C# 不同的文本呈现方法不'；我不能生产我想要的

我正在寻找一种文本渲染方法，其中图形对象从位图初始化，在其上绘制文本，文本看起来像附加图像中的第一行

有人能解释一下这样做的方法吗？我不完全理解为什么以下方法都不能复制它：

测试中的字体为：Segoe UI，8.25pt

protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
    base.OnPaint(e);

    //drawing the string with the Graphics object the form gives us
    e.Graphics.DrawString("1. This is a test using DrawString. " + e.Graphics.TextRenderingHint.ToString(), 
                          base.Font, Brushes.Black, new Point(10, 10));

    //width used for all images
    const int width = 300;

    //drawing the string with Graphics objects initialized from bitmaps
    Bitmap bmp = new Bitmap(width, 20);
    using (Graphics gfx = Graphics.FromImage(bmp))
    {
        gfx.PageUnit = GraphicsUnit.Pixel;
        gfx.SmoothingMode = SmoothingMode.HighQuality;
        gfx.DrawString("2. This is a test using DrawString. " + gfx.TextRenderingHint.ToString(), 
                       base.Font, Brushes.Black, Point.Empty);
    }
    e.Graphics.DrawImage(bmp, new Point(10, 30));

    bmp.Dispose();
    bmp = new Bitmap(width, 20);

    using (Graphics gfx = Graphics.FromImage(bmp))
    {
        gfx.PageUnit = GraphicsUnit.Pixel;
        gfx.SmoothingMode = SmoothingMode.HighQuality;
        gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
        gfx.DrawString("3. This is a test using DrawString. " + gfx.TextRenderingHint.ToString(), 
                       base.Font, Brushes.Black, Point.Empty);
    }

    e.Graphics.DrawImage(bmp, new Point(10, 50));

    bmp.Dispose();
    bmp = new Bitmap(width, 20);

    using (Graphics gfx = Graphics.FromImage(bmp))
    {
        gfx.PageUnit = GraphicsUnit.Pixel;
        gfx.SmoothingMode = SmoothingMode.HighQuality;
        gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
        gfx.DrawString("4. This is a test using DrawString. " + gfx.TextRenderingHint.ToString(), 
                       base.Font, Brushes.Black, Point.Empty);
    }

    e.Graphics.DrawImage(bmp, new Point(10, 70));

    bmp.Dispose();
    bmp = new Bitmap(width, 20);

    using (Graphics gfx = Graphics.FromImage(bmp))
    {
        gfx.PageUnit = GraphicsUnit.Pixel;
        gfx.SmoothingMode = SmoothingMode.HighQuality;
        gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
        gfx.DrawString("5. This is a test using DrawString. " + gfx.TextRenderingHint.ToString(),
                       base.Font, Brushes.Black, Point.Empty);
    }

    e.Graphics.DrawImage(bmp, new Point(10, 90));

    bmp.Dispose();
    bmp = new Bitmap(width, 20);

    using (Graphics gfx = Graphics.FromImage(bmp))
    {
        gfx.PageUnit = GraphicsUnit.Pixel;
        gfx.SmoothingMode = SmoothingMode.HighQuality;
        using (GraphicsPath path = new GraphicsPath())
        {
            path.AddString("6. This is a test using GraphicsPath. " + gfx.TextRenderingHint.ToString(), 
                           base.Font.FontFamily, (int)base.Font.Style, 
                           base.Font.Size, Point.Empty, StringFormat.GenericDefault);

            gfx.FillPath(Brushes.Black, path);
        }
    }

    e.Graphics.DrawImage(bmp, new Point(10, 110));

    bmp.Dispose();
    bmp = new Bitmap(width, 20);

    using (Graphics gfx = Graphics.FromImage(bmp))
    {
        gfx.PageUnit = GraphicsUnit.Pixel;
        gfx.SmoothingMode = SmoothingMode.HighQuality;
        gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
        using (GraphicsPath path = new GraphicsPath())
        {
            path.AddString("7. This is a test using GraphicsPath. " + gfx.TextRenderingHint.ToString(),
                           base.Font.FontFamily, (int)base.Font.Style,
                           base.Font.Size, Point.Empty, StringFormat.GenericDefault);

            gfx.FillPath(Brushes.Black, path);
        }
    }

    e.Graphics.DrawImage(bmp, new Point(10, 130));

}

---

您的代码中有一个错误，您忘记初始化位图了。它将被彩色像素填充。透明，黑色，alpha为0。当您绘制文本时，Graphics.DrawString（）将实现您要求的TextRendering提示，对文本进行抗锯齿处理。但是文本的前景色是黑色的。背景颜色是黑色。因此，抗锯齿像素从黑色混合到黑色。它完全破坏了抗锯齿效果，将字母形状变成了一个斑点。修正：

Bitmap bmp = new Bitmap(width, 20);
using (Graphics gfx = Graphics.FromImage(bmp))
{
    gfx.Clear(this.BackColor);
    // etc...
}

---

您是否尝试过

textrendinghint.ClearTypeGridFit

？编辑：如果您使用了“测试4”版本，但使用了

textrendinghint.SystemDefault

，会发生什么情况？+1好问题我以前也遇到过这个问题，但没有提出任何问题question@ChrisSinclairClearTypeGridFit看起来也不像。SystemDefault是初始化图形对象时的默认值，它看起来像#2。是否尝试检查传入

e.graphics

对象的所有属性（如它的

PageUnit

，

SmoothingMode

，

TextContrast

，

InterpolationMode

，等等，以查看它与从

Graphics.FromImage（bmp）

获得的

Graphics.FromImage（bmp）

？@ChrisSinclair是的，唯一不同的是PageUnit属性。）（从图像初始化到显示，表单通过像素）。其他一切都是一样的。这就是为什么我在每个测试用例中设置PageUnit属性。这确实是问题所在。谢谢。