blog_irregular_shapes_part_1

gistfile1.java

public Bitmap combineImages(Bitmap bgd, Bitmap fg) {
    Bitmap bmp;

    int width = bgd.getWidth() > fg.getWidth() ? 
        bgd.getWidth() : fg.getWidth();
    int height = bgd.getHeight() > fg.getHeight() ? 
        bgd.getHeight() : fg.getHeight();

    bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Paint paint = new Paint();
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP));

    Canvas canvas = new Canvas(bmp);
    canvas.drawBitmap(bgd, 0, 0, null);
    canvas.drawBitmap(fg, 0, 0, paint);

    return bmp;
}