[Mesa-dev] DEFAULT_SOFTWARE_DEPTH_BITS=31

[Brian Paul]

On 11/06/2013 12:34 PM, burlen wrote:
> When I build osmesa with --with-osmesa-bits=32 I notice that I get 31
> bits by way of the compile line define -DDEFAULT_SOFTWARE_DEPTH_BITS=31.
> What's the story with the number 31? Is 31 bits really better than 32?

IIRC, 32 bit Z never worked properly because of float->int conversion 
problems and such.  I think I found that 31 bits worked though.  It's 
been a long time...

-Brian