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List: kde-core-devel
Subject: Re: KDE4 printing: results of IRC meeting
From: Kurt Pfeifle <k1pfeifle () gmx ! net>
Date: 2007-09-14 9:36:18
Message-ID: 46EA5612.7040405 () gmx ! net
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John Layt wrote:
> Pre/Post Filters:
> =================
> Filter scripts that can be applied to the print job before or after rendering
> but before sending to the Print System (???). KDE3 supports both, Qt unsure
> but almost certainly not pre-filters. Used for things like pamphlets and
> posters. Problem is most filters are ps based, so not cross-platform. Would
> loose some nice features, but could work with trolls to regain.
Rendering doesn't play any role here. But it is fully correct: the pre-
filters are filters (not necessarily scripts), which are run by KDEPrint
to process the file *it* (KDEPrint) received and whose result will go
to the real print subsystem (or the print preview).
Post-filters we don't have.
The pre-filtering system is *not* tied to PostScript. It can be used for
*any* file format that you have filter programs for (either as input for,
or as output from the pre-filters). Currently we ship pre-filters that
take text and output PS (enscript); take PDF, output PS; take PS, output
PDF; take image, output PS. -- And pre-filters may be chained/stacked,
where one's output becomes input for the next one.
Also, the current KDEPrint(3) is not at all limited to the set of pre-
filters which are shipped. A user can add any other pre-filter he wants.
--
Kurt Pfeifle
System & Network Printing Consultant ---- Linux/Unix/Windows/Samba/CUPS
Infotec Deutschland GmbH ..................... Hedelfinger Strasse 58
A RICOH Company ........................... D-70327 Stuttgart/Germany
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