Modifier: skip edit-mesh conversion for armature, curve & lattice

This is an improvement over 2.7x which converted edit-mesh to mesh
(CDDM) for all 3 modifiers.

Overall this increases performance in edit-mode by around 15-20%.

1 files changed, 32 insertions, 11 deletions

diff --git a/source/blender/modifiers/intern/MOD_curve.c b/source/blender/modifiers/intern/MOD_curve.c
index b55e48f46ce..a13bb07f678 100644
--- a/source/blender/modifiers/intern/MOD_curve.c
+++ b/source/blender/modifiers/intern/MOD_curve.c
@@ -34,6 +34,7 @@
 
 #include "BKE_context.h"
 #include "BKE_curve.h"
+#include "BKE_deform.h"
 #include "BKE_editmesh.h"
 #include "BKE_lib_id.h"
 #include "BKE_lib_query.h"
@@ -129,8 +130,9 @@ static void deformVerts(ModifierData *md,
   int defgrp_index = -1;
   MOD_get_vgroup(ctx->object, mesh_src, cmd->name, &dvert, &defgrp_index);
 
-  /* silly that defaxis and BKE_curve_deform_coords are off by 1
+  /* Silly that defaxis and BKE_curve_deform_coords are off by 1
    * but leave for now to save having to call do_versions */
+
   BKE_curve_deform_coords(cmd->object,
                           ctx->object,
                           vertexCos,
@@ -147,22 +149,41 @@ static void deformVerts(ModifierData *md,
 
 static void deformVertsEM(ModifierData *md,
                           const ModifierEvalContext *ctx,
-                          struct BMEditMesh *em,
-                          Mesh *mesh,
+                          BMEditMesh *em,
+                          Mesh *UNUSED(mesh),
                           float (*vertexCos)[3],
                           int numVerts)
 {
-  Mesh *mesh_src = MOD_deform_mesh_eval_get(ctx->object, em, mesh, NULL, numVerts, false, false);
+  CurveModifierData *cmd = (CurveModifierData *)md;
+  bool use_dverts = false;
+  int defgrp_index = -1;
 
-  /* TODO(Campbell): use edit-mode data only (remove this line). */
-  if (mesh_src != NULL) {
-    BKE_mesh_wrapper_ensure_mdata(mesh_src);
+  if (ctx->object->type == OB_MESH && cmd->name[0] != '\0') {
+    defgrp_index = BKE_object_defgroup_name_index(ctx->object, cmd->name);
+    if (defgrp_index != -1) {
+      use_dverts = true;
+    }
   }
 
-  deformVerts(md, ctx, mesh_src, vertexCos, numVerts);
-
-  if (!ELEM(mesh_src, NULL, mesh)) {
-    BKE_id_free(NULL, mesh_src);
+  if (use_dverts) {
+    BKE_curve_deform_coords_with_editmesh(cmd->object,
+                                          ctx->object,
+                                          vertexCos,
+                                          numVerts,
+                                          defgrp_index,
+                                          cmd->flag,
+                                          cmd->defaxis - 1,
+                                          em);
+  }
+  else {
+    BKE_curve_deform_coords(cmd->object,
+                            ctx->object,
+                            vertexCos,
+                            numVerts,
+                            NULL,
+                            defgrp_index,
+                            cmd->flag,
+                            cmd->defaxis - 1);
   }
 }