```
QT_QPA_EGLFS_PHYSICAL_WIDTH or QT_QPA_EGLFS_PHYSICAL_HEIGHT is not set! 
Trying to use QScreenSize
Set size to  300  x  400
Height:  1024 Width:  768
Scale ratio:  1.19906  Font:  1.1
DPI is  65.024
MM scale factor is  1
DP scale factor is  0.5
```