js2png

#!/usr/bin/env ruby
require 'ftools'
require 'rubygems'
require 'RMagick'
include Magick

files = [ 
          'javascripts/f.js',
          'javascripts/p.js',
          'javascripts/gh.js',
          'javascripts/diff.js',
          'javascripts/keyboard.js',
          
          'javascripts/vendors/difflib.js',
          'javascripts/vendors/diffview.js'
           # 'javascripts/prototype.js'
        ]

temp_file           = 'merge.js'
min_temp_file       = 'merge.min.js'
image_file          = "code.png"
crushed_image_file  = "code.crushed.png"

# Merged and minify scripts
merged_file = ""
files.each {|file| 
  File.open( file, "r") { |f| 
    merged_file += f.read + "\n" 
  }
}
File.open( temp_file , "w") {|f| f.write(merged_file) }

cmd = "java -jar bin/yuicompressor-2.4.2.jar #{temp_file} -o #{min_temp_file}"

js = `#{cmd}`

# debug out put
# File.open( min_temp_file , "w") {|f| f.write(js) }
js = ''
File.open( min_temp_file, "r") { |f| js += f.read + "\n" }

image = Magick::Image.new(1,js.length)
i = 0
while i < js.length do 
  # color is in format #RRGGBB
  color = '#%02X0000' % js[i]

  x, y = 0, i
  pixel = Magick::Pixel.from_color color
  image.pixel_color x, y, pixel
  i += 1
end


image.compression = ZipCompression
image.write("png8:"+ image_file)

File.open( temp_file , "r" )
pic = (Image.read(image_file)).first


# puts "Validates Output"
# s = ''
# pic.each_pixel do |px, x, y|
#   s += (px.red   % 256).chr
# end
# puts s == js


puts "Script Length:  #{js.length}"

temp_file           = 'merge.js'
min_temp_file       = 'merge.min.js'
image_file          = "code.png"
[ temp_file, min_temp_file, image_file ].each do |file|
  puts "#{"%-20.20s" % file} #{"%30s" % File.stat( file ).size}"
end