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#include "core/svg/graphics/filters/SVGFilterBuilder.h" 22 23#include "platform/graphics/filters/SourceAlpha.h" 24#include "platform/graphics/filters/SourceGraphic.h" 25 26namespace blink { 27 28SVGFilterBuilder::SVGFilterBuilder(PassRefPtr<FilterEffect> sourceGraphic, PassRefPtr<FilterEffect> sourceAlpha) 29{ 30 m_builtinEffects.add(SourceGraphic::effectName(), sourceGraphic); 31 m_builtinEffects.add(SourceAlpha::effectName(), sourceAlpha); 32 addBuiltinEffects(); 33} 34 35void SVGFilterBuilder::add(const AtomicString& id, PassRefPtr<FilterEffect> effect) 36{ 37 if (id.isEmpty()) { 38 m_lastEffect = effect; 39 return; 40 } 41 42 if (m_builtinEffects.contains(id)) 43 return; 44 45 m_lastEffect = effect; 46 m_namedEffects.set(id, m_lastEffect); 47} 48 49FilterEffect* SVGFilterBuilder::getEffectById(const AtomicString& id) const 50{ 51 if (!id.isEmpty()) { 52 if (FilterEffect* builtinEffect = m_builtinEffects.get(id)) 53 return builtinEffect; 54 55 if (FilterEffect* namedEffect = m_namedEffects.get(id)) 56 return namedEffect; 57 } 58 59 if (m_lastEffect) 60 return m_lastEffect.get(); 61 62 return m_builtinEffects.get(SourceGraphic::effectName()); 63} 64 65void SVGFilterBuilder::appendEffectToEffectReferences(PassRefPtr<FilterEffect> prpEffect, RenderObject* object) 66{ 67 RefPtr<FilterEffect> effect = prpEffect; 68 69 // The effect must be a newly created filter effect. 70 ASSERT(!m_effectReferences.contains(effect)); 71 ASSERT(object && !m_effectRenderer.contains(object)); 72 m_effectReferences.add(effect, FilterEffectSet()); 73 74 unsigned numberOfInputEffects = effect->inputEffects().size(); 75 76 // It is not possible to add the same value to a set twice. 77 for (unsigned i = 0; i < numberOfInputEffects; ++i) 78 effectReferences(effect->inputEffect(i)).add(effect.get()); 79 m_effectRenderer.add(object, effect.get()); 80} 81 82void SVGFilterBuilder::clearEffects() 83{ 84 m_lastEffect = nullptr; 85 m_namedEffects.clear(); 86 m_effectReferences.clear(); 87 m_effectRenderer.clear(); 88 addBuiltinEffects(); 89} 90 91void SVGFilterBuilder::clearResultsRecursive(FilterEffect* effect) 92{ 93 if (!effect->hasResult() && !effect->hasImageFilter()) 94 return; 95 96 effect->clearResult(); 97 98 HashSet<FilterEffect*>& effectReferences = this->effectReferences(effect); 99 HashSet<FilterEffect*>::iterator end = effectReferences.end(); 100 for (HashSet<FilterEffect*>::iterator it = effectReferences.begin(); it != end; ++it) 101 clearResultsRecursive(*it); 102} 103 104} // namespace blink 105