public void ColorAlphaGel String name int int r1 int g1 int b1 Image i

public void ColorAlphaGel(String name, int a, int r1, int g1, int b1) {
        Image img = (Image) gelHashtable.get(name);
        if (img == null) {
            return;
        }
        int color = (0xff << 24) | (r1 << 16) | (g1 << 8) | b1;
        int w = img.getWidth();
        int h = img.getHeight();
        int length = w * h;
        int[] rgbData = new int[length];
        img.getRGB(rgbData, 0, w, 0, 0, w, h);
        int pixel, r, g, b;
        for (int k = 0; k < length; k++) {
            pixel = rgbData[k];
            if (pixel == color) {
                r = (pixel >> 16) & 0xff;
                g = (pixel >> 8) & 0xff;
                b = pixel & 0xff;
                rgbData[k] = (a << 24) | ((r << 16) | (g << 8) | b);
            }
        }
        gelHashtable.put(name, Image.createRGBImage(rgbData, w, h, true));
    }