图像切割的方法

素颜马尾好姑娘i 2022-06-14 10:21 129阅读 0赞

图像切割的方法：

public class ImageManager
    {
      /// <summary>
      /// 图像切割
      /// </summary>
      /// <param name="url">图像文件名称</param>
      /// <param name="width">切割后图像宽度</param>
      /// <param name="height">切割后图像高度</param>
      /// <param name="savePath">切割后图像文件保存路径</param>
      /// <param name="fileExt">切割后图像文件扩展名</param>
      public static void Cut(string url, int width, int height,string savePath,string fileExt,string logofile)
      {
       Bitmap bitmap = new Bitmap(url);
       Decimal MaxRow = Math.Ceiling((Decimal)bitmap.Height / height);
       Decimal MaxColumn = Math.Ceiling((decimal)bitmap.Width / width);
       for (decimal i = 0; i < MaxRow; i++)
       {
        for (decimal j = 0; j < MaxColumn; j++)
        {
         string filename = i.ToString() + "," + j.ToString() + "." + fileExt;
         Bitmap bmp = new Bitmap(width, height);
         for (int offsetX = 0; offsetX < width; offsetX++)
         {
          for (int offsetY = 0; offsetY < height; offsetY++)
          {
           if (((j * width + offsetX) < bitmap.Width) && ((i * height + offsetY) < bitmap.Height))
           {
            bmp.SetPixel(offsetX, offsetY, bitmap.GetPixel((int)(j * width + offsetX), (int)(i * height + offsetY)));
           }
          }
         }
         Graphics g = Graphics.FromImage(bmp);
         g.DrawString("脚本之家", new Font("黑体", 20), new SolidBrush(Color.FromArgb(70, Color.WhiteSmoke)), 60, height/2);//加水印
         ImageFormat format = ImageFormat.Png;
         switch (fileExt.ToLower())
         {
          case "png":
           format = ImageFormat.Png;
           break;
          case "bmp":
           format = ImageFormat.Bmp;
           break;
          case "gif":
           format = ImageFormat.Gif;
           break;
         }
         bmp.Save(savePath+"//" + filename,format);
        }
       }
      }
    }