public static void Draw()
{
GetService <IEventService>().Notify(ServiceEvents.DrawStart);
IRenderService rs = GetService <IRenderService>();
List <ServiceCompositionMetadata> outputs = new List <ServiceCompositionMetadata>();
foreach (IService service in orderedServices)
{
ServiceCompositionMetadata output = service.Draw();
if (rs.IsDrawing)
{
throw new Exception("Service finished drawing without calling End()");
}
if (output != ServiceCompositionMetadata.Empty)
{
outputs.Add(output);
}
}
var sortedOutputs = outputs.OrderBy(output => output.Priority);
rs
.SetRenderTarget(Implementations.RenderService.FINAL_TARGET_KEY, Color.Black)
.SetDepthStencilState(DepthStencilState.None)
.Start()
.Render(() => {
foreach (ServiceCompositionMetadata output in sortedOutputs)
{
if (output.CompositeEffect != rs.GetEffect())
{
rs
.End()
.SetEffect(output.CompositeEffect)
.Start();
}
rs.DrawTargetAtPosition(output.RenderTargetKey, output.Position, Tint: output.Tint);
}
})
.End()
.SetEffect(null)
.Start()
.StretchCurrentTargetToBackBuffer(ShouldLetterbox: true)
.End();
GetService <IEventService>().Notify(ServiceEvents.DrawEnd);
}
