1 /* 2 * Copyright (C) 2009 Dirk Schulze <krit (at) webkit.org> 3 * Copyright (C) 2013 Google Inc. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef Filter_h 22 #define Filter_h 23 24 #include "core/platform/graphics/FloatRect.h" 25 #include "core/platform/graphics/FloatSize.h" 26 #include "core/platform/graphics/ImageBuffer.h" 27 #include "wtf/RefCounted.h" 28 29 namespace WebCore { 30 31 class FilterEffect; 32 33 class Filter : public RefCounted<Filter> { 34 public: 35 Filter(const AffineTransform& absoluteTransform) : m_renderingMode(Unaccelerated), m_absoluteTransform(absoluteTransform) { } 36 virtual ~Filter() { } 37 38 void setSourceImage(PassOwnPtr<ImageBuffer> sourceImage) { m_sourceImage = sourceImage; } 39 ImageBuffer* sourceImage() { return m_sourceImage.get(); } 40 41 FloatSize filterResolution() const { return m_filterResolution; } 42 void setFilterResolution(const FloatSize& filterResolution) { m_filterResolution = filterResolution; } 43 44 const AffineTransform& absoluteTransform() const { return m_absoluteTransform; } 45 void setAbsoluteTransform(const AffineTransform& absoluteTransform) { m_absoluteTransform = absoluteTransform; } 46 FloatPoint mapAbsolutePointToLocalPoint(const FloatPoint& point) const { return m_absoluteTransform.inverse().mapPoint(point); } 47 48 RenderingMode renderingMode() const { return m_renderingMode; } 49 void setRenderingMode(RenderingMode renderingMode) { m_renderingMode = renderingMode; } 50 51 virtual float applyHorizontalScale(float value) const 52 { 53 float filterRegionScale = absoluteFilterRegion().isEmpty() || filterRegion().isEmpty() ? 54 1.0f : absoluteFilterRegion().width() / filterRegion().width(); 55 return value * m_filterResolution.width() * filterRegionScale; 56 } 57 virtual float applyVerticalScale(float value) const 58 { 59 float filterRegionScale = absoluteFilterRegion().isEmpty() || filterRegion().isEmpty() ? 60 1.0f : absoluteFilterRegion().height() / filterRegion().height(); 61 return value * m_filterResolution.height() * filterRegionScale; 62 } 63 64 virtual FloatRect sourceImageRect() const = 0; 65 66 FloatRect absoluteFilterRegion() const { return m_absoluteFilterRegion; } 67 void setAbsoluteFilterRegion(const FloatRect& rect) { m_absoluteFilterRegion = rect; } 68 69 FloatRect filterRegion() const { return m_filterRegion; } 70 void setFilterRegion(const FloatRect& rect) { m_filterRegion = rect; } 71 72 private: 73 OwnPtr<ImageBuffer> m_sourceImage; 74 FloatSize m_filterResolution; 75 RenderingMode m_renderingMode; 76 AffineTransform m_absoluteTransform; 77 FloatRect m_absoluteFilterRegion; 78 FloatRect m_filterRegion; 79 }; 80 81 } // namespace WebCore 82 83 #endif // Filter_h 84
