oxihuman-viewer 0.2.1

wgpu/WebGPU rendering adapter for OxiHuman
Documentation 
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

// Copyright (C) 2026 COOLJAPAN OU (Team KitaSan) / SPDX-License-Identifier: Apache-2.0 / #![allow(dead_code)]
#![allow(dead_code)]

//! Film look-up table (LUT) color grading.

use std::f32::consts::PI;

/// Configuration for film lookup.
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct FilmLookupConfig {
    pub intensity: f32,
    pub contrast: f32,
    pub saturation: f32,
    pub temperature: f32,
    pub tint: f32,
}

#[allow(dead_code)]
pub fn default_film_lookup() -> FilmLookupConfig {
    FilmLookupConfig { intensity: 0.5, contrast: 1.0, saturation: 1.0, temperature: 6500.0, tint: 0.0 }
}

#[allow(dead_code)]
pub fn set_film_lookup_intensity(cfg: &mut FilmLookupConfig, value: f32) {
    cfg.intensity = value.clamp(0.0_f32, 1.0_f32);
}

#[allow(dead_code)]
pub fn set_film_lookup_contrast(cfg: &mut FilmLookupConfig, value: f32) {
    cfg.contrast = value.clamp(0.1_f32, 10.0_f32);
}

#[allow(dead_code)]
pub fn set_film_lookup_saturation(cfg: &mut FilmLookupConfig, value: f32) {
    cfg.saturation = value.clamp(0.0_f32, 1.0_f32);
}

#[allow(dead_code)]
pub fn set_film_lookup_temperature(cfg: &mut FilmLookupConfig, value: f32) {
    cfg.temperature = value.clamp(1000.0_f32, 20000.0_f32);
}

#[allow(dead_code)]
pub fn set_film_lookup_tint(cfg: &mut FilmLookupConfig, value: f32) {
    cfg.tint = value.clamp(0.0_f32, 1.0_f32);
}

#[allow(dead_code)]
pub fn film_lookup_weight(cfg: &FilmLookupConfig) -> f32 {
    (cfg.intensity * (PI * 0.25).sin()).clamp(0.0, 1.0)
}

#[allow(dead_code)]
pub fn blend_film_lookup(a: &FilmLookupConfig, b: &FilmLookupConfig, t: f32) -> FilmLookupConfig {
    let t = t.clamp(0.0, 1.0);
    FilmLookupConfig {
        intensity: a.intensity + (b.intensity - a.intensity) * t,
        contrast: a.contrast + (b.contrast - a.contrast) * t,
        saturation: a.saturation + (b.saturation - a.saturation) * t,
        temperature: a.temperature + (b.temperature - a.temperature) * t,
        tint: a.tint + (b.tint - a.tint) * t,
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_default() {
        let cfg = default_film_lookup();
        assert!((cfg.intensity - 0.5_f32).abs() < 1e-3);
    }

    #[test]
    fn test_set_intensity() {
        let mut cfg = default_film_lookup();
        set_film_lookup_intensity(&mut cfg, 0.7);
        assert!((cfg.intensity - 0.7).abs() < 1e-6);
    }

    #[test]
    fn test_set_contrast() {
        let mut cfg = default_film_lookup();
        set_film_lookup_contrast(&mut cfg, 0.8);
        assert!((cfg.contrast - 0.8).abs() < 1e-6);
    }

    #[test]
    fn test_set_saturation() {
        let mut cfg = default_film_lookup();
        set_film_lookup_saturation(&mut cfg, 0.6);
        assert!((cfg.saturation - 0.6).abs() < 1e-6);
    }

    #[test]
    fn test_set_temperature() {
        let mut cfg = default_film_lookup();
        set_film_lookup_temperature(&mut cfg, 0.5);
        assert!((cfg.temperature - 0.5).abs() < 1e-6);
    }

    #[test]
    fn test_set_tint() {
        let mut cfg = default_film_lookup();
        set_film_lookup_tint(&mut cfg, 0.4);
        assert!((cfg.tint - 0.4).abs() < 1e-6);
    }

    #[test]
    fn test_weight() {
        let cfg = default_film_lookup();
        let w = film_lookup_weight(&cfg);
        assert!((0.0..=1.0).contains(&w));
    }

    #[test]
    fn test_blend() {
        let a = default_film_lookup();
        let mut b = default_film_lookup();
        b.intensity = 1.0;
        let mid = blend_film_lookup(&a, &b, 0.5);
        assert!((mid.intensity - 0.75_f32).abs() < 1e-3);
    }

    #[test]
    fn test_blend_zero() {
        let a = default_film_lookup();
        let b = default_film_lookup();
        let r = blend_film_lookup(&a, &b, 0.0);
        assert!((r.intensity - a.intensity).abs() < 1e-6);
    }

    #[test]
    fn test_blend_one() {
        let a = default_film_lookup();
        let b = default_film_lookup();
        let r = blend_film_lookup(&a, &b, 1.0);
        assert!((r.intensity - b.intensity).abs() < 1e-6);
    }

    #[test]
    fn test_blend_clamp() {
        let a = default_film_lookup();
        let b = default_film_lookup();
        let r = blend_film_lookup(&a, &b, 2.0);
        assert!((r.intensity - b.intensity).abs() < 1e-6);
    }
}