s represented by an image with vertical lines (the same lines but
rotated) and a bird clip-art image. The <a href="dart-ui/BlendMode-class.html">src</a> mode shows only the source
image, and the <a href="dart-ui/BlendMode-class.html">dst</a> mode shows only the destination image. In the
documentation below, the transparency is illustrated by a checkerboard
pattern. The <a href="dart-ui/BlendMode-class.html">clear</a> mode drops both the source and destination, resulting
in an output that is entirely transpa