1/* 2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> 3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org> 4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org> 5 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> 6 * Copyright (C) 2010 Renata Hodovan <reni@inf.u-szeged.hu> 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public License 19 * along with this library; see the file COPYING.LIB. If not, write to 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 */ 23 24#ifndef FETurbulence_h 25#define FETurbulence_h 26 27#if ENABLE(FILTERS) 28#include "FilterEffect.h" 29#include "Filter.h" 30 31namespace WebCore { 32 33enum TurbulenceType { 34 FETURBULENCE_TYPE_UNKNOWN = 0, 35 FETURBULENCE_TYPE_FRACTALNOISE = 1, 36 FETURBULENCE_TYPE_TURBULENCE = 2 37}; 38 39class FETurbulence : public FilterEffect { 40public: 41 static PassRefPtr<FETurbulence> create(Filter*, TurbulenceType, float, float, int, float, bool); 42 43 TurbulenceType type() const; 44 bool setType(TurbulenceType); 45 46 float baseFrequencyY() const; 47 bool setBaseFrequencyY(float); 48 49 float baseFrequencyX() const; 50 bool setBaseFrequencyX(float); 51 52 float seed() const; 53 bool setSeed(float); 54 55 int numOctaves() const; 56 bool setNumOctaves(int); 57 58 bool stitchTiles() const; 59 bool setStitchTiles(bool); 60 61 static void fillRegionWorker(void*); 62 63 virtual void platformApplySoftware(); 64#if ENABLE(OPENCL) 65 virtual bool platformApplyOpenCL(); 66#endif 67 virtual void dump(); 68 69 virtual void determineAbsolutePaintRect() { setAbsolutePaintRect(enclosingIntRect(maxEffectRect())); } 70 71 virtual TextStream& externalRepresentation(TextStream&, int indention) const; 72 73private: 74 static const int s_blockSize = 256; 75 static const int s_blockMask = s_blockSize - 1; 76 77 static const int s_minimalRectDimension = (100 * 100); // Empirical data limit for parallel jobs. 78 79 struct PaintingData { 80 PaintingData(long paintingSeed, const IntSize& paintingSize) 81 : seed(paintingSeed) 82 , filterSize(paintingSize) 83 { 84 } 85 86 long seed; 87 int latticeSelector[2 * s_blockSize + 2]; 88 float gradient[4][2 * s_blockSize + 2][2]; 89 IntSize filterSize; 90 91 inline long random(); 92 }; 93 94 struct StitchData { 95 StitchData() 96 : width(0) 97 , wrapX(0) 98 , height(0) 99 , wrapY(0) 100 { 101 } 102 103 int width; // How much to subtract to wrap for stitching. 104 int wrapX; // Minimum value to wrap. 105 int height; 106 int wrapY; 107 }; 108 109 template<typename Type> 110 friend class ParallelJobs; 111 112 struct FillRegionParameters { 113 FETurbulence* filter; 114 Uint8ClampedArray* pixelArray; 115 PaintingData* paintingData; 116 int startY; 117 int endY; 118 }; 119 120 static void fillRegionWorker(FillRegionParameters*); 121 122 FETurbulence(Filter*, TurbulenceType, float, float, int, float, bool); 123 124 inline void initPaint(PaintingData&); 125 float noise2D(int channel, PaintingData&, StitchData&, const FloatPoint&); 126 unsigned char calculateTurbulenceValueForPoint(int channel, PaintingData&, StitchData&, const FloatPoint&); 127 inline void fillRegion(Uint8ClampedArray*, PaintingData&, int, int); 128 129 TurbulenceType m_type; 130 float m_baseFrequencyX; 131 float m_baseFrequencyY; 132 int m_numOctaves; 133 float m_seed; 134 bool m_stitchTiles; 135}; 136 137} // namespace WebCore 138 139#endif // ENABLE(FILTERS) 140 141#endif // FETurbulence_h 142