head	1.3;
access;
symbols
	OCT93:1.3;
locks;
comment	@ * @;


1.3
date	93.08.20.02.48.24;	author Rhialto;	state Exp;
branches;
next	1.2;

1.2
date	93.06.11.16.33.37;	author Rhialto;	state Exp;
branches;
next	1.1;

1.1
date	93.06.11.14.53.53;	author Rhialto;	state Exp;
branches;
next	;


desc
@Stuff for g3 file conversion
@


1.3
log
@Add hack for auto-detecting fax bit order.
@
text
@/* Derived from gdevdfax.c */
/* $Id: faxfile.h,v 1.2 1993/06/11 16:33:37 Rhialto Exp $
 * $Log: faxfile.h,v $
 * Revision 1.2  1993/06/11  16:33:37  Rhialto
 * First real RCS checkin
 *
 */
/*************************************************************************
 *	Format of page header in PC Research "group_3" FAX file
 *
 *	Note that all "shorts" are stored LSB in lowest byte address
 *************************************************************************/
typedef struct
{
	char	magic[24];
} FAXBREAK;

#define FAXMAGIC	"\000PC Research, Inc\000\000\000\000\000\000"

typedef struct
{
/*24*/	short	pages;		/* Number of pages in file */
/*26*/	short	pagenum;
/*28*/	char	msbfirst;	/* Coding used in file for codewords */
				/* MUST be set to 1, meaning the codewords */
				/* are filled starting with the most */
				/* significant bit */
/*29*/	char	hires;		/* Set to 1 for Hi resolution, else 0 */
/*30*/	char	dirty;		/* File may contain T.4 errors if 1, else 0 */
				/* e.g. it was received by FAX, not created */
				/* by a program */
/*31*/	char	reservedc;
/*32*/	short	reserved[12];
} FAXINFO;

#define OFFSET_PAGES	24

typedef struct
{
	char	jt0;
	char	jthires;	/* Set to 0x40 for Hi resolution, else 0 */
	char	jt2;
	char	jt3;
	char	jt4;
	char	jt5;
	char	jt6;
	char	jt7;
} JTINFO;

/*
 *	This appears before each page in a FAX file
 */
typedef struct
{
	FAXBREAK	id;
	FAXINFO 	info;
	JTINFO		jtinfo;
} FAXHDR;

/*
 *	Some FAX-related data
 */

/* The device descriptor */
#define X_DPI 204
#define Y_DPI 196	    /* hires; non-hires is half this resolution */
#define LINE_SIZE ((X_DPI * 85 / 10 + 7) / 8)   /* bytes per line */

#define LINE_BITS_0 1728
#define LINE_BITS_1 2048
#define LINE_BITS_2 2432

#define LINE_BITS LINE_BITS_0	/* only one supported now */

/*
 * Prototypes
 */
/* tofax.c */
long faxin_open_fp(FILE *file, int dostretch, int doreverse);
int faxin_begin_page(FILE *file);
int fromfax(FILE *inf, unsigned char *bitrow);
/* tofax.c */
struct faxout;
struct faxout  *faxout_open (char *, int);
struct faxout  *faxout_open_fp (FILE *, int);
int	faxout_begin_page (struct faxout *, int);
int	faxout_end_page (struct faxout *);
int	faxout_close (struct faxout *);
void	tofax(struct faxout *faxp, unsigned char *p, int linebits);

@


1.2
log
@First real RCS checkin
@
text
@d2 5
a6 2
/* $Id$
 * $Log$
d79 1
a79 1
long faxin_open_fp(FILE *file, int dostretch);
@


1.1
log
@Initial revision
@
text
@d2 3
@