fbFetchPixel_r3g3b2 (const FbBits *bits, int offset, miIndexedPtr indexed)
{
    CARD32   pixel = READ((CARD8 *) bits + offset);
    CARD32  r,g,b;

    r = ((pixel & 0xe0) | ((pixel & 0xe0) >> 3) | ((pixel & 0xc0) >> 6)) << 16;
    g = ((pixel & 0x1c) | ((pixel & 0x18) >> 3) | ((pixel & 0x1c) << 3)) << 8;
    b = (((pixel & 0x03)     ) |
	 ((pixel & 0x03) << 2) |
	 ((pixel & 0x03) << 4) |
	 ((pixel & 0x03) << 6));
    return (0xff000000 | r | g | b);
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.