#ifndef __lighting_h__
#define __lighting_h__

#include <allegro.h>

#include "types.h"

extern BITMAP* buffer;

/* lighting.c */
extern void combine_maps(BITMAP* light, BITMAP* vis, BITMAP* img, BITMAP* buf);

/* imgutil.c */
extern BITMAP** load_lighting_maps(void);

/* config.c (ugh) */
extern int depth;
extern int width;
extern int height;
extern int use_overbright;
extern int use_shadow;

/* heap.c */
#define process_heap(h, f) _process_heap((h), ((void(*)(void*))(f)))
#define create_heap(h, p, s, c, d) _create_heap((h), (p), (s), \
		((void*(*)(void))(c)), ((void(*)(void*))(d)))
#define PROC_VA(f) ((void(*)(void*, va_list))(f))
extern void* new_from_heap(Heap* heap);
extern void delete_from_heap(Heap* heap, void* data);
extern void _process_heap(Heap* heap, void (*proc)(void*));
extern void process_heap_va(Heap* heap, void (*proc)(void*, va_list), ...);
extern void empty_heap(Heap* heap);
extern void _create_heap(Heap* heap, int capacity, int step,
		void*(*create)(void), void(*destroy)(void*));
extern void destroy_heap(Heap* heap);

/* vwedge.c */
extern VWedge* create_vwedge();
extern void destroy_vwedge(VWedge* wedge);
extern void process_vwedge_vis(VWedge* wedge);
extern void draw_vwedge(BITMAP* bmp, VWedge* wedge, int color);

/* vline.c */
extern VLine* create_vline(void);
extern void destroy_vline(VLine* vline);
extern void find_vlines(Heap* lines, Heap* world);
extern void draw_vlines(BITMAP* bmp, int x, int y, Heap* lines, int color);
extern void add_vertex_to_vline(VLine* vline, int x, int y);

/* polygon.c */
extern Polygon* create_polygon(void);
extern void destroy_polygon(Polygon* poly);

/* math.c */
extern int dist(int x1, int y1, int x2, int y2);
extern int sqr_dist(int x1, int y1, int x2, int y2);
extern int middle_point(int x1, int y1, int x2, int y2, int x3, int y3);
extern int intersection(int x1, int y1, int x2, int y2, int x3, int y3,
		int x4, int y4, int* _x, int* _y, int c);
extern int same_side(int x1, int y1, int x2, int y2, int xa, int ya, int xb,
		int yb);
extern int collinear(int x1, int y1, int x2, int y2, int x3, int y3);

#endif