DtSubmitOverlayCallback.h

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/****************************************************************************** 
** Copyright (c) 2019 MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 


#pragma once

#include "vrvVirtualReality/vrvVirtualReality.h"

#include <osg/Texture2D>
#include <osg/Camera>
#include <osg/Matrixd>

namespace makVrv
{
   class DtVirtualRealityDriver;

   class DT_DLL_VRVVR DtSubmitOverlayCallback : public osg::Camera::DrawCallback
   {
   private:
      DtSubmitOverlayCallback();

      DtSubmitOverlayCallback(const DtSubmitOverlayCallback& orig);

      DtSubmitOverlayCallback& operator=(const DtSubmitOverlayCallback&);

   public:
      DtSubmitOverlayCallback(osg::Texture2D* tex, DtDe& de, DtVirtualRealityDriver& driver);

      virtual ~DtSubmitOverlayCallback();

      virtual void operator()(osg::RenderInfo& renderInfo) const;


      virtual osg::Matrixd offsetMatrix();

      virtual void setOffsetMatrix(const osg::Matrixd& mat);

      virtual void setFlipOverlay(bool flip);

      virtual bool flipOverlay() const;

      virtual void setEnabled(bool enable);

      // ! \brief has the callback initalised properly
      bool isInitialized() const;
             
   protected:

      virtual void submitOverlay(osg::RenderInfo& renderInfo) const = 0;

      DtDe& myDe;
      DtVirtualRealityDriver& myDriver;
      osg::ref_ptr<osg::Texture2D> myOverlayTexture;
      osg::Matrix myOffsetMatrix;
      bool myFlipOverlay;
      bool myEnabled;

      // ! used to flag the contructor initalised everything successfully
      bool myIsInitialized;
   };
}