const <a href="dart-ui/BlendMode-class.html">BlendMode</a></span>
                  </dt>
        <dd>
          <p>Show the destination image, but only where the two images overlap. The
source image is not rendered, it is treated merely as a mask. The color
channels of the source are ignored, only the opacity has an effect.</p>
<p>To show the source image instead, consider <a href="dart-ui/BlendMode-class.html">srcIn</a>.</p>
<p>To reverse the semantic of the mask (only showing the source where the
destina