code.vuplus.com Git - vuplus_webkit/blob - Source/WebCore/svg/SVGFEComponentTransferElement.cpp

   1 /*
   2  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
   3  * Copyright (C) 2004, 2005 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 #if ENABLE(SVG) && ENABLE(FILTERS)
  24 #include "SVGFEComponentTransferElement.h"
  25
  26 #include "Attr.h"
  27 #include "FilterEffect.h"
  28 #include "SVGFEFuncAElement.h"
  29 #include "SVGFEFuncBElement.h"
  30 #include "SVGFEFuncGElement.h"
  31 #include "SVGFEFuncRElement.h"
  32 #include "SVGFilterBuilder.h"
  33 #include "SVGNames.h"
  34
  35 namespace WebCore {
  36
  37 // Animated property definitions
  38 DEFINE_ANIMATED_STRING(SVGFEComponentTransferElement, SVGNames::inAttr, In1, in1)
  39
  40 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGFEComponentTransferElement)
  41     REGISTER_LOCAL_ANIMATED_PROPERTY(in1)
  42     REGISTER_PARENT_ANIMATED_PROPERTIES(SVGFilterPrimitiveStandardAttributes)
  43 END_REGISTER_ANIMATED_PROPERTIES
  44
  45 inline SVGFEComponentTransferElement::SVGFEComponentTransferElement(const QualifiedName& tagName, Document* document)
  46     : SVGFilterPrimitiveStandardAttributes(tagName, document)
  47 {
  48     ASSERT(hasTagName(SVGNames::feComponentTransferTag));
  49     registerAnimatedPropertiesForSVGFEComponentTransferElement();
  50 }
  51
  52 PassRefPtr<SVGFEComponentTransferElement> SVGFEComponentTransferElement::create(const QualifiedName& tagName, Document* document)
  53 {
  54     return adoptRef(new SVGFEComponentTransferElement(tagName, document));
  55 }
  56
  57 bool SVGFEComponentTransferElement::isSupportedAttribute(const QualifiedName& attrName)
  58 {
  59     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
  60     if (supportedAttributes.isEmpty())
  61         supportedAttributes.add(SVGNames::inAttr);
  62     return supportedAttributes.contains(attrName);
  63 }
  64
  65 void SVGFEComponentTransferElement::parseMappedAttribute(Attribute* attr)
  66 {
  67     if (!isSupportedAttribute(attr->name())) {
  68         SVGFilterPrimitiveStandardAttributes::parseMappedAttribute(attr);
  69         return;
  70     }
  71
  72     const AtomicString& value = attr->value();
  73     if (attr->name() == SVGNames::inAttr) {
  74         setIn1BaseValue(value);
  75         return;
  76     }
  77
  78     ASSERT_NOT_REACHED();
  79 }
  80
  81 PassRefPtr<FilterEffect> SVGFEComponentTransferElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
  82 {
  83     FilterEffect* input1 = filterBuilder->getEffectById(in1());
  84
  85     if (!input1)
  86         return 0;
  87
  88     ComponentTransferFunction red;
  89     ComponentTransferFunction green;
  90     ComponentTransferFunction blue;
  91     ComponentTransferFunction alpha;
  92
  93     for (Node* node = firstChild(); node; node = node->nextSibling()) {
  94         if (node->hasTagName(SVGNames::feFuncRTag))
  95             red = static_cast<SVGFEFuncRElement*>(node)->transferFunction();
  96         else if (node->hasTagName(SVGNames::feFuncGTag))
  97             green = static_cast<SVGFEFuncGElement*>(node)->transferFunction();
  98         else if (node->hasTagName(SVGNames::feFuncBTag))
  99            blue = static_cast<SVGFEFuncBElement*>(node)->transferFunction();
 100         else if (node->hasTagName(SVGNames::feFuncATag))
 101             alpha = static_cast<SVGFEFuncAElement*>(node)->transferFunction();
 102     }
 103
 104     RefPtr<FilterEffect> effect = FEComponentTransfer::create(filter, red, green, blue, alpha);
 105     effect->inputEffects().append(input1);
 106     return effect.release();
 107 }
 108
 109 }
 110
 111 #endif