affineui

Safe, idiomatic Rust bindings for AffineUI — a tiny GPU-accelerated HTML/CSS UI renderer for tools and game engines.

EXPERIMENTAL preview — published for early testing; APIs and the underlying C ABI will change while AffineUI is pre-1.0.

Two modes:

• App-owned — AffineUI owns the window and main loop:

use affineui::{App, Config, Theme, View};

let view = View::new(Theme::Decius);
view.build(|v| {
    v.heading(1, "Hello", "", "");
    v.button("Click me", true, "go").on_click(|| println!("clicked"));
    v.slider("Exposure", 0.5, 0.0, 1.0, "exposure")
        .on_change(|value| println!("exposure = {value}"));
});

let app = App::new(Config::default().title("Demo"));
app.load_view(&view);
app.run();

• Embedded — your engine owns the GPU device, loop, and input; AffineUI renders into your render targets (affineui::embedded::Ui, D3D11 / Metal / GL / WebGPU handles).

Native library

This crate drives the affineui_c shared library and does not ship it. Build it from the AffineUI repo (cmake -DAFFINEUI_BUILD_C_SHARED=ON, target affineui_c) and set AFFINEUI_LIB_DIR to the output directory; in a repo checkout the build script finds it automatically and copies it next to your binaries.

Everything is single-threaded by contract (handles are !Send); callbacks are released exactly once and panics never cross the FFI.