DtSubmitVarjoOverlayCallback.h

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/******************************************************************************
** Copyright (c) 2020 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/

#pragma once


#define VARJO_USE_TEXTURE_ARRAYS 0

#include "vrvVirtualReality/vrvVirtualReality.h"
#include "vrvVirtualReality/DtSubmitOverlayCallback.h"

#include <Varjo.h>
#include <Varjo_events.h>
#include <Varjo_layers.h>
#include <Varjo_mr.h>
#include <Varjo_gl.h>

namespace makVrv
{
   class DtVarjoProvider;

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

      virtual ~DtSubmitVarjoOverlayCallback();

   private:
      DtSubmitVarjoOverlayCallback();

      DtSubmitVarjoOverlayCallback(const DtSubmitVarjoOverlayCallback& orig);

      DtSubmitVarjoOverlayCallback& operator=(const DtSubmitVarjoOverlayCallback&);

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

      virtual void setFlipOverlay(bool flip);

      virtual void setEnabled(bool enable);

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

      virtual void copyTextureToSwapChain(osg::Texture2D* texture, varjo_SwapChain* swapchain, osg::RenderInfo& renderInfo) const;

      virtual bool initSwapChain() const;

      virtual unsigned int nextSwapImage() const;

   protected:

      DtVarjoProvider* myProvider;
      varjo_Session* myVarjoSession;

      int myWidth;
      int myHeight;


      mutable bool mySwapChainsInitialized;
      mutable varjo_SwapChain* myColorSwapChain;
      mutable varjo_SwapChain* myBlankSwapChain;
      mutable int mySwapChainLength;

      int myDisplayEyeMask;
   };
}