#define test_mask_width 12
#define test_mask_height 21
static unsigned char test_mask_bits[] = {
   0x70, 0x00, 0xf0, 0x00, 0xf0, 0x03, 0xf0, 0x07, 0xf0, 0x0f, 0xe0, 0x03,
   0xe0, 0x00, 0xf3, 0x01, 0xf7, 0x0f, 0xfc, 0x0b, 0xe0, 0x09, 0xe0, 0x0d,
   0xf0, 0x0d, 0xf8, 0x00, 0xf8, 0x00, 0xdc, 0x01, 0xd8, 0x07, 0x18, 0x0f,
   0x30, 0x08, 0x30, 0x08, 0x1c, 0x00};
