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Diffstat (limited to 'third_party/rust/wgpu-types/src/math.rs')
-rw-r--r-- | third_party/rust/wgpu-types/src/math.rs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/third_party/rust/wgpu-types/src/math.rs b/third_party/rust/wgpu-types/src/math.rs new file mode 100644 index 0000000000..593e5d810c --- /dev/null +++ b/third_party/rust/wgpu-types/src/math.rs @@ -0,0 +1,31 @@ +//! Utilitary math functions. + +use std::ops::{Add, Rem, Sub}; + +/// +/// Aligns a `value` to an `alignment`. +/// +/// Returns the first number greater than or equal to `value` that is also a +/// multiple of `alignment`. If `value` is already a multiple of `alignment`, +/// `value` will be returned. +/// +/// # Examples +/// +/// ``` +/// # use wgpu_types::math::align_to; +/// assert_eq!(align_to(253, 16), 256); +/// assert_eq!(align_to(256, 16), 256); +/// assert_eq!(align_to(0, 16), 0); +/// ``` +/// +pub fn align_to<T>(value: T, alignment: T) -> T +where + T: Add<Output = T> + Copy + Default + PartialEq<T> + Rem<Output = T> + Sub<Output = T>, +{ + let remainder = value % alignment; + if remainder == T::default() { + value + } else { + value + alignment - remainder + } +} |