use std::ops::Add;
use std::ops::AddAssign;
use std::ops::Div;
use std::ops::DivAssign;
use std::ops::Mul;
use std::ops::MulAssign;
use std::ops::Rem;
use std::ops::Sub;
use std::ops::SubAssign;
pub type Color = Colour;
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct Colour {
rgba: u32,
}
impl Colour {
pub const WHITE: Colour = Colour::new_from_rgba(0xffffffff);
pub const BLACK: Colour = Colour::new_from_rgba(0x000000ff);
pub const MAGENTA: Colour = Colour::new_from_rgba(0xff00ffff);
pub const CYAN: Colour = Colour::new_from_rgba(0x00ffffff);
pub const YELLOW: Colour = Colour::new_from_rgba(0xffff00ff);
#[inline(always)]
fn hex_u32_to_f32(val: u32, shift: u32) -> f32 {
((val >> shift) & 0xff) as f32 / 255.0
}
#[inline(always)]
fn hex_u32_to_u32(val: u32, shift: u32) -> u32 {
(val >> shift) & 0xff
}
#[inline(always)]
fn hex_u32_to_u8(val: u32, shift: u32) -> u8 {
((val >> shift) & 0xff) as u8
}
#[inline(always)]
fn f32_to_hex_u32(val: f32, shift: u8) -> u32 {
((val * 255.0).round() as u32) << shift
}
fn clamp_u8_to_f32(val: u8) -> f32 {
if val >= 255 {
1.0
} else if val == 0 {
0.0
} else {
(val as f32) / 255.0
}
}
fn f32_to_rgba_u8(val: f32) -> u8 {
if val >= 1.0 {
255
} else if val <= 0.0 {
0
} else {
(val * 255.0) as u8
}
}
fn f32_to_rgba_u32(val: f32) -> u32 {
if val >= 1.0 {
255
} else if val <= 0.0 {
0
} else {
(val * 255.0) as u32
}
}
const fn rgba_u32s_to_rgba_hex(red: u32, green: u32, blue: u32, alpha: u32) -> u32 {
(red << 24) | (green << 16) | (blue << 8) | alpha
}
const fn rgba_u8s_to_rgba_hex(red: u8, green: u8, blue: u8, alpha: u8) -> u32 {
((red as u32) << 24) | ((green as u32) << 16) | ((blue as u32) << 8) | (alpha as u32)
}
pub fn new_from_f32s(red: f32, green: f32, blue: f32, alpha: f32) -> Self {
let red = Colour::f32_to_rgba_u32(red);
let green = Colour::f32_to_rgba_u32(green);
let blue = Colour::f32_to_rgba_u32(blue);
let alpha = Colour::f32_to_rgba_u32(alpha);
Self {
rgba: Colour::rgba_u32s_to_rgba_hex(red, green, blue, alpha),
}
}
pub const fn new_from_u32s(red: u32, green: u32, blue: u32, alpha: u32) -> Self {
Self {
rgba: Colour::rgba_u32s_to_rgba_hex(red, green, blue, alpha),
}
}
pub const fn new_from_u8s(red: u8, green: u8, blue: u8, alpha: u8) -> Self {
Self {
rgba: Colour::rgba_u8s_to_rgba_hex(red, green, blue, alpha),
}
}
pub const fn new_from_rgba(rgba: u32) -> Self {
Self { rgba }
}
pub fn red_f32(&self) -> f32 {
Colour::hex_u32_to_f32(self.rgba, 24)
}
pub fn red_u32(&self) -> u32 {
Colour::hex_u32_to_u32(self.rgba, 24)
}
pub fn red_u8(&self) -> u8 {
Colour::hex_u32_to_u8(self.rgba, 24)
}
pub fn green_f32(&self) -> f32 {
Colour::hex_u32_to_f32(self.rgba, 16)
}
pub fn green_u32(&self) -> u32 {
Colour::hex_u32_to_u32(self.rgba, 16)
}
pub fn green_u8(&self) -> u8 {
Colour::hex_u32_to_u8(self.rgba, 16)
}
pub fn blue_f32(&self) -> f32 {
Colour::hex_u32_to_f32(self.rgba, 8)
}
pub fn blue_u32(&self) -> u32 {
Colour::hex_u32_to_u32(self.rgba, 8)
}
pub fn blue_u8(&self) -> u8 {
Colour::hex_u32_to_u8(self.rgba, 8)
}
pub fn alpha_f32(&self) -> f32 {
Colour::hex_u32_to_f32(self.rgba, 0)
}
pub fn alpha_u32(&self) -> u32 {
Colour::hex_u32_to_u32(self.rgba, 0)
}
pub fn alpha_u8(&self) -> u8 {
Colour::hex_u32_to_u8(self.rgba, 0)
}
pub fn mix(self, other: Self, mut amount: f32) -> Self {
amount = amount.max(0.0).min(1.0);
let inverse_amount = 1.0 - amount;
(self * inverse_amount) + (other * amount)
}
pub fn mix_no_alpha(self, other: Self, mut amount: f32) -> Self {
amount = amount.max(0.0).min(1.0);
let inverse_amount = 1.0 - amount;
let mut result = (self * inverse_amount) + (other * amount);
result.rgba = (result.rgba & 0xffffff00) | self.alpha_u32();
result
}
#[inline(always)]
pub fn to_rgba_u32(self) -> u32 {
self.rgba
}
}
impl Add<Self> for Colour {
type Output = Self;
fn add(self, other: Self) -> Self {
Self::new_from_f32s(
self.red_f32() + other.red_f32(),
self.green_f32() + other.green_f32(),
self.blue_f32() + other.blue_f32(),
self.alpha_f32() + other.alpha_f32(),
)
}
}
impl AddAssign<Self> for Colour {
fn add_assign(&mut self, other: Self) {
*self = *self + other;
}
}
impl Sub<Self> for Colour {
type Output = Self;
fn sub(self, other: Self) -> Self {
Self::new_from_f32s(
self.red_f32() - other.red_f32(),
self.green_f32() - other.green_f32(),
self.blue_f32() - other.blue_f32(),
self.alpha_f32() - other.alpha_f32(),
)
}
}
impl SubAssign<Self> for Colour {
fn sub_assign(&mut self, other: Self) {
*self = *self - other;
}
}
impl Mul<Self> for Colour {
type Output = Self;
fn mul(self, other: Self) -> Self {
Self::new_from_f32s(
self.red_f32() * other.red_f32(),
self.green_f32() * other.green_f32(),
self.blue_f32() * other.blue_f32(),
self.alpha_f32() * other.alpha_f32(),
)
}
}
impl MulAssign<Self> for Colour {
fn mul_assign(&mut self, other: Self) {
*self = *self * other;
}
}
impl Div<Self> for Colour {
type Output = Self;
fn div(self, other: Self) -> Self {
Self::new_from_f32s(
self.red_f32() / other.red_f32(),
self.green_f32() / other.green_f32(),
self.blue_f32() / other.blue_f32(),
self.alpha_f32() / other.alpha_f32(),
)
}
}
impl DivAssign<Self> for Colour {
fn div_assign(&mut self, other: Self) {
*self = *self / other;
}
}
impl Rem<Self> for Colour {
type Output = Self;
fn rem(self, other: Self) -> Self {
Self::new_from_f32s(
self.red_f32() % other.red_f32(),
self.green_f32() % other.green_f32(),
self.blue_f32() % other.blue_f32(),
self.alpha_f32() % other.alpha_f32(),
)
}
}
impl Mul<f32> for Colour {
type Output = Self;
fn mul(self, val: f32) -> Self {
Self::new_from_f32s(
self.red_f32() * val,
self.green_f32() * val,
self.blue_f32() * val,
self.alpha_f32() * val,
)
}
}
impl MulAssign<f32> for Colour {
fn mul_assign(&mut self, val: f32) {
*self = *self * val;
}
}
impl Div<f32> for Colour {
type Output = Self;
fn div(self, val: f32) -> Self {
Self::new_from_f32s(
self.red_f32() / val,
self.green_f32() / val,
self.blue_f32() / val,
self.alpha_f32() / val,
)
}
}
impl DivAssign<f32> for Colour {
fn div_assign(&mut self, val: f32) {
*self = *self / val;
}
}
#[cfg(test)]
mod red_xx {
use super::*;
#[test]
pub fn it_should_return_red_given() {
let rgba_hex = 0xffa89321;
let colour = Colour::new_from_rgba(rgba_hex);
assert_eq!(colour.red_f32(), 1.0);
assert_eq!(colour.red_u32(), 255);
assert_eq!(colour.red_u8(), 255);
}
}
#[cfg(test)]
mod green_xx {
use super::*;
#[test]
pub fn it_should_return_green_given() {
let rgba_hex = 0xffa89321;
let colour = Colour::new_from_rgba(rgba_hex);
assert_eq!(colour.green_f32(), 168.0 / 255.0);
assert_eq!(colour.green_u32(), 168);
assert_eq!(colour.green_u8(), 168);
}
}
#[cfg(test)]
mod blue_xx {
use super::*;
#[test]
pub fn it_should_return_blue_given() {
let rgba_hex = 0xffa89321;
let colour = Colour::new_from_rgba(rgba_hex);
assert_eq!(colour.blue_f32(), 147.0 / 255.0);
assert_eq!(colour.blue_u32(), 147);
assert_eq!(colour.blue_u8(), 147);
}
}
#[cfg(test)]
mod alpha_xx {
use super::*;
#[test]
pub fn it_should_return_alpha_given() {
let rgba_hex = 0xffa89321;
let colour = Colour::new_from_rgba(rgba_hex);
assert_eq!(colour.alpha_f32(), 33.0 / 255.0);
assert_eq!(colour.alpha_u32(), 33);
assert_eq!(colour.alpha_u8(), 33);
}
}
#[cfg(test)]
mod new_rgba_hex {
use super::*;
#[test]
pub fn it_should_have_components_match_those_given() {
let rgba_hex = 0xffa89321;
let colour = Colour::new_from_rgba(rgba_hex);
assert_eq!(colour.red_u32(), 255);
assert_eq!(colour.green_u32(), 168);
assert_eq!(colour.blue_u32(), 147);
assert_eq!(colour.alpha_u32(), 33);
assert_eq!(colour.to_rgba_u32(), rgba_hex);
}
}