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https://invent.kde.org/graphics/okular
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123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
/* Include file for fax routines
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Copyright (C) 1990, 1995 Frank D. Cringle.
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Copyright (C) 2005 Helge Deller <deller@kde.org>
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This file is part of viewfax - g3/g4 fax processing software.
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viewfax is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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#ifndef _faxexpand_h_
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#define _faxexpand_h_
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#include <QImage>
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#include <sys/types.h>
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#ifndef Q_OS_WIN
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#include <unistd.h>
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#endif
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#define t32bits quint32
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#define t16bits quint16
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typedef t16bits pixnum;
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class pagenode;
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/* drawfunc() points to a function which processes a line of the
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expanded image described as a list of run lengths.
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run is the base of an array of lengths, starting with a
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(possibly empty) white run for line number linenum.
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pn points to the page descriptor */
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typedef void (*drawfunc)(pixnum *run, int linenum, class pagenode *pn);
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struct strip { /* tiff strip descriptor */
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off_t offset; /* offset in file */
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off_t size; /* size of this strip */
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};
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/* defines for the pagenode member: type */
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#define FAX_TIFF 1
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#define FAX_RAW 2
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class pagenode { /* compressed page descriptor */
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public:
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pagenode();
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~pagenode() { }
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int nstrips; /* number of strips */
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int rowsperstrip; /* number of rows per strip */
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int stripnum; /* current strip while expanding */
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struct strip *strips; /* array of strips containing fax data in file */
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t16bits *data; /* in-memory copy of strip */
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t16bits *dataOrig; /* copy of `data', in case we shift it */
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size_t length; /* length of data */
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QSize size; /* width & height of page in pixels */
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int inverse; /* black <=> white */
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int lsbfirst; /* bit order is lsb first */
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int orient; /* orientation - upsidedown, landscape, mirrored */
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int vres; /* vertical resolution: 1 = fine */
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QPoint dpi; /* DPI horz/vert */
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void (*expander)(class pagenode *, drawfunc);
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unsigned int bytes_per_line;
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QString filename; /* The name of the file to be opened */
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QImage image; /* The final image */
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uchar *imageData; /* The temporary raw image data */
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};
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/* page orientation flags */
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#define TURN_NONE 0
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#define TURN_U 1
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#define TURN_L 2
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#define TURN_M 4
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/* fsm state codes */
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#define S_Null 0
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#define S_Pass 1
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#define S_Horiz 2
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#define S_V0 3
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#define S_VR 4
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#define S_VL 5
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#define S_Ext 6
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#define S_TermW 7
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#define S_TermB 8
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#define S_MakeUpW 9
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#define S_MakeUpB 10
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#define S_MakeUp 11
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#define S_EOL 12
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/* state table entry */
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struct tabent {
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unsigned char State;
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unsigned char Width; /* width of code in bits */
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pixnum Param; /* run length */
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};
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extern struct tabent MainTable[]; /* 2-D state table */
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extern struct tabent WhiteTable[]; /* White run lengths */
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extern struct tabent BlackTable[]; /* Black run lengths */
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void MHexpand(class pagenode *pn, drawfunc df);
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void g31expand(class pagenode *pn, drawfunc df);
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void g32expand(class pagenode *pn, drawfunc df);
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void g4expand(class pagenode *pn, drawfunc df);
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/* initialise code tables */
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extern void fax_init_tables(void);
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/* count lines in image */
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extern int G3count(class pagenode *pn, int twoD);
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#endif
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