1 /* 2 * Copyright 2011, 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 TileGrid_h 27 #define TileGrid_h 28 29 #include "IntRect.h" 30 #include "SkRegion.h" 31 32 #include <wtf/Vector.h> 33 34 namespace WebCore { 35 36 class Color; 37 class GLWebViewState; 38 class Tile; 39 class TilePainter; 40 class TransformationMatrix; 41 42 class TileGrid { 43 public: 44 enum PrepareRegionFlags { EmptyRegion = 0x0, StandardRegion = 0x1, ExpandedRegion = 0x2 }; 45 46 TileGrid(bool isBaseSurface); 47 virtual ~TileGrid(); 48 49 static IntRect computeTilesArea(const IntRect& contentArea, float scale); 50 51 void prepareGL(GLWebViewState* state, float scale, 52 const IntRect& prepareArea, const IntRect& fullContentArea, 53 TilePainter* painter, int regionFlags = StandardRegion, 54 bool isLowResPrefetch = false, bool updateWithBlit = false); 55 bool swapTiles(); 56 void drawGL(const IntRect& visibleContentArea, float opacity, 57 const TransformationMatrix* transform, const Color* background = 0); 58 59 void markAsDirty(const SkRegion& dirtyArea); 60 61 Tile* getTile(int x, int y); 62 63 void removeTiles(); 64 void discardTextures(); 65 66 bool isReady(); 67 bool isMissingContent(); isDirty()68 bool isDirty() { return !m_dirtyRegion.isEmpty(); } 69 70 int nbTextures(const IntRect& area, float scale); 71 unsigned int getImageTextureId(); 72 73 private: 74 void prepareTile(int x, int y, TilePainter* painter, 75 GLWebViewState* state, bool isLowResPrefetch, 76 bool isExpandPrefetch, bool shouldTryUpdateWithBlit); 77 void drawMissingRegion(const SkRegion& region, float opacity, const Color* tileBackground); 78 bool tryBlitFromContents(Tile* tile, TilePainter* painter); 79 80 WTF::Vector<Tile*> m_tiles; 81 82 IntRect m_area; 83 84 SkRegion m_dirtyRegion; 85 86 int m_prevTileY; 87 float m_scale; 88 89 bool m_isBaseSurface; 90 }; 91 92 } // namespace WebCore 93 94 #endif // TileGrid_h 95