ed in the <code class="constant">GL_UNPACK_ROW_LENGTH</code> section.
                    </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_ALIGNMENT</code></span></dt><dd><p>
                        Specifies the alignment requirements for the start of each pixel row in memory.
                        The allowable values are
                        1 (byte-alignment),
                        2 (rows aligned to even-numbered bytes),
                        4 (word-alignment), and
           