private void DrawFrame()
{
try
{
if (_deviceLost)
{
_context.InvokeReset();
_deviceLost = false;
#if DEBUG
_context.PerformanceMonitor.IncreaseLifetimeCounter(LifetimeCounters.DeviceResets);
#endif
return;
}
if (_drawState == null)
{
_drawState = new DrawState(_container);
}
_drawState.IncrementFrameIndex();
_drawState.FrameTime = _gameTime.FrameTime;
_drawState.FrameTimeMs = _gameTime.FrameTimeMs;
_drawState.TotalGameTime = _gameTime.TotalGameTime;
_drawState.Paused = _gameTime.Paused;
#if DEBUG
_context.PerformanceMonitor.StartTimer(DeviceTimers.BeforeDraw);
#endif
OnBeforeDraw();
#if DEBUG
_context.PerformanceMonitor.StopTimer(DeviceTimers.BeforeDraw);
_context.PerformanceMonitor.StartTimer(DeviceTimers.RenderTimer);
#endif
ushort stackHeight, stateHeight, cameraHeight, preCull, postCull;
_drawState.GetStackHeight(out stackHeight, out stateHeight, out cameraHeight, out preCull, out postCull);
_drawState.PrepareForNewFrame();
if (_drawState.BeginScene())
{
_screenTarget.BeginWorld(_drawState);
_worldRenderChain.Execute(_drawState);
_drawState.UnbindShader();
_screenTarget.EndWorld(_drawState);
_screenTarget.BeginUI(_drawState);
_uiRenderChain.Execute(_drawState);
_drawState.UnbindShader();
_screenTarget.EndUI(_drawState);
_screenTarget.Combine(_drawState);
_drawState.ValidateStackHeight(stackHeight, stateHeight, cameraHeight, preCull, postCull);
_drawState.EndScene();
}
#if DEBUG
_context.PerformanceMonitor.StopTimer(DeviceTimers.RenderTimer);
_context.PerformanceMonitor.StartTimer(DeviceTimers.AfterDraw);
#endif
OnAfterDraw();
#if DEBUG
_context.PerformanceMonitor.StopTimer(DeviceTimers.AfterDraw);
#endif
_context.Present();
}
catch (SharpDXException e)
{
switch (_context.CheckDeviceState())
{
case DeviceState.DeviceHung:
throw new Exception("Device hung like a horse.", e);
case DeviceState.DeviceLost:
_deviceLost = true;
break;
case DeviceState.DeviceRemoved:
throw new Exception("Device was removed", e);
case DeviceState.OutOfVideoMemory:
throw new Exception("Out of video memory", e);
default: throw;
}
}
}