1 files changed, 59 insertions, 0 deletions
diff --git a/source/blender/blenloader/intern/versioning_dna.c b/source/blender/blenloader/intern/versioning_dna.c
new file mode 100644
index 00000000000..d379edd83f6
--- /dev/null
+++ b/source/blender/blenloader/intern/versioning_dna.c
@@ -0,0 +1,59 @@
+/*
+ * 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.
+ */
+
+/** \file \ingroup blenloader
+ *
+ * Apply edits to DNA at load time
+ * to behave as if old files were written new names.
+ */
+
+#include "BLI_compiler_attrs.h"
+#include "BLI_utildefines.h"
+
+#include "DNA_genfile.h"
+#include "DNA_listBase.h"
+
+#include "BLO_readfile.h"
+#include "readfile.h"
+
+/**
+ * Manipulates SDNA before calling #DNA_struct_get_compareflags,
+ * allowing us to rename structs and struct members.
+ *
+ * \attention Changes here will cause breakages in forward compatbility,
+ * Use this only in the _rare_ cases when migrating to new naming is needed.
+ */
+void blo_do_versions_dna(SDNA *sdna, const int versionfile, const int subversionfile)
+{
+#define DNA_VERSION_ATLEAST(ver, subver) \
+	(versionfile > (ver) || (versionfile == (ver) && (subversionfile >= (subver))))
+
+	if (!DNA_VERSION_ATLEAST(280, 2)) {
+		/* Version files created in the 'blender2.8' branch
+		 * between October 2016, and November 2017 (>=280.0 and < 280.2). */
+		if (versionfile >= 280) {
+			DNA_sdna_patch_struct(sdna, "SceneLayer", "ViewLayer");
+			DNA_sdna_patch_struct(sdna, "SceneLayerEngineData", "ViewLayerEngineData");
+			DNA_sdna_patch_struct_member(sdna, "FileGlobal", "cur_render_layer", "cur_view_layer");
+			DNA_sdna_patch_struct_member(sdna, "ParticleEditSettings", "scene_layer", "view_layer");
+			DNA_sdna_patch_struct_member(sdna, "Scene", "active_layer", "active_view_layer");
+			DNA_sdna_patch_struct_member(sdna, "Scene", "render_layers", "view_layers");
+			DNA_sdna_patch_struct_member(sdna, "WorkSpace", "render_layer", "view_layer");
+		}
+	}
+
+#undef DNA_VERSION_ATLEAST
+}