(svn r9797) -Feature: [NewGRF] Add action 1, 2 and 3 support for canals.

src/newgrf_canal.h

@@ -0,0 +1,29 @@
+/* $Id$ */
+
+#ifndef NEWGRF_CANAL_H
+#define NEWGRF_CANAL_H
+
+/** List of different canal 'features'.
+ * Each feature gets an entry in the canal spritegroup table */
+enum CanalFeature {
+	CF_WATERSLOPE,
+	CF_LOCKS,
+	CF_DIKES,
+	CF_ICON,
+	CF_DOCKS,
+	CF_END,
+};
+
+
+/** Table of canal 'feature' sprite groups */
+extern const SpriteGroup *_canal_sg[CF_END];
+
+
+/** Lookup the base sprite to use for a canal.
+ * @param feature Which canal feature we want.
+ * @param tile Tile index of canal, if appropriate.
+ * @return Base sprite returned by GRF, or 0 if none.
+ */
+SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile);
+
+#endif /* NEWGRF_CANAL_H */