1 /* 2 * Copyright 2012, The Android Open Source Project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef CanvasLayer_h 27 #define CanvasLayer_h 28 29 #if USE(ACCELERATED_COMPOSITING) 30 31 #include "HTMLCanvasElement.h" 32 #include "ImageData.h" 33 #include "LayerAndroid.h" 34 #include "RenderLayer.h" 35 36 #include <wtf/RefPtr.h> 37 38 namespace WebCore { 39 40 class CanvasTexture; 41 42 class CanvasLayer : public LayerAndroid, private CanvasObserver { 43 public: 44 CanvasLayer(RenderLayer* owner, HTMLCanvasElement* canvas); 45 CanvasLayer(const CanvasLayer& layer); 46 virtual ~CanvasLayer(); 47 48 virtual LayerAndroid* copy() const { return new CanvasLayer(*this); } 49 virtual SubclassType subclassType() const { return LayerAndroid::CanvasLayer; } 50 virtual void clearDirtyRegion(); 51 52 virtual bool drawGL(bool layerTilesDisabled); 53 virtual void contentDraw(SkCanvas* canvas, PaintStyle style); 54 virtual bool needsTexture(); 55 virtual bool needsIsolatedSurface() { return true; } 56 57 protected: 58 virtual InvalidateFlags onSetHwAccelerated(bool hwAccelerated); 59 60 private: 61 virtual void canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect); 62 virtual void canvasResized(HTMLCanvasElement*); 63 virtual void canvasDestroyed(HTMLCanvasElement*); 64 65 void init(); 66 SkBitmapRef* bitmap() const; 67 IntRect visibleContentRect() const; 68 IntSize offsetFromRenderer() const; 69 70 HTMLCanvasElement* m_canvas; 71 IntRect m_visibleContentRect; 72 IntSize m_offsetFromRenderer; 73 SkRegion m_dirtyCanvas; 74 SkBitmapRef* m_bitmap; 75 RefPtr<CanvasTexture> m_texture; 76 }; 77 78 } // namespace WebCore 79 80 #endif // USE(ACCELERATED_COMPOSITING) 81 82 #endif // CanvasLayer_h 83
