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, 33 insertions, 23 deletions

diff --git a/source/blender/modifiers/intern/MOD_meshsequencecache.c b/source/blender/modifiers/intern/MOD_meshsequencecache.c
index a1ab20a6612..e95148eb6b2 100644
--- a/source/blender/modifiers/intern/MOD_meshsequencecache.c
+++ b/source/blender/modifiers/intern/MOD_meshsequencecache.c
@@ -179,27 +179,37 @@ static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphConte
 }
 
 ModifierTypeInfo modifierType_MeshSequenceCache = {
-    /* name */              "Mesh Sequence Cache",
-    /* structName */        "MeshSeqCacheModifierData",
-    /* structSize */        sizeof(MeshSeqCacheModifierData),
-    /* type */              eModifierTypeType_Constructive,
-    /* flags */             eModifierTypeFlag_AcceptsMesh |
-                            eModifierTypeFlag_AcceptsCVs,
-    /* copyData */          copyData,
-    /* deformVerts */       NULL,
-    /* deformMatrices */    NULL,
-    /* deformVertsEM */     NULL,
-    /* deformMatricesEM */  NULL,
-    /* applyModifier */     applyModifier,
-    /* applyModifierEM */   NULL,
-    /* initData */          initData,
-    /* requiredDataMask */  NULL,
-    /* freeData */          freeData,
-    /* isDisabled */        isDisabled,
-    /* updateDepsgraph */   updateDepsgraph,
-    /* dependsOnTime */     dependsOnTime,
-    /* dependsOnNormals */  NULL,
-    /* foreachObjectLink */ NULL,
-    /* foreachIDLink */     foreachIDLink,
-    /* foreachTexLink */    NULL,
+	/* name */              "Mesh Sequence Cache",
+	/* structName */        "MeshSeqCacheModifierData",
+	/* structSize */        sizeof(MeshSeqCacheModifierData),
+	/* type */              eModifierTypeType_Constructive,
+	/* flags */             eModifierTypeFlag_AcceptsMesh |
+	                        eModifierTypeFlag_AcceptsCVs,
+
+	/* copyData */          copyData,
+
+	/* deformVerts_DM */    NULL,
+	/* deformMatrices_DM */ NULL,
+	/* deformVertsEM_DM */  NULL,
+	/* deformMatricesEM_DM*/NULL,
+	/* applyModifier_DM */  applyModifier,
+	/* applyModifierEM_DM */NULL,
+
+	/* deformVerts */       NULL,
+	/* deformMatrices */    NULL,
+	/* deformVertsEM */     NULL,
+	/* deformMatricesEM */  NULL,
+	/* applyModifier */     NULL,
+	/* applyModifierEM */   NULL,
+
+	/* initData */          initData,
+	/* requiredDataMask */  NULL,
+	/* freeData */          freeData,
+	/* isDisabled */        isDisabled,
+	/* updateDepsgraph */   updateDepsgraph,
+	/* dependsOnTime */     dependsOnTime,
+	/* dependsOnNormals */  NULL,
+	/* foreachObjectLink */ NULL,
+	/* foreachIDLink */     foreachIDLink,
+	/* foreachTexLink */    NULL,
 };