@tbela99/css-parser/dist/lib/renderer/color/prophotoRgb.js

CSS parser for node and the browser

import { srgb2xyz } from './xyz.js';
import { XYZ_D65_to_D50, xyzd502srgb } from './xyzd50.js';

function prophotorgb2srgbvalues(r, g, b, a = null) {
    // @ts-ignore
    return xyzd502srgb(...prophotorgb2xyz50(r, g, b, a));
}
function srgb2prophotorgbvalues(r, g, b, a) {
    // @ts-ignore
    return xyz50_to_prophotorgb(...XYZ_D65_to_D50(...srgb2xyz(r, g, b, a)));
}
function prophotorgb2lin_ProPhoto(r, g, b, a = null) {
    return [r, g, b].map(v => {
        let abs = Math.abs(v);
        if (abs >= 16 / 512) {
            return Math.sign(v) * Math.pow(abs, 1.8);
        }
        return v / 16;
    }).concat(a == null || a == 1 ? [] : [a]);
}
function prophotorgb2xyz50(r, g, b, a = null) {
    [r, g, b, a] = prophotorgb2lin_ProPhoto(r, g, b, a);
    const xyz = [
        0.7977666449006423 * r +
            0.1351812974005331 * g +
            0.0313477341283922 * b,
        0.2880748288194013 * r +
            0.7118352342418731 * g +
            0.0000899369387256 * b,
        0.8251046025104602 * b
    ];
    return xyz.concat(a == null || a == 1 ? [] : [a]);
}
function xyz50_to_prophotorgb(x, y, z, a) {
    // @ts-ignore
    return gam_prophotorgb(...[
        x * 1.3457868816471585 -
            y * 0.2555720873797946 -
            0.0511018649755453 * z,
        x * -0.5446307051249019 +
            y * 1.5082477428451466 +
            0.0205274474364214 * z,
        1.2119675456389452 * z
    ].concat(a == null || a == 1 ? [] : [a]));
}
function gam_prophotorgb(r, g, b, a) {
    return [r, g, b].map(v => {
        let abs = Math.abs(v);
        if (abs >= 1 / 512) {
            return Math.sign(v) * Math.pow(abs, 1 / 1.8);
        }
        return 16 * v;
    }).concat(a == null || a == 1 ? [] : [a]);
}

export { prophotorgb2srgbvalues, srgb2prophotorgbvalues };