xref: /plan9/sys/src/cmd/gs/src/gxlum.h (revision 593dc095aefb2a85c828727bbfa9da139a49bdf4)
1 /* Copyright (C) 1992 Aladdin Enterprises.  All rights reserved.
2 
3   This software is provided AS-IS with no warranty, either express or
4   implied.
5 
6   This software is distributed under license and may not be copied,
7   modified or distributed except as expressly authorized under the terms
8   of the license contained in the file LICENSE in this distribution.
9 
10   For more information about licensing, please refer to
11   http://www.ghostscript.com/licensing/. For information on
12   commercial licensing, go to http://www.artifex.com/licensing/ or
13   contact Artifex Software, Inc., 101 Lucas Valley Road #110,
14   San Rafael, CA  94903, U.S.A., +1(415)492-9861.
15 */
16 
17 /* $Id: gxlum.h,v 1.4 2002/02/21 22:24:53 giles Exp $ */
18 /* Luminance computation parameters for Ghostscript */
19 
20 #ifndef gxlum_INCLUDED
21 #  define gxlum_INCLUDED
22 
23 /* Color weights used for computing luminance. */
24 #define lum_red_weight	30
25 #define lum_green_weight	59
26 #define lum_blue_weight	11
27 #define lum_all_weights	(lum_red_weight + lum_green_weight + lum_blue_weight)
28 
29 #endif /* gxlum_INCLUDED */
30