WebGL: GL_RGB emulation for IOSurface backed textures. [For reference only]

gpu/command_buffer/service/framebuffer_manager.h

Index: gpu/command_buffer/service/framebuffer_manager.h
diff --git a/gpu/command_buffer/service/framebuffer_manager.h b/gpu/command_buffer/service/framebuffer_manager.h
index 67257dafd25d4526363dd4a5bb12493d9140d338..b0ee38992d835ee145919da0a7ca05c3946b508b 100644
--- a/gpu/command_buffer/service/framebuffer_manager.h
+++ b/gpu/command_buffer/service/framebuffer_manager.h
@@ -62,6 +62,10 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
     virtual void AddToSignature(
         TextureManager* texture_manager, std::string* signature) const = 0;
     virtual bool FormsFeedbackLoop(TextureRef* texture, GLint level) const = 0;
+    virtual bool EmulatingRGB() const = 0;
+
+    virtual bool Initialized() const = 0;
+    virtual void SetInitialized(bool initialized) = 0;
 
    protected:
     friend class base::RefCounted<Attachment>;
@@ -76,6 +80,8 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
 
   bool HasUnclearedAttachment(GLenum attachment) const;
   bool HasUnclearedColorAttachments() const;
+  bool HasUninitializedDrawBuffers() const;
+  void SetDrawBuffersAsInitialized();
 
   void ClearUnclearedIntOr3DTexturesOrPartiallyClearedTextures(
       GLES2Decoder* decoder,
@@ -172,6 +178,7 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
 
   // Return true if any draw buffers has an alpha channel.
   bool HasAlphaMRT() const;
+  bool EmulatingRGB() const;
 
   // Return false if any two active color attachments have different internal
   // formats.