C#实现的一个图片切割工具

效果如图:

工具代码:

  1 using System.Drawing;
  2 using System.Drawing.Imaging;
  3 
  4 class ImageCutterConfig
  5 {
  6     /// <summary>
  7     /// MIME类型，如果用“image/jpeg”切割后的图片会模糊，目前还不知道为啥
  8     /// </summary>
  9     public const string mimeType = @"image/png"; //@"image/jpeg";//
 10 }
 11 
 12 /// <summary>
 13 /// 图形切割配置
 14 /// </summary>
 15 public class GridData
 16 {
 17     /// <summary>
 18     /// 原始图片的文件
 19     /// </summary>
 20     public string SrcFileName = @"D:_lugsProjectsMapCutterSourceMap.jpg";
 21     /// <summary>
 22     /// 切割后的图片输出目录
 23     /// </summary>
 24     public string OutDirectory = @"D:_lugsProjectsMapCutterRes";
 25     /// <summary>
 26     /// 图片宽度
 27     /// </summary>
 28     public int ImageWidth = 3000;
 29     /// <summary>
 30     /// 图片高度
 31     /// </summary>
 32     public int ImageHeight = 1900;
 33     /// <summary>
 34     /// 格子宽度
 35     /// </summary>
 36     public int GridWidth = 256;
 37     /// <summary>
 38     /// 格子高度
 39     /// </summary>
 40     public int GridHeight = 256;
 41     /// <summary>
 42     /// 切片文件前缀
 43     /// </summary>
 44     public string titlePrefixName = "WorldMap_";
 45     /// <summary>
 46     /// 切片文件扩展名
 47     /// </summary>
 48     public string expandedName = @".jpg";
 49 }
 50 
 51 /// <summary>
 52 /// 图片切割工具参数
 53 /// </summary>
 54 class ToolParam
 55 {
 56     public Image srcImage;
 57     public GridData imageData;
 58     public ImageCodecInfo codecInfo;
 59     public EncoderParameters encoderParams;
 60     public int columnNum;
 61     public int rowNum;
 62 
 63     public int columnIndex;
 64     public int rowIndex;
 65 
 66     public ToolParam(Image srcImage, GridData imageData, ImageCodecInfo codecInfo, EncoderParameters encoderParams, int columnNum, int rowNum)
 67     {
 68         this.srcImage = srcImage;
 69         this.imageData = imageData;
 70         this.codecInfo = codecInfo;
 71         this.encoderParams = encoderParams;
 72         this.columnNum = columnNum;
 73         this.rowNum = rowNum;
 74         RefreshIndex(0, 0);
 75     }
 76 
 77     public void RefreshIndex(int columnIndex, int rowIndex)
 78     {
 79         this.columnIndex = columnIndex;
 80         this.rowIndex = rowIndex;
 81     }
 82 }
 83 
 84 class ImageCutterTool
 85 {
 86     /// <summary>
 87     /// 切割图片并保存
 88     /// </summary>
 89     /// <param name="data"></param>
 90     public static void SaveSlice(ToolParam data)
 91     {
 92         int index = data.rowIndex * data.columnNum + data.columnIndex + 1;
 93         int w = data.imageData.GridWidth;
 94         int h = data.imageData.GridHeight;
 95         int x = data.columnIndex * data.imageData.GridWidth;
 96         int y = data.rowIndex * data.imageData.GridHeight;
 97         if ((data.columnIndex + 1) * data.imageData.GridWidth > data.srcImage.Width)
 98         {
 99             w = data.srcImage.Width - data.columnIndex * data.imageData.GridWidth;
100         }
101         if ((data.rowIndex + 1) * data.imageData.GridHeight > data.srcImage.Height)
102         {
103             h = data.srcImage.Height - data.rowIndex * data.imageData.GridHeight;
104         }
105 
106         Bitmap destBitMap = new Bitmap(w, h, PixelFormat.Format24bppRgb);
107         using (Graphics g = Graphics.FromImage(destBitMap))
108         {
109             g.Clear(Color.Transparent);
110             g.DrawImage(data.srcImage, new Rectangle(0, 0, w, h), x, y, w, h, GraphicsUnit.Pixel);
111             string name = data.imageData.OutDirectory + data.imageData.titlePrefixName + index.ToString("D2") + data.imageData.expandedName;
112             destBitMap.Save(name, data.codecInfo, data.encoderParams);
113         }
114     }
115 
116     /// <summary>
117     /// 获取图像编解码器
118     /// </summary>
119     /// <param name="mimeType">MIME类型</param>
120     /// <returns></returns>
121     public static ImageCodecInfo GetEncodeInfo(string mimeType)
122     {
123         ImageCodecInfo[] infos = ImageCodecInfo.GetImageEncoders();
124         for (int i = 0, iMax = infos.Length; i < iMax; ++i)
125         {
126             ImageCodecInfo info = infos[i];
127             if (mimeType == info.MimeType)
128             {
129                 return info;
130             }
131         }
132         return null;
133     }
134 }

测试代码:

 1 using System;
 2 using System.Drawing;
 3 using System.Drawing.Imaging;
 4 using System.Windows;
 5 
 6 class lgs
 7 {
 8     static void Main()
 9     {
10         GridData data = new GridData();
11         Image srcImage = Image.FromFile(data.SrcFileName);
12         int width = srcImage.Width;
13         int height = srcImage.Height;
14         //列数
15         int columnNum = (int)Math.Ceiling(width * 1.0f / data.GridWidth);
16         //行数
17         int rowNum = (int)Math.Ceiling(height * 1.0f / data.GridHeight);
18 
19         ImageCodecInfo codecInfo = ImageCutterTool.GetEncodeInfo(ImageCutterConfig.mimeType);
20         EncoderParameters encoderParams = new EncoderParameters(2);
21         encoderParams.Param[0] = new EncoderParameter(Encoder.ColorDepth, 1L);
22         encoderParams.Param[1] = new EncoderParameter(Encoder.Quality, 1L);
23 
24         ToolParam toolParam = new ToolParam(srcImage, data, codecInfo, encoderParams, columnNum, rowNum);
25         for (int i = 0; i < rowNum; ++i)
26         {
27             for (int j = 0; j < columnNum; ++j)
28             {
29                 toolParam.RefreshIndex(j, i);
30                 ImageCutterTool.SaveSlice(toolParam);
31             }
32         }
33 
34         MessageBox.Show("图片切割完毕");
35     }
36 }