添加图标提取器代码

tools/ico_extractor/IconExtractor.cs

@@ -0,0 +1,104 @@
+using System;
+using System.Drawing;
+using System.Runtime.InteropServices;
+using System.IO;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+
+namespace AppStore.Tools.IconExtractor
+{
+    public static class IconExtractor
+    {
+        /// <summary>
+        /// 获取ICO文件中的实际尺寸列表
+        /// </summary>
+        public static List<int> GetIconDimensions(string filePath)
+        {
+            var sizes = new List<int>();
+            try
+            {
+                using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
+                using (var reader = new BinaryReader(fs))
+                {
+                    // 读取ICO文件头
+                    reader.ReadUInt16(); // 保留字段
+                    ushort type = reader.ReadUInt16(); // 1=ICO, 2=CUR
+                    ushort count = reader.ReadUInt16(); // 图像数量
+                    
+                    if (type != 1) return sizes; // 不是ICO文件
+
+                    // 读取每个图像目录项
+                    for (int i = 0; i < count; i++)
+                    {
+                        byte width = reader.ReadByte();
+                        byte height = reader.ReadByte();
+                        reader.ReadBytes(14); // 跳过其他字段
+
+                        // 宽度/高度为0表示256像素
+                        int size = width == 0 ? 256 : width;
+                        sizes.Add(size);
+                    }
+                }
+            }
+            catch
+            {
+                // 忽略所有错误，返回空列表
+            }
+            return sizes;
+        }
+        [DllImport("shell32.dll", CharSet = CharSet.Auto)]
+        private static extern int ExtractIconEx(
+            string lpszFile, 
+            int nIconIndex, 
+            [AllowNull] IntPtr[] phiconLarge, 
+            [AllowNull] IntPtr[] phiconSmall, 
+            int nIcons);
+
+        [DllImport("user32.dll", CharSet = CharSet.Auto)]
+        private static extern bool DestroyIcon(IntPtr handle);
+
+        /// <summary>
+        /// 从文件中提取图标
+        /// </summary>
+        /// <param name="filePath">文件路径</param>
+        /// <param name="iconIndex">图标索引</param>
+        /// <param name="largeIcon">是否提取大图标</param>
+        /// <returns>提取的图标</returns>
+        public static Icon ExtractIconFromFile(string filePath, int iconIndex = 0)
+        {
+            IntPtr[] hIcons = new IntPtr[1];
+            int extractedCount = ExtractIconEx(filePath, iconIndex, hIcons, null, 1);
+
+            if (extractedCount <= 0 || hIcons[0] == IntPtr.Zero)
+                throw new FileNotFoundException("无法从文件中提取图标");
+
+            // 直接返回原始图标
+            Icon icon = (Icon)Icon.FromHandle(hIcons[0]).Clone();
+            DestroyIcon(hIcons[0]);
+            return icon;
+        }
+
+        /// <summary>
+        /// 将图标保存为文件
+        /// </summary>
+        /// <param name="icon">图标对象</param>
+        /// <param name="outputPath">输出路径</param>
+        public static void SaveIconToFile(Icon icon, string outputPath)
+        {
+            using (FileStream fs = new FileStream(outputPath, FileMode.Create))
+            {
+                icon.Save(fs);
+            }
+        }
+
+        /// <summary>
+        /// 获取文件中的图标数量
+        /// </summary>
+        /// <param name="filePath">文件路径</param>
+        /// <returns>图标数量</returns>
+        public static int GetIconCount(string filePath)
+        {
+            return ExtractIconEx(filePath, -1, null, null, 0);
+        }
+    }
+}