PangoGlyphItemIter
structure to point to the
first cluster in a glyph item.
See PangoGlyphItemIter
for details of cluster orders.pangoGlyphItemIterInitStart(object, glyph.item, text)
object
glyph.item
PangoGlyphItem
] the glyph item to iterate overtext
FALSE
if there are no clusters in the glyph item