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/* Libvisual-plugins - Standard plugins for libvisual
*
* Copyright (C) 2000, 2001 Remi Arquier <arquier@crans.org>
*
* Authors: Remi Arquier <arquier@crans.org>
* Dennis Smit <ds@nerds-incorporated.org>
*
* $Id: pal.c,v 1.5 2005/12/20 18:49:12 synap Exp $
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <math.h>
#include "def.h"
#include "struct.h"
#include "analyser_struct.h"
#include "jess.h"
const float __magic = 2.0 * PI / 256;
uint8_t courbes_palette(JessPrivate *priv, uint8_t i, int no_courbe)
{
/* Optimisation par Karl Soulabaille */
switch(no_courbe)
{
case 0:
return (i * i * i) >> 16;
break;
case 1:
return (i * i) >> 8;
break;
case 2:
return (uint8_t) i ;
break;
case 3:
return (uint8_t) (128 * fabs(sin(__magic * i)));
break;
case 4:
return 0;
break;
}
return 0;
}
void random_palette(JessPrivate *priv)
{
int i,j,k,l;
again_mister:
;
if (priv->conteur.psy == 1)
i = 5;
else
i = 3;
j=visual_random_context_int(priv->rcontext) % i;
k=visual_random_context_int(priv->rcontext) % i;
l=visual_random_context_int(priv->rcontext) % i;
priv->conteur.triplet = j+10*k+100*l;
if ((j==k) || (j==l) || (l==k))
goto again_mister;
for (i = 0; i < 256; i++){
priv->jess_pal.colors[i].r = courbes_palette(priv, i, j);
priv->jess_pal.colors[i].g = courbes_palette(priv, i, k);
priv->jess_pal.colors[i].b = courbes_palette(priv, i, l);
}
}
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