Re: ligature usage - WAS: How do we find out what assigned code points aren't normally used in text?

From: Werner LEMBERG <>
Date: Mon, 12 Sep 2011 08:09:50 +0200 (CEST)

>> Certain layout processes, in certain cases, in certain languages,
>> simply can't be fully automated.
> And interestingly, there is a crucial difference between ligatures
> and hyphenation in this regard: While a conservative processor could
> simply omit hyphenation in ambiguous cases (potentially leading to
> suboptimal linebreaking though), a decision ought to be made for
> ligatures if one uses a font requiring them. But then, although
> getting ligatures wrong in this case is categorically somehow
> "worse" than too-wide inter-word spacing, who knows which visual
> effect actually has more adverse effect on the reading process ...

Well, it's not that complicated. Ligatures in German must not happen
at compound break points, while they can be applied to ordinary break

Consider the word `Dorfladen' (village shop). Using `=' to indicate a
compound break point and `-' for normal ones, the proper break points
are `Dorf=la-den' which means no `fl' ligature. Note that `Fladen'
means `cow dung', so having a ligature there is really bad.

On the other hand, consider `Löffel' (spoon). Inspite of the
hyphenation `Löf-fel', a ligature looks good.

Received on Mon Sep 12 2011 - 01:14:28 CDT

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