Problem using DG_CONTROL / DAT_CUSTOMDSDATA / MSG_SET

[Rikr2]

Hello,
I’m developing an application that uses TWAIN (APP and DSM TWAIN 2.0 compliant) for scanning. This application allows users to set/get the current configuration of each device using DAT_CUSTOMDSDATA. When I get the CustomData and then set the same exported file, no error occurs and yet the values defined in the CustomData remain unchanged. I test the exported CustomData file in EZTWAIN tool and it works perfectly, so it must be an error in the set method. I’m using for testing the escanner Fujitsu fi-60f (DS TWAIN 1.0 compliant). Below I show the code i use for set.

// pItem contain the customdata loaded directly from disk, pLength contain the length of pItem.

bool setCurrentCAP_CUSTOMDSDATA( uint8_t * pItem , uint32_t pLength )

{

bool result = false;

// Check if twain is in state 4.

if( TWAIN_state == TWAIN_STATE_4 )

{

// check that is supported CAP_CUSTOMDSDATA and CAP_ENABLEDSUIONL.

TW_CAPABILITY customDataCAP = queryCAP_CUSTOMDSDATA();

TW_CAPABILITY enableDsUiOnlyCAP = queryCAP_ENABLEDSUIONLY();

if( customDataCAP . hContainer && enableDsUiOnlyCAP . hContainer )

{

// Check if CAP_CUSTOMDSDATA and CAP_ENABLEDSUIONL values are true.

pTW_ONEVALUE customDataValuePtr = pTW_ONEVALUE( GlobalLock( customDataCAP . hContainer ) );

pTW_ONEVALUE enableDsUiOnlyValuePtr = pTW_ONEVALUE( GlobalLock( enableDsUiOnlyCAP . hContainer ) );

if( TW_BOOL( customDataValuePtr -> Item ) != FALSE && TW_BOOL( enableDsUiOnlyValuePtr -> Item ) != FALSE )

{

if( pItem && pLength > 0 )

{

pTW_CUSTOMDSDATA customData = getCurrentCAP_CUSTOMDSDATA();

if(customData && customData->hData && customData->InfoLength > 0)

{

customData->hData = GlobalAlloc( pLength );

memcpy( customData->hData , pItem,pLength );

customData->InfoLength = pLength;

// This function call ( *_DSM_EntryPtr )( AppIdPtr , SourceIdPtr , DG_CONTROL , DAT_CUSTOMDSDATA , MSG_SET, customData );

TW_UINT16 setCapabilityResult = getDSEntry( DG_CONTROL , DAT_CUSTOMDSDATA , MSG_SET , customData );

if( setCapabilityResult == TWRC_SUCCESS )

{

result = true;

}

}

}

}

GlobalUnlock( customDataCAP . hContainer );

GlobalUnlock( enableDsUiOnlyCAP . hContainer );

}

}

return result;

}

Thanks

[MarkM]

If you try the same thing with a Kodak Document Imaging scanner (running in simulation mode is fine for the test, an i5200 would serve well), you can see if the code works, and if not, I can probably offer some advice. Otherwise your best bet is to contact the vendor directly and see what help they can offer…

[Author]

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