denise

Core of Denise, a direct-rendering UI toolkit for embedded Linux and systems without a desktop environment — kiosks, digital signage, industrial HMIs, Raspberry Pi panels.

This crate is platform-agnostic: geometry, colour, the pixel buffer contract, input events and dirty-rectangle tracking. It contains no platform code and no unsafe, and builds no_std + alloc. Backends live in separate denise-* crates and are selected at build time, so an embedded target never compiles desktop code.

use denise::{DamageTracker, Rect, Surface};

# fn demo(surface: &mut impl Surface, tracker: &mut DamageTracker) -> Result<(), denise::SurfaceError> {
let mut frame = surface.acquire()?;
// The buffer just acquired may be several frames old; widen the damage to match.
let damage: &[Rect] = tracker.resolve(frame.age());
// ... draw, clipped to `damage` ...
drop(frame);
surface.present(damage)?;
tracker.end_frame();
# Ok(())
# }

Status: 0.0.0, M0. The Surface and InputSource traits and damage tracking work and are tested. There is no scene graph, component model, rasteriser, text support or hardware backend yet. Not usable for applications. See the repository README for the roadmap.

MIT licensed.