Repo brief: emilk/egui

Generated by RepoPilot · document generated 2026-09-17 · concise human review Evidence snapshot · analyzed 2026-09-17T00:16:19.646Z · commit dadf573dde7a

Verdict

Healthy — Strong maintenance signals

• Last commit today
• 34+ active contributors
• Distributed ownership (top contributor 39% of recent commits)
• Apache-2.0 licensed
• 2 more receipts on the live page

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against dependency CVEs from deps.dev and OpenSSF Scorecard

What it is

egui is an immediate-mode GUI library written in pure Rust that renders on both web (via WebAssembly) and native platforms (Linux, macOS, Windows, Android). It provides a simple, fast API for building user interfaces by directly drawing textured triangles, making it trivial to integrate into game engines or standalone applications without retained-state boilerplate. Monorepo workspace (Cargo.toml resolver v2): core crates are ecolor/ (colors), emath/ (math primitives), egui/ (immediate-mode API), epaint/ (rendering), eframe/ (native + web runner). Native backend splits into eframe/src/native/ (app_icon.rs, glow_integration.rs, wgpu_integration.rs, winit_integration.rs) and eframe/src/web/…

Start here

• crates/egui/src/: Core immediate-mode API and widget implementations; primary library surface
• crates/eframe/src/epi.rs: App trait definition and lifecycle contract for both native and web runners
• crates/eframe/src/native/: Native platform integration: winit event loop, wgpu/glow renderers, file storage, macOS specifics
• crates/eframe/src/web/app_runner.rs: Web/WASM bootstrap and app lifecycle orchestration
• crates/epaint/src/: Low-level rendering pipeline: mesh, texture, shader abstractions

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

git clone https://github.com/emilk/egui.git
cd egui
cargo build
cargo run --example=demo_app

Verify Cargo.toml for current MSRV (1.95) and available examples in examples/ folder before running.

Daily commands:

For native: cargo run --example=demo_app (or specific example from examples/). For web (inferred from eframe/src/web/ structure): wasm build requires wasm32-unknown-unknown target and a bundler (not specified in Cargo…

…shortened for this brief.

Key cautions & unknowns

• Scorecard: default branch unprotected (0/10)
• Wasm profile tuning (opt-level = 2, not 3 or 's') is unconventional—commit message in Cargo.toml suggests it balances size and performance; deviating requires understanding the tradeoffs. Debug builds use opt-level = 2…
• Exact package version, compatibility, provenance, and deployment context still need project-specific review.

Sources

• Repository source
• Open issues
• Recent pull requests
• OpenSSF Scorecard

Evidence note

Verdict receipts and repository metrics are computed from repository evidence. Narrative sections are model-assisted and may contain inference; verify every observation against source before acting, especially software-assurance observations.

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