WL_OUTPUT_SUBPIXEL_NONE should disable subpixel

[imyxh]

See sway/#5228: Mako currently treats the WL_OUTPUT_SUBPIXEL_NONE setting with the default subpixel orientation. As such, there is no way to disable subpixel on Mako (i.e. set it to grayscale).

Link to relevant code (thanks to progandy).

I personally strongly dislike the colored fringes created by all types of subpixel rendering and would really appreciate a way to switch it to grayscale/gradient antialiasing. Note that I have also set grayscale in fontconfig, which Mako doesn't respect:

$ file /etc/fonts/conf.d/10-no-sub-pixel.conf
/etc/fonts/conf.d/10-no-sub-pixel.conf: symbolic link to ../conf.avail/10-no-sub-pixel.conf

[vilhalmer]

I opened #261 to probably fix this, but because I'm not super familiar with the configuration around this I haven't tested it thoroughly yet. I tried disabling subpixel on one of my outputs but couldn't see a difference so I'm not sure it actually worked. @imyxh would you mind pulling the patch from that pull request to see if it has the correct behavior, or if there are more areas we need to touch?

I'll also try to test some stuff before I remove the draft marker but I'm currently consumed by something else.

[vilhalmer]

Ah, turns out it's just that none of my other apps obey the setting. Mako definitely picked it up: