Implementing promise-based commit for driving OffscreenCanvas animations

third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.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 OffscreenCanvasFrameDispatcherImpl_h
 #define OffscreenCanvasFrameDispatcherImpl_h
 
 #include "cc/ipc/mojo_compositor_frame_sink.mojom-blink.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/resources/shared_bitmap.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "platform/graphics/OffscreenCanvasFrameDispatcher.h"
 #include "platform/graphics/StaticBitmapImage.h"
 #include "wtf/Compiler.h"
 #include <memory>
 
 namespace blink {
 
 class PLATFORM_EXPORT OffscreenCanvasFrameDispatcherImpl final
     : public OffscreenCanvasFrameDispatcher,
       NON_EXPORTED_BASE(
           public cc::mojom::blink::MojoCompositorFrameSinkClient) {
  public:
-  OffscreenCanvasFrameDispatcherImpl(uint32_t clientId,
+  OffscreenCanvasFrameDispatcherImpl(OffscreenCanvasFrameDispatcherClient*,
+                                     uint32_t clientId,
                                      uint32_t sinkId,
                                      int canvasId,
                                      int width,
                                      int height);
 
   // OffscreenCanvasFrameDispatcher implementation.
-  ~OffscreenCanvasFrameDispatcherImpl() override {}
+  ~OffscreenCanvasFrameDispatcherImpl() final;
   void dispatchFrame(RefPtr<StaticBitmapImage>,
                      double commitStartTime,
-                     bool isWebGLSoftwareRendering = false) override;
-  void reclaimResource(unsigned resourceId) override;
+                     bool isWebGLSoftwareRendering = false) final;
+  void reclaimResource(unsigned resourceId) final;
+  void reshape(int width, int height) final;
 
   // cc::mojom::blink::MojoCompositorFrameSinkClient implementation.
-  void DidReceiveCompositorFrameAck() override;
-  void OnBeginFrame(const cc::BeginFrameArgs&) override;
-  void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
-  void WillDrawSurface() override;
+  void DidReceiveCompositorFrameAck() final;
+  void OnBeginFrame(const cc::BeginFrameArgs&) final;
+  void ReclaimResources(const cc::ReturnedResourceArray& resources) final;
+  void WillDrawSurface() final;
 
   // This enum is used in histogram, so it should be append-only.
   enum OffscreenCanvasCommitType {
     CommitGPUCanvasGPUCompositing = 0,
     CommitGPUCanvasSoftwareCompositing = 1,
     CommitSoftwareCanvasGPUCompositing = 2,
     CommitSoftwareCanvasSoftwareCompositing = 3,
     OffscreenCanvasCommitTypeCount,
   };
 
-  void reshape(int width, int height) override;
-
  private:
   // Surface-related
   cc::SurfaceIdAllocator m_surfaceIdAllocator;
+  void scheduleSyntheticBeginFrame();  // To be removed (crbug.com/674744)
+
+  TaskHandle m_syntheticBeginFrameTask;  // To be removed (crbug.com/674744)
   const cc::FrameSinkId m_frameSinkId;
   cc::LocalFrameId m_currentLocalFrameId;
 
   int m_width;
   int m_height;
   bool m_changeSizeForNextCommit;
 
   unsigned m_nextResourceId;
   HashMap<unsigned, RefPtr<StaticBitmapImage>> m_cachedImages;
   HashMap<unsigned, std::unique_ptr<cc::SharedBitmap>> m_sharedBitmaps;
@@ skipping 11 matching lines @@
                                              RefPtr<StaticBitmapImage>);
   void setTransferableResourceToSharedGPUContext(cc::TransferableResource&,
                                                  RefPtr<StaticBitmapImage>);
   void setTransferableResourceToStaticBitmapImage(cc::TransferableResource&,
                                                   RefPtr<StaticBitmapImage>);
 };
 
 }  // namespace blink
 
 #endif  // OffscreenCanvasFrameDispatcherImpl_h