wayland-epd

epd-wayland improves the visual fidelity of the modern Linux/UNIX graphical desktop on electrophoretic / e-reader displays by communicating rendering requirements from application to display driver. Latency-focused free and open source solutions such as Modos Glider and the Pine64 PineNote support a number of operating modes that balance latency, bit depth, and display artifacts. Mostly static content such as text benefits from slower, high-fidelity updates while dynamic content such as video playback or scrolling surfaces requires higher framerates to be displayed in a non-disruptive way. Integrations exist that address this problem on a per-window level, but in practice these still rely on a driver-internal refresh for most applications. epd-wayland allows applications to communicate rendering preferences on a more granular level to the wayland compositor, which in turn can communicate these to the display driver or controller. The result are native graphical applications whose textual outputs and menus are displayed clearly from the start while seamlessly switching to low-latency updates for regions that demand it.