Re: [Dri-devel] Mesa demos/tests failures on rv250

[Roland S. <rsc...@hi...>]

Roland Scheidegger wrote:
> Ian Romanick wrote:
> 
>> Roland Scheidegger wrote:
>>
>>> pointblast: (both with hardware tcl and without) the points are
>>> almost invisible. IIRC this was already mentioned some time ago to
>>> be because all points are drawn with size 1 only.
>>
>>
>>
>> Right.  Could you try it again with this patch.  You may need some 
>> changes to get it to apply.  If this works, can somebody commit it?
>>
>> http://marc.theaimsgroup.com/?l=dri-devel&m=105862837814769&w=2
> 
> This patch is only for radeon though. Will try to make it work with
> r200, though if it's not similar I probably won't succeed...
Seems to be quite complicated. Though wouldn't it be a better idea to 
figure out why it doesn't work in the first place? R200/RV250 should 
support this, but apparently for some reason it doesn't work. According 
to r200_reg.h, the chip should also be able to handle ARB_point_sprite 
in hardware.
(ATI's linux driver exposes (for my 9000pro) ARB_point_parameters (and 
EXT_point_parameters), but not ARB_point_sprites, though I believe until 
very recently not even R300 cards got that extension supported. Point 
size range is from 1 to 2047, and pointblast works - no idea of course 
if really points are rendered, but it seems to be fast at least.)

Roland