| ⇢ | A | MaskPattern added |
| ⇢ | A | QRMatrix::mask() added | |
| ⇢ | A | MaskPattern::getMask() added | |
| ⇢ | A | MaskPattern::__construct() added | |
| ⇢ | A | QRMatrix::flip() added | |
| ⇢ | A | QRMatrix::checkType() added | |
| ⇢ | A | MaskPattern::getPattern() added | |
| C | ↗ | B | QRMatrix::mapData() improved |
| A | ↛ | QRMatrix::getMask() removed |