molstar
Version:
A comprehensive macromolecular library.
106 lines • 3.16 kB
JavaScript
;
/**
* Copyright (c) 2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
*
* Color conversion code adapted from chroma.js (https://github.com/gka/chroma.js)
* Copyright (c) 2011-2018, Gregor Aisch, BSD license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.Hcl = void 0;
var misc_1 = require("../../../mol-math/misc");
var lab_1 = require("./lab");
/**
* CIE HCL (Hue-Chroma-Luminance) color
*
* - H [0..360]
* - C [0..100]
* - L [0..100]
*
* Cylindrical representation of CIELUV (see https://en.wikipedia.org/wiki/CIELUV)
*/
function Hcl() {
return Hcl.zero();
}
exports.Hcl = Hcl;
(function (Hcl) {
function zero() {
var out = [0.1, 0.0, 0.0];
out[0] = 0;
return out;
}
Hcl.zero = zero;
function create(h, c, l) {
var out = zero();
out[0] = h;
out[1] = c;
out[2] = l;
return out;
}
Hcl.create = create;
var tmpFromColorLab = [0, 0, 0];
function fromColor(out, color) {
return lab_1.Lab.toHcl(out, lab_1.Lab.fromColor(tmpFromColorLab, color));
}
Hcl.fromColor = fromColor;
function fromLab(hcl, lab) {
return lab_1.Lab.toHcl(hcl, lab);
}
Hcl.fromLab = fromLab;
var tmpToColorLab = [0, 0, 0];
function toColor(hcl) {
return lab_1.Lab.toColor(toLab(tmpToColorLab, hcl));
}
Hcl.toColor = toColor;
/**
* Convert from a qualitative parameter h and a quantitative parameter l to a 24-bit pixel.
*
* These formulas were invented by David Dalrymple to obtain maximum contrast without going
* out of gamut if the parameters are in the range 0-1.
* A saturation multiplier was added by Gregor Aisch
*/
function toLab(out, hcl) {
var h = hcl[0], c = hcl[1], l = hcl[2];
if (isNaN(h))
h = 0;
h = (0, misc_1.degToRad)(h);
out[0] = l;
out[1] = Math.cos(h) * c;
out[2] = Math.sin(h) * c;
return out;
}
Hcl.toLab = toLab;
function copy(out, c) {
out[0] = c[0];
out[1] = c[1];
out[2] = c[2];
return out;
}
Hcl.copy = copy;
function saturate(out, c, amount) {
out[0] = c[0];
out[1] = Math.max(0, c[1] + Kn * amount);
out[2] = c[2];
return out;
}
Hcl.saturate = saturate;
function desaturate(out, c, amount) {
return saturate(out, c, -amount);
}
Hcl.desaturate = desaturate;
var tmpDarkenLab = [0, 0, 0];
function darken(out, c, amount) {
toLab(tmpDarkenLab, c);
return lab_1.Lab.toHcl(out, lab_1.Lab.darken(tmpDarkenLab, tmpDarkenLab, amount));
}
Hcl.darken = darken;
function lighten(out, c, amount) {
return darken(out, c, -amount);
}
Hcl.lighten = lighten;
// Corresponds roughly to RGB brighter/darker
var Kn = 18;
})(Hcl || (Hcl = {}));
exports.Hcl = Hcl;
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