Added support for opening a GPU command buffer from a renderer processes through a GPU channel.

Probably only works in windows only so far.
TEST=none
BUG=none

Review URL: http://codereview.chromium.org/657046

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@40783 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 62 insertions, 0 deletions

diff --git a/chrome/gpu/gpu_command_buffer_stub.h b/chrome/gpu/gpu_command_buffer_stub.h
new file mode 100644
index 0000000..f1446e8
--- /dev/null
+++ b/chrome/gpu/gpu_command_buffer_stub.h
@@ -0,0 +1,62 @@
+// Copyright (c) 2010 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_GPU_GPU_COMMAND_BUFFER_STUB_H_
+#define CHROME_GPU_GPU_COMMAND_BUFFER_STUB_H_
+
+#if defined(ENABLE_GPU)
+
+#include "app/gfx/native_widget_types.h"
+#include "base/process.h"
+#include "base/ref_counted.h"
+#include "gpu/command_buffer/service/command_buffer_service.h"
+#include "gpu/command_buffer/service/gpu_processor.h"
+#include "ipc/ipc_channel.h"
+#include "ipc/ipc_message.h"
+
+class GpuChannel;
+
+class GpuCommandBufferStub
+    : public IPC::Channel::Listener,
+      public IPC::Message::Sender,
+      public base::RefCountedThreadSafe<GpuCommandBufferStub> {
+ public:
+  GpuCommandBufferStub(GpuChannel* channel,
+                       int32 route_id);
+
+  virtual ~GpuCommandBufferStub();
+
+  // IPC::Channel::Listener implementation:
+  virtual void OnMessageReceived(const IPC::Message& message);
+
+  // IPC::Message::Sender implementation:
+  virtual bool Send(IPC::Message* msg);
+
+  int route_id() const { return route_id_; }
+
+ private:
+  // Message handlers:
+  void OnInitialize(int32 size, base::SharedMemoryHandle* ring_buffer);
+  void OnGetState(gpu::CommandBuffer::State* state);
+  void OnAsyncGetState();
+  void OnFlush(int32 put_offset, gpu::CommandBuffer::State* state);
+  void OnAsyncFlush(int32 put_offset);
+  void OnCreateTransferBuffer(int32 size, int32* id);
+  void OnDestroyTransferBuffer(int32 id);
+  void OnGetTransferBuffer(int32 id,
+                           base::SharedMemoryHandle* transfer_buffer,
+                           uint32* size);
+
+  scoped_refptr<GpuChannel> channel_;
+  int route_id_;
+
+  scoped_ptr<gpu::CommandBufferService> command_buffer_;
+  scoped_refptr<gpu::GPUProcessor> processor_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
+};
+
+#endif  // ENABLE_GPU
+
+#endif  // CHROME_GPU_GPU_COMMAND_BUFFER_STUB_H_