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) 2013 Google Inc. All rights reserved. 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 FEComposite_h 24 #define FEComposite_h 25 26 #include "platform/graphics/filters/Filter.h" 27 #include "platform/graphics/filters/FilterEffect.h" 28 #include "wtf/text/WTFString.h" 29 30 namespace WebCore { 31 32 enum CompositeOperationType { 33 FECOMPOSITE_OPERATOR_UNKNOWN = 0, 34 FECOMPOSITE_OPERATOR_OVER = 1, 35 FECOMPOSITE_OPERATOR_IN = 2, 36 FECOMPOSITE_OPERATOR_OUT = 3, 37 FECOMPOSITE_OPERATOR_ATOP = 4, 38 FECOMPOSITE_OPERATOR_XOR = 5, 39 FECOMPOSITE_OPERATOR_ARITHMETIC = 6 40 }; 41 42 class PLATFORM_EXPORT FEComposite : public FilterEffect { 43 public: 44 static PassRefPtr<FEComposite> create(Filter*, const CompositeOperationType&, float, float, float, float); 45 46 CompositeOperationType operation() const; 47 bool setOperation(CompositeOperationType); 48 49 float k1() const; 50 bool setK1(float); 51 52 float k2() const; 53 bool setK2(float); 54 55 float k3() const; 56 bool setK3(float); 57 58 float k4() const; 59 bool setK4(float); 60 61 virtual void correctFilterResultIfNeeded() OVERRIDE; 62 63 virtual FloatRect determineAbsolutePaintRect(const FloatRect& requestedRect) OVERRIDE; 64 65 virtual TextStream& externalRepresentation(TextStream&, int indention) const OVERRIDE; 66 67 virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) OVERRIDE; 68 virtual PassRefPtr<SkImageFilter> createImageFilterWithoutValidation(SkiaImageFilterBuilder*) OVERRIDE; 69 70 protected: mayProduceInvalidPreMultipliedPixels()71 virtual bool mayProduceInvalidPreMultipliedPixels() OVERRIDE { return m_type == FECOMPOSITE_OPERATOR_ARITHMETIC; } 72 73 private: 74 FEComposite(Filter*, const CompositeOperationType&, float, float, float, float); 75 76 virtual void applySoftware() OVERRIDE; 77 PassRefPtr<SkImageFilter> createImageFilterInternal(SkiaImageFilterBuilder*, bool requiresPMColorValidation); 78 79 inline void platformArithmeticSoftware(Uint8ClampedArray* source, Uint8ClampedArray* destination, 80 float k1, float k2, float k3, float k4); 81 template <int b1, int b4> 82 static inline void computeArithmeticPixelsNeon(unsigned char* source, unsigned char* destination, 83 unsigned pixelArrayLength, float k1, float k2, float k3, float k4); 84 static inline void platformArithmeticNeon(unsigned char* source, unsigned char* destination, 85 unsigned pixelArrayLength, float k1, float k2, float k3, float k4); 86 87 CompositeOperationType m_type; 88 float m_k1; 89 float m_k2; 90 float m_k3; 91 float m_k4; 92 }; 93 94 } // namespace WebCore 95 96 #endif // FEComposite_h 97