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 "MappedAttribute.h"
27 #include "RenderObject.h"
28 #include "SVGColor.h"
29 #include "SVGFEDiffuseLighting.h"
30 #include "SVGFELightElement.h"
31 #include "SVGNames.h"
32 #include "SVGParserUtilities.h"
33 #include "SVGRenderStyle.h"
34 #include "SVGResourceFilter.h"
35
36 namespace WebCore {
37
38 char SVGKernelUnitLengthXIdentifier[] = "SVGKernelUnitLengthX";
39 char SVGKernelUnitLengthYIdentifier[] = "SVGKernelUnitLengthY";
40
SVGFEDiffuseLightingElement(const QualifiedName & tagName,Document * doc)41 SVGFEDiffuseLightingElement::SVGFEDiffuseLightingElement(const QualifiedName& tagName, Document* doc)
42 : SVGFilterPrimitiveStandardAttributes(tagName, doc)
43 , m_diffuseConstant(1.0f)
44 , m_surfaceScale(1.0f)
45 {
46 }
47
~SVGFEDiffuseLightingElement()48 SVGFEDiffuseLightingElement::~SVGFEDiffuseLightingElement()
49 {
50 }
51
parseMappedAttribute(MappedAttribute * attr)52 void SVGFEDiffuseLightingElement::parseMappedAttribute(MappedAttribute *attr)
53 {
54 const String& value = attr->value();
55 if (attr->name() == SVGNames::inAttr)
56 setIn1BaseValue(value);
57 else if (attr->name() == SVGNames::surfaceScaleAttr)
58 setSurfaceScaleBaseValue(value.toFloat());
59 else if (attr->name() == SVGNames::diffuseConstantAttr)
60 setDiffuseConstantBaseValue(value.toInt());
61 else if (attr->name() == SVGNames::kernelUnitLengthAttr) {
62 float x, y;
63 if (parseNumberOptionalNumber(value, x, y)) {
64 setKernelUnitLengthXBaseValue(x);
65 setKernelUnitLengthYBaseValue(y);
66 }
67 } else
68 SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
69 }
70
synchronizeProperty(const QualifiedName & attrName)71 void SVGFEDiffuseLightingElement::synchronizeProperty(const QualifiedName& attrName)
72 {
73 SVGFilterPrimitiveStandardAttributes::synchronizeProperty(attrName);
74
75 if (attrName == anyQName()) {
76 synchronizeIn1();
77 synchronizeSurfaceScale();
78 synchronizeDiffuseConstant();
79 synchronizeKernelUnitLengthX();
80 synchronizeKernelUnitLengthY();
81 return;
82 }
83
84 if (attrName == SVGNames::inAttr)
85 synchronizeIn1();
86 else if (attrName == SVGNames::surfaceScaleAttr)
87 synchronizeSurfaceScale();
88 else if (attrName == SVGNames::diffuseConstantAttr)
89 synchronizeDiffuseConstant();
90 else if (attrName == SVGNames::kernelUnitLengthAttr) {
91 synchronizeKernelUnitLengthX();
92 synchronizeKernelUnitLengthY();
93 }
94 }
95
build(SVGResourceFilter * filterResource)96 bool SVGFEDiffuseLightingElement::build(SVGResourceFilter* filterResource)
97 {
98 FilterEffect* input1 = filterResource->builder()->getEffectById(in1());
99
100 if (!input1)
101 return false;
102
103 RefPtr<RenderStyle> filterStyle = styleForRenderer();
104 Color color = filterStyle->svgStyle()->lightingColor();
105
106 RefPtr<FilterEffect> effect = FEDiffuseLighting::create(input1, color, surfaceScale(), diffuseConstant(),
107 kernelUnitLengthX(), kernelUnitLengthY(), findLights());
108 filterResource->addFilterEffect(this, effect.release());
109
110 return true;
111 }
112
findLights() const113 PassRefPtr<LightSource> SVGFEDiffuseLightingElement::findLights() const
114 {
115 for (Node* n = firstChild(); n; n = n->nextSibling()) {
116 if (n->hasTagName(SVGNames::feDistantLightTag) ||
117 n->hasTagName(SVGNames::fePointLightTag) ||
118 n->hasTagName(SVGNames::feSpotLightTag)) {
119 SVGFELightElement* lightNode = static_cast<SVGFELightElement*>(n);
120 return lightNode->lightSource();
121 }
122 }
123
124 return 0;
125 }
126
127 }
128
129 #endif // ENABLE(SVG)
130