1/*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006 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#include "SVGFEMergeElement.h"
23
24#include "ElementIterator.h"
25#include "FEMerge.h"
26#include "FilterEffect.h"
27#include "SVGFEMergeNodeElement.h"
28#include "SVGFilterBuilder.h"
29#include "SVGNames.h"
30#include <wtf/IsoMallocInlines.h>
31
32namespace WebCore {
33
34WTF_MAKE_ISO_ALLOCATED_IMPL(SVGFEMergeElement);
35
36inline SVGFEMergeElement::SVGFEMergeElement(const QualifiedName& tagName, Document& document)
37 : SVGFilterPrimitiveStandardAttributes(tagName, document)
38{
39 ASSERT(hasTagName(SVGNames::feMergeTag));
40}
41
42Ref<SVGFEMergeElement> SVGFEMergeElement::create(const QualifiedName& tagName, Document& document)
43{
44 return adoptRef(*new SVGFEMergeElement(tagName, document));
45}
46
47RefPtr<FilterEffect> SVGFEMergeElement::build(SVGFilterBuilder* filterBuilder, Filter& filter) const
48{
49 auto effect = FEMerge::create(filter);
50 FilterEffectVector& mergeInputs = effect->inputEffects();
51
52 for (auto& mergeNode : childrenOfType<SVGFEMergeNodeElement>(*this)) {
53 auto mergeEffect = filterBuilder->getEffectById(mergeNode.in1());
54 if (!mergeEffect)
55 return nullptr;
56 mergeInputs.append(WTFMove(mergeEffect));
57 }
58
59 if (mergeInputs.isEmpty())
60 return nullptr;
61
62 return effect;
63}
64
65}
66