DtIndirectVaoManager.h

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


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvUtil/DtVirtualBaseClass.h>

#include <osg/observer_ptr>

#include <map>

namespace osg
{
   class State;
   class GraphicsContext;
}

namespace makVrv
{
   class DtDe;
   class DtIndirectGeometry;
   class DtGlVaoManager;

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

      virtual ~DtIndirectVaoManager();
   protected:
      DtIndirectVaoManager(DtDe& de);

   private:
      DtIndirectVaoManager() = delete;
      DtIndirectVaoManager(const DtIndirectVaoManager&) = delete;
      DtIndirectVaoManager& operator=(const DtIndirectVaoManager&) = delete;
   public:

      virtual unsigned int getOrCreateAndRecordVAO(const osg::GraphicsContext* gc, bool rerecord = false);

      virtual void releaseGLObjects(const osg::GraphicsContext* gc);

   protected:
      virtual void recordVAO(unsigned int vao);

   protected:
      DtDe& myDe;
      
      DtGlVaoManager* myVaoManager;
   };
}