perf stuff

ImguiBase/ImguiBase.h

@@ -11,12 +11,18 @@
 #include "imgui.h"
 #include "remixicon.h"
 
+#define IMGUI_REDRAW_COUNT 3
+
 class DrawData {
 public:
     GLFWwindow* window = nullptr;
     HWND window_handle = nullptr;
     ImVec4 clear_color = {};
     ImVec2 window_size = {};
+    float frameTimeSetup = 0.f;
+    float frameTimeDraw = 0.f;
+    float frameTimeRender = 0.f;
+    float frameTimeDisplay = 0.f;
 };
 
 class ImGuiCallbacks {
@@ -26,6 +32,28 @@ public:
     std::function<void(DrawData&)> cleanupFunc = nullptr;
 };
 
+class PerfTimer {
+private:
+    LARGE_INTEGER start;
+    LARGE_INTEGER end;
+    LARGE_INTEGER freq;
+
+public:
+    LONGLONG resultTicks;
+    float resultSeconds;
+
+public:
+    void Start() {
+        QueryPerformanceFrequency(&freq);
+        QueryPerformanceCounter(&start);
+    }
+    void End() {
+        QueryPerformanceCounter(&end);
+        resultTicks = end.QuadPart - start.QuadPart;
+        resultSeconds = static_cast<float>(resultTicks * 1000) / freq.QuadPart;
+    }
+};
+
 int startImgui(ImGuiCallbacks& callbacks, const char* title, int windowWidth, int windowHeight);
 
 ImVec2 getWindowSize(GLFWwindow* window);