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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "core-types.h"
#include "operations/gimplevelsconfig.h"
#include "gimpdrawable.h"
#include "gimpdrawable-histogram.h"
#include "gimpdrawable-levels.h"
#include "gimpdrawable-operation.h"
#include "gimphistogram.h"
#include "gimpprogress.h"
#include "gimp-intl.h"
/* public functions */
void
gimp_drawable_levels_stretch (GimpDrawable *drawable,
GimpProgress *progress)
{
GimpLevelsConfig *config;
GimpHistogram *histogram;
GeglNode *levels;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
if (! gimp_item_mask_intersect (GIMP_ITEM (drawable), NULL, NULL, NULL, NULL))
return;
config = g_object_new (GIMP_TYPE_LEVELS_CONFIG, NULL);
histogram = gimp_histogram_new (FALSE);
gimp_drawable_calculate_histogram (drawable, histogram, FALSE);
gimp_levels_config_stretch (config, histogram,
gimp_drawable_is_rgb (drawable));
g_object_unref (histogram);
levels = g_object_new (GEGL_TYPE_NODE,
"operation", "gimp:levels",
NULL);
gegl_node_set (levels,
"config", config,
NULL);
gimp_drawable_apply_operation (drawable, progress, _("Levels"),
levels);
g_object_unref (levels);
g_object_unref (config);
}
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