FBOFFSET
rp = ri->ri_bits + FBOFFSET(ri, row, col);
hp = ri->ri_hwbits + FBOFFSET(ri, row, col);
rp = (uint32_t *)(ri->ri_bits + FBOFFSET(ri, row, col));
hp = (uint32_t *)(ri->ri_hwbits + FBOFFSET(ri, row, col));
rp = (PIXEL_TYPE *)(ri->ri_bits + FBOFFSET(ri, row, col));
hp = (PIXEL_TYPE *)(ri->ri_hwbits + FBOFFSET(ri, row, col));
rp = (STAMP_TYPE *)(ri->ri_bits + FBOFFSET(ri, row, col));
hp = (STAMP_TYPE *)(ri->ri_hwbits + FBOFFSET(ri, row, col));