wlr-capture

The shared engine behind the wlr-utils tools (wlr-chooser, wlr-pip). Two reusable bricks plus the overlay UI helpers they share:

• wl — a native Wayland client that enumerates foreign toplevels and outputs (ext-foreign-toplevel-list-v1) and captures them at full resolution via ext-image-capture-source-v1 + ext-image-copy-capture-v1. It computes the format-correct stride (so it works where grim 1.5 fails with "Invalid stride"), and prefers a zero-copy GPU dma-buf path (allocated through gbm) with an automatic CPU shm fallback. Capture is occlusion-independent and damage-driven (windows on other workspaces stream live).
• render — an egui → egui_glow rendering core on an EGL/GLES context bound to a wl_surface, plus zero-copy dma-buf → GL texture import (EGL_EXT_image_dma_buf_import). Any windowing host binds a Gpu to its surface and drives one egui frame per repaint.
• theme / i18n / icons — TOML theming, Fluent localisation (13 languages), and .desktop/icon-theme app-icon resolution.

Status

This is primarily an internal library for the wlr-utils binaries; the public API is not yet stabilised and may change between minor versions. It is published so the tools can depend on it from crates.io. The gpu feature (on by default) pulls in gbm for the dma-buf path; disable it (--no-default-features) for a pure-CPU build.

License

Licensed under either of Apache-2.0 or MIT at your option.