DtDiGuyOsgGraphicsTexture.h

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


#pragma once

#include <vrvDiGuy/vrvDiGuy.h>

#include <diguyGraphicsTexture.h>

#include <osg/Image>
#include <osg/StateSet>
#include <osg/Texture2D>

#include <atomic>

namespace makVrv
{

   class DtDe;

   class DT_DLL_VRVDIGUY DtDiGuyOsgGraphicsTexture : public diguyGraphicsTexture
   {
   public:

      DtDiGuyOsgGraphicsTexture( void* internal_data );
      virtual ~DtDiGuyOsgGraphicsTexture();

   private:

      DtDiGuyOsgGraphicsTexture( const DtDiGuyOsgGraphicsTexture& ) = delete;

      DtDiGuyOsgGraphicsTexture& operator = ( const DtDiGuyOsgGraphicsTexture& ) = delete;

   public:

      virtual void asynchronous_post_load() override;

      virtual void build() override;
      virtual void unbuild() override;

      // needed for particle rendering
      virtual void bind_now( diguyTextureMapType texture_type );

      osg::Texture2D* texture() { return m_texture.get(); }
      void releaseGLObjects();

      static void setCurrentStateForTextureBind( osg::State* state ) { sm_state = state; }

      static int numActiveTextures() { return theTotalCounter.myCount; }

   public:

      typedef std::vector<DtDiGuyOsgGraphicsTexture*> TextureList;

      static osg::ref_ptr<osg::State> sm_state;

      // FIXME: should refactor to rooted singleton pattern
      static TextureList s_textures;

   protected:

      struct TotalCounter
      {
         TotalCounter();
         virtual ~TotalCounter();
         std::atomic<int> myCount;
      };

      static bool theTrackObjects;
      static TotalCounter theTotalCounter;

      osg::ref_ptr<osg::Texture2D> m_texture;
      osg::ref_ptr<osg::Image> m_image;

      int myId = 0;

   };

}

// Create function declaration.
// Declare a subclass creation function that will be registered with the DI-Guy Graphics API.
diguyGraphicsTexture* diguyOsgGraphicsTexture_create_func( void* internal_data );