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// 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_BROWSER_GPU_PROCESS_HOST_H_
#define CHROME_BROWSER_GPU_PROCESS_HOST_H_
#pragma once
#include <queue>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/linked_ptr.h"
#include "base/threading/non_thread_safe.h"
#include "chrome/browser/browser_child_process_host.h"
#include "chrome/common/gpu_feature_flags.h"
#include "ui/gfx/native_widget_types.h"
class GpuBlacklist;
struct GPUCreateCommandBufferConfig;
class GPUInfo;
namespace IPC {
struct ChannelHandle;
class Message;
}
class GpuProcessHost : public BrowserChildProcessHost,
public base::NonThreadSafe {
public:
// Getter for the singleton. This will return NULL on failure.
static GpuProcessHost* Get();
virtual bool Send(IPC::Message* msg);
// IPC::Channel::Listener implementation.
virtual bool OnMessageReceived(const IPC::Message& message);
typedef Callback2<const IPC::ChannelHandle&, const GPUInfo&>::Type
EstablishChannelCallback;
// Tells the GPU process to create a new channel for communication with a
// renderer. Once the GPU process responds asynchronously with the IPC handle
// and GPUInfo, we call the callback.
void EstablishGpuChannel(
int renderer_id, EstablishChannelCallback* callback);
typedef Callback0::Type SynchronizeCallback;
// Sends a reply message later when the next GpuHostMsg_SynchronizeReply comes
// in.
void Synchronize(SynchronizeCallback* callback);
typedef Callback1<int32>::Type CreateCommandBufferCallback;
// Tells the GPU process to create a new command buffer that draws into the
// window associated with the given renderer.
void CreateViewCommandBuffer(
int32 render_view_id,
int32 renderer_id,
const GPUCreateCommandBufferConfig& init_params,
CreateCommandBufferCallback* callback);
// We need to hop threads when creating the command buffer.
// Let these tasks access our internals.
friend class CVCBThreadHopping;
private:
GpuProcessHost();
virtual ~GpuProcessHost();
bool EnsureInitialized();
bool Init();
bool OnControlMessageReceived(const IPC::Message& message);
// Message handlers.
void OnChannelEstablished(const IPC::ChannelHandle& channel_handle,
const GPUInfo& gpu_info);
void OnSynchronizeReply();
void OnCommandBufferCreated(const int32 route_id);
// Sends outstanding replies to renderer processes. This is only called
// in error situations like the GPU process crashing -- but is necessary
// to prevent the renderer process from hanging.
void SendOutstandingReplies();
virtual bool CanShutdown();
virtual void OnChildDied();
virtual void OnProcessCrashed(int exit_code);
bool CanLaunchGpuProcess() const;
bool LaunchGpuProcess();
bool LoadGpuBlacklist();
bool initialized_;
bool initialized_successfully_;
bool gpu_feature_flags_set_;
scoped_ptr<GpuBlacklist> gpu_blacklist_;
GpuFeatureFlags gpu_feature_flags_;
// These are the channel requests that we have already sent to
// the GPU process, but haven't heard back about yet.
std::queue<linked_ptr<EstablishChannelCallback> > channel_requests_;
// The pending synchronization requests we need to reply to.
std::queue<linked_ptr<SynchronizeCallback> > synchronize_requests_;
// The pending create command buffer requests we need to reply to.
std::queue<linked_ptr<CreateCommandBufferCallback> >
create_command_buffer_requests_;
DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
};
#endif // CHROME_BROWSER_GPU_PROCESS_HOST_H_
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