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/* $Id$ */
/*
* Copyright (c) 1992 The Regents of the University of California.
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose, without fee, and without written agreement is
* hereby granted, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
#include <string.h>
#include <stdlib.h>
#include "video.h"
#include "proto.h"
#include "dither.h"
#include "ace/OS.h"
ACE_RCSID(mpeg_client, gray, "$Id$")
/*
*--------------------------------------------------------------
*
* GrayDitherImage --
*
* Dithers image into 128 gray scales. Simply maps luminance
* value into 1 of 128 gray scale colors (divide by two, essentially).
*
* Results:
* None.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
void
GrayDitherImage(unsigned char *lum, unsigned char *cr,
unsigned char *cb, unsigned char *out,
int h, int w)
{
int i, max = w*h/16;
for (i=0; i<max; i++) {
out[0] = pixel[lum[0]];
out[1] = pixel[lum[1]];
out[2] = pixel[lum[2]];
out[3] = pixel[lum[3]];
out[4] = pixel[lum[4]];
out[5] = pixel[lum[5]];
out[6] = pixel[lum[6]];
out[7] = pixel[lum[7]];
out[8] = pixel[lum[8]];
out[9] = pixel[lum[9]];
out[10] = pixel[lum[10]];
out[11] = pixel[lum[11]];
out[12] = pixel[lum[12]];
out[13] = pixel[lum[13]];
out[14] = pixel[lum[14]];
out[15] = pixel[lum[15]];
out += 16;
lum += 16;
}
}
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