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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER
      6 #define CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER
      7 
      8 #include "base/compiler_specific.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "base/synchronization/lock.h"
     11 #include "base/threading/thread_checker.h"
     12 #include "cc/output/context_provider.h"
     13 #include "content/common/content_export.h"
     14 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
     15 #include "webkit/common/gpu/context_provider_web_context.h"
     16 
     17 namespace webkit {
     18 namespace gpu {
     19 class GrContextForWebGraphicsContext3D;
     20 }
     21 }
     22 
     23 namespace content {
     24 
     25 // Implementation of cc::ContextProvider that provides a
     26 // WebGraphicsContext3DCommandBufferImpl context and a GrContext.
     27 class CONTENT_EXPORT ContextProviderCommandBuffer
     28     : NON_EXPORTED_BASE(public webkit::gpu::ContextProviderWebContext) {
     29  public:
     30   static scoped_refptr<ContextProviderCommandBuffer> Create(
     31       scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context3d,
     32       const std::string& debug_name);
     33 
     34   CommandBufferProxyImpl* GetCommandBufferProxy();
     35 
     36   // ContextProviderWebContext implementation.
     37   virtual WebGraphicsContext3DCommandBufferImpl* WebContext3D() OVERRIDE;
     38 
     39   // cc::ContextProvider implementation.
     40   virtual bool BindToCurrentThread() OVERRIDE;
     41   virtual gpu::gles2::GLES2Interface* ContextGL() OVERRIDE;
     42   virtual gpu::ContextSupport* ContextSupport() OVERRIDE;
     43   virtual class GrContext* GrContext() OVERRIDE;
     44   virtual Capabilities ContextCapabilities() OVERRIDE;
     45   virtual bool IsContextLost() OVERRIDE;
     46   virtual void VerifyContexts() OVERRIDE;
     47   virtual void DeleteCachedResources() OVERRIDE;
     48   virtual bool DestroyedOnMainThread() OVERRIDE;
     49   virtual void SetLostContextCallback(
     50       const LostContextCallback& lost_context_callback) OVERRIDE;
     51   virtual void SetMemoryPolicyChangedCallback(
     52       const MemoryPolicyChangedCallback& memory_policy_changed_callback)
     53       OVERRIDE;
     54 
     55  protected:
     56   ContextProviderCommandBuffer(
     57       scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context3d,
     58       const std::string& debug_name);
     59   virtual ~ContextProviderCommandBuffer();
     60 
     61   void OnLostContext();
     62   void OnMemoryAllocationChanged(const gpu::MemoryAllocation& allocation);
     63 
     64  private:
     65   void InitializeCapabilities();
     66 
     67   base::ThreadChecker main_thread_checker_;
     68   base::ThreadChecker context_thread_checker_;
     69 
     70   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context3d_;
     71   scoped_ptr<webkit::gpu::GrContextForWebGraphicsContext3D> gr_context_;
     72 
     73   cc::ContextProvider::Capabilities capabilities_;
     74   std::string debug_name_;
     75 
     76   LostContextCallback lost_context_callback_;
     77   MemoryPolicyChangedCallback memory_policy_changed_callback_;
     78 
     79   base::Lock main_thread_lock_;
     80   bool destroyed_;
     81 
     82   class LostContextCallbackProxy;
     83   scoped_ptr<LostContextCallbackProxy> lost_context_callback_proxy_;
     84 };
     85 
     86 }  // namespace content
     87 
     88 #endif  // CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER
     89