Library to generate QR codes from bytestrings and objects and scale image files https://github.com/vmchale/QRRepa#readme
|Latest on Hackage:||0.1.0.0|
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QR Imager Library
This is a library to generate
.png files from QR codes.
The library depends on the C library https://github.com/fukuchi/libqrencode which you will need to install separately.
The library exports main functions -
byteStringToQR - and their secured/signed versions. The first takes any object that is an instance of
ToJSON and writes an image to file, while the second takes a (strict) bytestring and writes it to file.
For building haskell, the best tool is currently http://haskellstack.org. Install it, and then type
stack install --install-ghc
in the appropriate directory, and it will be installed on your path.
Compiling will generate an executable called
QRPipe which reads from
stdin and outputs a file as the second argument, e.g.
`echo 'My name is:" | qrpipe "nametag.png"`