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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - i965: Using EWA algorithm for isotropic case"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82463#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - i965: Using EWA algorithm for isotropic case"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82463">bug 82463</a>
from <span class="vcard"><a class="email" href="mailto:itoral@igalia.com" title="Iago Toral <itoral@igalia.com>"> <span class="fn">Iago Toral</span></a>
</span></b>
<pre>(In reply to Iago Toral from <a href="show_bug.cgi?id=82463#c8">comment #8</a>)
<span class="quote">> For reference, the proposed patch was discussed in the mesa-dev mailing list:
> <a href="http://lists.freedesktop.org/archives/mesa-dev/2014-August/065332.html">http://lists.freedesktop.org/archives/mesa-dev/2014-August/065332.html</a></span >
The patch was dropped because it regressed a bunch of piglit tests. I have run
piglit again with this patch and this still happens. The list of regressed
tests is:
tex-miplevel-selection textureprojgradoffset 1d_projvec4
tex-miplevel-selection textureprojgrad 2d_projvec4
tex-miplevel-selection *gradarb 2d
tex-miplevel-selection textureprojgrad 1d
tex-miplevel-selection texturegradoffset 1d
tex-miplevel-selection textureprojgradoffset 2d
tex-miplevel-selection texturegrad 1d
tex-miplevel-selection textureprojgrad 1d_projvec4
tex-miplevel-selection textureprojgradoffset 1d
tex-miplevel-selection *projgradarb 1d_projvec4
tex-miplevel-selection *projgradarb 1d
tex-miplevel-selection texturegradoffset 1darray
tex-miplevel-selection texturegradoffset 2darray
tex-miplevel-selection *gradarb 1d
tex-miplevel-selection texturegrad 1darray
tex-miplevel-selection *projgradarb 2d
tex-miplevel-selection texturegrad 2d
tex-miplevel-selection textureprojgradoffset 2d_projvec4
tex-miplevel-selection *projgradarb 2d_projvec4
tex-miplevel-selection textureprojgrad 2d
tex-miplevel-selection texturegradoffset 2d
tex-miplevel-selection texturegrad 2darray
In the cases where this fails the reported problem is related with a wrong
texture level selection (off by one level in all failed cases):
Failure:
Expected level: 1
Observed level: 2
Fetch level: 0, baselevel: 0, maxlevel: 2, minlod: 0, maxlod: 4, bias: 1,
mipfilter: yes
This happens in ~101 out of 2637 test cases in each of the reported tests.</pre>
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