protected virtual Point GetCoordinate(short linkCollection, Screen currentScr, IntPtr pRawDataPacket)
{
int physicalX = 0;
int physicalY = 0;
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, linkCollection, NativeMethods.XCoordinateId, ref physicalX, _hPreparsedData.DangerousGetHandle(), pRawDataPacket, _dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, linkCollection, NativeMethods.YCoordinateId, ref physicalY, _hPreparsedData.DangerousGetHandle(), pRawDataPacket, _dwSizHid);
int x, y;
if (_isAxisCorresponds)
{
x = physicalX * currentScr.Bounds.Width / _physicalMax.X;
y = physicalY * currentScr.Bounds.Height / _physicalMax.Y;
}
else
{
x = physicalY * currentScr.Bounds.Width / _physicalMax.Y;
y = physicalX * currentScr.Bounds.Height / _physicalMax.X;
}
x = _xAxisDirection ? x : currentScr.Bounds.Width - x;
y = _yAxisDirection ? y : currentScr.Bounds.Height - y;
return(new Point(x + currentScr.Bounds.X, y + currentScr.Bounds.Y));
}
internal static IEnumerable <string> EnumeratePorts()
{
uint needed = 0;
uint returned = 0;
// As per MSDN, call EnumPorts with an empty buffer.
// This call will fail, but will populate 'needed' with the required size of the buffer.
using (SafeUnmanagedMemoryHandle nullBuffer = new SafeUnmanagedMemoryHandle(0))
{
EnumPorts(null, 2, nullBuffer, 0, ref needed, ref returned);
}
// Allocate the required memory and retrieve the port data
using (SafeUnmanagedMemoryHandle buffer = new SafeUnmanagedMemoryHandle((int)needed))
{
if (EnumPorts(null, 2, buffer, needed, ref needed, ref returned))
{
PortInfo[] ports = new PortInfo[returned];
IntPtr currentPort = buffer.DangerousGetHandle();
for (int i = 0; i < returned; i++)
{
ports[i] = Marshal.PtrToStructure <PortInfo>(currentPort);
currentPort = IntPtr.Add(currentPort, Marshal.SizeOf <PortInfo>());
}
return(ports.Select(n => n.PortName));
}
else
{
throw new Win32Exception();
}
}
}
internal static void XcvPortData(SafePrinterHandle xcvMonitor, string command, object portData)
{
// TCPMON XCV commands are listed at https://msdn.microsoft.com/en-us/windows/hardware/drivers/print/tcpmon-xcv-commands
int size = Marshal.SizeOf(portData);
using (SafeUnmanagedMemoryHandle inputDataPointer = new SafeUnmanagedMemoryHandle(size))
{
Marshal.StructureToPtr(portData, inputDataPointer.DangerousGetHandle(), true);
if (!XcvData(xcvMonitor, command, inputDataPointer, (uint)size, IntPtr.Zero, 0, out uint outputNeededSize, out uint status))
{
throw new Win32Exception();
}
}
}