/* 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 2010 Martin Nordholts <martinn@src.gnome.org>

 */

#include "config.h"

#include <glib/gi18n-lib.h>

#ifdef GEGL_CHANT_PROPERTIES

gegl_chant_file_path (path, _("File"), "/tmp/gegl-buffer.gegl", _("Path of GeglBuffer file to load."))

#else

#define GEGL_CHANT_TYPE_SOURCE

#define GEGL_CHANT_C_FILE       "gegl-buffer-load-op.c"

#include "gegl-chant.h"

static void

gegl_buffer_load_op_ensure_buffer (GeglChantO *o)

{

  if (!o->chant_data)

    o->chant_data = gegl_buffer_load (o->path);

}

static GeglRectangle

gegl_buffer_load_op_get_bounding_box (GeglOperation *operation)

{

  GeglRectangle  result = { 0, 0, 0, 0 };

  GeglChantO    *o      = GEGL_CHANT_PROPERTIES (operation);

  gegl_buffer_load_op_ensure_buffer (o);

  if (o->chant_data)

    {

      result.width  = gegl_buffer_get_width  (GEGL_BUFFER (o->chant_data));

      result.height = gegl_buffer_get_height (GEGL_BUFFER (o->chant_data));

    }

  return result;

}

static gboolean

gegl_buffer_load_op_process (GeglOperation        *operation,

                             GeglOperationContext *context,

                             const gchar          *output_pad,

                             const GeglRectangle  *result,

                             gint                  level)

{

  GeglChantO *o = GEGL_CHANT_PROPERTIES (operation);

  gegl_buffer_load_op_ensure_buffer (o);

  gegl_operation_context_take_object (context, output_pad, o->chant_data);

  o->chant_data = NULL;

  return TRUE;

}

static void

gegl_chant_class_init (GeglChantClass *klass)

{

  GeglOperationClass *operation_class;

  operation_class = GEGL_OPERATION_CLASS (klass);

  operation_class->process          = gegl_buffer_load_op_process;

  operation_class->get_bounding_box = gegl_buffer_load_op_get_bounding_box;

  gegl_operation_class_set_keys (operation_class,

    "name"       , "gegl:gegl-buffer-load",

    "categories" , "hidden",

    "description", _("GeglBuffer file loader."),

    NULL);

  gegl_extension_handler_register (".gegl", "gegl:gegl-buffer-load");

}

#endif