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

gpu/command_buffer/service/framebuffer_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 44 matching lines @@
     virtual bool Is3D() const = 0;
     virtual bool CanRenderTo(const FeatureInfo* feature_info) const = 0;
     virtual void DetachFromFramebuffer(Framebuffer* framebuffer) const = 0;
     virtual bool ValidForAttachmentType(GLenum attachment_type,
                                         ContextType context_type,
                                         uint32_t max_color_attachments) = 0;
     virtual size_t GetSignatureSize(TextureManager* texture_manager) const = 0;
     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>;
     virtual ~Attachment() {}
   };
 
   Framebuffer(FramebufferManager* manager, GLuint service_id);
 
   GLuint service_id() const {
     return service_id_;
   }
 
   bool HasUnclearedAttachment(GLenum attachment) const;
   bool HasUnclearedColorAttachments() const;
+  bool HasUninitializedDrawBuffers() const;
+  void SetDrawBuffersAsInitialized();
 
   void ClearUnclearedIntOr3DTexturesOrPartiallyClearedTextures(
       GLES2Decoder* decoder,
       TextureManager* texture_manager);
 
   bool HasUnclearedIntRenderbufferAttachments() const;
 
   void ClearUnclearedIntRenderbufferAttachments(
     RenderbufferManager* renderbuffer_manager);
 
@@ skipping 76 matching lines @@
   // draw buffer for glClear().
   // Return true if the DrawBuffers() is actually called.
   bool PrepareDrawBuffersForClear() const;
 
   // Restore draw buffers states that have been changed in
   // PrepareDrawBuffersForClear().
   void RestoreDrawBuffersAfterClear() const;
 
   // 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.
   bool HasSameInternalFormatsMRT() const;
 
   void set_read_buffer(GLenum read_buffer) {
     read_buffer_ = read_buffer;
   }
 
   GLenum read_buffer() const {
@@ skipping 134 matching lines @@
 
   scoped_refptr<FramebufferCompletenessCache> framebuffer_combo_complete_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(FramebufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_