public ScannedImageSource Scan()
{
if (!IsSupported)
{
throw new DriverNotSupportedException();
}
if (ScanProfile == null)
{
throw new InvalidOperationException("IScanDriver.ScanProfile must be specified before calling Scan().");
}
if (ScanParams == null)
{
throw new InvalidOperationException("IScanDriver.ScanParams must be specified before calling Scan().");
}
if (ScanDevice == null)
{
throw new InvalidOperationException("IScanDriver.ScanDevice must be specified before calling Scan().");
}
if (DialogParent == null && !ScanParams.NoUI)
{
throw new InvalidOperationException("IScanDriver.DialogParent must be specified before calling Scan() without NoUI.");
}
var source = new ScannedImageSource.Concrete();
Task.Factory.StartNew(async() =>
{
try
{
await ScanInternal(source);
source.Done();
}
catch (ScanDriverException e)
{
source.Error(e);
}
catch (FaultException <ScanDriverExceptionDetail> e)
{
source.Error(e.Detail.Exception);
}
catch (Exception e)
{
source.Error(new ScanDriverUnknownException(e));
}
}, TaskCreationOptions.LongRunning);
return(source);
}
public ScannedImageSource Import(string filePath, ImportParams importParams, ProgressHandler progressCallback, CancellationToken cancelToken)
{
var source = new ScannedImageSource.Concrete();
Task.Factory.StartNew(() =>
{
try
{
if (cancelToken.IsCancellationRequested)
{
source.Done();
return;
}
Bitmap toImport;
try
{
toImport = new Bitmap(filePath);
}
catch (Exception e)
{
Log.ErrorException("Error importing image: " + filePath, e);
// Handle and notify the user outside the method so that errors importing multiple files can be aggregated
throw;
}
using (toImport)
{
int frameCount = toImport.GetFrameCount(FrameDimension.Page);
int i = 0;
foreach (var frameIndex in importParams.Slice.Indices(frameCount))
{
progressCallback(i++, frameCount);
if (cancelToken.IsCancellationRequested)
{
source.Done();
return;
}
toImport.SelectActiveFrame(FrameDimension.Page, frameIndex);
var image = new ScannedImage(toImport, ScanBitDepth.C24Bit, IsLossless(toImport.RawFormat), -1);
if (!importParams.NoThumbnails)
{
image.SetThumbnail(thumbnailRenderer.RenderThumbnail(toImport));
}
if (importParams.DetectPatchCodes)
{
image.PatchCode = PatchCodeDetector.Detect(toImport);
}
source.Put(image);
}
progressCallback(frameCount, frameCount);
}
source.Done();
}
catch (Exception e)
{
source.Error(e);
}
}, TaskCreationOptions.LongRunning);
return(source);
}