Feature: Framerate display window (#6822)

Frame rate and various game loop/graphics timing measurements and graphs. Accessible via the Help menu, and can print some stats in the console via the fps command.

src/video/win32_v.cpp

@@ -23,6 +23,7 @@
 #include "../progress.h"
 #include "../window_gui.h"
 #include "../window_func.h"
+#include "../framerate_type.h"
 #include "win32_v.h"
 #include <windows.h>
 #include <imm.h>
@@ -359,6 +360,8 @@ bool VideoDriver_Win32::MakeWindow(bool full_screen)
 /** Do palette animation and blit to the window. */
 static void PaintWindow(HDC dc)
 {
+	PerformanceMeasurer framerate(PFE_VIDEO);
+
 	HDC dc2 = CreateCompatibleDC(dc);
 	HBITMAP old_bmp = (HBITMAP)SelectObject(dc2, _wnd.dib_sect);
 	HPALETTE old_palette = SelectPalette(dc, _wnd.gdi_palette, FALSE);