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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 CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_MANAGER_H_ |
| 6 #define CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_MANAGER_H_ |
| 7 |
| 8 #include "base/memory/weak_ptr.h" |
| 9 #include "cc/surfaces/surface_id.h" |
| 10 #include "cc/surfaces/surface_observer.h" |
| 11 #include "content/browser/renderer_host/offscreen_canvas_surface_impl.h" |
| 12 |
| 13 namespace content { |
| 14 |
| 15 class CONTENT_EXPORT OffscreenCanvasSurfaceManager |
| 16 : public cc::SurfaceObserver { |
| 17 public: |
| 18 OffscreenCanvasSurfaceManager(); |
| 19 virtual ~OffscreenCanvasSurfaceManager(); |
| 20 |
| 21 static OffscreenCanvasSurfaceManager* GetInstance(); |
| 22 |
| 23 void RegisterOffscreenCanvasSurfaceInstance(cc::FrameSinkId, |
| 24 OffscreenCanvasSurfaceImpl*); |
| 25 void UnregisterOffscreenCanvasSurfaceInstance(cc::FrameSinkId); |
| 26 OffscreenCanvasSurfaceImpl* GetSurfaceInstance(cc::FrameSinkId); |
| 27 |
| 28 private: |
| 29 friend class OffscreenCanvasSurfaceManagerTest; |
| 30 |
| 31 // cc::SurfaceObserver implementation. |
| 32 // TODO(crbug.com/662498): Implement these functions when |
| 33 // OffscreenCanvasSurfaceManager must propagate the resizing information |
| 34 // back to renderer/main. |
| 35 void OnSurfaceCreated(const cc::SurfaceId& surface_id, |
| 36 const gfx::Size& frame_size, |
| 37 float device_scale_factor) override {} |
| 38 void OnSurfaceDamaged(const cc::SurfaceId&, bool* changed) override {} |
| 39 |
| 40 // When an OffscreenCanvasSurfaceImpl instance is destructed, it will |
| 41 // unregister the corresponding entry from this map. |
| 42 std::unordered_map<cc::FrameSinkId, |
| 43 OffscreenCanvasSurfaceImpl*, |
| 44 cc::FrameSinkIdHash> |
| 45 registered_surface_instances_; |
| 46 DISALLOW_COPY_AND_ASSIGN(OffscreenCanvasSurfaceManager); |
| 47 }; |
| 48 |
| 49 } // namespace content |
| 50 |
| 51 #endif // CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_MANAGER_H_ |
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