Home Original page

GitHub - peterhellberg/w4: A small Zig ⚡ module, primarily meant for my own experiments with WASM-4

A small Zig ⚡ module, primarily meant for my own experiments with WASM-4 🎮

Based on the wasm4.zig template

Important

You might want to install the w4-init tool and use that instead of manually creating the files for your cart.

Usage

You can have zig build retrieve the w4 module if you specify it as a dependency.

Create a build.zig.zon that looks something like this:

.{
    .name = .w4_game,
    .fingerprint = 0x9364c2ea98294635,
    .version = "0.0.0",
    .paths = .{""},
    .dependencies = .{
        .w4 = .{
            .url = "https://github.com/peterhellberg/w4/archive/refs/tags/v0.1.3.tar.gz",
        },
    },
}

Note

If you leave out the hash then zig build will tell you that it is missing the hash, and what it is. Another way to get the hash is to use zig fetch, this is probably how you should do it :)

Then you can add the module in your build.zig like this:

// Add the w4 module to the executable
exe.addModule("w4", b.dependency("w4", .{}).module("w4"));

In your src/main.zig you should now be able to:

const w4 = @import("w4");

export fn start() void {}

export fn update() void {
    const hello = "Hello from Zig!";

    w4.color(2);
    w4.text(hello, 15, 11);
    w4.color(3);
    w4.text(hello, 16, 10);
}