1/*
2 * Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#include "config.h"
21
22#if ENABLE(SVG) && ENABLE(FILTERS)
23#include "SVGFEDiffuseLightingElement.h"
24
25#include "Attr.h"
26#include "FEDiffuseLighting.h"
27#include "FilterEffect.h"
28#include "RenderStyle.h"
29#include "SVGColor.h"
30#include "SVGElementInstance.h"
31#include "SVGFELightElement.h"
32#include "SVGFilterBuilder.h"
33#include "SVGNames.h"
34#include "SVGParserUtilities.h"
35
36namespace WebCore {
37
38// Animated property definitions
39DEFINE_ANIMATED_STRING(SVGFEDiffuseLightingElement, SVGNames::inAttr, In1, in1)
40DEFINE_ANIMATED_NUMBER(SVGFEDiffuseLightingElement, SVGNames::diffuseConstantAttr, DiffuseConstant, diffuseConstant)
41DEFINE_ANIMATED_NUMBER(SVGFEDiffuseLightingElement, SVGNames::surfaceScaleAttr, SurfaceScale, surfaceScale)
42DEFINE_ANIMATED_NUMBER_MULTIPLE_WRAPPERS(SVGFEDiffuseLightingElement, SVGNames::kernelUnitLengthAttr, kernelUnitLengthXIdentifier(), KernelUnitLengthX, kernelUnitLengthX)
43DEFINE_ANIMATED_NUMBER_MULTIPLE_WRAPPERS(SVGFEDiffuseLightingElement, SVGNames::kernelUnitLengthAttr, kernelUnitLengthYIdentifier(), KernelUnitLengthY, kernelUnitLengthY)
44
45BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGFEDiffuseLightingElement)
46    REGISTER_LOCAL_ANIMATED_PROPERTY(in1)
47    REGISTER_LOCAL_ANIMATED_PROPERTY(diffuseConstant)
48    REGISTER_LOCAL_ANIMATED_PROPERTY(surfaceScale)
49    REGISTER_LOCAL_ANIMATED_PROPERTY(kernelUnitLengthX)
50    REGISTER_LOCAL_ANIMATED_PROPERTY(kernelUnitLengthY)
51    REGISTER_PARENT_ANIMATED_PROPERTIES(SVGFilterPrimitiveStandardAttributes)
52END_REGISTER_ANIMATED_PROPERTIES
53
54inline SVGFEDiffuseLightingElement::SVGFEDiffuseLightingElement(const QualifiedName& tagName, Document* document)
55    : SVGFilterPrimitiveStandardAttributes(tagName, document)
56    , m_diffuseConstant(1)
57    , m_surfaceScale(1)
58{
59    ASSERT(hasTagName(SVGNames::feDiffuseLightingTag));
60    registerAnimatedPropertiesForSVGFEDiffuseLightingElement();
61}
62
63PassRefPtr<SVGFEDiffuseLightingElement> SVGFEDiffuseLightingElement::create(const QualifiedName& tagName, Document* document)
64{
65    return adoptRef(new SVGFEDiffuseLightingElement(tagName, document));
66}
67
68const AtomicString& SVGFEDiffuseLightingElement::kernelUnitLengthXIdentifier()
69{
70    DEFINE_STATIC_LOCAL(AtomicString, s_identifier, ("SVGKernelUnitLengthX", AtomicString::ConstructFromLiteral));
71    return s_identifier;
72}
73
74const AtomicString& SVGFEDiffuseLightingElement::kernelUnitLengthYIdentifier()
75{
76    DEFINE_STATIC_LOCAL(AtomicString, s_identifier, ("SVGKernelUnitLengthY", AtomicString::ConstructFromLiteral));
77    return s_identifier;
78}
79
80bool SVGFEDiffuseLightingElement::isSupportedAttribute(const QualifiedName& attrName)
81{
82    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
83    if (supportedAttributes.isEmpty()) {
84        supportedAttributes.add(SVGNames::inAttr);
85        supportedAttributes.add(SVGNames::diffuseConstantAttr);
86        supportedAttributes.add(SVGNames::surfaceScaleAttr);
87        supportedAttributes.add(SVGNames::kernelUnitLengthAttr);
88        supportedAttributes.add(SVGNames::lighting_colorAttr); // Even though it's a SVG-CSS property, we override its handling here.
89    }
90    return supportedAttributes.contains<QualifiedName, SVGAttributeHashTranslator>(attrName);
91}
92
93void SVGFEDiffuseLightingElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
94{
95    if (!isSupportedAttribute(name) || name == SVGNames::lighting_colorAttr) {
96        SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
97        return;
98    }
99
100    if (name == SVGNames::inAttr) {
101        setIn1BaseValue(value);
102        return;
103    }
104
105    if (name == SVGNames::surfaceScaleAttr) {
106        setSurfaceScaleBaseValue(value.toFloat());
107        return;
108    }
109
110    if (name == SVGNames::diffuseConstantAttr) {
111        setDiffuseConstantBaseValue(value.toFloat());
112        return;
113    }
114
115    if (name == SVGNames::kernelUnitLengthAttr) {
116        float x, y;
117        if (parseNumberOptionalNumber(value, x, y)) {
118            setKernelUnitLengthXBaseValue(x);
119            setKernelUnitLengthYBaseValue(y);
120        }
121        return;
122    }
123
124    ASSERT_NOT_REACHED();
125}
126
127bool SVGFEDiffuseLightingElement::setFilterEffectAttribute(FilterEffect* effect, const QualifiedName& attrName)
128{
129    FEDiffuseLighting* diffuseLighting = static_cast<FEDiffuseLighting*>(effect);
130
131    if (attrName == SVGNames::lighting_colorAttr) {
132        RenderObject* renderer = this->renderer();
133        ASSERT(renderer);
134        ASSERT(renderer->style());
135        return diffuseLighting->setLightingColor(renderer->style()->svgStyle()->lightingColor());
136    }
137    if (attrName == SVGNames::surfaceScaleAttr)
138        return diffuseLighting->setSurfaceScale(surfaceScale());
139    if (attrName == SVGNames::diffuseConstantAttr)
140        return diffuseLighting->setDiffuseConstant(diffuseConstant());
141
142    LightSource* lightSource = const_cast<LightSource*>(diffuseLighting->lightSource());
143    const SVGFELightElement* lightElement = SVGFELightElement::findLightElement(this);
144    ASSERT(lightSource);
145    ASSERT(lightElement);
146
147    if (attrName == SVGNames::azimuthAttr)
148        return lightSource->setAzimuth(lightElement->azimuth());
149    if (attrName == SVGNames::elevationAttr)
150        return lightSource->setElevation(lightElement->elevation());
151    if (attrName == SVGNames::xAttr)
152        return lightSource->setX(lightElement->x());
153    if (attrName == SVGNames::yAttr)
154        return lightSource->setY(lightElement->y());
155    if (attrName == SVGNames::zAttr)
156        return lightSource->setZ(lightElement->z());
157    if (attrName == SVGNames::pointsAtXAttr)
158        return lightSource->setPointsAtX(lightElement->pointsAtX());
159    if (attrName == SVGNames::pointsAtYAttr)
160        return lightSource->setPointsAtY(lightElement->pointsAtY());
161    if (attrName == SVGNames::pointsAtZAttr)
162        return lightSource->setPointsAtZ(lightElement->pointsAtZ());
163    if (attrName == SVGNames::specularExponentAttr)
164        return lightSource->setSpecularExponent(lightElement->specularExponent());
165    if (attrName == SVGNames::limitingConeAngleAttr)
166        return lightSource->setLimitingConeAngle(lightElement->limitingConeAngle());
167
168    ASSERT_NOT_REACHED();
169    return false;
170}
171
172void SVGFEDiffuseLightingElement::svgAttributeChanged(const QualifiedName& attrName)
173{
174    if (!isSupportedAttribute(attrName)) {
175        SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
176        return;
177    }
178
179    SVGElementInstance::InvalidationGuard invalidationGuard(this);
180
181    if (attrName == SVGNames::surfaceScaleAttr
182        || attrName == SVGNames::diffuseConstantAttr
183        || attrName == SVGNames::kernelUnitLengthAttr
184        || attrName == SVGNames::lighting_colorAttr) {
185        primitiveAttributeChanged(attrName);
186        return;
187    }
188
189    if (attrName == SVGNames::inAttr) {
190        invalidate();
191        return;
192    }
193
194    ASSERT_NOT_REACHED();
195}
196
197void SVGFEDiffuseLightingElement::lightElementAttributeChanged(const SVGFELightElement* lightElement, const QualifiedName& attrName)
198{
199    if (SVGFELightElement::findLightElement(this) != lightElement)
200        return;
201
202    // The light element has different attribute names.
203    primitiveAttributeChanged(attrName);
204}
205
206PassRefPtr<FilterEffect> SVGFEDiffuseLightingElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
207{
208    FilterEffect* input1 = filterBuilder->getEffectById(in1());
209
210    if (!input1)
211        return 0;
212
213    RefPtr<LightSource> lightSource = SVGFELightElement::findLightSource(this);
214    if (!lightSource)
215        return 0;
216
217    RenderObject* renderer = this->renderer();
218    if (!renderer)
219        return 0;
220
221    ASSERT(renderer->style());
222    Color color = renderer->style()->svgStyle()->lightingColor();
223
224    RefPtr<FilterEffect> effect = FEDiffuseLighting::create(filter, color, surfaceScale(), diffuseConstant(),
225                                                                kernelUnitLengthX(), kernelUnitLengthY(), lightSource.release());
226    effect->inputEffects().append(input1);
227    return effect.release();
228}
229
230}
231
232#endif // ENABLE(SVG)
233