void drawStrRed(PainterInfo & pi, int x, int y, docstring const & s);
void drawStrBlack(PainterInfo & pi, int x, int y, docstring const & s);
void math_font_max_dim(FontInfo const &, int & asc, int & desc);
void drawStrRed(PainterInfo & pi, int x, int y, docstring const & s);
void drawStrBlack(PainterInfo & pi, int x, int y, docstring const & s);
void math_font_max_dim(FontInfo const &, int & asc, int & desc);