1 /* 2 * Copyright (C) 2008 Alex Mathews <possessedpenguinbob (at) gmail.com> 3 * Copyright (C) 2009 Dirk Schulze <krit (at) webkit.org> 4 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 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 * along 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 FilterEffect_h 23 #define FilterEffect_h 24 25 #if ENABLE(FILTERS) 26 #include "FloatRect.h" 27 #include "IntRect.h" 28 29 #include <wtf/ByteArray.h> 30 #include <wtf/PassOwnPtr.h> 31 #include <wtf/RefCounted.h> 32 #include <wtf/RefPtr.h> 33 #include <wtf/Vector.h> 34 35 static const float kMaxFilterSize = 5000.0f; 36 37 namespace WebCore { 38 39 class Filter; 40 class FilterEffect; 41 class ImageBuffer; 42 class TextStream; 43 44 typedef Vector<RefPtr<FilterEffect> > FilterEffectVector; 45 46 enum FilterEffectType { 47 FilterEffectTypeUnknown, 48 FilterEffectTypeImage, 49 FilterEffectTypeTile, 50 FilterEffectTypeSourceInput 51 }; 52 53 class FilterEffect : public RefCounted<FilterEffect> { 54 public: 55 virtual ~FilterEffect(); 56 57 bool hasResult() const { return m_imageBufferResult || m_unmultipliedImageResult || m_premultipliedImageResult; } 58 void clearResult(); 59 ImageBuffer* asImageBuffer(); 60 PassRefPtr<ByteArray> asUnmultipliedImage(const IntRect&); 61 PassRefPtr<ByteArray> asPremultipliedImage(const IntRect&); 62 void copyUnmultipliedImage(ByteArray* destination, const IntRect&); 63 void copyPremultipliedImage(ByteArray* destination, const IntRect&); 64 65 FilterEffectVector& inputEffects() { return m_inputEffects; } 66 FilterEffect* inputEffect(unsigned) const; 67 unsigned numberOfEffectInputs() const { return m_inputEffects.size(); } 68 69 IntRect drawingRegionOfInputImage(const IntRect&) const; 70 IntRect requestedRegionOfInputImageData(const IntRect&) const; 71 72 // Solid black image with different alpha values. 73 bool isAlphaImage() const { return m_alphaImage; } 74 void setIsAlphaImage(bool alphaImage) { m_alphaImage = alphaImage; } 75 76 IntRect absolutePaintRect() const { return m_absolutePaintRect; } 77 void setAbsolutePaintRect(const IntRect& absolutePaintRect) { m_absolutePaintRect = absolutePaintRect; } 78 79 FloatRect maxEffectRect() const { return m_maxEffectRect; } 80 void setMaxEffectRect(const FloatRect& maxEffectRect) { m_maxEffectRect = maxEffectRect; } 81 82 virtual void apply() = 0; 83 virtual void dump() = 0; 84 85 virtual void determineAbsolutePaintRect(); 86 87 virtual FilterEffectType filterEffectType() const { return FilterEffectTypeUnknown; } 88 89 virtual TextStream& externalRepresentation(TextStream&, int indention = 0) const; 90 91 public: 92 // The following functions are SVG specific and will move to RenderSVGResourceFilterPrimitive. 93 // See bug https://bugs.webkit.org/show_bug.cgi?id=45614. 94 bool hasX() const { return m_hasX; } 95 void setHasX(bool value) { m_hasX = value; } 96 97 bool hasY() const { return m_hasY; } 98 void setHasY(bool value) { m_hasY = value; } 99 100 bool hasWidth() const { return m_hasWidth; } 101 void setHasWidth(bool value) { m_hasWidth = value; } 102 103 bool hasHeight() const { return m_hasHeight; } 104 void setHasHeight(bool value) { m_hasHeight = value; } 105 106 FloatRect filterPrimitiveSubregion() const { return m_filterPrimitiveSubregion; } 107 void setFilterPrimitiveSubregion(const FloatRect& filterPrimitiveSubregion) { m_filterPrimitiveSubregion = filterPrimitiveSubregion; } 108 109 FloatRect effectBoundaries() const { return m_effectBoundaries; } 110 void setEffectBoundaries(const FloatRect& effectBoundaries) { m_effectBoundaries = effectBoundaries; } 111 112 Filter* filter() { return m_filter; } 113 114 protected: 115 FilterEffect(Filter*); 116 117 ImageBuffer* createImageBufferResult(); 118 ByteArray* createUnmultipliedImageResult(); 119 ByteArray* createPremultipliedImageResult(); 120 121 private: 122 OwnPtr<ImageBuffer> m_imageBufferResult; 123 RefPtr<ByteArray> m_unmultipliedImageResult; 124 RefPtr<ByteArray> m_premultipliedImageResult; 125 FilterEffectVector m_inputEffects; 126 127 bool m_alphaImage; 128 129 IntRect m_absolutePaintRect; 130 131 // The maximum size of a filter primitive. In SVG this is the primitive subregion in absolute coordinate space. 132 // The absolute paint rect should never be bigger than m_maxEffectRect. 133 FloatRect m_maxEffectRect; 134 Filter* m_filter; 135 136 private: 137 inline void copyImageBytes(ByteArray* source, ByteArray* destination, const IntRect&); 138 139 // The following member variables are SVG specific and will move to RenderSVGResourceFilterPrimitive. 140 // See bug https://bugs.webkit.org/show_bug.cgi?id=45614. 141 142 // The subregion of a filter primitive according to the SVG Filter specification in local coordinates. 143 // This is SVG specific and needs to move to RenderSVGResourceFilterPrimitive. 144 FloatRect m_filterPrimitiveSubregion; 145 146 // x, y, width and height of the actual SVGFE*Element. Is needed to determine the subregion of the 147 // filter primitive on a later step. 148 FloatRect m_effectBoundaries; 149 bool m_hasX; 150 bool m_hasY; 151 bool m_hasWidth; 152 bool m_hasHeight; 153 }; 154 155 } // namespace WebCore 156 157 #endif // ENABLE(FILTERS) 158 159 #endif // FilterEffect_h 160
