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backend-drm: Pre-sort plane list by zpos

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Rather than constructing a zpos-sorted list every time, just have
plane_list be pre-sorted.

Signed-off-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Daniel Stone 2021-12-07 15:55:42 +00:00
parent 7ca7c14553
commit 6609840479
1 changed files with 10 additions and 2 deletions
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12
libweston/backend-drm/drm.c
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@ -760,7 +760,7 @@ init_pixman(struct drm_backend *b)
static struct drm_plane *
drm_plane_create(struct drm_backend *b, const drmModePlane *kplane)
{
struct drm_plane *plane;
struct drm_plane *plane, *tmp;
drmModeObjectProperties *props;
uint64_t *zpos_range_values;
@ -817,7 +817,15 @@ drm_plane_create(struct drm_backend *b, const drmModePlane *kplane)
goto err_props;
weston_plane_init(&plane->base, b->compositor, 0, 0);
wl_list_insert(&b->plane_list, &plane->link);
wl_list_for_each(tmp, &b->plane_list, link) {
if (tmp->zpos_max > plane->zpos_max) {
wl_list_insert(tmp->link.prev, &plane->link);
break;
}
}
if (plane->link.next == NULL)
wl_list_insert(b->plane_list.prev, &plane->link);
return plane;