DtOculusSwapChain.h

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/******************************************************************************
** Copyright (c) 2021 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include "vrvVirtualReality/vrvVirtualReality.h"
#include "vrvVirtualReality/DtSwapChain.h"

#include "OVR_CAPI.h"

#include <map>

namespace makVrv
{
   class DtDe;

   class DT_DLL_VRVVR DtOculusSwapChain : public DtSwapChain
   {
   private:
      DtOculusSwapChain();

      DtOculusSwapChain(const DtOculusSwapChain& orig);

      DtOculusSwapChain& operator=(const DtOculusSwapChain&);

   public:
      DtOculusSwapChain(DtDe& de, vrvVirtualReality::DtEye eye, ovrSession session);

      virtual ~DtOculusSwapChain();

      virtual bool initalise(unsigned int width, unsigned int height, unsigned int layers, DtSwapChainTextureType type, DtGlImageType format);

      bool addFormat(DtSwapChainTextureType type, DtGlImageType format);

      virtual void acquireTextures();

      virtual unsigned int getTexture(DtSwapChainTextureType type, int index) const;

      virtual void releaseTextures();

      void blitTextureToScreen(int swidth, int sheight, bool showleftEye);

      //
      // Varjo specific

      ovrTextureSwapChain getSwapChain(DtSwapChainTextureType type) const;

      ovrTextureFormat_ getOculusFormat(DtGlImageType format) const;

   protected:
      ovrSession myOculusSession;
      mutable std::map<DtSwapChainTextureType, ovrTextureSwapChain> mySwapChains;
      mutable GLuint myMirrorFbo;
      mutable ovrMirrorTexture myMirrorTexture;
      bool myIsMirroringLeft;
   };
}