Module melpomene::sim_drivers::emb_display

Simulated display driver

This is an early attempt at a “frame buffer” style display driver. It uses the embedded-graphics simulator crate to act as a display in simulated environments.

This implementation is sort of a work in progress, it isn’t really a great long-term solution, but rather “okay for now”.

A framebuffer of pixels is allocated for the entire display on registration. This could be, for example, 400x240 pixels.

The driver will then allow for a certain number of “sub frames” to be requested.

These sub frames could be for the entire display (400x240), or a portion of it, for example 200x120 pixels.

Clients of the driver can draw into the sub-frames that they receive, then send them back to be rendered into the total frame. Any data in the client’s sub-frame will replace the current contents of the whole frame buffer.

Structs

• CommanderTask 🔒
  This task is spawned by the call to SimDisplay::register. It is a single async function that will process requests, and periodically redraw the framebuffer.
• Context 🔒
• SimDisplay
  Implements the EmbDisplayService driver using the embedded-graphics simulator.

Functions

• draw_to 🔒
• frame_display 🔒
  Create and return a Simulator display object from raw pixel data.
• handle_key_event 🔒
• render_loop 🔒
• sim_key_to_key_event 🔒