/*
    FILE : TIMER.H
    
    DOS-based Timer Interrupt functions
    Includes defines for TIMER.C and VTIMER.C
*/

#ifndef VTIMER_H
#define VTIMER_H

#include "tdefs.h"

#define VT_VRSYNC    1
#define VT_CALLOLD   2

#ifdef __cplusplus
extern "C" {
#endif

// Defined in TIMER.C

void Timer_Exit(void);
void Timer_Init(int rate, void (*handler)(void));
void Timer_SetSpeed(UWORD rate);
void Timer_Start(void);
void Timer_Stop(void);


// Defined in VTIMER.C
void VT_Exit(void);
void VT_Init(void);
SWORD VT_Alloc(void);
void VT_Free(SWORD handle);
void VT_SetHandler(SWORD handle,void (*handler)(void));
void VT_SetSpeed(SWORD handle,SLONG speed);
void VT_SetBPM(SWORD handle,UBYTE bpm);
void VT_Start(SWORD handle);
void VT_Stop(SWORD handle);
void VT_Mode(UBYTE flags);
void VT_V0Handler(void (*handler)(void));
void VT_V1Handler(void (*handler)(void));

#ifdef __cplusplus
}
#endif


extern volatile int framecount;
void framecounter(void);

// COUNTER.C defnitions
// (ObjectGraphics Library)

#define CNT_ACTIVE   16
#define CNT_VALUE    0
#define CNT_POINTER  1
#define CNT_FUNCTION 2
#define CNT_TYPE     15
                         
typedef struct COUNTER
{  struct COUNTER *next, *prev;
   UBYTE  flags;
   ULONG  counter;
   ULONG  resetcount;
   int    increment;
   int    value;
   int    stopvalue;
} COUNTER;


// Defined in COUNTER.C
// (ObjectGraphics Library)

COUNTER *RegisterCounter(ULONG initcount, ULONG resetcount, int value, int increment, int stopvalue, UBYTE flags);
void RemoveCounter(COUNTER *counter);
void StartCounter(COUNTER *counter);
void StopCounter(COUNTER *counter);

#ifdef DJGPP
#include <dpmi.h>
typedef void (*PVI)();
#define interrupt
#define far
void _dos_setvect(unsigned vector, PVI handler);
PVI _dos_getvect(unsigned vector);
#endif

#endif