/* Copyright (C) 2001-2012 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   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.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134, San Rafael,
   CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/*
    jbig2dec
*/

/**
 * Headers for Text region handling
 **/

typedef enum {
    JBIG2_CORNER_BOTTOMLEFT = 0,
    JBIG2_CORNER_TOPLEFT = 1,
    JBIG2_CORNER_BOTTOMRIGHT = 2,
    JBIG2_CORNER_TOPRIGHT = 3
} Jbig2RefCorner;

typedef struct {
    bool SBHUFF;
    bool SBREFINE;
    bool SBDEFPIXEL;
    Jbig2ComposeOp SBCOMBOP;
    bool TRANSPOSED;
    Jbig2RefCorner REFCORNER;
    int SBDSOFFSET;
    /* int SBW; */
    /* int SBH; */
    uint32_t SBNUMINSTANCES;
    int LOGSBSTRIPS;
    int SBSTRIPS;
    /* int SBNUMSYMS; */
    /* SBSYMCODES */
    /* SBSYMCODELEN */
    /* SBSYMS */
    Jbig2HuffmanTable *SBHUFFFS;
    Jbig2HuffmanTable *SBHUFFDS;
    Jbig2HuffmanTable *SBHUFFDT;
    Jbig2HuffmanTable *SBHUFFRDW;
    Jbig2HuffmanTable *SBHUFFRDH;
    Jbig2HuffmanTable *SBHUFFRDX;
    Jbig2HuffmanTable *SBHUFFRDY;
    Jbig2HuffmanTable *SBHUFFRSIZE;
    Jbig2ArithIntCtx *IADT;
    Jbig2ArithIntCtx *IAFS;
    Jbig2ArithIntCtx *IADS;
    Jbig2ArithIntCtx *IAIT;
    Jbig2ArithIaidCtx *IAID;
    Jbig2ArithIntCtx *IARI;
    Jbig2ArithIntCtx *IARDW;
    Jbig2ArithIntCtx *IARDH;
    Jbig2ArithIntCtx *IARDX;
    Jbig2ArithIntCtx *IARDY;
    bool SBRTEMPLATE;
    int8_t sbrat[4];
} Jbig2TextRegionParams;

int
jbig2_decode_text_region(Jbig2Ctx *ctx, Jbig2Segment *segment,
                         const Jbig2TextRegionParams *params,
                         const Jbig2SymbolDict *const *dicts, const uint32_t n_dicts,
                         Jbig2Image *image, const byte *data, const size_t size, Jbig2ArithCx *GR_stats, Jbig2ArithState *as, Jbig2WordStream *ws);