mirror of https://github.com/GNOME/gimp.git
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/* The GIMP -- an 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 2 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <glib-object.h>
|
|
|
|
#include "core-types.h"
|
|
|
|
#include "base/gimphistogram.h"
|
|
#include "base/gimplut.h"
|
|
#include "base/lut-funcs.h"
|
|
#include "base/pixel-processor.h"
|
|
#include "base/pixel-region.h"
|
|
|
|
#include "config/gimpbaseconfig.h"
|
|
|
|
#include "gimp.h"
|
|
#include "gimpdrawable.h"
|
|
#include "gimpdrawable-equalize.h"
|
|
#include "gimpdrawable-histogram.h"
|
|
#include "gimpimage.h"
|
|
|
|
#include "gimp-intl.h"
|
|
|
|
|
|
void
|
|
gimp_drawable_equalize (GimpDrawable *drawable,
|
|
gboolean mask_only)
|
|
{
|
|
PixelRegion srcPR, destPR;
|
|
guchar *mask;
|
|
gint has_alpha;
|
|
gint alpha, bytes;
|
|
gint x1, y1, x2, y2;
|
|
GimpHistogram *hist;
|
|
GimpLut *lut;
|
|
GimpImage *gimage;
|
|
|
|
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
|
|
|
|
mask = NULL;
|
|
|
|
bytes = gimp_drawable_bytes (drawable);
|
|
has_alpha = gimp_drawable_has_alpha (drawable);
|
|
alpha = has_alpha ? (bytes - 1) : bytes;
|
|
|
|
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
|
|
|
|
hist = gimp_histogram_new (GIMP_BASE_CONFIG (gimage->gimp->config));
|
|
gimp_drawable_calculate_histogram (drawable, hist);
|
|
|
|
/* Build equalization LUT */
|
|
lut = eq_histogram_lut_new (hist, bytes);
|
|
|
|
/* Apply the histogram */
|
|
gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
|
|
|
|
pixel_region_init (&srcPR, gimp_drawable_data (drawable),
|
|
x1, y1, (x2 - x1), (y2 - y1), FALSE);
|
|
pixel_region_init (&destPR, gimp_drawable_shadow (drawable),
|
|
x1, y1, (x2 - x1), (y2 - y1), TRUE);
|
|
|
|
pixel_regions_process_parallel ((p_func) gimp_lut_process, lut,
|
|
2, &srcPR, &destPR);
|
|
|
|
gimp_lut_free (lut);
|
|
gimp_histogram_free (hist);
|
|
|
|
gimp_drawable_merge_shadow (drawable, TRUE, _("Equalize"));
|
|
|
|
gimp_drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
|
|
}
|