/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: Util.java
*
* Copyright (c) 2009 Sun Microsystems and Static Free Software
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.tool.user.ui;
import java.awt.*;
import javax.swing.*;
import java.util.*;
/**
* Utility functions for the user interface
*/
public class Util {
//
// AWT doesn't include HSV<->RGB colorspace conversions. Nuts, huh?
//
public static Color colorFromHSV(float h, float s, float v) {
float r=0, g=0, b=0;
float var_h = h * 6;
float var_i = (float)Math.floor( var_h );
float var_1 = v * ( 1 - s );
float var_2 = v * ( 1 - s * ( var_h - var_i ) );
float var_3 = v * ( 1 - s * ( 1 - ( var_h - var_i ) ) );
if ( var_i == 0 ) { r = v ; g = var_3 ; b = var_1; }
else if ( var_i == 1 ) { r = var_2 ; g = v ; b = var_1; }
else if ( var_i == 2 ) { r = var_1 ; g = v ; b = var_3; }
else if ( var_i == 3 ) { r = var_1 ; g = var_2 ; b = v; }
else if ( var_i == 4 ) { r = var_3 ; g = var_1 ; b = v; }
else { r = v ; g = var_1 ; b = var_2; }
return new Color(r, g, b);
}
public static float hueFromColor(Color c) {
double r = c.getRed() / 255.;
double g = c.getGreen() / 255.;
double b = c.getBlue() / 255.;
double min, max;
min = Math.min(r, Math.min(g, b));
max = Math.max(r, Math.max(g, b));
double v = max;
double h = 0;
if (v == 0) return (float)h;
r /= v;
g /= v;
b /= v;
min = Math.min(r, Math.min(g, b));
max = Math.max(r, Math.max(g, b));
double s = max - min;
if (s == 0) { h = 0; return (float)h; }
r = (r - min)/s;
g = (g - min)/s;
b = (b - min)/s;
min = Math.min(r, Math.min(g, b));
max = Math.max(r, Math.max(g, b));
if (max == r) {
h = 0.0 + (60./360.)*(g - b);
if (h < 0.0) h += 1;
} else if (max == g) {
h = (120./360.) + (60./360.)*(b - r);
} else /* max == b */ {
h = (240./360.) + (60./360.)*(r - g);
}
return (float)h;
}
}