something-fileformat
somethingtops
application/postscript
pstops
application/vnd.cups-postscript
cupsomatic
(constructs complicated
Ghostscript commandline
to let the file be processed by a
"-sDEVICE-s.th." call...)
pstoraster
(= "postscript interpreter")
application/vnd.cups-raster
rastertosomething
(= "raster driver")
something device specific
backend
Ghostscript at work....
Note, that cupsomatic "kidnaps" the printfile after the
application/vnd.cups-postscript stage and deviates it gh
the CUPS-external, systemwide Ghostscript installation, bypassing the
"pstoraster" filter (therefore also bypassing the CUPS-raster-drivers
"rastertosomething", and hands the rasterized file directly to the CUPS
backend...
cupsomatic is not made by the CUPS developers. It is an independent
contribution to printing development, made by people from
Linuxprinting.org. (see also http://www.cups.org/cups-help.html)