#ifndef _WGT5_
#define _WGT5_

/* 
   WordUp Graphics Toolkit V5.0 Header File
   WATCOM C/C++ FLAT MODEL
   
   Copyright 1995 Egerter Software
*/

#include <stdio.h>

#ifdef __cplusplus
 extern "C" {
#endif

typedef unsigned char * block;
typedef unsigned char * wgtfont;
typedef unsigned short * wgtmap;

/* Text grid settings */
#define TEXTGRID_OFF 0
#define TEXTGRID_ON 1

/* Text transparency settings */
#define TEXTFG 0
#define TEXTBG 1
#define TEXTFGBG 2

/* Image transfer operations */
#define NORMAL 0
#define XRAY 1

/* whollowpoly types */
#define CLOSED_POLY 0
#define OPEN_POLY 1

/* Flip block operations */
#define VERTICAL 0
#define HORIZONTAL 1

/* Shading operations */
#define SHADE_NORMAL 0
#define SHADE_XRAY 1
#define SHADE_SHADOW 2
#define SHADE_TRANSLUCENT 3
#define SHADE_MONO 4

/* Triangle Rendering Methods */
#define WIREFRAME             0
#define SOLID                 1
#define GOURAUD               2
#define TEXTURE               3
#define FLAT_SHADE_TEXTURE    4
#define GOURAUD_SHADE_TEXTURE 5
#define TRANSLUCENT_TEXTURE   6
#define TRANSLUCENT_GOURAUD   7

/* Convert from ticks/sec */
#define TICKS(hz) ((int)(1193182L/(hz)))

extern struct {
  short xres;
  short yres;
  short videomode;
  int   videobanksize;
  short (*bankswitch)(short);
  short screenwidth;
  short screenheight;
} WGT_SYS;


/* A single palette register definition */
typedef struct 
{
  unsigned char r,g,b;
} color;


/* Triangle point definition */
typedef struct
{
  short x,y;           /* Coordinate on the screen */
  long sx,sy;          /* Coordinate on the texture */
  short col;
} tpoint;


/* Polygon point definition */
typedef struct
{
  short x,y;   /* Coordinate on the screen */
  short sx,sy; /* Coordinate on the texture if texture is used,
		  otherwise sx = color point */
	       /* sx is used for Gouraud shading as well (color of the point) */
} tpolypoint;

/* Scan converted polygon routines */
typedef struct 
{
  short **pointbuffer;       /* Holds a buffer of x coordinates for each
				row of the polygon. */
  unsigned short *numpoints; /* Holds the size of the point buffer in
				bytes. */
} wscanpoly;



/* WGTLIB variables */
extern fpos_t lfpos;
extern FILE *libf;
extern short lresult;
extern int   lsize;
extern char  password[16];
extern char  *wgtlibrary;

/* Keyboard Interrupt */
extern short kbdon[128];
extern short keypressed;

/* Mouse variables */
typedef struct {
  short but;
  short mx;
  short my;
} callback_data;
extern callback_data mouse;

/* Clipping boundaries */
extern short bx,by,tx,ty;

/* Current drawing color */
extern unsigned char currentcolor;

/* Software cursor flashing speed */
extern short curspeed;

/* Software cursor coordinates */
extern short xc,yc;

/* Pointer to the active drawing page */
extern block abuf;


/* Function Prototypes */
short  checkpassword (char *temp);
void   findfile (char *filename);
unsigned int getmemfree (void);
void   installkbd (void);
void * lib2buf (char *loadfile);
short  lock_region (void *address, unsigned length);
void   mdeinit (void);
short  minit (void);
void   moff (void);
void   mon (void);
void   mouseshape (short colhot, short rowhot, unsigned short *bitmap);
void   mread (void);
void   msetbounds (short x, short y, short x2, short y2);
void   msetspeed (short x, short y);
void   msetthreshhold (short speed);
void   msetxy (short x, short y);
void   noclick (void);
void   readheader (void);
void   setlib (char *libraryname);
void   setpassword (char *newpass);
void   uninstallkbd (void);
void   vga256 (void);
char   vgadetected (void);
block  wallocblock (short width, short height);
void   wbar (short x, short y, short x2, short y2);
void   wbezier (tpolypoint *rawpts, short numraw, tpolypoint *curvepts,
		short numcurve);
void   wbutt (short x, short y, short x2, short y2);
void   wcircle (short x_center, short y_center, short radius);
void   wclip (short x, short y, short x2, short y2);
void   wcls (unsigned char col);
void   wcolrotate (unsigned char start, unsigned char finish, short dir,
		   color *palt);
void   wcopyscreen (short x, short y, short x2, short y2, block ptr, short destx,
		    short desty, block to);
void   wdeinitpoly (void);
void   wdeinit_triangle_renderer (void);
void   wdissolve (block myimage, short *patt, short speed);
void   wdraw_scanpoly (short x, short y, wscanpoly *newp,
		    void (*customline)(short,short,short));
void   wellipse (short xc, short yc, short xr, short yr);
void   wfade_between (unsigned char start, unsigned char finish, short speed,
		      color *pal1, color *pal2);
void   wfade_between_once (unsigned char start, unsigned char finish,
		      color *pal1, color *pal2);
void   wfade_in (unsigned char start, unsigned char finish, short speed,
		 color *pal);
void   wfade_in_once (unsigned char start, unsigned char finish, 
		      color *pal, color *temppal);
void   wfade_out (unsigned char start, unsigned char end, short speed,
		  color *pal);
void   wfade_out_once (unsigned char start, unsigned char finish,
		       color *pal);
void   wfastputpixel (short x, short y);
void   wfill_circle (short x_center, short y_center, short radius);
void   wfill_ellipse (short xc, short yc, short xr, short yr);
void   wflashcursor (void);
void   wfline (short x, short y, short x2, short y2);
void   wflipblock (block pr, short dir);
void   wfree_scanpoly (wscanpoly *freep);
void   wfreeblock (block ptr);
void   wfreefont (wgtfont ptr);
void   wfreesprites (block *spr, short start, short end);
short  wget_capslock (void);
unsigned char wget_imagebit (block image);
unsigned char wget_imagebyte (block image);
short  wget_lalt (void);
short  wget_lctrl (void);
short  wget_lshift (void);
short  wget_numlock (void);
short  wget_ralt (void);
short  wget_rctrl (void);
short  wget_rshift (void);
short  wget_scrlock (void);
short  wgetblockheight (block ptr);
short  wgetblockwidth (block ptr);
short  wgetmode (void);
unsigned char wgetpixel (short x, short y);
short  wgettextheight (char *printit, wgtfont pr);
short  wgettextwidth (char *printit, wgtfont pr);
void   wgouraudpoly (tpolypoint *vertexlist, short numvertex, short x, short y);
void   wgtprintf (short xloc, short yloc, wgtfont wgtprfon, char *fmt, ... );
void   whline (short x1, short x2, short y);
void   whollowpoly (tpolypoint *vertexlist, short numvertex, short x, short y,
		    short closemode);
void   winitpoly (short maxrows);
void   winit_triangle_renderer (short maxrows);
void   wline (short x, short y, short x2, short y2);
block  wloadblock (char *filename);
block  wloadbmp (char *fname, color *pal);
block  wloadcel (char *filename, color *palload);
wgtfont wloadfont (char *fontfile);
block  wloadgif (char *filename, color p[256]);
block  wloadiff (char *filename, color p[256]);
block  wloadpak (char *filename);
void   wloadpalette (char *filepal, color *clr);
block  wloadpcx (char *filename, color *pal);
short  wloadsprites (color *pal, char *filename, block *spr, short start, 
		     short end);
block  wnewblock (short x, short y, short x2, short y2);
void   wnormscreen (void);
short  woutchar (short asc, short xc, short yc, wgtfont pr);
void   wouttextxy (short x, short y, wgtfont fnt, char *printit);
void   wpan (unsigned short panofs);
void   wputblock (short x, short y, block pr, short method);
void   wputblock_shade (short x, short y, block src, block shadetable,
			int mode);
void   wputpixel (short x, short y);
void   wreadpalette (unsigned char start, unsigned char finish, color *palc);
void   wrectangle (short x, short y, short x2, short y2);
void   wregionfill (short x, short y);
void   wremap (color *p1, block picture, color *p2);
void   wresize (int x, int y, int x2, int y2, block resizeblock,
		short mode);
void   wresize_column (int x, int y, int y2, block resizeblock,
		       short column, short mode);
void   wresize_shade (short x, short y, short x2, short y2,
		      block resizeblock, unsigned char *shadetable,
		      short mode);
void   wretrace (void);
short  wsaveblock (char *filename, block ptr);
short  wsavebmp (char *fname, block saveptr, color *pal);
short  wsavecel (char *filename, block savecel, color *palsave);
short  wsaveiff (char *filename, block image, color p[256]);
short  wsavepak (char *filename, block ptr);
void   wsavepalette (char *filepal, color *clr);
short  wsavepcx (char *filename, block savepcx, color *pal);
short  wsavesprites (color *pal, char *filename, block *sprite, short start, short end);
void   wscan_convertpoly (tpolypoint *vertexlist, short numvertex,
		    wscanpoly *newp);
void   wset_capslock (short state);
void   wset_imagebyte (block image, unsigned char status);
void   wset_numlock (short state);
void   wset_scrlock (short state);
void   wsetcolor (unsigned char col);
void   wsetcursor (short start, short end);
void   wsetmode (short mode);
void   wsetpalette (unsigned char start, unsigned char finish, color *pal);
void   wsetrgb (unsigned char num, unsigned char red, unsigned char green, 
		unsigned char blue, color *pal);
void   wsetscreen (block ptr);
void   wskew (short x, short y, block blockname, short degrees);
void   wsline (short x, short y, short x2, short y2, short *lad);
void   wsolidpoly(tpolypoint *vertexlist, short numvertex, short x, short y,
		void (*customline)(short,short,short));
void   wstring (short x, short y, char *s, char *legal, short maxlength);
void   wstyleline (short x, short y, short x2, short y2, unsigned short style);
void   wtextbackground (unsigned char col);
void   wtextcolor (unsigned char col);
void   wtextgrid (short state);
void   wtexttransparent (short mode);
void   wtexturedpoly (tpolypoint *vertexlist, short numvertex, short x, short y,
		      block tex, short mode);
void   wtriangle_solid (tpoint *ftri);
void   wtriangle_gouraud (tpoint *gtri);
void   wtriangle_texture (tpoint *ttri, block texture);
void   wtriangle_flat_shaded_texture (tpoint *ttri, block texture, 
				      short shade, block shadetable);
void   wtriangle_gouraud_shaded_texture (tpoint *ttri, block texture,
					 block shadetable);
void   wtriangle_translucent_gouraud (tpoint *gtri, block shadetable);
void   wtriangle_translucent_texture (tpoint *ttri, block texture,
			      block shadetable);
void   wupdate_imagebytes (block *image_array, short start, short end);
void   wvertres (short x, short y, short y2, block ptr);
void   wwarp (short sx, short ex, short *tpy, short *bty, block ptr, int mode);
void   wwipe (short x, short y, short x2, short y2, block cpy);
void   wxorbox (short x, short y, short x2, short y2, unsigned char col);

/* File Selector */
char *wfilesel (char *mask, char *title, short x, short y, block background);
extern wgtfont filefont;

#ifdef __cplusplus
}
#endif

#endif