public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();
    }

    private void BtnGenerate_Click(object sender, RoutedEventArgs e)
    {

        ResultTextBlock.Text = TxtText.Text;
        List Result = GenerateDotFont(ResultTextBlock, (int)SliderSpacing.Value);
        DrawDotFont(Result);
        LstResult.ItemsSource = Result;
           
    }

    public void DrawDotFont(List DotFont)
    {

        DrawingVisual DrawingVisual = new DrawingVisual();
        DrawingContext DrawingContext = DrawingVisual.RenderOpen();

        foreach (Point Dot in DotFont)
        {
            DrawingContext.DrawRectangle(Brushes.White, null,
                new Rect(Dot.X,Dot.Y,2,2));
        }

        DrawingContext.Close();

        RenderTargetBitmap bmp = new RenderTargetBitmap((int)ResultTextCanvas.Width, (int)ResultTextCanvas.Height, 96, 96, PixelFormats.Pbgra32);
        bmp.Render(DrawingVisual);
        ResultTextCanvas.Background = new ImageBrush(bmp);

    }



    public List GenerateDotFont(TextBlock ReferenceTextBlock,int Space)
    {

        int Width = (int)ReferenceTextBlock.Width;
        int Height = (int)ReferenceTextBlock.Height;

        FormattedText text = new FormattedText(ReferenceTextBlock.Text,
                CultureInfo.CurrentCulture,
                FlowDirection.LeftToRight,
                new Typeface(ReferenceTextBlock.FontFamily, ReferenceTextBlock.FontStyle, ReferenceTextBlock.FontWeight, ReferenceTextBlock.FontStretch),
                ReferenceTextBlock.FontSize, ReferenceTextBlock.Foreground);

        DrawingVisual DrawingVisual = new DrawingVisual();
        DrawingContext DrawingContext = DrawingVisual.RenderOpen();
        DrawingContext.DrawText(text, new Point(0, 0));
        DrawingContext.Close();

        RenderTargetBitmap bmp = new RenderTargetBitmap(Width, Height, 96, 96, PixelFormats.Pbgra32);
        bmp.Render(DrawingVisual);

        BmpBitmapEncoder Encoder = new BmpBitmapEncoder();
        Encoder.Frames.Add(BitmapFrame.Create(bmp));

        MemoryStream MemoryStream = new MemoryStream();
        Encoder.Save(MemoryStream);

        // Header Skip
        MemoryStream.Seek(54, SeekOrigin.Begin);

        byte[] Buff = new byte[MemoryStream.Length - 54];
        MemoryStream.Read(Buff, 0, (int)(MemoryStream.Length - 54));

        List Result = new List();
        int HeightOffSet = 0;
        for (int Y = 0; Y < Height; Y+=Space)
        {
            HeightOffSet = Width * Y;

            for (int X = 0; X < Width; X+=Space)
            {
                if (Buff[((HeightOffSet + X) << 2 )] == 255)
                    Result.Add(new Point(X, Height - Y));

            }
        }

        return Result;

    }

}