(svn r3726) - [6/6] Finalize conversion, finally save the patches struct.
- Remove the temporary synchronisation in during the map-transfer as this is no longer needed
- The saved patches work just like the saved gameoptions. You have a _patches and a _patches_newgame struct. The _patches_newgame struct contains the values from the configuration file and thus the defaults for new games. When a new game is started or an older game is loaded, the default values are copied over to _patches to be used. When you load a game that has PATS saved, the default values are also loaded, but immediately overwritten by the values from the savegame. This ensures that player-based values are always taken from your personal preferences.
- The current implementation also changes the default values if you change player-based settings in the game. For example changing window_snap_radius in a certain game will also change it for all next OpenTTD sessions.
- The savegame version has been increased to 22.
- The last 6 orso patches close the following reports:
[ 1366446 ] different names for patches: all patch settings have the same name as in the configuration file and are reachable from the console.
[ 1288024 ] Strange string on OTTD initial screen: configuration (and this includes patches) inputs are validated and clamped to their minimum/maximum values.
[ 1423198 ] Make "Signals on Drive side" player, not server, based: this is only visual so current setting is to save it with the savegame but not synchronise in multiplayer.
[ 1208070 ] Patches and New GRF options saved: apart from newgrf this is done

/* $Id$ */

#ifndef NEWGRF_CALLBACKS_H
#define NEWGRF_CALLBACKS_H

/** @file newgrf_callbacks.h
 */

/**
 * List of implemented NewGRF callbacks.
 * Names are formatted as CBID_<CLASS>_<CALLBACK>
 */
enum CallbackID {
	// Powered wagons, if the result is lower as 0x40 then the wagon is powered
	// TODO: interpret the rest of the result, aka "visual effects"
	CBID_TRAIN_WAGON_POWER          = 0x10,

	// Vehicle length, returns the amount of 1/8's the vehicle is shorter
	// only for train vehicles
	CBID_TRAIN_VEHICLE_LENGTH       = 0x11,

	// Refit capacity, the passed vehicle needs to have its ->cargo_type set to
	// the cargo we are refitting to, returns the new cargo capacity
	CBID_VEHICLE_REFIT_CAPACITY     = 0x15,

	CBID_TRAIN_ARTIC_ENGINE         = 0x16,
};

/**
 * Callback masks for vehicles, indicates which callbacks are used by a vehicle.
 * Some callbacks are always used and don't have a mask.
 */
enum VehicleCallbackMask {
	CBM_WAGON_POWER    = 0, ///< Powered wagons (trains only)
	CBM_VEHICLE_LENGTH = 1, ///< Vehicle length (trains only)
	CBM_LOAD_AMOUNT    = 2, ///< Load amount
	CBM_REFIT_CAPACITY = 3, ///< Cargo capacity after refit
	CBM_ARTIC_ENGINE   = 4, ///< Add articulated engines (trains only)
	CBM_CARGO_SUFFIX   = 5, ///< Show suffix after cargo name
	CBM_COLOUR_REMAP   = 6, ///< Change colour mapping of vehicle
	CBM_SOUND_EFFECT   = 7, ///< Vehicle uses custom sound effects
};

/**
 * Result of a failed callback.
 */
enum {
	CALLBACK_FAILED = 0xFFFF
};

#endif /* NEWGRF_CALLBACKS_H */