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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef COMPONENTS_EXO_COMPOSITOR_FRAME_SINK_HOLDER_H_ |
| 6 #define COMPONENTS_EXO_COMPOSITOR_FRAME_SINK_HOLDER_H_ |
| 7 |
| 8 #include <list> |
| 9 #include <map> |
| 10 #include <memory> |
| 11 |
| 12 #include "cc/ipc/mojo_compositor_frame_sink.mojom.h" |
| 13 #include "cc/resources/single_release_callback.h" |
| 14 #include "cc/resources/transferable_resource.h" |
| 15 #include "cc/scheduler/begin_frame_source.h" |
| 16 #include "components/exo/compositor_frame_sink.h" |
| 17 #include "components/exo/surface_observer.h" |
| 18 #include "mojo/public/cpp/bindings/binding.h" |
| 19 |
| 20 namespace exo { |
| 21 class Surface; |
| 22 |
| 23 // This class talks to MojoCompositorFrameSink and keeps track of references to |
| 24 // the contents of Buffers. It's keeped alive by references from |
| 25 // release_callbacks_. It's destroyed when its owning Surface is destroyed and |
| 26 // the last outstanding release callback is called. |
| 27 class CompositorFrameSinkHolder |
| 28 : public base::RefCounted<CompositorFrameSinkHolder>, |
| 29 public cc::ExternalBeginFrameSourceClient, |
| 30 public cc::mojom::MojoCompositorFrameSinkClient, |
| 31 public cc::BeginFrameObserver, |
| 32 public SurfaceObserver { |
| 33 public: |
| 34 CompositorFrameSinkHolder( |
| 35 Surface* surface, |
| 36 std::unique_ptr<CompositorFrameSink> frame_sink, |
| 37 cc::mojom::MojoCompositorFrameSinkClientRequest request); |
| 38 |
| 39 bool HasReleaseCallbackForResource(cc::ResourceId id); |
| 40 void AddResourceReleaseCallback( |
| 41 cc::ResourceId id, |
| 42 std::unique_ptr<cc::SingleReleaseCallback> callback); |
| 43 |
| 44 CompositorFrameSink* GetCompositorFrameSink() { return frame_sink_.get(); } |
| 45 |
| 46 base::WeakPtr<CompositorFrameSinkHolder> GetWeakPtr() { |
| 47 return weak_factory_.GetWeakPtr(); |
| 48 } |
| 49 |
| 50 using FrameCallback = base::Callback<void(base::TimeTicks frame_time)>; |
| 51 void ActivateFrameCallbacks(std::list<FrameCallback>* frame_callbacks); |
| 52 void CancelFrameCallbacks(); |
| 53 |
| 54 void SetNeedsBeginFrame(bool needs_begin_frame); |
| 55 |
| 56 void Satisfy(const cc::SurfaceSequence& sequence); |
| 57 void Require(const cc::SurfaceId& id, const cc::SurfaceSequence& sequence); |
| 58 |
| 59 // Overridden from cc::mojom::MojoCompositorFrameSinkClient: |
| 60 void DidReceiveCompositorFrameAck() override; |
| 61 void OnBeginFrame(const cc::BeginFrameArgs& args) override; |
| 62 void ReclaimResources(const cc::ReturnedResourceArray& resources) override; |
| 63 void WillDrawSurface() override; |
| 64 |
| 65 // Overridden from cc::BeginFrameObserver: |
| 66 const cc::BeginFrameArgs& LastUsedBeginFrameArgs() const override; |
| 67 void OnBeginFrameSourcePausedChanged(bool paused) override; |
| 68 |
| 69 // Overridden from cc::ExternalBeginFrameSouceClient: |
| 70 void OnNeedsBeginFrames(bool needs_begin_frames) override; |
| 71 |
| 72 // Overridden from SurfaceObserver: |
| 73 void OnSurfaceDestroying(Surface* surface) override; |
| 74 |
| 75 private: |
| 76 friend class base::RefCounted<CompositorFrameSinkHolder>; |
| 77 |
| 78 ~CompositorFrameSinkHolder() override; |
| 79 |
| 80 void UpdateNeedsBeginFrame(); |
| 81 |
| 82 // Each release callback holds a reference to the CompositorFrameSinkHolder |
| 83 // itself to keep it alive. Running and erasing the callbacks might result in |
| 84 // the instance being destroyed. Therefore, we should not access any member |
| 85 // variables after running and erasing the callbacks. |
| 86 using ResourceReleaseCallbackMap = |
| 87 std::map<int, |
| 88 std::pair<scoped_refptr<CompositorFrameSinkHolder>, |
| 89 std::unique_ptr<cc::SingleReleaseCallback>>>; |
| 90 ResourceReleaseCallbackMap release_callbacks_; |
| 91 |
| 92 Surface* surface_; |
| 93 std::unique_ptr<CompositorFrameSink> frame_sink_; |
| 94 |
| 95 std::list<FrameCallback> active_frame_callbacks_; |
| 96 std::unique_ptr<cc::ExternalBeginFrameSource> begin_frame_source_; |
| 97 bool needs_begin_frame_ = false; |
| 98 cc::BeginFrameArgs last_begin_frame_args_; |
| 99 mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient> binding_; |
| 100 |
| 101 base::WeakPtrFactory<CompositorFrameSinkHolder> weak_factory_; |
| 102 |
| 103 DISALLOW_COPY_AND_ASSIGN(CompositorFrameSinkHolder); |
| 104 }; |
| 105 |
| 106 } // namespace exo |
| 107 |
| 108 #endif // COMPONENTS_EXO_COMPOSITOR_FRAME_SINK_HOLDER_H_ |
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