gimp/libgimp/gimpcolorspace.h

69 lines
2.5 KiB
C

/* 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 __GIMPCOLORSPACE_H__
#define __GIMPCOLORSPACE_H__
/* Color conversion routines */
void gimp_rgb_to_hsv (gint *red /* returns hue */,
gint *green /* returns saturation */,
gint *blue /* returns value */);
void gimp_hsv_to_rgb (gint *hue /* returns red */,
gint *saturation /* returns green */,
gint *value /* returns blue */);
void gimp_rgb_to_hls (gint *red /* returns hue */,
gint *green /* returns lightness */,
gint *blue /* returns saturation */);
gint gimp_rgb_to_l (gint red,
gint green,
gint blue);
void gimp_hls_to_rgb (gint *hue /* returns red */,
gint *lightness /* returns green */,
gint *saturation /* returns blue */);
void gimp_rgb_to_hsv_double (gdouble *red /* returns hue */,
gdouble *green /* returns saturation */,
gdouble *blue /* returns value */);
void gimp_hsv_to_rgb_double (gdouble *hue /* returns red */,
gdouble *saturation, /* returns green */
gdouble *value /* returns blue */);
void gimp_rgb_to_hsv4 (guchar *hsv,
gdouble *red,
gdouble *green,
gdouble *blue);
void gimp_hsv_to_rgb4 (guchar *rgb,
gdouble hue,
gdouble saturation,
gdouble value);
/* Map RGB to intensity */
#define INTENSITY_RED 0.30
#define INTENSITY_GREEN 0.59
#define INTENSITY_BLUE 0.11
#define INTENSITY(r,g,b) ((r) * INTENSITY_RED + \
(g) * INTENSITY_GREEN + \
(b) * INTENSITY_BLUE + 0.001)
#endif /* __GIMPCOLORSPACE_H__ */