#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