Actually, Keep Glyphs does not consider the export state of glyphs.
For instance, if I have turned off the export of my numbers and have a Keep Glyph CP like:
script=latin
script=None
My numbers will still be exported.
Could it be possible for Keep Glyphs to take into account the existing export state of glyphs?
The “Keep Glyphs” parameter is kind of meat be able to overwrite the export state. And with manually set glyph lists, that is fine. But with those filters, it is more complicated. I’ll think about it.
Yes, with glyph lists, there is no problem; this issue only occurs with these filters. I don’t know how it works internally, but perhaps the glyph list output from a filter could exclude non-exported glyphs.