public static extern ReturnCode DsmWin32(
[In, Out] TW_IDENTITY origin,
[In, Out] TW_IDENTITY destination,
DataGroups dg,
DataArgumentType dat,
Message msg,
ref TW_PENDINGXFERS data);
ReturnCode DoIt(Message msg, ref TW_PENDINGXFERS pendingXfers)
{
if (Is32Bit)
{
if (IsWin)
{
return(NativeMethods.DsmWin32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.PendingXfers, msg, ref pendingXfers));
}
if (IsLinux)
{
return(NativeMethods.DsmLinux32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.PendingXfers, msg, ref pendingXfers));
}
if (IsMac)
{
return(NativeMethods.DsmMac32(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.PendingXfers, msg, ref pendingXfers));
}
}
if (IsWin)
{
return(NativeMethods.DsmWin64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.PendingXfers, msg, ref pendingXfers));
}
if (IsLinux)
{
return(NativeMethods.DsmLinux64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.PendingXfers, msg, ref pendingXfers));
}
if (IsMac)
{
return(NativeMethods.DsmMac64(Session.Config.App32, Session.CurrentSource.Identity32,
DataGroups.Control, DataArgumentType.PendingXfers, msg, ref pendingXfers));
}
return(ReturnCode.Failure);
}
private void DoTransferRoutine()
{
var xMech = GetTransferMechs();
TW_PENDINGXFERS pending = default;
var rc = DGControl.PendingXfers.Get(ref pending);
if (rc == ReturnCode.Success)
{
do
{
var readyArgs = new TransferReadyEventArgs(CurrentSource, pending.Count, pending.EndOfJob)
{
CancelAll = _disableDSNow
};
OnTransferReady(readyArgs);
#region actually handle xfer
if (readyArgs.CancelAll || _disableDSNow)
{
rc = DGControl.PendingXfers.Reset(ref pending);
}
else
{
if (!readyArgs.CancelCurrent)
{
if (xMech.ImageMech.HasValue)
{
switch (xMech.ImageMech.Value)
{
case XferMech.Memory:
rc = DoImageMemoryXfer();
break;
case XferMech.File:
rc = DoImageFileXfer();
break;
case XferMech.MemFile:
rc = DoImageMemoryFileXfer();
break;
case XferMech.Native:
default: // always assume native
rc = DoImageNativeXfer();
break;
}
}
if (xMech.AudioMech.HasValue)
{
switch (xMech.AudioMech.Value)
{
case XferMech.File:
rc = DoAudioFileXfer();
break;
case XferMech.Native:
default: // always assume native
rc = DoAudioNativeXfer();
break;
}
}
}
if (rc != ReturnCode.Success)// && StopOnTransferError)
{
// end xfer without setting rc to exit (good/bad?)
DGControl.PendingXfers.Reset(ref pending);
}
else
{
rc = DGControl.PendingXfers.EndXfer(ref pending);
}
}
#endregion
} while (rc == ReturnCode.Success && pending.Count != 0 && !_disableDSNow);
}
else
{
HandleXferReturnCode(rc);
}
if (_disableDSNow)
{
DGControl.UserInterface.DisableDS(ref _lastEnableUI, false);
}
}
/// <summary>
/// If CapAutoScan is TRUE, this command will stop the operation of the scanner’s automatic
/// feeder. No other action is taken.
/// </summary>
/// <param name="pendingXfers">The pending xfers.</param>
/// <returns></returns>
public ReturnCode StopFeeder(ref TW_PENDINGXFERS pendingXfers)
{
return(DoIt(Message.StopFeeder, ref pendingXfers));
}
/// <summary>
/// Sets the number of pending transfers in the Source to zero.
/// </summary>
/// <param name="pendingXfers">The pending xfers.</param>
/// <returns></returns>
internal ReturnCode Reset(ref TW_PENDINGXFERS pendingXfers)
{
return(DoIt(Message.Reset, ref pendingXfers));
}
/// <summary>
/// Returns the number of transfers the Source is ready to supply to the application, upon demand.
/// If DAT_XFERGROUP is set to DG_Image, this is the number of images. If DAT_XFERGROUP is set
/// to DG_AUDIO, this is the number of audio snippets for the current image. If there is no current
/// image, this call must return Failure / SeqError.
/// </summary>
/// <param name="pendingXfers">The pending xfers.</param>
/// <returns></returns>
public ReturnCode Get(ref TW_PENDINGXFERS pendingXfers)
{
return(DoIt(Message.Get, ref pendingXfers));
}
/// <summary>
/// This triplet is used to cancel or terminate a transfer. Issued in state 6, this triplet cancels the next
/// pending transfer, discards the transfer data, and decrements the pending transfers count. In
/// state 7, this triplet terminates the current transfer. If any data has not been transferred (this is
/// only possible during a memory transfer) that data is discarded.
/// </summary>
/// <param name="pendingXfers">The pending xfers.</param>
/// <returns></returns>
internal ReturnCode EndXfer(ref TW_PENDINGXFERS pendingXfers)
{
return(DoIt(Message.EndXfer, ref pendingXfers));
}
/// <summary>
/// Issue pendingxfers commands...
/// </summary>
/// <param name="a_dg">Data group</param>
/// <param name="a_msg">Operation</param>
/// <param name="a_twpendingxfers">PENDINGXFERS structure</param>
/// <returns>TWAIN status</returns>
public STS DatPendingxfers(DG a_dg, MSG a_msg, ref TW_PENDINGXFERS a_twpendingxfers)
{
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.twpendingxfers = a_twpendingxfers;
threaddata.dg = a_dg;
threaddata.msg = a_msg;
threaddata.dat = DAT.PENDINGXFERS;
long lIndex = m_twaincommand.Submit(threaddata);
// Submit the command and wait for the reply...
CallerToThreadSet();
ThreadToCallerWaitOne();
// Return the result...
a_twpendingxfers = m_twaincommand.Get(lIndex).twpendingxfers;
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.PENDINGXFERS.ToString(), a_msg.ToString(), "");
}
// Windows...
if (ms_platform == Platform.WINDOWS)
{
// Issue the command...
try
{
if (m_blUseLegacyDSM)
{
sts = (STS)WindowsTwain32DsmEntryPendingxfers(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.PENDINGXFERS, a_msg, ref a_twpendingxfers);
}
else
{
sts = (STS)WindowsTwaindsmDsmEntryPendingxfers(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.PENDINGXFERS, a_msg, ref a_twpendingxfers);
}
}
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)LinuxDsmEntryPendingxfers(ref m_twidentitylegacyApp, ref m_twidentitylegacyDs, a_dg, DAT.PENDINGXFERS, a_msg, ref a_twpendingxfers);
}
else
{
sts = (STS)Linux64DsmEntryPendingxfers(ref m_twidentityApp, ref m_twidentityDs, a_dg, DAT.PENDINGXFERS, a_msg, ref a_twpendingxfers);
}
}
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)MacosxDsmEntryPendingxfers(ref m_twidentitymacosxApp, ref m_twidentitymacosxDs, a_dg, DAT.PENDINGXFERS, a_msg, ref a_twpendingxfers);
}
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(), PendingxfersToCsv(a_twpendingxfers));
}
// If we endxfer, go to state 5 or 6...
if (a_msg == MSG.ENDXFER)
{
if (sts == STS.SUCCESS)
{
if (a_twpendingxfers.Count == 0)
{
m_blIsMsgxferready = false;
m_state = STATE.S5;
}
else
{
m_state = STATE.S6;
}
}
}
// If we reset, go to state 5...
else if (a_msg == MSG.RESET)
{
if (sts == STS.SUCCESS)
{
m_blIsMsgxferready = false;
m_state = STATE.S5;
}
}
// All done...
return (AutoDatStatus(sts));
}
/// <summary>
/// Convert the contents of a pending xfers structure to a string that
/// we can show in our simple GUI...
/// </summary>
/// <param name="a_twsetupfilexfer">A TWAIN structure</param>
/// <returns>A CSV string of the TWAIN structure</returns>
public string PendingxfersToCsv(TW_PENDINGXFERS a_twpendingxfers)
{
try
{
CSV csv = new CSV();
csv.Add(a_twpendingxfers.Count.ToString());
csv.Add(a_twpendingxfers.EOJ.ToString());
return (csv.Get());
}
catch
{
return ("***error***");
}
}
private static extern UInt16 MacosxDsmEntryPendingxfers
(
ref TW_IDENTITY_MACOSX origin,
ref TW_IDENTITY_MACOSX dest,
DG dg,
DAT dat,
MSG msg,
ref TW_PENDINGXFERS twpendingxfers
);
private static extern UInt16 Linux64DsmEntryPendingxfers
(
ref TW_IDENTITY origin,
ref TW_IDENTITY dest,
DG dg,
DAT dat,
MSG msg,
ref TW_PENDINGXFERS twpendingxfers
);
private static extern UInt16 WindowsTwaindsmDsmEntryPendingxfers
(
ref TW_IDENTITY_LEGACY origin,
ref TW_IDENTITY_LEGACY dest,
DG dg,
DAT dat,
MSG msg,
ref TW_PENDINGXFERS twpendingxfers
);