1 files changed, 29 insertions, 0 deletions
diff --git a/source/blender/depsgraph/DEG_depsgraph_query.h b/source/blender/depsgraph/DEG_depsgraph_query.h
index 41650769fcf..b7ecd0544e4 100644
--- a/source/blender/depsgraph/DEG_depsgraph_query.h
+++ b/source/blender/depsgraph/DEG_depsgraph_query.h
@@ -34,6 +34,7 @@
 #define __DEG_DEPSGRAPH_QUERY_H__
 
 #include "DEG_depsgraph.h"
+#include "DEG_depsgraph_build.h"
 
 struct ID;
 
@@ -207,6 +208,34 @@ void DEG_foreach_dependent_ID(const Depsgraph *depsgraph,
 void DEG_foreach_ID(const Depsgraph *depsgraph,
                     DEGForeachIDCallback callback, void *user_data);
 
+/* ********************* DEG graph filtering ****************** */
+
+/* ComponentKey for nodes we want to be able to evaluate in the filtered graph */
+typedef struct DEG_FilterTarget {
+	struct DEG_FilterTarget *next, *prev;
+
+	struct ID *id;
+	/* TODO: component identifiers - Component Type, Subdata/Component Name */
+} DEG_FilterTarget;
+
+typedef enum eDEG_FilterQuery_Granularity {
+	DEG_FILTER_NODES_ALL           = 0,
+	DEG_FILTER_NODES_NO_OPS        = 1,
+	DEG_FILTER_NODES_ID_ONLY       = 2,
+} eDEG_FilterQuery_Granularity;
+
+
+typedef struct DEG_FilterQuery {
+	/* List of DEG_FilterTarget's */
+	struct ListBase targets;
+
+	/* Level of detail in the resulting graph */
+	eDEG_FilterQuery_Granularity detail_level;
+} DEG_FilterQuery;
+
+/* Obtain a new graph instance that only contains the subset of desired nodes */
+Depsgraph *DEG_graph_filter(const Depsgraph *depsgraph, struct Main *bmain, DEG_FilterQuery *query);
+
 
 #ifdef __cplusplus
 } /* extern "C" */