Mesh: Move runtime data out of DNA

This commit replaces the `Mesh_Runtime` struct embedded in `Mesh`
with `blender::bke::MeshRuntime`. This has quite a few benefits:
- It's possible to use C++ types like `std::mutex`, `Array`,
  `BitVector`, etc. more easily
- Meshes saved in files are slightly smaller
- Copying and writing meshes is a bit more obvious without
  clearing of runtime data, etc.

The first is by far the most important. It will allows us to avoid a
bunch of manual memory management boilerplate that is error-prone and
annoying. It should also simplify future CoW improvements for runtime
data.

This patch doesn't change anything besides changing `mesh.runtime.data`
to `mesh.runtime->data`. The cleanups above will happen separately.

Differential Revision: https://developer.blender.org/D16180

1 files changed, 5 insertions, 5 deletions

diff --git a/source/blender/blenkernel/intern/object.cc b/source/blender/blenkernel/intern/object.cc
index 9417d1afc7e..2d949fb5c65 100644
--- a/source/blender/blenkernel/intern/object.cc
+++ b/source/blender/blenkernel/intern/object.cc
@@ -1691,7 +1691,7 @@ static void object_update_from_subsurf_ccg(Object *object)
   if (mesh_eval == nullptr) {
     return;
   }
-  SubdivCCG *subdiv_ccg = mesh_eval->runtime.subdiv_ccg;
+  SubdivCCG *subdiv_ccg = mesh_eval->runtime->subdiv_ccg;
   if (subdiv_ccg == nullptr) {
     return;
   }
@@ -1699,7 +1699,7 @@ static void object_update_from_subsurf_ccg(Object *object)
   if (!subdiv_ccg->dirty.coords && !subdiv_ccg->dirty.hidden) {
     return;
   }
-  const int tot_level = mesh_eval->runtime.subdiv_ccg_tot_level;
+  const int tot_level = mesh_eval->runtime->subdiv_ccg_tot_level;
   Object *object_orig = DEG_get_original_object(object);
   Mesh *mesh_orig = (Mesh *)object_orig->data;
   multiresModifier_reshapeFromCCG(tot_level, mesh_orig, subdiv_ccg);
@@ -3218,7 +3218,7 @@ static void give_parvert(Object *par, int nr, float vec[3])
       int count = 0;
       int numVerts = me_eval->totvert;
 
-      if (em && me_eval->runtime.wrapper_type == ME_WRAPPER_TYPE_BMESH) {
+      if (em && me_eval->runtime->wrapper_type == ME_WRAPPER_TYPE_BMESH) {
         numVerts = em->bm->totvert;
         if (em->bm->elem_table_dirty & BM_VERT) {
 #ifdef VPARENT_THREADING_HACK
@@ -3233,8 +3233,8 @@ static void give_parvert(Object *par, int nr, float vec[3])
 #endif
         }
         if (nr < numVerts) {
-          if (me_eval && me_eval->runtime.edit_data && me_eval->runtime.edit_data->vertexCos) {
-            add_v3_v3(vec, me_eval->runtime.edit_data->vertexCos[nr]);
+          if (me_eval && me_eval->runtime->edit_data && me_eval->runtime->edit_data->vertexCos) {
+            add_v3_v3(vec, me_eval->runtime->edit_data->vertexCos[nr]);
           }
           else {
             const BMVert *v = BM_vert_at_index(em->bm, nr);