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SVGFEColorMatrixElement.cpp
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149 lines (125 loc) · 4.95 KB
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/*
* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
* Copyright (C) 2018-2019 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 "SVGFEColorMatrixElement.h"
#include "FilterEffect.h"
#include "SVGFilterBuilder.h"
#include "SVGNames.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SVGFEColorMatrixElement);
inline SVGFEColorMatrixElement::SVGFEColorMatrixElement(const QualifiedName& tagName, Document& document)
: SVGFilterPrimitiveStandardAttributes(tagName, document)
{
ASSERT(hasTagName(SVGNames::feColorMatrixTag));
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::inAttr, &SVGFEColorMatrixElement::m_in1>();
PropertyRegistry::registerProperty<SVGNames::typeAttr, ColorMatrixType, &SVGFEColorMatrixElement::m_type>();
PropertyRegistry::registerProperty<SVGNames::valuesAttr, &SVGFEColorMatrixElement::m_values>();
});
}
Ref<SVGFEColorMatrixElement> SVGFEColorMatrixElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGFEColorMatrixElement(tagName, document));
}
void SVGFEColorMatrixElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == SVGNames::typeAttr) {
auto propertyValue = SVGPropertyTraits<ColorMatrixType>::fromString(value);
if (propertyValue > 0)
m_type->setBaseValInternal<ColorMatrixType>(propertyValue);
return;
}
if (name == SVGNames::inAttr) {
m_in1->setBaseValInternal(value);
return;
}
if (name == SVGNames::valuesAttr) {
m_values->baseVal()->parse(value);
return;
}
SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
}
bool SVGFEColorMatrixElement::setFilterEffectAttribute(FilterEffect* effect, const QualifiedName& attrName)
{
FEColorMatrix* colorMatrix = static_cast<FEColorMatrix*>(effect);
if (attrName == SVGNames::typeAttr)
return colorMatrix->setType(type());
if (attrName == SVGNames::valuesAttr)
return colorMatrix->setValues(values());
ASSERT_NOT_REACHED();
return false;
}
void SVGFEColorMatrixElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (attrName == SVGNames::typeAttr || attrName == SVGNames::valuesAttr) {
InstanceInvalidationGuard guard(*this);
primitiveAttributeChanged(attrName);
return;
}
if (attrName == SVGNames::inAttr) {
InstanceInvalidationGuard guard(*this);
invalidate();
return;
}
SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
}
RefPtr<FilterEffect> SVGFEColorMatrixElement::build(SVGFilterBuilder* filterBuilder, Filter& filter) const
{
auto input1 = filterBuilder->getEffectById(in1());
if (!input1)
return nullptr;
Vector<float> filterValues;
ColorMatrixType filterType = type();
// Use defaults if values is empty (SVG 1.1 15.10).
if (!hasAttribute(SVGNames::valuesAttr)) {
switch (filterType) {
case FECOLORMATRIX_TYPE_MATRIX: {
static constexpr unsigned matrixValueCount = 20;
filterValues.reserveInitialCapacity(matrixValueCount);
for (size_t i = 0; i < matrixValueCount; i++)
filterValues.uncheckedAppend((i % 6) ? 0 : 1);
break;
}
case FECOLORMATRIX_TYPE_HUEROTATE:
filterValues = { 0 };
break;
case FECOLORMATRIX_TYPE_SATURATE:
filterValues = { 1 };
break;
default:
break;
}
} else {
unsigned size = values().size();
if ((filterType == FECOLORMATRIX_TYPE_MATRIX && size != 20)
|| (filterType == FECOLORMATRIX_TYPE_HUEROTATE && size != 1)
|| (filterType == FECOLORMATRIX_TYPE_SATURATE && size != 1))
return nullptr;
filterValues = values();
filterValues.shrinkToFit();
}
auto effect = FEColorMatrix::create(filter, filterType, WTFMove(filterValues));
effect->inputEffects() = { input1 };
return effect;
}
} // namespace WebCore