mirror of https://github.com/GNOME/gimp.git
61 lines
1.9 KiB
C
61 lines
1.9 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __HISTOGRAM_H__
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#define __HISTOGRAM_H__
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#include "pixel_region.h"
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#define HISTOGRAM_VALUE 0
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#define HISTOGRAM_RED 1
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#define HISTOGRAM_GREEN 2
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#define HISTOGRAM_BLUE 3
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#define HISTOGRAM_ALPHA 4
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/* Histogram information function */
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typedef struct _Histogram Histogram;
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struct _Histogram
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{
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/* The calling procedure is responsible for showing this widget */
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GtkWidget *histogram_widget;
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/* Don't touch this :) */
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void * private_part;
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};
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typedef double Values[256];
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typedef Values HistogramValues[5];
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typedef void (* HistogramInfoFunc) (PixelRegion *, PixelRegion *, HistogramValues, void *);
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typedef void (* HistogramRangeCallback) (int, int, HistogramValues, void *);
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/* Histogram functions */
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Histogram * histogram_create (int, int, HistogramRangeCallback, void *);
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void histogram_free (Histogram *);
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void histogram_update (Histogram *, GimpDrawable *, HistogramInfoFunc, void *);
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void histogram_range (Histogram *, int, int);
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void histogram_channel (Histogram *, int);
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HistogramValues *histogram_values (Histogram *);
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#endif /* __HISTOGRAM_H__ */
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