the maximum number of characters
		    OpenGL is allowed to write in the character buffer
		    indicated by <em class="parameter"><code>name</code></em>.</p></dd><dt><span class="term"><em class="parameter"><code>length</code></em></span></dt><dd><p>Returns the number of characters actually
		    written by OpenGL in the string indicated by
		    <em class="parameter"><code>name</code></em> (excluding the null
		    terminator) if a value other than
		    <code class="constant">NULL</code> is passed.</p></