Initial commit: wowee native WoW 3.3.5a client

include/rendering/performance_hud.hpp

@@ -0,0 +1,100 @@
+#pragma once
+
+#include <string>
+#include <deque>
+
+namespace wowee {
+
+namespace rendering {
+class Renderer;
+class Camera;
+}
+
+namespace rendering {
+
+/**
+ * Performance HUD for displaying real-time statistics
+ *
+ * Shows FPS, frame time, rendering stats, and terrain info
+ */
+class PerformanceHUD {
+public:
+    PerformanceHUD();
+    ~PerformanceHUD();
+
+    /**
+     * Update HUD with latest frame time
+     * @param deltaTime Time since last frame in seconds
+     */
+    void update(float deltaTime);
+
+    /**
+     * Render HUD using ImGui
+     * @param renderer Renderer for accessing stats
+     * @param camera Camera for position info
+     */
+    void render(const Renderer* renderer, const Camera* camera);
+
+    /**
+     * Enable/disable HUD display
+     */
+    void setEnabled(bool enabled) { this->enabled = enabled; }
+    bool isEnabled() const { return enabled; }
+
+    /**
+     * Toggle HUD visibility
+     */
+    void toggle() { enabled = !enabled; }
+
+    /**
+     * Set HUD position
+     */
+    enum class Position {
+        TOP_LEFT,
+        TOP_RIGHT,
+        BOTTOM_LEFT,
+        BOTTOM_RIGHT
+    };
+    void setPosition(Position pos) { position = pos; }
+
+    /**
+     * Enable/disable specific sections
+     */
+    void setShowFPS(bool show) { showFPS = show; }
+    void setShowRenderer(bool show) { showRenderer = show; }
+    void setShowTerrain(bool show) { showTerrain = show; }
+    void setShowCamera(bool show) { showCamera = show; }
+    void setShowControls(bool show) { showControls = show; }
+
+private:
+    /**
+     * Calculate average FPS from frame time history
+     */
+    void calculateFPS();
+
+    bool enabled = true;  // Enabled by default, press F1 to toggle
+    Position position = Position::TOP_LEFT;
+
+    // Section visibility
+    bool showFPS = true;
+    bool showRenderer = true;
+    bool showTerrain = true;
+    bool showCamera = true;
+    bool showControls = true;
+
+    // FPS tracking
+    std::deque<float> frameTimeHistory;
+    static constexpr size_t MAX_FRAME_HISTORY = 120;  // 2 seconds at 60 FPS
+    float currentFPS = 0.0f;
+    float averageFPS = 0.0f;
+    float minFPS = 0.0f;
+    float maxFPS = 0.0f;
+    float frameTime = 0.0f;
+
+    // Update timing
+    float updateTimer = 0.0f;
+    static constexpr float UPDATE_INTERVAL = 0.1f;  // Update stats every 0.1s
+};
+
+} // namespace rendering
+} // namespace wowee