Move DisplayCompositor code to new component.

services/ui/surfaces/display_compositor.h

-// Copyright 2015 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 SERVICES_UI_SURFACES_DISPLAY_COMPOSITOR_H_
-#define SERVICES_UI_SURFACES_DISPLAY_COMPOSITOR_H_
-
-#include <stdint.h>
-
-#include <memory>
-#include <unordered_map>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/threading/thread_checker.h"
-#include "cc/ipc/display_compositor.mojom.h"
-#include "cc/surfaces/frame_sink_id.h"
-#include "cc/surfaces/local_surface_id.h"
-#include "cc/surfaces/surface_id.h"
-#include "cc/surfaces/surface_manager.h"
-#include "cc/surfaces/surface_observer.h"
-#include "components/display_compositor/gpu_compositor_frame_sink_delegate.h"
-#include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
-#include "gpu/ipc/common/surface_handle.h"
-#include "gpu/ipc/in_process_command_buffer.h"
-#include "ipc/ipc_channel_handle.h"
-#include "mojo/public/cpp/bindings/binding.h"
-
-namespace gpu {
-class GpuMemoryBufferManager;
-class ImageFactory;
-}
-
-namespace cc {
-class Display;
-class SyntheticBeginFrameSource;
-}
-
-namespace display_compositor {
-class GpuCompositorFrameSink;
-}
-
-namespace ui {
-
-// The DisplayCompositor object is an object global to the Window Server app
-// that holds the SurfaceServer and allocates new Surfaces namespaces.
-// This object lives on the main thread of the Window Server.
-// TODO(rjkroege, fsamuel): This object will need to change to support multiple
-// displays.
-class DisplayCompositor
-    : public cc::SurfaceObserver,
-      public display_compositor::GpuCompositorFrameSinkDelegate,
-      public cc::mojom::DisplayCompositor {
- public:
-  DisplayCompositor(
-      scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_service,
-      std::unique_ptr<gpu::GpuMemoryBufferManager> gpu_memory_buffer_manager,
-      gpu::ImageFactory* image_factory,
-      cc::mojom::DisplayCompositorRequest request,
-      cc::mojom::DisplayCompositorClientPtr client);
-  ~DisplayCompositor() override;
-
-  cc::SurfaceManager* manager() { return &manager_; }
-
-  // cc::mojom::DisplayCompositor implementation:
-  void CreateRootCompositorFrameSink(
-      const cc::FrameSinkId& frame_sink_id,
-      gpu::SurfaceHandle surface_handle,
-      cc::mojom::MojoCompositorFrameSinkAssociatedRequest request,
-      cc::mojom::MojoCompositorFrameSinkPrivateRequest private_request,
-      cc::mojom::MojoCompositorFrameSinkClientPtr client,
-      cc::mojom::DisplayPrivateAssociatedRequest display_private_request)
-      override;
-  void CreateCompositorFrameSink(
-      const cc::FrameSinkId& frame_sink_id,
-      cc::mojom::MojoCompositorFrameSinkRequest request,
-      cc::mojom::MojoCompositorFrameSinkPrivateRequest private_request,
-      cc::mojom::MojoCompositorFrameSinkClientPtr client) override;
-  void RegisterFrameSinkHierarchy(
-      const cc::FrameSinkId& parent_frame_sink_id,
-      const cc::FrameSinkId& child_frame_sink_id) override;
-  void UnregisterFrameSinkHierarchy(
-      const cc::FrameSinkId& parent_frame_sink_id,
-      const cc::FrameSinkId& child_frame_sink_id) override;
-  void DropTemporaryReference(const cc::SurfaceId& surface_id) override;
-
- private:
-  std::unique_ptr<cc::Display> CreateDisplay(
-      const cc::FrameSinkId& frame_sink_id,
-      gpu::SurfaceHandle surface_handle,
-      cc::SyntheticBeginFrameSource* begin_frame_source);
-
-  // It is necessary to pass |frame_sink_id| by value because the id
-  // is owned by the GpuCompositorFrameSink in the map. When the sink is
-  // removed from the map, |frame_sink_id| would also be destroyed if it were a
-  // reference. But the map can continue to iterate and try to use it. Passing
-  // by value avoids this.
-  void DestroyCompositorFrameSink(cc::FrameSinkId frame_sink_id);
-
-  // cc::SurfaceObserver implementation.
-  void OnSurfaceCreated(const cc::SurfaceInfo& surface_info) override;
-  void OnSurfaceDamaged(const cc::SurfaceId& surface_id,
-                        bool* changed) override;
-
-  // display_compositor::GpuCompositorFrameSinkDelegate implementation.
-  void OnClientConnectionLost(const cc::FrameSinkId& frame_sink_id,
-                              bool destroy_compositor_frame_sink) override;
-  void OnPrivateConnectionLost(const cc::FrameSinkId& frame_sink_id,
-                               bool destroy_compositor_frame_sink) override;
-
-  // SurfaceManager should be the first object constructed and the last object
-  // destroyed in order to ensure that all other objects that depend on it have
-  // access to a valid pointer for the entirety of their liftimes.
-  cc::SurfaceManager manager_;
-
-  scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_service_;
-  std::unique_ptr<gpu::GpuMemoryBufferManager> gpu_memory_buffer_manager_;
-  gpu::ImageFactory* image_factory_;
-
-  std::unordered_map<cc::FrameSinkId,
-                     std::unique_ptr<cc::mojom::MojoCompositorFrameSink>,
-                     cc::FrameSinkIdHash>
-      compositor_frame_sinks_;
-
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-
-  base::ThreadChecker thread_checker_;
-
-  cc::mojom::DisplayCompositorClientPtr client_;
-  mojo::Binding<cc::mojom::DisplayCompositor> binding_;
-
-  DISALLOW_COPY_AND_ASSIGN(DisplayCompositor);
-};
-
-}  // namespace ui
-
-#endif  //  SERVICES_UI_SURFACES_DISPLAY_COMPOSITOR_H_