egui_system_fonts

System font loader helpers for egui.

• Auto-detects the system locale and picks a reasonable font fallback chain
• Can either replace egui fonts (set) or append fallback fonts only (extend)
• Supports region presets (Korean/Japanese/Chinese/Cyrillic/Latin)

Installation

[dependencies]

egui_system_fonts = "0.1"

Usage

Replace all egui fonts (auto-detect locale)

use egui_system_fonts::{set_auto, FontStyle};

fn setup_fonts(ctx: &egui::Context) {
    set_auto(ctx, FontStyle::Sans);
}

Fallback only (keep existing priorities)

use egui_system_fonts::{extend_auto, FontStyle};

fn setup_fonts(ctx: &egui::Context) {
    let mut defs = egui::FontDefinitions::default();
    extend_auto(ctx, &mut defs, FontStyle::Sans);
}

Force a region

use egui_system_fonts::{set_with_region, FontRegion, FontStyle};

fn setup_fonts(ctx: &egui::Context) {
    set_with_region(ctx, FontRegion::Korean, FontStyle::Sans);
}

Use custom presets

use egui_system_fonts::{set_with_presets, FontPreset, FontStyle};

fn setup_fonts(ctx: &egui::Context) {
    let presets = [FontPreset::Korean, FontPreset::Latin];
    set_with_presets(ctx, presets, FontStyle::Sans);
}

Notes

• If no matching system fonts are found, the functions return an empty list.
• extend_* only applies updated definitions when at least one font was added.
• set_* overwrites the default egui fonts.

License

MIT OR Apache-2.0