+ /**
+ * @brief Retrieves the number of underline runs.
+ *
+ * @return The number of underline runs.
+ */
+ virtual Length GetNumberOfUnderlineRuns() const = 0;
+
+ /**
+ * @brief Retrieves the underline runs.
+ *
+ * @param[out] underlineRuns Pointer to a buffer where the underline runs are copied.
+ * @param[in] index Index of the first underline run to be copied.
+ * @param[in] numberOfRuns Number of underline runs to be copied.
+ */
+ virtual void GetUnderlineRuns( GlyphRun* underlineRuns,
+ UnderlineRunIndex index,
+ Length numberOfRuns ) const = 0;