RubyIdenticon

create-identicon.rb

require 'ruby_identicon'

# background_color:  (Integer, default 0) the background color of the identicon in rgba notation (e.g. xffffffff for white)
# border_size:       (Integer, default 35) the size in pixels to leave as an empty border around the identicon image
# grid_size:         (Integer, default 7)  the number of rows and columns in the identicon, minimum 4, maximum 9
# square_size:       (Integer, default 50) the size in pixels of each square that makes up the identicon
# key:               (String) a 16 byte key used by siphash when calculating the hash value (see note below)
#
# Varying the key ensures uniqueness of an identicon for a given title, it is assumed desirable for different applications
# to use a different key.

Dir.mkdir("tmp") unless File.directory?("tmp")

options = {
  grid_size: 7,
  square_size: 50,
  background_color: 0,
  border_size: 35
}

time = Time.now.strftime('%H_%M_%S')
filename = "identicon_#{options[:grid_size]}_#{options[:square_size]}_#{time}"

RubyIdenticon.create_and_save('examtime', "tmp/#{filename}.png", options)