bug#54565: 29.0.50; [PATCH] Use gsettings font rendering entries for pgtk builds

[Pieter van Prooijen]

Hello, 

When using the pgtk build of emacs under Wayland/Ubuntu, I noticed that

the font hinting was different from the regular X (Ubuntu supplied)

version of emacs.

I have the gsettings config for font hinting set to "full" on my

system, using the fonts tab in the gnome-tweaks tool.

It looks like Cairo defaults to the "slight" hinting setting when using

the Wayland backend for display and will only use the gsettings config

when rendering to an X backend, when it reads the current font settings

from xrdb.

I've attached a patch (against

380f0443b288c68df3762ee20d78719f08dd92ff) which applies the font

entries from gsettings (if present) when creating a font in Cairo.

Note that this patch won't dynamically re-render when emacs is already

running (like it does when changing the system font).

I made an attempt to hook into the gsettings change callback, but could

not force a re-creation of the font with the changed parameters,for

instance using a 'font-render' config changed event. Any pointers on

how to achieve this?

 

Do you think if this patch is a good approach to get the pgtk build to

use the system preferences for font hinting and anti-aliasing?

Kind Regards,

Pieter van Prooijen

    

0001-Use-gsettings-font-rendering-entries-for-pgtk-builds.patch
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