+ if function.name == 'glXBindTexImageEXT':
+ # FIXME: glXBindTexImageEXT gets called frequently, so we should
+ # avoid recording the same data over and over again somehow, e.g.:
+ # - get the pixels before and after glXBindTexImageEXT, and only
+ # emit emitFakeTexture2D when it changes
+ # - keep a global hash of the pixels
+ # FIXME: Handle mipmaps
+ print r'''
+ unsigned glx_target = 0;
+ _glXQueryDrawable(display, drawable, GLX_TEXTURE_TARGET_EXT, &glx_target);
+ GLenum target;
+ switch (glx_target) {
+ // FIXME
+ //case GLX_TEXTURE_1D_EXT:
+ // target = GL_TEXTURE_1D;
+ // break;
+ case GLX_TEXTURE_2D_EXT:
+ target = GL_TEXTURE_2D;
+ break;
+ case GLX_TEXTURE_RECTANGLE_EXT:
+ target = GL_TEXTURE_RECTANGLE;
+ break;
+ default:
+ os::log("apitrace: warning: %s: unsupported GLX_TEXTURE_TARGET_EXT 0x%u\n", __FUNCTION__, glx_target);
+ target = GL_NONE;
+ break;
+ }
+ GLint level = 0;
+ GLint internalformat = GL_NONE;
+ _glGetTexLevelParameteriv(target, level, GL_TEXTURE_INTERNAL_FORMAT, &internalformat);
+ // XXX: GL_TEXTURE_INTERNAL_FORMAT cannot be trusted on NVIDIA
+ // -- it sometimes returns GL_BGRA, even though GL_BGR/BGRA is
+ // not a valid internal format.
+ switch (internalformat) {
+ case GL_BGR:
+ internalformat = GL_RGB;
+ break;
+ case GL_BGRA:
+ internalformat = GL_RGBA;
+ break;
+ }
+ GLint width = 0;
+ _glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
+ GLint height = 0;
+ _glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
+ GLint border = 0;
+ // XXX: We always use GL_RGBA format to read the pixels because:
+ // - some implementations (Mesa) seem to return bogus results
+ // for GLX_TEXTURE_FORMAT_EXT
+ // - hardware usually stores GL_RGB with 32bpp, so it should be
+ // faster to read/write
+ // - it is more robust against GL_(UN)PACK_ALIGNMENT state
+ // changes
+ // The drawback is that traces will be slightly bigger.
+ GLenum format = GL_RGBA;
+ GLenum type = GL_UNSIGNED_BYTE;
+ if (target && internalformat && height && width) {
+ // FIXME: This assumes (UN)PACK state (in particular
+ // GL_(UN)PACK_ROW_LENGTH) is set to its defaults. We
+ // really should temporarily reset the state here (and emit
+ // according fake calls) to cope when its not. At very
+ // least we need a heads up warning that this will cause
+ // problems.
+ GLint alignment = 4;
+ GLint row_stride = _align(width * 4, alignment);
+ GLvoid * pixels = malloc(height * row_stride);
+ _glGetTexImage(target, level, format, type, pixels);
+ '''
+ self.emitFakeTexture2D()
+ print r'''
+ free(pixels);
+ }
+ '''
+