Re: Color managed printing from anything but Photoshop
Re: Color managed printing from anything but Photoshop
- Subject: Re: Color managed printing from anything but Photoshop
- From: John Fieber <email@hidden>
- Date: Tue, 16 Mar 2004 01:58:17 -0500
On Mar 15, 2004, at 8:50 PM, Bob Smith wrote:
Why is this so difficult??
...
Specifically I'm trying to print from iView Media Pro but I don't
think the problems I'm having are application specific.
For what its worth, my experience is that iView is broken with respect
to color managed printing even before MacOS X confuses things--the
color data is mucked up before it gets deposited into a queuing system
which tries very hard to manipulate the color data of everything that
passes through it.
It appears that iView is doing matching to an output profile
internally, but to what profile I do not know since there is no user
control over it. This converted data is is tagged as Generic RGB when
it hits the queue as a PDF spool file. The only way Generic RGB tagged
data in a spool file works in a sensible way with the MacOS X colorsync
"managed" queuing system is if (a) the data really IS Generic RGB or
(b) the data is already converted to the target profile and the "no
color management" option in the driver is selected if it exists. Any
variation from these options and the colorsync in the print queuing
system WILL mess things up.
It seems that iView conforms to neither a nor b. I also had the same
problem with Portraits & Prints, an otherwise very slick program for
printing.
Based on Apple's own applications, it appears as though the way things
are SUPPOSED to work is for applications to tag color data with an
actual valid profile for the data when printing, and the queuing system
will then automatically match the profile for the output device.
Trouble is that there is no simple or even comprehensible way for users
to control the output profile or rendering intent, and the only
mechanism for applications to take control of their own color
management is really quite an ugly kludge under the hood, and flat out
fails in a variety of situations. There are all sorts of other
problems, but I think they essentially consequences of these two
half-baked aspects of the MacOS X total-color-management-architecture.
-john
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