private static IEnumerable <PartialScreenInfo> GetSetupApiData()
{
var screenInfos = new List <PartialScreenInfo>();
var monitorGuid = NativeMethods.GUID_DEVINTERFACE_MONITOR;
var devInfoSetHandle = IntPtr.Zero;
try
{
devInfoSetHandle = NativeMethods.SetupDiGetClassDevs(
ref monitorGuid,
null,
IntPtr.Zero,
NativeMethods.DiGetClassFlags.DIGCF_PRESENT |
NativeMethods.DiGetClassFlags.DIGCF_DEVICEINTERFACE);
if (devInfoSetHandle == IntPtr.Zero)
{
throw new Win32Exception();
}
uint i = 0;
while (true)
{
var deviceInterfaceData = new NativeMethods.SP_DEVICE_INTERFACE_DATA();
deviceInterfaceData.cbSize = Marshal.SizeOf(deviceInterfaceData);
if (!NativeMethods.SetupDiEnumDeviceInterfaces(
devInfoSetHandle, IntPtr.Zero, ref monitorGuid, i, ref deviceInterfaceData))
{
if (Marshal.GetLastWin32Error() == NativeMethods.ERROR_NO_MORE_ITEMS)
{
break;
}
throw new Win32Exception();
}
var deviceInterfaceDetail = GetDeviceInterfaceDetail(devInfoSetHandle, ref deviceInterfaceData);
var screenInfo = new PartialScreenInfo(
deviceInterfaceDetail.DevicePath,
GetDeviceInstanceId(deviceInterfaceDetail.DevinfoData.DevInst),
GetMonitorEDID(devInfoSetHandle, deviceInterfaceDetail.DevinfoData));
screenInfos.Add(screenInfo);
i++;
}
}
finally
{
if (devInfoSetHandle != IntPtr.Zero)
{
NativeMethods.SetupDiDestroyDeviceInfoList(devInfoSetHandle);
}
}
return(screenInfos);
}
private static DeviceInterfaceDetail GetDeviceInterfaceDetail(IntPtr devInfoSetHandle, ref NativeMethods.SP_DEVICE_INTERFACE_DATA deviceInterfaceData)
{
var devinfoData = new NativeMethods.SP_DEVINFO_DATA();
devinfoData.cbSize = Marshal.SizeOf(devinfoData);
uint requiredSize;
if (!NativeMethods.SetupDiGetDeviceInterfaceDetail(
devInfoSetHandle,
ref deviceInterfaceData,
IntPtr.Zero,
0,
out requiredSize,
ref devinfoData))
{
if (Marshal.GetLastWin32Error() != NativeMethods.ERROR_INSUFFICIENT_BUFFER)
{
throw new Win32Exception();
}
}
var deviceInterfaceDetailDataBuffer = Marshal.AllocHGlobal(
Marshal.SizeOf(typeof(uint)) +
Marshal.SystemDefaultCharSize +
(int)requiredSize + Marshal.SystemDefaultCharSize);
string devicePath;
try
{
// Potential danger: Writing int to uint
Marshal.WriteInt32(
deviceInterfaceDetailDataBuffer,
NativeMethods.SP_DEVICE_INTERFACE_DETAIL_DATA_SIZE);
if (!NativeMethods.SetupDiGetDeviceInterfaceDetail(
devInfoSetHandle,
ref deviceInterfaceData,
deviceInterfaceDetailDataBuffer,
requiredSize,
out requiredSize,
ref devinfoData))
{
throw new Win32Exception();
}
devicePath = Marshal.PtrToStringAuto(
new IntPtr(deviceInterfaceDetailDataBuffer.ToInt32() + 4),
((int)requiredSize - 6) / 2);
}
finally
{
Marshal.FreeHGlobal(deviceInterfaceDetailDataBuffer);
}
return(new DeviceInterfaceDetail(devinfoData, devicePath));
}
private static IEnumerable<PartialScreenInfo> GetSetupApiData()
{
var screenInfos = new List<PartialScreenInfo>();
var monitorGuid = NativeMethods.GUID_DEVINTERFACE_MONITOR;
var devInfoSetHandle = IntPtr.Zero;
try
{
devInfoSetHandle = NativeMethods.SetupDiGetClassDevs(
ref monitorGuid,
null,
IntPtr.Zero,
NativeMethods.DiGetClassFlags.DIGCF_PRESENT |
NativeMethods.DiGetClassFlags.DIGCF_DEVICEINTERFACE);
if (devInfoSetHandle == IntPtr.Zero)
{
throw new Win32Exception();
}
uint i = 0;
while (true)
{
var deviceInterfaceData = new NativeMethods.SP_DEVICE_INTERFACE_DATA();
deviceInterfaceData.cbSize = Marshal.SizeOf(deviceInterfaceData);
if (!NativeMethods.SetupDiEnumDeviceInterfaces(
devInfoSetHandle, IntPtr.Zero, ref monitorGuid, i, ref deviceInterfaceData))
{
if (Marshal.GetLastWin32Error() == NativeMethods.ERROR_NO_MORE_ITEMS)
{
break;
}
throw new Win32Exception();
}
var deviceInterfaceDetail = GetDeviceInterfaceDetail(devInfoSetHandle, ref deviceInterfaceData);
var screenInfo = new PartialScreenInfo(
deviceInterfaceDetail.DevicePath,
GetDeviceInstanceId(deviceInterfaceDetail.DevinfoData.DevInst),
GetMonitorEDID(devInfoSetHandle, deviceInterfaceDetail.DevinfoData));
screenInfos.Add(screenInfo);
i++;
}
}
finally
{
if (devInfoSetHandle != IntPtr.Zero)
{
NativeMethods.SetupDiDestroyDeviceInfoList(devInfoSetHandle);
}
}
return screenInfos;
}