lib/Win32Interop/DisplayConfig.cs
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using System;
using System.Collections.Generic; using System.Runtime.InteropServices; // Source: adapted from https://stackoverflow.com/questions/16082330/communicating-with-windows7-display-api // TODO add explicit value type marshaling for everything in this class to be thorough public class DisplayConfig { // See WinUser.h from Windows SDK for windows internal method definition // See wingdi.h from Windows SDK for windows internal nested enum definitions // See generic win32 error codes for windows internal return val definiion [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int GetDisplayConfigBufferSizes( QueryDisplayConfigFlags flags, ref uint numPathArrayElements, ref uint numModeInfoArrayElements ); // See WinUser.h from Windows SDK for windows internal method definition // See wingdi.h from Windows SDK for windows internal nested enum definitions // See generic win32 error codes for windows internal return val definiion [DllImport("User32.dll", CharSet = CharSet.Auto)] private static extern int QueryDisplayConfig( // DatabaseCurrent not supported (since we can't marshal required CurrentTopologyId values for it) QueryDisplayConfigFlags flags, ref uint numPathArrayElements, [Out] DisplayConfigPathInfo[] pathInfoArray, ref uint modeInfoArrayElements, [Out] DisplayConfigModeInfo[] modeInfoArray, // The actual type is a nullable out DisplayConfigTopologyId only required if flags has DatabaseCurrent // An IntPtr can still be marshaled allowing us to pass something recognized as a null pointer // TODO support somehow passing an actual DisplayConfigTopologyId if needed (marshalas IsAny?) IntPtr currentTopologyId ); // Wrapper to get around incompatibilities with more generic typing in powershell and make it clear topology id is not supported public static int QueryDisplayConfig( QueryDisplayConfigFlags flags, ref uint pathsCount, [In, Out] ref DisplayConfigPathInfo[] paths, ref uint modesCount, [In, Out] ref DisplayConfigModeInfo[] modes ) { paths = new DisplayConfigPathInfo[pathsCount]; modes = new DisplayConfigModeInfo[modesCount]; int result = QueryDisplayConfig(flags, ref pathsCount, paths, ref modesCount, modes, IntPtr.Zero); // QueryDisplayConfig may return more than predicted, truncate the array to the predicted size. Array.Resize(ref paths, (int)pathsCount); Array.Resize(ref modes, (int)modesCount); return result; } // See WinUser.h from Windows SDK for windows internal method definition // See generic win32 error codes for windows internal return val definiion [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int DisplayConfigGetDeviceInfo( [In, Out] ref DisplayConfigTargetDeviceName targetDeviceName ); [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int DisplayConfigGetDeviceInfo( [In, Out] ref DisplayConfigGetAdvancedColorInfo getAdvancedColorInfo ); [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int DisplayConfigGetDeviceInfo( [In, Out] ref DisplayConfigTargetPreferredMode targetPreferredMode ); [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int DisplayConfigGetDeviceInfo( [In, Out] ref DisplayConfigAdapterName adapterName ); [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int DisplayConfigGetDeviceInfo( [In, Out] ref DisplayConfigSourceDeviceName sourceDeviceName ); // TODO marshall and implement the below for logging purposes // [DllImport("User32.dll", CharSet = CharSet.Auto)] // public static extern int DisplayConfigGetDeviceInfo( // [In, Out] ref DisplayConfigTargetAdapterName targetAdapterName // ); // See WinUser.h from Windows SDK for windows internal method definition // See wingdi.h from Windows SDK for windows internal nested enum definitions // See generic win32 error codes for windows internal return val definiion [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int SetDisplayConfig( uint numPathArrayElements, [In] DisplayConfigPathInfo[] pathArray, uint numModeInfoArrayElements, [In] DisplayConfigModeInfo[] modeInfoArray, SetDisplayConfigFlags flags ); [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int DisplayConfigSetDeviceInfo( [In, Out] ref DisplayConfigSetAdvancedColorInfo setAdvancedColorInfo ); public enum DisplayConfigTopologyId : uint { DISPLAYCONFIG_TOPOLOGY_INTERNAL = 0x00000001, DISPLAYCONFIG_TOPOLOGY_CLONE = 0x00000002, DISPLAYCONFIG_TOPOLOGY_EXTEND = 0x00000004, DISPLAYCONFIG_TOPOLOGY_EXTERNAL = 0x00000008, DISPLAYCONFIG_TOPOLOGY_FORCE_UINT32 = 0xFFFFFFFF } [StructLayout(LayoutKind.Sequential)] public struct LUID { public uint LowPart; public int HighPart; } [Flags] public enum DisplayConfigVideoOutputTechnology : uint { Other = 4294967295, // -1 Hd15 = 0, Svideo = 1, CompositeVideo = 2, ComponentVideo = 3, Dvi = 4, Hdmi = 5, Lvds = 6, DJpn = 8, Sdi = 9, DisplayportExternal = 10, DisplayportEmbedded = 11, UdiExternal = 12, UdiEmbedded = 13, Sdtvdongle = 14, Internal = 0x80000000, ForceUint32 = 0xFFFFFFFF } [Flags] public enum SetDisplayConfigFlags : uint { None = 0x0, TopologyInternal = 0x00000001, TopologyClone = 0x00000002, TopologyExtend = 0x00000004, TopologyExternal = 0x00000008, TopologySupplied = 0x00000010, UseSuppliedDisplayConfig = 0x00000020, Validate = 0x00000040, Apply = 0x00000080, NoOptimization = 0x00000100, SaveToDatabase = 0x00000200, AllowChanges = 0x00000400, PathPersistIfRequired = 0x00000800, ForceModeEnumeration = 0x00001000, AllowPathOrderChanges = 0x00002000, UseDatabaseCurrent = TopologyInternal | TopologyClone | TopologyExtend | TopologyExternal } [Flags] public enum DisplayConfigSourceStatus : uint { None = 0x0, InUse = 0x00000001 } [Flags] public enum DisplayConfigTargetStatus : uint { Nne = 0x0, InUse = 0x00000001, FORCIBLE = 0x00000002, ForcedAvailabilityBoot = 0x00000004, ForcedAvailabilityPath = 0x00000008, ForcedAvailabilitySystem = 0x00000010, } [Flags] public enum DisplayConfigRotation : uint { None = 0x0, Identity = 1, Rotate90 = 2, Rotate180 = 3, Rotate270 = 4, ForceUint32 = 0xFFFFFFFF } [Flags] public enum DisplayConfigPixelFormat : uint { None = 0x0, Pixelformat8Bpp = 1, Pixelformat16Bpp = 2, Pixelformat24Bpp = 3, Pixelformat32Bpp = 4, PixelformatNongdi = 5, PixelformatForceUint32 = 0xffffffff } [Flags] public enum DisplayConfigScaling : uint { None = 0x0, Identity = 1, Centered = 2, Stretched = 3, Aspectratiocenteredmax = 4, Custom = 5, Preferred = 128, ForceUint32 = 0xFFFFFFFF } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigRational { public uint numerator; public uint denominator; } [Flags] public enum DisplayConfigScanLineOrdering : uint { Unspecified = 0, Progressive = 1, Interlaced = 2, InterlacedUpperfieldfirst = Interlaced, InterlacedLowerfieldfirst = 3, ForceUint32 = 0xFFFFFFFF } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigPathInfo { public DisplayConfigPathSourceInfo sourceInfo; public DisplayConfigPathTargetInfo targetInfo; public DisplayConfigPathInfoFlags flags; } [Flags] public enum DisplayConfigPathInfoFlags : uint { None = 0x0, PathActive = 0x00000001, PathSupportVirtualMode = 0x00000008, PathBoostRefreshRate = 0x00000010 } [Flags] public enum DisplayConfigModeInfoType : uint { None = 0x0, Source = 1, Target = 2, ForceUint32 = 0xFFFFFFFF } [StructLayout(LayoutKind.Explicit)] public struct DisplayConfigModeInfo { [FieldOffset((0))] public DisplayConfigModeInfoType infoType; [FieldOffset(4)] public uint id; [FieldOffset(8)] public LUID adapterId; [FieldOffset(16)] public DisplayConfigTargetMode targetMode; [FieldOffset(16)] public DisplayConfigSourceMode sourceMode; } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfig2DRegion { public uint cx; public uint cy; } [Flags] public enum D3DmdtVideoSignalStandard : uint { Uninitialized = 0, VesaDmt = 1, VesaGtf = 2, VesaCvt = 3, Ibm = 4, Apple = 5, NtscM = 6, NtscJ = 7, Ntsc443 = 8, PalB = 9, PalB1 = 10, PalG = 11, PalH = 12, PalI = 13, PalD = 14, PalN = 15, PalNc = 16, SecamB = 17, SecamD = 18, SecamG = 19, SecamH = 20, SecamK = 21, SecamK1 = 22, SecamL = 23, SecamL1 = 24, Eia861 = 25, Eia861A = 26, Eia861B = 27, PalK = 28, PalK1 = 29, PalL = 30, PalM = 31, Other = 255 } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigVideoSignalInfo { public long pixelRate; public DisplayConfigRational hSyncFreq; public DisplayConfigRational vSyncFreq; public DisplayConfig2DRegion activeSize; public DisplayConfig2DRegion totalSize; public D3DmdtVideoSignalStandard videoStandard; public DisplayConfigScanLineOrdering ScanLineOrdering; } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigTargetMode { public DisplayConfigVideoSignalInfo targetVideoSignalInfo; } [StructLayout(LayoutKind.Sequential)] public struct PointL { public long x; public long y; } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigSourceMode { public uint width; public uint height; public DisplayConfigPixelFormat pixelFormat; public PointL position; } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigPathSourceInfo { public LUID adapterId; public uint id; public uint modeInfoIdx; public DisplayConfigSourceStatus statusFlags; } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigPathTargetInfo { public LUID adapterId; public uint id; public uint modeInfoIdx; public DisplayConfigVideoOutputTechnology outputTechnology; public DisplayConfigRotation rotation; public DisplayConfigScaling scaling; public DisplayConfigRational refreshRate; public DisplayConfigScanLineOrdering scanLineOrdering; public bool targetAvailable; public DisplayConfigTargetStatus statusFlags; } [Flags] public enum QueryDisplayConfigFlags : uint { None = 0x0, AllPaths = 0x00000001, OnlyActivePaths = 0x00000002, DatabaseCurrent = 0x00000004 } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigDeviceInfoHeader { public DisplayConfigDeviceInfoType type; public uint size; public LUID adapterId; public uint id; } public enum DisplayConfigDeviceInfoType : uint { DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME = 1, DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME = 2, DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_PREFERRED_MODE = 3, DISPLAYCONFIG_DEVICE_INFO_GET_ADAPTER_NAME = 4, DISPLAYCONFIG_DEVICE_INFO_SET_TARGET_PERSISTENCE = 5, DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_BASE_TYPE = 6, DISPLAYCONFIG_DEVICE_INFO_GET_SUPPORT_VIRTUAL_RESOLUTION = 7, DISPLAYCONFIG_DEVICE_INFO_SET_SUPPORT_VIRTUAL_RESOLUTION = 8, DISPLAYCONFIG_DEVICE_INFO_GET_ADVANCED_COLOR_INFO = 9, DISPLAYCONFIG_DEVICE_INFO_SET_ADVANCED_COLOR_STATE = 10, DISPLAYCONFIG_DEVICE_INFO_GET_SDR_WHITE_LEVEL = 11, DISPLAYCONFIG_DEVICE_INFO_FORCE_UINT32 = 0xFFFFFFFF } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct DisplayConfigSourceDeviceName { public DisplayConfigDeviceInfoHeader header; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public string viewGdiDeviceName; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct DisplayConfigAdapterName { public DisplayConfigDeviceInfoHeader header; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] public string adapterDevicePath; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct DisplayConfigTargetDeviceName { public DisplayConfigDeviceInfoHeader header; public DisplayConfigTargetDeviceNameFlags flags; public DisplayConfigVideoOutputTechnology outputTechnology; public ushort edidManufacturerId; public ushort edidProductCodeId; public uint connectorInstance; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)] public string monitorFriendlyDeviceName; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] public string monitorDevicePath; } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigTargetDeviceNameFlags { public DisplayConfigTargetDeviceNameFlagValue value; } [Flags] public enum DisplayConfigTargetDeviceNameFlagValue : uint { FRIENDLY_NAME_FROM_EDID = 0x00000001, FRIENDLY_NAME_FORCED = 0x00000002, EDID_IS_VALID = 0x00000004, RESERVED = 0xFFFFFFF8 } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigTargetPreferredMode { public DisplayConfigDeviceInfoHeader header; public uint width; public uint height; public DisplayConfigTargetMode targetMode; } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigGetAdvancedColorInfo { public DisplayConfigDeviceInfoHeader header; public DisplayConfigGetAdvancedColorInfoValues values; public DisplayConfigColorEncoding colorEncoding; public int bitsPerColorChannel; } [Flags] public enum DisplayConfigGetAdvancedColorInfoValues : uint { // A type of advanced color is supported AdvancedColorSupported = 0x1, // A type of advanced color is enabled AdvancedColorEnabled = 0x2, // Wide color gamut is enabled WideColorEnforced = 0x4, // Advanced color is force disabled due to system/OS policy AdvancedColorForceDisabled = 0x8 } public enum DisplayConfigColorEncoding : uint { DISPLAYCONFIG_COLOR_ENCODING_RGB = 0, DISPLAYCONFIG_COLOR_ENCODING_YCBCR444 = 1, DISPLAYCONFIG_COLOR_ENCODING_YCBCR422 = 2, DISPLAYCONFIG_COLOR_ENCODING_YCBCR420 = 3, DISPLAYCONFIG_COLOR_ENCODING_INTENSITY = 4, } [StructLayout(LayoutKind.Sequential)] public struct DisplayConfigSetAdvancedColorInfo { public DisplayConfigDeviceInfoHeader header; public DisplayConfigSetAdvancedColorInfoValues values; } [Flags] public enum DisplayConfigSetAdvancedColorInfoValues : uint { EnableAdvancedColor = 0x1 } } |