Depsgraph: store mode and time in depsgraph, add view layer / scene accessors.

Scene, view layer and mode are now set in the constructor and never changed.
Time is updated on frame changes to indicate which frame is being or has been
evaluated last.

This is a step towards making EvaluationContext obsolete.

Differential Revision: https://developer.blender.org/D3144

1 files changed, 16 insertions, 0 deletions

diff --git a/source/blender/depsgraph/DEG_depsgraph_query.h b/source/blender/depsgraph/DEG_depsgraph_query.h
index 8600022b7c3..ceba87338a0 100644
--- a/source/blender/depsgraph/DEG_depsgraph_query.h
+++ b/source/blender/depsgraph/DEG_depsgraph_query.h
@@ -49,6 +49,22 @@ struct ViewLayer;
 extern "C" {
 #endif
 
+/* *********************** DEG input data ********************* */
+
+/* Get scene that depsgraph was built for. */
+struct Scene *DEG_get_input_scene(const Depsgraph *graph);
+
+/* Get view layer that depsgraph was built for. */
+struct ViewLayer *DEG_get_input_view_layer(const Depsgraph *graph);
+
+/* Get evaluation mode that depsgraph was built for. */
+eEvaluationMode DEG_get_mode(const Depsgraph *graph);
+
+/* Get time that depsgraph is being evaluated or was last evaluated at. */
+float DEG_get_ctime(const Depsgraph *graph);
+
+/* ********************* DEG evaluated data ******************* */
+
 /* Check if given ID type was tagged for update. */
 bool DEG_id_type_tagged(struct Main *bmain, short id_type);