shift Hue BufferedImage - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Color

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Description

shift Hue BufferedImage

Demo Code


//package com.java2s;

import java.awt.Color;

import java.awt.image.BufferedImage;

public class Main {
    private static final float STEP_SIZE = 7F / 10F;

    public static void shiftHue(BufferedImage img, int amount) {
        float[] hsb = new float[3];
        for (int x = 0; x < img.getWidth(); x++) {
            for (int y = 0; y < img.getHeight(); y++) {
                Color color = new Color(img.getRGB(x, y), true);
                Color.RGBtoHSB(color.getRed(), color.getGreen(),
                        color.getBlue(), hsb);
                hsb[0] = (hsb[0] + (STEP_SIZE * amount)) % 1.0F;
                img.setRGB(x, y, Color.HSBtoRGB(hsb[0], hsb[1], hsb[2]));
                img.getAlphaRaster().setPixel(x, y,
                        new int[] { color.getAlpha() });
            }//from  w ww. j a  v a  2  s .  c om
        }
    }
}

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