Input Field Cursor Width inconsistent

[jbirnick]

Description

The cursor in the input field is sometimes thinner and sometimes wider, and least on LoDPI screens.

Environment

• GPUI: latest git 9f90c1a
• GPUI Component: latest git fceaa5c
• Platform: Arch Linux
• 1080p monitor

Steps to Reproduce

0. Make sure you're on a LoDPI screen, e.g. a 1080p Full-HD monitor.
1. Clone the gpui-component repo.
2. Run cargo run --release and navigate to the input field.
3. Enter some text text and move the cursor left and right. Look closely at the cursor. Sometimes it will be 1px wide and sometimes 2px wide.

Screenshots

Video: https://youtu.be/knRh39DDSKw

Expected

The cursor should have the same width all the time.

Actual

The cursor is sometimes 1px wide and sometimes 2px wide.

[huacnlee]

This is a known issue of GPUI on Windows.

[jbirnick]

Doesn't seem to be just Windows, because I use Linux. My friend also uses Linux and has the same issue.

We both use Arch Linux with the hyprland compositor on Wayland.

[jbirnick]

Thanks for adjusting the pixel width.

However, this issue still persists if I apply fractional scaling on Wayland, for example with a scaling factor of 1.2. In this case, one px doesn't correspond to one physical pixel on the monitor, so we run into the same problem.

However, other software, like for example Firefox, doesn't have this issue. The cursor has always the same width in terms of physical pixels. Do you know what they do different in the rendering process?

(I know this is a GPUI question rather than GPUI-component, but I thought you would know perhaps.)