/* Copyright (C) 1994, 1997 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU ghostscript

  GNU ghostscript 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, or (at your option) any later version.

  GNU ghostscript 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
  ghostscript; see the file COPYING. If not, write to the Free Software Foundation,
  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

*/

/* $Id: gsht1.h,v 1.4 2005/12/13 16:57:21 jemarch Exp $ */
/* Extended public interface to halftones */

#ifndef gsht1_INCLUDED
#  define gsht1_INCLUDED

#include "gsht.h"

/* Procedural interface */
int gs_setcolorscreen(gs_state *, gs_colorscreen_halftone *);
int gs_currentcolorscreen(gs_state *, gs_colorscreen_halftone *);

/*
 * We include sethalftone here, even though it is a Level 2 feature,
 * because it turns out to be convenient to define setcolorscreen
 * using sethalftone.
 */
#ifndef gs_halftone_DEFINED
#  define gs_halftone_DEFINED
typedef struct gs_halftone_s gs_halftone;

#endif
/*
 * gs_halftone structures may have complex substructures.  We provide two
 * procedures for setting them.  gs_halftone assumes that the gs_halftone
 * structure and all its substructures was allocated with the same allocator
 * as the gs_state; gs_halftone_allocated looks in the structure itself (the
 * rc.memory member) to find the allocator that was used.  Both procedures
 * copy the top-level structure (using the appropriate allocator), but take
 * ownership of the substructures.
 */
int gs_sethalftone(gs_state *, gs_halftone *);
int gs_sethalftone_allocated(gs_state *, gs_halftone *);
int gs_currenthalftone(gs_state *, gs_halftone *);

#endif /* gsht1_INCLUDED */
