31 lines
908 B
Rust
31 lines
908 B
Rust
// 2-bit tag
|
|
pub const QOI_INDEX: u8 = 0x00; // (00)000000
|
|
pub const QOI_DIFF_8: u8 = 0x80; // (10)000000
|
|
|
|
// 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
|
|
#[allow(unused)]
|
|
pub const QOI_MASK_2: u8 = 0xc0; // (11)000000
|
|
#[allow(unused)]
|
|
pub const QOI_MASK_3: u8 = 0xe0; // (111)00000
|
|
#[allow(unused)]
|
|
pub const QOI_MASK_4: u8 = 0xf0; // (1111)0000
|
|
|
|
pub const QOI_HEADER_SIZE: usize = 14;
|
|
|
|
pub const QOI_PADDING: [u8; 8] = [0, 0, 0, 0, 0, 0, 0, 0x01]; // 7 zeros and one 0x01 marker
|
|
pub const QOI_PADDING_SIZE: usize = 8;
|
|
|
|
pub const QOI_MAGIC: u32 =
|
|
(b'q' as u32) << 24 | (b'o' as u32) << 16 | (b'i' as u32) << 8 | (b'f' as u32);
|
|
|
|
pub const QOI_PIXELS_MAX: usize = 400_000_000;
|