pub unsafe extern "C" fn cairo_scaled_font_text_to_glyphs(
scaled_font: *mut cairo_scaled_font_t,
x: f64,
y: f64,
utf8: *const i8,
utf8_len: i32,
glyphs: *mut *mut cairo_glyph_t,
num_glyphs: *mut i32,
clusters: *mut *mut cairo_text_cluster_t,
num_clusters: *mut i32,
cluster_flags: *mut i32
) -> i32