bug#59243: 28.2.50; Larger Fringe Bitmaps

[Eli Zaretskii <eliz@gnu.org>]

> Cc: Dmitry Gutov <dgutov@yandex.ru>
> Date: Sun, 13 Nov 2022 11:08:19 +0100
> From: Daniel Mendler <mail@daniel-mendler.de>
> 
> on Emacs 28, when using large screens, I find the fringe bitmaps
> barely recognizable. I've seen there has been a previous discussion
> about using characters for the fringe, such that we get scaling, but
> this seems to be a longer term effort.
> 
> For now if we want to stick to bitmaps of width 8, we could still do
> a bit better by using thicker lines, by using the space more
> completely and by increasing the height of the bitmaps slightly.
> 
> Please consider the fringe bitmaps I've defined in bigger-fringe.el.
> This is a cheap change which nevertheless should increase
> accessibility a little bit. I override the bitmaps defined in
> fringe.c, flymake.el, diff.el and diff-hl.el. The file
> bigger-fringe.el contains the command `fringe-bitmap-test', which
> I've used to create a screenshot of the updated fringe bitmaps. I've
> attached the screenshot for comparison.

Thanks, but is the intent of bigger-fringe.el to have the user load it
manually?  If so, this is sub-optimal: Emacs should switch to larger
fringe bitmaps automatically based on the screen DPI, or perhaps scale
them.