WebGL GL_RGB emulation to support IOSurfaces on Mac.

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 735 matching lines @@
                 m_drawingBuffer->restoreFramebufferBindings();
         }
 
     private:
         DrawingBuffer* m_drawingBuffer;
         Member<WebGLFramebuffer> m_readFramebufferBinding;
     };
 
     // Errors raised by synthesizeGLError() while the context is lost.
     Vector<GLenum> m_lostContextErrors;
-    // Other errors raised by synthesizeGLError().
+    // Other errors raised by synthesizeGLError(), or errors transfered from the
+    // service side's error queue.
     Vector<GLenum> m_syntheticErrors;
 
     bool m_isWebGL2FormatsTypesAdded;
     bool m_isWebGL2InternalFormatsCopyTexImageAdded;
     bool m_isOESTextureFloatFormatsTypesAdded;
     bool m_isOESTextureHalfFloatFormatsTypesAdded;
     bool m_isWebGLDepthTextureFormatsTypesAdded;
     bool m_isEXTsRGBFormatsTypesAdded;
 
     std::set<GLenum> m_supportedInternalFormats;
@@ skipping 21 matching lines @@
         JustClear,
         // Combine webgl.clear() API with the backbuffer clear, so webgl.clear()
         // doesn't have to call glClear() again.
         CombinedClear
     };
     HowToClear clearIfComposited(GLbitfield clearMask = 0);
 
     // Helper to restore state that clearing the framebuffer may destroy.
     void restoreStateAfterClear();
 
+    // Moves all errors from the service side's error queue into this class's
+    // internal queue |m_syntheticErrors|.
+    void moveGLErrorsToInternalQueue();
+
     // Convert texture internal format.
     GLenum convertTexInternalFormat(GLenum internalformat, GLenum type);
 
     void texImage2DBase(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const void* pixels);
     void texImage2DImpl(GLenum target, GLint level, GLint internalformat, GLenum format, GLenum type, Image*, WebGLImageConversion::ImageHtmlDomSource, bool flipY, bool premultiplyAlpha);
     void texSubImage2DBase(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void* pixels);
     void texSubImage2DImpl(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLenum format, GLenum type, Image*, WebGLImageConversion::ImageHtmlDomSource, bool flipY, bool premultiplyAlpha);
 
     enum TexImageFunctionType {
         TexImage,
@@ skipping 295 matching lines @@
 #endif
 };
 
 DEFINE_TYPE_CASTS(WebGLRenderingContextBase, CanvasRenderingContext, context, context->is3d(), context.is3d());
 
 } // namespace blink
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::WebGLRenderingContextBase::TextureUnitState);
 
 #endif // WebGLRenderingContextBase_h