Computes the logical width of the glyph string as can also be computed
using pango_glyph_string_extents(). However, since this only computes the
width, it's much faster. This is in fact only a convenience function that
computes the sum of geometry.width for each glyph in the @glyphs.
Computes the logical width of the glyph string as can also be computed using pango_glyph_string_extents(). However, since this only computes the width, it's much faster. This is in fact only a convenience function that computes the sum of geometry.width for each glyph in the @glyphs.