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) 2010 Zoltan Herczeg <zherczeg@webkit.org> 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 */ 22 23 #ifndef FEConvolveMatrix_h 24 #define FEConvolveMatrix_h 25 26 #if ENABLE(FILTERS) 27 #include "FilterEffect.h" 28 #include "FloatPoint.h" 29 #include "FloatSize.h" 30 #include "Filter.h" 31 #include <wtf/AlwaysInline.h> 32 #include <wtf/Vector.h> 33 34 namespace WebCore { 35 36 enum EdgeModeType { 37 EDGEMODE_UNKNOWN = 0, 38 EDGEMODE_DUPLICATE = 1, 39 EDGEMODE_WRAP = 2, 40 EDGEMODE_NONE = 3 41 }; 42 43 class CanvasPixelArray; 44 45 class FEConvolveMatrix : public FilterEffect { 46 public: 47 static PassRefPtr<FEConvolveMatrix> create(Filter*, const IntSize&, 48 float, float, const IntPoint&, EdgeModeType, const FloatPoint&, 49 bool, const Vector<float>&); 50 51 IntSize kernelSize() const; 52 void setKernelSize(const IntSize&); 53 54 const Vector<float>& kernel() const; 55 void setKernel(const Vector<float>&); 56 57 float divisor() const; 58 bool setDivisor(float); 59 60 float bias() const; 61 bool setBias(float); 62 63 IntPoint targetOffset() const; 64 bool setTargetOffset(const IntPoint&); 65 66 EdgeModeType edgeMode() const; 67 bool setEdgeMode(EdgeModeType); 68 69 FloatPoint kernelUnitLength() const; 70 bool setKernelUnitLength(const FloatPoint&); 71 72 bool preserveAlpha() const; 73 bool setPreserveAlpha(bool); 74 75 virtual void apply(); 76 virtual void dump(); 77 determineAbsolutePaintRect()78 virtual void determineAbsolutePaintRect() { setAbsolutePaintRect(enclosingIntRect(maxEffectRect())); } 79 80 virtual TextStream& externalRepresentation(TextStream&, int indention) const; 81 82 private: 83 FEConvolveMatrix(Filter*, const IntSize&, float, float, 84 const IntPoint&, EdgeModeType, const FloatPoint&, bool, const Vector<float>&); 85 86 struct PaintingData { 87 ByteArray* srcPixelArray; 88 ByteArray* dstPixelArray; 89 int width; 90 int height; 91 float bias; 92 }; 93 94 template<bool preserveAlphaValues> 95 ALWAYS_INLINE void fastSetInteriorPixels(PaintingData&, int clipRight, int clipBottom); 96 97 ALWAYS_INLINE int getPixelValue(PaintingData&, int x, int y); 98 99 template<bool preserveAlphaValues> 100 void fastSetOuterPixels(PaintingData&, int x1, int y1, int x2, int y2); 101 102 // Wrapper functions 103 ALWAYS_INLINE void setInteriorPixels(PaintingData& paintingData, int clipRight, int clipBottom); 104 ALWAYS_INLINE void setOuterPixels(PaintingData& paintingData, int x1, int y1, int x2, int y2); 105 106 IntSize m_kernelSize; 107 float m_divisor; 108 float m_bias; 109 IntPoint m_targetOffset; 110 EdgeModeType m_edgeMode; 111 FloatPoint m_kernelUnitLength; 112 bool m_preserveAlpha; 113 Vector<float> m_kernelMatrix; 114 }; 115 116 } // namespace WebCore 117 118 #endif // ENABLE(FILTERS) 119 120 #endif // FEConvolveMatrix_h 121