Check if the tiles passed are of the correct format

agb/examples/text_render.rs

@@ -8,7 +8,6 @@ use agb::{
     },
     include_font,
 };
-use modular_bitfield::private::checks::FourMod8;
 
 use core::fmt::Write;
 

agb/src/display/tiled/map.rs

@@ -195,6 +195,14 @@ impl RegularMap {
         tileset: &TileSet<'_>,
         tile_setting: TileSetting,
     ) {
+        if tileset.format() != self.colours() {
+            panic!(
+                "Cannot set a {:?} colour tile on a {:?} colour background",
+                tileset.format(),
+                self.colours()
+            );
+        }
+
         let pos = self.map_size().gba_offset(pos);
 
         let old_tile = self.tiles_mut()[pos];

agb/src/display/tiled/vram_manager.rs

@@ -57,6 +57,10 @@ impl<'a> TileSet<'a> {
     fn reference(&self) -> NonNull<[u8]> {
         self.tiles.into()
     }
+
+    pub(crate) fn format(&self) -> TileFormat {
+        self.format
+    }
 }
 
 #[derive(Debug, Clone, Copy)]