Deno SDL2

deno_sdl2 provides bindings to sdl2, sdl2_ttf and sdl2_image.

https://user-images.githubusercontent.com/34997667/160436698-9045ba0c-3fc8-45f9-8038-4194e5d3dcc8.mov

get started

import { EventType, WindowBuilder } from "https://deno.land/x/sdl2/mod.ts";

const window = new WindowBuilder("Hello, Deno!", 640, 480).build();
const canvas = window.canvas();

for (const event of window.events()) {
  if (event.type == EventType.Quit) {
    break;
  } else if (event.type == EventType.Draw) {
    // Rainbow effect
    const r = Math.sin(Date.now() / 1000) * 127 + 128;
    const g = Math.sin(Date.now() / 1000 + 2) * 127 + 128;
    const b = Math.sin(Date.now() / 1000 + 4) * 127 + 128;
    canvas.setDrawColor(Math.floor(r), Math.floor(g), Math.floor(b), 255);
    canvas.clear();
    canvas.present();
  }
}
~> deno run --allow-ffi --unstable https://deno.land/x/sdl2/examples/hello.ts

installing sdl2

Follow https://wiki.libsdl.org/Installation to install the dynamic library.

TL;DR

MacOS (arm64/x64):

brew install sdl2 sdl2_image sdl2_ttf

Make sure the libraries is in your system's library search paths, if not already:

sudo ln -s /opt/homebrew/lib/libSDL2.dylib /usr/local/lib/
sudo ln -s /opt/homebrew/lib/libSDL2_image.dylib /usr/local/lib/
sudo ln -s /opt/homebrew/lib/libSDL2_ttf.dylib /usr/local/lib/

Additionally, you can set DENO_SDL2_PATH to point to the directory where these three libraries are located.

Linux (x64):

sudo apt install libsdl2-dev libsdl2-image-dev libsdl2-ttf-dev

Windows is not supported, it might work but I can't maintain it.

security

you need --allow-ffi --unstable to use SDL2. deno_sdl2 needs access to system's SDL2 library. Deno's permission model does not work well with FFI libraries, use at your own risk.

projects using deno_sdl2

license

MIT