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/*
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#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)
{
// The effect must be a newly created filter effect.
ASSERT(!m_effectReferences.contains(effectReference));
m_effectReferences.add(effectReference, FilterEffectSet());
FilterEffect* effect = effectReference.get();
unsigned numberOfInputEffects = effect->inputEffects().size();
// It is not possible to add the same value to a set twice.
for (unsigned i = 0; i < numberOfInputEffects; ++i)
getEffectReferences(effect->inputEffect(i)).add(effect);
}
void SVGFilterBuilder::clearEffects()
{
m_lastEffect = 0;
m_namedEffects.clear();
m_effectReferences.clear();
addBuiltinEffects();
}
} // namespace WebCore
#endif // ENABLE(SVG) && ENABLE(FILTERS)
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