shithub: jbig2

ref: 50d99ce72e1722427415ac745445dc1ca7e67c83
dir: jbig2/jbig2_halftone.h

/*
    jbig2dec

    Copyright (C) 2012 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 further licensing information refer to http://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.
*/

#ifndef _JBIG2_HALFTONE_H
#define _JBIG2_HALFTONE_H

typedef struct {
  int n_patterns;
  Jbig2Image **patterns;
  int HPW, HPH;
} Jbig2PatternDict;


/* Table 24 */
typedef struct {
  bool HDMMR;
  uint32_t HDPW;
  uint32_t HDPH;
  uint32_t GRAYMAX;
  int HDTEMPLATE;
} Jbig2PatternDictParams;

/* Table 33 */
typedef struct {
  byte flags;
  uint32_t HGW;
  uint32_t HGH;
  int32_t  HGX;
  int32_t  HGY;
  uint16_t HRX;
  uint16_t HRY;
  bool HMMR;
  int HTEMPLATE;
  bool HENABLESKIP;
  Jbig2ComposeOp op;
  bool HDEFPIXEL;
} Jbig2HalftoneRegionParams;

Jbig2PatternDict* 
jbig2_hd_new(Jbig2Ctx *ctx, const Jbig2PatternDictParams *params, 
             Jbig2Image *image);

void
jbig2_hd_release(Jbig2Ctx *ctx, Jbig2PatternDict *dict);

uint8_t **
jbig2_decode_gray_scale_image(Jbig2Ctx *ctx, Jbig2Segment* segment,
                              const byte *data, const size_t size,
                              bool GSMMR, uint32_t GSW, uint32_t GSH,
                              uint32_t GSBPP, bool GSUSESKIP,
                              Jbig2Image *GSKIP, int GSTEMPLATE,
                              Jbig2ArithCx *GB_stats);

Jbig2PatternDict *
jbig2_decode_ht_region_get_hpats(Jbig2Ctx *ctx, Jbig2Segment *segment);

int
jbig2_decode_halftone_region(Jbig2Ctx *ctx, Jbig2Segment *segment,
                             Jbig2HalftoneRegionParams *params,
                             const byte *data, const size_t size,
                             Jbig2Image *image,
                             Jbig2ArithCx *GB_stats);

#endif /* _JBIG2_HALFTONE_H */