From: Stefan Berndtsson <stefan@nocrew•org>
To: "Michel Dänzer" <michel@daenzer•net>
Cc: linuxppc-dev@lists•linuxppc.org
Subject: Re: R128 Scaling.
Date: 16 Apr 2002 15:30:57 +0200 [thread overview]
Message-ID: <87662rrcry.fsf@hades.nocrew.org> (raw)
In-Reply-To: <1018963230.1590.2438.camel@tibook>
Michel Dänzer <michel@daenzer•net> writes:
> On Tue, 2002-04-16 at 13:49, Stefan Berndtsson wrote:
> >
> > When running XF4.2, without UseFBDev, scaling is no longer available, which
> > makes sense if it's a patch in the framebuffer.
>
> XFree86 4.2 does support scaling on its own, but you need to provide it
> the panel resolution, as should be visible in the log.
Ok.. I will have a look at that. I noticed all DGA using programs makes the
X-server crash when the programs exit, on your XF4.2.
> Or maybe it wrongly uses a 640 pitch? The virtual width is always 1024.
>
> This could be a bug either in the X driver's DGA support or xmame.
Could very well be. The DGA-hack is another patch floating around somewhere
that fixed some basic DGA stuff on the ibook2, but was known to crash
from time to time.
> Note that fullscreen doesn't require DGA per se. Direct framebuffer
> access is generally slow, xmame might be better off using normal X
> images or pixmaps and relying on an optimized ImageWrite acceleration in
> the driver.
I know you technically, don't need DGA for fullscreen, but afaik, MAME
supports -x11-mode 0 or 1, where 0 is window, and 1 is DGA. Comparing the
two on a stationary machine, where LCD-scaling isn't an issue, DGA is
faster in every case.
Also comparing small SDL-hacks in the same environment, DGA beats non-DGA
hands down.
/Stefan
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2002-04-16 13:30 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-16 11:49 R128 Scaling Stefan Berndtsson
2002-04-16 12:32 ` Adrian Cox
2002-04-16 12:53 ` Stefan Berndtsson
2002-04-16 13:12 ` Michel Dänzer
2002-04-16 13:55 ` Adrian Cox
2002-04-16 14:01 ` Geert Uytterhoeven
2002-04-16 14:13 ` Adrian Cox
2002-04-16 13:20 ` Michel Dänzer
2002-04-16 13:30 ` Stefan Berndtsson [this message]
2002-04-16 13:40 ` Michel Dänzer
2002-04-16 13:46 ` Stefan Berndtsson
2002-04-17 5:44 ` Ani Joshi
2002-04-17 11:54 ` Michel Dänzer
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