Compositing Layer update for OffscreenCanvas resize

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 "mojo/public/cpp/bindings/binding.h"
 #include "platform/graphics/OffscreenCanvasFrameDispatcher.h"
 #include "platform/graphics/StaticBitmapImage.h"
 #include <memory>
 
 namespace blink {
 
 class PLATFORM_EXPORT OffscreenCanvasFrameDispatcherImpl final
     : public OffscreenCanvasFrameDispatcher,
       WTF_NON_EXPORTED_BASE(
           public cc::mojom::blink::MojoCompositorFrameSinkClient) {
  public:
   OffscreenCanvasFrameDispatcherImpl(uint32_t clientId,
                                      uint32_t sinkId,
                                      uint32_t localId,
                                      uint64_t nonceHigh,
                                      uint64_t nonceLow,
                                      int canvasId,
-                                     int width,
-                                     int height);
+                                     unsigned width,
+                                     unsigned height);
 
   // OffscreenCanvasFrameDispatcher implementation.
   ~OffscreenCanvasFrameDispatcherImpl() override {}
   void dispatchFrame(RefPtr<StaticBitmapImage>,
                      double commitStartTime,
                      bool isWebGLSoftwareRendering = false) override;
   void reclaimResource(unsigned resourceId) override;
 
   // cc::mojom::blink::MojoCompositorFrameSinkClient implementation.
   void DidReceiveCompositorFrameAck() override;
   void OnBeginFrame(const cc::BeginFrameArgs&) override;
   void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
 
   // 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(unsigned width, unsigned height) override;
+
  private:
-  const cc::SurfaceId m_surfaceId;
-  const int m_width;
-  const int m_height;
+  const cc::FrameSinkId m_frameSinkId;
+  int m_width;
+  int m_height;
 
   unsigned m_nextResourceId;
   HashMap<unsigned, RefPtr<StaticBitmapImage>> m_cachedImages;
   HashMap<unsigned, std::unique_ptr<cc::SharedBitmap>> m_sharedBitmaps;
   HashMap<unsigned, GLuint> m_cachedTextureIds;
   HashSet<unsigned> m_spareResourceLocks;
 
   bool verifyImageSize(const IntSize);
 
   cc::mojom::blink::MojoCompositorFrameSinkPtr m_sink;
   mojo::Binding<cc::mojom::blink::MojoCompositorFrameSinkClient> m_binding;
 
   int m_placeholderCanvasId;
 
   void setTransferableResourceToSharedBitmap(cc::TransferableResource&,
                                              RefPtr<StaticBitmapImage>);
   void setTransferableResourceToSharedGPUContext(cc::TransferableResource&,
                                                  RefPtr<StaticBitmapImage>);
   void setTransferableResourceToStaticBitmapImage(cc::TransferableResource&,
                                                   RefPtr<StaticBitmapImage>);
 };
 
 }  // namespace blink
 
 #endif  // OffscreenCanvasFrameDispatcherImpl_h