/* Copyright (C) 2003-2004 artofcode LLC.  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.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. 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., +1(415)492-9861.
*/

/* $Id$ */
/* Definitions for JPXDecode filter (JPEG 2000) */
/* we link to the JasPer library for the actual decoding */

#ifndef sjpx_INCLUDED
#  define sjpx_INCLUDED

/* Requires scommon.h; strimpl.h if any templates are referenced */

#include "scommon.h"
#include <jasper/jasper.h>

/* Our local state consists of pointers to the JasPer library's
 * stream and image structs for sending and retrieving the
 * image data. There's no way to feed a jasper stream with
 * incremental buffers, so we also must spool the entire
 * compressed stream into our own buffer before handing it
 * to the library. We also keep track of how much of the
 * decoded image we have returned.
 */
typedef struct stream_jpxd_state_s
{
    stream_state_common;	/* a define from scommon.h */
    jas_image_t *image;
    jas_stream_t *stream;
    long offset; /* offset into the image bitmap of the next
                    byte to be returned */
    const gs_memory_t *jpx_memory;
    unsigned char *buffer; /* temporary buffer for compressed data */
    long bufsize; /* total size of the buffer */
    long buffill; /* number of bytes written into the buffer */
}
stream_jpxd_state;

#define private_st_jpxd_state()	\
  gs_private_st_simple(st_jpxd_state, stream_jpxd_state,\
    "JPXDecode filter state")
extern const stream_template s_jpxd_template;

#endif /* sjpx_INCLUDED */