File indexing completed on 2024-05-12 16:06:42

 /*
     Include file for fax routines
     This file is part of viewfax - g3/g4 fax processing software.
 
     SPDX-FileCopyrightText: 1990, 1995  Frank D. Cringle.
     SPDX-FileCopyrightText: 2005  Helge Deller <deller@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifndef _faxexpand_h_
 #define _faxexpand_h_
 
 #include <QImage>
 
 #include <sys/types.h>
 #ifndef Q_OS_WIN
 #include <unistd.h>
 #endif
 
 #define t32bits quint32
 #define t16bits quint16
 
 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 */
     t16bits *dataOrig;    /* copy of `data', in case we shift it */
     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 orient;           /* orientation - upsidedown, landscape, mirrored */
     int vres;             /* vertical resolution: 1 = fine  */
     QPoint dpi;           /* DPI horz/vert */
     void (*expander)(class pagenode *, drawfunc);
     unsigned int bytes_per_line;
     QString filename; /* The name of the file to be opened */
     QImage image;     /* The final image */
     uchar *imageData; /* The temporary raw image data */
 };
 
 /* 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);
 
 /* initialise code tables */
 extern void fax_init_tables();
 
 /* count lines in image */
 extern int G3count(class pagenode *pn, int twoD);
 
 #endif