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dwmapi: Fill qpcVBlank in DwmGetCompositionTimingInfo().

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Paul Gofman 2023-01-09 15:53:32 -06:00 • committed by Alexandre Julliard
parent 09cafcc3b6
commit 62fa96df16
1 changed files with 4 additions and 1 deletions
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5
dlls/dwmapi/dwmapi_main.c
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@ -235,7 +235,7 @@ static int get_display_frequency(void)
*/
HRESULT WINAPI DwmGetCompositionTimingInfo(HWND hwnd, DWM_TIMING_INFO *info)
{
LARGE_INTEGER performance_frequency;
LARGE_INTEGER performance_frequency, qpc;
static int i, display_frequency;
if (!info)
@ -258,6 +258,9 @@ HRESULT WINAPI DwmGetCompositionTimingInfo(HWND hwnd, DWM_TIMING_INFO *info)
QueryPerformanceFrequency(&performance_frequency);
info->qpcRefreshPeriod = performance_frequency.QuadPart / display_frequency;
QueryPerformanceCounter(&qpc);
info->qpcVBlank = (qpc.QuadPart / info->qpcRefreshPeriod) * info->qpcRefreshPeriod;
return S_OK;
}