DtOsgToGlContextTracker.h

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/******************************************************************************
** Copyright (c) 2022 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/



#pragma once
#include <vrvOsg/vrvOsg.h>

#include <vrvUtil/DtVirtualBaseClass.h>

#include <vrvUtil/DtSignalConnectionManager.h>

#include <unordered_map>
#include <unordered_set>

namespace makVrv
{
   class DtDe;
   class DtIndirectLog;

   class DT_DLL_VRVOSG DtOsgToGlContextTracker : public DtVirtualBaseClass
   {
   public:
      static DtOsgToGlContextTracker& instance(DtDe& de);

      virtual ~DtOsgToGlContextTracker();

      DtOsgToGlContextTracker() = delete;
      DtOsgToGlContextTracker& operator=(const DtOsgToGlContextTracker& rhs) = delete;
      DtOsgToGlContextTracker(const DtOsgToGlContextTracker& rhs) = delete;
   public:
      virtual void run();

      virtual const void* currentGlContext(void) const;

      boost::signalslib::signal<void(const void*)> signal_newContextAdded;

      boost::signalslib::signal<void(const void*)> signal_contextAboutToBeDestroyed;

   public:
      virtual void contextAboutToBeDestroyed(const void* glContext);

   protected:
      DtOsgToGlContextTracker(DtDe& de);
   protected:
      DtDe& myDe;

      const void* myCurrentGlContext = nullptr;

      std::unordered_set<const void*> myGlContexts;

      DtIndirectLog& myIndirectLog;
   };
}