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

[Michael Sweet]

On Nov 15, 2009, at 12:12 PM, Chris Murphy wrote:
> ...
> Two things that emphasize a continuing need for application prematching capability:
> 
> a.) Black point compensation in ColorSync has functioned incorrectly since it was implemented. In an ICC v2 context, BPC is required. Perceptual rendering is inadequate. So is it working on 10.6? I don't know.

If you haven't done so already, file bugs on this and let me know the bug numbers so I can track them. A lot of the CMM changed in Snow Leopard (and we fixed a lot of bugs there), so if these are still broken in 10.6 now is the time to get it fixed.

> b.) Only the Apple CMM is supported in the print architecture. It's not possible for an application to ask for another CMM be used by CoreGraphics for printing purposes. This means application prematching is a required workflow.

I'm not sure you'll ever see Apple providing support for third-party CMMs, but CUPS does allow users (and vendors) to provide replacement filters. I know of at least one RIP vendor that does this to replace cgpdftoraster for the printers they support.

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Michael Sweet, Senior Printing System Engineer