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// Copyright (c) 2012 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_COMMON_GPU_GPU_CHANNEL_H_
#define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
#pragma once
#include <deque>
#include <string>
#include "base/id_map.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/process.h"
#include "build/build_config.h"
#include "content/common/gpu/gpu_command_buffer_stub.h"
#include "content/common/gpu/gpu_memory_manager.h"
#include "content/common/message_router.h"
#include "ipc/ipc_sync_channel.h"
#include "ui/gfx/gl/gl_share_group.h"
#include "ui/gfx/gl/gpu_preference.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/size.h"
class GpuChannelManager;
struct GPUCreateCommandBufferConfig;
class GpuWatchdog;
namespace base {
class MessageLoopProxy;
class WaitableEvent;
}
// Encapsulates an IPC channel between the GPU process and one renderer
// process. On the renderer side there's a corresponding GpuChannelHost.
class GpuChannel : public IPC::Channel::Listener,
public IPC::Message::Sender,
public base::RefCountedThreadSafe<GpuChannel> {
public:
// Takes ownership of the renderer process handle.
GpuChannel(GpuChannelManager* gpu_channel_manager,
GpuWatchdog* watchdog,
gfx::GLShareGroup* share_group,
int client_id,
bool software);
virtual ~GpuChannel();
bool Init(base::MessageLoopProxy* io_message_loop,
base::WaitableEvent* shutdown_event);
// Get the GpuChannelManager that owns this channel.
GpuChannelManager* gpu_channel_manager() const {
return gpu_channel_manager_;
}
// Returns the name of the associated IPC channel.
std::string GetChannelName();
#if defined(OS_POSIX)
int TakeRendererFileDescriptor();
#endif // defined(OS_POSIX)
base::ProcessHandle renderer_process() const {
return renderer_process_;
}
// IPC::Channel::Listener implementation:
virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
virtual void OnChannelError() OVERRIDE;
virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
// IPC::Message::Sender implementation:
virtual bool Send(IPC::Message* msg) OVERRIDE;
virtual void AppendAllCommandBufferStubs(
std::vector<GpuCommandBufferStubBase*>& stubs);
// This is called when a command buffer transitions from the unscheduled
// state to the scheduled state, which potentially means the channel
// transitions from the unscheduled to the scheduled state. When this occurs
// deferred IPC messaged are handled.
void OnScheduled();
void CreateViewCommandBuffer(
const gfx::GLSurfaceHandle& window,
int32 surface_id,
const GPUCreateCommandBufferConfig& init_params,
int32* route_id);
gfx::GLShareGroup* share_group() const { return share_group_.get(); }
GpuCommandBufferStub* LookupCommandBuffer(int32 route_id);
void LoseAllContexts();
// Destroy channel and all contained contexts.
void DestroySoon();
// Generate a route ID guaranteed to be unique for this channel.
int GenerateRouteID();
// Called to add/remove a listener for a particular message routing ID.
void AddRoute(int32 route_id, IPC::Channel::Listener* listener);
void RemoveRoute(int32 route_id);
// Indicates whether newly created contexts should prefer the
// discrete GPU even if they would otherwise use the integrated GPU.
bool ShouldPreferDiscreteGpu() const;
private:
void OnDestroy();
bool OnControlMessageReceived(const IPC::Message& msg);
void HandleMessage();
void PollWork(int route_id);
void ScheduleDelayedWork(GpuCommandBufferStub *stub, int64 delay);
// Message handlers.
void OnInitialize(base::ProcessHandle renderer_process);
void OnCreateOffscreenCommandBuffer(
const gfx::Size& size,
const GPUCreateCommandBufferConfig& init_params,
IPC::Message* reply_message);
void OnDestroyCommandBuffer(int32 route_id, IPC::Message* reply_message);
void OnWillGpuSwitchOccur(bool is_creating_context,
gfx::GpuPreference gpu_preference,
IPC::Message* reply_message);
void OnCloseChannel();
void WillCreateCommandBuffer(gfx::GpuPreference gpu_preference);
void DidDestroyCommandBuffer(gfx::GpuPreference gpu_preference);
// The lifetime of objects of this class is managed by a GpuChannelManager.
// The GpuChannelManager destroy all the GpuChannels that they own when they
// are destroyed. So a raw pointer is safe.
GpuChannelManager* gpu_channel_manager_;
scoped_ptr<IPC::SyncChannel> channel_;
std::deque<IPC::Message*> deferred_messages_;
// The id of the client who is on the other side of the channel.
int client_id_;
// Uniquely identifies the channel within this GPU process.
std::string channel_id_;
// Handle to the renderer process that is on the other side of the channel.
base::ProcessHandle renderer_process_;
// The process id of the renderer process.
base::ProcessId renderer_pid_;
// Used to implement message routing functionality to CommandBuffer objects
MessageRouter router_;
// The share group that all contexts associated with a particular renderer
// process use.
scoped_refptr<gfx::GLShareGroup> share_group_;
#if defined(ENABLE_GPU)
typedef IDMap<GpuCommandBufferStub, IDMapOwnPointer> StubMap;
StubMap stubs_;
#endif // defined (ENABLE_GPU)
bool log_messages_; // True if we should log sent and received messages.
gpu::gles2::DisallowedFeatures disallowed_features_;
GpuWatchdog* watchdog_;
bool software_;
bool handle_messages_scheduled_;
bool processed_get_state_fast_;
int32 num_contexts_preferring_discrete_gpu_;
base::WeakPtrFactory<GpuChannel> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(GpuChannel);
};
#endif // CONTENT_COMMON_GPU_GPU_CHANNEL_H_
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