    </p>
      </div>
      <div class="refsect1" id="notes">
        <h2>Notes</h2>
        <p>
            If a buffer is not present,
            then a <code class="function">glClear</code> directed at that buffer has no effect.
        </p>
      </div>
      <div class="refsect1" id="errors">
        <h2>Errors</h2>
        <p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if any bit other than the three defined
            bits is set in <em class="parameter"><code>mask</cod