c0lor/rgb.js

Color space conversions

var O, rgbPrototype, round, toByte, validRgbEl;

O = require("ut1l/create/object");

round = Math.round;

toByte = function(d) {
  if (d != null) {
    return round(d * 255);
  }
};

validRgbEl = function(x) {
  return (isFinite(x)) && (0 <= x && x <= 1);
};

rgbPrototype = {
  RGB: function(T) {
    if (T == null) {
      T = require("./RGBInt")();
    }
    T.R = toByte(this.r);
    T.G = toByte(this.g);
    T.B = toByte(this.b);
    return T;
  },
  set: function(r, g, b) {
    this.r = r;
    this.g = g;
    this.b = b;
    return this;
  },
  isDefined: function() {
    return (this.r != null) && (this.g != null) && (this.b != null);
  },
  isValid: function() {
    return this.isDefined() && (validRgbEl(this.r)) && (validRgbEl(this.g)) && (validRgbEl(this.b));
  },
  toString: function() {
    return "r=" + this.r + ", g=" + this.g + ", b=" + this.b;
  }
};

module.exports = O({
  extendRgb: function(f) {
    return f(rgbPrototype);
  }
}, (function(r, g, b) {
  this.r = r;
  this.g = g;
  this.b = b;
}), rgbPrototype);