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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_COMMON_GPU_GPU_CHANNEL_H_
#define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
#pragma once
#include <set>
#include <string>
#include <vector>
#include "base/id_map.h"
#include "base/memory/scoped_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_surface_stub.h"
#include "content/common/message_router.h"
#include "ipc/ipc_sync_channel.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/size.h"
class GpuChannelManager;
struct GPUCreateCommandBufferConfig;
class GpuWatchdog;
class TransportTexture;
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,
int renderer_id);
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 GetRendererFileDescriptor();
#endif // defined(OS_POSIX)
base::ProcessHandle renderer_process() const {
return renderer_process_;
}
// IPC::Channel::Listener implementation:
virtual bool OnMessageReceived(const IPC::Message& msg);
virtual void OnChannelError();
virtual void OnChannelConnected(int32 peer_pid);
// IPC::Message::Sender implementation:
virtual bool Send(IPC::Message* msg);
void CreateViewCommandBuffer(
gfx::PluginWindowHandle window,
int32 render_view_id,
const GPUCreateCommandBufferConfig& init_params,
int32* route_id);
void ViewResized(int32 command_buffer_route_id);
#if defined(OS_MACOSX)
virtual void AcceleratedSurfaceBuffersSwapped(
int32 route_id, uint64 swap_buffers_count);
void DestroyCommandBufferByViewId(int32 render_view_id);
#endif
void LoseAllContexts();
// Get the TransportTexture by ID.
TransportTexture* GetTransportTexture(int32 route_id);
// Destroy the TransportTexture by ID. This method is only called by
// TransportTexture to delete and detach itself.
void DestroyTransportTexture(int32 route_id);
// A callback which is called after a Set/WaitLatch command is processed.
// The bool parameter will be true for SetLatch, and false for a WaitLatch
// that is blocked. An unblocked WaitLatch will not trigger a callback.
void OnLatchCallback(int route_id, bool is_set_latch);
private:
bool OnControlMessageReceived(const IPC::Message& msg);
int GenerateRouteID();
// Message handlers.
void OnInitialize(base::ProcessHandle renderer_process);
void OnCreateOffscreenCommandBuffer(
int32 parent_route_id,
const gfx::Size& size,
const GPUCreateCommandBufferConfig& init_params,
uint32 parent_texture_id,
int32* route_id);
void OnDestroyCommandBuffer(int32 route_id);
void OnCreateOffscreenSurface(const gfx::Size& size,
int* route_id);
void OnDestroySurface(int route_id);
void OnCreateVideoDecoder(int32 decoder_host_id,
const std::vector<uint32>& configs);
void OnDestroyVideoDecoder(int32 decoder_id);
void OnCreateTransportTexture(int32 context_route_id, int32 host_id);
// 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_;
// The id of the renderer who is on the other side of the channel.
int renderer_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_;
#if defined(ENABLE_GPU)
typedef IDMap<GpuCommandBufferStub, IDMapOwnPointer> StubMap;
StubMap stubs_;
typedef IDMap<GpuSurfaceStub, IDMapOwnPointer> SurfaceMap;
SurfaceMap surfaces_;
std::set<int32> latched_routes_;
#endif // defined (ENABLE_GPU)
// A collection of transport textures created.
typedef IDMap<TransportTexture, IDMapOwnPointer> TransportTextureMap;
TransportTextureMap transport_textures_;
bool log_messages_; // True if we should log sent and received messages.
gpu::gles2::DisallowedExtensions disallowed_extensions_;
GpuWatchdog* watchdog_;
DISALLOW_COPY_AND_ASSIGN(GpuChannel);
};
#endif // CONTENT_COMMON_GPU_GPU_CHANNEL_H_
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