/**
* Gets Display Information
*
* @return An array of Display objects representing monitors, etc.
*/
public static Display[] getDisplays() {
List<Display> displays = new ArrayList<>();
Guid.GUID monitorGuid = new Guid.GUID("E6F07B5F-EE97-4a90-B076-33F57BF4EAA7");
WinNT.HANDLE hDevInfo =
SetupApi.INSTANCE.SetupDiGetClassDevs(
monitorGuid, null, null, SetupApi.DIGCF_PRESENT | SetupApi.DIGCF_DEVICEINTERFACE);
if (!hDevInfo.equals(WinNT.INVALID_HANDLE_VALUE)) {
SP_DEVICE_INTERFACE_DATA deviceInterfaceData = new SetupApi.SP_DEVICE_INTERFACE_DATA();
deviceInterfaceData.cbSize = deviceInterfaceData.size();
// build a DevInfo Data structure
SP_DEVINFO_DATA info = new SetupApi.SP_DEVINFO_DATA();
for (int memberIndex = 0;
SetupApi.INSTANCE.SetupDiEnumDeviceInfo(hDevInfo, memberIndex, info);
memberIndex++) {
HKEY key =
SetupApi.INSTANCE.SetupDiOpenDevRegKey(
hDevInfo,
info,
SetupApi.DICS_FLAG_GLOBAL,
0,
SetupApi.DIREG_DEV,
WinNT.KEY_QUERY_VALUE);
byte[] edid = new byte[1];
Advapi32 advapi32 = Advapi32.INSTANCE;
IntByReference pType = new IntByReference();
IntByReference lpcbData = new IntByReference();
if (advapi32.RegQueryValueEx(key, "EDID", 0, pType, edid, lpcbData)
== WinError.ERROR_MORE_DATA) {
edid = new byte[lpcbData.getValue()];
if (advapi32.RegQueryValueEx(key, "EDID", 0, pType, edid, lpcbData)
== WinError.ERROR_SUCCESS) {
Display display = new WindowsDisplay(edid);
displays.add(display);
}
}
Advapi32.INSTANCE.RegCloseKey(key);
}
}
return displays.toArray(new Display[displays.size()]);
}
@Override
public void revertToSelf() {
Advapi32.INSTANCE.RevertToSelf();
}
/**
* Impersonate a logged on user.
*
* @param windowsIdentity Windows identity obtained via LogonUser.
*/
public WindowsIdentityImpersonationContextImpl(HANDLE windowsIdentity) {
if (!Advapi32.INSTANCE.ImpersonateLoggedOnUser(windowsIdentity)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
}