//=============================================================================
  // GfxStatsDemo.cpp by Frank Luna (C) 2005 All Rights Reserved.
  //
  // Demonstrates using the performance timer, and the GfxStats class by
  // displaying the frames per second and miliseconds per frame.
  //=============================================================================
  
  include <d3dApp.h>
  include <tchar.h>
  include <crtdbg.h>
  include <GfxStats.h>
  
  class GfxStatsDemo : public D3DApp
  {
  public:
          GfxStatsDemo(HINSTANCE hInstance, std::string winCaption, D3DDEVTYPE devType, DWORD requestedVP);
          ~GfxStatsDemo();
  
          bool checkDeviceCaps();
          void onLostDevice();
          void onResetDevice();
          void updateScene(float dt);
          void drawScene();
  
  private:
          GfxStats* mGfxStats;
          
  };
  
  int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE prevInstance,
                                     PSTR cmdLine, int showCmd)
  {
          // Enable run-time memory check for debug builds.
          #if defined(DEBUG) | defined(_DEBUG)
                  _CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
          #endif
  
          GfxStatsDemo app(hInstance, "Gfx-Stats Demo", D3DDEVTYPE_HAL, D3DCREATE_HARDWARE_VERTEXPROCESSING);
          gd3dApp = &app;
  
          return gd3dApp->run();
  }
  
  GfxStatsDemo::GfxStatsDemo(HINSTANCE hInstance, std::string winCaption, D3DDEVTYPE devType, DWORD requestedVP)
  : D3DApp(hInstance, winCaption, devType, requestedVP)
  {
          if(!checkDeviceCaps())
          {
                  MessageBox(0, "checkDeviceCaps() Failed", 0, 0);
                  PostQuitMessage(0);
          }
  
          mGfxStats = new GfxStats();
  }
  
  GfxStatsDemo::~GfxStatsDemo()
  {
          delete mGfxStats;
  }
  
  bool GfxStatsDemo::checkDeviceCaps()
  {
          // Nothing to check.
          return true;
  }
  
  void GfxStatsDemo::onLostDevice()
  {
          mGfxStats->onLostDevice();
  }
  
  void GfxStatsDemo::onResetDevice()
  {
          mGfxStats->onResetDevice();
  }
  
  void GfxStatsDemo::updateScene(float dt)
  {
          mGfxStats->update(dt);
  }
  
  void GfxStatsDemo::drawScene()
  {
          HR(gd3dDevice->Clear(0, 0, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0xffffffff, 1.0f, 0));
          HR(gd3dDevice->BeginScene());
          mGfxStats->display();
          HR(gd3dDevice->EndScene());
          HR(gd3dDevice->Present(0, 0, 0, 0));
  }