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, level = %d",
595 enumToString(active_texture), enumToString(target), 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 json.writeStringMember("__format__", enumToString(format));
610 // Hardcoded for now, but we could chose types more adequate to the
611 // texture internal format
612 json.writeStringMember("__type__", "uint8");
613 json.writeBoolMember("__normalized__", true);
614 json.writeNumberMember("__channels__", 4);
616 GLubyte *pixels = new GLubyte[depth*width*height*4];
618 resetPixelPackState();
620 glGetTexImage(target, level, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
622 restorePixelPackState();
624 json.beginMember("__data__");
627 image::writePixelsToBuffer(pixels, width, height, 4, true, &pngBuffer, &pngBufferSize);
628 json.writeBase64(pngBuffer, pngBufferSize);
630 json.endMember(); // __data__
639 dumpTexture(JSONWriter &json, GLenum target, GLenum binding)
641 GLint texture_binding = 0;
642 glGetIntegerv(binding, &texture_binding);
643 if (!glIsEnabled(target) && !texture_binding) {
649 GLint width = 0, height = 0;
650 glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
651 glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
652 if (!width || !height) {
656 if (target == GL_TEXTURE_CUBE_MAP) {
657 for (int face = 0; face < 6; ++face) {
658 dumpTextureImage(json, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, level);
661 dumpTextureImage(json, target, level);
670 dumpTextures(JSONWriter &json)
672 json.beginMember("textures");
674 GLint active_texture = GL_TEXTURE0;
675 glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
676 GLint max_texture_coords = 0;
677 glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);
678 GLint max_combined_texture_image_units = 0;
679 glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);
680 GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);
681 for (GLint unit = 0; unit < max_units; ++unit) {
682 GLenum texture = GL_TEXTURE0 + unit;
683 glActiveTexture(texture);
684 dumpTexture(json, GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D);
685 dumpTexture(json, GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D);
686 dumpTexture(json, GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D);
687 dumpTexture(json, GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE);
688 dumpTexture(json, GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP);
690 glActiveTexture(active_texture);
692 json.endMember(); // textures
697 getDrawableBounds(GLint *width, GLint *height) {
700 HDC hDC = wglGetCurrentDC();
705 HWND hWnd = WindowFromDC(hDC);
708 if (!GetClientRect(hWnd, &rect)) {
712 *width = rect.right - rect.left;
713 *height = rect.bottom - rect.top;
715 #elif defined(__APPLE__)
717 CGLContextObj ctx = CGLGetCurrentContext();
726 if (CGLGetSurface(ctx, &cid, &wid, &sid) != kCGLNoError) {
732 if (CGSGetSurfaceBounds(cid, wid, sid, &rect) != 0) {
736 *width = rect.size.width;
737 *height = rect.size.height;
746 unsigned int w, h, bw, depth;
748 display = glXGetCurrentDisplay();
753 drawable = glXGetCurrentDrawable();
754 if (drawable == None) {
758 if (!XGetGeometry(display, drawable, &root, &x, &y, &w, &h, &bw, &depth)) {
774 static const GLenum texture_bindings[][2] = {
775 {GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D},
776 {GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D},
777 {GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D},
778 {GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE},
779 {GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP}
784 bindTexture(GLint texture, GLenum &target, GLint &bound_texture)
787 for (unsigned i = 0; i < sizeof(texture_bindings)/sizeof(texture_bindings[0]); ++i) {
788 target = texture_bindings[i][0];
790 GLenum binding = texture_bindings[i][1];
792 while (glGetError() != GL_NO_ERROR)
795 glGetIntegerv(binding, &bound_texture);
796 glBindTexture(target, texture);
798 if (glGetError() == GL_NO_ERROR) {
802 glBindTexture(target, bound_texture);
812 getTextureLevelSize(GLint texture, GLint level, GLint *width, GLint *height)
818 GLint bound_texture = 0;
819 if (!bindTexture(texture, target, bound_texture)) {
823 glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, width);
824 glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, height);
826 glBindTexture(target, bound_texture);
828 return *width > 0 && *height > 0;
833 getTextureLevelFormat(GLint texture, GLint level)
836 GLint bound_texture = 0;
837 if (!bindTexture(texture, target, bound_texture)) {
841 GLint format = GL_NONE;
842 glGetTexLevelParameteriv(target, level, GL_TEXTURE_INTERNAL_FORMAT, &format);
844 glBindTexture(target, bound_texture);
852 getRenderbufferSize(GLint renderbuffer, GLint *width, GLint *height)
854 GLint bound_renderbuffer = 0;
855 glGetIntegerv(GL_RENDERBUFFER_BINDING, &bound_renderbuffer);
856 glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
860 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, width);
861 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, height);
863 glBindRenderbuffer(GL_RENDERBUFFER, bound_renderbuffer);
865 return *width > 0 && *height > 0;
870 getRenderbufferFormat(GLint renderbuffer)
872 GLint bound_renderbuffer = 0;
873 glGetIntegerv(GL_RENDERBUFFER_BINDING, &bound_renderbuffer);
874 glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
876 GLint format = GL_NONE;
877 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
879 glBindRenderbuffer(GL_RENDERBUFFER, bound_renderbuffer);
886 getFramebufferAttachmentSize(GLenum target, GLenum attachment, GLint *width, GLint *height)
888 GLint object_type = GL_NONE;
889 glGetFramebufferAttachmentParameteriv(target, attachment,
890 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE,
892 if (object_type == GL_NONE) {
896 GLint object_name = 0;
897 glGetFramebufferAttachmentParameteriv(target, attachment,
898 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
900 if (object_name == 0) {
904 if (object_type == GL_RENDERBUFFER) {
905 return getRenderbufferSize(object_name, width, height);
906 } else if (object_type == GL_TEXTURE) {
907 GLint texture_level = 0;
908 glGetFramebufferAttachmentParameteriv(target, attachment,
909 GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL,
911 return getTextureLevelSize(object_name, texture_level, width, height);
913 std::cerr << "warning: unexpected GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE = " << object_type << "\n";
921 getFramebufferAttachmentFormat(GLenum target, GLenum attachment)
923 GLint object_type = GL_NONE;
924 glGetFramebufferAttachmentParameteriv(target, attachment,
925 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE,
927 if (object_type == GL_NONE) {
931 GLint object_name = 0;
932 glGetFramebufferAttachmentParameteriv(target, attachment,
933 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
935 if (object_name == 0) {
939 if (object_type == GL_RENDERBUFFER) {
940 return getRenderbufferFormat(object_name);
941 } else if (object_type == GL_TEXTURE) {
942 GLint texture_level = 0;
943 glGetFramebufferAttachmentParameteriv(target, attachment,
944 GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL,
946 return getTextureLevelFormat(object_name, texture_level);
948 std::cerr << "warning: unexpected GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE = " << object_type << "\n";
956 getDrawBufferImage(GLenum format) {
957 GLint channels = __gl_format_channels(format);
962 GLint draw_framebuffer = 0;
963 glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &draw_framebuffer);
965 GLint draw_buffer = GL_NONE;
967 if (draw_framebuffer) {
968 glGetIntegerv(GL_DRAW_BUFFER0, &draw_buffer);
969 if (draw_buffer == GL_NONE) {
973 if (!getFramebufferAttachmentSize(GL_DRAW_FRAMEBUFFER, draw_buffer, &width, &height)) {
977 glGetIntegerv(GL_DRAW_BUFFER, &draw_buffer);
978 if (draw_buffer == GL_NONE) {
982 if (!getDrawableBounds(&width, &height)) {
987 image::Image *image = new image::Image(width, height, channels, true);
992 while (glGetError() != GL_NO_ERROR) {}
994 GLint read_framebuffer = 0;
995 glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_framebuffer);
996 glBindFramebuffer(GL_READ_FRAMEBUFFER, draw_framebuffer);
998 GLint read_buffer = 0;
999 glGetIntegerv(GL_READ_BUFFER, &read_buffer);
1000 glReadBuffer(draw_buffer);
1002 // TODO: reset imaging state too
1003 resetPixelPackState();
1005 glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, image->pixels);
1007 restorePixelPackState();
1008 glReadBuffer(read_buffer);
1009 glBindFramebuffer(GL_READ_FRAMEBUFFER, read_framebuffer);
1011 GLenum error = glGetError();
1012 if (error != GL_NO_ERROR) {
1014 std::cerr << "warning: " << enumToString(error) << " while getting snapshot\n";
1015 error = glGetError();
1016 } while(error != GL_NO_ERROR);
1026 * Dump the image of the currently bound read buffer.
1029 dumpReadBufferImage(JSONWriter &json, GLint width, GLint height, GLenum format,
1030 GLint internalFormat = GL_NONE)
1032 GLint channels = __gl_format_channels(format);
1036 // Tell the GUI this is no ordinary object, but an image
1037 json.writeStringMember("__class__", "image");
1039 json.writeNumberMember("__width__", width);
1040 json.writeNumberMember("__height__", height);
1041 json.writeNumberMember("__depth__", 1);
1043 json.writeStringMember("__format__", enumToString(internalFormat));
1045 // Hardcoded for now, but we could chose types more adequate to the
1046 // texture internal format
1047 json.writeStringMember("__type__", "uint8");
1048 json.writeBoolMember("__normalized__", true);
1049 json.writeNumberMember("__channels__", channels);
1051 GLubyte *pixels = new GLubyte[width*height*channels];
1053 // TODO: reset imaging state too
1054 resetPixelPackState();
1056 glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, pixels);
1058 restorePixelPackState();
1060 json.beginMember("__data__");
1063 image::writePixelsToBuffer(pixels, width, height, channels, true, &pngBuffer, &pngBufferSize);
1064 //std::cerr <<" Before = "<<(width * height * channels * sizeof *pixels)
1065 // <<", after = "<<pngBufferSize << ", ratio = " << double(width * height * channels * sizeof *pixels)/pngBufferSize;
1066 json.writeBase64(pngBuffer, pngBufferSize);
1068 json.endMember(); // __data__
1075 static inline GLuint
1076 downsampledFramebuffer(GLuint oldFbo, GLint drawbuffer,
1077 GLint colorRb, GLint depthRb, GLint stencilRb,
1078 GLuint *rbs, GLint *numRbs)
1086 glGenFramebuffers(1, &fbo);
1087 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
1089 glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
1090 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1091 GL_RENDERBUFFER_WIDTH, &w);
1092 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1093 GL_RENDERBUFFER_HEIGHT, &h);
1094 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1095 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
1097 glGenRenderbuffers(1, &rbs[*numRbs]);
1098 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1099 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1100 glFramebufferRenderbuffer(GL_FRAMEBUFFER, drawbuffer,
1101 GL_RENDERBUFFER, rbs[*numRbs]);
1103 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1104 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1105 glDrawBuffer(drawbuffer);
1106 glReadBuffer(drawbuffer);
1107 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1108 GL_COLOR_BUFFER_BIT, GL_NEAREST);
1109 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
1112 if (stencilRb == depthRb && stencilRb) {
1113 //combined depth and stencil buffer
1114 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
1115 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1116 GL_RENDERBUFFER_WIDTH, &w);
1117 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1118 GL_RENDERBUFFER_HEIGHT, &h);
1119 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1120 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
1122 glGenRenderbuffers(1, &rbs[*numRbs]);
1123 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1124 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1125 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
1126 GL_RENDERBUFFER, rbs[*numRbs]);
1127 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1128 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1129 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1130 GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
1131 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
1135 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
1136 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1137 GL_RENDERBUFFER_WIDTH, &w);
1138 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1139 GL_RENDERBUFFER_HEIGHT, &h);
1140 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1141 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
1143 glGenRenderbuffers(1, &rbs[*numRbs]);
1144 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1145 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1146 glFramebufferRenderbuffer(GL_FRAMEBUFFER,
1147 GL_DEPTH_ATTACHMENT,
1148 GL_RENDERBUFFER, rbs[*numRbs]);
1149 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1150 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1151 glDrawBuffer(GL_DEPTH_ATTACHMENT);
1152 glReadBuffer(GL_DEPTH_ATTACHMENT);
1153 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1154 GL_DEPTH_BUFFER_BIT, GL_NEAREST);
1158 glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
1159 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1160 GL_RENDERBUFFER_WIDTH, &w);
1161 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1162 GL_RENDERBUFFER_HEIGHT, &h);
1163 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
1164 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
1166 glGenRenderbuffers(1, &rbs[*numRbs]);
1167 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
1168 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
1169 glFramebufferRenderbuffer(GL_FRAMEBUFFER,
1170 GL_STENCIL_ATTACHMENT,
1171 GL_RENDERBUFFER, rbs[*numRbs]);
1172 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
1173 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
1174 glDrawBuffer(GL_STENCIL_ATTACHMENT);
1175 glReadBuffer(GL_STENCIL_ATTACHMENT);
1176 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
1177 GL_STENCIL_BUFFER_BIT, GL_NEAREST);
1187 * Dump images of current draw drawable/window.
1190 dumpDrawableImages(JSONWriter &json)
1192 GLint width, height;
1194 if (!getDrawableBounds(&width, &height)) {
1198 GLint draw_buffer = GL_NONE;
1199 glGetIntegerv(GL_DRAW_BUFFER, &draw_buffer);
1200 glReadBuffer(draw_buffer);
1202 if (draw_buffer != GL_NONE) {
1203 GLint read_buffer = GL_NONE;
1204 glGetIntegerv(GL_READ_BUFFER, &read_buffer);
1206 GLint alpha_bits = 0;
1207 glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
1208 GLenum format = alpha_bits ? GL_RGBA : GL_RGB;
1209 json.beginMember(enumToString(draw_buffer));
1210 dumpReadBufferImage(json, width, height, format);
1213 glReadBuffer(read_buffer);
1216 GLint depth_bits = 0;
1217 glGetIntegerv(GL_DEPTH_BITS, &depth_bits);
1219 json.beginMember("GL_DEPTH_COMPONENT");
1220 dumpReadBufferImage(json, width, height, GL_DEPTH_COMPONENT);
1224 GLint stencil_bits = 0;
1225 glGetIntegerv(GL_STENCIL_BITS, &stencil_bits);
1227 json.beginMember("GL_STENCIL_INDEX");
1228 dumpReadBufferImage(json, width, height, GL_STENCIL_INDEX);
1233 * Dump the specified framebuffer attachment.
1235 * In the case of a color attachment, it assumes it is already bound for read.
1238 dumpFramebufferAttachment(JSONWriter &json, GLenum target, GLenum attachment, GLenum format)
1240 GLint width = 0, height = 0;
1241 if (!getFramebufferAttachmentSize(target, attachment, &width, &height)) {
1245 GLint internalFormat = getFramebufferAttachmentFormat(target, attachment);
1247 json.beginMember(enumToString(attachment));
1248 dumpReadBufferImage(json, width, height, format, internalFormat);
1254 dumpFramebufferAttachments(JSONWriter &json, GLenum target)
1256 GLint read_framebuffer = 0;
1257 glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_framebuffer);
1259 GLint read_buffer = GL_NONE;
1260 glGetIntegerv(GL_READ_BUFFER, &read_buffer);
1262 GLint max_draw_buffers = 1;
1263 glGetIntegerv(GL_MAX_DRAW_BUFFERS, &max_draw_buffers);
1264 GLint max_color_attachments = 0;
1265 glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, &max_color_attachments);
1267 for (GLint i = 0; i < max_draw_buffers; ++i) {
1268 GLint draw_buffer = GL_NONE;
1269 glGetIntegerv(GL_DRAW_BUFFER0 + i, &draw_buffer);
1270 if (draw_buffer != GL_NONE) {
1271 glReadBuffer(draw_buffer);
1273 if (draw_buffer >= GL_COLOR_ATTACHMENT0 && draw_buffer < GL_COLOR_ATTACHMENT0 + max_color_attachments) {
1274 attachment = draw_buffer;
1276 std::cerr << "warning: unexpected GL_DRAW_BUFFER" << i << " = " << draw_buffer << "\n";
1277 attachment = GL_COLOR_ATTACHMENT0;
1279 GLint alpha_size = 0;
1280 glGetFramebufferAttachmentParameteriv(target, attachment,
1281 GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE,
1283 GLenum format = alpha_size ? GL_RGBA : GL_RGB;
1284 dumpFramebufferAttachment(json, target, attachment, format);
1288 glReadBuffer(read_buffer);
1290 dumpFramebufferAttachment(json, target, GL_DEPTH_ATTACHMENT, GL_DEPTH_COMPONENT);
1291 dumpFramebufferAttachment(json, target, GL_STENCIL_ATTACHMENT, GL_STENCIL_INDEX);
1293 glBindFramebuffer(GL_READ_FRAMEBUFFER, read_framebuffer);
1298 dumpFramebuffer(JSONWriter &json)
1300 json.beginMember("framebuffer");
1303 GLint boundDrawFbo = 0, boundReadFbo = 0;
1304 glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &boundDrawFbo);
1305 glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &boundReadFbo);
1306 if (!boundDrawFbo) {
1307 dumpDrawableImages(json);
1309 GLint colorRb = 0, stencilRb = 0, depthRb = 0;
1310 GLint draw_buffer0 = GL_NONE;
1311 glGetIntegerv(GL_DRAW_BUFFER0, &draw_buffer0);
1312 bool multisample = false;
1315 glGetIntegerv(GL_RENDERBUFFER_BINDING, &boundRb);
1318 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, draw_buffer0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1319 if (object_type == GL_RENDERBUFFER) {
1320 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, draw_buffer0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &colorRb);
1321 glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
1323 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1329 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1330 if (object_type == GL_RENDERBUFFER) {
1331 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &depthRb);
1332 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
1334 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1340 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
1341 if (object_type == GL_RENDERBUFFER) {
1342 glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &stencilRb);
1343 glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
1345 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
1351 glBindRenderbuffer(GL_RENDERBUFFER, boundRb);
1358 // glReadPixels doesnt support multisampled buffers so we need
1359 // to blit the fbo to a temporary one
1360 fboCopy = downsampledFramebuffer(boundDrawFbo, draw_buffer0,
1361 colorRb, depthRb, stencilRb,
1365 dumpFramebufferAttachments(json, GL_DRAW_FRAMEBUFFER);
1368 glBindRenderbuffer(GL_RENDERBUFFER_BINDING, boundRb);
1369 glDeleteRenderbuffers(numRbs, rbs);
1370 glDeleteFramebuffers(1, &fboCopy);
1373 glBindFramebuffer(GL_READ_FRAMEBUFFER, boundReadFbo);
1374 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundDrawFbo);
1378 json.endMember(); // framebuffer
1382 static const GLenum bindings[] = {
1385 GL_PIXEL_PACK_BUFFER_BINDING,
1386 GL_PIXEL_UNPACK_BUFFER_BINDING,
1387 GL_TEXTURE_BINDING_1D,
1388 GL_TEXTURE_BINDING_2D,
1389 GL_TEXTURE_BINDING_3D,
1390 GL_TEXTURE_BINDING_RECTANGLE,
1391 GL_TEXTURE_BINDING_CUBE_MAP,
1392 GL_DRAW_FRAMEBUFFER_BINDING,
1393 GL_READ_FRAMEBUFFER_BINDING,
1394 GL_RENDERBUFFER_BINDING,
1406 #define NUM_BINDINGS sizeof(bindings)/sizeof(bindings[0])
1409 void dumpCurrentContext(std::ostream &os)
1411 JSONWriter json(os);
1414 GLint old_bindings[NUM_BINDINGS];
1415 for (unsigned i = 0; i < NUM_BINDINGS; ++i) {
1416 old_bindings[i] = 0;
1417 glGetIntegerv(bindings[i], &old_bindings[i]);
1421 dumpParameters(json);
1422 dumpShadersUniforms(json);
1424 dumpFramebuffer(json);
1427 for (unsigned i = 0; i < NUM_BINDINGS; ++i) {
1428 GLint new_binding = 0;
1429 glGetIntegerv(bindings[i], &new_binding);
1430 if (new_binding != old_bindings[i]) {
1431 std::cerr << "warning: " << enumToString(bindings[i]) << " was clobbered\n";
1439 } /* namespace glstate */