forked from AbleOS/ableos
68 lines
1.5 KiB
Rust
68 lines
1.5 KiB
Rust
use core::ops::{BitAnd, BitOr, Shr};
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pub type Rgba64 = u64;
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pub enum ChannelValue {
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Dark,
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Low,
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Mid,
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High,
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}
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impl From<u8> for ChannelValue {
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fn from(b: u8) -> Self {
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use ChannelValue::*;
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match b {
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0x00..=0x3f => Dark,
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0x40..=0x7f => Low,
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0x80..=0xbf => Mid,
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0xc0..=0xff => High,
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}
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}
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}
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pub fn get_r(rgba: Rgba64) -> u8 {
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rgba.bitand(0xff_00_00_00).shr(0o30) as u8
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}
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pub fn get_g(rgba: Rgba64) -> u8 {
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rgba.bitand(0xff_00_00).shr(0o20) as u8
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}
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pub fn get_b(rgba: Rgba64) -> u8 {
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rgba.bitand(0xff_00).shr(0o10) as u8
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}
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pub fn get_a(rgba: Rgba64) -> u8 {
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(rgba & 0xff) as u8
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}
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pub fn set_r(rgba: Rgba64, r: u8) -> Rgba64 {
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rgba.bitand(0xffffffff_00_ff_ff_ff)
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.bitor((r as Rgba64).shr(0o30))
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}
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pub fn set_g(rgba: Rgba64, g: u8) -> Rgba64 {
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rgba.bitand(0xffffffff_ff_00_ff_ff)
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.bitor((g as Rgba64).shr(0o20))
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}
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pub fn set_b(rgba: Rgba64, b: u8) -> Rgba64 {
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rgba.bitand(0xffffffff_ff_ff_00_ff)
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.bitor((b as Rgba64).shr(0o10))
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}
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pub fn set_a(rgba: Rgba64, a: u8) -> Rgba64 {
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rgba.bitand(0xffffffff_ff_ff_ff_00).bitor(a as Rgba64)
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}
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pub fn rgba_div(a: Rgba64, b: Rgba64) -> Rgba64 {
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set_r(0, get_r(a) / get_r(b))
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| set_g(0, get_g(a) / get_g(b))
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| set_g(0, get_b(a) / get_b(b))
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| set_g(0, get_a(a) / get_a(b))
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}
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pub fn new_rgba64(r: u8, g: u8, b: u8, a: u8) -> Rgba64 {
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set_r(0, r) | set_g(0, g) | set_b(0, b) | set_a(0, a)
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}
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