NAME

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

SYNOPSIS

          #include <tiffio.h>

       TIFFExtendProc TIFFSetTagExtender(TIFFExtendProc extender)

DESCRIPTION

       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 Defining Application Tags.

       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.

SEE ALSO

       libtiff (3tiff), Defining New TIFF Tags (3tiff), TIFFMergeFieldInfo (3tiff)

AUTHOR

       LibTIFF contributors

COPYRIGHT

       1988-2025, LibTIFF contributors

4.5                                               Sep 24, 2025                         TIFFSETTAGEXTENDER(3tiff)