the cluster that this glyph belongs to.
a component value, set by the OpenType layout engine.
the glyph itself.
for Pango internal use
a ligature index value, set by the OpenType layout engine.
the properties value, identifying which features should be applied on this glyph. See pango_ot_ruleset_add_feature().
The
PangoOTGlyphstructure represents a single glyph together with information used for OpenType layout processing of the glyph. It contains the following fields.