1 files changed, 31 insertions, 0 deletions
diff --git a/core/src/cpp/fps_counter.h b/core/src/cpp/fps_counter.h
new file mode 100644
index 0000000..6ac289e
--- /dev/null
+++ b/core/src/cpp/fps_counter.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include "sprite.h"
+
+struct FPS_Counter {
+    explicit FPS_Counter(SDL_Renderer* renderer);
+
+    void draw();
+
+    /*!
+     * \brief fps_cur - the FPS readings are updated once in a while; fps_cur is
+     * the number of draw() calls since the last reading
+     */
+    int fps_cur{0};
+    /*!
+     * \brief fps_prev - and here is the last fps reading
+     */
+    int fps_prev{0};
+    /*!
+     * \brief timestamp - last time fps_prev was updated
+     */
+    TimeStamp timestamp{Clock::now()};
+    /*!
+     * \brief renderer - draw here
+     */
+    SDL_Renderer* renderer{nullptr};
+    /*!
+     * \brief numbers - "font" file
+     */
+    const Sprite numbers;
+};