/*	tiffio.h	1.27	90/05/22	*/

/*
 * Copyright (c) 1988, 1990 by Sam Leffler.
 * All rights reserved.
 *
 * This file is provided for unrestricted use provided that this
 * legend is included on all tape media and as a part of the
 * software program in whole or part.  Users may copy, modify or
 * distribute this file at will.
 */

#ifndef _TIFFIO_
#define	_TIFFIO_

/*
 * TIFF I/O Library Definitions.
 */
#include "tiffcompat.h"
#include "tiff.h"

/*
 * Internal format of a TIFF directory entry.
 */
typedef	struct {
	u_short	td_subfiletype;
	u_short	td_imagewidth, td_imagelength;
	u_short	td_bitspersample;
	u_short	td_compression;
	u_short	td_photometric;
	u_short	td_threshholding;
	u_short	td_fillorder;
	u_short	td_orientation;
	u_short	td_samplesperpixel;
	u_short	td_predictor;
	u_long	td_rowsperstrip;
	u_long	td_minsamplevalue, td_maxsamplevalue;	/* maybe float? */
	float	td_xresolution, td_yresolution;
	u_short	td_resolutionunit;
	u_short	td_planarconfig;
	float	td_xposition, td_yposition;
	u_long	td_group3options;
	u_long	td_group4options;
	u_short	td_pagenumber[2];
	u_short	td_grayresponseunit;
	u_short	td_colorresponseunit;
	u_short	td_matteing;
	u_short	td_cleanfaxdata;
	u_short	td_badfaxrun;
	u_long	td_badfaxlines;
	u_short	*td_grayresponsecurve;	/* u_short for now (maybe float?) */
	u_short	*td_redresponsecurve;	/* u_short for now (maybe float?) */
	u_short	*td_greenresponsecurve;	/* u_short for now (maybe float?) */
	u_short	*td_blueresponsecurve;	/* u_short for now (maybe float?) */
	u_short	*td_redcolormap;
	u_short	*td_greencolormap;
	u_short	*td_bluecolormap;
#ifdef notdef
/* not yet used/supported */
	float	td_whitepoint[2];
	float	td_primarychromaticities[6];
#endif
	char	*td_documentname;
	char	*td_artist;
	char	*td_datetime;
	char	*td_hostcomputer;
	char	*td_imagedescription;
	char	*td_make;
	char	*td_model;
	char	*td_software;
	char	*td_pagename;
	u_long	td_fieldsset[2];	/* bit vector of fields that are set */
	u_long	td_stripsperimage;
	u_long	td_nstrips;		/* size of offset & bytecount arrays */
	u_long	*td_stripoffset;
	u_long	*td_stripbytecount;
} TIFFDirectory;

/*
 * Field flags used to indicate fields that have
 * been set in a directory, and to reference fields
 * when manipulating a directory.
 */
/* multi-entry fields */
#define	FIELD_IMAGEDIMENSIONS		0
#define	FIELD_CELLDIMENSIONS		1		/* XXX */
#define	FIELD_RESOLUTION		2
#define	FIELD_POSITION			3
/* single-entry fields */
#define	FIELD_SUBFILETYPE		4
#define	FIELD_BITSPERSAMPLE		5
#define	FIELD_COMPRESSION		6
#define	FIELD_PHOTOMETRIC		7
#define	FIELD_THRESHHOLDING		8
#define	FIELD_FILLORDER			9		/* XXX */
#define	FIELD_DOCUMENTNAME		10
#define	FIELD_IMAGEDESCRIPTION		11
#define	FIELD_MAKE			12
#define	FIELD_MODEL			13
#define	FIELD_ORIENTATION		14
#define	FIELD_SAMPLESPERPIXEL		15
#define	FIELD_ROWSPERSTRIP		16
#define	FIELD_MINSAMPLEVALUE		17
#define	FIELD_MAXSAMPLEVALUE		18
#define	FIELD_PLANARCONFIG		19
#define	FIELD_PAGENAME			20
#define	FIELD_GRAYRESPONSEUNIT		21
#define	FIELD_GRAYRESPONSECURVE		22
#define	FIELD_GROUP3OPTIONS		23
#define	FIELD_GROUP4OPTIONS		24
#define	FIELD_RESOLUTIONUNIT		25
#define	FIELD_PAGENUMBER		26
#define	FIELD_COLORRESPONSEUNIT		27
#define	FIELD_COLORRESPONSECURVE	28
#define	FIELD_STRIPBYTECOUNTS		29
#define	FIELD_STRIPOFFSETS		31
#define	FIELD_COLORMAP			32
#define FIELD_PREDICTOR			33
#define FIELD_ARTIST			34
#define FIELD_DATETIME			35
#define FIELD_HOSTCOMPUTER		36
#define FIELD_SOFTWARE			37
#define	FIELD_MATTEING			38
#define	FIELD_BADFAXLINES		39
#define	FIELD_CLEANFAXDATA		40
#define	FIELD_BADFAXRUN			41
#define	FIELD_LAST			FIELD_BADFAXRUN

#define	TIFFFieldSet(tif, field) \
    ((tif)->tif_dir.td_fieldsset[field/32] & (1L<<(field&0x1f)))
#define	TIFFSetFieldBit(tif, field) \
    ((tif)->tif_dir.td_fieldsset[field/32] |= (1L<<(field&0x1f)))

typedef	struct {
	char	*tif_name;		/* name of open file */
	short	tif_fd;			/* open file descriptor */
	short	tif_mode;		/* open mode (O_*) */
	char	tif_fillorder;		/* natural bit fill order for machine */
	char	tif_options;		/* compression-specific options */
	short	tif_flags;
#define	TIFF_DIRTYHEADER	0x1	/* header must be written on close */
#define	TIFF_DIRTYDIRECT	0x2	/* current directory must be written */
#define	TIFF_BUFFERSETUP	0x4	/* data buffers setup */
#define	TIFF_BEENWRITING	0x8	/* written 1+ scanlines to file */
#define	TIFF_SWAB		0x10	/* byte swap file information */
#define	TIFF_NOBITREV		0x20	/* inhibit bit reversal logic */
	long	tif_diroff;		/* file offset of current directory */
	long	tif_nextdiroff;		/* file offset of following directory */
	TIFFDirectory tif_dir;		/* internal rep of current directory */
	TIFFHeader tif_header;		/* file's header block */
	int	tif_typeshift[6];	/* data type shift counts */
	long	tif_typemask[6];	/* data type masks */
	long	tif_row;		/* current scanline */
	int	tif_curstrip;		/* current strip for read/write */
	long	tif_curoff;		/* current offset for read/write */
/* compression scheme hooks */
	int	(*tif_stripdecode)();	/* strip decoding routine (pre) */
	int	(*tif_decoderow)();	/* scanline decoding routine */
	int	(*tif_stripencode)();	/* strip encoding routine (pre) */
	int	(*tif_encoderow)();	/* scanline encoding routine */
	int	(*tif_encodestrip)();	/* strip encoding routine (post) */
	int	(*tif_close)();		/* cleanup-on-close routine */
	int	(*tif_seek)();		/* position within a strip routine */
	int	(*tif_cleanup)();	/* routine called to cleanup state */
	char	*tif_data;		/* compression scheme private data */
/* input/output buffering */
	int	tif_scanlinesize;	/* # of bytes in a scanline */
	char	*tif_rawdata;		/* raw data buffer */
	long	tif_rawdatasize;	/* # of bytes in raw data buffer */
	char	*tif_rawcp;		/* current spot in raw buffer */
	long	tif_rawcc;		/* bytes unread from raw buffer */
} TIFF;

/* generic option bit names */
#define	TIFF_OPT0	0x1
#define	TIFF_OPT1	0x2
#define	TIFF_OPT2	0x4
#define	TIFF_OPT3	0x8
#define	TIFF_OPT4	0x10
#define	TIFF_OPT5	0x20
#define	TIFF_OPT6	0x40
#define	TIFF_OPT7	0x80

#ifndef NULL
#define	NULL	0
#endif

extern u_char TIFFBitRevTable[256];
extern u_char TIFFNoBitRevTable[256];

#if defined(c_plusplus) || defined(__cplusplus) || defined(__STDC__) || USE_PROTOTYPES
#if defined(__cplusplus)
extern "C" {
#endif
extern	void TIFFClose(TIFF*);
extern	int TIFFFlush(TIFF*);
extern	int TIFFFlushData(TIFF*);
extern	int TIFFGetField(TIFF*, int, ...);
extern	int TIFFReadDirectory(TIFF*);
extern	int TIFFScanlineSize(TIFF*);
extern	int TIFFSetDirectory(TIFF*, int);
extern	int TIFFSetField(TIFF*, int, ...);
extern	int TIFFWriteDirectory(TIFF *);
#if defined(c_plusplus) || defined(__cplusplus)
extern	TIFF* TIFFOpen(const char*, const char*);
extern	void TIFFError(const char*, const char*, ...);
extern	void TIFFWarning(const char*, const char*, ...);
extern	void TIFFPrintDirectory(TIFF*, FILE*, int = 0, int = 0, int = 0);
extern	int TIFFReadScanline(TIFF*, u_char*, u_int, u_int = 0);
extern	int TIFFWriteScanline(TIFF*, u_char*, u_int, u_int = 0);
#else
extern	TIFF* TIFFOpen(char*, char*);
extern	void TIFFError(char*, char*, ...);
extern	void TIFFWarning(char*, char*, ...);
extern	void TIFFPrintDirectory(TIFF*, FILE*, int, int, int);
extern	int TIFFReadScanline(TIFF*, u_char*, u_int, u_int);
extern	int TIFFWriteScanline(TIFF*, u_char*, u_int, u_int);
#endif
extern	int TIFFReadEncodedStrip(TIFF*, u_int, u_char *, u_int);
extern	int TIFFReadRawStrip(TIFF*, u_int, u_char *, u_int);
extern	int TIFFWriteEncodedStrip(TIFF*, u_int, u_char *, u_int);
extern	int TIFFWriteRawStrip(TIFF*, u_int, u_char *, u_int);
#if defined(__cplusplus)
}
#endif
#else
extern	void TIFFClose();
extern	TIFF *TIFFOpen();
extern	void TIFFError();
extern	int TIFFFlush();
extern	int TIFFFlushData();
extern	int TIFFGetField();
extern	void TIFFPrintDirectory();
extern	int TIFFReadDirectory();
extern	int TIFFReadScanline();
extern	int TIFFScanlineSize();
extern	int TIFFSetDirectory();
extern	int TIFFSetField();
extern	void TIFFWarning();
extern	int TIFFWriteDirectory();
extern	int TIFFWriteScanline();
#endif
#endif /* _TIFFIO_ */