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 #include "platform/graphics/filters/FilterEffect.h" 25 #include "wtf/HashMap.h" 26 #include "wtf/HashSet.h" 27 #include "wtf/PassRefPtr.h" 28 #include "wtf/text/AtomicStringHash.h" 29 #include "wtf/text/WTFString.h" 30 31 namespace WebCore { 32 33 class RenderObject; 34 35 class SVGFilterBuilder : public RefCounted<SVGFilterBuilder> { 36 public: 37 typedef HashSet<FilterEffect*> FilterEffectSet; 38 39 static PassRefPtr<SVGFilterBuilder> create(PassRefPtr<FilterEffect> sourceGraphic, PassRefPtr<FilterEffect> sourceAlpha) { return adoptRef(new SVGFilterBuilder(sourceGraphic, sourceAlpha)); } 40 41 void add(const AtomicString& id, PassRefPtr<FilterEffect>); 42 43 FilterEffect* getEffectById(const AtomicString& id) const; 44 FilterEffect* lastEffect() const { return m_lastEffect.get(); } 45 46 void appendEffectToEffectReferences(PassRefPtr<FilterEffect>, RenderObject*); 47 48 inline FilterEffectSet& effectReferences(FilterEffect* effect) 49 { 50 // Only allowed for effects belongs to this builder. 51 ASSERT(m_effectReferences.contains(effect)); 52 return m_effectReferences.find(effect)->value; 53 } 54 55 // Required to change the attributes of a filter during an svgAttributeChanged. 56 inline FilterEffect* effectByRenderer(RenderObject* object) { return m_effectRenderer.get(object); } 57 58 void clearEffects(); 59 void clearResultsRecursive(FilterEffect*); 60 61 private: 62 SVGFilterBuilder(PassRefPtr<FilterEffect> sourceGraphic, PassRefPtr<FilterEffect> sourceAlpha); 63 64 inline void addBuiltinEffects() 65 { 66 HashMap<AtomicString, RefPtr<FilterEffect> >::iterator end = m_builtinEffects.end(); 67 for (HashMap<AtomicString, RefPtr<FilterEffect> >::iterator iterator = m_builtinEffects.begin(); iterator != end; ++iterator) 68 m_effectReferences.add(iterator->value, FilterEffectSet()); 69 } 70 71 HashMap<AtomicString, RefPtr<FilterEffect> > m_builtinEffects; 72 HashMap<AtomicString, RefPtr<FilterEffect> > m_namedEffects; 73 // The value is a list, which contains those filter effects, 74 // which depends on the key filter effect. 75 HashMap<RefPtr<FilterEffect>, FilterEffectSet> m_effectReferences; 76 HashMap<RenderObject*, FilterEffect*> m_effectRenderer; 77 78 RefPtr<FilterEffect> m_lastEffect; 79 }; 80 81 } // namespace WebCore 82 83 #endif // SVGFilterBuilder_h 84
