QR Code generation in Node.js using libqrencode and libpng
- node v0.10 (v0.12 is not supported at present)
- libpng
- libqrencode
-
Install libpng(-dev) and libqrencode(-dev) using the package manager of your choice.
-
npm install qrc
var qrc = require('qrc');
var qrBuffer = qrc.encode('Some text to put in a QR Code');
// or:
var qrPngBuffer = qrc.encodePng('Some text to put in a QR Code PNG');
// of course there are some options:
var qrPngBuffer = qrc.encodePng('Test', {
version: 4,
ecLevel: qrc.EC_H,
dotSize: 5,
margin: 2,
foregroundColor: 0xFF0000,
backgroundColor: 0x00FF00
});
version – Minimum version of QR Code, valid values: 1-41, 0 = auto
[default]
ecLevel – error correction level, valid values: EC_L (lowest [default]) –
EC_M – EC_Q - EC_H (highest)
mode – QR code mode, valid values: MODE_NUM (numeral)– MODE_AN (alphanumeric)–
MODE_8 (8-bit binary [default])- MODE_KANJI (kanji)
dotSize* – Size of one ‚dot‘ in pixels, valid values: 1-50
(default: 3)
margin* – Size of margin (in dots with background color),
valid values: 0-10 (default: 4)
foregroundColor* – Foreground color, valid values:
0x0-0xFFFFFF (default: 0x0 [= black])
backgroundColor* – Background color, valid values: 0x0-0xFFFFFF (default:
0xFFFFFF [= white])
* = PNG encoding only
QR Code is a registered trademark of DENSO WAVE INCORPORATED.
Copyright (C) 2013 Tobias Muellerleile [email protected]
Copyright (C) 2015 Net Oxygen Sàrl [email protected]
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
