thi-ng/umbrella

import type { NumericArray } from "@thi.ng/api";
import type { IRandom } from "@thi.ng/random";
import type { Color, ColorFactory, ReadonlyColor, TypedColor } from "../api.js";
import { defColor } from "../defcolor.js";
import { rgbLab } from "../rgb/rgb-lab.js";
import { xyzLab } from "../xyz/xyz-lab.js";
import { xyzXyzD65_50 } from "../xyz/xyz-xyz.js";
import { labLabD65_50 } from "./lab-lab.js";
import { lchLab } from "./lab-lch.js";
import { labRgb } from "./lab-rgb.js";

export declare class LabD50 implements TypedColor<LabD50> {
    buf: NumericArray;
    offset: number;
    stride: number;
    l: number;
    a: number;
    b: number;
    alpha: number;
    [id: number]: number;
    readonly mode: "lab50";
    readonly length: 4;
    readonly range: [ReadonlyColor, ReadonlyColor];
    readonly xyz: [number, number, number];
    [Symbol.iterator](): Iterator<number, any, undefined>;
    clamp(): this;
    copy(): LabD50;
    copyView(): LabD50;
    deref(): Color;
    empty(): LabD50;
    eqDelta(o: LabD50, eps?: number): boolean;
    randomize(rnd?: IRandom): this;
    set(src: ReadonlyColor): this;
    toJSON(): number[];
}

export const labD50 = <ColorFactory<LabD50>>defColor({
    mode: "lab50",
    channels: {
        a: { range: [-0.7929, 0.9355] },
        b: { range: [-1.1203, 0.9339] },
    },
    order: <const>["l", "a", "b", "alpha"],
    from: {
        rgb: rgbLab,
        lch: lchLab,
        lab65: labLabD65_50,
        xyz50: xyzLab,
        xyz65: [xyzXyzD65_50, xyzLab],
    },
    toRgb: labRgb,
});