rqrcode_coreis a ruby only library. It requires no native libraries. Just Ruby!
- It is an encoding library. You can't decode QR codes with it.
- The interface is simple and assumes you just want to encode a string into a QR code.
- QR code is trademarked by Denso Wave inc.
rqrcode_core is the basis of the popular
rqrcode gem [https://github.com/whomwah/rqrcode]. This gem allows you to generate different renderings of your QR code, including
Add this line to your application's Gemfile:
And then execute:
Or install it yourself as:
$ gem install rqrcode_core
$ require 'rqrcode_core' $ qr = RQRCodeCore::QRCode.new('my string to generate', size: 4, level: :h) $ puts qr.to_s
xxxxxxx x x x x x xx xxxxxxx x x xxx xxxxxx xxx x x x xxx x xxxxx x xx x xxx x ... etc
Doing your own rendering
require 'rqrcode_core' qr = ::.('my string to generate', size: 4, level: :h) qr.modules.each do |row| row.each do |col| print col ? '#' : ' ' end print "\n" end
The library expects a string to be parsed in, other args are optional.
string - the string you wish to encode size - the size of the qrcode (default 4) level - the error correction level, can be: * Level :l 7% of code can be restored * Level :m 15% of code can be restored * Level :q 25% of code can be restored * Level :h 30% of code can be restored (default :h) mode - the mode of the qrcode (defaults to alphanumeric or byte_8bit, depending on the input data): * :number * :alphanumeric * :byte_8bit * :kanji
qr = ::.('hello world', size: 1, level: :m, mode: :alphanumeric)
After checking out the repo, run
bin/setup to install dependencies. Then, run
rake test to run the tests. You can also run
bin/console for an interactive prompt that will allow you to experiment.
Bug reports and pull requests are welcome on GitHub at https://github.com/whomwah/rqrcode_core.
The gem is available as open source under the terms of the MIT License.