99 lines
3.8 KiB
C++
99 lines
3.8 KiB
C++
/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef OSGEARTHSYMBOLOGY_RESOURCE_CACHE_H
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#define OSGEARTHSYMBOLOGY_RESOURCE_CACHE_H 1
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#include <osgEarth/Common>
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#include <osgEarth/Skins>
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#include <osgEarth/InstanceResource>
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#include <osgEarth/ResourceLibrary>
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#include <osgEarth/Containers>
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#include <osgEarth/Threading>
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namespace osgEarth { namespace Util
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{
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/**
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* Caches the runtime objects created by resources, so we can avoid creating them
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* each time they are referenced.
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*
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* This object is thread-safe.
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*/
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class OSGEARTH_EXPORT ResourceCache : public osg::Referenced
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{
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public:
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/**
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* Constructs a new resource cache.
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*/
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ResourceCache();
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/**
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* Fetches the StateSet implementation corresponding to a Skin.
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* @param skin Skin resource for which to get or create a state set.
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* @param output Result goes here.
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*/
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bool getOrCreateStateSet(SkinResource* skin, osg::ref_ptr<osg::StateSet>& output, const osgDB::Options* readOptions);
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/**
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* Get the statistics collected from the skin cache.
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*/
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const CacheStats getSkinStats() const { return _skinCache.getStats(); }
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/**
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* Gets a node corresponding to an instance resource.
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* @param skin Instance resource for which to get or create a Node.
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* @param output Result goes here.
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*/
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bool getOrCreateInstanceNode( InstanceResource* instance, osg::ref_ptr<osg::Node>& output, const osgDB::Options* readOptions );
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bool cloneOrCreateInstanceNode( InstanceResource* instance, osg::ref_ptr<osg::Node>& output, const osgDB::Options* readOptions );
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const CacheStats getInstanceStats() const { return _instanceCache.getStats(); }
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/**
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* Fetches the StateSet implementation for an entire ResourceLibrary. This will contain a Texture2DArray with all of the skins merged into it.
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* @param library The library
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* @param output Result goes here.
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*/
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bool getOrCreateStateSet( ResourceLibrary* library, osg::ref_ptr<osg::StateSet>& output, const osgDB::Options* readOptions );
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bool getOrCreateLineTexture(const URI& uri, osg::ref_ptr<osg::Texture>& output, const osgDB::Options* readOptions);
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protected:
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virtual ~ResourceCache() { }
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//osg::ref_ptr<const osgDB::Options> _dbOptions;
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//typedef LRUCache<std::string, osg::observer_ptr<osg::StateSet> > SkinCache;
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typedef LRUCache<std::string, osg::ref_ptr<osg::StateSet> > SkinCache;
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SkinCache _skinCache;
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std::mutex _skinMutex;
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typedef LRUCache<std::string, osg::ref_ptr<osg::Texture> > TextureCache;
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TextureCache _texCache;
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std::mutex _texMutex;
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//typedef LRUCache<std::string, osg::observer_ptr<osg::Node> > InstanceCache;
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typedef LRUCache<std::string, osg::ref_ptr<osg::Node> > InstanceCache;
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InstanceCache _instanceCache;
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std::mutex _instanceMutex;
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};
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} }
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#endif // OSGEARTHSYMBOLOGY_RESOURCE_CACHE_H
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