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 31 namespace WebCore { 32 33 enum TurbulenceType { 34 FETURBULENCE_TYPE_UNKNOWN = 0, 35 FETURBULENCE_TYPE_FRACTALNOISE = 1, 36 FETURBULENCE_TYPE_TURBULENCE = 2 37 }; 38 39 class FETurbulence : public FilterEffect { 40 public: 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 virtual void apply(); 62 virtual void dump(); 63 determineAbsolutePaintRect()64 virtual void determineAbsolutePaintRect() { setAbsolutePaintRect(enclosingIntRect(maxEffectRect())); } 65 66 virtual TextStream& externalRepresentation(TextStream&, int indention) const; 67 68 private: 69 static const int s_blockSize = 256; 70 static const int s_blockMask = s_blockSize - 1; 71 72 struct PaintingData { 73 long seed; 74 int latticeSelector[2 * s_blockSize + 2]; 75 float gradient[4][2 * s_blockSize + 2][2]; 76 int width; // How much to subtract to wrap for stitching. 77 int height; 78 int wrapX; // Minimum value to wrap. 79 int wrapY; 80 int channel; 81 IntSize filterSize; 82 83 PaintingData(long paintingSeed, const IntSize& paintingSize); 84 inline long random(); 85 }; 86 87 FETurbulence(Filter*, TurbulenceType, float, float, int, float, bool); 88 89 inline void initPaint(PaintingData&); 90 float noise2D(PaintingData&, const FloatPoint&); 91 unsigned char calculateTurbulenceValueForPoint(PaintingData&, const FloatPoint&); 92 93 TurbulenceType m_type; 94 float m_baseFrequencyX; 95 float m_baseFrequencyY; 96 int m_numOctaves; 97 float m_seed; 98 bool m_stitchTiles; 99 }; 100 101 } // namespace WebCore 102 103 #endif // ENABLE(FILTERS) 104 105 #endif // FETurbulence_h 106