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, M1. The Surface and InputSource traits and damage tracking work and are tested, and denise-render rasterises into them. There is no scene graph, component model, text support or hardware backend yet. Not usable for applications. See the repository README for the roadmap.

MIT licensed.