Font rendering with gray Rgba color is ugly

[flosse]

This is how it looks:

And this is how it is created:

let label_color = Rgba::from_gray(if path.is_some() { 1.0 } else { 0.5 });
ui.label("directory:");
ui.colored_label(label_color, path.unwrap_or(&"- none selected -".to_string()));

It is rendered on a Linux system and the master branch (10f30a0).

[emilk]

Simpler reproduce:

ui.colored_label(egui::Rgba::from_gray(1.0), "white");
ui.colored_label(egui::Rgba::from_gray(0.5), "gray");

Probably related to #1412

[flosse]

To make it even simpler to reproduce, here is a repo:

https://github.com/flosse/egui-font-rendering-bug

[flosse]

Probably related to #1412

yes it is!
You can reproduce this by using a commit before 8272b08 as shown in the before-8272b08 branch.

[emilk]

I added a test suite to the color test panel: 68d5806

White-on-white also looks bad: