RE: [AD] vsync and SVGAlib (was Problems: Grabber and windowing)

["Matt Witherspoon" <spoon@xxxxxxxxxx>]

Eric,
   Good stuff, that patch will work. Indeed the demo was flickering with me
as well (sorry didn't get back to your first message... busy with school).
This patch will certainly fix all those problems I was noticing as well.

  However, have you all concluded that documentation on the
show_video_bitmap & request_video_bitmap is sufficient? I still think it is
misleading because request_video_bitmap states "rather than waiting for a
retrace" which seems like it would have the opposite behavior of
show_video_bitmap (which, apparently, doesn't necessarily have to wait on
vsync either). Do you see what is a little confusing? Maybe I'm the only one
getting those confused, but if show_video_bitmap doesn't really have to wait
for vsync maybe it should be more obvious because I would have certainly
thought it would from the docs.   --Matt

-----Original Message-----
From: alleg-developers-admin@xxxxxxxxxx
[mailto:alleg-developers-admin@xxxxxxxxxx Behalf Of Eric
Botcazou
Sent: Monday, January 20, 2003 6:21 PM
To: alleg-developers@xxxxxxxxxx
Subject: Re: [AD] vsync and SVGAlib (was Problems: Grabber and windowing)

> The problem is that everything seems to work fine on my system: the demo
> doesn't  flicker at all when using page flipping with SVGAlib. So I want
> to further investigate, including to look into the SVGAlib sources.

I lied. The demo badly flickers too on my system. I've commited the
following
patch, which implements the method used in the scrolltest.c demo program of
SVGAlib 1.4.3 and does fix the flicker. Yeah!