| 0,0 → 1,265 |
|---|
| package test.fraktal3d; |
| |
| /* |
| * $Id: ColorUtilities.java 1496 2006-10-22 03:26:24Z gfx $ |
| * |
| * Dual-licensed under LGPL (Sun and Romain Guy) and BSD (Romain Guy). |
| * |
| * Copyright 2005 Sun Microsystems, Inc., 4150 Network Circle, |
| * Santa Clara, California 95054, U.S.A. All rights reserved. |
| * |
| * Copyright (c) 2006 Romain Guy <romain.guy@mac.com> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| // package org.jdesktop.swingx.graphics; |
| |
| import java.awt.Color; |
| |
| /** |
| * <p><code>ColorUtilities</code> contains a set of tools to perform |
| * common color operations easily.</p> |
| * |
| * @author Romain Guy <romain.guy@mac.com> |
| */ |
| public class ColorUtilities { |
| private ColorUtilities() { |
| } |
| |
| /** |
| * <p>Returns the HSL (Hue/Saturation/Luminance) equivalent of a given |
| * RGB color. All three HSL components are between 0.0 and 1.0.</p> |
| * |
| * @param color the RGB color to convert |
| * @return a new array of 3 floats corresponding to the HSL components |
| */ |
| public static float[] RGBtoHSL(Color color) { |
| return RGBtoHSL(color.getRed(), color.getGreen(), color.getBlue(), null); |
| } |
| |
| /** |
| * <p>Returns the HSL (Hue/Saturation/Luminance) equivalent of a given |
| * RGB color. All three HSL components are between 0.0 and 1.0.</p> |
| * |
| * @param color the RGB color to convert |
| * @param hsl a pre-allocated array of floats; can be null |
| * @return <code>hsl</code> if non-null, a new array of 3 floats otherwise |
| * @throws IllegalArgumentException if <code>hsl</code> has a length lower |
| * than 3 |
| */ |
| public static float[] RGBtoHSL(Color color, float[] hsl) { |
| return RGBtoHSL(color.getRed(), color.getGreen(), color.getBlue(), hsl); |
| } |
| |
| /** |
| * <p>Returns the HSL (Hue/Saturation/Luminance) equivalent of a given |
| * RGB color. All three HSL components are between 0.0 and 1.0.</p> |
| * |
| * @param r the red component, between 0 and 255 |
| * @param g the green component, between 0 and 255 |
| * @param b the blue component, between 0 and 255 |
| * @return a new array of 3 floats corresponding to the HSL components |
| */ |
| public static float[] RGBtoHSL(int r, int g, int b) { |
| return RGBtoHSL(r, g, b, null); |
| } |
| |
| /** |
| * <p>Returns the HSL (Hue/Saturation/Luminance) equivalent of a given |
| * RGB color. All three HSL components are floats between 0.0 and 1.0.</p> |
| * |
| * @param r the red component, between 0 and 255 |
| * @param g the green component, between 0 and 255 |
| * @param b the blue component, between 0 and 255 |
| * @param hsl a pre-allocated array of floats; can be null |
| * @return <code>hsl</code> if non-null, a new array of 3 floats otherwise |
| * @throws IllegalArgumentException if <code>hsl</code> has a length lower |
| * than 3 |
| */ |
| public static float[] RGBtoHSL(int r, int g, int b, float[] hsl) { |
| if (hsl == null) { |
| hsl = new float[3]; |
| } else if (hsl.length < 3) { |
| throw new IllegalArgumentException("hsl array must have a length of" + |
| " at least 3"); |
| } |
| |
| if (r < 0) r = 0; |
| else if (r > 255) r = 255; |
| if (g < 0) g = 0; |
| else if (g > 255) g = 255; |
| if (b < 0) b = 0; |
| else if (b > 255) b = 255; |
| |
| float var_R = (r / 255f); |
| float var_G = (g / 255f); |
| float var_B = (b / 255f); |
| |
| float var_Min; |
| float var_Max; |
| float del_Max; |
| |
| if (var_R > var_G) { |
| var_Min = var_G; |
| var_Max = var_R; |
| } else { |
| var_Min = var_R; |
| var_Max = var_G; |
| } |
| if (var_B > var_Max) { |
| var_Max = var_B; |
| } |
| if (var_B < var_Min) { |
| var_Min = var_B; |
| } |
| |
| del_Max = var_Max - var_Min; |
| |
| float H, S, L; |
| L = (var_Max + var_Min) / 2f; |
| |
| if (del_Max - 0.01f <= 0.0f) { |
| H = 0; |
| S = 0; |
| } else { |
| if (L < 0.5f) { |
| S = del_Max / (var_Max + var_Min); |
| } else { |
| S = del_Max / (2 - var_Max - var_Min); |
| } |
| |
| float del_R = (((var_Max - var_R) / 6f) + (del_Max / 2f)) / del_Max; |
| float del_G = (((var_Max - var_G) / 6f) + (del_Max / 2f)) / del_Max; |
| float del_B = (((var_Max - var_B) / 6f) + (del_Max / 2f)) / del_Max; |
| |
| if (var_R == var_Max) { |
| H = del_B - del_G; |
| } else if (var_G == var_Max) { |
| H = (1 / 3f) + del_R - del_B; |
| } else { |
| H = (2 / 3f) + del_G - del_R; |
| } |
| if (H < 0) { |
| H += 1; |
| } |
| if (H > 1) { |
| H -= 1; |
| } |
| } |
| |
| hsl[0] = H; |
| hsl[1] = S; |
| hsl[2] = L; |
| |
| return hsl; |
| } |
| |
| /** |
| * <p>Returns the RGB equivalent of a given HSL (Hue/Saturation/Luminance) |
| * color.</p> |
| * |
| * @param h the hue component, between 0.0 and 1.0 |
| * @param s the saturation component, between 0.0 and 1.0 |
| * @param l the luminance component, between 0.0 and 1.0 |
| * @return a new <code>Color</code> object equivalent to the HSL components |
| */ |
| public static Color HSLtoRGB(float h, float s, float l) { |
| int[] rgb = HSLtoRGB(h, s, l, null); |
| return new Color(rgb[0], rgb[1], rgb[2]); |
| } |
| |
| /** |
| * <p>Returns the RGB equivalent of a given HSL (Hue/Saturation/Luminance) |
| * color. All three RGB components are integers between 0 and 255.</p> |
| * |
| * @param h the hue component, between 0.0 and 1.0 |
| * @param s the saturation component, between 0.0 and 1.0 |
| * @param l the luminance component, between 0.0 and 1.0 |
| * @param rgb a pre-allocated array of ints; can be null |
| * @return <code>rgb</code> if non-null, a new array of 3 ints otherwise |
| * @throws IllegalArgumentException if <code>rgb</code> has a length lower |
| * than 3 |
| */ |
| public static int[] HSLtoRGB(float h, float s, float l, int[] rgb) { |
| if (rgb == null) { |
| rgb = new int[3]; |
| } else if (rgb.length < 3) { |
| throw new IllegalArgumentException("rgb array must have a length of" + |
| " at least 3"); |
| } |
| |
| if (h < 0) h = 0.0f; |
| else if (h > 1.0f) h = 1.0f; |
| if (s < 0) s = 0.0f; |
| else if (s > 1.0f) s = 1.0f; |
| if (l < 0) l = 0.0f; |
| else if (l > 1.0f) l = 1.0f; |
| |
| int R, G, B; |
| |
| if (s - 0.01f <= 0.0f) { |
| R = (int) (l * 255.0f); |
| G = (int) (l * 255.0f); |
| B = (int) (l * 255.0f); |
| } else { |
| float var_1, var_2; |
| if (l < 0.5f) { |
| var_2 = l * (1 + s); |
| } else { |
| var_2 = (l + s) - (s * l); |
| } |
| var_1 = 2 * l - var_2; |
| |
| R = (int) (255.0f * hue2RGB(var_1, var_2, h + (1.0f / 3.0f))); |
| G = (int) (255.0f * hue2RGB(var_1, var_2, h)); |
| B = (int) (255.0f * hue2RGB(var_1, var_2, h - (1.0f / 3.0f))); |
| } |
| |
| rgb[0] = R; |
| rgb[1] = G; |
| rgb[2] = B; |
| |
| return rgb; |
| } |
| |
| private static float hue2RGB(float v1, float v2, float vH) { |
| if (vH < 0.0f) { |
| vH += 1.0f; |
| } |
| if (vH > 1.0f) { |
| vH -= 1.0f; |
| } |
| if ((6.0f * vH) < 1.0f) { |
| return (v1 + (v2 - v1) * 6.0f * vH); |
| } |
| if ((2.0f * vH) < 1.0f) { |
| return (v2); |
| } |
| if ((3.0f * vH) < 2.0f) { |
| return (v1 + (v2 - v1) * ((2.0f / 3.0f) - vH) * 6.0f); |
| } |
| return (v1); |
| } |
| } |