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SDL2: use native SDL2 Timer API for windows

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Alam Ed Arias 2018-01-22 17:11:07 -05:00
parent 82f2f2f2f9
commit 6ae667c78f
1 changed files with 0 additions and 82 deletions
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82
src/sdl/i_system.c
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@ -1954,70 +1954,6 @@ FUNCMATH ticcmd_t *I_BaseTiccmd2(void)
return &emptycmd2;
}
#if defined (_WIN32)
static HMODULE winmm = NULL;
static DWORD starttickcount = 0; // hack for win2k time bug
static p_timeGetTime pfntimeGetTime = NULL;
// ---------
// I_GetTime
// Use the High Resolution Timer if available,
// else use the multimedia timer which has 1 millisecond precision on Windowz 95,
// but lower precision on Windows NT
// ---------
tic_t I_GetTime(void)
{
tic_t newtics = 0;
if (!starttickcount) // high precision timer
{
LARGE_INTEGER currtime; // use only LowPart if high resolution counter is not available
static LARGE_INTEGER basetime = {{0, 0}};
// use this if High Resolution timer is found
static LARGE_INTEGER frequency;
if (!basetime.LowPart)
{
if (!QueryPerformanceFrequency(&frequency))
frequency.QuadPart = 0;
else
QueryPerformanceCounter(&basetime);
}
if (frequency.LowPart && QueryPerformanceCounter(&currtime))
{
newtics = (INT32)((currtime.QuadPart - basetime.QuadPart) * NEWTICRATE
/ frequency.QuadPart);
}
else if (pfntimeGetTime)
{
currtime.LowPart = pfntimeGetTime();
if (!basetime.LowPart)
basetime.LowPart = currtime.LowPart;
newtics = ((currtime.LowPart - basetime.LowPart)/(1000/NEWTICRATE));
}
}
else
newtics = (GetTickCount() - starttickcount)/(1000/NEWTICRATE);
return newtics;
}
static void I_ShutdownTimer(void)
{
pfntimeGetTime = NULL;
if (winmm)
{
p_timeEndPeriod pfntimeEndPeriod = (p_timeEndPeriod)GetProcAddress(winmm, "timeEndPeriod");
if (pfntimeEndPeriod)
pfntimeEndPeriod(1);
FreeLibrary(winmm);
winmm = NULL;
}
}
#else
//
// I_GetTime
// returns time in 1/TICRATE second tics
@ -2038,30 +1974,12 @@ tic_t I_GetTime (void)
return (tic_t)ticks;
}
#endif
//
//I_StartupTimer
//
FUNCMATH void I_StartupTimer(void)
{
#ifdef _WIN32
// for win2k time bug
if (M_CheckParm("-gettickcount"))
{
starttickcount = GetTickCount();
CONS_Printf("%s", M_GetText("Using GetTickCount()\n"));
}
winmm = LoadLibraryA("winmm.dll");
if (winmm)
{
p_timeEndPeriod pfntimeBeginPeriod = (p_timeEndPeriod)GetProcAddress(winmm, "timeBeginPeriod");
if (pfntimeBeginPeriod)
pfntimeBeginPeriod(1);
pfntimeGetTime = (p_timeGetTime)GetProcAddress(winmm, "timeGetTime");
}
I_AddExitFunc(I_ShutdownTimer);
#endif
}