How to decode QR Code on wasm ?

[LZHD]

I try qzxing , The program crashes when decoding. "Application exit (Assertion failed: Exception thrown, but exception catching is not enabled. Compile with -sNO_DISABLE_EXCEPTION_CATCHING or -sEXCEPTION_CATCHING_ALLOWED=[..] to catch.)"

[Mesrine]

https://github.com/EddyTheCo/Esterv.Utils.QrCode
https://eddytheco.github.io/qmlonline/?example_url=qt_qr_dec

Any contribution/suggestion is welcome.

[LZHD]

@Mesrine Thanks, it looks very useful, I'll try it.

[Dougf9]

I can't figure out how to build a lib for qzxing so I can link it with my application. I've tried cmake and qmake and nothing out of the box works. How did you compile qzxing? I am using qt 6.8.2 on windows 11.

[LZHD]

@Mesrine Hello, I have been using this project with single thread before, but recently I switched to a multi-threading suite and cannot be compiled. It will prompt "wasm-ld: error: --shared-memory is disabled by aruco_board.cpp.o because it was not compiled with 'atomics' or 'bulk-memory' features." How to solve it?

[Mesrine]

@LZHD Hi, from the top of my head you need to compile opencv for wasm with multi threading support. Because if opencv is not found on your system it will download it from my github actions. but the downloaded Opencv-wasm library does not have multithreading support.

To be of more help you could open a detailed issue on the repo.

[LZHD]

@Mesrine Thanks, I also realize it is this problem and am trying to compile multi-threaded Opencv-wasm library