#define test_mask_width 9
#define test_mask_height 21
static unsigned char test_mask_bits[] = {
   0x38, 0x00, 0x7c, 0x00, 0x7c, 0x00, 0x7c, 0x00, 0x7c, 0x00, 0xfc, 0x00,
   0xfe, 0x00, 0xfe, 0x01, 0x3b, 0x01, 0x7d, 0x01, 0x7d, 0x01, 0x7d, 0x01,
   0xbb, 0x01, 0x6d, 0x01, 0x6c, 0x00, 0x6c, 0x00, 0x6c, 0x00, 0x44, 0x00,
   0x44, 0x00, 0x44, 0x00, 0xc6, 0x00};
