/// <summary>
/// This method updates the DPI information of a visual. It can only be called on a Visual with no parent.
/// </summary>
public static void SetRootDpi(Visual visual, DpiScale dpiInfo)
{
if ((object)dpiInfo == null)
{
throw new NullReferenceException("dpiInfo cannot be null");
}
if (visual.InternalVisualParent != null)
{
throw new InvalidOperationException("UpdateDPI should only be called on the root of a Visual tree");
}
DpiFlags dpiFlags = DpiUtil.UpdateDpiScalesAndGetIndex(dpiInfo.PixelsPerInchX, dpiInfo.PixelsPerInchY);
visual.RecursiveSetDpiScaleVisualFlags(new DpiRecursiveChangeArgs(dpiFlags, visual.GetDpi(), dpiInfo));
}
private static extern IntPtr GetDpiForMonitor(IntPtr hMonitor, DpiFlags dpiType, out uint dpiX, out uint dpiY);
