mirror of https://github.com/GNOME/gimp.git
81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GIMPCOLORSPACE_H__
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#define __GIMPCOLORSPACE_H__
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/* For information look into the C source or the html documentation */
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/* Color conversion routines */
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void gimp_rgb_to_hsv (gint *red /* returns hue */,
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gint *green /* returns saturation */,
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gint *blue /* returns value */);
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void gimp_hsv_to_rgb (gint *hue /* returns red */,
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gint *saturation /* returns green */,
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gint *value /* returns blue */);
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void gimp_rgb_to_hls (gint *red /* returns hue */,
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gint *green /* returns lightness */,
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gint *blue /* returns saturation */);
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gint gimp_rgb_to_l (gint red,
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gint green,
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gint blue);
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void gimp_hls_to_rgb (gint *hue /* returns red */,
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gint *lightness /* returns green */,
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gint *saturation /* returns blue */);
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void gimp_rgb_to_hsv_double (gdouble *red /* returns hue */,
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gdouble *green /* returns saturation */,
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gdouble *blue /* returns value */);
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void gimp_hsv_to_rgb_double (gdouble *hue /* returns red */,
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gdouble *saturation, /* returns green */
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gdouble *value /* returns blue */);
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void gimp_rgb_to_hsv4 (guchar *hsv,
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gdouble *red,
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gdouble *green,
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gdouble *blue);
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void gimp_hsv_to_rgb4 (guchar *rgb,
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gdouble hue,
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gdouble saturation,
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gdouble value);
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/* Map RGB to intensity */
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#define INTENSITY_RED 0.30
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#define INTENSITY_GREEN 0.59
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#define INTENSITY_BLUE 0.11
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#define INTENSITY(r,g,b) ((r) * INTENSITY_RED + \
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(g) * INTENSITY_GREEN + \
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(b) * INTENSITY_BLUE + 0.001)
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GIMPCOLORSPACE_H__ */
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