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// Copyright (c) 2011 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 CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_
#define CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_
#pragma once
#include <string>
#include <vector>
#include "base/hash_tables.h"
#include "base/memory/scoped_ptr.h"
#include "base/process_util.h"
#include "content/common/gpu/gpu_info.h"
#include "content/common/message_router.h"
#include "content/renderer/gpu/gpu_video_decode_accelerator_host.h"
#include "ipc/ipc_channel_handle.h"
#include "ipc/ipc_sync_channel.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/size.h"
class CommandBufferProxy;
class GpuSurfaceProxy;
class GURL;
class TransportTextureService;
// Encapsulates an IPC channel between the renderer and one plugin process.
// On the plugin side there's a corresponding GpuChannel.
class GpuChannelHost : public IPC::Channel::Listener,
public IPC::Message::Sender,
public base::RefCountedThreadSafe<GpuChannelHost> {
public:
enum State {
// Not yet connected.
kUnconnected,
// Ready to use.
kConnected,
// An error caused the host to become disconnected. Recreate channel to
// reestablish connection.
kLost
};
// Called on the render thread
GpuChannelHost();
virtual ~GpuChannelHost();
// Connect to GPU process channel.
void Connect(const IPC::ChannelHandle& channel_handle,
base::ProcessHandle renderer_process_for_gpu);
State state() const { return state_; }
// Change state to kLost.
void SetStateLost();
// The GPU stats reported by the GPU process.
void set_gpu_info(const GPUInfo& gpu_info);
const GPUInfo& gpu_info() const;
// IPC::Channel::Listener implementation:
virtual bool OnMessageReceived(const IPC::Message& msg);
virtual void OnChannelConnected(int32 peer_pid);
virtual void OnChannelError();
// IPC::Message::Sender implementation:
virtual bool Send(IPC::Message* msg);
// Create and connect to a command buffer in the GPU process.
CommandBufferProxy* CreateViewCommandBuffer(
int render_view_id,
const std::string& allowed_extensions,
const std::vector<int32>& attribs,
const GURL& active_url);
// Create and connect to a command buffer in the GPU process.
CommandBufferProxy* CreateOffscreenCommandBuffer(
const gfx::Size& size,
const std::string& allowed_extensions,
const std::vector<int32>& attribs,
const GURL& active_url);
// Creates a video decoder in the GPU process.
// Returned pointer is owned by the CommandBufferProxy for |route_id|.
GpuVideoDecodeAcceleratorHost* CreateVideoDecoder(
int command_buffer_route_id,
const std::vector<uint32>& configs,
media::VideoDecodeAccelerator::Client* client);
// Destroy a command buffer created by this channel.
void DestroyCommandBuffer(CommandBufferProxy* command_buffer);
// Create a surface in the GPU process. Returns null on failure.
GpuSurfaceProxy* CreateOffscreenSurface(const gfx::Size& size);
// Destroy a surface in the GPU process.
void DestroySurface(GpuSurfaceProxy* surface);
TransportTextureService* transport_texture_service() {
return transport_texture_service_.get();
}
private:
State state_;
GPUInfo gpu_info_;
scoped_ptr<IPC::SyncChannel> channel_;
// Used to implement message routing functionality to CommandBufferProxy
// objects
MessageRouter router_;
// Keep track of all the registered CommandBufferProxies to
// inform about OnChannelError
typedef base::hash_map<int, CommandBufferProxy*> ProxyMap;
ProxyMap proxies_;
// This is a MessageFilter to intercept IPC messages related to transport
// textures. These messages are routed to TransportTextureHost.
scoped_refptr<TransportTextureService> transport_texture_service_;
DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
};
#endif // CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_
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