/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * gimphistogram module Copyright (C) 1999 Jay Cox <jaycox@earthlink.net>
 *
 * 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.
 */

#ifndef __GIMP_HISTOGRAM_H__
#define __GIMP_HISTOGRAM_H__


typedef enum
{
  GIMP_HISTOGRAM_VALUE = 0,
  GIMP_HISTOGRAM_RED   = 1,
  GIMP_HISTOGRAM_GREEN = 2,
  GIMP_HISTOGRAM_BLUE  = 3,
  GIMP_HISTOGRAM_ALPHA = 4
} GimpHistogramChannel;


GimpHistogram * gimp_histogram_new             (void);
void            gimp_histogram_free            (GimpHistogram        *histogram);
void            gimp_histogram_calculate       (GimpHistogram        *historgam, 
						PixelRegion          *region,
						PixelRegion          *mask);
void            gimp_histogram_calculate_drawable (GimpHistogram     *histogram, 
						   GimpDrawable      *drawable);
gdouble         gimp_histogram_get_maximum     (GimpHistogram        *histogram,
						GimpHistogramChannel  channel);
gdouble         gimp_histogram_get_count       (GimpHistogram        *histogram,
						gint                  start,
						gint                  end);
gdouble         gimp_histogram_get_mean        (GimpHistogram        *histogram,
						GimpHistogramChannel  channel,
						gint                  start,
						gint                  end);
gint            gimp_histogram_get_median      (GimpHistogram        *histogram,
						GimpHistogramChannel  channel,
						gint                  start,
						gint                  end);
gdouble         gimp_histogram_get_std_dev     (GimpHistogram        *histogram,
						GimpHistogramChannel  channel,
						gint                  start,
						gint                  end);
gdouble         gimp_histogram_get_value       (GimpHistogram        *histogram,
						GimpHistogramChannel  channel,
						gint                  bin);
gdouble         gimp_histogram_get_channel     (GimpHistogram        *histogram,
						GimpHistogramChannel  channel,
						gint                  bin);
gint            gimp_histogram_nchannels       (GimpHistogram        *histogram);


#endif /* __GIMP_HISTOGRAM_H__ */