Path: utzoo!attcan!uunet!wyse!vsi1!ubvax!ames!umd5!cvl!avjewe
From: avjewe@cvl.umd.edu (Andrew Donaldson Jewell)
Newsgroups: comp.sys.mac.programmer
Subject: bitmap -> region
Message-ID: <2960@cvl.umd.edu>
Date: 30 Jun 88 19:43:35 GMT
Organization: Center for Automation Research, Univ. of Md.
Lines: 19

I feel silly responding to my own message, but I just stumbled 
over Tech Note #193 :

There is a routine which you can license from Apple NOW
and will be in QuickDraw SOON.

FUNCTION BitMapRgn(region : RgnHandle; bMap : BitMap) : OSErr;

		or

pascal OSErr BitMapRgn(RgnHandle region, BitMap bMap);

Does exactly what I wanted, i.e. all the 1's are inside the region
and all the 0's are not.

		Andy Jewell
			avjewe@cvl.umd.edu

PS It might be the case that licensible version will only work with MPW.