libgimpcolor/gimphsv.c

   1 /* LIBGIMP - The GIMP Library
   2  * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
   3  *
   4  * This library is free software: you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 3 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library.  If not, see
  16  * <https://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "config.h"
  20
  21 #include <glib-object.h>
  22
  23 #include "gimpcolortypes.h"
  24
  25 #include "gimphsv.h"
  26
  27
  28 /**
  29  * SECTION: gimphsv
  30  * @title: GimpHSV
  31  * @short_description: Definitions and Functions relating to HSV colors.
  32  *
  33  * Definitions and Functions relating to HSV colors.
  34  **/
  35
  36
  37 /*
  38  * GIMP_TYPE_HSV
  39  */
  40
  41 static GimpHSV * gimp_hsv_copy (const GimpHSV *hsv);
  42
  43
  44 GType
  45 gimp_hsv_get_type (void)
  46 {
  47   static GType hsv_type = 0;
  48
  49   if (!hsv_type)
  50     hsv_type = g_boxed_type_register_static ("GimpHSV",
  51                                               (GBoxedCopyFunc) gimp_hsv_copy,
  52                                               (GBoxedFreeFunc) g_free);
  53
  54   return hsv_type;
  55 }
  56
  57 static GimpHSV *
  58 gimp_hsv_copy (const GimpHSV *hsv)
  59 {
  60   return g_memdup (hsv, sizeof (GimpHSV));
  61 }
  62
  63
  64 /*  HSV functions  */
  65
  66 void
  67 gimp_hsv_set (GimpHSV *hsv,
  68               gdouble  h,
  69               gdouble  s,
  70               gdouble  v)
  71 {
  72   g_return_if_fail (hsv != NULL);
  73
  74   hsv->h = h;
  75   hsv->s = s;
  76   hsv->v = v;
  77 }
  78
  79 void
  80 gimp_hsv_clamp (GimpHSV *hsv)
  81 {
  82   g_return_if_fail (hsv != NULL);
  83
  84   hsv->h -= (gint) hsv->h;
  85
  86   if (hsv->h < 0)
  87     hsv->h += 1.0;
  88
  89   hsv->s = CLAMP (hsv->s, 0.0, 1.0);
  90   hsv->v = CLAMP (hsv->v, 0.0, 1.0);
  91   hsv->a = CLAMP (hsv->a, 0.0, 1.0);
  92 }
  93
  94 void
  95 gimp_hsva_set (GimpHSV *hsva,
  96                gdouble  h,
  97                gdouble  s,
  98                gdouble  v,
  99                gdouble  a)
 100 {
 101   g_return_if_fail (hsva != NULL);
 102
 103   hsva->h = h;
 104   hsva->s = s;
 105   hsva->v = v;
 106   hsva->a = a;
 107 }