#define test_mask_width 13
#define test_mask_height 16
static unsigned char test_mask_bits[] = {
   0x03, 0x00, 0x04, 0x00, 0xfc, 0x01, 0xe0, 0x0f, 0xe0, 0x18, 0xe0, 0x03,
   0xfc, 0x1c, 0xf2, 0x11, 0xf9, 0x03, 0xe9, 0x02, 0x44, 0x04, 0x4c, 0x06,
   0x50, 0x00, 0x40, 0x00, 0x40, 0x00, 0x60, 0x00};
