C# 影象處理(二)（螢幕擷取、截圖外掛）
阿新 • • 發佈：2019-01-06
雙擊執行截圖外掛，工具預設延時5秒後截圖
可擷取全屏
可擷取全屏
可擷取到快捷選單和滑鼠
也可通過cmd命令執行工具，呼叫示例引數如下：
工具原始碼：REM 呼叫截圖工具進行截圖 call "%~dp0getScreen.exe" REM 儲存到指定目錄（D:\tmp\截圖.png） call "%~dp0getScreen.exe" "D:\tmp\截圖1.png" REM 延時1秒執行（1000ms） call "%~dp0getScreen.exe" "D:\tmp\截圖2.png" 1000 REM 截圖指定區域 （0 0 100 100） call "%~dp0getScreen.exe" "D:\tmp\截圖3.png" 1000 0 0 100 100 REM 截圖時不要滑鼠 call "%~dp0getScreen.exe" "D:\tmp\截圖4.png" 1000 0 0 100 100 false
using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using System.Windows.Forms; namespace getScreen { static class Program { /// <summary> /// 應用程式的主入口點。 /// 通過引數呼叫截圖外掛，call "%~dp0getScreen.exe" "D:\tmp\截圖4.png" 1000 0 0 -1 -1 true /// </summary> [STAThread] static void Main(String[] args) { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); //Application.Run(new Form1()); // 設定截圖控制資訊 ScreenParam param = new ScreenParam(); param.programExit = true; // 截圖執行完成後退出程式 param.delay_ms = 5000; // 預設延時5秒截圖 if (args.Length > 0) { if (args.Length > 0) param.savePath = args[0]; // 儲存路徑 if (args.Length > 1) param.delay_ms = Int32.Parse(args[1]); // 延時（ms） if (args.Length > 5) { param.x = Int32.Parse(args[2]); // 擷取區域 param.y = Int32.Parse(args[3]); param.width = Int32.Parse(args[4]); param.height = Int32.Parse(args[5]); } if (args.Length > 6) param.haveCursor = !args[5].Equals("false"); // 是否包含滑鼠 //MessageBox.Show(param.savePath + ", " + param.delay_ms + ", " + param.x + ", " + param.y + ", " + param.width + ", " + param.height + ", " + param.haveCursor); } ScreenShot.getScreen(param); // 截圖 Application.Run(); // 在當前執行緒上執行應用程式訊息迴圈 } /// <summary> /// 呼叫系統退出 /// </summary> public static void exit() { //Application.Exit(); //Application.ExitThread(); System.Environment.Exit(0); } } }
using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Linq; using System.Runtime.InteropServices; using System.Text; using System.Windows.Forms; namespace getScreen { /// <summary> /// 截圖控制引數 /// </summary> class ScreenParam { public int x = 0, y = 0, width = -1, height = -1; // 擷取區域，當前設定值會替換為全屏 public String savePath = ""; // 截圖影象儲存完整路徑 public bool haveCursor = true; // 是否包含滑鼠 public int delay_ms = 0; // 延時ms public bool programExit = false; // 標識截圖完成後是否退出 /// <summary> /// 截圖控制引數 /// </summary> public ScreenParam(int x = 0, int y = 0, int width = -1, int height = -1, String savePath = "", bool haveCursor = true, int delay_ms = 0) { this.x = x; this.y = y; this.width =width; this.height = height; this.savePath = savePath; this.haveCursor = haveCursor; this.delay_ms = delay_ms; } } class ScreenShot { # region 影象處理功能函式 /// <summary> /// 按指定尺寸對影象pic進行非拉伸縮放 /// </summary> public static Bitmap shrinkTo(Image pic, Size S, Boolean cutting) { //建立影象 Bitmap tmp = new Bitmap(S.Width, S.Height); //按指定大小建立點陣圖 //繪製 Graphics g = Graphics.FromImage(tmp); //從點陣圖建立Graphics物件 g.Clear(Color.FromArgb(0, 0, 0, 0)); //清空 Boolean mode = (float)pic.Width / S.Width > (float)pic.Height / S.Height; //zoom縮放 if (cutting) mode = !mode; //裁切縮放 //計算Zoom繪製區域 if (mode) S.Height = (int)((float)pic.Height * S.Width / pic.Width); else S.Width = (int)((float)pic.Width * S.Height / pic.Height); Point P = new Point((tmp.Width - S.Width) / 2, (tmp.Height - S.Height) / 2); g.DrawImage(pic, new Rectangle(P, S)); return tmp; //返回構建的新影象 } //儲存影象pic到檔案fileName中，指定影象儲存格式 public static void SaveToFile(Image pic, string fileName, bool replace, ImageFormat format) //ImageFormat.Jpeg { // 建立儲存目錄 confirmDir(fileName); //若影象已存在，則刪除 if (System.IO.File.Exists(fileName) && replace) System.IO.File.Delete(fileName); //若不存在則建立 if (!System.IO.File.Exists(fileName)) { if (format == null) format = getFormat(fileName); //根據拓展名獲取影象的對應儲存型別 if (format == ImageFormat.MemoryBmp) pic.Save(fileName); else pic.Save(fileName, format); //按給定格式儲存影象 } } //根據檔案拓展名，獲取對應的儲存型別 public static ImageFormat getFormat(string filePath) { ImageFormat format = ImageFormat.MemoryBmp; String Ext = System.IO.Path.GetExtension(filePath).ToLower(); if (Ext.Equals(".png")) format = ImageFormat.Png; else if (Ext.Equals(".jpg") || Ext.Equals(".jpeg")) format = ImageFormat.Jpeg; else if (Ext.Equals(".bmp")) format = ImageFormat.Bmp; else if (Ext.Equals(".gif")) format = ImageFormat.Gif; else if (Ext.Equals(".ico")) format = ImageFormat.Icon; else if (Ext.Equals(".emf")) format = ImageFormat.Emf; else if (Ext.Equals(".exif")) format = ImageFormat.Exif; else if (Ext.Equals(".tiff")) format = ImageFormat.Tiff; else if (Ext.Equals(".wmf")) format = ImageFormat.Wmf; else if (Ext.Equals(".memorybmp")) format = ImageFormat.MemoryBmp; return format; } [DllImport("user32.dll")] static extern bool GetCursorInfo(out CURSORINFO pci); private const Int32 CURSOR_SHOWING = 0x00000001; [StructLayout(LayoutKind.Sequential)] struct POINT { public Int32 x; public Int32 y; } [StructLayout(LayoutKind.Sequential)] struct CURSORINFO { public Int32 cbSize; public Int32 flags; public IntPtr hCursor; public POINT ptScreenPos; } private static ScreenParam paramI = null; /// <summary> /// 延時截圖處理邏輯 /// </summary> private static void ScreenShot_Tick(object sender, EventArgs e) { ((Timer)sender).Stop(); // 停止計時 getScreen(paramI); // 執行截圖 paramI = null; } /// <summary> /// 根據param中的引數控制截圖 /// </summary> public static void getScreen(ScreenParam param) { if (param == null) return; if (param.delay_ms > 0) { Timer timer = new Timer(); timer.Interval = param.delay_ms; timer.Tick += ScreenShot_Tick; paramI = param; paramI.delay_ms = 0; timer.Enabled = true; } else getScreen(param.x, param.y, param.width, param.height, param.savePath, param.haveCursor, param.delay_ms, param.programExit); } /// <summary> /// 擷取螢幕指定區域為Image，儲存到路徑savePath下，haveCursor是否包含滑鼠 /// </summary> public static Image getScreen(int x = 0, int y = 0, int width = -1, int height = -1, String savePath = "", bool haveCursor = true, int delay_ms = 0, bool exit = false) { // 延時截圖時無返回值 if (delay_ms > 0) { getScreen(new ScreenParam(x, y, width, height, savePath, haveCursor, delay_ms)); return null; } if (width == -1) width = SystemInformation.VirtualScreen.Width; if (height == -1) height = SystemInformation.VirtualScreen.Height; Bitmap tmp = new Bitmap(width, height); //按指定大小建立點陣圖 Graphics g = Graphics.FromImage(tmp); //從點陣圖建立Graphics物件 g.CopyFromScreen(x, y, 0, 0, new Size(width, height)); //繪製 // 繪製滑鼠 if (haveCursor) { try { CURSORINFO pci; pci.cbSize = Marshal.SizeOf(typeof(CURSORINFO)); GetCursorInfo(out pci); System.Windows.Forms.Cursor cur = new System.Windows.Forms.Cursor(pci.hCursor); cur.Draw(g, new Rectangle(pci.ptScreenPos.x, pci.ptScreenPos.y, cur.Size.Width, cur.Size.Height)); } catch (Exception ex) { } // 若獲取滑鼠異常則不顯示 } if (savePath.Equals("")) savePath = JpgTmpPath(); // 設定預設儲存路徑 //Size halfSize = new Size((int)(tmp.Size.Width * 0.8), (int)(tmp.Size.Height * 0.8)); // 按一半尺寸儲存影象 if (!savePath.Equals("")) saveImage(tmp, tmp.Size, savePath); // 儲存到指定的路徑下 if (exit) System.Environment.Exit(0); // 退出當前應用程式 return tmp; //返回構建的新影象 } /// <summary> /// 縮放icon為指定的尺寸，並儲存到路徑PathName /// </summary> public static void saveImage(Image image, Size size, String PathName) { Image tmp = shrinkTo(image, size, false); SaveToFile(tmp, PathName, true, null); } // 生成jpg的臨時儲存路徑 public static String JpgTmpPath() { string dateTime = DateTime.Now.ToString("yyyy-MM-dd_hh.mm.ss"); string screenDir = System.AppDomain.CurrentDomain.BaseDirectory + @"screens"; // 截圖儲存路徑 String pathName = screenDir + @"\" + dateTime + ".png"; return pathName; } /// <summary> /// 檢測目錄是否存在，若不存在則建立 /// </summary> public static void confirmDir(string path) { String rootDir = System.IO.Path.GetDirectoryName(path); //獲取path所在的目錄 if (!Directory.Exists(rootDir)) Directory.CreateDirectory(rootDir); //若目錄不存在則建立 } # endregion } }
