/* Copyright (C) 2001-2006 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 that
   license.  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.
*/

/* $Id$ */
/* Definitions for jbig2decode filter - Luratech version */
/* Requires scommon.h; strimpl.h if any templates are referenced */

#ifndef sjbig2_luratech_INCLUDED
#  define sjbig2_luratech_INCLUDED

#include "scommon.h"
#include <ldf_jb2.h>

/* See zfjbig2.c for details. */
typedef struct s_jbig2_global_data_s {
	void *data;
} s_jbig2_global_data_t;

/* JBIG2Decode internal stream state */
typedef struct stream_jbig2decode_state_s
{
    stream_state_common;	/* inherit base object from scommon.h */
    JB2_Handle_Document doc;	/* Luratech JBIG2 codec context */
    s_jbig2_global_data_t *global_struct; /* to protect it from freeing by GC */
    unsigned char *global_data;
    unsigned long global_size;
    unsigned char *inbuf;  /* compressed image data */
    unsigned long insize, infill;
    unsigned char *image;  /* decoded image data */
    unsigned long width, height;
    unsigned long row, stride;
    unsigned long offset;  /* next output byte to be returned */
    JB2_Error error;
}
stream_jbig2decode_state;

#define private_st_jbig2decode_state()	\
  gs_private_st_ptrs1(st_jbig2decode_state, stream_jbig2decode_state,\
    "jbig2decode filter state", jbig2decode_state_enum_ptrs,\
     jbig2decode_state_reloc_ptrs, global_struct)
extern const stream_template s_jbig2decode_template;

/* call in to process the JBIG2Globals parameter */
int
s_jbig2decode_make_global_data(byte *data, uint size, void **result);
int
s_jbig2decode_set_global_data(stream_state *ss, s_jbig2_global_data_t *gs);
void
s_jbig2decode_free_global_data(void *data);


/* JBIG2 encoder internal state */
typedef struct stream_jbig2encode_state_s
{
    stream_state_common;	/* inherit base object from scommon.h */
    JB2_Handle_Compress cmp;	/* compression library context */
    JB2_Handle_Document doc;
    unsigned long width, height;
    unsigned long stride;	/* line length in bytes */
    unsigned char *line;	/* single line working buffer */
    unsigned long linefill;	/* bytes in the working buffer */
    unsigned char *outbuf;	/* output data buffer */
    unsigned long outsize;	/* bytes available in the buffer */ 
    unsigned long outfill;	/* bytes written to the buffer */ 
    unsigned long offset;	/* bytes written from the buffer */ 

} stream_jbig2encode_state;

#define private_st_jbig2encode_state()	\
  gs_private_st_simple(st_jbig2encode_state, stream_jbig2encode_state,\
    "jbig2encode filter state")

extern const stream_template s_jbig2encode_template;

#endif /* sjbig2_luratech_INCLUDED */