[compiz] Why does gdk_window_get_frame_extents give me different results on compiz vs. metacity?

[Karl H. Beckers]

Hi all,

I'm trying to do some window positioning for a GTK window. I compute
positions based on current window sizes and that works well under
metacity using gdk_window_get_frame_extents.

Under compiz positioning is all off, because that function yields
different results with windows decorations being the same (gnome window
decorator etc.).

With mc I get a height of 67, with compiz of 43 which very much sounds
like the height without decorations.

Is there a good reason for this to be like that? Should GDK be smarter,
or should GDK have to bother? Does compiz break a contract here?

TIA,

Karl.