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Expose enlargeable trait #2451

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Expose enlargeable trait #2451

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a71cd9a
expose enlargeable trait
Glatzel Apr 15, 2025
ff343a5
add doc to `Enlargeable`
Glatzel Apr 15, 2025
6248979
fix build problem
Glatzel Apr 15, 2025
7a69dd0
revert encoder
Glatzel Apr 15, 2025
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2 changes: 1 addition & 1 deletion src/lib.rs
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Expand Up @@ -167,7 +167,7 @@ pub use crate::buffer_::{
pub use crate::flat::FlatSamples;

// Traits
pub use crate::traits::{EncodableLayout, Pixel, PixelWithColorType, Primitive};
pub use crate::traits::{EncodableLayout, Enlargeable, Pixel, PixelWithColorType, Primitive};

// Opening and loading images
pub use crate::dynimage::{
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5 changes: 5 additions & 0 deletions src/traits.rs
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Expand Up @@ -71,8 +71,12 @@ declare_primitive!(f64: (0.0)..1.0);
/// An `Enlargable::Larger` value should be enough to calculate
/// the sum (average) of a few hundred or thousand Enlargeable values.
pub trait Enlargeable: Sized + Bounded + NumCast {
/// A type with larger capacity to calculate
/// the sum (average) of a few hundred or thousand Enlargeable values.
type Larger: Copy + NumCast + Num + PartialOrd<Self::Larger> + Clone + Bounded + AddAssign;

/// Convert `Larger` type to `Self` type.
/// Clamp value that exceeds the max value and min value of `Self` type.
fn clamp_from(n: Self::Larger) -> Self {
if n > Self::max_value().to_larger() {
Self::max_value()
Expand All @@ -83,6 +87,7 @@ pub trait Enlargeable: Sized + Bounded + NumCast {
}
}

/// Convert `Self` type to `Larger` type.
fn to_larger(self) -> Self::Larger {
NumCast::from(self).unwrap()
}
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