oculante/src/main.rs

extern crate piston_window;

use clap;
use clap::{App, Arg, SubCommand};
use piston_window::*;

fn main() {
    let matches = App::new("Oculante")
        .arg(
            Arg::with_name("INPUT")
                .help("Display this image")
                .required(true)
                .index(1),
        )
        .get_matches();

    let img = matches.value_of("INPUT").unwrap();

    let opengl = OpenGL::V3_2;
    let mut window: PistonWindow = WindowSettings::new("Oculante", [300, 300])
        .exit_on_esc(true)
        .graphics_api(opengl)
        .build()
        .unwrap();

    match Texture::from_path(
        &mut window.create_texture_context(),
        &img,
        Flip::None,
        &TextureSettings::new(),
    ) {
        Ok(texture) => {
            window.set_lazy(true);
            while let Some(e) = window.next() {
                window.draw_2d(&e, |c, g, _| {
                    clear([1.0; 4], g);
                    image(&texture, c.transform, g);
                });
            }
        }
        Err(e) => println!("Could not create texture. {}", e),
    }
}