ter</span></span></a>
                        </td></tr></tbody></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>
        If an error is generated,
        <code class="function">glIsEnabled</code> returns 0.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
        <code class="constant">GL_INVALID_ENUM</code> is generated if
        <em class="parameter"><code>cap</code></em> is not an accepted value.
 