Dead node used by TeX-layout to draw chars.
Supports the node interface and the mask interface.
void vcl_char_init (struct vcl_char *obj, uns code, uns charmap,
int font_id, real font_size,
struct geom_rectangle bbox)
The code, charmap and font_id arguments are fontlib values
specifying a glyph. font_size is the size of the font and bbox is the
bounding box of the glyph, both in local coordinates.