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Diffstat (limited to 'gtk+-mingw/include/jbig85.h')
| -rw-r--r-- | gtk+-mingw/include/jbig85.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/gtk+-mingw/include/jbig85.h b/gtk+-mingw/include/jbig85.h new file mode 100644 index 0000000..2be785d --- /dev/null +++ b/gtk+-mingw/include/jbig85.h @@ -0,0 +1,173 @@ +/* + * Header file for the T.85 "light" version of the portable + * JBIG image compression library + * + * Copyright 1995-2008 -- Markus Kuhn -- http://www.cl.cam.ac.uk/~mgk25/ + * + * $Id: jbig85.h 1303 2008-08-30 20:16:20Z mgk25 $ + */ + +#ifndef JBG85_H +#define JBG85_H + +#include <stddef.h> +#include "jbig_ar.h" + +/* + * JBIG-KIT version number + */ + +#define JBG85_VERSION "2.0" + +/* + * JBIG-KIT licence agreement reference code: + * If you use JBIG-KIT under a commercial licence, please replace + * below the letters GPL with the reference code that you received + * with your licence agreement. (This code is typically a letter "A" + * followed by four decimal digits, e.g. "A1234".) + */ + +#define JBG85_LICENCE "GPL" + +/* + * Maximum number of ATMOVEs per stripe that decoder can handle + */ + +#define JBG85_ATMOVES_MAX 1 + +#ifndef JBG_LRLTWO + +/* + * Option and order flags + */ + +#define JBG_LRLTWO 0x40 +#define JBG_VLENGTH 0x20 +#define JBG_TPBON 0x08 + +/* + * Possible error code return values + */ + +#define JBG_EOK (0 << 4) +#define JBG_EOK_INTR (1 << 4) +#define JBG_EAGAIN (2 << 4) +#define JBG_ENOMEM (3 << 4) +#define JBG_EABORT (4 << 4) +#define JBG_EMARKER (5 << 4) +#define JBG_EINVAL (6 << 4) +#define JBG_EIMPL (7 << 4) + +#endif + +/* + * Status of a JBIG encoder + */ + +struct jbg85_enc_state { + unsigned long x0, y0; /* size of the input image */ + unsigned long l0; /* number of lines per stripe */ + int options; /* encoding parameters */ + int newlen; /* 0 = jbg85_enc_newlen() has not yet been called + 1 = jbg85_enc_newlen() has updated y0, NEWLEN pending + 2 = NEWLEN has already been output */ + unsigned mx; /* maximum ATMOVE window size */ + unsigned long y; /* next line number to be encoded */ + unsigned long i; /* next per-stripe line number to be encoded */ + int tx; /* x-offset of adaptive template pixel */ + unsigned long c_all, c[128]; /* adaptive template algorithm variables */ + int new_tx; /* -1 = no ATMOVE pending, otherwise new TX value */ + int ltp_old; /* true if line y-1 was "typical" */ + struct jbg_arenc_state s; /* arithmetic encoder status */ + void (*data_out)(unsigned char *start, size_t len, void *file); + /* data write callback */ + void *file; /* parameter passed to data_out() */ + unsigned char *comment; /* content of comment marker segment to be added + at next opportunity (will be reset to NULL + as soon as comment has been written) */ + unsigned long comment_len; /* length of data pointed to by comment */ +}; + + +/* + * Status of a JBIG decoder + */ + +struct jbg85_dec_state { + /* data from BIH */ + unsigned long x0, y0; /* size of the full image */ + unsigned long l0; /* number of lines per stripe */ + int options; /* encoding parameters */ + int mx; /* maximum ATMOVE window size */ + /* image data */ + int p[3]; /* curr. line starts at linebuf+bpl*p[0], prev. line starts + * at linebuf+bpl*p[1], its predecessor at linebuf+bpl*p[2] */ + unsigned char *linebuf; /* buffer region provided by caller */ + size_t linebuf_len; + size_t bpl; /* bytes per line */ + /* status information */ + int tx; /* x-offset of AT pixel */ + struct jbg_ardec_state s; /* arithmetic decoder status */ + unsigned long bie_len; /* number of bytes read so far */ + unsigned char buffer[20]; /* used to store BIH or marker segments fragm. */ + int buf_len; /* number of bytes in buffer */ + unsigned long comment_skip; /* remaining bytes of a COMMENT segment */ + unsigned long x; /* x position of next pixel */ + unsigned long stripe; /* current stripe */ + unsigned long y; /* line in image (first line is 0) */ + unsigned long i; /* line in current stripe (first line of stripe is 0) */ + int at_moves; /* number of AT moves in the current stripe */ + unsigned long at_line[JBG85_ATMOVES_MAX]; /* lines at which an * + * AT move will happen */ + int at_tx[JBG85_ATMOVES_MAX]; /* ATMOVE x-offsets in current stripe */ + unsigned long line_h1, line_h2, line_h3; /* variables of decode_pscd */ + int pseudo; /* flag for TPBON/TPDON: next pixel is pseudo pixel */ + int lntp; /* flag for TP: line is not typical */ + int (*line_out)(const struct jbg85_dec_state *s, + unsigned char *start, size_t len, + unsigned long y, void *file); + /* data write callback */ + void *file; /* parameter passed to data_out() */ + int intr; /* flag that line_out requested interrupt */ + int end_of_bie; /* flag that the end of the BIE has been signalled */ +}; + + +/* function prototypes */ + +void jbg85_enc_init(struct jbg85_enc_state *s, + unsigned long x0, unsigned long y0, + void (*data_out)(unsigned char *start, size_t len, + void *file), + void *file); +void jbg85_enc_options(struct jbg85_enc_state *s, int options, + unsigned long l0, int mx); +void jbg85_enc_lineout(struct jbg85_enc_state *s, unsigned char *line, + unsigned char *prevline, unsigned char *prevprevline); +void jbg85_enc_newlen(struct jbg85_enc_state *s, unsigned long y0); +void jbg85_enc_abort(struct jbg85_enc_state *s); + +void jbg85_dec_init(struct jbg85_dec_state *s, + unsigned char *buf, size_t buflen, + int (*line_out)(const struct jbg85_dec_state *s, + unsigned char *start, size_t len, + unsigned long y, void *file), + void *file); +int jbg85_dec_in(struct jbg85_dec_state *s, unsigned char *data, size_t len, + size_t *cnt); +int jbg85_dec_end(struct jbg85_dec_state *s); +const char *jbg85_strerror(int errnum); + +/* some macros for examining decoder state */ + +#define jbg85_dec_finished(s) ((s)->bie_len == 20 && (s)->y >= (s)->y0) +/* enquire about image size */ +#define jbg85_dec_getwidth(s) ((s)->x0) +#define jbg85_dec_getheight(s) ((s)->y0) +/* enquire about validity of image-size results */ +#define jbg85_dec_validwidth(s) ((s)->bie_len == 20) +#define jbg85_dec_finalheight(s) ((s)->bie_len == 20 && \ + ((((s)->options & JBG_VLENGHT) == 0) || \ + ((s)->y >= (s)->y0))) + +#endif /* JBG85_H */ |