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<body><span class="vcard"><a class="email" href="mailto:idr@freedesktop.org" title="Ian Romanick <idr@freedesktop.org>"> <span class="fn">Ian Romanick</span></a>
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<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - GL_ARB_ES3_compatibility and std140 arrays"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71741">bug 71741</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - GL_ARB_ES3_compatibility and std140 arrays"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71741#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - GL_ARB_ES3_compatibility and std140 arrays"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71741">bug 71741</a>
from <span class="vcard"><a class="email" href="mailto:idr@freedesktop.org" title="Ian Romanick <idr@freedesktop.org>"> <span class="fn">Ian Romanick</span></a>
</span></b>
<pre>I am able to reproduce this on current 10.0 branch. It appears that the float
array is being packed as a vec4 array. I believe this is actually correct. By
rule #4 of the std140 packing:
(4) If the member is an array of scalars or vectors, the base alignment
and array stride are set to match the base alignment of a single
array element, according to rules (1), (2), and (3), and rounded up
to the base alignment of a vec4. The array may have padding at the
end; the base offset of the member following the array is rounded up
to the next multiple of the base alignment.
The important bit is "rounded up to the base alignment of a vec4."
Have you tried this on other OpenGL implementations?</pre>
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