Home | History | Annotate | Download | only in svg 
      1 /*
      2  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005 Rob Buis <buis (at) 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/SVGFEOffsetElement.h"
     24 
     25 #include "core/SVGNames.h"
     26 #include "platform/graphics/filters/FilterEffect.h"
     27 #include "core/svg/graphics/filters/SVGFilterBuilder.h"
     28 
     29 namespace blink {
     30 
     31 inline SVGFEOffsetElement::SVGFEOffsetElement(Document& document)
     32     : SVGFilterPrimitiveStandardAttributes(SVGNames::feOffsetTag, document)
     33     , m_dx(SVGAnimatedNumber::create(this, SVGNames::dxAttr, SVGNumber::create()))
     34     , m_dy(SVGAnimatedNumber::create(this, SVGNames::dyAttr, SVGNumber::create()))
     35     , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
     36 {
     37     addToPropertyMap(m_dx);
     38     addToPropertyMap(m_dy);
     39     addToPropertyMap(m_in1);
     40 }
     41 
     42 DEFINE_NODE_FACTORY(SVGFEOffsetElement)
     43 
     44 bool SVGFEOffsetElement::isSupportedAttribute(const QualifiedName& attrName)
     45 {
     46     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     47     if (supportedAttributes.isEmpty()) {
     48         supportedAttributes.add(SVGNames::inAttr);
     49         supportedAttributes.add(SVGNames::dxAttr);
     50         supportedAttributes.add(SVGNames::dyAttr);
     51     }
     52     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
     53 }
     54 
     55 void SVGFEOffsetElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     56 {
     57     if (!isSupportedAttribute(name)) {
     58         SVGFilterPrimitiveStandardAttributes::parseAttribute(name, value);
     59         return;
     60     }
     61 
     62     SVGParsingError parseError = NoError;
     63 
     64     if (name == SVGNames::inAttr)
     65         m_in1->setBaseValueAsString(value, parseError);
     66     else if (name == SVGNames::dxAttr)
     67         m_dx->setBaseValueAsString(value, parseError);
     68     else if (name == SVGNames::dyAttr)
     69         m_dy->setBaseValueAsString(value, parseError);
     70     else
     71         ASSERT_NOT_REACHED();
     72 
     73     reportAttributeParsingError(parseError, name, value);
     74 }
     75 
     76 void SVGFEOffsetElement::svgAttributeChanged(const QualifiedName& attrName)
     77 {
     78     if (!isSupportedAttribute(attrName)) {
     79         SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(attrName);
     80         return;
     81     }
     82 
     83     SVGElement::InvalidationGuard invalidationGuard(this);
     84 
     85     if (attrName == SVGNames::inAttr || attrName == SVGNames::dxAttr || attrName == SVGNames::dyAttr) {
     86         invalidate();
     87         return;
     88     }
     89 
     90     ASSERT_NOT_REACHED();
     91 }
     92 
     93 PassRefPtr<FilterEffect> SVGFEOffsetElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
     94 {
     95     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
     96 
     97     if (!input1)
     98         return nullptr;
     99 
    100     RefPtr<FilterEffect> effect = FEOffset::create(filter, m_dx->currentValue()->value(), m_dy->currentValue()->value());
    101     effect->inputEffects().append(input1);
    102     return effect.release();
    103 }
    104 
    105 } // namespace blink
    106