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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2010 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#ifndef OSGEARTHSYMBOLOGY_RESOURCE_CACHE_H
#define OSGEARTHSYMBOLOGY_RESOURCE_CACHE_H 1

#include <osgEarthSymbology/Common>
#include <osgEarthSymbology/Skins>
#include <osgEarthSymbology/MarkerResource>
#include <osgEarth/Utils>
#include <osgEarth/ThreadingUtils>

namespace osgEarth { namespace Symbology
{
    class OSGEARTHSYMBOLOGY_EXPORT ResourceCache : public osg::Referenced
    {
    public:
        ResourceCache( bool threadSafe =false ) : _threadSafe(threadSafe) { }

        osg::StateSet* getStateSet( SkinResource* skin );

        const CacheStats getSkinStats() const { return _skinCache.getStats(); }

        osg::Node* getMarkerNode( MarkerResource* marker );

    protected:
        bool                      _threadSafe;
        Threading::ReadWriteMutex _mutex;

        typedef LRUCache<SkinResource*, osg::ref_ptr<osg::StateSet> > SkinCache;
        SkinCache _skinCache;

        typedef LRUCache<MarkerResource*, osg::ref_ptr<osg::Node> > MarkerCache;
        MarkerCache _markerCache;
    };

} } // namespace osgEarth::Symbology

#endif // OSGEARTHSYMBOLOGY_RESOURCE_CACHE_H