Path: utzoo!attcan!uunet!seismo!sundc!pitstop!male!sun-barr!ames!purdue!tut.cis.ohio-state.edu!ucbvax!BRL.MIL!glennrp
From: glennrp@BRL.MIL (Glenn Randers-Pehrson, WMB)
Newsgroups: comp.sys.sgi
Subject: Re:  Screen Dump.
Message-ID: <8905031528.aa06411@TBD.BRL.MIL>
Date: 3 May 89 19:28:37 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: U.S. Army Ballistic Research Laboratory, APG, MD
Lines: 18


 > From: swenson@NUSC-WPN.ARPA
 > Subject: Screen Dump.
 > 
 > 	I would like to perform a screen dump from a 4D-60T to a file in
 > PostScript format to be sent to an Apple (alias Sun) LaserWriter printer.
 > I would like at least 16 (probably dithered) grey levels and the option to
 > select seperate windows or the entire screen to be dumped.  Am I in the
 > land of fantasy?  I would appreciate any suggestions on this subject.
 > Thanks.
 > 
	I've done it on a 2500T and 3130, in FORTRAN, 2 levels.  It uses
a run-length encoding of scan-lines  to save space.  I will
soon be porting the code to a 4D/220GTX.  If this is what you want, you
may have the source.  I have also done a QMS-QUIC screen dump, which
usually takes about 1/5 the disc space of the PostScript file.

Glenn Randers-Pehrson, US Army Ballistic Research Lab <glennrp@brl.mil>