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New built in monitor detection system

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seerge
2023-03-07 15:23:06 +01:00
parent 003a19d94b
commit cf201632d5
2 changed files with 104 additions and 19 deletions
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2
GHelper.csproj
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@@ -15,7 +15,7 @@
<AssemblyName>GHelper</AssemblyName> <AssemblyName>GHelper</AssemblyName>
<PlatformTarget>x64</PlatformTarget> <PlatformTarget>x64</PlatformTarget>
<ProduceReferenceAssembly>False</ProduceReferenceAssembly> <ProduceReferenceAssembly>False</ProduceReferenceAssembly>
<AssemblyVersion>0.16</AssemblyVersion> <AssemblyVersion>0.17</AssemblyVersion>
<AllowUnsafeBlocks>True</AllowUnsafeBlocks> <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
</PropertyGroup> </PropertyGroup>

121
NativeMethods.cs
View File

@@ -1,4 +1,5 @@
using System.Diagnostics; using System.Diagnostics;
using System.Management;
using System.Runtime.InteropServices; using System.Runtime.InteropServices;
public class NativeMethods public class NativeMethods
@@ -160,10 +161,42 @@ public class NativeMethods
string lpszDeviceName, ref DEVMODE lpDevMode, IntPtr hwnd, string lpszDeviceName, ref DEVMODE lpDevMode, IntPtr hwnd,
DisplaySettingsFlags dwflags, IntPtr lParam); DisplaySettingsFlags dwflags, IntPtr lParam);
// ENUM DISPLAYS
[DllImport("user32.dll")]
static extern bool EnumDisplayDevicesA(string lpDevice, uint iDevNum, ref DISPLAY_DEVICE lpDisplayDevice, uint dwFlags);
public const int ENUM_CURRENT_SETTINGS = -1; [Flags()]
public enum DisplayDeviceStateFlags : int
{
AttachedToDesktop = 0x1,
MultiDriver = 0x2,
PrimaryDevice = 0x4,
MirroringDriver = 0x8,
VGACompatible = 0x10,
Removable = 0x20,
ModesPruned = 0x8000000,
Remote = 0x4000000,
Disconnect = 0x2000000
}
public const string laptopScreenName = "\\\\.\\DISPLAY1"; [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct DISPLAY_DEVICE
{
[MarshalAs(UnmanagedType.U4)]
public int cb;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string DeviceName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceString;
[MarshalAs(UnmanagedType.U4)]
public DisplayDeviceStateFlags StateFlags;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceID;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceKey;
}
// ----
public static DEVMODE CreateDevmode() public static DEVMODE CreateDevmode()
{ {
@@ -174,34 +207,86 @@ public class NativeMethods
return dm; return dm;
} }
public static Screen FindLaptopScreen() public const int ENUM_CURRENT_SETTINGS = -1;
{ public const string laptopScreenName = "\\\\.\\DISPLAY1";
var screens = Screen.AllScreens;
Screen laptopScreen = null;
foreach (var screen in screens) public static string FindLaptopScreen()
{
//var screens = Screen.AllScreens;
string laptopScreen = null;
DISPLAY_DEVICE d = new DISPLAY_DEVICE();
d.cb = Marshal.SizeOf(d);
List<string> activeScreens = new List<string>();
var searcherActive = new ManagementObjectSearcher(@"\\.\root\wmi", "SELECT * FROM WmiMonitorBasicDisplayParams");
var resultsActive = searcherActive.Get();
foreach (var result in resultsActive)
{ {
if (screen.DeviceName == laptopScreenName) activeScreens.Add(result["InstanceName"].ToString());
{
laptopScreen = screen;
}
} }
if (laptopScreen is null) return null; var searcher = new ManagementObjectSearcher(@"\\.\root\wmi", "SELECT * FROM WmiMonitorConnectionParams");
else return laptopScreen; var results = searcher.Get();
int counter = 0;
int deviceNum = -1;
foreach (var result in results)
{
long technology;
long.TryParse(result["VideoOutputTechnology"].ToString(), out technology);
string instanceName = result["InstanceName"].ToString();
if (technology == 0x80000000 && activeScreens.Contains(instanceName))
{
deviceNum = counter;
Debug.WriteLine(result["InstanceName"]);
}
counter++;
}
counter = 0;
for (uint id = 0; EnumDisplayDevicesA(null, id, ref d, 0); id++)
{
//Debug.WriteLine(d.StateFlags);
if ((d.StateFlags & DisplayDeviceStateFlags.AttachedToDesktop) != 0)
{
if (counter == deviceNum)
{
laptopScreen = d.DeviceName;
Debug.WriteLine(d.DeviceID);
Debug.WriteLine(d.DeviceName);
}
counter++;
}
}
/*
if (laptopScreen is null)
{
foreach (var screen in screens)
Debug.WriteLine(screen.DeviceName);
}
*/
return laptopScreen;
} }
public static int GetRefreshRate() public static int GetRefreshRate()
{ {
DEVMODE dm = CreateDevmode(); DEVMODE dm = CreateDevmode();
Screen laptopScreen = FindLaptopScreen(); string laptopScreen = FindLaptopScreen();
int frequency = -1; int frequency = -1;
if (laptopScreen is null) if (laptopScreen is null)
return -1; return -1;
if (0 != NativeMethods.EnumDisplaySettingsEx(laptopScreen.DeviceName, NativeMethods.ENUM_CURRENT_SETTINGS, ref dm)) if (0 != NativeMethods.EnumDisplaySettingsEx(laptopScreen, NativeMethods.ENUM_CURRENT_SETTINGS, ref dm))
{ {
frequency = dm.dmDisplayFrequency; frequency = dm.dmDisplayFrequency;
} }
@@ -212,15 +297,15 @@ public class NativeMethods
public static int SetRefreshRate(int frequency = 120) public static int SetRefreshRate(int frequency = 120)
{ {
DEVMODE dm = CreateDevmode(); DEVMODE dm = CreateDevmode();
Screen laptopScreen = FindLaptopScreen(); string laptopScreen = FindLaptopScreen();
if (laptopScreen is null) if (laptopScreen is null)
return -1; return -1;
if (0 != NativeMethods.EnumDisplaySettingsEx(laptopScreen.DeviceName, NativeMethods.ENUM_CURRENT_SETTINGS, ref dm)) if (0 != NativeMethods.EnumDisplaySettingsEx(laptopScreen, NativeMethods.ENUM_CURRENT_SETTINGS, ref dm))
{ {
dm.dmDisplayFrequency = frequency; dm.dmDisplayFrequency = frequency;
int iRet = NativeMethods.ChangeDisplaySettingsEx(laptopScreen.DeviceName, ref dm, IntPtr.Zero, DisplaySettingsFlags.CDS_UPDATEREGISTRY, IntPtr.Zero); int iRet = NativeMethods.ChangeDisplaySettingsEx(laptopScreen, ref dm, IntPtr.Zero, DisplaySettingsFlags.CDS_UPDATEREGISTRY, IntPtr.Zero);
return iRet; return iRet;
} }