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diff --git a/source/blender/blenkernel/BKE_mesh_runtime.h b/source/blender/blenkernel/BKE_mesh_runtime.h
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+++ b/source/blender/blenkernel/BKE_mesh_runtime.h
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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): Blender Foundation
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+#ifndef __BKE_MESH_RUNTIME_H__
+#define __BKE_MESH_RUNTIME_H__
+
+/** \file BKE_mesh_runtime.h
+ *  \ingroup bke
+ *
+ * This file contains access functions for the Mesh.runtime struct.
+ */
+
+#include "BKE_customdata.h"  /* for CustomDataMask */
+
+struct ColorBand;
+struct CustomData;
+struct Depsgraph;
+struct KeyBlock;
+struct Mesh;
+struct MLoop;
+struct MLoopTri;
+struct MVertTri;
+struct Object;
+struct Scene;
+
+/* Undefine to hide DerivedMesh-based function declarations */
+#define USE_DERIVEDMESH
+
+#ifdef USE_DERIVEDMESH
+struct DerivedMesh;
+#endif
+
+void BKE_mesh_runtime_reset(struct Mesh *mesh);
+int BKE_mesh_runtime_looptri_len(const struct Mesh *mesh);
+void BKE_mesh_runtime_looptri_recalc(struct Mesh *mesh);
+const struct MLoopTri *BKE_mesh_runtime_looptri_ensure(struct Mesh *mesh);
+bool BKE_mesh_runtime_ensure_edit_data(struct Mesh *mesh);
+bool BKE_mesh_runtime_clear_edit_data(struct Mesh *mesh);
+void BKE_mesh_runtime_clear_geometry(struct Mesh *mesh);
+void BKE_mesh_runtime_clear_cache(struct Mesh *mesh);
+
+void BKE_mesh_runtime_verttri_from_looptri(
+        struct MVertTri *r_verttri,
+        const struct MLoop *mloop, const struct MLoopTri *looptri, int looptri_num);
+
+/* NOTE: the functions below are defined in DerivedMesh.c, and are intended to be moved
+ * to a more suitable location when that file is removed.
+ * They should also be renamed to use conventions from BKE, not old DerivedMesh.c.
+ * For now keep the names similar to avoid confusion. */
+#ifdef USE_DERIVEDMESH
+struct DerivedMesh *mesh_get_derived_final(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct Object *ob, CustomDataMask dataMask);
+#endif
+struct Mesh *mesh_get_eval_final(
+        struct Depsgraph *depsgraph, struct Scene *scene, struct Object *ob, CustomDataMask dataMask);
+
+#ifdef USE_DERIVEDMESH
+struct DerivedMesh *mesh_get_derived_deform(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct Object *ob, CustomDataMask dataMask);
+#endif
+struct Mesh *mesh_get_eval_deform(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct Object *ob, CustomDataMask dataMask);
+
+struct Mesh *mesh_create_eval_final_render(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct Object *ob, CustomDataMask dataMask);
+
+#ifdef USE_DERIVEDMESH
+struct DerivedMesh *mesh_create_derived_index_render(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct Object *ob, CustomDataMask dataMask, int index);
+#endif
+struct Mesh *mesh_create_eval_final_index_render(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct Object *ob, CustomDataMask dataMask, int index);
+
+#ifdef USE_DERIVEDMESH
+struct DerivedMesh *mesh_create_derived_view(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct Object *ob, CustomDataMask dataMask);
+#endif
+struct Mesh *mesh_create_eval_final_view(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct Object *ob, CustomDataMask dataMask);
+
+void BKE_mesh_runtime_eval_to_meshkey(struct Mesh *me_deformed, struct Mesh *me, struct KeyBlock *kb);
+
+
+#ifndef NDEBUG
+char *BKE_mesh_runtime_debug_info(struct Mesh *me_eval);
+void BKE_mesh_runtime_debug_print(struct Mesh *me_eval);
+void BKE_mesh_runtime_debug_print_cdlayers(struct CustomData *data);
+bool BKE_mesh_runtime_is_valid(struct Mesh *me_eval);
+#endif  /* NDEBUG */
+
+#endif /* __BKE_MESH_RUNTIME_H__ */