1.4.2 - batch convert - Border's Shadow incorrect size

[user0]

XnViewMP 1.4.2 64bits
Windows11 64bit (22H2), display resolution 3840x2160, win scaling 150%

Batch convert
Border's Shadow effect has incorrect size on test file

test_image.zip

(939 Bytes) Downloaded 75 times

[ckit]

Confirmed.

[winnylinny]

It appears that certain types of PNG mess up this effect?

Here's what resulted on my tests:


Works
Using random PNGs, WEBPs, and JPEGs in my personal library


Broken
Using your sample PNG image


Broken
Resaving your sample PNG image as a new PNG image


Works
Saving your sample PNG image as a WEBP or JPEG image


Works
Using the converted WEBP/JPEG image and converting it back into a PNG image


It's really weird. I couldn't figure out if there's any metadata or property of the original PNG that breaks this effect?

[winnylinny]

@user0, I think I figured it out.

After some further testing, I narrowed it down to 32-bit PNGs

The effect works fine with 24-bit PNGs.

The bug occurs if it is a 32-bit PNG.

Perhaps this effect has an issue with the extra 8-bit "transparency" (alpha) channel.

[user0]

thanks for digging it up

[xnview]

See issue for current status and some details.

[winnylinny]

Awesome, Peirre!

[xnview]

This problem is supposed to be fixed in XnView MP 1.4.3. Please check and confirm the bug fix here.

[user0]

fixed in 1.4.3