#pragma once

#ifndef __TTWAINP_H__

#define __TTWAINP_H__

#include "ttwain.h"

#ifdef TTWAINLIB_MAIN

#define EXTERN

#else

#define EXTERN extern

#endif

#ifdef __cplusplus

extern "C" {

#endif

typedef enum TWAINSTATE {

  TWAIN_PRESESSION = 1, /* source manager not loaded  */

  TWAIN_SM_LOADED,      /* source manager loaded      */

  TWAIN_SM_OPEN,        /* source manager open	      */

  TWAIN_SOURCE_OPEN,    /* source open but not enabled*/

  TWAIN_SOURCE_ENABLED, /* source enabled to acquire  */

  TWAIN_TRANSFER_READY, /* image ready to transfer    */

  TWAIN_TRANSFERRING    /* image in transit	      */

} TWAINSTATE;

#ifdef _WIN32

#ifdef x64

#define DSM_FILENAME "TWAINDSM.DLL"

#else

#define DSM_FILENAME "TWAIN_32.DLL"

#endif

#define DSM_ENTRYPOINT "DSM_Entry"

#else

#define DSM_FILENAME ""

#define DSM_ENTRYPOINT ""

#endif

struct TRANSFER_INFO {

  TTWAIN_TRANSFER_MECH transferMech; /*current transfer mechanism      */

  TTWAIN_USAGE_MODE usageMode;

  /*used by buffered memory tranfer */

  unsigned char *memoryBuffer;

  unsigned long memorySize;

  /*used by native tranfer          */

  void *hDib;

  /*common to all the transfer mode */

  int preferredLx;

  int preferredLy;

  int multiTransfer;

  int nextImageNeedsToBeInverted;

  int lastTransferWasOk;

  TW_PENDINGXFERS pendingXfers;

  int oneAtLeast;

};

struct CALLBACKS {

  TTWAIN_ONDONE_CB *onDoneCb;

  void *onDoneArg;

  TTWAIN_ONERROR_CB *onErrorCb;

  void *onErrorArg;

};

struct _TTWAIN_DATA__ {

  /*HANDLE*/

  DSMENTRYPROC DSM_Entry; /* entry point of Data Source Manager(TWAIN.DLL)*/

  TW_INT32 hwnd32SM;      /* window handle              */

  /*IDENTITY*/

  TW_IDENTITY sourceId;     /* source identity structure  */

  TW_IDENTITY appId;        /* Application Ident. for DS  */

  TW_USERINTERFACE twainUI; /*                            */

  int initDone;

  TWAINAVAILABLE twainAvailable;

  TWAINSTATE twainState; /* the current twain state    */

  struct TRANSFER_INFO transferInfo;

  struct CALLBACKS callback;

  TW_ARRAY *supportedCaps; /* all the (exported)supported capabilities */

  int isSupportedCapsSupported;

  int breakModalLoop;

  int UIStatus; /* Hide or Show UserInterface */

  int modalStatus;

  TW_INT16 resultCode; /* result code for LAST error     */

  TUINT32 ErrRC; /* result & condition code        */

  TUINT32 ErrCC; /* for LAST RECORDED error        */

};

EXTERN struct _TTWAIN_DATA__ TTwainData;

EXTERN int TTWAIN_InitVar(void);

#ifdef __cplusplus

}

#endif

#endif