const <a href="dart-ui/BlendMode-class.html">BlendMode</a></span>
                  </dt>
        <dd>
          <p>Composite the destination image over the source image, but only where it
overlaps the source.</p>
<p>This corresponds to the "Destination atop Source" Porter-Duff operator.</p>
<p>This is essentially the <a href="dart-ui/BlendMode-class.html">dstOver</a> operator, but with the output's opacity
channel being set to that of the source image instead of being a
combination of both image's opacity 