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rubidium

(svn r20593) -Fix: (rlongago, r20547): long ago the service interval was int16, after which is got converted to Date except in the order backup. Much later I copied the savegame snippets from a vehicle and applied that on the order backup. Presto, reading/writing 32 bits (of Date) into 16 bits of ancient style service interval. That would then "spoil" the name pointer and that eventually crashes OpenTTD as it's likely to be an invalid pointer.

/* $Id$ */

/*
 * 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 heightmap.h Functions related to creating heightmaps from files. */

#ifndef HEIGHTMAP_H
#define HEIGHTMAP_H

/*
 * Order of these enums has to be the same as in lang/english.txt
 * Otherwise you will get inconsistent behaviour.
 */
enum HeightmapRotation {
	HM_COUNTER_CLOCKWISE, ///< Rotate the map counter clockwise 45 degrees
	HM_CLOCKWISE,         ///< Rotate the map clockwise 45 degrees
};

/**
 * Get the dimensions of a heightmap.
 * @param filename to query
 * @param x dimension x
 * @param y dimension y
 * @return Returns false if loading of the image failed.
 */
bool GetHeightmapDimensions(char *filename, uint *x, uint *y);

/**
 * Load a heightmap from file and change the map in his current dimensions
 *  to a landscape representing the heightmap.
 * It converts pixels to height. The brighter, the higher.
 * @param filename of the heighmap file to be imported
 */
void LoadHeightmap(char *filename);

/**
 * Make an empty world where all tiles are of height 'tile_height'.
 * @param tile_height of the desired new empty world
 */
void FlatEmptyWorld(byte tile_height);

/**
 * This function takes care of the fact that land in OpenTTD can never differ
 * more than 1 in height
 */
void FixSlopes();

#endif /* HEIGHTMAP_H */