src/main.rs


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fn main() {
    let args: Vec<String> = std::env::args().collect();
    if args.len() != 2 {
        eprintln!("usage: {} palette.png", args[0]);
        std::process::exit(1);
    }

    let pal = image::io::Reader::open(&args[1])
        .expect("failed to open image")
        .decode()
        .expect("decoding failed")
        .to_rgb8();

    println!(r#"#include "px.h""#);
    println!(r"__attribute__(constructor))");
    println!(r"static void set_pxpal(void)");
    println!(r"{{");

    for y in 0..pal.height() {
        for x in 0..pal.width() {
            let pixel = pal.get_pixel(x, y);
            let i = x + y * pal.width();
            println!(
                "\tpxpal[{0}].r={1}; pxpal[{0}].g={2}; pxpal[{0}].b={3};",
                i, pixel[0], pixel[1], pixel[2]
            );
        }
    }

    println!(r"}}")
}