1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

//! Linear encoding

use std::marker::PhantomData;

use num_traits::Float;
use rgb::{RgbSpace, RgbStandard};
use luma::LumaStandard;
use encoding::TransferFn;
use white_point::WhitePoint;

/// A generic standard with linear components.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct Linear<S>(PhantomData<S>);

impl<S: RgbSpace> RgbStandard for Linear<S> {
    type Space = S;
    type TransferFn = LinearFn;
}

impl<Wp: WhitePoint> LumaStandard for Linear<Wp> {
    type WhitePoint = Wp;
    type TransferFn = LinearFn;
}

///Linear color component encoding.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct LinearFn;

impl TransferFn for LinearFn {
    #[inline(always)]
    fn into_linear<T: Float>(x: T) -> T {
        x
    }

    #[inline(always)]
    fn from_linear<T: Float>(x: T) -> T {
        x
    }
}