Refactor: Unify vertex and sculpt colors into new

          color attribute system.

This commit removes sculpt colors from experimental
status and unifies it with vertex colors. It
introduces the concept of "color attributes", which
are any attributes that represents colors.  Color
attributes can be represented with byte or floating-point
numbers and can be stored in either vertices or
face corners.

Color attributes share a common namespace
(so you can no longer have a floating-point
sculpt color attribute and a byte vertex color
attribute with the same name).

Note: this commit does not include vertex paint mode,
      which is a separate patch, see:
      https://developer.blender.org/D14179

Differential Revision: https://developer.blender.org/D12587
Ref D12587

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_internal.h b/source/blender/makesrna/intern/rna_internal.h
index 0df0be07fee..ba040f88b55 100644
--- a/source/blender/makesrna/intern/rna_internal.h
+++ b/source/blender/makesrna/intern/rna_internal.h
@@ -217,6 +217,11 @@ void rna_AttributeGroup_iterator_next(CollectionPropertyIterator *iter);
 PointerRNA rna_AttributeGroup_iterator_get(CollectionPropertyIterator *iter);
 int rna_AttributeGroup_length(PointerRNA *ptr);
 
+void rna_AttributeGroup_color_iterator_begin(CollectionPropertyIterator *iter, PointerRNA *ptr);
+void rna_AttributeGroup_color_iterator_next(CollectionPropertyIterator *iter);
+PointerRNA rna_AttributeGroup_color_iterator_get(CollectionPropertyIterator *iter);
+int rna_AttributeGroup_color_length(PointerRNA *ptr);
+
 void rna_def_animdata_common(struct StructRNA *srna);
 
 bool rna_AnimaData_override_apply(struct Main *bmain,