NetCore使用SixLabors组件生成图片

主要用到SixLabors.Fonts(2.1.0)和SixLabors.ImageSharp.Drawing(2.1.0)组件

这里我把组件创建成一个单独的类库，供其他模块来同意调用

ISixLaborsExtensions.cs

using SixLabors.Fonts;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Drawing.Processing;
using SixLabors.ImageSharp.Processing;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

namespace Tzkj.SixLabors
{
??? public interface ISixLaborsExtensions
??? {
??????? /// <summary>
??????? /// 生成会员证书
??????? /// </summary>
??????? /// <param name="numX"></param>
??????? /// <param name="numY"></param>
??????? /// <param name="nameX"></param>
??????? /// <param name="nameY"></param>
??????? /// <param name="yearX"></param>
??????? /// <param name="yearY"></param>
??????? /// <param name="mounthX"></param>
??????? /// <param name="mounthY"></param>
??????? /// <param name="DayX"></param>
??????? /// <param name="DayY"></param>
??????? /// <returns></returns>
??????? Task<SixLaborOptions> GenerateMembershipCertificateAsync(string companyName, string orderNo, bool isAdd = true, int numX = 700, int numY = 560, int nameX = 540, int nameY = 665, int yearX = 1488, int yearY = 1155,
??????????? int mounthX = 1612, int mounthY = 1155, int DayX = 1706, int DayY = 1155);
??? }
}

SixLaborsExtensions.cs

using Org.BouncyCastle.Asn1;
using SixLabors.Fonts;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Drawing.Processing;
using SixLabors.ImageSharp.Processing;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tzkj.Core.Constants;
using Tzkj.Core.System;
using Volo.Abp.DependencyInjection;

namespace Tzkj.SixLabors
{
??? public class SixLaborsExtensions : ISixLaborsExtensions, IScopedDependency
??? {
??????? private readonly FontCollection _fontCollection;

??????? public SixLaborsExtensions(FontCollection fontCollection)
??????? {
??????????? _fontCollection = fontCollection;
??????? }

??????? /// <summary>
??????? /// 生成会员证书
??????? /// <paramref name="companyName">名称</param>
??????? /// <param name="numX"></param>
??????? /// <param name="numY"></param>
??????? /// <param name="nameX"></param>
??????? /// <param name="nameY"></param>
??????? /// <param name="yearX"></param>
??????? /// <param name="yearY"></param>
??????? /// <param name="mounthX"></param>
??????? /// <param name="mounthY"></param>
??????? /// <param name="DayX"></param>
??????? /// <param name="DayY"></param>
??????? /// <returns></returns>
??????? public async Task<SixLaborOptions> GenerateMembershipCertificateAsync(string companyName, string orderNo,
??????????? bool isAdd = true,
??????????? int numX = 700, int numY = 560, int nameX = 540, int nameY = 665, int yearX = 1488, int yearY = 1155,
??????????? int mounthX = 1612, int mounthY = 1155, int DayX = 1706, int DayY = 1155)
??????? {
??????????? using var img = await Image.LoadAsync("wwwroot/robotMember.jpg");
??????????? _fontCollection.TryGet("FangSong", out FontFamily fontFamily);
??????????? string? numberNo = orderNo;
??????????? using var img2 = img.Clone(ctx => ApplyScalingWaterMarkRobot(ctx, fontFamily, Color.Black,
??????????????? companyName, orderNo, isAdd, out numberNo, numX, numY, nameX, nameY, yearX, yearY, mounthX, mounthY, DayX, DayY));
??????????? using var memoryStream = new MemoryStream();
??????????? await img2.SaveAsJpegAsync(memoryStream);
??????????? var tt = memoryStream.ToArray();

??????????? return new SixLaborOptions
??????????? {
??????????????? ImgBytes = tt,
??????????????? CertificateNo = numberNo
??????????? };
??????? }

??????? private IImageProcessingContext ApplyScalingWaterMarkRobot(IImageProcessingContext processingContext,
??????????? FontFamily fontFamily, Color color, string companyName, string orderNo, bool isAdd, out string numberNo, int numX = 494, int numY = 528, int nameX = 450, int nameY = 650, int yearX = 650, int yearY = 736,
??????????? int mounthX = 896, int mounthY = 736, int DayX = 990, int DayY = 736)
??????? {
??????????? var numPoint = new PointF(numX, numY);
??????????? Font numFont = fontFamily.CreateFont(38);
??????????? var numTextOptions = new RichTextOptions(numFont)
??????????? {
??????????????? Origin = numPoint
??????????? };
??????????? //processingContext.DrawText(numTextOptions, "HRES20231225001", color);
??????????? numberNo = orderNo;
??????????? if (isAdd)
??????????? {
??????????????? numberNo = GenerateOrderNo.Gener(orderNo, SystemConstants.MemberCardPrefix);
??????????? }

??????????? processingContext.DrawText(numTextOptions, numberNo, color);

??????????? var namePoint = new PointF(nameX, nameY);
??????????? Font nameFont = fontFamily.CreateFont(48);
??????????? var nameTextOptions = new RichTextOptions(nameFont)
??????????? {
??????????????? Origin = namePoint
??????????? };
??????????? processingContext.DrawText(nameTextOptions, companyName, color);

??????????? var yearPoint = new PointF(yearX, yearY);
??????????? var monthPoint = new PointF(mounthX, mounthY);
??????????? var dayPoint = new PointF(DayX, DayY);
??????????? Font dateFont = fontFamily.CreateFont(38);

??????????? processingContext
??????????????? .DrawText(
??????????????????? new RichTextOptions(dateFont)
??????????????????? {
??????????????????????? Origin = yearPoint
??????????????????? },
??????????????????? "2023",
??????????????????? color)
??????????????? .DrawText(
??????????????????? new RichTextOptions(dateFont)
??????????????????? {
??????????????????????? Origin = monthPoint
??????????????????? },
??????????????????? "06",
??????????????????? color)
??????????????? .DrawText(
??????????????????? new RichTextOptions(dateFont)
??????????????????? {
??????????????????????? Origin = dayPoint
??????????????????? },
??????????????????? "26",
??????????????????? color);

??????????? return processingContext;
??????? }
??? }
}

?

SixLaborsModule.cs

using Microsoft.Extensions.DependencyInjection;
using SixLabors.Fonts;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Volo.Abp.Modularity;

namespace Tzkj.SixLabors
{
??? public class SixLaborsModule : AbpModule
??? {
??????? public override void ConfigureServices(ServiceConfigurationContext context)
??????? {
??????????? //var configuration = context.Services.GetConfiguration();

??????????? //图片合成组件单例注入
??????????? context.Services.AddSingleton<FontCollection>(serviceProvider =>
??????????? {
??????????????? FontCollection fontCollection = new();
??????????????? fontCollection.Add("./wwwroot/Fonts/simfang.ttf");
??????????????? //fontCollection.Add(configuration["SixLabors:FontsPath"]);
??????????????? return fontCollection;
??????????? });
??????? }
??? }
}

SixLaborOptions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Tzkj.SixLabors
{
??? public class SixLaborOptions
??? {
??????? /// <summary>
??????? /// 证书编号
??????? /// </summary>
??????? public string CertificateNo { get; set; }

??????? /// <summary>
??????? /// 二进制图片
??????? /// </summary>
??????? public byte[] ImgBytes { get; set; }
??? }
}

controller.cs

??????? /// <summary>
??????? /// 获取会员证书
??????? /// </summary>
??????? /// <param name="id">企业id</param>
??????? /// <returns></returns>
??????? [HttpGet("get-memberCard")]
??????? public async Task<IActionResult> GetMemberCardUrlAsync(Guid id)
??????? {
??????????? byte[] bytes = await _companyInfoService.GetMemberCardUrlAsync(id);
??????????? var qualification = File(bytes, "image/jpeg");

??????????? return qualification;
??????? }