From: Khaled Hosny <khaledhosny@eglug.org>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Making necessary OpenType features on by default
Date: Fri, 20 Feb 2009 22:23:52 +0200 [thread overview]
Message-ID: <20090220202352.GA15066@khaled-laptop> (raw)
In-Reply-To: <499EFD12.1080808@wxs.nl>
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On Fri, Feb 20, 2009 at 07:57:22PM +0100, Hans Hagen wrote:
> Khaled Hosny wrote:
>
>> Currently, when defining a font feature one has to enable all features
>> by hand which is IMHO not very user friendly as it implies prior
>> knowledge about OpenType font features and the meaning of each one, not
>> every Arabic user, for example, knows what does 'init', 'medi, etc.
>> ligatures mean yet to know that he must enable them to get proper font
>> rendering.
>>
>> I think some font features should be on by default, so that
>> \definefontfeature[script=arabic] should be enough to get an Arabic font
>> rendered correctly with the default features as its designer intended
>> (designers assume that certain will be on while other are off by
>> default, like liga vs. dlig), and if some one wants to disable a certain
>> default feature he can turn it off, not the reverse.
>>
>> Microsoft's OpenType features list page
>> (http://www.microsoft.com/typography/otspec/features_ae.htm) gives a "UI
>> suggestion" for each feature noting if it should be on by default, I
>> think those are what most OpenType enable by default (at least the ones
>> I tested).
>
> i've been thinking of a features=default option (as there is already
> features=yes|no)
>
> even then it can never be fully automatic as some usage of fonts (think
> of verbatim) demands devation from defaults
>
> now, if we implement a default list then we first need to make a
> detailed list of what the supposed defaults are (and i'm not sure if ms
> is the only resource for that; after all, not all machineries support
> all features)
I didn't find any other sources, and this seem to be the only published
source of such information.
> a related issue is that fonts can be used for different languages and
> scripts and therefore a more dynamic feature switching might be needed
> i.e. arabic might need init, but when the same font is used for latin it
> not handy to have it enabled, so there might be a matrix of features /
> scripts needed
I think we can make default features per script (HarfBuzz seems to do
that).
> if it was trivial i'd already done it -)
I know :) just my two cents.
> (implementing is trivial but i don't want to make the wrong decision
> here as it will influence compatibility)
I see.
--
Khaled Hosny
Arabic localizer and member of Arabeyes.org team
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next prev parent reply other threads:[~2009-02-20 20:23 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-20 18:39 Khaled Hosny
2009-02-20 18:57 ` Hans Hagen
2009-02-20 19:31 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-20 21:02 ` Khaled Hosny
2009-02-20 21:23 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-20 22:10 ` Hans Hagen
2009-02-20 22:26 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-21 23:53 ` Karl Berry
2009-02-20 20:23 ` Khaled Hosny [this message]
2009-02-20 22:07 ` Hans Hagen
2009-02-20 22:49 ` Khaled Hosny
2009-02-21 15:58 ` Ilda Khaki
2009-02-23 10:58 ` Hans Hagen
2009-02-21 13:05 ` Otared Kavian
2009-02-22 21:03 ` Khaled Hosny
2009-02-22 22:44 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-23 12:02 ` Khaled Hosny
2009-02-23 13:00 ` Hans Hagen
2009-02-23 15:34 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-23 17:15 ` Khaled Hosny
2009-02-23 17:56 ` Idris Samawi Hamid
2009-02-23 22:51 ` Khaled Hosny
2009-02-23 23:19 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-24 20:41 ` Khaled Hosny
2009-02-25 2:30 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-23 10:53 ` Hans Hagen
2009-02-23 12:09 ` Khaled Hosny
2009-02-23 12:17 ` Thomas A. Schmitz
2009-02-23 12:28 ` Hans Hagen
2009-02-23 16:56 ` Khaled Hosny
2009-02-23 17:01 ` Taco Hoekwater
2009-02-23 17:04 ` Taco Hoekwater
2009-02-23 17:49 ` Khaled Hosny
2009-02-23 23:23 ` Hans Hagen
2009-02-24 15:49 ` Idris Samawi Hamid
2009-02-24 16:03 ` Hans Hagen
2009-02-23 12:36 ` Khaled Hosny
2009-02-22 22:54 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-22 23:35 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-21 21:14 ` Otared Kavian
2009-02-23 10:42 ` Hans Hagen
2009-02-23 12:25 ` Khaled Hosny
2009-02-23 12:46 ` Khaled Hosny
2009-02-23 12:56 ` Hans Hagen
2009-02-20 18:58 ` Hans Hagen
2009-02-20 20:27 ` Khaled Hosny
2009-02-20 22:09 ` Hans Hagen
2009-02-20 22:46 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-21 11:41 ` Hans Hagen
2009-02-22 20:54 ` Khaled Hosny
2009-02-22 23:08 ` Idris Samawi Hamid ادريس سماوي حامد
2009-02-22 13:51 ` Khaled Hosny
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