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/libweston-desktop/xdg-shell-v5.c b/libweston-desktop/xdg-shell-v5.c
index c91c259..d7c49b1 100644
--- a/libweston-desktop/xdg-shell-v5.c
+++ b/libweston-desktop/xdg-shell-v5.c
@@ -553,7 +553,7 @@
struct weston_output *output = NULL;
if (output_resource != NULL)
- output = wl_resource_get_user_data(output_resource);
+ output = weston_output_from_resource(output_resource);
weston_desktop_xdg_surface_ensure_added(surface);
weston_desktop_api_fullscreen_requested(surface->desktop, dsurface,