On Fri, 21 Sep 2001 23:28:50 +0200, Peter Surda wrote:
> I vaguely remember that for mga you can use /dev/mga_vid. I think there is a
> generic interface somewhere in X but don't know where.
The /dev/mga_vid is a specific device that belongs to a kernel driver which
you can use to directly access any matrox card. That driver is *not* in the
official kernel tree but you can get it somewhere from the net. Yet as far
as I know it is quite outdated. There is a project which is called TELETUX
and hosted at sourceforge (teletux.sf.net) that provides all necessary
functionality (including vsync). The only problem is that if you use it you
by-pass XFree entirely and every window that's in the area of the overlay
won't show up because it is overwritten in the video ram. So it is not very
useful for what I wanted to do. :-(
> What card do you have?
Matrax G400 MAX (and quite happy with the DH stuff *grin*)
> gpg --send-key [EMAIL PROTECTED] --keyserver certserver.pgp.com
> or better yet, define a keyserver in ~/.gnupg/options, then gpg will download
> automagically any keys if necessary, works well under mutt too.
Thanks for the hint but I have a key server specified. (wwwkeys.nl.pgp.net)
And mutt is set up properly. *grin*
Back to the original topic again. :) As Mark Vojkovich kindly pointed out, X
does not provide any way to check the vsync pulse. :( Just a few dri drivers
implement that functionality for OpenGL usage - but really, only a few. What
brings me to my question: if it is indeed possible for the dri people to
implement that feature why can't we put it in the XVideo protocol too? As I
understand it, direct access to the video card is necessary as well as its
interrupt. The dri drivers run in kernel space and do have access to those
kind of informations. Now maybe, just maybe, couldn't we implement some sort
of feedback from the dri drivers to the XVideo protocol which is only used
if dri is present and that information available? I am not an expert on this
but I think this would indeed be possible, wouldn't it? I consider video
output sync with the vsync pulse as quite important, especially if you wanna
watch high-quality video material on your home computer. :(
Just my two cents naturally. :-)
--
So long, Matt ]) [EMAIL PROTECTED], GPG key available at public keyservers ([
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