1 /* 2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann (at) kde.org> 3 * Copyright (C) 2004, 2005 Rob Buis <buis (at) kde.org> 4 * Copyright (C) 2005 Eric Seidel <eric (at) 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 FEDisplacementMap_h 24 #define FEDisplacementMap_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 blink { 31 32 enum ChannelSelectorType { 33 CHANNEL_UNKNOWN = 0, 34 CHANNEL_R = 1, 35 CHANNEL_G = 2, 36 CHANNEL_B = 3, 37 CHANNEL_A = 4 38 }; 39 40 class PLATFORM_EXPORT FEDisplacementMap : public FilterEffect { 41 public: 42 static PassRefPtr<FEDisplacementMap> create(Filter*, ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, float); 43 44 ChannelSelectorType xChannelSelector() const; 45 bool setXChannelSelector(const ChannelSelectorType); 46 47 ChannelSelectorType yChannelSelector() const; 48 bool setYChannelSelector(const ChannelSelectorType); 49 50 float scale() const; 51 bool setScale(float); 52 53 virtual void setResultColorSpace(ColorSpace) OVERRIDE; 54 virtual void transformResultColorSpace(FilterEffect*, const int) OVERRIDE; 55 56 virtual FloatRect mapPaintRect(const FloatRect&, bool forward = true) OVERRIDE FINAL; 57 58 virtual TextStream& externalRepresentation(TextStream&, int indention) const OVERRIDE; 59 60 FloatRect determineAbsolutePaintRect(const FloatRect& requestedRect) OVERRIDE; 61 62 private: 63 FEDisplacementMap(Filter*, ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, float); 64 65 virtual void applySoftware() OVERRIDE; 66 67 virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) OVERRIDE; 68 69 ChannelSelectorType m_xChannelSelector; 70 ChannelSelectorType m_yChannelSelector; 71 float m_scale; 72 }; 73 74 } // namespace blink 75 76 #endif // FEDisplacementMap_h 77
