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/*
Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>
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 "SVGFEDiffuseLightingElement.h"
#include "Attr.h"
#include "MappedAttribute.h"
#include "RenderObject.h"
#include "SVGColor.h"
#include "SVGFEDiffuseLighting.h"
#include "SVGFELightElement.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGRenderStyle.h"
#include "SVGResourceFilter.h"
namespace WebCore {
char SVGKernelUnitLengthXIdentifier[] = "SVGKernelUnitLengthX";
char SVGKernelUnitLengthYIdentifier[] = "SVGKernelUnitLengthY";
SVGFEDiffuseLightingElement::SVGFEDiffuseLightingElement(const QualifiedName& tagName, Document* doc)
: SVGFilterPrimitiveStandardAttributes(tagName, doc)
, m_in1(this, SVGNames::inAttr)
, m_diffuseConstant(this, SVGNames::diffuseConstantAttr, 1.0f)
, m_surfaceScale(this, SVGNames::surfaceScaleAttr, 1.0f)
, m_kernelUnitLengthX(this, SVGNames::kernelUnitLengthAttr)
, m_kernelUnitLengthY(this, SVGNames::kernelUnitLengthAttr)
{
}
SVGFEDiffuseLightingElement::~SVGFEDiffuseLightingElement()
{
}
void SVGFEDiffuseLightingElement::parseMappedAttribute(MappedAttribute *attr)
{
const String& value = attr->value();
if (attr->name() == SVGNames::inAttr)
setIn1BaseValue(value);
else if (attr->name() == SVGNames::surfaceScaleAttr)
setSurfaceScaleBaseValue(value.toFloat());
else if (attr->name() == SVGNames::diffuseConstantAttr)
setDiffuseConstantBaseValue(value.toInt());
else if (attr->name() == SVGNames::kernelUnitLengthAttr) {
float x, y;
if (parseNumberOptionalNumber(value, x, y)) {
setKernelUnitLengthXBaseValue(x);
setKernelUnitLengthYBaseValue(y);
}
} else
SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
}
bool SVGFEDiffuseLightingElement::build(SVGResourceFilter* filterResource)
{
FilterEffect* input1 = filterResource->builder()->getEffectById(in1());
if (!input1)
return false;
RefPtr<RenderStyle> filterStyle = styleForRenderer();
Color color = filterStyle->svgStyle()->lightingColor();
RefPtr<FilterEffect> effect = FEDiffuseLighting::create(input1, color, surfaceScale(), diffuseConstant(),
kernelUnitLengthX(), kernelUnitLengthY(), findLights());
filterResource->addFilterEffect(this, effect.release());
return true;
}
PassRefPtr<LightSource> SVGFEDiffuseLightingElement::findLights() const
{
for (Node* n = firstChild(); n; n = n->nextSibling()) {
if (n->hasTagName(SVGNames::feDistantLightTag) ||
n->hasTagName(SVGNames::fePointLightTag) ||
n->hasTagName(SVGNames::feSpotLightTag)) {
SVGFELightElement* lightNode = static_cast<SVGFELightElement*>(n);
return lightNode->lightSource();
}
}
return 0;
}
}
#endif // ENABLE(SVG)
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