How to make transparent window on linux

Question

I want to make application an application with a splash screen on Linux.

I want to use X11 and glx (OpenGL application).

I\'ve found a way to remove the bord

Answer 1

In order to have a transparent window under X11, you need

• an X11 server with composite extension
• a composite manager
• an ARGB visual for your window

You don't need to use OpenGL directly: the composite manager could use it to render the screen.

If you're going in the GTK path, have a look to

• gdk_x11_display_composite
• gdk_screen_is_composited
• gdk_display_supports_composite
• gdk_screen_get_rgba_visual
• gdk_screen_get_rgba_colormap

But you could also use Qt or another toolkit.