mirror of
https://github.com/darlinghq/darling-WebCore.git
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68 lines
2.8 KiB
C++
68 lines
2.8 KiB
C++
/*
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* Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "SVGFESpotLightElement.h"
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#include "GeometryUtilities.h"
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#include "SVGFilterBuilder.h"
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#include "SVGNames.h"
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#include "SpotLightSource.h"
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#include <wtf/MathExtras.h>
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namespace WebCore {
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inline SVGFESpotLightElement::SVGFESpotLightElement(const QualifiedName& tagName, Document& document)
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: SVGFELightElement(tagName, document)
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{
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ASSERT(hasTagName(SVGNames::feSpotLightTag));
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}
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Ref<SVGFESpotLightElement> SVGFESpotLightElement::create(const QualifiedName& tagName, Document& document)
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{
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return adoptRef(*new SVGFESpotLightElement(tagName, document));
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}
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Ref<LightSource> SVGFESpotLightElement::lightSource(SVGFilterBuilder& builder) const
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{
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FloatPoint3D position;
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FloatPoint3D pointsAt;
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if (builder.primitiveUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
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FloatRect referenceBox = builder.targetBoundingBox();
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position.setX(referenceBox.x() + x() * referenceBox.width());
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position.setY(referenceBox.y() + y() * referenceBox.height());
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// https://www.w3.org/TR/SVG/filters.html#fePointLightZAttribute and https://www.w3.org/TR/SVG/coords.html#Units_viewport_percentage
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position.setZ(z() * euclidianDistance(referenceBox.minXMinYCorner(), referenceBox.maxXMaxYCorner()) / sqrtOfTwoFloat);
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pointsAt.setX(referenceBox.x() + pointsAtX() * referenceBox.width());
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pointsAt.setY(referenceBox.y() + pointsAtY() * referenceBox.height());
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// https://www.w3.org/TR/SVG/filters.html#fePointLightZAttribute and https://www.w3.org/TR/SVG/coords.html#Units_viewport_percentage
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pointsAt.setZ(pointsAtZ() * euclidianDistance(referenceBox.minXMinYCorner(), referenceBox.maxXMaxYCorner()) / sqrtOfTwoFloat);
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} else {
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position = FloatPoint3D(x(), y(), z());
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pointsAt = FloatPoint3D(pointsAtX(), pointsAtY(), pointsAtZ());
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}
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return SpotLightSource::create(position, pointsAt, specularExponent(), limitingConeAngle());
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}
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}
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