/* Copyright (C) 1995, 1996 Aladdin Enterprises.  All rights reserved.
  
  This file is part of Aladdin Ghostscript.
  
  Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author
  or distributor accepts any responsibility for the consequences of using it,
  or for whether it serves any particular purpose or works at all, unless he
  or she says so in writing.  Refer to the Aladdin Ghostscript Free Public
  License (the "License") for full details.
  
  Every copy of Aladdin Ghostscript must include a copy of the License,
  normally in a plain ASCII text file named PUBLIC.  The License grants you
  the right to copy, modify and redistribute Aladdin Ghostscript, but only
  under certain conditions described in the License.  Among other things, the
  License requires that the copyright notice and this notice be preserved on
  all copies.
*/

/* gxcvalue.h */
/* Definition of device color values */

#ifndef gxcvalue_INCLUDED
#  define gxcvalue_INCLUDED

/* Define the type for gray or RGB values at the driver interface. */
typedef unsigned short gx_color_value;
#define arch_sizeof_gx_color_value arch_sizeof_short
/* We might use less than the full range someday. */
/* ...bits must lie between 8 and 16. */
#define gx_color_value_bits (sizeof(gx_color_value) * 8)
#define gx_max_color_value ((gx_color_value)((1L << gx_color_value_bits) - 1))
#define gx_color_value_to_byte(cv)\
  ((cv) >> (gx_color_value_bits - 8))
#define gx_color_value_from_byte(cb)\
  (((cb) << (gx_color_value_bits - 8)) + ((cb) >> (16 - gx_color_value_bits)))

/* Convert between gx_color_values and fracs. */
#define frac2cv(fr) frac2ushort(fr)
#define cv2frac(cv) ushort2frac(cv)

#endif					/* gxcvalue_INCLUDED */
