Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!mailrus!umich!samsung!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpfcso!hpfcdq!elliott
From: elliott@hpfcdq.HP.COM (Ian Elliott)
Newsgroups: comp.windows.x
Subject: Re: DN10000 with 40 plane display & X11R4
Message-ID: <890046@hpfcdq.HP.COM>
Date: 11 Jul 90 09:05:52 GMT
References: <27944@pprg.unm.edu>
Organization: Hewlett-Packard - Fort Collins, CO
Lines: 22

>      HP/Apollo has donated a DN10000 with a 40 plane display to UNM and
> I am the poor sap managing it ;^).  I was wondering if anyone out there
> has modified X11R4 to take advantage of the 40 plane display and do 24-
> bit color on the DN10000?  And in general has anyone done 24-bit color
> on any display?

I'm sorry I can't answer about the DN10000, but I can hit the general
question.  As I recall from the Q&A session at the January X conference,
it sounded as if a few vendors have done 24-bit X11 on some of their
displays.  I know that the HP-UX TurboSRX and TurboVRX displays do, but
I don't know who the other vendor(s) was/were (sorry).  I believe that
it was at that meeting that Keith Packard (main server person at MIT)
said that MIT hasn't done it because the cfb-type code would be too
slow, and I think that for a lot of operations that claim would be true
(since you'd be doing 32-bits-per-pixel ops instead of 8-bits-per-pixel,
you can figure a roughly 4X decrease in performance).  With hardware
assisted rendering, the numbers can go up, but the cfb-type code doesn't
take advantage of such hardware features.



Ian Elliott