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use super::{Image, ImageTryCreate};
use num_integer::Integer;
#[allow(dead_code)]
pub struct Checkerboard;
impl Checkerboard {
#[allow(dead_code)]
pub fn checkerboard(width: u8, height: u8, color0: u8, color1: u8) -> Image {
if width == 0 || height == 0 {
return Image::empty();
}
let mut pixels = Vec::<u8>::new();
for y in 0..(height as u16) {
for x in 0..(width as u16) {
let color = if (x + y).is_even() { color0 } else { color1 };
pixels.push(color);
}
}
assert_eq!(pixels.len(), (width as usize) * (height as usize));
Image::try_create(width, height, pixels).expect("image")
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_10000_checkerboard() {
// Act
let actual: Image = Checkerboard::checkerboard(5, 4, 0, 1);
// Assert
let expected_pixels: Vec<u8> = vec![
0, 1, 0, 1, 0,
1, 0, 1, 0, 1,
0, 1, 0, 1, 0,
1, 0, 1, 0, 1,
];
let expected: Image = Image::try_create(5, 4, expected_pixels).expect("image");
assert_eq!(actual, expected);
}
}
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