TIFFSETDIRECTORY(3tiff)             LibTIFF            TIFFSETDIRECTORY(3tiff)

NAME
       TIFFSetDirectory - set the current directory for an open TIFF file

SYNOPSIS

          #include <tiffio.h>

       int TIFFSetDirectory(TIFF *tif, tdir_t dirnum)

       int TIFFSetSubDirectory(TIFF *tif, uint64_t diroff)

DESCRIPTION
       TIFFSetDirectory() changes the current directory and reads its contents
       with TIFFReadDirectory().  The parameter dirnum specifies the
       subfile/directory as an integer number, with the first directory
       numbered zero.  TIFFSetDirectory() only works with main-IFD chains
       because allways starts with the first main-IFD and thus is able to
       reset the SubIFD reading chain to the main-IFD chain.

       TIFFSetSubDirectory() acts like TIFFSetDirectory(), except the
       directory is specified as a file offset instead of an index; this is
       required for accessing subdirectories linked through a SubIFD tag.
       (see MultiPage SubIFD)

       Directory query functions TIFFCurrentDirectory(),
       TIFFCurrentDirOffset(), TIFFLastDirectory() and
       TIFFNumberOfDirectories() retrieve information about directories in an
       open TIFF file. Be aware that until a directory is not written to file
       AND read back, the query functions won't retrieve the correct
       information!

RETURN VALUES
       On successful return 1 is returned. Otherwise, 0 is returned if dirnum
       or diroff specifies a non-existent directory, or if an error was
       encountered while reading the directory's contents.

DIAGNOSTICS
       All error messages are directed to the TIFFErrorExtR() routine.

       "%s: Error fetching directory count":
          An error was encountered while reading the "directory count" field.

       "%s: Error fetching directory link":
          An error was encountered while reading the "link value" that points
          to the next directory in a file.

SEE ALSO
       TIFFquery (3tiff), TIFFOpen (3tiff), TIFFCreateDirectory (3tiff),
       TIFFCustomDirectory (3tiff), TIFFWriteDirectory (3tiff),
       TIFFReadDirectory (3tiff), Multi Page / Multi Image TIFF, libtiff
       (3tiff)

AUTHOR
       LibTIFF contributors

COPYRIGHT
       1988-2022, LibTIFF contributors

4.6                            September 8, 2023       TIFFSETDIRECTORY(3tiff)