src/third_party/WebKit/Source/core/svg/SVGFESpecularLightingElement.cpp

   1 /*
   2  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
   3  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
   4  * Copyright (C) 2005 Oliver Hunt <oliver@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 #include "core/svg/SVGFESpecularLightingElement.h"
  25
  26 #include "platform/graphics/filters/FilterEffect.h"
  27 #include "core/rendering/style/RenderStyle.h"
  28 #include "core/svg/SVGParserUtilities.h"
  29 #include "core/svg/graphics/filters/SVGFilterBuilder.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     ScriptWrappable::init(this);
  42
  43     addToPropertyMap(m_specularConstant);
  44     addToPropertyMap(m_specularExponent);
  45     addToPropertyMap(m_surfaceScale);
  46     addToPropertyMap(m_kernelUnitLength);
  47     addToPropertyMap(m_in1);
  48 }
  49
  50 DEFINE_NODE_FACTORY(SVGFESpecularLightingElement)
  51
  52 bool SVGFESpecularLightingElement::isSupportedAttribute(const QualifiedName& attrName)
  53 {
  54     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
  55     if (supportedAttributes.isEmpty()) {
  56         supportedAttributes.add(SVGNames::inAttr);
  57         supportedAttributes.add(SVGNames::specularConstantAttr);
  58         supportedAttributes.add(SVGNames::specularExponentAttr);
  59         supportedAttributes.add(SVGNames::surfaceScaleAttr);
  60         supportedAttributes.add(SVGNames::kernelUnitLengthAttr);
  61     }
  62     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
  63 }
  64
  65 void SVGFESpecularLightingElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
  66 {
  67     if (!isSupportedAttribute(name)) {
  68         SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
  69         return;
  70     }
  71
  72     SVGParsingError parseError = NoError;
  73
  74     if (name == SVGNames::inAttr)
  75         m_in1->setBaseValueAsString(value, parseError);
  76     else if (name == SVGNames::surfaceScaleAttr)
  77         m_surfaceScale->setBaseValueAsString(value, parseError);
  78     else if (name == SVGNames::specularConstantAttr)
  79         m_specularConstant->setBaseValueAsString(value, parseError);
  80     else if (name == SVGNames::specularExponentAttr)
  81         m_specularExponent->setBaseValueAsString(value, parseError);
  82     else if (name == SVGNames::kernelUnitLengthAttr)
  83         m_kernelUnitLength->setBaseValueAsString(value, parseError);
  84     else
  85         ASSERT_NOT_REACHED();
  86
  87     reportAttributeParsingError(parseError, name, value);
  88 }
  89
  90 bool SVGFESpecularLightingElement::setFilterEffectAttribute(FilterEffect* effect, const QualifiedName& attrName)
  91 {
  92     FESpecularLighting* specularLighting = static_cast<FESpecularLighting*>(effect);
  93
  94     if (attrName == SVGNames::lighting_colorAttr) {
  95         RenderObject* renderer = this->renderer();
  96         ASSERT(renderer);
  97         ASSERT(renderer->style());
  98         return specularLighting->setLightingColor(renderer->style()->svgStyle().lightingColor());
  99     }
 100     if (attrName == SVGNames::surfaceScaleAttr)
 101         return specularLighting->setSurfaceScale(m_surfaceScale->currentValue()->value());
 102     if (attrName == SVGNames::specularConstantAttr)
 103         return specularLighting->setSpecularConstant(m_specularConstant->currentValue()->value());
 104     if (attrName == SVGNames::specularExponentAttr)
 105         return specularLighting->setSpecularExponent(m_specularExponent->currentValue()->value());
 106
 107     LightSource* lightSource = const_cast<LightSource*>(specularLighting->lightSource());
 108     SVGFELightElement* lightElement = SVGFELightElement::findLightElement(*this);
 109     ASSERT(lightSource);
 110     ASSERT(lightElement);
 111     ASSERT(effect->filter());
 112
 113     if (attrName == SVGNames::azimuthAttr)
 114         return lightSource->setAzimuth(lightElement->azimuth()->currentValue()->value());
 115     if (attrName == SVGNames::elevationAttr)
 116         return lightSource->setElevation(lightElement->elevation()->currentValue()->value());
 117     if (attrName == SVGNames::xAttr || attrName == SVGNames::yAttr || attrName == SVGNames::zAttr)
 118         return lightSource->setPosition(effect->filter()->resolve3dPoint(lightElement->position()));
 119     if (attrName == SVGNames::pointsAtXAttr || attrName == SVGNames::pointsAtYAttr || attrName == SVGNames::pointsAtZAttr)
 120         return lightSource->setPointsAt(effect->filter()->resolve3dPoint(lightElement->pointsAt()));
 121     if (attrName == SVGNames::specularExponentAttr)
 122         return lightSource->setSpecularExponent(lightElement->specularExponent()->currentValue()->value());
 123     if (attrName == SVGNames::limitingConeAngleAttr)
 124         return lightSource->setLimitingConeAngle(lightElement->limitingConeAngle()->currentValue()->value());
 125
 126     ASSERT_NOT_REACHED();
 127     return false;
 128 }
 129
 130 void SVGFESpecularLightingElement::svgAttributeChanged(const QualifiedName& attrName)
 131 {
 132     if (!isSupportedAttribute(attrName)) {
 133         SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
 134         return;
 135     }
 136
 137     SVGElement::InvalidationGuard invalidationGuard(this);
 138
 139     if (attrName == SVGNames::surfaceScaleAttr
 140         || attrName == SVGNames::specularConstantAttr
 141         || attrName == SVGNames::specularExponentAttr
 142         || attrName == SVGNames::kernelUnitLengthAttr) {
 143         primitiveAttributeChanged(attrName);
 144         return;
 145     }
 146
 147     if (attrName == SVGNames::inAttr) {
 148         invalidate();
 149         return;
 150     }
 151
 152     ASSERT_NOT_REACHED();
 153 }
 154
 155 void SVGFESpecularLightingElement::lightElementAttributeChanged(const SVGFELightElement* lightElement, const QualifiedName& attrName)
 156 {
 157     if (SVGFELightElement::findLightElement(*this) != lightElement)
 158         return;
 159
 160     // The light element has different attribute names so attrName can identify the requested attribute.
 161     primitiveAttributeChanged(attrName);
 162 }
 163
 164 PassRefPtr<FilterEffect> SVGFESpecularLightingElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
 165 {
 166     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
 167
 168     if (!input1)
 169         return nullptr;
 170
 171     SVGFELightElement* lightNode = SVGFELightElement::findLightElement(*this);
 172     if (!lightNode)
 173         return nullptr;
 174
 175     RenderObject* renderer = this->renderer();
 176     if (!renderer)
 177         return nullptr;
 178
 179     ASSERT(renderer->style());
 180     Color color = renderer->style()->svgStyle().lightingColor();
 181
 182     RefPtr<LightSource> lightSource = lightNode->lightSource(filter);
 183     RefPtr<FilterEffect> effect = FESpecularLighting::create(filter, color, m_surfaceScale->currentValue()->value(), m_specularConstant->currentValue()->value(),
 184         m_specularExponent->currentValue()->value(), kernelUnitLengthX()->currentValue()->value(), kernelUnitLengthY()->currentValue()->value(), lightSource.release());
 185     effect->inputEffects().append(input1);
 186     return effect.release();
 187 }
 188
 189 }