+ * @brief Retrieves the vector of background colors.
+ *
+ * @return Pointer to the vector of background colors.
+ */
+ virtual const Vector4* const GetBackgroundColors() const = 0;
+
+ /**
+ * @brief Retrieves the vector of indices to the vector of background colors.
+ *
+ * @return Pointer to a vector which stores for each glyph the index to the vector of background colors.
+ */
+ virtual const ColorIndex* const GetBackgroundColorIndices() const = 0;
+
+ /**