Android Question [B4X] Drawing lines with BitmapCreator

Private Sub line(BC As BitmapCreator, x1 As Int, y1 As Int, x2 As Int, y2 As Int, Color As Int)
    Dim Dx,Dy,Diff As Int
    Dim x,y As Float
   
    Dx = x2 - x1
    Dy = y2 - y1
    Diff=Max(Abs(Dx),Abs(Dy))
    For D=0 To Diff 
        x= x1 + Dx*D/Diff
        y = y1 + Dy*D/Diff
        If (x>=0 And x<BC.mWidth) And (y>=0 And y<BC.mHeight) Then BC.SetColor(x,y,Color)
    Next
End Sub