//=============================================================================
  // HelloDirect3D.cpp by Frank Luna (C) 2005 All Rights Reserved.
  //
  // Demonstrates Direct3D Initialization and text output using the 
  // framework code.
  //=============================================================================
  
  include <d3dApp.h>
  include <tchar.h>
  include <crtdbg.h>
  
  class HelloD3DApp : public D3DApp
  {
  public:
          HelloD3DApp(HINSTANCE hInstance, std::string winCaption, D3DDEVTYPE devType, DWORD requestedVP);
          ~HelloD3DApp();
  
          bool checkDeviceCaps();
          void onLostDevice();
          void onResetDevice();
          void updateScene(float dt);
          void drawScene();
  
  private:
  
          ID3DXFont* mFont;
  };
  
  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
  
          HelloD3DApp app(hInstance, "Hello Direct3D", D3DDEVTYPE_HAL, D3DCREATE_HARDWARE_VERTEXPROCESSING);
          gd3dApp = &app;
          
          return gd3dApp->run();
  }
  
  HelloD3DApp::HelloD3DApp(HINSTANCE hInstance, std::string winCaption, D3DDEVTYPE devType, DWORD requestedVP)
  : D3DApp(hInstance, winCaption, devType, requestedVP)
  {
          srand(time_t(0));
  
          if(!checkDeviceCaps())
          {
                  MessageBox(0, "checkDeviceCaps() Failed", 0, 0);
                  PostQuitMessage(0);
          }
  
          D3DXFONT_DESC fontDesc;
          fontDesc.Height          = 80;
      fontDesc.Width           = 40;
      fontDesc.Weight          = FW_BOLD;
      fontDesc.MipLevels       = 0;
      fontDesc.Italic          = true;
      fontDesc.CharSet         = DEFAULT_CHARSET;
      fontDesc.OutputPrecision = OUT_DEFAULT_PRECIS;
      fontDesc.Quality         = DEFAULT_QUALITY;
      fontDesc.PitchAndFamily  = DEFAULT_PITCH | FF_DONTCARE;
      _tcscpy(fontDesc.FaceName, _T("Times New Roman"));
  
          HR(D3DXCreateFontIndirect(gd3dDevice, &fontDesc, &mFont));
  }
  
  HelloD3DApp::~HelloD3DApp()
  {
          ReleaseCOM(mFont);
  }
  
  bool HelloD3DApp::checkDeviceCaps()
  {
          // Nothing to check.
          return true;
  }
  
  void HelloD3DApp::onLostDevice()
  {
          HR(mFont->OnLostDevice());
  }
  
  void HelloD3DApp::onResetDevice()
  {
          HR(mFont->OnResetDevice());
  }
  
  void HelloD3DApp::updateScene(float dt)
  {
  }
  
  void HelloD3DApp::drawScene()
  {
          HR(gd3dDevice->Clear(0, 0, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(255, 255, 255), 1.0f, 0));
  
          RECT formatRect;
          GetClientRect(mhMainWnd, &formatRect);
  
          HR(gd3dDevice->BeginScene());
  
          mFont->DrawText(0, _T("Hello Direct3D"), -1, 
                  &formatRect, DT_CENTER | DT_VCENTER, 
                  D3DCOLOR_XRGB(rand() % 256, rand() % 256, rand() % 256));
  
          HR(gd3dDevice->EndScene());
          HR(gd3dDevice->Present(0, 0, 0, 0));
  }