X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
Date:	Wed, 25 Mar 2015 14:15:00 -0400
Message-Id:	<201503251815.t2PIF0i0015341@envy.delorie.com>
From:	DJ Delorie <dj AT delorie DOT com>
To:	geda-user AT delorie DOT com
In-reply-to:
	<CAGYR9vcjq9DRWkZ2xJDUmUhUeUyvy4OfTsiYeeYtaLMiEqiHbw AT mail DOT gmail DOT com>
	(message from Bernhard Kraft on Wed, 25 Mar 2015 16:23:54 +0100)
Subject:	Re: [geda-user] Export filters
References:	<CAGYR9vcjq9DRWkZ2xJDUmUhUeUyvy4OfTsiYeeYtaLMiEqiHbw AT mail DOT gmail DOT com>
Reply-To:	geda-user AT delorie DOT com

> How are the export filters of PCB currently implemented?

PCB has a shared library hook for runtime-loadable actions and
exporters, although the common ones are built into pcb.  If you look
at one of my plugins you'll see how to add an action at runtime:

http://www.delorie.com/pcb/teardrops/
more at http://www.delorie.com/pcb/

For exporters, PCB looks for a function called "hid_<filename>_init()"
(i.e. frob.so -> hid_frob_init()) or, more easily, a function called
pcb_plugin_init().  This function may call any of the same functions that
built-in hids call, including hid_register_hid().

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