class="constant">GL_INVALID_VALUE</code> is generated if a negative row length,
            pixel skip,
            or row skip value is specified,
            or if alignment is specified as other than 1, 2, 4, or 8.
        </p><p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if <code class="function">glPixelStore</code>
            is executed between the execution of <a class="citerefentry" href="glBegin"><span class="citerefentry"><span class="refentrytitle">glBegin</span