hashavatar 1.1.0

Stable deterministic procedural avatars in Rust with configurable identity hashing, WebP, optional PNG/JPEG/GIF, and SVG export
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

use super::*;

pub fn render_robot_avatar_for_identity(
    spec: AvatarSpec,
    identity: &AvatarIdentity,
    background: AvatarBackground,
) -> Result<RgbaImage, AvatarSpecError> {
    spec.validate()?;

    let width = spec.width as i32;
    let height = spec.height as i32;
    let mut image =
        ImageBuffer::from_pixel(spec.width, spec.height, Color::rgb(255, 255, 255).into());
    let center_x = width / 2;
    let center_y = (height as f32 * 0.56) as i32;
    let bg = hsl_to_color(
        210.0 + identity.unit_f32(0) * 70.0,
        0.18 + identity.unit_f32(1) * 0.18,
        0.92,
    );
    let accent = hsl_to_color(160.0 + identity.unit_f32(2) * 120.0, 0.48, 0.62);
    let metal = hsl_to_color(200.0 + identity.unit_f32(3) * 28.0, 0.16, 0.74);
    let trim = hsl_to_color(205.0 + identity.unit_f32(4) * 22.0, 0.18, 0.46);
    let light = hsl_to_color(50.0 + identity.unit_f32(5) * 120.0, 0.84, 0.66);
    let dark = Color::rgb(47, 60, 72);
    let bg_fill = background_fill(background, bg);
    image.pixels_mut().for_each(|pixel| *pixel = bg_fill.into());

    let head_w = (width as f32 * (0.44 + identity.unit_f32(6) * 0.12)) as i32;
    let head_h = (height as f32 * (0.34 + identity.unit_f32(7) * 0.10)) as i32;
    let head_x = center_x - head_w / 2;
    let head_y = center_y - head_h / 2;
    draw_background_accent(
        &mut image,
        center_x,
        center_y,
        head_w / 2,
        head_h / 2,
        accent,
        0.5,
        background,
        identity,
    );

    draw_filled_rect_mut(
        &mut image,
        Rect::at(head_x, head_y).of_size(head_w as u32, head_h as u32),
        metal.into(),
    );
    draw_line_segment_mut(
        &mut image,
        (head_x as f32, head_y as f32),
        ((head_x + head_w) as f32, head_y as f32),
        trim.into(),
    );
    draw_line_segment_mut(
        &mut image,
        (head_x as f32, (head_y + head_h) as f32),
        ((head_x + head_w) as f32, (head_y + head_h) as f32),
        trim.into(),
    );
    draw_line_segment_mut(
        &mut image,
        (head_x as f32, head_y as f32),
        (head_x as f32, (head_y + head_h) as f32),
        trim.into(),
    );
    draw_line_segment_mut(
        &mut image,
        ((head_x + head_w) as f32, head_y as f32),
        ((head_x + head_w) as f32, (head_y + head_h) as f32),
        trim.into(),
    );

    let antenna_h = (height as f32 * 0.10) as i32;
    draw_line_segment_mut(
        &mut image,
        (center_x as f32, (head_y - antenna_h / 2) as f32),
        (center_x as f32, head_y as f32),
        dark.into(),
    );
    draw_filled_circle_mut(
        &mut image,
        (center_x, head_y - antenna_h / 2),
        (head_w as f32 * 0.05) as i32,
        accent.into(),
    );

    let eye_y = center_y - head_h / 6;
    let eye_offset = head_w / 4;
    let eye_rx = (head_w as f32 * 0.12) as i32;
    let eye_ry = (head_h as f32 * 0.10) as i32;
    for x in [center_x - eye_offset, center_x + eye_offset] {
        draw_filled_ellipse_mut(&mut image, (x, eye_y), eye_rx, eye_ry, light.into());
        if identity.byte(8).is_multiple_of(2) {
            draw_filled_circle_mut(
                &mut image,
                (x, eye_y),
                (eye_rx as f32 * 0.35) as i32,
                dark.into(),
            );
        }
    }

    let mouth_y = center_y + head_h / 5;
    let mouth_w = (head_w as f32 * 0.42) as i32;
    let mouth_h = (head_h as f32 * 0.12) as i32;
    draw_filled_rect_mut(
        &mut image,
        Rect::at(center_x - mouth_w / 2, mouth_y - mouth_h / 2)
            .of_size(mouth_w as u32, mouth_h as u32),
        dark.into(),
    );
    let teeth = 4 + (identity.byte(9) % 4) as i32;
    for idx in 1..teeth {
        let x = center_x - mouth_w / 2 + idx * mouth_w / teeth;
        draw_line_segment_mut(
            &mut image,
            (x as f32, (mouth_y - mouth_h / 2) as f32),
            (x as f32, (mouth_y + mouth_h / 2) as f32),
            metal.into(),
        );
    }

    let bolt_y = center_y;
    draw_filled_circle_mut(
        &mut image,
        (head_x + head_w / 8, bolt_y),
        (head_w as f32 * 0.035) as i32,
        trim.into(),
    );
    draw_filled_circle_mut(
        &mut image,
        (head_x + head_w - head_w / 8, bolt_y),
        (head_w as f32 * 0.035) as i32,
        trim.into(),
    );
    Ok(image)
}