1 files changed, 10 insertions, 0 deletions
diff --git a/src/tilearea.cpp b/src/tilearea.cpp
index 81efe96be..fb3e11394 100644
--- a/src/tilearea.cpp
+++ b/src/tilearea.cpp
@@ -95,3 +95,13 @@ bool TileArea::Intersects(const TileArea &ta) const
 		);
 }
 
+/**
+ * Clamp the tile area to map borders.
+ */
+void TileArea::ClampToMap()
+{
+	assert(this->tile < MapSize());
+	this->w = min(this->w, MapSizeX() - TileX(this->tile));
+	this->h = min(this->h, MapSizeY() - TileY(this->tile));
+}
+