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/*
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
* Copyright (C) 2018-2022 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 "SVGFEDropShadowElement.h"
#include "NodeName.h"
#include "RenderElement.h"
#include "RenderStyle.h"
#include "SVGFilter.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGRenderStyle.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(SVGFEDropShadowElement);
inline SVGFEDropShadowElement::SVGFEDropShadowElement(const QualifiedName& tagName, Document& document)
: SVGFilterPrimitiveStandardAttributes(tagName, document, makeUniqueRef<PropertyRegistry>(*this))
{
ASSERT(hasTagName(SVGNames::feDropShadowTag));
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::inAttr, &SVGFEDropShadowElement::m_in1>();
PropertyRegistry::registerProperty<SVGNames::dxAttr, &SVGFEDropShadowElement::m_dx>();
PropertyRegistry::registerProperty<SVGNames::dyAttr, &SVGFEDropShadowElement::m_dy>();
PropertyRegistry::registerProperty<SVGNames::stdDeviationAttr, &SVGFEDropShadowElement::m_stdDeviationX, &SVGFEDropShadowElement::m_stdDeviationY>();
});
}
Ref<SVGFEDropShadowElement> SVGFEDropShadowElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGFEDropShadowElement(tagName, document));
}
void SVGFEDropShadowElement::setStdDeviation(float x, float y)
{
Ref { m_stdDeviationX }->setBaseValInternal(x);
Ref { m_stdDeviationY }->setBaseValInternal(y);
updateSVGRendererForElementChange();
}
void SVGFEDropShadowElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
switch (name.nodeName()) {
case AttributeNames::stdDeviationAttr:
if (auto result = parseNumberOptionalNumber(newValue)) {
Ref { m_stdDeviationX }->setBaseValInternal(result->first);
Ref { m_stdDeviationY }->setBaseValInternal(result->second);
}
break;
case AttributeNames::inAttr:
Ref { m_in1 }->setBaseValInternal(newValue);
break;
case AttributeNames::dxAttr:
Ref { m_dx }->setBaseValInternal(newValue.toFloat());
break;
case AttributeNames::dyAttr:
Ref { m_dy }->setBaseValInternal(newValue.toFloat());
break;
default:
break;
}
SVGFilterPrimitiveStandardAttributes::attributeChanged(name, oldValue, newValue, attributeModificationReason);
}
void SVGFEDropShadowElement::svgAttributeChanged(const QualifiedName& attrName)
{
switch (attrName.nodeName()) {
case AttributeNames::inAttr: {
InstanceInvalidationGuard guard(*this);
updateSVGRendererForElementChange();
break;
}
case AttributeNames::stdDeviationAttr: {
if (stdDeviationX() < 0 || stdDeviationY() < 0) {
InstanceInvalidationGuard guard(*this);
markFilterEffectForRebuild();
return;
}
FALLTHROUGH;
}
case AttributeNames::dxAttr:
case AttributeNames::dyAttr: {
InstanceInvalidationGuard guard(*this);
primitiveAttributeChanged(attrName);
break;
}
default:
SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
break;
}
}
bool SVGFEDropShadowElement::setFilterEffectAttribute(FilterEffect& filterEffect, const QualifiedName& attrName)
{
auto& effect = downcast<FEDropShadow>(filterEffect);
switch (attrName.nodeName()) {
case AttributeNames::stdDeviationAttr:
return effect.setStdDeviationX(stdDeviationX()) || effect.setStdDeviationY(stdDeviationY());
case AttributeNames::dxAttr:
return effect.setDx(dx());
case AttributeNames::dyAttr:
return effect.setDy(dy());
case AttributeNames::flood_colorAttr: {
auto& style = renderer()->style();
return effect.setShadowColor(style.colorResolvingCurrentColor(style.svgStyle().floodColor()));
}
case AttributeNames::flood_opacityAttr:
return effect.setShadowOpacity(renderer()->style().svgStyle().floodOpacity());
default:
break;
}
ASSERT_NOT_REACHED();
return false;
}
bool SVGFEDropShadowElement::isIdentity() const
{
return !stdDeviationX() && !stdDeviationY() && !dx() && !dy();
}
IntOutsets SVGFEDropShadowElement::outsets(const FloatRect& targetBoundingBox, SVGUnitTypes::SVGUnitType primitiveUnits) const
{
auto offset = SVGFilter::calculateResolvedSize({ dx(), dy() }, targetBoundingBox, primitiveUnits);
auto stdDeviation = SVGFilter::calculateResolvedSize({ stdDeviationX(), stdDeviationY() }, targetBoundingBox, primitiveUnits);
return FEDropShadow::calculateOutsets(offset, stdDeviation);
}
RefPtr<FilterEffect> SVGFEDropShadowElement::createFilterEffect(const FilterEffectVector&, const GraphicsContext&) const
{
CheckedPtr renderer = this->renderer();
if (!renderer)
return nullptr;
if (stdDeviationX() < 0 || stdDeviationY() < 0)
return nullptr;
auto& style = renderer->style();
const SVGRenderStyle& svgStyle = style.svgStyle();
Color color = style.colorWithColorFilter(svgStyle.floodColor());
float opacity = svgStyle.floodOpacity();
return FEDropShadow::create(stdDeviationX(), stdDeviationY(), dx(), dy(), color, opacity);
}
} // namespace WebCore
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