Available mask patterns for QR-Code. 
- Enumerator: 
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| eQRMsk_Default | =-1: Default: Mask is computed automatically (time consuming!)  |  | eQRMsk_0 | =0: Use fixed mask 0  |  | eQRMsk_1 | =1: Use fixed mask 1  |  | eQRMsk_2 | =2: Use fixed mask 2  |  | eQRMsk_3 | =3: Use fixed mask 3  |  | eQRMsk_4 | =4: Use fixed mask 4  |  | eQRMsk_5 | =5: Use fixed mask 5  |  | eQRMsk_6 | =6: Use fixed mask 6  |  | eQRMsk_7 | =7: Use fixed mask 7  |