/* Copyright (C) 1994, 1995, 1996, 1997, 1998 Aladdin Enterprises.  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: gxdither.h,v 1.6 2002/08/22 07:12:29 henrys Exp $ */
/* Interface to gxdither.c */

#ifndef gxdither_INCLUDED
#  define gxdither_INCLUDED

#include "gxfrac.h"

#ifndef gx_device_halftone_DEFINED
#  define gx_device_halftone_DEFINED
typedef struct gx_device_halftone_s gx_device_halftone;
#endif

/*
 * Render DeviceN possibly by halftoning.
 *  pcolors = pointer to an array color values (as fracs)
 *  pdevc - pointer to device color structure
 *  dev = pointer to device data structure
 *  pht = pointer to halftone data structure
 *  ht_phase  = halftone phase
 *  gray_colorspace = true -> current color space is DeviceGray.
 *  This is part of a kludge to minimize differences in the
 *  regression testing.
 */
int gx_render_device_DeviceN(frac * pcolor, gx_device_color * pdevc,
	gx_device * dev, gx_device_halftone * pdht,
	const gs_int_point * ht_phase, bool gray_colorspace);
/*
 * Reduce a colored halftone with 0 or 1 varying plane(s) to a pure color
 * or a binary halftone.
 */
int gx_devn_reduce_colored_halftone(gx_device_color *pdevc, gx_device *dev);

#endif /* gxdither_INCLUDED */
