After import a PNG image into stage, it would be a rectangle
bitmap or movieclip which may contains some transparent area, then
we can break apart it, and use magic wand to select transparent
area and delete.
The question is, how to do this by program (ie. jsfl, it
seems not support magic wand)? because I have huge amount png file
or, is there any way to convert png to swf without
transparent area? ( ImageReady can convert, but only delete outside
tranparency, not all ). Thanks!