public static extern ReturnCode DsmWin32(
[In, Out] TW_IDENTITY origin,
[In, Out] TW_IDENTITY destination,
DataGroups dg,
DataArgumentType dat,
Message msg,
ref TW_CALLBACK2 data);
internal void RegisterCallback()
{
// TODO: support other platforms
var callbackPtr = Marshal.GetFunctionPointerForDelegate(_callback32Delegate);
// try new callback first
var cb2 = new TW_CALLBACK2 {
CallBackProc = callbackPtr
};
var rc = DGControl.Callback2.RegisterCallback(ref cb2);
if (rc == ReturnCode.Success)
{
Debug.WriteLine("Registed Callback2 success.");
}
else
{
var status = GetStatus();
Debug.WriteLine($"Register Callback2 failed with condition code: {status.ConditionCode}.");
}
if (rc != ReturnCode.Success)
{
// always register old callback
var cb = new TW_CALLBACK {
CallBackProc = callbackPtr
};
rc = DGControl.Callback.RegisterCallback(ref cb);
if (rc == ReturnCode.Success)
{
Debug.WriteLine("Registed Callback success.");
}
else
{
var status = GetStatus();
Debug.WriteLine($"Register Callback failed with {status.ConditionCode}.");
}
}
}
public ReturnCode RegisterCallback(ref TW_CALLBACK2 callback2)
{
if (Is32Bit)
{
if (IsWin)
{
return(NativeMethods.DsmWin32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.Callback2, Message.RegisterCallback, ref callback2));
}
if (IsLinux)
{
return(NativeMethods.DsmLinux32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.Callback2, Message.RegisterCallback, ref callback2));
}
if (IsMac)
{
return(NativeMethods.DsmMac32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.Callback2, Message.RegisterCallback, ref callback2));
}
}
if (IsWin)
{
return(NativeMethods.DsmWin64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.Callback2, Message.RegisterCallback, ref callback2));
}
if (IsLinux)
{
return(NativeMethods.DsmLinux64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.Callback2, Message.RegisterCallback, ref callback2));
}
if (IsMac)
{
return(NativeMethods.DsmMac64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.Callback2, Message.RegisterCallback, ref callback2));
}
return(ReturnCode.Failure);
}
/// <summary>
/// Convert the contents of a string to an callback2 structure...
/// </summary>
/// <param name="a_twcallback2">A TWAIN structure</param>
/// <param name="a_szCallback2">A CSV string of the TWAIN structure</param>
/// <returns>True if the conversion is successful</returns>
public bool CsvToCallback2(ref TW_CALLBACK2 a_twcallback2, string a_szCallback2)
{
// Init stuff...
a_twcallback2 = default(TW_CALLBACK2);
// Build the string...
try
{
string[] asz = CSV.Parse(a_szCallback2);
// Grab the values...
a_twcallback2.CallBackProc = (IntPtr)UInt64.Parse(asz[0]);
a_twcallback2.RefCon = (UIntPtr)UInt64.Parse(asz[1]);
a_twcallback2.Message = ushort.Parse(asz[2]);
}
catch
{
return (false);
}
// All done...
return (true);
}
/// <summary>
/// Convert the contents of a callback2 to a string that we can show in
/// our simple GUI...
/// </summary>
/// <param name="a_twcallback2">A TWAIN structure</param>
/// <returns>A CSV string of the TWAIN structure</returns>
public string Callback2ToCsv(TW_CALLBACK2 a_twcallback2)
{
try
{
CSV csv = new CSV();
csv.Add(a_twcallback2.CallBackProc.ToString());
csv.Add(a_twcallback2.RefCon.ToString());
csv.Add(a_twcallback2.Message.ToString());
return (csv.Get());
}
catch
{
return ("***error***");
}
}
/// <summary>
/// Issue callback2 commands...
/// </summary>
/// <param name="a_dg">Data group</param>
/// <param name="a_msg">Operation</param>
/// <param name="a_twcallback2">Callback2 structure</param>
/// <returns>TWAIN status</returns>
public STS DatCallback2(DG a_dg, MSG a_msg, ref TW_CALLBACK2 a_twcallback2)
{
STS sts;
// Submit the work to the TWAIN thread...
if ((m_threadTwain != null) && (m_threadTwain.ManagedThreadId != Thread.CurrentThread.ManagedThreadId))
{
lock (m_lockTwain)
{
// Set our command variables...
ThreadData threaddata = default(ThreadData);
threaddata.twcallback2 = a_twcallback2;
threaddata.dg = a_dg;
threaddata.msg = a_msg;
threaddata.dat = DAT.CALLBACK;
long lIndex = m_twaincommand.Submit(threaddata);
// Submit the command and wait for the reply...
CallerToThreadSet();
ThreadToCallerWaitOne();
// Return the result...
a_twcallback2 = m_twaincommand.Get(lIndex).twcallback2;
sts = m_twaincommand.Get(lIndex).sts;
// Clear the command variables...
m_twaincommand.Delete(lIndex);
}
return (sts);
}
// Log it...
if (Log.GetLevel() > 0)
{
Log.LogSendBefore(a_dg.ToString(), DAT.CALLBACK2.ToString(), a_msg.ToString(), Callback2ToCsv(a_twcallback2));
}
// Windows...
if (ms_platform == Platform.WINDOWS)
{
// Issue the command...
try
{
if (m_blUseLegacyDSM)
{
sts = (STS)WindowsTwain32DsmEntryCallback2(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.CALLBACK2, a_msg, ref a_twcallback2);
}
else
{
sts = (STS)WindowsTwaindsmDsmEntryCallback2(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.CALLBACK2, a_msg, ref a_twcallback2);
}
}
catch
{
// The driver crashed...
Log.LogSendAfter(STS.BUMMER.ToString(), "");
return (STS.BUMMER);
}
}
// Linux...
else if (ms_platform == Platform.LINUX)
{
// Issue the command...
try
{
if (GetMachineWordBitSize() == 32)
{
sts = (STS)LinuxDsmEntryCallback2(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.CALLBACK2, a_msg, ref a_twcallback2);
}
else
{
sts = (STS)Linux64DsmEntryCallback2(ref m_twidentityApp, ref m_twidentityDs, a_dg, DAT.CALLBACK2, a_msg, ref a_twcallback2);
}
}
catch
{
// The driver crashed...
Log.LogSendAfter(STS.BUMMER.ToString(), "");
return (STS.BUMMER);
}
}
// Mac OS X, which has to be different...
else if (ms_platform == Platform.MACOSX)
{
// Issue the command...
try
{
sts = (STS)MacosxDsmEntryCallback2(ref m_twidentitymacosxApp, IntPtr.Zero, a_dg, DAT.CALLBACK2, a_msg, ref a_twcallback2);
}
catch
{
// The driver crashed...
Log.LogSendAfter(STS.BUMMER.ToString(), "");
return (STS.BUMMER);
}
}
// Uh-oh...
else
{
Log.LogSendAfter(STS.BUMMER.ToString(), "");
return (STS.BUMMER);
}
// Log it...
if (Log.GetLevel() > 0)
{
Log.LogSendAfter(sts.ToString(), Callback2ToCsv(a_twcallback2));
}
// All done...
return (AutoDatStatus(sts));
}
private static extern UInt16 MacosxDsmEntryCallback2
(
ref TW_IDENTITY_MACOSX origin,
IntPtr dest,
DG dg,
DAT dat,
MSG msg,
ref TW_CALLBACK2 twcallback
);
private static extern UInt16 Linux64DsmEntryCallback2
(
ref TW_IDENTITY origin,
ref TW_IDENTITY dest,
DG dg,
DAT dat,
MSG msg,
ref TW_CALLBACK2 twcallback2
);
private static extern UInt16 WindowsTwaindsmDsmEntryCallback2
(
ref TW_IDENTITY_LEGACY origin,
ref TW_IDENTITY_LEGACY dest,
DG dg,
DAT dat,
MSG msg,
ref TW_CALLBACK2 twcallback2
);
