1 /**************************************************************************
3 * Copyright 2011 Jose Fonseca
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
24 **************************************************************************/
38 #include "glstate.hpp"
43 #include <Carbon/Carbon.h>
49 OSStatus CGSGetSurfaceBounds(CGSConnectionID, CGWindowID, CGSSurfaceID, CGRect *);
55 #endif /* __APPLE__ */
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);
77 restorePixelPackState(void) {
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;
88 getShaderSource(ShaderMap &shaderMap, GLuint shader)
94 GLint shader_type = 0;
95 glGetShaderiv(shader, GL_SHADER_TYPE, &shader_type);
100 GLint source_length = 0;
101 glGetShaderiv(shader, GL_SHADER_SOURCE_LENGTH, &source_length);
102 if (!source_length) {
106 GLchar *source = new GLchar[source_length];
109 glGetShaderSource(shader, source_length, &length, source);
111 shaderMap[enumToString(shader_type)] += source;
118 getShaderObjSource(ShaderMap &shaderMap, GLhandleARB shaderObj)
124 GLint object_type = 0;
125 glGetObjectParameterivARB(shaderObj, GL_OBJECT_TYPE_ARB, &object_type);
126 if (object_type != GL_SHADER_OBJECT_ARB) {
130 GLint shader_type = 0;
131 glGetObjectParameterivARB(shaderObj, GL_OBJECT_SUBTYPE_ARB, &shader_type);
136 GLint source_length = 0;
137 glGetObjectParameterivARB(shaderObj, GL_OBJECT_SHADER_SOURCE_LENGTH_ARB, &source_length);
138 if (!source_length) {
142 GLcharARB *source = new GLcharARB[source_length];
145 glGetShaderSource(shaderObj, source_length, &length, source);
147 shaderMap[enumToString(shader_type)] += source;
154 dumpProgram(JSONWriter &json, GLint program)
156 GLint attached_shaders = 0;
157 glGetProgramiv(program, GL_ATTACHED_SHADERS, &attached_shaders);
158 if (!attached_shaders) {
164 GLuint *shaders = new GLuint[attached_shaders];
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]);
173 for (ShaderMap::const_iterator it = shaderMap.begin(); it != shaderMap.end(); ++it) {
174 json.beginMember(it->first);
175 json.writeString(it->second);
182 dumpProgramObj(JSONWriter &json, GLhandleARB programObj)
184 GLint attached_shaders = 0;
185 glGetObjectParameterivARB(programObj, GL_OBJECT_ATTACHED_OBJECTS_ARB, &attached_shaders);
186 if (!attached_shaders) {
192 GLhandleARB *shaderObjs = new GLhandleARB[attached_shaders];
194 glGetAttachedObjectsARB(programObj, attached_shaders, &count, shaderObjs);
195 std::sort(shaderObjs, shaderObjs + count);
196 for (GLsizei i = 0; i < count; ++ i) {
197 getShaderObjSource(shaderMap, shaderObjs[i]);
199 delete [] shaderObjs;
201 for (ShaderMap::const_iterator it = shaderMap.begin(); it != shaderMap.end(); ++it) {
202 json.beginMember(it->first);
203 json.writeString(it->second);
209 * When fetching the uniform name of an array we usually get name[0]
210 * so we need to cut the trailing "[0]" in order to properly construct
211 * array names later. Otherwise we endup with stuff like
212 * uniformArray[0][0],
213 * uniformArray[0][1],
219 resolveUniformName(const GLchar *name, GLint size)
221 std::string qualifiedName(name);
223 std::string::size_type nameLength = qualifiedName.length();
224 static const char * const arrayStart = "[0]";
225 static const int arrayStartLen = 3;
226 if (qualifiedName.rfind(arrayStart) == (nameLength - arrayStartLen)) {
227 qualifiedName = qualifiedName.substr(0, nameLength - 3);
230 return qualifiedName;
234 dumpUniform(JSONWriter &json, GLint program, GLint size, GLenum type, const GLchar *name) {
237 __gl_uniform_size(type, elemType, numElems);
238 if (elemType == GL_NONE) {
242 GLfloat fvalues[4*4];
243 GLdouble dvalues[4*4];
245 GLuint uivalues[4*4];
249 std::string qualifiedName = resolveUniformName(name, size);
251 for (i = 0; i < size; ++i) {
252 std::stringstream ss;
256 ss << '[' << i << ']';
259 std::string elemName = ss.str();
261 json.beginMember(elemName);
263 GLint location = glGetUniformLocation(program, elemName.c_str());
271 glGetUniformfv(program, location, fvalues);
272 for (j = 0; j < numElems; ++j) {
273 json.writeNumber(fvalues[j]);
277 glGetUniformdv(program, location, dvalues);
278 for (j = 0; j < numElems; ++j) {
279 json.writeNumber(dvalues[j]);
283 glGetUniformiv(program, location, ivalues);
284 for (j = 0; j < numElems; ++j) {
285 json.writeNumber(ivalues[j]);
288 case GL_UNSIGNED_INT:
289 glGetUniformuiv(program, location, uivalues);
290 for (j = 0; j < numElems; ++j) {
291 json.writeNumber(uivalues[j]);
295 glGetUniformiv(program, location, ivalues);
296 for (j = 0; j < numElems; ++j) {
297 json.writeBool(ivalues[j]);
315 dumpUniformARB(JSONWriter &json, GLhandleARB programObj, GLint size, GLenum type, const GLchar *name) {
319 __gl_uniform_size(type, elemType, numElems);
320 if (elemType == GL_NONE) {
324 GLfloat fvalues[4*4];
329 std::string qualifiedName = resolveUniformName(name, size);
331 for (i = 0; i < size; ++i) {
332 std::stringstream ss;
336 ss << '[' << i << ']';
339 std::string elemName = ss.str();
341 json.beginMember(elemName);
343 GLint location = glGetUniformLocationARB(programObj, elemName.c_str());
351 // glGetUniformdvARB does not exists
353 glGetUniformfvARB(programObj, location, fvalues);
354 for (j = 0; j < numElems; ++j) {
355 json.writeNumber(fvalues[j]);
358 case GL_UNSIGNED_INT:
359 // glGetUniformuivARB does not exists
361 glGetUniformivARB(programObj, location, ivalues);
362 for (j = 0; j < numElems; ++j) {
363 json.writeNumber(ivalues[j]);
367 glGetUniformivARB(programObj, location, ivalues);
368 for (j = 0; j < numElems; ++j) {
369 json.writeBool(ivalues[j]);
387 dumpProgramUniforms(JSONWriter &json, GLint program)
389 GLint active_uniforms = 0;
390 glGetProgramiv(program, GL_ACTIVE_UNIFORMS, &active_uniforms);
391 if (!active_uniforms) {
395 GLint active_uniform_max_length = 0;
396 glGetProgramiv(program, GL_ACTIVE_UNIFORM_MAX_LENGTH, &active_uniform_max_length);
397 GLchar *name = new GLchar[active_uniform_max_length];
402 for (GLint index = 0; index < active_uniforms; ++index) {
405 GLenum type = GL_NONE;
406 glGetActiveUniform(program, index, active_uniform_max_length, &length, &size, &type, name);
408 dumpUniform(json, program, size, type, name);
416 dumpProgramObjUniforms(JSONWriter &json, GLhandleARB programObj)
418 GLint active_uniforms = 0;
419 glGetObjectParameterivARB(programObj, GL_OBJECT_ACTIVE_UNIFORMS_ARB, &active_uniforms);
420 if (!active_uniforms) {
424 GLint active_uniform_max_length = 0;
425 glGetObjectParameterivARB(programObj, GL_OBJECT_ACTIVE_UNIFORM_MAX_LENGTH_ARB, &active_uniform_max_length);
426 GLchar *name = new GLchar[active_uniform_max_length];
431 for (GLint index = 0; index < active_uniforms; ++index) {
434 GLenum type = GL_NONE;
435 glGetActiveUniformARB(programObj, index, active_uniform_max_length, &length, &size, &type, name);
437 dumpUniformARB(json, programObj, size, type, name);
445 dumpArbProgram(JSONWriter &json, GLenum target)
447 if (!glIsEnabled(target)) {
451 GLint program_length = 0;
452 glGetProgramivARB(target, GL_PROGRAM_LENGTH_ARB, &program_length);
453 if (!program_length) {
457 GLchar *source = new GLchar[program_length + 1];
459 glGetProgramStringARB(target, GL_PROGRAM_STRING_ARB, source);
460 source[program_length] = 0;
462 json.beginMember(enumToString(target));
463 json.writeString(source);
471 dumpArbProgramUniforms(JSONWriter &json, GLenum target, const char *prefix)
473 if (!glIsEnabled(target)) {
477 GLint program_parameters = 0;
478 glGetProgramivARB(target, GL_PROGRAM_PARAMETERS_ARB, &program_parameters);
479 if (!program_parameters) {
483 GLint max_program_local_parameters = 0;
484 glGetProgramivARB(target, GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB, &max_program_local_parameters);
485 for (GLint index = 0; index < max_program_local_parameters; ++index) {
486 GLdouble params[4] = {0, 0, 0, 0};
487 glGetProgramLocalParameterdvARB(target, index, params);
489 if (!params[0] && !params[1] && !params[2] && !params[3]) {
494 snprintf(name, sizeof name, "%sprogram.local[%i]", prefix, index);
496 json.beginMember(name);
498 json.writeNumber(params[0]);
499 json.writeNumber(params[1]);
500 json.writeNumber(params[2]);
501 json.writeNumber(params[3]);
506 GLint max_program_env_parameters = 0;
507 glGetProgramivARB(target, GL_MAX_PROGRAM_ENV_PARAMETERS_ARB, &max_program_env_parameters);
508 for (GLint index = 0; index < max_program_env_parameters; ++index) {
509 GLdouble params[4] = {0, 0, 0, 0};
510 glGetProgramEnvParameterdvARB(target, index, params);
512 if (!params[0] && !params[1] && !params[2] && !params[3]) {
517 snprintf(name, sizeof name, "%sprogram.env[%i]", prefix, index);
519 json.beginMember(name);
521 json.writeNumber(params[0]);
522 json.writeNumber(params[1]);
523 json.writeNumber(params[2]);
524 json.writeNumber(params[3]);
532 dumpShadersUniforms(JSONWriter &json)
535 glGetIntegerv(GL_CURRENT_PROGRAM, &program);
537 GLhandleARB programObj = glGetHandleARB(GL_PROGRAM_OBJECT_ARB);
539 json.beginMember("shaders");
542 dumpProgram(json, program);
543 } else if (programObj) {
544 dumpProgramObj(json, programObj);
546 dumpArbProgram(json, GL_FRAGMENT_PROGRAM_ARB);
547 dumpArbProgram(json, GL_VERTEX_PROGRAM_ARB);
550 json.endMember(); // shaders
552 json.beginMember("uniforms");
555 dumpProgramUniforms(json, program);
556 } else if (programObj) {
557 dumpProgramObjUniforms(json, programObj);
559 dumpArbProgramUniforms(json, GL_FRAGMENT_PROGRAM_ARB, "fp.");
560 dumpArbProgramUniforms(json, GL_VERTEX_PROGRAM_ARB, "vp.");
563 json.endMember(); // uniforms
568 dumpTextureImage(JSONWriter &json, GLenum target, GLint level)
570 GLint width, height = 1, depth = 1;
573 glGetTexLevelParameteriv(target, level, GL_TEXTURE_INTERNAL_FORMAT, &format);
576 glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
578 if (target != GL_TEXTURE_1D) {
580 glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
581 if (target == GL_TEXTURE_3D) {
583 glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);
587 if (width <= 0 || height <= 0 || depth <= 0) {
592 GLint active_texture = GL_TEXTURE0;
593 glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
594 snprintf(label, sizeof label, "%s, %s, %s, %d level",
595 enumToString(active_texture), enumToString(target), enumToString(format), level);
597 json.beginMember(label);
601 // Tell the GUI this is no ordinary object, but an image
602 json.writeStringMember("__class__", "image");
604 json.writeNumberMember("__width__", width);
605 json.writeNumberMember("__height__", height);
606 json.writeNumberMember("__depth__", depth);
608 // Hardcoded for now, but we could chose types more adequate to the
609 // texture internal format
610 json.writeStringMember("__type__", "uint8");
611 json.writeBoolMember("__normalized__", true);
612 json.writeNumberMember("__channels__", 4);
614 GLubyte *pixels = new GLubyte[depth*width*height*4];
616 resetPixelPackState();
618 glGetTexImage(target, level, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
620 restorePixelPackState();
622 json.beginMember("__data__");
625 image::writePixelsToBuffer(pixels, width, height, 4, true, &pngBuffer, &pngBufferSize);
626 json.writeBase64(pngBuffer, pngBufferSize);
628 json.endMember(); // __data__
637 dumpTexture(JSONWriter &json, GLenum target, GLenum binding)
639 GLint texture_binding = 0;
640 glGetIntegerv(binding, &texture_binding);
641 if (!glIsEnabled(target) && !texture_binding) {
647 GLint width = 0, height = 0;
648 glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
649 glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
650 if (!width || !height) {
654 if (target == GL_TEXTURE_CUBE_MAP) {
655 for (int face = 0; face < 6; ++face) {
656 dumpTextureImage(json, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, level);
659 dumpTextureImage(json, target, level);
668 dumpTextures(JSONWriter &json)
670 json.beginMember("textures");
672 GLint active_texture = GL_TEXTURE0;
673 glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
674 GLint max_texture_coords = 0;
675 glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);
676 GLint max_combined_texture_image_units = 0;
677 glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);
678 GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);
679 for (GLint unit = 0; unit < max_units; ++unit) {
680 GLenum texture = GL_TEXTURE0 + unit;
681 glActiveTexture(texture);
682 dumpTexture(json, GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D);
683 dumpTexture(json, GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D);
684 dumpTexture(json, GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D);
685 dumpTexture(json, GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE);
686 dumpTexture(json, GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP);
688 glActiveTexture(active_texture);
690 json.endMember(); // textures
695 getDrawableBounds(GLint *width, GLint *height) {
698 HDC hDC = wglGetCurrentDC();
703 HWND hWnd = WindowFromDC(hDC);
706 if (!GetClientRect(hWnd, &rect)) {
710 *width = rect.right - rect.left;
711 *height = rect.bottom - rect.top;
713 #elif defined(__APPLE__)
715 CGLContextObj ctx = CGLGetCurrentContext();
724 if (CGLGetSurface(ctx, &cid, &wid, &sid) != kCGLNoError) {
730 if (CGSGetSurfaceBounds(cid, wid, sid, &rect) != 0) {
734 *width = rect.size.width;
735 *height = rect.size.height;
743 unsigned int w, h, bw, depth;
745 display = glXGetCurrentDisplay();
750 drawable = glXGetCurrentDrawable();
751 if (drawable == None) {
755 if (!XGetGeometry(display, drawable, &root, &x, &y, &w, &h, &bw, &depth)) {
768 static const GLenum texture_bindings[][2] = {
769 {GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D},
770 {GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D},
771 {GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D},
772 {GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE},
773 {GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP}
778 bindTexture(GLint texture, GLenum &target, GLint &bound_texture)
781 for (unsigned i = 0; i < sizeof(texture_bindings)/sizeof(texture_bindings[0]); ++i) {
782 target = texture_bindings[i][0];
784 GLenum binding = texture_bindings[i][1];
786 while (glGetError() != GL_NO_ERROR)
789 glGetIntegerv(binding, &bound_texture);
790 glBindTexture(target, texture);
792 if (glGetError() == GL_NO_ERROR) {
796 glBindTexture(target, bound_texture);
806 getTextureLevelSize(GLint texture, GLint level, GLint *width, GLint *height)
812 GLint bound_texture = 0;
813 if (!bindTexture(texture, target, bound_texture)) {
817 glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, width);
818 glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, height);
820 glBindTexture(target, bound_texture);
822 return *width > 0 && *height > 0;
827 getTextureLevelFormat(GLint texture, GLint level)
830 GLint bound_texture = 0;
831 if (!bindTexture(texture, target, bound_texture)) {
835 GLint format = GL_NONE;
836 glGetTexLevelParameteriv(target, level, GL_TEXTURE_INTERNAL_FORMAT, &format);
838 glBindTexture(target, bound_texture);
846 getRenderbufferSize(GLint renderbuffer, GLint *width, GLint *height)
848 GLint bound_renderbuffer = 0;
849 glGetIntegerv(GL_RENDERBUFFER_BINDING, &bound_renderbuffer);
850 glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
854 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, width);
855 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, height);
857 glBindRenderbuffer(GL_RENDERBUFFER, bound_renderbuffer);
859 return *width > 0 && *height > 0;
864 getFramebufferAttachmentSize(GLenum target, GLenum attachment, GLint *width, GLint *height)
866 GLint object_type = GL_NONE;
867 glGetFramebufferAttachmentParameteriv(target, attachment,
868 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE,
870 if (object_type == GL_NONE) {
874 GLint object_name = 0;
875 glGetFramebufferAttachmentParameteriv(target, attachment,
876 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
878 if (object_name == 0) {
882 if (object_type == GL_RENDERBUFFER) {
883 return getRenderbufferSize(object_name, width, height);
884 } else if (object_type == GL_TEXTURE) {
885 GLint texture_level = 0;
886 glGetFramebufferAttachmentParameteriv(target, attachment,
887 GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL,
889 return getTextureLevelSize(object_name, texture_level, width, height);
891 std::cerr << "warning: unexpected GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE = " << object_type << "\n";
899 getFramebufferAttachmentFormat(GLenum target, GLenum attachment)
901 GLint object_type = GL_NONE;
902 glGetFramebufferAttachmentParameteriv(target, attachment,
903 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE,
905 if (object_type == GL_NONE) {
909 GLint object_name = 0;
910 glGetFramebufferAttachmentParameteriv(target, attachment,
911 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
913 if (object_name == 0) {
917 if (object_type == GL_RENDERBUFFER) {
918 GLint format = GL_NONE;
919 glGetRenderbufferParameteriv(object_name, GL_RENDERBUFFER_INTERNAL_FORMAT,
922 } else if (object_type == GL_TEXTURE) {
923 GLint texture_level = 0;
924 glGetFramebufferAttachmentParameteriv(target, attachment,
925 GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL,
928 GLint format = getTextureLevelFormat(object_name, texture_level);
931 std::cerr << "warning: unexpected GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE = " << object_type << "\n";
939 getDrawBufferImage(GLenum format) {
940 GLint channels = __gl_format_channels(format);
945 GLint draw_framebuffer = 0;
946 glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &draw_framebuffer);
948 GLint draw_buffer = GL_NONE;
950 if (draw_framebuffer) {
951 glGetIntegerv(GL_DRAW_BUFFER0, &draw_buffer);
952 if (draw_buffer == GL_NONE) {
956 if (!getFramebufferAttachmentSize(GL_DRAW_FRAMEBUFFER, draw_buffer, &width, &height)) {
960 glGetIntegerv(GL_DRAW_BUFFER, &draw_buffer);
961 if (draw_buffer == GL_NONE) {
965 if (!getDrawableBounds(&width, &height)) {
970 image::Image *image = new image::Image(width, height, channels, true);
975 while (glGetError() != GL_NO_ERROR) {}
977 GLint read_framebuffer = 0;
978 glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_framebuffer);
979 glBindFramebuffer(GL_READ_FRAMEBUFFER, draw_framebuffer);
981 GLint read_buffer = 0;
982 glGetIntegerv(GL_READ_BUFFER, &read_buffer);
983 glReadBuffer(draw_buffer);
985 // TODO: reset imaging state too
986 resetPixelPackState();
988 glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, image->pixels);
990 restorePixelPackState();
991 glReadBuffer(read_buffer);
992 glBindFramebuffer(GL_READ_FRAMEBUFFER, read_framebuffer);
994 GLenum error = glGetError();
995 if (error != GL_NO_ERROR) {
997 std::cerr << "warning: " << enumToString(error) << " while getting snapshot\n";
998 error = glGetError();
999 } while(error != GL_NO_ERROR);
1009 * Dump the image of the currently bound read buffer.
1012 dumpReadBufferImage(JSONWriter &json, GLint width, GLint height, GLenum format)
1014 GLint channels = __gl_format_channels(format);
1018 // Tell the GUI this is no ordinary object, but an image
1019 json.writeStringMember("__class__", "image");
1021 json.writeNumberMember("__width__", width);
1022 json.writeNumberMember("__height__", height);
1023 json.writeNumberMember("__depth__", 1);
1025 // Hardcoded for now, but we could chose types more adequate to the
1026 // texture internal format
1027 json.writeStringMember("__type__", "uint8");
1028 json.writeBoolMember("__normalized__", true);
1029 json.writeNumberMember("__channels__", channels);
1031 GLubyte *pixels = new GLubyte[width*height*channels];
1033 // TODO: reset imaging state too
1034 resetPixelPackState();
1036 glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, pixels);
1038 restorePixelPackState();
1040 json.beginMember("__data__");
1043 image::writePixelsToBuffer(pixels, width, height, channels, true, &pngBuffer, &pngBufferSize);
1044 //std::cerr <<" Before = "<<(width * height * channels * sizeof *pixels)
1045 // <<", after = "<<pngBufferSize << ", ratio = " << double(width * height * channels * sizeof *pixels)/pngBufferSize;
1046 json.writeBase64(pngBuffer, pngBufferSize);
1048 json.endMember(); // __data__
1055 static inline GLuint
1056 downsampledFramebuffer(GLuint oldFbo, GLint drawbuffer,
1057 GLint colorRb, GLint depthRb, GLint stencilRb,
1058 GLuint *rbs, GLint *numRbs)
1066 glGenFramebuffers(1, &fbo);
1067 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
1069 glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
1070 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1071 GL_RENDERBUFFER_WIDTH, &w);
1072 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1073 GL_RENDERBUFFER_HEIGHT, &h);
1074 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1075 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
1077 glGenRenderbuffers(1, &rbs[*numRbs]);
1078 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1079 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1080 glFramebufferRenderbuffer(GL_FRAMEBUFFER, drawbuffer,
1081 GL_RENDERBUFFER, rbs[*numRbs]);
1083 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1084 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1085 glDrawBuffer(drawbuffer);
1086 glReadBuffer(drawbuffer);
1087 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1088 GL_COLOR_BUFFER_BIT, GL_NEAREST);
1089 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
1092 if (stencilRb == depthRb && stencilRb) {
1093 //combined depth and stencil buffer
1094 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
1095 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1096 GL_RENDERBUFFER_WIDTH, &w);
1097 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1098 GL_RENDERBUFFER_HEIGHT, &h);
1099 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1100 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
1102 glGenRenderbuffers(1, &rbs[*numRbs]);
1103 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1104 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1105 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
1106 GL_RENDERBUFFER, rbs[*numRbs]);
1107 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1108 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1109 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1110 GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
1111 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
1115 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
1116 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1117 GL_RENDERBUFFER_WIDTH, &w);
1118 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1119 GL_RENDERBUFFER_HEIGHT, &h);
1120 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1121 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
1123 glGenRenderbuffers(1, &rbs[*numRbs]);
1124 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1125 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1126 glFramebufferRenderbuffer(GL_FRAMEBUFFER,
1127 GL_DEPTH_ATTACHMENT,
1128 GL_RENDERBUFFER, rbs[*numRbs]);
1129 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1130 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1131 glDrawBuffer(GL_DEPTH_ATTACHMENT);
1132 glReadBuffer(GL_DEPTH_ATTACHMENT);
1133 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1134 GL_DEPTH_BUFFER_BIT, GL_NEAREST);
1138 glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
1139 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1140 GL_RENDERBUFFER_WIDTH, &w);
1141 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1142 GL_RENDERBUFFER_HEIGHT, &h);
1143 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1144 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
1146 glGenRenderbuffers(1, &rbs[*numRbs]);
1147 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1148 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1149 glFramebufferRenderbuffer(GL_FRAMEBUFFER,
1150 GL_STENCIL_ATTACHMENT,
1151 GL_RENDERBUFFER, rbs[*numRbs]);
1152 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1153 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1154 glDrawBuffer(GL_STENCIL_ATTACHMENT);
1155 glReadBuffer(GL_STENCIL_ATTACHMENT);
1156 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1157 GL_STENCIL_BUFFER_BIT, GL_NEAREST);
1167 * Dump images of current draw drawable/window.
1170 dumpDrawableImages(JSONWriter &json)
1172 GLint width, height;
1174 if (!getDrawableBounds(&width, &height)) {
1178 GLint draw_buffer = GL_NONE;
1179 glGetIntegerv(GL_DRAW_BUFFER, &draw_buffer);
1180 glReadBuffer(draw_buffer);
1182 if (draw_buffer != GL_NONE) {
1183 GLint read_buffer = GL_NONE;
1184 glGetIntegerv(GL_READ_BUFFER, &read_buffer);
1186 GLint alpha_bits = 0;
1187 glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
1188 GLenum format = alpha_bits ? GL_RGBA : GL_RGB;
1189 json.beginMember(enumToString(draw_buffer));
1190 dumpReadBufferImage(json, width, height, format);
1193 glReadBuffer(read_buffer);
1196 GLint depth_bits = 0;
1197 glGetIntegerv(GL_DEPTH_BITS, &depth_bits);
1199 json.beginMember("GL_DEPTH_COMPONENT");
1200 dumpReadBufferImage(json, width, height, GL_DEPTH_COMPONENT);
1204 GLint stencil_bits = 0;
1205 glGetIntegerv(GL_STENCIL_BITS, &stencil_bits);
1207 json.beginMember("GL_STENCIL_INDEX");
1208 dumpReadBufferImage(json, width, height, GL_STENCIL_INDEX);
1213 * Dump the specified framebuffer attachment.
1215 * In the case of a color attachment, it assumes it is already bound for read.
1218 dumpFramebufferAttachment(JSONWriter &json, GLenum target, GLenum attachment, GLenum format)
1220 GLint width = 0, height = 0;
1221 if (!getFramebufferAttachmentSize(target, attachment, &width, &height)) {
1225 GLint internalFormat = getFramebufferAttachmentFormat(target, attachment);
1226 std::stringstream ss;
1227 ss << enumToString(attachment);
1228 if (internalFormat != GL_NONE) {
1230 ss << enumToString(internalFormat);
1233 json.beginMember(ss.str());
1234 dumpReadBufferImage(json, width, height, format);
1240 dumpFramebufferAttachments(JSONWriter &json, GLenum target)
1242 GLint read_framebuffer = 0;
1243 glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_framebuffer);
1245 GLint read_buffer = GL_NONE;
1246 glGetIntegerv(GL_READ_BUFFER, &read_buffer);
1248 GLint max_draw_buffers = 1;
1249 glGetIntegerv(GL_MAX_DRAW_BUFFERS, &max_draw_buffers);
1250 GLint max_color_attachments = 0;
1251 glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, &max_color_attachments);
1253 for (GLint i = 0; i < max_draw_buffers; ++i) {
1254 GLint draw_buffer = GL_NONE;
1255 glGetIntegerv(GL_DRAW_BUFFER0 + i, &draw_buffer);
1256 if (draw_buffer != GL_NONE) {
1257 glReadBuffer(draw_buffer);
1259 if (draw_buffer >= GL_COLOR_ATTACHMENT0 && draw_buffer < GL_COLOR_ATTACHMENT0 + max_color_attachments) {
1260 attachment = draw_buffer;
1262 std::cerr << "warning: unexpected GL_DRAW_BUFFER" << i << " = " << draw_buffer << "\n";
1263 attachment = GL_COLOR_ATTACHMENT0;
1265 GLint alpha_size = 0;
1266 glGetFramebufferAttachmentParameteriv(target, attachment,
1267 GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE,
1269 GLenum format = alpha_size ? GL_RGBA : GL_RGB;
1270 dumpFramebufferAttachment(json, target, attachment, format);
1274 glReadBuffer(read_buffer);
1276 dumpFramebufferAttachment(json, target, GL_DEPTH_ATTACHMENT, GL_DEPTH_COMPONENT);
1277 dumpFramebufferAttachment(json, target, GL_STENCIL_ATTACHMENT, GL_STENCIL_INDEX);
1279 glBindFramebuffer(GL_READ_FRAMEBUFFER, read_framebuffer);
1284 dumpFramebuffer(JSONWriter &json)
1286 json.beginMember("framebuffer");
1289 GLint boundDrawFbo = 0, boundReadFbo = 0;
1290 glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &boundDrawFbo);
1291 glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &boundReadFbo);
1292 if (!boundDrawFbo) {
1293 dumpDrawableImages(json);
1295 GLint colorRb = 0, stencilRb = 0, depthRb = 0;
1296 GLint draw_buffer0 = GL_NONE;
1297 glGetIntegerv(GL_DRAW_BUFFER0, &draw_buffer0);
1298 bool multisample = false;
1301 glGetIntegerv(GL_RENDERBUFFER_BINDING, &boundRb);
1304 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, draw_buffer0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1305 if (object_type == GL_RENDERBUFFER) {
1306 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, draw_buffer0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &colorRb);
1307 glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
1309 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1315 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1316 if (object_type == GL_RENDERBUFFER) {
1317 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &depthRb);
1318 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
1320 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1326 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1327 if (object_type == GL_RENDERBUFFER) {
1328 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &stencilRb);
1329 glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
1331 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1337 glBindRenderbuffer(GL_RENDERBUFFER, boundRb);
1344 // glReadPixels doesnt support multisampled buffers so we need
1345 // to blit the fbo to a temporary one
1346 fboCopy = downsampledFramebuffer(boundDrawFbo, draw_buffer0,
1347 colorRb, depthRb, stencilRb,
1351 dumpFramebufferAttachments(json, GL_DRAW_FRAMEBUFFER);
1354 glBindRenderbuffer(GL_RENDERBUFFER_BINDING, boundRb);
1355 glDeleteRenderbuffers(numRbs, rbs);
1356 glDeleteFramebuffers(1, &fboCopy);
1359 glBindFramebuffer(GL_READ_FRAMEBUFFER, boundReadFbo);
1360 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundDrawFbo);
1364 json.endMember(); // framebuffer
1368 static const GLenum bindings[] = {
1371 GL_PIXEL_PACK_BUFFER_BINDING,
1372 GL_PIXEL_UNPACK_BUFFER_BINDING,
1373 GL_TEXTURE_BINDING_1D,
1374 GL_TEXTURE_BINDING_2D,
1375 GL_TEXTURE_BINDING_3D,
1376 GL_TEXTURE_BINDING_RECTANGLE,
1377 GL_TEXTURE_BINDING_CUBE_MAP,
1378 GL_DRAW_FRAMEBUFFER_BINDING,
1379 GL_READ_FRAMEBUFFER_BINDING,
1380 GL_RENDERBUFFER_BINDING,
1392 #define NUM_BINDINGS sizeof(bindings)/sizeof(bindings[0])
1395 void dumpCurrentContext(std::ostream &os)
1397 JSONWriter json(os);
1400 GLint old_bindings[NUM_BINDINGS];
1401 for (unsigned i = 0; i < NUM_BINDINGS; ++i) {
1402 old_bindings[i] = 0;
1403 glGetIntegerv(bindings[i], &old_bindings[i]);
1407 dumpParameters(json);
1408 dumpShadersUniforms(json);
1410 dumpFramebuffer(json);
1413 for (unsigned i = 0; i < NUM_BINDINGS; ++i) {
1414 GLint new_binding = 0;
1415 glGetIntegerv(bindings[i], &new_binding);
1416 if (new_binding != old_bindings[i]) {
1417 std::cerr << "warning: " << enumToString(bindings[i]) << " was clobbered\n";
1425 } /* namespace glstate */