texture2ddecoder 0.1.2

pure Rust no-std texture decoder
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

pub(crate) static WRITE_ORDER_TABLE: [usize; 16] =
    [0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15];
pub(crate) static WRITE_ORDER_TABLE_REV: [usize; 16] =
    [15, 11, 7, 3, 14, 10, 6, 2, 13, 9, 5, 1, 12, 8, 4, 0];
pub(crate) static ETC1_MODIFIER_TABLE: [[i16; 2]; 8] = [
    [2, 8],
    [5, 17],
    [9, 29],
    [13, 42],
    [18, 60],
    [24, 80],
    [33, 106],
    [47, 183],
];
pub(crate) static ETC2A_MODIFIER_TABLE: [[[i16; 2]; 8]; 2] = [
    [
        [0, 8],
        [0, 17],
        [0, 29],
        [0, 42],
        [0, 60],
        [0, 80],
        [0, 106],
        [0, 183],
    ],
    [
        [2, 8],
        [5, 17],
        [9, 29],
        [13, 42],
        [18, 60],
        [24, 80],
        [33, 106],
        [47, 183],
    ],
];
pub(crate) static ETC1_SUBBLOCK_TABLE: [[usize; 16]; 2] = [
    [0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1],
    [0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1],
];
pub(crate) static ETC2_DISTANCE_TABLE: [i16; 8] = [3, 6, 11, 16, 23, 32, 41, 64];
pub(crate) static ETC2_ALPHA_MOD_TABLE: [[i8; 8]; 16] = [
    [-3, -6, -9, -15, 2, 5, 8, 14],
    [-3, -7, -10, -13, 2, 6, 9, 12],
    [-2, -5, -8, -13, 1, 4, 7, 12],
    [-2, -4, -6, -13, 1, 3, 5, 12],
    [-3, -6, -8, -12, 2, 5, 7, 11],
    [-3, -7, -9, -11, 2, 6, 8, 10],
    [-4, -7, -8, -11, 3, 6, 7, 10],
    [-3, -5, -8, -11, 2, 4, 7, 10],
    [-2, -6, -8, -10, 1, 5, 7, 9],
    [-2, -5, -8, -10, 1, 4, 7, 9],
    [-2, -4, -8, -10, 1, 3, 7, 9],
    [-2, -5, -7, -10, 1, 4, 6, 9],
    [-3, -4, -7, -10, 2, 3, 6, 9],
    [-1, -2, -3, -10, 0, 1, 2, 9],
    [-4, -6, -8, -9, 3, 5, 7, 8],
    [-3, -5, -7, -9, 2, 4, 6, 8],
];