#define cross_weave_width 16
#define cross_weave_height 16
static short cross_weave_bits[] = {
   0x5555, 0x8888, 0x5555, 0x2222,
   0x5555, 0x8888, 0x5555, 0x2222,
   0x5555, 0x8888, 0x5555, 0x2222,
   0x5555, 0x8888, 0x5555, 0x2222};