src/third_party/WebKit/Source/core/svg/SVGFEBlendElement.cpp

   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/SVGFEBlendElement.h"
  24
  25 #include "core/SVGNames.h"
  26 #include "platform/graphics/filters/FEBlend.h"
  27 #include "platform/graphics/filters/FilterEffect.h"
  28 #include "core/svg/graphics/filters/SVGFilterBuilder.h"
  29
  30 namespace blink {
  31
  32 static WebBlendMode toWebBlendMode(SVGFEBlendElement::Mode mode)
  33 {
  34 #define MAP_BLEND_MODE(MODENAME)            \
  35     case SVGFEBlendElement::Mode##MODENAME: \
  36         return WebBlendMode##MODENAME
  37
  38     switch (mode) {
  39         MAP_BLEND_MODE(Normal);
  40         MAP_BLEND_MODE(Multiply);
  41         MAP_BLEND_MODE(Screen);
  42         MAP_BLEND_MODE(Darken);
  43         MAP_BLEND_MODE(Lighten);
  44         MAP_BLEND_MODE(Overlay);
  45         MAP_BLEND_MODE(ColorDodge);
  46         MAP_BLEND_MODE(ColorBurn);
  47         MAP_BLEND_MODE(HardLight);
  48         MAP_BLEND_MODE(SoftLight);
  49         MAP_BLEND_MODE(Difference);
  50         MAP_BLEND_MODE(Exclusion);
  51         MAP_BLEND_MODE(Hue);
  52         MAP_BLEND_MODE(Saturation);
  53         MAP_BLEND_MODE(Color);
  54         MAP_BLEND_MODE(Luminosity);
  55     default:
  56         ASSERT_NOT_REACHED();
  57         return WebBlendModeNormal;
  58     }
  59 #undef MAP_BLEND_MODE
  60 }
  61
  62 template<> const SVGEnumerationStringEntries& getStaticStringEntries<SVGFEBlendElement::Mode>()
  63 {
  64     DEFINE_STATIC_LOCAL(SVGEnumerationStringEntries, entries, ());
  65     if (entries.isEmpty()) {
  66         entries.append(std::make_pair(SVGFEBlendElement::ModeNormal, "normal"));
  67         entries.append(std::make_pair(SVGFEBlendElement::ModeMultiply, "multiply"));
  68         entries.append(std::make_pair(SVGFEBlendElement::ModeScreen, "screen"));
  69         entries.append(std::make_pair(SVGFEBlendElement::ModeDarken, "darken"));
  70         entries.append(std::make_pair(SVGFEBlendElement::ModeLighten, "lighten"));
  71         entries.append(std::make_pair(SVGFEBlendElement::ModeOverlay, "overlay"));
  72         entries.append(std::make_pair(SVGFEBlendElement::ModeColorDodge, "color-dodge"));
  73         entries.append(std::make_pair(SVGFEBlendElement::ModeColorBurn, "color-burn"));
  74         entries.append(std::make_pair(SVGFEBlendElement::ModeHardLight, "hard-light"));
  75         entries.append(std::make_pair(SVGFEBlendElement::ModeSoftLight, "soft-light"));
  76         entries.append(std::make_pair(SVGFEBlendElement::ModeDifference, "difference"));
  77         entries.append(std::make_pair(SVGFEBlendElement::ModeExclusion, "exclusion"));
  78         entries.append(std::make_pair(SVGFEBlendElement::ModeHue, "hue"));
  79         entries.append(std::make_pair(SVGFEBlendElement::ModeSaturation, "saturation"));
  80         entries.append(std::make_pair(SVGFEBlendElement::ModeColor, "color"));
  81         entries.append(std::make_pair(SVGFEBlendElement::ModeLuminosity, "luminosity"));
  82     }
  83     return entries;
  84 }
  85
  86 template<> unsigned short getMaxExposedEnumValue<SVGFEBlendElement::Mode>()
  87 {
  88     return SVGFEBlendElement::ModeLighten;
  89 }
  90
  91 inline SVGFEBlendElement::SVGFEBlendElement(Document& document)
  92     : SVGFilterPrimitiveStandardAttributes(SVGNames::feBlendTag, document)
  93     , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
  94     , m_in2(SVGAnimatedString::create(this, SVGNames::in2Attr, SVGString::create()))
  95     , m_mode(SVGAnimatedEnumeration<Mode>::create(this, SVGNames::modeAttr, SVGFEBlendElement::ModeNormal))
  96 {
  97     addToPropertyMap(m_in1);
  98     addToPropertyMap(m_in2);
  99     addToPropertyMap(m_mode);
 100 }
 101
 102 DEFINE_NODE_FACTORY(SVGFEBlendElement)
 103
 104 bool SVGFEBlendElement::isSupportedAttribute(const QualifiedName& attrName)
 105 {
 106     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
 107     if (supportedAttributes.isEmpty()) {
 108         supportedAttributes.add(SVGNames::modeAttr);
 109         supportedAttributes.add(SVGNames::inAttr);
 110         supportedAttributes.add(SVGNames::in2Attr);
 111     }
 112     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
 113 }
 114
 115 void SVGFEBlendElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 116 {
 117     parseAttributeNew(name, value);
 118 }
 119
 120 bool SVGFEBlendElement::setFilterEffectAttribute(FilterEffect* effect, const QualifiedName& attrName)
 121 {
 122     FEBlend* blend = static_cast<FEBlend*>(effect);
 123     if (attrName == SVGNames::modeAttr)
 124         return blend->setBlendMode(toWebBlendMode(m_mode->currentValue()->enumValue()));
 125
 126     ASSERT_NOT_REACHED();
 127     return false;
 128 }
 129
 130 void SVGFEBlendElement::svgAttributeChanged(const QualifiedName& attrName)
 131 {
 132     if (!isSupportedAttribute(attrName)) {
 133         SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
 134         return;
 135     }
 136
 137     SVGElement::InvalidationGuard invalidationGuard(this);
 138
 139     if (attrName == SVGNames::modeAttr) {
 140         primitiveAttributeChanged(attrName);
 141         return;
 142     }
 143
 144     if (attrName == SVGNames::inAttr || attrName == SVGNames::in2Attr) {
 145         invalidate();
 146         return;
 147     }
 148
 149     ASSERT_NOT_REACHED();
 150 }
 151
 152 PassRefPtr<FilterEffect> SVGFEBlendElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
 153 {
 154     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
 155     FilterEffect* input2 = filterBuilder->getEffectById(AtomicString(m_in2->currentValue()->value()));
 156
 157     if (!input1 || !input2)
 158         return nullptr;
 159
 160     RefPtr<FilterEffect> effect = FEBlend::create(filter, toWebBlendMode(m_mode->currentValue()->enumValue()));
 161     FilterEffectVector& inputEffects = effect->inputEffects();
 162     inputEffects.reserveCapacity(2);
 163     inputEffects.append(input1);
 164     inputEffects.append(input2);
 165     return effect.release();
 166 }
 167
 168 }