getVisibleBounds

gistfile1.as

package arp.utils {
	import flash.display.BitmapData;
	import flash.display.DisplayObject;
	import flash.geom.Matrix;
	import flash.geom.Rectangle;
	
	public function getVisibleBounds(source:DisplayObject, padding:int = 0):Rectangle {
		var matrix:Matrix = new Matrix()
		matrix.tx = -source.getBounds(null).x + padding;
		matrix.ty = -source.getBounds(null).y + padding;
		
		var data:BitmapData = new BitmapData(source.width + padding *2, source.height + padding *2, true, 0x00000000);
		data.draw(source, matrix);
		var bounds : Rectangle = data.getColorBoundsRect(0xFFFFFFFF, 0x000000, false);
		bounds.offset(-matrix.tx, -matrix.ty);
		data.dispose();
		return bounds;
	}
}