PIKApp/libpikacolor/pikahsv.c

97 lines
2.0 KiB
C

/* LIBPIKA - The PIKA 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 3 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, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <glib-object.h>
#include "pikacolortypes.h"
#include "pikahsv.h"
/**
* SECTION: pikahsv
* @title: PikaHSV
* @short_description: Definitions and Functions relating to HSV colors.
*
* Definitions and Functions relating to HSV colors.
**/
/*
* PIKA_TYPE_HSV
*/
static PikaHSV * pika_hsv_copy (const PikaHSV *hsv);
G_DEFINE_BOXED_TYPE (PikaHSV, pika_hsv, pika_hsv_copy, g_free)
static PikaHSV *
pika_hsv_copy (const PikaHSV *hsv)
{
return g_memdup2 (hsv, sizeof (PikaHSV));
}
/* HSV functions */
void
pika_hsv_set (PikaHSV *hsv,
gdouble h,
gdouble s,
gdouble v)
{
g_return_if_fail (hsv != NULL);
hsv->h = h;
hsv->s = s;
hsv->v = v;
}
void
pika_hsv_clamp (PikaHSV *hsv)
{
g_return_if_fail (hsv != NULL);
hsv->h -= (gint) hsv->h;
if (hsv->h < 0)
hsv->h += 1.0;
hsv->s = CLAMP (hsv->s, 0.0, 1.0);
hsv->v = CLAMP (hsv->v, 0.0, 1.0);
hsv->a = CLAMP (hsv->a, 0.0, 1.0);
}
void
pika_hsva_set (PikaHSV *hsva,
gdouble h,
gdouble s,
gdouble v,
gdouble a)
{
g_return_if_fail (hsva != NULL);
hsva->h = h;
hsva->s = s;
hsva->v = v;
hsva->a = a;
}