/* Copyright (C) 1998 artofcode LLC.  All rights reserved.
  
  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  59 Temple Place, Suite 330, Boston, MA, 02111-1307.

*/

/*$Id: scfparam.c,v 1.2.6.1.2.1 2003/01/17 00:49:05 giles Exp $ */
/* CCITTFax filter parameter setting and reading */
#include "std.h"
#include "gserror.h"
#include "gserrors.h"
#include "gstypes.h"
#include "gsmemory.h"
#include "gsparam.h"
#include "scommon.h"
#include "scf.h"		/* for cfe_max_width */
#include "scfx.h"

/* Define the CCITTFax parameters. */
private const gs_param_item_t s_CF_param_items[] =
{
#define cfp(key, type, memb) { key, type, offset_of(stream_CF_state, memb) }
    cfp("Uncompressed", gs_param_type_bool, Uncompressed),
    cfp("K", gs_param_type_int, K),
    cfp("EndOfLine", gs_param_type_bool, EndOfLine),
    cfp("EncodedByteAlign", gs_param_type_bool, EncodedByteAlign),
    cfp("Columns", gs_param_type_int, Columns),
    cfp("Rows", gs_param_type_int, Rows),
    cfp("EndOfBlock", gs_param_type_bool, EndOfBlock),
    cfp("BlackIs1", gs_param_type_bool, BlackIs1),
    cfp("DamagedRowsBeforeError", gs_param_type_int, DamagedRowsBeforeError),
    cfp("FirstBitLowOrder", gs_param_type_bool, FirstBitLowOrder),
    cfp("DecodedByteAlign", gs_param_type_int, DecodedByteAlign),
#undef cfp
    gs_param_item_end
};

/* Define a limit on the Rows parameter, close to max_int. */
#define cf_max_height 32000

/* Get non-default CCITTFax filter parameters. */
stream_state_proc_get_params(s_CF_get_params, stream_CF_state);		/* check */
int
s_CF_get_params(gs_param_list * plist, const stream_CF_state * ss, bool all)
{
    stream_CF_state cfs_defaults;
    const stream_CF_state *defaults;

    if (all)
	defaults = 0;
    else {
	s_CF_set_defaults_inline(&cfs_defaults);
	defaults = &cfs_defaults;
    }
    return gs_param_write_items(plist, ss, defaults, s_CF_param_items);
}

/* Put CCITTFax filter parameters. */
stream_state_proc_put_params(s_CF_put_params, stream_CF_state);		/* check */
int
s_CF_put_params(gs_param_list * plist, stream_CF_state * ss)
{
    stream_CF_state state;
    int code;

    state = *ss;
    code = gs_param_read_items(plist, (void *)&state, s_CF_param_items);
    if (code >= 0 &&
	(state.K < -cf_max_height || state.K > cf_max_height ||
	 state.Columns < 0 || state.Columns > cfe_max_width ||
	 state.Rows < 0 || state.Rows > cf_max_height ||
	 state.DamagedRowsBeforeError < 0 ||
	 state.DamagedRowsBeforeError > cf_max_height ||
	 state.DecodedByteAlign < 1 || state.DecodedByteAlign > 16 ||
	 (state.DecodedByteAlign & (state.DecodedByteAlign - 1)) != 0)
	)
	code = gs_note_error(gs_error_rangecheck);
    if (code >= 0)
	*ss = state;
    return code;
}