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 PicturePile_h 27 #define PicturePile_h 28 29 #include "IntRect.h" 30 #include "IntSize.h" 31 #include "PrerenderedInval.h" 32 #include "SkBitmap.h" 33 #include "SkRegion.h" 34 #include "SkRefCnt.h" 35 36 #include <wtf/PassRefPtr.h> 37 #include <wtf/RefCounted.h> 38 #include <wtf/ThreadSafeRefCounted.h> 39 #include <wtf/Vector.h> 40 41 class SkPicture; 42 class SkCanvas; 43 44 namespace WebCore { 45 46 class GraphicsContext; 47 48 class PicturePainter { 49 public: 50 virtual void paintContents(GraphicsContext* gc, IntRect& dirty) = 0; createPrerenderCanvas(PrerenderedInval * prerendered)51 virtual SkCanvas* createPrerenderCanvas(PrerenderedInval* prerendered) 52 { 53 return 0; 54 } ~PicturePainter()55 virtual ~PicturePainter() {} 56 }; 57 58 class PictureContainer { 59 public: 60 SkPicture* picture; 61 IntRect area; 62 bool dirty; 63 RefPtr<PrerenderedInval> prerendered; 64 PictureContainer(const IntRect & area)65 PictureContainer(const IntRect& area) 66 : picture(0) 67 , area(area) 68 , dirty(true) 69 {} 70 PictureContainer(const PictureContainer & other)71 PictureContainer(const PictureContainer& other) 72 : picture(other.picture) 73 , area(other.area) 74 , dirty(other.dirty) 75 , prerendered(other.prerendered) 76 { 77 SkSafeRef(picture); 78 } 79 ~PictureContainer()80 ~PictureContainer() 81 { 82 SkSafeUnref(picture); 83 } 84 }; 85 86 class PicturePile { 87 public: PicturePile()88 PicturePile() {} 89 PicturePile(const PicturePile& other); 90 PicturePile(SkPicture* picture); 91 size()92 const IntSize& size() { return m_size; } 93 94 void clearPrerenders(); 95 96 // used by PicturePileLayerContents 97 void draw(SkCanvas* canvas); 98 99 // Used by WebViewCore 100 void invalidate(const IntRect& dirtyRect); 101 void setSize(const IntSize& size); 102 void updatePicturesIfNeeded(PicturePainter* painter); 103 void reset(); dirtyRegion()104 SkRegion& dirtyRegion() { return m_dirtyRegion; } 105 PrerenderedInval* prerenderedInvalForArea(const IntRect& area); 106 107 private: 108 void applyWebkitInvals(); 109 void updatePicture(PicturePainter* painter, PictureContainer& container); 110 void appendToPile(const IntRect& inval, const IntRect& originalInval = IntRect()); 111 void drawWithClipRecursive(SkCanvas* canvas, SkRegion& clipRegion, int index); 112 113 IntSize m_size; 114 Vector<PictureContainer> m_pile; 115 Vector<IntRect> m_webkitInvals; 116 SkRegion m_dirtyRegion; 117 }; 118 119 } // namespace android 120 121 #endif // PicturePile_h 122