1 files changed, 7 insertions, 1 deletions
diff --git a/platform/default/include/mbgl/gfx/headless_frontend.hpp b/platform/default/include/mbgl/gfx/headless_frontend.hpp
index 8f7a7bf202..353452123d 100644
--- a/platform/default/include/mbgl/gfx/headless_frontend.hpp
+++ b/platform/default/include/mbgl/gfx/headless_frontend.hpp
@@ -1,11 +1,12 @@
 #pragma once
 
+#include <mbgl/gfx/headless_backend.hpp>
 #include <mbgl/map/camera.hpp>
 #include <mbgl/renderer/renderer_frontend.hpp>
-#include <mbgl/gfx/headless_backend.hpp>
 #include <mbgl/util/async_task.hpp>
 #include <mbgl/util/optional.hpp>
 
+#include <atomic>
 #include <memory>
 
 namespace mbgl {
@@ -17,10 +18,12 @@ class TransformState;
 class HeadlessFrontend : public RendererFrontend {
 public:
     HeadlessFrontend(float pixelRatio_,
+                     gfx::HeadlessBackend::SwapBehaviour swapBehviour = gfx::HeadlessBackend::SwapBehaviour::NoFlush,
                      gfx::ContextMode mode = gfx::ContextMode::Unique,
                      const optional<std::string> localFontFamily = {});
     HeadlessFrontend(Size,
                      float pixelRatio_,
+                     gfx::HeadlessBackend::SwapBehaviour swapBehviour = gfx::HeadlessBackend::SwapBehaviour::NoFlush,
                      gfx::ContextMode mode = gfx::ContextMode::Unique,
                      const optional<std::string> localFontFamily = {});
     ~HeadlessFrontend() override;
@@ -29,6 +32,7 @@ public:
     void update(std::shared_ptr<UpdateParameters>) override;
     void setObserver(RendererObserver&) override;
 
+    double getFrameTime() const;
     Size getSize() const;
     void setSize(Size);
 
@@ -45,6 +49,7 @@ public:
 
     PremultipliedImage readStillImage();
     PremultipliedImage render(Map&);
+    void renderOnce(Map&);
 
     optional<TransformState> getTransformState() const;
 
@@ -52,6 +57,7 @@ private:
     Size size;
     float pixelRatio;
 
+    std::atomic<double> frameTime;
     std::unique_ptr<gfx::HeadlessBackend> backend;
     util::AsyncTask asyncInvalidate;