/* 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 .
*
* Copyright 2006, 2010 Øyvind Kolås
*/
#include "config.h"
#include
#ifdef GEGL_PROPERTIES
property_double (std_dev, _("Radius"), 3.0)
description(_("Expressed as standard deviation, in pixels"))
value_range (0.0, 1500)
ui_range (0.0, 40.0)
ui_gamma (3.0)
ui_meta ("unit", "pixel-distance")
property_double (scale, _("Amount"), 0.5)
description(_("Scaling factor for unsharp-mask, the strength of effect"))
value_range (0.0, 300.0)
ui_range (0.0, 10.0)
ui_gamma (3.0)
property_double (threshold, _("Threshold"), 0.0)
value_range (0.0, 1.0)
ui_range (0.0, 1.0)
ui_gamma (1.0)
#else
#define GEGL_OP_META
#define GEGL_OP_NAME unsharp_mask
#define GEGL_OP_C_SOURCE unsharp-mask.c
#include "gegl-op.h"
typedef struct
{
GeglNode *aa;
GeglNode *absolute;
GeglNode *subtract;
GeglNode *multiply_mask;
GeglNode *multiply;
} State;
static void
update_graph (GeglOperation *operation)
{
GeglProperties *o = GEGL_PROPERTIES (operation);
State *state = o->user_data;
if (o->threshold > 0.0001)
{
gegl_node_connect(state->absolute, "input", state->subtract, "output");
gegl_node_connect(state->multiply, "input", state->multiply_mask, "output");
}
else
{
gegl_node_connect (state->multiply, "input", state->subtract, "output");
}
}
static void
attach (GeglOperation *operation)
{
GeglProperties *o = GEGL_PROPERTIES (operation);
GeglNode *gegl, *input, *output, *add, *multiply, *subtract, *blur, *multiply2, *absolute, *threshold, *aa, *multiply_mask;
State *state = g_malloc0 (sizeof (State));
o->user_data = state;
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);
multiply_mask = gegl_node_new_child (gegl, "operation", "gegl:multiply", NULL);
multiply2 = gegl_node_new_child (gegl, "operation", "gegl:multiply", "value", 2.0f, NULL);
subtract = gegl_node_new_child (gegl, "operation", "gegl:subtract", NULL);
absolute = gegl_node_new_child (gegl, "operation", "gegl:abs", NULL);
threshold = gegl_node_new_child (gegl, "operation", "gegl:threshold", NULL);
aa = gegl_node_new_child (gegl, "operation", "gegl:gaussian-blur", "std-dev-x", 1.0, "std-dev-y", 1.0, NULL);
blur = gegl_node_new_child (gegl, "operation", "gegl:gaussian-blur", NULL);
state->aa = aa;
state->absolute = absolute;
state->subtract = subtract;
state->multiply = multiply;
state->multiply_mask = multiply_mask;
gegl_node_link_many (input, subtract, multiply_mask, multiply, NULL);
gegl_node_link (input, blur);
gegl_node_link_many (multiply, add, output, NULL);
gegl_node_link_many (subtract, absolute, multiply2, threshold, aa, NULL);
gegl_node_connect (multiply_mask, "aux", aa, "output");
gegl_node_connect (subtract, "aux", blur, "output");
gegl_node_connect (add, "aux", input, "output");
gegl_operation_meta_redirect (operation, "threshold", threshold, "value");
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
dispose (GObject *object)
{
GeglProperties *o = GEGL_PROPERTIES (object);
g_clear_pointer (&o->user_data, g_free);
G_OBJECT_CLASS (gegl_op_parent_class)->dispose (object);
}
static void
gegl_op_class_init (GeglOpClass *klass)
{
GObjectClass *object_class;
GeglOperationClass *operation_class;
GeglOperationMetaClass *operation_meta_class;
object_class = G_OBJECT_CLASS (klass);
operation_class = GEGL_OPERATION_CLASS (klass);
operation_meta_class = GEGL_OPERATION_META_CLASS (klass);
object_class->dispose = dispose;
operation_class->attach = attach;
operation_meta_class->update = update_graph;
gegl_operation_class_set_keys (operation_class,
"name", "gegl:unsharp-mask",
"title", _("Sharpen (Unsharp Mask)"),
"categories", "enhance:sharpen",
"reference-hash", "5f94a8d1b946c82b1f066f50b9648a5a",
"reference-hashB", "928da4281a4167d6349e7277ce72ff62",
"description", _("Sharpen image, by adding difference to blurred image, a technique for sharpening originally used in darkrooms."),
NULL);
}
#endif