basically chunk loading

src/asset/assettype.h

@@ -10,6 +10,7 @@
 #include "type/assetalphaimage.h"
 #include "type/assetlanguage.h"
 #include "type/assetmap.h"
+#include "type/assetchunk.h"
 #include <zip.h>
 
 typedef enum {
@@ -19,6 +20,7 @@ typedef enum {
   ASSET_TYPE_ALPHA_IMAGE,
   ASSET_TYPE_LANGUAGE,
   ASSET_TYPE_MAP,
+  ASSET_TYPE_CHUNK,
 
   ASSET_TYPE_COUNT,
 } assettype_t;
@@ -73,5 +75,11 @@ static const assettypedef_t ASSET_TYPE_DEFINITIONS[ASSET_TYPE_COUNT] = {
     .loadStrategy = ASSET_LOAD_STRAT_ENTIRE,
     .dataSize = sizeof(assetmap_t),
     .entire = assetMapLoad
+  },
+
+  [ASSET_TYPE_CHUNK] = {
+    .header = "DCF",
+    .loadStrategy = ASSET_LOAD_STRAT_CUSTOM,
+    .custom = assetChunkLoad
   }
 };