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self.addEventListener('activate', () => {
  self.clients.claim();
});

self.addEventListener('fetch', (event) => {
  if (event.request.method !== 'GET' || event.request.destination !== 'script') {
    return;
  }

  event.respondWith(fetch(event.request).then((response) => {

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// from http://lolengine.net/blog/2013/07/27/rgb-to-hsv-in-glsl

vec3 rgb2hsv(vec3 c)
{
  vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
  vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
  vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
  
  float d = q.x - min(q.w, q.y);
  float e = 1.0e-10;

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//  http://www.iquilezles.org/www/articles/morenoise/morenoise.htm
//  Hector Arellano

float rand(vec2 co){
    return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
}


const float inv289 = 0.00346020761;

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Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);
	return mix(rand(fl), rand(fl + 1.0), fc);
}

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/*

JavaScript port of the following algorithm : http://scale2x.sourceforge.net/algorithm.html

*/

var scaleX = ( function( exports )
{

    function getPixel32( data, x,y,w )

damienmortini

/*
** Copyright (c) 2012, Romain Dura [email protected]
** 
** Permission to use, copy, modify, and/or distribute this software for any 
** purpose with or without fee is hereby granted, provided that the above 
** copyright notice and this permission notice appear in all copies.
** 
** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 
** WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 
** MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY