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// 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_COMMAND_BUFFER_H_
#define O3D_GPU_PLUGIN_COMMAND_BUFFER_H_
#include "o3d/gpu_plugin/np_utils/dispatched_np_object.h"
namespace o3d {
namespace gpu_plugin {
// An NPObject that implements a shared memory command buffer and a synchronous
// API to manage the put and get pointers.
class CommandBuffer : public DispatchedNPObject {
public:
explicit CommandBuffer(NPP npp);
virtual ~CommandBuffer();
// Create a shared memory buffer of the given size.
virtual bool Initialize(int32 size);
// Gets the shared memory object for the command buffer.
virtual NPObjectPointer<NPObject> GetBuffer();
// The client calls this to update its put offset.
virtual void SetPutOffset(int32 offset);
// The client calls this to get the servers current get offset.
virtual int32 GetGetOffset();
protected:
NP_UTILS_BEGIN_DISPATCHER_CHAIN(CommandBuffer, DispatchedNPObject)
NP_UTILS_DISPATCHER(Initialize, bool(int32))
NP_UTILS_DISPATCHER(SetPutOffset, void(int32))
NP_UTILS_DISPATCHER(GetGetOffset, int32())
NP_UTILS_DISPATCHER(GetBuffer, NPObjectPointer<NPObject>())
NP_UTILS_END_DISPATCHER_CHAIN
private:
NPObjectPointer<NPObject> buffer_object_;
NPSharedMemory* shared_memory_;
};
} // namespace gpu_plugin
} // namespace o3d
#endif // O3D_GPU_PLUGIN_COMMAND_BUFFER_H_
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