Font rendering on LoDPI displays

[rev4324]

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Describe the bug / provide steps to reproduce it

Text rendered in Zed is noticeably more blurry than other editors when using a LoDPI monitor, e.g. an external 1440p monitor like mine, or a (really) old MacBook. I'm well aware that macOS generally sucks at font rendering on non-retina screens, so to make sure my eyes aren't lying to me, I made a little comparison.

I took screenshots of the same code snippet in Zed, VSCode and Xcode and pasted them into Figma, which doesn't apply a bilinear filter when zooming images, so you can zoom in and see the per-pixel difference. Here's the comparison.

To my eyes VSCode is the sharpest, then there's XCode (which is as sharp as every other AppKit/SwiftUI app), then there's Zed with a weird 1px 50% alpha border around the text that made it really blurry. It seems like some sort of AA that doesn't work particularly well on a LoDPI display.

Environment

Zed: v0.123.2 (Zed Preview)
OS: macOS 14.3.1
Memory: 8 GiB
Architecture: aarch64

If applicable, add mockups / screenshots to help explain present your vision of the feature

No response

If applicable, attach your ~/Library/Logs/Zed/Zed.log file to this issue.

If you only need the most recent lines, you can run the zed: open log command palette action to see the last 1000.

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[rubnogueira]

I second this. Using Zed with a 1080p LoDPI is very uncomfortable due to the blurriness of the font. This doesn't happen with Sublime, VSCode, or XCode.

[leftbones]

Seconding this as well. Zed looks great on my MacBook screen, but looks bad when I dock to my 1080p monitor. No other editor has that problem for some reason.