DtOsgOverlayResourceProvider.h

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/******************************************************************************
** Copyright (c) 2023 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


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

#include <vrvGraphics/DtOverlayResourceProvider.h>

#include <vrvUtil/DtVirtualBaseClass.h>

namespace osg
{
   class State;
}

namespace makVrv
{
   class DtGlRenderTexture;
   class DtOsgRenderer;
   class DtTextureInterFace;

   class DT_DLL_VRVOSG DtOsgOverlayResourceProvider : public DtOverlayResourceProvider
   {
   public:

      friend class DtOsgOverlayResourceProviderCreator;

      virtual ~DtOsgOverlayResourceProvider();

      DtOsgOverlayResourceProvider() = delete;

      DtOsgOverlayResourceProvider(
         const DtOsgOverlayResourceProvider& other) = delete;

      DtOsgOverlayResourceProvider(
         const DtOsgOverlayResourceProvider&& other) = delete;

      DtOsgOverlayResourceProvider& operator=(
         const DtOsgOverlayResourceProvider& other) = delete;

      DtOsgOverlayResourceProvider& operator=(
         const DtOsgOverlayResourceProvider&& other) = delete;

   public:

      virtual void releaseResources();

      virtual void setState(osg::State* myState);

      virtual void setCurrentSceneDepthTextureId(unsigned int id);

      virtual unsigned int currentSceneDepthTextureId() const override;

      virtual void setCurrentSceneOcclusionTextureId(unsigned int id);

      virtual unsigned int currentSceneOcclusionTextureId() const override;

      // ! get the 1d texture object id
      virtual unsigned int texture1DId(DtTextureInterface* textureInterface ) const override;

      // ! get the 2d texture object id
      virtual unsigned int texture2DId(DtTextureInterface* textureInterface ) const override;

      virtual unsigned int getStippleTexture(const unsigned int stipplePattern[32]) override;

   protected:

      DtOsgOverlayResourceProvider(DtOsgRenderer& renderer, bool forceTextShaping);

      virtual unsigned int textureId(DtTextureInterface* textureInterface ) const;

   protected:

      osg::State* myState;

      unsigned int mySceneDepthTextureId;
      unsigned int mySceneOcclusionTextureId;

      struct StippleKey
      {
         unsigned int key[32];
         bool operator<(const StippleKey& b) const;
      };

      typedef std::map<StippleKey, unsigned int> StippleTextureMap;
      StippleTextureMap myStippleTextureMap;
      float myStippleMaxTextureAnisotropy;
   };



   class DT_DLL_VRVOSG DtOsgOverlayResourceProviderCreator : public DtVirtualBaseClass
   {
   public:
      DtOsgOverlayResourceProviderCreator();

      virtual ~DtOsgOverlayResourceProviderCreator();

      DtOsgOverlayResourceProviderCreator(
         const DtOsgOverlayResourceProviderCreator& other) = delete;

      DtOsgOverlayResourceProviderCreator(
         const DtOsgOverlayResourceProviderCreator&& other) = delete;

      DtOsgOverlayResourceProviderCreator& operator=(
         const DtOsgOverlayResourceProviderCreator& other) = delete;

      DtOsgOverlayResourceProviderCreator& operator=(
         const DtOsgOverlayResourceProviderCreator&& other) = delete;

   public:
      virtual DtOsgOverlayResourceProvider* create(
         DtOsgRenderer& renderer, bool forceTextShaping) const;

      static DtOsgOverlayResourceProviderCreator& instance(DtDe& de);

      static const std::string& theClassName();
   };
}