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/*
* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
* Copyright (C) 2010 Dirk Schulze <krit@webkit.org>
* Copyright (C) 2018-2021 Apple 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 "SVGFEImageElement.h"
#include "CachedImage.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "Document.h"
#include "Image.h"
#include "RenderObject.h"
#include "RenderSVGResource.h"
#include "SVGElementInlines.h"
#include "SVGNames.h"
#include "SVGPreserveAspectRatioValue.h"
#include "SVGRenderingContext.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SVGFEImageElement);
inline SVGFEImageElement::SVGFEImageElement(const QualifiedName& tagName, Document& document)
: SVGFilterPrimitiveStandardAttributes(tagName, document)
, SVGURIReference(this)
{
ASSERT(hasTagName(SVGNames::feImageTag));
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::preserveAspectRatioAttr, &SVGFEImageElement::m_preserveAspectRatio>();
});
}
Ref<SVGFEImageElement> SVGFEImageElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGFEImageElement(tagName, document));
}
SVGFEImageElement::~SVGFEImageElement()
{
clearResourceReferences();
}
bool SVGFEImageElement::hasSingleSecurityOrigin() const
{
if (!m_cachedImage)
return true;
auto* image = m_cachedImage->image();
return !image || image->hasSingleSecurityOrigin();
}
void SVGFEImageElement::clearResourceReferences()
{
if (m_cachedImage) {
m_cachedImage->removeClient(*this);
m_cachedImage = nullptr;
}
removeElementReference();
}
void SVGFEImageElement::requestImageResource()
{
ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
options.contentSecurityPolicyImposition = isInUserAgentShadowTree() ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck;
CachedResourceRequest request(ResourceRequest(document().completeURL(href())), options);
request.setInitiator(*this);
m_cachedImage = document().cachedResourceLoader().requestImage(WTFMove(request)).value_or(nullptr);
if (m_cachedImage)
m_cachedImage->addClient(*this);
}
void SVGFEImageElement::buildPendingResource()
{
clearResourceReferences();
if (!isConnected())
return;
auto target = SVGURIReference::targetElementFromIRIString(href(), treeScope());
if (!target.element) {
if (target.identifier.isEmpty())
requestImageResource();
else {
document().accessSVGExtensions().addPendingResource(target.identifier, *this);
ASSERT(hasPendingResources());
}
} else if (is<SVGElement>(*target.element))
downcast<SVGElement>(*target.element).addReferencingElement(*this);
invalidate();
}
void SVGFEImageElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == SVGNames::preserveAspectRatioAttr) {
m_preserveAspectRatio->setBaseValInternal(SVGPreserveAspectRatioValue { value });
return;
}
SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
SVGURIReference::parseAttribute(name, value);
}
void SVGFEImageElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (attrName == SVGNames::preserveAspectRatioAttr) {
InstanceInvalidationGuard guard(*this);
invalidate();
return;
}
if (SVGURIReference::isKnownAttribute(attrName)) {
InstanceInvalidationGuard guard(*this);
buildPendingResource();
return;
}
SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
}
Node::InsertedIntoAncestorResult SVGFEImageElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
SVGFilterPrimitiveStandardAttributes::insertedIntoAncestor(insertionType, parentOfInsertedTree);
return InsertedIntoAncestorResult::NeedsPostInsertionCallback;
}
void SVGFEImageElement::didFinishInsertingNode()
{
buildPendingResource();
}
void SVGFEImageElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
SVGFilterPrimitiveStandardAttributes::removedFromAncestor(removalType, oldParentOfRemovedTree);
if (removalType.disconnectedFromDocument)
clearResourceReferences();
}
void SVGFEImageElement::notifyFinished(CachedResource&, const NetworkLoadMetrics&)
{
if (!isConnected())
return;
RefPtr parent = parentElement();
if (!parent || !parent->hasTagName(SVGNames::filterTag))
return;
RenderElement* parentRenderer = parent->renderer();
if (!parentRenderer)
return;
RenderSVGResource::markForLayoutAndParentResourceInvalidation(*parentRenderer);
}
std::tuple<RefPtr<ImageBuffer>, FloatRect> SVGFEImageElement::imageBufferForEffect() const
{
auto target = SVGURIReference::targetElementFromIRIString(href(), treeScope());
if (!is<SVGElement>(target.element))
return { };
if (isDescendantOrShadowDescendantOf(target.element.get()))
return { };
auto contextNode = static_pointer_cast<SVGElement>(target.element);
auto renderer = contextNode->renderer();
if (!renderer)
return { };
auto absoluteTransform = SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(*renderer);
if (!absoluteTransform.isInvertible())
return { };
auto shearFreeAbsoluteTransform = AffineTransform(absoluteTransform.xScale(), 0, 0, absoluteTransform.yScale(), 0, 0);
auto imageRect = renderer->repaintRectInLocalCoordinates();
auto imageBuffer = SVGRenderingContext::createImageBuffer(imageRect, shearFreeAbsoluteTransform, DestinationColorSpace::SRGB(), RenderingMode::Unaccelerated);
if (!imageBuffer)
return { };
auto& context = imageBuffer->context();
SVGRenderingContext::renderSubtreeToContext(context, *renderer, AffineTransform());
return { imageBuffer, imageRect };
}
RefPtr<FilterEffect> SVGFEImageElement::build(SVGFilterBuilder&) const
{
if (m_cachedImage)
return FEImage::create(Ref { *m_cachedImage->imageForRenderer(renderer()) }, preserveAspectRatio());
auto [imageBuffer, imageRect] = imageBufferForEffect();
if (!imageBuffer)
return nullptr;
return FEImage::create(imageBuffer.releaseNonNull(), imageRect, preserveAspectRatio());
}
void SVGFEImageElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
{
SVGFilterPrimitiveStandardAttributes::addSubresourceAttributeURLs(urls);
addSubresourceURL(urls, document().completeURL(href()));
}
}