/*.............................................................................
 * Project : SANE library for Plustek flatbed scanners.
 *.............................................................................
 */

/** @file plustek.h
 *  @brief Definitions for the backend.
 *
 * Based on Kazuhiro Sasayama previous
 * Work on plustek.[ch] file from the SANE package.<br>
 *
 * original code taken from sane-0.71<br>
 * Copyright (C) 1997 Hypercore Software Design, Ltd.<br>
 * Copyright (C) 2001-2003 Gerhard Jaeger <gerhard@gjaeger.de>
 *
 * History:
 * - 0.30 - initial version
 * - 0.31 - no changes
 * - 0.32 - no changes
 * - 0.33 - no changes
 * - 0.34 - moved some definitions and typedefs from plustek.c
 * - 0.35 - removed OPT_MODEL from options list
 *		  - added max_y to struct Plustek_Scan
 * - 0.36 - added reader_pid, pipe and bytes_read to struct Plustek_Scanner
 *		  - removed unused variables from struct Plustek_Scanner
 *        - moved fd from struct Plustek_Scanner to Plustek_Device
 *		  - added next members to struct Plustek_Scanner and Plustek_Device
 * - 0.37 - added max_x to struct Plustek_Device
 * - 0.38 - added caps to struct Plustek_Device
 *        - added exit code to struct Plustek_Scanner
 *        - removed dropout stuff
 * - 0.39 - PORTTYPE enum
 *        - added function pointers to control a scanner device
 *        (Parport and USB)
 * - 0.40 - added USB stuff
 * - 0.41 - added configuration stuff
 * - 0.42 - added custom gamma tables
 *        - changed usbId to static array
 *		  - added _MAX_ID_LEN
 * - 0.43 - no changes
 * - 0.44 - added flag initialized
 * - 0.45 - added readLine function
 * - 0.46 - flag initialized is now used as device index
 *        - added calFile to Plustek_Device
 *        - removed _OPT_HALFTONE
 * .
 * <hr>
 * This file is part of the SANE package.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 *
 * As a special exception, the authors of SANE give permission for
 * additional uses of the libraries contained in this release of SANE.
 *
 * The exception is that, if you link a SANE library with other files
 * to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License.  Your use of that executable is in no way restricted on
 * account of linking the SANE library code into it.
 *
 * This exception does not, however, invalidate any other reasons why
 * the executable file might be covered by the GNU General Public
 * License.
 *
 * If you submit changes to SANE to the maintainers to be included in
 * a subsequent release, you agree by submitting the changes that
 * those changes may be distributed with this exception intact.
 *
 * If you write modifications of your own for SANE, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 * <hr>
 */
#ifndef __PLUSTEK_H__
#define __PLUSTEK_H__

/************************ some definitions ***********************************/

#define MM_PER_INCH         25.4

#define PLUSTEK_CONFIG_FILE	"plustek.conf"

#ifndef PATH_MAX
# define PATH_MAX 1024
#endif

#define _MEASURE_BASE		300UL
#define _DEF_DPI		 	50

/** the default image size
 */
#define _DEFAULT_TLX  		0		/* 0..216 mm */
#define _DEFAULT_TLY  		0		/* 0..297 mm */
#define _DEFAULT_BRX		126		/* 0..216 mm*/
#define _DEFAULT_BRY		76.21	/* 0..297 mm */

#define _DEFAULT_TP_TLX  	3.5		/* 0..42.3 mm */
#define _DEFAULT_TP_TLY  	10.5	/* 0..43.1 mm */
#define _DEFAULT_TP_BRX		38.5	/* 0..42.3 mm */
#define _DEFAULT_TP_BRY		33.5	/* 0..43.1 mm */

#define _DEFAULT_NEG_TLX  	1.5		/* 0..38.9 mm */
#define _DEFAULT_NEG_TLY  	1.5		/* 0..29.6 mm */
#define _DEFAULT_NEG_BRX	37.5	/* 0..38.9 mm */
#define _DEFAULT_NEG_BRY	25.5	/* 0..29.6 mm */

/** image sizes for normal, transparent and negative modes
 */
#define _TPAPageWidth		500U
#define _TPAPageHeight		510U
#define _TPAMinDpi		    150
#define _TPAModeSupportMin	COLOR_TRUE24

#define _NegativePageWidth  460UL
#define _NegativePageHeight 350UL

#define _NORMAL_X		216.0
#define _NORMAL_Y		297.0
#define _TP_X			((double)_TPAPageWidth/300.0 * MM_PER_INCH)
#define _TP_Y			((double)_TPAPageHeight/300.0 * MM_PER_INCH)
#define _NEG_X			((double)_NegativePageWidth/300.0 * MM_PER_INCH)
#define _NEG_Y			((double)_NegativePageHeight/300.0 * MM_PER_INCH)

/** scan modes
 */
#define COLOR_BW     	0
#define COLOR_256GRAY	1
#define COLOR_GRAY16 	2
#define COLOR_TRUE24 	3
#define COLOR_TRUE48 	4

/** usb id buffer
 */
#define _MAX_ID_LEN	20


/**
 */
#define SFLAG_SCANNERDEV        0x00000002  /* is scannerdevice             */
#define SFLAG_FLATBED           0x00000004  /* is flatbed scanner           */

#define SFLAG_ADF		    	0x00000010  /* Automatic document feeder    */
#define SFLAG_TPA       	    0x00000080	/* has transparency	adapter     */
#define SFLAG_BUTTONOPT         0x00000100  /* has buttons                  */

#define SFLAG_CUSTOM_GAMMA		0x00000200  /* driver supports custom gamma */

/**
 */
#define SCANDEF_Transparency	    0x00000100	/* Scanning from transparency*/
#define SCANDEF_Negative	    	0x00000200	/* Scanning from negative    */
#define SCANDEF_QualityScan	    	0x00000400	/* Scanning in quality mode  */
#define SCANDEF_ContinuousScan      0x00001000
#define SCANDEF_TPA                 (SCANDEF_Transparency | SCANDEF_Negative)

#define SCANDEF_Adf                 0x00020000  /* Scan from ADF tray        */

/**
 */
#define SOURCE_Reflection	0
#define SOURCE_Transparency	1
#define SOURCE_Negative 	2
#define SOURCE_ADF          3

/** for Gamma tables
 */
#define _MAP_RED    0
#define _MAP_GREEN  1
#define _MAP_BLUE   2
#define _MAP_MASTER 3

/** generic error codes...
 */
#define _FIRST_ERR	-9000

#define _E_ALLOC            (_FIRST_ERR-1)  /**< error allocating memory    */
#define _E_INVALID          (_FIRST_ERR-2)  /**< invalid parameter detected */
#define _E_INTERNAL         (_FIRST_ERR-3)  /**< internal error             */
#define _E_ABORT            (_FIRST_ERR-4)  /**< operation aborted          */

#define _E_LAMP_NOT_IN_POS  (_FIRST_ERR-10)
#define _E_LAMP_NOT_STABLE  (_FIRST_ERR-11)
#define _E_NODATA           (_FIRST_ERR-12)
#define _E_BUFFER_TOO_SMALL (_FIRST_ERR-13)
#define _E_DATAREAD         (_FIRST_ERR-14)


/************************ some structures ************************************/

enum {
	OPT_NUM_OPTS = 0,
	OPT_MODE_GROUP,
	OPT_MODE,
	OPT_EXT_MODE,
	OPT_RESOLUTION,
	OPT_PREVIEW,
	OPT_GEOMETRY_GROUP,
	OPT_TL_X,
	OPT_TL_Y,
	OPT_BR_X,
	OPT_BR_Y,
	OPT_ENHANCEMENT_GROUP,
	OPT_BRIGHTNESS,
	OPT_CONTRAST,
	OPT_CUSTOM_GAMMA,
	OPT_GAMMA_VECTOR,
	OPT_GAMMA_VECTOR_R,
	OPT_GAMMA_VECTOR_G,
	OPT_GAMMA_VECTOR_B,
	NUM_OPTIONS
};

/**
 */
typedef struct {
	int x;
	int y;
} OffsDef, *pOffsDef;

/** for adjusting the scanner settings
 */
typedef struct {
	int     lampOff;
	int     lampOffOnEnd;
	int     warmup;
	int     enableTpa;
	int     skipCalibration;
	int     skipFine;
	int     skipFineWhite;
	int     invertNegatives;
	int     cacheCalData;
	int     altCalibrate;  /* force use of the alternate canoscan
                                  autocal; perhaps other Canon
                                  scanners require the alternate
                                  autocalibration as well */
	int rgain;
	int ggain;
	int bgain;

	OffsDef pos; 	/* for adjusting normal scan area       */
	OffsDef tpa; 	/* for adjusting transparency scan area */
	OffsDef neg; 	/* for adjusting negative scan area     */

	int     posShadingY;
	int     tpaShadingY;
	int     negShadingY;

	/* for adjusting the default gamma settings */
	double  rgamma;
	double  ggamma;
	double  bgamma;

	
	double  graygamma;

} AdjDef, *pAdjDef;

typedef struct {
	unsigned short x;
    unsigned short y;
    unsigned short cx;
    unsigned short cy;
} CropRect, *pCropRect;

typedef struct image {
	unsigned long dwFlag;
	CropRect      crArea;
	XY            xyDpi;
	unsigned short	wDataType;
} ImgDef, *pImgDef;

typedef struct {
	unsigned long dwPixelsPerLine;
	unsigned long dwBytesPerLine;
	unsigned long dwLinesPerArea;
	ImgDef        ImgDef;
} CropInfo, *pCropInfo;

typedef struct {
	ImgDef ImgDef;
	short  siBrightness;
	short  siContrast;
} ScanInfo, *pScanInfo;

typedef struct {
    unsigned long	dwFlag;
    unsigned short	wMaxExtentX;	/**< scanarea width					*/
    unsigned short	wMaxExtentY;	/**< scanarea height				*/
} ScannerCaps, *pScannerCaps;

/** for defining the scanmodes
 */
typedef const struct mode_param
{
	int color;
	int depth;
	int scanmode;
} ModeParam, *pModeParam;

typedef struct Plustek_Device
{
	SANE_Int               initialized;      /* device already initialized?  */
	struct Plustek_Device *next;             /* pointer to next dev in list  */
	int 				   fd;				 /* device handle                */
    char                  *name;             /* (to avoid compiler warnings!)*/
	char                  *calFile;          /* for saving calibration data  */
    SANE_Device 		   sane;             /* info struct                  */
	SANE_Int			   max_x;            /* max XY-extension of the scan-*/
	SANE_Int			   max_y;            /* area                         */
    SANE_Range 			   dpi_range;        /* resolution range             */
    SANE_Range 			   x_range;          /* x-range of the scan-area     */
    SANE_Range 			   y_range;          /* y-range of the scan-area     */
    SANE_Int  		 	  *res_list;         /* to hold the available phys.  */
    SANE_Int 			   res_list_size;    /* resolution values            */
    ScannerCaps            caps;             /* caps reported by the driver  */
	AdjDef                 adj;	             /* for driver adjustment        */
	
    /**************************** USB-stuff **********************************/
    char                   usbId[_MAX_ID_LEN];/* to keep Vendor and product  */
                                             /* ID string (from conf) file   */
    struct ScanDef         scanning;         /* here we hold all stuff for   */
                                             /* the USB-scanner              */
	struct DeviceDef       usbDev;
#ifdef HAVE_SETITIMER
	struct itimerval       saveSettings;     /* for lamp timer               */
#endif
    /*
     * each device we support may need other access functions...
     */
    int  (*open)       ( const char*, void* );
    int  (*close)      ( struct Plustek_Device* );
    void (*shutdown)   ( struct Plustek_Device* );
    int  (*getCaps)    ( struct Plustek_Device* );
    int  (*getCropInfo)( struct Plustek_Device*, pCropInfo  );
    int  (*setScanEnv) ( struct Plustek_Device*, pScanInfo  );
    int  (*setMap)     ( struct Plustek_Device*, SANE_Word*,
												 SANE_Word, SANE_Word );
    int  (*startScan)  ( struct Plustek_Device* );
    int  (*stopScan)   ( struct Plustek_Device*, int* );
    int  (*prepare)    ( struct Plustek_Device*, SANE_Byte* );
    int  (*readLine)   ( struct Plustek_Device* );

} Plustek_Device, *pPlustek_Device;

#ifndef SANE_OPTION
/* for compatibility with older versions */
typedef union
{
	SANE_Word w;
	SANE_Word *wa;		/* word array */
	SANE_String s;
} Option_Value;
#endif

typedef struct Plustek_Scanner
{
	struct Plustek_Scanner *next;
	pid_t                   reader_pid;     /* process id of reader          */
	SANE_Status             exit_code;      /* status of the reader process  */
	int                     r_pipe;         /* pipe to reader process        */
	int                     w_pipe;         /* pipe from reader process      */
	unsigned long           bytes_read;     /* number of bytes currently read*/
	pPlustek_Device         hw;             /* pointer to current device     */
	Option_Value            val[NUM_OPTIONS];
	SANE_Byte              *buf;            /* the image buffer              */
	SANE_Bool               scanning;       /* TRUE during scan-process      */
	SANE_Parameters         params;         /* for keeping the parameter     */

    /************************** gamma tables *********************************/

	SANE_Word   gamma_table[4][4096];
	SANE_Range  gamma_range;
	int         gamma_length;

	SANE_Option_Descriptor opt[NUM_OPTIONS];

} Plustek_Scanner, *pPlustek_Scanner;


/** for collecting configuration info...
 */
typedef struct {
	
	char     devName[PATH_MAX];
	char     usbId[_MAX_ID_LEN];	

	/* contains the stuff to adjust... */
	AdjDef   adj;

} CnfDef, *pCnfDef;

#endif	/* guard __PLUSTEK_H__ */

/* END PLUSTEK.H.............................................................*/