/* This file is an image processing operation for GEGL

 *

 * GEGL is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 3 of the License, or (at your option) any later version.

 *

 * GEGL 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with GEGL; if not, see <http://www.gnu.org/licenses/>.

 *

 * Copyright 2006 Øyvind Kolås <pippin@gimp.org>

 */

#include "config.h"

#include <glib/gi18n-lib.h>

#ifdef GEGL_CHANT_PROPERTIES

   /* no properties */

#else

#define GEGL_CHANT_TYPE_FILTER

#define GEGL_CHANT_C_FILE       "nop.c"

#include "gegl-chant.h"

static gboolean

gegl_nop_process (GeglOperation        *operation,

                  GeglOperationContext *context,

                  const gchar          *output_prop,

                  const GeglRectangle  *result,

                  gint                  level)

{

  GeglBuffer *input;

  if (strcmp (output_prop, "output"))

    {

      g_warning ("requested processing of %s pad on a nop", output_prop);

      return FALSE;

    }

  input = GEGL_BUFFER (gegl_operation_context_get_object (context, "input"));

  if (!input)

    {

      g_warning ("nop received NULL input");

      return FALSE;

    }

  gegl_operation_context_take_object (context, "output", g_object_ref (G_OBJECT (input)));

  return TRUE;

}

static void

gegl_chant_class_init (GeglChantClass *klass)

{

  GeglOperationClass *operation_class;

  operation_class = GEGL_OPERATION_CLASS (klass);

  operation_class->process = gegl_nop_process;

  gegl_operation_class_set_keys (operation_class,

              "name",        "gegl:nop",

              "categories",  "core",

              "description", _("No operation (can be used as a routing point)"),

              NULL);

}

#endif