1/*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006 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 "SVGFEGaussianBlurElement.h"
24
25#include "FilterEffect.h"
26#include "SVGFilterBuilder.h"
27#include "SVGNames.h"
28#include "SVGParserUtilities.h"
29#include <wtf/IsoMallocInlines.h>
30
31namespace WebCore {
32
33WTF_MAKE_ISO_ALLOCATED_IMPL(SVGFEGaussianBlurElement);
34
35inline SVGFEGaussianBlurElement::SVGFEGaussianBlurElement(const QualifiedName& tagName, Document& document)
36 : SVGFilterPrimitiveStandardAttributes(tagName, document)
37{
38 ASSERT(hasTagName(SVGNames::feGaussianBlurTag));
39
40 static std::once_flag onceFlag;
41 std::call_once(onceFlag, [] {
42 PropertyRegistry::registerProperty<SVGNames::inAttr, &SVGFEGaussianBlurElement::m_in1>();
43 PropertyRegistry::registerProperty<SVGNames::stdDeviationAttr, &SVGFEGaussianBlurElement::m_stdDeviationX, &SVGFEGaussianBlurElement::m_stdDeviationY>();
44 PropertyRegistry::registerProperty<SVGNames::edgeModeAttr, EdgeModeType, &SVGFEGaussianBlurElement::m_edgeMode>();
45 });
46}
47
48Ref<SVGFEGaussianBlurElement> SVGFEGaussianBlurElement::create(const QualifiedName& tagName, Document& document)
49{
50 return adoptRef(*new SVGFEGaussianBlurElement(tagName, document));
51}
52
53void SVGFEGaussianBlurElement::setStdDeviation(float x, float y)
54{
55 m_stdDeviationX->setBaseValInternal(x);
56 m_stdDeviationY->setBaseValInternal(y);
57 invalidate();
58}
59
60void SVGFEGaussianBlurElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
61{
62 if (name == SVGNames::stdDeviationAttr) {
63 float x, y;
64 if (parseNumberOptionalNumber(value, x, y)) {
65 m_stdDeviationX->setBaseValInternal(x);
66 m_stdDeviationY->setBaseValInternal(y);
67 }
68 return;
69 }
70
71 if (name == SVGNames::inAttr) {
72 m_in1->setBaseValInternal(value);
73 return;
74 }
75
76 if (name == SVGNames::edgeModeAttr) {
77 auto propertyValue = SVGPropertyTraits<EdgeModeType>::fromString(value);
78 if (propertyValue > 0)
79 m_edgeMode->setBaseValInternal<EdgeModeType>(propertyValue);
80 else
81 document().accessSVGExtensions().reportWarning("feGaussianBlur: problem parsing edgeMode=\"" + value + "\". Filtered element will not be displayed.");
82 return;
83 }
84
85 SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
86}
87
88void SVGFEGaussianBlurElement::svgAttributeChanged(const QualifiedName& attrName)
89{
90 if (PropertyRegistry::isKnownAttribute(attrName)) {
91 InstanceInvalidationGuard guard(*this);
92 invalidate();
93 return;
94 }
95
96 SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
97}
98
99RefPtr<FilterEffect> SVGFEGaussianBlurElement::build(SVGFilterBuilder* filterBuilder, Filter& filter) const
100{
101 auto input1 = filterBuilder->getEffectById(in1());
102
103 if (!input1)
104 return nullptr;
105
106 if (stdDeviationX() < 0 || stdDeviationY() < 0)
107 return nullptr;
108
109 auto effect = FEGaussianBlur::create(filter, stdDeviationX(), stdDeviationY(), edgeMode());
110 effect->inputEffects().append(input1);
111 return effect;
112}
113
114}
115