| /* |
| * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.swing.colorchooser; |
| |
| final class ColorModelHSV extends ColorModel { |
| |
| ColorModelHSV() { |
| super("hsv", "Hue", "Saturation", "Value", "Transparency"); // NON-NLS: components |
| } |
| |
| @Override |
| void setColor(int color, float[] space) { |
| super.setColor(color, space); |
| RGBtoHSV(space, space); |
| space[3] = 1.0f - space[3]; |
| } |
| |
| @Override |
| int getColor(float[] space) { |
| space[3] = 1.0f - space[3]; |
| HSVtoRGB(space, space); |
| return super.getColor(space); |
| } |
| |
| @Override |
| int getMaximum(int index) { |
| return (index == 0) ? 360 : 100; |
| } |
| |
| @Override |
| float getDefault(int index) { |
| return (index == 0) ? -1.0f : 1.0f; |
| } |
| |
| /** |
| * Converts HSV components of a color to a set of RGB components. |
| * |
| * @param hsv a float array with length equal to |
| * the number of HSV components |
| * @param rgb a float array with length of at least 3 |
| * that contains RGB components of a color |
| * @return a float array that contains RGB components |
| */ |
| private static float[] HSVtoRGB(float[] hsv, float[] rgb) { |
| if (rgb == null) { |
| rgb = new float[3]; |
| } |
| float hue = hsv[0]; |
| float saturation = hsv[1]; |
| float value = hsv[2]; |
| |
| rgb[0] = value; |
| rgb[1] = value; |
| rgb[2] = value; |
| |
| if (saturation > 0.0f) { |
| hue = (hue < 1.0f) ? hue * 6.0f : 0.0f; |
| int integer = (int) hue; |
| float f = hue - (float) integer; |
| switch (integer) { |
| case 0: |
| rgb[1] *= 1.0f - saturation * (1.0f - f); |
| rgb[2] *= 1.0f - saturation; |
| break; |
| case 1: |
| rgb[0] *= 1.0f - saturation * f; |
| rgb[2] *= 1.0f - saturation; |
| break; |
| case 2: |
| rgb[0] *= 1.0f - saturation; |
| rgb[2] *= 1.0f - saturation * (1.0f - f); |
| break; |
| case 3: |
| rgb[0] *= 1.0f - saturation; |
| rgb[1] *= 1.0f - saturation * f; |
| break; |
| case 4: |
| rgb[0] *= 1.0f - saturation * (1.0f - f); |
| rgb[1] *= 1.0f - saturation; |
| break; |
| case 5: |
| rgb[1] *= 1.0f - saturation; |
| rgb[2] *= 1.0f - saturation * f; |
| break; |
| } |
| } |
| return rgb; |
| } |
| |
| /** |
| * Converts RGB components of a color to a set of HSV components. |
| * |
| * @param rgb a float array with length of at least 3 |
| * that contains RGB components of a color |
| * @param hsv a float array with length equal to |
| * the number of HSV components |
| * @return a float array that contains HSV components |
| */ |
| private static float[] RGBtoHSV(float[] rgb, float[] hsv) { |
| if (hsv == null) { |
| hsv = new float[3]; |
| } |
| float max = ColorModelHSL.max(rgb[0], rgb[1], rgb[2]); |
| float min = ColorModelHSL.min(rgb[0], rgb[1], rgb[2]); |
| |
| float saturation = max - min; |
| if (saturation > 0.0f) { |
| saturation /= max; |
| } |
| hsv[0] = ColorModelHSL.getHue(rgb[0], rgb[1], rgb[2], max, min); |
| hsv[1] = saturation; |
| hsv[2] = max; |
| return hsv; |
| } |
| } |