1 /* 2 Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> 3 2004, 2005 Rob Buis <buis@kde.org> 4 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 aint 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 SVGFEComponentTransfer_h 23 #define SVGFEComponentTransfer_h 24 25 #if ENABLE(FILTERS) 26 #include "FilterEffect.h" 27 28 #include "Filter.h" 29 #include <wtf/Vector.h> 30 31 namespace WebCore { 32 33 enum ComponentTransferType { 34 FECOMPONENTTRANSFER_TYPE_UNKNOWN = 0, 35 FECOMPONENTTRANSFER_TYPE_IDENTITY = 1, 36 FECOMPONENTTRANSFER_TYPE_TABLE = 2, 37 FECOMPONENTTRANSFER_TYPE_DISCRETE = 3, 38 FECOMPONENTTRANSFER_TYPE_LINEAR = 4, 39 FECOMPONENTTRANSFER_TYPE_GAMMA = 5 40 }; 41 42 struct ComponentTransferFunction { ComponentTransferFunctionComponentTransferFunction43 ComponentTransferFunction() 44 : type(FECOMPONENTTRANSFER_TYPE_UNKNOWN) 45 , slope(0.0f) 46 , intercept(0.0f) 47 , amplitude(0.0f) 48 , exponent(0.0f) 49 , offset(0.0f) 50 { 51 } 52 53 ComponentTransferType type; 54 55 float slope; 56 float intercept; 57 float amplitude; 58 float exponent; 59 float offset; 60 61 Vector<float> tableValues; 62 }; 63 64 class FEComponentTransfer : public FilterEffect { 65 public: 66 static PassRefPtr<FEComponentTransfer> create(FilterEffect*, const ComponentTransferFunction&, 67 const ComponentTransferFunction&, const ComponentTransferFunction&, const ComponentTransferFunction&); 68 69 ComponentTransferFunction redFunction() const; 70 void setRedFunction(const ComponentTransferFunction&); 71 72 ComponentTransferFunction greenFunction() const; 73 void setGreenFunction(const ComponentTransferFunction&); 74 75 ComponentTransferFunction blueFunction() const; 76 void setBlueFunction(const ComponentTransferFunction&); 77 78 ComponentTransferFunction alphaFunction() const; 79 void setAlphaFunction(const ComponentTransferFunction&); 80 uniteChildEffectSubregions(Filter * filter)81 virtual FloatRect uniteChildEffectSubregions(Filter* filter) { return calculateUnionOfChildEffectSubregions(filter, m_in.get()); } 82 void apply(Filter*); 83 void dump(); 84 85 private: 86 FEComponentTransfer(FilterEffect*,const ComponentTransferFunction&, const ComponentTransferFunction&, 87 const ComponentTransferFunction&, const ComponentTransferFunction&); 88 89 RefPtr<FilterEffect> m_in; 90 ComponentTransferFunction m_redFunc; 91 ComponentTransferFunction m_greenFunc; 92 ComponentTransferFunction m_blueFunc; 93 ComponentTransferFunction m_alphaFunc; 94 }; 95 96 } // namespace WebCore 97 98 #endif // ENABLE(FILTERS) 99 100 #endif // SVGFEComponentTransfer_h 101