DtCDBTileCache.h

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/****************************************************************************** 
** Copyright (c) 2016 MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 

#pragma once

#include <string>
#include <osg/ref_ptr>
#include <osg/Image>
#include <osg/Shape>
#include <osgEarth/GeoData>
#include <OpenThreads/Mutex>
#include <map>
#include <queue>
#include "DtCDBExport.h"

namespace makVrv { namespace oe { namespace CDB
{
   class DT_DLL_OSGEARTH_CDB CDBTileCache
   {
   public:

      CDBTileCache();

      virtual ~CDBTileCache();

      void createCdbGeoCellIndex(const std::string& CdbRootPath, osgEarth::GeoExtent& CdbGeoExtent, bool readMaxLod);

      bool isCdbGeocellAvailable(const std::string& latitude, const std::string& longitude);

      bool isCdbGeoCellIndexCreated() const;

      osg::Image* image(const std::string& CdbTile);

      void addImage(const std::string& CdbTile, osg::ref_ptr< osg::Image > rbgImage); 

      float imageHitPercentage();

      osg::HeightField* heightField(const std::string& CdbTile);

      void  addHeightField(const std::string& CdbTile, osg::ref_ptr< osg::HeightField > elevation); 

      float heightFieldHitPercentage();

      void setCacheSize(int cacheSize);

      int cacheSize();

      int maxElevationLod() const;

      int maxImageryLod() const;


   private:        
        
      std::map<std::string, osg::ref_ptr< osg::Image > > myCdbImgaryMap;         

      std::queue<std::string> myCdbImgaryQueue;                                  

      std::map<std::string, osg::ref_ptr< osg::HeightField > > myCdbElevationMap;  

      std::queue<std::string> myCdbElevationQueue;                                 

      size_t myNbCacheSize;                                                            

      unsigned long myImageRequestCount;                                           

      unsigned long myImageCacheHit;                     

      unsigned long myElevationRequestCount;                                       

      unsigned long myElevationCacheHit;                                           

      static bool theCdbGeoCellIndexSet;

      typedef std::map<std::string, bool> DtLogitudeGeocellMap;        

      static std::map<std::string, DtLogitudeGeocellMap> theCdbGeoCellMap;

      static int theMaxElevationLod;
        
      static int theMaxImageryLod;
        
      static int theMinLongitude;

      static int theMaxLongitude;

      static int theMinLatitude;

      static int theMaxLatitude;

      OpenThreads::Mutex myMutex;
   };

} } } // namespace mak::osgEarth::CDB