r.
                    Level 0 is the base image level.
                    Level <span class="emphasis"><em>n</em></span> is the <span class="emphasis"><em>n</em></span>th mipmap reduction image.
                </p></dd><dt><span class="term"><em class="parameter"><code>xoffset</code></em></span></dt><dd><p>
                    Specifies a texel offset in the x direction within the texture array.
                </p></dd><dt><span class="term"><em class="parameter"><code>width</code></em></span></dt><dd><