tron@679: #ifndef MAP_H
tron@679: #define MAP_H
tron@679: 
tron@679: #define TILE_X_BITS 8
tron@679: #define TILE_Y_BITS 8
tron@679: 
truelight@817: extern byte   _map_type_and_height[];
truelight@817: extern byte   _map5[];
truelight@817: extern byte   _map3_lo[];
truelight@817: extern byte   _map3_hi[];
truelight@817: extern byte   _map_owner[];
truelight@817: extern uint16 _map2[];
truelight@817: extern byte   _map_extra_bits[];
tron@679: 
tron@689: // binary logarithm of the map size, try to avoid using this one
tron@689: static inline uint MapLogX(void)  { extern uint _map_log_x; return _map_log_x; }
tron@689: static inline uint MapLogY(void)  { extern uint _map_log_y; return _map_log_y; }
tron@689: /* The size of the map */
tron@689: static inline uint MapSizeX(void) { return 1 << MapLogX(); }
tron@689: static inline uint MapSizeY(void) { return 1 << MapLogY(); }
tron@689: /* The maximum coordinates */
tron@689: static inline uint MapMaxX(void) { return MapSizeX() - 1; }
tron@689: static inline uint MapMaxY(void) { return MapSizeY() - 1; }
tron@689: /* The number of tiles in the map */
tron@689: static inline uint MapSize(void) { return MapSizeX() * MapSizeY(); }
tron@689: 
tron@900: typedef int16 TileIndexDiff;
tron@900: 
tron@909: typedef struct TileIndexDiffC {
tron@909: 	int16 x;
tron@909: 	int16 y;
tron@909: } TileIndexDiffC;
tron@909: 
tron@909: static inline TileIndexDiff ToTileIndexDiff(TileIndexDiffC tidc)
tron@909: {
tron@909: 	return (tidc.y << MapLogX()) + tidc.x;
tron@909: }
tron@900: 
tron@900: static inline TileIndexDiff TileOffsByDir(uint dir)
tron@900: {
tron@909: 	extern const TileIndexDiffC _tileoffs_by_dir[4];
tron@900: 
tron@900: 	assert(dir < lengthof(_tileoffs_by_dir));
tron@909: 	return ToTileIndexDiff(_tileoffs_by_dir[dir]);
tron@900: }
tron@900: 
tron@679: #endif