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Re: Variable pitch text filling

From: Lars Ingebrigtsen
Subject: Re: Variable pitch text filling
Date: Fri, 03 Dec 2021 16:41:35 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux)

Eli Zaretskii <eliz@gnu.org> writes:

> This is one of the "TIL" situations each one of us has with Emacs from
> time to time.  It means my thinking about adding character spacing was
> based on wrong assumptions, and the only way to do that is to add
> stretch glyphs (which can be done only between words).

Why can stretch glyphs only be added between words?  Is it because we
ask the font backend to draw a series of glyphs in one go?

If that's the case, perhaps we could stop doing that if we're doing a
gridded display?

One other thing that occurred to me (but I didn't look at closely) is
whether it would be feasible to work on the glyph matrix for a line
after it's been composed.  I remember you doing some work on that when
we talked about "compressing the mode line" -- I think you basically
went over the matrix and removed some of the space glyphs?  (That
approach didn't work for other reasons, but the basic post processing
thing did work, I think?)

Do we have enough info about the glyphs at that stage that we could add
some stretch glyphs to gridify the line?

(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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