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libweston: add API to find weston output by head serial

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Add new API weston_compositor_find_output_by_head_serial for touch
binding.

Signed-off-by: liang zhou <liang.zhou@gehealthcare.com>
This commit is contained in:
liang zhou 2026-05-15 13:51:59 +08:00 • committed by liang zhou
parent edce1fea4b
commit 3427788c40
2 changed files with 30 additions and 0 deletions
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4
include/libweston/libweston.h
View file

@ -2936,6 +2936,10 @@ weston_compositor_get_touch_devices(struct weston_compositor *compositor);
void
weston_touch_device_list_release(struct weston_touch_device_list *list);
struct weston_output *
weston_compositor_find_output_by_head_serial(struct weston_compositor *compositor,
const char *serial);
#ifdef __cplusplus
}
#endif

26
libweston/compositor.c
View file

@ -11324,3 +11324,29 @@ weston_touch_device_list_release(struct weston_touch_device_list *list)
list->len = 0;
list->array = NULL;
}
/**
* Find an output by its head serial number
* \param compositor Weston compositor object
* \param serial Serial number of the head
* \return Output; NULL if not found
*
* \ingroup compositor
*/
WL_EXPORT struct weston_output *
weston_compositor_find_output_by_head_serial(struct weston_compositor *compositor,
const char *serial)
{
struct weston_output *output;
struct weston_head *head;
/* Check active outputs */
wl_list_for_each(output, &compositor->output_list, link) {
wl_list_for_each(head, &output->head_list, output_link) {
if (head->serial_number && strcmp(head->serial_number, serial) == 0)
return output;
}
}
return NULL;
}