D3DKMTWaitForVerticalBlankEvent

gistfile1.txt

DWORD WINAPI vsyncThread(LPVOID lpParam) {
    dout( "+vsyncThread()" );
    SetThreadPriority( GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL );
    LPFND3DKMT_OPENADAPTERFROMHDC lpfnKTOpenAdapterFromHdc = (LPFND3DKMT_OPENADAPTERFROMHDC)fnBind("gdi32","D3DKMTOpenAdapterFromHdc");
    LPFND3DKMT_WAITFORVERTICALBLANKEVENT lpfnKTWaitForVerticalBlankEvent = (LPFND3DKMT_WAITFORVERTICALBLANKEVENT)fnBind("gdi32","D3DKMTWaitForVerticalBlankEvent");
    if (lpfnKTOpenAdapterFromHdc && lpfnKTWaitForVerticalBlankEvent) {
        D3DKMT_WAITFORVERTICALBLANKEVENT we;
        bool bBound = false;
        while (bRunningTests) {
            if (!bBound) {
                D3DKMT_OPENADAPTERFROMHDC oa;
                oa.hDc = GetDC(NULL);  // NULL = primary display monitor; NOT tested with multiple monitor setup; tested/works with hAppWnd
                bBound = (S_OK==(*lpfnKTOpenAdapterFromHdc)(&oa));
                if (bBound) {
                    we.hAdapter = oa.hAdapter;
                    we.hDevice = 0;
                    we.VidPnSourceId = oa.VidPnSourceId;
                    }
                }
            if (bBound && (S_OK==(*lpfnKTWaitForVerticalBlankEvent)(&we))) {
                vsyncHaveNewTimingInfo( tick() );
                vsyncSignalAllWaiters();
                }
            else {
                bBound = false;
                dout( "*** vsync service in recovery mode..." );
                Sleep(1000);
                }
            }
        }
    dout( "-vsyncThread()" );
    return 0;
    }