Implement native GMB backbuffers in the GLES2 Command Decoder.

gpu/command_buffer/service/image_factory.h

 // Copyright 2014 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_IMAGE_FACTORY_H_
 #define GPU_COMMAND_BUFFER_SERVICE_IMAGE_FACTORY_H_
 
 #include "base/memory/ref_counted.h"
 #include "gpu/gpu_export.h"
 #include "ui/gfx/geometry/size.h"
@@ skipping 12 matching lines @@
   // Creates a GLImage instance for GPU memory buffer identified by |handle|.
   // |client_id| should be set to the client requesting the creation of instance
   // and can be used by factory implementation to verify access rights.
   virtual scoped_refptr<gl::GLImage> CreateImageForGpuMemoryBuffer(
       const gfx::GpuMemoryBufferHandle& handle,
       const gfx::Size& size,
       gfx::BufferFormat format,
       unsigned internalformat,
       int client_id) = 0;
 
+  // Create an anonymous GLImage backed by a GpuMemoryBuffer that doesn't have a
+  // client_id. It can't be passed to other processes.
+  virtual scoped_refptr<gl::GLImage> CreateAnonymousImage(
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      unsigned internalformat);
+
+  // An image can only be bound to a texture with the appropriate type.
+  virtual unsigned RequiredTextureType();
+
+  // Whether a created image can have format GL_RGB.
+  virtual bool SupportsFormatRGB();
+
  protected:
   virtual ~ImageFactory();
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_IMAGE_FACTORY_H_