Layers: get/update CollectionEngineSettings (depsgraph placeholder)

Every time:
  * A collection settings is set
  * A collection visibility changes
  * An object is added/removed/ ...

We need to recalculate the "accumulated" CollectionEngineSettings that
the render engine should use for an object.

This is to be handled by the depsgraph. Meanwhile this code should allow
us to start using those settings in the render engines.

Note: We are storing this in the objects, which means we can only have
one active calculated option every time.

This is intended to get the conversation with the Depsgraph department
going.

2 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/makesdna/DNA_layer_types.h b/source/blender/makesdna/DNA_layer_types.h
index 3a4293c8ad8..bd456b526c7 100644
--- a/source/blender/makesdna/DNA_layer_types.h
+++ b/source/blender/makesdna/DNA_layer_types.h
@@ -91,6 +91,7 @@ enum {
 	BASE_VISIBLED         = (1 << 1),
 	BASE_SELECTABLED      = (1 << 2),
 	BASE_FROMDUPLI        = (1 << 3),
+	BASE_DIRTY_ENGINE_SETTINGS = (1 << 4),
 };
 
 /* LayerCollection->flag */
diff --git a/source/blender/makesdna/DNA_object_types.h b/source/blender/makesdna/DNA_object_types.h
index 080ade57c0d..b92d2cd1573 100644
--- a/source/blender/makesdna/DNA_object_types.h
+++ b/source/blender/makesdna/DNA_object_types.h
@@ -46,7 +46,7 @@ struct Object;
 struct AnimData;
 struct Ipo;
 struct BoundBox;
-struct CollectionSettings;
+struct CollectionEngineSettings;
 struct Path;
 struct Material;
 struct PartDeflect;
@@ -304,7 +304,7 @@ typedef struct Object {
 
 	struct PreviewImage *preview;
 
-	struct ListBase *collection_settings; /* used by depsgraph, flushed from collection-tree */
+	struct CollectionEngineSettings *collection_settings; /* used by depsgraph, flushed from collection-tree */
 } Object;
 
 /* Warning, this is not used anymore because hooks are now modifiers */