diff --git a/services/surfaceflinger/BufferLayerConsumer.h b/services/surfaceflinger/BufferLayerConsumer.h
index ea46245..e2ef399 100644
--- a/services/surfaceflinger/BufferLayerConsumer.h
+++ b/services/surfaceflinger/BufferLayerConsumer.h
@@ -150,10 +150,16 @@
     // for use with bilinear filtering.
     void setFilteringEnabled(bool enabled);
 
+    // Sets mCurrentTextureBufferStaleForGpu to true to indicate that the
+    // buffer is now "stale" for GPU composition, and returns the old staleness
+    // bit as a caching hint.
+    bool getAndSetCurrentBufferCacheHint();
+
     // getCurrentBuffer returns the buffer associated with the current image.
     // When outSlot is not nullptr, the current buffer slot index is also
-    // returned.
-    sp<GraphicBuffer> getCurrentBuffer(int* outSlot = nullptr) const;
+    // returned. Simiarly, when outFence is not nullptr, the current output
+    // fence is returned.
+    sp<GraphicBuffer> getCurrentBuffer(int* outSlot = nullptr, sp<Fence>* outFence = nullptr) const;
 
     // getCurrentCrop returns the cropping rectangle of the current buffer.
     Rect getCurrentCrop() const;
@@ -255,6 +261,10 @@
     // must track it separately in order to support the getCurrentBuffer method.
     sp<GraphicBuffer> mCurrentTextureBuffer;
 
+    // True if the buffer was used for the previous client composition frame,
+    // and false otherwise.
+    bool mCurrentTextureBufferStaleForGpu;
+
     // mCurrentCrop is the crop rectangle that applies to the current texture.
     // It gets set each time updateTexImage is called.
     Rect mCurrentCrop;