/*

 * 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_airporttiles.h NewGRF handling of airport tiles. */

#ifndef NEWGRF_AIRPORTTILES_H

#define NEWGRF_AIRPORTTILES_H

#include "airport.h"

#include "station_map.h"

#include "newgrf_animation_type.h"

#include "newgrf_commons.h"

#include "newgrf_spritegroup.h"

/** Scope resolver for handling the tiles of an airport. */

struct AirportTileScopeResolver : public ScopeResolver {

	struct Station *st;  ///< %Station of the airport for which the callback is run, or \c NULL for build gui.

	byte airport_id;     ///< Type of airport for which the callback is run.

	TileIndex tile;      ///< Tile for the callback, only valid for airporttile callbacks.

	/* virtual */ uint32 GetRandomBits() const;

	/* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;

};

/** Resolver for tiles of an airport. */

struct AirportTileResolverObject : public ResolverObject {

	AirportTileScopeResolver tiles_scope; ///< Scope resolver for the tiles.

	AirportTileResolverObject(const AirportTileSpec *ats, TileIndex tile, Station *st,

			CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);

	/* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)

	{

		switch (scope) {

			case VSG_SCOPE_SELF: return &tiles_scope;

			default: return ResolverObject::GetScope(scope, relative);

		}

	}

};

/**

 * Defines the data structure of each individual tile of an airport.

 */