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      1 /*
      2     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      3                   2004, 2005, 2006 Rob Buis <buis (at) kde.org>
      4                   2005 Oliver Hunt <oliver (at) nerget.com>
      5 
      6     This library is free software; you can redistribute it and/or
      7     modify it under the terms of the GNU Library General Public
      8     License as published by the Free Software Foundation; either
      9     version 2 of the License, or (at your option) any later version.
     10 
     11     This library is distributed in the hope that it will be useful,
     12     but WITHOUT ANY WARRANTY; without even the implied warranty of
     13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14     Library General Public License for more details.
     15 
     16     You should have received a copy of the GNU Library General Public License
     17     along with this library; see the file COPYING.LIB.  If not, write to
     18     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19     Boston, MA 02110-1301, USA.
     20 */
     21 
     22 #include "config.h"
     23 
     24 #if ENABLE(SVG) && ENABLE(FILTERS)
     25 #include "SVGFESpecularLightingElement.h"
     26 
     27 #include "MappedAttribute.h"
     28 #include "RenderObject.h"
     29 #include "SVGColor.h"
     30 #include "SVGFELightElement.h"
     31 #include "SVGNames.h"
     32 #include "SVGParserUtilities.h"
     33 #include "SVGResourceFilter.h"
     34 
     35 namespace WebCore {
     36 
     37 SVGFESpecularLightingElement::SVGFESpecularLightingElement(const QualifiedName& tagName, Document* doc)
     38     : SVGFilterPrimitiveStandardAttributes(tagName, doc)
     39     , m_specularConstant(1.0f)
     40     , m_specularExponent(1.0f)
     41     , m_surfaceScale(1.0f)
     42 {
     43 }
     44 
     45 SVGFESpecularLightingElement::~SVGFESpecularLightingElement()
     46 {
     47 }
     48 
     49 void SVGFESpecularLightingElement::parseMappedAttribute(MappedAttribute* attr)
     50 {
     51     const String& value = attr->value();
     52     if (attr->name() == SVGNames::inAttr)
     53         setIn1BaseValue(value);
     54     else if (attr->name() == SVGNames::surfaceScaleAttr)
     55         setSurfaceScaleBaseValue(value.toFloat());
     56     else if (attr->name() == SVGNames::specularConstantAttr)
     57         setSpecularConstantBaseValue(value.toFloat());
     58     else if (attr->name() == SVGNames::specularExponentAttr)
     59         setSpecularExponentBaseValue(value.toFloat());
     60     else if (attr->name() == SVGNames::kernelUnitLengthAttr) {
     61         float x, y;
     62         if (parseNumberOptionalNumber(value, x, y)) {
     63             setKernelUnitLengthXBaseValue(x);
     64             setKernelUnitLengthYBaseValue(y);
     65         }
     66     } else
     67         SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
     68 }
     69 
     70 void SVGFESpecularLightingElement::synchronizeProperty(const QualifiedName& attrName)
     71 {
     72     SVGFilterPrimitiveStandardAttributes::synchronizeProperty(attrName);
     73 
     74     if (attrName == anyQName()) {
     75         synchronizeIn1();
     76         synchronizeSurfaceScale();
     77         synchronizeSpecularConstant();
     78         synchronizeSpecularExponent();
     79         synchronizeKernelUnitLengthX();
     80         synchronizeKernelUnitLengthY();
     81         return;
     82     }
     83 
     84     if (attrName == SVGNames::inAttr)
     85         synchronizeIn1();
     86     else if (attrName == SVGNames::surfaceScaleAttr)
     87         synchronizeSurfaceScale();
     88     else if (attrName == SVGNames::specularConstantAttr)
     89         synchronizeSpecularConstant();
     90     else if (attrName == SVGNames::specularExponentAttr)
     91         synchronizeSpecularExponent();
     92     else if (attrName == SVGNames::kernelUnitLengthAttr) {
     93         synchronizeKernelUnitLengthX();
     94         synchronizeKernelUnitLengthY();
     95     }
     96 }
     97 
     98 PassRefPtr<LightSource> SVGFESpecularLightingElement::findLights() const
     99 {
    100     for (Node* n = firstChild(); n; n = n->nextSibling()) {
    101         if (n->hasTagName(SVGNames::feDistantLightTag) ||
    102             n->hasTagName(SVGNames::fePointLightTag) ||
    103             n->hasTagName(SVGNames::feSpotLightTag)) {
    104             SVGFELightElement* lightNode = static_cast<SVGFELightElement*>(n);
    105             return lightNode->lightSource();
    106         }
    107     }
    108 
    109     return 0;
    110 }
    111 
    112 bool SVGFESpecularLightingElement::build(SVGResourceFilter* filterResource)
    113 {
    114     FilterEffect* input1 = filterResource->builder()->getEffectById(in1());
    115 
    116     if (!input1)
    117         return false;
    118 
    119     RefPtr<RenderStyle> filterStyle = styleForRenderer();
    120 
    121     Color color = filterStyle->svgStyle()->lightingColor();
    122 
    123     RefPtr<FilterEffect> effect = FESpecularLighting::create(input1, color, surfaceScale(), specularConstant(),
    124                                         specularExponent(), kernelUnitLengthX(), kernelUnitLengthY(), findLights());
    125     filterResource->addFilterEffect(this, effect.release());
    126 
    127     return true;
    128 }
    129 
    130 }
    131 
    132 #endif // ENABLE(SVG)
    133