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 #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