e969826cd3
Use gtk_rgb_to_hsv() instead of e_rgb_to_hsv(). Use gtk_hsv_to_rgb() instead of e_hsv_to_rgb().
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
|
|
/*
|
|
* e-hsv-utils.c - utilites for manipulating colors in HSV space
|
|
* Copyright (C) 1995-2001 Seth Nickell, Peter Mattis, Spencer Kimball and Josh MacDonald
|
|
*
|
|
* Authors:
|
|
* Seth Nickell <seth@eazel.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License, version 2, as published by the Free Software Foundation.
|
|
*
|
|
* 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 Library General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
* 02110-1301, USA.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include "e-hsv-utils.h"
|
|
|
|
/* tweak_hsv is a really tweaky function. it modifies its first argument, which
|
|
should be the color you want tweaked. delta_h, delta_s and delta_v specify
|
|
how much you want their respective channels modified (and in what direction).
|
|
if it can't do the specified modification, it does it in the oppositon direction */
|
|
void
|
|
e_hsv_tweak (GdkColor *color,
|
|
gdouble delta_h,
|
|
gdouble delta_s,
|
|
gdouble delta_v)
|
|
{
|
|
gdouble h, s, v, r, g, b;
|
|
|
|
r = color->red / 65535.0f;
|
|
g = color->green / 65535.0f;
|
|
b = color->blue / 65535.0f;
|
|
|
|
gtk_rgb_to_hsv (r, g, b, &h, &s, &v);
|
|
|
|
if (h + delta_h < 0) {
|
|
h -= delta_h;
|
|
} else {
|
|
h += delta_h;
|
|
}
|
|
|
|
if (s + delta_s < 0) {
|
|
s -= delta_s;
|
|
} else {
|
|
s += delta_s;
|
|
}
|
|
|
|
if (v + delta_v < 0) {
|
|
v -= delta_v;
|
|
} else {
|
|
v += delta_v;
|
|
}
|
|
|
|
gtk_hsv_to_rgb (h, s, v, &r, &g, &b);
|
|
|
|
color->red = r * 65535.0f;
|
|
color->green = g * 65535.0f;
|
|
color->blue = b * 65535.0f;
|
|
}
|
|
|