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