82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "core-types.h"
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#include "operations/pikalevelsconfig.h"
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#include "pikadrawable.h"
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#include "pikadrawable-histogram.h"
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#include "pikadrawable-levels.h"
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#include "pikadrawable-operation.h"
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#include "pikahistogram.h"
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#include "pikaprogress.h"
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#include "pika-intl.h"
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/* public functions */
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void
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pika_drawable_levels_stretch (PikaDrawable *drawable,
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PikaProgress *progress)
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{
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PikaLevelsConfig *config;
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PikaHistogram *histogram;
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GeglNode *levels;
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g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
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g_return_if_fail (pika_item_is_attached (PIKA_ITEM (drawable)));
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g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
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if (! pika_item_mask_intersect (PIKA_ITEM (drawable), NULL, NULL, NULL, NULL))
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return;
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config = g_object_new (PIKA_TYPE_LEVELS_CONFIG, NULL);
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histogram = pika_histogram_new (FALSE);
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pika_drawable_calculate_histogram (drawable, histogram, FALSE);
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pika_levels_config_stretch (config, histogram,
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pika_drawable_is_rgb (drawable));
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g_object_unref (histogram);
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levels = g_object_new (GEGL_TYPE_NODE,
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"operation", "pika:levels",
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NULL);
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gegl_node_set (levels,
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"config", config,
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NULL);
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pika_drawable_apply_operation (drawable, progress, _("Levels"),
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levels);
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g_object_unref (levels);
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g_object_unref (config);
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}
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