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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 "core/svg/SVGFEGaussianBlurElement.h"
#include "core/SVGNames.h"
#include "core/svg/graphics/filters/SVGFilterBuilder.h"
#include "platform/graphics/filters/FEGaussianBlur.h"
namespace blink {
inline SVGFEGaussianBlurElement::SVGFEGaussianBlurElement(Document& document)
: SVGFilterPrimitiveStandardAttributes(SVGNames::feGaussianBlurTag,
document),
m_stdDeviation(
SVGAnimatedNumberOptionalNumber::create(this,
SVGNames::stdDeviationAttr,
0,
0)),
m_in1(SVGAnimatedString::create(this, SVGNames::inAttr)) {
addToPropertyMap(m_stdDeviation);
addToPropertyMap(m_in1);
}
DEFINE_TRACE(SVGFEGaussianBlurElement) {
visitor->trace(m_stdDeviation);
visitor->trace(m_in1);
SVGFilterPrimitiveStandardAttributes::trace(visitor);
}
DEFINE_NODE_FACTORY(SVGFEGaussianBlurElement)
void SVGFEGaussianBlurElement::setStdDeviation(float x, float y) {
stdDeviationX()->baseValue()->setValue(x);
stdDeviationY()->baseValue()->setValue(y);
invalidate();
}
void SVGFEGaussianBlurElement::svgAttributeChanged(
const QualifiedName& attrName) {
if (attrName == SVGNames::inAttr || attrName == SVGNames::stdDeviationAttr) {
SVGElement::InvalidationGuard invalidationGuard(this);
invalidate();
return;
}
SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
}
FilterEffect* SVGFEGaussianBlurElement::build(SVGFilterBuilder* filterBuilder,
Filter* filter) {
FilterEffect* input1 = filterBuilder->getEffectById(
AtomicString(m_in1->currentValue()->value()));
ASSERT(input1);
// "A negative value or a value of zero disables the effect of the given
// filter primitive (i.e., the result is the filter input image)."
// (https://drafts.fxtf.org/filters/#element-attrdef-fegaussianblur-stddeviation)
//
// => Clamp to non-negative.
float stdDevX = std::max(0.0f, stdDeviationX()->currentValue()->value());
float stdDevY = std::max(0.0f, stdDeviationY()->currentValue()->value());
FilterEffect* effect = FEGaussianBlur::create(filter, stdDevX, stdDevY);
effect->inputEffects().push_back(input1);
return effect;
}
} // namespace blink
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