| /* |
| * 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, RenderObject* object) |
| { |
| // The effect must be a newly created filter effect. |
| 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(); |
| |
| // It is not possible to add the same value to a set twice. |
| 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); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(SVG) && ENABLE(FILTERS) |