' ----------------------------------------------------------------------------
 ' ------------------------------------
        ' Verarbeitung 
        ' ---------------------------------------------------------------------
        ' -------------------------------------------
 
        For y As Integer = 0 To l_AddOnSizeZeroBased.Height
 
            For x As Integer = 0 To l_AddOnSizeZeroBased.Width
 
                'Zielpunkt ausrechnen 
                l_DestinationX = pMergePoint.X + x
                l_DestinationY = pMergePoint.Y + y
 
                If (0 <= l_DestinationX) _
                    And (0 <= l_DestinationY) _
                    And (l_DestinationX <= l_DestinationSizeZeroBased.Width) _
                    And (l_DestinationY <= l_DestinationSizeZeroBased.Height) _
                    Then
 
                    'AddOnPixel ermitteln 
                    l_AddOnPixel = l_AddOn.GetPixel(x, y)
 
                    'Farbdifferenz zum Hintergrund 
                    If GetColorDistance(l_AddOnNBackColor, l_AddOnPixel) >= _
                      pDistanceThresHold Then
                        'Kein Hintergrundpixel
 
                        'Bisheriges Zielpixel holen 
                        l_DestinationPixelCurrent = l_Destination.GetPixel(x, y)
 
                        'Mischfarbe herstellen aus bisherigem Pixel und 
                        ' zuzufuegendem Pixel 
                        l_DestinationPixelNew = GetBlendColor( _
                          l_DestinationPixelCurrent, pOP1, l_AddOnPixel, pOP2)
 
                        'Zielpixel mit neuem Inhalt versehen 
                        l_Destination.SetPixel(l_DestinationX, l_DestinationY, _
                          l_DestinationPixelNew)
 
                    Else
                        'Farbdistanz ist zu Gross, somit Hintergrund Pixel, 
                        ' vergiss es 
                    End If
                Else
                    'Zielpunkt liegt ausserhalb vom Zielbild
                    'Vergiss es 
                End If
 
            Next
 
        Next
 
        Return l_Destination
 
    End Function