1   var path = "Image/Mud.png"                                  //图片路径
 2   FontCollection fonts = new FontCollection();
 3   FontFamily fontfamily = fonts.Install("Source/SIMHEI.TTF"); //字体的路径     var font  = new Font(fontfamily,50);
 4   using (Image<Rgba32> image = Image.Load(path))
 5   {
 6       image.Mutate(x => x.         DrawText (
 8                 "陆家嘴旗舰店",           //文字内容
 9                 font,
10                 Rgba32.Black,           //文字颜色
11                 new PointF(100,100))    //坐标位置（浮点）
12          );
13      image.Save(path);
14    }

//线上地址的图片，通过获取流的方式读取
WebRequest imgRequest = WebRequest.Create(url);
var res = (HttpWebResponse)imgRequest.GetResponse();
var image  = Image.Load(res.GetResponseStream());

  var str = "我是什么长度"；
  var size = TextMeasurer.Measure(str, new RendererOptions(new Font(fontfamily,50)));  var width = size.Width;

 1 using SixLabors.ImageSharp;
 2 using SixLabors.ImageSharp.PixelFormats;
 3 using SixLabors.ImageSharp.Processing;
 4 using SixLabors.Primitives;
 5 using SixLabors.Shapes;
 6 using System;
 7 using System.Collections.Generic;
 8 using System.Text;
 9
10 namespace CodePicDownload
11 {
12     public static class CupCircularHelper
13     {
14
15         public static IImageProcessingContext<Rgba32> ConvertToAvatar(this IImageProcessingContext<Rgba32> processingContext, Size size, float cornerRadius)
16         {
17             return processingContext.Resize(new ResizeOptions
18             {
19                 Size = size,
20                 Mode = ResizeMode.Crop
21             }).Apply(i => ApplyRoundedCorners(i, cornerRadius));
22         }
23
24
25         // This method can be seen as an inline implementation of an `IImageProcessor`:
26         // (The combination of `IImageOperations.Apply()` + this could be replaced with an `IImageProcessor`)
27         private static void ApplyRoundedCorners(Image<Rgba32> img, float cornerRadius)
28         {
29             IPathCollection corners = BuildCorners(img.Width, img.Height, cornerRadius);
30
31             var graphicOptions = new GraphicsOptions(true)
32             {
33                 AlphaCompositionMode = PixelAlphaCompositionMode.DestOut // enforces that any part of this shape that has color is punched out of the background
34             };
35             // mutating in here as we already have a cloned original
36             // use any color (not Transparent), so the corners will be clipped
37             img.Mutate(x => x.Fill(graphicOptions, Rgba32.LimeGreen, corners));
38         }
39
40         private static IPathCollection BuildCorners(int imageWidth, int imageHeight, float cornerRadius)
41         {
42             // first create a square
43             var rect = new RectangularPolygon(-0.5f, -0.5f, cornerRadius, cornerRadius);
44
45             // then cut out of the square a circle so we are left with a corner
46             IPath cornerTopLeft = rect.Clip(new EllipsePolygon(cornerRadius - 0.5f, cornerRadius - 0.5f, cornerRadius));
47
48             // corner is now a corner shape positions top left
49             //lets make 3 more positioned correctly, we can do that by translating the orgional artound the center of the image
50
51             float rightPos = imageWidth - cornerTopLeft.Bounds.Width + 1;
52             float bottomPos = imageHeight - cornerTopLeft.Bounds.Height + 1;
53
54             // move it across the width of the image - the width of the shape
55             IPath cornerTopRight = cornerTopLeft.RotateDegree(90).Translate(rightPos, 0);
56             IPath cornerBottomLeft = cornerTopLeft.RotateDegree(-90).Translate(0, bottomPos);
57             IPath cornerBottomRight = cornerTopLeft.RotateDegree(180).Translate(rightPos, bottomPos);
58
59             return new PathCollection(cornerTopLeft, cornerBottomLeft, cornerTopRight, cornerBottomRight);
60         }
61   }
62 }

1 using (Image<Rgba32> image = Image.Load("Image/Mud.png"))
2 {
3     var logoWidth = 300;
4     var logo = Image.Load("Image/Logo.png")5     logo.Mutate(x => x.ConvertToAvatar(new Size(logoWidth, logoWidth), logoWidth / 2));
6     image.Mutate(x => x.DrawImage(logo, new Point(100, 100), 1));
7     Image.Save("..");

8 }

 1         public void WriteToStream(BitMatrix QrMatrix, ImageFormat imageFormat, Stream stream)
 2         {
 3             if (imageFormat != ImageFormat.Exif && imageFormat != ImageFormat.Icon && imageFormat != ImageFormat.MemoryBmp)
 4             {
 5                 DrawingSize size = m_iSize.GetSize(QrMatrix?.Width ?? 21);
 6                 using (Bitmap bitmap = new Bitmap(size.CodeWidth, size.CodeWidth))
 7                 {
 8                     using (Graphics graphics = Graphics.FromImage(bitmap))
 9                     {
10                         Draw(graphics, QrMatrix);
11                         bitmap.Save(stream, imageFormat);
12                     }
13                 }
14             }
15         }

1 //Matrix为BitMatrix类型数据，ImageFormat我选择了png类型
2 MemoryStream ms = new MemoryStream();
3 WriteToStream(Matrix,System.Drawing.Imaging.ImageFormat.Png, ms);
4 byte[] data = new byte[ms.Length];
5 ms.Seek(0, SeekOrigin.Begin);
6 ms.Read(data, 0, Convert.ToInt32(ms.Length));
7 var image =  Image.Load(new MemoryStream(data));