art offset saving

Author: kirjavascript

TODO

@@ -19,8 +19,6 @@ definition([
     many(art()),
 ])
 
-// fix file references when copying
-// art ffset save message / input size
 // autozoom based on sprite size for sprites tab
 
 // crackers first, then kd cham

app/components/file/file-object.js

@@ -86,6 +86,9 @@ export const FileObject = observer(({ obj }) => {
 
     function saveArt(e) {
         ioWrap(obj.art.path, setArtError, e, async (path) => {
+            if (obj.art.offset) {
+                throw new Error('Can only save art at offset 0');
+            }
             const tiles = tilesToBuffer(environment.tiles, obj.art.compression);
             await fs.writeFile(path, tiles);
         });