[Dri-devel] blend color...

[Roland Scheidegger]

Ok, I was wrong that the radeon driver also doesn't implement this 
correctly. It just always uses a fallback, it just doesn't support it in 
hardware. That said, I'm wondering what's the purpose of announcing 
ARB_imaging support, at least out of the three blend extensions this 
includes (EXT_blend_color, EXT_blend_minmax, EXT_blend_subtract) two 
aren't supported at all and the third (blend_subtract) only half. 
Rasterization fallbacks are evil...
On the R200, the RB3D_BLENDCOLOR register works correctly. The color 
format seems to be RGBA8888 though, at least limited testing shows the 
values need to be supplied in that order (same as for other colors such 
as fog).

Roland
btw sorry for the new thread, but I don't have access to the old thread 
here.

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