[Openicc] [Gimp-print-devel] [Printing-architecture] Colour

[Michael Sweet]

On Nov 14, 2009, at 2:10 AM, Chris Murphy wrote:
> ...
> Well if Apple didn't operate like the KGB, as though everything is such a huge fricking secret, and clearly and thoroughly documented how things are supposed to work, it would at least make it easier to identify what is incorrect behavior, and whose bugs these are. 

I'll be the first to admit that our printing documentation isn't up-to-date; we're working on it. That said, we try to make as much sample code available as possible that demonstrates the "right way" to do things on Mac OS X.

That said, *every* Mac developer and printer vendor has access to Apple's engineering expertise via the Apple Developer Connection, so if the existing documentation or sample code isn't enough, please let us know!

> 
>> 
>>> So, presently we're unable to reliably print profile targets from Photoshop, using No Color Management (in Photoshop) and Off (No Color Adjustement) in a wide assortment of newer Epson drivers. What happens is, I get a completely borked profile target in printed form. Inspection of the PDF spool file indicates source≠destination, and thus ColorSync is going to come riding in to convert the job.
>> 
>> We are working with both Adobe and Epson on this issue...
> 
> Michael, yes, I have no doubt about that. The problem is that these sorts of color problems with printing are recurring themes. Epson is not the only one who has had problems, although they very well may be the worst offender. But we don't have these kinds of problems on Windows. That should be a WTF moment for Apple. Sane people have started to wonder, rationally, if there is something fwrong with the architecture when there are so many recurring problems of this sort, through multiple major revisions of the operating system. We've experienced color related problems with Tioga drivers too.

Windows doesn't provide the same level of support for color as Mac OS X, and to say that Windows doesn't have these problems is a lie - they are just hidden from most users since there isn't a "use this profile" option staring you in the face every time you print.

In any case, venting here won't fix things in Mac OS X.  Please file bugs with Apple so that any issues get escalated and dealt with:

    http://bugreport.apple.com


___________________________________________________
Michael Sweet, Senior Printing System Engineer



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