Window opacity/transparency, possible?

[Lord Anton Hvornum]

I find that no one has asked the question or I'm alone in trying this.

I would like to create something similar to this:

https://i.stack.imgur.com/iTwMo.png

A transparent glClear() "window" that i can render things in with alpha channels.

GTK and TKinter has them:

http://stackoverflow.com/questions/18394597/is-there-a-way-to-create-transparent-windows-with-tkinter
http://stackoverflow.com/questions/19577367/python-how-to-make-transparent-window-with-gtk-window-but-not-with-gtk-window

And it's fully possible to create this with a C OpenGL extension, but I find very little on this on the Pyglet side of things.

I've been using Pyglet för several years now and have wanted this feature for quite a while but never gotten around to bother anyone about it, but here i am. Is it at all possible?

Best regards //Anton

[Benjamin Moran]

Hi Anton,

Pyglet is just a normal X application under Linux, wrapping xlib with ctypes. This means that it's definitely possible to do this, but there is no current high-level abstraction written in pyglet to do it.
There is a gist here that shows a C example (which you may have seen already):  https://gist.github.com/je-so/903479

From what I can tell, you need to set a few different flags in the window attributes. If you want to have a try getting it working, you can find the code in
pyglet/window/xlib/__init__.py

It would be a nice feature to have at some point, which would allow pyglet to be used for different types of on screen display projects.