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
31namespace blink {
32
33inline 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
48DEFINE_NODE_FACTORY(SVGFESpecularLightingElement)
49
50bool 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
63void 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
88bool 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
128void 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
153void 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
162PassRefPtr<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