/*

 Copyright (C) 2006 Oliver Hunt <oliver@nerget.com>

 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 "SVGFEDisplacementMapElement.h"

#include "Attribute.h"

namespace WebCore {

SVGFEDisplacementMapElement::SVGFEDisplacementMapElement(const QualifiedName& tagName, Document* doc)

    : SVGFilterPrimitiveStandardAttributes(tagName, doc)

    , m_xChannelSelector(CHANNEL_A)

    , m_yChannelSelector(CHANNEL_A)

{

}

SVGFEDisplacementMapElement::~SVGFEDisplacementMapElement()

{

}

ChannelSelectorType SVGFEDisplacementMapElement::stringToChannel(const String& key)

{

    if (key == "R")

        return CHANNEL_R;

    else if (key == "G")

        return CHANNEL_G;

    else if (key == "B")

        return CHANNEL_B;

    else if (key == "A")

        return CHANNEL_A;

    return CHANNEL_UNKNOWN;

}

void SVGFEDisplacementMapElement::parseMappedAttribute(Attribute* attr)

{

    const String& value = attr->value();

    if (attr->name() == SVGNames::xChannelSelectorAttr)

        setXChannelSelectorBaseValue(stringToChannel(value));

    else if (attr->name() == SVGNames::yChannelSelectorAttr)

        setYChannelSelectorBaseValue(stringToChannel(value));

    else if (attr->name() == SVGNames::inAttr)

        setIn1BaseValue(value);

    else if (attr->name() == SVGNames::in2Attr)

        setIn2BaseValue(value);

    else if (attr->name() == SVGNames::scaleAttr)

        setScaleBaseValue(value.toFloat());

    else

        SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);

}

void SVGFEDisplacementMapElement::synchronizeProperty(const QualifiedName& attrName)

{

    SVGFilterPrimitiveStandardAttributes::synchronizeProperty(attrName);

    if (attrName == anyQName()) {

        synchronizeXChannelSelector();

        synchronizeYChannelSelector();

        synchronizeIn1();

        synchronizeIn2();

        synchronizeScale();

        return;

    }

    if (attrName == SVGNames::xChannelSelectorAttr)

        synchronizeXChannelSelector();

    else if (attrName == SVGNames::yChannelSelectorAttr)

        synchronizeYChannelSelector();

    else if (attrName == SVGNames::inAttr)

        synchronizeIn1();

    else if (attrName == SVGNames::in2Attr)

        synchronizeIn2();

    else if (attrName == SVGNames::scaleAttr)

        synchronizeScale();

}

PassRefPtr<FilterEffect> SVGFEDisplacementMapElement::build(SVGFilterBuilder* filterBuilder)

{

    FilterEffect* input1 = filterBuilder->getEffectById(in1());

    FilterEffect* input2 = filterBuilder->getEffectById(in2());

    if (!input1 || !input2)

        return 0;

    return FEDisplacementMap::create(input1, input2, static_cast<ChannelSelectorType>(xChannelSelector()), 

                                     static_cast<ChannelSelectorType>(yChannelSelector()), scale());

}

}

#endif // ENABLE(SVG)

// vim:ts=4:noet