avatars.rb

require 'rubygems'
require 'digest/md5'
require 'sinatra'

require 'RMagick'
include Magick

get '/avatar' do
  format = 'png'
  content_type format
  w,h = 300,300

  face = Image.new(w,h)
  face.format = format

  #face.draw img
  eyes(face)
  mouth(face)
  face = face.gaussian_blur(0.0, 4.0)
  face = face.blend perlin, 0.85, 0.974
  #face = face.black_threshold 65535
  face = face.white_threshold 65535
  face.to_blob
end
def perlin
  Image.read(File.expand_path(File.dirname(__FILE__) +'/perlin.png'))[0]
end
def eyes(face)
  center = face.columns/2
  eye_distance = face.columns/6
  gaze_line = face.rows/6

  radius = face.columns/10
  eyes = Draw.new

  leyex = center - eye_distance
  reyex = center + eye_distance

  #add_round_eye  eyes, leyex, gaze_line, radius
  #add_round_eye  eyes, reyex, gaze_line, radius

  add_square_eye eyes, leyex, gaze_line, radius, radius*3
  add_square_eye eyes, reyex, gaze_line, radius, radius*3

  eyes.draw face
end
def add_round_eye(eyes, x, y, r)
  eyes.circle x, y,
            x+r, y
end
def add_square_eye(eyes,x,y,w,h)
  eyes.rectangle x-w, y-w, x+w, y+h

end
def mouth(face)
  mouth = Draw.new
  center = face.columns/2
  mouth_line = face.rows - face.rows/2.3
  mouth_curvature = mouth_line + face.rows/1.8
  mouth_width = face.columns/4

  mouth.bezier center-mouth_width,mouth_line,
               center-mouth_width,mouth_curvature,
               center+mouth_width,mouth_curvature,
               center+mouth_width,mouth_line

  mouth.draw face
end