Example 14: Job and Batch Processnig

Example:  Acquire images using device that supports job control and batch processing.

#include "cdtwain.h"  // CDTwain

#include <iostream>

#include <algorithm>  // for std::find

using namespace DTWAIN;

using namespace std; // for <iostream>

int main( )

{

  // Initialize DTWAIN - return if initialization does not work

  DTwainInterface TI;

  if ( !TI.IsValid( ) )

      return 0;

  // Declare a Source and assign the TWAIN source to it

  DTwainSource Source = DTwainSource::Select( );

  if ( !Source.IsValid( ) )

     return 0;

 if ( !Source.IsJobControlSupported( ) )

 {

    cout << "Device does not support job control.  Exiting";

    return 0;

 }

 // get all of the supported job control types

 DTwainLongArray AllJobControls;

 Source.EnumJobControls( AllJobControls );

 // we would like to exclude the job separator page when scanning.  Check if it's in the list of supported types

 if ( find(AllJobControls.begin( ), AllJobControls.end( ), DTWAIN_JC_JSXC ) != AllJobControls.end( ) )

    Source.SetJobControl( DTWAIN_JC_JSXC );

 else

 // include the job separator page.

 if ( find(AllJobControls.begin( ), AllJobControls.end( ), DTWAIN_JC_JSXC ) != AllJobControls.end( ) )

    Source.SetJobControl( DTWAIN_JC_JSIC );

 else

 {

      cout << "Could not find appropriate job control type";

      return 0;

 }

 // Acquire to a multipage Group 4 TIFF file.  Base file name is JOB0000

 DTwainAcquirer Acquirer(Source);

 Acquirer.SetFileNumberIncrement( 1 ).  // auto increment the number field in the base file name.

              SetUIMode( false ).   // no user interface

              SetMultiPageFileMode( ).  // scan to a multipage file, not individual files

              SetColorType(COLORTYPE_BW).  // make sure pixel level is 1-bit (black/white) for group 4 TIFF files.

              EnableFeeder( true ).   // enable the document feeder

              Acquire("JOB0000.TIF", FILETYPE_TIFFG4); // start the acquisition

}

The code above will create multipage Group4-TIFF files called JOB0000.TIF, JOB0001.TIF, JOB0002.TIF, etc. that will contain the pages of each batch job that was acquired.  The separator page determines the start of a new job.  Note that the device must support job/batch processing using TWAIN.