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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 4.iso
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haeberli
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lum.h
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C/C++ Source or Header
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1994-08-01
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1KB
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42 lines
/*
* 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* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;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 Unpublished -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