I have a program that, at present, uses both UIImage and CGImage components. There's one CGImage tucked away in there for use as an image mask, since it seems easier to create the mask as a CGImage and leave it that way than to tuck it into the UIImage wrapper. My question is simply: are there any tangible differences between using a UIImage object, and converting my object to use nothing but CGImages? Is there any difference in memory size or, more importantly, the speed at which the items are drawn?
-Ash