diff --git a/services/surfaceflinger/RegionSamplingThread.cpp b/services/surfaceflinger/RegionSamplingThread.cpp
index 7fa33f5..66906e9 100644
--- a/services/surfaceflinger/RegionSamplingThread.cpp
+++ b/services/surfaceflinger/RegionSamplingThread.cpp
@@ -280,6 +280,10 @@
         area.top = height - area.top;
         area.bottom = height - area.bottom;
         std::swap(area.top, area.bottom);
+
+        area.left = width - area.left;
+        area.right = width - area.right;
+        std::swap(area.left, area.right);
     }
 
     std::array<int32_t, 256> brightnessBuckets = {};