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//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// DESCRIPTION:
// Timer functions.
//
#include "SDL.h"
#include "i_timer.h"
#include "doomtype.h"
//
// I_GetTime
// returns time in 1/35th second tics
//
static Uint32 basetime = 0;
int I_GetTime (void)
{
Uint32 ticks;
ticks = SDL_GetTicks();
if (basetime == 0)
basetime = ticks;
ticks -= basetime;
return (ticks * TICRATE) / 1000;
}
//
// Same as I_GetTime, but returns time in milliseconds
//
int I_GetTimeMS(void)
{
Uint32 ticks;
ticks = SDL_GetTicks();
if (basetime == 0)
basetime = ticks;
return ticks - basetime;
}
// Sleep for a specified number of ms
void I_Sleep(int ms)
{
SDL_Delay(ms);
}
void I_WaitVBL(int count)
{
I_Sleep((count * 1000) / 70);
}
void I_InitTimer(void)
{
// initialize timer
SDL_Init(SDL_INIT_TIMER);
}
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