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9eaace417f
2004-01-13 Michael Natterer <mitch@gimp.org> * app/base/gimphistogram.[ch]: renamed gimp_histogram_nchannels() to gimp_histogram_n_channels(). * app/core/gimpdrawable-histogram.c: removed silly double negation logic. Cleanup. * app/widgets/gimphistogrameditor.c * app/widgets/gimphistogramview.c: adjust the GimpHistogramChannel for GRAYA images to make sure we pick alpha from the right slot. * app/tools/gimpcurvestool.c * app/tools/gimplevelstool.c: removed the same hack here and call gimp_histogram_view_set_channel() with the correct enum value. * tools/pdbgen/pdb/color.pdb (levels, curves, histogram): fiddle with enum values here too so GRAY* drawables produce the correct results. Fixed precondition checks and set "success" in a uniform way all over the place. Use gimp_drawable_calculate_histogram() instead of duplicating its code here. (started with a patch from Pedro Gimeno. Fixes bug #109078) * app/pdb/color_cmds.c: regenerated.
69 lines
2.1 KiB
C
69 lines
2.1 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@earthlink.net>
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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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gint off_x, off_y;
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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 (histogram != NULL);
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have_mask = gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
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pixel_region_init (®ion, gimp_drawable_data (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 *gimage;
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gimage = gimp_item_get_image (GIMP_ITEM (drawable));
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sel_mask = gimp_image_get_mask (gimage);
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gimp_item_offsets (GIMP_ITEM (drawable), &off_x, &off_y);
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pixel_region_init (&mask, gimp_drawable_data (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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