GDI+ being very slow...

[Darc]

I'm trying to figure out how to get GDI+ to get to higher FPS. Right now it's only going around 8-11 on a good day. I am coding in Visual Basic .NET if that could be the problem for the speed (I only own it and C++ .NET and I have yet to learn Managed C++) This is how I normally do my GDI+ drawing:

 

   Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

       Dim start, count, curr As Integer

       start = Environment.TickCount

       Me.Show()

       Do
           curr = Environment.TickCount

           pbx.Invalidate()
           Application.DoEvents()

           If start <= curr - 1000 Then
               start = Environment.TickCount
               Console.WriteLine(count)
               count = 0
           Else
               count += 1
           End If
       Loop
   End Sub

 

Any tips?

[AndreRyan]

GDI+ is generally slower because it operates like Direct3D's 2D functions[it does Rotation, AlphaBlending, Scaling, etc] but doesn't use Hardware acceleration, so it is very slow. In Windows Longhorn, GDI+ will hopefully be linked into Avalon(New graphics engine, replacement of GDI, it's based on Direct3D) but until then GDI+ has a low framerate so drawing only when necessary(or at least only the parts that change) will increase your framerate reasonably otherwise use the drawing APIs in GDI32.DLL

[ThePentiumGuy]

go to form_load and type in

 

SetStyle(controlstyles.doublebuffer,true)

Setstyle(controlstyles.allpaintinginWMpaint,true)

 

makes it faster & less flickery