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141 lines
4.6 KiB
141 lines
4.6 KiB
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
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* |
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* This library is open source and may be redistributed and/or modified under |
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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* (at your option) any later version. The full license is in LICENSE file |
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* included with this distribution, and on the openscenegraph.org website. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* OpenSceneGraph Public License for more details. |
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*/ |
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#ifndef OSGDB_SHAREDSTATEMANAGER |
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#define OSGDB_SHAREDSTATEMANAGER 1 |
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#include <osg/NodeVisitor> |
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#include <osg/Geode> |
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#include <osgDB/Export> |
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#include <OpenThreads/Mutex> |
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#include <set> |
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namespace osgDB { |
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class OSGDB_EXPORT SharedStateManager : public osg::NodeVisitor |
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{ |
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public: |
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enum ShareMode |
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{ |
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SHARE_NONE = 0, |
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SHARE_STATIC_TEXTURES = 1<<0, |
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SHARE_UNSPECIFIED_TEXTURES = 1<<1, |
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SHARE_DYNAMIC_TEXTURES = 1<<2, |
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SHARE_STATIC_STATESETS = 1<<3, |
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SHARE_UNSPECIFIED_STATESETS = 1<<4, |
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SHARE_DYNAMIC_STATESETS = 1<<5, |
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SHARE_TEXTURES = SHARE_STATIC_TEXTURES | SHARE_UNSPECIFIED_TEXTURES, |
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SHARE_STATESETS = SHARE_STATIC_STATESETS | SHARE_UNSPECIFIED_STATESETS, |
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SHARE_ALL = SHARE_TEXTURES | |
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SHARE_STATESETS |
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}; |
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SharedStateManager(unsigned int mode = SHARE_ALL); |
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META_NodeVisitor("osgDB","SharedStateManager") |
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void setShareMode(unsigned int mode); |
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unsigned int getShareMode() { return _shareMode; } |
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// Call right after each unload and before Registry cache prune. |
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void prune(); |
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// Call right after each load |
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void share(osg::Node *node, OpenThreads::Mutex *mt=0); |
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void apply(osg::Node& node); |
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void apply(osg::Geode& geode); |
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// Answers the question "Will this state set be eliminated by |
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// the SharedStateManager because an equivalent one has been |
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// seen already?" Safe to call from the pager thread. |
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bool isShared(osg::StateSet* stateSet); |
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bool isShared(osg::Texture* texture); |
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void releaseGLObjects(osg::State* state ) const; |
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protected: |
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inline bool shareTexture(osg::Object::DataVariance variance) |
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{ |
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return _shareTexture[variance]; |
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} |
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inline bool shareStateSet(osg::Object::DataVariance variance) |
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{ |
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return _shareStateSet[variance]; |
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} |
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void process(osg::StateSet* ss, osg::Object* parent); |
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osg::StateAttribute *find(osg::StateAttribute *sa); |
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osg::StateSet *find(osg::StateSet *ss); |
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void setStateSet(osg::StateSet* ss, osg::Object* object); |
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void shareTextures(osg::StateSet* ss); |
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struct CompareStateAttributes |
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{ |
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bool operator()(const osg::ref_ptr<osg::StateAttribute>& lhs, |
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const osg::ref_ptr<osg::StateAttribute>& rhs) const |
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{ |
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return *lhs < *rhs; |
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} |
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}; |
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struct CompareStateSets |
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{ |
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bool operator()(const osg::ref_ptr<osg::StateSet>& lhs, |
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const osg::ref_ptr<osg::StateSet>& rhs) const |
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{ |
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return lhs->compare(*rhs, true) < 0; |
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} |
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}; |
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// Lists of shared objects |
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typedef std::set< osg::ref_ptr<osg::StateAttribute>, CompareStateAttributes > TextureSet; |
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TextureSet _sharedTextureList; |
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typedef std::set< osg::ref_ptr<osg::StateSet>, CompareStateSets > StateSetSet; |
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StateSetSet _sharedStateSetList; |
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// Temporary lists just to avoid unnecessary find calls |
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typedef std::pair<osg::StateAttribute*, bool> TextureSharePair; |
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typedef std::map<osg::StateAttribute*, TextureSharePair> TextureTextureSharePairMap; |
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TextureTextureSharePairMap tmpSharedTextureList; |
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typedef std::pair<osg::StateSet*, bool> StateSetSharePair; |
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typedef std::map<osg::StateSet*, StateSetSharePair> StateSetStateSetSharePairMap; |
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StateSetStateSetSharePairMap tmpSharedStateSetList; |
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unsigned int _shareMode; |
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bool _shareTexture[3]; |
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bool _shareStateSet[3]; |
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// Share connection mutex |
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OpenThreads::Mutex *_mutex; |
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// Mutex for doing isShared queries from other threads |
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mutable OpenThreads::Mutex _listMutex; |
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}; |
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} |
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#endif
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