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Date: Tue, 22 Sep 2015 16:56:43 -0400
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From: DJ Delorie <dj AT delorie DOT com>
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In-reply-to: <alpine.DEB.2.11.1509221815040.4099@newt> (message from Roland
	Lutz on Tue, 22 Sep 2015 18:22:14 +0200 (CEST))
Subject: Re: [geda-user] Apollon the technical thread
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Perhaps a compromise - store the font name and extents for each
string, and if you have to substitute, you can at least clip the new
rendering to the old extents so they won't intersect anything else that
they didn't intersect before.  Plus, we could make a font substitution
a hard error in an exporter, unless you give some command line option
to OK it.

We'd have to come up with good rules for when to update the saved
extents to match the "current" ones, though.  Perhaps a warning popup
if the text is moved or changed and the old extents didn't match?

There's no reason we can't use polygons in exporters to render fonts
any different than what we see on screen, and we'd need a REALLY good
reason to do that ahead of time and save the results anywhere.