| public static DeviceSupportsFeeder ( Device device ) : bool | ||
| device | Device | |
| return | bool | |
protected override IEnumerable <ScannedImage> ScanInternal()
{
using (var eventLoop = new WiaBackgroundEventLoop(ScanProfile, ScanDevice, threadFactory))
{
bool supportsFeeder = eventLoop.GetSync(wia => WiaApi.DeviceSupportsFeeder(wia.Device));
if (ScanProfile.PaperSource != ScanSource.Glass && !supportsFeeder)
{
throw new NoFeederSupportException();
}
bool supportsDuplex = eventLoop.GetSync(wia => WiaApi.DeviceSupportsDuplex(wia.Device));
if (ScanProfile.PaperSource == ScanSource.Duplex && !supportsDuplex)
{
throw new NoDuplexSupportException();
}
int pageNumber = 1;
int retryCount = 0;
bool retry = false;
bool cancel = false;
do
{
ScannedImage image;
try
{
if (pageNumber > 1 && ScanProfile.WiaDelayBetweenScans)
{
int delay = (int)(ScanProfile.WiaDelayBetweenScansSeconds.Clamp(0, 30) * 1000);
Thread.Sleep(delay);
}
image = TransferImage(eventLoop, pageNumber, out cancel);
pageNumber++;
retryCount = 0;
retry = false;
}
catch (ScanDriverException e)
{
if (ScanProfile.WiaRetryOnFailure && e.InnerException is COMException &&
(uint)((COMException)e.InnerException).ErrorCode == 0x80004005 && retryCount < MAX_RETRIES)
{
Thread.Sleep(1000);
retryCount += 1;
retry = true;
continue;
}
throw;
}
catch (Exception e)
{
throw new ScanDriverUnknownException(e);
}
if (image != null)
{
yield return(image);
}
} while (retry || (!cancel && ScanProfile.PaperSource != ScanSource.Glass));
}
}
protected override async Task ScanInternal(ScannedImageSource.Concrete source)
{
using (var eventLoop = new WiaBackgroundEventLoop(ScanProfile, ScanDevice))
{
bool supportsFeeder = eventLoop.GetSync(wia => WiaApi.DeviceSupportsFeeder(wia.Device));
if (ScanProfile.PaperSource != ScanSource.Glass && !supportsFeeder)
{
throw new NoFeederSupportException();
}
bool supportsDuplex = eventLoop.GetSync(wia => WiaApi.DeviceSupportsDuplex(wia.Device));
if (ScanProfile.PaperSource == ScanSource.Duplex && !supportsDuplex)
{
throw new NoDuplexSupportException();
}
int pageNumber = 1;
int retryCount = 0;
bool retry = false;
bool done = false;
do
{
ScannedImage image;
try
{
if (pageNumber > 1 && ScanProfile.WiaDelayBetweenScans)
{
int delay = (int)(ScanProfile.WiaDelayBetweenScansSeconds.Clamp(0, 30) * 1000);
Thread.Sleep(delay);
}
(image, done) = await TransferImage(eventLoop, pageNumber);
pageNumber++;
retryCount = 0;
retry = false;
}
catch (ScanDriverException e)
{
if (ScanProfile.WiaRetryOnFailure && e.InnerException is COMException comError &&
(uint)comError.ErrorCode == 0x80004005 && retryCount < MAX_RETRIES)
{
Thread.Sleep(1000);
retryCount += 1;
retry = true;
continue;
}
throw;
}
if (image != null)
{
source.Put(image);
}
} while (!CancelToken.IsCancellationRequested && (retry || !done && ScanProfile.PaperSource != ScanSource.Glass));
}
}
protected override IEnumerable <ScannedImage> ScanInternal()
{
using (var eventLoop = new WiaBackgroundEventLoop(ScanProfile, ScanDevice, threadFactory))
{
bool supportsFeeder = eventLoop.GetSync(wia => WiaApi.DeviceSupportsFeeder(wia.Device));
if (ScanProfile.PaperSource != ScanSource.Glass && !supportsFeeder)
{
throw new NoFeederSupportException();
}
bool supportsDuplex = eventLoop.GetSync(wia => WiaApi.DeviceSupportsDuplex(wia.Device));
if (ScanProfile.PaperSource == ScanSource.Duplex && !supportsDuplex)
{
throw new NoDuplexSupportException();
}
int pageNumber = 1;
int retryCount = 0;
bool retry = false;
bool cancel = false;
do
{
ScannedImage image;
try
{
image = TransferImage(eventLoop, pageNumber, out cancel);
pageNumber++;
Debug.WriteLine("Succeeded with retry count {0}", retryCount);
retryCount = 0;
retry = false;
}
catch (ScanDriverException e)
{
if (e.InnerException is COMException && (uint)((COMException)e.InnerException).ErrorCode == 0x80004005 && retryCount < 10)
{
Thread.Sleep(1000);
retryCount += 1;
Debug.WriteLine("Retrying {0}", retryCount);
retry = true;
continue;
}
throw;
}
catch (Exception e)
{
throw new ScanDriverUnknownException(e);
}
if (image != null)
{
yield return(image);
}
} while (retry || (!cancel && ScanProfile.PaperSource != ScanSource.Glass));
}
}
protected override IEnumerable <IScannedImage> ScanInternal()
{
using (var eventLoop = new WiaBackgroundEventLoop(ScanSettings, ScanDevice))
{
bool supportsFeeder = eventLoop.GetSync(wia => WiaApi.DeviceSupportsFeeder(wia.Device));
if (ScanSettings.PaperSource != ScanSource.Glass && !supportsFeeder)
{
throw new NoFeederSupportException();
}
int pageNumber = 1;
while (true)
{
bool feederReady = eventLoop.GetSync(wia => WiaApi.DeviceFeederReady(wia.Device));
if (ScanSettings.PaperSource != ScanSource.Glass && !feederReady)
{
if (pageNumber == 1)
{
throw new NoPagesException();
}
break;
}
IScannedImage image;
try
{
image = TransferImage(eventLoop, pageNumber++);
}
catch (ScanDriverException)
{
throw;
}
catch (Exception e)
{
throw new ScanDriverUnknownException(e);
}
if (image == null)
{
break;
}
yield return(image);
if (ScanSettings.PaperSource == ScanSource.Glass)
{
break;
}
}
}
}
protected override IEnumerable <ScannedImage> ScanInternal()
{
using (var eventLoop = new WiaBackgroundEventLoop(ScanProfile, ScanDevice, threadFactory))
{
bool supportsFeeder = eventLoop.GetSync(wia => WiaApi.DeviceSupportsFeeder(wia.Device));
if (ScanProfile.PaperSource != ScanSource.Glass && !supportsFeeder)
{
throw new NoFeederSupportException();
}
bool supportsDuplex = eventLoop.GetSync(wia => WiaApi.DeviceSupportsDuplex(wia.Device));
if (ScanProfile.PaperSource == ScanSource.Duplex && !supportsDuplex)
{
throw new NoDuplexSupportException();
}
int pageNumber = 1;
bool cancel;
do
{
ScannedImage image;
try
{
image = TransferImage(eventLoop, pageNumber++, out cancel);
}
catch (ScanDriverException)
{
throw;
}
catch (Exception e)
{
throw new ScanDriverUnknownException(e);
}
if (image != null)
{
yield return(image);
}
} while (!cancel && ScanProfile.PaperSource != ScanSource.Glass);
}
}
