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/*
* Copyright (c) 2010, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TilingData_h
#define TilingData_h
#include <wtf/Noncopyable.h>
namespace WebCore {
class FloatRect;
class IntRect;
class IntPoint;
class TilingData {
WTF_MAKE_NONCOPYABLE(TilingData);
public:
TilingData(int maxTextureSize, int totalSizeX, int totalSizeY, bool hasBorderTexels);
void setTotalSize(int totalSizeX, int totalSizeY);
void setMaxTextureSize(int);
int maxTextureSize() const { return m_maxTextureSize; }
int totalSizeX() const { return m_totalSizeX; }
int totalSizeY() const { return m_totalSizeY; }
int borderTexels() const { return m_borderTexels; }
int numTiles() const { return numTilesX() * numTilesY(); }
int numTilesX() const { return m_numTilesX; }
int numTilesY() const { return m_numTilesY; }
int tileIndex(int x, int y) const { return x + y * numTilesX(); }
int tileXIndex(int tile) const { assertTile(tile); return tile % numTilesX(); }
int tileYIndex(int tile) const { assertTile(tile); return tile / numTilesX(); }
int tileXIndexFromSrcCoord(int) const;
int tileYIndexFromSrcCoord(int) const;
IntRect tileBounds(int tile) const;
IntRect tileBoundsWithBorder(int tile) const;
FloatRect tileBoundsNormalized(int tile) const;
int tilePositionX(int xIndex) const;
int tilePositionY(int yIndex) const;
int tileSizeX(int xIndex) const;
int tileSizeY(int yIndex) const;
IntRect overlappedTileIndices(const IntRect& srcRect) const;
IntRect overlappedTileIndices(const FloatRect& srcRect) const;
// Given a set of source and destination coordinates for a drawing quad
// in texel units, returns adjusted data to render just the one tile.
void intersectDrawQuad(const FloatRect& srcRect, const FloatRect& dstRect, int tile, FloatRect* newSrc, FloatRect* newDst) const;
// Difference between tileBound's and tileBoundWithBorder's location().
IntPoint textureOffset(int xIndex, int yIndex) const;
private:
TilingData() : m_maxTextureSize(0), m_totalSizeX(0), m_totalSizeY(0) {}
void assertTile(int tile) const { ASSERT(tile >= 0 && tile < numTiles()); }
void recomputeNumTiles();
int m_maxTextureSize;
int m_totalSizeX;
int m_totalSizeY;
int m_borderTexels; // 0 or 1
// computed values:
int m_numTilesX;
int m_numTilesY;
};
}
#endif // TilingData_h
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