zazaulola

export function createWorker(callable) {
  const code = `(${callable.toString()})()`;
  const blob = new Blob([code], { type: 'text/javascript' });
  const url = URL.createObjectURL(blob);
  const worker = new Worker(url);
  URL.revokeObjectURL(url);
  return worker;
}

export function executeWorker(callable, data) {

zazaulola

const s2l = c => (c > 0.04045 ? ((c + 0.055) / 1.055) ** 2.4 : c / 12.92);
const l2s = c => (c > 0.0031308 ? 1.055 * Math.pow(c, 1 / 2.4) - 0.055 : 12.92 * c);
const LINEAR = new Array(256).fill().map((_, i) => s2l(i / 255));

onmessage = ({ data: { srcData, srcWidth, srcHeight, dstWidth, dstHeight } }) => {
  const { ceil, floor, abs, min, hypot } = Math;
  const ratioH = srcHeight / dstHeight;
  const ratioW = srcWidth / dstWidth;
  const halfRatioW = ceil(ratioW / 2);
  const halfRatioH = ceil(ratioH / 2);

zazaulola

onmessage = ({ data: { data, width, height } }) => {
  const add = (d, i, v) => {
    if (i >= d.length) return;
    d[i] += v;
  };

  let i = 0,
    w = width * 4;
  for (let y = 0; y < height; y++) {
    for (let x = 0; x < width; x++, i += 4) {

zazaulola

onmessage = ({ data: { data, width, height } }) => {
  const thresholdMap = [
    [15, 135, 45, 165],
    [195, 75, 225, 105],
    [60, 180, 30, 150],
    [240, 120, 210, 90],
  ];

  let min = 255,
    max = 0,

zazaulola

onmessage = ({ data: { data, width, height } }) => {
  const add = (d, i, v) => {
    if (i >= d.length) return;
    d[i] += v;
  };

  const w = width * 4;
  let i = 0;
  for (let y = 0; y < height; y++) {
    for (let x = 0; x < width; x++, i += 4) {

zazaulola

// Matrices multiply
const multiply = (a, b) => a.map((_, r) => b[0].map((_, c) => a[r].reduce((s,_,i) => s + a[r][i] * b[i][c], 0)));

zazaulola

const color_distance = ([ L1, a1, b1 ], [ L2, a2, b2 ] ) => Math.hypot( L1 - L2, a1 - a2, b1 - b2 );

const linear =  x => x >= 0.04045 ? ((x + 0.055) / (1 + 0.055)) ** 2.4 : x / 12.92;

const gamma = x => x >= 0.0031308 ? 1.055 * x ** (1 / 2.4) - 0.055 : 12.92 * x;

const clamp = x => Math.min ( 255, Math.max ( 0, x ) );

const multiply = (a, b) => 

zazaulola

/**
 * Find all elements with openned ShadowRoots
 *
 * @param {Node} e - An element that we should search for ShadowRoots within.
 * @returns {Array<Element>} Array of Elements that holds ShadowRoot
 */
const findRoots = (e = document.documentElement) => 
  [e,...e.querySelectorAll('*')]
    .filter(e => e.shadowRoot)
    .flatMap(e => [e, ...findRoots(e.shadowRoot)]);

zazaulola

// calculate week number for date

function calcWN(y, m, d) {
  let J = gc2jd(y, m, d);
  let d4 = (J + 31741 - J % 7) % 146097 % 36524 % 1461;
  let L = 0 | d4 / 1460;
  let d1 = (d4 - L) % 365 + L;
  return (0 | d1 / 7) + 1;
}

zazaulola

   // Debug mode
const DEBUG = true;

const log = (...args) => {
  if (DEBUG) console.log(...args);
}
    // regular expression to parse numbers
const rxNumberStr = '[+-]?(?:(?:[0-9]+\\.[0-9]+)|(?:\\.[0-9]+)|(?:[0-9]+))(?:[eE][+-]?[0-9]+)?';
// regular expression to  parse next lemma from d attribute of <path> 
const rxDLemmaStr = `[MmLlHhVvCcSsQqTtAaZz]|${rxNumberStr}`;