mirror of https://github.com/GNOME/gimp.git
75 lines
2.3 KiB
C
75 lines
2.3 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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* gimphistogram module Copyright (C) 1999 Jay Cox <jaycox@gimp.org>
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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/pixel-region.h"
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#include "gimpdrawable.h"
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#include "gimpimage.h"
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void
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gimp_drawable_calculate_histogram (GimpDrawable *drawable,
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GimpHistogram *histogram)
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{
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PixelRegion region;
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PixelRegion mask;
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gint x1, y1, x2, y2;
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gboolean have_mask;
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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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g_return_if_fail (histogram != NULL);
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have_mask = gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
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if ((x1 == x2) || (y1 == y2))
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return;
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pixel_region_init (®ion, gimp_drawable_get_tiles (drawable),
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x1, y1, (x2 - x1), (y2 - y1), FALSE);
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if (have_mask)
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{
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GimpChannel *sel_mask;
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GimpImage *image;
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gint off_x, off_y;
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image = gimp_item_get_image (GIMP_ITEM (drawable));
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sel_mask = gimp_image_get_mask (image);
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gimp_item_offsets (GIMP_ITEM (drawable), &off_x, &off_y);
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pixel_region_init (&mask,
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gimp_drawable_get_tiles (GIMP_DRAWABLE (sel_mask)),
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x1 + off_x, y1 + off_y, (x2 - x1), (y2 - y1), FALSE);
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gimp_histogram_calculate (histogram, ®ion, &mask);
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}
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else
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{
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gimp_histogram_calculate (histogram, ®ion, NULL);
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}
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}
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