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AuroraUI

AuroraUI is a cross-platform desktop UI framework for Rust that treats performance as a first-class constraint. Every subsystem — text rendering, widgets, animation, accessibility — is behind a feature gate. You pay only for what you use, in both binary size and startup time.

Feature-Gated Philosophy

An app that only draws rectangles should not ship a font shaper. Text rendering alone adds ~1.5 MB (font shaping via rustybuzz), so it's behind the text feature flag.

GPU Backends

Feature	Backend	Binary impact	Best for
software	softbuffer (GDI/CPU)	~0 KB	Smallest binary, no GPU
opengl	glow (OpenGL 3.3)	~200 KB	Fast startup, broad compat
wgpu_backend	wgpu (Vulkan/Metal/DX12)	~2 MB	Best rendering, future-proof

Content Features

Feature	What it adds
text	Font loading, shaping, text widgets, buttons
image	PNG/JPEG decoding and Image widget
svg	SVG parsing, rasterization, and Svg widget
animate	Tweens, easing, keyframes, timelines, and presets

Quick Start

use aurora_ui::prelude::*;

fn main() {
    App::new()
        .title("Hello, Aurora")
        .size((400, 300))
        .font(include_bytes!("Roboto-Regular.ttf"))
        .run(|window, _frame| {
            window.root(
                col!()
                    .spacing(10.0)
                    .align(Align::Center)
                    .justify(Justify::Center)
                    .child(Text::new("Hello, world!").font_size(24.0)),
            );
        })
        .expect("Failed to run app");
}

Documentation

Platform

• App — Application builder, windowing, and event loop

Core

• Color — Color utilities and color schemes
• Rect, Point, Size — Geometry primitives
• Edges — Edge insets (padding, margins, borders)
• Corners — Corner radii for rounded rectangles

GPU

• GpuContext — GPU surface abstraction and backends

Render

• Canvas — 2D drawing API

Text

• FontManager — Font loading and management
• TextLayout — Text shaping, measurement, and rendering
• Text — Text widget

Widgets

• Layout — Column, Row, Stack, Positioned
• ScrollView — Scrollable viewport with scrollbar
• Button — Styled button with any child content
• Image — Raster image display (PNG, JPEG)
• Composite — Stateful composite widgets and #[composite_widget] macro
• Drag & Drop — Draggable widgets and drop zones

Animation

• Animation — Tweens, easing, keyframes, timelines, and presets

Integrations

• Iconify — Compile-time icon embedding from iconify.design
• Fonts — Compile-time Google Fonts embedding