/// <summary>
/// Creates an Image object containing a screen shot of a specific window
/// </summary>
/// <param name="handle">The handle to the window. (In windows forms, this is obtained by the Handle property)</param>
/// <returns></returns>
public Image CaptureWindow(IntPtr handle)
{
// return CaptureScreen2();
Gd.InitGd();
// get the size
Win32Wrap.RECT windowRect = new Win32Wrap.RECT();
Win32Wrap.GetWindowRect(handle, ref windowRect);
int width = windowRect.right - windowRect.left;
int height = windowRect.bottom - windowRect.top;
// real rect
Win32Wrap.RECT windowRect2 = new Win32Wrap.RECT();
Win32Wrap.DwmGetWindowAttribute(handle, Win32Wrap.DWMWA_EXTENDED_FRAME_BOUNDS, ref windowRect2, 4 * 4);
int width2 = windowRect2.right - windowRect2.left;
int height2 = windowRect2.bottom - windowRect2.top;
windowRect = windowRect2;
width = width2;
height = height2;
// get te hDC of the target window
IntPtr hdcSrc = Win32Wrap.GetWindowDC(IntPtr.Zero);
// create a device context we can copy to
IntPtr hdcDest = Win32Wrap.CreateCompatibleDC(hdcSrc);
// create a bitmap we can copy it to,
// using GetDeviceCaps to get the width/height
IntPtr hBitmap = Win32Wrap.CreateCompatibleBitmap(hdcSrc, width, height);
// select the bitmap object
IntPtr hOld = Win32Wrap.SelectObject(hdcDest, hBitmap);
// bitblt over
Win32Wrap.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, windowRect.left, windowRect.top, Win32Wrap.SRCCOPY);
// restore selection
Win32Wrap.SelectObject(hdcDest, hOld);
// clean up
Win32Wrap.DeleteDC(hdcDest);
Win32Wrap.ReleaseDC(handle, hdcSrc);
// get a .NET image object for it
Image img = Image.FromHbitmap(hBitmap);
// free up the Bitmap object
Win32Wrap.DeleteObject(hBitmap);
return(img);
}
public static void InitGd()
{
if (_inited)
{
return;
}
_inited = true;
// 高解像度の縮小無効処理
// http://stackoverflow.com/questions/13228185/how-to-configure-an-app-to-run-correctly-on-a-machine-with-a-high-dpi-setting-e/13228495#13228495
if (Environment.OSVersion.Version.Major >= 6)
{
Win32Wrap.SetProcessDPIAware();
}
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
}
public static Bitmap CaptureScreen2()
{
//プライマリモニタのデバイスコンテキストを取得
IntPtr disDC = GetDC(IntPtr.Zero);
//Bitmapの作成
Bitmap bmp = new Bitmap(Screen.PrimaryScreen.Bounds.Width,
Screen.PrimaryScreen.Bounds.Height);
//Graphicsの作成
Graphics g = Graphics.FromImage(bmp);
//Graphicsのデバイスコンテキストを取得
IntPtr hDC = g.GetHdc();
//Bitmapに画像をコピーする
Win32Wrap.BitBlt(hDC, 0, 0, bmp.Width, bmp.Height,
disDC, 0, 0, Win32Wrap.SRCCOPY);
//解放
g.ReleaseHdc(hDC);
g.Dispose();
Win32Wrap.ReleaseDC(IntPtr.Zero, disDC);
return(bmp);
}
/// <summary>
/// Creates an Image object containing a screen shot of the entire desktop
/// </summary>
/// <returns></returns>
public Image CaptureScreen()
{
return(CaptureWindow(Win32Wrap.GetDesktopWindow()));
}
