| /* |
| * 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> |
| * 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/svg/graphics/filters/SVGFEImage.h" |
| |
| #include "SkBitmapSource.h" |
| #include "SkPictureImageFilter.h" |
| #include "core/rendering/RenderObject.h" |
| #include "core/rendering/svg/SVGRenderingContext.h" |
| #include "core/svg/SVGElement.h" |
| #include "core/svg/SVGURIReference.h" |
| #include "platform/graphics/DisplayList.h" |
| #include "platform/graphics/GraphicsContext.h" |
| #include "platform/graphics/filters/Filter.h" |
| #include "platform/graphics/filters/SkiaImageFilterBuilder.h" |
| #include "platform/text/TextStream.h" |
| #include "platform/transforms/AffineTransform.h" |
| |
| namespace WebCore { |
| |
| FEImage::FEImage(Filter* filter, PassRefPtr<Image> image, PassRefPtr<SVGPreserveAspectRatio> preserveAspectRatio) |
| : FilterEffect(filter) |
| , m_image(image) |
| , m_document(0) |
| , m_preserveAspectRatio(preserveAspectRatio) |
| { |
| } |
| |
| FEImage::FEImage(Filter* filter, Document& document, const String& href, PassRefPtr<SVGPreserveAspectRatio> preserveAspectRatio) |
| : FilterEffect(filter) |
| , m_document(&document) |
| , m_href(href) |
| , m_preserveAspectRatio(preserveAspectRatio) |
| { |
| } |
| |
| PassRefPtr<FEImage> FEImage::createWithImage(Filter* filter, PassRefPtr<Image> image, PassRefPtr<SVGPreserveAspectRatio> preserveAspectRatio) |
| { |
| return adoptRef(new FEImage(filter, image, preserveAspectRatio)); |
| } |
| |
| PassRefPtr<FEImage> FEImage::createWithIRIReference(Filter* filter, Document& document, const String& href, PassRefPtr<SVGPreserveAspectRatio> preserveAspectRatio) |
| { |
| return adoptRef(new FEImage(filter, document, href, preserveAspectRatio)); |
| } |
| |
| static FloatRect getRendererRepaintRect(RenderObject* renderer) |
| { |
| return renderer->localToParentTransform().mapRect( |
| renderer->repaintRectInLocalCoordinates()); |
| } |
| |
| FloatRect FEImage::determineAbsolutePaintRect(const FloatRect& originalRequestedRect) |
| { |
| RenderObject* renderer = referencedRenderer(); |
| if (!m_image && !renderer) |
| return FloatRect(); |
| |
| FloatRect requestedRect = originalRequestedRect; |
| if (clipsToBounds()) |
| requestedRect.intersect(maxEffectRect()); |
| |
| FloatRect destRect = filter()->mapLocalRectToAbsoluteRect(filterPrimitiveSubregion()); |
| FloatRect srcRect; |
| if (renderer) { |
| srcRect = getRendererRepaintRect(renderer); |
| SVGElement* contextNode = toSVGElement(renderer->node()); |
| |
| if (contextNode->hasRelativeLengths()) { |
| // FIXME: This fixes relative lengths but breaks non-relative ones (see crbug/260709). |
| SVGLengthContext lengthContext(contextNode); |
| FloatSize viewportSize; |
| if (lengthContext.determineViewport(viewportSize)) { |
| srcRect = makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), destRect).mapRect(srcRect); |
| } |
| } else { |
| srcRect = filter()->mapLocalRectToAbsoluteRect(srcRect); |
| srcRect.move(destRect.x(), destRect.y()); |
| } |
| destRect.intersect(srcRect); |
| } else { |
| srcRect = FloatRect(FloatPoint(), m_image->size()); |
| m_preserveAspectRatio->transformRect(destRect, srcRect); |
| } |
| |
| destRect.intersect(requestedRect); |
| addAbsolutePaintRect(destRect); |
| return destRect; |
| } |
| |
| RenderObject* FEImage::referencedRenderer() const |
| { |
| if (!m_document) |
| return 0; |
| Element* hrefElement = SVGURIReference::targetElementFromIRIString(m_href, *m_document); |
| if (!hrefElement || !hrefElement->isSVGElement()) |
| return 0; |
| return hrefElement->renderer(); |
| } |
| |
| void FEImage::applySoftware() |
| { |
| RenderObject* renderer = referencedRenderer(); |
| if (!m_image && !renderer) |
| return; |
| |
| ImageBuffer* resultImage = createImageBufferResult(); |
| if (!resultImage) |
| return; |
| IntPoint paintLocation = absolutePaintRect().location(); |
| resultImage->context()->translate(-paintLocation.x(), -paintLocation.y()); |
| |
| // FEImage results are always in ColorSpaceDeviceRGB |
| setResultColorSpace(ColorSpaceDeviceRGB); |
| |
| FloatRect destRect = filter()->mapLocalRectToAbsoluteRect(filterPrimitiveSubregion()); |
| FloatRect srcRect; |
| |
| if (!renderer) { |
| srcRect = FloatRect(FloatPoint(), m_image->size()); |
| m_preserveAspectRatio->transformRect(destRect, srcRect); |
| |
| resultImage->context()->drawImage(m_image.get(), destRect, srcRect); |
| return; |
| } |
| |
| SVGElement* contextNode = toSVGElement(renderer->node()); |
| if (contextNode->hasRelativeLengths()) { |
| // FIXME: This fixes relative lengths but breaks non-relative ones (see crbug/260709). |
| SVGLengthContext lengthContext(contextNode); |
| 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)); |
| } else { |
| resultImage->context()->translate(destRect.x(), destRect.y()); |
| resultImage->context()->concatCTM(filter()->absoluteTransform()); |
| } |
| |
| AffineTransform contentTransformation; |
| SVGRenderingContext::renderSubtree(resultImage->context(), renderer, contentTransformation); |
| } |
| |
| TextStream& FEImage::externalRepresentation(TextStream& ts, int indent) const |
| { |
| IntSize imageSize; |
| if (m_image) |
| imageSize = m_image->size(); |
| else if (RenderObject* renderer = referencedRenderer()) |
| imageSize = enclosingIntRect(getRendererRepaintRect(renderer)).size(); |
| writeIndent(ts, indent); |
| ts << "[feImage"; |
| FilterEffect::externalRepresentation(ts); |
| ts << " image-size=\"" << imageSize.width() << "x" << imageSize.height() << "\"]\n"; |
| // FIXME: should this dump also object returned by SVGFEImage::image() ? |
| return ts; |
| } |
| |
| PassRefPtr<SkImageFilter> FEImage::createImageFilterForRenderer(RenderObject* renderer, SkiaImageFilterBuilder* builder) |
| { |
| FloatRect dstRect = filterPrimitiveSubregion(); |
| |
| AffineTransform transform; |
| SVGElement* contextNode = toSVGElement(renderer->node()); |
| |
| if (contextNode->hasRelativeLengths()) { |
| SVGLengthContext lengthContext(contextNode); |
| 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)) |
| transform = makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), dstRect); |
| } else { |
| transform.translate(dstRect.x(), dstRect.y()); |
| } |
| |
| GraphicsContext* context = builder->context(); |
| if (!context) |
| return adoptRef(new SkBitmapSource(SkBitmap())); |
| AffineTransform contentTransformation; |
| context->save(); |
| context->beginRecording(FloatRect(FloatPoint(), dstRect.size())); |
| context->concatCTM(transform); |
| SVGRenderingContext::renderSubtree(context, renderer, contentTransformation); |
| RefPtr<DisplayList> displayList = context->endRecording(); |
| context->restore(); |
| RefPtr<SkImageFilter> result = adoptRef(new SkPictureImageFilter(displayList->picture(), dstRect)); |
| return result.release(); |
| } |
| |
| PassRefPtr<SkImageFilter> FEImage::createImageFilter(SkiaImageFilterBuilder* builder) |
| { |
| RenderObject* renderer = referencedRenderer(); |
| if (!m_image && !renderer) |
| return adoptRef(new SkBitmapSource(SkBitmap())); |
| |
| setOperatingColorSpace(ColorSpaceDeviceRGB); |
| |
| if (renderer) |
| return createImageFilterForRenderer(renderer, builder); |
| |
| FloatRect srcRect = FloatRect(FloatPoint(), m_image->size()); |
| FloatRect dstRect = filterPrimitiveSubregion(); |
| |
| // FIXME: CSS image filters currently do not seem to set filter primitive |
| // subregion correctly if unspecified. So default to srcRect size if so. |
| if (dstRect.isEmpty()) |
| dstRect = srcRect; |
| |
| m_preserveAspectRatio->transformRect(dstRect, srcRect); |
| |
| if (!m_image->nativeImageForCurrentFrame()) |
| return adoptRef(new SkBitmapSource(SkBitmap())); |
| |
| RefPtr<SkImageFilter> result = adoptRef(new SkBitmapSource(m_image->nativeImageForCurrentFrame()->bitmap(), srcRect, dstRect)); |
| return result.release(); |
| } |
| |
| } // namespace WebCore |