Java BufferedImage Operation applyGrayscaleMaskToAlpha(BufferedImage image, BufferedImage mask)

Description

apply Grayscale Mask To Alpha

License

Apache License

Declaration

public static BufferedImage applyGrayscaleMaskToAlpha(BufferedImage image, BufferedImage mask) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.awt.image.BufferedImage;

public class Main {
    public static BufferedImage applyGrayscaleMaskToAlpha(BufferedImage image, BufferedImage mask) {
        BufferedImage result = new BufferedImage(image.getWidth(), image.getHeight(), image.getType());
        int width = image.getWidth();
        int height = image.getHeight();

        int[] imagePixels = image.getRGB(0, 0, width, height, null, 0, width);
        int[] maskPixels = mask.getRGB(0, 0, width, height, null, 0, width);

        for (int i = 0; i < imagePixels.length; i++) {
            int color = imagePixels[i] & 0x00ffffff; // Mask preexisting alpha
            int alpha = maskPixels[i] << 24; // Shift blue to alpha
            imagePixels[i] = color | alpha;
        }/*from w ww .  ja v a 2  s .  c  o m*/
        result.setRGB(0, 0, width, height, imagePixels, 0, width);
        return result;
    }
}

Related

1. appendImages(BufferedImage leftImage, BufferedImage rightImage)
2. applyAlphaMask(BufferedImage buffer, BufferedImage alphaMask, int imgHeight)
3. applyExplicitSMask(BufferedImage baseImage, BufferedImage sMaskImage)
4. applyGrayDecode(BufferedImage rgbImage, int bitsPerComponent, float[] decode)
5. applyMask(BufferedImage img, Color keyColor)
6. applyMaskImage(BufferedImage src, int x, int y, int w, int h)
7. applyShadow(BufferedImage image)
8. areBufferedImagesEqual(BufferedImage img1, BufferedImage img2)