an class="keyword">typedef</span> tvec1&lt;int, packed_lowp&gt;                 packed_lowp_ivec1;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;        <span class="keyword">typedef</span> tvec1&lt;uint, packed_highp&gt;               packed_highp_uvec1;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        <span class="keyword">typedef</span> tvec1&lt;uint, packed_mediump&gt;             packed_mediump_uvec1;</div>
<div class="lin