CJET filters printer data from stdin to stdout, converting HP PCL
 (Printer Command Language) escape sequences and data structures,
 e.g. font headers, to their CaPSL equivalents.
 .
 CaPSL stands for Canon Printing System Language. It is a set of
 control command developed for the Canon European Language Printer.
 CaPSL was used in Canon Export Models such as LBP-8markIII series and
 LBP-4series. Canon's older Japanese models (LBP-A404 GII etc. LIPS-III
 as default command) usually have CaPSL emulation mode.