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 "IntSize.h" 35#include <wtf/Noncopyable.h> 36 37namespace WebCore { 38 39class FloatRect; 40class IntRect; 41class IntPoint; 42 43class TilingData { 44public: 45 TilingData(const IntSize& maxTextureSize, const IntSize& totalSize, bool hasBorderTexels); 46 47 void setTotalSize(const IntSize&); 48 const IntSize& totalSize() const { return m_totalSize; } 49 void setMaxTextureSize(const IntSize&); 50 const IntSize& maxTextureSize() const { return m_maxTextureSize; } 51 void setHasBorderTexels(bool); 52 int borderTexels() const { return m_borderTexels; } 53 54 bool hasEmptyBounds() const { return !numTilesX() || !numTilesY(); } 55 int numTilesX() const { return m_numTilesX; } 56 int numTilesY() const { return m_numTilesY; } 57 int tileXIndexFromSrcCoord(int) const; 58 int tileYIndexFromSrcCoord(int) const; 59 60 IntRect tileBounds(int, int) const; 61 IntRect tileBoundsWithBorder(int, int) const; 62 int tilePositionX(int xIndex) const; 63 int tilePositionY(int yIndex) const; 64 int tileSizeX(int xIndex) const; 65 int tileSizeY(int yIndex) const; 66 67 // Difference between tileBound's and tileBoundWithBorder's location(). 68 IntPoint textureOffset(int xIndex, int yIndex) const; 69 70private: 71 TilingData() : m_borderTexels(0) { } 72 void assertTile(int i, int j) const { ASSERT_UNUSED(i, i >= 0 && i < numTilesX()); ASSERT_UNUSED(j, j >= 0 && j < numTilesY()); } 73 void recomputeNumTiles(); 74 75 IntSize m_maxTextureSize; 76 IntSize m_totalSize; 77 int m_borderTexels; // 0 or 1 78 79 // computed values: 80 int m_numTilesX; 81 int m_numTilesY; 82}; 83 84} 85 86#endif // TilingData_h 87