/* 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.
 */
#ifndef __CURVES_H__
#define __CURVES_H__

#include <gtk/gtk.h>
#include "image_map.h"
#include "lut_funcs.h"
#include "tools.h"

#define SMOOTH       0
#define GFREE        1

typedef struct _CurvesDialog CurvesDialog;
struct _CurvesDialog
{
  GtkWidget *    shell;
  GtkWidget *    channel_menu;
  GtkWidget *    xrange;
  GtkWidget *    yrange;
  GtkWidget *    graph;
  GdkPixmap *    pixmap;
  GimpDrawable * drawable;
  ImageMap       image_map;
  int            color;
  int            channel;
  gint           preview;

  int            grab_point;
  int            last;
  int            leftmost;
  int            rightmost;
  int            curve_type;
  int            points[5][17][2];
  unsigned char  curve[5][256];
  int            col_value[5];

  GimpLut       *lut;
};

/*  hue-saturation functions  */
Tool *        tools_new_curves  (void);
void          tools_free_curves (Tool *);

void          curves_initialize (GDisplay *);
void          curves_free       (void);
float         curves_lut_func   (CurvesDialog *, int, int, float);
void          curves_calculate_curve         (CurvesDialog *);

#endif  /*  __CURVES_H__  */