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// 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_
#pragma once
#if defined(ENABLE_GPU)
#include <map>
#include <queue>
#include "base/linked_ptr.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "base/shared_memory.h"
#include "base/task.h"
#include "gfx/size.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::Channel::Listener,
public IPC::Message::Sender {
public:
CommandBufferProxy(IPC::Channel::Sender* channel, int route_id);
virtual ~CommandBufferProxy();
// IPC::Channel::Listener implementation:
virtual void OnMessageReceived(const IPC::Message& message);
virtual void OnChannelError();
// IPC::Message::Sender implementation:
virtual bool Send(IPC::Message* msg);
int route_id() const { return route_id_; }
// CommandBuffer implementation:
virtual bool Initialize(int32 size);
virtual gpu::Buffer GetRingBuffer();
virtual State GetState();
virtual State Flush(int32 put_offset);
virtual void SetGetOffset(int32 get_offset);
virtual int32 CreateTransferBuffer(size_t size);
virtual void DestroyTransferBuffer(int32 id);
virtual gpu::Buffer GetTransferBuffer(int32 handle);
virtual void SetToken(int32 token);
virtual void SetParseError(gpu::error::Error error);
// Asynchronously resizes an offscreen frame buffer.
void ResizeOffscreenFrameBuffer(const gfx::Size& size);
// Set a task that will be invoked the next time the window becomes invalid
// and needs to be repainted. Takes ownership of task.
void SetNotifyRepaintTask(Task* task) {
notify_repaint_task_.reset(task);
}
#if defined(OS_MACOSX)
virtual void SetWindowSize(const gfx::Size& size);
#endif
// Get the last state received from the service without synchronizing.
State GetLastState() {
return last_state_;
}
// Get the state asynchronously. The task is posted when the state is
// updated. Takes ownership of the task object.
void AsyncGetState(Task* completion_task);
// Flush the command buffer asynchronously. The task is posted when the flush
// completes. Takes ownership of the task object.
void AsyncFlush(int32 put_offset, Task* completion_task);
private:
// Message handlers:
void OnUpdateState(gpu::CommandBuffer::State state);
void OnNotifyRepaint();
// As with the service, the client takes ownership of the ring buffer.
int32 num_entries_;
scoped_ptr<base::SharedMemory> ring_buffer_;
// Local cache of id to transfer buffer mapping.
typedef std::map<int32, gpu::Buffer> TransferBufferMap;
TransferBufferMap transfer_buffers_;
// The last cached state received from the service.
State last_state_;
IPC::Channel::Sender* channel_;
int route_id_;
// Pending asynchronous flush callbacks.
typedef std::queue<linked_ptr<Task> > AsyncFlushTaskQueue;
AsyncFlushTaskQueue pending_async_flush_tasks_;
scoped_ptr<Task> notify_repaint_task_;
DISALLOW_COPY_AND_ASSIGN(CommandBufferProxy);
};
#endif // ENABLE_GPU
#endif // CHROME_RENDERER_COMMAND_BUFFER_PROXY_H_
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