qr-cairo

========================= Qr Code genartor for node

Another Qr library for nodejs, but this one you could customize more things on you Qr code result, (still needs some work), the current version support a lot of stuff like changing background and code color.

This library is based on the native Cairo library and libqrencode library, so as requirements you should had this two libraries on your OS.

You can get Cairo library from here http://www.cairographics.org/download/

And libqrencode from here https://fukuchi.org/works/qrencode/

Installation

To install qr-cairo you can download the library and install easily with npm command

npm install qr-cairo

Usage

The code below show a basic example of generating an image with Qr code, the genereted code will had as default, transparent background color, black filling color and the correction level by default is low.

var qr_cairo = require('qr-cairo');

// Qr without options
qr_cairo.save('http://aminekabab.me/blog', 'test1.png');

Advanced Usage

Currently qr-cairo has one method that generate the qr image

qr_cairo.save(value, path [, options])

value is the message that you want to encode as Qr code

path the path where you want to save the generated image

option JSON object that can contain the following parameters

option.back_color the background color in hexadecimal format (default color is transparent)

option.fill_color code drawing color (default : #000000)

option.ec_level error correction level ('L' : LOW, 'M' : MEDIUM, 'Q' : QUALITY, 'H', HIGH)

option.box_size the box size in pixel in the qrcode

var qr_cairo = require('qr-cairo');

// Qr with options 
var options = {'ec_level': 'l', 'box_size': '20', 'back_color': '#ee4444', 'fill_color': '#222200'};
qr_cairo.save("Amine", "test2.png", options);