mirror of https://github.com/GNOME/gimp.git
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/* The GIMP -- an image manipulation program
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <glib-object.h>
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#include "core-types.h"
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#include "base/gimphistogram.h"
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#include "base/gimplut.h"
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#include "base/lut-funcs.h"
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#include "base/pixel-processor.h"
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#include "base/pixel-region.h"
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#include "config/gimpbaseconfig.h"
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#include "gimp.h"
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#include "gimpdrawable.h"
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#include "gimpdrawable-equalize.h"
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#include "gimpdrawable-histogram.h"
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#include "gimpimage.h"
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#include "gimp-intl.h"
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void
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gimp_drawable_equalize (GimpDrawable *drawable,
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gboolean mask_only)
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{
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PixelRegion srcPR, destPR;
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gint bytes;
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gint x, y, width, height;
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GimpHistogram *hist;
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GimpLut *lut;
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GimpImage *gimage;
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
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gimage = gimp_item_get_image (GIMP_ITEM (drawable));
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bytes = gimp_drawable_bytes (drawable);
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if (! gimp_drawable_mask_intersect (drawable, &x, &y, &width, &height))
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return;
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hist = gimp_histogram_new (GIMP_BASE_CONFIG (gimage->gimp->config));
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gimp_drawable_calculate_histogram (drawable, hist);
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/* Build equalization LUT */
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lut = eq_histogram_lut_new (hist, bytes);
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/* Apply the histogram */
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pixel_region_init (&srcPR, gimp_drawable_data (drawable),
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x, y, width, height, FALSE);
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pixel_region_init (&destPR, gimp_drawable_shadow (drawable),
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x, y, width, height, TRUE);
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pixel_regions_process_parallel ((p_func) gimp_lut_process, lut,
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2, &srcPR, &destPR);
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gimp_lut_free (lut);
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gimp_histogram_free (hist);
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gimp_drawable_merge_shadow (drawable, TRUE, _("Equalize"));
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gimp_drawable_update (drawable, x, y, width, height);
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}
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