1 /* 2 * Copyright (C) 2008 Alex Mathews <possessedpenguinbob (at) gmail.com> 3 * Copyright (C) 2009 Dirk Schulze <krit (at) webkit.org> 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef SVGFilterBuilder_h 22 #define SVGFilterBuilder_h 23 24 #if ENABLE(SVG) && ENABLE(FILTERS) 25 #include "FilterEffect.h" 26 #include "PlatformString.h" 27 #include "RenderObject.h" 28 29 #include <wtf/HashMap.h> 30 #include <wtf/HashSet.h> 31 #include <wtf/PassRefPtr.h> 32 #include <wtf/text/AtomicStringHash.h> 33 34 namespace WebCore { 35 36 class SVGFilterBuilder : public RefCounted<SVGFilterBuilder> { 37 public: 38 typedef HashSet<FilterEffect*> FilterEffectSet; 39 40 static PassRefPtr<SVGFilterBuilder> create(Filter* filter) { return adoptRef(new SVGFilterBuilder(filter)); } 41 42 void add(const AtomicString& id, RefPtr<FilterEffect> effect); 43 44 FilterEffect* getEffectById(const AtomicString& id) const; 45 FilterEffect* lastEffect() const { return m_lastEffect.get(); } 46 47 void appendEffectToEffectReferences(RefPtr<FilterEffect>, RenderObject*); 48 49 inline FilterEffectSet& effectReferences(FilterEffect* effect) 50 { 51 // Only allowed for effects belongs to this builder. 52 ASSERT(m_effectReferences.contains(effect)); 53 return m_effectReferences.find(effect)->second; 54 } 55 56 // Required to change the attributes of a filter during an svgAttributeChanged. 57 inline FilterEffect* effectByRenderer(RenderObject* object) { return m_effectRenderer.get(object); } 58 59 void clearEffects(); 60 void clearResultsRecursive(FilterEffect*); 61 62 private: 63 SVGFilterBuilder(Filter*); 64 65 inline void addBuiltinEffects() 66 { 67 HashMap<AtomicString, RefPtr<FilterEffect> >::iterator end = m_builtinEffects.end(); 68 for (HashMap<AtomicString, RefPtr<FilterEffect> >::iterator iterator = m_builtinEffects.begin(); iterator != end; ++iterator) 69 m_effectReferences.add(iterator->second, FilterEffectSet()); 70 } 71 72 HashMap<AtomicString, RefPtr<FilterEffect> > m_builtinEffects; 73 HashMap<AtomicString, RefPtr<FilterEffect> > m_namedEffects; 74 // The value is a list, which contains those filter effects, 75 // which depends on the key filter effect. 76 HashMap<RefPtr<FilterEffect>, FilterEffectSet> m_effectReferences; 77 HashMap<RenderObject*, FilterEffect*> m_effectRenderer; 78 79 RefPtr<FilterEffect> m_lastEffect; 80 }; 81 82 } // namespace WebCore 83 84 #endif // ENABLE(SVG) && ENABLE(FILTERS) 85 #endif // SVGFilterBuilder_h 86
