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using Microsoft.Win32.SafeHandles;
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using System;
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using System.Runtime.InteropServices;
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namespace GenericHid
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{
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/// <summary>
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/// API declarations for HID communications.
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/// </summary>
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internal sealed partial class Hid
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{
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internal static class NativeMethods
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{
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// from hidpi.h
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// Typedef enum defines a set of integer constants for HidP_Report_Type
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internal const Int16 HidP_Input = 0;
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internal const Int16 HidP_Output = 1;
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internal const Int16 HidP_Feature = 2;
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[StructLayout(LayoutKind.Sequential)]
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internal struct HIDD_ATTRIBUTES
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{
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internal Int32 Size;
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internal UInt16 VendorID;
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internal UInt16 ProductID;
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internal UInt16 VersionNumber;
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}
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internal struct HIDP_CAPS
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{
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internal Int16 Usage;
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internal Int16 UsagePage;
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internal Int16 InputReportByteLength;
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internal Int16 OutputReportByteLength;
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internal Int16 FeatureReportByteLength;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] internal Int16[] Reserved;
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internal Int16 NumberLinkCollectionNodes;
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internal Int16 NumberInputButtonCaps;
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internal Int16 NumberInputValueCaps;
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internal Int16 NumberInputDataIndices;
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internal Int16 NumberOutputButtonCaps;
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internal Int16 NumberOutputValueCaps;
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internal Int16 NumberOutputDataIndices;
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internal Int16 NumberFeatureButtonCaps;
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internal Int16 NumberFeatureValueCaps;
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internal Int16 NumberFeatureDataIndices;
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}
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// If IsRange is false, UsageMin is the Usage and UsageMax is unused.
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// If IsStringRange is false, StringMin is the String index and StringMax is unused.
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// If IsDesignatorRange is false, DesignatorMin is the designator index and DesignatorMax is unused.
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internal struct HidP_Value_Caps
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{
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internal Int16 UsagePage;
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internal Byte ReportID;
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internal Int32 IsAlias;
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internal Int16 BitField;
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internal Int16 LinkCollection;
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internal Int16 LinkUsage;
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internal Int16 LinkUsagePage;
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internal Int32 IsRange;
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internal Int32 IsStringRange;
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internal Int32 IsDesignatorRange;
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internal Int32 IsAbsolute;
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internal Int32 HasNull;
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internal Byte Reserved;
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internal Int16 BitSize;
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internal Int16 ReportCount;
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internal Int16 Reserved2;
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internal Int16 Reserved3;
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internal Int16 Reserved4;
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internal Int16 Reserved5;
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internal Int16 Reserved6;
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internal Int32 LogicalMin;
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internal Int32 LogicalMax;
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internal Int32 PhysicalMin;
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internal Int32 PhysicalMax;
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internal Int16 UsageMin;
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internal Int16 UsageMax;
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internal Int16 StringMin;
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internal Int16 StringMax;
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internal Int16 DesignatorMin;
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internal Int16 DesignatorMax;
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internal Int16 DataIndexMin;
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internal Int16 DataIndexMax;
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}
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_FlushQueue(SafeFileHandle HidDeviceObject);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_FreePreparsedData(IntPtr PreparsedData);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_GetAttributes(SafeFileHandle HidDeviceObject, ref HIDD_ATTRIBUTES Attributes);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_GetFeature(SafeFileHandle HidDeviceObject, Byte[] lpReportBuffer,
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Int32 ReportBufferLength);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_GetInputReport(SafeFileHandle HidDeviceObject, Byte[] lpReportBuffer,
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Int32 ReportBufferLength);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern void HidD_GetHidGuid(ref Guid HidGuid);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_GetNumInputBuffers(SafeFileHandle HidDeviceObject, ref Int32 NumberBuffers);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_GetPreparsedData(SafeFileHandle HidDeviceObject, ref IntPtr PreparsedData);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_SetFeature(SafeFileHandle HidDeviceObject, Byte[] lpReportBuffer,
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Int32 ReportBufferLength);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_SetNumInputBuffers(SafeFileHandle HidDeviceObject, Int32 NumberBuffers);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Boolean HidD_SetOutputReport(SafeFileHandle HidDeviceObject, Byte[] lpReportBuffer,
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Int32 ReportBufferLength);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Int32 HidP_GetCaps(IntPtr PreparsedData, ref HIDP_CAPS Capabilities);
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[DllImport("hid.dll", SetLastError = true)]
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internal static extern Int32 HidP_GetValueCaps(Int32 ReportType, Byte[] ValueCaps, ref Int32 ValueCapsLength,
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IntPtr PreparsedData);
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}
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}
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}
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