private static int GetMonitorHdrWhiteLevel(LUID adapterId, uint targetId)
{
try
{
DISPLAYCONFIG_SDR_WHITE_LEVEL deviceInfo = new DISPLAYCONFIG_SDR_WHITE_LEVEL();
deviceInfo.header.size = (uint)Marshal.SizeOf(typeof(DISPLAYCONFIG_SDR_WHITE_LEVEL));
deviceInfo.header.adapterId = adapterId;
deviceInfo.header.id = targetId;
deviceInfo.header.type = DISPLAYCONFIG_DEVICE_INFO_TYPE.DISPLAYCONFIG_DEVICE_INFO_GET_SDR_WHITE_LEVEL;
int error = DisplayConfigGetDeviceInfo(ref deviceInfo);
if (error != 0)
{
Debug.WriteLine("Failed GetMonitorHdrWhiteLevel: " + error);
return(0);
}
return(deviceInfo.SDRWhiteLevel);
}
catch
{
Debug.WriteLine("Failed GetMonitorHdrWhiteLevel.");
return(0);
}
}
public static ShaderHdrMetadata GetHdrMetadataForMonitor(string deviceName)
{
var err = BetterWin32Errors.Win32Error.ERROR_SUCCESS;
// TODO: also query monitor HDR white point brightness (currently hardcoded to 800.0f)
var hdrMetadata = new ShaderHdrMetadata {
EnableHdrProcessing = false, MonSdrDispNits = 80.0f, ExposureLevel = 1.0f, MonHdrDispNits = 800.0f
};
var monAdvColorInfo = DISPLAYCONFIG_GET_ADVANCED_COLOR_INFO.CreateGet();
var monSdrWhiteLevel = DISPLAYCONFIG_SDR_WHITE_LEVEL.CreateGet();
uint numPathArrayElements = 0;
uint numModeInfoArrayElements = 0;
err = GdiInterop.GetDisplayConfigBufferSizes(QDC_CONSTANT.QDC_ONLY_ACTIVE_PATHS,
ref numPathArrayElements, ref numModeInfoArrayElements);
if (err != BetterWin32Errors.Win32Error.ERROR_SUCCESS)
{
throw new System.ComponentModel.Win32Exception((int)err);
}
var displayPathInfoArray = new DISPLAYCONFIG_PATH_INFO[numPathArrayElements];
var displayModeInfoArray = new DISPLAYCONFIG_MODE_INFO[numModeInfoArrayElements];
err = GdiInterop.QueryDisplayConfig(QDC_CONSTANT.QDC_ONLY_ACTIVE_PATHS,
ref numPathArrayElements, displayPathInfoArray,
ref numModeInfoArrayElements, displayModeInfoArray, IntPtr.Zero);
if (err != BetterWin32Errors.Win32Error.ERROR_SUCCESS)
{
throw new System.ComponentModel.Win32Exception((int)err);
}
for (uint pathIdx = 0; pathIdx < numPathArrayElements; pathIdx++)
{
DISPLAYCONFIG_SOURCE_DEVICE_NAME srcName = DISPLAYCONFIG_SOURCE_DEVICE_NAME.CreateGet();
srcName.header.adapterId.HighPart = displayPathInfoArray[pathIdx].sourceInfo.adapterId.HighPart;
srcName.header.adapterId.LowPart = displayPathInfoArray[pathIdx].sourceInfo.adapterId.LowPart;
srcName.header.id = displayPathInfoArray[pathIdx].sourceInfo.id;
err = GdiInterop.DisplayConfigGetDeviceInfo(ref srcName);
if (err != BetterWin32Errors.Win32Error.ERROR_SUCCESS)
{
throw new System.ComponentModel.Win32Exception((int)err);
}
if (srcName.DeviceName == deviceName)
{
// If matches, proceed to query color information
monAdvColorInfo.header.adapterId.HighPart = displayPathInfoArray[pathIdx].targetInfo.adapterId.HighPart;
monAdvColorInfo.header.adapterId.LowPart = displayPathInfoArray[pathIdx].targetInfo.adapterId.LowPart;
monAdvColorInfo.header.id = displayPathInfoArray[pathIdx].targetInfo.id;
monSdrWhiteLevel.header.adapterId.HighPart = displayPathInfoArray[pathIdx].targetInfo.adapterId.HighPart;
monSdrWhiteLevel.header.adapterId.LowPart = displayPathInfoArray[pathIdx].targetInfo.adapterId.LowPart;
monSdrWhiteLevel.header.id = displayPathInfoArray[pathIdx].targetInfo.id;
err = GdiInterop.DisplayConfigGetDeviceInfo(ref monAdvColorInfo);
if (err != BetterWin32Errors.Win32Error.ERROR_SUCCESS)
{
throw new System.ComponentModel.Win32Exception((int)err);
}
hdrMetadata.EnableHdrProcessing = (monAdvColorInfo.AdvancedColorStatus & AdvancedColorStatus.AdvancedColorEnabled) == AdvancedColorStatus.AdvancedColorEnabled;
if (hdrMetadata.EnableHdrProcessing)
{
err = GdiInterop.DisplayConfigGetDeviceInfo(ref monSdrWhiteLevel);
if (err != BetterWin32Errors.Win32Error.ERROR_SUCCESS)
{
throw new System.ComponentModel.Win32Exception((int)err);
}
hdrMetadata.MonSdrDispNits = monSdrWhiteLevel.SDRWhiteLevelInNits;
}
break;
}
}
return(hdrMetadata);
}
private static extern int DisplayConfigGetDeviceInfo(ref DISPLAYCONFIG_SDR_WHITE_LEVEL requestPacket);