/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include <string.h>
#include <gst/gst.h>


#include "flx_color.h"

FlxColorSpaceConverter *
flx_colorspace_converter_new(gint width, gint height)
{
  FlxColorSpaceConverter *new = g_malloc(sizeof(FlxColorSpaceConverter));

  new->width = width;
  new->height = height;

  memset(new->palvec, 0, sizeof(new->palvec));  
  return new;
}

void
flx_colorspace_converter_destroy(FlxColorSpaceConverter *flxpal)
{
  g_return_if_fail(flxpal != NULL);

  g_free(flxpal);
}

void
flx_colorspace_convert(FlxColorSpaceConverter *flxpal, guchar *src, guchar *dest)
{
  guint size, col;

  g_return_if_fail(flxpal != NULL);
  g_return_if_fail(src != dest);


  size = flxpal->width * flxpal->height;

  while(size--) {
    col     = (*src++ * 3);
    *dest++ = flxpal->palvec[col+2];
    *dest++ = flxpal->palvec[col+1];
    *dest++ = flxpal->palvec[col];
    *dest++ = 0;
  }

}


void 
flx_set_palette_vector(FlxColorSpaceConverter *flxpal, guint start, guint num, guchar *newpal, gint scale)
{
  guint  grab;
  
  g_return_if_fail(flxpal != NULL);
  g_return_if_fail(start < 0x100);

  grab = ((start + num) > 0x100 ? 0x100 - start : num);

  if (scale) {
    gint i = 0;

    start *= 3;
    while (grab) {
      flxpal->palvec[start++] = newpal[i++] << scale;
      flxpal->palvec[start++] = newpal[i++] << scale;
      flxpal->palvec[start++] = newpal[i++] << scale;
      grab--;
    }
  }
  else {
    memcpy(&flxpal->palvec[start * 3], newpal, grab * 3);
  }

}

void
flx_set_color(FlxColorSpaceConverter *flxpal, guint colr, guint red, guint green, guint blue, gint scale)
{
  
  g_return_if_fail(flxpal != NULL);
  g_return_if_fail(colr < 0x100);

  flxpal->palvec[(colr * 3)]     = red << scale;
  flxpal->palvec[(colr * 3) + 1] = green << scale;
  flxpal->palvec[(colr * 3) + 2] = blue << scale;
}