Averaging colour

gistfile1.java

 public static int average(int argb1, int argb2){
        return (((argb1       & 0xFF) + (argb2       & 0xFF)) >> 1)       | //b
                (((argb1 >>  8 & 0xFF) + (argb2 >>  8 & 0xFF)) >> 1) << 8  | //g
                (((argb1 >> 16 & 0xFF) + (argb2 >> 16 & 0xFF)) >> 1) << 16 | //r
                (((argb1 >> 24 & 0xFF) + (argb2 >> 24 & 0xFF)) >> 1) << 24;  //a
    }

overflow issues:

    public static int average2(int argb1, int argb2){
        return (((argb1 & 0x000000ff) + (argb2 & 0x000000ff)) >> 1)              | //b
               (((argb1 & 0x0000ff00) + (argb2 & 0x0000ff00)) >> 1) & 0x0000ff00 | //g
               (((argb1 & 0x00ff0000) + (argb2 & 0x00ff0000)) >> 1) & 0x00ff0000 | //r
               (((argb1 & 0xff000000) + (argb2 & 0xff000000)) >> 1) & 0xff000000;  //a
    }

Hybrid:

    public static int average2(int argb1, int argb2){
        return (((argb1 & 0x000000ff) + (argb2 & 0x000000ff)) >> 1)              | //b
               (((argb1 & 0x0000ff00) + (argb2 & 0x0000ff00)) >> 1) & 0x0000ff00 | //g
               (((argb1 & 0x00ff0000) + (argb2 & 0x00ff0000)) >> 1) & 0x00ff0000 | //r
               (((argb1 >> 24 & 0xff) + (argb2 >> 24 & 0xff)) >> 1) << 24;  //a
    }