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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Font selection depending on the face weight
Date: Mon, 22 May 2023 16:40:54 +0300
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To: Nicolas Martyanoff <nicolas@n16f.net>
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In-Reply-To: <87ilckwoay.fsf@valhala.localdomain> (message from Nicolas
 Martyanoff on Mon, 22 May 2023 14:20:05 +0200)
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> From: Nicolas Martyanoff <nicolas@n16f.net>
> Date: Mon, 22 May 2023 14:20:05 +0200
> 
> >From a quick search, Emacs uses font-weight-table to map numeric font
> weights to symbolic weights, but I cannot find any link between these
> numeric values and the weight names reported by other applications.
> 
> Is there something I can do to control (or at least understand) the way
> weights are mapped?

See the beginning of src/font.c.