home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright 1991, 1992, 1993, 1994, Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
- * the contents of this file may not be disclosed to third parties, copied or
- * duplicated in any form, in whole or in part, without the prior written
- * permission of Silicon Graphics, Inc.
- *
- * RESTRICTED RIGHTS LEGEND:
- * Use, duplication or disclosure by the Government is subject to restrictions
- * as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
- * and Computer Software clause at DFARS 252.227-7013, and/or in similar or
- * successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
- * rights reserved under the Copyright Laws of the United States.
- */
- #ifndef LUMDEF
- #define LUMDEF
-
- #define RLUM (0.3086)
- #define GLUM (0.6094)
- #define BLUM (0.0820)
-
- #define RINTLUM (79)
- #define GINTLUM (156)
- #define BINTLUM (21)
-
- #ifdef OLDWAY
- #define RLUM (0.299)
- #define GLUM (0.587)
- #define BLUM (0.114)
-
- #define RINTLUM (77)
- #define GINTLUM (150)
- #define BINTLUM (29)
- #endif
-
- #define ILUM(r,g,b) ((RINTLUM*(r)+GINTLUM*(g)+BINTLUM*(b))>>8)
- #define LUM(r,g,b) (RLUM*(r)+GLUM*(g)+BLUM*(b))
-
- #endif
-