1 stable release

1.1.0 Jan 12, 2021
1.0.0 Feb 17, 2020

#858 in Images

30 downloads per month

MIT license

56KB
1K SLoC

qrcode53bytes

Things are changing fast. 2020-02-17 LucianoBestia ver.1.0.0.

I need to generate a simple QR code for url that has max 53 bytes. I want to do this in wasm.
QR codes are pretty complicated. So specifying only one single use-case makes the code smaller. But it looses universality.
Smaller code is good for wasm.
The url I want to encode is like this:
https://bestia.dev/mem6/#p04.1234
There is a hash symbol here so I cannot use the alphanumeric mode.
I must use the byte mode.
There are 33 characters. It means there is some free space for future uses.
The smallest QR code for that is:

  • version 3
  • 29x29 modules
  • ECC Level L
  • data bits 440
  • 53 bytes
  • ISO-8859-1

The code is written by treeman. I just removed all the variants I don't need.

I use this code my wasm project https://github.com/LucianoBestia/mem6_game.

cargo crev reviews and advisory

It is recommended to always use cargo-crev
to verify the trustworthiness of each of your dependencies.
Please, spread this info.
On the web use this url to read crate reviews. Example:
https://web.crev.dev/rust-reviews/crate/num-traits/

Examples

 cargo run --example svg

References

https://github.com/treeman/rqr
https://www.thonky.com/qr-code-tutorial

changelog

1.1.0 bitvec dependency was yanked. updated to 1.17.4, but later versions have breaking changes

Dependencies

~1MB
~21K SLoC