EmbreeTargetManager.h

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#ifndef EmbreeTargetManager_h
#define EmbreeTargetManager_h

#include <QMap>

#include "EmbreeTargetShape.h"

namespace Isis {

  class EmbreeTargetManager {
    public:
      static EmbreeTargetManager *getInstance();

      EmbreeTargetShape *create(const QString &shapeFile);
      void free(const QString &shapeFile);

      int currentCacheSize() const;
      int maxCacheSize() const;
      bool inCache(const QString &shapeFile) const;
      void setMaxCacheSize(const int &numShapes);

    private:
      // This factory is a singleton, so the constructor and destructor are private.
      // To get an instance of this class use the static getInstance() method.
      EmbreeTargetManager();
      ~EmbreeTargetManager();

      // This method deletes the singleton factory when QT exits
      static void DieAtExit();

      struct EmbreeTargetShapeContainer {
        EmbreeTargetShapeContainer()
          : m_fullFilePath(""),
            m_targetShape(0),
            m_referenceCount(0) { }

        EmbreeTargetShapeContainer(const QString &fullPath,
                                   EmbreeTargetShape *targetShape)
          : m_fullFilePath(fullPath),
            m_targetShape(targetShape),
            m_referenceCount(0) { }

        QString            m_fullFilePath;   
        EmbreeTargetShape *m_targetShape;    
        int                m_referenceCount; 
      };

      QString fullFilePath(const QString &filePath) const;
      void removeTargetShape(const QString &shapeFile);

      static EmbreeTargetManager *m_maker; 
      QMap<QString, EmbreeTargetShapeContainer> m_targeCache; 
      int m_maxCacheSize; 
  };

};

#endif