Google QR Code Generator is Deprecated

I've got the QR Code plug-in in Barcode working with the PHPQRCode library (https://github.com/t0k4rt/phpqrcode). This is my qrcode.inc (Barcode module QR Code plug-in):

function barcode_qrcode_barcode($barnumber, $settings) {
  require_once libraries_get_path('phpqrcode') . '/qrlib.php';

  $name = md5($barnumber);
  $img = $settings->default_path .'/'. $name . $settings->encode .'.png'; 

  header("Content-Type: image/png");
  QRcode::png($barnumber, $img, 'H', 8, 2);
}

You must install the libraries module & install the phpqrcode library in sites/all/libraries.

Notes: I have hardcoded the QR Code size & image format into the plug-in (& also changed the error correction quality to high). phpqrcode library only allows png, svg, & eps formats, I believe. And the size settings are a little more involved with this library than with Google's deprecated service: Google lets you set the image size you want (e.g., 200x200 pixels) & it does all the calculations for module size, etc. See http://www.qrcode.com/en/vertable1.html & http://phpmaster.com/generate-qr-codes-in-php/ for more information about QR Code sizing issues. So the way I have this written, it won't take values from the field's settings for size. I don't have time, unfortunately, to look at the code for those settings & figure out a good way of setting sizes, so I've simply hard-coded it for my needs.

If anyone wants to take this & incorporate it into Barcode, feel welcome to do so.

H.

Google's going to be shutting down its QR Code generator, on which this module depends. I have got it working using the phpqrcode library instead.

You can use the code above to integrate with the library. One issue I had is that you couldn't define an absolute size in pixels for your bar code. I found a patch to the QR Code library that will allow you to do that. At:

http://sourceforge.net/tracker/?func=detail&aid=3543454&group_id=311533&...

Apply the patch to your phpqrcode library, then use the following code in the barcode module's qr code plugin:

function barcode_qrcode_barcode($barnumber, $settings) {
  require_once libraries_get_path('phpqrcode') . '/qrlib.php';

  $name = md5($barnumber);
  $img = $settings->default_path .'/'. $name . $settings->encode .'.png'; 

  header("Content-Type: image/png");
define('IMAGE_WIDTH',200);
define('IMAGE_HEIGHT',200);
  QRcode::png($barnumber, $img, 'H', 10, 0);
}

Works perfectly for me. Hope the developers will be able to use this info.

This is now critical as the current QRCode functionality is broken by the demise of Google's QRCoding service. Also a bug for the same reason.

The phpqrcode library will not natively let you set an absolute size in pixels for height & width. For different inputs you will get different sizes of QRCodes. In order to be able to set an absolute size for your barcodes using the phpqrcode library you must apply the patch at Sourceforge I linked to in #3 to your phpqrcode library (not to this module). Then what I did was hardcode my chosen dimensions into the QRCode plugin of the barcode module

The patch at #4 does not account for the lack of settings for fixed dimensions in the stock phpqrcode library, so keep that in mind if that's important to you.

I am attaching a patch that makes the Barcode module use the phpqrcode library to generate QRCodes.

What it does:

1) Changes the settings form to permit selecting PNG or SVG format for QRCodes, & also the qrcode.inc plugin will now use the height setting here for its image dimensions.

2) Changes qrcode.inc to use the phpqrcode library. It will use the settings from the field settings page (see above). It includes definitions to permit the size in pixels setting to work with the phpqrcode library. Contrary to my previous code, it doesn't set a header, so it incorporates the changes suggested in #4.

3) It includes the phpqrcode library as a subfolder of the Barcode module. The version incorporated here has been patched with the patch I mentioned at #3, which permits the phpqrcode library to output images of a fixed pixel width & height. That is the only reason I am including it in this patch rather than suggesting installing it as a library with the Libraries module. It also accounts for the patch's size; apart from the phpqrcode inclusion it is quite small.

It applies cleanly against the most recent dev & works for me with both png & svg images, saving them to the public files directory as normal with the dimensions specified in settings.

Please review & commit soon, as this is completely broken currently.

Whoops. The last patch I uploaded had some extraneous files. This one is clean & is the one to be reviewd.

Hi,

Actually the whole patched library is part of the patch at #10, so you can see the whole thing in the patch. The license of the library is GPLv3.