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- /* Copyright (C) 1995, 1996 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL 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 Free Public License (the
- "License") for full details.
-
- Every copy of AFPL 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 AFPL 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.
- */
-
- /*$Id: gxcvalue.h,v 1.2 2000/09/19 19:00:35 lpd Exp $ */
- /* 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 */
-