benchmark/scripts/color.js


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function Color(hex = '#000000')
{  
  this.hex = hex;

  var r = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(this.hex);

  this.rgb = {r: parseInt(r[1], 16),g: parseInt(r[2], 16),b: parseInt(r[3], 16)}

  this.r = this.rgb.r;
  this.g = this.rgb.g;
  this.b = this.rgb.b;

  this.average = parseInt((this.rgb.r + this.rgb.g + this.rgb.b)/3)
  this.invert = {r:255-this.rgb.r, g:255-this.rgb.g, b:255-this.rgb.b};

  this.contrast = function(b)
  {
    let a_lum = 0.2126 * _linear(this.r / 256) + 0.7152 * _linear(this.g / 256) + 0.0722 * _linear(this.b / 256)
    let b_lum = 0.2126 * _linear(b.r / 256) + 0.7152 * _linear(b.g / 256) + 0.0722 * _linear(b.b / 256)
    return a_lum > b_lum ? (a_lum + 0.05) / (b_lum + 0.05) : (b_lum + 0.05) / (a_lum + 0.05);
  }

  this.rgba = function()
  {
    return "rgba("+this.rgb().r+","+this.rgb().g+","+this.rgb().b+",1)";
  }

  this.floats = function()
  {
    return { r:this.rgb.r/255, g:this.rgb.g/255, b:this.rgb.b/255 }
  }

  this.toString = function()
  {
    return this.hex;
  }

  function _linear(v){ return (v <= 0.03928) ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4); }
}