1 files changed, 31 insertions, 0 deletions
diff --git a/source/blender/blenkernel/BKE_attribute.hh b/source/blender/blenkernel/BKE_attribute.hh
index 4aa6c133e9e..fbdacee139c 100644
--- a/source/blender/blenkernel/BKE_attribute.hh
+++ b/source/blender/blenkernel/BKE_attribute.hh
@@ -553,6 +553,11 @@ class MutableAttributeAccessor : public AttributeAccessor {
   GAttributeWriter lookup_for_write(const AttributeIDRef &attribute_id);
 
   /**
+   * Same as above, but returns a type that makes it easier to work with the attribute as a span.
+   */
+  GSpanAttributeWriter lookup_for_write_span(const AttributeIDRef &attribute_id);
+
+  /**
    * Get a writable attribute or non if it does not exist.
    * Make sure to call #finish after changes are done.
    */
@@ -569,6 +574,19 @@ class MutableAttributeAccessor : public AttributeAccessor {
   }
 
   /**
+   * Same as above, but returns a type that makes it easier to work with the attribute as a span.
+   */
+  template<typename T>
+  SpanAttributeWriter<T> lookup_for_write_span(const AttributeIDRef &attribute_id)
+  {
+    AttributeWriter<T> attribute = this->lookup_for_write<T>(attribute_id);
+    if (attribute) {
+      return SpanAttributeWriter<T>{std::move(attribute), true};
+    }
+    return {};
+  }
+
+  /**
    * Create a new attribute.
    * \return True, when a new attribute has been created. False, when it's not possible to create
    * this attribute or there is already an attribute with that id.
@@ -692,6 +710,19 @@ Vector<AttributeTransferData> retrieve_attributes_for_transfer(
     eAttrDomainMask domain_mask,
     const Set<std::string> &skip = {});
 
+/**
+ * Copy attributes for the domain based on the elementwise mask.
+ *
+ * \param mask_indices: Indexed elements to copy from the source data-block.
+ * \param domain: Attribute domain to transfer.
+ * \param skip: Named attributes to ignore/skip.
+ */
+void copy_attribute_domain(AttributeAccessor src_attributes,
+                           MutableAttributeAccessor dst_attributes,
+                           IndexMask selection,
+                           eAttrDomain domain,
+                           const Set<std::string> &skip = {});
+
 bool allow_procedural_attribute_access(StringRef attribute_name);
 extern const char *no_procedural_access_message;