#define shuffle_width 16
#define shuffle_height 16
static unsigned char shuffle_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x00, 0xcc, 0x00,
   0x84, 0x0c, 0xc0, 0x3c, 0x60, 0x3c, 0x30, 0x0c, 0x00, 0x00, 0x30, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};