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/SVGFEColorMatrixElement.h"
24
25#include "core/SVGNames.h"
26#include "platform/graphics/filters/FilterEffect.h"
27#include "core/svg/graphics/filters/SVGFilterBuilder.h"
28
29namespace blink {
30
31template<> const SVGEnumerationStringEntries& getStaticStringEntries<ColorMatrixType>()
32{
33    DEFINE_STATIC_LOCAL(SVGEnumerationStringEntries, entries, ());
34    if (entries.isEmpty()) {
35        entries.append(std::make_pair(FECOLORMATRIX_TYPE_MATRIX, "matrix"));
36        entries.append(std::make_pair(FECOLORMATRIX_TYPE_SATURATE, "saturate"));
37        entries.append(std::make_pair(FECOLORMATRIX_TYPE_HUEROTATE, "hueRotate"));
38        entries.append(std::make_pair(FECOLORMATRIX_TYPE_LUMINANCETOALPHA, "luminanceToAlpha"));
39    }
40    return entries;
41}
42
43inline SVGFEColorMatrixElement::SVGFEColorMatrixElement(Document& document)
44    : SVGFilterPrimitiveStandardAttributes(SVGNames::feColorMatrixTag, document)
45    , m_values(SVGAnimatedNumberList::create(this, SVGNames::valuesAttr, SVGNumberList::create()))
46    , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
47    , m_type(SVGAnimatedEnumeration<ColorMatrixType>::create(this, SVGNames::typeAttr, FECOLORMATRIX_TYPE_MATRIX))
48{
49    addToPropertyMap(m_values);
50    addToPropertyMap(m_in1);
51    addToPropertyMap(m_type);
52}
53
54DEFINE_NODE_FACTORY(SVGFEColorMatrixElement)
55
56bool SVGFEColorMatrixElement::isSupportedAttribute(const QualifiedName& attrName)
57{
58    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
59    if (supportedAttributes.isEmpty()) {
60        supportedAttributes.add(SVGNames::typeAttr);
61        supportedAttributes.add(SVGNames::valuesAttr);
62        supportedAttributes.add(SVGNames::inAttr);
63    }
64    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
65}
66
67void SVGFEColorMatrixElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
68{
69    parseAttributeNew(name, value);
70}
71
72bool SVGFEColorMatrixElement::setFilterEffectAttribute(FilterEffect* effect, const QualifiedName& attrName)
73{
74    FEColorMatrix* colorMatrix = static_cast<FEColorMatrix*>(effect);
75    if (attrName == SVGNames::typeAttr)
76        return colorMatrix->setType(m_type->currentValue()->enumValue());
77    if (attrName == SVGNames::valuesAttr)
78        return colorMatrix->setValues(m_values->currentValue()->toFloatVector());
79
80    ASSERT_NOT_REACHED();
81    return false;
82}
83
84void SVGFEColorMatrixElement::svgAttributeChanged(const QualifiedName& attrName)
85{
86    if (!isSupportedAttribute(attrName)) {
87        SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
88        return;
89    }
90
91    SVGElement::InvalidationGuard invalidationGuard(this);
92
93    if (attrName == SVGNames::typeAttr || attrName == SVGNames::valuesAttr) {
94        primitiveAttributeChanged(attrName);
95        return;
96    }
97
98    if (attrName == SVGNames::inAttr) {
99        invalidate();
100        return;
101    }
102
103    ASSERT_NOT_REACHED();
104}
105
106PassRefPtr<FilterEffect> SVGFEColorMatrixElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
107{
108    FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
109
110    if (!input1)
111        return nullptr;
112
113    Vector<float> filterValues;
114    ColorMatrixType filterType = m_type->currentValue()->enumValue();
115
116    // Use defaults if values is empty (SVG 1.1 15.10).
117    if (!hasAttribute(SVGNames::valuesAttr)) {
118        switch (filterType) {
119        case FECOLORMATRIX_TYPE_MATRIX:
120            for (size_t i = 0; i < 20; i++)
121                filterValues.append((i % 6) ? 0 : 1);
122            break;
123        case FECOLORMATRIX_TYPE_HUEROTATE:
124            filterValues.append(0);
125            break;
126        case FECOLORMATRIX_TYPE_SATURATE:
127            filterValues.append(1);
128            break;
129        default:
130            break;
131        }
132    } else {
133        RefPtr<SVGNumberList> values = m_values->currentValue();
134        size_t size = values->length();
135
136        if ((filterType == FECOLORMATRIX_TYPE_MATRIX && size != 20)
137            || (filterType == FECOLORMATRIX_TYPE_HUEROTATE && size != 1)
138            || (filterType == FECOLORMATRIX_TYPE_SATURATE && size != 1))
139            return nullptr;
140
141        filterValues = values->toFloatVector();
142    }
143
144    RefPtr<FilterEffect> effect = FEColorMatrix::create(filter, filterType, filterValues);
145    effect->inputEffects().append(input1);
146    return effect.release();
147}
148
149} // namespace blink
150