1 /*
2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
5 * Copyright (C) 2009 Dirk Schulze <krit@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
36 namespace blink {
37
FEMorphology(Filter * filter,MorphologyOperatorType type,float radiusX,float radiusY)38 FEMorphology::FEMorphology(Filter* filter, MorphologyOperatorType type, float radiusX, float radiusY)
39 : FilterEffect(filter)
40 , m_type(type)
41 , m_radiusX(radiusX)
42 , m_radiusY(radiusY)
43 {
44 }
45
create(Filter * filter,MorphologyOperatorType type,float radiusX,float radiusY)46 PassRefPtr<FEMorphology> FEMorphology::create(Filter* filter, MorphologyOperatorType type, float radiusX, float radiusY)
47 {
48 return adoptRef(new FEMorphology(filter, type, radiusX, radiusY));
49 }
50
morphologyOperator() const51 MorphologyOperatorType FEMorphology::morphologyOperator() const
52 {
53 return m_type;
54 }
55
setMorphologyOperator(MorphologyOperatorType type)56 bool FEMorphology::setMorphologyOperator(MorphologyOperatorType type)
57 {
58 if (m_type == type)
59 return false;
60 m_type = type;
61 return true;
62 }
63
radiusX() const64 float FEMorphology::radiusX() const
65 {
66 return m_radiusX;
67 }
68
setRadiusX(float radiusX)69 bool FEMorphology::setRadiusX(float radiusX)
70 {
71 if (m_radiusX == radiusX)
72 return false;
73 m_radiusX = radiusX;
74 return true;
75 }
76
radiusY() const77 float FEMorphology::radiusY() const
78 {
79 return m_radiusY;
80 }
81
mapRect(const FloatRect & rect,bool)82 FloatRect FEMorphology::mapRect(const FloatRect& rect, bool)
83 {
84 FloatRect result = rect;
85 result.inflateX(filter()->applyHorizontalScale(m_radiusX));
86 result.inflateY(filter()->applyVerticalScale(m_radiusY));
87 return result;
88 }
89
setRadiusY(float radiusY)90 bool FEMorphology::setRadiusY(float radiusY)
91 {
92 if (m_radiusY == radiusY)
93 return false;
94 m_radiusY = radiusY;
95 return true;
96 }
97
applySoftware()98 void FEMorphology::applySoftware()
99 {
100 ImageBuffer* resultImage = createImageBufferResult();
101 if (!resultImage)
102 return;
103
104 FilterEffect* in = inputEffect(0);
105
106 IntRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect());
107
108 setIsAlphaImage(in->isAlphaImage());
109
110 float radiusX = filter()->applyHorizontalScale(m_radiusX);
111 float radiusY = filter()->applyVerticalScale(m_radiusY);
112
113 RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);
114
115 SkPaint paint;
116 GraphicsContext* dstContext = resultImage->context();
117 if (m_type == FEMORPHOLOGY_OPERATOR_DILATE)
118 paint.setImageFilter(SkDilateImageFilter::Create(radiusX, radiusY))->unref();
119 else if (m_type == FEMORPHOLOGY_OPERATOR_ERODE)
120 paint.setImageFilter(SkErodeImageFilter::Create(radiusX, radiusY))->unref();
121
122 SkRect bounds = SkRect::MakeWH(absolutePaintRect().width(), absolutePaintRect().height());
123 dstContext->saveLayer(&bounds, &paint);
124 dstContext->drawImage(image.get(), drawingRegion.location(), CompositeCopy);
125 dstContext->restoreLayer();
126 }
127
createImageFilter(SkiaImageFilterBuilder * builder)128 PassRefPtr<SkImageFilter> FEMorphology::createImageFilter(SkiaImageFilterBuilder* builder)
129 {
130 RefPtr<SkImageFilter> input(builder->build(inputEffect(0), operatingColorSpace()));
131 SkScalar radiusX = SkFloatToScalar(filter()->applyHorizontalScale(m_radiusX));
132 SkScalar radiusY = SkFloatToScalar(filter()->applyVerticalScale(m_radiusY));
133 SkImageFilter::CropRect rect = getCropRect(builder->cropOffset());
134 if (m_type == FEMORPHOLOGY_OPERATOR_DILATE)
135 return adoptRef(SkDilateImageFilter::Create(radiusX, radiusY, input.get(), &rect));
136 return adoptRef(SkErodeImageFilter::Create(radiusX, radiusY, input.get(), &rect));
137 }
138
operator <<(TextStream & ts,const MorphologyOperatorType & type)139 static TextStream& operator<<(TextStream& ts, const MorphologyOperatorType& type)
140 {
141 switch (type) {
142 case FEMORPHOLOGY_OPERATOR_UNKNOWN:
143 ts << "UNKNOWN";
144 break;
145 case FEMORPHOLOGY_OPERATOR_ERODE:
146 ts << "ERODE";
147 break;
148 case FEMORPHOLOGY_OPERATOR_DILATE:
149 ts << "DILATE";
150 break;
151 }
152 return ts;
153 }
154
externalRepresentation(TextStream & ts,int indent) const155 TextStream& FEMorphology::externalRepresentation(TextStream& ts, int indent) const
156 {
157 writeIndent(ts, indent);
158 ts << "[feMorphology";
159 FilterEffect::externalRepresentation(ts);
160 ts << " operator=\"" << morphologyOperator() << "\" "
161 << "radius=\"" << radiusX() << ", " << radiusY() << "\"]\n";
162 inputEffect(0)->externalRepresentation(ts, indent + 1);
163 return ts;
164 }
165
166 } // namespace blink
167