Returns whether the surface supports
sophisticated cairo_show_text_glyphs() operations. That is,
whether it actually uses the provided text and cluster data
to a cairo_show_text_glyphs() call.
Note: Even if this function returns FALSE, a
cairo_show_text_glyphs() operation targeted at surface will
still succeed. It just will
act like a cairo_show_glyphs() operation. Users can use this
function to avoid computing UTF-8 text and cluster mapping if the
target surface does not use it.
Since 1.8
Returns whether the surface supports sophisticated cairo_show_text_glyphs() operations. That is, whether it actually uses the provided text and cluster data to a cairo_show_text_glyphs() call. Note: Even if this function returns FALSE, a cairo_show_text_glyphs() operation targeted at surface will still succeed. It just will act like a cairo_show_glyphs() operation. Users can use this function to avoid computing UTF-8 text and cluster mapping if the target surface does not use it. Since 1.8