Re: XFree86 5.0 TODO

> > Its superior to the alternative of not doing it at all.
> 
> I'll argue that preventing a second pass at copying the data is not a 
> legitimate reason to keep DGA if the mechanisms provided in a non-DGA 
> solution allow two copies to be done faster than the single copy by DGA.

For TV overlay a second copy isnt doable. Its too much overhead, especially
on old boxes.

> > Its also at least as safe as DRI on most x86 processors
> 
> It might be as secure, but the possibility of accidental hangs is much 
> higher.  The DRI coordinates all hardware access at the driver level and 
> doesn't require any cooperation from the application itself.  However, 
> DGA requires the application to use the interface properly or risk 
> hanging the graphics engine.

Which makes it at least as safe as DRI on most x86 processors, since you
can hang many x86 CPUs given access to uncached pages.

Alan