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
return(false);
}
float right;
float bottom;
float physicalHeight = 0;
var physicalHeightCap = Capability.GetCapability(Capabilities.PhysicalHeight, _applicationId, SourceId);
if (physicalHeightCap != null && physicalHeightCap.Count == 1)
{
physicalHeight = ValueConverter.ConvertToFix32(physicalHeightCap[0]);
}
float physicalWidth = 0;
var physicalWidthCap = Capability.GetCapability(Capabilities.PhysicalWidth, _applicationId, SourceId);
if (physicalWidthCap != null && physicalWidthCap.Count == 1)
{
physicalWidth = ValueConverter.ConvertToFix32(physicalWidthCap[0]);
}
right = physicalWidth < area.Right ? physicalWidth : area.Right;
bottom = physicalHeight < area.Bottom ? physicalHeight : area.Bottom;
var imageLayout = new ImageLayout
{
Frame = new Frame
{
Left = new Fix32(area.Left),
Top = new Fix32(area.Top),
Right = new Fix32(right),
Bottom = new Fix32(bottom)
}
};
var result = Twain32Native.DsImageLayout(
_applicationId,
SourceId,
DataGroup.Image,
DataArgumentType.ImageLayout,
Message.Set,
imageLayout);
if (result != TwainResult.Success && result != TwainResult.CheckStatus)
{
var condition = DataSourceManager.GetConditionCode(_applicationId, SourceId);
return(false);
//throw new TwainException("DsImageLayout.GetDefault error", result, condition);
}
return(true);
}
public SourceSettings GetAwailableSourceSettings()
{
var pixelTypes = new List <ushort>();
var pixelTypesCap = Capability.GetCapability(Capabilities.IPixelType, _applicationId, SourceId);
if (pixelTypesCap != null)
{
foreach (var pt in pixelTypesCap)
{
pixelTypes.Add((ushort)pt);
}
}
_log.Debug("Get pixel types: success, count: " + pixelTypes.Count);
float physicalHeight = 0;
var physicalHeightCap = Capability.GetCapability(Capabilities.PhysicalHeight, _applicationId, SourceId);
if (physicalHeightCap != null && physicalHeightCap.Count == 1)
{
physicalHeight = ValueConverter.ConvertToFix32(physicalHeightCap[0]);
_log.Debug("Get physical height: success, value: " + physicalHeight);
}
float physicalWidth = 0;
var physicalWidthCap = Capability.GetCapability(Capabilities.PhysicalWidth, _applicationId, SourceId);
if (physicalWidthCap != null && physicalWidthCap.Count == 1)
{
physicalWidth = ValueConverter.ConvertToFix32(physicalWidthCap[0]);
_log.Debug("Get physical width: success, value: " + physicalWidth);
}
bool hasADF, hasFlatbed;
var flatbedResolutions = new List <float>();
var feederResolutions = new List <float>();
try
{
var documentFeederEnabled = Capability.GetBoolCapability(Capabilities.FeederEnabled, _applicationId, SourceId);
if (documentFeederEnabled)
{
feederResolutions = GetResolutions();
Capability.SetCapability(Capabilities.FeederEnabled, false, _applicationId, SourceId);
var newDocumentFeederEnabled = Capability.GetBoolCapability(Capabilities.FeederEnabled, _applicationId, SourceId);
hasADF = true;
hasFlatbed = !newDocumentFeederEnabled;
_log.Debug(string.Format("Get document feeder enabled: success, hasFlatbed: {0}, hasADF: {1}, feederEnabledInitial: {2}", hasFlatbed, hasADF, documentFeederEnabled));
if (hasFlatbed)
{
flatbedResolutions = GetResolutions();
}
}
else
{
flatbedResolutions = GetResolutions();
Capability.SetCapability(Capabilities.FeederEnabled, true, _applicationId, SourceId);
var newDocumentFeederEnabled = Capability.GetBoolCapability(Capabilities.FeederEnabled, _applicationId, SourceId);
hasADF = newDocumentFeederEnabled;
hasFlatbed = true;
_log.Debug(string.Format("Get document feeder enabled: success, hasFlatbed: {0}, hasADF: {1}, feederEnabledInitial: {2}", hasFlatbed, hasADF, documentFeederEnabled));
if (hasADF)
{
feederResolutions = GetResolutions();
}
}
}
catch (Exception)
{
hasADF = false;
hasFlatbed = true;
_log.Debug(string.Format("Get document feeder enabled: not supported, hasFlatbed: {0}, hasADF: {1}",
hasFlatbed, hasADF));
flatbedResolutions = GetResolutions();
}
var hasDuplex = false;
try
{
var duplexCap = Capability.GetCapability(Capabilities.Duplex, _applicationId, SourceId);
if (duplexCap == null)
{
hasDuplex = false;
}
else
{
foreach (var value in duplexCap)
{
if ((Duplex)value == Duplex.None)
{
hasDuplex = false;
break;
}
if ((Duplex)value == Duplex.OnePass || (Duplex)value == Duplex.TwoPass)
{
hasDuplex = true;
}
}
}
_log.Debug(string.Format("Has duplex: success, value: {0}", hasDuplex));
}
catch (Exception)
{
_log.Debug(string.Format("Has duplex: not supported, value: false"));
hasDuplex = false;
}
_log.Debug("GetCapabilities, result: Success");
return(new SourceSettings(flatbedResolutions, feederResolutions, pixelTypes, physicalHeight, physicalWidth, hasADF, hasFlatbed, hasDuplex));
}