git.cworth.org Git - apitrace/blob - retrace/glstate.cpp

   1 /**************************************************************************
   2  *
   3  * Copyright 2011 Jose Fonseca
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  *
  24  **************************************************************************/
  25
  26
  27 #include <string.h>
  28
  29 #include <algorithm>
  30 #include <iostream>
  31
  32 #include "image.hpp"
  33 #include "json.hpp"
  34 #include "glproc.hpp"
  35 #include "glsize.hpp"
  36 #include "glstate.hpp"
  37 #include "glstate_internal.hpp"
  38
  39
  40 namespace glstate {
  41
  42
  43 Context::Context(void) {
  44     memset(this, 0, sizeof *this);
  45
  46     const char *version = (const char *)glGetString(GL_VERSION);
  47     if (version) {
  48         if (version[0] == 'O' &&
  49             version[1] == 'p' &&
  50             version[2] == 'e' &&
  51             version[3] == 'n' &&
  52             version[4] == 'G' &&
  53             version[5] == 'L' &&
  54             version[6] == ' ' &&
  55             version[7] == 'E' &&
  56             version[8] == 'S' &&
  57             (version[9] == ' ' || version[9] == '-')) {
  58             ES = true;
  59         }
  60     }
  61
  62     ARB_draw_buffers = !ES;
  63
  64     // TODO: Check extensions we use below
  65 }
  66
  67 void
  68 Context::resetPixelPackState(void) {
  69     if (!ES) {
  70         glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
  71         glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
  72         glPixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
  73         glPixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
  74         glPixelStorei(GL_PACK_ROW_LENGTH, 0);
  75         glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
  76         glPixelStorei(GL_PACK_SKIP_ROWS, 0);
  77         glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
  78         glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
  79     } else {
  80         packAlignment = 4;
  81         glGetIntegerv(GL_PACK_ALIGNMENT, &packAlignment);
  82     }
  83     glPixelStorei(GL_PACK_ALIGNMENT, 1);
  84 }
  85
  86 void
  87 Context::restorePixelPackState(void) {
  88     if (!ES) {
  89         glPopClientAttrib();
  90     } else {
  91         glPixelStorei(GL_PACK_ALIGNMENT, packAlignment);
  92     }
  93 }
  94
  95
  96 static const GLenum bindings[] = {
  97     GL_DRAW_BUFFER,
  98     GL_READ_BUFFER,
  99     GL_PIXEL_PACK_BUFFER_BINDING,
 100     GL_PIXEL_UNPACK_BUFFER_BINDING,
 101     GL_TEXTURE_BINDING_1D,
 102     GL_TEXTURE_BINDING_2D,
 103     GL_TEXTURE_BINDING_3D,
 104     GL_TEXTURE_BINDING_RECTANGLE,
 105     GL_TEXTURE_BINDING_CUBE_MAP,
 106     GL_DRAW_FRAMEBUFFER_BINDING,
 107     GL_READ_FRAMEBUFFER_BINDING,
 108     GL_RENDERBUFFER_BINDING,
 109     GL_DRAW_BUFFER0,
 110     GL_DRAW_BUFFER1,
 111     GL_DRAW_BUFFER2,
 112     GL_DRAW_BUFFER3,
 113     GL_DRAW_BUFFER4,
 114     GL_DRAW_BUFFER5,
 115     GL_DRAW_BUFFER6,
 116     GL_DRAW_BUFFER7,
 117 };
 118
 119
 120 #define NUM_BINDINGS sizeof(bindings)/sizeof(bindings[0])
 121
 122
 123 void dumpCurrentContext(std::ostream &os)
 124 {
 125     JSONWriter json(os);
 126
 127 #ifndef NDEBUG
 128     GLint old_bindings[NUM_BINDINGS];
 129     for (unsigned i = 0; i < NUM_BINDINGS; ++i) {
 130         old_bindings[i] = 0;
 131         glGetIntegerv(bindings[i], &old_bindings[i]);
 132     }
 133 #endif
 134
 135     Context context;
 136
 137     dumpParameters(json, context);
 138     dumpShadersUniforms(json, context);
 139     dumpTextures(json, context);
 140     dumpFramebuffer(json, context);
 141
 142 #ifndef NDEBUG
 143     for (unsigned i = 0; i < NUM_BINDINGS; ++i) {
 144         GLint new_binding = 0;
 145         glGetIntegerv(bindings[i], &new_binding);
 146         if (new_binding != old_bindings[i]) {
 147             std::cerr << "warning: " << enumToString(bindings[i]) << " was clobbered\n";
 148         }
 149     }
 150 #endif
 151
 152 }
 153
 154
 155 } /* namespace glstate */