Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!mcnc!unc!mcguffey
From: mcguffey@unc.cs.unc.edu (Michael McGuffey)
Newsgroups: comp.windows.x
Subject: Fast Screen Updates
Message-ID: <633@unc.cs.unc.edu>
Date: Wed, 17-Jun-87 11:38:58 EDT
Article-I.D.: unc.633
Posted: Wed Jun 17 11:38:58 1987
Date-Received: Sun, 21-Jun-87 09:45:18 EDT
Organization: CS Dept., U. of N. Carolina, Chapel Hill
Lines: 17


  Is there a way that I can load about 40MBytes of 8-bit medical images, 
randomly pick one to display, and have it come up on the screen in 2-5 seconds?

  The images are full screen images and currently take 20-40 seconds on a GPX.
I don't think the time is spent in paging but rather in sending the image
down the socket from the application to the X server.  Is this a correct
assumption?  I also thought about puting the images in offscreen memory somehow
and doing a fast BLT to the screen (I've seen some image display programs do
this), but 1 image is all I could probably fit offscreen.

  MAIN POINT OF THIS POSTING:
	Am I unaware of some X routine that does nice things like this?

--mike
mcguffey@dopey.cs.unc.edu
mcguffey@unc.csnet