Hi Alberts ,1)I applied your patch from https://code.launchpad.net/~albertsmuktupavels/ubuntu-themes/csd-window-shadow-and-resize-area/+merge/248349 to make csd windows re-sizable. It works, but in compiz-session it adds a black-shadow around the window ( I am aware of _GTK_FRAME_EXTENTS). Screenshot: http://i.imgur.com/PJKCsiJ.png, On Unity setting "margin: 0px" makes the black shadow disappear and windows still stays re-sizable but on flashback-compiz it doesn't.
Now according to this commit https://git.gnome.org/browse/gtk+/commit/gtk/theme/Adwaita?id=03213b9509fc1df16c66194ea168aed6c15110e9 CSD decoration should now be used under ".window-frame.solid.csd" specially without a compositor. Other third party themes like Numix (from 16.04 repo) use this and it works nice under unity, mutter, metacity with CSD windows re-sizable and without black shadow! I looked at the *window-frame* section in its code. It looks something like this: http://paste.ubuntu.com/14730825/ . I only changed border-radius to use 10px 10px 0 0. Honestly, it looks much better and doesn't really create black shadow even after using 1px margin. Screenshot: http://i.imgur.com/v7VYH6G.pngCould you please tweak it a bit (change color values, shadows etc) and incorporate that into your patch?
The only problem remains is the black-corner which could probably arises from GTK_FRAME_EXTENT or from the fix of this: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/1515561.
Does the patch at https://code.launchpad.net/~albertsmuktupavels/compiz/add-gtk-frame-extents-to-net-supported/+merge/257303 still applicable for compiz-1:0.9.12.2? Why the hold-up? The corresponding bug was marked as "Fix-Released" which makes things even more confusing.
Not sure about this....but occurs in every compiz session, Very annoying.