Re: using glyphs by default in perl-mode

[Eli Zaretskii]

> From: Ted Zlatanov <address@hidden>
> Date: Wed, 05 Jun 2013 10:45:26 -0400
> 
> (Aside: I attempted to use `compose-region' to build more complicated
> compositions besides a single character.  The docstring says the
> COMPONENTS format can be several things, including:
> 
> "If it is a vector or list, it is a sequence of alternate characters and
> composition rules, where (2N)th elements are characters and (2N+1)th
> elements are composition rules to specify how to compose (2N+2)th
> elements with previously composed N glyphs."
> 
> I stared at this for a while then I gave up.  It really needs one or two
> examples and an alternate wording, because I have no idea what it says.)

There's a reference to reference-point-alist, which I think has those
details.

As for examples, you can see them in tv-util.el, for example.

> It would be really nice to be able to [...] use an image to create a
> glyph.

I don't understand this: Emacs _can_ display an image, so what can you
possibly mean by "use an image to create a glyph"?  What is a "glyph"
in this context?