1 files changed, 10 insertions, 1 deletions
diff --git a/include/minikin/FontCollection.h b/include/minikin/FontCollection.h
index dc48f8e..c6c2ed0 100644
--- a/include/minikin/FontCollection.h
+++ b/include/minikin/FontCollection.h
@@ -54,9 +54,12 @@ public:
         int start;
         int end;
     };
+
     void itemize(const uint16_t *string, size_t string_length, FontStyle style,
             std::vector<Run>* result) const;
-    private:
+
+    uint32_t getId() const;
+private:
     static const int kLogCharsPerPage = 8;
     static const int kPageMask = (1 << kLogCharsPerPage) - 1;
 
@@ -70,6 +73,12 @@ public:
         size_t end;
     };
 
+    // static for allocating unique id's
+    static uint32_t sNextId;
+
+    // unique id for this font collection (suitable for cache key)
+    uint32_t mId;
+
     // Highest UTF-32 code point that can be mapped
     uint32_t mMaxChar;