(svn r27157) -Fix: Mark bridge middle tiles dirty when building/removing/changing bridges.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/viewport.cpp b/src/viewport.cpp
index 301b5e799..796368114 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -2232,14 +2232,15 @@ void ConstrainAllViewportsZoom()
 /**
  * Mark a tile given by its index dirty for repaint.
  * @param tile The tile to mark dirty.
+ * @param bridge_level_offset Height of bridge on tile to also mark dirty. (Height level relative to north corner.)
  * @ingroup dirty
  */
-void MarkTileDirtyByTile(TileIndex tile)
+void MarkTileDirtyByTile(TileIndex tile, int bridge_level_offset)
 {
 	Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, TilePixelHeight(tile));
 	MarkAllViewportsDirty(
 			pt.x - MAX_TILE_EXTENT_LEFT,
-			pt.y - MAX_TILE_EXTENT_TOP,
+			pt.y - MAX_TILE_EXTENT_TOP - ZOOM_LVL_BASE * TILE_HEIGHT * bridge_level_offset,
 			pt.x + MAX_TILE_EXTENT_RIGHT,
 			pt.y + MAX_TILE_EXTENT_BOTTOM);
 }