EditMesh: Avoid creating deform-vert layer every redraw

Getting a new edit-derived-bmesh was always creating a deform-vert array, even when it wasn't needed.
Since this was called on redraw, in many cases it was doing it unnecessarily.

Now pass in a custom-data mask and only fill in deform-verts when needed.

Gives noticeable drawing speedup (~10-30% here).

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenkernel/BKE_DerivedMesh.h b/source/blender/blenkernel/BKE_DerivedMesh.h
index 8ccc4a6eb0e..606488f85cc 100644
--- a/source/blender/blenkernel/BKE_DerivedMesh.h
+++ b/source/blender/blenkernel/BKE_DerivedMesh.h
@@ -694,7 +694,7 @@ DerivedMesh *mesh_create_derived_render(
         CustomDataMask dataMask);
 
 DerivedMesh *getEditDerivedBMesh(
-        struct BMEditMesh *em, struct Object *ob,
+        struct BMEditMesh *em, struct Object *ob, CustomDataMask data_mask,
         float (*vertexCos)[3]);
 
 DerivedMesh *mesh_create_derived_index_render(
@@ -723,7 +723,7 @@ DerivedMesh *mesh_create_derived_physics(
         CustomDataMask dataMask);
 
 DerivedMesh *editbmesh_get_derived_base(
-        struct Object *, struct BMEditMesh *em);
+        struct Object *ob, struct BMEditMesh *em, CustomDataMask data_mask);
 DerivedMesh *editbmesh_get_derived_cage(
         struct Scene *scene, struct Object *,
         struct BMEditMesh *em, CustomDataMask dataMask);