TextRenderingHint 枚举

定义

命名空间:

System.Drawing.Text

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v8.0.0

Source:

TextRenderingHint.cs

指定文本呈现的质量。

public enum class TextRenderingHint

public enum TextRenderingHint

type TextRenderingHint = 

Public Enum TextRenderingHint

继承

Object

ValueType

Enum

TextRenderingHint

字段

AntiAlias	4	在无提示的情况下使用每个字符的抗锯齿效果标志符号位图来绘制字符。 由于采用了 AntiAlias，质量会得到改善。 由于关闭了提示，主干宽度差可能会比较明显。
AntiAliasGridFit	3	在有提示的情况下使用每个字符的抗锯齿效果标志符号位图来绘制字符。 由于采用了 AntiAlias，质量会得到大大改善，但同时会增加性能成本。
ClearTypeGridFit	5	在有提示的情况下使用每个字符的标志符号 ClearType 位图来绘制字符。 这是质量最高的设置。 用于利用 ClearType 字体功能。
SingleBitPerPixel	2	使用每个字符的标志符号位图来绘制字符。 不使用提示。
SingleBitPerPixelGridFit	1	使用每个字符的标志符号位图来绘制字符。 提示用于改善字符在主干和弯曲部分的外观。
SystemDefault	0	在有系统默认呈现提示的情况下使用每个字符的标志符号位图来绘制字符。 将采用用户为系统选择的任何字体修匀设置来绘制文本。

示例

下面的代码示例演示如何使用 TextRenderingHint 和 TextContrast 属性和 TextRenderingHint 枚举。

此示例旨在与 Windows 窗体 一起使用。 将代码粘贴到窗体中，并在处理窗体的 Paint 事件时调用 ChangeTextRenderingHintAndTextContrast 方法，作为 ePaintEventArgs传递。

private:
   void ChangeTextRenderingHintAndTextContrast( PaintEventArgs^ e )
   {
      // Retrieve the graphics object.
      Graphics^ formGraphics = e->Graphics;

      // Declare a new font.
      System::Drawing::Font^ myFont = gcnew System::Drawing::Font( FontFamily::GenericSansSerif,20,FontStyle::Regular );

      // Set the TextRenderingHint property.
      formGraphics->TextRenderingHint = System::Drawing::Text::TextRenderingHint::SingleBitPerPixel;

      // Draw the string.
      formGraphics->DrawString( "Hello World", myFont, Brushes::Firebrick, 20.0F, 20.0F );

      // Change the TextRenderingHint property.
      formGraphics->TextRenderingHint = System::Drawing::Text::TextRenderingHint::AntiAliasGridFit;

      // Draw the string again.
      formGraphics->DrawString( "Hello World", myFont, Brushes::Firebrick, 20.0F, 60.0F );

      // Set the text contrast to a high-contrast setting.
      formGraphics->TextContrast = 0;

      // Draw the string.
      formGraphics->DrawString( "Hello World", myFont, Brushes::DodgerBlue, 20.0F, 100.0F );

      // Set the text contrast to a low-contrast setting.
      formGraphics->TextContrast = 12;

      // Draw the string again.
      formGraphics->DrawString( "Hello World", myFont, Brushes::DodgerBlue, 20.0F, 140.0F );

      // Dispose of the font object.
      delete myFont;
   }

private void ChangeTextRenderingHintAndTextContrast(PaintEventArgs e)
{

    // Retrieve the graphics object.
    Graphics formGraphics = e.Graphics;

    // Declare a new font.
    Font myFont = new Font(FontFamily.GenericSansSerif, 20, 
        FontStyle.Regular);

    // Set the TextRenderingHint property.
    formGraphics.TextRenderingHint = 
        System.Drawing.Text.TextRenderingHint.SingleBitPerPixel;

    // Draw the string.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.Firebrick, 20.0F, 20.0F);

    // Change the TextRenderingHint property.
    formGraphics.TextRenderingHint = 
        System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;

    // Draw the string again.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.Firebrick, 20.0F, 60.0F);

    // Set the text contrast to a high-contrast setting.
    formGraphics.TextContrast = 0;

    // Draw the string.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.DodgerBlue, 20.0F, 100.0F);

    // Set the text contrast to a low-contrast setting.
    formGraphics.TextContrast = 12;

    // Draw the string again.
    formGraphics.DrawString("Hello World", myFont, 
        Brushes.DodgerBlue, 20.0F, 140.0F);

    // Dispose of the font object.
    myFont.Dispose();
}

Private Sub ChangeTextRenderingHintAndTextContrast(ByVal e As _
    PaintEventArgs)

    ' Retrieve the graphics object.
    Dim formGraphics As Graphics = e.Graphics

    ' Declare a new font.
    Dim myFont As Font = New Font(FontFamily.GenericSansSerif, _
        20, FontStyle.Regular)

    ' Set the TextRenderingHint property.
    formGraphics.TextRenderingHint = _
        System.Drawing.Text.TextRenderingHint.SingleBitPerPixel

    ' Draw the string.
    formGraphics.DrawString("Hello World", myFont, _
        Brushes.Firebrick, 20.0F, 20.0F)

    ' Change the TextRenderingHint property.
    formGraphics.TextRenderingHint = _
        System.Drawing.Text.TextRenderingHint.AntiAliasGridFit

    ' Draw the string again.
    formGraphics.DrawString("Hello World", myFont, _
        Brushes.Firebrick, 20.0F, 60.0F)

    ' Set the text contrast to a high-contrast setting.
    formGraphics.TextContrast = 0

    ' Draw the string.
    formGraphics.DrawString("Hello World", myFont, _
        Brushes.DodgerBlue, 20.0F, 100.0F)

    ' Set the text contrast to a low-contrast setting.
    formGraphics.TextContrast = 12

    ' Draw the string again.
    formGraphics.DrawString("Hello World", myFont, _
        Brushes.DodgerBlue, 20.0F, 140.0F)

    ' Dispose of the font object.
    myFont.Dispose()

End Sub

注解

质量范围从文本 (性能最快，但质量) 最低，到抗锯齿文本 (更好的质量，但性能较慢，) ClearType 文本 (LCD 显示器) 上的最佳质量。