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

Added libraries that contain a subset of the O3D command buffer code independent on NaCl.
Extracted Upcall interface from CommandBufferEngine.

Now this works in JavaScript to clear the GPU plugin element to a random color:

   // BEGIN_FRAME
   sharedMemory.setInt32(putOffset++, 0x00000201);
   
   // CLEAR
   sharedMemory.setInt32(putOffset++, 0x00000408);
   sharedMemory.setInt32(putOffset++, 7);
   sharedMemory.setFloat(putOffset++, Math.random());
   sharedMemory.setFloat(putOffset++, Math.random());
   sharedMemory.setFloat(putOffset++, Math.random());
   sharedMemory.setFloat(putOffset++, 1);
   sharedMemory.setFloat(putOffset++, 0.5);
   sharedMemory.setInt32(putOffset++, 0);

   // END_FRAME
   sharedMemory.setInt32(putOffset++, 0x00000301);



TEST=none
BUG=none

Review URL: http://codereview.chromium.org/234001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@27098 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 31 insertions, 4 deletions

diff --git a/o3d/command_buffer/service/cross/cmd_buffer_engine.h b/o3d/command_buffer/service/cross/cmd_buffer_engine.h
index 572d98f..479c267 100644
--- a/o3d/command_buffer/service/cross/cmd_buffer_engine.h
+++ b/o3d/command_buffer/service/cross/cmd_buffer_engine.h
@@ -46,7 +46,33 @@ namespace command_buffer {
 
 class BufferRPCImpl;
 
-class CommandBufferEngine : public BufferSyncInterface {
+class CommandBufferUpcallInterface {
+ public:
+  CommandBufferUpcallInterface() {
+  }
+
+  virtual ~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) = 0;
+
+  // 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) = 0;
+
+  // Sets the token value.
+  virtual void set_token(unsigned int token) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CommandBufferUpcallInterface);
+};
+
+class CommandBufferEngine : public BufferSyncInterface,
+                            public CommandBufferUpcallInterface {
  public:
   explicit CommandBufferEngine(AsyncAPIInterface *handler);
   virtual ~CommandBufferEngine();
diff --git a/o3d/command_buffer/service/cross/gapi_decoder.h b/o3d/command_buffer/service/cross/gapi_decoder.h
index a9af75c..e75376c 100644
--- a/o3d/command_buffer/service/cross/gapi_decoder.h
+++ b/o3d/command_buffer/service/cross/gapi_decoder.h
@@ -42,7 +42,7 @@ namespace o3d {
 namespace command_buffer {
 
 class GAPIInterface;
-class CommandBufferEngine;
+class CommandBufferUpcallInterface;
 
 // This class implements the AsyncAPIInterface interface, decoding GAPI
 // commands and sending them to a GAPI interface.
@@ -60,7 +60,7 @@ class GAPIDecoder : public AsyncAPIInterface {
 
   // Sets the engine, to get shared memory buffers from, and to set the token
   // to.
-  void set_engine(CommandBufferEngine *engine) { engine_ = engine; }
+  void set_engine(CommandBufferUpcallInterface *engine) { engine_ = engine; }
  private:
   // Gets the address of shared memory data, given a shared memory ID and an
   // offset. Also checks that the size is consistent with the shared memory
@@ -88,7 +88,7 @@ class GAPIDecoder : public AsyncAPIInterface {
   #undef O3D_COMMAND_BUFFER_CMD_OP
 
   GAPIInterface *gapi_;
-  CommandBufferEngine *engine_;
+  CommandBufferUpcallInterface *engine_;
 };
 
 }  // namespace command_buffer
diff --git a/o3d/command_buffer/service/win/d3d9/gapi_d3d9.h b/o3d/command_buffer/service/win/d3d9/gapi_d3d9.h
index eb301ba..f4a9b4a 100644
--- a/o3d/command_buffer/service/win/d3d9/gapi_d3d9.h
+++ b/o3d/command_buffer/service/win/d3d9/gapi_d3d9.h
@@ -54,6 +54,7 @@ class GAPID3D9 : public GAPIInterface {
   virtual ~GAPID3D9();

 

   void set_hwnd(HWND hwnd) { hwnd_ = hwnd; }

+  HWND hwnd() const { return hwnd_; }

 

   // Initializes the graphics context, bound to a window.

   // Returns: