/* 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: gxdither.h 8022 2007-06-05 22:23:38Z giles $ */
/* 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
 *  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);
/*
 * 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 */
