.net - 我可以改进这段代码来绘制轮廓文本吗

Question

我正在使用 GDI+ 绘制一些用黑色轮廓的白色文本。

我尝试使用图形路径，但结果很差(尤其是使用较小的文本尺寸)，因此我考虑在文本周围的 8 个像素位置渲染黑色文本，然后在顶部绘制白色。

结果是我想要的，但代码似乎效率不高。有没有更好的方法来达到相同的结果？

我的代码:

Private _whiteFont As New Font("Segoe UI", 8)
Private _blackFont As New Font("Segoe UI", 8)

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    DrawTextWithOutline("12", New Point(18, 9))
End Sub

Private Sub DrawTextWithOutline(ByVal text As String, ByVal pt As Point)
    Using g As Graphics = Me.CreateGraphics
        g.DrawString(text, _blackFont, Brushes.Black, pt.X - 1, pt.Y) 'left
        g.DrawString(text, _blackFont, Brushes.Black, pt.X, pt.Y + 1) 'top
        g.DrawString(text, _blackFont, Brushes.Black, pt.X + 1, pt.Y) 'right
        g.DrawString(text, _blackFont, Brushes.Black, pt.X, pt.Y + 1) 'bottom
        g.DrawString(text, _blackFont, Brushes.Black, pt.X - 1, pt.Y - 1) 'top left
        g.DrawString(text, _blackFont, Brushes.Black, pt.X - 1, pt.Y + 1) 'bottom left
        g.DrawString(text, _blackFont, Brushes.Black, pt.X + 1, pt.Y - 1) 'top right
        g.DrawString(text, _blackFont, Brushes.Black, pt.X + 1, pt.Y + 1) 'bottom right
        g.DrawString(text, _whiteFont, Brushes.White, pt)
    End Using
End Sub

结果示例:

Answer 1

您没有发布您的 GraphicsPath 尝试，但此版本似乎绘制正常。我使用粗体字体来尝试在内部获得更多空白，并使用 2 像素黑笔来获取轮廓:

e.Graphics.SmoothingMode = SmoothingMode.AntiAlias
Using gp As New GraphicsPath, _
      f As New Font("Segoe UI", 8, FontStyle.Bold), _
      p As New Pen(Brushes.Black, 2)
  gp.AddString(text, f.FontFamily, f.Style, f.Size + 3, New Point(100, 40), _
               StringFormat.GenericTypographic)
  e.Graphics.DrawPath(p, gp)
  e.Graphics.FillPath(Brushes.White, gp)
End Using

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