tree 978bff42ccd93554de68f87da561f6b7a2bd9510
parent 9ef49cfd841a8cbf280a1a2b66ce90f710e44687
author Chris Forbes <chrisf@ijw.co.nz> 1372678255 +1200
committer Chris Forbes <chrisf@ijw.co.nz> 1373071314 +1200

i965: fix alpha test for MRT

Include src0 alpha in the RT write message when using MRT, so it is used
for the alpha test instead of the normal per-RT alpha value.

Fixes broken rendering in Dota2 under Wine [FDO #62647].

No Piglit regressions on Ivybridge.

V2: reuse (and simplify) existing sample_alpha_to_coverage flag in
the FS key, rather than adding another redundant one.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewd-by: Paul Berry <stereotype441@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=62647
NOTE: This is a candidate for the stable branches.