Modifiers: Add wrapper functions with Mesh / DerivedMesh conversion

Makes the follow changes:

- Add new `deform*` and `apply*` function pointers to `ModifierTypeInfo` that take `Mesh`, and rename the old functions to indicate that they take `DerivedMesh`. These new functions are currently set to `NULL` for all modifiers.
- Add wrapper `modifier_deform*` and `modifier_apply*` functions in two variants: one that works with `Mesh` and the other which works with `DerivedMesh` that is named with `*_DM_depercated`. These functions check which type of data the modifier supports and converts if necessary
- Update the rest of Blender to be aware and make use of these new functions

The goal of these changes is to make it possible to port to using `Mesh` incrementally without ever needing to enter into a state where modifiers don't work. After everything has been ported over the old functions and wrappers could be removed.

Reviewers: campbellbarton, sergey, mont29

Subscribers: sybren

Tags: #bf_blender_2.8

Differential Revision: https://developer.blender.org/D3155

1 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/displist.c b/source/blender/blenkernel/intern/displist.c
index e74e540fab9..74825130b03 100644
--- a/source/blender/blenkernel/intern/displist.c
+++ b/source/blender/blenkernel/intern/displist.c
@@ -860,7 +860,7 @@ static void curve_calc_modifiers_pre(
 				deformedVerts = BKE_curve_nurbs_vertexCos_get(nurb, &numVerts);
 			}
 
-			mti->deformVerts(md, depsgraph, ob, NULL, deformedVerts, numVerts, app_flag);
+			modifier_deformVerts_DM_deprecated(md, depsgraph, ob, NULL, deformedVerts, numVerts, app_flag);
 
 			if (md == pretessellatePoint)
 				break;
@@ -969,14 +969,14 @@ static void curve_calc_modifiers_post(
 					dm->getVertCos(dm, vertCos);
 				}
 
-				mti->deformVerts(md, depsgraph, ob, dm, vertCos, totvert, appf);
+				modifier_deformVerts_DM_deprecated(md, depsgraph, ob, dm, vertCos, totvert, appf);
 			}
 			else {
 				if (!vertCos) {
 					vertCos = displist_get_allverts(dispbase, &totvert);
 				}
 
-				mti->deformVerts(md, depsgraph, ob, NULL, vertCos, totvert, appf);
+				modifier_deformVerts_DM_deprecated(md, depsgraph, ob, NULL, vertCos, totvert, appf);
 			}
 		}
 		else {