Home | History | Annotate | Download | only in svg 
      1 /*
      2  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis (at) kde.org>
      4  * Copyright (C) 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 #include "core/svg/SVGFESpecularLightingElement.h"
     24 
     25 #include "core/rendering/RenderObject.h"
     26 #include "core/rendering/style/RenderStyle.h"
     27 #include "core/svg/SVGParserUtilities.h"
     28 #include "core/svg/graphics/filters/SVGFilterBuilder.h"
     29 #include "platform/graphics/filters/FilterEffect.h"
     30 
     31 namespace blink {
     32 
     33 inline SVGFESpecularLightingElement::SVGFESpecularLightingElement(Document& document)
     34     : SVGFilterPrimitiveStandardAttributes(SVGNames::feSpecularLightingTag, document)
     35     , m_specularConstant(SVGAnimatedNumber::create(this, SVGNames::specularConstantAttr, SVGNumber::create(1)))
     36     , m_specularExponent(SVGAnimatedNumber::create(this, SVGNames::specularExponentAttr, SVGNumber::create(1)))
     37     , m_surfaceScale(SVGAnimatedNumber::create(this, SVGNames::surfaceScaleAttr, SVGNumber::create(1)))
     38     , m_kernelUnitLength(SVGAnimatedNumberOptionalNumber::create(this, SVGNames::surfaceScaleAttr))
     39     , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
     40 {
     41     addToPropertyMap(m_specularConstant);
     42     addToPropertyMap(m_specularExponent);
     43     addToPropertyMap(m_surfaceScale);
     44     addToPropertyMap(m_kernelUnitLength);
     45     addToPropertyMap(m_in1);
     46 }
     47 
     48 DEFINE_NODE_FACTORY(SVGFESpecularLightingElement)
     49 
     50 bool SVGFESpecularLightingElement::isSupportedAttribute(const QualifiedName& attrName)
     51 {
     52     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     53     if (supportedAttributes.isEmpty()) {
     54         supportedAttributes.add(SVGNames::inAttr);
     55         supportedAttributes.add(SVGNames::specularConstantAttr);
     56         supportedAttributes.add(SVGNames::specularExponentAttr);
     57         supportedAttributes.add(SVGNames::surfaceScaleAttr);
     58         supportedAttributes.add(SVGNames::kernelUnitLengthAttr);
     59     }
     60     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
     61 }
     62 
     63 void SVGFESpecularLightingElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     64 {
     65     if (!isSupportedAttribute(name)) {
     66         SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
     67         return;
     68     }
     69 
     70     SVGParsingError parseError = NoError;
     71 
     72     if (name == SVGNames::inAttr)
     73         m_in1->setBaseValueAsString(value, parseError);
     74     else if (name == SVGNames::surfaceScaleAttr)
     75         m_surfaceScale->setBaseValueAsString(value, parseError);
     76     else if (name == SVGNames::specularConstantAttr)
     77         m_specularConstant->setBaseValueAsString(value, parseError);
     78     else if (name == SVGNames::specularExponentAttr)
     79         m_specularExponent->setBaseValueAsString(value, parseError);
     80     else if (name == SVGNames::kernelUnitLengthAttr)
     81         m_kernelUnitLength->setBaseValueAsString(value, parseError);
     82     else
     83         ASSERT_NOT_REACHED();
     84 
     85     reportAttributeParsingError(parseError, name, value);
     86 }
     87 
     88 bool SVGFESpecularLightingElement::setFilterEffectAttribute(FilterEffect* effect, const QualifiedName& attrName)
     89 {
     90     FESpecularLighting* specularLighting = static_cast<FESpecularLighting*>(effect);
     91 
     92     if (attrName == SVGNames::lighting_colorAttr) {
     93         RenderObject* renderer = this->renderer();
     94         ASSERT(renderer);
     95         ASSERT(renderer->style());
     96         return specularLighting->setLightingColor(renderer->style()->svgStyle().lightingColor());
     97     }
     98     if (attrName == SVGNames::surfaceScaleAttr)
     99         return specularLighting->setSurfaceScale(m_surfaceScale->currentValue()->value());
    100     if (attrName == SVGNames::specularConstantAttr)
    101         return specularLighting->setSpecularConstant(m_specularConstant->currentValue()->value());
    102     if (attrName == SVGNames::specularExponentAttr)
    103         return specularLighting->setSpecularExponent(m_specularExponent->currentValue()->value());
    104 
    105     LightSource* lightSource = const_cast<LightSource*>(specularLighting->lightSource());
    106     SVGFELightElement* lightElement = SVGFELightElement::findLightElement(*this);
    107     ASSERT(lightSource);
    108     ASSERT(lightElement);
    109     ASSERT(effect->filter());
    110 
    111     if (attrName == SVGNames::azimuthAttr)
    112         return lightSource->setAzimuth(lightElement->azimuth()->currentValue()->value());
    113     if (attrName == SVGNames::elevationAttr)
    114         return lightSource->setElevation(lightElement->elevation()->currentValue()->value());
    115     if (attrName == SVGNames::xAttr || attrName == SVGNames::yAttr || attrName == SVGNames::zAttr)
    116         return lightSource->setPosition(effect->filter()->resolve3dPoint(lightElement->position()));
    117     if (attrName == SVGNames::pointsAtXAttr || attrName == SVGNames::pointsAtYAttr || attrName == SVGNames::pointsAtZAttr)
    118         return lightSource->setPointsAt(effect->filter()->resolve3dPoint(lightElement->pointsAt()));
    119     if (attrName == SVGNames::specularExponentAttr)
    120         return lightSource->setSpecularExponent(lightElement->specularExponent()->currentValue()->value());
    121     if (attrName == SVGNames::limitingConeAngleAttr)
    122         return lightSource->setLimitingConeAngle(lightElement->limitingConeAngle()->currentValue()->value());
    123 
    124     ASSERT_NOT_REACHED();
    125     return false;
    126 }
    127 
    128 void SVGFESpecularLightingElement::svgAttributeChanged(const QualifiedName& attrName)
    129 {
    130     if (!isSupportedAttribute(attrName)) {
    131         SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
    132         return;
    133     }
    134 
    135     SVGElement::InvalidationGuard invalidationGuard(this);
    136 
    137     if (attrName == SVGNames::surfaceScaleAttr
    138         || attrName == SVGNames::specularConstantAttr
    139         || attrName == SVGNames::specularExponentAttr
    140         || attrName == SVGNames::kernelUnitLengthAttr) {
    141         primitiveAttributeChanged(attrName);
    142         return;
    143     }
    144 
    145     if (attrName == SVGNames::inAttr) {
    146         invalidate();
    147         return;
    148     }
    149 
    150     ASSERT_NOT_REACHED();
    151 }
    152 
    153 void SVGFESpecularLightingElement::lightElementAttributeChanged(const SVGFELightElement* lightElement, const QualifiedName& attrName)
    154 {
    155     if (SVGFELightElement::findLightElement(*this) != lightElement)
    156         return;
    157 
    158     // The light element has different attribute names so attrName can identify the requested attribute.
    159     primitiveAttributeChanged(attrName);
    160 }
    161 
    162 PassRefPtr<FilterEffect> SVGFESpecularLightingElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
    163 {
    164     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
    165 
    166     if (!input1)
    167         return nullptr;
    168 
    169     SVGFELightElement* lightNode = SVGFELightElement::findLightElement(*this);
    170     if (!lightNode)
    171         return nullptr;
    172 
    173     RenderObject* renderer = this->renderer();
    174     if (!renderer)
    175         return nullptr;
    176 
    177     ASSERT(renderer->style());
    178     Color color = renderer->style()->svgStyle().lightingColor();
    179 
    180     RefPtr<LightSource> lightSource = lightNode->lightSource(filter);
    181     RefPtr<FilterEffect> effect = FESpecularLighting::create(filter, color, m_surfaceScale->currentValue()->value(), m_specularConstant->currentValue()->value(),
    182         m_specularExponent->currentValue()->value(), kernelUnitLengthX()->currentValue()->value(), kernelUnitLengthY()->currentValue()->value(), lightSource.release());
    183     effect->inputEffects().append(input1);
    184     return effect.release();
    185 }
    186 
    187 } // namespace blink
    188