Embedded Graphics Web Simulator

The web simulator is based on embedded-graphics-simulator. This is a sample project demonstrating using a no_std rust-embedded library with Webassembly.

The Web Simulator allows you to use a browser to test embedded-graphics code and run graphics. There is no need to install SDL and its development libraries for running the project. You can see the demo here.

For Development

This library is intended to be used in Rust + Webassembly projects. Check the examples which illustrate how to use the library. Look at the examples in the Embedded Graphics Simulator project for inspiration. You can use wasm-pack to create a ready to go project and add this library as a dependency.

Usage example:

use embedded_graphics_web_simulator::{
    display::WebSimulatorDisplay, output_settings::OutputSettingsBuilder,
};
use wasm_bindgen::prelude::*;
use web_sys::console;

use embedded_graphics::{
    image::Image,
    pixelcolor::{ Rgb565},
    prelude::*,
    primitive_style,
};
use tinybmp::Bmp;


// This is like the `main` function, except for JavaScript.
#[wasm_bindgen(start)]
pub fn main_js() -> Result<(), JsValue> {
    // This provides better error messages in debug mode.
    // It's disabled in release mode so it doesn't bloat up the file size.
    #[cfg(debug_assertions)]
    console_error_panic_hook::set_once();

    let output_settings = OutputSettingsBuilder::new().scale(3).build();
    let mut display = WebSimulatorDisplay::new((128, 128), &output_settings);

    // Load the BMP image
    let bmp = Bmp::from_slice(include_bytes!("./assets/rust-pride.bmp")).unwrap();
    let image: Image<Bmp, Rgb565> = Image::new(&bmp, Point::new(32, 32));
    image
        .draw(&mut display)
        .unwrap_or_else(|_| console::log_1(&"Couldn't draw image".into()));

    Ok(())
}

How it works

Embedded Graphics Web Simulator implements DrawTarget for the HTML <canvas> element.

Credits

This project is based on the embedded-graphics library by @jamwaffles

Build with wasm-pack