picto 0.4.4

Image handling library.
Documentation 
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//            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
//                    Version 2, December 2004
//
// Copyleft (ↄ) meh. <meh@schizofreni.co> | http://meh.schizofreni.co
//
// Everyone is permitted to copy and distribute verbatim or modified
// copies of this license document, and changing it is allowed as long
// as the name is changed.
//
//            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
//   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
//
//  0. You just DO WHAT THE FUCK YOU WANT TO.

extern crate clap;
use clap::{App, Arg};

extern crate picto;
use picto::{color::Rgb, processing::prelude::*};

extern crate term_size;

const UPPER: char = '▀';
const LOWER: char = '▄';

fn main() {
	let matches = App::new("draw")
		.version(env!("CARGO_PKG_VERSION"))
		.about("Draw an image in your terminal.")
		.arg(
			Arg::with_name("INPUT")
				.index(1)
				.required(true)
				.help("The path to the image to draw."),
		)
		.arg(
			Arg::with_name("margin")
				.short("m")
				.long("margin")
				.takes_value(true)
				.help("Add a margin around the picture."),
		)
		.get_matches();

	let margin = matches.value_of("margin").unwrap_or("0").parse::<usize>().unwrap();
	let (width, height) = term_size::dimensions().expect("not a terminal?");
	let (width, height) = (width - (margin * 2), (height - (margin * 2)) * 2);
	let image = picto::read::from_path::<Rgb, u8, _>(matches.value_of("INPUT").unwrap())
		.unwrap()
		.scale_to::<scaler::Lanczos3>(width as u32, height as u32);

	let offset = (width as u32 - image.width()) / 2;

	println!("");
	for y in 0..image.height() / 2 {
		let y = y * 2;

		print!("{:1$}", "", offset as usize);
		for x in 0..image.width() {
			let (top, bottom): ((u8, u8, u8), (u8, u8, u8)) = (image.get(x, y).to_pixel(), image.get(x, y + 1).to_pixel());

			print!(
				"\x1B[38;2;{};{};{}m\
			        \x1B[48;2;{};{};{}m{}\x1B[0m",
				top.0, top.1, top.2, bottom.0, bottom.1, bottom.2, UPPER
			);
		}
		println!("");
	}
	println!("");
}