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 32namespace blink { 33 34FEMerge::FEMerge(Filter* filter) 35 : FilterEffect(filter) 36{ 37} 38 39PassRefPtr<FEMerge> FEMerge::create(Filter* filter) 40{ 41 return adoptRef(new FEMerge(filter)); 42} 43 44void 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 60PassRefPtr<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 74TextStream& 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