gimpcolor.h 3.49 KB
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/* LIBGIMP - The GIMP Library 
 * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball                
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 * 
 * This library 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  
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef __GIMP_COLOR_H__
#define __GIMP_COLOR_H__

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/* For information look into the C source or the html documentation */


/*  RGB and RGBA color types and operations taken from LibGCK  */

typedef struct _GimpRGB GimpRGB;

struct _GimpRGB
{
  gdouble r, g, b, a;
};


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void      gimp_rgb_set        (GimpRGB       *rgb,
			       gdouble        r,
			       gdouble        g,
			       gdouble        b);
void      gimp_rgb_set_uchar  (GimpRGB       *rgb,
			       guchar         r,
			       guchar         g,
			       guchar         b);
void      gimp_rgb_get_uchar  (const GimpRGB *rgb,
			       guchar        *r,
			       guchar        *g,
			       guchar        *b);

void      gimp_rgb_add        (GimpRGB       *rgb1,
			       const GimpRGB *rgb2);
void      gimp_rgb_subtract   (GimpRGB       *rgb1,
			       const GimpRGB *rgb2);
void      gimp_rgb_multiply   (GimpRGB       *rgb1,
			       gdouble        factor);
gdouble   gimp_rgb_distance   (const GimpRGB *rgb1,
			       const GimpRGB *rgb2);
gdouble   gimp_rgb_max        (const GimpRGB *rgb);
gdouble   gimp_rgb_min        (const GimpRGB *rgb);
void      gimp_rgb_clamp      (GimpRGB       *rgb);
void      gimp_rgb_gamma      (GimpRGB       *rgb,
 			       gdouble        gamma);
gdouble   gimp_rgb_intensity  (const GimpRGB *rgb);


void      gimp_rgba_set       (GimpRGB       *rgba,
			       gdouble        r,
			       gdouble        g,
			       gdouble        b,
			       gdouble        a);
void      gimp_rgba_set_uchar (GimpRGB       *rgba,
			       guchar         r,
			       guchar         g,
			       guchar         b,
			       guchar         a);
void      gimp_rgba_get_uchar (const GimpRGB *rgba,
			       guchar        *r,
			       guchar        *g,
			       guchar        *b,
			       guchar        *a);

void      gimp_rgba_add       (GimpRGB       *rgba1,
			       const GimpRGB *rgba2);
void      gimp_rgba_subtract  (GimpRGB       *rgba1,
			       const GimpRGB *rgba2);
void      gimp_rgba_multiply  (GimpRGB       *rgba,
			       gdouble        factor);
gdouble   gimp_rgba_distance  (const GimpRGB *rgba1, 
			       const GimpRGB *rgba2);
gdouble   gimp_rgba_max       (const GimpRGB *rgba);
gdouble   gimp_rgba_min       (const GimpRGB *rgba);
void      gimp_rgba_clamp     (GimpRGB       *rgba);
void      gimp_rgba_gamma     (GimpRGB       *rgba,
			       gdouble        gamma);


  /*  These will become the default one day  */

gboolean  gimp_palette_set_foreground_rgb (const GimpRGB *rgb);
gboolean  gimp_palette_get_foreground_rgb (GimpRGB       *rgb);
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#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif  /* __GIMP_COLOR_H__ */