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canvas: add parameter to constructor to set background color.
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This commit is contained in:
Bill Thiede
2021-07-16 22:33:22 -07:00
parent 7609201c16
commit e430e3769e
4 changed files with 16 additions and 8 deletions
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10
rtchallenge/src/canvas.rs
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@@ -21,8 +21,8 @@ pub struct Canvas {
}
impl Canvas {
pub fn new(width: usize, height: usize) -> Canvas {
let pixels = vec![Color::new(1., 0., 1.); width * height];
pub fn new(width: usize, height: usize, background: Color) -> Canvas {
let pixels = vec![background; width * height];
Canvas {
width,
height,
@@ -78,7 +78,8 @@ mod tests {
#[test]
fn create_canvas() {
let c = Canvas::new(10, 20);
let bg = Color::new(0.0, 0.0, 0.0);
let c = Canvas::new(10, 20, bg);
assert_eq!(c.width, 10);
assert_eq!(c.height, 20);
let black = Color::new(0., 0., 0.);
@@ -89,7 +90,8 @@ mod tests {
#[test]
fn write_to_canvas() {
let mut c = Canvas::new(10, 20);
let bg = Color::new(0.2, 0.2, 0.2);
let mut c = Canvas::new(10, 20, bg);
let red = Color::new(1., 0., 0.);
c.set(2, 3, red);
assert_eq!(c.get(2, 3), red);