compiz team mailing list archive

[Alberts Muktupāvels <1436553@xxxxxxxxxxxxxxxxxx>]

1) What code was removed?

2) GTK+ 3.16 or newer requires that window manager explicitly advertises
that it does support _GTK_FRAME_EXTENTS. If it does not do that then
GTK+ thinks that CSD is not supported. This is why windows windows looks
like they are running without compositing manager.

It is not GTK+ that does not recognize compoz as compositor - simply
compiz does not say - hey I do support _GTK_FRAME_EXTENTS.

It could be "fixed" by adding _GTK_FRAME_EXTENTS to _NET_SUPPORTED - see
my branch. But problem is that compiz really does not support
_GTK_FRAME_EXTENTS so adding it to _NET_SUPPORTED is wrong.

If it would be enabled then using theme that has .window-frame { margin:
..; box-shadow: ...; } (Adwaita as example) then if you would tile csd
window to left or right side of screen then it would not look tiled -
there would empty space around window.

Basically missing _GTK_FRAME_EXTENTS support is reason why:
1) Ambiance theme does not add .window-frame { margin: ...; }
1) GTK+ is patched with 0001-gtkwindow-set-transparent-background-color.patch and unity_rbga_tooltips.patch.

If csd window is used without compositor and theme does not has fallback
style .solid-csd then rounded corners will be black - color that is set
by 0001-gtkwindow-set-transparent-background-color.patch.

-- 
You received this bug notification because you are a member of compiz
packagers, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/1436553

Title:
  Transparent windows render black with Gtk3.16 and compiz

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subscriptions