#ifndef _WGTSCROL_
#define _WGTSCROL_

#include <wgt5.h>

/*
   WordUp Graphics Toolkit V5.0  Multidirectional Scrolling Library
   Copyright 1995 Egerter Software
*/

#ifdef __cplusplus
extern "C" {
#endif

#define NORMAL 0
#define PARALLAX 1
#define MAXWINDOWS 50

extern block scrollblock[MAXWINDOWS];
extern short windowminx[MAXWINDOWS];
extern short windowminy[MAXWINDOWS];
extern short windowmaxx[MAXWINDOWS];
extern short windowmaxy[MAXWINDOWS];
extern short worldx[MAXWINDOWS];
extern short worldy[MAXWINDOWS];
extern short worldmaxx[MAXWINDOWS];
extern short worldmaxy[MAXWINDOWS];
extern short mapwidth[MAXWINDOWS];
extern short mapheight[MAXWINDOWS];
extern short tilewidth[MAXWINDOWS];
extern short tileheight[MAXWINDOWS];
extern short windowwidth[MAXWINDOWS];
extern short windowheight[MAXWINDOWS];    /* Size of window (in tiles) */

typedef struct {
        char on;
        short x;
        short y;
        unsigned short num;
        } scrollsprite;

short      is_in_window(short curwindow, short x, short y, short range);
short      soverlap(short s1, scrollsprite *wobjects1, block *sprites1,
                  short s2, scrollsprite *wobjects2, block *sprites2);
void     wendscroll(short currentwindow);
void     wfreemap(wgtmap mapname);
unsigned short wgetworldblock(short currentwindow, short posx, short posy);
unsigned char wgetworldpixel(short currentwindow, short x, short y);
void     winitscroll (short currentwindow, short mode, short link, short xwidth,
                      short ywidth, block *tileref);
wgtmap   wloadmap(short currentwindow, char *filename, short *tiletypes,
                  scrollsprite *wobjects);
void     wputworldblock(short currentwindow, short posx, short posy, unsigned short tilenum);
void     wsavemap(short currentwindow, char *filename, wgtmap savemap, 
                  short *tiletypes, scrollsprite *wobjects, short numobj);
void     wscrollwindow(short currentwindow, short wspeedx, short wspeedy);
void     wshowobjects(short currentwindow, short start, short end, block *sprites,
                      scrollsprite *wobjects);
void     wshowwindow(short currentwindow, short posx, short posy);
short      wscreen_coordx (short currentwindow, short xcoord);
short      wscreen_coordy (short currentwindow, short ycoord);
void     wcopymap (short source, short dest);
void   set_transparent_tile (unsigned char tile);

#ifdef __cplusplus
}
#endif

#endif