libweston: introduce weston_output_from_resource()
This is a simple wrapper for casting the user data of a wl_resource into
a struct weston_output pointer. Using the wrapper clearly marks all the
places where a wl_output protocol object is used.
Replace ALL wl_output related calls to wl_resource_get_user_data() with
a call to weston_output_from_resource().
v2: add type assert in weston_output_from_resource().
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Armin Krezović <krezovic.armin@gmail.com>
diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
index f1577c1..832a7b7 100644
--- a/desktop-shell/shell.c
+++ b/desktop-shell/shell.c
@@ -2941,7 +2941,7 @@
surface->committed = background_committed;
surface->committed_private = shell;
weston_surface_set_label_func(surface, background_get_label);
- surface->output = wl_resource_get_user_data(output_resource);
+ surface->output = weston_output_from_resource(output_resource);
view->output = surface->output;
weston_desktop_shell_send_configure(resource, 0,
surface_resource,
@@ -3026,7 +3026,7 @@
surface->committed = panel_committed;
surface->committed_private = shell;
weston_surface_set_label_func(surface, panel_get_label);
- surface->output = wl_resource_get_user_data(output_resource);
+ surface->output = weston_output_from_resource(output_resource);
view->output = surface->output;
weston_desktop_shell_send_configure(resource, 0,
surface_resource,