25 Sep
2002
25 Sep
'02
2:47 p.m.
On Wed, Sep 25, 2002 at 06:12:31 +0200, Tim Goetze wrote:
There is a copy-on-next-vert-refresh call in X, I think. Part of the dbe
extension.
I dont think I can use it with FLTK though, as I can't find a way of
drawing onto an non-screen surface and then using the dbe.
Its probably just a bad choice of toolkit. GDK and SDL seem to be able to
do it.
- Steve
> I seem to
remeber that on the Amiga and in GL I could issue a call to wait
> for the next vertical blank, forcing the redraw to be in sync with the
> video hardware. Is there an equivalent in FLTK or X?
>
> How do other people get round this?
i'd look at the GL kernel support sites, they might have a patch that
creates some sort of a '/dev/retrace', or add it to GLX. with vanilla
linux/X there's no way to do this except busy-wait reading inb
(0x3da) afaik.