Re: Discussion: Porting noto font family to our openSUSE

On Fri, 05 Aug 2016 16:33:11 +0200,
Marguerite Su wrote:
> 
> On Thu, Aug 4, 2016 at 2:43 PM, Takashi Iwai <[email protected]> wrote:
> > Well, it's a problem of Unicode in general.  The issue may happen no
> > matter whether ttc or not.  Japanese is chosen just because of the
> > alphabet order in this case.
> 
> Yes...it's not ttc or ttf, but "one" ttc or "many" ttcs.
> 
> If we use separated ttcs, you can install Chinese variant and see Chinese right
> if you see Chinese not displayed under any locale.
> 
> But if we use one ttc, you will not see Chinese right even if you have
> installed Chinese variant
> in English (which is not covered by the tweak and should not be covered)

And if you install both Chinese and Japanese fonts?  The problem
returns again.  See, it's no solution at all.

> Because the locale-based tweak and the unicode problem.
> 
> So I think this might be a shortcoming for this topic.
> 
> Because users will not get the behavior they want in some cases.

IMO, the problem is that the implicitly preferred locale hasn't been
told to the system.  If you run a system in English locale but still
prefer the Chinese letters over other CJK, how can the system know of
it?   We need to inform it somehow.  The package selection works
partially, but it gets broken again if multiple language fonts are
installed.

Maybe we can another item, e.g. $CJK_PREFERRED_LOCALE in
/etc/sysconfig/fonts-config?  If this is set, it can be referred by a
fontconfig snippet in addition to the current locale check.

Adding Petr to Cc about this idea.


> > If the web page specifies properly the language attribute, the
> > rendering should be fine.  But most of web pages don't do the right
> > thing :)
> 
> Most of the web pages will only specify "sans-serif" and let the system decide.
> The language attribute is not possible at all, because any web page may have
> something English...

Well, you can set the language attribute to specific blocks in HTML,
too.  The language isn't necessarily unique in the whole page.

> A good part of fontconfig is that you can use a
> font to display
> English and fallback to the other when CJK characters come out. This technology
> is commonly used in Windows/Mac/Linux...

Yes, and this should work only if set up properly.  As said, the
missing piece is the information which locale is implicitly
preferred.


thanks,

Takashi
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