protected virtual unsafe CefRect GetCefRootBounds()
{
VirtualDevice device = Device;
if (device == null)
{
const int GA_ROOT = 2;
RECT windowBounds;
IntPtr hwnd = NativeMethods.GetAncestor(OffscreenGraphics.WidgetHandle, GA_ROOT);
if ((NativeMethods.DwmIsCompositionEnabled() && NativeMethods.DwmGetWindowAttribute(hwnd, DWMWINDOWATTRIBUTE.ExtendedFrameBounds, &windowBounds, sizeof(RECT)) == 0) ||
NativeMethods.GetWindowRect(hwnd, out windowBounds))
{
float ppd = OffscreenGraphics.PixelsPerDip;
if (ppd == 1.0f)
{
return(windowBounds.ToCefRect());
}
return(new CefRect(
(int)(windowBounds.Left / ppd),
(int)(windowBounds.Top / ppd),
(int)((windowBounds.Right - windowBounds.Left) / ppd),
(int)((windowBounds.Bottom - windowBounds.Top) / ppd)
));
}
return(OffscreenGraphics.GetBounds());
}
else
{
return(device.GetRootBounds());
}
}
/// <summary>
/// Enable or disable device simulation.
/// </summary>
/// <param name="device">The simulated device or null.</param>
public void SimulateDevice(VirtualDevice device)
{
if (IsHandleCreated)
{
VerifyAccess();
}
if (Device == device)
{
return;
}
OffscreenGraphics offscreenGraphics = this.OffscreenGraphics;
if (offscreenGraphics != null)
{
offscreenGraphics.Device = device;
}
if (IsHandleCreated)
{
if (!WindowlessRenderingEnabled)
{
throw new InvalidOperationException();
}
OnSizeChanged(EventArgs.Empty);
}
else
{
Device = device;
}
}
protected override void OnBackColorChanged(EventArgs e)
{
OffscreenGraphics offscreenGraphics = this.OffscreenGraphics;
if (offscreenGraphics != null)
{
offscreenGraphics.Background = this.BackColor;
}
base.OnBackColorChanged(e);
}
