Re: [Mesa3d-users] PocketPC support

[<rjf...@at...>]

Yeah, FPU thing can be a bit of a drag. All
my graphics apps on the PocketPC turned out to
be fill bound, never transform bound. On the
Cassiopeia at least, a cache line miss is like
virtual memory on a PC.  The amount of memory
was not a real problem (most folks doing real
work on them have 64MB or more RAM), but its 
speed is a killer (e.g. executing out of a CF
card).  Suffice to say I eventually got about
4-5M voxels/sec with depth buffered shear-warp
variants before shelving the project(actually, 
the weekend came to a close).  I now use a CF
802.11b card to do volume rendering on my 
PocketPC :) ...  
> Pretty funny, I also work on Volume rendering on PocketPCs!
> I am interested in any OpenGL and/or volume rendering stuff related to 
> Pocket PCs.
> The fact about Mesa on PocketPC is not the basic operations of drawing
> in a buffer. The problem is that PocketPCs do not have a FPU. They are
> really slow at computing floating points.
> Did anyone work on fixed point implementation?
> 
> William
> 
> rjf...@at... wrote:
> 
> >Actually, a basic OSMesa port is pretty trivial.  
> >I did one some time ago as part of the OSMesa work 
> >in one afternoon.  The only part I did not do is 
> >the "wgl" emulation.  So, you could create an 
> >OSMesa context and point it at the display buffer 
> >(either the windows bitmap content or the buffer 
> >exposed by the gaming API, both work).  Enough of 
> >a port to meet my needs. I did not bother supporting 
> >8bit PDAs.  
> >
> >If anyone is really interested, I could try to track 
> >down the project again and contribute add it back to
> >Mesa, assuming I can find the project again.  I used 
> >it to port some volume rendering applications my
> >PocketPC.  The memory heirachy on these PDAs can
> >seriously impact rendering performance however. 
> >Staying in the cache is extremely critical on these
> >devices...
> >
> >>Ekkla Research did. But It's not trivial at all. Months of 
> >>customisation! Thus, we have to charge for the port in order 
> >>to recover from the work cost.
> >>See http://www.ekkla-research.com/
> >>
> >>William
> >>
> >>>I know that this might sound weird and crazy... but has 
> >>>
> >>anybody tried to 
> >>
> >>>compile Mesa for PocketPC/WinCE?
> >>>
> >>>-- 
> >>>_____________________________________________________________
> >>>Emmanuel Fre'con                 
> >>>
> >>http://www.sics.se/~emmanuel/
> >>
> >>>
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