| /* |
| * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org> |
| * Copyright (C) 2005 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| |
| #include "core/platform/graphics/filters/FEOffset.h" |
| |
| #include "SkFlattenableBuffers.h" |
| #include "SkImageFilter.h" |
| |
| #include "core/platform/graphics/GraphicsContext.h" |
| #include "core/platform/graphics/filters/Filter.h" |
| #include "core/platform/graphics/filters/SkiaImageFilterBuilder.h" |
| #include "core/platform/text/TextStream.h" |
| #include "core/rendering/RenderTreeAsText.h" |
| #include "third_party/skia/include/core/SkDevice.h" |
| |
| namespace WebCore { |
| |
| class OffsetImageFilter : public SkImageFilter { |
| public: |
| OffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input, const SkIRect* cropRect = 0) : SkImageFilter(input, cropRect), m_dx(dx), m_dy(dy) |
| { |
| } |
| |
| virtual bool onFilterImage(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm, SkBitmap* dst, SkIPoint* offset) |
| { |
| SkBitmap source = src; |
| SkImageFilter* input = getInput(0); |
| SkIPoint srcOffset = SkIPoint::Make(0, 0); |
| if (input && !input->filterImage(proxy, src, ctm, &source, &srcOffset)) |
| return false; |
| |
| SkIRect bounds; |
| source.getBounds(&bounds); |
| |
| if (!applyCropRect(&bounds, ctm)) { |
| return false; |
| } |
| |
| SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height())); |
| SkCanvas canvas(device); |
| SkPaint paint; |
| paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| canvas.drawBitmap(source, m_dx - bounds.left(), m_dy - bounds.top(), &paint); |
| *dst = device->accessBitmap(false); |
| offset->fX += bounds.left(); |
| offset->fY += bounds.top(); |
| return true; |
| } |
| |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(OffsetImageFilter) |
| |
| protected: |
| explicit OffsetImageFilter(SkFlattenableReadBuffer& buffer) |
| : SkImageFilter(buffer) |
| { |
| m_dx = buffer.readScalar(); |
| m_dy = buffer.readScalar(); |
| } |
| |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const |
| { |
| this->SkImageFilter::flatten(buffer); |
| buffer.writeScalar(m_dx); |
| buffer.writeScalar(m_dy); |
| } |
| |
| private: |
| SkScalar m_dx, m_dy; |
| }; |
| |
| FEOffset::FEOffset(Filter* filter, float dx, float dy) |
| : FilterEffect(filter) |
| , m_dx(dx) |
| , m_dy(dy) |
| { |
| } |
| |
| PassRefPtr<FEOffset> FEOffset::create(Filter* filter, float dx, float dy) |
| { |
| return adoptRef(new FEOffset(filter, dx, dy)); |
| } |
| |
| float FEOffset::dx() const |
| { |
| return m_dx; |
| } |
| |
| void FEOffset::setDx(float dx) |
| { |
| m_dx = dx; |
| } |
| |
| float FEOffset::dy() const |
| { |
| return m_dy; |
| } |
| |
| void FEOffset::setDy(float dy) |
| { |
| m_dy = dy; |
| } |
| |
| void FEOffset::determineAbsolutePaintRect() |
| { |
| FloatRect paintRect = inputEffect(0)->absolutePaintRect(); |
| Filter* filter = this->filter(); |
| paintRect.move(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy)); |
| if (clipsToBounds()) |
| paintRect.intersect(maxEffectRect()); |
| else |
| paintRect.unite(maxEffectRect()); |
| setAbsolutePaintRect(enclosingIntRect(paintRect)); |
| } |
| |
| FloatRect FEOffset::mapRect(const FloatRect& rect, bool forward) |
| { |
| FloatRect result = rect; |
| if (forward) |
| result.move(filter()->applyHorizontalScale(m_dx), filter()->applyHorizontalScale(m_dy)); |
| else |
| result.move(-filter()->applyHorizontalScale(m_dx), -filter()->applyHorizontalScale(m_dy)); |
| return result; |
| } |
| |
| void FEOffset::applySoftware() |
| { |
| FilterEffect* in = inputEffect(0); |
| |
| ImageBuffer* resultImage = createImageBufferResult(); |
| if (!resultImage) |
| return; |
| |
| setIsAlphaImage(in->isAlphaImage()); |
| |
| FloatRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect()); |
| Filter* filter = this->filter(); |
| drawingRegion.move(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy)); |
| resultImage->context()->drawImageBuffer(in->asImageBuffer(), drawingRegion); |
| } |
| |
| PassRefPtr<SkImageFilter> FEOffset::createImageFilter(SkiaImageFilterBuilder* builder) |
| { |
| RefPtr<SkImageFilter> input(builder->build(inputEffect(0), operatingColorSpace())); |
| Filter* filter = this->filter(); |
| SkIRect cropRect = getCropRect(builder->cropOffset()); |
| return adoptRef(new OffsetImageFilter(SkFloatToScalar(filter->applyHorizontalScale(m_dx)), SkFloatToScalar(filter->applyVerticalScale(m_dy)), input.get(), &cropRect)); |
| } |
| |
| TextStream& FEOffset::externalRepresentation(TextStream& ts, int indent) const |
| { |
| writeIndent(ts, indent); |
| ts << "[feOffset"; |
| FilterEffect::externalRepresentation(ts); |
| ts << " dx=\"" << dx() << "\" dy=\"" << dy() << "\"]\n"; |
| inputEffect(0)->externalRepresentation(ts, indent + 1); |
| return ts; |
| } |
| |
| } // namespace WebCore |