/* 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: zcolor2.c 8022 2007-06-05 22:23:38Z giles $ */
/* Level 2 color operators */
#include "ghost.h"
#include "string_.h"
#include "oper.h"
#include "gsmatrix.h"
#include "gsstruct.h"
#include "gxcspace.h"
#include "gscolor2.h"
#include "igstate.h"
#include "store.h"


/*
 *  -   .useralternate   <bool>
 *
 * Push true if the current color space contains a base or alternate
 * color space and makes use of that color space (e.g.: a Separation
 * color space for a component not supported by the process color model.
 */
private int
zusealternate(i_ctx_t * i_ctx_p)
{
    os_ptr                  op = osp;
    const gs_color_space *  pcs = gs_currentcolorspace(igs);

    push(1);
    make_bool(op, pcs->base_space != 0);
    return 0;
}


/* ------ Initialization procedure ------ */

const op_def    zcolor2_l2_op_defs[] = {
    op_def_begin_level2(),
    { "0.usealternate", zusealternate },
    op_def_end(0)
};
