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/FEOffset.h" 27 28 #include "SkFlattenableBuffers.h" 29 #include "SkOffsetImageFilter.h" 30 #include "platform/graphics/GraphicsContext.h" 31 #include "platform/graphics/filters/SkiaImageFilterBuilder.h" 32 #include "platform/text/TextStream.h" 33 #include "third_party/skia/include/core/SkDevice.h" 34 35 namespace WebCore { 36 37 FEOffset::FEOffset(Filter* filter, float dx, float dy) 38 : FilterEffect(filter) 39 , m_dx(dx) 40 , m_dy(dy) 41 { 42 } 43 44 PassRefPtr<FEOffset> FEOffset::create(Filter* filter, float dx, float dy) 45 { 46 return adoptRef(new FEOffset(filter, dx, dy)); 47 } 48 49 float FEOffset::dx() const 50 { 51 return m_dx; 52 } 53 54 void FEOffset::setDx(float dx) 55 { 56 m_dx = dx; 57 } 58 59 float FEOffset::dy() const 60 { 61 return m_dy; 62 } 63 64 void FEOffset::setDy(float dy) 65 { 66 m_dy = dy; 67 } 68 69 FloatRect FEOffset::mapRect(const FloatRect& rect, bool forward) 70 { 71 FloatRect result = rect; 72 if (forward) 73 result.move(filter()->applyHorizontalScale(m_dx), filter()->applyVerticalScale(m_dy)); 74 else 75 result.move(-filter()->applyHorizontalScale(m_dx), -filter()->applyVerticalScale(m_dy)); 76 return result; 77 } 78 79 void FEOffset::applySoftware() 80 { 81 FilterEffect* in = inputEffect(0); 82 83 ImageBuffer* resultImage = createImageBufferResult(); 84 if (!resultImage) 85 return; 86 87 setIsAlphaImage(in->isAlphaImage()); 88 89 FloatRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect()); 90 Filter* filter = this->filter(); 91 drawingRegion.move(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy)); 92 resultImage->context()->drawImageBuffer(in->asImageBuffer(), drawingRegion); 93 } 94 95 PassRefPtr<SkImageFilter> FEOffset::createImageFilter(SkiaImageFilterBuilder* builder) 96 { 97 RefPtr<SkImageFilter> input(builder->build(inputEffect(0), operatingColorSpace())); 98 Filter* filter = this->filter(); 99 SkImageFilter::CropRect cropRect = getCropRect(builder->cropOffset()); 100 return adoptRef(SkOffsetImageFilter::Create(SkFloatToScalar(filter->applyHorizontalScale(m_dx)), SkFloatToScalar(filter->applyVerticalScale(m_dy)), input.get(), &cropRect)); 101 } 102 103 TextStream& FEOffset::externalRepresentation(TextStream& ts, int indent) const 104 { 105 writeIndent(ts, indent); 106 ts << "[feOffset"; 107 FilterEffect::externalRepresentation(ts); 108 ts << " dx=\"" << dx() << "\" dy=\"" << dy() << "\"]\n"; 109 inputEffect(0)->externalRepresentation(ts, indent + 1); 110 return ts; 111 } 112 113 } // namespace WebCore 114
