87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/*
|
|
* Project 64 - A Nintendo 64 emulator.
|
|
*
|
|
* (c) Copyright 2001 zilmar (zilmar@emulation64.com) and
|
|
* Jabo (jabo@emulation64.com).
|
|
*
|
|
* pj64 homepage: www.pj64.net
|
|
*
|
|
* Permission to use, copy, modify and distribute Project64 in both binary and
|
|
* source form, for non-commercial purposes, is hereby granted without fee,
|
|
* providing that this license information and copyright notice appear with
|
|
* all copies and any derived work.
|
|
*
|
|
* This software is provided 'as-is', without any express or implied
|
|
* warranty. In no event shall the authors be held liable for any damages
|
|
* arising from the use of this software.
|
|
*
|
|
* Project64 is freeware for PERSONAL USE only. Commercial users should
|
|
* seek permission of the copyright holders first. Commercial use includes
|
|
* charging money for Project64 or software derived from Project64.
|
|
*
|
|
* The copyright holders request that bug fixes and improvements to the code
|
|
* should be forwarded to them so if they want them.
|
|
*
|
|
*/
|
|
#include <windows.h>
|
|
#include "main.h"
|
|
#pragma comment(lib, "Winmm.lib")
|
|
|
|
/********************* Win32 Thread Timer ********************/
|
|
|
|
struct {
|
|
DWORD Frames, LastTime;
|
|
DOUBLE Ratio;
|
|
} FPSTimer = { 0,0, 1000.0F / 60.0F };
|
|
|
|
void Timer_Initialize(double Hertz) {
|
|
FPSTimer.Ratio = 1000.0f / Hertz;
|
|
}
|
|
|
|
void Timer_Start(void) {
|
|
TIMECAPS Caps;
|
|
timeGetDevCaps(&Caps, sizeof(Caps));
|
|
if (timeBeginPeriod(Caps.wPeriodMin) == TIMERR_NOCANDO)
|
|
{
|
|
DisplayError("Error during timer begin");
|
|
}
|
|
|
|
FPSTimer.Frames = 0;
|
|
FPSTimer.LastTime = timeGetTime();
|
|
}
|
|
|
|
void Timer_Stop(void) {
|
|
TIMECAPS Caps;
|
|
timeGetDevCaps(&Caps, sizeof(Caps));
|
|
timeEndPeriod(Caps.wPeriodMin);
|
|
}
|
|
|
|
BOOL Timer_Process(DWORD * FrameRate) {
|
|
double CalculatedTime;
|
|
DWORD CurrentTime;
|
|
|
|
FPSTimer.Frames++;
|
|
CurrentTime = timeGetTime();
|
|
|
|
/* Calculate time that should of elapsed for this frame */
|
|
CalculatedTime = (double)FPSTimer.LastTime + (FPSTimer.Ratio * (double)FPSTimer.Frames);
|
|
if ((double)CurrentTime < CalculatedTime) {
|
|
long time = (int)(CalculatedTime - (double)CurrentTime);
|
|
if (time > 0) {
|
|
Sleep(time);
|
|
}
|
|
|
|
/* Refresh current time */
|
|
CurrentTime = timeGetTime();
|
|
}
|
|
|
|
if (CurrentTime - FPSTimer.LastTime >= 1000) {
|
|
/* Output FPS */
|
|
if (FrameRate != NULL) { *FrameRate = FPSTimer.Frames; }
|
|
FPSTimer.Frames = 0;
|
|
FPSTimer.LastTime = CurrentTime;
|
|
|
|
return TRUE;
|
|
} else
|
|
return FALSE;
|
|
} |