Cryptomatte: Data structure in compositor node

This changes the way how the mattes are stored in the compositor node. This used to
be a single string what was decoded/encoded when needed. The new data structure
stores all entries in `CryptomatteEntry` and is converted to the old `matte_id`
property on the fly.

This is done for some future changes in the workflow where a more structured
approach leads to less confusing and easier to read code.

1 files changed, 20 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/versioning_290.c b/source/blender/blenloader/intern/versioning_290.c
index 4e642258899..6f055186702 100644
--- a/source/blender/blenloader/intern/versioning_290.c
+++ b/source/blender/blenloader/intern/versioning_290.c
@@ -52,6 +52,7 @@
 #include "BKE_armature.h"
 #include "BKE_collection.h"
 #include "BKE_colortools.h"
+#include "BKE_cryptomatte.h"
 #include "BKE_fcurve.h"
 #include "BKE_gpencil.h"
 #include "BKE_lib_id.h"
@@ -1280,5 +1281,24 @@ void blo_do_versions_290(FileData *fd, Library *UNUSED(lib), Main *bmain)
         }
       }
     }
+
+    /* Convert `NodeCryptomatte->storage->matte_id` to `NodeCryptomatte->storage->entries` */
+    if (!DNA_struct_find(fd->filesdna, "CryptomatteEntry")) {
+      LISTBASE_FOREACH (Scene *, scene, &bmain->scenes) {
+        if (scene->nodetree) {
+          LISTBASE_FOREACH (bNode *, node, &scene->nodetree->nodes) {
+            if (node->type == CMP_NODE_CRYPTOMATTE) {
+              NodeCryptomatte *storage = (NodeCryptomatte *)node->storage;
+              char *matte_id = storage->matte_id;
+              if (matte_id == NULL || strlen(storage->matte_id) == 0) {
+                continue;
+              }
+              BKE_cryptomatte_matte_id_to_entries(NULL, storage, storage->matte_id);
+              MEM_SAFE_FREE(storage->matte_id);
+            }
+          }
+        }
+      }
+    }
   }
 }