Class FrameLoop

src/host/frame_loop.h:37–56

Drives the per-frame cycle: poll input, begin frame, run the draw callback, end frame. Backend-agnostic so it can be unit-tested against a fake.

/// Drives the per-frame cycle: poll input, begin frame, run the draw callback,
/// end frame. Backend-agnostic so it can be unit-tested against a fake.
class FrameLoop {
  public:
    FrameLoop(HostBackend& backend, std::function<void()> draw_frame);

    /// Run one iteration. Returns false if the backend requested close (in
    /// which case nothing was drawn), true after a rendered frame.
    bool tick();

    /// Loop until tick() returns false.
    void run();

    [[nodiscard]] int frame_count() const {
        return frame_count_;
    }

  private:
    HostBackend& backend_;
    std::function<void()> draw_frame_;
    int frame_count_{0};
};

} // namespace oid::host