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/* Include file for fax routines
Copyright (C) 1990, 1995 Frank D. Cringle.
Copyright (C) 2005 Helge Deller <[email protected]>
This file is part of viewfax - g3/g4 fax processing software.
viewfax 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef _faxexpand_h_
#define _faxexpand_h_
#include <sys/types.h>
#include <unistd.h>
#include <tqglobal.h>
#include <tqimage.h>
#define t32bits TQ_UINT32
#define t16bits TQ_UINT16
typedef t16bits pixnum;
class pagenode;
/* drawfunc() points to a function which processes a line of the
expanded image described as a list of run lengths.
run is the base of an array of lengths, starting with a
(possibly empty) white run for line number linenum.
pn points to the page descriptor */
typedef void (*drawfunc)(pixnum *run, int linenum, class pagenode *pn);
struct strip { /* tiff strip descriptor */
off_t offset; /* offset in file */
off_t size; /* size of this strip */
};
/* defines for the pagenode member: type */
#define FAX_TIFF 1
#define FAX_RAW 2
class pagenode { /* compressed page descriptor */
public:
pagenode();
~pagenode() { };
int nstrips; /* number of strips */
int rowsperstrip; /* number of rows per strip */
int stripnum; /* current strip while expanding */
struct strip *strips; /* array of strips containing fax data in file */
t16bits *data; /* in-memory copy of strip */
size_t length; /* length of data */
TQSize size; /* width & height of page in pixels */
int inverse; /* black <=> white */
int lsbfirst; /* bit order is lsb first */
int type; /* Bernd: tiff vs no tiff*/
int orient; /* orientation - upsidedown, landscape, mirrored */
int vres; /* vertical resolution: 1 = fine */
TQPoint dpi; /* DPI horz/vert */
void (*expander)(class pagenode *, drawfunc);
TQImage image;
unsigned int bytes_per_line;
};
extern class pagenode *firstpage, *lastpage, *thispage;
extern class pagenode defaultpage;
/* page orientation flags */
#define TURN_NONE 0
#define TURN_U 1
#define TURN_L 2
#define TURN_M 4
/* fsm state codes */
#define S_Null 0
#define S_Pass 1
#define S_Horiz 2
#define S_V0 3
#define S_VR 4
#define S_VL 5
#define S_Ext 6
#define S_TermW 7
#define S_TermB 8
#define S_MakeUpW 9
#define S_MakeUpB 10
#define S_MakeUp 11
#define S_EOL 12
/* state table entry */
struct tabent {
unsigned char State;
unsigned char Width; /* width of code in bits */
pixnum Param; /* run length */
};
extern struct tabent MainTable[]; /* 2-D state table */
extern struct tabent WhiteTable[]; /* White run lengths */
extern struct tabent BlackTable[]; /* Black run lengths */
void MHexpand(class pagenode *pn, drawfunc df);
void g31expand(class pagenode *pn, drawfunc df);
void g32expand(class pagenode *pn, drawfunc df);
void g4expand(class pagenode *pn, drawfunc df);
unsigned char *getstrip(class pagenode *pn, int strip);
class pagenode *notefile(const char *name);
int notetiff(const char *name);
/* initialise code tables */
extern void fax_init_tables(void);
/* count lines in image */
extern int G3count(class pagenode *pn, int twoD);
#endif
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