- /*
- * @(#)GTKColorType.java 1.8 03/12/19
- *
- * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
- * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
- */
- package com.sun.java.swing.plaf.gtk;
-
- import javax.swing.plaf.synth.ColorType;
- import java.awt.Color;
- import javax.swing.plaf.ColorUIResource;
-
- /**
- * @version 1.8, 12/19/03
- * @author Scott Violet
- */
- public class GTKColorType extends ColorType {
- // GTK allows you to specify the foreground and background in a
- // gtkrc, the rest (dark, mid, light) are calculated from these
- // values.
- public static final ColorType LIGHT = new GTKColorType("Light");
- public static final ColorType DARK = new GTKColorType("Dark");
- public static final ColorType MID = new GTKColorType("Mid");
- public static final ColorType BLACK = new GTKColorType("Black");
- public static final ColorType WHITE = new GTKColorType("White");
-
- public static final int MAX_COUNT;
-
- private static final float[] HLS_COLORS = new float[3];
- private static final Object HLS_COLOR_LOCK = new Object();
-
- static {
- MAX_COUNT = WHITE.getID() + 1;
- }
-
- private static int hlsToRGB(float h, float l, float s) {
- float m2 = (l <= .5f) ? (l * (1 + s)) : (l + s - l * s);
- float m1 = 2.0f * l - m2;
- float r, g, b;
-
- if (s == 0.0) {
- if (h == 0.0) {
- r = g = b = l;
- }
- else {
- r = g = b = 0;
- }
- }
- else {
- r = hlsValue(m1, m2, h + 120);
- g = hlsValue(m1, m2, h);
- b = hlsValue(m1, m2, h - 120);
- }
- return (((int)(r * 255)) << 16) | (((int)(g * 255.0)) << 8) |
- ((int)(b * 255));
- }
-
- private static float hlsValue(float n1, float n2, float h) {
- if (h > 360) {
- h -= 360;
- }
- else if (h < 0) {
- h += 360;
- }
- if (h < 60) {
- return n1 + (n2 - n1) * h / 60.0f;
- }
- else if (h < 180) {
- return n2;
- }
- else if (h < 240) {
- return n1 + (n2 - n1) * (240.0f - h) / 60.0f;
- }
- return n1;
- }
-
- /**
- * Converts from RGB color space to HLS colorspace.
- */
- private static float[] rgbToHLS(int rgb, float[] hls) {
- float r = ((rgb & 0xFF0000) >> 16) / 255.0f;
- float g = ((rgb & 0xFF00) >> 8) / 255.0f;
- float b = (rgb & 0xFF) / 255.0f;
-
- /* calculate lightness */
- float max = Math.max(Math.max(r, g), b);
- float min = Math.min(Math.min(r, g), b);
- float l = (max + min) / 2.0f;
- float s = 0;
- float h = 0;
-
- if (max != min) {
- float delta = max - min;
- s = (l <= .5f) ? (delta / (max + min)) : (delta / (2.0f - max -min));
- if (r == max) {
- h = (g - b) / delta;
- }
- else if (g == max) {
- h = 2.0f + (b - r) / delta;
- }
- else {
- h = 4.0f + (r - g) / delta;
- }
- h *= 60.0f;
- if (h < 0) {
- h += 360.0f;
- }
- }
- if (hls == null) {
- hls = new float[3];
- }
- hls[0] = h;
- hls[1] = l;
- hls[2] = s;
- return hls;
- }
-
- /**
- * Creates and returns a new color derived from the passed in color.
- * The transformation is done in the HLS color space using the specified
- * arguments to scale.
- *
- * @param color Color to alter
- * @param hFactory Amount to scale the hue
- * @param lFactor Amount to scale the lightness
- * @param sFactory Amount to sacle saturation
- * @return newly created color
- */
- static Color adjustColor(Color color, float hFactor, float lFactor,
- float sFactor) {
- float h;
- float l;
- float s;
-
- synchronized(HLS_COLOR_LOCK) {
- float[] hls = rgbToHLS(color.getRGB(), HLS_COLORS);
- h = hls[0];
- l = hls[1];
- s = hls[2];
- }
- h = Math.min(360, hFactor * h);
- l = Math.min(1, lFactor * l);
- s = Math.min(1, sFactor * s);
- return new ColorUIResource(hlsToRGB(h, l, s));
- }
-
- protected GTKColorType(String name) {
- super(name);
- }
- }