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
|
//! Sources of colors.
use super::Rgb8;
use image::RgbImage;
/// A source of colors in multidimensional space.
pub trait ColorSource {
/// Get the size of each dimension in this space.
fn dimensions(&self) -> &[usize];
/// Get the color at some particular coordinates.
fn get_color(&self, coords: &[usize]) -> Rgb8;
}
/// The entire RGB space.
#[derive(Debug)]
pub struct AllColors {
dims: [usize; 3],
shifts: [usize; 3],
}
impl AllColors {
/// Create an AllColors source with the given bit depth.
pub fn new(bits: usize) -> Self {
// Allocate bits from most to least perceptually important
let gbits = (bits + 2) / 3;
let rbits = (bits + 1) / 3;
let bbits = bits / 3;
Self {
dims: [1 << rbits, 1 << gbits, 1 << bbits],
shifts: [8 - rbits, 8 - gbits, 8 - bbits],
}
}
}
impl ColorSource for AllColors {
fn dimensions(&self) -> &[usize] {
&self.dims
}
fn get_color(&self, coords: &[usize]) -> Rgb8 {
Rgb8::from([
(coords[0] << self.shifts[0]) as u8,
(coords[1] << self.shifts[1]) as u8,
(coords[2] << self.shifts[2]) as u8,
])
}
}
/// Colors extracted from an image.
#[derive(Debug)]
pub struct ImageColors {
dims: [usize; 2],
image: RgbImage,
}
impl From<RgbImage> for ImageColors {
fn from(image: RgbImage) -> Self {
Self {
dims: [image.width() as usize, image.height() as usize],
image: image,
}
}
}
impl ColorSource for ImageColors {
fn dimensions(&self) -> &[usize] {
&self.dims
}
fn get_color(&self, coords: &[usize]) -> Rgb8 {
*self.image.get_pixel(coords[0] as u32, coords[1] as u32)
}
}
|
