1/*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#include "config.h"
22
23#include "core/svg/SVGFEComponentTransferElement.h"
24
25#include "SVGNames.h"
26#include "platform/graphics/filters/FilterEffect.h"
27#include "core/svg/SVGFEFuncAElement.h"
28#include "core/svg/SVGFEFuncBElement.h"
29#include "core/svg/SVGFEFuncGElement.h"
30#include "core/svg/SVGFEFuncRElement.h"
31#include "core/svg/graphics/filters/SVGFilterBuilder.h"
32
33namespace WebCore {
34
35// Animated property definitions
36DEFINE_ANIMATED_STRING(SVGFEComponentTransferElement, SVGNames::inAttr, In1, in1)
37
38BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGFEComponentTransferElement)
39    REGISTER_LOCAL_ANIMATED_PROPERTY(in1)
40    REGISTER_PARENT_ANIMATED_PROPERTIES(SVGFilterPrimitiveStandardAttributes)
41END_REGISTER_ANIMATED_PROPERTIES
42
43inline SVGFEComponentTransferElement::SVGFEComponentTransferElement(Document& document)
44    : SVGFilterPrimitiveStandardAttributes(SVGNames::feComponentTransferTag, document)
45{
46    ScriptWrappable::init(this);
47    registerAnimatedPropertiesForSVGFEComponentTransferElement();
48}
49
50PassRefPtr<SVGFEComponentTransferElement> SVGFEComponentTransferElement::create(Document& document)
51{
52    return adoptRef(new SVGFEComponentTransferElement(document));
53}
54
55bool SVGFEComponentTransferElement::isSupportedAttribute(const QualifiedName& attrName)
56{
57    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
58    if (supportedAttributes.isEmpty())
59        supportedAttributes.add(SVGNames::inAttr);
60    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
61}
62
63void SVGFEComponentTransferElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
64{
65    if (!isSupportedAttribute(name)) {
66        SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
67        return;
68    }
69
70    if (name == SVGNames::inAttr) {
71        setIn1BaseValue(value);
72        return;
73    }
74
75    ASSERT_NOT_REACHED();
76}
77
78PassRefPtr<FilterEffect> SVGFEComponentTransferElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
79{
80    FilterEffect* input1 = filterBuilder->getEffectById(in1CurrentValue());
81
82    if (!input1)
83        return 0;
84
85    ComponentTransferFunction red;
86    ComponentTransferFunction green;
87    ComponentTransferFunction blue;
88    ComponentTransferFunction alpha;
89
90    for (Node* node = firstChild(); node; node = node->nextSibling()) {
91        if (node->hasTagName(SVGNames::feFuncRTag))
92            red = toSVGFEFuncRElement(node)->transferFunction();
93        else if (node->hasTagName(SVGNames::feFuncGTag))
94            green = toSVGFEFuncGElement(node)->transferFunction();
95        else if (node->hasTagName(SVGNames::feFuncBTag))
96            blue = toSVGFEFuncBElement(node)->transferFunction();
97        else if (node->hasTagName(SVGNames::feFuncATag))
98            alpha = toSVGFEFuncAElement(node)->transferFunction();
99    }
100
101    RefPtr<FilterEffect> effect = FEComponentTransfer::create(filter, red, green, blue, alpha);
102    effect->inputEffects().append(input1);
103    return effect.release();
104}
105
106}
107