public static extern uiDrawTextLayout *uiDrawNewTextLayout(string text, uiDrawTextFont *defaultFont, double width);
public static extern void uiDrawTextFontGetMetrics(uiDrawTextFont *font, uiDrawTextFontMetrics *metrics);
public static extern UIntPtr uiDrawTextFontHandle(uiDrawTextFont *font);
public static extern void uiDrawTextFontDescribe(uiDrawTextFont *font, uiDrawTextFontDescriptor *desc);
public static extern void uiDrawFreeTextFont(uiDrawTextFont *font);