[Qt] Don't regen BackendScope on every QMapboxGL::render() call

2 files changed, 4 insertions, 1 deletions

diff --git a/platform/qt/src/qmapboxgl.cpp b/platform/qt/src/qmapboxgl.cpp
index edb8afa28a..1f4ad3b456 100644
--- a/platform/qt/src/qmapboxgl.cpp
+++ b/platform/qt/src/qmapboxgl.cpp
@@ -1510,7 +1510,9 @@ void QMapboxGL::render()
 #endif
 
     // The OpenGL implementation automatically enables the OpenGL context for us.
-    mbgl::BackendScope scope { *d_ptr, mbgl::BackendScope::ScopeType::Implicit };
+    if (!d_ptr->backendScope) {
+        d_ptr->backendScope = std::make_unique<mbgl::BackendScope>(*d_ptr, mbgl::BackendScope::ScopeType::Implicit);
+    }
 
     d_ptr->dirty = false;
     d_ptr->mapObj->render(*d_ptr);
diff --git a/platform/qt/src/qmapboxgl_p.hpp b/platform/qt/src/qmapboxgl_p.hpp
index 49a7942cce..91b2ab752e 100644
--- a/platform/qt/src/qmapboxgl_p.hpp
+++ b/platform/qt/src/qmapboxgl_p.hpp
@@ -55,6 +55,7 @@ public:
     std::unique_ptr<mbgl::DefaultFileSource> fileSourceObj;
     std::shared_ptr<mbgl::ThreadPool> threadPool;
     std::unique_ptr<mbgl::Map> mapObj;
+    std::unique_ptr<mbgl::BackendScope> backendScope;
 
     bool dirty { false };