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package com.diozero.ws281xj;
/*
* #%L
* Organisation: diozero
* Project: Device I/O Zero - WS281x Java Wrapper
* Filename: PixelColour.java
*
* This file is part of the diozero project. More information about this project
* can be found at https://www.diozero.com/.
* %%
* Copyright (C) 2016 - 2021 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import java.awt.Color;
/**
* 0x00RRGGBB
*/
public class PixelColour {
public static final int RED = 0x00200000;
public static final int ORANGE = 0x00201000;
public static final int YELLOW = 0x00202000;
public static final int GREEN = 0x00002000;
public static final int LIGHT_BLUE = 0x00002020;
public static final int BLUE = 0x00000020;
public static final int PURPLE = 0x00100010;
public static final int PINK = 0x00200010;
public static final int[] RAINBOW = { PixelColour.RED, PixelColour.ORANGE, PixelColour.YELLOW, PixelColour.GREEN,
PixelColour.LIGHT_BLUE, PixelColour.BLUE, PixelColour.PURPLE, PixelColour.PINK };
private static final int WHITE_MASK = 0x00ffffff;
private static final int RED_MASK = 0x00ff0000;
private static final int GREEN_MASK = 0x0000ff00;
private static final int BLUE_MASK = 0x000000ff;
private static final int RED_OFF_MASK = 0x0000ffff;
private static final int GREEN_OFF_MASK = 0x00ff00ff;
private static final int BLUE_OFF_MASK = 0x00ffff00;
public static final int COLOUR_COMPONENT_MAX = 0xff;
/**
* Input a value 0 to 255 to get a colour value.
* The colours are a transition r - g - b - back to r.
* @param wheelPos Position on the colour wheel (range 0..255).
* @return 24-bit RGB colour value
*/
public static int wheel(int wheelPos) {
int max = COLOUR_COMPONENT_MAX;
int one_third = COLOUR_COMPONENT_MAX/3;
int two_thirds = COLOUR_COMPONENT_MAX*2/3;
int wheel_pos = max - wheelPos;
if (wheel_pos < one_third) {
return createColourRGB(max - wheel_pos * 3, 0, wheel_pos * 3);
}
if (wheel_pos < two_thirds) {
wheel_pos -= one_third;
return createColourRGB(0, wheel_pos * 3, max - wheel_pos * 3);
}
wheel_pos -= two_thirds;
return createColourRGB(wheel_pos * 3, max - wheel_pos * 3, 0);
}
/**
* Create a colour from relative RGB values
* @param red Red %, {@code 0 to 1}
* @param green Green %, {@code 0 to 1}
* @param blue Blue %, {@code 0 to 1}
* @return RGB colour integer value
*/
public static int createColourRGB(float red, float green, float blue) {
return createColourRGB(Math.round(COLOUR_COMPONENT_MAX*red),
Math.round(COLOUR_COMPONENT_MAX*green), Math.round(COLOUR_COMPONENT_MAX*blue));
}
/**
* Create a colour from int RGB values
* @param red Red component {@code 0 to 255}
* @param green Green component {@code 0 to 255}
* @param blue Blue component {@code 0 to 255}
* @return RGB colour integer value
*/
public static int createColourRGB(int red, int green, int blue) {
validateColourComponent("Red", red);
validateColourComponent("Green", green);
validateColourComponent("Blue", blue);
return red<<16 | green << 8 | blue;
}
/**
* Creates a colour based on the specified values in the HSB colour model.
*
* @param hue The hue, in degrees, {@code 0.0 to 1.0}
* @param saturation The saturation %, {@code 0.0 to 1.0}
* @param brightness The brightness %, {@code 0.0 to 1.0}
* @return RGB colour integer value
* @throws IllegalArgumentException if {@code hue}, {@code saturation}, {@code brightness} are out of range
*/
public static int createColourHSB(float hue, float saturation, float brightness) {
// Take advantage of Hue Saturation Brightness utility method in java.awt.Color
return Color.HSBtoRGB(hue, saturation, brightness) & WHITE_MASK;
}
/**
* Creates a colour based on the specified values in the HSL colour model.
*
* @param hue The hue, in degrees, {@code 0.0 to 360.0}
* @param saturation The saturation %, {@code 0.0 to 1.0}
* @param luminance The luminance %, {@code 0.0 to 1.0}
* @return RGB colour integer value
* @throws IllegalArgumentException if {@code hue}, {@code saturation}, {@code brightness} are out of range
*/
public static int createColourHSL(float hue, float saturation, float luminance) {
// TODO Not sure this is correct - needs testing!
// Hue Saturation Luminance - see https://tips4java.wordpress.com/2009/07/05/hsl-color/
// Or javafx
//javafx.scene.paint.Color c = javafx.scene.paint.Color.web("hsl(270,100%,100%)");// blue as an hsl web value, implicit alpha
if (saturation < 0.0f) {
saturation = 0;
}
if (saturation > 1.0f) {
saturation = 1;
}
if (luminance < 0.0f || luminance > 1.0f) {
String message = "Color parameter outside of expected range - Luminance";
throw new IllegalArgumentException(message);
}
// Formula needs all values between 0 - 1.
hue = hue % 360.0f;
hue /= 360f;
float q = 0;
if (luminance < 0.5)
q = luminance * (1 + saturation);
else
q = (luminance + saturation) - (saturation * luminance);
float p = 2 * luminance - q;
float r = Math.max(0, HueToRGB(p, q, hue + (1.0f / 3.0f)));
float g = Math.max(0, HueToRGB(p, q, hue));
float b = Math.max(0, HueToRGB(p, q, hue - (1.0f / 3.0f)));
r = Math.min(r, 1.0f);
g = Math.min(g, 1.0f);
b = Math.min(b, 1.0f);
return createColourRGB(r, g, b);
}
private static float HueToRGB(float p, float q, float h) {
if (h < 0)
h += 1;
if (h > 1)
h -= 1;
if (6 * h < 1) {
return p + ((q - p) * 6 * h);
}
if (2 * h < 1) {
return q;
}
if (3 * h < 2) {
return p + ((q - p) * 6 * ((2.0f / 3.0f) - h));
}
return p;
}
public static void validateColourComponent(String colour, int value) {
if (value < 0 || value >= 256) {
throw new IllegalArgumentException("Illegal colour value (" + value +
") for '" + colour + "' - must be 0.." + COLOUR_COMPONENT_MAX);
}
}
public static int getRedComponent(int colour) {
return (colour & RED_MASK) >> 16;
}
public static int setRedComponent(final int colour, int red) {
validateColourComponent("Red", red);
int new_colour = colour & RED_OFF_MASK;
new_colour |= red << 16;
return new_colour;
}
public static int getGreenComponent(int colour) {
return (colour & GREEN_MASK) >> 8;
}
public static int setGreenComponent(final int colour, int green) {
validateColourComponent("Green", green);
int new_colour = colour & GREEN_OFF_MASK;
new_colour |= green << 8;
return new_colour;
}
public static int getBlueComponent(int colour) {
return colour & BLUE_MASK;
}
public static int setBlueComponent(final int colour, int blue) {
validateColourComponent("Blue", blue);
int new_colour = colour & BLUE_OFF_MASK;
new_colour |= blue;
return new_colour;
}
}
