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 "core/SVGNames.h"
26#include "core/dom/ElementTraversal.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#include "platform/graphics/filters/FilterEffect.h"
33
34namespace blink {
35
36inline SVGFEComponentTransferElement::SVGFEComponentTransferElement(Document& document)
37    : SVGFilterPrimitiveStandardAttributes(SVGNames::feComponentTransferTag, document)
38    , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
39{
40    addToPropertyMap(m_in1);
41}
42
43DEFINE_NODE_FACTORY(SVGFEComponentTransferElement)
44
45bool SVGFEComponentTransferElement::isSupportedAttribute(const QualifiedName& attrName)
46{
47    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
48    if (supportedAttributes.isEmpty())
49        supportedAttributes.add(SVGNames::inAttr);
50    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
51}
52
53void SVGFEComponentTransferElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
54{
55    if (!isSupportedAttribute(name)) {
56        SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
57        return;
58    }
59
60    SVGParsingError parseError = NoError;
61
62    if (name == SVGNames::inAttr)
63        m_in1->setBaseValueAsString(value, parseError);
64    else
65        ASSERT_NOT_REACHED();
66
67    reportAttributeParsingError(parseError, name, value);
68}
69
70PassRefPtr<FilterEffect> SVGFEComponentTransferElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
71{
72    FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
73
74    if (!input1)
75        return nullptr;
76
77    ComponentTransferFunction red;
78    ComponentTransferFunction green;
79    ComponentTransferFunction blue;
80    ComponentTransferFunction alpha;
81
82    for (SVGElement* element = Traversal<SVGElement>::firstChild(*this); element; element = Traversal<SVGElement>::nextSibling(*element)) {
83        if (isSVGFEFuncRElement(*element))
84            red = toSVGFEFuncRElement(*element).transferFunction();
85        else if (isSVGFEFuncGElement(*element))
86            green = toSVGFEFuncGElement(*element).transferFunction();
87        else if (isSVGFEFuncBElement(*element))
88            blue = toSVGFEFuncBElement(*element).transferFunction();
89        else if (isSVGFEFuncAElement(*element))
90            alpha = toSVGFEFuncAElement(*element).transferFunction();
91    }
92
93    RefPtr<FilterEffect> effect = FEComponentTransfer::create(filter, red, green, blue, alpha);
94    effect->inputEffects().append(input1);
95    return effect.release();
96}
97
98}
99