)</span></tt>

</dd>
<a id="pixel,float,float,float,float"></a>
<dt><pre><span class="Keyword">proc</span> <a href="#pixel%2Cfloat%2Cfloat%2Cfloat%2Cfloat"><span class="Identifier">pixel</span></a><span class="Other">(</span><span class="Identifier">r</span><span class="Other">,</span> <span class="Identifier">g</span><span class="Other">,</span> <span class="Identifier">b</span><span class="Other">,</span> <span class="Identifier">a</span><span class="Other">:</span> <span class="Identifier">float</span><s