1/* 2 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20#include "config.h" 21 22#if ENABLE(SVG) && ENABLE(FILTERS) 23#include "SVGFilterBuilder.h" 24 25#include "FilterEffect.h" 26#include "PlatformString.h" 27#include "SourceAlpha.h" 28#include "SourceGraphic.h" 29 30#include <wtf/PassRefPtr.h> 31 32namespace WebCore { 33 34SVGFilterBuilder::SVGFilterBuilder(Filter* filter) 35 : m_lastEffect(0) 36{ 37 m_builtinEffects.add(SourceGraphic::effectName(), SourceGraphic::create(filter)); 38 m_builtinEffects.add(SourceAlpha::effectName(), SourceAlpha::create(filter)); 39 addBuiltinEffects(); 40} 41 42void SVGFilterBuilder::add(const AtomicString& id, RefPtr<FilterEffect> effect) 43{ 44 if (id.isEmpty()) { 45 m_lastEffect = effect; 46 return; 47 } 48 49 if (m_builtinEffects.contains(id)) 50 return; 51 52 m_lastEffect = effect; 53 m_namedEffects.set(id, m_lastEffect); 54} 55 56FilterEffect* SVGFilterBuilder::getEffectById(const AtomicString& id) const 57{ 58 if (id.isEmpty()) { 59 if (m_lastEffect) 60 return m_lastEffect.get(); 61 62 return m_builtinEffects.get(SourceGraphic::effectName()).get(); 63 } 64 65 if (m_builtinEffects.contains(id)) 66 return m_builtinEffects.get(id).get(); 67 68 return m_namedEffects.get(id).get(); 69} 70 71void SVGFilterBuilder::appendEffectToEffectReferences(RefPtr<FilterEffect> effectReference, RenderObject* object) 72{ 73 // The effect must be a newly created filter effect. 74 ASSERT(!m_effectReferences.contains(effectReference)); 75 ASSERT(object && !m_effectRenderer.contains(object)); 76 m_effectReferences.add(effectReference, FilterEffectSet()); 77 78 FilterEffect* effect = effectReference.get(); 79 unsigned numberOfInputEffects = effect->inputEffects().size(); 80 81 // It is not possible to add the same value to a set twice. 82 for (unsigned i = 0; i < numberOfInputEffects; ++i) 83 effectReferences(effect->inputEffect(i)).add(effect); 84 m_effectRenderer.add(object, effectReference.get()); 85} 86 87void SVGFilterBuilder::clearEffects() 88{ 89 m_lastEffect = 0; 90 m_namedEffects.clear(); 91 m_effectReferences.clear(); 92 m_effectRenderer.clear(); 93 addBuiltinEffects(); 94} 95 96void SVGFilterBuilder::clearResultsRecursive(FilterEffect* effect) 97{ 98 if (!effect->hasResult()) 99 return; 100 101 effect->clearResult(); 102 103 HashSet<FilterEffect*>& effectReferences = this->effectReferences(effect); 104 HashSet<FilterEffect*>::iterator end = effectReferences.end(); 105 for (HashSet<FilterEffect*>::iterator it = effectReferences.begin(); it != end; ++it) 106 clearResultsRecursive(*it); 107} 108 109} // namespace WebCore 110 111#endif // ENABLE(SVG) && ENABLE(FILTERS) 112