JPEG vs PNG, why JPEG and not PNG for getImage()

[piengeng]

Hi @johnfercher , thanks for the great work.

studying https://github.com/johnfercher/maroto/blob/master/internal/code/code.go#L86

I'm just wondering if the core could change from JPEG (DCTDecode) to PNG (FlateDecode)

google "dctdecode vs flatedecode" dctdecode is lossy, while flatedecode is lossless. for [bar/qr]code, shouldn't lossless encoding be the prefered?

My issue is about when scaling document and printing, jpeg just doesn't look as sharp. I studied my bills, some service providers are using different embed fonts to make sure barcode/qrcode is not an image, rather embed fonts, so scaling up/down is never an issue.