Add reference-counting for mailbox textures.

content/common/gpu/texture_image_transport_surface.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 CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_
 #define CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
 #include "content/common/gpu/image_transport_surface.h"
 #include "gpu/command_buffer/service/mailbox_manager.h"
 #include "gpu/command_buffer/service/texture_definition.h"
 #include "gpu/command_buffer/service/texture_manager.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_surface.h"
 
 namespace content {
 class GpuChannelManager;
 
 class TextureImageTransportSurface
     : public ImageTransportSurface,
       public GpuCommandBufferStub::DestructionObserver,
-      public gfx::GLSurface {
+      public gfx::GLSurface,
+      private gpu::gles2::TextureDefinition::Client {
  public:
   TextureImageTransportSurface(GpuChannelManager* manager,
                                GpuCommandBufferStub* stub,
                                const gfx::GLSurfaceHandle& handle);
 
   // gfx::GLSurface implementation.
   virtual bool Initialize() OVERRIDE;
   virtual void Destroy() OVERRIDE;
   virtual bool DeferDraws() OVERRIDE;
   virtual bool Resize(const gfx::Size& size) OVERRIDE;
@@ skipping 38 matching lines @@
   void ConsumeTexture();
 
   static gpu::gles2::TextureDefinition* CreateTextureDefinition(gfx::Size size,
                                                                 int service_id);
 
   // The framebuffer that represents this surface (service id). Allocated lazily
   // in OnMakeCurrent.
   uint32 fbo_id_;
 
   // The current backbuffer.
-  scoped_ptr<gpu::gles2::TextureDefinition> backbuffer_;
+  gpu::gles2::TextureDefinition* backbuffer_;
 
   // The mailbox name for the current backbuffer texture. Needs to be unique per
   // GL texture and is invalid while service_id is zero.
   gpu::gles2::MailboxName mailbox_name_;
 
   // The current size of the GLSurface. Used to disambiguate from the current
   // texture size which might be outdated (since we use two buffers).
   gfx::Size current_size_;
 
   // Whether or not the command buffer stub has been destroyed.
   bool stub_destroyed_;
 
   bool backbuffer_suggested_allocation_;
   bool frontbuffer_suggested_allocation_;
 
   scoped_ptr<ImageTransportHelper> helper_;
   gfx::GLSurfaceHandle handle_;
 
   // The offscreen surface used to make the context current. However note that
   // the actual rendering is always redirected to an FBO.
   scoped_refptr<gfx::GLSurface> surface_;
 
-  // Holds a reference to the underlying context for cleanup.
-  scoped_refptr<gfx::GLContext> context_;
-
   // Whether a SwapBuffers is pending.
   bool is_swap_buffers_pending_;
 
   // Whether we unscheduled command buffer because of pending SwapBuffers.
   bool did_unschedule_;
 
   // Holds a reference to the mailbox manager for cleanup.
   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(TextureImageTransportSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_