gistfile1.txt

  version :thumb do
    def full_filename(for_file)
      super(for_file).chomp(File.extname(super(for_file))) + '.jpg'
    end 
    
    def convert_thumb_to_jpg  
      manipulate! do |image|
        image.auto_orient
        image.format 'jpg'
        landscape = "75x56"
        portrait = "56x75"
        orientation = image[:height] > image[:width] ? portrait : landscape
        image.resize orientation
        image
      end
    end       
    
    process :convert_thumb_to_jpg