The objects in the arrays returned by getGlyphInfos() and getGlyphPositions() contain private properties: mask, var1, var2 and var respectively.

This makes these object cumbersome to work with in some cases. For example, in Fontra I want a single object per glyph, representing both glyph infos and positioning. I naively thought of doing that like this:

    const glyphInfos = buffer.getGlyphInfos();
    const glyphPositions = buffer.getGlyphPositions();
    const glyphs = [];
    for (let i = 0; i < glyphInfos.length; i++) {
      glyphs.push({ ...glyphInfos[i], ...glyphPositions[i] });
    }

But that doesn't work for the private properties (that I need), because they are not enumerated with the spread syntax.

Ideally I'd really want a combined getGlyphInfos()/getGlyphPositions() api, equivalent to buffer.json(), but including the private fields. But even doing that externally is currently harder than needed.