WebCore/svg/SVGFEMorphologyElement.cpp

/*
 * Copyright (C) 2009 Dirk Schulze <krit@webkit.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"

#if ENABLE(SVG) && ENABLE(FILTERS)
#include "SVGFEMorphologyElement.h"

#include "Attribute.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"

namespace WebCore {

char SVGRadiusXAttrIdentifier[] = "SVGRadiusXAttr";
char SVGRadiusYAttrIdentifier[] = "SVGRadiusYAttr";

inline SVGFEMorphologyElement::SVGFEMorphologyElement(const QualifiedName& tagName, Document* document)
    : SVGFilterPrimitiveStandardAttributes(tagName, document)
    , m__operator(FEMORPHOLOGY_OPERATOR_ERODE)
{
}

PassRefPtr<SVGFEMorphologyElement> SVGFEMorphologyElement::create(const QualifiedName& tagName, Document* document)
{
    return adoptRef(new SVGFEMorphologyElement(tagName, document));
}

void SVGFEMorphologyElement::setRadius(float, float)
{
    // FIXME: Needs an implementation.
}

void SVGFEMorphologyElement::parseMappedAttribute(Attribute* attr)
{
    const String& value = attr->value();
    if (attr->name() == SVGNames::operatorAttr) {
        if (value == "erode")
            set_operatorBaseValue(FEMORPHOLOGY_OPERATOR_ERODE);
        else if (value == "dilate")
            set_operatorBaseValue(FEMORPHOLOGY_OPERATOR_DILATE);
    } else if (attr->name() == SVGNames::inAttr)
        setIn1BaseValue(value);
    else if (attr->name() == SVGNames::radiusAttr) {
        float x, y;
        if (parseNumberOptionalNumber(value, x, y)) {
            setRadiusXBaseValue(x);
            setRadiusYBaseValue(y);
        }
    } else
        SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
}

void SVGFEMorphologyElement::synchronizeProperty(const QualifiedName& attrName)
{
    SVGFilterPrimitiveStandardAttributes::synchronizeProperty(attrName);

    if (attrName == anyQName()) {
        synchronize_operator();
        synchronizeIn1();
        synchronizeRadiusX();
        synchronizeRadiusY();
        return;
    }

    if (attrName == SVGNames::operatorAttr)
        synchronize_operator();
    else if (attrName == SVGNames::inAttr)
        synchronizeIn1();
    else if (attrName == SVGNames::radiusAttr) {
        synchronizeRadiusX();
        synchronizeRadiusY();
    }
}

PassRefPtr<FilterEffect> SVGFEMorphologyElement::build(SVGFilterBuilder* filterBuilder)
{
    FilterEffect* input1 = filterBuilder->getEffectById(in1());
    float xRadius = radiusX();
    float yRadius = radiusY();

    if (!input1)
        return 0;

    if (xRadius < 0 || yRadius < 0)
        return 0;

    return FEMorphology::create(input1, static_cast<MorphologyOperatorType>(_operator()), xRadius, yRadius);
}

} //namespace WebCore

#endif // ENABLE(SVG)