public static BitmapSource CaptureScreen(ReadOnlyRect rect)
{
var hdcSrc = GetAllMonitorsDC();
var width = rect.Width;
var height = rect.Height;
var hdcDest = CreateCompatibleDC(hdcSrc);
var hBitmap = CreateCompatibleBitmap(hdcSrc, width, height);
_ = SelectObject(hdcDest, hBitmap);
BitBlt(hdcDest, 0, 0, width, height, hdcSrc, rect.X, rect.Y,
TernaryRasterOperations.SRCCOPY | TernaryRasterOperations.CAPTUREBLT);
var image = Image.FromHbitmap(hBitmap);
var bitmap = image.ToBitmapSource();
//bitmap = Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty,
// BitmapSizeOptions.FromEmptyOptions());
DeleteObject(hBitmap);
DeleteDC(hdcDest);
DeleteDC(hdcSrc);
return(bitmap);
}
private static IReadOnlyList <CachedRect> CriticalGetChildren(
AutomationElement parentElement,
ReadOnlyRect physicalParentRect)
{
return(parentElement.FindAll(TreeScope.Children, ChildrenCondition)
.OfType <AutomationElement>()
.Select(item => (element: item, rect: GetRect(item, physicalParentRect)))
.Where(item => item.rect != ReadOnlyRect.Empty)
.Select(item => new CachedRect(item.element, item.rect))
.ToList());
}
private static void SetWindowRect(Window window, ReadOnlyRect rect)
{
SetWindowPos(
window.GetHandle(),
(IntPtr)HWND_TOPMOST,
rect.X,
rect.Y,
rect.Width,
rect.Height,
SWP_NOZORDER);
}
private static ReadOnlyRect GetRect(AutomationElement element, ReadOnlyRect physicalParentRect)
{
try
{
ReadOnlyRect rect = element.Current.BoundingRectangle;
return(rect == ReadOnlyRect.Empty ? ReadOnlyRect.Empty : rect.Intersect(physicalParentRect));
}
catch
{
return(ReadOnlyRect.Empty);
}
}
public MonitorInfo(IntPtr handle, bool isPrimaryScreen, ReadOnlyRect workArea, ReadOnlyRect screenRect)
{
Handle = handle;
IsPrimaryScreen = isPrimaryScreen;
PhysicalWorkArea = workArea;
PhysicalScreenRect = screenRect;
(ScaleX, ScaleY) = MonitorHelper.GetScaleFactorFromMonitor(handle);
var(x, y, width, height) = ToWpfAxis(
screenRect.X,
screenRect.Y,
screenRect.Width,
screenRect.Height);
WpfAxisScreenRect = new Rect(x, y, width, height);
}
private static IReadOnlyList <CachedRect> GetChildren(AutomationElement parentElement,
ReadOnlyRect physicalParentRect)
{
try
{
return(CriticalGetChildren(parentElement, physicalParentRect));
}
catch
{
// Ignore Exception
// * System.Runtime.InteropServices.COMException:
// 'An outgoing call cannot be made since the application is dispatching an input-synchronous call.
// (Exception from HRESULT: 0x8001010D (RPC_E_CANT CALL OUT_IN INPUT SYNC CALL))'
// * System.ArgumentException:
// 'Value does not fall within the expected range.'
// * System.Windows.Automation.ElementNotAvailableException:
// 'The target element corresponds to UI that is no longer available (for example, the parent window has closed).'
// * System.Runtime.InteropServices.COMException:
// 'Error HRESULT E_FAIL has been returned from a call to a COM component.'
return(EmptyChildren);
}
}
public void Snapshot(ReadOnlyRect physicalFullScreenRect)
{
_elementSnapshot = GetChildren(AutomationElement.RootElement, physicalFullScreenRect);
}
public CachedRect(AutomationElement element, ReadOnlyRect physicalRect)
{
Element = element;
PhysicalRect = physicalRect;
}
