Re: Undocumented colorsync changes in Jaguar?
Re: Undocumented colorsync changes in Jaguar?
- Subject: Re: Undocumented colorsync changes in Jaguar?
- From: Chris Murphy <email@hidden>
- Date: Sat, 4 Jan 2003 10:58:40 -0800
On Friday, January 3, 2003, at 10:00 PM, John Fieber
<email@hidden> writes:
Is anyone aware of any quiet changes to colorsync that have slipped in,
say, the 10.2.3 update of OSX?
Is anyone aware of the quiet changes to the entire operating system
that slip in with each update? :) These aren't minor updates, but the
documentation that accompanies them is extremely minor. Getting even
reasonable documentation on the changes has been an on-going
frustration for developers, and apparently quite a resource challenge
for Apple.
In poking around with the Colorsync utility, I noticed that it listed
"factory" profiles as being in effect for both monitors while the
Displays system preference (and my eyes) told otherwise.
I've had this happen to me quite a few times even prior to 10.2.3 and I
haven't figured out the pattern. One day the system has just reverted
back to the system built profile instead of my custom one,
inexplicably. The other bug is where there is a difference between the
Display panel and the ColorSync Utility listing. That's happened to me
less frequently, so I have even less of an idea as to a pattern.
But things like this sometimes involve caches. So I've since dumped the
user cache contents and system cache contents and haven't had a problem
since:
/Library/Caches
~/Library/Caches
It makes me wonder if somehow the print
driver is also confused on what profiles it should be applying.
It shouldn't be. The settings right now are to either use ColorSync or
not. If you use it, then there is a source profile sent by the
application, the printer driver or assumed by ColorSync (Generic RGB);
and the destination is the one in the ColorSync Utility for that media
type. The rendering intent is the default intent specified in the
printer's profile. If you turn it off, then the driver's proprietary
color management is used instead. I've found this to be quite
consistent between OS 9 and OS X for Epson printers. I haven't
extensively tested this with other printer makes.
Also, I recently added an Epson flatbed scanner (1660) which used to
show up under Scanners in the ColorSync Utility but has since
mysteriously disappeared...?
I don't have an answer for that.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
---------------------------------------------------------
Co-author "Real World Color Management"
Published by PeachPit Press (ISBN 0201773406)
Available Jan/Feb 2003 (It's finally done!!)
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