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 #define USE_RECORDING_CONTEXT true 42 #if USE_RECORDING_CONTEXT 43 namespace WebCore { 44 class Recording; 45 } 46 typedef WebCore::Recording Picture; 47 #else 48 class SkPicture; 49 typedef SkPicture Picture; 50 #endif 51 52 class SkCanvas; 53 54 namespace WebCore { 55 56 class GraphicsContext; 57 58 class PicturePainter { 59 public: 60 virtual void paintContents(GraphicsContext* gc, IntRect& dirty) = 0; createPrerenderCanvas(PrerenderedInval * prerendered)61 virtual SkCanvas* createPrerenderCanvas(PrerenderedInval* prerendered) 62 { 63 return 0; 64 } ~PicturePainter()65 virtual ~PicturePainter() {} 66 }; 67 68 class PictureContainer { 69 public: 70 Picture* picture; 71 IntRect area; 72 bool dirty; 73 RefPtr<PrerenderedInval> prerendered; 74 float maxZoomScale; 75 PictureContainer(const IntRect & area)76 PictureContainer(const IntRect& area) 77 : picture(0) 78 , area(area) 79 , dirty(true) 80 , maxZoomScale(1) 81 {} 82 83 PictureContainer(const PictureContainer& other); 84 ~PictureContainer(); 85 }; 86 87 class PicturePile { 88 public: PicturePile()89 PicturePile() {} 90 PicturePile(const PicturePile& other); 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 // UI-side methods used to check content, after construction/updates are complete 108 float maxZoomScale() const; 109 bool isEmpty() const; 110 111 private: 112 void applyWebkitInvals(); 113 void updatePicture(PicturePainter* painter, PictureContainer& container); 114 Picture* recordPicture(PicturePainter* painter, PictureContainer& container); 115 void appendToPile(const IntRect& inval, const IntRect& originalInval = IntRect()); 116 void drawWithClipRecursive(SkCanvas* canvas, int index); 117 void drawPicture(SkCanvas* canvas, PictureContainer& pc); 118 119 IntSize m_size; 120 Vector<PictureContainer> m_pile; 121 Vector<IntRect> m_webkitInvals; 122 SkRegion m_dirtyRegion; 123 }; 124 125 } // namespace android 126 127 #endif // PicturePile_h 128