[Fontconfig] Support emoji fonts

[Akira TAGOH]

The problem on that idea is how to figure out what the minimal coverage in
emoji block. at this point, the minimal glyph coverage for langs are
defined in fc-lang/*.orth and cache files contains lang property only which
fonts satisfies the coverage for. if there are any specs defining a must or
an optional to have, that may be helpful otherwise we may need to think
about another idea for that.

maybe good to have a property in a cache to indicate if a font has an emoji
or not, and we could leave the way to use it to applications perhaps.

On Wed, Sep 7, 2016 at 4:28 PM, Guo Yunhe <guoyunhebrave at gmail.com> wrote:

> Hi, I recently studied some emoji fonts. These emoji fonts have fontconfig
> difficulties when packaging. They try to set the font as default emoji font
> but do not affect others. Usually the font has a separated configure file.
>
> <match>
>   <test name="family">
>     <string>sans-serif</string>
>   </test>
>   <edit binding="strong" name="family">
>     <string>Nimbus Sans L</string>
>     <string>EmojiOne Color</string>
>   </edit>
> </match>
>
> However, this will affect sans-serif font settings of other font packages
> or users' setting, because the package do not know which sans-serif font
> users want to use.
>
> I suggest maybe we can map the Unicode emoji block as test condition. Just
> like when we set a Japanese font, it won't affect English and Arabic fonts.
>
> <match>
>   <test name="family">
>     <string>sans-serif</string>
>   </test>
>   <test name="lang">
>     <string>emoji</string>
>   </test>
>   <edit binding="strong" name="family">
>     <string>EmojiOne Color</string>
>   </edit>
> </match>
>
>
>
> --
> Guo Yunhe
> _______________________________________________
> Fontconfig mailing list
> Fontconfig at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/fontconfig
>



-- 
Akira TAGOH
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/fontconfig/attachments/20160907/a0a0ad48/attachment.html>