The PangoGlyphString structure is used to store strings of glyphs with geometry and visual attribute information. The storage for the glyph information is owned by the structure which simplifies memory management. gintnum_glyphs; the number of glyphs in the string. PangoGlyphInfo*glyphs; an array of PangoGlyphInfo structures of length num_glyphs. gint*log_clusters; for each glyph, byte index of the starting character for the cluster. The indices are relative to the start of the text corresponding to the PangoGlyphString.