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) 2013 Google Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23 #include "config.h"
24 #include "platform/graphics/filters/FEMerge.h"
25
26 #include "SkMergeImageFilter.h"
27 #include "platform/graphics/GraphicsContext.h"
28 #include "platform/graphics/filters/SkiaImageFilterBuilder.h"
29 #include "platform/text/TextStream.h"
30 #include "wtf/OwnPtr.h"
31
32 namespace blink {
33
FEMerge(Filter * filter)34 FEMerge::FEMerge(Filter* filter)
35 : FilterEffect(filter)
36 {
37 }
38
create(Filter * filter)39 PassRefPtr<FEMerge> FEMerge::create(Filter* filter)
40 {
41 return adoptRef(new FEMerge(filter));
42 }
43
applySoftware()44 void FEMerge::applySoftware()
45 {
46 unsigned size = numberOfEffectInputs();
47 ASSERT(size > 0);
48
49 ImageBuffer* resultImage = createImageBufferResult();
50 if (!resultImage)
51 return;
52
53 GraphicsContext* filterContext = resultImage->context();
54 for (unsigned i = 0; i < size; ++i) {
55 FilterEffect* in = inputEffect(i);
56 filterContext->drawImageBuffer(in->asImageBuffer(), drawingRegionOfInputImage(in->absolutePaintRect()));
57 }
58 }
59
createImageFilter(SkiaImageFilterBuilder * builder)60 PassRefPtr<SkImageFilter> FEMerge::createImageFilter(SkiaImageFilterBuilder* builder)
61 {
62 unsigned size = numberOfEffectInputs();
63
64 OwnPtr<RefPtr<SkImageFilter>[]> inputRefs = adoptArrayPtr(new RefPtr<SkImageFilter>[size]);
65 OwnPtr<SkImageFilter*[]> inputs = adoptArrayPtr(new SkImageFilter*[size]);
66 for (unsigned i = 0; i < size; ++i) {
67 inputRefs[i] = builder->build(inputEffect(i), operatingColorSpace());
68 inputs[i] = inputRefs[i].get();
69 }
70 SkImageFilter::CropRect rect = getCropRect(builder->cropOffset());
71 return adoptRef(SkMergeImageFilter::Create(inputs.get(), size, 0, &rect));
72 }
73
externalRepresentation(TextStream & ts,int indent) const74 TextStream& FEMerge::externalRepresentation(TextStream& ts, int indent) const
75 {
76 writeIndent(ts, indent);
77 ts << "[feMerge";
78 FilterEffect::externalRepresentation(ts);
79 unsigned size = numberOfEffectInputs();
80 ASSERT(size > 0);
81 ts << " mergeNodes=\"" << size << "\"]\n";
82 for (unsigned i = 0; i < size; ++i)
83 inputEffect(i)->externalRepresentation(ts, indent + 1);
84 return ts;
85 }
86
87 } // namespace blink
88