immo 0.1.2

Processing of various images (e.g., drawing of square systems)
Documentation 
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use immo::error::ImageError;
use immo::png::Png;

use std::fs::File;
use std::io::BufWriter;
use std::time::Instant;

const BLACK: (u8, u8, u8, u8) = (0, 0, 0, 255);
const WHITE: (u8, u8, u8, u8) = (255, 255, 255, 255);
const LIGHT_AQUA: (u8, u8, u8, u8) = (170, 222, 240, 255);
const DARK_AQUA: (u8, u8, u8, u8) = (0, 140, 180, 255);
const AQUA: (u8, u8, u8, u8) = (0, 222, 255, 255);

fn main() -> Result<(), ImageError> {
    let start = Instant::now();
    let mut png = Png::new(16, 16);

    png.point(4, 3, BLACK)?;
    png.point(5, 3, BLACK)?;
    png.point(6, 3, BLACK)?;
    png.point(7, 3, BLACK)?;
    png.point(8, 3, BLACK)?;
    png.point(9, 3, BLACK)?;
    png.point(10, 3, BLACK)?;
    png.point(11, 3, BLACK)?;

    png.point(3, 4, BLACK)?;
    png.point(4, 4, WHITE)?;
    png.point(5, 4, LIGHT_AQUA)?;
    png.point(6, 4, WHITE)?;
    png.point(7, 4, AQUA)?;
    png.point(8, 4, AQUA)?;
    png.point(9, 4, DARK_AQUA)?;
    png.point(10, 4, LIGHT_AQUA)?;
    png.point(11, 4, AQUA)?;
    png.point(12, 4, BLACK)?;

    png.point(2, 5, BLACK)?;
    png.point(3, 5, WHITE)?;
    png.point(4, 5, LIGHT_AQUA)?;
    png.point(5, 5, WHITE)?;
    png.point(6, 5, AQUA)?;
    png.point(7, 5, AQUA)?;
    png.point(8, 5, LIGHT_AQUA)?;
    png.point(9, 5, LIGHT_AQUA)?;
    png.point(10, 5, DARK_AQUA)?;
    png.point(11, 5, LIGHT_AQUA)?;
    png.point(12, 5, DARK_AQUA)?;
    png.point(13, 5, BLACK)?;

    png.point(1, 6, BLACK)?;
    png.point(2, 6, WHITE)?;
    png.point(3, 6, LIGHT_AQUA)?;
    png.point(4, 6, WHITE)?;
    png.point(5, 6, AQUA)?;
    png.point(6, 6, WHITE)?;
    png.point(7, 6, WHITE)?;
    png.point(8, 6, WHITE)?;
    png.point(9, 6, WHITE)?;
    png.point(10, 6, LIGHT_AQUA)?;
    png.point(11, 6, DARK_AQUA)?;
    png.point(12, 6, LIGHT_AQUA)?;
    png.point(13, 6, AQUA)?;
    png.point(14, 6, BLACK)?;

    png.point(0, 7, BLACK)?;
    png.point(1, 7, DARK_AQUA)?;
    png.point(2, 7, DARK_AQUA)?;
    png.point(3, 7, DARK_AQUA)?;
    png.point(4, 7, DARK_AQUA)?;
    png.point(5, 7, AQUA)?;
    png.point(6, 7, AQUA)?;
    png.point(7, 7, AQUA)?;
    png.point(8, 7, AQUA)?;
    png.point(9, 7, DARK_AQUA)?;
    png.point(10, 7, DARK_AQUA)?;
    png.point(11, 7, DARK_AQUA)?;
    png.point(12, 7, DARK_AQUA)?;
    png.point(13, 7, DARK_AQUA)?;
    png.point(14, 7, DARK_AQUA)?;
    png.point(15, 7, BLACK)?;

    png.point(1, 8, BLACK)?;
    png.point(2, 8, AQUA)?;
    png.point(3, 8, LIGHT_AQUA)?;
    png.point(4, 8, LIGHT_AQUA)?;
    png.point(5, 8, AQUA)?;
    png.point(6, 8, LIGHT_AQUA)?;
    png.point(7, 8, LIGHT_AQUA)?;
    png.point(8, 8, WHITE)?;
    png.point(9, 8, AQUA)?;
    png.point(10, 8, WHITE)?;
    png.point(11, 8, DARK_AQUA)?;
    png.point(12, 8, LIGHT_AQUA)?;
    png.point(13, 8, DARK_AQUA)?;
    png.point(14, 8, BLACK)?;

    png.point(2, 9, BLACK)?;
    png.point(3, 9, LIGHT_AQUA)?;
    png.point(4, 9, LIGHT_AQUA)?;
    png.point(5, 9, LIGHT_AQUA)?;
    png.point(6, 9, LIGHT_AQUA)?;
    png.point(7, 9, AQUA)?;
    png.point(8, 9, LIGHT_AQUA)?;
    png.point(9, 9, AQUA)?;
    png.point(10, 9, AQUA)?;
    png.point(11, 9, DARK_AQUA)?;
    png.point(12, 9, DARK_AQUA)?;
    png.point(13, 9, BLACK)?;

    png.point(3, 10, BLACK)?;
    png.point(4, 10, AQUA)?;
    png.point(5, 10, LIGHT_AQUA)?;
    png.point(6, 10, LIGHT_AQUA)?;
    png.point(7, 10, LIGHT_AQUA)?;
    png.point(8, 10, AQUA)?;
    png.point(9, 10, AQUA)?;
    png.point(10, 10, DARK_AQUA)?;
    png.point(11, 10, LIGHT_AQUA)?;
    png.point(12, 10, BLACK)?;

    png.point(4, 11, BLACK)?;
    png.point(5, 11, AQUA)?;
    png.point(6, 11, AQUA)?;
    png.point(7, 11, DARK_AQUA)?;
    png.point(8, 11, AQUA)?;
    png.point(9, 11, DARK_AQUA)?;
    png.point(10, 11, LIGHT_AQUA)?;
    png.point(11, 11, BLACK)?;

    png.point(5, 12, BLACK)?;
    png.point(6, 12, DARK_AQUA)?;
    png.point(7, 12, DARK_AQUA)?;
    png.point(8, 12, LIGHT_AQUA)?;
    png.point(9, 12, LIGHT_AQUA)?;
    png.point(10, 12, BLACK)?;

    png.point(6, 13, BLACK)?;
    png.point(7, 13, LIGHT_AQUA)?;
    png.point(8, 13, DARK_AQUA)?;
    png.point(9, 13, BLACK)?;

    png.point(7, 14, BLACK)?;
    png.point(8, 14, BLACK)?;

    let path = String::from("png.png");
    let file = File::create(path).unwrap();
    let w = &mut BufWriter::new(file);

    let mut encoder = png::Encoder::new(w, 16, 16); // Width is 2 pixels and height is 1.
    encoder.set_color(png::ColorType::Rgba);
    encoder.set_depth(png::BitDepth::Eight);

    let mut writer = encoder.write_header().unwrap();

    writer.write_image_data(png.as_slice()).unwrap();

    let end = start.elapsed();
    println!(
        "{}.{:03} second elapsed.",
        end.as_secs(),
        end.subsec_nanos() / 1_000_000
    );

    Ok(())
}