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//! Sources of colors.
use super::Rgb8;
use image::RgbImage;
/// A source of colors in multidimensional space.
pub trait ColorSource {
/// Get the size of each dimension in this space.
fn dimensions(&self) -> &[usize];
/// Get the color at some particular coordinates.
fn get_color(&self, coords: &[usize]) -> Rgb8;
}
/// The entire RGB space.
#[derive(Debug)]
pub struct AllColors {
dims: [usize; 3],
shifts: [u32; 3],
}
impl AllColors {
/// Create an AllColors source with the given bit depths.
pub fn new(r: u32, g: u32, b: u32) -> Self {
Self {
dims: [1 << r, 1 << g, 1 << b],
shifts: [8 - r, 8 - g, 8 - b],
}
}
}
impl ColorSource for AllColors {
fn dimensions(&self) -> &[usize] {
&self.dims
}
fn get_color(&self, coords: &[usize]) -> Rgb8 {
Rgb8::from([
(coords[0] << self.shifts[0]) as u8,
(coords[1] << self.shifts[1]) as u8,
(coords[2] << self.shifts[2]) as u8,
])
}
}
/// Colors extracted from an image.
#[derive(Debug)]
pub struct ImageColors {
dims: [usize; 2],
image: RgbImage,
}
impl From<RgbImage> for ImageColors {
fn from(image: RgbImage) -> Self {
Self {
dims: [image.width() as usize, image.height() as usize],
image,
}
}
}
impl ColorSource for ImageColors {
fn dimensions(&self) -> &[usize] {
&self.dims
}
fn get_color(&self, coords: &[usize]) -> Rgb8 {
*self.image.get_pixel(coords[0] as u32, coords[1] as u32)
}
}
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