DtLoadImageOnDemandCallback1D.h

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

#pragma once

#include <osg/Texture1D>
#include <string>

namespace makVrv
{
   class DtLoadImageOnDemandCallback1D : public osg::Texture1D::SubloadCallback
   {
   public:
      DtLoadImageOnDemandCallback1D(const osg::Image& originalImage,
         osg::Texture::InternalFormatMode mode,
         const std::string& parentFilePath);

      virtual ~DtLoadImageOnDemandCallback1D();
   private:
      DtLoadImageOnDemandCallback1D() = delete;

      DtLoadImageOnDemandCallback1D(const DtLoadImageOnDemandCallback1D&) = delete;

      DtLoadImageOnDemandCallback1D& operator=(const DtLoadImageOnDemandCallback1D&) = delete;
   public:

      virtual void load(const osg::Texture1D& texture, osg::State& state) const override;

      virtual void subload(const osg::Texture1D& texture, osg::State& state) const override;
   protected:

      const osg::Image::Origin myImageOrigin;

      const int myS, myT, myR;

      const GLint myInternalTextureFormat;
      const GLenum myPixelFormat;
      const GLenum myDataType;
      const osg::Texture::InternalFormatMode myMode;

      std::string myFileName;
      
      const unsigned int myPacking;
   };

}