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Emit floats an f32 can hold, and drop the format! that formats nothing

Browse Source 
CI runs cargo fmt --check and clippy -D warnings, and this branch had
never been through either. Both would have failed it.

The bulk was the generated colour tables: eight significant figures where
an f32 carries about 7.2, so the eighth is noise that rounds away at
compile time and clippy's excessive_precision says so 109 times over.
Fixed in the generator rather than only in the file, so it stays fixed --
and the file is trimmed in place rather than re-derived, because
regenerating it needs a colour-science stack that has nothing to do with
the defect.

The format! in the composer is mine too, from extracting the rendering
tail: the braces in it were escaped because the text used to live inside a
larger template, and once extracted the escapes are noise and the call
formats nothing.

Also here, and clearly not mine: an unused import and a shadowed binding
in dr-gpu, and an unused import in a test. They are pre-existing --
clippy has been failing on master before this branch existed, on lints
like is_multiple_of that arrived with a toolchain rather than with
anyone's code. Fixed because CI cannot go green around them, and called
out because a merge commit is a bad place to quietly edit someone else's
crate.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
dtourolle
2026-08-25 22:28:14 +02:00
co-authored by Claude Opus 5
parent 6925aa2a86
commit 3b5952769b
18 changed files with 490 additions and 315 deletions
Download Patch File Download Diff File Expand all files Collapse all files
core/dr-film/src/bake.rs
+50 -13
View File
@@ -65,7 +65,12 @@ impl<'a> Recipe<'a> {
/// The straightforward reading of a stock: reversal viewed directly,
/// negative printed on the paper its datasheet names.
pub fn new(film: &'a Profile, print: Option<&'a Profile>) -> Self {
Self { film, print, exposure_ev: 0.0, print_exposure_ev: 0.0 }
Self {
film,
print,
exposure_ev: 0.0,
print_exposure_ev: 0.0,
}
}
}
@@ -140,8 +145,7 @@ impl Baked {
let w = if dx == 0 { 1.0 - frac[0] } else { frac[0] }
* if dy == 0 { 1.0 - frac[1] } else { frac[1] }
* if dz == 0 { 1.0 - frac[2] } else { frac[2] };
let e = self.lut
[((base[2] + dz) * n + base[1] + dy) * n + base[0] + dx];
let e = self.lut[((base[2] + dz) * n + base[1] + dy) * n + base[0] + dx];
for c in 0..3 {
out[c] += w * e[c];
}
@@ -192,7 +196,12 @@ pub fn exposure_matrix(film: &Profile) -> [[f32; 3]; 3] {
/// goes: the mask is a fixed density, so balancing mid-grey to neutral cancels
/// it — which is why a printed negative looks like a photograph while a scanned
/// one looks orange.
fn print_balance(film: &Profile, paper: &Profile, exposure_ev: f32, print_exposure_ev: f32) -> [f32; 3] {
fn print_balance(
film: &Profile,
paper: &Profile,
exposure_ev: f32,
print_exposure_ev: f32,
) -> [f32; 3] {
let matrix = exposure_matrix(film);
let scene = MID_GREY * 2f32.powf(exposure_ev);
let mut log_exposure = [0.0f32; 3];
@@ -320,7 +329,11 @@ fn invert_mean_curve(paper: &Profile, density: f32) -> f32 {
let ascending = at(last) >= at(0);
for i in 0..last {
let (lo, hi) = (at(i), at(i + 1));
let brackets = if ascending { lo <= density && density <= hi } else { hi <= density && density <= lo };
let brackets = if ascending {
lo <= density && density <= hi
} else {
hi <= density && density <= lo
};
if brackets && (hi - lo).abs() > f32::EPSILON {
let f = (density - lo) / (hi - lo);
return log_at(i) + (log_at(i + 1) - log_at(i)) * f;
@@ -329,7 +342,11 @@ fn invert_mean_curve(paper: &Profile, density: f32) -> f32 {
// Off the end of the curve: the nearest end is the honest answer, and it
// keeps a badly-scaled contributed profile from producing a NaN that would
// propagate silently through the whole LUT.
if (density <= at(0)) == ascending { paper.log_exposure_min } else { paper.log_exposure_max }
if (density <= at(0)) == ascending {
paper.log_exposure_min
} else {
paper.log_exposure_max
}
}
#[cfg(test)]
@@ -386,7 +403,10 @@ mod tests {
let shadow = baked.apply([0.02; 3]);
let mid = baked.apply([MID_GREY; 3]);
let highlight = baked.apply([0.8; 3]);
assert!(shadow[1] < mid[1] && mid[1] < highlight[1], "{shadow:?} {mid:?} {highlight:?}");
assert!(
shadow[1] < mid[1] && mid[1] < highlight[1],
"{shadow:?} {mid:?} {highlight:?}"
);
}
#[test]
@@ -397,7 +417,10 @@ mod tests {
let baked = bake(&Recipe::new(&film, None));
let shadow = baked.apply([0.02; 3]);
let highlight = baked.apply([0.8; 3]);
assert!(shadow[1] > highlight[1], "not inverted: {shadow:?} -> {highlight:?}");
assert!(
shadow[1] > highlight[1],
"not inverted: {shadow:?} -> {highlight:?}"
);
let mid = baked.apply([MID_GREY; 3]);
assert!(mid[0] > mid[2] * 4.0, "no orange mask: {mid:?}");
}
@@ -418,7 +441,10 @@ mod tests {
"print is not a positive: {shadow:?} {mid:?} {highlight:?}"
);
for grey in [shadow, mid, highlight] {
assert!(spread(grey) < 0.06, "print of a neutral is not neutral: {grey:?}");
assert!(
spread(grey) < 0.06,
"print of a neutral is not neutral: {grey:?}"
);
}
}
@@ -426,7 +452,10 @@ mod tests {
fn exposure_moves_the_print_the_way_it_moves_a_photograph() {
let film = portra();
let paper = endura();
let brighter = bake(&Recipe { exposure_ev: 1.0, ..Recipe::new(&film, Some(&paper)) });
let brighter = bake(&Recipe {
exposure_ev: 1.0,
..Recipe::new(&film, Some(&paper))
});
let base = bake(&Recipe::new(&film, Some(&paper)));
assert!(brighter.apply([MID_GREY; 3])[1] > base.apply([MID_GREY; 3])[1]);
}
@@ -443,11 +472,16 @@ mod tests {
let mut worst = 0.0f32;
for i in 0..40 {
for j in 0..40 {
let rgb = [i as f32 / 39.0, j as f32 / 39.0, ((i + j) % 40) as f32 / 39.0];
let rgb = [
i as f32 / 39.0,
j as f32 / 39.0,
((i + j) % 40) as f32 / 39.0,
];
let mut log_exposure = [0.0f32; 3];
for (l, slot) in log_exposure.iter_mut().enumerate() {
let m = baked.exposure_matrix[l];
*slot = ((m[0] * rgb[0] + m[1] * rgb[1] + m[2] * rgb[2]).max(0.0) + 1e-10).log10();
*slot =
((m[0] * rgb[0] + m[1] * rgb[1] + m[2] * rgb[2]).max(0.0) + 1e-10).log10();
}
let exact = viewing.to_srgb(&film.transmittance(film.density_at(log_exposure)));
let approx = baked.apply(rgb);
@@ -456,7 +490,10 @@ mod tests {
}
}
}
assert!(worst < 1.0 / 255.0, "worst LUT error {worst} exceeds one code value");
assert!(
worst < 1.0 / 255.0,
"worst LUT error {worst} exceeds one code value"
);
}
#[test]
core/dr-film/src/built_in.rs
+108 -27
View File
@@ -6,35 +6,116 @@
/// Each stock's id and its YAML, in the order the converter ran.
pub static BUILT_IN: &[(&str, &str)] = &[
("fujifilm_c200", include_str!("../profiles/fujifilm_c200.yaml")),
("fujifilm_crystal_archive_typeii", include_str!("../profiles/fujifilm_crystal_archive_typeii.yaml")),
("fujifilm_pro_400h", include_str!("../profiles/fujifilm_pro_400h.yaml")),
("fujifilm_provia_100f", include_str!("../profiles/fujifilm_provia_100f.yaml")),
("fujifilm_velvia_100", include_str!("../profiles/fujifilm_velvia_100.yaml")),
("fujifilm_xtra_400", include_str!("../profiles/fujifilm_xtra_400.yaml")),
(
"fujifilm_c200",
include_str!("../profiles/fujifilm_c200.yaml"),
),
(
"fujifilm_crystal_archive_typeii",
include_str!("../profiles/fujifilm_crystal_archive_typeii.yaml"),
),
(
"fujifilm_pro_400h",
include_str!("../profiles/fujifilm_pro_400h.yaml"),
),
(
"fujifilm_provia_100f",
include_str!("../profiles/fujifilm_provia_100f.yaml"),
),
(
"fujifilm_velvia_100",
include_str!("../profiles/fujifilm_velvia_100.yaml"),
),
(
"fujifilm_xtra_400",
include_str!("../profiles/fujifilm_xtra_400.yaml"),
),
("kodak_2383", include_str!("../profiles/kodak_2383.yaml")),
("kodak_2393", include_str!("../profiles/kodak_2393.yaml")),
("kodak_ektachrome_100", include_str!("../profiles/kodak_ektachrome_100.yaml")),
("kodak_ektacolor_edge", include_str!("../profiles/kodak_ektacolor_edge.yaml")),
("kodak_ektar_100", include_str!("../profiles/kodak_ektar_100.yaml")),
("kodak_endura_premier", include_str!("../profiles/kodak_endura_premier.yaml")),
("kodak_gold_200", include_str!("../profiles/kodak_gold_200.yaml")),
("kodak_kodachrome_64", include_str!("../profiles/kodak_kodachrome_64.yaml")),
("kodak_portra_160", include_str!("../profiles/kodak_portra_160.yaml")),
("kodak_portra_400", include_str!("../profiles/kodak_portra_400.yaml")),
("kodak_portra_800", include_str!("../profiles/kodak_portra_800.yaml")),
("kodak_portra_800_push1", include_str!("../profiles/kodak_portra_800_push1.yaml")),
("kodak_portra_800_push2", include_str!("../profiles/kodak_portra_800_push2.yaml")),
("kodak_portra_endura", include_str!("../profiles/kodak_portra_endura.yaml")),
("kodak_supra_endura", include_str!("../profiles/kodak_supra_endura.yaml")),
("kodak_ultra_endura", include_str!("../profiles/kodak_ultra_endura.yaml")),
("kodak_ultramax_400", include_str!("../profiles/kodak_ultramax_400.yaml")),
("kodak_verita_200d", include_str!("../profiles/kodak_verita_200d.yaml")),
("kodak_vision3_50d", include_str!("../profiles/kodak_vision3_50d.yaml")),
("kodak_vision3_200t", include_str!("../profiles/kodak_vision3_200t.yaml")),
("kodak_vision3_250d", include_str!("../profiles/kodak_vision3_250d.yaml")),
("kodak_vision3_500t", include_str!("../profiles/kodak_vision3_500t.yaml")),
(
"kodak_ektachrome_100",
include_str!("../profiles/kodak_ektachrome_100.yaml"),
),
(
"kodak_ektacolor_edge",
include_str!("../profiles/kodak_ektacolor_edge.yaml"),
),
(
"kodak_ektar_100",
include_str!("../profiles/kodak_ektar_100.yaml"),
),
(
"kodak_endura_premier",
include_str!("../profiles/kodak_endura_premier.yaml"),
),
(
"kodak_gold_200",
include_str!("../profiles/kodak_gold_200.yaml"),
),
(
"kodak_kodachrome_64",
include_str!("../profiles/kodak_kodachrome_64.yaml"),
),
(
"kodak_portra_160",
include_str!("../profiles/kodak_portra_160.yaml"),
),
(
"kodak_portra_400",
include_str!("../profiles/kodak_portra_400.yaml"),
),
(
"kodak_portra_800",
include_str!("../profiles/kodak_portra_800.yaml"),
),
(
"kodak_portra_800_push1",
include_str!("../profiles/kodak_portra_800_push1.yaml"),
),
(
"kodak_portra_800_push2",
include_str!("../profiles/kodak_portra_800_push2.yaml"),
),
(
"kodak_portra_endura",
include_str!("../profiles/kodak_portra_endura.yaml"),
),
(
"kodak_supra_endura",
include_str!("../profiles/kodak_supra_endura.yaml"),
),
(
"kodak_ultra_endura",
include_str!("../profiles/kodak_ultra_endura.yaml"),
),
(
"kodak_ultramax_400",
include_str!("../profiles/kodak_ultramax_400.yaml"),
),
(
"kodak_verita_200d",
include_str!("../profiles/kodak_verita_200d.yaml"),
),
(
"kodak_vision3_50d",
include_str!("../profiles/kodak_vision3_50d.yaml"),
),
(
"kodak_vision3_200t",
include_str!("../profiles/kodak_vision3_200t.yaml"),
),
(
"kodak_vision3_250d",
include_str!("../profiles/kodak_vision3_250d.yaml"),
),
(
"kodak_vision3_500t",
include_str!("../profiles/kodak_vision3_500t.yaml"),
),
("kodak_trix", include_str!("../profiles/kodak_trix.yaml")),
("kodak_doublex", include_str!("../profiles/kodak_doublex.yaml")),
(
"kodak_doublex",
include_str!("../profiles/kodak_doublex.yaml"),
),
("kodak_2302", include_str!("../profiles/kodak_2302.yaml")),
];
core/dr-film/src/lib.rs
+6 -2
View File
@@ -37,8 +37,8 @@
//! `tools/film-profiles/convert.py` rather than pasted, so what changed is
//! auditable. The sRGB reflectance basis is Mallett & Yuksel (2019).
mod built_in;
pub mod bake;
mod built_in;
pub mod profile;
pub mod spectrum;
pub mod tables;
@@ -97,7 +97,11 @@ mod tests {
#[test]
fn every_built_in_profile_parses() {
assert_eq!(built_in().len(), BUILT_IN.len(), "a built-in profile failed to parse");
assert_eq!(
built_in().len(),
BUILT_IN.len(),
"a built-in profile failed to parse"
);
}
#[test]
core/dr-film/src/profile.rs
+13 -6
View File
@@ -155,7 +155,10 @@ impl Profile {
));
}
if self.density_curves.len() < 2 {
return Err(format!("{}: density_curves needs at least two samples", self.stock));
return Err(format!(
"{}: density_curves needs at least two samples",
self.stock
));
}
if self.log_exposure_max <= self.log_exposure_min {
return Err(format!(
@@ -184,8 +187,8 @@ impl Profile {
let span = self.log_exposure_max - self.log_exposure_min;
let mut out = [0.0f32; 3];
for (c, slot) in out.iter_mut().enumerate() {
let t = ((log_exposure[c] - self.log_exposure_min) / span).clamp(0.0, 1.0)
* last as f32;
let t =
((log_exposure[c] - self.log_exposure_min) / span).clamp(0.0, 1.0) * last as f32;
let i = (t.floor() as usize).min(last - 1);
let f = t - i as f32;
*slot = self.density_curves[i][c] * (1.0 - f) + self.density_curves[i + 1][c] * f;
@@ -232,8 +235,9 @@ where
{
use serde::de::Error as _;
let v = Vec::<f32>::deserialize(d)?;
v.try_into()
.map_err(|v: Vec<f32>| D::Error::custom(format!("expected {SPECTRUM} samples, got {}", v.len())))
v.try_into().map_err(|v: Vec<f32>| {
D::Error::custom(format!("expected {SPECTRUM} samples, got {}", v.len()))
})
}
#[cfg(test)]
@@ -338,7 +342,10 @@ mod tests {
let p = portra();
let blue = p.base_density[16]; // 460nm
let red = p.base_density[64]; // 700nm
assert!(blue > red + 0.2, "base density blue {blue} red {red} is not a mask");
assert!(
blue > red + 0.2,
"base density blue {blue} red {red} is not a mask"
);
}
#[test]
core/dr-film/src/spectrum.rs
+7 -4
View File
@@ -15,7 +15,7 @@ pub type Spectrum = [f32; SPECTRUM];
/// happens before this is applied — see [`Viewing::to_srgb`].
const XYZ_TO_SRGB: [[f32; 3]; 3] = [
[3.2404542, -1.5371385, -0.4985314],
[-0.9692660, 1.8760108, 0.0415560],
[-0.969266, 1.8760108, 0.041556],
[0.0556434, -0.2040259, 1.0572252],
];
@@ -81,8 +81,8 @@ pub fn blackbody(kelvin: f32) -> Spectrum {
let mut out = [0.0f32; SPECTRUM];
let mut total = 0.0f64;
for (i, slot) in out.iter_mut().enumerate() {
let lambda = f64::from(crate::tables::LAMBDA_MIN + crate::tables::LAMBDA_STEP * i as f32)
* 1e-9;
let lambda =
f64::from(crate::tables::LAMBDA_MIN + crate::tables::LAMBDA_STEP * i as f32) * 1e-9;
let radiance = (2.0 * H * C * C)
/ (lambda.powi(5) * ((H * C / (lambda * KB * f64::from(kelvin))).exp() - 1.0));
*slot = radiance as f32;
@@ -208,7 +208,10 @@ mod tests {
for r in 0..3 {
for c in 0..3 {
let expected = if r == c { 1.0 } else { 0.0 };
assert!((m[r][c] - expected).abs() < 1e-5, "{m:?} is not the identity");
assert!(
(m[r][c] - expected).abs() < 1e-5,
"{m:?} is not the identity"
);
}
}
}
core/dr-film/src/tables.rs
+194 -205
View File
@@ -16,90 +16,89 @@ pub const LAMBDA_STEP: f32 = 5.0;
/// nothing in this crate resamples anything.
pub const SPECTRUM: usize = 81;
/// CIE 1931 2-degree standard observer, x-bar/y-bar/z-bar per wavelength.
pub static OBSERVER: [[f32; 3]; SPECTRUM] = [
[0.001368, 3.9e-05, 0.006450001], // 380nm
[0.002236, 6.4e-05, 0.01054999], // 385nm
[0.004243, 0.00012, 0.02005001], // 390nm
[0.00765, 0.000217, 0.03621], // 395nm
[0.01431, 0.000396, 0.06785001], // 400nm
[0.02319, 0.00064, 0.1102], // 405nm
[0.04351, 0.00121, 0.2074], // 410nm
[0.07763, 0.00218, 0.3713], // 415nm
[0.13438, 0.004, 0.6456], // 420nm
[0.21477, 0.0073, 1.0390501], // 425nm
[0.2839, 0.0116, 1.3856], // 430nm
[0.3285, 0.01684, 1.62296], // 435nm
[0.34828, 0.023, 1.74706], // 440nm
[0.34806, 0.0298, 1.7826], // 445nm
[0.3362, 0.038, 1.77211], // 450nm
[0.3187, 0.048, 1.7441], // 455nm
[0.2908, 0.06, 1.6692], // 460nm
[0.2511, 0.0739, 1.5281], // 465nm
[0.19536, 0.09098, 1.28764], // 470nm
[0.1421, 0.1126, 1.0419], // 475nm
[0.09564, 0.13902, 0.8129501], // 480nm
[0.05795001, 0.1693, 0.6162], // 485nm
[0.03201, 0.20802, 0.46518], // 490nm
[0.0147, 0.2586, 0.3533], // 495nm
[0.0049, 0.323, 0.272], // 500nm
[0.0024, 0.4073, 0.2123], // 505nm
[0.0093, 0.503, 0.1582], // 510nm
[0.0291, 0.6082, 0.1117], // 515nm
[0.06327, 0.71, 0.07824999], // 520nm
[0.1096, 0.7932, 0.05725001], // 525nm
[0.1655, 0.862, 0.04216], // 530nm
[0.2257499, 0.9148501, 0.02984], // 535nm
[0.2904, 0.954, 0.0203], // 540nm
[0.3597, 0.9803, 0.0134], // 545nm
[0.4334499, 0.9949501, 0.008749999], // 550nm
[0.5120501, 1.0, 0.005749999], // 555nm
[0.5945, 0.995, 0.0039], // 560nm
[0.6784, 0.9786, 0.002749999], // 565nm
[0.7621, 0.952, 0.0021], // 570nm
[0.8425, 0.9154, 0.0018], // 575nm
[0.9163, 0.87, 0.001650001], // 580nm
[0.9786, 0.8163, 0.0014], // 585nm
[1.0263, 0.757, 0.0011], // 590nm
[1.0567, 0.6949, 0.001], // 595nm
[1.0622, 0.631, 0.0008], // 600nm
[1.0456, 0.5668, 0.0006], // 605nm
[1.0026, 0.503, 0.00034], // 610nm
[0.9384, 0.4412, 0.00024], // 615nm
[0.8544499, 0.381, 0.00019], // 620nm
[0.7514, 0.321, 0.0001], // 625nm
[0.6424, 0.265, 4.999999e-05], // 630nm
[0.5419, 0.217, 3e-05], // 635nm
[0.4479, 0.175, 2e-05], // 640nm
[0.3608, 0.1382, 1e-05], // 645nm
[0.2835, 0.107, 2.1175824e-22], // 650nm
[0.2187, 0.0816, 0.0], // 655nm
[0.1649, 0.061, 0.0], // 660nm
[0.1212, 0.04458, 0.0], // 665nm
[0.0874, 0.032, 0.0], // 670nm
[0.0636, 0.0232, 0.0], // 675nm
[0.04677, 0.017, 0.0], // 680nm
[0.0329, 0.01192, 0.0], // 685nm
[0.0227, 0.00821, 0.0], // 690nm
[0.01584, 0.005723, 0.0], // 695nm
[0.01135916, 0.004102, 0.0], // 700nm
[0.008110916, 0.002929, 0.0], // 705nm
[0.005790346, 0.002091, 0.0], // 710nm
[0.004109457, 0.001484, 0.0], // 715nm
[0.002899327, 0.001047, 0.0], // 720nm
[0.00204919, 0.00074, 0.0], // 725nm
[0.001439971, 0.00052, 0.0], // 730nm
[0.0009999493, 0.0003611, 0.0], // 735nm
[0.0006900786, 0.0002492, 0.0], // 740nm
[0.0004760213, 0.0001719, 0.0], // 745nm
[0.0003323011, 0.00012, 0.0], // 750nm
[0.0002348261, 8.48e-05, 0.0], // 755nm
[0.0001661505, 6e-05, 0.0], // 760nm
[0.000117413, 4.24e-05, 0.0], // 765nm
[8.307527e-05, 3e-05, 0.0], // 770nm
[5.870652e-05, 2.12e-05, 0.0], // 775nm
[4.150994e-05, 1.499e-05, 0.0], // 780nm
[0.001368, 3.9e-05, 0.006450001], // 380nm
[0.002236, 6.4e-05, 0.01054999], // 385nm
[0.004243, 0.00012, 0.02005001], // 390nm
[0.00765, 0.000217, 0.03621], // 395nm
[0.01431, 0.000396, 0.06785001], // 400nm
[0.02319, 0.00064, 0.1102], // 405nm
[0.04351, 0.00121, 0.2074], // 410nm
[0.07763, 0.00218, 0.3713], // 415nm
[0.13438, 0.004, 0.6456], // 420nm
[0.21477, 0.0073, 1.03905], // 425nm
[0.2839, 0.0116, 1.3856], // 430nm
[0.3285, 0.01684, 1.62296], // 435nm
[0.34828, 0.023, 1.74706], // 440nm
[0.34806, 0.0298, 1.7826], // 445nm
[0.3362, 0.038, 1.77211], // 450nm
[0.3187, 0.048, 1.7441], // 455nm
[0.2908, 0.06, 1.6692], // 460nm
[0.2511, 0.0739, 1.5281], // 465nm
[0.19536, 0.09098, 1.28764], // 470nm
[0.1421, 0.1126, 1.0419], // 475nm
[0.09564, 0.13902, 0.8129501], // 480nm
[0.05795001, 0.1693, 0.6162], // 485nm
[0.03201, 0.20802, 0.46518], // 490nm
[0.0147, 0.2586, 0.3533], // 495nm
[0.0049, 0.323, 0.272], // 500nm
[0.0024, 0.4073, 0.2123], // 505nm
[0.0093, 0.503, 0.1582], // 510nm
[0.0291, 0.6082, 0.1117], // 515nm
[0.06327, 0.71, 0.07824999], // 520nm
[0.1096, 0.7932, 0.05725001], // 525nm
[0.1655, 0.862, 0.04216], // 530nm
[0.2257499, 0.9148501, 0.02984], // 535nm
[0.2904, 0.954, 0.0203], // 540nm
[0.3597, 0.9803, 0.0134], // 545nm
[0.4334499, 0.9949501, 0.008749999], // 550nm
[0.5120501, 1.0, 0.005749999], // 555nm
[0.5945, 0.995, 0.0039], // 560nm
[0.6784, 0.9786, 0.002749999], // 565nm
[0.7621, 0.952, 0.0021], // 570nm
[0.8425, 0.9154, 0.0018], // 575nm
[0.9163, 0.87, 0.001650001], // 580nm
[0.9786, 0.8163, 0.0014], // 585nm
[1.0263, 0.757, 0.0011], // 590nm
[1.0567, 0.6949, 0.001], // 595nm
[1.0622, 0.631, 0.0008], // 600nm
[1.0456, 0.5668, 0.0006], // 605nm
[1.0026, 0.503, 0.00034], // 610nm
[0.9384, 0.4412, 0.00024], // 615nm
[0.8544499, 0.381, 0.00019], // 620nm
[0.7514, 0.321, 0.0001], // 625nm
[0.6424, 0.265, 4.999999e-05], // 630nm
[0.5419, 0.217, 3e-05], // 635nm
[0.4479, 0.175, 2e-05], // 640nm
[0.3608, 0.1382, 1e-05], // 645nm
[0.2835, 0.107, 2.117582e-22], // 650nm
[0.2187, 0.0816, 0.0], // 655nm
[0.1649, 0.061, 0.0], // 660nm
[0.1212, 0.04458, 0.0], // 665nm
[0.0874, 0.032, 0.0], // 670nm
[0.0636, 0.0232, 0.0], // 675nm
[0.04677, 0.017, 0.0], // 680nm
[0.0329, 0.01192, 0.0], // 685nm
[0.0227, 0.00821, 0.0], // 690nm
[0.01584, 0.005723, 0.0], // 695nm
[0.01135916, 0.004102, 0.0], // 700nm
[0.008110916, 0.002929, 0.0], // 705nm
[0.005790346, 0.002091, 0.0], // 710nm
[0.004109457, 0.001484, 0.0], // 715nm
[0.002899327, 0.001047, 0.0], // 720nm
[0.00204919, 0.00074, 0.0], // 725nm
[0.001439971, 0.00052, 0.0], // 730nm
[0.0009999493, 0.0003611, 0.0], // 735nm
[0.0006900786, 0.0002492, 0.0], // 740nm
[0.0004760213, 0.0001719, 0.0], // 745nm
[0.0003323011, 0.00012, 0.0], // 750nm
[0.0002348261, 8.48e-05, 0.0], // 755nm
[0.0001661505, 6e-05, 0.0], // 760nm
[0.000117413, 4.24e-05, 0.0], // 765nm
[8.307527e-05, 3e-05, 0.0], // 770nm
[5.870652e-05, 2.12e-05, 0.0], // 775nm
[4.150994e-05, 1.499e-05, 0.0], // 780nm
];
/// Mallett & Yuksel (2019) sRGB reflectance basis: the three smooth,
@@ -108,139 +107,129 @@ pub static OBSERVER: [[f32; 3]; SPECTRUM] = [
/// This is what makes the exposure step a 3x3 matrix rather than a
/// per-pixel spectral integration -- see [`crate::bake`].
pub static SRGB_BASIS: [[f32; 3]; SPECTRUM] = [
[0.32745741, 0.33186171, 0.34068079], // 380nm
[0.32375058, 0.32968819, 0.34656119], // 385nm
[0.31343946, 0.32786002, 0.35870049], // 390nm
[0.28887938, 0.31917358, 0.39194703], // 395nm
[0.23920568, 0.29432258, 0.46647173], // 400nm
[0.18970204, 0.25869706, 0.5516009], // 405nm
[0.12174607, 0.18889432, 0.68935961], // 410nm
[0.074578271, 0.12538838, 0.80003335], // 415nm
[0.044433159, 0.07868706, 0.87687978], // 420nm
[0.028928632, 0.053143271, 0.9179281], // 425nm
[0.022316653, 0.042288146, 0.9353952], // 430nm
[0.016911307, 0.033318346, 0.94977035], // 435nm
[0.014181107, 0.029755948, 0.95606294], // 440nm
[0.013053143, 0.030331251, 0.95661561], // 445nm
[0.011986164, 0.030988572, 0.95702526], // 450nm
[0.011288715, 0.031686355, 0.95702493], // 455nm
[0.010906066, 0.034669962, 0.95442397], // 460nm
[0.010400713, 0.034551957, 0.95504733], // 465nm
[0.01063736, 0.040684806, 0.94867783], // 470nm
[0.010907663, 0.054460037, 0.9346323], // 475nm
[0.011032712, 0.080905287, 0.908062], // 480nm
[0.011310657, 0.1463483, 0.84234104], // 485nm
[0.011154642, 0.37967964, 0.60916572], // 490nm
[0.01014877, 0.76674427, 0.22310696], // 495nm
[0.0089185821, 0.87621475, 0.11486667], // 500nm
[0.0076855763, 0.91849166, 0.073822768], // 505nm
[0.0067057083, 0.94065556, 0.052638729], // 510nm
[0.005995806, 0.95373188, 0.040272309], // 515nm
[0.0055372566, 0.96164328, 0.032819463], // 520nm
[0.0051937842, 0.96720002, 0.027606196], // 525nm
[0.0050253623, 0.97098975, 0.023984891], // 530nm
[0.0051363628, 0.9728523, 0.022011333], // 535nm
[0.0054332003, 0.97311659, 0.021450205], // 540nm
[0.0058199859, 0.97335107, 0.020828945], // 545nm
[0.0064005728, 0.97335112, 0.020248311], // 550nm
[0.0074495287, 0.97226108, 0.020289391], // 555nm
[0.0085836358, 0.97335102, 0.018065342], // 560nm
[0.010395762, 0.9731485, 0.016455742], // 565nm
[0.013565434, 0.97106131, 0.01537326], // 570nm
[0.019384516, 0.96637131, 0.014244178], // 575nm
[0.032084071, 0.95494197, 0.012973962], // 580nm
[0.074356038, 0.91357899, 0.012064974], // 585nm
[0.62439372, 0.3643488, 0.011257478], // 590nm
[0.91831003, 0.071507243, 0.010182725], // 595nm
[0.94925303, 0.041230434, 0.0095165354], // 600nm
[0.95818783, 0.032423874, 0.0093882927], // 605nm
[0.95818775, 0.03192463, 0.0098876191], // 610nm
[0.95818763, 0.031276033, 0.010536342], // 615nm
[0.95567906, 0.03263037, 0.011690569], // 620nm
[0.95800615, 0.029530872, 0.012462973], // 625nm
[0.95410157, 0.031561761, 0.014336665], // 630nm
[0.94760761, 0.035674218, 0.016718175], // 635nm
[0.93868133, 0.041403005, 0.019915666], // 640nm
[0.92446668, 0.05060426, 0.024929056], // 645nm
[0.90460603, 0.0634343, 0.031959674], // 650nm
[0.8804122, 0.078918245, 0.040669554], // 655nm
[0.84778787, 0.099542743, 0.052669382], // 660nm
[0.80577913, 0.12559576, 0.068625111], // 665nm
[0.75253185, 0.15759091, 0.089877232], // 670nm
[0.6864394, 0.19539824, 0.11816236], // 675nm
[0.61869457, 0.23147447, 0.14983095], // 680nm
[0.54026444, 0.26885214, 0.19088341], // 685nm
[0.47296442, 0.29602916, 0.2310064], // 690nm
[0.4327016, 0.30975499, 0.25754339], // 695nm
[0.40535805, 0.31781588, 0.27682604], // 700nm
[0.38549183, 0.32299035, 0.29151777], // 705nm
[0.37098358, 0.32635385, 0.30266251], // 710nm
[0.3576087, 0.3291439, 0.3132473], // 715nm
[0.3487128, 0.33080873, 0.32047833], // 720nm
[0.34488012, 0.33148269, 0.32363699], // 725nm
[0.34191788, 0.33198455, 0.32609731], // 730nm
[0.33953109, 0.33234117, 0.32812737], // 735nm
[0.3371695, 0.33291201, 0.32991798], // 740nm
[0.33617202, 0.33291928, 0.3309079], // 745nm
[0.33516744, 0.33302767, 0.33180363], // 750nm
[0.33442163, 0.3331797, 0.33239663], // 755nm
[0.33400876, 0.33324703, 0.33274078], // 760nm
[0.33391579, 0.33325935, 0.33282086], // 765nm
[0.33381845, 0.33327505, 0.33290173], // 770nm
[0.33367277, 0.33329433, 0.33302597], // 775nm
[0.33356951, 0.33330942, 0.33311108], // 780nm
[0.3274574, 0.3318617, 0.3406808], // 380nm
[0.3237506, 0.3296882, 0.3465612], // 385nm
[0.3134395, 0.32786, 0.3587005], // 390nm
[0.2888794, 0.3191736, 0.391947], // 395nm
[0.2392057, 0.2943226, 0.4664717], // 400nm
[0.189702, 0.2586971, 0.5516009], // 405nm
[0.1217461, 0.1888943, 0.6893596], // 410nm
[0.07457827, 0.1253884, 0.8000333], // 415nm
[0.04443316, 0.07868706, 0.8768798], // 420nm
[0.02892863, 0.05314327, 0.9179281], // 425nm
[0.02231665, 0.04228815, 0.9353952], // 430nm
[0.01691131, 0.03331835, 0.9497703], // 435nm
[0.01418111, 0.02975595, 0.9560629], // 440nm
[0.01305314, 0.03033125, 0.9566156], // 445nm
[0.01198616, 0.03098857, 0.9570253], // 450nm
[0.01128871, 0.03168635, 0.9570249], // 455nm
[0.01090607, 0.03466996, 0.954424], // 460nm
[0.01040071, 0.03455196, 0.9550473], // 465nm
[0.01063736, 0.04068481, 0.9486778], // 470nm
[0.01090766, 0.05446004, 0.9346323], // 475nm
[0.01103271, 0.08090529, 0.908062], // 480nm
[0.01131066, 0.1463483, 0.842341], // 485nm
[0.01115464, 0.3796796, 0.6091657], // 490nm
[0.01014877, 0.7667443, 0.223107], // 495nm
[0.008918582, 0.8762148, 0.1148667], // 500nm
[0.007685576, 0.9184917, 0.07382277], // 505nm
[0.006705708, 0.9406556, 0.05263873], // 510nm
[0.005995806, 0.9537319, 0.04027231], // 515nm
[0.005537257, 0.9616433, 0.03281946], // 520nm
[0.005193784, 0.9672, 0.0276062], // 525nm
[0.005025362, 0.9709897, 0.02398489], // 530nm
[0.005136363, 0.9728523, 0.02201133], // 535nm
[0.0054332, 0.9731166, 0.0214502], // 540nm
[0.005819986, 0.9733511, 0.02082895], // 545nm
[0.006400573, 0.9733511, 0.02024831], // 550nm
[0.007449529, 0.9722611, 0.02028939], // 555nm
[0.008583636, 0.973351, 0.01806534], // 560nm
[0.01039576, 0.9731485, 0.01645574], // 565nm
[0.01356543, 0.9710613, 0.01537326], // 570nm
[0.01938452, 0.9663713, 0.01424418], // 575nm
[0.03208407, 0.954942, 0.01297396], // 580nm
[0.07435604, 0.913579, 0.01206497], // 585nm
[0.6243937, 0.3643488, 0.01125748], // 590nm
[0.91831, 0.07150724, 0.01018273], // 595nm
[0.949253, 0.04123043, 0.009516535], // 600nm
[0.9581878, 0.03242387, 0.009388293], // 605nm
[0.9581878, 0.03192463, 0.009887619], // 610nm
[0.9581876, 0.03127603, 0.01053634], // 615nm
[0.9556791, 0.03263037, 0.01169057], // 620nm
[0.9580062, 0.02953087, 0.01246297], // 625nm
[0.9541016, 0.03156176, 0.01433667], // 630nm
[0.9476076, 0.03567422, 0.01671817], // 635nm
[0.9386813, 0.041403, 0.01991567], // 640nm
[0.9244667, 0.05060426, 0.02492906], // 645nm
[0.904606, 0.0634343, 0.03195967], // 650nm
[0.8804122, 0.07891824, 0.04066955], // 655nm
[0.8477879, 0.09954274, 0.05266938], // 660nm
[0.8057791, 0.1255958, 0.06862511], // 665nm
[0.7525319, 0.1575909, 0.08987723], // 670nm
[0.6864394, 0.1953982, 0.1181624], // 675nm
[0.6186946, 0.2314745, 0.1498309], // 680nm
[0.5402644, 0.2688521, 0.1908834], // 685nm
[0.4729644, 0.2960292, 0.2310064], // 690nm
[0.4327016, 0.309755, 0.2575434], // 695nm
[0.4053581, 0.3178159, 0.276826], // 700nm
[0.3854918, 0.3229903, 0.2915178], // 705nm
[0.3709836, 0.3263539, 0.3026625], // 710nm
[0.3576087, 0.3291439, 0.3132473], // 715nm
[0.3487128, 0.3308087, 0.3204783], // 720nm
[0.3448801, 0.3314827, 0.323637], // 725nm
[0.3419179, 0.3319845, 0.3260973], // 730nm
[0.3395311, 0.3323412, 0.3281274], // 735nm
[0.3371695, 0.332912, 0.329918], // 740nm
[0.336172, 0.3329193, 0.3309079], // 745nm
[0.3351674, 0.3330277, 0.3318036], // 750nm
[0.3344216, 0.3331797, 0.3323966], // 755nm
[0.3340088, 0.333247, 0.3327408], // 760nm
[0.3339158, 0.3332594, 0.3328209], // 765nm
[0.3338184, 0.3332751, 0.3329017], // 770nm
[0.3336728, 0.3332943, 0.333026], // 775nm
[0.3335695, 0.3333094, 0.3331111], // 780nm
];
/// CIE standard illuminant D50, normalised to unit mean.
pub static ILLUMINANT_D50: [f32; SPECTRUM] = [
0.28500907, 0.31632887, 0.34766031, 0.46076543, 0.57388219, 0.61580487,
0.65773919, 0.67822334, 0.69871914, 0.68582343, 0.67292773, 0.77189179,
0.8708675, 0.94315561, 1.0154437, 1.0350317, 1.054608, 1.0590075,
1.0634069, 1.0851713, 1.1069474, 1.0886397, 1.0703319, 1.0922127,
1.1141052, 1.1192844, 1.124452, 1.1274548, 1.1304576, 1.1593798,
1.188302, 1.1804808, 1.1726596, 1.1817494, 1.1908393, 1.1773616,
1.1638724, 1.1506973, 1.1375107, 1.1444008, 1.1512793, 1.1197383,
1.088209, 1.1125805, 1.1369636, 1.1461582, 1.1553645, 1.1540376,
1.1527225, 1.1334022, 1.1140819, 1.1323314, 1.1505693, 1.1320055,
1.1134418, 1.1281298, 1.1428063, 1.1708207, 1.1988235, 1.1763025,
1.1537816, 1.0853925, 1.0170033, 1.0415727, 1.0661536, 1.0736257,
1.0811094, 0.98780176, 0.89448247, 0.95068587, 1.0068776, 1.0422011,
1.077513, 0.9940052, 0.91049735, 0.7909793, 0.67146125, 0.81828375,
0.96511788, 0.93806949, 0.91100946,
0.2850091, 0.3163289, 0.3476603, 0.4607654, 0.5738822, 0.6158049, 0.6577392, 0.6782233,
0.6987191, 0.6858234, 0.6729277, 0.7718918, 0.8708675, 0.9431556, 1.015444, 1.035032,
1.054608, 1.059008, 1.063407, 1.085171, 1.106947, 1.08864, 1.070332, 1.092213,
1.114105, 1.119284, 1.124452, 1.127455, 1.130458, 1.15938, 1.188302, 1.180481,
1.17266, 1.181749, 1.190839, 1.177362, 1.163872, 1.150697, 1.137511, 1.144401,
1.151279, 1.119738, 1.088209, 1.11258, 1.136964, 1.146158, 1.155364, 1.154038,
1.152723, 1.133402, 1.114082, 1.132331, 1.150569, 1.132005, 1.113442, 1.12813,
1.142806, 1.170821, 1.198824, 1.176303, 1.153782, 1.085392, 1.017003, 1.041573,
1.066154, 1.073626, 1.081109, 0.9878018, 0.8944825, 0.9506859, 1.006878, 1.042201,
1.077513, 0.9940052, 0.9104973, 0.7909793, 0.6714613, 0.8182837, 0.9651179, 0.9380695,
0.9110095,
];
/// CIE standard illuminant D55, normalised to unit mean.
pub static ILLUMINANT_D55: [f32; SPECTRUM] = [
0.37928266, 0.41130471, 0.44333841, 0.57639697, 0.70945552, 0.75371138,
0.79797887, 0.81556713, 0.83316704, 0.81185393, 0.79052917, 0.89349794,
0.99645507, 1.0685542, 1.1406533, 1.1550288, 1.1694044, 1.1662034,
1.1630023, 1.1794499, 1.1958974, 1.1687759, 1.1416427, 1.1567865,
1.1719303, 1.1720235, 1.1721049, 1.1679843, 1.1638637, 1.1884361,
1.2130201, 1.2007514, 1.1884826, 1.1935228, 1.198563, 1.181289,
1.164015, 1.1478119, 1.1316089, 1.1347051, 1.1378131, 1.1010418,
1.0642822, 1.0816726, 1.0990514, 1.1032535, 1.1074439, 1.1020894,
1.096735, 1.0747816, 1.0528283, 1.0637817, 1.0747351, 1.0545045,
1.0342739, 1.0427945, 1.0513035, 1.072442, 1.0935921, 1.0703467,
1.0471014, 0.98728263, 0.92745226, 0.94585534, 0.96427006, 0.97593349,
0.98759692, 0.90256562, 0.81754596, 0.87031076, 0.92307556, 0.95620343,
0.9893313, 0.91301847, 0.83669401, 0.72561205, 0.61451846, 0.74916008,
0.8838017, 0.85988119, 0.83597232,
0.3792827, 0.4113047, 0.4433384, 0.576397, 0.7094555, 0.7537114, 0.7979789, 0.8155671,
0.833167, 0.8118539, 0.7905292, 0.8934979, 0.9964551, 1.068554, 1.140653, 1.155029,
1.169404, 1.166203, 1.163002, 1.17945, 1.195897, 1.168776, 1.141643, 1.156786,
1.17193, 1.172024, 1.172105, 1.167984, 1.163864, 1.188436, 1.21302, 1.200751,
1.188483, 1.193523, 1.198563, 1.181289, 1.164015, 1.147812, 1.131609, 1.134705, 1.137813,
1.101042, 1.064282, 1.081673, 1.099051, 1.103254, 1.107444, 1.102089, 1.096735,
1.074782, 1.052828, 1.063782, 1.074735, 1.054504, 1.034274, 1.042795, 1.051303,
1.072442, 1.093592, 1.070347, 1.047101, 0.9872826, 0.9274523, 0.9458553, 0.9642701,
0.9759335, 0.9875969, 0.9025656, 0.817546, 0.8703108, 0.9230756, 0.9562034, 0.9893313,
0.9130185, 0.836694, 0.725612, 0.6145185, 0.7491601, 0.8838017, 0.8598812, 0.8359723,
];
/// CIE standard illuminant D65, normalised to unit mean.
pub static ILLUMINANT_D65: [f32; SPECTRUM] = [
0.57072795, 0.59740886, 0.62409091, 0.78458177, 0.94507378, 0.99492846,
1.0447843, 1.055895, 1.0670056, 1.0284649, 0.98992529, 1.0937493,
1.1975745, 1.2669063, 1.3362495, 1.3408404, 1.3454313, 1.3285751,
1.3117304, 1.3177945, 1.3238586, 1.2832485, 1.2426385, 1.2457333,
1.2488396, 1.2399776, 1.2311155, 1.2139168, 1.196718, 1.2132658,
1.2298251, 1.2110732, 1.1923213, 1.1902656, 1.1882214, 1.1651185,
1.1420155, 1.1210835, 1.1001515, 1.0970326, 1.0939138, 1.0533585,
1.0128033, 1.020344, 1.0278847, 1.0255596, 1.0232356, 1.0123842,
1.0015327, 0.97635016, 0.95116871, 0.95351327, 0.95585783, 0.93488814,
0.91391845, 0.91499081, 0.91606316, 0.92784419, 0.93962522, 0.91682146,
0.89401769, 0.8451223, 0.79622805, 0.80700753, 0.81778702, 0.83343149,
0.8490771, 0.77630216, 0.70352722, 0.7508158, 0.79810438, 0.82780478,
0.85750517, 0.79187126, 0.72623849, 0.62817019, 0.53010303, 0.64651553,
0.76292802, 0.74338471, 0.72384139,
0.5707279, 0.5974089, 0.6240909, 0.7845818, 0.9450738, 0.9949285, 1.044784, 1.055895,
1.067006, 1.028465, 0.9899253, 1.093749, 1.197574, 1.266906, 1.33625, 1.34084,
1.345431, 1.328575, 1.31173, 1.317794, 1.323859, 1.283249, 1.242638, 1.245733,
1.24884, 1.239978, 1.231116, 1.213917, 1.196718, 1.213266, 1.229825, 1.211073,
1.192321, 1.190266, 1.188221, 1.165118, 1.142016, 1.121083, 1.100151, 1.097033,
1.093914, 1.053359, 1.012803, 1.020344, 1.027885, 1.02556, 1.023236, 1.012384,
1.001533, 0.9763502, 0.9511687, 0.9535133, 0.9558578, 0.9348881, 0.9139185, 0.9149908,
0.9160632, 0.9278442, 0.9396252, 0.9168215, 0.8940177, 0.8451223, 0.796228, 0.8070075,
0.817787, 0.8334315, 0.8490771, 0.7763022, 0.7035272, 0.7508158, 0.7981044, 0.8278048,
0.8575052, 0.7918713, 0.7262385, 0.6281702, 0.530103, 0.6465155, 0.762928, 0.7433847,
0.7238414,
];