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/*
* Copyright (C) Research In Motion Limited 2011. 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 "core/svg/SVGFEDropShadowElement.h"
#include "core/SVGNames.h"
#include "core/layout/LayoutObject.h"
#include "core/style/ComputedStyle.h"
#include "core/style/SVGComputedStyle.h"
#include "core/svg/graphics/filters/SVGFilterBuilder.h"
#include "platform/graphics/filters/FEDropShadow.h"
namespace blink {
inline SVGFEDropShadowElement::SVGFEDropShadowElement(Document& document)
: SVGFilterPrimitiveStandardAttributes(SVGNames::feDropShadowTag, document),
m_dx(SVGAnimatedNumber::create(this,
SVGNames::dxAttr,
SVGNumber::create(2))),
m_dy(SVGAnimatedNumber::create(this,
SVGNames::dyAttr,
SVGNumber::create(2))),
m_stdDeviation(
SVGAnimatedNumberOptionalNumber::create(this,
SVGNames::stdDeviationAttr,
2,
2)),
m_in1(SVGAnimatedString::create(this, SVGNames::inAttr)) {
addToPropertyMap(m_dx);
addToPropertyMap(m_dy);
addToPropertyMap(m_stdDeviation);
addToPropertyMap(m_in1);
}
DEFINE_TRACE(SVGFEDropShadowElement) {
visitor->trace(m_dx);
visitor->trace(m_dy);
visitor->trace(m_stdDeviation);
visitor->trace(m_in1);
SVGFilterPrimitiveStandardAttributes::trace(visitor);
}
DEFINE_NODE_FACTORY(SVGFEDropShadowElement)
void SVGFEDropShadowElement::setStdDeviation(float x, float y) {
stdDeviationX()->baseValue()->setValue(x);
stdDeviationY()->baseValue()->setValue(y);
invalidate();
}
bool SVGFEDropShadowElement::setFilterEffectAttribute(
FilterEffect* effect,
const QualifiedName& attrName) {
DCHECK(layoutObject());
FEDropShadow* dropShadow = static_cast<FEDropShadow*>(effect);
const SVGComputedStyle& svgStyle = layoutObject()->styleRef().svgStyle();
if (attrName == SVGNames::flood_colorAttr) {
dropShadow->setShadowColor(svgStyle.floodColor());
return true;
}
if (attrName == SVGNames::flood_opacityAttr) {
dropShadow->setShadowOpacity(svgStyle.floodOpacity());
return true;
}
return SVGFilterPrimitiveStandardAttributes::setFilterEffectAttribute(
effect, attrName);
}
void SVGFEDropShadowElement::svgAttributeChanged(
const QualifiedName& attrName) {
if (attrName == SVGNames::inAttr || attrName == SVGNames::stdDeviationAttr ||
attrName == SVGNames::dxAttr || attrName == SVGNames::dyAttr) {
SVGElement::InvalidationGuard invalidationGuard(this);
invalidate();
return;
}
SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
}
FilterEffect* SVGFEDropShadowElement::build(SVGFilterBuilder* filterBuilder,
Filter* filter) {
LayoutObject* layoutObject = this->layoutObject();
if (!layoutObject)
return nullptr;
ASSERT(layoutObject->style());
const SVGComputedStyle& svgStyle = layoutObject->style()->svgStyle();
Color color = svgStyle.floodColor();
float opacity = svgStyle.floodOpacity();
FilterEffect* input1 = filterBuilder->getEffectById(
AtomicString(m_in1->currentValue()->value()));
ASSERT(input1);
// Clamp std.dev. to non-negative. (See SVGFEGaussianBlurElement::build)
float stdDevX = std::max(0.0f, stdDeviationX()->currentValue()->value());
float stdDevY = std::max(0.0f, stdDeviationY()->currentValue()->value());
FilterEffect* effect = FEDropShadow::create(
filter, stdDevX, stdDevY, m_dx->currentValue()->value(),
m_dy->currentValue()->value(), color, opacity);
effect->inputEffects().push_back(input1);
return effect;
}
} // namespace blink
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