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      1 /*
      2  Copyright (C) 2006 Oliver Hunt <oliver (at) nerget.com>
      3 
      4  This library is free software; you can redistribute it and/or
      5  modify it under the terms of the GNU Library General Public
      6  License as published by the Free Software Foundation; either
      7  version 2 of the License, or (at your option) any later version.
      8 
      9  This library is distributed in the hope that it will be useful,
     10  but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  Library General Public License for more details.
     13 
     14  You should have received a copy of the GNU Library General Public License
     15  along with this library; see the file COPYING.LIB.  If not, write to
     16  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #include "config.h"
     21 
     22 #if ENABLE(SVG) && ENABLE(FILTERS)
     23 #include "SVGFEDisplacementMapElement.h"
     24 
     25 #include "MappedAttribute.h"
     26 #include "SVGResourceFilter.h"
     27 
     28 namespace WebCore {
     29 
     30 SVGFEDisplacementMapElement::SVGFEDisplacementMapElement(const QualifiedName& tagName, Document* doc)
     31     : SVGFilterPrimitiveStandardAttributes(tagName, doc)
     32     , m_xChannelSelector(CHANNEL_A)
     33     , m_yChannelSelector(CHANNEL_A)
     34 {
     35 }
     36 
     37 SVGFEDisplacementMapElement::~SVGFEDisplacementMapElement()
     38 {
     39 }
     40 
     41 ChannelSelectorType SVGFEDisplacementMapElement::stringToChannel(const String& key)
     42 {
     43     if (key == "R")
     44         return CHANNEL_R;
     45     else if (key == "G")
     46         return CHANNEL_G;
     47     else if (key == "B")
     48         return CHANNEL_B;
     49     else if (key == "A")
     50         return CHANNEL_A;
     51 
     52     return CHANNEL_UNKNOWN;
     53 }
     54 
     55 void SVGFEDisplacementMapElement::parseMappedAttribute(MappedAttribute* attr)
     56 {
     57     const String& value = attr->value();
     58     if (attr->name() == SVGNames::xChannelSelectorAttr)
     59         setXChannelSelectorBaseValue(stringToChannel(value));
     60     else if (attr->name() == SVGNames::yChannelSelectorAttr)
     61         setYChannelSelectorBaseValue(stringToChannel(value));
     62     else if (attr->name() == SVGNames::inAttr)
     63         setIn1BaseValue(value);
     64     else if (attr->name() == SVGNames::in2Attr)
     65         setIn2BaseValue(value);
     66     else if (attr->name() == SVGNames::scaleAttr)
     67         setScaleBaseValue(value.toFloat());
     68     else
     69         SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
     70 }
     71 
     72 void SVGFEDisplacementMapElement::synchronizeProperty(const QualifiedName& attrName)
     73 {
     74     SVGFilterPrimitiveStandardAttributes::synchronizeProperty(attrName);
     75 
     76     if (attrName == anyQName()) {
     77         synchronizeXChannelSelector();
     78         synchronizeYChannelSelector();
     79         synchronizeIn1();
     80         synchronizeIn2();
     81         synchronizeScale();
     82         return;
     83     }
     84 
     85     if (attrName == SVGNames::xChannelSelectorAttr)
     86         synchronizeXChannelSelector();
     87     else if (attrName == SVGNames::yChannelSelectorAttr)
     88         synchronizeYChannelSelector();
     89     else if (attrName == SVGNames::inAttr)
     90         synchronizeIn1();
     91     else if (attrName == SVGNames::in2Attr)
     92         synchronizeIn2();
     93     else if (attrName == SVGNames::scaleAttr)
     94         synchronizeScale();
     95 }
     96 
     97 bool SVGFEDisplacementMapElement::build(SVGResourceFilter* filterResource)
     98 {
     99     FilterEffect* input1 = filterResource->builder()->getEffectById(in1());
    100     FilterEffect* input2 = filterResource->builder()->getEffectById(in2());
    101 
    102     if (!input1 || !input2)
    103         return false;
    104 
    105 
    106     RefPtr<FilterEffect> effect = FEDisplacementMap::create(input1, input2, static_cast<ChannelSelectorType>(xChannelSelector()),
    107                                         static_cast<ChannelSelectorType>(yChannelSelector()), scale());
    108     filterResource->addFilterEffect(this, effect.release());
    109 
    110     return true;
    111 }
    112 
    113 }
    114 
    115 #endif // ENABLE(SVG)
    116 
    117 // vim:ts=4:noet
    118