R128 Scaling.

Michel Dänzer michel at daenzer.net
Tue Apr 16 23:40:31 EST 2002

On Tue, 2002-04-16 at 15:30, Stefan Berndtsson wrote:
> > 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.

Is that with a driver with optimized ImageWrite acceleration? I don't
think any stock XFree86 driver is really optimized there yet, I'm
working on radeon now and the results should be easily applicable to

Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member   /  CS student, Free Software enthusiast

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