SVGFilterElement.cpp [plain text]
#include "config.h"
#if ENABLE(SVG) && ENABLE(FILTERS)
#include "SVGFilterElement.h"
#include "Attr.h"
#include "FloatSize.h"
#include "MappedAttribute.h"
#include "PlatformString.h"
#include "SVGFilterBuilder.h"
#include "SVGFilterPrimitiveStandardAttributes.h"
#include "SVGLength.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGResourceFilter.h"
#include "SVGUnitTypes.h"
namespace WebCore {
char SVGFilterResXIdentifier[] = "SVGFilterResX";
char SVGFilterResYIdentifier[] = "SVGFilterResY";
SVGFilterElement::SVGFilterElement(const QualifiedName& tagName, Document* doc)
: SVGStyledElement(tagName, doc)
, SVGURIReference()
, SVGLangSpace()
, SVGExternalResourcesRequired()
, m_filterUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
, m_primitiveUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
, m_x(LengthModeWidth, "-10%")
, m_y(LengthModeHeight, "-10%")
, m_width(LengthModeWidth, "120%")
, m_height(LengthModeHeight, "120%")
{
}
SVGFilterElement::~SVGFilterElement()
{
}
void SVGFilterElement::setFilterRes(unsigned long, unsigned long) const
{
}
void SVGFilterElement::parseMappedAttribute(MappedAttribute* attr)
{
const String& value = attr->value();
if (attr->name() == SVGNames::filterUnitsAttr) {
if (value == "userSpaceOnUse")
setFilterUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
else if (value == "objectBoundingBox")
setFilterUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
} else if (attr->name() == SVGNames::primitiveUnitsAttr) {
if (value == "userSpaceOnUse")
setPrimitiveUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
else if (value == "objectBoundingBox")
setPrimitiveUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
} else if (attr->name() == SVGNames::xAttr)
setXBaseValue(SVGLength(LengthModeWidth, value));
else if (attr->name() == SVGNames::yAttr)
setYBaseValue(SVGLength(LengthModeHeight, value));
else if (attr->name() == SVGNames::widthAttr)
setWidthBaseValue(SVGLength(LengthModeWidth, value));
else if (attr->name() == SVGNames::heightAttr)
setHeightBaseValue(SVGLength(LengthModeHeight, value));
else if (attr->name() == SVGNames::filterResAttr) {
float x, y;
if (parseNumberOptionalNumber(value, x, y)) {
setFilterResXBaseValue(x);
setFilterResYBaseValue(y);
}
} else {
if (SVGURIReference::parseMappedAttribute(attr))
return;
if (SVGLangSpace::parseMappedAttribute(attr))
return;
if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
return;
SVGStyledElement::parseMappedAttribute(attr);
}
}
void SVGFilterElement::synchronizeProperty(const QualifiedName& attrName)
{
SVGStyledElement::synchronizeProperty(attrName);
if (attrName == anyQName()) {
synchronizeX();
synchronizeY();
synchronizeWidth();
synchronizeHeight();
synchronizeFilterUnits();
synchronizePrimitiveUnits();
synchronizeFilterResX();
synchronizeFilterResY();
synchronizeExternalResourcesRequired();
synchronizeHref();
return;
}
if (attrName == SVGNames::xAttr)
synchronizeX();
else if (attrName == SVGNames::yAttr)
synchronizeY();
else if (attrName == SVGNames::widthAttr)
synchronizeWidth();
else if (attrName == SVGNames::heightAttr)
synchronizeHeight();
else if (attrName == SVGNames::filterUnitsAttr)
synchronizeFilterUnits();
else if (attrName == SVGNames::primitiveUnitsAttr)
synchronizePrimitiveUnits();
else if (attrName == SVGNames::filterResAttr) {
synchronizeFilterResX();
synchronizeFilterResY();
} else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))
synchronizeExternalResourcesRequired();
else if (SVGURIReference::isKnownAttribute(attrName))
synchronizeHref();
}
FloatRect SVGFilterElement::filterBoundingBox(const FloatRect& objectBoundingBox) const
{
FloatRect filterBBox;
if (filterUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
filterBBox = FloatRect(x().valueAsPercentage() * objectBoundingBox.width() + objectBoundingBox.x(),
y().valueAsPercentage() * objectBoundingBox.height() + objectBoundingBox.y(),
width().valueAsPercentage() * objectBoundingBox.width(),
height().valueAsPercentage() * objectBoundingBox.height());
else
filterBBox = FloatRect(x().value(this),
y().value(this),
width().value(this),
height().value(this));
return filterBBox;
}
void SVGFilterElement::buildFilter(const FloatRect& targetRect) const
{
bool filterBBoxMode = filterUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
bool primitiveBBoxMode = primitiveUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
FloatRect filterBBox;
if (filterBBoxMode)
filterBBox = FloatRect(x().valueAsPercentage(),
y().valueAsPercentage(),
width().valueAsPercentage(),
height().valueAsPercentage());
else
filterBBox = FloatRect(x().value(this),
y().value(this),
width().value(this),
height().value(this));
FloatRect filterRect = filterBBox;
if (filterBBoxMode)
filterRect = FloatRect(targetRect.x() + filterRect.x() * targetRect.width(),
targetRect.y() + filterRect.y() * targetRect.height(),
filterRect.width() * targetRect.width(),
filterRect.height() * targetRect.height());
m_filter->setFilterBoundingBox(filterRect);
m_filter->setFilterRect(filterBBox);
m_filter->setEffectBoundingBoxMode(primitiveBBoxMode);
m_filter->setFilterBoundingBoxMode(filterBBoxMode);
if (hasAttribute(SVGNames::filterResAttr)) {
m_filter->setHasFilterResolution(true);
m_filter->setFilterResolution(FloatSize(filterResX(), filterResY()));
}
m_filter->builder()->clearEffects();
for (Node* n = firstChild(); n != 0; n = n->nextSibling()) {
SVGElement* element = 0;
if (n->isSVGElement()) {
element = static_cast<SVGElement*>(n);
if (element->isFilterEffect()) {
SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);
if (!effectElement->build(m_filter.get())) {
m_filter->builder()->clearEffects();
break;
}
}
}
}
}
SVGResource* SVGFilterElement::canvasResource(const RenderObject*)
{
if (!attached())
return 0;
if (!m_filter)
m_filter = SVGResourceFilter::create(this);
return m_filter.get();
}
}
#endif // ENABLE(SVG) && ENABLE(FILTERS)