add screensaver and optimize performance

Signed-off-by: Peter Siegmund <developer@mars3142.org>

components/insa/include/ui/ScreenSaver.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "MenuOptions.h"
+#include "common/Widget.h"
+#include <cstdlib>
+#include <vector>
+
+class ScreenSaver final : public Widget
+{
+  public:
+    explicit ScreenSaver(menu_options_t *options);
+
+    void update(uint64_t dt) override;
+    void render() override;
+    void onButtonClicked(ButtonType button) override;
+
+  private:
+    struct Star
+    {
+        float x;
+        float y;
+        float z;
+        float speed;
+    };
+
+    menu_options_t *m_options;
+    uint64_t m_animationCounter;
+    std::vector<Star> m_stars;
+
+    static constexpr int NUM_STARS = 10;
+    static constexpr float SPEED_MULTIPLIER = 0.02f;
+    static constexpr float Z_NEAR = 0.1f;
+    static constexpr float Z_FAR = 10.0f;
+
+    void initStars();
+    void resetStar(Star &star);
+};