macOS: Font rendering inconsistencies depending on monitor DPI

[mitchellh]

Discussion #4487
Discussion #3842

See the discussions for more details, screenshots. I'm not sure what is causing it yet and I don't have a firm reproduction but there are enough people reporting this with different fonts I feel confident it exists. There is some font rendering issue when it comes to using Ghostty on different monitor DPIs.

I tagged this as macOS since I've only since reports on macOS.

cc @qwerasd205

[qwerasd205]

I have a feeling this is caused by incorrect handling of dpi scaling. I'll look in to it some time in the coming week.

[charlesnicholson]

Another discussion with screenshots + video, if it's helpful:
#4197

[jmg-duarte]

Adding to the discussion in #4487, the computer used in it is a 2022 MacBook Pro 13', in my 2021 MacBook Pro 14' the issue doesn't manifest at all when running version 8f5f432, build 8855.

This with the same monitors discussed in the thread.

[mohd-akram]

Running into this on a 27" 2560x1440 external monitor.