#ifndef _HARDWARE_H_
#define _HARDWARE_H_

/** 3DGPL *************************************************\
 *  (MSDOS, 8086+, VGA, BCC/LARGE MODEL+)                 *
 *  Header for hardware specific stuff.                   *
 *                                                        *
 *  hardware.c               hardware specific stuff.     *
 *                                                        *
 *  (6/1995) By Sergei Savhenko. (savs@cs.mcgill.ca).     *
 *  Copyright (c) 1995 Sergei Savchenko.                  *
 *  THIS SOURCE CODE CAN'T BE USED FOR COMERCIAL PURPOSES *
 *  WITHOUT AUTHORISATION                                 *
\**********************************************************/

#include <string.h>                         /* memset, memcpy */

typedef int  signed_16_bit;                 /* compiler/mashine dependent */
typedef long signed_32_bit;           
typedef unsigned int  unsigned_16_bit;
typedef unsigned long unsigned_32_bit;

void HW_set_int(int *dst,int lng,int val);
#define HW_set_char(dst,lng,val)  memset(dst,val,lng)
#define HW_copy_int(src,dst,lng)  memcpy(dst,src,lng*sizeof(int))
#define HW_copy_char(src,dst,lng) memcpy(dst,src,lng)

#define HW_SCREEN_X_SIZE         320             
#define HW_SCREEN_Y_SIZE         200        /* number of pixels total */

#define HW_SCREEN_X_MAX          319
#define HW_SCREEN_Y_MAX          199        /* number of maximum pixel */

#define HW_SCREEN_X_CENTRE       160
#define HW_SCREEN_Y_CENTRE       100        /* middle of the screen */

#define HW_COLOURMAP_SIZE_CHAR 64000L       /* bytes in the colourmap */
#define HW_COLOURMAP_SIZE_INT  32000L       /* ints in the colourmap */

struct HW_colour                            /* describes colour */
{
 int hw_r;
 int hw_g;
 int hw_b;                                  /* intensity components */
};

int HW_open_screen(char *display_name,
                   char *screen_name, 
                   struct HW_colour palette[256],
                   unsigned char *colourmap
                  );
void HW_blit(void);
void HW_close_screen(void);

#define HW_KEY_ARROW_LEFT  75
#define HW_KEY_ARROW_RIGHT 77
#define HW_KEY_ARROW_UP    72
#define HW_KEY_ARROW_DOWN  80

#define HW_KEY_PLUS        43
#define HW_KEY_MINUS       45

#define HW_KEY_ENTER       13
#define HW_KEY_SPACE       32
#define HW_KEY_TAB          9               /* all i can think of */ 

void HW_run_event_loop(void (*application_main)(void),
                       void (*application_key_handler)(int key_code)
                      );
void HW_quit_event_loop(void);

/**********************************************************/

#endif