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32 #ifndef Canvas2DLayerChromium_h
33 #define Canvas2DLayerChromium_h
35 #if USE(ACCELERATED_COMPOSITING)
37 #include "CanvasLayerChromium.h"
38 #include "ImageBuffer.h"
39 #include "ManagedTexture.h"
45 class GraphicsContext3D;
48 // A layer containing an accelerated 2d canvas
49 class Canvas2DLayerChromium : public CanvasLayerChromium {
51 enum WillDrawCondition {
52 WillDrawUnconditionally,
53 WillDrawIfLayerNotDeferred,
56 static PassRefPtr<Canvas2DLayerChromium> create(PassRefPtr<GraphicsContext3D>, const IntSize&, DeferralMode);
57 virtual ~Canvas2DLayerChromium();
59 void setTextureId(unsigned);
61 virtual void setNeedsDisplayRect(const FloatRect&) OVERRIDE;
63 virtual bool drawsContent() const OVERRIDE;
64 virtual void update(CCTextureUpdater&, const CCOcclusionTracker*) OVERRIDE;
65 virtual void pushPropertiesTo(CCLayerImpl*) OVERRIDE;
67 void setCanvas(SkCanvas*);
68 void layerWillDraw(WillDrawCondition) const;
71 Canvas2DLayerChromium(PassRefPtr<GraphicsContext3D>, const IntSize&, DeferralMode);
72 bool drawingIntoImplThreadTexture() const;
74 RefPtr<GraphicsContext3D> m_context;
77 unsigned m_backTextureId;
78 // When m_useDoubleBuffering is true, the compositor will draw using a copy of the
79 // canvas' backing texture. This option should be used with the compositor doesn't
80 // synchronize its draws with the canvas updates.
81 bool m_useDoubleBuffering;
82 OwnPtr<ManagedTexture> m_frontTexture;
84 bool m_useRateLimiter;
85 DeferralMode m_deferralMode;
89 #endif // USE(ACCELERATED_COMPOSITING)