Re: Panther, sRGB, web browsers
Re: Panther, sRGB, web browsers
- Subject: Re: Panther, sRGB, web browsers
- From: John Fieber <email@hidden>
- Date: Thu, 18 Dec 2003 16:31:59 -0500
On Dec 18, 2003, at 4:06 PM, John Gnaegy wrote:
Can we look forward to a New and Improved version of the ColorSync on
MacOS X document in the future to clarify some of this? Or is the
current implementation state just as confusing as it seems such that
more documentation would just reaffirm the confusion?
What part is confusing? As it is now, standard Cocoa behavior is to
match images to the display's profile. In the case of untagged data,
the display's profile is assumed as the source, which means basically
that no match occurs.
What is confusing is that it appears to directly contradicts what
tn2035 states:
On Mac OS 10.2, untagged RGB data in PDF will be tagged with the
Generic RGB profile, and as a result it will be color-matched to the
screen.
On earlier versions of Mac OS X, untagged RGB data in PDF would be
tagged with the system profile (the profile returned by the
CMGetSystemProfile function), and as a result, no color-matching to
the screen would occur (because both the source and destination
profiles for the match would be identical).
If this is actually correct, then all the commonly used APIs must be
arranging for the data to be tagged with the display profile by the
time it hits Quartz for rendering. If this is the case, a simple note
mentioning that would go a long way towards reducing this bit of
confusion.
And would a similar thing be happening for printing? In trying to
unravel color problems with assorted applications when printing, I've
found that queued PDF data is actually often tagged with Generic RGB
(as suggested in the 10.2 updates section of tn2035). Having one
assumption for display (the display profile) and a different one for
printing doesn't seem to be consistent with the goals of ColorSync.
-john
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.
| References: | |
| | >Panther, sRGB, web browsers (From: Chris Murphy <email@hidden>) |
| | >Re: Panther, sRGB, web browsers (From: Steve Upton <email@hidden>) |
| | >Re: Panther, sRGB, web browsers (From: Chris Murphy <email@hidden>) |
| | >Re: Panther, sRGB, web browsers (From: John Gnaegy <email@hidden>) |
| | >Re: Panther, sRGB, web browsers (From: John Fieber <email@hidden>) |
| | >Re: Panther, sRGB, web browsers (From: Chris Murphy <email@hidden>) |
| | >Re: Panther, sRGB, web browsers (From: John Fieber <email@hidden>) |