internal EgsDeviceHidReportsUpdateByWin32RawInput()
{
latestRawInputKind = NativeMethods.RawInputHeaderType.None;
rawInputDataBufferSize = 0;
reportAsByteArrayActualLength = 0;
int bRawDataOfMouseMaxLength = Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER)) + Marshal.SizeOf(typeof(NativeMethods.RAWMOUSE));
int offsetForHid = Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER)) + Marshal.SizeOf(typeof(NativeMethods.RAWHID));
int bRawDataOfMaxHid64BytesLength = offsetForHid + 64;
int bRawDataMaxLength = Math.Max(bRawDataOfMouseMaxLength, bRawDataOfMaxHid64BytesLength);
bRawData = new byte[bRawDataMaxLength];
int touchReportMaxLength = Math.Max(Marshal.SizeOf(typeof(NativeMethods.RAWMOUSE)), 64);
reportAsByteArray = new byte[64];
}
bool CopyRawInputToDataByteArray(IntPtr lParam)
{
int dwSize = 0;
int rawInputHeaderSize = Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER));
//If pData is NULL, the required size of the buffer is returned in *pcbSize.
NativeMethods.GetRawInputData(lParam, (uint)NativeMethods.RID.INPUT, IntPtr.Zero, ref dwSize, rawInputHeaderSize);
if (dwSize > rawInputDataBufferSize)
{
rawInputDataBufferSize = dwSize;
ReleaseRawInputPtr();
}
if (rawInputPtr == IntPtr.Zero)
{
// allocate unmanaged memory, must be released by Marshal.FreeHGlobal in ReleaseRawInputDataBuffer()
rawInputPtr = Marshal.AllocHGlobal((int)rawInputDataBufferSize);
if (rawInputPtr == IntPtr.Zero)
{
if (ApplicationCommonSettings.IsDebugging)
{
Debugger.Break();
}
return(false);
}
}
try
{
if (NativeMethods.GetRawInputData(lParam, (uint)NativeMethods.RID.INPUT, rawInputPtr, ref dwSize, rawInputHeaderSize) != dwSize)
{
if (ApplicationCommonSettings.IsDebugging)
{
Debugger.Break();
}
return(false);
}
rawInput = (NativeMethods.RAWINPUT)Marshal.PtrToStructure(rawInputPtr, typeof(NativeMethods.RAWINPUT));
//Debug.WriteLine("rawInput.header.hDevice: " + rawInput.header.hDevice);
latestRawInputKind = rawInput.header.dwType;
int offset = 0;
reportAsByteArrayActualLength = 0;
switch (latestRawInputKind)
{
case NativeMethods.RawInputHeaderType.Hid:
offset = Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER)) + Marshal.SizeOf(typeof(NativeMethods.RAWHID));
reportAsByteArrayActualLength = rawInput.hid.dwSizeHid;
break;
case NativeMethods.RawInputHeaderType.Mouse:
offset = Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER));
reportAsByteArrayActualLength = Marshal.SizeOf(typeof(NativeMethods.RAWMOUSE));
break;
case NativeMethods.RawInputHeaderType.Keyboard:
return(false);
break;
default:
return(false);
break;
}
if (reportAsByteArrayActualLength > 64)
{
return(false);
}
Marshal.Copy(rawInputPtr, bRawData, 0, offset + reportAsByteArrayActualLength);
Array.Copy(bRawData, offset, reportAsByteArray, 0, reportAsByteArrayActualLength);
return(true);
}
catch (Exception ex)
{
if (ApplicationCommonSettings.IsDebugging)
{
Debugger.Break();
}
Debug.WriteLine(ex.Message);
return(false);
}
}
