Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!ucsd!ucbvax!AERO36.LARC.NASA.GOV!blbates
From: blbates@AERO36.LARC.NASA.GOV (Brent Bates ViGYAN AAD/TAB)
Newsgroups: comp.sys.sgi
Subject: Re:  icut and RGB mode
Message-ID: <9102281458.AA12198@aero36.larc.nasa.gov>
Date: 28 Feb 91 14:58:20 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 16


  When using icut (scrsave) it doesn't matter what mode the windows you
are saving are in.  Scrsave uses gl_readscreen, currently an undocumented
routine, which returns rgb values no matter what mode you're in.
  There is a known problem with gl_readscreen, if you try to save a full
screen width, 1280 pixels, the information returned by gl_readscreen is
garbaged.  The temporary fix for this is save images less than 1280 pixels
wide.  Hopefully, gl_readscreen will be fixed in the next release and
become a "supported" and documented routine.

	Brent L. Bates
	NASA-Langley Research Center
	M.S. 361
	Hampton, Virginia  23665-5225
	(804) 864-2854
	E-mail: blbates@aero36.larc.nasa.gov or blbates@aero8.larc.nasa.gov