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I'd like to create a window with transparent background and then render something onto it using OpenGL. I don't want to use the trick where whatever is behind the window is captured and then painted as a background - I want real transparency (I have composition manager running). I'm not using any GUI library (GTK, QT, ...), just raw xlib and glx.

Anyone knows how to do it?

Adam Cigánek
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  • I know this is an old thread, but one dude shows how to achieve this in [this thread](http://stackoverflow.com/a/9215724/176769), without using SDL. – karlphillip Feb 09 '12 at 17:56

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Take a look at these patches to Neverball and SDL. They seem to be based on NVidia's driver documentation.

I haven't tried it, but it looks as if you just select the correct GLX config (GLX_RGBA_BIT), clear your window appropriately, and have a compositor running, it should Just Work™.

genpfault
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