gongtracker/textium/examples/render_atlas.rs

extern crate textium;
extern crate rusttype;

use rusttype::{FontCollection};

/// An array of all of the ascii printable characters.
pub const ASCII: &'static [char] = &[
    ' ', '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/',
    ':', ';', '<', '=', '>', '?', '[', ']', '\\', '|', '{', '}', '^', '~', '_', '@',
    '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
    'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E',
    'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U',
    'V', 'W', 'X', 'Y', 'Z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
];

fn main() {
    let font_data = include_bytes!("Gudea-Regular.ttf");
    let font = FontCollection::from_bytes(font_data as &[u8])
        .into_font().unwrap();
    let font = textium::Font::new(font);

    let chrs = ASCII.iter().cloned();
    let (atlas, bitmap, line_height) = font.make_atlas(chrs, 40.0, 1, 64, 64);

    // println!("{:?}", atlas.glyph_data);
    for line in bitmap.lines() {
        print!("{:03} ", line.len());
        for &pixel in line {
            if pixel == 0 {
                print!(" ");
            } else {
                print!("#");
            }
        }
        println!("");
    }
}