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/* Libvisual-plugins - Standard plugins for libvisual
*
* Copyright (C) 2002, 2003, 2004, 2005, 2006 Dennis Smit <ds@nerds-incorporated.org>
*
* Authors: Dennis Smit <ds@nerds-incorporated.org>
*
* $Id: gfx-palette.c,v 1.6 2006/01/22 13:25:26 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 <math.h>
#include <string.h>
#include <libvisual/libvisual.h>
#include "common.h"
#include "misc.h"
#include "screen.h"
#include "gfx-palette.h"
void _oink_gfx_palette_init (OinksiePrivate *priv)
{
priv->pal_startup = 1;
priv->pal_data.fade_start = 1;
priv->pal_data.fade_steps = 100;
priv->pal_data.fade_poststeps = priv->pal_data.fade_steps;
priv->pal_data.fade_poststop = 1;
}
void _oink_gfx_palette_save_old (OinksiePrivate *priv)
{
/* If we haven't set up an fade yet, don't save the next old.
* this protects us from more event handles per screen draw
*/
if (priv->pal_data.pal_new == 1 && priv->pal_data.fade_stepsdone == priv->pal_data.fade_steps)
visual_palette_copy (&priv->pal_old, &priv->pal_cur);
priv->pal_data.fade_start = 1;
}
void _oink_gfx_palette_transform (OinksiePrivate *priv)
{
int i;
if (priv->pal_data.fade_start == 1)
{
priv->pal_data.fade_stepsdone = 0;
for (i = 0; i < 256; i++)
{
priv->pal_fades[i].r = (float) (priv->pal_cur.colors[i].r - priv->pal_old.colors[i].r) / (float) priv->pal_data.fade_steps;
priv->pal_fades[i].g = (float) (priv->pal_cur.colors[i].g - priv->pal_old.colors[i].g) / (float) priv->pal_data.fade_steps;
priv->pal_fades[i].b = (float) (priv->pal_cur.colors[i].b - priv->pal_old.colors[i].b) / (float) priv->pal_data.fade_steps;
priv->pal_fades[i].r_cur = priv->pal_old.colors[i].r;
priv->pal_fades[i].g_cur = priv->pal_old.colors[i].g;
priv->pal_fades[i].b_cur = priv->pal_old.colors[i].b;
}
priv->pal_data.fade_start = 0;
}
for (i = 0; i < 256; i++)
{
priv->pal_fades[i].r_cur += priv->pal_fades[i].r;
priv->pal_fades[i].g_cur += priv->pal_fades[i].g;
priv->pal_fades[i].b_cur += priv->pal_fades[i].b;
priv->pal_old.colors[i].r = priv->pal_fades[i].r_cur;
priv->pal_old.colors[i].g = priv->pal_fades[i].g_cur;
priv->pal_old.colors[i].b = priv->pal_fades[i].b_cur;
}
priv->pal_data.fade_stepsdone++;
if (priv->pal_data.fade_stepsdone >= priv->pal_data.fade_poststeps)
{
visual_palette_copy (&priv->pal_cur, &priv->pal_old);
priv->pal_data.pal_new = 0;
priv->pal_data.fade_start = 1;
priv->pal_startup = 0;
}
}
void _oink_gfx_palette_build (OinksiePrivate *priv, uint8_t funky)
{
/* save old palette for transistion */
_oink_gfx_palette_save_old (priv);
_oink_gfx_palette_build_gradient (priv, funky);
/* FIXME, changing fadesteps can fuck this up */
if (priv->pal_data.fade_poststop == 1 && priv->pal_startup == 0) {
switch (visual_random_context_int_range (priv->rcontext, 0, 5)) {
case 0:
case 1:
priv->pal_data.fade_poststeps = visual_random_context_int_range (priv->rcontext, 60, priv->pal_data.fade_steps);
break;
case 2:
priv->pal_data.fade_poststeps = visual_random_context_int_range (priv->rcontext, 40, priv->pal_data.fade_steps / 2);
break;
case 3:
priv->pal_data.fade_poststeps = visual_random_context_int_range (priv->rcontext, 20, priv->pal_data.fade_steps / 3);
break;
case 4:
priv->pal_data.fade_poststeps = visual_random_context_int_range (priv->rcontext, 80, priv->pal_data.fade_steps);
break;
default:
priv->pal_data.fade_poststeps = priv->pal_data.fade_steps;
break;
}
}
priv->pal_data.pal_new = 1;
}
void _oink_gfx_palette_color (OinksiePrivate *priv, int color, int red, int green, int blue)
{
priv->pal_cur.colors[color].r = red << 2;
priv->pal_cur.colors[color].g = green << 2;
priv->pal_cur.colors[color].b = blue << 2;
}
uint8_t _oink_gfx_palette_gradient_gen (OinksiePrivate *priv, uint8_t i, int mode)
{
static const float __magic = 2.0 * PI/256;
switch (mode)
{
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;
default:
break;
}
return 0;
}
void _oink_gfx_palette_build_gradient (OinksiePrivate *priv, uint8_t funky)
{
int i = 0;
int j = 0;
int k = 0;
int l = 0;
if (funky == TRUE)
i = 5;
else
i = 3;
do
{
j = visual_random_context_int_range (priv->rcontext, 0, i - 1);
k = visual_random_context_int_range (priv->rcontext, 0, i - 1);
l = visual_random_context_int_range (priv->rcontext, 0, i - 1);
} while (j == k || j == l || l == k);
for( i = 0; i <= 255; i++)
{
priv->pal_cur.colors[i].r = _oink_gfx_palette_gradient_gen (priv, i, j);
priv->pal_cur.colors[i].g = _oink_gfx_palette_gradient_gen (priv, i, k);
priv->pal_cur.colors[i].b = _oink_gfx_palette_gradient_gen (priv, i, l);
}
}
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