Cleanup: Move mesh legacy conversion to a separate file

It's helpful to make the separation of legacy data formats explicit,
because it declutters actively changed code and makes it clear which
areas do not follow Blender's current design. In this case I separated
the `MFace`/"tessface" conversion code into a separate blenkernel
.cc file and header. This also makes refactoring to remove these
functions simpler because they're easier to find.

In the future, conversions to the `MLoopUV` type and `MVert`
can be implemented here for the same reasons (see T95965).

Differential Revision: https://developer.blender.org/D15396

1 files changed, 1 insertions, 23 deletions

diff --git a/source/blender/blenkernel/BKE_customdata.h b/source/blender/blenkernel/BKE_customdata.h
index a1101c1df44..010fbb27172 100644
--- a/source/blender/blenkernel/BKE_customdata.h
+++ b/source/blender/blenkernel/BKE_customdata.h
@@ -550,33 +550,11 @@ void CustomData_validate_layer_name(const struct CustomData *data,
  */
 bool CustomData_verify_versions(struct CustomData *data, int index);
 
-/* BMesh specific custom-data stuff.
- *
- * Needed to convert to/from different face representation (for versioning). */
+/* BMesh specific custom-data stuff. */
 
-void CustomData_to_bmeshpoly(struct CustomData *fdata, struct CustomData *ldata, int totloop);
-void CustomData_from_bmeshpoly(struct CustomData *fdata, struct CustomData *ldata, int total);
 void CustomData_bmesh_update_active_layers(struct CustomData *fdata, struct CustomData *ldata);
-/**
- * Update active indices for active/render/clone/stencil custom data layers
- * based on indices from fdata layers
- * used by do_versions in `readfile.c` when creating pdata and ldata for pre-bmesh
- * meshes and needed to preserve active/render/clone/stencil flags set in pre-bmesh files.
- */
-void CustomData_bmesh_do_versions_update_active_layers(struct CustomData *fdata,
-                                                       struct CustomData *ldata);
 void CustomData_bmesh_init_pool(struct CustomData *data, int totelem, char htype);
 
-#ifndef NDEBUG
-/**
- * Debug check, used to assert when we expect layers to be in/out of sync.
- *
- * \param fallback: Use when there are no layers to handle,
- * since callers may expect success or failure.
- */
-bool CustomData_from_bmeshpoly_test(CustomData *fdata, CustomData *ldata, bool fallback);
-#endif
-
 /**
  * Validate and fix data of \a layer,
  * if possible (needs relevant callback in layer's type to be defined).