[Wayland-bugs] [Bug 729215] Please implement Wayland subsurfaces

[gtk+ (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=729215
  gtk+ | Backend: Wayland | 3.13.x

Carlos Garnacho <carlosg> changed:

           What    |Removed                     |Added
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                 CC|                            |carlosg at gnome.org

--- Comment #4 from Carlos Garnacho <carlosg at gnome.org> 2014-08-22 12:37:32 UTC ---
I'm attaching a few alternative patches that implement this as a separate
GdkWindowType. Given timing/schedule restrictions, and with an eye into fixing
bug #695504, I've taken a couple of stop-gap solutions in the patches:

- GDK_WINDOW_SUBSURFACE windows are only honored in wayland so far, other
backends will chicken out. So far every usage should be surrounded by
GDK_IS_WAYLAND_DISPLAY checks.
- these windows (ab)use the transient_for window's surface as the parent when
creating the subsurface, instead of gdk_window_get_parent(), this is purely
convenient for the time being as the most glaring cases in need for subsurfaces
in the gtk/ side are currently implemented through GTK_WINDOW_POPUP windows,
and this allows us to do the quick change by changing the window type and
setting a transient.

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