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
23#include "core/svg/SVGFEGaussianBlurElement.h"
24
25#include "core/SVGNames.h"
26#include "platform/graphics/filters/FilterEffect.h"
27#include "core/svg/SVGParserUtilities.h"
28#include "core/svg/graphics/filters/SVGFilterBuilder.h"
29
30namespace blink {
31
32inline SVGFEGaussianBlurElement::SVGFEGaussianBlurElement(Document& document)
33    : SVGFilterPrimitiveStandardAttributes(SVGNames::feGaussianBlurTag, document)
34    , m_stdDeviation(SVGAnimatedNumberOptionalNumber::create(this, SVGNames::stdDeviationAttr, 0, 0))
35    , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
36{
37    addToPropertyMap(m_stdDeviation);
38    addToPropertyMap(m_in1);
39}
40
41DEFINE_NODE_FACTORY(SVGFEGaussianBlurElement)
42
43void SVGFEGaussianBlurElement::setStdDeviation(float x, float y)
44{
45    stdDeviationX()->baseValue()->setValue(x);
46    stdDeviationY()->baseValue()->setValue(y);
47    invalidate();
48}
49
50bool SVGFEGaussianBlurElement::isSupportedAttribute(const QualifiedName& attrName)
51{
52    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
53    if (supportedAttributes.isEmpty()) {
54        supportedAttributes.add(SVGNames::inAttr);
55        supportedAttributes.add(SVGNames::stdDeviationAttr);
56    }
57    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
58}
59
60void SVGFEGaussianBlurElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
61{
62    parseAttributeNew(name, value);
63}
64
65void SVGFEGaussianBlurElement::svgAttributeChanged(const QualifiedName& attrName)
66{
67    if (!isSupportedAttribute(attrName)) {
68        SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
69        return;
70    }
71
72    SVGElement::InvalidationGuard invalidationGuard(this);
73
74    if (attrName == SVGNames::inAttr || attrName == SVGNames::stdDeviationAttr) {
75        invalidate();
76        return;
77    }
78
79    ASSERT_NOT_REACHED();
80}
81
82PassRefPtr<FilterEffect> SVGFEGaussianBlurElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
83{
84    FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
85
86    if (!input1)
87        return nullptr;
88
89    if (stdDeviationX()->currentValue()->value() < 0 || stdDeviationY()->currentValue()->value() < 0)
90        return nullptr;
91
92    RefPtr<FilterEffect> effect = FEGaussianBlur::create(filter, stdDeviationX()->currentValue()->value(), stdDeviationY()->currentValue()->value());
93    effect->inputEffects().append(input1);
94    return effect.release();
95}
96
97} // namespace blink
98