1 files changed, 32 insertions, 0 deletions
diff --git a/include/mbgl/renderer/frame_history.hpp b/include/mbgl/renderer/frame_history.hpp
new file mode 100644
index 0000000000..a5dbe21bca
--- /dev/null
+++ b/include/mbgl/renderer/frame_history.hpp
@@ -0,0 +1,32 @@
+#ifndef MBGL_RENDERER_FRAME_HISTORY
+#define MBGL_RENDERER_FRAME_HISTORY
+
+#include <deque>
+#include <cassert>
+#include <cmath>
+
+#include <mbgl/platform/platform.hpp>
+#include <mbgl/util/time.hpp>
+
+namespace mbgl {
+
+struct FrameSnapshot {
+    explicit inline FrameSnapshot(timestamp t, float z) : t(t), z(z) {}
+    float t;
+    float z;
+};
+
+class FrameHistory {
+public:
+    // Record frame history that will be used to calculate fading params
+    void record(timestamp now, float zoom);
+
+    bool needsAnimation(timestamp duration) const;
+
+public:
+    std::deque<FrameSnapshot> history;
+};
+
+}
+
+#endif