 with the original unfiltered source display object and another for the
final image after filtering. The final image is used when rendering. As
long as the display object does not change, the final image does not need
updating.</p>
<p>The openfl.filters package includes classes for filters. For example, to
create a DropShadow filter, you would write:</p><p class="javadoc">Throws:</p><table class="table table-bordered params"><tr class="indent"><th style="width:25%;"><code>ArgumentError</code></th><td><p>Whe