`FBSCALE` environment variable. So run the demo as: `FBSCALE=3 ./demo` for
a 3x scale factor, or just export the `FBSCALE` env var in the shell you are
going to use for running the demo. The default scale factor is 2x.
`FBSCALE` environment variable. So run the demo as: `FBSCALE=3 ./demo` for
a 3x scale factor, or just export the `FBSCALE` env var in the shell you are
going to use for running the demo. The default scale factor is 2x.