/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/
#ifndef __gdefs_h__
#define __gdefs_h__

/*==================*
 * TYPE DEFINITIONS *
 *==================*/

typedef unsigned char byte;
typedef unsigned short word;
#pragma once

#define	dabs(a) (((a)<0) ? -(a) : (a))
#define CLAMP(v,l,h) ((v)<(l) ? (l) : (v)>(h) ? (h) : v)
#define	xswap(a,b) { a^=b; b^=a; a^=b; }
#define lum(a) ( 0.2990*(a>>16) + 0.5870*((a>>8)&0xff) + 0.1140*(a&0xff) )
#define gsign(a)  	((a) < 0 ? -1 : 1)
#define mnint(a)	((a) < 0 ? (int)(a - 0.5) : (int)(a + 0.5))
#define mmax(a, b)  	((a) > (b) ? (a) : (b))
#define mmin(a, b)  	((a) < (b) ? (a) : (b))
#define RGBDIST( src0, src1 ) ( ((src0[0]-src1[0])*(src0[0]-src1[0])) + \
								((src0[1]-src1[1])*(src0[1]-src1[1])) + \
								((src0[2]-src1[2])*(src0[2]-src1[2])) )

#define RGBADIST( src0, src1 ) ( ((src0[0]-src1[0])*(src0[0]-src1[0])) + \
								 ((src0[1]-src1[1])*(src0[1]-src1[1])) + \
								 ((src0[2]-src1[2])*(src0[2]-src1[2])) + \
								 ((src0[3]-src1[3])*(src0[3]-src1[3])) )


#define RMULT 0.2990f				// use these for televisions
#define GMULT 0.5870f				
#define BMULT 0.1140f

#define RIEMULT -0.16874f
#define RQEMULT  0.50000f
#define GIEMULT -0.33126f
#define GQEMULT -0.41869f
#define BIEMULT  0.50000f
#define BQEMULT -0.08131f

#endif // gdefs