private static bool TryGetDisplay(string deviceInstanceId, out string displayName, out DEVMODE dm)
{
foreach (var(display, _, monitor, _) in EnumerateDevices())
{
if (!string.Equals(DeviceConversion.ConvertToDeviceInstanceId(monitor.DeviceID), deviceInstanceId, StringComparison.OrdinalIgnoreCase))
{
continue;
}
displayName = display.DeviceName;
dm = new DEVMODE {
dmSize = (ushort)Marshal.SizeOf <DEVMODE>()
};
// EnumDisplaySettings function only works with display device.
return(EnumDisplaySettings(
displayName,
ENUM_CURRENT_SETTINGS,
ref dm));
}
displayName = null;
dm = default;
return(false);
}
public static IEnumerable <DisplayItem> EnumerateDisplayConfigs()
{
if (GetDisplayConfigBufferSizes(
QDC_ONLY_ACTIVE_PATHS,
out uint pathCount,
out uint modeCount) != ERROR_SUCCESS)
{
yield break;
}
var displayPaths = new DISPLAYCONFIG_PATH_INFO[pathCount];
var displayModes = new DISPLAYCONFIG_MODE_INFO[modeCount];
if (QueryDisplayConfig(
QDC_ONLY_ACTIVE_PATHS,
ref pathCount,
displayPaths,
ref modeCount,
displayModes,
IntPtr.Zero) != ERROR_SUCCESS)
{
yield break;
}
foreach (var displayPath in displayPaths)
{
var displayMode = displayModes
.Where(x => x.infoType == DISPLAYCONFIG_MODE_INFO_TYPE.DISPLAYCONFIG_MODE_INFO_TYPE_TARGET)
.FirstOrDefault(x => x.id == displayPath.targetInfo.id);
if (displayMode.Equals(default(DISPLAYCONFIG_MODE_INFO)))
{
continue;
}
var deviceName = new DISPLAYCONFIG_TARGET_DEVICE_NAME();
deviceName.header.size = (uint)Marshal.SizeOf <DISPLAYCONFIG_TARGET_DEVICE_NAME>();
deviceName.header.adapterId = displayMode.adapterId;
deviceName.header.id = displayMode.id;
deviceName.header.type = DISPLAYCONFIG_DEVICE_INFO_TYPE.DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME;
if (DisplayConfigGetDeviceInfo(ref deviceName) != ERROR_SUCCESS)
{
continue;
}
var deviceInstanceId = DeviceConversion.ConvertToDeviceInstanceId(deviceName.monitorDevicePath);
yield return(new DisplayItem(
deviceInstanceId: deviceInstanceId,
displayName: deviceName.monitorFriendlyDeviceName,
isInternal: (deviceName.outputTechnology == DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY.DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INTERNAL),
connectionDescription: GetConnectionDescription(deviceName.outputTechnology),
isAvailable: displayPath.targetInfo.targetAvailable));
}
}
public static IEnumerable <DeviceItem> EnumerateMonitorDevices()
{
foreach (var(_, displayIndex, monitor, monitorIndex) in EnumerateDevices())
{
var deviceInstanceId = DeviceConversion.ConvertToDeviceInstanceId(monitor.DeviceID);
//Debug.WriteLine($"DeviceId: {monitor.DeviceID}");
//Debug.WriteLine($"DeviceInstanceId: {deviceInstanceId}");
//Debug.WriteLine($"DeviceString: {monitor.DeviceString}");
yield return(new DeviceItem(
deviceInstanceId: deviceInstanceId,
description: monitor.DeviceString,
displayIndex: displayIndex,
monitorIndex: monitorIndex));
}
}