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#![allow(dead_code)]
pub const BLACK: Pixel = (0x00, 0x00, 0x00);
pub const WHITE: Pixel = (0xff, 0xff, 0xff);
pub const RED: Pixel = (0xff, 0x00, 0x00);
pub const GREEN: Pixel = (0x00, 0xff, 0x00);
pub const BLUE: Pixel = (0x00, 0x00, 0xff);
pub type Pixel = (u8, u8, u8);
pub fn as_char(p: Pixel) -> char {
let (r, g, b) = p;
let value = r as u16 + g as u16 + b as u16;
if value > 0x240 { 'X' }
else if value > 0x180 { 'x' }
else if value > 0x0c0 { '.' }
else { ' ' }
}