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      1 /*
      2  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006 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/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 
     30 namespace blink {
     31 
     32 inline 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 
     41 DEFINE_NODE_FACTORY(SVGFEGaussianBlurElement)
     42 
     43 void SVGFEGaussianBlurElement::setStdDeviation(float x, float y)
     44 {
     45     stdDeviationX()->baseValue()->setValue(x);
     46     stdDeviationY()->baseValue()->setValue(y);
     47     invalidate();
     48 }
     49 
     50 bool 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 
     60 void SVGFEGaussianBlurElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     61 {
     62     parseAttributeNew(name, value);
     63 }
     64 
     65 void 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 
     82 PassRefPtr<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