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- From: kaf@hpfcso.FC.HP.COM (Keith Fish)
- Date: Fri, 11 Dec 1992 22:16:15 GMT
- Subject: Re: HP 720 Video access?
- Message-ID: <107270003@hpfcso.FC.HP.COM>
- Organization: Hewlett-Packard, Fort Collins, CO, USA
- Path: sparky!uunet!usc!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpfcso!kaf
- Newsgroups: comp.graphics
- References: <arM=Lg=@engin.umich.edu>
- Lines: 24
-
-
- > A friend and I are doing a project for our graphics class aiming toward
- > fast, user-controlled movement through a 3D maze. We have versions written
- > on the RS/6000 and Sun IPX, but neither is quite fast enough for our tastes.
- > We would like to port the code over to the HP720, but we can't seem to find
- > any info on accessing the machine's video directly. We don't want to use
- > X (too slow), and aren't using any special graphics functions...everything
- > is either copied into a buffer and sent to video (RS/6000), or written
- > directly to video.
-
- Excuse my ignorance, but does "written directly to video" == "written directly
- to the frame buffer"? If these statements are the same, then read on ...
-
- > If anyone can direct me to info on how to do this on the 720, or know of a
- > program that does it (and has source available!), please let me know.
-
- I'm suprised you think X is too slow. Have you alrady tried it?
- Using X and doing client/server communication through shared memory
- (versus sockets) should be pretty darn fast. (I *believe* setting
- DISPLAY=local:0.0 is one way to ensure this?) Another alternative is to
- use HP's Starbase graphics library to simply [dc]block_write() your data
- to a graphics window. You should find a Starbase base example in
- /usr/lib/starbase/demos (boxes.c).
-
-