rqrcode_png

Problem: You need to generate your own QR code images
Solution: rqrcode_png

Overview

rqrcode_png extends rqrcode, adding one simple method to instances of QRCode, #to_img. ChunkyPNG is used to generate the image itself in pure Ruby. As few assumptions are made as possible regarding the image itself.

Rewrite

fork and rewrite part of the function
1. add size border size param
2. add qrcode color param

Usage

require 'rqrcode_png'

qr = RQRCode::QRCode.new( 'my string to generate', :size => 4, :level => :h )
png = qr.to_img                                             # returns an instance of ChunkyPNG
png.resize(90, 90).save("really_cool_qr_image.png")

NOTE: For now, the :size of the QR code has to be 14 or less. Working on this.

Bundler

gem 'rqrcode_png'

Rails

With DragonFly

# app/models/product.rb
class Product < ActiveRecord::Base
  image_accessor :qr_code
end

# somewhere
qr_code_img = RQRCode::QRCode.new('http://www.google.com/', :size => 4, :level => :h ).to_img
@product.update_attribute :qr_code, qr_code_img.to_string

# app/controllers/products.rb
def show
    @product = Product.find(params[:id])
end

# app/views/products/show.html.erb
<%= image_tag @product.qr_code.url %>

Contributing

  • Fork the project
  • Send a pull request
  • Don't touch the .gemspec, I'll do that when I release a new version

MIT Licence (http://www.opensource.org/licenses/mit-license.html)