bug#44020: 28.0.50; Prefer selection of colour emoji fonts?

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> It does -- for some value of "check".  Opening a font and trying to
> find a glyph for a character is expensive, so Emacs tries to avoid
> that as much as possible.  Instead, it uses less expensive "checks"
> that don't require actually opening the font.  The details are
> somewhat complicated (and I'm not sure I have a sufficiently clear
> picture of them, nor that we have someone on board who does), and the
> are to some extent font-backend dependent, but they have to do with
> the character's script, the script's characters in
> script-representative-chars, and system APIs for finding fonts that
> support those.  And the first problem with Emoji characters in this
> context is that their script is 'symbol', which doesn't allow us to
> assign an Emoji font to them as a script.

Ah, I see.  Thank you for the explanation.

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   bloggy blog: http://lars.ingebrigtsen.no