1/*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4 * Copyright (C) 2018-2019 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#include "config.h"
23#include "SVGFEComponentTransferElement.h"
24
25#include "ElementIterator.h"
26#include "FilterEffect.h"
27#include "SVGFEFuncAElement.h"
28#include "SVGFEFuncBElement.h"
29#include "SVGFEFuncGElement.h"
30#include "SVGFEFuncRElement.h"
31#include "SVGFilterBuilder.h"
32#include "SVGNames.h"
33#include <wtf/IsoMallocInlines.h>
34
35namespace WebCore {
36
37WTF_MAKE_ISO_ALLOCATED_IMPL(SVGFEComponentTransferElement);
38
39inline SVGFEComponentTransferElement::SVGFEComponentTransferElement(const QualifiedName& tagName, Document& document)
40 : SVGFilterPrimitiveStandardAttributes(tagName, document)
41{
42 ASSERT(hasTagName(SVGNames::feComponentTransferTag));
43
44 static std::once_flag onceFlag;
45 std::call_once(onceFlag, [] {
46 PropertyRegistry::registerProperty<SVGNames::inAttr, &SVGFEComponentTransferElement::m_in1>();
47 });
48}
49
50Ref<SVGFEComponentTransferElement> SVGFEComponentTransferElement::create(const QualifiedName& tagName, Document& document)
51{
52 return adoptRef(*new SVGFEComponentTransferElement(tagName, document));
53}
54
55void SVGFEComponentTransferElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
56{
57 if (name == SVGNames::inAttr) {
58 m_in1->setBaseValInternal(value);
59 return;
60 }
61
62 SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
63}
64
65RefPtr<FilterEffect> SVGFEComponentTransferElement::build(SVGFilterBuilder* filterBuilder, Filter& filter) const
66{
67 auto input1 = filterBuilder->getEffectById(in1());
68
69 if (!input1)
70 return nullptr;
71
72 ComponentTransferFunction red;
73 ComponentTransferFunction green;
74 ComponentTransferFunction blue;
75 ComponentTransferFunction alpha;
76
77 for (auto& child : childrenOfType<SVGElement>(*this)) {
78 if (is<SVGFEFuncRElement>(child))
79 red = downcast<SVGFEFuncRElement>(child).transferFunction();
80 else if (is<SVGFEFuncGElement>(child))
81 green = downcast<SVGFEFuncGElement>(child).transferFunction();
82 else if (is<SVGFEFuncBElement>(child))
83 blue = downcast<SVGFEFuncBElement>(child).transferFunction();
84 else if (is<SVGFEFuncAElement>(child))
85 alpha = downcast<SVGFEFuncAElement>(child).transferFunction();
86 }
87
88 auto effect = FEComponentTransfer::create(filter, red, green, blue, alpha);
89 effect->inputEffects().append(input1);
90 return effect;
91}
92
93}
94