#define test_mask_width 8
#define test_mask_height 15
static unsigned char test_mask_bits[] = {
   0x0c, 0x0e, 0x79, 0x60, 0x64, 0xfe, 0xf1, 0x74, 0x7e, 0x39, 0x1c, 0x53,
   0x90, 0x90, 0x60};
