    <div class="refentry" id="gl_FragDepth">
      <div class="titlepage"></div>
      <div class="refnamediv">
        <h2>Name</h2>
        <p>gl_FragDepth — establishes a depth value for the current fragment</p>
      </div>
      <div class="refsynopsisdiv">
        <h2>Declaration</h2>
        <code class="fieldsynopsis"><span class="modifier">out highp </span><span class="type">float </span><span class="varname">gl_FragDepth </span>;</code>
      </div>
      <div class="refsect1" id="description