Expand description
Interface for screens and displays.
The interfaces exposed here cover both configurable (ScreenSetup), and
less configurable hardware (only Screen).
It’s composed of 4 main kinds of requests:
- set power,
- read configuration (e.g.
get_resolution), - configure (e.g.
set_invert), - write buffer.
All requests, except for Screen::set_power, can return OFF under some
circumstances.
For buffer writes, it’s when the display is powered off.
While the display is not powered on, the user could try to configure it. In
that case, the driver MUST either cache the value, or return OFF. This is
to let the user power the display in the desired configuration.
Configuration reads shall return the actual state of the display. In situations where a parameter cannot be configured (e.g. fixed resolution), they return value may be hardcoded. Otherwise, the driver should query the hardware directly, and return OFF if it’s not powered.
Configuration sets cause a command_complete callback unless noted
otherwise.
Enums§
- Screen
Pixel Format - How pixels are encoded for the screen.
- Screen
Rotation
Traits§
- Screen
- Basic interface for screens.
- Screen
Advanced - Screen
Client - Screen
Setup - Interface to configure the screen.
- Screen
Setup Client