(svn r17558) -Feature [NewGRF]: callbacks for houses to disable drawing foundations and to disable slope changes, like industry tile callbacks 30 and 3C.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
index 10dbe3272..da57d68d9 100644
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -426,7 +426,16 @@ void DrawNewHouseTile(TileInfo *ti, HouseID house_id)
 	const SpriteGroup *group;
 	ResolverObject object;
 
-	if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
+	if (ti->tileh != SLOPE_FLAT) {
+		bool draw_old_one = true;
+		if (HasBit(hs->callback_mask, CBM_HOUSE_DRAW_FOUNDATIONS)) {
+			/* Called to determine the type (if any) of foundation to draw for the house tile */
+			uint32 callback_res = GetHouseCallback(CBID_HOUSE_DRAW_FOUNDATIONS, 0, 0, house_id, Town::GetByTile(ti->tile), ti->tile);
+			draw_old_one = (callback_res != 0);
+		}
+
+		if (draw_old_one) DrawFoundation(ti, FOUNDATION_LEVELED);
+	}
 
 	NewHouseResolver(&object, house_id, ti->tile, Town::GetByTile(ti->tile));