ZXing

[DonAlfredo]

Just to inform you.
I have ported the ZXing library towards FPC and Lazarus.

https://github.com/LongDirtyAnimAlf/ZXing.Delphi

Included are working demo's for Windows and Lazarus.
https://github.com/LongDirtyAnimAlf/ZXing.Delphi/tree/v_3.0/Lazarus

Please note.
This library makes extended use of generics.
ZXing library and demo's have been tested with FPC trunk and Lazarus trunk only.

[af0815]

Thx to DonAlfredo for his work.

I have done a try one year ago, but it was not successfull. So i know how much work it is, and how tricky some generic routines are programmed.

[DonAlfredo]

You are welcome !

Porting was not that hard: the new Delphi compatible Generics made life much easier than before. Besides, the new source is still Delphi compatible !

I use this ZXing port for desktops together with an Android app that also scans qr-codes with the help of the native Java ZXing library.

All done with FPC and Lazarus and LAMW and Generics !!!

[af0815]

I have seen you work with v4l2. Some Cameras are only working with gstreamer.

Have you experience with gstreamer too ? I have not found any ported header, nor a project in Lazarus/Freepascal using this library for video and shooting still pictures.

 

[Xor-el]

Just to inform you.
I have ported the ZXing library towards FPC and Lazarus.

https://github.com/LongDirtyAnimAlf/ZXing.Delphi

Included are working demo's for Windows and Lazarus.
https://github.com/LongDirtyAnimAlf/ZXing.Delphi/tree/v_3.0/Lazarus

Please note.
This library makes extended use of generics.
ZXing library and demo's have been tested with FPC trunk and Lazarus trunk only.

Edit:
Binaries for testing: https://github.com/LongDirtyAnimAlf/ZXing.Delphi/releases/tag/v3.5a

splendid, that's all I can say.
Good Job.
One Less Library to make FPC Compatible. 

Quick Question.
Is it possible for you to submit your changes as a pull request to the original repository.
it will make it less work to keep them in sync when the original repository makes an update.

Once again, well done and thanks.

[DonAlfredo]

Small update.

Done: unit tests have been added.
Todo: solve some memory leaks.

Is it possible for you to submit your changes as a pull request to the original repository.

If I am ready with my work on this library, I will ask the original author.
However, I think changes are dim, due to the many changes.
Delphi compatibility is still maintained, so that will not be a show-stopper.

Have you experience with gstreamer too ?

No, I don't. Due to my limited time, I have to restricts my efforts to my current use of this lib.

[DonAlfredo]

The work has been done.
ZXing has been ported 100%.
Consumed more effort due to memory-leaks: source had to be de-"ARC"-ed (ARC=auto-ref-count).

Two simple demo binaries (for Windows) are available:
https://github.com/LongDirtyAnimAlf/ZXing.Delphi/releases/latest

I have asked the author to have the two projects merged.

[avra]

I have asked the author to have the two projects merged.

Were they merged? What would be the recommended repo now?

Btw, it would be more convenient if there was a LPK file.

[Jurassic Pork]

hello DonAlfredo,
thanks for your work !
i have this problem to compile your zxing lazarus library : generic TList not working with Enumerated type with constant assignment.
Windows 10 Lazarus 2.0.12 fpc 3.2
Can you check that ?
Friendly, J.P

[trev]

As DonAlfredo notes "ZXing library and demo's have been tested with FPC trunk and Lazarus trunk only", I'd suspect you need to use FPC + Lazarus trunk.

[DonAlfredo]

@Jurassic Pork
This is a known problem. And easy to solve. Just compile again !
Yes, your read this correct: you need to compile the sources twice.
Seems to be a compiler problem, but I never took the time to look into it more closely.

[Jurassic Pork]

hello,
ok Thanks DonAlfredo it works !   
Friendly J.P

[DonAlfredo]

As you were able to isolate this problem (many thanks for that), I think its worth to file a bugger and have some FPC devs look at it.
I have filed it: https://bugs.freepascal.org/view.php?id=38642