[FEATURE] Transparent (png) output for halftone QR codes.

[nitin-gyany]

Is your feature request related to a problem? Please describe. I'm trying to use a transparent image in png format. Currently the output of .WithHalftone is not transparent. So, a transparent blank image creates a black image with the QR code.

Describe the solution you'd like A transparent output QR code image is required. It should be just the QR code on a transparent background.

[yeqown]

got it, but sorry about that couldn't be fixed immediately, since I'm a little busy lately ~

[nitin-gyany]

Hi Yeqown,

Thanks for reaching out.

If you could spend just half an hour telling me where to look at, I’ll debug the issue and resolve it. Can we arrange a Google Meet some time today?

N.

On 30-Mar-2024, at 8:17 AM, yeqown @.***> wrote:

got it, but sorry about that couldn't be fixed immediately, since I'm a little busy lately ~

— Reply to this email directly, view it on GitHub https://github.com/yeqown/go-qrcode/issues/101#issuecomment-2027887949, or unsubscribe https://github.com/notifications/unsubscribe-auth/AGSE7NJWM3NQAVVNZAZHDSDY2YRSLAVCNFSM6AAAAABFOIJLM6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMRXHA4DOOJUHE. You are receiving this because you authored the thread.

[yeqown]

@nitin-gyany please try the new version of standard writer on issue/101 branch, and I also update the example of halftone. PR is here, #102

[nitin-gyany]

I’m using the latest repo. I’ll check on issue/101 branch. Somehow the transparency with small QR dots is not working. Sent from my iPhoneOn 30-Mar-2024, at 8:57 AM, yeqown @.***> wrote: @nitin-gyany please try the new version of standard writer on issue/101 branch, and I also update the example of halftone. PR is here, #102

—Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: @.***>

[nitin-gyany]

The code you committed worked with this change - options := []standard.ImageOption{ standard.WithHalftone("./transparent.png"), standard.WithQRWidth(21), standard.WithBuiltinImageEncoder(standard.PNG_FORMAT), standard.WithBgTransparent(), } filename := "./halftone-qr.png"

Thanks a lot.

Can we have following settings in our code?

1. The halftone contrast threshold - That makes the resulting halftone image with clarity.
2. The halftone QR black (module) size.

There are a couple of excellent Javascript based halftone QR generators and QR generators with image controls.

https://jsfiddle.net/lachlan/r8qWV/ https://github.com/nythrox/halftone-qrcode

I would like to hone my Golang skills in comparison with these repositories.

[yeqown]

I’m using the latest repo. I’ll check on issue/101 branch. Somehow the transparency with small QR dots is not working. 

What do you mean by 'small QR dots'? Is it a bug or something?

If these changes have fixed the issue, I would merge it and release a new version of standard writer.

[yeqown]

The code you committed worked with this change - options := []standard.ImageOption{ standard.WithHalftone("./transparent.png"), standard.WithQRWidth(21), standard.WithBuiltinImageEncoder(standard.PNG_FORMAT), standard.WithBgTransparent(), } filename := "./halftone-qr.png"

Thanks a lot.

Can we have following settings in our code?

1. The halftone contrast threshold - That makes the resulting halftone image with clarity.
2. The halftone QR black (module) size.

There are a couple of excellent Javascript based halftone QR generators and QR generators with image controls.

https://jsfiddle.net/lachlan/r8qWV/ https://github.com/nythrox/halftone-qrcode

I would like to hone my Golang skills in comparison with these repositories.

You're welcome to open PRs 👏

[nitin-gyany]

I’m using the latest repo. I’ll check on issue/101 branch. Somehow the transparency with small QR dots is not working.

What do you mean by 'small QR dots'? Is it a bug or something?

If these changes have fixed the issue, I would merge it and release a new version of standard writer.

The standard writer is working for the half tone QRs.

[yeqown]

writer/standard/v1.2.3 has been released, I'm closing this issue, free to reopen it if needed.