diff --git a/include/ui/GraphicBufferMapper.h b/include/ui/GraphicBufferMapper.h
index acba353..8e93f72 100644
--- a/include/ui/GraphicBufferMapper.h
+++ b/include/ui/GraphicBufferMapper.h
@@ -44,6 +44,25 @@
 
     status_t unregisterBuffer(buffer_handle_t handle);
 
+    status_t getDimensions(buffer_handle_t handle,
+            uint32_t* outWidth, uint32_t* outHeight) const;
+
+    status_t getFormat(buffer_handle_t handle, int32_t* outFormat) const;
+
+    status_t getLayerCount(buffer_handle_t handle,
+            uint32_t* outLayerCount) const;
+
+    status_t getProducerUsage(buffer_handle_t handle,
+            uint64_t* outProducerUsage) const;
+
+    status_t getConsumerUsage(buffer_handle_t handle,
+            uint64_t* outConsumerUsage) const;
+
+    status_t getBackingStore(buffer_handle_t handle,
+            uint64_t* outBackingStore) const;
+
+    status_t getStride(buffer_handle_t handle, uint32_t* outStride) const;
+
     status_t lock(buffer_handle_t handle,
             uint32_t usage, const Rect& bounds, void** vaddr);