4 files changed, 29 insertions, 20 deletions
diff --git a/src/local-coords.hpp b/src/local-coords.hpp
index 2d449aae..01101ded 100644
--- a/src/local-coords.hpp
+++ b/src/local-coords.hpp
@@ -1,7 +1,7 @@
 #pragma once
 #include "compat/assert.hpp"
+#include "compat/int-hash.hpp"
 #include "tile-defs.hpp"
-#include <cstdint>
 #include <concepts>
 
 namespace floormat {
diff --git a/src/tile-atlas.cpp b/src/tile-atlas.cpp
index 533cc8e9..e6df942f 100644
--- a/src/tile-atlas.cpp
+++ b/src/tile-atlas.cpp
@@ -1,5 +1,7 @@
 #include "tile-atlas.hpp"
 #include "compat/assert.hpp"
+#include "tile-image.hpp"
+#include <limits>
 #include <Corrade/Containers/StringView.h>
 #include <Magnum/Math/Color.h>
 #include <Magnum/ImageView.h>
@@ -11,6 +13,7 @@ tile_atlas::tile_atlas(StringView name, const ImageView2D& image, Vector2ub tile
     texcoords_{make_texcoords_array(Vector2ui(image.size()), tile_count)},
     name_{name}, size_{image.size()}, dims_{tile_count}
 {
+    fm_assert(num_tiles() <= std::numeric_limits<decltype(tile_image::variant)>::max());
     fm_assert(dims_[0] > 0 && dims_[1] > 0);
     fm_assert(size_ % Vector2ui{tile_count} == Vector2ui());
     tex_.setWrapping(GL::SamplerWrapping::ClampToEdge)
diff --git a/src/tile-image.hpp b/src/tile-image.hpp
new file mode 100644
index 00000000..deb04e9a
--- /dev/null
+++ b/src/tile-image.hpp
@@ -0,0 +1,24 @@
+#pragma once
+#include "compat/integer-types.hpp"
+#include <compare>
+#include <memory>
+
+namespace floormat {
+
+struct tile_atlas;
+
+struct tile_image final
+{
+    std::shared_ptr<tile_atlas> atlas;
+    std::uint8_t variant = (std::uint8_t)-1;
+
+    explicit operator bool() const noexcept { return !!atlas; }
+
+    std::strong_ordering operator<=>(const tile_image& o) const noexcept
+    {
+        const auto ret = atlas.get() <=> o.atlas.get();
+        return ret != std::strong_ordering::equal ? ret : variant <=> o.variant;
+    }
+};
+
+} // namespace floormat
diff --git a/src/tile.hpp b/src/tile.hpp
index e8bac834..5103479d 100644
--- a/src/tile.hpp
+++ b/src/tile.hpp
@@ -1,27 +1,9 @@
 #pragma once
 #include "compat/defs.hpp"
-#include "compat/integer-types.hpp"
-#include "tile-defs.hpp"
-#include <memory>
+#include "tile-image.hpp"
 
 namespace floormat {
 
-struct tile_atlas;
-
-struct tile_image final
-{
-    std::shared_ptr<tile_atlas> atlas;
-    std::size_t variant = (std::size_t)-1;
-
-    explicit operator bool() const noexcept { return !!atlas; }
-
-    std::strong_ordering operator<=>(const tile_image& o) const noexcept
-    {
-        const auto ret = atlas.get() <=> o.atlas.get();
-        return ret != std::strong_ordering::equal ? ret : variant <=> o.variant;
-    }
-};
-
 struct tile final
 {
     enum pass_mode : std::uint8_t { pass_blocked, pass_ok, pass_shoot_through, };