void _glfwInitTimer( void )
{
__int64 freq;
// Check if we have a performance counter
if( QueryPerformanceFrequency( (LARGE_INTEGER *)&freq ) )
{
// Performance counter is available => use it!
_glfwLibrary.Timer.HasPerformanceCounter = GL_TRUE;
// Counter resolution is 1 / counter frequency
_glfwLibrary.Timer.Resolution = 1.0 / (double)freq;
// Set start time for timer
QueryPerformanceCounter( (LARGE_INTEGER *)&_glfwLibrary.Timer.t0_64 );
}
else
{
// No performace counter available => use the tick counter
_glfwLibrary.Timer.HasPerformanceCounter = GL_FALSE;
// Counter resolution is 1 ms
_glfwLibrary.Timer.Resolution = 0.001;
// Set start time for timer
_glfwLibrary.Timer.t0_32 = _glfw_timeGetTime();
}
}
uint64_t _glfwPlatformGetTimerValue(void)
{
if (_glfw.win32_time.hasPC)
{
uint64_t value;
QueryPerformanceCounter((LARGE_INTEGER*) &value);
return value;
}
else
return (uint64_t) _glfw_timeGetTime();
}
// Return raw time
//
static unsigned __int64 getRawTime(void)
{
if (_glfw.win32_time.hasPC)
{
unsigned __int64 time;
QueryPerformanceCounter((LARGE_INTEGER*) &time);
return time;
}
else
return (unsigned __int64) _glfw_timeGetTime();
}
void _glfwPlatformSetTime(double t)
{
__int64 t_64;
if (_glfwLibrary.Win32.timer.hasPC)
{
QueryPerformanceCounter((LARGE_INTEGER*) &t_64);
_glfwLibrary.Win32.timer.t0_64 = t_64 - (__int64) (t / _glfwLibrary.Win32.timer.resolution);
}
else
_glfwLibrary.Win32.timer.t0_32 = _glfw_timeGetTime() - (int)(t * 1000.0);
}
double _glfwPlatformGetTime(void)
{
double t;
__int64 t_64;
if (_glfwLibrary.Win32.timer.hasPC)
{
QueryPerformanceCounter((LARGE_INTEGER*) &t_64);
t = (double)(t_64 - _glfwLibrary.Win32.timer.t0_64);
}
else
t = (double)(_glfw_timeGetTime() - _glfwLibrary.Win32.timer.t0_32);
return t * _glfwLibrary.Win32.timer.resolution;
}
void _glfwInitTimer(void)
{
__int64 freq;
if (QueryPerformanceFrequency((LARGE_INTEGER*) &freq))
{
_glfwLibrary.Win32.timer.hasPC = GL_TRUE;
_glfwLibrary.Win32.timer.resolution = 1.0 / (double) freq;
QueryPerformanceCounter((LARGE_INTEGER*) &_glfwLibrary.Win32.timer.t0_64);
}
else
{
_glfwLibrary.Win32.timer.hasPC = GL_FALSE;
_glfwLibrary.Win32.timer.resolution = 0.001; // winmm resolution is 1 ms
_glfwLibrary.Win32.timer.t0_32 = _glfw_timeGetTime();
}
}
double _glfwPlatformGetTime( void )
{
double t;
__int64 t_64;
if( _glfwLibrary.Timer.HasPerformanceCounter )
{
QueryPerformanceCounter( (LARGE_INTEGER *)&t_64 );
t = (double)(t_64 - _glfwLibrary.Timer.t0_64);
}
else
{
t = (double)(_glfw_timeGetTime() - _glfwLibrary.Timer.t0_32);
}
// Calculate the current time in seconds
return t * _glfwLibrary.Timer.Resolution;
}