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Diffstat (limited to 'kfaxview/libkfaximage/faxexpand.h')
| -rw-r--r-- | kfaxview/libkfaximage/faxexpand.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/kfaxview/libkfaximage/faxexpand.h b/kfaxview/libkfaximage/faxexpand.h new file mode 100644 index 00000000..8da4e8bc --- /dev/null +++ b/kfaxview/libkfaximage/faxexpand.h @@ -0,0 +1,126 @@ +/* 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 <qglobal.h> +#include <qimage.h> + +#define t32bits Q_UINT32 +#define t16bits Q_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 */ + QSize 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 */ + QPoint dpi; /* DPI horz/vert */ + void (*expander)(class pagenode *, drawfunc); + QImage 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 |