GDI画图时的锯齿效果弱化

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GDI画图时的锯齿效果弱化
当在画图时，图形有时会出现锯齿，可以使用SmoothingMode.AntiAlias来消除
代码如下：

g.SmoothingMode = SmoothingMode.AntiAlias;

使图像的边缘圆滑清晰锐化的可以试试FillPath
代码如下

g.FillPath((Brushes.Black), path);

或者是

针对于文本锯齿的话，可以采用TextRenderingHint
代码如下

 SolidBrush brush = new SolidBrush(Color.Green);            e.Graphics.DrawString("ABCDEFGHIJKL", new Font("宋体", 15f), brush, 0, 20);            //消除锯齿            e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;            e.Graphics.DrawString("ABCDEFGHIJKL", new Font("宋体", 15f), brush, 0, 50);有时候使用Graphics.Clear()方法，会在图像上出现颗粒型的点，尽量不要采用Graphics.Clear()来填充区域，一般使用Graphics.FillPath();有兴趣的可以尝试下下面的代码：        public Form11()        {            InitializeComponent();            this.BackColor = Color.Black;            Method();            this.Paint += Draw;        }        Bitmap bitmap1;        private void Draw(object sender, PaintEventArgs e)        {            e.Graphics.DrawImage(bitmap1, 0, 0);            e.Graphics.DrawString("ABCDEFGHIJKL", new Font("宋体", 15f), new SolidBrush(Color.Green), 0, 50);         }        private void Method()        {            bitmap1 = new Bitmap(500, 500);            Graphics g = Graphics.FromImage(bitmap1);            GraphicsPath path = new GraphicsPath();            //g.SmoothingMode = SmoothingMode.AntiAlias;  //使绘图质量最高，即消除锯齿            //g.CompositingMode = CompositingMode.SourceCopy;            //g.TextRenderingHint = TextRenderingHint.AntiAlias;                        int alpha = 1;            for (int i = 20; i > 2; i--)            {                path.Reset();                path.AddEllipse(20, 20, 50, 50);                path.Widen(new Pen(Color.Black, i));                g.SetClip(path);                //g.Clear(Color.Black); // wrong                g.ResetClip();                //g.FillPath((Brushes.Black), path); // right                g.FillPath(new SolidBrush(Color.FromArgb(alpha += 10, 255, 255, 255)), path);            }        }

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