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(FILTERS) 23#include "SVGFilterBuilder.h" 24 25#include "FilterEffect.h" 26#include "SourceAlpha.h" 27#include "SourceGraphic.h" 28#include <wtf/PassRefPtr.h> 29#include <wtf/text/WTFString.h> 30 31namespace WebCore { 32 33SVGFilterBuilder::SVGFilterBuilder(PassRefPtr<FilterEffect> sourceGraphic, PassRefPtr<FilterEffect> sourceAlpha) 34{ 35 m_builtinEffects.add(SourceGraphic::effectName(), sourceGraphic); 36 m_builtinEffects.add(SourceAlpha::effectName(), sourceAlpha); 37 addBuiltinEffects(); 38} 39 40void SVGFilterBuilder::add(const AtomicString& id, PassRefPtr<FilterEffect> effect) 41{ 42 if (id.isEmpty()) { 43 m_lastEffect = effect; 44 return; 45 } 46 47 if (m_builtinEffects.contains(id)) 48 return; 49 50 m_lastEffect = effect; 51 m_namedEffects.set(id, m_lastEffect); 52} 53 54FilterEffect* SVGFilterBuilder::getEffectById(const AtomicString& id) const 55{ 56 if (id.isEmpty()) { 57 if (m_lastEffect) 58 return m_lastEffect.get(); 59 60 return m_builtinEffects.get(SourceGraphic::effectName()); 61 } 62 63 if (m_builtinEffects.contains(id)) 64 return m_builtinEffects.get(id); 65 66 return m_namedEffects.get(id); 67} 68 69void SVGFilterBuilder::appendEffectToEffectReferences(PassRefPtr<FilterEffect> prpEffect, RenderObject* object) 70{ 71 RefPtr<FilterEffect> effect = prpEffect; 72 73 // The effect must be a newly created filter effect. 74 ASSERT(!m_effectReferences.contains(effect)); 75 ASSERT(object && !m_effectRenderer.contains(object)); 76 m_effectReferences.add(effect, FilterEffectSet()); 77 78 unsigned numberOfInputEffects = effect->inputEffects().size(); 79 80 // It is not possible to add the same value to a set twice. 81 for (unsigned i = 0; i < numberOfInputEffects; ++i) 82 effectReferences(effect->inputEffect(i)).add(effect.get()); 83 m_effectRenderer.add(object, effect.get()); 84} 85 86void SVGFilterBuilder::clearEffects() 87{ 88 m_lastEffect = 0; 89 m_namedEffects.clear(); 90 m_effectReferences.clear(); 91 m_effectRenderer.clear(); 92 addBuiltinEffects(); 93} 94 95void SVGFilterBuilder::clearResultsRecursive(FilterEffect* effect) 96{ 97 if (!effect->hasResult()) 98 return; 99 100 effect->clearResult(); 101 102 HashSet<FilterEffect*>& effectReferences = this->effectReferences(effect); 103 HashSet<FilterEffect*>::iterator end = effectReferences.end(); 104 for (HashSet<FilterEffect*>::iterator it = effectReferences.begin(); it != end; ++it) 105 clearResultsRecursive(*it); 106} 107 108} // namespace WebCore 109 110#endif // ENABLE(FILTERS) 111