X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fapp%2FFrameCounter.hpp;fp=src%2Fapp%2FFrameCounter.hpp;h=069f622ce690246f5a770a75fc2f766d5d43dba4;hb=5c295a495e02b4987b63c682406f5f29402c00da;hp=0000000000000000000000000000000000000000;hpb=2c2c02796e9df82d0cda12b59aad638d40b4e8b4;p=blank.git

diff --git a/src/app/FrameCounter.hpp b/src/app/FrameCounter.hpp
new file mode 100644
index 0000000..069f622
--- /dev/null
+++ b/src/app/FrameCounter.hpp
@@ -0,0 +1,60 @@
+#ifndef BLANK_APP_FRAMECOUNTER_HPP_
+#define BLANK_APP_FRAMECOUNTER_HPP_
+
+#include <iosfwd>
+#include <SDL.h>
+
+
+namespace blank {
+
+class FrameCounter {
+
+public:
+	void EnterFrame() noexcept;
+	void EnterHandle() noexcept;
+	void ExitHandle() noexcept;
+	void EnterUpdate() noexcept;
+	void ExitUpdate() noexcept;
+	void EnterRender() noexcept;
+	void ExitRender() noexcept;
+	void ExitFrame() noexcept;
+
+	float AvgHandle() const noexcept { return avg.handle; }
+	float AvgUpdate() const noexcept { return avg.update; }
+	float AvgRender() const noexcept { return avg.render; }
+	float AvgFrame() const noexcept { return avg.total; }
+	float AvgRunning() const noexcept { return avg.handle + avg.update + avg.render; }
+	float AvgWaiting() const noexcept { return avg.total - AvgRunning(); }
+
+	bool Changed() const noexcept { return changed; }
+
+	void Print(std::ostream &) const;
+
+private:
+	int Tick() noexcept;
+
+private:
+	static constexpr int NUM_FRAMES = 32;
+	static constexpr float factor = 1.0f / float(NUM_FRAMES);
+
+	template<class T>
+	struct Frame {
+		T handle = T(0);
+		T update = T(0);
+		T render = T(0);
+		T total = T(0);
+	};
+
+	Uint32 last_enter = 0;
+	Uint32 last_tick = 0;
+
+	int cur_frame = 0;
+	Frame<int> running = Frame<int>{};
+	Frame<float> avg = Frame<float>{};
+	bool changed = false;
+
+};
+
+}
+
+#endif