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From: ccc_ldo@waikato.ac.nz (Lawrence D'Oliveiro, Waikato University)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Missing update events in SFGetFile (system 7.0)
Message-ID: <1275.26d16761@waikato.ac.nz>
Date: 21 Aug 90 04:54:56 GMT
References: <1990Aug15.121158.813@lth.se> <1990Aug19.110544.12102@dhw68k.cts.com>
Organization: University of Waikato, Hamilton, New Zealand
Lines: 18

In all CLUT-based graphics modes, a pixel value which is all zeros is
supposed to be white, while a pixel value of all ones is supposed to
be black (cf Inside Mac page V-140). Is it worth checking that that
FillRect call is drawing pixels that are all ones?

It could be that the RGBForeColor call is mapping to a CLUT entry
other than the last one (all ones), but which is also black (or nearly so).
It would thus be legitimate for this CLUT entry to be redefined
on an ActivatePalette, causing a change in the displayed colour (though
why it would change from black to white I don't understand).

Just another idea to add to the confusion...

Lawrence D'Oliveiro                       fone: +64-71-562-889
Computer Services Dept                     fax: +64-71-384-066
University of Waikato            electric mail: ldo@waikato.ac.nz
Hamilton, New Zealand    37^ 47' 26" S, 175^ 19' 7" E, GMT+12:00
The net never sleeps. It just gets knocked unconscious every now and then.