TIFFSetTagExtender - register the merge function for user defined tags as an extender callback with

       LibTIFF contributors

       1988-2022, LibTIFF contributors

4.7                                               Apr 30, 2025                         TIFFSETTAGEXTENDER(3tiff)

TIFFSetTagExtender() is used to register the merge function for user defined tags as an extender callback
       with libtiff.  A brief description can be found at DefiningApplicationTags.

       NOTE:TIFFSetTagExtender() cannot be used to extend custom directories  (for  example  EXIF,  GPS  or  other
          custom directories).  Only the TIFF directory can be extended with additional tags.

       TIFFSetTagExtender  -  register  the  merge  function  for user defined tags as an extender callback with
       libtiff

libtiff (3tiff), DefiningNewTIFFTags (3tiff), TIFFMergeFieldInfo (3tiff)

          #include <tiffio.h>

       TIFFExtendProcTIFFSetTagExtender(TIFFExtendProcextender)