OLSBackend_Common/JiaZhiQuan.Common/Utils/ImageSuperposeUtils.cs

using Microsoft.AspNetCore.Razor.TagHelpers;
using Newtonsoft.Json;
using NLog.Fluent;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Drawing.Text;
using System.IO;
using System.Numerics;
using Wicture.DbRESTFul;
using static System.Net.Mime.MediaTypeNames;
using Image = System.Drawing.Image;

namespace JiaZhiQuan.Common.Utils
{
    public static class ImageSuperposeUtils
    {
        /// <summary>
        /// 将内容添加到底图上，返回流
        /// </summary>
        /// <param name="dto"></param>
        /// <returns>Stream图片流, Png格式</returns>
        public static Stream AddContextToImage(ImageSuperposeDTO dto)
        {
            try
            {
                // 复制原始图片到临时文件夹（复制一个防止同时修改同一个图片）
                File.Copy(dto.OriginImagePath, dto.TempImagePath, true);
                // 加载原始图片
                using Image originalImage = Image.FromFile(dto.TempImagePath);
                using Graphics graphics = Graphics.FromImage(originalImage);
                // 循环//处理所有叠加内容
                foreach (var item in dto.SuperposeDetails)
                {
                    if (item.Type == SuperposeType.Text)
                    {
                        var text = item.Text;
                        // 设置绘制文本的字体、大小和颜色
                        System.Drawing.Font font = new System.Drawing.Font(text.FamilyName, text.FontSize);
                        Brush brush = new SolidBrush(text.Color);
                        Point position = new Point(item.X, item.Y);
                        // 绘制文本
                        graphics.DrawString(text.Text, font, brush, new Point(item.X, item.Y));
                    }
                    else if (item.Type == SuperposeType.Image)
                    {
                        // 读取需要叠加的图片
                        var image = Image.FromFile(item.Image.ImagePath);
                        if (item.Image.isFillet)
                        {
                            image = DrawTransparentRoundCornerImage(image);
                        }
                        // 设置坐标宽高
                        int width = item.Image.Width is null ? image.Width : item.Image.Width.Value,
                            height = item.Image.Height is null ? image.Height : item.Image.Height.Value;
                        var rectangle = new Rectangle(item.X, item.Y, width, height);
                        graphics.DrawImage(image, rectangle);
                    }
                    else if (item.Type == SuperposeType.ImageStream)
                    {
                        if (item.ImageStream is null)
                        {
                            LoggerManager.Logger.Error("生成用户海报失败，图片流为空。参数：" + JsonConvert.SerializeObject(item));
                        }
                        // 设置坐标宽高
                        int width = item.ImageStream.Width.Value,
                            height = item.ImageStream.Height.Value;
                        // 读取需要叠加的图片
                        var image = Image.FromStream(item.ImageStream.ImageStream);
                        // 判断图片大小是否需要缩放
                        if (image.Width != width || image.Height != height)
                        {
                            image = ScaleImage(image, width, height);
                        }
                        // 是否圆角
                        if (item.ImageStream.isFillet)
                        {
                            image = DrawTransparentRoundCornerImage(image);
                        }
                        var rectangle = new Rectangle(item.X, item.Y, width, height);
                        graphics.DrawImage(image, rectangle);
                        image.Dispose();
                    }
                }

                // 保存修改后的图片
                //originalImage.Save($@"C:\Users\gy\Pictures\海报\{dto.FileName}");

                MemoryStream stream = new MemoryStream();
                originalImage.Save(stream, ImageFormat.Png);
                stream.Seek(0, SeekOrigin.Begin);
                return stream;
            }
            finally
            {
                File.Delete(dto.TempImagePath);
            }
        }

        /// <summary>
        /// 图片更改圆角
        /// </summary>
        /// <param name="image"></param>
        /// <returns></returns>
        private static Image DrawTransparentRoundCornerImage(Image image)
        {
            Bitmap bm = new Bitmap(image.Width, image.Height);
            using Graphics g = Graphics.FromImage(bm);
            g.FillRectangle(Brushes.Transparent, new Rectangle(0, 0, image.Width, image.Height));
            // 将画布的区域设置为透明
            g.Clear(Color.Transparent);
            // 设置绘制质量为高质量
            g.SmoothingMode = SmoothingMode.HighQuality;
            // 创建一个圆形路径
            GraphicsPath path = new GraphicsPath();
            path.AddEllipse(0, 0, bm.Width, bm.Height);
            // 将剪辑区域设置为圆形路径
            g.SetClip(path);
            // 在剪辑区域内绘制原始图像
            g.DrawImage(image, 0, 0);
            // 清除剪辑区域，以便添加边框
            g.ResetClip();
            // 添加3px白色边框
            using (Pen borderPen = new Pen(Color.White, 3))
            {
                g.DrawEllipse(borderPen, 1, 1, bm.Width - 3, bm.Height - 3);
            }
            return bm;
        }

        /// <summary>
        /// 缩放图片
        /// </summary>
        /// <param name="originalImage"></param>
        /// <param name="newWidth"></param>
        /// <param name="newHeight"></param>
        /// <returns></returns>
        public static Bitmap ScaleImage(Image originalImage, int newWidth, int newHeight)
        {
            // 创建目标尺寸的位图对象
            Bitmap scaledImage = new Bitmap(newWidth, newHeight);

            // 使用 Graphics 类进行绘制
            using (Graphics graphics = Graphics.FromImage(scaledImage))
            {
                // 设置绘制质量，可根据需要调整
                graphics.CompositingQuality = CompositingQuality.HighQuality;
                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                graphics.SmoothingMode = SmoothingMode.HighQuality;

                // 绘制缩放后的图片
                graphics.DrawImage(originalImage, 0, 0, newWidth, newHeight);
            }
            return scaledImage;
        }
    }

    public class ImageSuperposeDTO
    {
        /// <summary>
        /// 文件名
        /// </summary>
        public string FileName { get; set; }

        /// <summary>
        /// 原始图片路径
        /// </summary>
        public string OriginImagePath { get; set; }

        /// <summary>
        /// 临时图片路径（需要对原始图片复制一个进行操作）
        /// </summary>
        public string TempImagePath { get; set; }

        /// <summary>
        /// 叠加内容详情
        /// </summary>
        public List<ImageSuperposeDetails> SuperposeDetails { get; set; }

        public void Clear()
        {
            foreach (var item in SuperposeDetails)
            {
                if (item.Type == SuperposeType.ImageStream)
                {
                    item.ImageStream.ImageStream.Close();
                }
            }
        }

    }

    /// <summary>
    /// 图片叠加操作类型
    /// </summary>
    public enum SuperposeType
    {
        Text = 0,
        Image = 1,
        ImageStream = 2,
        ComplexText = 3
    }

    public class ImageSuperposeDetails
    {
        /// <summary>
        /// 叠加内容类型
        /// </summary>
        public SuperposeType Type { get; set; }

        /// <summary>
        /// 叠加的文字详情
        /// SuperposeType.Text时，Text不能为空
        /// </summary>
        public ImageSuperposeTextDetails Text { get; set; }

        /// <summary>
        /// 叠加的图片路径
        /// SuperposeType.Image时，Image不能为空
        /// </summary>
        public ImageSuperposeImageDetails Image { get; set; }

        /// <summary>
        /// 叠加的图片流
        /// SuperposeType.ImageStream时，ImageStream不能为空
        /// </summary>
        public ImageSuperposeImageStreamDetails ImageStream { get; set; }

        /// <summary>
        /// x坐标
        /// </summary>
        public int X { get; set; }

        /// <summary>
        /// y坐标
        /// </summary>
        public int Y { get; set; }
    }

    /// <summary>
    /// 叠加的文字详情
    /// </summary>
    public class ImageSuperposeTextDetails
    {
        /// <summary>
        /// 叠加的内容
        /// </summary>
        public string Text { get; set; }

        /// <summary>
        /// 叠加内容的颜色
        /// </summary>
        public Color Color { get; set; }

        /// <summary>
        /// 文字大小
        /// </summary>
        public int FontSize { get; set; } = 16;

        /// <summary>
        /// 字体格式
        /// </summary>
        public string FamilyName { get; set; }
    }

    /// <summary>
    /// 叠加的图片详情
    /// </summary>
    public class ImageSuperposeImageDetails
    {
        /// <summary>
        /// 叠加的图片路径
        /// </summary>
        public string ImagePath { get; set; }

        /// <summary>
        /// 宽(如果设置了，那么将覆盖图片默认的宽)
        /// </summary>
        public int? Width { get; set; }

        /// <summary>
        /// 高(如果设置了，那么将覆盖图片默认的高)
        /// </summary>

        public int? Height { get; set; }

        /// <summary>
        /// 是否需要把图片变成圆型
        /// </summary>
        public bool isFillet { get; set; }
    }

    /// <summary>
    /// 叠加的图片流详情
    /// </summary>
    public class ImageSuperposeImageStreamDetails
    {

        /// <summary>
        /// 叠加的图片路径
        /// </summary>
        public Stream ImageStream { get; set; }

        /// <summary>
        /// 宽(如果设置了，那么将覆盖图片默认的宽)
        /// </summary>
        public int? Width { get; set; }

        /// <summary>
        /// 高(如果设置了，那么将覆盖图片默认的高)
        /// </summary>

        public int? Height { get; set; }

        /// <summary>
        /// 是否需要把图片变成圆型
        /// </summary>
        public bool isFillet { get; set; }
    }
}