zxing_cpp

github.com/glassechidna/zxing_cpp.rb

DESCRIPTION:

zxing_cpp is a Ruby interface for the ZXing C++ barcode and QR code library.

It is a light-weight fork of zxing.rb (github.com/smparkes/zxing.rb).

FEATURES:

Wraps the ZXing C++ library (github.com/glassechidna/zxing-cpp)

SUPPORT:

The bug tracker is available here:

https://github.com/glassechidna/zxing_cpp.rb/issues

SYNOPSIS:

require 'zxing'
result = ZXing.decode "myimage.png"

zxing_cpp also comes with a command that decodes images: zxd:

$ zxd filename.png
<decoded contents>

zxd can take multiple arguments and the arguments can be URLs.

zxing_cpp provides access to many of the classes of ZXing classes like readers, luminance sources, binarizers, so you can mix and match your own applications much as you would with a native Java or C++ app. See zxd and test/vendor.rb for examples.

NOTE: There is a proto-encoder (zxe) in the works but the C wrapper code is yet to be written.

Using the ZXing module

require 'zxing'

# You can decode a URL...
ZXing.decode 'http://2d-code.co.uk/images/bbc-logo-in-qr-code.gif'

# ... or a file path...
ZXing.decode '/Users/ecin/qrcode.png'

# ... or a File object...
ZXing.decode File.open('qrcode.png')

# ... or anything that returns a URL or file path when #path or #to_s 
# is called on it.
class Image
  attr_reader :path
  def initialize(path); @path = path end
end

image = Image.new('qrcode.png')
ZXing.decode image

# #decode returns nil if it can't decode the image.
ZXing.decode 'image_without_a_code.png'
# => nil

# #decode! will raise an error if it can't decode the image.
ZXing.decode! 'image_without_a_code.png'
# => NativeException

# Feel free to include ZXing to shorten the call.
include ZXing

decode 'qrcode.png'

Including the Decodable module

require 'zxing/decodable'

class File
  include Decodable
end

file = File.open('qrcode.png')
file.decode

REQUIREMENTS:

Ruby (>= 1.9)
CMake (>= 2.8.0)

zxing_cpp bundles a version of the ZXing C++ library (zxing-cpp).

INSTALL:

If you’re using RubyGems (probably), then simply add the following to your Gemfile:

gem 'zxing_cpp'

Alternatively, you could clone the zxing_cpp repo and execute:

rake gem
gem install pkg/zxing_cpp-0.1.0.gem

DEVELOPMENT:

rake test

rake test runs the zxing_cpp unit tests.

LICENSE:

(The MIT License)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ‘Software’), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED ‘AS IS’, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.