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