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Add mask comments to consts module

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Ivan Smirnov 2021-11-29 13:58:11 +00:00
parent 899270e42e
commit 3dc0d6adab
1 changed files with 16 additions and 10 deletions
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26
src/consts.rs
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@ -1,14 +1,20 @@
pub const QOI_INDEX: u8 = 0x00;
pub const QOI_RUN_8: u8 = 0x40;
pub const QOI_RUN_16: u8 = 0x60;
pub const QOI_DIFF_8: u8 = 0x80;
pub const QOI_DIFF_16: u8 = 0xc0;
pub const QOI_DIFF_24: u8 = 0xe0;
pub const QOI_COLOR: u8 = 0xf0;
// 2-bit tag
pub const QOI_INDEX: u8 = 0x00; // (00)000000
pub const QOI_DIFF_8: u8 = 0x80; // (10)000000
pub const QOI_MASK_2: u8 = 0xc0;
pub const QOI_MASK_3: u8 = 0xe0;
pub const QOI_MASK_4: u8 = 0xf0;
// 3-bit tag
pub const QOI_RUN_8: u8 = 0x40; // (010)00000
pub const QOI_RUN_16: u8 = 0x60; // (011)00000
pub const QOI_DIFF_16: u8 = 0xc0; // (110)00000
// 4-bit tag
pub const QOI_DIFF_24: u8 = 0xe0; // (1110)0000
pub const QOI_COLOR: u8 = 0xf0; // (1111)0000
// tag masks
pub const QOI_MASK_2: u8 = 0xc0; // (11)000000
pub const QOI_MASK_3: u8 = 0xe0; // (111)00000
pub const QOI_MASK_4: u8 = 0xf0; // (1111)0000
pub const QOI_HEADER_SIZE: usize = 14;
pub const QOI_PADDING: usize = 4;