Refactor CDData masks, to have one mask per mesh elem type.

We already have different storages for cddata of verts, edges etc.,
'simply' do the same for the mask flags we use all around Blender code
to request some data, or limit some operation to some layers, etc.

Reason we need this is that some cddata types (like Normals) are
actually shared between verts/polys/loops, and we don’t want to generate
clnors everytime we request vnors!

As a side note, this also does final fix to T59338, which was the
trigger for this patch (need to request computed loop normals for
another mesh than evaluated one).

Reviewers: brecht, campbellbarton, sergey

Differential Revision: https://developer.blender.org/D4407

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/depsgraph/DEG_depsgraph_build.h b/source/blender/depsgraph/DEG_depsgraph_build.h
index 3a44c46dcc5..62315391e95 100644
--- a/source/blender/depsgraph/DEG_depsgraph_build.h
+++ b/source/blender/depsgraph/DEG_depsgraph_build.h
@@ -35,6 +35,7 @@ struct Depsgraph;
 
 struct CacheFile;
 struct Collection;
+struct CustomData_MeshMasks;
 struct EffectorWeights;
 struct ID;
 struct Main;
@@ -161,7 +162,7 @@ void DEG_add_object_pointcache_relation(struct DepsNodeHandle *node_handle,
                                         const char *description);
 
 void DEG_add_special_eval_flag(struct DepsNodeHandle *handle, struct ID *id, uint32_t flag);
-void DEG_add_customdata_mask(struct DepsNodeHandle *handle, struct Object *object, uint64_t mask);
+void DEG_add_customdata_mask(struct DepsNodeHandle *handle, struct Object *object, const struct CustomData_MeshMasks *masks);
 
 struct ID *DEG_get_id_from_handle(struct DepsNodeHandle *node_handle);
 struct Depsgraph *DEG_get_graph_from_handle(struct DepsNodeHandle *node_handle);