# man > bdftruncate(1)

[_bdftruncate_(1)](https://www.chedong.com/phpMan.php/man/bdftruncate/1/markdown)                         General Commands Manual                        [_bdftruncate_(1)](https://www.chedong.com/phpMan.php/man/bdftruncate/1/markdown)

## NAME
       bdftruncate - generate truncated BDF font from ISO 10646-1-encoded BDF font

## SYNOPSIS
       **bdftruncate _**threshold_ **< _**source.bdf_ **> _**destination.bdf_

## DESCRIPTION
       **bdftruncate  **allows  one to generate from an ISO10646-1 encoded BDF font other ISO10646-1 BDF
       fonts in which all characters above a threshold code value are stored unencoded.  This is of‐
       ten desirable because the Xlib API and X11 protocol data  structures  used  for  representing
       font metric information are extremely inefficient when handling sparsely populated fonts.

## EXAMPLE
       The command
              bdftruncate 0x3200 < 6x13.bdf > 6x13t.bdf
       will generate the file 6x13t.bdf in which all glyphs with codes >= 0x3200 will only be stored
       unencoded (i.e., they are encoded at codepoint -1).

## SEE ALSO
       [**ucs2any**(1)](https://www.chedong.com/phpMan.php/man/ucs2any/1/markdown)

## AUTHOR
       **bdftruncate **was written by Markus Kuhn.

       Branden Robinson wrote this manual page, originally for the Debian Project.

X Version 11                               font-util 1.3.1                            [_bdftruncate_(1)](https://www.chedong.com/phpMan.php/man/bdftruncate/1/markdown)