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 Surface_h 27 #define Surface_h 28 29 #include "Color.h" 30 #include "IntRect.h" 31 #include "TilePainter.h" 32 #include "Vector.h" 33 34 class SkCanvas; 35 class SkRegion; 36 37 namespace WebCore { 38 39 class Tile; 40 class SurfaceBacking; 41 class LayerAndroid; 42 class TexturesResult; 43 44 class Surface : public TilePainter { 45 public: 46 Surface(); 47 virtual ~Surface(); 48 49 bool tryUpdateSurface(Surface* oldSurface); 50 51 void addLayer(LayerAndroid* layer, const TransformationMatrix& transform); 52 void prepareGL(bool layerTilesDisabled, bool updateWithBlit); 53 bool drawGL(bool layerTilesDisabled); 54 void swapTiles(bool calculateFrameworkInvals); 55 void addFrameworkInvals(); 56 bool isReady(); 57 bool isMissingContent(); 58 bool canUpdateWithBlit(); 59 60 void computeTexturesAmount(TexturesResult* result); 61 getFirstLayer()62 LayerAndroid* getFirstLayer() const { return m_layers[0]; } needsTexture()63 bool needsTexture() { return m_needsTexture; } 64 bool isBase(); 65 66 // don't allow transform fudging for merged layers - they need the transform 67 // static at paint time, and are always aligned to 0,0 doc coordinates. allowTransformFudging()68 bool allowTransformFudging() const { return singleLayer(); } 69 70 // TilePainter methods 71 virtual bool paint(SkCanvas* canvas); 72 virtual float opacity(); 73 virtual Color* background(); 74 virtual bool blitFromContents(Tile* tile); 75 76 private: 77 IntRect computePrepareArea(); 78 IntRect visibleContentArea(bool force3dContentVisible = false) const; 79 IntRect fullContentArea(); singleLayer()80 bool singleLayer() const { return m_layers.size() == 1; } 81 bool useAggressiveRendering(); 82 83 const TransformationMatrix* drawTransform(); 84 IntRect m_fullContentArea; 85 TransformationMatrix m_drawTransform; 86 87 SurfaceBacking* m_surfaceBacking; 88 bool m_needsTexture; 89 float m_maxZoomScale; 90 Vector<LayerAndroid*> m_layers; 91 92 Color m_background; 93 }; 94 95 class LayerMergeState { 96 public: LayerMergeState(Vector<Surface * > * const allGroups)97 LayerMergeState(Vector<Surface*>* const allGroups) 98 : surfaceList(allGroups) 99 , currentSurface(0) 100 , nonMergeNestedLevel(0) 101 , depth(0) 102 {} 103 104 // vector storing all generated layer groups 105 Vector<Surface*>* const surfaceList; 106 107 // currently merging group. if cleared, no more layers may join 108 Surface* currentSurface; 109 110 // records depth within non-mergeable parents (clipping, fixed, scrolling) 111 // and disable merging therein. 112 int nonMergeNestedLevel; 113 114 // counts layer tree depth for debugging 115 int depth; 116 }; 117 118 } // namespace WebCore 119 120 #endif //#define Surface_h 121