Magento2: Opacity png watermark became white box on product images

[Koc]

Preconditions

1. Magento 2.1.8
2. PHP 7.0.21

Steps to reproduce

1. Create product with jpeg images
2. Configure use transparent png watermark (attached to ticket above)
   

Expected result

1. expected image with waternark on bottom like
   

Actual result

1. got image with white box instead of nice watermark
   

Addtional info

opacity = 100% (because png has own opacity)
size=empty string
position=bottom/right

[Koc]

9662 not fixes this issue :(

[orlangur]

Did it work with JPEG anytime before?

[orlangur]

Possibly related https://stackoverflow.com/a/11681066 https://stackoverflow.com/a/38591492.

Watermark attached is PNG-8 though.

[Koc]

Did it work with JPEG anytime before?

not sure. For Magento1 I had used own small "microservice" based on Symfony and Imagine library. And it works ok, see above.

[magento-engcom-team]

@Koc Thank you for your report.
How exactly did You set up watermark? Please give parameters from Content > Design > Configuration > You website > Product Image Watermarks

[Koc]

@magento-engcom-team
opacity = 100% (because png has own opacity)
size=empty string
position=bottom/right

[magento-engcom-team]

Hi @Koc thank you for the update. We updated issue description

[Koc]

does needs update label should be removed or not?

[magento-engcom-team]

@Koc, thank you for your report.
We've created internal ticket(s) MAGETWO-75507 to track progress on the issue.

[Echron]

I will try to reproduce it and see if i can fix it

[jissereitsma]

I tried to reproduce this and can reproduce it with a cat image (PNG-8) and the GD adapter AND the ImageMagick adapter. When I encountered these issues before they actually depended on the version of GD and/or Imagick and/or PHP.

PS: I tried a transparent GIF as well and I ended up in a non-transparent watermark, so that's another fail.

[Echron]

This should be fixed by @elzekool, we tested the solution

[magento-engcom-team]

Hi @Koc. Thank you for your report.
The issue has been fixed in magento/magento2#11060 by @elzekool in 2.2-develop branch
Related commit(s):

• 92f24eccffdab3beafc0957a14f2603a5a0d0669
• 6581e80c0b125ab691d27d4b0c603552b55896ef
• f2446b637679ed7d39dd73b54c13f2bd0d3e45a6
• 519f3e1c608e0ee0105f8cec0244b822c3d17cee
• 00a5c3a2f53c5c880210157fa44648688c212070
• 503204c04627454ebe7e59e076089de640b8fe8b

The fix will be available with the upcoming patch release.

[sanderjongsma]

Looks like this bug is re-introduced in version 2.2.5, can anyone confirm this?

[chakravarthykalyan90]

We are facing similar issue in 2.2.7. Gif image transparent background is changed to black.

[janssentwh]

I am still facing this bug in 2.3.3. The alpha channel of the watermark seems to be replacing the alpha channel of the product image. This causes a box of transparency to appear around the watermark:

[vishalpatel14]

This issue still exit in latest 2.3.4 version downloaded from Magento Market place.