Available mask patterns for QR-Code. 
- Enumerator: 
 
| eQRMsk_Default  | 
 =-1: Default: Mask is computed automatically (time consuming!)  
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| 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  
 |