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/*
* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.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 "SVGFEMergeElement.h"
#include "ElementIterator.h"
#include "FilterEffect.h"
#include "SVGFEMergeNodeElement.h"
#include "SVGFilterBuilder.h"
#include "SVGNames.h"
namespace WebCore {
inline SVGFEMergeElement::SVGFEMergeElement(const QualifiedName& tagName, Document& document)
: SVGFilterPrimitiveStandardAttributes(tagName, document)
{
ASSERT(hasTagName(SVGNames::feMergeTag));
}
Ref<SVGFEMergeElement> SVGFEMergeElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGFEMergeElement(tagName, document));
}
RefPtr<FilterEffect> SVGFEMergeElement::build(SVGFilterBuilder* filterBuilder, Filter& filter)
{
RefPtr<FilterEffect> effect = FEMerge::create(filter);
FilterEffectVector& mergeInputs = effect->inputEffects();
for (auto& mergeNode : childrenOfType<SVGFEMergeNodeElement>(*this)) {
FilterEffect* mergeEffect = filterBuilder->getEffectById(mergeNode.in1());
if (!mergeEffect)
return nullptr;
mergeInputs.append(mergeEffect);
}
if (mergeInputs.isEmpty())
return nullptr;
return effect;
}
}
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