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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Interest in nt_load_image?
Date: Mon, 30 Mar 2020 21:53:53 +0300
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> Date: Mon, 30 Mar 2020 21:47:38 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: emacs-devel@gnu.org
> 
> > >> P.S.: Just a side question, is LCMS2 actually used anywhere in Emacs?
> > >
> > > Yes, see src/lcms.c.
> > 
> > Sorry, apologies once more for the ambiguity: I meant _used_ not exposed
> > as a library. lcms.c seems only to provide functions to compute color
> > distances, but the color management does not seem to be used anywhere by
> > Emacs.
> 
> I don't see it used anywhere in Emacs.  Maybe some third-party
> packages do, though.

Actually, I take that back: those functions can be used as the 4th
argument to color-distance.