extern crate vrtue;
use vrtue::ega;
use vrtue::ega::{Compression, Tiling};

extern crate image;

use std::env;
use std::io::Read;
use std::path::Path;

fn main() {
  let args: Vec<String> = env::args().collect();
  let filename;
  if args.len() > 1 {
    filename = &args[1] as &str;
  } else {
    filename = "data/SHAPES.EGA";
  }

  let mut file = std::fs::File::open(Path::new(filename))
    .expect(&format!("failed opening EGA file: {}", filename));
  let mut ega_vec = Vec::<u8>::new();

  file.read_to_end(&mut ega_vec).expect("Read EGA file");
  let ega_page = ega::decode(&ega_vec, Compression::UNCOMPRESSED, Tiling::TILED(16));
  for (i, tilepixels) in ega_page.iter().enumerate() {
    let out_name = format!("out/{}.png", i);
    let out_file = std::fs::File::create(Path::new(&out_name)).expect("open out file");
    let enc = image::png::PNGEncoder::new(out_file);
    enc.encode(&tilepixels, 16, 16, image::ColorType::RGBA(8)).expect("write png");
  }
}