SVGFilterBuilder.cpp [plain text]
#include "config.h"
#if ENABLE(SVG) && ENABLE(FILTERS)
#include "SVGFilterBuilder.h"
#include "FilterEffect.h"
#include "PlatformString.h"
#include "SourceAlpha.h"
#include "SourceGraphic.h"
#include <wtf/PassRefPtr.h>
namespace WebCore {
SVGFilterBuilder::SVGFilterBuilder(Filter* filter)
: m_lastEffect(0)
{
m_builtinEffects.add(SourceGraphic::effectName(), SourceGraphic::create(filter));
m_builtinEffects.add(SourceAlpha::effectName(), SourceAlpha::create(filter));
addBuiltinEffects();
}
void SVGFilterBuilder::add(const AtomicString& id, RefPtr<FilterEffect> effect)
{
if (id.isEmpty()) {
m_lastEffect = effect;
return;
}
if (m_builtinEffects.contains(id))
return;
m_lastEffect = effect;
m_namedEffects.set(id, m_lastEffect);
}
FilterEffect* SVGFilterBuilder::getEffectById(const AtomicString& id) const
{
if (id.isEmpty()) {
if (m_lastEffect)
return m_lastEffect.get();
return m_builtinEffects.get(SourceGraphic::effectName()).get();
}
if (m_builtinEffects.contains(id))
return m_builtinEffects.get(id).get();
return m_namedEffects.get(id).get();
}
void SVGFilterBuilder::appendEffectToEffectReferences(RefPtr<FilterEffect> effectReference, RenderObject* object)
{
ASSERT(!m_effectReferences.contains(effectReference));
ASSERT(object && !m_effectRenderer.contains(object));
m_effectReferences.add(effectReference, FilterEffectSet());
FilterEffect* effect = effectReference.get();
unsigned numberOfInputEffects = effect->inputEffects().size();
for (unsigned i = 0; i < numberOfInputEffects; ++i)
effectReferences(effect->inputEffect(i)).add(effect);
m_effectRenderer.add(object, effectReference.get());
}
void SVGFilterBuilder::clearEffects()
{
m_lastEffect = 0;
m_namedEffects.clear();
m_effectReferences.clear();
m_effectRenderer.clear();
addBuiltinEffects();
}
void SVGFilterBuilder::clearResultsRecursive(FilterEffect* effect)
{
if (!effect->hasResult())
return;
effect->clearResult();
HashSet<FilterEffect*>& effectReferences = this->effectReferences(effect);
HashSet<FilterEffect*>::iterator end = effectReferences.end();
for (HashSet<FilterEffect*>::iterator it = effectReferences.begin(); it != end; ++it)
clearResultsRecursive(*it);
}
}
#endif // ENABLE(SVG) && ENABLE(FILTERS)