public static Bitmap GetWindowBitmap(IntPtr hwnd, Rect rect)
{
var hdc = Win32GDIWindow.BeginPaint(hwnd, out LPPAINTSTRUCT lps);
var hdcMem = Win32GDI.CreateCompatibleDC(hdc);
var hbitmap = Win32GDI.CreateCompatibleBitmap(hdc, rect.Width, rect.Height);
Win32GDIWindow.ReleaseDC(hwnd, hdc);
Win32GDI.SelectObject(hdcMem, hbitmap);
Win32GDIWindow.PrintWindow(hwnd, hdcMem, 0);
var bmp = Image.FromHbitmap(hbitmap);
Win32GDI.DeleteDC(hdcMem);
Win32GDIWindow.DeleteObject(hbitmap);
lps.rcPaint = new Rect {
Top = 0, Left = 0, Bottom = rect.Height, Right = rect.Width
};
Win32GDIWindow.EndPaint(hwnd, ref lps);
return(bmp);
}
public static Bitmap GetWindowBitmap(IntPtr hwnd)
{
var hdc = Win32GDIWindow.BeginPaint(hwnd, out LPPAINTSTRUCT lps);
var rec = new Rect();
Win32Hand.GetWindowRect(hwnd, out rec);
// IntPtr hdc = WindowExternal.GetDC(hwnd);
var hdcMem = Win32GDI.CreateCompatibleDC(hdc);
var hbitmap = Win32GDI.CreateCompatibleBitmap(hdc, rec.Width, rec.Height);
Win32GDIWindow.ReleaseDC(hwnd, hdc);
Win32GDI.SelectObject(hdcMem, hbitmap);
//可能造成窗体刷新失败
Win32GDIWindow.PrintWindow(hwnd, hdcMem, 0);
//开启dwm后可以BitBlt获得离屏表面
//GDIExternal.BitBlt(hdcMem, 0, 0, rec.Width, rec.Height,
// hdc, 0, 0, TernaryRasterOperations.SRCCOPY);
var bmp = Image.FromHbitmap(hbitmap);
Win32GDI.DeleteDC(hdcMem);
Win32GDIWindow.DeleteObject(hbitmap);
lps.rcPaint = new Rect {
Top = 0, Left = 0, Bottom = rec.Height, Right = rec.Width
};
Win32GDIWindow.EndPaint(hwnd, ref lps);
#region 预处理
//IntPtr hdcMem;
//IntPtr ip = InnerPaintWindowsCapture(hwnd,out hdcMem);
//Bitmap bmp = Image.FromHbitmap(ip);
//WindowExternal.DeleteObject(ip);
//GDIExternal.DeleteDC(hdcMem);
#endregion
//if (collect.Count<50)
//{
// collect.Add(bmp);
//}
return(bmp);
}
