/* 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, 2010 Øyvind Kolås <pippin@gimp.org>

 */

#include "config.h"

#include <glib/gi18n-lib.h>

#ifdef GEGL_CHANT_PROPERTIES

gegl_chant_double_ui (std_dev, _("Std. Dev."), 0.0, 500.0, 1.0, 0.0, 200.0, 1.5,

                  _("Standard deviation (spatial scale factor)"))

gegl_chant_double_ui (scale,  _("Scale"), 0.0, 100.0, 1.0, 0.0, 100.0, 1.5,

                  _("Scale, strength of effect"))

#else

#define GEGL_CHANT_TYPE_META

#define GEGL_CHANT_C_FILE       "unsharp-mask.c"

#include "gegl-chant.h"

static void attach (GeglOperation *operation)

{

  GeglNode *gegl, *input, *output, *add, *multiply, *subtract, *blur;

  gegl = operation->node;

  input    = gegl_node_get_input_proxy (gegl, "input");

  output   = gegl_node_get_output_proxy (gegl, "output");

  add      = gegl_node_new_child (gegl, "operation", "gegl:add", NULL);

  multiply = gegl_node_new_child (gegl, "operation", "gegl:multiply", NULL);

  subtract = gegl_node_new_child (gegl, "operation", "gegl:subtract", NULL);

  blur     = gegl_node_new_child (gegl, "operation", "gegl:gaussian-blur",NULL);

  gegl_node_link_many (input, subtract, multiply, NULL);

  gegl_node_link (input, blur);

  gegl_node_link_many (multiply, add, output, NULL);

  gegl_node_connect_from (subtract, "aux",   blur,     "output");

  gegl_node_connect_from (add,      "aux",   input, "output");

  gegl_operation_meta_redirect (operation, "scale", multiply, "value");

  gegl_operation_meta_redirect (operation, "std-dev", blur, "std-dev-x");

  gegl_operation_meta_redirect (operation, "std-dev", blur, "std-dev-y");

}

static void

gegl_chant_class_init (GeglChantClass *klass)

{

  GeglOperationClass *operation_class;

  operation_class = GEGL_OPERATION_CLASS (klass);

  operation_class->attach = attach;

  gegl_operation_class_set_keys (operation_class,

  "name"       , "gegl:unsharp-mask",

  "categories" , "meta:enhance",

  "description",

        _("Performs an unsharp mask on the input buffer (sharpens an image by "

          "adding false mach-bands around edges)"),

        NULL);

}

#endif