Initializes a #PangoGlyphItemIter structure to point to the first cluster in a glyph item. See #PangoGlyphItemIter 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
1.22
See Implementation
Initializes a #PangoGlyphItemIter structure to point to the first cluster in a glyph item. See #PangoGlyphItemIter for details of cluster orders.