We are struggling with the watermark after upgrade to newest version of zenfoto

We have a website:

https://galerie.wirk-licht.de/

Before the upgrade (at 1.4.14) we had a working watermark.

After the upgrade all watermarks are in place but with a black/grey background.

I doublechecked the png-File with gimp. Its transparent.
I deleted all zenphoto caches via admin panel and recreated all images.
I deleted my browser cache and tried with different browsers.

Still we can not get the watermark be transparent.

Any further advice?

Kind regards,
Alex

Does your site use GD or Imagick? I sadly cannot access your site at all right now as the server seems to have a timeout…

I deleted all zenphoto caches via admin panel and recreated all images.

That is the right way although existing images actually don't change on an upgrade.

However in 1.6. or 1.6.1 - I don't remember - there have been fixes to the handling transparency which was kind of broken before.

Transparent watermarks should be PNG (png24 with alphatransparency at best).

Dang! I got it working!

I just downloaded the watermark png via filezilla.

Opend in Gimp2 and resaved it.
Options:

Interlacing (Adam7): unchecked
save background color: unchecked
save gamma-factor: unchecked
save layer offset: unchecked
save resolution: checked
save creation time: checked
save colour values from transparent pixels: unchecked
compression level: 9

Uploaded and set the new png-file as wartermark.

zenfoto Image setup:

Select graphics library: Imagick
Use embedded thumbnail: checked

cleared all caches.

so it sees to be resoved.

Thanks again!

The delay resulted in the site trying to recreate 29700 images :-)

i recogniced some strange behaviour.

Although all images were newly cached:

Just some subgalerys preview pictures still have the black/grey-background issue.

the pictures itself are fine.

You can see it here:

https://galerie.wirk-licht.de/Events-Veranstaltungen/

The delay resulted in the site trying to recreate 29700 images :-)

that would explain it, although Zenphoto will only re-create thumbs etc. on access and not automatically in the background. To force re-creation "at once" you need to use the cacheManager.

Be sure to disable random album thumb selection as ZP otherwise picks a new thumb on every access and there are a lot images it every time needs to process one. That causes delays,too.

The watermark on the link seems to be correct with transparency. I guess the browser cache is playing tricks on you.