DtGlTextureUtils.h

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


#pragma once
#include <vrvGraphicsUtils/vrvGraphicsUtils.h>
#include <map>

namespace makVrv
{
   class DT_DLL_VRVGRAPHICSUTILS DtGLTextureUtils
   {
   public:
      typedef std::map<unsigned int, int> TexIDToCount;
      typedef std::map<void*, TexIDToCount> ContextToTexID;

   private:
      DtGLTextureUtils() = delete;
      DtGLTextureUtils(const DtGLTextureUtils&) = delete;
      DtGLTextureUtils& operator=(const DtGLTextureUtils&) = delete;
      virtual ~DtGLTextureUtils() = delete;
   public:
      static void makeResidentIfNecessary(void* gContext, GLuint textureID);

      static bool makeNonResidentIfNecessary(void* gContext, GLuint textureID, bool canDelete);

      static GLuint64 gpuTextureAddress(GLuint textureID);

      static bool isTexture(GLuint textureID);

   protected:
      static ContextToTexID theTextureCountByContext;
      static TexIDToCount theTextureCountAcrossContexts;
   };
}