GPUProcessor uses O3D command buffer service to render to a window....

o3d/gpu_plugin/gpu_processor.h

 // Copyright (c) 2006-2008 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 O3D_GPU_PLUGIN_GPU_PROCESSOR_H_
 #define O3D_GPU_PLUGIN_GPU_PROCESSOR_H_
 
-#include "base/ref_counted.h"
+#include "o3d/command_buffer/service/cross/cmd_buffer_engine.h"
+#include "o3d/command_buffer/service/cross/cmd_parser.h"
+#include "o3d/command_buffer/service/cross/gapi_decoder.h"
 #include "o3d/gpu_plugin/command_buffer.h"
 #include "o3d/gpu_plugin/np_utils/np_object_pointer.h"
 
+#if defined(OS_WIN)
+#include "o3d/command_buffer/service/win/d3d9/gapi_d3d9.h"
+#endif
+
 namespace o3d {
 namespace gpu_plugin {
 
 // This class processes commands in a command buffer. It is event driven and
 // posts tasks to the current message loop to do additional work.
-class GPUProcessor : public base::RefCountedThreadSafe<GPUProcessor> {
+class GPUProcessor : public base::RefCountedThreadSafe<GPUProcessor>,
+                     public command_buffer::CommandBufferUpcallInterface {
  public:
-  explicit GPUProcessor(const NPObjectPointer<CommandBuffer>& command_buffer);
+  GPUProcessor(NPP npp,
+               const NPObjectPointer<CommandBuffer>& command_buffer);
+
+#if defined(OS_WIN)
+  // This constructor is for unit tests.
+  GPUProcessor(NPP npp,
+               const NPObjectPointer<CommandBuffer>& command_buffer,
+               command_buffer::GAPID3D9* gapi,
+               command_buffer::GAPIDecoder* decoder,
+               command_buffer::CommandParser* parser,
+               int commands_per_update);
+
+  bool Initialize(HWND hwnd);
+#endif  // OS_WIN
+
+  void Destroy();
 
   void ProcessCommands();
 
 #if defined(OS_WIN)
   void SetWindow(HWND handle, int width, int height);
 #endif
 
-  void DrawRectangle(uint32 color, int left, int top, int right, int bottom);
+  // Implementation of CommandBufferUpcallInterface.
+
+  // Gets the base address of a registered shared memory buffer.
+  // Parameters:
+  //   shm_id: the identifier for the shared memory buffer.
+  virtual void *GetSharedMemoryAddress(unsigned int shm_id);
+
+  // Gets the size of a registered shared memory buffer.
+  // Parameters:
+  //   shm_id: the identifier for the shared memory buffer.
+  virtual size_t GetSharedMemorySize(unsigned int shm_id);
+
+  // Sets the token value.
+  virtual void set_token(unsigned int token);
 
  private:
+  NPP npp_;
   NPObjectPointer<CommandBuffer> command_buffer_;
+  int commands_per_update_;
 
 #if defined(OS_WIN)
-  HWND window_handle_;
-  int window_width_;
-  int window_height_;
+  scoped_ptr<command_buffer::GAPID3D9> gapi_;
+  scoped_ptr<command_buffer::GAPIDecoder> decoder_;
+  scoped_ptr<command_buffer::CommandParser> parser_;
 #endif
 };
 
 }  // namespace gpu_plugin
 }  // namespace o3d
 
 #endif  // O3D_GPU_PLUGIN_GPU_PROCESSOR_H_