1 /* 2 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann (at) kde.org> 3 * (C) 2009 Dirk Schulze <krit (at) webkit.org> 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "config.h" 28 29 #if ENABLE(SVG) 30 #include "SVGResourceClipper.h" 31 32 #include "AffineTransform.h" 33 #include "GraphicsContext.h" 34 #include "SVGRenderTreeAsText.h" 35 36 #if PLATFORM(CG) 37 #include <ApplicationServices/ApplicationServices.h> 38 #endif 39 40 namespace WebCore { 41 42 SVGResourceClipper::SVGResourceClipper() 43 : SVGResource() 44 { 45 } 46 47 SVGResourceClipper::~SVGResourceClipper() 48 { 49 } 50 51 void SVGResourceClipper::resetClipData() 52 { 53 m_clipData.clear(); 54 m_clipperBoundingBox = FloatRect(); 55 } 56 57 void SVGResourceClipper::invalidate() 58 { 59 SVGResource::invalidate(); 60 resetClipData(); 61 } 62 63 FloatRect SVGResourceClipper::clipperBoundingBox(const FloatRect& objectBoundingBox) 64 { 65 // FIXME: We need a different calculation for other clip content than paths. 66 if (!m_clipperBoundingBox.isEmpty()) 67 return m_clipperBoundingBox; 68 69 if (m_clipData.clipData().isEmpty()) 70 return FloatRect(); 71 72 for (unsigned x = 0; x < m_clipData.clipData().size(); x++) { 73 ClipData clipData = m_clipData.clipData()[x]; 74 75 FloatRect clipPathRect = clipData.path.boundingRect(); 76 if (clipData.bboxUnits) { 77 clipPathRect.scale(objectBoundingBox.width(), objectBoundingBox.height()); 78 clipPathRect.move(objectBoundingBox.x(), objectBoundingBox.y()); 79 } 80 m_clipperBoundingBox.unite(clipPathRect); 81 } 82 83 return m_clipperBoundingBox; 84 } 85 86 void SVGResourceClipper::applyClip(GraphicsContext* context, const FloatRect& boundingBox) const 87 { 88 if (m_clipData.clipData().isEmpty()) 89 return; 90 91 bool heterogenousClipRules = false; 92 WindRule clipRule = m_clipData.clipData()[0].windRule; 93 94 context->beginPath(); 95 96 for (unsigned x = 0; x < m_clipData.clipData().size(); x++) { 97 ClipData clipData = m_clipData.clipData()[x]; 98 if (clipData.windRule != clipRule) 99 heterogenousClipRules = true; 100 101 Path clipPath = clipData.path; 102 103 if (clipData.bboxUnits) { 104 AffineTransform transform; 105 transform.translate(boundingBox.x(), boundingBox.y()); 106 transform.scaleNonUniform(boundingBox.width(), boundingBox.height()); 107 clipPath.transform(transform); 108 } 109 context->addPath(clipPath); 110 } 111 112 // FIXME! 113 // We don't currently allow for heterogenous clip rules. 114 // we would have to detect such, draw to a mask, and then clip 115 // to that mask 116 context->clipPath(clipRule); 117 } 118 119 void SVGResourceClipper::addClipData(const Path& path, WindRule rule, bool bboxUnits) 120 { 121 m_clipData.addPath(path, rule, bboxUnits); 122 } 123 124 const ClipDataList& SVGResourceClipper::clipData() const 125 { 126 return m_clipData; 127 } 128 129 TextStream& SVGResourceClipper::externalRepresentation(TextStream& ts) const 130 { 131 ts << "[type=CLIPPER]"; 132 ts << " [clip data=" << clipData().clipData() << "]"; 133 return ts; 134 } 135 136 TextStream& operator<<(TextStream& ts, WindRule rule) 137 { 138 switch (rule) { 139 case RULE_NONZERO: 140 ts << "NON-ZERO"; break; 141 case RULE_EVENODD: 142 ts << "EVEN-ODD"; break; 143 } 144 145 return ts; 146 } 147 148 TextStream& operator<<(TextStream& ts, const ClipData& d) 149 { 150 ts << "[winding=" << d.windRule << "]"; 151 152 if (d.bboxUnits) 153 ts << " [bounding box mode=" << d.bboxUnits << "]"; 154 155 ts << " [path=" << d.path.debugString() << "]"; 156 return ts; 157 } 158 159 SVGResourceClipper* getClipperById(Document* document, const AtomicString& id, const RenderObject* object) 160 { 161 SVGResource* resource = getResourceById(document, id, object); 162 if (resource && resource->isClipper()) 163 return static_cast<SVGResourceClipper*>(resource); 164 165 return 0; 166 } 167 168 } // namespace WebCore 169 170 #endif 171
