static void DoTwainWork()
{
Console.WriteLine("Getting ready to do twain stuff on thread {0}...", Thread.CurrentThread.ManagedThreadId);
Thread.Sleep(1000);
var rc = twain.Open();
if (rc == ReturnCode.Success)
{
var hit = twain.FirstOrDefault(s => string.Equals(s.Name, SAMPLE_SOURCE));
if (hit == null)
{
Console.WriteLine("The sample source \"" + SAMPLE_SOURCE + "\" is not installed.");
twain.Close();
}
else
{
rc = hit.Open();
if (rc == ReturnCode.Success)
{
Console.WriteLine("Starting capture from the sample source...");
rc = hit.Enable(SourceEnableMode.NoUI, false, IntPtr.Zero);
}
else
{
twain.Close();
}
}
}
else
{
Console.WriteLine("Failed to open dsm with rc={0}!", rc);
}
}
private void btnScan_Click(object sender, EventArgs e)
{
if (String.IsNullOrEmpty(cboxScanner.Text))
{
MessageBox.Show("You must set a scanner");
return;
}
if (String.IsNullOrEmpty(cboxFlipType.Text))
{
MessageBox.Show("You must set a orientation");
return;
}
if (String.IsNullOrEmpty(cboxPixelType.Text))
{
MessageBox.Show("You must set a color");
return;
}
if (String.IsNullOrEmpty(tbFileName.Text.Trim()))
{
MessageBox.Show("You must set a document name");
return;
}
try
{
DocumentName = tbFileName.Text.Trim();
btnPreview.Enabled = false;
btnStore.Enabled = false;
PdfData = null;
images.Clear();
if (dataSource != null && dataSource.IsOpen)
{
dataSource.Close();
}
dataSource = session.FirstOrDefault(x => x.Name == cboxScanner.Text);
dataSource.Open();
dataSource.Capabilities.CapFeederEnabled.SetValue(BoolType.True);
dataSource.Capabilities.CapDuplexEnabled.SetValue(cbDuplex.Checked ? BoolType.True : BoolType.False);
dataSource.Capabilities.ICapSupportedSizes.SetValue(SupportedSize.None);
dataSource.Capabilities.ICapFlipRotation.SetValue(cboxFlipType.Text == "Fanfold" ? FlipRotation.Fanfold : FlipRotation.Book);
dataSource.Capabilities.ICapPixelType.SetValue(cboxPixelType.Text == "Black and White" ? PixelType.BlackWhite : PixelType.RGB);
dataSource.Capabilities.ICapImageFileFormat.SetValue(FileFormat.Png);
dataSource.Enable(SourceEnableMode.NoUI, true, this.Handle);
mSettings.ScannerName = cboxScanner.Text;
mSettings.ScannerDuplex = cbDuplex.Checked;
mSettings.ScannerFlipType = cboxFlipType.Text;
mSettings.ScannerPixelType = cboxPixelType.Text;
}
catch (Exception ex)
{
Common.Log.Error("Scanning of document failed on scanner " + cboxScanner.Text, ex);
}
}
public void Scan()
{
var applicationID = TWIdentity.CreateFromAssembly(DataGroups.Image, Assembly.GetExecutingAssembly());
Session = new TwainSession(applicationID);
Session.TransferReady += Session_TransferReady;
Session.DataTransferred += Session_DataTransferred;
Session.SourceDisabled += Session_SourceDisabled;
Session.Open();
DataSource dataSource = Session.FirstOrDefault();
dataSource.Open();
dataSource.Enable(SourceEnableMode.NoUI, false, WindowHandle);
}
public List <ScannedImage> Scan(IWin32Window dialogParent, bool activate, ScanDevice scanDevice, ScanProfile scanProfile, ScanParams scanParams)
{
if (scanProfile.TwainImpl == TwainImpl.Legacy)
{
return(Legacy.TwainApi.Scan(scanProfile, scanDevice, dialogParent, formFactory));
}
PlatformInfo.Current.PreferNewDSM = scanProfile.TwainImpl != TwainImpl.OldDsm;
var session = new TwainSession(TwainAppId);
var twainForm = formFactory.Create <FTwainGui>();
var images = new List <ScannedImage>();
Exception error = null;
bool cancel = false;
DataSource ds = null;
int pageNumber = 0;
session.TransferReady += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TransferReady");
if (cancel)
{
eventArgs.CancelAll = true;
}
};
session.DataTransferred += (sender, eventArgs) =>
{
try
{
Debug.WriteLine("NAPS2.TW - DataTransferred");
pageNumber++;
using (var output = scanProfile.TwainImpl == TwainImpl.MemXfer
? GetBitmapFromMemXFer(eventArgs.MemoryData, eventArgs.ImageInfo)
: Image.FromStream(eventArgs.GetNativeImageStream()))
{
using (var result = scannedImageHelper.PostProcessStep1(output, scanProfile))
{
if (blankDetector.ExcludePage(result, scanProfile))
{
return;
}
var bitDepth = output.PixelFormat == PixelFormat.Format1bppIndexed
? ScanBitDepth.BlackWhite
: ScanBitDepth.C24Bit;
var image = new ScannedImage(result, bitDepth, scanProfile.MaxQuality, scanProfile.Quality);
image.SetThumbnail(thumbnailRenderer.RenderThumbnail(result));
if (scanParams.DetectPatchCodes)
{
foreach (var patchCodeInfo in eventArgs.GetExtImageInfo(ExtendedImageInfo.PatchCode))
{
if (patchCodeInfo.ReturnCode == ReturnCode.Success)
{
image.PatchCode = GetPatchCode(patchCodeInfo);
}
}
}
scannedImageHelper.PostProcessStep2(image, result, scanProfile, scanParams, pageNumber);
images.Add(image);
}
}
}
catch (Exception ex)
{
Debug.WriteLine("NAPS2.TW - DataTransferred - Error");
error = ex;
cancel = true;
twainForm.Close();
}
};
session.TransferError += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TransferError");
if (eventArgs.Exception != null)
{
error = eventArgs.Exception;
}
else if (eventArgs.SourceStatus != null)
{
Log.Error("TWAIN Transfer Error. Return code = {0}; condition code = {1}; data = {2}.",
eventArgs.ReturnCode, eventArgs.SourceStatus.ConditionCode, eventArgs.SourceStatus.Data);
}
else
{
Log.Error("TWAIN Transfer Error. Return code = {0}.", eventArgs.ReturnCode);
}
cancel = true;
twainForm.Close();
};
session.SourceDisabled += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - SourceDisabled");
twainForm.Close();
};
twainForm.Shown += (sender, eventArgs) =>
{
if (activate)
{
// TODO: Set this flag based on whether NAPS2 already has focus
// http://stackoverflow.com/questions/7162834/determine-if-current-application-is-activated-has-focus
// Or maybe http://stackoverflow.com/questions/156046/show-a-form-without-stealing-focus
twainForm.Activate();
}
Debug.WriteLine("NAPS2.TW - TwainForm.Shown");
try
{
ReturnCode rc = session.Open(new WindowsFormsMessageLoopHook(dialogParent.Handle));
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Could not open session - {0}", rc);
twainForm.Close();
return;
}
ds = session.FirstOrDefault(x => x.Name == scanDevice.ID);
if (ds == null)
{
Debug.WriteLine("NAPS2.TW - Could not find DS - DS count = {0}", session.Count());
throw new DeviceNotFoundException();
}
rc = ds.Open();
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Could not open DS - {0}", rc);
twainForm.Close();
return;
}
ConfigureDS(ds, scanProfile, scanParams);
var ui = scanProfile.UseNativeUI ? SourceEnableMode.ShowUI : SourceEnableMode.NoUI;
Debug.WriteLine("NAPS2.TW - Enabling DS");
rc = ds.Enable(ui, true, twainForm.Handle);
Debug.WriteLine("NAPS2.TW - Enable finished");
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Enable failed - {0}, rc");
twainForm.Close();
}
}
catch (Exception ex)
{
Debug.WriteLine("NAPS2.TW - Error");
error = ex;
twainForm.Close();
}
};
Debug.WriteLine("NAPS2.TW - Showing TwainForm");
twainForm.ShowDialog(dialogParent);
Debug.WriteLine("NAPS2.TW - TwainForm closed");
if (ds != null && session.IsSourceOpen)
{
Debug.WriteLine("NAPS2.TW - Closing DS");
ds.Close();
}
if (session.IsDsmOpen)
{
Debug.WriteLine("NAPS2.TW - Closing session");
session.Close();
}
if (error != null)
{
Debug.WriteLine("NAPS2.TW - Throwing error - {0}", error);
if (error is ScanDriverException)
{
throw error;
}
throw new ScanDriverUnknownException(error);
}
return(images);
}
public override List<Image> Scan()
{
Console.WriteLine("Scan Twain");
lesImagesNum.Clear();
// can use the utility method to create appId or make one yourself
var appId = TWIdentity.CreateFromAssembly(DataGroups.Image, Assembly.GetExecutingAssembly());
// new it up and handle events
session = new TwainSession(appId);
session.TransferReady += session_TransferReady;
session.DataTransferred += session_DataTransferred;
session.SourceDisabled += session_SourceDisable;
// finally open it
session.Open();
var t = session.GetEnumerator();
Console.WriteLine(t.ToString());
while (t.MoveNext())
{
Console.WriteLine(t.ConvertToString());
}
// choose and open the first source found
// note that TwainSession implements IEnumerable<DataSource> so we can use this extension method.
IEnumerable<DataSource> lesSources = session.GetSources();
Console.WriteLine("Nb Source : " + session.Count());
myDS = session.FirstOrDefault();
myDS.Open();
// All low-level triplet operations are defined through these properties.
// If the operation you want is not available, that most likely means
// it's not for consumer use or it's been abstracted away with an equivalent API in this lib.
//myDS.DGControl;
//myDS.DGImage.;
// The wrapper has many methods that corresponds to the TWAIN capability triplet msgs like
// GetValues(), GetCurrent(), GetDefault(), SetValue(), etc.
// (see TWAIN spec for reference)
// This example sets pixel type of scanned image to BW and
// IPixelType is the wrapper property on the data source.
// The name of the wrapper property is the same as the CapabilityId enum.
PixelType typeCouleur = PixelType.Gray;
if (myDS.Capabilities.ICapPixelType.CanSet &&
myDS.Capabilities.ICapPixelType.GetValues().Contains(typeCouleur))
{
myDS.Capabilities.ICapPixelType.SetValue(typeCouleur);
}
//Même chose avec le DPI
TWFix32 DPI = MainWindow.numerisationDPI;
if(myDS.Capabilities.ICapXResolution.CanSet &&
myDS.Capabilities.ICapXResolution.GetValues().Contains(DPI))
{
myDS.Capabilities.ICapXResolution.SetValue(DPI);
}
if (myDS.Capabilities.ICapYResolution.CanSet &&
myDS.Capabilities.ICapYResolution.GetValues().Contains(DPI))
{
myDS.Capabilities.ICapYResolution.SetValue(DPI);
}
myDS.Enable(SourceEnableMode.ShowUI, false, System.IntPtr.Zero);
EventWaitHandle session_SourceDisable_Wait = new EventWaitHandle(false, EventResetMode.AutoReset);
session_SourceDisable_Wait.WaitOne();
return lesImagesNum;
}
protected override IEnumerable <IScannedImage> ScanInternal()
{
var session = new TwainSession(TwainAppId);
var twainForm = formFactory.Create <FTwainGui>();
var images = new List <IScannedImage>();
Exception error = null;
bool cancel = false;
DataSource ds = null;
session.TransferReady += (sender, eventArgs) =>
{
if (cancel)
{
eventArgs.CancelAll = true;
}
};
session.DataTransferred += (sender, eventArgs) =>
{
using (var output = Image.FromStream(eventArgs.GetNativeImageStream()))
{
double scaleFactor = 1;
if (!ScanSettings.UseNativeUI)
{
scaleFactor = ScanSettings.AfterScanScale.ToIntScaleFactor();
}
using (var result = ImageScaleHelper.ScaleImage(output, scaleFactor))
{
var bitDepth = output.PixelFormat == PixelFormat.Format1bppIndexed
? ScanBitDepth.BlackWhite
: ScanBitDepth.C24Bit;
images.Add(scannedImageFactory.Create(result, bitDepth, ScanSettings.MaxQuality));
}
}
};
session.TransferError += (sender, eventArgs) =>
{
error = eventArgs.Exception;
cancel = true;
twainForm.Close();
};
session.SourceDisabled += (sender, eventArgs) => twainForm.Close();
twainForm.Shown += (sender, eventArgs) =>
{
try
{
ReturnCode rc = session.Open(new WindowsFormsMessageLoopHook(DialogParent.Handle));
if (rc != ReturnCode.Success)
{
twainForm.Close();
return;
}
ds = session.FirstOrDefault(x => x.Name == ScanDevice.ID);
if (ds == null)
{
throw new DeviceNotFoundException();
}
rc = ds.Open();
if (rc != ReturnCode.Success)
{
twainForm.Close();
return;
}
ConfigureDS(ds);
var ui = ScanSettings.UseNativeUI ? SourceEnableMode.ShowUI : SourceEnableMode.NoUI;
rc = ds.Enable(ui, true, twainForm.Handle);
if (rc != ReturnCode.Success)
{
twainForm.Close();
}
}
catch (Exception ex)
{
error = ex;
twainForm.Close();
}
};
twainForm.ShowDialog(DialogParent);
if (ds != null && session.IsSourceOpen)
{
ds.Close();
}
if (session.IsDsmOpen)
{
session.Close();
}
if (error != null)
{
if (error is ScanDriverException)
{
throw error;
}
throw new ScanDriverUnknownException(error);
}
return(images);
}
private void InternalScan(TwainImpl twainImpl, IWin32Window dialogParent, ScanDevice scanDevice, ScanProfile scanProfile, ScanParams scanParams,
CancellationToken cancelToken, ScannedImageSource.Concrete source, Action <ScannedImage, ScanParams, string> runBackgroundOcr)
{
if (dialogParent == null)
{
dialogParent = new BackgroundForm();
}
if (twainImpl == TwainImpl.Legacy)
{
Legacy.TwainApi.Scan(scanProfile, scanDevice, dialogParent, formFactory, source);
return;
}
PlatformInfo.Current.PreferNewDSM = twainImpl != TwainImpl.OldDsm;
var session = new TwainSession(TwainAppId);
var twainForm = Invoker.Current.InvokeGet(() => scanParams.NoUI ? null : formFactory.Create <FTwainGui>());
Exception error = null;
bool cancel = false;
DataSource ds = null;
var waitHandle = new AutoResetEvent(false);
int pageNumber = 0;
session.TransferReady += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TransferReady");
if (cancel)
{
eventArgs.CancelAll = true;
}
};
session.DataTransferred += (sender, eventArgs) =>
{
try
{
Debug.WriteLine("NAPS2.TW - DataTransferred");
pageNumber++;
using (var output = twainImpl == TwainImpl.MemXfer
? GetBitmapFromMemXFer(eventArgs.MemoryData, eventArgs.ImageInfo)
: Image.FromStream(eventArgs.GetNativeImageStream()))
{
using (var result = scannedImageHelper.PostProcessStep1(output, scanProfile))
{
if (blankDetector.ExcludePage(result, scanProfile))
{
return;
}
var bitDepth = output.PixelFormat == PixelFormat.Format1bppIndexed
? ScanBitDepth.BlackWhite
: ScanBitDepth.C24Bit;
var image = new ScannedImage(result, bitDepth, scanProfile.MaxQuality, scanProfile.Quality);
if (scanParams.DetectPatchCodes)
{
foreach (var patchCodeInfo in eventArgs.GetExtImageInfo(ExtendedImageInfo.PatchCode))
{
if (patchCodeInfo.ReturnCode == ReturnCode.Success)
{
image.PatchCode = GetPatchCode(patchCodeInfo);
}
}
}
scannedImageHelper.PostProcessStep2(image, result, scanProfile, scanParams, pageNumber);
string tempPath = scannedImageHelper.SaveForBackgroundOcr(result, scanParams);
runBackgroundOcr(image, scanParams, tempPath);
source.Put(image);
}
}
}
catch (Exception ex)
{
Debug.WriteLine("NAPS2.TW - DataTransferred - Error");
error = ex;
cancel = true;
StopTwain();
}
};
session.TransferError += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TransferError");
if (eventArgs.Exception != null)
{
error = eventArgs.Exception;
}
else if (eventArgs.SourceStatus != null)
{
Log.Error("TWAIN Transfer Error. Return code = {0}; condition code = {1}; data = {2}.",
eventArgs.ReturnCode, eventArgs.SourceStatus.ConditionCode, eventArgs.SourceStatus.Data);
}
else
{
Log.Error("TWAIN Transfer Error. Return code = {0}.", eventArgs.ReturnCode);
}
cancel = true;
StopTwain();
};
session.SourceDisabled += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - SourceDisabled");
StopTwain();
};
void StopTwain()
{
waitHandle.Set();
if (!scanParams.NoUI)
{
Invoker.Current.Invoke(() => twainForm.Close());
}
}
void InitTwain()
{
try
{
var windowHandle = (Invoker.Current as Form)?.Handle;
ReturnCode rc = windowHandle != null?session.Open(new WindowsFormsMessageLoopHook(windowHandle.Value)) : session.Open();
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Could not open session - {0}", rc);
StopTwain();
return;
}
ds = session.FirstOrDefault(x => x.Name == scanDevice.ID);
if (ds == null)
{
Debug.WriteLine("NAPS2.TW - Could not find DS - DS count = {0}", session.Count());
throw new DeviceNotFoundException();
}
rc = ds.Open();
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Could not open DS - {0}", rc);
StopTwain();
return;
}
ConfigureDS(ds, scanProfile, scanParams);
var ui = scanProfile.UseNativeUI ? SourceEnableMode.ShowUI : SourceEnableMode.NoUI;
Debug.WriteLine("NAPS2.TW - Enabling DS");
rc = scanParams.NoUI ? ds.Enable(ui, true, windowHandle ?? IntPtr.Zero) : ds.Enable(ui, true, twainForm.Handle);
Debug.WriteLine("NAPS2.TW - Enable finished");
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Enable failed - {0}, rc");
StopTwain();
}
else
{
cancelToken.Register(() =>
{
Debug.WriteLine("NAPS2.TW - User Cancel");
cancel = true;
session.ForceStepDown(5);
});
}
}
catch (Exception ex)
{
Debug.WriteLine("NAPS2.TW - Error");
error = ex;
StopTwain();
}
}
if (!scanParams.NoUI)
{
twainForm.Shown += (sender, eventArgs) => { InitTwain(); };
twainForm.Closed += (sender, args) => waitHandle.Set();
}
if (scanParams.NoUI)
{
Debug.WriteLine("NAPS2.TW - Init with no form");
Invoker.Current.Invoke(InitTwain);
}
else if (!scanParams.Modal)
{
Debug.WriteLine("NAPS2.TW - Init with non-modal form");
Invoker.Current.Invoke(() => twainForm.Show(dialogParent));
}
else
{
Debug.WriteLine("NAPS2.TW - Init with modal form");
Invoker.Current.Invoke(() => twainForm.ShowDialog(dialogParent));
}
waitHandle.WaitOne();
Debug.WriteLine("NAPS2.TW - Operation complete");
if (ds != null && session.IsSourceOpen)
{
Debug.WriteLine("NAPS2.TW - Closing DS");
ds.Close();
}
if (session.IsDsmOpen)
{
Debug.WriteLine("NAPS2.TW - Closing session");
session.Close();
}
if (error != null)
{
Debug.WriteLine("NAPS2.TW - Throwing error - {0}", error);
if (error is ScanDriverException)
{
throw error;
}
throw new ScanDriverUnknownException(error);
}
}
protected override IEnumerable<IScannedImage> ScanInternal()
{
if (ScanProfile.TwainImpl == TwainImpl.Legacy)
{
return Legacy.TwainApi.Scan(ScanProfile, ScanDevice, DialogParent, formFactory, scannedImageFactory);
}
var session = new TwainSession(TwainAppId);
var twainForm = formFactory.Create<FTwainGui>();
var images = new List<IScannedImage>();
Exception error = null;
bool cancel = false;
DataSource ds = null;
session.TransferReady += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TransferReady");
if (cancel)
{
eventArgs.CancelAll = true;
}
};
session.DataTransferred += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - DataTransferred");
using (var output = Image.FromStream(eventArgs.GetNativeImageStream()))
{
using (var result = ScannedImageHelper.PostProcessStep1(output, ScanProfile))
{
var bitDepth = output.PixelFormat == PixelFormat.Format1bppIndexed
? ScanBitDepth.BlackWhite
: ScanBitDepth.C24Bit;
var image = scannedImageFactory.Create(result, bitDepth, ScanProfile.MaxQuality, ScanProfile.Quality);
ScannedImageHelper.PostProcessStep2(image, ScanProfile);
if (ScanParams.DetectPatchCodes)
{
foreach (var patchCodeInfo in eventArgs.GetExtImageInfo(ExtendedImageInfo.PatchCode))
{
if (patchCodeInfo.ReturnCode == ReturnCode.Success)
{
image.PatchCode = GetPatchCode(patchCodeInfo);
}
}
}
images.Add(image);
}
}
};
session.TransferError += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TransferError");
if (eventArgs.Exception != null)
{
error = eventArgs.Exception;
}
else if (eventArgs.SourceStatus != null)
{
Log.Error("TWAIN Transfer Error. Return code = {0}; condition code = {1}; data = {2}.",
eventArgs.ReturnCode, eventArgs.SourceStatus.ConditionCode, eventArgs.SourceStatus.Data);
}
else
{
Log.Error("TWAIN Transfer Error. Return code = {0}.", eventArgs.ReturnCode);
}
cancel = true;
twainForm.Close();
};
session.SourceDisabled += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - SourceDisabled");
twainForm.Close();
};
twainForm.Shown += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TwainForm.Shown");
try
{
ReturnCode rc = session.Open(new WindowsFormsMessageLoopHook(DialogParent.Handle));
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Could not open session - {0}", rc);
twainForm.Close();
return;
}
ds = session.FirstOrDefault(x => x.Name == ScanDevice.ID);
if (ds == null)
{
Debug.WriteLine("NAPS2.TW - Could not find DS - DS count = {0}", session.Count());
throw new DeviceNotFoundException();
}
rc = ds.Open();
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Could not open DS - {0}", rc);
twainForm.Close();
return;
}
ConfigureDS(ds);
var ui = ScanProfile.UseNativeUI ? SourceEnableMode.ShowUI : SourceEnableMode.NoUI;
Debug.WriteLine("NAPS2.TW - Enabling DS");
rc = ds.Enable(ui, true, twainForm.Handle);
Debug.WriteLine("NAPS2.TW - Enable finished");
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Enable failed - {0}, rc");
twainForm.Close();
}
}
catch (Exception ex)
{
Debug.WriteLine("NAPS2.TW - Error");
error = ex;
twainForm.Close();
}
};
Debug.WriteLine("NAPS2.TW - Showing TwainForm");
twainForm.ShowDialog(DialogParent);
Debug.WriteLine("NAPS2.TW - TwainForm closed");
if (ds != null && session.IsSourceOpen)
{
Debug.WriteLine("NAPS2.TW - Closing DS");
ds.Close();
}
if (session.IsDsmOpen)
{
Debug.WriteLine("NAPS2.TW - Closing session");
session.Close();
}
if (error != null)
{
Debug.WriteLine("NAPS2.TW - Throwing error - {0}", error);
if (error is ScanDriverException)
{
throw error;
}
throw new ScanDriverUnknownException(error);
}
return images;
}
public List<ScannedImage> Scan(IWin32Window dialogParent, bool activate, ScanDevice scanDevice, ScanProfile scanProfile, ScanParams scanParams)
{
if (scanProfile.TwainImpl == TwainImpl.Legacy)
{
return Legacy.TwainApi.Scan(scanProfile, scanDevice, dialogParent, formFactory);
}
var session = new TwainSession(TwainAppId);
var twainForm = formFactory.Create<FTwainGui>();
var images = new List<ScannedImage>();
Exception error = null;
bool cancel = false;
DataSource ds = null;
session.TransferReady += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TransferReady");
if (cancel)
{
eventArgs.CancelAll = true;
}
};
session.DataTransferred += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - DataTransferred");
using (var output = Image.FromStream(eventArgs.GetNativeImageStream()))
{
using (var result = ScannedImageHelper.PostProcessStep1(output, scanProfile))
{
if (blankDetector.ExcludePage(result, scanProfile))
{
return;
}
var bitDepth = output.PixelFormat == PixelFormat.Format1bppIndexed
? ScanBitDepth.BlackWhite
: ScanBitDepth.C24Bit;
var image = new ScannedImage(result, bitDepth, scanProfile.MaxQuality, scanProfile.Quality);
ScannedImageHelper.PostProcessStep2(image, scanProfile);
if (scanParams.DetectPatchCodes)
{
foreach (var patchCodeInfo in eventArgs.GetExtImageInfo(ExtendedImageInfo.PatchCode))
{
if (patchCodeInfo.ReturnCode == ReturnCode.Success)
{
image.PatchCode = GetPatchCode(patchCodeInfo);
}
}
}
images.Add(image);
}
}
};
session.TransferError += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - TransferError");
if (eventArgs.Exception != null)
{
error = eventArgs.Exception;
}
else if (eventArgs.SourceStatus != null)
{
Log.Error("TWAIN Transfer Error. Return code = {0}; condition code = {1}; data = {2}.",
eventArgs.ReturnCode, eventArgs.SourceStatus.ConditionCode, eventArgs.SourceStatus.Data);
}
else
{
Log.Error("TWAIN Transfer Error. Return code = {0}.", eventArgs.ReturnCode);
}
cancel = true;
twainForm.Close();
};
session.SourceDisabled += (sender, eventArgs) =>
{
Debug.WriteLine("NAPS2.TW - SourceDisabled");
twainForm.Close();
};
twainForm.Shown += (sender, eventArgs) =>
{
if (activate)
{
// TODO: Set this flag based on whether NAPS2 already has focus
// http://stackoverflow.com/questions/7162834/determine-if-current-application-is-activated-has-focus
// Or maybe http://stackoverflow.com/questions/156046/show-a-form-without-stealing-focus
twainForm.Activate();
}
Debug.WriteLine("NAPS2.TW - TwainForm.Shown");
try
{
ReturnCode rc = session.Open(new WindowsFormsMessageLoopHook(dialogParent.Handle));
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Could not open session - {0}", rc);
twainForm.Close();
return;
}
ds = session.FirstOrDefault(x => x.Name == scanDevice.ID);
if (ds == null)
{
Debug.WriteLine("NAPS2.TW - Could not find DS - DS count = {0}", session.Count());
throw new DeviceNotFoundException();
}
rc = ds.Open();
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Could not open DS - {0}", rc);
twainForm.Close();
return;
}
ConfigureDS(ds, scanProfile, scanParams);
var ui = scanProfile.UseNativeUI ? SourceEnableMode.ShowUI : SourceEnableMode.NoUI;
Debug.WriteLine("NAPS2.TW - Enabling DS");
rc = ds.Enable(ui, true, twainForm.Handle);
Debug.WriteLine("NAPS2.TW - Enable finished");
if (rc != ReturnCode.Success)
{
Debug.WriteLine("NAPS2.TW - Enable failed - {0}, rc");
twainForm.Close();
}
}
catch (Exception ex)
{
Debug.WriteLine("NAPS2.TW - Error");
error = ex;
twainForm.Close();
}
};
Debug.WriteLine("NAPS2.TW - Showing TwainForm");
twainForm.ShowDialog(dialogParent);
Debug.WriteLine("NAPS2.TW - TwainForm closed");
if (ds != null && session.IsSourceOpen)
{
Debug.WriteLine("NAPS2.TW - Closing DS");
ds.Close();
}
if (session.IsDsmOpen)
{
Debug.WriteLine("NAPS2.TW - Closing session");
session.Close();
}
if (error != null)
{
Debug.WriteLine("NAPS2.TW - Throwing error - {0}", error);
if (error is ScanDriverException)
{
throw error;
}
throw new ScanDriverUnknownException(error);
}
return images;
}
protected override IEnumerable<IScannedImage> ScanInternal()
{
var session = new TwainSession(TwainAppId);
var twainForm = formFactory.Create<FTwainGui>();
var images = new List<IScannedImage>();
Exception error = null;
bool cancel = false;
DataSource ds = null;
session.TransferReady += (sender, eventArgs) =>
{
if (cancel)
{
eventArgs.CancelAll = true;
}
};
session.DataTransferred += (sender, eventArgs) =>
{
using (var output = Image.FromStream(eventArgs.GetNativeImageStream()))
{
double scaleFactor = 1;
if (!ScanSettings.UseNativeUI)
{
scaleFactor = ScanSettings.AfterScanScale.ToIntScaleFactor();
}
using (var result = ImageScaleHelper.ScaleImage(output, scaleFactor))
{
var bitDepth = output.PixelFormat == PixelFormat.Format1bppIndexed
? ScanBitDepth.BlackWhite
: ScanBitDepth.C24Bit;
images.Add(scannedImageFactory.Create(result, bitDepth, ScanSettings.MaxQuality));
}
}
};
session.TransferError += (sender, eventArgs) =>
{
error = eventArgs.Exception;
cancel = true;
twainForm.Close();
};
session.SourceDisabled += (sender, eventArgs) => twainForm.Close();
twainForm.Shown += (sender, eventArgs) =>
{
try
{
ReturnCode rc = session.Open(new WindowsFormsMessageLoopHook(DialogParent.Handle));
if (rc != ReturnCode.Success)
{
twainForm.Close();
return;
}
ds = session.FirstOrDefault(x => x.Name == ScanDevice.ID);
if (ds == null)
{
throw new DeviceNotFoundException();
}
rc = ds.Open();
if (rc != ReturnCode.Success)
{
twainForm.Close();
return;
}
ConfigureDS(ds);
var ui = ScanSettings.UseNativeUI ? SourceEnableMode.ShowUI : SourceEnableMode.NoUI;
rc = ds.Enable(ui, true, twainForm.Handle);
if (rc != ReturnCode.Success)
{
twainForm.Close();
}
}
catch (Exception ex)
{
error = ex;
twainForm.Close();
}
};
twainForm.ShowDialog(DialogParent);
if (ds != null && session.IsSourceOpen)
{
ds.Close();
}
if (session.IsDsmOpen)
{
session.Close();
}
if (error != null)
{
if (error is ScanDriverException)
{
throw error;
}
throw new ScanDriverUnknownException(error);
}
return images;
}
void DoTwainWork()
{
try
{
eventLog1.WriteEntry("Getting ready to do twain stuff on thread " + Thread.CurrentThread.ManagedThreadId);
//Thread.Sleep(1000);
twain = new TwainSession(TWIdentity.CreateFromAssembly(DataGroups.Image, Assembly.GetExecutingAssembly()));
twain.TransferReady += (s, e) =>
{
eventLog1.WriteEntry("Got xfer ready on thread " + Thread.CurrentThread.ManagedThreadId);
};
twain.DataTransferred += (s, e) =>
{
if (e.NativeData != IntPtr.Zero) //else if (!string.IsNullOrWhiteSpace(e.FileDataPath))
{
eventLog1.WriteEntry("SUCCESS! Got twain data on thread " + Thread.CurrentThread.ManagedThreadId);
try
{
byte[] msg = EncodeOutgoingMessage(e.DataSource.Name);
stream.Write(msg, 0, msg.Length);
stream.Flush();
eventLog1.WriteEntry("Attempting to read the image");
Stream imgStr = e.GetNativeImageStream();
if (imgStr != null)
{
eventLog1.WriteEntry("Attempting to read the image 1, length:" + imgStr.Length);
var imglen = EncodeOutgoingMessage("Img length:" + imgStr.Length.ToString());
stream.Write(imglen, 0, imglen.Length);
stream.Flush();
using (var memoryStream = new MemoryStream())
{
// !!!
imgStr.CopyTo(memoryStream);
var imgBytes = memoryStream.ToArray();
var b64img = Convert.ToBase64String(imgBytes);
var preparedBytes = EncodeOutgoingMessage(b64img);
stream.Write(preparedBytes, 0, preparedBytes.Length);
stream.Flush();
eventLog1.WriteEntry("Attempting to read the image 2");
}
}
else
{
eventLog1.WriteEntry("Attempting to read the image 3");
byte[] msgNoImg = EncodeOutgoingMessage("No image!?");
stream.Write(msgNoImg, 0, msgNoImg.Length);
stream.Flush();
}
}
catch (Exception ex)
{
eventLog1.WriteEntry("Error writing response! " + ex.Message + "\n" + ex.StackTrace);
}
}
else
{
eventLog1.WriteEntry("BUMMER! No twain data on thread " + Thread.CurrentThread.ManagedThreadId);
}
};
twain.SourceDisabled += (s, e) =>
{
eventLog1.WriteEntry("Source disabled on thread " + Thread.CurrentThread.ManagedThreadId);
var rc = twain.CurrentSource.Close();
rc = twain.Close();
};
}
catch (Exception ex)
{
eventLog1.WriteEntry("Error creating twain! " + ex.Message);
}
/////////////
try
{
var rc = twain.Open();
if (rc == ReturnCode.Success)
{
var hit = twain.FirstOrDefault(s => string.Equals(s.Name, SAMPLE_SOURCE));
if (hit == null)
{
eventLog1.WriteEntry("The sample source \"" + SAMPLE_SOURCE + "\" is not installed.");
twain.Close();
}
else
{
rc = hit.Open();
if (rc == ReturnCode.Success)
{
eventLog1.WriteEntry("Starting capture from the sample source...");
rc = hit.Enable(SourceEnableMode.NoUI, false, IntPtr.Zero);
}
else
{
twain.Close();
}
}
}
else
{
eventLog1.WriteEntry("Failed to open dsm with rc=" + rc);
}
}
catch (Exception ex)
{
eventLog1.WriteEntry("Error opening twain: " + ex.Message);
}
}
