+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2011 Jose Fonseca
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- **************************************************************************/
-
-
-#include <string.h>
-
-#include <algorithm>
-#include <iostream>
-
-#include "image.hpp"
-#include "json.hpp"
-#include "glproc.hpp"
-#include "glsize.hpp"
-#include "glstate.hpp"
-#include "glstate_internal.hpp"
-
-
-#ifdef __linux__
-#include <dlfcn.h>
-#endif
-
-#ifdef __APPLE__
-
-#include <Carbon/Carbon.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-OSStatus CGSGetSurfaceBounds(CGSConnectionID, CGWindowID, CGSSurfaceID, CGRect *);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* __APPLE__ */
-
-
-/* Change thi to one to force interpreting depth buffers as RGBA, which enables
- * visualizing full dynamic range, until we can transmit HDR images to the GUI */
-#define DEPTH_AS_RGBA 0
-
-
-namespace glstate {
-
-
-struct ImageDesc
-{
- GLint width;
- GLint height;
- GLint depth;
- GLint internalFormat;
-
- inline
- ImageDesc() :
- width(0),
- height(0),
- depth(0),
- internalFormat(GL_NONE)
- {}
-
- inline bool
- valid(void) const {
- return width > 0 && height > 0 && depth > 0;
- }
-};
-
-
-/**
- * OpenGL ES does not support glGetTexLevelParameteriv, but it is possible to
- * probe whether a texture has a given size by crafting a dummy glTexSubImage()
- * call.
- */
-static bool
-probeTextureLevelSizeOES(GLenum target, GLint level, const GLint size[3]) {
- while (glGetError() != GL_NO_ERROR)
- ;
-
- GLenum internalFormat = GL_RGBA;
- GLenum type = GL_UNSIGNED_BYTE;
- GLint dummy = 0;
-
- switch (target) {
- case GL_TEXTURE_2D:
- case GL_TEXTURE_CUBE_MAP:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
- glTexSubImage2D(target, level, size[0], size[1], 0, 0, internalFormat, type, &dummy);
- break;
- case GL_TEXTURE_3D_OES:
- glTexSubImage3DOES(target, level, size[0], size[1], size[2], 0, 0, 0, internalFormat, type, &dummy);
- default:
- assert(0);
- return false;
- }
-
- GLenum error = glGetError();
-
- if (0) {
- std::cerr << "(" << size[0] << ", " << size[1] << ", " << size[2] << ") = " << enumToString(error) << "\n";
- }
-
- if (error == GL_NO_ERROR) {
- return true;
- }
-
- while (glGetError() != GL_NO_ERROR)
- ;
-
- return false;
-}
-
-
-/**
- * Bisect the texture size along an axis.
- *
- * It is assumed that the texture exists.
- */
-static GLint
-bisectTextureLevelSizeOES(GLenum target, GLint level, GLint axis, GLint max) {
- GLint size[3] = {0, 0, 0};
-
- assert(axis < 3);
- assert(max >= 0);
-
- GLint min = 0;
- while (true) {
- GLint test = (min + max) / 2;
- if (test == min) {
- return min;
- }
-
- size[axis] = test;
-
- if (probeTextureLevelSizeOES(target, level, size)) {
- min = test;
- } else {
- max = test;
- }
- }
-}
-
-
-/**
- * Special path to obtain texture size on OpenGL ES, that does not rely on
- * glGetTexLevelParameteriv
- */
-static bool
-getActiveTextureLevelDescOES(Context &context, GLenum target, GLint level, ImageDesc &desc)
-{
- if (target == GL_TEXTURE_1D) {
- // OpenGL ES does not support 1D textures
- return false;
- }
-
- const GLint size[3] = {1, 1, 1};
- if (!probeTextureLevelSizeOES(target, level, size)) {
- return false;
- }
-
- // XXX: mere guess
- desc.internalFormat = GL_RGBA;
-
- GLint maxSize = 0;
- switch (target) {
- case GL_TEXTURE_2D:
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxSize);
- desc.width = bisectTextureLevelSizeOES(target, level, 0, maxSize);
- desc.height = bisectTextureLevelSizeOES(target, level, 1, maxSize);
- desc.depth = 1;
- break;
- case GL_TEXTURE_CUBE_MAP:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
- glGetIntegerv(GL_MAX_CUBE_MAP_TEXTURE_SIZE, &maxSize);
- desc.width = bisectTextureLevelSizeOES(target, level, 0, maxSize);
- desc.height = desc.width;
- desc.depth = 1;
- break;
- case GL_TEXTURE_3D_OES:
- glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE_OES, &maxSize);
- desc.width = bisectTextureLevelSizeOES(target, level, 0, maxSize);
- desc.width = bisectTextureLevelSizeOES(target, level, 1, maxSize);
- desc.depth = bisectTextureLevelSizeOES(target, level, 2, maxSize);
- break;
- default:
- return false;
- }
-
- if (0) {
- std::cerr
- << enumToString(target) << " "
- << level << " "
- << desc.width << "x" << desc.height << "x" << desc.depth
- << "\n";
- }
-
- return desc.valid();
-}
-
-
-static inline bool
-getActiveTextureLevelDesc(Context &context, GLenum target, GLint level, ImageDesc &desc)
-{
- if (context.ES) {
- return getActiveTextureLevelDescOES(context, target, level, desc);
- }
-
- glGetTexLevelParameteriv(target, level, GL_TEXTURE_INTERNAL_FORMAT, &desc.internalFormat);
-
- desc.width = 0;
- glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &desc.width);
-
- if (target == GL_TEXTURE_1D) {
- desc.height = 1;
- desc.depth = 1;
- } else {
- desc.height = 0;
- glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &desc.height);
- if (target != GL_TEXTURE_3D) {
- desc.depth = 1;
- } else {
- desc.depth = 0;
- glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &desc.depth);
- }
- }
-
- return desc.valid();
-}
-
-
-/**
- * OpenGL ES does not support glGetTexImage. Obtain the pixels by attaching the
- * texture to a framebuffer.
- */
-static inline void
-getTexImageOES(GLenum target, GLint level, ImageDesc &desc, GLubyte *pixels)
-{
- memset(pixels, 0x80, desc.height * desc.width * 4);
-
- GLenum texture_binding = GL_NONE;
- switch (target) {
- case GL_TEXTURE_2D:
- texture_binding = GL_TEXTURE_BINDING_2D;
- break;
- case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
- texture_binding = GL_TEXTURE_BINDING_CUBE_MAP;
- break;
- case GL_TEXTURE_3D_OES:
- texture_binding = GL_TEXTURE_BINDING_3D_OES;
- default:
- return;
- }
-
- GLint texture = 0;
- glGetIntegerv(texture_binding, &texture);
- if (!texture) {
- return;
- }
-
- GLint prev_fbo = 0;
- GLuint fbo = 0;
- glGetIntegerv(GL_FRAMEBUFFER_BINDING, &prev_fbo);
- glGenFramebuffers(1, &fbo);
- glBindFramebuffer(GL_FRAMEBUFFER, fbo);
-
- GLenum status;
-
- switch (target) {
- case GL_TEXTURE_2D:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
- case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
- case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
- glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, level);
- status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
- if (status != GL_FRAMEBUFFER_COMPLETE) {
- std::cerr << __FUNCTION__ << ": " << enumToString(status) << "\n";
- }
- glReadPixels(0, 0, desc.width, desc.height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
- break;
- case GL_TEXTURE_3D_OES:
- for (int i = 0; i < desc.depth; i++) {
- glFramebufferTexture3D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_3D, texture, level, i);
- glReadPixels(0, 0, desc.width, desc.height, GL_RGBA, GL_UNSIGNED_BYTE, pixels + 4 * i * desc.width * desc.height);
- }
- break;
- }
-
- glBindFramebuffer(GL_FRAMEBUFFER, prev_fbo);
-
- glDeleteFramebuffers(1, &fbo);
-}
-
-
-static inline GLboolean
-isDepthFormat(GLenum internalFormat)
-{
- switch (internalFormat) {
- case GL_DEPTH_COMPONENT:
- case GL_DEPTH_COMPONENT16:
- case GL_DEPTH_COMPONENT24:
- case GL_DEPTH_COMPONENT32:
- case GL_DEPTH_COMPONENT32F:
- case GL_DEPTH_COMPONENT32F_NV:
- case GL_DEPTH_STENCIL:
- case GL_DEPTH24_STENCIL8:
- case GL_DEPTH32F_STENCIL8:
- case GL_DEPTH32F_STENCIL8_NV:
- return GL_TRUE;
- }
- return GL_FALSE;
-}
-
-
-static inline void
-dumpActiveTextureLevel(JSONWriter &json, Context &context, GLenum target, GLint level)
-{
- ImageDesc desc;
- if (!getActiveTextureLevelDesc(context, target, level, desc)) {
- return;
- }
-
- char label[512];
-
- GLint active_texture = GL_TEXTURE0;
- glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
- snprintf(label, sizeof label, "%s, %s, level = %d",
- enumToString(active_texture), enumToString(target), level);
-
- json.beginMember(label);
-
- json.beginObject();
-
- GLuint channels;
- GLenum format;
- if (!context.ES && isDepthFormat(desc.internalFormat)) {
- format = GL_DEPTH_COMPONENT;
- channels = 1;
- } else {
- format = GL_RGBA;
- channels = 4;
- }
-
- // Tell the GUI this is no ordinary object, but an image
- json.writeStringMember("__class__", "image");
-
- json.writeNumberMember("__width__", desc.width);
- json.writeNumberMember("__height__", desc.height);
- json.writeNumberMember("__depth__", desc.depth);
-
- json.writeStringMember("__format__", enumToString(desc.internalFormat));
-
- // Hardcoded for now, but we could chose types more adequate to the
- // texture internal format
- json.writeStringMember("__type__", "uint8");
- json.writeBoolMember("__normalized__", true);
- json.writeNumberMember("__channels__", channels);
-
- GLubyte *pixels = new GLubyte[desc.depth*desc.width*desc.height*channels];
-
- context.resetPixelPackState();
-
- if (context.ES) {
- getTexImageOES(target, level, desc, pixels);
- } else {
- glGetTexImage(target, level, format, GL_UNSIGNED_BYTE, pixels);
- }
-
- context.restorePixelPackState();
-
- json.beginMember("__data__");
- char *pngBuffer;
- int pngBufferSize;
- image::writePixelsToBuffer(pixels, desc.width, desc.height, channels, true, &pngBuffer, &pngBufferSize);
- json.writeBase64(pngBuffer, pngBufferSize);
- free(pngBuffer);
- json.endMember(); // __data__
-
- delete [] pixels;
- json.endObject();
-}
-
-
-static inline void
-dumpTexture(JSONWriter &json, Context &context, GLenum target, GLenum binding)
-{
- GLint texture_binding = 0;
- glGetIntegerv(binding, &texture_binding);
- if (!glIsEnabled(target) && !texture_binding) {
- return;
- }
-
- GLint level = 0;
- do {
- ImageDesc desc;
- if (!getActiveTextureLevelDesc(context, target, level, desc)) {
- break;
- }
-
- if (target == GL_TEXTURE_CUBE_MAP) {
- for (int face = 0; face < 6; ++face) {
- dumpActiveTextureLevel(json, context, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, level);
- }
- } else {
- dumpActiveTextureLevel(json, context, target, level);
- }
-
- ++level;
- } while(true);
-}
-
-
-void
-dumpTextures(JSONWriter &json, Context &context)
-{
- json.beginMember("textures");
- json.beginObject();
- GLint active_texture = GL_TEXTURE0;
- glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
-
- GLint max_texture_coords = 0;
- glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);
- GLint max_combined_texture_image_units = 0;
- glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);
- GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);
-
- /*
- * At least the Android software GL implementation doesn't return the
- * proper value for this, but rather returns 0. The GL(ES) specification
- * mandates a minimum value of 2, so use this as a fall-back value.
- */
- max_units = std::min(max_units, 2);
-
- for (GLint unit = 0; unit < max_units; ++unit) {
- GLenum texture = GL_TEXTURE0 + unit;
- glActiveTexture(texture);
- dumpTexture(json, context, GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D);
- dumpTexture(json, context, GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D);
- dumpTexture(json, context, GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D);
- dumpTexture(json, context, GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE);
- dumpTexture(json, context, GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP);
- }
- glActiveTexture(active_texture);
- json.endObject();
- json.endMember(); // textures
-}
-
-
-static bool
-getDrawableBounds(GLint *width, GLint *height) {
-#if defined(__linux__)
- if (dlsym(RTLD_DEFAULT, "eglGetCurrentContext")) {
- EGLContext currentContext = eglGetCurrentContext();
- if (currentContext == EGL_NO_CONTEXT) {
- return false;
- }
-
- EGLSurface currentSurface = eglGetCurrentSurface(EGL_DRAW);
- if (currentSurface == EGL_NO_SURFACE) {
- return false;
- }
-
- EGLDisplay currentDisplay = eglGetCurrentDisplay();
- if (currentDisplay == EGL_NO_DISPLAY) {
- return false;
- }
-
- if (!eglQuerySurface(currentDisplay, currentSurface, EGL_WIDTH, width) ||
- !eglQuerySurface(currentDisplay, currentSurface, EGL_HEIGHT, height)) {
- return false;
- }
-
- return true;
- }
-#endif
-
-#if defined(_WIN32)
-
- HDC hDC = wglGetCurrentDC();
- if (!hDC) {
- return false;
- }
-
- HWND hWnd = WindowFromDC(hDC);
- RECT rect;
-
- if (!GetClientRect(hWnd, &rect)) {
- return false;
- }
-
- *width = rect.right - rect.left;
- *height = rect.bottom - rect.top;
- return true;
-
-#elif defined(__APPLE__)
-
- CGLContextObj ctx = CGLGetCurrentContext();
- if (ctx == NULL) {
- return false;
- }
-
- CGSConnectionID cid;
- CGSWindowID wid;
- CGSSurfaceID sid;
-
- if (CGLGetSurface(ctx, &cid, &wid, &sid) != kCGLNoError) {
- return false;
- }
-
- CGRect rect;
-
- if (CGSGetSurfaceBounds(cid, wid, sid, &rect) != 0) {
- return false;
- }
-
- *width = rect.size.width;
- *height = rect.size.height;
- return true;
-
-#elif defined(HAVE_X11)
-
- Display *display;
- Drawable drawable;
- Window root;
- int x, y;
- unsigned int w, h, bw, depth;
-
- display = glXGetCurrentDisplay();
- if (!display) {
- return false;
- }
-
- drawable = glXGetCurrentDrawable();
- if (drawable == None) {
- return false;
- }
-
- if (!XGetGeometry(display, drawable, &root, &x, &y, &w, &h, &bw, &depth)) {
- return false;
- }
-
- *width = w;
- *height = h;
- return true;
-
-#else
-
- return false;
-
-#endif
-}
-
-
-static const GLenum texture_bindings[][2] = {
- {GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D},
- {GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D},
- {GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D},
- {GL_TEXTURE_RECTANGLE, GL_TEXTURE_BINDING_RECTANGLE},
- {GL_TEXTURE_CUBE_MAP, GL_TEXTURE_BINDING_CUBE_MAP}
-};
-
-
-static bool
-bindTexture(GLint texture, GLenum &target, GLint &bound_texture)
-{
-
- for (unsigned i = 0; i < sizeof(texture_bindings)/sizeof(texture_bindings[0]); ++i) {
- target = texture_bindings[i][0];
-
- GLenum binding = texture_bindings[i][1];
-
- while (glGetError() != GL_NO_ERROR)
- ;
-
- glGetIntegerv(binding, &bound_texture);
- glBindTexture(target, texture);
-
- if (glGetError() == GL_NO_ERROR) {
- return true;
- }
-
- glBindTexture(target, bound_texture);
- }
-
- target = GL_NONE;
-
- return false;
-}
-
-
-static bool
-getTextureLevelDesc(Context &context, GLint texture, GLint level, ImageDesc &desc)
-{
- GLenum target;
- GLint bound_texture = 0;
- if (!bindTexture(texture, target, bound_texture)) {
- return false;
- }
-
- getActiveTextureLevelDesc(context, target, level, desc);
-
- glBindTexture(target, bound_texture);
-
- return desc.valid();
-}
-
-
-static bool
-getBoundRenderbufferDesc(Context &context, ImageDesc &desc)
-{
- glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &desc.width);
- glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &desc.height);
- desc.depth = 1;
-
- glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_INTERNAL_FORMAT, &desc.internalFormat);
-
- return desc.valid();
-}
-
-
-static bool
-getRenderbufferDesc(Context &context, GLint renderbuffer, ImageDesc &desc)
-{
- GLint bound_renderbuffer = 0;
- glGetIntegerv(GL_RENDERBUFFER_BINDING, &bound_renderbuffer);
- glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
-
- getBoundRenderbufferDesc(context, desc);
-
- glBindRenderbuffer(GL_RENDERBUFFER, bound_renderbuffer);
-
- return desc.valid();
-}
-
-
-static bool
-getFramebufferAttachmentDesc(Context &context, GLenum target, GLenum attachment, ImageDesc &desc)
-{
- GLint object_type = GL_NONE;
- glGetFramebufferAttachmentParameteriv(target, attachment,
- GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE,
- &object_type);
- if (object_type == GL_NONE) {
- return false;
- }
-
- GLint object_name = 0;
- glGetFramebufferAttachmentParameteriv(target, attachment,
- GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
- &object_name);
- if (object_name == 0) {
- return false;
- }
-
- if (object_type == GL_RENDERBUFFER) {
- return getRenderbufferDesc(context, object_name, desc);
- } else if (object_type == GL_TEXTURE) {
- GLint texture_level = 0;
- glGetFramebufferAttachmentParameteriv(target, attachment,
- GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL,
- &texture_level);
- return getTextureLevelDesc(context, object_name, texture_level, desc);
- } else {
- std::cerr << "warning: unexpected GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE = " << object_type << "\n";
- return false;
- }
-}
-
-
-
-image::Image *
-getDrawBufferImage() {
- GLenum format = GL_RGB;
- GLint channels = __gl_format_channels(format);
- if (channels > 4) {
- return NULL;
- }
-
- Context context;
-
- GLenum framebuffer_binding;
- GLenum framebuffer_target;
- if (context.ES) {
- framebuffer_binding = GL_FRAMEBUFFER_BINDING;
- framebuffer_target = GL_FRAMEBUFFER;
- } else {
- framebuffer_binding = GL_DRAW_FRAMEBUFFER_BINDING;
- framebuffer_target = GL_DRAW_FRAMEBUFFER;
- }
-
- GLint draw_framebuffer = 0;
- glGetIntegerv(framebuffer_binding, &draw_framebuffer);
-
- GLint draw_buffer = GL_NONE;
- ImageDesc desc;
- if (draw_framebuffer) {
- if (context.ARB_draw_buffers) {
- glGetIntegerv(GL_DRAW_BUFFER0, &draw_buffer);
- if (draw_buffer == GL_NONE) {
- return NULL;
- }
- }
-
- if (!getFramebufferAttachmentDesc(context, framebuffer_target, draw_buffer, desc)) {
- return NULL;
- }
- } else {
- if (!context.ES) {
- glGetIntegerv(GL_DRAW_BUFFER, &draw_buffer);
- if (draw_buffer == GL_NONE) {
- return NULL;
- }
- }
-
- if (!getDrawableBounds(&desc.width, &desc.height)) {
- return NULL;
- }
-
- desc.depth = 1;
- }
-
- GLenum type = GL_UNSIGNED_BYTE;
-
-#if DEPTH_AS_RGBA
- if (format == GL_DEPTH_COMPONENT) {
- type = GL_UNSIGNED_INT;
- channels = 4;
- }
-#endif
-
- image::Image *image = new image::Image(desc.width, desc.height, channels, true);
- if (!image) {
- return NULL;
- }
-
- while (glGetError() != GL_NO_ERROR) {}
-
- GLint read_framebuffer = 0;
- GLint read_buffer = GL_NONE;
- if (!context.ES) {
- glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_framebuffer);
- glBindFramebuffer(GL_READ_FRAMEBUFFER, draw_framebuffer);
-
- glGetIntegerv(GL_READ_BUFFER, &read_buffer);
- glReadBuffer(draw_buffer);
- }
-
- // TODO: reset imaging state too
- context.resetPixelPackState();
-
- glReadPixels(0, 0, desc.width, desc.height, format, type, image->pixels);
-
- context.restorePixelPackState();
-
- if (!context.ES) {
- glReadBuffer(read_buffer);
- glBindFramebuffer(GL_READ_FRAMEBUFFER, read_framebuffer);
- }
-
- GLenum error = glGetError();
- if (error != GL_NO_ERROR) {
- do {
- std::cerr << "warning: " << enumToString(error) << " while getting snapshot\n";
- error = glGetError();
- } while(error != GL_NO_ERROR);
- delete image;
- return NULL;
- }
-
- return image;
-}
-
-
-/**
- * Dump the image of the currently bound read buffer.
- */
-static inline void
-dumpReadBufferImage(JSONWriter &json, GLint width, GLint height, GLenum format,
- GLint internalFormat = GL_NONE)
-{
- GLint channels = __gl_format_channels(format);
-
- Context context;
-
- json.beginObject();
-
- // Tell the GUI this is no ordinary object, but an image
- json.writeStringMember("__class__", "image");
-
- json.writeNumberMember("__width__", width);
- json.writeNumberMember("__height__", height);
- json.writeNumberMember("__depth__", 1);
-
- json.writeStringMember("__format__", enumToString(internalFormat));
-
- // Hardcoded for now, but we could chose types more adequate to the
- // texture internal format
- json.writeStringMember("__type__", "uint8");
- json.writeBoolMember("__normalized__", true);
- json.writeNumberMember("__channels__", channels);
-
- GLenum type = GL_UNSIGNED_BYTE;
-
-#if DEPTH_AS_RGBA
- if (format == GL_DEPTH_COMPONENT) {
- type = GL_UNSIGNED_INT;
- channels = 4;
- }
-#endif
-
- GLubyte *pixels = new GLubyte[width*height*channels];
-
- // TODO: reset imaging state too
- context.resetPixelPackState();
-
- glReadPixels(0, 0, width, height, format, type, pixels);
-
- context.restorePixelPackState();
-
- json.beginMember("__data__");
- char *pngBuffer;
- int pngBufferSize;
- image::writePixelsToBuffer(pixels, width, height, channels, true, &pngBuffer, &pngBufferSize);
- //std::cerr <<" Before = "<<(width * height * channels * sizeof *pixels)
- // <<", after = "<<pngBufferSize << ", ratio = " << double(width * height * channels * sizeof *pixels)/pngBufferSize;
- json.writeBase64(pngBuffer, pngBufferSize);
- free(pngBuffer);
- json.endMember(); // __data__
-
- delete [] pixels;
- json.endObject();
-}
-
-
-static inline GLuint
-downsampledFramebuffer(Context &context,
- GLuint oldFbo, GLint drawbuffer,
- GLint colorRb, GLint depthRb, GLint stencilRb,
- GLuint *rbs, GLint *numRbs)
-{
- GLuint fbo;
-
-
- *numRbs = 0;
-
- glGenFramebuffers(1, &fbo);
- glBindFramebuffer(GL_FRAMEBUFFER, fbo);
-
- {
- // color buffer
- ImageDesc desc;
- glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
- getBoundRenderbufferDesc(context, desc);
-
- glGenRenderbuffers(1, &rbs[*numRbs]);
- glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
- glRenderbufferStorage(GL_RENDERBUFFER, desc.internalFormat, desc.width, desc.height);
- glFramebufferRenderbuffer(GL_FRAMEBUFFER, drawbuffer,
- GL_RENDERBUFFER, rbs[*numRbs]);
-
- glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
- glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
- glDrawBuffer(drawbuffer);
- glReadBuffer(drawbuffer);
- glBlitFramebuffer(0, 0, desc.width, desc.height, 0, 0, desc.width, desc.height,
- GL_COLOR_BUFFER_BIT, GL_NEAREST);
- glBindFramebuffer(GL_FRAMEBUFFER, fbo);
- ++*numRbs;
- }
-
- if (stencilRb == depthRb && stencilRb) {
- //combined depth and stencil buffer
- ImageDesc desc;
- glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
- getBoundRenderbufferDesc(context, desc);
-
- glGenRenderbuffers(1, &rbs[*numRbs]);
- glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
- glRenderbufferStorage(GL_RENDERBUFFER, desc.internalFormat, desc.width, desc.height);
- glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
- GL_RENDERBUFFER, rbs[*numRbs]);
- glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
- glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
- glBlitFramebuffer(0, 0, desc.width, desc.height, 0, 0, desc.width, desc.height,
- GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
- glBindFramebuffer(GL_FRAMEBUFFER, fbo);
- ++*numRbs;
- } else {
- if (depthRb) {
- ImageDesc desc;
- glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
- getBoundRenderbufferDesc(context, desc);
-
- glGenRenderbuffers(1, &rbs[*numRbs]);
- glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
- glRenderbufferStorage(GL_RENDERBUFFER, desc.internalFormat, desc.width, desc.height);
- glFramebufferRenderbuffer(GL_FRAMEBUFFER,
- GL_DEPTH_ATTACHMENT,
- GL_RENDERBUFFER, rbs[*numRbs]);
- glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
- glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
- glDrawBuffer(GL_DEPTH_ATTACHMENT);
- glReadBuffer(GL_DEPTH_ATTACHMENT);
- glBlitFramebuffer(0, 0, desc.width, desc.height, 0, 0, desc.width, desc.height,
- GL_DEPTH_BUFFER_BIT, GL_NEAREST);
- ++*numRbs;
- }
- if (stencilRb) {
- ImageDesc desc;
- glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
- getBoundRenderbufferDesc(context, desc);
-
- glGenRenderbuffers(1, &rbs[*numRbs]);
- glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
- glRenderbufferStorage(GL_RENDERBUFFER, desc.internalFormat, desc.width, desc.height);
- glFramebufferRenderbuffer(GL_FRAMEBUFFER,
- GL_STENCIL_ATTACHMENT,
- GL_RENDERBUFFER, rbs[*numRbs]);
- glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
- glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
- glDrawBuffer(GL_STENCIL_ATTACHMENT);
- glReadBuffer(GL_STENCIL_ATTACHMENT);
- glBlitFramebuffer(0, 0, desc.width, desc.height, 0, 0, desc.width, desc.height,
- GL_STENCIL_BUFFER_BIT, GL_NEAREST);
- ++*numRbs;
- }
- }
-
- return fbo;
-}
-
-
-/**
- * Dump images of current draw drawable/window.
- */
-static void
-dumpDrawableImages(JSONWriter &json, Context &context)
-{
- GLint width, height;
-
- if (!getDrawableBounds(&width, &height)) {
- return;
- }
-
- GLint draw_buffer = GL_NONE;
- if (context.ES) {
- draw_buffer = GL_BACK;
- } else {
- glGetIntegerv(GL_DRAW_BUFFER, &draw_buffer);
- glReadBuffer(draw_buffer);
- }
-
- if (draw_buffer != GL_NONE) {
- GLint read_buffer = GL_NONE;
- if (!context.ES) {
- glGetIntegerv(GL_READ_BUFFER, &read_buffer);
- }
-
- GLint alpha_bits = 0;
-#if 0
- // XXX: Ignore alpha until we are able to match the traced visual
- glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
-#endif
- GLenum format = alpha_bits ? GL_RGBA : GL_RGB;
- json.beginMember(enumToString(draw_buffer));
- dumpReadBufferImage(json, width, height, format);
- json.endMember();
-
- if (!context.ES) {
- glReadBuffer(read_buffer);
- }
- }
-
- if (!context.ES) {
- GLint depth_bits = 0;
- glGetIntegerv(GL_DEPTH_BITS, &depth_bits);
- if (depth_bits) {
- json.beginMember("GL_DEPTH_COMPONENT");
- dumpReadBufferImage(json, width, height, GL_DEPTH_COMPONENT);
- json.endMember();
- }
-
- GLint stencil_bits = 0;
- glGetIntegerv(GL_STENCIL_BITS, &stencil_bits);
- if (stencil_bits) {
- json.beginMember("GL_STENCIL_INDEX");
- dumpReadBufferImage(json, width, height, GL_STENCIL_INDEX);
- json.endMember();
- }
- }
-}
-
-
-/**
- * Dump the specified framebuffer attachment.
- *
- * In the case of a color attachment, it assumes it is already bound for read.
- */
-static void
-dumpFramebufferAttachment(JSONWriter &json, Context &context, GLenum target, GLenum attachment, GLenum format)
-{
- ImageDesc desc;
- if (!getFramebufferAttachmentDesc(context, target, attachment, desc)) {
- return;
- }
-
- json.beginMember(enumToString(attachment));
- dumpReadBufferImage(json, desc.width, desc.height, format, desc.internalFormat);
- json.endMember();
-}
-
-
-static void
-dumpFramebufferAttachments(JSONWriter &json, Context &context, GLenum target)
-{
- GLint read_framebuffer = 0;
- glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_framebuffer);
-
- GLint read_buffer = GL_NONE;
- glGetIntegerv(GL_READ_BUFFER, &read_buffer);
-
- GLint max_draw_buffers = 1;
- glGetIntegerv(GL_MAX_DRAW_BUFFERS, &max_draw_buffers);
- GLint max_color_attachments = 0;
- glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, &max_color_attachments);
-
- for (GLint i = 0; i < max_draw_buffers; ++i) {
- GLint draw_buffer = GL_NONE;
- glGetIntegerv(GL_DRAW_BUFFER0 + i, &draw_buffer);
- if (draw_buffer != GL_NONE) {
- glReadBuffer(draw_buffer);
- GLint attachment;
- if (draw_buffer >= GL_COLOR_ATTACHMENT0 && draw_buffer < GL_COLOR_ATTACHMENT0 + max_color_attachments) {
- attachment = draw_buffer;
- } else {
- std::cerr << "warning: unexpected GL_DRAW_BUFFER" << i << " = " << draw_buffer << "\n";
- attachment = GL_COLOR_ATTACHMENT0;
- }
- GLint alpha_size = 0;
- glGetFramebufferAttachmentParameteriv(target, attachment,
- GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE,
- &alpha_size);
- GLenum format = alpha_size ? GL_RGBA : GL_RGB;
- dumpFramebufferAttachment(json, context, target, attachment, format);
- }
- }
-
- glReadBuffer(read_buffer);
-
- if (!context.ES) {
- dumpFramebufferAttachment(json, context, target, GL_DEPTH_ATTACHMENT, GL_DEPTH_COMPONENT);
- dumpFramebufferAttachment(json, context, target, GL_STENCIL_ATTACHMENT, GL_STENCIL_INDEX);
- }
-
- glBindFramebuffer(GL_READ_FRAMEBUFFER, read_framebuffer);
-}
-
-
-void
-dumpFramebuffer(JSONWriter &json, Context &context)
-{
- json.beginMember("framebuffer");
- json.beginObject();
-
- GLint boundDrawFbo = 0, boundReadFbo = 0;
- glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &boundDrawFbo);
- glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &boundReadFbo);
- if (!boundDrawFbo) {
- dumpDrawableImages(json, context);
- } else if (context.ES) {
- dumpFramebufferAttachments(json, context, GL_FRAMEBUFFER);
- } else {
- GLint colorRb = 0, stencilRb = 0, depthRb = 0;
- GLint draw_buffer0 = GL_NONE;
- glGetIntegerv(GL_DRAW_BUFFER0, &draw_buffer0);
- bool multisample = false;
-
- GLint boundRb = 0;
- glGetIntegerv(GL_RENDERBUFFER_BINDING, &boundRb);
-
- GLint object_type;
- glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, draw_buffer0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
- if (object_type == GL_RENDERBUFFER) {
- glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, draw_buffer0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &colorRb);
- glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
- GLint samples = 0;
- glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
- if (samples) {
- multisample = true;
- }
- }
-
- glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
- if (object_type == GL_RENDERBUFFER) {
- glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &depthRb);
- glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
- GLint samples = 0;
- glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
- if (samples) {
- multisample = true;
- }
- }
-
- glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &object_type);
- if (object_type == GL_RENDERBUFFER) {
- glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &stencilRb);
- glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
- GLint samples = 0;
- glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
- if (samples) {
- multisample = true;
- }
- }
-
- glBindRenderbuffer(GL_RENDERBUFFER, boundRb);
-
- GLuint rbs[3];
- GLint numRbs = 0;
- GLuint fboCopy = 0;
-
- if (multisample) {
- // glReadPixels doesnt support multisampled buffers so we need
- // to blit the fbo to a temporary one
- fboCopy = downsampledFramebuffer(context,
- boundDrawFbo, draw_buffer0,
- colorRb, depthRb, stencilRb,
- rbs, &numRbs);
- }
-
- dumpFramebufferAttachments(json, context, GL_DRAW_FRAMEBUFFER);
-
- if (multisample) {
- glBindRenderbuffer(GL_RENDERBUFFER_BINDING, boundRb);
- glDeleteRenderbuffers(numRbs, rbs);
- glDeleteFramebuffers(1, &fboCopy);
- }
-
- glBindFramebuffer(GL_READ_FRAMEBUFFER, boundReadFbo);
- glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundDrawFbo);
- }
-
- json.endObject();
- json.endMember(); // framebuffer
-}
-
-
-} /* namespace glstate */
projects / apitrace / blobdiff