*** NEW REQUIRE POLICY ***

Barcode symbologies are no longer requires automatically, so you'll have to
require the ones you need. If you need EAN-13, require 'barby/barcode/ean_13'.
Full list of symbologies and filenames below.

***

Barby is a Ruby library that generates barcodes in a variety of symbologies.
Its functionality is split into barcode and "outputter" objects. Barcode
objects turn data into a binary representation for a given symbology.
Outputters then take this representation and turns it into images, PDF, etc.

You can easily add a symbology without having to worry about graphical
representation. If it can be represented as the usual 1D or 2D matrix of
lines or squares, outputters will do that for you.

Likewise, you can easily add an outputter for a format that doesn't have one
yet, and it will work with all existing symbologies.

See Barby::Barcode and Barby::Outputter for more information.

 require 'barby'
 require 'barby/barcode/code_128'
 require 'barby/outputter/ascii_outputter'

 barcode = Barby::Code128B.new('BARBY')
 
 puts barcode.to_ascii #Implicitly uses the AsciiOutputter

 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
 ## #    #  #   # ##   # #   ##   ##   # ### #   # ##   ### ## #   ## ### ### ##   ### # ##
            B          A          R          B          Y


Supported symbologies:

Name - filename - dependencies

require 'barby/barcode/<filename>'

* Code 25 - code_25
  * Interleaved - code_25_interleaved
  * IATA - code_25_iata
* Code 39 - code_39
* Code 93 - code_93
* Code 128 - code_128
  * GS1 128 - gs1_128
* EAN-13 - ean_13
  * Bookland - bookland
  * UPC-A - ean_13
* EAN-8 - ean_8
* UPC/EAN supplemental, 2 & 5 digits - upc_supplemental

* QR Code - qr_code - rqrcode
* DataMatrix (Semacode) - data_matrix - semacode
* PDF417 - pdf_417 - java (JRuby)


Formats supported by outputters:

* Text (mostly for testing)
* PNG, JPEG, GIF
* PS, EPS
* SVG
* PDF
* HTML


Outputters:

filename (dependencies)

require 'barby/outputter/<filename>_outputter'

* ascii
* cairo (cairo)
* html
* pdfwriter
* png (chunky_png)
* prawn (prawn)
* rmagick (RMagick)
* svg