bendn's repos / fimg
fast image operations
Diffstat (limited to 'src/pixels/utility.rs')
-rw-r--r--src/pixels/utility.rs50
1 files changed, 1 insertions, 49 deletions
diff --git a/src/pixels/utility.rs b/src/pixels/utility.rs
index aabadb5..e9cca62 100644
--- a/src/pixels/utility.rs
+++ b/src/pixels/utility.rs
@@ -27,7 +27,7 @@ pub trait Floatify<const N: usize> {
/// computes n / 255
pub fn float(n: u8) -> FF32 {
- // SAFETY: 0..=255 / 0..=255 maynt ever be NAN / INF
+ // SAFETY: 0..=255 / 0..=255 mayn't ever be NAN / INF
unsafe { FF32::new(n as f32) / FF32::new(255.0) }
}
@@ -39,51 +39,3 @@ impl<const N: usize> Floatify<N> for [u8; N] {
#[rustfmt::skip]
impl<const N:usize>Floatify<N>for[FF32;N]{fn float(self)->[FF32;N]{self}}
-
-pub trait PMap<T, R, const N: usize> {
- /// think of it like a `a.zip(b).map(f).collect::<[]>()`
- fn pmap(self, with: Self, f: impl FnMut(T, T) -> R) -> [R; N];
-}
-
-impl<const N: usize, T: Copy, R: Copy> PMap<T, R, N> for [T; N] {
- fn pmap(self, with: Self, mut f: impl FnMut(T, T) -> R) -> [R; N] {
- let mut iter = self.into_iter().zip(with).map(|(a, b)| f(a, b));
- std::array::from_fn(|_| iter.next().unwrap())
- }
-}
-
-pub trait Trunc<T, const N: usize> {
- /// it does `a[..a.len() - 1].try_into().unwrap()`.
- fn trunc(&self) -> [T; N - 1];
-}
-
-impl<const N: usize, T: Copy> Trunc<T, N> for [T; N] {
- fn trunc(&self) -> [T; N - 1] {
- self[..N - 1].try_into().unwrap()
- }
-}
-
-pub trait Push<T, const N: usize> {
- fn and(self, and: T) -> [T; N + 1];
-}
-
-impl<const N: usize, T> Push<T, N> for [T; N] {
- fn and(self, and: T) -> [T; N + 1] {
- let mut iter = self.into_iter().chain(std::iter::once(and));
- std::array::from_fn(|_| iter.next().unwrap())
- }
-}
-
-#[test]
-fn trunc() {
- let x = [1];
- assert_eq!(x.trunc(), []);
- let x = [1, 2, 3, 4];
- assert_eq!(x.trunc(), [1, 2, 3]);
-}
-
-#[test]
-fn append() {
- let x = [1];
- assert_eq!(x.and(5), [1, 5]);
-}