Rmk97 medleyfontfile format

[rmkaplan]

No description provided.

[rmkaplan]

This includes MEDLEYFONTFORMAT and changes in other files to include it in the loadup and to load fonts in the new format. But no medley-formatted fonts are included.

The test case would be to load all of the charsets of a BDF-derived or HTML font into a font descriptor, and then execute (MEDLEYFONT.WRITE.FONT font).

You may need to explicitly create the fonts/medleydisplayfonts or fonts/medleyhtmlfonts/ directories.

The document is in docs/internal/MEDLEYFONTFORMAT.TEDIT. (That may not be there--GITFNS said it did not need to be included, that it had been included before, but I'm not sure. LMK.)

This is part of what's included in #2168, which will eventually be closed. The other part is the rearchitecting of FONTCREATE. However, there is a minor update to FONT included here: The FONTDESCRIPTOR has new fields to track the charencoding of the font and whether or not the font is complete. The CHARSETINFO also has a complete flag, plus a slug flag, and a pointer field to an ALIST that typically would include at least the charencoding of the charset.

Fonts that are coded in MCCS should have MCCS at least in FONTCHARENCODING field.

[rmkaplan]

A further comment: on reflection, I believe that this has what is needed to write the new fonts, but additional updates to FONT will be needed to read those files in the normal operation of FONTCREATE. I may have to backfill a few more changes to FONT to link that in. But building comes first.