
1355 * so that where compiler support is available incorrect use of API
1356 * functions in png.h will generate compiler warnings.
1358 * Added at libpng-1.2.41.
1361 #ifndef PNG_NO_PEDANTIC_WARNINGS
1362 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
1363 # define PNG_PEDANTIC_WARNINGS_SUPPORTED
1367 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
1368 /* Support for compiler specific function attributes. These are used
1369 * so that where compiler support is available incorrect use of API
1370 * functions in png.h will generate compiler warnings. Added at libpng
1374 # ifndef PNG_USE_RESULT
1375 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
1377 # ifndef PNG_NORETURN
1378 # define PNG_NORETURN __attribute__((__noreturn__))
1380 # ifndef PNG_ALLOCATED
1381 # define PNG_ALLOCATED __attribute__((__malloc__))
1384 /* This specifically protects structure members that should only be
1385 * accessed from within the library, therefore should be empty during
1388 # ifndef PNG_DEPRECATED
1389 # define PNG_DEPRECATED __attribute__((__deprecated__))
1391 # ifndef PNG_DEPSTRUCT
1392 # define PNG_DEPSTRUCT __attribute__((__deprecated__))
1394 # ifndef PNG_PRIVATE
1395 # if 0 /* Doesn't work so we use deprecated instead*/
1396 # define PNG_PRIVATE \
1397 __attribute__((warning("This function is not exported by libpng.")))
1399 # define PNG_PRIVATE \
1400 __attribute__((__deprecated__))
1402 # endif /* PNG_PRIVATE */
1403 # endif /* __GNUC__ */
1404 #endif /* PNG_PEDANTIC_WARNINGS */
1406 #ifndef PNG_DEPRECATED
1407 # define PNG_DEPRECATED /* Use of this function is deprecated */
1409 #ifndef PNG_USE_RESULT
1410 # define PNG_USE_RESULT /* The result of this function must be checked */
1412 #ifndef PNG_NORETURN
1413 # define PNG_NORETURN /* This function does not return */
1415 #ifndef PNG_ALLOCATED
1416 # define PNG_ALLOCATED /* The result of the function is new memory */
1418 #ifndef PNG_DEPSTRUCT
1419 # define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
1422 # define PNG_PRIVATE /* This is a private libpng function */
1425 /* Users may want to use these so they are not private. Any library
1426 * functions that are passed far data must be model-independent.
1429 /* memory model/platform independent fns */
1431 # if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_))
1432 # define PNG_ABORT() ExitProcess(0)
1434 # define PNG_ABORT() abort()
1438 #ifdef USE_FAR_KEYWORD
1439 /* Use this to make far-to-near assignments */
1442 # define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
1443 # define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
1444 # define png_strcpy _fstrcpy
1445 # define png_strncpy _fstrncpy /* Added to v 1.2.6 */
1446 # define png_strlen _fstrlen
1447 # define png_memcmp _fmemcmp /* SJT: added */
1448 # define png_memcpy _fmemcpy
1449 # define png_memset _fmemset
1450 # define png_sprintf sprintf
1452 # if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_))
1453 # /* Favor Windows over C runtime fns */
1454 # define CVT_PTR(ptr) (ptr)
1455 # define CVT_PTR_NOCHECK(ptr) (ptr)
1456 # define png_strcpy lstrcpyA
1457 # define png_strncpy lstrcpynA
1458 # define png_strlen lstrlenA
1459 # define png_memcmp memcmp
1460 # define png_memcpy CopyMemory
1461 # define png_memset memset
1462 # define png_sprintf wsprintfA
1464 # define CVT_PTR(ptr) (ptr)
1465 # define CVT_PTR_NOCHECK(ptr) (ptr)
1466 # define png_strcpy strcpy
1467 # define png_strncpy strncpy /* Added to v 1.2.6 */
1468 # define png_strlen strlen
1469 # define png_memcmp memcmp /* SJT: added */
1470 # define png_memcpy memcpy
1471 # define png_memset memset
1472 # define png_sprintf sprintf
1476 #ifndef PNG_NO_SNPRINTF
1478 # define png_snprintf _snprintf /* Added to v 1.2.19 */
1479 # define png_snprintf2 _snprintf
1480 # define png_snprintf6 _snprintf
1482 # define png_snprintf snprintf /* Added to v 1.2.19 */
1483 # define png_snprintf2 snprintf
1484 # define png_snprintf6 snprintf
1487 /* You don't have or don't want to use snprintf(). Caution: Using
1488 * sprintf instead of snprintf exposes your application to accidental
1489 * or malevolent buffer overflows. If you don't have snprintf()
1490 * as a general rule you should provide one (you can get one from
1491 * Portable OpenSSH).
1493 # define png_snprintf(s1,n,fmt,x1) png_sprintf(s1,fmt,x1)
1494 # define png_snprintf2(s1,n,fmt,x1,x2) png_sprintf(s1,fmt,x1,x2)
1495 # define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
1496 png_sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
1499 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
1500 * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32
1501 * to png_alloc_size_t are not necessary; in fact, it is recommended
1502 * not to use them at all so that the compiler can complain when something
1503 * turns out to be problematic.
1504 * Casts in the other direction (from png_alloc_size_t to png_size_t or
1505 * png_uint_32) should be explicitly applied; however, we do not expect
1506 * to encounter practical situations that require such conversions.
1508 #if defined(__TURBOC__) && !defined(__FLAT__)
1509 typedef unsigned long png_alloc_size_t;
1511 # if defined(_MSC_VER) && defined(MAXSEG_64K)
1512 typedef unsigned long png_alloc_size_t;
1514 /* This is an attempt to detect an old Windows system where (int) is
1515 * actually 16 bits, in that case png_malloc must have an argument with a
1516 * bigger size to accomodate the requirements of the library.
1518 # if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \
1519 (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)
1520 typedef DWORD png_alloc_size_t;
1522 typedef png_size_t png_alloc_size_t;
1526 /* End of memory model/platform independent support */
1528 /* Just a little check that someone hasn't tried to define something
1531 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1532 # undef PNG_ZBUF_SIZE
1533 # define PNG_ZBUF_SIZE 65536L
1537 /* Added at libpng-1.2.8 */
1538 #endif /* PNG_VERSION_INFO_ONLY */
1540 #endif /* PNGCONF_H */