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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169

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

//! Mipmap level visualization for texture debugging.

#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct MipmapViewConfig {
    pub force_level: Option<u32>,
    pub show_level_colors: bool,
    pub max_level: u32,
}

#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct MipmapLevel {
    pub level: u32,
    pub width: u32,
    pub height: u32,
}

#[allow(dead_code)]
pub fn default_mipmap_view_config() -> MipmapViewConfig {
    MipmapViewConfig {
        force_level: None,
        show_level_colors: true,
        max_level: 12,
    }
}

#[allow(dead_code)]
pub fn compute_mip_levels(width: u32, height: u32) -> u32 {
    let max_dim = width.max(height);
    if max_dim == 0 {
        return 0;
    }
    (max_dim as f32).log2().floor() as u32 + 1
}

#[allow(dead_code)]
pub fn mip_dimensions(base_width: u32, base_height: u32, level: u32) -> (u32, u32) {
    let w = (base_width >> level).max(1);
    let h = (base_height >> level).max(1);
    (w, h)
}

#[allow(dead_code)]
pub fn level_color(level: u32) -> [f32; 3] {
    match level {
        0 => [0.0, 1.0, 0.0],
        1 => [0.5, 1.0, 0.0],
        2 => [1.0, 1.0, 0.0],
        3 => [1.0, 0.5, 0.0],
        4 => [1.0, 0.0, 0.0],
        5 => [1.0, 0.0, 0.5],
        6 => [1.0, 0.0, 1.0],
        7 => [0.5, 0.0, 1.0],
        _ => [0.3, 0.3, 0.3],
    }
}

#[allow(dead_code)]
pub fn estimate_mip_level(texel_density: f32) -> u32 {
    if texel_density <= 0.0 {
        return 0;
    }
    texel_density.log2().max(0.0).floor() as u32
}

#[allow(dead_code)]
pub fn total_mip_texels(base_width: u32, base_height: u32) -> u64 {
    let levels = compute_mip_levels(base_width, base_height);
    let mut total = 0u64;
    for l in 0..levels {
        let (w, h) = mip_dimensions(base_width, base_height, l);
        total += (w as u64) * (h as u64);
    }
    total
}

#[allow(dead_code)]
pub fn generate_mip_chain(base_width: u32, base_height: u32) -> Vec<MipmapLevel> {
    let levels = compute_mip_levels(base_width, base_height);
    (0..levels)
        .map(|l| {
            let (w, h) = mip_dimensions(base_width, base_height, l);
            MipmapLevel { level: l, width: w, height: h }
        })
        .collect()
}

#[allow(dead_code)]
pub fn mipmap_view_to_json(cfg: &MipmapViewConfig) -> String {
    let force = cfg.force_level.map_or("null".to_string(), |l| l.to_string());
    format!(
        r#"{{"force_level":{},"show_colors":{},"max_level":{}}}"#,
        force, cfg.show_level_colors, cfg.max_level
    )
}

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

    #[test]
    fn test_default_config() {
        let c = default_mipmap_view_config();
        assert!(c.force_level.is_none());
    }

    #[test]
    fn test_compute_levels_256() {
        let levels = compute_mip_levels(256, 256);
        assert_eq!(levels, 9);
    }

    #[test]
    fn test_compute_levels_1() {
        let levels = compute_mip_levels(1, 1);
        assert_eq!(levels, 1);
    }

    #[test]
    fn test_compute_levels_zero() {
        let levels = compute_mip_levels(0, 0);
        assert_eq!(levels, 0);
    }

    #[test]
    fn test_mip_dimensions() {
        let (w, h) = mip_dimensions(256, 256, 2);
        assert_eq!(w, 64);
        assert_eq!(h, 64);
    }

    #[test]
    fn test_mip_dimensions_min() {
        let (w, h) = mip_dimensions(256, 256, 20);
        assert_eq!(w, 1);
        assert_eq!(h, 1);
    }

    #[test]
    fn test_level_color() {
        let c = level_color(0);
        assert!((c[1] - 1.0).abs() < 1e-6);
    }

    #[test]
    fn test_estimate_level() {
        assert_eq!(estimate_mip_level(1.0), 0);
        assert_eq!(estimate_mip_level(2.0), 1);
        assert_eq!(estimate_mip_level(4.0), 2);
    }

    #[test]
    fn test_total_texels() {
        let t = total_mip_texels(4, 4);
        assert!(t > 16);
    }

    #[test]
    fn test_generate_chain() {
        let chain = generate_mip_chain(64, 64);
        assert_eq!(chain.len(), 7);
        assert_eq!(chain[0].width, 64);
        assert_eq!(chain[6].width, 1);
    }
}