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SVGFEDiffuseLightingElement.cpp

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00001 /*
00002      Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>
00003      
00004      This library is free software; you can redistribute it and/or
00005      modify it under the terms of the GNU Library General Public
00006      License as published by the Free Software Foundation; either
00007      version 2 of the License, or (at your option) any later version.
00008      
00009      This library is distributed in the hope that it will be useful,
00010      but WITHOUT ANY WARRANTY; without even the implied warranty of
00011      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012      Library General Public License for more details.
00013      
00014      You should have received a copy of the GNU Library General Public License
00015      along with this library; see the file COPYING.LIB.  If not, write to
00016      the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017      Boston, MA 02110-1301, USA.
00018  */
00019 
00020 #include "config.h"
00021 
00022 #if ENABLE(SVG) && ENABLE(SVG_FILTERS)
00023 #include "SVGFEDiffuseLightingElement.h"
00024 
00025 #include "Attr.h"
00026 #include "RenderObject.h"
00027 #include "SVGColor.h"
00028 #include "SVGFELightElement.h"
00029 #include "SVGNames.h"
00030 #include "SVGParserUtilities.h"
00031 #include "SVGRenderStyle.h"
00032 #include "SVGFEDiffuseLighting.h"
00033 #include "SVGResourceFilter.h"
00034 
00035 namespace WebCore {
00036 
00037 SVGFEDiffuseLightingElement::SVGFEDiffuseLightingElement(const QualifiedName& tagName, Document* doc)
00038     : SVGFilterPrimitiveStandardAttributes(tagName, doc)
00039     , m_diffuseConstant(1.0f)
00040     , m_surfaceScale(1.0f)
00041     , m_kernelUnitLengthX(0.0f)
00042     , m_kernelUnitLengthY(0.0f)
00043     , m_filterEffect(0)
00044 {
00045 }
00046 
00047 SVGFEDiffuseLightingElement::~SVGFEDiffuseLightingElement()
00048 {
00049     delete m_filterEffect;
00050 }
00051 
00052 ANIMATED_PROPERTY_DEFINITIONS(SVGFEDiffuseLightingElement, String, String, string, In1, in1, SVGNames::inAttr, m_in1)
00053 ANIMATED_PROPERTY_DEFINITIONS(SVGFEDiffuseLightingElement, float, Number, number, DiffuseConstant, diffuseConstant, SVGNames::diffuseConstantAttr, m_diffuseConstant)
00054 ANIMATED_PROPERTY_DEFINITIONS(SVGFEDiffuseLightingElement, float, Number, number, SurfaceScale, surfaceScale, SVGNames::surfaceScaleAttr, m_surfaceScale)
00055 ANIMATED_PROPERTY_DEFINITIONS_WITH_CUSTOM_IDENTIFIER(SVGFEDiffuseLightingElement, float, Number, number, KernelUnitLengthX, kernelUnitLengthX, SVGNames::kernelUnitLengthAttr, "kernelUnitLengthX", m_kernelUnitLengthX)
00056 ANIMATED_PROPERTY_DEFINITIONS_WITH_CUSTOM_IDENTIFIER(SVGFEDiffuseLightingElement, float, Number, number, KernelUnitLengthY, kernelUnitLengthY, SVGNames::kernelUnitLengthAttr, "kernelUnitLengthY", m_kernelUnitLengthY)
00057 
00058 void SVGFEDiffuseLightingElement::parseMappedAttribute(MappedAttribute *attr)
00059 {
00060     const String& value = attr->value();
00061     if (attr->name() == SVGNames::inAttr)
00062         setIn1BaseValue(value);
00063     else if (attr->name() == SVGNames::surfaceScaleAttr)
00064         setSurfaceScaleBaseValue(value.toFloat());
00065     else if (attr->name() == SVGNames::diffuseConstantAttr)
00066         setDiffuseConstantBaseValue(value.toInt());
00067     else if (attr->name() == SVGNames::kernelUnitLengthAttr) {
00068         float x, y;
00069         if (parseNumberOptionalNumber(value, x, y)) {
00070             setKernelUnitLengthXBaseValue(x);
00071             setKernelUnitLengthYBaseValue(y);
00072         }
00073     } else
00074         SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
00075 }
00076 
00077 SVGFilterEffect* SVGFEDiffuseLightingElement::filterEffect(SVGResourceFilter* filter) const
00078 {
00079     if (!m_filterEffect) 
00080         m_filterEffect = new SVGFEDiffuseLighting(filter);
00081 
00082     m_filterEffect->setIn(in1());
00083     m_filterEffect->setDiffuseConstant(diffuseConstant());
00084     m_filterEffect->setSurfaceScale(surfaceScale());
00085     m_filterEffect->setKernelUnitLengthX(kernelUnitLengthX());
00086     m_filterEffect->setKernelUnitLengthY(kernelUnitLengthY());
00087 
00088     SVGFEDiffuseLightingElement* nonConstThis = const_cast<SVGFEDiffuseLightingElement*>(this);
00089 
00090     RenderStyle* parentStyle = nonConstThis->styleForRenderer(parent()->renderer());
00091     RenderStyle* filterStyle = nonConstThis->resolveStyle(parentStyle);
00092     
00093     m_filterEffect->setLightingColor(filterStyle->svgStyle()->lightingColor());
00094     setStandardAttributes(m_filterEffect);
00095  
00096     parentStyle->deref(document()->renderArena());
00097     filterStyle->deref(document()->renderArena());
00098     
00099     updateLights();
00100     return m_filterEffect;
00101 }
00102 
00103 void SVGFEDiffuseLightingElement::updateLights() const
00104 {
00105     if (!m_filterEffect)
00106         return;
00107     
00108     SVGLightSource* light = 0;
00109     for (Node* n = firstChild(); n; n = n->nextSibling()) {
00110         if (n->hasTagName(SVGNames::feDistantLightTag) ||
00111             n->hasTagName(SVGNames::fePointLightTag) ||
00112             n->hasTagName(SVGNames::feSpotLightTag)) {
00113             SVGFELightElement* lightNode = static_cast<SVGFELightElement*>(n); 
00114             light = lightNode->lightSource();
00115             break;
00116         }
00117     }
00118 
00119     m_filterEffect->setLightSource(light);
00120 }
00121 
00122 }
00123 
00124 #endif // ENABLE(SVG)
00125 
00126 // vim:ts=4:noet

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