196 lines
6.1 KiB
C++
196 lines
6.1 KiB
C++
/***************************************************************************
|
|
* Copyright © 2007 TWAIN Working Group:
|
|
* Adobe Systems Incorporated, AnyDoc Software Inc., Eastman Kodak Company,
|
|
* Fujitsu Computer Products of America, JFL Peripheral Solutions Inc.,
|
|
* Ricoh Corporation, and Xerox Corporation.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of the TWAIN Working Group nor the
|
|
* names of its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY TWAIN Working Group ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL TWAIN Working Group BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
***************************************************************************/
|
|
|
|
/**
|
|
* @file CTWAINDS_Sample1.cpp
|
|
* Reveals the main entry point for the DSM
|
|
* @author TWAIN Working Group
|
|
* @date April 2007
|
|
*/
|
|
#include "stdafx.h"
|
|
#include "CTWAINDS_Sample1.h"
|
|
#include <list>
|
|
#include "twain.h"
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// Globals
|
|
/**
|
|
* gloabal pointer of the Data Source, for access to the main DS_Entry.
|
|
*/
|
|
typedef struct _DS_inst
|
|
{
|
|
TW_IDENTITY AppId;
|
|
CTWAINDS_Base *pDS;
|
|
}DS_inst;
|
|
|
|
typedef list<DS_inst> lstDS;
|
|
lstDS g_lstDS;
|
|
|
|
#ifdef TWH_CMP_MSC
|
|
/**
|
|
* gloadbal Windows Instance handle for the DSM DLL...
|
|
*/
|
|
HINSTANCE g_hinstance = 0;
|
|
#endif
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// This is the main entry point. This function is dlsym'd by the DSM.
|
|
|
|
#ifdef TWH_CMP_MSC
|
|
TW_UINT16 FAR PASCAL
|
|
#else
|
|
FAR PASCAL TW_UINT16
|
|
#endif
|
|
DS_Entry( pTW_IDENTITY _pOrigin,
|
|
TW_UINT32 _DG,
|
|
TW_UINT16 _DAT,
|
|
TW_UINT16 _MSG,
|
|
TW_MEMREF _pData)
|
|
{
|
|
AFX_MANAGE_STATE(AfxGetStaticModuleState());
|
|
CTWAINDS_Base* pTWAINLayer = 0;
|
|
if(_pOrigin)
|
|
{
|
|
lstDS::iterator llIter=g_lstDS.begin();
|
|
for(;llIter!=g_lstDS.end();llIter++)
|
|
{
|
|
if((*llIter).AppId.Id==_pOrigin->Id)
|
|
{
|
|
pTWAINLayer=(*llIter).pDS;
|
|
}
|
|
}
|
|
}
|
|
// Curently we are not open
|
|
if( 0 == pTWAINLayer )
|
|
{
|
|
// Special case DSM can request to get identity information about
|
|
// DS before it is open. In this special case, where the DS is not
|
|
// open, we return this static Idenity.
|
|
if( DG_CONTROL == _DG && DAT_IDENTITY == _DAT && MSG_GET == _MSG )
|
|
{
|
|
// Copy the ID assigned by the DSM eventhough the spec states
|
|
// that the id will not be assigned until MSG_OPENDS
|
|
CTWAINDS_Base::m_TheIdentity.Id = ((pTW_IDENTITY)_pData)->Id;
|
|
memcpy( _pData, &CTWAINDS_Base::m_TheIdentity, sizeof(CTWAINDS_Base::m_TheIdentity) );
|
|
|
|
return TWRC_SUCCESS;
|
|
}
|
|
|
|
// The DS is not open. If we get a request to close DS do not open
|
|
// just to close, instead return that it is success closed.
|
|
if( DG_CONTROL == _DG && DAT_IDENTITY == _DAT && MSG_CLOSEDS == _MSG )
|
|
{
|
|
return TWRC_SUCCESS;
|
|
}
|
|
|
|
// Open the DS
|
|
pTWAINLayer = new CTWAINDS_FreeImage(*_pOrigin);
|
|
if( NULL == pTWAINLayer
|
|
|| TWRC_SUCCESS != pTWAINLayer->Initialize())
|
|
{
|
|
// Failed to create the DS
|
|
//setConditionCode(TWCC_LOWMEMORY);
|
|
if(pTWAINLayer)
|
|
{
|
|
// Created but could not Initialize
|
|
delete pTWAINLayer;
|
|
}
|
|
return TWRC_FAILURE;
|
|
}
|
|
DS_inst _DS;
|
|
_DS.pDS = pTWAINLayer;
|
|
_DS.AppId = *_pOrigin;
|
|
g_lstDS.push_back(_DS);
|
|
|
|
}
|
|
|
|
// If we were not open before, we are now, so continue with the TWAIN call
|
|
TW_INT16 result = pTWAINLayer->DS_Entry(_pOrigin, _DG, _DAT, _MSG, _pData);
|
|
|
|
/**
|
|
* Special case - free memory if closing DS
|
|
* @todo keep track of what apps are connecting to the ds and only
|
|
* delete when count goes down to 0
|
|
*/
|
|
if( TWRC_SUCCESS == result &&
|
|
DG_CONTROL == _DG && DAT_IDENTITY == _DAT && MSG_CLOSEDS == _MSG &&
|
|
NULL != pTWAINLayer )
|
|
{
|
|
lstDS::iterator llIter=g_lstDS.begin();
|
|
for(;llIter!=g_lstDS.end();)
|
|
{
|
|
if((*llIter).AppId.Id==_pOrigin->Id)
|
|
{
|
|
delete (*llIter).pDS;
|
|
llIter = g_lstDS.erase(llIter);
|
|
continue;
|
|
}
|
|
llIter++;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
//#ifdef TWH_CMP_MSC
|
|
///**
|
|
//* DllMain is only needed for Windows, and it's only needed to collect
|
|
//* our instance handle, which is also our module handle. Don't ever
|
|
//* put anything else in here, not even logging messages. It just isn't
|
|
//* safe...
|
|
//*/
|
|
//BOOL WINAPI DllMain(HINSTANCE _hmodule,
|
|
// DWORD _dwReasonCalled,
|
|
// LPVOID)
|
|
//{
|
|
// switch (_dwReasonCalled)
|
|
// {
|
|
// case DLL_THREAD_ATTACH:
|
|
// case DLL_THREAD_DETACH:
|
|
// break;
|
|
// case DLL_PROCESS_ATTACH:
|
|
// g_hinstance = _hmodule;
|
|
// break;
|
|
// case DLL_PROCESS_DETACH:
|
|
// unLoadDSMLib();
|
|
// g_hinstance = 0;
|
|
// break;
|
|
// }
|
|
// return(TRUE);
|
|
//}
|
|
//#elif (TWNDS_CMP == TWNDS_CMP_GNUGPP)
|
|
// // Nothing for us to do...
|
|
//#else
|
|
// #error Sorry, we do not recognize this system...
|
|
//#endif
|
|
|