question: public byte [ ] Process ( String fontName ) { try { int j ; for ( j = 0 ; j < fonts . length ; j ++ ) if ( fontName . equals ( fonts [ j ] . name ) ) break ; if ( j == fonts . length ) return null ; if ( gsubrIndexOffset >= 0 ) GBias = CalcBias ( gsubrIndexOffset , j ) ; BuildNewCharString ( j ) ; BuildNewLGSubrs ( j ) ; return BuildNewFile ( j ) ; } catch ( java . io . IOException e ) { throw new IOException ( IOException . IoException , e ) ; } finally { try { buf . close ( ) ; } catch ( Exception e ) { } } }
target:  The Process function extracts one font out of the CFF file and returns a subset version of the original.