Thumbnails of transparent png/gif files turn black with some gd versions - need help with tests on different hosts

Cockipt uses the SimpleImage library, which has multiple issues with transparent png and gif files. The problems occur due to inconsistent libgd versions in PHP builds (bundled or libgd). Instead of changing the webhoster or writing custom workarounds for each hoster, it would be great to repair the SimpleImage library instead.

After my tests with 4 different hosts, it seems to work with the bundled gd, but not if PHP is compiled with libgd.

This is my ugly collection entries view with wrong thumbnails (host with latest libgd 2.2.5):

I wrote a simple test so Cory LaViska has a base to work with and to eliminate these issues once and for all.

So - if you can spend 10 minutes of your lifetime - copy the test repo on your host and send me a screenshot of the results, please.

See also:


I wrote an addon with a modified version of SimpleImage.

I didn’t want to revive this old topic with a new answer, but after editing the old one, it is on the top again… So now it doesn’t matter.

I wrote an addon with a modified version of SimpleImage.