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 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 */ 21 22#ifndef FEColorMatrix_h 23#define FEColorMatrix_h 24 25#if ENABLE(FILTERS) 26#include "FilterEffect.h" 27 28#include "Filter.h" 29#include <wtf/Vector.h> 30 31namespace WebCore { 32 33enum ColorMatrixType { 34 FECOLORMATRIX_TYPE_UNKNOWN = 0, 35 FECOLORMATRIX_TYPE_MATRIX = 1, 36 FECOLORMATRIX_TYPE_SATURATE = 2, 37 FECOLORMATRIX_TYPE_HUEROTATE = 3, 38 FECOLORMATRIX_TYPE_LUMINANCETOALPHA = 4 39}; 40 41class FEColorMatrix : public FilterEffect { 42public: 43 static PassRefPtr<FEColorMatrix> create(Filter*, ColorMatrixType, const Vector<float>&); 44 45 ColorMatrixType type() const; 46 bool setType(ColorMatrixType); 47 48 const Vector<float>& values() const; 49 bool setValues(const Vector<float>&); 50 51 virtual void platformApplySoftware(); 52#if ENABLE(OPENCL) 53 virtual bool platformApplyOpenCL(); 54#endif 55 virtual void dump(); 56 57 virtual TextStream& externalRepresentation(TextStream&, int indention) const; 58 59 static inline void calculateSaturateComponents(float* components, float value); 60 static inline void calculateHueRotateComponents(float* components, float value); 61 62private: 63 FEColorMatrix(Filter*, ColorMatrixType, const Vector<float>&); 64 65 ColorMatrixType m_type; 66 Vector<float> m_values; 67}; 68 69inline void FEColorMatrix::calculateSaturateComponents(float* components, float value) 70{ 71 components[0] = (0.213 + 0.787 * value); 72 components[1] = (0.715 - 0.715 * value); 73 components[2] = (0.072 - 0.072 * value); 74 components[3] = (0.213 - 0.213 * value); 75 components[4] = (0.715 + 0.285 * value); 76 components[5] = (0.072 - 0.072 * value); 77 components[6] = (0.213 - 0.213 * value); 78 components[7] = (0.715 - 0.715 * value); 79 components[8] = (0.072 + 0.928 * value); 80} 81 82inline void FEColorMatrix::calculateHueRotateComponents(float* components, float value) 83{ 84 float cosHue = cos(value * piFloat / 180); 85 float sinHue = sin(value * piFloat / 180); 86 components[0] = 0.213 + cosHue * 0.787 - sinHue * 0.213; 87 components[1] = 0.715 - cosHue * 0.715 - sinHue * 0.715; 88 components[2] = 0.072 - cosHue * 0.072 + sinHue * 0.928; 89 components[3] = 0.213 - cosHue * 0.213 + sinHue * 0.143; 90 components[4] = 0.715 + cosHue * 0.285 + sinHue * 0.140; 91 components[5] = 0.072 - cosHue * 0.072 - sinHue * 0.283; 92 components[6] = 0.213 - cosHue * 0.213 - sinHue * 0.787; 93 components[7] = 0.715 - cosHue * 0.715 + sinHue * 0.715; 94 components[8] = 0.072 + cosHue * 0.928 + sinHue * 0.072; 95} 96 97 98} // namespace WebCore 99 100#endif // ENABLE(FILTERS) 101 102#endif // FEColorMatrix_h 103