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      1 // Copyright (c) 2012 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 PPAPI_PROXY_COMMAND_BUFFER_PROXY_H_
      6 #define PPAPI_PROXY_COMMAND_BUFFER_PROXY_H_
      7 
      8 #include "base/callback.h"
      9 #include "base/containers/hash_tables.h"
     10 #include "base/memory/scoped_ptr.h"
     11 #include "gpu/command_buffer/client/gpu_control.h"
     12 #include "gpu/command_buffer/common/command_buffer.h"
     13 #include "gpu/command_buffer/common/command_buffer_shared.h"
     14 #include "ppapi/proxy/ppapi_proxy_export.h"
     15 #include "ppapi/shared_impl/host_resource.h"
     16 
     17 namespace IPC {
     18 class Message;
     19 }
     20 
     21 namespace ppapi {
     22 namespace proxy {
     23 
     24 class ProxyChannel;
     25 class SerializedHandle;
     26 
     27 class PPAPI_PROXY_EXPORT PpapiCommandBufferProxy : public gpu::CommandBuffer,
     28                                                    public gpu::GpuControl {
     29  public:
     30   PpapiCommandBufferProxy(const HostResource& resource,
     31                           ProxyChannel* channel,
     32                           const SerializedHandle& shared_state);
     33   virtual ~PpapiCommandBufferProxy();
     34 
     35   // gpu::CommandBuffer implementation:
     36   virtual bool Initialize() OVERRIDE;
     37   virtual State GetLastState() OVERRIDE;
     38   virtual int32 GetLastToken() OVERRIDE;
     39   virtual void Flush(int32 put_offset) OVERRIDE;
     40   virtual void WaitForTokenInRange(int32 start, int32 end) OVERRIDE;
     41   virtual void WaitForGetOffsetInRange(int32 start, int32 end) OVERRIDE;
     42   virtual void SetGetBuffer(int32 transfer_buffer_id) OVERRIDE;
     43   virtual scoped_refptr<gpu::Buffer> CreateTransferBuffer(size_t size,
     44                                                           int32* id) OVERRIDE;
     45   virtual void DestroyTransferBuffer(int32 id) OVERRIDE;
     46 
     47   // gpu::GpuControl implementation:
     48   virtual gpu::Capabilities GetCapabilities() OVERRIDE;
     49   virtual gfx::GpuMemoryBuffer* CreateGpuMemoryBuffer(size_t width,
     50                                                       size_t height,
     51                                                       unsigned internalformat,
     52                                                       unsigned usage,
     53                                                       int32* id) OVERRIDE;
     54   virtual void DestroyGpuMemoryBuffer(int32 id) OVERRIDE;
     55   virtual uint32 InsertSyncPoint() OVERRIDE;
     56   virtual uint32 InsertFutureSyncPoint() OVERRIDE;
     57   virtual void RetireSyncPoint(uint32 sync_point) OVERRIDE;
     58   virtual void SignalSyncPoint(uint32 sync_point,
     59                                const base::Closure& callback) OVERRIDE;
     60   virtual void SignalQuery(uint32 query,
     61                            const base::Closure& callback) OVERRIDE;
     62   virtual void SetSurfaceVisible(bool visible) OVERRIDE;
     63   virtual void Echo(const base::Closure& callback) OVERRIDE;
     64   virtual uint32 CreateStreamTexture(uint32 texture_id) OVERRIDE;
     65 
     66  private:
     67   bool Send(IPC::Message* msg);
     68   void UpdateState(const gpu::CommandBuffer::State& state, bool success);
     69 
     70   // Try to read an updated copy of the state from shared memory.
     71   void TryUpdateState();
     72 
     73   // The shared memory area used to update state.
     74   gpu::CommandBufferSharedState* shared_state() const;
     75 
     76   State last_state_;
     77   scoped_ptr<base::SharedMemory> shared_state_shm_;
     78 
     79   HostResource resource_;
     80   ProxyChannel* channel_;
     81 
     82   base::Closure channel_error_callback_;
     83 
     84   DISALLOW_COPY_AND_ASSIGN(PpapiCommandBufferProxy);
     85 };
     86 
     87 }  // namespace proxy
     88 }  // namespace ppapi
     89 
     90 #endif // PPAPI_PROXY_COMMAND_BUFFER_PROXY_H_
     91