1 /* 2 * Copyright (c) 2010, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef TilingData_h 32 #define TilingData_h 33 34 #include <wtf/Noncopyable.h> 35 36 namespace WebCore { 37 38 class FloatRect; 39 class IntRect; 40 class IntPoint; 41 42 class TilingData { 43 WTF_MAKE_NONCOPYABLE(TilingData); 44 public: 45 TilingData(int maxTextureSize, int totalSizeX, int totalSizeY, bool hasBorderTexels); 46 void setTotalSize(int totalSizeX, int totalSizeY); 47 void setMaxTextureSize(int); 48 int maxTextureSize() const { return m_maxTextureSize; } 49 int totalSizeX() const { return m_totalSizeX; } 50 int totalSizeY() const { return m_totalSizeY; } 51 int borderTexels() const { return m_borderTexels; } 52 53 int numTiles() const { return numTilesX() * numTilesY(); } 54 int numTilesX() const { return m_numTilesX; } 55 int numTilesY() const { return m_numTilesY; } 56 int tileIndex(int x, int y) const { return x + y * numTilesX(); } 57 int tileXIndex(int tile) const { assertTile(tile); return tile % numTilesX(); } 58 int tileYIndex(int tile) const { assertTile(tile); return tile / numTilesX(); } 59 int tileXIndexFromSrcCoord(int) const; 60 int tileYIndexFromSrcCoord(int) const; 61 62 IntRect tileBounds(int tile) const; 63 IntRect tileBoundsWithBorder(int tile) const; 64 FloatRect tileBoundsNormalized(int tile) const; 65 int tilePositionX(int xIndex) const; 66 int tilePositionY(int yIndex) const; 67 int tileSizeX(int xIndex) const; 68 int tileSizeY(int yIndex) const; 69 IntRect overlappedTileIndices(const IntRect& srcRect) const; 70 IntRect overlappedTileIndices(const FloatRect& srcRect) const; 71 72 // Given a set of source and destination coordinates for a drawing quad 73 // in texel units, returns adjusted data to render just the one tile. 74 void intersectDrawQuad(const FloatRect& srcRect, const FloatRect& dstRect, int tile, FloatRect* newSrc, FloatRect* newDst) const; 75 76 // Difference between tileBound's and tileBoundWithBorder's location(). 77 IntPoint textureOffset(int xIndex, int yIndex) const; 78 79 private: 80 TilingData() : m_maxTextureSize(0), m_totalSizeX(0), m_totalSizeY(0) {} 81 void assertTile(int tile) const { ASSERT(tile >= 0 && tile < numTiles()); } 82 void recomputeNumTiles(); 83 84 int m_maxTextureSize; 85 int m_totalSizeX; 86 int m_totalSizeY; 87 int m_borderTexels; // 0 or 1 88 89 // computed values: 90 int m_numTilesX; 91 int m_numTilesY; 92 }; 93 94 } 95 96 #endif // TilingData_h 97
