fovea 0.1.1

A high-precision, type-safe computer vision library guaranteeing absolute image correctness at compile time
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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186

//! Grayscale-with-alpha (MonoA) pixel types.
//!
//! Two-channel pixels: value (v) + alpha (a).

use fovea_derive::{HomogeneousPixel, LinearPixel, PlainPixel, WhiteChannel, ZeroablePixel};

use std::{
    hash::{Hash, Hasher},
    num::Saturating,
};

use super::{canonicalize_f32, canonicalize_f64};

// ═══════════════════════════════════════════════════════════════════════════════
// MonoA (Grayscale-with-Alpha) pixel types
//
// Two-channel pixels: value (v) + alpha (a).  Same derive pattern as Rgba.
// ════════════════════════════════════════════════════════════════════════════════

/// Grayscale-with-alpha pixel, 8-bit depth per channel.
#[repr(C)]
#[derive(
    Clone,
    Copy,
    Debug,
    PartialEq,
    Eq,
    Hash,
    PlainPixel,
    HomogeneousPixel,
    ZeroablePixel,
    LinearPixel,
    WhiteChannel,
)]
#[linear(accumulator = MonoAF32)]
pub struct MonoA8 {
    pub v: Saturating<u8>,
    pub a: Saturating<u8>,
}
impl MonoA8 {
    pub fn new(v: u8, a: u8) -> Self {
        MonoA8 {
            v: Saturating(v),
            a: Saturating(a),
        }
    }
}

/// Grayscale-with-alpha pixel, 16-bit depth per channel.
#[repr(C)]
#[derive(
    Clone,
    Copy,
    Debug,
    PartialEq,
    Eq,
    Hash,
    PlainPixel,
    HomogeneousPixel,
    ZeroablePixel,
    LinearPixel,
    WhiteChannel,
)]
#[linear(accumulator = MonoAF32)]
pub struct MonoA16 {
    pub v: Saturating<u16>,
    pub a: Saturating<u16>,
}
impl MonoA16 {
    pub fn new(v: u16, a: u16) -> Self {
        MonoA16 {
            v: Saturating(v),
            a: Saturating(a),
        }
    }
}

/// Grayscale-with-alpha pixel, 32-bit depth per channel.
#[repr(C)]
#[derive(
    Clone,
    Copy,
    Debug,
    PartialEq,
    Eq,
    Hash,
    PlainPixel,
    HomogeneousPixel,
    ZeroablePixel,
    LinearPixel,
    WhiteChannel,
)]
#[linear(accumulator = MonoAF64)]
pub struct MonoA32 {
    pub v: Saturating<u32>,
    pub a: Saturating<u32>,
}
impl MonoA32 {
    pub fn new(v: u32, a: u32) -> Self {
        MonoA32 {
            v: Saturating(v),
            a: Saturating(a),
        }
    }
}

/// Grayscale-with-alpha pixel, 64-bit depth per channel.
#[repr(C)]
#[derive(
    Clone,
    Copy,
    Debug,
    PartialEq,
    Eq,
    Hash,
    PlainPixel,
    HomogeneousPixel,
    ZeroablePixel,
    LinearPixel,
    WhiteChannel,
)]
#[linear(accumulator = MonoAF64)]
pub struct MonoA64 {
    pub v: Saturating<u64>,
    pub a: Saturating<u64>,
}
impl MonoA64 {
    pub fn new(v: u64, a: u64) -> Self {
        MonoA64 {
            v: Saturating(v),
            a: Saturating(a),
        }
    }
}

/// Grayscale-with-alpha pixel, 32-bit floating point depth per channel.
#[repr(C)]
#[derive(
    Clone, Copy, Debug, PartialEq, PlainPixel, HomogeneousPixel, ZeroablePixel, LinearPixel,
)]
#[linear(accumulator = Self)]
pub struct MonoAF32 {
    // Inner `f32` is a channel, not a pixel.
    #[zero(default)]
    pub v: f32,
    #[zero(default)]
    pub a: f32,
}
impl MonoAF32 {
    pub fn new(v: f32, a: f32) -> Self {
        MonoAF32 { v, a }
    }
}

impl Hash for MonoAF32 {
    fn hash<H: Hasher>(&self, state: &mut H) {
        canonicalize_f32(self.v).hash(state);
        canonicalize_f32(self.a).hash(state);
    }
}

/// Grayscale-with-alpha pixel, 64-bit floating point depth per channel.
#[repr(C)]
#[derive(
    Clone, Copy, Debug, PartialEq, PlainPixel, HomogeneousPixel, ZeroablePixel, LinearPixel,
)]
#[linear(accumulator = Self)]
pub struct MonoAF64 {
    // Inner `f64` is a channel, not a pixel.
    #[zero(default)]
    pub v: f64,
    #[zero(default)]
    pub a: f64,
}
impl MonoAF64 {
    pub fn new(v: f64, a: f64) -> Self {
        MonoAF64 { v, a }
    }
}

impl Hash for MonoAF64 {
    fn hash<H: Hasher>(&self, state: &mut H) {
        canonicalize_f64(self.v).hash(state);
        canonicalize_f64(self.a).hash(state);
    }
}