egui/crates/egui_demo_lib
Emil Ernerfeldt dc79998044
Improve text rendering in light mode (#7290)
This changes how we convert glyph coverage to alpha (and ultimately a
color), but only in light mode.

This is a bit of a hack, because it doesn't fix dark-on-light text in
_dark mode_ (if you have any), but for the common case this PR is a huge
improvement.

You can also tweak this yourself now using
`Visuals::text_alpha_from_coverage` or from the UI (bottom of the
image):


![image](https://github.com/user-attachments/assets/350210d4-c0bb-44b6-84cc-47c2e9d4b9f0)



## Before / After

![widget_gallery_light_x1](https://github.com/user-attachments/assets/21f5a2a0-6b4e-4985-b17f-cd1c7cc01b46)
![widget_gallery_light_x1](https://github.com/user-attachments/assets/5dfec04a-c81c-43ef-8d86-fc48ef7958f1)


## Black text Before/after
If you think the text above looks too weak, it's only because of the
default text color. Here's how it looks like with perfectly `#000000`
black text:


![image](https://github.com/user-attachments/assets/56a4a4f3-c431-4991-b941-a566a4ae94ed)
![Screenshot 2025-07-02 at 13 59
30](https://github.com/user-attachments/assets/df5a91ad-0bb8-4a0f-81a2-50852e7556c1)
2025-07-02 14:58:37 +02:00
..
benches Use Rust edition 2024 (#7280) 2025-06-30 14:01:57 +02:00
data Fix incorrect color fringe colors on SVG:s (#7069) 2025-05-21 17:18:36 +02:00
src Add light-mode Widget Gallery screenshot test (#7288) 2025-07-02 12:00:36 +02:00
tests/snapshots Improve text rendering in light mode (#7290) 2025-07-02 14:58:37 +02:00
Cargo.toml Include test windows in `egui_demo_lib` snapshot tests (#7070) 2025-05-21 17:44:27 +02:00
README.md Add button benchmark (#6854) 2025-04-28 11:58:05 +02:00

README.md

egui demo library

Latest version Documentation unsafe forbidden MIT Apache

This crate contains example code for egui.

The demo library is a separate crate for three reasons:

This crate also contains benchmarks for egui. Run them with

# Run all benchmarks
cargo bench -p egui_demo_lib 

# Run a single benchmark
cargo bench -p egui_demo_lib "benchmark name"

# Profile benchmarks with cargo-flamegraph (--root flag is necessary for MacOS)
CARGO_PROFILE_BENCH_DEBUG=true cargo flamegraph --bench benchmark --root -p egui_demo_lib  -- --bench "benchmark name"

# Profile with cargo-instruments
CARGO_PROFILE_BENCH_DEBUG=true cargo instruments --profile bench --bench benchmark -p egui_demo_lib -t time -- --bench "benchmark name"