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/***********************************************************************
Copyright (c) 2002-2007 Han The Thanh, <thanh@pdftex.org>
This file is part of pdfTeX.
pdfTeX 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.
pdfTeX 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 pdfTeX; if not, write to the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
This is experimental JBIG2 image support to pdfTeX. JBIG2 image decoding
is part of Adobe PDF-1.4, and requires Acroread 5.0 or later.
$Id$
***********************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include "ptexlib.h"
#include "ptexmac.h"
#include "image.h"
/* 7.3 Segment types */
#define M_SymbolDictionary 0
#define M_IntermediateTextRegion 4
#define M_ImmediateTextRegion 6
#define M_ImmediateLosslessTextRegion 7
#define M_PatternDictionary 16
#define M_IntermediateHalftoneRegion 20
#define M_ImmediateHalftoneRegion 22
#define M_ImmediateLosslessHalftoneRegion 23
#define M_IntermediateGenericRegion 36
#define M_ImmediateGenericRegion 38
#define M_ImmediateLosslessGenericRegion 39
#define M_IntermediateGenericRefinementRegion 40
#define M_ImmediateGenericRefinementRegion 42
#define M_ImmediateLosslessGenericRefinementRegion 43
#define M_PageInformation 48
#define M_EndOfPage 49
#define M_EndOfStripe 50
#define M_EndOfFile 51
#define M_Profiles 52
#define M_Tables 53
#define M_Extension 62
/**********************************************************************/
typedef enum { INITIAL, HAVEINFO, WRITEPDF } PHASE;
typedef struct _LITEM {
struct _LITEM *prev;
struct _LITEM *next;
void *d; /* data */
} LITEM;
typedef struct _LIST {
LITEM *first;
LITEM *last;
struct avl_table *tree;
} LIST;
typedef struct _SEGINFO {
unsigned long segnum;
boolean isrefered;
boolean refers;
unsigned int seghdrflags; /* set by readseghdr() */
boolean pageassocsizeflag; /* set by readseghdr() */
unsigned int reftosegcount; /* set by readseghdr() */
unsigned int countofrefered; /* set by readseghdr() */
unsigned int fieldlen; /* set by readseghdr() */
unsigned int segnumwidth; /* set by readseghdr() */
long segpage; /* set by readseghdr() */
unsigned long segdatalen; /* set by readseghdr() */
unsigned long hdrstart; /* set by readseghdr() */
unsigned long hdrend; /* set by readseghdr() */
unsigned long datastart;
unsigned long dataend;
boolean endofstripeflag; /* set by checkseghdrflags() */
boolean endofpageflag; /* set by checkseghdrflags() */
boolean pageinfoflag; /* set by checkseghdrflags() */
boolean endoffileflag; /* set by checkseghdrflags() */
} SEGINFO;
typedef struct _PAGEINFO {
LIST segments; /* segments associated with page */
unsigned long pagenum;
unsigned int width;
unsigned int height;
unsigned int xres;
unsigned int yres;
unsigned int pagesegmentflags;
unsigned int stripinginfo;
unsigned int stripedheight;
} PAGEINFO;
typedef struct _FILEINFO {
FILE *file;
char *filename;
long filesize;
LIST pages; /* not including page0 */
LIST page0;
unsigned int filehdrflags; /* set by readfilehdr() */
boolean sequentialaccess; /* set by readfilehdr() */
unsigned long numofpages; /* set by readfilehdr() */
unsigned long streamstart; /* set by get_jbig2_info() */
unsigned long pdfpage0objnum;
PHASE phase;
} FILEINFO;
/**********************************************************************/
static int comp_file_entry(const void *, const void *, void *);
static int comp_page_entry(const void *, const void *, void *);
static int comp_segment_entry(const void *, const void *, void *);
int ygetc(FILE *);
FILEINFO *new_fileinfo();
PAGEINFO *new_pageinfo();
void initseginfo(SEGINFO *);
void initlinkedlist(LIST *);
LIST *litem_append(LIST *);
void pages_maketree(LIST *);
void segments_maketree(LIST *);
PAGEINFO *find_pageinfo(LIST *, unsigned long);
SEGINFO *find_seginfo(LIST *, unsigned long);
unsigned int read2bytes(FILE *);
unsigned long read4bytes(FILE *);
unsigned long getstreamlen(LITEM *, boolean);
void readfilehdr(FILEINFO *);
boolean readseghdr(FILEINFO *, SEGINFO *);
void writeseghdr(FILEINFO *, SEGINFO *);
void checkseghdr(FILEINFO *, SEGINFO *);
void checkseghdrflags(SEGINFO * sip);
void markpage0seg(FILEINFO *, unsigned long);
unsigned long findstreamstart(FILEINFO *);
void rd_jbig2_info(FILEINFO *);
void wr_jbig2(FILEINFO *, unsigned long);
void read_jbig2_info(integer);
void write_jbig2(integer);
void flushjbig2page0objects();
/**********************************************************************/
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