/// <summary>
/// Negotiates the indicator.
/// </summary>
/// <param name="scanSettings">The scan settings.</param>
public void NegotiateProgressIndicator(ScanSettings scanSettings)
{
try
{
if (scanSettings.ShowProgressIndicatorUi.HasValue)
{
Capability.SetCapability(Capabilities.Indicators, scanSettings.ShowProgressIndicatorUi.Value, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
/// <summary>
/// Negotiates the automatic border detection capability.
/// </summary>
/// <param name="scanSettings">The scan settings.</param>
public void NegotiateAutomaticBorderDetection(ScanSettings scanSettings)
{
try
{
if (scanSettings.Rotation.AutomaticBorderDetection)
{
Capability.SetCapability(Capabilities.Automaticborderdetection, true, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
public void NegotiateDuplex(ScanSettings scanSettings)
{
try
{
if (scanSettings.UseDuplex.HasValue && SupportsDuplex)
{
Capability.SetCapability(Capabilities.DuplexEnabled, scanSettings.UseDuplex.Value, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
public void NegotiateTransferCount(ScanSettings scanSettings)
{
try
{
scanSettings.TransferCount = Capability.SetCapability(
Capabilities.XferCount,
scanSettings.TransferCount,
_applicationId,
SourceId);
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
/// <summary>
/// Negotiates the size of the page.
/// </summary>
/// <param name="scanSettings">The scan settings.</param>
public void NegotiatePageSize(ScanSettings scanSettings)
{
try
{
var cap = new Capability(Capabilities.Supportedsizes, TwainType.Int16, _applicationId, SourceId);
if ((PageType)cap.GetBasicValue().Int16Value != PageType.UsLetter)
{
Capability.SetBasicCapability(Capabilities.Supportedsizes, (ushort)scanSettings.Page.Size, TwainType.UInt16, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
private bool NegotiateArea(ScanSettings scanSettings)
{
var area = scanSettings.Area;
if (area == null)
{
return(false);
}
try
{
var cap = new Capability(Capabilities.IUnits, TwainType.Int16, _applicationId, SourceId);
if ((Units)cap.GetBasicValue().Int16Value != area.Units)
{
Capability.SetCapability(Capabilities.IUnits, (short)area.Units, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
var imageLayout = new ImageLayout
{
Frame = new Frame
{
Left = new Fix32(area.Left),
Top = new Fix32(area.Top),
Right = new Fix32(area.Right),
Bottom = new Fix32(area.Bottom)
}
};
var result = Twain32Native.DsImageLayout(
_applicationId,
SourceId,
DataGroup.Image,
DataArgumentType.ImageLayout,
Message.Set,
imageLayout);
if (result != TwainResult.Success)
{
throw new TwainException("DsImageLayout.GetDefault error", result);
}
return(true);
}
public void NegotiateOrientation(ScanSettings scanSettings)
{
// Set orientation (default is portrait)
try
{
var cap = new Capability(Capabilities.Orientation, TwainType.Int16, _applicationId, SourceId);
if ((Orientation)cap.GetBasicValue().Int16Value != Orientation.Default)
{
Capability.SetBasicCapability(Capabilities.Orientation, (ushort)scanSettings.Page.Orientation, TwainType.UInt16, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
public void NegotiateResolution(ScanSettings scanSettings)
{
try
{
if (scanSettings.Resolution.Dpi.HasValue)
{
int dpi = scanSettings.Resolution.Dpi.Value;
Capability.SetBasicCapability(Capabilities.XResolution, dpi, TwainType.Fix32, _applicationId, SourceId);
Capability.SetBasicCapability(Capabilities.YResolution, dpi, TwainType.Fix32, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
public short GetBitDepth(ScanSettings scanSettings)
{
switch (scanSettings.Resolution.ColourSetting)
{
case ColourSetting.BlackAndWhite:
return(1);
case ColourSetting.GreyScale:
return(8);
case ColourSetting.Colour:
return(16);
}
throw new NotImplementedException();
}
public PixelType GetPixelType(ScanSettings scanSettings)
{
switch (scanSettings.Resolution.ColourSetting)
{
case ColourSetting.BlackAndWhite:
return(PixelType.BlackAndWhite);
case ColourSetting.GreyScale:
return(PixelType.Grey);
case ColourSetting.Colour:
return(PixelType.Rgb);
}
throw new NotImplementedException();
}
public bool Open(ScanSettings settings)
{
OpenSource();
if (settings.AbortWhenNoPaperDetectable && !PaperDetectable)
{
throw new FeederEmptyException();
}
// Set whether or not to show progress window
NegotiateProgressIndicator(settings);
NegotiateTransferCount(settings);
NegotiateFeeder(settings);
NegotiateDuplex(settings);
NegotiateLightPath(settings);
if (settings.UseDocumentFeeder == true &&
settings.Page != null)
{
NegotiatePageSize(settings);
NegotiateOrientation(settings);
}
if (settings.Area != null)
{
NegotiateArea(settings);
}
if (settings.Resolution != null)
{
NegotiateColour(settings);
NegotiateResolution(settings);
}
// Configure automatic rotation and image border detection
if (settings.Rotation != null)
{
NegotiateAutomaticRotate(settings);
NegotiateAutomaticBorderDetection(settings);
}
return(Enable(settings));
}
public void NegotiateLightPath(ScanSettings scanSettings)
{
try
{
if (scanSettings.UseFilmScanner.HasValue && SupportsFilmScanner)
{
if (scanSettings.UseFilmScanner.Value == true)
{
Capability.SetBasicCapability(Capabilities.Lightpath, (ushort)Lightpath.Transmissive, TwainType.UInt16, _applicationId, SourceId);
}
else
{
Capability.SetBasicCapability(Capabilities.Lightpath, (ushort)Lightpath.Reflective, TwainType.UInt16, _applicationId, SourceId);
}
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
public void NegotiateFeeder(ScanSettings scanSettings)
{
try
{
if (scanSettings.UseDocumentFeeder.HasValue)
{
Capability.SetCapability(Capabilities.FeederEnabled, scanSettings.UseDocumentFeeder.Value, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
try
{
if (scanSettings.UseAutoFeeder.HasValue)
{
Capability.SetCapability(Capabilities.AutoFeed, scanSettings.UseAutoFeeder == true && scanSettings.UseDocumentFeeder == true, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
try
{
if (scanSettings.UseAutoScanCache.HasValue)
{
Capability.SetCapability(Capabilities.AutoScan, scanSettings.UseAutoScanCache.Value, _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
public void StartScan(ScanSettings settings)
{
bool scanning = false;
try
{
_messageHook.UseFilter = true;
scanning = DataSource.Open(settings);
}
catch (TwainException)
{
DataSource.Close();
EndingScan();
throw;
}
finally
{
// Remove the message hook if scan setup failed
if (!scanning)
{
EndingScan();
}
}
}
public bool Enable(ScanSettings settings)
{
var ui = new UserInterface
{
ShowUI = (short)(settings.ShowTwainUi ? 1 : 0),
ModalUI = 1,
ParentHand = _messageHook.WindowHandle
};
var result = Twain32Native.DsUserInterface(
_applicationId,
SourceId,
DataGroup.Control,
DataArgumentType.UserInterface,
Message.EnableDS,
ui);
if (result != TwainResult.Success)
{
Dispose();
return(false);
}
return(true);
}
public void NegotiateColour(ScanSettings scanSettings)
{
try
{
Capability.SetBasicCapability(Capabilities.IPixelType, (ushort)GetPixelType(scanSettings), TwainType.UInt16, _applicationId, SourceId);
}
catch
{
// Do nothing if the data source does not support the requested capability
}
// TODO: Also set this for colour scanning
try
{
if (scanSettings.Resolution.ColourSetting != ColourSetting.Colour)
{
Capability.SetCapability(Capabilities.BitDepth, GetBitDepth(scanSettings), _applicationId, SourceId);
}
}
catch
{
// Do nothing if the data source does not support the requested capability
}
}
/// <summary>
/// Starts scanning.
/// </summary>
public void StartScanning(ScanSettings settings)
{
_dataSourceManager.StartScan(settings);
}
