 of a
        capital &lsquo;M&rsquo; in Latin typefaces.  However, later
        improvements in typography led to designs that greatly deviate from
        this rule.  Today, it is not possible to connect the EM size to a
        specific font &lsquo;feature&rsquo; in a reliable way.</p>


        <hr><a name="other-bbox"></a>

        <h3>
          How can I compute the bounding box of a text string without
          loading its glyphs before?
        </h3>

        <p>This is not possible in general.  