According to https://docs.microsoft.com/en-us/typography/opentype/spec/os2#fstype the value for "Editable embedding" (OS2WindowsMetricsTable.FSTYPE_EDITIBLE) is 8. It seems that, due to copy-pasting, it has 4, the same as "Preview & Print embedding" (OS2WindowsMetricsTable.FSTYPE_PREVIEW_AND_PRINT).
I was testing system fonts for embeddability by using a mask calculated by "OS2WindowsMetricsTable.FSTYPE_EDITIBLE | OS2WindowsMetricsTable.FSTYPE_PREVIEW_AND_PRINT" and the usual fonts kept failing. Thanks in advance, Constantine -- There is a computer disease that anybody who works with computers knows about. It's a very serious disease and it interferes completely with the work. The trouble with computers is that you 'play' with them! - Richard P. Feynman
