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) 2009 Dirk Schulze <krit (at) webkit.org> 6 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 7 * Copyright (C) 2013 Google Inc. All rights reserved. 8 * 9 * This library is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Library General Public 11 * License as published by the Free Software Foundation; either 12 * version 2 of the License, or (at your option) any later version. 13 * 14 * This library is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Library General Public License for more details. 18 * 19 * You should have received a copy of the GNU Library General Public License 20 * along with this library; see the file COPYING.LIB. If not, write to 21 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 22 * Boston, MA 02110-1301, USA. 23 */ 24 25 #include "config.h" 26 #include "platform/graphics/filters/FEMorphology.h" 27 28 #include "SkMorphologyImageFilter.h" 29 #include "platform/graphics/GraphicsContext.h" 30 #include "platform/graphics/Image.h" 31 #include "platform/graphics/filters/ParallelJobs.h" 32 #include "platform/graphics/filters/SkiaImageFilterBuilder.h" 33 #include "platform/text/TextStream.h" 34 #include "wtf/Uint8ClampedArray.h" 35 #include "wtf/Vector.h" 36 37 using namespace std; 38 39 namespace WebCore { 40 41 FEMorphology::FEMorphology(Filter* filter, MorphologyOperatorType type, float radiusX, float radiusY) 42 : FilterEffect(filter) 43 , m_type(type) 44 , m_radiusX(radiusX) 45 , m_radiusY(radiusY) 46 { 47 } 48 49 PassRefPtr<FEMorphology> FEMorphology::create(Filter* filter, MorphologyOperatorType type, float radiusX, float radiusY) 50 { 51 return adoptRef(new FEMorphology(filter, type, radiusX, radiusY)); 52 } 53 54 MorphologyOperatorType FEMorphology::morphologyOperator() const 55 { 56 return m_type; 57 } 58 59 bool FEMorphology::setMorphologyOperator(MorphologyOperatorType type) 60 { 61 if (m_type == type) 62 return false; 63 m_type = type; 64 return true; 65 } 66 67 float FEMorphology::radiusX() const 68 { 69 return m_radiusX; 70 } 71 72 bool FEMorphology::setRadiusX(float radiusX) 73 { 74 if (m_radiusX == radiusX) 75 return false; 76 m_radiusX = radiusX; 77 return true; 78 } 79 80 float FEMorphology::radiusY() const 81 { 82 return m_radiusY; 83 } 84 85 FloatRect FEMorphology::mapRect(const FloatRect& rect, bool) 86 { 87 FloatRect result = rect; 88 result.inflateX(filter()->applyHorizontalScale(m_radiusX)); 89 result.inflateY(filter()->applyVerticalScale(m_radiusY)); 90 return result; 91 } 92 93 bool FEMorphology::setRadiusY(float radiusY) 94 { 95 if (m_radiusY == radiusY) 96 return false; 97 m_radiusY = radiusY; 98 return true; 99 } 100 101 void FEMorphology::applySoftware() 102 { 103 ImageBuffer* resultImage = createImageBufferResult(); 104 if (!resultImage) 105 return; 106 107 FilterEffect* in = inputEffect(0); 108 109 IntRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect()); 110 111 setIsAlphaImage(in->isAlphaImage()); 112 113 float radiusX = filter()->applyHorizontalScale(m_radiusX); 114 float radiusY = filter()->applyVerticalScale(m_radiusY); 115 116 RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore); 117 118 SkPaint paint; 119 GraphicsContext* dstContext = resultImage->context(); 120 if (m_type == FEMORPHOLOGY_OPERATOR_DILATE) 121 paint.setImageFilter(SkDilateImageFilter::Create(radiusX, radiusY))->unref(); 122 else if (m_type == FEMORPHOLOGY_OPERATOR_ERODE) 123 paint.setImageFilter(SkErodeImageFilter::Create(radiusX, radiusY))->unref(); 124 125 SkRect bounds = SkRect::MakeWH(absolutePaintRect().width(), absolutePaintRect().height()); 126 dstContext->saveLayer(&bounds, &paint); 127 dstContext->drawImage(image.get(), drawingRegion.location(), CompositeCopy); 128 dstContext->restoreLayer(); 129 } 130 131 PassRefPtr<SkImageFilter> FEMorphology::createImageFilter(SkiaImageFilterBuilder* builder) 132 { 133 RefPtr<SkImageFilter> input(builder->build(inputEffect(0), operatingColorSpace())); 134 SkScalar radiusX = SkFloatToScalar(filter()->applyHorizontalScale(m_radiusX)); 135 SkScalar radiusY = SkFloatToScalar(filter()->applyVerticalScale(m_radiusY)); 136 SkImageFilter::CropRect rect = getCropRect(builder->cropOffset()); 137 if (m_type == FEMORPHOLOGY_OPERATOR_DILATE) 138 return adoptRef(SkDilateImageFilter::Create(radiusX, radiusY, input.get(), &rect)); 139 return adoptRef(SkErodeImageFilter::Create(radiusX, radiusY, input.get(), &rect)); 140 } 141 142 static TextStream& operator<<(TextStream& ts, const MorphologyOperatorType& type) 143 { 144 switch (type) { 145 case FEMORPHOLOGY_OPERATOR_UNKNOWN: 146 ts << "UNKNOWN"; 147 break; 148 case FEMORPHOLOGY_OPERATOR_ERODE: 149 ts << "ERODE"; 150 break; 151 case FEMORPHOLOGY_OPERATOR_DILATE: 152 ts << "DILATE"; 153 break; 154 } 155 return ts; 156 } 157 158 TextStream& FEMorphology::externalRepresentation(TextStream& ts, int indent) const 159 { 160 writeIndent(ts, indent); 161 ts << "[feMorphology"; 162 FilterEffect::externalRepresentation(ts); 163 ts << " operator=\"" << morphologyOperator() << "\" " 164 << "radius=\"" << radiusX() << ", " << radiusY() << "\"]\n"; 165 inputEffect(0)->externalRepresentation(ts, indent + 1); 166 return ts; 167 } 168 169 } // namespace WebCore 170
