changes to tiled map format

(found by running through rc3 2021 map submissions and looking at what failed)

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/Properties.hs b/lib/Properties.hs
index 0bd3d55..b15ea15 100644
--- a/lib/Properties.hs
+++ b/lib/Properties.hs
@@ -121,7 +121,7 @@ checkTileset = do
     $ complain "Tilesets must have tile size 32×32."
 
   unless (tilesetImageheight tileset < 4096 && tilesetImagewidth tileset < 4096)
-    $ warn "Tilesets should not be larger than 4096×4096 pixels in total."
+    $ warn "Tilesets should not be larger than 4096x4096 pixels in total."
 
   when (isJust (tilesetSource tileset))
     $ complain "Tilesets must be embedded and cannot be loaded from external files."
@@ -129,6 +129,9 @@ checkTileset = do
   unlessHasProperty "tilesetCopyright"
     $ forbid "property \"tilesetCopyright\" for tilesets must be set."
 
+  when (isJust (tilesetFileName tileset))
+    $ complain "The \"filename\" property on tilesets was removed; use \"image\" instead (and perhaps a newer version of the Tiled Editor)."
+
   -- check individual tileset properties
   mapM_ checkTilesetProperty (fromMaybe mempty $ tilesetProperties tileset)