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Add absolute conversion matrices for ACES2065-1 #164

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Merged
tomcur merged 1 commit into from
Apr 25, 2025
Merged

Add absolute conversion matrices for ACES2065-1 #164

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44 changes: 44 additions & 0 deletions color/src/colorspace.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -848,6 +848,50 @@ impl ColorSpace for Aces2065_1 {
matvecmul(&LINEAR_SRGB_TO_ACES2065_1, src)
}

fn to_linear_srgb_absolute(src: [f32; 3]) -> [f32; 3] {
// XYZ_to_lin_sRGB * ACES2065_1_to_XYZ
const ACES2065_1_TO_LINEAR_SRGB: [[f32; 3]; 3] = [
[
54_120_196_967_290_615. / 21_154_043_450_084_358.,
-320_017_885_460_000. / 285_865_452_028_167.,
-564_067_687_050. / 1_439_638_182_257.,
],
[
-65_267_199_138_999_760. / 234_786_371_866_236_861.,
320_721_924_808_012_000. / 234_786_371_866_236_861.,
-2_987_552_619_450. / 31_956_767_642_063.,
],
[
-581_359_048_862_990. / 33_857_690_407_037_013.,
-457_168_407_800_000. / 3_077_971_855_185_183.,
4_981_730_664_150. / 4_608_369_457_879.,
],
];
matvecmul(&ACES2065_1_TO_LINEAR_SRGB, src)
}

fn from_linear_srgb_absolute(src: [f32; 3]) -> [f32; 3] {
// XYZ_to_ACES2065_1 * lin_sRGB_to_XYZ
const LINEAR_SRGB_TO_ACES2065_1: [[f32; 3]; 3] = [
[
26_324_697_889_654. / 60_805_826_029_215.,
95_867_335_448_462. / 255_384_469_322_703.,
34_545_867_731_048. / 182_417_478_087_645.,
],
[
1_068_725_544_495_979. / 11_952_668_021_931_000.,
9_008_998_273_654_297. / 11_033_232_020_244_000.,
2_110_950_307_239_113. / 20_490_288_037_596_000.,
],
[
267_367_106. / 13_953_194_325.,
2_967_477_727. / 25_115_749_785.,
33_806_406_089. / 35_879_642_550.,
],
];
matvecmul(&LINEAR_SRGB_TO_ACES2065_1, src)
}

fn clip([r, g, b]: [f32; 3]) -> [f32; 3] {
[
r.clamp(-65504., 65504.),
Expand Down