1 /* 2 * Copyright (C) 2009 Dirk Schulze <krit (at) webkit.org> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef Filter_h 21 #define Filter_h 22 23 #if ENABLE(FILTERS) 24 #include "FloatRect.h" 25 #include "FloatSize.h" 26 #include "ImageBuffer.h" 27 28 #include <wtf/PassRefPtr.h> 29 #include <wtf/RefCounted.h> 30 #include <wtf/RefPtr.h> 31 #include <wtf/text/StringHash.h> 32 33 namespace WebCore { 34 35 class FilterEffect; 36 37 class Filter : public RefCounted<Filter> { 38 public: 39 virtual ~Filter() { } 40 41 void setSourceImage(PassOwnPtr<ImageBuffer> sourceImage) { m_sourceImage = sourceImage; } 42 ImageBuffer* sourceImage() { return m_sourceImage.get(); } 43 44 FloatSize filterResolution() const { return m_filterResolution; } 45 void setFilterResolution(const FloatSize& filterResolution) { m_filterResolution = filterResolution; } 46 47 virtual float applyHorizontalScale(float value) const { return value * m_filterResolution.width(); } 48 virtual float applyVerticalScale(float value) const { return value * m_filterResolution.height(); } 49 50 virtual FloatRect sourceImageRect() const = 0; 51 virtual FloatRect filterRegion() const = 0; 52 53 virtual FloatPoint mapAbsolutePointToLocalPoint(const FloatPoint&) const { return FloatPoint(); } 54 55 virtual FloatRect filterRegionInUserSpace() const { return FloatRect(); } 56 57 virtual bool effectBoundingBoxMode() const = 0; 58 59 private: 60 OwnPtr<ImageBuffer> m_sourceImage; 61 FloatSize m_filterResolution; 62 }; 63 64 } // namespace WebCore 65 66 #endif // ENABLE(FILTERS) 67 68 #endif // Filter_h 69
