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From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 89012] Incorrect behaviour of half_pixel_center = 0 rasterizer setting on R600 and SI
Date: Sun, 08 Mar 2015 07:34:28 +0000	[thread overview]
Message-ID: <bug-89012-502-KJZwbsGAaa@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-89012-502@http.bugs.freedesktop.org/>


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https://bugs.freedesktop.org/show_bug.cgi?id=89012

--- Comment #4 from Axel Davy <axel.davy@ens.fr> ---
With additional tests, we found out the problem comes out from the barycentric
coordinates. On one of the triangle, one barycentric coordinate is very
slightly below the expected value. It's not just on some pixels, but on all the
pixels of the triangle.

We also tested on an r600 card (hd3650), and the bug is the same. However for
SI and R600, the handling of the barycentric interpolation seems to have
evolved a lot.

Could it be some state that has been forgotten in the doc, that would specify
barycentric coordinates rounding ?

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  parent reply	other threads:[~2015-03-08  7:34 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-06 16:06 [Bug 89012] Incorrect behaviour of half_pixel_center = 0 rasterizer setting on R600 and SI bugzilla-daemon
2015-02-06 16:07 ` bugzilla-daemon
2015-02-06 16:31 ` bugzilla-daemon
2015-02-06 16:50 ` bugzilla-daemon
2015-02-06 16:51 ` bugzilla-daemon
2015-02-24 18:30 ` bugzilla-daemon
2015-03-08  7:34 ` bugzilla-daemon [this message]
2015-03-21 14:26 ` bugzilla-daemon
2015-03-21 15:00 ` bugzilla-daemon
2015-03-24 13:32 ` bugzilla-daemon
2015-03-24 13:38 ` [Bug 89012] Incorrect interpolation " bugzilla-daemon
2015-03-31 21:59 ` bugzilla-daemon

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