Merge branch 'master' into wm-drag-drop-rewritewm-drag-drop-rewrite

1 files changed, 166 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/mesh_wrapper.c b/source/blender/blenkernel/intern/mesh_wrapper.c
new file mode 100644
index 00000000000..f073feffedc
--- /dev/null
+++ b/source/blender/blenkernel/intern/mesh_wrapper.c
@@ -0,0 +1,166 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/** \file
+ * \ingroup bke
+ *
+ * The primary purpose of this API is to avoid unnecessary mesh conversion for the final
+ * output of a modified mesh.
+ *
+ * This API handles the case when the modifier stack outputs a mesh which does not have
+ * #Mesh data (#MPoly, #MLoop, #MEdge, #MVert).
+ * Currently this is used so the resulting mesh can have #BMEditMesh data,
+ * postponing the converting until it's needed or avoiding conversion entirely
+ * which can be an expensive operation.
+ * Once converted, the meshes type changes to #ME_WRAPPER_TYPE_MDATA,
+ * although the edit mesh is not cleared.
+ *
+ * This API exposes functions that abstract over the different kinds of internal data,
+ * as well as supporting converting the mesh into regular mesh.
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "DNA_defaults.h"
+#include "DNA_key_types.h"
+#include "DNA_mesh_types.h"
+#include "DNA_meshdata_types.h"
+#include "DNA_object_types.h"
+
+#include "BLI_bitmap.h"
+#include "BLI_edgehash.h"
+#include "BLI_ghash.h"
+#include "BLI_hash.h"
+#include "BLI_linklist.h"
+#include "BLI_math.h"
+#include "BLI_memarena.h"
+#include "BLI_string.h"
+#include "BLI_utildefines.h"
+
+#include "BLT_translation.h"
+
+#include "BKE_animsys.h"
+#include "BKE_editmesh.h"
+#include "BKE_editmesh_cache.h"
+#include "BKE_global.h"
+#include "BKE_idtype.h"
+#include "BKE_key.h"
+#include "BKE_lib_id.h"
+#include "BKE_main.h"
+#include "BKE_material.h"
+#include "BKE_mesh.h"
+#include "BKE_mesh_runtime.h"
+#include "BKE_modifier.h"
+#include "BKE_multires.h"
+#include "BKE_object.h"
+
+#include "PIL_time.h"
+
+#include "DEG_depsgraph.h"
+#include "DEG_depsgraph_query.h"
+
+Mesh *BKE_mesh_wrapper_from_editmesh_with_coords(BMEditMesh *em,
+                                                 const CustomData_MeshMasks *cd_mask_extra,
+                                                 float (*vertexCos)[3],
+                                                 const Mesh *me_settings)
+{
+  Mesh *me = BKE_id_new_nomain(ID_ME, NULL);
+  BKE_mesh_copy_settings(me, me_settings);
+  BKE_mesh_runtime_ensure_edit_data(me);
+
+  me->runtime.wrapper_type = ME_WRAPPER_TYPE_BMESH;
+  if (cd_mask_extra) {
+    me->runtime.cd_mask_extra = *cd_mask_extra;
+  }
+
+  /* Use edit-mesh directly where possible. */
+  me->runtime.is_original = true;
+  me->edit_mesh = MEM_dupallocN(em);
+
+/* Make sure, we crash if these are ever used. */
+#ifdef DEBUG
+  me->totvert = INT_MAX;
+  me->totedge = INT_MAX;
+  me->totpoly = INT_MAX;
+  me->totloop = INT_MAX;
+#else
+  me->totvert = 0;
+  me->totedge = 0;
+  me->totpoly = 0;
+  me->totloop = 0;
+#endif
+
+  EditMeshData *edit_data = me->runtime.edit_data;
+  edit_data->vertexCos = vertexCos;
+  return me;
+}
+
+Mesh *BKE_mesh_wrapper_from_editmesh(BMEditMesh *em,
+                                     const CustomData_MeshMasks *cd_mask_extra,
+                                     const Mesh *me_settings)
+{
+  return BKE_mesh_wrapper_from_editmesh_with_coords(em, cd_mask_extra, NULL, me_settings);
+}
+
+void BKE_mesh_wrapper_ensure_mdata(Mesh *me)
+{
+  if (me->runtime.wrapper_type == ME_WRAPPER_TYPE_MDATA) {
+    return;
+  }
+  const eMeshWrapperType geom_type_orig = me->runtime.wrapper_type;
+  me->runtime.wrapper_type = ME_WRAPPER_TYPE_MDATA;
+
+  switch (geom_type_orig) {
+    case ME_WRAPPER_TYPE_MDATA: {
+      break; /* Quiet warning. */
+    }
+    case ME_WRAPPER_TYPE_BMESH: {
+      me->totvert = 0;
+      me->totedge = 0;
+      me->totpoly = 0;
+      me->totloop = 0;
+
+      BLI_assert(me->edit_mesh != NULL);
+      BLI_assert(me->runtime.edit_data != NULL);
+
+      BMEditMesh *em = me->edit_mesh;
+      BM_mesh_bm_to_me_for_eval(em->bm, me, &me->runtime.cd_mask_extra);
+
+      EditMeshData *edit_data = me->runtime.edit_data;
+      if (edit_data->vertexCos) {
+        BKE_mesh_vert_coords_apply(me, edit_data->vertexCos);
+        me->runtime.is_original = false;
+      }
+      break;
+    }
+  }
+
+  if (me->runtime.wrapper_type_finalize) {
+    BKE_mesh_wrapper_deferred_finalize(me, &me->runtime.cd_mask_extra);
+  }
+}
+
+bool BKE_mesh_wrapper_minmax(const Mesh *me, float min[3], float max[3])
+{
+  switch ((eMeshWrapperType)me->runtime.wrapper_type) {
+    case ME_WRAPPER_TYPE_BMESH:
+      return BKE_editmesh_cache_calc_minmax(me->edit_mesh, me->runtime.edit_data, min, max);
+    case ME_WRAPPER_TYPE_MDATA:
+      return BKE_mesh_minmax(me, min, max);
+  }
+  BLI_assert(0);
+  return false;
+}