// OVERLOADED function to retrieve the results from the service process and load into 'Results'
// Remember the character numbers returned refer to the Windows character set.
private static bool GetResults(int JobNo, ref TOcrResultStructures.TOcrResults Results, ref int error)
{
int ResultsInf = 0; // number of bytes needed for results
byte[] Bytes;
int Offset;
bool RetStatus = false;
GCHandle BytesGC;
IntPtr AddrOfItemBytes;
Results.Hdr.NumItems = 0;
if (TOCRGetJobResults(JobNo, ref ResultsInf, IntPtr.Zero) == TOCR_OK)
{
if (ResultsInf > 0)
{
Bytes = new Byte[ResultsInf - 1];
// pin the Bytes array so that TOCRGetJobResults can write to it
BytesGC = GCHandle.Alloc(Bytes, GCHandleType.Pinned);
if (TOCRGetJobResults(JobNo, ref ResultsInf, BytesGC.AddrOfPinnedObject()) == TOCR_OK)
{
Results.Hdr = ((TOcrResultStructures.TOcrResultsHeader)(Marshal.PtrToStructure(BytesGC.AddrOfPinnedObject(), typeof(TOcrResultStructures.TOcrResultsHeader))));
if (Results.Hdr.NumItems > 0)
{
Results.Item = new TOcrResultStructures.TOcrResultsItem[Results.Hdr.NumItems];
Offset = Marshal.SizeOf(typeof(TOcrResultStructures.TOcrResultsHeader));
for (int ItemNo = 0; ItemNo <= Results.Hdr.NumItems - 1; ItemNo++)
{
AddrOfItemBytes = Marshal.UnsafeAddrOfPinnedArrayElement(Bytes, Offset);
Results.Item[ItemNo] = ((TOcrResultStructures.TOcrResultsItem)(Marshal.PtrToStructure(AddrOfItemBytes, typeof(TOcrResultStructures.TOcrResultsItem))));
Offset = Offset + Marshal.SizeOf(typeof(TOcrResultStructures.TOcrResultsItem));
}
}
RetStatus = true;
// Double check results
if (Results.Hdr.StructId == 0)
{
if (Results.Hdr.NumItems > 0)
{
if (Results.Item[0].StructId != 0)
{
error = -1;//ResultStructureError;
Results.Hdr.NumItems = 0;
RetStatus = false;
}
}
}
else
{
error = -2;//ResultHeaderStructureError;
Results.Hdr.NumItems = 0;
RetStatus = false;
}
}
BytesGC.Free();
}
}
return(RetStatus);
}
public TOcrResultStructures.TOcrResults Ocr(string imgFile)
{
int error = 0;
TOcrResultStructures.TOcrResults Results = new TOcrResultStructures.TOcrResults();
JobInfo2.InputFile = imgFile;
JobInfo2.JobType = TOCRJOBTYPE_TIFFFILE;
if (!OCRWait(JobNo, JobInfo2, ref error))
{
throw new TransymException("Unknown Transym Error. Engine did not respond. Transym error code: " + error);
}
if (!GetResults(JobNo, ref Results, ref error))
{
throw new TransymException("Transym Error. Could not get result. Transym error code: " + error);
}
if (error != 0)
{
throw new TransymException("Could not ocr stream. Transym error code: " + error);
}
return(Results);
}
// Demonstrates how to OCR an image using a memory mapped file created here
public TOcrResultStructures.TOcrResults OcrByStream(Stream imgStream)
{
var status = TOCRInitialise(ref JobNo);
if (status != TOCR_OK)
{
throw new TransymException("Transym could not be started. Transym error code: " + status);
}
try
{
int error = 0;
Bitmap BMP;
TOcrResultStructures.TOcrResults Results = new TOcrResultStructures.TOcrResults();
JobInfo2.JobType = TOCRJOBTYPE_MMFILEHANDLE;
IntPtr MMFhandle = IntPtr.Zero;
imgStream.Seek(0, SeekOrigin.Begin);
BMP = new Bitmap(imgStream);
MMFhandle = ConvertBitmapToMMF(BMP, true, true);
if (MMFhandle.Equals(IntPtr.Zero))
{
return(Results);
}
try
{
TOCRSetConfig(TOCRCONFIG_DEFAULTJOB, TOCRCONFIG_DLL_ERRORMODE, TOCRERRORMODE_MSGBOX);
JobInfo2.hMMF = MMFhandle;
if (!OCRWait(JobNo, JobInfo2, ref error))
{
throw new TransymException("Unknown Transym Error. Engine did not respond. Transym error code: " + error);
}
if (!GetResults(JobNo, ref Results, ref error))
{
throw new TransymException("Transym Error. Could not get result. Transym error code: " + error);
}
if (error != 0)
{
throw new TransymException("Could not ocr stream. Transym error code: " + error);
}
return(Results);
}
finally
{
CloseHandle(MMFhandle);
}
}
catch (TransymException)
{
throw;
}
catch (Exception e)
{
throw new TransymException("Unknown Transym Error", e);
}
finally
{
Stop();
var task = Task.Factory.StartNew(() => { Stop(); });
if (!task.Wait(5000))
{
throw new TransymException("Timedout trying to process shutdown transym");
}
}
} // Example4()
