protected override void OnRender(DrawingContext drawingContext)
{
ScreenReplicator replicator = Visual as ScreenReplicator;
if (replicator != null)
{
if (replicator.IsRunning)
{
if (replicator.IsReplicating)
{
_screenBrush = CreateImageBrush(replicator);
}
else if (replicator.BlankOnStop)
{
_screenBrush = null;
}
if (_screenBrush != null)
{
drawingContext.DrawRectangle(_screenBrush, null, _displayRect);
}
}
else
{
drawingContext.DrawRectangle(null, _inactivePen, _displayRect);
_inactiveTextFormat.RenderText(drawingContext, _inactiveBrush, "Screen Replicator", _displayRect);
}
}
}
protected override void OnRefresh()
{
ScreenReplicator replicator = Visual as ScreenReplicator;
_inactiveBrush = Brushes.Yellow;
_inactivePen = new Pen(_inactiveBrush, 1d);
_inactivePen.DashStyle = DashStyles.Dash;
_inactiveTextFormat = new TextFormat();
_inactiveTextFormat.VerticalAlignment = TextVerticalAlignment.Center;
_inactiveTextFormat.VerticalAlignment = TextVerticalAlignment.Center;
if (replicator != null)
{
_displayRect.Width = replicator.Width;
_displayRect.Height = replicator.Height;
}
}
private ImageBrush CreateImageBrush(ScreenReplicator replicator)
{
ImageBrush brush = null;
_hDC = NativeMethods.GetDC(NativeMethods.GetDesktopWindow());
_hMemDC = NativeMethods.CreateCompatibleDC(_hDC);
_hBitmap = NativeMethods.CreateCompatibleBitmap(_hDC, replicator.CaptureRectangle.Width, replicator.CaptureRectangle.Height);
if (_hBitmap != IntPtr.Zero)
{
IntPtr hOld = (IntPtr)NativeMethods.SelectObject(_hMemDC, _hBitmap);
NativeMethods.BitBlt(_hMemDC, 0, 0, replicator.CaptureRectangle.Width, replicator.CaptureRectangle.Height, _hDC,
replicator.CaptureRectangle.X, replicator.CaptureRectangle.Y, NativeMethods.SRCCOPY);
NativeMethods.SelectObject(_hMemDC, hOld);
BitmapSource bmp = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(_hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromWidthAndHeight(replicator.CaptureRectangle.Width, replicator.CaptureRectangle.Height));
brush = new ImageBrush(bmp);
NativeMethods.DeleteObject(_hBitmap);
}
NativeMethods.DeleteDC(_hMemDC);
NativeMethods.ReleaseDC(NativeMethods.GetDesktopWindow(), _hDC);
return brush;
}
private ImageBrush CreateImageBrush(ScreenReplicator replicator)
{
ImageBrush brush = null;
_hDC = NativeMethods.GetDC(NativeMethods.GetDesktopWindow());
_hMemDC = NativeMethods.CreateCompatibleDC(_hDC);
_hBitmap = NativeMethods.CreateCompatibleBitmap(_hDC, replicator.CaptureRectangle.Width, replicator.CaptureRectangle.Height);
if (_hBitmap != IntPtr.Zero)
{
IntPtr hOld = (IntPtr)NativeMethods.SelectObject(_hMemDC, _hBitmap);
NativeMethods.BitBlt(_hMemDC, 0, 0, replicator.CaptureRectangle.Width, replicator.CaptureRectangle.Height, _hDC,
replicator.CaptureRectangle.X, replicator.CaptureRectangle.Y, NativeMethods.SRCCOPY);
NativeMethods.SelectObject(_hMemDC, hOld);
BitmapSource bmp = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(_hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromWidthAndHeight(replicator.CaptureRectangle.Width, replicator.CaptureRectangle.Height));
brush = new ImageBrush(bmp);
NativeMethods.DeleteObject(_hBitmap);
}
NativeMethods.DeleteDC(_hMemDC);
NativeMethods.ReleaseDC(NativeMethods.GetDesktopWindow(), _hDC);
return(brush);
}
