[core] only update the render order array when there are changes to tiles

1 files changed, 4 insertions, 2 deletions

diff --git a/src/mbgl/renderer/painter.hpp b/src/mbgl/renderer/painter.hpp
index 8f63388461..28008c5ac5 100644
--- a/src/mbgl/renderer/painter.hpp
+++ b/src/mbgl/renderer/painter.hpp
@@ -134,13 +134,13 @@ public:
 
     bool needsAnimation() const;
 
+    void updateRenderOrder(const Style& style);
+
 private:
     void setup();
     void setupShaders();
     mat4 translatedMatrix(const mat4& matrix, const std::array<float, 2> &translation, const TileID &id, TranslateAnchorType anchor);
 
-    std::vector<RenderItem> determineRenderOrder(const Style& style);
-
     template <class Iterator>
     void renderPass(RenderPass,
                     Iterator it, Iterator end,
@@ -198,6 +198,8 @@ private:
     float depthRangeSize;
     const float depthEpsilon = 1.0f / (1 << 16);
 
+    std::vector<RenderItem> order;
+
 public:
     FrameHistory frameHistory;