public void MainLoop()
{
var context = new System.Windows.Forms.ApplicationContext(this);
context.MainForm.Visible = true;
var openAdapter = new D3DKMT_OPENADAPTERFROMHDC();
var waitForVblankEvent = new D3DKMT_WAITFORVERTICALBLANKEVENT();
openAdapter.hDc = CreateDC(Screen.PrimaryScreen.DeviceName, null, null, IntPtr.Zero);
bool useD3DKMT = false;
double targetTime = 1.0 / 60;
if (D3DKMTOpenAdapterFromHdc(ref openAdapter) == 0)
{
useD3DKMT = true;
waitForVblankEvent.hAdapter = openAdapter.hAdapter;
waitForVblankEvent.hDevice = 0;
waitForVblankEvent.VidPnSourceId = openAdapter.VidPnSourceId;
}
else
{
var mode = new DEVMODE();
if (EnumDisplaySettings(null, ENUM_CURRENT_SETTINGS, ref mode) && mode.dmBitsPerPel > 0)
{
targetTime = 1.0 / mode.dmDisplayFrequency;
}
}
while (!IsDisposed)
{
var msg = new MSG();
while (PeekMessage(ref msg, IntPtr.Zero, 0, 0, 0x0001 /*PM_REMOVE*/))
{
TranslateMessage(ref msg);
DispatchMessage(ref msg);
}
if (useD3DKMT)
{
D3DKMTWaitForVerticalBlankEvent(ref waitForVblankEvent);
if (!_control.OnRender())
{
return;
}
}
else
{
var startTime = Clock.GetSeconds();
if (!_control.OnRender())
{
return;
}
var renderTime = Clock.GetSeconds() - startTime;
var msTimeout = (int)((targetTime - renderTime) * 1000.0 + 0.5);
if (msTimeout > 0)
{
Thread.Sleep(msTimeout);
}
}
}
}
public static extern uint D3DKMTWaitForVerticalBlankEvent(ref D3DKMT_WAITFORVERTICALBLANKEVENT pData);
