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<body><span class="vcard"><a class="email" href="mailto:rain.backnet+bugzilla_freedesktop@gmail.com" title="rain.backnet+bugzilla_freedesktop@gmail.com">rain.backnet+bugzilla_freedesktop@gmail.com</a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - setting texture filtering to nearest has no effect when anisotropy is greater than 1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91786">bug 91786</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Version</td>
<td>10.6
</td>
<td>11.1
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - setting texture filtering to nearest has no effect when anisotropy is greater than 1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91786#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - setting texture filtering to nearest has no effect when anisotropy is greater than 1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91786">bug 91786</a>
from <span class="vcard"><a class="email" href="mailto:rain.backnet+bugzilla_freedesktop@gmail.com" title="rain.backnet+bugzilla_freedesktop@gmail.com">rain.backnet+bugzilla_freedesktop@gmail.com</a>
</span></b>
<pre>This is still present in 11.1.2, in i965-va-driver. Some example screenshots
and code below:
Nearest neighbour, no anisotropy settings specified:
<a href="https://i.imgur.com/LadPw7T.png">https://i.imgur.com/LadPw7T.png</a> - note the clearly defined windows in the
foreground, but the banding in the building on the right.
As above but with anisotropy set to 16.0: <a href="https://i.imgur.com/9YiQi2S.png">https://i.imgur.com/9YiQi2S.png</a> -
note that the banding on the right is gone, but the nearest neighbour effect on
the nearby windows now looks like linear filtering.
Finally, with anisotropy explicitly set to 1.0: <a href="https://i.imgur.com/7ZckqqN.png">https://i.imgur.com/7ZckqqN.png</a>
- this is indistinguishable from the screenshot with no anisotropy set at all.
Other drivers (on Windows, OS X etc) render this scene correctly with
anisotropic filtering removing the banding while still showing nearest
neighbour filtering in the foreground, I can provide comparable screenshots if
that would be useful.
Relevant parameters to reproduce:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_NEAREST_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
// anything other than 1.0f below disables the nearest neighbour filtering
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, 16.0f);</pre>
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