tree e925cab3407f48b40012ce360cb4dbbd5fa3a316
parent 57592798bf33a94338249a86e821f4951a553b85
author Mike Blumenkrantz <zmike@samsung.com> 1449104806 -0500
committer Jonas Ådahl <jadahl@gmail.com> 1471227931 +0800

xdg-shell: clarify xdg_surface creation semantics regarding buffers

this change ensures that the client will set its initial state
before performing any drawing, ensuring that there is no mismatch
when creating a surface with a non-default state
(eg. maximize, fullscreen, ...)

looking at the following event flows:
1) wl_surface.attach, wl_surface.commit, xdg_shell.get_xdg_surface

2) wl_surface.attach, xdg_shell.get_xdg_surface, wl_surface.commit

3) xdg_shell.get_xdg_surface, wl_surface.commit, xdg_surface.configure,
   wl_surface.attach, wl_surface.commit

only 3) is now valid, while 1) and 2) will trigger errors as a result
of handling buffers prior to creating the xdg surface

Signed-off-by: Mike Blumenkrantz <zmike@osg.samsung.com>
Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Jasper St. Pierre <jstpierre@mecheye.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>