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代码
using SixLabors.Fonts;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Draw…安装包 SixLabors.ImageSharp.Drawing 2.0 需要的字体宋体和微软雅黑 商用的需要授权如果商业使用可以使用方正书宋、方正黑体他们可以免费商用 方正官网
代码
using SixLabors.Fonts;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Drawing;
using SixLabors.ImageSharp.Drawing.Processing;
using SixLabors.ImageSharp.Formats.Png;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Processing;namespace CreatePosterStu01
{internal class Program{static async Task Main(string[] args){//画布宽度int canvasWidth 750;//画布高度int canvasHeight 1096;//素材的宽度int posterWidth 670;//素材的高度int posterHeight 810;//二维码宽度int qrCodeWidth 140;//二维码高度int qrCodeHeight 140;//头像宽度和高度int avatorWidth 110;int avatorHeight 110;//昵称var nickName 假装wo不帅;//签名个性签名var diySign \这个真不错推荐你也来看看啊啊啊sdf\;var imgName ${DateTime.Now.ToString(yyyy_MM_dd_HH_mm_ss)}.png;using (ImageRgba32 image new ImageRgba32(canvasWidth, canvasHeight, Color.White)){//绘制顶部图片var topImage Image.Load(images/main.jpg);//也可以加载stream//var qrCodeImage Image.Load(data);//改变显示区域的大小并不能改变图片大小//var posterRect new Rectangle(0,0, posterWidth, posterHeight);//image.Mutate(t t.DrawImage(topImage, new Point(40, 40), posterRect, 1f));//存放海报位置//KnownResamplers.Bicubic 获取实现双三次核算法W(x)的双三次采样器//KnownResamplers.Box 获取实现盒算法的盒采样器。类似于升级时的最近邻居。缩小像素时会对像素进行平均将像素合并在一起。topImage.Mutate(x x.Resize(posterWidth, posterHeight, KnownResamplers.Box));image.Mutate(t t.DrawImage(topImage, new Point(40, 40), 1f));//存放二维码var qrcodeImage Image.Load(images/qrcode.jpg);qrcodeImage.Mutate(x x.Resize(qrCodeWidth, qrCodeHeight, KnownResamplers.Box));image.Mutate(t t.DrawImage(qrcodeImage, new Point(560, 900), 1f));//存放头像var avatorImage Image.Load(images/avator.jpg);//转化为圆角此时有黑色边框avatorImage.Mutate(x x.Resize(avatorWidth, avatorHeight));//avatorImage.Mutate(x x.ConvertToAvatar(new Size(avatorWidth, avatorHeight), (avatorWidth / 2.0f)));image.Mutate(t t.DrawImage(avatorImage, new Point(40, 915), 1f));//显示昵称FontCollection fonts new FontCollection();var songtiFamily fonts.Add(fonts/simsun.ttf);var yaheiFamily fonts.Add(fonts/weiruanyahei.ttf);image.Mutate(t t.DrawText(nickName, new Font(yaheiFamily, 15 * 2, FontStyle.Bold), Color.ParseHex(#000000), new PointF(160, 940)));//显示签名//判断长度决定是否显示...目前一行最多16个字超出部分显示...if (diySign.Length 16){diySign diySign.Remove(15, diySign.Length - 15) ...;}image.Mutate(t t.DrawText(diySign, new Font(yaheiFamily, 13 * 2, FontStyle.Bold), Color.ParseHex(#cccccc), new PointF(160, 985)));var fileStream File.Create(imgName);await image.SaveAsync(fileStream, new PngEncoder());//也可以保存为文件流web端使用/*using (var stream new MemoryStream()){await image.SaveAsync(stream, new PngEncoder());stream.Position 0; return stream;}*/}await Console.Out.WriteLineAsync(完成~~);}}/// summary/// https://github.com/SixLabors/Samples/blob/main/ImageSharp/AvatarWithRoundedCorner/Program.cs/// /summarypublic static class Helper{// Implements a full image mutating pipeline operating on IImageProcessingContextpublic static IImageProcessingContext ConvertToAvatar(this IImageProcessingContext context, Size size, float cornerRadius){return context.Resize(new ResizeOptions{Size size,Mode ResizeMode.Crop}).ApplyRoundedCorners(cornerRadius);}// This method can be seen as an inline implementation of an IImageProcessor:// (The combination of IImageOperations.Apply() this could be replaced with an IImageProcessor)private static IImageProcessingContext ApplyRoundedCorners(this IImageProcessingContext context, float cornerRadius){Size size context.GetCurrentSize();IPathCollection corners BuildCorners(size.Width, size.Height, cornerRadius);context.SetGraphicsOptions(new GraphicsOptions(){Antialias true,// Enforces that any part of this shape that has color is punched out of the background//强制将此形状中任何有颜色的部分从背景中冲压出来AlphaCompositionMode PixelAlphaCompositionMode.DestOut});// Mutating in here as we already have a cloned original// use any color (not Transparent), so the corners will be clipped//在这里突变因为我们已经有了一个克隆的原始使用任何颜色非透明所以角将被剪切foreach (IPath path in corners){context context.Fill(Color.Red, path);}return context;}private static IPathCollection BuildCorners(int imageWidth, int imageHeight, float cornerRadius){// First create a squarevar rect new RectangularPolygon(-0.5f, -0.5f, cornerRadius, cornerRadius);// Then cut out of the square a circle so we are left with a cornerIPath cornerTopLeft rect.Clip(new EllipsePolygon(cornerRadius - 0.5f, cornerRadius - 0.5f, cornerRadius));// Corner is now a corner shape positions top left// lets make 3 more positioned correctly, we can do that by translating the original around the center of the image.float rightPos imageWidth - cornerTopLeft.Bounds.Width 1;float bottomPos imageHeight - cornerTopLeft.Bounds.Height 1;// Move it across the width of the image - the width of the shapeIPath cornerTopRight cornerTopLeft.RotateDegree(90).Translate(rightPos, 0);IPath cornerBottomLeft cornerTopLeft.RotateDegree(-90).Translate(0, bottomPos);IPath cornerBottomRight cornerTopLeft.RotateDegree(180).Translate(rightPos, bottomPos);return new PathCollection(cornerTopLeft, cornerBottomLeft, cornerTopRight, cornerBottomRight);}}
}结果
