| /* |
| * 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) 2010 Dirk Schulze <krit@webkit.org> |
| * |
| * 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 "SVGFEImage.h" |
| |
| #include "AffineTransform.h" |
| #include "Filter.h" |
| #include "GraphicsContext.h" |
| #include "RenderElement.h" |
| #include "RenderTreeAsText.h" |
| #include "SVGElement.h" |
| #include "SVGRenderingContext.h" |
| #include "SVGURIReference.h" |
| #include <wtf/text/TextStream.h> |
| |
| namespace WebCore { |
| |
| FEImage::FEImage(Filter& filter, RefPtr<Image> image, const SVGPreserveAspectRatioValue& preserveAspectRatio) |
| : FilterEffect(filter) |
| , m_image(image) |
| , m_preserveAspectRatio(preserveAspectRatio) |
| { |
| } |
| |
| FEImage::FEImage(Filter& filter, TreeScope& treeScope, const String& href, const SVGPreserveAspectRatioValue& preserveAspectRatio) |
| : FilterEffect(filter) |
| , m_treeScope(&treeScope) |
| , m_href(href) |
| , m_preserveAspectRatio(preserveAspectRatio) |
| { |
| } |
| |
| Ref<FEImage> FEImage::createWithImage(Filter& filter, RefPtr<Image> image, const SVGPreserveAspectRatioValue& preserveAspectRatio) |
| { |
| return adoptRef(*new FEImage(filter, image, preserveAspectRatio)); |
| } |
| |
| Ref<FEImage> FEImage::createWithIRIReference(Filter& filter, TreeScope& treeScope, const String& href, const SVGPreserveAspectRatioValue& preserveAspectRatio) |
| { |
| return adoptRef(*new FEImage(filter, treeScope, href, preserveAspectRatio)); |
| } |
| |
| void FEImage::determineAbsolutePaintRect() |
| { |
| FloatRect paintRect = filter().absoluteTransform().mapRect(filterPrimitiveSubregion()); |
| FloatRect srcRect; |
| if (m_image) { |
| srcRect.setSize(m_image->size()); |
| m_preserveAspectRatio.transformRect(paintRect, srcRect); |
| } else if (RenderElement* renderer = referencedRenderer()) |
| srcRect = filter().absoluteTransform().mapRect(renderer->repaintRectInLocalCoordinates()); |
| |
| if (clipsToBounds()) |
| paintRect.intersect(maxEffectRect()); |
| else |
| paintRect.unite(maxEffectRect()); |
| setAbsolutePaintRect(enclosingIntRect(paintRect)); |
| } |
| |
| RenderElement* FEImage::referencedRenderer() const |
| { |
| if (!m_treeScope) |
| return nullptr; |
| auto target = SVGURIReference::targetElementFromIRIString(m_href, *m_treeScope); |
| if (!is<SVGElement>(target.element)) |
| return nullptr; |
| return target.element->renderer(); |
| } |
| |
| void FEImage::platformApplySoftware() |
| { |
| RenderElement* renderer = referencedRenderer(); |
| if (!m_image && !renderer) |
| return; |
| |
| // FEImage results are always in ColorSpaceSRGB |
| setResultColorSpace(ColorSpaceSRGB); |
| |
| ImageBuffer* resultImage = createImageBufferResult(); |
| if (!resultImage) |
| return; |
| |
| FloatRect destRect = filter().absoluteTransform().mapRect(filterPrimitiveSubregion()); |
| |
| FloatRect srcRect; |
| if (renderer) |
| srcRect = filter().absoluteTransform().mapRect(renderer->repaintRectInLocalCoordinates()); |
| else { |
| srcRect = FloatRect(FloatPoint(), m_image->size()); |
| m_preserveAspectRatio.transformRect(destRect, srcRect); |
| } |
| |
| IntPoint paintLocation = absolutePaintRect().location(); |
| destRect.move(-paintLocation.x(), -paintLocation.y()); |
| |
| if (renderer) { |
| const AffineTransform& absoluteTransform = filter().absoluteTransform(); |
| resultImage->context().concatCTM(absoluteTransform); |
| |
| auto contextNode = makeRefPtr(downcast<SVGElement>(renderer->element())); |
| if (contextNode->hasRelativeLengths()) { |
| SVGLengthContext lengthContext(contextNode.get()); |
| FloatSize viewportSize; |
| |
| // If we're referencing an element with percentage units, eg. <rect with="30%"> those values were resolved against the viewport. |
| // Build up a transformation that maps from the viewport space to the filter primitive subregion. |
| if (lengthContext.determineViewport(viewportSize)) |
| resultImage->context().concatCTM(makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), destRect)); |
| } |
| |
| AffineTransform contentTransformation; |
| SVGRenderingContext::renderSubtreeToImageBuffer(resultImage, *renderer, contentTransformation); |
| return; |
| } |
| |
| resultImage->context().drawImage(*m_image, destRect, srcRect); |
| } |
| |
| TextStream& FEImage::externalRepresentation(TextStream& ts, RepresentationType representation) const |
| { |
| FloatSize imageSize; |
| if (m_image) |
| imageSize = m_image->size(); |
| else if (RenderObject* renderer = referencedRenderer()) |
| imageSize = enclosingIntRect(renderer->repaintRectInLocalCoordinates()).size(); |
| ts << indent << "[feImage"; |
| FilterEffect::externalRepresentation(ts, representation); |
| ts << " image-size=\"" << imageSize.width() << "x" << imageSize.height() << "\"]\n"; |
| // FIXME: should this dump also object returned by SVGFEImage::image() ? |
| return ts; |
| } |
| |
| } // namespace WebCore |