See https://github.com/dvdhrm/kmscon/pull/3 for a discussion of K_OFF in the VT
subsystem. We cannot apply it now but we have to reconsider it when the input
subsystem has been written.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Similar to libvte we could speed up font-drawing by using cairo_scaled_font_t to
bypass pango entirely if a glyph is already in the hash-table.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
