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libobs: Add functions to defer scene item update 

Allows the ability to defer updating the item transform until all
functions have been executed.
master
jp9000 2016-03-30 18:35:59 -07:00
parent 96d848f3d2
commit 0d7a969ebf
3 changed files with 24 additions and 0 deletions
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20
libobs/obs-scene.c
View File

@ -293,6 +293,9 @@ static void update_item_transform(struct obs_scene_item *item)
struct calldata params;
uint8_t stack[128];
if (os_atomic_load_long(&item->defer_update) > 0)
return;
vec2_zero(&base_origin);
vec2_zero(&origin);
@ -1573,3 +1576,20 @@ void obs_scene_atomic_update(obs_scene_t *scene,
full_unlock(scene);
obs_scene_release(scene);
}
void obs_sceneitem_defer_update_begin(obs_sceneitem_t *item)
{
if (!obs_ptr_valid(item, "obs_sceneitem_defer_update_begin"))
return;
os_atomic_inc_long(&item->defer_update);
}
void obs_sceneitem_defer_update_end(obs_sceneitem_t *item)
{
if (!obs_ptr_valid(item, "obs_sceneitem_defer_update_end"))
return;
if (os_atomic_dec_long(&item->defer_update) == 0)
update_item_transform(item);
}

1
libobs/obs-scene.h
View File

@ -35,6 +35,7 @@ struct obs_scene_item {
struct obs_scene *parent;
struct obs_source *source;
volatile long active_refs;
volatile long defer_update;
bool user_visible;
bool visible;
bool selected;

3
libobs/obs.h
View File

@ -1237,6 +1237,9 @@ EXPORT void obs_sceneitem_get_box_transform(const obs_sceneitem_t *item,
EXPORT bool obs_sceneitem_visible(const obs_sceneitem_t *item);
EXPORT bool obs_sceneitem_set_visible(obs_sceneitem_t *item, bool visible);
EXPORT void obs_sceneitem_defer_update_begin(obs_sceneitem_t *item);
EXPORT void obs_sceneitem_defer_update_end(obs_sceneitem_t *item);
/* ------------------------------------------------------------------------- */
/* Outputs */