mirror of https://github.com/GNOME/gimp.git
59 lines
2.3 KiB
C
59 lines
2.3 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., 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_auto (Levels *levels,
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GimpHistogram *hist,
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gboolean is_color);
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void levels_channel_auto (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__ */
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