需要引用 SixLabors.ImageSharp 和SixLabors.ImageSharp.Drawing
引用方法 NuGet包管理
添加程序包来源 https://www.myget.org/F/imagesharp 包括预览发行版 目前使用的是 1.0.0-beta0005 版本
3个引用
using SixLabors.ImageSharp;using SixLabors.ImageSharp.Formats;using SixLabors.ImageSharp.Processing;
1图片与二维码合并
/// <summary> ???????/// 合并图片 小图片放在大图片上面 ???????/// </summary> ???????/// <param name="TempleBase64Str">模板大图片base64</param> ???????/// <param name="OutputBase64Str">模板小图片base64</param> ???????/// <param name="x">X坐标</param> ???????/// <param name="y">y坐标</param> ???????/// <returns></returns> ???????public ImageResponse MergeImage(string TempleBase64Str, string OutputBase64Str, int x, int y) ???????{ ???????????string strRet = null; ???????????if (string.IsNullOrEmpty(TempleBase64Str)) ???????????{ ???????????????return new ImageResponse { success = false, errmsg = "请传入模板大图片base64" }; ???????????} ???????????if (string.IsNullOrEmpty(OutputBase64Str)) ???????????{ ???????????????return new ImageResponse { success = false, errmsg = "请传入模板小图片base64" }; ???????????} ???????????if (x < 0 || y < 0) ???????????{ ???????????????return new ImageResponse { success = false, errmsg = "坐标不能传入负数" }; ???????????} ???????????try ???????????{ ???????????????byte[] templebytes = Convert.FromBase64String(TempleBase64Str); ???????????????byte[] outputbytes = Convert.FromBase64String(OutputBase64Str); ???????????????IImageFormat format = null; ???????????????var imagesTemle = SixLabors.ImageSharp.Image.Load(templebytes, out format); ???????????????var outputImg = SixLabors.ImageSharp.Image.Load(outputbytes); ???????????????????????????????if (imagesTemle.Height - (outputImg.Height + y) <= 0) ???????????????{ ???????????????????return new ImageResponse { success = false, errmsg = "Y坐标高度超限" }; ???????????????} ???????????????if (imagesTemle.Width - (outputImg.Width + x) <= 0) ???????????????{ ???????????????????return new ImageResponse { success = false, errmsg = "X坐标宽度超限" }; ???????????????} ???????????????//进行多图片处理 ???????????????imagesTemle.Mutate(a => ???????????????{ ???????????????????//还是合并 ????????????????????a.DrawImage(outputImg, 1, new SixLabors.Primitives.Point(x, y)); ???????????????}); ???????????????strRet = imagesTemle.ToBase64String(format); ???????????????return new ImageResponse { success = true, base64Str = strRet }; ???????????} ???????????catch (Exception ex) ????????????{ ???????????????return new ImageResponse { success = false, errmsg ="报错信息"+ex.Message }; ???????????} ???????}2缩小倍数
outputImg.Mutate(ctx => ctx.Resize(outputImg.Width / 2, outputImg.Height / 2));
a.DrawImage(outputImg, 1, new SixLabors.Primitives.Point(x, y)); ??//参数1 范围是0-1 代表的模糊程度
最后生成的图片就是下面的样子 不过返回的是图片的base64字符串
byte[] 也可以转换从成
using (Stream fs = new MemoryStream(bytes))//路径参数using(FileStream streamTemple=System.IO.File.OpenRead("c/图片路径"))using(MemoryStream output=new MemoryStream()){ ???... ???//保存图片 ???imagesTemle.SaveAsJpeg(streamTemple); ???streamTemple.Close(); ???...}这里是 官方文档 所有的功能详情 在这里面 https://sixlabors.github.io/docs/api/index.html 如果对您有用 点个赞呦
.net core 图片合并,图片水印,等比例缩小,SixLabors.ImageSharp
原文地址：https://www.cnblogs.com/AnkerZhang/p/9447815.html