AlphaFilter.java Source code

Introduction

Here is the source code for AlphaFilter.java

Source

import java.awt.image.RGBImageFilter;

class AlphaFilter extends RGBImageFilter {
    int alphaLevel;

    public AlphaFilter(int alpha) {
        alphaLevel = alpha;
        canFilterIndexColorModel = true;
    }

    public int filterRGB(int x, int y, int rgb) {
        int alpha = (rgb >> 24) & 0xff;
        alpha = (alpha * alphaLevel) / 255;
        return ((rgb & 0x00ffffff) | (alpha << 24));
    }
}