microdeck/src/modules/counter.rs

use crate::Button;

use super::Module;
use super::{ChannelReceiver, DeviceAccess, HostEvent, ReturnError};

use async_trait::async_trait;
use image::{Rgb, RgbImage};
use imageproc::drawing::draw_text_mut;
use rusttype::{Scale, Font};

/// A module which displays a counter
pub struct Counter;

#[async_trait]
impl Module for Counter {
    async fn run(
        streamdeck: DeviceAccess,
        button_receiver: ChannelReceiver,
        _config: Button,
    ) -> Result<(), ReturnError> {
        let font_data: &[u8] = include_bytes!("../../fonts/SpaceGrotesk.ttf");
        let font: Font<'static> = Font::try_from_bytes(font_data).unwrap();

        let (h, w) = streamdeck.resolution();

        let mut stream = button_receiver.lock().await;
        
        let mut counter: u32 = 0;
        loop {
            if let Some(event) = stream.recv().await {
                match event {
                    HostEvent::ButtonPressed => {
                        counter += 1;
                        let mut image = RgbImage::new(h as u32, w as u32);
                        draw_text_mut(&mut image, Rgb([255, 255, 255]), 10, 10, Scale::uniform(20.0), &font, format!("{}", counter).as_str());
                        streamdeck.write_img(image::DynamicImage::ImageRgb8(image)).await.unwrap();
                    },
                    _ => {}
                }
            }
        }
    }
}