//下载示例 http://files.cnblogs.com/kaixin110/demo.rar


using  System;
 using  System.Collections.Generic;
 using  System.Text;
 using  System.Collections;

 using  System.Drawing;
 using  System.Drawing.Imaging;
 using  System.Drawing.Drawing2D;

 namespace  Haix.Utils
 {
    class GenerateImage
    {        
        public struct favoriteImage
        { 
            private string _imagePath;            
            private int _x;
            private int _y;
            
            public int x
            {
                get 
                {
                    return _x; 
                }
                set 
                {
                    _x  = value;
                }
            }

            public int y
            {
                get
                {
                    return _y;
                }
                set
                {
                    _y = value;
                }
            }

            public string imagePath
            {
                get
                {
                    return _imagePath;
                }
                set
                {
                    _imagePath = value;
                }
            }
        }        

        [STAThread]
        static void Main(string[] args)
        {
            string CurrentDirectory = System.Environment.CurrentDirectory;
            string body_path=CurrentDirectory + "//white.png"; 

            favoriteImage[] FaImage = new favoriteImage[2];
            
            FaImage[0].x = -3;
            FaImage[0].y = 70;
            FaImage[0].imagePath = CurrentDirectory + "//1.png";

            FaImage[1].x = 20;//65;
            FaImage[1].y = -12;
            FaImage[1].imagePath = CurrentDirectory + "//2.png";

            generateWinterMark(CurrentDirectory,body_path, FaImage);
        }

        /// <summary>
        /// 生成水印
        /// </summary>
        /// <param name="Main">主图片路径,eg:body</param>
        /// <param name="Child">要叠加的图片路径</param>
        /// <param name="x">要叠加的图片位置的X坐标</param>
        /// <param name="y">要叠加的图片位置的Y坐标</param>
        /// <param name="isSave"></param>
        /// <returns>生成图片的路径</returns>        
        private static string generateWinterMark(string savePath,string body_path,favoriteImage[] favorite)
        {
            //create a image object containing the photograph to watermark
            Image imgPhoto = Image.FromFile(body_path);
            int phWidth = imgPhoto.Width;
            int phHeight = imgPhoto.Height;

            //create a Bitmap the Size of the original photograph
            Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);

            //设置此 Bitmap 的分辨率。 
            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            //load the Bitmap into a Graphics object 
            Graphics grPhoto = Graphics.FromImage(bmPhoto);
            //Set the rendering quality for this Graphics object
            grPhoto.SmoothingMode = SmoothingMode.AntiAlias;//清除锯齿的呈现
 //haix
            for (int i = 0; i < favorite.Length; i++)
            {  
            //Draws the photo Image object at original size to the graphics object.
            grPhoto.DrawImage(
                imgPhoto,                               // Photo Image object
                new Rectangle(0, 0, phWidth, phHeight), // Rectangle structure
                0,                                      // x-coordinate of the portion of the source image to draw. 
                0,                                      // y-coordinate of the portion of the source image to draw. 
                phWidth,                                // Width of the portion of the source image to draw. 
                phHeight,                               // Height of the portion of the source image to draw. 
                GraphicsUnit.Pixel);                    // Units of measure 

             
                //------------------------------------------------------------
                //Step #2 - Insert Property image,For example:hair,skirt,shoes etc.
                //------------------------------------------------------------
                //create a image object containing the watermark
                Image imgWatermark = new Bitmap(favorite[i].imagePath);
                int wmWidth = imgWatermark.Width;
                int wmHeight = imgWatermark.Height;
                

                //Create a Bitmap based on the previously modified photograph Bitmap
                Bitmap bmWatermark = new Bitmap(bmPhoto);
                bmWatermark.MakeTransparent(); //使默认的透明颜色对此 Bitmap 透明。

                //bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
                //Load this Bitmap into a new Graphic Object
                Graphics grWatermark = Graphics.FromImage(bmWatermark);


                int xPosOfWm = favorite[i].x;
                int yPosOfWm = favorite[i].y;

                //叠加
                grWatermark.DrawImage(imgWatermark,new Rectangle(xPosOfWm, yPosOfWm, wmWidth, wmHeight),  //Set the detination Position
                0,                  // x-coordinate of the portion of the source image to draw. 
                0,                  // y-coordinate of the portion of the source image to draw. 
                wmWidth,            // Watermark Width
                wmHeight,            // Watermark Height
                GraphicsUnit.Pixel, // Unit of measurment
                null);   //ImageAttributes Object


                //Replace the original photgraphs bitmap with the new Bitmap
                imgPhoto = bmWatermark;

                //grWatermark.Dispose();
                //imgWatermark.Dispose();
                //grPhoto.Dispose();                
                //bmWatermark.Dispose();
            }
            //haix

            string nowTime = DateTime.Now.Year.ToString()+DateTime.Now.Month.ToString()+DateTime.Now.Day.ToString();
            nowTime += DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString();

            string saveImagePath = savePath + "//FA" + nowTime + ".png";
            
            //save new image to file system.
            imgPhoto.Save(saveImagePath, ImageFormat.Png);            
            imgPhoto.Dispose();
        

            return saveImagePath;
        }
    }
}

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版权声明：本文为CSDN博主「思月行云」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/kenkao/article/details/3047511