QRCode - Implement QR Code in Elixir

I’m not sure, perhaps you should ask the original author in the repo?

I’d not use the matrix directly, as it is badly documented, and especially the matrix field is allowed to contain anything.

Another reason not to use the library at all is, that it’s not on hex and hasn’t been touched on the repo for about a year.

Thx for your fast an answer. QRCode.render gives me, see picture below

qrcode-nil292×236 3.93 KB

So I don’t know if this is fine. We’re working with this matrix further in project (we render the matrix to svg). Can I assume if this turquoise color we’ll change to white the functionality of QR would be still okay?

If it QRCode.render/1s fine, I’d think so.

Hi everyone.
I’m now a little bit confused. In our a project we used this Sunboshan’s library, e.g this way:

QRCode.encode("http://localhost:4040/events//Users/smita/projects/elixir/fotobouda/server/photo/tmps/2018-07-28_07-44-15-809348_original-ocwo.jpg")

And as you can see in terminal output, the QRCode.Matrix contains a couple of nils. Is that correctly behaviour?

Thx, it’s fixed now.

You really should properly organizer your code into modules and submodules. The current flat hirarchy will possibilly clash with other libraries from hex somewhen.

Or if anyone want to use Svg (instead of Canvas), you can use this a library.

Or instead of using js, becaouse… You know… Not everything resolves about web pages you can just use existing Erlang libraries like i.e. png/README.md at master · yuce/png · GitHub

@Raddi_On: There are no image data. Only qrcode matrix - i.e. info about rows, columns and cells. You need to use these info (like I do in Elixir example) to get x, y, width and height and color and pass them to Canvas draw and fill functions.

You will export canvas to image - not create canvas from image.
Canvas will allow you to export to more formats than simple png.

Of course nothing stops you from hiding canvas and get base64 string from it after you will done drawing. Then you can add image tag with that base64 string.

That’s an array of arrays. Doesn’t it have to be converted an image format before it’s passed to a phoenix template?