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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>
*
* 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"
#if ENABLE(SVG) && ENABLE(FILTERS)
#include "SVGFEImageElement.h"
#include "Attr.h"
#include "CachedImage.h"
#include "DocLoader.h"
#include "Document.h"
#include "RenderObject.h"
#include "RenderSVGResource.h"
#include "SVGLength.h"
#include "SVGNames.h"
#include "SVGPreserveAspectRatio.h"
#include "SVGRenderSupport.h"
namespace WebCore {
SVGFEImageElement::SVGFEImageElement(const QualifiedName& tagName, Document* doc)
: SVGFilterPrimitiveStandardAttributes(tagName, doc)
, SVGURIReference()
, SVGLangSpace()
, SVGExternalResourcesRequired()
{
}
SVGFEImageElement::~SVGFEImageElement()
{
if (m_cachedImage)
m_cachedImage->removeClient(this);
}
void SVGFEImageElement::requestImageResource()
{
if (m_cachedImage) {
m_cachedImage->removeClient(this);
m_cachedImage = 0;
}
Element* hrefElement = document()->getElementById(SVGURIReference::getTarget(href()));
if (hrefElement && hrefElement->isSVGElement() && hrefElement->renderer())
return;
m_cachedImage = ownerDocument()->docLoader()->requestImage(href());
if (m_cachedImage)
m_cachedImage->addClient(this);
}
void SVGFEImageElement::parseMappedAttribute(Attribute* attr)
{
const String& value = attr->value();
if (attr->name() == SVGNames::preserveAspectRatioAttr)
SVGPreserveAspectRatio::parsePreserveAspectRatio(this, value);
else {
if (SVGURIReference::parseMappedAttribute(attr)) {
requestImageResource();
return;
}
if (SVGLangSpace::parseMappedAttribute(attr))
return;
if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
return;
SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
}
}
void SVGFEImageElement::synchronizeProperty(const QualifiedName& attrName)
{
SVGFilterPrimitiveStandardAttributes::synchronizeProperty(attrName);
if (attrName == anyQName()) {
synchronizePreserveAspectRatio();
synchronizeHref();
synchronizeExternalResourcesRequired();
return;
}
if (attrName == SVGNames::preserveAspectRatioAttr)
synchronizePreserveAspectRatio();
else if (SVGURIReference::isKnownAttribute(attrName))
synchronizeHref();
else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))
synchronizeExternalResourcesRequired();
}
void SVGFEImageElement::notifyFinished(CachedResource*)
{
if (!inDocument())
return;
Element* parent = parentElement();
ASSERT(parent);
if (!parent->hasTagName(SVGNames::filterTag) || !parent->renderer())
return;
RenderSVGResource::markForLayoutAndParentResourceInvalidation(parent->renderer());
}
PassRefPtr<FilterEffect> SVGFEImageElement::build(SVGFilterBuilder*)
{
if (!m_cachedImage && !m_targetImage) {
Element* hrefElement = document()->getElementById(SVGURIReference::getTarget(href()));
if (!hrefElement || !hrefElement->isSVGElement())
return 0;
RenderObject* renderer = hrefElement->renderer();
if (!renderer)
return 0;
IntRect targetRect = enclosingIntRect(renderer->objectBoundingBox());
m_targetImage = ImageBuffer::create(targetRect.size(), LinearRGB);
SVGRenderSupport::renderSubtreeToImage(m_targetImage.get(), renderer);
}
return FEImage::create(m_targetImage ? m_targetImage->copyImage() : m_cachedImage->image(), preserveAspectRatio());
}
void SVGFEImageElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
{
SVGFilterPrimitiveStandardAttributes::addSubresourceAttributeURLs(urls);
addSubresourceURL(urls, document()->completeURL(href()));
}
}
#endif // ENABLE(SVG)
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