Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!bbn!apple!darin
From: darin@Apple.COM (Darin Adler)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Bitmap to region conversion
Message-ID: <1498@internal.Apple.COM>
Date: 22 Apr 89 00:29:22 GMT
References: <8904181853.AA00466@vs08csc.UMD.EDU> <21369@santra.UUCP>
Organization: Apple
Lines: 20

In article <21369@santra.UUCP> jmunkki@kampi.hut.fi (Juri Munkki) writes:
> In article <8904181853.AA00466@vs08csc.UMD.EDU> russotto@wam.UMD.EDU writes:
> >I've heard that there is a routine available for converting
> >bitmaps to regions (for use in DragGrayRgn for example)
> 
> This seems to be one of the most commonly asked questions in
> comp.sys.mac.programmer.  The standard answer is that code that does
> this is available from the Apple software licensing department (or
> something like that). I wonder if anyone of those who asked ever
> contacted Apple.

There *is* a call, BitMapRgn, available in glue form from the Apple software
licensing department. It will also be in a future system software release.
It is very fast, based on an algorithm by Andy Hertzfeld that he used to
generate regions to drag from icon masks in Servant. (Incidentally, this is
the only code in current Apple system software that came from Servant.)
-- 
Darin Adler, System Software Scapegoat, Apple Computer
	Internet: darin@Apple.com
	UUCP: {nsc,sun}!apple!darin