Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!holmes
From: holmes@Apple.COM (Richard A. Holmes)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Invisible Text with DrawText on SE, not on II
Keywords: Portability
Message-ID: <44690@apple.Apple.COM>
Date: 11 Sep 90 16:07:36 GMT
References: <6245@hub.ucsb.edu>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 20

As I understand, if QuickDraw doesn't have enough stack space, it will choose
not to "drawstring"; this is better than crashing for lack of stack space.  I
suspect that perhaps your app is stack-intensive.  The default stack space can
be different on different machines:  Color quickdraw requires more stack than
B&W.  You could try upping the stack space for your app.  I think the calls woul
d be some combination of "SetApplLimit" and "MaxApplZone", IM II, 7-51 should
explain to some extent.  You can test this theory without changing your code
by changing the low mem global "DefltStack" using a debugger such as MacsBug
or TMON to a larger quantity.  "DefltStack" resides in a long word at location
(Hexadecimal) $322.

I hope it helps:  I had a similar problem once and this cured it.  I was able
to simply reduce my stack usage, and didn't have to increase the stack
allocation at all.

Let me know if this was the problem.
-- (I make no claims as to the truthfulness or lack of truthfulness of any words
contained in this posting....)

--Richard.