Feature: Add NotRoadTypes (NRT)

1 files changed, 51 insertions, 0 deletions

diff --git a/src/newgrf_roadtype.h b/src/newgrf_roadtype.h
new file mode 100644
index 000000000..2da7a82c1
--- /dev/null
+++ b/src/newgrf_roadtype.h
@@ -0,0 +1,51 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file newgrf_roadtype.h NewGRF handling of road types. */
+
+#ifndef NEWGRF_ROADTYPE_H
+#define NEWGRF_ROADTYPE_H
+
+#include "road.h"
+#include "newgrf_commons.h"
+#include "newgrf_spritegroup.h"
+
+/** Resolver for the railtype scope. */
+struct RoadTypeScopeResolver : public ScopeResolver {
+	TileIndex tile;      ///< Tracktile. For track on a bridge this is the southern bridgehead.
+	TileContext context; ///< Are we resolving sprites for the upper halftile, or on a bridge?
+
+	RoadTypeScopeResolver(ResolverObject &ro, TileIndex tile, TileContext context);
+
+	/* virtual */ uint32 GetRandomBits() const;
+	/* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
+};
+
+/** Resolver object for road types. */
+struct RoadTypeResolverObject : public ResolverObject {
+	RoadTypeScopeResolver roadtype_scope; ///< Resolver for the roadtype scope.
+
+	RoadTypeResolverObject(const RoadTypeInfo *rti, TileIndex tile, TileContext context, RoadTypeSpriteGroup rtsg, uint32 param1 = 0, uint32 param2 = 0);
+
+	/* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)
+	{
+		switch (scope) {
+			case VSG_SCOPE_SELF: return &this->roadtype_scope;
+			default:             return ResolverObject::GetScope(scope, relative);
+		}
+	}
+
+	/* virtual */ const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const;
+};
+
+SpriteID GetCustomRoadSprite(const RoadTypeInfo *rti, TileIndex tile, RoadTypeSpriteGroup rtsg, TileContext context = TCX_NORMAL, uint *num_results = nullptr);
+
+uint8 GetReverseRoadTypeTranslation(RoadType roadtype, const GRFFile *grffile);
+
+#endif /* NEWGRF_ROADTYPE_H */