1/*
2 * Copyright (C) Research In Motion Limited 2011. All rights reserved.
3 * Copyright (C) 2018-2019 Apple Inc. All rights reserved.
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 "SVGFEDropShadowElement.h"
23
24#include "RenderStyle.h"
25#include "SVGFilterBuilder.h"
26#include "SVGNames.h"
27#include "SVGParserUtilities.h"
28#include "SVGRenderStyle.h"
29#include <wtf/IsoMallocInlines.h>
30
31namespace WebCore {
32
33WTF_MAKE_ISO_ALLOCATED_IMPL(SVGFEDropShadowElement);
34
35inline SVGFEDropShadowElement::SVGFEDropShadowElement(const QualifiedName& tagName, Document& document)
36 : SVGFilterPrimitiveStandardAttributes(tagName, document)
37{
38 ASSERT(hasTagName(SVGNames::feDropShadowTag));
39
40 static std::once_flag onceFlag;
41 std::call_once(onceFlag, [] {
42 PropertyRegistry::registerProperty<SVGNames::inAttr, &SVGFEDropShadowElement::m_in1>();
43 PropertyRegistry::registerProperty<SVGNames::dxAttr, &SVGFEDropShadowElement::m_dx>();
44 PropertyRegistry::registerProperty<SVGNames::dyAttr, &SVGFEDropShadowElement::m_dy>();
45 PropertyRegistry::registerProperty<SVGNames::stdDeviationAttr, &SVGFEDropShadowElement::m_stdDeviationX, &SVGFEDropShadowElement::m_stdDeviationY>();
46 });
47}
48
49Ref<SVGFEDropShadowElement> SVGFEDropShadowElement::create(const QualifiedName& tagName, Document& document)
50{
51 return adoptRef(*new SVGFEDropShadowElement(tagName, document));
52}
53
54void SVGFEDropShadowElement::setStdDeviation(float x, float y)
55{
56 m_stdDeviationX->setBaseValInternal(x);
57 m_stdDeviationY->setBaseValInternal(y);
58 invalidate();
59}
60
61void SVGFEDropShadowElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
62{
63 if (name == SVGNames::stdDeviationAttr) {
64 float x, y;
65 if (parseNumberOptionalNumber(value, x, y)) {
66 m_stdDeviationX->setBaseValInternal(x);
67 m_stdDeviationY->setBaseValInternal(y);
68 }
69 return;
70 }
71
72 if (name == SVGNames::inAttr) {
73 m_in1->setBaseValInternal(value);
74 return;
75 }
76
77 if (name == SVGNames::dxAttr) {
78 m_dx->setBaseValInternal(value.toFloat());
79 return;
80 }
81
82 if (name == SVGNames::dyAttr) {
83 m_dy->setBaseValInternal(value.toFloat());
84 return;
85 }
86
87 SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
88}
89
90void SVGFEDropShadowElement::svgAttributeChanged(const QualifiedName& attrName)
91{
92 if (PropertyRegistry::isKnownAttribute(attrName)) {
93 InstanceInvalidationGuard guard(*this);
94 invalidate();
95 return;
96 }
97
98 SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
99}
100
101RefPtr<FilterEffect> SVGFEDropShadowElement::build(SVGFilterBuilder* filterBuilder, Filter& filter) const
102{
103 RenderObject* renderer = this->renderer();
104 if (!renderer)
105 return nullptr;
106
107 if (stdDeviationX() < 0 || stdDeviationY() < 0)
108 return nullptr;
109
110 const SVGRenderStyle& svgStyle = renderer->style().svgStyle();
111
112 Color color = renderer->style().colorByApplyingColorFilter(svgStyle.floodColor());
113 float opacity = svgStyle.floodOpacity();
114
115 auto input1 = filterBuilder->getEffectById(in1());
116 if (!input1)
117 return nullptr;
118
119 auto effect = FEDropShadow::create(filter, stdDeviationX(), stdDeviationY(), dx(), dy(), color, opacity);
120 effect->inputEffects().append(input1);
121 return effect;
122}
123
124}
125