/* 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
gegl_chant_double_ui (radius1, _("Radius 1"), 0.0, 1000.0, 1.0, 0.0, 10.0, 1.5,
_("Radius"))
gegl_chant_double_ui (radius2, _("Radius 2"), 0.0, 1000.0, 2.0, 0.0, 10.0, 1.5,
_("Radius"))
#else
#define GEGL_CHANT_TYPE_META
#define GEGL_CHANT_C_FILE "difference-of-gaussians.c"
#include "gegl-chant.h"
typedef struct _Priv Priv;
struct _Priv
{
GeglNode *self;
GeglNode *input;
GeglNode *output;
GeglNode *multiply;
GeglNode *subtract;
GeglNode *blur1;
GeglNode *blur2;
};
static void attach (GeglOperation *operation)
{
GeglChantO *o = GEGL_CHANT_PROPERTIES (operation);
Priv *priv = g_new0 (Priv, 1);
o->chant_data = (void*) priv;
if (!priv->blur1)
{
GeglNode *gegl;
gegl = operation->node;
priv->input = gegl_node_get_input_proxy (gegl, "input");
priv->output = gegl_node_get_output_proxy (gegl, "output");
priv->subtract = gegl_node_new_child (gegl,
"operation", "gegl:subtract",
NULL);
priv->blur1 = gegl_node_new_child (gegl,
"operation", "gegl:gaussian-blur",
NULL);
priv->blur2 = gegl_node_new_child (gegl,
"operation", "gegl:gaussian-blur",
NULL);
gegl_node_link_many (priv->input, priv->blur1, priv->subtract, priv->output, NULL);
gegl_node_link (priv->input, priv->blur2);
gegl_node_connect_from (priv->subtract, "aux", priv->blur2, "output");
gegl_operation_meta_redirect (operation, "radius1", priv->blur1, "std-dev-x");
gegl_operation_meta_redirect (operation, "radius1", priv->blur1, "std-dev-y");
gegl_operation_meta_redirect (operation, "radius2", priv->blur2, "std-dev-x");
gegl_operation_meta_redirect (operation, "radius2", priv->blur2, "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:difference-of-gaussians",
"categories" , "meta:edge",
"description",
_("Does an edge detection based on the difference of two gaussian blurs."),
NULL);
}
#endif