ddgromit

# Adapted from the javascript implementation at http://sedition.com/perl/javascript-fy.html

# Randomizes the order of elements in the passed in array in place.
fisherYates = (arr) ->
    i = arr.length;
    if i == 0 then return false

    while --i
        j = Math.floor(Math.random() * (i+1))
        tempi = arr[i]

abachman

# rgb <-> hsl algorithms from
# http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript

Colors =
  #
  # Converts an RGB color value to HSL. Conversion formula
  # adapted from http://en.wikipedia.org/wiki/HSL_color_space.
  # Assumes r, g, and b are contained in the set [0, 255] and
  # returns h, s, and l in the set [0, 1].
  #

fupslot

function dataURItoBlob(dataURI, callback) {
    // convert base64 to raw binary data held in a string
    // doesn't handle URLEncoded DataURIs - see SO answer #6850276 for code that does this
    var byteString = atob(dataURI.split(',')[1]);

    // separate out the mime component
    var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0]

    // write the bytes of the string to an ArrayBuffer
    var ab = new ArrayBuffer(byteString.length);