tron@679: #include "stdafx.h"
tron@679: #include "ttd.h"
tron@1218: #include "functions.h"
tron@679: #include "map.h"
tron@679: 
tron@1218: uint _map_log_x;
tron@1218: uint _map_log_y;
tron@689: 
tron@1218: byte   *_map_type_and_height = NULL;
tron@1218: byte   *_map_owner           = NULL;
tron@1218: uint16 *_map2                = NULL;
tron@1218: byte   *_map3_lo             = NULL;
tron@1218: byte   *_map3_hi             = NULL;
tron@1218: byte   *_map5                = NULL;
tron@1218: byte   *_map_extra_bits      = NULL;
tron@863: 
tron@1218: 
tron@1218: void InitMap(uint log_x, uint log_y)
tron@1218: {
tron@1218: 	uint map_size;
tron@1218: 
tron@1218: 	assert(log_x <= 15 && log_y <= 15);
tron@1218: 
tron@1218: 	_map_log_x = log_x;
tron@1218: 	_map_log_y = log_y;
tron@1218: 
tron@1218: 	map_size = MapSize();
tron@1218: 
tron@1218: 	_map_type_and_height =
tron@1218: 		realloc(_map_type_and_height, map_size * sizeof(_map_type_and_height[0]));
tron@1218: 	_map_owner = realloc(_map_owner, map_size * sizeof(_map_owner[0]));
tron@1218: 	_map2      = realloc(_map2,      map_size * sizeof(_map2[0]));
tron@1218: 	_map3_lo   = realloc(_map3_lo,   map_size * sizeof(_map3_lo[0]));
tron@1218: 	_map3_hi   = realloc(_map3_hi,   map_size * sizeof(_map3_hi[0]));
tron@1218: 	_map5      = realloc(_map5,      map_size * sizeof(_map5[0]));
tron@1218: 	_map_extra_bits =
tron@1218: 		realloc(_map_extra_bits, map_size * sizeof(_map_extra_bits[0] / 4));
tron@1218: 
tron@1218: 	// XXX TODO handle memory shortage more gracefully
tron@1218: 	if (_map_type_and_height == NULL ||
tron@1218: 			_map_owner           == NULL ||
tron@1218: 			_map2                == NULL ||
tron@1218: 			_map3_lo             == NULL ||
tron@1218: 			_map3_hi             == NULL ||
tron@1218: 			_map5                == NULL ||
tron@1218: 			_map_extra_bits      == NULL)
tron@1218: 		error("Failed to allocate memory for the map");
tron@1218: }
tron@900: 
tron@955: 
tron@955: #ifdef _DEBUG
tron@955: TileIndex TileAdd(TileIndex tile, TileIndexDiff add,
tron@955: 	const char *exp, const char *file, int line)
tron@955: {
tron@955: 	int dx;
tron@955: 	int dy;
tron@955: 	uint x;
tron@955: 	uint y;
tron@955: 
tron@955: 	dx = add & MapMaxX();
darkvater@957: 	if (dx >= (int)MapSizeX() / 2) dx -= MapSizeX();
tron@955: 	dy = (add - dx) / (int)MapSizeX();
tron@955: 
tron@955: 	x = TileX(tile) + dx;
tron@955: 	y = TileY(tile) + dy;
tron@955: 
tron@955: 	if (x >= MapSizeX() || y >= MapSizeY()) {
tron@955: 		char buf[512];
tron@955: 
tron@955: 		sprintf(buf, "TILE_ADD(%s) when adding 0x%.4X and 0x%.4X failed",
tron@955: 			exp, tile, add);
tron@955: #if !defined(_MSC_VER)
tron@955: 		fprintf(stderr, "%s:%d %s\n", file, line, buf);
tron@955: #else
tron@955: 		_assert(buf, (char*)file, line);
tron@955: #endif
tron@955: 	}
tron@955: 
tron@955: 	assert(TILE_XY(x,y) == TILE_MASK(tile + add));
tron@955: 
tron@955: 	return TILE_XY(x,y);
tron@955: }
tron@955: #endif
tron@955: 
tron@955: 
tron@1202: uint ScaleByMapSize(uint n)
tron@1202: {
tron@1202: 	int shift = (int)MapLogX() - 8 + (int)MapLogY() - 8;
tron@1202: 
tron@1202: 	if (shift < 0)
tron@1202: 		return (n + (1 << -shift) - 1) >> -shift;
tron@1202: 	else
tron@1202: 		return n << shift;
tron@1202: }
tron@1202: 
tron@1202: 
tron@1202: uint ScaleByMapSize1D(uint n)
tron@1202: {
tron@1202: 	int shift = ((int)MapLogX() - 8 + (int)MapLogY() - 8) / 2;
tron@1202: 
tron@1202: 	if (shift < 0)
tron@1202: 		return (n + (1 << -shift) - 1) >> -shift;
tron@1202: 	else
tron@1202: 		return n << shift;
tron@1202: }
tron@1202: 
tron@1202: 
tron@909: const TileIndexDiffC _tileoffs_by_dir[] = {
tron@909: 	{-1,  0},
tron@909: 	{ 0,  1},
tron@909: 	{ 1,  0},
tron@909: 	{ 0, -1}
tron@900: };