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@@ -163,6 +163,7 @@ See the <a href="xlibdriver.html">Xlib software driver page</a> for details.
<li>blorp - emit messages about the blorp operations (blits &amp; clears)</li>
<li>nodualobj - suppress generation of dual-object geometry shader code</li>
<li>optimizer - dump shader assembly to files at each optimization pass and iteration that make progress</li>
+ <li>vec4 - force vec4 mode in vertex shader</li>
</ul>
</ul>