+ /**
+ * @brief Get Glyph Manager metrics
+ *
+ * @return const reference to glyph manager metrics
+ */
+ const Metrics& GetMetrics();
+
+ /**
+ * @brief Adjust the reference count for glyph
+ *
+ * @param[in] fontId The font this image came from
+ * @param[in] index The index of the glyph
+ * @param[in] style The style of this glyph
+ * @param[in] delta The adjustment to make to the reference count
+ */
+ void AdjustReferenceCount(Text::FontId fontId, Text::GlyphIndex index, const GlyphStyle& style, int32_t delta);