[Bf-blender-cvs] [aa6f0f3d1fd] master: Depsgraph: remove mesh edit-mode pointer duplication
Campbell Barton
noreply at git.blender.org
Fri May 21 08:24:05 CEST 2021
Commit: aa6f0f3d1fddb276391f384d0a69e509c927341f
Author: Campbell Barton
Date: Fri May 21 16:02:05 2021 +1000
Branches: master
https://developer.blender.org/rBaa6f0f3d1fddb276391f384d0a69e509c927341f
Depsgraph: remove mesh edit-mode pointer duplication
Share the pointer with the original mesh instead, this matches behavior
of all other objects edit-mode data.
Duplicating the edit-mesh pointer makes updates to edit-mesh require
a COPY_ON_WRITE update, which is currently an expensive operation
(copying the entire mesh).
Notes:
- This change is from 802027f3f8f9a83a77134a2b104a25ff3a4ac013
so the edit-meshes object pointer `BMEditMesh.ob` referenced the COW
version of the object. This pointer has since been removed, so the
copy is no longer needed.
- Having a separate edit-mesh pointer could be used so linked duplicates
could have their own generated meshes. For this to be supported,
many other changes would be needed: see D10920.
===================================================================
M source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc
===================================================================
diff --git a/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc b/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc
index 43bcb23a38a..e5d7bd70214 100644
--- a/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc
+++ b/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc
@@ -606,20 +606,12 @@ void update_lattice_edit_mode_pointers(const Depsgraph * /*depsgraph*/,
void update_mesh_edit_mode_pointers(const ID *id_orig, ID *id_cow)
{
- /* For meshes we need to update edit_mesh to make it to point
- * to the CoW version of object.
- *
- * This is kind of confusing, because actual bmesh is not owned by
- * the CoW object, so need to be accurate about using link from
- * edit_mesh to object. */
const Mesh *mesh_orig = (const Mesh *)id_orig;
Mesh *mesh_cow = (Mesh *)id_cow;
if (mesh_orig->edit_mesh == nullptr) {
return;
}
- mesh_cow->edit_mesh = (BMEditMesh *)MEM_dupallocN(mesh_orig->edit_mesh);
- mesh_cow->edit_mesh->mesh_eval_cage = nullptr;
- mesh_cow->edit_mesh->mesh_eval_final = nullptr;
+ mesh_cow->edit_mesh = mesh_orig->edit_mesh;
}
/* Edit data is stored and owned by original datablocks, copied ones
@@ -1001,11 +993,6 @@ void discard_lattice_edit_mode_pointers(ID *id_cow)
void discard_mesh_edit_mode_pointers(ID *id_cow)
{
Mesh *mesh_cow = (Mesh *)id_cow;
- if (mesh_cow->edit_mesh == nullptr) {
- return;
- }
- BKE_editmesh_free_derivedmesh(mesh_cow->edit_mesh);
- MEM_freeN(mesh_cow->edit_mesh);
mesh_cow->edit_mesh = nullptr;
}
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