CUPS in and of itself has this (general) filter chain (italic letters
are file-formats or MIME types, other are filters (this is
true for pre-1.1.15 of pre-4.3 versions of CUPS and ESP PrintPro):
something-fileformat
application/postscript
somethingtops
pstops
application/vnd.cups-postscript
pstoraster
application/vnd.cups-raster
rastertosomething
something-device-specific
backend
e.g. Gimp-Print filters
may be plugged in here
(= "raster driver")
ESP PrintPro has some enhanced "rastertosomething" filters as compared to
CUPS, and also a somewhat improved "pstoraster" filter.
NOTE: Gimp-Print and some other 3rd-Party-Filters (like TurboPrint) to
CUPS and ESP PrintPro plug-in where rastertosomething is noted.
as shipped with CUPS,
independent from any
GhostScript installation on the
system
(= "postscript interpreter")