[Mesa-dev] [Bug 71199] [llvmpipe] piglit glean polygonOffset regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71199

--- Comment #1 from Roland Scheidegger <sroland at vmware.com> ---
My guess would be the test is invalid.
The "mrd" meaning is very precise both in d3d10 and OpenGl, and we were being
sloppy there before - it really should be exactly one bit (for unorm depth
formats).
I quickly looked at the test and I don't quite understand what it does to find
the ideal mrd. I suspect the math doesn't work out somewhere because the float
math is right at the limits of depth buffer precision (24 bit in this case).
Do closed source drivers actually pass this (and if so I wonder what their
calculated ideal/actual mrd values are)?

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/mesa-dev/attachments/20131103/2dfdb047/attachment.html>