Re: DRI integration

On Fri, 2003-11-14 at 00:05, Keith Whitwell wrote:
> Lionel Ulmer wrote:
> > On Thu, Nov 13, 2003 at 03:39:33PM -0700, Brian Paul wrote:
> > 
> >>That said, there's nothing to prevent the development of a GLX 
> >>extension that might expose the framebuffer or off-screen image 
> >>buffers to clients via mmap'ing or some other technique.  Again, this 
> >>may not be feasible on some hardware.
> > 
> > 
> > A bit off topic, but well, said extension (if possible) would greatly help
> > us poor Wine developpers to handle the 'nice' possibilities of Direct3D
> > (where, basically, the 3D framebuffer is just another surface which the
> > application can write to directly). And, even worse, the same is the case
> > for the ZBuffer (which completely kills performance when emulating it using
> > GL).
> 
> I wonder how this works.  The radeon, for instance, doesn't have a linear 
> layout of the z buffer, so writing to it will not give expected results 
> (whatever those might be).

Linear access could probably be achieved with a surface translation
though.


-- 
Earthling Michel Dänzer      |     Debian (powerpc), X and DRI developer
Software libre enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer