/* 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., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#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);

#if G_BYTE_ORDER == G_BIG_ENDIAN

    *dest++ = 0;

    *dest++ = flxpal->palvec[col];

    *dest++ = flxpal->palvec[col + 1];

    *dest++ = flxpal->palvec[col + 2];

#else

    *dest++ = flxpal->palvec[col + 2];

    *dest++ = flxpal->palvec[col + 1];

    *dest++ = flxpal->palvec[col];

    *dest++ = 0;

#endif

  }

}

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;

}