Added CommandBufferClient, CommandBufferStub and some IPC messages....

chrome/renderer/command_buffer_proxy.h

+// Copyright (c) 2009 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 CHROME_RENDERER_COMMAND_BUFFER_PROXY_H_
+#define CHROME_RENDERER_COMMAND_BUFFER_PROXY_H_
+
+#if defined(ENABLE_GPU)
+
+#include <map>
+
+#include "base/linked_ptr.h"
+#include "base/ref_counted.h"
+#include "base/scoped_ptr.h"
+#include "base/shared_memory.h"
+#include "gpu/command_buffer/common/command_buffer.h"
+#include "ipc/ipc_channel.h"
+#include "ipc/ipc_message.h"
+
+class PluginChannelHost;
+
+// Client side proxy that forwards messages synchronously to a
+// CommandBufferStub.
+class CommandBufferProxy : public gpu::CommandBuffer,
+                           public IPC::Message::Sender {
+ public:
+  explicit CommandBufferProxy(
+      PluginChannelHost* channel,
+      int route_id);
+  virtual ~CommandBufferProxy();
+
+  // IPC::Message::Sender implementation:
+  virtual bool Send(IPC::Message* msg);
+
+  // CommandBuffer implementation:
+  virtual base::SharedMemory* Initialize(int32 size);
+  virtual base::SharedMemory* GetRingBuffer();
+  virtual int32 GetSize();
+  virtual int32 SyncOffsets(int32 put_offset);
+  virtual int32 GetGetOffset();
+  virtual void SetGetOffset(int32 get_offset);
+  virtual int32 GetPutOffset();
+  virtual void SetPutOffsetChangeCallback(Callback0::Type* callback);
+  virtual int32 CreateTransferBuffer(size_t size);
+  virtual void DestroyTransferBuffer(int32 id);
+  virtual base::SharedMemory* GetTransferBuffer(int32 handle);
+  virtual int32 GetToken();
+  virtual void SetToken(int32 token);
+  virtual int32 ResetParseError();
+  virtual void SetParseError(int32 parse_error);
+  virtual bool GetErrorStatus();
+  virtual void RaiseErrorStatus();
+
+ private:
+  // As with the service, the client takes ownership of the ring buffer.
+  int32 size_;
+  scoped_ptr<base::SharedMemory> ring_buffer_;
+
+  // Local cache of id to transfer buffer mapping.
+  typedef std::map<int32, linked_ptr<base::SharedMemory> > TransferBufferMap;
+  TransferBufferMap transfer_buffers_;
+
+  scoped_refptr<PluginChannelHost> channel_;
+  int route_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(CommandBufferProxy);
+};
+
+#endif  // ENABLE_GPU
+
+#endif  // CHROME_RENDERER_COMMAND_BUFFER_PROXY_H_