khtml/svg/SVGFilterElement.cpp

   1 /*
   2     Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
   3     Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
   4     Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
   5
   6     This file is part of the KDE project
   7
   8     This library is free software; you can redistribute it and/or
   9     modify it under the terms of the GNU Library General Public
  10     License as published by the Free Software Foundation; either
  11     version 2 of the License, or (at your option) any later version.
  12
  13     This library is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16     Library General Public License for more details.
  17
  18     You should have received a copy of the GNU Library General Public License
  19     along with this library; see the file COPYING.LIB.  If not, write to
  20     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21     Boston, MA 02110-1301, USA.
  22 */
  23
  24 #include "config.h"
  25
  26 #if ENABLE(SVG) && ENABLE(SVG_FILTERS)
  27 #include "SVGFilterElement.h"
  28
  29 #include "Attr.h"
  30 #include "SVGResourceFilter.h"
  31 #include "SVGFilterPrimitiveStandardAttributes.h"
  32 #include "SVGLength.h"
  33 #include "SVGNames.h"
  34 #include "SVGUnitTypes.h"
  35
  36 namespace WebCore {
  37
  38 SVGFilterElement::SVGFilterElement(const QualifiedName& tagName, Document* doc)
  39     : SVGStyledElement(tagName, doc)
  40     , SVGURIReference()
  41     , SVGLangSpace()
  42     , SVGExternalResourcesRequired()
  43     , m_filterUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
  44     , m_primitiveUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
  45     , m_x(this, LengthModeWidth)
  46     , m_y(this, LengthModeHeight)
  47     , m_width(this, LengthModeWidth)
  48     , m_height(this, LengthModeHeight)
  49     , m_filterResX(0)
  50     , m_filterResY(0)
  51 {
  52     // Spec: If the attribute is not specified, the effect is as if a value of "-10%" were specified.
  53     setXBaseValue(SVGLength(this, LengthModeWidth, "-10%"));
  54     setYBaseValue(SVGLength(this, LengthModeHeight, "-10%"));
  55
  56     // Spec: If the attribute is not specified, the effect is as if a value of "120%" were specified.
  57     setWidthBaseValue(SVGLength(this, LengthModeWidth, "120%"));
  58     setHeightBaseValue(SVGLength(this, LengthModeHeight, "120%"));
  59 }
  60
  61 SVGFilterElement::~SVGFilterElement()
  62 {
  63 }
  64
  65 ANIMATED_PROPERTY_DEFINITIONS(SVGFilterElement, int, Enumeration, enumeration, FilterUnits, filterUnits, SVGNames::filterUnitsAttr, m_filterUnits)
  66 ANIMATED_PROPERTY_DEFINITIONS(SVGFilterElement, int, Enumeration, enumeration, PrimitiveUnits, primitiveUnits, SVGNames::primitiveUnitsAttr, m_primitiveUnits)
  67 ANIMATED_PROPERTY_DEFINITIONS(SVGFilterElement, SVGLength, Length, length, X, x, SVGNames::xAttr, m_x)
  68 ANIMATED_PROPERTY_DEFINITIONS(SVGFilterElement, SVGLength, Length, length, Y, y, SVGNames::yAttr, m_y)
  69 ANIMATED_PROPERTY_DEFINITIONS(SVGFilterElement, SVGLength, Length, length, Width, width, SVGNames::widthAttr, m_width)
  70 ANIMATED_PROPERTY_DEFINITIONS(SVGFilterElement, SVGLength, Length, length, Height, height, SVGNames::heightAttr, m_height)
  71 ANIMATED_PROPERTY_DEFINITIONS_WITH_CUSTOM_IDENTIFIER(SVGFilterElement, long, Integer, integer, FilterResX, filterResX, SVGNames::filterResAttr, "filterResX", m_filterResX)
  72 ANIMATED_PROPERTY_DEFINITIONS_WITH_CUSTOM_IDENTIFIER(SVGFilterElement, long, Integer, integer, FilterResY, filterResY, SVGNames::filterResAttr, "filterResY", m_filterResY)
  73
  74 void SVGFilterElement::setFilterRes(unsigned long, unsigned long) const
  75 {
  76 }
  77
  78 void SVGFilterElement::parseMappedAttribute(MappedAttribute* attr)
  79 {
  80     const String& value = attr->value();
  81     if (attr->name() == SVGNames::filterUnitsAttr) {
  82         if (value == "userSpaceOnUse")
  83             setFilterUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
  84         else if (value == "objectBoundingBox")
  85             setFilterUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
  86     } else if (attr->name() == SVGNames::primitiveUnitsAttr) {
  87         if (value == "userSpaceOnUse")
  88             setPrimitiveUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
  89         else if (value == "objectBoundingBox")
  90             setPrimitiveUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
  91     } else if (attr->name() == SVGNames::xAttr)
  92         setXBaseValue(SVGLength(this, LengthModeWidth, value));
  93     else if (attr->name() == SVGNames::yAttr)
  94         setYBaseValue(SVGLength(this, LengthModeHeight, value));
  95     else if (attr->name() == SVGNames::widthAttr)
  96         setWidthBaseValue(SVGLength(this, LengthModeWidth, value));
  97     else if (attr->name() == SVGNames::heightAttr)
  98         setHeightBaseValue(SVGLength(this, LengthModeHeight, value));
  99     else {
 100         if (SVGURIReference::parseMappedAttribute(attr)) return;
 101         if (SVGLangSpace::parseMappedAttribute(attr)) return;
 102         if (SVGExternalResourcesRequired::parseMappedAttribute(attr)) return;
 103
 104         SVGStyledElement::parseMappedAttribute(attr);
 105     }
 106 }
 107
 108 SVGResource* SVGFilterElement::canvasResource()
 109 {
 110     if (!attached())
 111         return 0;
 112
 113     if (!m_filter)
 114         m_filter = new SVGResourceFilter();
 115
 116     bool filterBBoxMode = filterUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
 117     m_filter->setFilterBoundingBoxMode(filterBBoxMode);
 118
 119     float _x, _y, _width, _height;
 120
 121     if (filterBBoxMode) {
 122         _x = x().valueAsPercentage();
 123         _y = y().valueAsPercentage();
 124         _width = width().valueAsPercentage();
 125         _height = height().valueAsPercentage();
 126     } else {
 127         m_filter->setXBoundingBoxMode(x().unitType() == LengthTypePercentage);
 128         m_filter->setYBoundingBoxMode(y().unitType() == LengthTypePercentage);
 129
 130         _x = x().value();
 131         _y = y().value();
 132         _width = width().value();
 133         _height = height().value();
 134     }
 135
 136     m_filter->setFilterRect(FloatRect(_x, _y, _width, _height));
 137
 138     bool primitiveBBoxMode = primitiveUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
 139     m_filter->setEffectBoundingBoxMode(primitiveBBoxMode);
 140
 141     // TODO : use switch/case instead?
 142     m_filter->clearEffects();
 143     for (Node* n = firstChild(); n != 0; n = n->nextSibling()) {
 144         SVGElement* element = 0;
 145         if (n->isSVGElement())
 146             element = static_cast<SVGElement*>(n);
 147         if (element && element->isFilterEffect()) {
 148             SVGFilterPrimitiveStandardAttributes* filterAttributes = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);
 149             SVGFilterEffect* filterEffect = filterAttributes->filterEffect(m_filter.get());
 150             if (!filterEffect)
 151                 continue;
 152
 153             m_filter->addFilterEffect(filterEffect);
 154         }
 155     }
 156
 157     return m_filter.get();
 158 }
 159
 160 }
 161
 162 #endif // ENABLE(SVG)
 163
 164 // vim:ts=4:noet