1 files changed, 91 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/mesh_legacy_convert.cc b/source/blender/blenkernel/intern/mesh_legacy_convert.cc
index 479dd6a012a..04c1850f4ae 100644
--- a/source/blender/blenkernel/intern/mesh_legacy_convert.cc
+++ b/source/blender/blenkernel/intern/mesh_legacy_convert.cc
@@ -7,7 +7,7 @@
  * Functions to convert mesh data to and from legacy formats like #MFace.
  */
 
-// #include <climits>
+#define DNA_DEPRECATED_ALLOW
 
 #include "MEM_guardedalloc.h"
 
@@ -18,8 +18,10 @@
 #include "BLI_math.h"
 #include "BLI_memarena.h"
 #include "BLI_polyfill_2d.h"
+#include "BLI_task.hh"
 #include "BLI_utildefines.h"
 
+#include "BKE_attribute.hh"
 #include "BKE_customdata.h"
 #include "BKE_mesh.h"
 #include "BKE_mesh_legacy_convert.h"
@@ -874,3 +876,91 @@ void BKE_mesh_add_mface_layers(CustomData *fdata, CustomData *ldata, int total)
 }
 
 /** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Hide Attribute and Legacy Flag Conversion
+ * \{ */
+
+void BKE_mesh_legacy_convert_hide_layers_to_flags(Mesh *mesh)
+{
+  using namespace blender;
+  using namespace blender::bke;
+  const AttributeAccessor attributes = mesh_attributes(*mesh);
+
+  MutableSpan<MVert> vertices(mesh->mvert, mesh->totvert);
+  const VArray<bool> hide_vert = attributes.lookup_or_default<bool>(
+      ".hide_vert", ATTR_DOMAIN_POINT, false);
+  threading::parallel_for(vertices.index_range(), 4096, [&](IndexRange range) {
+    for (const int i : range) {
+      SET_FLAG_FROM_TEST(vertices[i].flag, hide_vert[i], ME_HIDE);
+    }
+  });
+
+  MutableSpan<MEdge> edges(mesh->medge, mesh->totedge);
+  const VArray<bool> hide_edge = attributes.lookup_or_default<bool>(
+      ".hide_edge", ATTR_DOMAIN_EDGE, false);
+  threading::parallel_for(edges.index_range(), 4096, [&](IndexRange range) {
+    for (const int i : range) {
+      SET_FLAG_FROM_TEST(edges[i].flag, hide_edge[i], ME_HIDE);
+    }
+  });
+
+  MutableSpan<MPoly> polygons(mesh->mpoly, mesh->totpoly);
+  const VArray<bool> hide_face = attributes.lookup_or_default<bool>(
+      ".hide_poly", ATTR_DOMAIN_FACE, false);
+  threading::parallel_for(polygons.index_range(), 4096, [&](IndexRange range) {
+    for (const int i : range) {
+      SET_FLAG_FROM_TEST(polygons[i].flag, hide_face[i], ME_HIDE);
+    }
+  });
+}
+
+void BKE_mesh_legacy_convert_flags_to_hide_layers(Mesh *mesh)
+{
+  using namespace blender;
+  using namespace blender::bke;
+  MutableAttributeAccessor attributes = mesh_attributes_for_write(*mesh);
+
+  const Span<MVert> vertices(mesh->mvert, mesh->totvert);
+  if (std::any_of(vertices.begin(), vertices.end(), [](const MVert &vert) {
+        return vert.flag & ME_HIDE;
+      })) {
+    SpanAttributeWriter<bool> hide_vert = attributes.lookup_or_add_for_write_only_span<bool>(
+        ".hide_vert", ATTR_DOMAIN_POINT);
+    threading::parallel_for(vertices.index_range(), 4096, [&](IndexRange range) {
+      for (const int i : range) {
+        hide_vert.span[i] = vertices[i].flag & ME_HIDE;
+      }
+    });
+    hide_vert.finish();
+  }
+
+  const Span<MEdge> edges(mesh->medge, mesh->totedge);
+  if (std::any_of(
+          edges.begin(), edges.end(), [](const MEdge &edge) { return edge.flag & ME_HIDE; })) {
+    SpanAttributeWriter<bool> hide_edge = attributes.lookup_or_add_for_write_only_span<bool>(
+        ".hide_edge", ATTR_DOMAIN_EDGE);
+    threading::parallel_for(edges.index_range(), 4096, [&](IndexRange range) {
+      for (const int i : range) {
+        hide_edge.span[i] = edges[i].flag & ME_HIDE;
+      }
+    });
+    hide_edge.finish();
+  }
+
+  const Span<MPoly> polygons(mesh->mpoly, mesh->totpoly);
+  if (std::any_of(polygons.begin(), polygons.end(), [](const MPoly &poly) {
+        return poly.flag & ME_HIDE;
+      })) {
+    SpanAttributeWriter<bool> hide_face = attributes.lookup_or_add_for_write_only_span<bool>(
+        ".hide_poly", ATTR_DOMAIN_FACE);
+    threading::parallel_for(polygons.index_range(), 4096, [&](IndexRange range) {
+      for (const int i : range) {
+        hide_face.span[i] = polygons[i].flag & ME_HIDE;
+      }
+    });
+    hide_face.finish();
+  }
+}
+
+/** \} */