internal IEnumerable <DisplayDevice> GetDisplayDevices(bool?filterByValidity)
{
var device = Native.DeviceContext.Structures.DisplayDevice.Initialize();
var returned = new Dictionary <string, string>();
for (uint i = 0; DeviceContextApi.EnumDisplayDevices(null, i, ref device, 0); i++)
{
if (DevicePath.Equals(device.DeviceId))
{
DisplayDevice displayDevice = null;
var display = Native.DeviceContext.Structures.DisplayDevice.Initialize();
for (uint id = 0; DeviceContextApi.EnumDisplayDevices(device.DeviceName, id, ref display, 1); id++)
{
var isAttached = display.StateFlags.HasFlag(DisplayDeviceStateFlags.AttachedToDesktop);
if (!filterByValidity.HasValue)
{
yield return(DisplayDevice.FromDeviceInformation(this, device, display));
}
else if (filterByValidity.Value && isAttached)
{
if (!returned.ContainsKey(display.DeviceId) ||
!returned[display.DeviceId].Equals(display.DeviceKey))
{
returned.Add(display.DeviceId, display.DeviceKey);
yield return(DisplayDevice.FromDeviceInformation(this, device, display));
break;
}
}
else if (!filterByValidity.Value)
{
if (!isAttached)
{
if (!returned.ContainsKey(display.DeviceId) ||
!returned[display.DeviceId].Equals(display.DeviceKey))
{
displayDevice = DisplayDevice.FromDeviceInformation(this, device, display);
}
}
else
{
displayDevice = null;
break;
}
}
display = Native.DeviceContext.Structures.DisplayDevice.Initialize();
}
if (displayDevice != null)
{
returned.Add(displayDevice.DevicePath, displayDevice.DeviceKey);
yield return(displayDevice);
}
}
device = Native.DeviceContext.Structures.DisplayDevice.Initialize();
}
}
internal IEnumerable <DisplayDevice> GetDisplayDevices(bool?filterByAvailability)
{
var returned = new Dictionary <string, string>();
var adapterIndex = -1;
while (true)
{
adapterIndex++;
var adapter = Native.DeviceContext.Structures.DisplayDevice.Initialize();
if (!DeviceContextApi.EnumDisplayDevices(null, (uint)adapterIndex, ref adapter, 0))
{
break;
}
if (!DevicePath.Equals(adapter.DeviceId))
{
continue;
}
var displayIndex = -1;
while (true)
{
displayIndex++;
var display = Native.DeviceContext.Structures.DisplayDevice.Initialize();
if (!DeviceContextApi.EnumDisplayDevices(adapter.DeviceName, (uint)displayIndex, ref display, 1))
{
break;
}
var displayDevice = DisplayDevice.FromDeviceInformation(this, adapter, display);
if (!filterByAvailability.HasValue)
{
yield return(displayDevice);
}
else if (displayDevice.IsAvailable == filterByAvailability.Value)
{
if (returned.ContainsKey(display.DeviceId) &&
returned[display.DeviceId].Equals(display.DeviceKey)
)
{
continue;
}
returned.Add(display.DeviceId, display.DeviceKey);
yield return(displayDevice);
}
}
}
}
