1 /*
2 Copyright (C) 2006 Oliver Hunt <oliver@nerget.com>
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 "SVGFEDisplacementMapElement.h"
24
25 #include "MappedAttribute.h"
26 #include "SVGResourceFilter.h"
27
28 namespace WebCore {
29
SVGFEDisplacementMapElement(const QualifiedName & tagName,Document * doc)30 SVGFEDisplacementMapElement::SVGFEDisplacementMapElement(const QualifiedName& tagName, Document* doc)
31 : SVGFilterPrimitiveStandardAttributes(tagName, doc)
32 , m_xChannelSelector(CHANNEL_A)
33 , m_yChannelSelector(CHANNEL_A)
34 {
35 }
36
~SVGFEDisplacementMapElement()37 SVGFEDisplacementMapElement::~SVGFEDisplacementMapElement()
38 {
39 }
40
stringToChannel(const String & key)41 ChannelSelectorType SVGFEDisplacementMapElement::stringToChannel(const String& key)
42 {
43 if (key == "R")
44 return CHANNEL_R;
45 else if (key == "G")
46 return CHANNEL_G;
47 else if (key == "B")
48 return CHANNEL_B;
49 else if (key == "A")
50 return CHANNEL_A;
51
52 return CHANNEL_UNKNOWN;
53 }
54
parseMappedAttribute(MappedAttribute * attr)55 void SVGFEDisplacementMapElement::parseMappedAttribute(MappedAttribute* attr)
56 {
57 const String& value = attr->value();
58 if (attr->name() == SVGNames::xChannelSelectorAttr)
59 setXChannelSelectorBaseValue(stringToChannel(value));
60 else if (attr->name() == SVGNames::yChannelSelectorAttr)
61 setYChannelSelectorBaseValue(stringToChannel(value));
62 else if (attr->name() == SVGNames::inAttr)
63 setIn1BaseValue(value);
64 else if (attr->name() == SVGNames::in2Attr)
65 setIn2BaseValue(value);
66 else if (attr->name() == SVGNames::scaleAttr)
67 setScaleBaseValue(value.toFloat());
68 else
69 SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
70 }
71
synchronizeProperty(const QualifiedName & attrName)72 void SVGFEDisplacementMapElement::synchronizeProperty(const QualifiedName& attrName)
73 {
74 SVGFilterPrimitiveStandardAttributes::synchronizeProperty(attrName);
75
76 if (attrName == anyQName()) {
77 synchronizeXChannelSelector();
78 synchronizeYChannelSelector();
79 synchronizeIn1();
80 synchronizeIn2();
81 synchronizeScale();
82 return;
83 }
84
85 if (attrName == SVGNames::xChannelSelectorAttr)
86 synchronizeXChannelSelector();
87 else if (attrName == SVGNames::yChannelSelectorAttr)
88 synchronizeYChannelSelector();
89 else if (attrName == SVGNames::inAttr)
90 synchronizeIn1();
91 else if (attrName == SVGNames::in2Attr)
92 synchronizeIn2();
93 else if (attrName == SVGNames::scaleAttr)
94 synchronizeScale();
95 }
96
build(SVGResourceFilter * filterResource)97 bool SVGFEDisplacementMapElement::build(SVGResourceFilter* filterResource)
98 {
99 FilterEffect* input1 = filterResource->builder()->getEffectById(in1());
100 FilterEffect* input2 = filterResource->builder()->getEffectById(in2());
101
102 if (!input1 || !input2)
103 return false;
104
105
106 RefPtr<FilterEffect> effect = FEDisplacementMap::create(input1, input2, static_cast<ChannelSelectorType>(xChannelSelector()),
107 static_cast<ChannelSelectorType>(yChannelSelector()), scale());
108 filterResource->addFilterEffect(this, effect.release());
109
110 return true;
111 }
112
113 }
114
115 #endif // ENABLE(SVG)
116
117 // vim:ts=4:noet
118