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Viewing changes to app/base/levels.h

  • Committer: Bazaar Package Importer
  • Author(s): Daniel Holbach
  • Date: 2005-12-09 19:44:52 UTC
  • Revision ID: james.westby@ubuntu.com-20051209194452-yggpemjlofpjqyf4
Tags: upstream-2.2.9
Import upstream version 2.2.9

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app/base/levels.h
 
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/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
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 */
 
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#ifndef __LEVELS_H__
 
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#define __LEVELS_H__
 
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struct _Levels
 
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{
 
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  gdouble gamma[5];
 
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  gint    low_input[5];
 
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  gint    high_input[5];
 
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  gint    low_output[5];
 
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  gint    high_output[5];
 
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  guchar  input[5][256]; /* this is used only by the gui */
 
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};
 
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void     levels_init                (Levels               *levels);
 
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void     levels_channel_reset       (Levels               *levels,
 
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                                     GimpHistogramChannel  channel);
 
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void     levels_stretch             (Levels               *levels,
 
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                                     GimpHistogram        *hist,
 
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                                     gboolean              is_color);
 
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void     levels_channel_stretch     (Levels               *levels,
 
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                                     GimpHistogram        *hist,
 
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                                     GimpHistogramChannel  channel);
 
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void     levels_adjust_by_colors    (Levels               *levels,
 
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                                     GimpHistogramChannel  channel,
 
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                                     guchar               *black,
 
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                                     guchar               *gray,
 
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                                     guchar               *white);
 
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void     levels_calculate_transfers (Levels               *levels);
 
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gfloat   levels_lut_func            (Levels               *levels,
 
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                                     gint                  n_channels,
 
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                                     gint                  channel,
 
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                                     gfloat                value);
 
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#endif  /*  __LEVELS_H__  */