Fix T65816: Alembic export of procedural mesh results in a static mesh and crashes

The static mesh issue described in T65816 has been resolved by @Sergey
in T60094.

This commit fixes the last bit of the puzzle, which was two-fold:
- A missing depsgraph update when setting `orig_object.data = new_mesh`
  from Python. Thanks @Sergey for providing the fix :)
- Properly locking the interface while exporting. This prevents crashes
  as described in T60094. The previous approach of calling
  `BKE_spacedata_draw_locks()` was not enough.

1 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/alembic/intern/alembic_capi.cc b/source/blender/alembic/intern/alembic_capi.cc
index 6547ce54a00..98e5477f2b2 100644
--- a/source/blender/alembic/intern/alembic_capi.cc
+++ b/source/blender/alembic/intern/alembic_capi.cc
@@ -222,6 +222,7 @@ static void find_iobject(const IObject &object, IObject &ret, const std::string
 struct ExportJobData {
   ViewLayer *view_layer;
   Main *bmain;
+  wmWindowManager *wm;
 
   char filename[1024];
   ExportSettings settings;
@@ -246,8 +247,7 @@ static void export_startjob(void *customdata, short *stop, short *do_update, flo
    * scene frame in separate threads
    */
   G.is_rendering = true;
-  BKE_spacedata_draw_locks(true);
-
+  WM_set_locked_interface(data->wm, true);
   G.is_break = false;
 
   DEG_graph_build_from_view_layer(
@@ -296,7 +296,7 @@ static void export_endjob(void *customdata)
   }
 
   G.is_rendering = false;
-  BKE_spacedata_draw_locks(false);
+  WM_set_locked_interface(data->wm, false);
 }
 
 bool ABC_export(Scene *scene,
@@ -310,6 +310,7 @@ bool ABC_export(Scene *scene,
 
   job->view_layer = CTX_data_view_layer(C);
   job->bmain = CTX_data_main(C);
+  job->wm = CTX_wm_manager(C);
   job->export_ok = false;
   BLI_strncpy(job->filename, filepath, 1024);