Initializes a pango.glyph_item_iter.GlyphItemIter structure to point to the first cluster in a glyph item.
See pango.glyph_item_iter.GlyphItemIter for details of cluster orders.
the glyph item to iterate over
text corresponding to the glyph item
false if there are no clusters in the glyph item
Initializes a pango.glyph_item_iter.GlyphItemIter structure to point to the first cluster in a glyph item.
See pango.glyph_item_iter.GlyphItemIter for details of cluster orders.