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| using System; | |
| using System.Runtime.InteropServices; | |
| namespace OaktreeLab.Utils { | |
| internal class DisplayHelper { | |
| public static uint GetRefreshRate( IntPtr hWnd ) { | |
| IntPtr hmonitor = MonitorFromWindow( hWnd, MONITOR_DEFAULTTONEAREST ); | |
| MONITORINFOEXW monitorInfo = new MONITORINFOEXW(); | |
| monitorInfo.cbSize = (uint)Marshal.SizeOf<MONITORINFOEXW>(); | |
| GetMonitorInfoW( hmonitor, ref monitorInfo ); | |
| DEVMODEW devMode = new DEVMODEW(); | |
| devMode.dmSize = (ushort)Marshal.SizeOf<DEVMODEW>(); | |
| EnumDisplaySettingsW( monitorInfo.szDevice, ENUM_CURRENT_SETTINGS, out devMode ); | |
| return devMode.dmDisplayFrequency; | |
| } | |
| private const uint MONITOR_DEFAULTTONEAREST = 2; | |
| [DllImport( "user32.dll", SetLastError = false )] | |
| private static extern IntPtr MonitorFromWindow( IntPtr hWnd, uint dwFlags ); | |
| [StructLayout( LayoutKind.Sequential )] | |
| private struct RECT { | |
| public int left; | |
| public int top; | |
| public int right; | |
| public int bottom; | |
| } | |
| [StructLayout( LayoutKind.Sequential, CharSet = CharSet.Unicode )] | |
| private unsafe struct MONITORINFOEXW { | |
| public uint cbSize; | |
| public RECT rcMonitor; | |
| public RECT rcWork; | |
| public uint dwFlags; | |
| [MarshalAs( UnmanagedType.ByValTStr, SizeConst = 32 )] | |
| public string szDevice; | |
| } | |
| [DllImport( "user32.dll", SetLastError = false, CharSet = CharSet.Unicode )] | |
| [return: MarshalAs( UnmanagedType.Bool )] | |
| private static extern bool GetMonitorInfoW( IntPtr hMonitor, ref MONITORINFOEXW lpmi ); | |
| private const uint ENUM_CURRENT_SETTINGS = unchecked((uint)-1); | |
| [DllImport( "user32.dll", SetLastError = false, CharSet = CharSet.Unicode )] | |
| [return: MarshalAs( UnmanagedType.Bool )] | |
| private static extern bool EnumDisplaySettingsW( [MarshalAs( UnmanagedType.LPWStr )] string lpszDeviceName, uint iModeNum, out DEVMODEW lpDevMode ); | |
| [StructLayout( LayoutKind.Sequential, CharSet = CharSet.Unicode )] | |
| private struct DEVMODEW { | |
| [MarshalAs( UnmanagedType.ByValTStr, SizeConst = 32 )] | |
| public string dmDeviceName; | |
| public ushort dmSpecVersion; | |
| public ushort dmDriverVersion; | |
| public ushort dmSize; | |
| public ushort dmDriverExtra; | |
| public uint dmFields; | |
| public int dmPositionX; | |
| public int dmPositionY; | |
| public uint dmDisplayOrientation; | |
| public uint dmDisplayFixedOutput; | |
| public short dmColor; | |
| public short dmDuplex; | |
| public short dmYResolution; | |
| public short dmTTOption; | |
| public short dmCollate; | |
| [MarshalAs( UnmanagedType.ByValTStr, SizeConst = 32 )] | |
| public string dmFormName; | |
| public short dmLogPixels; | |
| public uint dmBitsPerPel; | |
| public uint dmPelsWidth; | |
| public uint dmPelsHeight; | |
| public uint dmNupOrDisplayFlags; | |
| public uint dmDisplayFrequency; | |
| public uint dmICMMethod; | |
| public uint dmICMIntent; | |
| public uint dmMediaType; | |
| public uint dmDitherType; | |
| public uint dmReserved1; | |
| public uint dmReserved2; | |
| public uint dmPanningWidth; | |
| public uint dmPanningHeight; | |
| } | |
| } | |
| } |
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