Performance sampler added

BarinkEngine/PerfCounter.cpp

@@ -0,0 +1,70 @@
+#include "src/PerfCounter.h"
+#include <imgui.h>
+#include <iostream>
+
+EngineStatistics ES;
+
+uint64_t EngineInstrumentation::GetPrecisionTime() {
+	using namespace std::chrono; // REMINDER: This is kinda ugly but safes line width
+	return duration_cast<milliseconds>(high_resolution_clock::now().time_since_epoch()).count();
+}
+
+void EngineInstrumentation::PerfomanceSamplerInit() {
+	ES.frames = 0;
+	//EngineInstrumentation::lastSampleTime = GetPrecisionTime();
+}
+
+
+
+void EngineInstrumentation::Update() {
+/*
+uint64_t MilliSecondsPast = GetPrecisionTime() - EngineInstrumentation::lastSampleTime;
+
+	if (MilliSecondsPast >= 1000) {
+
+		ES.frameTime = (float)1000 / ES.frames;
+		ES.FPS = ES.frames;
+		ES.frames = 0;
+		//EngineInstrumentation::lastSampleTime = GetPrecisionTime();
+	}
+*/	
+	
+}
+
+void EngineInstrumentation::ShowStats() {
+	ImGui::Begin("Statistics", false, ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoResize);
+
+	ImGui::Text("FPS: %i", ES.FPS);
+	ImGui::Text("Frame Time: %f", ES.frameTime);
+	ImGui::Text("Verts: %i", ES.verts);
+	ImGui::Text("Draw Calls: %i", ES.DC);
+
+	ImGui::End();
+}
+
+
+PerfSampler::PerfSampler(const std::string& name ) 
+: name(name)
+{
+	using namespace std::chrono;
+	startTime = high_resolution_clock::now();
+	
+}
+
+PerfSampler::~PerfSampler()
+{
+	Stop();
+}
+
+void PerfSampler::Stop()
+{
+	using namespace std::chrono;
+	auto end = high_resolution_clock::now();
+	auto durationInuSeconds = 
+		duration_cast<nanoseconds>(end.time_since_epoch()).count() - 
+		duration_cast<nanoseconds>(startTime.time_since_epoch()).count();
+
+	auto ms = durationInuSeconds * 0.001f;
+
+	std::cout << "[" << name << "]" <<  "Took: " << durationInuSeconds << " us (" << ms << " ms)" << std::endl;
+}

BarinkEngine/src/BarinkEngine.cpp

@@ -1,18 +1,19 @@
 #include "BarinkEngine.h"
 
-EngineStatistics ES;
+extern EngineStatistics ES;
 BarinkEngine::Renderer renderer;
+const unsigned int MS_PER_UPDATE = 2;
 int main(int argc, char* argv[]) {
 	// Setup performance sampler 
-	PerfomanceSamplerInit();
+	EngineInstrumentation::PerfomanceSamplerInit();
 
 	// Startup services 
 	BarinkWindow MainWindow =  BarinkWindow(800, 600);
 
 	renderer = BarinkEngine::Renderer();
 	InputSystem = BarinkEngine::InputManager();
-	ES = EngineStatistics();
 
+	ES = EngineStatistics{};
 	InputSystem.attach(&MainWindow);
 
 	GUIManager GUISystem = GUIManager(&MainWindow);
@@ -20,27 +21,66 @@ int main(int argc, char* argv[]) {
 	glEnable(GL_DEPTH_TEST);
 
 	// First call to setup game
-	Start();
+	{
+		PerfSampler("Start");
+		Start();
+	}
+
+
+	double previous = glfwGetTime();
+	double lag = 0.0;
 
 	// Runtime loop
-	while (!MainWindow.WindowShouldClose()) {
-		SamplePerformance();
+	while (!MainWindow.WindowShouldClose()) 
+	{
+	
+		double current = glfwGetTime();
+		double elapsed = current - previous;
+		previous = current;
+		lag += elapsed;
+
+		//EngineInstrumentation::Update(); // Todo this does nothing right now and is therefor disabled
 
 		// Execute main logic 
-		InputSystem.PollEvents();
-		
-		Update();
+		{
+			PerfSampler("PollEvents");
+			InputSystem.PollEvents();
 
-		GUISystem.Render();
+		}
 		
-		MainWindow.SwapBuffers();
+		{
+			PerfSampler("Update");
+			while (lag >= MS_PER_UPDATE) {
+				Update();
+				lag -= MS_PER_UPDATE;
+			}
+		}
 
-		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		{
+			PerfSampler("Render");
+			Render();
+		}
+		
+		{
+			PerfSampler("GUI-Render");
+			GUISystem.Render();
+		}
+		
+
+		{
+			PerfSampler("BufferSwap");
+			MainWindow.SwapBuffers();
+			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		}
+		
 	}
 
 	// Shutdown game
-	Stop();
-
+	{
+		PerfSampler("Stop");
+		Stop();
+	}
+	
 	// Shutdown Services
 
 	return 0;

BarinkEngine/src/BarinkEngine.h

@@ -20,5 +20,6 @@
 extern BarinkEngine::Renderer renderer;
 extern void Start();
 extern void Update();
+extern void Render();
 extern void ImmediateGraphicsDraw();
 extern void Stop();

BarinkEngine/src/PerfCounter.h

@@ -1,52 +1,37 @@
 #pragma once
+#include <string>
+#include <vector>
 #include <chrono>
-#include <imgui.h>
-
- struct EngineStatistics {
+struct EngineStatistics {
 	float frameTime;
 	uint32_t verts;
 	uint32_t DC;
 
-	long long lastSampleTime;
-	long long frames;
-	long long  FPS;
+	int64_t frames;
+	int64_t  FPS;
+
 };
-extern EngineStatistics ES;
 
-inline void PerfomanceSamplerInit(){
+class EngineInstrumentation {
+public:
 
-	ES.frames = 0;
-	ES.lastSampleTime = 0;
-	ES.lastSampleTime = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::high_resolution_clock::now().time_since_epoch()).count();
-	
-}
+	//static int64_t lastSampleTime;
 
-inline void SamplePerformance(void) {
-	ES.frames++; 
-	ES.DC = 0; 
-	ES.verts = 0; 
-	unsigned long long  now = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::high_resolution_clock::now().time_since_epoch()).count(); 
-	unsigned long long MilliSecondsPast = now - ES.lastSampleTime; 
-	if (MilliSecondsPast >= 1000) {
-			
-			ES.frameTime = (float)1000 / ES.frames; 
-			ES.FPS = ES.frames; 
-			ES.frames = 0; 
-			ES.lastSampleTime = now; 
-	}
-}
+	static uint64_t GetPrecisionTime();
+	static void PerfomanceSamplerInit();
 
+	static void Update();
+	static void ShowStats();
 
+};
 
-inline void ShowStats() {
-	ImGui::Begin("Statistics", false, ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoResize );
+class PerfSampler {
+public:
 
-	ImGui::Text("FPS: %i",			ES.FPS);
-	ImGui::Text("Frame Time: %f",	ES.frameTime);
-	ImGui::Text("Verts: %i",			ES.verts);
-	ImGui::Text("Draw Calls: %i",	ES.DC);
-
-
-	ImGui::End();
-
-}
+	PerfSampler(const std::string& name);
+	~PerfSampler();
+	void Stop();
+private:
+	const std::string& name;
+	std::chrono::time_point<std::chrono::high_resolution_clock> startTime;
+};