Changes coming for CUPS 1.6

Tim Waugh twaugh at redhat.com
Thu Jan 19 10:21:07 UTC 2012


On Wed, 2012-01-18 at 18:14 +0100, Kevin Kofler wrote:
> What's the story about the PPD stuff Till is talking about there? That
> scares me the most when I read that mail. Will this be supported by a patch
> from openprinting.org? Seeing how Apple upstream is dropping features we
> need, I wonder whether the best solution wouldn't be a full-blown fork of
> CUPS, where your Avahi patches could also be merged to.

I'm not sure of the details.  Here is the background:

The Printer Working Group is engaged in an effort called IPP
Everywhere¹.  The goal is to have "driverless" printing by having a
small common set of imaging standards in printers, and for the printer
capabilities to be inspected using IPP.

There is no need for PPDs in this vision of how things will work in the
glorious future, "when" all printers support IPP Everywhere.

The way I expect it to work in CUPS 1.6 is that the concept of PPDs
disappears as far as clients to CUPS are concerned, but that it will
still use PPDs internally for existing printers that do not support IPP
Everywhere (that is to say, all of them right now).

In other words, I think the direction it is going is to make PPDs an
implementation detail of CUPS.

How that will work in practice I don't know yet.

Tim.
*/

¹ http://pwg-wiki.wikispaces.com/IPP+Everywhere
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