67 lines
2.5 KiB
C#
67 lines
2.5 KiB
C#
using anjianjingling.Native;
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namespace anjianjingling.Vision
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{
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/// <summary>
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/// 屏幕/区域/窗口截图（GDI BitBlt）。
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/// </summary>
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public sealed class ScreenCapture
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{
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/// <summary>截取整个虚拟屏幕（所有显示器）。</summary>
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public Bitmap CaptureScreen()
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{
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int x = Win32.GetSystemMetrics(Win32.SM_XVIRTUALSCREEN);
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int y = Win32.GetSystemMetrics(Win32.SM_YVIRTUALSCREEN);
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int w = Win32.GetSystemMetrics(Win32.SM_CXVIRTUALSCREEN);
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int h = Win32.GetSystemMetrics(Win32.SM_CYVIRTUALSCREEN);
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return CaptureRegion(x, y, w, h);
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}
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/// <summary>截取指定屏幕区域。</summary>
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public Bitmap CaptureRegion(int x, int y, int width, int height)
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{
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if (width <= 0 || height <= 0)
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throw new ArgumentException($"截图区域非法：({x},{y},{width},{height})");
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var bmp = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
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using (var g = Graphics.FromImage(bmp))
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{
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g.CopyFromScreen(x, y, 0, 0, new Size(width, height), CopyPixelOperation.SourceCopy);
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}
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return bmp;
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}
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/// <summary>
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/// 截取指定窗口（含被遮挡部分，依赖 PrintWindow；部分程序不支持则返回 null）。
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/// </summary>
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public Bitmap? CaptureWindow(IntPtr hWnd)
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{
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if (!Win32.GetClientRect(hWnd, out var rc) || rc.Width <= 0 || rc.Height <= 0)
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return null;
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var bmp = new Bitmap(rc.Width, rc.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
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using (var g = Graphics.FromImage(bmp))
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{
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IntPtr hdc = g.GetHdc();
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bool ok = Win32.PrintWindow(hWnd, hdc, Win32.PW_RENDERFULLCONTENT);
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g.ReleaseHdc(hdc);
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if (!ok)
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{
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bmp.Dispose();
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return null;
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}
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}
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return bmp;
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}
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/// <summary>截图并保存到文件。</summary>
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public string SaveRegion(int x, int y, int width, int height, string path)
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{
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using var bmp = CaptureRegion(x, y, width, height);
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Directory.CreateDirectory(Path.GetDirectoryName(Path.GetFullPath(path))!);
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bmp.Save(path, System.Drawing.Imaging.ImageFormat.Png);
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return Path.GetFullPath(path);
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}
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}
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}
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