QRCode
A small extension to encode and decode QR codes. It relies on buffers.
For the supported set of QRCodes to decode, see the documentation for Quirc decoded The encoder supports the traditional QR code type.
The QRCode extension itself should be supported on all platforms. However, the example app relies on getting images from the camera and that extension is currently only supports OSX, iOS and Android (and the Android support is very work-in-progress)
Example app
Push the Scan button to start scanning for qrcodes. The camera starts running and the the app scans the
camera image for the first qrcode. Similarly, push the QRCode button to create a qrcode:
Lua api:
qrcode.scan(buffer, width, height, flip_x) -> string
Scans an image buffer for any qrcode.
buffer An image buffer where the first stream must be of format UINT8 * 3, and have the dimensions width*height
width The width of the image, in texels
height The height of the image, in texels
flip_x A boolean flag (1 or 0) that tells the decoder to flip the image in X first.
-> string Returns a the text from the qrcode if successful. Returns nil otherwise
qrcode.generate(text) -> buffer, size
Generates a qrcode in the form of a buffer of format: name = 'data', type = UINT8 * 1, and dimensions size * size
text The text that needs decoding. The maximum text length is dependent on the input data. Kanji is currently not supported specifically, but will be treated as bytes
-> buffer An image buffer of dimensions size * size. The stream name is data and the type+count is UINT8 * 1
-> size The size of one side of the image
Credits:
Decoder
https://github.com/dlbeer/quirc
Encoder
https://github.com/JCash/qrcode
I also use this site to create test images: https://www.the-qrcode-generator.com/