git.cworth.org Git - apitrace/blob - 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 #include <map>
  32 #include <sstream>
  33
  34 #include "image.hpp"
  35 #include "json.hpp"
  36 #include "glproc.hpp"
  37 #include "glsize.hpp"
  38 #include "glstate.hpp"
  39
  40
  41 #ifdef __APPLE__
  42
  43 #include <Carbon/Carbon.h>
  44
  45 #ifdef __cplusplus
  46 extern "C" {
  47 #endif
  48
  49 OSStatus CGSGetSurfaceBounds(CGSConnectionID, CGWindowID, CGSSurfaceID, CGRect *);
  50
  51 #ifdef __cplusplus
  52 }
  53 #endif
  54
  55 #endif /* __APPLE__ */
  56
  57
  58 namespace glstate {
  59
  60
  61 static inline void
  62 resetPixelPackState(void) {
  63     glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
  64     glPixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
  65     glPixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
  66     glPixelStorei(GL_PACK_ROW_LENGTH, 0);
  67     glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
  68     glPixelStorei(GL_PACK_SKIP_ROWS, 0);
  69     glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
  70     glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
  71     glPixelStorei(GL_PACK_ALIGNMENT, 1);
  72     glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
  73 }
  74
  75
  76 static inline void
  77 restorePixelPackState(void) {
  78     glPopClientAttrib();
  79 }
  80
  81
  82 // Mapping from shader type to shader source, used to accumulated the sources
  83 // of different shaders with same type.
  84 typedef std::map<std::string, std::string> ShaderMap;
  85
  86
  87 static void
  88 getShaderSource(ShaderMap &shaderMap, GLuint shader)
  89 {
  90     if (!shader) {
  91         return;
  92     }
  93
  94     GLint shader_type = 0;
  95     glGetShaderiv(shader, GL_SHADER_TYPE, &shader_type);
  96     if (!shader_type) {
  97         return;
  98     }
  99
 100     GLint source_length = 0;
 101     glGetShaderiv(shader, GL_SHADER_SOURCE_LENGTH, &source_length);
 102     if (!source_length) {
 103         return;
 104     }
 105
 106     GLchar *source = new GLchar[source_length];
 107     GLsizei length = 0;
 108     source[0] = 0;
 109     glGetShaderSource(shader, source_length, &length, source);
 110
 111     shaderMap[enumToString(shader_type)] += source;
 112
 113     delete [] source;
 114 }
 115
 116
 117 static void
 118 getShaderObjSource(ShaderMap &shaderMap, GLhandleARB shaderObj)
 119 {
 120     if (!shaderObj) {
 121         return;
 122     }
 123
 124     GLint shader_type = 0;
 125     glGetObjectParameterivARB(shaderObj, GL_OBJECT_TYPE_ARB, &shader_type);
 126     if (!shader_type) {
 127         return;
 128     }
 129
 130     GLint source_length = 0;
 131     glGetObjectParameterivARB(shaderObj, GL_OBJECT_SHADER_SOURCE_LENGTH_ARB, &source_length);
 132     if (!source_length) {
 133         return;
 134     }
 135
 136     GLcharARB *source = new GLcharARB[source_length];
 137     GLsizei length = 0;
 138     source[0] = 0;
 139     glGetShaderSource(shaderObj, source_length, &length, source);
 140
 141     shaderMap[enumToString(shader_type)] += source;
 142
 143     delete [] source;
 144 }
 145
 146
 147 static inline void
 148 dumpCurrentProgram(JSONWriter &json)
 149 {
 150     GLint program = 0;
 151     glGetIntegerv(GL_CURRENT_PROGRAM, &program);
 152     if (!program) {
 153         return;
 154     }
 155
 156     GLint attached_shaders = 0;
 157     glGetProgramiv(program, GL_ATTACHED_SHADERS, &attached_shaders);
 158     if (!attached_shaders) {
 159         return;
 160     }
 161
 162     ShaderMap shaderMap;
 163
 164     GLuint *shaders = new GLuint[attached_shaders];
 165     GLsizei count = 0;
 166     glGetAttachedShaders(program, attached_shaders, &count, shaders);
 167     std::sort(shaders, shaders + count);
 168     for (GLsizei i = 0; i < count; ++ i) {
 169        getShaderSource(shaderMap, shaders[i]);
 170     }
 171     delete [] shaders;
 172
 173     for (ShaderMap::const_iterator it = shaderMap.begin(); it != shaderMap.end(); ++it) {
 174         json.beginMember(it->first);
 175         json.writeString(it->second);
 176         json.endMember();
 177     }
 178 }
 179
 180
 181 static inline void
 182 dumpCurrentProgramObj(JSONWriter &json)
 183 {
 184     GLhandleARB programObj = glGetHandleARB(GL_PROGRAM_OBJECT_ARB);
 185     if (!programObj) {
 186         return;
 187     }
 188
 189     GLint attached_shaders = 0;
 190     glGetObjectParameterivARB(programObj, GL_OBJECT_ATTACHED_OBJECTS_ARB, &attached_shaders);
 191     if (!attached_shaders) {
 192         return;
 193     }
 194
 195     ShaderMap shaderMap;
 196
 197     GLhandleARB *shaderObjs = new GLhandleARB[attached_shaders];
 198     GLsizei count = 0;
 199     glGetAttachedObjectsARB(programObj, attached_shaders, &count, shaderObjs);
 200     std::sort(shaderObjs, shaderObjs + count);
 201     for (GLsizei i = 0; i < count; ++ i) {
 202        getShaderObjSource(shaderMap, shaderObjs[i]);
 203     }
 204     delete [] shaderObjs;
 205
 206     for (ShaderMap::const_iterator it = shaderMap.begin(); it != shaderMap.end(); ++it) {
 207         json.beginMember(it->first);
 208         json.writeString(it->second);
 209         json.endMember();
 210     }
 211 }
 212
 213
 214 static void
 215 dumpUniform(JSONWriter &json, GLint program, GLint size, GLenum type, const GLchar *name) {
 216
 217     GLenum elemType;
 218     GLint numElems;
 219     __gl_uniform_size(type, elemType, numElems);
 220     if (elemType == GL_NONE) {
 221         return;
 222     }
 223
 224     GLfloat fvalues[4*4];
 225     GLdouble dvalues[4*4];
 226     GLint ivalues[4*4];
 227     GLuint uivalues[4*4];
 228
 229     GLint i, j;
 230
 231     for (i = 0; i < size; ++i) {
 232         std::stringstream ss;
 233         ss << name;
 234
 235         if (size > 1) {
 236             ss << '[' << i << ']';
 237         }
 238
 239         std::string elemName = ss.str();
 240
 241         json.beginMember(elemName);
 242
 243         GLint location = glGetUniformLocation(program, elemName.c_str());
 244
 245         if (numElems > 1) {
 246             json.beginArray();
 247         }
 248
 249         switch (elemType) {
 250         case GL_FLOAT:
 251             glGetUniformfv(program, location, fvalues);
 252             for (j = 0; j < numElems; ++j) {
 253                 json.writeNumber(fvalues[j]);
 254             }
 255             break;
 256         case GL_DOUBLE:
 257             glGetUniformdv(program, location, dvalues);
 258             for (j = 0; j < numElems; ++j) {
 259                 json.writeNumber(dvalues[j]);
 260             }
 261             break;
 262         case GL_INT:
 263             glGetUniformiv(program, location, ivalues);
 264             for (j = 0; j < numElems; ++j) {
 265                 json.writeNumber(ivalues[j]);
 266             }
 267             break;
 268         case GL_UNSIGNED_INT:
 269             glGetUniformuiv(program, location, uivalues);
 270             for (j = 0; j < numElems; ++j) {
 271                 json.writeNumber(uivalues[j]);
 272             }
 273             break;
 274         case GL_BOOL:
 275             glGetUniformiv(program, location, ivalues);
 276             for (j = 0; j < numElems; ++j) {
 277                 json.writeBool(ivalues[j]);
 278             }
 279             break;
 280         default:
 281             assert(0);
 282             break;
 283         }
 284
 285         if (numElems > 1) {
 286             json.endArray();
 287         }
 288
 289         json.endMember();
 290     }
 291 }
 292
 293
 294 static void
 295 dumpUniformARB(JSONWriter &json, GLhandleARB programObj, GLint size, GLenum type, const GLchar *name) {
 296
 297     GLenum elemType;
 298     GLint numElems;
 299     __gl_uniform_size(type, elemType, numElems);
 300     if (elemType == GL_NONE) {
 301         return;
 302     }
 303
 304     GLfloat fvalues[4*4];
 305     GLint ivalues[4*4];
 306
 307     GLint i, j;
 308
 309     for (i = 0; i < size; ++i) {
 310         std::stringstream ss;
 311         ss << name;
 312
 313         if (size > 1) {
 314             ss << '[' << i << ']';
 315         }
 316
 317         std::string elemName = ss.str();
 318
 319         json.beginMember(elemName);
 320
 321         GLint location = glGetUniformLocationARB(programObj, elemName.c_str());
 322
 323         if (numElems > 1) {
 324             json.beginArray();
 325         }
 326
 327         switch (elemType) {
 328         case GL_DOUBLE:
 329             // glGetUniformdvARB does not exists
 330         case GL_FLOAT:
 331             glGetUniformfvARB(programObj, location, fvalues);
 332             for (j = 0; j < numElems; ++j) {
 333                 json.writeNumber(fvalues[j]);
 334             }
 335             break;
 336         case GL_UNSIGNED_INT:
 337             // glGetUniformuivARB does not exists
 338         case GL_INT:
 339             glGetUniformivARB(programObj, location, ivalues);
 340             for (j = 0; j < numElems; ++j) {
 341                 json.writeNumber(ivalues[j]);
 342             }
 343             break;
 344         case GL_BOOL:
 345             glGetUniformivARB(programObj, location, ivalues);
 346             for (j = 0; j < numElems; ++j) {
 347                 json.writeBool(ivalues[j]);
 348             }
 349             break;
 350         default:
 351             assert(0);
 352             break;
 353         }
 354
 355         if (numElems > 1) {
 356             json.endArray();
 357         }
 358
 359         json.endMember();
 360     }
 361 }
 362
 363
 364 static inline void
 365 dumpCurrentProgramUniforms(JSONWriter &json)
 366 {
 367     GLint program = 0;
 368     glGetIntegerv(GL_CURRENT_PROGRAM, &program);
 369     if (!program) {
 370         return;
 371     }
 372
 373     GLint active_uniforms = 0;
 374     glGetProgramiv(program, GL_ACTIVE_UNIFORMS, &active_uniforms);
 375     if (!active_uniforms) {
 376         return;
 377     }
 378
 379     GLint active_uniform_max_length = 0;
 380     glGetProgramiv(program, GL_ACTIVE_UNIFORM_MAX_LENGTH, &active_uniform_max_length);
 381     GLchar *name = new GLchar[active_uniform_max_length];
 382     if (!name) {
 383         return;
 384     }
 385
 386     for (GLint index = 0; index < active_uniforms; ++index) {
 387         GLsizei length = 0;
 388         GLint size = 0;
 389         GLenum type = GL_NONE;
 390         glGetActiveUniform(program, index, active_uniform_max_length, &length, &size, &type, name);
 391
 392         dumpUniform(json, program, size, type, name);
 393     }
 394
 395     delete [] name;
 396 }
 397
 398
 399 static inline void
 400 dumpCurrentProgramUniformsARB(JSONWriter &json)
 401 {
 402     GLhandleARB programObj = glGetHandleARB(GL_PROGRAM_OBJECT_ARB);
 403     if (!programObj) {
 404         return;
 405     }
 406
 407     GLint active_uniforms = 0;
 408     glGetObjectParameterivARB(programObj, GL_OBJECT_ACTIVE_UNIFORMS_ARB, &active_uniforms);
 409     if (!active_uniforms) {
 410         return;
 411     }
 412
 413     GLint active_uniform_max_length = 0;
 414     glGetObjectParameterivARB(programObj, GL_OBJECT_ACTIVE_UNIFORM_MAX_LENGTH_ARB, &active_uniform_max_length);
 415     GLchar *name = new GLchar[active_uniform_max_length];
 416     if (!name) {
 417         return;
 418     }
 419
 420     for (GLint index = 0; index < active_uniforms; ++index) {
 421         GLsizei length = 0;
 422         GLint size = 0;
 423         GLenum type = GL_NONE;
 424         glGetActiveUniformARB(programObj, index, active_uniform_max_length, &length, &size, &type, name);
 425
 426         dumpUniformARB(json, programObj, size, type, name);
 427     }
 428
 429     delete [] name;
 430 }
 431
 432
 433 static inline void
 434 dumpArbProgram(JSONWriter &json, GLenum target)
 435 {
 436     if (!glIsEnabled(target)) {
 437         return;
 438     }
 439
 440     GLint program_length = 0;
 441     glGetProgramivARB(target, GL_PROGRAM_LENGTH_ARB, &program_length);
 442     if (!program_length) {
 443         return;
 444     }
 445
 446     GLchar *source = new GLchar[program_length + 1];
 447     source[0] = 0;
 448     glGetProgramStringARB(target, GL_PROGRAM_STRING_ARB, source);
 449     source[program_length] = 0;
 450
 451     json.beginMember(enumToString(target));
 452     json.writeString(source);
 453     json.endMember();
 454
 455     delete [] source;
 456 }
 457
 458
 459 static inline void
 460 dumpShaders(JSONWriter &json)
 461 {
 462     json.beginMember("shaders");
 463     json.beginObject();
 464     dumpCurrentProgram(json);
 465     dumpCurrentProgramObj(json);
 466     dumpArbProgram(json, GL_FRAGMENT_PROGRAM_ARB);
 467     dumpArbProgram(json, GL_VERTEX_PROGRAM_ARB);
 468     json.endObject();
 469     json.endMember(); // shaders
 470 }
 471
 472
 473 static inline void
 474 dumpUniforms(JSONWriter &json)
 475 {
 476     json.beginMember("uniforms");
 477     json.beginObject();
 478     dumpCurrentProgramUniforms(json);
 479     dumpCurrentProgramUniformsARB(json);
 480     json.endObject();
 481     json.endMember(); // uniforms
 482 }
 483
 484
 485 static inline void
 486 dumpTextureImage(JSONWriter &json, GLenum target, GLint level)
 487 {
 488     GLint width, height = 1, depth = 1;
 489
 490     width = 0;
 491     glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
 492
 493     if (target != GL_TEXTURE_1D) {
 494         height = 0;
 495         glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
 496         if (target == GL_TEXTURE_3D) {
 497             depth = 0;
 498             glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);
 499         }
 500     }
 501
 502     if (width <= 0 || height <= 0 || depth <= 0) {
 503         return;
 504     } else {
 505         char label[512];
 506
 507         GLint active_texture = GL_TEXTURE0;
 508         glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
 509         snprintf(label, sizeof label, "%s, %s, level = %i", enumToString(active_texture), enumToString(target), level);
 510
 511         json.beginMember(label);
 512
 513         json.beginObject();
 514
 515         // Tell the GUI this is no ordinary object, but an image
 516         json.writeStringMember("__class__", "image");
 517
 518         json.writeNumberMember("__width__", width);
 519         json.writeNumberMember("__height__", height);
 520         json.writeNumberMember("__depth__", depth);
 521
 522         // Hardcoded for now, but we could chose types more adequate to the
 523         // texture internal format
 524         json.writeStringMember("__type__", "uint8");
 525         json.writeBoolMember("__normalized__", true);
 526         json.writeNumberMember("__channels__", 4);
 527
 528         GLubyte *pixels = new GLubyte[depth*width*height*4];
 529
 530         resetPixelPackState();
 531
 532         glGetTexImage(target, level, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 533
 534         restorePixelPackState();
 535
 536         json.beginMember("__data__");
 537         char *pngBuffer;
 538         int pngBufferSize;
 539         Image::writePixelsToBuffer(pixels, width, height, 4, false, &pngBuffer, &pngBufferSize);
 540         json.writeBase64(pngBuffer, pngBufferSize);
 541         free(pngBuffer);
 542         json.endMember(); // __data__
 543
 544         delete [] pixels;
 545         json.endObject();
 546     }
 547 }
 548
 549
 550 static inline void
 551 dumpTexture(JSONWriter &json, GLenum target, GLenum binding)
 552 {
 553     GLint texture_binding = 0;
 554     glGetIntegerv(binding, &texture_binding);
 555     if (!glIsEnabled(target) && !texture_binding) {
 556         return;
 557     }
 558
 559     GLint level = 0;
 560     do {
 561         GLint width = 0, height = 0;
 562         glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
 563         glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
 564         if (!width || !height) {
 565             break;
 566         }
 567
 568         if (target == GL_TEXTURE_CUBE_MAP) {
 569             for (int face = 0; face < 6; ++face) {
 570                 dumpTextureImage(json, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, level);
 571             }
 572         } else {
 573             dumpTextureImage(json, target, level);
 574         }
 575
 576         ++level;
 577     } while(true);
 578 }
 579
 580
 581 static inline void
 582 dumpTextures(JSONWriter &json)
 583 {
 584     json.beginMember("textures");
 585     json.beginObject();
 586     GLint active_texture = GL_TEXTURE0;
 587     glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
 588     GLint max_texture_coords = 0;
 589     glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);
 590     GLint max_combined_texture_image_units = 0;
 591     glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);
 592     GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);
 593     for (GLint unit = 0; unit < max_units; ++unit) {
 594         GLenum texture = GL_TEXTURE0 + unit;
 595         glActiveTexture(texture);
 596         dumpTexture(json, GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D);
 597         dumpTexture(json, GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D);
 598         dumpTexture(json, GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D);
 599         dumpTexture(json, GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE);
 600         dumpTexture(json, GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP);
 601     }
 602     glActiveTexture(active_texture);
 603     json.endObject();
 604     json.endMember(); // textures
 605 }
 606
 607
 608 static bool
 609 getDrawableBounds(GLint *width, GLint *height) {
 610 #if defined(_WIN32)
 611
 612     HDC hDC = wglGetCurrentDC();
 613     if (!hDC) {
 614         return false;
 615     }
 616
 617     HWND hWnd = WindowFromDC(hDC);
 618     RECT rect;
 619
 620     if (!GetClientRect(hWnd, &rect)) {
 621        return false;
 622     }
 623
 624     *width  = rect.right  - rect.left;
 625     *height = rect.bottom - rect.top;
 626
 627 #elif defined(__APPLE__)
 628
 629     CGLContextObj ctx = CGLGetCurrentContext();
 630     if (ctx == NULL) {
 631         return false;
 632     }
 633
 634     CGSConnectionID cid;
 635     CGSWindowID wid;
 636     CGSSurfaceID sid;
 637
 638     if (CGLGetSurface(ctx, &cid, &wid, &sid) != kCGLNoError) {
 639         return false;
 640     }
 641
 642     CGRect rect;
 643
 644     if (CGSGetSurfaceBounds(cid, wid, sid, &rect) != 0) {
 645         return false;
 646     }
 647
 648     *width = rect.size.width;
 649     *height = rect.size.height;
 650
 651 #else
 652
 653     Display *display;
 654     Drawable drawable;
 655     Window root;
 656     int x, y;
 657     unsigned int w, h, bw, depth;
 658
 659     display = glXGetCurrentDisplay();
 660     if (!display) {
 661         return false;
 662     }
 663
 664     drawable = glXGetCurrentDrawable();
 665     if (drawable == None) {
 666         return false;
 667     }
 668
 669     if (!XGetGeometry(display, drawable, &root, &x, &y, &w, &h, &bw, &depth)) {
 670         return false;
 671     }
 672
 673     *width = w;
 674     *height = h;
 675
 676 #endif
 677
 678     return true;
 679 }
 680
 681
 682 static const GLenum texture_bindings[][2] = {
 683     {GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D},
 684     {GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D},
 685     {GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D},
 686     {GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE},
 687     {GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP}
 688 };
 689
 690
 691 static bool
 692 bindTexture(GLint texture, GLenum &target, GLint &bound_texture)
 693 {
 694
 695     for (unsigned i = 0; i < sizeof(texture_bindings)/sizeof(texture_bindings[0]); ++i) {
 696         target  = texture_bindings[i][0];
 697
 698         GLenum binding = texture_bindings[i][1];
 699
 700         while (glGetError() != GL_NO_ERROR)
 701             ;
 702
 703         glGetIntegerv(binding, &bound_texture);
 704         glBindTexture(target, texture);
 705
 706         if (glGetError() == GL_NO_ERROR) {
 707             return true;
 708         }
 709
 710         glBindTexture(target, bound_texture);
 711     }
 712
 713     target = GL_NONE;
 714
 715     return false;
 716 }
 717
 718
 719 static bool
 720 getTextureLevelSize(GLint texture, GLint level, GLint *width, GLint *height)
 721 {
 722     *width = 0;
 723     *height = 0;
 724
 725     GLenum target;
 726     GLint bound_texture = 0;
 727     if (!bindTexture(texture, target, bound_texture)) {
 728         return false;
 729     }
 730
 731     glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, width);
 732     glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, height);
 733
 734     glBindTexture(target, bound_texture);
 735
 736     return *width > 0 && *height > 0;
 737 }
 738
 739
 740 static bool
 741 getRenderbufferSize(GLint renderbuffer, GLint *width, GLint *height)
 742 {
 743     GLint bound_renderbuffer = 0;
 744     glGetIntegerv(GL_RENDERBUFFER_BINDING, &bound_renderbuffer);
 745     glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
 746
 747     *width = 0;
 748     *height = 0;
 749     glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, width);
 750     glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, height);
 751
 752     glBindRenderbuffer(GL_RENDERBUFFER, bound_renderbuffer);
 753
 754     return *width > 0 && *height > 0;
 755 }
 756
 757
 758 static bool
 759 getFramebufferAttachmentSize(GLenum target, GLenum attachment, GLint *width, GLint *height)
 760 {
 761     GLint object_type = GL_NONE;
 762     glGetFramebufferAttachmentParameteriv(target, attachment,
 763                                           GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE,
 764                                           &object_type);
 765     if (object_type == GL_NONE) {
 766         return false;
 767     }
 768
 769     GLint object_name = 0;
 770     glGetFramebufferAttachmentParameteriv(target, attachment,
 771                                           GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
 772                                           &object_name);
 773     if (object_name == 0) {
 774         return false;
 775     }
 776
 777     if (object_type == GL_RENDERBUFFER) {
 778         return getRenderbufferSize(object_name, width, height);
 779     } else if (object_type == GL_TEXTURE) {
 780         GLint texture_level = 0;
 781         glGetFramebufferAttachmentParameteriv(target, attachment,
 782                                               GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL,
 783                                               &texture_level);
 784         return getTextureLevelSize(object_name, texture_level, width, height);
 785     } else {
 786         std::cerr << "warning: unexpected GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE = " << object_type << "\n";
 787         return false;
 788     }
 789 }
 790
 791
 792 Image::Image *
 793 getDrawBufferImage(GLenum format) {
 794     GLint channels = __gl_format_channels(format);
 795     if (channels > 4) {
 796         return NULL;
 797     }
 798
 799     GLint draw_framebuffer = 0;
 800     glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &draw_framebuffer);
 801
 802     GLint draw_buffer = GL_NONE;
 803     GLint width, height;
 804     if (draw_framebuffer) {
 805         glGetIntegerv(GL_DRAW_BUFFER0, &draw_buffer);
 806         if (draw_buffer == GL_NONE) {
 807             return NULL;
 808         }
 809
 810         if (!getFramebufferAttachmentSize(GL_DRAW_FRAMEBUFFER, draw_buffer, &width, &height)) {
 811             return NULL;
 812         }
 813     } else {
 814         glGetIntegerv(GL_DRAW_BUFFER, &draw_buffer);
 815         if (draw_buffer == GL_NONE) {
 816             return NULL;
 817         }
 818
 819         if (!getDrawableBounds(&width, &height)) {
 820             return NULL;
 821         }
 822     }
 823
 824     Image::Image *image = new Image::Image(width, height, channels, true);
 825     if (!image) {
 826         return NULL;
 827     }
 828
 829     while (glGetError() != GL_NO_ERROR) {}
 830
 831     GLint read_framebuffer = 0;
 832     glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_framebuffer);
 833     glBindFramebuffer(GL_READ_FRAMEBUFFER, draw_framebuffer);
 834
 835     GLint read_buffer = 0;
 836     glGetIntegerv(GL_READ_BUFFER, &read_buffer);
 837     glReadBuffer(draw_buffer);
 838
 839     // TODO: reset imaging state too
 840     resetPixelPackState();
 841
 842     glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, image->pixels);
 843
 844     restorePixelPackState();
 845     glReadBuffer(read_buffer);
 846     glBindFramebuffer(GL_READ_FRAMEBUFFER, read_framebuffer);
 847
 848     GLenum error = glGetError();
 849     if (error != GL_NO_ERROR) {
 850         do {
 851             std::cerr << "warning: " << enumToString(error) << " while getting snapshot\n";
 852             error = glGetError();
 853         } while(error != GL_NO_ERROR);
 854         delete image;
 855         return NULL;
 856     }
 857
 858     return image;
 859 }
 860
 861
 862 /**
 863  * Dump the image of the currently bound read buffer.
 864  */
 865 static inline void
 866 dumpReadBufferImage(JSONWriter &json, GLint width, GLint height, GLenum format)
 867 {
 868     GLint channels = __gl_format_channels(format);
 869
 870     json.beginObject();
 871
 872     // Tell the GUI this is no ordinary object, but an image
 873     json.writeStringMember("__class__", "image");
 874
 875     json.writeNumberMember("__width__", width);
 876     json.writeNumberMember("__height__", height);
 877     json.writeNumberMember("__depth__", 1);
 878
 879     // Hardcoded for now, but we could chose types more adequate to the
 880     // texture internal format
 881     json.writeStringMember("__type__", "uint8");
 882     json.writeBoolMember("__normalized__", true);
 883     json.writeNumberMember("__channels__", channels);
 884
 885     GLubyte *pixels = new GLubyte[width*height*channels];
 886
 887     // TODO: reset imaging state too
 888     resetPixelPackState();
 889
 890     glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, pixels);
 891
 892     restorePixelPackState();
 893
 894     json.beginMember("__data__");
 895     char *pngBuffer;
 896     int pngBufferSize;
 897     Image::writePixelsToBuffer(pixels, width, height, channels, false, &pngBuffer, &pngBufferSize);
 898     //std::cerr <<" Before = "<<(width * height * channels * sizeof *pixels)
 899     //          <<", after = "<<pngBufferSize << ", ratio = " << double(width * height * channels * sizeof *pixels)/pngBufferSize;
 900     json.writeBase64(pngBuffer, pngBufferSize);
 901     free(pngBuffer);
 902     json.endMember(); // __data__
 903
 904     delete [] pixels;
 905     json.endObject();
 906 }
 907
 908
 909 static inline GLuint
 910 downsampledFramebuffer(GLuint oldFbo, GLint drawbuffer,
 911                        GLint colorRb, GLint depthRb, GLint stencilRb,
 912                        GLuint *rbs, GLint *numRbs)
 913 {
 914     GLuint fbo;
 915     GLint format;
 916     GLint w, h;
 917
 918     *numRbs = 0;
 919
 920     glGenFramebuffers(1, &fbo);
 921     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 922
 923     glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
 924     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 925                                  GL_RENDERBUFFER_WIDTH, &w);
 926     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 927                                  GL_RENDERBUFFER_HEIGHT, &h);
 928     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 929                                  GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 930
 931     glGenRenderbuffers(1, &rbs[*numRbs]);
 932     glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 933     glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 934     glFramebufferRenderbuffer(GL_FRAMEBUFFER, drawbuffer,
 935                               GL_RENDERBUFFER, rbs[*numRbs]);
 936
 937     glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 938     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 939     glDrawBuffer(drawbuffer);
 940     glReadBuffer(drawbuffer);
 941     glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 942                       GL_COLOR_BUFFER_BIT, GL_NEAREST);
 943     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 944     ++*numRbs;
 945
 946     if (stencilRb == depthRb && stencilRb) {
 947         //combined depth and stencil buffer
 948         glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
 949         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 950                                      GL_RENDERBUFFER_WIDTH, &w);
 951         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 952                                      GL_RENDERBUFFER_HEIGHT, &h);
 953         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 954                                      GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 955
 956         glGenRenderbuffers(1, &rbs[*numRbs]);
 957         glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 958         glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 959         glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
 960                                   GL_RENDERBUFFER, rbs[*numRbs]);
 961         glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 962         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 963         glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 964                           GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
 965         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 966         ++*numRbs;
 967     } else {
 968         if (depthRb) {
 969             glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
 970             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 971                                          GL_RENDERBUFFER_WIDTH, &w);
 972             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 973                                          GL_RENDERBUFFER_HEIGHT, &h);
 974             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 975                                          GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 976
 977             glGenRenderbuffers(1, &rbs[*numRbs]);
 978             glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 979             glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 980             glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 981                                       GL_DEPTH_ATTACHMENT,
 982                                       GL_RENDERBUFFER, rbs[*numRbs]);
 983             glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 984             glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 985             glDrawBuffer(GL_DEPTH_ATTACHMENT);
 986             glReadBuffer(GL_DEPTH_ATTACHMENT);
 987             glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 988                               GL_DEPTH_BUFFER_BIT, GL_NEAREST);
 989             ++*numRbs;
 990         }
 991         if (stencilRb) {
 992             glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
 993             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 994                                          GL_RENDERBUFFER_WIDTH, &w);
 995             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 996                                          GL_RENDERBUFFER_HEIGHT, &h);
 997             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 998                                      GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 999
1000             glGenRenderbuffers(1, &rbs[*numRbs]);
1001             glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1002             glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1003             glFramebufferRenderbuffer(GL_FRAMEBUFFER,
1004                                       GL_STENCIL_ATTACHMENT,
1005                                       GL_RENDERBUFFER, rbs[*numRbs]);
1006             glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1007             glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1008             glDrawBuffer(GL_STENCIL_ATTACHMENT);
1009             glReadBuffer(GL_STENCIL_ATTACHMENT);
1010             glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1011                               GL_STENCIL_BUFFER_BIT, GL_NEAREST);
1012             ++*numRbs;
1013         }
1014     }
1015
1016     return fbo;
1017 }
1018
1019
1020 /**
1021  * Dump images of current draw drawable/window.
1022  */
1023 static void
1024 dumpDrawableImages(JSONWriter &json)
1025 {
1026     GLint width, height;
1027
1028     if (!getDrawableBounds(&width, &height)) {
1029         return;
1030     }
1031
1032     GLint draw_buffer = GL_NONE;
1033     glGetIntegerv(GL_DRAW_BUFFER, &draw_buffer);
1034     glReadBuffer(draw_buffer);
1035
1036     if (draw_buffer != GL_NONE) {
1037         GLint read_buffer = GL_NONE;
1038         glGetIntegerv(GL_READ_BUFFER, &read_buffer);
1039
1040         GLint alpha_bits = 0;
1041         glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
1042         GLenum format = alpha_bits ? GL_RGBA : GL_RGB;
1043         json.beginMember(enumToString(draw_buffer));
1044         dumpReadBufferImage(json, width, height, format);
1045         json.endMember();
1046
1047         glReadBuffer(read_buffer);
1048     }
1049
1050     GLint depth_bits = 0;
1051     glGetIntegerv(GL_DEPTH_BITS, &depth_bits);
1052     if (depth_bits) {
1053         json.beginMember("GL_DEPTH_COMPONENT");
1054         dumpReadBufferImage(json, width, height, GL_DEPTH_COMPONENT);
1055         json.endMember();
1056     }
1057
1058     GLint stencil_bits = 0;
1059     glGetIntegerv(GL_STENCIL_BITS, &stencil_bits);
1060     if (stencil_bits) {
1061         json.beginMember("GL_STENCIL_INDEX");
1062         dumpReadBufferImage(json, width, height, GL_STENCIL_INDEX);
1063         json.endMember();
1064     }
1065 }
1066 /**
1067  * Dump the specified framebuffer attachment.
1068  *
1069  * In the case of a color attachment, it assumes it is already bound for read.
1070  */
1071 static void
1072 dumpFramebufferAttachment(JSONWriter &json, GLenum target, GLenum attachment, GLenum format)
1073 {
1074     GLint width = 0, height = 0;
1075     if (!getFramebufferAttachmentSize(target, attachment, &width, &height)) {
1076         return;
1077     }
1078
1079     json.beginMember(enumToString(attachment));
1080     dumpReadBufferImage(json, width, height, format);
1081     json.endMember();
1082 }
1083
1084
1085 static void
1086 dumpFramebufferAttachments(JSONWriter &json, GLenum target)
1087 {
1088     GLint read_framebuffer = 0;
1089     glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_framebuffer);
1090
1091     GLint read_buffer = GL_NONE;
1092     glGetIntegerv(GL_READ_BUFFER, &read_buffer);
1093
1094     GLint max_draw_buffers = 1;
1095     glGetIntegerv(GL_MAX_DRAW_BUFFERS, &max_draw_buffers);
1096     GLint max_color_attachments = 0;
1097     glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, &max_color_attachments);
1098
1099     for (GLint i = 0; i < max_draw_buffers; ++i) {
1100         GLint draw_buffer = GL_NONE;
1101         glGetIntegerv(GL_DRAW_BUFFER0 + i, &draw_buffer);
1102         if (draw_buffer != GL_NONE) {
1103             glReadBuffer(draw_buffer);
1104             GLint attachment;
1105             if (draw_buffer >= GL_COLOR_ATTACHMENT0 && draw_buffer < GL_COLOR_ATTACHMENT0 + max_color_attachments) {
1106                 attachment = draw_buffer;
1107             } else {
1108                 std::cerr << "warning: unexpected GL_DRAW_BUFFER" << i << " = " << draw_buffer << "\n";
1109                 attachment = GL_COLOR_ATTACHMENT0;
1110             }
1111             GLint alpha_size = 0;
1112             glGetFramebufferAttachmentParameteriv(target, attachment,
1113                                                   GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE,
1114                                                   &alpha_size);
1115             GLenum format = alpha_size ? GL_RGBA : GL_RGB;
1116             dumpFramebufferAttachment(json, target, attachment, format);
1117         }
1118     }
1119
1120     glReadBuffer(read_buffer);
1121
1122     dumpFramebufferAttachment(json, target, GL_DEPTH_ATTACHMENT, GL_DEPTH_COMPONENT);
1123     dumpFramebufferAttachment(json, target, GL_STENCIL_ATTACHMENT, GL_STENCIL_INDEX);
1124
1125     glBindFramebuffer(GL_READ_FRAMEBUFFER, read_framebuffer);
1126 }
1127
1128
1129 static void
1130 dumpFramebuffer(JSONWriter &json)
1131 {
1132     json.beginMember("framebuffer");
1133     json.beginObject();
1134
1135     GLint boundDrawFbo = 0, boundReadFbo = 0;
1136     glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &boundDrawFbo);
1137     glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &boundReadFbo);
1138     if (!boundDrawFbo) {
1139         dumpDrawableImages(json);
1140     } else {
1141         GLint colorRb = 0, stencilRb = 0, depthRb = 0;
1142         GLint draw_buffer0 = GL_NONE;
1143         glGetIntegerv(GL_DRAW_BUFFER0, &draw_buffer0);
1144         bool multisample = false;
1145
1146         GLint boundRb = 0;
1147         glGetIntegerv(GL_RENDERBUFFER_BINDING, &boundRb);
1148
1149         GLint object_type;
1150         glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, draw_buffer0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1151         if (object_type == GL_RENDERBUFFER) {
1152             glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, draw_buffer0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &colorRb);
1153             glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
1154             GLint samples = 0;
1155             glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1156             if (samples) {
1157                 multisample = true;
1158             }
1159         }
1160
1161         glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1162         if (object_type == GL_RENDERBUFFER) {
1163             glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &depthRb);
1164             glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
1165             GLint samples = 0;
1166             glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1167             if (samples) {
1168                 multisample = true;
1169             }
1170         }
1171
1172         glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1173         if (object_type == GL_RENDERBUFFER) {
1174             glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &stencilRb);
1175             glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
1176             GLint samples = 0;
1177             glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1178             if (samples) {
1179                 multisample = true;
1180             }
1181         }
1182
1183         glBindRenderbuffer(GL_RENDERBUFFER, boundRb);
1184
1185         GLuint rbs[3];
1186         GLint numRbs = 0;
1187         GLuint fboCopy = 0;
1188
1189         if (multisample) {
1190             // glReadPixels doesnt support multisampled buffers so we need
1191             // to blit the fbo to a temporary one
1192             fboCopy = downsampledFramebuffer(boundDrawFbo, draw_buffer0,
1193                                              colorRb, depthRb, stencilRb,
1194                                              rbs, &numRbs);
1195         }
1196
1197         dumpFramebufferAttachments(json, GL_DRAW_FRAMEBUFFER);
1198
1199         if (multisample) {
1200             glBindRenderbuffer(GL_RENDERBUFFER_BINDING, boundRb);
1201             glDeleteRenderbuffers(numRbs, rbs);
1202             glDeleteFramebuffers(1, &fboCopy);
1203         }
1204
1205         glBindFramebuffer(GL_READ_FRAMEBUFFER, boundReadFbo);
1206         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundDrawFbo);
1207     }
1208
1209     json.endObject();
1210     json.endMember(); // framebuffer
1211 }
1212
1213
1214 static const GLenum bindings[] = {
1215     GL_DRAW_BUFFER,
1216     GL_READ_BUFFER,
1217     GL_PIXEL_PACK_BUFFER_BINDING,
1218     GL_PIXEL_UNPACK_BUFFER_BINDING,
1219     GL_TEXTURE_BINDING_1D,
1220     GL_TEXTURE_BINDING_2D,
1221     GL_TEXTURE_BINDING_3D,
1222     GL_TEXTURE_BINDING_RECTANGLE,
1223     GL_TEXTURE_BINDING_CUBE_MAP,
1224     GL_DRAW_FRAMEBUFFER_BINDING,
1225     GL_READ_FRAMEBUFFER_BINDING,
1226     GL_RENDERBUFFER_BINDING,
1227     GL_DRAW_BUFFER0,
1228     GL_DRAW_BUFFER1,
1229     GL_DRAW_BUFFER2,
1230     GL_DRAW_BUFFER3,
1231     GL_DRAW_BUFFER4,
1232     GL_DRAW_BUFFER5,
1233     GL_DRAW_BUFFER6,
1234     GL_DRAW_BUFFER7,
1235 };
1236
1237
1238 #define NUM_BINDINGS sizeof(bindings)/sizeof(bindings[0])
1239
1240
1241 void dumpCurrentContext(std::ostream &os)
1242 {
1243     JSONWriter json(os);
1244
1245 #ifndef NDEBUG
1246     GLint old_bindings[NUM_BINDINGS];
1247     for (unsigned i = 0; i < NUM_BINDINGS; ++i) {
1248         old_bindings[i] = 0;
1249         glGetIntegerv(bindings[i], &old_bindings[i]);
1250     }
1251 #endif
1252
1253     dumpParameters(json);
1254     dumpShaders(json);
1255     dumpUniforms(json);
1256     dumpTextures(json);
1257     dumpFramebuffer(json);
1258
1259 #ifndef NDEBUG
1260     for (unsigned i = 0; i < NUM_BINDINGS; ++i) {
1261         GLint new_binding = 0;
1262         glGetIntegerv(bindings[i], &new_binding);
1263         if (new_binding != old_bindings[i]) {
1264             std::cerr << "warning: " << enumToString(bindings[i]) << " was clobbered\n";
1265         }
1266     }
1267 #endif
1268
1269 }
1270
1271
1272 } /* namespace glstate */