jbig2_symbol_dict.h

来自「SumatraPDF是一款小型开源的pdf阅读工具。虽然玲珑小巧（只有800多K」· C头文件 代码 · 共 60 行

/*
    jbig2dec
    
    Copyright (C) 2001-2002 Artifex Software, Inc.
    
    This software is distributed under license and may not
    be copied, modified or distributed except as expressly
    authorized under the terms of the license contained in
    the file LICENSE in this distribution.
                                                                                
    For information on commercial licensing, go to
    http://www.artifex.com/licensing/ or contact
    Artifex Software, Inc.,  101 Lucas Valley Road #110,
    San Rafael, CA  94903, U.S.A., [phone].

    $Id: jbig2_symbol_dict.h 461 2008-05-07 21:37:02Z giles $

    symbol dictionary header
 */

/* the results of decoding a symbol dictionary */
typedef struct {
    int n_symbols;
    Jbig2Image **glyphs;
} Jbig2SymbolDict;

/* decode a symbol dictionary segment and store the results */
int
jbig2_symbol_dictionary(Jbig2Ctx *ctx, Jbig2Segment *segment,
			const byte *segment_data);

/* get a particular glyph by index */
Jbig2Image *
jbig2_sd_glyph(Jbig2SymbolDict *dict, unsigned int id);

/* return a new empty symbol dict */
Jbig2SymbolDict *
jbig2_sd_new(Jbig2Ctx *ctx, int n_symbols);

/* release the memory associated with a symbol dict */
void
jbig2_sd_release(Jbig2Ctx *ctx, Jbig2SymbolDict *dict);

/* generate a new symbol dictionary by concatenating a list of
   existing dictionaries */
Jbig2SymbolDict *
jbig2_sd_cat(Jbig2Ctx *ctx, int n_dicts,
			Jbig2SymbolDict **dicts);

/* count the number of dictionary segments referred 
   to by the given segment */
int
jbig2_sd_count_referred(Jbig2Ctx *ctx, Jbig2Segment *segment);

/* return an array of pointers to symbol dictionaries referred 
   to by a segment */
Jbig2SymbolDict **
jbig2_sd_list_referred(Jbig2Ctx *ctx, Jbig2Segment *segment);