/* GStreamer

 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>

 *

 * 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 "gstmask.h"

#include "paint.h"

static GList *masks = NULL;

void

_gst_mask_init (void)

{

  _gst_barboxwipes_register ();

}

static gint

gst_mask_compare (GstMaskDefinition * def1, GstMaskDefinition * def2)

{

  return (def1->type - def2->type);

}

void

_gst_mask_register (const GstMaskDefinition * definition)

{

  masks =

      g_list_insert_sorted (masks, (gpointer) definition,

      (GCompareFunc) gst_mask_compare);

}

const GList *

gst_mask_get_definitions (void)

{

  return masks;

}

static GstMaskDefinition *

gst_mask_find_definition (gint type)

{

  GList *walk = masks;

  while (walk) {

    GstMaskDefinition *def = (GstMaskDefinition *) walk->data;

    if (def->type == type)

      return def;

    walk = g_list_next (walk);

  }

  return NULL;

}

GstMask *

gst_mask_factory_new (gint type, gboolean invert, gint bpp, gint width,

    gint height)

{

  GstMaskDefinition *definition;

  GstMask *mask = NULL;

  definition = gst_mask_find_definition (type);

  if (definition) {

    mask = g_new0 (GstMask, 1);

    mask->type = definition->type;

    mask->bpp = bpp;

    mask->width = width;

    mask->height = height;

    mask->destroy_func = definition->destroy_func;

    mask->user_data = definition->user_data;

    mask->data = g_malloc (width * height * sizeof (guint32));

    definition->draw_func (mask);

    if (invert) {

      gint i, j;

      guint32 *datap = mask->data;

      guint32 max = (1 << bpp);

      for (i = 0; i < height; i++) {

        for (j = 0; j < width; j++) {

          *datap = max - *datap;

          datap++;

        }

      }

    }

  }

  return mask;

}

void

_gst_mask_default_destroy (GstMask * mask)

{

  g_free (mask->data);

  g_free (mask);

}

void

gst_mask_destroy (GstMask * mask)

{

  if (mask->destroy_func)

    mask->destroy_func (mask);

}