mirror of
https://github.com/nunocoracao/blowfish.git
synced 2025-04-24 08:51:53 +02:00
23 lines
1 KiB
JavaScript
23 lines
1 KiB
JavaScript
|
/* IMPORT */
|
||
|
|
import Color from '../color/index.js';
|
||
|
|
import rgba from './rgba.js';
|
||
|
|
/* MAIN */
|
||
|
|
//SOURCE: https://github.com/sass/dart-sass/blob/7457d2e9e7e623d9844ffd037a070cf32d39c348/lib/src/functions/color.dart#L718-L756
|
||
|
|
const mix = (color1, color2, weight = 50) => {
|
||
|
|
const { r: r1, g: g1, b: b1, a: a1 } = Color.parse(color1);
|
||
|
|
const { r: r2, g: g2, b: b2, a: a2 } = Color.parse(color2);
|
||
|
|
const weightScale = weight / 100;
|
||
|
|
const weightNormalized = (weightScale * 2) - 1;
|
||
|
|
const alphaDelta = a1 - a2;
|
||
|
|
const weight1combined = ((weightNormalized * alphaDelta) === -1) ? weightNormalized : (weightNormalized + alphaDelta) / (1 + weightNormalized * alphaDelta);
|
||
|
|
const weight1 = (weight1combined + 1) / 2;
|
||
|
|
const weight2 = 1 - weight1;
|
||
|
|
const r = (r1 * weight1) + (r2 * weight2);
|
||
|
|
const g = (g1 * weight1) + (g2 * weight2);
|
||
|
|
const b = (b1 * weight1) + (b2 * weight2);
|
||
|
|
const a = (a1 * weightScale) + (a2 * (1 - weightScale));
|
||
|
|
return rgba(r, g, b, a);
|
||
|
|
};
|
||
|
|
/* EXPORT */
|
||
|
|
export default mix;
|