Impl mus::mojom::GpuService to enable using Chrome IPC version gpu CmdBuf in mus

components/mus/gpu/gpu_service_mus.h

 // Copyright 2016 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 COMPONENTS_MUS_GPU_GPU_SERVICE_MUS_H_
 #define COMPONENTS_MUS_GPU_GPU_SERVICE_MUS_H_
 
-#include "components/mus/public/interfaces/gpu_memory_buffer.mojom.h"
-#include "components/mus/public/interfaces/gpu_service.mojom.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/threading/thread.h"
+#include "build/build_config.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
+#include "gpu/config/gpu_info.h"
+#include "gpu/ipc/client/gpu_channel_host.h"
 #include "gpu/ipc/common/surface_handle.h"
+#include "gpu/ipc/service/gpu_channel.h"
+#include "gpu/ipc/service/gpu_channel_manager.h"
 #include "gpu/ipc/service/gpu_channel_manager_delegate.h"
+#include "gpu/ipc/service/gpu_config.h"
+#include "gpu/ipc/service/x_util.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}
+
+namespace IPC {
+struct ChannelHandle;
+}
+
+namespace gpu {
+class GpuChannelHost;
+class GpuMemoryBufferFactory;
+class SyncPointManager;
+}
+
+namespace media {
+class MediaService;
+}
 
 namespace mus {
 
+class GpuMemoryBufferManagerMusLocal;
+
 // TODO(fsamuel): GpuServiceMus is intended to be the Gpu thread within Mus.
 // Similar to GpuChildThread, it is a GpuChannelManagerDelegate and will have a
 // GpuChannelManager.
-class GpuServiceMus : public mojom::GpuService,
-                      public gpu::GpuChannelManagerDelegate {
+class GpuServiceMus : public gpu::GpuChannelManagerDelegate,
+                      public gpu::GpuChannelHostFactory {
  public:
-  GpuServiceMus();
-  ~GpuServiceMus() override;
+  IPC::ChannelHandle EstablishGpuChannel(int client_id,
+                                         uint64_t client_tracing_id,
+                                         bool preempts,
+                                         bool allow_view_command_buffers,
+                                         bool allow_real_time_streams);
+  gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
+                                                   const gfx::Size& size,
+                                                   gfx::BufferFormat format,
+                                                   gfx::BufferUsage usage,
+                                                   int client_id,
+                                                   int32_t surface_handle);
+  gfx::GpuMemoryBufferHandle CreateGpuMemoryBufferFromeHandle(
+      gfx::GpuMemoryBufferHandle buffer_handle,
+      gfx::GpuMemoryBufferId id,
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      int client_id);
+  void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
+                              int client_id,
+                              const gpu::SyncToken& sync_token);
 
-  // mojom::GpuService overrides:
-  void EstablishGpuChannel(
-      bool prempts,
-      bool allow_view_command_buffers,
-      bool allow_real_time_streams,
-      const mojom::GpuService::EstablishGpuChannelCallback& callback) override;
+  scoped_refptr<gpu::GpuChannelHost> gpu_channel_local() const {
+    return gpu_channel_local_;
+  }
 
-  void CreateGpuMemoryBuffer(
-      mojom::GpuMemoryBufferIdPtr id,
-      mojo::SizePtr size,
-      mojom::BufferFormat format,
-      mojom::BufferUsage usage,
-      uint64_t surface_id,
-      const mojom::GpuService::CreateGpuMemoryBufferCallback& callback)
-      override;
-
-  void CreateGpuMemoryBufferFromHandle(
-      mojom::GpuMemoryBufferHandlePtr buffer_handle,
-      mojom::GpuMemoryBufferIdPtr id,
-      mojo::SizePtr size,
-      mojom::BufferFormat format,
-      const mojom::GpuService::CreateGpuMemoryBufferFromHandleCallback&
-          callback) override;
-
-  void DestroyGpuMemoryBuffer(mojom::GpuMemoryBufferIdPtr id,
-                              const gpu::SyncToken& sync_token) override;
+  const gpu::GPUInfo& gpu_info() const { return gpu_info_; }
 
   // GpuChannelManagerDelegate overrides:
   void DidCreateOffscreenContext(const GURL& active_url) override;
   void DidDestroyChannel(int client_id) override;
   void DidDestroyOffscreenContext(const GURL& active_url) override;
   void DidLoseContext(bool offscreen,
                       gpu::error::ContextLostReason reason,
                       const GURL& active_url) override;
   void GpuMemoryUmaStats(const gpu::GPUMemoryUmaStats& params) override;
-  void StoreShaderToDisk(int32_t client_id,
+  void StoreShaderToDisk(int client_id,
                          const std::string& key,
                          const std::string& shader) override;
 #if defined(OS_WIN)
   void SendAcceleratedSurfaceCreatedChildWindow(
       gpu::SurfaceHandle parent_window,
       gpu::SurfaceHandle child_window) override;
 #endif
   void SetActiveURL(const GURL& url) override;
 
+  // GpuChannelHostFactory overrides:
+  bool IsMainThread() override;
+  scoped_refptr<base::SingleThreadTaskRunner> GetIOThreadTaskRunner() override;
+  std::unique_ptr<base::SharedMemory> AllocateSharedMemory(
+      size_t size) override;
+
+  static GpuServiceMus* GetInstance();
+
  private:
+  friend struct base::DefaultSingletonTraits<GpuServiceMus>;
+
+  GpuServiceMus();
+  ~GpuServiceMus() override;
+
+  void Initialize();
+  void InitializeOnGpuThread(IPC::ChannelHandle* channel_handle,
+                             base::WaitableEvent* event);
+  void EstablishGpuChannelOnGpuThread(int client_id,
+                                      uint64_t client_tracing_id,
+                                      bool preempts,
+                                      bool allow_view_command_buffers,
+                                      bool allow_real_time_streams,
+                                      IPC::ChannelHandle* channel_handle,
+                                      base::WaitableEvent* event);
+
+  // The main thread message loop.
+  base::MessageLoop* main_message_loop_;
+
+  // An event that will be signalled when we shutdown.
+  base::WaitableEvent shutdown_event_;
+
+  // The main thread for GpuService.
+  base::Thread gpu_thread_;
+
+  // The thread that handles IO events for GpuService.
+  base::Thread io_thread_;
+
+  // The thread that handles IO events for GpuChannelHost local.

[piman, 2016/05/24 22:46:54]

Does this have to be different from io_thread_?
I think when we run with --in-process-gpu in Chrome they are the same.

[Peng, 2016/05/25 19:42:55]

Done.

+  base::Thread io_thread_local_;
+
+  std::unique_ptr<gpu::SyncPointManager> owned_sync_point_manager_;
+
+  std::unique_ptr<gpu::GpuChannelManager> gpu_channel_manager_;
+
+  std::unique_ptr<media::MediaService> media_service_;
+
+  std::unique_ptr<gpu::GpuMemoryBufferFactory> gpu_memory_buffer_factory_;
+
+  // A GPU memory buffer manager used locally.
+  std::unique_ptr<GpuMemoryBufferManagerMusLocal>
+      gpu_memory_buffer_manager_mus_local_;
+
+  // A GPU channel used locally.
+  scoped_refptr<gpu::GpuChannelHost> gpu_channel_local_;
+
+  gpu::GpuPreferences gpu_preferences_;
+
+  // Information about the GPU, such as device and vendor ID.
+  gpu::GPUInfo gpu_info_;
+
   DISALLOW_COPY_AND_ASSIGN(GpuServiceMus);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_GPU_GPU_SERVICE_MUS_H_