1 files changed, 32 insertions, 2 deletions
diff --git a/source/blender/blenkernel/BKE_cryptomatte.hh b/source/blender/blenkernel/BKE_cryptomatte.hh
index 4631bb2616e..c1da0339359 100644
--- a/source/blender/blenkernel/BKE_cryptomatte.hh
+++ b/source/blender/blenkernel/BKE_cryptomatte.hh
@@ -23,11 +23,15 @@
 
 #pragma once
 
+#include <optional>
 #include <string>
 
+#include "BLI_map.hh"
 #include "BLI_string_ref.hh"
 
-namespace blender {
+struct ID;
+
+namespace blender::bke::cryptomatte {
 
 /* Format to a cryptomatte meta data key.
  *
@@ -56,4 +60,30 @@ std::string BKE_cryptomatte_meta_data_key(const StringRef layer_name,
  */
 StringRef BKE_cryptomatte_extract_layer_name(const StringRef render_pass_name);
 
-}  // namespace blender
+struct CryptomatteHash {
+  uint32_t hash;
+
+  CryptomatteHash(uint32_t hash);
+  CryptomatteHash(const char *name, const int name_len);
+  static CryptomatteHash from_hex_encoded(blender::StringRef hex_encoded);
+
+  std::string hex_encoded() const;
+  float float_encoded() const;
+};
+
+struct CryptomatteLayer {
+  blender::Map<std::string, CryptomatteHash> hashes;
+
+#ifdef WITH_CXX_GUARDEDALLOC
+  MEM_CXX_CLASS_ALLOC_FUNCS("cryptomatte:CryptomatteLayer")
+#endif
+
+  static std::unique_ptr<CryptomatteLayer> read_from_manifest(blender::StringRefNull manifest);
+  uint32_t add_ID(const struct ID &id);
+  void add_hash(blender::StringRef name, CryptomatteHash cryptomatte_hash);
+  std::string manifest();
+
+  std::optional<std::string> operator[](float encoded_hash) const;
+};
+
+}  // namespace blender::bke::cryptomatte