Util function to create CollectionEngineSettings

This may be run by Depsgraph, as well as internal layercollection create routines

2 files changed, 30 insertions, 9 deletions

diff --git a/source/blender/blenkernel/BKE_layer.h b/source/blender/blenkernel/BKE_layer.h
index 3253c1e5e29..e796ef93fda 100644
--- a/source/blender/blenkernel/BKE_layer.h
+++ b/source/blender/blenkernel/BKE_layer.h
@@ -99,6 +99,7 @@ typedef void (*CollectionEngineSettingsCB)(struct RenderEngine *engine, struct C
 struct CollectionEngineSettings *BKE_layer_collection_engine_get(struct LayerCollection *lc, const char *engine_name);
 void BKE_layer_collection_engine_settings_callback_register(struct Main *bmain, const char *engine_name, CollectionEngineSettingsCB func);
 void BKE_layer_collection_engine_settings_callback_free(void);
+void BKE_layer_collection_engine_settings_create(struct ListBase *lb, const char *engine_name);
 void BKE_layer_collection_engine_settings_free(struct ListBase *lb);
 
 void BKE_collection_engine_property_add_float(struct CollectionEngineSettings *ces, const char *name, float value);
diff --git a/source/blender/blenkernel/intern/layer.c b/source/blender/blenkernel/intern/layer.c
index d64a2ba585e..4b28eb99f07 100644
--- a/source/blender/blenkernel/intern/layer.c
+++ b/source/blender/blenkernel/intern/layer.c
@@ -45,11 +45,13 @@
 #include "MEM_guardedalloc.h"
 
 /* prototype */
+struct CollectionEngineSettingsCB_Type;
 static void layer_collection_free(SceneLayer *sl, LayerCollection *lc);
 static LayerCollection *layer_collection_add(SceneLayer *sl, ListBase *lb, SceneCollection *sc);
 static LayerCollection *find_layer_collection_by_scene_collection(LayerCollection *lc, const SceneCollection *sc);
-static void object_bases_Iterator_next(Iterator *iter, const int flag);
+static void collection_engine_settings_create(ListBase *lb, struct CollectionEngineSettingsCB_Type *ces_type);
 static void layer_collection_create_engine_settings(LayerCollection *lc);
+static void object_bases_Iterator_next(Iterator *iter, const int flag);
 
 /* RenderLayer */
 
@@ -596,20 +598,13 @@ typedef struct CollectionEngineSettingsCB_Type {
 
 } CollectionEngineSettingsCB_Type;
 
-
 static void create_engine_settings_layer_collection(LayerCollection *lc, CollectionEngineSettingsCB_Type *ces_type)
 {
 	if (BKE_layer_collection_engine_get(lc, ces_type->name)) {
 		return;
 	}
 
-	/* create callback data */
-	CollectionEngineSettings *ces = MEM_callocN(sizeof(CollectionEngineSettings), "Collection Engine Settings");
-	BLI_strncpy_utf8(ces->name, ces_type->name, sizeof(ces->name));
-	BLI_addtail(&lc->engine_settings, ces);
-
-	/* call callback */
-	ces_type->callback(NULL, ces);
+	collection_engine_settings_create(&lc->engine_settings, ces_type);
 
 	for (LayerCollection *lcn = lc->layer_collections.first; lcn; lcn = lcn->next) {
 		create_engine_settings_layer_collection(lcn, ces_type);
@@ -656,6 +651,31 @@ void BKE_layer_collection_engine_settings_callback_free(void)
 	BLI_freelistN(&R_engines_settings_callbacks);
 }
 
+static void collection_engine_settings_create(ListBase *lb, CollectionEngineSettingsCB_Type *ces_type)
+{
+	/* create callback data */
+	CollectionEngineSettings *ces = MEM_callocN(sizeof(CollectionEngineSettings), "Collection Engine Settings");
+	BLI_strncpy_utf8(ces->name, ces_type->name, sizeof(ces->name));
+	BLI_addtail(lb, ces);
+
+	/* call callback */
+	ces_type->callback(NULL, ces);
+}
+
+/**
+ * Initialize a CollectionEngineSettings
+ *
+ * Usually we would pass LayerCollection->engine_settings
+ * But depsgraph uses this for Object->collection_settings
+ */
+void BKE_layer_collection_engine_settings_create(ListBase *lb, const char *engine_name)
+{
+	CollectionEngineSettingsCB_Type *ces_type;
+	ces_type = BLI_findstring(&R_engines_settings_callbacks, engine_name, offsetof(CollectionEngineSettingsCB_Type, name));
+	BLI_assert(ces_type);
+	collection_engine_settings_create(lb, ces_type);
+}
+
 /**
  * Free the CollectionEngineSettings ListBase
  *