namespace lyx {
+class MetricsInfo;
class PainterInfo;
class FontInfo;
class Dimension;
int mathed_string_width(FontInfo const &, docstring const & s);
+void metricsStrRedBlack(MetricsInfo & mi, Dimension & dim, docstring const & s);
+
void drawStrRed(PainterInfo & pi, int x, int y, docstring const & s);
void drawStrBlack(PainterInfo & pi, int x, int y, docstring const & s);