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 **************************************************************************/
35 #include "glstate.hpp"
40 #include <Carbon/Carbon.h>
46 typedef int CGSConnectionID;
47 typedef int CGSWindowID;
48 typedef int CGSSurfaceID;
50 CGLError CGLGetSurface(CGLContextObj, CGSConnectionID*, CGSWindowID*, CGSSurfaceID*);
51 OSStatus CGSGetSurfaceBounds(CGSConnectionID, CGWindowID, CGSSurfaceID, CGRect *);
57 #endif /* __APPLE__ */
64 dumpShader(JSONWriter &json, GLuint shader)
70 GLint shader_type = 0;
71 glGetShaderiv(shader, GL_SHADER_TYPE, &shader_type);
76 GLint source_length = 0;
77 glGetShaderiv(shader, GL_SHADER_SOURCE_LENGTH, &source_length);
82 GLchar *source = new GLchar[source_length];
85 glGetShaderSource(shader, source_length, &length, source);
87 json.beginMember(enumToString(shader_type));
88 json.writeString(source);
96 dumpShaderObj(JSONWriter &json, GLhandleARB shaderObj)
102 GLint shader_type = 0;
103 glGetObjectParameterivARB(shaderObj, GL_OBJECT_TYPE_ARB, &shader_type);
108 GLint source_length = 0;
109 glGetObjectParameterivARB(shaderObj, GL_OBJECT_SHADER_SOURCE_LENGTH_ARB, &source_length);
110 if (!source_length) {
114 GLcharARB *source = new GLcharARB[source_length];
117 glGetShaderSource(shaderObj, source_length, &length, source);
119 json.beginMember(enumToString(shader_type));
120 json.writeString(source);
128 dumpCurrentProgram(JSONWriter &json)
131 glGetIntegerv(GL_CURRENT_PROGRAM, &program);
136 GLint attached_shaders = 0;
137 glGetProgramiv(program, GL_ATTACHED_SHADERS, &attached_shaders);
138 if (!attached_shaders) {
142 GLuint *shaders = new GLuint[attached_shaders];
144 glGetAttachedShaders(program, attached_shaders, &count, shaders);
145 for (GLsizei i = 0; i < count; ++ i) {
146 dumpShader(json, shaders[i]);
153 dumpCurrentProgramObj(JSONWriter &json)
155 GLhandleARB programObj = glGetHandleARB(GL_PROGRAM_OBJECT_ARB);
160 GLint attached_shaders = 0;
161 glGetProgramivARB(programObj, GL_OBJECT_ATTACHED_OBJECTS_ARB, &attached_shaders);
162 if (!attached_shaders) {
166 GLhandleARB *shaderObjs = new GLhandleARB[attached_shaders];
168 glGetAttachedObjectsARB(programObj, attached_shaders, &count, shaderObjs);
169 for (GLsizei i = 0; i < count; ++ i) {
170 dumpShaderObj(json, shaderObjs[i]);
172 delete [] shaderObjs;
177 dumpArbProgram(JSONWriter &json, GLenum target)
179 if (!glIsEnabled(target)) {
183 GLint program_length = 0;
184 glGetProgramivARB(target, GL_PROGRAM_LENGTH_ARB, &program_length);
185 if (!program_length) {
189 GLchar *source = new GLchar[program_length + 1];
191 glGetProgramStringARB(target, GL_PROGRAM_STRING_ARB, source);
192 source[program_length] = 0;
194 json.beginMember(enumToString(target));
195 json.writeString(source);
203 dumpShaders(JSONWriter &json)
205 json.beginMember("shaders");
207 dumpCurrentProgram(json);
208 dumpArbProgram(json, GL_FRAGMENT_PROGRAM_ARB);
209 dumpArbProgram(json, GL_VERTEX_PROGRAM_ARB);
211 json.endMember(); //shaders
216 dumpTextureImage(JSONWriter &json, GLenum target, GLint level)
218 GLint width, height = 1, depth = 1;
221 glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
223 if (target != GL_TEXTURE_1D) {
225 glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
226 if (target == GL_TEXTURE_3D) {
228 glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);
232 if (width <= 0 || height <= 0 || depth <= 0) {
237 GLint active_texture = GL_TEXTURE0;
238 glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
239 snprintf(label, sizeof label, "%s, %s, level = %i", enumToString(active_texture), enumToString(target), level);
241 json.beginMember(label);
245 // Tell the GUI this is no ordinary object, but an image
246 json.writeStringMember("__class__", "image");
248 json.writeNumberMember("__width__", width);
249 json.writeNumberMember("__height__", height);
250 json.writeNumberMember("__depth__", depth);
252 // Hardcoded for now, but we could chose types more adequate to the
253 // texture internal format
254 json.writeStringMember("__type__", "uint8");
255 json.writeBoolMember("__normalized__", true);
256 json.writeNumberMember("__channels__", 4);
258 GLubyte *pixels = new GLubyte[depth*width*height*4];
260 glGetTexImage(target, level, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
262 json.beginMember("__data__");
265 Image::writePixelsToBuffer(pixels, width, height, 4, false, &pngBuffer, &pngBufferSize);
266 json.writeBase64(pngBuffer, pngBufferSize);
268 json.endMember(); // __data__
277 dumpTexture(JSONWriter &json, GLenum target, GLenum binding)
279 GLint texture_binding = 0;
280 glGetIntegerv(binding, &texture_binding);
281 if (!glIsEnabled(target) && !texture_binding) {
287 GLint width = 0, height = 0;
288 glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
289 glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
290 if (!width || !height) {
294 if (target == GL_TEXTURE_CUBE_MAP) {
295 for (int face = 0; face < 6; ++face) {
296 dumpTextureImage(json, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, level);
299 dumpTextureImage(json, target, level);
308 dumpTextures(JSONWriter &json)
310 json.beginMember("textures");
312 GLint active_texture = GL_TEXTURE0;
313 glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
314 GLint max_texture_coords = 0;
315 glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);
316 GLint max_combined_texture_image_units = 0;
317 glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);
318 GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);
319 for (GLint unit = 0; unit < max_units; ++unit) {
320 GLenum texture = GL_TEXTURE0 + unit;
321 glActiveTexture(texture);
322 dumpTexture(json, GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D);
323 dumpTexture(json, GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D);
324 dumpTexture(json, GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D);
325 dumpTexture(json, GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE);
326 dumpTexture(json, GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP);
328 glActiveTexture(active_texture);
330 json.endMember(); // textures
335 getDrawableBounds(GLint *width, GLint *height) {
338 HDC hDC = wglGetCurrentDC();
343 HWND hWnd = WindowFromDC(hDC);
346 if (!GetClientRect(hWnd, &rect)) {
350 *width = rect.right - rect.left;
351 *height = rect.bottom - rect.top;
353 #elif defined(__APPLE__)
355 CGLContextObj ctx = CGLGetCurrentContext();
364 if (CGLGetSurface(ctx, &cid, &wid, &sid) != kCGLNoError) {
370 if (CGSGetSurfaceBounds(cid, wid, sid, &rect) != 0) {
374 *width = rect.size.width;
375 *height = rect.size.height;
383 unsigned int w, h, bw, depth;
385 display = glXGetCurrentDisplay();
390 drawable = glXGetCurrentDrawable();
391 if (drawable == None) {
395 if (!XGetGeometry(display, drawable, &root, &x, &y, &w, &h, &bw, &depth)) {
409 getDrawBufferImage(GLenum format) {
410 GLint channels = __gl_format_channels(format);
416 if (!getDrawableBounds(&width, &height)) {
420 Image::Image *image = new Image::Image(width, height, channels, true);
425 GLint drawbuffer = GL_NONE;
426 GLint readbuffer = GL_NONE;
427 glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);
428 glGetIntegerv(GL_READ_BUFFER, &readbuffer);
429 glReadBuffer(drawbuffer);
431 glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
432 glPixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
433 glPixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
434 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
435 glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
436 glPixelStorei(GL_PACK_SKIP_ROWS, 0);
437 glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
438 glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
439 glPixelStorei(GL_PACK_ALIGNMENT, 1);
441 glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, image->pixels);
445 glReadBuffer(readbuffer);
452 dumpDrawBufferImage(JSONWriter &json, GLenum format)
454 GLint channels = __gl_format_channels(format);
458 if (!getDrawableBounds(&width, &height)) {
463 // Tell the GUI this is no ordinary object, but an image
464 json.writeStringMember("__class__", "image");
466 json.writeNumberMember("__width__", width);
467 json.writeNumberMember("__height__", height);
468 json.writeNumberMember("__depth__", 1);
470 // Hardcoded for now, but we could chose types more adequate to the
471 // texture internal format
472 json.writeStringMember("__type__", "uint8");
473 json.writeBoolMember("__normalized__", true);
474 json.writeNumberMember("__channels__", channels);
476 GLubyte *pixels = new GLubyte[width*height*channels];
478 GLint drawbuffer = GL_NONE;
479 GLint readbuffer = GL_NONE;
480 glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);
481 glGetIntegerv(GL_READ_BUFFER, &readbuffer);
482 glReadBuffer(drawbuffer);
484 glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
485 glPixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
486 glPixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
487 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
488 glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
489 glPixelStorei(GL_PACK_SKIP_ROWS, 0);
490 glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
491 glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
492 glPixelStorei(GL_PACK_ALIGNMENT, 1);
494 glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, pixels);
497 glReadBuffer(readbuffer);
499 json.beginMember("__data__");
502 Image::writePixelsToBuffer(pixels, width, height, channels, false, &pngBuffer, &pngBufferSize);
503 //std::cerr <<" Before = "<<(width * height * channels * sizeof *pixels)
504 // <<", after = "<<pngBufferSize << ", ratio = " << double(width * height * channels * sizeof *pixels)/pngBufferSize;
505 json.writeBase64(pngBuffer, pngBufferSize);
507 json.endMember(); // __data__
516 downsampledFramebuffer(GLuint oldFbo, GLint drawbuffer,
517 GLint colorRb, GLint depthRb, GLint stencilRb,
518 GLuint *rbs, GLint *numRbs)
526 glGenFramebuffers(1, &fbo);
527 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
529 glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
530 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
531 GL_RENDERBUFFER_WIDTH, &w);
532 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
533 GL_RENDERBUFFER_HEIGHT, &h);
534 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
535 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
537 glGenRenderbuffers(1, &rbs[*numRbs]);
538 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
539 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
540 glFramebufferRenderbuffer(GL_FRAMEBUFFER, drawbuffer,
541 GL_RENDERBUFFER, rbs[*numRbs]);
543 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
544 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
545 glDrawBuffer(drawbuffer);
546 glReadBuffer(drawbuffer);
547 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
548 GL_COLOR_BUFFER_BIT, GL_NEAREST);
549 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
552 if (stencilRb == depthRb && stencilRb) {
553 //combined depth and stencil buffer
554 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
555 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
556 GL_RENDERBUFFER_WIDTH, &w);
557 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
558 GL_RENDERBUFFER_HEIGHT, &h);
559 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
560 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
562 glGenRenderbuffers(1, &rbs[*numRbs]);
563 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
564 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
565 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
566 GL_RENDERBUFFER, rbs[*numRbs]);
567 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
568 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
569 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
570 GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
571 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
575 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
576 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
577 GL_RENDERBUFFER_WIDTH, &w);
578 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
579 GL_RENDERBUFFER_HEIGHT, &h);
580 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
581 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
583 glGenRenderbuffers(1, &rbs[*numRbs]);
584 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
585 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
586 glFramebufferRenderbuffer(GL_FRAMEBUFFER,
588 GL_RENDERBUFFER, rbs[*numRbs]);
589 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
590 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
591 glDrawBuffer(GL_DEPTH_ATTACHMENT);
592 glReadBuffer(GL_DEPTH_ATTACHMENT);
593 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
594 GL_DEPTH_BUFFER_BIT, GL_NEAREST);
598 glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
599 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
600 GL_RENDERBUFFER_WIDTH, &w);
601 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
602 GL_RENDERBUFFER_HEIGHT, &h);
603 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
604 GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
606 glGenRenderbuffers(1, &rbs[*numRbs]);
607 glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
608 glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
609 glFramebufferRenderbuffer(GL_FRAMEBUFFER,
610 GL_STENCIL_ATTACHMENT,
611 GL_RENDERBUFFER, rbs[*numRbs]);
612 glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
613 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
614 glDrawBuffer(GL_STENCIL_ATTACHMENT);
615 glReadBuffer(GL_STENCIL_ATTACHMENT);
616 glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
617 GL_STENCIL_BUFFER_BIT, GL_NEAREST);
627 dumpDrawBuffers(JSONWriter &json, GLboolean dumpDepth, GLboolean dumpStencil)
629 json.beginMember("GL_RGBA");
630 dumpDrawBufferImage(json, GL_RGBA);
634 json.beginMember("GL_DEPTH_COMPONENT");
635 dumpDrawBufferImage(json, GL_DEPTH_COMPONENT);
640 json.beginMember("GL_STENCIL_INDEX");
641 dumpDrawBufferImage(json, GL_STENCIL_INDEX);
648 dumpFramebuffer(JSONWriter &json)
650 json.beginMember("framebuffer");
653 GLint boundDrawFbo = 0, boundReadFbo = 0;
654 glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &boundDrawFbo);
655 glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &boundReadFbo);
657 GLint depth_bits = 0;
658 glGetIntegerv(GL_DEPTH_BITS, &depth_bits);
659 GLint stencil_bits = 0;
660 glGetIntegerv(GL_STENCIL_BITS, &stencil_bits);
661 dumpDrawBuffers(json, depth_bits, stencil_bits);
663 GLint colorRb, stencilRb, depthRb;
665 glGetIntegerv(GL_RENDERBUFFER_BINDING, &boundRb);
666 GLint drawbuffer = GL_NONE;
667 glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);
669 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
671 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
673 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
675 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
677 glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
678 GL_STENCIL_ATTACHMENT,
679 GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
682 GLint colorSamples, depthSamples, stencilSamples;
686 glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
687 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
688 GL_RENDERBUFFER_SAMPLES, &colorSamples);
689 glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
690 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
691 GL_RENDERBUFFER_SAMPLES, &depthSamples);
692 glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
693 glGetRenderbufferParameteriv(GL_RENDERBUFFER,
694 GL_RENDERBUFFER_SAMPLES, &stencilSamples);
695 glBindRenderbuffer(GL_RENDERBUFFER, boundRb);
697 if (colorSamples || depthSamples || stencilSamples) {
698 //glReadPixels doesnt support multisampled buffers so we need
699 // to blit the fbo to a temporary one
700 fboCopy = downsampledFramebuffer(boundDrawFbo, drawbuffer,
701 colorRb, depthRb, stencilRb,
704 glDrawBuffer(drawbuffer);
705 glReadBuffer(drawbuffer);
707 dumpDrawBuffers(json, depthRb, stencilRb);
710 glBindFramebuffer(GL_FRAMEBUFFER, boundDrawFbo);
711 glBindFramebuffer(GL_READ_FRAMEBUFFER, boundReadFbo);
712 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundDrawFbo);
713 glBindRenderbuffer(GL_RENDERBUFFER_BINDING, boundRb);
714 glDeleteRenderbuffers(numRbs, rbs);
715 glDeleteFramebuffers(1, &fboCopy);
720 json.endMember(); // framebuffer
724 void dumpCurrentContext(std::ostream &os)
727 dumpParameters(json);
730 dumpFramebuffer(json);
734 } /* namespace glstate */