+ uint32_t GetFrameInterval(uint32_t frameIndex) const override;
+
+ /**
+ * Get the current rendered frame index.
+ * If there isn't any loaded frame, returns -1.
+ */
+ int32_t GetCurrentFrameIndex() const override;
+
+ /**
+ * Get total frame count of the animated image file.
+ */
+ int32_t GetTotalFrameCount() const override;