[Mesa-dev] llvmpipe vs fbo-alphatest-formats

[Brian Paul]

On Fri, Dec 30, 2011 at 1:13 PM, Dave Airlie <airlied at gmail.com> wrote:
>>> The fbo-blending-formats test now only fails on I8 with DST_ALPHA,
>>> I'm
>>> guessing what happens is we have an I8 dst, but we never flush the
>>> tiles, so we end up using the alpha from the tile as the dst alpha
>>> value instead of the red value.
>
> Okay I've taken your suggestion, and the attached patch seems
> sufficient to fix the fbo-blending-formats test in all its variants on
> llvmpipe.

You might want to check out commit
a7109a31999f78a1184346f423a8df15be18d570 to softpipe which fixed
blending into non RGBA surfaces.  I think it also fixed alpha test
too.  I may not be able to look at this for a few days, but it may be
a similar issue.

-Brian