1 files changed, 15 insertions, 0 deletions
diff --git a/include/mbgl/gfx/rendering_stats.hpp b/include/mbgl/gfx/rendering_stats.hpp
index 8fb01a5825..7cc3edca61 100644
--- a/include/mbgl/gfx/rendering_stats.hpp
+++ b/include/mbgl/gfx/rendering_stats.hpp
@@ -16,7 +16,22 @@ struct RenderingStats {
     int memTextures;
     int memIndexBuffers;
     int memVertexBuffers;
+
+    RenderingStats& operator+=(const RenderingStats& right);
 };
 
+inline RenderingStats& RenderingStats::operator+=(const RenderingStats& r) {
+    numDrawCalls += r.numDrawCalls;
+    numActiveTextures += r.numActiveTextures;
+    numCreatedTextures += r.numCreatedTextures;
+    numBuffers += r.numBuffers;
+    numFrameBuffers += r.numFrameBuffers;
+
+    memTextures += r.memTextures;
+    memIndexBuffers += r.memIndexBuffers;
+    memVertexBuffers += r.memVertexBuffers;
+    return *this;
+}
+
 } // namespace gfx
 } // namespace mbgl
 \ No newline at end of file