1 files changed, 48 insertions, 5 deletions

diff --git a/source/blender/editors/mesh/mesh_data.c b/source/blender/editors/mesh/mesh_data.c
index 772bb1bd308..84d2ac3cef1 100644
--- a/source/blender/editors/mesh/mesh_data.c
+++ b/source/blender/editors/mesh/mesh_data.c
@@ -252,7 +252,7 @@ void ED_mesh_uv_loop_reset(struct bContext *C, struct Mesh *me)
 {
 	/* could be ldata or pdata */
 	CustomData *pdata = GET_CD_DATA(me, pdata);
-	const int layernum = CustomData_get_active_layer_index(pdata, CD_MTEXPOLY);
+	const int layernum = CustomData_get_active_layer(pdata, CD_MTEXPOLY);
 	ED_mesh_uv_loop_reset_ex(me, layernum);
 	
 	WM_event_add_notifier(C, NC_GEOM | ND_DATA, me);
@@ -464,6 +464,20 @@ int ED_mesh_color_add(Mesh *me, const char *name, const bool active_set)
 	return layernum;
 }
 
+bool ED_mesh_color_ensure(struct Mesh *me, const char *name)
+{
+	BLI_assert(me->edit_btmesh == NULL);
+
+	if (!me->mloopcol && me->totloop) {
+		CustomData_add_layer_named(&me->ldata, CD_MLOOPCOL, CD_DEFAULT, NULL, me->totloop, name);
+		BKE_mesh_update_customdata_pointers(me, true);
+	}
+
+	DAG_id_tag_update(&me->id, 0);
+
+	return (me->mloopcol != NULL);
+}
+
 bool ED_mesh_color_remove_index(Mesh *me, const int n)
 {
 	CustomData *ldata = GET_CD_DATA(me, ldata);
@@ -511,7 +525,7 @@ static int layers_poll(bContext *C)
 {
 	Object *ob = ED_object_context(C);
 	ID *data = (ob) ? ob->data : NULL;
-	return (ob && !ID_IS_LINKED_DATABLOCK(ob) && ob->type == OB_MESH && data && !ID_IS_LINKED_DATABLOCK(data));
+	return (ob && !ID_IS_LINKED(ob) && ob->type == OB_MESH && data && !ID_IS_LINKED(data));
 }
 
 static int mesh_uv_texture_add_exec(bContext *C, wmOperator *UNUSED(op))
@@ -582,7 +596,7 @@ static int drop_named_image_invoke(bContext *C, wmOperator *op, const wmEvent *e
 	obedit = base->object;
 	me = obedit->data;
 	if (me->edit_btmesh == NULL) {
-		EDBM_mesh_make(scene->toolsettings, obedit, false);
+		EDBM_mesh_make(obedit, scene->toolsettings->selectmode, false);
 		exitmode = 1;
 	}
 	if (me->edit_btmesh == NULL)
@@ -759,7 +773,7 @@ static int mesh_customdata_mask_clear_poll(bContext *C)
 			return false;
 		}
 
-		if (!ID_IS_LINKED_DATABLOCK(me)) {
+		if (!ID_IS_LINKED(me)) {
 			CustomData *data = GET_CD_DATA(me, vdata);
 			if (CustomData_has_layer(data, CD_PAINT_MASK)) {
 				return true;
@@ -813,7 +827,7 @@ static int mesh_customdata_skin_state(bContext *C)
 
 	if (ob && ob->type == OB_MESH) {
 		Mesh *me = ob->data;
-		if (!ID_IS_LINKED_DATABLOCK(me)) {
+		if (!ID_IS_LINKED(me)) {
 			CustomData *data = GET_CD_DATA(me, vdata);
 			return CustomData_has_layer(data, CD_MVERT_SKIN);
 		}
@@ -889,9 +903,38 @@ static int mesh_customdata_custom_splitnormals_add_exec(bContext *C, wmOperator
 		CustomData *data = GET_CD_DATA(me, ldata);
 
 		if (me->edit_btmesh) {
+			/* Tag edges as sharp according to smooth threshold if needed, to preserve autosmooth shading. */
+			if (me->flag & ME_AUTOSMOOTH) {
+				BM_edges_sharp_from_angle_set(me->edit_btmesh->bm, me->smoothresh);
+
+				me->drawflag |= ME_DRAWSHARP;
+			}
+
 			BM_data_layer_add(me->edit_btmesh->bm, data, CD_CUSTOMLOOPNORMAL);
 		}
 		else {
+			/* Tag edges as sharp according to smooth threshold if needed, to preserve autosmooth shading. */
+			if (me->flag & ME_AUTOSMOOTH) {
+				float (*polynors)[3] = MEM_mallocN(sizeof(*polynors) * (size_t)me->totpoly, __func__);
+
+				BKE_mesh_calc_normals_poly(
+				            me->mvert, NULL, me->totvert,
+				            me->mloop, me->mpoly,
+				            me->totloop, me->totpoly,
+				            polynors, true);
+
+				BKE_edges_sharp_from_angle_set(
+				            me->mvert, me->totvert,
+				            me->medge, me->totedge,
+				            me->mloop, me->totloop,
+				            me->mpoly, polynors, me->totpoly,
+				            me->smoothresh);
+
+				MEM_freeN(polynors);
+
+				me->drawflag |= ME_DRAWSHARP;
+			}
+
 			CustomData_add_layer(data, CD_CUSTOMLOOPNORMAL, CD_DEFAULT, NULL, me->totloop);
 		}