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libweston: introduce weston_output_from_resource()

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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>
This commit is contained in:
Pekka Paalanen
2017-03-27 15:14:32 +03:00
parent 0079a949e0
commit 9ffb25009c
11 changed files with 30 additions and 11 deletions
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compositor/weston-screenshooter.c
+1 -1
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@@ -66,7 +66,7 @@ screenshooter_shoot(struct wl_client *client,
struct wl_resource *buffer_resource)
{
struct weston_output *output =
wl_resource_get_user_data(output_resource);
weston_output_from_resource(output_resource);
struct weston_buffer *buffer =
weston_buffer_from_resource(buffer_resource);