Posted by gouessej on Apr 24, 2013; 8:06am
URL: https://forum.jogamp.org/PNG-interlace-tp4027479p4029012.html

asambol wrote

The PNG image doesn't have an alpha channel, but has a transparent background (it worked fine in JOGL1). Here's one example:
bar_left.png

This is wrong, I have just checked with The Gimp 2.8.4, your image has an alpha channel and the background is transparent.