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use crate::coords::Coord;
use image::imageops::colorops::ColorMap;
use image::Rgba;
use std::f32;
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum PaletteColor {
Black,
Grey,
White,
DarkBrown,
Brown,
LightBrown,
DarkRed,
Red,
Pink,
Orange,
DarkYellow,
Yellow,
DarkGreen,
Green,
LightGreen,
DarkBlue,
Blue,
LightBlue,
DarkIndigo,
Indigo,
LightIndigo,
DarkViolet,
Violet,
LightViolet,
}
#[derive(Default)]
pub struct Palette {
pub colormap: Vec<PaletteColor>,
}
impl PaletteColor {
pub fn get_row_col(&self) -> Coord {
Coord::from(match *self {
PaletteColor::Black => (0, 0),
PaletteColor::Grey => (0, 1),
PaletteColor::White => (0, 2),
PaletteColor::DarkBrown => (1, 0),
PaletteColor::Brown => (1, 1),
PaletteColor::LightBrown => (1, 2),
PaletteColor::DarkRed => (2, 0),
PaletteColor::Red => (2, 1),
PaletteColor::Pink => (2, 2),
PaletteColor::Orange => (3, 0),
PaletteColor::DarkYellow => (3, 1),
PaletteColor::Yellow => (3, 2),
PaletteColor::DarkGreen => (4, 0),
PaletteColor::Green => (4, 1),
PaletteColor::LightGreen => (4, 2),
PaletteColor::DarkBlue => (5, 0),
PaletteColor::Blue => (5, 1),
PaletteColor::LightBlue => (5, 2),
PaletteColor::DarkIndigo => (6, 0),
PaletteColor::Indigo => (6, 1),
PaletteColor::LightIndigo => (6, 2),
PaletteColor::DarkViolet => (7, 0),
PaletteColor::Violet => (7, 1),
PaletteColor::LightViolet => (7, 2),
})
}
pub fn get_rgba(&self) -> Rgba<u8> {
let data = match *self {
PaletteColor::Black => [0x0d, 0x0d, 0x0d, 0xff],
PaletteColor::Grey => [0x76, 0x76, 0x76, 0xff],
PaletteColor::White => [0xe5, 0xe5, 0xe5, 0xff],
PaletteColor::DarkBrown => [0x62, 0x32, 0x00, 0xff],
PaletteColor::Brown => [0xb9, 0x7a, 0x56, 0xff],
PaletteColor::LightBrown => [0xef, 0xe4, 0xb0, 0xff],
PaletteColor::DarkRed => [0x7e, 0x0d, 0x0d, 0xff],
PaletteColor::Red => [0xed, 0x1c, 0x22, 0xff],
PaletteColor::Pink => [0xff, 0xae, 0xc9, 0xff],
PaletteColor::Orange => [0xff, 0x7f, 0x26, 0xff],
PaletteColor::DarkYellow => [0xff, 0xc9, 0x0d, 0xff],
PaletteColor::Yellow => [0xfa, 0xed, 0x16, 0xff],
PaletteColor::DarkGreen => [0x26, 0x5d, 0x38, 0xff],
PaletteColor::Green => [0x35, 0xab, 0x55, 0xff],
PaletteColor::LightGreen => [0xb5, 0xe6, 0x1c, 0xff],
PaletteColor::DarkBlue => [0x00, 0x65, 0x91, 0xff],
PaletteColor::Blue => [0x00, 0xa2, 0xe8, 0xff],
PaletteColor::LightBlue => [0x99, 0xd9, 0xea, 0xff],
PaletteColor::DarkIndigo => [0x1c, 0x22, 0x63, 0xff],
PaletteColor::Indigo => [0x30, 0x39, 0xcc, 0xff],
PaletteColor::LightIndigo => [0x70, 0x92, 0xbe, 0xff],
PaletteColor::DarkViolet => [0x95, 0x35, 0x96, 0xff],
PaletteColor::Violet => [0xd5, 0x5f, 0xd7, 0xff],
PaletteColor::LightViolet => [0xc1, 0xa7, 0xd7, 0xff],
};
Rgba(data)
}
}
impl Palette {
pub fn new() -> Palette {
let colors = vec![
PaletteColor::Black,
PaletteColor::Grey,
PaletteColor::White,
PaletteColor::DarkBrown,
PaletteColor::Brown,
PaletteColor::LightBrown,
PaletteColor::DarkRed,
PaletteColor::Red,
PaletteColor::Pink,
PaletteColor::Orange,
PaletteColor::DarkYellow,
PaletteColor::Yellow,
PaletteColor::DarkGreen,
PaletteColor::Green,
PaletteColor::LightGreen,
PaletteColor::DarkBlue,
PaletteColor::Blue,
PaletteColor::LightBlue,
PaletteColor::DarkIndigo,
PaletteColor::Indigo,
PaletteColor::LightIndigo,
PaletteColor::DarkViolet,
PaletteColor::Violet,
PaletteColor::LightViolet,
];
Palette { colormap: colors }
}
fn get_closest_color(&self, color: &Rgba<u8>) -> (usize, Rgba<u8>) {
let r = f32::from(color[0]);
let g = f32::from(color[1]);
let b = f32::from(color[2]);
let a = f32::from(color[3]);
let mut index = 0;
let mut closest_color = PaletteColor::Black;
let mut color_dist = f32::MAX;
for (ix, col) in self.colormap.iter().enumerate() {
let hex = col.get_rgba();
let col_r = f32::from(hex[0]);
let col_g = f32::from(hex[1]);
let col_b = f32::from(hex[2]);
let col_a = f32::from(hex[3]);
let col_r_diff = (col_r - r).powi(2).max((col_r - r + col_a - a).powi(2));
let col_g_diff = (col_g - g).powi(2).max((col_g - g + col_a - a).powi(2));
let col_b_diff = (col_b - b).powi(2).max((col_b - b + col_a - a).powi(2));
let curr_color_dist = (col_r_diff + col_g_diff + col_b_diff).sqrt();
if curr_color_dist < color_dist {
index = ix;
closest_color = *col;
color_dist = curr_color_dist;
}
}
(index, closest_color.get_rgba())
}
}
impl ColorMap for Palette {
type Color = Rgba<u8>;
fn map_color(&self, color: &mut Self::Color) {
let (_, closest_rgba) = self.get_closest_color(color);
color.0[0] = closest_rgba[0];
color.0[1] = closest_rgba[1];
color.0[2] = closest_rgba[2];
color.0[3] = closest_rgba[3];
}
fn index_of(&self, color: &Self::Color) -> usize {
let (index, _) = self.get_closest_color(color);
index
}
}
