One option would be to make a Bitmap object image the same size as the stage and directly alter the BitmapData inside of the Bitmap object. If you are referring to altering what is already on the stage you could copy it using the bitmap data draw method. This is quite an in efficient method though.
If you are compiling to Flash 10, may I recommend using Pixel bender for complex per-pixel operations. It works with both as3 and Haxe and is much more efficient.
Rebel-run for iPhone, made with Flash
Last edited by Televirtual; 02-11-2011 at 08:24 AM.