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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimplut.h: 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_LUT_H__
#define __GIMP_LUT_H__
struct _GimpLut
{
guchar **luts;
gint nchannels;
};
/* TODO: the GimpLutFunc should really be passed the ColorModel of the
* region, not just the number of channels
*/
/* GimpLutFuncs should assume that the input and output gamma are 1.0
* and do no correction as this will be handled by gimp_lut_setup
*/
typedef gfloat (*GimpLutFunc) (gpointer user_data,
gint nchannels,
gint channel,
gfloat value);
GimpLut * gimp_lut_new (void);
void gimp_lut_free (GimpLut *lut);
void gimp_lut_setup (GimpLut *lut,
GimpLutFunc func,
gpointer user_data,
gint nchannels);
/* gimp_lut_setup_exact is currently identical to gimp_lut_setup. It
* however is guaranteed to never perform any interpolation or gamma
* correction on the lut
*/
void gimp_lut_setup_exact (GimpLut *lut,
GimpLutFunc func,
gpointer user_data,
gint nchannels);
void gimp_lut_process (GimpLut *lut,
PixelRegion *srcPR,
PixelRegion *destPR);
/* gimp_lut_process_inline is like gimp_lut_process except it uses a
* single PixelRegion as both the source and destination
*/
void gimp_lut_process_inline (GimpLut *lut,
PixelRegion *src_destPR);
/* gimp_lut_process_2 is the same as gimp_lut_process but the lut
* parameter is last instead of first. this is necesary because
* pixel_region_process_paralell sends the user_data as the 1st
* parameter, and the image_map functions send user_data as the last
* parameter
*/
void gimp_lut_process_2 (PixelRegion *srcPR,
PixelRegion *destPR,
GimpLut *lut);
#endif /* __GIMP_LUT_H__ */
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