Oh well. Feel free to patch it.
It works on the output of bitmap(1), is good enough for most people who want
to draw their own x-faces. They certainly ought to have _something_ more
useful than the 27 line README file that comes with the package...
> In my AIcons library (Anthonys X Window Icon Library)
> http://www.sct.gu.edu.au/~anthony/icons/
> support scripts area
> http://www.sct.gu.edu.au/~anthony/icons/support/scripts/
> I have a Shell script using the PBMplus or NetPbm Image Tools to
> convert from the variable X bitmap format to the pbmplus bitmap
> format for easier conversion.
thanks for the reference, I'll poke around some time...
> =======8<--------CUT HERE----------axes/crowbars permitted---------------
...
> # compressed bitmap for use in the mail X-Face header. Requires some
> # bitmap filters from the pbmplus package, and the compface program
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Principal disadvantage highlighted. Perl is more common than pbmplus.
Stig