DtIndirectTextureResidencyManager.h

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


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

#include <vrvOsg/DtOsgThreadingUtils.h>

#include <vrvUtil/DtVirtualBaseClassCreator.h>

#include <vrvUtil/DtSignalConnectionManager.h>

#include <set>
#include <unordered_map>

#include <tbb/concurrent_unordered_set.h>

namespace makVrv
{
   class DtIndirectGlTextureObjectManager;
   class DtIndirectGlTextureObject;

   class DtIndirectGraphicsContextData
   {
   public:
      unsigned int myLastFrameUpdated = -1;
      std::unordered_set<DtIndirectGlTextureObject*> myTexturesToBeMarkedNonResident;
   };

   enum DtIndirectTextureResidencyOperation
   {
      MAKE_RESIDENT = 0, MAKE_NON_RESIDENT = 1
   };


   class DtIndirectTextureResidencyManager;

   typedef DtVirtualBaseClassCreator<DtIndirectTextureResidencyManager, DtIndirectGlTextureObjectManager&> DtIndirectTextureResidencyManagerCreator;

   template <>
   inline const char* creatorTypeName<DtIndirectTextureResidencyManager>(void) { return "DtIndirectTextureResidencyManager"; }

   class DT_DLL_VRVOSG DtIndirectTextureResidencyManager : public DtVirtualBaseClass
   {
   public:
      friend DtIndirectTextureResidencyManagerCreator;

      virtual ~DtIndirectTextureResidencyManager();

   protected:
      DtIndirectTextureResidencyManager(DtDe& de, DtIndirectGlTextureObjectManager& parent);

   private:
      DtIndirectTextureResidencyManager() = delete;
      DtIndirectTextureResidencyManager(DtIndirectTextureResidencyManager&) = delete;
      DtIndirectTextureResidencyManager& operator=(DtIndirectTextureResidencyManager&) = delete;
   public:
      virtual void run(unsigned int frameNumber);

      virtual void addToQueueToMakeNonResidentInAllGraphicsContexts(DtIndirectGlTextureObject* indirectGlTextureObject);

      virtual void printStatsWhenNoWindows();

   protected:
      virtual void deleteGlTexture(const DtIndirectGlTextureObject* indirectGlTextureObject);

      virtual void runResidencyOperation(const void* glContext, DtIndirectTextureResidencyOperation operation);

      virtual void runMakeNonResidentOnTexturesInNonResidentQueue(const void* glContext);

      virtual bool isInAnyContextForMarkingNonResident(const void* currentGlContext, DtIndirectGlTextureObject* indirectGlTexture);

      virtual void slot_contextAboutToBeDestroyed(const void* glContext);

   protected:
      DtIndirectGlTextureObjectManager& myParent;

      DtDe& myDe;

      std::unordered_map<const void*, DtIndirectGraphicsContextData> myGlContextToData;

      tbb::concurrent_unordered_set<DtIndirectGlTextureObject*> myScatchPadSetForResidencyCollection;

      DtSignalConnectionManager myConnections;
   };
}