#100 feature request: please make the displayed image mirrorable, rotateable

[Imre Péntek]

running zbarcam 0.23.92 on Ubuntu 22.04.3 LTS up-to-date
Linux af1 6.2.0-39-generic #40~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 16 10:53:04 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

I'd like to have the following (or similar) commandline flags to be added:
--mirror-vertical -- mirrors the displayed image vertically
--mirror-horizontal -- mirrors the displayed image horizontally
--rotate=degree -- rotates the displayed image by the given amount of degrees, I'd like at least multiples of 90 to be supported

reason: currently the camera image is upside down when I use zbarcam on my ultraportable machine in tent mode. my best guess is that --rotate=180 will fix this issue

thank you in advance.

[Imre Péntek]

to be clear: this feature request is about the camera image being displayed and not about the camera image being fed to whatever algorithm you use to recognize and decode qr codes/barcodes/etc