Commit https://github.com/malcolmstill/ulubis/commit/09f781fd84fc8e1836f59c24c28b231c803fd620 added screenshotting to ulubis. E.g. (this is the second screenshot out of ulubis on DRM/KMS!)  We'd like to be able to screenshot individual windows whilst retaining their alpha channels. How do we do that?
Commit 09f781f added screenshotting to ulubis.
E.g. (this is the second screenshot out of ulubis on DRM/KMS!)

We'd like to be able to screenshot individual windows whilst retaining their alpha channels.
How do we do that?