QRCode v3.0.0 is out!

See news below:

Changed

• The main usage is now simplified:

  # QRCode.create() has default :low error correction and :byte mode
  "your_string" 
  |> QRCode.create() 
  |> QRCode.render() 
  |> QRCode.save("/tmp/qr_code.svg")
  

  Instead of QRCode.save(), you can use a function QRCode.to_base64() to encode QR to base 64.

• In SVG settings was changed the option :format with type :none or :indent on :structure with :minify (default value) or :readable for more clearer using. The variable :structure now reflects the structure of svg file. The final svg can be minified using by :minify or :readable and thus little bit larger.

Added

• Alphanumeric mode, thank for mpichette contribution.

  # QRCode.render() has default :svg and SvgSettings
  "your_string" 
  |> QRCode.create(:low, :alphanumeric) 
  |> QRCode.render() 
  |> QRCode.save("/tmp/qr_code.svg")
  

• Embedded image to svg. Support embedded image are only type: jpeg, jpg, png, or svg.

  # image = {".../path/to/name.type", size}, where size must be positive integer and means how embedded image will be large in the final svg file
  iex> alias QRCode.Render.SvgSettings
  iex> image = {"/docs/elixir.svg", 100}
  iex> qr_color = {17, 170, 136}
  iex> svg_settings = %SvgSettings{qrcode_color: qr_color, image: image, structure: :readable}
  %QRCode.Render.SvgSettings{
    background_color: "#ffffff",
    background_opacity: nil,
    image: {"/docs/elixir.svg", 100},
    qrcode_color: {17, 170, 136},
    scale: 10,
    structure: :readable
  }
  iex> "your_string"
        |> QRCode.create()
        |> QRCode.render(:svg, svg_settings)
        |> QRCode.save("/tmp/qr-with-image.svg")
    {:ok, "/tmp/qr-with-image.svg"}
  

  

  qr_code_emb_img330×330 11.3 KB

• Png render. You can save the QR to png file.

  # You can use PngSettings similar as above in QRCode.render(:svg) 
  ...
  |> QRCode.render(:png) 
  |> QRCode.save("/tmp/qr_code.png")
  

More information and examples will find on hex.pm or check the Github library.