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require 'rubygems'
require 'RMagick'

class Pdf2PngConverter
  def initialize(*files)
    files.each do |file|
      pdf = Magick::ImageList.new(file)
      filename = "#{File.join(File.dirname(file), File.basename(file, '.*'))}.png"
      pdf[0].resize_to_fit(100,100).write(filename)
      # gem install smusher:
      # `smusher --service PunyPng #{filename}`
    end
  end
end

if ARGV.any?
  if ARGV.size > 1
    Pdf2PngConverter.new(*Dir.glob(ARGV))
  else
    Pdf2PngConverter.new(*Dir.glob(ARGV[0]))
  end
end