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Stop overflow of timer on long running machines. #666

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Stop overflow of timer on long running machines. #666

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2 changes: 2 additions & 0 deletions include/polycode/core/PolyWinCore.h
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Original file line number Diff line number Diff line change
Expand Up @@ -288,6 +288,8 @@ class Gamepad_devicePrivate {

// frequency of the windows performance counter
double pcFreq;
// Initial Value of the performance counter
int PerfInitial;

// Tracks whether the system supports multitouch at runtime
bool hasMultiTouch;
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3 changes: 3 additions & 0 deletions src/core/PolyWinCore.cpp
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Expand Up @@ -138,6 +138,7 @@ Win32Core::Win32Core(PolycodeViewBase *view, int _xRes, int _yRes, bool fullScre
LARGE_INTEGER li;
QueryPerformanceFrequency(&li);
pcFreq = double(li.QuadPart)/1000.0;
PerfInitial = 0;

setVSync(vSync);

Expand Down Expand Up @@ -206,6 +207,8 @@ void Win32Core::warpCursor(int x, int y) {
unsigned int Win32Core::getTicks() {
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
if (PerfInitial == 0)
PerfInitial = li.QuadPart;
return (unsigned int)(li.QuadPart / pcFreq);
}

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